'ë' in author name raise an error during poetry install

[raphaelyancey]

• I am on the latest Poetry version.

• I have searched the issues of this repo and believe that this is not a duplicate.

• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: -

• Poetry version: 1.0.3

• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/raphaelyancey/3d6ffeaddb75d5a96c173bab51e3688c

Issue

$ poetry install -v

Using virtualenv: /Users/raphael/Library/Caches/pypoetry/virtualenvs/pyky040-oonWdb9N-py3.7
Installing dependencies from lock file

No dependencies to install or update

  - Skipping zipp (1.1.0) Already installed
  - Skipping importlib-metadata (1.5.0) Already installed
  - Skipping pyparsing (2.4.6) Already installed
  - Skipping six (1.14.0) Already installed
  - Skipping atomicwrites (1.3.0) Already installed
  - Skipping attrs (19.3.0) Already installed
  - Skipping colorama (0.4.3) Not needed for the current environment
  - Skipping more-itertools (8.2.0) Already installed
  - Skipping packaging (20.1) Already installed
  - Skipping pluggy (0.13.1) Already installed
  - Skipping py (1.8.1) Already installed
  - Skipping wcwidth (0.1.8) Already installed
  - Skipping pytest (4.6.9) Already installed
  - Not removing pathlib2 (2.3.5) Not currently installed

[AttributeError]
'NoneType' object has no attribute 'group'

Traceback (most recent call last):
  File "/Users/raphael/.poetry/lib/poetry/_vendor/py3.7/clikit/console_application.py", line 131, in run
    status_code = command.handle(parsed_args, io)
  File "/Users/raphael/.poetry/lib/poetry/_vendor/py3.7/clikit/api/command/command.py", line 120, in handle
    status_code = self._do_handle(args, io)
  File "/Users/raphael/.poetry/lib/poetry/_vendor/py3.7/clikit/api/command/command.py", line 171, in _do_handle
    return getattr(handler, handler_method)(args, io, self)
  File "/Users/raphael/.poetry/lib/poetry/_vendor/py3.7/cleo/commands/command.py", line 92, in wrap_handle
    return self.handle()
  File "/Users/raphael/.poetry/lib/poetry/console/commands/install.py", line 72, in handle
    builder = EditableBuilder(self.poetry, self._env, NullIO())
  File "/Users/raphael/.poetry/lib/poetry/masonry/builders/builder.py", line 70, in __init__
    self._meta = Metadata.from_package(self._package)
  File "/Users/raphael/.poetry/lib/poetry/masonry/metadata.py", line 54, in from_package
    meta.author = package.author_name
  File "/Users/raphael/.poetry/lib/poetry/packages/package.py", line 137, in author_name
    return self._get_author()['name']
  File "/Users/raphael/.poetry/lib/poetry/packages/package.py", line 165, in _get_author
    name = m.group('name')

The error is gone when I replace ë by e in my name in pyproject.toml.

[raphaelyancey]

Minimal example:

In [1]: import re

In [2]: AUTHOR_REGEX = re.compile(r"(?u)^(?P<name>[- .,\w\d'’\"()]+)(?: <(?P<email>.+?)>)?$")

In [3]: r = "Raphaël Yancey <raphael@badfile.net>"

In [4]: s = "Sébastien Eustace <sebastien@eustace.io>"

In [5]: AUTHOR_REGEX.match(r).group("name")
AttributeError: 'NoneType' object has no attribute 'group'

In [6]: AUTHOR_REGEX.match(s).group("name")
Out[6]: 'Sébastien Eustace'

So this might be not on poetry but rather on re behavior (re.LOCALE / re.UNICODE maybe?). Will make further tests later.

[github-actions]

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