builtin/ls-files.c

   1 /*
   2  * This merges the file listing in the directory cache index
   3  * with the actual working directory list, and shows different
   4  * combinations of the two.
   5  *
   6  * Copyright (C) Linus Torvalds, 2005
   7  */
   8 #define NO_THE_INDEX_COMPATIBILITY_MACROS
   9 #include "cache.h"
  10 #include "repository.h"
  11 #include "config.h"
  12 #include "quote.h"
  13 #include "dir.h"
  14 #include "builtin.h"
  15 #include "tree.h"
  16 #include "parse-options.h"
  17 #include "resolve-undo.h"
  18 #include "string-list.h"
  19 #include "pathspec.h"
  20 #include "run-command.h"
  21 #include "submodule.h"
  22 #include "submodule-config.h"
  23
  24 static int abbrev;
  25 static int show_deleted;
  26 static int show_cached;
  27 static int show_others;
  28 static int show_stage;
  29 static int show_unmerged;
  30 static int show_resolve_undo;
  31 static int show_modified;
  32 static int show_killed;
  33 static int show_valid_bit;
  34 static int show_fsmonitor_bit;
  35 static int line_terminator = '\n';
  36 static int debug_mode;
  37 static int show_eol;
  38 static int recurse_submodules;
  39
  40 static const char *prefix;
  41 static int max_prefix_len;
  42 static int prefix_len;
  43 static struct pathspec pathspec;
  44 static int error_unmatch;
  45 static char *ps_matched;
  46 static const char *with_tree;
  47 static int exc_given;
  48 static int exclude_args;
  49
  50 static const char *tag_cached = "";
  51 static const char *tag_unmerged = "";
  52 static const char *tag_removed = "";
  53 static const char *tag_other = "";
  54 static const char *tag_killed = "";
  55 static const char *tag_modified = "";
  56 static const char *tag_skip_worktree = "";
  57 static const char *tag_resolve_undo = "";
  58
  59 static void write_eolinfo(const struct index_state *istate,
  60                           const struct cache_entry *ce, const char *path)
  61 {
  62         if (show_eol) {
  63                 struct stat st;
  64                 const char *i_txt = "";
  65                 const char *w_txt = "";
  66                 const char *a_txt = get_convert_attr_ascii(istate, path);
  67                 if (ce && S_ISREG(ce->ce_mode))
  68                         i_txt = get_cached_convert_stats_ascii(istate,
  69                                                                ce->name);
  70                 if (!lstat(path, &st) && S_ISREG(st.st_mode))
  71                         w_txt = get_wt_convert_stats_ascii(path);
  72                 printf("i/%-5s w/%-5s attr/%-17s\t", i_txt, w_txt, a_txt);
  73         }
  74 }
  75
  76 static void write_name(const char *name)
  77 {
  78         /*
  79          * With "--full-name", prefix_len=0; this caller needs to pass
  80          * an empty string in that case (a NULL is good for "").
