[Distutils] [Numpy-discussion] Proposal: stop supporting 'setup.py install'; start requiring 'pip install .' instead

[Paul Moore]

On 7 November 2015 at 22:47, Donald Stufft <donald at stufft.io> wrote:
> Only if we think we can trust the version numbers to be unique from random paths on the file system.

Precisely. And that's the sort of trade-off that Ralf was asking to be
clarified. Here, the trade off is that if we *are* allowed to rely on
the fact that name/version uniquely identifies the build, then we can
optimise build times via wheel cacheing. If we can't make that
assumption, we can't do the optimisation.

The request here seems to be that we provide the best of both worlds -
provide optimal builds *without* making the assumptions we use for the
"install a released version" case.
Paul