optimist

http://manageiq.github.io/optimist/

Documentation

Quickstart: See Optimist.options and then Optimist::Parser#opt.
Examples: http://manageiq.github.io/optimist/.
Wiki: http://github.com/ManageIQ/optimist/wiki

Description

Optimist 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.

Requirements

A burning desire to write less code.

Install

gem install optimist

Synopsis

require 'optimist'
opts = Optimist::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 }

License

Optimist is released under the MIT License.

okuramasafumi/optimist