[gnome-builder/wip/tintou/context-notify] context: notify when the vcs and build system are guessed

[Corentin Noël <corentinnoel src gnome org>]

commit 35bf6fdb6e4af736221a5534b5691a1b4d7690a8
Author: Corentin Noël <corentin noel collabora co uk>
Date:   Mon Feb 5 16:53:59 2018 +0000

    context: notify when the vcs and build system are guessed

 src/libide/ide-context.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/libide/ide-context.c b/src/libide/ide-context.c
index b22687f61..a7969e601 100644
--- a/src/libide/ide-context.c
+++ b/src/libide/ide-context.c
@@ -1016,7 +1016,8 @@ ide_context_init_vcs_cb (GObject      *object,
       return;
     }
 
-  self->vcs = g_object_ref (vcs);
+  if (g_set_object (&self->vcs, vcs))
+    g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_VCS]);
 
   g_task_return_boolean (task, TRUE);
 }
@@ -1067,7 +1068,8 @@ ide_context_init_build_system_cb (GObject      *object,
       IDE_EXIT;
     }
 
-  self->build_system = g_object_ref (build_system);
+  if (g_set_object (&self->build_system, build_system))
+    g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUILD_SYSTEM]);
 
   /* allow the build system to override the project file */
   g_object_get (self->build_system,