[gnome-builder/wip/chergert/pipeline] wip: start on build pipeline/stages



commit e20ee4c924d9a82c1aa9b1cffbb9cc135d64273a
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 11 19:30:25 2017 -0800

    wip: start on build pipeline/stages

 configure.ac                                       |    1 -
 libide/Makefile.am                                 |   33 +-
 libide/application/ide-application-private.h       |    2 +
 libide/application/ide-application.c               |   24 +
 libide/application/ide-application.h               |    3 +
 libide/buildsystem/ide-build-command-queue.c       |  299 ----
 libide/buildsystem/ide-build-command-queue.h       |   53 -
 libide/buildsystem/ide-build-command.c             |  403 -----
 libide/buildsystem/ide-build-command.h             |   88 --
 libide/buildsystem/ide-build-log-private.h         |   47 +
 libide/buildsystem/ide-build-log.c                 |  242 +++
 .../{ide-simple-builder.h => ide-build-log.h}      |   34 +-
 libide/buildsystem/ide-build-manager.c             | 1001 +++++--------
 libide/buildsystem/ide-build-manager.h             |   37 +-
 libide/buildsystem/ide-build-pipeline-addin.c      |  109 ++
 libide/buildsystem/ide-build-pipeline-addin.h      |   51 +
 libide/buildsystem/ide-build-pipeline.c            | 1620 ++++++++++++++++++++
 libide/buildsystem/ide-build-pipeline.h            |  112 ++
 libide/buildsystem/ide-build-result-addin.c        |   60 -
 libide/buildsystem/ide-build-result-addin.h        |   47 -
 libide/buildsystem/ide-build-result.c              |  868 -----------
 libide/buildsystem/ide-build-result.h              |   89 --
 libide/buildsystem/ide-build-stage-launcher.c      |  277 ++++
 ...simple-builder.h => ide-build-stage-launcher.h} |   36 +-
 libide/buildsystem/ide-build-stage-mkdirs.c        |  146 ++
 ...e-simple-builder.h => ide-build-stage-mkdirs.h} |   29 +-
 libide/buildsystem/ide-build-stage-private.h       |   38 +
 libide/buildsystem/ide-build-stage-transfer.c      |  183 +++
 ...simple-builder.h => ide-build-stage-transfer.h} |   30 +-
 libide/buildsystem/ide-build-stage.c               |  764 +++++++++
 libide/buildsystem/ide-build-stage.h               |  149 ++
 libide/buildsystem/ide-build-system.c              |  167 +--
 libide/buildsystem/ide-build-system.h              |   31 +-
 libide/buildsystem/ide-builder.c                   |  465 ------
 libide/buildsystem/ide-builder.h                   |  126 --
 libide/buildsystem/ide-configuration-manager.c     |   72 +-
 libide/buildsystem/ide-configuration.c             |  115 +-
 libide/buildsystem/ide-configuration.h             |    9 +-
 libide/buildsystem/ide-simple-builder.c            |  172 ---
 libide/directory/ide-directory-build-system.c      |   23 -
 libide/ide-context.c                               |   22 +
 libide/ide-enums.c.in                              |    3 +-
 libide/ide-types.h                                 |    5 +-
 libide/ide.h                                       |   13 +-
 libide/runner/ide-run-manager.c                    |   16 +-
 libide/runtimes/ide-runtime.c                      |  159 --
 libide/runtimes/ide-runtime.h                      |   48 -
 libide/subprocess/ide-subprocess-launcher.c        |   16 +-
 libide/transfers/ide-transfer-manager.c            |  141 ++-
 libide/transfers/ide-transfer-manager.h            |   30 +-
 libide/transfers/ide-transfer.c                    |    3 +
 libide/transfers/ide-transfer.h                    |    1 +
 libide/util/ide-directory-reaper.c                 |  353 +++++
 libide/util/ide-directory-reaper.h                 |   54 +
 libide/workbench/ide-omni-bar.c                    |   56 +-
 plugins/Makefile.am                                |    1 -
 plugins/autotools/Makefile.am                      |    8 +-
 plugins/autotools/autotools-plugin.c               |    2 +
 .../autotools/ide-autotools-application-addin.c    |    4 +
 plugins/autotools/ide-autotools-autogen-stage.c    |  179 +++
 ...ols-builder.h => ide-autotools-autogen-stage.h} |   17 +-
 plugins/autotools/ide-autotools-build-system.c     |   87 +-
 plugins/autotools/ide-autotools-build-task.c       | 1266 ---------------
 plugins/autotools/ide-autotools-build-task.h       |   55 -
 plugins/autotools/ide-autotools-builder.c          |  802 ----------
 plugins/autotools/ide-autotools-pipeline-addin.c   |  260 ++++
 .../ide-autotools-pipeline-addin.h}                |   14 +-
 plugins/build-tools/gbp-build-log-panel.c          |   87 +-
 plugins/build-tools/gbp-build-log-panel.h          |    5 +-
 plugins/build-tools/gbp-build-panel.c              |  209 ++--
 plugins/build-tools/gbp-build-panel.h              |    3 -
 plugins/build-tools/gbp-build-tool.c               |   98 +-
 plugins/build-tools/gbp-build-workbench-addin.c    |   36 +-
 plugins/contributing/IDEA                          |   62 -
 plugins/contributing/Makefile.am                   |   15 -
 plugins/contributing/configure.ac                  |   12 -
 plugins/contributing/contributing.plugin           |   11 -
 .../contributing/contributing_plugin/__init__.py   |  230 ---
 plugins/contributing/contributing_plugin/helper.py |  141 --
 plugins/flatpak/Makefile.am                        |   24 +-
 plugins/flatpak/gbp-flatpak-pipeline-addin.c       |  485 ++++++
 .../gbp-flatpak-pipeline-addin.h}                  |   14 +-
 plugins/flatpak/gbp-flatpak-runtime.c              |  744 +--------
 plugins/flatpak/gbp-flatpak-transfer.c             |  477 ++++++
 .../flatpak/gbp-flatpak-transfer.h                 |   33 +-
 plugins/flatpak/gbp-flatpak-util.c                 |   69 +
 .../gbp-flatpak-util.h}                            |   15 +-
 plugins/gcc/Makefile.am                            |    4 +-
 plugins/gcc/gbp-gcc-build-result-addin.c           |  267 ----
 plugins/gcc/gbp-gcc-pipeline-addin.c               |   74 +
 ...ild-result-addin.h => gbp-gcc-pipeline-addin.h} |   14 +-
 plugins/gcc/gbp-gcc-plugin.c                       |    6 +-
 plugins/todo/todo_plugin/__init__.py               |    5 +-
 plugins/vala-pack/Makefile.am                      |    1 +
 po/POTFILES.in                                     |    6 -
 tests/Makefile.am                                  |    6 +
 tests/data/project1/.gitignore                     |    1 +
 tests/test-ide-build-pipeline.c                    |  117 ++
 98 files changed, 7084 insertions(+), 7857 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4292d00..3ac18cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -282,7 +282,6 @@ m4_include([plugins/clang/configure.ac])
 m4_include([plugins/color-picker/configure.ac])
 m4_include([plugins/command-bar/configure.ac])
 m4_include([plugins/comment-code/configure.ac])
-m4_include([plugins/contributing/configure.ac])
 m4_include([plugins/create-project/configure.ac])
 m4_include([plugins/ctags/configure.ac])
 m4_include([plugins/devhelp/configure.ac])
diff --git a/libide/Makefile.am b/libide/Makefile.am
index d385eb5..0489dd0 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -30,19 +30,20 @@ libide_1_0_la_public_headers =                            \
        buffers/ide-buffer.h                              \
        buffers/ide-unsaved-file.h                        \
        buffers/ide-unsaved-files.h                       \
-       buildsystem/ide-build-command.h                   \
-       buildsystem/ide-build-command-queue.h             \
+       buildsystem/ide-build-log.h                       \
        buildsystem/ide-build-manager.h                   \
-       buildsystem/ide-build-result-addin.h              \
-       buildsystem/ide-build-result.h                    \
+       buildsystem/ide-build-pipeline.h                  \
+       buildsystem/ide-build-pipeline-addin.h            \
+       buildsystem/ide-build-stage.h                     \
+       buildsystem/ide-build-stage-launcher.h            \
+       buildsystem/ide-build-stage-mkdirs.h              \
+       buildsystem/ide-build-stage-transfer.h            \
        buildsystem/ide-build-system.h                    \
        buildsystem/ide-build-target.h                    \
-       buildsystem/ide-builder.h                         \
        buildsystem/ide-configuration-manager.h           \
        buildsystem/ide-configuration.h                   \
        buildsystem/ide-environment-variable.h            \
        buildsystem/ide-environment.h                     \
-       buildsystem/ide-simple-builder.h                  \
        devices/ide-device-manager.h                      \
        devices/ide-device-provider.h                     \
        devices/ide-device.h                              \
@@ -159,6 +160,7 @@ libide_1_0_la_public_headers =                            \
        tree/ide-tree.h                                   \
        util/ide-cairo.h                                  \
        util/ide-dnd.h                                    \
+       util/ide-directory-reaper.h                       \
        util/ide-file-manager.h                           \
        util/ide-flatpak.h                                \
        util/ide-glib.h                                   \
@@ -200,19 +202,19 @@ libide_1_0_la_public_sources =                            \
        buffers/ide-buffer.c                              \
        buffers/ide-unsaved-file.c                        \
        buffers/ide-unsaved-files.c                       \
-       buildsystem/ide-build-command.c                   \
-       buildsystem/ide-build-command-queue.c             \
        buildsystem/ide-build-manager.c                   \
-       buildsystem/ide-build-result-addin.c              \
-       buildsystem/ide-build-result.c                    \
+       buildsystem/ide-build-pipeline.c                  \
+       buildsystem/ide-build-pipeline-addin.c            \
+       buildsystem/ide-build-stage.c                     \
+       buildsystem/ide-build-stage-launcher.c            \
+       buildsystem/ide-build-stage-mkdirs.c              \
+       buildsystem/ide-build-stage-transfer.c            \
        buildsystem/ide-build-system.c                    \
        buildsystem/ide-build-target.c                    \
-       buildsystem/ide-builder.c                         \
        buildsystem/ide-configuration-manager.c           \
        buildsystem/ide-configuration.c                   \
        buildsystem/ide-environment-variable.c            \
        buildsystem/ide-environment.c                     \
-       buildsystem/ide-simple-builder.c                  \
        devices/ide-device-manager.c                      \
        devices/ide-device-provider.c                     \
        devices/ide-device.c                              \
@@ -334,6 +336,7 @@ libide_1_0_la_public_sources =                            \
        tree/ide-tree.c                                   \
        util/ide-cairo.c                                  \
        util/ide-dnd.c                                    \
+       util/ide-directory-reaper.c                       \
        util/ide-file-manager.c                           \
        util/ide-flatpak.c                                \
        util/ide-glib.c                                   \
@@ -374,6 +377,9 @@ libide_1_0_la_SOURCES =                                   \
        application/ide-application-private.h             \
        application/ide-application-tests.c               \
        application/ide-application-tests.h               \
+       buildsystem/ide-build-log.c                       \
+       buildsystem/ide-build-log-private.h               \
+       buildsystem/ide-build-stage-private.h             \
        editor/ide-editor-frame-actions.c                 \
        editor/ide-editor-frame-actions.h                 \
        editor/ide-editor-frame-private.h                 \
@@ -612,7 +618,8 @@ endif
 
 glib_enum_headers =                        \
        buffers/ide-buffer.h               \
-       buildsystem/ide-build-result.h     \
+       buildsystem/ide-build-log.h        \
+       buildsystem/ide-build-pipeline.h   \
        devices/ide-device.h               \
        diagnostics/ide-diagnostic.h       \
        doap/ide-doap.h                    \
diff --git a/libide/application/ide-application-private.h b/libide/application/ide-application-private.h
index 7dcaa10..71ddd04 100644
--- a/libide/application/ide-application-private.h
+++ b/libide/application/ide-application-private.h
@@ -64,6 +64,8 @@ struct _IdeApplication
 
   GHashTable          *plugin_settings;
 
+  GPtrArray           *reapers;
+
   guint                disable_theme_tracking : 1;
 };
 
diff --git a/libide/application/ide-application.c b/libide/application/ide-application.c
index 0ae4e2e..6be3577 100644
--- a/libide/application/ide-application.c
+++ b/libide/application/ide-application.c
@@ -427,6 +427,17 @@ ide_application_shutdown (GApplication *application)
 
   if (G_APPLICATION_CLASS (ide_application_parent_class)->shutdown)
     G_APPLICATION_CLASS (ide_application_parent_class)->shutdown (application);
+
+  /* Run all reapers serially on shutdown */
+
+  for (guint i = 0; i < self->reapers->len; i++)
+    {
+      IdeDirectoryReaper *reaper = g_ptr_array_index (self->reapers, i);
+
+      g_assert (IDE_IS_DIRECTORY_REAPER (reaper));
+
+      ide_directory_reaper_execute (reaper, NULL, NULL);
+    }
 }
 
 static void
@@ -469,6 +480,7 @@ ide_application_finalize (GObject *object)
   g_clear_pointer (&self->merge_ids, g_hash_table_unref);
   g_clear_pointer (&self->plugin_css, g_hash_table_unref);
   g_clear_pointer (&self->plugin_settings, g_hash_table_unref);
+  g_clear_pointer (&self->reapers, g_ptr_array_unref);
   g_clear_object (&self->worker_manager);
   g_clear_object (&self->keybindings);
   g_clear_object (&self->recent_projects);
@@ -504,6 +516,8 @@ ide_application_init (IdeApplication *self)
 {
   ide_set_program_name (PACKAGE_NAME);
 
+  self->reapers = g_ptr_array_new_with_free_func (g_object_unref);
+
   self->started_at = g_date_time_new_now_utc ();
   self->mode = IDE_APPLICATION_MODE_PRIMARY;
 
@@ -826,3 +840,13 @@ ide_application_get_main_thread (void)
 {
   return main_thread;
 }
+
+void
+ide_application_add_reaper (IdeApplication     *self,
+                            IdeDirectoryReaper *reaper)
+{
+  g_return_if_fail (IDE_IS_APPLICATION (self));
+  g_return_if_fail (IDE_IS_DIRECTORY_REAPER (reaper));
+
+  g_ptr_array_add (self->reapers, g_object_ref (reaper));
+}
diff --git a/libide/application/ide-application.h b/libide/application/ide-application.h
index 607ee0a..76edede 100644
--- a/libide/application/ide-application.h
+++ b/libide/application/ide-application.h
@@ -22,6 +22,7 @@
 #include <gtk/gtk.h>
 
 #include "projects/ide-recent-projects.h"
+#include "util/ide-directory-reaper.h"
 
 G_BEGIN_DECLS
 
@@ -58,6 +59,8 @@ GMenu              *ide_application_get_menu_by_id       (IdeApplication       *
                                                           const gchar          *id);
 gboolean            ide_application_open_project         (IdeApplication       *self,
                                                           GFile                *file);
+void                ide_application_add_reaper           (IdeApplication       *self,
+                                                          IdeDirectoryReaper   *reaper);
 
 G_END_DECLS
 
diff --git a/libide/buildsystem/ide-build-log-private.h b/libide/buildsystem/ide-build-log-private.h
new file mode 100644
index 0000000..83e9866
--- /dev/null
+++ b/libide/buildsystem/ide-build-log-private.h
@@ -0,0 +1,47 @@
+/* ide-build-log-private.h
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_BUILD_LOG_PRIVATE_H
+#define IDE_BUILD_LOG_PRIVATE_H
+
+#include <gio/gio.h>
+
+#include "ide-build-log.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_BUILD_LOG (ide_build_log_get_type())
+
+G_DECLARE_FINAL_TYPE (IdeBuildLog, ide_build_log, IDE, BUILD_LOG, GObject)
+
+IdeBuildLog *ide_build_log_new              (void);
+void         ide_build_log_observer         (IdeBuildLogStream    stream,
+                                             const gchar         *message,
+                                             gssize               message_len,
+                                             gpointer             user_data);
+guint        ide_build_log_add_observer     (IdeBuildLog         *self,
+                                             IdeBuildLogObserver  observer,
+                                             gpointer             observer_data,
+                                             GDestroyNotify       observer_data_destroy);
+gboolean     ide_build_log_remove_observer  (IdeBuildLog         *self,
+                                             guint                observer_id);
+
+
+G_END_DECLS
+
+#endif /* IDE_BUILD_LOG_PRIVATE_H */
diff --git a/libide/buildsystem/ide-build-log.c b/libide/buildsystem/ide-build-log.c
new file mode 100644
index 0000000..eccceae
--- /dev/null
+++ b/libide/buildsystem/ide-build-log.c
@@ -0,0 +1,242 @@
+/* ide-build-log.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-log"
+
+#include <string.h>
+
+#include "application/ide-application.h"
+#include "buildsystem/ide-build-log.h"
+#include "buildsystem/ide-build-log-private.h"
+
+#define POINTER_MARK(p)   GSIZE_TO_POINTER(GPOINTER_TO_SIZE(p)|1)
+#define POINTER_UNMARK(p) GSIZE_TO_POINTER(GPOINTER_TO_SIZE(p)&~(gsize)1)
+#define POINTER_MARKED(p) (GPOINTER_TO_SIZE(p)&1)
+#define DISPATCH_MAX      20
+
+struct _IdeBuildLog
+{
+  GObject      parent_instance;
+
+  GArray      *observers;
+  GAsyncQueue *log_queue;
+  GSource     *log_source;
+
+  guint        sequence;
+};
+
+typedef struct
+{
+  IdeBuildLogObserver callback;
+  gpointer            data;
+  GDestroyNotify      destroy;
+  guint               id;
+} Observer;
+
+G_DEFINE_TYPE (IdeBuildLog, ide_build_log, G_TYPE_OBJECT)
+
+static gboolean
+emit_log_from_main (gpointer user_data)
+{
+  IdeBuildLog *self = user_data;
+  g_autoptr(GPtrArray) ar = g_ptr_array_new ();
+  gpointer item;
+
+  g_assert (IDE_IS_BUILD_LOG (self));
+
+  /*
+   * Pull up to DISPATCH_MAX items from the log queue. We have an upper
+   * bound here so that we don't stall the main loop. Additionally, we
+   * update the ready-time when we run out of items while holding the
+   * async queue lock to synchronize with the caller for further wakeups.
+   */
+  g_async_queue_lock (self->log_queue);
+  for (guint i = 0; i < DISPATCH_MAX; i++)
+    {
+      if (NULL == (item = g_async_queue_try_pop_unlocked (self->log_queue)))
+        {
+          g_source_set_ready_time (self->log_source, -1);
+          break;
+        }
+      g_ptr_array_add (ar, item);
+    }
+  g_async_queue_unlock (self->log_queue);
+
+  for (guint i = 0; i < ar->len; i++)
+    {
+      IdeBuildLogStream stream = IDE_BUILD_LOG_STDOUT;
+      gchar *message;
+      gsize message_len;
+
+      item = g_ptr_array_index (ar, i);
+      message = POINTER_UNMARK (item);
+      message_len = strlen (message);
+
+      if (POINTER_MARKED (item))
+        stream = IDE_BUILD_LOG_STDERR;
+
+      for (guint j = 0; j < self->observers->len; j++)
+        {
+          const Observer *observer = &g_array_index (self->observers, Observer, j);
+
+          observer->callback (stream, message, message_len, observer->data);
+        }
+
+      g_free (message);
+    }
+
+  return G_SOURCE_CONTINUE;
+}
+
+static void
+ide_build_log_finalize (GObject *object)
+{
+  IdeBuildLog *self = (IdeBuildLog *)object;
+
+  g_clear_pointer (&self->log_queue, g_async_queue_unref);
+  g_clear_pointer (&self->log_source, g_source_destroy);
+  g_clear_pointer (&self->observers, g_array_unref);
+
+  G_OBJECT_CLASS (ide_build_log_parent_class)->finalize (object);
+}
+
+static void
+ide_build_log_class_init (IdeBuildLogClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = ide_build_log_finalize;
+}
+
+static void
+ide_build_log_init (IdeBuildLog *self)
+{
+  self->observers = g_array_new (FALSE, FALSE, sizeof (Observer));
+
+  self->log_queue = g_async_queue_new ();
+
+  self->log_source = g_timeout_source_new (G_MAXINT);
+  g_source_set_ready_time (self->log_source, -1);
+  g_source_set_name (self->log_source, "[ide] IdeBuildLog");
+  g_source_set_callback (self->log_source, emit_log_from_main, self, NULL);
+  g_source_attach (self->log_source, g_main_context_default ());
+}
+
+static void
+ide_build_log_via_main (IdeBuildLog       *self,
+                        IdeBuildLogStream  stream,
+                        const gchar       *message,
+                        gsize              message_len)
+{
+  gchar *copied = g_strndup (message, message_len);
+
+  if G_UNLIKELY (stream == IDE_BUILD_LOG_STDERR)
+    copied = POINTER_MARK (copied);
+
+  /*
+   * Add the log entry to our queue to be dispatched in the main thread.
+   * However, we hold the async queue lock while updating the source ready
+   * time so we are synchronized with the main thread for setting the
+   * ready time. This is needed because the main thread may not dispatch
+   * all available items in a single dispatch (to avoid stalling the
+   * main loop).
+   */
+
+  g_async_queue_lock (self->log_queue);
+  g_async_queue_push_unlocked (self->log_queue, copied);
+  g_source_set_ready_time (self->log_source, 0);
+  g_async_queue_unlock (self->log_queue);
+}
+
+void
+ide_build_log_observer (IdeBuildLogStream  stream,
+                        const gchar       *message,
+                        gssize             message_len,
+                        gpointer           user_data)
+{
+  IdeBuildLog *self = user_data;
+
+  g_assert (message != NULL);
+
+  if (message_len < 0)
+    message_len = strlen (message);
+
+  g_assert (message[message_len] == '\0');
+
+  if G_LIKELY (IDE_IS_MAIN_THREAD ())
+    {
+      for (guint i = 0; i < self->observers->len; i++)
+        {
+          const Observer *observer = &g_array_index (self->observers, Observer, i);
+
+          observer->callback (stream, message, message_len, observer->data);
+        }
+    }
+  else
+    {
+      ide_build_log_via_main (self, stream, message, message_len);
+    }
+}
+
+guint
+ide_build_log_add_observer (IdeBuildLog         *self,
+                            IdeBuildLogObserver  observer,
+                            gpointer             observer_data,
+                            GDestroyNotify       observer_data_destroy)
+{
+  Observer ele;
+
+  g_return_val_if_fail (IDE_IS_BUILD_LOG (self), 0);
+  g_return_val_if_fail (observer != NULL, 0);
+
+  ele.id = ++self->sequence;
+  ele.callback = observer;
+  ele.data = observer_data;
+  ele.destroy = observer_data_destroy;
+
+  g_array_append_val (self->observers, ele);
+
+  return ele.id;
+}
+
+gboolean
+ide_build_log_remove_observer (IdeBuildLog *self,
+                               guint        observer_id)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_LOG (self), FALSE);
+  g_return_val_if_fail (observer_id > 0, FALSE);
+
+  for (guint i = 0; i < self->observers->len; i++)
+    {
+      const Observer *observer = &g_array_index (self->observers, Observer, i);
+
+      if (observer->id == observer_id)
+        {
+          g_array_remove_index (self->observers, i);
+          return TRUE;
+        }
+    }
+
+  return FALSE;
+}
+
+IdeBuildLog *
+ide_build_log_new (void)
+{
+  return g_object_new (IDE_TYPE_BUILD_LOG, NULL);
+}
diff --git a/libide/buildsystem/ide-simple-builder.h b/libide/buildsystem/ide-build-log.h
similarity index 55%
copy from libide/buildsystem/ide-simple-builder.h
copy to libide/buildsystem/ide-build-log.h
index 705ef74..a6c807d 100644
--- a/libide/buildsystem/ide-simple-builder.h
+++ b/libide/buildsystem/ide-build-log.h
@@ -1,4 +1,4 @@
-/* ide-simple-builder.h
+/* ide-build-log.h
  *
  * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
@@ -16,32 +16,24 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_SIMPLE_BUILDER_H
-#define IDE_SIMPLE_BUILDER_H
+#ifndef IDE_BUILD_LOG_H
+#define IDE_BUILD_LOG_H
 
-#include "buildsystem/ide-builder.h"
-#include "buildsystem/ide-configuration.h"
+#include <glib.h>
 
 G_BEGIN_DECLS
 
-#define IDE_TYPE_SIMPLE_BUILDER (ide_simple_builder_get_type())
-
-G_DECLARE_DERIVABLE_TYPE (IdeSimpleBuilder, ide_simple_builder, IDE, SIMPLE_BUILDER, IdeBuilder)
-
-struct _IdeSimpleBuilderClass
+typedef enum
 {
-  IdeBuilderClass parent_class;
+  IDE_BUILD_LOG_STDOUT,
+  IDE_BUILD_LOG_STDERR,
+} IdeBuildLogStream;
 
-  gpointer _reserved1;
-  gpointer _reserved2;
-  gpointer _reserved3;
-  gpointer _reserved4;
-  gpointer _reserved5;
-  gpointer _reserved6;
-  gpointer _reserved7;
-  gpointer _reserved8;
-};
+typedef void (*IdeBuildLogObserver) (IdeBuildLogStream  log_stream,
+                                     const gchar       *message,
+                                     gssize             message_len,
+                                     gpointer           user_data);
 
 G_END_DECLS
 
-#endif /* IDE_SIMPLE_BUILDER_H */
+#endif /* IDE_BUILD_LOG_H */
diff --git a/libide/buildsystem/ide-build-manager.c b/libide/buildsystem/ide-build-manager.c
index 1ab9679..d37032f 100644
--- a/libide/buildsystem/ide-build-manager.c
+++ b/libide/buildsystem/ide-build-manager.c
@@ -1,6 +1,6 @@
 /* ide-build-manager.c
  *
- * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ * Copyright (C) 2016-2017 Christian Hergert <chergert redhat com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,44 +18,31 @@
 
 #define G_LOG_DOMAIN "ide-build-manager"
 
-#include <egg-signal-group.h>
-#include <glib/gi18n.h>
-
 #include "ide-context.h"
 #include "ide-debug.h"
 
-#include "buffers/ide-buffer-manager.h"
-#include "buildsystem/ide-builder.h"
 #include "buildsystem/ide-build-manager.h"
-#include "buildsystem/ide-build-result.h"
-#include "buildsystem/ide-build-system.h"
-#include "buildsystem/ide-build-target.h"
-#include "buildsystem/ide-configuration.h"
+#include "buildsystem/ide-build-pipeline.h"
 #include "buildsystem/ide-configuration-manager.h"
+#include "buildsystem/ide-configuration.h"
 
 struct _IdeBuildManager
 {
-  IdeObject             parent_instance;
+  IdeObject         parent_instance;
 
-  EggSignalGroup       *signals;
-  IdeBuildResult       *build_result;
-  GCancellable         *cancellable;
-  GDateTime            *last_build_time;
-  GSimpleActionGroup   *actions;
+  IdeBuildPipeline *pipeline;
+  GDateTime        *last_build_time;
+  GCancellable     *cancellable;
+  GActionGroup     *actions;
 
-  guint                 has_diagnostics : 1;
-  guint                 saving : 1;
+  guint             diagnostic_count;
 };
 
-typedef struct
-{
-  IdeBuilder *builder;
-  IdeBuilderBuildFlags build_flags;
-} BuildState;
-
-static void action_group_iface_init (GActionGroupInterface *iface);
+static void initable_iface_init     (GInitableIface *);
+static void action_group_iface_init (GActionGroupInterface *);
 
 G_DEFINE_TYPE_EXTENDED (IdeBuildManager, ide_build_manager, IDE_TYPE_OBJECT, 0,
+                        G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
                         G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_GROUP, action_group_iface_init))
 
 enum {
@@ -79,174 +66,99 @@ static GParamSpec *properties [N_PROPS];
 static guint signals [N_SIGNALS];
 
 static void
-build_state_free (gpointer data)
-{
-  BuildState *state = data;
-
-  if (state != NULL)
-    {
-      g_clear_object (&state->builder);
-      g_slice_free (BuildState, state);
-    }
-}
-
-static void
-ide_build_manager__build_result__notify_mode (IdeBuildManager *self,
-                                              GParamSpec      *mode_pspec,
-                                              IdeBuildResult  *build_result)
+ide_build_manager_handle_diagnostic (IdeBuildManager  *self,
+                                     IdeDiagnostic    *diagnostic,
+                                     IdeBuildPipeline *pipeline)
 {
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
   g_assert (IDE_IS_BUILD_MANAGER (self));
+  g_assert (diagnostic != NULL);
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
 
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_MESSAGE]);
-}
-
-static void
-ide_build_manager__build_result__notify_running (IdeBuildManager *self,
-                                                 GParamSpec      *running_pspec,
-                                                 IdeBuildResult  *build_result)
-{
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  self->diagnostic_count++;
 
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+  if (self->diagnostic_count == 1)
+    g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_HAS_DIAGNOSTICS]);
 }
 
 static void
-ide_build_manager__build_result__notify_running_time (IdeBuildManager *self,
-                                                      GParamSpec      *running_time_pspec,
-                                                      IdeBuildResult  *build_result)
+ide_build_manager_invalidate_pipeline (IdeBuildManager *self)
 {
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  IdeConfigurationManager *config_manager;
+  IdeConfiguration *config;
+  IdeContext *context;
 
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_RUNNING_TIME]);
-}
+  IDE_ENTRY;
 
-static void
-ide_build_manager__build_result__diagnostic (IdeBuildManager *self,
-                                             IdeDiagnostic   *diagnostic,
-                                             IdeBuildResult  *build_result)
-{
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-  g_assert (diagnostic != NULL);
   g_assert (IDE_IS_BUILD_MANAGER (self));
 
-  if (self->has_diagnostics == FALSE)
-    {
-      self->has_diagnostics = TRUE;
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_HAS_DIAGNOSTICS]);
-    }
-}
-
-static void
-ide_build_manager_build_activate (GSimpleAction *action,
-                                  GVariant      *parameter,
-                                  gpointer       user_data)
-{
-  IdeBuildManager *self = user_data;
-
-  g_assert (G_IS_SIMPLE_ACTION (action));
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  IDE_TRACE_MSG ("Reloading pipeline due to configuration change");
 
-  ide_build_manager_build_async (self,
-                                 NULL,
-                                 IDE_BUILDER_BUILD_FLAGS_NONE,
-                                 NULL,
-                                 NULL,
-                                 NULL);
-}
+  if (self->cancellable != NULL)
+    ide_build_manager_cancel (self);
 
-static void
-ide_build_manager_rebuild_activate (GSimpleAction *action,
-                                    GVariant      *parameter,
-                                    gpointer       user_data)
-{
-  IdeBuildManager *self = user_data;
+  g_clear_object (&self->pipeline);
 
-  g_assert (G_IS_SIMPLE_ACTION (action));
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  context = ide_object_get_context (IDE_OBJECT (self));
+  config_manager = ide_context_get_configuration_manager (context);
+  config = ide_configuration_manager_get_current (config_manager);
 
-  ide_build_manager_build_async (self,
-                                 NULL,
-                                 IDE_BUILDER_BUILD_FLAGS_FORCE_CLEAN,
-                                 NULL,
-                                 NULL,
+  self->pipeline = g_object_new (IDE_TYPE_BUILD_PIPELINE,
+                                 "context", context,
+                                 "configuration", config,
                                  NULL);
-}
 
-static void
-ide_build_manager_cancel_activate (GSimpleAction *action,
-                                   GVariant      *parameter,
-                                   gpointer       user_data)
-{
-  IdeBuildManager *self = user_data;
-
-  g_assert (G_IS_SIMPLE_ACTION (action));
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  g_signal_connect_object (self->pipeline,
+                           "diagnostic",
+                           G_CALLBACK (ide_build_manager_handle_diagnostic),
+                           self,
+                           G_CONNECT_SWAPPED);
 
-  ide_build_manager_cancel (self);
-}
+  self->diagnostic_count = 0;
 
-static void
-ide_build_manager_clean_activate (GSimpleAction *action,
-                                  GVariant      *parameter,
-                                  gpointer       user_data)
-{
-  IdeBuildManager *self = user_data;
+  g_clear_pointer (&self->last_build_time, g_date_time_unref);
+  g_clear_object (&self->cancellable);
 
-  g_assert (G_IS_SIMPLE_ACTION (action));
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_HAS_DIAGNOSTICS]);
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_LAST_BUILD_TIME]);
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_MESSAGE]);
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_RUNNING_TIME]);
 
-  ide_build_manager_build_async (self,
-                                 NULL,
-                                 (IDE_BUILDER_BUILD_FLAGS_FORCE_CLEAN |
-                                  IDE_BUILDER_BUILD_FLAGS_NO_BUILD),
-                                 NULL,
-                                 NULL,
-                                 NULL);
+  IDE_EXIT;
 }
 
-static void
-ide_build_manager__build_result__notify_failed (IdeBuildManager *self,
-                                                GParamSpec      *pspec,
-                                                IdeBuildResult  *build_result)
+static gboolean
+initable_init (GInitable     *initable,
+               GCancellable  *cancellable,
+               GError       **error)
 {
-  g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
+  IdeBuildManager *self = (IdeBuildManager *)initable;
+  IdeConfigurationManager *config_manager;
+  IdeContext *context;
 
-  if (ide_build_result_get_failed (build_result))
-    g_signal_emit (self, signals [BUILD_FAILED], 0, build_result);
-}
+  IDE_ENTRY;
 
-static void
-ide_build_manager_real_build_started (IdeBuildManager *self,
-                                      IdeBuildResult  *build_result)
-{
   g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
 
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
-}
+  context = ide_object_get_context (IDE_OBJECT (self));
+  config_manager = ide_context_get_configuration_manager (context);
 
-static void
-ide_build_manager_real_build_failed (IdeBuildManager *self,
-                                     IdeBuildResult  *build_result)
-{
-  g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
+  g_signal_connect_object (config_manager,
+                           "invalidate",
+                           G_CALLBACK (ide_build_manager_invalidate_pipeline),
+                           self,
+                           G_CONNECT_SWAPPED);
 
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+  ide_build_manager_invalidate_pipeline (self);
+
+  IDE_RETURN (TRUE);
 }
 
 static void
-ide_build_manager_real_build_finished (IdeBuildManager *self,
-                                       IdeBuildResult  *build_result)
+initable_iface_init (GInitableIface *iface)
 {
-  g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+  iface->init = initable_init;
 }
 
 static void
@@ -254,9 +166,7 @@ ide_build_manager_finalize (GObject *object)
 {
   IdeBuildManager *self = (IdeBuildManager *)object;
 
-  g_clear_object (&self->build_result);
-  g_clear_object (&self->signals);
-  g_clear_object (&self->actions);
+  g_clear_object (&self->pipeline);
   g_clear_object (&self->cancellable);
   g_clear_pointer (&self->last_build_time, g_date_time_unref);
 
@@ -277,22 +187,22 @@ ide_build_manager_get_property (GObject    *object,
       g_value_set_boolean (value, ide_build_manager_get_busy (self));
       break;
 
-    case PROP_LAST_BUILD_TIME:
-      g_value_set_boxed (value, ide_build_manager_get_last_build_time (self));
-      break;
-
-    case PROP_HAS_DIAGNOSTICS:
-      g_value_set_boolean (value, self->has_diagnostics);
-      break;
-
     case PROP_MESSAGE:
       g_value_take_string (value, ide_build_manager_get_message (self));
       break;
 
+    case PROP_LAST_BUILD_TIME:
+      g_value_set_boxed (value, ide_build_manager_get_last_build_time (self));
+      break;
+
     case PROP_RUNNING_TIME:
       g_value_set_int64 (value, ide_build_manager_get_running_time (self));
       break;
 
+    case PROP_HAS_DIAGNOSTICS:
+      g_value_set_boolean (value, self->diagnostic_count > 0);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
@@ -306,511 +216,422 @@ ide_build_manager_class_init (IdeBuildManagerClass *klass)
   object_class->finalize = ide_build_manager_finalize;
   object_class->get_property = ide_build_manager_get_property;
 
+  /**
+   * IdeBuildManager:busy:
+   *
+   * The "busy" property indicates if there is currently a build
+   * executing. This can be bound to UI elements to display to the
+   * user that a build is active (and therefore other builds cannot
+   * be activated at the moment).
+   */
   properties [PROP_BUSY] =
     g_param_spec_boolean ("busy",
                           "Busy",
-                          "If the build manager is busy building",
+                          "If a build is actively executing",
                           FALSE,
-                          (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
-
-  properties [PROP_LAST_BUILD_TIME] =
-    g_param_spec_boxed ("last-build-time",
-                        "Last Build Time",
-                        "The time the last build was submitted",
-                        G_TYPE_DATE_TIME,
-                        (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
 
+  /**
+   * IdeBuildManager:has-diagnostics:
+   *
+   * The "has-diagnostics" property indicates that there have been
+   * diagnostics found during the last execution of the build pipeline.
+   */
   properties [PROP_HAS_DIAGNOSTICS] =
     g_param_spec_boolean ("has-diagnostics",
                           "Has Diagnostics",
-                          "If the build result has diagnostics",
+                          "Has Diagnostics",
                           FALSE,
-                          (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
 
+  /**
+   * IdeBuildManager:last-build-time:
+   *
+   * The "last-build-time" property contains a #GDateTime of the time
+   * the last build request was submitted.
+   */
+  properties [PROP_LAST_BUILD_TIME] =
+    g_param_spec_boxed ("last-build-time",
+                        "Last Build Time",
+                        "The time of the last build request",
+                        G_TYPE_DATE_TIME,
+                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  /**
+   * IdeBuildManager:message:
+   *
+   * The "message" property contains a string message describing
+   * the current state of the build process. This may be bound to
+   * UI elements to notify the user of the buid progress.
+   */
   properties [PROP_MESSAGE] =
     g_param_spec_string ("message",
                          "Message",
                          "The current build message",
                          NULL,
-                         (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
-
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  /**
+   * IdeBuildManager:running-time:
+   *
+   * The "running-time" property can be bound by UI elements that
+   * want to track how long the current build has taken. g_object_notify()
+   * is called on a regular interval during the build so that the UI
+   * elements may automatically update.
+   *
+   * The value of this property is a #GTimeSpan, which are 64-bit signed
+   * integers with microsecond precision. See %G_USEC_PER_SEC for a constant
+   * to tranform this to seconds.
+   */
   properties [PROP_RUNNING_TIME] =
     g_param_spec_int64 ("running-time",
                         "Running Time",
-                        "The duration of the build as a GTimeSpan",
+                        "The amount of elapsed time performing the current build",
                         0,
                         G_MAXINT64,
                         0,
-                        (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
 
   g_object_class_install_properties (object_class, N_PROPS, properties);
 
+  /**
+   * IdeBuildManager::build-started:
+   * @self: An #IdeBuildManager
+   * @pipeline: An #IdeBuildPipeline
+   *
+   * The "build-started" signal is emitted when a new build has started.
+   * The build may be an incremental build. The @pipeline instance is
+   * the build pipeline which is being executed.
+   */
   signals [BUILD_STARTED] =
     g_signal_new_class_handler ("build-started",
                                 G_TYPE_FROM_CLASS (klass),
                                 G_SIGNAL_RUN_LAST,
-                                G_CALLBACK (ide_build_manager_real_build_started),
-                                NULL,
                                 NULL,
+                                NULL, NULL,
                                 NULL,
-                                G_TYPE_NONE, 1, IDE_TYPE_BUILD_RESULT);
-
+                                G_TYPE_NONE, 1, IDE_TYPE_BUILD_PIPELINE);
+
+  /**
+   * IdeBuildManager::build-failed:
+   * @self: An #IdeBuildManager
+   * @pipeline: An #IdeBuildPipeline
+   *
+   * The "build-failed" signal is emitted when a build that was previously
+   * notified via #IdeBuildManager::build-started has failed to complete
+   * successfully.
+   *
+   * Contrast this with #IdeBuildManager::build-finished for a successful
+   * build.
+   */
   signals [BUILD_FAILED] =
     g_signal_new_class_handler ("build-failed",
                                 G_TYPE_FROM_CLASS (klass),
                                 G_SIGNAL_RUN_LAST,
-                                G_CALLBACK (ide_build_manager_real_build_failed),
                                 NULL,
+                                NULL, NULL,
                                 NULL,
-                                NULL,
-                                G_TYPE_NONE, 1, IDE_TYPE_BUILD_RESULT);
-
+                                G_TYPE_NONE, 1, IDE_TYPE_BUILD_PIPELINE);
+
+  /**
+   * IdeBuildManager::build-finished:
+   * @self: An #IdeBuildManager
+   * @pipeline: An #IdeBuildPipeline
+   *
+   * The "build-finished" signal is emitted when a build completed
+   * successfully.
+   */
   signals [BUILD_FINISHED] =
     g_signal_new_class_handler ("build-finished",
                                 G_TYPE_FROM_CLASS (klass),
                                 G_SIGNAL_RUN_LAST,
-                                G_CALLBACK (ide_build_manager_real_build_finished),
                                 NULL,
+                                NULL, NULL,
                                 NULL,
-                                NULL,
-                                G_TYPE_NONE, 1, IDE_TYPE_BUILD_RESULT);
+                                G_TYPE_NONE, 1, IDE_TYPE_BUILD_PIPELINE);
 }
 
 static void
-ide_build_manager_init (IdeBuildManager *self)
+ide_build_manager_action_cancel (GSimpleAction *action,
+                                 GVariant      *param,
+                                 gpointer       user_data)
 {
-  static const GActionEntry action_entries[] = {
-    { "build", ide_build_manager_build_activate },
-    { "cancel", ide_build_manager_cancel_activate },
-    { "clean", ide_build_manager_clean_activate },
-    { "rebuild", ide_build_manager_rebuild_activate },
-  };
+  IdeBuildManager *self = user_data;
 
-  self->signals = egg_signal_group_new (IDE_TYPE_BUILD_RESULT);
+  IDE_ENTRY;
 
-  egg_signal_group_connect_object (self->signals,
-                                   "notify::failed",
-                                   G_CALLBACK (ide_build_manager__build_result__notify_failed),
-                                   self,
-                                   G_CONNECT_SWAPPED);
+  g_assert (G_IS_SIMPLE_ACTION (action));
+  g_assert (IDE_IS_BUILD_MANAGER (self));
 
-  egg_signal_group_connect_object (self->signals,
-                                   "notify::mode",
-                                   G_CALLBACK (ide_build_manager__build_result__notify_mode),
-                                   self,
-                                   G_CONNECT_SWAPPED);
+  ide_build_manager_cancel (self);
 
-  egg_signal_group_connect_object (self->signals,
-                                   "notify::running",
-                                   G_CALLBACK (ide_build_manager__build_result__notify_running),
-                                   self,
-                                   G_CONNECT_SWAPPED);
+  IDE_EXIT;
+}
 
-  egg_signal_group_connect_object (self->signals,
-                                   "notify::running-time",
-                                   G_CALLBACK (ide_build_manager__build_result__notify_running_time),
-                                   self,
-                                   G_CONNECT_SWAPPED);
+static void
+ide_build_manager_action_build (GSimpleAction *action,
+                                GVariant      *param,
+                                gpointer       user_data)
+{
+  IdeBuildManager *self = user_data;
 
-  egg_signal_group_connect_object (self->signals,
-                                   "diagnostic",
-                                   G_CALLBACK (ide_build_manager__build_result__diagnostic),
-                                   self,
-                                   G_CONNECT_SWAPPED);
+  IDE_ENTRY;
 
-  self->actions = g_simple_action_group_new ();
+  g_assert (G_IS_SIMPLE_ACTION (action));
+  g_assert (IDE_IS_BUILD_MANAGER (self));
 
-  g_action_map_add_action_entries (G_ACTION_MAP (self->actions),
-                                   action_entries,
-                                   G_N_ELEMENTS (action_entries),
-                                   self);
+  ide_build_manager_execute_async (self, IDE_BUILD_PHASE_BUILD, NULL, NULL, NULL);
 
-  g_object_bind_property (self,
-                          "busy",
-                          g_action_map_lookup_action (G_ACTION_MAP (self->actions), "build"),
-                          "enabled",
-                          G_BINDING_SYNC_CREATE | G_BINDING_INVERT_BOOLEAN);
-
-  g_object_bind_property (self,
-                          "busy",
-                          g_action_map_lookup_action (G_ACTION_MAP (self->actions), "rebuild"),
-                          "enabled",
-                          G_BINDING_SYNC_CREATE | G_BINDING_INVERT_BOOLEAN);
-
-  g_object_bind_property (self,
-                          "busy",
-                          g_action_map_lookup_action (G_ACTION_MAP (self->actions), "clean"),
-                          "enabled",
-                          G_BINDING_SYNC_CREATE | G_BINDING_INVERT_BOOLEAN);
-
-  g_object_bind_property (self,
-                          "busy",
-                          g_action_map_lookup_action (G_ACTION_MAP (self->actions), "cancel"),
-                          "enabled",
-                          G_BINDING_SYNC_CREATE);
-
-  g_signal_connect_object (self->actions,
-                           "action-enabled-changed",
-                           G_CALLBACK (g_action_group_action_enabled_changed),
-                           self,
-                           G_CONNECT_SWAPPED);
+  IDE_EXIT;
 }
 
 static void
-ide_build_manager_set_build_result (IdeBuildManager *self,
-                                    IdeBuildResult  *build_result)
+ide_build_manager_action_rebuild (GSimpleAction *action,
+                                  GVariant      *param,
+                                  gpointer       user_data)
 {
+  IdeBuildManager *self = user_data;
+
   IDE_ENTRY;
 
+  g_assert (G_IS_SIMPLE_ACTION (action));
   g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (!build_result || IDE_IS_BUILD_RESULT (build_result));
 
-  if (g_set_object (&self->build_result, build_result))
-    {
-      egg_signal_group_set_target (self->signals, build_result);
+#if 0
+  if (self->pipeline != NULL)
+    ide_build_pipeline_invalidate_phase (self->pipeline, 
+#endif
 
-      self->has_diagnostics = FALSE;
-
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_LAST_BUILD_TIME]);
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_MESSAGE]);
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_RUNNING_TIME]);
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_HAS_DIAGNOSTICS]);
-
-      g_signal_emit (self, signals [BUILD_STARTED], 0, build_result);
-    }
+  ide_build_manager_execute_async (self, IDE_BUILD_PHASE_BUILD, NULL, NULL, NULL);
 
   IDE_EXIT;
 }
 
-static gboolean
-ide_build_manager_check_busy (IdeBuildManager  *self,
-                              GError          **error)
+static void
+ide_build_manager_action_clean (GSimpleAction *action,
+                                GVariant      *param,
+                                gpointer       user_data)
 {
-  g_assert (IDE_IS_BUILD_MANAGER (self));
-
-  if (ide_build_manager_get_busy (self))
-    {
-      g_set_error (error,
-                   G_IO_ERROR,
-                   G_IO_ERROR_BUSY,
-                   "%s",
-                   _("A build is already in progress"));
-      return TRUE;
-    }
-
-  return FALSE;
-}
+  IdeBuildManager *self = user_data;
 
-static IdeBuilder *
-ide_build_manager_get_builder (IdeBuildManager  *self,
-                               GError          **error)
-{
-  IdeConfigurationManager *config_manager;
-  IdeConfiguration *config;
-  IdeBuildSystem *build_system;
-  IdeContext *context;
+  IDE_ENTRY;
 
+  g_assert (G_IS_SIMPLE_ACTION (action));
   g_assert (IDE_IS_BUILD_MANAGER (self));
 
-  context = ide_object_get_context (IDE_OBJECT (self));
-
-  config_manager = ide_context_get_configuration_manager (context);
-  config = ide_configuration_manager_get_current (config_manager);
+#if 0
+  /* TODO: wipe pipeline and start over? */
+  if (self->pipeline != NULL)
+    ide_build_pipeline_invalidate_phase (self->pipeline, 
+  ide_build_manager_execute_async (self, IDE_BUILD_PHASE_BUILD, NULL, NULL, NULL);
+#endif
 
-  build_system = ide_context_get_build_system (context);
-
-  return ide_build_system_get_builder (build_system, config, error);
+  IDE_EXIT;
 }
 
 static void
-ide_build_manager_build_cb (GObject      *object,
-                            GAsyncResult *result,
-                            gpointer      user_data)
+ide_build_manager_init (IdeBuildManager *self)
 {
-  IdeBuilder *builder = (IdeBuilder *)object;
-  g_autoptr(IdeBuildResult) build_result = NULL;
-  g_autoptr(GTask) task = user_data;
-  IdeBuildManager *self;
-  GError *error = NULL;
+  static GActionEntry actions[] = {
+    { "build", ide_build_manager_action_build },
+    { "cancel", ide_build_manager_action_cancel },
+    { "clean", ide_build_manager_action_clean },
+    { "rebuild", ide_build_manager_action_rebuild },
+  };
 
   IDE_ENTRY;
 