  81          */
  82         write_name_quoted_relative(name, prefix_len ? prefix : NULL,
  83                                    stdout, line_terminator);
  84 }
  85
  86 static const char *get_tag(const struct cache_entry *ce, const char *tag)
  87 {
  88         static char alttag[4];
  89
  90         if (tag && *tag && ((show_valid_bit && (ce->ce_flags & CE_VALID)) ||
  91                 (show_fsmonitor_bit && (ce->ce_flags & CE_FSMONITOR_VALID)))) {
  92                 memcpy(alttag, tag, 3);
  93
  94                 if (isalpha(tag[0])) {
  95                         alttag[0] = tolower(tag[0]);
  96                 } else if (tag[0] == '?') {
  97                         alttag[0] = '!';
  98                 } else {
  99                         alttag[0] = 'v';
 100                         alttag[1] = tag[0];
 101                         alttag[2] = ' ';
 102                         alttag[3] = 0;
 103                 }
 104
 105                 tag = alttag;
 106         }
 107
 108         return tag;
 109 }
 110
 111 static void print_debug(const struct cache_entry *ce)
 112 {
 113         if (debug_mode) {
 114                 const struct stat_data *sd = &ce->ce_stat_data;
 115
 116                 printf("  ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 117                 printf("  mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 118                 printf("  dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
 119                 printf("  uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
 120                 printf("  size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
 121         }
 122 }
 123
 124 static void show_dir_entry(const struct index_state *istate,
 125                            const char *tag, struct dir_entry *ent)
 126 {
 127         int len = max_prefix_len;
 128
 129         if (len > ent->len)
 130                 die("git ls-files: internal error - directory entry not superset of prefix");
 131
 132         if (!dir_path_match(istate, ent, &pathspec, len, ps_matched))
 133                 return;
 134
 135         fputs(tag, stdout);
 136         write_eolinfo(istate, NULL, ent->name);
 137         write_name(ent->name);
 138 }
 139
 140 static void show_other_files(const struct index_state *istate,
 141                              const struct dir_struct *dir)
 142 {
 143         int i;
 144
 145         for (i = 0; i < dir->nr; i++) {
 146                 struct dir_entry *ent = dir->entries[i];
 147                 if (!index_name_is_other(istate, ent->name, ent->len))
 148                         continue;
 149                 show_dir_entry(istate, tag_other, ent);
 150         }
 151 }
 152
 153 static void show_killed_files(const struct index_state *istate,
 154                               const struct dir_struct *dir)
 155 {
 156         int i;
 157         for (i = 0; i < dir->nr; i++) {
 158                 struct dir_entry *ent = dir->entries[i];
 159                 char *cp, *sp;
 160                 int pos, len, killed = 0;
 161
 162                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 163                         sp = strchr(cp, '/');
 164                         if (!sp) {
 165                                 /* If ent->name is prefix of an entry in the
 166                                  * cache, it will be killed.
 167                                  */
 168                                 pos = index_name_pos(istate, ent->name, ent->len);
 169                                 if (0 <= pos)
 170                                         BUG("killed-file %.*s not found",
 171                                                 ent->len, ent->name);
 172                                 pos = -pos - 1;
 173                                 while (pos < istate->cache_nr &&
 174                                        ce_stage(istate->cache[pos]))
 175                                         pos++; /* skip unmerged */
 176                                 if (istate->cache_nr <= pos)
 177                                         break;
 178                                 /* pos points at a name immediately after
 179                                  * ent->name in the cache.  Does it expect
 180                                  * ent->name to be a directory?
 181                                  */
 182                                 len = ce_namelen(istate->cache[pos]);
 183                                 if ((ent->len < len) &&
 184                                     !strncmp(istate->cache[pos]->name,
 185                                              ent->name, ent->len) &&
 186                                     istate->cache[pos]->name[ent->len] == '/')
 187                                         killed = 1;
 188                                 break;
 189                         }
 190                         if (0 <= index_name_pos(istate, ent->name, sp - ent->name)) {
 191                                 /* If any of the leading directories in
 192                                  * ent->name is registered in the cache,
 193                                  * ent->name will be killed.
 194                                  */
 195                                 killed = 1;
 196                                 break;
 197                         }
 198                 }
 199                 if (killed)
