UPSTREAM: <carry>: Compile without KUBECONFIG

hack/verify-kustomize reads the current namespace and adds it into
generated / verified manifests.

With KUBECONFIG="", it won't be able to get the namespace and thus it will
generate manifests with namespace: default.

Makefile

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+KUBECONFIG=""
+
 VERSION?=v1.11.3
 
 PKG=github.com/kubernetes-sigs/aws-ebs-csi-driver

hack/verify-kustomize

@@ -16,6 +16,12 @@
 
 set -euo pipefail
 
+set -x
+
+export KUBECONFIG=""
+
+set
+
 echo "Verifying kustomize"
 diff=$(git status --porcelain=v1)
 if [[ -n "${diff}" ]]; then
@@ -29,6 +35,7 @@ echo
 diff=$(git status --porcelain=v1)
 if [[ -n "${diff}" ]]; then
   echo "${diff}"
+  git diff
   echo
   echo "Please run make generate-kustomize to fix the issue(s)"
   exit 1