Implementation of parser for Python argparse commands arguments, based on help message.

• _arg_prase - parse input arguments

• _arg_get_command_output - get command output
• _arg_output_split - splits command line output to optional/positional/usage parts

• _arg_optional_parse - parse list of arguments
• _arg_optional_arguments_split - split argument to long and short argument
• _arg_optional_argument_split - split long or short argument to name and value

• _arg_value - formats passed arguments to VALUE format string
• _arg_value_parse - parse string value FORMAT

• _arg_sanatize_name convert name to suffix of variable

• Detect positional arguments
• Detect options / optional arguments
  • Match short name
  • Match long name
• Detect subcommands
• Extract positional arguments
• Extract optional
• Prase input in style of cmake_parse_arguments
• Parse usage to get number of arguments
• Bug: Wrong detection of -nr, --no-remote
• Name fallback should always choose long name (if present)
• Set narg when optional value is flag
• Parse positional arguments
• Verify choice values
• _arg_is_value - should check if -3.14 is passed correctly as value

Script can detect usage of: '+', '?', '*', 0, n arguments It cannot detect action being used: 'store', 'count' for this reason all values will be added to the list.

Scrit can parse custom arguments parsers:

• positional arguments

• optional arguments and it value

  • must be in single line

• optional arguments:

  • short name must match regex -[a-z:-]+
  • long name must match regex --[a-z:-]+ regex
  • short and long options must be separated by , literal

• optional argument help will be separated by at least two spaces ' ' literal.

• optional argument values:

  • value name must match regex [A-Z_]+ - for basic value
  • value name must match regex {[A-Z_]+(,[A-Z_]+)*} - for chocice list
  • common styles:
    • [NAME] - will denote optional value, only last
      argument will be stored example: --arg-star A will store list "A" example: --arg-star A --arg-star B will store "B" example: --arg-star will store "" nargs type ?
    • [NAME ...] - will denote optional value that can be a list, only last
      argument will be stored example: --arg-star A B C will store list "A;B;C" example: --arg-star A B C --arg-star D will store "D" example: --arg-star will store "" nargs type *
    • NAME [NAME ...] - will denote at leas one value in list, only last argument will be stored example: --arg-plus A B C will store list "A;B;C" example: --arg-plus A B C --arg-star D will store "D" example: --arg-star A will store "A" nargs type +
    • NAME - will denote single required value example: --arg-num1 A will store list "A" example: --arg-num1 A --arg-num1 B will store list "B" nargs type 1
    • NAME NAME - or any other number will require 2 values example: --arg-num2 A B will store list "A;B" example: --arg-num2 A B --arg-num2 C D will store list "C;D" nargs type 2 bigger number will require denoted number of values

  -h, --help show this help message and exit --all --id ID [ID ...] -s SKIP, --skip SKIP -l LIMIT, --limit LIMIT

Options can be passed as: -v 10 --verbose 10 -v=10 --verbose=10

If short option is exactly 2 letters long value can be passed directly after option: -v10

Value after set value cannot start from with "-".

Setting is fully valid sets none/empty string as argument -v= --verbose=