git.oblomov.eu Git - git/blob - 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(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 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(ent, &pathspec, len, ps_matched))
 132                 return;
 133
 134         fputs(tag, stdout);
 135         write_eolinfo(NULL, 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(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(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 submodule;
 209
 210         if (repo_submodule_init(&submodule, superproject, path))
 211                 return;
 212
 213         if (repo_read_index(&submodule) < 0)
 214                 die("index file corrupt");
 215
 216         show_files(&submodule, dir);
 217
 218         repo_clear(&submodule);
 219 }
 220
 221 static void show_ce(struct repository *repo, struct dir_struct *dir,
 222                     const struct cache_entry *ce, const char *fullname,
 223                     const char *tag)
 224 {
 225         if (max_prefix_len > strlen(fullname))
 226                 die("git ls-files: internal error - cache entry not superset of prefix");
 227
 228         if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 229             is_submodule_active(repo, ce->name)) {
 230                 show_submodule(repo, dir, ce->name);
 231         } else if (match_pathspec(&pathspec, fullname, strlen(fullname),
 232                                   max_prefix_len, ps_matched,
 233                                   S_ISDIR(ce->ce_mode) ||
 234                                   S_ISGITLINK(ce->ce_mode))) {
 235                 tag = get_tag(ce, tag);
 236
 237                 if (!show_stage) {
 238                         fputs(tag, stdout);
 239                 } else {
 240                         printf("%s%06o %s %d\t",
 241                                tag,
 242                                ce->ce_mode,
 243                                find_unique_abbrev(&ce->oid, abbrev),
 244                                ce_stage(ce));
 245                 }
 246                 write_eolinfo(repo->index, ce, fullname);
 247                 write_name(fullname);
 248                 print_debug(ce);
 249         }
 250 }
 251
 252 static void show_ru_info(const struct index_state *istate)
 253 {
 254         struct string_list_item *item;
 255
 256         if (!istate->resolve_undo)
 257                 return;
 258
 259         for_each_string_list_item(item, istate->resolve_undo) {
 260                 const char *path = item->string;
 261                 struct resolve_undo_info *ui = item->util;
 262                 int i, len;
 263
 264                 len = strlen(path);
 265                 if (len < max_prefix_len)
 266                         continue; /* outside of the prefix */
 267                 if (!match_pathspec(&pathspec, path, len,
 268                                     max_prefix_len, ps_matched, 0))
 269                         continue; /* uninterested */
 270                 for (i = 0; i < 3; i++) {
 271                         if (!ui->mode[i])
 272                                 continue;
 273                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 274                                find_unique_abbrev(&ui->oid[i], abbrev),
 275                                i + 1);
 276                         write_name(path);
 277                 }
 278         }
 279 }
 280
 281 static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
 282                        const char *fullname, const struct cache_entry *ce)
 283 {
 284         int dtype = ce_to_dtype(ce);
 285         return is_excluded(dir, istate, fullname, &dtype);
 286 }
 287
 288 static void construct_fullname(struct strbuf *out, const struct repository *repo,
 289                                const struct cache_entry *ce)
 290 {
 291         strbuf_reset(out);
 292         if (repo->submodule_prefix)
 293                 strbuf_addstr(out, repo->submodule_prefix);
 294         strbuf_addstr(out, ce->name);
 295 }
 296
 297 static void show_files(struct repository *repo, struct dir_struct *dir)
 298 {
 299         int i;
 300         struct strbuf fullname = STRBUF_INIT;
 301
 302         /* For cached/deleted files we don't need to even do the readdir */
 303         if (show_others || show_killed) {
 304                 if (!show_others)
 305                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 306                 fill_directory(dir, repo->index, &pathspec);
 307                 if (show_others)
 308                         show_other_files(repo->index, dir);
 309                 if (show_killed)
 310                         show_killed_files(repo->index, dir);
 311         }
 312         if (show_cached || show_stage) {
 313                 for (i = 0; i < repo->index->cache_nr; i++) {
 314                         const struct cache_entry *ce = repo->index->cache[i];
 315
 316                         construct_fullname(&fullname, repo, ce);
 317
 318                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 319                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 320                                 continue;
 321                         if (show_unmerged && !ce_stage(ce))
 322                                 continue;
 323                         if (ce->ce_flags & CE_UPDATE)
 324                                 continue;
