PyBuild available in raring

[Scott Kitterman]

On Friday, January 25, 2013 10:07:35 AM Barry Warsaw wrote:
> On Jan 25, 2013, at 02:45 PM, Colin Watson wrote:
> >On Fri, Jan 25, 2013 at 06:21:19PM +0400, Dmitry Shachnev wrote:
> >> I want to announce that my yesterday’s python3-defaults upload[1] made
> >> new “PyBuild” tool (developed by Piotr Ożarowski) available in raring.
> >> 
> >> It allows one to easily build packages for both Python 2 and Python 3
> >> (and also PyPy) by just passing `--buildsystem=pybuild` to debhelper
> >> commands, and is very configurable (it guesses supported interpreter
> >> versions by looking at Build-Depends).
> >
> >This looks like a big improvement, thanks.  However, is it intentional
> >that it appears to install Python 3 modules to
> >/usr/lib/python3.X/dist-packages/ by default, rather than
> >/usr/lib/python3/dist-packages/?
> 
> I haven't looked at the details yet, but I think this should be considered a
> bug.  As of Python 3.2, there are no collision problems with lumping all
> Python packages under the same shared location.  Even shared libraries
> won't collide.
> 
> There's one case where this might make sense though.  Say package `foo` is
> only compatible with Python 3.2 but hasn't yet been ported to 3.3.  In that
> case, it might make sense to install that under /u/l/python3.2/d-p instead
> of /u/l/python3/d-p.  This has come up before in discussions (with no
> wonderful solution btw), but I suspect that 1) it will be fairly rare; 2)
> since this is really a problem with upstream, effort is better spent
> getting upstream ported to all supported Python 3's.  Given Python's
> effectively 18 month release cycle, this hopefully won't come up very
> often.

There's another case as well.  If there is pure python code that is python3 
version specific.  This is rare, but exists.  To make sip4/python-qt4 support 
multiple python versions I had to do some really unfortunate and painful 
things to make it work.  It would be nice if we had a general solution for 
this.

Scott K