#!/usr/bin/env ruby # -*- coding: utf-8 -*- def underscore(camel_cased_word) camel_cased_word.to_s. gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2'). gsub(/([a-z\d])([A-Z])/,'\1_\2'). tr("-", "_"). downcase end name = underscore(ARGV[0]) field_name = name.upcase puts "public static final String #{field_name} = \"#{name}\";"