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1#!/usr/bin/env python
2# Copyright (c) 2012 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6"""Generate a CL to roll Blink to the specified revision number and post
7it to Rietveld so that the CL will land automatically if it passes the
8commit-queue's checks.
9"""
10
11import logging
12import optparse
13import os
14import re
15import sys
16
17import find_depot_tools
18import scm
19import subprocess2
20
21
22def die_with_error(msg):
23  print >> sys.stderr, msg
24  sys.exit(1)
25
26
27def process_deps(path, new_rev, is_dry_run):
28  """Update webkit_revision to |new_issue|.
29
30  A bit hacky, could it be made better?
31  """
32  content = open(path).read()
33  old_line = r'(\s+)"webkit_revision": "(\d+)",'
34  new_line = r'\1"webkit_revision": "%d",' % new_rev
35  new_content = re.sub(old_line, new_line, content, 1)
36  old_rev = re.search(old_line, content).group(2)
37  if not old_rev or new_content == content:
38    die_with_error('Failed to update the DEPS file')
39
40  if not is_dry_run:
41    open(path, 'w').write(new_content)
42  return old_rev
43
44
45def main():
46  tool_dir = os.path.dirname(os.path.abspath(__file__))
47  parser = optparse.OptionParser(usage='%prog [options] <new blink rev>')
48  parser.add_option('-v', '--verbose', action='count', default=0)
49  parser.add_option('--dry-run', action='store_true')
50  parser.add_option('--commit', action='store_true', default=True,
51                    help='(default) Put change in commit queue on upload.')
52  parser.add_option('--no-commit', action='store_false', dest='commit',
53                    help='Don\'t put change in commit queue on upload.')
54  parser.add_option('-r', '--reviewers', default='',
55                    help='Add given users as either reviewers or TBR as'
56                    ' appropriate.')
57  parser.add_option('--upstream', default='origin/master',
58                    help='(default "%default") Use given start point for change'
59                    ' to upload. For instance, if you use the old git workflow,'
60                    ' you might set it to "origin/trunk".')
61  parser.add_option('--cc', help='CC email addresses for issue.')
62
63  options, args = parser.parse_args()
64  logging.basicConfig(
65      level=
66          [logging.WARNING, logging.INFO, logging.DEBUG][
67            min(2, options.verbose)])
68  if len(args) != 1:
69    parser.print_help()
70    exit(0)
71
72  root_dir = os.path.dirname(tool_dir)
73  os.chdir(root_dir)
74
75  new_rev = int(args[0])
76
77  # Silence the editor.
78  os.environ['EDITOR'] = 'true'
79
80  old_branch = scm.GIT.GetBranch(root_dir)
81  if old_branch == 'blink_roll':
82    parser.error(
83        'Please delete the branch blink_roll and move to a different branch')
84
85  if not options.dry_run:
86    subprocess2.check_output(
87        ['git', 'checkout', '-b', 'blink_roll', options.upstream])
88
89  try:
90    old_rev = int(process_deps(os.path.join(root_dir, 'DEPS'), new_rev,
91                               options.dry_run))
92    print 'Blink roll %s:%s' % (old_rev, new_rev)
93
94    review_field = 'TBR' if options.commit else 'R'
95    commit_msg = ('Blink roll %s:%s\n'
96                 '\n'
97                 'http://build.chromium.org/f/chromium/perf/dashboard/ui/'
98                 'changelog_blink.html?url=/trunk&range=%s:%s&mode=html'
99                 '\n'
100                 '%s=%s\n' % (old_rev, new_rev,
101                              old_rev+1, new_rev,
102                              review_field,
103                              options.reviewers))
104
105    if options.dry_run:
106      print 'Commit message: ' + commit_msg
107      return 0
108
109    subprocess2.check_output(['git', 'commit', '-m', commit_msg, 'DEPS'])
110    subprocess2.check_call(['git', 'diff', options.upstream])
111    upload_cmd = ['git', 'cl', 'upload']
112    if options.commit:
113      upload_cmd.append('--use-commit-queue')
114    if options.reviewers:
115      upload_cmd.append('--send-mail')
116    if options.cc:
117      upload_cmd.extend(['--cc', options.cc])
118    subprocess2.check_call(upload_cmd)
119  finally:
120    if not options.dry_run:
121      subprocess2.check_output(['git', 'checkout', old_branch])
122      subprocess2.check_output(['git', 'branch', '-D', 'blink_roll'])
123  return 0
124
125
126if __name__ == '__main__':
127  sys.exit(main())
128