1 files changed, 43 insertions, 0 deletions
diff --git a/nix/check/nixfmt.nix b/nix/check/nixfmt.nix
new file mode 100644
index 0000000..4d22883
--- /dev/null
+++ b/nix/check/nixfmt.nix
@@ -0,0 +1,43 @@
+#──────────────────────────────────────────────────────────────────────────────┐
+# SPDX-FileCopyrightText: 2025 toastal <https://toast.al/contact/>             │
+# SPDX-License-Identifier: LGPL-2.1-or-later                                   │
+#──────────────────────────────────────────────────────────────────────────────┘
+{
+   lib,
+   runDashCommand,
+   parallel,
+   nixfmt,
+   keepLogOrder ? true,
+}:
+
+runDashCommand
+   {
+      name = "check-nixfmt";
+      runtimeInputs = [
+         parallel
+         nixfmt
+      ];
+      env.src =
+         let
+            fs = lib.fileset;
+         in
+         fs.toSource {
+            root = ../..;
+            fileset =
+               fs.intersection (fs.fileFilter (file: file.hasExt "nix") ../..)
+
+                  (fs.difference (fs.fromSource (lib.cleanSource ../..)) ../tamal);
+         };
+   }
+   /* sh */ ''
+      if [ -z "$src" ]; then
+         echo "Missing \$src" >&2
+         exit 1
+      fi
+      find "$src" -type f \
+         | parallel --will-cite \
+            ${lib.optionalString keepLogOrder "--keep-order"} \
+            --jobs "''${NIX_BUILD_CORES:-1}" \
+            nixfmt --check {} \
+         | tee "$out"
+   ''