feat: create lib folder, for functions

lib/debug.nix

@@ -0,0 +1,16 @@
+{ ... }:
+{
+  imports = [
+    {lib, config, ... }: {
+      options.tempDebugVar = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        description = "tempDebugVar";
+      };
+    }
+  ];
+
+  environment.etc."debugfile".text = ''
+    ${config.tempDebugVar}
+  '';
+}

lib/hostHelper.nix

@@ -0,0 +1,24 @@
+inArgs: hostname: hostOptions: let
+  nixosSystem =
+    if (hostOptions ? unstable && hostOptions.unstable)
+    then inArgs.nixos-unstable.lib.nixosSystem
+    else inArgs.nixpkgs.lib.nixosSystem;
+in
+  nixosSystem {
+    specialArgs = {inherit inArgs;};
+    modules = [
+      ./hosts/${hostname}
+      #./debug.nix
+      {
+        networking.hostName = hostname;
+
+        # This value determines the NixOS release from which the default
+        # settings for stateful data, like file locations and database versions
+        # on your system were taken. It‘s perfectly fine and recommended to leave
+        # this value at the release version of the first install of this system.
+        # Before changing this value read the documentation for this option
+        # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+        system.stateVersion = hostOptions.stateVersion; # Did you read the comment?
+      }
+    ];
+  }