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