first commit

typo3/sysext/backend/Classes/Command/ReferenceIndexUpdateCommand.php

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+<?php
+namespace TYPO3\CMS\Backend\Command;
+
+/*
+ * 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\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use TYPO3\CMS\Core\Core\Bootstrap;
+use TYPO3\CMS\Core\Database\ReferenceIndex;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Core function to check/update the Reference Index
+ */
+class ReferenceIndexUpdateCommand extends Command
+{
+    /**
+     * Configure the command by defining the name, options and arguments
+     */
+    public function configure()
+    {
+        $this->setDescription('Update the reference index of TYPO3')
+            ->addOption(
+                'check',
+                'c',
+                InputOption::VALUE_NONE,
+                'Only check the reference index of TYPO3'
+            );
+    }
+
+    /**
+     * Executes the command for adding or removing the lock file
+     *
+     * @param InputInterface $input
+     * @param OutputInterface $output
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        Bootstrap::initializeBackendAuthentication();
+
+        $isTestOnly = $input->getOption('check');
+        $isSilent = $output->getVerbosity() !== OutputInterface::VERBOSITY_QUIET;
+
+        /** @var ReferenceIndex $referenceIndex */
+        $referenceIndex = GeneralUtility::makeInstance(ReferenceIndex::class);
+        $referenceIndex->enableRuntimeCache();
+        $referenceIndex->updateIndex($isTestOnly, $isSilent);
+    }
+}