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

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

#define OPT_SHORT 1
#define OPT_UNSET 2

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_arg(struct parse_opt_ctx_t *p, const struct option *opt,
		   int flags, const char **arg)
{
	if (p->opt) {
		*arg = p->opt;
		p->opt = NULL;
	} else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
		*arg = (const char *)opt->defval;
	} else if (p->argc > 1) {
		p->argc--;
		*arg = *++p->argv;
	} else
		return opterror(opt, "requires a value", flags);
	return 0;
}

static int get_value(struct parse_opt_ctx_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;
		}
	}

	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;
		else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
			*(const char **)opt->value = (const char *)opt->defval;
		else
			return get_arg(p, opt, flags, (const char **)opt->value);
		return 0;

	case OPTION_CALLBACK:
		if (unset)
			return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
		if (opt->flags & PARSE_OPT_NOARG)
			return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
		if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
			return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
		if (get_arg(p, opt, flags, &arg))
			return -1;
		return (*opt->callback)(opt, arg, 0) ? (-1) : 0;

	case OPTION_INTEGER:
		if (unset) {
			*(int *)opt->value = 0;
			return 0;
		}
		if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
			*(int *)opt->value = opt->defval;
			return 0;
		}
		if (get_arg(p, opt, flags, &arg))
			return -1;
		*(int *)opt->value = strtol(arg, (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 parse_opt_ctx_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 -2;
}

static int parse_long_opt(struct parse_opt_ctx_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 (options->type == OPTION_ARGUMENT) {
			if (!rest)
				continue;
			if (*rest == '=')
				return opterror(options, "takes no value", flags);
			if (*rest)
				continue;
			p->out[p->cpidx++] = arg - 2;
			return 0;
		}
		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 -2;
}

static void check_typos(const char *arg, const struct option *options)
{
	if (strlen(arg) < 3)
		return;

	if (!prefixcmp(arg, "no-")) {
		error ("did you mean `--%s` (with two dashes ?)", arg);
		exit(129);
	}

	for (; options->type != OPTION_END; options++) {
		if (!options->long_name)
			continue;
		if (!prefixcmp(options->long_name, arg)) {
			error ("did you mean `--%s` (with two dashes ?)", arg);
			exit(129);
		}
	}
}

void parse_options_start(struct parse_opt_ctx_t *ctx,
			 int argc, const char **argv, int flags)
{
	memset(ctx, 0, sizeof(*ctx));
	ctx->argc = argc - 1;
	ctx->argv = argv + 1;
	ctx->out  = argv;
	ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
	ctx->flags = flags;
	if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
	    (flags & PARSE_OPT_STOP_AT_NON_OPTION))
		die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
}

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

int parse_options_step(struct parse_opt_ctx_t *ctx,
		       const struct option *options,
		       const char * const usagestr[])
{
	int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);

	/* we must reset ->opt, unknown short option leave it dangling */
	ctx->opt = NULL;

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

		if (*arg != '-' || !arg[1]) {
			if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
				break;
			ctx->out[ctx->cpidx++] = ctx->argv[0];
			continue;
		}

		if (arg[1] != '-') {
			ctx->opt = arg + 1;
			if (internal_help && *ctx->opt == 'h')
				return parse_options_usage(usagestr, options);
			switch (parse_short_opt(ctx, options)) {
			case -1:
				return parse_options_usage(usagestr, options);
			case -2:
				goto unknown;
			}
			if (ctx->opt)
				check_typos(arg + 1, options);
			while (ctx->opt) {
				if (internal_help && *ctx->opt == 'h')
					return parse_options_usage(usagestr, options);
				switch (parse_short_opt(ctx, options)) {
				case -1:
					return parse_options_usage(usagestr, options);
				case -2:
					/* fake a short option thing to hide the fact that we may have
					 * started to parse aggregated stuff
					 *
					 * This is leaky, too bad.
					 */
					ctx->argv[0] = xstrdup(ctx->opt - 1);
					*(char *)ctx->argv[0] = '-';
					goto unknown;
				}
			}
			continue;
		}

