Libguestfs - Oct 2022 - distutils use in hivex libdnet libnbd (and more) [was: Re: Help needed triaging build failures without distutils]

On Tue, Oct 18, 2022 at 10:53:12AM +0100, Richard W.M. Jones
wrote:
>   https://github.com/libguestfs/libguestfs/blob/master/m4/guestfs-python.m4
Actually some help for how to replace it would be useful too as
sysconfig is not an exact replacement for distutils.sysconfig.  In
particular get_python_lib doesn't exist, and I can't find an exact
replacement.

Original code:

  $ python3 -c 'import distutils.sysconfig;
print(distutils.sysconfig.get_python_lib(1,0));'
  /usr/lib64/python3.11/site-packages

Potential replacement:

  $ python3 -c 'import sysconfig;
print(sysconfig.get_path("platlib"));'
  /usr/local/lib64/python3.11/site-packages

Maybe the original code was wrong, but I guess we don't want to
install site packages in /usr/local when running under RPM at least.
Note it's used here:

https://github.com/libguestfs/libguestfs/blob/master/python/Makefile.am#L50-L54

(We do not -- and cannot -- use ordinary Python install mechanisms.)

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
nbdkit - Flexible, fast NBD server with plugins
https://gitlab.com/nbdkit/nbdkit

[Sending 2nd email again since it didn't reach the Python-devel list first
time]

On Tue, Oct 18, 2022 at 11:13:47AM +0100, Richard W.M. Jones
wrote:
> On Tue, Oct 18, 2022 at 10:53:12AM +0100, Richard W.M. Jones wrote:
> >  
https://github.com/libguestfs/libguestfs/blob/master/m4/guestfs-python.m4
> 
> Actually some help for how to replace it would be useful too as
> sysconfig is not an exact replacement for distutils.sysconfig.  In
> particular get_python_lib doesn't exist, and I can't find an exact
> replacement.
> 
> Original code:
> 
>   $ python3 -c 'import distutils.sysconfig;
print(distutils.sysconfig.get_python_lib(1,0));'
>   /usr/lib64/python3.11/site-packages
> 
> Potential replacement:
> 
>   $ python3 -c 'import sysconfig;
print(sysconfig.get_path("platlib"));'
>   /usr/local/lib64/python3.11/site-packages
> 
> Maybe the original code was wrong, but I guess we don't want to
> install site packages in /usr/local when running under RPM at least.
> Note it's used here:
> 
>
https://github.com/libguestfs/libguestfs/blob/master/python/Makefile.am#L50-L54
> 
> (We do not -- and cannot -- use ordinary Python install mechanisms.)
> 
> Rich.
> 
> -- 
> Richard Jones, Virtualization Group, Red Hat
http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> nbdkit - Flexible, fast NBD server with plugins
> https://gitlab.com/nbdkit/nbdkit
-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v