b82b78036df7041f25fc2b0df87e6942196e72ac
   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
  20static int abbrev;
  21static int show_deleted;
  22static int show_cached;
  23static int show_others;
  24static int show_stage;
  25static int show_unmerged;
  26static int show_resolve_undo;
  27static int show_modified;
  28static int show_killed;
  29static int show_valid_bit;
  30static int line_terminator = '\n';
  31static int debug_mode;
  32static int show_eol;
  33static int recurse_submodules;
  34static struct argv_array submodule_options = ARGV_ARRAY_INIT;
  35
  36static const char *prefix;
  37static const char *super_prefix;
  38static int max_prefix_len;
  39static int prefix_len;
  40static struct pathspec pathspec;
  41static int error_unmatch;
  42static char *ps_matched;
  43static const char *with_tree;
  44static int exc_given;
  45static int exclude_args;
  46
  47static const char *tag_cached = "";
  48static const char *tag_unmerged = "";
  49static const char *tag_removed = "";
  50static const char *tag_other = "";
  51static const char *tag_killed = "";
  52static const char *tag_modified = "";
  53static const char *tag_skip_worktree = "";
  54static const char *tag_resolve_undo = "";
  55
  56static 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
  73static 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
  96static void show_dir_entry(const char *tag, struct dir_entry *ent)
  97{
  98        int len = max_prefix_len;
  99
 100        if (len > ent->len)
 101                die("git ls-files: internal error - directory entry not superset of prefix");
 102
 103        if (!dir_path_match(ent, &pathspec, len, ps_matched))
 104                return;
 105
 106        fputs(tag, stdout);
 107        write_eolinfo(NULL, NULL, ent->name);
 108        write_name(ent->name);
 109}
 110
 111static void show_other_files(struct dir_struct *dir)
 112{
 113        int i;
 114
 115        for (i = 0; i < dir->nr; i++) {
 116                struct dir_entry *ent = dir->entries[i];
 117                if (!cache_name_is_other(ent->name, ent->len))
 118                        continue;
 119                show_dir_entry(tag_other, ent);
 120        }
 121}
 122
 123static void show_killed_files(const struct index_state *istate,
 124                              const struct dir_struct *dir)
 125{
 126        int i;
 127        for (i = 0; i < dir->nr; i++) {
 128                struct dir_entry *ent = dir->entries[i];
 129                char *cp, *sp;
 130                int pos, len, killed = 0;
 131
 132                for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 133                        sp = strchr(cp, '/');
 134                        if (!sp) {
 135                                /* If ent->name is prefix of an entry in the
 136                                 * cache, it will be killed.
 137                                 */
 138                                pos = index_name_pos(istate, ent->name, ent->len);
 139                                if (0 <= pos)
 140                                        die("BUG: killed-file %.*s not found",
 141                                                ent->len, ent->name);
 142                                pos = -pos - 1;
 143                                while (pos < istate->cache_nr &&
 144                                       ce_stage(istate->cache[pos]))
 145                                        pos++; /* skip unmerged */
 146                                if (istate->cache_nr <= pos)
 147                                        break;
 148                                /* pos points at a name immediately after
 149                                 * ent->name in the cache.  Does it expect
 150                                 * ent->name to be a directory?
 151                                 */
 152                                len = ce_namelen(istate->cache[pos]);
 153                                if ((ent->len < len) &&
 154                                    !strncmp(istate->cache[pos]->name,
 155                                             ent->name, ent->len) &&
 156                                    istate->cache[pos]->name[ent->len] == '/')
 157                                        killed = 1;
 158                                break;
 159                        }
 160                        if (0 <= index_name_pos(istate, ent->name, sp - ent->name)) {
 161                                /* If any of the leading directories in
 162                                 * ent->name is registered in the cache,
 163                                 * ent->name will be killed.
