builtin/rev-parse.c

   1 /*
   2  * rev-parse.c
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #define USE_THE_INDEX_VARIABLE
   7 #include "cache.h"
   8 #include "abspath.h"
   9 #include "alloc.h"
  10 #include "config.h"
  11 #include "commit.h"
  12 #include "environment.h"
  13 #include "gettext.h"
  14 #include "hex.h"
  15 #include "refs.h"
  16 #include "quote.h"
  17 #include "builtin.h"
  18 #include "parse-options.h"
  19 #include "diff.h"
  20 #include "revision.h"
  21 #include "setup.h"
  22 #include "split-index.h"
  23 #include "submodule.h"
  24 #include "commit-reach.h"
  25 #include "shallow.h"
  26
  27 #define DO_REVS         1
  28 #define DO_NOREV        2
  29 #define DO_FLAGS        4
  30 #define DO_NONFLAGS     8
  31 static int filter = ~0;
  32
  33 static const char *def;
  34
  35 #define NORMAL 0
  36 #define REVERSED 1
  37 static int show_type = NORMAL;
  38
  39 #define SHOW_SYMBOLIC_ASIS 1
  40 #define SHOW_SYMBOLIC_FULL 2
  41 static int symbolic;
  42 static int abbrev;
  43 static int abbrev_ref;
  44 static int abbrev_ref_strict;
  45 static int output_sq;
  46
  47 static int stuck_long;
  48 static struct ref_exclusions ref_excludes = REF_EXCLUSIONS_INIT;
  49
  50 /*
  51  * Some arguments are relevant "revision" arguments,
  52  * others are about output format or other details.
  53  * This sorts it all out.
  54  */
  55 static int is_rev_argument(const char *arg)
  56 {
  57         static const char *rev_args[] = {
  58                 "--all",
  59                 "--bisect",
  60                 "--dense",
  61                 "--branches=",
  62                 "--branches",
  63                 "--header",
  64                 "--ignore-missing",
  65                 "--max-age=",
  66                 "--max-count=",
  67                 "--min-age=",
  68                 "--no-merges",
  69                 "--min-parents=",
  70                 "--no-min-parents",
  71                 "--max-parents=",
  72                 "--no-max-parents",
  73                 "--objects",
  74                 "--objects-edge",
  75                 "--parents",
  76                 "--pretty",
  77                 "--remotes=",
  78                 "--remotes",
  79                 "--glob=",
  80                 "--sparse",
  81                 "--tags=",
  82                 "--tags",
  83                 "--topo-order",
  84                 "--date-order",
  85                 "--unpacked",
  86                 NULL
  87         };
  88         const char **p = rev_args;
  89
  90         /* accept -<digit>, like traditional "head" */
  91         if ((*arg == '-') && isdigit(arg[1]))
  92                 return 1;
  93
  94         for (;;) {
  95                 const char *str = *p++;
  96                 int len;
  97                 if (!str)
  98                         return 0;
  99                 len = strlen(str);
 100                 if (!strcmp(arg, str) ||
 101                     (str[len-1] == '=' && !strncmp(arg, str, len)))
 102                         return 1;
 103         }
 104 }
 105
 106 /* Output argument as a string, either SQ or normal */
 107 static void show(const char *arg)
 108 {
 109         if (output_sq) {
 110                 int sq = '\'', ch;
 111
 112                 putchar(sq);
 113                 while ((ch = *arg++)) {
 114                         if (ch == sq)
 115                                 fputs("'\\'", stdout);
 116                         putchar(ch);
 117                 }
 118                 putchar(sq);
 119                 putchar(' ');
 120         }
 121         else
 122                 puts(arg);
 123 }
 124
 125 /* Like show(), but with a negation prefix according to type */
 126 static void show_with_type(int type, const char *arg)
 127 {
 128         if (type != show_type)
 129                 putchar('^');
 130         show(arg);
 131 }
 132
 133 /* Output a revision, only if filter allows it */
 134 static void show_rev(int type, const struct object_id *oid, const char *name)
 135 {
 136         if (!(filter & DO_REVS))
 137                 return;
 138         def = NULL;
 139
 140         if ((symbolic || abbrev_ref) && name) {
 141                 if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
 142                         struct object_id discard;
 143                         char *full;
 144
 145                         switch (dwim_ref(name, strlen(name), &discard, &full, 0)) {
 146                         case 0:
 147                                 /*
 148                                  * Not found -- not a ref.  We could
 149                                  * emit "name" here, but symbolic-full
 150                                  * users are interested in finding the
 151                                  * refs spelled in full, and they would
 152                                  * need to filter non-refs if we did so.
