From 218af07b88c373dff935ddd6f679b3db6be3cd7e Mon Sep 17 00:00:00 2001
From: "James E. Blair" <jeblair@hp.com>
Date: Tue, 6 Nov 2012 17:22:27 +0100
Subject: [PATCH] If there is no ZUUL_REF, don't fetch it.

Periodic jobs don't get a ZUUL_REF, so don't try to check it out,
just fall back to checking otu the branch.

Change-Id: Id2769d70800a03ccf49012c6f3fce14cffec9671
---
 devstack-vm-gate-wrap.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/devstack-vm-gate-wrap.sh b/devstack-vm-gate-wrap.sh
index b665e534..c9b65b68 100755
--- a/devstack-vm-gate-wrap.sh
+++ b/devstack-vm-gate-wrap.sh
@@ -120,7 +120,8 @@ function setup_workspace {
       fi
 
       # See if Zuul prepared a ref for this project
-      if git fetch https://review.openstack.org/p/$PROJECT $ZUUL_REF; then
+      if [ "$ZUUL_REF" != "" ] && \
+          git fetch https://review.openstack.org/p/$PROJECT $ZUUL_REF; then
         # It's there, so check it out.
         git checkout FETCH_HEAD
         git reset --hard FETCH_HEAD