name: Docker

on:
  schedule:
    - cron: '0 10 4 * *' # everyday at 4h10

  push:
    # Publish `master` as Docker `latest` image.
    branches:
      - master
      - v*

    # Publish `v1.2.3` tags as releases.
    tags:
      - v*

  # Run tests for any PRs.
  pull_request:

env:
  IMAGE_REPOSITORY: cyrilix
  IMAGE_NAME: robocar-simulator
  PLATFORMS: linux/arm64,linux/amd64,linux/arm/v7

jobs:

  # Push image to GitHub Package Registry.
  # See also https://docs.docker.com/docker-hub/builds/
  push:
    runs-on: ubuntu-latest
    if: github.event_name == 'push'

    steps:
      - uses: actions/checkout@v2

      - name: Repo metadata
        id: repo
        uses: actions/github-script@v3
        with:
          script: |
            const repo = await github.repos.get(context.repo)
            return repo.data

      - name: Prepare
        id: prep
        run: |
          DOCKER_IMAGE=${IMAGE_REPOSITORY}/${IMAGE_NAME}
          VERSION=noop
          if [ "${{ github.event_name }}" = "schedule" ]; then
            VERSION=nightly
          elif [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,' | sed "s/\.x$//" )
          elif [[ $GITHUB_REF == refs/heads/* ]]; then
            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
            if [ "${{ github.event.repository.default_branch }}" = "$VERSION" ]; then
              VERSION=edge
            fi
          elif [[ $GITHUB_REF == refs/pull/* ]]; then
            VERSION=pr-${{ github.event.number }}
          fi
          TAGS="${DOCKER_IMAGE}:${VERSION}"
          if [[ $VERSION =~ ^v[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
            MINOR=${VERSION%.*}
            MAJOR=${MINOR%.*}
            TAGS="$TAGS,${DOCKER_IMAGE}:${MINOR},${DOCKER_IMAGE}:${MAJOR},${DOCKER_IMAGE}:latest"
          elif [ "${{ github.event_name }}" = "push" ]; then
            TAGS="$TAGS,${DOCKER_IMAGE}:sha-${GITHUB_SHA::8}"
          fi
          echo ::set-output name=version::${VERSION}
          echo ::set-output name=tags::${TAGS}
          echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
        with:
          platforms: all

      - name: Docker Setup Buildx
        uses: docker/setup-buildx-action@v1.0.2

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.dockerhub_username }}
          password: ${{ secrets.dockerhub_token }}

      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          file: ./Dockerfile
          platforms: ${{ env.PLATFORMS }}
          push: true
          tags: ${{ steps.prep.outputs.tags }}
          labels: |
            org.opencontainers.image.title=${{ fromJson(steps.repo.outputs.result).name }}
            org.opencontainers.image.description=${{ fromJson(steps.repo.outputs.result).description }}
            org.opencontainers.image.url=${{ fromJson(steps.repo.outputs.result).html_url }}
            org.opencontainers.image.source=${{ fromJson(steps.repo.outputs.result).clone_url }}
            org.opencontainers.image.version=${{ steps.prep.outputs.version }}
            org.opencontainers.image.created=${{ steps.prep.outputs.created }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.licenses=${{ fromJson(steps.repo.outputs.result).license.spdx_id }}