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 #include "cache.h"
   9 #include "repository.h"
  10 #include "config.h"
  11 #include "quote.h"
  12 #include "dir.h"
  13 #include "builtin.h"
  14 #include "tree.h"
  15 #include "parse-options.h"
  16 #include "resolve-undo.h"
  17 #include "string-list.h"
  18 #include "pathspec.h"
  19 #include "run-command.h"
  20 #include "submodule.h"
  21 #include "submodule-config.h"
  22
  23 static int abbrev;
  24 static int show_deleted;
  25 static int show_cached;
  26 static int show_others;
  27 static int show_stage;
  28 static int show_unmerged;
  29 static int show_resolve_undo;
  30 static int show_modified;
  31 static int show_killed;
  32 static int show_valid_bit;
  33 static int show_fsmonitor_bit;
  34 static int line_terminator = '\n';
  35 static int debug_mode;
  36 static int show_eol;
  37 static int recurse_submodules;
  38
  39 static const char *prefix;
  40 static int max_prefix_len;
  41 static int prefix_len;
  42 static struct pathspec pathspec;
  43 static int error_unmatch;
  44 static char *ps_matched;
  45 static const char *with_tree;
  46 static int exc_given;
  47 static int exclude_args;
  48
  49 static const char *tag_cached = "";
  50 static const char *tag_unmerged = "";
  51 static const char *tag_removed = "";
  52 static const char *tag_other = "";
  53 static const char *tag_killed = "";
  54 static const char *tag_modified = "";
  55 static const char *tag_skip_worktree = "";
  56 static const char *tag_resolve_undo = "";
  57
  58 static void write_eolinfo(const struct index_state *istate,
  59                           const struct cache_entry *ce, const char *path)
  60 {
  61         if (show_eol) {
  62                 struct stat st;
  63                 const char *i_txt = "";
  64                 const char *w_txt = "";
  65                 const char *a_txt = get_convert_attr_ascii(istate, path);
  66                 if (ce && S_ISREG(ce->ce_mode))
  67                         i_txt = get_cached_convert_stats_ascii(istate,
  68                                                                ce->name);
  69                 if (!lstat(path, &st) && S_ISREG(st.st_mode))
  70                         w_txt = get_wt_convert_stats_ascii(path);
  71                 printf("i/%-5s w/%-5s attr/%-17s\t", i_txt, w_txt, a_txt);
  72         }
  73 }
  74
  75 static void write_name(const char *name)
  76 {
  77         /*
  78          * With "--full-name", prefix_len=0; this caller needs to pass
  79          * an empty string in that case (a NULL is good for "").
  80          */
  81         write_name_quoted_relative(name, prefix_len ? prefix : NULL,
  82                                    stdout, line_terminator);
  83 }
  84
  85 static const char *get_tag(const struct cache_entry *ce, const char *tag)
  86 {
  87         static char alttag[4];
  88
  89         if (tag && *tag && ((show_valid_bit && (ce->ce_flags & CE_VALID)) ||
  90                 (show_fsmonitor_bit && (ce->ce_flags & CE_FSMONITOR_VALID)))) {
  91                 memcpy(alttag, tag, 3);
  92
  93                 if (isalpha(tag[0])) {
  94                         alttag[0] = tolower(tag[0]);
  95                 } else if (tag[0] == '?') {
  96                         alttag[0] = '!';
  97                 } else {
  98                         alttag[0] = 'v';
  99                         alttag[1] = tag[0];
 100                         alttag[2] = ' ';
 101                         alttag[3] = 0;
 102                 }
 103
 104                 tag = alttag;
 105         }
 106
 107         return tag;
 108 }
 109
 110 static void print_debug(const struct cache_entry *ce)
 111 {
 112         if (debug_mode) {
 113                 const struct stat_data *sd = &ce->ce_stat_data;
 114
 115                 printf("  ctime: %u:%u\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 116                 printf("  mtime: %u:%u\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 117                 printf("  dev: %u\tino: %u\n", sd->sd_dev, sd->sd_ino);
 118                 printf("  uid: %u\tgid: %u\n", sd->sd_uid, sd->sd_gid);
 119                 printf("  size: %u\tflags: %x\n", sd->sd_size, ce->ce_flags);
 120         }
 121 }
 122
 123 static void show_dir_entry(const struct index_state *istate,
 124                            const char *tag, struct dir_entry *ent)
 125 {
 126         int len = max_prefix_len;
 127
 128         if (len > ent->len)
 129                 die("git ls-files: internal error - directory entry not superset of prefix");
 130
 131         if (!dir_path_match(istate, ent, &pathspec, len, ps_matched))
 132                 return;
 133
 134         fputs(tag, stdout);
