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 static int mark_skip_worktree_only;
  28 #define MARK_FLAG 1
  29 #define UNMARK_FLAG 2
  30
  31 __attribute__((format (printf, 1, 2)))
  32 static void report(const char *fmt, ...)
  33 {
  34         va_list vp;
  35
  36         if (!verbose)
  37                 return;
  38
  39         va_start(vp, fmt);
  40         vprintf(fmt, vp);
  41         putchar('\n');
  42         va_end(vp);
  43 }
  44
  45 static int mark_ce_flags(const char *path, int flag, int mark)
  46 {
  47         int namelen = strlen(path);
  48         int pos = cache_name_pos(path, namelen);
  49         if (0 <= pos) {
  50                 if (mark)
  51                         active_cache[pos]->ce_flags |= flag;
  52                 else
  53                         active_cache[pos]->ce_flags &= ~flag;
  54                 cache_tree_invalidate_path(active_cache_tree, path);
  55                 active_cache_changed = 1;
  56                 return 0;
  57         }
  58         return -1;
  59 }
  60
  61 static int remove_one_path(const char *path)
  62 {
  63         if (!allow_remove)
  64                 return error("%s: does not exist and --remove not passed", path);
  65         if (remove_file_from_cache(path))
  66                 return error("%s: cannot remove from the index", path);
  67         return 0;
  68 }
  69
  70 /*
  71  * Handle a path that couldn't be lstat'ed. It's either:
  72  *  - missing file (ENOENT or ENOTDIR). That's ok if we're
  73  *    supposed to be removing it and the removal actually
  74  *    succeeds.
  75  *  - permission error. That's never ok.
  76  */
  77 static int process_lstat_error(const char *path, int err)
  78 {
  79         if (err == ENOENT || err == ENOTDIR)
  80                 return remove_one_path(path);
  81         return error("lstat(\"%s\"): %s", path, strerror(errno));
  82 }
  83
  84 static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
  85 {
  86         int option, size;
  87         struct cache_entry *ce;
  88
  89         /* Was the old index entry already up-to-date? */
  90         if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
  91                 return 0;
  92
  93         size = cache_entry_size(len);
  94         ce = xcalloc(1, size);
  95         memcpy(ce->name, path, len);
  96         ce->ce_flags = len;
  97         fill_stat_cache_info(ce, st);
  98         ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
  99
 100         if (index_path(ce->sha1, path, st, !info_only))
 101                 return -1;
 102         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 103         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
 104         if (add_cache_entry(ce, option))
 105                 return error("%s: cannot add to the index - missing --add option?", path);
 106         return 0;
 107 }
 108
 109 /*
 110  * Handle a path that was a directory. Four cases:
 111  *
 112  *  - it's already a gitlink in the index, and we keep it that
 113  *    way, and update it if we can (if we cannot find the HEAD,
 114  *    we're going to keep it unchanged in the index!)
 115  *
 116  *  - it's a *file* in the index, in which case it should be
 117  *    removed as a file if removal is allowed, since it doesn't
 118  *    exist as such any more. If removal isn't allowed, it's
 119  *    an error.
 120  *
 121  *    (NOTE! This is old and arguably fairly strange behaviour.
 122  *    We might want to make this an error unconditionally, and
 123  *    use "--force-remove" if you actually want to force removal).
 124  *
 125  *  - it used to exist as a subdirectory (ie multiple files with
 126  *    this particular prefix) in the index, in which case it's wrong
 127  *    to try to update it as a directory.
 128  *
 129  *  - it doesn't exist at all in the index, but it is a valid
 130  *    git directory, and it should be *added* as a gitlink.
