trollop

by William Morgan (http://masanjin.net/)

Rubyforge page: https://rubygems.org/gems/trollop

Release announcements and comments: http://masanjin.net/blog/label/trollop/

Documentation: http://www.rubydoc.info/gems/trollop/2.0/Trollop

DESCRIPTION

Trollop is a commandline option parser for Ruby that just gets out of your way. One line of code per option is all you need to write. For that, you get a nice automatically-generated help page, robust option parsing, and sensible defaults for everything you don't specify.

FEATURES

Dirt-simple usage.
Single file. Throw it in lib/ if you don't want to make it a Rubygem dependency.
Sensible defaults. No tweaking necessary, much tweaking possible.
Support for long options, short options, subcommands, and automatic type validation and conversion.
Automatic help message generation, wrapped to current screen width.
Lots of unit tests.

REQUIREMENTS

A burning desire to write less code.

INSTALL

Add this line to your application's Gemfile:

gem 'trollop'

then run:

bundle install

Or install it yourself as:

$ gem install trollop

SYNOPSIS

  require 'trollop'
  opts = Trollop::options do
    opt :monkey, "Use monkey mode"                    # flag --monkey, default false
    opt :name, "Monkey name", :type => :string        # string --name <s>, default nil
    opt :num_limbs, "Number of limbs", :default => 4  # integer --num-limbs <i>, default to 4
  end

  p opts # a hash: { :monkey=>false, :name=>nil, :num_limbs=>4, :help=>false }