parser.add_argument('build_log',
                      help='Path to a build log.')
  parser.add_argument('--xml-out-path',
                      required=False,
                      help='Path to which to output '
                           'the JUnit-based XML with ResultStore links.')
  parser.add_argument('--print',
                      action='store_true', dest='print', default=False,

    var_default: (String) default value string.
    ask_for_var: (String) string for how to ask for user input.
    check_success: (Function) function that takes one argument and returns a
      boolean. Should return True if the value provided is considered valid. May
      contain a complex error message if error_msg does not provide enough