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
  14 static int abbrev;
  15 static int show_deleted;
  16 static int show_cached;
  17 static int show_others;
  18 static int show_stage;
  19 static int show_unmerged;
  20 static int show_modified;
  21 static int show_killed;
  22 static int show_valid_bit;
  23 static int line_terminator = '\n';
  24
  25 static int prefix_len;
  26 static int prefix_offset;
  27 static const char **pathspec;
  28 static int error_unmatch;
  29 static char *ps_matched;
  30 static const char *with_tree;
  31
  32 static const char *tag_cached = "";
  33 static const char *tag_unmerged = "";
  34 static const char *tag_removed = "";
  35 static const char *tag_other = "";
  36 static const char *tag_killed = "";
  37 static const char *tag_modified = "";
  38
  39 static void show_dir_entry(const char *tag, struct dir_entry *ent)
  40 {
  41         int len = prefix_len;
  42         int offset = prefix_offset;
  43
  44         if (len >= ent->len)
  45                 die("git ls-files: internal error - directory entry not superset of prefix");
  46
  47         if (!match_pathspec(pathspec, ent->name, ent->len, len, ps_matched))
  48                 return;
  49
  50         fputs(tag, stdout);
  51         write_name_quoted(ent->name + offset, stdout, line_terminator);
  52 }
  53
  54 static void show_other_files(struct dir_struct *dir)
  55 {
  56         int i;
  57
  58         for (i = 0; i < dir->nr; i++) {
  59                 struct dir_entry *ent = dir->entries[i];
  60                 if (!cache_name_is_other(ent->name, ent->len))
  61                         continue;
  62                 show_dir_entry(tag_other, ent);
  63         }
  64 }
  65
  66 static void show_killed_files(struct dir_struct *dir)
  67 {
  68         int i;
  69         for (i = 0; i < dir->nr; i++) {
  70                 struct dir_entry *ent = dir->entries[i];
  71                 char *cp, *sp;
  72                 int pos, len, killed = 0;
  73
  74                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
  75                         sp = strchr(cp, '/');
  76                         if (!sp) {
  77                                 /* If ent->name is prefix of an entry in the
  78                                  * cache, it will be killed.
  79                                  */
  80                                 pos = cache_name_pos(ent->name, ent->len);
  81                                 if (0 <= pos)
  82                                         die("bug in show-killed-files");
  83                                 pos = -pos - 1;
  84                                 while (pos < active_nr &&
  85                                        ce_stage(active_cache[pos]))
  86                                         pos++; /* skip unmerged */
  87                                 if (active_nr <= pos)
  88                                         break;
  89                                 /* pos points at a name immediately after
  90                                  * ent->name in the cache.  Does it expect
  91                                  * ent->name to be a directory?
  92                                  */
  93                                 len = ce_namelen(active_cache[pos]);
  94                                 if ((ent->len < len) &&
  95                                     !strncmp(active_cache[pos]->name,
  96                                              ent->name, ent->len) &&
  97                                     active_cache[pos]->name[ent->len] == '/')
  98                                         killed = 1;
  99                                 break;
 100                         }
 101                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 102                                 /* If any of the leading directories in
 103                                  * ent->name is registered in the cache,
 104                                  * ent->name will be killed.
 105                                  */
 106                                 killed = 1;
 107                                 break;
 108                         }
 109                 }
 110                 if (killed)
 111                         show_dir_entry(tag_killed, dir->entries[i]);
 112         }
 113 }
 114
 115 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 116 {
 117         int len = prefix_len;
 118         int offset = prefix_offset;
 119
 120         if (len >= ce_namelen(ce))
 121                 die("git ls-files: internal error - cache entry not superset of prefix");
 122
 123         if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), len, ps_matched))
 124                 return;
 125
 126         if (tag && *tag && show_valid_bit &&
 127             (ce->ce_flags & CE_VALID)) {
 128                 static char alttag[4];
 129                 memcpy(alttag, tag, 3);
 130                 if (isalpha(tag[0]))
 131                         alttag[0] = tolower(tag[0]);
 132                 else if (tag[0] == '?')
