#!/usr/bin/python
# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# 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.
# ==============================================================================
#
# Test that checks if we have any issues with case insensitive filesystems.

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import os

BASE_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), '../..'))
ERROR_MESSAGE = """
Files with same name but different case detected in directory: {}
"""


def main():
  # Make sure BASE_DIR ends with tensorflow.  If it doesn't, we probably
  # computed the wrong directory.
  if os.path.split(BASE_DIR)[-1] != 'tensorflow':
    raise AssertionError(
        "BASE_DIR = '%s' doesn't end with tensorflow" % BASE_DIR)

  for dirpath, dirnames, filenames in os.walk(BASE_DIR, followlinks=True):
    lowercase_directories = [x.lower() for x in dirnames]
    lowercase_files = [x.lower() for x in filenames]

    lowercase_dir_contents = lowercase_directories + lowercase_files
    if len(lowercase_dir_contents) != len(set(lowercase_dir_contents)):
      raise AssertionError(ERROR_MESSAGE.format(dirpath))


if __name__ == '__main__':
  main()