[gnome-music/gnome-3-10] Exit gracefully if we can't connect to tracker

[Vadim Rutkovsky <vrutkovsky src gnome org>]

commit e52c2dbc5981a3d21f49ed7b3ce5af50ab3fba07
Author: Vadim Rutkovsky <vrutkovs redhat com>
Date:   Thu Apr 17 13:21:23 2014 +0200

    Exit gracefully if we can't connect to tracker
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724112

 gnomemusic/view.py    |    8 +++++++-
 gnomemusic/widgets.py |    8 +++++++-
 gnomemusic/window.py  |    7 ++++++-
 3 files changed, 20 insertions(+), 3 deletions(-)
---
diff --git a/gnomemusic/view.py b/gnomemusic/view.py
index 4652dcc..8a80478 100644
--- a/gnomemusic/view.py
+++ b/gnomemusic/view.py
@@ -45,7 +45,13 @@ from gnomemusic.grilo import grilo
 import gnomemusic.widgets as Widgets
 from gnomemusic.query import Query
 from gnomemusic.albumArtCache import AlbumArtCache as albumArtCache
-tracker = Tracker.SparqlConnection.get(None)
+
+try:
+    tracker = Tracker.SparqlConnection.get(None)
+except Exception as e:
+    from sys import exit
+    print("Cannot connect to tracker, error '%s'\Exiting" % str(e))
+    exit(1)
 
 if Gtk.get_minor_version() > 8:
     from gi.repository.Gtk import Stack, StackTransitionType
diff --git a/gnomemusic/widgets.py b/gnomemusic/widgets.py
index 9890e90..42aaad2 100644
--- a/gnomemusic/widgets.py
+++ b/gnomemusic/widgets.py
@@ -40,7 +40,13 @@ from gnomemusic.grilo import grilo
 from gnomemusic.query import Query
 from gnomemusic.albumArtCache import AlbumArtCache
 
-tracker = Tracker.SparqlConnection.get(None)
+try:
+    tracker = Tracker.SparqlConnection.get(None)
+except Exception as e:
+    from sys import exit
+    print("Cannot connect to tracker, error '%s'\Exiting" % str(e))
+    exit(1)
+
 ALBUM_ART_CACHE = AlbumArtCache.get_default()
 if Gtk.Widget.get_default_direction() is not Gtk.TextDirection.RTL:
     NOW_PLAYING_ICON_NAME = 'media-playback-start-symbolic'
diff --git a/gnomemusic/window.py b/gnomemusic/window.py
index 2aa4a67..a75d0c2 100644
--- a/gnomemusic/window.py
+++ b/gnomemusic/window.py
@@ -38,7 +38,12 @@ from gnomemusic.player import Player, SelectionToolbar
 from gnomemusic.query import Query
 import gnomemusic.view as Views
 
-tracker = Tracker.SparqlConnection.get(None)
+try:
+    tracker = Tracker.SparqlConnection.get(None)
+except Exception as e:
+    from sys import exit
+    print("Cannot connect to tracker, error '%s'\Exiting" % str(e))
+    exit(1)
 
 if Gtk.get_minor_version() > 8:
     from gi.repository.Gtk import Stack, StackTransitionType