DNF feature request: usefully undo updates-testing transactions, or clarify instructions

[Igor Gnatenko]

Open bug please.

On Wed, Feb 25, 2015 at 4:26 AM, Andrew Lutomirski <luto at mit.edu> wrote:
> I just messed up and did:
>
> # dnf --enablerepo=updates-testing upgrade
>
> and upgraded everything instead of just the thing I was trying to
> upgrade.  I want to undo that, but it seems to be impossible.
>
> # dnf history undo 119
> [...]
> No package libreoffice-base-1:4.3.5.2-11.fc21.x86_64 available.
> Error: An operation cannot be undone
>
> # dnf distro-sync
> Using metadata from Tue Feb 24 17:15:49 2015
> Error: package ghostscript-x11-9.15-6.fc21.x86_64 requires
> ghostscript(x86-64) = 9.15-6.fc21, but none of the providers can be
> installed
>
> Gee, thanks.
>
> As it happens, # dnf distro-sync --allowerasing works.  Perhaps # dnf
> distro-sync could suggest --allow-erasing.
>
> Also, there's a bug here:
>
> # dnf distro-sync --allowerasing
> [...]
> Transaction Summary
> ================================================================================
> Downgrade  132 Packages
>
> Total download size: 186 M
> Is this ok [y/N]: y
>
> So I shouldn't have needed --allowerasing in the first place.
>
> An alternative would be to add a most that undoes the last transaction
> and updates at the same time.  That way it could undo my accidental
> transaction but only depend on versions of packages that still exist
> in updates.
>
> --Andy
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-- 
-Igor Gnatenko