From 2e0ee8d11e8f506f2f2ea9d1ab6cd03799a51cfa Mon Sep 17 00:00:00 2001
From: Skyler Grey <minion@freshlybakedca.ke>
Date: Thu, 25 Sep 2025 20:41:09 +0000
Subject: [PATCH] ci(treewide): add deadnix
Change-Id: vmslusqkrqomnwukklmxvsupqtsuyyzy

deadnix is a package to find unused nix code, we can add it to enforce
that we don't leave let bindings/inputs/etc. around when they are not
needed
---
 .tangled/workflows/deadnix.yml | 21 +++++++++++++++++++++
 packetmix/nilla.nix            |  1 +
 2 files changed, 22 insertions(+)
 create mode 100644 .tangled/workflows/deadnix.yml

diff --git a/.tangled/workflows/deadnix.yml b/.tangled/workflows/deadnix.yml
new file mode 100644
index 00000000..d4f557b5
--- /dev/null
+++ b/.tangled/workflows/deadnix.yml
@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2025 FreshlyBakedCake
+#
+# SPDX-License-Identifier: MIT
+
+when:
+  - event: ["push", "pull_request"]
+    branch: ["main"]
+
+engine: nixery
+
+dependencies:
+  nixpkgs:
+    - ansifilter
+    - deadnix
+
+steps:
+  - name: Check for unused nix bindings
+    command: |
+      set -eo pipefail
+
+      deadnix --exclude **/npins --no-underscore --fail | ansifilter
diff --git a/packetmix/nilla.nix b/packetmix/nilla.nix
index d63068e7..d58fbc3c 100644
--- a/packetmix/nilla.nix
+++ b/packetmix/nilla.nix
@@ -134,6 +134,7 @@ nilla.create (
               config.inputs.nilla-home.result.packages.nilla-home.result.${system}
               config.inputs.nilla-nixos.result.packages.nilla-nixos.result.${system}
               config.inputs.nixos-unstable.result.${system}.quickshell
+              config.inputs.nixpkgs.result.${system}.deadnix
               config.packages.nilla-fmt.result.${system}
               config.packages.treefmt.result.${system}
               (config.inputs.npins.result { inherit pkgs system; })
-- 
2.43.0