Thor is a simple and efficient tool for building self-documenting command line utilities. It removes the pain of parsing command line options, writing "USAGE:" banners, and can also be used as an alternative to the Rake build tool. The syntax is Rake-like, so it should be familiar to most Rake users.
gem install thor
Please see the wiki for basic usage and other documentation on using Thor. You can also checkout the official homepage.
Released under the MIT License. See the LICENSE file for further details.