Borg backup is complaining about msgpack python package version

[Clemens Lang]

Hi again,

On Fri, Jan 05, 2024 at 01:45:46PM +0100, Clemens Lang wrote:
> On Thu, Dec 28, 2023 at 10:42:25PM -0800, Kenneth Wolcott wrote:
> > You do not have a supported version of the msgpack python package
> > installed. Terminating.
> > This should never happen as specific, supported versions are required
> > by our setup.py.
> > Do not contact borgbackup support about this.
> > terminating with error status, rc 2
> 
> For reasons I don't understand, borgbackup wants to allow-list every new
> version of the msgpack library manually, so every update of the msgpack
> library breaks borgbackup.
> 
> jmr committed the last update to msgpack in
>   https://github.com/macports/macports-ports/commit/0dce65698d178a176c0984859080d6ff9da07fe8
> 
> The upstream change to allow msgpack 1.0.7 is
>   https://github.com/borgbackup/borg/commit/cdcab4df6851b5d3da6ac5435bcaeb8aa1d632b5
> 
> You'll notice that this change does not come with any modifications of
> the source code otherwise, so msgpack 1.0.7 would work with your
> existing version of borgbackup, but it refuses it for no good reason.
> 
> This upstream commit is not in a tagged release yet, so we need to
> backport it manually to borgbackup.

Actually, the relevant commit is
https://github.com/borgbackup/borg/commit/39761ebadc9325a7cc7e931144e2709effe8f0f0,
and that has been backported to the 1.2 branch of borgbackup and is in
1.2.7, so just make sure you have the latest borgbackup installed and it
should start working again.

-- 
Clemens