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# 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:])
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