backport verify-govulncheck.sh

This commit will backport verify-govulncheck.sh
from master to release-1.27 branch

Signed-off-by: ArkaSaha30 <arkasaha30@gmail.com>

hack/verify-govulncheck.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+# Copyright 2023 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
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+source "${KUBE_ROOT}/hack/lib/init.sh"
+source "${KUBE_ROOT}/hack/lib/util.sh"
+
+# make sure everything is committed
+kube::util::ensure_clean_working_dir
+
+# This sets up the environment, like GOCACHE, which keeps the worktree cleaner.
+kube::golang::setup_env
+
+go install golang.org/x/vuln/cmd/govulncheck@v1.1.0
+
+# KUBE_VERIFY_GIT_BRANCH is populated in verify CI jobs
+BRANCH="${KUBE_VERIFY_GIT_BRANCH:-master}"
+
+kube::util::ensure-temp-dir
+WORKTREE="${KUBE_TEMP}/worktree"
+
+# Create a copy of the repo with $BRANCH checked out
+git worktree add -f "${WORKTREE}" "${BRANCH}"
+# Clean up the copy on exit
+kube::util::trap_add "git worktree remove -f ${WORKTREE}" EXIT
+
+govulncheck -scan module ./... > "${KUBE_TEMP}/head.txt"
+pushd "${WORKTREE}" >/dev/null
+  govulncheck -scan module ./... > "${KUBE_TEMP}/pr-base.txt"
+popd >/dev/null
+
+echo -e "\n HEAD: $(cat "${KUBE_TEMP}"/head.txt)"
+echo -e "\n PR_BASE: $(cat "${KUBE_TEMP}/pr-base.txt")"
+
+diff -s -u --ignore-all-space "${KUBE_TEMP}"/pr-base.txt "${KUBE_TEMP}"/head.txt || true