unicode encoding error in windows

まず、MinGW または GitBash 環境でパッケージ化された CLI の失敗を再現し、localstack/cli/localstack.py の print_version 周辺を調査します。そこでは traceback が Rich 出力に到達します。その動作を PowerShell と比較し、CLI が cp1252 UnicodeEncodeError なしで正常に起動することを確認します。

when running the packaged CLI for windows, i get the following errors, which blocks the startup in the cockpit app https://github.com/localstack/localstack-desktop (where the same error is thrown when executing using spawn in a node process). i can reproduce it in a MinGW environment like GitBash

thomas@DESKTOP-HDNUHFQ MINGW64 ~
$ ./AppData/Local/Programs/localstack-cockpit/resources/vendor/win32/localstack-packaged-cli/localstack.exe start
Traceback (most recent call last):
  File "main.py", line 6, in <module>
  File "localstack\cli\main.py", line 6, in main
  File "localstack\cli\plugin.py", line 15, in __call__
  File "click\core.py", line 1128, in __call__
  File "click\core.py", line 1053, in main
  File "click\core.py", line 1659, in invoke
  File "click\core.py", line 1395, in invoke
  File "click\core.py", line 754, in invoke
  File "localstack\cli\localstack.py", line 122, in cmd_start
  File "localstack\cli\localstack.py", line 435, in print_version
  File "rich\console.py", line 1637, in print
  File "rich\console.py", line 837, in __exit__
  File "rich\console.py", line 795, in _exit_buffer
  File "rich\console.py", line 1927, in _check_buffer
  File "encodings\cp1252.py", line 19, in encode
UnicodeEncodeError: 'charmap' codec can't encode character '\U0001f4bb' in position 1: character maps to <undefined>
*** You may need to add PYTHONIOENCODING=utf-8 to your environment ***
[13272] Failed to execute script 'main' due to unhandled exception!

     __                     _______ __             __
    / /   ____  _________ _/ / ___// /_____ ______/ /__
   / /   / __ \/ ___/ __ `/ /\__ \/ __/ __ `/ ___/ //_/
  / /___/ /_/ / /__/ /_/ / /___/ / /_/ /_/ / /__/ ,<
 /_____/\____/\___/\__,_/_//____/\__/\__,_/\___/_/|_|

some observations:

• it works using powershell
• cp1252 refers to windows encoding: https://en.wikipedia.org/wiki/Windows-1252
• this is not related to the locale configuration

thomas@DESKTOP-HDNUHFQ MINGW64 ~
$ locale
LANG=en_US.utf8
LC_CTYPE="en_US.utf8"
LC_NUMERIC="en_US.utf8"
LC_TIME="en_US.utf8"
LC_COLLATE="en_US.utf8"
LC_MONETARY="en_US.utf8"
LC_MESSAGES="en_US.utf8"
LC_ALL=en_US.utf8