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
  17 static int abbrev;
  18 static int show_deleted;
  19 static int show_cached;
  20 static int show_others;
  21 static int show_stage;
  22 static int show_unmerged;
  23 static int show_resolve_undo;
  24 static int show_modified;
  25 static int show_killed;
  26 static int show_valid_bit;
  27 static int line_terminator = '\n';
  28
  29 static int prefix_len;
  30 static int prefix_offset;
  31 static const char **pathspec;
  32 static int error_unmatch;
  33 static char *ps_matched;
  34 static const char *with_tree;
  35 static int exc_given;
  36
  37 static const char *tag_cached = "";
  38 static const char *tag_unmerged = "";
  39 static const char *tag_removed = "";
  40 static const char *tag_other = "";
  41 static const char *tag_killed = "";
  42 static const char *tag_modified = "";
  43 static const char *tag_skip_worktree = "";
  44 static const char *tag_resolve_undo = "";
  45
  46 static void show_dir_entry(const char *tag, struct dir_entry *ent)
  47 {
  48         int len = prefix_len;
  49         int offset = prefix_offset;
  50
  51         if (len >= ent->len)
  52                 die("git ls-files: internal error - directory entry not superset of prefix");
  53
  54         if (!match_pathspec(pathspec, ent->name, ent->len, len, ps_matched))
  55                 return;
  56
  57         fputs(tag, stdout);
  58         write_name_quoted(ent->name + offset, stdout, line_terminator);
  59 }
  60
  61 static void show_other_files(struct dir_struct *dir)
  62 {
  63         int i;
  64
  65         for (i = 0; i < dir->nr; i++) {
  66                 struct dir_entry *ent = dir->entries[i];
  67                 if (!cache_name_is_other(ent->name, ent->len))
  68                         continue;
  69                 show_dir_entry(tag_other, ent);
  70         }
  71 }
  72
  73 static void show_killed_files(struct dir_struct *dir)
  74 {
  75         int i;
  76         for (i = 0; i < dir->nr; i++) {
  77                 struct dir_entry *ent = dir->entries[i];
  78                 char *cp, *sp;
  79                 int pos, len, killed = 0;
  80
  81                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
  82                         sp = strchr(cp, '/');
  83                         if (!sp) {
  84                                 /* If ent->name is prefix of an entry in the
  85                                  * cache, it will be killed.
  86                                  */
  87                                 pos = cache_name_pos(ent->name, ent->len);
  88                                 if (0 <= pos)
  89                                         die("bug in show-killed-files");
  90                                 pos = -pos - 1;
  91                                 while (pos < active_nr &&
  92                                        ce_stage(active_cache[pos]))
  93                                         pos++; /* skip unmerged */
  94                                 if (active_nr <= pos)
  95                                         break;
  96                                 /* pos points at a name immediately after
  97                                  * ent->name in the cache.  Does it expect
  98                                  * ent->name to be a directory?
  99                                  */
 100                                 len = ce_namelen(active_cache[pos]);
 101                                 if ((ent->len < len) &&
 102                                     !strncmp(active_cache[pos]->name,
 103                                              ent->name, ent->len) &&
 104                                     active_cache[pos]->name[ent->len] == '/')
 105                                         killed = 1;
 106                                 break;
 107                         }
 108                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 109                                 /* If any of the leading directories in
 110                                  * ent->name is registered in the cache,
 111                                  * ent->name will be killed.
 112                                  */
 113                                 killed = 1;
 114                                 break;
 115                         }
 116                 }
 117                 if (killed)
 118                         show_dir_entry(tag_killed, dir->entries[i]);
 119         }
 120 }
 121
 122 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 123 {
 124         int len = prefix_len;
 125         int offset = prefix_offset;
 126
 127         if (len >= ce_namelen(ce))
 128                 die("git ls-files: internal error - cache entry not superset of prefix");
 129
 130         if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), len, ps_matched))
 131                 return;
 132
 133         if (tag && *tag && show_valid_bit &&
 134             (ce->ce_flags & CE_VALID)) {
 135                 static char alttag[4];
 136                 memcpy(alttag, tag, 3);
 137                 if (isalpha(tag[0]))
 138                         alttag[0] = tolower(tag[0]);
 139                 else if (tag[0] == '?')
