submodule update --init: display correct path from submodule

In the submodule helper we did not correctly handled the display path
for initializing submodules when both the submodule is inside a
subdirectory as well as the command being invoked from a subdirectory
(as viewed from the superproject).

This was broken in 3604242f080, which was written at a time where
there was no super-prefix available, so we abused the --prefix option
for the same purpose and could get only one case right (the call from
within a subdirectory, not the submodule being in a subdirectory).

Test-provided-by: David Turner <novalis@novalis.org>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index 64f322c4cc..725bbed1f8 100755
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -140,6 +140,23 @@ test_expect_success 'submodule update --init --recursive from subdirectory' '
 	test_i18ncmp expect2 actual2
 '
 
+cat <<EOF >expect2
+Submodule 'foo/sub' ($pwd/withsubs/../rebasing) registered for path 'sub'
+EOF
+
+test_expect_success 'submodule update --init from and of subdirectory' '
+	git init withsubs &&
+	(cd withsubs &&
+	 mkdir foo &&
+	 git submodule add "$(pwd)/../rebasing" foo/sub &&
+	 (cd foo &&
+	  git submodule deinit -f sub &&
+	  git submodule update --init sub 2>../../actual2
+	 )
+	) &&
+	test_i18ncmp expect2 actual2
+'
+
 apos="'";
 test_expect_success 'submodule update does not fetch already present commits' '
 	(cd submodule &&