configurable git email and name

systems/modules/home/programs/git.nix

@@ -1,11 +1,27 @@
-{ pkgs, ... } :
+{ lib, pkgs, config, ... }:
 
 {
-  programs.git = {
-    enable = true;
-    settings.user = {
-      name = "Armel van Ravels";
-      email = "armel@armel.nl";
+  options.home.git = {
+    userName = lib.mkOption {
+      type = lib.types.str;
+      default = "Armel van Ravels";
+      description = "Default git user.name for this user";
+    };
+
+    userEmail = lib.mkOption {
+      type = lib.types.str;
+      default = "armel@armel.nl";
+      description = "Default git user.email for this user";
+    };
+  };
+
+  config = {
+    programs.git = {
+      enable = true;
+      settings.user = {
+        name = config.home.git.userName;
+        email = config.home.git.userEmail;
+      };
     };
   };
 }