Enable import of incomplete albums

This commit disables the autoreject for incomplete albums. There is
several one-liner fixes in autotag/__init__.py and importer.py, as well
as some UI additions to report to the user when a track seems missing.

beets/autotag/__init__.py

@@ -74,6 +74,8 @@ def apply_metadata(items, album_info):
     """
     for index, (item, track_info) in enumerate(zip(items, album_info.tracks)):
         # Album, artist, track count.
+        if not item:
+            continue
         if track_info.artist:
             item.artist = track_info.artist
         else:

beets/autotag/match.py

@@ -365,7 +365,7 @@ def validate_candidate(items, tuple_dict, info):
         return
 
     # Make sure the album has the correct number of tracks.
-    if len(items) != len(info.tracks):
+    if len(items) > len(info.tracks):
         log.debug('Track count mismatch.')
         return
 

beets/importer.py

@@ -107,7 +107,7 @@ def _duplicate_check(lib, task, recent=None):
         recent.add((artist, album))
 
     # Look in the library.
-    cur_paths = set(i.path for i in task.items)
+    cur_paths = set(i.path for i in task.items if i)
     for album_cand in lib.albums(artist=artist):
         if album_cand.album == album:
             # Check whether the album is identical in contents, in which
@@ -591,7 +591,7 @@ def apply_choices(config):
         if task.should_skip():
             continue
 
-        items = task.items if task.is_album else [task.item]
+        items = [i for i in task.items if i] if task.is_album else [task.item]
         # Clear IDs in case the items are being re-tagged.
         for item in items:
             item.id = None
@@ -644,7 +644,7 @@ def apply_choices(config):
             # Add new ones.
             if task.is_album:
                 # Add an album.
-                album = lib.add_album(task.items)
+                album = lib.add_album([i for i in task.items if i])
                 task.album_id = album.id
             else:
                 # Add tracks.

beets/ui/commands.py

@@ -154,7 +154,11 @@ def show_change(cur_artist, cur_album, items, info, dist, color=True):
     print_('(Similarity: %s)' % dist_string(dist, color))
 
     # Tracks.
+    missing_tracks = []
     for i, (item, track_info) in enumerate(zip(items, info.tracks)):
+        if not item:
+            missing_tracks.append((i, track_info))
+            continue
         cur_track = unicode(item.track)
         new_track = unicode(i+1)
         cur_title = item.title
@@ -179,6 +183,9 @@ def show_change(cur_artist, cur_album, items, info, dist, color=True):
             print_(u" * %s -> %s" % (cur_title, new_title))
         elif cur_track != new_track:
             print_(u" * %s (%s -> %s)" % (item.title, cur_track, new_track))
+    for i, track_info in missing_tracks:
+        print_(ui.colorize('red', u' * Missing track:  %s (%d)' % \
+                           (track_info.title, i+1)))
 
 def show_item_change(item, info, dist, color):
     """Print out the change that would occur by tagging `item` with the