Re: [gentoo-dev] [PATCHES] python-r1 suite clean up & impl reorder

[Michał Górny]

On Mon, 7 Dec 2015 15:36:30 -0500
Mike Gilbert <floppym@g.o> wrote:

> On Sun, Dec 6, 2015 at 2:03 PM, Michał Górny <mgorny@g.o> wrote:
> > Hi,
> >
> > Here's another patchset. Mostly fixups inspired by multilib-build.eclass
> > changes with a few little additions.
> >
> > Changes:
> >
> > 1. eclass-set variables are now read-only,
>
> Sounds ok, but might break some ebuilds.
>
> > 2. 'unset -f' is used to unset temporary & local functions,
> > 3. implementations are reordered for sane order.
> >
> > I've tested this with a few dozen random distutils-r1, python-r1,
> > python-any-r1 and python-single-r1 packages. However, for
> > the implementation reorder a larger tinderbox run would be appreciated.
> >
> > As explained in the commit, the reorder may influence files installed by
> > a package, and implementation selected by python_setup(). This should
> > not cause issues for correctly written ebuilds, and should help us find
> > those that are not correctly written ;-).
> >
> > In other words, we're finally considering Python 3.x preferred over
> > Python 2.x.
>
> That could be a significant change, and I do expect that this will
> break some ebuilds.
>
> Any easy way to test this first? Or should we just be ready for the bug reports?

Not an easy. We could try some tinderboxing with USE='doc python'. Or
just grep ebuilds for python_export_best calls and plain python_setup
calls, and see if someone didn't assume it will always prefer python2.
REQUIRED_USE with python_gen_useflags may be a suggestion too.

So I'd go for waiting for bug reports. Or maybe doing the change
conditionally to EAPI 6 for improved confusion ;-).

-- 
Best regards,
Michał Górny
<http://dev.gentoo.org/~mgorny/>