GNU bug report logs - #36404
[PATCH 0/6] Add 'guix deploy'.

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From: Ludovic Courtès <ludo <at> gnu.org>
To: zerodaysfordays <at> sdf.lonestar.org (Jakob L. Kreuze)
Cc: Ricardo Wurmus <rekado <at> elephly.net>, Christopher Lemmer Webber <cwebber <at> dustycloud.org>, 36404 <at> debbugs.gnu.org
Subject: [bug#36404] [PATCH 2/3] machine: Reimplement 'managed-host-environment-type' deployment.
Date: Sun, 07 Jul 2019 00:13:45 +0200

zerodaysfordays <at> sdf.lonestar.org (Jakob L. Kreuze) skribis:

> +  (define (run-switch-to-system machine)
> +    "Monadic procedure serializing the items in MACHINE necessary to build a
> +G-Expression with 'switch-to-system'."
> +    (let* ((os (machine-system machine))
> +           (activation-script (operating-system-activation-script os)))
> +      (mlet %store-monad ((osdrv (operating-system-derivation os)))
> +        (machine-remote-eval machine
> +                             (switch-to-system osdrv activation-script)))))

Normally you should never need to call ‘operating-system-derivation’
because you can just insert an <operating-system> in a gexp and it’ll do
the right thing:

  #~(frob #$os)

Ludo’.

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