#!ruby -an BEGIN { require 'fileutils' dir = ARGV.shift ARGF.eof? FileUtils.mkdir_p(dir) Dir.chdir(dir) } n, v, u = $F case n when "minitest" v = "master" when "test-unit" else v = "v" + v end if File.directory?(n) puts "updating #{n} ..." system(*%W"git fetch", chdir: n) or abort else puts "retrieving #{n} ..." system(*%W"git clone #{u} #{n}") or abort end system(*%W"git checkout #{v}", chdir: n) or abort