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 "quote.h"
  10 #include "dir.h"
  11 #include "builtin.h"
  12 #include "tree.h"
  13 #include "parse-options.h"
  14 #include "resolve-undo.h"
  15 #include "string-list.h"
  16 #include "pathspec.h"
  17 #include "run-command.h"
  18 #include "submodule.h"
  19
  20 static int abbrev;
  21 static int show_deleted;
  22 static int show_cached;
  23 static int show_others;
  24 static int show_stage;
  25 static int show_unmerged;
  26 static int show_resolve_undo;
  27 static int show_modified;
  28 static int show_killed;
  29 static int show_valid_bit;
  30 static int line_terminator = '\n';
  31 static int debug_mode;
  32 static int show_eol;
  33 static int recurse_submodules;
  34 static struct argv_array submodule_options = ARGV_ARRAY_INIT;
  35
  36 static const char *prefix;
  37 static const char *super_prefix;
  38 static int max_prefix_len;
  39 static int prefix_len;
  40 static struct pathspec pathspec;
  41 static int error_unmatch;
  42 static char *ps_matched;
  43 static const char *with_tree;
  44 static int exc_given;
  45 static int exclude_args;
  46
  47 static const char *tag_cached = "";
  48 static const char *tag_unmerged = "";
  49 static const char *tag_removed = "";
  50 static const char *tag_other = "";
  51 static const char *tag_killed = "";
  52 static const char *tag_modified = "";
  53 static const char *tag_skip_worktree = "";
  54 static const char *tag_resolve_undo = "";
  55
  56 static void write_eolinfo(const struct index_state *istate,
  57                           const struct cache_entry *ce, const char *path)
  58 {
  59         if (show_eol) {
  60                 struct stat st;
  61                 const char *i_txt = "";
  62                 const char *w_txt = "";
  63                 const char *a_txt = get_convert_attr_ascii(path);
  64                 if (ce && S_ISREG(ce->ce_mode))
  65                         i_txt = get_cached_convert_stats_ascii(istate,
  66                                                                ce->name);
  67                 if (!lstat(path, &st) && S_ISREG(st.st_mode))
  68                         w_txt = get_wt_convert_stats_ascii(path);
  69                 printf("i/%-5s w/%-5s attr/%-17s\t", i_txt, w_txt, a_txt);
  70         }
  71 }
  72
  73 static void write_name(const char *name)
  74 {
  75         /*
  76          * Prepend the super_prefix to name to construct the full_name to be
  77          * written.
  78          */
  79         struct strbuf full_name = STRBUF_INIT;
  80         if (super_prefix) {
  81                 strbuf_addstr(&full_name, super_prefix);
  82                 strbuf_addstr(&full_name, name);
  83                 name = full_name.buf;
  84         }
  85
  86         /*
  87          * With "--full-name", prefix_len=0; this caller needs to pass
  88          * an empty string in that case (a NULL is good for "").
  89          */
  90         write_name_quoted_relative(name, prefix_len ? prefix : NULL,
  91                                    stdout, line_terminator);
  92
  93         strbuf_release(&full_name);
  94 }
  95
  96 static const char *get_tag(const struct cache_entry *ce, const char *tag)
  97 {
  98         static char alttag[4];
  99
 100         if (tag && *tag && show_valid_bit && (ce->ce_flags & CE_VALID)) {
 101                 memcpy(alttag, tag, 3);
 102
 103                 if (isalpha(tag[0])) {
 104                         alttag[0] = tolower(tag[0]);
 105                 } else if (tag[0] == '?') {
 106                         alttag[0] = '!';
 107                 } else {
 108                         alttag[0] = 'v';
 109                         alttag[1] = tag[0];
 110                         alttag[2] = ' ';
 111                         alttag[3] = 0;
 112                 }
 113
 114                 tag = alttag;
 115         }
 116
 117         return tag;
 118 }
 119
 120 static void print_debug(const struct cache_entry *ce)
 121 {
 122         if (debug_mode) {
 123                 const struct stat_data *sd = &ce->ce_stat_data;
 124
 125                 printf("  ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 126                 printf("  mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 127                 printf("  dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
 128                 printf("  uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
 129                 printf("  size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
 130         }
 131 }
 132
 133 static void show_dir_entry(const char *tag, struct dir_entry *ent)
 134 {
 135         int len = max_prefix_len;
 136
 137         if (len > ent->len)
 138                 die("git ls-files: internal error - directory entry not superset of prefix");
 139
 140         if (!dir_path_match(ent, &pathspec, len, ps_matched))
 141                 return;
 142
 143         fputs(tag, stdout);
 144         write_eolinfo(NULL, NULL, ent->name);
 145         write_name(ent->name);
 146 }
