[PATCH] rm: resolving by removal is not a warning-worthy event

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

When resolving a conflict on a path in favor of removing it, using
"git rm" on it is the standard way to do so.  The user however is
greeted with a "needs merge" message during that operation:

	$ git merge side-branch
	$ edit conflicted-path-1
	$ git add conflicted-path-1
	$ git rm conflicted-path-2
	conflicted-path-2: needs merge
	rm 'conflicted-path-2'

The removal by "git rm" does get performed, but an uninitiated user
may find it confusing, "needs merge? so I need to resolve conflict
before being able to remove it???"

The message is coming from "update-index --refresh" that is called
internally to make sure "git rm" knows which paths are clean and
which paths are dirty, in order to prevent removal of paths modified
relative to the index without the "-f" option.  We somehow ended up
not squelching this message which seeped through to the UI surface.

Use the same mechanism used by "git commit", "git describe", etc. to
squelch the message.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/rm.c  |  2 +-
 t/t3600-rm.sh | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/builtin/rm.c b/builtin/rm.c
index 65b448ef8e..b63c86ae92 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -272,7 +272,7 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
 	parse_pathspec(&pathspec, 0,
 		       PATHSPEC_PREFER_CWD,
 		       prefix, argv);
-	refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);
+	refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, &pathspec, NULL, NULL);
 
 	seen = xcalloc(pathspec.nr, 1);
 
diff --git a/t/t3600-rm.sh b/t/t3600-rm.sh
index b8fbdefcdc..5aae78ccc4 100755
--- a/t/t3600-rm.sh
+++ b/t/t3600-rm.sh
@@ -251,6 +251,19 @@ test_expect_success 'choking "git rm" should not let it die with cruft' '
 	test_path_is_missing .git/index.lock
 '
 
+test_expect_success 'Resolving by removal is not a warning-worthy event' '
+	git reset -q --hard &&
+	test_when_finished "rm -f .git/index.lock msg && git reset -q --hard" &&
+	qfwfq=$(echo qfwfq | git hash-object -w --stdin) &&
+	for stage in 1 2 3
+	do
+		echo "100644 $qfwfq $stage	qfwfq"
+	done | git update-index --index-info &&
+	git rm qfwfq >msg &&
+	test_i18ngrep ! "needs merge" msg &&
+	test_must_fail git ls-files -s --error-unmatch qfwfq
+'
+
 test_expect_success 'rm removes subdirectories recursively' '
 	mkdir -p dir/subdir/subsubdir &&
 	echo content >dir/subdir/subsubdir/file &&
-- 
2.22.0-653-g37fc7794bc