build.yaml

# Home Assistant Operating System build workflow

name: OS build

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      boards:
        description: 'List of boards to build (comma separated identifiers)'
        required: false
        type: string
        default: "panther-x2"
      publish:
        description: 'Publish build artifacts to R2 (not applicable to forks)'
        required: false
        type: boolean
        default: false

env:
  PYTHON_VERSION: "3.10"

jobs:
  prepare:
    name: Prepare build
    runs-on: ubuntu-22.04
    permissions:
      contents: read
      pull-requests: read
      packages: write
    outputs:
      version_dev: ${{ steps.version_dev.outputs.version_dev }}
      version_main: ${{ steps.version.outputs.version_main }}
      version_full: ${{ steps.version.outputs.version_full }}
      channel: ${{ steps.channel.outputs.channel }}
      matrix: ${{ steps.generate_matrix.outputs.result }}
      build_container_image: ghcr.io/${{ github.repository_owner }}/haos-builder@${{ steps.build_haos_builder.outputs.digest }}
      publish_build: ${{ steps.check_publish.outputs.publish_build }}
      self_signed_cert: ${{ steps.generate_signing_key.outputs.self_signed_cert }}
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
        with:
          persist-credentials: false

      - name: Check if build should be published
        id: check_publish
        env:
          PUBLISH_FLAG: ${{ inputs.publish }}
        run: |
          if [ "${{ github.repository }}" == "home-assistant/operating-system" ]; then
            if [ "${PUBLISH_FLAG}" != "true" ] && [ "${{ github.event_name }}" != "release" ]; then
              echo "publish_build=false" >> "$GITHUB_OUTPUT"
            else
              echo "publish_build=true" >> "$GITHUB_OUTPUT"
            fi
          else
            echo "publish_build=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Generate development version
        shell: bash
        id: version_dev
        if: ${{ github.event_name != 'release' }}
        env:
          PUBLISH_BUILD: ${{ steps.check_publish.outputs.publish_build }}
        run: |
          version_dev="dev$(date --utc +'%Y%m%d')"
          if [ "${{ env.PUBLISH_BUILD }}" != "true" ]; then
            version_dev="dev$(date +%s)"
          fi
          echo "Development version \"${version_dev}\""
          echo "version_dev=${version_dev}" >> $GITHUB_OUTPUT

      - name: Set version suffix
        if: ${{ github.event_name != 'release' }}
        env:
          VERSION_DEV: ${{ steps.version_dev.outputs.version_dev }}
        run: |
          sed -i -E "s/(^VERSION_SUFFIX=\").*(\"$)/\1${VERSION_DEV}\2/" buildroot-external/meta

      - name: Get version
        id: version
        run: |
          . ${GITHUB_WORKSPACE}/buildroot-external/meta
          echo "version_main=${VERSION_MAJOR}.${VERSION_MINOR}" >> $GITHUB_OUTPUT
          if [ -z "${VERSION_SUFFIX}" ]; then
            version_full="${VERSION_MAJOR}.${VERSION_MINOR}"
          else
            version_full="${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_SUFFIX}"
          fi
          echo "version_full=${version_full}" >> $GITHUB_OUTPUT
          echo "Full version number of this release is \"${version_full}\"."

      - name: Validate version
        id: version_check
        if: ${{ github.event_name == 'release' }}
        run: |
          if [ "${{ steps.version.outputs.version_full }}" != "${{ github.event.release.tag_name }}" ]; then
            echo "Version number in Buildroot metadata does not match tag (${{ steps.version.outputs.version_full }} vs ${{ github.event.release.tag_name }})."
            exit 1
          fi

      - name: Get channel
        id: channel
        run: |
          if [[ "${{ github.event_name }}" == "release" ]]; then
            if [[ "${{ github.event.release.prerelease }}" == "true" ]]; then
              echo "channel=beta" >> "$GITHUB_OUTPUT"
            else
              echo "channel=stable" >> "$GITHUB_OUTPUT"
            fi
          else
            echo "channel=dev" >> "$GITHUB_OUTPUT"
          fi

      - name: Create build matrix
        uses: actions/github-script@v7
        id: generate_matrix
        with:
          script: |
            const boards = require('./.github/workflows/matrix.json')
            if ("${{ github.event_name }}" == "release") {
              return { "board": boards }
            }

            const boardFilter = "${{ github.event.inputs.boards }}"
            if (boardFilter == "") {
              console.log("Run full build for all boards")
              return { "board": boards }
            } else {
              console.log("Run partial build")
              const boardSet = new Set(boardFilter.split(","))
              const buildBoards = boards.filter(b => boardSet.has(b.id))
              return { "board": buildBoards }
            }

