Issue #2625212 by faline, bbrala, cilefen, bircher, okay19, krishnan.n, snehi,...

Issue #2625212 by faline, bbrala, cilefen, bircher, okay19, krishnan.n, snehi, tstoeckler, kostyashupenko, chi, alexpott, dawehner, wim leers, smustgrave, godotislate, cs_shadow, catch, berdir, mxr576: Add ConfigSchemaChecker to development.services.yml

core/assets/scaffold/files/development.services.yml

@@ -17,3 +17,14 @@ parameters:
 services:
   cache.backend.null:
     class: Drupal\Core\Cache\NullBackendFactory
+  logger.channel.config_schema:
+    parent: logger.channel_base
+    arguments: [ 'config_schema' ]
+  config.schema_checker:
+    class: Drupal\Core\Config\Development\LenientConfigSchemaChecker
+    arguments:
+      - '@config.typed'
+      - '@messenger'
+      - '@logger.channel.config_schema'
+    tags:
+      - { name: event_subscriber }

core/lib/Drupal/Core/Config/Development/LenientConfigSchemaChecker.php

+<?php
+
+namespace Drupal\Core\Config\Development;
+
+use Drupal\Core\Config\ConfigCrudEvent;
+use Drupal\Core\Config\Schema\SchemaIncompleteException;
+use Drupal\Core\Config\TypedConfigManagerInterface;
+use Drupal\Core\Messenger\MessengerInterface;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Listens to the config save event and warns about invalid schema.
+ */
+class LenientConfigSchemaChecker extends ConfigSchemaChecker {
+
+  /**
+   * Constructs the ConfigSchemaChecker object.
+   *
+   * @param \Drupal\Core\Config\TypedConfigManagerInterface $typed_manager
+   *   The typed config manager.
+   * @param \Drupal\Core\Messenger\MessengerInterface $messenger
+   *   The messenger service to display the warning.
+   * @param \Psr\Log\LoggerInterface $logger
+   *   The logger to save the warning.
+   * @param string[] $exclude
+   *   An array of config object names that are excluded from schema checking.
+   */
+  public function __construct(TypedConfigManagerInterface $typed_manager, protected readonly MessengerInterface $messenger, protected readonly LoggerInterface $logger, array $exclude = []) {
+    parent::__construct($typed_manager, $exclude);
+  }
+
+  /**
+   * Checks that configuration complies with its schema on config save.
+   *
+   * @param \Drupal\Core\Config\ConfigCrudEvent $event
+   *   The configuration event.
+   */
+  public function onConfigSave(ConfigCrudEvent $event): void {
+    try {
+      parent::onConfigSave($event);
+    }
+    catch (SchemaIncompleteException $exception) {
+      $message = sprintf('%s. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="%s">the documentation</a>.', $exception->getMessage(), 'https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata');
+
+      $this->messenger->addWarning($message);
+      $this->logger->warning($message);
+    }
+  }
+
+}

sites/development.services.yml

@@ -17,3 +17,14 @@ parameters:
 services:
   cache.backend.null:
     class: Drupal\Core\Cache\NullBackendFactory
+  logger.channel.config_schema:
+    parent: logger.channel_base
+    arguments: [ 'config_schema' ]
+  config.schema_checker:
+    class: Drupal\Core\Config\Development\LenientConfigSchemaChecker
+    arguments:
+      - '@config.typed'
+      - '@messenger'
+      - '@logger.channel.config_schema'
+    tags:
+      - { name: event_subscriber }