commander-example.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'commander'

program :version, '0.0.1'
program :description, 'Does some foo'

global_option '-c', '--config FILE', 'Load configuration'

command :bar do |c|
  c.syntax = 'foo bar [options]'
  c.when_called do |args, options|
    p options.config
  end
end

# $ ./foo bar --config somepath
# => "somepath"