name: docker

on:
    push:
        branches:
            - unstable
            - stable
        tags:
            - v*

env:
    DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
    DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
    IMAGE_NAME: ${{ github.repository_owner}}/lighthouse
    LCLI_IMAGE_NAME: ${{ github.repository_owner }}/lcli

jobs:
    # Extract the VERSION which is either `latest` or `vX.Y.Z`, and the VERSION_SUFFIX
    # which is either empty or `-unstable`.
    #
    # It would be nice if the arch didn't get spliced into the version between `latest` and
    # `unstable`, but for now we keep the two parts of the version separate for backwards
    # compatibility.
    extract-version:
        runs-on: ubuntu-18.04
        steps:
            - name: Extract version (if stable)
              if: github.event.ref == 'refs/heads/stable'
              run: |
                    echo "VERSION=latest" >> $GITHUB_ENV
                    echo "VERSION_SUFFIX=" >> $GITHUB_ENV
            - name: Extract version (if unstable)
              if: github.event.ref == 'refs/heads/unstable'
              run: |
                    echo "VERSION=latest" >> $GITHUB_ENV
                    echo "VERSION_SUFFIX=-unstable" >> $GITHUB_ENV
            - name: Extract version (if tagged release)
              if: startsWith(github.event.ref, 'refs/tags')
              run: |
                    echo "VERSION=$(echo ${GITHUB_REF#refs/tags/})" >> $GITHUB_ENV
                    echo "VERSION_SUFFIX=" >> $GITHUB_ENV
        outputs:
            VERSION: ${{ env.VERSION }}
            VERSION_SUFFIX: ${{ env.VERSION_SUFFIX }}
    build-docker-single-arch:
        name: build-docker-${{ matrix.binary }}
        runs-on: ubuntu-18.04
        strategy:
            matrix:
                binary: [aarch64,
                         aarch64-portable,
                         x86_64,
                         x86_64-portable]
                include:
                    - profile: maxperf

        needs: [extract-version]
        env:
            # We need to enable experimental docker features in order to use `docker buildx`
            DOCKER_CLI_EXPERIMENTAL: enabled
            VERSION: ${{ needs.extract-version.outputs.VERSION }}
            VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
        steps:
            - uses: actions/checkout@v2
            - name: Update Rust
              run: rustup update stable
            - name: Dockerhub login
              run: |
                  echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
            - name: Cross build Lighthouse binary
              run: |
                  cargo install cross
                  env CROSS_PROFILE=${{ matrix.profile }} make build-${{ matrix.binary }}
            - name: Move cross-built binary into Docker scope (if ARM)
              if: startsWith(matrix.binary, 'aarch64')
              run: |
                  mkdir ./bin;
                  mv ./target/aarch64-unknown-linux-gnu/${{ matrix.profile }}/lighthouse ./bin;
            - name: Move cross-built binary into Docker scope (if x86_64)
              if: startsWith(matrix.binary, 'x86_64')
              run: |
                  mkdir ./bin;
                  mv ./target/x86_64-unknown-linux-gnu/${{ matrix.profile }}/lighthouse ./bin;
            - name: Map aarch64 to arm64 short arch
              if: startsWith(matrix.binary, 'aarch64')
              run: echo "SHORT_ARCH=arm64" >> $GITHUB_ENV
            - name: Map x86_64 to amd64 short arch
              if: startsWith(matrix.binary, 'x86_64')
              run: echo "SHORT_ARCH=amd64" >> $GITHUB_ENV;
            - name: Set modernity suffix
              if: endsWith(matrix.binary, '-portable') != true
              run: echo "MODERNITY_SUFFIX=-modern" >> $GITHUB_ENV;
            # Install dependencies for emulation. Have to create a new builder to pick up emulation support.
            - name: Build Dockerfile and push
              run: |
                  docker run --privileged --rm tonistiigi/binfmt --install ${SHORT_ARCH}
                  docker buildx create --use --name cross-builder
                  docker buildx build \
                      --platform=linux/${SHORT_ARCH} \
                      --file ./Dockerfile.cross . \
                      --tag ${IMAGE_NAME}:${VERSION}-${SHORT_ARCH}${VERSION_SUFFIX}${MODERNITY_SUFFIX} \
                      --push
    build-docker-multiarch:
        name: build-docker-multiarch${{ matrix.modernity }}
        runs-on: ubuntu-18.04
        needs: [build-docker-single-arch, extract-version]
        strategy:
            matrix:
                modernity: ["", "-modern"]
        env:
            # We need to enable experimental docker features in order to use `docker manifest`
            DOCKER_CLI_EXPERIMENTAL: enabled
            VERSION: ${{ needs.extract-version.outputs.VERSION }}
            VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
        steps:
            - name: Dockerhub login
              run: |
                  echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
            - name: Create and push multiarch manifest
              run: |
                  docker manifest create ${IMAGE_NAME}:${VERSION}${VERSION_SUFFIX}${{ matrix.modernity }} \
                      --amend ${IMAGE_NAME}:${VERSION}-arm64${VERSION_SUFFIX}${{ matrix.modernity }} \
                      --amend ${IMAGE_NAME}:${VERSION}-amd64${VERSION_SUFFIX}${{ matrix.modernity }};
                  docker manifest push ${IMAGE_NAME}:${VERSION}${VERSION_SUFFIX}${{ matrix.modernity }}
    build-docker-lcli:
        runs-on: ubuntu-18.04
        needs: [extract-version]
        env:
            VERSION: ${{ needs.extract-version.outputs.VERSION }}
            VERSION_SUFFIX: ${{ needs.extract-version.outputs.VERSION_SUFFIX }}
        steps:
            - uses: actions/checkout@v2
            - name: Dockerhub login
              run: |
                  echo "${DOCKER_PASSWORD}" | docker login --username ${DOCKER_USERNAME} --password-stdin
            - name: Build lcli dockerfile (with push)
              run: |
                  docker build \
                      --build-arg PORTABLE=true \
                      --tag ${LCLI_IMAGE_NAME}:${VERSION}${VERSION_SUFFIX} \
                      --file ./lcli/Dockerfile .
                  docker push ${LCLI_IMAGE_NAME}:${VERSION}${VERSION_SUFFIX}