mktree: do not barf on a submodule commit

It is perfectly normal if a tree entry points at a missing commit as long
as the mode of the entry says it is a submodule.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-mktree.c b/builtin-mktree.c
index 133ab4b0f88aac70a78bd0f3382672236a1bd174..17cdb3d63a79cbf113151d53b6d2bf280a1045a3 100644 (file)
--- a/builtin-mktree.c
+++ b/builtin-mktree.c
@@ -89,9 +89,16 @@ static void mktree_line(char *buf, size_t len, int line_termination)
            ntr[41] != '\t' ||
            get_sha1_hex(ntr + 1, sha1))
                die("input format error: %s", buf);
-       type = sha1_object_info(sha1, NULL);
+
+       /* It is perfectly normal if we do not have a commit from a submodule */
+       if (!S_ISGITLINK(mode))
+               type = sha1_object_info(sha1, NULL);
+       else
+               type = OBJ_COMMIT;
+
        if (type < 0)
                die("object %s unavailable", sha1_to_hex(sha1));
+
        *ntr++ = 0; /* now at the beginning of SHA1 */
        if (type != type_from_string(ptr))
                die("object type %s mismatch (%s)", ptr, typename(type));