A new start

modules/home/user/default.nix

@@ -0,0 +1,50 @@
+{ lib, config, pkgs, osConfig ? { }, ... }:
+
+let
+  inherit (lib) types mkIf mkDefault mkMerge;
+  inherit (lib.metacfg) mkOpt;
+
+  cfg = config.metacfg.user;
+
+  is-linux = pkgs.stdenv.isLinux;
+  is-darwin = pkgs.stdenv.isDarwin;
+
+  home-directory =
+    if cfg.name == null then
+      null
+    else if is-darwin then
+      "/Users/${cfg.name}"
+    else
+      "/home/${cfg.name}";
+in
+{
+  options.metacfg.user = {
+    enable = mkOpt types.bool false "Whether to configure the user account.";
+    name = mkOpt (types.nullOr types.str) config.snowfallorg.user.name "The user account.";
+
+    fullName = mkOpt types.str "Harald Hoyer" "The full name of the user.";
+    email = mkOpt types.str "harald@hoyer.xyz" "The email of the user.";
+
+    home = mkOpt (types.nullOr types.str) home-directory "The user's home directory.";
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    {
+      assertions = [
+        {
+          assertion = cfg.name != null;
+          message = "metacfg.user.name must be set";
+        }
+        {
+          assertion = cfg.home != null;
+          message = "metacfg.user.home must be set";
+        }
+      ];
+
+      home = {
+        username = mkDefault cfg.name;
+        homeDirectory = mkDefault cfg.home;
+      };
+    }
+  ]);
+}