 131  */
 132 static int process_directory(const char *path, int len, struct stat *st)
 133 {
 134         unsigned char sha1[20];
 135         int pos = cache_name_pos(path, len);
 136
 137         /* Exact match: file or existing gitlink */
 138         if (pos >= 0) {
 139                 struct cache_entry *ce = active_cache[pos];
 140                 if (S_ISGITLINK(ce->ce_mode)) {
 141
 142                         /* Do nothing to the index if there is no HEAD! */
 143                         if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
 144                                 return 0;
 145
 146                         return add_one_path(ce, path, len, st);
 147                 }
 148                 /* Should this be an unconditional error? */
 149                 return remove_one_path(path);
 150         }
 151
 152         /* Inexact match: is there perhaps a subdirectory match? */
 153         pos = -pos-1;
 154         while (pos < active_nr) {
 155                 struct cache_entry *ce = active_cache[pos++];
 156
 157                 if (strncmp(ce->name, path, len))
 158                         break;
 159                 if (ce->name[len] > '/')
 160                         break;
 161                 if (ce->name[len] < '/')
 162                         continue;
 163
 164                 /* Subdirectory match - error out */
 165                 return error("%s: is a directory - add individual files instead", path);
 166         }
 167
 168         /* No match - should we add it as a gitlink? */
 169         if (!resolve_gitlink_ref(path, "HEAD", sha1))
 170                 return add_one_path(NULL, path, len, st);
 171
 172         /* Error out. */
 173         return error("%s: is a directory - add files inside instead", path);
 174 }
 175
 176 static int process_path(const char *path)
 177 {
 178         int pos, len;
 179         struct stat st;
 180         struct cache_entry *ce;
 181
 182         len = strlen(path);
 183         if (has_symlink_leading_path(path, len))
 184                 return error("'%s' is beyond a symbolic link", path);
 185
 186         pos = cache_name_pos(path, len);
 187         ce = pos < 0 ? NULL : active_cache[pos];
 188         if (ce && ce_skip_worktree(ce)) {
 189                 /*
 190                  * working directory version is assumed "good"
 191                  * so updating it does not make sense.
 192                  * On the other hand, removing it from index should work
 193                  */
 194                 if (allow_remove && remove_file_from_cache(path))
 195                         return error("%s: cannot remove from the index", path);
 196                 return 0;
 197         }
 198
 199         /*
 200          * First things first: get the stat information, to decide
 201          * what to do about the pathname!
 202          */
 203         if (lstat(path, &st) < 0)
 204                 return process_lstat_error(path, errno);
 205
 206         if (S_ISDIR(st.st_mode))
 207                 return process_directory(path, len, &st);
 208
 209         /*
 210          * Process a regular file
 211          */
 212         if (ce && S_ISGITLINK(ce->ce_mode))
 213                 return error("%s is already a gitlink, not replacing", path);
 214
 215         return add_one_path(ce, path, len, &st);
 216 }
 217
 218 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
 219                          const char *path, int stage)
 220 {
 221         int size, len, option;
 222         struct cache_entry *ce;
 223
 224         if (!verify_path(path))
 225                 return error("Invalid path '%s'", path);
 226
 227         len = strlen(path);
 228         size = cache_entry_size(len);
 229         ce = xcalloc(1, size);
 230
 231         hashcpy(ce->sha1, sha1);
 232         memcpy(ce->name, path, len);
 233         ce->ce_flags = create_ce_flags(len, stage);
 234         ce->ce_mode = create_ce_mode(mode);
 235         if (assume_unchanged)
 236                 ce->ce_flags |= CE_VALID;
 237         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 238         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
 239         if (add_cache_entry(ce, option))
 240                 return error("%s: cannot add to the index - missing --add option?",
 241                              path);
 242         report("add '%s'", path);
 243         return 0;
 244 }
 245
 246 static void chmod_path(int flip, const char *path)
 247 {
 248         int pos;
 249         struct cache_entry *ce;
 250         unsigned int mode;
 251
 252         pos = cache_name_pos(path, strlen(path));
 253         if (pos < 0)
 254                 goto fail;
 255         ce = active_cache[pos];
 256         mode = ce->ce_mode;
 257         if (!S_ISREG(mode))
 258                 goto fail;
 259         switch (flip) {
 260         case '+':
 261                 ce->ce_mode |= 0111; break;
 262         case '-':
 263                 ce->ce_mode &= ~0111; break;
 264         default:
 265                 goto fail;
 266         }
 267         cache_tree_invalidate_path(active_cache_tree, path);
 268         active_cache_changed = 1;
 269         report("chmod %cx '%s'", flip, path);
 270         return;
 271  fail:
 272         die("git update-index: cannot chmod %cx '%s'", flip, path);
 273 }
 274
 275 static void update_one(const char *path, const char *prefix, int prefix_length)
 276 {
 277         const char *p = prefix_path(prefix, prefix_length, path);
 278         if (!verify_path(p)) {
 279                 fprintf(stderr, "Ignoring path %s\n", path);
 280                 goto free_return;
 281         }
 282         if (mark_valid_only) {
 283                 if (mark_ce_flags(p, CE_VALID, mark_valid_only == MARK_FLAG))
 284                         die("Unable to mark file %s", path);
 285                 goto free_return;
 286         }
 287         if (mark_skip_worktree_only) {
 288                 if (mark_ce_flags(p, CE_SKIP_WORKTREE, mark_skip_worktree_only == MARK_FLAG))
 289                         die("Unable to mark file %s", path);
 290                 goto free_return;
 291         }
 292
 293         if (force_remove) {
 294                 if (remove_file_from_cache(p))
 295                         die("git update-index: unable to remove %s", path);
 296                 report("remove '%s'", path);
