Re: [PATCH] mergetool: don't skip modify/remove conflicts

[Martin von Zweigbergk <martin.von.zweigbergk@gmail.com>]

On Wed, 9 Feb 2011, Junio C Hamano wrote:

> Martin von Zweigbergk <martin.von.zweigbergk@gmail.com> writes:
> 
> > +extern void *RERERE_UTIL_STAGED;
> 
> This is for what kind?  The contents on the filesystem is ready to go,
> added to the index, but still in MERGE_RR (i.e. "git rerere" not run yet)?

Correct.

> Is the real problem that git-mergetool is not running rerere when it
> should, I wonder...

You mean that maybe it should call rerere for files that are added to
the index?

> >  		it = string_list_insert(conflict, (const char *)e->name);
> > -		it->util = NULL;
> > +		it->util = RERERE_UTIL_PUNTED;
> >  		if (ce_stage(e) == 1) {
> > +			it->util = RERERE_UTIL_STAGED;
> 
> Hmm, I thought that you were taling about paths that the user
> hand-resolved and then ran "git add" on.  Why is this marked "STAGED"?

Very good question. It shouldn't.

> Either your logic is wrong, or the name of the symbol is.

The former. What I really wanted to check is if the file has been
added to the index. I am currently struggling with how to do this
correctly. My inexperience with the git internals makes it a very slow
process with a lot of guesses and trial and error.

> > -		if (!conflict.items[i].util)
> > -			continue; /* punted */
> > +		if (conflict.items[i].util == RERERE_UTIL_PUNTED ||
> > +			conflict.items[i].util == RERERE_UTIL_STAGED)
> > +			continue;
> 
> There are a few repetition of "if it is marked with PUNTED or STAGED"; can
> you make it into a small helper function and give it a _meaningful_ name?
> What does it mean for an entry to be marked with either of these marks?

There is another big problem here. I had not realized that the util
field would be freed later (being spoilt by GCing languages, I guess)
and that will of course fail if it is one of the two constants I
defined. I stupidly did not run the commands manually, but relied only
on the test cases, so I didn't notice the segfault at the end. Somehow
all the test cases still pass.

I think this means that anyone intending to run rerere should not
build pu at the moment, right? I'm really sorry about the
inconvenience :-(. 

/Martin