Handle KeyboardInterrupt consistently in python scripts

git_number.py

 #!/usr/bin/env python
 # 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.
 
 """Usage: %prog [options] [<commitref>]*
 
 If no <commitref>'s are supplied, it defaults to HEAD.
 
 Calculates the generation number for one or more commits in a git repo.
@@ skipping 257 matching lines @@
       targets = git.parse_commitrefs(*(args or ['HEAD']))
     except git.BadCommitRefException as e:
       parser.error(e)
 
     load_generation_numbers(targets)
     if not opts.no_cache:
       finalize(targets)
 
     print '\n'.join(map(str, map(get_num, targets)))
     return 0
   except KeyboardInterrupt:

[M-A Ruel, 2015/02/26 00:57:39]

It's already handled there, worth removing

[Sam Clegg, 2015/02/26 17:29:21]

Done.

     return 1
+  return 0
 
 
 if __name__ == '__main__':  # pragma: no cover
-  sys.exit(main())
+  try:
+    sys.exit(main())
+  except KeyboardInterrupt:
+    print 'interrupted'
+    sys.exit(1)