tag: mark "--message" option with NONEG

We do not allow "--no-message" to work now, as the option callback
returns "-1" when it sees a NULL arg. However, that will cause
parse-options to exit(129) without printing anything further, leaving
the user confused about what happened.

Instead, let's explicitly mark it as PARSE_OPT_NONEG, which will give a
useful error message (and print the usual -h output).

In theory this could be used to override an earlier "-m", but it's not
clear how it would interact with other message options (e.g., would it
also clear data read for "-F"?). Since it's already disabled and nobody
is asking for it, let's punt on that and just improve the error message.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/tag.c b/builtin/tag.c
index f6236321865773cb60907bfe8b56d96bbaf3e83a..6a396a5090f1e6cf0ed73f001a6bef006789b26f 100644 (file)
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -390,8 +390,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                OPT_GROUP(N_("Tag creation options")),
                OPT_BOOL('a', "annotate", &annotate,
                                        N_("annotated tag, needs a message")),
-               OPT_CALLBACK('m', "message", &msg, N_("message"),
-                            N_("tag message"), parse_msg_arg),
+               { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
+                 N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg },
                OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
                OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
                OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),