Re: [PATCH 06/10] rev-list: add --allow-partial option to relax connectivity checks
- From
- Jeff Hostetler <git@jeffhostetler.com>
- Date
- Mar 8, 2017, 20:10 UTC
- Message-ID
- <2cc503b4-f6cf-336a-bc3f-f44b1d187eaf@jeffhostetler.com>
- In-Reply-To
- <xmqqd1dr38f0.fsf@gitster.mtv.corp.google.com>
On 3/8/2017 1:55 PM, Junio C Hamano wrote:
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> Jeff Hostetler <jeffhost@microsoft.com> writes: > >> From: Jeff Hostetler <git@jeffhostetler.com> >> >> Teach rev-list to optionally not complain when there are missing >> blobs. This is for use following a partial clone or fetch when >> the server omitted certain blobs. > > This makes it impossible to tell from objects missing by design > (because we did an --partial-by-size clone earlier, expecting we can > later fetch from elsewhere when necessary) and objects inaccessible > by accident (because you have a repository corruption), no?
Right. It will effectively neuter several commands like index-pack, gc, and fsck WRT missing blobs.
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> Even though I do very much like the basic "high level" premise to > omit often useless large blobs that are buried deep in the history > we would not necessarily need from the initial cloning and > subsequent fetches, I find it somewhat disturbing that the code > "Assume"s that any missing blob is due to an previous partial clone. > Adding this option smells like telling the users that they are not > supposed to run "git fsck" because a partially cloned repository is > inherently a corrupt repository. > > Can't we do a bit better? If we want to make the world safer again, > what additional complexity is required to allow us to tell the > "missing by design" and "corrupt repository" apart?
I'm open to suggestions here. It would be nice to extend the fetch-pack/upload-pack protocol to return a list of the SHAa (and maybe the sizes) of the omitted blobs, so that a partial clone or fetch would still be able to be integrity checked.
Jeff