# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
name: "Build"
on:
  pull_request:
  push:
    branches:
      - main
    paths:
      - ".forgejo/workflows/build.yaml"
      - "flake.lock"

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

jobs:
  nix-build:
    if: github.event.pull_request.draft == false
    strategy:
      fail-fast: false
      matrix:
        include:
          - system: varda
            os: native-aarch64
          - system: telchar
            os: native-x86_64
          - system: gandalf
            os: native-x86_64
          - system: telperion
            os: native-x86_64
    runs-on: ${{ matrix.os }}
    env:
      PATH: ${{ format('{0}:{1}', '/run/current-system/sw/bin', env.PATH) }}
    steps:
      - name: Checkout repository
        uses: https://github.com/actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Set up Cachix
        uses: https://github.com/cachix/cachix-action@v15
        if: ${{ !github.event.pull_request.head.repo.fork }}
        with:
          name: hsndev
          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'

      - name: Garbage collect build dependencies
        run: nix-collect-garbage

      - name: Build previous ${{ matrix.system }} system
        shell: bash
        run: |
          nix build git+https://git.hsn.dev/jahanson/mochi#top.${{ matrix.system }} \
            -v --log-format raw --profile ./profile
      - name: Build new ${{ matrix.system }} system
        shell: bash
        run: |
          nix build ".#top.${{ matrix.system }}" --profile ./profile --fallback -v \
            > >(tee stdout.log) 2> >(tee /tmp/nix-build-err.log >&2)
      - name: Check for build failure
        if: failure()
        run: |
          drv=$(grep "For full logs, run" /tmp/nix-build-err.log | grep -oE "/nix/store/.*.drv")
          if [ -n $drv ]; then
            nix log $drv
            echo $drv
          fi
          exit 1
      - name: Diff profile
        id: diff
        run: |
          nix profile diff-closures --profile ./profile
          delimiter="$(openssl rand -hex 16)"
          echo "diff<<${delimiter}" >> "${GITHUB_OUTPUT}"
          nix profile diff-closures --profile ./profile | perl -pe 's/\e\[[0-9;]*m(?:\e\[K)?//g' >> "${GITHUB_OUTPUT}"
          echo "${delimiter}" >> "${GITHUB_OUTPUT}"
      # - name: Comment report in pr
      #   uses: https://github.com/marocchino/sticky-pull-request-comment@v2
      #   with:
      #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      #     header: ".#top.${{ matrix.system }}"
      #     message: |
      #       ### Report for `${{ matrix.system }}`

      #       <summary> Version changes </summary> <br>
      #       <pre> ${{ steps.diff.outputs.diff }} </pre>
      # - name: Push to Cachix
      #   if: success()
      #   env:
      #     CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}
      #   run: nix build ".#top.${{ matrix.system }}" --json | jq -r .[].drvPath | cachix push hsndev
  nix-build-success:
    if: ${{ always() }}
    needs:
      - nix-build
    name: Nix Build Successful
    runs-on: docker
    steps:
      - if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
        name: Check matrix status
        run: exit 1