Re: [PATCH/RFC 0/3] git rerere unresolve file

[Johannes Sixt <j6t@kdbg.org>]

On Sonntag, 22. November 2009, Junio C Hamano wrote:
> Johannes Sixt <j6t@kdbg.org> writes:
> > ... But
> > there is no other way to remove an incorrect resolution short of purging
> > the whole rr-cache.
>
> No, no no, no.  You do not have to.

Oh, yeah, I know. But even for people who know how to drive plumbing commands, 
this:

> "ls -t1 .git/rr-cache/*/thisimage | head"
> would be one way to manually find out which one it is.

does not count as "you can" in my book. ;) It assumes that there are at most a 
handful conflicted files. In my case, for example, I have to fix a merge 
where there are ~100 conflicted files.

>  * Then the user tells rerere that "this is the corrected resolution",
>    perhaps
>
>    $ git rerere update Documentation/git-commit.txt
>
>    This will
>
>    - Internally recompute the original conflicted state, i.e. run
>      "checkout --conflict=merge Documentation/git-commit.txt" in-core;
>
>    - feed it to rerere.c::handle_file() to learn the conflict hash;
>
>    - read the user's updated resolution from the work tree, and update
>      "postimage" with it.
>
> ...
>
> The "forget" subcommand may be useful, but the real implementation should
> be the first half of the "update", iow, recreate conflict in-core in order
> to compute the conflict hash, and drop existing "postimage", without
> replacing it from the work tree.  We should leave it up to the user using
> "checkout --conflict" to reproduce the conflict in the work tree.

Thank you for your elaborate feedback and the guidelines about how to move 
forward.

I actually think that 'forget' should be the primary subcommand. Because after 
the postimage was purged, the next implicit or explicit 'git rerere' will 
record the resolution anyway. I'll see what I can do.

-- Hannes