OptionGrouper

Command line option parsing, inspired by trollop, in an unusual way.

Quick intro

Options are grouped into groups, you can define the same option in more than one group. In this case, you can use a --group:option syntax on the command line.

The default group (:default, also used when you do not specify a name) is a bit special, as you do not need to prefix commands in this group.

require 'optiongrouper'

opts = OptionGrouper.new do
  version "My Program 1.0"
  header "\nUsage:\n  my_program [options]\n\n"

  group do
    opt :debug, "Enable debugging"
  end

  group :debug do
    header "Debugging options"
    opt :level, "Set debug level", :value => :integer, :default => 0
    opt :kill, "Kill the process <PID> with signal <SIGNAL>", :value =>
      [[:integer, "PID"], [:integer, "SIGNAL"]]
  end
end.parse

# opts[:default][:debug] is true if --debug was passed on command line
# opts[:debug][:kill] contains an array with [PID, SIGNAL]
# etc

Hope you get the idea now.

Contributing to optiongrouper

Copyright © 2010 Kővágó, Zoltán. See LICENSE.txt for further details.