 133                         alttag[0] = '!';
 134                 else {
 135                         alttag[0] = 'v';
 136                         alttag[1] = tag[0];
 137                         alttag[2] = ' ';
 138                         alttag[3] = 0;
 139                 }
 140                 tag = alttag;
 141         }
 142
 143         if (!show_stage) {
 144                 fputs(tag, stdout);
 145         } else {
 146                 printf("%s%06o %s %d\t",
 147                        tag,
 148                        ce->ce_mode,
 149                        abbrev ? find_unique_abbrev(ce->sha1,abbrev)
 150                                 : sha1_to_hex(ce->sha1),
 151                        ce_stage(ce));
 152         }
 153         write_name_quoted(ce->name + offset, stdout, line_terminator);
 154 }
 155
 156 static void show_files(struct dir_struct *dir, const char *prefix)
 157 {
 158         int i;
 159
 160         /* For cached/deleted files we don't need to even do the readdir */
 161         if (show_others || show_killed) {
 162                 const char *path = ".", *base = "";
 163                 int baselen = prefix_len;
 164
 165                 if (baselen)
 166                         path = base = prefix;
 167                 read_directory(dir, path, base, baselen, pathspec);
 168                 if (show_others)
 169                         show_other_files(dir);
 170                 if (show_killed)
 171                         show_killed_files(dir);
 172         }
 173         if (show_cached | show_stage) {
 174                 for (i = 0; i < active_nr; i++) {
 175                         struct cache_entry *ce = active_cache[i];
 176                         int dtype = ce_to_dtype(ce);
 177                         if (excluded(dir, ce->name, &dtype) != dir->show_ignored)
 178                                 continue;
 179                         if (show_unmerged && !ce_stage(ce))
 180                                 continue;
 181                         if (ce->ce_flags & CE_UPDATE)
 182                                 continue;
 183                         show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
 184                 }
 185         }
 186         if (show_deleted | show_modified) {
 187                 for (i = 0; i < active_nr; i++) {
 188                         struct cache_entry *ce = active_cache[i];
 189                         struct stat st;
 190                         int err;
 191                         int dtype = ce_to_dtype(ce);
 192                         if (excluded(dir, ce->name, &dtype) != dir->show_ignored)
 193                                 continue;
 194                         if (ce->ce_flags & CE_UPDATE)
 195                                 continue;
 196                         err = lstat(ce->name, &st);
 197                         if (show_deleted && err)
 198                                 show_ce_entry(tag_removed, ce);
 199                         if (show_modified && ce_modified(ce, &st, 0))
 200                                 show_ce_entry(tag_modified, ce);
 201                 }
 202         }
 203 }
 204
 205 /*
 206  * Prune the index to only contain stuff starting with "prefix"
 207  */
 208 static void prune_cache(const char *prefix)
 209 {
 210         int pos = cache_name_pos(prefix, prefix_len);
 211         unsigned int first, last;
 212
 213         if (pos < 0)
 214                 pos = -pos-1;
 215         memmove(active_cache, active_cache + pos,
 216                 (active_nr - pos) * sizeof(struct cache_entry *));
 217         active_nr -= pos;
 218         first = 0;
 219         last = active_nr;
 220         while (last > first) {
 221                 int next = (last + first) >> 1;
 222                 struct cache_entry *ce = active_cache[next];
 223                 if (!strncmp(ce->name, prefix, prefix_len)) {
 224                         first = next+1;
 225                         continue;
 226                 }
 227                 last = next;
 228         }
 229         active_nr = last;
 230 }
 231
 232 static const char *verify_pathspec(const char *prefix)
 233 {
 234         const char **p, *n, *prev;
 235         unsigned long max;
 236
 237         prev = NULL;
 238         max = PATH_MAX;
 239         for (p = pathspec; (n = *p) != NULL; p++) {
 240                 int i, len = 0;
 241                 for (i = 0; i < max; i++) {
 242                         char c = n[i];
 243                         if (prev && prev[i] != c)
 244                                 break;
 245                         if (!c || c == '*' || c == '?')
 246                                 break;
 247                         if (c == '/')
 248                                 len = i+1;
 249                 }
 250                 prev = n;
 251                 if (len < max) {
 252                         max = len;
 253                         if (!max)
 254                                 break;
 255                 }
 256         }
 257
 258         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 259                 die("git ls-files: cannot generate relative filenames containing '..'");
 260
 261         prefix_len = max;
 262         return max ? xmemdupz(prev, max) : NULL;
 263 }
 264
 265 static void strip_trailing_slash_from_submodules(void)
 266 {
 267         const char **p;
 268
 269         for (p = pathspec; *p != NULL; p++) {
 270                 int len = strlen(*p), pos;
 271
 272                 if (len < 1 || (*p)[len - 1] != '/')
 273                         continue;
 274                 pos = cache_name_pos(*p, len - 1);
 275                 if (pos >= 0 && S_ISGITLINK(active_cache[pos]->ce_mode))
 276                         *p = xstrndup(*p, len - 1);
 277         }
 278 }
 279
 280 /*
 281  * Read the tree specified with --with-tree option
 282  * (typically, HEAD) into stage #1 and then
 283  * squash them down to stage #0.  This is used for
 284  * --error-unmatch to list and check the path patterns
 285  * that were given from the command line.  We are not
 286  * going to write this index out.
