Re: Git branch outputs usage message on stderr

[Junio C Hamano <gitster@pobox.com>]

Jeff King <peff@peff.net> writes:

> And it uses code 129, even for "-h". I don't see any explicit rationale
> for that in the history; I think it goes back to the beginning of
> parse-options. It happens via the PARSE_OPT_HELP flag, but curiously we
> also trigger that for ambiguous options (which should exit with error).
> That might be a bug-in-waiting if we start handling PARSE_OPT_HELP
> differently.

There is another class of callers that are protected by the same
"argc == 2 && !strcmp(argv[1], "-h")" condition, and they call
usage.c:usage(), instead of calling usage_with_options().  These
calls (but not all calls to usage()) need to be updated to use a
similar helper, say, show_usage_and_exit_if_asked().  Sigh...