docs: def mapping_args(parser):
      """Add various variable mapping command line options to the parser"""
      parser.add_argument('--add-prefix',
                          dest='add_prefix',
                          help='Specify a prefix to use when '
                          'generating secret key names')
      parser.add_argument('--add-suffix',
                          dest='add_suffix',
                          help='Specify a suffix to use when '
                          'generating secret key names')
      parser.add_argument('--merge-path',
                          dest='merge_path',
                          action='store_true',
                          default=True,
                          help='merge vault path and key name')
      parser.add_argument('--no-merge-path',
                          dest='merge_path',
                          action='store_false',
                          default=True,
                          help='do not merge vault path and key name')
      parser.add_argument('--key-map',
                          dest='key_map',
                          action='append',
                          type=str,
                          default=[])