require 'bundler' Bundler::GemHelper.install_tasks specname = "arel.gemspec" deps = `git ls-files`.split("\n") - [specname] file specname => deps do files = `git ls-files`.split("\n") - ["#{specname}.erb"] require 'erb' File.open specname, 'w:utf-8' do |f| f.write ERB.new(File.read("#{specname}.erb")).result(binding) end end