From 8547e0f17697affd24d7a185245f0442af246f40 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Wed, 24 Dec 2014 01:18:11 +0100
Subject: [PATCH] commit-tree: simplify parsing of option -S using
 skip_prefix()

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/commit-tree.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/builtin/commit-tree.c b/builtin/commit-tree.c
index 8a66c74e0f..25aa2cdef3 100644
--- a/builtin/commit-tree.c
+++ b/builtin/commit-tree.c
@@ -66,10 +66,8 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			continue;
 		}
 
-		if (!memcmp(arg, "-S", 2)) {
-			sign_commit = arg + 2;
+		if (skip_prefix(arg, "-S", &sign_commit))
 			continue;
-		}
 
 		if (!strcmp(arg, "--no-gpg-sign")) {
 			sign_commit = NULL;