[gnome-builder] ctags: put ctags files in project cache dir

[Christian Hergert <chergert src gnome org>]

commit 473066932d81f7f112e1ccdb0ab3e905e2dc1088
Author: Christian Hergert <chergert redhat com>
Date:   Tue Nov 21 00:08:13 2017 -0800

    ctags: put ctags files in project cache dir
    
    This uses the cache dir for the project so that reaping files
    at purge time is simpler.

 src/plugins/ctags/ide-ctags-builder.c |   18 ++++++------------
 src/plugins/ctags/ide-ctags-service.c |   10 ++--------
 2 files changed, 8 insertions(+), 20 deletions(-)
---
diff --git a/src/plugins/ctags/ide-ctags-builder.c b/src/plugins/ctags/ide-ctags-builder.c
index add7f49..f393546 100644
--- a/src/plugins/ctags/ide-ctags-builder.c
+++ b/src/plugins/ctags/ide-ctags-builder.c
@@ -289,7 +289,6 @@ ide_ctags_builder_build_async (IdeTagsBuilder      *builder,
   g_autofree gchar *relative_path = NULL;
   BuildTaskData *task_data;
   IdeContext *context;
-  const gchar *project_id;
   GFile *workdir;
 
   IDE_ENTRY;
@@ -305,26 +304,21 @@ ide_ctags_builder_build_async (IdeTagsBuilder      *builder,
   task_data->recursive = recursive;
 
   /*
-   * The destination directory for the tags should match the hierarchy
-   * of the projects source tree, but be based in something like
-   * ~/.cache/gnome-builder/tags/$project_id/ so that they can be reused
-   * even between configuration changes. Primarily, we want to avoid
+   * The destination directory for the tags should match the hierarchy of the
+   * projects source tree, but be based in something like
+   * ~/.cache/gnome-builder/projects/$project_id/ctags/ so that they can be
+   * reused even between configuration changes. Primarily, we want to avoid
    * putting things in the source tree.
    */
   context = ide_object_get_context (IDE_OBJECT (self));
-  project_id = ide_project_get_id (ide_context_get_project (context));
   workdir = ide_vcs_get_working_directory (ide_context_get_vcs (context));
   relative_path = g_file_get_relative_path (workdir, directory_or_file);
-  destination_path = g_build_filename (g_get_user_cache_dir (),
-                                       ide_get_program_name (),
-                                       "tags",
-                                       project_id,
-                                       relative_path,
-                                       NULL);
+  destination_path = ide_context_cache_filename (context, "ctags", relative_path, NULL);
   task_data->destination = g_file_new_for_path (destination_path);
 
   task = g_task_new (self, cancellable, callback, user_data);
   g_task_set_source_tag (task, ide_ctags_builder_build_async);
+  g_task_set_priority (task, G_PRIORITY_LOW);
   g_task_set_task_data (task, task_data, build_task_data_free);
   ide_thread_pool_push_task (IDE_THREAD_POOL_INDEXER, task, ide_ctags_builder_build_worker);
 
diff --git a/src/plugins/ctags/ide-ctags-service.c b/src/plugins/ctags/ide-ctags-service.c
index a5e590c..30b6c87 100644
--- a/src/plugins/ctags/ide-ctags-service.c
+++ b/src/plugins/ctags/ide-ctags-service.c
@@ -384,7 +384,6 @@ ide_ctags_service_do_mine (gpointer data)
   g_autoptr(GArray) mine_info = NULL;
   g_autofree gchar *path = NULL;
   IdeContext *context;
-  IdeProject *project;
   MineInfo info;
   GFile *workdir;
 
@@ -396,18 +395,13 @@ ide_ctags_service_do_mine (gpointer data)
   self->miner_active = TRUE;
 
   context = ide_object_get_context (IDE_OBJECT (self));
-  project = ide_context_get_project (context);
   workdir = ide_vcs_get_working_directory (ide_context_get_vcs (context));
 
   mine_info = g_array_new (FALSE, FALSE, sizeof (MineInfo));
   g_array_set_clear_func (mine_info, clear_mine_info);
 
-  /* mine: ~/.cache/gnome-builder/tags/$project_id */
-  info.path = g_build_filename (g_get_user_cache_dir (),
-                                ide_get_program_name (),
-                                "tags",
-                                ide_project_get_id (project),
-                                NULL);
+  /* mine: ~/.cache/gnome-builder/projects/$project_id/ctags/ */
+  info.path = ide_context_cache_filename (context, "ctags", NULL);
   info.recursive = TRUE;
   g_array_append_val (mine_info, info);