 153                                  */
 154                                 break;
 155                         case 1: /* happy */
 156                                 if (abbrev_ref)
 157                                         full = shorten_unambiguous_ref(full,
 158                                                 abbrev_ref_strict);
 159                                 show_with_type(type, full);
 160                                 break;
 161                         default: /* ambiguous */
 162                                 error("refname '%s' is ambiguous", name);
 163                                 break;
 164                         }
 165                         free(full);
 166                 } else {
 167                         show_with_type(type, name);
 168                 }
 169         }
 170         else if (abbrev)
 171                 show_with_type(type, find_unique_abbrev(oid, abbrev));
 172         else
 173                 show_with_type(type, oid_to_hex(oid));
 174 }
 175
 176 /* Output a flag, only if filter allows it. */
 177 static int show_flag(const char *arg)
 178 {
 179         if (!(filter & DO_FLAGS))
 180                 return 0;
 181         if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
 182                 show(arg);
 183                 return 1;
 184         }
 185         return 0;
 186 }
 187
 188 static int show_default(void)
 189 {
 190         const char *s = def;
 191
 192         if (s) {
 193                 struct object_id oid;
 194
 195                 def = NULL;
 196                 if (!get_oid(s, &oid)) {
 197                         show_rev(NORMAL, &oid, s);
 198                         return 1;
 199                 }
 200         }
 201         return 0;
 202 }
 203
 204 static int show_reference(const char *refname, const struct object_id *oid,
 205                           int flag UNUSED, void *cb_data UNUSED)
 206 {
 207         if (ref_excluded(&ref_excludes, refname))
 208                 return 0;
 209         show_rev(NORMAL, oid, refname);
 210         return 0;
 211 }
 212
 213 static int anti_reference(const char *refname, const struct object_id *oid,
 214                           int flag UNUSED, void *cb_data UNUSED)
 215 {
 216         show_rev(REVERSED, oid, refname);
 217         return 0;
 218 }
 219
 220 static int show_abbrev(const struct object_id *oid, void *cb_data)
 221 {
 222         show_rev(NORMAL, oid, NULL);
 223         return 0;
 224 }
 225
 226 static void show_datestring(const char *flag, const char *datestr)
 227 {
 228         char *buffer;
 229
 230         /* date handling requires both flags and revs */
 231         if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
 232                 return;
 233         buffer = xstrfmt("%s%"PRItime, flag, approxidate(datestr));
 234         show(buffer);
 235         free(buffer);
 236 }
 237
 238 static int show_file(const char *arg, int output_prefix)
 239 {
 240         show_default();
 241         if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
 242                 if (output_prefix) {
 243                         const char *prefix = startup_info->prefix;
 244                         char *fname = prefix_filename(prefix, arg);
 245                         show(fname);
 246                         free(fname);
 247                 } else
 248                         show(arg);
 249                 return 1;
 250         }
 251         return 0;
 252 }
 253
 254 static int try_difference(const char *arg)
 255 {
 256         char *dotdot;
 257         struct object_id start_oid;
 258         struct object_id end_oid;
 259         const char *end;
 260         const char *start;
 261         int symmetric;
 262         static const char head_by_default[] = "HEAD";
 263
 264         if (!(dotdot = strstr(arg, "..")))
 265                 return 0;
 266         end = dotdot + 2;
 267         start = arg;
 268         symmetric = (*end == '.');
 269
 270         *dotdot = 0;
 271         end += symmetric;
 272
 273         if (!*end)
 274                 end = head_by_default;
 275         if (dotdot == arg)
 276                 start = head_by_default;
 277
 278         if (start == head_by_default && end == head_by_default &&
 279             !symmetric) {
 280                 /*
 281                  * Just ".."?  That is not a range but the
 282                  * pathspec for the parent directory.
 283                  */
 284                 *dotdot = '.';
 285                 return 0;
 286         }
 287
 288         if (!get_oid_committish(start, &start_oid) && !get_oid_committish(end, &end_oid)) {
 289                 show_rev(NORMAL, &end_oid, end);
 290                 show_rev(symmetric ? NORMAL : REVERSED, &start_oid, start);
 291                 if (symmetric) {
 292                         struct commit_list *exclude;
 293                         struct commit *a, *b;
 294                         a = lookup_commit_reference(the_repository, &start_oid);
 295                         b = lookup_commit_reference(the_repository, &end_oid);
 296                         if (!a || !b) {
 297                                 *dotdot = '.';
 298                                 return 0;
 299                         }
 300                         exclude = get_merge_bases(a, b);
 301                         while (exclude) {
 302                                 struct commit *commit = pop_commit(&exclude);
 303                                 show_rev(REVERSED, &commit->object.oid, NULL);
 304                         }
 305                 }
 306                 *dotdot = '.';
 307                 return 1;
 308         }
 309         *dotdot = '.';
 310         return 0;
 311 }
 312
 313 static int try_parent_shorthands(const char *arg)
 314 {
 315         char *dotdot;
 316         struct object_id oid;
 317         struct commit *commit;
 318         struct commit_list *parents;
 319         int parent_number;
