Fixing package-with-python2 (was: Package transformations)

[Thompson, David]

On Mon, Feb 1, 2016 at 8:06 AM, Efraim Flashner <efr...@flashner.co.il> wrote:

> I looked over the commit but not deeply enough yet, would it be possible to
> use some of the logic in this to fix the package-with-python2 issue?

Here's a potential solution for 'package-with-python2': module
introspection.  AIUI, the issue is that some Python 2 packages need
extra manual tweaking, but 'package-with-python2' creates package
variants without these tweaks. Our algorithm could look up
'python2-foo' in (gnu packages python) and use that package object, if
it exists.  This would stop the recursive transformation for that
branch of the dependency graph and allow us to tweak Python 2 variants
as needed without fear.

Also, somewhat unrelated, package-with-python2 could add setuptools as
an input to these packages so we can remove all the unnecessary usage
of it in Python 3 packages.

Thoughts?

- Dave