1 #include "git-compat-util.h"
2 #include "parse-options.h"
12 int optbug(const struct option *opt, const char *reason)
16 return error("BUG: switch '%c' (--%s) %s",
17 opt->short_name, opt->long_name, reason);
18 return error("BUG: option '%s' %s", opt->long_name, reason);
20 return error("BUG: switch '%c' %s", opt->short_name, reason);
23 static enum parse_opt_result get_arg(struct parse_opt_ctx_t *p,
24 const struct option *opt,
25 int flags, const char **arg)
30 } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
31 *arg = (const char *)opt->defval;
32 } else if (p->argc > 1) {
36 return error(_("%s requires a value"), optname(opt, flags));
40 static void fix_filename(const char *prefix, const char **file)
42 if (!file || !*file || !prefix || is_absolute_path(*file)
43 || !strcmp("-", *file))
45 *file = prefix_filename(prefix, *file);
48 static enum parse_opt_result opt_command_mode_error(
49 const struct option *opt,
50 const struct option *all_opts,
53 const struct option *that;
54 struct strbuf that_name = STRBUF_INIT;
57 * Find the other option that was used to set the variable
58 * already, and report that this is not compatible with it.
60 for (that = all_opts; that->type != OPTION_END; that++) {
62 that->type != OPTION_CMDMODE ||
63 that->value != opt->value ||
64 that->defval != *(int *)opt->value)
68 strbuf_addf(&that_name, "--%s", that->long_name);
70 strbuf_addf(&that_name, "-%c", that->short_name);
71 error(_("%s is incompatible with %s"),
72 optname(opt, flags), that_name.buf);
73 strbuf_release(&that_name);
74 return PARSE_OPT_ERROR;
76 return error(_("%s : incompatible with something else"),
80 static enum parse_opt_result get_value(struct parse_opt_ctx_t *p,
81 const struct option *opt,
82 const struct option *all_opts,
86 const int unset = flags & OPT_UNSET;
90 return error(_("%s takes no value"), optname(opt, flags));
91 if (unset && (opt->flags & PARSE_OPT_NONEG))
92 return error(_("%s isn't available"), optname(opt, flags));
93 if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
94 return error(_("%s takes no value"), optname(opt, flags));
97 case OPTION_LOWLEVEL_CALLBACK:
98 return opt->ll_callback(p, opt, NULL, unset);
102 *(int *)opt->value &= ~opt->defval;
104 *(int *)opt->value |= opt->defval;
109 *(int *)opt->value |= opt->defval;
111 *(int *)opt->value &= ~opt->defval;
116 BUG("BITOP can't have unset form");
117 *(int *)opt->value &= ~opt->extra;
118 *(int *)opt->value |= opt->defval;
122 if (*(int *)opt->value < 0)
123 *(int *)opt->value = 0;
124 *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
128 *(int *)opt->value = unset ? 0 : opt->defval;
133 * Giving the same mode option twice, although is unnecessary,
134 * is not a grave error, so let it pass.
136 if (*(int *)opt->value && *(int *)opt->value != opt->defval)
137 return opt_command_mode_error(opt, all_opts, flags);
138 *(int *)opt->value = opt->defval;
143 *(const char **)opt->value = NULL;
144 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
145 *(const char **)opt->value = (const char *)opt->defval;
147 return get_arg(p, opt, flags, (const char **)opt->value);
150 case OPTION_FILENAME:
153 *(const char **)opt->value = NULL;
154 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
155 *(const char **)opt->value = (const char *)opt->defval;
157 err = get_arg(p, opt, flags, (const char **)opt->value);
160 fix_filename(p->prefix, (const char **)opt->value);
163 case OPTION_CALLBACK:
165 const char *p_arg = NULL;
170 else if (opt->flags & PARSE_OPT_NOARG)
172 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
174 else if (get_arg(p, opt, flags, &arg))
181 return (*opt->callback)(opt, p_arg, p_unset) ? (-1) : 0;
183 return (*opt->ll_callback)(p, opt, p_arg, p_unset);
187 *(int *)opt->value = 0;
190 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
191 *(int *)opt->value = opt->defval;
194 if (get_arg(p, opt, flags, &arg))
196 *(int *)opt->value = strtol(arg, (char **)&s, 10);
198 return error(_("%s expects a numerical value"),
199 optname(opt, flags));
202 case OPTION_MAGNITUDE:
204 *(unsigned long *)opt->value = 0;
207 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
208 *(unsigned long *)opt->value = opt->defval;
211 if (get_arg(p, opt, flags, &arg))
213 if (!git_parse_ulong(arg, opt->value))
214 return error(_("%s expects a non-negative integer value"
215 " with an optional k/m/g suffix"),
216 optname(opt, flags));
220 BUG("opt->type %d should not happen", opt->type);
224 static enum parse_opt_result parse_short_opt(struct parse_opt_ctx_t *p,
225 const struct option *options)
227 const struct option *all_opts = options;
228 const struct option *numopt = NULL;
230 for (; options->type != OPTION_END; options++) {
231 if (options->short_name == *p->opt) {
232 p->opt = p->opt[1] ? p->opt + 1 : NULL;
233 return get_value(p, options, all_opts, OPT_SHORT);
237 * Handle the numerical option later, explicit one-digit
238 * options take precedence over it.
