feat: created variable-based nix configuration

Added variables.nix
Added Syncthing service definition

nixos/configuration.nix

@@ -7,11 +7,10 @@
 		pkgs,
 		...
 }: 
-let
-	globals = import ./globals.nix;
-in
 {
 	imports = [
+		./variables.nix
+		./nvidia.nix
 		./hardware-configuration.nix
 	];
 	boot.loader = {
@@ -58,11 +57,11 @@ in
 		nixPath = lib.mapAttrsToList (n: _: "${n}=flake:${n}") flakeInputs;
 	};
 	networking = {
-		hostName = "${globals.myHostName}";
+		hostName = "${config.myHostName}";
 		networkmanager.enable = true;
 	};
 	users.users = {
-		"${globals.myUserName}" = {
+		"${config.myUserName}" = {
 			initialPassword = "stevenpassword";
 			isNormalUser = true;
 			openssh.authorizedKeys.keys = [

nixos/globals.nix

@@ -1,4 +0,0 @@
-{
-	myUserName = "stvnliu";
-	myHostName = "homelab-nix";
-}

nixos/services/syncthing.service.nix

@@ -1,8 +1,6 @@
 {pkgs, lib, ...}:
-let
-	myUserName = "";
-in
 {
 	enable = true;
-	user = ""
+	user = "${config.myUserName}";
+
 }

nixos/variables.nix

@@ -0,0 +1,15 @@
+{config, pkgs, lib, ...}:
+{
+	
+	# Type definitions for nix variables used in this configuration
+	options = with lib; with types; {
+		myUserName = mkOption { type = str; };
+		myHostName = mkOption { type = str; };
+	};
+	
+	# Default values for this configuration
+	config = {
+		myUserName = "stvnliu";
+		myHostName = "homelab-nix";
+	};
+}