Update dep verify step to also ensure vendor is up to date

Makefile

@@ -83,7 +83,8 @@ deploy_verify:
 # Go targets
 #################
 dep_verify:
-	dep status
+	@echo Running dep
+	$(HACK_DIR)/verify-deps.sh
 
 go_verify: go_fmt go_test
 

hack/update-deps.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")
+REPO_ROOT="${SCRIPT_ROOT}/.."
+pushd "${REPO_ROOT}"
+echo "+++ Running dep ensure"
+dep ensure -v "$@"
+echo "+++ Cleaning up erroneous vendored testdata symlinks"
+rm -Rf vendor/github.com/prometheus/procfs/fixtures \
+       vendor/github.com/hashicorp/go-rootcerts/test-fixtures \
+       vendor/github.com/json-iterator/go/skip_tests
+popd

hack/verify-deps.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# Copyright 2017 The Kubernetes Authors.
+#
+# 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
+
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
+
+pushd "${SCRIPT_ROOT}"
+echo "+++ Checking Gopkg.lock is up-to-date"
+dep status
+popd
+
+echo "+++ Checking vendor/ is up-to-date"
+DIFFROOT="${SCRIPT_ROOT}/vendor"
+TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/vendor"
+_tmp="${SCRIPT_ROOT}/_tmp"
+
+cleanup() {
+  rm -rf "${_tmp}"
+}
+trap "cleanup" EXIT SIGINT
+
+cleanup
+
+mkdir -p "${TMP_DIFFROOT}"
+cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
+
+"${SCRIPT_ROOT}/hack/update-deps.sh" -vendor-only
+echo "diffing ${DIFFROOT} against freshly generated vendor dir"
+ret=0
+diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
+cp -a "${TMP_DIFFROOT}"/* "${DIFFROOT}"
+if [[ $ret -eq 0 ]]
+then
+  echo "${DIFFROOT} up to date."
+else
+  echo "${DIFFROOT} is out of date. Please run hack/update-deps.sh"
+  exit 1
+fi