hack: add script for creating mirror repo PRs

Until the e2e CI is migrated to community infra, this script
will be useful for all PR authors to create a PR in the mirror
repo and run the CI there.

hack/create-mirror-repository-pr.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# Copyright 2024 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.
+
+if [ -z "${PR_NUMBER}" ]; then
+  echo "PR_NUMBER must be set"
+  exit 1
+fi
+
+gh pr view "${PR_NUMBER}" \
+  -R kubernetes-sigs/cluster-api-provider-vsphere \
+  --json headRepository,headRepositoryOwner,headRefName,baseRefName \
+  -q '"https://github.com/team-cluster-api/cluster-api-provider-vsphere/compare/" \
+  + .baseRefName + "..." + .headRepositoryOwner.login + ":" + .headRepository.name + ":" + .headRefName'