plugin.php

<?php
/**
 * Rollback Auto Update
 *
 * @package rollback-update-failure
 * @license MIT
 */

/**
 * Plugin Name: Rollback Auto Update
 * Author: WP Core Contributors
 * Description: A feature plugin now only for testing Rollback Auto Update, aka Rollback part 3. Manual Rollback of update failures has been committed in WordPress 6.3.
 * Version: 7.2.1
 * Network: true
 * License: MIT
 * Text Domain: rollback-update-failure
 * Requires PHP: 7.0
 * Requires at least: 6.3
 * GitHub Plugin URI: https://github.com/WordPress/rollback-update-failure
 * Primary Branch: main
 */

namespace Rollback_Update_Failure;

/*
 * Exit if called directly.
 */
if ( ! defined( 'WPINC' ) ) {
	die;
}

require_once \ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';
if ( method_exists( 'WP_Automatic_Updater', 'has_fatal_error' ) ) {
	require_once ABSPATH . 'wp-admin/includes/plugin.php';
	deactivate_plugins( __FILE__ );
	return;
}

require_once __DIR__ . '/src/testing/failure-simulator.php';

add_action(
	'plugins_loaded',
	function () {
		require_once \ABSPATH . \WPINC . '/class-wp-error.php';
		require_once \ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
		require_once \ABSPATH . 'wp-admin/includes/class-wp-upgrader-skin.php';
		require_once \ABSPATH . 'wp-admin/includes/class-automatic-upgrader-skin.php';
		require_once \ABSPATH . 'wp-admin/includes/class-theme-upgrader.php';
		require_once \ABSPATH . 'wp-admin/includes/class-core-upgrader.php';
		require_once \ABSPATH . 'wp-admin/includes/class-language-pack-upgrader.php';

		// phpcs:disable Squiz.Commenting.ClassComment.Missing,Generic.Files.OneObjectStructurePerFile.MultipleFound
		class WP_Error extends \WP_Error {}
		class Automatic_Upgrader_Skin extends \Automatic_Upgrader_Skin {}
		class WP_Upgrader_Skin extends \WP_Upgrader_Skin {}
		class Theme_Upgrader extends \Theme_Upgrader {}
		class Core_Upgrader extends \Core_Upgrader {}
		class Language_Pack_Upgrader extends \Language_Pack_Upgrader {}
		// phpcs:enable

		require_once __DIR__ . '/src/wp-admin/includes/class-wp-upgrader.php';
		require_once __DIR__ . '/src/wp-admin/includes/class-wp-automatic-updater.php';
		require_once __DIR__ . '/src/wp-admin/includes/class-plugin-upgrader.php';

		remove_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' );
		add_action(
			'wp_maybe_auto_update',
			function () {
				if ( ! function_exists( 'wp_is_auto_update_enabled_for_type' ) ) {
					require_once \ABSPATH . 'wp-admin/includes/update.php';
				}
				add_filter( 'upgrader_source_selection', __NAMESPACE__ . '\fix_mangled_source', 10, 4 );
				$upgrader = new WP_Automatic_Updater();
				delete_option( 'option_auto_updater.lock' );
				WP_Upgrader::release_lock( 'auto_updater' );
				$upgrader->run();
			}
		);
	}
);

/**
 * Correctly rename dependency for activation.
 *
 * @param string      $source        File source location.
 * @param string      $remote_source Remote file source location.
 * @param WP_Upgrader $upgrader      WP_Upgrader instance.
 * @param array       $hook_extra    Extra arguments passed to hooked filters.
 * @return string
 */
function fix_mangled_source( $source, $remote_source, $upgrader, $hook_extra ) {
	if ( isset( $hook_extra['temp_backup']['slug'] ) ) {
		$new_source = trailingslashit( $remote_source ) . $hook_extra['temp_backup']['slug'];
		move_dir( $source, $new_source, true );

		return trailingslashit( $new_source );
	}

	return $source;
}