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Re: [PATCH v10 6/9] ls-tree.c: support --object-only option for "git-ls-tree"

From
Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Date
Jan 14, 2022, 11:47 UTC
Message-ID
<220114.86ilumttn2.gmgdl@evledraar.gmail.com>
In-Reply-To
<CADMgQSQXLydvgpW+Vm_b-rkSWAuj9FezwveY-iRZnKfsGkOpCA@mail.gmail.com>
On Fri, Jan 14 2022, Teng Long wrote:
Show 13 quoted lines
> On Thu, Jan 13, 2022 at 3:02 PM Ævar Arnfjörð Bjarmason
> <avarab@gmail.com> wrote:
>
>> In the RFC series I sent this was first implemented in terms of the
>> --format option, and I skipped the custom implementation you're adding
>> here:
>> https://lore.kernel.org/git/RFC-patch-7.7-5e34df4f8dd-20211217T131635Z-avarab@gmail.com/
>>
>> I think in terms of patch series structure it would make sense to do
>> that, and then have this custom --object-only implementation in terms of
>> not-"--format " follow from that, and thus with the tests for the two
>
> Sorry, the "not-"--format" means?

Sorry about not being clear. I mean there's two potential implementations. One that't is terms of --format='%(objectname)', and the other with your custom (faster) code to implement it.

Show 9 quoted lines
>> (we'd add the tests you're adding here first, just for a
>> --format="%(objectname)" or whatever) we'd see that the two are 1=1
>> equivalent in terms of functionality, but that this one is <X>% more
>> optimized.
>
> Please allow me to understand your advice,  if we put the commit of
> introducing "--format" before the commit of introducing "--object-only", will
> be better because it's possible to supply more optimized performance
> (if we have) information in the commit message.

Yes, you get the functionality you need with a simple alias of --format='%(objectname)' to --object-name (or whatever), so the only reason to carry the extra code is for optimization.

I wonder if the extra difference in performance is still something you care about, or if just the --format implementation would be OK.

But in any case, starting with a simpler implementation and testing it makes the progression easier to reason about.