240 if (options->type == OPTION_NUMBER)
243 if (numopt && isdigit(*p->opt)) {
248 while (isdigit(p->opt[len]))
250 arg = xmemdupz(p->opt, len);
251 p->opt = p->opt[len] ? p->opt + len : NULL;
252 if (numopt->callback)
253 rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
255 rc = (*numopt->ll_callback)(p, numopt, arg, 0);
259 return PARSE_OPT_UNKNOWN;
262 static enum parse_opt_result parse_long_opt(
263 struct parse_opt_ctx_t *p, const char *arg,
264 const struct option *options)
266 const struct option *all_opts = options;
267 const char *arg_end = strchrnul(arg, '=');
268 const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
269 int abbrev_flags = 0, ambiguous_flags = 0;
271 for (; options->type != OPTION_END; options++) {
272 const char *rest, *long_name = options->long_name;
273 int flags = 0, opt_flags = 0;
279 if (!skip_prefix(arg, long_name, &rest))
281 if (options->type == OPTION_ARGUMENT) {
285 return error(_("%s takes no value"),
286 optname(options, flags));
290 *(int *)options->value = options->defval;
291 p->out[p->cpidx++] = arg - 2;
292 return PARSE_OPT_DONE;
296 if (!(p->flags & PARSE_OPT_KEEP_UNKNOWN) &&
297 !strncmp(long_name, arg, arg_end - arg)) {
301 * If this is abbreviated, it is
302 * ambiguous. So when there is no
303 * exact match later, we need to
306 ambiguous_option = abbrev_option;
307 ambiguous_flags = abbrev_flags;
309 if (!(flags & OPT_UNSET) && *arg_end)
310 p->opt = arg_end + 1;
311 abbrev_option = options;
312 abbrev_flags = flags ^ opt_flags;
315 /* negation allowed? */
316 if (options->flags & PARSE_OPT_NONEG)
318 /* negated and abbreviated very much? */
319 if (starts_with("no-", arg)) {
324 if (!starts_with(arg, "no-")) {
325 if (starts_with(long_name, "no-")) {
327 opt_flags |= OPT_UNSET;
333 if (!skip_prefix(arg + 3, long_name, &rest)) {
334 /* abbreviated and negated? */
335 if (starts_with(long_name, arg + 3))
346 return get_value(p, options, all_opts, flags ^ opt_flags);
349 if (ambiguous_option) {
350 error(_("ambiguous option: %s "
351 "(could be --%s%s or --%s%s)"),
353 (ambiguous_flags & OPT_UNSET) ? "no-" : "",
354 ambiguous_option->long_name,
355 (abbrev_flags & OPT_UNSET) ? "no-" : "",
356 abbrev_option->long_name);
357 return PARSE_OPT_HELP;
360 return get_value(p, abbrev_option, all_opts, abbrev_flags);
361 return PARSE_OPT_UNKNOWN;
364 static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
365 const struct option *options)
367 const struct option *all_opts = options;
369 for (; options->type != OPTION_END; options++) {
370 if (!(options->flags & PARSE_OPT_NODASH))
372 if (options->short_name == arg[0] && arg[1] == '\0')
373 return get_value(p, options, all_opts, OPT_SHORT);
378 static void check_typos(const char *arg, const struct option *options)
383 if (starts_with(arg, "no-")) {
384 error(_("did you mean `--%s` (with two dashes ?)"), arg);
388 for (; options->type != OPTION_END; options++) {
389 if (!options->long_name)
391 if (starts_with(options->long_name, arg)) {
392 error(_("did you mean `--%s` (with two dashes ?)"), arg);
398 static void parse_options_check(const struct option *opts)
401 char short_opts[128];
403 memset(short_opts, '\0', sizeof(short_opts));
404 for (; opts->type != OPTION_END; opts++) {
405 if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
406 (opts->flags & PARSE_OPT_OPTARG))
