1 #include "git-compat-util.h"
2 #include "parse-options.h"
9 static int opterror(const struct option *opt, const char *reason, int flags)
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);
18 static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
19 int flags, const char **arg)
24 } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
25 *arg = (const char *)opt->defval;
26 } else if (p->argc > 1) {
30 return opterror(opt, "requires a value", flags);
34 static void fix_filename(const char *prefix, const char **file)
36 if (!file || !*file || !prefix || is_absolute_path(*file)
37 || !strcmp("-", *file))
39 *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
42 static int get_value(struct parse_opt_ctx_t *p,
43 const struct option *opt, int flags)
46 const int unset = flags & OPT_UNSET;
50 return opterror(opt, "takes no value", flags);
51 if (unset && (opt->flags & PARSE_OPT_NONEG))
52 return opterror(opt, "isn't available", flags);
54 if (!(flags & OPT_SHORT) && p->opt) {
57 if (!(opt->flags & PARSE_OPT_NOARG))
65 return opterror(opt, "takes no value", flags);
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 /* negated and abbreviated very much? */
234 if (!prefixcmp("no-", arg)) {
239 if (strncmp(arg, "no-", 3))
242 rest = skip_prefix(arg + 3, options->long_name);
243 /* abbreviated and negated? */
244 if (!rest && !prefixcmp(options->long_name, arg + 3))
254 return get_value(p, options, flags);
257 if (ambiguous_option)
258 return error("Ambiguous option: %s "
259 "(could be --%s%s or --%s%s)",
261 (ambiguous_flags & OPT_UNSET) ? "no-" : "",
262 ambiguous_option->long_name,
263 (abbrev_flags & OPT_UNSET) ? "no-" : "",
264 abbrev_option->long_name);
266 return get_value(p, abbrev_option, abbrev_flags);
270 static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
271 const struct option *options)
273 for (; options->type != OPTION_END; options++) {
274 if (!(options->flags & PARSE_OPT_NODASH))
276 if ((options->flags & PARSE_OPT_OPTARG) ||
277 !(options->flags & PARSE_OPT_NOARG))
278 die("BUG: dashless options don't support arguments");
279 if (!(options->flags & PARSE_OPT_NONEG))
280 die("BUG: dashless options don't support negation");
281 if (options->long_name)
282 die("BUG: dashless options can't be long");
283 if (options->short_name == arg[0] && arg[1] == '\0')
284 return get_value(p, options, OPT_SHORT);
289 static void check_typos(const char *arg, const struct option *options)
294 if (!prefixcmp(arg, "no-")) {
295 error ("did you mean `--%s` (with two dashes ?)", arg);
299 for (; options->type != OPTION_END; options++) {
300 if (!options->long_name)
302 if (!prefixcmp(options->long_name, arg)) {
303 error ("did you mean `--%s` (with two dashes ?)", arg);
309 void parse_options_start(struct parse_opt_ctx_t *ctx,
310 int argc, const char **argv, const char *prefix,
313 memset(ctx, 0, sizeof(*ctx));
314 ctx->argc = argc - 1;
315 ctx->argv = argv + 1;
317 ctx->prefix = prefix;
318 ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
320 if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
321 (flags & PARSE_OPT_STOP_AT_NON_OPTION))
322 die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
325 static int usage_with_options_internal(const char * const *,
326 const struct option *, int);
328 int parse_options_step(struct parse_opt_ctx_t *ctx,
329 const struct option *options,
330 const char * const usagestr[])
332 int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
334 /* we must reset ->opt, unknown short option leave it dangling */
337 for (; ctx->argc; ctx->argc--, ctx->argv++) {
338 const char *arg = ctx->argv[0];
340 if (*arg != '-' || !arg[1]) {
341 if (parse_nodash_opt(ctx, arg, options) == 0)
343 if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
345 ctx->out[ctx->cpidx++] = ctx->argv[0];
351 if (internal_help && *ctx->opt == 'h')
352 return parse_options_usage(usagestr, options);
353 switch (parse_short_opt(ctx, options)) {
355 return parse_options_usage(usagestr, options);
360 check_typos(arg + 1, options);
362 if (internal_help && *ctx->opt == 'h')
363 return parse_options_usage(usagestr, options);
364 switch (parse_short_opt(ctx, options)) {
366 return parse_options_usage(usagestr, options);
368 /* fake a short option thing to hide the fact that we may have
369 * started to parse aggregated stuff
371 * This is leaky, too bad.
