name: docker-images

on:
  push:
    branches:
    - master
    - docker-test
  pull_request:
    branches:
    - master
    - docker-test
  workflow_dispatch:

jobs:
  multi:
    strategy:
      fail-fast: false
      matrix:
        image:
          - ftpsync
          - nix-channels
          - pub-mirror
          - rubygems-mirror
          - rustup-mirror
          - shadowmire
          - tsumugu
          - tunasync-scripts
          # - freighter
        os:
          - ubuntu-latest
          - ubuntu-24.04-arm
        include:
          - image: tunasync-scripts
            dockerfile_dir: .
          # - image: julia-mirror
          #   dockerfile: dockerfiles/julia

    runs-on: ${{ matrix.os }}
    steps:
      -
        name: Determine dockerfile dir
        id: docker_file_dir
        env:
          DF: ${{ matrix.dockerfile_dir }}
          IMG: ${{ matrix.image }}
        run: |
          if [ -z "${DF}" ]; then
            DF="dockerfiles/${IMG}"
          fi
          echo "docker_file_dir=${DF}" >> $GITHUB_OUTPUT
      -
        name: Checkout
        uses: actions/checkout@v5
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Cache Docker layers
        uses: actions/cache@v4
        if: github.event_name == 'push'
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-${{ runner.arch }}-buildx-${{ matrix.image }}-${{ matrix.os }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-${{ runner.arch }}-buildx-${{ matrix.image }}-${{ matrix.os }}-
            ${{ runner.os }}-${{ runner.arch }}-buildx-${{ matrix.image }}-
      -
        name: Cache Docker layers
        uses: actions/cache@v4
        if: github.event_name == 'pull_request'
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-${{ runner.arch }}-pr-${{ github.event.pull_request.head.user.login }}-buildx-${{ matrix.image }}-${{ matrix.os }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-${{ runner.arch }}-pr-${{ github.event.pull_request.head.user.login }}-buildx-${{ matrix.image }}-${{ matrix.os }}-
            ${{ runner.os }}-${{ runner.arch }}-buildx-${{ matrix.image }}-${{ matrix.os }}-
            ${{ runner.os }}-${{ runner.arch }}-buildx-${{ matrix.image }}-
      -
        name: Cache Docker layers
        if: github.event_name != 'push' && github.event_name != 'pull_request'
        run: |
          echo "I do not know how to setup cache"
          exit -1
      -
        name: Login to DockerHub
        uses: docker/login-action@v3
        if: github.event_name == 'push'
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Build and push
        uses: docker/build-push-action@v6
        id: dockerbuild
        with:
          context: .
          file: ${{ steps.docker_file_dir.outputs.docker_file_dir }}/Dockerfile
          push: ${{ github.event_name == 'push' }}
          tags: tunathu/${{ matrix.image }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache
          outputs: ${{ github.event_name == 'push' && 'type=image,push-by-digest=true,name-canonical=true,push=true' || 'type=image' }}
      -
        name: Export digest
        run: |
          mkdir -p ${{ runner.temp }}/digests/${{ matrix.image }}
          digest="${{ steps.dockerbuild.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${{ matrix.image }}/${digest#sha256:}"
      -
        name: Upload digest
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ matrix.image }}-${{ matrix.os }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: ubuntu-latest
    needs:
      - multi
    if: always() && github.event_name == 'push'
    steps:
      -
        name: Determine docker tag
        id: docker_tag
        env:
          TAG_NAME: ${{ github.ref }}
        run: |
          if [ "${TAG_NAME##*/}" = "master" ]; then
            tag=latest
          else
            tag=build-test
          fi
          echo "docker_tag=${tag}" >> $GITHUB_OUTPUT
      -
        name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digests-*
          merge-multiple: true
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Create manifest list and push
        working-directory: ${{ runner.temp }}/digests
        run: |
          for i in *; do
            docker buildx imagetools create -t "tunathu/$i:${{ steps.docker_tag.outputs.docker_tag }}" \
              $(printf "tunathu/$i@sha256:%s " $(ls $i))
          done

      - name: Inspect images
        working-directory: ${{ runner.temp }}/digests
        run: |
          for i in *; do
            docker buildx imagetools inspect "tunathu/$i:${{ steps.docker_tag.outputs.docker_tag }}"
          done