blob: ce3eff053fdda0d6bd1cbfd4c6c19799b96a9bd0 [file] [log] [blame]
# Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.
import optparse
import os
import platform
import subprocess
import sys
"""A script used to revert one or a sequence of consecutive CLs, for svn and
git-svn users.
def parse_args():
parser = optparse.OptionParser()
parser.add_option('--revisions', '-r', dest='rev_range', action='store',
default=None, help='The revision number(s) of the commits '
'you wish to undo. An individual number, or a range (8-10, '
'8..10, or 8:10).')
args, _ = parser.parse_args()
revision_range = args.rev_range
if revision_range == None:
maybe_fail('You must specify at least one revision number to revert.')
if revision_range.find('-') > -1 or revision_range.find(':') > -1 or \
revision_range.find('..') > -1:
# We have a range of commits to revert.
split = revision_range.split('-')
if len(split) == 1:
split = revision_range.split(':')
if len(split) == 1:
split = revision_range.split('..')
start = int(split[0])
end = int(split[1])
if start > end:
temp = start
start = end
end = temp
if start != end:
maybe_fail('Warning: Are you sure you want to revert a range of '
'revisions? If you just want to revert one CL, only specify '
'one revision number.', user_input=True)
start = end = int(revision_range)
return start, end
def maybe_fail(msg, user_input=False):
"""Determine if we have encountered a condition upon which our script cannot
continue, and abort if so.
- msg: The error or user prompt message to print.
- user_input: True if we require user confirmation to continue. We assume
that the user must enter y to proceed.
if user_input:
force = raw_input(msg + ' (y/N) ')
if force != 'y':
print msg
def has_new_code(is_git):
"""Tests if there are any newer versions of files on the server.
- is_git: True if we are working in a git repository.
if not is_git:
results, _ = run_cmd(['svn', 'st'])
results, _ = run_cmd(['git', 'status'])
for line in results.split('\n'):
if not is_git and (not line.strip().startswith('?') and line != ''):
return True
elif is_git and ('Changes to be committed' in line or
'Changes not staged for commit:' in line):
return True
if is_git:
p = subprocess.Popen(['git', 'log', '-1'], stdout=subprocess.PIPE,
output, _ = p.communicate()
if find_git_info(output) == None:
return True
return False
def run_cmd(cmd_list, suppress_output=False, std_in=''):
"""Run the specified command and print out any output to stdout."""
print ' '.join(cmd_list)
p = subprocess.Popen(cmd_list, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
output, stderr = p.communicate(std_in)
if output and not suppress_output:
print output
if stderr and not suppress_output:
print stderr
return (output, stderr)
def runs_git():
"""Returns True if we're standing in an svn-git repository."""
p = subprocess.Popen(['svn', 'info'], stdout=subprocess.PIPE,
output, err = p.communicate()
if err != None and 'is not a working copy' in err:
p = subprocess.Popen(['git', 'status'], stdout=subprocess.PIPE,
output, _ = p.communicate()
if 'fatal: Not a git repository' in output:
maybe_fail('Error: not running git or svn.')
return True
return False
def find_git_info(git_log, rev_num=None):
"""Determine the latest svn revision number if rev_num = None, or find the
git commit_id that corresponds to a particular svn revision number.
for line in git_log.split('\n'):
tokens = line.split()
if len(tokens) == 2 and tokens[0] == 'commit':
current_commit_id = tokens[1]
elif len(tokens) > 0 and tokens[0] == 'git-svn-id:':
revision_number = int(tokens[1].split('@')[1])
if revision_number == rev_num:
return current_commit_id
if rev_num == None:
return revision_number
def revert(start, end, is_git):
"""Revert the sequence of CLs.
- start: The first CL to revert.
- end: The last CL to revert.
- is_git: True if we are in a git-svn checkout.
if not is_git:
_, err = run_cmd(['svn', 'merge', '-r', '%d:%d' % (end, start-1), '.'],
if 'Conflict discovered' in err:
maybe_fail('Please fix the above conflicts before submitting. Then create'
' a CL and submit your changes to complete the revert.')
# If we're running git, we have to use the log feature to find the commit
# id(s) that correspond to the particular revision number(s).
output, _ = run_cmd(['git', 'log', '-1'], suppress_output=True)
current_revision = find_git_info(output)
distance = (current_revision-start) + 1
output, _ = run_cmd(['git', 'log', '-%d' % distance], suppress_output=True)
reverts = [start]
commit_msg = '"Reverting %d"' % start
if end != start:
reverts = range(start, end + 1)
commit_msg = '%s-%d"' % (commit_msg[:-1], end)
for revert in reverts:
git_commit_id = find_git_info(output, revert)
if git_commit_id == None:
maybe_fail('Error: Revision number not found. Is this earlier than your'
' git checkout history?')
_, err = run_cmd(['git', 'revert', '-n', git_commit_id])
if 'error: could not revert' in err or 'unmerged' in err:
command_sequence = ''
for revert in reverts:
git_commit_id = find_git_info(output, revert)
command_sequence += 'git revert -n %s\n' % git_commit_id
maybe_fail('There are conflicts while reverting. Please resolve these '
'after manually running:\n' + command_sequence + 'and then '
'create a CL and submit to complete the revert.')
run_cmd(['git', 'commit', '-m', commit_msg])
def main():
revisions = parse_args()
git_user = runs_git()
if has_new_code(git_user):
maybe_fail('WARNING: This checkout has local modifications!! This could '
'result in a CL that is not just a revert and/or you could lose your'
' local changes! Are you **SURE** you want to continue? ',
if git_user:
run_cmd(['git', 'cl', 'rebase'])
run_cmd(['gclient', 'sync'])
revert(revisions[0], revisions[1], git_user)
print ('Now, create a CL and submit! The buildbots and your teammates thank '
if __name__ == '__main__':