[ At Miro's request, resending this to python-devel so the discussion can be public ]
Hi Miro -
When rebuilding a package to
include in a Flatpak, we want to install *everything* under prefix=/app -
that includes Python modules. (Paths will be adjusted properly when
running the Flatpak.)
For years, the way we did that is by installing a /usr/lib64/python3.10/distutils/distutils.cfg:
===
[install]
prefix=/app
===
This is part of the flatpak-rpm-macros package that gets installed in the buildroot for Flatpak rebuilds
In
Fedora 36, this no longer works for 'pip install' - it seems that pip
unconditionally uses 'sysconfig' rather than 'distutils' to determine
install paths for Python >= 3.10.
I see that you filed
https://github.com/pypa/pip/issues/10647
which landed in pip for pip-22, but Fedora 36 / pip-21 this isn't
present? And in any case, that seems like it's something for 'sudo pip
install' rather than package installation. I actually don't really
follow how the Python macros are getting things installed into /usr/lib
rather than /usr/local/lib.
Any advice about how we can make the installation into /app work? Hopefully in a future-proof way...
Thanks!!!
Owen