373 ctx->argv[0] = xstrdup(ctx->opt - 1);
374 *(char *)ctx->argv[0] = '-';
381 if (!arg[2]) { /* "--" */
382 if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
389 if (internal_help && !strcmp(arg + 2, "help-all"))
390 return usage_with_options_internal(usagestr, options, 1);
391 if (internal_help && !strcmp(arg + 2, "help"))
392 return parse_options_usage(usagestr, options);
393 switch (parse_long_opt(ctx, arg + 2, options)) {
395 return parse_options_usage(usagestr, options);
401 if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
402 return PARSE_OPT_UNKNOWN;
403 ctx->out[ctx->cpidx++] = ctx->argv[0];
406 return PARSE_OPT_DONE;
409 int parse_options_end(struct parse_opt_ctx_t *ctx)
411 memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
412 ctx->out[ctx->cpidx + ctx->argc] = NULL;
413 return ctx->cpidx + ctx->argc;
416 int parse_options(int argc, const char **argv, const char *prefix,
417 const struct option *options, const char * const usagestr[],
420 struct parse_opt_ctx_t ctx;
422 parse_options_start(&ctx, argc, argv, prefix, flags);
423 switch (parse_options_step(&ctx, options, usagestr)) {
428 default: /* PARSE_OPT_UNKNOWN */
429 if (ctx.argv[0][1] == '-') {
430 error("unknown option `%s'", ctx.argv[0] + 2);
432 error("unknown switch `%c'", *ctx.opt);
434 usage_with_options(usagestr, options);
437 return parse_options_end(&ctx);
440 static int usage_argh(const struct option *opts)
443 int literal = opts->flags & PARSE_OPT_LITERAL_ARGHELP;
444 if (opts->flags & PARSE_OPT_OPTARG)
446 s = literal ? "[=%s]" : "[=<%s>]";
448 s = literal ? "[%s]" : "[<%s>]";
450 s = literal ? " %s" : " <%s>";
451 return fprintf(stderr, s, opts->argh);
454 #define USAGE_OPTS_WIDTH 24
457 int usage_with_options_internal(const char * const *usagestr,
458 const struct option *opts, int full)
461 return PARSE_OPT_HELP;
463 fprintf(stderr, "usage: %s\n", *usagestr++);
464 while (*usagestr && **usagestr)
465 fprintf(stderr, " or: %s\n", *usagestr++);
467 fprintf(stderr, "%s%s\n",
468 **usagestr ? " " : "",
473 if (opts->type != OPTION_GROUP)
476 for (; opts->type != OPTION_END; opts++) {
480 if (opts->type == OPTION_GROUP) {
483 fprintf(stderr, "%s\n", opts->help);
486 if (!full && (opts->flags & PARSE_OPT_HIDDEN))
489 pos = fprintf(stderr, " ");
490 if (opts->short_name) {
491 if (opts->flags & PARSE_OPT_NODASH)
492 pos += fprintf(stderr, "%c", opts->short_name);
494 pos += fprintf(stderr, "-%c", opts->short_name);
496 if (opts->long_name && opts->short_name)
497 pos += fprintf(stderr, ", ");
499 pos += fprintf(stderr, "--%s", opts->long_name);
500 if (opts->type == OPTION_NUMBER)
501 pos += fprintf(stderr, "-NUM");
503 switch (opts->type) {
504 case OPTION_ARGUMENT:
507 if (opts->flags & PARSE_OPT_OPTARG)
509 pos += fprintf(stderr, "[=<n>]");
511 pos += fprintf(stderr, "[<n>]");
513 pos += fprintf(stderr, " <n>");
515 case OPTION_CALLBACK:
516 if (opts->flags & PARSE_OPT_NOARG)
519 case OPTION_FILENAME:
523 pos += usage_argh(opts);
525 if (opts->flags & PARSE_OPT_OPTARG)
527 pos += fprintf(stderr, "[=...]");
529 pos += fprintf(stderr, "[...]");
531 pos += fprintf(stderr, " ...");
534 default: /* OPTION_{BIT,BOOLEAN,NUMBER,SET_INT,SET_PTR} */
538 if (pos <= USAGE_OPTS_WIDTH)
539 pad = USAGE_OPTS_WIDTH - pos;
542 pad = USAGE_OPTS_WIDTH;
544 fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
548 return PARSE_OPT_HELP;
551 void usage_with_options(const char * const *usagestr,
552 const struct option *opts)
554 usage_with_options_internal(usagestr, opts, 0);
558 int parse_options_usage(const char * const *usagestr,
559 const struct option *opts)
561 return usage_with_options_internal(usagestr, opts, 0);
565 /*----- some often used options -----*/
568 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
573 v = unset ? 0 : DEFAULT_ABBREV;
575 v = strtol(arg, (char **)&arg, 10);
577 return opterror(opt, "expects a numerical value", 0);
578 if (v && v < MINIMUM_ABBREV)
583 *(int *)(opt->value) = v;
587 int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
590 *(unsigned long *)(opt->value) = approxidate(arg);
594 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
597 int *target = opt->value;
600 /* --no-quiet, --no-verbose */
602 else if (opt->short_name == 'v') {
616 int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
618 unsigned char sha1[20];
619 struct commit *commit;
623 if (get_sha1(arg, sha1))
624 return error("malformed object name %s", arg);
625 commit = lookup_commit_reference(sha1);
627 return error("no such commit %s", arg);
628 commit_list_insert(commit, opt->value);