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

		if (internal_help && !strcmp(arg + 2, "help-all"))
			return usage_with_options_internal(usagestr, options, 1);
		if (internal_help && !strcmp(arg + 2, "help"))
			return parse_options_usage(usagestr, options);
		switch (parse_long_opt(ctx, arg + 2, options)) {
		case -1:
			return parse_options_usage(usagestr, options);
		case -2:
			goto unknown;
		}
		continue;
unknown:
		if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
			return PARSE_OPT_UNKNOWN;
		ctx->out[ctx->cpidx++] = ctx->argv[0];
		ctx->opt = NULL;
	}
	return PARSE_OPT_DONE;
}

int parse_options_end(struct parse_opt_ctx_t *ctx)
{
	memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
	ctx->out[ctx->cpidx + ctx->argc] = NULL;
	return ctx->cpidx + ctx->argc;
}

int parse_options(int argc, const char **argv, const struct option *options,
		  const char * const usagestr[], int flags)
{
	struct parse_opt_ctx_t ctx;

	parse_options_start(&ctx, argc, argv, flags);
	switch (parse_options_step(&ctx, options, usagestr)) {
	case PARSE_OPT_HELP:
		exit(129);
	case PARSE_OPT_DONE:
		break;
	default: /* PARSE_OPT_UNKNOWN */
		if (ctx.argv[0][1] == '-') {
			error("unknown option `%s'", ctx.argv[0] + 2);
		} else {
			error("unknown switch `%c'", *ctx.opt);
		}
		usage_with_options(usagestr, options);
	}

	return parse_options_end(&ctx);
}

#define USAGE_OPTS_WIDTH 24
#define USAGE_GAP         2

int usage_with_options_internal(const char * const *usagestr,
				const struct option *opts, int full)
{
	if (!usagestr)
		return PARSE_OPT_HELP;

	fprintf(stderr, "usage: %s\n", *usagestr++);
	while (*usagestr && **usagestr)
		fprintf(stderr, "   or: %s\n", *usagestr++);
	while (*usagestr) {
		fprintf(stderr, "%s%s\n",
				**usagestr ? "    " : "",
				*usagestr);
		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_ARGUMENT:
			break;
		case OPTION_INTEGER:
			if (opts->flags & PARSE_OPT_OPTARG)
				if (opts->long_name)
					pos += fprintf(stderr, "[=<n>]");
				else
					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)
					if (opts->long_name)
						pos += fprintf(stderr, "[=<%s>]", opts->argh);
					else
						pos += fprintf(stderr, "[<%s>]", opts->argh);
				else
					pos += fprintf(stderr, " <%s>", opts->argh);
			} else {
				if (opts->flags & PARSE_OPT_OPTARG)
					if (opts->long_name)
						pos += fprintf(stderr, "[=...]");
					else
						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);

	return PARSE_OPT_HELP;
}

void usage_with_options(const char * const *usagestr,
			const struct option *opts)
{
	usage_with_options_internal(usagestr, opts, 0);
	exit(129);
}

int parse_options_usage(const char * const *usagestr,
			const struct option *opts)
{
	return 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;
}

int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
			     int unset)
{
	*(unsigned long *)(opt->value) = approxidate(arg);
	return 0;
}

int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
			   int unset)
{
	int *target = opt->value;

	if (unset)
		/* --no-quiet, --no-verbose */
		*target = 0;
	else if (opt->short_name == 'v') {
		if (*target >= 0)
			(*target)++;
		else
			*target = 1;
	} else {
		if (*target <= 0)
			(*target)--;
		else
			*target = -1;
	}
	return 0;
}

int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
{
	unsigned char sha1[20];
	struct commit *commit;

	if (!arg)
		return -1;
	if (get_sha1(arg, sha1))
		return error("malformed object name %s", arg);
	commit = lookup_commit_reference(sha1);
	if (!commit)
		return error("no such commit %s", arg);
	commit_list_insert(commit, opt->value);
	return 0;
}

