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Re: The git spring cleanup challenge

From
PWPhillip Wood <phillip.wood123@gmail.com>
Date
Jun 3, 2021, 14:28 UTC
Message-ID
<dbbb5a73-12b5-27a1-63d4-eece1e60f57b@gmail.com>
In-Reply-To
<87wnrb5cvl.fsf@evledraar.gmail.com>
Hi Ævar
On 03/06/2021 13:31, Ævar Arnfjörð Bjarmason wrote:
Show 10 quoted lines
> 
> On Thu, Jun 03 2021, Felipe Contreras wrote:
> 
>> Ævar Arnfjörð Bjarmason wrote:
>>> So I skipped the "disable most config", but for what it's worth I think
>>> I'd miss these the most, I couldn't pick just N favorites, sorry:
>>>
>>>   * diff.colorMoved=true: super useful, but I'd be vary of turning it on
>>>     by default in its current form. E.g. on gcc.git's changelog files it
>>>     has really pathological performance characteristics.

Would you be able say a bit more about this so I can try and reproduce it please. I'm working on some patches [1] to improve the performance of `diff --color-moved` and `diff --color-moved-ws` and it would be good to test them on a problematic repo. At the moment I diffing two releases of git to test performance on a large diff. I just cloned the last 18 months of gcc.git and Changelog seems to just be appended to.

>> Very nice! I didn't know about it. I'll pick it for my third day.
> 
> It makes patch review a lot easier, and also integrates nicely with -w.

I find --color-moved-ws=allow-indentation-change helpful as well (it is quite a bit slower at the moment but I have some patches to bring it up to the speed of the other --color-moved modes.

[1] https://github.com/phillipwood/git/tree/wip/diff-color-moved-tweaks
Show 24 quoted lines
> [...]
>>>   * commit.verbose=true: so you know what you're looking at in doing in
>>>     "git commit --amend".
>>
>> Aha! My alias had `commit -v` but I would want this on all commit
>> commands.
>>
>> Moreover, I was thinking on suggesting this by default. Who would it
>> hurt?
> 
> E.g. "git rebase -i" with "reword" now becomes a lot more verbose, I
> think it's a feature, but others might disagree.
> 
> It also exposes various edge cases around our parsing of the diff
> v.s. commit message content in our apply.c etc. code, e.g. say you want
> to blindly search-replace "diff" with "difference" in your commit
> messages. You'll now change the "diff --git" line to "difference --git",
> and now "commit" won't detect that it's the patch part anymore, and
> merge that diff into your commit message itself.
> 
> I can't remember if we pick up on "diff --git" exactly, IIRC, but
> anyway, whatever part of the format you need to screw with, the point
> stands. I've run into mistakes like that in the past, one recently made
> it to this ML.

I think the problem occurs if the scissors line gets messed up when editing the commit message

Show 15 quoted lines
>[...] 
>>> I also have a bunch of aliases that would not be useful to a general
>>> audience, but which I find I can't live without, some of the most
>>> commonly used ones:
>>>
>>>      # Log with "less" n/p already going to the next/prev commit
>>>      log-psfd = "!f() { PAGER=\"less -p'^commit'\" git log -p --stat --full-diff $@; }; f"
>>
>> Very neat.
> 
> I think similar to your "git help xyz" patches having coloring, we
> really should consider things like that by default knowing that we're
> invoking "less". I.e. if we got over the notion that our job is just to
> throw data over the wall to "man" or the pager without any further
> tweaking or integration.

Speaking personally it is not that I think that we should just throw data over the all to "man" but that if colors are a good idea we should be thinking about the whole ecosystem and working with distributions or the man authors to ensure all programs and users benefit from it not just git.

Best Wishes
Phillip
Previous: Ævar Arnfjörð BjarmasonNext: Ævar Arnfjörð Bjarmason
Message 52 of 55 in “The git spring cleanup challenge”
  1. Felipe ContrerasJun 1, 2021
  2. AndyJun 1, 2021
  3. Felipe ContrerasJun 1, 2021
  4. Đoàn Trần Công DanhJun 1, 2021
  5. Felipe ContrerasJun 1, 2021
  6. Đoàn Trần Công DanhJun 1, 2021
  7. Felipe ContrerasJun 1, 2021
  8. Đoàn Trần Công DanhJun 1, 2021
  9. Felipe ContrerasJun 1, 2021
  10. Đoàn Trần Công DanhJun 2, 2021
  11. Felipe ContrerasJun 2, 2021
  12. Ævar Arnfjörð BjarmasonJun 3, 2021
  13. Felipe ContrerasJun 3, 2021
  14. Sergey OrganovJun 3, 2021
  15. Ævar Arnfjörð BjarmasonJun 3, 2021
  16. Felipe ContrerasJul 2, 2021
  17. Ævar Arnfjörð BjarmasonJul 2, 2021
  18. Felipe ContrerasJul 2, 2021
  19. David AguilarJun 1, 2021
  20. Junio C HamanoJun 1, 2021
  21. Junio C HamanoJun 1, 2021
  22. Felipe ContrerasJun 1, 2021
  23. Johannes SixtJun 2, 2021
  24. Felipe ContrerasJun 2, 2021
  25. Junio C HamanoJun 2, 2021
  26. Felipe ContrerasJun 2, 2021
  27. Đoàn Trần Công DanhJun 2, 2021
  28. Johannes SixtJun 2, 2021
  29. Felipe ContrerasJun 1, 2021
  30. Sergey OrganovJun 2, 2021
  31. Junio C HamanoJun 3, 2021
  32. Sergey OrganovJun 3, 2021
  33. Sergey OrganovJun 1, 2021
  34. Felipe ContrerasJun 1, 2021
  35. Sergey OrganovJun 2, 2021
  36. Felipe ContrerasJun 2, 2021
  37. Sergey OrganovJun 2, 2021
  38. Felipe ContrerasJun 2, 2021
  39. Sergey OrganovJun 2, 2021
  40. Junio C HamanoJun 3, 2021
  41. Felipe ContrerasJun 3, 2021
  42. Elijah NewrenJun 3, 2021
  43. Felipe ContrerasJun 3, 2021
  44. Elijah NewrenJun 3, 2021
  45. Felipe ContrerasJun 3, 2021
  46. Sergey OrganovJun 3, 2021
  47. Bagas SanjayaJun 2, 2021
  48. Felipe ContrerasJun 2, 2021
  49. Ævar Arnfjörð BjarmasonJun 3, 2021
  50. Felipe ContrerasJun 3, 2021
  51. Ævar Arnfjörð BjarmasonJun 3, 2021
  52. Phillip WoodJun 3, 2021
  53. Ævar Arnfjörð BjarmasonJun 3, 2021
  54. Phillip WoodJun 4, 2021
  55. Felipe ContrerasJun 3, 2021

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