Andrew's git / gitweb.git / builtin/rev-parse.c
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builtin / rev-parse.con commit t7810: avoid unportable use of "echo" (93d5e0c)
   1/*
   2 * rev-parse.c
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "cache.h"
   7#include "commit.h"
   8#include "refs.h"
   9#include "quote.h"
  10#include "builtin.h"
  11#include "parse-options.h"
  12
  13#define DO_REVS         1
  14#define DO_NOREV        2
  15#define DO_FLAGS        4
  16#define DO_NONFLAGS     8
  17static int filter = ~0;
  18
  19static const char *def;
  20
  21#define NORMAL 0
  22#define REVERSED 1
  23static int show_type = NORMAL;
  24
  25#define SHOW_SYMBOLIC_ASIS 1
  26#define SHOW_SYMBOLIC_FULL 2
  27static int symbolic;
  28static int abbrev;
  29static int abbrev_ref;
  30static int abbrev_ref_strict;
  31static int output_sq;
  32
  33/*
  34 * Some arguments are relevant "revision" arguments,
  35 * others are about output format or other details.
  36 * This sorts it all out.
  37 */
  38static int is_rev_argument(const char *arg)
  39{
  40        static const char *rev_args[] = {
  41                "--all",
  42                "--bisect",
  43                "--dense",
  44                "--branches=",
  45                "--branches",
  46                "--header",
  47                "--max-age=",
  48                "--max-count=",
  49                "--min-age=",
  50                "--no-merges",
  51                "--min-parents=",
  52                "--no-min-parents",
  53                "--max-parents=",
  54                "--no-max-parents",
  55                "--objects",
  56                "--objects-edge",
  57                "--parents",
  58                "--pretty",
  59                "--remotes=",
  60                "--remotes",
  61                "--glob=",
  62                "--sparse",
  63                "--tags=",
  64                "--tags",
  65                "--topo-order",
  66                "--date-order",
  67                "--unpacked",
  68                NULL
  69        };
  70        const char **p = rev_args;
  71
  72        /* accept -<digit>, like traditional "head" */
  73        if ((*arg == '-') && isdigit(arg[1]))
  74                return 1;
  75
  76        for (;;) {
  77                const char *str = *p++;
  78                int len;
  79                if (!str)
  80                        return 0;
  81                len = strlen(str);
  82                if (!strcmp(arg, str) ||
  83                    (str[len-1] == '=' && !strncmp(arg, str, len)))
  84                        return 1;
  85        }
  86}
  87
  88/* Output argument as a string, either SQ or normal */
  89static void show(const char *arg)
  90{
  91        if (output_sq) {
  92                int sq = '\'', ch;
  93
  94                putchar(sq);
  95                while ((ch = *arg++)) {
  96                        if (ch == sq)
  97                                fputs("'\\'", stdout);
  98                        putchar(ch);
  99                }
 100                putchar(sq);
 101                putchar(' ');
 102        }
 103        else
 104                puts(arg);
 105}
 106
 107/* Like show(), but with a negation prefix according to type */
 108static void show_with_type(int type, const char *arg)
 109{
 110        if (type != show_type)
 111                putchar('^');
 112        show(arg);
 113}
 114
 115/* Output a revision, only if filter allows it */
 116static void show_rev(int type, const unsigned char *sha1, const char *name)
 117{
 118        if (!(filter & DO_REVS))
 119                return;
 120        def = NULL;
 121
 122        if ((symbolic || abbrev_ref) && name) {
 123                if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
 124                        unsigned char discard[20];
 125                        char *full;
 126
 127                        switch (dwim_ref(name, strlen(name), discard, &full)) {
 128                        case 0:
 129                                /*
 130                                 * Not found -- not a ref.  We could
 131                                 * emit "name" here, but symbolic-full
 132                                 * users are interested in finding the
 133                                 * refs spelled in full, and they would
 134                                 * need to filter non-refs if we did so.