/*
 * This should really be OPTION_FILENAME type as a part of
 * parse_options that take prefix to do this while parsing.
 */
extern const char *parse_options_fix_filename(const char *prefix, const char *file)
{
	if (!file || !prefix || is_absolute_path(file) || !strcmp("-", file))
		return file;
	return prefix_filename(prefix, strlen(prefix), file);
}
Commit	Line	Data
4a59fd13 PH	1	#include "git-compat-util.h"
4a59fd13 PH	2	#include "parse-options.h"
26141b5b	3	#include "cache.h"
269defdf	4	#include "commit.h"
4a59fd13 PH	5
	6	#define OPT_SHORT 1
	7	#define OPT_UNSET 2
	8
4a59fd13 PH	9	static int opterror(const struct option opt, const char reason, int flags)
	10	{
	11	if (flags & OPT_SHORT)
	12	return error("switch `%c' %s", opt->short_name, reason);
	13	if (flags & OPT_UNSET)
	14	return error("option `no-%s' %s", opt->long_name, reason);
	15	return error("option `%s' %s", opt->long_name, reason);
	16	}
	17
1cc6985c PH	18	static int get_arg(struct parse_opt_ctx_t p, const struct option opt,
	19	int flags, const char **arg)
	20	{
	21	if (p->opt) {
	22	*arg = p->opt;
	23	p->opt = NULL;
	24	} else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
	25	arg = (const char )opt->defval;
d5d745f9	26	} else if (p->argc > 1) {
1cc6985c PH	27	p->argc--;
	28	arg = ++p->argv;
	29	} else
	30	return opterror(opt, "requires a value", flags);
	31	return 0;
	32	}
	33
7e7bbcb4	34	static int get_value(struct parse_opt_ctx_t *p,
1cc6985c	35	const struct option *opt, int flags)
4a59fd13	36	{
ffe659f9	37	const char s, arg;
db7244bd	38	const int unset = flags & OPT_UNSET;
4a59fd13	39
db7244bd	40	if (unset && p->opt)
4a59fd13	41	return opterror(opt, "takes no value", flags);
db7244bd PH	42	if (unset && (opt->flags & PARSE_OPT_NONEG))
db7244bd PH	43	return opterror(opt, "isn't available", flags);
4a59fd13	44
db7244bd PH	45	if (!(flags & OPT_SHORT) && p->opt) {
	46	switch (opt->type) {
	47	case OPTION_CALLBACK:
	48	if (!(opt->flags & PARSE_OPT_NOARG))
	49	break;
	50	/* FALLTHROUGH */
	51	case OPTION_BOOLEAN:
	52	case OPTION_BIT:
	53	case OPTION_SET_INT:
	54	case OPTION_SET_PTR:
4a59fd13	55	return opterror(opt, "takes no value", flags);
db7244bd PH	56	default:
	57	break;
	58	}
	59	}
	60
db7244bd PH	61	switch (opt->type) {
	62	case OPTION_BIT:
	63	if (unset)
	64	(int )opt->value &= ~opt->defval;
4a59fd13	65	else
db7244bd PH	66	(int )opt->value \|= opt->defval;
	67	return 0;
	68
	69	case OPTION_BOOLEAN:
	70	(int )opt->value = unset ? 0 : (int )opt->value + 1;
	71	return 0;
	72
	73	case OPTION_SET_INT:
	74	(int )opt->value = unset ? 0 : opt->defval;
	75	return 0;
	76
	77	case OPTION_SET_PTR:
	78	(void )opt->value = unset ? NULL : (void )opt->defval;
4a59fd13 PH	79	return 0;
	80
	81	case OPTION_STRING:
1cc6985c	82	if (unset)
db7244bd	83	(const char *)opt->value = NULL;
1cc6985c	84	else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
ffe659f9	85	(const char )opt->value = (const char )opt->defval;
1cc6985c PH	86	else
1cc6985c PH	87	return get_arg(p, opt, flags, (const char **)opt->value);
4a59fd13 PH	88	return 0;
4a59fd13 PH	89
ffe659f9	90	case OPTION_CALLBACK:
db7244bd	91	if (unset)
07fe54db	92	return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
db7244bd	93	if (opt->flags & PARSE_OPT_NOARG)
07fe54db	94	return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
c43a2483	95	if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
07fe54db	96	return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
