Re: [gentoo-python] 'Converted' Python script suffixes vs EPYTHON

[Ben de Groot]

On 6 October 2012 04:05, Michał Górny <mgorny@g.o> wrote:
> Hello,
>
> As you may know, distutils-r1 (much like python.eclass & p-d-ng)
> holds separate ('converted') copies of Python scripts for each
> implementation. And much like python.eclass, it will use a wrapper
> program to choose the 'default' script version respecting
> eselect-python.
>
> So, if dev-python/foo installs /usr/bin/foo, the following will be
> installed:
>
> - /usr/bin/foo-pypy1_8
> - /usr/bin/foo-python2_6
> - /usr/bin/foo-python2_7
> - /usr/bin/foo-jython2_5
>                ^^^^^^^^^
> - /usr/bin/foo -> py-exec
>
> I have allowed myself to highlight the implementation suffixes in
> scripts. These are suffixes used by p-d-ng, and they are the same as
> implementation names used in PYTHON_TARGETS.
>
> python.eclass used instead:
> - /usr/bin/foo-2.7-pypy-1.8 (yes, seriously)
> - /usr/bin/foo-2.6
> - /usr/bin/foo-2.7
> - /usr/bin/foo-2.5-jython
>
> which are completely custom. Now, Gentoo's EPYTHON variable instead
> contains Python executable names which are (for those suffixes):
> - pypy-c1.8
> - python2.6
> - python2.7
> - jython2.5
>
> Now, I'm wondering what to do in order for the wrapper (py-exec)
> to be optimal and compliant with Gentoo's EPYTHON (and thus
> eselect-python).
>
>
> 1/ Use current python-distutils-ng names.
>
> Adv:
> - same values as in PYTHON_TARGETS,
> - converting the ~25 ebuilds wouldn't change names.
> Disadv:
> - starting every python app through 'foo' would require converting
>   the EPYTHON value to PYTHON_TARGETS,
> - python wrapper would have to have conversion tables hardcoded (and I
>   really dislike doing this).
>
>
> 2/ Change suffixes to match $EPYTHON.
>
> Adv:
> - makes the wrapper really simple,
> - more 'compliance' with python.eclass.
> Disadv:
> - the EPYTHON name for pypy is 'pypy-c', so it'd be 'foo-pypy-c1.8'.
>
>
> Any other ideas? Thoughts?
>
> You can take a look at current wrapper code (it's called
> python-wrapper-r1, I will rename it later)[1] but note that's
> a partial solution and the actual one will be either more complex
> (if 1/) or simpler (if 2/).
>
> [1]:https://bitbucket.org/mgorny/python-wrapper-r1/src/master/src/python-wrapper.c
>
> --
> Best regards,
> Michał Górny

I vote for simple = 2.

-- 
Cheers,

Ben | yngwin
Gentoo developer
Gentoo Qt project lead, Gentoo Wiki admin