[thirdparty/git.git] / parse-options.c

#include "git-compat-util.h"
#include "parse-options.h"

#define OPT_SHORT 1
#define OPT_UNSET 2

struct optparse_t {
	const char **argv;
	int argc;
	const char *opt;
};

static inline const char *get_arg(struct optparse_t *p)
{
	if (p->opt) {
		const char *res = p->opt;
		p->opt = NULL;
		return res;
	}
	p->argc--;
	return *++p->argv;
}

static inline const char *skip_prefix(const char *str, const char *prefix)
{
	size_t len = strlen(prefix);
	return strncmp(str, prefix, len) ? NULL : str + len;
}

static int opterror(const struct option *opt, const char *reason, int flags)
{
	if (flags & OPT_SHORT)
		return error("switch `%c' %s", opt->short_name, reason);
	if (flags & OPT_UNSET)
		return error("option `no-%s' %s", opt->long_name, reason);
	return error("option `%s' %s", opt->long_name, reason);
}

static int get_value(struct optparse_t *p,
                     const struct option *opt, int flags)
{
	const char *s, *arg;
	const int unset = flags & OPT_UNSET;

	if (unset && p->opt)
		return opterror(opt, "takes no value", flags);
	if (unset && (opt->flags & PARSE_OPT_NONEG))
		return opterror(opt, "isn't available", flags);

	if (!(flags & OPT_SHORT) && p->opt) {
		switch (opt->type) {
		case OPTION_CALLBACK:
			if (!(opt->flags & PARSE_OPT_NOARG))
				break;
			/* FALLTHROUGH */
		case OPTION_BOOLEAN:
		case OPTION_BIT:
		case OPTION_SET_INT:
		case OPTION_SET_PTR:
			return opterror(opt, "takes no value", flags);
		default:
			break;
		}
	}

	arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL);
	switch (opt->type) {
	case OPTION_BIT:
		if (unset)
			*(int *)opt->value &= ~opt->defval;
		else
			*(int *)opt->value |= opt->defval;
		return 0;

	case OPTION_BOOLEAN:
		*(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
		return 0;

	case OPTION_SET_INT:
		*(int *)opt->value = unset ? 0 : opt->defval;
		return 0;

	case OPTION_SET_PTR:
		*(void **)opt->value = unset ? NULL : (void *)opt->defval;
		return 0;

	case OPTION_STRING:
		if (unset) {
			*(const char **)opt->value = NULL;
			return 0;
		}
		if (opt->flags & PARSE_OPT_OPTARG && (!arg || *arg == '-')) {
			*(const char **)opt->value = (const char *)opt->defval;
			return 0;
		}
		if (!arg)
			return opterror(opt, "requires a value", flags);
		*(const char **)opt->value = get_arg(p);
		return 0;

	case OPTION_CALLBACK:
		if (unset)
			return (*opt->callback)(opt, NULL, 1);
		if (opt->flags & PARSE_OPT_NOARG)
			return (*opt->callback)(opt, NULL, 0);
		if (opt->flags & PARSE_OPT_OPTARG && (!arg || *arg == '-'))
			return (*opt->callback)(opt, NULL, 0);
		if (!arg)
			return opterror(opt, "requires a value", flags);
		return (*opt->callback)(opt, get_arg(p), 0);

	case OPTION_INTEGER:
		if (unset) {
			*(int *)opt->value = 0;
			return 0;
		}
		if (opt->flags & PARSE_OPT_OPTARG && (!arg || !isdigit(*arg))) {
			*(int *)opt->value = opt->defval;
			return 0;
		}
		if (!arg)
			return opterror(opt, "requires a value", flags);
		*(int *)opt->value = strtol(get_arg(p), (char **)&s, 10);
		if (*s)
			return opterror(opt, "expects a numerical value", flags);
		return 0;

	default:
		die("should not happen, someone must be hit on the forehead");
	}
}

static int parse_short_opt(struct optparse_t *p, const struct option *options)
{
	for (; options->type != OPTION_END; options++) {
		if (options->short_name == *p->opt) {
			p->opt = p->opt[1] ? p->opt + 1 : NULL;
			return get_value(p, options, OPT_SHORT);
		}
	}
	return error("unknown switch `%c'", *p->opt);
}

