# File lib/compass/compiler.rb, line 149
    def engine(sass_filename, css_filename)
      syntax = (sass_filename =~ /\.(s[ac]ss)$/) && $1.to_sym || :sass
      opts = sass_options.merge(:filename => sass_filename, :css_filename => css_filename, :syntax => syntax)
      Sass::Engine.new(open(sass_filename).read, opts)
    end