grep: do not use --index in the short usage output

Utilize the PARSE_OPT_NEGHELP option to show --no-index in the usage
generated by parse-options.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-grep.c b/builtin-grep.c
index 0ef849cb84650705ffc840aed8a3fcedbeb48f9a..e3eeb77cc789796d659cbd9eb28af189bdcf4ee4 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -762,8 +762,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
        struct option options[] = {
                OPT_BOOLEAN(0, "cached", &cached,
                        "search in index instead of in the work tree"),
-               OPT_BOOLEAN(0, "index", &use_index,
-                       "--no-index finds in contents not managed by git"),
+               { OPTION_BOOLEAN, 0, "index", &use_index, NULL,
+                       "finds in contents not managed by git",
+                       PARSE_OPT_NOARG | PARSE_OPT_NEGHELP },
                OPT_GROUP(""),
                OPT_BOOLEAN('v', "invert-match", &opt.invert,
                        "show non-matching lines"),