require 'pathname' def ActiveSupport.requirable?(file) $LOAD_PATH.any? { |p| Dir.glob("#{p}/#{file}.*").any? } end [%w(builder 2.1.2), %w(i18n 0.1.3), %w(memcache-client 1.7.5), %w(tzinfo 0.3.15)].each do |lib, version| # If the lib is not already requirable unless ActiveSupport.requirable? lib # Try to activate a gem ~> satisfying the requested version first. begin gem lib, ">= #{version}" # Use the vendored lib if the gem's missing or we aren't using RubyGems. rescue LoadError, NoMethodError # There could be symlinks $LOAD_PATH.unshift Pathname.new(__FILE__).dirname.join("vendor/#{lib}-#{version}/lib").realpath.to_s end end end