 135         write_eolinfo(istate, NULL, ent->name);
 136         write_name(ent->name);
 137 }
 138
 139 static void show_other_files(const struct index_state *istate,
 140                              const struct dir_struct *dir)
 141 {
 142         int i;
 143
 144         for (i = 0; i < dir->nr; i++) {
 145                 struct dir_entry *ent = dir->entries[i];
 146                 if (!index_name_is_other(istate, ent->name, ent->len))
 147                         continue;
 148                 show_dir_entry(istate, tag_other, ent);
 149         }
 150 }
 151
 152 static void show_killed_files(const struct index_state *istate,
 153                               const struct dir_struct *dir)
 154 {
 155         int i;
 156         for (i = 0; i < dir->nr; i++) {
 157                 struct dir_entry *ent = dir->entries[i];
 158                 char *cp, *sp;
 159                 int pos, len, killed = 0;
 160
 161                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 162                         sp = strchr(cp, '/');
 163                         if (!sp) {
 164                                 /* If ent->name is prefix of an entry in the
 165                                  * cache, it will be killed.
 166                                  */
 167                                 pos = index_name_pos(istate, ent->name, ent->len);
 168                                 if (0 <= pos)
 169                                         BUG("killed-file %.*s not found",
 170                                                 ent->len, ent->name);
 171                                 pos = -pos - 1;
 172                                 while (pos < istate->cache_nr &&
 173                                        ce_stage(istate->cache[pos]))
 174                                         pos++; /* skip unmerged */
 175                                 if (istate->cache_nr <= pos)
 176                                         break;
 177                                 /* pos points at a name immediately after
 178                                  * ent->name in the cache.  Does it expect
 179                                  * ent->name to be a directory?
 180                                  */
 181                                 len = ce_namelen(istate->cache[pos]);
 182                                 if ((ent->len < len) &&
 183                                     !strncmp(istate->cache[pos]->name,
 184                                              ent->name, ent->len) &&
 185                                     istate->cache[pos]->name[ent->len] == '/')
 186                                         killed = 1;
 187                                 break;
 188                         }
 189                         if (0 <= index_name_pos(istate, ent->name, sp - ent->name)) {
 190                                 /* If any of the leading directories in
 191                                  * ent->name is registered in the cache,
 192                                  * ent->name will be killed.
 193                                  */
 194                                 killed = 1;
 195                                 break;
 196                         }
 197                 }
 198                 if (killed)
 199                         show_dir_entry(istate, tag_killed, dir->entries[i]);
 200         }
 201 }
 202
 203 static void show_files(struct repository *repo, struct dir_struct *dir);
 204
 205 static void show_submodule(struct repository *superproject,
 206                            struct dir_struct *dir, const char *path)
 207 {
 208         struct repository subrepo;
 209         const struct submodule *sub = submodule_from_path(superproject,
 210                                                           &null_oid, path);
 211
 212         if (repo_submodule_init(&subrepo, superproject, sub))
 213                 return;
 214
 215         if (repo_read_index(&subrepo) < 0)
 216                 die("index file corrupt");
 217
 218         show_files(&subrepo, dir);
 219
 220         repo_clear(&subrepo);
 221 }
 222
 223 static void show_ce(struct repository *repo, struct dir_struct *dir,
 224                     const struct cache_entry *ce, const char *fullname,
 225                     const char *tag)
 226 {
 227         if (max_prefix_len > strlen(fullname))
 228                 die("git ls-files: internal error - cache entry not superset of prefix");
 229
 230         if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 231             is_submodule_active(repo, ce->name)) {
 232                 show_submodule(repo, dir, ce->name);
 233         } else if (match_pathspec(repo->index, &pathspec, fullname, strlen(fullname),
 234                                   max_prefix_len, ps_matched,
