[Distutils] formencode as .egg in Debian ??

Josselin Mouette joss at debian.org
Fri Nov 25 13:52:26 CET 2005

Le vendredi 25 novembre 2005 à 11:54 +0100, Vincenzo Di Massa a écrit :
> Alle 11:04, venerdì 25 novembre 2005, David Arnold ha scritto:
> > But, if compatible versions of those dependencies are already installed
> > as Debian packages *without* egg metadata, will these be ignored?
> Yes, they will.


> > Even if it was possible for Debian to extend this downloading mechanism
> > so that it looked for dependencies via apt-get before trying to install
> > from the raw source or egg or whatever, it would usually be the case
> > that the user running the newly downloaded Python application would not
> > have permission to install system packages.
> I think easy_install coud be patched by debian packagers (or made configurable 
> by Phillip) to add a further check on dependency checking: it could check if a 
> dependency is already provided by system packages.

It could do it by simply trying to import the module.

> easy_install (and pkg_resources.require()) could have a config file telling 
> what code execute to test for dependencies, configurable in a way that when I 
> require foo-1.2.3 it can:
> 1) optionally check if apt (or urpmi or anything else) can provide that 
> depenedency and, if apt has them, promt the user to either:
>      1.1) run apt-get as root
>      1.2) skip this step ( 1) ) and go to directly to 2)

No. If the dependency is missing, this is a bug in the Debian package.
No more, no less.

Furthermore, it is a bad idea for a python script to mess up with the
packaging system. Not only querying it is very slow, but it implies to
make assumptions about the versioning scheme, that can become wrong at
any time.

> 2) check if it can find this dep like setuptools does today (installing them 
> as eggs somewhere in the user's home)

I consider this as a security risk. I hope this can be disabled by

 .''`.           Josselin Mouette        /\./\
: :' :           josselin.mouette at ens-lyon.org
`. `'                        joss at debian.org
   `-  Debian GNU/Linux -- The power of freedom

More information about the Distutils-SIG mailing list