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path: root/.github/workflows/ci.yaml
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name: CI

on:
  pull_request:
  workflow_call:
    secrets:
      CACHIX_AUTH_TOKEN:
        description: "auth token for cachi"
  workflow_dispatch:

jobs:
  eval:
    name: Evaluate flake
    runs-on: ubuntu-latest

    outputs:
      matrix: ${{ steps.eval.outputs.matrix }}

    steps:
      - uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v9

      - name: Setup Cachix
        uses: cachix/cachix-action@v13
        with:
          name: getchoo
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - name: Evaluate jobs
        id: eval
        run: |
          echo "matrix=$(nix eval --show-trace --json .#workflowMatrix)" >> "$GITHUB_OUTPUT"

  build:
    needs: eval

    strategy:
      fail-fast: false
      matrix: ${{ fromJSON(needs.eval.outputs.matrix) }}

    name: Build (${{ matrix.attr }})
    runs-on: ${{ matrix.os }}

    env:
      JOBS: "hydraJobs"

    steps:
      - uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v9

      - name: Setup Cachix
        uses: cachix/cachix-action@v13
        with:
          name: getchoo
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - name: Run build
        run: |
          for url in "https://cache.nixos.org" "https://getchoo.cachix.org"; do
            if nix eval --raw .#"$JOBS".${{ matrix.attr }} \
              | cut -c12-43 \
              | xargs -I {} curl -f "$url"/{}.narinfo &> /dev/null; then
              echo ${{ matrix.attr }} is already cached in $url!
            fi
          done

          nix build --print-build-logs --fallback \
            .#"$JOBS".${{ matrix.attr }}

  check:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]

    name: Check flake (${{ matrix.os }})
    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@v9

      - name: Setup Cachix
        uses: cachix/cachix-action@v13
        with:
          name: getchoo
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - name: Run check
        run: |
          nix flake check \
            --print-build-logs \
            --fallback \
            --show-trace \
            --option allow-import-from-derivation true

  gate:
    needs: [build, check]

    name: CI Gate
    runs-on: ubuntu-latest

    if: always()

    steps:
      - name: Exit with result
        run: |
          build_result="${{ needs.build.result }}"
          check_result="${{ needs.check.result }}"
          results=("$build_result" "$check_result")
          for result in "${results[@]}"; do [ "$result" != "success" ] && exit 1; done
          exit 0