ext: Add get_command and mopidy.backends.base.Command

mopidy/backends/base.py

@@ -2,6 +2,8 @@ from __future__ import unicode_literals
 
 import copy
 
+from mopidy.utils import command
+
 
 class Backend(object):
     #: Actor proxy to an instance of :class:`mopidy.audio.Audio`.
@@ -281,6 +283,12 @@ class BasePlaylistsProvider(object):
         raise NotImplementedError
 
 
+# Re-exporting from this location for backends.
+class Command(command.Command):
+    pass
+
+
+# TODO: remove
 class BaseSubCommandProvider(object):
     """Sub-classes may optionally add arguments to the passed in parser.
 

mopidy/ext.py

@@ -87,14 +87,18 @@ class Extension(object):
         """
         return []
 
-    def get_sub_commands(self):
-        """List of sub-command classes
-
-        :returns: list of
-          :class:`~mopidy.backends.base.BaseSubCommandProvider` subclasses
-        """
+    def get_sub_commads(self):
+        # TODO: remove
         return []
 
+    def get_command(self):
+        """Command to expose to command line users running mopidy.
+
+        :returns:
+          :class:`~mopidy.backends.base.Command` instance
+        """
+        pass
+
     def register_gstreamer_elements(self):
         """Hook for registering custom GStreamer elements