From 11194f339d0fe1a9fb522d466b0b80075f172e6a Mon Sep 17 00:00:00 2001
From: Gleb Mazovetskiy <glex.spb@gmail.com>
Date: Thu, 7 Jan 2021 19:24:16 +0000
Subject: [PATCH] game_launch: Add a --disable-menu-changegame build option

This option is useful when xash3d is launched externally by a script
that performs additional setup.
---
 game_launch/game.cpp | 9 ++++++++-
 game_launch/wscript  | 7 ++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/game_launch/game.cpp b/game_launch/game.cpp
index ca4c4de4..9ce8c262 100644
--- a/game_launch/game.cpp
+++ b/game_launch/game.cpp
@@ -129,9 +129,16 @@ static void Sys_ChangeGame( const char *progname )
 _inline int Sys_Start( void )
 {
 	int ret;
+	pfnChangeGame changeGame = NULL;
 
 	Sys_LoadEngine();
-	ret = Xash_Main( szArgc, szArgv, GAME_PATH, 0, Xash_Shutdown ? Sys_ChangeGame : NULL );
+
+#ifndef XASH_DISABLE_MENU_CHANGEGAME
+	if( Xash_Shutdown )
+		changeGame = Sys_ChangeGame;
+#endif
+
+	ret = Xash_Main( szArgc, szArgv, GAME_PATH, 0, changeGame );
 	Sys_UnloadEngine();
 
 	return ret;
diff --git a/game_launch/wscript b/game_launch/wscript
index 633be290..424d4ffc 100644
--- a/game_launch/wscript
+++ b/game_launch/wscript
@@ -9,12 +9,17 @@ import sys
 top = '.'
 
 def options(opt):
-	return
+	grp = opt.add_option_group('Game launcher options')
+
+	grp.add_option('--disable-menu-changegame', action = 'store_true', dest = 'DISABLE_MENU_CHANGEGAME', default = False,
+		help = 'disable changing the game from the menu [default: %default]')
 
 def configure(conf):
 	if conf.env.DEST_OS == 'win32':
 		conf.load('winres')
 
+	conf.define_cond('XASH_DISABLE_MENU_CHANGEGAME', conf.options.DISABLE_MENU_CHANGEGAME)
+
 def build(bld):
 	source = ['game.cpp']
 	includes = '. ../common ../public'