alpine.yml

name: build image

on:
  push:
    branches:
      - master
      - main
  workflow_dispatch:
    inputs:
      buildtype:
        description: 'building by "force" or on "change"'
        required: true
        default: 'force'
  repository_dispatch:
    types: alpine

jobs:

  compare:
    runs-on: ubuntu-latest
    outputs:
      images: ${{ steps.images.outputs.images }}
    strategy:
      fail-fast: false
      matrix:
        arch: [amd64, arm, arm64]
        version: [3.12, 3.14, 3.16, 3.18]
    env:
      name: "treehouses/alpine"
    steps:
      - name: checkout repository
        uses: actions/checkout@v4
      - name: compare image
        id: images
        run: |
          export DOCKER_CLI_EXPERIMENTAL=enabled
          tags="$name-tags"
          repo="$tags:${{ matrix.arch }}-${{ matrix.version }}"
          case ${{ matrix.arch }} in
            amd64) : "amd64/alpine:${{ matrix.version }}" ;;
            arm) : "balenalib/raspberry-pi-alpine:${{ matrix.version }}" ;;
            arm64) : "arm64v8/alpine:${{ matrix.version }}" ;;
          esac
          base="$_"
          docker pull -q $base &>/dev/null
          docker pull -q $repo &>/dev/null
          basesha=$(docker image inspect $base | jq --raw-output '.[0].RootFS.Layers|.[]')
          reposha=$(docker image inspect $repo | jq --raw-output '.[0].RootFS.Layers|.[]')
          echo "base sha:$basesha repo sha:$reposha"
          ${{ github.event.inputs.buildtype  == 'force' }} && echo "images=true" >> $GITHUB_OUTPUT || echo "no force" 
          [[ $reposha == *$basesha* ]] && echo "no changes" || echo "images=true" >> $GITHUB_OUTPUT

  images:
    needs: compare
    if: ${{ needs.compare.outputs.images }}
    runs-on: ubuntu-latest
    outputs:
      manifests: ${{ steps.manifests.outputs.manifests }}
    strategy:
      fail-fast: false
      matrix:
        arch: [amd64, arm, arm64]
        version: [3.12, 3.14, 3.16, 3.18]
    env:
      name: "treehouses/alpine"
    steps:
      - name: checkout repository
        uses: actions/checkout@v4
      - name: container registries
        run: |
          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
      - name: docker image
        id: manifests
        run: |
          export DOCKER_CLI_EXPERIMENTAL=enabled
          tags="$name-tags"
          repo="$tags:${{ matrix.arch }}"
          more="$repo-${{ matrix.version }}"
          case ${{ matrix.arch }} in
            amd64) : "amd64/alpine:${{ matrix.version }}" ;;
            arm) : "balenalib/raspberry-pi-alpine:${{ matrix.version }}" ;;
            arm64) : "arm64v8/alpine:${{ matrix.version }}" ;;
          esac
          base="$_"
          time=$(date +%Y%m%d%H%M)
          date="$repo-$time"
          full="$more-$time"
          docker build -t image --build-arg BASE=$base .
          #for compatilbity reasons
          if [[ "${{ matrix.version }}" == "3.12" ]]; then
            docker tag image ghcr.io/$repo
            docker tag image docker.io/$repo
            docker tag image ghcr.io/$date
            docker tag image docker.io/$date
          fi
          docker tag image ghcr.io/$more
          docker tag image docker.io/$more
          docker tag image ghcr.io/$full
          docker tag image docker.io/$full
          docker push --all-tags ghcr.io/$tags
          docker push --all-tags docker.io/$tags
          docker images
          echo "manifests=true" >> $GITHUB_OUTPUT

  manifests:
    needs: images
    if: ${{ needs.images.outputs.manifests }}
    strategy:
      fail-fast: false
      matrix:
        registry: [docker.io, ghcr.io]
        version: [3.12, 3.14, 3.16, 3.18]
    runs-on: ubuntu-latest
    outputs:
      message: ${{ steps.message.outputs.message }}
    env:
      name: "${{ matrix.registry }}/treehouses/alpine"
    steps:
      - name: container registries
        run: |
          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
      - name: create manifests
        id: message
        run: |
          export DOCKER_CLI_EXPERIMENTAL=enabled
          tags="$name-tags"
          date="$(date +%Y%m%d%H%M)"
          #for compatilbity reasons
          if [[ "${{ matrix.version }}" == "3.12" ]]; then
            docker manifest create $name:latest $tags:amd64 $tags:arm $tags:arm64
            docker manifest annotate $name:latest $tags:arm --os linux --arch arm
            docker manifest inspect $name:latest
            docker manifest push $name:latest
            docker manifest create $name:$date $tags:amd64 $tags:arm $tags:arm64
            docker manifest annotate $name:$date $tags:arm --os linux --arch arm
            docker manifest inspect $name:$date
            docker manifest push $name:$date
          fi
          docker manifest create $name:${{ matrix.version }} $tags:amd64-${{ matrix.version }} $tags:arm-${{ matrix.version }} $tags:arm64-${{ matrix.version }}
          docker manifest annotate $name:${{ matrix.version }} $tags:arm-${{ matrix.version }} --os linux --arch arm
          docker manifest inspect $name:${{ matrix.version }}
          docker manifest push $name:${{ matrix.version }}
          docker manifest create $name:${{ matrix.version }}-$date $tags:amd64-${{ matrix.version }} $tags:arm-${{ matrix.version }} $tags:arm64-${{ matrix.version }}
          docker manifest annotate $name:${{ matrix.version }}-$date $tags:arm-${{ matrix.version }} --os linux --arch arm
          docker manifest inspect $name:${{ matrix.version }}-$date
          docker manifest push $name:${{ matrix.version }}-$date
          echo "message=true" >> $GITHUB_OUTPUT

  message:
    needs: manifests
    if: ${{ needs.manifests.outputs.message }}
    runs-on: ubuntu-latest
    steps:
      - name: message chat of new image
        run: |
          sudo npm install -g @treehouses/cli
          export discord_channel="${{ secrets.CHANNEL }}"
          echo "https://hub.docker.com/r/treehouses/alpine/tags"
          echo "https://github.com/treehouses/alpine/pkgs/container/alpine"
          treehouses feedback "new treehouses/alpine check https://hub.docker.com/r/treehouses/alpine/tags or https://github.com/treehouses/alpine/pkgs/container/alpine"