build.yml

name: build-ublue
on:
  pull_request:
  merge_group:
  schedule:
    - cron: '0 15 * * *'  # 3pm UTC everyday (timed against official fedora container pushes)
  workflow_dispatch:
env:
  IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}

jobs:
  push-ghcr:
    name: main image
    runs-on: ubuntu-22.04
    permissions:
      contents: read
      packages: write
      id-token: write
    strategy:
      fail-fast: false
      matrix:
        image_name:
          - silverblue
          - kinoite
          - sericea
          - onyx
          - base
          - lxqt
          - mate
          - vauxite
        major_version: [37, 38, 39]
        build_target: [nokmods, kmods]
        include:
          - major_version: 37
            is_latest_version: false
            is_stable_version: true
            is_gts_version: false
          - major_version: 38
            is_latest_version: true
            is_stable_version: true
            is_gts_version: true
          - major_version: 39
            is_latest_version: true
            is_stable_version: false
            is_gts_version: false
        exclude:
          # There is no Fedora 37 version of sericea
          - image_name: sericea
            major_version: 37
          # There is no Fedora 37 or 38 version of onyx
          - image_name: onyx
            major_version: 37
          - image_name: onyx
            major_version: 38
          # THE FOLLOWING EXCLUDE IS MESSY BUT TEMPORARY UNTIL F38 IS GONE
          # see: https://github.com/ublue-os/main/issues/369
          # Fedora 39+ images do not include custom kmods (legacy)
          - build_target: kmods
            major_version: 39
    steps:
      - name: Maximize build space
        uses: ublue-os/remove-unwanted-software@v6

      # Checkout push-to-registry action GitHub repository
      - name: Checkout Push to Registry action
        uses: actions/checkout@v4

      - name: Matrix Variables
        shell: bash
        run: |
          if [[ "${{ matrix.major_version }}" -ge "39" ]] && \
            grep "${{ matrix.image_name }}" <<< "silverblue, kinoite, sericea"; then
              echo "SOURCE_ORG=fedora" >> $GITHUB_ENV
              echo "SOURCE_IMAGE=fedora-${{ matrix.image_name }}" >> $GITHUB_ENV
          else
              if [[ "${{ matrix.image_name }}" == "lxqt" || "${{ matrix.image_name }}" == "mate" ]]; then
                  echo "SOURCE_IMAGE=base" >> $GITHUB_ENV
              else
                  echo "SOURCE_IMAGE=${{ matrix.image_name }}" >> $GITHUB_ENV
              fi
              echo "SOURCE_ORG=fedora-ostree-desktops" >> $GITHUB_ENV
          fi

          # THE FOLLOWING IS MESSY BUT TEMPORARY UNTIL F38 IS GONE
          # see: https://github.com/ublue-os/main/issues/369
          # Fedora 39+ images do not include custom kmods (legacy)
          if [[ "${{ matrix.major_version}}" -ge "39" && "${{ matrix.build_target }}" == "nokmods" ]]; then
              export IMAGE_FLAVOR=main
          elif [[ "${{ matrix.major_version}}" -lt "39" && "${{ matrix.build_target }}" == "nokmods" ]]; then
              export IMAGE_FLAVOR=nokmods
          elif [[ "${{ matrix.major_version}}" -lt "39" && "${{ matrix.build_target }}" == "kmods" ]]; then
              export IMAGE_FLAVOR=main
          else
              echo "ERROR: invalid workflow request - ${{ matrix.major_version }} - ${{ matrix.build_target }}"
              exit 1
          fi
          echo "IMAGE_NAME=${{ matrix.image_name }}-${IMAGE_FLAVOR}" >> $GITHUB_ENV

      - name: Generate tags
        id: generate-tags
        shell: bash
        run: |
          # Generate a timestamp for creating an image version history
          TIMESTAMP="$(date +%Y%m%d)"
          VARIANT="${{ matrix.major_version }}"

          COMMIT_TAGS=()
          BUILD_TAGS=()

          # Have tags for tracking builds during pull request
          SHA_SHORT="${GITHUB_SHA::7}"
          COMMIT_TAGS+=("pr-${{ github.event.number }}-${VARIANT}")
          COMMIT_TAGS+=("${SHA_SHORT}-${VARIANT}")

          if [[ "${{ matrix.is_latest_version }}" == "true" ]] && \
             [[ "${{ matrix.is_stable_version }}" == "true" ]]; then
              COMMIT_TAGS+=("pr-${{ github.event.number }}")
              COMMIT_TAGS+=("${SHA_SHORT}")
          fi

          BUILD_TAGS=("${VARIANT}")