 200                         show_dir_entry(istate, tag_killed, dir->entries[i]);
 201         }
 202 }
 203
 204 static void show_files(struct repository *repo, struct dir_struct *dir);
 205
 206 static void show_submodule(struct repository *superproject,
 207                            struct dir_struct *dir, const char *path)
 208 {
 209         struct repository submodule;
 210
 211         if (repo_submodule_init(&submodule, superproject, path))
 212                 return;
 213
 214         if (repo_read_index(&submodule) < 0)
 215                 die("index file corrupt");
 216
 217         show_files(&submodule, dir);
 218
 219         repo_clear(&submodule);
 220 }
 221
 222 static void show_ce(struct repository *repo, struct dir_struct *dir,
 223                     const struct cache_entry *ce, const char *fullname,
 224                     const char *tag)
 225 {
 226         if (max_prefix_len > strlen(fullname))
 227                 die("git ls-files: internal error - cache entry not superset of prefix");
 228
 229         if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 230             is_submodule_active(repo, ce->name)) {
 231                 show_submodule(repo, dir, ce->name);
 232         } else if (match_pathspec(repo->index, &pathspec, fullname, strlen(fullname),
 233                                   max_prefix_len, ps_matched,
 234                                   S_ISDIR(ce->ce_mode) ||
 235                                   S_ISGITLINK(ce->ce_mode))) {
 236                 tag = get_tag(ce, tag);
 237
 238                 if (!show_stage) {
 239                         fputs(tag, stdout);
 240                 } else {
 241                         printf("%s%06o %s %d\t",
 242                                tag,
 243                                ce->ce_mode,
 244                                find_unique_abbrev(&ce->oid, abbrev),
 245                                ce_stage(ce));
 246                 }
 247                 write_eolinfo(repo->index, ce, fullname);
 248                 write_name(fullname);
 249                 print_debug(ce);
 250         }
 251 }
 252
 253 static void show_ru_info(const struct index_state *istate)
 254 {
 255         struct string_list_item *item;
 256
 257         if (!istate->resolve_undo)
 258                 return;
 259
 260         for_each_string_list_item(item, istate->resolve_undo) {
 261                 const char *path = item->string;
 262                 struct resolve_undo_info *ui = item->util;
 263                 int i, len;
 264
 265                 len = strlen(path);
 266                 if (len < max_prefix_len)
 267                         continue; /* outside of the prefix */
 268                 if (!match_pathspec(istate, &pathspec, path, len,
 269                                     max_prefix_len, ps_matched, 0))
 270                         continue; /* uninterested */
 271                 for (i = 0; i < 3; i++) {
 272                         if (!ui->mode[i])
 273                                 continue;
 274                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 275                                find_unique_abbrev(&ui->oid[i], abbrev),
 276                                i + 1);
 277                         write_name(path);
 278                 }
 279         }
 280 }
 281
 282 static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
 283                        const char *fullname, const struct cache_entry *ce)
 284 {
 285         int dtype = ce_to_dtype(ce);
 286         return is_excluded(dir, istate, fullname, &dtype);
 287 }
 288
 289 static void construct_fullname(struct strbuf *out, const struct repository *repo,
 290                                const struct cache_entry *ce)
 291 {
 292         strbuf_reset(out);
 293         if (repo->submodule_prefix)
 294                 strbuf_addstr(out, repo->submodule_prefix);
 295         strbuf_addstr(out, ce->name);
 296 }
 297
 298 static void show_files(struct repository *repo, struct dir_struct *dir)
 299 {
 300         int i;
 301         struct strbuf fullname = STRBUF_INIT;
 302
 303         /* For cached/deleted files we don't need to even do the readdir */
 304         if (show_others || show_killed) {
 305                 if (!show_others)
 306                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 307                 fill_directory(dir, repo->index, &pathspec);
 308                 if (show_others)
 309                         show_other_files(repo->index, dir);
 310                 if (show_killed)
 311                         show_killed_files(repo->index, dir);
 312         }
 313         if (show_cached || show_stage) {
 314                 for (i = 0; i < repo->index->cache_nr; i++) {
 315                         const struct cache_entry *ce = repo->index->cache[i];
 316
 317                         construct_fullname(&fullname, repo, ce);
 318
 319                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 320                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 321                                 continue;
 322                         if (show_unmerged && !ce_stage(ce))
 323                                 continue;
 324                         if (ce->ce_flags & CE_UPDATE)
 325                                 continue;
 326                         show_ce(repo, dir, ce, fullname.buf,
