Fix fnmatch

fnmatch does not accept regular expressions as presumed in
0c4851e436 See
http://docs.python.org/2/library/fnmatch.html

This patch actually completely broke tagging. All we need to do is make
sure any [ or ] used is conbverted into [[] or []].

Fixes #2557 and  #2362

couchpotato/core/helpers/variable.py

@@ -11,6 +11,9 @@ import sys
 
 log = CPLog(__name__)
 
+def fnEscape(pattern):
+    return pattern.replace('[','[[').replace(']','[]]').replace('[[','[[]')
+
 def link(src, dst):
     if os.name == 'nt':
         import ctypes

couchpotato/core/plugins/renamer/main.py

@@ -3,7 +3,7 @@ from couchpotato.api import addApiView
 from couchpotato.core.event import addEvent, fireEvent, fireEventAsync
 from couchpotato.core.helpers.encoding import toUnicode, ss, sp
 from couchpotato.core.helpers.variable import getExt, mergeDicts, getTitle, \
-    getImdb, link, symlink, tryInt, splitString
+    getImdb, link, symlink, tryInt, splitString, fnEscape
 from couchpotato.core.logger import CPLog
 from couchpotato.core.plugins.base import Plugin
 from couchpotato.core.settings.model import Library, File, Profile, Release, \
@@ -644,7 +644,7 @@ Remove it if you want it to be renamed (again, or at least let it try again)
 
         # Match all found ignore files with the tag_files and delete if found
         for tag_file in tag_files:
-            ignore_file = fnmatch.filter(ignore_files, '%s.%s.ignore' % (re.escape(os.path.splitext(tag_file)[0]), tag if tag else '*'))
+            ignore_file = fnmatch.filter(ignore_files, fnEscape('%s.%s.ignore' % (os.path.splitext(tag_file)[0], tag if tag else '*')))
             for filename in ignore_file:
                 try:
                     os.remove(filename)
@@ -677,7 +677,7 @@ Remove it if you want it to be renamed (again, or at least let it try again)
 
         # Match all found ignore files with the tag_files and return True found
         for tag_file in tag_files:
-            ignore_file = fnmatch.filter(ignore_files, '%s.%s.ignore' % (os.path.splitext(tag_file)[0], tag if tag else '*'))
+            ignore_file = fnmatch.filter(ignore_files, fnEscape('%s.%s.ignore' % (os.path.splitext(tag_file)[0], tag if tag else '*')))
             if ignore_file:
                 return True