clasp-ruby

https://github.com/synesissoftware/CLASP.Ruby

Command-Line Argument Sorting and Parsing library that provides a powerful abstraction of command-line interpretation facilities. CLASP.Ruby is a Ruby port of the popular CLASP (C/C++) library, and provides declarative specification of command-line flags and options, aliasing, flag combination, UNIX de-facto standard flag processing, and a number of utility functions for expressing usage and version information.