name: CI

on:
  push:
    branches: [main]

jobs:
  get-hosts:
    if: "!contains(github.event.head_commit.message, '[skip-ci]')"
    runs-on: self-hosted-x86_64-linux
    outputs:
      matrix: ${{ steps.hosts_out.outputs.matrix }}
    steps:
      - name: repository checkout
        uses: actions/checkout@v4
      - id: hosts_out
        name: set hosts var
        run: |
          {
            echo -n "matrix="
            nix eval --raw --impure --expr '
                let
                    f = configs: builtins.groupBy (n: configs.${n}.pkgs.system) (builtins.attrNames configs);
                in
                    builtins.toJSON (f (builtins.getFlake(builtins.toString ./.)).outputs.nixosConfigurations)'
            echo ""
          }  >> "$GITHUB_OUTPUT"

  x86_64-linux:
    if: |
      !contains(github.event.head_commit.message, '[skip-ci x64]')
      && !contains(github.event.head_commit.message, '[skip-ci]')
    runs-on: self-hosted-x86_64-linux
    needs: [get-hosts]
    strategy:
      fail-fast: false
      matrix:
        host: ${{ fromJson(needs.get-hosts.outputs.matrix).x86_64-linux }}
    steps:
      - name: repository checkout
        uses: actions/checkout@v4
      - name: build host configuration ${{ matrix.host }}
        run: nixos-rebuild build --verbose --flake ".#${{ matrix.host }}"

  aarch64-linux:
    if: |
      !contains(github.event.head_commit.message, '[skip-ci arm64]')
      && !contains(github.event.head_commit.message, '[skip-ci]')
    runs-on: self-hosted-aarch64-linux
    needs: [get-hosts]
    strategy:
      fail-fast: false
      matrix:
        host: ${{ fromJson(needs.get-hosts.outputs.matrix).aarch64-linux }}
    steps:
      - name: repository checkout
        uses: actions/checkout@v4
      - name: build host configuration ${{ matrix.host }}
        run: nixos-rebuild build --verbose --flake ".#${{ matrix.host }}"