1 #include "git-compat-util.h"
2 #include "parse-options.h"
7 static int parse_options_usage(struct parse_opt_ctx_t *ctx,
8 const char * const *usagestr,
9 const struct option *opts, int err);
14 static int optbug(const struct option *opt, const char *reason)
17 return error("BUG: option '%s' %s", opt->long_name, reason);
18 return error("BUG: switch '%c' %s", opt->short_name, reason);
21 static int opterror(const struct option *opt, const char *reason, int flags)
23 if (flags & OPT_SHORT)
24 return error("switch `%c' %s", opt->short_name, reason);
25 if (flags & OPT_UNSET)
26 return error("option `no-%s' %s", opt->long_name, reason);
27 return error("option `%s' %s", opt->long_name, reason);
30 static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
31 int flags, const char **arg)
36 } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
37 *arg = (const char *)opt->defval;
38 } else if (p->argc > 1) {
42 return opterror(opt, "requires a value", flags);
46 static void fix_filename(const char *prefix, const char **file)
48 if (!file || !*file || !prefix || is_absolute_path(*file)
49 || !strcmp("-", *file))
51 *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
54 static int get_value(struct parse_opt_ctx_t *p,
55 const struct option *opt, int flags)
58 const int unset = flags & OPT_UNSET;
62 return opterror(opt, "takes no value", flags);
63 if (unset && (opt->flags & PARSE_OPT_NONEG))
64 return opterror(opt, "isn't available", flags);
65 if (!(flags & OPT_SHORT) && p->opt && (opt->flags & PARSE_OPT_NOARG))
66 return opterror(opt, "takes no value", flags);
69 case OPTION_LOWLEVEL_CALLBACK:
70 return (*(parse_opt_ll_cb *)opt->callback)(p, opt, unset);
74 *(int *)opt->value &= ~opt->defval;
76 *(int *)opt->value |= opt->defval;
81 *(int *)opt->value |= opt->defval;
83 *(int *)opt->value &= ~opt->defval;
87 *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
91 *(int *)opt->value = unset ? 0 : opt->defval;
95 *(void **)opt->value = unset ? NULL : (void *)opt->defval;
100 *(const char **)opt->value = NULL;
101 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
102 *(const char **)opt->value = (const char *)opt->defval;
104 return get_arg(p, opt, flags, (const char **)opt->value);
107 case OPTION_FILENAME:
110 *(const char **)opt->value = NULL;
111 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
112 *(const char **)opt->value = (const char *)opt->defval;
114 err = get_arg(p, opt, flags, (const char **)opt->value);
117 fix_filename(p->prefix, (const char **)opt->value);
120 case OPTION_CALLBACK:
122 return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
123 if (opt->flags & PARSE_OPT_NOARG)
124 return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
125 if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
126 return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
127 if (get_arg(p, opt, flags, &arg))
129 return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
133 *(int *)opt->value = 0;
136 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
137 *(int *)opt->value = opt->defval;
140 if (get_arg(p, opt, flags, &arg))
142 *(int *)opt->value = strtol(arg, (char **)&s, 10);
144 return opterror(opt, "expects a numerical value", flags);
148 die("should not happen, someone must be hit on the forehead");
152 static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
154 const struct option *numopt = NULL;
156 for (; options->type != OPTION_END; options++) {
157 if (options->short_name == *p->opt) {
158 p->opt = p->opt[1] ? p->opt + 1 : NULL;
159 return get_value(p, options, OPT_SHORT);
163 * Handle the numerical option later, explicit one-digit
164 * options take precedence over it.
166 if (options->type == OPTION_NUMBER)
169 if (numopt && isdigit(*p->opt)) {
174 while (isdigit(p->opt[len]))
176 arg = xmemdupz(p->opt, len);
177 p->opt = p->opt[len] ? p->opt + len : NULL;
178 rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
185 static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
186 const struct option *options)
188 const char *arg_end = strchr(arg, '=');
189 const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
190 int abbrev_flags = 0, ambiguous_flags = 0;
193 arg_end = arg + strlen(arg);
195 for (; options->type != OPTION_END; options++) {
199 if (!options->long_name)
202 rest = skip_prefix(arg, options->long_name);
203 if (options->type == OPTION_ARGUMENT) {
