name: "Build Nixpkgs manual"

permissions: read-all

on:
  pull_request_target:
    branches:
      - master
    paths:
      - 'doc/**'
      - 'lib/**'

jobs:
  nixpkgs:
    runs-on: ubuntu-latest
    if: github.repository_owner == 'NixOS'
    steps:
      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
        with:
          # pull_request_target checks out the base branch by default
          ref: refs/pull/${{ github.event.pull_request.number }}/merge
      - uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
        with:
          # explicitly enable sandbox
          extra_nix_config: sandbox = true
      - uses: cachix/cachix-action@18cf96c7c98e048e10a83abd92116114cd8504be # v14
        with:
          # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
          name: nixpkgs-ci
          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
      - name: Building Nixpkgs manual
        run: NIX_PATH=nixpkgs=$(pwd) nix-build --option restrict-eval true pkgs/top-level/release.nix -A manual -A manual.tests