 320         int include_rev = 0;
 321         int include_parents = 0;
 322         int exclude_parent = 0;
 323
 324         if ((dotdot = strstr(arg, "^!"))) {
 325                 include_rev = 1;
 326                 if (dotdot[2])
 327                         return 0;
 328         } else if ((dotdot = strstr(arg, "^@"))) {
 329                 include_parents = 1;
 330                 if (dotdot[2])
 331                         return 0;
 332         } else if ((dotdot = strstr(arg, "^-"))) {
 333                 include_rev = 1;
 334                 exclude_parent = 1;
 335
 336                 if (dotdot[2]) {
 337                         char *end;
 338                         exclude_parent = strtoul(dotdot + 2, &end, 10);
 339                         if (*end != '\0' || !exclude_parent)
 340                                 return 0;
 341                 }
 342         } else
 343                 return 0;
 344
 345         *dotdot = 0;
 346         if (get_oid_committish(arg, &oid) ||
 347             !(commit = lookup_commit_reference(the_repository, &oid))) {
 348                 *dotdot = '^';
 349                 return 0;
 350         }
 351
 352         if (exclude_parent &&
 353             exclude_parent > commit_list_count(commit->parents)) {
 354                 *dotdot = '^';
 355                 return 0;
 356         }
 357
 358         if (include_rev)
 359                 show_rev(NORMAL, &oid, arg);
 360         for (parents = commit->parents, parent_number = 1;
 361              parents;
 362              parents = parents->next, parent_number++) {
 363                 char *name = NULL;
 364
 365                 if (exclude_parent && parent_number != exclude_parent)
 366                         continue;
 367
 368                 if (symbolic)
 369                         name = xstrfmt("%s^%d", arg, parent_number);
 370                 show_rev(include_parents ? NORMAL : REVERSED,
 371                          &parents->item->object.oid, name);
 372                 free(name);
 373         }
 374
 375         *dotdot = '^';
 376         return 1;
 377 }
 378
 379 static int parseopt_dump(const struct option *o, const char *arg, int unset)
 380 {
 381         struct strbuf *parsed = o->value;
 382         if (unset)
 383                 strbuf_addf(parsed, " --no-%s", o->long_name);
 384         else if (o->short_name && (o->long_name == NULL || !stuck_long))
 385                 strbuf_addf(parsed, " -%c", o->short_name);
 386         else
 387                 strbuf_addf(parsed, " --%s", o->long_name);
 388         if (arg) {
 389                 if (!stuck_long)
 390                         strbuf_addch(parsed, ' ');
 391                 else if (o->long_name)
 392                         strbuf_addch(parsed, '=');
 393                 sq_quote_buf(parsed, arg);
 394         }
 395         return 0;
 396 }
 397
 398 static const char *skipspaces(const char *s)
 399 {
 400         while (isspace(*s))
 401                 s++;
 402         return s;
 403 }
 404
 405 static char *findspace(const char *s)
 406 {
 407         for (; *s; s++)
 408                 if (isspace(*s))
 409                         return (char*)s;
 410         return NULL;
 411 }
 412
 413 static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 414 {
 415         static int keep_dashdash = 0, stop_at_non_option = 0;
 416         static char const * const parseopt_usage[] = {
 417                 N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
 418                 NULL
 419         };
 420         static struct option parseopt_opts[] = {
 421                 OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
 422                                         N_("keep the `--` passed as an arg")),
 423                 OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
 424                                         N_("stop parsing after the "
 425                                            "first non-option argument")),
 426                 OPT_BOOL(0, "stuck-long", &stuck_long,
 427                                         N_("output in stuck long form")),
 428                 OPT_END(),
 429         };
 430         static const char * const flag_chars = "*=?!";
 431
 432         struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
 433         const char **usage = NULL;
 434         struct option *opts = NULL;
 435         int onb = 0, osz = 0, unb = 0, usz = 0;
 436
 437         strbuf_addstr(&parsed, "set --");
 438         argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
 439                              PARSE_OPT_KEEP_DASHDASH);
 440         if (argc < 1 || strcmp(argv[0], "--"))
 441                 usage_with_options(parseopt_usage, parseopt_opts);
 442
 443         /* get the usage up to the first line with a -- on it */
 444         for (;;) {
 445                 if (strbuf_getline(&sb, stdin) == EOF)
 446                         die(_("premature end of input"));
 447                 ALLOC_GROW(usage, unb + 1, usz);
 448                 if (!strcmp("--", sb.buf)) {
 449                         if (unb < 1)
 450                                 die(_("no usage string given before the `--' separator"));
 451                         usage[unb] = NULL;
 452                         break;
 453                 }
 454                 usage[unb++] = strbuf_detach(&sb, NULL);
 455         }
 456
 457         /* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
 458         while (strbuf_getline(&sb, stdin) != EOF) {
 459                 const char *s;
 460                 char *help;
 461                 struct option *o;
 462
 463                 if (!sb.len)
 464                         continue;
 465
 466                 ALLOC_GROW(opts, onb + 1, osz);
 467                 memset(opts + onb, 0, sizeof(opts[onb]));
 468
 469                 o = &opts[onb++];
 470                 help = findspace(sb.buf);
 471                 if (!help || sb.buf == help) {