407 err |= optbug(opts, "uses incompatible flags "
408 "LASTARG_DEFAULT and OPTARG");
409 if (opts->short_name) {
410 if (0x7F <= opts->short_name)
411 err |= optbug(opts, "invalid short name");
412 else if (short_opts[opts->short_name]++)
413 err |= optbug(opts, "short name already used");
415 if (opts->flags & PARSE_OPT_NODASH &&
416 ((opts->flags & PARSE_OPT_OPTARG) ||
417 !(opts->flags & PARSE_OPT_NOARG) ||
418 !(opts->flags & PARSE_OPT_NONEG) ||
420 err |= optbug(opts, "uses feature "
421 "not supported for dashless options");
422 switch (opts->type) {
428 if ((opts->flags & PARSE_OPT_OPTARG) ||
429 !(opts->flags & PARSE_OPT_NOARG))
430 err |= optbug(opts, "should not accept an argument");
432 case OPTION_CALLBACK:
433 if (!opts->callback && !opts->ll_callback)
434 BUG("OPTION_CALLBACK needs one callback");
435 if (opts->callback && opts->ll_callback)
436 BUG("OPTION_CALLBACK can't have two callbacks");
438 case OPTION_LOWLEVEL_CALLBACK:
439 if (!opts->ll_callback)
440 BUG("OPTION_LOWLEVEL_CALLBACK needs a callback");
442 BUG("OPTION_LOWLEVEL_CALLBACK needs no high level callback");
445 ; /* ok. (usually accepts an argument) */
448 strcspn(opts->argh, " _") != strlen(opts->argh))
449 err |= optbug(opts, "multi-word argh should use dash to separate words");
455 void parse_options_start(struct parse_opt_ctx_t *ctx,
456 int argc, const char **argv, const char *prefix,
457 const struct option *options, int flags)
459 memset(ctx, 0, sizeof(*ctx));
462 if (!(flags & PARSE_OPT_ONE_SHOT)) {
466 ctx->total = ctx->argc;
468 ctx->prefix = prefix;
469 ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
471 if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
472 (flags & PARSE_OPT_STOP_AT_NON_OPTION) &&
473 !(flags & PARSE_OPT_ONE_SHOT))
474 BUG("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
475 if ((flags & PARSE_OPT_ONE_SHOT) &&
476 (flags & PARSE_OPT_KEEP_ARGV0))
477 BUG("Can't keep argv0 if you don't have it");
478 parse_options_check(options);
481 static void show_negated_gitcomp(const struct option *opts, int nr_noopts)
483 int printed_dashdash = 0;
485 for (; opts->type != OPTION_END; opts++) {
486 int has_unset_form = 0;
489 if (!opts->long_name)
491 if (opts->flags & (PARSE_OPT_HIDDEN | PARSE_OPT_NOCOMPLETE))
493 if (opts->flags & PARSE_OPT_NONEG)
496 switch (opts->type) {
498 case OPTION_FILENAME:
500 case OPTION_MAGNITUDE:
501 case OPTION_CALLBACK:
514 if (skip_prefix(opts->long_name, "no-", &name)) {
516 printf(" --%s", name);
517 } else if (nr_noopts >= 0) {
518 if (nr_noopts && !printed_dashdash) {
520 printed_dashdash = 1;
522 printf(" --no-%s", opts->long_name);
528 static int show_gitcomp(struct parse_opt_ctx_t *ctx,
529 const struct option *opts)
531 const struct option *original_opts = opts;
534 for (; opts->type != OPTION_END; opts++) {
535 const char *suffix = "";
537 if (!opts->long_name)
539 if (opts->flags & (PARSE_OPT_HIDDEN | PARSE_OPT_NOCOMPLETE))
542 switch (opts->type) {
546 case OPTION_FILENAME:
548 case OPTION_MAGNITUDE:
549 case OPTION_CALLBACK:
550 if (opts->flags & PARSE_OPT_NOARG)
552 if (opts->flags & PARSE_OPT_OPTARG)
554 if (opts->flags & PARSE_OPT_LASTARG_DEFAULT)
561 if (opts->flags & PARSE_OPT_COMP_ARG)
563 if (starts_with(opts->long_name, "no-"))
565 printf(" --%s%s", opts->long_name, suffix);
567 show_negated_gitcomp(original_opts, -1);
