git cl try: clarify where the default set of bots is coming from.

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 distutils.version import LooseVersion
@@ skipping 4380 matching lines @@
                               'infra', 'config', 'cq.cfg')
         if os.path.exists(cq_cfg):
           masters = {}
           cq_masters = commit_queue.get_master_builder_map(
               cq_cfg, include_experimental=False, include_triggered=False)
           for master, builders in cq_masters.iteritems():
             for builder in builders:
               # Skip presubmit builders, because these will fail without LGTM.
               masters.setdefault(master, {})[builder] = ['defaulttests']
           if masters:
+            print('Loaded default bots from CQ config (%s)' % cq_cfg)
             return masters
+          else:
+            print('CQ config exists (%s) but has no try bots listed' % cq_cfg)

[Sergiy Byelozyorov, 2016/06/07 14:58:14]

It's not clear from the message what is used in this case.

 
     if not options.bot:
       parser.error('No default try builder to try, use --bot')
 
     builders_and_tests = {}
     # TODO(machenbach): The old style command-line options don't support
     # multiple try masters yet.
     old_style = filter(lambda x: isinstance(x, basestring), options.bot)
     new_style = filter(lambda x: isinstance(x, tuple), options.bot)
 
@@ skipping 523 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)