Tag releases via PR

hack/tag-release.sh

@@ -0,0 +1,32 @@
+#!/bin/bash -xe
+
+# 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.
+
+VERSION=$(cat version.txt)
+
+if [[ ! "${VERSION}" =~ ^([0-9]+[.][0-9]+)[.]([0-9]+)(-(alpha|beta)[.]([0-9]+))?$ ]]; then
+  echo "Version ${VERSION} must be 'X.Y.Z', 'X.Y.Z-alpha.N', or 'X.Y.Z-beta.N'"
+  exit 1
+fi
+
+if [ "$(git tag -l "v${VERSION}")" ]; then
+  echo "Tag v${VERSION} already exists"
+  exit 1
+fi
+
+git tag -a -m "Release ${VERSION}" "v${VERSION}"
+git push origin "v${VERSION}"
+
+echo "release_tag=refs/tags/v${VERSION}" >> $GITHUB_OUTPUT