docker-publish.yml

name: Docker build and publish

on:
  push:
    branches: [ master ]

concurrency:
  # When this is not a pull request, then we want all the docker containers to be pushed, we therefore
  # directly fall back to the commit hash which will be distinct for each push to master.
  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.sha}}'
  cancel-in-progress: true

jobs:
  docker:
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Get short sha
        id: sha
        run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
      - name: Get PR number
        id: pr
        run: echo "pr_num=$(git log --format=%s -n 1 | sed -nr 's/.*\(\#([0-9]+)\)/\1/p')" >> $GITHUB_OUTPUT

      - name: Generate image metadata
        id: meta
        uses: docker/metadata-action@v5
        env:
          # We build multiplatform images which have an image index above the
          # image manifests. Attach the annotations directly to the image index.
          DOCKER_METADATA_ANNOTATIONS_LEVELS: "index"

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          platforms: linux/amd64,linux/arm64

          # Push to dockerhub, reuse the cached steps from the previous build.
          push: true

          # If this is a push on master, publish with short commit sha
          # else use the ref name, which has to be the tag in this case.
          # We have to explicitly add the "qlever:latest" tag for it to work correctly,
          # see e.g. https://stackoverflow.com/questions/27643017/do-i-need-to-manually-tag-latest-when-pushing-to-docker-public-repository
          tags: >
            adfreiburg/qlever-ui:latest,

          # Set Annotations and Labels that conform to the OpenContainers
          # Annotations Spec
          annotations: ${{ steps.meta.outputs.annotations }}
          labels: ${{ steps.meta.outputs.labels }}