git.oblomov.eu Git - git/blob - builtin/rev-parse.c

   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
  17 static int filter = ~0;
  18
  19 static const char *def;
  20
  21 #define NORMAL 0
  22 #define REVERSED 1
  23 static int show_type = NORMAL;
  24
  25 #define SHOW_SYMBOLIC_ASIS 1
  26 #define SHOW_SYMBOLIC_FULL 2
  27 static int symbolic;
  28 static int abbrev;
  29 static int abbrev_ref;
  30 static int abbrev_ref_strict;
  31 static 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  */
  38 static 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                 "--ignore-missing",
  48                 "--max-age=",
  49                 "--max-count=",
  50                 "--min-age=",
  51                 "--no-merges",
  52                 "--min-parents=",
  53                 "--no-min-parents",
  54                 "--max-parents=",
  55                 "--no-max-parents",
  56                 "--objects",
  57                 "--objects-edge",
  58                 "--parents",
  59                 "--pretty",
  60                 "--remotes=",
  61                 "--remotes",
  62                 "--glob=",
  63                 "--sparse",
  64                 "--tags=",
  65                 "--tags",
  66                 "--topo-order",
  67                 "--date-order",
  68                 "--unpacked",
  69                 NULL
  70         };
  71         const char **p = rev_args;
  72
  73         /* accept -<digit>, like traditional "head" */
  74         if ((*arg == '-') && isdigit(arg[1]))
  75                 return 1;
  76
  77         for (;;) {
  78                 const char *str = *p++;
  79                 int len;
  80                 if (!str)
  81                         return 0;
  82                 len = strlen(str);
  83                 if (!strcmp(arg, str) ||
  84                     (str[len-1] == '=' && !strncmp(arg, str, len)))
  85                         return 1;
  86         }
  87 }
  88
  89 /* Output argument as a string, either SQ or normal */
  90 static void show(const char *arg)
  91 {
  92         if (output_sq) {
  93                 int sq = '\'', ch;
  94
  95                 putchar(sq);
  96                 while ((ch = *arg++)) {
  97                         if (ch == sq)
  98                                 fputs("'\\'", stdout);
  99                         putchar(ch);
 100                 }
 101                 putchar(sq);
 102                 putchar(' ');
 103         }
 104         else
 105                 puts(arg);
 106 }
 107
 108 /* Like show(), but with a negation prefix according to type */
 109 static void show_with_type(int type, const char *arg)
 110 {
 111         if (type != show_type)
 112                 putchar('^');
 113         show(arg);
 114 }
 115
 116 /* Output a revision, only if filter allows it */
 117 static void show_rev(int type, const unsigned char *sha1, const char *name)
 118 {
 119         if (!(filter & DO_REVS))
 120                 return;
 121         def = NULL;
 122
 123         if ((symbolic || abbrev_ref) && name) {
 124                 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
 125                         unsigned char discard[20];
 126                         char *full;
 127
 128                         switch (dwim_ref(name, strlen(name), discard, &full)) {
 129                         case 0:
 130                                 /*
 131                                  * Not found -- not a ref.  We could
 132                                  * emit "name" here, but symbolic-full
 133                                  * users are interested in finding the
 134                                  * refs spelled in full, and they would
 135                                  * need to filter non-refs if we did so.
