[release-1.35] feat: add automation to create release tags

tools/auto-tag.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+
+# Copyright 2026 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]}")/..
+cd "${KUBE_ROOT}"
+
+DRY_RUN=${DRY_RUN:-true}
+FORCE_BRANCH=${FORCE_BRANCH:-""}
+
+# Get branch name
+BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)
+
+if [[ -n "$FORCE_BRANCH" ]]; then
+    echo "Forcing branch name to: $FORCE_BRANCH"
+    BRANCH_NAME="$FORCE_BRANCH"
+fi
+
+echo "Current branch: $BRANCH_NAME"
+
+# Enforce release branch
+if [[ ! "$BRANCH_NAME" =~ ^release-1\.([0-9]+)$ ]]; then
+    echo "ERROR: This script must be run only in a release branch (release-1.X)."
+    exit 1
+fi
+
+# Get version from go.mod
+VERSION_STRING=$(grep -E 'k8s.io/client-go' go.mod | grep -oE 'v0\.[0-9]+\.[0-9]+' | head -n 1)
+echo "Found client-go version string: $VERSION_STRING"
+
+if [[ "$VERSION_STRING" =~ v0\.([0-9]+)\.([0-9]+) ]]; then
+    MINOR="${BASH_REMATCH[1]}"
+    PATCH="${BASH_REMATCH[2]}"
+    echo "Extracted version parameters: MINOR=$MINOR, PATCH=$PATCH"
+else
+    echo "Could not determine client-go version from go.mod"
+    exit 1
+fi
+
+TAG_PREFIX="v$MINOR.$PATCH."
+echo "Tag prefix: $TAG_PREFIX"
+
+# Fetch tags
+echo "Fetching tags..."
+git fetch --tags
+
+# Find largest tag
+TAGS=$(git tag -l "$TAG_PREFIX*")
+
+LARGEST_CCM_PATCH=-1
+for t in $TAGS; do
+    if [[ "$t" =~ ^v$MINOR\.$PATCH\.([0-9]+)$ ]]; then
+        p="${BASH_REMATCH[1]}"
+        if (( p > LARGEST_CCM_PATCH )); then
+            LARGEST_CCM_PATCH=$p
+        fi
+    fi
+done
+
+CCM_PATCH=$((LARGEST_CCM_PATCH + 1))
+NEW_TAG="v$MINOR.$PATCH.$CCM_PATCH"
+
+echo "Calculated new tag: $NEW_TAG"
+
+if [ "$DRY_RUN" = "true" ]; then
+    echo "DRY RUN: Skipping tag creation and push."
+    echo "To create the tag, run with DRY_RUN=false"
+    exit 0
+fi
+
+echo "Creating tag $NEW_TAG..."
+git tag "$NEW_TAG" -m "CCM build for Kubernetes v1.$MINOR.$PATCH"
+
+echo "Pushing tag $NEW_TAG..."
+git push origin "$NEW_TAG"
+
+echo "Successfully created and pushed tag $NEW_TAG"