class Sprockets::SassCompressor

def call(input)
  css, map = Autoload::Sass::Engine.new(
    input[:data],
    @options.merge(filename: input[:filename])
  ).render_with_sourcemap('')
  css = css.sub("/*# sourceMappingURL= */\n", '')
  map = SourceMapUtils.format_source_map(JSON.parse(map.to_json(css_uri: '')), input)
  map = SourceMapUtils.combine_source_maps(input[:metadata][:map], map)
  { data: css, map: map }
end