feat: add lib infrastructure and test it with version check

flake.nix

@@ -181,6 +181,8 @@
         };
       in
         builtins.listToAttrs (builtins.map genSystem listOfHosts);
+      # Additional library functions
+      flake.lib = (builtins.import ./lib) {inherit (inputs.nixpkgs) lib;};
       # Iso for USB
       flake.packages.x86_64-linux.iso = inputs.self.nixosConfigurations.radix-balthica.config.system.build.isoImage;
       # VM for testing

hosts/cerithium-telescopium/default.nix

@@ -1,6 +1,6 @@
 {
   pkgs,
-  lib,
+  inputs,
   ...
 }: {
   imports = [
@@ -27,7 +27,7 @@
     '';
     services.xserver.desktopManager.kodi.package = let
       youtubePlugin = pkgs.kodiPackages.youtube.overrideAttrs (old: rec {
-        version = lib.throwIf (lib.versionOlder hashes.youtubePlugin.version old.version) "Youtube Plugin override outdated" hashes.youtubePlugin.version;
+        version = inputs.self.lib.versionIfNewer hashes.youtubePlugin.version old.version "Youtube Plugin override outdated";
 
         src = pkgs.fetchFromGitHub {
           inherit (hashes.youtubePlugin) hash;

lib/default.nix

@@ -0,0 +1,3 @@
+{lib, ...}: {
+  versionIfNewer = newVersion: oldVersion: message: lib.throwIf (lib.versionOlder newVersion oldVersion) message newVersion;
+}