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Re: I'm a total push-over..

From
JMJeremy Maitin-Shepard <jbms@cmu.edu>
Date
Jan 25, 2008, 05:21 UTC
Message-ID
<87fxwmv5tf.fsf@jbms.ath.cx>
In-Reply-To
<alpine.LFD.1.00.0801230922190.1741@woody.linux-foundation.org>

Linus Torvalds wrote: [snip]

> So what you can do (and I'd argue that we do) is to have a hash that can 
> handle almost arbitrary input, but then never corrupt the filename, and 
> always compare exactly by default.

In general, there may be a large number of comparison function options that git will eventually support, and they will likely not all form a single chain of increasing "strictness".

Given that the hash values aren't even being stored on disk (and if they were, a simple approach of also storing an identifier for the hash function to know whether they stored values are still valid could be used), having a chain of increasingly "strict" comparison functions and using a hash function that corresponds to the least strict one is useful for exactly one reason: giving (possibly several different levels of) non-fatal warnings for various types of duplicates.

But since multiple hash functions will be needed anyway to support different notions of case-insensitivity, if the warning is not enabled, there is no reason to use a case-insensitive hash function with a byte-exact comparison.

-- 
Jeremy Maitin-Shepard
Previous: Linus TorvaldsNext: Johannes Schindelin
Message 18 of 51 in “I'm a total push-over..”
  1. Linus TorvaldsJan 22, 2008
  2. Kevin BallardJan 23, 2008
  3. Junio C HamanoJan 23, 2008
  4. Junio C HamanoJan 23, 2008
  5. Johannes SchindelinJan 23, 2008
  6. David KastrupJan 23, 2008
  7. Theodore TsoJan 23, 2008
  8. Linus TorvaldsJan 23, 2008
  9. Linus TorvaldsJan 23, 2008
  10. Junio C HamanoJan 25, 2008
  11. Linus TorvaldsJan 25, 2008
  12. Junio C HamanoJan 23, 2008
  13. Johannes SchindelinJan 23, 2008
  14. Linus TorvaldsJan 23, 2008
  15. Johannes SchindelinJan 23, 2008
  16. Linus TorvaldsJan 23, 2008
  17. Linus TorvaldsJan 23, 2008
  18. Jeremy Maitin-ShepardJan 25, 2008
  19. Johannes SchindelinJan 25, 2008
  20. Jeremy Maitin-ShepardJan 25, 2008
  21. Johannes SchindelinJan 25, 2008
  22. Junio C HamanoJan 25, 2008
  23. Andreas EricssonJan 23, 2008
  24. Dmitry PotapovJan 23, 2008
  25. Andreas EricssonJan 23, 2008
  26. Marko KreenJan 23, 2008
  27. Andreas EricssonJan 23, 2008
  28. Luke LuJan 24, 2008
  29. Andreas EricssonJan 24, 2008
  30. Marko KreenJan 24, 2008
  31. Andreas EricssonJan 24, 2008
  32. Marko KreenJan 24, 2008
  33. Dmitry PotapovJan 24, 2008
  34. Linus TorvaldsJan 24, 2008
  35. Dmitry PotapovJan 24, 2008
  36. Linus TorvaldsJan 24, 2008
  37. Marko KreenJan 25, 2008
  38. Linus TorvaldsJan 25, 2008
  39. Linus TorvaldsJan 25, 2008
  40. Marko KreenJan 26, 2008
  41. Linus TorvaldsJan 27, 2008
  42. Dmitry PotapovJan 27, 2008
  43. Johannes SchindelinJan 27, 2008
  44. Dmitry PotapovJan 27, 2008
  45. Marko KreenJan 27, 2008
  46. Dmitry PotapovJan 27, 2008
  47. Marko KreenJan 26, 2008
  48. Marko KreenJan 25, 2008
  49. Dmitry PotapovJan 23, 2008
  50. Andreas EricssonJan 24, 2008
  51. Linus TorvaldsJan 23, 2008

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