From dec1203ea8d49fbc5bec739aabea35266db78a4b Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 10 May 2018 08:52:28 +0530
Subject: [PATCH] Make the kitty window id available as the environment
 variable KITTY_WINDOW_ID

Fixes #532
---
 kitty/state.c | 5 +++++
 kitty/tabs.py | 5 +++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/kitty/state.c b/kitty/state.c
index aa8367a31..a9f1caa4e 100644
--- a/kitty/state.c
+++ b/kitty/state.c
@@ -328,6 +328,10 @@ set_special_keys(PyObject *dict) {
     }}
 }
 
+PYWRAP0(next_window_id) {
+    return PyLong_FromUnsignedLongLong(global_state.window_id_counter + 1);
+}
+
 PYWRAP1(handle_for_window_id) {
     id_type os_window_id;
     PA("K", &os_window_id);
@@ -600,6 +604,7 @@ KK5I(add_borders_rect)
 
 static PyMethodDef module_methods[] = {
     MW(current_os_window, METH_NOARGS),
+    MW(next_window_id, METH_NOARGS),
     MW(set_options, METH_VARARGS),
     MW(set_in_sequence_mode, METH_O),
     MW(resolve_key_mods, METH_VARARGS),
diff --git a/kitty/tabs.py b/kitty/tabs.py
index eba648812..e227d9369 100644
--- a/kitty/tabs.py
+++ b/kitty/tabs.py
@@ -12,8 +12,8 @@ from .config import build_ansi_color_table
 from .constants import WindowGeometry, appname, get_boss, is_macos, is_wayland
 from .fast_data_types import (
     DECAWM, Screen, add_tab, glfw_post_empty_event, mark_tab_bar_dirty,
-    remove_tab, remove_window, set_active_tab, set_tab_bar_render_data,
-    swap_tabs, viewport_for_window, x11_window_id
+    next_window_id, remove_tab, remove_window, set_active_tab,
+    set_tab_bar_render_data, swap_tabs, viewport_for_window, x11_window_id
 )
 from .layout import Rect, all_layouts
 from .session import resolved_shell
@@ -167,6 +167,7 @@ class Tab:  # {{{
         fenv = {}
         if env:
             fenv.update(env)
+        fenv['KITTY_WINDOW_ID'] = str(next_window_id())
         if not is_macos and not is_wayland:
             try:
                 fenv['WINDOWID'] = str(x11_window_id(self.os_window_id))