release.yml

on:
  push:
    branches: [ "release" ]

permissions:
  contents: write
  packages: write
  id-token: write
jobs:
  release:
    name: Release
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Set up JDK
        uses: actions/setup-java@v4
        with:
          distribution: "liberica"
          java-version: "21"
          cache: gradle
      - name: Compute next SemVer and tag
        id: semver
        uses: paulhatch/semantic-version@v5.4.0
        with:
          tag_prefix: "v"
          major_pattern: "/!:|BREAKING CHANGE:/"
          minor_pattern: "/feat(\\(.+\\))?:/"
          version_format: "${major}.${minor}.${patch}"
      - name: Create and push tag
        run: |
          VERSION="${{ steps.semver.outputs.version }}"
          TAG="v${VERSION}"

          # If tag already exists, do nothing
          if git rev-parse "$TAG" >/dev/null 2>&1; then
            echo "Tag $TAG already exists; skipping tag push."
            exit 0
          fi

          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git tag -a "$TAG" -m "Release $TAG"
          git push origin "$TAG"

          echo "version=$VERSION" >> $GITHUB_OUTPUT
      - name: Determine version to use
        id: version
        run: |
          # Prefer tag-created version output; fallback to computed output
          VERSION="${{ steps.semver.outputs.version }}"
          echo "version=$VERSION" >> $GITHUB_OUTPUT
      - name: Run tests
        run: ./gradlew test
      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ghcr.io/${{ github.repository }}
          tags: |
            type=raw,value=${{ steps.version.outputs.version }}
            type=raw,value=latest
      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            APP_VERSION=${{ steps.version.outputs.version }}