 136                                  */
 137                                 break;
 138                         case 1: /* happy */
 139                                 if (abbrev_ref)
 140                                         full = shorten_unambiguous_ref(full,
 141                                                 abbrev_ref_strict);
 142                                 show_with_type(type, full);
 143                                 break;
 144                         default: /* ambiguous */
 145                                 error("refname '%s' is ambiguous", name);
 146                                 break;
 147                         }
 148                 } else {
 149                         show_with_type(type, name);
 150                 }
 151         }
 152         else if (abbrev)
 153                 show_with_type(type, find_unique_abbrev(sha1, abbrev));
 154         else
 155                 show_with_type(type, sha1_to_hex(sha1));
 156 }
 157
 158 /* Output a flag, only if filter allows it. */
 159 static int show_flag(const char *arg)
 160 {
 161         if (!(filter & DO_FLAGS))
 162                 return 0;
 163         if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
 164                 show(arg);
 165                 return 1;
 166         }
 167         return 0;
 168 }
 169
 170 static int show_default(void)
 171 {
 172         const char *s = def;
 173
 174         if (s) {
 175                 unsigned char sha1[20];
 176
 177                 def = NULL;
 178                 if (!get_sha1(s, sha1)) {
 179                         show_rev(NORMAL, sha1, s);
 180                         return 1;
 181                 }
 182         }
 183         return 0;
 184 }
 185
 186 static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 187 {
 188         show_rev(NORMAL, sha1, refname);
 189         return 0;
 190 }
 191
 192 static int anti_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 193 {
 194         show_rev(REVERSED, sha1, refname);
 195         return 0;
 196 }
 197
 198 static void show_datestring(const char *flag, const char *datestr)
 199 {
 200         static char buffer[100];
 201
 202         /* date handling requires both flags and revs */
 203         if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
 204                 return;
 205         snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
 206         show(buffer);
 207 }
 208
 209 static int show_file(const char *arg)
 210 {
 211         show_default();
 212         if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
 213                 show(arg);
 214                 return 1;
 215         }
 216         return 0;
 217 }
 218
 219 static int try_difference(const char *arg)
 220 {
 221         char *dotdot;
 222         unsigned char sha1[20];
 223         unsigned char end[20];
 224         const char *next;
 225         const char *this;
 226         int symmetric;
 227         static const char head_by_default[] = "HEAD";
 228
 229         if (!(dotdot = strstr(arg, "..")))
 230                 return 0;
 231         next = dotdot + 2;
 232         this = arg;
 233         symmetric = (*next == '.');
 234
 235         *dotdot = 0;
 236         next += symmetric;
 237
 238         if (!*next)
 239                 next = head_by_default;
 240         if (dotdot == arg)
 241                 this = head_by_default;
 242
 243         if (this == head_by_default && next == head_by_default &&
 244             !symmetric) {
 245                 /*
 246                  * Just ".."?  That is not a range but the
 247                  * pathspec for the parent directory.
 248                  */
 249                 *dotdot = '.';
 250                 return 0;
 251         }
 252
 253         if (!get_sha1(this, sha1) && !get_sha1(next, end)) {
 254                 show_rev(NORMAL, end, next);
 255                 show_rev(symmetric ? NORMAL : REVERSED, sha1, this);
 256                 if (symmetric) {
 257                         struct commit_list *exclude;
 258                         struct commit *a, *b;
 259                         a = lookup_commit_reference(sha1);
 260                         b = lookup_commit_reference(end);
 261                         exclude = get_merge_bases(a, b, 1);
 262                         while (exclude) {
 263                                 struct commit_list *n = exclude->next;
 264                                 show_rev(REVERSED,
 265                                          exclude->item->object.sha1,NULL);
 266                                 free(exclude);
 267                                 exclude = n;
 268                         }
 269                 }
 270                 return 1;
 271         }
 272         *dotdot = '.';
 273         return 0;
 274 }
 275
 276 static int try_parent_shorthands(const char *arg)
 277 {
 278         char *dotdot;
 279         unsigned char sha1[20];
 280         struct commit *commit;
 281         struct commit_list *parents;
 282         int parents_only;
 283
 284         if ((dotdot = strstr(arg, "^!")))
