Allow setting WM_CLASS and WM_NAME when creating new OS windows with the launch command

Author: kovidgoyal

docs/changelog.rst

@@ -57,6 +57,9 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 - Fix incorrect rendering of selection when using rectangular select and
   scrolling (:iss:`2351`)
 
+- Allow setting WM_CLASS and WM_NAME when creating new OS windows with the
+  launch command (:option:`launch --os-window-class`)
+
 - macOS: When switching input method while a pending multi-key input is in
   progress, clear the pending input (:iss:`2358`)
 

kitty/boss.py

@@ -198,12 +198,12 @@ def add_os_window(
     ) -> int:
         if os_window_id is None:
             opts_for_size = opts_for_size or getattr(startup_session, 'os_window_size', None) or self.opts
-            cls = wclass or self.args.cls or appname
+            wclass = wclass or self.args.cls or appname
             with startup_notification_handler(do_notify=startup_id is not None, startup_id=startup_id) as pre_show_callback:
                 os_window_id = create_os_window(
                         initial_window_size_func(opts_for_size, self.cached_values),
                         pre_show_callback,
-                        appname, wname or self.args.name or cls, cls)
+                        appname, wname or self.args.name or wclass, wclass)
         tm = TabManager(os_window_id, self.opts, self.args, startup_session)
         self.os_window_map[os_window_id] = tm
         return os_window_id

kitty/launch.py

@@ -136,6 +136,18 @@ def options_spec() -> str:
 --marker
 Create a marker that highlights text in the newly created window. The syntax is
 the same as for the :code:`toggle_marker` map action (see :doc:`/marks`).
+
+
+--os-window-class
+Set the WM_CLASS property on X11 and the application id property on Wayland for
+the newly created OS Window when using :option:`launch --type`=os-window.
+Defaults to whatever is used by the parent kitty process, which in turn
+defaults to :code:`kitty`.
+
+
+--os-window-name
+Set the WM_NAME property on X11 for the newly created OS Window when using
+:option:`launch --type`=os-window. Defaults to :option:`launch --os-window-class`.
 '''
 
 
@@ -169,7 +181,7 @@ def tab_for_window(boss: Boss, opts: LaunchCLIOptions, target_tab: Optional[Tab]
         else:
             tab = None
     elif opts.type == 'os-window':
-        oswid = boss.add_os_window()
+        oswid = boss.add_os_window(wclass=opts.os_window_class, wname=opts.os_window_name)
         tm = boss.os_window_map[oswid]
         tab = tm.new_tab(empty_tab=True)
         if opts.tab_title: