python build_tools/update_deps.py fails when the default locale is cp932 and dotnet tool shows messages in Japanese

[yukawa]

Description

python build_tools/update_deps.py fails when the default locale is cp932 and dotnet tool shows messages in Japanese.

Rrerequisite

• dotnet tool --help shows messages in Japanese
• python -c "import locale; print(locale.getpreferredencoding())" shows cp932

Steps to reproduce

Steps to reproduce the behavior:

1. git clone https://github.com/google/mozc.git
2. cd mozc
3. python build_tools/update_deps.py

Expected behavior

At the step 3, the command succeeds.

Actual behavior

At the step 3, the command fails with the following error.

PS D:\mozc\src> python build_tools/update_deps.py
Traceback (most recent call last):
  File "D:\mozc\src\build_tools\update_deps.py", line 499, in <module>
    main()
    ~~~~^^
  File "D:\mozc\src\build_tools\update_deps.py", line 485, in main
    restore_dotnet_tools(args.dryrun)
    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "D:\mozc\src\build_tools\update_deps.py", line 443, in restore_dotnet_tools
    exec_command(args, cwd=ABS_MOZC_SRC_DIR)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\mozc\src\build_tools\update_deps.py", line 427, in exec_command
    _, _ = process.communicate()
           ~~~~~~~~~~~~~~~~~~~^^
  File "C:\Users\testuser\AppData\Local\Programs\Python\Python313\Lib\subprocess.py", line 1206, in communicate
    stdout = self.stdout.read()
UnicodeDecodeError: 'cp932' codec can't decode byte 0x84 in position 2: illegal multibyte sequence

Screenshots

Version or commit-id

14afac9

Environment

• OS: Windows 24H2

Additional context

We can fix the issue by adding encoding='utf-8' here.

mozc/src/build_tools/update_deps.py

Lines 408 to 414 in 14afac9

	process = subprocess.Popen(
	args,
	cwd=cwd,
	shell=False,
	stdout=subprocess.PIPE,
	text=True,
	)