name: Multiarch build
on:
  push:
  pull_request:
  workflow_dispatch:
  schedule:
    - cron: '0 0 * * *'  # every day at midnight

env:
  PROJECT_DIR: spring-petclinic
  MVN_REPO_DIR: ~/.m2/repository
  IMAGE_TAG: latest

jobs:
  build-multiarch-containerfile:
    name: Build multi-architecture image using Containerfile
    env:
      IMAGE_NAME: hello-world-multiarch
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        arch: [ amd64, i386, arm64v8 ]
        install_latest: [ true, false ]

    steps:

      # Checkout buildah action github repository
      - name: Checkout Buildah action
        uses: actions/checkout@v2
        with:
          path: "buildah-build"

      - name: Install latest buildah
        if: matrix.install_latest
        run: |
          bash buildah-build/.github/install_latest_buildah.sh

      - name: Install qemu dependency
        run: |
          sudo apt-get update
          sudo apt-get install -y qemu-user-static

      - name: Create Containerfile
        run: |
          cat > Containerfile<<EOF

          ARG ARCH
          FROM docker.io/\${ARCH}/alpine:3.14

          RUN echo "hello world"

          ENTRYPOINT [ "sh", "-c", "echo -n 'Machine: ' && uname -m && echo -n 'Bits: ' && getconf LONG_BIT && echo 'goodbye world'" ]
          EOF

      - name: Build Image
        id: build_image_multiarch
        uses: ./buildah-build/
        with:
          image: ${{ env.IMAGE_NAME }}
          tags: ${{ env.IMAGE_TAG }}
          arch: ${{ matrix.arch }}
          build-args: ARCH=${{ matrix.arch }}
          containerfiles: |
            ./Containerfile

      - name: Echo Outputs
        run: |
          echo "Image: ${{ steps.build_image_multiarch.outputs.image }}"
          echo "Tags: ${{ steps.build_image_multiarch.outputs.tags }}"
          echo "Tagged Image: ${{ steps.build_image_multiarch.outputs.image-with-tag }}"

      - name: Check images created
        run: buildah images | grep '${{ env.IMAGE_NAME }}'

      - name: Check image metadata
        run: |
          set -x
          buildah inspect ${{ steps.build_image_multiarch.outputs.image }}:${{ env.IMAGE_TAG }} | jq ".OCIv1.architecture"
          buildah inspect ${{ steps.build_image_multiarch.outputs.image }}:${{ env.IMAGE_TAG }} | jq ".Docker.architecture"

      - name: Run image
        run: |
          podman run --rm ${{ steps.build_image_multiarch.outputs.image }}:${{ env.IMAGE_TAG }}

  build-multiplatform-containerfile:
    name: Build multi-platform image using Containerfile
    env:
      IMAGE_NAME: hello-world-multiplatform
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        platform: [ "linux/amd64", "linux/arm64/v8" ]
        install_latest: [ true, false ]

    steps:

      # Checkout buildah action github repository
      - name: Checkout Buildah action
        uses: actions/checkout@v2
        with:
          path: "buildah-build"

      - name: Install latest buildah
        if: matrix.install_latest
        run: |
          bash buildah-build/.github/install_latest_buildah.sh

      - name: Install qemu dependency
        run: |
          sudo apt-get update
          sudo apt-get install -y qemu-user-static

      - name: Create Containerfile
        run: |
          cat > Containerfile<<EOF

          FROM docker.io/alpine:3.14

          RUN echo "hello world"

          ENTRYPOINT [ "sh", "-c", "echo -n 'Machine: ' && uname -m && echo -n 'Bits: ' && getconf LONG_BIT && echo 'goodbye world'" ]
          EOF

      - name: Build Image
        id: build_image_multiplatform
        uses: ./buildah-build/
        with:
          image: ${{ env.IMAGE_NAME }}
          tags: ${{ env.IMAGE_TAG }}
          platform: ${{ matrix.platform }}
          containerfiles: |
            ./Containerfile

      - name: Echo Outputs
        run: |
          echo "Image: ${{ steps.build_image_multiplatform.outputs.image }}"
          echo "Tags: ${{ steps.build_image_multiplatform.outputs.tags }}"
          echo "Tagged Image: ${{ steps.build_image_multiplatform.outputs.image-with-tag }}"

