Revert of Remove tools/safely-roll-blink now that tools/safely-roll-deps is stable.

tools/safely-roll-deps.py

Index: tools/safely-roll-deps.py
diff --git a/tools/safely-roll-deps.py b/tools/safely-roll-deps.py
new file mode 100755
index 0000000000000000000000000000000000000000..0e75715c32299d97a37b39b1850b3214b64ddbfb
--- /dev/null
+++ b/tools/safely-roll-deps.py
@@ -0,0 +1,161 @@
+#!/usr/bin/env python
+# Copyright 2014 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.
+
+"""Generate a CL to roll a DEPS entry to the specified revision number and post
+it to Rietveld so that the CL will land automatically if it passes the
+commit-queue's checks.
+"""
+
+import logging
+import optparse
+import os
+import re
+import sys
+
+import find_depot_tools
+import scm
+import subprocess2
+
+
+def die_with_error(msg):
+  print >> sys.stderr, msg
+  sys.exit(1)
+
+
+def process_deps(path, project, new_rev, is_dry_run):
+  """Update project_revision to |new_issue|.
+
+  A bit hacky, could it be made better?
+  """
+  content = open(path).read()
+  # Hack for Blink to get the AutoRollBot running again.
+  if project == "blink":
+    project = "webkit"
+  old_line = r'(\s+)"%s_revision": "([0-9a-f]{2,40})",' % project
+  new_line = r'\1"%s_revision": "%s",' % (project, new_rev)
+  new_content = re.sub(old_line, new_line, content, 1)
+  old_rev = re.search(old_line, content).group(2)
+  if not old_rev or new_content == content:
+    die_with_error('Failed to update the DEPS file')
+
+  if not is_dry_run:
+    open(path, 'w').write(new_content)
+  return old_rev
+
+
+class PrintSubprocess(object):
+  """Wrapper for subprocess2 which prints out every command."""
+  def __getattr__(self, attr):
+    def _run_subprocess2(cmd, *args, **kwargs):
+      print cmd
+      sys.stdout.flush()
+      return getattr(subprocess2, attr)(cmd, *args, **kwargs)
+    return _run_subprocess2
+
+prnt_subprocess = PrintSubprocess()
+
+
+def main():
+  tool_dir = os.path.dirname(os.path.abspath(__file__))
+  parser = optparse.OptionParser(usage='%prog [options] <project> <new rev>',
+                                 description=sys.modules[__name__].__doc__)
+  parser.add_option('-v', '--verbose', action='count', default=0)
+  parser.add_option('--dry-run', action='store_true')
+  parser.add_option('-f', '--force', action='store_true',
+                    help='Make destructive changes to the local checkout if '
+                         'necessary.')
+  parser.add_option('--commit', action='store_true', default=True,
+                    help='(default) Put change in commit queue on upload.')
+  parser.add_option('--no-commit', action='store_false', dest='commit',
+                    help='Don\'t put change in commit queue on upload.')
+  parser.add_option('-r', '--reviewers', default='',
+                    help='Add given users as either reviewers or TBR as'
+                    ' appropriate.')
+  parser.add_option('--upstream', default='origin/master',
+                    help='(default "%default") Use given start point for change'
+                    ' to upload. For instance, if you use the old git workflow,'
+                    ' you might set it to "origin/trunk".')
+  parser.add_option('--cc', help='CC email addresses for issue.')
+  parser.add_option('-m', '--message', help='Custom commit message.')
+
+  options, args = parser.parse_args()
+  logging.basicConfig(
+      level=
+          [logging.WARNING, logging.INFO, logging.DEBUG][
+            min(2, options.verbose)])
+  if len(args) != 2:
+    parser.print_help()
+    exit(0)
+
+  root_dir = os.path.dirname(tool_dir)
+  os.chdir(root_dir)
+
+  project = args[0]
+  new_rev = args[1]
+
+  # Silence the editor.
+  os.environ['EDITOR'] = 'true'
+
+  if options.force and not options.dry_run:
+    prnt_subprocess.check_call(['git', 'clean', '-d', '-f'])
+    prnt_subprocess.call(['git', 'rebase', '--abort'])
+
+  old_branch = scm.GIT.GetBranch(root_dir)
+  new_branch = '%s_roll' % project
+
+  if options.upstream == new_branch:
+    parser.error('Cannot set %s as its own upstream.' % new_branch)
+
+  if old_branch == new_branch:
+    if options.force:
+      if not options.dry_run:
+        prnt_subprocess.check_call(['git', 'checkout', options.upstream, '-f'])
+        prnt_subprocess.call(['git', 'branch', '-D', old_branch])
+    else:
+      parser.error('Please delete the branch %s and move to a different branch'
+                   % new_branch)
+
+  if not options.dry_run:
+    prnt_subprocess.check_call(['git', 'fetch', 'origin'])
+    prnt_subprocess.call(['git', 'svn', 'fetch'])
+    branch_cmd = ['git', 'checkout', '-b', new_branch, options.upstream]
+    if options.force:
+      branch_cmd.append('-f')
+    prnt_subprocess.check_output(branch_cmd)
+
+  try:
+    old_rev = process_deps(os.path.join(root_dir, 'DEPS'), project, new_rev,
+                           options.dry_run)
+    print '%s roll %s:%s' % (project.title(), old_rev, new_rev)
+
+    review_field = 'TBR' if options.commit else 'R'
+    commit_msg = options.message or '%s roll %s:%s\n' % (project.title(),
+                                                         old_rev, new_rev)
+    commit_msg += '\n%s=%s\n' % (review_field, options.reviewers)
+
+    if options.dry_run:
+      print 'Commit message: ' + commit_msg
+      return 0
+
+    prnt_subprocess.check_output(['git', 'commit', '-m', commit_msg, 'DEPS'])
+    prnt_subprocess.check_call(['git', 'diff', '--no-ext-diff',
+                                options.upstream])
+    upload_cmd = ['git', 'cl', 'upload']
+    if options.commit:
+      upload_cmd.append('--use-commit-queue')
+    if options.reviewers:
+      upload_cmd.append('--send-mail')
+    if options.cc:
+      upload_cmd.extend(['--cc', options.cc])
+    prnt_subprocess.check_call(upload_cmd)
+  finally:
+    if not options.dry_run:
+      prnt_subprocess.check_output(['git', 'checkout', old_branch])
+      prnt_subprocess.check_output(['git', 'branch', '-D', new_branch])
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())