Roll src/third_party/WebKit f007c95:0171005 (svn 185074:185088)
[chromium-blink-merge.git] / tools / safely-roll-deps.py
blob7c64aaee6cb0882212370c84c5fcdfd4a2ce89e3
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.
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 """
11 import logging
12 import optparse
13 import os
14 import re
15 import sys
17 import find_depot_tools
18 import scm
19 import subprocess2
22 def die_with_error(msg):
23 print >> sys.stderr, msg
24 sys.exit(1)
27 def process_deps(path, project, new_rev, is_dry_run):
28 """Update project_revision to |new_issue|.
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')
43 if not is_dry_run:
44 open(path, 'w').write(new_content)
45 return old_rev
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
57 prnt_subprocess = PrintSubprocess()
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.')
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)
92 root_dir = os.path.dirname(tool_dir)
93 os.chdir(root_dir)
95 project = args[0]
96 new_rev = args[1]
98 # Silence the editor.
99 os.environ['EDITOR'] = 'true'
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'])
105 old_branch = scm.GIT.GetBranch(root_dir)
106 new_branch = '%s_roll' % project
108 if options.upstream == new_branch:
109 parser.error('Cannot set %s as its own upstream.' % new_branch)
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)
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)
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)
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)
138 if options.dry_run:
139 print 'Commit message: ' + commit_msg
140 return 0
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
160 if __name__ == '__main__':
161 sys.exit(main())