Re: [PATCH] update-index: add --swap to swap index and worktree content

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On Wed, Aug 17, 2011 at 9:13 PM, Martin von Zweigbergk
<martin.von.zweigbergk@xxxxxxxxx> wrote:
> Hi,
>
> On Tue, Aug 16, 2011 at 10:17 PM, Jeff King <peff@xxxxxxxx> wrote:
>> On Wed, Aug 17, 2011 at 09:11:32AM +0700, Nguyen Thai Ngoc Duy wrote:
>>
>>> Two reasons. I already mentioned the ability to quickly checkout index
>>> for a quick test (though there could be more problems down that road).
>>
>> That's a good thought. However, in practice, I find I also need other
>> files from the index to do a successful test. So I end up just
>> committing what I think is right, and then afterwards do:
>
> Maybe a stupid question, but "update-index --swap" would swap all
> files, right? So what "other files from the index" would there be?

That's some of the "problems down that road", another one being
removed files in index. Still the ability to do a quick compile on a
single file is cool.

> Maybe the above shows that I'm missing something. Still, would it be
> possible to achieve the use case with something like the following?
>
> git stash --keep-index
> # fix up files, test etc.
> git add ....
> git commit
> git cherry-pick --strategy=theirs stash && git stash drop

Pretty much (if I understand git-stash correctly, I haven't used it
much), except that if I change my mind mid way, I can switch back to
the original state and keep working:

1. git add -p ...
2. git update-index --swap foo # index <-> wt
3. # make some minor edit, "make foo.o", oops failed, I missed some hunks
4. git checkout -p ...
5. # still not happy, more changes should be made on both index and wt
6. git update-index --swap foo # now index is index, wt is wt
7. # edit some more, when ready to commit, repeat steps 2-6 again
8. git commit
-- 
Duy
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