-  g_assert (IDE_IS_BUILDER (builder));
-  g_assert (G_IS_TASK (task));
-
-  self = g_task_get_source_object (task);
-  build_result = ide_builder_build_finish (builder, result, &error);
-
-  g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (!build_result || IDE_IS_BUILD_RESULT (build_result));
-
-  if (self->build_result != NULL)
-    g_signal_emit (self, signals [BUILD_FINISHED], 0, self->build_result);
+  self->actions = G_ACTION_GROUP (g_simple_action_group_new ());
 
-  if (build_result == NULL)
-    {
-      IDE_TRACE_MSG ("%s", error->message);
-      g_task_return_error (task, error);
-      IDE_GOTO (failure);
-    }
-
-  g_task_return_boolean (task, TRUE);
+  g_action_map_add_action_entries (G_ACTION_MAP (self->actions),
+                                   actions,
+                                   G_N_ELEMENTS (actions),
+                                   self);
 
-failure:
   IDE_EXIT;
 }
 
-static void
-ide_build_manager_build_save_all_cb (GObject      *object,
-                                     GAsyncResult *result,
-                                     gpointer      user_data)
+/**
+ * ide_build_manager_get_busy:
+ * @self: An #IdeBuildManager
+ *
+ * Gets if the #IdeBuildManager is currently busy building the
+ * project.
+ *
+ * See #IdeBuildManager:busy for more information.
+ */
+gboolean
+ide_build_manager_get_busy (IdeBuildManager *self)
 {
-  IdeBufferManager *buffer_manager = (IdeBufferManager *)object;
-  g_autoptr(IdeBuildResult) build_result = NULL;
-  g_autoptr(GError) error = NULL;
-  g_autoptr(GTask) task = user_data;
-  IdeBuildManager *self = NULL;
-  GCancellable *cancellable;
-  BuildState *state;
+  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), FALSE);
 
-  IDE_ENTRY;
+  if G_LIKELY (self->pipeline != NULL)
+    return ide_build_pipeline_get_busy (self->pipeline);
 
-  g_assert (IDE_IS_BUFFER_MANAGER (buffer_manager));
-  g_assert (G_IS_ASYNC_RESULT (result));
-  g_assert (G_IS_TASK (task));
+  return FALSE;
+}
 
-  if (!ide_buffer_manager_save_all_finish (buffer_manager, result, &error))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      IDE_GOTO (failure);
-    }
+/**
+ * ide_build_manager_get_message:
+ * @self: An #IdeBuildManager
+ *
+ * This function returns the current build message as a string.
+ *
+ * See #IdeBuildManager:message for more information.
+ *
+ * Returns: (transfer full): A string containing the build message or %NULL
+ */
+gchar *
+ide_build_manager_get_message (IdeBuildManager *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), NULL);
 
-  self = g_task_get_source_object (task);
-  g_assert (IDE_IS_BUILD_MANAGER (self));
+  if G_LIKELY (self->pipeline != NULL)
+    return ide_build_pipeline_get_message (self->pipeline);
 
-  state = g_task_get_task_data (task);
-  g_assert (state != NULL);
-  g_assert (IDE_IS_BUILDER (state->builder));
+  return NULL;
+}
 
-  cancellable = g_task_get_cancellable (task);
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+/**
+ * ide_build_manager_get_last_build_time:
+ * @self: An #IdeBuildManager
+ *
+ * This function returns a #GDateTime of the last build request. If
+ * there has not yet been a build request, this will return %NULL.
+ *
+ * See #IdeBuildManager:last-build-time for more information.
+ *
+ * Returns: (nullable) (transfer none): A #GDateTime or %NULL.
+ */
+GDateTime *
+ide_build_manager_get_last_build_time (IdeBuildManager *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), NULL);
 
-  ide_builder_build_async (state->builder,
-                           state->build_flags,
-                           &build_result,
-                           cancellable,
-                           ide_build_manager_build_cb,
-                           g_steal_pointer (&task));
+  return self->last_build_time;
+}
 
-  ide_build_manager_set_build_result (self, build_result);
+/**
+ * ide_build_manager_get_running_time:
+ *
+ * Gets the amount of elapsed time of the current build as a
+ * #GTimeSpan.
+ *
+ * Returns: A #GTimeSpan containing the elapsed time of the build.
+ */
+GTimeSpan
+ide_build_manager_get_running_time (IdeBuildManager *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), 0);
 
-failure:
-  if (self != NULL)
+  if (self->last_build_time != NULL)
     {
-      self->saving = FALSE;
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+      g_autoptr(GDateTime) now = g_date_time_new_now_local ();
+
+      return g_date_time_difference (now, self->last_build_time);
     }
 
-  IDE_EXIT;
+  return 0;
 }
 
+/**
+ * ide_build_manager_cancel:
+ * @self: An #IdeBuildManager
+ *
+ * This function will cancel any in-flight builds.
+ *
+ * You may also activate this using the "cancel" #GAction provided
+ * by the #GActionGroup interface.
+ */
 void
-ide_build_manager_build_async (IdeBuildManager      *self,
-                               IdeBuildTarget       *build_target,
-                               IdeBuilderBuildFlags  build_flags,
-                               GCancellable         *cancellable,
-                               GAsyncReadyCallback   callback,
-                               gpointer              user_data)
+ide_build_manager_cancel (IdeBuildManager *self)
 {
-  g_autoptr(GTask) task = NULL;
-  g_autoptr(GCancellable) local_cancellable = NULL;
-  g_autoptr(GError) error = NULL;
-  g_autoptr(IdeBuilder) builder = NULL;
-  IdeBufferManager *buffer_manager;
-  IdeContext *context;
-  BuildState *state;
-
   IDE_ENTRY;
 
   g_return_if_fail (IDE_IS_BUILD_MANAGER (self));
-  g_return_if_fail (!build_target || IDE_IS_BUILD_TARGET (build_target));
-  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  if (cancellable == NULL)
-    cancellable = local_cancellable = g_cancellable_new ();
-
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_set_source_tag (task, ide_build_manager_build_async);
 
-  if (ide_build_manager_check_busy (self, &error))
+  if (self->cancellable != NULL)
     {
-      g_task_return_error (task, g_steal_pointer (&error));
-      IDE_EXIT;
-    }
+      g_autoptr(GCancellable) cancellable = g_steal_pointer (&self->cancellable);
 
-  if (NULL == (builder = ide_build_manager_get_builder (self, &error)))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      IDE_EXIT;
+      if (!g_cancellable_is_cancelled (cancellable))
+        g_cancellable_cancel (cancellable);
     }
 
-  state = g_slice_new0 (BuildState);
-  state->builder = g_steal_pointer (&builder);
-  state->build_flags = build_flags;
-  g_task_set_task_data (task, state, build_state_free);
-
-  g_set_object (&self->cancellable, cancellable);
-
-  /*
-   * Before we start any builds, we want to ensure that all of our buffers
-   * have been saved. So first request that the buffer manager take care
-   * of that for us.
-   */
-  self->saving = TRUE;
-  context = ide_object_get_context (IDE_OBJECT (self));
-  buffer_manager = ide_context_get_buffer_manager (context);
-  ide_buffer_manager_save_all_async (buffer_manager,
-                                     cancellable,
-                                     ide_build_manager_build_save_all_cb,
-                                     g_steal_pointer (&task));
-
-  /*
-   * Update our last build time.
-   */
-  g_clear_pointer (&self->last_build_time, g_date_time_unref);
-  self->last_build_time = g_date_time_new_now_local ();
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_LAST_BUILD_TIME]);
-
   IDE_EXIT;
 }
 
-gboolean
-ide_build_manager_build_finish (IdeBuildManager  *self,
-                                GAsyncResult     *result,
-                                GError          **error)
+/**
+ * ide_build_manager_get_pipeline:
+ * @self: An #IdeBuildManager
+ *
+ * This function gets the current build pipeline. The pipeline will be
+ * reloaded as build configurations change.
+ *
+ * Returns: (transfer none) (nullable): An #IdeBuildPipeline.
+ */
+IdeBuildPipeline *
+ide_build_manager_get_pipeline (IdeBuildManager *self)
 {
-  gboolean ret;
-
-  IDE_ENTRY;
-
-  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), FALSE);
-  g_return_val_if_fail (G_IS_TASK (result), FALSE);
-  g_return_val_if_fail (g_task_is_valid (G_TASK (result), self), FALSE);
-
-  ret = g_task_propagate_boolean (G_TASK (result), error);
+  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), NULL);
 
-  IDE_RETURN (ret);
+  return self->pipeline;
 }
 
 static void
-ide_build_manager_install_cb (GObject      *object,
+ide_build_manager_execute_cb (GObject      *object,
                               GAsyncResult *result,
                               gpointer      user_data)
 {
-  IdeBuilder *builder = (IdeBuilder *)object;
-  g_autoptr(IdeBuildResult) build_result = NULL;
-  g_autoptr(GTask) task = user_data;
+  IdeBuildPipeline *pipeline = (IdeBuildPipeline *)object;
   IdeBuildManager *self;
-  GError *error = NULL;
-
-  IDE_ENTRY;
-
-  g_assert (IDE_IS_BUILDER (builder));
-
-  self = g_task_get_source_object (task);
-  build_result = ide_builder_install_finish (builder, result, &error);
-
-  g_assert (IDE_IS_BUILD_MANAGER (self));
-  g_assert (!build_result || IDE_IS_BUILD_RESULT (build_result));
-
-  if (self->build_result != NULL)
-    g_signal_emit (self, signals [BUILD_FINISHED], 0, self->build_result);
-
-  if (build_result == NULL)
-    {
-      g_task_return_error (task, error);
-      IDE_GOTO (failure);
-    }
-
-  g_task_return_boolean (task, TRUE);
-
-failure:
-  IDE_EXIT;
-}
-
-static void
-ide_build_manager_install_save_all_cb (GObject      *object,
-                                       GAsyncResult *result,
-                                       gpointer      user_data)
-{
-  IdeBufferManager *buffer_manager = (IdeBufferManager *)object;
-  g_autoptr(IdeBuildResult) build_result = NULL;
-  g_autoptr(GError) error = NULL;
   g_autoptr(GTask) task = user_data;
-  IdeBuildManager *self = NULL;
-  GCancellable *cancellable;
-  BuildState *state;
+  g_autoptr(GError) error = NULL;
 
   IDE_ENTRY;
 
-  g_assert (IDE_IS_BUFFER_MANAGER (buffer_manager));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
   g_assert (G_IS_ASYNC_RESULT (result));
   g_assert (G_IS_TASK (task));
 
-  if (!ide_buffer_manager_save_all_finish (buffer_manager, result, &error))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      IDE_GOTO (failure);
-    }
-
   self = g_task_get_source_object (task);
   g_assert (IDE_IS_BUILD_MANAGER (self));
 
-  state = g_task_get_task_data (task);
-  g_assert (state != NULL);
-  g_assert (IDE_IS_BUILDER (state->builder));
-
-  cancellable = g_task_get_cancellable (task);
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  /*
-   * We might be able to save some build time if we can limit the target
-   * that needs to be installed. However, it's unclear that we want that
-   * because it could result in incomplete installation unless the build
-   * system compensates for it.
-   */
-
-  ide_builder_install_async (state->builder,
-                             &build_result,
-                             cancellable,
-                             ide_build_manager_install_cb,
-                             g_steal_pointer (&task));
-
-  ide_build_manager_set_build_result (self, build_result);
-
-failure:
-  if (self != NULL)
+  if (!ide_build_pipeline_execute_finish (pipeline, result, &error))
+    {
+      g_task_return_error (task, g_steal_pointer (&error));
+      g_signal_emit (self, signals [BUILD_FAILED], 0, pipeline);
+    }
+  else
     {
-      self->saving = FALSE;
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+      g_task_return_boolean (task, TRUE);
+      g_signal_emit (self, signals [BUILD_FINISHED], 0, pipeline);
     }
 
   IDE_EXIT;
 }
 
+/**
+ * ide_build_manager_execute_async:
+ * @self: An #IdeBuildManager
+ * @phase: An #IdeBuildPhase or 0
+ * @cancellable: (nullable): A #GCancellable or %NULL
+ * @callback: A callback to execute upon completion
+ * @user_data: user data for @callback
+ *
+ * This function will request that @phase is completed in the underlying
+ * build pipeline and execute a build. Upon completion, @callback will be
+ * executed and it can determine the success or failure of the operation
+ * using ide_build_manager_execute_finish().
+ */
 void
-ide_build_manager_install_async (IdeBuildManager     *self,
+ide_build_manager_execute_async (IdeBuildManager     *self,
+                                 IdeBuildPhase        phase,
                                  GCancellable        *cancellable,
                                  GAsyncReadyCallback  callback,
                                  gpointer             user_data)
 {
   g_autoptr(GTask) task = NULL;
-  g_autoptr(IdeBuilder) builder = NULL;
-  g_autoptr(GError) error = NULL;
-  IdeBufferManager *buffer_manager;
-  IdeContext *context;
-  BuildState *state;
 
   IDE_ENTRY;
 
@@ -818,46 +639,47 @@ ide_build_manager_install_async (IdeBuildManager     *self,
   g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
 
   task = g_task_new (self, cancellable, callback, user_data);
-  g_task_set_source_tag (task, ide_build_manager_install_async);
+  g_task_set_source_tag (task, ide_build_manager_execute_async);
 
-  if (ide_build_manager_check_busy (self, &error))
+  if (self->pipeline == NULL || ide_build_pipeline_get_busy (self->pipeline))
     {
-      g_task_return_error (task, g_steal_pointer (&error));
+      g_task_return_new_error (task,
+                               G_IO_ERROR,
+                               G_IO_ERROR_PENDING,
+                               "Cannot execute pipeline, it has not yet been prepared");
       IDE_EXIT;
     }
 
-  if (NULL == (builder = ide_build_manager_get_builder (self, &error)))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      IDE_EXIT;
-    }
+  ide_build_pipeline_request_phase (self->pipeline, phase);
 
-  state = g_slice_new0 (BuildState);
-  state->builder = g_steal_pointer (&builder);
-  g_task_set_task_data (task, state, build_state_free);
   g_set_object (&self->cancellable, cancellable);
 
-  /* Save the buffers before starting the build. */
-  self->saving = TRUE;
-  context = ide_object_get_context (IDE_OBJECT (self));
-  buffer_manager = ide_context_get_buffer_manager (context);
-  ide_buffer_manager_save_all_async (buffer_manager,
-                                     cancellable,
-                                     ide_build_manager_install_save_all_cb,
-                                     g_steal_pointer (&task));
-
-  /*
-   * Update our last build time.
-   */
-  g_clear_pointer (&self->last_build_time, g_date_time_unref);
-  self->last_build_time = g_date_time_new_now_local ();
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_LAST_BUILD_TIME]);
+  self->diagnostic_count = 0;
+
+  g_signal_emit (self, signals [BUILD_STARTED], 0, self->pipeline);
+
+  ide_build_pipeline_execute_async (self->pipeline,
+                                    cancellable,
+                                    ide_build_manager_execute_cb,
+                                    g_steal_pointer (&task));
+
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_HAS_DIAGNOSTICS]);
 
   IDE_EXIT;
 }
 
+/**
+ * ide_build_manager_execute_finish:
+ * @self: An #IdeBuildManager
+ * @result: A #GAsyncResult
+ * @error: A location for a #GError or %NULL
+ *
+ * Completes a request to ide_build_manager_execute_async().
+ *
+ * Returns: %TRUE if successful, otherwise %FALSE and @error is set.
+ */
 gboolean
-ide_build_manager_install_finish (IdeBuildManager  *self,
+ide_build_manager_execute_finish (IdeBuildManager  *self,
                                   GAsyncResult     *result,
                                   GError          **error)
 {
@@ -867,79 +689,12 @@ ide_build_manager_install_finish (IdeBuildManager  *self,
 
   g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), FALSE);
   g_return_val_if_fail (G_IS_TASK (result), FALSE);
-  g_return_val_if_fail (g_task_is_valid (G_TASK (result), self), FALSE);
 
   ret = g_task_propagate_boolean (G_TASK (result), error);
 
   IDE_RETURN (ret);
 }
 
-gboolean
-ide_build_manager_get_busy (IdeBuildManager *self)
-{
-  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), FALSE);
-
-  if (self->saving)
-    return TRUE;
-
-  if (self->build_result != NULL)
-    return ide_build_result_get_running (self->build_result);
-
-  return FALSE;
-}
-
-void
-ide_build_manager_cancel (IdeBuildManager *self)
-{
-  IDE_ENTRY;
-
-  g_return_if_fail (IDE_IS_BUILD_MANAGER (self));
-
-  if (self->cancellable != NULL)
-    g_cancellable_cancel (self->cancellable);
-
-  IDE_EXIT;
-}
-
-gchar *
-ide_build_manager_get_message (IdeBuildManager *self)
-{
-  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), NULL);
-
-  if (self->build_result != NULL)
-    return ide_build_result_get_mode (self->build_result);
-
-  return g_strdup (_("Ready"));
-}
-
-/**
- * ide_build_manager_get_last_build_time:
- * @self: An #IdeBuildManager
- *
- * Gets the time the last build was started. This is %NULL until a build
- * has been executed in the context.
- *
- * Returns: (nullable) (transfer none): A #GDateTime or %NULL.
- */
-GDateTime *
-ide_build_manager_get_last_build_time (IdeBuildManager *self)
-{
-  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), NULL);
-
-  return self->last_build_time;
-}
-
-GTimeSpan
-ide_build_manager_get_running_time (IdeBuildManager *self)
-{
-  g_return_val_if_fail (IDE_IS_BUILD_MANAGER (self), 0);
-
-  if (self->build_result == NULL)
-    return 0;
-
-  return ide_build_result_get_running_time (self->build_result);
-}
-
 static gchar **
 ide_build_manager_list_actions (GActionGroup *action_group)
 {
diff --git a/libide/buildsystem/ide-build-manager.h b/libide/buildsystem/ide-build-manager.h
index ffec27e..f2173a2 100644
--- a/libide/buildsystem/ide-build-manager.h
+++ b/libide/buildsystem/ide-build-manager.h
@@ -23,7 +23,7 @@
 
 #include "ide-object.h"
 
-#include "buildsystem/ide-builder.h"
+#include "buildsystem/ide-build-pipeline.h"
 
 G_BEGIN_DECLS
 
@@ -31,27 +31,20 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (IdeBuildManager, ide_build_manager, IDE, BUILD_MANAGER, IdeObject)
 
-gboolean   ide_build_manager_get_busy            (IdeBuildManager       *self);
-gchar     *ide_build_manager_get_message         (IdeBuildManager       *self);
-GDateTime *ide_build_manager_get_last_build_time (IdeBuildManager       *self);
-GTimeSpan  ide_build_manager_get_running_time    (IdeBuildManager       *self);
-void       ide_build_manager_cancel              (IdeBuildManager       *self);
-void       ide_build_manager_build_async         (IdeBuildManager       *self,
-                                                  IdeBuildTarget        *build_target,
-                                                  IdeBuilderBuildFlags   build_flags,
-                                                  GCancellable          *cancellable,
-                                                  GAsyncReadyCallback    callback,
-                                                  gpointer               user_data);
-gboolean   ide_build_manager_build_finish        (IdeBuildManager       *self,
-                                                  GAsyncResult          *result,
-                                                  GError               **error);
-void       ide_build_manager_install_async       (IdeBuildManager       *self,
-                                                  GCancellable          *cancellable,
-                                                  GAsyncReadyCallback    callback,
-                                                  gpointer               user_data);
-gboolean   ide_build_manager_install_finish      (IdeBuildManager       *self,
-                                                  GAsyncResult          *result,
-                                                  GError               **error);
+gboolean          ide_build_manager_get_busy            (IdeBuildManager       *self);
+gchar            *ide_build_manager_get_message         (IdeBuildManager       *self);
+GDateTime        *ide_build_manager_get_last_build_time (IdeBuildManager       *self);
+GTimeSpan         ide_build_manager_get_running_time    (IdeBuildManager       *self);
+void              ide_build_manager_cancel              (IdeBuildManager       *self);
+IdeBuildPipeline *ide_build_manager_get_pipeline        (IdeBuildManager       *self);
+void              ide_build_manager_execute_async       (IdeBuildManager       *self,
+                                                         IdeBuildPhase          phase,
+                                                         GCancellable          *cancellable,
+                                                         GAsyncReadyCallback    callback,
+                                                         gpointer               user_data);
+gboolean          ide_build_manager_execute_finish      (IdeBuildManager       *self,
+                                                         GAsyncResult          *result,
+                                                         GError               **error);
 
