tools/safely-roll-blink.py

   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
   7 it to Rietveld so that the CL will land automatically if it passes the
   8 commit-queue's checks.
   9 """
  10
  11 import logging
  12 import optparse
  13 import os
  14 import re
  15 import sys
  16
  17 import find_depot_tools
  18 import scm
  19 import subprocess2
  20
  21
  22 def die_with_error(msg):
  23   print >> sys.stderr, msg
  24   sys.exit(1)
  25
  26
  27 def 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
  45 def 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
 126 if __name__ == '__main__':
 127   sys.exit(main())