Re: dpkg with threaded xz decompression.

[Sérgio Basto <sergio@serjux.com>]

On Wed, 2022-09-28 at 01:43 +0200, Guillem Jover wrote:
> Hi!
> 
> On Tue, 2022-09-27 at 21:44:36 +0200, Sebastian Andrzej Siewior
> wrote:
> > XZ Utils 5.3.3alpha has been released and one of the highlights is
> > a
> > threaded .xz decompressor. See
> >         
> > https://www.mail-archive.com/xz-devel@tukaani.org/msg00591.html
> > 
> > Assuming the final stable release by streams happens in December,
> > would
> > there still be time to have dpkg support for it targeting Bookworm?
> > Would it help to have the current alpha version experimental?
> > Is there anything I could help with?
> 
> Ah! I was looking into this a couple of weeks back, and was wondering
> how to proceed. I merged all the needed patches into dpkg git main
> except for the last patch enabling the threaded decompressor. The
> problem is that I wanted to retest it, as the xz implementation
> changed upstream, and I had adapted it to the new API, but I run out
> of steam when I was confronted with having to update the xz-utils
> packaging for the alpha branch.

BTW not about xz , but Zstd, which is available on dpkg (1.21.1ubuntu1)

  [..]
    - Add Zstd compression and decompression support for binary
packages.

i.e. maybe also include Zstd to be compatible with Ubuntu 

reference : https://bugzilla.redhat.com/show_bug.cgi?id=2112807


> So having that packaged in experimental would help. My main concern
> was that given that this is in an alpha, I'm not sure what API
> guarantees are there. But I was considering committing the patch
> (once
> tested) anyway, which would end up being disabled until the xz-utils
> version gets uploaded to sid, and would require just a binNMU (if
> necessary).
> 
> Thanks,
> Guillem
> 

-- 
Sérgio M. B.