name: Test and Build multi-architecture
on:
  push:
    branches:
      - master
      - test/**
    tags:
      - "[0-9]+.[0-9]+.[0-9]+"
    paths-ignore:
      - "*.md"
      - "docs/**"
      - "examples/**"

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        # NOTE: the "latest" variant is identified in the Docker meta step's 'latest' config
        variant:
          - java19
          - java17
          - java17-graalvm-ce
          - java17-jdk
          - java17-openj9
          - java17-alpine
          - java8
          - java8-graalvm-ce
          - java8-multiarch
          - java8-openj9
          - java8-jdk
          - java11
          - java11-openj9
          - java11-jdk
        include:
        # JAVA 19:
          - variant: java19
            baseImage: eclipse-temurin:19-jre-jammy
            platforms: linux/amd64,linux/arm/v7,linux/arm64
            mcVersion: 1.19.3
        # JAVA 17:
          - variant: java17
            # jammy doesn't work until minecraft updates to https://github.com/netty/netty/issues/12343
            baseImage: eclipse-temurin:17-jre-focal
            platforms: linux/amd64,linux/arm/v7,linux/arm64
            mcVersion: 1.18.2
          - variant: java17-graalvm-ce
            baseImage: ghcr.io/graalvm/graalvm-ce:ol8-java17
            platforms: linux/amd64,linux/arm64
            mcVersion: 1.18.2
          - variant: java17-jdk
            baseImage: eclipse-temurin:17-focal
            platforms: linux/amd64,linux/arm/v7,linux/arm64
            mcVersion: 1.18.2
          - variant: java17-openj9
            baseImage: ibm-semeru-runtimes:open-17-jre
            platforms: linux/amd64,linux/arm64
            mcVersion: 1.18.2
          - variant: java17-alpine
            baseImage: eclipse-temurin:17-jre-alpine
            platforms: linux/amd64
            mcVersion: 1.18.2
        # JAVA 11:
          - variant: java11
            baseImage: adoptopenjdk:11-jre-hotspot
            platforms: linux/amd64,linux/arm/v7,linux/arm64
            mcVersion: 1.16.5
          - variant: java11-jdk
            baseImage: adoptopenjdk:11-jdk-hotspot
            platforms: linux/amd64,linux/arm/v7,linux/arm64
            mcVersion: 1.16.5
          - variant: java11-openj9
            baseImage: ibm-semeru-runtimes:open-11-jre
            platforms: linux/amd64,linux/arm64
            mcVersion: 1.16.5
        # JAVA 8: NOTE: Unable to go past 8u312 because of Forge dependencies
          - variant: java8
            baseImage: openjdk:8-jre-alpine3.9
            platforms: linux/amd64
            mcVersion: 1.12.2
          - variant: java8-graalvm-ce
            baseImage: ghcr.io/graalvm/graalvm-ce:java8
            platforms: linux/amd64
            mcVersion: 1.12.2
          - variant: java8-multiarch
            baseImage: eclipse-temurin:8u312-b07-jre-focal
            platforms: linux/amd64,linux/arm/v7,linux/arm64
            mcVersion: 1.12.2
          - variant: java8-jdk
            baseImage: eclipse-temurin:8u312-b07-jdk-focal
            platforms: linux/amd64,linux/arm64
            mcVersion: 1.12.2
          - variant: java8-openj9
            baseImage: ibm-semeru-runtimes:open-8u312-b07-jre
            platforms: linux/amd64,linux/arm64
            mcVersion: 1.12.2
    env:
      IMAGE_TO_TEST: ${{ github.repository_owner }}/minecraft-server:test-${{ matrix.variant }}-${{ github.run_id }}
      HAS_IMAGE_REPO_ACCESS: ${{ secrets.DOCKER_USER != '' && secrets.DOCKER_PASSWORD != '' }}
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          # for build-files step
          fetch-depth: 0

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          # NOTE for forks: if your Docker Hub organization doesn't match your Github repo's,
          # then the use of ${{ github.repository_owner }} will need to be replaced.
          images: |
            ${{ github.repository_owner }}/minecraft-server
          tags: |
            type=ref,event=tag,enable=${{ matrix.variant == 'java17' }}
            type=ref,event=tag,suffix=-${{ matrix.variant }}
            type=raw,value=${{ matrix.variant }}
          # NOTE this identifies which variant will be published as "latest", which isn't
          # necessarily the newest version of Java
          flavor: |
            latest=${{ matrix.variant == 'java17' }}
          labels: |
            org.opencontainers.image.authors=Geoff Bourne <itzgeoff@gmail.com>

      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2.1.0

      - name: Build for test
        uses: docker/build-push-action@v3.3.0
        with:
          platforms: linux/amd64
          tags: ${{ env.IMAGE_TO_TEST }}
          # ensure latest base image is used
          pull: true
          # load into daemon for test usage in next step
          load: true
          push: false
          build-args: |
            BASE_IMAGE=${{ matrix.baseImage }}
          cache-from: type=gha,scope=${{ matrix.variant }}
          # no cache-to to avoid cross-cache update from next build step

      - name: Run tests
        env:
          MINECRAFT_VERSION: ${{ matrix.mcVersion }}
          VARIANT: ${{ matrix.variant }}
          MODS_FORGEAPI_KEY: ${{ secrets.MODS_FORGEAPI_KEY }}
        run: |
          tests/test.sh

      - name: Login to DockerHub
        uses: docker/login-action@v2
        if: env.HAS_IMAGE_REPO_ACCESS
        with:
          username: ${{ secrets.DOCKER_USER }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and push
        uses: docker/build-push-action@v3.3.0
        if: github.actor == github.repository_owner
        with:
          platforms: ${{ matrix.platforms }}
          push: >
            ${{ 
            github.ref_type == 'tag' 
            || github.ref_name == 'master' 
            || ( github.event_name == 'pull_request' 
                 && env.HAS_IMAGE_REPO_ACCESS 
                 && contains(github.event.pull_request.labels.*.name, 'ci/push-image') 
               )
            }}
          tags: ${{ steps.meta.outputs.tags }}
          # ensure latest base image is used
          pull: true
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            BASE_IMAGE=${{ matrix.baseImage }}
            BUILD_FILES_REV=${{ steps.build-files-rev.outputs.REV }}
          cache-from: type=gha,scope=${{ matrix.variant }}
          cache-to: type=gha,mode=max,scope=${{ matrix.variant }}