From a39124bffc4235b31c1125a09688fd19f550cc78 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Moritz=20J=C3=B6rg?= <moritz.jorg@oceanbox.io>
Date: Sun, 31 May 2026 21:25:54 +0200
Subject: [PATCH] fix: Add formatter

---
 .envrc                  |  2 ++
 by-name/sz3/default.nix | 15 +++++++--------
 npins/sources.json      | 13 +++++++++++++
 shell.nix               |  6 ++++--
 tools/treefmt.nix       | 22 ++++++++++++++++++++++
 5 files changed, 48 insertions(+), 10 deletions(-)
 create mode 100644 .envrc
 create mode 100644 tools/treefmt.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..21dccbd
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,2 @@
+# shellcheck shell=bash
+use nix
diff --git a/by-name/sz3/default.nix b/by-name/sz3/default.nix
index 83065aa..e347855 100644
--- a/by-name/sz3/default.nix
+++ b/by-name/sz3/default.nix
@@ -24,14 +24,13 @@ stdenv.mkDerivation {
     pkg-config
   ];
 
-  buildInputs =
-    [
-      zstd
-      gsl
-    ]
-    ++ lib.optionals stdenv.cc.isClang [
-      llvmPackages.openmp
-    ];
+  buildInputs = [
+    zstd
+    gsl
+  ]
+  ++ lib.optionals stdenv.cc.isClang [
+    llvmPackages.openmp
+  ];
 
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
diff --git a/npins/sources.json b/npins/sources.json
index c4e5084..ed21045 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -5,6 +5,19 @@
       "name": "nixos-unstable",
       "url": "https://releases.nixos.org/nixos/unstable/nixos-26.05pre1004030.64c08a7ca051/nixexprs.tar.xz",
       "hash": "sha256-NpH8iEQ5JHv/BtUuzTEXUMDxPLetCDzIv4OxL8H7Kps="
+    },
+    "treefmt-nix": {
+      "type": "Git",
+      "repository": {
+        "type": "GitHub",
+        "owner": "numtide",
+        "repo": "treefmt-nix"
+      },
+      "branch": "main",
+      "submodules": false,
+      "revision": "db947814a175b7ca6ded66e21383d938df01c227",
+      "url": "https://github.com/numtide/treefmt-nix/archive/db947814a175b7ca6ded66e21383d938df01c227.tar.gz",
+      "hash": "sha256-eynAfOmbmxJnkp7YewvCEbShNnnYJ9gLLqkzsYtBPeM="
     }
   },
   "version": 7
diff --git a/shell.nix b/shell.nix
index 3339b29..5105b17 100644
--- a/shell.nix
+++ b/shell.nix
@@ -2,12 +2,14 @@
   sources ? import ./npins,
   pkgs ? import sources.nixpkgs { },
 }:
-
+let
+  treefmt = pkgs.callPackage ./tools/treefmt.nix { inherit sources; };
+in
 pkgs.mkShellNoCC {
   packages = [
     pkgs.npins
     pkgs.nix-init
-    pkgs.nixfmt-rfc-style
     pkgs.nix-update
+    treefmt
   ];
 }
diff --git a/tools/treefmt.nix b/tools/treefmt.nix
new file mode 100644
index 0000000..acbeb92
--- /dev/null
+++ b/tools/treefmt.nix
@@ -0,0 +1,22 @@
+{ pkgs, sources, ... }:
+let
+  treefmt-nix = import sources.treefmt-nix;
+in
+treefmt-nix.mkWrapper pkgs {
+  projectRootFile = ".git/config";
+  programs = {
+    nixfmt.enable = true;
+    deadnix.enable = true;
+    statix = {
+      enable = true;
+      disabled-lints = [
+        "manual_inherit_from"
+        "repeated_keys"
+      ];
+    };
+    shellcheck.enable = true;
+  };
+  settings.global.excludes = [
+    "npins/default.nix"
+  ];
+}