UpdateScriptTestHooks.php

<?php

declare (strict_types=1);
namespace Drupal\update_script_test\Hook;

use Drupal\Core\Extension\Extension;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for update_script_test.
 */
class UpdateScriptTestHooks {
    
    /**
     * Implements hook_cache_flush().
     *
     * This sets a message to confirm that all caches are cleared whenever
     * update.php completes.
     *
     * @see UpdateScriptFunctionalTest::testRequirements()
     */
    public function cacheFlush() {
        \Drupal::messenger()->addStatus(t('hook_cache_flush() invoked for update_script_test.module.'));
    }
    
    /**
     * Implements hook_system_info_alter().
     */
    public function systemInfoAlter(array &$info, Extension $file, $type) : void {
        $new_info = \Drupal::state()->get('update_script_test.system_info_alter');
        if ($new_info) {
            if ($file->getName() == 'update_script_test') {
                $info = $new_info + $info;
            }
        }
    }

}