show-ref: accept HEAD with --verify

Previously, when --verify was specified, show-ref would use a separate
code path which did not handle HEAD and treated it as an invalid
ref. Thus, "git show-ref --verify HEAD" (where "--verify" is used
because the user is not interested in seeing refs/remotes/origin/HEAD)
did not work as expected.

Instead of insisting that the input begins with "refs/", allow "HEAD"
as well in the codepath that handles "--verify", so that all valid
full refnames including HEAD are passed to the same output machinery.

Signed-off-by: Vladimir Panteleev <git@thecybershadow.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/show-ref.c b/builtin/show-ref.c
index 6d4e669..0e53e3d 100644 (file)
--- a/builtin/show-ref.c
+++ b/builtin/show-ref.c
@@ -202,7 +202,7 @@ int cmd_show_ref(int argc, const char **argv, const char *prefix)
                while (*pattern) {
                        struct object_id oid;
 
-                       if (starts_with(*pattern, "refs/") &&
+                       if ((starts_with(*pattern, "refs/") || !strcmp(*pattern, "HEAD")) &&
                            !read_ref(*pattern, oid.hash)) {
                                if (!quiet)
                                        show_one(*pattern, &oid);

diff --git a/t/t1403-show-ref.sh b/t/t1403-show-ref.sh
index 7e10bcf..5932bea 100755 (executable)
--- a/t/t1403-show-ref.sh
+++ b/t/t1403-show-ref.sh
@@ -164,4 +164,15 @@ test_expect_success 'show-ref --heads, --tags, --head, pattern' '
        test_cmp expect actual
 '
 
+test_expect_success 'show-ref --verify HEAD' '
+       echo $(git rev-parse HEAD) HEAD >expect &&
+       git show-ref --verify HEAD >actual &&
+       test_cmp expect actual &&
+
+       >expect &&
+
+       git show-ref --verify -q HEAD >actual &&
+       test_cmp expect actual
+'
+
 test_done