207 return opterror(options, "takes no value", flags);
210 p->out[p->cpidx++] = arg - 2;
215 if (!strncmp(options->long_name, arg, arg_end - arg)) {
219 * If this is abbreviated, it is
220 * ambiguous. So when there is no
221 * exact match later, we need to
224 ambiguous_option = abbrev_option;
225 ambiguous_flags = abbrev_flags;
227 if (!(flags & OPT_UNSET) && *arg_end)
228 p->opt = arg_end + 1;
229 abbrev_option = options;
230 abbrev_flags = flags;
233 /* negation allowed? */
234 if (options->flags & PARSE_OPT_NONEG)
236 /* negated and abbreviated very much? */
237 if (!prefixcmp("no-", arg)) {
242 if (strncmp(arg, "no-", 3))
245 rest = skip_prefix(arg + 3, options->long_name);
246 /* abbreviated and negated? */
247 if (!rest && !prefixcmp(options->long_name, arg + 3))
257 return get_value(p, options, flags);
260 if (ambiguous_option)
261 return error("Ambiguous option: %s "
262 "(could be --%s%s or --%s%s)",
264 (ambiguous_flags & OPT_UNSET) ? "no-" : "",
265 ambiguous_option->long_name,
266 (abbrev_flags & OPT_UNSET) ? "no-" : "",
267 abbrev_option->long_name);
269 return get_value(p, abbrev_option, abbrev_flags);
273 static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
274 const struct option *options)
276 for (; options->type != OPTION_END; options++) {
277 if (!(options->flags & PARSE_OPT_NODASH))
279 if (options->short_name == arg[0] && arg[1] == '\0')
280 return get_value(p, options, OPT_SHORT);
285 static void check_typos(const char *arg, const struct option *options)
290 if (!prefixcmp(arg, "no-")) {
291 error ("did you mean `--%s` (with two dashes ?)", arg);
295 for (; options->type != OPTION_END; options++) {
296 if (!options->long_name)
298 if (!prefixcmp(options->long_name, arg)) {
299 error ("did you mean `--%s` (with two dashes ?)", arg);
305 static void parse_options_check(const struct option *opts)
309 for (; opts->type != OPTION_END; opts++) {
310 if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
311 (opts->flags & PARSE_OPT_OPTARG))
312 err |= optbug(opts, "uses incompatible flags "
313 "LASTARG_DEFAULT and OPTARG");
314 if (opts->flags & PARSE_OPT_NODASH &&
315 ((opts->flags & PARSE_OPT_OPTARG) ||
316 !(opts->flags & PARSE_OPT_NOARG) ||
317 !(opts->flags & PARSE_OPT_NONEG) ||
319 err |= optbug(opts, "uses feature "
320 "not supported for dashless options");
321 switch (opts->type) {
328 if ((opts->flags & PARSE_OPT_OPTARG) ||
329 !(opts->flags & PARSE_OPT_NOARG))
330 err |= optbug(opts, "should not accept an argument");
332 ; /* ok. (usually accepts an argument) */
339 void parse_options_start(struct parse_opt_ctx_t *ctx,
340 int argc, const char **argv, const char *prefix,
341 const struct option *options, int flags)
343 memset(ctx, 0, sizeof(*ctx));
344 ctx->argc = argc - 1;
345 ctx->argv = argv + 1;
347 ctx->prefix = prefix;
348 ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
350 if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
351 (flags & PARSE_OPT_STOP_AT_NON_OPTION))
352 die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
353 parse_options_check(options);
356 static int usage_with_options_internal(struct parse_opt_ctx_t *,
357 const char * const *,
358 const struct option *, int, int);
360 int parse_options_step(struct parse_opt_ctx_t *ctx,
361 const struct option *options,
362 const char * const usagestr[])
364 int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
366 /* we must reset ->opt, unknown short option leave it dangling */
369 for (; ctx->argc; ctx->argc--, ctx->argv++) {
370 const char *arg = ctx->argv[0];
372 if (*arg != '-' || !arg[1]) {
373 if (parse_nodash_opt(ctx, arg, options) == 0)
375 if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
376 return PARSE_OPT_NON_OPTION;
377 ctx->out[ctx->cpidx++] = ctx->argv[0];
383 if (internal_help && *ctx->opt == 'h')
384 return parse_options_usage(ctx, usagestr, options, 0);
385 switch (parse_short_opt(ctx, options)) {
387 return parse_options_usage(ctx, usagestr, options, 1);
392 check_typos(arg + 1, options);
394 if (internal_help && *ctx->opt == 'h')
395 return parse_options_usage(ctx, usagestr, options, 0);
396 switch (parse_short_opt(ctx, options)) {
398 return parse_options_usage(ctx, usagestr, options, 1);
400 /* fake a short option thing to hide the fact that we may have
401 * started to parse aggregated stuff
403 * This is leaky, too bad.
