Recursively change uid/gid according a map of old to new uid/gid

change-uid-gid.py

#!/usr/bin/env python

from __future__ import print_function
import os
import sys

UID_MAP = {
  # OLD_UID: NEW_UID
}

GID_MAP = {
  # OLD_GID: NEW_GID
}

def _progress(count, total, status=''):
    bar_len = 60
    filled_len = int(round(bar_len * count / float(total)))
    bar = '=' * filled_len + '-' * (bar_len - filled_len)
    sys.stdout.write('[%s] %s/%s\r' % (bar, count+1, total))
    sys.stdout.flush()  # As suggested by Rom Ruben (see: http://stackoverflow.com/questions/3173320/text-progress-bar-in-the-console/27871113#comment50529068_27871113)


def _chown(path):
    s = os.stat(path)
    new_uid = UID_MAP.get(s.st_uid, s.st_uid)
    new_gid = GID_MAP.get(s.st_gid, s.st_gid)
    os.chown(path, new_uid, new_gid)

if __name__ == "__main__":
    if len(sys.argv) <= 1:
        print("Missing path argument")
        exit(-1)

    print("Compute files and subdirectories list")
    paths = []
    for path, subdirs, files in os.walk(sys.argv[1]):
        for subd in subdirs:
            paths.append(os.path.join(path,subd))
        for name in files:
            paths.append(os.path.join(path, name))

    total_paths = len(paths)
    print("Found {} paths to chown".format(total_paths))

    print("Chowning ...")
    for i, p in enumerate(paths):
        _progress(i, total_paths)
        _chown(p)

    print("\nDone")