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
  18 static int abbrev;
  19 static int show_deleted;
  20 static int show_cached;
  21 static int show_others;
  22 static int show_stage;
  23 static int show_unmerged;
  24 static int show_resolve_undo;
  25 static int show_modified;
  26 static int show_killed;
  27 static int show_valid_bit;
  28 static int line_terminator = '\n';
  29 static int debug_mode;
  30
  31 static const char *prefix;
  32 static int max_prefix_len;
  33 static int prefix_len;
  34 static struct pathspec pathspec;
  35 static int error_unmatch;
  36 static char *ps_matched;
  37 static const char *with_tree;
  38 static int exc_given;
  39 static int exclude_args;
  40
  41 static const char *tag_cached = "";
  42 static const char *tag_unmerged = "";
  43 static const char *tag_removed = "";
  44 static const char *tag_other = "";
  45 static const char *tag_killed = "";
  46 static const char *tag_modified = "";
  47 static const char *tag_skip_worktree = "";
  48 static const char *tag_resolve_undo = "";
  49
  50 static void write_name(const char *name)
  51 {
  52         /*
  53          * With "--full-name", prefix_len=0; this caller needs to pass
  54          * an empty string in that case (a NULL is good for "").
  55          */
  56         write_name_quoted_relative(name, prefix_len ? prefix : NULL,
  57                                    stdout, line_terminator);
  58 }
  59
  60 static void show_dir_entry(const char *tag, struct dir_entry *ent)
  61 {
  62         int len = max_prefix_len;
  63
  64         if (len >= ent->len)
  65                 die("git ls-files: internal error - directory entry not superset of prefix");
  66
  67         if (!match_pathspec_depth(&pathspec, ent->name, ent->len, len, ps_matched))
  68                 return;
  69
  70         fputs(tag, stdout);
  71         write_name(ent->name);
  72 }
  73
  74 static void show_other_files(struct dir_struct *dir)
  75 {
  76         int i;
  77
  78         for (i = 0; i < dir->nr; i++) {
  79                 struct dir_entry *ent = dir->entries[i];
  80                 if (!cache_name_is_other(ent->name, ent->len))
  81                         continue;
  82                 show_dir_entry(tag_other, ent);
  83         }
  84 }
  85
  86 static void show_killed_files(struct dir_struct *dir)
  87 {
  88         int i;
  89         for (i = 0; i < dir->nr; i++) {
  90                 struct dir_entry *ent = dir->entries[i];
  91                 char *cp, *sp;
  92                 int pos, len, killed = 0;
  93
  94                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
  95                         sp = strchr(cp, '/');
  96                         if (!sp) {
  97                                 /* If ent->name is prefix of an entry in the
  98                                  * cache, it will be killed.
  99                                  */
 100                                 pos = cache_name_pos(ent->name, ent->len);
 101                                 if (0 <= pos)
 102                                         die("bug in show-killed-files");
 103                                 pos = -pos - 1;
 104                                 while (pos < active_nr &&
 105                                        ce_stage(active_cache[pos]))
 106                                         pos++; /* skip unmerged */
 107                                 if (active_nr <= pos)
 108                                         break;
 109                                 /* pos points at a name immediately after
 110                                  * ent->name in the cache.  Does it expect
 111                                  * ent->name to be a directory?
 112                                  */
 113                                 len = ce_namelen(active_cache[pos]);
 114                                 if ((ent->len < len) &&
 115                                     !strncmp(active_cache[pos]->name,
 116                                              ent->name, ent->len) &&
 117                                     active_cache[pos]->name[ent->len] == '/')
 118                                         killed = 1;
 119                                 break;
 120                         }
 121                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 122                                 /* If any of the leading directories in
 123                                  * ent->name is registered in the cache,
 124                                  * ent->name will be killed.