405 ctx->argv[0] = xstrdup(ctx->opt - 1);
406 *(char *)ctx->argv[0] = '-';
413 if (!arg[2]) { /* "--" */
414 if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
421 if (internal_help && !strcmp(arg + 2, "help-all"))
422 return usage_with_options_internal(ctx, usagestr, options, 1, 0);
423 if (internal_help && !strcmp(arg + 2, "help"))
424 return parse_options_usage(ctx, usagestr, options, 0);
425 switch (parse_long_opt(ctx, arg + 2, options)) {
427 return parse_options_usage(ctx, usagestr, options, 1);
433 if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
434 return PARSE_OPT_UNKNOWN;
435 ctx->out[ctx->cpidx++] = ctx->argv[0];
438 return PARSE_OPT_DONE;
441 int parse_options_end(struct parse_opt_ctx_t *ctx)
443 memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
444 ctx->out[ctx->cpidx + ctx->argc] = NULL;
445 return ctx->cpidx + ctx->argc;
448 int parse_options(int argc, const char **argv, const char *prefix,
449 const struct option *options, const char * const usagestr[],
452 struct parse_opt_ctx_t ctx;
454 parse_options_start(&ctx, argc, argv, prefix, options, flags);
455 switch (parse_options_step(&ctx, options, usagestr)) {
458 case PARSE_OPT_NON_OPTION:
461 default: /* PARSE_OPT_UNKNOWN */
462 if (ctx.argv[0][1] == '-') {
463 error("unknown option `%s'", ctx.argv[0] + 2);
465 error("unknown switch `%c'", *ctx.opt);
467 usage_with_options(usagestr, options);
470 return parse_options_end(&ctx);
473 static int usage_argh(const struct option *opts, FILE *outfile)
476 int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
477 if (opts->flags & PARSE_OPT_OPTARG)
479 s = literal ? "[=%s]" : "[=<%s>]";
481 s = literal ? "[%s]" : "[<%s>]";
483 s = literal ? " %s" : " <%s>";
484 return fprintf(outfile, s, opts->argh ? opts->argh : "...");
487 #define USAGE_OPTS_WIDTH 24
490 static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
491 const char * const *usagestr,
492 const struct option *opts, int full, int err)
494 FILE *outfile = err ? stderr : stdout;
497 return PARSE_OPT_HELP;
499 if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
500 fprintf(outfile, "cat <<\\EOF\n");
502 fprintf(outfile, "usage: %s\n", *usagestr++);
503 while (*usagestr && **usagestr)
504 fprintf(outfile, " or: %s\n", *usagestr++);
506 fprintf(outfile, "%s%s\n",
507 **usagestr ? " " : "",
512 if (opts->type != OPTION_GROUP)
513 fputc('\n', outfile);
515 for (; opts->type != OPTION_END; opts++) {
519 if (opts->type == OPTION_GROUP) {
520 fputc('\n', outfile);
522 fprintf(outfile, "%s\n", opts->help);
525 if (!full && (opts->flags & PARSE_OPT_HIDDEN))
528 pos = fprintf(outfile, " ");
529 if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
530 if (opts->flags & PARSE_OPT_NODASH)
531 pos += fprintf(outfile, "%c", opts->short_name);
533 pos += fprintf(outfile, "-%c", opts->short_name);
535 if (opts->long_name && opts->short_name)
536 pos += fprintf(outfile, ", ");
538 pos += fprintf(outfile, "--%s%s",
539 (opts->flags & PARSE_OPT_NEGHELP) ? "no-" : "",
541 if (opts->type == OPTION_NUMBER)
542 pos += fprintf(outfile, "-NUM");
544 if ((opts->flags & PARSE_OPT_LITERAL_ARGHELP) ||
545 !(opts->flags & PARSE_OPT_NOARG))
546 pos += usage_argh(opts, outfile);
548 if (pos <= USAGE_OPTS_WIDTH)
549 pad = USAGE_OPTS_WIDTH - pos;
551 fputc('\n', outfile);
552 pad = USAGE_OPTS_WIDTH;
554 fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
556 fputc('\n', outfile);
558 if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
559 fputs("EOF\n", outfile);
561 return PARSE_OPT_HELP;
564 void NORETURN usage_with_options(const char * const *usagestr,
565 const struct option *opts)
567 usage_with_options_internal(NULL, usagestr, opts, 0, 1);
571 void NORETURN usage_msg_opt(const char *msg,
572 const char * const *usagestr,
573 const struct option *options)
575 fprintf(stderr, "%s\n\n", msg);
576 usage_with_options(usagestr, options);
579 static int parse_options_usage(struct parse_opt_ctx_t *ctx,
580 const char * const *usagestr,
581 const struct option *opts, int err)
583 return usage_with_options_internal(ctx, usagestr, opts, 0, err);
587 /*----- some often used options -----*/
590 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
595 v = unset ? 0 : DEFAULT_ABBREV;
597 v = strtol(arg, (char **)&arg, 10);
599 return opterror(opt, "expects a numerical value", 0);
600 if (v && v < MINIMUM_ABBREV)
605 *(int *)(opt->value) = v;
609 int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
612 *(unsigned long *)(opt->value) = approxidate(arg);
616 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
622 arg = unset ? "never" : (const char *)opt->defval;
623 value = git_config_colorbool(NULL, arg, -1);
626 "expects \"always\", \"auto\", or \"never\"", 0);
627 *(int *)opt->value = value;
631 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
634 int *target = opt->value;
637 /* --no-quiet, --no-verbose */
639 else if (opt->short_name == 'v') {
653 int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
655 unsigned char sha1[20];
656 struct commit *commit;
660 if (get_sha1(arg, sha1))
661 return error("malformed object name %s", arg);
662 commit = lookup_commit_reference(sha1);
664 return error("no such commit %s", arg);
665 commit_list_insert(commit, opt->value);
669 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
671 int *target = opt->value;
672 *target = unset ? 2 : 1;
676 int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
680 for (i = 0; i < dst_size; i++)
681 if (dst[i].type == OPTION_END)
683 for (j = 0; i < dst_size; i++, j++) {
685 if (src[j].type == OPTION_END)