main_url

# File lib/rdoc/generator/html.rb, line 337
  def main_url
    main_page = @options.main_page

    #
    # If a main page has been specified (--main), then search for it
    # in the AllReferences array.  This allows either files or classes
    # to be used for the main page.
    #
    if main_page then
      main_page_ref = RDoc::Generator::AllReferences[main_page]

      if main_page_ref then
        return main_page_ref.path
      else
        $stderr.puts "Could not find main page #{main_page}"
      end
    end

    #
    # No main page has been specified, so just use the README.
    #
    @files.each do |file|
      if file.name =~ /^README/ then
        return file.path
      end
    end

    #
    # There's no README (shame! shame!).  Just use the first file
    # that will be documented.
    #
    @files.each do |file|
      if file.document_self then
        return file.path
      end
    end

    #
    # There are no files to be documented...  Something seems very wrong.
    #
    raise RDoc::Error, "Couldn't find anything to document (perhaps :stopdoc: has been used in all classes)!"
  end