 235                                   S_ISDIR(ce->ce_mode) ||
 236                                   S_ISGITLINK(ce->ce_mode))) {
 237                 tag = get_tag(ce, tag);
 238
 239                 if (!show_stage) {
 240                         fputs(tag, stdout);
 241                 } else {
 242                         printf("%s%06o %s %d\t",
 243                                tag,
 244                                ce->ce_mode,
 245                                find_unique_abbrev(&ce->oid, abbrev),
 246                                ce_stage(ce));
 247                 }
 248                 write_eolinfo(repo->index, ce, fullname);
 249                 write_name(fullname);
 250                 print_debug(ce);
 251         }
 252 }
 253
 254 static void show_ru_info(const struct index_state *istate)
 255 {
 256         struct string_list_item *item;
 257
 258         if (!istate->resolve_undo)
 259                 return;
 260
 261         for_each_string_list_item(item, istate->resolve_undo) {
 262                 const char *path = item->string;
 263                 struct resolve_undo_info *ui = item->util;
 264                 int i, len;
 265
 266                 len = strlen(path);
 267                 if (len < max_prefix_len)
 268                         continue; /* outside of the prefix */
 269                 if (!match_pathspec(istate, &pathspec, path, len,
 270                                     max_prefix_len, ps_matched, 0))
 271                         continue; /* uninterested */
 272                 for (i = 0; i < 3; i++) {
 273                         if (!ui->mode[i])
 274                                 continue;
 275                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 276                                find_unique_abbrev(&ui->oid[i], abbrev),
 277                                i + 1);
 278                         write_name(path);
 279                 }
 280         }
 281 }
 282
 283 static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
 284                        const char *fullname, const struct cache_entry *ce)
 285 {
 286         int dtype = ce_to_dtype(ce);
 287         return is_excluded(dir, istate, fullname, &dtype);
 288 }
 289
 290 static void construct_fullname(struct strbuf *out, const struct repository *repo,
 291                                const struct cache_entry *ce)
 292 {
 293         strbuf_reset(out);
 294         if (repo->submodule_prefix)
 295                 strbuf_addstr(out, repo->submodule_prefix);
 296         strbuf_addstr(out, ce->name);
 297 }
 298
 299 static void show_files(struct repository *repo, struct dir_struct *dir)
 300 {
 301         int i;
 302         struct strbuf fullname = STRBUF_INIT;
 303
 304         /* For cached/deleted files we don't need to even do the readdir */
 305         if (show_others || show_killed) {
 306                 if (!show_others)
 307                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 308                 fill_directory(dir, repo->index, &pathspec);
 309                 if (show_others)
 310                         show_other_files(repo->index, dir);
 311                 if (show_killed)
 312                         show_killed_files(repo->index, dir);
 313         }
 314         if (show_cached || show_stage) {
 315                 for (i = 0; i < repo->index->cache_nr; i++) {
 316                         const struct cache_entry *ce = repo->index->cache[i];
 317
 318                         construct_fullname(&fullname, repo, ce);
 319
 320                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 321                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 322                                 continue;
 323                         if (show_unmerged && !ce_stage(ce))
 324                                 continue;
 325                         if (ce->ce_flags & CE_UPDATE)
 326                                 continue;
 327                         show_ce(repo, dir, ce, fullname.buf,
 328                                 ce_stage(ce) ? tag_unmerged :
 329                                 (ce_skip_worktree(ce) ? tag_skip_worktree :
 330                                  tag_cached));
 331                 }
 332         }
 333         if (show_deleted || show_modified) {
 334                 for (i = 0; i < repo->index->cache_nr; i++) {
 335                         const struct cache_entry *ce = repo->index->cache[i];
 336                         struct stat st;
 337                         int err;
 338
 339                         construct_fullname(&fullname, repo, ce);
 340
 341                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 342                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 343                                 continue;