 147
 148 static void show_other_files(const struct index_state *istate,
 149                              const struct dir_struct *dir)
 150 {
 151         int i;
 152
 153         for (i = 0; i < dir->nr; i++) {
 154                 struct dir_entry *ent = dir->entries[i];
 155                 if (!index_name_is_other(istate, ent->name, ent->len))
 156                         continue;
 157                 show_dir_entry(tag_other, ent);
 158         }
 159 }
 160
 161 static void show_killed_files(const struct index_state *istate,
 162                               const struct dir_struct *dir)
 163 {
 164         int i;
 165         for (i = 0; i < dir->nr; i++) {
 166                 struct dir_entry *ent = dir->entries[i];
 167                 char *cp, *sp;
 168                 int pos, len, killed = 0;
 169
 170                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 171                         sp = strchr(cp, '/');
 172                         if (!sp) {
 173                                 /* If ent->name is prefix of an entry in the
 174                                  * cache, it will be killed.
 175                                  */
 176                                 pos = index_name_pos(istate, ent->name, ent->len);
 177                                 if (0 <= pos)
 178                                         die("BUG: killed-file %.*s not found",
 179                                                 ent->len, ent->name);
 180                                 pos = -pos - 1;
 181                                 while (pos < istate->cache_nr &&
 182                                        ce_stage(istate->cache[pos]))
 183                                         pos++; /* skip unmerged */
 184                                 if (istate->cache_nr <= pos)
 185                                         break;
 186                                 /* pos points at a name immediately after
 187                                  * ent->name in the cache.  Does it expect
 188                                  * ent->name to be a directory?
 189                                  */
 190                                 len = ce_namelen(istate->cache[pos]);
 191                                 if ((ent->len < len) &&
 192                                     !strncmp(istate->cache[pos]->name,
 193                                              ent->name, ent->len) &&
 194                                     istate->cache[pos]->name[ent->len] == '/')
 195                                         killed = 1;
 196                                 break;
 197                         }
 198                         if (0 <= index_name_pos(istate, ent->name, sp - ent->name)) {
 199                                 /* If any of the leading directories in
 200                                  * ent->name is registered in the cache,
 201                                  * ent->name will be killed.
 202                                  */
 203                                 killed = 1;
 204                                 break;
 205                         }
 206                 }
 207                 if (killed)
 208                         show_dir_entry(tag_killed, dir->entries[i]);
 209         }
 210 }
 211
 212 /*
 213  * Compile an argv_array with all of the options supported by --recurse_submodules
 214  */
 215 static void compile_submodule_options(const char **argv,
 216                                       const struct dir_struct *dir,
 217                                       int show_tag)
 218 {
 219         if (line_terminator == '\0')
 220                 argv_array_push(&submodule_options, "-z");
 221         if (show_tag)
 222                 argv_array_push(&submodule_options, "-t");
 223         if (show_valid_bit)
 224                 argv_array_push(&submodule_options, "-v");
 225         if (show_cached)
 226                 argv_array_push(&submodule_options, "--cached");
 227         if (show_eol)
 228                 argv_array_push(&submodule_options, "--eol");
 229         if (debug_mode)
 230                 argv_array_push(&submodule_options, "--debug");
 231
 232         /* Add Pathspecs */
 233         argv_array_push(&submodule_options, "--");
 234         for (; *argv; argv++)
 235                 argv_array_push(&submodule_options, *argv);
 236 }
 237
 238 /**
 239  * Recursively call ls-files on a submodule
 240  */
 241 static void show_gitlink(const struct cache_entry *ce)
 242 {
 243         struct child_process cp = CHILD_PROCESS_INIT;
 244         int status;
 245         char *dir;
 246
 247         prepare_submodule_repo_env(&cp.env_array);
 248         argv_array_push(&cp.env_array, GIT_DIR_ENVIRONMENT);
 249
 250         if (prefix_len)
 251                 argv_array_pushf(&cp.env_array, "%s=%s",
 252                                  GIT_TOPLEVEL_PREFIX_ENVIRONMENT,
 253                                  prefix);
 254         argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
 255                          super_prefix ? super_prefix : "",
