From: mathew <meta@...>
Date: 2005-12-17T06:52:45+09:00
Subject: Re: GetoptLong example <SOLVED>

Steve Litt wrote:
> def usage()
> 	puts "Usage:"
> 	puts "myprog [--help] [--short optional_arg] [--offset 
> required_arg]"
> end

Handy hint: use RDoc::usage

e.g.

#!/usr/bin/ruby

# == Synopsis
#
# What the program does
#
# == Usage
#
#   progname [ -h | --help ] [ --arg1 val1 | -a val1 ] [ --flag ] arg
#
# arg:
#   The thing to do stuff to.
#
# val1:
#   An optional value.
#
# --flag makes the program do something else.
#
# == Author
# Your Name Here (mailto:you@example.com)
#
# == Copyright
# Copyright (c) 2005 Your Name. Licensed under the same terms as Ruby.

require 'getoptlong'
require 'rdoc/usage'

opts = GetoptLong.new(
   [ '--help', '-h', GetoptLong::NO_ARGUMENT ],
   [ '--flag', '-f', GetoptLong::NO_ARGUMENT ],
   [ '--arg1', '-a', GetoptLong::REQUIRED_ARGUMENT ]
)

@flag = false
@arg1 = nil
opts.each do |opt, arg|
   case opt
     when '--help'
       RDoc::usage
     when '--flag'
       @flag = true
     when '--val1'
       @arg1 = arg
     else
       puts "Unrecognized option #{opt} (try --help)"
       exit 0
   end
end


mathew
-- 
       <URL:http://www.pobox.com/~meta/>
My parents went to the lost kingdom of Hyrule
     and all I got was this lousy triforce.