 297                 goto free_return;
 298         }
 299         if (process_path(p))
 300                 die("Unable to process path %s", path);
 301         report("add '%s'", path);
 302  free_return:
 303         if (p < path || p > path + strlen(path))
 304                 free((char *)p);
 305 }
 306
 307 static void read_index_info(int line_termination)
 308 {
 309         struct strbuf buf = STRBUF_INIT;
 310         struct strbuf uq = STRBUF_INIT;
 311
 312         while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 313                 char *ptr, *tab;
 314                 char *path_name;
 315                 unsigned char sha1[20];
 316                 unsigned int mode;
 317                 unsigned long ul;
 318                 int stage;
 319
 320                 /* This reads lines formatted in one of three formats:
 321                  *
 322                  * (1) mode         SP sha1          TAB path
 323                  * The first format is what "git apply --index-info"
 324                  * reports, and used to reconstruct a partial tree
 325                  * that is used for phony merge base tree when falling
 326                  * back on 3-way merge.
 327                  *
 328                  * (2) mode SP type SP sha1          TAB path
 329                  * The second format is to stuff "git ls-tree" output
 330                  * into the index file.
 331                  *
 332                  * (3) mode         SP sha1 SP stage TAB path
 333                  * This format is to put higher order stages into the
 334                  * index file and matches "git ls-files --stage" output.
 335                  */
 336                 errno = 0;
 337                 ul = strtoul(buf.buf, &ptr, 8);
 338                 if (ptr == buf.buf || *ptr != ' '
 339                     || errno || (unsigned int) ul != ul)
 340                         goto bad_line;
 341                 mode = ul;
 342
 343                 tab = strchr(ptr, '\t');
 344                 if (!tab || tab - ptr < 41)
 345                         goto bad_line;
 346
 347                 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
 348                         stage = tab[-1] - '0';
 349                         ptr = tab + 1; /* point at the head of path */
 350                         tab = tab - 2; /* point at tail of sha1 */
 351                 }
 352                 else {
 353                         stage = 0;
 354                         ptr = tab + 1; /* point at the head of path */
 355                 }
 356
 357                 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
 358                         goto bad_line;
 359
 360                 path_name = ptr;
 361                 if (line_termination && path_name[0] == '"') {
 362                         strbuf_reset(&uq);
 363                         if (unquote_c_style(&uq, path_name, NULL)) {
 364                                 die("git update-index: bad quoting of path name");
 365                         }
 366                         path_name = uq.buf;
 367                 }
 368
 369                 if (!verify_path(path_name)) {
 370                         fprintf(stderr, "Ignoring path %s\n", path_name);
 371                         continue;
 372                 }
 373
 374                 if (!mode) {
 375                         /* mode == 0 means there is no such path -- remove */
 376                         if (remove_file_from_cache(path_name))
 377                                 die("git update-index: unable to remove %s",
 378                                     ptr);
 379                 }
 380                 else {
 381                         /* mode ' ' sha1 '\t' name
 382                          * ptr[-1] points at tab,
 383                          * ptr[-41] is at the beginning of sha1
 384                          */
 385                         ptr[-42] = ptr[-1] = 0;
 386                         if (add_cacheinfo(mode, sha1, path_name, stage))
 387                                 die("git update-index: unable to update %s",
 388                                     path_name);
 389                 }
 390                 continue;
 391
 392         bad_line:
 393                 die("malformed index info %s", buf.buf);
 394         }
 395         strbuf_release(&buf);
 396         strbuf_release(&uq);
 397 }
 398
 399 static const char update_index_usage[] =
 400 "git update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--skip-worktree|--no-skip-worktree] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again | -g] [--ignore-missing] [-z] [--verbose] [--] <file>...";
 401
 402 static unsigned char head_sha1[20];
 403 static unsigned char merge_head_sha1[20];
 404
 405 static struct cache_entry *read_one_ent(const char *which,
 406                                         unsigned char *ent, const char *path,
 407                                         int namelen, int stage)
 408 {
 409         unsigned mode;
 410         unsigned char sha1[20];
 411         int size;
 412         struct cache_entry *ce;
 413
 414         if (get_tree_entry(ent, path, sha1, &mode)) {
 415                 if (which)
 416                         error("%s: not in %s branch.", path, which);
 417                 return NULL;
 418         }
 419         if (mode == S_IFDIR) {
 420                 if (which)
 421                         error("%s: not a blob in %s branch.", path, which);
 422                 return NULL;
 423         }
 424         size = cache_entry_size(namelen);
 425         ce = xcalloc(1, size);
 426
 427         hashcpy(ce->sha1, sha1);
 428         memcpy(ce->name, path, namelen);
 429         ce->ce_flags = create_ce_flags(namelen, stage);
 430         ce->ce_mode = create_ce_mode(mode);
 431         return ce;
 432 }
 433
 434 static int unresolve_one(const char *path)
 435 {
 436         int namelen = strlen(path);
 437         int pos;
 438         int ret = 0;
 439         struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
 440
 441         /* See if there is such entry in the index. */
 442         pos = cache_name_pos(path, namelen);
 443         if (pos < 0) {
 444                 /* If there isn't, either it is unmerged, or
 445                  * resolved as "removed" by mistake.  We do not
 446                  * want to do anything in the former case.