static int parse_long_opt(struct optparse_t *p, const char *arg,
                          const struct option *options)
{
	const char *arg_end = strchr(arg, '=');
	const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
	int abbrev_flags = 0, ambiguous_flags = 0;

	if (!arg_end)
		arg_end = arg + strlen(arg);

	for (; options->type != OPTION_END; options++) {
		const char *rest;
		int flags = 0;

		if (!options->long_name)
			continue;

		rest = skip_prefix(arg, options->long_name);
		if (!rest) {
			/* abbreviated? */
			if (!strncmp(options->long_name, arg, arg_end - arg)) {
is_abbreviated:
				if (abbrev_option) {
					/*
					 * If this is abbreviated, it is
					 * ambiguous. So when there is no
					 * exact match later, we need to
					 * error out.
					 */
					ambiguous_option = abbrev_option;
					ambiguous_flags = abbrev_flags;
				}
				if (!(flags & OPT_UNSET) && *arg_end)
					p->opt = arg_end + 1;
				abbrev_option = options;
				abbrev_flags = flags;
				continue;
			}
			/* negated and abbreviated very much? */
			if (!prefixcmp("no-", arg)) {
				flags |= OPT_UNSET;
				goto is_abbreviated;
			}
			/* negated? */
			if (strncmp(arg, "no-", 3))
				continue;
			flags |= OPT_UNSET;
			rest = skip_prefix(arg + 3, options->long_name);
			/* abbreviated and negated? */
			if (!rest && !prefixcmp(options->long_name, arg + 3))
				goto is_abbreviated;
			if (!rest)
				continue;
		}
		if (*rest) {
			if (*rest != '=')
				continue;
			p->opt = rest + 1;
		}
		return get_value(p, options, flags);
	}

	if (ambiguous_option)
		return error("Ambiguous option: %s "
			"(could be --%s%s or --%s%s)",
			arg,
			(ambiguous_flags & OPT_UNSET) ?  "no-" : "",
			ambiguous_option->long_name,
			(abbrev_flags & OPT_UNSET) ?  "no-" : "",
			abbrev_option->long_name);
	if (abbrev_option)
		return get_value(p, abbrev_option, abbrev_flags);
	return error("unknown option `%s'", arg);
}

static NORETURN void usage_with_options_internal(const char * const *,
                                                 const struct option *, int);

int parse_options(int argc, const char **argv, const struct option *options,
                  const char * const usagestr[], int flags)
{
	struct optparse_t args = { argv + 1, argc - 1, NULL };
	int j = 0;

	for (; args.argc; args.argc--, args.argv++) {
		const char *arg = args.argv[0];

		if (*arg != '-' || !arg[1]) {
			argv[j++] = args.argv[0];
			continue;
		}

		if (arg[1] != '-') {
			args.opt = arg + 1;
			do {
				if (*args.opt == 'h')
					usage_with_options(usagestr, options);
				if (parse_short_opt(&args, options) < 0)
					usage_with_options(usagestr, options);
			} while (args.opt);
			continue;
		}

		if (!arg[2]) { /* "--" */
			if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
				args.argc--;
				args.argv++;
			}
			break;
		}

		if (!strcmp(arg + 2, "help-all"))
			usage_with_options_internal(usagestr, options, 1);
		if (!strcmp(arg + 2, "help"))
			usage_with_options(usagestr, options);
		if (parse_long_opt(&args, arg + 2, options))
			usage_with_options(usagestr, options);
	}

	memmove(argv + j, args.argv, args.argc * sizeof(*argv));
	argv[j + args.argc] = NULL;
	return j + args.argc;
}

#define USAGE_OPTS_WIDTH 24
#define USAGE_GAP         2

void usage_with_options_internal(const char * const *usagestr,
                                 const struct option *opts, int full)
{
	fprintf(stderr, "usage: %s\n", *usagestr++);
	while (*usagestr && **usagestr)
		fprintf(stderr, "   or: %s\n", *usagestr++);
	while (*usagestr)
		fprintf(stderr, "    %s\n", *usagestr++);

	if (opts->type != OPTION_GROUP)
		fputc('\n', stderr);

	for (; opts->type != OPTION_END; opts++) {
		size_t pos;
		int pad;

		if (opts->type == OPTION_GROUP) {
			fputc('\n', stderr);
			if (*opts->help)
				fprintf(stderr, "%s\n", opts->help);
			continue;
		}
		if (!full && (opts->flags & PARSE_OPT_HIDDEN))
			continue;

		pos = fprintf(stderr, "    ");
		if (opts->short_name)
			pos += fprintf(stderr, "-%c", opts->short_name);
		if (opts->long_name && opts->short_name)
			pos += fprintf(stderr, ", ");
		if (opts->long_name)
			pos += fprintf(stderr, "--%s", opts->long_name);

		switch (opts->type) {
		case OPTION_INTEGER:
			if (opts->flags & PARSE_OPT_OPTARG)
				pos += fprintf(stderr, " [<n>]");
			else
				pos += fprintf(stderr, " <n>");
			break;
		case OPTION_CALLBACK:
			if (opts->flags & PARSE_OPT_NOARG)
				break;
			/* FALLTHROUGH */
		case OPTION_STRING:
			if (opts->argh) {
				if (opts->flags & PARSE_OPT_OPTARG)
					pos += fprintf(stderr, " [<%s>]", opts->argh);
				else
					pos += fprintf(stderr, " <%s>", opts->argh);
			} else {
				if (opts->flags & PARSE_OPT_OPTARG)
					pos += fprintf(stderr, " [...]");
				else
					pos += fprintf(stderr, " ...");
			}
			break;
		default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
			break;
		}

		if (pos <= USAGE_OPTS_WIDTH)
			pad = USAGE_OPTS_WIDTH - pos;
		else {
			fputc('\n', stderr);
			pad = USAGE_OPTS_WIDTH;
		}
		fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
	}
	fputc('\n', stderr);

	exit(129);
}

void usage_with_options(const char * const *usagestr,
                        const struct option *opts)
{
	usage_with_options_internal(usagestr, opts, 0);
}

/*----- some often used options -----*/
#include "cache.h"

int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
{
	int v;

