From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Instantiating the OS declaration after a small change
Date: Fri, 06 Apr 2018 10:26:00 +0200
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References: <CAAD90k81ywdP8rU--5JCEFo0rWceurHTGbs8TnyFXj4m21HyVQ@mail.gmail.com>
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	(Arnaud B.'s message of "Thu, 5 Apr 2018 17:58:18 +0200")
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To: Arnaud B <arnaud.beaudhuin@gmail.com>
Cc: help-guix@gnu.org

Hello,

Arnaud B <arnaud.beaudhuin@gmail.com> skribis:

> Context :
> In the process of trying to build packages, through the use of guix
> environments, I need more space on my home partition.
> To do so, deleting former generations followed by 'guix gc' was not enoug=
h,
> and I need to move things to my external ntfs drive (please don't ask why=
 I
> have to use that file system...).
> As I'm regularly going to mount it, I added a file-system declaration in =
my
> config.scm.

OK.

> Question :
> Do I have to apply 'guix system reconfigure', a lenghty process (on my
> computer at least) for such a small change, especially if I did not write
> it correctly, or is there another possibility ?  I actually just want to
> test that file system declaration.
> From 6.2.13 of the manual, I'm thinking about 'guix system build'. Or cou=
ld
> I do it temporarily in another scm file ?

I have a similar use case: an external HDD that I plug in from time to
time.

What I do is declare it as not being automatically mounted on startup:

     (file-system
       (title 'uuid)
       (device (uuid "eeeeeeee-eeee-eeee-eeee-eeeeeeeeeeee"))
       (mount-point "/mnt/disk")
       (type "ext3")
       (mount? #f))

This adds an entry to /etc/fstab so when I plug it in, I can simply time
=E2=80=9Csudo mount /mnt/disk=E2=80=9D.

Now, if you use GNOME or similar, the udisks service and its friends are
support to automatically mount partitions from removable storage.

HTH,
Ludo=E2=80=99.