 285                 parents_only = 0;
 286         else if ((dotdot = strstr(arg, "^@")))
 287                 parents_only = 1;
 288
 289         if (!dotdot || dotdot[2])
 290                 return 0;
 291
 292         *dotdot = 0;
 293         if (get_sha1(arg, sha1))
 294                 return 0;
 295
 296         if (!parents_only)
 297                 show_rev(NORMAL, sha1, arg);
 298         commit = lookup_commit_reference(sha1);
 299         for (parents = commit->parents; parents; parents = parents->next)
 300                 show_rev(parents_only ? NORMAL : REVERSED,
 301                                 parents->item->object.sha1, arg);
 302
 303         return 1;
 304 }
 305
 306 static int parseopt_dump(const struct option *o, const char *arg, int unset)
 307 {
 308         struct strbuf *parsed = o->value;
 309         if (unset)
 310                 strbuf_addf(parsed, " --no-%s", o->long_name);
 311         else if (o->short_name)
 312                 strbuf_addf(parsed, " -%c", o->short_name);
 313         else
 314                 strbuf_addf(parsed, " --%s", o->long_name);
 315         if (arg) {
 316                 strbuf_addch(parsed, ' ');
 317                 sq_quote_buf(parsed, arg);
 318         }
 319         return 0;
 320 }
 321
 322 static const char *skipspaces(const char *s)
 323 {
 324         while (isspace(*s))
 325                 s++;
 326         return s;
 327 }
 328
 329 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 330 {
 331         static int keep_dashdash = 0, stop_at_non_option = 0;
 332         static char const * const parseopt_usage[] = {
 333                 "git rev-parse --parseopt [options] -- [<args>...]",
 334                 NULL
 335         };
 336         static struct option parseopt_opts[] = {
 337                 OPT_BOOLEAN(0, "keep-dashdash", &keep_dashdash,
 338                                         "keep the `--` passed as an arg"),
 339                 OPT_BOOLEAN(0, "stop-at-non-option", &stop_at_non_option,
 340                                         "stop parsing after the "
 341                                         "first non-option argument"),
 342                 OPT_END(),
 343         };
 344
 345         struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
 346         const char **usage = NULL;
 347         struct option *opts = NULL;
 348         int onb = 0, osz = 0, unb = 0, usz = 0;
 349
 350         strbuf_addstr(&parsed, "set --");
 351         argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
 352                              PARSE_OPT_KEEP_DASHDASH);
 353         if (argc < 1 || strcmp(argv[0], "--"))
 354                 usage_with_options(parseopt_usage, parseopt_opts);
 355
 356         /* get the usage up to the first line with a -- on it */
 357         for (;;) {
 358                 if (strbuf_getline(&sb, stdin, '\n') == EOF)
 359                         die("premature end of input");
 360                 ALLOC_GROW(usage, unb + 1, usz);
 361                 if (!strcmp("--", sb.buf)) {
 362                         if (unb < 1)
 363                                 die("no usage string given before the `--' separator");
 364                         usage[unb] = NULL;
 365                         break;
 366                 }
 367                 usage[unb++] = strbuf_detach(&sb, NULL);
 368         }
 369
 370         /* parse: (<short>|<short>,<long>|<long>)[=?]? SP+ <help> */
 371         while (strbuf_getline(&sb, stdin, '\n') != EOF) {
 372                 const char *s;
 373                 struct option *o;
 374
 375                 if (!sb.len)
 376                         continue;
 377
 378                 ALLOC_GROW(opts, onb + 1, osz);
 379                 memset(opts + onb, 0, sizeof(opts[onb]));
 380
 381                 o = &opts[onb++];
 382                 s = strchr(sb.buf, ' ');
 383                 if (!s || *sb.buf == ' ') {
 384                         o->type = OPTION_GROUP;
 385                         o->help = xstrdup(skipspaces(sb.buf));
 386                         continue;
 387                 }
 388
 389                 o->type = OPTION_CALLBACK;
 390                 o->help = xstrdup(skipspaces(s));
 391                 o->value = &parsed;
 392                 o->flags = PARSE_OPT_NOARG;
 393                 o->callback = &parseopt_dump;
 394                 while (s > sb.buf && strchr("*=?!", s[-1])) {
 395                         switch (*--s) {
 396                         case '=':
 397                                 o->flags &= ~PARSE_OPT_NOARG;
 398                                 break;
 399                         case '?':
 400                                 o->flags &= ~PARSE_OPT_NOARG;
 401                                 o->flags |= PARSE_OPT_OPTARG;
 402                                 break;
 403                         case '!':
 404                                 o->flags |= PARSE_OPT_NONEG;
 405                                 break;
 406                         case '*':
 407                                 o->flags |= PARSE_OPT_HIDDEN;
 408                                 break;
 409                         }
 410                 }
 411
 412                 if (s - sb.buf == 1) /* short option only */
 413                         o->short_name = *sb.buf;
 414                 else if (sb.buf[1] != ',') /* long option only */
 415                         o->long_name = xmemdupz(sb.buf, s - sb.buf);
 416                 else {
 417                         o->short_name = *sb.buf;