 125                                  */
 126                                 killed = 1;
 127                                 break;
 128                         }
 129                 }
 130                 if (killed)
 131                         show_dir_entry(tag_killed, dir->entries[i]);
 132         }
 133 }
 134
 135 static void show_ce_entry(const char *tag, const struct cache_entry *ce)
 136 {
 137         int len = max_prefix_len;
 138
 139         if (len >= ce_namelen(ce))
 140                 die("git ls-files: internal error - cache entry not superset of prefix");
 141
 142         if (!match_pathspec_depth(&pathspec, ce->name, ce_namelen(ce), len, ps_matched))
 143                 return;
 144
 145         if (tag && *tag && show_valid_bit &&
 146             (ce->ce_flags & CE_VALID)) {
 147                 static char alttag[4];
 148                 memcpy(alttag, tag, 3);
 149                 if (isalpha(tag[0]))
 150                         alttag[0] = tolower(tag[0]);
 151                 else if (tag[0] == '?')
 152                         alttag[0] = '!';
 153                 else {
 154                         alttag[0] = 'v';
 155                         alttag[1] = tag[0];
 156                         alttag[2] = ' ';
 157                         alttag[3] = 0;
 158                 }
 159                 tag = alttag;
 160         }
 161
 162         if (!show_stage) {
 163                 fputs(tag, stdout);
 164         } else {
 165                 printf("%s%06o %s %d\t",
 166                        tag,
 167                        ce->ce_mode,
 168                        find_unique_abbrev(ce->sha1,abbrev),
 169                        ce_stage(ce));
 170         }
 171         write_name(ce->name);
 172         if (debug_mode) {
 173                 const struct stat_data *sd = &ce->ce_stat_data;
 174
 175                 printf("  ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 176                 printf("  mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 177                 printf("  dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
 178                 printf("  uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
 179                 printf("  size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
 180         }
 181 }
 182
 183 static void show_ru_info(void)
 184 {
 185         struct string_list_item *item;
 186
 187         if (!the_index.resolve_undo)
 188                 return;
 189
 190         for_each_string_list_item(item, the_index.resolve_undo) {
 191                 const char *path = item->string;
 192                 struct resolve_undo_info *ui = item->util;
 193                 int i, len;
 194
 195                 len = strlen(path);
 196                 if (len < max_prefix_len)
 197                         continue; /* outside of the prefix */
 198                 if (!match_pathspec_depth(&pathspec, path, len, max_prefix_len, ps_matched))
 199                         continue; /* uninterested */
 200                 for (i = 0; i < 3; i++) {
 201                         if (!ui->mode[i])
 202                                 continue;
 203                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 204                                find_unique_abbrev(ui->sha1[i], abbrev),
 205                                i + 1);
 206                         write_name(path);
 207                 }
 208         }
 209 }
 210
 211 static int ce_excluded(struct dir_struct *dir, const struct cache_entry *ce)
 212 {
 213         int dtype = ce_to_dtype(ce);
 214         return is_excluded(dir, ce->name, &dtype);
 215 }
 216
 217 static void show_files(struct dir_struct *dir)
 218 {
 219         int i;
 220
 221         /* For cached/deleted files we don't need to even do the readdir */
 222         if (show_others || show_killed) {
 223                 if (!show_others)
 224                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 225                 fill_directory(dir, &pathspec);
 226                 if (show_others)
 227                         show_other_files(dir);
 228                 if (show_killed)
 229                         show_killed_files(dir);
 230         }
 231         if (show_cached || show_stage) {
 232                 for (i = 0; i < active_nr; i++) {
 233                         const struct cache_entry *ce = active_cache[i];
 234                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 235                             !ce_excluded(dir, ce))
 236                                 continue;
 237                         if (show_unmerged && !ce_stage(ce))
 238                                 continue;
 239                         if (ce->ce_flags & CE_UPDATE)
 240                                 continue;
 241                         show_ce_entry(ce_stage(ce) ? tag_unmerged :