 472                         o->type = OPTION_GROUP;
 473                         o->help = xstrdup(skipspaces(sb.buf));
 474                         continue;
 475                 }
 476
 477                 *help = '\0';
 478
 479                 o->type = OPTION_CALLBACK;
 480                 o->help = xstrdup(skipspaces(help+1));
 481                 o->value = &parsed;
 482                 o->flags = PARSE_OPT_NOARG;
 483                 o->callback = &parseopt_dump;
 484
 485                 /* name(s) */
 486                 s = strpbrk(sb.buf, flag_chars);
 487                 if (!s)
 488                         s = help;
 489
 490                 if (s == sb.buf)
 491                         die(_("missing opt-spec before option flags"));
 492
 493                 if (s - sb.buf == 1) /* short option only */
 494                         o->short_name = *sb.buf;
 495                 else if (sb.buf[1] != ',') /* long option only */
 496                         o->long_name = xmemdupz(sb.buf, s - sb.buf);
 497                 else {
 498                         o->short_name = *sb.buf;
 499                         o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
 500                 }
 501
 502                 /* flags */
 503                 while (s < help) {
 504                         switch (*s++) {
 505                         case '=':
 506                                 o->flags &= ~PARSE_OPT_NOARG;
 507                                 continue;
 508                         case '?':
 509                                 o->flags &= ~PARSE_OPT_NOARG;
 510                                 o->flags |= PARSE_OPT_OPTARG;
 511                                 continue;
 512                         case '!':
 513                                 o->flags |= PARSE_OPT_NONEG;
 514                                 continue;
 515                         case '*':
 516                                 o->flags |= PARSE_OPT_HIDDEN;
 517                                 continue;
 518                         }
 519                         s--;
 520                         break;
 521                 }
 522
 523                 if (s < help)
 524                         o->argh = xmemdupz(s, help - s);
 525         }
 526         strbuf_release(&sb);
 527
 528         /* put an OPT_END() */
 529         ALLOC_GROW(opts, onb + 1, osz);
 530         memset(opts + onb, 0, sizeof(opts[onb]));
 531         argc = parse_options(argc, argv, prefix, opts, usage,
 532                         (keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
 533                         (stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
 534                         PARSE_OPT_SHELL_EVAL);
 535
 536         strbuf_addstr(&parsed, " --");
 537         sq_quote_argv(&parsed, argv);
 538         puts(parsed.buf);
 539         strbuf_release(&parsed);
 540         return 0;
 541 }
 542
 543 static int cmd_sq_quote(int argc, const char **argv)
 544 {
 545         struct strbuf buf = STRBUF_INIT;
 546
 547         if (argc)
 548                 sq_quote_argv(&buf, argv);
 549         printf("%s\n", buf.buf);
 550         strbuf_release(&buf);
 551
 552         return 0;
 553 }
 554
 555 static void die_no_single_rev(int quiet)
 556 {
 557         if (quiet)
 558                 exit(1);
 559         else
 560                 die(_("Needed a single revision"));
 561 }
 562
 563 static const char builtin_rev_parse_usage[] =
 564 N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
 565    "   or: git rev-parse --sq-quote [<arg>...]\n"
 566    "   or: git rev-parse [<options>] [<arg>...]\n"
 567    "\n"
 568    "Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
 569
 570 /*
 571  * Parse "opt" or "opt=<value>", setting value respectively to either
 572  * NULL or the string after "=".
 573  */
 574 static int opt_with_value(const char *arg, const char *opt, const char **value)
 575 {
 576         if (skip_prefix(arg, opt, &arg)) {
 577                 if (!*arg) {
 578                         *value = NULL;
 579                         return 1;
 580                 }
 581                 if (*arg++ == '=') {
 582                         *value = arg;
 583                         return 1;
 584                 }
 585         }
 586         return 0;
 587 }
 588
 589 static void handle_ref_opt(const char *pattern, const char *prefix)
 590 {
 591         if (pattern)
 592                 for_each_glob_ref_in(show_reference, pattern, prefix, NULL);
 593         else
 594                 for_each_ref_in(prefix, show_reference, NULL);
 595         clear_ref_exclusions(&ref_excludes);
 596 }
 597
 598 enum format_type {
 599         /* We would like a relative path. */
 600         FORMAT_RELATIVE,
 601         /* We would like a canonical absolute path. */
 602         FORMAT_CANONICAL,
 603         /* We would like the default behavior. */
 604         FORMAT_DEFAULT,
 605 };
 606
 607 enum default_type {
 608         /* Our default is a relative path. */
 609         DEFAULT_RELATIVE,
 610         /* Our default is a relative path if there's a shared root. */
 611         DEFAULT_RELATIVE_IF_SHARED,
 612         /* Our default is a canonical absolute path. */
 613         DEFAULT_CANONICAL,
 614         /* Our default is not to modify the item. */
 615         DEFAULT_UNMODIFIED,
 616 };
 617
 618 static void print_path(const char *path, const char *prefix, enum format_type format, enum default_type def)
 619 {
 620         char *cwd = NULL;
 621         /*
 622          * We don't ever produce a relative path if prefix is NULL, so set the
 623          * prefix to the current directory so that we can produce a relative
 624          * path whenever possible.  If we're using RELATIVE_IF_SHARED mode, then
 625          * we want an absolute path unless the two share a common prefix, so don't
 626          * set it in that case, since doing so causes a relative path to always
 627          * be produced if possible.