          # Append matching timestamp tags to keep a version history
          for TAG in "${BUILD_TAGS[@]}"; do
              BUILD_TAGS+=("${TAG}-${TIMESTAMP}")
          done

          if [[ "${{ matrix.is_latest_version }}" == "true" ]] && \
             [[ "${{ matrix.is_stable_version }}" == "true" ]]; then
              BUILD_TAGS+=("${TIMESTAMP}")
              BUILD_TAGS+=("latest")
          elif [[ "${{ matrix.is_gts_version }}" == "true" ]]; then
              BUILD_TAGS+=("gts-${TIMESTAMP}")
              BUILD_TAGS+=("gts")
          fi

          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
              echo "Generated the following commit tags: "
              for TAG in "${COMMIT_TAGS[@]}"; do
                  echo "${TAG}"
              done
              alias_tags=("${COMMIT_TAGS[@]}")
          else
              alias_tags=("${BUILD_TAGS[@]}")
          fi

          echo "Generated the following build tags: "
          for TAG in "${BUILD_TAGS[@]}"; do
              echo "${TAG}"
          done

          echo "alias_tags=${alias_tags[*]}" >> $GITHUB_OUTPUT

      - name: Get current version
        id: labels
        run: |
          ver=$(skopeo inspect docker://quay.io/${{ env.SOURCE_ORG }}/${{ env.SOURCE_IMAGE }}:${{ matrix.major_version }} | jq -r '.Labels["org.opencontainers.image.version"]')
          echo "VERSION=$ver" >> $GITHUB_OUTPUT

      # Generate image metadata
      - name: Image Metadata
        uses: docker/metadata-action@v5
        id: meta
        with:
          images: |
            ${{ env.IMAGE_NAME }}
          labels: |
            org.opencontainers.image.title=${{ env.IMAGE_NAME }}
            org.opencontainers.image.version=${{ steps.labels.outputs.VERSION }}
            org.opencontainers.image.description=A base Universal Blue ${{ matrix.image_name }} image with batteries included
            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/${{ github.repository }}/main/README.md
            io.artifacthub.package.logo-url=https://avatars.githubusercontent.com/u/120078124?s=200&v=4

      # Build image using Buildah action
      - name: Build Image
        id: build_image
        uses: redhat-actions/buildah-build@v2
        with:
          containerfiles: |
            ./Containerfile
          image: ${{ env.IMAGE_NAME }}
          tags: |
            ${{ steps.generate-tags.outputs.alias_tags }}
          build-args: |
            IMAGE_NAME=${{ matrix.image_name }}
            SOURCE_ORG=${{ env.SOURCE_ORG }}
            SOURCE_IMAGE=${{ env.SOURCE_IMAGE }}
            FEDORA_MAJOR_VERSION=${{ matrix.major_version }}
          labels: ${{ steps.meta.outputs.labels }}
          oci: false
          extra-args: |
            --target=${{ matrix.build_target }}

      # Workaround bug where capital letters in your GitHub username make it impossible to push to GHCR.
      # https://github.com/macbre/push-to-ghcr/issues/12
      - name: Lowercase Registry
        id: registry_case
        uses: ASzc/change-string-case-action@v6
        with:
          string: ${{ env.IMAGE_REGISTRY }}

      - name: Push To GHCR
        uses: redhat-actions/push-to-registry@v2
        id: push
        if: github.event_name != 'pull_request'
        env:
          REGISTRY_USER: ${{ github.actor }}
          REGISTRY_PASSWORD: ${{ github.token }}
        with:
          image: ${{ steps.build_image.outputs.image }}
          tags: ${{ steps.build_image.outputs.tags }}
          registry: ${{ steps.registry_case.outputs.lowercase }}
          username: ${{ env.REGISTRY_USER }}
          password: ${{ env.REGISTRY_PASSWORD }}
          extra-args: |
            --disable-content-trust

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        if: github.event_name != 'pull_request'
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Sign container
      - uses: sigstore/cosign-installer@v3.1.2
        if: github.event_name != 'pull_request'

      - name: Sign container image
        if: github.event_name != 'pull_request'
        run: |
          cosign sign -y --key env://COSIGN_PRIVATE_KEY ${{ steps.registry_case.outputs.lowercase }}/${{ steps.build_image.outputs.image }}@${TAGS}
        env:
          TAGS: ${{ steps.push.outputs.digest }}
          COSIGN_EXPERIMENTAL: false
          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}

      - name: Echo outputs
        if: github.event_name != 'pull_request'
        run: |
          echo "${{ toJSON(steps.push.outputs) }}"

  check:
    name: Check all builds successful
    runs-on: ubuntu-latest
    needs: [push-ghcr]
    steps:
      - name: Exit
        shell: bash
        run: exit 0