[Nix-dev] Separating free and non-free packages, again

[Nicolas Pierron]

Hi,

On Fri, Nov 20, 2009 at 20:13, Nicolas Pierron
<nicolas.b.pierron at gmail.com> wrote:
> On Fri, Nov 20, 2009 at 18:53, Eelco Dolstra <e.dolstra at tudelft.nl> wrote:
>> Nicolas Pierron wrote:
>>
>>> On Thu, Nov 19, 2009 at 14:20, Eelco Dolstra <e.dolstra at tudelft.nl> wrote:
>>>> A while back we had a discussion about separating free and non-free packages in
>>>> Nixpkgs.  The main motivation is that it allows people to make completely free
>>>> Nixpkgs / NixOS installations.  For instance, last week at the GNU Hackers
>>>> Meeting we discussed doing continuous integration builds of the various GNU
>>>> packages.  Obviously, you don't want an accidental dependency on a non-free
>>>> package in such builds.
>>>>
>>>> After talking with Ludovic at the GHM, we came up with the following plan:
>>>>
>>>> - Create a directory pkgs/non-free.
>>>
>>> This information seems to be redundant because the license should give
>>> you such information.  Such separation is similar as duplicating the
>>> license terms, first in the Nix expression, second in the directory.
>>
>> Yes.  However:
>>
>> - Currently most (free) packages lack a meta.license attribute.
>>
>> - We don't actually have a tool to check a dependency graph's meta.license
>> attributes yet.
>>
>> So it seems a lot simpler, especially in the short term, to move the few
>> non-free packages to a separate directory.
>
> So you just want a tool to retrieve meta.licence attributes for a
> specified derivation. Don't mind If I give it a try?

Done.

see nixpkgs/maintainers/scripts/dep-licenses.sh

-- 
Nicolas Pierron
http://www.linkedin.com/in/nicolasbpierron - http://nbp.name/
If you are doing something twice then you should try to do it once.