name: docker

on:
    push:
        branches:
            - unstable
            - stable

env:
    DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
    DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
    IMAGE_NAME: sigp/lighthouse

jobs:
    extract-branch-name:
        runs-on: ubuntu-18.04
        steps:
            - name: Extract branch name
              run: echo "::set-output name=BRANCH_NAME::$(echo ${GITHUB_REF#refs/heads/})"
              id: extract_branch
        outputs:
            BRANCH_NAME: ${{ steps.extract_branch.outputs.BRANCH_NAME }}
    build-docker-arm64:
        runs-on: ubuntu-18.04
        needs: [extract-branch-name]
        # We need to enable experimental docker features in order to use `docker buildx`
        env:
            DOCKER_CLI_EXPERIMENTAL: enabled
        steps:
            - uses: actions/checkout@v2
            - name: Dockerhub login
              run: |
                  echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
            - name: Cross build lighthouse binary
              run:  |
                  cargo install cross
                  make build-aarch64-portable
            - name: Move cross-built ARM binary into Docker scope
              run: |
                  mkdir ./bin;
                  mv ./target/aarch64-unknown-linux-gnu/release/lighthouse ./bin;
            - name: Set Env
              if: needs.extract-branch-name.outputs.BRANCH_NAME == 'unstable'
              run: |
                  echo "TAG_SUFFIX=-unstable" >> $GITHUB_ENV;
            # Install dependencies for emulation. Have to create a new builder to pick up emulation support.
            - name: Build ARM64 dockerfile (with push)
              run: |
                  docker run --privileged --rm tonistiigi/binfmt --install arm64
                  docker buildx create --use --name cross-builder
                  docker buildx build \
                      --platform=linux/arm64 \
                      --file ./Dockerfile.cross . \
                      --tag ${IMAGE_NAME}:latest-arm64${TAG_SUFFIX} \
                      --push
    build-docker-amd64:
        runs-on: ubuntu-18.04
        needs: [extract-branch-name]
        steps:
            - uses: actions/checkout@v2
            - name: Dockerhub login
              run: |
                  echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
            - name: Set Env
              if: needs.extract-branch-name.outputs.BRANCH_NAME == 'unstable'
              run: |
                  echo "TAG_SUFFIX=-unstable" >> $GITHUB_ENV;
            - name: Build AMD64 dockerfile (with push)
              run: |
                  docker build \
                      --build-arg PORTABLE=true \
                      --tag ${IMAGE_NAME}:latest-amd64${TAG_SUFFIX} \
                      --file ./Dockerfile .
                  docker push ${IMAGE_NAME}:latest-amd64${TAG_SUFFIX}
    build-docker-multiarch:
        runs-on: ubuntu-18.04
        needs: [build-docker-arm64, build-docker-amd64, extract-branch-name]
        # We need to enable experimental docker features in order to use `docker manifest`
        env:
            DOCKER_CLI_EXPERIMENTAL: enabled
        steps:
            - name: Dockerhub login
              run: |
                  echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
            - name: Set Env
              if: needs.extract-branch-name.outputs.BRANCH_NAME == 'unstable'
              run: |
                  echo "TAG_SUFFIX=-unstable" >> $GITHUB_ENV;
            - name: Create and push multiarch manifest
              run: |
                  docker manifest create ${IMAGE_NAME}:latest${TAG_SUFFIX} \
                      --amend ${IMAGE_NAME}:latest-arm64${TAG_SUFFIX} \
                      --amend ${IMAGE_NAME}:latest-amd64${TAG_SUFFIX};
                  docker manifest push ${IMAGE_NAME}:latest${TAG_SUFFIX}