 135                                 */
 136                                break;
 137                        case 1: /* happy */
 138                                if (abbrev_ref)
 139                                        full = shorten_unambiguous_ref(full,
 140                                                abbrev_ref_strict);
 141                                show_with_type(type, full);
 142                                break;
 143                        default: /* ambiguous */
 144                                error("refname '%s' is ambiguous", name);
 145                                break;
 146                        }
 147                } else {
 148                        show_with_type(type, name);
 149                }
 150        }
 151        else if (abbrev)
 152                show_with_type(type, find_unique_abbrev(sha1, abbrev));
 153        else
 154                show_with_type(type, sha1_to_hex(sha1));
 155}
 156
 157/* Output a flag, only if filter allows it. */
 158static int show_flag(const char *arg)
 159{
 160        if (!(filter & DO_FLAGS))
 161                return 0;
 162        if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
 163                show(arg);
 164                return 1;
 165        }
 166        return 0;
 167}
 168
 169static int show_default(void)
 170{
 171        const char *s = def;
 172
 173        if (s) {
 174                unsigned char sha1[20];
 175
 176                def = NULL;
 177                if (!get_sha1(s, sha1)) {
 178                        show_rev(NORMAL, sha1, s);
 179                        return 1;
 180                }
 181        }
 182        return 0;
 183}
 184
 185static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 186{
 187        show_rev(NORMAL, sha1, refname);
 188        return 0;
 189}
 190
 191static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 192{
 193        show_rev(REVERSED, sha1, refname);
 194        return 0;
 195}
 196
 197static void show_datestring(const char *flag, const char *datestr)
 198{
 199        static char buffer[100];
 200
 201        /* date handling requires both flags and revs */
 202        if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
 203                return;
 204        snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
 205        show(buffer);
 206}
 207
 208static int show_file(const char *arg)
 209{
 210        show_default();
 211        if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
 212                show(arg);
 213                return 1;
 214        }
 215        return 0;
 216}
 217
 218static int try_difference(const char *arg)
 219{
 220        char *dotdot;
 221        unsigned char sha1[20];
 222        unsigned char end[20];
 223        const char *next;
 224        const char *this;
 225        int symmetric;
 226
 227        if (!(dotdot = strstr(arg, "..")))
 228                return 0;
 229        next = dotdot + 2;
 230        this = arg;
 231        symmetric = (*next == '.');
 232
 233        *dotdot = 0;
 234        next += symmetric;
 235
 236        if (!*next)
 237                next = "HEAD";
 238        if (dotdot == arg)
 239                this = "HEAD";
 240        if (!get_sha1(this, sha1) && !get_sha1(next, end)) {
 241                show_rev(NORMAL, end, next);
 242                show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
 243                if (symmetric) {
 244                        struct commit_list *exclude;
 245                        struct commit *a, *b;
 246                        a = lookup_commit_reference(sha1);
 247                        b = lookup_commit_reference(end);
 248                        exclude = get_merge_bases(a, b, 1);
 249                        while (exclude) {
 250                                struct commit_list *n = exclude->next;
 251                                show_rev(REVERSED,
 252                                         exclude->item->object.sha1,NULL);
 253                                free(exclude);
 254                                exclude = n;
 255                        }
 256                }
 257                return 1;
 258        }
 259        *dotdot = '.';
 260        return 0;
 261}
 262
 263static int try_parent_shorthands(const char *arg)
 264{
 265        char *dotdot;
 266        unsigned char sha1[20];
 267        struct commit *commit;
 268        struct commit_list *parents;
 269        int parents_only;
 270
 271        if ((dotdot = strstr(arg, "^!")))
