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typo3/sysext/install/Classes/Updates/ReferenceIndexUpdatedPrerequisite.php

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+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Install\Updates;
+
+/*
+ * 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!
+ */
+
+use Symfony\Component\Console\Output\OutputInterface;
+use TYPO3\CMS\Core\Database\ReferenceIndex;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * ReferenceIndex Prerequisite
+ *
+ * Defines that the reference index needs to be up-to-date before an upgrade wizard may be run
+ *
+ * @internal
+ */
+class ReferenceIndexUpdatedPrerequisite implements PrerequisiteInterface, ChattyInterface
+{
+    /**
+     * @var object|\TYPO3\CMS\Core\Database\ReferenceIndex
+     */
+    private $referenceIndex;
+    /**
+     * @var OutputInterface
+     */
+    protected $output;
+
+    /**
+     * ReferenceIndexUpdatedPrerequisite constructor
+     */
+    public function __construct()
+    {
+        $this->referenceIndex = GeneralUtility::makeInstance(ReferenceIndex::class);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getTitle(): string
+    {
+        return 'Reference Index Up-to-Date';
+    }
+
+    /**
+     * Updates the reference index
+     *
+     * @return bool
+     */
+    public function ensure(): bool
+    {
+        $this->referenceIndex->enableRuntimeCache();
+        ob_clean();
+        ob_start();
+        $result = $this->referenceIndex->updateIndex(false, true);
+        $output = ob_get_clean();
+        $this->output->write($output);
+        return $result[2] === 0;
+    }
+
+    /**
+     * Checks whether there are reference index updates to be done
+     *
+     * @return bool
+     */
+    public function isFulfilled(): bool
+    {
+        $this->referenceIndex->enableRuntimeCache();
+        $result = $this->referenceIndex->updateIndex(true, false);
+        return $result[2] === 0;
+    }
+
+    /**
+     * @param OutputInterface $output
+     */
+    public function setOutput(OutputInterface $output): void
+    {
+        $this->output = $output;
+    }
+}