docker.yml

name: Publish Docker image
on:
  release:
    types: [published]
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]
  schedule:
    - cron: '0 21 * * 6' # run every Saturday at 21

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  push_to_registries:
    name: Push Docker image to docker hub
    runs-on: ubuntu-24.04
    env:
      IMAGE_NAME: ${{ github.repository }}
    steps:
      - name: Check out the repo
        uses: actions/checkout@v4
      - name: R setup
        uses: r-lib/actions/setup-r@v2
      - name: Build package (tarball)
        run: R CMD build .
      - name: Lint Dockerfile
        uses: brpaz/hadolint-action@master
        with:
          dockerfile: "Dockerfile"
      - name: Prepare tags
        id: docker_meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Login to DockerHub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Push to Docker Hub
        uses: docker/build-push-action@v2
        with:
          context: .
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}