From d8f29e12b5740238c6cdc8e909501776c358464c Mon Sep 17 00:00:00 2001
From: derped <derped@ophanim.de>
Date: Fri, 21 Mar 2025 23:51:29 +0100
Subject: [PATCH] hooks/pre-commit: make sure to use nix-fmt from flake

---
 hooks/pre-commit | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/hooks/pre-commit b/hooks/pre-commit
index 7c1296a..b214874 100755
--- a/hooks/pre-commit
+++ b/hooks/pre-commit
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 printf "%s\n" "Running nixfmt pre-commit hook.";
 if ! which grep >/dev/null; then
@@ -6,15 +7,13 @@ if ! which grep >/dev/null; then
   exit 1;
 fi;
 
-if ! which nixfmt >/dev/null; then
-  printf '%s\n' "ERR: nixfmt not found.";
-  exit 1;
-fi;
+ARCH="$(uname -m)-$(uname | tr "[:upper:]" "[:lower:]")"
+NIX_FMT="$(nix build --no-link --print-out-paths .#formatter."${ARCH}")"
 
 RESULT=0;
 for file in $(git diff --name-only --cached); do
   if grep -q "\.nix$" <<< "${file}"; then
-    nixfmt -c <<< "$(git cat-file blob :"${file}")" 2> >(sed "s|<stdin>|${file}|");
+    "${NIX_FMT}"/bin/nixfmt -c <<< "$(git cat-file blob :"${file}")" 2> >(sed "s|<stdin>|${file}|");
     RESULT=$(( RESULT || $? ));
   fi;
 done;