Re: Proposal: prefetch tarballs in a batch

[Ludovic Courtès]

Nikita Karetnikov <address@hidden> skribis:

>>> Is there a function that accepts a package name and returns a list of
>>> implicit inputs?
>
>> No, because by definition, those “implicit inputs” are not listed in the
>> package object.  Instead, they are added by the build system (see
>> build-system/gnu.scm.)
>
>> That’s why I suggested using derivations instead: take the output of
>> (package-derivation x y), and traverse it in search of fixed-output
>> derivations.
>
> What’s a fixed-ouput derivation?

A derivation whose result (hash thereof) is known in advance, as is the
case for downloads (info "(guix) Derivations").

Ludo’.