FailsafePackageManager.php

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

use TYPO3\CMS\Core\Utility\GeneralUtility;

class FailsafePackageManager extends \TYPO3\CMS\Core\Package\PackageManager {

    protected $configurationManager;

    protected $inFailsafeMode = FALSE;

    public function __construct() {
        $this->configurationManager = new \TYPO3\CMS\Core\Configuration\ConfigurationManager;
        parent::__construct();
    }

    protected function loadPackageStates() {
        try {
            parent::loadPackageStates();
        } catch (\TYPO3\CMS\Core\Package\Exception\PackageStatesUnavailableException $exception) {
            $this->inFailsafeMode = TRUE;
            $this->packageStatesConfiguration = array();
            $this->scanAvailablePackages();
        }
    }

    protected function registerPackagesFromConfiguration() {
        $this->packageStatesConfiguration['packages']['install']['state'] = 'active';
        parent::registerPackagesFromConfiguration();
    }

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

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