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Re: Add "--show-all" revision walker flag for debugging

From
Linus Torvalds <torvalds@linux-foundation.org>
Date
Feb 10, 2008, 23:11 UTC
Message-ID
<alpine.LFD.1.00.0802101507100.2896@woody.linux-foundation.org>
In-Reply-To
<200802102353.40230.jnareb@gmail.com>
On Sun, 10 Feb 2008, Jakub Narebski wrote:
Show 5 quoted lines
> 
> Well, we could always add it as a local (per repository) "cache".
> With only generation numbers we could use pack-index-like format
> to store a mapping "commit sha-1 => generation number", just like
> now pack index stores mapping "object sha-1 => offset in pack".

Yes, and even embedding this in the pack-file (or perhaps, the index, as a new index extension) is probably a good idea.

> If we want to store also roots, we could either map 
> "commit sha-1 => generation number, roots set offset / id" (constant
> length value)[*1*], or have gen-*.gen file with generation numbers
> and roots, and gen-*.idx as index to that file.

The thing is, the roots are almost never actually interesting. Very seldom do you have any issue with different commits having different roots. So I really don't think it's worth it, considering that it's also much more complicated than just adding a sequence number to each commit.

		Linus
Previous: Jakub NarebskiNext: Jakub Narebski
Message 15 of 20 in “Add "--show-all" revision walker flag for debugging”
  1. Linus TorvaldsFeb 9, 2008
  2. Linus TorvaldsFeb 9, 2008
  3. Junio C HamanoFeb 10, 2008
  4. Johannes SchindelinFeb 10, 2008
  5. Linus TorvaldsFeb 10, 2008
  6. Johannes SchindelinFeb 10, 2008
  7. Junio C HamanoFeb 10, 2008
  8. Junio C HamanoFeb 10, 2008
  9. Nicolas PitreFeb 10, 2008
  10. Johannes SchindelinFeb 10, 2008
  11. Jakub NarebskiFeb 10, 2008
  12. Linus TorvaldsFeb 10, 2008
  13. Nicolas PitreFeb 10, 2008
  14. Jakub NarebskiFeb 10, 2008
  15. Linus TorvaldsFeb 10, 2008
  16. Jakub NarebskiFeb 11, 2008
  17. Nicolas PitreFeb 11, 2008
  18. Linus TorvaldsFeb 11, 2008
  19. Jakub NarebskiFeb 11, 2008
  20. Nicolas PitreFeb 11, 2008

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