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 }}

concurrency:
  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}-${{ inputs.fedora_version }}
  cancel-in-progress: true

jobs:
  build:
    name: Build
    runs-on: ubuntu-24.04
    permissions:
      contents: read
      packages: write
      id-token: write
    strategy:
      fail-fast: false
      matrix:
        arch:
          - amd64
        version:
          - 40
        flavor:
          - base
          - base-nvidia
          - silverblue
          - silverblue-nvidia
          - kinoite
          - kinoite-nvidia

    steps:
      # Checkout push-to-registry action GitHub repository
      - name: Maximize build space
        uses: ublue-os/remove-unwanted-software@v7
        with:
          remove-android: 'true'

      - name: Checkout Push to Registry action
        uses: actions/checkout@v4

      - name: Generate tags
        id: generate-tags
        shell: bash
        run: |
          # Generate a timestamp for creating an image version history
          TIMESTAMP="$(date +%Y%m%d)"
          MAJOR_VERSION="$(echo ${{ matrix.version }} | cut -d . -f 1)"
          COMMIT_TAGS=()
          BUILD_TAGS=()
          # Have tags for tracking builds during pull request
          SHA_SHORT="${GITHUB_SHA::7}"

          # Using clever bash string templating, https://stackoverflow.com/q/40771781
          # don't make malformed tags if $MAJOR_VERSION is empty (base-image didn't include proper labels) --
          COMMIT_TAGS+=("${SHA_SHORT}${MAJOR_VERSION:+-$MAJOR_VERSION}")
          BUILD_TAGS=("${MAJOR_VERSION}" "${MAJOR_VERSION}-${{ matrix.arch }}" "${MAJOR_VERSION:+$MAJOR_VERSION-}${TIMESTAMP}" "${MAJOR_VERSION:+$MAJOR_VERSION-}${TIMESTAMP}-${{ matrix.arch }}")
          # --
          if [ "${MAJOR_VERSION}" == "40" ]; then
            BUILD_TAGS+=("${TIMESTAMP}")
            BUILD_TAGS+=("latest-${{ matrix.arch }}")
          fi

          alias_tags=("${BUILD_TAGS[@]}")
          echo "Generated the following build tags: "
          for TAG in "${BUILD_TAGS[@]}"; do
              echo "${TAG}"
          done
          echo "alias_tags=${alias_tags[*]}" >> $GITHUB_OUTPUT

          IMAGE_NAME="cosmic-${{ matrix.flavor }}"
          if [[ "$IMAGE_NAME" == *-base* ]]; then
            IMAGE_NAME="${IMAGE_NAME//-base/}"
          fi
          echo "IMAGE_NAME=${IMAGE_NAME}" >> $GITHUB_ENV

      # Build 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=${{ matrix.version }}
            org.opencontainers.image.description=${{ env.description }}
            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/ublue-os/cosmic/main/README.md
            io.artifacthub.package.logo-url=https://avatars.githubusercontent.com/u/120078124?s=200&v=4


      # Create Variables. Use UBlue images for amd64, fedora-ostree desktop for arm64
      - name: matrix-variables
        run: |
          if [[ ${{ matrix.arch }} = "amd64" && ${{ matrix.version }} != "rawhide" ]]; then
            echo "SOURCE_ORG=ghcr.io/ublue-os" >> $GITHUB_ENV
            if [[ "${{ matrix.flavor }}" =~ "nvidia" ]]; then
              echo "SOURCE_IMAGE=${{ matrix.flavor }}" >> $GITHUB_ENV
            else
              echo "SOURCE_IMAGE=${{ matrix.flavor }}-main" >> $GITHUB_ENV
            fi
          else
            echo "SOURCE_ORG=quay.io/fedora-ostree-desktops" >> $GITHUB_ENV
            echo "SOURCE_IMAGE=${{ matrix.flavor }}" >> $GITHUB_ENV
          fi

      - name: Build Image
        id: build_image
        run: |
          sudo buildah build \
            --arch "${{ matrix.arch }}" \
            --format "docker" \
            --build-arg FEDORA_MAJOR_VERSION="${{ matrix.version }}" \
            --build-arg SOURCE_IMAGE="${{ env.SOURCE_IMAGE }}" \
            --build-arg SOURCE_ORG="${{ env.SOURCE_ORG }}" \
            --tag raw-img .

      # Reprocess raw-img using rechunker which will delete it
      - name: Run Rechunker
        id: rechunk
        uses: hhd-dev/rechunk@v0.8.1
        with:
          rechunk: 'ghcr.io/hhd-dev/rechunk:v0.8.1'
          ref: 'raw-img'
          prev-ref: "${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}:${{ matrix.version }}"
          skip_compression: true
          version: ${{ matrix.version }}
          labels: |
            org.opencontainers.image.title=${{ env.IMAGE_NAME }}
            org.opencontainers.image.description=${{ env.description }}
            io.artifacthub.package.readme-url=https://raw.githubusercontent.com/ublue-os/cosmic/main/README.md
            io.artifacthub.package.logo-url=https://avatars.githubusercontent.com/u/120078124?s=200&v=4

      - name: Load in podman and tag
        run: |
          IMAGE=$(podman pull ${{ steps.rechunk.outputs.ref }})
          sudo rm -rf ${{ steps.rechunk.outputs.output }}
          for tag in ${{ steps.generate-tags.outputs.alias_tags }}; do
            podman tag $IMAGE ${{ env.IMAGE_NAME }}:$tag
          done

      # 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: 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 }}

      # Push the image to GHCR (Image Registry)
      - name: Push To GHCR
        uses: redhat-actions/push-to-registry@v2
        if: github.event_name != 'pull_request'
        id: push
        with:
          registry: ${{ steps.registry_case.outputs.lowercase }}
          image: ${{ env.IMAGE_NAME }}
          tags: ${{ steps.generate-tags.outputs.alias_tags }}
          extra-args: |
            --disable-content-trust

      # Sign container
      - uses: sigstore/cosign-installer@v3.5.0
        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 ${{ steps.registry_case.outputs.lowercase }}/${{ env.IMAGE_NAME }}@${TAGS}
        env:
          TAGS: ${{ steps.push.outputs.digest }}
          COSIGN_EXPERIMENTAL: false
          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}

  check:
    name: Check all builds successful
    if: ${{ !cancelled() }}
    runs-on: ubuntu-latest
    needs: [build]
    steps:
      - name: Exit on failure
        if: ${{ needs.build.result == 'failure' }}
        shell: bash
        run: exit 1
      - name: Exit
        shell: bash
        run: exit 0