git cl try-results: make color force-able.

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."""
 
 from distutils.version import LooseVersion
@@ skipping 435 matching lines @@
         max(len(str(get_builder(b))) for b in builds.itervalues()))
     def get_name(b):
       return name_fmt % get_builder(b)
 
   def sort_key(b):
     return b['status'], b.get('result'), get_name(b), b.get('url')
 
   def pop(title, f, color=None, **kwargs):
     """Pop matching builds from `builds` dict and print them."""
 
-    if not sys.stdout.isatty() or color is None:
+    if not options.color or color is None:
       colorize = str
     else:
       colorize = lambda x: '%s%s%s' % (color, x, Fore.RESET)
 
     result = []
     for b in builds.values():
       if all(b.get(k) == v for k, v in kwargs.iteritems()):
         builds.pop(b['id'])
         result.append(b)
     if result:
@@ skipping 3078 matching lines @@
       for builder in sorted(builders):
         print '  %*s: %s' % (length, builder, ','.join(builders[builder]))
   return 0
 
 
 def CMDtry_results(parser, args):
   group = optparse.OptionGroup(parser, "Try job results options")
   group.add_option(
       "-p", "--patchset", type=int, help="patchset number if not current.")
   group.add_option(
-      "--print-master", action='store_true', help="print master name as well")
+      "--print-master", action='store_true', help="print master name as well.")
+  group.add_option(
+      "--color", action='store_true', default=sys.stdout.isatty(),
+      help="force color output, useful when piping output.")
   group.add_option(
       "--buildbucket-host", default='cr-buildbucket.appspot.com',
       help="Host of buildbucket. The default host is %default.")
   parser.add_option_group(group)
   auth.add_auth_options(parser)
   options, args = parser.parse_args(args)
   if args:
     parser.error('Unrecognized args: %s' % ' '.join(args))
 
   auth_config = auth.extract_auth_config_from_options(options)
@@ skipping 417 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()
   colorama.init()
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)