git.oblomov.eu Git - git/blob - builtin-update-index.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7 #include "quote.h"
   8 #include "cache-tree.h"
   9 #include "tree-walk.h"
  10 #include "builtin.h"
  11 #include "refs.h"
  12
  13 /*
  14  * Default to not allowing changes to the list of files. The
  15  * tool doesn't actually care, but this makes it harder to add
  16  * files to the revision control by mistake by doing something
  17  * like "git update-index *" and suddenly having all the object
  18  * files be revision controlled.
  19  */
  20 static int allow_add;
  21 static int allow_remove;
  22 static int allow_replace;
  23 static int info_only;
  24 static int force_remove;
  25 static int verbose;
  26 static int mark_valid_only;
  27 #define MARK_VALID 1
  28 #define UNMARK_VALID 2
  29
  30 __attribute__((format (printf, 1, 2)))
  31 static void report(const char *fmt, ...)
  32 {
  33         va_list vp;
  34
  35         if (!verbose)
  36                 return;
  37
  38         va_start(vp, fmt);
  39         vprintf(fmt, vp);
  40         putchar('\n');
  41         va_end(vp);
  42 }
  43
  44 static int mark_valid(const char *path)
  45 {
  46         int namelen = strlen(path);
  47         int pos = cache_name_pos(path, namelen);
  48         if (0 <= pos) {
  49                 switch (mark_valid_only) {
  50                 case MARK_VALID:
  51                         active_cache[pos]->ce_flags |= CE_VALID;
  52                         break;
  53                 case UNMARK_VALID:
  54                         active_cache[pos]->ce_flags &= ~CE_VALID;
  55                         break;
  56                 }
  57                 cache_tree_invalidate_path(active_cache_tree, path);
  58                 active_cache_changed = 1;
  59                 return 0;
  60         }
  61         return -1;
  62 }
  63
  64 static int remove_one_path(const char *path)
  65 {
  66         if (!allow_remove)
  67                 return error("%s: does not exist and --remove not passed", path);
  68         if (remove_file_from_cache(path))
  69                 return error("%s: cannot remove from the index", path);
  70         return 0;
  71 }
  72
  73 /*
  74  * Handle a path that couldn't be lstat'ed. It's either:
  75  *  - missing file (ENOENT or ENOTDIR). That's ok if we're
  76  *    supposed to be removing it and the removal actually
  77  *    succeeds.
  78  *  - permission error. That's never ok.
  79  */
  80 static int process_lstat_error(const char *path, int err)
  81 {
  82         if (err == ENOENT || err == ENOTDIR)
  83                 return remove_one_path(path);
  84         return error("lstat(\"%s\"): %s", path, strerror(errno));
  85 }
  86
  87 static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
  88 {
  89         int option, size;
  90         struct cache_entry *ce;
  91
  92         /* Was the old index entry already up-to-date? */
  93         if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
  94                 return 0;
  95
  96         size = cache_entry_size(len);
  97         ce = xcalloc(1, size);
  98         memcpy(ce->name, path, len);
  99         ce->ce_flags = len;
 100         fill_stat_cache_info(ce, st);
 101         ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
 102
 103         if (index_path(ce->sha1, path, st, !info_only))
 104                 return -1;
 105         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 106         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
 107         if (add_cache_entry(ce, option))
 108                 return error("%s: cannot add to the index - missing --add option?", path);
 109         return 0;
 110 }
 111
 112 /*
 113  * Handle a path that was a directory. Four cases:
 114  *
 115  *  - it's already a gitlink in the index, and we keep it that
 116  *    way, and update it if we can (if we cannot find the HEAD,
 117  *    we're going to keep it unchanged in the index!)
 118  *
 119  *  - it's a *file* in the index, in which case it should be
 120  *    removed as a file if removal is allowed, since it doesn't
 121  *    exist as such any more. If removal isn't allowed, it's
 122  *    an error.
 123  *
 124  *    (NOTE! This is old and arguably fairly strange behaviour.
 125  *    We might want to make this an error unconditionally, and
 126  *    use "--force-remove" if you actually want to force removal).
 127  *
 128  *  - it used to exist as a subdirectory (ie multiple files with
 129  *    this particular prefix) in the index, in which case it's wrong
 130  *    to try to update it as a directory.
 131  *
 132  *  - it doesn't exist at all in the index, but it is a valid
 133  *    git directory, and it should be *added* as a gitlink.
