[PATCHv4] transport: Catch non positive --depth option value

["\"Andrés G. Aragoneses\"" <knocte@gmail.com>]

>From 4f3b24379090b7b69046903fba494f3191577b20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9s=20G=2E=20Aragoneses?= <knocte@gmail.com>
Date: Tue, 26 Nov 2013 12:38:19 +0100
Subject: [PATCH] transport: Catch non positive --depth option value

Instead of simply ignoring the value passed to --depth
option when it is zero or negative, now it is caught
and reported.

This will let people know that they were using the
option incorrectly (as depth<0 should be simply invalid,
and under the hood depth==0 didn't have any effect).

(The change in fetch.c is needed to avoid the tests
failing because of this new restriction.)

Signed-off-by: Andres G. Aragoneses <knocte@gmail.com>
Reviewed-by: Duy Nguyen <pclouds@gmail.com>
---
 builtin/fetch.c | 2 +-
 transport.c     | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/builtin/fetch.c b/builtin/fetch.c
index bd7a101..88c04d7 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -770,7 +770,7 @@ static void backfill_tags(struct transport *transport, struct ref *ref_map)
 	}
 
 	transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
-	transport_set_option(transport, TRANS_OPT_DEPTH, "0");
+	transport_set_option(transport, TRANS_OPT_DEPTH, NULL);
 	fetch_refs(transport, ref_map);
 
 	if (gsecondary) {
diff --git a/transport.c b/transport.c
index 7202b77..5b42ccb 100644
--- a/transport.c
+++ b/transport.c
@@ -483,6 +483,8 @@ static int set_git_option(struct git_transport_options *opts,
 			opts->depth = strtol(value, &end, 0);
 			if (*end)
 				die("transport: invalid depth option '%s'", value);
+			if (opts->depth < 1)
+				die("transport: invalid depth option '%s' (must be positive)", value);
 		}
 		return 0;
 	}
-- 
1.8.1.2