From 6348336db0e0b17ab6d9c73bc8206db84ebf00d1 Mon Sep 17 00:00:00 2001
From: Matt Sturgeon <matt@sturgeon.me.uk>
Date: Thu, 5 Dec 2024 20:47:26 +0000
Subject: [PATCH] modules/lazyload: init w/ assertion

Adds a global lazyloading assertion. No module options yet.
---
 modules/default.nix  |  1 +
 modules/lazyload.nix | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 modules/lazyload.nix

diff --git a/modules/default.nix b/modules/default.nix
index 739a30db84..49c2ddf619 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -16,6 +16,7 @@
     ./filetype.nix
     ./highlights.nix
     ./keymaps.nix
+    ./lazyload.nix
     ./lua-loader.nix
     ./opts.nix
     ./output.nix
diff --git a/modules/lazyload.nix b/modules/lazyload.nix
new file mode 100644
index 0000000000..17bb325f9a
--- /dev/null
+++ b/modules/lazyload.nix
@@ -0,0 +1,30 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  implementations = [
+    "lz-n"
+    "lazy"
+  ];
+in
+{
+  config = {
+    assertions =
+      let
+        enabled = builtins.filter (x: config.plugins.${x}.enable) implementations;
+        count = builtins.length enabled;
+      in
+      [
+        {
+          assertion = count < 2;
+          message = ''
+            You have multiple lazy-loaders enabled:
+            ${lib.concatImapStringsSep "\n" (i: x: "${toString i}. plugins.${x}") enabled}
+            Please ensure only one is enabled at a time.
+          '';
+        }
+      ];
+  };
+}