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 ps_matches is non-NULL, figure out which pathspec(s) match. */
 132         if (ps_matched)
 133                 dir_path_match(istate, ent, &pathspec, len, ps_matched);
 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 subrepo;
 210         const struct submodule *sub = submodule_from_path(superproject,
 211                                                           &null_oid, path);
 212
 213         if (repo_submodule_init(&subrepo, superproject, sub))
 214                 return;
 215
 216         if (repo_read_index(&subrepo) < 0)
 217                 die("index file corrupt");
 218
 219         show_files(&subrepo, dir);
 220
 221         repo_clear(&subrepo);
 222 }
 223
 224 static void show_ce(struct repository *repo, struct dir_struct *dir,
 225                     const struct cache_entry *ce, const char *fullname,
 226                     const char *tag)
 227 {
 228         if (max_prefix_len > strlen(fullname))
 229                 die("git ls-files: internal error - cache entry not superset of prefix");
 230
 231         if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 232             is_submodule_active(repo, ce->name)) {
 233                 show_submodule(repo, dir, ce->name);
 234         } else if (match_pathspec(repo->index, &pathspec, fullname, strlen(fullname),
 235                                   max_prefix_len, ps_matched,
 236                                   S_ISDIR(ce->ce_mode) ||
 237                                   S_ISGITLINK(ce->ce_mode))) {
 238                 tag = get_tag(ce, tag);
 239
 240                 if (!show_stage) {
 241                         fputs(tag, stdout);
 242                 } else {
 243                         printf("%s%06o %s %d\t",
 244                                tag,
 245                                ce->ce_mode,
 246                                find_unique_abbrev(&ce->oid, abbrev),
 247                                ce_stage(ce));
 248                 }
 249                 write_eolinfo(repo->index, ce, fullname);
 250                 write_name(fullname);
 251                 print_debug(ce);
 252         }
 253 }
 254
 255 static void show_ru_info(const struct index_state *istate)
 256 {
 257         struct string_list_item *item;
 258
 259         if (!istate->resolve_undo)
 260                 return;
 261
 262         for_each_string_list_item(item, istate->resolve_undo) {
 263                 const char *path = item->string;
 264                 struct resolve_undo_info *ui = item->util;
 265                 int i, len;
 266
 267                 len = strlen(path);
 268                 if (len < max_prefix_len)
 269                         continue; /* outside of the prefix */
 270                 if (!match_pathspec(istate, &pathspec, path, len,
 271                                     max_prefix_len, ps_matched, 0))
 272                         continue; /* uninterested */
 273                 for (i = 0; i < 3; i++) {
 274                         if (!ui->mode[i])
 275                                 continue;
 276                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 277                                find_unique_abbrev(&ui->oid[i], abbrev),
 278                                i + 1);
 279                         write_name(path);
 280                 }
 281         }
 282 }
 283
 284 static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
 285                        const char *fullname, const struct cache_entry *ce)
 286 {
 287         int dtype = ce_to_dtype(ce);
 288         return is_excluded(dir, istate, fullname, &dtype);
 289 }
 290
 291 static void construct_fullname(struct strbuf *out, const struct repository *repo,
 292                                const struct cache_entry *ce)
 293 {
 294         strbuf_reset(out);
 295         if (repo->submodule_prefix)
 296                 strbuf_addstr(out, repo->submodule_prefix);
 297         strbuf_addstr(out, ce->name);
 298 }
 299
 300 static void show_files(struct repository *repo, struct dir_struct *dir)
 301 {
 302         int i;
 303         struct strbuf fullname = STRBUF_INIT;
 304
 305         /* For cached/deleted files we don't need to even do the readdir */
 306         if (show_others || show_killed) {
 307                 if (!show_others)
 308                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 309                 fill_directory(dir, repo->index, &pathspec);
 310                 if (show_others)
 311                         show_other_files(repo->index, dir);
 312                 if (show_killed)
 313                         show_killed_files(repo->index, dir);
 314         }
 315         if (show_cached || show_stage) {
 316                 for (i = 0; i < repo->index->cache_nr; i++) {
 317                         const struct cache_entry *ce = repo->index->cache[i];
 318
 319                         construct_fullname(&fullname, repo, ce);
 320
 321                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 322                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 323                                 continue;
 324                         if (show_unmerged && !ce_stage(ce))
 325                                 continue;
 326                         if (ce->ce_flags & CE_UPDATE)
 327                                 continue;
 328                         show_ce(repo, dir, ce, fullname.buf,