 628          */
 629         if (!prefix && (format != FORMAT_DEFAULT || def != DEFAULT_RELATIVE_IF_SHARED))
 630                 prefix = cwd = xgetcwd();
 631         if (format == FORMAT_DEFAULT && def == DEFAULT_UNMODIFIED) {
 632                 puts(path);
 633         } else if (format == FORMAT_RELATIVE ||
 634                   (format == FORMAT_DEFAULT && def == DEFAULT_RELATIVE)) {
 635                 /*
 636                  * In order for relative_path to work as expected, we need to
 637                  * make sure that both paths are absolute paths.  If we don't,
 638                  * we can end up with an unexpected absolute path that the user
 639                  * didn't want.
 640                  */
 641                 struct strbuf buf = STRBUF_INIT, realbuf = STRBUF_INIT, prefixbuf = STRBUF_INIT;
 642                 if (!is_absolute_path(path)) {
 643                         strbuf_realpath_forgiving(&realbuf, path,  1);
 644                         path = realbuf.buf;
 645                 }
 646                 if (!is_absolute_path(prefix)) {
 647                         strbuf_realpath_forgiving(&prefixbuf, prefix, 1);
 648                         prefix = prefixbuf.buf;
 649                 }
 650                 puts(relative_path(path, prefix, &buf));
 651                 strbuf_release(&buf);
 652                 strbuf_release(&realbuf);
 653                 strbuf_release(&prefixbuf);
 654         } else if (format == FORMAT_DEFAULT && def == DEFAULT_RELATIVE_IF_SHARED) {
 655                 struct strbuf buf = STRBUF_INIT;
 656                 puts(relative_path(path, prefix, &buf));
 657                 strbuf_release(&buf);
 658         } else {
 659                 struct strbuf buf = STRBUF_INIT;
 660                 strbuf_realpath_forgiving(&buf, path, 1);
 661                 puts(buf.buf);
 662                 strbuf_release(&buf);
 663         }
 664         free(cwd);
 665 }
 666
 667 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 668 {
 669         int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
 670         int did_repo_setup = 0;
 671         int has_dashdash = 0;
 672         int output_prefix = 0;
 673         struct object_id oid;
 674         unsigned int flags = 0;
 675         const char *name = NULL;
 676         struct object_context unused;
 677         struct strbuf buf = STRBUF_INIT;
 678         const int hexsz = the_hash_algo->hexsz;
 679         int seen_end_of_options = 0;
 680         enum format_type format = FORMAT_DEFAULT;
 681
 682         if (argc > 1 && !strcmp("--parseopt", argv[1]))
 683                 return cmd_parseopt(argc - 1, argv + 1, prefix);
 684
 685         if (argc > 1 && !strcmp("--sq-quote", argv[1]))
 686                 return cmd_sq_quote(argc - 2, argv + 2);
 687
 688         if (argc > 1 && !strcmp("-h", argv[1]))
 689                 usage(builtin_rev_parse_usage);
 690
 691         for (i = 1; i < argc; i++) {
 692                 if (!strcmp(argv[i], "--")) {
 693                         has_dashdash = 1;
 694                         break;
 695                 }
 696         }
 697
 698         /* No options; just report on whether we're in a git repo or not. */
 699         if (argc == 1) {
 700                 setup_git_directory();
 701                 git_config(git_default_config, NULL);
 702                 return 0;
 703         }
 704
 705         for (i = 1; i < argc; i++) {
 706                 const char *arg = argv[i];
 707
 708                 if (as_is) {
 709                         if (show_file(arg, output_prefix) && as_is < 2)
 710                                 verify_filename(prefix, arg, 0);
 711                         continue;
 712                 }
 713
 714                 if (!seen_end_of_options) {
 715                         if (!strcmp(arg, "--local-env-vars")) {
 716                                 int i;
 717                                 for (i = 0; local_repo_env[i]; i++)
 718                                         printf("%s\n", local_repo_env[i]);
 719                                 continue;
 720                         }
 721                         if (!strcmp(arg, "--resolve-git-dir")) {
 722                                 const char *gitdir = argv[++i];
 723                                 if (!gitdir)
 724                                         die(_("--resolve-git-dir requires an argument"));
 725                                 gitdir = resolve_gitdir(gitdir);
 726                                 if (!gitdir)
 727                                         die(_("not a gitdir '%s'"), argv[i]);
 728                                 puts(gitdir);
 729                                 continue;
 730                         }
 731                 }
 732
 733                 /* The rest of the options require a git repository. */
 734                 if (!did_repo_setup) {
 735                         prefix = setup_git_directory();
 736                         git_config(git_default_config, NULL);
 737                         did_repo_setup = 1;
 738
 739                         prepare_repo_settings(the_repository);
 740                         the_repository->settings.command_requires_full_index = 0;
 741                 }
 742
 743                 if (!strcmp(arg, "--")) {
 744                         as_is = 2;
 745                         /* Pass on the "--" if we show anything but files.. */
 746                         if (filter & (DO_FLAGS | DO_REVS))
 747                                 show_file(arg, 0);
 748                         continue;
 749                 }
 750
 751                 if (!seen_end_of_options && *arg == '-') {
 752                         if (!strcmp(arg, "--git-path")) {
 753                                 if (!argv[i + 1])
 754                                         die(_("--git-path requires an argument"));
 755                                 strbuf_reset(&buf);
 756                                 print_path(git_path("%s", argv[i + 1]), prefix,
 757                                                 format,
 758                                                 DEFAULT_RELATIVE_IF_SHARED);
 759                                 i++;
 760                                 continue;
 761                         }
 762                         if (!strcmp(arg,"-n")) {
 763                                 if (++i >= argc)
 764                                         die(_("-n requires an argument"));
