local: Define extension

mopidy/backends/local/__init__.py

@@ -1,4 +1,10 @@
-"""A backend for playing music from a local music archive.
+from __future__ import unicode_literals
+
+import mopidy
+from mopidy import ext
+
+
+__doc__ = """A backend for playing music from a local music archive.
 
 This backend handles URIs starting with ``file:``.
 
@@ -20,7 +26,24 @@ https://github.com/mopidy/mopidy/issues?labels=Local+backend
 - :attr:`mopidy.settings.LOCAL_TAG_CACHE_FILE`
 """
 
-from __future__ import unicode_literals
 
-# flake8: noqa
+# TODO Move import into method when BACKENDS setting is removed
 from .actor import LocalBackend
+
+
+class Extension(ext.Extension):
+
+    name = 'Mopidy-Local'
+    version = mopidy.__version__
+
+    def get_default_config(self):
+        return '[local]'
+
+    def validate_config(self, config):
+        pass
+
+    def validate_environment(self):
+        pass
+
+    def get_backend_classes(self):
+        return [LocalBackend]

setup.py

@@ -45,6 +45,7 @@ setup(
             'mopidy-scan = mopidy.scanner:main',
         ],
         b'mopidy.extension': [
+            'local = mopidy.backends.local:Extension',
             'spotify = mopidy.backends.spotify:Extension',
         ],
     },