[oe] Python 2 and Python 3 module recipes

[Dominic Sacré]

Hi,

I'm trying to build a Python 3 application which depends on some modules
that are already packaged in OE for Python 2, but not for Python 3.
Since OE currently has virtually no Python 3 module recipes, this makes
me wonder what the best approach to create these recipes would be.

In most cases, I could just copy a Python 2 recipe, change the name from
"python-foo" to "python3-foo", and replace "inherit distutils" with
"inherit distutils3". However that would create a lot of duplication,
and might turn into a maintenance nightmare.

Do you have a suggestion what the right course of action would be? Move
most of the recipes' content to .inc files that can then be included by
both Python 2 and Python 3 recipes? Or maybe create a .bbclass that
would build both versions from the same recipe?
Is there any functionality already in place that would simplify this task?


Dominic