 134  */
 135 static int process_directory(const char *path, int len, struct stat *st)
 136 {
 137         unsigned char sha1[20];
 138         int pos = cache_name_pos(path, len);
 139
 140         /* Exact match: file or existing gitlink */
 141         if (pos >= 0) {
 142                 struct cache_entry *ce = active_cache[pos];
 143                 if (S_ISGITLINK(ce->ce_mode)) {
 144
 145                         /* Do nothing to the index if there is no HEAD! */
 146                         if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
 147                                 return 0;
 148
 149                         return add_one_path(ce, path, len, st);
 150                 }
 151                 /* Should this be an unconditional error? */
 152                 return remove_one_path(path);
 153         }
 154
 155         /* Inexact match: is there perhaps a subdirectory match? */
 156         pos = -pos-1;
 157         while (pos < active_nr) {
 158                 struct cache_entry *ce = active_cache[pos++];
 159
 160                 if (strncmp(ce->name, path, len))
 161                         break;
 162                 if (ce->name[len] > '/')
 163                         break;
 164                 if (ce->name[len] < '/')
 165                         continue;
 166
 167                 /* Subdirectory match - error out */
 168                 return error("%s: is a directory - add individual files instead", path);
 169         }
 170
 171         /* No match - should we add it as a gitlink? */
 172         if (!resolve_gitlink_ref(path, "HEAD", sha1))
 173                 return add_one_path(NULL, path, len, st);
 174
 175         /* Error out. */
 176         return error("%s: is a directory - add files inside instead", path);
 177 }
 178
 179 /*
 180  * Process a regular file
 181  */
 182 static int process_file(const char *path, int len, struct stat *st)
 183 {
 184         int pos = cache_name_pos(path, len);
 185         struct cache_entry *ce = pos < 0 ? NULL : active_cache[pos];
 186
 187         if (ce && S_ISGITLINK(ce->ce_mode))
 188                 return error("%s is already a gitlink, not replacing", path);
 189
 190         return add_one_path(ce, path, len, st);
 191 }
 192
 193 static int process_path(const char *path)
 194 {
 195         int len;
 196         struct stat st;
 197
 198         len = strlen(path);
 199         if (has_symlink_leading_path(path, len))
 200                 return error("'%s' is beyond a symbolic link", path);
 201
 202         /*
 203          * First things first: get the stat information, to decide
 204          * what to do about the pathname!
 205          */
 206         if (lstat(path, &st) < 0)
 207                 return process_lstat_error(path, errno);
 208
 209         if (S_ISDIR(st.st_mode))
 210                 return process_directory(path, len, &st);
 211
 212         return process_file(path, len, &st);
 213 }
 214
 215 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
 216                          const char *path, int stage)
 217 {
 218         int size, len, option;
 219         struct cache_entry *ce;
 220
 221         if (!verify_path(path))
 222                 return error("Invalid path '%s'", path);
 223
 224         len = strlen(path);
 225         size = cache_entry_size(len);
 226         ce = xcalloc(1, size);
 227
 228         hashcpy(ce->sha1, sha1);
 229         memcpy(ce->name, path, len);
 230         ce->ce_flags = create_ce_flags(len, stage);
 231         ce->ce_mode = create_ce_mode(mode);
 232         if (assume_unchanged)
 233                 ce->ce_flags |= CE_VALID;
 234         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 235         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
 236         if (add_cache_entry(ce, option))
 237                 return error("%s: cannot add to the index - missing --add option?",
 238                              path);
 239         report("add '%s'", path);
 240         return 0;
 241 }
 242
 243 static void chmod_path(int flip, const char *path)
 244 {
 245         int pos;
 246         struct cache_entry *ce;
 247         unsigned int mode;
 248
 249         pos = cache_name_pos(path, strlen(path));
 250         if (pos < 0)
 251                 goto fail;
 252         ce = active_cache[pos];
 253         mode = ce->ce_mode;
 254         if (!S_ISREG(mode))
 255                 goto fail;
 256         switch (flip) {
 257         case '+':
 258                 ce->ce_mode |= 0111; break;
 259         case '-':
 260                 ce->ce_mode &= ~0111; break;
 261         default:
 262                 goto fail;
 263         }
 264         cache_tree_invalidate_path(active_cache_tree, path);
 265         active_cache_changed = 1;
 266         report("chmod %cx '%s'", flip, path);
 267         return;
 268  fail:
 269         die("git update-index: cannot chmod %cx '%s'", flip, path);
 270 }
 271
 272 static void update_one(const char *path, const char *prefix, int prefix_length)
 273 {
 274         const char *p = prefix_path(prefix, prefix_length, path);
 275         if (!verify_path(p)) {
 276                 fprintf(stderr, "Ignoring path %s\n", path);
