Deltarpm *not* ready for new RPM checksums (was Re: Ready for new RPM version?)

Seth Vidal skvidal at
Mon Mar 9 19:25:12 UTC 2009

On Mon, 9 Mar 2009, Jonathan Dieter wrote:

> Yeah, just ran into some difficulty putting this together.  My original
> plan was to modify deltarpm to be able to read sha256 checksums while
> sticking with md5 checksums in the deltarpm (to maintain compatibility
> in rpm-only deltarpms).
> The problem is that the sequence is generated from the sha256 checksums,
> and there's no elegant way (at least as far as I can see) to get md5
> checksums for the files in the rpm without completely regenerating them.
> The alternative is to use sha256 for all of the checksums in a deltarpm
> targeting a sha256 rpm, but, like I mentioned earlier, that could cause
> some issues in the rpm-only deltarpms (the rpm-only format has no tags
> to specify checksum type, so we'd need to be update the format, and I'm
> not going to do that without your input).
> Is there something I'm missing here?  Or will we need to update the
> rpm-only format?

Sounds like the format will need to be updated one way or the other if all 
of the above is true.

> P.S. CC'ing fedora-devel-list as (at least according the Presto feature
> page), we're supposed to be generating deltarpms for F11-alpha ->
> F11-beta after beta freeze, and that can't happen until we get this
> working.

I generated and tested deltarpms but the last time I tested it was before
rpm w/sha256 checksums had landed in rawhide.

> P.P.S. I just became aware of this last week as I was attempting to
> create deltarpms for the Presto test Rawhide repository; sorry for the
> lack of notice, Seth and Luke

Thanks for the heads up - what would you like to do here?


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