 140                         alttag[0] = '!';
 141                 else {
 142                         alttag[0] = 'v';
 143                         alttag[1] = tag[0];
 144                         alttag[2] = ' ';
 145                         alttag[3] = 0;
 146                 }
 147                 tag = alttag;
 148         }
 149
 150         if (!show_stage) {
 151                 fputs(tag, stdout);
 152         } else {
 153                 printf("%s%06o %s %d\t",
 154                        tag,
 155                        ce->ce_mode,
 156                        find_unique_abbrev(ce->sha1,abbrev),
 157                        ce_stage(ce));
 158         }
 159         write_name_quoted(ce->name + offset, stdout, line_terminator);
 160 }
 161
 162 static int show_one_ru(struct string_list_item *item, void *cbdata)
 163 {
 164         int offset = prefix_offset;
 165         const char *path = item->string;
 166         struct resolve_undo_info *ui = item->util;
 167         int i, len;
 168
 169         len = strlen(path);
 170         if (len < prefix_len)
 171                 return 0; /* outside of the prefix */
 172         if (!match_pathspec(pathspec, path, len, prefix_len, ps_matched))
 173                 return 0; /* uninterested */
 174         for (i = 0; i < 3; i++) {
 175                 if (!ui->mode[i])
 176                         continue;
 177                 printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 178                        find_unique_abbrev(ui->sha1[i], abbrev),
 179                        i + 1);
 180                 write_name_quoted(path + offset, stdout, line_terminator);
 181         }
 182         return 0;
 183 }
 184
 185 static void show_ru_info(const char *prefix)
 186 {
 187         if (!the_index.resolve_undo)
 188                 return;
 189         for_each_string_list(show_one_ru, the_index.resolve_undo, NULL);
 190 }
 191
 192 static void show_files(struct dir_struct *dir, const char *prefix)
 193 {
 194         int i;
 195
 196         /* For cached/deleted files we don't need to even do the readdir */
 197         if (show_others || show_killed) {
 198                 fill_directory(dir, pathspec);
 199                 if (show_others)
 200                         show_other_files(dir);
 201                 if (show_killed)
 202                         show_killed_files(dir);
 203         }
 204         if (show_cached | show_stage) {
 205                 for (i = 0; i < active_nr; i++) {
 206                         struct cache_entry *ce = active_cache[i];
 207                         int dtype = ce_to_dtype(ce);
 208                         if (dir->flags & DIR_SHOW_IGNORED &&
 209                             !excluded(dir, ce->name, &dtype))
 210                                 continue;
 211                         if (show_unmerged && !ce_stage(ce))
 212                                 continue;
 213                         if (ce->ce_flags & CE_UPDATE)
 214                                 continue;
 215                         show_ce_entry(ce_stage(ce) ? tag_unmerged :
 216                                 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 217                 }
 218         }
 219         if (show_deleted | show_modified) {
 220                 for (i = 0; i < active_nr; i++) {
 221                         struct cache_entry *ce = active_cache[i];
 222                         struct stat st;
 223                         int err;
 224                         int dtype = ce_to_dtype(ce);
 225                         if (dir->flags & DIR_SHOW_IGNORED &&
 226                             !excluded(dir, ce->name, &dtype))
 227                                 continue;
 228                         if (ce->ce_flags & CE_UPDATE)
 229                                 continue;
 230                         if (ce_skip_worktree(ce))
 231                                 continue;
 232                         err = lstat(ce->name, &st);
 233                         if (show_deleted && err)
 234                                 show_ce_entry(tag_removed, ce);
 235                         if (show_modified && ce_modified(ce, &st, 0))
 236                                 show_ce_entry(tag_modified, ce);
 237                 }
 238         }
 239 }
 240
 241 /*
 242  * Prune the index to only contain stuff starting with "prefix"
 243  */
 244 static void prune_cache(const char *prefix)
 245 {
 246         int pos = cache_name_pos(prefix, prefix_len);
 247         unsigned int first, last;
 248
 249         if (pos < 0)
 250                 pos = -pos-1;
 251         memmove(active_cache, active_cache + pos,
 252                 (active_nr - pos) * sizeof(struct cache_entry *));
 253         active_nr -= pos;
 254         first = 0;
 255         last = active_nr;
 256         while (last > first) {
 257                 int next = (last + first) >> 1;
 258                 struct cache_entry *ce = active_cache[next];
 259                 if (!strncmp(ce->name, prefix, prefix_len)) {
 260                         first = next+1;
 261                         continue;
 262                 }
 263                 last = next;
 264         }
 265         active_nr = last;
 266 }
 267
 268 static const char *verify_pathspec(const char *prefix)
 269 {
 270         const char **p, *n, *prev;
 271         unsigned long max;
 272
 273         prev = NULL;
 274         max = PATH_MAX;
 275         for (p = pathspec; (n = *p) != NULL; p++) {
 276                 int i, len = 0;
 277                 for (i = 0; i < max; i++) {
 278                         char c = n[i];
 279                         if (prev && prev[i] != c)
 280                                 break;
 281                         if (!c || c == '*' || c == '?')