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.2.0
      - name: Log in to the GitHub container registry
        uses: docker/login-action@v3.1.0
        with:
            registry: ghcr.io
            username: ${{ github.repository_owner }}
            password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and Push
        uses: docker/build-push-action@v5.3.0
        id: build_haos_builder
        with:
          context: .
          file: Dockerfile
          tags: ghcr.io/${{ github.repository_owner }}/haos-builder
          cache-from: ghcr.io/${{ github.repository_owner }}/haos-builder:cache-${{ steps.version.outputs.version_main }}
          cache-to: ghcr.io/${{ github.repository_owner }}/haos-builder:cache-${{ steps.version.outputs.version_main }}
          push: true

      - name: Generate self-signed certificate
        id: generate_signing_key
        env:
          RAUC_CERTIFICATE: ${{ secrets.RAUC_CERTIFICATE }}
          RAUC_PRIVATE_KEY: ${{ secrets.RAUC_PRIVATE_KEY }}
        if: env.RAUC_CERTIFICATE == '' || env.RAUC_PRIVATE_KEY == ''
        run: |
          echo "::warning:: RAUC certificate or key is missing in the repository secrets. Building with a public self-signed certificate!"
          buildroot-external/scripts/generate-signing-key.sh cert.pem key.pem
          echo "self_signed_cert=true" >> $GITHUB_OUTPUT

      - name: Create signing key
        uses: actions/upload-artifact@v4
        if: steps.generate_signing_key.outcome == 'success'
        with:
          name: signing-key
          path: |
            cert.pem
            key.pem

  build:
    name: Build for ${{ matrix.board.id }}
    permissions:
      contents: write  # for actions/upload-release-asset to upload release asset
    needs: prepare
    strategy:
      fail-fast: ${{ github.event_name == 'release' }}
      matrix: ${{ fromJson(needs.prepare.outputs.matrix) }}
    runs-on: ubuntu-22.04

    steps:
      - name: Checkout source
        uses: actions/checkout@v4
        with:
          submodules: true
          persist-credentials: false

      - name: Setup Python version ${{ env.PYTHON_VERSION }}
        if: ${{ github.event_name != 'release' }}
        uses: actions/setup-python@v5
        with:
          python-version: ${{ env.PYTHON_VERSION }}

      - name: Install AWS CLI
        if: ${{ github.event_name != 'release' && needs.prepare.outputs.publish_build == 'true' }}
        run: pip install awscli

      - name: Set version suffix
        if: ${{ github.event_name != 'release' }}
        env:
          VERSION_DEV: ${{ needs.prepare.outputs.version_dev }}
        run: |
          sed -i -E "s/(^VERSION_SUFFIX=\").*(\"$)/\1${VERSION_DEV}\2/" buildroot-external/meta

      - name: 'Add release PKI certs'
        if: ${{ needs.prepare.outputs.self_signed_cert != 'true' }}
        env:
          RAUC_CERTIFICATE: ${{ secrets.RAUC_CERTIFICATE }}
          RAUC_PRIVATE_KEY: ${{ secrets.RAUC_PRIVATE_KEY }}
        run: |
          echo "${RAUC_CERTIFICATE}" > cert.pem
          echo "${RAUC_PRIVATE_KEY}" > key.pem

      - name: Get self-signed certificate from the prepare job
        if: ${{ needs.prepare.outputs.self_signed_cert == 'true' }}
        uses: actions/download-artifact@v4
        with:
          name: signing-key

      - name: Free space on build drive
        run: |
          # Inspired by https://github.com/easimon/maximize-build-space/blob/v7/action.yml
          df -h
          sudo rm -rf /usr/local/lib/android/sdk/ndk
          sudo rm -rf /opt/hostedtoolcache/CodeQL
          sudo mkdir /mnt/cache
          sudo mkdir /mnt/output
          WORKSPACE_OWNER="$(stat -c '%U:%G' "${GITHUB_WORKSPACE}")"
          # output directory is symlinked for easier access from workspace
          # but for build container it must be mounted as a volume
          sudo ln -sf /mnt/output "${GITHUB_WORKSPACE}/output"
          sudo chown -R "${WORKSPACE_OWNER}" /mnt/cache
          sudo chown -R "${WORKSPACE_OWNER}" /mnt/output
          df -h

      - name: "Restore cache: object files"
        uses: actions/cache/restore@v4
        with:
          path: /mnt/cache/cc
          key: haos-cc-${{ matrix.board.id }}

      - name: Build
        run: |
          BUILDER_UID="$(id -u)"
          BUILDER_GID="$(id -g)"
          ls -la ${GITHUB_WORKSPACE}
          docker run --rm --privileged \
            -e BUILDER_UID="${BUILDER_UID}" -e BUILDER_GID="${BUILDER_GID}" \
            -v "${GITHUB_WORKSPACE}:/build" \
            -v "/mnt/cache:/cache" \
            -v "/mnt/output:/build/output" \
            ${{ needs.prepare.outputs.build_container_image }} \
            make BUILDDIR=/build ${{ matrix.board.defconfig }}

