Re: Backwards-incompatible RPM format change in Fedora 34?

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On Thu, Jan 21, 2021 at 02:24:49PM -0600, Chris Adams wrote:
> Once upon a time, Zbigniew Jędrzejewski-Szmek <zbyszek@xxxxxxxxx> said:
> > Oh, I didn't fully understand your comment at the time. I automatically assumed
> > that "enabled in production" only means that the *code* is there, i.e. that
> > the version of rpm has been updated in preparation. Actually enabling this
> > while the proposal is being discussed is definitely NOT OK. It makes
> > mockery of the whole Change process and deliberation on fedora-devel and
> > the fesco ticket.
> 
> I have to say, I didn't realize that the RPM format was being changed in
> a backwards-incompatible way.  I don't see that mentioned ONCE in the
> change proposal, and that's a very large thing to miss.

I don't think anyone did. Patrick was working from the rpm spec I think
that says that header is 64MB. It was not.
> 
> I think that alone is enough to kill any such proposal until the
> compatible versions of RPM are in widespread use.  It has wide-ranging
> impact - we still have "rpmbuild-md5" for back compat for example
> (although that could probably be retired now; think EPEL 5 was that last
> thing that needed it?).  That's needed for package developers working on
> multiple releases/versions; there'd need to be another back-compat
> rpmbuild (at least), for example for running on a desktop of Fedora 33
> but working on a package for EPEL 7.

Well, we have changed rpm in fedora serveral other times too... 
zstd compression most recently. 

kevin

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