new_contents: # Copyright 2015 MongoDB, 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.
  
  """Usage: mut-images
  
  -h --help  - show this
  
  """
  
  import logging
  import multiprocessing
  
  import docopt
  
  from typing import Any, Dict
  
  import mut
  import mut.main
  import mut.images
  
  logger = logging.getLogger(__name__)
  
  
  def main():
      options = docopt.docopt(__doc__)
      logging.basicConfig(level=logging.INFO)
  
      config = mut.RootConfig('.')
      config.n_workers = multiprocessing.cpu_count()
  
      collector = mut.main.FileCollector()
      collector.walk(config.source_path, ['images'])
      mut.images.run_build_images(config, collector.get_prefixes(['images']))
  
  if __name__ == '__main__':
      main()
  
subject: Add missing build_images.py