name: "Build and populate cache"
on:
  pull_request:
  push:
    branches:
      - main
      - master
  schedule:
    # rebuild everyday at 2:51
    # TIP: Choose a random time here so not all repositories are build at once:
    # https://www.random.org/clock-times/?num=1&earliest=01%3A00&latest=08%3A00&interval=5&format=html&rnd=new
    - cron:  '51 2 * * *'
jobs:
  tests:
    strategy:
      matrix:
        # Set this to notify the global nur package registry that changes are
        # available.
        #
        # The repo name as used in
        # https://github.com/nix-community/NUR/blob/master/repos.json
        nurRepo:
          - <YOUR_REPO_NAME>
        # Set this to cache your build results in cachix for faster builds
        # in CI and for everyone who uses your cache.
        #
        # Format: Your cachix cache host name without the ".cachix.org" suffix.
        # Example: mycache (for mycache.cachix.org)
        #
        # For this to work, you also need to set the CACHIX_SIGNING_KEY or
        # CACHIX_AUTH_TOKEN secret in your repository secrets settings in
        # Github found at
        # https://github.com/<your_githubname>/nur-packages/settings/secrets
        cachixName:
          - <YOUR_CACHIX_NAME>
        nixPath:
          - nixpkgs=channel:nixos-unstable
          - nixpkgs=channel:nixpkgs-unstable
          - nixpkgs=channel:nixos-22.05
    runs-on: ubuntu-latest
    steps:
    - name: Checkout repository
      uses: actions/checkout@v3
    - name: Install nix
      uses: cachix/install-nix-action@v18
      with:
        nix_path: "${{ matrix.nixPath }}"
        # nix 2.6 breaks restrict-eval, when using the NIX_PATH
        # see https://github.com/NixOS/nix/issues/5980
        install_url: https://releases.nixos.org/nix/nix-2.5.1/install
        extra_nix_config: |
          experimental-features = nix-command flakes
          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
    - name: Show nixpkgs version
      run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
    - name: Setup cachix
      uses: cachix/cachix-action@v12
      # Don't replace <YOUR_CACHIX_NAME> here!
      if: ${{ matrix.cachixName != '<YOUR_CACHIX_NAME>' }}
      with:
        name: ${{ matrix.cachixName }}
        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
    - name: Check evaluation
      run: |
        nix-env -f . -qa \* --meta --xml \
          --allowed-uris https://static.rust-lang.org \
          --option restrict-eval true \
          --option allow-import-from-derivation true \
          --drv-path --show-trace \
          -I nixpkgs=$(nix-instantiate --find-file nixpkgs) \
          -I $PWD
    - name: Build nix packages
      run: nix shell -f '<nixpkgs>' nix-build-uncached -c nix-build-uncached ci.nix -A cacheOutputs
    - name: Trigger NUR update
      # Don't replace <YOUR_REPO_NAME> here!
      if: ${{ matrix.nurRepo != '<YOUR_REPO_NAME>' }}
      run: curl -XPOST "https://nur-update.herokuapp.com/update?repo=${{ matrix.nurRepo }}"