mopidy/mopidy — pull request #747 by jodal (2014-06-19 22:28:18+00:00)
Title: local: Add friendly help if no local library cache found

Fixes #711

Example output before:

```
INFO Loaded 0 local playlists from /home/jodal/.local/share/mopidy/local/playlists
WARNING Loading JSON local library failed: [Errno 2] No such file or directory:
'/home/jodal/.local/share/mopidy/local/library.json.gz'
INFO Loaded 0 local tracks using json
```

Example output now:

```
INFO Loaded 0 local playlists from /home/jodal/.local/share/mopidy/local/playlists
INFO No local library metadata cache found at
/home/jodal/.local/share/mopidy/local/library.json.gz. Please run `mopidy local scan` to
index your local music library. If you do not have a local music collection, you can disable
the local backend to hide this message.
INFO Loaded 0 local tracks using json
```