 G_END_DECLS
 
diff --git a/libide/buildsystem/ide-build-pipeline-addin.c b/libide/buildsystem/ide-build-pipeline-addin.c
new file mode 100644
index 0000000..df9ca67
--- /dev/null
+++ b/libide/buildsystem/ide-build-pipeline-addin.c
@@ -0,0 +1,109 @@
+/* ide-build-pipeline-addin.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-pipeline-addin"
+
+#include "ide-context.h"
+
+#include "buildsystem/ide-build-pipeline-addin.h"
+
+G_DEFINE_INTERFACE (IdeBuildPipelineAddin, ide_build_pipeline_addin, G_TYPE_OBJECT)
+
+static void
+ide_build_pipeline_addin_default_init (IdeBuildPipelineAddinInterface *iface)
+{
+  g_object_interface_install_property (iface,
+                                       g_param_spec_object ("context",
+                                                            NULL,
+                                                            NULL,
+                                                            IDE_TYPE_CONTEXT,
+                                                            (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | 
G_PARAM_STATIC_STRINGS)));
+}
+
+void
+ide_build_pipeline_addin_load (IdeBuildPipelineAddin *self,
+                               IdeBuildPipeline      *pipeline)
+{
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE_ADDIN (self));
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  if (IDE_BUILD_PIPELINE_ADDIN_GET_IFACE (self)->load)
+    IDE_BUILD_PIPELINE_ADDIN_GET_IFACE (self)->load (self, pipeline);
+}
+
+void
+ide_build_pipeline_addin_unload (IdeBuildPipelineAddin *self,
+                                 IdeBuildPipeline      *pipeline)
+{
+  GArray *ar;
+
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE_ADDIN (self));
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  if (IDE_BUILD_PIPELINE_ADDIN_GET_IFACE (self)->unload)
+    IDE_BUILD_PIPELINE_ADDIN_GET_IFACE (self)->unload (self, pipeline);
+
+  /* Unload any stages that are tracked by the addin */
+  ar = g_object_get_data (G_OBJECT (self), "IDE_BUILD_PIPELINE_ADDIN_STAGES");
+
+  if G_LIKELY (ar != NULL)
+    {
+      for (guint i = 0; i < ar->len; i++)
+        {
+          guint stage_id = g_array_index (ar, guint, i);
+
+          ide_build_pipeline_disconnect (pipeline, stage_id);
+        }
+    }
+}
+
+/**
+ * ide_build_pipeline_addin_track:
+ * @self: An #IdeBuildPipelineAddin
+ * @stage_id: a stage id returned from ide_build_pipeline_connect()
+ *
+ * This function will track the stage_id that was returned from
+ * ide_build_pipeline_connect() or similar functions. Doing so results in
+ * the stage being automatically disconnected when the addin is unloaded.
+ *
+ * This means that many #IdeBuildPipelineAddin implementations do not need
+ * an unload vfunc if they track all registered stages.
+ *
+ * You should not mix this function with manual pipeline disconnections.
+ * While it should work, that is not yet guaranteed.
+ */
+void
+ide_build_pipeline_addin_track (IdeBuildPipelineAddin *self,
+                                guint                  stage_id)
+{
+  GArray *ar;
+
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE_ADDIN (self));
+  g_return_if_fail (stage_id > 0);
+
+  ar = g_object_get_data (G_OBJECT (self), "IDE_BUILD_PIPELINE_ADDIN_STAGES");
+
+  if (ar == NULL)
+    {
+      ar = g_array_new (FALSE, FALSE, sizeof (guint));
+      g_object_set_data_full (G_OBJECT (self), "IDE_BUILD_PIPELINE_ADDIN_STAGES",
+                              ar, (GDestroyNotify)g_array_unref);
+    }
+
+  g_array_append_val (ar, stage_id);
+}
diff --git a/libide/buildsystem/ide-build-pipeline-addin.h b/libide/buildsystem/ide-build-pipeline-addin.h
new file mode 100644
index 0000000..b182ddd
--- /dev/null
+++ b/libide/buildsystem/ide-build-pipeline-addin.h
@@ -0,0 +1,51 @@
+/* ide-build-pipeline-addin.h
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_BUILD_PIPELINE_ADDIN_H
+#define IDE_BUILD_PIPELINE_ADDIN_H
+
+#include <gio/gio.h>
+
+#include "ide-build-pipeline.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_BUILD_PIPELINE_ADDIN (ide_build_pipeline_addin_get_type())
+
+G_DECLARE_INTERFACE (IdeBuildPipelineAddin, ide_build_pipeline_addin, IDE, BUILD_PIPELINE_ADDIN, GObject)
+
+struct _IdeBuildPipelineAddinInterface
+{
+  GTypeInterface type_interface;
+
+  void (*load)   (IdeBuildPipelineAddin *self,
+                  IdeBuildPipeline      *pipeline);
+  void (*unload) (IdeBuildPipelineAddin *self,
+                  IdeBuildPipeline      *pipeline);
+};
+
+void ide_build_pipeline_addin_load   (IdeBuildPipelineAddin *self,
+                                      IdeBuildPipeline      *pipeline);
+void ide_build_pipeline_addin_unload (IdeBuildPipelineAddin *self,
+                                      IdeBuildPipeline      *pipeline);
+void ide_build_pipeline_addin_track  (IdeBuildPipelineAddin *self,
+                                      guint                  stage_id);
+
+G_END_DECLS
+
+#endif /* IDE_BUILD_PIPELINE_ADDIN_H */
diff --git a/libide/buildsystem/ide-build-pipeline.c b/libide/buildsystem/ide-build-pipeline.c
new file mode 100644
index 0000000..8eecabb
--- /dev/null
+++ b/libide/buildsystem/ide-build-pipeline.c
@@ -0,0 +1,1620 @@
+/* ide-build-pipeline.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-pipeline"
+
+#include <egg-counter.h>
+#include <libpeas/peas.h>
+#include <string.h>
+
+#include "ide-context.h"
+#include "ide-debug.h"
+#include "ide-enums.h"
+#include "ide-macros.h"
+
+#include "application/ide-application.h"
+#include "buildsystem/ide-build-log.h"
+#include "buildsystem/ide-build-log-private.h"
+#include "buildsystem/ide-build-pipeline.h"
+#include "buildsystem/ide-build-pipeline-addin.h"
+#include "buildsystem/ide-build-stage.h"
+#include "buildsystem/ide-build-stage-launcher.h"
+#include "buildsystem/ide-build-stage-private.h"
+#include "diagnostics/ide-diagnostic.h"
+#include "diagnostics/ide-source-location.h"
+#include "diagnostics/ide-source-range.h"
+#include "projects/ide-project.h"
+#include "runtimes/ide-runtime.h"
+#include "vcs/ide-vcs.h"
+
+EGG_DEFINE_COUNTER (Instances, "Pipeline", "N Pipelines", "Number of Pipeline instances")
+
+/**
+ * SECTION:ide-build-pipeline
+ * @title: IdeBuildPipeline
+ * @short_description: Pluggable build pipeline
+ *
+ * The #IdeBuildPipeline is responsible for managing the build process
+ * for Builder. It consists of multiple build "phases" (see #IdeBuildPhase
+ * for the individual phases). An #IdeBuildStage can be attached with
+ * a priority to each phase and is the primary mechanism that plugins
+ * use to perform their operations in the proper ordering.
+ *
+ * For example, the flatpak plugin provides its download stage as part of the
+ * %IDE_BUILD_PHASE_DOWNLOAD phase. The autotools plugin provides stages to
+ * phases such as %IDE_BUILD_PHASE_AUTOGEN, %IDE_BUILD_PHASE_CONFIGURE,
+ * %IDE_BUILD_PHASE_BUILD, and %IDE_BUILD_PHASE_INSTALL.
+ *
+ * If you want ensure a particular phase is performed as part of a build,
+ * then fall ide_build_pipeline_request_phase() with the phase you are
+ * interested in seeing complete successfully.
+ *
+ * If your plugin has discovered that something has changed that invalidates a
+ * given phase, use ide_build_pipeline_invalidate_phase() to ensure that the
+ * phase is re-executed the next time a requested phase of higher precidence
+ * is requested.
+ *
+ * It can be useful to perform operations before or after a given stage (but
+ * still be executed as part of that stage) so the %IDE_BUILD_PHASE_BEFORE and
+ * %IDE_BUILD_PHASE_AFTER flags may be xor'd with the requested phase.  If more
+ * precise ordering is required, you may use the priority parameter to order
+ * the operation with regards to other stages in that phase.
+ *
+ * Transient stages may be added to the pipeline and they will be removed after
+ * the ide_build_pipeline_execute_async() operation has completed successfully
+ * or has failed. You can mark a stage as trandient with
+ * ide_build_stage_set_transient(). This may be useful to perform operations
+ * such as an "export tarball" stage which should only run once as determined
+ * by the user requesting a "make dist" style operation.
+ */
+
+typedef struct
+{
+  guint          id;
+  IdeBuildPhase  phase;
+  gint           priority;
+  IdeBuildStage *stage;
+} PipelineEntry;
+
+typedef struct
+{
+  guint   id;
+  GRegex *regex;
+} ErrorFormat;
+
+struct _IdeBuildPipeline
+{
+  IdeObject         parent_instance;
+
+  /*
+   * These are our extensions to the BuildPipeline. Plugins insert
+   * them and they might go about adding stages to the pipeline,
+   * add error formats, or just monitor logs.
+   */
+  PeasExtensionSet *addins;
+
+  /*
+   * This is the configuration for the build. It is a snapshot of
+   * the real configuration so that we do not need to synchronize
+   * with the UI process for accesses.
+   */
+  IdeConfiguration *configuration;
+
+  /*
+   * The IdeBuildLog is a private implementation that we use to
+   * log things from addins via observer callbacks.
+   */
+  IdeBuildLog *log;
+
+  /*
+   * These are our builddir/srcdir paths. Useful for building paths
+   * by addins. We try to create a new builddir that will be unique
+   * based on hashing of the configuration.
+   */
+  gchar *builddir;
+  gchar *srcdir;
+
+  /*
+   * This is an array of PipelineEntry, which contain information we
+   * need about the stage and an identifier that addins can use to
+   * remove their inserted stages.
+   */
+  GArray *pipeline;
+
+  /*
+   * This are used for ErrorFormat registration so that we have a
+   * single place to extract "GCC-style" warnings and errors. Other
+   * languages can also register these so they show up in the build
+   * errors panel.
+   */
+  GArray *errfmts;
+  gchar  *errfmt_current_dir;
+  gchar  *errfmt_top_dir;
+  guint  errfmt_seqnum;
+
+  /*
+   * No reference to the current stage. It is only available during
+   * the asynchronous execution of the stage.
+   */
+  IdeBuildStage *current_stage;
+
+  /*
+   * The index of our current PipelineEntry. This should start at -1
+   * to indicate that no stage is currently active.
+   */
+  gint position;
+
+  /*
+   * This is the requested mask to be built. It should be reset after
+   * performing a build so that a followup execute_async() would be
+   * innocuous.
+   */
+  IdeBuildPhase requested_mask;
+
+  /*
+   * We use this sequence number to give PipelineEntry instances a
+   * unique identifier. The addins can use this to remove their
+   * inserted build stages.
+   */
+  guint seqnum;
+
+  /*
+   * If we failed to build, this should be set.
+   */
+  guint failed : 1;
+
+  /*
+   * If we are within a built, this should be set.
+   */
+  guint busy : 1;
+};
+
+static void ide_build_pipeline_tick (IdeBuildPipeline *self,
+                                     GTask            *task);
+
+G_DEFINE_TYPE (IdeBuildPipeline, ide_build_pipeline, IDE_TYPE_OBJECT)
+
+enum {
+  PROP_0,
+  PROP_BUSY,
+  PROP_CONFIGURATION,
+  PROP_PHASE,
+  N_PROPS
+};
+
+enum {
+  DIAGNOSTIC,
+  STARTED,
+  FINISHED,
+  N_SIGNALS
+};
+
+static GParamSpec *properties [N_PROPS];
+static guint signals [N_SIGNALS];
+
+static void
+clear_error_format (gpointer data)
+{
+  ErrorFormat *errfmt = data;
+
+  errfmt->id = 0;
+  g_clear_pointer (&errfmt->regex, g_regex_unref);
+}
+
+static IdeDiagnosticSeverity
+parse_severity (const gchar *str)
+{
+  g_autofree gchar *lower = NULL;
+
+  if (str == NULL)
+    return IDE_DIAGNOSTIC_WARNING;
+
+  lower = g_utf8_strdown (str, -1);
+
+  if (strstr (lower, "fatal") != NULL)
+    return IDE_DIAGNOSTIC_FATAL;
+
+  if (strstr (lower, "error") != NULL)
+    return IDE_DIAGNOSTIC_ERROR;
+
+  if (strstr (lower, "warning") != NULL)
+    return IDE_DIAGNOSTIC_WARNING;
+
+  if (strstr (lower, "ignored") != NULL)
+    return IDE_DIAGNOSTIC_IGNORED;
+
+  if (strstr (lower, "deprecated") != NULL)
+    return IDE_DIAGNOSTIC_DEPRECATED;
+
+  if (strstr (lower, "note") != NULL)
+    return IDE_DIAGNOSTIC_NOTE;
+
+  return IDE_DIAGNOSTIC_WARNING;
+}
+
+static IdeDiagnostic *
+create_diagnostic (IdeBuildPipeline *self,
+                   GMatchInfo       *match_info)
+{
+  g_autofree gchar *filename = NULL;
+  g_autofree gchar *line = NULL;
+  g_autofree gchar *column = NULL;
+  g_autofree gchar *message = NULL;
+  g_autofree gchar *level = NULL;
+  g_autoptr(IdeFile) file = NULL;
+  g_autoptr(IdeSourceLocation) location = NULL;
+  IdeContext *context;
+  struct {
+    gint64 line;
+    gint64 column;
+    IdeDiagnosticSeverity severity;
+  } parsed = { 0 };
+
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+  g_assert (match_info != NULL);
+
+  message = g_match_info_fetch_named (match_info, "message");
+
+  /* XXX: This is a hack to ignore a common but unuseful error message.
+   *      This really belongs somewhere else, but its faster to do the
+   *      check here.
+   */
+  if (message == NULL || strncmp (message, "#warning _FORTIFY_SOURCE requires compiling with optimization", 
61) == 0)
+    return NULL;
+
+  filename = g_match_info_fetch_named (match_info, "filename");
+  line = g_match_info_fetch_named (match_info, "line");
+  column = g_match_info_fetch_named (match_info, "column");
+  level = g_match_info_fetch_named (match_info, "level");
+
+  if (line != NULL)
+    {
+      parsed.line = g_ascii_strtoll (line, NULL, 10);
+      if (parsed.line < 1 || parsed.line > G_MAXINT32)
+        return NULL;
+      parsed.line--;
+    }
+
+  if (column != NULL)
+    {
+      parsed.column = g_ascii_strtoll (column, NULL, 10);
+      if (parsed.column < 1 || parsed.column > G_MAXINT32)
+        return NULL;
+      parsed.column--;
+    }
+
+  parsed.severity = parse_severity (level);
+
+  if (!g_path_is_absolute (filename) && self->errfmt_current_dir != NULL)
+    {
+      const gchar *basedir = self->errfmt_current_dir;
+      gchar *path;
+
+      if (g_str_has_prefix (basedir, self->errfmt_top_dir))
+        {
+          basedir += strlen (self->errfmt_top_dir);
+          if (*basedir == '/')
+            basedir++;
+        }
+
+      path = g_build_filename (basedir, filename, NULL);
+      g_free (filename);
+      filename = path;
+    }
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+
+  if (!g_path_is_absolute (filename))
+    {
+      g_autoptr(GFile) child = NULL;
+      IdeVcs *vcs;
+      GFile *workdir;
+      gchar *path;
+
+      vcs = ide_context_get_vcs (context);
+      workdir = ide_vcs_get_working_directory (vcs);
+
+      child = g_file_get_child (workdir, filename);
+      path = g_file_get_path (child);
+
+      g_free (filename);
+      filename = path;
+    }
+
+  file = ide_file_new_for_path (context, filename);
+  location = ide_source_location_new (file, parsed.line, parsed.column, 0);
+
+  return ide_diagnostic_new (parsed.severity, message, location);
+}
+
+static void
+ide_build_pipeline_log_observer (IdeBuildLogStream  stream,
+                                 const gchar       *message,
+                                 gssize             message_len,
+                                 gpointer           user_data)
+{
+  IdeBuildPipeline *self = user_data;
+  const gchar *enterdir;
+
+  g_assert (stream == IDE_BUILD_LOG_STDOUT || stream == IDE_BUILD_LOG_STDERR);
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+  g_assert (message != NULL);
+
+#define ENTERING_DIRECTORY_BEGIN "Entering directory '"
+#define ENTERING_DIRECTORY_END   "'\n"
+
+  if (message_len < 0)
+    message_len = strlen (message);
+
+  if (self->log != NULL)
+    ide_build_log_observer (stream, message, message_len, self->log);
+
+  /*
+   * This expects LANG=C, which is defined in the autotools Builder.
+   * Not the most ideal decoupling of logic, but we don't have a whole
+   * lot to work with here.
+   */
+  if (NULL != (enterdir = strstr (message, ENTERING_DIRECTORY_BEGIN)) &&
+      g_str_has_suffix (enterdir, ENTERING_DIRECTORY_END))
+    {
+      gssize len;
+
+      enterdir += IDE_LITERAL_LENGTH (ENTERING_DIRECTORY_BEGIN);
+      len = strlen (enterdir) - IDE_LITERAL_LENGTH (ENTERING_DIRECTORY_END);
+
+      if (len > 0)
+        {
+          g_free (self->errfmt_current_dir);
+          self->errfmt_current_dir = g_strndup (enterdir, len);
+          if (self->errfmt_top_dir == NULL)
+            self->errfmt_top_dir = g_strndup (enterdir, len);
+        }
+
+      return;
+    }
+
+  for (guint i = 0; i < self->errfmts->len; i++)
+    {
+      const ErrorFormat *errfmt = &g_array_index (self->errfmts, ErrorFormat, i);
+      g_autoptr(GMatchInfo) match_info = NULL;
+
+      if (g_regex_match (errfmt->regex, message, 0, &match_info))
+        {
+          g_autoptr(IdeDiagnostic) diagnostic = create_diagnostic (self, match_info);
+
+          if (diagnostic != NULL)
+            {
+              ide_build_pipeline_emit_diagnostic (self, diagnostic);
+              return;
+            }
+        }
+    }
+
+#undef ENTERING_DIRECTORY_BEGIN
+#undef ENTERING_DIRECTORY_END
+}
+
+static void
+ide_build_pipeline_release_transients (IdeBuildPipeline *self)
+{
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+  g_assert (self->pipeline != NULL);
+
+  for (guint i = self->pipeline->len; i > 0; i--)
+    {
+      const PipelineEntry *entry = &g_array_index (self->pipeline, PipelineEntry, i - 1);
+
+      g_assert (IDE_IS_BUILD_STAGE (entry->stage));
+
+      if (ide_build_stage_get_transient (entry->stage))
+        g_array_remove_index (self->pipeline, i);
+    }
+}
+
+/**
+ * ide_build_pipeline_get_phase:
+ *
+ * Gets the current phase that is executing. This is only useful during
+ * execution of the pipeline.
+ */
+IdeBuildPhase
+ide_build_pipeline_get_phase (IdeBuildPipeline *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), 0);
+
+  if (self->position < 0)
+    return IDE_BUILD_PHASE_NONE;
+  else if (self->position < self->pipeline->len)
+    return g_array_index (self->pipeline, PipelineEntry, self->position).phase;
+  else if (self->failed)
+    return IDE_BUILD_PHASE_FAILED;
+  else
+    return IDE_BUILD_PHASE_FINISHED;
+}
+
+/**
+ * ide_build_pipeline_get_configuration:
+ *
+ * Gets the #IdeConfiguration to use for the pipeline.
+ *
+ * Returns: (transfer none): An #IdeConfiguration
+ */
+IdeConfiguration *
+ide_build_pipeline_get_configuration (IdeBuildPipeline *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+
+  return self->configuration;
+}
+
+static void
+clear_pipeline_entry (gpointer data)
+{
+  PipelineEntry *entry = data;
+
+  if (entry->stage != NULL)
+    {
+      ide_build_stage_set_log_observer (entry->stage, NULL, NULL, NULL);
+      g_clear_object (&entry->stage);
+    }
+}
+
+static gint
+pipeline_entry_compare (gconstpointer a,
+                        gconstpointer b)
+{
+  const PipelineEntry *entry_a = a;
+  const PipelineEntry *entry_b = b;
+  gint ret;
+
+  ret = (gint)(entry_a->phase & IDE_BUILD_PHASE_MASK)
+      - (gint)(entry_b->phase & IDE_BUILD_PHASE_MASK);
+
+  if (ret == 0)
+    {
+      gint whence_a = (entry_a->phase & IDE_BUILD_PHASE_WHENCE_MASK);
+      gint whence_b = (entry_b->phase & IDE_BUILD_PHASE_WHENCE_MASK);
+
+      if (whence_a != whence_b)
+        {
+          if (whence_a == IDE_BUILD_PHASE_BEFORE)
+            return -1;
+
+          if (whence_b == IDE_BUILD_PHASE_BEFORE)
+            return 1;
+
+          if (whence_a == 0)
+            return -1;
+
+          if (whence_b == 0)
+            return 1;
+
+          g_assert_not_reached ();
+        }
+    }
+
+  if (ret == 0)
+    ret = entry_a->priority - entry_b->priority;
+
+  return ret;
+}
+
+static void
+ide_build_pipeline_real_started (IdeBuildPipeline *self)
+{
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+}
+
+static void
+ide_build_pipeline_real_finished (IdeBuildPipeline *self,
+                                  gboolean          failed)
+{
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+
+  /*
+   * Now that the build is finished, we can aggressively drop our pipeline
+   * stages to help ensure that all references are dropped as soon as
+   * possible.
+   */
+
+  g_clear_object (&self->addins);
+}
+
+static void
+ide_build_pipeline_extension_added (PeasExtensionSet *set,
+                                    PeasPluginInfo   *plugin_info,
+                                    PeasExtension    *exten,
+                                    gpointer          user_data)
+{
+  IdeBuildPipeline *self = user_data;
+  IdeBuildPipelineAddin *addin = (IdeBuildPipelineAddin *)exten;
+
+  IDE_ENTRY;
+
+  g_assert (PEAS_IS_EXTENSION_SET (set));
+  g_assert (plugin_info != NULL);
+  g_assert (IDE_IS_BUILD_PIPELINE_ADDIN (addin));
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+
+  ide_build_pipeline_addin_load (addin, self);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_extension_removed (PeasExtensionSet *set,
+                                      PeasPluginInfo   *plugin_info,
+                                      PeasExtension    *exten,
+                                      gpointer          user_data)
+{
+  IdeBuildPipeline *self = user_data;
+  IdeBuildPipelineAddin *addin = (IdeBuildPipelineAddin *)exten;
+
+  IDE_ENTRY;
+
+  g_assert (PEAS_IS_EXTENSION_SET (set));
+  g_assert (plugin_info != NULL);
+  g_assert (IDE_IS_BUILD_PIPELINE_ADDIN (addin));
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+
+  ide_build_pipeline_addin_unload (addin, self);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_finalize (GObject *object)
+{
+  IdeBuildPipeline *self = (IdeBuildPipeline *)object;
+
+  IDE_ENTRY;
+
+  g_clear_object (&self->log);
+  g_clear_object (&self->configuration);
+  g_clear_pointer (&self->pipeline, g_array_unref);
+  g_clear_pointer (&self->srcdir, g_free);
+  g_clear_pointer (&self->builddir, g_free);
+  g_clear_pointer (&self->errfmts, g_array_unref);
+  g_clear_pointer (&self->errfmt_top_dir, g_free);
+  g_clear_pointer (&self->errfmt_current_dir, g_free);
+
+  G_OBJECT_CLASS (ide_build_pipeline_parent_class)->finalize (object);
+
+  EGG_COUNTER_DEC (Instances);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_dispose (GObject *object)
+{
+  IdeBuildPipeline *self = IDE_BUILD_PIPELINE (object);
+
+  IDE_ENTRY;
+
+  g_clear_object (&self->addins);
+
+  G_OBJECT_CLASS (ide_build_pipeline_parent_class)->dispose (object);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_constructed (GObject *object)
+{
+  IdeBuildPipeline *self = IDE_BUILD_PIPELINE (object);
+  const gchar *config_id;
+  const gchar *project_id;
+  IdeProject *project;
+  IdeContext *context;
+  IdeVcs *vcs;
+  GFile *workdir;
+
+  IDE_ENTRY;
+
+  G_OBJECT_CLASS (ide_build_pipeline_parent_class)->constructed (object);
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+
+  project = ide_context_get_project (context);
+  project_id = ide_project_get_id (project);
+
+  vcs = ide_context_get_vcs (context);
+  workdir = ide_vcs_get_working_directory (vcs);
+
+  config_id = ide_configuration_get_id (self->configuration);
+
+  self->srcdir = g_file_get_path (workdir);
+
+  self->builddir = g_build_filename (g_get_user_cache_dir (),
+                                     "gnome-builder",
+                                     "builds",
+                                     project_id,
+                                     config_id,
+                                     NULL);
+
+  self->addins = peas_extension_set_new (peas_engine_get_default (),
+                                         IDE_TYPE_BUILD_PIPELINE_ADDIN,
+                                         "context", context,
+                                         NULL);
+
+  g_signal_connect (self->addins,
+                    "extension-added",
+                    G_CALLBACK (ide_build_pipeline_extension_added),
+                    self);
+
+  g_signal_connect (self->addins,
+                    "extension-removed",
+                    G_CALLBACK (ide_build_pipeline_extension_removed),
+                    self);
+
+  peas_extension_set_foreach (self->addins,
+                              ide_build_pipeline_extension_added,
+                              self);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_get_property (GObject    *object,
+                                 guint       prop_id,
+                                 GValue     *value,
+                                 GParamSpec *pspec)
+{
+  IdeBuildPipeline *self = IDE_BUILD_PIPELINE (object);
+
+  switch (prop_id)
+    {
+    case PROP_BUSY:
+      g_value_set_boolean (value, self->busy);
+      break;
+
+    case PROP_CONFIGURATION:
+      g_value_set_object (value, ide_build_pipeline_get_configuration (self));
+      break;
+
+    case PROP_PHASE:
+      g_value_set_flags (value, ide_build_pipeline_get_phase (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_pipeline_set_property (GObject      *object,
+                                 guint         prop_id,
+                                 const GValue *value,
+                                 GParamSpec   *pspec)
+{
+  IdeBuildPipeline *self = IDE_BUILD_PIPELINE (object);
+
+  switch (prop_id)
+    {
+    case PROP_CONFIGURATION:
+      self->configuration = g_value_dup_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_pipeline_class_init (IdeBuildPipelineClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->constructed = ide_build_pipeline_constructed;
+  object_class->dispose = ide_build_pipeline_dispose;
+  object_class->finalize = ide_build_pipeline_finalize;
+  object_class->get_property = ide_build_pipeline_get_property;
+  object_class->set_property = ide_build_pipeline_set_property;
+
+  /**
+   * IdeBuildPipeline:busy:
+   *
+   * Gets the "busy" property. If %TRUE, the pipeline is busy executing.
+   */
+  properties [PROP_BUSY] =
+    g_param_spec_boolean ("busy",
+                          "Busy",
+                          "If the pipeline is busy",
+                          FALSE,
+                          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  /**
+   * IdeBuildPipeline:configuration:
+   *
+   * The configuration to use for the build pipeline.
+   */
+  properties [PROP_CONFIGURATION] =
+    g_param_spec_object ("configuration",
+                         "Configuration",
+                         "Configuration",
+                         IDE_TYPE_CONFIGURATION,
+                         (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+
+  /**
+   * IdeBuildPipeline:phase:
+   *
+   * The current build phase during execution of the pipeline.
+   */
+  properties [PROP_PHASE] =
+    g_param_spec_flags ("phase",
+                        "Phase",
+                        "The phase that is being executed",
+                        IDE_TYPE_BUILD_PHASE,
+                        IDE_BUILD_PHASE_NONE,
+                        (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+
+  /**
+   * IdeBuildPipeline::diagnostic:
+   * @self: An #IdeBuildPipeline
+   * @diagnostic: The newly created diagnostic
+   *
+   * This signal is emitted when a plugin has detected a diagnostic while
+   * building the pipeline.
+   */
+  signals [DIAGNOSTIC] =
+    g_signal_new_class_handler ("diagnostic",
+                                G_TYPE_FROM_CLASS (klass),
+                                G_SIGNAL_RUN_LAST,
+                                NULL, NULL, NULL, NULL,
+                                G_TYPE_NONE, 1, IDE_TYPE_DIAGNOSTIC);
+
+  /**
+   * IdeBuildPipeline::started:
+   * @self: An #IdeBuildPipeline
+   *
+   * This signal is emitted when the pipeline has started executing in
+   * response to ide_build_pipeline_execute_async() being called.
+   */
+  signals [STARTED] =
+    g_signal_new_class_handler ("started",
+                                G_TYPE_FROM_CLASS (klass),
+                                G_SIGNAL_RUN_LAST,
+                                G_CALLBACK (ide_build_pipeline_real_started),
+                                NULL, NULL, NULL, G_TYPE_NONE, 0);
+
+  /**
+   * IdeBuildPipeline::finished:
+   * @self: An #IdeBuildPipeline
+   * @failed: If the build was a failure
+   *
+   * This signal is emitted when the build process has finished executing.
+   * If the build failed to complete all requested stages, then @failed will
+   * be set to %TRUE, otherwise %FALSE.
+   */
+  signals [FINISHED] =
+    g_signal_new_class_handler ("finished",
+                                G_TYPE_FROM_CLASS (klass),
+                                G_SIGNAL_RUN_LAST,
+                                G_CALLBACK (ide_build_pipeline_real_finished),
+                                NULL, NULL, NULL,
+                                G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
+}
+
+static void
+ide_build_pipeline_init (IdeBuildPipeline *self)
+{
+  EGG_COUNTER_INC (Instances);
+
+  self->position = -1;
+
+  self->pipeline = g_array_new (FALSE, FALSE, sizeof (PipelineEntry));
+  g_array_set_clear_func (self->pipeline, clear_pipeline_entry);
+
+  self->errfmts = g_array_new (FALSE, FALSE, sizeof (ErrorFormat));
+  g_array_set_clear_func (self->errfmts, clear_error_format);
+
+  self->log = ide_build_log_new ();
+}
+
+static void
+ide_build_pipeline_stage_execute_cb (GObject      *object,
+                                     GAsyncResult *result,
+                                     gpointer      user_data)
+{
+  IdeBuildStage *stage = (IdeBuildStage *)object;
+  IdeBuildPipeline *self;
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(GError) error = NULL;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_BUILD_STAGE (stage));
+  g_assert (G_IS_ASYNC_RESULT (result));
+  g_assert (G_IS_TASK (task));
+
+  self = g_task_get_source_object (task);
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+
+  if (!_ide_build_stage_execute_with_query_finish (stage, result, &error))
+    {
+      self->failed = TRUE;
+      g_task_return_error (task, g_steal_pointer (&error));
+      ide_build_pipeline_release_transients (self);
+      IDE_GOTO (failure);
+    }
+
+  ide_build_stage_set_completed (stage, TRUE);
+
+  ide_build_pipeline_tick (self, task);
+
+failure:
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_tick (IdeBuildPipeline *self,
+                         GTask            *task)
+{
+  GCancellable *cancellable;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+  g_assert (G_IS_TASK (task));
+
+  self->current_stage = NULL;
+
+  cancellable = g_task_get_cancellable (task);
+
+  for (self->position++; self->position < self->pipeline->len; self->position++)
+    {
+      const PipelineEntry *entry = &g_array_index (self->pipeline, PipelineEntry, self->position);
+
+      g_assert (entry->stage != NULL);
+      g_assert (IDE_IS_BUILD_STAGE (entry->stage));
+
+      if ((entry->phase & IDE_BUILD_PHASE_MASK) & self->requested_mask)
+        {
+          self->current_stage = entry->stage;
+
+          _ide_build_stage_execute_with_query_async (entry->stage,
+                                                     self,
+                                                     cancellable,
+                                                     ide_build_pipeline_stage_execute_cb,
+                                                     g_object_ref (task));
+
+          g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_PHASE]);
+
+          IDE_EXIT;
+        }
+    }
+
+  ide_build_pipeline_release_transients (self);
+
+  g_task_return_boolean (task, TRUE);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_pipeline_notify_completed (IdeBuildPipeline *self,
+                                     GParamSpec       *pspec,
+                                     GTask            *task)
+{
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_BUILD_PIPELINE (self));
+  g_assert (G_IS_TASK (task));
+
+  self->current_stage = NULL;
+  self->busy = FALSE;
+
+  g_signal_emit (self, signals [FINISHED], 0, self->failed);
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_BUSY]);
+
+  IDE_EXIT;
+}
+
+/**
+ * ide_build_pipeline_execute_async:
+ * @self: A @IdeBuildPipeline
+ * @cancellable: (nullable): A #GCancellable or %NULL
+ * @callback: a callback to execute upon completion
+ * @user_data: data for @callback
+ *
+ * Asynchronously starts the build pipeline.
+ *
+ * Any phase that has been invalidated up to the requested phase
+ * will be executed until a stage has failed.
+ *
+ * Upon completion, @callback will be executed and should call
+ * ide_build_pipeline_execute_finish() to get the status of the
+ * operation.
+ */
+void
+ide_build_pipeline_execute_async (IdeBuildPipeline    *self,
+                                  GCancellable        *cancellable,
+                                  GAsyncReadyCallback  callback,
+                                  gpointer             user_data)
+{
+  g_autoptr(GTask) task = NULL;
+  g_autoptr(GFile) builddir = NULL;
+  g_autoptr(GError) error = NULL;
+
+  IDE_ENTRY;
+
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self));
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_build_pipeline_execute_async);
+
+  if (self->busy)
+    {
+      g_task_return_new_error (task,
+                               G_IO_ERROR,
+                               G_IO_ERROR_PENDING,
+                               "The pipeline is already executing");
+      IDE_EXIT;
+    }
+
+  self->busy = TRUE;
+  self->failed = FALSE;
+  self->position = -1;
+
+  g_signal_emit (self, signals [STARTED], 0);
+
+  g_signal_connect_object (task,
+                           "notify::completed",
+                           G_CALLBACK (ide_build_pipeline_notify_completed),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  /*
+   * Before we make any progoress, ensure the build directory is created
+   * so that pipeline stages need not worry about it. We'll just do this
+   * synchronously because if we can't do directory creation fast, well
+   * then we are pretty much screwed anyway.
+   */
+
+  builddir = g_file_new_for_path (self->builddir);
+
+  if (!g_file_make_directory_with_parents (builddir, cancellable, &error) &&
+      !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
+    {
+      g_task_return_error (task, g_steal_pointer (&error));
+      IDE_EXIT;
+    }
+
+  IDE_TRACE_MSG ("Beginning pipeline execution with %u pipeline entries",
+                 self->pipeline->len);
+
+  ide_build_pipeline_tick (self, task);
+
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_BUSY]);
+
+  IDE_EXIT;
+}
+
+/**
+ * ide_build_pipeline_execute_finish:
+ *
+ * Returns: %TRUE if successful; otherwise %FALSE and @error is set.
+ */
+gboolean
+ide_build_pipeline_execute_finish (IdeBuildPipeline  *self,
+                                   GAsyncResult      *result,
+                                   GError           **error)
+{
+  gboolean ret;
+
+  IDE_ENTRY;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (result), FALSE);
+
+  ret = g_task_propagate_boolean (G_TASK (result), error);
+
+  IDE_RETURN (ret);
+}
+
+/**
+ * ide_build_pipeline_connect:
+ * @self: A #IdeBuildPipeline
+ * @phase: An #IdeBuildPhase
+ * @priority: an optional priority for sorting within the phase
+ * @stage: An #IdeBuildStage
+ *
+ * Insert @stage into the pipeline as part of the phase denoted by @phase.
+ *
+ * If priority is non-zero, it will be used to sort the stage among other
+ * stages that are part of the same phase.
+ *
+ * Returns: A stage_id that may be passed to ide_build_pipeline_disconnect().
+ */
+guint
+ide_build_pipeline_connect (IdeBuildPipeline *self,
+                            IdeBuildPhase     phase,
+                            gint              priority,
+                            IdeBuildStage    *stage)
+{
+  GFlagsClass *klass;
+  guint ret = 0;
+
+  IDE_ENTRY;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), 0);
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (stage), 0);
+  g_return_val_if_fail ((phase & IDE_BUILD_PHASE_MASK) != IDE_BUILD_PHASE_NONE, 0);
+  g_return_val_if_fail ((phase & IDE_BUILD_PHASE_WHENCE_MASK) == 0 ||
+                        (phase & IDE_BUILD_PHASE_WHENCE_MASK) == IDE_BUILD_PHASE_BEFORE ||
+                        (phase & IDE_BUILD_PHASE_WHENCE_MASK) == IDE_BUILD_PHASE_AFTER, 0);
+
+  if G_UNLIKELY (self->position != -1)
+    {
+      g_warning ("Cannot insert stage into pipeline after execution, ignoring");
+      IDE_RETURN (0);
+    }
+
+  klass = g_type_class_ref (IDE_TYPE_BUILD_PHASE);
+
+  for (guint i = 0; i < klass->n_values; i++)
+    {
+      const GFlagsValue *value = &klass->values[i];
+
+      if ((phase & IDE_BUILD_PHASE_MASK) == value->value)
+        {
+          PipelineEntry entry = { 0 };
+
+          IDE_TRACE_MSG ("Adding stage to pipeline with phase %s and priority %d",
+                         value->value_nick, priority);
+
+          entry.id = ++self->seqnum;
+          entry.phase = phase;
+          entry.priority = priority;
+          entry.stage = g_object_ref (stage);
+
+          g_array_append_val (self->pipeline, entry);
+          g_array_sort (self->pipeline, pipeline_entry_compare);
+
+          ret = entry.id;
+
+          ide_build_stage_set_log_observer (stage,
+                                            ide_build_pipeline_log_observer,
+                                            self,
+                                            NULL);
+
+          IDE_GOTO (cleanup);
+        }
+    }
+
+  g_warning ("No such pipeline phase %02x", phase);
+
+cleanup:
+  g_type_class_unref (klass);
+
+  IDE_RETURN (ret);
+}
+
+/**
+ * ide_build_pipeline_connect_launcher:
+ * @self: A #IdeBuildPipeline
+ * @phase: An #IdeBuildPhase
+ * @priority: an optional priority for sorting within the phase
+ * @launcher: An #IdeSubprocessLauncher
+ *
+ * This creates a new stage that will spawn a process using @launcher and log
+ * the output of stdin/stdout.
+ *
+ * It is a programmer error to modify @launcher after passing it to this
+ * function.
+ *
+ * Returns: A stage_id that may be passed to ide_build_pipeline_remove().
+ */
+guint
+ide_build_pipeline_connect_launcher (IdeBuildPipeline      *self,
+                                     IdeBuildPhase          phase,
+                                     gint                   priority,
+                                     IdeSubprocessLauncher *launcher)
+{
+  g_autoptr(IdeBuildStage) stage = NULL;
+  IdeContext *context;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), 0);
+  g_return_val_if_fail ((phase & IDE_BUILD_PHASE_MASK) != IDE_BUILD_PHASE_NONE, 0);
+  g_return_val_if_fail ((phase & IDE_BUILD_PHASE_WHENCE_MASK) == 0 ||
+                        (phase & IDE_BUILD_PHASE_WHENCE_MASK) == IDE_BUILD_PHASE_BEFORE ||
+                        (phase & IDE_BUILD_PHASE_WHENCE_MASK) == IDE_BUILD_PHASE_AFTER, 0);
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+  stage = ide_build_stage_launcher_new (context, launcher);
+
+  return ide_build_pipeline_connect (self, phase, priority, stage);
+}
+
+/**
+ * ide_build_pipeline_request_phase:
+ * @self: An #IdeBuildPipeline
+ * @phase: An #IdeBuildPhase
+ *
+ * Requests that the next execution of the pipeline will build up to @phase
+ * including all stages that were previously invalidated.
+ */
+void
+ide_build_pipeline_request_phase (IdeBuildPipeline *self,
+                                  IdeBuildPhase     phase)
+{
+  GFlagsClass *klass;
+
+  IDE_ENTRY;
+
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self));
+  g_return_if_fail ((phase & IDE_BUILD_PHASE_MASK) != IDE_BUILD_PHASE_NONE);
+
+  /*
+   * You can only request basic phases. That does not include modifiers
+   * like BEFORE, AFTER, FAILED, FINISHED.
+   */
+  phase &= IDE_BUILD_PHASE_MASK;
+
+  if (self->position != -1)
+    {
+      g_warning ("Cannot request phase after execution has started");
+      IDE_EXIT;
+    }
+
+  klass = g_type_class_ref (IDE_TYPE_BUILD_PHASE);
+
+  for (guint i = 0; i < klass->n_values; i++)
+    {
+      const GFlagsValue *value = &klass->values[i];
+
+      if (phase == value->value)
+        {
+          IDE_TRACE_MSG ("requesting pipeline phase %s", value->value_nick);
+          /*
+           * Each flag is a power of two, so we can simply subtract one
+           * to get a mask of all the previous phases.
+           */
+          self->requested_mask |= phase | (phase - 1);
+          IDE_GOTO (cleanup);
+        }
+    }
+
+  g_warning ("No such phase %02x", (guint)phase);
+
+cleanup:
+  g_type_class_unref (klass);
+
+  IDE_EXIT;
+}
+
+/**
+ * ide_build_pipeline_get_builddir:
+ * @self: An #IdeBuildPipeline
+ *
+ * Gets the "builddir" to be used for the build process. This is generally
+ * the location that build systems will use for out-of-tree builds.
+ *
+ * Returns: the path of the build directory
+ */
+const gchar *
+ide_build_pipeline_get_builddir (IdeBuildPipeline *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+
+  return self->builddir;
+}
+
+/**
+ * ide_build_pipeline_get_srcdir:
+ * @self: An #IdeBuildPipeline
+ *
+ * Gets the "srcdir" of the project. This is equivalent to the
+ * IdeVcs:working-directory property as a string.
+ *
+ * Returns: the path of the source directory
+ */
+const gchar *
+ide_build_pipeline_get_srcdir (IdeBuildPipeline *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+
+  return self->srcdir;
+}
+
+static gchar *
+ide_build_pipeline_build_path_va_list (const gchar *prefix,
+                                       const gchar *first_part,
+                                       va_list      args)
+{
+  g_autoptr(GPtrArray) ar = NULL;
+
+  g_assert (prefix != NULL);
+  g_assert (first_part != NULL);
+
+  ar = g_ptr_array_new ();
+  g_ptr_array_add (ar, (gchar *)prefix);
+  do
+    g_ptr_array_add (ar, (gchar *)first_part);
+  while (NULL != (first_part = va_arg (args, const gchar *)));
+  g_ptr_array_add (ar, NULL);
+
+  return g_build_filenamev ((gchar **)ar->pdata);
+}
+
+/**
+ * ide_build_pipeline_build_srcdir_path:
+ *
+ * This is a convenience function to create a new path that starts with
+ * the source directory of the project.
+ *
+ * This is functionally equivalent to calling g_build_filename() with the
+ * working directory of the source tree.
+ *
+ * Returns: (transfer full): A newly allocated string.
+ */
+gchar *
+ide_build_pipeline_build_srcdir_path (IdeBuildPipeline *self,
+                                      const gchar      *first_part,
+                                      ...)
+{
+  gchar *ret;
+  va_list args;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+  g_return_val_if_fail (first_part != NULL, NULL);
+
+  va_start (args, first_part);
+  ret = ide_build_pipeline_build_path_va_list (self->srcdir, first_part, args);
+  va_end (args);
+
+  return ret;
+}
+
+/**
+ * ide_build_pipeline_build_builddir_path:
+ *
+ * This is a convenience function to create a new path that starts with
+ * the build directory for this build configuration.
+ *
+ * This is functionally equivalent to calling g_build_filename() with the
+ * result of ide_build_pipeline_get_builddir() as the first parameter.
+ *
+ * Returns: (transfer full): A newly allocated string.
+ */
+gchar *
+ide_build_pipeline_build_builddir_path (IdeBuildPipeline *self,
+                                        const gchar      *first_part,
+                                        ...)
+{
+  gchar *ret;
+  va_list args;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+  g_return_val_if_fail (first_part != NULL, NULL);
+
+  va_start (args, first_part);
+  ret = ide_build_pipeline_build_path_va_list (self->builddir, first_part, args);
+  va_end (args);
+
+  return ret;
+}
+
+/**
+ * ide_build_pipeline_disconnect:
+ * @self: An #IdeBuildPipeline
+ * @stage_id: An identifier returned from adding a stage
+ *
+ * This removes the stage matching @stage_id. You are returned a @stage_id when
+ * inserting a stage with functions such as ide_build_pipeline_connect()
+ * or ide_build_pipeline_connect_launcher().
+ *
+ * Plugins should use this function to remove their stages when the plugin
+ * is unloading.
+ */
+void
+ide_build_pipeline_disconnect (IdeBuildPipeline *self,
+                               guint             stage_id)
+{
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self));
+  g_return_if_fail (self->pipeline != NULL);
+  g_return_if_fail (stage_id != 0);
+
+  for (guint i = 0; i < self->pipeline->len; i++)
+    {
+      const PipelineEntry *entry = &g_array_index (self->pipeline, PipelineEntry, i);
+
+      if (entry->id == stage_id)
+        {
+          g_array_remove_index (self->pipeline, i);
+          break;
+        }
+    }
+}
+
+/**
+ * ide_build_pipeline_invalidate_phase:
+ * @self: An #IdeBuildPipeline
+ * @phases: The phases to invalidate
+ *
+ * Invalidates the phases matching @phases flags.
+ *
+ * If the requested phases include the phases invalidated here, the next
+ * execution of the pipeline will execute thse phases.
+ *
+ * This should be used by plugins to ensure a particular phase is re-executed
+ * upon discovering its state is no longer valid. Such an example might be
+ * invalidating the %IDE_BUILD_PHASE_AUTOGEN phase when the an autotools
+ * projects autogen.sh file has been changed.
+ */
+void
+ide_build_pipeline_invalidate_phase (IdeBuildPipeline *self,
+                                     IdeBuildPhase     phases)
+{
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self));
+
+  for (guint i = 0; i < self->pipeline->len; i++)
+    {
+      const PipelineEntry *entry = &g_array_index (self->pipeline, PipelineEntry, i);
+
+      if ((entry->phase & IDE_BUILD_PHASE_MASK) & phases)
+        ide_build_stage_set_completed (entry->stage, FALSE);
+    }
+}
+
+/**
+ * ide_build_pipeline_get_stage_by_id:
+ * @self: An #IdeBuildPipeline
+ * @stage_id: the identfier of the stage
+ *
+ * Gets the stage matching the identifier @stage_id as returned from
+ * ide_build_pipeline_connect().
+ *
+ * Returns: (transfer none) (nullable): An #IdeBuildStage or %NULL if the
+ *   stage could not be found.
+ */
+IdeBuildStage *
+ide_build_pipeline_get_stage_by_id (IdeBuildPipeline *self,
+                                    guint             stage_id)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+
+  for (guint i = 0; i < self->pipeline->len; i++)
+    {
+      const PipelineEntry *entry = &g_array_index (self->pipeline, PipelineEntry, i);
+
+      if (entry->id == stage_id)
+        return entry->stage;
+    }
+
+  return NULL;
+}
+
+/**
+ * ide_build_pipeline_create_launcher:
+ * @self: An #IdeBuildPipeline
+ *
+ * This is a convenience function to create a new #IdeSubprocessLauncher
+ * using the configuration and runtime associated with the pipeline.
+ *
+ * Returns: (transfer full): An #IdeSubprocessLauncher.
+ */
+IdeSubprocessLauncher *
+ide_build_pipeline_create_launcher (IdeBuildPipeline  *self,
+                                    GError           **error)
+{
+  IdeRuntime *runtime;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+
+  runtime = ide_configuration_get_runtime (self->configuration);
+
+  if (runtime == NULL)
+    {
+      g_set_error (error,
+                   G_IO_ERROR,
+                   G_IO_ERROR_FAILED,
+                   "The runtime %s is missing",
+                   ide_configuration_get_runtime_id (self->configuration));
+      return NULL;
+    }
+
+  return ide_runtime_create_launcher (runtime, error);
+}
+
+guint
+ide_build_pipeline_add_log_observer (IdeBuildPipeline    *self,
+                                     IdeBuildLogObserver  observer,
+                                     gpointer             observer_data,
+                                     GDestroyNotify       observer_data_destroy)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), 0);
+  g_return_val_if_fail (observer != NULL, 0);
+
+  return ide_build_log_add_observer (self->log, observer, observer_data, observer_data_destroy);
+
+}
+
+gboolean
+ide_build_pipeline_remove_log_observer (IdeBuildPipeline *self,
+                                        guint             observer_id)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), FALSE);
+  g_return_val_if_fail (observer_id > 0, FALSE);
+
+  return ide_build_log_remove_observer (self->log, observer_id);
+}
+
+void
+ide_build_pipeline_emit_diagnostic (IdeBuildPipeline *self,
+                                    IdeDiagnostic    *diagnostic)
+{
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self));
+  g_return_if_fail (diagnostic != NULL);
+  g_return_if_fail (IDE_IS_MAIN_THREAD ());
+
+  g_signal_emit (self, signals[DIAGNOSTIC], 0, diagnostic);
+}
+
+/**
+ * ide_build_pipeline_add_error_format:
+ * @self: A #IdeBuildPipeline
+ * @regex: A regex to be compiled
+ *
+ * This can be used to add a regex that will extract errors from
+ * standard output. This is similar to the "errorformat" feature
+ * of vim to extract warnings from standard output.
+ *
+ * The regex should used named capture groups to pass information
+ * to the extraction process.
+ *
+ * Supported group names are:
+ *
+ *  • filename (a string path)
+ *  • line (an integer)
+ *  • column (an integer)
+ *  • level (a string)
+ *  • message (a string)
+ *
+ * For example, to extract warnings from GCC you might do something
+ * like the following:
+ *
+ *   "(?<filename>[a-zA-Z0-9\\-\\.\\/]+):"
+ *   "(?<line>\\d+):"
+ *   "(?<column>\\d+): "
+ *   "(?<level>[\\w\\s]+): "
+ *   "(?<message>.*)"
+ *
+ * To remove the regex, use the ide_build_pipeline_remove_error_format()
+ * function with the resulting format id returned from this function.
+ *
+ * The resulting format id will be > 0 if successful.
+ *
+ * Returns: an error format id that may be passed to
+ *   ide_build_pipeline_remove_error_format().
+ */
+guint
+ide_build_pipeline_add_error_format (IdeBuildPipeline   *self,
+                                     const gchar        *regex,
+                                     GRegexCompileFlags  flags)
+{
+  ErrorFormat errfmt = { 0 };
+  g_autoptr(GError) error = NULL;
+
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), 0);
+
+  errfmt.regex = g_regex_new (regex, G_REGEX_OPTIMIZE | flags, 0, &error);
+
+  if (errfmt.regex == NULL)
+    {
+      g_warning ("%s", error->message);
+      return 0;
+    }
+
+  errfmt.id = ++self->errfmt_seqnum;
+
+  g_array_append_val (self->errfmts, errfmt);
+
+  return errfmt.id;
+}
+
+/**
+ * ide_build_pipeline_remove_error_format:
+ * @self: An #IdeBuildPipeline
+ * @error_format_id: an identifier for the error format.
+ *
+ * Removes an error format that was registered with
+ * ide_build_pipeline_add_error_format().
+ *
+ * Returns: %TRUE if the error format was removed.
+ */
+gboolean
+ide_build_pipeline_remove_error_format (IdeBuildPipeline *self,
+                                        guint             error_format_id)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), FALSE);
+  g_return_val_if_fail (error_format_id > 0, FALSE);
+
+  for (guint i = 0; i < self->errfmts->len; i++)
+    {
+      const ErrorFormat *errfmt = &g_array_index (self->errfmts, ErrorFormat, i);
+
+      if (errfmt->id == error_format_id)
+        {
+          g_array_remove_index (self->errfmts, i);
+          return TRUE;
+        }
+    }
+
+  return FALSE;
+}
+
+gboolean
+ide_build_pipeline_get_busy (IdeBuildPipeline *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), FALSE);
+
+  return self->busy;
+}
+
+/**
+ * ide_build_pipeline_get_message:
+ * @self: An #IdeBuildPipeline
+ *
+ * Gets the current message for the build pipeline. This can be
+ * shown to users in UI elements to signify progress in the
+ * build.
+ *
+ * Returns: (nullable) (transfer full): A string representing the
+ *   current stage of the build, or %NULL.
+ */
+gchar *
+ide_build_pipeline_get_message (IdeBuildPipeline *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_PIPELINE (self), NULL);
+
+  if (self->current_stage != NULL)
+    return g_strdup (ide_build_stage_get_name (self->current_stage));
+
+  return NULL;
+}
+
+/**
+ * ide_build_pipeline_foreach_stage:
+ * @self: An #IdeBuildPipeline
+ * @stage_callback: (scope call): A callback for each #IdePipelineStage
+ * @user_data: user data for @stage_callback
+ *
+ * This function will call @stage_callback for every #IdeBuildStage registered
+ * in the pipeline.
+ */
+void
+ide_build_pipeline_foreach_stage (IdeBuildPipeline *self,
+                                  GFunc             stage_callback,
+                                  gpointer          user_data)
+{
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self));
+  g_return_if_fail (stage_callback != NULL);
+
+  for (guint i = 0; i < self->pipeline->len; i++)
+    {
+      const PipelineEntry *entry = &g_array_index (self->pipeline, PipelineEntry, i);
+
+      stage_callback (entry->stage, user_data);
+    }
+}
diff --git a/libide/buildsystem/ide-build-pipeline.h b/libide/buildsystem/ide-build-pipeline.h
new file mode 100644
index 0000000..5004446
--- /dev/null
+++ b/libide/buildsystem/ide-build-pipeline.h
@@ -0,0 +1,112 @@
+/* ide-build-pipeline.h
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_BUILD_PIPELINE_H
+#define IDE_BUILD_PIPELINE_H
+
+#include <gio/gio.h>
+
+#include "ide-types.h"
+
+#include "buildsystem/ide-build-log.h"
+#include "buildsystem/ide-build-stage.h"
+#include "buildsystem/ide-configuration.h"
+#include "subprocess/ide-subprocess-launcher.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_BUILD_PIPELINE     (ide_build_pipeline_get_type())
+#define IDE_BUILD_PHASE_MASK        (0xFFFFFF)
+#define IDE_BUILD_PHASE_WHENCE_MASK (IDE_BUILD_PHASE_BEFORE | IDE_BUILD_PHASE_AFTER)
+
+typedef enum
+{
+  IDE_BUILD_PHASE_NONE         = 0,
+  IDE_BUILD_PHASE_PREPARE      = 1 << 0,
+  IDE_BUILD_PHASE_DOWNLOADS    = 1 << 1,
+  IDE_BUILD_PHASE_DEPENDENCIES = 1 << 2,
+  IDE_BUILD_PHASE_AUTOGEN      = 1 << 3,
+  IDE_BUILD_PHASE_CONFIGURE    = 1 << 4,
+  IDE_BUILD_PHASE_BUILD        = 1 << 6,
+  IDE_BUILD_PHASE_INSTALL      = 1 << 7,
+  IDE_BUILD_PHASE_EXPORT       = 1 << 8,
+  IDE_BUILD_PHASE_FINAL        = 1 << 9,
+  IDE_BUILD_PHASE_BEFORE       = 1 << 28,
+  IDE_BUILD_PHASE_AFTER        = 1 << 29,
+  IDE_BUILD_PHASE_FINISHED     = 1 << 30,
+  IDE_BUILD_PHASE_FAILED       = 1 << 31,
+} IdeBuildPhase;
+
+G_DECLARE_FINAL_TYPE (IdeBuildPipeline, ide_build_pipeline, IDE, BUILD_PIPELINE, IdeObject)
+
+gboolean               ide_build_pipeline_get_busy            (IdeBuildPipeline       *self);
+IdeConfiguration      *ide_build_pipeline_get_configuration   (IdeBuildPipeline       *self);
+const gchar           *ide_build_pipeline_get_builddir        (IdeBuildPipeline       *self);
+const gchar           *ide_build_pipeline_get_srcdir          (IdeBuildPipeline       *self);
+gchar                 *ide_build_pipeline_get_message         (IdeBuildPipeline       *self);
+IdeSubprocessLauncher *ide_build_pipeline_create_launcher     (IdeBuildPipeline       *self,
+                                                               GError                **error);
+gchar                 *ide_build_pipeline_build_srcdir_path   (IdeBuildPipeline       *self,
+                                                               const gchar            *first_part,
+                                                               ...) G_GNUC_NULL_TERMINATED;
+gchar                 *ide_build_pipeline_build_builddir_path (IdeBuildPipeline       *self,
+                                                               const gchar            *first_part,
+                                                               ...) G_GNUC_NULL_TERMINATED;
+void                   ide_build_pipeline_invalidate_phase    (IdeBuildPipeline       *self,
+                                                               IdeBuildPhase           phases);
+void                   ide_build_pipeline_request_phase       (IdeBuildPipeline       *self,
+                                                               IdeBuildPhase           phase);
+guint                  ide_build_pipeline_connect             (IdeBuildPipeline       *self,
+                                                               IdeBuildPhase           phase,
+                                                               gint                    priority,
+                                                               IdeBuildStage          *stage);
+guint                  ide_build_pipeline_connect_launcher    (IdeBuildPipeline       *self,
+                                                               IdeBuildPhase           phase,
+                                                               gint                    priority,
+                                                               IdeSubprocessLauncher  *launcher);
+void                   ide_build_pipeline_disconnect          (IdeBuildPipeline       *self,
+                                                               guint                   stage_id);
+IdeBuildStage         *ide_build_pipeline_get_stage_by_id     (IdeBuildPipeline       *self,
+                                                               guint                   stage_id);
+guint                  ide_build_pipeline_add_log_observer    (IdeBuildPipeline       *self,
+                                                               IdeBuildLogObserver     observer,
+                                                               gpointer                observer_data,
+                                                               GDestroyNotify          
observer_data_destroy);
+gboolean               ide_build_pipeline_remove_log_observer (IdeBuildPipeline       *self,
+                                                               guint                   observer_id);
+void                   ide_build_pipeline_emit_diagnostic     (IdeBuildPipeline       *self,
+                                                               IdeDiagnostic          *diagnostic);
+guint                  ide_build_pipeline_add_error_format    (IdeBuildPipeline       *self,
+                                                               const gchar            *regex,
+                                                               GRegexCompileFlags      flags);
+gboolean               ide_build_pipeline_remove_error_format (IdeBuildPipeline       *self,
+                                                               guint                   error_format_id);
+void                   ide_build_pipeline_execute_async       (IdeBuildPipeline       *self,
+                                                               GCancellable           *cancellable,
+                                                               GAsyncReadyCallback     callback,
+                                                               gpointer                user_data);
+gboolean               ide_build_pipeline_execute_finish      (IdeBuildPipeline       *self,
+                                                               GAsyncResult           *result,
+                                                               GError                **error);
+void                   ide_build_pipeline_foreach_stage       (IdeBuildPipeline       *self,
+                                                               GFunc                   stage_callback,
+                                                               gpointer                user_data);
+
+G_END_DECLS
+
+#endif /* IDE_BUILD_PIPELINE_H */
diff --git a/libide/buildsystem/ide-build-stage-launcher.c b/libide/buildsystem/ide-build-stage-launcher.c
new file mode 100644
index 0000000..3f881ab
--- /dev/null
+++ b/libide/buildsystem/ide-build-stage-launcher.c
@@ -0,0 +1,277 @@
+/* ide-build-stage-launcher.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-stage-launcher"
+
+#include "ide-debug.h"
+
+#include "buildsystem/ide-build-log.h"
+#include "buildsystem/ide-build-pipeline.h"
+#include "buildsystem/ide-build-stage-launcher.h"
+#include "subprocess/ide-subprocess.h"
+
+struct _IdeBuildStageLauncher
+{
+  IdeBuildStage          parent_instance;
+  IdeSubprocessLauncher *launcher;
+};
+
+enum {
+  PROP_0,
+  PROP_LAUNCHER,
+  N_PROPS
+};
+
+G_DEFINE_TYPE (IdeBuildStageLauncher, ide_build_stage_launcher, IDE_TYPE_BUILD_STAGE)
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+ide_build_stage_launcher_wait_check_cb (GObject      *object,
+                                        GAsyncResult *result,
+                                        gpointer      user_data)
+{
+  IdeSubprocess *subprocess = (IdeSubprocess *)object;
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(GError) error = NULL;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_SUBPROCESS (subprocess));
+  g_assert (G_IS_ASYNC_RESULT (result));
+
+  if (!ide_subprocess_wait_check_finish (subprocess, result, &error))
+    g_task_return_error (task, g_steal_pointer (&error));
+  else
+    g_task_return_boolean (task, TRUE);
+
+  IDE_EXIT;
+}
+
+static void
+ide_build_stage_launcher_execute_async (IdeBuildStage       *stage,
+                                        IdeBuildPipeline    *pipeline,
+                                        GCancellable        *cancellable,
+                                        GAsyncReadyCallback  callback,
+                                        gpointer             user_data)
+{
+  IdeBuildStageLauncher *self = (IdeBuildStageLauncher *)stage;
+  g_autoptr(GTask) task = NULL;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(IdeSubprocess) subprocess = NULL;
+  const gchar * const *argv;
+  GSubprocessFlags flags;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_BUILD_STAGE_LAUNCHER (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_build_stage_launcher_execute_async);
+
+  if (self->launcher == NULL)
+    {
+      g_task_return_new_error (task,
+                               G_IO_ERROR,
+                               G_IO_ERROR_INVAL,
+                               "Improperly configured %s",
+                               G_OBJECT_TYPE_NAME (self));
+      IDE_EXIT;
+    }
+
+  flags = ide_subprocess_launcher_get_flags (self->launcher);
+
+  /* Disable flags we do not want set for build pipeline stuff */
+
+  if (flags & G_SUBPROCESS_FLAGS_STDERR_SILENCE)
+    flags &= ~G_SUBPROCESS_FLAGS_STDERR_SILENCE;
+
+  if (flags & G_SUBPROCESS_FLAGS_STDERR_MERGE)
+    flags &= ~G_SUBPROCESS_FLAGS_STDERR_MERGE;
+
+  if (flags & G_SUBPROCESS_FLAGS_STDIN_INHERIT)
+    flags &= ~G_SUBPROCESS_FLAGS_STDIN_INHERIT;
+
+  /* Ensure we have access to stdin/stdout streams */
+
+  flags |= G_SUBPROCESS_FLAGS_STDOUT_PIPE;
+  flags |= G_SUBPROCESS_FLAGS_STDERR_PIPE;
+
+  ide_subprocess_launcher_set_flags (self->launcher, flags);
+
+  /* Log the command line to build log */
+
+  argv = ide_subprocess_launcher_get_argv (self->launcher);
+
+  if (argv != NULL && argv[0] != NULL)
+    {
+      g_autoptr(GString) argv_str = g_string_new ("Executing ");
+
+      g_string_append (argv_str, argv[0]);
+
+      for (guint i = 1; argv[i] != NULL; i++)
+        {
+          g_autofree gchar *quoted = g_shell_quote (argv[i]);
+
+          g_string_append_printf (argv_str, " '%s'", quoted);
+        }
+
+      g_string_append (argv_str, " from directory '");
+      g_string_append (argv_str, ide_subprocess_launcher_get_cwd (self->launcher));
+      g_string_append (argv_str, "'");
+
+      ide_build_stage_log (stage, IDE_BUILD_LOG_STDOUT, argv_str->str, argv_str->len);
+    }
+
+  /* Now launch the process */
+
+  subprocess = ide_subprocess_launcher_spawn (self->launcher, cancellable, &error);
+
+  if (subprocess == NULL)
+    {
+      g_task_return_error (task, g_steal_pointer (&error));
+      IDE_EXIT;
+    }
+
+  ide_build_stage_log_subprocess (IDE_BUILD_STAGE (self), subprocess);
+
+  ide_subprocess_wait_check_async (subprocess,
+                                   cancellable,
+                                   ide_build_stage_launcher_wait_check_cb,
+                                   g_steal_pointer (&task));
+
+  IDE_EXIT;
+}
+
+static gboolean
+ide_build_stage_launcher_execute_finish (IdeBuildStage  *stage,
+                                         GAsyncResult   *result,
+                                         GError        **error)
+{
+  gboolean ret;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_BUILD_STAGE_LAUNCHER (stage));
+  g_assert (G_IS_TASK (result));
+
+  ret = g_task_propagate_boolean (G_TASK (result), error);
+
+  IDE_RETURN (ret);
+}
+
+static void
+ide_build_stage_launcher_finalize (GObject *object)
+{
+  IdeBuildStageLauncher *self = (IdeBuildStageLauncher *)object;
+
+  g_clear_object (&self->launcher);
+
+  G_OBJECT_CLASS (ide_build_stage_launcher_parent_class)->finalize (object);
+}
+
+static void
+ide_build_stage_launcher_get_property (GObject    *object,
+                                       guint       prop_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  IdeBuildStageLauncher *self = (IdeBuildStageLauncher *)object;
+
+  switch (prop_id)
+    {
+    case PROP_LAUNCHER:
+      g_value_set_object (value, ide_build_stage_launcher_get_launcher (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_stage_launcher_set_property (GObject      *object,
+                                       guint         prop_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  IdeBuildStageLauncher *self = (IdeBuildStageLauncher *)object;
+
+  switch (prop_id)
+    {
+    case PROP_LAUNCHER:
+      self->launcher = g_value_dup_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_stage_launcher_class_init (IdeBuildStageLauncherClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  IdeBuildStageClass *build_stage_class = IDE_BUILD_STAGE_CLASS (klass);
+
+  object_class->finalize = ide_build_stage_launcher_finalize;
+  object_class->get_property = ide_build_stage_launcher_get_property;
+  object_class->set_property = ide_build_stage_launcher_set_property;
+
+  build_stage_class->execute_async = ide_build_stage_launcher_execute_async;
+  build_stage_class->execute_finish = ide_build_stage_launcher_execute_finish;
+
+  properties [PROP_LAUNCHER] =
+    g_param_spec_object ("launcher",
+                         "Launcher",
+                         "The subprocess launcher to execute",
+                         IDE_TYPE_SUBPROCESS_LAUNCHER,
+                         (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
+  
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+ide_build_stage_launcher_init (IdeBuildStageLauncher *self)
+{
+}
+
+/**
+ * ide_build_stage_launcher_get_launcher:
+ *
+ * Returns: (transfer none): An #IdeSubprocessLauncher
+ */
+IdeSubprocessLauncher *
+ide_build_stage_launcher_get_launcher (IdeBuildStageLauncher *self)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE_LAUNCHER (self), NULL);
+
+  return self->launcher;
+}
+
+IdeBuildStage *
+ide_build_stage_launcher_new (IdeContext            *context,
+                              IdeSubprocessLauncher *launcher)
+{
+  return g_object_new (IDE_TYPE_BUILD_STAGE_LAUNCHER,
+                       "context", context,
+                       "launcher", launcher,
+                       NULL);
+}
diff --git a/libide/buildsystem/ide-simple-builder.h b/libide/buildsystem/ide-build-stage-launcher.h
similarity index 50%
copy from libide/buildsystem/ide-simple-builder.h
copy to libide/buildsystem/ide-build-stage-launcher.h
index 705ef74..e3eb2e8 100644
--- a/libide/buildsystem/ide-simple-builder.h
+++ b/libide/buildsystem/ide-build-stage-launcher.h
@@ -1,4 +1,4 @@
-/* ide-simple-builder.h
+/* ide-build-stage-launcher.h
  *
  * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
@@ -16,32 +16,26 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_SIMPLE_BUILDER_H
-#define IDE_SIMPLE_BUILDER_H
+#ifndef IDE_BUILD_STAGE_LAUNCHER_H
+#define IDE_BUILD_STAGE_LAUNCHER_H
 
-#include "buildsystem/ide-builder.h"
-#include "buildsystem/ide-configuration.h"
+#include <gio/gio.h>
 
-G_BEGIN_DECLS
+#include "ide-context.h"
+
+#include "buildsystem/ide-build-stage.h"
+#include "subprocess/ide-subprocess-launcher.h"
 
-#define IDE_TYPE_SIMPLE_BUILDER (ide_simple_builder_get_type())
+G_BEGIN_DECLS
 
-G_DECLARE_DERIVABLE_TYPE (IdeSimpleBuilder, ide_simple_builder, IDE, SIMPLE_BUILDER, IdeBuilder)
+#define IDE_TYPE_BUILD_STAGE_LAUNCHER (ide_build_stage_launcher_get_type())
 
-struct _IdeSimpleBuilderClass
-{
-  IdeBuilderClass parent_class;
+G_DECLARE_FINAL_TYPE (IdeBuildStageLauncher, ide_build_stage_launcher, IDE, BUILD_STAGE_LAUNCHER, 
IdeBuildStage)
 
-  gpointer _reserved1;
-  gpointer _reserved2;
-  gpointer _reserved3;
-  gpointer _reserved4;
-  gpointer _reserved5;
-  gpointer _reserved6;
-  gpointer _reserved7;
-  gpointer _reserved8;
-};
+IdeBuildStage         *ide_build_stage_launcher_new          (IdeContext            *context,
+                                                              IdeSubprocessLauncher *launcher);
+IdeSubprocessLauncher *ide_build_stage_launcher_get_launcher (IdeBuildStageLauncher *self);
 
 G_END_DECLS
 
-#endif /* IDE_SIMPLE_BUILDER_H */
+#endif /* IDE_BUILD_STAGE_LAUNCHER_H */
diff --git a/libide/buildsystem/ide-build-stage-mkdirs.c b/libide/buildsystem/ide-build-stage-mkdirs.c
new file mode 100644
index 0000000..c284fa7
--- /dev/null
+++ b/libide/buildsystem/ide-build-stage-mkdirs.c
@@ -0,0 +1,146 @@
+/* ide-build-stage-mkdirs.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-stage-mkdirs"
+
+#include <glib.h>
+#include <glib/gprintf.h>
+#include <glib/gstdio.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "ide-build-stage-mkdirs.h"
+
+typedef struct
+{
+  gchar    *path;
+  gboolean  with_parents;
+  gint      mode;
+} Path;
+
+typedef struct
+{
+  GArray *paths;
+} IdeBuildStageMkdirsPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (IdeBuildStageMkdirs, ide_build_stage_mkdirs, IDE_TYPE_BUILD_STAGE)
+
+static void
+clear_path (gpointer data)
+{
+  Path *p = data;
+
+  g_clear_pointer (&p->path, g_free);
+}
+
+static gboolean
+ide_build_stage_mkdirs_execute (IdeBuildStage     *stage,
+                                IdeBuildPipeline  *pipeline,
+                                GCancellable      *cancellable,
+                                GError           **error)
+{
+  IdeBuildStageMkdirs *self = (IdeBuildStageMkdirs *)stage;
+  IdeBuildStageMkdirsPrivate *priv = ide_build_stage_mkdirs_get_instance_private (self);
+
+  g_assert (IDE_IS_BUILD_STAGE_MKDIRS (self));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  for (guint i = 0; i < priv->paths->len; i++)
+    {
+      const Path *path = &g_array_index (priv->paths, Path, i);
+      gboolean r;
+
+      if (g_file_test (path->path, G_FILE_TEST_IS_DIR))
+        continue;
+
+      if (path->with_parents)
+        r = g_mkdir_with_parents (path->path, path->mode);
+      else
+        r = g_mkdir (path->path, path->mode);
+
+      if (r != 0)
+        {
+          g_set_error_literal (error,
+                               G_FILE_ERROR,
+                               g_file_error_from_errno (errno),
+                               g_strerror (errno));
+          return FALSE;
+        }
+    }
+
+  return TRUE;
+}
+
+static void
+ide_build_stage_mkdirs_finalize (GObject *object)
+{
+  IdeBuildStageMkdirs *self = (IdeBuildStageMkdirs *)object;
+  IdeBuildStageMkdirsPrivate *priv = ide_build_stage_mkdirs_get_instance_private (self);
+
+  g_clear_pointer (&priv->paths, g_array_unref);
+
+  G_OBJECT_CLASS (ide_build_stage_mkdirs_parent_class)->finalize (object);
+}
+
+static void
+ide_build_stage_mkdirs_class_init (IdeBuildStageMkdirsClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  IdeBuildStageClass *stage_class = IDE_BUILD_STAGE_CLASS (klass);
+
+  object_class->finalize = ide_build_stage_mkdirs_finalize;
+
+  stage_class->execute = ide_build_stage_mkdirs_execute;
+}
+
+static void
+ide_build_stage_mkdirs_init (IdeBuildStageMkdirs *self)
+{
+  IdeBuildStageMkdirsPrivate *priv = ide_build_stage_mkdirs_get_instance_private (self);
+
+  priv->paths = g_array_new (FALSE, FALSE, sizeof (Path));
+  g_array_set_clear_func (priv->paths, clear_path);
+}
+
+IdeBuildStage *
+ide_build_stage_mkdirs_new (IdeContext *context)
+{
+  return g_object_new (IDE_TYPE_BUILD_STAGE_MKDIRS,
+                       "context", context,
+                       NULL);
+}
+
+void
+ide_build_stage_mkdirs_add_path (IdeBuildStageMkdirs *self,
+                                 const gchar         *path,
+                                 gboolean             with_parents,
+                                 gint                 mode)
+{
+  IdeBuildStageMkdirsPrivate *priv = ide_build_stage_mkdirs_get_instance_private (self);
+  Path ele = { 0 };
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE_MKDIRS (self));
+  g_return_if_fail (path != NULL);
+
+  ele.path = g_strdup (path);
+  ele.with_parents = with_parents;
+  ele.mode = mode;
+
+  g_array_append_val (priv->paths, ele);
+}
diff --git a/libide/buildsystem/ide-simple-builder.h b/libide/buildsystem/ide-build-stage-mkdirs.h
similarity index 51%
copy from libide/buildsystem/ide-simple-builder.h
copy to libide/buildsystem/ide-build-stage-mkdirs.h
index 705ef74..3f25659 100644
--- a/libide/buildsystem/ide-simple-builder.h
+++ b/libide/buildsystem/ide-build-stage-mkdirs.h
@@ -1,4 +1,4 @@
-/* ide-simple-builder.h
+/* ide-build-stage-mkdirs.h
  *
  * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
@@ -16,32 +16,33 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_SIMPLE_BUILDER_H
-#define IDE_SIMPLE_BUILDER_H
+#ifndef IDE_BUILD_STAGE_MKDIRS_H
+#define IDE_BUILD_STAGE_MKDIRS_H
 
-#include "buildsystem/ide-builder.h"
-#include "buildsystem/ide-configuration.h"
+#include "ide-build-stage.h"
 
 G_BEGIN_DECLS
 
-#define IDE_TYPE_SIMPLE_BUILDER (ide_simple_builder_get_type())
+#define IDE_TYPE_BUILD_STAGE_MKDIRS (ide_build_stage_mkdirs_get_type())
 
-G_DECLARE_DERIVABLE_TYPE (IdeSimpleBuilder, ide_simple_builder, IDE, SIMPLE_BUILDER, IdeBuilder)
+G_DECLARE_DERIVABLE_TYPE (IdeBuildStageMkdirs, ide_build_stage_mkdirs, IDE, BUILD_STAGE_MKDIRS, 
IdeBuildStage)
 
-struct _IdeSimpleBuilderClass
+struct _IdeBuildStageMkdirsClass
 {
-  IdeBuilderClass parent_class;
+  IdeBuildStageClass parent_class;
 
   gpointer _reserved1;
   gpointer _reserved2;
   gpointer _reserved3;
   gpointer _reserved4;
-  gpointer _reserved5;
-  gpointer _reserved6;
-  gpointer _reserved7;
-  gpointer _reserved8;
 };
 
+IdeBuildStage *ide_build_stage_mkdirs_new      (IdeContext          *context);
+void           ide_build_stage_mkdirs_add_path (IdeBuildStageMkdirs *self,
+                                                const gchar         *path,
+                                                gboolean             with_parents,
+                                                gint                 mode);
+
 G_END_DECLS
 
