[gnome-shell] Error out at startup if the GConf schemas are missing

[Dan Winship <danw src gnome org>]

commit 20d3b1f8b18507cd8644ed98ff06659d04eb2c84
Author: Dan Winship <danw gnome org>
Date:   Tue Mar 2 13:51:00 2010 -0500

    Error out at startup if the GConf schemas are missing
    
    If we don't do this, then boolean/int/list keys will seem to sort of
    work (but defaulting to false/0/[] instead of the correct schema
    defaults), but string keys will return null, which will usually cause
    exceptions or crashes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=611214

 src/shell-gconf.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/src/shell-gconf.c b/src/shell-gconf.c
index 7073bbd..30485d4 100644
--- a/src/shell-gconf.c
+++ b/src/shell-gconf.c
@@ -46,9 +46,21 @@ static void gconf_value_changed (GConfClient *client, const char *key,
 static void
 shell_gconf_init (ShellGConf *gconf)
 {
+  GConfValue *val;
+
   gconf->client = gconf_client_get_default ();
   gconf_client_add_dir (gconf->client, SHELL_GCONF_DIR,
                         GCONF_CLIENT_PRELOAD_RECURSIVE, NULL);
+
+  val = gconf_client_get (gconf->client,
+                          SHELL_GCONF_DIR "/development_tools", NULL);
+  if (!val)
+    {
+      g_error ("GNOME Shell GConf schemas not found.\n"
+               "This generally indicates a building or packaging problem.");
+    }
+  gconf_value_free (val);
+
   g_signal_connect (gconf->client, "value_changed",
                     G_CALLBACK (gconf_value_changed), gconf);
 }