#!/usr/bin/env ruby app_root = 'sandbox' unless File.exist? "#{app_root}/bin/rails" warn 'Creating the sandbox app...' Dir.chdir "#{__dir__}/.." do system "#{__dir__}/sandbox" or begin warn 'Automatic creation of the sandbox app failed' exit 1 end end end Dir.chdir app_root exec 'bin/rails', *ARGV