[PATCH v2] fetch-pack: check for shallow if depth given

[Mike Edgar <adgar@google.com>]

When a repository is first fetched as a shallow clone, either by
git-clone or by fetching into an empty repo, the server's capabilities
are not currently consulted. The client will send shallow requests even
if the server does not understand them, and the resulting error may be
unhelpful to the user. This change pre-emptively checks so we can exit
with a helpful error if necessary.

Signed-off-by: Mike Edgar <adgar@google.com>
Acked-by: Jeff King <peff@peff.net>
---
 fetch-pack.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fetch-pack.c b/fetch-pack.c
index 48526aa..849a9d6 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -790,7 +790,7 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
 	sort_ref_list(&ref, ref_compare_name);
 	qsort(sought, nr_sought, sizeof(*sought), cmp_ref_by_name);
 
-	if (is_repository_shallow() && !server_supports("shallow"))
+	if ((args->depth > 0 || is_repository_shallow()) && !server_supports("shallow"))
 		die("Server does not support shallow clients");
 	if (server_supports("multi_ack_detailed")) {
 		if (args->verbose)
-- 
2.4.3.573.g4eafbef