 327                                 ce_stage(ce) ? tag_unmerged :
 328                                 (ce_skip_worktree(ce) ? tag_skip_worktree :
 329                                  tag_cached));
 330                 }
 331         }
 332         if (show_deleted || show_modified) {
 333                 for (i = 0; i < repo->index->cache_nr; i++) {
 334                         const struct cache_entry *ce = repo->index->cache[i];
 335                         struct stat st;
 336                         int err;
 337
 338                         construct_fullname(&fullname, repo, ce);
 339
 340                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 341                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 342                                 continue;
 343                         if (ce->ce_flags & CE_UPDATE)
 344                                 continue;
 345                         if (ce_skip_worktree(ce))
 346                                 continue;
 347                         err = lstat(fullname.buf, &st);
 348                         if (show_deleted && err)
 349                                 show_ce(repo, dir, ce, fullname.buf, tag_removed);
 350                         if (show_modified && ie_modified(repo->index, ce, &st, 0))
 351                                 show_ce(repo, dir, ce, fullname.buf, tag_modified);
 352                 }
 353         }
 354
 355         strbuf_release(&fullname);
 356 }
 357
 358 /*
 359  * Prune the index to only contain stuff starting with "prefix"
 360  */
 361 static void prune_index(struct index_state *istate,
 362                         const char *prefix, size_t prefixlen)
 363 {
 364         int pos;
 365         unsigned int first, last;
 366
 367         if (!prefix || !istate->cache_nr)
 368                 return;
 369         pos = index_name_pos(istate, prefix, prefixlen);
 370         if (pos < 0)
 371                 pos = -pos-1;
 372         first = pos;
 373         last = istate->cache_nr;
 374         while (last > first) {
 375                 int next = (last + first) >> 1;
 376                 const struct cache_entry *ce = istate->cache[next];
 377                 if (!strncmp(ce->name, prefix, prefixlen)) {
 378                         first = next+1;
 379                         continue;
 380                 }
 381                 last = next;
 382         }
 383         MOVE_ARRAY(istate->cache, istate->cache + pos, last - pos);
 384         istate->cache_nr = last - pos;
 385 }
 386
 387 static int get_common_prefix_len(const char *common_prefix)
 388 {
 389         int common_prefix_len;
 390
 391         if (!common_prefix)
 392                 return 0;
 393
 394         common_prefix_len = strlen(common_prefix);
 395
 396         /*
 397          * If the prefix has a trailing slash, strip it so that submodules wont
 398          * be pruned from the index.
 399          */
 400         if (common_prefix[common_prefix_len - 1] == '/')
 401                 common_prefix_len--;
 402
 403         return common_prefix_len;
 404 }
 405
 406 /*
 407  * Read the tree specified with --with-tree option
 408  * (typically, HEAD) into stage #1 and then
 409  * squash them down to stage #0.  This is used for
 410  * --error-unmatch to list and check the path patterns
 411  * that were given from the command line.  We are not
 412  * going to write this index out.
 413  */
 414 void overlay_tree_on_index(struct index_state *istate,
 415                            const char *tree_name, const char *prefix)
 416 {
 417         struct tree *tree;
 418         struct object_id oid;
 419         struct pathspec pathspec;
 420         struct cache_entry *last_stage0 = NULL;
 421         int i;
 422
 423         if (get_oid(tree_name, &oid))
 424                 die("tree-ish %s not found.", tree_name);
 425         tree = parse_tree_indirect(&oid);
 426         if (!tree)
 427                 die("bad tree-ish %s", tree_name);
 428
 429         /* Hoist the unmerged entries up to stage #3 to make room */
 430         for (i = 0; i < istate->cache_nr; i++) {
 431                 struct cache_entry *ce = istate->cache[i];
 432                 if (!ce_stage(ce))
 433                         continue;
 434                 ce->ce_flags |= CE_STAGEMASK;
 435         }
 436
 437         if (prefix) {
 438                 static const char *(matchbuf[1]);
 439                 matchbuf[0] = NULL;
 440                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 441                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 442         } else
 443                 memset(&pathspec, 0, sizeof(pathspec));
 444         if (read_tree(the_repository, tree, 1, &pathspec, istate))
 445                 die("unable to read tree entries %s", tree_name);
 446
 447         for (i = 0; i < istate->cache_nr; i++) {
 448                 struct cache_entry *ce = istate->cache[i];
 449                 switch (ce_stage(ce)) {
 450                 case 0:
 451                         last_stage0 = ce;
 452                         /* fallthru */
 453                 default:
 454                         continue;
 455                 case 1:
 456                         /*
 457                          * If there is stage #0 entry for this, we do not
 458                          * need to show it.  We use CE_UPDATE bit to mark
 459                          * such an entry.
