tools/safely-roll-deps.py

   1 #!/usr/bin/env python
   2 # Copyright 2014 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 a DEPS entry 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, project, new_rev, is_dry_run):
  28   """Update project_revision to |new_issue|.
  29
  30   A bit hacky, could it be made better?
  31   """
  32   content = open(path).read()
  33   # Hack for Blink to get the AutoRollBot running again.
  34   if project == "blink":
  35     project = "webkit"
  36   old_line = r'(\s+)"%s_revision": "(\d+)",' % project
  37   new_line = r'\1"%s_revision": "%d",' % (project, new_rev)
  38   new_content = re.sub(old_line, new_line, content, 1)
  39   old_rev = re.search(old_line, content).group(2)
  40   if not old_rev or new_content == content:
  41     die_with_error('Failed to update the DEPS file')
  42
  43   if not is_dry_run:
  44     open(path, 'w').write(new_content)
  45   return old_rev
  46
  47
  48 def main():
  49   tool_dir = os.path.dirname(os.path.abspath(__file__))
  50   parser = optparse.OptionParser(usage='%prog [options] <project> <new rev>',
  51                                  description=sys.modules[__name__].__doc__)
  52   parser.add_option('-v', '--verbose', action='count', default=0)
  53   parser.add_option('--dry-run', action='store_true')
  54   parser.add_option('--commit', action='store_true', default=True,
  55                     help='(default) Put change in commit queue on upload.')
  56   parser.add_option('--no-commit', action='store_false', dest='commit',
  57                     help='Don\'t put change in commit queue on upload.')
  58   parser.add_option('-r', '--reviewers', default='',
  59                     help='Add given users as either reviewers or TBR as'
  60                     ' appropriate.')
  61   parser.add_option('--upstream', default='origin/master',
  62                     help='(default "%default") Use given start point for change'
  63                     ' to upload. For instance, if you use the old git workflow,'
  64                     ' you might set it to "origin/trunk".')
  65   parser.add_option('--cc', help='CC email addresses for issue.')
  66   parser.add_option('-m', '--message', help='Custom commit message.')
  67
  68   options, args = parser.parse_args()
  69   logging.basicConfig(
  70       level=
  71           [logging.WARNING, logging.INFO, logging.DEBUG][
  72             min(2, options.verbose)])
  73   if len(args) != 2:
  74     parser.print_help()
  75     exit(0)
  76
  77   root_dir = os.path.dirname(tool_dir)
  78   os.chdir(root_dir)
  79
  80   project = args[0]
  81   new_rev = int(args[1])
  82
  83   # Silence the editor.
  84   os.environ['EDITOR'] = 'true'
  85
  86   old_branch = scm.GIT.GetBranch(root_dir)
  87   new_branch = '%s_roll' % project
  88   if old_branch == new_branch:
  89     parser.error('Please delete the branch %s and move to a different branch'
  90                  % new_branch)
  91
  92   if not options.dry_run:
  93     subprocess2.check_output(
  94         ['git', 'checkout', '-b', new_branch, options.upstream])
  95
  96   try:
  97     old_rev = int(process_deps(os.path.join(root_dir, 'DEPS'), project, new_rev,
  98                                options.dry_run))
  99     print '%s roll %s:%s' % (project.title(), old_rev, new_rev)
 100
 101     review_field = 'TBR' if options.commit else 'R'
 102     commit_msg = options.message or (
 103         '%s roll %s:%s\n'
 104         '\n'
 105         '%s=%s\n' % (project.title(), old_rev, new_rev,
 106                      review_field, options.reviewers))
 107
 108     if options.dry_run:
 109       print 'Commit message: ' + commit_msg
 110       return 0
 111
 112     subprocess2.check_output(['git', 'commit', '-m', commit_msg, 'DEPS'])
 113     subprocess2.check_call(['git', 'diff', '--no-ext-diff', options.upstream])
 114     upload_cmd = ['git', 'cl', 'upload']
 115     if options.commit:
 116       upload_cmd.append('--use-commit-queue')
 117     if options.reviewers:
 118       upload_cmd.append('--send-mail')
 119     if options.cc:
 120       upload_cmd.extend(['--cc', options.cc])
 121     subprocess2.check_call(upload_cmd)
 122   finally:
 123     if not options.dry_run:
 124       subprocess2.check_output(['git', 'checkout', old_branch])
 125       subprocess2.check_output(['git', 'branch', '-D', new_branch])
 126   return 0
 127
 128
 129 if __name__ == '__main__':
 130   sys.exit(main())