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Re: clone breaks replace

From
Jonathan Nieder <jrnieder@gmail.com>
Date
Jan 11, 2011, 06:52 UTC
Message-ID
<20110111065244.GB8631@burratino>
In-Reply-To
<20110111054735.GC10094@sigill.intra.peff.net>
Jeff King wrote:
> On Fri, Jan 07, 2011 at 07:43:40PM -0500, Phillip Susi wrote:
>> What parts do not respect replacement?  More importantly, what parts
>> will be broken?
[...]
> Off the top of my head, I don't know. I suspect it would take somebody
> writing a patch to create such an incomplete repository (or making one
> manually) and seeing how badly things broke.
I have two worries:
 - first, how easily can the replacement be undone? (as you mention
   below)
 - second, what happens if the two ends of transport have different
   replacements?

That second worry is the more major in my opinion. Shallow clones are a different story --- they do not fundamentally change the history and they have special support in git protocol. It is possible to punt on both by saying that (1) replacements _cannot_ be undone --- a second replacement is needed --- and (2) the receiving end of a connection is not allowed to have any replacements for objects in common that the sending end does not have, but then does that buy you anything significant over a filter-branch?

Previous: Jeff KingNext: Phillip Susi
Message 21 of 34 in “clone breaks replace”
  1. Phillip SusiJan 6, 2011
  2. Jonathan NiederJan 6, 2011
  3. Junio C HamanoJan 6, 2011
  4. Phillip SusiJan 7, 2011
  5. Jonathan NiederJan 7, 2011
  6. Stephen BashJan 7, 2011
  7. Jonathan NiederJan 7, 2011
  8. Phillip SusiJan 7, 2011
  9. Jonathan NiederJan 7, 2011
  10. Phillip SusiJan 7, 2011
  11. Jeff KingJan 7, 2011
  12. Junio C HamanoJan 7, 2011
  13. Jeff KingJan 11, 2011
  14. Junio C HamanoJan 11, 2011
  15. Jeff KingJan 11, 2011
  16. Jonathan NiederJan 11, 2011
  17. Jeff KingJan 11, 2011
  18. Christian CouderJan 11, 2011
  19. Phillip SusiJan 8, 2011
  20. Jeff KingJan 11, 2011
  21. Jonathan NiederJan 11, 2011
  22. Phillip SusiJan 11, 2011
  23. Jonathan NiederJan 11, 2011
  24. Phillip SusiJan 11, 2011
  25. Phillip SusiJan 11, 2011
  26. Jeff KingJan 11, 2011
  27. Johannes SixtJan 11, 2011
  28. Jeff KingJan 11, 2011
  29. Johannes SixtJan 11, 2011
  30. Phillip SusiJan 11, 2011
  31. Jonathan NiederJan 11, 2011
  32. Phillip SusiJan 12, 2011
  33. small downloads and immutable history (Re: clone breaks replace)Jonathan Nieder, Jan 14, 2011
  34. Phillip SusiJan 15, 2011

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