/**
  * @see Action::execute()
  */
 public function execute()
 {
     // call execute event
     parent::execute();
     if ($this->source->enableCheckout && $this->checkoutRepository) {
         // load scm driver
         $className = ucfirst(Source::validateSCM($this->source->scm));
         // check out repository
         require_once WCF_DIR . 'lib/system/scm/' . $className . '.class.php';
         call_user_func(array($className, 'checkout'), $this->source->url, $this->source->sourceDirectory, array('username' => $this->source->username, 'password' => $this->source->password));
         // set revision
         $revision = $this->source->getHeadRevision();
         $this->source->update(null, null, null, null, null, null, null, $revision);
     }
     // rebuild package data if requested
     if ($this->rebuildPackageData) {
         require_once PB_DIR . 'lib/system/package/PackageHelper.class.php';
         PackageHelper::readPackages($this->source);
     }
     // call executed event
     $this->executed();
     // forward
     HeaderUtil::redirect('index.php?page=SourceView&sourceID=' . $this->source->sourceID . SID_ARG_2ND_NOT_ENCODED);
     exit;
 }