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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@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
with:
# pull_request_target checks out the base branch by default
ref: refs/pull/${{ github.event.pull_request.number }}/merge
- uses: cachix/install-nix-action@8887e596b4ee1134dae06b98d573bd674693f47c # v26
with:
# explicitly enable sandbox
extra_nix_config: sandbox = true
# fix a commit from nixpkgs-unstable to avoid e.g. building nixfmt
# from staging
nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/4b455dc2048f73a79eb3713f342369ff58f93e0b.tar.gz
- name: Install nixfmt
run: "nix-env -f '<nixpkgs>' -iAP nixfmt-rfc-style"
- name: Check that Nix files are formatted according to the RFC style
# Each environment variable beginning with NIX_FMT_PATHS_ is a list of
# paths to check with nixfmt.
env:
NIX_FMT_PATHS_BSD: pkgs/os-specific/bsd
NIX_FMT_PATHS_MPVSCRIPTS: pkgs/applications/video/mpv/scripts
# Format paths related to the Nixpkgs CUDA ecosystem.
NIX_FMT_PATHS_CUDA: |
pkgs/development/cuda-modules
pkgs/test/cuda
pkgs/top-level/cuda-packages.nix
NIX_FMT_PATHS_K3S: |
nixos/modules/services/cluster/k3s
nixos/tests/k3s
pkgs/applications/networking/cluster/k3s
NIX_FMT_PATHS_VSCODE_EXTS: pkgs/applications/editors/vscode/extensions
NIX_FMT_PATHS_PHP_PACKAGES: pkgs/development/php-packages
NIX_FMT_PATHS_BUILD_SUPPORT_PHP: pkgs/build-support/php
# Iterate over all environment variables beginning with NIX_FMT_PATHS_.
run: |
for env_var in "${!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
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