 460                          */
 461                         if (last_stage0 &&
 462                             !strcmp(last_stage0->name, ce->name))
 463                                 ce->ce_flags |= CE_UPDATE;
 464                 }
 465         }
 466 }
 467
 468 static const char * const ls_files_usage[] = {
 469         N_("git ls-files [<options>] [<file>...]"),
 470         NULL
 471 };
 472
 473 static int option_parse_exclude(const struct option *opt,
 474                                 const char *arg, int unset)
 475 {
 476         struct string_list *exclude_list = opt->value;
 477
 478         BUG_ON_OPT_NEG(unset);
 479
 480         exc_given = 1;
 481         string_list_append(exclude_list, arg);
 482
 483         return 0;
 484 }
 485
 486 static int option_parse_exclude_from(const struct option *opt,
 487                                      const char *arg, int unset)
 488 {
 489         struct dir_struct *dir = opt->value;
 490
 491         BUG_ON_OPT_NEG(unset);
 492
 493         exc_given = 1;
 494         add_excludes_from_file(dir, arg);
 495
 496         return 0;
 497 }
 498
 499 static int option_parse_exclude_standard(const struct option *opt,
 500                                          const char *arg, int unset)
 501 {
 502         struct dir_struct *dir = opt->value;
 503
 504         BUG_ON_OPT_NEG(unset);
 505         BUG_ON_OPT_ARG(arg);
 506
 507         exc_given = 1;
 508         setup_standard_excludes(dir);
 509
 510         return 0;
 511 }
 512
 513 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 514 {
 515         int require_work_tree = 0, show_tag = 0, i;
 516         const char *max_prefix;
 517         struct dir_struct dir;
 518         struct exclude_list *el;
 519         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 520         struct option builtin_ls_files_options[] = {
 521                 /* Think twice before adding "--nul" synonym to this */
 522                 OPT_SET_INT('z', NULL, &line_terminator,
 523                         N_("paths are separated with NUL character"), '\0'),
 524                 OPT_BOOL('t', NULL, &show_tag,
 525                         N_("identify the file status with tags")),
 526                 OPT_BOOL('v', NULL, &show_valid_bit,
 527                         N_("use lowercase letters for 'assume unchanged' files")),
 528                 OPT_BOOL('f', NULL, &show_fsmonitor_bit,
 529                         N_("use lowercase letters for 'fsmonitor clean' files")),
 530                 OPT_BOOL('c', "cached", &show_cached,
 531                         N_("show cached files in the output (default)")),
 532                 OPT_BOOL('d', "deleted", &show_deleted,
 533                         N_("show deleted files in the output")),
 534                 OPT_BOOL('m', "modified", &show_modified,
 535                         N_("show modified files in the output")),
 536                 OPT_BOOL('o', "others", &show_others,
 537                         N_("show other files in the output")),
 538                 OPT_BIT('i', "ignored", &dir.flags,
 539                         N_("show ignored files in the output"),
 540                         DIR_SHOW_IGNORED),
 541                 OPT_BOOL('s', "stage", &show_stage,
 542                         N_("show staged contents' object name in the output")),
 543                 OPT_BOOL('k', "killed", &show_killed,
 544                         N_("show files on the filesystem that need to be removed")),
 545                 OPT_BIT(0, "directory", &dir.flags,
 546                         N_("show 'other' directories' names only"),
 547                         DIR_SHOW_OTHER_DIRECTORIES),
 548                 OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 549                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 550                         N_("don't show empty directories"),
 551                         DIR_HIDE_EMPTY_DIRECTORIES),
 552                 OPT_BOOL('u', "unmerged", &show_unmerged,
 553                         N_("show unmerged files in the output")),
 554                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 555                             N_("show resolve-undo information")),
 556                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 557                         N_("skip files matching pattern"),
 558                         PARSE_OPT_NONEG, option_parse_exclude },
 559                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 560                         N_("exclude patterns are read from <file>"),
 561                         PARSE_OPT_NONEG, option_parse_exclude_from },
 562                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 563                         N_("read additional per-directory exclude patterns in <file>")),
 564                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 565                         N_("add the standard git exclusions"),
 566                         PARSE_OPT_NOARG | PARSE_OPT_NONEG,
 567                         option_parse_exclude_standard },
 568                 OPT_SET_INT_F(0, "full-name", &prefix_len,
 569                               N_("make the output relative to the project top directory"),
 570                               0, PARSE_OPT_NONEG),