 325                         show_ce(repo, dir, ce, fullname.buf,
 326                                 ce_stage(ce) ? tag_unmerged :
 327                                 (ce_skip_worktree(ce) ? tag_skip_worktree :
 328                                  tag_cached));
 329                 }
 330         }
 331         if (show_deleted || show_modified) {
 332                 for (i = 0; i < repo->index->cache_nr; i++) {
 333                         const struct cache_entry *ce = repo->index->cache[i];
 334                         struct stat st;
 335                         int err;
 336
 337                         construct_fullname(&fullname, repo, ce);
 338
 339                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 340                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 341                                 continue;
 342                         if (ce->ce_flags & CE_UPDATE)
 343                                 continue;
 344                         if (ce_skip_worktree(ce))
 345                                 continue;
 346                         err = lstat(fullname.buf, &st);
 347                         if (show_deleted && err)
 348                                 show_ce(repo, dir, ce, fullname.buf, tag_removed);
 349                         if (show_modified && ie_modified(repo->index, ce, &st, 0))
 350                                 show_ce(repo, dir, ce, fullname.buf, tag_modified);
 351                 }
 352         }
 353
 354         strbuf_release(&fullname);
 355 }
 356
 357 /*
 358  * Prune the index to only contain stuff starting with "prefix"
 359  */
 360 static void prune_index(struct index_state *istate,
 361                         const char *prefix, size_t prefixlen)
 362 {
 363         int pos;
 364         unsigned int first, last;
 365
 366         if (!prefix || !istate->cache_nr)
 367                 return;
 368         pos = index_name_pos(istate, prefix, prefixlen);
 369         if (pos < 0)
 370                 pos = -pos-1;
 371         first = pos;
 372         last = istate->cache_nr;
 373         while (last > first) {
 374                 int next = (last + first) >> 1;
 375                 const struct cache_entry *ce = istate->cache[next];
 376                 if (!strncmp(ce->name, prefix, prefixlen)) {
 377                         first = next+1;
 378                         continue;
 379                 }
 380                 last = next;
 381         }
 382         MOVE_ARRAY(istate->cache, istate->cache + pos, last - pos);
 383         istate->cache_nr = last - pos;
 384 }
 385
 386 static int get_common_prefix_len(const char *common_prefix)
 387 {
 388         int common_prefix_len;
 389
 390         if (!common_prefix)
 391                 return 0;
 392
 393         common_prefix_len = strlen(common_prefix);
 394
 395         /*
 396          * If the prefix has a trailing slash, strip it so that submodules wont
 397          * be pruned from the index.
 398          */
 399         if (common_prefix[common_prefix_len - 1] == '/')
 400                 common_prefix_len--;
 401
 402         return common_prefix_len;
 403 }
 404
 405 /*
 406  * Read the tree specified with --with-tree option
 407  * (typically, HEAD) into stage #1 and then
 408  * squash them down to stage #0.  This is used for
 409  * --error-unmatch to list and check the path patterns
 410  * that were given from the command line.  We are not
 411  * going to write this index out.
 412  */
 413 void overlay_tree_on_index(struct index_state *istate,
 414                            const char *tree_name, const char *prefix)
 415 {
 416         struct tree *tree;
 417         struct object_id oid;
 418         struct pathspec pathspec;
 419         struct cache_entry *last_stage0 = NULL;
 420         int i;
 421
 422         if (get_oid(tree_name, &oid))
 423                 die("tree-ish %s not found.", tree_name);
 424         tree = parse_tree_indirect(&oid);
 425         if (!tree)
 426                 die("bad tree-ish %s", tree_name);
 427
 428         /* Hoist the unmerged entries up to stage #3 to make room */
 429         for (i = 0; i < istate->cache_nr; i++) {
 430                 struct cache_entry *ce = istate->cache[i];
 431                 if (!ce_stage(ce))
 432                         continue;
 433                 ce->ce_flags |= CE_STAGEMASK;
 434         }
 435
 436         if (prefix) {
 437                 static const char *(matchbuf[1]);
 438                 matchbuf[0] = NULL;
 439                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 440                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 441         } else
 442                 memset(&pathspec, 0, sizeof(pathspec));
 443         if (read_tree(tree, 1, &pathspec, istate))
 444                 die("unable to read tree entries %s", tree_name);
 445
 446         for (i = 0; i < istate->cache_nr; i++) {
 447                 struct cache_entry *ce = istate->cache[i];
 448                 switch (ce_stage(ce)) {
 449                 case 0:
 450                         last_stage0 = ce;
 451                         /* fallthru */
 452                 default:
 453                         continue;
 454                 case 1:
 455                         /*
 456                          * If there is stage #0 entry for this, we do not
 457                          * need to show it.  We use CE_UPDATE bit to mark
 458                          * such an entry.
