bug#45018: [PATCH v2 0/6] Process and connection reuse for substitutions

[Ludovic Courtès]

Ludovic Courtès <ludo@gnu.org> skribis:

>   daemon: 'Agent' constructor takes a list of environment variables.
>   daemon: Use 'Agent' to spawn 'guix substitute --query'.
>   daemon: Factorize substituter agent spawning.
>   daemon: Run 'guix substitute --substitute' as an agent.
>   substitute: Cache and reuse connections while substituting.
>   daemon: Raise an error if substituter doesn't send the expected hash.

Pushed as bfe4cdf88ee3e88910d22291a4c745462f2d6417, followed by an
update of the ‘guix’ package.

Ludo’.