 242                                 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 243                 }
 244         }
 245         if (show_deleted || show_modified) {
 246                 for (i = 0; i < active_nr; i++) {
 247                         const struct cache_entry *ce = active_cache[i];
 248                         struct stat st;
 249                         int err;
 250                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 251                             !ce_excluded(dir, ce))
 252                                 continue;
 253                         if (ce->ce_flags & CE_UPDATE)
 254                                 continue;
 255                         if (ce_skip_worktree(ce))
 256                                 continue;
 257                         err = lstat(ce->name, &st);
 258                         if (show_deleted && err)
 259                                 show_ce_entry(tag_removed, ce);
 260                         if (show_modified && ce_modified(ce, &st, 0))
 261                                 show_ce_entry(tag_modified, ce);
 262                 }
 263         }
 264 }
 265
 266 /*
 267  * Prune the index to only contain stuff starting with "prefix"
 268  */
 269 static void prune_cache(const char *prefix)
 270 {
 271         int pos = cache_name_pos(prefix, max_prefix_len);
 272         unsigned int first, last;
 273
 274         if (pos < 0)
 275                 pos = -pos-1;
 276         memmove(active_cache, active_cache + pos,
 277                 (active_nr - pos) * sizeof(struct cache_entry *));
 278         active_nr -= pos;
 279         first = 0;
 280         last = active_nr;
 281         while (last > first) {
 282                 int next = (last + first) >> 1;
 283                 const struct cache_entry *ce = active_cache[next];
 284                 if (!strncmp(ce->name, prefix, max_prefix_len)) {
 285                         first = next+1;
 286                         continue;
 287                 }
 288                 last = next;
 289         }
 290         active_nr = last;
 291 }
 292
 293 /*
 294  * Read the tree specified with --with-tree option
 295  * (typically, HEAD) into stage #1 and then
 296  * squash them down to stage #0.  This is used for
 297  * --error-unmatch to list and check the path patterns
 298  * that were given from the command line.  We are not
 299  * going to write this index out.
 300  */
 301 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
 302 {
 303         struct tree *tree;
 304         unsigned char sha1[20];
 305         struct pathspec pathspec;
 306         struct cache_entry *last_stage0 = NULL;
 307         int i;
 308
 309         if (get_sha1(tree_name, sha1))
 310                 die("tree-ish %s not found.", tree_name);
 311         tree = parse_tree_indirect(sha1);
 312         if (!tree)
 313                 die("bad tree-ish %s", tree_name);
 314
 315         /* Hoist the unmerged entries up to stage #3 to make room */
 316         for (i = 0; i < active_nr; i++) {
 317                 struct cache_entry *ce = active_cache[i];
 318                 if (!ce_stage(ce))
 319                         continue;
 320                 ce->ce_flags |= CE_STAGEMASK;
 321         }
 322
 323         if (prefix) {
 324                 static const char *(matchbuf[1]);
 325                 matchbuf[0] = NULL;
 326                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 327                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 328         } else
 329                 memset(&pathspec, 0, sizeof(pathspec));
 330         if (read_tree(tree, 1, &pathspec))
 331                 die("unable to read tree entries %s", tree_name);
 332
 333         for (i = 0; i < active_nr; i++) {
 334                 struct cache_entry *ce = active_cache[i];
 335                 switch (ce_stage(ce)) {
 336                 case 0:
 337                         last_stage0 = ce;
 338                         /* fallthru */
 339                 default:
 340                         continue;
 341                 case 1:
 342                         /*
 343                          * If there is stage #0 entry for this, we do not
 344                          * need to show it.  We use CE_UPDATE bit to mark
 345                          * such an entry.
 346                          */
 347                         if (last_stage0 &&
 348                             !strcmp(last_stage0->name, ce->name))
 349                                 ce->ce_flags |= CE_UPDATE;
 350                 }
 351         }
 352 }
 353
 354 int report_path_error(const char *ps_matched,
 355                       const struct pathspec *pathspec,
 356                       const char *prefix)
 357 {
 358         /*
 359          * Make sure all pathspec matched; otherwise it is an error.
