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