[Python-Dev] Bilingual scripts (original) (raw)

Dirkjan Ochtman dirkjan at ochtman.nl
Fri May 24 22:52:43 CEST 2013

On Fri, May 24, 2013 at 10:23 PM, R. David Murray <rdmurray at bitdance.com> wrote:

Gentoo has a (fairly complex) driver script that is symlinked to all of these bin scripts. The system then has the concept of the "current python", which can be set to python2 or python3. The default bin then calls the current default interpreter. There are also xxx2 and xxx3 versions of each bin script, which call the 'current' version of python2 or python3, respectively.

I'm one of the Gentoo devs, on the python team. I haven't actually written any code for this, but I can show a little of what's going on. I think most of the code is actually in https://bitbucket.org/mgorny/python-exec. We then install three scripts:

lrwxrwxrwx 1 root root 11 May 20 14:06 /usr/bin/sphinx-build -> python-exec -rwxr-xr-x 1 root root 311 May 20 14:06 /usr/bin/sphinx-build-python2.7 -rwxr-xr-x 1 root root 311 May 20 14:06 /usr/bin/sphinx-build-python3.2

sphinx-build-python2.7 looks like this:

#!/usr/bin/python2.7

EASY-INSTALL-ENTRY-SCRIPT: 'Sphinx==1.1.3','console_scripts','sphinx-build'

requires = 'Sphinx==1.1.3' import sys from pkg_resources import load_entry_point

if name == 'main': sys.exit( load_entry_point('Sphinx==1.1.3', 'console_scripts', 'sphinx-build')() )

We now use a python2.7 suffix rather than just a 2.7 suffix because we will install separate wrappers for e.g. pypy1.9 (and we are also prepared to support jython or other implementations at some point).

If you have any more questions, I'll try to answer them; or, join #gentoo-python on Freenode, there are generally people hanging out there who know much more about our setup than I do.

Cheers,

Dirkjan

More information about the Python-Dev mailing list