FailsafePackageManager.php

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<?php
namespace TYPO3\CMS\Core\Package;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

class FailsafePackageManager extends PackageManager
{
    protected $inFailsafeMode = false;

    protected function loadPackageStates()
    {
        try {
            parent::loadPackageStates();
        } catch (Exception\PackageStatesUnavailableException $exception) {
            $this->inFailsafeMode = true;
            $this->packageStatesConfiguration = [];
            $this->scanAvailablePackages();
        }
    }

    protected function sortAndSavePackageStates()
    {
        // Do not save if in rescue mode
        if (!$this->inFailsafeMode) {
            parent::sortAndSavePackageStates();
        }
    }

    public function forceSortAndSavePackageStates()
    {
        parent::sortAndSavePackageStates();
    }
}