require "formula" class Ruby19Dependency < Requirement fatal true default_formula "ruby" satisfy do `ruby --version` =~ /ruby (\d\.\d).\d/ $1.to_f >= 1.9 end def message "Betty requires Ruby 1.9 or better." end end class Betty < Formula homepage "https://github.com/pickhardt/betty" url "https://github.com/pickhardt/betty/archive/v0.1.6.tar.gz" sha1 "bd838caa8d596598f406209609f39a7bd5087ac1" depends_on Ruby19Dependency def install libexec.install "lib", "main.rb" => "betty" bin.write_exec_script libexec/"betty" end test do system bin/"betty", "speech on" system bin/"betty", "what is your name" system bin/"betty", "version" system bin/"betty", "speech off" end end