[gnome-build-meta] sdk/dconf: add patch for overriding dconf directory

[Jordan Petridis <jpetridis src gnome org>]

commit b9e2732077db1f84066cc04d870d152b30b95d56
Author: Abderrahim Kitouni <a kitouni gmail com>
Date:   Tue Sep 18 13:34:22 2018 +0100

    sdk/dconf: add patch for overriding dconf directory
    
    Should hopefully fix #58
    
    (Cherry-picked from 9bb2f49063f93829b38f769e892fc1a012b7e874)

 elements/sdk/dconf.bst           |  2 ++
 files/dconf/dconf-override.patch | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)
---
diff --git a/elements/sdk/dconf.bst b/elements/sdk/dconf.bst
index f631994..0fbf311 100644
--- a/elements/sdk/dconf.bst
+++ b/elements/sdk/dconf.bst
@@ -3,6 +3,8 @@ sources:
 - kind: git
   url: gitlab_gnome_org:GNOME/dconf
   track: master
+- kind: patch
+  path: files/dconf/dconf-override.patch
 depends:
 - sdk/glib.bst
 - filename: sdk/vala.bst
diff --git a/files/dconf/dconf-override.patch b/files/dconf/dconf-override.patch
new file mode 100644
index 0000000..0e95c22
--- /dev/null
+++ b/files/dconf/dconf-override.patch
@@ -0,0 +1,23 @@
+diff --git a/engine/dconf-engine-source-user.c b/engine/dconf-engine-source-user.c
+index 1657875..e4f8786 100644
+--- a/engine/dconf-engine-source-user.c
++++ b/engine/dconf-engine-source-user.c
+@@ -39,11 +39,17 @@ dconf_engine_source_user_open_gvdb (const gchar *name)
+ {
+   GvdbTable *table;
+   gchar *filename;
++  const gchar *override;
++
++  override = g_getenv ("DCONF_USER_CONFIG_DIR");
++  if (override == NULL)
++    filename = g_build_filename (g_get_user_config_dir (), "dconf", name, NULL);
++  else
++    filename = g_build_filename (g_get_home_dir (), override, name, NULL);
+ 
+   /* This can fail in the normal case of the user not having any
+    * settings.  That's OK and it shouldn't be considered as an error.
+    */
+-  filename = g_build_filename (g_get_user_config_dir (), "dconf", name, NULL);
+   table = gvdb_table_new (filename, FALSE, NULL);
+   g_free (filename);
+