name: Docker multi-arch build and push

on:
  push:
  pull_request:


jobs:
  build:
    name: Build Docker image (${{ matrix.arch }})
    runs-on: ubuntu-latest
    env:
      IMAGE_TAG: ghcr.io/${{ github.repository_owner }}/tdlightbotapi
      IMAGE_TAG_DH: ${{ secrets.DOCKERHUB_OWNER }}/tdlightbotapi
    strategy:
      matrix:
        arch: [linux/386, linux/amd64, linux/arm/v6, linux/arm/v7, linux/arm64, linux/ppc64le]

    steps:
      - name: Checkout current repo
        uses: actions/checkout@v2
        with:
          submodules: "recursive"

      - name: Get version
        run: |
          # Get latest commit short hash
          HASH_VERSION=$(git rev-parse --short HEAD)

          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
        
          # Strip "v" prefix from tag name
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
        
          # Use Docker `latest` tag convention
          [ "$VERSION" == "master" ] && VERSION=latest
 
          # Convert IMAGE_TAG, HASH_VERSION and VERSION to lowercase (repository name must be lowercase)
          IMAGE_TAG=$(echo "$IMAGE_TAG" | awk '{print tolower($0)}')
          IMAGE_TAG_DH=$(echo "$IMAGE_TAG_DH" | awk '{print tolower($0)}')
          HASH_VERSION=$(echo "$HASH_VERSION" | awk '{print tolower($0)}')
          VERSION=$(echo "$VERSION" | awk '{print tolower($0)}')
          ARCH=${{ matrix.arch }}
          SAFE_ARCH=${ARCH///}  # linux/amd64 -> linuxamd64

          # Store variable for future use
          echo "IMAGE_TAG=$IMAGE_TAG" >> $GITHUB_ENV
          echo "IMAGE_TAG_DH=$IMAGE_TAG_DH" >> $GITHUB_ENV
          echo "HASH_VERSION=$HASH_VERSION" >> $GITHUB_ENV
          echo "VERSION=$VERSION" >> $GITHUB_ENV
          echo "SAFE_ARCH=$SAFE_ARCH" >> $GITHUB_ENV

          # Print debug info
          echo "hash version: $HASH_VERSION"
          echo "version: $VERSION"
          echo "safe arch: $SAFE_ARCH"

          # Save env to file
          cat $GITHUB_ENV > github.env

      - name: Upload environment info as artifact
        uses: actions/upload-artifact@v2
        with:
          name: github_env
          path: github.env

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

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

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ env.SAFE_ARCH }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-${{ env.SAFE_ARCH }}-

      - name: Login to ghcr registry
        uses: docker/login-action@v1
        if: ${{ github.event_name != 'pull_request' }}
        with:
          registry: ghcr.io
          username: ${{ secrets.GH_USERNAME }}
          password: ${{ secrets.GH_ACCESS_TOKEN }}

      - name: Login to Docker Hub registry
        uses: docker/login-action@v1
        if: ${{ github.event_name != 'pull_request' }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}

      - name: Build image
        uses: docker/build-push-action@v2
        with:
          context: .
          file: ./Dockerfile
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache
          platforms: ${{ matrix.arch }}
          push: false
          load: true
          tags: |
            tdlightbotapi:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }}

      - name: Tag and push image
        if: ${{ github.event_name != 'pull_request' }}
        run: |
          docker tag tdlightbotapi:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }} ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }}
          docker tag tdlightbotapi:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }} ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-${{ env.SAFE_ARCH }}
          docker tag tdlightbotapi:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }} ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }}
          docker tag tdlightbotapi:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }} ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-${{ env.SAFE_ARCH }}
          docker push ${{ env.IMAGE_TAG}}:${{ env.HASH_VERSION}}-${{ env.SAFE_ARCH }}
          docker push ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-${{ env.SAFE_ARCH }}
          docker push ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }}
          docker push ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-${{ env.SAFE_ARCH }}

      - name: Save image as tar archive
        if: ${{ github.event_name != 'pull_request' }}
        run: |
          docker save ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }} -o ${{ env.SAFE_ARCH }}.tar

      - name: Save image as tar archive (pull request)
        if: ${{ github.event_name == 'pull_request' }}
        run: |
          docker save tdlightbotapi:${{ env.HASH_VERSION }}-${{ env.SAFE_ARCH }} -o ${{ env.SAFE_ARCH }}.tar

      - name: Upload image as artifact
        uses: actions/upload-artifact@v2
        with:
          name: image_${{ env.SAFE_ARCH }}
          path: ${{ env.SAFE_ARCH }}.tar

  push-manifest:
    name: Create and push multi-arch Docker manifest
    runs-on: ubuntu-latest
    if: ${{ github.event_name != 'pull_request' }}
    env:
      DOCKER_CLI_EXPERIMENTAL: enabled
    needs: build

    steps:
      - name: Download artifacts
        uses: actions/download-artifact@v2

      - name: Load environment info and built images
        run: |
          cat github_env/github.env > $GITHUB_ENV
          docker load --input image_linux386/linux386.tar
          docker load --input image_linuxamd64/linuxamd64.tar
          docker load --input image_linuxarmv6/linuxarmv6.tar
          docker load --input image_linuxarmv7/linuxarmv7.tar
          docker load --input image_linuxarm64/linuxarm64.tar
          docker load --input image_linuxppc64le/linuxppc64le.tar

      - name: Login to ghcr registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ secrets.GH_USERNAME }}
          password: ${{ secrets.GH_ACCESS_TOKEN }}

      - name: Login to Docker Hub registry
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}

      - name: Create and push manifest
        run: |
          # -- Push to ghcr.io
          docker manifest create ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }} \
          --amend ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linux386 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxamd64 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv6 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv7 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarm64 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxppc64le
          docker manifest push ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}

          # Tag images as VERSION (like 'latest')
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linux386 ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linux386
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxamd64 ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxamd64
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv6 ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxarmv6
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv7 ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxarmv7
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarm64 ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxarm64
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxppc64le ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxppc64le

          docker manifest create ${{ env.IMAGE_TAG }}:${{ env.VERSION }} \
          --amend ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linux386 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxamd64 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxarmv6 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxarmv7 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxarm64 \
          --amend ${{ env.IMAGE_TAG }}:${{ env.VERSION }}-linuxppc64le
          docker manifest push ${{ env.IMAGE_TAG }}:${{ env.VERSION }}

          # -- Push to Docker Hub
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linux386 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linux386
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxamd64 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxamd64
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv6 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarmv6
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv7 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarmv7
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarm64 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarm64
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxppc64le ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxppc64le

          docker manifest create ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }} \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-linux386 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-linuxamd64 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-linuxarmv6 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-linuxarmv7 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-linuxarm64 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}-linuxppc64le
          docker manifest push ${{ env.IMAGE_TAG_DH }}:${{ env.HASH_VERSION }}

          # Tag images as VERSION (like 'latest')
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linux386 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linux386
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxamd64 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxamd64
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv6 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarmv6
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarmv7 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarmv7
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxarm64 ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarm64
          docker tag ${{ env.IMAGE_TAG }}:${{ env.HASH_VERSION }}-linuxppc64le ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxppc64le

          docker manifest create ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }} \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linux386 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxamd64 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarmv6 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarmv7 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxarm64 \
          --amend ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}-linuxppc64le
          docker manifest push ${{ env.IMAGE_TAG_DH }}:${{ env.VERSION }}