argy-bargy: A fancy argument parsing library

[pyrmont]

Argy-Bargy is a new argument parsing library for Janet. Here's a taste:

(import argy-bargy)

(def rules
  ["--foo" {:kind :single
            :help "The option foo takes a single value."}
   "--bar" {:kind :flag
            :help "The option bar is a flag."}
   :srcs {:help "The source files for the program."
          :rest true}])

(def info
  {:about "A program that does something to the SRCS parameters."
   :rider "For more information, visit our website at example.com/program."})

(argy-bargy/parse rules info)

If that was called in a situation where the :args is ["example" "--help"], the following will be output to stdout:

usage: example [OPTION]... [SRCS...]

A program that does something to the SRCS parameters.

 SRCS    The source files for the program.

 Optional:
      --bar          The option bar is a flag.
      --foo VALUE    The option foo takes a single value.
  -h, --help         Show this help message.

For more information, visit our website at example.com/program.

There are still rough edges so please don't hesitate to open an issue if you discover something not working correctly. More information is available in the repository.