 329                                 ce_stage(ce) ? tag_unmerged :
 330                                 (ce_skip_worktree(ce) ? tag_skip_worktree :
 331                                  tag_cached));
 332                 }
 333         }
 334         if (show_deleted || show_modified) {
 335                 for (i = 0; i < repo->index->cache_nr; i++) {
 336                         const struct cache_entry *ce = repo->index->cache[i];
 337                         struct stat st;
 338                         int err;
 339
 340                         construct_fullname(&fullname, repo, ce);
 341
 342                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 343                             !ce_excluded(dir, repo->index, fullname.buf, ce))
 344                                 continue;
 345                         if (ce->ce_flags & CE_UPDATE)
 346                                 continue;
 347                         if (ce_skip_worktree(ce))
 348                                 continue;
 349                         err = lstat(fullname.buf, &st);
 350                         if (show_deleted && err)
 351                                 show_ce(repo, dir, ce, fullname.buf, tag_removed);
 352                         if (show_modified && ie_modified(repo->index, ce, &st, 0))
 353                                 show_ce(repo, dir, ce, fullname.buf, tag_modified);
 354                 }
 355         }
 356
 357         strbuf_release(&fullname);
 358 }
 359
 360 /*
 361  * Prune the index to only contain stuff starting with "prefix"
 362  */
 363 static void prune_index(struct index_state *istate,
 364                         const char *prefix, size_t prefixlen)
 365 {
 366         int pos;
 367         unsigned int first, last;
 368
 369         if (!prefix || !istate->cache_nr)
 370                 return;
 371         pos = index_name_pos(istate, prefix, prefixlen);
 372         if (pos < 0)
 373                 pos = -pos-1;
 374         first = pos;
 375         last = istate->cache_nr;
 376         while (last > first) {
 377                 int next = first + ((last - first) >> 1);
 378                 const struct cache_entry *ce = istate->cache[next];
 379                 if (!strncmp(ce->name, prefix, prefixlen)) {
 380                         first = next+1;
 381                         continue;
 382                 }
 383                 last = next;
 384         }
 385         MOVE_ARRAY(istate->cache, istate->cache + pos, last - pos);
 386         istate->cache_nr = last - pos;
 387 }
 388
 389 static int get_common_prefix_len(const char *common_prefix)
 390 {
 391         int common_prefix_len;
 392
 393         if (!common_prefix)
 394                 return 0;
 395
 396         common_prefix_len = strlen(common_prefix);
 397
 398         /*
 399          * If the prefix has a trailing slash, strip it so that submodules wont
 400          * be pruned from the index.
 401          */
 402         if (common_prefix[common_prefix_len - 1] == '/')
 403                 common_prefix_len--;
 404
 405         return common_prefix_len;
 406 }
 407
 408 /*
 409  * Read the tree specified with --with-tree option
 410  * (typically, HEAD) into stage #1 and then
 411  * squash them down to stage #0.  This is used for
 412  * --error-unmatch to list and check the path patterns
 413  * that were given from the command line.  We are not
 414  * going to write this index out.
 415  */
 416 void overlay_tree_on_index(struct index_state *istate,
 417                            const char *tree_name, const char *prefix)
 418 {
 419         struct tree *tree;
 420         struct object_id oid;
 421         struct pathspec pathspec;
 422         struct cache_entry *last_stage0 = NULL;
 423         int i;
 424
 425         if (get_oid(tree_name, &oid))
 426                 die("tree-ish %s not found.", tree_name);
 427         tree = parse_tree_indirect(&oid);
 428         if (!tree)
 429                 die("bad tree-ish %s", tree_name);
 430
 431         /* Hoist the unmerged entries up to stage #3 to make room */
 432         for (i = 0; i < istate->cache_nr; i++) {
 433                 struct cache_entry *ce = istate->cache[i];
 434                 if (!ce_stage(ce))
 435                         continue;
 436                 ce->ce_flags |= CE_STAGEMASK;
 437         }
 438
 439         if (prefix) {
 440                 static const char *(matchbuf[1]);
 441                 matchbuf[0] = NULL;
 442                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 443                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 444         } else
 445                 memset(&pathspec, 0, sizeof(pathspec));
 446         if (read_tree(the_repository, tree, 1, &pathspec, istate))
 447                 die("unable to read tree entries %s", tree_name);
 448
 449         for (i = 0; i < istate->cache_nr; i++) {
 450                 struct cache_entry *ce = istate->cache[i];
 451                 switch (ce_stage(ce)) {
 452                 case 0:
 453                         last_stage0 = ce;
 454                         /* fallthru */
 455                 default:
 456                         continue;
 457                 case 1:
 458                         /*
 459                          * If there is stage #0 entry for this, we do not
 460                          * need to show it.  We use CE_UPDATE bit to mark
 461                          * such an entry.