 272                parents_only = 0;
 273        else if ((dotdot = strstr(arg, "^@")))
 274                parents_only = 1;
 275
 276        if (!dotdot || dotdot[2])
 277                return 0;
 278
 279        *dotdot = 0;
 280        if (get_sha1(arg, sha1))
 281                return 0;
 282
 283        if (!parents_only)
 284                show_rev(NORMAL, sha1, arg);
 285        commit = lookup_commit_reference(sha1);
 286        for (parents = commit->parents; parents; parents = parents->next)
 287                show_rev(parents_only ? NORMAL : REVERSED,
 288                                parents->item->object.sha1, arg);
 289
 290        return 1;
 291}
 292
 293static int parseopt_dump(const struct option *o, const char *arg, int unset)
 294{
 295        struct strbuf *parsed = o->value;
 296        if (unset)
 297                strbuf_addf(parsed, " --no-%s", o->long_name);
 298        else if (o->short_name)
 299                strbuf_addf(parsed, " -%c", o->short_name);
 300        else
 301                strbuf_addf(parsed, " --%s", o->long_name);
 302        if (arg) {
 303                strbuf_addch(parsed, ' ');
 304                sq_quote_buf(parsed, arg);
 305        }
 306        return 0;
 307}
 308
 309static const char *skipspaces(const char *s)
 310{
 311        while (isspace(*s))
 312                s++;
 313        return s;
 314}
 315
 316static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 317{
 318        static int keep_dashdash = 0, stop_at_non_option = 0;
 319        static char const * const parseopt_usage[] = {
 320                "git rev-parse --parseopt [options] -- [<args>...]",
 321                NULL
 322        };
 323        static struct option parseopt_opts[] = {
 324                OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
 325                                        "keep the `--` passed as an arg"),
 326                OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
 327                                        "stop parsing after the "
 328                                        "first non-option argument"),
 329                OPT_END(),
 330        };
 331
 332        struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
 333        const char **usage = NULL;
 334        struct option *opts = NULL;
 335        int onb = 0, osz = 0, unb = 0, usz = 0;
 336
 337        strbuf_addstr(&parsed, "set --");
 338        argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
 339                             PARSE_OPT_KEEP_DASHDASH);
 340        if (argc < 1 || strcmp(argv[0], "--"))
 341                usage_with_options(parseopt_usage, parseopt_opts);
 342
 343        /* get the usage up to the first line with a -- on it */
 344        for (;;) {
 345                if (strbuf_getline(&sb, stdin, '\n') == EOF)
 346                        die("premature end of input");
 347                ALLOC_GROW(usage, unb + 1, usz);
 348                if (!strcmp("--", sb.buf)) {
 349                        if (unb < 1)
 350                                die("no usage string given before the `--' separator");
 351                        usage[unb] = NULL;
 352                        break;
 353                }
 354                usage[unb++] = strbuf_detach(&sb, NULL);
 355        }
 356
 357        /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
 358        while (strbuf_getline(&sb, stdin, '\n') != EOF) {
 359                const char *s;
 360                struct option *o;
 361
 362                if (!sb.len)
 363                        continue;
 364
 365                ALLOC_GROW(opts, onb + 1, osz);
 366                memset(opts + onb, 0, sizeof(opts[onb]));
 367
 368                o = &opts[onb++];
 369                s = strchr(sb.buf, ' ');
 370                if (!s || *sb.buf == ' ') {
 371                        o->type = OPTION_GROUP;
 372                        o->help = xstrdup(skipspaces(sb.buf));
 373                        continue;
 374                }
 375
 376                o->type = OPTION_CALLBACK;
 377                o->help = xstrdup(skipspaces(s));
 378                o->value = &parsed;
 379                o->flags = PARSE_OPT_NOARG;
 380                o->callback = &parseopt_dump;
 381                while (s > sb.buf && strchr("*=?!", s[-1])) {
 382                        switch (*--s) {
 383                        case '=':
 384                                o->flags &= ~PARSE_OPT_NOARG;
 385                                break;
 386                        case '?':
 387                                o->flags &= ~PARSE_OPT_NOARG;
 388                                o->flags |= PARSE_OPT_OPTARG;
 389                                break;
 390                        case '!':
 391                                o->flags |= PARSE_OPT_NONEG;
 392                                break;
 393                        case '*':
 394                                o->flags |= PARSE_OPT_HIDDEN;
 395                                break;
 396                        }
 397                }
 398
 399                if (s - sb.buf == 1) /* short option only */
 400                        o->short_name = *sb.buf;
 401                else if (sb.buf[1] != ',') /* long option only */
 402                        o->long_name = xmemdupz(sb.buf, s - sb.buf);
