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