 765                                 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
 766                                         show(arg);
 767                                         show(argv[i]);
 768                                 }
 769                                 continue;
 770                         }
 771                         if (starts_with(arg, "-n")) {
 772                                 if ((filter & DO_FLAGS) && (filter & DO_REVS))
 773                                         show(arg);
 774                                 continue;
 775                         }
 776                         if (opt_with_value(arg, "--path-format", &arg)) {
 777                                 if (!arg)
 778                                         die(_("--path-format requires an argument"));
 779                                 if (!strcmp(arg, "absolute")) {
 780                                         format = FORMAT_CANONICAL;
 781                                 } else if (!strcmp(arg, "relative")) {
 782                                         format = FORMAT_RELATIVE;
 783                                 } else {
 784                                         die(_("unknown argument to --path-format: %s"), arg);
 785                                 }
 786                                 continue;
 787                         }
 788                         if (!strcmp(arg, "--default")) {
 789                                 def = argv[++i];
 790                                 if (!def)
 791                                         die(_("--default requires an argument"));
 792                                 continue;
 793                         }
 794                         if (!strcmp(arg, "--prefix")) {
 795                                 prefix = argv[++i];
 796                                 if (!prefix)
 797                                         die(_("--prefix requires an argument"));
 798                                 startup_info->prefix = prefix;
 799                                 output_prefix = 1;
 800                                 continue;
 801                         }
 802                         if (!strcmp(arg, "--revs-only")) {
 803                                 filter &= ~DO_NOREV;
 804                                 continue;
 805                         }
 806                         if (!strcmp(arg, "--no-revs")) {
 807                                 filter &= ~DO_REVS;
 808                                 continue;
 809                         }
 810                         if (!strcmp(arg, "--flags")) {
 811                                 filter &= ~DO_NONFLAGS;
 812                                 continue;
 813                         }
 814                         if (!strcmp(arg, "--no-flags")) {
 815                                 filter &= ~DO_FLAGS;
 816                                 continue;
 817                         }
 818                         if (!strcmp(arg, "--verify")) {
 819                                 filter &= ~(DO_FLAGS|DO_NOREV);
 820                                 verify = 1;
 821                                 continue;
 822                         }
 823                         if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
 824                                 quiet = 1;
 825                                 flags |= GET_OID_QUIETLY;
 826                                 continue;
 827                         }
 828                         if (opt_with_value(arg, "--short", &arg)) {
 829                                 filter &= ~(DO_FLAGS|DO_NOREV);
 830                                 verify = 1;
 831                                 abbrev = DEFAULT_ABBREV;
 832                                 if (!arg)
 833                                         continue;
 834                                 abbrev = strtoul(arg, NULL, 10);
 835                                 if (abbrev < MINIMUM_ABBREV)
 836                                         abbrev = MINIMUM_ABBREV;
 837                                 else if (hexsz <= abbrev)
 838                                         abbrev = hexsz;
 839                                 continue;
 840                         }
 841                         if (!strcmp(arg, "--sq")) {
 842                                 output_sq = 1;
 843                                 continue;
 844                         }
 845                         if (!strcmp(arg, "--not")) {
 846                                 show_type ^= REVERSED;
 847                                 continue;
 848                         }
 849                         if (!strcmp(arg, "--symbolic")) {
 850                                 symbolic = SHOW_SYMBOLIC_ASIS;
 851                                 continue;
 852                         }
 853                         if (!strcmp(arg, "--symbolic-full-name")) {
 854                                 symbolic = SHOW_SYMBOLIC_FULL;
 855                                 continue;
 856                         }
 857                         if (opt_with_value(arg, "--abbrev-ref", &arg)) {
 858                                 abbrev_ref = 1;
 859                                 abbrev_ref_strict = warn_ambiguous_refs;
 860                                 if (arg) {
 861                                         if (!strcmp(arg, "strict"))
 862                                                 abbrev_ref_strict = 1;
 863                                         else if (!strcmp(arg, "loose"))
 864                                                 abbrev_ref_strict = 0;
 865                                         else
 866                                                 die(_("unknown mode for --abbrev-ref: %s"),
 867                                                     arg);
 868                                 }
 869                                 continue;
 870                         }
 871                         if (!strcmp(arg, "--all")) {
 872                                 for_each_ref(show_reference, NULL);
 873                                 clear_ref_exclusions(&ref_excludes);
 874                                 continue;
 875                         }
 876                         if (skip_prefix(arg, "--disambiguate=", &arg)) {
 877                                 for_each_abbrev(arg, show_abbrev, NULL);
 878                                 continue;
 879                         }
 880                         if (!strcmp(arg, "--bisect")) {