568 show_negated_gitcomp(original_opts, nr_noopts);
570 return PARSE_OPT_COMPLETE;
573 static int usage_with_options_internal(struct parse_opt_ctx_t *,
574 const char * const *,
575 const struct option *, int, int);
577 int parse_options_step(struct parse_opt_ctx_t *ctx,
578 const struct option *options,
579 const char * const usagestr[])
581 int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
583 /* we must reset ->opt, unknown short option leave it dangling */
586 for (; ctx->argc; ctx->argc--, ctx->argv++) {
587 const char *arg = ctx->argv[0];
589 if (ctx->flags & PARSE_OPT_ONE_SHOT &&
590 ctx->argc != ctx->total)
593 if (*arg != '-' || !arg[1]) {
594 if (parse_nodash_opt(ctx, arg, options) == 0)
596 if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
597 return PARSE_OPT_NON_OPTION;
598 ctx->out[ctx->cpidx++] = ctx->argv[0];
602 /* lone -h asks for help */
603 if (internal_help && ctx->total == 1 && !strcmp(arg + 1, "h"))
606 /* lone --git-completion-helper is asked by git-completion.bash */
607 if (ctx->total == 1 && !strcmp(arg + 1, "-git-completion-helper"))
608 return show_gitcomp(ctx, options);
612 switch (parse_short_opt(ctx, options)) {
613 case PARSE_OPT_ERROR:
614 return PARSE_OPT_ERROR;
615 case PARSE_OPT_UNKNOWN:
617 check_typos(arg + 1, options);
618 if (internal_help && *ctx->opt == 'h')
621 case PARSE_OPT_NON_OPTION:
623 case PARSE_OPT_COMPLETE:
624 BUG("parse_short_opt() cannot return these");
629 check_typos(arg + 1, options);
631 switch (parse_short_opt(ctx, options)) {
632 case PARSE_OPT_ERROR:
633 return PARSE_OPT_ERROR;
634 case PARSE_OPT_UNKNOWN:
635 if (internal_help && *ctx->opt == 'h')
638 /* fake a short option thing to hide the fact that we may have
639 * started to parse aggregated stuff
641 * This is leaky, too bad.
643 ctx->argv[0] = xstrdup(ctx->opt - 1);
644 *(char *)ctx->argv[0] = '-';
646 case PARSE_OPT_NON_OPTION:
647 case PARSE_OPT_COMPLETE:
649 BUG("parse_short_opt() cannot return these");
657 if (!arg[2]) { /* "--" */
658 if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
665 if (internal_help && !strcmp(arg + 2, "help-all"))
666 return usage_with_options_internal(ctx, usagestr, options, 1, 0);
667 if (internal_help && !strcmp(arg + 2, "help"))
669 switch (parse_long_opt(ctx, arg + 2, options)) {
670 case PARSE_OPT_ERROR:
671 return PARSE_OPT_ERROR;
672 case PARSE_OPT_UNKNOWN:
676 case PARSE_OPT_NON_OPTION:
677 case PARSE_OPT_COMPLETE:
678 BUG("parse_long_opt() cannot return these");
684 if (ctx->flags & PARSE_OPT_ONE_SHOT)
686 if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
687 return PARSE_OPT_UNKNOWN;
688 ctx->out[ctx->cpidx++] = ctx->argv[0];
691 return PARSE_OPT_DONE;
694 return usage_with_options_internal(ctx, usagestr, options, 0, 0);
697 int parse_options_end(struct parse_opt_ctx_t *ctx)
699 if (ctx->flags & PARSE_OPT_ONE_SHOT)
700 return ctx->total - ctx->argc;
702 MOVE_ARRAY(ctx->out + ctx->cpidx, ctx->argv, ctx->argc);
703 ctx->out[ctx->cpidx + ctx->argc] = NULL;
704 return ctx->cpidx + ctx->argc;
707 int parse_options(int argc, const char **argv, const char *prefix,
708 const struct option *options, const char * const usagestr[],
711 struct parse_opt_ctx_t ctx;
713 parse_options_start(&ctx, argc, argv, prefix, options, flags);
714 switch (parse_options_step(&ctx, options, usagestr)) {
716 case PARSE_OPT_ERROR:
718 case PARSE_OPT_COMPLETE:
720 case PARSE_OPT_NON_OPTION:
723 default: /* PARSE_OPT_UNKNOWN */
724 if (ctx.argv[0][1] == '-') {
725 error(_("unknown option `%s'"), ctx.argv[0] + 2);
726 } else if (isascii(*ctx.opt)) {
727 error(_("unknown switch `%c'"), *ctx.opt);
729 error(_("unknown non-ascii option in string: `%s'"),
732 usage_with_options(usagestr, options);
735 precompose_argv(argc, argv);
736 return parse_options_end(&ctx);
739 static int usage_argh(const struct option *opts, FILE *outfile)
742 int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
743 !opts->argh || !!strpbrk(opts->argh, "()<>[]|");
744 if (opts->flags & PARSE_OPT_OPTARG)
746 s = literal ? "[=%s]" : "[=<%s>]";
748 s = literal ? "[%s]" : "[<%s>]";
750 s = literal ? " %s" : " <%s>";
751 return utf8_fprintf(outfile, s, opts->argh ? _(opts->argh) : _("..."));
754 #define USAGE_OPTS_WIDTH 24
757 static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
758 const char * const *usagestr,
759 const struct option *opts, int full, int err)
761 FILE *outfile = err ? stderr : stdout;
765 return PARSE_OPT_HELP;
767 if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
768 fprintf(outfile, "cat <<\\EOF\n");
770 fprintf_ln(outfile, _("usage: %s"), _(*usagestr++));
771 while (*usagestr && **usagestr)
773 * TRANSLATORS: the colon here should align with the
774 * one in "usage: %s" translation.
776 fprintf_ln(outfile, _(" or: %s"), _(*usagestr++));
779 fprintf_ln(outfile, _(" %s"), _(*usagestr));
781 fputc('\n', outfile);
787 for (; opts->type != OPTION_END; opts++) {
791 if (opts->type == OPTION_GROUP) {
792 fputc('\n', outfile);
795 fprintf(outfile, "%s\n", _(opts->help));
798 if (!full && (opts->flags & PARSE_OPT_HIDDEN))
802 fputc('\n', outfile);
806 pos = fprintf(outfile, " ");
807 if (opts->short_name) {
808 if (opts->flags & PARSE_OPT_NODASH)
809 pos += fprintf(outfile, "%c", opts->short_name);
811 pos += fprintf(outfile, "-%c", opts->short_name);
813 if (opts->long_name && opts->short_name)
814 pos += fprintf(outfile, ", ");
816 pos += fprintf(outfile, "--%s", opts->long_name);
817 if (opts->type == OPTION_NUMBER)
818 pos += utf8_fprintf(outfile, _("-NUM"));
820 if ((opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
821 !(opts->flags & PARSE_OPT_NOARG))
822 pos += usage_argh(opts, outfile);
824 if (pos <= USAGE_OPTS_WIDTH)
825 pad = USAGE_OPTS_WIDTH - pos;
827 fputc('\n', outfile);
828 pad = USAGE_OPTS_WIDTH;
830 fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", _(opts->help));
832 fputc('\n', outfile);
834 if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
835 fputs("EOF\n", outfile);
837 return PARSE_OPT_HELP;
840 void NORETURN usage_with_options(const char * const *usagestr,
841 const struct option *opts)
843 usage_with_options_internal(NULL, usagestr, opts, 0, 1);
847 void NORETURN usage_msg_opt(const char *msg,
848 const char * const *usagestr,
849 const struct option *options)
851 fprintf(stderr, "fatal: %s\n\n", msg);
852 usage_with_options(usagestr, options);
855 const char *optname(const struct option *opt, int flags)
857 static struct strbuf sb = STRBUF_INIT;
860 if (flags & OPT_SHORT)
861 strbuf_addf(&sb, "switch `%c'", opt->short_name);
862 else if (flags & OPT_UNSET)
863 strbuf_addf(&sb, "option `no-%s'", opt->long_name);
865 strbuf_addf(&sb, "option `%s'", opt->long_name);