function UpdateKernel::fixSerializedExtensionObjects

Fixes caches and theme info if they contain old Extension objects.

@internal This function is only to be called by the Drupal core update process. Additionally, this function will be removed in minor release of Drupal.

@todo https://www.drupal.org/project/drupal/issues/3031322 Remove once Drupal 8.6.x is not supported.

Parameters

\Symfony\Component\DependencyInjection\ContainerInterface $container: The container.

File

core/lib/Drupal/Core/Update/UpdateKernel.php, line 215

Class

UpdateKernel

Defines a kernel which is used primarily to run the update of Drupal.

Namespace

Code

public static function fixSerializedExtensionObjects(ContainerInterface $container) {
    // Create a custom error handler that will clear caches if a warning occurs
    // while getting 'system.theme.data' from state. If this state value was
    // created by Drupal <= 8.6.7 then when it is read by Drupal >= 8.6.8 there
    // will be PHP warnings. This silently fixes Drupal so that the update can
    // continue.
    $clear_caches = FALSE;
    $callable = function ($errno, $errstr) use ($container, &$clear_caches) {
        if ($errstr === 'Class Drupal\\Core\\Extension\\Extension has no unserializer') {
            $clear_caches = TRUE;
        }
    };
    set_error_handler($callable, E_ERROR | E_WARNING);
    $container->get('state')
        ->get('system.theme.data', []);
    restore_error_handler();
    if ($clear_caches) {
        // Reset static caches in profile list so the module list is rebuilt
        // correctly.
        $container->get('extension.list.profile')
            ->reset();
        foreach ($container->getParameter('cache_bins') as $service_id => $bin) {
            $container->get($service_id)
                ->deleteAll();
        }
        // The system.theme.data key is no longer used in Drupal 8.7.x.
        $container->get('state')
            ->delete('system.theme.data');
        // Also rebuild themes because it uses state as cache.
        $container->get('theme_handler')
            ->refreshInfo();
    }
}