 881                                 for_each_fullref_in("refs/bisect/bad", show_reference, NULL);
 882                                 for_each_fullref_in("refs/bisect/good", anti_reference, NULL);
 883                                 continue;
 884                         }
 885                         if (opt_with_value(arg, "--branches", &arg)) {
 886                                 if (ref_excludes.hidden_refs_configured)
 887                                         return error(_("--exclude-hidden cannot be used together with --branches"));
 888                                 handle_ref_opt(arg, "refs/heads/");
 889                                 continue;
 890                         }
 891                         if (opt_with_value(arg, "--tags", &arg)) {
 892                                 if (ref_excludes.hidden_refs_configured)
 893                                         return error(_("--exclude-hidden cannot be used together with --tags"));
 894                                 handle_ref_opt(arg, "refs/tags/");
 895                                 continue;
 896                         }
 897                         if (skip_prefix(arg, "--glob=", &arg)) {
 898                                 handle_ref_opt(arg, NULL);
 899                                 continue;
 900                         }
 901                         if (opt_with_value(arg, "--remotes", &arg)) {
 902                                 if (ref_excludes.hidden_refs_configured)
 903                                         return error(_("--exclude-hidden cannot be used together with --remotes"));
 904                                 handle_ref_opt(arg, "refs/remotes/");
 905                                 continue;
 906                         }
 907                         if (skip_prefix(arg, "--exclude=", &arg)) {
 908                                 add_ref_exclusion(&ref_excludes, arg);
 909                                 continue;
 910                         }
 911                         if (skip_prefix(arg, "--exclude-hidden=", &arg)) {
 912                                 exclude_hidden_refs(&ref_excludes, arg);
 913                                 continue;
 914                         }
 915                         if (!strcmp(arg, "--show-toplevel")) {
 916                                 const char *work_tree = get_git_work_tree();
 917                                 if (work_tree)
 918                                         print_path(work_tree, prefix, format, DEFAULT_UNMODIFIED);
 919                                 else
 920                                         die(_("this operation must be run in a work tree"));
 921                                 continue;
 922                         }
 923                         if (!strcmp(arg, "--show-superproject-working-tree")) {
 924                                 struct strbuf superproject = STRBUF_INIT;
 925                                 if (get_superproject_working_tree(&superproject))
 926                                         print_path(superproject.buf, prefix, format, DEFAULT_UNMODIFIED);
 927                                 strbuf_release(&superproject);
 928                                 continue;
 929                         }
 930                         if (!strcmp(arg, "--show-prefix")) {
 931                                 if (prefix)
 932                                         puts(prefix);
 933                                 else
 934                                         putchar('\n');
 935                                 continue;
 936                         }
 937                         if (!strcmp(arg, "--show-cdup")) {
 938                                 const char *pfx = prefix;
 939                                 if (!is_inside_work_tree()) {
 940                                         const char *work_tree =
 941                                                 get_git_work_tree();
 942                                         if (work_tree)
 943                                                 printf("%s\n", work_tree);
 944                                         continue;
 945                                 }
 946                                 while (pfx) {
 947                                         pfx = strchr(pfx, '/');
 948                                         if (pfx) {
 949                                                 pfx++;
 950                                                 printf("../");
 951                                         }
 952                                 }
 953                                 putchar('\n');
 954                                 continue;
 955                         }
 956                         if (!strcmp(arg, "--git-dir") ||
 957                             !strcmp(arg, "--absolute-git-dir")) {
 958                                 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
 959                                 char *cwd;
 960                                 int len;
 961                                 enum format_type wanted = format;
 962                                 if (arg[2] == 'g') {    /* --git-dir */
 963                                         if (gitdir) {
 964                                                 print_path(gitdir, prefix, format, DEFAULT_UNMODIFIED);
 965                                                 continue;
 966                                         }
 967                                         if (!prefix) {
 968                                                 print_path(".git", prefix, format, DEFAULT_UNMODIFIED);
 969                                                 continue;
 970                                         }
 971                                 } else {                /* --absolute-git-dir */
 972                                         wanted = FORMAT_CANONICAL;
 973                                         if (!gitdir && !prefix)
 974                                                 gitdir = ".git";
 975                                         if (gitdir) {
 976                                                 struct strbuf realpath = STRBUF_INIT;
 977                                                 strbuf_realpath(&realpath, gitdir, 1);
 978                                                 puts(realpath.buf);
 979                                                 strbuf_release(&realpath);
 980                                                 continue;
 981                                         }
