From: Konstantin Tokarev <annulen@yandex.ru>
To: Elijah Newren <newren@gmail.com>
Cc: Git Mailing List <git@vger.kernel.org>
Subject: Re: Git Merge 2020 slides and reproducibility
Date: Sat, 07 Mar 2020 22:38:36 +0300 [thread overview]
Message-ID: <3207561583597253@iva2-fa9fd5fad11f.qloud-c.yandex.net> (raw)
In-Reply-To: CABPp-BECOarg+G-_oz83i0EuKuypJQA=wyjnfG4U0heG=0L0hg@mail.gmail.com
07.03.2020, 19:03, "Elijah Newren" <newren@gmail.com>:
> On Sat, Mar 7, 2020 at 5:38 AM Konstantin Tokarev <annulen@yandex.ru> wrote:
>> 06.03.2020, 18:00, "Elijah Newren" <newren@gmail.com>:
>> > Hi,
>> >
>> > Had a few different folks ask me at Git Merge about slides for my
>> > talk. I said I'd post them on github somewhere, but in case you were
>> > one of the folks and have a hard time finding it...they are up at
>> > https://github.com/newren/presentations/blob/pdfs/merge-performance/merge-performance-slides.pdf
>> > and steps to reproduce the speedups I got can be found at
>> > https://github.com/newren/git/blob/git-merge-2020-demo/README.md
>> > (though be forewarned that the code is has lots of fixmes & ifdefs &
>> > other problems, has awful commit messages, etc.; I will be cleaning it
>> > up soon).
>>
>> Hello, I've just tried your branch on my repository and it seems like it can
>> be a salvation from all rename-related pain that I'm regularly facing when
>> doing merges and cherry-picks! Thank you very much, I hope it will be
>> integrated into mainline soon.
>
> Wow, thanks for trying it out. Please note that while it _might_ be
> okay to use for real work, I am not that confident that it is.
Do not worry, I've made full copy of repo before trying anything.
> There
> are a number of factors making the 'demo' label I gave it a rather
> fitting one:
>
> * I only started using it personally on a real world repository (or
> two) about a week and a half ago. (Before then, I knew merge-ort
> didn't work.)
> * The second real world repo I used it on uncovered a bug in my code
> that the testsuite didn't catch[1]
> * Although I've tested with two real world repos now, that testing
> was very minimal; I was focused on getting the demo ready and
> implementing as many optimizations as I could.
> * While the outer merge, rebase, and cherry-pick commands will
> accept a bunch of merge-machinery options and pass them along,
> merge-ort flat ignores them all.
> * merge-ort is hardcoded for merge.directoryRenames=true, when the
> default should be merge.directoryRenames=conflict
directoryRenames=true is actually one of features which I was badly
missing and somehow overlooked.
> * it has a bunch of FIXMEs, some of which are code cleanliness
> issues but some of which represent minor bugs
>
> [1] https://lore.kernel.org/git/911de63afa274b0791e4d4252934a5e9b0031f10.1582762465.git.gitgitgadget@gmail.com/
>
> Also...
>
>> However, when testing my previous merges which had to be done with helper
>> script, I've encountered case of
>>
>> CONFLICT (directory rename split)
>>
>> Is there any way to prevent conflict in this case if files are the same, and
>> merge their contents if there are differences? I think it would be reasonable
>> to assume that move done in newest commit should win, and allow user
>> to change strategy via command line option, provide explicit hint where files
>> should be moved, or maybe even decide it interactively.
>
> This conflict message is known to trigger in some cases where it
> shouldn't; it may be that you're just experiencing annoyance from
> that. Let me fix that issue before worrying about workarounds.
Well, in my case a directory of files was moved path A in one of merged heads
and to path B in another, so I guess it was legitimate.
Are you going to continue development in the same branch?
When do you expect it to be ready for review?
--
Regards,
Konstantin
next prev parent reply other threads:[~2020-03-07 19:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-06 15:00 Git Merge 2020 slides and reproducibility Elijah Newren
2020-03-06 16:40 ` Derrick Stolee
2020-03-06 18:25 ` Matheus Tavares Bernardino
2020-03-07 13:38 ` Konstantin Tokarev
2020-03-07 16:03 ` Elijah Newren
2020-03-07 19:38 ` Konstantin Tokarev [this message]
2020-03-09 15:50 ` Elijah Newren
2020-03-10 14:36 ` Konstantin Tokarev
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