LaunchSettingsBase: Use shlex.split validate the pre-launch command

rare/commands/launcher/__init__.py

@@ -1,5 +1,6 @@
 import json
 import platform
+import shlex
 import subprocess
 import time
 import traceback
@@ -76,7 +77,7 @@ class PreLaunchThread(QRunnable):
             proc = get_configured_process()
             proc.setProcessEnvironment(launch_args.environment)
             self.signals.started_pre_launch_command.emit()
-            pre_launch_command = launch_args.pre_launch_command.split()
+            pre_launch_command = shlex.split(launch_args.pre_launch_command)
             # self.logger.debug("Executing prelaunch command %s, %s", pre_launch_command[0], pre_launch_command[1:])
             proc.start(pre_launch_command[0], pre_launch_command[1:])
             if launch_args.pre_launch_wait:

rare/components/tabs/settings/widgets/launch.py

@@ -1,4 +1,5 @@
 import os
+import shlex
 import shutil
 from typing import Tuple, Type, TypeVar
 
@@ -73,7 +74,11 @@ class LaunchSettingsBase(QGroupBox):
     def __prelaunch_edit_callback(text: str) -> Tuple[bool, str, int]:
         if not text.strip():
             return True, text, IndicatorReasonsCommon.VALID
-        if not os.path.isfile(text.split()[0]) and not shutil.which(text.split()[0]):
+        try:
+            command = shlex.split(text)[0]
+        except ValueError:
+            return False, text, IndicatorReasonsCommon.WRONG_FORMAT
+        if not os.path.isfile(command) and not shutil.which(command):
             return False, text, IndicatorReasonsCommon.FILE_NOT_EXISTS
         else:
             return True, text, IndicatorReasonsCommon.VALID