 360          */
 361         struct strbuf sb = STRBUF_INIT;
 362         int num, errors = 0;
 363         for (num = 0; num < pathspec->nr; num++) {
 364                 int other, found_dup;
 365
 366                 if (ps_matched[num])
 367                         continue;
 368                 /*
 369                  * The caller might have fed identical pathspec
 370                  * twice.  Do not barf on such a mistake.
 371                  * FIXME: parse_pathspec should have eliminated
 372                  * duplicate pathspec.
 373                  */
 374                 for (found_dup = other = 0;
 375                      !found_dup && other < pathspec->nr;
 376                      other++) {
 377                         if (other == num || !ps_matched[other])
 378                                 continue;
 379                         if (!strcmp(pathspec->items[other].original,
 380                                     pathspec->items[num].original))
 381                                 /*
 382                                  * Ok, we have a match already.
 383                                  */
 384                                 found_dup = 1;
 385                 }
 386                 if (found_dup)
 387                         continue;
 388
 389                 error("pathspec '%s' did not match any file(s) known to git.",
 390                       pathspec->items[num].original);
 391                 errors++;
 392         }
 393         strbuf_release(&sb);
 394         return errors;
 395 }
 396
 397 static const char * const ls_files_usage[] = {
 398         N_("git ls-files [options] [<file>...]"),
 399         NULL
 400 };
 401
 402 static int option_parse_z(const struct option *opt,
 403                           const char *arg, int unset)
 404 {
 405         line_terminator = unset ? '\n' : '\0';
 406
 407         return 0;
 408 }
 409
 410 static int option_parse_exclude(const struct option *opt,
 411                                 const char *arg, int unset)
 412 {
 413         struct string_list *exclude_list = opt->value;
 414
 415         exc_given = 1;
 416         string_list_append(exclude_list, arg);
 417
 418         return 0;
 419 }
 420
 421 static int option_parse_exclude_from(const struct option *opt,
 422                                      const char *arg, int unset)
 423 {
 424         struct dir_struct *dir = opt->value;
 425
 426         exc_given = 1;
 427         add_excludes_from_file(dir, arg);
 428
 429         return 0;
 430 }
 431
 432 static int option_parse_exclude_standard(const struct option *opt,
 433                                          const char *arg, int unset)
 434 {
 435         struct dir_struct *dir = opt->value;
 436
 437         exc_given = 1;
 438         setup_standard_excludes(dir);
 439
 440         return 0;
 441 }
 442
 443 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 444 {
 445         int require_work_tree = 0, show_tag = 0, i;
 446         const char *max_prefix;
 447         struct dir_struct dir;
 448         struct exclude_list *el;
 449         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 450         struct option builtin_ls_files_options[] = {
 451                 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 452                         N_("paths are separated with NUL character"),
 453                         PARSE_OPT_NOARG, option_parse_z },
 454                 OPT_BOOL('t', NULL, &show_tag,
 455                         N_("identify the file status with tags")),
 456                 OPT_BOOL('v', NULL, &show_valid_bit,
 457                         N_("use lowercase letters for 'assume unchanged' files")),
 458                 OPT_BOOL('c', "cached", &show_cached,
 459                         N_("show cached files in the output (default)")),
 460                 OPT_BOOL('d', "deleted", &show_deleted,
 461                         N_("show deleted files in the output")),
 462                 OPT_BOOL('m', "modified", &show_modified,
 463                         N_("show modified files in the output")),
 464                 OPT_BOOL('o', "others", &show_others,
 465                         N_("show other files in the output")),
 466                 OPT_BIT('i', "ignored", &dir.flags,
 467                         N_("show ignored files in the output"),
 468                         DIR_SHOW_IGNORED),
 469                 OPT_BOOL('s', "stage", &show_stage,
 470                         N_("show staged contents' object name in the output")),
 471                 OPT_BOOL('k', "killed", &show_killed,
 472                         N_("show files on the filesystem that need to be removed")),
 473                 OPT_BIT(0, "directory", &dir.flags,
 474                         N_("show 'other' directories' name only"),
 475                         DIR_SHOW_OTHER_DIRECTORIES),
 476                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 477                         N_("don't show empty directories"),
 478                         DIR_HIDE_EMPTY_DIRECTORIES),
 479                 OPT_BOOL('u', "unmerged", &show_unmerged,
 480                         N_("show unmerged files in the output")),
