Handle missing tag cache better

mopidy/backends/gstreamer.py

@@ -185,6 +185,7 @@ class GStreamerLibraryController(BaseLibraryController):
     def __init__(self, backend):
         super(GStreamerLibraryController, self).__init__(backend)
         self._uri_mapping = {}
+        self.refresh()
 
     def refresh(self, uri=None):
         tracks, artists, albums = parse_mpd_tag_cache(settings.TAG_CACHE,

mopidy/utils.py

@@ -140,12 +140,17 @@ def parse_mpd_tag_cache(tag_cache, music_dir=''):
     """
     Converts a MPD tag_cache into a lists of tracks, artists and albums.
     """
-    with open(tag_cache) as library:
-        contents = library.read()
-
     tracks = set()
     artists = set()
     albums = set()
+
+    try:
+        with open(tag_cache) as library:
+            contents = library.read()
+    except IOError, e:
+        logger.error('Could not tag cache: %s', e)
+        return tracks, artists, albums
+
     current = {}
     state = None
 

tests/backends/base.py

@@ -989,7 +989,6 @@ class BaseLibraryControllerTest(object):
     def setUp(self):
         self.backend = self.backend_class(mixer=DummyMixer())
         self.library = self.backend.library
-        self.library.refresh() # FIXME init should call refresh instead
 
     def tearDown(self):
         self.backend.destroy()