class Sprockets::Secretary

def add_source_files(source_files, options = {})
  expand_paths(source_files, options).each do |source_file|
    if pathname = environment.find(source_file)
      preprocessor.require(pathname.source_file)
    else
      raise Sprockets::LoadError, "no such file `#{source_file}'"
    end
  end
end