 277                 goto free_return;
 278         }
 279         if (mark_valid_only) {
 280                 if (mark_valid(p))
 281                         die("Unable to mark file %s", path);
 282                 goto free_return;
 283         }
 284
 285         if (force_remove) {
 286                 if (remove_file_from_cache(p))
 287                         die("git update-index: unable to remove %s", path);
 288                 report("remove '%s'", path);
 289                 goto free_return;
 290         }
 291         if (process_path(p))
 292                 die("Unable to process path %s", path);
 293         report("add '%s'", path);
 294  free_return:
 295         if (p < path || p > path + strlen(path))
 296                 free((char *)p);
 297 }
 298
 299 static void read_index_info(int line_termination)
 300 {
 301         struct strbuf buf = STRBUF_INIT;
 302         struct strbuf uq = STRBUF_INIT;
 303
 304         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 305                 char *ptr, *tab;
 306                 char *path_name;
 307                 unsigned char sha1[20];
 308                 unsigned int mode;
 309                 unsigned long ul;
 310                 int stage;
 311
 312                 /* This reads lines formatted in one of three formats:
 313                  *
 314                  * (1) mode         SP sha1          TAB path
 315                  * The first format is what "git apply --index-info"
 316                  * reports, and used to reconstruct a partial tree
 317                  * that is used for phony merge base tree when falling
 318                  * back on 3-way merge.
 319                  *
 320                  * (2) mode SP type SP sha1          TAB path
 321                  * The second format is to stuff "git ls-tree" output
 322                  * into the index file.
 323                  *
 324                  * (3) mode         SP sha1 SP stage TAB path
 325                  * This format is to put higher order stages into the
 326                  * index file and matches "git ls-files --stage" output.
 327                  */
 328                 errno = 0;
 329                 ul = strtoul(buf.buf, &ptr, 8);
 330                 if (ptr == buf.buf || *ptr != ' '
 331                     || errno || (unsigned int) ul != ul)
 332                         goto bad_line;
 333                 mode = ul;
 334
 335                 tab = strchr(ptr, '\t');
 336                 if (!tab || tab - ptr < 41)
 337                         goto bad_line;
 338
 339                 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
 340                         stage = tab[-1] - '0';
 341                         ptr = tab + 1; /* point at the head of path */
 342                         tab = tab - 2; /* point at tail of sha1 */
 343                 }
 344                 else {
 345                         stage = 0;
 346                         ptr = tab + 1; /* point at the head of path */
 347                 }
 348
 349                 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
 350                         goto bad_line;
 351
 352                 path_name = ptr;
 353                 if (line_termination && path_name[0] == '"') {
 354                         strbuf_reset(&uq);
 355                         if (unquote_c_style(&uq, path_name, NULL)) {
 356                                 die("git update-index: bad quoting of path name");
 357                         }
 358                         path_name = uq.buf;
 359                 }
 360
 361                 if (!verify_path(path_name)) {
 362                         fprintf(stderr, "Ignoring path %s\n", path_name);
 363                         continue;
 364                 }
 365
 366                 if (!mode) {
 367                         /* mode == 0 means there is no such path -- remove */
 368                         if (remove_file_from_cache(path_name))
 369                                 die("git update-index: unable to remove %s",
 370                                     ptr);
 371                 }
 372                 else {
 373                         /* mode ' ' sha1 '\t' name
 374                          * ptr[-1] points at tab,
 375                          * ptr[-41] is at the beginning of sha1
 376                          */
 377                         ptr[-42] = ptr[-1] = 0;
 378                         if (add_cacheinfo(mode, sha1, path_name, stage))
 379                                 die("git update-index: unable to update %s",
 380                                     path_name);
 381                 }
 382                 continue;
 383
 384         bad_line:
 385                 die("malformed index info %s", buf.buf);
 386         }
 387         strbuf_release(&buf);
 388         strbuf_release(&uq);
 389 }
 390
 391 static const char update_index_usage[] =
 392 "git update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again | -g] [--ignore-missing] [-z] [--verbose] [--] <file>...";
 393
 394 static unsigned char head_sha1[20];
 395 static unsigned char merge_head_sha1[20];
 396
