Can a single recipe .bb file be used to generate both Python2 and Python3 packages?
Robert P. J. Day
Strange request earlier this week -- I was asked how *one* Python
recipe file could be used to generate both Python2 and Python3
packages to be installed in the final image.
I had never heard of such a thing, but the colleague asking this
was convinced she had seen this before somewhere (but couldn't
My immediate response was that the standard approach was to define
two recipe files -- say, python-fubar.bb and python3-fubar.bb --
where the entire difference was "inherit setuptools" in the former
and "inherit setuptools3" in the latter.
I mentioned that it used to be common to have just that, and for
both recipes to then include all the common content in the file
"python-fubar.inc" (I do see how a couple folks are cleaning all
that up since, if there is now only the Python3 version being
supported, it's pointless to still have a ".inc" file).
I asked if that is what she was thinking of, but she was adamant
that she remembers a single recipe .bb file that could do this.
Is there such a thing? I suspect one could hack something up,
but is such an approach considered standard? Or even doable?