chore: Prevent use of nested shell on gnome desktop

Author: KyleGospo

spec_files/steamdeck-gnome-presets/steamdeck-gnome-presets.spec

@@ -10,8 +10,9 @@ Source:         {{{ git_dir_pack }}}
 BuildArch:      noarch
 
 Requires:       steamdeck-backgrounds
-Requires:       zenity
 Requires:       dbus-x11
+Requires:       zenity
+Requires:       inxi
 
 Conflicts:      steamdeck-kde-presets
 Conflicts:      steamdeck-kde-presets-desktop

spec_files/steamdeck-gnome-presets/usr/bin/steamos-nested-desktop

@@ -1,4 +1,9 @@
 #!/usr/bin/env bash
+if [[ "$(inxi -Gxx | grep compositor)" =~ "gnome-shell" ]]; then
+	zenity --info --text "This utility is meant to be executed through Steam Game Mode only."
+	exit 0
+fi
+
 source /etc/default/steamos-nested-desktop
 
 # Remove the performance overlay, it meddles with some tasks