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modules/greetd/default.nix

@@ -0,0 +1,25 @@
+{config, lib, pkgs, ... }:
+
+with lib;
+let
+  cfg = config.modules.greetd;
+in {
+  options.modules.greetd = {
+    enable = mkEnableOption "greetd";
+    command = mkOption {
+      type = types.str;
+      default = "";
+      description = "Command to run to show greeter.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.greetd = {
+      enable = true;
+      settings.default_session = {
+        command = cfg.command;
+        user = "greeter";
+      };
+    };
+  };
+}