#!/usr/bin/env nomsu -V7.0.0
###
    A library defining some command line program functionality
    
external:
    (command line program with $args $body) parses as:
        external ((run with $args) means $body)
        if (this file was run directly):
            run with (the command line arguments)
    
    (usage $) means:
        say "Usage: \$"
        exit 1