# File sprout/lib/sprout/tasks/tool_task.rb, line 532
    def prepare_preprocessor_path(path)
      processed_path = cleaned_preprocessed_path(path)
      FileUtils.mkdir_p(processed_path)
      files = FileList[path + file_expression]
      files.each do |input_file|
        prepare_preprocessor_file(input_file)
      end
      
      return processed_path
    end