 256                          ce->name);
 257         argv_array_push(&cp.args, "ls-files");
 258         argv_array_push(&cp.args, "--recurse-submodules");
 259
 260         /* add supported options */
 261         argv_array_pushv(&cp.args, submodule_options.argv);
 262
 263         cp.git_cmd = 1;
 264         dir = mkpathdup("%s/%s", get_git_work_tree(), ce->name);
 265         cp.dir = dir;
 266         status = run_command(&cp);
 267         free(dir);
 268         if (status)
 269                 exit(status);
 270 }
 271
 272 static void show_ce_entry(const struct index_state *istate,
 273                           const char *tag, const struct cache_entry *ce)
 274 {
 275         struct strbuf name = STRBUF_INIT;
 276         int len = max_prefix_len;
 277         if (super_prefix)
 278                 strbuf_addstr(&name, super_prefix);
 279         strbuf_addstr(&name, ce->name);
 280
 281         if (len > ce_namelen(ce))
 282                 die("git ls-files: internal error - cache entry not superset of prefix");
 283
 284         if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 285             submodule_path_match(&pathspec, name.buf, ps_matched)) {
 286                 show_gitlink(ce);
 287         } else if (match_pathspec(&pathspec, name.buf, name.len,
 288                                   len, ps_matched,
 289                                   S_ISDIR(ce->ce_mode) ||
 290                                   S_ISGITLINK(ce->ce_mode))) {
 291                 tag = get_tag(ce, tag);
 292
 293                 if (!show_stage) {
 294                         fputs(tag, stdout);
 295                 } else {
 296                         printf("%s%06o %s %d\t",
 297                                tag,
 298                                ce->ce_mode,
 299                                find_unique_abbrev(ce->oid.hash, abbrev),
 300                                ce_stage(ce));
 301                 }
 302                 write_eolinfo(istate, ce, ce->name);
 303                 write_name(ce->name);
 304                 print_debug(ce);
 305         }
 306
 307         strbuf_release(&name);
 308 }
 309
 310 static void show_ru_info(const struct index_state *istate)
 311 {
 312         struct string_list_item *item;
 313
 314         if (!istate->resolve_undo)
 315                 return;
 316
 317         for_each_string_list_item(item, istate->resolve_undo) {
 318                 const char *path = item->string;
 319                 struct resolve_undo_info *ui = item->util;
 320                 int i, len;
 321
 322                 len = strlen(path);
 323                 if (len < max_prefix_len)
 324                         continue; /* outside of the prefix */
 325                 if (!match_pathspec(&pathspec, path, len,
 326                                     max_prefix_len, ps_matched, 0))
 327                         continue; /* uninterested */
 328                 for (i = 0; i < 3; i++) {
 329                         if (!ui->mode[i])
 330                                 continue;
 331                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 332                                find_unique_abbrev(ui->sha1[i], abbrev),
 333                                i + 1);
 334                         write_name(path);
 335                 }
 336         }
 337 }
 338
 339 static int ce_excluded(struct dir_struct *dir, struct index_state *istate,
 340                        const struct cache_entry *ce)
 341 {
 342         int dtype = ce_to_dtype(ce);
 343         return is_excluded(dir, istate, ce->name, &dtype);
 344 }
 345
 346 static void show_files(struct index_state *istate, struct dir_struct *dir)
 347 {
 348         int i;
 349
 350         /* For cached/deleted files we don't need to even do the readdir */
 351         if (show_others || show_killed) {
 352                 if (!show_others)
 353                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 354                 fill_directory(dir, istate, &pathspec);
 355                 if (show_others)
 356                         show_other_files(istate, dir);
 357                 if (show_killed)
 358                         show_killed_files(istate, dir);
 359         }
 360         if (show_cached || show_stage) {
 361                 for (i = 0; i < istate->cache_nr; i++) {
 362                         const struct cache_entry *ce = istate->cache[i];
 363                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 364                             !ce_excluded(dir, istate, ce))
 365                                 continue;
 366                         if (show_unmerged && !ce_stage(ce))
 367                                 continue;
 368                         if (ce->ce_flags & CE_UPDATE)
 369                                 continue;
 370                         show_ce_entry(istate, ce_stage(ce) ? tag_unmerged :
 371                                 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 372                 }
 373         }
