X2Go Bug report logs - #1059
pyhoca-gui can't be installed on OpenSUSE from project repository, OBS repository version throws errors

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Date: Thu, 14 Jul 2016 10:42:26 +0000
Message-ID: <20160714104226.Horde.2HEK4JCEizthWVzwY2V4Y43@mail.das-netzwerkteam.de>
From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Albrecht Kolthoff <kolthoff@gmx.net>, 1059@bugs.x2go.org
Subject: Re: [X2Go-Dev] Bug#1059: pyhoca-gui can't be installed on OpenSUSE
 from project repository, OBS repository version throws errors
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Control: tags -1 not-a-bug

On  So 10 Jul 2016 15:12:19 CEST, Albrecht Kolthoff wrote:

> Package: pyhoca-gui
> Version: 0.5.0.6-0.0
>
>
> While the x2goserver and x2goclient packages are running fine on my  
> machines (server: OpenSUSE Leap 42.1, client: OpenSUSE 13.2), the  
> pyhoca-gui package can't be installed from the x2go repository:
> http://packages.x2go.org/opensuse/13.2/main/x86_64/
>
> The same applies to the version in the heuler repository which  
> contains nightly builds, as far as I understand. In both cases the  
> package carries a dependency on python-wxWidgets-2_9 which can't be  
> fulfilled by the OpenSUSE repositories; these offer only the 3_0 and  
> alternatively the 2_8 packages.
>
> The OpenSUSE Build service version (which is some minor versions  
> behind the current ones on the x2go project server) actually has a  
> 3_0 dependency (instead of 2_9) and can be installed:
> http://download.opensuse.org/repositories/X11:/RemoteDesktop:/x2go/openSUSE_13.2/
>
> But: this version refuses to run. When started from a terminal  
> command line, it throws these errors:
>
> ak@tantalus:~> pyhoca-gui
> Traceback (most recent call last):
>   File "/usr/bin/pyhoca-gui", line 35, in <module>
>     from pyhoca.wxgui.launcher import PyHocaGUI_Launcher
>   File "/usr/lib/python2.7/site-packages/pyhoca/wxgui/launcher.py",  
> line 38, in <module>
>     from x2go import X2GOCLIENT_OS
>   File "/usr/lib/python2.7/site-packages/x2go/__init__.py", line  
> 189, in <module>
>     from defaults import X2GOCLIENT_OS
>   File "/usr/lib/python2.7/site-packages/x2go/defaults.py", line  
> 388, in <module>
>     RSAHostKey = paramiko.RSAKey.generate(RSAKEY_STRENGTH)
>   File "/usr/lib/python2.7/site-packages/paramiko/rsakey.py", line  
> 156, in generate
>     public_exponent=65537, key_size=bits, backend=default_backend()
>   File  
> "/usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 35, in  
> default_backend
>     _default_backend = MultiBackend(_available_backends())
>   File  
> "/usr/lib64/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 22, in  
> _available_backends
>     "cryptography.backends"
> AttributeError: 'EntryPoint' object has no attribute 'resolve'
>
> Which leads to the situation, that pyhoca-gui can't be run on  
> OpenSUSE at the moment. Which I regret.

This seems to be an issue buried in Python Paramiko and they way it is  
packaged for openSUSE. PyHoca-GUI relies on a working Paramiko Python  
module. What it does above is

  paramiko.RSAKey.generate(RSAKEY_STRENGTH)

And this call somehow fails. Please get this fixed for your distro and  
then pyhoca-gui will (hopefully) work.

Mike
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