[Distutils] setup_requires for dev environments

[Donald Stufft]

> On Mar 17, 2015, at 8:33 AM, Paul Moore <p.f.moore at gmail.com> wrote:
> 
> On 17 March 2015 at 11:49, Donald Stufft <donald at stufft.io> wrote:
>>> I'm still not clear what you expect pip to *do* with the metadata.
>>> It's just data, there's no functionality specified in the PEP.
>> 
>> What pip does now with metadata, Look at it for dependency information when
>> installing the Wheel, show it when doing ``pip show``, handle the Provides
>> metadata making something “Provide” something else, show warnings for the
>> obsoleted-by metadata, handle extensions (including failing if there is a
>> critical extension we don’t understand).
> 
> Hmm, OK.
> 
> At the moment that stuff (except pip show) is all covered by the
> running of the egg_info command, I guess. So you're saying that pip
> should first check if a requirement has new-style metadata and if it
> does, skip the egg_info command and use pydist.json. I guess that
> would be good - it'd solve the problems we see with numpy-related
> packages that need things installed just to run setup.py egg_info.
> 
> It wasn't something I'd particularly considered, but thanks for the
> clarification.
> 
> Paul

There is no egg_info command inside of a Wheel, it’s currently looking
at foo.whl/foo.dist-info/METADATA for that.

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

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