Add debug config property "clientOS" to replace "WindowsClient" / "UnixClient" in "debugOptions".

Author: Pavel Minaev

src/debugpy/adapter/clients.py

@@ -263,19 +263,21 @@ def handle(self, request):
                 self._propagate_deferred_events()
                 return
 
-            if {"WindowsClient", "Windows"} & debug_options:
-                client_os_type = "WINDOWS"
+            if "clientOS" in request:
+                client_os = request("clientOS", json.enum("windows", "unix")).upper()
+            elif {"WindowsClient", "Windows"} & debug_options:
+                client_os = "WINDOWS"
             elif {"UnixClient", "UNIX"} & debug_options:
-                client_os_type = "UNIX"
+                client_os = "UNIX"
             else:
-                client_os_type = "WINDOWS" if sys.platform == "win32" else "UNIX"
+                client_os = "WINDOWS" if sys.platform == "win32" else "UNIX"
             self.server.channel.request(
                 "setDebuggerProperty",
                 {
                     "skipSuspendOnBreakpointException": ("BaseException",),
                     "skipPrintBreakpointException": ("NameError",),
                     "multiThreadsSingleNotification": True,
-                    "ideOS": client_os_type,
+                    "ideOS": client_os,
                 },
             )