config/rebuild_check.py
author Jon Coppeard <jcoppeard@mozilla.com>
Sat, 17 Nov 2018 13:48:18 +0000
changeset 446919 764c5b94a3950791427e782e59e3e826921cffac
parent 419599 da3c81f986fa63b42a2874b1791eddcdbfbe8424
child 481687 9c5b3c7e1ca2240f765d62466cc917ad778407ef
permissions -rw-r--r--
Bug 1506798 - Fix possible data race updating scope object during compacting GC r=pbone

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import os
import errno


def mtime(path):
    try:
        return os.stat(path).st_mtime
    except OSError as e:
        if e.errno == errno.ENOENT:
            return -1
        raise


def rebuild_check(args):
    target = args[0]
    deps = args[1:]
    t = mtime(target)
    if t < 0:
        print(target)
        return

    newer = []
    removed = []
    for dep in deps:
        deptime = mtime(dep)
        if deptime < 0:
            removed.append(dep)
        elif mtime(dep) > t:
            newer.append(dep)

    if newer and removed:
        print('Rebuilding %s because %s changed and %s was removed' % (
            target, ', '.join(newer), ', '.join(removed)))
    elif newer:
        print('Rebuilding %s because %s changed' % (target, ', '.join(newer)))
    elif removed:
        print('Rebuilding %s because %s was removed' % (
            target, ', '.join(removed)))
    else:
        print('Rebuilding %s for an unknown reason' % target)


if __name__ == '__main__':
    import sys
    rebuild_check(sys.argv[1:])