 397 static struct cache_entry *read_one_ent(const char *which,
 398                                         unsigned char *ent, const char *path,
 399                                         int namelen, int stage)
 400 {
 401         unsigned mode;
 402         unsigned char sha1[20];
 403         int size;
 404         struct cache_entry *ce;
 405
 406         if (get_tree_entry(ent, path, sha1, &mode)) {
 407                 if (which)
 408                         error("%s: not in %s branch.", path, which);
 409                 return NULL;
 410         }
 411         if (mode == S_IFDIR) {
 412                 if (which)
 413                         error("%s: not a blob in %s branch.", path, which);
 414                 return NULL;
 415         }
 416         size = cache_entry_size(namelen);
 417         ce = xcalloc(1, size);
 418
 419         hashcpy(ce->sha1, sha1);
 420         memcpy(ce->name, path, namelen);
 421         ce->ce_flags = create_ce_flags(namelen, stage);
 422         ce->ce_mode = create_ce_mode(mode);
 423         return ce;
 424 }
 425
 426 static int unresolve_one(const char *path)
 427 {
 428         int namelen = strlen(path);
 429         int pos;
 430         int ret = 0;
 431         struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
 432
 433         /* See if there is such entry in the index. */
 434         pos = cache_name_pos(path, namelen);
 435         if (pos < 0) {
 436                 /* If there isn't, either it is unmerged, or
 437                  * resolved as "removed" by mistake.  We do not
 438                  * want to do anything in the former case.
 439                  */
 440                 pos = -pos-1;
 441                 if (pos < active_nr) {
 442                         struct cache_entry *ce = active_cache[pos];
 443                         if (ce_namelen(ce) == namelen &&
 444                             !memcmp(ce->name, path, namelen)) {
 445                                 fprintf(stderr,
 446                                         "%s: skipping still unmerged path.\n",
 447                                         path);
 448                                 goto free_return;
 449                         }
 450                 }
 451         }
 452
 453         /* Grab blobs from given path from HEAD and MERGE_HEAD,
 454          * stuff HEAD version in stage #2,
 455          * stuff MERGE_HEAD version in stage #3.
 456          */
 457         ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
 458         ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
 459
 460         if (!ce_2 || !ce_3) {
 461                 ret = -1;
 462                 goto free_return;
 463         }
 464         if (!hashcmp(ce_2->sha1, ce_3->sha1) &&
 465             ce_2->ce_mode == ce_3->ce_mode) {
 466                 fprintf(stderr, "%s: identical in both, skipping.\n",
 467                         path);
 468                 goto free_return;
 469         }
 470
 471         remove_file_from_cache(path);
 472         if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
 473                 error("%s: cannot add our version to the index.", path);
 474                 ret = -1;
 475                 goto free_return;
 476         }
 477         if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
 478                 return 0;
 479         error("%s: cannot add their version to the index.", path);
 480         ret = -1;
 481  free_return:
 482         free(ce_2);
 483         free(ce_3);
 484         return ret;
 485 }
 486
 487 static void read_head_pointers(void)
 488 {
 489         if (read_ref("HEAD", head_sha1))
 490                 die("No HEAD -- no initial commit yet?");
 491         if (read_ref("MERGE_HEAD", merge_head_sha1)) {
 492                 fprintf(stderr, "Not in the middle of a merge.\n");
 493                 exit(0);
 494         }
 495 }
 496
 497 static int do_unresolve(int ac, const char **av,
 498                         const char *prefix, int prefix_length)
 499 {
 500         int i;
 501         int err = 0;
 502
 503         /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
 504          * are not doing a merge, so exit with success status.
 505          */
 506         read_head_pointers();
 507
 508         for (i = 1; i < ac; i++) {
 509                 const char *arg = av[i];
 510                 const char *p = prefix_path(prefix, prefix_length, arg);
 511                 err |= unresolve_one(p);
 512                 if (p < arg || p > arg + strlen(arg))
 513                         free((char *)p);
 514         }
 515         return err;
 516 }
 517
 518 static int do_reupdate(int ac, const char **av,
 519                        const char *prefix, int prefix_length)
 520 {
 521         /* Read HEAD and run update-index on paths that are
 522          * merged and already different between index and HEAD.
 523          */
 524         int pos;
 525         int has_head = 1;
 526         const char **pathspec = get_pathspec(prefix, av + 1);
 527
 528         if (read_ref("HEAD", head_sha1))
 529                 /* If there is no HEAD, that means it is an initial
 530                  * commit.  Update everything in the index.
