first commit

typo3/sysext/impexp/Configuration/Backend/Routes.php

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+<?php
+
+/**
+ * Definitions for routes provided by EXT:impexp
+ */
+return [
+    // Register click menu entry point
+    'xMOD_tximpexp' => [
+        'path' => '/record/importexport/',
+        'target' => \TYPO3\CMS\Impexp\Controller\ImportExportController::class . '::mainAction'
+    ]
+];

typo3/sysext/impexp/Configuration/Commands.php

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+<?php
+/**
+ * Commands to be executed by typo3, where the key of the array
+ * is the name of the command (to be called as the first argument after typo3).
+ * Required parameter is the "class" of the command which needs to be a subclass
+ * of Symfony/Console/Command.
+ */
+return [
+    'impexp:import' => [
+        'class' => \TYPO3\CMS\Impexp\Command\ImportCommand::class
+    ]
+];

typo3/sysext/impexp/Configuration/TCA/Overrides/pages.php

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+<?php
+defined('TYPO3_MODE') or die();
+
+$fields = [
+    'tx_impexp_origuid' => [
+        'config' => [
+            'type' => 'passthrough'
+        ]
+    ]
+];
+
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('pages', $fields);

typo3/sysext/impexp/Configuration/TCA/Overrides/pages_language_overlay.php

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+<?php
+defined('TYPO3_MODE') or die();
+
+$fields = [
+    'tx_impexp_origuid' => [
+        'config' => [
+            'type' => 'passthrough'
+        ]
+    ]
+];
+
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('pages_language_overlay', $fields);

typo3/sysext/impexp/Configuration/TCA/Overrides/sys_template.php

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+<?php
+defined('TYPO3_MODE') or die();
+
+$fields = [
+    'tx_impexp_origuid' => [
+        'config' => [
+            'type' => 'passthrough'
+        ]
+    ]
+];
+
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('sys_template', $fields);

typo3/sysext/impexp/Configuration/TCA/Overrides/tt_content.php

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+<?php
+defined('TYPO3_MODE') or die();
+
+$fields = [
+    'tx_impexp_origuid' => [
+        'config' => [
+            'type' => 'passthrough'
+        ]
+    ]
+];
+
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('tt_content', $fields);