Show usage string for 'git unpack-file -h'

"unpack-file -h" could be asking to save the contents of a blob
named "-h".  Strictly speaking, such a pathological ref name is
possible, but the user would have to had said something like
"tags/-h" to name such a pathological ref already.  When used in
scripts, unpack-file is typically not passed a user-supplied tag
name directly.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/unpack-file.c b/unpack-file.c
index ac9cbf7cd8ed1367151de0e8b96668f498b7f1a1..e9d8934691822ad81a4c32481d82790e9d7ca5b0 100644 (file)
--- a/unpack-file.c
+++ b/unpack-file.c
@@ -28,7 +28,7 @@ int main(int argc, char **argv)
 
        git_extract_argv0_path(argv[0]);
 
-       if (argc != 2)
+       if (argc != 2 || !strcmp(argv[1], "-h"))
                usage("git unpack-file <sha1>");
        if (get_sha1(argv[1], sha1))
                die("Not a valid object name %s", argv[1]);