1cc6985c PH	97	if (get_arg(p, opt, flags, &arg))
	98	return -1;
	99	return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
ffe659f9	100
4a59fd13	101	case OPTION_INTEGER:
db7244bd	102	if (unset) {
4a59fd13 PH	103	(int )opt->value = 0;
	104	return 0;
	105	}
c43a2483	106	if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
ffe659f9 PH	107	(int )opt->value = opt->defval;
	108	return 0;
	109	}
1cc6985c PH	110	if (get_arg(p, opt, flags, &arg))
	111	return -1;
	112	(int )opt->value = strtol(arg, (char **)&s, 10);
4a59fd13 PH	113	if (*s)
	114	return opterror(opt, "expects a numerical value", flags);
	115	return 0;
	116
	117	default:
	118	die("should not happen, someone must be hit on the forehead");
	119	}
	120	}
	121
7e7bbcb4	122	static int parse_short_opt(struct parse_opt_ctx_t p, const struct option options)
4a59fd13 PH	123	{
	124	for (; options->type != OPTION_END; options++) {
	125	if (options->short_name == *p->opt) {
	126	p->opt = p->opt[1] ? p->opt + 1 : NULL;
	127	return get_value(p, options, OPT_SHORT);
	128	}
	129	}
07fe54db	130	return -2;
4a59fd13 PH	131	}
4a59fd13 PH	132
7e7bbcb4	133	static int parse_long_opt(struct parse_opt_ctx_t p, const char arg,
4a59fd13 PH	134	const struct option *options)
4a59fd13 PH	135	{
7f275b91	136	const char *arg_end = strchr(arg, '=');
243e0614 JS	137	const struct option abbrev_option = NULL, ambiguous_option = NULL;
243e0614 JS	138	int abbrev_flags = 0, ambiguous_flags = 0;
7f275b91 JS	139
	140	if (!arg_end)
	141	arg_end = arg + strlen(arg);
	142
4a59fd13 PH	143	for (; options->type != OPTION_END; options++) {
	144	const char *rest;
	145	int flags = 0;
	146
	147	if (!options->long_name)
	148	continue;
	149
	150	rest = skip_prefix(arg, options->long_name);
580d5bff PH	151	if (options->type == OPTION_ARGUMENT) {
	152	if (!rest)
	153	continue;
	154	if (*rest == '=')
	155	return opterror(options, "takes no value", flags);
	156	if (*rest)
	157	continue;
	158	p->out[p->cpidx++] = arg - 2;
	159	return 0;
	160	}
4a59fd13	161	if (!rest) {
7f275b91 JS	162	/* abbreviated? */
	163	if (!strncmp(options->long_name, arg, arg_end - arg)) {
	164	is_abbreviated:
243e0614 JS	165	if (abbrev_option) {
	166	/*
	167	* If this is abbreviated, it is
	168	* ambiguous. So when there is no
	169	* exact match later, we need to
	170	* error out.
	171	*/
	172	ambiguous_option = abbrev_option;
	173	ambiguous_flags = abbrev_flags;
	174	}
7f275b91 JS	175	if (!(flags & OPT_UNSET) && *arg_end)
	176	p->opt = arg_end + 1;
	177	abbrev_option = options;
	178	abbrev_flags = flags;
	179	continue;
	180	}
	181	/* negated and abbreviated very much? */
	182	if (!prefixcmp("no-", arg)) {
	183	flags \|= OPT_UNSET;
	184	goto is_abbreviated;
	185	}
	186	/* negated? */
4a59fd13 PH	187	if (strncmp(arg, "no-", 3))
	188	continue;
	189	flags \|= OPT_UNSET;
	190	rest = skip_prefix(arg + 3, options->long_name);
7f275b91 JS	191	/* abbreviated and negated? */
	192	if (!rest && !prefixcmp(options->long_name, arg + 3))
	193	goto is_abbreviated;
4a59fd13 PH	194	if (!rest)
	195	continue;
	196	}
	197	if (*rest) {
	198	if (*rest != '=')
	199	continue;
	200	p->opt = rest + 1;
	201	}
	202	return get_value(p, options, flags);
	203	}
243e0614 JS	204
	205	if (ambiguous_option)
	206	return error("Ambiguous option: %s "
	207	"(could be --%s%s or --%s%s)",
	208	arg,
	209	(ambiguous_flags & OPT_UNSET) ? "no-" : "",
	210	ambiguous_option->long_name,
	211	(abbrev_flags & OPT_UNSET) ? "no-" : "",
	212	abbrev_option->long_name);
7f275b91 JS	213	if (abbrev_option)
