Andrew's git - gitweb.git/blob

79c56f32f92acc2dc28694f8d8bbcd0b59c3ebba
   1#include "git-compat-util.h"
   2#include "parse-options.h"
   3#include "cache.h"
   4#include "commit.h"
   5#include "color.h"
   6
   7static int parse_options_usage(struct parse_opt_ctx_t *ctx,
   8                               const char * const *usagestr,
   9                               const struct option *opts, int err);
  10
  11#define OPT_SHORT 1
  12#define OPT_UNSET 2
  13
  14static int optbug(const struct option *opt, const char *reason)
  15{
  16        if (opt->long_name)
  17                return error("BUG: option '%s' %s", opt->long_name, reason);
  18        return error("BUG: switch '%c' %s", opt->short_name, reason);
  19}
  20
  21static int opterror(const struct option *opt, const char *reason, int flags)
  22{
  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);
  28}
  29
  30static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  31                   int flags, const char **arg)
  32{
  33        if (p->opt) {
  34                *arg = p->opt;
  35                p->opt = NULL;
  36        } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
  37                *arg = (const char *)opt->defval;
  38        } else if (p->argc > 1) {
  39                p->argc--;
  40                *arg = *++p->argv;
  41        } else
  42                return opterror(opt, "requires a value", flags);
  43        return 0;
  44}
  45
  46static void fix_filename(const char *prefix, const char **file)
  47{
  48        if (!file || !*file || !prefix || is_absolute_path(*file)
  49            || !strcmp("-", *file))
  50                return;
  51        *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
  52}
  53
  54static int get_value(struct parse_opt_ctx_t *p,
  55                     const struct option *opt, int flags)
  56{
  57        const char *s, *arg;
  58        const int unset = flags & OPT_UNSET;
  59        int err;
  60
  61        if (unset && p->opt)
  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
  66        if (!(flags & OPT_SHORT) && p->opt) {
  67                switch (opt->type) {
  68                case OPTION_CALLBACK:
  69                        if (!(opt->flags & PARSE_OPT_NOARG))
  70                                break;
  71                        /* FALLTHROUGH */
  72                case OPTION_BOOLEAN:
  73                case OPTION_BIT:
  74                case OPTION_NEGBIT:
  75                case OPTION_SET_INT:
  76                case OPTION_SET_PTR:
  77                        return opterror(opt, "takes no value", flags);
  78                default:
  79                        break;
  80                }
  81        }
  82
  83        switch (opt->type) {
  84        case OPTION_BIT:
  85                if (unset)
  86                        *(int *)opt->value &= ~opt->defval;
  87                else
  88                        *(int *)opt->value |= opt->defval;
  89                return 0;
  90
  91        case OPTION_NEGBIT:
  92                if (unset)
  93                        *(int *)opt->value |= opt->defval;
  94                else
  95                        *(int *)opt->value &= ~opt->defval;
  96                return 0;
  97
  98        case OPTION_BOOLEAN:
  99                *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
 100                return 0;
 101
 102        case OPTION_SET_INT:
 103                *(int *)opt->value = unset ? 0 : opt->defval;
 104                return 0;
 105
 106        case OPTION_SET_PTR:
 107                *(void **)opt->value = unset ? NULL : (void *)opt->defval;
 108                return 0;
 109
 110        case OPTION_STRING:
 111                if (unset)
 112                        *(const char **)opt->value = NULL;
 113                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 114                        *(const char **)opt->value = (const char *)opt->defval;
 115                else
 116                        return get_arg(p, opt, flags, (const char **)opt->value);
 117                return 0;
 118
 119        case OPTION_FILENAME:
 120                err = 0;
 121                if (unset)
 122                        *(const char **)opt->value = NULL;
 123                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 124                        *(const char **)opt->value = (const char *)opt->defval;
 125                else
 126                        err = get_arg(p, opt, flags, (const char **)opt->value);
 127
 128                if (!err)
 129                        fix_filename(p->prefix, (const char **)opt->value);
 130                return err;
 131
 132        case OPTION_CALLBACK:
 133                if (unset)
 134                        return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 135                if (opt->flags & PARSE_OPT_NOARG)
 136                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 137                if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 138                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 139                if (get_arg(p, opt, flags, &arg))
 140                        return -1;
 141                return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 142
 143        case OPTION_INTEGER:
 144                if (unset) {
 145                        *(int *)opt->value = 0;
 146                        return 0;
 147                }
 148                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 149                        *(int *)opt->value = opt->defval;
 150                        return 0;
 151                }
 152                if (get_arg(p, opt, flags, &arg))
 153                        return -1;
 154                *(int *)opt->value = strtol(arg, (char **)&s, 10);
 155                if (*s)
 156                        return opterror(opt, "expects a numerical value", flags);
 157                return 0;
 158
 159        default:
 160                die("should not happen, someone must be hit on the forehead");
 161        }
 162}
 163
 164static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 165{
 166        const struct option *numopt = NULL;
 167
 168        for (; options->type != OPTION_END; options++) {
 169                if (options->short_name == *p->opt) {
 170                        p->opt = p->opt[1] ? p->opt + 1 : NULL;
 171                        return get_value(p, options, OPT_SHORT);
 172                }
 173
 174                /*
 175                 * Handle the numerical option later, explicit one-digit
 176                 * options take precedence over it.
