expand-symlinks.py

#!/usr/bin/python2.4
# -*- coding: utf-8 -*-
#
# Copyright (C) 2010 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Copy files from source to dest expanding symlinks along the way.
"""

from shutil import copytree

import gflags
import sys


FLAGS = gflags.FLAGS

# Ignore these files and directories when copying over files into the snapshot.
IGNORE = set(['.hg', 'httplib2', 'oauth2', 'simplejson', 'static', 'gflags.py',
                      'gflags_validators.py'])

# In addition to the above files also ignore these files and directories when
# copying over samples into the snapshot.
IGNORE_IN_SAMPLES = set(['apiclient', 'oauth2client', 'uritemplate'])


gflags.DEFINE_string('source', '.', 'Directory name to copy from.')
gflags.DEFINE_string('dest', 'snapshot', 'Directory name to copy to.')


def _ignore(path, names):
  retval = set()
  if path != '.':
    retval = retval.union(IGNORE_IN_SAMPLES.intersection(names))
  retval = retval.union(IGNORE.intersection(names))
  return retval


def main(argv):
  # Let the gflags module process the command-line arguments
  try:
    argv = FLAGS(argv)
  except gflags.FlagsError, e:
    print '%s\\nUsage: %s ARGS\\n%s' % (e, argv[0], FLAGS)
    sys.exit(1)

  copytree(FLAGS.source, FLAGS.dest, symlinks=True,
            ignore=_ignore)


if __name__ == '__main__':
  main(sys.argv)