release.yml

name: release
on:
  # Test that it works on pull_request; 
  # goreleaser goes into snapshot mode if not a tag; 
  # docker image will be built but not pushed for pull requests.
  pull_request:
  push:
    tags:
      - v*

permissions:
  # goreleaser writes to the releases api
  contents: write

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}

jobs:
  goreleaser:
    runs-on: ubuntu-latest
    env:
      flags: ""
    steps:
      - if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
        run: echo "flags=--snapshot" >> $GITHUB_ENV
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - run: git fetch --force --tags
      - uses: actions/setup-go@v5
        with:
          go-version-file: 'go.mod'
          cache: true
      - uses: goreleaser/goreleaser-action@v5
        with:
          version: latest
          args: release --rm-dist ${{ env.flags }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  docker-release:
    runs-on: ubuntu-latest
    permissions:
      # docker writes packages to container registry
      packages: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - run: git fetch --force --tags
      - name: Log in to the Container registry
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5.4.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
      - name: Build and push Docker image (image is not pushed on pull request)
        uses: docker/build-push-action@v5.1.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}