[gnome-builder] build-panel: diagnostics color codes filtered

[Sébastien Lafargue <slafargue src gnome org>]

commit 7c39cf1e195642517ee7cbd66ac8ed4064fc4516
Author: Sebastien Lafargue <slafargue gnome org>
Date:   Tue Feb 14 22:03:40 2017 +0100

    build-panel: diagnostics color codes filtered
    
    We now filter from color codes the diagnostics emitted for the
    build panel otherwise they do not appear in the panel.

 libide/Makefile.am                      |    2 +
 libide/buildsystem/ide-build-pipeline.c |    8 ++-
 libide/buildsystem/ide-build-utils.c    |  141 +++++++++++++++++++++++++++++++
 libide/buildsystem/ide-build-utils.h    |   30 +++++++
 4 files changed, 179 insertions(+), 2 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index 723ca68..50b944d 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -42,6 +42,7 @@ libide_1_0_la_public_headers =                            \
        buildsystem/ide-build-stage-transfer.h            \
        buildsystem/ide-build-system.h                    \
        buildsystem/ide-build-target.h                    \
+       buildsystem/ide-build-utils.h                     \
        buildsystem/ide-configuration-manager.h           \
        buildsystem/ide-configuration.h                   \
        buildsystem/ide-configuration-provider.h          \
@@ -215,6 +216,7 @@ libide_1_0_la_public_sources =                            \
        buildsystem/ide-build-stage-transfer.c            \
        buildsystem/ide-build-system.c                    \
        buildsystem/ide-build-target.c                    \
+       buildsystem/ide-build-utils.c                     \
        buildsystem/ide-configuration-manager.c           \
        buildsystem/ide-configuration.c                   \
        buildsystem/ide-configuration-provider.c          \
diff --git a/libide/buildsystem/ide-build-pipeline.c b/libide/buildsystem/ide-build-pipeline.c
index 0153918..fa4f947 100644
--- a/libide/buildsystem/ide-build-pipeline.c
+++ b/libide/buildsystem/ide-build-pipeline.c
@@ -37,6 +37,7 @@
 #include "buildsystem/ide-build-stage-launcher.h"
 #include "buildsystem/ide-build-stage-private.h"
 #include "buildsystem/ide-build-system.h"
+#include "buildsystem/ide-build-utils.h"
 #include "diagnostics/ide-diagnostic.h"
 #include "diagnostics/ide-source-location.h"
 #include "diagnostics/ide-source-range.h"
@@ -464,6 +465,7 @@ ide_build_pipeline_log_observer (IdeBuildLogStream  stream,
 {
   IdeBuildPipeline *self = user_data;
   const gchar *enterdir;
+  g_autofree gchar *filtered_message = NULL;
 
   g_assert (stream == IDE_BUILD_LOG_STDOUT || stream == IDE_BUILD_LOG_STDERR);
   g_assert (IDE_IS_BUILD_PIPELINE (self));
@@ -478,12 +480,14 @@ ide_build_pipeline_log_observer (IdeBuildLogStream  stream,
   if (self->log != NULL)
     ide_build_log_observer (stream, message, message_len, self->log);
 
+  filtered_message = ide_build_utils_color_codes_filtering (message);
+
   /*
    * 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)) &&
+  if (NULL != (enterdir = strstr (filtered_message, ENTERING_DIRECTORY_BEGIN)) &&
       g_str_has_suffix (enterdir, ENTERING_DIRECTORY_END))
     {
       gssize len;
@@ -507,7 +511,7 @@ ide_build_pipeline_log_observer (IdeBuildLogStream  stream,
       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))
+      if (g_regex_match (errfmt->regex, filtered_message, 0, &match_info))
         {
           g_autoptr(IdeDiagnostic) diagnostic = create_diagnostic (self, match_info);
 
diff --git a/libide/buildsystem/ide-build-utils.c b/libide/buildsystem/ide-build-utils.c
new file mode 100644
index 0000000..356f950
--- /dev/null
+++ b/libide/buildsystem/ide-build-utils.c
@@ -0,0 +1,141 @@
+/* ide-build-utils.c
+ *
+ * Copyright (C) 2017 Sebastien Lafargue <slafargue gnome org>
+ *
+ * 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 "ide-build-utils.h"
+
+static void
+skip_color_codes_values (const gchar **cursor)
+{
+  g_assert (cursor != NULL && *cursor != NULL);
+
+  if (**cursor == 'm')
+    {
+      ++(*cursor);
+      return;
+    }
+
+  while (**cursor != '\0')
+    {
+      while (**cursor >= '0' && **cursor <= '9')
+        ++(*cursor);
+
+      if (**cursor == ';')
+        {
+          ++(*cursor);
+          continue;
+        }
+
+      if (**cursor == 'm')
+        {
+          ++(*cursor);
+          break;
+        }
+    }
+}
+
+static gboolean
+find_color_code (const gchar  *txt,
+                 const gchar **start_offset,
+                 const gchar **end_offset)
+{
+  const gchar *cursor = txt;
+
+  g_assert (!ide_str_empty0 (txt));
+  g_assert (start_offset != NULL);
+  g_assert (end_offset != NULL);
+
+  while (*cursor != '\0')
+    {
+      if (*cursor == '\\' && *(cursor + 1) == 'e')
+        {
+          *start_offset = cursor;
+          cursor += 2;
+        }
+      else if (*cursor == '\033' || *cursor == '\x01b')
+        {
+          *start_offset = cursor;
+          ++cursor;
+        }
+      else
+        goto next;
+
+      if (*cursor == '[')
+        {
+          ++cursor;
+          if (*cursor == '\0')
+            goto end;
+
+          if (*cursor == 'K')
+            {
+              *end_offset = cursor + 1;
+              return TRUE;
+            }
+
+          skip_color_codes_values (&cursor);
+          *end_offset = cursor;
+
+          return TRUE;
+        }
+
+      if (*cursor == '\0')
+        goto end;
+
+next:
+      /* TODO: skip a possible escaped char */
+      cursor = g_utf8_next_char (cursor);
+    }
+
+end:
+  *start_offset = *end_offset = cursor;
+  return FALSE;
+}
+
+gchar *
+ide_build_utils_color_codes_filtering (const gchar *txt)
+{
+  const gchar *cursor = txt;
+  const gchar *start_offset;
+  const gchar *end_offset;
+  GString *string;
+  gsize len;
+  gboolean ret;
+
+  g_assert (txt != NULL);
+
+  if (*txt == '\0')
+    return g_strdup ("\0");
+
+  string = g_string_new (NULL);
+
+  while (*cursor != '\0')
+    {
+      ret = find_color_code (cursor, &start_offset, &end_offset);
+      len = start_offset - cursor;
+      if (len > 0)
+        g_string_append_len (string, cursor, len);
+
+      if (!ret)
+        break;
+
+      cursor = end_offset;
+    }
+
+  return g_string_free (string, FALSE);
+}
diff --git a/libide/buildsystem/ide-build-utils.h b/libide/buildsystem/ide-build-utils.h
new file mode 100644
index 0000000..3db5dda
--- /dev/null
+++ b/libide/buildsystem/ide-build-utils.h
@@ -0,0 +1,30 @@
+/* ide-build-utils.h
+ *
+ * Copyright (C) 2017 Sebastien Lafargue <slafargue gnome org>
+ *
+ * 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_UTILS_H
+#define IDE_BUILD_UTILS_H
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+gchar *ide_build_utils_color_codes_filtering (const gchar *txt);
+
+G_END_DECLS
+
+#endif /* IDE_BUILD_UTILS_H */