name: Build Bazzite BC-250
on:
  schedule:
    - cron: "40 8 * * *"
  push:
    paths-ignore:
      - "**.md"
  workflow_dispatch:
    inputs:
      force_build:
        description: "Build packages even if Bazzite channel digests did not change"
        required: false
        type: boolean
        default: false

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

jobs:
  base-digests:
    name: Check Bazzite channel digests
    runs-on: ubuntu-latest
    outputs:
      cache-hit: ${{ steps.base-digest-cache.outputs.cache-hit }}
      cache-key: ${{ steps.base-digests.outputs.cache-key }}
      digests-tsv: ${{ steps.base-digests.outputs.digests-tsv }}
      normal-matrix: ${{ steps.build-plan.outputs.normal-matrix }}
      normal-count: ${{ steps.build-plan.outputs.normal-count }}
      fortycu-matrix: ${{ steps.build-plan.outputs.fortycu-matrix }}
      fortycu-count: ${{ steps.build-plan.outputs.fortycu-count }}
      should-build: ${{ steps.build-plan.outputs.should-build }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6.0.2
        with:
          persist-credentials: false

      - name: Resolve base image digests
        id: base-digests
        run: |
          mkdir -p .base-image-digests
          mkdir -p .current-base-image-digests
          : > .current-base-image-digests/digests.tsv

          resolve_digest() {
            docker buildx imagetools inspect "$1" | awk '/Digest:/ {print $2; exit}'
          }

          for channel in stable testing unstable; do
            for variant in deck gnome kde; do
              case "$variant" in
                deck)
                  image="ghcr.io/ublue-os/bazzite-deck"
                  ;;
                gnome)
                  image="ghcr.io/ublue-os/bazzite-gnome"
                  ;;
                kde)
                  image="ghcr.io/ublue-os/bazzite"
                  ;;
              esac

              ref="${image}:${channel}"
              echo "Resolving ${ref}"
              if digest="$(resolve_digest "${ref}")"; then
                printf '%s\t%s\t%s\t%s\n' \
                  "$channel" \
                  "$variant" \
                  "$image" \
                  "$digest" >> .current-base-image-digests/digests.tsv
              else
                echo "::warning::Could not resolve ${ref}; skipping this channel/variant."
              fi
            done
          done

          cat .current-base-image-digests/digests.tsv

          cache_key="bazzite-channel-digests-$(sha256sum .current-base-image-digests/digests.tsv | awk '{print $1}')"
          echo "cache-key=${cache_key}" >> "${GITHUB_OUTPUT}"
          {
            echo "digests-tsv<<EOF"
            cat .current-base-image-digests/digests.tsv
            echo "EOF"
          } >> "${GITHUB_OUTPUT}"

      - name: Restore base digest cache
        id: base-digest-cache
        uses: actions/cache/restore@v5.0.5
        with:
          path: .base-image-digests
          key: ${{ steps.base-digests.outputs.cache-key }}
          restore-keys: |
            bazzite-channel-digests-
            bazzite-stable-digests-

      - name: Prepare build matrices
        id: build-plan
        run: |
          force_args=()
          if [[ "${FORCE_BUILD}" == "true" ]]; then
            force_args+=(--force)
          fi

          previous_file=".base-image-digests/digests.tsv"
          if [[ ! -f "$previous_file" && -f ".base-image-digests/digests.txt" ]]; then
            previous_file=".base-image-digests/digests.txt"
          fi

          scripts/prepare-build-matrices.py \
            --current .current-base-image-digests/digests.tsv \
            --previous "$previous_file" \
            "${force_args[@]}"
        env:
          FORCE_BUILD: ${{ github.event_name == 'workflow_dispatch' && inputs.force_build == true }}

  bluebuild:
    name: Build Custom Image
    needs: base-digests
    if: needs.base-digests.outputs.normal-count != '0' && github.ref_name != '40cu'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write
    strategy:
      fail-fast: false
      max-parallel: 1
      matrix: ${{ fromJson(needs.base-digests.outputs.normal-matrix) }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6.0.2
        with:
          persist-credentials: false

      - name: Maximize build space
        uses: hastd/free-disk-space@68572aeaadb7f76bd408246328e95926323402b5
        with:
          skip-if-available: "80G"

      - name: Set up Docker Buildx
        run: |
          docker buildx create --name bluebuild-builder --driver docker-container --use
          docker buildx inspect --bootstrap

      - name: Install BlueBuild
        run: |
          set -euo pipefail

          sudo docker create \
            --name blue-build-installer \
            ghcr.io/blue-build/cli:v0.9-installer
          sudo docker cp blue-build-installer:/out/bluebuild /usr/bin/bluebuild
          sudo docker rm blue-build-installer

          bluebuild --version

      - name: Install cosign
        env:
          COSIGN_VERSION: v3.0.6
        run: |
          set -euo pipefail

          curl -fsSL \
            -o cosign \
            "https://github.com/sigstore/cosign/releases/download/${COSIGN_VERSION}/cosign-linux-amd64"
          sudo install -m 0755 cosign /usr/local/bin/cosign
          rm cosign

