release.yml

name: Release
on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Version override (e.g. v1.2.3). Leave empty to auto-detect via git-cliff.'
        required: false
        default: ''
permissions:
  contents: write
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
      - uses: actions/setup-go@v6
        with:
          go-version-file: go.mod
      - run: go test ./...

  release:
    needs: test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0
          fetch-tags: true
      - uses: actions/setup-go@v6
        with:
          go-version-file: go.mod

      - name: Ensure tags are available
        run: git fetch --force --tags

      - name: Determine version via git-cliff
        id: cliff
        uses: orhun/git-cliff-action@v4
        with:
          config: cliff.toml
          args: --bumped-version

      - name: Resolve release version
        id: version
        run: |
          DETECTED_VERSION="$(echo "${{ steps.cliff.outputs.content }}" | tr -d '[:space:]')"
          if [ -z "$DETECTED_VERSION" ]; then
            LAST_TAG="$(git tag --list 'v*' --sort=-version:refname | head -n1)"
            if [[ -z "$LAST_TAG" ]]; then
              DETECTED_VERSION="v0.1.0"
              echo "git-cliff returned empty; no prior tags found. Falling back to $DETECTED_VERSION"
            elif [[ "$LAST_TAG" =~ ^v([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
              MAJOR="${BASH_REMATCH[1]}"
              MINOR="${BASH_REMATCH[2]}"
              PATCH="${BASH_REMATCH[3]}"
              DETECTED_VERSION="v${MAJOR}.${MINOR}.$((PATCH + 1))"
              echo "git-cliff returned empty; falling back to patch bump from $LAST_TAG -> $DETECTED_VERSION"
            else
              echo "Error: latest tag '$LAST_TAG' is not semver (vX.Y.Z). Set workflow input 'version'." >&2
              exit 1
            fi
          fi

          VERSION="${{ inputs.version }}"
          if [ -z "$VERSION" ]; then
            VERSION="$DETECTED_VERSION"
          fi
          if [ -z "$VERSION" ]; then
            echo "Error: could not determine version. git-cliff returned nothing (no prior tags?). Use the version override input." >&2
            exit 1
          fi
          if git rev-parse -q --verify "refs/tags/$VERSION" >/dev/null; then
            echo "Error: tag '$VERSION' already exists. Set workflow input 'version' to a new value." >&2
            exit 1
          fi

          echo "Releasing $VERSION"
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"

      - name: Generate changelog
        uses: orhun/git-cliff-action@v4
        with:
          config: cliff.toml
          args: --tag ${{ steps.version.outputs.version }} -o CHANGELOG.md

      - name: Commit changelog and create tag locally
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add CHANGELOG.md
          git commit -m "chore: release $VERSION" || echo "No changelog changes to commit"
          git tag -a "$VERSION" -m "$VERSION"

      - name: Ensure clean git state for goreleaser
        run: |
          git clean -ffdx
          if [ -n "$(git status --porcelain)" ]; then
            echo "Error: working tree is dirty before goreleaser." >&2
            git status --porcelain
            exit 1
          fi

      - uses: goreleaser/goreleaser-action@v6
        with:
          version: latest
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          HOMEBREW_TAP_GITHUB_TOKEN: ${{ secrets.HOMEBREW_TAP_GITHUB_TOKEN }}

      - name: Push release commit and tag
        run: git push origin HEAD:main --follow-tags