 344                         if (ce->ce_flags & CE_UPDATE)
 345                                 continue;
 346                         if (ce_skip_worktree(ce))
 347                                 continue;
 348                         err = lstat(fullname.buf, &st);
 349                         if (show_deleted && err)
 350                                 show_ce(repo, dir, ce, fullname.buf, tag_removed);
 351                         if (show_modified && ie_modified(repo->index, ce, &st, 0))
 352                                 show_ce(repo, dir, ce, fullname.buf, tag_modified);
 353                 }
 354         }
 355
 356         strbuf_release(&fullname);
 357 }
 358
 359 /*
 360  * Prune the index to only contain stuff starting with "prefix"
 361  */
 362 static void prune_index(struct index_state *istate,
 363                         const char *prefix, size_t prefixlen)
 364 {
 365         int pos;
 366         unsigned int first, last;
 367
 368         if (!prefix || !istate->cache_nr)
 369                 return;
 370         pos = index_name_pos(istate, prefix, prefixlen);
 371         if (pos < 0)
 372                 pos = -pos-1;
 373         first = pos;
 374         last = istate->cache_nr;
 375         while (last > first) {
 376                 int next = (last + first) >> 1;
 377                 const struct cache_entry *ce = istate->cache[next];
 378                 if (!strncmp(ce->name, prefix, prefixlen)) {
 379                         first = next+1;
 380                         continue;
 381                 }
 382                 last = next;
 383         }
 384         MOVE_ARRAY(istate->cache, istate->cache + pos, last - pos);
 385         istate->cache_nr = last - pos;
 386 }
 387
 388 static int get_common_prefix_len(const char *common_prefix)
 389 {
 390         int common_prefix_len;
 391
 392         if (!common_prefix)
 393                 return 0;
 394
 395         common_prefix_len = strlen(common_prefix);
 396
 397         /*
 398          * If the prefix has a trailing slash, strip it so that submodules wont
 399          * be pruned from the index.
 400          */
 401         if (common_prefix[common_prefix_len - 1] == '/')
 402                 common_prefix_len--;
 403
 404         return common_prefix_len;
 405 }
 406
 407 /*
 408  * Read the tree specified with --with-tree option
 409  * (typically, HEAD) into stage #1 and then
 410  * squash them down to stage #0.  This is used for
 411  * --error-unmatch to list and check the path patterns
 412  * that were given from the command line.  We are not
 413  * going to write this index out.
 414  */
 415 void overlay_tree_on_index(struct index_state *istate,
 416                            const char *tree_name, const char *prefix)
 417 {
 418         struct tree *tree;
 419         struct object_id oid;
 420         struct pathspec pathspec;
 421         struct cache_entry *last_stage0 = NULL;
 422         int i;
 423
 424         if (get_oid(tree_name, &oid))
 425                 die("tree-ish %s not found.", tree_name);
 426         tree = parse_tree_indirect(&oid);
 427         if (!tree)
 428                 die("bad tree-ish %s", tree_name);
 429
 430         /* Hoist the unmerged entries up to stage #3 to make room */
 431         for (i = 0; i < istate->cache_nr; i++) {
 432                 struct cache_entry *ce = istate->cache[i];
 433                 if (!ce_stage(ce))
 434                         continue;
 435                 ce->ce_flags |= CE_STAGEMASK;
 436         }
 437
 438         if (prefix) {
 439                 static const char *(matchbuf[1]);
 440                 matchbuf[0] = NULL;
 441                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 442                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 443         } else
 444                 memset(&pathspec, 0, sizeof(pathspec));
 445         if (read_tree(the_repository, tree, 1, &pathspec, istate))
 446                 die("unable to read tree entries %s", tree_name);
 447
 448         for (i = 0; i < istate->cache_nr; i++) {
 449                 struct cache_entry *ce = istate->cache[i];
 450                 switch (ce_stage(ce)) {
 451                 case 0:
 452                         last_stage0 = ce;
 453                         /* fallthru */
 454                 default:
 455                         continue;
 456                 case 1:
 457                         /*
 458                          * If there is stage #0 entry for this, we do not
 459                          * need to show it.  We use CE_UPDATE bit to mark
 460                          * such an entry.
