commit ed006bfec1fbf39507fcd63c5ef297a70499f636
Author: Andy Postnikov <apostnikov@gmail.com>
Date:   Mon Feb 27 14:21:49 2017 +0200

    p2

diff --git a/default_content.services.yml b/default_content.services.yml
index b2fd96e..fdd8723 100644
--- a/default_content.services.yml
+++ b/default_content.services.yml
@@ -2,3 +2,9 @@ services:
   default_content.manager:
     class: Drupal\default_content\DefaultContentManager
     arguments: ['@serializer', '@plugin.manager.rest', '@current_user', '@entity_type.manager', '@entity.repository', '@rest.link_manager', '@event_dispatcher', '@module_handler', '@info_parser']
+
+  default_content.event_subscriber:
+    class: Drupal\default_content\EventSubscriber\ConfigImportMissingContentEventSubscriber
+    arguments: ['@state']
+    tags:
+      - { name: event_subscriber }
diff --git a/src/EventSubscriber/ConfigImportMissingContentEventSubscriber.php b/src/EventSubscriber/ConfigImportMissingContentEventSubscriber.php
new file mode 100644
index 0000000..24e216c
--- /dev/null
+++ b/src/EventSubscriber/ConfigImportMissingContentEventSubscriber.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace Drupal\default_content\EventSubscriber;
+
+use Drupal\Core\Config\ConfigEvents;
+use Drupal\Core\Config\Importer\MissingContentEvent;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Defines an event listener implementation for config sync events.
+ */
+class ConfigImportMissingContentEventSubscriber implements EventSubscriberInterface {
+  use StringTranslationTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  static public function getSubscribedEvents() {
+    $events[ConfigEvents::IMPORT_MISSING_CONTENT][] = [
+      'onConfigImporterMissingContent',
+      20,
+    ];
+    return $events;
+  }
+
+  /**
+   * Imports missing content from default content.
+   *
+   * @param \Drupal\Core\Config\Importer\MissingContentEvent $event
+   *   The config import event.
+   */
+  public function onConfigImporterMissingContent(MissingContentEvent $event) {
+    foreach ($event->getMissingContent() as $uuid => $data) {
+      \Drupal::logger('default_content')
+        ->info('Missing content @uuid (@entity_type - @bundle', [
+          '@uuid' => $uuid,
+          '@entity_type' => $data['entity_type'],
+          '@bundle' => $data['bundle'],
+        ]);
+      if ($this->doResolve($uuid, $data)) {
+        $event->resolveMissingContent($uuid);
+      }
+    }
+  }
+
+  /**
+   * Resolves importing missed content.
+   *
+   * @param string $uuid
+   *   The uuid to search enabled extensions.
+   * @param array $data
+   *   A list of missing content dependencies. The array is keyed by UUID. Each
+   *   value is an array with the following keys: 'entity_type', 'bundle' and
+   *   'uuid'.
+   *
+   * @return bool
+   *   TRUE when import successful, FALSE otherwise.
+   */
+  protected function doResolve($uuid, array $data) {
+    // @todo Search for UUID in enabled modules.
+    $module = 'node';
+    $path = implode(DIRECTORY_SEPARATOR, [
+      drupal_get_path('module', $module),
+      $data['entity_type'],
+      $data['uuid'] . '.json',
+    ]);
+    /** @var \Drupal\default_content\DefaultContentManagerInterface $service */
+    $service = \Drupal::service('default_content.manager');
+    //$service->importContent($module, $uuid);
+    $service->importContent($path);
+    return FALSE;
+  }
+
+}