ruby (FileUtils)

         # File lib/rake.rb, line 738
    738:   def ruby(*args,&block)
    739:     if Hash === args.last
    740:       options = args.pop
    741:     else
    742:       options = {}
    743:     end
    744:     if args.length > 1 then
    745:       sh(*([RUBY] + args + [options]), &block)
    746:     else
    747:       sh("#{RUBY} #{args}", options, &block)
    748:     end
    749:   end