fix(utils.py): specify utf-8 encoding when reading file

[harumaki4649]

Summary

Fixed file reading error in utils.py by explicitly specifying UTF-8 encoding.

Details

• Added encoding="utf-8" to file open function
• Prevents errors on environments with different default encodings
• Ensures consistent behavior across platforms

Impact

• No functional changes except avoiding UnicodeDecodeError
• Safer and more predictable file reading

[sigmavirus24]

Can you provide an example of when this fails today and the complete traceback?

[harumaki4649]

Yes, this is an error that occurs in Japanese environments.
It's likely due to handling Japanese text.

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Program Files\Python311\Scripts\twine.exe\__main__.py", line 7, in <module>
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\__main__.py", line 33, in main
    error = cli.dispatch(sys.argv[1:])
            ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\cli.py", line 139, in dispatch
    return main(args.args)
           ^^^^^^^^^^^^^^^
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\commands\upload.py", line 250, in main
    upload_settings = settings.Settings.from_argparse(parsed_args)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\settings.py", line 288, in from_argparse
    return cls(**settings)
           ^^^^^^^^^^^^^^^
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\settings.py", line 116, in __init__
    self._handle_repository_options(
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\settings.py", line 304, in _handle_repository_options
    self.repository_config = utils.get_repository_from_config(
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\utils.py", line 154, in get_repository_from_config
    config = get_config(config_file)[repository]
             ^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\msi-z\AppData\Roaming\Python\Python311\site-packages\twine\utils.py", line 66, in get_config
    parser.read_file(f)
  File "C:\Program Files\Python311\Lib\configparser.py", line 734, in read_file
    self._read(f, source)
  File "C:\Program Files\Python311\Lib\configparser.py", line 1037, in _read
    for lineno, line in enumerate(fp, start=1):
UnicodeDecodeError: 'cp932' codec can't decode byte 0x88 in position 418: illegal multibyte sequence```

[harumaki4649]

I made minimal changes based on this error.
Specifically, I specified the encoding.
I believe utf-8 is optimal in most cases.

[harumaki4649]

Specifically, it is as follows.

This error happens in Windows Japanese environments where the default encoding is cp932.
By explicitly specifying UTF-8, we avoid platform-dependent behavior and ensure consistent handling of .pypirc.
UTF-8 has become the de-facto standard for configuration files, so I believe this change is safe and beneficial.