bug#20255: 'search-paths' should respect both user and system profile.

[ludo@gnu.org (Ludovic Courtès)]

宋文武 <iyzsong@gmail.com> skribis:

>> [...]
>>>
>>> The idea to generate profile from search-paths is not new,
>>> I heard it from you IIRC.
>>> I think it's the time to do it.
>>
>> Agreed, the plan makes sense and I think we have all the bits.
>>
>> A related question is whether to encode search path environment
>> variables into the manifest (currently they are “guessed” by looking at
>> same-named packages; see (guix build package).)  I think that would
>> probably simplify things and make it easier to share this environment
>> variable code.
>>
>> Thoughts?
> I see, currently search-paths depends on the packages recipes. If we
> update the related scheme code, then search-paths got updated, even we
> didn't touch packages in profile at all.  It's a little confusing.
> So I think we should encode the search-paths for each package in
> manifest.

Done in dedb17a.

That will make it easier to generate environment variable settings.

Ludo’.