 177                 */
 178                if (options->type == OPTION_NUMBER)
 179                        numopt = options;
 180        }
 181        if (numopt && isdigit(*p->opt)) {
 182                size_t len = 1;
 183                char *arg;
 184                int rc;
 185
 186                while (isdigit(p->opt[len]))
 187                        len++;
 188                arg = xmemdupz(p->opt, len);
 189                p->opt = p->opt[len] ? p->opt + len : NULL;
 190                rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
 191                free(arg);
 192                return rc;
 193        }
 194        return -2;
 195}
 196
 197static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 198                          const struct option *options)
 199{
 200        const char *arg_end = strchr(arg, '=');
 201        const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 202        int abbrev_flags = 0, ambiguous_flags = 0;
 203
 204        if (!arg_end)
 205                arg_end = arg + strlen(arg);
 206
 207        for (; options->type != OPTION_END; options++) {
 208                const char *rest;
 209                int flags = 0;
 210
 211                if (!options->long_name)
 212                        continue;
 213
 214                rest = skip_prefix(arg, options->long_name);
 215                if (options->type == OPTION_ARGUMENT) {
 216                        if (!rest)
 217                                continue;
 218                        if (*rest == '=')
 219                                return opterror(options, "takes no value", flags);
 220                        if (*rest)
 221                                continue;
 222                        p->out[p->cpidx++] = arg - 2;
 223                        return 0;
 224                }
 225                if (!rest) {
 226                        /* abbreviated? */
 227                        if (!strncmp(options->long_name, arg, arg_end - arg)) {
 228is_abbreviated:
 229                                if (abbrev_option) {
 230                                        /*
 231                                         * If this is abbreviated, it is
 232                                         * ambiguous. So when there is no
 233                                         * exact match later, we need to
 234                                         * error out.
 235                                         */
 236                                        ambiguous_option = abbrev_option;
 237                                        ambiguous_flags = abbrev_flags;
 238                                }
 239                                if (!(flags & OPT_UNSET) && *arg_end)
 240                                        p->opt = arg_end + 1;
 241                                abbrev_option = options;
 242                                abbrev_flags = flags;
 243                                continue;
 244                        }
 245                        /* negation allowed? */
 246                        if (options->flags & PARSE_OPT_NONEG)
 247                                continue;
 248                        /* negated and abbreviated very much? */
 249                        if (!prefixcmp("no-", arg)) {
 250                                flags |= OPT_UNSET;
 251                                goto is_abbreviated;
 252                        }
 253                        /* negated? */
 254                        if (strncmp(arg, "no-", 3))
 255                                continue;
 256                        flags |= OPT_UNSET;
 257                        rest = skip_prefix(arg + 3, options->long_name);
 258                        /* abbreviated and negated? */
 259                        if (!rest && !prefixcmp(options->long_name, arg + 3))
 260                                goto is_abbreviated;
 261                        if (!rest)
 262                                continue;
 263                }
 264                if (*rest) {
 265                        if (*rest != '=')
 266                                continue;
 267                        p->opt = rest + 1;
 268                }
 269                return get_value(p, options, flags);
 270        }
 271
 272        if (ambiguous_option)
 273                return error("Ambiguous option: %s "
 274                        "(could be --%s%s or --%s%s)",
 275                        arg,
 276                        (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 277                        ambiguous_option->long_name,
 278                        (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 279                        abbrev_option->long_name);
 280        if (abbrev_option)
 281                return get_value(p, abbrev_option, abbrev_flags);
 282        return -2;
 283}
 284
 285static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
 286                            const struct option *options)
 287{
 288        for (; options->type != OPTION_END; options++) {
 289                if (!(options->flags & PARSE_OPT_NODASH))
 290                        continue;
 291                if (options->short_name == arg[0] && arg[1] == '\0')
 292                        return get_value(p, options, OPT_SHORT);
 293        }
 294        return -2;
 295}
 296
 297static void check_typos(const char *arg, const struct option *options)
 298{
 299        if (strlen(arg) < 3)