 447                  */
 448                 pos = -pos-1;
 449                 if (pos < active_nr) {
 450                         struct cache_entry *ce = active_cache[pos];
 451                         if (ce_namelen(ce) == namelen &&
 452                             !memcmp(ce->name, path, namelen)) {
 453                                 fprintf(stderr,
 454                                         "%s: skipping still unmerged path.\n",
 455                                         path);
 456                                 goto free_return;
 457                         }
 458                 }
 459         }
 460
 461         /* Grab blobs from given path from HEAD and MERGE_HEAD,
 462          * stuff HEAD version in stage #2,
 463          * stuff MERGE_HEAD version in stage #3.
 464          */
 465         ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
 466         ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
 467
 468         if (!ce_2 || !ce_3) {
 469                 ret = -1;
 470                 goto free_return;
 471         }
 472         if (!hashcmp(ce_2->sha1, ce_3->sha1) &&
 473             ce_2->ce_mode == ce_3->ce_mode) {
 474                 fprintf(stderr, "%s: identical in both, skipping.\n",
 475                         path);
 476                 goto free_return;
 477         }
 478
 479         remove_file_from_cache(path);
 480         if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
 481                 error("%s: cannot add our version to the index.", path);
 482                 ret = -1;
 483                 goto free_return;
 484         }
 485         if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
 486                 return 0;
 487         error("%s: cannot add their version to the index.", path);
 488         ret = -1;
 489  free_return:
 490         free(ce_2);
 491         free(ce_3);
 492         return ret;
 493 }
 494
 495 static void read_head_pointers(void)
 496 {
 497         if (read_ref("HEAD", head_sha1))
 498                 die("No HEAD -- no initial commit yet?");
 499         if (read_ref("MERGE_HEAD", merge_head_sha1)) {
 500                 fprintf(stderr, "Not in the middle of a merge.\n");
 501                 exit(0);
 502         }
 503 }
 504
 505 static int do_unresolve(int ac, const char **av,
 506                         const char *prefix, int prefix_length)
 507 {
 508         int i;
 509         int err = 0;
 510
 511         /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
 512          * are not doing a merge, so exit with success status.
 513          */
 514         read_head_pointers();
 515
 516         for (i = 1; i < ac; i++) {
 517                 const char *arg = av[i];
 518                 const char *p = prefix_path(prefix, prefix_length, arg);
 519                 err |= unresolve_one(p);
 520                 if (p < arg || p > arg + strlen(arg))
 521                         free((char *)p);
 522         }
 523         return err;
 524 }
 525
 526 static int do_reupdate(int ac, const char **av,
 527                        const char *prefix, int prefix_length)
 528 {
 529         /* Read HEAD and run update-index on paths that are
 530          * merged and already different between index and HEAD.
 531          */
 532         int pos;
 533         int has_head = 1;
 534         const char **pathspec = get_pathspec(prefix, av + 1);
 535
 536         if (read_ref("HEAD", head_sha1))
 537                 /* If there is no HEAD, that means it is an initial
 538                  * commit.  Update everything in the index.