 481                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 482                             N_("show resolve-undo information")),
 483                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 484                         N_("skip files matching pattern"),
 485                         0, option_parse_exclude },
 486                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 487                         N_("exclude patterns are read from <file>"),
 488                         0, option_parse_exclude_from },
 489                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 490                         N_("read additional per-directory exclude patterns in <file>")),
 491                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 492                         N_("add the standard git exclusions"),
 493                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 494                 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 495                         N_("make the output relative to the project top directory"),
 496                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 497                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 498                         N_("if any <file> is not in the index, treat this as an error")),
 499                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 500                         N_("pretend that paths removed since <tree-ish> are still present")),
 501                 OPT__ABBREV(&abbrev),
 502                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 503                 OPT_END()
 504         };
 505
 506         if (argc == 2 && !strcmp(argv[1], "-h"))
 507                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 508
 509         memset(&dir, 0, sizeof(dir));
 510         prefix = cmd_prefix;
 511         if (prefix)
 512                 prefix_len = strlen(prefix);
 513         git_config(git_default_config, NULL);
 514
 515         if (read_cache() < 0)
 516                 die("index file corrupt");
 517
 518         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 519                         ls_files_usage, 0);
 520         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 521         for (i = 0; i < exclude_list.nr; i++) {
 522                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 523         }
 524         if (show_tag || show_valid_bit) {
 525                 tag_cached = "H ";
 526                 tag_unmerged = "M ";
 527                 tag_removed = "R ";
 528                 tag_modified = "C ";
 529                 tag_other = "? ";
 530                 tag_killed = "K ";
 531                 tag_skip_worktree = "S ";
 532                 tag_resolve_undo = "U ";
 533         }
 534         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 535                 require_work_tree = 1;
 536         if (show_unmerged)
 537                 /*
 538                  * There's no point in showing unmerged unless
 539                  * you also show the stage information.
 540                  */
 541                 show_stage = 1;
 542         if (dir.exclude_per_dir)
 543                 exc_given = 1;
 544
 545         if (require_work_tree && !is_inside_work_tree())
 546                 setup_work_tree();
 547
 548         parse_pathspec(&pathspec, 0,
 549                        PATHSPEC_PREFER_CWD |
 550                        PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
 551                        prefix, argv);
 552
 553         /* Find common prefix for all pathspec's */
 554         max_prefix = common_prefix(&pathspec);
 555         max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
 556
 557         /* Treat unmatching pathspec elements as errors */
 558         if (pathspec.nr && error_unmatch)
 559                 ps_matched = xcalloc(1, pathspec.nr);
 560
 561         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 562                 die("ls-files --ignored needs some exclude pattern");
 563
 564         /* With no flags, we default to showing the cached files */
 565         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 566               show_killed || show_modified || show_resolve_undo))
 567                 show_cached = 1;
 568
 569         if (max_prefix)
 570                 prune_cache(max_prefix);
 571         if (with_tree) {
 572                 /*
 573                  * Basic sanity check; show-stages and show-unmerged
 574                  * would not make any sense with this option.
 575                  */
 576                 if (show_stage || show_unmerged)
 577                         die("ls-files --with-tree is incompatible with -s or -u");
 578                 overlay_tree_on_cache(with_tree, max_prefix);
 579         }
 580         show_files(&dir);
 581         if (show_resolve_undo)
 582                 show_ru_info();
 583
 584         if (ps_matched) {
 585                 int bad;
 586                 bad = report_path_error(ps_matched, &pathspec, prefix);
 587                 if (bad)
 588                         fprintf(stderr, "Did you forget to 'git add'?\n");
 589
 590                 return bad ? 1 : 0;
 591         }
 592
 593         return 0;
 594 }