text: #!/usr/bin/env python3
  
  # 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.
  
  import argparse
  import logging
  import sys
  import yaml
  
  
  def parse_args():
      p = argparse.ArgumentParser()
      p.add_argument('input', nargs='*')
      return p.parse_args()
  
  
  def main():
      args = parse_args()
      logging.basicConfig()
      res = 0
  
      for filename in args.input:
          with open(filename) as fd:
              try:
                  yaml.safe_load(fd)
              except yaml.error.YAMLError as error:
                  res = 1
                  logging.error('%s failed validation: %s',
                                filename, error)
  
      sys.exit(res)
  
  if __name__ == '__main__':
      main()
  