 531                  */
 532                 has_head = 0;
 533  redo:
 534         for (pos = 0; pos < active_nr; pos++) {
 535                 struct cache_entry *ce = active_cache[pos];
 536                 struct cache_entry *old = NULL;
 537                 int save_nr;
 538
 539                 if (ce_stage(ce) || !ce_path_match(ce, pathspec))
 540                         continue;
 541                 if (has_head)
 542                         old = read_one_ent(NULL, head_sha1,
 543                                            ce->name, ce_namelen(ce), 0);
 544                 if (old && ce->ce_mode == old->ce_mode &&
 545                     !hashcmp(ce->sha1, old->sha1)) {
 546                         free(old);
 547                         continue; /* unchanged */
 548                 }
 549                 /* Be careful.  The working tree may not have the
 550                  * path anymore, in which case, under 'allow_remove',
 551                  * or worse yet 'allow_replace', active_nr may decrease.
 552                  */
 553                 save_nr = active_nr;
 554                 update_one(ce->name + prefix_length, prefix, prefix_length);
 555                 if (save_nr != active_nr)
 556                         goto redo;
 557         }
 558         return 0;
 559 }
 560
 561 int cmd_update_index(int argc, const char **argv, const char *prefix)
 562 {
 563         int i, newfd, entries, has_errors = 0, line_termination = '\n';
 564         int allow_options = 1;
 565         int read_from_stdin = 0;
 566         int prefix_length = prefix ? strlen(prefix) : 0;
 567         char set_executable_bit = 0;
 568         unsigned int refresh_flags = 0;
 569         int lock_error = 0;
 570         struct lock_file *lock_file;
 571
 572         git_config(git_default_config, NULL);
 573
 574         /* We can't free this memory, it becomes part of a linked list parsed atexit() */
 575         lock_file = xcalloc(1, sizeof(struct lock_file));
 576
 577         newfd = hold_locked_index(lock_file, 0);
 578         if (newfd < 0)
 579                 lock_error = errno;
 580
 581         entries = read_cache();
 582         if (entries < 0)
 583                 die("cache corrupted");
 584
 585         for (i = 1 ; i < argc; i++) {
 586                 const char *path = argv[i];
 587                 const char *p;
 588
 589                 if (allow_options && *path == '-') {
 590                         if (!strcmp(path, "--")) {
 591                                 allow_options = 0;
 592                                 continue;
 593                         }
 594                         if (!strcmp(path, "-q")) {
 595                                 refresh_flags |= REFRESH_QUIET;
 596                                 continue;
 597                         }
 598                         if (!strcmp(path, "--ignore-submodules")) {
 599                                 refresh_flags |= REFRESH_IGNORE_SUBMODULES;
 600                                 continue;
 601                         }
 602                         if (!strcmp(path, "--add")) {
 603                                 allow_add = 1;
 604                                 continue;
 605                         }
 606                         if (!strcmp(path, "--replace")) {
 607                                 allow_replace = 1;
 608                                 continue;
 609                         }
 610                         if (!strcmp(path, "--remove")) {
 611                                 allow_remove = 1;
 612                                 continue;
 613                         }
 614                         if (!strcmp(path, "--unmerged")) {
 615                                 refresh_flags |= REFRESH_UNMERGED;
 616                                 continue;
 617                         }
 618                         if (!strcmp(path, "--refresh")) {
 619                                 setup_work_tree();
 620                                 has_errors |= refresh_cache(refresh_flags);
 621                                 continue;
 622                         }
 623                         if (!strcmp(path, "--really-refresh")) {
 624                                 setup_work_tree();
 625                                 has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
 626                                 continue;
 627                         }
 628                         if (!strcmp(path, "--cacheinfo")) {
 629                                 unsigned char sha1[20];
 630                                 unsigned int mode;
 631
 632                                 if (i+3 >= argc)
 633                                         die("git update-index: --cacheinfo <mode> <sha1> <path>");
 634
 635                                 if (strtoul_ui(argv[i+1], 8, &mode) ||
 636                                     get_sha1_hex(argv[i+2], sha1) ||
 637                                     add_cacheinfo(mode, sha1, argv[i+3], 0))
 638                                         die("git update-index: --cacheinfo"
 639                                             " cannot add %s", argv[i+3]);
 640                                 i += 3;
 641                                 continue;
 642                         }
 643                         if (!strcmp(path, "--chmod=-x") ||
 644                             !strcmp(path, "--chmod=+x")) {
 645                                 if (argc <= i+1)
 646                                         die("git update-index: %s <path>", path);
 647                                 set_executable_bit = path[8];