7f275b91 JS	214	return get_value(p, abbrev_option, abbrev_flags);
07fe54db	215	return -2;
4a59fd13 PH	216	}
4a59fd13 PH	217
1121a878	218	static void check_typos(const char arg, const struct option options)
3a9f0f41 PH	219	{
	220	if (strlen(arg) < 3)
	221	return;
	222
	223	if (!prefixcmp(arg, "no-")) {
	224	error ("did you mean `--%s` (with two dashes ?)", arg);
	225	exit(129);
	226	}
	227
	228	for (; options->type != OPTION_END; options++) {
	229	if (!options->long_name)
	230	continue;
	231	if (!prefixcmp(options->long_name, arg)) {
	232	error ("did you mean `--%s` (with two dashes ?)", arg);
	233	exit(129);
	234	}
	235	}
	236	}
	237
7e7bbcb4 PH	238	void parse_options_start(struct parse_opt_ctx_t *ctx,
	239	int argc, const char **argv, int flags)
	240	{
	241	memset(ctx, 0, sizeof(*ctx));
	242	ctx->argc = argc - 1;
	243	ctx->argv = argv + 1;
	244	ctx->out = argv;
a32a4eaa	245	ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
7e7bbcb4	246	ctx->flags = flags;
0d260f9a RS	247	if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
	248	(flags & PARSE_OPT_STOP_AT_NON_OPTION))
	249	die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
7e7bbcb4 PH	250	}
7e7bbcb4 PH	251
ee68b87a	252	static int usage_with_options_internal(const char * const *,
ff43ec3e	253	const struct option *, int);
dd3bf0f4	254
ff43ec3e PH	255	int parse_options_step(struct parse_opt_ctx_t *ctx,
	256	const struct option *options,
	257	const char * const usagestr[])
4a59fd13	258	{
b92891f9 RS	259	int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
b92891f9 RS	260
26141b5b PH	261	/* we must reset ->opt, unknown short option leave it dangling */
	262	ctx->opt = NULL;
	263
ff43ec3e PH	264	for (; ctx->argc; ctx->argc--, ctx->argv++) {
ff43ec3e PH	265	const char *arg = ctx->argv[0];
4a59fd13 PH	266
4a59fd13 PH	267	if (*arg != '-' \|\| !arg[1]) {
ff43ec3e	268	if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
a0ec9d25	269	break;
ff43ec3e	270	ctx->out[ctx->cpidx++] = ctx->argv[0];
4a59fd13 PH	271	continue;
	272	}
	273
	274	if (arg[1] != '-') {
ff43ec3e	275	ctx->opt = arg + 1;
b92891f9	276	if (internal_help && *ctx->opt == 'h')
ff43ec3e	277	return parse_options_usage(usagestr, options);
07fe54db PH	278	switch (parse_short_opt(ctx, options)) {
	279	case -1:
	280	return parse_options_usage(usagestr, options);
	281	case -2:
b5ce3a54	282	goto unknown;
07fe54db	283	}
ff43ec3e	284	if (ctx->opt)
3a9f0f41	285	check_typos(arg + 1, options);
ff43ec3e	286	while (ctx->opt) {
b92891f9	287	if (internal_help && *ctx->opt == 'h')
ff43ec3e	288	return parse_options_usage(usagestr, options);
07fe54db PH	289	switch (parse_short_opt(ctx, options)) {
	290	case -1:
	291	return parse_options_usage(usagestr, options);
	292	case -2:
26141b5b PH	293	/* fake a short option thing to hide the fact that we may have
	294	* started to parse aggregated stuff
	295	*
	296	* This is leaky, too bad.
	297	*/
	298	ctx->argv[0] = xstrdup(ctx->opt - 1);
	299	(char )ctx->argv[0] = '-';
b5ce3a54	300	goto unknown;
07fe54db	301	}
3a9f0f41	302	}
4a59fd13 PH	303	continue;
	304	}
	305
	306	if (!arg[2]) { /* "--" */
ff43ec3e PH	307	if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
	308	ctx->argc--;
	309	ctx->argv++;
4a59fd13 PH	310	}
	311	break;
	312	}
	313
b92891f9	314	if (internal_help && !strcmp(arg + 2, "help-all"))
ff43ec3e	315	return usage_with_options_internal(usagestr, options, 1);
b92891f9	316	if (internal_help && !strcmp(arg + 2, "help"))
ff43ec3e	317	return parse_options_usage(usagestr, options);
