bug#41604: guix pull impossible after rebasing a local repository

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

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

> On Sun, 7 Jun 2020 at 23:16, Ludovic Courtès <ludo@gnu.org> wrote:
>
>> I did this:
>>
>>   https://git.savannah.gnu.org/cgit/guix.git/commit/?id=1fd7de45f218ce572a3fe87764ad15927e3dbdc4
>
> Cool!  Thank you.
>
>> So now, in a situation like John described, ‘guix pull’ will print the
>> error and hint for unrelated commits.
>
> Yes! Perfect! :-)
>
> From a removed commit: "guix pull" says:
>
> guix pull: error: aborting update of channel 'guix' to commit
> e78275608065ef073775fabb9f1a757da65851f2, which is not a descendant of
> b50fb18a610e2a495624bf4570bec60265332615
> hint: Use `--allow-downgrades' to force this downgrade.
>
>
> then using the hint, it says:
>
> guix pull: warning: moving channel 'guix' from
> b50fb18a610e2a495624bf4570bec60265332615 to unrelated commit
> e78275608065ef073775fabb9f1a757da65851f2
> Building from this channel:
>   guix      https://git.savannah.gnu.org/git/guix.git   e782756

Thanks for testing, closing!

> Just to note that the hint
>
> hint: This could indicate that the channel has been tampered with and is trying
> to force a roll-back, preventing you from getting the latest updates.  If
> you think this is not the case, explicitly allow non-forward updates.
>
> does not report explicitly the option '--allow-downgrades'.

Ah, right.

Ludo’.