def options
  @options ||= OptionParser.new do |o|
    o.banner = "Test::Unit automatic runner."
    o.banner << "\nUsage: #{$0} [options] [-- untouched arguments]"
    o.on
    o.on('-r', '--runner=RUNNER', RUNNERS,
         "Use the given RUNNER.",
         "(" + keyword_display(RUNNERS) + ")") do |r|
      @runner = r
    end
    if(@standalone)
      o.on('-b', '--basedir=DIR', "Base directory of test suites.") do |b|
        @base = b
      end
      o.on('-w', '--workdir=DIR', "Working directory to run tests.") do |w|
        @workdir = w
      end
      o.on('-a', '--add=TORUN', Array,
           "Add TORUN to the list of things to run;",
           "can be a file or a directory.") do |a|
        @to_run.concat(a)
      end
      @pattern = []
      o.on('-p', '--pattern=PATTERN', Regexp,
           "Match files to collect against PATTERN.") do |e|
        @pattern << e
      end
      @exclude = []
      o.on('-x', '--exclude=PATTERN', Regexp,
           "Ignore files to collect against PATTERN.") do |e|
        @exclude << e
      end
    end
    o.on('-n', '--name=NAME', String,
         "Runs tests matching NAME.",
         "(patterns may be used).") do |n|
      n = (%r{\A/(.*)/\Z} =~ n ? Regexp.new($1) : n)
      case n
      when Regexp
        @filters << proc{|t| n =~ t.method_name ? true : nil}
      else
        @filters << proc{|t| n == t.method_name ? true : nil}
      end
    end
    o.on('-t', '--testcase=TESTCASE', String,
         "Runs tests in TestCases matching TESTCASE.",
         "(patterns may be used).") do |n|
      n = (%r{\A/(.*)/\Z} =~ n ? Regexp.new($1) : n)
      case n
      when Regexp
        @filters << proc{|t| n =~ t.class.name ? true : nil}
      else
        @filters << proc{|t| n == t.class.name ? true : nil}
      end
    end
    o.on('-I', "--load-path=DIR[#{File::PATH_SEPARATOR}DIR...]",
         "Appends directory list to $LOAD_PATH.") do |dirs|
      $LOAD_PATH.concat(dirs.split(File::PATH_SEPARATOR))
    end
    o.on('-v', '--verbose=[LEVEL]', OUTPUT_LEVELS,
         "Set the output level (default is verbose).",
         "(" + keyword_display(OUTPUT_LEVELS) + ")") do |l|
      @output_level = l || UI::VERBOSE
    end
    o.on('--',
         "Stop processing options so that the",
         "remaining options will be passed to the",
         "test."){o.terminate}
    o.on('-h', '--help', 'Display this help.'){puts o; exit}
    o.on_tail
    o.on_tail('Deprecated options:')
    o.on_tail('--console', 'Console runner (use --runner).') do
      warn("Deprecated option (--console).")
      @runner = RUNNERS[:console]
    end
    o.on_tail('--gtk', 'GTK runner (use --runner).') do
      warn("Deprecated option (--gtk).")
      @runner = RUNNERS[:gtk]
    end
    o.on_tail('--fox', 'Fox runner (use --runner).') do
      warn("Deprecated option (--fox).")
      @runner = RUNNERS[:fox]
    end
    o.on_tail
  end
end