	if (!arg) {
		v = unset ? 0 : DEFAULT_ABBREV;
	} else {
		v = strtol(arg, (char **)&arg, 10);
		if (*arg)
			return opterror(opt, "expects a numerical value", 0);
		if (v && v < MINIMUM_ABBREV)
			v = MINIMUM_ABBREV;
		else if (v > 40)
			v = 40;
	}
	*(int *)(opt->value) = v;
	return 0;
}
Commit	Line	Data
4a59fd13 PH	1	#include "git-compat-util.h"
4a59fd13 PH	2	#include "parse-options.h"
4a59fd13 PH	3
	4	#define OPT_SHORT 1
	5	#define OPT_UNSET 2
	6
	7	struct optparse_t {
	8	const char **argv;
	9	int argc;
	10	const char *opt;
	11	};
	12
	13	static inline const char get_arg(struct optparse_t p)
	14	{
	15	if (p->opt) {
	16	const char *res = p->opt;
	17	p->opt = NULL;
	18	return res;
	19	}
	20	p->argc--;
	21	return *++p->argv;
	22	}
	23
	24	static inline const char skip_prefix(const char str, const char *prefix)
	25	{
	26	size_t len = strlen(prefix);
	27	return strncmp(str, prefix, len) ? NULL : str + len;
	28	}
	29
	30	static int opterror(const struct option opt, const char reason, int flags)
	31	{
	32	if (flags & OPT_SHORT)
	33	return error("switch `%c' %s", opt->short_name, reason);
	34	if (flags & OPT_UNSET)
	35	return error("option `no-%s' %s", opt->long_name, reason);
	36	return error("option `%s' %s", opt->long_name, reason);
	37	}
	38
	39	static int get_value(struct optparse_t *p,
	40	const struct option *opt, int flags)
	41	{
ffe659f9	42	const char s, arg;
db7244bd	43	const int unset = flags & OPT_UNSET;
4a59fd13	44
db7244bd	45	if (unset && p->opt)
4a59fd13	46	return opterror(opt, "takes no value", flags);
db7244bd PH	47	if (unset && (opt->flags & PARSE_OPT_NONEG))
db7244bd PH	48	return opterror(opt, "isn't available", flags);
4a59fd13	49
db7244bd PH	50	if (!(flags & OPT_SHORT) && p->opt) {
	51	switch (opt->type) {
	52	case OPTION_CALLBACK:
	53	if (!(opt->flags & PARSE_OPT_NOARG))
	54	break;
	55	/* FALLTHROUGH */
	56	case OPTION_BOOLEAN:
	57	case OPTION_BIT:
	58	case OPTION_SET_INT:
	59	case OPTION_SET_PTR:
4a59fd13	60	return opterror(opt, "takes no value", flags);
db7244bd PH	61	default:
	62	break;
	63	}
	64	}
	65
	66	arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL);
	67	switch (opt->type) {
	68	case OPTION_BIT:
	69	if (unset)
	70	(int )opt->value &= ~opt->defval;
4a59fd13	71	else
db7244bd PH	72	(int )opt->value \|= opt->defval;
	73	return 0;
	74
	75	case OPTION_BOOLEAN:
	76	(int )opt->value = unset ? 0 : (int )opt->value + 1;
	77	return 0;
	78
	79	case OPTION_SET_INT:
	80	(int )opt->value = unset ? 0 : opt->defval;
	81	return 0;
	82
	83	case OPTION_SET_PTR:
	84	(void )opt->value = unset ? NULL : (void )opt->defval;
4a59fd13 PH	85	return 0;
	86
	87	case OPTION_STRING:
db7244bd PH	88	if (unset) {
db7244bd PH	89	(const char *)opt->value = NULL;
4a59fd13 PH	90	return 0;
4a59fd13 PH	91	}
ffe659f9 PH	92	if (opt->flags & PARSE_OPT_OPTARG && (!arg \|\| *arg == '-')) {
	93	(const char )opt->value = (const char )opt->defval;
	94	return 0;
	95	}
	96	if (!arg)
4a59fd13 PH	97	return opterror(opt, "requires a value", flags);
	98	(const char *)opt->value = get_arg(p);
	99	return 0;
	100
ffe659f9	101	case OPTION_CALLBACK:
db7244bd	102	if (unset)
ffe659f9	103	return (*opt->callback)(opt, NULL, 1);
db7244bd	104	if (opt->flags & PARSE_OPT_NOARG)
f481e22a	105	return (*opt->callback)(opt, NULL, 0);
ffe659f9 PH	106	if (opt->flags & PARSE_OPT_OPTARG && (!arg \|\| *arg == '-'))
	107	return (*opt->callback)(opt, NULL, 0);
	108	if (!arg)
	109	return opterror(opt, "requires a value", flags);
	110	return (*opt->callback)(opt, get_arg(p), 0);
	111
4a59fd13	112	case OPTION_INTEGER:
db7244bd	113	if (unset) {
4a59fd13 PH	114	(int )opt->value = 0;
	115	return 0;
	116	}
ffe659f9 PH	117	if (opt->flags & PARSE_OPT_OPTARG && (!arg \|\| !isdigit(*arg))) {
	118	(int )opt->value = opt->defval;
	119	return 0;
	120	}
	121	if (!arg)
