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home-manager/format
Naïm Favier 9dd107a1d5
flake: add formatter (#3620)
* format: improve argument handling

For now, fail if the user tries to format a specific file/directory,
or runs the formatter from within a subdirectory.

Handling these situations is slightly tricky because `find -path` is
not very flexible.

* flake: add formatter

This allows running the formatter with `nix fmt`, added in Nix 2.8.

* format: use git ls-files

This is cleaner than `find` and allows us to restrict formatting to
particular files or subdirectories.
2023-06-27 23:32:30 +02:00

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#! /usr/bin/env nix-shell
#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/6616de389ed55fba6eeba60377fc04732d5a207c.tar.gz -i bash -p git gnugrep gnused findutils nixfmt
nixfmt_args=()
files=()
for arg do
case $arg in
-h)
echo "$0 [-c]"
exit
;;
-c)
nixfmt_args+=("$arg")
;;
-*)
echo "unrecognised flag: $arg" >&2
exit 1
;;
*)
files+=("$arg")
;;
esac
done
# The excludes are for files touched by open pull requests and we want
# to avoid merge conflicts.
excludes=(
modules/default.nix
modules/files.nix
modules/home-environment.nix
modules/lib/default.nix
modules/lib/file-type.nix
modules/misc/news.nix
modules/programs/ssh.nix
modules/programs/zsh.nix
tests/default.nix
)
exclude_args=()
for e in "${excludes[@]}"; do
exclude_args+=(-e "$e")
done
git_root=$(git rev-parse --show-toplevel)
git ls-files -z --cached --others --full-name -- "${files[@]}" |
grep -z '\.nix$' |
grep -z -v "${exclude_args[@]}" |
sed -z "s|^|$git_root/|" |
xargs -0 nixfmt "${nixfmt_args[@]}"