X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs-website;a=blobdiff_plain;f=web%2Fcore%2Flib%2FDrupal%2FCore%2FRouting%2FRouteProviderLazyBuilder.php;fp=web%2Fcore%2Flib%2FDrupal%2FCore%2FRouting%2FRouteProviderLazyBuilder.php;h=a2cb8c57851330c28545bd05fa136b6f36d52bf1;hp=8c59900c82ff38b5f9deed5f97b50ffafd63e922;hb=9917807b03b64faf00f6a1f29dcb6eafc454efa5;hpb=aea91e65e895364e460983b890e295aa5d5540a5

diff --git a/web/core/lib/Drupal/Core/Routing/RouteProviderLazyBuilder.php b/web/core/lib/Drupal/Core/Routing/RouteProviderLazyBuilder.php
index 8c59900c8..a2cb8c578 100644
--- a/web/core/lib/Drupal/Core/Routing/RouteProviderLazyBuilder.php
+++ b/web/core/lib/Drupal/Core/Routing/RouteProviderLazyBuilder.php
@@ -3,12 +3,13 @@
 namespace Drupal\Core\Routing;
 
 use Symfony\Cmf\Component\Routing\PagedRouteProviderInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpFoundation\Request;
 
 /**
  * A Route Provider front-end for all Drupal-stored routes.
  */
-class RouteProviderLazyBuilder implements PreloadableRouteProviderInterface, PagedRouteProviderInterface {
+class RouteProviderLazyBuilder implements PreloadableRouteProviderInterface, PagedRouteProviderInterface, EventSubscriberInterface {
 
   /**
    * The route provider service.
@@ -31,6 +32,18 @@ class RouteProviderLazyBuilder implements PreloadableRouteProviderInterface, Pag
    */
   protected $rebuilt = FALSE;
 
+  /**
+   * Flag to determine if router is currently being rebuilt.
+   *
+   * Used to prevent recursive router rebuilds during module installation.
+   * Recursive rebuilds can occur when route information is required by alter
+   * hooks that are triggered during a rebuild, for example,
+   * hook_menu_links_discovered_alter().
+   *
+   * @var bool
+   */
+  protected $rebuilding = FALSE;
+
   /**
    * RouteProviderLazyBuilder constructor.
    *
@@ -51,7 +64,7 @@ class RouteProviderLazyBuilder implements PreloadableRouteProviderInterface, Pag
    *   The route provider service.
    */
   protected function getRouteProvider() {
-    if (!$this->rebuilt) {
+    if (!$this->rebuilt && !$this->rebuilding) {
       $this->routeBuilder->rebuild();
       $this->rebuilt = TRUE;
     }
@@ -132,4 +145,27 @@ class RouteProviderLazyBuilder implements PreloadableRouteProviderInterface, Pag
     return $this->rebuilt;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    $events[RoutingEvents::DYNAMIC][] = ['routerRebuilding', 3000];
+    $events[RoutingEvents::FINISHED][] = ['routerRebuildFinished', -3000];
+    return $events;
+  }
+
+  /**
+   * Sets the router rebuilding flag to TRUE.
+   */
+  public function routerRebuilding() {
+    $this->rebuilding = TRUE;
+  }
+
+  /**
+   * Sets the router rebuilding flag to FALSE.
+   */
+  public function routerRebuildFinished() {
+    $this->rebuilding = FALSE;
+  }
+
 }