From e39b3dac309b340dfc716f85cbf4b2099228ba9d Mon Sep 17 00:00:00 2001
From: Simon Bruder <simon@sbruder.de>
Date: Fri, 2 Oct 2020 17:20:30 +0200
Subject: [PATCH] Use pre-commit hook from pre-commit-hooks.nix

---
 .gitignore              |  3 ++-
 .pre-commit-config.yaml |  6 ------
 default.nix             | 11 +++++++++++
 shell.nix               |  8 ++------
 4 files changed, 15 insertions(+), 13 deletions(-)
 delete mode 100644 .pre-commit-config.yaml
 create mode 100644 default.nix

diff --git a/.gitignore b/.gitignore
index 79d81df..0f6e567 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
-wordclock_credentials.py
+/.pre-commit-config.yaml
 __pycache__
+wordclock_credentials.py
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
deleted file mode 100644
index d0a5a47..0000000
--- a/.pre-commit-config.yaml
+++ /dev/null
@@ -1,6 +0,0 @@
-repos:
-  - repo: https://github.com/psf/black
-    rev: stable
-    hooks:
-      - id: black
-        language_version: python3
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..dbe1513
--- /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 = {
+      black.enable = true;
+    };
+  };
+}
diff --git a/shell.nix b/shell.nix
index f7886ab..5d14712 100644
--- a/shell.nix
+++ b/shell.nix
@@ -2,13 +2,9 @@
 
 pkgs.mkShell {
   nativeBuildInputs = with pkgs; [
-    gitAndTools.pre-commit
-    (python3.withPackages(ps: [ ps.virtualenv ]))
+    nixpkgs-fmt
   ];
   shellHook = ''
-    # black’s pre-commit hook builds a wheel (zip file) for black and fails
-    # when the timestamp is lower than 1980 (due to zip limitations)
-    export SOURCE_DATE_EPOCH=315532800
-    pre-commit install -f >/dev/null
+    ${(import ./default.nix).pre-commit-check.shellHook}
   '';
 }