Issue #2736911 by mikeryan: Provide convenience functions for creating entities from plugins

src/Entity/Migration.php

@@ -59,4 +59,30 @@ class Migration extends ConfigEntityBase implements MigrationInterface {
     Cache::invalidateTags(['migration_plugins']);
   }
 
+  /**
+   * Create a configuration entity from a core migration plugin's configuration.
+   *
+   * @param string $plugin_id
+   *   ID of a migration plugin managed by MigrationPluginManager.
+   * @param string $new_plugin_id
+   *   ID to use for the new configuration entity.
+   *
+   * @return \Drupal\migrate_plus\Entity\MigrationInterface
+   *   A Migration configuration entity (not saved to persistent storage).
+   */
+  public static function createEntityFromPlugin($plugin_id, $new_plugin_id) {
+    /** @var \Drupal\migrate\Plugin\MigrationPluginManagerInterface $plugin_manager */
+    $plugin_manager = \Drupal::service('plugin.manager.migration');
+    $migration_plugin = $plugin_manager->createInstance($plugin_id);
+    $entity_array['id'] = $new_plugin_id;
+    $entity_array['migration_tags'] = $migration_plugin->get('migration_tags');
+    $entity_array['label'] = $migration_plugin->label();
+    $entity_array['source'] = $migration_plugin->getSourceConfiguration();
+    $entity_array['destination'] = $migration_plugin->getDestinationConfiguration();
+    $entity_array['process'] = $migration_plugin->getProcess();
+    $entity_array['migration_dependencies'] = $migration_plugin->getMigrationDependencies();
+    $migration_entity = static::create($entity_array);
+    return $migration_entity;
+  }
+
 }