first working build of rewrite

modules/system/desktop-environments/tuigreet.nix

@@ -0,0 +1,45 @@
+{config,lib,pkgs,...}:
+let
+  inherit (lib) mkEnableOption mkOption optionalString mkIf types;
+  dmcfg = config.services.xserver.displayManager;
+  cfg = config.speccon18.desktop.tuigreet;
+  gduser = config.services.greetd.settings.default_session.user;
+in {
+  options.speccon18.desktop.tuigreet = {
+    enable = mkEnableOption "enables tuigreet";
+    args = mkOption {
+      default = "--time --asterisks --remember -s ${dmcfg.sessionData.desktops}/share/wayland-sessions:${dmcfg.sessionData.desktops}/share/xsessions";
+      type = types.str;
+    };
+  };
+  config = mkIf cfg.enable {
+    services.greetd = {
+      enable = true;
+      settings = {
+        default_session = {
+          command = "${pkgs.greetd.tuigreet}/bin/tuigreet ${cfg.args}";
+          user = "greeter";
+        };
+      };
+    };
+    # this is a life saver.
+    # literally no documentation about this anywhere.
+    # might be good to write about this...
+    # https://www.reddit.com/r/NixOS/comments/u0cdpi/tuigreet_with_xmonad_how/
+    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;
+      };
+      tmpfiles.rules = [
+        "d /var/cache/tuigreet/ 0755 greeter ${gduser} - -"
+      ];
+    };
+  };
+}