mirror of
https://github.com/dart-lang/sdk
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f68a385ec8
BUG= Review URL: https://codereview.chromium.org//11299110 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@15172 260f80e4-7a28-3924-810f-c04153c831b5
192 lines
7.1 KiB
Python
Executable file
192 lines
7.1 KiB
Python
Executable file
#!/usr/bin/python
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# Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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# for details. All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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import optparse
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import os
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import platform
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import subprocess
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import sys
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"""A script used to revert one or a sequence of consecutive CLs, for svn and
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git-svn users.
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"""
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def parse_args():
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parser = optparse.OptionParser()
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parser.add_option('--revisions', '-r', dest='rev_range', action='store',
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default=None, help='The revision number(s) of the commits '
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'you wish to undo. An individual number, or a range (8-10, '
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'8..10, or 8:10).')
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args, _ = parser.parse_args()
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revision_range = args.rev_range
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if revision_range == None:
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maybe_fail('You must specify at least one revision number to revert.')
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if revision_range.find('-') > -1 or revision_range.find(':') > -1 or \
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revision_range.find('..') > -1:
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# We have a range of commits to revert.
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split = revision_range.split('-')
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if len(split) == 1:
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split = revision_range.split(':')
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if len(split) == 1:
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split = revision_range.split('..')
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start = int(split[0])
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end = int(split[1])
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if start > end:
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temp = start
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start = end
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end = temp
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if start != end:
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maybe_fail('Warning: Are you sure you want to revert a range of '
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'revisions? If you just want to revert one CL, only specify '
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'one revision number.', user_input=True)
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else:
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start = end = int(revision_range)
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return start, end
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def maybe_fail(msg, user_input=False):
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"""Determine if we have encountered a condition upon which our script cannot
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continue, and abort if so.
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Args:
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- msg: The error or user prompt message to print.
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- user_input: True if we require user confirmation to continue. We assume
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that the user must enter y to proceed.
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"""
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if user_input:
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force = raw_input(msg + ' (y/N) ')
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if force != 'y':
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sys.exit(0)
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else:
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print msg
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sys.exit(1)
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def has_new_code(is_git):
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"""Tests if there are any newer versions of files on the server.
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Args:
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- is_git: True if we are working in a git repository.
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"""
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os.chdir(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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if not is_git:
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results, _ = run_cmd(['svn', 'st'])
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else:
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results, _ = run_cmd(['git', 'status'])
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for line in results.split('\n'):
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if not is_git and (not line.strip().startswith('?') and line != ''):
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return True
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elif is_git and ('Changes to be committed' in line or
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'Changes not staged for commit:' in line):
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return True
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if is_git:
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p = subprocess.Popen(['git', 'log', '-1'], stdout=subprocess.PIPE,
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shell=(platform.system()=='Windows'))
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output, _ = p.communicate()
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if find_git_info(output) == None:
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return True
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return False
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def run_cmd(cmd_list, suppress_output=False, std_in=''):
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"""Run the specified command and print out any output to stdout."""
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print ' '.join(cmd_list)
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p = subprocess.Popen(cmd_list, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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stdin=subprocess.PIPE,
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shell=(platform.system()=='Windows'))
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output, stderr = p.communicate(std_in)
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if output and not suppress_output:
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print output
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if stderr and not suppress_output:
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print stderr
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return (output, stderr)
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def runs_git():
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"""Returns True if we're standing in an svn-git repository."""
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p = subprocess.Popen(['svn', 'info'], stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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shell=(platform.system()=='Windows'))
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output, err = p.communicate()
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if err != None and 'is not a working copy' in err:
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p = subprocess.Popen(['git', 'status'], stdout=subprocess.PIPE,
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shell=(platform.system()=='Windows'))
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output, _ = p.communicate()
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if 'fatal: Not a git repository' in output:
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maybe_fail('Error: not running git or svn.')
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else:
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return True
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return False
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def find_git_info(git_log, rev_num=None):
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"""Determine the latest svn revision number if rev_num = None, or find the
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git commit_id that corresponds to a particular svn revision number.
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"""
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for line in git_log.split('\n'):
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tokens = line.split()
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if len(tokens) == 2 and tokens[0] == 'commit':
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current_commit_id = tokens[1]
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elif len(tokens) > 0 and tokens[0] == 'git-svn-id:':
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revision_number = int(tokens[1].split('@')[1])
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if revision_number == rev_num:
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return current_commit_id
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if rev_num == None:
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return revision_number
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def revert(start, end, is_git):
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"""Revert the sequence of CLs.
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Args:
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- start: The first CL to revert.
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- end: The last CL to revert.
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- is_git: True if we are in a git-svn checkout.
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"""
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if not is_git:
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_, err = run_cmd(['svn', 'merge', '-r', '%d:%d' % (end, start-1), '.'],
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std_in='p')
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if 'Conflict discovered' in err:
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maybe_fail('Please fix the above conflicts before submitting. Then create'
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' a CL and submit your changes to complete the revert.')
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else:
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# If we're running git, we have to use the log feature to find the commit
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# id(s) that correspond to the particular revision number(s).
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output, _ = run_cmd(['git', 'log', '-1'], suppress_output=True)
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current_revision = find_git_info(output)
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distance = (current_revision-start) + 1
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output, _ = run_cmd(['git', 'log', '-%d' % distance], suppress_output=True)
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reverts = [start]
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commit_msg = '"Reverting %d"' % start
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if end != start:
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reverts = range(start, end + 1)
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reverts.reverse()
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commit_msg = '%s-%d"' % (commit_msg[:-1], end)
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for revert in reverts:
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git_commit_id = find_git_info(output, revert)
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if git_commit_id == None:
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maybe_fail('Error: Revision number not found. Is this earlier than your'
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' git checkout history?')
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_, err = run_cmd(['git', 'revert', '-n', git_commit_id])
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if 'error: could not revert' in err or 'unmerged' in err:
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command_sequence = ''
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for revert in reverts:
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git_commit_id = find_git_info(output, revert)
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command_sequence += 'git revert -n %s\n' % git_commit_id
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maybe_fail('There are conflicts while reverting. Please resolve these '
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'after manually running:\n' + command_sequence + 'and then '
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'create a CL and submit to complete the revert.')
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run_cmd(['git', 'commit', '-m', commit_msg])
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def main():
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revisions = parse_args()
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git_user = runs_git()
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if has_new_code(git_user):
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maybe_fail('WARNING: This checkout has local modifications!! This could '
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'result in a CL that is not just a revert and/or you could lose your'
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' local changes! Are you **SURE** you want to continue? ',
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user_input=True)
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if git_user:
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run_cmd(['git', 'cl', 'rebase'])
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run_cmd(['gclient', 'sync'])
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revert(revisions[0], revisions[1], git_user)
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print ('Now, create a CL and submit! The buildbots and your teammates thank '
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'you!')
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if __name__ == '__main__':
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main()
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