From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Problems adding multiple file systems (e.g., /home partition)
Date: Tue, 29 Nov 2016 13:57:33 +0100
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In-Reply-To: <ae627b95-55c1-5731-4458-3e93ef04a75d@mac.com> (Daniel Drake's
	message of "Mon, 28 Nov 2016 13:23:27 -0500")
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To: Daniel Drake <silophophe@gmail.com>
Cc: help-guix@gnu.org

Hello!

Daniel Drake <silophophe@gmail.com> skribis:

> I've noted the dependencies member of the file-system object:  "This
> is a list of <file-system> objects representing file systems that must
> be mounted before (and unmounted after) this one."
>
> In the preamble, I define the root file-system:
>
>   (define vol-root (file-system  (device "vol-root")  (title 'label)
> (mount-point "/")  (type "ext4")))
>
> Then I add the root file system to the file-systems list, along with
> the file-system for the home directory:
>
>   (operating-system
>     ...
>     (file-systems
>       (cons*
>         vol-root
>         (file-system  (device "vol-home")  (title 'label)
> (mount-point "/home")  (type "ext4")  (dependencies '(vol-root)) )

This should be:

  (dependencies (list vol-root))

> I found a related issue in one of the IRC logs that modified the
> dependencies argument like this:
>   (dependencies (list vol-root))

=E2=80=A6 which you already found.  :-)

> within the file-system object for the home directory.
> In that instance, the error seems almost resolvable:
> guix system: error: `file-system-/home' requires 'file-system-/',
> which is not provided by any service

Right.

In fact, the root file system is always mounted before anything else, so
the =E2=80=98dependencies=E2=80=99 field here is unneeded.

(That case could be handled more gracefully though.)

So in short, all you need is to write things like this:

  (operating-system
    ;; =E2=80=A6
    (file-systems (list (file-system (device "vol-root") =E2=80=A6)
                        (file-system (device "vol-home") =E2=80=A6))))

without any =E2=80=98dependencies=E2=80=99 field.

HTH!

Ludo=E2=80=99.