import os
import sys

EXCLUDE_FILES = ['.DS_Store']
EXCLUDE_DIRS = ['.git', '.hg']

def inheritMTime(path):
    for root, dirs, files in os.walk(path, topdown=False, followlinks=False):
        currentMaxMtime = None
        for subpath in files:
            if subpath in EXCLUDE_FILES:
                print "ignore file", os.path.join(root, subpath)
                continue
            currentMaxMtime = max(currentMaxMtime, os.lstat(os.path.join(root, subpath)).st_mtime)
        for subpath in dirs:
            if subpath in EXCLUDE_DIRS:
                print "ignore dir", os.path.join(root, subpath)
                continue
            currentMaxMtime = max(currentMaxMtime, os.lstat(os.path.join(root, subpath)).st_mtime)
        if currentMaxMtime is not None:
            os.utime(root, (currentMaxMtime, currentMaxMtime))

if __name__ == "__main__":
    for dir in os.listdir(sys.argv[1]):
        if os.path.isdir(dir):
            current = os.path.join(sys.argv[1], dir)
            inheritMTime(current)