 282                                 break;
 283                         if (c == '/')
 284                                 len = i+1;
 285                 }
 286                 prev = n;
 287                 if (len < max) {
 288                         max = len;
 289                         if (!max)
 290                                 break;
 291                 }
 292         }
 293
 294         if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 295                 die("git ls-files: cannot generate relative filenames containing '..'");
 296
 297         prefix_len = max;
 298         return max ? xmemdupz(prev, max) : NULL;
 299 }
 300
 301 static void strip_trailing_slash_from_submodules(void)
 302 {
 303         const char **p;
 304
 305         for (p = pathspec; *p != NULL; p++) {
 306                 int len = strlen(*p), pos;
 307
 308                 if (len < 1 || (*p)[len - 1] != '/')
 309                         continue;
 310                 pos = cache_name_pos(*p, len - 1);
 311                 if (pos >= 0 && S_ISGITLINK(active_cache[pos]->ce_mode))
 312                         *p = xstrndup(*p, len - 1);
 313         }
 314 }
 315
 316 /*
 317  * Read the tree specified with --with-tree option
 318  * (typically, HEAD) into stage #1 and then
 319  * squash them down to stage #0.  This is used for
 320  * --error-unmatch to list and check the path patterns
 321  * that were given from the command line.  We are not
 322  * going to write this index out.
 323  */
 324 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
 325 {
 326         struct tree *tree;
 327         unsigned char sha1[20];
 328         const char **match;
 329         struct cache_entry *last_stage0 = NULL;
 330         int i;
 331
 332         if (get_sha1(tree_name, sha1))
 333                 die("tree-ish %s not found.", tree_name);
 334         tree = parse_tree_indirect(sha1);
 335         if (!tree)
 336                 die("bad tree-ish %s", tree_name);
 337
 338         /* Hoist the unmerged entries up to stage #3 to make room */
 339         for (i = 0; i < active_nr; i++) {
 340                 struct cache_entry *ce = active_cache[i];
 341                 if (!ce_stage(ce))
 342                         continue;
 343                 ce->ce_flags |= CE_STAGEMASK;
 344         }
 345
 346         if (prefix) {
 347                 static const char *(matchbuf[2]);
 348                 matchbuf[0] = prefix;
 349                 matchbuf[1] = NULL;
 350                 match = matchbuf;
 351         } else
 352                 match = NULL;
 353         if (read_tree(tree, 1, match))
 354                 die("unable to read tree entries %s", tree_name);
 355
 356         for (i = 0; i < active_nr; i++) {
 357                 struct cache_entry *ce = active_cache[i];
 358                 switch (ce_stage(ce)) {
 359                 case 0:
 360                         last_stage0 = ce;
 361                         /* fallthru */
 362                 default:
 363                         continue;
 364                 case 1:
 365                         /*
 366                          * If there is stage #0 entry for this, we do not
 367                          * need to show it.  We use CE_UPDATE bit to mark
 368                          * such an entry.
 369                          */
 370                         if (last_stage0 &&
 371                             !strcmp(last_stage0->name, ce->name))
 372                                 ce->ce_flags |= CE_UPDATE;
 373                 }
 374         }
 375 }
 376
 377 int report_path_error(const char *ps_matched, const char **pathspec, int prefix_offset)
 378 {
 379         /*
 380          * Make sure all pathspec matched; otherwise it is an error.
