Hey everybody!
Some of you may have noticed RPMs called `platform-python-foo` on your
Fedora 27, and even others may have noticed that these have recently
been removed from rawhide. This is expected, read on if you'd like to
know more.
Fedora 27
The `platform-python-*` RPMs are part of a F27 [Fedora Change] called
the Platform Python Stack. This change was aimed primarily to support
the F27 Modular Server release, specifically to create a completely
separate Python stack that would be parallelly installable with Python
from the `python3` module. This Platform-Python stack was needed to run
DNF that lived in the Platform module, so that Fedora would continue
working even when no modules were installed. The change was also
deployed to mainline Fedora so that DNF would not behave differently on
the two platforms.
In the end, however, the change was not successful. To make the
Platform-Python stack completely separate, its files had to be forced to
non-standard locations which, among other things, created enormous
problems when trying to build C extensions for it. On top of this,
Platform turned out to house many more Python tools and building all the
Python dependencies for them was just too costly in this manner. F27
Modular Server therefore ended up shipping the normal Python 3 stack in
the Platform module, and `platform-python-*` packages were made obsolete
in rawhide. Though they are not actually used for anything, the packages
shall remain in F27 as it would be risky (and probably impossible) to
remove them from a live release.
[Fedora Change] https://fedoraproject.org/wiki/Changes/Platform_Python_Stack
Future
The need for a Python stack in the Platform is still there, however, and
thus we'll need to revise Platform-Python for F28. Currently we're
trying to make the Platform-Python and the modular Python stacks share
one internal implementation behind the scenes, eliminating the need for
a costly new independent stack that has to be maintained separately and
in non-standard paths. We'd like to post our current plan to
python-devel ML soon.
All the best,
Tomas Orsava
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