Re: guix pull avoidance

[ludo@gnu.org (Ludovic Courtès)]

Vincent Legoll <vincent.legoll@gmail.com> skribis:

> Hello,
>
>> How's the following totally untested, probably buggy patch ?
>
> After painful testing (I have to remove the .config/guix/latest symlink
> each time, make it point back to ~/guix_git with my modifications, and
> it recompiles a whole bunch of scm files...)
>
> Any idea how to improve that ?
>
>> it's in RFC, to show the intended effects...
>
> I fixed a few silly mistakes...
>
>> What's inside:
>>
>> - create a symlink /gnu/store/latest pointing to the last installed
>> /gnu/store/*-guix-latest
>
> This is failing with :
>
> guix pull: error: symlink: Read-only file system: "/gnu/store/latest.new"

/gnu/store is read-only, except for guix-daemon, so ‘guix pull’ cannot
write to it.

> * I don't think I fully understand that, as the "->" in the mlet* for
> instance, I
> couldn't find explanations in guile's refman nor guix's...

  (mlet %store-monad ((x -> foo)) (bar))

is equivalent to:

  (let ((x foo)) (bar))

Ludo’.