 381          */
 382         int num, errors = 0;
 383         for (num = 0; pathspec[num]; num++) {
 384                 int other, found_dup;
 385
 386                 if (ps_matched[num])
 387                         continue;
 388                 /*
 389                  * The caller might have fed identical pathspec
 390                  * twice.  Do not barf on such a mistake.
 391                  */
 392                 for (found_dup = other = 0;
 393                      !found_dup && pathspec[other];
 394                      other++) {
 395                         if (other == num || !ps_matched[other])
 396                                 continue;
 397                         if (!strcmp(pathspec[other], pathspec[num]))
 398                                 /*
 399                                  * Ok, we have a match already.
 400                                  */
 401                                 found_dup = 1;
 402                 }
 403                 if (found_dup)
 404                         continue;
 405
 406                 error("pathspec '%s' did not match any file(s) known to git.",
 407                       pathspec[num] + prefix_offset);
 408                 errors++;
 409         }
 410         return errors;
 411 }
 412
 413 static const char * const ls_files_usage[] = {
 414         "git ls-files [options] [<file>]*",
 415         NULL
 416 };
 417
 418 static int option_parse_z(const struct option *opt,
 419                           const char *arg, int unset)
 420 {
 421         line_terminator = unset ? '\n' : '\0';
 422
 423         return 0;
 424 }
 425
 426 static int option_parse_exclude(const struct option *opt,
 427                                 const char *arg, int unset)
 428 {
 429         struct exclude_list *list = opt->value;
 430
 431         exc_given = 1;
 432         add_exclude(arg, "", 0, list);
 433
 434         return 0;
 435 }
 436
 437 static int option_parse_exclude_from(const struct option *opt,
 438                                      const char *arg, int unset)
 439 {
 440         struct dir_struct *dir = opt->value;
 441
 442         exc_given = 1;
 443         add_excludes_from_file(dir, arg);
 444
 445         return 0;
 446 }
 447
 448 static int option_parse_exclude_standard(const struct option *opt,
 449                                          const char *arg, int unset)
 450 {
 451         struct dir_struct *dir = opt->value;
 452
 453         exc_given = 1;
 454         setup_standard_excludes(dir);
 455
 456         return 0;
 457 }
 458
 459 int cmd_ls_files(int argc, const char **argv, const char *prefix)
 460 {
 461         int require_work_tree = 0, show_tag = 0;
 462         struct dir_struct dir;
 463         struct option builtin_ls_files_options[] = {
 464                 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 465                         "paths are separated with NUL character",
 466                         PARSE_OPT_NOARG, option_parse_z },
 467                 OPT_BOOLEAN('t', NULL, &show_tag,
 468                         "identify the file status with tags"),
 469                 OPT_BOOLEAN('v', NULL, &show_valid_bit,
 470                         "use lowercase letters for 'assume unchanged' files"),
 471                 OPT_BOOLEAN('c', "cached", &show_cached,
 472                         "show cached files in the output (default)"),
 473                 OPT_BOOLEAN('d', "deleted", &show_deleted,
 474                         "show deleted files in the output"),
 475                 OPT_BOOLEAN('m', "modified", &show_modified,
 476                         "show modified files in the output"),
 477                 OPT_BOOLEAN('o', "others", &show_others,
 478                         "show other files in the output"),
 479                 OPT_BIT('i', "ignored", &dir.flags,
 480                         "show ignored files in the output",
 481                         DIR_SHOW_IGNORED),
 482                 OPT_BOOLEAN('s', "stage", &show_stage,
 483                         "show staged contents' object name in the output"),
 484                 OPT_BOOLEAN('k', "killed", &show_killed,
 485                         "show files on the filesystem that need to be removed"),
 486                 OPT_BIT(0, "directory", &dir.flags,
 487                         "show 'other' directories' name only",
 488                         DIR_SHOW_OTHER_DIRECTORIES),
 489                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 490                         "don't show empty directories",
 491                         DIR_HIDE_EMPTY_DIRECTORIES),
 492                 OPT_BOOLEAN('u', "unmerged", &show_unmerged,
 493                         "show unmerged files in the output"),
 494                 OPT_BOOLEAN(0, "resolve-undo", &show_resolve_undo,
 495                             "show resolve-undo information"),