-#endif /* IDE_SIMPLE_BUILDER_H */
+#endif /* IDE_BUILD_STAGE_MKDIRS_H */
diff --git a/libide/buildsystem/ide-build-stage-private.h b/libide/buildsystem/ide-build-stage-private.h
new file mode 100644
index 0000000..f84245d
--- /dev/null
+++ b/libide/buildsystem/ide-build-stage-private.h
@@ -0,0 +1,38 @@
+/* ide-build-stage-private.h
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_BUILD_STAGE_PRIVATE_H
+#define IDE_BUILD_STAGE_PRIVATE_H
+
+#include "ide-build-pipeline.h"
+#include "ide-build-stage.h"
+
+G_BEGIN_DECLS
+
+void     _ide_build_stage_execute_with_query_async  (IdeBuildStage        *self,
+                                                     IdeBuildPipeline     *pipeline,
+                                                     GCancellable         *cancellable,
+                                                     GAsyncReadyCallback   callback,
+                                                     gpointer              user_data);
+gboolean _ide_build_stage_execute_with_query_finish (IdeBuildStage        *self,
+                                                     GAsyncResult         *result,
+                                                     GError              **error);
+
+G_END_DECLS
+
+#endif /* IDE_BUILD_STAGE_PRIVATE_H */
diff --git a/libide/buildsystem/ide-build-stage-transfer.c b/libide/buildsystem/ide-build-stage-transfer.c
new file mode 100644
index 0000000..5edefe3
--- /dev/null
+++ b/libide/buildsystem/ide-build-stage-transfer.c
@@ -0,0 +1,183 @@
+/* ide-build-stage-transfer.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-stage-transfer"
+
+#include "ide-context.h"
+
+#include "buildsystem/ide-build-stage-transfer.h"
+#include "buildsystem/ide-build-pipeline.h"
+#include "transfers/ide-transfer-manager.h"
+#include "transfers/ide-transfer.h"
+
+struct _IdeBuildStageTransfer
+{
+  IdeBuildStage  parent_instnace;
+  IdeTransfer   *transfer;
+};
+
+enum {
+  PROP_0,
+  PROP_TRANSFER,
+  N_PROPS
+};
+
+G_DEFINE_TYPE (IdeBuildStageTransfer, ide_build_stage_transfer, IDE_TYPE_BUILD_STAGE)
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+ide_build_stage_transfer_execute_cb (GObject      *object,
+                                     GAsyncResult *result,
+                                     gpointer      user_data)
+{
+  IdeTransferManager *transfer_manager = (IdeTransferManager *)object;
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(GError) error = NULL;
+
+  g_assert (IDE_IS_TRANSFER_MANAGER (transfer_manager));
+  g_assert (G_IS_ASYNC_RESULT (result));
+  g_assert (G_IS_TASK (task));
+
+  if (!ide_transfer_manager_execute_finish (transfer_manager, result, &error))
+    g_task_return_error (task, g_steal_pointer (&error));
+  else
+    g_task_return_boolean (task, TRUE);
+}
+
+static void
+ide_build_stage_transfer_execute_async (IdeBuildStage       *stage,
+                                        IdeBuildPipeline    *pipeline,
+                                        GCancellable        *cancellable,
+                                        GAsyncReadyCallback  callback,
+                                        gpointer             user_data)
+{
+  IdeBuildStageTransfer *self = (IdeBuildStageTransfer *)stage;
+  g_autoptr(GTask) task = NULL;
+  IdeTransferManager *transfer_manager;
+  IdeContext *context;
+
+  g_assert (IDE_IS_BUILD_STAGE_TRANSFER (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_build_stage_transfer_execute_async);
+
+  if (ide_transfer_has_completed (self->transfer))
+    {
+      g_task_return_boolean (task, TRUE);
+      return;
+    }
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+  transfer_manager = ide_context_get_transfer_manager (context);
+
+  ide_transfer_manager_execute_async (transfer_manager,
+                                      self->transfer,
+                                      cancellable,
+                                      ide_build_stage_transfer_execute_cb,
+                                      g_steal_pointer (&task));
+}
+
+static gboolean
+ide_build_stage_transfer_execute_finish (IdeBuildStage  *stage,
+                                         GAsyncResult   *result,
+                                         GError        **error)
+{
+  g_assert (IDE_IS_BUILD_STAGE_TRANSFER (stage));
+  g_assert (G_IS_TASK (result));
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+static void
+ide_build_stage_transfer_finalize (GObject *object)
+{
+  IdeBuildStageTransfer *self = (IdeBuildStageTransfer *)object;
+
+  g_clear_object (&self->transfer);
+
+  G_OBJECT_CLASS (ide_build_stage_transfer_parent_class)->finalize (object);
+}
+
+static void
+ide_build_stage_transfer_get_property (GObject    *object,
+                                       guint       prop_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  IdeBuildStageTransfer *self = (IdeBuildStageTransfer *)object;
+
+  switch (prop_id)
+    {
+    case PROP_TRANSFER:
+      g_value_set_object (value, self->transfer);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_stage_transfer_set_property (GObject      *object,
+                                       guint         prop_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  IdeBuildStageTransfer *self = (IdeBuildStageTransfer *)object;
+
+  switch (prop_id)
+    {
+    case PROP_TRANSFER:
+      self->transfer = g_value_dup_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_stage_transfer_class_init (IdeBuildStageTransferClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  IdeBuildStageClass *build_stage_class = IDE_BUILD_STAGE_CLASS (klass);
+
+  object_class->finalize = ide_build_stage_transfer_finalize;
+  object_class->get_property = ide_build_stage_transfer_get_property;
+  object_class->set_property = ide_build_stage_transfer_set_property;
+
+  build_stage_class->execute_async = ide_build_stage_transfer_execute_async;
+  build_stage_class->execute_finish = ide_build_stage_transfer_execute_finish;
+
+  properties [PROP_TRANSFER] =
+    g_param_spec_object ("transfer",
+                         "Transfer",
+                         "The transfer to perform as part of the stage",
+                         IDE_TYPE_TRANSFER,
+                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+  
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+ide_build_stage_transfer_init (IdeBuildStageTransfer *self)
+{
+}
diff --git a/libide/buildsystem/ide-simple-builder.h b/libide/buildsystem/ide-build-stage-transfer.h
similarity index 55%
copy from libide/buildsystem/ide-simple-builder.h
copy to libide/buildsystem/ide-build-stage-transfer.h
index 705ef74..8ae4566 100644
--- a/libide/buildsystem/ide-simple-builder.h
+++ b/libide/buildsystem/ide-build-stage-transfer.h
@@ -1,4 +1,4 @@
-/* ide-simple-builder.h
+/* ide-build-stage-transfer.h
  *
  * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
@@ -16,32 +16,20 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_SIMPLE_BUILDER_H
-#define IDE_SIMPLE_BUILDER_H
+#ifndef IDE_BUILD_STAGE_TRANSFER_H
+#define IDE_BUILD_STAGE_TRANSFER_H
 
-#include "buildsystem/ide-builder.h"
-#include "buildsystem/ide-configuration.h"
+#include "buildsystem/ide-build-stage.h"
 
 G_BEGIN_DECLS
 
-#define IDE_TYPE_SIMPLE_BUILDER (ide_simple_builder_get_type())
+#define IDE_TYPE_BUILD_STAGE_TRANSFER (ide_build_stage_transfer_get_type())
 
-G_DECLARE_DERIVABLE_TYPE (IdeSimpleBuilder, ide_simple_builder, IDE, SIMPLE_BUILDER, IdeBuilder)
+G_DECLARE_FINAL_TYPE (IdeBuildStageTransfer, ide_build_stage_transfer, IDE, BUILD_STAGE_TRANSFER, 
IdeBuildStage)
 
-struct _IdeSimpleBuilderClass
-{
-  IdeBuilderClass parent_class;
-
-  gpointer _reserved1;
-  gpointer _reserved2;
-  gpointer _reserved3;
-  gpointer _reserved4;
-  gpointer _reserved5;
-  gpointer _reserved6;
-  gpointer _reserved7;
-  gpointer _reserved8;
-};
+IdeBuildStageTransfer *ide_build_stage_transfer_new (IdeContext  *context,
+                                                     IdeTransfer *transfer);
 
 G_END_DECLS
 
-#endif /* IDE_SIMPLE_BUILDER_H */
+#endif /* IDE_BUILD_STAGE_TRANSFER_H */
diff --git a/libide/buildsystem/ide-build-stage.c b/libide/buildsystem/ide-build-stage.c
new file mode 100644
index 0000000..f148971
--- /dev/null
+++ b/libide/buildsystem/ide-build-stage.c
@@ -0,0 +1,764 @@
+/* ide-build-stage.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-build-stage"
+
+#include "buildsystem/ide-build-pipeline.h"
+#include "buildsystem/ide-build-stage.h"
+#include "subprocess/ide-subprocess.h"
+
+typedef struct
+{
+  gchar               *name;
+  IdeBuildLogObserver  observer;
+  gpointer             observer_data;
+  GDestroyNotify       observer_data_destroy;
+  GTask               *queued_execute;
+  gchar               *stdout_path;
+  GOutputStream       *stdout_stream;
+  gint                 n_pause;
+  guint                completed : 1;
+  guint                transient : 1;
+} IdeBuildStagePrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (IdeBuildStage, ide_build_stage, IDE_TYPE_OBJECT)
+
+enum {
+  PROP_0,
+  PROP_COMPLETED,
+  PROP_NAME,
+  PROP_STDOUT_PATH,
+  PROP_TRANSIENT,
+  N_PROPS
+};
+
+enum {
+  QUERY,
+  N_SIGNALS
+};
+
+static GParamSpec *properties [N_PROPS];
+static guint signals [N_SIGNALS];
+
+typedef struct
+{
+  IdeBuildStage     *self;
+  IdeBuildLogStream  stream_type;
+} Tail;
+
+static Tail *
+tail_new (IdeBuildStage     *self,
+          IdeBuildLogStream  stream_type)
+{
+  Tail *tail;
+
+  tail = g_slice_new0 (Tail);
+  tail->self = g_object_ref (self);
+  tail->stream_type = stream_type;
+
+  return tail;
+}
+
+static void
+tail_free (Tail *tail)
+{
+  g_clear_object (&tail->self);
+  g_slice_free (Tail, tail);
+}
+
+static void
+ide_build_stage_clear_observer (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+  GDestroyNotify notify = priv->observer_data_destroy;
+  gpointer data = priv->observer_data;
+
+  priv->observer_data_destroy = NULL;
+  priv->observer_data = NULL;
+  priv->observer = NULL;
+
+  if (notify != NULL)
+    notify (data);
+}
+
+static gboolean
+ide_build_stage_real_execute (IdeBuildStage     *self,
+                              IdeBuildPipeline  *pipeline,
+                              GCancellable      *cancellable,
+                              GError           **error)
+{
+  g_assert (IDE_IS_BUILD_STAGE (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  return TRUE;
+}
+
+static void
+ide_build_stage_real_execute_worker (GTask        *task,
+                                     gpointer      source_object,
+                                     gpointer      task_data,
+                                     GCancellable *cancellable)
+{
+  IdeBuildStage *self = source_object;
+  IdeBuildPipeline *pipeline = task_data;
+  g_autoptr(GError) error = NULL;
+
+  g_assert (G_IS_TASK (task));
+  g_assert (IDE_IS_BUILD_STAGE (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  if (IDE_BUILD_STAGE_GET_CLASS (self)->execute (self, pipeline, cancellable, &error))
+    g_task_return_boolean (task, TRUE);
+  else
+    g_task_return_error (task, g_steal_pointer (&error));
+}
+
+static void
+ide_build_stage_real_execute_async (IdeBuildStage       *self,
+                                    IdeBuildPipeline    *pipeline,
+                                    GCancellable        *cancellable,
+                                    GAsyncReadyCallback  callback,
+                                    gpointer             user_data)
+{
+  g_autoptr(GTask) task = NULL;
+
+  g_assert (IDE_IS_BUILD_STAGE (self));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_build_stage_real_execute_async);
+  g_task_set_task_data (task, g_object_ref (pipeline), g_object_unref);
+  g_task_run_in_thread (task, ide_build_stage_real_execute_worker);
+}
+
+static gboolean
+ide_build_stage_real_execute_finish (IdeBuildStage  *self,
+                                     GAsyncResult   *result,
+                                     GError        **error)
+{
+  g_assert (IDE_IS_BUILD_STAGE (self));
+  g_assert (G_IS_TASK (result));
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+const gchar *
+ide_build_stage_get_name (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (self), NULL);
+
+  return priv->name;
+}
+
+void
+ide_build_stage_set_name (IdeBuildStage *self,
+                          const gchar   *name)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+
+  if (g_strcmp0 (name, priv->name) != 0)
+    {
+      g_free (priv->name);
+      priv->name = g_strdup (name);
+      g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_NAME]);
+    }
+}
+
+static void
+ide_build_stage_finalize (GObject *object)
+{
+  IdeBuildStage *self = (IdeBuildStage *)object;
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  ide_build_stage_clear_observer (self);
+
+  g_clear_pointer (&priv->name, g_free);
+  g_clear_pointer (&priv->stdout_path, g_free);
+  g_clear_object (&priv->queued_execute);
+  g_clear_object (&priv->stdout_stream);
+
+  G_OBJECT_CLASS (ide_build_stage_parent_class)->finalize (object);
+}
+
+static void
+ide_build_stage_get_property (GObject    *object,
+                              guint       prop_id,
+                              GValue     *value,
+                              GParamSpec *pspec)
+{
+  IdeBuildStage *self = IDE_BUILD_STAGE (object);
+
+  switch (prop_id)
+    {
+    case PROP_COMPLETED:
+      g_value_set_boolean (value, ide_build_stage_get_completed (self));
+      break;
+
+    case PROP_NAME:
+      g_value_set_string (value, ide_build_stage_get_name (self));
+      break;
+
+    case PROP_STDOUT_PATH:
+      g_value_set_string (value, ide_build_stage_get_stdout_path (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_stage_set_property (GObject      *object,
+                              guint         prop_id,
+                              const GValue *value,
+                              GParamSpec   *pspec)
+{
+  IdeBuildStage *self = IDE_BUILD_STAGE (object);
+
+  switch (prop_id)
+    {
+    case PROP_COMPLETED:
+      ide_build_stage_set_completed (self, g_value_get_boolean (value));
+      break;
+
+    case PROP_NAME:
+      ide_build_stage_set_name (self, g_value_get_string (value));
+      break;
+
+    case PROP_STDOUT_PATH:
+      ide_build_stage_set_stdout_path (self, g_value_get_string (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_build_stage_class_init (IdeBuildStageClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = ide_build_stage_finalize;
+  object_class->get_property = ide_build_stage_get_property;
+  object_class->set_property = ide_build_stage_set_property;
+
+  klass->execute = ide_build_stage_real_execute;
+  klass->execute_async = ide_build_stage_real_execute_async;
+  klass->execute_finish = ide_build_stage_real_execute_finish;
+
+  /**
+   * IdeBuildStage:completed:
+   *
+   * The "completed" property is set to %TRUE after the pipeline has
+   * completed processing the stage. When the pipeline invalidates
+   * phases, completed may be reset to %FALSE.
+   */
+  properties [PROP_COMPLETED] =
+    g_param_spec_boolean ("completed",
+                          "Completed",
+                          "If the stage has been completed",
+                          FALSE,
+                          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  /**
+   * IdeBuildStage:name:
+   *
+   * The name of the build stage. This is only used by UI to view
+   * the build pipeline.
+   */
+  properties [PROP_NAME] =
+    g_param_spec_string ("name",
+                         "Name",
+                         "The user visible name of the stage",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  /**
+   * IdeBuildStage:stdout-path:
+   *
+   * The "stdout-path" property allows a build stage to redirect its log
+   * messages to a stdout file. Instead of passing stdout along to the
+   * build pipeline, they will be redirected to this file.
+   *
+   * For safety reasons, the contents are first redirected to a temporary
+   * file and will be redirected to the stdout-path location after the
+   * build stage has completed executing.
+   */
+  properties [PROP_STDOUT_PATH] =
+    g_param_spec_string ("stdout-path",
+                         "Stdout Path",
+                         "Redirect standard output to this path",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  /**
+   * IdeBuildStage:transient:
+   *
+   * If the build stage is transient.
+   *
+   * A transient build stage is removed after the completion of
+   * ide_build_pipeline_execute_async(). This can be a convenient
+   * way to add a temporary item to a build pipeline that should
+   * be immediately discarded.
+   */
+  properties [PROP_TRANSIENT] =
+    g_param_spec_boolean ("transient",
+                          "Transient",
+                          "If the stage should be removed after execution",
+                          FALSE,
+                          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+
+  signals [QUERY] =
+    g_signal_new_class_handler ("query",
+                                G_TYPE_FROM_CLASS (klass),
+                                G_SIGNAL_RUN_LAST,
+                                NULL, NULL, NULL, NULL,
+                                G_TYPE_NONE, 2, IDE_TYPE_BUILD_PIPELINE, G_TYPE_CANCELLABLE);
+}
+
+static void
+ide_build_stage_init (IdeBuildStage *self)
+{
+}
+
+void
+ide_build_stage_execute_async (IdeBuildStage       *self,
+                               IdeBuildPipeline    *pipeline,
+                               GCancellable        *cancellable,
+                               GAsyncReadyCallback  callback,
+                               gpointer             user_data)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+  g_autoptr(GTask) task = NULL;
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  if G_UNLIKELY (priv->stdout_path != NULL)
+    {
+      g_autoptr(GFileOutputStream) stream = NULL;
+      g_autoptr(GFile) file = NULL;
+      g_autoptr(GError) error = NULL;
+
+      file = g_file_new_for_path (priv->stdout_path);
+      stream = g_file_replace (file, NULL, FALSE, G_FILE_CREATE_REPLACE_DESTINATION, cancellable, &error);
+
+      if (stream == NULL)
+        {
+          g_task_report_error (self, callback, user_data,
+                               ide_build_stage_execute_async,
+                               g_steal_pointer (&error));
+          return;
+        }
+
+      g_clear_object (&priv->stdout_stream);
+
+      priv->stdout_stream = g_steal_pointer (&stream);
+    }
+
+  IDE_BUILD_STAGE_GET_CLASS (self)->execute_async (self, pipeline, cancellable, callback, user_data);
+}
+
+gboolean
+ide_build_stage_execute_finish (IdeBuildStage  *self,
+                                GAsyncResult   *result,
+                                GError        **error)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (self), FALSE);
+  g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
+
+  /*
+   * If for some reason execute_finish() is not called (likely due to use of
+   * the build stage without a pipeline, so sort of a programming error) then
+   * we won't clean up the stdout stream. But it gets cleaned up in finalize
+   * anyway, so its safe (if only delayed rename()).
+   *
+   * We can just unref the stream, and the close will happen silently. But we
+   * want to ensure that it wasn't leaked and therefore any future calls on it
+   * would error with G_IO_ERROR_CLOSED.
+   */
+  if (priv->stdout_stream != NULL)
+    {
+      g_output_stream_close (priv->stdout_stream, NULL, NULL);
+      g_clear_object (&priv->stdout_stream);
+    }
+
+  return IDE_BUILD_STAGE_GET_CLASS (self)->execute_finish (self, result, error);
+}
+
+/**
+ * ide_build_stage_set_log_observer:
+ * @self: An #IdeBuildStage
+ * @observer: (scope async): The observer for the log entries
+ * @observer_data: data for @observer
+ * @observer_data_destroy: destroy callback for @observer_data
+ *
+ * Sets the log observer to handle calls to the various stage logging
+ * functions. This will be set by the pipeline to mux logs from all
+ * stages into a unified build log.
+ *
+ * Plugins that need to handle logging from a build stage should set
+ * an observer on the pipeline so that log distribution may be fanned
+ * out to all observers.
+ */
+void
+ide_build_stage_set_log_observer (IdeBuildStage       *self,
+                                  IdeBuildLogObserver  observer,
+                                  gpointer             observer_data,
+                                  GDestroyNotify       observer_data_destroy)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+
+  ide_build_stage_clear_observer (self);
+
+  priv->observer = observer;
+  priv->observer_data = observer_data;
+  priv->observer_data_destroy = observer_data_destroy;
+}
+
+void
+ide_build_stage_log (IdeBuildStage        *self,
+                     IdeBuildLogStream     stream,
+                     const gchar          *message,
+                     gssize                message_len)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  /*
+   * If we are logging to a file instead of the build pipeline, handle that
+   * special case now. It's unlikely (most stages should log to the pipeline)
+   * so mark it as unlikely to prefer a jump to our observer.
+   */
+  if G_UNLIKELY (priv->stdout_stream != NULL)
+    {
+      gsize count;
+
+      if (message_len < 0)
+        message_len = strlen (message);
+
+      if (!g_output_stream_write_all (priv->stdout_stream, message, message_len, &count, NULL, NULL))
+        return;
+
+      if (!g_output_stream_write_all (priv->stdout_stream, "\n", 1, &count, NULL, NULL))
+        return;
+
+      return;
+    }
+
+  if G_LIKELY (priv->observer)
+    priv->observer (stream, message, message_len, priv->observer_data);
+}
+
+gboolean
+ide_build_stage_get_completed (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (self), FALSE);
+
+  return priv->completed;
+}
+
+void
+ide_build_stage_set_completed (IdeBuildStage *self,
+                               gboolean       completed)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+
+  completed = !!completed;
+
+  if (completed != priv->completed)
+    {
+      priv->completed = completed;
+      g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_COMPLETED]);
+    }
+}
+
+void
+ide_build_stage_set_transient (IdeBuildStage *self,
+                               gboolean       transient)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+
+  transient = !!transient;
+
+  if (priv->transient != transient)
+    {
+      priv->transient = transient;
+      g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_TRANSIENT]);
+    }
+}
+
+gboolean
+ide_build_stage_get_transient (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (self), FALSE);
+
+  return priv->transient;
+}
+
+static void
+ide_build_stage_observe_stream_cb (GObject      *object,
+                                   GAsyncResult *result,
+                                   gpointer      user_data)
+{
+  GDataInputStream *stream = (GDataInputStream *)object;
+  g_autofree gchar *line = NULL;
+  Tail *tail = user_data;
+  gsize n_read = 0;
+
+  g_assert (G_IS_DATA_INPUT_STREAM (stream));
+  g_assert (G_IS_ASYNC_RESULT (result));
+  g_assert (tail != NULL);
+
+  line = g_data_input_stream_read_line_finish_utf8 (stream, result, &n_read, NULL);
+
+  if G_LIKELY (line != NULL && n_read > 0 && n_read < G_MAXSSIZE)
+    {
+      ide_build_stage_log (tail->self, tail->stream_type, line, (gssize)n_read);
+      g_data_input_stream_read_line_async (stream,
+                                           G_PRIORITY_DEFAULT,
+                                           NULL,
+                                           ide_build_stage_observe_stream_cb,
+                                           tail);
+      return;
+    }
+
+  tail_free (tail);
+}
+
+
+static void
+ide_build_stage_observe_stream (IdeBuildStage     *self,
+                                IdeBuildLogStream  stream_type,
+                                GInputStream      *stream)
+{
+  g_autoptr(GDataInputStream) data_stream = NULL;
+  Tail *tail;
+
+  g_assert (IDE_IS_BUILD_STAGE (self));
+  g_assert (stream_type == IDE_BUILD_LOG_STDOUT || stream_type == IDE_BUILD_LOG_STDERR);
+  g_assert (G_IS_INPUT_STREAM (stream));
+
+  if (G_IS_DATA_INPUT_STREAM (stream))
+    data_stream = g_object_ref (stream);
+  else
+    data_stream = g_data_input_stream_new (stream);
+
+  tail = tail_new (self, stream_type);
+
+  g_data_input_stream_read_line_async (data_stream,
+                                       G_PRIORITY_DEFAULT,
+                                       NULL,
+                                       ide_build_stage_observe_stream_cb,
+                                       tail);
+}
+
+/**
+ * ide_build_stage_log_subprocess:
+ * @self: An #IdeBuildStage
+ * @subprocess: An #IdeSubprocess
+ *
+ * This function will begin logging @subprocess by reading from the
+ * stdout and stderr streams of the subprocess. You must have created
+ * the subprocess with %G_SUBPROCESS_FLAGS_STDERR_PIPE and
+ * %G_SUBPROCESS_FLAGS_STDOUT_PIPE so that the streams may be read.
+ */
+void
+ide_build_stage_log_subprocess (IdeBuildStage *self,
+                                IdeSubprocess *subprocess)
+{
+  GInputStream *stdout_stream;
+  GInputStream *stderr_stream;
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+  g_return_if_fail (IDE_IS_SUBPROCESS (subprocess));
+
+  stderr_stream = ide_subprocess_get_stderr_pipe (subprocess);
+  stdout_stream = ide_subprocess_get_stdout_pipe (subprocess);
+
+  if (stderr_stream != NULL)
+    ide_build_stage_observe_stream (self, IDE_BUILD_LOG_STDERR, stderr_stream);
+
+  if (stdout_stream != NULL)
+    ide_build_stage_observe_stream (self, IDE_BUILD_LOG_STDOUT, stdout_stream);
+}
+
+void
+ide_build_stage_pause (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+
+  g_atomic_int_inc (&priv->n_pause);
+}
+
+static void
+ide_build_stage_unpause_execute_cb (GObject      *object,
+                                    GAsyncResult *result,
+                                    gpointer      user_data)
+{
+  IdeBuildStage *self = (IdeBuildStage *)object;
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(GError) error = NULL;
+
+  g_assert (IDE_IS_BUILD_STAGE (self));
+  g_assert (G_IS_TASK (task));
+
+  if (!ide_build_stage_execute_finish (self, result, &error))
+    g_task_return_error (task, g_steal_pointer (&error));
+  else
+    g_task_return_boolean (task, TRUE);
+}
+
+void
+ide_build_stage_unpause (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+  g_return_if_fail (priv->n_pause > 0);
+
+  if (g_atomic_int_dec_and_test (&priv->n_pause) && priv->queued_execute != NULL)
+    {
+      g_autoptr(GTask) task = g_steal_pointer (&priv->queued_execute);
+      GCancellable *cancellable = g_task_get_cancellable (task);
+      IdeBuildPipeline *pipeline = g_task_get_task_data (task);
+
+      g_assert (G_IS_TASK (task));
+      g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+      g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+      if (priv->completed)
+        {
+          g_task_return_boolean (task, TRUE);
+          return;
+        }
+
+      ide_build_stage_execute_async (self,
+                                     pipeline,
+                                     cancellable,
+                                     ide_build_stage_unpause_execute_cb,
+                                     g_steal_pointer (&task));
+    }
+}
+
+/**
+ * _ide_build_stage_execute_with_query_async: (skip)
+ *
+ * This function is used to execute the build stage after emitting the
+ * query signal. If the stage is paused after the query, execute will
+ * be delayed until the correct number of ide_build_stage_unpause() calls
+ * have occurred.
+ */
+void
+_ide_build_stage_execute_with_query_async (IdeBuildStage       *self,
+                                           IdeBuildPipeline    *pipeline,
+                                           GCancellable        *cancellable,
+                                           GAsyncReadyCallback  callback,
+                                           gpointer             user_data)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+  g_autoptr(GTask) task = NULL;
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, _ide_build_stage_execute_with_query_async);
+  g_task_set_task_data (task, g_object_ref (pipeline), g_object_unref);
+
+  if (priv->queued_execute != NULL)
+    {
+      g_task_return_new_error (task,
+                               G_IO_ERROR,
+                               G_IO_ERROR_PENDING,
+                               "A build is already in progress");
+      return;
+    }
+
+  priv->queued_execute = g_steal_pointer (&task);
+
+  /*
+   * Pause the pipeline around our query call so that any call to
+   * pause/unpause does not cause the stage to make progress. This allows
+   * us to share the code-path to make progress on the build stage.
+   */
+  ide_build_stage_pause (self);
+  g_signal_emit (self, signals [QUERY], 0, pipeline, cancellable);
+  ide_build_stage_unpause (self);
+}
+
+gboolean
+_ide_build_stage_execute_with_query_finish (IdeBuildStage  *self,
+                                            GAsyncResult   *result,
+                                            GError        **error)
+{
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (result), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+void
+ide_build_stage_set_stdout_path (IdeBuildStage *self,
+                                 const gchar   *stdout_path)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_BUILD_STAGE (self));
+
+  if (g_strcmp0 (stdout_path, priv->stdout_path) != 0)
+    {
+      g_free (priv->stdout_path);
+      priv->stdout_path = g_strdup (stdout_path);
+      g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_STDOUT_PATH]);
+    }
+}
+
+const gchar *
+ide_build_stage_get_stdout_path (IdeBuildStage *self)
+{
+  IdeBuildStagePrivate *priv = ide_build_stage_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_BUILD_STAGE (self), NULL);
+
+  return priv->stdout_path;
+}
diff --git a/libide/buildsystem/ide-build-stage.h b/libide/buildsystem/ide-build-stage.h
new file mode 100644
index 0000000..0f7a3bc
--- /dev/null
+++ b/libide/buildsystem/ide-build-stage.h
@@ -0,0 +1,149 @@
+/* ide-build-stage.h
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_BUILD_STAGE_H
+#define IDE_BUILD_STAGE_H
+
+#include <gio/gio.h>
+
+#include "ide-types.h"
+#include "ide-object.h"
+
+#include "buildsystem/ide-build-log.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_BUILD_STAGE (ide_build_stage_get_type())
+
+G_DECLARE_DERIVABLE_TYPE (IdeBuildStage, ide_build_stage, IDE, BUILD_STAGE, IdeObject)
+
+struct _IdeBuildStageClass
+{
+  IdeObjectClass parent_class;
+
+  /**
+   * IdeBuildStage::execute:
+   *
+   * This vfunc will be run in a thread by the default
+   * IdeBuildStage::execute_async() and IdeBuildStage::execute_finish()
+   * vfuncs.
+   *
+   * Only use thread-safe API from this function.
+   */
+  gboolean (*execute)        (IdeBuildStage        *self,
+                              IdeBuildPipeline     *pipeline,
+                              GCancellable         *cancellable,
+                              GError              **error);
+
+  /**
+   * IdeBuildStage::execute_async:
+   *
+   * Asynchronous version of the #IdeBuildStage API. This is the preferred
+   * way to subclass #IdeBuildStage.
+   */
+  void     (*execute_async)  (IdeBuildStage        *self,
+                              IdeBuildPipeline     *pipeline,
+                              GCancellable         *cancellable,
+                              GAsyncReadyCallback   callback,
+                              gpointer              user_data);
+
+  /**
+   * IdeBuildStage::execute_finish:
+   *
+   * Completes an asynchronous call to ide_build_stage_execute_async().
+   *
+   * Returns: %TRUE if successful; otherwise %FALSE and @error is set.
+   *   Upon failure, the pipeline will be stopped.
+   */
+  gboolean (*execute_finish) (IdeBuildStage        *self,
+                              GAsyncResult         *result,
+                              GError              **error);
+
+  /**
+   * IdeBuildStage::query:
+   * @self: An #IdeBuildStage
+   * @pipeline: An #IdeBuildPipeline
+   * @cancellable: (nullable): A #GCancellable or %NULL
+   *
+   * The #IdeBuildStage::query signal is emitted to request that the
+   * build stage update its completed stage from any external resources.
+   *
+   * This can be useful if you want to use an existing build stage instances
+   * and use a signal to pause forward progress until an external system
+   * has been checked.
+   *
+   * For example, in a signal handler, you may call ide_build_stage_pause()
+   * and perform an external operation. Forward progress of the stage will
+   * be paused until a matching number of ide_build_stage_unpause() calls
+   * have been made.
+   */
+  void     (*query)          (IdeBuildStage        *self,
+                              IdeBuildPipeline     *pipeline,
+                              GCancellable         *cancellable);
+
+  gpointer _reserved1;
+  gpointer _reserved2;
+  gpointer _reserved3;
+  gpointer _reserved4;
+  gpointer _reserved5;
+  gpointer _reserved6;
+  gpointer _reserved7;
+  gpointer _reserved8;
+  gpointer _reserved9;
+  gpointer _reserved10;
+  gpointer _reserved11;
+  gpointer _reserved12;
+};
+
+const gchar   *ide_build_stage_get_name         (IdeBuildStage        *self);
+void           ide_build_stage_set_name         (IdeBuildStage        *self,
+                                                 const gchar          *name);
+void           ide_build_stage_log              (IdeBuildStage        *self,
+                                                 IdeBuildLogStream     stream,
+                                                 const gchar          *message,
+                                                 gssize                message_len);
+void           ide_build_stage_log_subprocess   (IdeBuildStage        *self,
+                                                 IdeSubprocess        *subprocess);
+void           ide_build_stage_set_log_observer (IdeBuildStage        *self,
+                                                 IdeBuildLogObserver   observer,
+                                                 gpointer              observer_data,
+                                                 GDestroyNotify        observer_data_destroy);
+void           ide_build_stage_set_stdout_path  (IdeBuildStage        *self,
+                                                 const gchar          *path);
+const gchar   *ide_build_stage_get_stdout_path  (IdeBuildStage        *self);
+gboolean       ide_build_stage_get_completed    (IdeBuildStage        *self);
+void           ide_build_stage_set_completed    (IdeBuildStage        *self,
+                                                 gboolean              completed);
+gboolean       ide_build_stage_get_transient    (IdeBuildStage        *self);
+void           ide_build_stage_set_transient    (IdeBuildStage        *self,
+                                                 gboolean              transient);
+void           ide_build_stage_execute_async    (IdeBuildStage        *self,
+                                                 IdeBuildPipeline     *pipeline,
+                                                 GCancellable         *cancellable,
+                                                 GAsyncReadyCallback   callback,
+                                                 gpointer              user_data);
+gboolean       ide_build_stage_execute_finish   (IdeBuildStage        *self,
+                                                 GAsyncResult         *result,
+                                                 GError              **error);
+void           ide_build_stage_pause            (IdeBuildStage        *self);
+void           ide_build_stage_unpause          (IdeBuildStage        *self);
+
+G_END_DECLS
+
+#endif /* IDE_BUILD_STAGE_H */
+
diff --git a/libide/buildsystem/ide-build-system.c b/libide/buildsystem/ide-build-system.c
index b5a9c1a..76cc856 100644
--- a/libide/buildsystem/ide-build-system.c
+++ b/libide/buildsystem/ide-build-system.c
@@ -19,12 +19,10 @@
 #define G_LOG_DOMAIN "ide-build-system"
 
 #include "ide-context.h"
+#include "ide-debug.h"
 #include "ide-object.h"
 
 #include "buildsystem/ide-build-system.h"
-#include "buildsystem/ide-builder.h"
-#include "buildsystem/ide-configuration.h"
-#include "buildsystem/ide-configuration-manager.h"
 #include "files/ide-file.h"
 
 G_DEFINE_INTERFACE (IdeBuildSystem, ide_build_system, IDE_TYPE_OBJECT)
@@ -53,28 +51,9 @@ ide_build_system_get_priority (IdeBuildSystem *self)
   return 0;
 }
 
-static IdeBuilder *
-ide_build_system_real_get_builder (IdeBuildSystem    *self,
-                                   IdeConfiguration  *configuration,
-                                   GError           **error)
-{
-  g_assert (IDE_IS_BUILD_SYSTEM (self));
-  g_assert (IDE_IS_CONFIGURATION (configuration));
-
-  g_set_error (error,
-               G_IO_ERROR,
-               G_IO_ERROR_NOT_SUPPORTED,
-               "%s() is not supported on %s build system.",
-               G_STRFUNC, G_OBJECT_TYPE_NAME (self));
-
-  return NULL;
-}
-
 static void
 ide_build_system_default_init (IdeBuildSystemInterface *iface)
 {
-  iface->get_builder = ide_build_system_real_get_builder;
-
   properties [PROP_PROJECT_FILE] =
     g_param_spec_object ("project-file",
                          "Project File",
@@ -161,81 +140,6 @@ ide_build_system_new_finish (GAsyncResult  *result,
   return ret ? IDE_BUILD_SYSTEM (ret) : NULL;
 }
 
-/**
- * ide_build_system_get_builder:
- * @system: The #IdeBuildSystem to perform the build.
- * @configuration: An #IdeConfiguration.
- *
- * This function returns an #IdeBuilder that can be used to perform a
- * build of the project using the configuration specified.
- *
- * See ide_builder_build_async() for more information.
- *
- * Returns: (transfer full): An #IdeBuilder or %NULL and @error is set.
- */
-IdeBuilder *
-ide_build_system_get_builder (IdeBuildSystem    *system,
-                              IdeConfiguration  *configuration,
-                              GError           **error)
-{
-  IdeBuilder *ret;
-
-  g_return_val_if_fail (IDE_IS_BUILD_SYSTEM (system), NULL);
-  g_return_val_if_fail (IDE_IS_CONFIGURATION (configuration), NULL);
-
-  ret = IDE_BUILD_SYSTEM_GET_IFACE (system)->get_builder (system, configuration, error);
-
-  if (ret != NULL)
-    {
-      IdeContext *context;
-
-      context = ide_object_get_context (IDE_OBJECT (system));
-      ide_context_hold_for_object (context, ret);
-    }
-
-  return ret;
-}
-
-static IdeBuilder *
-get_default_builder (IdeBuildSystem  *self,
-                     GError         **error)
-{
-  IdeConfigurationManager *config_manager;
-  IdeConfiguration *config;
-  IdeContext *context;
-
-  g_assert (IDE_IS_BUILD_SYSTEM (self));
-
-  context = ide_object_get_context (IDE_OBJECT (self));
-  g_assert (IDE_IS_CONTEXT (context));
-
-  config_manager = ide_context_get_configuration_manager (context);
-  g_assert (IDE_IS_CONFIGURATION_MANAGER (config_manager));
-
-  config = ide_configuration_manager_get_current (config_manager);
-  g_assert (IDE_IS_CONFIGURATION (config));
-
-  return ide_build_system_get_builder (IDE_BUILD_SYSTEM (self), config, error);
-}
-
-static void
-ide_build_system_get_build_flags_cb (GObject      *object,
-                                     GAsyncResult *result,
-                                     gpointer      user_data)
-{
-  IdeBuilder *builder = (IdeBuilder *)object;
-  g_autoptr(GTask) task = user_data;
-  g_autoptr(GError) error = NULL;
-  g_auto(GStrv) flags = NULL;
-
-  g_assert (IDE_IS_BUILDER (builder));
-
-  if (NULL == (flags = ide_builder_get_build_flags_finish (builder, result, &error)))
-    g_task_return_error (task, g_steal_pointer (&error));
-  else
-    g_task_return_pointer (task, g_steal_pointer (&flags), (GDestroyNotify)g_strfreev);
-}
-
 void
 ide_build_system_get_build_flags_async (IdeBuildSystem      *self,
                                         IdeFile             *file,
@@ -243,28 +147,15 @@ ide_build_system_get_build_flags_async (IdeBuildSystem      *self,
                                         GAsyncReadyCallback  callback,
                                         gpointer             user_data)
 {
-  g_autoptr(GTask) task = NULL;
-  g_autoptr(IdeBuilder) builder = NULL;
-  g_autoptr(GError) error = NULL;
+  IDE_ENTRY;
 
   g_return_if_fail (IDE_IS_BUILD_SYSTEM (self));
   g_return_if_fail (IDE_IS_FILE (file));
   g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
 
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_set_source_tag (task, ide_build_system_get_build_flags_async);
-
-  if (NULL == (builder = get_default_builder (self, &error)))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
+  IDE_BUILD_SYSTEM_GET_IFACE (self)->get_build_flags_async (self, file, cancellable, callback, user_data);
 
-  ide_builder_get_build_flags_async (builder,
-                                     file,
-                                     cancellable,
-                                     ide_build_system_get_build_flags_cb,
-                                     g_steal_pointer (&task));
+  IDE_EXIT;
 }
 
 /**
@@ -277,28 +168,16 @@ ide_build_system_get_build_flags_finish (IdeBuildSystem  *self,
                                          GAsyncResult    *result,
                                          GError         **error)
 {
-  g_return_val_if_fail (IDE_IS_BUILD_SYSTEM (self), NULL);
-  g_return_val_if_fail (G_IS_TASK (result), NULL);
+  gchar **ret;
 
-  return g_task_propagate_pointer (G_TASK (result), error);
-}
+  IDE_ENTRY;
 
-static void
-ide_build_system_get_build_targets_cb (GObject      *object,
-                                       GAsyncResult *result,
-                                       gpointer      user_data)
-{
-  IdeBuilder *builder = (IdeBuilder *)object;
-  g_autoptr(GTask) task = user_data;
-  g_autoptr(GPtrArray) targets = NULL;
-  g_autoptr(GError) error = NULL;
+  g_return_val_if_fail (IDE_IS_BUILD_SYSTEM (self), NULL);
+  g_return_val_if_fail (G_IS_TASK (result), NULL);
 
-  g_assert (IDE_IS_BUILDER (builder));
+  ret = IDE_BUILD_SYSTEM_GET_IFACE (self)->get_build_flags_finish (self, result, error);
 
-  if (NULL == (targets = ide_builder_get_build_targets_finish (builder, result, &error)))
-    g_task_return_error (task, g_steal_pointer (&error));
-  else
-    g_task_return_pointer (task, g_steal_pointer (&targets), (GDestroyNotify)g_ptr_array_unref);
+  IDE_RETURN (ret);
 }
 
 void
@@ -307,26 +186,14 @@ ide_build_system_get_build_targets_async (IdeBuildSystem      *self,
                                           GAsyncReadyCallback  callback,
                                           gpointer             user_data)
 {
-  g_autoptr(GTask) task = NULL;
-  g_autoptr(IdeBuilder) builder = NULL;
-  g_autoptr(GError) error = NULL;
+  IDE_ENTRY;
 
   g_return_if_fail (IDE_IS_BUILD_SYSTEM (self));
   g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
 
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_set_source_tag (task, ide_build_system_get_build_targets_async);
-
-  if (NULL == (builder = get_default_builder (self, &error)))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
+  IDE_BUILD_SYSTEM_GET_IFACE (self)->get_build_targets_async (self, cancellable, callback, user_data);
 
-  ide_builder_get_build_targets_async (builder,
-                                       cancellable,
-                                       ide_build_system_get_build_targets_cb,
-                                       g_steal_pointer (&task));
+  IDE_EXIT;
 }
 
 /**
@@ -340,8 +207,14 @@ ide_build_system_get_build_targets_finish (IdeBuildSystem  *self,
                                            GAsyncResult    *result,
                                            GError         **error)
 {
+  GPtrArray *ret;
+
+  IDE_ENTRY;
+
   g_return_val_if_fail (IDE_IS_BUILD_SYSTEM (self), NULL);
   g_return_val_if_fail (G_IS_TASK (result), NULL);
 
-  return g_task_propagate_pointer (G_TASK (result), error);
+  ret = IDE_BUILD_SYSTEM_GET_IFACE (self)->get_build_targets_finish (self, result, error);
+
+  IDE_RETURN (ret);
 }
diff --git a/libide/buildsystem/ide-build-system.h b/libide/buildsystem/ide-build-system.h
index b1b779e..f8456d5 100644
--- a/libide/buildsystem/ide-build-system.h
+++ b/libide/buildsystem/ide-build-system.h
@@ -33,13 +33,24 @@ struct _IdeBuildSystemInterface
 {
   GTypeInterface parent_iface;
 
-  gint             (*get_priority) (IdeBuildSystem       *system);
-  IdeBuilder      *(*get_builder)  (IdeBuildSystem       *system,
-                                    IdeConfiguration     *configuration,
-                                    GError              **error);
+  gint        (*get_priority)             (IdeBuildSystem       *self);
+  void        (*get_build_flags_async)    (IdeBuildSystem       *self,
+                                           IdeFile              *file,
+                                           GCancellable         *cancellable,
+                                           GAsyncReadyCallback   callback,
+                                           gpointer              user_data);
+  gchar     **(*get_build_flags_finish)   (IdeBuildSystem       *self,
+                                           GAsyncResult         *result,
+                                           GError              **error);
+  void        (*get_build_targets_async)  (IdeBuildSystem       *self,
+                                           GCancellable         *cancellable,
+                                           GAsyncReadyCallback   callback,
+                                           gpointer              user_data);
+  GPtrArray  *(*get_build_targets_finish) (IdeBuildSystem       *self,
+                                           GAsyncResult         *result,
+                                           GError              **error);
 };
 
-gint            ide_build_system_get_priority             (IdeBuildSystem       *self);
 void            ide_build_system_new_async                (IdeContext           *context,
                                                            GFile                *project_file,
                                                            GCancellable         *cancellable,
@@ -47,15 +58,7 @@ void            ide_build_system_new_async                (IdeContext
                                                            gpointer              user_data);
 IdeBuildSystem *ide_build_system_new_finish               (GAsyncResult         *result,
                                                            GError              **error);
-IdeBuilder     *ide_build_system_get_builder              (IdeBuildSystem       *system,
-                                                           IdeConfiguration     *configuration,
-                                                           GError              **error);
-
-/*
- * The following is convenience API for the legacy design to allow
- * querying using the current IdeConfiguration.
- */
-
+gint            ide_build_system_get_priority             (IdeBuildSystem       *self);
 void            ide_build_system_get_build_flags_async    (IdeBuildSystem       *self,
                                                            IdeFile              *file,
                                                            GCancellable         *cancellable,
diff --git a/libide/buildsystem/ide-configuration-manager.c b/libide/buildsystem/ide-configuration-manager.c
index 0d7ddf2..e924fb1 100644
--- a/libide/buildsystem/ide-configuration-manager.c
+++ b/libide/buildsystem/ide-configuration-manager.c
@@ -25,8 +25,6 @@
 #include "ide-internal.h"
 #include "ide-macros.h"
 
-#include "buildsystem/ide-build-command.h"
-#include "buildsystem/ide-build-command-queue.h"
 #include "buildsystem/ide-configuration-manager.h"
 #include "buildsystem/ide-configuration.h"
 #include "buildsystem/ide-environment.h"
@@ -61,7 +59,13 @@ enum {
   LAST_PROP
 };
 
+enum {
+  INVALIDATE,
+  N_SIGNALS
+};
+
 static GParamSpec *properties [LAST_PROP];
+static guint signals [N_SIGNALS];
 
 static void
 load_string (IdeConfiguration *configuration,
@@ -116,36 +120,6 @@ load_environ (IdeConfiguration *configuration,
     }
 }
 
-static void
-load_command_queue (IdeBuildCommandQueue *cmdq,
-                    GKeyFile             *key_file,
-                    const gchar          *group,
-                    const gchar          *name)
-
-{
-  g_auto(GStrv) commands = NULL;
-
-  g_assert (IDE_IS_BUILD_COMMAND_QUEUE (cmdq));
-  g_assert (key_file != NULL);
-  g_assert (group != NULL);
-  g_assert (name != NULL);
-
-  commands = g_key_file_get_string_list (key_file, group, name, NULL, NULL);
-
-  if (commands != NULL)
-    {
-      for (guint i = 0; commands [i]; i++)
-        {
-          g_autoptr(IdeBuildCommand) command = NULL;
-
-          command = g_object_new (IDE_TYPE_BUILD_COMMAND,
-                                  "command-text", commands [i],
-                                  NULL);
-          ide_build_command_queue_append (cmdq, command);
-        }
-    }
-}
-
 static gboolean
 ide_configuration_manager_load (IdeConfigurationManager  *self,
                                 GKeyFile                 *key_file,
@@ -174,24 +148,6 @@ ide_configuration_manager_load (IdeConfigurationManager  *self,
   load_string (configuration, key_file, group, "prefix", "prefix");
   load_string (configuration, key_file, group, "app-id", "app-id");
 
-  if (g_key_file_has_key (key_file, group, "prebuild", NULL))
-    {
-      g_autoptr(IdeBuildCommandQueue) cmdq = NULL;
-
-      cmdq = ide_build_command_queue_new ();
-      load_command_queue (cmdq, key_file, group, "prebuild");
-      _ide_configuration_set_prebuild (configuration, cmdq);
-    }
-
-  if (g_key_file_has_key (key_file, group, "postbuild", NULL))
-    {
-      g_autoptr(IdeBuildCommandQueue) cmdq = NULL;
-
-      cmdq = ide_build_command_queue_new ();
-      load_command_queue (cmdq, key_file, group, "postbuild");
-      _ide_configuration_set_postbuild (configuration, cmdq);
-    }
-
   env_group = g_strdup_printf ("%s.environment", group);
 
   if (g_key_file_has_group (key_file, env_group))
@@ -617,6 +573,18 @@ ide_configuration_manager_class_init (IdeConfigurationManagerClass *klass)
                          (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 
   g_object_class_install_properties (object_class, LAST_PROP, properties);
+
+  /**
+   * IdeConfigurationManager::invalidate:
+   *
+   * This signal is emitted any time a new configuration is selected or the
+   * currently selected configurations state changes.
+   */
+  signals [INVALIDATE] =
+    g_signal_new ("invalidate",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL, NULL, G_TYPE_NONE, 0);
 }
 
 static void
@@ -759,6 +727,8 @@ ide_configuration_manager_set_current (IdeConfigurationManager *self,
 
       g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_CURRENT]);
       g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_CURRENT_DISPLAY_NAME]);
+
+      g_signal_emit (self, signals [INVALIDATE], 0);
     }
 }
 
@@ -796,6 +766,8 @@ ide_configuration_manager_changed (IdeConfigurationManager *self,
   self->change_count++;
 
   ide_configuration_manager_queue_writeback (self);
+
+  g_signal_emit (self, signals [INVALIDATE], 0);
 }
 
 void
diff --git a/libide/buildsystem/ide-configuration.c b/libide/buildsystem/ide-configuration.c
index 1fae34c..1437314 100644
--- a/libide/buildsystem/ide-configuration.c
+++ b/libide/buildsystem/ide-configuration.c
@@ -24,7 +24,6 @@
 #include "ide-debug.h"
 #include "ide-internal.h"
 
-#include "buildsystem/ide-build-command-queue.h"
 #include "buildsystem/ide-configuration.h"
 #include "buildsystem/ide-configuration-manager.h"
 #include "buildsystem/ide-environment.h"
@@ -47,9 +46,6 @@ struct _IdeConfiguration
 
