Add bracket argument to aunique

beets/library.py

@@ -1447,13 +1447,15 @@ def tmpl_time(s, fmt):
         cur_fmt = beets.config['time_format'].as_str()
         return time.strftime(fmt, time.strptime(s, cur_fmt))
 
-    def tmpl_aunique(self, keys=None, disam=None):
+    def tmpl_aunique(self, keys=None, disam=None, bracket=None):
         """Generate a string that is guaranteed to be unique among all
         albums in the library who share the same set of keys. A fields
         from "disam" is used in the string if one is sufficient to
         disambiguate the albums. Otherwise, a fallback opaque value is
         used. Both "keys" and "disam" should be given as
-        whitespace-separated lists of field names.
+        whitespace-separated lists of field names, while "bracket" is a
+        pair of characters to be used as brackets surrounding the
+        disambiguator or empty to have no brackets.
         """
         # Fast paths: no album, no item or library, or memoized value.
         if not self.item or not self.lib:
@@ -1467,9 +1469,20 @@ def tmpl_aunique(self, keys=None, disam=None):
 
         keys = keys or 'albumartist album'
         disam = disam or 'albumtype year label catalognum albumdisambig'
+        if bracket is None:
+            bracket = '[]'
         keys = keys.split()
         disam = disam.split()
 
+        # Assign a left and right bracket or leave blank if argument is empty.
+        if len(bracket) == 2:
+            bracket = list(bracket)
+            bracket_l = bracket[0]
+            bracket_r = bracket[1]
+        else:
+            bracket_l = u''
+            bracket_r = u''
+
         album = self.lib.get_album(self.item)
         if not album:
             # Do nothing for singletons.
@@ -1502,13 +1515,19 @@ def tmpl_aunique(self, keys=None, disam=None):
 
         else:
             # No disambiguator distinguished all fields.
-            res = u' {0}'.format(album.id)
+            res = u' {1}{0}{2}'.format(album.id, bracket_l, bracket_r)
             self.lib._memotable[memokey] = res
             return res
 
         # Flatten disambiguation value into a string.
         disam_value = album.formatted(True).get(disambiguator)
-        res = u' [{0}]'.format(disam_value)
+
+        # Return empty string if disambiguator is empty.
+        if disam_value:
+            res = u' {1}{0}{2}'.format(disam_value, bracket_l, bracket_r)
+        else:
+            res = u''
+
         self.lib._memotable[memokey] = res
         return res
 

docs/changelog.rst

@@ -17,6 +17,11 @@ New features:
   return the item info for the file at the given path, or 404.
 * The :doc:`/plugins/web` also has a new config option, ``include_paths``,
   which will cause paths to be included in item API responses if set to true.
+* The ``%aunique`` template function for :ref:`aunique` now takes a third
+  argument that specifies which brackets to use around the  disambiguator
+  value.  The argument can be any two characters that represent the left and
+  right brackets. It defaults to `[]` and can also be blank to turn off
+  bracketing. :bug:`2397` :bug:`2399`
 
 Fixes:
 

docs/reference/pathformat.rst

@@ -71,8 +71,8 @@ These functions are built in to beets:
   For example, "café" becomes "cafe". Uses the mapping provided by the
   `unidecode module`_. See the :ref:`asciify-paths` configuration
   option.
-* ``%aunique{identifiers,disambiguators}``: Provides a unique string to
-  disambiguate similar albums in the database. See :ref:`aunique`, below.
+* ``%aunique{identifiers,disambiguators,brackets}``: Provides a unique string
+  to disambiguate similar albums in the database. See :ref:`aunique`, below.
 * ``%time{date_time,format}``: Return the date and time in any format accepted
   by `strftime`_. For example, to get the year some music was added to your
   library, use ``%time{$added,%Y}``.
@@ -112,21 +112,27 @@ will expand to "[2008]" for one album and "[2010]" for the other. The
 function detects that you have two albums with the same artist and title but
 that they have different release years.
 
-For full flexibility, the ``%aunique`` function takes two arguments, each of
-which are whitespace-separated lists of album field names: a set of
-*identifiers* and a set of *disambiguators*. Any group of albums with identical
-values for all the identifiers will be considered "duplicates". Then, the
-function tries each disambiguator field, looking for one that distinguishes each
-of the duplicate albums from each other. The first such field is used as the
-result for ``%aunique``. If no field suffices, an arbitrary number is used to
-distinguish the two albums.
+For full flexibility, the ``%aunique`` function takes three arguments. The
+first two are whitespace-separated lists of album field names: a set of
+*identifiers* and a set of *disambiguators*. The third argument is a pair of
+characters used to surround the disambiguator.
+
+Any group of albums with identical values for all the identifiers will be
+considered "duplicates". Then, the function tries each disambiguator field,
+looking for one that distinguishes each of the duplicate albums from each
+other. The first such field is used as the result for ``%aunique``. If no field
+suffices, an arbitrary number is used to distinguish the two albums.
 
 The default identifiers are ``albumartist album`` and the default disambiguators
 are ``albumtype year label catalognum albumdisambig``. So you can get reasonable
 disambiguation behavior if you just use ``%aunique{}`` with no parameters in
 your path forms (as in the default path formats), but you can customize the
 disambiguation if, for example, you include the year by default in path formats.
 
+The default characters used as brackets are ``[]``. To change this, provide a
+third argument to the ``%aunique`` function consisting of two characters: the left
+and right brackets. Or, to turn off bracketing entirely, leave argument blank.
+
 One caveat: When you import an album that is named identically to one already in
 your library, the *first* album—the one already in your library— will not
 consider itself a duplicate at import time. This means that ``%aunique{}`` will

test/test_library.py

@@ -713,8 +713,8 @@ def test_use_fallback_numbers_when_identical(self):
         album2.year = 2001
         album2.store()
 
-        self._assert_dest(b'/base/foo 1/the title', self.i1)
-        self._assert_dest(b'/base/foo 2/the title', self.i2)
+        self._assert_dest(b'/base/foo [1]/the title', self.i1)
+        self._assert_dest(b'/base/foo [2]/the title', self.i2)
 
     def test_unique_falls_back_to_second_distinguishing_field(self):
         self._setf(u'foo%aunique{albumartist album,month year}/$title')
@@ -730,6 +730,24 @@ def test_unique_sanitized(self):
         self._setf(u'foo%aunique{albumartist album,albumtype}/$title')
         self._assert_dest(b'/base/foo [foo_bar]/the title', self.i1)
 
+    def test_drop_empty_disambig_string(self):
+        album1 = self.lib.get_album(self.i1)
+        album1.albumdisambig = None
+        album2 = self.lib.get_album(self.i2)
+        album2.albumdisambig = u'foo'
+        album1.store()
+        album2.store()
+        self._setf(u'foo%aunique{albumartist album,albumdisambig}/$title')
+        self._assert_dest(b'/base/foo/the title', self.i1)
+
+    def test_change_brackets(self):
+        self._setf(u'foo%aunique{albumartist album,year,()}/$title')
+        self._assert_dest(b'/base/foo (2001)/the title', self.i1)
+
+    def test_remove_brackets(self):
+        self._setf(u'foo%aunique{albumartist album,year,}/$title')
+        self._assert_dest(b'/base/foo 2001/the title', self.i1)
+
 
 class PluginDestinationTest(_common.TestCase):
     def setUp(self):