[gentoo-python] Re: Minimal technical demo for alternate bindir scheme

[Mike Gilbert]

On Sat, Sep 7, 2013 at 4:44 AM, Michał Górny <mgorny@g.o> wrote:
> Hello, all.
>
> I've wrapped up a first patch to demonstrate the concept of keeping
> Python scripts outta bindir.
>
> Steps to do:
>
> 1. create /etc/env.d/NNpythonpath like:
>
> PATH="/usr/lib64/python3.3/bin:/usr/lib64/python3.2/bin:/usr/lib64/python2.7/bin:/usr/lib64/python2.6/bin:/usr/lib64/pypy2.0/bin"
>
> (this will be most likely done by eselect-python)
>
> 2. env-update, source /etc/profile
>
> 3. apply the attached patch to the eclasses
>
> TADAAM!
>
> Expect new levels of screwup. Things that definitely don't work:
>
> 1. python_scriptinto() since we install all the scripts to dedicated
> location. I have no idea how to support it without forking paths like
> crazy.
>
> 2. things that rely on /usr/bin path. We will need new wrappers for
> that. If we really want that.
>
> 3. systems with screwed up $PATH. That is, you won't find Python stuff
> if you don't have proper path in PATH :).
>
> 4. python_wrapper_setup() enforces only current impl in PATH. Remaining
> impls need to be provided by caller env. If they aren't, some deps with
> mis-matched impls may not work.
>
> Enjoy, test and comment.
>

I like it on the surface, although I am a little concerned about
relying on that PATH setting. I'm sure people will find ways to screw
that up (like running chroot without sourcing /etc/profile).

I'll give it a shot here.