lastgenre: invert 'force' option default value.

beetsplug/lastgenre/__init__.py

@@ -202,7 +202,7 @@ class LastGenrePlugin(plugins.BeetsPlugin):
             'fallback': None,
             'canonical': None,
             'source': 'album',
-            'force': False,
+            'force': True,
             'auto': True,
         })
 
@@ -315,6 +315,7 @@ class LastGenrePlugin(plugins.BeetsPlugin):
         lastgenre_cmd = ui.Subcommand('lastgenre', help='fetch genres')
         lastgenre_cmd.parser.add_option('-f', '--force', dest='force',
                               action='store_true',
+                              default=False,
                               help='re-download genre when already present')
         lastgenre_cmd.parser.add_option('-s', '--source', dest='source',
                               type='string',
@@ -347,9 +348,6 @@ class LastGenrePlugin(plugins.BeetsPlugin):
 
     def imported(self, session, task):
         """Event hook called when an import task finishes."""
-        # Always force a "real" lookup during import.
-        if not self.config['force']:
-            self.config['force'] = True
 
         if task.is_album:
             album = session.lib.get_album(task.album_id)

docs/plugins/lastgenre.rst

@@ -35,6 +35,9 @@ Wikipedia`_.
 .. _pylast: http://code.google.com/p/pylast/
 .. _script that scrapes Wikipedia: https://gist.github.com/1241307
 
+Switch ``force`` flag to False to keep the original genre when member 
+of the whitelist.
+
 If no genre is found, the file will be left unchanged. To instead specify a
 fallback genre, use the ``fallback`` configuration option. You can, of
 course, use the empty string as a fallback, like so::