 462                          */
 463                         if (last_stage0 &&
 464                             !strcmp(last_stage0->name, ce->name))
 465                                 ce->ce_flags |= CE_UPDATE;
 466                 }
 467         }
 468 }
 469
 470 static const char * const ls_files_usage[] = {
 471         N_("git ls-files [<options>] [<file>...]"),
 472         NULL
 473 };
 474
 475 static int option_parse_exclude(const struct option *opt,
 476                                 const char *arg, int unset)
 477 {
 478         struct string_list *exclude_list = opt->value;
 479
 480         BUG_ON_OPT_NEG(unset);
 481
 482         exc_given = 1;
 483         string_list_append(exclude_list, arg);
 484
 485         return 0;
 486 }
 487
 488 static int option_parse_exclude_from(const struct option *opt,
 489                                      const char *arg, int unset)
 490 {
 491         struct dir_struct *dir = opt->value;
 492
 493         BUG_ON_OPT_NEG(unset);
 494
 495         exc_given = 1;
 496         add_patterns_from_file(dir, arg);
 497
 498         return 0;
 499 }
 500
 501 static int option_parse_exclude_standard(const struct option *opt,
 502                                          const char *arg, int unset)
 503 {
 504         struct dir_struct *dir = opt->value;
 505
 506         BUG_ON_OPT_NEG(unset);
 507         BUG_ON_OPT_ARG(arg);
 508
 509         exc_given = 1;
 510         setup_standard_excludes(dir);
 511
 512         return 0;
 513 }
 514
 515 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 516 {
 517         int require_work_tree = 0, show_tag = 0, i;
 518         const char *max_prefix;
 519         struct dir_struct dir;
 520         struct pattern_list *pl;
 521         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 522         struct option builtin_ls_files_options[] = {
 523                 /* Think twice before adding "--nul" synonym to this */
 524                 OPT_SET_INT('z', NULL, &line_terminator,
 525                         N_("paths are separated with NUL character"), '\0'),
 526                 OPT_BOOL('t', NULL, &show_tag,
 527                         N_("identify the file status with tags")),
 528                 OPT_BOOL('v', NULL, &show_valid_bit,
 529                         N_("use lowercase letters for 'assume unchanged' files")),
 530                 OPT_BOOL('f', NULL, &show_fsmonitor_bit,
 531                         N_("use lowercase letters for 'fsmonitor clean' files")),
 532                 OPT_BOOL('c', "cached", &show_cached,
 533                         N_("show cached files in the output (default)")),
 534                 OPT_BOOL('d', "deleted", &show_deleted,
 535                         N_("show deleted files in the output")),
 536                 OPT_BOOL('m', "modified", &show_modified,
 537                         N_("show modified files in the output")),
 538                 OPT_BOOL('o', "others", &show_others,
 539                         N_("show other files in the output")),
 540                 OPT_BIT('i', "ignored", &dir.flags,
 541                         N_("show ignored files in the output"),
 542                         DIR_SHOW_IGNORED),
 543                 OPT_BOOL('s', "stage", &show_stage,
 544                         N_("show staged contents' object name in the output")),
 545                 OPT_BOOL('k', "killed", &show_killed,
 546                         N_("show files on the filesystem that need to be removed")),
 547                 OPT_BIT(0, "directory", &dir.flags,
 548                         N_("show 'other' directories' names only"),
 549                         DIR_SHOW_OTHER_DIRECTORIES),
 550                 OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 551                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 552                         N_("don't show empty directories"),
 553                         DIR_HIDE_EMPTY_DIRECTORIES),
 554                 OPT_BOOL('u', "unmerged", &show_unmerged,
 555                         N_("show unmerged files in the output")),
 556                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 557                             N_("show resolve-undo information")),
 558                 OPT_CALLBACK_F('x', "exclude", &exclude_list, N_("pattern"),
 559                         N_("skip files matching pattern"),
 560                         PARSE_OPT_NONEG, option_parse_exclude),
 561                 OPT_CALLBACK_F('X', "exclude-from", &dir, N_("file"),
 562                         N_("exclude patterns are read from <file>"),
 563                         PARSE_OPT_NONEG, option_parse_exclude_from),
 564                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 565                         N_("read additional per-directory exclude patterns in <file>")),
 566                 OPT_CALLBACK_F(0, "exclude-standard", &dir, NULL,
 567                         N_("add the standard git exclusions"),
 568                         PARSE_OPT_NOARG | PARSE_OPT_NONEG,
 569                         option_parse_exclude_standard),
 570                 OPT_SET_INT_F(0, "full-name", &prefix_len,
 571                               N_("make the output relative to the project top directory"),
 572                               0, PARSE_OPT_NONEG),
