--- /dev/null
+<?php
+
+namespace Drupal\migrate_drupal\Plugin\migrate\source;
+
+use Drupal\Component\Plugin\DependentPluginInterface;
+use Drupal\Core\Entity\DependencyTrait;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\migrate\Plugin\MigrationInterface;
+use Drupal\migrate\Plugin\migrate\source\EmptySource as BaseEmptySource;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+
+
+/**
+ * Source returning an empty row with Drupal specific config dependencies.
+ *
+ * @MigrateSource(
+ * id = "md_empty"
+ * )
+ */
+class EmptySource extends BaseEmptySource implements ContainerFactoryPluginInterface, DependentPluginInterface {
+
+ use DependencyTrait;
+
+ /**
+ * The entity manager.
+ *
+ * @var \Drupal\Core\Entity\EntityManagerInterface
+ */
+ protected $entityManager;
+
+ /**
+ * {@inheritdoc}
+ */
+ public function __construct(array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration, EntityManagerInterface $entity_manager) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition, $migration);
+ $this->entityManager = $entity_manager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+ return new static(
+ $configuration,
+ $plugin_id,
+ $plugin_definition,
+ $migration,
+ $container->get('entity.manager')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function calculateDependencies() {
+ // The empty source plugin supports the entity_type constant.
+ if (isset($this->configuration['constants']['entity_type'])) {
+ $this->addDependency('module', $this->entityManager->getDefinition($this->configuration['constants']['entity_type'])->getProvider());
+ }
+ return $this->dependencies;
+ }
+
+}