first commit

typo3/sysext/seo/ext_localconf.php

@@ -0,0 +1,31 @@
+<?php
+defined('TYPO3_MODE') or die();
+
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['metatag'] =
+    \TYPO3\CMS\Seo\MetaTag\MetaTagGenerator::class . '->generate';
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['hreflang'] =
+    \TYPO3\CMS\Seo\HrefLang\HrefLangGenerator::class . '->generate';
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['canonical'] =
+    \TYPO3\CMS\Seo\Canonical\CanonicalGenerator::class . '->generate';
+
+$metaTagManagerRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\MetaTag\MetaTagManagerRegistry::class);
+$metaTagManagerRegistry->registerManager(
+    'opengraph',
+    \TYPO3\CMS\Seo\MetaTag\OpenGraphMetaTagManager::class
+);
+$metaTagManagerRegistry->registerManager(
+    'twitter',
+    \TYPO3\CMS\Seo\MetaTag\TwitterCardMetaTagManager::class
+);
+unset($metaTagManagerRegistry);
+
+// Add module configuration
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScriptSetup(trim('
+    config.pageTitleProviders {
+        seo {
+            provider = TYPO3\CMS\Seo\PageTitle\SeoTitlePageTitleProvider
+            before = record
+            after = altPageTitle
+        }
+    }
+'));