 374         if (show_deleted || show_modified) {
 375                 for (i = 0; i < istate->cache_nr; i++) {
 376                         const struct cache_entry *ce = istate->cache[i];
 377                         struct stat st;
 378                         int err;
 379                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 380                             !ce_excluded(dir, istate, ce))
 381                                 continue;
 382                         if (ce->ce_flags & CE_UPDATE)
 383                                 continue;
 384                         if (ce_skip_worktree(ce))
 385                                 continue;
 386                         err = lstat(ce->name, &st);
 387                         if (show_deleted && err)
 388                                 show_ce_entry(istate, tag_removed, ce);
 389                         if (show_modified && ie_modified(istate, ce, &st, 0))
 390                                 show_ce_entry(istate, tag_modified, ce);
 391                 }
 392         }
 393 }
 394
 395 /*
 396  * Prune the index to only contain stuff starting with "prefix"
 397  */
 398 static void prune_index(struct index_state *istate,
 399                         const char *prefix, size_t prefixlen)
 400 {
 401         int pos;
 402         unsigned int first, last;
 403
 404         if (!prefix)
 405                 return;
 406         pos = index_name_pos(istate, prefix, prefixlen);
 407         if (pos < 0)
 408                 pos = -pos-1;
 409         first = pos;
 410         last = istate->cache_nr;
 411         while (last > first) {
 412                 int next = (last + first) >> 1;
 413                 const struct cache_entry *ce = istate->cache[next];
 414                 if (!strncmp(ce->name, prefix, prefixlen)) {
 415                         first = next+1;
 416                         continue;
 417                 }
 418                 last = next;
 419         }
 420         memmove(istate->cache, istate->cache + pos,
 421                 (last - pos) * sizeof(struct cache_entry *));
 422         istate->cache_nr = last - pos;
 423 }
 424
 425 static int get_common_prefix_len(const char *common_prefix)
 426 {
 427         int common_prefix_len;
 428
 429         if (!common_prefix)
 430                 return 0;
 431
 432         common_prefix_len = strlen(common_prefix);
 433
 434         /*
 435          * If the prefix has a trailing slash, strip it so that submodules wont
 436          * be pruned from the index.
 437          */
 438         if (common_prefix[common_prefix_len - 1] == '/')
 439                 common_prefix_len--;
 440
 441         return common_prefix_len;
 442 }
 443
 444 /*
 445  * Read the tree specified with --with-tree option
 446  * (typically, HEAD) into stage #1 and then
 447  * squash them down to stage #0.  This is used for
 448  * --error-unmatch to list and check the path patterns
 449  * that were given from the command line.  We are not
 450  * going to write this index out.
 451  */
 452 void overlay_tree_on_index(struct index_state *istate,
 453                            const char *tree_name, const char *prefix)
 454 {
 455         struct tree *tree;
 456         struct object_id oid;
 457         struct pathspec pathspec;
 458         struct cache_entry *last_stage0 = NULL;
 459         int i;
 460
 461         if (get_oid(tree_name, &oid))
 462                 die("tree-ish %s not found.", tree_name);
 463         tree = parse_tree_indirect(&oid);
 464         if (!tree)
 465                 die("bad tree-ish %s", tree_name);
 466
 467         /* Hoist the unmerged entries up to stage #3 to make room */
 468         for (i = 0; i < istate->cache_nr; i++) {
 469                 struct cache_entry *ce = istate->cache[i];
 470                 if (!ce_stage(ce))
 471                         continue;
 472                 ce->ce_flags |= CE_STAGEMASK;
 473         }
 474
 475         if (prefix) {
 476                 static const char *(matchbuf[1]);
 477                 matchbuf[0] = NULL;
 478                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 479                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 480         } else
 481                 memset(&pathspec, 0, sizeof(pathspec));
 482         if (read_tree(tree, 1, &pathspec, istate))
 483                 die("unable to read tree entries %s", tree_name);
 484
 485         for (i = 0; i < istate->cache_nr; i++) {
 486                 struct cache_entry *ce = istate->cache[i];
 487                 switch (ce_stage(ce)) {
 488                 case 0:
 489                         last_stage0 = ce;
 490                         /* fallthru */
 491                 default:
 492                         continue;
 493                 case 1:
 494                         /*
 495                          * If there is stage #0 entry for this, we do not
 496                          * need to show it.  We use CE_UPDATE bit to mark
 497                          * such an entry.
