From 67654a44d13632e2bc8c5637baef4459a58d65b1 Mon Sep 17 00:00:00 2001
From: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Date: Fri, 17 Jul 2015 16:03:38 +0200
Subject: [PATCH] Avoid cache building for super-weird case when repository
 root_ref is nil

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
---
 app/workers/project_cache_worker.rb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/workers/project_cache_worker.rb b/app/workers/project_cache_worker.rb
index 61416d634bd..55cb6af232e 100644
--- a/app/workers/project_cache_worker.rb
+++ b/app/workers/project_cache_worker.rb
@@ -7,6 +7,9 @@ class ProjectCacheWorker
     project = Project.find(project_id)
     project.update_repository_size
     project.update_commit_count
-    project.repository.build_cache
+
+    if project.repository.root_ref
+      project.repository.build_cache
+    end
   end
 end