function UpdateRegistry::onConfigSave

Processes the list of installed extensions when core.extension changes.

Parameters

\Drupal\Core\Config\ConfigCrudEvent $event: The Event to process.

File

core/lib/Drupal/Core/Update/UpdateRegistry.php, line 341

Class

UpdateRegistry

Provides all and missing update implementations.

Namespace

Code

public function onConfigSave(ConfigCrudEvent $event) {
  $config = $event->getConfig();
  if ($config->getName() === 'core.extension') {
    // Build the old extension configuration list from configuration rather
    // than using $this->enabledExtensions. This ensures that if the
    // UpdateRegistry is constructed after _drupal_maintenance_theme() has
    // added a theme to the theme handler it will not be considered as already
    // installed.
    $old_extension_list = array_keys($config->getOriginal('module') ?? []);
    $new_extension_list = array_keys($config->get('module'));
    if ($this->includeThemes()) {
      $new_extension_list = array_merge($new_extension_list, array_keys($config->get('theme')));
      $old_extension_list = array_merge($old_extension_list, array_keys($config->getOriginal('theme') ?? []));
    }
    // The list of extensions installed or uninstalled. In regular operation
    // only one of the lists will have a single value. This is because Drupal
    // can only install one extension at a time.
    $uninstalled_extensions = array_diff($old_extension_list, $new_extension_list);
    $installed_extensions = array_diff($new_extension_list, $old_extension_list);
    // Set the list of enabled extensions correctly so update function
    // discovery works as expected.
    $this->enabledExtensions = $new_extension_list;
    foreach ($uninstalled_extensions as $uninstalled_extension) {
      $this->filterOutInvokedUpdatesByExtension($uninstalled_extension);
    }
    foreach ($installed_extensions as $installed_extension) {
      // Ensure that all post_update functions are registered already. This
      // should include existing post-updates, as well as any specified as
      // having been previously removed, to ensure that newly installed and
      // updated sites have the same entries in the registry.
      $this->registerInvokedUpdates(array_merge($this->getUpdateFunctions($installed_extension), array_keys($this->getRemovedPostUpdates($installed_extension))));
    }
  }
}