Merge "Validates the config lists used by the script."

    return config_file.read().splitlines()

def validate_config_lists(system_item_list, other_item_list):

  """Performs validations on the merge config lists.

  Args:

    system_item_list: The list of items to extract from the partial

    system target files package as is.

    other_item_list: The list of items to extract from the partial

    other target files package as is.

  Returns:

    False if a validation fails, otherwise true.

  """

  default_combined_item_set = set(default_system_item_list)

  default_combined_item_set.update(default_other_item_list)

  combined_item_set = set(system_item_list)

  combined_item_set.update(other_item_list)

  # Check that the merge config lists are not missing any item specified

  # by the default config lists.

  difference = default_combined_item_set.difference(combined_item_set)

  if difference:

    logger.error('Missing merge config items: %s' % list(difference))

    logger.error('Please ensure missing items are in either the '

                 'system-item-list or other-item-list files provided to '

                 'this script.')

    return False

  return True

def process_ab_partitions_txt(

    system_target_files_temp_dir,

    other_target_files_temp_dir,

  else:

    other_item_list = default_other_item_list

  if not validate_config_lists(

      system_item_list=system_item_list,

      other_item_list=other_item_list):

    sys.exit(1)

  call_func_with_temp_dir(

      lambda temp_dir: merge_target_files(

          temp_dir=temp_dir,