From d00dcf035543badeb69aac4466897b870afcd63a Mon Sep 17 00:00:00 2001
From: Youwen Wu <youwenw@gmail.com>
Date: Sun, 22 Dec 2024 23:38:14 -0800
Subject: [PATCH] refactor: modularize greeter

---
 hosts/callisto/configuration.nix  |  1 +
 modules/linux/greeter/default.nix | 65 ++++++++++++++++++++++---------
 2 files changed, 47 insertions(+), 19 deletions(-)

diff --git a/hosts/callisto/configuration.nix b/hosts/callisto/configuration.nix
index 4894167..ac1f300 100755
--- a/hosts/callisto/configuration.nix
+++ b/hosts/callisto/configuration.nix
@@ -27,6 +27,7 @@
     theming = {
       enable = true;
     };
+    desktop.greeter.enable = true;
   };
 
   boot = {
diff --git a/modules/linux/greeter/default.nix b/modules/linux/greeter/default.nix
index 556002c..79aa9f7 100644
--- a/modules/linux/greeter/default.nix
+++ b/modules/linux/greeter/default.nix
@@ -1,25 +1,52 @@
-{ pkgs, ... }:
 {
-  services.greetd = {
-    enable = true;
-    settings = {
-      default_session = {
-        command = ''
-          ${pkgs.greetd.tuigreet}/bin/tuigreet --time --cmd Hyprland --remember --greeting "Welcome, generation $(readlink /nix/var/nix/profiles/system | grep -o '[0-9]*'). Access is restricted to authorized personnel only."
-        '';
-        user = "greeter";
-      };
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.liminalOS.desktop.greeter;
+in
+{
+  options.liminalOS.desktop.greeter = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = config.liminalOS.desktop.enable;
+      description = ''
+        Whether to enable and set up tui-greet, the default greeter for liminalOS.
+      '';
+    };
+    command = lib.mkOption {
+      type = lib.types.str;
+      default = if config.liminalOS.desktop.enable then "Hyprland" else "";
+      description = ''
+        Command for the greeter to execute to launch the desktop. If the liminalOS Hyprland Desktop is enabled, defaults to `Hyprland`.
+      '';
     };
   };
 
-  systemd.services.greetd.serviceConfig = {
-    Type = "idle";
-    StandardInput = "tty";
-    StandardOutput = "tty";
-    StandardError = "journal"; # Without this errors will spam on screen
-    # Without these bootlogs will spam on screen
-    TTYReset = true;
-    TTYVHangup = true;
-    TTYVTDisallocate = true;
+  config = lib.mkIf cfg.enable {
+    services.greetd = {
+      enable = true;
+      settings = {
+        default_session = {
+          command = ''
+            ${pkgs.greetd.tuigreet}/bin/tuigreet --time --cmd Hyprland --remember --greeting "Welcome, generation $(readlink /nix/var/nix/profiles/system | grep -o '[0-9]*'). Access is restricted to authorized personnel only."
+          '';
+          user = "greeter";
+        };
+      };
+    };
+
+    systemd.services.greetd.serviceConfig = {
+      Type = "idle";
+      StandardInput = "tty";
+      StandardOutput = "tty";
+      StandardError = "journal"; # Without this errors will spam on screen
+      # Without these bootlogs will spam on screen
+      TTYReset = true;
+      TTYVHangup = true;
+      TTYVTDisallocate = true;
+    };
   };
 }