#! /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/files.nix

modules/home-environment.nix

modules/programs/zsh.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[@]}"