zimoun <zimon.toutoune@gmail.com> writes:

> Dear,
>
> When speaking about "Scientific Reproducibilty", one would roll-back
> to a previous state of Guix. And it is possible with `guix pull
> --commit=<hash>'.
>
> (noting it is only possible for not too old states, say v0.15 or post-inferior?)
>
>
> However, it is not possible to roll-back the state of a custom
> channel. Or I have missed something.
>
> The UI should be: guix pull --commit=channel1:hash1  --commit=channel2:hash2
> or guix pull --commit=channel1:hash1,channel2:hash2

I don't think `guix pull` exposes these options through the CLI yet, but
you can specify exact commit(s) in channels.scm.

> Moreover, is it possible to roll-back with a manifest containing
> several custom channels ?
>
> I imagine something such that:
>  guix describe > commits.txt
> then months (or years?) later:
>  guix pull --manifest=commits.txt

This is already possible:

 $ guix describe -f channels > my-channels.scm
 $ guix pull -C my-channels.scm

HTH!
Marius