Add option to force forward slashes in paths

beets/util/__init__.py

@@ -223,6 +223,13 @@ def sorted_walk(path, ignore=(), ignore_hidden=False, logger=None):
             yield res
 
 
+def path_as_posix(path):
+    """Return the string representation of the path with forward (/)
+    slashes.
+    """
+    return path.replace(b'\\', b'/')
+
+
 def mkdirall(path):
     """Make all the enclosing directories of path (like mkdir -p on the
     parent).

beetsplug/playlist.py

@@ -18,6 +18,7 @@
 import fnmatch
 import tempfile
 import beets
+from beets.util import path_as_posix
 
 
 class PlaylistQuery(beets.dbcore.Query):
@@ -86,6 +87,7 @@ def __init__(self):
             'auto': False,
             'playlist_dir': '.',
             'relative_to': 'library',
+            'forward_slash': False,
         })
 
         self.playlist_dir = self.config['playlist_dir'].as_filename()
@@ -160,6 +162,8 @@ def update_playlist(self, filename, base_dir):
                     try:
                         new_path = self.changes[beets.util.normpath(lookup)]
                     except KeyError:
+                        if self.config['forward_slash']:
+                            line = path_as_posix(line)
                         tempfp.write(line)
                     else:
                         if new_path is None:
@@ -170,8 +174,10 @@ def update_playlist(self, filename, base_dir):
                         changes += 1
                         if is_relative:
                             new_path = os.path.relpath(new_path, base_dir)
-
-                        tempfp.write(line.replace(original_path, new_path))
+                        line = line.replace(original_path, new_path)
+                        if self.config['forward_slash']:
+                            line = path_as_posix(line)
+                        tempfp.write(line)
 
         if changes or deletions:
             self._log.info(

beetsplug/smartplaylist.py

@@ -21,7 +21,7 @@
 from beets.plugins import BeetsPlugin
 from beets import ui
 from beets.util import (mkdirall, normpath, sanitize_path, syspath,
-                        bytestring_path)
+                        bytestring_path, path_as_posix)
 from beets.library import Item, Album, parse_query_string
 from beets.dbcore import OrQuery
 from beets.dbcore.query import MultipleSort, ParsingError
@@ -37,7 +37,8 @@ def __init__(self):
             'relative_to': None,
             'playlist_dir': u'.',
             'auto': True,
-            'playlists': []
+            'playlists': [],
+            'forward_slash': False,
         })
 
         self._matched_playlists = None
@@ -206,6 +207,8 @@ def update_playlists(self, lib):
             mkdirall(m3u_path)
             with open(syspath(m3u_path), 'wb') as f:
                 for path in m3us[m3u]:
+                    if self.config['forward_slash'].get():
+                        path = path_as_posix(path)
                     f.write(path + b'\n')
 
         self._log.info(u"{0} playlists updated", len(self._matched_playlists))

docs/plugins/playlist.rst

@@ -11,6 +11,7 @@ Then configure your playlists like this::
         auto: no
         relative_to: ~/Music
         playlist_dir: ~/.mpd/playlists
+        forward_slash: no
 
 It is possible to query the library based on a playlist by speicifying its
 absolute path::
@@ -45,3 +46,7 @@ other configuration options are:
   set it to ``playlist`` to use the playlist's parent directory or to
   ``library`` to use the library directory.
   Default: ``library``
+- **forward_slah**: Forces forward slashes in the generated playlist files.
+  If you intend to use this plugin to generate playlists for MPD on
+  Windows, set this to yes.
+  Default: Use system separator.

docs/plugins/smartplaylist.rst

@@ -14,6 +14,7 @@ Then configure your smart playlists like the following example::
     smartplaylist:
         relative_to: ~/Music
         playlist_dir: ~/.mpd/playlists
+        forward_slah: no
         playlists:
             - name: all.m3u
               query: ''
@@ -96,3 +97,7 @@ other configuration options are:
   directory. If you intend to use this plugin to generate playlists for MPD,
   point this to your MPD music directory.
   Default: Use absolute paths.
+- **forward_slah**: Forces forward slashes in the generated playlist files.
+  If you intend to use this plugin to generate playlists for MPD on
+  Windows, set this to yes.
+  Default: Use system separator.

test/test_files.py

@@ -195,6 +195,11 @@ def test_components_works_on_relative(self):
         a = ['a', 'b', 'c']
         self.assertEqual(util.components(p), a)
 
+    def test_forward_slash(self):
+        p = br'C:\a\b\c'
+        a = br'C:/a/b/c'
+        self.assertEqual(util.path_as_posix(p), a)
+
 
 class AlbumFileTest(_common.TestCase):
     def setUp(self):