   IdeEnvironment *environment;
 
-  IdeBuildCommandQueue *prebuild;
-  IdeBuildCommandQueue *postbuild;
-
   GHashTable     *internal;
 
   gint            parallelism;
@@ -240,8 +236,6 @@ ide_configuration_finalize (GObject *object)
   IdeConfiguration *self = (IdeConfiguration *)object;
 
   g_clear_object (&self->environment);
-  g_clear_object (&self->prebuild);
-  g_clear_object (&self->postbuild);
 
   g_clear_pointer (&self->internal, g_hash_table_unref);
   g_clear_pointer (&self->config_opts, g_free);
@@ -997,12 +991,6 @@ ide_configuration_snapshot (IdeConfiguration *self)
 
   copy->environment = ide_environment_copy (self->environment);
 
-  if (self->prebuild)
-    copy->prebuild = ide_build_command_queue_copy (self->prebuild);
-
-  if (self->postbuild)
-    copy->postbuild = ide_build_command_queue_copy (self->postbuild);
-
   g_hash_table_iter_init (&iter, self->internal);
   while (g_hash_table_iter_next (&iter, (gpointer *)&key, (gpointer *)&value))
     g_hash_table_insert (copy->internal, g_strdup (key), _value_copy (value));
@@ -1062,78 +1050,6 @@ ide_configuration_get_sequence (IdeConfiguration *self)
   return self->sequence;
 }
 
-/**
- * ide_configuration_get_prebuild:
- *
- * Gets a queue of commands to be run before the standard build process of
- * the configured build system. This can be useful for situations where the
- * user wants to setup some custom commands to prepare their environment.
- *
- * Constrast this with ide_configuration_get_postbuild() which gets commands
- * to be executed after the build system has completed.
- *
- * This function will always return a command queue. The command
- * queue may contain zero or more commands to be executed.
- *
- * Returns: (transfer full): An #IdeBuildCommandQueue.
- */
-IdeBuildCommandQueue *
-ide_configuration_get_prebuild (IdeConfiguration *self)
-{
-  g_return_val_if_fail (IDE_IS_CONFIGURATION (self), NULL);
-
-  if (self->prebuild != NULL)
-    return g_object_ref (self->prebuild);
-
-  return ide_build_command_queue_new ();
-}
-
-/**
- * ide_configuration_get_postbuild:
- *
- * Gets a queue of commands to be run after the standard build process of
- * the configured build system. This can be useful for situations where the
- * user wants to modify something after the build completes.
- *
- * Constrast this with ide_configuration_get_prebuild() which gets commands
- * to be executed before the build system has started.
- *
- * This function will always return a command queue. The command
- * queue may contain zero or more commands to be executed.
- *
- * Returns: (transfer full): An #IdeBuildCommandQueue.
- */
-IdeBuildCommandQueue *
-ide_configuration_get_postbuild (IdeConfiguration *self)
-{
-  g_return_val_if_fail (IDE_IS_CONFIGURATION (self), NULL);
-
-  if (self->postbuild != NULL)
-    return g_object_ref (self->postbuild);
-
-  return ide_build_command_queue_new ();
-}
-
-void
-_ide_configuration_set_prebuild (IdeConfiguration     *self,
-                                 IdeBuildCommandQueue *prebuild)
-{
-  g_assert (IDE_IS_CONFIGURATION (self));
-  g_assert (!prebuild || IDE_IS_BUILD_COMMAND_QUEUE (prebuild));
-
-  g_set_object (&self->prebuild, prebuild);
-}
-
-void
-_ide_configuration_set_postbuild (IdeConfiguration     *self,
-                                  IdeBuildCommandQueue *postbuild)
-{
-  g_assert (IDE_IS_CONFIGURATION (self));
-  g_assert (!postbuild || IDE_IS_BUILD_COMMAND_QUEUE (postbuild));
-
-  g_set_object (&self->postbuild, postbuild);
-}
-
 static GValue *
 ide_configuration_reset_internal_value (IdeConfiguration *self,
                                         const gchar      *key,
@@ -1192,6 +1108,37 @@ ide_configuration_set_internal_string (IdeConfiguration *self,
   g_value_set_string (v, value);
 }
 
+const gchar * const *
+ide_configuration_get_internal_strv (IdeConfiguration *self,
+                                     const gchar      *key)
+{
+  const GValue *v;
+
+  g_return_val_if_fail (IDE_IS_CONFIGURATION (self), NULL);
+  g_return_val_if_fail (key != NULL, NULL);
+
+  v = g_hash_table_lookup (self->internal, key);
+
+  if (v != NULL && G_VALUE_HOLDS (v, G_TYPE_STRV))
+    return g_value_get_boxed (v);
+
+  return NULL;
+}
+
+void
+ide_configuration_set_internal_strv (IdeConfiguration    *self,
+                                     const gchar         *key,
+                                     const gchar * const *value)
+{
+  GValue *v;
+
+  g_return_if_fail (IDE_IS_CONFIGURATION (self));
+  g_return_if_fail (key != NULL);
+
+  v = ide_configuration_reset_internal_value (self, key, G_TYPE_STRV);
+  g_value_set_boxed (v, value);
+}
+
 gboolean
 ide_configuration_get_internal_boolean (IdeConfiguration *self,
                                         const gchar      *key)
diff --git a/libide/buildsystem/ide-configuration.h b/libide/buildsystem/ide-configuration.h
index 96be371..fa8d390 100644
--- a/libide/buildsystem/ide-configuration.h
+++ b/libide/buildsystem/ide-configuration.h
@@ -75,16 +75,19 @@ IdeEnvironment       *ide_configuration_get_environment      (IdeConfiguration
 IdeConfiguration     *ide_configuration_duplicate            (IdeConfiguration  *self);
 IdeConfiguration     *ide_configuration_snapshot             (IdeConfiguration  *self);
 guint                 ide_configuration_get_sequence         (IdeConfiguration  *self);
-IdeBuildCommandQueue *ide_configuration_get_prebuild         (IdeConfiguration  *self);
-IdeBuildCommandQueue *ide_configuration_get_postbuild        (IdeConfiguration  *self);
 const gchar          *ide_configuration_get_app_id           (IdeConfiguration  *self);
 void                  ide_configuration_set_app_id           (IdeConfiguration  *self,
-                                                              const gchar        *app_id);
+                                                              const gchar       *app_id);
 const gchar          *ide_configuration_get_internal_string  (IdeConfiguration  *self,
                                                               const gchar       *key);
 void                  ide_configuration_set_internal_string  (IdeConfiguration  *self,
                                                               const gchar       *key,
                                                               const gchar       *value);
+const gchar * const  *ide_configuration_get_internal_strv    (IdeConfiguration  *self,
+                                                              const gchar       *key);
+void                  ide_configuration_set_internal_strv    (IdeConfiguration  *self,
+                                                              const gchar       *key,
+                                                              const gchar * const *value);
 gboolean              ide_configuration_get_internal_boolean (IdeConfiguration  *self,
                                                               const gchar       *key);
 void                  ide_configuration_set_internal_boolean (IdeConfiguration  *self,
diff --git a/libide/directory/ide-directory-build-system.c b/libide/directory/ide-directory-build-system.c
index 7a25d9a..54bedaa 100644
--- a/libide/directory/ide-directory-build-system.c
+++ b/libide/directory/ide-directory-build-system.c
@@ -22,9 +22,6 @@
 
 #include "ide-context.h"
 
-#include "buildsystem/ide-configuration-manager.h"
-#include "buildsystem/ide-configuration.h"
-#include "buildsystem/ide-simple-builder.h"
 #include "directory/ide-directory-build-system.h"
 #include "projects/ide-project-file.h"
 #include "projects/ide-project-item.h"
@@ -176,28 +173,8 @@ ide_directory_build_system_get_priority (IdeBuildSystem *build_system)
   return 1000000;
 }
 
-static IdeBuilder *
-ide_directory_build_system_get_builder (IdeBuildSystem    *build_system,
-                                        IdeConfiguration  *configuration,
-                                        GError           **error)
-{
-  IdeDirectoryBuildSystem *self = (IdeDirectoryBuildSystem *)build_system;
-  IdeContext *context;
-
-  g_assert (IDE_IS_DIRECTORY_BUILD_SYSTEM (self));
-  g_assert (IDE_IS_CONFIGURATION (configuration));
-
-  context = ide_object_get_context (IDE_OBJECT (build_system));
-
-  return g_object_new (IDE_TYPE_SIMPLE_BUILDER,
-                       "configuration", configuration,
-                       "context", context,
-                       NULL);
-}
-
 static void
 build_system_init (IdeBuildSystemInterface *iface)
 {
   iface->get_priority = ide_directory_build_system_get_priority;
-  iface->get_builder = ide_directory_build_system_get_builder;
 }
diff --git a/libide/ide-context.c b/libide/ide-context.c
index 7e7b0d3..ba2f428 100644
--- a/libide/ide-context.c
+++ b/libide/ide-context.c
@@ -1543,6 +1543,27 @@ ide_context_init_diagnostics_manager (gpointer             source_object,
 }
 
 static void
+ide_context_init_build_manager (gpointer             source_object,
+                                GCancellable        *cancellable,
+                                GAsyncReadyCallback  callback,
+                                gpointer             user_data)
+{
+  g_autoptr(GError) error = NULL;
+  g_autoptr(GTask) task = NULL;
+  IdeContext *self = source_object;
+
+  g_assert (IDE_IS_CONTEXT (self));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+
+  if (!g_initable_init (G_INITABLE (self->build_manager), cancellable, &error))
+    g_task_return_error (task, g_steal_pointer (&error));
+  else
+    g_task_return_boolean (task, TRUE);
+}
+
+static void
 ide_context_init_loaded (gpointer             source_object,
                          GCancellable        *cancellable,
                          GAsyncReadyCallback  callback,
@@ -1588,6 +1609,7 @@ ide_context_init_async (GAsyncInitable      *initable,
                         ide_context_init_search_engine,
                         ide_context_init_runtimes,
                         ide_context_init_configuration_manager,
+                        ide_context_init_build_manager,
                         ide_context_init_diagnostics_manager,
                         ide_context_init_loaded,
                         NULL);
diff --git a/libide/ide-enums.c.in b/libide/ide-enums.c.in
index 0f71244..5013750 100644
--- a/libide/ide-enums.c.in
+++ b/libide/ide-enums.c.in
@@ -5,7 +5,8 @@
 #include "ide-enums.h"
 
 #include "buffers/ide-buffer.h"
-#include "buildsystem/ide-build-result.h"
+#include "buildsystem/ide-build-log.h"
+#include "buildsystem/ide-build-pipeline.h"
 #include "devices/ide-device.h"
 #include "diagnostics/ide-diagnostic.h"
 #include "doap/ide-doap.h"
diff --git a/libide/ide-types.h b/libide/ide-types.h
index 230ebaa..c601342 100644
--- a/libide/ide-types.h
+++ b/libide/ide-types.h
@@ -35,11 +35,13 @@ typedef struct _IdeBufferChangeMonitor         IdeBufferChangeMonitor;
 
 typedef struct _IdeBufferManager               IdeBufferManager;
 
-typedef struct _IdeBuilder                     IdeBuilder;
 typedef struct _IdeBuildCommand                IdeBuildCommand;
 typedef struct _IdeBuildCommandQueue           IdeBuildCommandQueue;
+typedef struct _IdeBuilder                     IdeBuilder;
 typedef struct _IdeBuildManager                IdeBuildManager;
+typedef struct _IdeBuildPipeline               IdeBuildPipeline;
 typedef struct _IdeBuildResult                 IdeBuildResult;
+typedef struct _IdeBuildStage                  IdeBuildStage;
 typedef struct _IdeBuildSystem                 IdeBuildSystem;
 typedef struct _IdeBuildTarget                 IdeBuildTarget;
 
@@ -132,6 +134,7 @@ typedef struct _IdeSymbolResolver              IdeSymbolResolver;
 typedef struct _IdeSymbolResolverInterface     IdeSymbolResolverInterface;
 
 typedef struct _IdeTransferManager             IdeTransferManager;
+typedef struct _IdeTransfer                    IdeTransfer;
 
 typedef struct _IdeUnsavedFiles                IdeUnsavedFiles;
 
diff --git a/libide/ide.h b/libide/ide.h
index 78aa113..88344ea 100644
--- a/libide/ide.h
+++ b/libide/ide.h
@@ -35,19 +35,19 @@ G_BEGIN_DECLS
 #include "buffers/ide-buffer.h"
 #include "buffers/ide-unsaved-file.h"
 #include "buffers/ide-unsaved-files.h"
-#include "buildsystem/ide-build-command.h"
-#include "buildsystem/ide-build-command-queue.h"
 #include "buildsystem/ide-build-manager.h"
-#include "buildsystem/ide-build-result-addin.h"
-#include "buildsystem/ide-build-result.h"
+#include "buildsystem/ide-build-pipeline.h"
+#include "buildsystem/ide-build-pipeline-addin.h"
+#include "buildsystem/ide-build-stage.h"
+#include "buildsystem/ide-build-stage-launcher.h"
+#include "buildsystem/ide-build-stage-mkdirs.h"
+#include "buildsystem/ide-build-stage-transfer.h"
 #include "buildsystem/ide-build-system.h"
 #include "buildsystem/ide-build-target.h"
-#include "buildsystem/ide-builder.h"
 #include "buildsystem/ide-configuration-manager.h"
 #include "buildsystem/ide-configuration.h"
 #include "buildsystem/ide-environment-variable.h"
 #include "buildsystem/ide-environment.h"
-#include "buildsystem/ide-simple-builder.h"
 #include "devices/ide-device-manager.h"
 #include "devices/ide-device-provider.h"
 #include "devices/ide-device.h"
@@ -138,6 +138,7 @@ G_BEGIN_DECLS
 #include "tree/ide-tree-node.h"
 #include "tree/ide-tree-types.h"
 #include "tree/ide-tree.h"
+#include "util/ide-directory-reaper.h"
 #include "util/ide-file-manager.h"
 #include "util/ide-flatpak.h"
 #include "util/ide-glib.h"
diff --git a/libide/runner/ide-run-manager.c b/libide/runner/ide-run-manager.c
index 1792f9b..c5d7ad4 100644
--- a/libide/runner/ide-run-manager.c
+++ b/libide/runner/ide-run-manager.c
@@ -382,26 +382,27 @@ ide_run_manager_install_cb (GObject      *object,
 {
   IdeBuildManager *build_manager = (IdeBuildManager *)object;
   g_autoptr(GTask) task = user_data;
+  g_autoptr(GError) error = NULL;
   IdeRunManager *self;
   IdeBuildTarget *build_target;
   GCancellable *cancellable;
-  GError *error = NULL;
 
   IDE_ENTRY;
 
   g_assert (IDE_IS_BUILD_MANAGER (build_manager));
   g_assert (G_IS_TASK (task));
 
-  if (!ide_build_manager_build_finish (build_manager, result, &error))
+  self = g_task_get_source_object (task);
+  g_assert (IDE_IS_RUN_MANAGER (self));
+
+  if (!ide_build_manager_execute_finish (build_manager, result, &error))
     {
-      g_task_return_error (task, error);
+      g_task_return_error (task, g_steal_pointer (&error));
       IDE_EXIT;
     }
 
-  self = g_task_get_source_object (task);
-  g_assert (IDE_IS_RUN_MANAGER (self));
-
   build_target = ide_run_manager_get_build_target (self);
+
   if (build_target == NULL)
     {
       cancellable = g_task_get_cancellable (task);
@@ -474,7 +475,8 @@ ide_run_manager_do_install_before_run (IdeRunManager *self,
                            self,
                            G_CONNECT_SWAPPED);
 
-  ide_build_manager_install_async (build_manager,
+  ide_build_manager_execute_async (build_manager,
+                                   IDE_BUILD_PHASE_INSTALL,
                                    g_task_get_cancellable (task),
                                    ide_run_manager_install_cb,
                                    g_object_ref (task));
diff --git a/libide/runtimes/ide-runtime.c b/libide/runtimes/ide-runtime.c
index 1476e0e..104040b 100644
--- a/libide/runtimes/ide-runtime.c
+++ b/libide/runtimes/ide-runtime.c
@@ -21,7 +21,6 @@
 #include "ide-context.h"
 #include "ide-debug.h"
 
-#include "buildsystem/ide-builder.h"
 #include "buildsystem/ide-configuration.h"
 #include "projects/ide-project.h"
 #include "runtimes/ide-runtime.h"
@@ -43,87 +42,6 @@ enum {
 
 static GParamSpec *properties [N_PROPS];
 
-static void
-ide_runtime_real_prebuild_async (IdeRuntime          *self,
-                                 IdeBuildResult      *build_result,
-                                 GCancellable        *cancellable,
-                                 GAsyncReadyCallback  callback,
-                                 gpointer             user_data)
-{
-  g_autoptr(GTask) task = NULL;
-
-  g_assert (IDE_IS_RUNTIME (self));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_return_boolean (task, TRUE);
-}
-
-static gboolean
-ide_runtime_real_prebuild_finish (IdeRuntime    *self,
-                                  GAsyncResult  *result,
-                                  GError       **error)
-{
-  g_assert (IDE_IS_RUNTIME (self));
-  g_assert (G_IS_TASK (result));
-
-  return g_task_propagate_boolean (G_TASK (result), error);
-}
-
-static void
-ide_runtime_real_postbuild_async (IdeRuntime          *self,
-                                  IdeBuildResult      *build_result,
-                                  GCancellable        *cancellable,
-                                  GAsyncReadyCallback  callback,
-                                  gpointer             user_data)
-{
-  g_autoptr(GTask) task = NULL;
-
-  g_assert (IDE_IS_RUNTIME (self));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_return_boolean (task, TRUE);
-}
-
-static gboolean
-ide_runtime_real_postbuild_finish (IdeRuntime    *self,
-                                   GAsyncResult  *result,
-                                   GError       **error)
-{
-  g_assert (IDE_IS_RUNTIME (self));
-  g_assert (G_IS_TASK (result));
-
-  return g_task_propagate_boolean (G_TASK (result), error);
-}
-
-static void
-ide_runtime_real_postinstall_async (IdeRuntime          *self,
-                                    IdeBuildResult      *build_result,
-                                    GCancellable        *cancellable,
-                                    GAsyncReadyCallback  callback,
-                                    gpointer             user_data)
-{
-  g_autoptr(GTask) task = NULL;
-
-  g_assert (IDE_IS_RUNTIME (self));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_return_boolean (task, TRUE);
-}
-
-static gboolean
-ide_runtime_real_postinstall_finish (IdeRuntime    *self,
-                                     GAsyncResult  *result,
-                                     GError       **error)
-{
-  g_assert (IDE_IS_RUNTIME (self));
-  g_assert (G_IS_TASK (result));
-
-  return g_task_propagate_boolean (G_TASK (result), error);
-}
-
 static IdeSubprocessLauncher *
 ide_runtime_real_create_launcher (IdeRuntime  *self,
                                   GError     **error)
@@ -337,12 +255,6 @@ ide_runtime_class_init (IdeRuntimeClass *klass)
   object_class->get_property = ide_runtime_get_property;
   object_class->set_property = ide_runtime_set_property;
 
-  klass->prebuild_async = ide_runtime_real_prebuild_async;
-  klass->prebuild_finish = ide_runtime_real_prebuild_finish;
-  klass->postbuild_async = ide_runtime_real_postbuild_async;
-  klass->postbuild_finish = ide_runtime_real_postbuild_finish;
-  klass->postinstall_async = ide_runtime_real_postinstall_async;
-  klass->postinstall_finish = ide_runtime_real_postinstall_finish;
   klass->create_launcher = ide_runtime_real_create_launcher;
   klass->create_runner = ide_runtime_real_create_runner;
   klass->contains_program_in_path = ide_runtime_real_contains_program_in_path;
@@ -440,83 +352,12 @@ ide_runtime_new (IdeContext  *context,
                        NULL);
 }
 
-void
-ide_runtime_prebuild_async (IdeRuntime          *self,
-                            IdeBuildResult      *build_result,
-                            GCancellable        *cancellable,
-                            GAsyncReadyCallback  callback,
-                            gpointer             user_data)
-{
-  g_return_if_fail (IDE_IS_RUNTIME (self));
-  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  IDE_RUNTIME_GET_CLASS (self)->prebuild_async (self, build_result, cancellable, callback, user_data);
-}
-
-gboolean
-ide_runtime_prebuild_finish (IdeRuntime    *self,
-                             GAsyncResult  *result,
-                             GError       **error)
-{
-  g_return_val_if_fail (IDE_IS_RUNTIME (self), FALSE);
-
-  return IDE_RUNTIME_GET_CLASS (self)->prebuild_finish (self, result, error);
-}
-
-void
-ide_runtime_postbuild_async (IdeRuntime          *self,
-                             IdeBuildResult      *build_result,
-                             GCancellable        *cancellable,
-                             GAsyncReadyCallback  callback,
-                             gpointer             user_data)
-{
-  g_return_if_fail (IDE_IS_RUNTIME (self));
-  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  IDE_RUNTIME_GET_CLASS (self)->postbuild_async (self, build_result, cancellable, callback, user_data);
-}
-
-gboolean
-ide_runtime_postbuild_finish (IdeRuntime    *self,
-                              GAsyncResult  *result,
-                              GError       **error)
-{
-  g_return_val_if_fail (IDE_IS_RUNTIME (self), FALSE);
-
-  return IDE_RUNTIME_GET_CLASS (self)->postbuild_finish (self, result, error);
-}
-
-void
-ide_runtime_postinstall_async (IdeRuntime          *self,
-                               IdeBuildResult      *build_result,
-                               GCancellable        *cancellable,
-                               GAsyncReadyCallback  callback,
-                               gpointer             user_data)
-{
-  g_return_if_fail (IDE_IS_RUNTIME (self));
-  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  IDE_RUNTIME_GET_CLASS (self)->postinstall_async (self, build_result, cancellable, callback, user_data);
-}
-
-gboolean
-ide_runtime_postinstall_finish (IdeRuntime    *self,
-                                GAsyncResult  *result,
-                                GError       **error)
-{
-  g_return_val_if_fail (IDE_IS_RUNTIME (self), FALSE);
-
-  return IDE_RUNTIME_GET_CLASS (self)->postinstall_finish (self, result, error);
-}
-
 /**
  * ide_runtime_create_launcher:
  *
  * Creates a launcher for the runtime.
  *
  * This can be used to execute a command within a runtime.
- * If you are doing a build, you probably want to ensure you call
- * ide_runtime_prebuild_async() before using the launcher.
  *
  * It is important that this function can be run from a thread without
  * side effects.
diff --git a/libide/runtimes/ide-runtime.h b/libide/runtimes/ide-runtime.h
index 533a7ee..9bcadae 100644
--- a/libide/runtimes/ide-runtime.h
+++ b/libide/runtimes/ide-runtime.h
@@ -43,22 +43,6 @@ struct _IdeRuntimeClass
 {
   IdeObjectClass parent;
 
-  void                   (*prebuild_async)           (IdeRuntime           *self,
-                                                      IdeBuildResult       *build_result,
-                                                      GCancellable         *cancellable,
-                                                      GAsyncReadyCallback   callback,
-                                                      gpointer              user_data);
-  gboolean               (*prebuild_finish)          (IdeRuntime           *self,
-                                                      GAsyncResult         *result,
-                                                      GError              **error);
-  void                   (*postbuild_async)          (IdeRuntime           *self,
-                                                      IdeBuildResult       *build_result,
-                                                      GCancellable         *cancellable,
-                                                      GAsyncReadyCallback   callback,
-                                                      gpointer              user_data);
-  gboolean               (*postbuild_finish)         (IdeRuntime           *self,
-                                                      GAsyncResult         *result,
-                                                      GError              **error);
   gboolean               (*contains_program_in_path) (IdeRuntime           *self,
                                                       const gchar          *program,
                                                       GCancellable         *cancellable);
@@ -68,14 +52,6 @@ struct _IdeRuntimeClass
                                                       IdeConfiguration     *configuration);
   IdeRunner             *(*create_runner)            (IdeRuntime           *self,
                                                       IdeBuildTarget       *build_target);
-  void                   (*postinstall_async)        (IdeRuntime           *self,
-                                                      IdeBuildResult       *build_result,
-                                                      GCancellable         *cancellable,
-                                                      GAsyncReadyCallback   callback,
-                                                      gpointer              user_data);
-  gboolean               (*postinstall_finish)       (IdeRuntime           *self,
-                                                      GAsyncResult         *result,
-                                                      GError              **error);
   GFile                 *(*translate_file)           (IdeRuntime           *self,
                                                       GFile                *file);
 
@@ -95,30 +71,6 @@ struct _IdeRuntimeClass
 };
 
 GQuark                 ide_runtime_error_quark              (void) G_GNUC_CONST;
-void                   ide_runtime_prebuild_async           (IdeRuntime           *self,
-                                                             IdeBuildResult       *build_result,
-                                                             GCancellable         *cancellable,
-                                                             GAsyncReadyCallback   callback,
-                                                             gpointer              user_data);
-gboolean               ide_runtime_prebuild_finish          (IdeRuntime           *self,
-                                                             GAsyncResult         *result,
-                                                             GError              **error);
-void                   ide_runtime_postbuild_async          (IdeRuntime           *self,
-                                                             IdeBuildResult       *build_result,
-                                                             GCancellable         *cancellable,
-                                                             GAsyncReadyCallback   callback,
-                                                             gpointer              user_data);
-gboolean               ide_runtime_postbuild_finish         (IdeRuntime           *self,
-                                                             GAsyncResult         *result,
-                                                             GError              **error);
-void                   ide_runtime_postinstall_async        (IdeRuntime           *self,
-                                                             IdeBuildResult       *build_result,
-                                                             GCancellable         *cancellable,
-                                                             GAsyncReadyCallback   callback,
-                                                             gpointer              user_data);
-gboolean               ide_runtime_postinstall_finish       (IdeRuntime           *self,
-                                                             GAsyncResult         *result,
-                                                             GError              **error);
 gboolean               ide_runtime_contains_program_in_path (IdeRuntime           *self,
                                                              const gchar          *program,
                                                              GCancellable         *cancellable);
diff --git a/libide/subprocess/ide-subprocess-launcher.c b/libide/subprocess/ide-subprocess-launcher.c
index 6e4a0e9..c39c7ca 100644
--- a/libide/subprocess/ide-subprocess-launcher.c
+++ b/libide/subprocess/ide-subprocess-launcher.c
@@ -659,17 +659,25 @@ ide_subprocess_launcher_overlay_environment (IdeSubprocessLauncher *self,
 
 /**
  * ide_subprocess_launcher_push_args:
- * @args: (array zero-terminated=1) (element-type utf8): the arguments
+ * @self: A #IdeSubprocessLauncher
+ * @args: (array zero-terminated=1) (element-type utf8) (nullable): the arguments
+ *
+ * This function is semantically identical to calling ide_subprocess_launcher_push_argv()
+ * for each element of @args.
+ *
+ * If @args is %NULL, this function does nothing.
  */
 void
 ide_subprocess_launcher_push_args (IdeSubprocessLauncher *self,
                                    const gchar * const   *args)
 {
   g_return_if_fail (IDE_IS_SUBPROCESS_LAUNCHER (self));
-  g_return_if_fail (args != NULL);
 
-  for (guint i = 0; args [i] != NULL; i++)
-    ide_subprocess_launcher_push_argv (self, args [i]);
+  if (args != NULL)
+    {
+      for (guint i = 0; args [i] != NULL; i++)
+        ide_subprocess_launcher_push_argv (self, args [i]);
+    }
 }
 
 gchar *
diff --git a/libide/transfers/ide-transfer-manager.c b/libide/transfers/ide-transfer-manager.c
index 26d5b46..2f9aa61 100644
--- a/libide/transfers/ide-transfer-manager.c
+++ b/libide/transfers/ide-transfer-manager.c
@@ -33,8 +33,11 @@ struct _IdeTransferManager
   GPtrArray *transfers;
 };
 
-static void list_model_iface_init     (GListModelInterface *iface);
-static void ide_transfer_manager_pump (IdeTransferManager  *self);
+static void list_model_iface_init                 (GListModelInterface *iface);
+static void ide_transfer_manager_pump             (IdeTransferManager  *self);
+static void ide_transfer_manager_execute_complete (IdeTransferManager *self,
+                                                   GTask              *task,
+                                                   const GError       *reason);
 
 G_DEFINE_TYPE_EXTENDED (IdeTransferManager, ide_transfer_manager, IDE_TYPE_OBJECT, 0,
                         G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, list_model_iface_init))
@@ -131,9 +134,11 @@ ide_transfer_manager_execute_cb (GObject      *object,
 
       context = ide_object_get_context (IDE_OBJECT (self));
       ide_context_warning (context, "%s", error->message);
-    }
 
-  g_signal_emit (self, signals [TRANSFER_COMPLETED], 0, transfer);
+      g_signal_emit (self, signals [TRANSFER_FAILED], 0, transfer, error);
+    }
+  else
+    g_signal_emit (self, signals [TRANSFER_COMPLETED], 0, transfer);
 
   ide_transfer_manager_pump (self);
 
@@ -363,6 +368,23 @@ ide_transfer_manager_class_init (IdeTransferManagerClass *klass)
                   0,
                   NULL, NULL, NULL,
                   G_TYPE_NONE, 1, IDE_TYPE_TRANSFER);
+
+  /**
+   * IdeTransferManager::transfer-failed:
+   * @self: An #IdeTransferManager
+   * @transfer: An #IdeTransfer
+   * @reason: (in): The reason for the failure.
+   *
+   * This signal is emitted when a transfer has failed to complete
+   * successfully.
+   */
+  signals [TRANSFER_FAILED] =
+    g_signal_new ("transfer-failed",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0,
+                  NULL, NULL, NULL,
+                  G_TYPE_NONE, 2, IDE_TYPE_TRANSFER, G_TYPE_ERROR);
 }
 
 static void
@@ -524,3 +546,114 @@ ide_transfer_manager_get_progress (IdeTransferManager *self)
 
   return total / (gdouble)self->transfers->len;
 }
+
+static void
+ide_transfer_manager_execute_transfer_completed (IdeTransferManager *self,
+                                                 IdeTransfer        *transfer,
+                                                 GTask              *task)
+{
+  IdeTransfer *task_data;
+
+  g_assert (IDE_IS_TRANSFER_MANAGER (self));
+  g_assert (IDE_IS_TRANSFER (transfer));
+  g_assert (G_IS_TASK (task));
+
+  task_data = g_task_get_task_data (task);
+
+  if (task_data == transfer)
+    ide_transfer_manager_execute_complete (self, task, NULL);
+}
+
+static void
+ide_transfer_manager_execute_transfer_failed (IdeTransferManager *self,
+                                              IdeTransfer        *transfer,
+                                              const GError       *reason,
+                                              GTask              *task)
+{
+  IdeTransfer *task_data;
+
+  g_assert (IDE_IS_TRANSFER_MANAGER (self));
+  g_assert (IDE_IS_TRANSFER (transfer));
+  g_assert (reason != NULL);
+  g_assert (G_IS_TASK (task));
+
+  task_data = g_task_get_task_data (task);
+
+  if (task_data == transfer)
+    ide_transfer_manager_execute_complete (self, task, reason);
+}
+
+static void
+ide_transfer_manager_execute_complete (IdeTransferManager *self,
+                                       GTask              *task,
+                                       const GError       *reason)
+{
+  g_assert (IDE_IS_TRANSFER_MANAGER (self));
+  g_assert (G_IS_TASK (task));
+
+  g_signal_handlers_disconnect_by_func (self,
+                                        G_CALLBACK (ide_transfer_manager_execute_transfer_completed),
+                                        task);
+
+  g_signal_handlers_disconnect_by_func (self,
+                                        G_CALLBACK (ide_transfer_manager_execute_transfer_failed),
+                                        task);
+
+  if (reason != NULL)
+    g_task_return_error (task, g_error_copy (reason));
+  else
+    g_task_return_boolean (task, TRUE);
+}
+
+/**
+ * ide_transfer_manager_execute_async:
+ *
+ * This is a convenience function that will queue @transfer into the transfer
+ * manager and execute callback upon completion of the transfer. The success
+ * or failure #GError will be propagated to the caller via
+ * ide_transfer_manager_execute_finish().
+ */
+void
+ide_transfer_manager_execute_async (IdeTransferManager  *self,
+                                    IdeTransfer         *transfer,
+                                    GCancellable        *cancellable,
+                                    GAsyncReadyCallback  callback,
+                                    gpointer             user_data)
+{
+  g_autoptr(GTask) task = NULL;
+
+  g_return_if_fail (IDE_IS_TRANSFER_MANAGER (self));
+  g_return_if_fail (IDE_IS_TRANSFER (transfer));
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_transfer_manager_execute_async);
+  g_task_set_task_data (task, g_object_ref (transfer), g_object_unref);
+
+  g_signal_connect_data (self,
+                         "transfer-completed",
+                         G_CALLBACK (ide_transfer_manager_execute_transfer_completed),
+                         g_object_ref (task),
+                         (GClosureNotify)g_object_unref,
+                         G_CONNECT_SWAPPED);
+
+  g_signal_connect_data (self,
+                         "transfer-failed",
+                         G_CALLBACK (ide_transfer_manager_execute_transfer_failed),
+                         g_object_ref (task),
+                         (GClosureNotify)g_object_unref,
+                         G_CONNECT_SWAPPED);
+
+  ide_transfer_manager_queue (self, transfer);
+}
+
+gboolean
+ide_transfer_manager_execute_finish (IdeTransferManager  *self,
+                                     GAsyncResult        *result,
+                                     GError             **error)
+{
+  g_return_val_if_fail (IDE_IS_TRANSFER_MANAGER (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (result), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
diff --git a/libide/transfers/ide-transfer-manager.h b/libide/transfers/ide-transfer-manager.h
index 2fa41b6..1463c7d 100644
--- a/libide/transfers/ide-transfer-manager.h
+++ b/libide/transfers/ide-transfer-manager.h
@@ -29,17 +29,25 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (IdeTransferManager, ide_transfer_manager, IDE, TRANSFER_MANAGER, IdeObject)
 
-gdouble  ide_transfer_manager_get_progress   (IdeTransferManager *self);
-gboolean ide_transfer_manager_get_has_active (IdeTransferManager *self);
-guint    ide_transfer_manager_get_max_active (IdeTransferManager *self);
-void     ide_transfer_manager_set_max_active (IdeTransferManager *self,
-                                              guint               max_active);
-void     ide_transfer_manager_cancel         (IdeTransferManager *self,
-                                              IdeTransfer        *transfer);
-void     ide_transfer_manager_cancel_all     (IdeTransferManager *self);
-void     ide_transfer_manager_clear          (IdeTransferManager *self);
-void     ide_transfer_manager_queue          (IdeTransferManager *self,
-                                              IdeTransfer        *transfer);
+gdouble  ide_transfer_manager_get_progress   (IdeTransferManager   *self);
+gboolean ide_transfer_manager_get_has_active (IdeTransferManager   *self);
+guint    ide_transfer_manager_get_max_active (IdeTransferManager   *self);
+void     ide_transfer_manager_set_max_active (IdeTransferManager   *self,
+                                              guint                 max_active);
+void     ide_transfer_manager_cancel         (IdeTransferManager   *self,
+                                              IdeTransfer          *transfer);
+void     ide_transfer_manager_cancel_all     (IdeTransferManager   *self);
+void     ide_transfer_manager_clear          (IdeTransferManager   *self);
+void     ide_transfer_manager_queue          (IdeTransferManager   *self,
+                                              IdeTransfer          *transfer);
+void     ide_transfer_manager_execute_async  (IdeTransferManager   *self,
+                                              IdeTransfer          *transfer,
+                                              GCancellable         *cancellable,
+                                              GAsyncReadyCallback   callback,
+                                              gpointer              user_data);
+gboolean ide_transfer_manager_execute_finish (IdeTransferManager   *self,
+                                              GAsyncResult         *result,
+                                              GError              **error);
 
 G_END_DECLS
 
diff --git a/libide/transfers/ide-transfer.c b/libide/transfers/ide-transfer.c
index 4bd1a5a..d4d1832 100644
--- a/libide/transfers/ide-transfer.c
+++ b/libide/transfers/ide-transfer.c
@@ -128,5 +128,8 @@ ide_transfer_has_completed (IdeTransfer *self)
 {
   g_return_val_if_fail (IDE_IS_TRANSFER (self), FALSE);
 
+  if (IDE_TRANSFER_GET_IFACE (self)->has_completed)
+    return IDE_TRANSFER_GET_IFACE (self)->has_completed (self);
+
   return !!g_object_get_data (G_OBJECT (self), "IDE_TRANSFER_COMPLETED");
 }
diff --git a/libide/transfers/ide-transfer.h b/libide/transfers/ide-transfer.h
index a8cdcf0..7dfe7fe 100644
--- a/libide/transfers/ide-transfer.h
+++ b/libide/transfers/ide-transfer.h
@@ -38,6 +38,7 @@ struct _IdeTransferInterface
   gboolean (*execute_finish) (IdeTransfer          *self,
                               GAsyncResult         *result,
                               GError              **error);
+  gboolean (*has_completed)  (IdeTransfer          *self);
 };
 
 gdouble  ide_transfer_get_progress   (IdeTransfer          *self);
diff --git a/libide/util/ide-directory-reaper.c b/libide/util/ide-directory-reaper.c
new file mode 100644
index 0000000..dff24e3
--- /dev/null
+++ b/libide/util/ide-directory-reaper.c
@@ -0,0 +1,353 @@
+/* ide-directory-reaper.c
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-directory-reaper"
+
+#include "ide-directory-reaper.h"
+
+typedef enum
+{
+  PATTERN_FILE,
+  PATTERN_GLOB,
+} PatternType;
+
+typedef struct
+{
+  PatternType type;
+  GTimeSpan   min_age;
+  union {
+    struct {
+      GFile *directory;
+      gchar *glob;
+    } glob;
+    struct {
+      GFile *file;
+    } file;
+  };
+} Pattern;
+
+struct _IdeDirectoryReaper
+{
+  GObject  parent_instance;
+  GArray  *patterns;
+};
+
+G_DEFINE_TYPE (IdeDirectoryReaper, ide_directory_reaper, G_TYPE_OBJECT)
+
+static void
+clear_pattern (gpointer data)
+{
+  Pattern *p = data;
+
+  switch (p->type)
+    {
+    case PATTERN_GLOB:
+      g_clear_object (&p->glob.directory);
+      g_clear_pointer (&p->glob.glob, g_free);
+      break;
+
+    case PATTERN_FILE:
+      g_clear_object (&p->file.file);
+      break;
+
+    default:
+      g_assert_not_reached ();
+    }
+}
+
+static void
+ide_directory_reaper_finalize (GObject *object)
+{
+  IdeDirectoryReaper *self = (IdeDirectoryReaper *)object;
+
+  g_clear_pointer (&self->patterns, g_array_unref);
+
+  G_OBJECT_CLASS (ide_directory_reaper_parent_class)->finalize (object);
+}
+
+static void
+ide_directory_reaper_class_init (IdeDirectoryReaperClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = ide_directory_reaper_finalize;
+}
+
+static void
+ide_directory_reaper_init (IdeDirectoryReaper *self)
+{
+  self->patterns = g_array_new (FALSE, FALSE, sizeof (Pattern));
+  g_array_set_clear_func (self->patterns, clear_pattern);
+}
+
+void
+ide_directory_reaper_add_directory (IdeDirectoryReaper *self,
+                                    GFile              *directory,
+                                    GTimeSpan           min_age)
+{
+  g_return_if_fail (IDE_IS_DIRECTORY_REAPER (self));
+  g_return_if_fail (G_IS_FILE (directory));
+
+  ide_directory_reaper_add_glob (self, directory, NULL, min_age);
+}
+
+void
+ide_directory_reaper_add_glob (IdeDirectoryReaper *self,
+                               GFile              *directory,
+                               const gchar        *glob,
+                               GTimeSpan           min_age)
+{
+  Pattern p = { 0 };
+
+  g_return_if_fail (IDE_IS_DIRECTORY_REAPER (self));
+  g_return_if_fail (G_IS_FILE (directory));
+
+  p.type = PATTERN_GLOB;
+  p.min_age = min_age;
+  p.glob.directory = g_object_ref (directory);
+  p.glob.glob = g_strdup (glob);
+
+  g_array_append_val (self->patterns, p);
+}
+
+void
+ide_directory_reaper_add_file (IdeDirectoryReaper *self,
+                               GFile              *file,
+                               GTimeSpan           min_age)
+{
+  Pattern p = { 0 };
+
+  g_return_if_fail (IDE_IS_DIRECTORY_REAPER (self));
+  g_return_if_fail (G_IS_FILE (file));
+
+  p.type = PATTERN_FILE;
+  p.min_age = min_age;
+  p.file.file = g_object_ref (file);
+
+  g_array_append_val (self->patterns, p);
+}
+
+IdeDirectoryReaper *
+ide_directory_reaper_new (void)
+{
+  return g_object_new (IDE_TYPE_DIRECTORY_REAPER, NULL);
+}
+
+static gboolean
+has_expired (guint64 mtime,
+             guint64 min_age)
+{
+  guint64 now = g_get_real_time () / G_USEC_PER_SEC;
+
+  if (now > min_age)
+    return (now - min_age) > mtime;
+
+  return FALSE;
+}
+
+static void
+ide_directory_reaper_execute_worker (GTask        *task,
+                                     gpointer      source_object,
+                                     gpointer      task_data,
+                                     GCancellable *cancellable)
+{
+  GArray *patterns = task_data;
+
+  g_assert (G_IS_TASK (task));
+  g_assert (IDE_IS_DIRECTORY_REAPER (source_object));
+  g_assert (patterns != NULL);
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  for (guint i = 0; i < patterns->len; i++)
+    {
+      const Pattern *p = &g_array_index (patterns, Pattern, i);
+      g_autoptr(GFileInfo) info = NULL;
+      g_autoptr(GPatternSpec) spec = NULL;
+      g_autoptr(GFileEnumerator) enumerator = NULL;
+      g_autoptr(GError) error = NULL;
+      guint64 v64;
+
+      switch (p->type)
+        {
+        case PATTERN_FILE:
+
+          info = g_file_query_info (p->file.file,
+                                    G_FILE_ATTRIBUTE_TIME_MODIFIED,
+                                    G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                    cancellable,
+                                    &error);
+
+          if (info == NULL)
+            {
+              if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+                g_warning ("%s", error->message);
+              break;
+            }
+
+          v64 = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED);
+
+          if (has_expired (v64, p->min_age))
+            {
+              if (!g_file_delete (p->file.file, cancellable, &error))
+                g_warning ("%s", error->message);
+            }
+
+          break;
+
+        case PATTERN_GLOB:
+
+          spec = g_pattern_spec_new (p->glob.glob);
+
+          if (spec == NULL)
+            {
+              g_warning ("Invalid pattern spec \"%s\"", p->glob.glob);
+              break;
+            }
+
+          enumerator = g_file_enumerate_children (p->glob.directory,
+                                                  G_FILE_ATTRIBUTE_STANDARD_NAME","
+                                                  G_FILE_ATTRIBUTE_TIME_MODIFIED,
+                                                  G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                                  cancellable,
+                                                  &error);
+
+          if (enumerator == NULL)
+            {
+              if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+                g_warning ("%s", error->message);
+              break;
+            }
+
+          while (NULL != (info = g_file_enumerator_next_file (enumerator, cancellable, NULL)))
+            {
+              const gchar *name;
+
+              name = g_file_info_get_name (info);
+              v64 = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED);
+
+              if (has_expired (v64, p->min_age))
+                {
+                  g_autoptr(GFile) file = g_file_get_child (p->glob.directory, name);
+
+                  if (!g_file_delete (file, cancellable, &error))
+                    {
+                      g_warning ("%s", error->message);
+                      g_clear_error (&error);
+                    }
+                }
+
+              g_clear_object (&info);
+            }
+
+          break;
+
+        default:
+          g_assert_not_reached ();
+        }
+    }
+
+  g_task_return_boolean (task, TRUE);
+}
+
+static GArray *
+ide_directory_reaper_copy_state (IdeDirectoryReaper *self)
+{
+  g_autoptr(GArray) copy = NULL;
+
+  g_assert (IDE_IS_DIRECTORY_REAPER (self));
+  g_assert (self->patterns != NULL);
+
+  copy = g_array_new (FALSE, FALSE, sizeof (Pattern));
+  g_array_set_clear_func (copy, clear_pattern);
+
+  for (guint i = 0; i < self->patterns->len; i++)
+    {
+      Pattern p = g_array_index (self->patterns, Pattern, i);
+
+      switch (p.type)
+        {
+        case PATTERN_GLOB:
+          p.glob.directory = g_object_ref (p.glob.directory);
+          p.glob.glob = g_strdup (p.glob.glob);
+          break;
+
+        case PATTERN_FILE:
+          p.file.file = g_object_ref (p.file.file);
+          break;
+
+        default:
+          g_assert_not_reached ();
+        }
+
+      g_array_append_val (copy, p);
+    }
+
+  return g_steal_pointer (&copy);
+}
+
+void
+ide_directory_reaper_execute_async (IdeDirectoryReaper  *self,
+                                    GCancellable        *cancellable,
+                                    GAsyncReadyCallback  callback,
+                                    gpointer             user_data)
+{
+  g_autoptr(GTask) task = NULL;
+  g_autoptr(GArray) copy = NULL;
+
+  g_return_if_fail (IDE_IS_DIRECTORY_REAPER (self));
+  g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  copy = ide_directory_reaper_copy_state (self);
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_directory_reaper_execute_async);
+  g_task_set_task_data (task, g_steal_pointer (&copy), (GDestroyNotify)g_array_unref);
+  g_task_run_in_thread (task, ide_directory_reaper_execute_worker);
+}
+
+gboolean
+ide_directory_reaper_execute_finish (IdeDirectoryReaper  *self,
+                                     GAsyncResult        *result,
+                                     GError             **error)
+{
+  g_return_val_if_fail (IDE_IS_DIRECTORY_REAPER (self), FALSE);
+  g_return_val_if_fail (G_IS_TASK (result), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+gboolean
+ide_directory_reaper_execute (IdeDirectoryReaper  *self,
+                              GCancellable        *cancellable,
+                              GError             **error)
+{
+  g_autoptr(GTask) task = NULL;
+  g_autoptr(GArray) copy = NULL;
+
+  g_return_val_if_fail (IDE_IS_DIRECTORY_REAPER (self), FALSE);
+  g_return_val_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable), FALSE);
+
+  copy = ide_directory_reaper_copy_state (self);
+
+  task = g_task_new (self, cancellable, NULL, NULL);
+  g_task_set_source_tag (task, ide_directory_reaper_execute);
+  g_task_set_task_data (task, g_steal_pointer (&copy), (GDestroyNotify)g_array_unref);
+  g_task_run_in_thread_sync (task, ide_directory_reaper_execute_worker);
+
+  return g_task_propagate_boolean (task, error);
+}
diff --git a/libide/util/ide-directory-reaper.h b/libide/util/ide-directory-reaper.h
new file mode 100644
index 0000000..9602a1a
--- /dev/null
+++ b/libide/util/ide-directory-reaper.h
@@ -0,0 +1,54 @@
+/* ide-directory-reaper.h
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_DIRECTORY_REAPER_H
+#define IDE_DIRECTORY_REAPER_H
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_DIRECTORY_REAPER (ide_directory_reaper_get_type())
+
+G_DECLARE_FINAL_TYPE (IdeDirectoryReaper, ide_directory_reaper, IDE, DIRECTORY_REAPER, GObject)
+
+IdeDirectoryReaper *ide_directory_reaper_new               (void);
+void                ide_directory_reaper_add_directory     (IdeDirectoryReaper   *self,
+                                                            GFile                *directory,
+                                                            GTimeSpan             min_age);
+void                ide_directory_reaper_add_file          (IdeDirectoryReaper   *self,
+                                                            GFile                *file,
+                                                            GTimeSpan             min_age);
+void                ide_directory_reaper_add_glob          (IdeDirectoryReaper   *self,
+                                                            GFile                *directory,
+                                                            const gchar          *glob,
+                                                            GTimeSpan             min_age);
+gboolean            ide_directory_reaper_execute           (IdeDirectoryReaper   *self,
+                                                            GCancellable         *cancellable,
+                                                            GError              **error);
+void                ide_directory_reaper_execute_async     (IdeDirectoryReaper   *self,
+                                                            GCancellable         *cancellable,
+                                                            GAsyncReadyCallback   callback,
+                                                            gpointer              user_data);
+gboolean            ide_directory_reaper_execute_finish    (IdeDirectoryReaper   *self,
+                                                            GAsyncResult         *result,
+                                                            GError              **error);
+
+G_END_DECLS
+
+#endif /* IDE_DIRECTORY_REAPER_H */
diff --git a/libide/workbench/ide-omni-bar.c b/libide/workbench/ide-omni-bar.c
index ef03eaa..2efb28f 100644
--- a/libide/workbench/ide-omni-bar.c
+++ b/libide/workbench/ide-omni-bar.c
@@ -26,7 +26,7 @@
 #include "ide-debug.h"
 
