From 9b26507e14c2d3b0a167e037f424425ba3676211 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Sat, 11 Jun 2022 11:56:10 +0200
Subject: [PATCH] add treefmt check

---
 nix/checks/treefmt.nix | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 nix/checks/treefmt.nix

diff --git a/nix/checks/treefmt.nix b/nix/checks/treefmt.nix
new file mode 100644
index 0000000..5e165a4
--- /dev/null
+++ b/nix/checks/treefmt.nix
@@ -0,0 +1,22 @@
+{
+  runCommandNoCC,
+  gofumpt,
+  alejandra,
+  python3,
+  treefmt,
+}:
+runCommandNoCC "treefmt" {
+  nativeBuildInputs = [
+    gofumpt
+    treefmt
+    alejandra
+    python3.pkgs.flake8
+    python3.pkgs.black
+  ];
+} ''
+  # keep timestamps so that treefmt is able to detect mtime changes
+  cp --no-preserve=mode --preserve=timestamps -r ${../..} source
+  cd source
+  HOME=$TMPDIR treefmt --no-cache --fail-on-change
+  touch $out
+''