Re: 'guix build' and garbage collection

[ludo@gnu.org (Ludovic Courtès)]

Chris Marusich <cmmarusich@gmail.com> skribis:

> ludo@gnu.org (Ludovic Courtès) writes:
>
>> Hi!
>>
>> Chris Marusich <cmmarusich@gmail.com> skribis:
>>
>>> Do you know why the intensional model hasn't been deployed in the 11
>>> years since the thesis was published?  To learn more, I can think of a
>>> few places to look (Nix email lists, other Nix-related research papers),
>>> but if you have specific recommendations, it would be helpful!
>>
>> The intensional model (content-address item) works well if and only if
>> packages are 100% bit-reproducible, which they are not (yet!).
>>
>> Also I’m not sure how substitutes could work with this model since one
>> cannot refer to the build result until it’s available.
>
> FYI, section 6.4.4 (p. 157) of Eelco's thesis describes how substitution
> works in the intensional model.  When performing substitution for a
> store path p, if a trusted substitute for p has been registered, then it
> is tried, and the substitution is considered successful if and only if
> the output's content-addressed store path equals p.

Oh indeed, thanks for the reminder!

Ludo’.