Add verification to code gen

hack/after-build/run-codegen.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
+source "${KUBE_ROOT}/hack/lib/init.sh"
+
+kube::golang::setup_env
+
+setgen=$(kube::util::find-binary "set-gen")
+
+# Please do not add any logic to this shell script. Add logic to the go code
+# that generates the set-gen program.
+#
+# This can be called with one flag, --verify-only, so it works for both the
+# update- and verify- scripts.
+${setgen} "$@"
+
+# You may add additional calls of code generators like set-gen below.