From 99c4de6d6685602009d8d1789595bf822025c548 Mon Sep 17 00:00:00 2001
From: Simon Bruder <simon@sbruder.de>
Date: Fri, 2 Oct 2020 17:15:46 +0200
Subject: [PATCH] Use nixpkgs-fmt hook from pre-commit-hooks.nix

---
 .gitignore      |  3 ++-
 default.nix     | 11 +++++++++++
 pre-commit-hook |  2 --
 shell.nix       |  6 +++---
 4 files changed, 16 insertions(+), 6 deletions(-)
 create mode 100644 default.nix
 delete mode 100755 pre-commit-hook

diff --git a/.gitignore b/.gitignore
index bc27100..ac53f35 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
-/result
 /*.qcow2
+/.pre-commit-config.yaml
+/result
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..fa8c463
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,11 @@
+let
+  nix-pre-commit-hooks = import (builtins.fetchTarball "https://github.com/cachix/pre-commit-hooks.nix/tarball/master");
+in
+{
+  pre-commit-check = nix-pre-commit-hooks.run {
+    src = ./.;
+    hooks = {
+      nixpkgs-fmt.enable = true;
+    };
+  };
+}
diff --git a/pre-commit-hook b/pre-commit-hook
deleted file mode 100755
index b7e7516..0000000
--- a/pre-commit-hook
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/usr/bin/env bash
-nixpkgs-fmt --check .
diff --git a/shell.nix b/shell.nix
index 60f4829..5d14712 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,10 +1,10 @@
-{ pkgs ? import <nixpkgs> { } }:
+{ pkgs ? import <nixpkgs> {} }:
 
 pkgs.mkShell {
   nativeBuildInputs = with pkgs; [
     nixpkgs-fmt
   ];
-  buildPhase = ''
-    ln -f -s ../../pre-commit-hook .git/hooks/pre-commit
+  shellHook = ''
+    ${(import ./default.nix).pre-commit-check.shellHook}
   '';
 }