From f18dfa0a8de96c25547061eb9f23a666ec11aaca Mon Sep 17 00:00:00 2001
From: Barrett Ruth <br.barrettruth@gmail.com>
Date: Wed, 4 Mar 2026 14:11:41 -0500
Subject: [PATCH] ci: nix

---
 flake.nix     | 5 ++++-
 scripts/ci.sh | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/flake.nix b/flake.nix
index 2753286..e95338d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,9 +13,12 @@
       ...
     }:
     let
-      forEachSystem = f: nixpkgs.lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});
+      forEachSystem =
+        f: nixpkgs.lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});
     in
     {
+      formatter = forEachSystem (pkgs: pkgs.nixfmt-tree);
+
       devShells = forEachSystem (pkgs: {
         default = pkgs.mkShell {
           packages = [
diff --git a/scripts/ci.sh b/scripts/ci.sh
index 7b5f52b..18dc321 100755
--- a/scripts/ci.sh
+++ b/scripts/ci.sh
@@ -4,4 +4,6 @@ set -eu
 nix develop --command stylua --check .
 git ls-files '*.lua' | xargs nix develop --command selene --display-style quiet
 nix develop --command prettier --check .
+nix fmt
+git diff --exit-code -- '*.nix'
 nix develop --command lua-language-server --check . --checklevel=Warning