 #include "buildsystem/ide-build-manager.h"
-#include "buildsystem/ide-build-result.h"
+#include "buildsystem/ide-build-pipeline.h"
 #include "buildsystem/ide-configuration.h"
 #include "buildsystem/ide-configuration-manager.h"
 #include "projects/ide-project.h"
@@ -88,11 +88,6 @@ struct _IdeOmniBar
   EggBindingGroup *vcs_bindings;
 
   /*
-   * This is the IdeBuildResult for the last requested built.
-   */
-  IdeBuildResult *build_result;
-
-  /*
    * This tracks the number of times we have shown the current build
    * message while looping between the various messages. After our
    * SETTLE_MESSAGE_COUNT has been reached, we stop flapping between
@@ -101,6 +96,12 @@ struct _IdeOmniBar
   guint seen_count;
 
   /*
+   * Just tracks if we have already done a build so we can change
+   * how we display user messages.
+   */
+  guint did_build : 1;
+
+  /*
    * The following are template children from the GtkBuilder template.
    */
   GtkLabel       *branch_label;
@@ -455,10 +456,17 @@ event_box_leave_notify (IdeOmniBar  *self,
 static void
 ide_omni_bar_next_message (IdeOmniBar *self)
 {
+  IdeBuildManager *build_manager;
   const gchar *name;
+  IdeContext *context;
 
   g_assert (IDE_IS_OMNI_BAR (self));
 
+  if (NULL == (context = ide_widget_get_context (GTK_WIDGET (self))))
+    return;
+
+  build_manager = ide_context_get_build_manager (context);
+
   name = gtk_stack_get_visible_child_name (self->message_stack);
 
   /*
@@ -473,10 +481,10 @@ ide_omni_bar_next_message (IdeOmniBar *self)
       /* Only rotate to build result if we have one and we haven't
        * flapped too many times.
        */
-      if (self->build_result != NULL && self->seen_count < 2)
+      if (self->did_build && self->seen_count < 2)
         gtk_stack_set_visible_child_name (self->message_stack, "build");
     }
-  else if (!ide_build_result_get_running (self->build_result))
+  else if (!ide_build_manager_get_busy (build_manager))
     {
       self->seen_count++;
       gtk_stack_set_visible_child_name (self->message_stack, "config");
@@ -551,33 +559,32 @@ ide_omni_bar_popover_closed (IdeOmniBar *self,
 }
 
 static void
-ide_omni_bar__build_manager__build_started (IdeOmniBar      *self,
-                                            IdeBuildResult  *build_result,
-                                            IdeBuildManager *build_manager)
+ide_omni_bar__build_manager__build_started (IdeOmniBar       *self,
+                                            IdeBuildPipeline *build_pipeline,
+                                            IdeBuildManager  *build_manager)
 {
   g_assert (IDE_IS_OMNI_BAR (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
+  g_assert (IDE_IS_BUILD_PIPELINE (build_pipeline));
   g_assert (IDE_IS_BUILD_MANAGER (build_manager));
 
+  self->did_build = TRUE;
+  self->seen_count = 0;
+
   gtk_widget_hide (GTK_WIDGET (self->popover_failed_label));
   gtk_widget_show (GTK_WIDGET (self->popover_build_cancel_button));
 
-  g_set_object (&self->build_result, build_result);
-
-  self->seen_count = 0;
-
   gtk_stack_set_visible_child_name (self->popover_time_stack, "current-build");
 
   gtk_revealer_set_reveal_child (self->popover_details_revealer, TRUE);
 }
 
 static void
-ide_omni_bar__build_manager__build_failed (IdeOmniBar      *self,
-                                           IdeBuildResult  *build_result,
-                                           IdeBuildManager *build_manager)
+ide_omni_bar__build_manager__build_failed (IdeOmniBar       *self,
+                                           IdeBuildPipeline *build_pipeline,
+                                           IdeBuildManager  *build_manager)
 {
   g_assert (IDE_IS_OMNI_BAR (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
+  g_assert (IDE_IS_BUILD_PIPELINE (build_pipeline));
   g_assert (IDE_IS_BUILD_MANAGER (build_manager));
 
   gtk_widget_set_visible (GTK_WIDGET (self->popover_failed_label), TRUE);
@@ -588,12 +595,12 @@ ide_omni_bar__build_manager__build_failed (IdeOmniBar      *self,
 }
 
 static void
-ide_omni_bar__build_manager__build_finished (IdeOmniBar      *self,
-                                             IdeBuildResult  *build_result,
-                                             IdeBuildManager *build_manager)
+ide_omni_bar__build_manager__build_finished (IdeOmniBar       *self,
+                                             IdeBuildPipeline *build_pipeline,
+                                             IdeBuildManager  *build_manager)
 {
   g_assert (IDE_IS_OMNI_BAR (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
+  g_assert (IDE_IS_BUILD_PIPELINE (build_pipeline));
   g_assert (IDE_IS_BUILD_MANAGER (build_manager));
 
   gtk_widget_hide (GTK_WIDGET (self->popover_build_cancel_button));
@@ -606,7 +613,6 @@ ide_omni_bar_finalize (GObject *object)
 {
   IdeOmniBar *self = (IdeOmniBar *)object;
 
-  g_clear_object (&self->build_result);
   g_clear_object (&self->build_manager_bindings);
   g_clear_object (&self->build_manager_signals);
   g_clear_object (&self->config_manager_bindings);
diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 99fa451..9e44384 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -8,7 +8,6 @@ SUBDIRS = \
        color-picker \
        command-bar \
        comment-code \
-       contributing \
        create-project \
        ctags \
        devhelp \
diff --git a/plugins/autotools/Makefile.am b/plugins/autotools/Makefile.am
index 09e4ebb..8214d43 100644
--- a/plugins/autotools/Makefile.am
+++ b/plugins/autotools/Makefile.am
@@ -8,14 +8,14 @@ libautotools_plugin_la_SOURCES = \
        autotools-plugin.c \
        ide-autotools-application-addin.c \
        ide-autotools-application-addin.h \
-       ide-autotools-builder.c \
-       ide-autotools-builder.h \
+       ide-autotools-autogen-stage.c \
+       ide-autotools-autogen-stage.h \
        ide-autotools-build-system.c \
        ide-autotools-build-system.h \
        ide-autotools-build-target.c \
        ide-autotools-build-target.h \
-       ide-autotools-build-task.c \
-       ide-autotools-build-task.h \
+       ide-autotools-pipeline-addin.c \
+       ide-autotools-pipeline-addin.h \
        ide-autotools-project-miner.c \
        ide-autotools-project-miner.h \
        ide-makecache.c \
diff --git a/plugins/autotools/autotools-plugin.c b/plugins/autotools/autotools-plugin.c
index 9e15698..c1f94e7 100644
--- a/plugins/autotools/autotools-plugin.c
+++ b/plugins/autotools/autotools-plugin.c
@@ -21,12 +21,14 @@
 
 #include "ide-autotools-application-addin.h"
 #include "ide-autotools-build-system.h"
+#include "ide-autotools-pipeline-addin.h"
 #include "ide-autotools-project-miner.h"
 
 void
 peas_register_types (PeasObjectModule *module)
 {
   peas_object_module_register_extension_type (module, IDE_TYPE_APPLICATION_ADDIN, 
IDE_TYPE_AUTOTOOLS_APPLICATION_ADDIN);
+  peas_object_module_register_extension_type (module, IDE_TYPE_BUILD_PIPELINE_ADDIN, 
IDE_TYPE_AUTOTOOLS_PIPELINE_ADDIN);
   peas_object_module_register_extension_type (module, IDE_TYPE_BUILD_SYSTEM, 
IDE_TYPE_AUTOTOOLS_BUILD_SYSTEM);
   peas_object_module_register_extension_type (module, IDE_TYPE_PROJECT_MINER, 
IDE_TYPE_AUTOTOOLS_PROJECT_MINER);
 }
diff --git a/plugins/autotools/ide-autotools-application-addin.c 
b/plugins/autotools/ide-autotools-application-addin.c
index 51917fd..ac55f6a 100644
--- a/plugins/autotools/ide-autotools-application-addin.c
+++ b/plugins/autotools/ide-autotools-application-addin.c
@@ -38,6 +38,10 @@ ide_autotools_application_addin_load (IdeApplicationAddin *addin,
   g_assert (IDE_IS_AUTOTOOLS_APPLICATION_ADDIN (addin));
   g_assert (IDE_IS_APPLICATION (application));
 
+  /*
+   * TODO: Move this to an IdeDirectoryReaper
+   */
+
   path = g_build_filename (g_get_user_cache_dir (),
                            "gnome-builder",
                            "makecache",
diff --git a/plugins/autotools/ide-autotools-autogen-stage.c b/plugins/autotools/ide-autotools-autogen-stage.c
new file mode 100644
index 0000000..99dc54e
--- /dev/null
+++ b/plugins/autotools/ide-autotools-autogen-stage.c
@@ -0,0 +1,179 @@
+/* ide-autotools-autogen-stage.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-autotools-autogen-stage"
+
+#include "ide-autotools-autogen-stage.h"
+
+struct _IdeAutotoolsAutogenStage
+{
+  IdeBuildStage parent_instance;
+
+  gchar *srcdir;
+};
+
+G_DEFINE_TYPE (IdeAutotoolsAutogenStage, ide_autotools_autogen_stage, IDE_TYPE_BUILD_STAGE)
+
+enum {
+  PROP_0,
+  PROP_SRCDIR,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+ide_autotools_autogen_stage_wait_check_cb (GObject      *object,
+                                           GAsyncResult *result,
+                                           gpointer      user_data)
+{
+  IdeSubprocess *subprocess = (IdeSubprocess *)object;
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(GError) error = NULL;
+
+  g_assert (IDE_IS_SUBPROCESS (subprocess));
+  g_assert (G_IS_TASK (task));
+
+  if (!ide_subprocess_wait_check_finish (subprocess, result, &error))
+    g_task_return_error (task, g_steal_pointer (&error));
+  else
+    g_task_return_boolean (task, TRUE);
+}
+
+static void
+ide_autotools_autogen_stage_execute_async (IdeBuildStage       *stage,
+                                           IdeBuildPipeline    *pipeline,
+                                           GCancellable        *cancellable,
+                                           GAsyncReadyCallback  callback,
+                                           gpointer             user_data)
+{
+  IdeAutotoolsAutogenStage *self = (IdeAutotoolsAutogenStage *)stage;
+  g_autofree gchar *autogen_path = NULL;
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  g_autoptr(IdeSubprocess) subprocess = NULL;
+  g_autoptr(GTask) task = NULL;
+  g_autoptr(GError) error = NULL;
+
+  g_assert (IDE_IS_AUTOTOOLS_AUTOGEN_STAGE (self));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_autotools_autogen_stage_execute_async);
+
+  autogen_path = g_build_filename (self->srcdir, "autogen.sh", NULL);
+
+  launcher = ide_build_pipeline_create_launcher (pipeline, &error);
+
+  if (launcher == NULL)
+    {
+      g_task_return_error (task, g_steal_pointer (&error));
+      return;
+    }
+
+  ide_subprocess_launcher_set_cwd (launcher, self->srcdir);
+
+  if (g_file_test (autogen_path, G_FILE_TEST_IS_REGULAR))
+    {
+      ide_subprocess_launcher_push_argv (launcher, autogen_path);
+      ide_subprocess_launcher_setenv (launcher, "NOCONFIGURE", "1", TRUE);
+    }
+  else
+    {
+      ide_subprocess_launcher_push_argv (launcher, "autoreconf");
+      ide_subprocess_launcher_push_argv (launcher, "-fiv");
+    }
+
+  subprocess = ide_subprocess_launcher_spawn (launcher, cancellable, &error);
+
+  if (subprocess == NULL)
+    {
+      g_task_return_error (task, g_steal_pointer (&error));
+      return;
+    }
+
+  ide_build_stage_log_subprocess (stage, subprocess);
+
+  ide_subprocess_wait_check_async (subprocess,
+                                   cancellable,
+                                   ide_autotools_autogen_stage_wait_check_cb,
+                                   g_steal_pointer (&task));
+}
+
+static gboolean
+ide_autotools_autogen_stage_execute_finish (IdeBuildStage  *stage,
+                                            GAsyncResult   *result,
+                                            GError        **error)
+{
+  g_assert (IDE_IS_AUTOTOOLS_AUTOGEN_STAGE (stage));
+  g_assert (G_IS_TASK (result));
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+static void
+ide_autotools_autogen_stage_finalize (GObject *object)
+{
+  IdeAutotoolsAutogenStage *self = (IdeAutotoolsAutogenStage *)object;
+
+  g_clear_pointer (&self->srcdir, g_free);
+
+  G_OBJECT_CLASS (ide_autotools_autogen_stage_parent_class)->finalize (object);
+}
+
+static void
+ide_autotools_autogen_stage_set_property (GObject      *object,
+                                          guint         prop_id,
+                                          const GValue *value,
+                                          GParamSpec   *pspec)
+{
+  IdeAutotoolsAutogenStage *self = (IdeAutotoolsAutogenStage *)object;
+
+  switch (prop_id)
+    {
+    case PROP_SRCDIR:
+      self->srcdir = g_value_dup_string (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_autotools_autogen_stage_class_init (IdeAutotoolsAutogenStageClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  IdeBuildStageClass *stage_class = IDE_BUILD_STAGE_CLASS (klass);
+
+  object_class->finalize = ide_autotools_autogen_stage_finalize;
+  object_class->set_property = ide_autotools_autogen_stage_set_property;
+
+  stage_class->execute_async = ide_autotools_autogen_stage_execute_async;
+  stage_class->execute_finish = ide_autotools_autogen_stage_execute_finish;
+
+  properties [PROP_SRCDIR] =
+    g_param_spec_string ("srcdir", NULL, NULL, NULL,
+                         G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+  
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+ide_autotools_autogen_stage_init (IdeAutotoolsAutogenStage *self)
+{
+}
diff --git a/plugins/autotools/ide-autotools-builder.h b/plugins/autotools/ide-autotools-autogen-stage.h
similarity index 57%
rename from plugins/autotools/ide-autotools-builder.h
rename to plugins/autotools/ide-autotools-autogen-stage.h
index 28be301..5dd2c6c 100644
--- a/plugins/autotools/ide-autotools-builder.h
+++ b/plugins/autotools/ide-autotools-autogen-stage.h
@@ -1,6 +1,6 @@
-/* ide-autotools-builder.h
+/* ide-autotools-autogen-stage.h
  *
- * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,20 +16,17 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_AUTOTOOLS_BUILDER_H
-#define IDE_AUTOTOOLS_BUILDER_H
+#ifndef IDE_AUTOTOOLS_AUTOGEN_STAGE_H
+#define IDE_AUTOTOOLS_AUTOGEN_STAGE_H
 
 #include <ide.h>
 
 G_BEGIN_DECLS
 
-#define IDE_TYPE_AUTOTOOLS_BUILDER (ide_autotools_builder_get_type())
+#define IDE_TYPE_AUTOTOOLS_AUTOGEN_STAGE (ide_autotools_autogen_stage_get_type())
 
-G_DECLARE_FINAL_TYPE (IdeAutotoolsBuilder, ide_autotools_builder, IDE, AUTOTOOLS_BUILDER, IdeBuilder)
-
-GFile    *ide_autotools_builder_get_build_directory (IdeAutotoolsBuilder  *self);
-gboolean  ide_autotools_builder_get_needs_bootstrap (IdeAutotoolsBuilder  *self);
+G_DECLARE_FINAL_TYPE (IdeAutotoolsAutogenStage, ide_autotools_autogen_stage, IDE, AUTOTOOLS_AUTOGEN_STAGE, 
IdeBuildStage)
 
 G_END_DECLS
 
-#endif /* IDE_AUTOTOOLS_BUILDER_H */
+#endif /* IDE_AUTOTOOLS_AUTOGEN_STAGE_H */
diff --git a/plugins/autotools/ide-autotools-build-system.c b/plugins/autotools/ide-autotools-build-system.c
index 2b6e40e..3ddcfa7 100644
--- a/plugins/autotools/ide-autotools-build-system.c
+++ b/plugins/autotools/ide-autotools-build-system.c
@@ -25,7 +25,6 @@
 #include <ide.h>
 
 #include "ide-autotools-build-system.h"
-#include "ide-autotools-builder.h"
 #include "ide-makecache.h"
 
 struct _IdeAutotoolsBuildSystem
@@ -64,30 +63,6 @@ ide_autotools_build_system_get_tarball_name (IdeAutotoolsBuildSystem *self)
   return self->tarball_name;
 }
 
-static IdeBuilder *
-ide_autotools_build_system_get_builder (IdeBuildSystem    *build_system,
-                                        IdeConfiguration  *configuration,
-                                        GError           **error)
-{
-  IdeBuilder *ret;
-  IdeContext *context;
-
-  IDE_ENTRY;
-
-  g_assert (IDE_IS_AUTOTOOLS_BUILD_SYSTEM (build_system));
-  g_assert (IDE_IS_CONFIGURATION (configuration));
-
-  context = ide_object_get_context (IDE_OBJECT (build_system));
-  g_assert (IDE_IS_CONTEXT (context));
-
-  ret = g_object_new (IDE_TYPE_AUTOTOOLS_BUILDER,
-                      "context", context,
-                      "configuration", configuration,
-                      NULL);
-
-  IDE_RETURN (ret);
-}
-
 static gboolean
 is_configure (GFile *file)
 {
@@ -323,6 +298,61 @@ ide_autotools_build_system_get_priority (IdeBuildSystem *system)
 }
 
 static void
+ide_autotools_build_system_get_build_flags_async (IdeBuildSystem      *build_system,
+                                                  IdeFile             *file,
+                                                  GCancellable        *cancellable,
+                                                  GAsyncReadyCallback  callback,
+                                                  gpointer             user_data)
+{
+  IdeAutotoolsBuildSystem *self = (IdeAutotoolsBuildSystem *)build_system;
+  IdeBuildManager *build_manager;
+  IdeContext *context;
+  g_autoptr(GTask) task = NULL;
+
+  IDE_ENTRY;
+
+  g_assert (IDE_IS_AUTOTOOLS_BUILD_SYSTEM (self));
+  g_assert (IDE_IS_FILE (file));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_autotools_build_system_get_build_flags_async);
+
+  /*
+   * To get the build flags for the file, we first need to get the makecache
+   * for the current build pipeline. That requires advancing the pipeline to
+   * at least the CONFIGURE stage so that our CONFIGURE|AFTER step has executed
+   * to generate the Makecache file in $builddir. With that, we can load a new
+   * IdeMakecache (if necessary) and scan the file for build flags.
+   */
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+  build_manager = ide_context_get_build_manager (context);
+
+  g_task_return_pointer (task, g_new0(gchar *, 1), g_free);
+
+#if 0
+  ide_build_manager_execute_async (build_manager,
+                                   IDE_BUILD_PHASE_CONFIGURE,
+                                   ide_autotools_build_system_get_build_flags_execute_cb,
+                                   g_steal_pointer (&task));
+#endif
+
+  IDE_EXIT;
+}
+
+static gchar **
+ide_autotools_build_system_get_build_flags_finish (IdeBuildSystem  *build_system,
+                                                   GAsyncResult    *result,
+                                                   GError         **error)
+{
+  g_assert (IDE_IS_AUTOTOOLS_BUILD_SYSTEM (build_system));
+  g_assert (G_IS_TASK (result));
+
+  return g_task_propagate_pointer (G_TASK (result), error);
+}
+
+static void
 ide_autotools_build_system_finalize (GObject *object)
 {
   IdeAutotoolsBuildSystem *self = (IdeAutotoolsBuildSystem *)object;
@@ -381,7 +411,12 @@ static void
 build_system_iface_init (IdeBuildSystemInterface *iface)
 {
   iface->get_priority = ide_autotools_build_system_get_priority;
-  iface->get_builder = ide_autotools_build_system_get_builder;
+  iface->get_build_flags_async = ide_autotools_build_system_get_build_flags_async;
+  iface->get_build_flags_finish = ide_autotools_build_system_get_build_flags_finish;
+  /* TODO: 
+  iface->get_build_targets_async = ide_autotools_build_system_get_build_targets_async;
+  iface->get_build_targets_finish = ide_autotools_build_system_get_build_targets_finish;
+  */
 }
 
 static void
diff --git a/plugins/autotools/ide-autotools-pipeline-addin.c 
b/plugins/autotools/ide-autotools-pipeline-addin.c
new file mode 100644
index 0000000..9a3d411
--- /dev/null
+++ b/plugins/autotools/ide-autotools-pipeline-addin.c
@@ -0,0 +1,260 @@
+/* ide-autotools-pipeline-addin.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-autotools-pipeline-addin"
+
+#include "ide-autotools-autogen-stage.h"
+#include "ide-autotools-build-system.h"
+#include "ide-autotools-pipeline-addin.h"
+
+static gboolean
+register_autoreconf_stage (IdeAutotoolsPipelineAddin  *self,
+                           IdeBuildPipeline           *pipeline,
+                           GError                    **error)
+{
+  g_autofree gchar *configure_path = NULL;
+  g_autoptr(IdeBuildStage) stage = NULL;
+  IdeContext *context;
+  const gchar *srcdir;
+  gboolean completed;
+  guint stage_id;
+
+  g_assert (IDE_IS_AUTOTOOLS_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+  configure_path = ide_build_pipeline_build_srcdir_path (pipeline, "configure", NULL);
+  completed = g_file_test (configure_path, G_FILE_TEST_IS_REGULAR);
+  srcdir = ide_build_pipeline_get_srcdir (pipeline);
+
+  stage = g_object_new (IDE_TYPE_AUTOTOOLS_AUTOGEN_STAGE,
+                        "completed", completed,
+                        "context", context,
+                        "srcdir", srcdir,
+                        NULL);
+
+  stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_AUTOGEN, 0, stage);
+
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static gboolean
+register_configure_stage (IdeAutotoolsPipelineAddin  *self,
+                          IdeBuildPipeline           *pipeline,
+                          GError                    **error)
+{
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  g_autoptr(IdeBuildStage) stage = NULL;
+  IdeConfiguration *configuration;
+  g_autofree gchar *configure_path = NULL;
+  g_autofree gchar *makefile_path = NULL;
+  const gchar *config_opts;
+  gboolean completed = TRUE;
+  guint stage_id;
+
+  g_assert (IDE_IS_AUTOTOOLS_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  launcher = ide_build_pipeline_create_launcher (pipeline, error);
+
+  if (launcher == NULL)
+    return FALSE;
+
+  configure_path = ide_build_pipeline_build_srcdir_path (pipeline, "configure", NULL);
+  makefile_path = ide_build_pipeline_build_builddir_path (pipeline, "Makefile", NULL);
+  ide_subprocess_launcher_push_argv (launcher, configure_path);
+  ide_subprocess_launcher_set_cwd (launcher, ide_build_pipeline_get_builddir (pipeline));
+
+  /*
+   * Parse the configure options as defined in the build configuration and append
+   * them to configure.
+   */
+
+  configuration = ide_build_pipeline_get_configuration (pipeline);
+  config_opts = ide_configuration_get_config_opts (configuration);
+
+  if (!ide_str_empty0 (config_opts))
+    {
+      g_auto(GStrv) argv = NULL;
+      gint argc;
+
+      if (!g_shell_parse_argv (config_opts, &argc, &argv, error))
+        return FALSE;
+
+      for (guint i = 0; i < argc; i++)
+        ide_subprocess_launcher_push_argv (launcher, argv[i]);
+    }
+
+  /*
+   * If the Makefile exists within the builddir, we will assume the
+   * project has been initially configured correctly. Otherwise, every
+   * time the user opens the project they have to go through a full
+   * re-configure and build.
+   *
+   * Should the user need to perform an autogen, a manual rebuild is
+   * easily achieved so this seems to be the sensible default.
+   *
+   * If we were to do this "correctly", we would look at config.status to
+   * match the "ac_cs_config" variable to what we set. However, that is
+   * influenced by environment variables, so its a bit non-trivial.
+   */
+  completed = g_file_test (makefile_path, G_FILE_TEST_IS_REGULAR);
+
+  stage = g_object_new (IDE_TYPE_BUILD_STAGE_LAUNCHER,
+                        "completed", completed,
+                        "context", ide_object_get_context (IDE_OBJECT (self)),
+                        "launcher", launcher,
+                        NULL);
+
+  stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_AUTOGEN, 0, stage);
+
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+G_GNUC_NULL_TERMINATED static gboolean
+register_make_stage (IdeAutotoolsPipelineAddin  *self,
+                     IdeBuildPipeline           *pipeline,
+                     IdeRuntime                 *runtime,
+                     const gchar                *log_file,
+                     IdeBuildPhase               phase,
+                     GError                    **error,
+                     const gchar                *first_target,
+                     ...)
+{
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  g_autoptr(IdeBuildStage) stage = NULL;
+  IdeConfiguration *configuration;
+  g_autofree gchar *j = NULL;
+  const gchar *make = "make";
+  IdeContext *context;
+  guint stage_id;
+  gint parallel;
+  va_list args;
+
+  g_assert (IDE_IS_AUTOTOOLS_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (IDE_IS_RUNTIME (runtime));
+
+  context = ide_object_get_context (IDE_OBJECT (pipeline));
+  configuration = ide_build_pipeline_get_configuration (pipeline);
+
+  launcher = ide_build_pipeline_create_launcher (pipeline, error);
+
+  if (launcher == NULL)
+    return FALSE;
+
+  if (ide_runtime_contains_program_in_path (runtime, "gmake", NULL))
+    make = "gmake";
+
+  parallel = ide_configuration_get_parallelism (configuration);
+
+  if (parallel == -1)
+    j = g_strdup_printf ("-j%u", g_get_num_processors () + 1);
+  else if (parallel == 0)
+    j = g_strdup_printf ("-j%u", g_get_num_processors ());
+  else
+    j = g_strdup_printf ("-j%u", parallel);
+
+  ide_subprocess_launcher_set_cwd (launcher, ide_build_pipeline_get_builddir (pipeline));
+
+  ide_subprocess_launcher_push_argv (launcher, make);
+  ide_subprocess_launcher_push_argv (launcher, j);
+
+  va_start (args, first_target);
+  do
+    {
+      ide_subprocess_launcher_push_argv (launcher, first_target);
+    }
+  while (NULL != (first_target = va_arg (args, const gchar *)));
+  va_end (args);
+
+  stage = ide_build_stage_launcher_new (context, launcher);
+
+  if (log_file != NULL)
+    ide_build_stage_set_stdout_path (stage, log_file);
+
+  stage_id = ide_build_pipeline_connect (pipeline, phase, 0, stage);
+
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static void
+ide_autotools_pipeline_addin_load (IdeBuildPipelineAddin *addin,
+                                   IdeBuildPipeline      *pipeline)
+{
+  IdeAutotoolsPipelineAddin *self = (IdeAutotoolsPipelineAddin *)addin;
+  g_autofree gchar *makecache = NULL;
+  g_autoptr(GError) error = NULL;
+  IdeConfiguration *config;
+  IdeBuildSystem *build_system;
+  IdeContext *context;
+  IdeRuntime *runtime;
+
+  g_assert (IDE_IS_AUTOTOOLS_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  context = ide_object_get_context (IDE_OBJECT (addin));
+  build_system = ide_context_get_build_system (context);
+  config = ide_build_pipeline_get_configuration (pipeline);
+  runtime = ide_configuration_get_runtime (config);
+
+  if (!IDE_IS_AUTOTOOLS_BUILD_SYSTEM (build_system))
+    return;
+
+  makecache = ide_build_pipeline_build_builddir_path (pipeline, "Makecache", NULL);
+
+  if (!register_autoreconf_stage (self, pipeline, &error) ||
+      !register_configure_stage (self, pipeline, &error) ||
+      !register_make_stage (self, pipeline, runtime, NULL, IDE_BUILD_PHASE_BUILD, &error, "all", NULL) ||
+      !register_make_stage (self, pipeline, runtime, makecache, 
IDE_BUILD_PHASE_CONFIGURE|IDE_BUILD_PHASE_AFTER, &error, "-n", "-p", "-s", NULL) ||
+      !register_make_stage (self, pipeline, runtime, NULL, IDE_BUILD_PHASE_INSTALL, &error, "install", NULL))
+    {
+      g_assert (error != NULL);
+      g_warning ("Failed to create autotools launcher: %s", error->message);
+      return;
+    }
+}
+
+/* GObject Boilerplate */
+
+static void
+addin_iface_init (IdeBuildPipelineAddinInterface *iface)
+{
+  iface->load = ide_autotools_pipeline_addin_load;
+}
+
+struct _IdeAutotoolsPipelineAddin { IdeObject parent; };
+
+G_DEFINE_TYPE_WITH_CODE (IdeAutotoolsPipelineAddin, ide_autotools_pipeline_addin, IDE_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (IDE_TYPE_BUILD_PIPELINE_ADDIN, addin_iface_init))
+
+static void
+ide_autotools_pipeline_addin_class_init (IdeAutotoolsPipelineAddinClass *klass)
+{
+}
+
+static void
+ide_autotools_pipeline_addin_init (IdeAutotoolsPipelineAddin *self)
+{
+}
diff --git a/plugins/gcc/gbp-gcc-build-result-addin.h b/plugins/autotools/ide-autotools-pipeline-addin.h
similarity index 62%
copy from plugins/gcc/gbp-gcc-build-result-addin.h
copy to plugins/autotools/ide-autotools-pipeline-addin.h
index 2a77a0b..d3535f3 100644
--- a/plugins/gcc/gbp-gcc-build-result-addin.h
+++ b/plugins/autotools/ide-autotools-pipeline-addin.h
@@ -1,6 +1,6 @@
-/* gbp-gcc-build-result-addin.h
+/* ide-autotools-pipeline-addin.h
  *
- * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,17 +16,17 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef GBP_GCC_BUILD_RESULT_ADDIN_H
-#define GBP_GCC_BUILD_RESULT_ADDIN_H
+#ifndef IDE_AUTOTOOLS_PIPELINE_ADDIN_H
+#define IDE_AUTOTOOLS_PIPELINE_ADDIN_H
 
 #include <ide.h>
 
 G_BEGIN_DECLS
 
-#define GBP_TYPE_GCC_BUILD_RESULT_ADDIN (gbp_gcc_build_result_addin_get_type())
+#define IDE_TYPE_AUTOTOOLS_PIPELINE_ADDIN (ide_autotools_pipeline_addin_get_type())
 
-G_DECLARE_FINAL_TYPE (GbpGccBuildResultAddin, gbp_gcc_build_result_addin, GBP, GCC_BUILD_RESULT_ADDIN, 
IdeObject)
+G_DECLARE_FINAL_TYPE (IdeAutotoolsPipelineAddin, ide_autotools_pipeline_addin, IDE, 
AUTOTOOLS_PIPELINE_ADDIN, IdeObject)
 
 G_END_DECLS
 
-#endif /* GBP_GCC_BUILD_RESULT_ADDIN_H */
+#endif /* IDE_AUTOTOOLS_PIPELINE_ADDIN_H */
diff --git a/plugins/build-tools/gbp-build-log-panel.c b/plugins/build-tools/gbp-build-log-panel.c
index 59d02e0..940acd8 100644
--- a/plugins/build-tools/gbp-build-log-panel.c
+++ b/plugins/build-tools/gbp-build-log-panel.c
@@ -29,8 +29,7 @@ struct _GbpBuildLogPanel
 {
   PnlDockWidget      parent_instance;
 
-  IdeBuildResult    *result;
-  EggSignalGroup    *signals;
+  IdeBuildPipeline  *pipeline;
   GtkCssProvider    *css;
   GSettings         *settings;
   GtkTextBuffer     *buffer;
@@ -38,11 +37,13 @@ struct _GbpBuildLogPanel
   GtkScrolledWindow *scroller;
   GtkTextView       *text_view;
   GtkTextTag        *stderr_tag;
+
+  guint              log_observer;
 };
 
 enum {
   PROP_0,
-  PROP_RESULT,
+  PROP_PIPELINE,
   LAST_PROP
 };
 
@@ -87,23 +88,26 @@ gbp_build_log_panel_reset_view (GbpBuildLogPanel *self)
 }
 
 static void
-gbp_build_log_panel_log (GbpBuildLogPanel  *self,
-                         IdeBuildResultLog  log,
-                         const gchar       *message,
-                         IdeBuildResult    *result)
+gbp_build_log_panel_log_observer (IdeBuildLogStream  stream,
+                                  const gchar       *message,
+                                  gssize             message_len,
+                                  gpointer           user_data)
 {
+  GbpBuildLogPanel *self = user_data;
   GtkTextMark *insert;
   GtkTextIter iter;
 
   g_assert (GBP_IS_BUILD_LOG_PANEL (self));
   g_assert (message != NULL);
-  g_assert (IDE_IS_BUILD_RESULT (result));
+  g_assert (message_len >= 0);
+  g_assert (message[message_len] == '\0');
 
   gtk_text_buffer_get_end_iter (self->buffer, &iter);
 
-  if (G_LIKELY (log == IDE_BUILD_RESULT_LOG_STDOUT))
+  if G_LIKELY (stream == IDE_BUILD_LOG_STDOUT)
     {
       gtk_text_buffer_insert (self->buffer, &iter, message, -1);
+      gtk_text_buffer_insert (self->buffer, &iter, "\n", 1);
     }
   else
     {
@@ -112,6 +116,7 @@ gbp_build_log_panel_log (GbpBuildLogPanel  *self,
 
       offset = gtk_text_iter_get_offset (&iter);
       gtk_text_buffer_insert (self->buffer, &iter, message, -1);
+      gtk_text_buffer_insert (self->buffer, &iter, "\n", 1);
       gtk_text_buffer_get_iter_at_offset (self->buffer, &begin, offset);
       gtk_text_buffer_apply_tag (self->buffer, self->stderr_tag, &begin, &iter);
     }
@@ -121,17 +126,33 @@ gbp_build_log_panel_log (GbpBuildLogPanel  *self,
 }
 
 void
-gbp_build_log_panel_set_result (GbpBuildLogPanel *self,
-                                IdeBuildResult   *result)
+gbp_build_log_panel_set_pipeline (GbpBuildLogPanel *self,
+                                  IdeBuildPipeline *pipeline)
 {
   g_return_if_fail (GBP_IS_BUILD_LOG_PANEL (self));
-  g_return_if_fail (!result || IDE_IS_BUILD_RESULT (result));
+  g_return_if_fail (!pipeline || IDE_IS_BUILD_PIPELINE (pipeline));
 
-  if (g_set_object (&self->result, result))
+  if (pipeline != self->pipeline)
     {
-      gbp_build_log_panel_reset_view (self);
-      egg_signal_group_set_target (self->signals, result);
+      if (self->pipeline != NULL)
+        {
+          ide_build_pipeline_remove_log_observer (self->pipeline, self->log_observer);
+          self->log_observer = 0;
+          g_clear_object (&self->pipeline);
+        }
+
+      if (pipeline != NULL)
+        {
+          self->pipeline = g_object_ref (pipeline);
+          self->log_observer =
+            ide_build_pipeline_add_log_observer (self->pipeline,
+                                                 gbp_build_log_panel_log_observer,
+                                                 self,
+                                                 NULL);
+        }
     }
+
+  gbp_build_log_panel_reset_view (self);
 }
 
 static void
@@ -174,8 +195,7 @@ gbp_build_log_panel_finalize (GObject *object)
 
   self->stderr_tag = NULL;
 
-  g_clear_object (&self->result);
-  g_clear_object (&self->signals);
+  g_clear_object (&self->pipeline);
   g_clear_object (&self->css);
   g_clear_object (&self->settings);
 
@@ -183,6 +203,16 @@ gbp_build_log_panel_finalize (GObject *object)
 }
 
 static void
+gbp_build_log_panel_dispose (GObject *object)
+{
+  GbpBuildLogPanel *self = (GbpBuildLogPanel *)object;
+
+  gbp_build_log_panel_set_pipeline (self, NULL);
+
+  G_OBJECT_CLASS (gbp_build_log_panel_parent_class)->dispose (object);
+}
+
+static void
 gbp_build_log_panel_get_property (GObject    *object,
                                   guint       prop_id,
                                   GValue     *value,
@@ -192,8 +222,8 @@ gbp_build_log_panel_get_property (GObject    *object,
 
   switch (prop_id)
     {
-    case PROP_RESULT:
-      g_value_set_object (value, self->result);
+    case PROP_PIPELINE:
+      g_value_set_object (value, self->pipeline);
       break;
 
     default:
@@ -211,8 +241,8 @@ gbp_build_log_panel_set_property (GObject      *object,
 
   switch (prop_id)
     {
-    case PROP_RESULT:
-      gbp_build_log_panel_set_result (self, g_value_get_object (value));
+    case PROP_PIPELINE:
+      gbp_build_log_panel_set_pipeline (self, g_value_get_object (value));
       break;
 
     default:
@@ -226,6 +256,7 @@ gbp_build_log_panel_class_init (GbpBuildLogPanelClass *klass)
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
+  object_class->dispose = gbp_build_log_panel_dispose;
   object_class->finalize = gbp_build_log_panel_finalize;
   object_class->get_property = gbp_build_log_panel_get_property;
   object_class->set_property = gbp_build_log_panel_set_property;
@@ -234,11 +265,11 @@ gbp_build_log_panel_class_init (GbpBuildLogPanelClass *klass)
   gtk_widget_class_set_template_from_resource (widget_class, 
"/org/gnome/builder/plugins/build-tools-plugin/gbp-build-log-panel.ui");
   gtk_widget_class_bind_template_child (widget_class, GbpBuildLogPanel, scroller);
 
-  properties [PROP_RESULT] =
-    g_param_spec_object ("result",
+  properties [PROP_PIPELINE] =
+    g_param_spec_object ("pipeline",
                          "Result",
                          "Result",
-                         IDE_TYPE_BUILD_RESULT,
+                         IDE_TYPE_BUILD_PIPELINE,
                          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 
   g_object_class_install_properties (object_class, LAST_PROP, properties);
@@ -255,14 +286,6 @@ gbp_build_log_panel_init (GbpBuildLogPanel *self)
 
   gbp_build_log_panel_reset_view (self);
 
-  self->signals = egg_signal_group_new (IDE_TYPE_BUILD_RESULT);
-
-  egg_signal_group_connect_object (self->signals,
-                                   "log",
-                                   G_CALLBACK (gbp_build_log_panel_log),
-                                   self,
-                                   G_CONNECT_SWAPPED);
-
   self->settings = g_settings_new ("org.gnome.builder.terminal");
   g_signal_connect_object (self->settings,
                            "changed::font-name",
diff --git a/plugins/build-tools/gbp-build-log-panel.h b/plugins/build-tools/gbp-build-log-panel.h
index df407ba..f4d5079 100644
--- a/plugins/build-tools/gbp-build-log-panel.h
+++ b/plugins/build-tools/gbp-build-log-panel.h
@@ -19,7 +19,6 @@
 #ifndef GBP_BUILD_LOG_PANEL_H
 #define GBP_BUILD_LOG_PANEL_H
 
-#include <gtk/gtk.h>
 #include <ide.h>
 
 G_BEGIN_DECLS
@@ -28,8 +27,8 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (GbpBuildLogPanel, gbp_build_log_panel, GBP, BUILD_LOG_PANEL, PnlDockWidget)
 
-void gbp_build_log_panel_set_result (GbpBuildLogPanel *self,
-                                     IdeBuildResult   *result);
+void gbp_build_log_panel_set_pipeline (GbpBuildLogPanel *self,
+                                       IdeBuildPipeline *pipeline);
 
 G_END_DECLS
 
diff --git a/plugins/build-tools/gbp-build-panel.c b/plugins/build-tools/gbp-build-panel.c
index d875ef9..2f05900 100644
--- a/plugins/build-tools/gbp-build-panel.c
+++ b/plugins/build-tools/gbp-build-panel.c
@@ -28,10 +28,8 @@ struct _GbpBuildPanel
 {
   PnlDockWidget        parent_instance;
 
-  IdeBuildResult      *result;
-  EggSignalGroup      *signals;
-  EggBindingGroup     *bindings;
   GHashTable          *diags_hash;
+  IdeBuildPipeline    *pipeline;
 
   GtkListStore        *diagnostics_store;
   GtkCellRendererText *diagnostics_text;
@@ -51,23 +49,23 @@ struct _GbpBuildPanel
 G_DEFINE_TYPE (GbpBuildPanel, gbp_build_panel, PNL_TYPE_DOCK_WIDGET)
 
 enum {
-  PROP_0,
-  PROP_RESULT,
-  LAST_PROP
-};
-
-enum {
   COLUMN_DIAGNOSTIC,
   COLUMN_TEXT,
   LAST_COLUMN
 };
 
-static GParamSpec *properties [LAST_PROP];
+enum {
+  PROP_0,
+  PROP_PIPELINE,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
 
 static void
-gbp_build_panel_diagnostic (GbpBuildPanel  *self,
-                            IdeDiagnostic  *diagnostic,
-                            IdeBuildResult *result)
+gbp_build_panel_diagnostic (GbpBuildPanel    *self,
+                            IdeDiagnostic    *diagnostic,
+                            IdeBuildPipeline *pipeline)
 {
   IdeDiagnosticSeverity severity;
   guint hash;
@@ -76,7 +74,7 @@ gbp_build_panel_diagnostic (GbpBuildPanel  *self,
 
   g_assert (GBP_IS_BUILD_PANEL (self));
   g_assert (diagnostic != NULL);
-  g_assert (IDE_IS_BUILD_RESULT (result));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
 
   severity = ide_diagnostic_get_severity (diagnostic);
 
@@ -153,15 +151,20 @@ gbp_build_panel_update_running_time (GbpBuildPanel *self)
 {
   g_assert (GBP_IS_BUILD_PANEL (self));
 
-  if (self->result != NULL)
+  if (self->pipeline != NULL)
     {
+      IdeContext *context;
+      IdeBuildManager *build_manager;
       GTimeSpan span;
       guint hours;
       guint minutes;
       guint seconds;
       gchar *text;
 
-      span = ide_build_result_get_running_time (self->result);
+      context = ide_widget_get_context (GTK_WIDGET (self));
+      build_manager = ide_context_get_build_manager (context);
+
+      span = ide_build_manager_get_running_time (build_manager);
 
       hours = span / G_TIME_SPAN_HOUR;
       minutes = (span % G_TIME_SPAN_HOUR) / G_TIME_SPAN_MINUTE;
@@ -178,22 +181,25 @@ gbp_build_panel_update_running_time (GbpBuildPanel *self)
 }
 
 static void
-gbp_build_panel_connect (GbpBuildPanel  *self,
-                         IdeBuildResult *result)
+gbp_build_panel_connect (GbpBuildPanel    *self,
+                         IdeBuildPipeline *pipeline)
 {
   g_return_if_fail (GBP_IS_BUILD_PANEL (self));
-  g_return_if_fail (IDE_IS_BUILD_RESULT (result));
-  g_return_if_fail (self->result == NULL);
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_return_if_fail (self->pipeline == NULL);
 
-  self->result = g_object_ref (result);
+  self->pipeline = g_object_ref (pipeline);
   self->error_count = 0;
   self->warning_count = 0;
 
   gtk_label_set_label (self->warnings_label, "—");
   gtk_label_set_label (self->errors_label, "—");
 
-  egg_signal_group_set_target (self->signals, result);
-  egg_binding_group_set_source (self->bindings, result);
+  g_signal_connect_object (pipeline,
+                           "diagnostic",
+                           G_CALLBACK (gbp_build_panel_diagnostic),
+                           self,
+                           G_CONNECT_SWAPPED);
 
   gtk_revealer_set_reveal_child (self->status_revealer, TRUE);
 
@@ -204,57 +210,38 @@ static void
 gbp_build_panel_disconnect (GbpBuildPanel *self)
 {
   g_return_if_fail (GBP_IS_BUILD_PANEL (self));
+  g_return_if_fail (IDE_IS_BUILD_PIPELINE (self->pipeline));
+
+  g_signal_handlers_disconnect_by_func (self->pipeline,
+                                        G_CALLBACK (gbp_build_panel_diagnostic),
+                                        self);
+  g_clear_object (&self->pipeline);
 
   gtk_revealer_set_reveal_child (self->status_revealer, FALSE);
 
-  egg_signal_group_set_target (self->signals, NULL);
-  egg_binding_group_set_source (self->bindings, NULL);
-  g_clear_object (&self->result);
   g_hash_table_remove_all (self->diags_hash);
   gtk_list_store_clear (self->diagnostics_store);
   gtk_stack_set_visible_child_name (self->stack, "empty-state");
 }
 
 void
-gbp_build_panel_set_result (GbpBuildPanel  *self,
-                            IdeBuildResult *result)
+gbp_build_panel_set_pipeline (GbpBuildPanel    *self,
+                              IdeBuildPipeline *pipeline)
 {
   g_return_if_fail (GBP_IS_BUILD_PANEL (self));
-  g_return_if_fail (!result || IDE_IS_BUILD_RESULT (result));
+  g_return_if_fail (!pipeline || IDE_IS_BUILD_PIPELINE (pipeline));
 
-  if (result != self->result)
+  if (pipeline != self->pipeline)
     {
-      if (self->result)
+      if (self->pipeline)
         gbp_build_panel_disconnect (self);
 
-      if (result)
-        gbp_build_panel_connect (self, result);
+      if (pipeline)
+        gbp_build_panel_connect (self, pipeline);
     }
 }
 
 static void
-gbp_build_panel_notify_running (GbpBuildPanel  *self,
-                                GParamSpec     *pspec,
-                                IdeBuildResult *result)
-{
-  g_assert (GBP_IS_BUILD_PANEL (self));
-  g_assert (IDE_IS_BUILD_RESULT (result));
-
-  gbp_build_panel_update_running_time (self);
-}
-
-static void
-gbp_build_panel_notify_running_time (GbpBuildPanel  *self,
-                                     GParamSpec     *pspec,
-                                     IdeBuildResult *result)
-{
-  g_assert (GBP_IS_BUILD_PANEL (self));
-  g_assert (IDE_IS_BUILD_RESULT (result));
-
-  gbp_build_panel_update_running_time (self);
-}
-
-static void
 gbp_build_panel_diagnostic_activated (GbpBuildPanel     *self,
                                       GtkTreePath       *path,
                                       GtkTreeViewColumn *colun,
@@ -371,15 +358,61 @@ gbp_build_panel_text_func (GtkCellLayout   *layout,
 }
 
 static void
+gbp_build_panel_context_handler (GtkWidget  *widget,
+                                 IdeContext *context)
+{
+  GbpBuildPanel *self = (GbpBuildPanel *)widget;
+  IdeBuildManager *build_manager;
+
+  IDE_ENTRY;
+
+  g_assert (GBP_IS_BUILD_PANEL (self));
+  g_assert (!context || IDE_IS_CONTEXT (context));
+
+  if (context == NULL)
+    IDE_EXIT;
+
+  build_manager = ide_context_get_build_manager (context);
+
+  g_object_bind_property (build_manager, "message",
+                          self->status_label, "label",
+                          G_BINDING_SYNC_CREATE);
+
+  g_signal_connect_object (build_manager,
+                           "notify::running-time",
+                           G_CALLBACK (gbp_build_panel_update_running_time),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  g_signal_connect_object (build_manager,
+                           "build-started",
+                           G_CALLBACK (gbp_build_panel_update_running_time),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  g_signal_connect_object (build_manager,
+                           "build-finished",
+                           G_CALLBACK (gbp_build_panel_update_running_time),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  g_signal_connect_object (build_manager,
+                           "build-failed",
+                           G_CALLBACK (gbp_build_panel_update_running_time),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  IDE_EXIT;
+}
+
+static void
 gbp_build_panel_destroy (GtkWidget *widget)
 {
   GbpBuildPanel *self = (GbpBuildPanel *)widget;
 
-  if (self->result)
+  if (self->pipeline != NULL)
     gbp_build_panel_disconnect (self);
 
-  g_clear_object (&self->bindings);
-  g_clear_object (&self->signals);
   g_clear_pointer (&self->diags_hash, g_hash_table_unref);
 
   GTK_WIDGET_CLASS (gbp_build_panel_parent_class)->destroy (widget);
@@ -391,16 +424,16 @@ gbp_build_panel_get_property (GObject    *object,
                               GValue     *value,
                               GParamSpec *pspec)
 {
-  GbpBuildPanel *self = GBP_BUILD_PANEL(object);
+  GbpBuildPanel *self = GBP_BUILD_PANEL (object);
 
   switch (prop_id)
     {
-    case PROP_RESULT:
-      g_value_set_object (value, self->result);
+    case PROP_PIPELINE:
+      g_value_set_object (value, self->pipeline);
       break;
 
     default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
 }
 
@@ -410,16 +443,16 @@ gbp_build_panel_set_property (GObject      *object,
                               const GValue *value,
                               GParamSpec   *pspec)
 {
-  GbpBuildPanel *self = GBP_BUILD_PANEL(object);
+  GbpBuildPanel *self = GBP_BUILD_PANEL (object);
 
   switch (prop_id)
     {
-    case PROP_RESULT:
-      gbp_build_panel_set_result (self, g_value_get_object (value));
+    case PROP_PIPELINE:
+      gbp_build_panel_set_pipeline (self, g_value_get_object (value));
       break;
 
     default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
 }
 
@@ -429,19 +462,19 @@ gbp_build_panel_class_init (GbpBuildPanelClass *klass)
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
+  widget_class->destroy = gbp_build_panel_destroy;
+
   object_class->get_property = gbp_build_panel_get_property;
   object_class->set_property = gbp_build_panel_set_property;
 