 498                          */
 499                         if (last_stage0 &&
 500                             !strcmp(last_stage0->name, ce->name))
 501                                 ce->ce_flags |= CE_UPDATE;
 502                 }
 503         }
 504 }
 505
 506 static const char * const ls_files_usage[] = {
 507         N_("git ls-files [<options>] [<file>...]"),
 508         NULL
 509 };
 510
 511 static int option_parse_exclude(const struct option *opt,
 512                                 const char *arg, int unset)
 513 {
 514         struct string_list *exclude_list = opt->value;
 515
 516         exc_given = 1;
 517         string_list_append(exclude_list, arg);
 518
 519         return 0;
 520 }
 521
 522 static int option_parse_exclude_from(const struct option *opt,
 523                                      const char *arg, int unset)
 524 {
 525         struct dir_struct *dir = opt->value;
 526
 527         exc_given = 1;
 528         add_excludes_from_file(dir, arg);
 529
 530         return 0;
 531 }
 532
 533 static int option_parse_exclude_standard(const struct option *opt,
 534                                          const char *arg, int unset)
 535 {
 536         struct dir_struct *dir = opt->value;
 537
 538         exc_given = 1;
 539         setup_standard_excludes(dir);
 540
 541         return 0;
 542 }
 543
 544 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 545 {
 546         int require_work_tree = 0, show_tag = 0, i;
 547         const char *max_prefix;
 548         struct dir_struct dir;
 549         struct exclude_list *el;
 550         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 551         struct option builtin_ls_files_options[] = {
 552                 /* Think twice before adding "--nul" synonym to this */
 553                 OPT_SET_INT('z', NULL, &line_terminator,
 554                         N_("paths are separated with NUL character"), '\0'),
 555                 OPT_BOOL('t', NULL, &show_tag,
 556                         N_("identify the file status with tags")),
 557                 OPT_BOOL('v', NULL, &show_valid_bit,
 558                         N_("use lowercase letters for 'assume unchanged' files")),
 559                 OPT_BOOL('c', "cached", &show_cached,
 560                         N_("show cached files in the output (default)")),
 561                 OPT_BOOL('d', "deleted", &show_deleted,
 562                         N_("show deleted files in the output")),
 563                 OPT_BOOL('m', "modified", &show_modified,
 564                         N_("show modified files in the output")),
 565                 OPT_BOOL('o', "others", &show_others,
 566                         N_("show other files in the output")),
 567                 OPT_BIT('i', "ignored", &dir.flags,
 568                         N_("show ignored files in the output"),
 569                         DIR_SHOW_IGNORED),
 570                 OPT_BOOL('s', "stage", &show_stage,
 571                         N_("show staged contents' object name in the output")),
 572                 OPT_BOOL('k', "killed", &show_killed,
 573                         N_("show files on the filesystem that need to be removed")),
 574                 OPT_BIT(0, "directory", &dir.flags,
 575                         N_("show 'other' directories' names only"),
 576                         DIR_SHOW_OTHER_DIRECTORIES),
 577                 OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 578                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 579                         N_("don't show empty directories"),
 580                         DIR_HIDE_EMPTY_DIRECTORIES),
 581                 OPT_BOOL('u', "unmerged", &show_unmerged,
 582                         N_("show unmerged files in the output")),
 583                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 584                             N_("show resolve-undo information")),
 585                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 586                         N_("skip files matching pattern"),
 587                         0, option_parse_exclude },
 588                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 589                         N_("exclude patterns are read from <file>"),
 590                         0, option_parse_exclude_from },
 591                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 592                         N_("read additional per-directory exclude patterns in <file>")),
 593                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 594                         N_("add the standard git exclusions"),
 595                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 596                 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 597                         N_("make the output relative to the project top directory"),
 598                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 599                 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 600                         N_("recurse through submodules")),