07fe54db PH	318	switch (parse_long_opt(ctx, arg + 2, options)) {
	319	case -1:
	320	return parse_options_usage(usagestr, options);
	321	case -2:
b5ce3a54	322	goto unknown;
07fe54db	323	}
b5ce3a54 RS	324	continue;
	325	unknown:
	326	if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
	327	return PARSE_OPT_UNKNOWN;
	328	ctx->out[ctx->cpidx++] = ctx->argv[0];
	329	ctx->opt = NULL;
ff43ec3e PH	330	}
	331	return PARSE_OPT_DONE;
	332	}
	333
	334	int parse_options_end(struct parse_opt_ctx_t *ctx)
	335	{
	336	memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
	337	ctx->out[ctx->cpidx + ctx->argc] = NULL;
	338	return ctx->cpidx + ctx->argc;
	339	}
	340
	341	int parse_options(int argc, const char *argv, const struct option options,
	342	const char * const usagestr[], int flags)
	343	{
	344	struct parse_opt_ctx_t ctx;
	345
	346	parse_options_start(&ctx, argc, argv, flags);
	347	switch (parse_options_step(&ctx, options, usagestr)) {
	348	case PARSE_OPT_HELP:
	349	exit(129);
	350	case PARSE_OPT_DONE:
	351	break;
	352	default: /* PARSE_OPT_UNKNOWN */
07fe54db PH	353	if (ctx.argv[0][1] == '-') {
	354	error("unknown option `%s'", ctx.argv[0] + 2);
	355	} else {
	356	error("unknown switch `%c'", *ctx.opt);
	357	}
	358	usage_with_options(usagestr, options);
4a59fd13 PH	359	}
4a59fd13 PH	360
7e7bbcb4	361	return parse_options_end(&ctx);
4a59fd13	362	}
d7a38c54 PH	363
	364	#define USAGE_OPTS_WIDTH 24
	365	#define USAGE_GAP 2
	366
ee68b87a	367	int usage_with_options_internal(const char * const *usagestr,
ff43ec3e	368	const struct option *opts, int full)
d7a38c54	369	{
49b61802 RS	370	if (!usagestr)
	371	return PARSE_OPT_HELP;
	372
f389c808 AR	373	fprintf(stderr, "usage: %s\n", *usagestr++);
	374	while (usagestr && *usagestr)
	375	fprintf(stderr, " or: %s\n", *usagestr++);
44d86e91 JK	376	while (*usagestr) {
	377	fprintf(stderr, "%s%s\n",
	378	**usagestr ? " " : "",
	379	*usagestr);
	380	usagestr++;
	381	}
d7a38c54 PH	382
d7a38c54 PH	383	if (opts->type != OPTION_GROUP)
f389c808	384	fputc('\n', stderr);
d7a38c54 PH	385
	386	for (; opts->type != OPTION_END; opts++) {
	387	size_t pos;
	388	int pad;
	389
	390	if (opts->type == OPTION_GROUP) {
f389c808	391	fputc('\n', stderr);
d7a38c54	392	if (*opts->help)
f389c808	393	fprintf(stderr, "%s\n", opts->help);
d7a38c54 PH	394	continue;
d7a38c54 PH	395	}
dd3bf0f4 PH	396	if (!full && (opts->flags & PARSE_OPT_HIDDEN))
dd3bf0f4 PH	397	continue;
d7a38c54	398
f389c808	399	pos = fprintf(stderr, " ");
d7a38c54	400	if (opts->short_name)
f389c808	401	pos += fprintf(stderr, "-%c", opts->short_name);
d7a38c54	402	if (opts->long_name && opts->short_name)
f389c808	403	pos += fprintf(stderr, ", ");
d7a38c54	404	if (opts->long_name)
f389c808	405	pos += fprintf(stderr, "--%s", opts->long_name);
d7a38c54 PH	406
d7a38c54 PH	407	switch (opts->type) {
580d5bff PH	408	case OPTION_ARGUMENT:
580d5bff PH	409	break;
d7a38c54	410	case OPTION_INTEGER:
ffe659f9	411	if (opts->flags & PARSE_OPT_OPTARG)
6422f633 MB	412	if (opts->long_name)
	413	pos += fprintf(stderr, "[=<n>]");
	414	else
	415	pos += fprintf(stderr, "[<n>]");
ffe659f9 PH	416	else
ffe659f9 PH	417	pos += fprintf(stderr, " <n>");
d7a38c54	418	break;
ffe659f9	419	case OPTION_CALLBACK:
f481e22a PH	420	if (opts->flags & PARSE_OPT_NOARG)
	421	break;
	422	/* FALLTHROUGH */
	423	case OPTION_STRING:
ffe659f9 PH	424	if (opts->argh) {
ffe659f9 PH	425	if (opts->flags & PARSE_OPT_OPTARG)
6422f633 MB	426	if (opts->long_name)