 418                         o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
 419                 }
 420         }
 421         strbuf_release(&sb);
 422
 423         /* put an OPT_END() */
 424         ALLOC_GROW(opts, onb + 1, osz);
 425         memset(opts + onb, 0, sizeof(opts[onb]));
 426         argc = parse_options(argc, argv, prefix, opts, usage,
 427                         (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
 428                         (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
 429                         PARSE_OPT_SHELL_EVAL);
 430
 431         strbuf_addf(&parsed, " --");
 432         sq_quote_argv(&parsed, argv, 0);
 433         puts(parsed.buf);
 434         return 0;
 435 }
 436
 437 static int cmd_sq_quote(int argc, const char **argv)
 438 {
 439         struct strbuf buf = STRBUF_INIT;
 440
 441         if (argc)
 442                 sq_quote_argv(&buf, argv, 0);
 443         printf("%s\n", buf.buf);
 444         strbuf_release(&buf);
 445
 446         return 0;
 447 }
 448
 449 static void die_no_single_rev(int quiet)
 450 {
 451         if (quiet)
 452                 exit(1);
 453         else
 454                 die("Needed a single revision");
 455 }
 456
 457 static const char builtin_rev_parse_usage[] =
 458 "git rev-parse --parseopt [options] -- [<args>...]\n"
 459 "   or: git rev-parse --sq-quote [<arg>...]\n"
 460 "   or: git rev-parse [options] [<arg>...]\n"
 461 "\n"
 462 "Run \"git rev-parse --parseopt -h\" for more information on the first usage.";
 463
 464 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 465 {
 466         int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
 467         unsigned char sha1[20];
 468         const char *name = NULL;
 469
 470         if (argc > 1 && !strcmp("--parseopt", argv[1]))
 471                 return cmd_parseopt(argc - 1, argv + 1, prefix);
 472
 473         if (argc > 1 && !strcmp("--sq-quote", argv[1]))
 474                 return cmd_sq_quote(argc - 2, argv + 2);
 475
 476         if (argc == 2 && !strcmp("--local-env-vars", argv[1])) {
 477                 int i;
 478                 for (i = 0; local_repo_env[i]; i++)
 479                         printf("%s\n", local_repo_env[i]);
 480                 return 0;
 481         }
 482
 483         if (argc > 2 && !strcmp(argv[1], "--resolve-git-dir")) {
 484                 const char *gitdir = resolve_gitdir(argv[2]);
 485                 if (!gitdir)
 486                         die("not a gitdir '%s'", argv[2]);
 487                 puts(gitdir);
 488                 return 0;
 489         }
 490
 491         if (argc > 1 && !strcmp("-h", argv[1]))
 492                 usage(builtin_rev_parse_usage);
 493
 494         prefix = setup_git_directory();
 495         git_config(git_default_config, NULL);
 496         for (i = 1; i < argc; i++) {
 497                 const char *arg = argv[i];
 498
 499                 if (as_is) {
 500                         if (show_file(arg) && as_is < 2)
 501                                 verify_filename(prefix, arg, 0);
 502                         continue;
 503                 }
 504                 if (!strcmp(arg,"-n")) {
 505                         if (++i >= argc)
 506                                 die("-n requires an argument");
 507                         if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
 508                                 show(arg);
 509                                 show(argv[i]);
 510                         }
 511                         continue;
 512                 }
 513                 if (!prefixcmp(arg, "-n")) {
 514                         if ((filter & DO_FLAGS) && (filter & DO_REVS))
 515                                 show(arg);
 516                         continue;
 517                 }
 518
 519                 if (*arg == '-') {
 520                         if (!strcmp(arg, "--")) {
 521                                 as_is = 2;
 522                                 /* Pass on the "--" if we show anything but files.. */
 523                                 if (filter & (DO_FLAGS | DO_REVS))
 524                                         show_file(arg);
 525                                 continue;
 526                         }
 527                         if (!strcmp(arg, "--default")) {
 528                                 def = argv[i+1];
 529                                 i++;
 530                                 continue;
 531                         }
 532                         if (!strcmp(arg, "--revs-only")) {
 533                                 filter &= ~DO_NOREV;
 534                                 continue;
 535                         }
 536                         if (!strcmp(arg, "--no-revs")) {
 537                                 filter &= ~DO_REVS;
 538                                 continue;
 539                         }
 540                         if (!strcmp(arg, "--flags")) {
 541                                 filter &= ~DO_NONFLAGS;
 542                                 continue;
 543                         }
 544                         if (!strcmp(arg, "--no-flags")) {
 545                                 filter &= ~DO_FLAGS;
 546                                 continue;
 547                         }
 548                         if (!strcmp(arg, "--verify")) {
 549                                 filter &= ~(DO_FLAGS|DO_NOREV);
 550                                 verify = 1;
 551                                 continue;
 552                         }
 553                         if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