 571                 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 572                         N_("recurse through submodules")),
 573                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 574                         N_("if any <file> is not in the index, treat this as an error")),
 575                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 576                         N_("pretend that paths removed since <tree-ish> are still present")),
 577                 OPT__ABBREV(&abbrev),
 578                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 579                 OPT_END()
 580         };
 581
 582         if (argc == 2 && !strcmp(argv[1], "-h"))
 583                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 584
 585         memset(&dir, 0, sizeof(dir));
 586         prefix = cmd_prefix;
 587         if (prefix)
 588                 prefix_len = strlen(prefix);
 589         git_config(git_default_config, NULL);
 590
 591         if (repo_read_index(the_repository) < 0)
 592                 die("index file corrupt");
 593
 594         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 595                         ls_files_usage, 0);
 596         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 597         for (i = 0; i < exclude_list.nr; i++) {
 598                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 599         }
 600         if (show_tag || show_valid_bit || show_fsmonitor_bit) {
 601                 tag_cached = "H ";
 602                 tag_unmerged = "M ";
 603                 tag_removed = "R ";
 604                 tag_modified = "C ";
 605                 tag_other = "? ";
 606                 tag_killed = "K ";
 607                 tag_skip_worktree = "S ";
 608                 tag_resolve_undo = "U ";
 609         }
 610         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 611                 require_work_tree = 1;
 612         if (show_unmerged)
 613                 /*
 614                  * There's no point in showing unmerged unless
 615                  * you also show the stage information.
 616                  */
 617                 show_stage = 1;
 618         if (dir.exclude_per_dir)
 619                 exc_given = 1;
 620
 621         if (require_work_tree && !is_inside_work_tree())
 622                 setup_work_tree();
 623
 624         if (recurse_submodules &&
 625             (show_stage || show_deleted || show_others || show_unmerged ||
 626              show_killed || show_modified || show_resolve_undo || with_tree))
 627                 die("ls-files --recurse-submodules unsupported mode");
 628
 629         if (recurse_submodules && error_unmatch)
 630                 die("ls-files --recurse-submodules does not support "
 631                     "--error-unmatch");
 632
 633         parse_pathspec(&pathspec, 0,
 634                        PATHSPEC_PREFER_CWD,
 635                        prefix, argv);
 636
 637         /*
 638          * Find common prefix for all pathspec's
 639          * This is used as a performance optimization which unfortunately cannot
 640          * be done when recursing into submodules because when a pathspec is
 641          * given which spans repository boundaries you can't simply remove the
 642          * submodule entry because the pathspec may match something inside the
 643          * submodule.
 644          */
 645         if (recurse_submodules)
 646                 max_prefix = NULL;
 647         else
 648                 max_prefix = common_prefix(&pathspec);
 649         max_prefix_len = get_common_prefix_len(max_prefix);
 650
 651         prune_index(the_repository->index, max_prefix, max_prefix_len);
 652
 653         /* Treat unmatching pathspec elements as errors */
 654         if (pathspec.nr && error_unmatch)
 655                 ps_matched = xcalloc(pathspec.nr, 1);
 656
 657         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 658                 die("ls-files --ignored needs some exclude pattern");
 659
 660         /* With no flags, we default to showing the cached files */
 661         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 662               show_killed || show_modified || show_resolve_undo))
 663                 show_cached = 1;
 664
 665         if (with_tree) {
 666                 /*
 667                  * Basic sanity check; show-stages and show-unmerged
 668                  * would not make any sense with this option.
 669                  */
 670                 if (show_stage || show_unmerged)
 671                         die("ls-files --with-tree is incompatible with -s or -u");
 672                 overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
 673         }
 674
 675         show_files(the_repository, &dir);
 676
 677         if (show_resolve_undo)
 678                 show_ru_info(the_repository->index);
 679
 680         if (ps_matched) {
 681                 int bad;
 682                 bad = report_path_error(ps_matched, &pathspec, prefix);
 683                 if (bad)
 684                         fprintf(stderr, "Did you forget to 'git add'?\n");
 685
 686                 return bad ? 1 : 0;
 687         }
 688
 689         UNLEAK(dir);
 690         return 0;
 691 }