Issue #3394680 by tstoeckler: Deprecate ContextProvidersPass in favor of using service_id_collector

core/core.services.yml

@@ -398,6 +398,8 @@ services:
   context.repository:
     class: Drupal\Core\Plugin\Context\LazyContextRepository
     arguments: ['@service_container']
+    tags:
+      - { name: service_id_collector, tag: context_provider }
   Drupal\Core\Plugin\Context\ContextRepositoryInterface: '@context.repository'
   Drupal\Component\DependencyInjection\ReverseContainer:
     arguments: [ '@service_container' ]

core/lib/Drupal/Core/CoreServiceProvider.php

@@ -8,7 +8,6 @@ use Drupal\Core\DependencyInjection\Compiler\AuthenticationProviderPass;
 use Drupal\Core\DependencyInjection\Compiler\BackendCompilerPass;
 use Drupal\Core\DependencyInjection\Compiler\CorsCompilerPass;
 use Drupal\Core\DependencyInjection\Compiler\DeprecatedServicePass;
-use Drupal\Core\DependencyInjection\Compiler\ContextProvidersPass;
 use Drupal\Core\DependencyInjection\Compiler\DevelopmentSettingsPass;
 use Drupal\Core\DependencyInjection\Compiler\ProxyServicesPass;
 use Drupal\Core\DependencyInjection\Compiler\StackedKernelPass;
@@ -91,7 +90,6 @@ class CoreServiceProvider implements ServiceProviderInterface, ServiceModifierIn
     // Add the compiler pass that will process the tagged services.
     $container->addCompilerPass(new ListCacheBinsPass());
     $container->addCompilerPass(new CacheContextsPass());
-    $container->addCompilerPass(new ContextProvidersPass());
     $container->addCompilerPass(new AuthenticationProviderPass());
 
     // Register plugin managers.

core/lib/Drupal/Core/DependencyInjection/Compiler/ContextProvidersPass.php

@@ -7,6 +7,12 @@ use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 
 /**
  * Adds the context provider service IDs to the context manager.
+ *
+ * @deprecated in drupal:10.2.0 and is removed from drupal:11.0.0. The
+ *    context.repository service uses the service_id_collector pattern instead
+ *    so this is no longer needed.
+ *
+ * @see https://www.drupal.org/node/3395641
  */
 class ContextProvidersPass implements CompilerPassInterface {