refactor *started*

modules/system/localization.nix

@@ -0,0 +1,51 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+let
+  timezone = config.system.timezone;
+  language = config.system.language;
+  locale = config.system.locale;
+
+in
+
+{
+  options = {
+    system = {
+      timezone = lib.mkOption {
+        default = "Europe/Berlin";
+        description = "timezone";
+      };
+      language = lib.mkOption {
+        default = "en_GB.UTF-8";
+        description = "language";
+      };
+      locale = lib.mkOption {
+        default = "de_DE.UTF-8";
+        description = "locale";
+      };
+    };
+  };
+
+  config = {
+    time.timeZone = timezone;
+    i18n = {
+      defaultLocale = language;
+      extraLocaleSettings = {
+        LC_ADDRESS = locale;
+        LC_IDENTIFICATION = locale;
+        LC_MEASUREMENT = locale;
+        LC_MONETARY = locale;
+        LC_NAME = locale;
+        LC_NUMERIC = locale;
+        LC_PAPER = locale;
+        LC_TELEPHONE = locale;
+        LC_TIME = locale;
+      };
+    };
+    console.keyMap = builtins.substring 0 2 locale;
+  };
+}