On Tue, 2019-06-25 at 07:16 -0400, Nico Kadel-Garcia wrote:
> On Wed, Jun 19, 2019 at 9:31 AM Panu Matilainen <pmatilai@xxxxxxxxxx>
> wrote:
> > On 6/19/19 1:51 PM, Aleš Matěj wrote:
> > > > At this point, the drpm library is the only blocker for zstd
> > > > payloads,
> > > > since createrepo_c needs to be able to handle zstd drpms.
> > >
> > > I looked into the drpm library and I should be able to add the
> > > zstd support
> > > (and make sure it works with createrepo_c)
> > >
> > > Working on it now.
> >
> > FWIW, as drpm links to librpm anyway, it should be possible for
> > drpm to
> > just use the file API from rpm to gain support for everything that
> > rpm
> > does instead of duplicating the effort for all the compression
> > types.
> >
> > If there's something broken or missing that prevents this from
> > working,
> > we could always address that...
> >
> > - Panu -
>
> This whole zstd replacement seems like a hazardous idea, because of
> backporting SRPMs to older operating systems for EPEL compilation.
> It's possible, but awkward, to chew through the git repos to deduce
> whch git branch was used and reference that, rather than directly
> extract from the SRPM. It would mean that unless this compression is
> only applied to limited uses such as drpm, then older OS releases
> would not be able to read the modern SRPM by default. Backwards
> compatibility is not why people write new software, but broad
> accessibility of the source code seems a vital feature to preserve
> for
> what should be rock stable build environments downstream.
>
> I, for one, have done considerable backporting of Fedora SRPMs of
> python modules to RHEL and CentOS environments. I'd hate to add
> another step to extract them on RHEL or CentOS or to build from them
> in "mock". I'd also hate for "rpm2cpio" to break: I hope adding zstd
> compatibility to the older versions of that tool, as well, is not
> difficult.
This is change is strictly only about binary rpm payload compression
method change not at all about SRPMs.
--
Tomáš Mráz
No matter how far down the wrong road you've gone, turn back.
Turkish proverb
[You'll know whether the road is wrong if you carefully listen to your
conscience.]
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