 164                                 */
 165                                killed = 1;
 166                                break;
 167                        }
 168                }
 169                if (killed)
 170                        show_dir_entry(tag_killed, dir->entries[i]);
 171        }
 172}
 173
 174/*
 175 * Compile an argv_array with all of the options supported by --recurse_submodules
 176 */
 177static void compile_submodule_options(const char **argv,
 178                                      const struct dir_struct *dir,
 179                                      int show_tag)
 180{
 181        if (line_terminator == '\0')
 182                argv_array_push(&submodule_options, "-z");
 183        if (show_tag)
 184                argv_array_push(&submodule_options, "-t");
 185        if (show_valid_bit)
 186                argv_array_push(&submodule_options, "-v");
 187        if (show_cached)
 188                argv_array_push(&submodule_options, "--cached");
 189        if (show_eol)
 190                argv_array_push(&submodule_options, "--eol");
 191        if (debug_mode)
 192                argv_array_push(&submodule_options, "--debug");
 193
 194        /* Add Pathspecs */
 195        argv_array_push(&submodule_options, "--");
 196        for (; *argv; argv++)
 197                argv_array_push(&submodule_options, *argv);
 198}
 199
 200/**
 201 * Recursively call ls-files on a submodule
 202 */
 203static void show_gitlink(const struct cache_entry *ce)
 204{
 205        struct child_process cp = CHILD_PROCESS_INIT;
 206        int status;
 207        char *dir;
 208
 209        prepare_submodule_repo_env(&cp.env_array);
 210        argv_array_push(&cp.env_array, GIT_DIR_ENVIRONMENT);
 211
 212        if (prefix_len)
 213                argv_array_pushf(&cp.env_array, "%s=%s",
 214                                 GIT_TOPLEVEL_PREFIX_ENVIRONMENT,
 215                                 prefix);
 216        argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
 217                         super_prefix ? super_prefix : "",
 218                         ce->name);
 219        argv_array_push(&cp.args, "ls-files");
 220        argv_array_push(&cp.args, "--recurse-submodules");
 221
 222        /* add supported options */
 223        argv_array_pushv(&cp.args, submodule_options.argv);
 224
 225        cp.git_cmd = 1;
 226        dir = mkpathdup("%s/%s", get_git_work_tree(), ce->name);
 227        cp.dir = dir;
 228        status = run_command(&cp);
 229        free(dir);
 230        if (status)
 231                exit(status);
 232}
 233
 234static void show_ce_entry(const char *tag, const struct cache_entry *ce)
 235{
 236        struct strbuf name = STRBUF_INIT;
 237        int len = max_prefix_len;
 238        if (super_prefix)
 239                strbuf_addstr(&name, super_prefix);
 240        strbuf_addstr(&name, ce->name);
 241
 242        if (len > ce_namelen(ce))
 243                die("git ls-files: internal error - cache entry not superset of prefix");
 244
 245        if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 246            submodule_path_match(&pathspec, name.buf, ps_matched)) {
 247                show_gitlink(ce);
 248        } else if (match_pathspec(&pathspec, name.buf, name.len,
 249                                  len, ps_matched,
 250                                  S_ISDIR(ce->ce_mode) ||
 251                                  S_ISGITLINK(ce->ce_mode))) {
 252                if (tag && *tag && show_valid_bit &&
 253                    (ce->ce_flags & CE_VALID)) {
 254                        static char alttag[4];
 255                        memcpy(alttag, tag, 3);
 256                        if (isalpha(tag[0]))
 257                                alttag[0] = tolower(tag[0]);
 258                        else if (tag[0] == '?')
 259                                alttag[0] = '!';
 260                        else {
 261                                alttag[0] = 'v';
 262                                alttag[1] = tag[0];
 263                                alttag[2] = ' ';
 264                                alttag[3] = 0;
 265                        }
 266                        tag = alttag;
 267                }
 268
 269                if (!show_stage) {
 270                        fputs(tag, stdout);
 271                } else {
 272                        printf("%s%06o %s %d\t",
 273                               tag,
 274                               ce->ce_mode,
 275                               find_unique_abbrev(ce->oid.hash, abbrev),
 276                               ce_stage(ce));
 277                }
 278                write_eolinfo(&the_index, ce, ce->name);
 279                write_name(ce->name);
 280                if (debug_mode) {
 281                        const struct stat_data *sd = &ce->ce_stat_data;
 282
 283                        printf("  ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 284                        printf("  mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 285                        printf("  dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
 286                        printf("  uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
 287                        printf("  size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
 288                }
 289        }
 290
 291        strbuf_release(&name);
 292}
 293
 294static void show_ru_info(void)
 295{