 539                  */
 540                 has_head = 0;
 541  redo:
 542         for (pos = 0; pos < active_nr; pos++) {
 543                 struct cache_entry *ce = active_cache[pos];
 544                 struct cache_entry *old = NULL;
 545                 int save_nr;
 546
 547                 if (ce_stage(ce) || !ce_path_match(ce, pathspec))
 548                         continue;
 549                 if (has_head)
 550                         old = read_one_ent(NULL, head_sha1,
 551                                            ce->name, ce_namelen(ce), 0);
 552                 if (old && ce->ce_mode == old->ce_mode &&
 553                     !hashcmp(ce->sha1, old->sha1)) {
 554                         free(old);
 555                         continue; /* unchanged */
 556                 }
 557                 /* Be careful.  The working tree may not have the
 558                  * path anymore, in which case, under 'allow_remove',
 559                  * or worse yet 'allow_replace', active_nr may decrease.
 560                  */
 561                 save_nr = active_nr;
 562                 update_one(ce->name + prefix_length, prefix, prefix_length);
 563                 if (save_nr != active_nr)
 564                         goto redo;
 565         }
 566         return 0;
 567 }
 568
 569 int cmd_update_index(int argc, const char **argv, const char *prefix)
 570 {
 571         int i, newfd, entries, has_errors = 0, line_termination = '\n';
 572         int allow_options = 1;
 573         int read_from_stdin = 0;
 574         int prefix_length = prefix ? strlen(prefix) : 0;
 575         char set_executable_bit = 0;
 576         unsigned int refresh_flags = 0;
 577         int lock_error = 0;
 578         struct lock_file *lock_file;
 579
 580         git_config(git_default_config, NULL);
 581
 582         /* We can't free this memory, it becomes part of a linked list parsed atexit() */
 583         lock_file = xcalloc(1, sizeof(struct lock_file));
 584
 585         newfd = hold_locked_index(lock_file, 0);
 586         if (newfd < 0)
 587                 lock_error = errno;
 588
 589         entries = read_cache();
 590         if (entries < 0)
 591                 die("cache corrupted");
 592
 593         for (i = 1 ; i < argc; i++) {
 594                 const char *path = argv[i];
 595                 const char *p;
 596
 597                 if (allow_options && *path == '-') {
 598                         if (!strcmp(path, "--")) {
 599                                 allow_options = 0;
 600                                 continue;
 601                         }
 602                         if (!strcmp(path, "-q")) {
 603                                 refresh_flags |= REFRESH_QUIET;
 604                                 continue;
 605                         }
 606                         if (!strcmp(path, "--ignore-submodules")) {
 607                                 refresh_flags |= REFRESH_IGNORE_SUBMODULES;
 608                                 continue;
 609                         }
 610                         if (!strcmp(path, "--add")) {
 611                                 allow_add = 1;
 612                                 continue;
 613                         }
 614                         if (!strcmp(path, "--replace")) {
 615                                 allow_replace = 1;
 616                                 continue;
 617                         }
 618                         if (!strcmp(path, "--remove")) {
 619                                 allow_remove = 1;
 620                                 continue;
 621                         }
 622                         if (!strcmp(path, "--unmerged")) {
 623                                 refresh_flags |= REFRESH_UNMERGED;
 624                                 continue;
 625                         }
 626                         if (!strcmp(path, "--refresh")) {
 627                                 setup_work_tree();
 628                                 has_errors |= refresh_cache(refresh_flags);
 629                                 continue;
 630                         }
 631                         if (!strcmp(path, "--really-refresh")) {
 632                                 setup_work_tree();
 633                                 has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
 634                                 continue;
 635                         }
 636                         if (!strcmp(path, "--cacheinfo")) {
 637                                 unsigned char sha1[20];
 638                                 unsigned int mode;
 639
 640                                 if (i+3 >= argc)
 641                                         die("git update-index: --cacheinfo <mode> <sha1> <path>");
 642
 643                                 if (strtoul_ui(argv[i+1], 8, &mode) ||
 644                                     get_sha1_hex(argv[i+2], sha1) ||
 645                                     add_cacheinfo(mode, sha1, argv[i+3], 0))
 646                                         die("git update-index: --cacheinfo"
 647                                             " cannot add %s", argv[i+3]);
 648                                 i += 3;
 649                                 continue;
 650                         }
 651                         if (!strcmp(path, "--chmod=-x") ||
 652                             !strcmp(path, "--chmod=+x")) {
 653                                 if (argc <= i+1)
 654                                         die("git update-index: %s <path>", path);
 655                                 set_executable_bit = path[8];
 656                                 continue;
 657                         }
 658                         if (!strcmp(path, "--assume-unchanged")) {
 659                                 mark_valid_only = MARK_FLAG;
