[OE-core] "inherit setuptools" versus "inherit pypi" -- a python style question

[Anders Darander]

* Robert P. J. Day <rpjday at crashcourse.ca> [170302 12:33]:

> On Thu, 2 Mar 2017, Robert P. J. Day wrote:

> >   inherit pypi setuptools
> >   require python-psutil.inc

> > and the corresponding .inc file contains:

> >   RDEPENDS_${PN} += " \
> >     ${PYTHON_PN}-shell \
> >     ${PYTHON_PN}-subprocess \
> >     ${PYTHON_PN}-threading \
> >   "

> > so the first recipe inherits pypi, the second one inherits setuptools,
> > and the third inherits *both*. what is the *preferred* style?

Well, different purposes... If you take a look at pypi.bbclass, it's all
about how to retrieve the module (source code). setuptools.bbclass is
about how to install the module...

Ie retrieving and installing...

Cheers,
Anders

> >   i'm assuming that if a python module is availably via pypi, then
> > you'd go with that; otherwise, just use regular setuptools. and not
> > being a python guru, why does that third recipe need to inherit both?

> >   i did a quick grep of the current meta-python layer to see the
> > frequency of each, and got:

>   grrrrrr ... i just looked more closely and it appears that all of
> the "recipe" files under meta-python that inherit only pypi are all
> ".inc" files, being included by recipe files that first inherit
> setuptools. so, again, clarification on the proper way to do this
> would be nice.


-- 
Anders Darander, Senior System Architect
ChargeStorm AB / eStorm AB