From 03c5c10263fb0d80151d108a4c61253e1d0a8de6 Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Mon, 9 Nov 2009 09:04:55 -0600
Subject: [PATCH] Show usage string for 'git show-index -h'

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 show-index.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/show-index.c b/show-index.c
index 45bb53577..63f9da532 100644
--- a/show-index.c
+++ b/show-index.c
@@ -1,6 +1,9 @@
 #include "cache.h"
 #include "pack.h"
 
+static const char show_index_usage[] =
+"git show-index < <packed archive index>";
+
 int main(int argc, char **argv)
 {
 	int i;
@@ -8,6 +11,8 @@ int main(int argc, char **argv)
 	unsigned int version;
 	static unsigned int top_index[256];
 
+	if (argc != 1)
+		usage(show_index_usage);
 	if (fread(top_index, 2 * 4, 1, stdin) != 1)
 		die("unable to read header");
 	if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {
-- 
2.26.2