 554                                 quiet = 1;
 555                                 continue;
 556                         }
 557                         if (!strcmp(arg, "--short") ||
 558                             !prefixcmp(arg, "--short=")) {
 559                                 filter &= ~(DO_FLAGS|DO_NOREV);
 560                                 verify = 1;
 561                                 abbrev = DEFAULT_ABBREV;
 562                                 if (arg[7] == '=')
 563                                         abbrev = strtoul(arg + 8, NULL, 10);
 564                                 if (abbrev < MINIMUM_ABBREV)
 565                                         abbrev = MINIMUM_ABBREV;
 566                                 else if (40 <= abbrev)
 567                                         abbrev = 40;
 568                                 continue;
 569                         }
 570                         if (!strcmp(arg, "--sq")) {
 571                                 output_sq = 1;
 572                                 continue;
 573                         }
 574                         if (!strcmp(arg, "--not")) {
 575                                 show_type ^= REVERSED;
 576                                 continue;
 577                         }
 578                         if (!strcmp(arg, "--symbolic")) {
 579                                 symbolic = SHOW_SYMBOLIC_ASIS;
 580                                 continue;
 581                         }
 582                         if (!strcmp(arg, "--symbolic-full-name")) {
 583                                 symbolic = SHOW_SYMBOLIC_FULL;
 584                                 continue;
 585                         }
 586                         if (!prefixcmp(arg, "--abbrev-ref") &&
 587                             (!arg[12] || arg[12] == '=')) {
 588                                 abbrev_ref = 1;
 589                                 abbrev_ref_strict = warn_ambiguous_refs;
 590                                 if (arg[12] == '=') {
 591                                         if (!strcmp(arg + 13, "strict"))
 592                                                 abbrev_ref_strict = 1;
 593                                         else if (!strcmp(arg + 13, "loose"))
 594                                                 abbrev_ref_strict = 0;
 595                                         else
 596                                                 die("unknown mode for %s", arg);
 597                                 }
 598                                 continue;
 599                         }
 600                         if (!strcmp(arg, "--all")) {
 601                                 for_each_ref(show_reference, NULL);
 602                                 continue;
 603                         }
 604                         if (!strcmp(arg, "--bisect")) {
 605                                 for_each_ref_in("refs/bisect/bad", show_reference, NULL);
 606                                 for_each_ref_in("refs/bisect/good", anti_reference, NULL);
 607                                 continue;
 608                         }
 609                         if (!prefixcmp(arg, "--branches=")) {
 610                                 for_each_glob_ref_in(show_reference, arg + 11,
 611                                         "refs/heads/", NULL);
 612                                 continue;
 613                         }
 614                         if (!strcmp(arg, "--branches")) {
 615                                 for_each_branch_ref(show_reference, NULL);
 616                                 continue;
 617                         }
 618                         if (!prefixcmp(arg, "--tags=")) {
 619                                 for_each_glob_ref_in(show_reference, arg + 7,
 620                                         "refs/tags/", NULL);
 621                                 continue;
 622                         }
 623                         if (!strcmp(arg, "--tags")) {
 624                                 for_each_tag_ref(show_reference, NULL);
 625                                 continue;
 626                         }
 627                         if (!prefixcmp(arg, "--glob=")) {
 628                                 for_each_glob_ref(show_reference, arg + 7, NULL);
 629                                 continue;
 630                         }
 631                         if (!prefixcmp(arg, "--remotes=")) {
 632                                 for_each_glob_ref_in(show_reference, arg + 10,
 633                                         "refs/remotes/", NULL);
 634                                 continue;
 635                         }
 636                         if (!strcmp(arg, "--remotes")) {
 637                                 for_each_remote_ref(show_reference, NULL);
 638                                 continue;
 639                         }
 640                         if (!strcmp(arg, "--show-toplevel")) {
 641                                 const char *work_tree = get_git_work_tree();
 642                                 if (work_tree)
 643                                         puts(work_tree);
 644                                 continue;
 645                         }
 646                         if (!strcmp(arg, "--show-prefix")) {
 647                                 if (prefix)
 648                                         puts(prefix);
 649                                 else
 650                                         putchar('\n');
 651                                 continue;