 300                return;
 301
 302        if (!prefixcmp(arg, "no-")) {
 303                error ("did you mean `--%s` (with two dashes ?)", arg);
 304                exit(129);
 305        }
 306
 307        for (; options->type != OPTION_END; options++) {
 308                if (!options->long_name)
 309                        continue;
 310                if (!prefixcmp(options->long_name, arg)) {
 311                        error ("did you mean `--%s` (with two dashes ?)", arg);
 312                        exit(129);
 313                }
 314        }
 315}
 316
 317static void parse_options_check(const struct option *opts)
 318{
 319        int err = 0;
 320
 321        for (; opts->type != OPTION_END; opts++) {
 322                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
 323                    (opts->flags & PARSE_OPT_OPTARG))
 324                        err |= optbug(opts, "uses incompatible flags "
 325                                        "LASTARG_DEFAULT and OPTARG");
 326                if (opts->flags & PARSE_OPT_NODASH &&
 327                    ((opts->flags & PARSE_OPT_OPTARG) ||
 328                     !(opts->flags & PARSE_OPT_NOARG) ||
 329                     !(opts->flags & PARSE_OPT_NONEG) ||
 330                     opts->long_name))
 331                        err |= optbug(opts, "uses feature "
 332                                        "not supported for dashless options");
 333                switch (opts->type) {
 334                case OPTION_BOOLEAN:
 335                case OPTION_BIT:
 336                case OPTION_NEGBIT:
 337                case OPTION_SET_INT:
 338                case OPTION_SET_PTR:
 339                case OPTION_NUMBER:
 340                        if ((opts->flags & PARSE_OPT_OPTARG) ||
 341                            !(opts->flags & PARSE_OPT_NOARG))
 342                                err |= optbug(opts, "should not accept an argument");
 343                default:
 344                        ; /* ok. (usually accepts an argument) */
 345                }
 346        }
 347        if (err)
 348                exit(128);
 349}
 350
 351void parse_options_start(struct parse_opt_ctx_t *ctx,
 352                         int argc, const char **argv, const char *prefix,
 353                         const struct option *options, int flags)
 354{
 355        memset(ctx, 0, sizeof(*ctx));
 356        ctx->argc = argc - 1;
 357        ctx->argv = argv + 1;
 358        ctx->out  = argv;
 359        ctx->prefix = prefix;
 360        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 361        ctx->flags = flags;
 362        if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 363            (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 364                die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 365        parse_options_check(options);
 366}
 367
 368static int usage_with_options_internal(struct parse_opt_ctx_t *,
 369                                       const char * const *,
 370                                       const struct option *, int, int);
 371
 372int parse_options_step(struct parse_opt_ctx_t *ctx,
 373                       const struct option *options,
 374                       const char * const usagestr[])
 375{
 376        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 377
 378        /* we must reset ->opt, unknown short option leave it dangling */
 379        ctx->opt = NULL;
 380
 381        for (; ctx->argc; ctx->argc--, ctx->argv++) {
 382                const char *arg = ctx->argv[0];
 383
 384                if (*arg != '-' || !arg[1]) {
 385                        if (parse_nodash_opt(ctx, arg, options) == 0)
 386                                continue;
 387                        if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 388                                break;
 389                        ctx->out[ctx->cpidx++] = ctx->argv[0];
 390                        continue;
 391                }
 392
 393                if (arg[1] != '-') {
 394                        ctx->opt = arg + 1;
 395                        if (internal_help && *ctx->opt == 'h')
 396                                return parse_options_usage(ctx, usagestr, options, 0);
 397                        switch (parse_short_opt(ctx, options)) {
 398                        case -1:
 399                                return parse_options_usage(ctx, usagestr, options, 1);
 400                        case -2:
 401                                goto unknown;
 402                        }
 403                        if (ctx->opt)
 404                                check_typos(arg + 1, options);
 405                        while (ctx->opt) {
 406                                if (internal_help && *ctx->opt == 'h')
 407                                        return parse_options_usage(ctx, usagestr, options, 0);
 408                                switch (parse_short_opt(ctx, options)) {
 409                                case -1:
 410                                        return parse_options_usage(ctx, usagestr, options, 1);
 411                                case -2:
 412                                        /* fake a short option thing to hide the fact that we may have
 413                                         * started to parse aggregated stuff
 414                                         *
 415                                         * This is leaky, too bad.