 287  */
 288 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
 289 {
 290         struct tree *tree;
 291         unsigned char sha1[20];
 292         const char **match;
 293         struct cache_entry *last_stage0 = NULL;
 294         int i;
 295
 296         if (get_sha1(tree_name, sha1))
 297                 die("tree-ish %s not found.", tree_name);
 298         tree = parse_tree_indirect(sha1);
 299         if (!tree)
 300                 die("bad tree-ish %s", tree_name);
 301
 302         /* Hoist the unmerged entries up to stage #3 to make room */
 303         for (i = 0; i < active_nr; i++) {
 304                 struct cache_entry *ce = active_cache[i];
 305                 if (!ce_stage(ce))
 306                         continue;
 307                 ce->ce_flags |= CE_STAGEMASK;
 308         }
 309
 310         if (prefix) {
 311                 static const char *(matchbuf[2]);
 312                 matchbuf[0] = prefix;
 313                 matchbuf[1] = NULL;
 314                 match = matchbuf;
 315         } else
 316                 match = NULL;
 317         if (read_tree(tree, 1, match))
 318                 die("unable to read tree entries %s", tree_name);
 319
 320         for (i = 0; i < active_nr; i++) {
 321                 struct cache_entry *ce = active_cache[i];
 322                 switch (ce_stage(ce)) {
 323                 case 0:
 324                         last_stage0 = ce;
 325                         /* fallthru */
 326                 default:
 327                         continue;
 328                 case 1:
 329                         /*
 330                          * If there is stage #0 entry for this, we do not
 331                          * need to show it.  We use CE_UPDATE bit to mark
 332                          * such an entry.
 333                          */
 334                         if (last_stage0 &&
 335                             !strcmp(last_stage0->name, ce->name))
 336                                 ce->ce_flags |= CE_UPDATE;
 337                 }
 338         }
 339 }
 340
 341 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset)
 342 {
 343         /*
 344          * Make sure all pathspec matched; otherwise it is an error.
 345          */
 346         int num, errors = 0;
 347         for (num = 0; pathspec[num]; num++) {
 348                 int other, found_dup;
 349
 350                 if (ps_matched[num])
 351                         continue;
 352                 /*
 353                  * The caller might have fed identical pathspec
 354                  * twice.  Do not barf on such a mistake.
 355                  */
 356                 for (found_dup = other = 0;
 357                      !found_dup && pathspec[other];
 358                      other++) {
 359                         if (other == num || !ps_matched[other])
 360                                 continue;
 361                         if (!strcmp(pathspec[other], pathspec[num]))
 362                                 /*
 363                                  * Ok, we have a match already.
 364                                  */
 365                                 found_dup = 1;
 366                 }
 367                 if (found_dup)
 368                         continue;
 369
 370                 error("pathspec '%s' did not match any file(s) known to git.",
 371                       pathspec[num] + prefix_offset);
 372                 errors++;
 373         }
 374         return errors;
 375 }
 376
 377 static const char ls_files_usage[] =
 378         "git ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 379         "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
 380         "[ --exclude-per-directory=<filename> ] [--exclude-standard] "
 381         "[--full-name] [--abbrev] [--] [<file>]*";
 382
 383 int cmd_ls_files(int argc, const char **argv, const char *prefix)
 384 {
 385         int i;
 386         int exc_given = 0, require_work_tree = 0;
 387         struct dir_struct dir;
 388
 389         memset(&dir, 0, sizeof(dir));
 390         if (prefix)
 391                 prefix_offset = strlen(prefix);
 392         git_config(git_default_config, NULL);
 393
 394         for (i = 1; i < argc; i++) {
 395                 const char *arg = argv[i];
 396
 397                 if (!strcmp(arg, "--")) {
 398                         i++;
 399                         break;
 400                 }
 401                 if (!strcmp(arg, "-z")) {
 402                         line_terminator = 0;
 403                         continue;
 404                 }
 405                 if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
 406                         tag_cached = "H ";
 407                         tag_unmerged = "M ";
 408                         tag_removed = "R ";
 409                         tag_modified = "C ";
 410                         tag_other = "? ";
 411                         tag_killed = "K ";
 412                         if (arg[1] == 'v')
 413                                 show_valid_bit = 1;
 414                         continue;
 415                 }
 416                 if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 417                         show_cached = 1;
 418                         continue;
 419                 }
 420                 if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 421                         show_deleted = 1;
 422                         continue;
 423                 }
 424                 if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
 425                         show_modified = 1;
 426                         require_work_tree = 1;
 427                         continue;
 428                 }
 429                 if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 430                         show_others = 1;
 431                         require_work_tree = 1;
 432                         continue;
 433                 }
 434                 if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 435                         dir.show_ignored = 1;
 436                         require_work_tree = 1;
 437                         continue;
 438                 }
 439                 if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 440                         show_stage = 1;
 441                         continue;
 442                 }
 443                 if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 444                         show_killed = 1;
 445                         require_work_tree = 1;
 446                         continue;
 447                 }
 448                 if (!strcmp(arg, "--directory")) {
 449                         dir.show_other_directories = 1;
 450                         continue;
 451                 }
 452                 if (!strcmp(arg, "--no-empty-directory")) {
 453                         dir.hide_empty_directories = 1;
 454                         continue;
 455                 }
 456                 if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 457                         /* There's no point in showing unmerged unless
 458                          * you also show the stage information.