-  widget_class->destroy = gbp_build_panel_destroy;
-
-  properties [PROP_RESULT] =
-    g_param_spec_object ("result",
-                         "Result",
-                         "Result",
-                         IDE_TYPE_BUILD_RESULT,
-                         (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+  properties [PROP_PIPELINE] =
+    g_param_spec_object ("pipeline",
+                         NULL,
+                         NULL,
+                         IDE_TYPE_BUILD_PIPELINE,
+                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
 
-  g_object_class_install_properties (object_class, LAST_PROP, properties);
+  g_object_class_install_properties (object_class, N_PROPS, properties);
 
   gtk_widget_class_set_template_from_resource (widget_class, 
"/org/gnome/builder/plugins/build-tools-plugin/gbp-build-panel.ui");
   gtk_widget_class_set_css_name (widget_class, "buildpanel");
@@ -468,25 +501,7 @@ gbp_build_panel_init (GbpBuildPanel *self)
 
   g_object_set (self, "title", _("Build"), NULL);
 
-  self->signals = egg_signal_group_new (IDE_TYPE_BUILD_RESULT);
-
-  egg_signal_group_connect_object (self->signals,
-                                   "diagnostic",
-                                   G_CALLBACK (gbp_build_panel_diagnostic),
-                                   self,
-                                   G_CONNECT_SWAPPED);
-
-  egg_signal_group_connect_object (self->signals,
-                                   "notify::running",
-                                   G_CALLBACK (gbp_build_panel_notify_running),
-                                   self,
-                                   G_CONNECT_SWAPPED);
-
-  egg_signal_group_connect_object (self->signals,
-                                   "notify::running-time",
-                                   G_CALLBACK (gbp_build_panel_notify_running_time),
-                                   self,
-                                   G_CONNECT_SWAPPED);
+  ide_widget_set_context_handler (self, gbp_build_panel_context_handler);
 
   g_signal_connect_object (self->diagnostics_tree_view,
                            "row-activated",
@@ -498,10 +513,4 @@ gbp_build_panel_init (GbpBuildPanel *self)
                                       GTK_CELL_RENDERER (self->diagnostics_text),
                                       gbp_build_panel_text_func,
                                       self, NULL);
-
-
-  self->bindings = egg_binding_group_new ();
-
-  egg_binding_group_bind (self->bindings, "mode", self->status_label, "label",
-                          G_BINDING_SYNC_CREATE);
 }
diff --git a/plugins/build-tools/gbp-build-panel.h b/plugins/build-tools/gbp-build-panel.h
index 489b49c..a3e61ca 100644
--- a/plugins/build-tools/gbp-build-panel.h
+++ b/plugins/build-tools/gbp-build-panel.h
@@ -28,9 +28,6 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (GbpBuildPanel, gbp_build_panel, GBP, BUILD_PANEL, PnlDockWidget)
 
-void gbp_build_panel_set_result (GbpBuildPanel  *self,
-                                 IdeBuildResult *result);
-
 G_END_DECLS
 
 #endif /* GBP_BUILD_PANEL_H */
diff --git a/plugins/build-tools/gbp-build-tool.c b/plugins/build-tools/gbp-build-tool.c
index d63d396..231cf36 100644
--- a/plugins/build-tools/gbp-build-tool.c
+++ b/plugins/build-tools/gbp-build-tool.c
@@ -21,6 +21,7 @@
 #endif
 
 #include <glib/gi18n.h>
+#include <ide.h>
 
 #include "gbp-build-tool.h"
 
@@ -30,17 +31,15 @@ struct _GbpBuildTool
   gint64  build_start;
 };
 
-static gint                  parallel = -1;
-static IdeBuilderBuildFlags  flags;
-static gchar                *configuration_id;
-static gchar                *device_id;
-static gchar                *runtime_id;
+static gint   parallel = -1;
+static gchar *configuration_id;
+static gchar *device_id;
+static gchar *runtime_id;
 
 static void application_tool_init (IdeApplicationToolInterface *iface);
 
 G_DEFINE_TYPE_EXTENDED (GbpBuildTool, gbp_build_tool, G_TYPE_OBJECT, 0,
-                        G_IMPLEMENT_INTERFACE (IDE_TYPE_APPLICATION_TOOL,
-                                               application_tool_init))
+                        G_IMPLEMENT_INTERFACE (IDE_TYPE_APPLICATION_TOOL, application_tool_init))
 
 static void
 gbp_build_tool_class_init (GbpBuildToolClass *klass)
@@ -53,19 +52,19 @@ gbp_build_tool_init (GbpBuildTool *self)
 }
 
 static void
-gbp_build_tool_log (GbpBuildTool      *self,
-                    IdeBuildResultLog  log,
-                    const gchar       *message,
-                    IdeBuildResult    *build_result)
+gbp_build_tool_log_observer (IdeBuildLogStream  stream,
+                             const gchar       *message,
+                             gssize             message_len,
+                             gpointer           user_data)
 {
-  if (log == IDE_BUILD_RESULT_LOG_STDERR)
+  if (stream == IDE_BUILD_LOG_STDERR)
     g_printerr ("%s", message);
   else
     g_print ("%s", message);
 }
 
 static void
-print_build_info (IdeContext *context,
+print_build_info (IdeContext       *context,
                   IdeConfiguration *configuration)
 {
   IdeProject *project;
@@ -116,35 +115,35 @@ print_build_info (IdeContext *context,
 }
 
 static void
-gbp_build_tool_build_cb (GObject      *object,
-                         GAsyncResult *result,
-                         gpointer      user_data)
+gbp_build_tool_execute_cb (GObject      *object,
+                           GAsyncResult *result,
+                           gpointer      user_data)
 {
+  IdeBuildManager *build_manager = (IdeBuildManager *)object;
   g_autoptr(GTask) task = user_data;
-  g_autoptr(IdeBuildResult) build_result = NULL;
+  g_autoptr(GError) error = NULL;
   GbpBuildTool *self;
-  IdeBuilder *builder = (IdeBuilder *)object;
-  GError *error = NULL;
   guint64 completed_at;
   guint64 total_usec;
 
   g_assert (G_IS_TASK (task));
-  g_assert (IDE_IS_BUILDER (builder));
+  g_assert (IDE_IS_BUILD_MANAGER (build_manager));
 
   self = g_task_get_source_object (task);
   completed_at = g_get_monotonic_time ();
-  build_result = ide_builder_build_finish (builder, result, &error);
+
+  ide_build_manager_execute_finish (build_manager, result, &error);
 
   total_usec = completed_at - self->build_start;
 
-  if (build_result == NULL)
+  if (error != NULL)
     {
       g_printerr (_("===============\n"));
       g_printerr (_(" Build Failure: %s\n"), error->message);
       g_printerr (_(" Build ran for: %"G_GUINT64_FORMAT".%"G_GUINT64_FORMAT" seconds\n"),
                   (total_usec / 1000000), ((total_usec % 1000000) / 1000));
       g_printerr (_("===============\n"));
-      g_task_return_error (task, error);
+      g_task_return_error (task, g_steal_pointer (&error));
       return;
     }
 
@@ -170,17 +169,16 @@ gbp_build_tool_new_context_cb (GObject      *object,
 {
   g_autoptr(GTask) task = user_data;
   g_autoptr(IdeContext) context = NULL;
-  g_autoptr(IdeBuilder) builder = NULL;
-  g_autoptr(IdeBuildResult) build_result = NULL;
   g_autoptr(IdeConfiguration) configuration = NULL;
   IdeConfigurationManager *configuration_manager;
-  IdeBuildSystem *build_system;
-  GbpBuildTool *self;
+  IdeBuildManager *build_manager;
+  IdeBuildPipeline *pipeline;
+  GCancellable *cancellable;
   GError *error = NULL;
 
   g_assert (G_IS_TASK (task));
 
-  self = g_task_get_source_object (task);
+  cancellable = g_task_get_cancellable (task);
 
   context = ide_context_new_finish (result, &error);
 
@@ -233,37 +231,18 @@ gbp_build_tool_new_context_cb (GObject      *object,
 
   print_build_info (context, configuration);
 
-  build_system = ide_context_get_build_system (context);
-  builder = ide_build_system_get_builder (build_system, configuration, &error);
+  build_manager = ide_context_get_build_manager (context);
 
-  if (builder == NULL)
-    {
-      g_task_return_error (task, error);
-      return;
-    }
-
-  self->build_start = g_get_monotonic_time ();
+  pipeline = ide_build_manager_get_pipeline (build_manager);
+  ide_build_pipeline_add_log_observer (pipeline,
+                                       gbp_build_tool_log_observer,
+                                       NULL, NULL);
 
-  ide_builder_build_async (builder,
-                           flags,
-                           &build_result,
-                           g_task_get_cancellable (task),
-                           gbp_build_tool_build_cb,
-                           g_object_ref (task));
-
-  if (build_result != NULL)
-    {
-      /*
-       * XXX: Technically we could lose some log lines unless we
-       * guarantee that the build can't start until the main loop
-       * is reached. (Which is probably reasonable).
-       */
-      g_signal_connect_object (build_result,
-                               "log",
-                               G_CALLBACK (gbp_build_tool_log),
-                               g_task_get_source_object (task),
-                               G_CONNECT_SWAPPED);
-    }
+  ide_build_manager_execute_async (build_manager,
+                                   IDE_BUILD_PHASE_BUILD,
+                                   cancellable,
+                                   gbp_build_tool_execute_cb,
+                                   g_steal_pointer (&task));
 }
 
 static void
@@ -328,14 +307,13 @@ gbp_build_tool_run_async (IdeApplicationTool  *tool,
 
   if (clean)
     {
-      flags |= IDE_BUILDER_BUILD_FLAGS_FORCE_CLEAN;
-      flags |= IDE_BUILDER_BUILD_FLAGS_NO_BUILD;
+      /* TODO */
     }
 
   ide_context_new_async (project_file,
                          cancellable,
                          gbp_build_tool_new_context_cb,
-                         g_object_ref (task));
+                         g_steal_pointer (&task));
 }
 
 static gboolean
diff --git a/plugins/build-tools/gbp-build-workbench-addin.c b/plugins/build-tools/gbp-build-workbench-addin.c
index 80fbe4b..e79bf0e 100644
--- a/plugins/build-tools/gbp-build-workbench-addin.c
+++ b/plugins/build-tools/gbp-build-workbench-addin.c
@@ -36,7 +36,7 @@ struct _GbpBuildWorkbenchAddin
   GbpBuildPerspective *build_perspective;
 
   /* Owned */
-  IdeBuildResult      *result;
+  IdeBuildPipeline    *pipeline;
   GSimpleActionGroup  *actions;
 };
 
@@ -47,25 +47,25 @@ G_DEFINE_TYPE_EXTENDED (GbpBuildWorkbenchAddin, gbp_build_workbench_addin, G_TYP
 
 enum {
   PROP_0,
-  PROP_RESULT,
+  PROP_PIPELINE,
   LAST_PROP
 };
 
 static GParamSpec *properties [LAST_PROP];
 
 static void
-gbp_build_workbench_addin_set_result (GbpBuildWorkbenchAddin *self,
-                                      IdeBuildResult         *result)
+gbp_build_workbench_addin_set_pipeline (GbpBuildWorkbenchAddin *self,
+                                        IdeBuildPipeline       *pipeline)
 {
   g_return_if_fail (GBP_IS_BUILD_WORKBENCH_ADDIN (self));
-  g_return_if_fail (!result || IDE_IS_BUILD_RESULT (result));
+  g_return_if_fail (!pipeline || IDE_IS_BUILD_PIPELINE (pipeline));
   g_return_if_fail (self->workbench != NULL);
 
-  if (g_set_object (&self->result, result))
+  if (g_set_object (&self->pipeline, pipeline))
     {
-      gbp_build_log_panel_set_result (self->build_log_panel, result);
+      gbp_build_log_panel_set_pipeline (self->build_log_panel, pipeline);
       gtk_widget_show (GTK_WIDGET (self->build_log_panel));
-      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_RESULT]);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_PIPELINE]);
     }
 }
 
@@ -137,7 +137,7 @@ gbp_build_workbench_addin_load (IdeWorkbenchAddin *addin,
 
   g_signal_connect_object (build_manager,
                            "build-started",
-                           G_CALLBACK (gbp_build_workbench_addin_set_result),
+                           G_CALLBACK (gbp_build_workbench_addin_set_pipeline),
                            self,
                            G_CONNECT_SWAPPED);
 
@@ -158,7 +158,7 @@ gbp_build_workbench_addin_load (IdeWorkbenchAddin *addin,
   gtk_widget_insert_action_group (GTK_WIDGET (workbench), "build-tools",
                                   G_ACTION_GROUP (self->actions));
 
-  g_object_bind_property (self, "result", self->panel, "result", 0);
+  g_object_bind_property (self, "pipeline", self->panel, "pipeline", 0);
 
   self->build_perspective = g_object_new (GBP_TYPE_BUILD_PERSPECTIVE,
                                           "configuration-manager", configuration_manager,
@@ -194,8 +194,8 @@ gbp_build_workbench_addin_get_property (GObject    *object,
 
   switch (prop_id)
     {
-    case PROP_RESULT:
-      g_value_set_object (value, self->result);
+    case PROP_PIPELINE:
+      g_value_set_object (value, self->pipeline);
       break;
 
     default:
@@ -209,7 +209,7 @@ gbp_build_workbench_addin_finalize (GObject *object)
   GbpBuildWorkbenchAddin *self = (GbpBuildWorkbenchAddin *)object;
 
   g_clear_object (&self->actions);
-  g_clear_object (&self->result);
+  g_clear_object (&self->pipeline);
 
   G_OBJECT_CLASS (gbp_build_workbench_addin_parent_class)->finalize (object);
 }
@@ -222,11 +222,11 @@ gbp_build_workbench_addin_class_init (GbpBuildWorkbenchAddinClass *klass)
   object_class->finalize = gbp_build_workbench_addin_finalize;
   object_class->get_property = gbp_build_workbench_addin_get_property;
 
-  properties [PROP_RESULT] =
-    g_param_spec_object ("result",
-                         "Result",
-                         "The current build result",
-                         IDE_TYPE_BUILD_RESULT,
+  properties [PROP_PIPELINE] =
+    g_param_spec_object ("pipeline",
+                         "Pipeline",
+                         "The current build pipeline",
+                         IDE_TYPE_BUILD_PIPELINE,
                          (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 
   g_object_class_install_properties (object_class, LAST_PROP, properties);
diff --git a/plugins/flatpak/Makefile.am b/plugins/flatpak/Makefile.am
index a5324bd..fc683bd 100644
--- a/plugins/flatpak/Makefile.am
+++ b/plugins/flatpak/Makefile.am
@@ -10,23 +10,29 @@ plugin_LTLIBRARIES = libflatpak-plugin.la
 dist_plugin_DATA = flatpak.plugin
 
 libflatpak_plugin_la_SOURCES = \
-       gbp-flatpak-runtime-provider.c \
-       gbp-flatpak-runtime-provider.h \
-       gbp-flatpak-runtime.c \
-       gbp-flatpak-runtime.h \
-       gbp-flatpak-subprocess-launcher.c \
-       gbp-flatpak-subprocess-launcher.h \
-       gbp-flatpak-plugin.c \
-       gbp-flatpak-runner.c \
-       gbp-flatpak-runner.h \
        gbp-flatpak-application-addin.c \
        gbp-flatpak-application-addin.h \
        gbp-flatpak-clone-widget.c \
        gbp-flatpak-clone-widget.h \
        gbp-flatpak-genesis-addin.c \
        gbp-flatpak-genesis-addin.h \
+       gbp-flatpak-pipeline-addin.c \
+       gbp-flatpak-pipeline-addin.h \
+       gbp-flatpak-plugin.c \
+       gbp-flatpak-runner.c \
+       gbp-flatpak-runner.h \
+       gbp-flatpak-runtime-provider.c \
+       gbp-flatpak-runtime-provider.h \
+       gbp-flatpak-runtime.c \
+       gbp-flatpak-runtime.h \
        gbp-flatpak-sources.c \
        gbp-flatpak-sources.h \
+       gbp-flatpak-subprocess-launcher.c \
+       gbp-flatpak-subprocess-launcher.h \
+       gbp-flatpak-transfer.c \
+       gbp-flatpak-transfer.h \
+       gbp-flatpak-util.c \
+       gbp-flatpak-util.h \
        $(NULL)
 
 nodist_libflatpak_plugin_la_SOURCES = \
diff --git a/plugins/flatpak/gbp-flatpak-pipeline-addin.c b/plugins/flatpak/gbp-flatpak-pipeline-addin.c
new file mode 100644
index 0000000..9bc4255
--- /dev/null
+++ b/plugins/flatpak/gbp-flatpak-pipeline-addin.c
@@ -0,0 +1,485 @@
+/* gbp-flatpak-pipeline-addin.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "gbp-flatpak-pipeline-addin"
+
+#include "gbp-flatpak-pipeline-addin.h"
+#include "gbp-flatpak-runtime.h"
+#include "gbp-flatpak-transfer.h"
+#include "gbp-flatpak-util.h"
+
+enum {
+  PREPARE_MKDIRS,
+  PREPARE_REMOTES,
+  PREPARE_BUILD_INIT,
+};
+
+static IdeSubprocessLauncher *
+create_subprocess_launcher (void)
+{
+  IdeSubprocessLauncher *launcher;
+
+  launcher = ide_subprocess_launcher_new (0);
+  ide_subprocess_launcher_set_run_on_host (launcher, TRUE);
+  ide_subprocess_launcher_set_clear_env (launcher, FALSE);
+
+  return launcher;
+}
+
+static gboolean
+register_mkdirs_stage (GbpFlatpakPipelineAddin  *self,
+                       IdeBuildPipeline         *pipeline,
+                       IdeContext               *context,
+                       GError                  **error)
+{
+  g_autoptr(IdeBuildStage) mkdirs = NULL;
+  IdeConfiguration *config;
+  g_autofree gchar *repo_dir = NULL;
+  g_autofree gchar *staging_dir = NULL;
+  guint stage_id;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (IDE_IS_CONTEXT (context));
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+
+  mkdirs = ide_build_stage_mkdirs_new (context);
+
+  repo_dir = gbp_flatpak_get_repo_dir (config);
+  staging_dir = gbp_flatpak_get_staging_dir (config);
+
+  ide_build_stage_mkdirs_add_path (IDE_BUILD_STAGE_MKDIRS (mkdirs), repo_dir, TRUE, 0750);
+  ide_build_stage_mkdirs_add_path (IDE_BUILD_STAGE_MKDIRS (mkdirs), staging_dir, TRUE, 0750);
+
+  stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_PREPARE, PREPARE_MKDIRS, mkdirs);
+
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static gboolean
+register_remotes_stage (GbpFlatpakPipelineAddin  *self,
+                        IdeBuildPipeline         *pipeline,
+                        IdeContext               *context,
+                        GError                  **error)
+{
+  g_autoptr(IdeBuildStage) stage = NULL;
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  IdeConfiguration *config;
+  const gchar *branch;
+  const gchar *platform;
+  const gchar *sdk;
+  const gchar *repo_name = NULL;
+  const gchar *repo_path = NULL;
+  guint stage_id;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (IDE_IS_CONTEXT (context));
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+
+  platform = ide_configuration_get_internal_string (config, "flatpak-platform");
+  sdk = ide_configuration_get_internal_string (config, "flatpak-sdk");
+  branch = ide_configuration_get_internal_string (config, "flatpak-branch");
+
+  if (ide_str_equal0 (platform, "org.gnome.Platform") ||
+      ide_str_equal0 (platform, "org.gnome.Sdk") ||
+      ide_str_equal0 (sdk, "org.gnome.Platform") ||
+      ide_str_equal0 (sdk, "org.gnome.Sdk"))
+    {
+      if (ide_str_equal0 (branch, "master"))
+        {
+          repo_name = "gnome-nightly";
+          repo_path = "https://sdk.gnome.org/gnome-nightly.flatpakrepo";;
+        }
+      else
+        {
+          repo_name = "gnome";
+          repo_path = "https://sdk.gnome.org/gnome.flatpakrepo";;
+        }
+    }
+
+  if (repo_name == NULL || repo_path == NULL)
+    return TRUE;
+
+  launcher = create_subprocess_launcher ();
+
+  ide_subprocess_launcher_push_argv (launcher, "flatpak");
+  ide_subprocess_launcher_push_argv (launcher, "remote-add");
+  ide_subprocess_launcher_push_argv (launcher, "--user");
+  ide_subprocess_launcher_push_argv (launcher, "--if-not-exists");
+  ide_subprocess_launcher_push_argv (launcher, "--from");
+  ide_subprocess_launcher_push_argv (launcher, repo_name);
+  ide_subprocess_launcher_push_argv (launcher, repo_path);
+
+  stage = g_object_new (IDE_TYPE_BUILD_STAGE_LAUNCHER,
+                        "launcher", launcher,
+                        "context", context,
+                        NULL);
+
+  stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_PREPARE, PREPARE_REMOTES, stage);
+
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static gboolean
+register_download_stage (GbpFlatpakPipelineAddin  *self,
+                         IdeBuildPipeline         *pipeline,
+                         IdeContext               *context,
+                         GError                  **error)
+{
+  IdeConfiguration *config;
+  const gchar *items[2] = { NULL };
+  const gchar *platform;
+  const gchar *sdk;
+  const gchar *branch;
+  guint stage_id;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+  platform = ide_configuration_get_internal_string (config, "flatpak-platform");
+  sdk = ide_configuration_get_internal_string (config, "flatpak-sdk");
+  branch = ide_configuration_get_internal_string (config, "flatpak-branch");
+
+  items[0] = platform;
+  items[1] = sdk;
+
+  for (guint i = 0; i < G_N_ELEMENTS (items); i++)
+    {
+      g_autoptr(IdeBuildStage) stage = NULL;
+      g_autoptr(IdeTransfer) transfer = NULL;
+      const gchar *id = items[i];
+
+      if (id == NULL)
+        continue;
+
+      transfer = g_object_new (GBP_TYPE_FLATPAK_TRANSFER,
+                               "context", context,
+                               "id", id,
+                               "branch", branch,
+                               NULL);
+
+      stage = g_object_new (IDE_TYPE_BUILD_STAGE_TRANSFER,
+                            "context", context,
+                            "transfer", transfer,
+                            NULL);
+
+      stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_DOWNLOADS, i, stage);
+      ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+    }
+
+  return TRUE;
+}
+
+static void
+check_if_file_exists (IdeBuildStage    *stage,
+                      IdeBuildPipeline *pipeline,
+                      GCancellable     *cancellable,
+                      const gchar      *file_path)
+{
+  gboolean exists;
+
+  g_assert (IDE_IS_BUILD_STAGE (stage));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+  g_assert (file_path != NULL);
+
+  exists = g_file_test (file_path, G_FILE_TEST_IS_REGULAR);
+  ide_build_stage_set_completed (stage, exists);
+}
+
+static gboolean
+register_build_init_stage (GbpFlatpakPipelineAddin  *self,
+                           IdeBuildPipeline         *pipeline,
+                           IdeContext               *context,
+                           GError                  **error)
+{
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  g_autoptr(IdeBuildStage) stage = NULL;
+  g_autofree gchar *staging_dir = NULL;
+  g_autofree gchar *manifest_path = NULL;
+  IdeConfiguration *config;
+  const gchar *app_id;
+  const gchar *platform;
+  const gchar *sdk;
+  const gchar *branch;
+  guint stage_id;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (IDE_IS_CONTEXT (context));
+
+  launcher = create_subprocess_launcher ();
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+
+  staging_dir = gbp_flatpak_get_staging_dir (config);
+  platform = ide_configuration_get_internal_string (config, "flatpak-platform");
+  app_id = ide_configuration_get_app_id (config);
+  sdk = ide_configuration_get_internal_string (config, "flatpak-sdk");
+  branch = ide_configuration_get_internal_string (config, "flatpak-branch");
+
+  manifest_path = g_build_filename (staging_dir, "manifest", NULL);
+
+  ide_subprocess_launcher_push_argv (launcher, "flatpak");
+  ide_subprocess_launcher_push_argv (launcher, "build-init");
+  ide_subprocess_launcher_push_argv (launcher, staging_dir);
+  ide_subprocess_launcher_push_argv (launcher, app_id);
+  ide_subprocess_launcher_push_argv (launcher, sdk);
+  ide_subprocess_launcher_push_argv (launcher, platform);
+  ide_subprocess_launcher_push_argv (launcher, branch);
+
+  stage = g_object_new (IDE_TYPE_BUILD_STAGE,
+                        "context", context,
+                        "launcher", launcher,
+                        NULL);
+
+  /*
+   * We want to avoid calling build-init if it has already been called.
+   * To check if this has happened, we just look for the manifest file
+   * located in the directory that had build-init called.
+   */
+  g_signal_connect_data (stage,
+                         "query",
+                         G_CALLBACK (check_if_file_exists),
+                         g_steal_pointer (&manifest_path),
+                         (GClosureNotify)g_free,
+                         G_CONNECT_SWAPPED);
+
+  stage_id = ide_build_pipeline_connect (pipeline,
+                                         IDE_BUILD_PHASE_PREPARE,
+                                         PREPARE_BUILD_INIT,
+                                         stage);
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static gboolean
+register_dependencies_stage (GbpFlatpakPipelineAddin  *self,
+                             IdeBuildPipeline         *pipeline,
+                             IdeContext               *context,
+                             GError                  **error)
+{
+  g_autoptr(IdeBuildStage) stage = NULL;
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  g_autofree gchar *staging_dir = NULL;
+  g_autofree gchar *stop_at_option = NULL;
+  IdeConfiguration *config;
+  const gchar *manifest_path;
+  const gchar *primary_module;
+  guint stage_id;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (IDE_IS_CONTEXT (context));
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+
+  primary_module = ide_configuration_get_internal_string (config, "flatpak-module");
+  manifest_path = ide_configuration_get_internal_string (config, "flatpak-manifest");
+
+  /* If there is no manifest, then there are no dependencies
+   * to build for this configuration.
+   */
+  if (manifest_path == NULL)
+    return TRUE;
+
+  staging_dir = gbp_flatpak_get_staging_dir (config);
+
+  launcher = create_subprocess_launcher ();
+
+  ide_subprocess_launcher_push_argv (launcher, "flatpak-builder");
+  ide_subprocess_launcher_push_argv (launcher, "--ccache");
+  ide_subprocess_launcher_push_argv (launcher, "--force-clean");
+  stop_at_option = g_strdup_printf ("--stop-at=%s", primary_module);
+  ide_subprocess_launcher_push_argv (launcher, stop_at_option);
+  ide_subprocess_launcher_push_argv (launcher, staging_dir);
+  ide_subprocess_launcher_push_argv (launcher, manifest_path);
+
+  stage = g_object_new (IDE_TYPE_BUILD_STAGE,
+                        "context", context,
+                        "launcher", launcher,
+                        NULL);
+
+  stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_DEPENDENCIES, 0, stage);
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static gboolean
+register_build_finish_stage (GbpFlatpakPipelineAddin  *self,
+                             IdeBuildPipeline         *pipeline,
+                             IdeContext               *context,
+                             GError                  **error)
+{
+  const gchar * const *finish_args;
+  g_autoptr(IdeBuildStage) stage = NULL;
+  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
+  g_autofree gchar *staging_dir = NULL;
+  g_autofree gchar *export_path = NULL;
+  IdeConfiguration *config;
+  const gchar *manifest_path;
+  const gchar *command;
+  guint stage_id;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+  g_assert (IDE_IS_CONTEXT (context));
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+
+  manifest_path = ide_configuration_get_internal_string (config, "flatpak-manifest");
+  command = ide_configuration_get_internal_string (config, "flatpak-command");
+  finish_args = ide_configuration_get_internal_strv (config, "flatpak-finish-args");
+
+  /* If there is no manifest, then there are no dependencies
+   * to build for this configuration.
+   */
+  if (manifest_path == NULL)
+    return TRUE;
+
+  staging_dir = gbp_flatpak_get_staging_dir (config);
+
+  launcher = create_subprocess_launcher ();
+
+  ide_subprocess_launcher_push_argv (launcher, "flatpak");
+  ide_subprocess_launcher_push_argv (launcher, "build-finish");
+
+  /*
+   * The --command argument allows the manifest to specify which binary in the
+   * path (/app/bin) should be used as the application binary. By default, the
+   * first binary found in /app/bin is used. However, for applications that
+   * contain supplimental binaries, they may need to specify which is primary.
+   */
+  if (!ide_str_empty0 (command))
+    {
+      g_autofree gchar *command_option = NULL;
+
+      command_option = g_strdup_printf ("--command=%s", command);
+      ide_subprocess_launcher_push_argv (launcher, command_option);
+    }
+
+  /*
+   * The finish args include things like --share=network. These specify which
+   * sandboxing features are necessary, what host files may need to be mapped
+   * in, which D-Bus services to allow, and more.
+   */
+  ide_subprocess_launcher_push_args (launcher, finish_args);
+
+  /*
+   * The staging directory is the location we did build-init with (or which
+   * the flatpak-builder was using for building).
+   */
+  ide_subprocess_launcher_push_argv (launcher, staging_dir);
+
+  stage = g_object_new (IDE_TYPE_BUILD_STAGE,
+                        "context", context,
+                        "launcher", launcher,
+                        NULL);
+
+  /*
+   * If the export directory is found, we already performed the build-finish
+   * and we do not need to run this operation again. So check if the file
+   * exists and update IdeBuildStage:completed.
+   */
+  export_path = g_build_filename (staging_dir, "export", NULL);
+  g_signal_connect_data (stage,
+                         "query",
+                         G_CALLBACK (check_if_file_exists),
+                         g_steal_pointer (&export_path),
+                         (GClosureNotify)g_free,
+                         G_CONNECT_SWAPPED);
+
+  stage_id = ide_build_pipeline_connect (pipeline, IDE_BUILD_PHASE_EXPORT, 0, stage);
+  ide_build_pipeline_addin_track (IDE_BUILD_PIPELINE_ADDIN (self), stage_id);
+
+  return TRUE;
+}
+
+static void
+gbp_flatpak_pipeline_addin_load (IdeBuildPipelineAddin *addin,
+                                 IdeBuildPipeline      *pipeline)
+{
+  GbpFlatpakPipelineAddin *self = (GbpFlatpakPipelineAddin *)addin;
+  g_autoptr(GError) error = NULL;
+  IdeConfiguration *config;
+  IdeContext *context;
+  IdeRuntime *runtime;
+
+  g_assert (GBP_IS_FLATPAK_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  config = ide_build_pipeline_get_configuration (pipeline);
+
+  /* TODO: Once we have GbpFlatpakConfiguration, we can check for
+   *       that (and it should only allow for valid flatpak runtimes).
+   */
+
+  runtime = ide_configuration_get_runtime (config);
+
+  if (!GBP_IS_FLATPAK_RUNTIME (runtime))
+    return;
+
+  /*
+   * TODO: We should add the ability to mark a pipeline as broken, if we
+   *       detect something that is alarming. That will prevent builds from
+   *       occuring altogether and allow us to present issues within the UI.
+   */
+
+  context = ide_object_get_context (IDE_OBJECT (self));
+
+  if (!register_mkdirs_stage (self, pipeline, context, &error) ||
+      !register_remotes_stage (self, pipeline, context, &error) ||
+      !register_build_init_stage (self, pipeline, context, &error) ||
+      !register_download_stage (self, pipeline, context, &error) ||
+      !register_dependencies_stage (self, pipeline, context, &error) ||
+      !register_build_finish_stage (self, pipeline, context, &error))
+    g_warning ("%s", error->message);
+}
+
+/* GObject boilerplate */
+
+static void
+build_pipeline_addin_iface_init (IdeBuildPipelineAddinInterface *iface)
+{
+  iface->load = gbp_flatpak_pipeline_addin_load;
+}
+
+struct _GbpFlatpakPipelineAddin { IdeObject parent_instance; };
+
+G_DEFINE_TYPE_WITH_CODE (GbpFlatpakPipelineAddin, gbp_flatpak_pipeline_addin, IDE_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (IDE_TYPE_BUILD_PIPELINE_ADDIN,
+                                                build_pipeline_addin_iface_init))
+
+static void
+gbp_flatpak_pipeline_addin_class_init (GbpFlatpakPipelineAddinClass *klass)
+{
+}
+
+static void
+gbp_flatpak_pipeline_addin_init (GbpFlatpakPipelineAddin *self)
+{
+}
diff --git a/plugins/gcc/gbp-gcc-build-result-addin.h b/plugins/flatpak/gbp-flatpak-pipeline-addin.h
similarity index 64%
copy from plugins/gcc/gbp-gcc-build-result-addin.h
copy to plugins/flatpak/gbp-flatpak-pipeline-addin.h
index 2a77a0b..c6abf38 100644
--- a/plugins/gcc/gbp-gcc-build-result-addin.h
+++ b/plugins/flatpak/gbp-flatpak-pipeline-addin.h
@@ -1,6 +1,6 @@
-/* gbp-gcc-build-result-addin.h
+/* gbp-flatpak-pipeline-addin.h
  *
- * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,17 +16,17 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef GBP_GCC_BUILD_RESULT_ADDIN_H
-#define GBP_GCC_BUILD_RESULT_ADDIN_H
+#ifndef GBP_FLATPAK_PIPELINE_ADDIN_H
+#define GBP_FLATPAK_PIPELINE_ADDIN_H
 
 #include <ide.h>
 
 G_BEGIN_DECLS
 
-#define GBP_TYPE_GCC_BUILD_RESULT_ADDIN (gbp_gcc_build_result_addin_get_type())
+#define GBP_TYPE_FLATPAK_PIPELINE_ADDIN (gbp_flatpak_pipeline_addin_get_type())
 
-G_DECLARE_FINAL_TYPE (GbpGccBuildResultAddin, gbp_gcc_build_result_addin, GBP, GCC_BUILD_RESULT_ADDIN, 
IdeObject)
+G_DECLARE_FINAL_TYPE (GbpFlatpakPipelineAddin, gbp_flatpak_pipeline_addin, GBP, FLATPAK_PIPELINE_ADDIN, 
IdeObject)
 
 G_END_DECLS
 
-#endif /* GBP_GCC_BUILD_RESULT_ADDIN_H */
+#endif /* GBP_FLATPAK_PIPELINE_ADDIN_H */
diff --git a/plugins/flatpak/gbp-flatpak-runtime.c b/plugins/flatpak/gbp-flatpak-runtime.c
index c65e1d6..c0dab4c 100644
--- a/plugins/flatpak/gbp-flatpak-runtime.c
+++ b/plugins/flatpak/gbp-flatpak-runtime.c
@@ -97,676 +97,6 @@ gbp_flatpak_runtime_contains_program_in_path (IdeRuntime   *runtime,
   return (subprocess != NULL) && ide_subprocess_wait_check (subprocess, cancellable, NULL);
 }
 
-/**
- * manifest_has_multiple_modules:
- *
- * Searches a #JsonObject to see if it has more than one
- * element in a "modules" list.
- */
-static gboolean
-manifest_has_multiple_modules (JsonObject *object)
-{
-  JsonArray *modules;
-  guint num_modules;
-
-  modules = json_object_get_array_member (object, "modules");
-  if (modules == NULL)
-    return FALSE;
-
-  num_modules = json_array_get_length (modules);
-  if (num_modules > 1)
-      return TRUE;
-  else if (num_modules == 0)
-      return FALSE;
-  else
-    {
-      JsonNode *module;
-      module = json_array_get_element (modules, 0);
-      if (JSON_NODE_HOLDS_OBJECT (module))
-        {
-          object = json_node_get_object (module);
-          if (json_object_has_member (object, "modules"))
-            {
-              modules = json_object_get_array_member (object, "modules");
-              if (modules == NULL)
-                return FALSE;
-              return (json_array_get_length (modules) > 0);
-            }
-        }
-      return FALSE;
-    }
-}
-
-static void
-gbp_flatpak_runtime_prebuild_worker (GTask        *task,
-                                     gpointer      source_object,
-                                     gpointer      task_data,
-                                     GCancellable *cancellable)
-{
-  GbpFlatpakRuntime *self = source_object;
-  IdeBuildResult *build_result = (IdeBuildResult *)task_data;
-  IdeContext *context;
-  IdeConfigurationManager *config_manager;
-  IdeConfiguration *configuration;
-  IdeRuntimeManager *runtime_manager;
-  const gchar *flatpak_repo_name = NULL;
-  gboolean already_ran_build_init = FALSE;
-  g_autofree gchar *build_path = NULL;
-  g_autofree gchar *flatpak_repo_path = NULL;
-  g_autofree gchar *metadata_path = NULL;
-  g_autoptr(GFile) build_dir = NULL;
-  g_autoptr(GFile) flatpak_repo_dir = NULL;
-  g_autoptr(GFile) metadata_file = NULL;
-  g_autoptr(IdeSubprocessLauncher) launcher = NULL;
-  g_autoptr(IdeSubprocess) process = NULL;
-  g_autoptr(GError) error = NULL;
-
-  g_assert (G_IS_TASK (task));
-  g_assert (GBP_IS_FLATPAK_RUNTIME (self));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-
-  build_path = get_build_directory (self);
-  build_dir = g_file_new_for_path (build_path);
-
-  if (!g_file_query_exists (build_dir, cancellable))
-    {
-      if (!g_file_make_directory_with_parents (build_dir, cancellable, &error))
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-    }
-
-  context = ide_object_get_context (IDE_OBJECT (self));
-  config_manager = ide_context_get_configuration_manager (context);
-  configuration = ide_configuration_manager_get_current (config_manager);
-  runtime_manager = ide_context_get_runtime_manager (context);
-
-  g_assert (IDE_IS_CONFIGURATION (configuration));
-  g_assert (IDE_IS_RUNTIME_MANAGER (runtime_manager));
-
-  /* Make sure there's a local flatpak repo we can use to export the build */
-  flatpak_repo_path = g_build_filename (g_get_user_cache_dir (),
-                                        "gnome-builder",
-                                        "flatpak-repo",
-                                        NULL);
-  flatpak_repo_dir = g_file_new_for_path (flatpak_repo_path);
-  if (!g_file_query_exists (flatpak_repo_dir, cancellable))
-    {
-      if (!g_file_make_directory_with_parents (flatpak_repo_dir, cancellable, &error))
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-    }
-
-  launcher = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME (self), 
&error);
-  if (launcher == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_subprocess_launcher_push_argv (launcher, "flatpak");
-  ide_subprocess_launcher_push_argv (launcher, "remote-add");
-  ide_subprocess_launcher_push_argv (launcher, "--user");
-  ide_subprocess_launcher_push_argv (launcher, "--no-gpg-verify");
-  ide_subprocess_launcher_push_argv (launcher, "--if-not-exists");
-  flatpak_repo_name = ide_configuration_get_internal_string (configuration, "flatpak-repo-name");
-  g_assert (!ide_str_empty0 (flatpak_repo_name));
-  ide_subprocess_launcher_push_argv (launcher, flatpak_repo_name);
-  ide_subprocess_launcher_push_argv (launcher, flatpak_repo_path);
-  process = ide_subprocess_launcher_spawn (launcher, cancellable, &error);
-
-  if (process == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_build_result_log_subprocess (build_result, process);
-  if (!ide_subprocess_wait_check (process, cancellable, &error))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-
-  ide_configuration_set_internal_object (configuration, "flatpak-repo-dir", flatpak_repo_dir);
-
-  /* Check if flatpak build-init has been run by checking for the metadata file */
-  metadata_path = g_build_filename (build_path, "metadata", NULL);
-  metadata_file = g_file_new_for_path (metadata_path);
-  g_assert (metadata_file != NULL);
-  if (g_file_query_exists (metadata_file, cancellable))
-    already_ran_build_init = TRUE;
-
-  /*
-   * Install the runtime and sdk if they're just the standard gnome ones,
-   * and run flatpak-builder if necessary.
-   */
-  if (self->manifest != NULL)
-    {
-      gchar *manifest_path;
-      g_autoptr(JsonParser) parser = NULL;
-      JsonNode *root_node = NULL;
-      JsonObject *root_object = NULL;
-      gboolean has_multiple_modules;
-
-      manifest_path = g_file_get_path (self->manifest);
-      g_assert (!ide_str_empty0 (manifest_path));
-
-      parser = json_parser_new ();
-      if (!json_parser_load_from_file (parser, manifest_path, &error))
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-      root_node = json_parser_get_root (parser);
-      g_assert (JSON_NODE_HOLDS_OBJECT (root_node));
-      root_object = json_node_get_object (root_node);
-      has_multiple_modules = manifest_has_multiple_modules (root_object);
-
-      if (g_strcmp0 (self->platform, "org.gnome.Platform") == 0 ||
-          g_strcmp0 (self->sdk, "org.gnome.Sdk") == 0)
-        {
-          gchar *gnome_repo_name = NULL;
-          gchar *gnome_repo_path = NULL;
-          const gchar *arch = NULL;
-          g_autofree gchar *runtime_id = NULL;
-          g_autofree gchar *sdk_id = NULL;
-          IdeRuntime *runtime;
-          IdeRuntime *sdk;
-
-          arch = flatpak_get_default_arch ();
-
-          runtime_id = g_strdup_printf ("flatpak:%s/%s/%s", self->platform, self->branch, arch);
-          sdk_id = g_strdup_printf ("flatpak:%s/%s/%s", self->sdk, self->branch, arch);
-          runtime = ide_runtime_manager_get_runtime (runtime_manager, runtime_id);
-          sdk = ide_runtime_manager_get_runtime (runtime_manager, sdk_id);
-
-          /* Add the gnome or gnome-nightly remote */
-          if (runtime == NULL || sdk == NULL)
-            {
-              g_autoptr(IdeSubprocessLauncher) launcher2 = NULL;
-              g_autoptr(IdeSubprocess) process2 = NULL;
-
-              if (g_strcmp0 (self->branch, "master") == 0)
-                {
-                  gnome_repo_name = "gnome-nightly";
-                  gnome_repo_path = "https://sdk.gnome.org/gnome-nightly.flatpakrepo";;
-                }
-              else
-                {
-                  gnome_repo_name = "gnome";
-                  gnome_repo_path = "https://sdk.gnome.org/gnome.flatpakrepo";;
-                }
-
-              launcher2 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME 
(self), &error);
-              if (launcher2 == NULL)
-                {
-                  g_task_return_error (task, g_steal_pointer (&error));
-                  return;
-                }
-              ide_subprocess_launcher_push_argv (launcher2, "flatpak");
-              ide_subprocess_launcher_push_argv (launcher2, "remote-add");
-              ide_subprocess_launcher_push_argv (launcher2, "--user");
-              ide_subprocess_launcher_push_argv (launcher2, "--if-not-exists");
-              ide_subprocess_launcher_push_argv (launcher2, "--from");
-              ide_subprocess_launcher_push_argv (launcher2, gnome_repo_name);
-              ide_subprocess_launcher_push_argv (launcher2, gnome_repo_path);
-              ide_build_result_log_stderr (build_result,
-                                           "Adding missing flatpak repository %s from %s\n",
-                                           gnome_repo_name, gnome_repo_path);
-              process2 = ide_subprocess_launcher_spawn (launcher2, cancellable, &error);
-
-              if (process2 != NULL)
-                ide_build_result_log_subprocess (build_result, process2);
-
-              if (process2 == NULL || !ide_subprocess_wait_check (process2, cancellable, &error))
-                {
-                  g_task_return_error (task, g_steal_pointer (&error));
-                  return;
-                }
-            }
-
-          /* Install the runtime */
-          if (runtime == NULL && g_strcmp0 (self->platform, "org.gnome.Platform") == 0)
-            {
-              g_autoptr(IdeSubprocessLauncher) launcher3 = NULL;
-              g_autoptr(IdeSubprocess) process3 = NULL;
-
-              launcher3 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME 
(self), &error);
-              if (launcher3 == NULL)
-                {
-                  g_task_return_error (task, g_steal_pointer (&error));
-                  return;
-                }
-              ide_subprocess_launcher_push_argv (launcher3, "flatpak");
-              ide_subprocess_launcher_push_argv (launcher3, "install");
-              ide_subprocess_launcher_push_argv (launcher3, "--user");
-              ide_subprocess_launcher_push_argv (launcher3, "--runtime");
-              ide_subprocess_launcher_push_argv (launcher3, gnome_repo_name);
-              ide_subprocess_launcher_push_argv (launcher3, self->platform);
-              ide_subprocess_launcher_push_argv (launcher3, self->branch);
-              ide_build_result_log_stderr (build_result,
-                                           "Installing missing flatpak runtime %s (%s)\n",
-                                           self->platform, self->branch);
-              process3 = ide_subprocess_launcher_spawn (launcher3, cancellable, &error);
-
-              if (process3 != NULL)
-                ide_build_result_log_subprocess (build_result, process3);
-
-              if (process3 == NULL || !ide_subprocess_wait_check (process3, cancellable, &error))
-                {
-                  g_task_return_error (task, g_steal_pointer (&error));
-                  return;
-                }
-            }
-
-          /* Install the sdk */
-          if (sdk == NULL && g_strcmp0 (self->sdk, "org.gnome.Sdk") == 0)
-            {
-              g_autoptr(IdeSubprocessLauncher) launcher4 = NULL;
-              g_autoptr(IdeSubprocess) process4 = NULL;
-
-              launcher4 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME 
(self), &error);
-              if (launcher4 == NULL)
-                {
-                  g_task_return_error (task, g_steal_pointer (&error));
-                  return;
-                }
-              ide_subprocess_launcher_push_argv (launcher4, "flatpak");
-              ide_subprocess_launcher_push_argv (launcher4, "install");
-              ide_subprocess_launcher_push_argv (launcher4, "--user");
-              ide_subprocess_launcher_push_argv (launcher4, "--runtime");
-              ide_subprocess_launcher_push_argv (launcher4, gnome_repo_name);
-              ide_subprocess_launcher_push_argv (launcher4, self->sdk);
-              ide_subprocess_launcher_push_argv (launcher4, self->branch);
-              ide_build_result_log_stderr (build_result,
-                                           "Installing missing flatpak SDK %s (%s)\n",
-                                           self->sdk, self->branch);
-              process4 = ide_subprocess_launcher_spawn (launcher4, cancellable, &error);
-
-              if (process4 != NULL)
-                ide_build_result_log_subprocess (build_result, process4);
-
-              if (process4 == NULL || !ide_subprocess_wait_check (process4, cancellable, &error))
-                {
-                  g_task_return_error (task, g_steal_pointer (&error));
-                  return;
-                }
-            }
-        }
-
-      /* No need to run flatpak-builder if there are no dependencies */
-      if (has_multiple_modules)
-        {
-          g_autoptr(IdeSubprocessLauncher) launcher5 = NULL;
-          g_autoptr(IdeSubprocess) process5 = NULL;
-          g_autoptr(GFile) success_file = NULL;
-          g_autofree gchar *stop_at_option = NULL;
-          g_autofree gchar *success_filename = NULL;
-
-          success_filename = g_build_filename (build_path, "flatpak-builder-success", NULL);
-          success_file = g_file_new_for_path (success_filename);
-          if (g_file_query_exists (success_file, cancellable))
-            {
-              g_task_return_boolean (task, TRUE);
-              return;
-            }
-
-          /* Run flatpak-builder to build just the dependencies */
-          launcher5 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME 
(self), &error);
-          if (launcher5 == NULL)
-            {
-              g_task_return_error (task, g_steal_pointer (&error));
-              return;
-            }
-          ide_subprocess_launcher_push_argv (launcher5, "flatpak-builder");
-          ide_subprocess_launcher_push_argv (launcher5, "--ccache");
-          ide_subprocess_launcher_push_argv (launcher5, "--force-clean");
-          stop_at_option = g_strdup_printf ("--stop-at=%s", self->primary_module);
-          ide_subprocess_launcher_push_argv (launcher5, stop_at_option);
-          ide_subprocess_launcher_push_argv (launcher5, build_path);
-          ide_subprocess_launcher_push_argv (launcher5, manifest_path);
-          process5 = ide_subprocess_launcher_spawn (launcher5, cancellable, &error);
-
-          if (process5 == NULL)
-            {
-              g_task_return_error (task, g_steal_pointer (&error));
-              return;
-            }
-          ide_build_result_log_subprocess (build_result, process5);
-          if (!ide_subprocess_wait_check (process5, cancellable, &error))
-            {
-              g_task_return_error (task, g_steal_pointer (&error));
-              return;
-            }
-
-          /*
-           * Make a file indicating that flatpak-builder finished successfully,
-           * so we know whether to run it for the next build.
-           */
-          g_object_unref (g_file_create (success_file, 0, cancellable, NULL));
-
-          g_task_return_boolean (task, TRUE);
-          return;
-        }
-    }
-
-  /* Run flatpak build-init */
-  if (!already_ran_build_init)
-    {
-      const gchar *app_id = NULL;
-      g_autoptr(IdeSubprocessLauncher) launcher6 = NULL;
-      g_autoptr(IdeSubprocess) process6 = NULL;
-
-      app_id = self->app_id;
-      if (ide_str_empty0 (app_id))
-        {
-          g_warning ("Could not determine application ID");
-          app_id = "org.gnome.FlatpakApp";
-        }
-
-      launcher6 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME (self), 
&error);
-      if (launcher6 == NULL)
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-      ide_subprocess_launcher_push_argv (launcher6, "flatpak");
-      ide_subprocess_launcher_push_argv (launcher6, "build-init");
-      ide_subprocess_launcher_push_argv (launcher6, build_path);
-      ide_subprocess_launcher_push_argv (launcher6, app_id);
-      ide_subprocess_launcher_push_argv (launcher6, self->sdk);
-      ide_subprocess_launcher_push_argv (launcher6, self->platform);
-      ide_subprocess_launcher_push_argv (launcher6, self->branch);
-      process6 = ide_subprocess_launcher_spawn (launcher6, cancellable, &error);
-
-      if (process6 == NULL)
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-      ide_build_result_log_subprocess (build_result, process6);
-      if (!ide_subprocess_wait_check (process6, cancellable, &error))
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-    }
-
-  g_task_return_boolean (task, TRUE);
-}
-
-static void
-gbp_flatpak_runtime_prebuild_async (IdeRuntime          *runtime,
-                                    IdeBuildResult      *build_result,
-                                    GCancellable        *cancellable,
-                                    GAsyncReadyCallback  callback,
-                                    gpointer             user_data)
-{
-  GbpFlatpakRuntime *self = (GbpFlatpakRuntime *)runtime;
-  g_autoptr(GTask) task = NULL;
-
-  g_assert (GBP_IS_FLATPAK_RUNTIME (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_set_task_data (task, g_object_ref (build_result), (GDestroyNotify)g_object_unref);
-  g_task_run_in_thread (task, gbp_flatpak_runtime_prebuild_worker);
-}
-
-static gboolean
-gbp_flatpak_runtime_prebuild_finish (IdeRuntime    *runtime,
-                                     GAsyncResult  *result,
-                                     GError       **error)
-{
-  GbpFlatpakRuntime *self = (GbpFlatpakRuntime *)runtime;
-
-  g_assert (GBP_IS_FLATPAK_RUNTIME (self));
-  g_assert (G_IS_TASK (result));
-
-  return g_task_propagate_boolean (G_TASK (result), error);
-}
-
-static void
-gbp_flatpak_runtime_postinstall_worker (GTask        *task,
-                                        gpointer      source_object,
-                                        gpointer      task_data,
-                                        GCancellable *cancellable)
-{
-  GbpFlatpakRuntime *self = source_object;
-  IdeBuildResult *build_result = (IdeBuildResult *)task_data;
-  IdeContext *context;
-  IdeConfigurationManager *config_manager;
-  IdeConfiguration *configuration;
-  const gchar *repo_name = NULL;
-  const gchar *app_id = NULL;
-  g_autofree gchar *repo_path = NULL;
-  g_autofree gchar *build_path = NULL;
-  g_autofree gchar *manifest_path = NULL;
-  g_autofree gchar *export_path = NULL;
-  g_autoptr(GFile) export_dir = NULL;
-  g_autoptr(IdeSubprocessLauncher) launcher2 = NULL;
-  g_autoptr(IdeSubprocessLauncher) launcher3 = NULL;
-  g_autoptr(IdeSubprocessLauncher) launcher4 = NULL;
-  g_autoptr(IdeSubprocess) process2 = NULL;
-  g_autoptr(IdeSubprocess) process3 = NULL;
-  g_autoptr(IdeSubprocess) process4 = NULL;
-  g_autoptr(GError) error = NULL;
-
-  g_assert (G_IS_TASK (task));
-  g_assert (GBP_IS_FLATPAK_RUNTIME (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  context = ide_object_get_context (IDE_OBJECT (self));
-  config_manager = ide_context_get_configuration_manager (context);
-  configuration = ide_configuration_manager_get_current (config_manager);
-
-  build_path = get_build_directory (self);
-  repo_name = ide_configuration_get_internal_string (configuration, "flatpak-repo-name");
-  repo_path = g_file_get_path (ide_configuration_get_internal_object (configuration, "flatpak-repo-dir"));
-
-  g_assert (!ide_str_empty0 (repo_name));
-  g_assert (!ide_str_empty0 (repo_path));
-
-  /* Check if flatpak build-finish has already been run by checking for the export directory */
-  export_path = g_build_filename (build_path, "export", NULL);
-  export_dir = g_file_new_for_path (export_path);
-  g_assert (export_dir != NULL);
-  if (!g_file_query_exists (export_dir, cancellable))
-    {
-      g_autoptr(IdeSubprocessLauncher) launcher = NULL;
-      g_autoptr(IdeSubprocess) process = NULL;
-      JsonArray *finish_args = NULL;
-      const gchar *command = NULL;
-      JsonParser *parser = NULL;
-
-      /* Attempt to parse the flatpak manifest */
-      if (self->manifest != NULL && (manifest_path = g_file_get_path (self->manifest)))
-        {
-          GError *json_error = NULL;
-          JsonObject *root_object;
-
-          parser = json_parser_new ();
-          json_parser_load_from_file (parser, manifest_path, &json_error);
-          if (json_error)
-            g_debug ("Error parsing flatpak manifest %s: %s", manifest_path, json_error->message);
-          else
-            {
-              root_object = json_node_get_object (json_parser_get_root (parser));
-              if (root_object != NULL)
-                {
-                  if (json_object_has_member (root_object, "command"))
-                    command = json_object_get_string_member (root_object, "command");
-                  if (json_object_has_member (root_object, "finish-args"))
-                    finish_args = json_object_get_array_member (root_object, "finish-args");
-                }
-            }
-        }
-
-      /* Finalize the build directory */
-      launcher = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME (self), 
&error);
-      if (launcher == NULL)
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-      ide_subprocess_launcher_push_argv (launcher, "flatpak");
-      ide_subprocess_launcher_push_argv (launcher, "build-finish");
-      if (!ide_str_empty0 (command))
-        {
-          g_autofree gchar *command_option = NULL;
-          command_option = g_strdup_printf ("--command=%s", command);
-          ide_subprocess_launcher_push_argv (launcher, command_option);
-        }
-      if (finish_args != NULL)
-        {
-          for (guint i = 0; i < json_array_get_length (finish_args); i++)
-            {
-              const gchar *arg;
-              arg = json_array_get_string_element (finish_args, i);
-              if (!ide_str_empty0 (arg))
-                ide_subprocess_launcher_push_argv (launcher, arg);
-            }
-        }
-      ide_subprocess_launcher_push_argv (launcher, build_path);
-
-      g_clear_object (&parser);
-
-      process = ide_subprocess_launcher_spawn (launcher, cancellable, &error);
-
-      if (process == NULL)
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-      ide_build_result_log_subprocess (build_result, process);
-      if (!ide_subprocess_wait_check (process, cancellable, &error))
-        {
-          g_task_return_error (task, g_steal_pointer (&error));
-          return;
-        }
-    }
-
-  /* Export the build to the repo */
-  launcher2 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME (self), 
&error);
-  if (launcher2 == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_subprocess_launcher_push_argv (launcher2, "flatpak");
-  ide_subprocess_launcher_push_argv (launcher2, "build-export");
-  ide_subprocess_launcher_push_argv (launcher2, "--subject=\"Development build\"");
-  ide_subprocess_launcher_push_argv (launcher2, repo_path);
-  ide_subprocess_launcher_push_argv (launcher2, build_path);
-  process2 = ide_subprocess_launcher_spawn (launcher2, cancellable, &error);
-
-  if (process2 == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_build_result_log_subprocess (build_result, process2);
-  if (!ide_subprocess_wait_check (process2, cancellable, &error))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-
-  app_id = self->app_id;
-  if (ide_str_empty0 (app_id))
-    {
-      g_warning ("Could not determine application ID");
-      app_id = "org.gnome.FlatpakApp";
-    }
-  /* Try to uninstall it in case this isn't the first run */
-  launcher3 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME (self), 
&error);
-  if (launcher3 == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_subprocess_launcher_push_argv (launcher3, "flatpak");
-  ide_subprocess_launcher_push_argv (launcher3, "uninstall");
-  ide_subprocess_launcher_push_argv (launcher3, "--user");
-  ide_subprocess_launcher_push_argv (launcher3, app_id);
-  process3 = ide_subprocess_launcher_spawn (launcher3, cancellable, &error);
-
-  if (process3 == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_subprocess_wait (process3, cancellable, NULL);
-
-  /* Finally install the app */
-  launcher4 = IDE_RUNTIME_CLASS (gbp_flatpak_runtime_parent_class)->create_launcher (IDE_RUNTIME (self), 
&error);
-  if (launcher4 == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_subprocess_launcher_push_argv (launcher4, "flatpak");
-  ide_subprocess_launcher_push_argv (launcher4, "install");
-  ide_subprocess_launcher_push_argv (launcher4, "--user");
-  ide_subprocess_launcher_push_argv (launcher4, "--app");
-  ide_subprocess_launcher_push_argv (launcher4, "--no-deps");
-  ide_subprocess_launcher_push_argv (launcher4, repo_name);
-  ide_subprocess_launcher_push_argv (launcher4, app_id);
-
-  process4 = ide_subprocess_launcher_spawn (launcher4, cancellable, &error);
-
-  if (process4 == NULL)
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-  ide_build_result_log_subprocess (build_result, process4);
-  if (!ide_subprocess_wait_check (process4, cancellable, &error))
-    {
-      g_task_return_error (task, g_steal_pointer (&error));
-      return;
-    }
-
-  g_task_return_boolean (task, TRUE);
-}
-
-static void
-gbp_flatpak_runtime_postinstall_async (IdeRuntime          *runtime,
-                                       IdeBuildResult      *build_result,
-                                       GCancellable        *cancellable,
-                                       GAsyncReadyCallback  callback,
-                                       gpointer             user_data)
-{
-  GbpFlatpakRuntime *self = (GbpFlatpakRuntime *)runtime;
-  g_autoptr(GTask) task = NULL;
-
-  g_assert (GBP_IS_FLATPAK_RUNTIME (self));
-  g_assert (IDE_IS_BUILD_RESULT (build_result));
-  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
-
-  task = g_task_new (self, cancellable, callback, user_data);
-  g_task_set_task_data (task, g_object_ref (build_result), (GDestroyNotify)g_object_unref);
-  g_task_run_in_thread (task, gbp_flatpak_runtime_postinstall_worker);
-}
-
-static gboolean
-gbp_flatpak_runtime_postinstall_finish (IdeRuntime    *runtime,
-                                        GAsyncResult  *result,
-                                        GError       **error)
-{
-  GbpFlatpakRuntime *self = (GbpFlatpakRuntime *)runtime;
-
-  g_assert (GBP_IS_FLATPAK_RUNTIME (self));
-  g_assert (G_IS_TASK (result));
-
-  return g_task_propagate_boolean (G_TASK (result), error);
-}
-
 static IdeSubprocessLauncher *
 gbp_flatpak_runtime_create_launcher (IdeRuntime  *runtime,
                                      GError     **error)
@@ -958,6 +288,7 @@ gbp_flatpak_runtime_prepare_configuration (IdeRuntime       *runtime,
                                            IdeConfiguration *configuration)
 {
   GbpFlatpakRuntime* self = (GbpFlatpakRuntime *)runtime;
+  g_autofree gchar *manifest_path = NULL;
 
