Add commit_queue.py tool to toggle the bit of the commit queue from command line

commit_queue.py

Index: commit_queue.py
diff --git a/commit_queue.py b/commit_queue.py
new file mode 100755
index 0000000000000000000000000000000000000000..3f4e7b68deeaae892d02a59f4a28831d98ee2429
--- /dev/null
+++ b/commit_queue.py
@@ -0,0 +1,187 @@
+#!/usr/bin/env python
+# Copyright (c) 2011 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.
+
+"""Access the commit queue from the command line.
+"""
+
+__version__ = '0.1'
+
+import functools
+import logging
+import optparse
+import os
+import sys
+import urllib2
+
+import breakpad  # pylint: disable=W0611
+
+import fix_encoding
+import rietveld
+
+
+def usage(more):
+  def hook(fn):
+    fn.func_usage_more = more
+    return fn
+  return hook
+
+
+def need_issue(fn):
+  """Post-parse args to create a Rietveld object."""
+  @functools.wraps(fn)
+  def hook(parser, args, *extra_args, **kwargs):
+    old_parse_args = parser.parse_args
+
+    def new_parse_args(args):
+      options, args = old_parse_args(args)
+      if not options.issue:
+        parser.error('Require --issue')
+      obj = rietveld.Rietveld(options.server, options.user, None)
+      return options, args, obj
+
+    parser.parse_args = new_parse_args
+
+    parser.add_option(
+        '-u', '--user',
+        metavar='U',
+        default=os.environ.get('EMAIL_ADDRESS', None),
+        help='Email address, default: %default')
+    parser.add_option(
+        '-i', '--issue',
+        metavar='I',
+        type='int',
+        help='Rietveld issue number')
+    parser.add_option(
+        '-s',
+        '--server',
+        metavar='S',
+        default='http://codereview.chromium.org',
+        help='Rietveld server, default: %default')
+
+    # Call the original function with the modified parser.
+    return fn(parser, args, *extra_args, **kwargs)
+
+  hook.func_usage_more = '[options]'
+  return hook
+
+
+def set_commit(obj, issue, flag):
+  """Sets the commit bit flag on an issue."""
+  try:
+    patchset = obj.get_issue_properties(issue, False)['patchsets'][-1]
+    print obj.set_flag(issue, patchset, 'commit', flag)
+  except urllib2.HTTPError, e:
+    if e.code == 404:
+      print >> sys.stderr, 'Issue %d doesn\'t exist.' % issue
+    elif e.code == 403:
+      print >> sys.stderr, 'Access denied to issue %d.' % issue
+    else:
+      raise
+    return 1
+
+@need_issue
+def CMDset(parser, args):
+  """Sets the commit bit."""
+  options, args, obj = parser.parse_args(args)
+  if args:
+    parser.error('Unrecognized args: %s' % ' '.join(args))
+  return set_commit(obj, options.issue, '1')
+
+
+@need_issue
+def CMDclear(parser, args):
+  """Clears the commit bit."""
+  options, args, obj = parser.parse_args(args)
+  if args:
+    parser.error('Unrecognized args: %s' % ' '.join(args))
+  return set_commit(obj, options.issue, '0')
+
+
+###############################################################################
+## Boilerplate code
+
+
+def gen_parser():
+  """Returns an OptionParser instance with default options.
+
+  It should be then processed with gen_usage() before being used.
+  """
+  parser = optparse.OptionParser(version=__version__)
+  # Remove description formatting
+  parser.format_description = lambda x: parser.description
+  # Add common parsing.
+  old_parser_args = parser.parse_args
+
+  def Parse(*args, **kwargs):
+    options, args = old_parser_args(*args, **kwargs)
+    logging.basicConfig(
+        level=[logging.WARNING, logging.INFO, logging.DEBUG][
+            min(2, options.verbose)],
+        format='%(levelname)s %(filename)s(%(lineno)d): %(message)s')
+    return options, args
+
+  parser.parse_args = Parse
+
+  parser.add_option(
+      '-v', '--verbose', action='count', default=0,
+      help='Use multiple times to increase logging level')
+  return parser
+
+
+def Command(name):
+  return getattr(sys.modules[__name__], 'CMD' + name, None)
+
+
+@usage('<command>')
+def CMDhelp(parser, args):
+  """Print list of commands or use 'help <command>'."""
+  # Strip out the help command description and replace it with the module
+  # docstring.
+  parser.description = sys.modules[__name__].__doc__
+  parser.description += '\nCommands are:\n' + '\n'.join(
+      '  %-12s %s' % (
+        fn[3:], Command(fn[3:]).__doc__.split('\n', 1)[0].rstrip('.'))
+      for fn in dir(sys.modules[__name__]) if fn.startswith('CMD'))
+
+  _, args = parser.parse_args(args)
+  if len(args) == 1 and args[0] != 'help':
+    return main(args + ['--help'])
+  parser.print_help()
+  return 0
+
+
+def gen_usage(parser, command):
+  """Modifies an OptionParser object with the command's documentation.
+
+  The documentation is taken from the function's docstring.
+  """
+  obj = Command(command)
+  more = getattr(obj, 'func_usage_more')
+  # OptParser.description prefer nicely non-formatted strings.
+  parser.description = obj.__doc__ + '\n'
+  parser.set_usage('usage: %%prog %s %s' % (command, more))
+
+
+def main(args=None):
+  # Do it late so all commands are listed.
+  # pylint: disable=E1101
+  parser = gen_parser()
+  if args is None:
+    args = sys.argv[1:]
+  if args:
+    command = Command(args[0])
+    if command:
+      # "fix" the usage and the description now that we know the subcommand.
+      gen_usage(parser, args[0])
+      return command(parser, args[1:])
+
+  # Not a known command. Default to help.
+  gen_usage(parser, 'help')
+  return CMDhelp(parser, args)
+
+
+if __name__ == "__main__":
+  fix_encoding.fix_encoding()
+  sys.exit(main())