libnotify within sfTask

gistfile1.aw

I only needed notification in one long running task with multiple sfTasks called inside.
So I added a 'notify' option and put the following code in the beginning of my execute() method :

    if ($options['notify'])
    {
      try
      {
        $fs = new sfFilesystem();
        $fs->execute('which notify-send');

        $this->configuration->getEventDispatcher()->connect('command.post_command', array($this, 'listenToCommandPostCommand'));
      }
      catch(Exception $e)
      {
        // Pas de notification avec libnotify, pas grave
      }
    }

And here is my listenToCommandPostCommand method :
  /**
   * @param sfEvent $event
   */
  public function listenToCommandPostCommand(sfEvent $event)
  {
    try
    {
      $fs = new sfFilesystem();
      $task = $event->getSubject();
      $cmd = sprintf("notify-send 'My project' %s", escapeshellarg(sprintf("Task %s finished", $task->getFullName())));
      $fs->execute($cmd);
    }
    catch(Exception $e)
    {
    }
  }