config/rebuild_check.py
author Wes Kocher <wkocher@mozilla.com>
Wed, 07 Sep 2016 14:22:21 -0700
changeset 312974 ab70808cd4b6c6ad9a57a9f71cfa495fcea0aecd
parent 142774 0e91dc91caf177531722ee33ef74da6ad1d664d2
child 419598 fba6f974041a3d3c22ef95c44f6e4262e8e5c52f
permissions -rw-r--r--
Backed out 2 changesets (bug 1283919) for being the wrong way to fix this a=backout Backed out changeset a328778db08d (bug 1283919) Backed out changeset 7e1f25f59298 (bug 1283919)

# 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:])