 416                                         */
 417                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 418                                        *(char *)ctx->argv[0] = '-';
 419                                        goto unknown;
 420                                }
 421                        }
 422                        continue;
 423                }
 424
 425                if (!arg[2]) { /* "--" */
 426                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 427                                ctx->argc--;
 428                                ctx->argv++;
 429                        }
 430                        break;
 431                }
 432
 433                if (internal_help && !strcmp(arg + 2, "help-all"))
 434                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 435                if (internal_help && !strcmp(arg + 2, "help"))
 436                        return parse_options_usage(ctx, usagestr, options, 0);
 437                switch (parse_long_opt(ctx, arg + 2, options)) {
 438                case -1:
 439                        return parse_options_usage(ctx, usagestr, options, 1);
 440                case -2:
 441                        goto unknown;
 442                }
 443                continue;
 444unknown:
 445                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 446                        return PARSE_OPT_UNKNOWN;
 447                ctx->out[ctx->cpidx++] = ctx->argv[0];
 448                ctx->opt = NULL;
 449        }
 450        return PARSE_OPT_DONE;
 451}
 452
 453int parse_options_end(struct parse_opt_ctx_t *ctx)
 454{
 455        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 456        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 457        return ctx->cpidx + ctx->argc;
 458}
 459
 460int parse_options(int argc, const char **argv, const char *prefix,
 461                  const struct option *options, const char * const usagestr[],
 462                  int flags)
 463{
 464        struct parse_opt_ctx_t ctx;
 465
 466        parse_options_start(&ctx, argc, argv, prefix, options, flags);
 467        switch (parse_options_step(&ctx, options, usagestr)) {
 468        case PARSE_OPT_HELP:
 469                exit(129);
 470        case PARSE_OPT_DONE:
 471                break;
 472        default: /* PARSE_OPT_UNKNOWN */
 473                if (ctx.argv[0][1] == '-') {
 474                        error("unknown option `%s'", ctx.argv[0] + 2);
 475                } else {
 476                        error("unknown switch `%c'", *ctx.opt);
 477                }
 478                usage_with_options(usagestr, options);
 479        }
 480
 481        return parse_options_end(&ctx);
 482}
 483
 484static int usage_argh(const struct option *opts, FILE *outfile)
 485{
 486        const char *s;
 487        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 488        if (opts->flags & PARSE_OPT_OPTARG)
 489                if (opts->long_name)
 490                        s = literal ? "[=%s]" : "[=<%s>]";
 491                else
 492                        s = literal ? "[%s]" : "[<%s>]";
 493        else
 494                s = literal ? " %s" : " <%s>";
 495        return fprintf(outfile, s, opts->argh ? opts->argh : "...");
 496}
 497
 498#define USAGE_OPTS_WIDTH 24
 499#define USAGE_GAP         2
 500
 501static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 502                                       const char * const *usagestr,
 503                                       const struct option *opts, int full, int err)
 504{
 505        FILE *outfile = err ? stderr : stdout;
 506
 507        if (!usagestr)
 508                return PARSE_OPT_HELP;
 509
 510        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 511                fprintf(outfile, "cat <<\\EOF\n");
 512
 513        fprintf(outfile, "usage: %s\n", *usagestr++);
 514        while (*usagestr && **usagestr)
 515                fprintf(outfile, "   or: %s\n", *usagestr++);
 516        while (*usagestr) {
 517                fprintf(outfile, "%s%s\n",
 518                                **usagestr ? "    " : "",
 519                                *usagestr);
 520                usagestr++;
 521        }
 522
 523        if (opts->type != OPTION_GROUP)
 524                fputc('\n', outfile);
 525
 526        for (; opts->type != OPTION_END; opts++) {
 527                size_t pos;
 528                int pad;
 529
 530                if (opts->type == OPTION_GROUP) {
 531                        fputc('\n', outfile);
 532                        if (*opts->help)
 533                                fprintf(outfile, "%s\n", opts->help);
 534                        continue;
 535                }
 536                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 537                        continue;
 538
 539                pos = fprintf(outfile, "    ");
 540                if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
 541                        if (opts->flags & PARSE_OPT_NODASH)
 542                                pos += fprintf(outfile, "%c", opts->short_name);
 543                        else
