#!/usr/bin/env python
# Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

"""Tool for listing Dart source files.

Usage:
  python tools/list_dart_files.py <directory> <root directory pattern>
"""

import os
import re
import sys


def main(argv):
  directory = argv[1]

  pattern = None
  if len(argv) > 2:
    pattern = re.compile(argv[2])

  for root, directories, files in os.walk(directory):
    # We only care about actual source files, not generated code or tests.
    for skip_dir in ['.git', 'gen', 'test']:
      if skip_dir in directories:
        directories.remove(skip_dir)

    # If we are looking at the root directory, filter the immediate
    # subdirectories by the given pattern.
    if pattern and root == directory:
      directories[:] = filter(pattern.match, directories)

    for filename in files:
      if filename.endswith('.dart') and not filename.endswith('_test.dart'):
        fullname = os.path.relpath(os.path.join(root, filename))
        fullname = fullname.replace(os.sep, '/')
        print fullname


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