Initial commit

modules/desktop/greetd.nix

@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.my.desktop.greetd;
+in
+{
+  options.my.desktop.greetd = {
+    user = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "User account that runs the default session.";
+    };
+
+    command = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      description = "Command to run for the default session (use an absolute path).";
+    };
+  };
+
+  config = {
+    assertions = [
+      {
+        assertion = cfg.user != null;
+        message = "my.desktop.greetd.user must be set.";
+      }
+      {
+        assertion = cfg.command != null;
+        message = "my.desktop.greetd.command must be set (use an absolute path like \"${pkgs.sway}/bin/sway\").";
+      }
+    ];
+
+    services.greetd = {
+      enable = true;
+      settings.default_session = {
+        user = cfg.user;
+        command = cfg.command;
+      };
+    };
+  };
+}