class Gem::RDoc

def generate
  return unless @generate_ri or @generate_rdoc
  setup
  options = nil
  if Gem::Requirement.new('< 3').satisfied_by? self.class.rdoc_version then
    generate_legacy
    return
  end
  ::RDoc::TopLevel.reset # TODO ::RDoc::RDoc.reset
  ::RDoc::Parser::C.reset
  args = @spec.rdoc_options
  args.concat @spec.source_paths
  args.concat @spec.extra_rdoc_files
  case config_args = Gem.configuration[:rdoc]
  when String then
    args = args.concat config_args.split
  when Array then
    args = args.concat config_args
  end
  delete_legacy_args args
  Dir.chdir @spec.full_gem_path do
    options = ::RDoc::Options.new
    options.default_title = "#{@spec.full_name} Documentation"
    options.parse args
  end
  options.quiet = !Gem.configuration.really_verbose
  @rdoc = new_rdoc
  @rdoc.options = options
  say "Parsing documentation for #{@spec.full_name}"
  Dir.chdir @spec.full_gem_path do
    @file_info = @rdoc.parse_files options.files
  end
  document 'ri',       options, @ri_dir if
    @generate_ri   and (@force or not File.exist? @ri_dir)
  document 'darkfish', options, @rdoc_dir if
    @generate_rdoc and (@force or not File.exist? @rdoc_dir)
end