On Jul 25, 2013 12:13 AM, "Bohuslav Kabrda" <bkabrda@xxxxxxxxxx> wrote:
>
> ----- Original Message -----
> > Since Python upstream really cares about these things, I started a discussion
> > about this on their mailing list [1]. So far, it seems that people prefer my
> > mental model, but this is judging from just 4 answers, 2 of which mentioned
> > this. So let's wait and see.
> > BTW, if Python 2 and Python 3 were different languages, then IMO it wouldn't
> > make sense to point /usr/bin/python to Python 3, while upstream plans to
> > actually give the recommendation to do so sometime in the future.
> >
>
> So, judging from what upstream has recommended (and how they will modify pep 394), we should:
> - Mandate usage of /usr/bin/python2 and prohibit usage of /usr/bin/python (I think this can be done automatically in %__os_install_post, or somewhere similar) - we should probably do that ASAP
<nod>. Which means patching in a bunch of packages. For os_install_post modification you're talking about a check that fails the build if /usr/bin/python is used? I note that upstream envisions some cases where /usr/bin/python is correct but I don't recall any package where we'd have invoked that clause (the case is when the code will run on either python2 or on python3)
/me goes to the upstream thread to ask Nick what distutils/setuptools/etc do when they rewrite shebang lines.
> - Rename python to python2 and add "Provides: python" for the time being (the similar should probably be done for all python packages to keep things consistent) - we can do this for F21
Renaming other packages gets problematic. See the previous discussion on python-devel@xxxxxxxx.o that tomspur championed. (This was one of the items I was hoping could be discussed at flock) You wouldn't expect to report bugs for the python3-foo library against the python2-foo package for instance. One possibility that we talked about was to stop shipping python3 packages as subpackages of the python2 modules.
> - Somewhere in the future switch "Provides: python" to python3 stuff and possibly /usr/bin/python to point to python3, according to upstream recommendation (2015?) to keep consistent across multiple platforms as much as possible.
>
Rather than 2015 I'd tie it to when upstream switches the recommendation in pep 394.
-Toshio
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