Function cmd_parseopt

builtin/rev-parse.c:429–567

}

static int cmd_parseopt(int argc, const char **argv, const char *prefix)
{
	int keep_dashdash = 0, stop_at_non_option = 0;
	char const * const parseopt_usage[] = {
		N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
		NULL
	};
	struct option parseopt_opts[] = {
		OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
					N_("keep the `--` passed as an arg")),
		OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
					N_("stop parsing after the "
					   "first non-option argument")),
		OPT_BOOL(0, "stuck-long", &stuck_long,
					N_("output in stuck long form")),
		OPT_END(),
	};
	struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
	struct strvec longnames = STRVEC_INIT;
	struct strvec usage = STRVEC_INIT;
	struct option *opts = NULL;
	size_t opts_nr = 0, opts_alloc = 0;

	strbuf_addstr(&parsed, "set --");
	argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
	                     PARSE_OPT_KEEP_DASHDASH);
	if (argc < 1 || strcmp(argv[0], "--"))
		usage_with_options(parseopt_usage, parseopt_opts);

	/* get the usage up to the first line with a -- on it */
	for (;;) {
		strbuf_reset(&sb);
		if (strbuf_getline(&sb, stdin) == EOF)
			die(_("premature end of input"));
		if (!strcmp("--", sb.buf)) {
			if (!usage.nr)
				die(_("no usage string given before the `--' separator"));
			break;
		}

		strvec_push(&usage, sb.buf);
	}

	/* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
	while (strbuf_getline(&sb, stdin) != EOF) {
		const char *s;
		char *help;
		struct option *o;

		if (!sb.len)
			continue;

		ALLOC_GROW(opts, opts_nr + 1, opts_alloc);
		memset(opts + opts_nr, 0, sizeof(*opts));

		o = &opts[opts_nr++];
		help = findspace(sb.buf);
		if (!help || sb.buf == help) {