--- /dev/null
+<?php
+
+namespace Drupal\Core\Plugin;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Registers plugin managers to the plugin.cache_clearer service.
+ */
+class PluginManagerPass implements CompilerPassInterface {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function process(ContainerBuilder $container) {
+ $cache_clearer_definition = $container->getDefinition('plugin.cache_clearer');
+ foreach ($container->getDefinitions() as $service_id => $definition) {
+ if (strpos($service_id, 'plugin.manager.') === 0 || $definition->hasTag('plugin_manager_cache_clear')) {
+ if (is_subclass_of($definition->getClass(), '\Drupal\Component\Plugin\Discovery\CachedDiscoveryInterface')) {
+ $cache_clearer_definition->addMethodCall('addCachedDiscovery', [new Reference($service_id)]);
+ }
+ }
+ }
+ }
+
+}