 601                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 602                         N_("if any <file> is not in the index, treat this as an error")),
 603                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 604                         N_("pretend that paths removed since <tree-ish> are still present")),
 605                 OPT__ABBREV(&abbrev),
 606                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 607                 OPT_END()
 608         };
 609
 610         if (argc == 2 && !strcmp(argv[1], "-h"))
 611                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 612
 613         memset(&dir, 0, sizeof(dir));
 614         prefix = cmd_prefix;
 615         if (prefix)
 616                 prefix_len = strlen(prefix);
 617         super_prefix = get_super_prefix();
 618         git_config(git_default_config, NULL);
 619
 620         if (read_cache() < 0)
 621                 die("index file corrupt");
 622
 623         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 624                         ls_files_usage, 0);
 625         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 626         for (i = 0; i < exclude_list.nr; i++) {
 627                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 628         }
 629         if (show_tag || show_valid_bit) {
 630                 tag_cached = "H ";
 631                 tag_unmerged = "M ";
 632                 tag_removed = "R ";
 633                 tag_modified = "C ";
 634                 tag_other = "? ";
 635                 tag_killed = "K ";
 636                 tag_skip_worktree = "S ";
 637                 tag_resolve_undo = "U ";
 638         }
 639         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 640                 require_work_tree = 1;
 641         if (show_unmerged)
 642                 /*
 643                  * There's no point in showing unmerged unless
 644                  * you also show the stage information.
 645                  */
 646                 show_stage = 1;
 647         if (dir.exclude_per_dir)
 648                 exc_given = 1;
 649
 650         if (require_work_tree && !is_inside_work_tree())
 651                 setup_work_tree();
 652
 653         if (recurse_submodules)
 654                 compile_submodule_options(argv, &dir, show_tag);
 655
 656         if (recurse_submodules &&
 657             (show_stage || show_deleted || show_others || show_unmerged ||
 658              show_killed || show_modified || show_resolve_undo || with_tree))
 659                 die("ls-files --recurse-submodules unsupported mode");
 660
 661         if (recurse_submodules && error_unmatch)
 662                 die("ls-files --recurse-submodules does not support "
 663                     "--error-unmatch");
 664
 665         parse_pathspec(&pathspec, 0,
 666                        PATHSPEC_PREFER_CWD,
 667                        prefix, argv);
 668
 669         /*
 670          * Find common prefix for all pathspec's
 671          * This is used as a performance optimization which unfortunately cannot
 672          * be done when recursing into submodules
 673          */
 674         if (recurse_submodules)
 675                 max_prefix = NULL;
 676         else
 677                 max_prefix = common_prefix(&pathspec);
 678         max_prefix_len = get_common_prefix_len(max_prefix);
 679
 680         prune_index(&the_index, max_prefix, max_prefix_len);
 681
 682         /* Treat unmatching pathspec elements as errors */
 683         if (pathspec.nr && error_unmatch)
 684                 ps_matched = xcalloc(pathspec.nr, 1);
 685
 686         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 687                 die("ls-files --ignored needs some exclude pattern");
 688
 689         /* With no flags, we default to showing the cached files */
 690         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 691               show_killed || show_modified || show_resolve_undo))
 692                 show_cached = 1;
 693
 694         if (with_tree) {
 695                 /*
 696                  * Basic sanity check; show-stages and show-unmerged
 697                  * would not make any sense with this option.
 698                  */
 699                 if (show_stage || show_unmerged)
 700                         die("ls-files --with-tree is incompatible with -s or -u");
 701                 overlay_tree_on_index(&the_index, with_tree, max_prefix);
 702         }
 703         show_files(&the_index, &dir);
 704         if (show_resolve_undo)
 705                 show_ru_info(&the_index);
 706
 707         if (ps_matched) {
 708                 int bad;
 709                 bad = report_path_error(ps_matched, &pathspec, prefix);
 710                 if (bad)
 711                         fprintf(stderr, "Did you forget to 'git add'?\n");
 712
 713                 return bad ? 1 : 0;
 714         }
 715
 716         return 0;
 717 }