[PATCH] add -u: do not fail to resolve a path as deleted

[Junio C Hamano <gitster@pobox.com>]

After you resolve a conflicted merge to remove the path, "git add -u"
failed to record the removal.  Instead it errored out by saying that the
removed path is not found in the work tree, but that is what the user
wanted to do and failing it is illogical.

This fixes it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 read-cache.c          |    5 +++++
 t/t2200-add-update.sh |   20 +++++++++++++++++++-
 2 files changed, 24 insertions(+), 1 deletions(-)

diff --git a/read-cache.c b/read-cache.c
index b1475ff..ddc0586 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1574,6 +1574,11 @@ static void update_callback(struct diff_queue_struct *q,
 		default:
 			die("unexpected diff status %c", p->status);
 		case DIFF_STATUS_UNMERGED:
+			/*
+			 * diff-files gives U followed by the work tree state
+			 * such as M or D, so we can ignore this.
+			 */
+			continue;
 		case DIFF_STATUS_MODIFIED:
 		case DIFF_STATUS_TYPE_CHANGED:
 			if (add_file_to_index(&the_index, path, data->flags)) {
diff --git a/t/t2200-add-update.sh b/t/t2200-add-update.sh
index cd9231c..e917a01 100755
--- a/t/t2200-add-update.sh
+++ b/t/t2200-add-update.sh
@@ -12,7 +12,7 @@ and issues a git add -u with path limiting on "dir" to add
 only the updates to dir/sub.
 
 Also tested are "git add -u" without limiting, and "git add -u"
-without contents changes.'
+without contents changes, and other conditions'
 
 . ./test-lib.sh
 
@@ -128,4 +128,22 @@ test_expect_success 'add -n -u should not add but just report' '
 
 '
 
+test_expect_success 'add -u resolves unmerged paths' '
+	git reset --hard &&
+	one=$(echo 1 | git hash-object -w --stdin) &&
+	two=$(echo 2 | git hash-object -w --stdin) &&
+	three=$(echo 3 | git hash-object -w --stdin) &&
+	for path in path1 path2
+	do
+		echo "100644 $one 1	$path"
+		echo "100644 $two 2	$path"
+		echo "100644 $three 3	$path"
+	done |
+	git update-index --index-info &&
+	echo 4 >path1 &&
+	git add -u &&
+	test 1 = "$(git ls-files path1 path2 | wc -l)"
+'
+
 test_done
+
-- 
1.6.1.1.278.g6a817