def call(input)
      context = input[:environment].context_class.new(input)

      engine_options = merge_options({
        filename: input[:filename],
        syntax: self.class.syntax,
        cache_store: build_cache_store(input, @cache_version),
        load_paths: context.environment.paths.map { |p| @importer_class.new(p.to_s) },
        importer: @importer_class.new(Pathname.new(context.filename).to_s),
        sprockets: {
          context: context,
          environment: input[:environment],
          dependencies: context.metadata[:dependencies]
        }
      })

      engine = Autoload::Sass::Engine.new(input[:data], engine_options)

      css, map = Utils.module_include(Autoload::Sass::Script::Functions, @functions) do
        engine.render_with_sourcemap('')
      end

      css = css.sub("\n/*# sourceMappingURL= */\n", '')

      map = SourceMapUtils.format_source_map(JSON.parse(map.to_json(css_uri: '')), input)
      map = SourceMapUtils.combine_source_maps(input[:metadata][:map], map)

      # Track all imported files
      sass_dependencies = Set.new([input[:filename]])
      engine.dependencies.map do |dependency|
        sass_dependencies << dependency.options[:filename]
        context.metadata[:dependencies] << URIUtils.build_file_digest_uri(dependency.options[:filename])
      end

      context.metadata.merge(data: css, sass_dependencies: sass_dependencies, map: map)
    end
def call(input)
      context = input[:environment].context_class.new(input)

      engine_options = merge_options({
        filename: input[:filename],
        syntax: self.class.syntax,
        cache_store: build_cache_store(input, @cache_version),
        load_paths: context.environment.paths.map { |p| @importer_class.new(p.to_s) },
        importer: @importer_class.new(Pathname.new(context.filename).to_s),
        sprockets: {
          context: context,
          environment: input[:environment],
          dependencies: context.metadata[:dependencies]
        }
      })

      engine = Autoload::Sass::Engine.new(input[:data], engine_options)

      css, map = Utils.module_include(Autoload::Sass::Script::Functions, @functions) do
        engine.render_with_sourcemap('')
      end

      css = css.sub("\n/*# sourceMappingURL= */\n", '')

      map = SourceMapUtils.format_source_map(JSON.parse(map.to_json(css_uri: '')), input)
      map = SourceMapUtils.combine_source_maps(input[:metadata][:map], map)

      # Track all imported files
      sass_dependencies = Set.new([input[:filename]])
      engine.dependencies.map do |dependency|
        sass_dependencies << dependency.options[:filename]
        context.metadata[:dependencies] << URIUtils.build_file_digest_uri(dependency.options[:filename])
      end

      context.metadata.merge(data: css, sass_dependencies: sass_dependencies, map: map)
    end
Public: Initialize template with custom options.

 options - Hash
 cache_version - String custom cache version. Used to force a cache
                 change after code changes are made to Sass Functions.