[Distutils] setuptools 8 changes are great, but ...

[Donald Stufft]

> On Dec 15, 2014, at 6:46 PM, Maurits van Rees <m.van.rees at zestsoftware.nl> wrote:
> 
> Maurits van Rees schreef op 15-12-14 23:50:
>> TMP2/setuptools-8.0.4-py2.7.egg/pkg_resources.py:2425: RuntimeWarning:
>> 'zc.buildout-2.3.0 ()' is being parsed as a legacy, non PEP 440,
>> version. You may find odd behavior and sort order. In particular it will
>> be sorted as less than 0.0. It is recommend to migrate to PEP 440
>> compatible versions.
> 
> Actually, I have configured zc.buildout to use a download-cache directory where it saves downloaded zips/tarballs/eggs from PyPI. Buildout then adds this directory as a find-link and setuptools calls package_index.scan_url on it.  This prints the warnings, because it sees for example a file
> '/Users/mauritsvanrees/cached-downloads/dist/Acquisition-2.13.8.zip'
> This gets parsed as a Distribution with project_name 'Acquisition-2.13.8' and an empty version.
> 
> Ah, a demo with plain setuptools 0.8.4 is easy to setup:
> 
> $ mkdir bar
> $ touch bar/project-1.0.zip
> $ . bin/activate
> (venv) $ python
> Python 2.7.8 (default, Jul 28 2014, 10:41:45)
> [GCC 4.2.1 Compatible Apple LLVM 5.1 (clang-503.0.40)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from setuptools import package_index
> >>> pi = package_index.PackageIndex()
> >>> pi.add_find_links(['bar'])
> /Users/mauritsvanrees/tmp/venv/lib/python2.7/site-packages/pkg_resources.py:2425: RuntimeWarning: 'project-1.0 ()' is being parsed as a legacy, non PEP 440, version. You may find odd behavior and sort order. In particular it will be sorted as less than 0.0. It is recommend to migrate to PEP 440 compatible versions.
>  RuntimeWarning,
> >>>

Ah, this is probably an issue with how I detected a legacy version and how setuptools parses a filename. I can probably get rid of the warning spam.

---
Donald Stufft
PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA