#!/usr/bin/env ruby
#
#  Created on 2008-4-12.
#  Copyright (c) 2008. All rights reserved.
 
begin
  require 'rubygems'
rescue LoadError
  # no rubygems to load, so we fail silently
end
 
require 'optparse'
 
# NOTE: the option -p/--path= is given as an example, and should probably be replaced in your application.
 
OPTIONS = {
  :path     => '~'
}
MANDATORY_OPTIONS = %w(  )
 
parser = OptionParser.new do |opts|
  opts.banner = <<BANNER
This application is wonderful because...
 
Usage: #{File.basename($0)} [options]
 
Options are:
BANNER
  opts.separator ""
  opts.on("-p", "--path=PATH", String,
          "The root path for selecting files",
          "Default: ~") { |OPTIONS[:path]| }
  opts.on("-h", "--help",
          "Show this help message.") { puts opts; exit }
  opts.parse!(ARGV)
 
  if MANDATORY_OPTIONS && MANDATORY_OPTIONS.find { |option| OPTIONS[option.to_sym].nil? }
    puts opts; exit
  end
end
 
path = OPTIONS[:path]
 
# do stuff