python-pygpu depends on non-existent python-cg

[Djassper]

python-pygpu is reported uninstallable by apt under my ubuntu 9.04 system
a dependency to defective paquet python-cg seems to be the reason

fred@skeptik ~ % uname -a
Linux skeptik 2.6.28-14-generic #47-Ubuntu SMP Sat Jul 25 01:19:55 UTC 2009 x86_64 GNU/Linux

fred@skeptik ~ % sudo apt-get install python-pygpu
Lecture des listes de paquets... Fait
Construction de l'arbre des dépendances
Lecture des informations d'état... Fait
Certains paquets ne peuvent être installés. Ceci peut signifier
que vous avez demandé l'impossible, ou bien, si vous utilisez
la distribution unstable, que certains paquets n'ont pas encore
été créés ou ne sont pas sortis d'Incoming.
L'information suivante devrait vous aider à résoudre la situation :

Les paquets suivants contiennent des dépendances non satisfaites :
  python-pygpu: Dépend: python-cg mais il n'est pas installable
E: Paquets défectueux

[Steve Beattie (sbeattie)]

The following packages have unmet dependencies:
  python-pygpu: Depends: python-cg but it is not installable
E: Broken packages

We do not have python-cg in our archive, though debian does in contrib http://packages.debian.org/search?searchon=names&keywords=python-cg

[Steve Langasek (vorlon)]

Steve, what action are you requesting us (ubuntu-archve) to take here? Syncing python-cg or removing python-pygpu?

(Either way, I think this needs an ack from an uploader; subscribing ubuntu-universe-sponsors)

[Steve Beattie (sbeattie)]

I don't have a strong opinion whether to sync python-cg from debian-contrib or python-pygpu should be pulled. We do already have nvidia-cg-toolkit in multiverse, so that dependency of python-cg should not be an issue. All I know is that there's not much point to having an uninstallable package in the archive, so it ought to be fixed one way or the other.

Is it documented anywhere why python-cg hasn't been synced from debian previously? Is it documented anywhere why we pulled python-pygpu? Shouldn't whatever process that pulled in python-pygpu from debian have ensured that it's dependencies were satisfiable initially?

[Fabrice Coutadeur (fabricesp)]

Hi,

The problem is not with python-cg binary package not been synced. The problem is that pycg FTBFS, as you can see there:
https://edge.launchpad.net/ubuntu/+source/pycg/0.14.1-2/+build/1079256/+files/buildlog_ubuntu-karmic-i386.pycg_0.14.1-2_FAILEDTOBUILD.txt.gz

This because nvidia-cg-toolkit is en 'empty' package that download the tarball at installation time, but Ubuntu buildd do not have internet access.

So the steps to follow as a workaround for this bug are:
- download the source package of pycg (apt-get source pycg),
- build it locally (debuild -b),
- and install the locally built package.
This way you will be able to install python-pygpu.

For the moment, I will unsubscribe u-u-s, as there is nothing to sponsor. Feel free to subscribe again u-u-s when a clear action is required.

thanks,
Fabrice