 660                                 continue;
 661                         }
 662                         if (!strcmp(path, "--no-assume-unchanged")) {
 663                                 mark_valid_only = UNMARK_FLAG;
 664                                 continue;
 665                         }
 666                         if (!strcmp(path, "--no-skip-worktree")) {
 667                                 mark_skip_worktree_only = UNMARK_FLAG;
 668                                 continue;
 669                         }
 670                         if (!strcmp(path, "--skip-worktree")) {
 671                                 mark_skip_worktree_only = MARK_FLAG;
 672                                 continue;
 673                         }
 674                         if (!strcmp(path, "--info-only")) {
 675                                 info_only = 1;
 676                                 continue;
 677                         }
 678                         if (!strcmp(path, "--force-remove")) {
 679                                 force_remove = 1;
 680                                 continue;
 681                         }
 682                         if (!strcmp(path, "-z")) {
 683                                 line_termination = 0;
 684                                 continue;
 685                         }
 686                         if (!strcmp(path, "--stdin")) {
 687                                 if (i != argc - 1)
 688                                         die("--stdin must be at the end");
 689                                 read_from_stdin = 1;
 690                                 break;
 691                         }
 692                         if (!strcmp(path, "--index-info")) {
 693                                 if (i != argc - 1)
 694                                         die("--index-info must be at the end");
 695                                 allow_add = allow_replace = allow_remove = 1;
 696                                 read_index_info(line_termination);
 697                                 break;
 698                         }
 699                         if (!strcmp(path, "--unresolve")) {
 700                                 has_errors = do_unresolve(argc - i, argv + i,
 701                                                           prefix, prefix_length);
 702                                 if (has_errors)
 703                                         active_cache_changed = 0;
 704                                 goto finish;
 705                         }
 706                         if (!strcmp(path, "--again") || !strcmp(path, "-g")) {
 707                                 setup_work_tree();
 708                                 has_errors = do_reupdate(argc - i, argv + i,
 709                                                          prefix, prefix_length);
 710                                 if (has_errors)
 711                                         active_cache_changed = 0;
 712                                 goto finish;
 713                         }
 714                         if (!strcmp(path, "--ignore-missing")) {
 715                                 refresh_flags |= REFRESH_IGNORE_MISSING;
 716                                 continue;
 717                         }
 718                         if (!strcmp(path, "--verbose")) {
 719                                 verbose = 1;
 720                                 continue;
 721                         }
 722                         if (!strcmp(path, "-h") || !strcmp(path, "--help"))
 723                                 usage(update_index_usage);
 724                         die("unknown option %s", path);
 725                 }
 726                 setup_work_tree();
 727                 p = prefix_path(prefix, prefix_length, path);
 728                 update_one(p, NULL, 0);
 729                 if (set_executable_bit)
 730                         chmod_path(set_executable_bit, p);
 731                 if (p < path || p > path + strlen(path))
 732                         free((char *)p);
 733         }
 734         if (read_from_stdin) {
 735                 struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
 736
 737                 setup_work_tree();
 738                 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 739                         const char *p;
 740                         if (line_termination && buf.buf[0] == '"') {
 741                                 strbuf_reset(&nbuf);
 742                                 if (unquote_c_style(&nbuf, buf.buf, NULL))
 743                                         die("line is badly quoted");
 744                                 strbuf_swap(&buf, &nbuf);
 745                         }
 746                         p = prefix_path(prefix, prefix_length, buf.buf);
 747                         update_one(p, NULL, 0);
 748                         if (set_executable_bit)
 749                                 chmod_path(set_executable_bit, p);
 750                         if (p < buf.buf || p > buf.buf + buf.len)
 751                                 free((char *)p);
 752                 }
 753                 strbuf_release(&nbuf);
 754                 strbuf_release(&buf);
 755         }
 756
 757  finish:
 758         if (active_cache_changed) {
 759                 if (newfd < 0) {
 760                         if (refresh_flags & REFRESH_QUIET)
 761                                 exit(128);
 762                         unable_to_lock_index_die(get_index_file(), lock_error);
 763                 }
 764                 if (write_cache(newfd, active_cache, active_nr) ||
 765                     commit_locked_index(lock_file))
 766                         die("Unable to write new index file");
 767         }
 768
 769         rollback_lock_file(lock_file);
 770
 771         return has_errors ? 1 : 0;
 772 }