 544                                pos += fprintf(outfile, "-%c", opts->short_name);
 545                }
 546                if (opts->long_name && opts->short_name)
 547                        pos += fprintf(outfile, ", ");
 548                if (opts->long_name)
 549                        pos += fprintf(outfile, "--%s%s",
 550                                (opts->flags & PARSE_OPT_NEGHELP) ?  "no-" : "",
 551                                opts->long_name);
 552                if (opts->type == OPTION_NUMBER)
 553                        pos += fprintf(outfile, "-NUM");
 554
 555                if (!(opts->flags & PARSE_OPT_NOARG))
 556                        pos += usage_argh(opts, outfile);
 557
 558                if (pos <= USAGE_OPTS_WIDTH)
 559                        pad = USAGE_OPTS_WIDTH - pos;
 560                else {
 561                        fputc('\n', outfile);
 562                        pad = USAGE_OPTS_WIDTH;
 563                }
 564                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
 565        }
 566        fputc('\n', outfile);
 567
 568        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 569                fputs("EOF\n", outfile);
 570
 571        return PARSE_OPT_HELP;
 572}
 573
 574void usage_with_options(const char * const *usagestr,
 575                        const struct option *opts)
 576{
 577        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 578        exit(129);
 579}
 580
 581void usage_msg_opt(const char *msg,
 582                   const char * const *usagestr,
 583                   const struct option *options)
 584{
 585        fprintf(stderr, "%s\n\n", msg);
 586        usage_with_options(usagestr, options);
 587}
 588
 589static int parse_options_usage(struct parse_opt_ctx_t *ctx,
 590                               const char * const *usagestr,
 591                               const struct option *opts, int err)
 592{
 593        return usage_with_options_internal(ctx, usagestr, opts, 0, err);
 594}
 595
 596
 597/*----- some often used options -----*/
 598#include "cache.h"
 599
 600int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
 601{
 602        int v;
 603
 604        if (!arg) {
 605                v = unset ? 0 : DEFAULT_ABBREV;
 606        } else {
 607                v = strtol(arg, (char **)&arg, 10);
 608                if (*arg)
 609                        return opterror(opt, "expects a numerical value", 0);
 610                if (v && v < MINIMUM_ABBREV)
 611                        v = MINIMUM_ABBREV;
 612                else if (v > 40)
 613                        v = 40;
 614        }
 615        *(int *)(opt->value) = v;
 616        return 0;
 617}
 618
 619int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
 620                             int unset)
 621{
 622        *(unsigned long *)(opt->value) = approxidate(arg);
 623        return 0;
 624}
 625
 626int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
 627                            int unset)
 628{
 629        int value;
 630
 631        if (!arg)
 632                arg = unset ? "never" : (const char *)opt->defval;
 633        value = git_config_colorbool(NULL, arg, -1);
 634        if (value < 0)
 635                return opterror(opt,
 636                        "expects \"always\", \"auto\", or \"never\"", 0);
 637        *(int *)opt->value = value;
 638        return 0;
 639}
 640
 641int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
 642                           int unset)
 643{
 644        int *target = opt->value;
 645
 646        if (unset)
 647                /* --no-quiet, --no-verbose */
 648                *target = 0;
 649        else if (opt->short_name == 'v') {
 650                if (*target >= 0)
 651                        (*target)++;
 652                else
 653                        *target = 1;
 654        } else {
 655                if (*target <= 0)
 656                        (*target)--;
 657                else
 658                        *target = -1;
 659        }
 660        return 0;
 661}
 662
 663int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
 664{
 665        unsigned char sha1[20];
 666        struct commit *commit;
 667
 668        if (!arg)
 669                return -1;
 670        if (get_sha1(arg, sha1))
 671                return error("malformed object name %s", arg);
 672        commit = lookup_commit_reference(sha1);
 673        if (!commit)
 674                return error("no such commit %s", arg);
 675        commit_list_insert(commit, opt->value);
 676        return 0;
 677}
 678
 679int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 680{
 681        int *target = opt->value;
 682        *target = unset ? 2 : 1;
 683        return 0;
 684}
 685
 686int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
 687{
 688        int i, j;
 689
 690        for (i = 0; i < dst_size; i++)
 691                if (dst[i].type == OPTION_END)
 692                        break;
 693        for (j = 0; i < dst_size; i++, j++) {
 694                dst[i] = src[j];
 695                if (src[j].type == OPTION_END)
 696                        return 0;
 697        }
 698        return -1;
 699}