      - name: Check Linux config
        run: |
          docker run --rm --privileged \
            -e BUILDER_UID="$(id -u)" -e BUILDER_GID="$(id -g)" \
            -v "${GITHUB_WORKSPACE}:/build" \
            -v "/mnt/cache:/cache" \
            -v "/mnt/output:/build/output" \
            ${{ needs.prepare.outputs.build_container_image }} \
            make -C buildroot O="/build/output" BR2_EXTERNAL="/build/buildroot-external" \
            BR2_CHECK_DOTCONFIG_OPTS="--github-format --strip-path-prefix=/build/" linux-check-dotconfig

      - name: Upload release assets
        if: ${{ github.event_name == 'release' }}
        uses: shogo82148/actions-upload-release-asset@v1
        with:
          upload_url: ${{ github.event.release.upload_url }}
          asset_path: output/images/haos_*

      - name: Print cache stats
        run: |
          echo "Cache size: $(du -sh /mnt/cache/cc)"
          echo "Files total: $(find /mnt/cache/cc -mindepth 1 -type f | wc -l)"
          echo "Old files to remove: $(find /mnt/cache/cc -mindepth 1 -type f -not -anewer output/Makefile | wc -l)"
          find /mnt/cache/cc -mindepth 1 -type f -not -anewer output/Makefile -delete
          echo "Cache size after pruning: $(du -sh /mnt/cache/cc)"

      - name: "Save cache: object files"
        uses: actions/cache/save@v4
        with:
          path: /mnt/cache/cc
          key: haos-cc-${{ matrix.board.id }}-${{ github.run_id }}

      - name: Generate build summary
        run: |
          echo "# ${{ matrix.board.id }} build summary" >> $GITHUB_STEP_SUMMARY
          echo "## Artifacts" >> $GITHUB_STEP_SUMMARY
          echo "| File | Size (bytes) | Size (formatted) |" >> $GITHUB_STEP_SUMMARY
          echo "|:-|:-|:-|" >> $GITHUB_STEP_SUMMARY
          for f in output/images/haos_*; do
            echo "| $(basename $f) | $(du -b $f | cut -f1) | $(du -bh $f | cut -f1) |" >> $GITHUB_STEP_SUMMARY
          done
          echo "## Partitions" >> $GITHUB_STEP_SUMMARY
          echo "| File | Size (bytes) | Size (formatted) |" >> $GITHUB_STEP_SUMMARY
          echo "|:-|:-|:-|" >> $GITHUB_STEP_SUMMARY
          for f in boot.vfat kernel.img rootfs.squashfs overlay.ext4 data.ext4; do
            echo "| ${f} | $(du -b output/images/$f | cut -f1) | $(du -bh output/images/$f | cut -f1) |" >> $GITHUB_STEP_SUMMARY
          done

      - name: Upload OS image artifact
        uses: actions/upload-artifact@v4
        if: ${{ github.event_name != 'release' && needs.prepare.outputs.publish_build != 'true' && matrix.board.id != 'ova' }}
        with:
          name: haos_${{ matrix.board.id }}-${{ needs.prepare.outputs.version_full }}.img.xz
          path: |
            output/images/haos_${{ matrix.board.id }}-${{ needs.prepare.outputs.version_full }}.img.xz

      - name: Upload RAUC bundle artifact
        uses: actions/upload-artifact@v4
        if: ${{ github.event_name != 'release' && needs.prepare.outputs.publish_build != 'true' }}
        with:
          name: haos_${{ matrix.board.id }}-${{ needs.prepare.outputs.version_full }}.raucb
          path: |
            output/images/haos_${{ matrix.board.id }}-${{ needs.prepare.outputs.version_full }}.raucb

  update_index:
    name: Update artifacts index
    if: ${{ github.event_name != 'release' && needs.prepare.outputs.publish_build == 'true' }}
    needs: [ build, prepare ]
    uses: home-assistant/operating-system/.github/workflows/artifacts-index.yaml@dev
    with:
      version: ${{ needs.prepare.outputs.version_full }}
    secrets:
      R2_OS_ARTIFACTS_ID: ${{ secrets.R2_OS_ARTIFACTS_ID }}
      R2_OS_ARTIFACTS_KEY: ${{ secrets.R2_OS_ARTIFACTS_KEY }}
      R2_OS_ARTIFACTS_BUCKET: ${{ secrets.R2_OS_ARTIFACTS_BUCKET }}
      R2_OS_ARTIFACTS_ENDPOINT: ${{ secrets.R2_OS_ARTIFACTS_ENDPOINT }}
      CF_ZONE: ${{ secrets.CF_ZONE }}
      CF_PURGE_TOKEN: ${{ secrets.CF_PURGE_TOKEN }}