parse-options: report uncorrupted multi-byte options

Because our command-line parser considers only one byte at the time
for short-options, we incorrectly report only the first byte when
multi-byte input was provided. This makes user-errors slightly
awkward to diagnose for instance under UTF-8 locale and non-English
keyboard layouts.

Report the whole argument-string when a non-ASCII short-option is
detected.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Improved-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/parse-options.c b/parse-options.c
index c1c66bd408c50685c06fe7ff1e1c6a78c26be1b1..052bf72bb88963cf81bb2303c0ab2354a2125617 100644 (file)
--- a/parse-options.c
+++ b/parse-options.c
@@ -470,8 +470,11 @@ int parse_options(int argc, const char **argv, const char *prefix,
        default: /* PARSE_OPT_UNKNOWN */
                if (ctx.argv[0][1] == '-') {
                        error("unknown option `%s'", ctx.argv[0] + 2);
-               } else {
+               } else if (isascii(*ctx.opt)) {
                        error("unknown switch `%c'", *ctx.opt);
+               } else {
+                       error("unknown non-ascii option in string: `%s'",
+                             ctx.argv[0]);
                }
                usage_with_options(usagestr, options);
        }