Write docs for options_ui

chrome/common/extensions/docs/server2/rietveld_patcher.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import json
 import tarfile
 from StringIO import StringIO
 
 from file_system import FileNotFoundError
 from future import Future
@@ skipping 34 matching lines @@
           'Failed to fetch information for issue %s.' % self._issue)
 
     if issue_json.get('closed'):
       raise RietveldPatcherError('Issue %s has been closed.' % self._issue)
 
     patchsets = issue_json.get('patchsets')
     if not isinstance(patchsets, list) or len(patchsets) == 0:
       raise RietveldPatcherError('Cannot parse issue %s.' % self._issue)
 
     if not issue_json.get('base_url') in _CHROMIUM_REPO_BASEURLS:
-      raise RietveldPatcherError('Issue %s\'s base url is unknown.' %
-          self._issue)
+      raise RietveldPatcherError('Issue %s\'s base url "%s" is unknown.' %
+          self._issue, issue_json.get('base_url'))
 
     return str(patchsets[-1])
 
   def GetPatchedFiles(self, version=None):
     if version is None:
       patchset = self.GetVersion()
     else:
       patchset = version
     try:
       patchset_json = json.loads(self._fetcher.Fetch(
@@ skipping 66 matching lines @@
             patched_file.close()
 
         value[path] = data
 
       return value
     return self._fetcher.FetchAsync('tarball/%s/%s' % (self._issue,
                                                        version)).Then(apply_)
 
   def GetIdentity(self):
     return self._issue