A high-level IO library that provides validation, type conversion, and more for command-line interfaces. HighLine also includes a complete menu system that can crank out anything from simple list selection to complete shells with just minutes of work.
The getopt library provides two different command line option parsers. They are meant as easier and more convenient replacements for the command line parsers that ship as part of the Ruby standard library. Please see the README for additional comments.
The complete solution for Ruby command-line executables. Commander bridges the gap between other terminal related libraries you know and love (OptionParser, HighLine), while providing many new features, and an elegant API.
Methadone provides a lot of small but useful features for developing a command-line app, including an opinionated bootstrapping process, some helpful cucumber steps, and some classes to bridge logging and output into a simple, unified, interface
Trollop is a commandline option parser for Ruby that just gets out of your way. **DEPRECATION** This gem has been renamed to optimist and will no longer be supported. Please switch to optimist as soon as possible.
Isn't it awesome how `optparse` and other option parsers generate help and usage-messages based on your code?! Hell no! You know what's awesome? It's when the option parser *is* generated based on the help and usage-message that you write in a docstring! That's what docopt does!
This is an lightweight option parser, which is less than 80 lines short. It has strong validations and a short, clear and easy to use syntax. Feel free to copy all 80 lines (55 lines without validations / empty lines) into your script rather installing the gem.