t5616: use rev-parse instead to get HEAD's object_id

Only HEAD's object_id is necessary, rev-list is an overkill.

Despite POSIX requires grep(1) treat single pattern with <newline>
as multiple patterns.
busybox's grep(1) (as of v1.31.1) haven't implemented it yet.

Use rev-parse to simplify the test and avoid busybox unimplemented
features.

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh
index 77bb91e97692272b572cd0dd89053e0bb8c7e050..09e640cae40f2a31198de78ff67669eeca7cf20c 100755 (executable)
--- a/t/t5616-partial-clone.sh
+++ b/t/t5616-partial-clone.sh
@@ -49,7 +49,7 @@ test_expect_success 'do partial clone 1' '
 test_expect_success 'verify that .promisor file contains refs fetched' '
        ls pc1/.git/objects/pack/pack-*.promisor >promisorlist &&
        test_line_count = 1 promisorlist &&
-       git -C srv.bare rev-list HEAD >headhash &&
+       git -C srv.bare rev-parse --verify HEAD >headhash &&
        grep "$(cat headhash) HEAD" $(cat promisorlist) &&
        grep "$(cat headhash) refs/heads/master" $(cat promisorlist)
 '