[Nix-dev] Re: New `buildPythonPackage' function

[Ludovic Courtès]

Hi Marc,

Marc Weber <marco-oweber at gmx.de> writes:

> Have a look at pkgs/development/interpreters/python-new/2.5/default.nix
> It looks like this :
>
>   soappy = t.pythonLibSetup.merge {
>     name = "soappy-0.12";
>     pyCheck = "from SOAPpy import WSDL";
>     [ .. ]
>   };
>
> It's a simple sanity check failing if the packages which the expression
> should provide can't be loaded.

The `buildPythonPackage' tries runs "python setup.py test" by default,
which in most cases runs a test suite.  It should be a good sanity
check.

> Why might this be benefical? Because if you add a lib depending on
> another it might do that import check in its configure script. And
> patching the configure scripts is ugly (IMHO)..

The easy_install(1) command does the right thing in that respect.  If it
cannot find a dependency, it tries to automatically download it from the
web, which simply fails in a Nix chroot.

Thanks,
Ludo'.