Update beets to 1.3.18:

Dependencies:
* PyYAML 3.11
* Unidecode 0.4.19
* beets 1.3.18
* colorama 0.3.7
* enum34 1.1.6
* jellyfish 0.5.4
* munkres 1.0.7
* musicbrainzngs 0.6
* mutagen 1.32

libs/beetsplug/permissions.py

@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import division, absolute_import, print_function
+
+"""Fixes file permissions after the file gets written on import. Put something
+like the following in your config.yaml to configure:
+
+    permissions:
+            file: 644
+            dir: 755
+"""
+import os
+from beets import config, util
+from beets.plugins import BeetsPlugin
+from beets.util import ancestry
+
+
+def convert_perm(perm):
+    """If the perm is a int it will first convert it to a string and back
+    to an oct int. Else it just converts it to oct.
+    """
+    if isinstance(perm, int):
+        return int(bytes(perm), 8)
+    else:
+        return int(perm, 8)
+
+
+def check_permissions(path, permission):
+    """Checks the permissions of a path.
+    """
+    return oct(os.stat(path).st_mode & 0o777) == oct(permission)
+
+
+def dirs_in_library(library, item):
+    """Creates a list of ancestor directories in the beets library path.
+    """
+    return [ancestor
+            for ancestor in ancestry(item)
+            if ancestor.startswith(library)][1:]
+
+
+class Permissions(BeetsPlugin):
+    def __init__(self):
+        super(Permissions, self).__init__()
+
+        # Adding defaults.
+        self.config.add({
+            u'file': 644,
+            u'dir': 755
+        })
+
+        self.register_listener('item_imported', permissions)
+        self.register_listener('album_imported', permissions)
+
+
+def permissions(lib, item=None, album=None):
+    """Running the permission fixer.
+    """
+    # Getting the config.
+    file_perm = config['permissions']['file'].get()
+    dir_perm = config['permissions']['dir'].get()
+
+    # Converts permissions to oct.
+    file_perm = convert_perm(file_perm)
+    dir_perm = convert_perm(dir_perm)
+
+    # Create chmod_queue.
+    file_chmod_queue = []
+    if item:
+        file_chmod_queue.append(item.path)
+    elif album:
+        for album_item in album.items():
+            file_chmod_queue.append(album_item.path)
+
+    # A set of directories to change permissions for.
+    dir_chmod_queue = set()
+
+    for path in file_chmod_queue:
+        # Changing permissions on the destination file.
+        os.chmod(util.bytestring_path(path), file_perm)
+
+        # Checks if the destination path has the permissions configured.
+        if not check_permissions(util.bytestring_path(path), file_perm):
+            message = u'There was a problem setting permission on {}'.format(
+                path)
+            print(message)
+
+        # Adding directories to the directory chmod queue.
+        dir_chmod_queue.update(
+            dirs_in_library(lib.directory,
+                            path))
+
+    # Change permissions for the directories.
+    for path in dir_chmod_queue:
+        # Chaning permissions on the destination directory.
+        os.chmod(util.bytestring_path(path), dir_perm)
+
+        # Checks if the destination path has the permissions configured.
+        if not check_permissions(util.bytestring_path(path), dir_perm):
+            message = u'There was a problem setting permission on {}'.format(
+                path)
+            print(message)