 296        struct string_list_item *item;
 297
 298        if (!the_index.resolve_undo)
 299                return;
 300
 301        for_each_string_list_item(item, the_index.resolve_undo) {
 302                const char *path = item->string;
 303                struct resolve_undo_info *ui = item->util;
 304                int i, len;
 305
 306                len = strlen(path);
 307                if (len < max_prefix_len)
 308                        continue; /* outside of the prefix */
 309                if (!match_pathspec(&pathspec, path, len,
 310                                    max_prefix_len, ps_matched, 0))
 311                        continue; /* uninterested */
 312                for (i = 0; i < 3; i++) {
 313                        if (!ui->mode[i])
 314                                continue;
 315                        printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 316                               find_unique_abbrev(ui->sha1[i], abbrev),
 317                               i + 1);
 318                        write_name(path);
 319                }
 320        }
 321}
 322
 323static int ce_excluded(struct dir_struct *dir, const struct cache_entry *ce)
 324{
 325        int dtype = ce_to_dtype(ce);
 326        return is_excluded(dir, &the_index, ce->name, &dtype);
 327}
 328
 329static void show_files(struct dir_struct *dir)
 330{
 331        int i;
 332
 333        /* For cached/deleted files we don't need to even do the readdir */
 334        if (show_others || show_killed) {
 335                if (!show_others)
 336                        dir->flags |= DIR_COLLECT_KILLED_ONLY;
 337                fill_directory(dir, &the_index, &pathspec);
 338                if (show_others)
 339                        show_other_files(dir);
 340                if (show_killed)
 341                        show_killed_files(&the_index, dir);
 342        }
 343        if (show_cached || show_stage) {
 344                for (i = 0; i < active_nr; i++) {
 345                        const struct cache_entry *ce = active_cache[i];
 346                        if ((dir->flags & DIR_SHOW_IGNORED) &&
 347                            !ce_excluded(dir, ce))
 348                                continue;
 349                        if (show_unmerged && !ce_stage(ce))
 350                                continue;
 351                        if (ce->ce_flags & CE_UPDATE)
 352                                continue;
 353                        show_ce_entry(ce_stage(ce) ? tag_unmerged :
 354                                (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 355                }
 356        }
 357        if (show_deleted || show_modified) {
 358                for (i = 0; i < active_nr; i++) {
 359                        const struct cache_entry *ce = active_cache[i];
 360                        struct stat st;
 361                        int err;
 362                        if ((dir->flags & DIR_SHOW_IGNORED) &&
 363                            !ce_excluded(dir, ce))
 364                                continue;
 365                        if (ce->ce_flags & CE_UPDATE)
 366                                continue;
 367                        if (ce_skip_worktree(ce))
 368                                continue;
 369                        err = lstat(ce->name, &st);
 370                        if (show_deleted && err)
 371                                show_ce_entry(tag_removed, ce);
 372                        if (show_modified && ce_modified(ce, &st, 0))
 373                                show_ce_entry(tag_modified, ce);
 374                }
 375        }
 376}
 377
 378/*
 379 * Prune the index to only contain stuff starting with "prefix"
 380 */
 381static void prune_cache(const char *prefix, size_t prefixlen)
 382{
 383        int pos;
 384        unsigned int first, last;
 385
 386        if (!prefix)
 387                return;
 388        pos = cache_name_pos(prefix, prefixlen);
 389        if (pos < 0)
 390                pos = -pos-1;
 391        first = pos;
 392        last = active_nr;
 393        while (last > first) {
 394                int next = (last + first) >> 1;
 395                const struct cache_entry *ce = active_cache[next];
 396                if (!strncmp(ce->name, prefix, prefixlen)) {
 397                        first = next+1;
 398                        continue;
 399                }
 400                last = next;
 401        }
 402        memmove(active_cache, active_cache + pos,
 403                (last - pos) * sizeof(struct cache_entry *));
 404        active_nr = last - pos;
 405}
 406
 407static int get_common_prefix_len(const char *common_prefix)
 408{
 409        int common_prefix_len;
 410
 411        if (!common_prefix)
 412                return 0;
 413
 414        common_prefix_len = strlen(common_prefix);
 415
 416        /*
 417         * If the prefix has a trailing slash, strip it so that submodules wont
 418         * be pruned from the index.
 419         */
 420        if (common_prefix[common_prefix_len - 1] == '/')
 421                common_prefix_len--;
 422
 423        return common_prefix_len;
 424}
 425
 426/*
 427 * Read the tree specified with --with-tree option
 428 * (typically, HEAD) into stage #1 and then
 429 * squash them down to stage #0.  This is used for
 430 * --error-unmatch to list and check the path patterns
 431 * that were given from the command line.  We are not
 432 * going to write this index out.