 461                          */
 462                         if (last_stage0 &&
 463                             !strcmp(last_stage0->name, ce->name))
 464                                 ce->ce_flags |= CE_UPDATE;
 465                 }
 466         }
 467 }
 468
 469 static const char * const ls_files_usage[] = {
 470         N_("git ls-files [<options>] [<file>...]"),
 471         NULL
 472 };
 473
 474 static int option_parse_exclude(const struct option *opt,
 475                                 const char *arg, int unset)
 476 {
 477         struct string_list *exclude_list = opt->value;
 478
 479         BUG_ON_OPT_NEG(unset);
 480
 481         exc_given = 1;
 482         string_list_append(exclude_list, arg);
 483
 484         return 0;
 485 }
 486
 487 static int option_parse_exclude_from(const struct option *opt,
 488                                      const char *arg, int unset)
 489 {
 490         struct dir_struct *dir = opt->value;
 491
 492         BUG_ON_OPT_NEG(unset);
 493
 494         exc_given = 1;
 495         add_excludes_from_file(dir, arg);
 496
 497         return 0;
 498 }
 499
 500 static int option_parse_exclude_standard(const struct option *opt,
 501                                          const char *arg, int unset)
 502 {
 503         struct dir_struct *dir = opt->value;
 504
 505         BUG_ON_OPT_NEG(unset);
 506         BUG_ON_OPT_ARG(arg);
 507
 508         exc_given = 1;
 509         setup_standard_excludes(dir);
 510
 511         return 0;
 512 }
 513
 514 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 515 {
 516         int require_work_tree = 0, show_tag = 0, i;
 517         const char *max_prefix;
 518         struct dir_struct dir;
 519         struct exclude_list *el;
 520         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 521         struct option builtin_ls_files_options[] = {
 522                 /* Think twice before adding "--nul" synonym to this */
 523                 OPT_SET_INT('z', NULL, &line_terminator,
 524                         N_("paths are separated with NUL character"), '\0'),
 525                 OPT_BOOL('t', NULL, &show_tag,
 526                         N_("identify the file status with tags")),
 527                 OPT_BOOL('v', NULL, &show_valid_bit,
 528                         N_("use lowercase letters for 'assume unchanged' files")),
 529                 OPT_BOOL('f', NULL, &show_fsmonitor_bit,
 530                         N_("use lowercase letters for 'fsmonitor clean' files")),
 531                 OPT_BOOL('c', "cached", &show_cached,
 532                         N_("show cached files in the output (default)")),
 533                 OPT_BOOL('d', "deleted", &show_deleted,
 534                         N_("show deleted files in the output")),
 535                 OPT_BOOL('m', "modified", &show_modified,
 536                         N_("show modified files in the output")),
 537                 OPT_BOOL('o', "others", &show_others,
 538                         N_("show other files in the output")),
 539                 OPT_BIT('i', "ignored", &dir.flags,
 540                         N_("show ignored files in the output"),
 541                         DIR_SHOW_IGNORED),
 542                 OPT_BOOL('s', "stage", &show_stage,
 543                         N_("show staged contents' object name in the output")),
 544                 OPT_BOOL('k', "killed", &show_killed,
 545                         N_("show files on the filesystem that need to be removed")),
 546                 OPT_BIT(0, "directory", &dir.flags,
 547                         N_("show 'other' directories' names only"),
 548                         DIR_SHOW_OTHER_DIRECTORIES),
 549                 OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 550                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 551                         N_("don't show empty directories"),
 552                         DIR_HIDE_EMPTY_DIRECTORIES),
 553                 OPT_BOOL('u', "unmerged", &show_unmerged,
 554                         N_("show unmerged files in the output")),
 555                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 556                             N_("show resolve-undo information")),
 557                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 558                         N_("skip files matching pattern"),
 559                         PARSE_OPT_NONEG, option_parse_exclude },
 560                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 561                         N_("exclude patterns are read from <file>"),
 562                         PARSE_OPT_NONEG, option_parse_exclude_from },
 563                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 564                         N_("read additional per-directory exclude patterns in <file>")),
 565                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 566                         N_("add the standard git exclusions"),
 567                         PARSE_OPT_NOARG | PARSE_OPT_NONEG,
 568                         option_parse_exclude_standard },
 569                 OPT_SET_INT_F(0, "full-name", &prefix_len,
 570                               N_("make the output relative to the project top directory"),
 571                               0, PARSE_OPT_NONEG),
