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Re: [RFH] filter-branch: ancestor detection weirdness

From
Johannes Schindelin <johannes.schindelin@gmx.de>
Date
Aug 8, 2008, 14:39 UTC
Message-ID
<alpine.DEB.1.00.0808081632580.24820@pacific.mpi-cbg.de.mpi-cbg.de>
In-Reply-To
<200808081614.44422.trast@student.ethz.ch>
Hi,
On Fri, 8 Aug 2008, Thomas Rast wrote:
> I think a more careful use of rev-list -1 is actually a correct and easy 
> way to figure out an ancestor.

I have not looked at your patch closely, or at your explanation, but I am really certain that every attempt to replace the --boundary with a -1 must fail.

Let me show you why I think that.  Just look at this history:
A - B - C
  /
D
Where all commits except B touch the inside directory.  Two options:
- you make C a merge (that's what I tried with --boundary), or
- you record B, and C as a commit that does not introduce changes, which 
  is obviously wrong, or
- you record B as a merge, with identical content as A and D, which is 
  pretty tricky (which is why I avoided it).

Anyway, I am really swamped in work, and will not have time to review big changes or explanations. Besides, filter-branch is no fun. rewrite-commits would have been, but Sven chickened out.

Ciao, Dscho

Previous: Thomas RastNext: Thomas Rast
Message 15 of 35 in “git filter-branch --subdirectory-filter, still a mistery”
  1. Jan WielemakerAug 6, 2008
  2. Jan WielemakerAug 7, 2008
  3. Thomas RastAug 7, 2008
  4. Jan WielemakerAug 7, 2008
  5. Thomas RastAug 7, 2008
  6. filter-branch: be more helpful when an annotated tag changesThomas Rast, Aug 7, 2008
  7. filter-branch: add option --delete-unchangedThomas Rast, Aug 8, 2008
  8. Johannes SchindelinAug 9, 2008
  9. Jan WielemakerAug 11, 2008
  10. Felipe ContrerasSep 14, 2008
  11. [RFH] filter-branch: ancestor detection weirdnessThomas Rast, Aug 7, 2008
  12. Johannes SchindelinAug 8, 2008
  13. Thomas RastAug 8, 2008
  14. filter-branch: fix ancestor discovery for --subdirectory-filterThomas Rast, Aug 8, 2008
  15. Johannes SchindelinAug 8, 2008
  16. Thomas RastAug 8, 2008
  17. filter-branch: fix ref rewriting with --subdirectory-filterThomas Rast, Aug 8, 2008
  18. Johannes SchindelinAug 9, 2008
  19. Junio C HamanoAug 9, 2008
  20. Thomas RastAug 9, 2008
  21. Thomas RastAug 9, 2008
  22. filter-branch: use --simplify-mergesThomas Rast, Aug 10, 2008
  23. Junio C HamanoAug 12, 2008
  24. Junio C HamanoAug 12, 2008
  25. Thomas RastAug 12, 2008
  26. Junio C HamanoAug 12, 2008
  27. Petr BaudisAug 12, 2008
  28. Junio C HamanoAug 12, 2008
  29. Thomas RastAug 9, 2008
  30. Junio C HamanoAug 12, 2008
  31. Thomas RastAug 12, 2008
  32. Jan WielemakerAug 8, 2008
  33. Jan WielemakerAug 8, 2008
  34. Documentation: filter-branch: document how to filter all refsThomas Rast, Aug 7, 2008
  35. Documentation: filter-branch: document how to filter all refsThomas Rast, Aug 7, 2008

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