 433 */
 434void overlay_tree_on_index(struct index_state *istate,
 435                           const char *tree_name, const char *prefix)
 436{
 437        struct tree *tree;
 438        struct object_id oid;
 439        struct pathspec pathspec;
 440        struct cache_entry *last_stage0 = NULL;
 441        int i;
 442
 443        if (get_oid(tree_name, &oid))
 444                die("tree-ish %s not found.", tree_name);
 445        tree = parse_tree_indirect(&oid);
 446        if (!tree)
 447                die("bad tree-ish %s", tree_name);
 448
 449        /* Hoist the unmerged entries up to stage #3 to make room */
 450        for (i = 0; i < istate->cache_nr; i++) {
 451                struct cache_entry *ce = istate->cache[i];
 452                if (!ce_stage(ce))
 453                        continue;
 454                ce->ce_flags |= CE_STAGEMASK;
 455        }
 456
 457        if (prefix) {
 458                static const char *(matchbuf[1]);
 459                matchbuf[0] = NULL;
 460                parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 461                               PATHSPEC_PREFER_CWD, prefix, matchbuf);
 462        } else
 463                memset(&pathspec, 0, sizeof(pathspec));
 464        if (read_tree(tree, 1, &pathspec, istate))
 465                die("unable to read tree entries %s", tree_name);
 466
 467        for (i = 0; i < istate->cache_nr; i++) {
 468                struct cache_entry *ce = istate->cache[i];
 469                switch (ce_stage(ce)) {
 470                case 0:
 471                        last_stage0 = ce;
 472                        /* fallthru */
 473                default:
 474                        continue;
 475                case 1:
 476                        /*
 477                         * If there is stage #0 entry for this, we do not
 478                         * need to show it.  We use CE_UPDATE bit to mark
 479                         * such an entry.
 480                         */
 481                        if (last_stage0 &&
 482                            !strcmp(last_stage0->name, ce->name))
 483                                ce->ce_flags |= CE_UPDATE;
 484                }
 485        }
 486}
 487
 488static const char * const ls_files_usage[] = {
 489        N_("git ls-files [<options>] [<file>...]"),
 490        NULL
 491};
 492
 493static int option_parse_exclude(const struct option *opt,
 494                                const char *arg, int unset)
 495{
 496        struct string_list *exclude_list = opt->value;
 497
 498        exc_given = 1;
 499        string_list_append(exclude_list, arg);
 500
 501        return 0;
 502}
 503
 504static int option_parse_exclude_from(const struct option *opt,
 505                                     const char *arg, int unset)
 506{
 507        struct dir_struct *dir = opt->value;
 508
 509        exc_given = 1;
 510        add_excludes_from_file(dir, arg);
 511
 512        return 0;
 513}
 514
 515static int option_parse_exclude_standard(const struct option *opt,
 516                                         const char *arg, int unset)
 517{
 518        struct dir_struct *dir = opt->value;
 519
 520        exc_given = 1;
 521        setup_standard_excludes(dir);
 522
 523        return 0;
 524}
 525
 526int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 527{
 528        int require_work_tree = 0, show_tag = 0, i;
 529        const char *max_prefix;
 530        struct dir_struct dir;
 531        struct exclude_list *el;
 532        struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 533        struct option builtin_ls_files_options[] = {
 534                /* Think twice before adding "--nul" synonym to this */
 535                OPT_SET_INT('z', NULL, &line_terminator,
 536                        N_("paths are separated with NUL character"), '\0'),
 537                OPT_BOOL('t', NULL, &show_tag,
 538                        N_("identify the file status with tags")),
 539                OPT_BOOL('v', NULL, &show_valid_bit,
 540                        N_("use lowercase letters for 'assume unchanged' files")),
 541                OPT_BOOL('c', "cached", &show_cached,
 542                        N_("show cached files in the output (default)")),
 543                OPT_BOOL('d', "deleted", &show_deleted,
 544                        N_("show deleted files in the output")),
 545                OPT_BOOL('m', "modified", &show_modified,
 546                        N_("show modified files in the output")),
 547                OPT_BOOL('o', "others", &show_others,
 548                        N_("show other files in the output")),
 549                OPT_BIT('i', "ignored", &dir.flags,
 550                        N_("show ignored files in the output"),
 551                        DIR_SHOW_IGNORED),
 552                OPT_BOOL('s', "stage", &show_stage,
 553                        N_("show staged contents' object name in the output")),
 554                OPT_BOOL('k', "killed", &show_killed,
 555                        N_("show files on the filesystem that need to be removed")),
 556                OPT_BIT(0, "directory", &dir.flags,
 557                        N_("show 'other' directories' names only"),
 558                        DIR_SHOW_OTHER_DIRECTORIES),
 559                OPT_BOOL(0, "eol", &show_eol, N_("show line endings of files")),
 560                OPT_NEGBIT(0, "empty-directory", &dir.flags,
 561                        N_("don't show empty directories"),
 562                        DIR_HIDE_EMPTY_DIRECTORIES),
 563                OPT_BOOL('u', "unmerged", &show_unmerged,
 564                        N_("show unmerged files in the output")),
 565                OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 566                            N_("show resolve-undo information")),
 567                { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 568                        N_("skip files matching pattern"),
