bug#44196: [PATCH 2/3] system: Add store-directory-prefix to boot-parameters.

[Ludovic Courtès]

Hi!

Miguel Ángel Arruga Vivas <rosen644835@gmail.com> skribis:

> From 527a9271122f7b83f31dc0b910c6704af81bde66 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Miguel=20=C3=81ngel=20Arruga=20Vivas?=
>  <rosen644835@gmail.com>
> Date: Sat, 24 Oct 2020 18:15:53 +0200
> Subject: [PATCH 2/2] system: Add store-directory-prefix to boot-parameters.
>
> * gnu/machine/ssh.scm (roll-back-managed-host): Use
> boot-parameters-store-directory-prefix.
> * gnu/system.scm (define-module): Export
> boot-parameters-store-directory-prefix.
> (<boot-parameters>)[store-directory-prefix]: New field.
> [boot-parameters-store-directory-prefix]: New accessor.
> (read-boot-parameters): Read directory-prefix from store field.
> (operating-system-boot-parameters-file): Add directory-prefix to
> store field.
> * guix/scripts/system.scm (reinstall-bootloader): Use
> boot-parameters-store-directory-prefix.
> * test/boot-parameters.scm (%default-btrfs-subvolume,
> %default-store-directory-prefix): New variables.
> (%grub-boot-parameters): Use %default-store-directory-prefix.
> (%default-operating-system): Use %default-btrfs-subvolume.
> (test-boot-parameters): Add directory-prefix.
> (test optional fields): Add test for directory-prefix.
> (test os store-directory-prefix): New test.

[...]

> +++ b/gnu/system.scm
> @@ -148,6 +148,7 @@
>              boot-parameters-bootloader-name
>              boot-parameters-bootloader-menu-entries
>              boot-parameters-store-device
> +            boot-parameters-store-directory-prefix
>              boot-parameters-store-mount-point
>              boot-parameters-locale
>              boot-parameters-kernel
> @@ -299,6 +300,7 @@ directly by the user."
>     boot-parameters-bootloader-menu-entries)
>    (store-device     boot-parameters-store-device)
>    (store-mount-point boot-parameters-store-mount-point)
> +  (store-directory-prefix boot-parameters-store-directory-prefix)

Could you explain why we need ‘store-directory-prefix’ in addition to
‘store-mount-point’?  At first sight, looking at the fields in there,
these two can seem to be synonymous.

Also patch #3 doesn’t depend on it, does it?

Thanks,
Ludo’.