Add workflow to update major release tag

Author: magicjar

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

@@ -0,0 +1,38 @@
+name: Update Major Tag
+
+on:
+  release:
+    types:
+      - published
+
+permissions:
+  contents: write
+
+jobs:
+  move-major-tag:
+    runs-on: ubuntu-latest
+    if: startsWith(github.event.release.tag_name, 'v')
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "github-actions"
+          git config user.email "[email protected]"
+
+      - name: Move major tag
+        env:
+          RELEASE_TAG: ${{ github.event.release.tag_name }}
+        run: |
+          if ! echo "$RELEASE_TAG" | grep -Eq '^v[0-9]+\.[0-9]+\.[0-9]+$'; then
+            echo "Release tag $RELEASE_TAG is not a v*.*.* semver tag. Skipping." >&2
+            exit 0
+          fi
+          git fetch origin "refs/tags/$RELEASE_TAG:refs/tags/$RELEASE_TAG"
+          COMMIT=$(git rev-list -n 1 "$RELEASE_TAG")
+          MAJOR_TAG=$(echo "$RELEASE_TAG" | sed -E 's/^v([0-9]+)\..*/v\1/')
+          git tag -fa "$MAJOR_TAG" "$COMMIT" -m "Align $MAJOR_TAG with $RELEASE_TAG"
+          git push origin "$MAJOR_TAG" --force