 459                          */
 460                         if (last_stage0 &&
 461                             !strcmp(last_stage0->name, ce->name))
 462                                 ce->ce_flags |= CE_UPDATE;
 463                 }
 464         }
 465 }
 466
 467 static const char * const ls_files_usage[] = {
 468         N_("git ls-files [<options>] [<file>...]"),
 469         NULL
 470 };
 471
 472 static int option_parse_exclude(const struct option *opt,
 473                                 const char *arg, int unset)
 474 {
 475         struct string_list *exclude_list = opt->value;
 476
 477         exc_given = 1;
 478         string_list_append(exclude_list, arg);
 479
 480         return 0;
 481 }
 482
 483 static int option_parse_exclude_from(const struct option *opt,
 484                                      const char *arg, int unset)
 485 {
 486         struct dir_struct *dir = opt->value;
 487
 488         exc_given = 1;
 489         add_excludes_from_file(dir, arg);
 490
 491         return 0;
 492 }
 493
 494 static int option_parse_exclude_standard(const struct option *opt,
 495                                          const char *arg, int unset)
 496 {
 497         struct dir_struct *dir = opt->value;
 498
 499         exc_given = 1;
 500         setup_standard_excludes(dir);
 501
 502         return 0;
 503 }
 504
 505 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 506 {
 507         int require_work_tree = 0, show_tag = 0, i;
 508         const char *max_prefix;
 509         struct dir_struct dir;
 510         struct exclude_list *el;
 511         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 512         struct option builtin_ls_files_options[] = {
 513                 /* Think twice before adding "--nul" synonym to this */
 514                 OPT_SET_INT('z', NULL, &line_terminator,
 515                         N_("paths are separated with NUL character"), '\0'),
 516                 OPT_BOOL('t', NULL, &show_tag,
 517                         N_("identify the file status with tags")),
 518                 OPT_BOOL('v', NULL, &show_valid_bit,
 519                         N_("use lowercase letters for 'assume unchanged' files")),
 520                 OPT_BOOL('f', NULL, &show_fsmonitor_bit,
 521                         N_("use lowercase letters for 'fsmonitor clean' files")),
 522                 OPT_BOOL('c', "cached", &show_cached,
 523                         N_("show cached files in the output (default)")),
 524                 OPT_BOOL('d', "deleted", &show_deleted,
 525                         N_("show deleted files in the output")),
 526                 OPT_BOOL('m', "modified", &show_modified,
 527                         N_("show modified files in the output")),
 528                 OPT_BOOL('o', "others", &show_others,
 529                         N_("show other files in the output")),
 530                 OPT_BIT('i', "ignored", &dir.flags,
 531                         N_("show ignored files in the output"),
 532                         DIR_SHOW_IGNORED),
 533                 OPT_BOOL('s', "stage", &show_stage,
 534                         N_("show staged contents' object name in the output")),
 535                 OPT_BOOL('k', "killed", &show_killed,
 536                         N_("show files on the filesystem that need to be removed")),
 537                 OPT_BIT(0, "directory", &dir.flags,
 538                         N_("show 'other' directories' names only"),
 539                         DIR_SHOW_OTHER_DIRECTORIES),
 540                 OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 541                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 542                         N_("don't show empty directories"),
 543                         DIR_HIDE_EMPTY_DIRECTORIES),
 544                 OPT_BOOL('u', "unmerged", &show_unmerged,
 545                         N_("show unmerged files in the output")),
 546                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 547                             N_("show resolve-undo information")),
 548                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 549                         N_("skip files matching pattern"),
 550                         0, option_parse_exclude },
 551                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 552                         N_("exclude patterns are read from <file>"),
 553                         0, option_parse_exclude_from },
 554                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 555                         N_("read additional per-directory exclude patterns in <file>")),
 556                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 557                         N_("add the standard git exclusions"),
 558                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 559                 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 560                         N_("make the output relative to the project top directory"),
 561                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 562                 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 563                         N_("recurse through submodules")),
