Add github action for updating major tag

.github/workflows/update-major-version-tag.yml

@@ -0,0 +1,64 @@
+name: Update Major Version Tag
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'The full version tag to process (e.g., v13.1.0)'
+        required: true
+        type: string
+
+jobs:
+  update-major-tag:
+    name: Update Major Version Tag
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get tag name
+        id: get-tag
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            TAG="${{ inputs.tag }}"
+          else
+            TAG="${GITHUB_REF#refs/tags/}"
+          fi
+          echo "tag=$TAG" >> $GITHUB_OUTPUT
+          # Extract major version (e.g., v13 from v13.1.0)
+          MAJOR_TAG=$(echo "$TAG" | sed -E 's/^(v[0-9]+)\..*/\1/')
+          echo "major_tag=$MAJOR_TAG" >> $GITHUB_OUTPUT
+
+      - name: Update major version tag
+        run: |
+          TAG="${{ steps.get-tag.outputs.tag }}"
+          MAJOR_TAG="${{ steps.get-tag.outputs.major_tag }}"
+
+          echo "Processing tag: $TAG"
+          echo "Major version tag: $MAJOR_TAG"
+
+          # Configure git
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+          # Get the commit SHA for the pushed tag
+          COMMIT_SHA=$(git rev-list -n 1 "$TAG")
+          echo "Commit SHA: $COMMIT_SHA"
+
+          # Delete the major tag locally if it exists
+          git tag -d "$MAJOR_TAG" 2>/dev/null || true
+
+          # Create/update the major version tag pointing to the same commit
+          git tag "$MAJOR_TAG" "$COMMIT_SHA"
+
+          # Force push the major version tag to origin
+          git push origin "$MAJOR_TAG" --force
+
+          echo "Successfully updated $MAJOR_TAG to point to $TAG ($COMMIT_SHA)"

README.md

@@ -105,6 +105,15 @@ jobs:
 
 For more application cases please check [Smoke Test Workflow file](https://github.com/DeLaGuardo/setup-clojure/blob/main/.github/workflows/smoke-tests.yml)
 
+# Versioning
+
+You can reference this action using either:
+
+- **Full version** (e.g., `DeLaGuardo/[email protected]`) - pins to a specific release
+- **Major version** (e.g., `DeLaGuardo/setup-clojure@v13`) - automatically receives all minor and patch updates within that major version
+
+Using the major version tag is recommended for most users, as it ensures you receive bug fixes and new features without breaking changes.
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE)