[folks] core: Don’t warn if a D-Bus service is mi ssing

[Philip Withnall <pwithnall src gnome org>]

commit eac52ef741bade059d077bd149889accb40ab2af
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Thu Jan 30 07:49:29 2014 +0000

    core: Don’t warn if a D-Bus service is missing
    
    If a backend fails to start because a D-Bus service is missing, don’t
    spew a warning into stderr. It probably means that the user is running
    folks from git and has more development packages installed than services
    running. Or it means that a distro packager has built too many backends
    by default, rather than packaging them up separately and adding
    dependencies on the relevant D-Bus packages.
    
    In any case, it’s irrelevant, unnecessary debug spew.

 folks/backend-store.vala |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/folks/backend-store.vala b/folks/backend-store.vala
index 0f47236..4af4d20 100644
--- a/folks/backend-store.vala
+++ b/folks/backend-store.vala
@@ -406,8 +406,20 @@ public class Folks.BackendStore : Object {
                 }
               catch (GLib.Error e)
                 {
-                  warning ("Error preparing Backend '%s': %s",
-                      backend.name, e.message);
+                  if (e is DBusError.SERVICE_UNKNOWN)
+                    {
+                      /* Don’t warn if a D-Bus service is unknown; it probably
+                       * means the backend is deliberately not running and the
+                       * user is running folks from git, so hasn’t appropriately
+                       * enabled/disabled backends from building. */
+                      debug ("Error preparing Backend '%s': %s",
+                          backend.name, e.message);
+                    }
+                  else
+                    {
+                      warning ("Error preparing Backend '%s': %s",
+                          backend.name, e.message);
+                    }
                 }
             }
         }