name: Build Image

on: [push, pull_request, workflow_dispatch]

env:
  ENDPOINT: "linuxserver/mods"
  BASEIMAGE: "universal"
  MODNAME: "docker-in-docker"

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.3.3

      - name: Build image
        run: |
          # Set version
          if [ -z ${COMPOSE_TAG+x} ]; then COMPOSE_TAG=$(curl -sX GET "https://api.github.com/repos/linuxserver/docker-docker-compose/releases/latest" | awk '/tag_name/{print $4;exit}' FS='[""]'); fi
          if [ -z ${COMPOSE_ALPINE_TAG+x} ]; then COMPOSE_ALPINE_TAG=$(curl -sX GET "https://api.github.com/repos/linuxserver/docker-docker-compose/releases" | jq -r 'first(.[] | select(.prerelease==true)) | .tag_name'); fi
          COMPOSE_VERSION=$(echo "$COMPOSE_TAG" | sed 's|-ls.*||g')
          echo "COMPOSE_VERSION=${COMPOSE_VERSION}" >> $GITHUB_ENV
          COMPOSE_ALPINE_VERSION="$(echo ${COMPOSE_ALPINE_TAG} | sed 's|-ls.*||g' | sed 's|alpine-||g')"
          if [ "$COMPOSE_VERSION" != "$COMPOSE_ALPINE_VERSION" ]; then echo "ubuntu and alpine versions are different; exiting!" && exit 1; else echo "ubuntu and alpine versions are the same, continuing with build"; fi
          if [ -z ${DOCKER_RELEASE+x} ]; then DOCKER_RELEASE=$(curl -sX GET "https://api.github.com/repos/moby/moby/releases/latest" | awk '/tag_name/{print $4;exit}' FS='[""]' | sed 's|^v||'); fi
          if curl -fSsL "https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_RELEASE}.tgz" >/dev/null && curl -fSsL "https://download.docker.com/linux/static/stable/armhf/docker-${DOCKER_RELEASE}.tgz" >/dev/null && curl -fSsL "https://download.docker.com/linux/static/stable/aarch64/docker-${DOCKER_RELEASE}.tgz" >/dev/null; then echo "Docker tarballs exist, proceeding"; else echo "Docker tarballs are missing, exiting!" && exit 1; fi
          echo "COMBINED_TAG=${DOCKER_RELEASE}-${COMPOSE_VERSION}" >> $GITHUB_ENV
          # Build image
          docker build --no-cache --build-arg COMPOSE_TAG=${COMPOSE_TAG} --build-arg COMPOSE_ALPINE_TAG=${COMPOSE_ALPINE_TAG} --build-arg DOCKER_RELEASE=${DOCKER_RELEASE} -t ${{ github.sha }} .
      - name: Tag image
        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) }}
        run: |
          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}
          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}
          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}-${{ github.sha }}
          docker tag ${{ github.sha }} ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}-${{ github.sha }}
          docker tag ${{ github.sha }} ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
      - name: Credential check
        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) }}
        run: |
          echo "CR_USER=${{ secrets.CR_USER }}" >> $GITHUB_ENV
          echo "CR_PAT=${{ secrets.CR_PAT }}" >> $GITHUB_ENV
          echo "DOCKERUSER=${{ secrets.DOCKERUSER }}" >> $GITHUB_ENV
          echo "DOCKERPASS=${{ secrets.DOCKERPASS }}" >> $GITHUB_ENV
          if [[ "${{ secrets.CR_USER }}" == "" && "${{ secrets.CR_PAT }}" == "" && "${{ secrets.DOCKERUSER }}" == "" && "${{ secrets.DOCKERPASS }}" == "" ]]; then
            echo "::error::Push credential secrets missing."
            echo "::error::You must set either CR_USER & CR_PAT or DOCKERUSER & DOCKERPASS as secrets in your repo settings."
            echo "::error::See https://github.com/linuxserver/docker-mods/blob/master/README.md for more information/instructions."
            exit 1
          fi
      - name: Login to GitHub Container Registry
        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.CR_USER && env.CR_PAT }}
        run: |
          echo "${{ secrets.CR_PAT }}" | docker login ghcr.io -u ${{ secrets.CR_USER }} --password-stdin
      - name: Push tags to GitHub Container Registry
        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.CR_USER && env.CR_PAT }}
        run: |
          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}
          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}-${{ github.sha }}
          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          docker push ghcr.io/${ENDPOINT}:${BASEIMAGE}-${MODNAME}
      - name: Login to DockerHub
        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.DOCKERUSER && env.DOCKERPASS }}
        run: |
          echo ${{ secrets.DOCKERPASS }} | docker login -u ${{ secrets.DOCKERUSER }} --password-stdin
      - name: Push tags to DockerHub
        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) && env.DOCKERUSER && env.DOCKERPASS }}
        run: |
          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}
          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ env.COMBINED_TAG }}-${{ github.sha }}
          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
          docker push ${ENDPOINT}:${BASEIMAGE}-${MODNAME}