 496                 { OPTION_CALLBACK, 'x', "exclude", &dir.exclude_list[EXC_CMDL], "pattern",
 497                         "skip files matching pattern",
 498                         0, option_parse_exclude },
 499                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, "file",
 500                         "exclude patterns are read from <file>",
 501                         0, option_parse_exclude_from },
 502                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, "file",
 503                         "read additional per-directory exclude patterns in <file>"),
 504                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 505                         "add the standard git exclusions",
 506                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 507                 { OPTION_SET_INT, 0, "full-name", &prefix_offset, NULL,
 508                         "make the output relative to the project top directory",
 509                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 510                 OPT_BOOLEAN(0, "error-unmatch", &error_unmatch,
 511                         "if any <file> is not in the index, treat this as an error"),
 512                 OPT_STRING(0, "with-tree", &with_tree, "tree-ish",
 513                         "pretend that paths removed since <tree-ish> are still present"),
 514                 OPT__ABBREV(&abbrev),
 515                 OPT_END()
 516         };
 517
 518         memset(&dir, 0, sizeof(dir));
 519         if (prefix)
 520                 prefix_offset = strlen(prefix);
 521         git_config(git_default_config, NULL);
 522
 523         if (read_cache() < 0)
 524                 die("index file corrupt");
 525
 526         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 527                         ls_files_usage, 0);
 528         if (show_tag || show_valid_bit) {
 529                 tag_cached = "H ";
 530                 tag_unmerged = "M ";
 531                 tag_removed = "R ";
 532                 tag_modified = "C ";
 533                 tag_other = "? ";
 534                 tag_killed = "K ";
 535                 tag_skip_worktree = "S ";
 536                 tag_resolve_undo = "U ";
 537         }
 538         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 539                 require_work_tree = 1;
 540         if (show_unmerged)
 541                 /*
 542                  * There's no point in showing unmerged unless
 543                  * you also show the stage information.
 544                  */
 545                 show_stage = 1;
 546         if (dir.exclude_per_dir)
 547                 exc_given = 1;
 548
 549         if (require_work_tree && !is_inside_work_tree())
 550                 setup_work_tree();
 551
 552         pathspec = get_pathspec(prefix, argv);
 553
 554         /* be nice with submodule paths ending in a slash */
 555         if (pathspec)
 556                 strip_trailing_slash_from_submodules();
 557
 558         /* Verify that the pathspec matches the prefix */
 559         if (pathspec)
 560                 prefix = verify_pathspec(prefix);
 561
 562         /* Treat unmatching pathspec elements as errors */
 563         if (pathspec && error_unmatch) {
 564                 int num;
 565                 for (num = 0; pathspec[num]; num++)
 566                         ;
 567                 ps_matched = xcalloc(1, num);
 568         }
 569
 570         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 571                 die("ls-files --ignored needs some exclude pattern");
 572
 573         /* With no flags, we default to showing the cached files */
 574         if (!(show_stage | show_deleted | show_others | show_unmerged |
 575               show_killed | show_modified | show_resolve_undo))
 576                 show_cached = 1;
 577
 578         if (prefix)
 579                 prune_cache(prefix);
 580         if (with_tree) {
 581                 /*
 582                  * Basic sanity check; show-stages and show-unmerged
 583                  * would not make any sense with this option.
 584                  */
 585                 if (show_stage || show_unmerged)
 586                         die("ls-files --with-tree is incompatible with -s or -u");
 587                 overlay_tree_on_cache(with_tree, prefix);
 588         }
 589         show_files(&dir, prefix);
 590         if (show_resolve_undo)
 591                 show_ru_info(prefix);
 592
 593         if (ps_matched) {
 594                 int bad;
 595                 bad = report_path_error(ps_matched, pathspec, prefix_offset);
 596                 if (bad)
 597                         fprintf(stderr, "Did you forget to 'git add'?\n");
 598
 599                 return bad ? 1 : 0;
 600         }
 601
 602         return 0;
 603 }