[gentoo-python] [PATCHES] Use pydistutils.cfg to pass build-dir

[Michał Górny]

Currently, we're passing build-dir and stuff implicitly in esetup.py.
We're appending the 'build' and 'egg-info' commands which is confusing
and not always requested.

These patches use different approach for setting build-dir. We create
a per-implementation $HOME, and create .pydistutils.cfg there. This way,
we can set all the build-dirs without explicitly invoking any of
the commands.

Notes:

1. esetup.py no longer explicitly invokes 'build' and 'egg-info' -- can
be used more widely.

2. if esetup.py is called before python_compile(), it doesn't have
build-dir set yet. AFAICS this is not an issue but still worth noticing.

3. if some ebuild relied on 'esetup.py' implicitly appending 'build'
command, it needs to be fixed :).

4. implicit 'build' caused implicit rebuild in python_install() for
a few packages. That should be fixed now.

5. if some package overrides build dirs in setup.cfg, it will override
our setting. We need to see if that's a case somewhere and if it causes
trouble.

That's all I can think of. What do you think?

--
Best regards,
Michał Górny