Re: Binary substituter

[Ludovic Courtès]

Hi!

address@hidden (Ludovic Courtès) skribis:

> This commit adds the ‘guix substitute-binary’ command, which is intended
> for use by the daemon, not by normal users.  So far, the daemon can
> invoke it to know which substitutes are available on hydra.gnu.org.  It
> cannot actually download them yet, but that should be done Real Soon, so
> stay tuned.  :-)

Commit fe0cff14f6c5facee4192529f5c7b7a972f185ca implements the long
awaited (at least by me) feature.  :-)

That is, when you run ‘guix build foo’ or ‘guix package -i foo’ the
daemon invokes ‘guix substitute-binary’ and asks it to fetch a pre-built
binary from hydra.gnu.org, unless you pass ‘--no-substitutes’.

I’m now using it to try to build stuff in the ‘core-updates’ branch
without having to spend CPU time on it.  Please report any problems you
may find!

Ludo’.