From 7db49517224f863ccb76afb3f3c1b61011692f9f Mon Sep 17 00:00:00 2001
From: Rhys Arkins <rhys@arkins.net>
Date: Thu, 1 Mar 2018 21:58:34 +0100
Subject: [PATCH] fix: use commonConfig branchPrefix only if set

---
 lib/workers/repository/index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/workers/repository/index.js b/lib/workers/repository/index.js
index 7abc1b1937..bc511240fe 100644
--- a/lib/workers/repository/index.js
+++ b/lib/workers/repository/index.js
@@ -85,7 +85,9 @@ async function renovateRepository(repoConfig, token, loop = 1) {
     return handleError(config, err);
   } finally {
     logger.setMeta({ repository: config.repository });
-    config.branchPrefix = commonConfig.branchPrefix;
+    config.branchPrefix = commonConfig
+      ? commonConfig.branchPrefix
+      : config.branchPrefix;
     await pruneStaleBranches(config);
     logger.info('Finished repository');
   }
-- 
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