 403                else {
 404                        o->short_name = *sb.buf;
 405                        o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
 406                }
 407        }
 408        strbuf_release(&sb);
 409
 410        /* put an OPT_END() */
 411        ALLOC_GROW(opts, onb + 1, osz);
 412        memset(opts + onb, 0, sizeof(opts[onb]));
 413        argc = parse_options(argc, argv, prefix, opts, usage,
 414                        (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
 415                        (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
 416                        PARSE_OPT_SHELL_EVAL);
 417
 418        strbuf_addf(&parsed, " --");
 419        sq_quote_argv(&parsed, argv, 0);
 420        puts(parsed.buf);
 421        return 0;
 422}
 423
 424static int cmd_sq_quote(int argc, const char **argv)
 425{
 426        struct strbuf buf = STRBUF_INIT;
 427
 428        if (argc)
 429                sq_quote_argv(&buf, argv, 0);
 430        printf("%s\n", buf.buf);
 431        strbuf_release(&buf);
 432
 433        return 0;
 434}
 435
 436static void die_no_single_rev(int quiet)
 437{
 438        if (quiet)
 439                exit(1);
 440        else
 441                die("Needed a single revision");
 442}
 443
 444static const char builtin_rev_parse_usage[] =
 445"git rev-parse --parseopt [options] -- [<args>...]\n"
 446"   or: git rev-parse --sq-quote [<arg>...]\n"
 447"   or: git rev-parse [options] [<arg>...]\n"
 448"\n"
 449"Run \"git rev-parse --parseopt -h\" for more information on the first usage.";
 450
 451int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 452{
 453        int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
 454        unsigned char sha1[20];
 455        const char *name = NULL;
 456
 457        if (argc > 1 && !strcmp("--parseopt", argv[1]))
 458                return cmd_parseopt(argc - 1, argv + 1, prefix);
 459
 460        if (argc > 1 && !strcmp("--sq-quote", argv[1]))
 461                return cmd_sq_quote(argc - 2, argv + 2);
 462
 463        if (argc == 2 && !strcmp("--local-env-vars", argv[1])) {
 464                int i;
 465                for (i = 0; local_repo_env[i]; i++)
 466                        printf("%s\n", local_repo_env[i]);
 467                return 0;
 468        }
 469
 470        if (argc > 1 && !strcmp("-h", argv[1]))
 471                usage(builtin_rev_parse_usage);
 472
 473        prefix = setup_git_directory();
 474        git_config(git_default_config, NULL);
 475        for (i = 1; i < argc; i++) {
 476                const char *arg = argv[i];
 477
 478                if (as_is) {
 479                        if (show_file(arg) && as_is < 2)
 480                                verify_filename(prefix, arg);
 481                        continue;
 482                }
 483                if (!strcmp(arg,"-n")) {
 484                        if (++i >= argc)
 485                                die("-n requires an argument");
 486                        if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
 487                                show(arg);
 488                                show(argv[i]);
 489                        }
 490                        continue;
 491                }
 492                if (!prefixcmp(arg, "-n")) {
 493                        if ((filter & DO_FLAGS) && (filter & DO_REVS))
 494                                show(arg);
 495                        continue;
 496                }
 497
 498                if (*arg == '-') {
 499                        if (!strcmp(arg, "--")) {
 500                                as_is = 2;
 501                                /* Pass on the "--" if we show anything but files.. */
 502                                if (filter & (DO_FLAGS | DO_REVS))
 503                                        show_file(arg);
 504                                continue;
 505                        }
 506                        if (!strcmp(arg, "--default")) {
 507                                def = argv[i+1];
 508                                i++;
 509                                continue;
 510                        }
 511                        if (!strcmp(arg, "--revs-only")) {
 512                                filter &= ~DO_NOREV;
 513                                continue;
 514                        }
 515                        if (!strcmp(arg, "--no-revs")) {
 516                                filter &= ~DO_REVS;
 517                                continue;
 518                        }
 519                        if (!strcmp(arg, "--flags")) {
 520                                filter &= ~DO_NONFLAGS;
 521                                continue;
 522                        }
 523                        if (!strcmp(arg, "--no-flags")) {
 524                                filter &= ~DO_FLAGS;
 525                                continue;
 526                        }
 527                        if (!strcmp(arg, "--verify")) {
 528                                filter &= ~(DO_FLAGS|DO_NOREV);
 529                                verify = 1;
 530                                continue;
 531                        }
 532                        if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
 533                                quiet = 1;
 534                                continue;
