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# 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@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
with:
# pull_request_target checks out the base branch by default
ref: refs/pull/${{ github.event.pull_request.number }}/merge
- uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
with:
# explicitly enable sandbox
extra_nix_config: sandbox = true
# fix a commit from nixpkgs-unstable to avoid e.g. building nixfmt
# from staging
nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/4b455dc2048f73a79eb3713f342369ff58f93e0b.tar.gz
- name: Install nixfmt
run: "nix-env -f '<nixpkgs>' -iAP nixfmt-rfc-style"
- name: Check that Nix files are formatted according to the RFC style
# Each environment variable beginning with NIX_FMT_PATHS_ is a list of
# paths to check with nixfmt.
env:
# Format paths related to the Nixpkgs CUDA ecosystem.
NIX_FMT_PATHS_CUDA: |
pkgs/development/cuda-modules
pkgs/test/cuda
pkgs/top-level/cuda-packages.nix
# Iterate over all environment variables beginning with NIX_FMT_PATHS_.
run: |
for env_var in "${!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