 982                                 }
 983                                 cwd = xgetcwd();
 984                                 len = strlen(cwd);
 985                                 strbuf_reset(&buf);
 986                                 strbuf_addf(&buf, "%s%s.git", cwd, len && cwd[len-1] != '/' ? "/" : "");
 987                                 free(cwd);
 988                                 print_path(buf.buf, prefix, wanted, DEFAULT_CANONICAL);
 989                                 continue;
 990                         }
 991                         if (!strcmp(arg, "--git-common-dir")) {
 992                                 print_path(get_git_common_dir(), prefix, format, DEFAULT_RELATIVE_IF_SHARED);
 993                                 continue;
 994                         }
 995                         if (!strcmp(arg, "--is-inside-git-dir")) {
 996                                 printf("%s\n", is_inside_git_dir() ? "true"
 997                                                 : "false");
 998                                 continue;
 999                         }
1000                         if (!strcmp(arg, "--is-inside-work-tree")) {
1001                                 printf("%s\n", is_inside_work_tree() ? "true"
1002                                                 : "false");
1003                                 continue;
1004                         }
1005                         if (!strcmp(arg, "--is-bare-repository")) {
1006                                 printf("%s\n", is_bare_repository() ? "true"
1007                                                 : "false");
1008                                 continue;
1009                         }
1010                         if (!strcmp(arg, "--is-shallow-repository")) {
1011                                 printf("%s\n",
1012                                                 is_repository_shallow(the_repository) ? "true"
1013                                                 : "false");
1014                                 continue;
1015                         }
1016                         if (!strcmp(arg, "--shared-index-path")) {
1017                                 if (repo_read_index(the_repository) < 0)
1018                                         die(_("Could not read the index"));
1019                                 if (the_index.split_index) {
1020                                         const struct object_id *oid = &the_index.split_index->base_oid;
1021                                         const char *path = git_path("sharedindex.%s", oid_to_hex(oid));
1022                                         print_path(path, prefix, format, DEFAULT_RELATIVE);
1023                                 }
1024                                 continue;
1025                         }
1026                         if (skip_prefix(arg, "--since=", &arg)) {
1027                                 show_datestring("--max-age=", arg);
1028                                 continue;
1029                         }
1030                         if (skip_prefix(arg, "--after=", &arg)) {
1031                                 show_datestring("--max-age=", arg);
1032                                 continue;
1033                         }
1034                         if (skip_prefix(arg, "--before=", &arg)) {
1035                                 show_datestring("--min-age=", arg);
1036                                 continue;
1037                         }
1038                         if (skip_prefix(arg, "--until=", &arg)) {
1039                                 show_datestring("--min-age=", arg);
1040                                 continue;
1041                         }
1042                         if (opt_with_value(arg, "--show-object-format", &arg)) {
1043                                 const char *val = arg ? arg : "storage";
1044
1045                                 if (strcmp(val, "storage") &&
1046                                     strcmp(val, "input") &&
1047                                     strcmp(val, "output"))
1048                                         die(_("unknown mode for --show-object-format: %s"),
1049                                             arg);
1050                                 puts(the_hash_algo->name);
1051                                 continue;
1052                         }
1053                         if (!strcmp(arg, "--end-of-options")) {
1054                                 seen_end_of_options = 1;
1055                                 if (filter & (DO_FLAGS | DO_REVS))
1056                                         show_file(arg, 0);
1057                                 continue;
1058                         }
1059                         if (show_flag(arg) && verify)
1060                                 die_no_single_rev(quiet);
1061                         continue;
1062                 }
1063
1064                 /* Not a flag argument */
1065                 if (try_difference(arg))
1066                         continue;
1067                 if (try_parent_shorthands(arg))
1068                         continue;
1069                 name = arg;
1070                 type = NORMAL;
1071                 if (*arg == '^') {
1072                         name++;
1073                         type = REVERSED;
1074                 }
1075                 if (!get_oid_with_context(the_repository, name,
1076                                           flags, &oid, &unused)) {
1077                         if (verify)
1078                                 revs_count++;
1079                         else
1080                                 show_rev(type, &oid, name);
1081                         continue;
1082                 }
1083                 if (verify)
1084                         die_no_single_rev(quiet);
1085                 if (has_dashdash)
1086                         die(_("bad revision '%s'"), arg);
1087                 as_is = 1;
1088                 if (!show_file(arg, output_prefix))
1089                         continue;
1090                 verify_filename(prefix, arg, 1);
1091         }
1092         strbuf_release(&buf);
1093         if (verify) {
1094                 if (revs_count == 1) {
1095                         show_rev(type, &oid, name);
1096                         return 0;
1097                 } else if (revs_count == 0 && show_default())
1098                         return 0;
1099                 die_no_single_rev(quiet);
1100         } else
1101                 show_default();
1102         return 0;
1103 }