From 30315919151a1529fe1887c95c038cd14cb5be9a Mon Sep 17 00:00:00 2001
From: Adam Reese <adam@reese.io>
Date: Thu, 28 Apr 2016 15:56:15 -0700
Subject: [PATCH] fix(local-cluster): unbound var error

---
 scripts/local-cluster.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/local-cluster.sh b/scripts/local-cluster.sh
index 7b6ae340f..a27ee979a 100755
--- a/scripts/local-cluster.sh
+++ b/scripts/local-cluster.sh
@@ -249,7 +249,7 @@ download_kubectl() {
 # https://github.com/kubernetes/kubernetes/issues/23197
 # code stolen from https://github.com/huggsboson/docker-compose-kubernetes/blob/SwitchToSharedMount/kube-up.sh
 clean_volumes() {
-  if [[ -n "${DOCKER_MACHINE_NAME}" ]]; then
+  if [[ -n "${DOCKER_MACHINE_NAME:-}" ]]; then
     docker-machine ssh "${DOCKER_MACHINE_NAME}" "mount | grep -o 'on /var/lib/kubelet.* type' | cut -c 4- | rev | cut -c 6- | rev | sort -r | xargs --no-run-if-empty sudo umount"
     docker-machine ssh "${DOCKER_MACHINE_NAME}" "sudo rm -Rf /var/lib/kubelet"
     docker-machine ssh "${DOCKER_MACHINE_NAME}" "sudo mkdir -p /var/lib/kubelet"