builder.yaml

name: Builder

env:
  #BUILD_ARGS: "--test"
  MONITORED_FILES: "build.yaml config.yaml Dockerfile rootfs run.sh start.sh"

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  init:
    runs-on: ubuntu-latest
    name: Initialize builds
    outputs:
      changed_addons: ${{ steps.changed_addons.outputs.addons }}
      changed: ${{ steps.changed_addons.outputs.changed }}
    steps:
      - name: Check out the repository
        uses: actions/checkout@v4.2.0

      - name: Get changed files
        id: changed_files
        uses: masesgroup/retrieve-changed-files@v2

      - name: Find add-on directories
        id: addons
        uses: home-assistant/actions/helpers/find-addons@master

      - name: Get changed add-ons
        id: changed_addons
        run: |
          declare -a changed_addons
          for addon in ${{ steps.addons.outputs.addons }}; do
            if [[ "${{ steps.changed_files.outputs.all }}" =~ $addon ]]; then
              for file in ${{ env.MONITORED_FILES }}; do
                  if [[ "${{ steps.changed_files.outputs.all }}" =~ $addon/$file ]]; then
                    if [[ ! "${changed_addons[@]}" =~ $addon ]]; then
                      changed_addons+=("\"${addon}\",");
                    fi
                  fi
              done
            fi
          done

          changed=$(echo ${changed_addons[@]} | rev | cut -c 2- | rev)

          if [[ -n ${changed} ]]; then
            echo "Changed add-ons: $changed";
            echo "changed=true" >> $GITHUB_OUTPUT;
            echo "addons=[$changed]" >> $GITHUB_OUTPUT;
          else
            echo "No add-on had any monitored files changed (${{ env.MONITORED_FILES }})";
          fi
  build:
    needs: init
    runs-on: ubuntu-latest
    if: needs.init.outputs.changed == 'true'
    name: Build ${{ matrix.arch }} ${{ matrix.addon }} add-on
    strategy:
      matrix:
        addon: ${{ fromJson(needs.init.outputs.changed_addons) }}
        #arch: ["aarch64", "amd64", "armhf", "armv7", "i386"]
        arch: ["aarch64", "amd64"]
      fail-fast: false
    steps:
      - name: Check out repository
        uses: actions/checkout@v4.2.0

      - name: Get information
        id: info
        uses: home-assistant/actions/helpers/info@master
        with:
          path: "./${{ matrix.addon }}"

      - name: Check if add-on should be built
        id: check
        run: |
          if [[ "${{ steps.info.outputs.architectures }}" =~ ${{ matrix.arch }} ]]; then
             echo "build_arch=true" >> $GITHUB_OUTPUT;
             echo "image=$(echo ${{ steps.info.outputs.image }} | cut -d'/' -f3)" >> $GITHUB_OUTPUT;
             if [[ -z "${{ github.head_ref }}" ]] && [[ "${{ github.event_name }}" == "push" ]]; then
                 echo "BUILD_ARGS=" >> $GITHUB_ENV;
             fi
           else
             echo "${{ matrix.arch }} is not a valid arch for ${{ matrix.addon }}, skipping build";
             echo "build_arch=false" >> $GITHUB_OUTPUT;
          fi

#      - name: Login to GitHub Container Registry
#        if: env.BUILD_ARGS != '--test'
#        uses: docker/login-action@v3.3.0
#        with:
#          registry: ghcr.io
#          username: ${{ github.repository_owner }}
#          password: ${{ secrets.GITHUB_TOKEN }}


      - name: Authenticate GitHub Container Registry
        if: env.BUILD_ARGS != '--test'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.HA_GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.7.1


      - name: Set BUILD_FROM, PLATFORM, and VERSION variables
        if: steps.check.outputs.build_arch == 'true'
        run: |
          BUILD_FROM=$(yq e ".build_from.${{ matrix.arch }}" ./${{ matrix.addon }}/build.yaml)
          PLATFORM=$(yq e ".platform.${{ matrix.arch }}" ./${{ matrix.addon }}/build.yaml)
          VERSION=$(yq e ".version" ./${{ matrix.addon }}/config.yaml)
          echo "BUILD_FROM=${BUILD_FROM}" >> $GITHUB_ENV
          echo "PLATFORM=${PLATFORM}" >> $GITHUB_ENV
          echo "VERSION=${VERSION}" >> $GITHUB_ENV
          echo "REPO_NAME_LC=$(echo ${GITHUB_REPOSITORY} | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
          echo "platform may be different than arch. ex armv7 vs arm/v7"
      

      - name: Build and push Docker images
        if: steps.check.outputs.build_arch == 'true'
        run: |
          docker buildx build --platform linux/${{ env.PLATFORM }} \
            --build-arg BUILD_FROM=${{ env.BUILD_FROM }} \
            --build-arg REPO_URL=https://github.com/${{ env.REPO_NAME_LC }} \
            --build-arg VERSION=${{ env.VERSION }} \
            --build-arg PLATFORM=${{ env.PLATFORM }} \
            --push \
            -t ghcr.io/${{ env.REPO_NAME_LC }}-${{ matrix.addon }}-${{ matrix.arch }}:${{ env.VERSION }} \
            ./${{ matrix.addon }}