devShell.nix

@@ -1,4 +1,4 @@
-{ inputs, ... }:
+{ ... }:
 {
   perSystem =
     {
@@ -9,7 +9,6 @@
     }:
     let
       writers = pkgs.callPackage ./pkgs/builders/script-writers.nix { };
-      inherit (pkgs.callPackage inputs.git-hooks { }) lib;
 
       ansiEscapes = {
         reset = ''\033[0m'';
@@ -22,11 +21,6 @@
       select-shell = writers.writePython3Bin "select-shell" {
         flakeIgnore = [ "E501" ];
       } ./pkgs/scripts/select-shell.py;
-
-      # run treefmt before each commit
-      install-pre-commit-hook =
-        with lib.git-hooks;
-        pre-commit (wrap.abort-on-change config.treefmt.build.wrapper);
     in
     {
       devShells.default = pkgs.mkShell {
@@ -41,8 +35,6 @@
           config.treefmt.build.wrapper
         ];
         shellHook = ''
-          ${install-pre-commit-hook}
-
           echo -e "${ansiEscapes.green}switch to another dev-shell using: select-shell${ansiEscapes.reset}"
         '';
       };

flake.lock

@@ -40,22 +40,6 @@
         "type": "github"
       }
     },
-    "git-hooks": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1716413087,
-        "narHash": "sha256-nSTIB7JeJGBGsvtqlyfhUByh/isyK1nfOq2YMxUOFJQ=",
-        "owner": "fricklerhandwerk",
-        "repo": "git-hooks",
-        "rev": "99a78fcf7dc03ba7b1d5c00af109c1e28ced3490",
-        "type": "github"
-      },
-      "original": {
-        "owner": "fricklerhandwerk",
-        "repo": "git-hooks",
-        "type": "github"
-      }
-    },
     "nixlib": {
       "locked": {
         "lastModified": 1712450863,
@@ -149,7 +133,6 @@
       "inputs": {
         "disko": "disko",
         "flake-parts": "flake-parts",
-        "git-hooks": "git-hooks",
         "nixos-generators": "nixos-generators",
         "nixos-images": "nixos-images",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -21,8 +21,6 @@
     flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
     treefmt-nix.url = "github:numtide/treefmt-nix";
     treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
-    git-hooks.url = "github:fricklerhandwerk/git-hooks";
-    git-hooks.flake = false;
   };
 
   outputs =

scripts/pre-commit

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# To install:
+# ln -sf ../../scripts/pre-commit .git/hooks/pre-commit
+set -o errexit
+set -o nounset
+set -o pipefail
+
+readarray staged < <(git diff --name-only --cached)
+[[ ${#staged[@]} = 0 ]] && exit
+unstash() {
+  local ret=$?
+  set +e
+  git stash pop -q
+  exit "$ret"
+}
+git stash push --quiet --keep-index --message "pre-commit"
+trap unstash EXIT
+nix fmt
+{
+  changed=$(git diff --name-only --exit-code);
+  status=$?;
+} || true
+if [[ $status -ne 0 ]]; then
+  exec 1>&2
+  echo Files changed by pre-commit hook:
+  echo "$changed"
+  exit $status
+fi