Previous: Teng LongNext: Teng Long
Message 64 of 74 in “ls-tree: "--object-only" and "--format" opts”
  1. 0/8 ls-tree: "--object-only" and "--format" optsTeng Long, Jan 1, 2022
  2. 1/8 ls-tree: remove commented-out codeTeng Long, Jan 1, 2022
  3. 2/8 ls-tree: add missing braces to "else" armsTeng Long, Jan 1, 2022
  4. 3/8 ls-tree: use "enum object_type", not {blob,tree,commit}_typeTeng Long, Jan 1, 2022
  5. 4/8 ls-tree: use "size_t", not "int" for "struct strbuf"'s "len"Teng Long, Jan 1, 2022
  6. 5/8 ls-tree: split up the "init" part of show_tree()Teng Long, Jan 1, 2022
  7. Junio C HamanoJan 4, 2022
  8. Teng LongJan 4, 2022
  9. 6/8 ls-tree.c: support --object-only option for "git-ls-tree"Teng Long, Jan 1, 2022
  10. Junio C HamanoJan 4, 2022
  11. Teng LongJan 4, 2022
  12. 7/8 ls-tree.c: introduce struct "shown_data"Teng Long, Jan 1, 2022
  13. Junio C HamanoJan 3, 2022
  14. Teng LongJan 4, 2022
  15. 8/8 ls-tree.c: introduce "--format" optionTeng Long, Jan 1, 2022
  16. Johannes SchindelinJan 4, 2022
  17. Johannes SchindelinJan 4, 2022
  18. Teng LongJan 5, 2022
  19. Teng LongJan 5, 2022
  20. Johannes SchindelinJan 5, 2022
  21. Teng LongJan 5, 2022
  22. 0/9 ls-tree.c: introduce "--format" optionTeng Long, Jan 6, 2022
  23. 1/9 ls-tree: remove commented-out codeTeng Long, Jan 6, 2022
  24. 2/9 ls-tree: add missing braces to "else" armsTeng Long, Jan 6, 2022
  25. 3/9 ls-tree: use "enum object_type", not {blob,tree,commit}_typeTeng Long, Jan 6, 2022
  26. 4/9 ls-tree: use "size_t", not "int" for "struct strbuf"'s "len"Teng Long, Jan 6, 2022
  27. 5/9 ls-tree: optimize naming and handling of "return" in show_tree()Teng Long, Jan 6, 2022
  28. Junio C HamanoJan 6, 2022
  29. Teng LongJan 11, 2022
  30. 6/9 ls-tree.c: support --object-only option for "git-ls-tree"Teng Long, Jan 6, 2022
  31. 7/9 ls-tree.c: introduce struct "show_tree_data"Teng Long, Jan 6, 2022
  32. 8/9 ls-tree.c: introduce "--format" optionTeng Long, Jan 6, 2022
  33. Martin ÅgrenJan 10, 2022
  34. Teng LongJan 11, 2022
  35. 9/9 cocci: allow padding with `strbuf_addf()`Teng Long, Jan 6, 2022
  36. Johannes SchindelinJan 7, 2022
  37. Teng LongJan 10, 2022
  38. Johannes SchindelinJan 10, 2022
  39. Teng LongJan 10, 2022
  40. Junio C HamanoJan 10, 2022
  41. Ævar Arnfjörð BjarmasonJan 10, 2022
  42. Junio C HamanoJan 10, 2022
  43. Ævar Arnfjörð BjarmasonJan 10, 2022
  44. Teng LongJan 11, 2022
  45. Taylor BlauJan 11, 2022
  46. René ScharfeJan 11, 2022
  47. Taylor BlauJan 11, 2022
  48. Teng LongJan 13, 2022
  49. Ævar Arnfjörð BjarmasonJan 11, 2022
  50. Teng LongJan 13, 2022
  51. Teng LongJan 13, 2022
  52. 0/9 ls-tree: "--object-only" and "--format" optsTeng Long, Jan 13, 2022
  53. 1/9 ls-tree: remove commented-out codeTeng Long, Jan 13, 2022
  54. 2/9 ls-tree: add missing braces to "else" armsTeng Long, Jan 13, 2022
  55. 3/9 ls-tree: use "enum object_type", not {blob,tree,commit}_typeTeng Long, Jan 13, 2022
  56. 4/9 ls-tree: use "size_t", not "int" for "struct strbuf"'s "len"Teng Long, Jan 13, 2022
  57. 5/9 ls-tree: optimize naming and handling of "return" in show_tree()Teng Long, Jan 13, 2022
  58. Ævar Arnfjörð BjarmasonJan 13, 2022
  59. Teng LongJan 14, 2022
  60. Ævar Arnfjörð BjarmasonJan 14, 2022
  61. 6/9 ls-tree.c: support --object-only option for "git-ls-tree"Teng Long, Jan 13, 2022
  62. Ævar Arnfjörð BjarmasonJan 13, 2022
  63. Teng LongJan 14, 2022
  64. Ævar Arnfjörð BjarmasonJan 14, 2022
  65. Teng LongJan 18, 2022
  66. Ævar Arnfjörð BjarmasonFeb 4, 2022
  67. Teng LongFeb 7, 2022
  68. 7/9 ls-tree.c: introduce struct "show_tree_data"Teng Long, Jan 13, 2022
  69. Ævar Arnfjörð BjarmasonJan 13, 2022
  70. Teng LongJan 14, 2022
  71. 8/9 cocci: allow padding with `strbuf_addf()`Teng Long, Jan 13, 2022
  72. 9/9 ls-tree.c: introduce "--format" optionTeng Long, Jan 13, 2022
  73. Ævar Arnfjörð BjarmasonJan 13, 2022
  74. Teng LongJan 18, 2022

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