   g_assert (GBP_IS_FLATPAK_RUNTIME (self));
   g_assert (IDE_IS_CONFIGURATION (configuration));
@@ -968,8 +299,77 @@ gbp_flatpak_runtime_prepare_configuration (IdeRuntime       *runtime,
         ide_configuration_set_app_id (configuration, self->app_id);
     }
 
+  if (self->manifest != NULL)
+    manifest_path = g_file_get_path (self->manifest);
+
   ide_configuration_set_prefix (configuration, "/app");
+
+  /*
+   * TODO: Move this to a GbpFlatpakConfiguration
+   *
+   * Parse some stuff to use later when building.
+   * This really belongs in an IdeConfiguration subclass.
+   */
+
   ide_configuration_set_internal_string (configuration, "flatpak-repo-name", FLATPAK_REPO_NAME);
+  ide_configuration_set_internal_string (configuration, "flatpak-sdk", self->sdk);
+  ide_configuration_set_internal_string (configuration, "flatpak-runtime", self->platform);
+  ide_configuration_set_internal_string (configuration, "flatpak-branch", self->branch);
+  ide_configuration_set_internal_string (configuration, "flatpak-module", self->primary_module);
+  ide_configuration_set_internal_string (configuration, "flatpak-manifest", manifest_path);
+
+  {
+    g_autoptr(JsonParser) parser = NULL;
+    g_autoptr(GError) error = NULL;
+
+    parser = json_parser_new ();
+
+    if (json_parser_load_from_file (parser, manifest_path, &error))
+      {
+        JsonNode *root;
+        JsonNode *member;
+        JsonObject *root_object;
+        JsonArray *ar;
+
+        if (NULL != (root = json_parser_get_root (parser)) &&
+            JSON_NODE_HOLDS_OBJECT (root) &&
+            NULL != (root_object = json_node_get_object (root)))
+          {
+            if (json_object_has_member (root_object, "command"))
+              ide_configuration_set_internal_string (configuration,
+                                                     "flatpak-command",
+                                                     json_object_get_string_member (root_object, "command"));
+
+            if (json_object_has_member (root_object, "finish-args") &&
+                NULL != (member = json_object_get_member (root_object, "finish-args")) &&
+                JSON_NODE_HOLDS_ARRAY (member) &&
+                NULL != (ar = json_node_get_array (member)))
+              {
+                g_autoptr(GPtrArray) finish_args = NULL;
+                guint length = json_array_get_length (ar);
+
+                finish_args = g_ptr_array_sized_new (length + 1);
+
+                for (guint i = 0; i < length; i++)
+                  {
+                    JsonNode *ele = json_array_get_element (ar, i);
+                    const gchar *str = json_node_get_string (ele);
+
+                    if (str != NULL)
+                      g_ptr_array_add (finish_args, (gchar *)str);
+                  }
+
+                g_ptr_array_add (finish_args, NULL);
+
+                ide_configuration_set_internal_strv (configuration,
+                                                     "flatpak-finish-args",
+                                                     (const gchar * const *)finish_args->pdata);
+              }
+          }
+      }
+    else
+      g_warning ("Failure to parse Flatpak Manifest: %s", error->message);
+  }
 }
 
 static void
@@ -1155,10 +555,6 @@ gbp_flatpak_runtime_class_init (GbpFlatpakRuntimeClass *klass)
   object_class->get_property = gbp_flatpak_runtime_get_property;
   object_class->set_property = gbp_flatpak_runtime_set_property;
 
-  runtime_class->prebuild_async = gbp_flatpak_runtime_prebuild_async;
-  runtime_class->prebuild_finish = gbp_flatpak_runtime_prebuild_finish;
-  runtime_class->postinstall_async = gbp_flatpak_runtime_postinstall_async;
-  runtime_class->postinstall_finish = gbp_flatpak_runtime_postinstall_finish;
   runtime_class->create_launcher = gbp_flatpak_runtime_create_launcher;
   runtime_class->create_runner = gbp_flatpak_runtime_create_runner;
   runtime_class->contains_program_in_path = gbp_flatpak_runtime_contains_program_in_path;
diff --git a/plugins/flatpak/gbp-flatpak-transfer.c b/plugins/flatpak/gbp-flatpak-transfer.c
new file mode 100644
index 0000000..39687b2
--- /dev/null
+++ b/plugins/flatpak/gbp-flatpak-transfer.c
@@ -0,0 +1,477 @@
+/* gbp-flatpak-transfer.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "gbp-flatpak-transfer"
+
+#include <flatpak.h>
+#include <glib/gi18n.h>
+
+#include "gbp-flatpak-transfer.h"
+
+struct _GbpFlatpakTransfer
+{
+  IdeObject parent_instance;
+
+  gchar   *id;
+  gchar   *arch;
+  gchar   *branch;
+
+  guint    force_update : 1;
+
+  GMutex   mutex;
+  gchar   *status;
+  gdouble  progress;
+};
+
+enum {
+  PROP_0,
+  PROP_ID,
+  PROP_ARCH,
+  PROP_BRANCH,
+  PROP_FORCE_UPDATE,
+  PROP_TITLE,
+  PROP_ICON_NAME,
+  PROP_PROGRESS,
+  PROP_STATUS,
+  N_PROPS
+};
+
+static void transfer_iface_init (IdeTransferInterface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (GbpFlatpakTransfer, gbp_flatpak_transfer, IDE_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (IDE_TYPE_TRANSFER, transfer_iface_init))
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+progress_callback (const gchar *status,
+                   guint        progress,
+                   gboolean     estimating,
+                   gpointer     user_data)
+{
+  GbpFlatpakTransfer *self = user_data;
+
+  g_assert (GBP_IS_FLATPAK_TRANSFER (self));
+
+  g_mutex_lock (&self->mutex);
+  g_free (self->status);
+  self->status = g_strdup (status);
+  self->progress = progress / 100.0;
+  g_mutex_unlock (&self->mutex);
+
+  ide_object_notify_in_main (self, properties[PROP_PROGRESS]);
+  ide_object_notify_in_main (self, properties[PROP_STATUS]);
+}
+
+static gboolean
+update_installation (GbpFlatpakTransfer   *self,
+                     FlatpakInstallation  *installation,
+                     GCancellable         *cancellable,
+                     GError              **error)
+{
+  g_autoptr(FlatpakInstalledRef) ref = NULL;
+
+  g_assert (GBP_IS_FLATPAK_TRANSFER (self));
+  g_assert (FLATPAK_IS_INSTALLATION (installation));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  ref = flatpak_installation_update (installation,
+                                     FLATPAK_UPDATE_FLAGS_NONE,
+                                     FLATPAK_REF_KIND_RUNTIME,
+                                     self->id,
+                                     self->arch,
+                                     self->branch,
+                                     progress_callback,
+                                     self,
+                                     cancellable,
+                                     error);
+
+  return ref != NULL;
+}
+
+static gboolean
+install_from_remote (GbpFlatpakTransfer   *self,
+                     FlatpakInstallation  *installation,
+                     FlatpakRemote        *remote,
+                     GCancellable         *cancellable,
+                     GError              **error)
+{
+  g_autoptr(FlatpakInstalledRef) ref = NULL;
+
+  g_assert (GBP_IS_FLATPAK_TRANSFER (self));
+  g_assert (FLATPAK_IS_INSTALLATION (installation));
+  g_assert (FLATPAK_IS_REMOTE (remote));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  ref = flatpak_installation_install (installation,
+                                      flatpak_remote_get_name (remote),
+                                      FLATPAK_REF_KIND_RUNTIME,
+                                      self->id,
+                                      self->arch,
+                                      self->branch,
+                                      progress_callback,
+                                      self,
+                                      cancellable,
+                                      error);
+
+  return ref != NULL;
+}
+
+static void
+gbp_flatpak_transfer_execute_worker (GTask        *task,
+                                     gpointer      source_object,
+                                     gpointer      task_data,
+                                     GCancellable *cancellable)
+{
+  GbpFlatpakTransfer *self = source_object;
+  FlatpakInstallation *installations[2] = { NULL };
+  g_autoptr(FlatpakInstallation) user = NULL;
+  g_autoptr(FlatpakInstallation) system = NULL;
+
+  g_assert (GBP_IS_FLATPAK_TRANSFER (self));
+  g_assert (G_IS_TASK (task));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  /*
+   * Load the installations.
+   */
+
+  installations[0] = user = flatpak_installation_new_user (cancellable, NULL);
+  installations[1] = system = flatpak_installation_new_system (cancellable, NULL);
+
+  /*
+   * Locate the id within a previous installation;
+   */
+
+  for (guint i = 0; i < G_N_ELEMENTS (installations); i++)
+    {
+      FlatpakInstallation *installation = installations[i];
+      g_autoptr(GError) error = NULL;
+      g_autoptr(GPtrArray) refs = NULL;
+
+      if (installation == NULL)
+        continue;
+
+      refs = flatpak_installation_list_installed_refs (installation, cancellable, &error);
+
+      if (error != NULL)
+        {
+          g_task_return_error (task, g_steal_pointer (&error));
+          return;
+        }
+
+      for (guint j = 0; j < refs->len; j++)
+        {
+          FlatpakInstalledRef *ref = g_ptr_array_index (refs, i);
+          const gchar *id;
+          const gchar *arch;
+          const gchar *branch;
+
+          g_assert (FLATPAK_IS_INSTALLED_REF (ref));
+
+          id = flatpak_ref_get_name (FLATPAK_REF (ref));
+          arch = flatpak_ref_get_arch (FLATPAK_REF (ref));
+          branch = flatpak_ref_get_branch (FLATPAK_REF (ref));
+
+          if (g_strcmp0 (self->id, id) == 0 &&
+              g_strcmp0 (self->branch, branch) == 0 &&
+              g_strcmp0 (self->arch, arch) == 0)
+            {
+              if (!self->force_update)
+                {
+                  g_task_return_boolean (task, TRUE);
+                  return;
+                }
+
+              if (!update_installation (self, installation, cancellable, &error))
+                g_task_return_error (task, g_steal_pointer (&error));
+              else
+                g_task_return_boolean (task, TRUE);
+
+              return;
+            }
+        }
+    }
+
+  /*
+   * We didn't locate the id under a previous installation, so we need to
+   * locate a remote that has the matching ref and install it from that.
+   */
+
+  for (guint i = 0; i < G_N_ELEMENTS (installations); i++)
+    {
+      FlatpakInstallation *installation = installations[i];
+      g_autoptr(GPtrArray) remotes = NULL;
+      g_autoptr(GError) error = NULL;
+
+      if (installation == NULL)
+        continue;
+
+      remotes = flatpak_installation_list_remotes (installation, cancellable, &error);
+
+      if (error != NULL)
+        {
+          g_task_return_error (task, g_steal_pointer (&error));
+          return;
+        }
+
+      for (guint j = 0; j < remotes->len; j++)
+        {
+          FlatpakRemote *remote = g_ptr_array_index (remotes, j);
+          g_autoptr(GPtrArray) refs = NULL;
+
+          g_assert (FLATPAK_IS_REMOTE (remote));
+
+          refs = flatpak_installation_list_remote_refs_sync (installation,
+                                                             flatpak_remote_get_name (remote),
+                                                             cancellable,
+                                                             &error);
+
+          if (error != NULL)
+            {
+              g_task_return_error (task, g_steal_pointer (&error));
+              return;
+            }
+
+          for (guint k = 0; k < refs->len; k++)
+            {
+              FlatpakRemoteRef *ref = g_ptr_array_index (refs, k);
+              const gchar *id;
+              const gchar *arch;
+              const gchar *branch;
+
+              g_assert (FLATPAK_IS_REMOTE_REF (ref));
+
+              id = flatpak_ref_get_name (FLATPAK_REF (ref));
+              arch = flatpak_ref_get_arch (FLATPAK_REF (ref));
+              branch = flatpak_ref_get_branch (FLATPAK_REF (ref));
+
+              if (g_strcmp0 (self->id, id) == 0 &&
+                  g_strcmp0 (self->branch, branch) == 0 &&
+                  g_strcmp0 (self->arch, arch) == 0)
+                {
+                  if (install_from_remote (self, installation, remote, cancellable, &error))
+                    g_task_return_boolean (task, TRUE);
+                  else
+                    g_task_return_error (task, g_steal_pointer (&error));
+                  return;
+                }
+            }
+        }
+    }
+
+  g_task_return_new_error (task,
+                           G_IO_ERROR,
+                           G_IO_ERROR_NOT_FOUND,
+                           /* Translators: %s is the id of the runtime such as org.gnome.Sdk */
+                           _("Failed to locate %s"),
+                           self->id);
+}
+
+static void
+gbp_flatpak_transfer_execute_async (IdeTransfer         *transfer,
+                                    GCancellable        *cancellable,
+                                    GAsyncReadyCallback  callback,
+                                    gpointer             user_data)
+{
+  GbpFlatpakTransfer *self = (GbpFlatpakTransfer *)transfer;
+  g_autoptr(GTask) task = NULL;
+
+  g_assert (GBP_IS_FLATPAK_TRANSFER (self));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, gbp_flatpak_transfer_execute_async);
+  g_task_run_in_thread (task, gbp_flatpak_transfer_execute_worker);
+}
+
+static gboolean
+gbp_flatpak_transfer_execute_finish (IdeTransfer   *transfer,
+                                     GAsyncResult  *result,
+                                     GError       **error)
+{
+  g_assert (GBP_IS_FLATPAK_TRANSFER (transfer));
+  g_assert (G_IS_TASK (result));
+
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+static void
+transfer_iface_init (IdeTransferInterface *iface)
+{
+  iface->execute_async = gbp_flatpak_transfer_execute_async;
+  iface->execute_finish = gbp_flatpak_transfer_execute_finish;
+}
+
+static void
+gbp_flatpak_transfer_finalize (GObject *object)
+{
+  GbpFlatpakTransfer *self = (GbpFlatpakTransfer *)object;
+
+  g_clear_pointer (&self->id, g_free);
+  g_clear_pointer (&self->arch, g_free);
+  g_clear_pointer (&self->branch, g_free);
+  g_mutex_clear (&self->mutex);
+
+  G_OBJECT_CLASS (gbp_flatpak_transfer_parent_class)->finalize (object);
+}
+
+static void
+gbp_flatpak_transfer_get_property (GObject    *object,
+                                   guint       prop_id,
+                                   GValue     *value,
+                                   GParamSpec *pspec)
+{
+  GbpFlatpakTransfer *self = GBP_FLATPAK_TRANSFER (object);
+
+  switch (prop_id)
+    {
+    case PROP_STATUS:
+      g_mutex_lock (&self->mutex);
+      g_value_set_string (value, self->status);
+      g_mutex_unlock (&self->mutex);
+      break;
+
+    case PROP_TITLE:
+      g_value_take_string (value, g_strdup_printf (_("Installing %s"), self->id));
+      break;
+
+    case PROP_ICON_NAME:
+      g_value_set_string (value, "folder-download-symbolic");
+      break;
+
+    case PROP_PROGRESS:
+      g_mutex_lock (&self->mutex);
+      g_value_set_double (value, self->progress);
+      g_mutex_unlock (&self->mutex);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+gbp_flatpak_transfer_set_property (GObject      *object,
+                                   guint         prop_id,
+                                   const GValue *value,
+                                   GParamSpec   *pspec)
+{
+  GbpFlatpakTransfer *self = GBP_FLATPAK_TRANSFER (object);
+
+  switch (prop_id)
+    {
+    case PROP_ID:
+      self->id = g_value_dup_string (value);
+      break;
+
+    case PROP_ARCH:
+      self->arch = g_value_dup_string (value);
+      if (self->arch == NULL)
+        self->arch = g_strdup (flatpak_get_default_arch ());
+      break;
+
+    case PROP_BRANCH:
+      self->branch = g_value_dup_string (value);
+      if (self->branch == NULL)
+        self->branch = g_strdup ("stable");
+      break;
+
+    case PROP_FORCE_UPDATE:
+      self->force_update = g_value_get_boolean (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+gbp_flatpak_transfer_class_init (GbpFlatpakTransferClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = gbp_flatpak_transfer_finalize;
+  object_class->get_property = gbp_flatpak_transfer_get_property;
+  object_class->set_property = gbp_flatpak_transfer_set_property;
+
+  properties [PROP_ID] =
+    g_param_spec_string ("id", NULL, NULL, NULL,
+                         G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+
+  properties [PROP_ARCH] =
+    g_param_spec_string ("arch", NULL, NULL, NULL,
+                         G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+
+  properties [PROP_BRANCH] =
+    g_param_spec_string ("branch", NULL, NULL, NULL,
+                         G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+  
+  properties [PROP_FORCE_UPDATE] =
+    g_param_spec_boolean ("force-update", NULL, NULL, FALSE,
+                          G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+
+  properties [PROP_STATUS] =
+    g_param_spec_string ("status", NULL, NULL, NULL,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  properties [PROP_TITLE] =
+    g_param_spec_string ("title", NULL, NULL, NULL,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  properties [PROP_ICON_NAME] =
+    g_param_spec_string ("icon-name", NULL, NULL, NULL,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  properties [PROP_PROGRESS] =
+    g_param_spec_double ("progress", NULL, NULL, 0.0, 100.0, 0.0,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+gbp_flatpak_transfer_init (GbpFlatpakTransfer *self)
+{
+  g_mutex_init (&self->mutex);
+}
+
+GbpFlatpakTransfer *
+gbp_flatpak_transfer_new (IdeContext  *context,
+                          const gchar *id,
+                          const gchar *arch,
+                          const gchar *branch,
+                          gboolean     force_update)
+{
+  g_return_val_if_fail (IDE_IS_CONTEXT (context), NULL);
+  g_return_val_if_fail (id != NULL, NULL);
+
+  if (arch == NULL)
+    arch = flatpak_get_default_arch ();
+
+  if (branch == NULL)
+    branch = "stable";
+
+  return g_object_new (GBP_TYPE_FLATPAK_TRANSFER,
+                       "context", context,
+                       "id", id,
+                       "arch", arch,
+                       "branch", branch,
+                       "force-update", force_update,
+                       NULL);
+}
diff --git a/libide/buildsystem/ide-simple-builder.h b/plugins/flatpak/gbp-flatpak-transfer.h
similarity index 53%
rename from libide/buildsystem/ide-simple-builder.h
rename to plugins/flatpak/gbp-flatpak-transfer.h
index 705ef74..ba8390e 100644
--- a/libide/buildsystem/ide-simple-builder.h
+++ b/plugins/flatpak/gbp-flatpak-transfer.h
@@ -1,4 +1,4 @@
-/* ide-simple-builder.h
+/* gbp-flatpak-transfer.h
  *
  * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
@@ -16,32 +16,23 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef IDE_SIMPLE_BUILDER_H
-#define IDE_SIMPLE_BUILDER_H
+#ifndef GBP_FLATPAK_TRANSFER_H
+#define GBP_FLATPAK_TRANSFER_H
 
-#include "buildsystem/ide-builder.h"
-#include "buildsystem/ide-configuration.h"
+#include <ide.h>
 
 G_BEGIN_DECLS
 
-#define IDE_TYPE_SIMPLE_BUILDER (ide_simple_builder_get_type())
+#define GBP_TYPE_FLATPAK_TRANSFER (gbp_flatpak_transfer_get_type())
 
-G_DECLARE_DERIVABLE_TYPE (IdeSimpleBuilder, ide_simple_builder, IDE, SIMPLE_BUILDER, IdeBuilder)
+G_DECLARE_FINAL_TYPE (GbpFlatpakTransfer, gbp_flatpak_transfer, GBP, FLATPAK_TRANSFER, IdeObject)
 
-struct _IdeSimpleBuilderClass
-{
-  IdeBuilderClass parent_class;
-
-  gpointer _reserved1;
-  gpointer _reserved2;
-  gpointer _reserved3;
-  gpointer _reserved4;
-  gpointer _reserved5;
-  gpointer _reserved6;
-  gpointer _reserved7;
-  gpointer _reserved8;
-};
+GbpFlatpakTransfer *gbp_flatpak_transfer_new (IdeContext  *context,
+                                              const gchar *id,
+                                              const gchar *arch,
+                                              const gchar *branch,
+                                              gboolean     force_update);
 
 G_END_DECLS
 
-#endif /* IDE_SIMPLE_BUILDER_H */
+#endif /* GBP_FLATPAK_TRANSFER_H */
diff --git a/plugins/flatpak/gbp-flatpak-util.c b/plugins/flatpak/gbp-flatpak-util.c
new file mode 100644
index 0000000..c67a1bd
--- /dev/null
+++ b/plugins/flatpak/gbp-flatpak-util.c
@@ -0,0 +1,69 @@
+/* gbp-flatpak-util.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "gbp-flatpak-util"
+
+#include "gbp-flatpak-util.h"
+
+gchar *
+gbp_flatpak_get_repo_dir (IdeConfiguration *configuration)
+{
+  const gchar *project_id;
+  const gchar *runtime_id;
+  IdeContext *context;
+  IdeProject *project;
+
+  g_assert (IDE_IS_CONFIGURATION (configuration));
+
+  runtime_id = ide_configuration_get_runtime_id (configuration);
+  context = ide_object_get_context (IDE_OBJECT (configuration));
+  project = ide_context_get_project (context);
+  project_id = ide_project_get_id (project);
+
+  return g_build_filename (g_get_user_cache_dir (),
+                           "gnome-builder",
+                           "flatpak",
+                           "repos",
+                           project_id,
+                           runtime_id,
+                           NULL);
+}
+
+gchar *
+gbp_flatpak_get_staging_dir (IdeConfiguration *configuration)
+{
+  const gchar *project_id;
+  const gchar *runtime_id;
+  IdeContext *context;
+  IdeProject *project;
+
+  g_assert (IDE_IS_CONFIGURATION (configuration));
+
+  runtime_id = ide_configuration_get_runtime_id (configuration);
+  context = ide_object_get_context (IDE_OBJECT (configuration));
+  project = ide_context_get_project (context);
+  project_id = ide_project_get_id (project);
+
+  return g_build_filename (g_get_user_cache_dir (),
+                           "gnome-builder",
+                           "flatpak",
+                           "staging",
+                           project_id,
+                           runtime_id,
+                           NULL);
+}
diff --git a/plugins/gcc/gbp-gcc-build-result-addin.h b/plugins/flatpak/gbp-flatpak-util.h
similarity index 63%
copy from plugins/gcc/gbp-gcc-build-result-addin.h
copy to plugins/flatpak/gbp-flatpak-util.h
index 2a77a0b..f3afc22 100644
--- a/plugins/gcc/gbp-gcc-build-result-addin.h
+++ b/plugins/flatpak/gbp-flatpak-util.h
@@ -1,6 +1,6 @@
-/* gbp-gcc-build-result-addin.h
+/* gbp-flatpak-util.h
  *
- * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,17 +16,16 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef GBP_GCC_BUILD_RESULT_ADDIN_H
-#define GBP_GCC_BUILD_RESULT_ADDIN_H
+#ifndef GBP_FLATPAK_UTIL_H
+#define GBP_FLATPAK_UTIL_H
 
 #include <ide.h>
 
 G_BEGIN_DECLS
 
-#define GBP_TYPE_GCC_BUILD_RESULT_ADDIN (gbp_gcc_build_result_addin_get_type())
-
-G_DECLARE_FINAL_TYPE (GbpGccBuildResultAddin, gbp_gcc_build_result_addin, GBP, GCC_BUILD_RESULT_ADDIN, 
IdeObject)
+gchar *gbp_flatpak_get_repo_dir    (IdeConfiguration *configuration);
+gchar *gbp_flatpak_get_staging_dir (IdeConfiguration *configuration);
 
 G_END_DECLS
 
-#endif /* GBP_GCC_BUILD_RESULT_ADDIN_H */
+#endif /* GBP_FLATPAK_UTIL_H */
diff --git a/plugins/gcc/Makefile.am b/plugins/gcc/Makefile.am
index b772044..1e269c4 100644
--- a/plugins/gcc/Makefile.am
+++ b/plugins/gcc/Makefile.am
@@ -7,8 +7,8 @@ plugin_LTLIBRARIES = libgcc-plugin.la
 dist_plugin_DATA = gcc.plugin
 
 libgcc_plugin_la_SOURCES = \
-       gbp-gcc-build-result-addin.c \
-       gbp-gcc-build-result-addin.h \
+       gbp-gcc-pipeline-addin.c \
+       gbp-gcc-pipeline-addin.h \
        gbp-gcc-plugin.c
 
 libgcc_plugin_la_CFLAGS = $(PLUGIN_CFLAGS)
diff --git a/plugins/gcc/gbp-gcc-pipeline-addin.c b/plugins/gcc/gbp-gcc-pipeline-addin.c
new file mode 100644
index 0000000..d73b68f
--- /dev/null
+++ b/plugins/gcc/gbp-gcc-pipeline-addin.c
@@ -0,0 +1,74 @@
+/* gbp-gcc-pipeline-addin.c
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "gbp-gcc-pipeline-addin"
+
+#include "gbp-gcc-pipeline-addin.h"
+
+#define ERROR_FORMAT_REGEX              \
+  "(?<filename>[a-zA-Z0-9\\-\\.\\/]+):" \
+  "(?<line>\\d+):"                      \
+  "(?<column>\\d+): "                   \
+  "(?<level>[\\w\\s]+): "               \
+  "(?<message>.*)"
+
+struct _GbpGccPipelineAddin
+{
+  IdeObject parent_instance;
+  guint     error_format_id;
+};
+
+static void
+gbp_gcc_pipeline_addin_load (IdeBuildPipelineAddin *addin,
+                             IdeBuildPipeline      *pipeline)
+{
+  GbpGccPipelineAddin *self = (GbpGccPipelineAddin *)addin;
+
+  g_assert (GBP_IS_GCC_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  self->error_format_id = ide_build_pipeline_add_error_format (pipeline,
+                                                               ERROR_FORMAT_REGEX,
+                                                               G_REGEX_CASELESS);
+}
+
+static void
+gbp_gcc_pipeline_addin_unload (IdeBuildPipelineAddin *addin,
+                               IdeBuildPipeline      *pipeline)
+{
+  GbpGccPipelineAddin *self = (GbpGccPipelineAddin *)addin;
+
+  g_assert (GBP_IS_GCC_PIPELINE_ADDIN (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  ide_build_pipeline_remove_error_format (pipeline, self->error_format_id);
+  self->error_format_id = 0;
+}
+
+static void
+addin_iface_init (IdeBuildPipelineAddinInterface *iface)
+{
+  iface->load = gbp_gcc_pipeline_addin_load;
+  iface->unload = gbp_gcc_pipeline_addin_unload;
+}
+
+G_DEFINE_TYPE_WITH_CODE (GbpGccPipelineAddin, gbp_gcc_pipeline_addin, IDE_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (IDE_TYPE_BUILD_PIPELINE_ADDIN, addin_iface_init))
+
+static void gbp_gcc_pipeline_addin_class_init (GbpGccPipelineAddinClass *klass) { }
+static void gbp_gcc_pipeline_addin_init (GbpGccPipelineAddin *self) { }
diff --git a/plugins/gcc/gbp-gcc-build-result-addin.h b/plugins/gcc/gbp-gcc-pipeline-addin.h
similarity index 63%
rename from plugins/gcc/gbp-gcc-build-result-addin.h
rename to plugins/gcc/gbp-gcc-pipeline-addin.h
index 2a77a0b..ac614da 100644
--- a/plugins/gcc/gbp-gcc-build-result-addin.h
+++ b/plugins/gcc/gbp-gcc-pipeline-addin.h
@@ -1,6 +1,6 @@
-/* gbp-gcc-build-result-addin.h
+/* gbp-gcc-pipeline-addin.h
  *
- * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,17 +16,17 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef GBP_GCC_BUILD_RESULT_ADDIN_H
-#define GBP_GCC_BUILD_RESULT_ADDIN_H
+#ifndef GBP_GCC_PIPELINE_ADDIN_H
+#define GBP_GCC_PIPELINE_ADDIN_H
 
 #include <ide.h>
 
 G_BEGIN_DECLS
 
-#define GBP_TYPE_GCC_BUILD_RESULT_ADDIN (gbp_gcc_build_result_addin_get_type())
+#define GBP_TYPE_GCC_PIPELINE_ADDIN (gbp_gcc_pipeline_addin_get_type())
 
-G_DECLARE_FINAL_TYPE (GbpGccBuildResultAddin, gbp_gcc_build_result_addin, GBP, GCC_BUILD_RESULT_ADDIN, 
IdeObject)
+G_DECLARE_FINAL_TYPE (GbpGccPipelineAddin, gbp_gcc_pipeline_addin, GBP, GCC_PIPELINE_ADDIN, IdeObject)
 
 G_END_DECLS
 
-#endif /* GBP_GCC_BUILD_RESULT_ADDIN_H */
+#endif /* GBP_GCC_PIPELINE_ADDIN_H */
diff --git a/plugins/gcc/gbp-gcc-plugin.c b/plugins/gcc/gbp-gcc-plugin.c
index 5504323..d3ea3b2 100644
--- a/plugins/gcc/gbp-gcc-plugin.c
+++ b/plugins/gcc/gbp-gcc-plugin.c
@@ -19,12 +19,10 @@
 #include <ide.h>
 #include <libpeas/peas.h>
 
-#include "gbp-gcc-build-result-addin.h"
+#include "gbp-gcc-pipeline-addin.h"
 
 void
 peas_register_types (PeasObjectModule *module)
 {
-  peas_object_module_register_extension_type (module,
-                                              IDE_TYPE_BUILD_RESULT_ADDIN,
-                                              GBP_TYPE_GCC_BUILD_RESULT_ADDIN);
+  peas_object_module_register_extension_type (module, IDE_TYPE_BUILD_PIPELINE_ADDIN, 
GBP_TYPE_GCC_PIPELINE_ADDIN);
 }
diff --git a/plugins/todo/todo_plugin/__init__.py b/plugins/todo/todo_plugin/__init__.py
index 0bc0096..2afd70c 100644
--- a/plugins/todo/todo_plugin/__init__.py
+++ b/plugins/todo/todo_plugin/__init__.py
@@ -89,6 +89,9 @@ class TodoWorkbenchAddin(GObject.Object, Ide.WorkbenchAddin):
         # can be navigated to quickly.
         self.mine(file, prepend=True)
 
+    def _is_ignored_pattern(self, name):
+        return name.endswith('.m4') or name.endswith('.in')
+
     def _post_from_main(self, args):
         items, prepend = args
 
@@ -97,7 +100,7 @@ class TodoWorkbenchAddin(GObject.Object, Ide.WorkbenchAddin):
 
         for item in items:
             file = item.props.file
-            if vcs.is_ignored(file) or file.get_basename().endswith('.m4'):
+            if vcs.is_ignored(file) or self._is_ignored_pattern(file.get_basename()):
                 continue
             self.panel.add_item(item, prepend=prepend)
 
diff --git a/plugins/vala-pack/Makefile.am b/plugins/vala-pack/Makefile.am
index 187b7cc..8f1e85a 100644
--- a/plugins/vala-pack/Makefile.am
+++ b/plugins/vala-pack/Makefile.am
@@ -94,6 +94,7 @@ libvala_pack_plugin_la_CFLAGS = \
        -Wno-unused-but-set-variable \
        -Wno-unused-label \
        -Wno-unused-function \
+       -Wno-unused-variable \
        $(NULL)
 
 libvala_pack_plugin_la_LIBADD = $(VALA_LIBS)
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 8d5d7d2..520539c 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -41,9 +41,7 @@ libide/application/ide-application.c
 libide/application/ide-application-command-line.c
 libide/buffers/ide-buffer.c
 libide/buffers/ide-buffer-manager.c
-libide/buildsystem/ide-builder.c
 libide/buildsystem/ide-build-manager.c
-libide/buildsystem/ide-build-result.c
 libide/buildsystem/ide-build-system.c
 libide/buildsystem/ide-configuration-manager.c
 libide/devices/ide-device-manager.c
@@ -96,9 +94,7 @@ libide/workbench/ide-omni-bar.ui
 libide/workbench/ide-workbench-actions.c
 libide/workbench/ide-workbench.c
 libide/workbench/ide-workbench-header-bar.ui
-plugins/autotools/ide-autotools-builder.c
 plugins/autotools/ide-autotools-build-system.c
-plugins/autotools/ide-autotools-build-task.c
 plugins/autotools/ide-makecache.c
 plugins/autotools-templates/autotools_templates/__init__.py
 plugins/build-tools/gbp-build-configuration-row.ui
@@ -127,8 +123,6 @@ plugins/color-picker/gtk/menus.ui
 plugins/command-bar/gb-command-bar.c
 plugins/command-bar/gb-vim.c
 plugins/comment-code/gtk/menus.ui
-plugins/contributing/contributing_plugin/helper.py
-plugins/contributing/contributing_plugin/__init__.py
 plugins/c-pack/ide-c-format-provider.c
 plugins/create-project/gbp-create-project-genesis-addin.c
 plugins/create-project/gbp-create-project-tool.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index e62afa8..d26154b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -126,6 +126,12 @@ test_ide_builder_CFLAGS = $(tests_cflags)
 test_ide_builder_LDADD = $(tests_libs)
 
 
+TESTS += test-ide-build-pipeline
+test_ide_build_pipeline_SOURCES = test-ide-build-pipeline.c
+test_ide_build_pipeline_CFLAGS = $(tests_cflags)
+test_ide_build_pipeline_LDADD = $(tests_libs)
+
+
 TESTS += test-ide-doap
 test_ide_doap_SOURCES = test-ide-doap.c
 test_ide_doap_CFLAGS = $(tests_cflags)
diff --git a/tests/data/project1/.gitignore b/tests/data/project1/.gitignore
index 4852292..cbd86cc 100644
--- a/tests/data/project1/.gitignore
+++ b/tests/data/project1/.gitignore
@@ -15,4 +15,5 @@ build-aux/m4/lt~obsolete.m4
 build-aux/missing
 build/
 config.h.in
+config.h.in~
 configure
diff --git a/tests/test-ide-build-pipeline.c b/tests/test-ide-build-pipeline.c
new file mode 100644
index 0000000..fafa554
--- /dev/null
+++ b/tests/test-ide-build-pipeline.c
@@ -0,0 +1,117 @@
+/* test-ide-build-pipeline.c
+ *
+ * Copyright (C) 2016 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ide.h>
+
+#include "application/ide-application-tests.h"
+
+static void
+execute_cb (GObject      *object,
+            GAsyncResult *result,
+            gpointer      user_data)
+{
+  IdeBuildPipeline *pipeline = (IdeBuildPipeline *)object;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(GTask) task = user_data;
+  gint r;
+
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  r = ide_build_pipeline_execute_finish (pipeline, result, &error);
+  g_assert_no_error (error);
+  g_assert_cmpint (r, ==, TRUE);
+
+  g_task_return_boolean (task, TRUE);
+}
+
+static void
+context_loaded (GObject      *object,
+                GAsyncResult *result,
+                gpointer      user_data)
+{
+  g_autoptr(GTask) task = user_data;
+  g_autoptr(IdeContext) context = NULL;
+  g_autoptr(GError) error = NULL;
+  g_autoptr(IdeBuildPipeline) pipeline = NULL;
+  IdeConfigurationManager *config_manager;
+  IdeConfiguration *config;
+
+  context = ide_context_new_finish (result, &error);
+  g_assert_no_error (error);
+  g_assert (context != NULL);
+  g_assert (IDE_IS_CONTEXT (context));
+
+  config_manager = ide_context_get_configuration_manager (context);
+  g_assert (IDE_IS_CONFIGURATION_MANAGER (config_manager));
+
+  config = ide_configuration_manager_get_current (config_manager);
+  g_assert (IDE_IS_CONFIGURATION (config));
+
+  pipeline = g_object_new (IDE_TYPE_BUILD_PIPELINE,
+                           "context", context,
+                           "configuration", config,
+                           NULL);
+
+  ide_build_pipeline_request_phase (pipeline, IDE_BUILD_PHASE_BUILD);
+
+  ide_build_pipeline_execute_async (pipeline,
+                                    NULL,
+                                    execute_cb,
+                                    g_steal_pointer (&task));
+}
+
+static void
+test_build_pipeline (GCancellable        *cancellable,
+                     GAsyncReadyCallback  callback,
+                     gpointer             user_data)
+{
+  g_autoptr(GFile) project_file = NULL;
+  g_autofree gchar *path = NULL;
+  const gchar *srcdir = g_getenv ("G_TEST_SRCDIR");
+  g_autoptr(GTask) task = NULL;
+
+  task = g_task_new (NULL, cancellable, callback, user_data);
+
+  path = g_build_filename (srcdir, "data", "project1", NULL);
+  project_file = g_file_new_for_path (path);
+
+  ide_context_new_async (project_file,
+                         cancellable,
+                         context_loaded,
+                         g_steal_pointer (&task));
+}
+
+gint
+main (gint   argc,
+      gchar *argv[])
+{
+  IdeApplication *app;
+  gint ret;
+
+  g_test_init (&argc, &argv, NULL);
+
+  ide_log_init (TRUE, NULL);
+  ide_log_set_verbosity (4);
+
+  app = ide_application_new ();
+  ide_application_add_test (app, "/Ide/BuildPipeline/basic", test_build_pipeline, NULL);
+  ret = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+
+  return ret;
+}


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