build.yml

name: "Build"

on:
  push: {}
  pull_request: {}

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
      with:
       fetch-depth: 0
    - uses: cachix/install-nix-action@v23
      with:
        nix_path: nixpkgs=channel:nixos-unstable
    - uses: cachix/cachix-action@v12
      with:
        name: nix-dev
        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
    - name: Build
      run: nix-build
    - name: Copy build from Nix store
      if: github.event_name == 'pull_request'
      run: |
        cp -r -L result real-result
        rm result
        mv real-result result
    - name: Save PR number
      if: github.event_name == 'pull_request'
      run: echo ${{ github.event.number }} > .github/pr
    - name: Upload artifact for deploy preview
      uses: actions/upload-artifact@v3
      if: github.event_name == 'pull_request'
      with:
        name: pr
        path: |
          result/
          .github/pr