 535                        }
 536                        if (!strcmp(arg, "--short") ||
 537                            !prefixcmp(arg, "--short=")) {
 538                                filter &= ~(DO_FLAGS|DO_NOREV);
 539                                verify = 1;
 540                                abbrev = DEFAULT_ABBREV;
 541                                if (arg[7] == '=')
 542                                        abbrev = strtoul(arg + 8, NULL, 10);
 543                                if (abbrev < MINIMUM_ABBREV)
 544                                        abbrev = MINIMUM_ABBREV;
 545                                else if (40 <= abbrev)
 546                                        abbrev = 40;
 547                                continue;
 548                        }
 549                        if (!strcmp(arg, "--sq")) {
 550                                output_sq = 1;
 551                                continue;
 552                        }
 553                        if (!strcmp(arg, "--not")) {
 554                                show_type ^= REVERSED;
 555                                continue;
 556                        }
 557                        if (!strcmp(arg, "--symbolic")) {
 558                                symbolic = SHOW_SYMBOLIC_ASIS;
 559                                continue;
 560                        }
 561                        if (!strcmp(arg, "--symbolic-full-name")) {
 562                                symbolic = SHOW_SYMBOLIC_FULL;
 563                                continue;
 564                        }
 565                        if (!prefixcmp(arg, "--abbrev-ref") &&
 566                            (!arg[12] || arg[12] == '=')) {
 567                                abbrev_ref = 1;
 568                                abbrev_ref_strict = warn_ambiguous_refs;
 569                                if (arg[12] == '=') {
 570                                        if (!strcmp(arg + 13, "strict"))
 571                                                abbrev_ref_strict = 1;
 572                                        else if (!strcmp(arg + 13, "loose"))
 573                                                abbrev_ref_strict = 0;
 574                                        else
 575                                                die("unknown mode for %s", arg);
 576                                }
 577                                continue;
 578                        }
 579                        if (!strcmp(arg, "--all")) {
 580                                for_each_ref(show_reference, NULL);
 581                                continue;
 582                        }
 583                        if (!strcmp(arg, "--bisect")) {
 584                                for_each_ref_in("refs/bisect/bad", show_reference, NULL);
 585                                for_each_ref_in("refs/bisect/good", anti_reference, NULL);
 586                                continue;
 587                        }
 588                        if (!prefixcmp(arg, "--branches=")) {
 589                                for_each_glob_ref_in(show_reference, arg + 11,
 590                                        "refs/heads/", NULL);
 591                                continue;
 592                        }
 593                        if (!strcmp(arg, "--branches")) {
 594                                for_each_branch_ref(show_reference, NULL);
 595                                continue;
 596                        }
 597                        if (!prefixcmp(arg, "--tags=")) {
 598                                for_each_glob_ref_in(show_reference, arg + 7,
 599                                        "refs/tags/", NULL);
 600                                continue;
 601                        }
 602                        if (!strcmp(arg, "--tags")) {
 603                                for_each_tag_ref(show_reference, NULL);
 604                                continue;
 605                        }
 606                        if (!prefixcmp(arg, "--glob=")) {
 607                                for_each_glob_ref(show_reference, arg + 7, NULL);
 608                                continue;
 609                        }
 610                        if (!prefixcmp(arg, "--remotes=")) {
 611                                for_each_glob_ref_in(show_reference, arg + 10,
 612                                        "refs/remotes/", NULL);
 613                                continue;
 614                        }
 615                        if (!strcmp(arg, "--remotes")) {
 616                                for_each_remote_ref(show_reference, NULL);
 617                                continue;
 618                        }
 619                        if (!strcmp(arg, "--show-toplevel")) {
 620                                const char *work_tree = get_git_work_tree();
 621                                if (work_tree)
 622                                        puts(work_tree);
 623                                continue;
 624                        }
 625                        if (!strcmp(arg, "--show-prefix")) {
 626                                if (prefix)
 627                                        puts(prefix);
 628                                continue;
 629                        }
 630                        if (!strcmp(arg, "--show-cdup")) {
