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": "([0-9a-f]{2,40})",' % project
  37   new_line = r'\1"%s_revision": "%s",' % (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 class PrintSubprocess(object):
  49   """Wrapper for subprocess2 which prints out every command."""
  50   def __getattr__(self, attr):
  51     def _run_subprocess2(cmd, *args, **kwargs):
  52       print cmd
  53       sys.stdout.flush()
  54       return getattr(subprocess2, attr)(cmd, *args, **kwargs)
  55     return _run_subprocess2
  56
  57 prnt_subprocess = PrintSubprocess()
  58
  59
  60 def main():
  61   tool_dir = os.path.dirname(os.path.abspath(__file__))
  62   parser = optparse.OptionParser(usage='%prog [options] <project> <new rev>',
  63                                  description=sys.modules[__name__].__doc__)
  64   parser.add_option('-v', '--verbose', action='count', default=0)
  65   parser.add_option('--dry-run', action='store_true')
  66   parser.add_option('-f', '--force', action='store_true',
  67                     help='Make destructive changes to the local checkout if '
  68                          'necessary.')
  69   parser.add_option('--commit', action='store_true', default=True,
  70                     help='(default) Put change in commit queue on upload.')
  71   parser.add_option('--no-commit', action='store_false', dest='commit',
  72                     help='Don\'t put change in commit queue on upload.')
  73   parser.add_option('-r', '--reviewers', default='',
  74                     help='Add given users as either reviewers or TBR as'
  75                     ' appropriate.')
  76   parser.add_option('--upstream', default='origin/master',
  77                     help='(default "%default") Use given start point for change'
  78                     ' to upload. For instance, if you use the old git workflow,'
  79                     ' you might set it to "origin/trunk".')
  80   parser.add_option('--cc', help='CC email addresses for issue.')
  81   parser.add_option('-m', '--message', help='Custom commit message.')
  82
  83   options, args = parser.parse_args()
  84   logging.basicConfig(
  85       level=
  86           [logging.WARNING, logging.INFO, logging.DEBUG][
  87             min(2, options.verbose)])
  88   if len(args) != 2:
  89     parser.print_help()
  90     exit(0)
  91
  92   root_dir = os.path.dirname(tool_dir)
  93   os.chdir(root_dir)
  94
  95   project = args[0]
  96   new_rev = args[1]
  97
  98   # Silence the editor.
  99   os.environ['EDITOR'] = 'true'
 100
 101   if options.force and not options.dry_run:
 102     prnt_subprocess.check_call(['git', 'clean', '-d', '-f'])
 103     prnt_subprocess.call(['git', 'rebase', '--abort'])
 104
 105   old_branch = scm.GIT.GetBranch(root_dir)
 106   new_branch = '%s_roll' % project
 107
 108   if options.upstream == new_branch:
 109     parser.error('Cannot set %s as its own upstream.' % new_branch)
 110
 111   if old_branch == new_branch:
 112     if options.force:
 113       if not options.dry_run:
 114         prnt_subprocess.check_call(['git', 'checkout', options.upstream, '-f'])
 115         prnt_subprocess.call(['git', 'branch', '-D', old_branch])
 116     else:
 117       parser.error('Please delete the branch %s and move to a different branch'
 118                    % new_branch)
 119
 120   if not options.dry_run:
 121     prnt_subprocess.check_call(['git', 'fetch', 'origin'])
 122     prnt_subprocess.call(['git', 'svn', 'fetch'])
 123     branch_cmd = ['git', 'checkout', '-b', new_branch, options.upstream]
 124     if options.force:
 125       branch_cmd.append('-f')
 126     prnt_subprocess.check_output(branch_cmd)
 127
 128   try:
 129     old_rev = process_deps(os.path.join(root_dir, 'DEPS'), project, new_rev,
 130                            options.dry_run)
 131     print '%s roll %s:%s' % (project.title(), old_rev, new_rev)
 132
 133     review_field = 'TBR' if options.commit else 'R'
 134     commit_msg = options.message or '%s roll %s:%s\n' % (project.title(),
 135                                                          old_rev, new_rev)
 136     commit_msg += '\n%s=%s\n' % (review_field, options.reviewers)
 137
 138     if options.dry_run:
 139       print 'Commit message: ' + commit_msg
 140       return 0
 141
 142     prnt_subprocess.check_output(['git', 'commit', '-m', commit_msg, 'DEPS'])
 143     prnt_subprocess.check_call(['git', 'diff', '--no-ext-diff',
 144                                 options.upstream])
 145     upload_cmd = ['git', 'cl', 'upload', '--bypass-hooks']
 146     if options.commit:
 147       upload_cmd.append('--use-commit-queue')
 148     if options.reviewers:
 149       upload_cmd.append('--send-mail')
 150     if options.cc:
 151       upload_cmd.extend(['--cc', options.cc])
 152     prnt_subprocess.check_call(upload_cmd)
 153   finally:
 154     if not options.dry_run:
 155       prnt_subprocess.check_output(['git', 'checkout', old_branch])
 156       prnt_subprocess.check_output(['git', 'branch', '-D', new_branch])
 157   return 0
 158
 159
 160 if __name__ == '__main__':
 161   sys.exit(main())