	427	pos += fprintf(stderr, "[=<%s>]", opts->argh);
	428	else
	429	pos += fprintf(stderr, "[<%s>]", opts->argh);
ffe659f9 PH	430	else
	431	pos += fprintf(stderr, " <%s>", opts->argh);
	432	} else {
	433	if (opts->flags & PARSE_OPT_OPTARG)
6422f633 MB	434	if (opts->long_name)
	435	pos += fprintf(stderr, "[=...]");
	436	else
	437	pos += fprintf(stderr, "[...]");
ffe659f9 PH	438	else
	439	pos += fprintf(stderr, " ...");
	440	}
d7a38c54	441	break;
db7244bd	442	default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
d7a38c54 PH	443	break;
	444	}
	445
f389c808 AR	446	if (pos <= USAGE_OPTS_WIDTH)
f389c808 AR	447	pad = USAGE_OPTS_WIDTH - pos;
d7a38c54	448	else {
f389c808	449	fputc('\n', stderr);
d7a38c54 PH	450	pad = USAGE_OPTS_WIDTH;
d7a38c54 PH	451	}
f389c808	452	fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
d7a38c54	453	}
f389c808 AR	454	fputc('\n', stderr);
f389c808 AR	455
ee68b87a	456	return PARSE_OPT_HELP;
d7a38c54	457	}
0ce865b1	458
dd3bf0f4	459	void usage_with_options(const char * const *usagestr,
ff43ec3e	460	const struct option *opts)
dd3bf0f4	461	{
ff43ec3e PH	462	usage_with_options_internal(usagestr, opts, 0);
ff43ec3e PH	463	exit(129);
dd3bf0f4 PH	464	}
dd3bf0f4 PH	465
ee68b87a PH	466	int parse_options_usage(const char * const *usagestr,
	467	const struct option *opts)
	468	{
ff43ec3e	469	return usage_with_options_internal(usagestr, opts, 0);
ee68b87a PH	470	}
	471
	472
0ce865b1 PH	473	/----- some often used options -----/
0ce865b1 PH	474	#include "cache.h"
db7244bd	475
0ce865b1 PH	476	int parse_opt_abbrev_cb(const struct option opt, const char arg, int unset)
	477	{
	478	int v;
	479
	480	if (!arg) {
	481	v = unset ? 0 : DEFAULT_ABBREV;
	482	} else {
	483	v = strtol(arg, (char **)&arg, 10);
	484	if (*arg)
	485	return opterror(opt, "expects a numerical value", 0);
	486	if (v && v < MINIMUM_ABBREV)
	487	v = MINIMUM_ABBREV;
	488	else if (v > 40)
	489	v = 40;
	490	}
	491	(int )(opt->value) = v;
	492	return 0;
	493	}
1f4a711a MB	494
	495	int parse_opt_approxidate_cb(const struct option opt, const char arg,
	496	int unset)
	497	{
	498	(unsigned long )(opt->value) = approxidate(arg);
	499	return 0;
	500	}
dbd0f5c7	501
7f87aff2 TA	502	int parse_opt_verbosity_cb(const struct option opt, const char arg,
	503	int unset)
	504	{
	505	int *target = opt->value;
	506
	507	if (unset)
	508	/* --no-quiet, --no-verbose */
	509	*target = 0;
	510	else if (opt->short_name == 'v') {
	511	if (*target >= 0)
	512	(*target)++;
	513	else
	514	*target = 1;
	515	} else {
	516	if (*target <= 0)
	517	(*target)--;
	518	else
	519	*target = -1;
	520	}
	521	return 0;
	522	}
	523
269defdf JG	524	int parse_opt_with_commit(const struct option opt, const char arg, int unset)
	525	{
	526	unsigned char sha1[20];
	527	struct commit *commit;
	528
	529	if (!arg)
	530	return -1;
	531	if (get_sha1(arg, sha1))
	532	return error("malformed object name %s", arg);
	533	commit = lookup_commit_reference(sha1);
	534	if (!commit)
	535	return error("no such commit %s", arg);
	536	commit_list_insert(commit, opt->value);
	537	return 0;
	538	}
	539
dbd0f5c7 JH	540	/*
	541	* This should really be OPTION_FILENAME type as a part of
	542	* parse_options that take prefix to do this while parsing.
	543	*/
	544	extern const char parse_options_fix_filename(const char prefix, const char *file)
	545	{
	546	if (!file \|\| !prefix \|\| is_absolute_path(file) \|\| !strcmp("-", file))
	547	return file;
	548	return prefix_filename(prefix, strlen(prefix), file);
	549	}
	550