 631                                const char *pfx = prefix;
 632                                if (!is_inside_work_tree()) {
 633                                        const char *work_tree =
 634                                                get_git_work_tree();
 635                                        if (work_tree)
 636                                                printf("%s\n", work_tree);
 637                                        continue;
 638                                }
 639                                while (pfx) {
 640                                        pfx = strchr(pfx, '/');
 641                                        if (pfx) {
 642                                                pfx++;
 643                                                printf("../");
 644                                        }
 645                                }
 646                                putchar('\n');
 647                                continue;
 648                        }
 649                        if (!strcmp(arg, "--git-dir")) {
 650                                const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
 651                                static char cwd[PATH_MAX];
 652                                int len;
 653                                if (gitdir) {
 654                                        puts(gitdir);
 655                                        continue;
 656                                }
 657                                if (!prefix) {
 658                                        puts(".git");
 659                                        continue;
 660                                }
 661                                if (!getcwd(cwd, PATH_MAX))
 662                                        die_errno("unable to get current working directory");
 663                                len = strlen(cwd);
 664                                printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
 665                                continue;
 666                        }
 667                        if (!strcmp(arg, "--is-inside-git-dir")) {
 668                                printf("%s\n", is_inside_git_dir() ? "true"
 669                                                : "false");
 670                                continue;
 671                        }
 672                        if (!strcmp(arg, "--is-inside-work-tree")) {
 673                                printf("%s\n", is_inside_work_tree() ? "true"
 674                                                : "false");
 675                                continue;
 676                        }
 677                        if (!strcmp(arg, "--is-bare-repository")) {
 678                                printf("%s\n", is_bare_repository() ? "true"
 679                                                : "false");
 680                                continue;
 681                        }
 682                        if (!prefixcmp(arg, "--since=")) {
 683                                show_datestring("--max-age=", arg+8);
 684                                continue;
 685                        }
 686                        if (!prefixcmp(arg, "--after=")) {
 687                                show_datestring("--max-age=", arg+8);
 688                                continue;
 689                        }
 690                        if (!prefixcmp(arg, "--before=")) {
 691                                show_datestring("--min-age=", arg+9);
 692                                continue;
 693                        }
 694                        if (!prefixcmp(arg, "--until=")) {
 695                                show_datestring("--min-age=", arg+8);
 696                                continue;
 697                        }
 698                        if (show_flag(arg) && verify)
 699                                die_no_single_rev(quiet);
 700                        continue;
 701                }
 702
 703                /* Not a flag argument */
 704                if (try_difference(arg))
 705                        continue;
 706                if (try_parent_shorthands(arg))
 707                        continue;
 708                name = arg;
 709                type = NORMAL;
 710                if (*arg == '^') {
 711                        name++;
 712                        type = REVERSED;
 713                }
 714                if (!get_sha1(name, sha1)) {
 715                        if (verify)
 716                                revs_count++;
 717                        else
 718                                show_rev(type, sha1, name);
 719                        continue;
 720                }
 721                if (verify)
 722                        die_no_single_rev(quiet);
 723                as_is = 1;
 724                if (!show_file(arg))
 725                        continue;
 726                verify_filename(prefix, arg);
 727        }
 728        if (verify) {
 729                if (revs_count == 1) {
 730                        show_rev(type, sha1, name);
 731                        return 0;
 732                } else if (revs_count == 0 && show_default())
 733                        return 0;
 734                die_no_single_rev(quiet);
 735        } else
 736                show_default();
 737        return 0;
 738}