 564                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 565                         N_("if any <file> is not in the index, treat this as an error")),
 566                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 567                         N_("pretend that paths removed since <tree-ish> are still present")),
 568                 OPT__ABBREV(&abbrev),
 569                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 570                 OPT_END()
 571         };
 572
 573         if (argc == 2 && !strcmp(argv[1], "-h"))
 574                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 575
 576         memset(&dir, 0, sizeof(dir));
 577         prefix = cmd_prefix;
 578         if (prefix)
 579                 prefix_len = strlen(prefix);
 580         git_config(git_default_config, NULL);
 581
 582         if (repo_read_index(the_repository) < 0)
 583                 die("index file corrupt");
 584
 585         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 586                         ls_files_usage, 0);
 587         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 588         for (i = 0; i < exclude_list.nr; i++) {
 589                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 590         }
 591         if (show_tag || show_valid_bit || show_fsmonitor_bit) {
 592                 tag_cached = "H ";
 593                 tag_unmerged = "M ";
 594                 tag_removed = "R ";
 595                 tag_modified = "C ";
 596                 tag_other = "? ";
 597                 tag_killed = "K ";
 598                 tag_skip_worktree = "S ";
 599                 tag_resolve_undo = "U ";
 600         }
 601         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 602                 require_work_tree = 1;
 603         if (show_unmerged)
 604                 /*
 605                  * There's no point in showing unmerged unless
 606                  * you also show the stage information.
 607                  */
 608                 show_stage = 1;
 609         if (dir.exclude_per_dir)
 610                 exc_given = 1;
 611
 612         if (require_work_tree && !is_inside_work_tree())
 613                 setup_work_tree();
 614
 615         if (recurse_submodules &&
 616             (show_stage || show_deleted || show_others || show_unmerged ||
 617              show_killed || show_modified || show_resolve_undo || with_tree))
 618                 die("ls-files --recurse-submodules unsupported mode");
 619
 620         if (recurse_submodules && error_unmatch)
 621                 die("ls-files --recurse-submodules does not support "
 622                     "--error-unmatch");
 623
 624         parse_pathspec(&pathspec, 0,
 625                        PATHSPEC_PREFER_CWD,
 626                        prefix, argv);
 627
 628         /*
 629          * Find common prefix for all pathspec's
 630          * This is used as a performance optimization which unfortunately cannot
 631          * be done when recursing into submodules because when a pathspec is
 632          * given which spans repository boundaries you can't simply remove the
 633          * submodule entry because the pathspec may match something inside the
 634          * submodule.
 635          */
 636         if (recurse_submodules)
 637                 max_prefix = NULL;
 638         else
 639                 max_prefix = common_prefix(&pathspec);
 640         max_prefix_len = get_common_prefix_len(max_prefix);
 641
 642         prune_index(the_repository->index, max_prefix, max_prefix_len);
 643
 644         /* Treat unmatching pathspec elements as errors */
 645         if (pathspec.nr && error_unmatch)
 646                 ps_matched = xcalloc(pathspec.nr, 1);
 647
 648         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 649                 die("ls-files --ignored needs some exclude pattern");
 650
 651         /* With no flags, we default to showing the cached files */
 652         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 653               show_killed || show_modified || show_resolve_undo))
 654                 show_cached = 1;
 655
 656         if (with_tree) {
 657                 /*
 658                  * Basic sanity check; show-stages and show-unmerged
 659                  * would not make any sense with this option.
 660                  */
 661                 if (show_stage || show_unmerged)
 662                         die("ls-files --with-tree is incompatible with -s or -u");
 663                 overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
 664         }
 665
 666         show_files(the_repository, &dir);
 667
 668         if (show_resolve_undo)
 669                 show_ru_info(the_repository->index);
 670
 671         if (ps_matched) {
 672                 int bad;
 673                 bad = report_path_error(ps_matched, &pathspec, prefix);
 674                 if (bad)
 675                         fprintf(stderr, "Did you forget to 'git add'?\n");
 676
 677                 return bad ? 1 : 0;
 678         }
 679
 680         UNLEAK(dir);
 681         return 0;
 682 }