 572                 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 573                         N_("recurse through submodules")),
 574                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 575                         N_("if any <file> is not in the index, treat this as an error")),
 576                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 577                         N_("pretend that paths removed since <tree-ish> are still present")),
 578                 OPT__ABBREV(&abbrev),
 579                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 580                 OPT_END()
 581         };
 582
 583         if (argc == 2 && !strcmp(argv[1], "-h"))
 584                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 585
 586         memset(&dir, 0, sizeof(dir));
 587         prefix = cmd_prefix;
 588         if (prefix)
 589                 prefix_len = strlen(prefix);
 590         git_config(git_default_config, NULL);
 591
 592         if (repo_read_index(the_repository) < 0)
 593                 die("index file corrupt");
 594
 595         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 596                         ls_files_usage, 0);
 597         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 598         for (i = 0; i < exclude_list.nr; i++) {
 599                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 600         }
 601         if (show_tag || show_valid_bit || show_fsmonitor_bit) {
 602                 tag_cached = "H ";
 603                 tag_unmerged = "M ";
 604                 tag_removed = "R ";
 605                 tag_modified = "C ";
 606                 tag_other = "? ";
 607                 tag_killed = "K ";
 608                 tag_skip_worktree = "S ";
 609                 tag_resolve_undo = "U ";
 610         }
 611         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 612                 require_work_tree = 1;
 613         if (show_unmerged)
 614                 /*
 615                  * There's no point in showing unmerged unless
 616                  * you also show the stage information.
 617                  */
 618                 show_stage = 1;
 619         if (dir.exclude_per_dir)
 620                 exc_given = 1;
 621
 622         if (require_work_tree && !is_inside_work_tree())
 623                 setup_work_tree();
 624
 625         if (recurse_submodules &&
 626             (show_stage || show_deleted || show_others || show_unmerged ||
 627              show_killed || show_modified || show_resolve_undo || with_tree))
 628                 die("ls-files --recurse-submodules unsupported mode");
 629
 630         if (recurse_submodules && error_unmatch)
 631                 die("ls-files --recurse-submodules does not support "
 632                     "--error-unmatch");
 633
 634         parse_pathspec(&pathspec, 0,
 635                        PATHSPEC_PREFER_CWD,
 636                        prefix, argv);
 637
 638         /*
 639          * Find common prefix for all pathspec's
 640          * This is used as a performance optimization which unfortunately cannot
 641          * be done when recursing into submodules because when a pathspec is
 642          * given which spans repository boundaries you can't simply remove the
 643          * submodule entry because the pathspec may match something inside the
 644          * submodule.
 645          */
 646         if (recurse_submodules)
 647                 max_prefix = NULL;
 648         else
 649                 max_prefix = common_prefix(&pathspec);
 650         max_prefix_len = get_common_prefix_len(max_prefix);
 651
 652         prune_index(the_repository->index, max_prefix, max_prefix_len);
 653
 654         /* Treat unmatching pathspec elements as errors */
 655         if (pathspec.nr && error_unmatch)
 656                 ps_matched = xcalloc(pathspec.nr, 1);
 657
 658         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 659                 die("ls-files --ignored needs some exclude pattern");
 660
 661         /* With no flags, we default to showing the cached files */
 662         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 663               show_killed || show_modified || show_resolve_undo))
 664                 show_cached = 1;
 665
 666         if (with_tree) {
 667                 /*
 668                  * Basic sanity check; show-stages and show-unmerged
 669                  * would not make any sense with this option.
 670                  */
 671                 if (show_stage || show_unmerged)
 672                         die("ls-files --with-tree is incompatible with -s or -u");
 673                 overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
 674         }
 675
 676         show_files(the_repository, &dir);
 677
 678         if (show_resolve_undo)
 679                 show_ru_info(the_repository->index);
 680
 681         if (ps_matched) {
 682                 int bad;
 683                 bad = report_path_error(ps_matched, &pathspec);
 684                 if (bad)
 685                         fprintf(stderr, "Did you forget to 'git add'?\n");
 686
 687                 return bad ? 1 : 0;
 688         }
 689
 690         UNLEAK(dir);
 691         return 0;
 692 }