 459                          */
 460                         show_stage = 1;
 461                         show_unmerged = 1;
 462                         continue;
 463                 }
 464                 if (!strcmp(arg, "-x") && i+1 < argc) {
 465                         exc_given = 1;
 466                         add_exclude(argv[++i], "", 0, &dir.exclude_list[EXC_CMDL]);
 467                         continue;
 468                 }
 469                 if (!prefixcmp(arg, "--exclude=")) {
 470                         exc_given = 1;
 471                         add_exclude(arg+10, "", 0, &dir.exclude_list[EXC_CMDL]);
 472                         continue;
 473                 }
 474                 if (!strcmp(arg, "-X") && i+1 < argc) {
 475                         exc_given = 1;
 476                         add_excludes_from_file(&dir, argv[++i]);
 477                         continue;
 478                 }
 479                 if (!prefixcmp(arg, "--exclude-from=")) {
 480                         exc_given = 1;
 481                         add_excludes_from_file(&dir, arg+15);
 482                         continue;
 483                 }
 484                 if (!prefixcmp(arg, "--exclude-per-directory=")) {
 485                         exc_given = 1;
 486                         dir.exclude_per_dir = arg + 24;
 487                         continue;
 488                 }
 489                 if (!strcmp(arg, "--exclude-standard")) {
 490                         exc_given = 1;
 491                         setup_standard_excludes(&dir);
 492                         continue;
 493                 }
 494                 if (!strcmp(arg, "--full-name")) {
 495                         prefix_offset = 0;
 496                         continue;
 497                 }
 498                 if (!strcmp(arg, "--error-unmatch")) {
 499                         error_unmatch = 1;
 500                         continue;
 501                 }
 502                 if (!prefixcmp(arg, "--with-tree=")) {
 503                         with_tree = arg + 12;
 504                         continue;
 505                 }
 506                 if (!prefixcmp(arg, "--abbrev=")) {
 507                         abbrev = strtoul(arg+9, NULL, 10);
 508                         if (abbrev && abbrev < MINIMUM_ABBREV)
 509                                 abbrev = MINIMUM_ABBREV;
 510                         else if (abbrev > 40)
 511                                 abbrev = 40;
 512                         continue;
 513                 }
 514                 if (!strcmp(arg, "--abbrev")) {
 515                         abbrev = DEFAULT_ABBREV;
 516                         continue;
 517                 }
 518                 if (*arg == '-')
 519                         usage(ls_files_usage);
 520                 break;
 521         }
 522
 523         if (require_work_tree && !is_inside_work_tree())
 524                 setup_work_tree();
 525
 526         pathspec = get_pathspec(prefix, argv + i);
 527
 528         /* be nice with submodule patsh ending in a slash */
 529         read_cache();
 530         if (pathspec)
 531                 strip_trailing_slash_from_submodules();
 532
 533         /* Verify that the pathspec matches the prefix */
 534         if (pathspec)
 535                 prefix = verify_pathspec(prefix);
 536
 537         /* Treat unmatching pathspec elements as errors */
 538         if (pathspec && error_unmatch) {
 539                 int num;
 540                 for (num = 0; pathspec[num]; num++)
 541                         ;
 542                 ps_matched = xcalloc(1, num);
 543         }
 544
 545         if (dir.show_ignored && !exc_given) {
 546                 fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 547                         argv[0]);
 548                 exit(1);
 549         }
 550
 551         /* With no flags, we default to showing the cached files */
 552         if (!(show_stage | show_deleted | show_others | show_unmerged |
 553               show_killed | show_modified))
 554                 show_cached = 1;
 555
 556         if (prefix)
 557                 prune_cache(prefix);
 558         if (with_tree) {
 559                 /*
 560                  * Basic sanity check; show-stages and show-unmerged
 561                  * would not make any sense with this option.
 562                  */
 563                 if (show_stage || show_unmerged)
 564                         die("ls-files --with-tree is incompatible with -s or -u");
 565                 overlay_tree_on_cache(with_tree, prefix);
 566         }
 567         show_files(&dir, prefix);
 568
 569         if (ps_matched) {
 570                 int bad;
 571                 bad = report_path_error(ps_matched, pathspec, prefix_offset);
 572                 if (bad)
 573                         fprintf(stderr, "Did you forget to 'git add'?\n");
 574
 575                 return bad ? 1 : 0;
 576         }
 577
 578         return 0;
 579 }