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Re: [libvirt] libvirt-python RPM installation not recognized by pip



On Mon, May 15, 2017 at 07:35:30AM -0400, Cleber Rosa wrote:
Hello,

When using the standard "requirements.txt" files for installation
package dependencies, I noticed that "libvirt-python" would attempt to
be installed by "pip" even when the equivalent RPM package is already
installed.

For instance, on a Fedora 25 system:

 $ rpm -q libvirt-python
 libvirt-python-2.2.0-1.fc25.x86_64
 $ python -e 'import pkg_resources;
pkg_resources.get_distribution("libvirt-python")'
 ...
pkg_resources.DistributionNotFound: The 'libvirt-python' distribution
was not found and is required by the application

The provider (the actual module) is actually present, but (rightfully
so) under the name "libvirt":

 $ python -c 'import pkg_resources; print
pkg_resources.get_provider("libvirt")'
<pkg_resources.DefaultProvider instance at 0x7fdfbc67a488>

At first sight, this seems to be caused by the lack of an "egg-info"
file, such as:

$PYTHON_SITE_PACKAGES/libvirt_python-2.2.0-py2.7.egg-info

I'm reporting a supposedly packaging issue here since the libvirt-python
setup.py file itself includes support for a custom rpm command.

Please advise if any of this is intentional, and/or whether this should
indeed be reported here or on downstream only.


On non-rpm system, I have that file and it works properly:

 $ ls /usr/lib64/python*/site-packages/libvirt_python-3.2.0-py*.egg-info
 /usr/lib64/python2.7/site-packages/libvirt_python-3.2.0-py2.7.egg-info
 /usr/lib64/python3.4/site-packages/libvirt_python-3.2.0-py3.4.egg-info

 $ pip install --user libvirt-python
 Requirement already satisfied: libvirt-python in /usr/lib64/python3.4/site-packages

Looks like this _might_ be related to the %install script in libvirt-python.spec.in:

 rm -f %{buildroot}%{_libdir}/python*/site-packages/*egg-info

So it should be included instead, I guess.  Cc'ing the original author
for confirmation that it was not intentional.

Thanks for reporting that.

Regards,

--
Cleber Rosa
[ Sr Software Engineer - Virtualization Team - Red Hat ]
[ Avocado Test Framework - avocado-framework.github.io ]
[  7ABB 96EB 8B46 B94D 5E0F  E9BB 657E 8D33 A5F2 09F3  ]





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