chore: Add automatic tag and branch creation, triggered by version/TAG_VERSION

.github/workflows/tag-release.yaml

@@ -0,0 +1,23 @@
+name: 'Tag Release'
+
+on:
+  push:
+    branches:
+      - master
+      - 'release-*'
+    paths:
+      - version/*
+
+jobs:
+  tag-release:
+    if: ${{ github.repository == 'kubernetes-sigs/kubebuilder-declarative-pattern' }}
+    runs-on: ubuntu-24.04
+
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      - run: /usr/bin/git config --global user.email [email protected]
+      - run: /usr/bin/git config --global user.name 'GitHub Actions Release Tagger'
+      - run: dev/bots/projectbots/tag-release

dev/bots/projectbots/tag-release

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+#!/bin/bash
+
+# Copyright 2025 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.
+
+
+# Helper script to tag a release when the version/TAG_VERSION file is updated.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+VERSION=$(cat version/TAG_VERSION)
+
+if [[ ! "${VERSION}" =~ ^([0-9]+[.][0-9]+)[.]([0-9]+)(-(alpha|beta)[.]([0-9]+))?$ ]]; then
+  echo "Version ${VERSION} must be 'X.Y.Z', 'X.Y.Z-alpha.N', or 'X.Y.Z-beta.N'"
+  exit 1
+fi
+
+# Store the minor version for use in the branch creation.
+# We want to capture this value now before we do another regex match.
+MINOR=${BASH_REMATCH[1]}
+RELEASE_BRANCH="release-${MINOR}"
+
+if [ "$(git tag -l "v${VERSION}")" ]; then
+  echo "Tag v${VERSION} already exists"
+  exit 0
+fi
+
+echo "Tagging Release ${VERSION}"
+git tag -a -m "Release ${VERSION}" "v${VERSION}"
+git push origin "v${VERSION}"
+
+# Create the release branch automatically on the first beta release.
+if [[ ! "${VERSION}" =~ .0-beta.1$ ]]; then
+  exit 0
+fi
+
+echo "Creating Release Branch ${RELEASE_BRANCH}"
+git branch "${RELEASE_BRANCH}"
+git push origin "${RELEASE_BRANCH}"

version/README.md

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+The files in this directory allow for github repo tagging to be controlled by Pull Request (and go through approval).
+
+These files are watched by the github actions defined in [tag-release.yaml](/.github/workflows/tag-release.yaml).

version/TAG_VERSION

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+0.15.0-beta.2