 569                        0, option_parse_exclude },
 570                { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 571                        N_("exclude patterns are read from <file>"),
 572                        0, option_parse_exclude_from },
 573                OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 574                        N_("read additional per-directory exclude patterns in <file>")),
 575                { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 576                        N_("add the standard git exclusions"),
 577                        PARSE_OPT_NOARG, option_parse_exclude_standard },
 578                { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 579                        N_("make the output relative to the project top directory"),
 580                        PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 581                OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
 582                        N_("recurse through submodules")),
 583                OPT_BOOL(0, "error-unmatch", &error_unmatch,
 584                        N_("if any <file> is not in the index, treat this as an error")),
 585                OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 586                        N_("pretend that paths removed since <tree-ish> are still present")),
 587                OPT__ABBREV(&abbrev),
 588                OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 589                OPT_END()
 590        };
 591
 592        if (argc == 2 && !strcmp(argv[1], "-h"))
 593                usage_with_options(ls_files_usage, builtin_ls_files_options);
 594
 595        memset(&dir, 0, sizeof(dir));
 596        prefix = cmd_prefix;
 597        if (prefix)
 598                prefix_len = strlen(prefix);
 599        super_prefix = get_super_prefix();
 600        git_config(git_default_config, NULL);
 601
 602        if (read_cache() < 0)
 603                die("index file corrupt");
 604
 605        argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 606                        ls_files_usage, 0);
 607        el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 608        for (i = 0; i < exclude_list.nr; i++) {
 609                add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 610        }
 611        if (show_tag || show_valid_bit) {
 612                tag_cached = "H ";
 613                tag_unmerged = "M ";
 614                tag_removed = "R ";
 615                tag_modified = "C ";
 616                tag_other = "? ";
 617                tag_killed = "K ";
 618                tag_skip_worktree = "S ";
 619                tag_resolve_undo = "U ";
 620        }
 621        if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 622                require_work_tree = 1;
 623        if (show_unmerged)
 624                /*
 625                 * There's no point in showing unmerged unless
 626                 * you also show the stage information.
 627                 */
 628                show_stage = 1;
 629        if (dir.exclude_per_dir)
 630                exc_given = 1;
 631
 632        if (require_work_tree && !is_inside_work_tree())
 633                setup_work_tree();
 634
 635        if (recurse_submodules)
 636                compile_submodule_options(argv, &dir, show_tag);
 637
 638        if (recurse_submodules &&
 639            (show_stage || show_deleted || show_others || show_unmerged ||
 640             show_killed || show_modified || show_resolve_undo || with_tree))
 641                die("ls-files --recurse-submodules unsupported mode");
 642
 643        if (recurse_submodules && error_unmatch)
 644                die("ls-files --recurse-submodules does not support "
 645                    "--error-unmatch");
 646
 647        parse_pathspec(&pathspec, 0,
 648                       PATHSPEC_PREFER_CWD,
 649                       prefix, argv);
 650
 651        /*
 652         * Find common prefix for all pathspec's
 653         * This is used as a performance optimization which unfortunately cannot
 654         * be done when recursing into submodules
 655         */
 656        if (recurse_submodules)
 657                max_prefix = NULL;
 658        else
 659                max_prefix = common_prefix(&pathspec);
 660        max_prefix_len = get_common_prefix_len(max_prefix);
 661
 662        prune_cache(max_prefix, max_prefix_len);
 663
 664        /* Treat unmatching pathspec elements as errors */
 665        if (pathspec.nr && error_unmatch)
 666                ps_matched = xcalloc(pathspec.nr, 1);
 667
 668        if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 669                die("ls-files --ignored needs some exclude pattern");
 670
 671        /* With no flags, we default to showing the cached files */
 672        if (!(show_stage || show_deleted || show_others || show_unmerged ||
 673              show_killed || show_modified || show_resolve_undo))
 674                show_cached = 1;
 675
 676        if (with_tree) {
 677                /*
 678                 * Basic sanity check; show-stages and show-unmerged
 679                 * would not make any sense with this option.
 680                 */
 681                if (show_stage || show_unmerged)
 682                        die("ls-files --with-tree is incompatible with -s or -u");
 683                overlay_tree_on_index(&the_index, with_tree, max_prefix);
 684        }
 685        show_files(&dir);
 686        if (show_resolve_undo)
 687                show_ru_info();
 688
 689        if (ps_matched) {
 690                int bad;
 691                bad = report_path_error(ps_matched, &pathspec, prefix);
 692                if (bad)
 693                        fprintf(stderr, "Did you forget to 'git add'?\n");
 694
 695                return bad ? 1 : 0;
 696        }
 697
 698        return 0;
 699}