Gerrit git cl upload: auto-filter patchset titles.

git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld and Gerrit."""
 
 from __future__ import print_function
@@ skipping 2499 matching lines @@
       ask_for_data('About to upload; enter to confirm.')
 
     if options.reviewers or options.tbr_owners:
       change_desc.update_reviewers(options.reviewers, options.tbr_owners,
                                    change)
 
     # Extra options that can be specified at push time. Doc:
     # https://gerrit-review.googlesource.com/Documentation/user-upload.html
     refspec_opts = []
     if options.title:
+      if not re.match(r'^[\w ]+$', options.title):
+        options.title = re.sub(r'[^\w ]', '', options.title)
+        print('WARNING: Patchset title may only contain alphanumeric chars '
+              'and spaces. Cleaned up title:\n%s' % options.title)
+        if not options.force:
+          ask_for_data('Press enter to continue, Ctrl+C to abort')
       # Per doc, spaces must be converted to underscores, and Gerrit will do the
       # reverse on its side.
-      if '_' in options.title:
-        print('WARNING: underscores in title will be converted to spaces.')
       refspec_opts.append('m=' + options.title.replace(' ', '_'))
 
     if options.send_mail:
       if not change_desc.get_reviewers():
         DieWithError('Must specify reviewers to send email.')
       refspec_opts.append('notify=ALL')
     else:
       refspec_opts.append('notify=NONE')
 
     cc = self.GetCCList().split(',')
@@ skipping 2571 matching lines @@
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   setup_color.init()
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)