      - name: Check images created
        run: buildah images | grep '${{ env.IMAGE_NAME }}'

      - name: Check image metadata
        run: |
          set -x
          buildah inspect ${{ steps.build_image_multiplatform.outputs.image }}:${{ env.IMAGE_TAG }} | jq ".OCIv1.architecture"
          buildah inspect ${{ steps.build_image_multiplatform.outputs.image }}:${{ env.IMAGE_TAG }} | jq ".Docker.architecture"

      - name: Run image
        run: |
          podman run --rm ${{ steps.build_image_multiplatform.outputs.image }}:${{ env.IMAGE_TAG }}

  build-multiarch-scratch:
    name: Build multi-architecture image from scratch
    env:
      IMAGE_NAME: spring-petclinic-multiarch
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        arch: [ amd64, i386, arm64v8 ]
        install_latest: [ true, false ]

    steps:

      # Checkout buildah action github repository
      - name: Checkout Buildah action
        uses: actions/checkout@v2
        with:
          path: "buildah-build"

      - name: Install latest buildah
        if: matrix.install_latest
        run: |
          bash buildah-build/.github/install_latest_buildah.sh

      - name: Install qemu dependency
        run: |
          sudo apt-get update
          sudo apt-get install -y qemu-user-static

      # Checkout spring-petclinic github repository
      - name: Checkout spring-petclinic project
        uses: actions/checkout@v2
        with:
          repository: "spring-projects/spring-petclinic"
          path: ${{ env.PROJECT_DIR }}

      # If none of these files has changed, we assume that the contents of
      # .m2/repository can be fetched from the cache.
      - name: Hash Maven files
        working-directory: ${{ env.PROJECT_DIR }}
        run: |
          echo "MVN_HASH=${{ hashFiles('**/pom.xml', '.mvn/**/*', 'mvnw*') }}" >> $GITHUB_ENV

      # Download the m2 repository from the cache to speed up the build.
      - name: Check for Maven cache
        id: check-mvn-cache
        uses: actions/cache@v2
        with:
          path: ${{ env.MVN_REPO_DIR }}
          key: ${{ env.MVN_HASH }}

      # Setup java.
      - name: Setup Java
        uses: actions/setup-java@v1
        with:
          java-version: 11

      # Run maven to build the project
      - name: Maven
        working-directory: ${{ env.PROJECT_DIR }}
        run: |
          mvn package -ntp -B

       # If there was no cache hit above, store the output into the cache now.
      - name: Save Maven repo into cache
        if: ${{ steps.check-mvn-cache.outputs.cache-hit }} != 'true'
        uses: actions/cache@v2
        with:
          path: ${{ env.MVN_REPO_DIR }}
          key: ${{ env.MVN_HASH }}

      - name: Build Image
        id: build_image_multiarch
        uses: ./buildah-build/
        with:
          image: ${{ env.IMAGE_NAME }}
          tags: ${{ env.IMAGE_TAG }}
          base-image: 'registry.access.redhat.com/openjdk/openjdk-11-rhel7'
          arch: ${{ matrix.arch }}
          build-args: ARCH=${{ matrix.arch }}
          # To avoid hardcoding a particular version of the binary.
          content: |
            ./spring-petclinic/target/spring-petclinic-*.jar
          entrypoint: |
            java
            -jar
            spring-petclinic-*.jar
          port: 8080
          workdir: "."

      - name: Echo Outputs
        run: |
          echo "Image: ${{ steps.build_image_multiarch.outputs.image }}"
          echo "Tags: ${{ steps.build_image_multiarch.outputs.tags }}"
          echo "Tagged Image: ${{ steps.build_image_multiarch.outputs.image-with-tag }}"

      - name: Check images created
        run: buildah images | grep '${{ env.IMAGE_NAME }}'

      - name: Check image metadata
        run: |
          set -x
          buildah inspect ${{ steps.build_image_multiarch.outputs.image }}:${{ env.IMAGE_TAG }} | jq ".OCIv1.architecture"
          buildah inspect ${{ steps.build_image_multiarch.outputs.image }}:${{ env.IMAGE_TAG }} | jq ".Docker.architecture"