class SassC::Engine

def post_process_source_map(source_map)
  return unless source_map
  data = JSON.parse(source_map)
  source_map_dir = File.dirname(source_map_file || '')
  data['file'] = Util::URI_PARSER.escape(relative_path(source_map_dir, output_path)) if output_path
  data['sources'].map! do |source|
    if source.start_with?('file:')
      relative_path(source_map_dir, Util.file_url_to_path(source))
    else
      source
    end
  end
  JSON.generate(data)
end