4a59fd13 PH	122	return opterror(opt, "requires a value", flags);
	123	(int )opt->value = strtol(get_arg(p), (char **)&s, 10);
	124	if (*s)
	125	return opterror(opt, "expects a numerical value", flags);
	126	return 0;
	127
	128	default:
	129	die("should not happen, someone must be hit on the forehead");
	130	}
	131	}
	132
	133	static int parse_short_opt(struct optparse_t p, const struct option options)
	134	{
	135	for (; options->type != OPTION_END; options++) {
	136	if (options->short_name == *p->opt) {
	137	p->opt = p->opt[1] ? p->opt + 1 : NULL;
	138	return get_value(p, options, OPT_SHORT);
	139	}
	140	}
	141	return error("unknown switch `%c'", *p->opt);
	142	}
	143
	144	static int parse_long_opt(struct optparse_t p, const char arg,
	145	const struct option *options)
	146	{
7f275b91	147	const char *arg_end = strchr(arg, '=');
243e0614 JS	148	const struct option abbrev_option = NULL, ambiguous_option = NULL;
243e0614 JS	149	int abbrev_flags = 0, ambiguous_flags = 0;
7f275b91 JS	150
	151	if (!arg_end)
	152	arg_end = arg + strlen(arg);
	153
4a59fd13 PH	154	for (; options->type != OPTION_END; options++) {
	155	const char *rest;
	156	int flags = 0;
	157
	158	if (!options->long_name)
	159	continue;
	160
	161	rest = skip_prefix(arg, options->long_name);
	162	if (!rest) {
7f275b91 JS	163	/* abbreviated? */
	164	if (!strncmp(options->long_name, arg, arg_end - arg)) {
	165	is_abbreviated:
243e0614 JS	166	if (abbrev_option) {
	167	/*
	168	* If this is abbreviated, it is
	169	* ambiguous. So when there is no
	170	* exact match later, we need to
	171	* error out.
	172	*/
	173	ambiguous_option = abbrev_option;
	174	ambiguous_flags = abbrev_flags;
	175	}
7f275b91 JS	176	if (!(flags & OPT_UNSET) && *arg_end)
	177	p->opt = arg_end + 1;
	178	abbrev_option = options;
	179	abbrev_flags = flags;
	180	continue;
	181	}
	182	/* negated and abbreviated very much? */
	183	if (!prefixcmp("no-", arg)) {
	184	flags \|= OPT_UNSET;
	185	goto is_abbreviated;
	186	}
	187	/* negated? */
4a59fd13 PH	188	if (strncmp(arg, "no-", 3))
	189	continue;
	190	flags \|= OPT_UNSET;
	191	rest = skip_prefix(arg + 3, options->long_name);
7f275b91 JS	192	/* abbreviated and negated? */
	193	if (!rest && !prefixcmp(options->long_name, arg + 3))
	194	goto is_abbreviated;
4a59fd13 PH	195	if (!rest)
	196	continue;
	197	}
	198	if (*rest) {
	199	if (*rest != '=')
	200	continue;
	201	p->opt = rest + 1;
	202	}
	203	return get_value(p, options, flags);
	204	}
243e0614 JS	205
	206	if (ambiguous_option)
	207	return error("Ambiguous option: %s "
	208	"(could be --%s%s or --%s%s)",
	209	arg,
	210	(ambiguous_flags & OPT_UNSET) ? "no-" : "",
	211	ambiguous_option->long_name,
	212	(abbrev_flags & OPT_UNSET) ? "no-" : "",
	213	abbrev_option->long_name);
7f275b91 JS	214	if (abbrev_option)
7f275b91 JS	215	return get_value(p, abbrev_option, abbrev_flags);
4a59fd13 PH	216	return error("unknown option `%s'", arg);
	217	}
	218
dd3bf0f4 PH	219	static NORETURN void usage_with_options_internal(const char * const *,
	220	const struct option *, int);
	221
4a59fd13	222	int parse_options(int argc, const char *argv, const struct option options,
d7a38c54	223	const char * const usagestr[], int flags)
4a59fd13 PH	224	{
	225	struct optparse_t args = { argv + 1, argc - 1, NULL };
	226	int j = 0;
	227
	228	for (; args.argc; args.argc--, args.argv++) {
	229	const char *arg = args.argv[0];
	230
	231	if (*arg != '-' \|\| !arg[1]) {
	232	argv[j++] = args.argv[0];
	233	continue;
	234	}
	235
	236	if (arg[1] != '-') {
	237	args.opt = arg + 1;
	238	do {
	239	if (*args.opt == 'h')
d7a38c54	240	usage_with_options(usagestr, options);
4a59fd13	241	if (parse_short_opt(&args, options) < 0)
d7a38c54	242	usage_with_options(usagestr, options);
4a59fd13 PH	243	} while (args.opt);
	244	continue;
	245	}
	246
	247	if (!arg[2]) { /* "--" */
