Avoid circular dependency.

dgi_fixity.module

@@ -17,6 +17,7 @@ use Drupal\Core\Mail\MailFormatHelper;
 use Drupal\Core\Render\Element;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Url;
+use Drupal\dgi_fixity\FixityCheckServiceInterface;
 use Drupal\dgi_fixity\Form\SettingsForm;
 use Drupal\file\Plugin\Field\FieldWidget\FileWidget;
 use Drupal\user\Entity\User;
@@ -145,15 +146,16 @@ function dgi_fixity_cron() {
  * Implements hook_entity_type_alter().
  */
 function dgi_fixity_entity_type_alter(array &$entity_types) {
-  /** @var \Drupal\dgi_fixity\FixityCheckServiceInterface $fixity */
-  $fixity = \Drupal::service('dgi_fixity.fixity_check');
-  $supported_entity_types = $fixity->fromEntityTypes();
-  foreach ($supported_entity_types as $entity_type_id) {
+  // XXX: Cannot reference dgi_fixity.fixity_check:fromEntityTypes() due to
+  // circular dependencies, as dgi_fixity.fixity_check makes use of the
+  // entity_type.manager that we are in the middle of trying to build.
+  foreach (FixityCheckServiceInterface::ENTITY_TYPES as $entity_type_id) {
     $entity_type = &$entity_types[$entity_type_id];
     $entity_type->setLinkTemplate('fixity-audit', "/fixity/$entity_type_id/{{$entity_type_id}}");
     $entity_type->setLinkTemplate('fixity-check', "/fixity/$entity_type_id/{{$entity_type_id}}/check");
     $entity_type->setFormClass('fixity-check', 'Drupal\dgi_fixity\Form\CheckForm');
   }
+  unset($entity_type);
 }
 
 /**

dgi_fixity.services.yml

@@ -1,9 +1,7 @@
 services:
   dgi_fixity.fixity_check:
     class: Drupal\dgi_fixity\FixityCheckService
-    arguments: ['@string_translation', '@config.factory', '@entity_type.manager', '@datetime.time', '@filehash']
-    calls:
-      - [setLoggerFactory, ['@logger.factory']]
+    arguments: ['@string_translation', '@config.factory', '@entity_type.manager', '@datetime.time', '@filehash', '@logger.channel.dgi_fixity']
   dgi_fixity.route_subscriber:
     class: Drupal\dgi_fixity\Routing\FixityCheckRouteSubscriber
     arguments: ['@entity_type.manager', '@dgi_fixity.fixity_check']
@@ -15,6 +13,5 @@ services:
     tags:
       - { name: paramconverter }
   logger.channel.dgi_fixity:
-    class: Drupal\Core\Logger\LoggerChannel
-    factory: logger.factory:get
+    parent: logger.channel_base
     arguments: ['dgi_fixity']

src/FixityCheckService.php

@@ -18,6 +18,7 @@ use Drupal\filehash\FileHash;
 use Drupal\media\MediaInterface;
 use Drupal\views\ViewExecutable;
 use Drupal\views\Views;
+use Psr\Log\LoggerInterface;
 
 /**
  * Decorates the FileHash services adding additional functionality.
@@ -61,13 +62,6 @@ class FixityCheckService implements FixityCheckServiceInterface {
    */
   protected $filehash;
 
-  /**
-   * The logger factory.
-   *
-   * @var \Drupal\Core\Logger\LoggerChannelFactoryInterface
-   */
-  protected LoggerChannelFactoryInterface $loggerFactory;
-
   /**
    * Constructor.
    */
@@ -76,46 +70,22 @@ class FixityCheckService implements FixityCheckServiceInterface {
     ConfigFactoryInterface $config,
     EntityTypeManagerInterface $entity_type_manager,
     TimeInterface $time,
-    FileHash $filehash
+    FileHash $filehash,
+    LoggerInterface $logger,
   ) {
     $this->stringTranslation = $string_translation;
     $this->config = $config;
     $this->entityTypeManager = $entity_type_manager;
     $this->time = $time;
     $this->filehash = $filehash;
-  }
-
-  /**
-   * Sets the logger factory.
-   *
-   * @param \Drupal\Core\Logger\LoggerChannelFactoryInterface $loggerFactory
-   *   The logger factory.
-   */
-  public function setLoggerFactory(LoggerChannelFactoryInterface $loggerFactory) {
-    $this->loggerFactory = $loggerFactory;
-  }
-
-  /**
-   * Gets the logger channel.
-   *
-   * @return \Psr\Log\LoggerInterface
-   *   The logger channel.
-   */
-  protected function getLogger() {
-    if (!isset($this->logger)) {
-      $this->logger = $this->loggerFactory->get('dgi_fixity');
-    }
-    return $this->logger;
+    $this->logger = $logger;
   }
 
   /**
    * {@inheritdoc}
    */
   public function fromEntityTypes(): array {
-    return [
-      'media',
-      'file',
-    ];
+    return static::ENTITY_TYPES;
   }
 
   /**
@@ -298,10 +268,10 @@ class FixityCheckService implements FixityCheckServiceInterface {
       )->toString(),
     ];
     if ($check->passed()) {
-      $this->getLogger()->info($message, $args);
+      $this->logger->info($message, $args);
     }
     else {
-      $this->getLogger()->error($message, $args);
+      $this->logger->error($message, $args);
     }
 
     return $check;

src/FixityCheckServiceInterface.php

@@ -12,6 +12,11 @@ use Drupal\views\ViewExecutable;
  */
 interface FixityCheckServiceInterface {
 
+  const ENTITY_TYPES = [
+    'media',
+    'file',
+  ];
+
   /**
    * A list of entity types which be converted into a fixity_check entity.
    *