 573                 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 574                         N_("recurse through submodules")),
 575                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 576                         N_("if any <file> is not in the index, treat this as an error")),
 577                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 578                         N_("pretend that paths removed since <tree-ish> are still present")),
 579                 OPT__ABBREV(&abbrev),
 580                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 581                 OPT_END()
 582         };
 583
 584         if (argc == 2 && !strcmp(argv[1], "-h"))
 585                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 586
 587         memset(&dir, 0, sizeof(dir));
 588         prefix = cmd_prefix;
 589         if (prefix)
 590                 prefix_len = strlen(prefix);
 591         git_config(git_default_config, NULL);
 592
 593         if (repo_read_index(the_repository) < 0)
 594                 die("index file corrupt");
 595
 596         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 597                         ls_files_usage, 0);
 598         pl = add_pattern_list(&dir, EXC_CMDL, "--exclude option");
 599         for (i = 0; i < exclude_list.nr; i++) {
 600                 add_pattern(exclude_list.items[i].string, "", 0, pl, --exclude_args);
 601         }
 602         if (show_tag || show_valid_bit || show_fsmonitor_bit) {
 603                 tag_cached = "H ";
 604                 tag_unmerged = "M ";
 605                 tag_removed = "R ";
 606                 tag_modified = "C ";
 607                 tag_other = "? ";
 608                 tag_killed = "K ";
 609                 tag_skip_worktree = "S ";
 610                 tag_resolve_undo = "U ";
 611         }
 612         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 613                 require_work_tree = 1;
 614         if (show_unmerged)
 615                 /*
 616                  * There's no point in showing unmerged unless
 617                  * you also show the stage information.
 618                  */
 619                 show_stage = 1;
 620         if (dir.exclude_per_dir)
 621                 exc_given = 1;
 622
 623         if (require_work_tree && !is_inside_work_tree())
 624                 setup_work_tree();
 625
 626         if (recurse_submodules &&
 627             (show_stage || show_deleted || show_others || show_unmerged ||
 628              show_killed || show_modified || show_resolve_undo || with_tree))
 629                 die("ls-files --recurse-submodules unsupported mode");
 630
 631         if (recurse_submodules && error_unmatch)
 632                 die("ls-files --recurse-submodules does not support "
 633                     "--error-unmatch");
 634
 635         parse_pathspec(&pathspec, 0,
 636                        PATHSPEC_PREFER_CWD,
 637                        prefix, argv);
 638
 639         /*
 640          * Find common prefix for all pathspec's
 641          * This is used as a performance optimization which unfortunately cannot
 642          * be done when recursing into submodules because when a pathspec is
 643          * given which spans repository boundaries you can't simply remove the
 644          * submodule entry because the pathspec may match something inside the
 645          * submodule.
 646          */
 647         if (recurse_submodules)
 648                 max_prefix = NULL;
 649         else
 650                 max_prefix = common_prefix(&pathspec);
 651         max_prefix_len = get_common_prefix_len(max_prefix);
 652
 653         prune_index(the_repository->index, max_prefix, max_prefix_len);
 654
 655         /* Treat unmatching pathspec elements as errors */
 656         if (pathspec.nr && error_unmatch)
 657                 ps_matched = xcalloc(pathspec.nr, 1);
 658
 659         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 660                 die("ls-files --ignored needs some exclude pattern");
 661
 662         /* With no flags, we default to showing the cached files */
 663         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 664               show_killed || show_modified || show_resolve_undo))
 665                 show_cached = 1;
 666
 667         if (with_tree) {
 668                 /*
 669                  * Basic sanity check; show-stages and show-unmerged
 670                  * would not make any sense with this option.
 671                  */
 672                 if (show_stage || show_unmerged)
 673                         die("ls-files --with-tree is incompatible with -s or -u");
 674                 overlay_tree_on_index(the_repository->index, with_tree, max_prefix);
 675         }
 676
 677         show_files(the_repository, &dir);
 678
 679         if (show_resolve_undo)
 680                 show_ru_info(the_repository->index);
 681
 682         if (ps_matched) {
 683                 int bad;
 684                 bad = report_path_error(ps_matched, &pathspec);
 685                 if (bad)
 686                         fprintf(stderr, "Did you forget to 'git add'?\n");
 687
 688                 return bad ? 1 : 0;
 689         }
 690
 691         UNLEAK(dir);
 692         return 0;
 693 }