Re: git-name-rev off-by-one bug

[Junio C Hamano <junkio@cox.net>]

Junio C Hamano <junkio@cox.net> writes:

> Linus Torvalds <torvalds@osdl.org> writes:
>
>> Whaddaya think? I really like it.
>
> Yes.  Maybe split this into 3 pieces.  I do not want to waste
> your time with that, so will take the liberty to do so myself,
> with appropriate commit log messages, if you do not mind.
>
>  1. give diff-files -[012] flags.
>  2. merge-one-file leaves unmerged index entries.
>  3. always use -M -p in git-diff.
>
> I do not have any issue against #1.

Actually there is one.  If we are asked to do diff -1 and an
unmerged path does not have stage #2 but stage #1 entry exists,
we would end up showing that stage #1, without telling the user
that we are showing something different from what was asked.
How about doing something like this, on top of yours?

--- diff-files.c
+++ diff-files.c
@@ -117,8 +117,11 @@
 			 */
 			i--;
 			/*
-			 * Show the diff for the 'ce' we chose
+			 * Show the diff for the 'ce' if we found the one
+			 * from the desired stage.
 			 */
+			if (ce_stage(ce) != diff_unmerged_stage)
+				continue;
 		}
 
 		if (lstat(ce->name, &st) < 0) {