GNU bug report logs - #24450
pypi importer outputs strange character series in optional dependency case.

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Ricardo Wurmus <ricardo.wurmus <at> mdc-berlin.de>
Cc: 24450 <at> debbugs.gnu.org
Subject: bug#24450: [PATCHv2] Re: pypi importer outputs strange character series in optional dependency case.
Date: Sun, 16 Jun 2019 15:05:27 +0900

Hi again,

Ricardo Wurmus <ricardo.wurmus <at> mdc-berlin.de> writes:

> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> writes:
>
>> While I agree that a regexp is a bigger hammer than basic string
>> manipulation, I see some merit to it here:
>>
>> 1) We can be assured of conformance with upstream, again, per PEP-0508.
>> 2) It is easier to extend; we might want to add parsing for the version
>> spec in order to disregard dependencies specified for Python < 3, for
>> example.
>>
>> The use of the PEP-0508 grammar to define the regexp is useful to detail
>> in a more human-friendly language the components of the regexp.  We
>> could have otherwise used the more cryptic regexp for Python
>> distribution names:
>>
>> --8<---------------cut here---------------start------------->8---
>> ^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$
>> --8<---------------cut here---------------end--------------->8---
>>
>> So I guess that what I'm saying is that I prefer this approach to using
>> string-index with invalid characters, for the reasons above.
>>
>> [0]  https://www.python.org/dev/peps/pep-0508/
>
> Okay, sounds good.  Please make sure to note this in a comment, so that
> I won’t be asking myself this same question in a year :)

Done!

Maxim

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