Re: Bug#892664: dpkg: Please add support for zstd (Zstandard) compressed packages
Hi Tomas,
Tomas Pospisek <tpo@sourcepole.ch> ezt írta (időpont: 2021. nov. 28., V, 16:25):
>
> Rustam wrote on 12 Oct 2021:
>
> > Hi Guillem,
> > Any news on the proposed patch?
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892664#49
> > Can it be merged already? ;)
> > Ubuntu packages are already using zstd compression. So tools like
> > Mainline don't work on Debian any more, see e.g.
> > https://github.com/bkw777/mainline/issues/121
>
> More than that: AFAIU Ubuntu has in fact switched its default compressor
> to zstd [1], so Debian's tools haven't been able to understand Ubuntu's
> freshly generated packages from 2021-06-14 on.
>
> I have applied [2] Bálint's commit to *current* dpkg from git:
>
> * there was a trivial merge conflict in man/deb.pod, which is easily fixed [3]
> * in my dpkg git repo and zstd branch I have changed the patch author
> (including the merge conflict fix) back from me to Bálint [3], which
> might not be the right/clean way to do things, but that's a minor thing
> I can fix if Guillem would want that
> * dpkg-buildpackage built the patched package fine
> * I only did a smoketest with the resulting dpkg :
> `dpkg -x sbsigntool_0.9.4-2ubuntu1_amd64.deb foodir` [4]
> which successfully unpacked Ubuntu's zstd compressed sbsigntool package
> into the foodir directory
>
> So I am reporting that Bálint's patch [4] applies cleanly (with a
> trivially to solve merge conflict (see above)) and works (again see above
> for the minimal testing I did), has been in production in Ubuntu since
> 2021-04-14 and zstd is beeng used as default compressor in Ubtuntu since
> 2021-06-14.
>
> Of course I would welcome it very much if Debian's tools would be
> compatible and allow to work with Ubtuntu's packages. Concrete point
> in case: it would have made my life easier figuring out Ubuntu's mechanism
> to sign user-generated modules [5].
For the record a few Debian packages already work around dpkg's
inability to process zstd-compressed archives.
> Thanks a lot to all involved! For Guillem's work on dpkg, Bálint for the
> patch and all others for their contributions here and in Ubuntu!!!
You are welcome. I hope many users of Ubuntu and Ubuntu derivatives
will enjoy the fast installs and upgrades.
@all: For the record I'm not working on this bug anymore. Feel free to
close it or pick up the work from here.
Cheers,
Balint
> Greets,
> *t
>
> [1] http://changelogs.ubuntu.com/changelogs/pool/main/d/dpkg/dpkg_1.20.9ubuntu2/changelog
> [2] https://salsa.debian.org/tpo/dpkg/-/tree/zstd
> [3] https://salsa.debian.org/tpo/dpkg/-/commit/e7cb231bc289d356f563c1e2c761d94c85aa7055
> [4] https://packages.ubuntu.com/impish/amd64/sbsigntool/download
> [5] https://salsa.debian.org/rbalint/dpkg/-/commit/eb38de93eeb9524a54e80525c480df249828e84f
> [6] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=939392
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