          cosign version

      - name: Build Custom Image
        env:
          BB_BUILD_PUSH: "true"
          BB_PASSWORD: ${{ github.token }}
          BB_USERNAME: ${{ github.repository_owner }}
          BB_REGISTRY: ghcr.io
          BB_REGISTRY_NAMESPACE: ${{ github.repository_owner }}
          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
          COSIGN_PASSWORD: ""
          GH_TOKEN: ${{ github.token }}
          GH_PR_EVENT_NUMBER: ${{ github.event.number }}
          RUST_LOG_STYLE: always
          CLICOLOR_FORCE: "1"
        run: |
          generated_recipe="recipes/.generated-${{ matrix.channel }}-${{ matrix.recipe }}"
          scripts/render-channel-recipe.py \
            --recipe "recipes/${{ matrix.recipe }}" \
            --output "$generated_recipe" \
            --channel "${{ matrix.channel }}" \
            --name "${{ matrix.image_name }}"

          bluebuild build -v "$generated_recipe"

  bluebuild_40cu:
    name: Build Custom 40CU Image
    needs: base-digests
    if: needs.base-digests.outputs.fortycu-count != '0' && (github.ref_name == github.event.repository.default_branch || github.ref_name == '40cu')
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write
    strategy:
      fail-fast: false
      max-parallel: 1
      matrix: ${{ fromJson(needs.base-digests.outputs.fortycu-matrix) }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6.0.2
        with:
          persist-credentials: false

      - name: Maximize build space
        uses: hastd/free-disk-space@68572aeaadb7f76bd408246328e95926323402b5
        with:
          skip-if-available: "80G"

      - name: Set up Docker Buildx
        run: |
          docker buildx create --name bluebuild-builder --driver docker-container --use
          docker buildx inspect --bootstrap

      - name: Install BlueBuild
        run: |
          set -euo pipefail

          sudo docker create \
            --name blue-build-installer \
            ghcr.io/blue-build/cli:v0.9-installer
          sudo docker cp blue-build-installer:/out/bluebuild /usr/bin/bluebuild
          sudo docker rm blue-build-installer

          bluebuild --version

      - name: Install cosign
        env:
          COSIGN_VERSION: v3.0.6
        run: |
          set -euo pipefail

          curl -fsSL \
            -o cosign \
            "https://github.com/sigstore/cosign/releases/download/${COSIGN_VERSION}/cosign-linux-amd64"
          sudo install -m 0755 cosign /usr/local/bin/cosign
          rm cosign

          cosign version

      - name: Build Custom 40CU Image
        env:
          BB_BUILD_PUSH: "true"
          BB_PASSWORD: ${{ github.token }}
          BB_USERNAME: ${{ github.repository_owner }}
          BB_REGISTRY: ghcr.io
          BB_REGISTRY_NAMESPACE: ${{ github.repository_owner }}
          COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
          COSIGN_PASSWORD: ""
          GH_TOKEN: ${{ github.token }}
          GH_PR_EVENT_NUMBER: ${{ github.event.number }}
          RUST_LOG_STYLE: always
          CLICOLOR_FORCE: "1"
        run: |
          generated_recipe="recipes/.generated-${{ matrix.channel }}-${{ matrix.recipe }}"
          scripts/render-channel-recipe.py \
            --recipe "recipes/${{ matrix.recipe }}" \
            --output "$generated_recipe" \
            --channel "${{ matrix.channel }}" \
            --name "${{ matrix.image_name }}"

          bluebuild build -v "$generated_recipe"

  save-base-digests:
    name: Save Bazzite channel digest cache
    needs:
      - base-digests
      - bluebuild
      - bluebuild_40cu
    if: always() && needs.base-digests.outputs.should-build == 'true' && (needs.bluebuild.result == 'success' || needs.bluebuild.result == 'skipped') && (needs.bluebuild_40cu.result == 'success' || needs.bluebuild_40cu.result == 'skipped')
    runs-on: ubuntu-latest
    steps:
      - name: Record base image digests
        run: |
          mkdir -p .base-image-digests

          cat > .base-image-digests/digests.tsv <<'EOF'
          ${{ needs.base-digests.outputs.digests-tsv }}
          EOF

          sed -i 's/^          //' .base-image-digests/digests.tsv
          cat .base-image-digests/digests.tsv

      - name: Save base digest cache
        uses: actions/cache/save@v5.0.5
        with:
          path: .base-image-digests
          key: ${{ needs.base-digests.outputs.cache-key }}

  publish-release:
    name: Publish GitHub Release
    needs:
      - base-digests
      - bluebuild
      - bluebuild_40cu
    if: needs.base-digests.outputs.should-build == 'true' && github.ref_name == github.event.repository.default_branch && (needs.bluebuild.result == 'success' || needs.bluebuild.result == 'skipped') && (needs.bluebuild_40cu.result == 'success' || needs.bluebuild_40cu.result == 'skipped')
    runs-on: ubuntu-latest
    permissions:
      contents: write
      packages: read
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6.0.2
        with:
          persist-credentials: false

      - name: Publish grouped release
        env:
          GH_TOKEN: ${{ github.token }}
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
        run: |
          set -euo pipefail

          release_date="$(date -u +%Y.%m.%d)"

          scripts/publish-release.sh \
            --date "${release_date}" \
            --owner "${{ github.repository_owner }}" \
            --repo "${{ github.event.repository.name }}" \
            --target "${GITHUB_SHA}" \
            --run-url "${RUN_URL}" \
            --publish