	248	if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
	249	args.argc--;
	250	args.argv++;
	251	}
	252	break;
	253	}
	254
dd3bf0f4 PH	255	if (!strcmp(arg + 2, "help-all"))
dd3bf0f4 PH	256	usage_with_options_internal(usagestr, options, 1);
4a59fd13	257	if (!strcmp(arg + 2, "help"))
d7a38c54	258	usage_with_options(usagestr, options);
4a59fd13	259	if (parse_long_opt(&args, arg + 2, options))
d7a38c54	260	usage_with_options(usagestr, options);
4a59fd13 PH	261	}
	262
	263	memmove(argv + j, args.argv, args.argc * sizeof(*argv));
	264	argv[j + args.argc] = NULL;
	265	return j + args.argc;
	266	}
d7a38c54 PH	267
	268	#define USAGE_OPTS_WIDTH 24
	269	#define USAGE_GAP 2
	270
dd3bf0f4 PH	271	void usage_with_options_internal(const char * const *usagestr,
dd3bf0f4 PH	272	const struct option *opts, int full)
d7a38c54	273	{
f389c808 AR	274	fprintf(stderr, "usage: %s\n", *usagestr++);
	275	while (usagestr && *usagestr)
	276	fprintf(stderr, " or: %s\n", *usagestr++);
	277	while (*usagestr)
	278	fprintf(stderr, " %s\n", *usagestr++);
d7a38c54 PH	279
d7a38c54 PH	280	if (opts->type != OPTION_GROUP)
f389c808	281	fputc('\n', stderr);
d7a38c54 PH	282
	283	for (; opts->type != OPTION_END; opts++) {
	284	size_t pos;
	285	int pad;
	286
	287	if (opts->type == OPTION_GROUP) {
f389c808	288	fputc('\n', stderr);
d7a38c54	289	if (*opts->help)
f389c808	290	fprintf(stderr, "%s\n", opts->help);
d7a38c54 PH	291	continue;
d7a38c54 PH	292	}
dd3bf0f4 PH	293	if (!full && (opts->flags & PARSE_OPT_HIDDEN))
dd3bf0f4 PH	294	continue;
d7a38c54	295
f389c808	296	pos = fprintf(stderr, " ");
d7a38c54	297	if (opts->short_name)
f389c808	298	pos += fprintf(stderr, "-%c", opts->short_name);
d7a38c54	299	if (opts->long_name && opts->short_name)
f389c808	300	pos += fprintf(stderr, ", ");
d7a38c54	301	if (opts->long_name)
f389c808	302	pos += fprintf(stderr, "--%s", opts->long_name);
d7a38c54 PH	303
	304	switch (opts->type) {
	305	case OPTION_INTEGER:
ffe659f9 PH	306	if (opts->flags & PARSE_OPT_OPTARG)
	307	pos += fprintf(stderr, " [<n>]");
	308	else
	309	pos += fprintf(stderr, " <n>");
d7a38c54	310	break;
ffe659f9	311	case OPTION_CALLBACK:
f481e22a PH	312	if (opts->flags & PARSE_OPT_NOARG)
	313	break;
	314	/* FALLTHROUGH */
	315	case OPTION_STRING:
ffe659f9 PH	316	if (opts->argh) {
	317	if (opts->flags & PARSE_OPT_OPTARG)
	318	pos += fprintf(stderr, " [<%s>]", opts->argh);
	319	else
	320	pos += fprintf(stderr, " <%s>", opts->argh);
	321	} else {
	322	if (opts->flags & PARSE_OPT_OPTARG)
	323	pos += fprintf(stderr, " [...]");
	324	else
	325	pos += fprintf(stderr, " ...");
	326	}
d7a38c54	327	break;
db7244bd	328	default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
d7a38c54 PH	329	break;
	330	}
	331
f389c808 AR	332	if (pos <= USAGE_OPTS_WIDTH)
f389c808 AR	333	pad = USAGE_OPTS_WIDTH - pos;
d7a38c54	334	else {
f389c808	335	fputc('\n', stderr);
d7a38c54 PH	336	pad = USAGE_OPTS_WIDTH;
d7a38c54 PH	337	}
f389c808	338	fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
d7a38c54	339	}
f389c808 AR	340	fputc('\n', stderr);
	341
	342	exit(129);
d7a38c54	343	}
0ce865b1	344
dd3bf0f4 PH	345	void usage_with_options(const char * const *usagestr,
	346	const struct option *opts)
	347	{
	348	usage_with_options_internal(usagestr, opts, 0);
	349	}
	350
0ce865b1 PH	351	/----- some often used options -----/
0ce865b1 PH	352	#include "cache.h"
db7244bd	353
0ce865b1 PH	354	int parse_opt_abbrev_cb(const struct option opt, const char arg, int unset)
	355	{
	356	int v;
	357
	358	if (!arg) {
	359	v = unset ? 0 : DEFAULT_ABBREV;
	360	} else {
	361	v = strtol(arg, (char **)&arg, 10);
	362	if (*arg)
	363	return opterror(opt, "expects a numerical value", 0);
	364	if (v && v < MINIMUM_ABBREV)
	365	v = MINIMUM_ABBREV;
	366	else if (v > 40)
	367	v = 40;
	368	}
	369	(int )(opt->value) = v;
	370	return 0;
	371	}