fixup: kconfiglib exception on vscode terminal

For the vscode terminal on remote server,
there is a chance that the client language
is not identical to server. And this will
cause the language required is not
supported by server environment. Finally,
we will see an exception occurred with
kconfiglib.

See RT-Thread/rt-thread#8843.

Author: polarvid

cmds/cmd_menuconfig.py

@@ -172,6 +172,18 @@ def mk_rtconfig(filename):
     rtconfig.close()
 
 
+# fix locale for kconfiglib
+def kconfiglib_fix_locale():
+    import os
+    import locale
+
+    # Get the list of supported locales
+    supported_locales = set(locale.locale_alias.keys())
+
+    # Check if LANG is set and its value is not in the supported locales
+    if 'LANG' in os.environ and os.environ['LANG'] not in supported_locales:
+        os.environ['LANG'] = 'C'
+
 def cmd(args):
     import menuconfig
     import defconfig
@@ -236,6 +248,7 @@ def cmd(args):
         defconfig.main()
     else:
         sys.argv = ['menuconfig', 'Kconfig']
+        kconfiglib_fix_locale()
         menuconfig._main()
 
     if os.path.isfile(".config"):