 652                         }
 653                         if (!strcmp(arg, "--show-cdup")) {
 654                                 const char *pfx = prefix;
 655                                 if (!is_inside_work_tree()) {
 656                                         const char *work_tree =
 657                                                 get_git_work_tree();
 658                                         if (work_tree)
 659                                                 printf("%s\n", work_tree);
 660                                         continue;
 661                                 }
 662                                 while (pfx) {
 663                                         pfx = strchr(pfx, '/');
 664                                         if (pfx) {
 665                                                 pfx++;
 666                                                 printf("../");
 667                                         }
 668                                 }
 669                                 putchar('\n');
 670                                 continue;
 671                         }
 672                         if (!strcmp(arg, "--git-dir")) {
 673                                 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
 674                                 static char cwd[PATH_MAX];
 675                                 int len;
 676                                 if (gitdir) {
 677                                         puts(gitdir);
 678                                         continue;
 679                                 }
 680                                 if (!prefix) {
 681                                         puts(".git");
 682                                         continue;
 683                                 }
 684                                 if (!getcwd(cwd, PATH_MAX))
 685                                         die_errno("unable to get current working directory");
 686                                 len = strlen(cwd);
 687                                 printf("%s%s.git\n", cwd, len && cwd[len-1] != '/' ? "/" : "");
 688                                 continue;
 689                         }
 690                         if (!strcmp(arg, "--is-inside-git-dir")) {
 691                                 printf("%s\n", is_inside_git_dir() ? "true"
 692                                                 : "false");
 693                                 continue;
 694                         }
 695                         if (!strcmp(arg, "--is-inside-work-tree")) {
 696                                 printf("%s\n", is_inside_work_tree() ? "true"
 697                                                 : "false");
 698                                 continue;
 699                         }
 700                         if (!strcmp(arg, "--is-bare-repository")) {
 701                                 printf("%s\n", is_bare_repository() ? "true"
 702                                                 : "false");
 703                                 continue;
 704                         }
 705                         if (!prefixcmp(arg, "--since=")) {
 706                                 show_datestring("--max-age=", arg+8);
 707                                 continue;
 708                         }
 709                         if (!prefixcmp(arg, "--after=")) {
 710                                 show_datestring("--max-age=", arg+8);
 711                                 continue;
 712                         }
 713                         if (!prefixcmp(arg, "--before=")) {
 714                                 show_datestring("--min-age=", arg+9);
 715                                 continue;
 716                         }
 717                         if (!prefixcmp(arg, "--until=")) {
 718                                 show_datestring("--min-age=", arg+8);
 719                                 continue;
 720                         }
 721                         if (show_flag(arg) && verify)
 722                                 die_no_single_rev(quiet);
 723                         continue;
 724                 }
 725
 726                 /* Not a flag argument */
 727                 if (try_difference(arg))
 728                         continue;
 729                 if (try_parent_shorthands(arg))
 730                         continue;
 731                 name = arg;
 732                 type = NORMAL;
 733                 if (*arg == '^') {
 734                         name++;
 735                         type = REVERSED;
 736                 }
 737                 if (!get_sha1(name, sha1)) {
 738                         if (verify)
 739                                 revs_count++;
 740                         else
 741                                 show_rev(type, sha1, name);
 742                         continue;
 743                 }
 744                 if (verify)
 745                         die_no_single_rev(quiet);
 746                 as_is = 1;
 747                 if (!show_file(arg))
 748                         continue;
 749                 verify_filename(prefix, arg, 1);
 750         }
 751         if (verify) {
 752                 if (revs_count == 1) {
 753                         show_rev(type, sha1, name);
 754                         return 0;
 755                 } else if (revs_count == 0 && show_default())
 756                         return 0;
 757                 die_no_single_rev(quiet);
 758         } else
 759                 show_default();
 760         return 0;
 761 }