exec_task_traverse

# File actionwebservice/setup.rb, line 1325
  def exec_task_traverse(task)
    run_hook "pre-#{task}"
    FILETYPES.each do |type|
      if config('without-ext') == 'yes' and type == 'ext'
        $stderr.puts 'skipping ext/* by user option' if verbose?
        next
      end
      traverse task, type, "#{task}_dir_#{type}"
    end
    run_hook "post-#{task}"
  end