name: Build Container Image

# When its time to do a release do a full cross platform build for all supported
# architectures and push all of them to Docker Hub.
# Only trigger on semver shaped tags.
# Ref: https://github.com/metcalfc/docker-action-examples/blob/main/.github/workflows/release.yml
on:
  push:
    paths:
      - "alpine/4/**"

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Prepare
        id: prep
        run: |
          DOCKER_IMAGE=invoiceninja/invoiceninja
          VERSION=edge
          if [[ $GITHUB_REF == refs/tags/* ]]; then
            VERSION=${GITHUB_REF#refs/tags/}
          fi
          TAGS="${DOCKER_IMAGE}:${VERSION}"
          MAJOR="$(echo "${VERSION}" | cut -d. -f1)"
          MINOR="$(echo "${VERSION}" | cut -d. -f2)"
          TAGS="$TAGS,${DOCKER_IMAGE}:${MAJOR},${DOCKER_IMAGE}:${MAJOR}.${MINOR}"
          if [[ $VERSION =~ ^5\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
            TAGS="$TAGS,${DOCKER_IMAGE}:latest"
          fi
          echo ::set-output name=tags::${TAGS}
          echo ::set-output name=version::${VERSION}
          echo ::set-output name=major::${MAJOR}

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

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ hashFiles('alpine/**') }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Build
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: ./alpine/${{ steps.prep.outputs.major }}/
          build-args: INVOICENINJA_VERSION=${{ steps.prep.outputs.version }}
          target: prod
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.prep.outputs.tags }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache