about summary refs log tree commit diff
path: root/.github/workflows/check-nix-format.yml
blob: 31e105281a77d2a79b0b11ebc1c04f70ff89c638 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
# This file was copied mostly from check-maintainers-sorted.yaml.
# NOTE: Formatting with the RFC-style nixfmt command is not yet stable. See
# https://github.com/NixOS/rfcs/pull/166.
# Because of this, this action is not yet enabled for all files -- only for
# those who have opted in.
name: Check that Nix files are formatted

on:
  pull_request_target:
permissions:
  contents: read

jobs:
  nixos:
    runs-on: ubuntu-latest
    if: github.repository_owner == 'NixOS'
    steps:
      - uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4.1.3
        with:
          # pull_request_target checks out the base branch by default
          ref: refs/pull/${{ github.event.pull_request.number }}/merge
      - uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
        with:
          # explicitly enable sandbox
          extra_nix_config: sandbox = true
          # fix a commit from nixpkgs-unstable to avoid e.g. building nixfmt
          # from staging
          nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/4b455dc2048f73a79eb3713f342369ff58f93e0b.tar.gz
      - name: Install nixfmt
        run: "nix-env -f '<nixpkgs>' -iAP nixfmt-rfc-style"
      - name: Check that Nix files are formatted according to the RFC style
        # Each environment variable beginning with NIX_FMT_PATHS_ is a list of
        # paths to check with nixfmt.
        env:
          # Format paths related to the Nixpkgs CUDA ecosystem.
          NIX_FMT_PATHS_CUDA: |
            pkgs/development/cuda-modules
            pkgs/test/cuda
            pkgs/top-level/cuda-packages.nix
        # Iterate over all environment variables beginning with NIX_FMT_PATHS_.
        run: |
          for env_var in "${!NIX_FMT_PATHS_@}"; do
            readarray -t paths <<< "${!env_var}"
            if [[ "${paths[*]}" == "" ]]; then
              echo "Error: $env_var is empty."
              exit 1
            fi
            echo "Checking paths: ${paths[@]}"
            if ! nixfmt --check "${paths[@]}"; then
              echo "Error: nixfmt failed."
              exit 1
            fi
          done