 648                                 continue;
 649                         }
 650                         if (!strcmp(path, "--assume-unchanged")) {
 651                                 mark_valid_only = MARK_VALID;
 652                                 continue;
 653                         }
 654                         if (!strcmp(path, "--no-assume-unchanged")) {
 655                                 mark_valid_only = UNMARK_VALID;
 656                                 continue;
 657                         }
 658                         if (!strcmp(path, "--info-only")) {
 659                                 info_only = 1;
 660                                 continue;
 661                         }
 662                         if (!strcmp(path, "--force-remove")) {
 663                                 force_remove = 1;
 664                                 continue;
 665                         }
 666                         if (!strcmp(path, "-z")) {
 667                                 line_termination = 0;
 668                                 continue;
 669                         }
 670                         if (!strcmp(path, "--stdin")) {
 671                                 if (i != argc - 1)
 672                                         die("--stdin must be at the end");
 673                                 read_from_stdin = 1;
 674                                 break;
 675                         }
 676                         if (!strcmp(path, "--index-info")) {
 677                                 if (i != argc - 1)
 678                                         die("--index-info must be at the end");
 679                                 allow_add = allow_replace = allow_remove = 1;
 680                                 read_index_info(line_termination);
 681                                 break;
 682                         }
 683                         if (!strcmp(path, "--unresolve")) {
 684                                 has_errors = do_unresolve(argc - i, argv + i,
 685                                                           prefix, prefix_length);
 686                                 if (has_errors)
 687                                         active_cache_changed = 0;
 688                                 goto finish;
 689                         }
 690                         if (!strcmp(path, "--again") || !strcmp(path, "-g")) {
 691                                 setup_work_tree();
 692                                 has_errors = do_reupdate(argc - i, argv + i,
 693                                                          prefix, prefix_length);
 694                                 if (has_errors)
 695                                         active_cache_changed = 0;
 696                                 goto finish;
 697                         }
 698                         if (!strcmp(path, "--ignore-missing")) {
 699                                 refresh_flags |= REFRESH_IGNORE_MISSING;
 700                                 continue;
 701                         }
 702                         if (!strcmp(path, "--verbose")) {
 703                                 verbose = 1;
 704                                 continue;
 705                         }
 706                         if (!strcmp(path, "-h") || !strcmp(path, "--help"))
 707                                 usage(update_index_usage);
 708                         die("unknown option %s", path);
 709                 }
 710                 setup_work_tree();
 711                 p = prefix_path(prefix, prefix_length, path);
 712                 update_one(p, NULL, 0);
 713                 if (set_executable_bit)
 714                         chmod_path(set_executable_bit, p);
 715                 if (p < path || p > path + strlen(path))
 716                         free((char *)p);
 717         }
 718         if (read_from_stdin) {
 719                 struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
 720
 721                 setup_work_tree();
 722                 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 723                         const char *p;
 724                         if (line_termination && buf.buf[0] == '"') {
 725                                 strbuf_reset(&nbuf);
 726                                 if (unquote_c_style(&nbuf, buf.buf, NULL))
 727                                         die("line is badly quoted");
 728                                 strbuf_swap(&buf, &nbuf);
 729                         }
 730                         p = prefix_path(prefix, prefix_length, buf.buf);
 731                         update_one(p, NULL, 0);
 732                         if (set_executable_bit)
 733                                 chmod_path(set_executable_bit, p);
 734                         if (p < buf.buf || p > buf.buf + buf.len)
 735                                 free((char *)p);
 736                 }
 737                 strbuf_release(&nbuf);
 738                 strbuf_release(&buf);
 739         }
 740
 741  finish:
 742         if (active_cache_changed) {
 743                 if (newfd < 0) {
 744                         if (refresh_flags & REFRESH_QUIET)
 745                                 exit(128);
 746                         unable_to_lock_index_die(get_index_file(), lock_error);
 747                 }
 748                 if (write_cache(newfd, active_cache, active_nr) ||
 749                     commit_locked_index(lock_file))
 750                         die("Unable to write new index file");
 751         }
 752
 753         rollback_lock_file(lock_file);
 754
 755         return has_errors ? 1 : 0;
 756 }