[bug#51548] [PATCH] services: Create /run and /var/run on activation.

[Tom Fitzhenry]

Having thought about this patch some more, I think it can be better done.

On 1/11/21 22:39, Tom Fitzhenry wrote:
>                         ;; thus there is no accounting at all.
> +                      (mkdir-p "/var/run")

This line will create /var/run if it doesn't exist during activation. 
This is safe, but there is already code that creates /var/run : 
https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/build/install.scm?id=63c356fe13f0c7cc560a1f9aeec4926422c22137#n120 
. This runs on installation.

By adding this line, this responsibility is split across two parts of 
the code base: installation and activation. This could cause confusion.

If, as this patch intends, we want to be able to boot from just /boot, 
/gnu and /var/guix, perhaps we should move 
https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/build/install.scm?id=63c356fe13f0c7cc560a1f9aeec4926422c22137#n120 
(and surrounding code) from running at install-time to running at 
activation-time.