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 static int debug_mode;
  29
  30 static const char *prefix;
  31 static int max_prefix_len;
  32 static int prefix_len;
  33 static const char **pathspec;
  34 static int error_unmatch;
  35 static char *ps_matched;
  36 static const char *with_tree;
  37 static int exc_given;
  38 static int exclude_args;
  39
  40 static const char *tag_cached = "";
  41 static const char *tag_unmerged = "";
  42 static const char *tag_removed = "";
  43 static const char *tag_other = "";
  44 static const char *tag_killed = "";
  45 static const char *tag_modified = "";
  46 static const char *tag_skip_worktree = "";
  47 static const char *tag_resolve_undo = "";
  48
  49 static void write_name(const char* name, size_t len)
  50 {
  51         write_name_quoted_relative(name, len, prefix, prefix_len, stdout,
  52                         line_terminator);
  53 }
  54
  55 static void show_dir_entry(const char *tag, struct dir_entry *ent)
  56 {
  57         int len = max_prefix_len;
  58
  59         if (len >= ent->len)
  60                 die("git ls-files: internal error - directory entry not superset of prefix");
  61
  62         if (!match_pathspec(pathspec, ent->name, ent->len, len, ps_matched))
  63                 return;
  64
  65         fputs(tag, stdout);
  66         write_name(ent->name, ent->len);
  67 }
  68
  69 static void show_other_files(struct dir_struct *dir)
  70 {
  71         int i;
  72
  73         for (i = 0; i < dir->nr; i++) {
  74                 struct dir_entry *ent = dir->entries[i];
  75                 if (!cache_name_is_other(ent->name, ent->len))
  76                         continue;
  77                 show_dir_entry(tag_other, ent);
  78         }
  79 }
  80
  81 static void show_killed_files(struct dir_struct *dir)
  82 {
  83         int i;
  84         for (i = 0; i < dir->nr; i++) {
  85                 struct dir_entry *ent = dir->entries[i];
  86                 char *cp, *sp;
  87                 int pos, len, killed = 0;
  88
  89                 for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
  90                         sp = strchr(cp, '/');
  91                         if (!sp) {
  92                                 /* If ent->name is prefix of an entry in the
  93                                  * cache, it will be killed.
  94                                  */
  95                                 pos = cache_name_pos(ent->name, ent->len);
  96                                 if (0 <= pos)
  97                                         die("bug in show-killed-files");
  98                                 pos = -pos - 1;
  99                                 while (pos < active_nr &&
 100                                        ce_stage(active_cache[pos]))
 101                                         pos++; /* skip unmerged */
 102                                 if (active_nr <= pos)
 103                                         break;
 104                                 /* pos points at a name immediately after
 105                                  * ent->name in the cache.  Does it expect
 106                                  * ent->name to be a directory?
 107                                  */
 108                                 len = ce_namelen(active_cache[pos]);
 109                                 if ((ent->len < len) &&
 110                                     !strncmp(active_cache[pos]->name,
 111                                              ent->name, ent->len) &&
 112                                     active_cache[pos]->name[ent->len] == '/')
 113                                         killed = 1;
 114                                 break;
 115                         }
 116                         if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 117                                 /* If any of the leading directories in
 118                                  * ent->name is registered in the cache,
 119                                  * ent->name will be killed.
 120                                  */
 121                                 killed = 1;
 122                                 break;
 123                         }
 124                 }
 125                 if (killed)
 126                         show_dir_entry(tag_killed, dir->entries[i]);
 127         }
 128 }
 129
 130 static void show_ce_entry(const char *tag, struct cache_entry *ce)
 131 {
 132         int len = max_prefix_len;
 133
 134         if (len >= ce_namelen(ce))
 135                 die("git ls-files: internal error - cache entry not superset of prefix");
 136
 137         if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), len, ps_matched))
 138                 return;
 139
 140         if (tag && *tag && show_valid_bit &&
 141             (ce->ce_flags & CE_VALID)) {
 142                 static char alttag[4];
 143                 memcpy(alttag, tag, 3);
 144                 if (isalpha(tag[0]))
 145                         alttag[0] = tolower(tag[0]);
 146                 else if (tag[0] == '?')
 147                         alttag[0] = '!';
 148                 else {
 149                         alttag[0] = 'v';
 150                         alttag[1] = tag[0];
 151                         alttag[2] = ' ';
 152                         alttag[3] = 0;
 153                 }
 154                 tag = alttag;
 155         }
 156
 157         if (!show_stage) {
 158                 fputs(tag, stdout);
 159         } else {
 160                 printf("%s%06o %s %d\t",
 161                        tag,
 162                        ce->ce_mode,
 163                        find_unique_abbrev(ce->sha1,abbrev),
 164                        ce_stage(ce));
 165         }
 166         write_name(ce->name, ce_namelen(ce));
 167         if (debug_mode) {
 168                 printf("  ctime: %d:%d\n", ce->ce_ctime.sec, ce->ce_ctime.nsec);
 169                 printf("  mtime: %d:%d\n", ce->ce_mtime.sec, ce->ce_mtime.nsec);
 170                 printf("  dev: %d\tino: %d\n", ce->ce_dev, ce->ce_ino);
 171                 printf("  uid: %d\tgid: %d\n", ce->ce_uid, ce->ce_gid);
 172                 printf("  size: %d\tflags: %x\n", ce->ce_size, ce->ce_flags);
 173         }
 174 }
 175
 176 static void show_ru_info(void)
 177 {
 178         struct string_list_item *item;
 179
 180         if (!the_index.resolve_undo)
 181                 return;
 182
 183         for_each_string_list_item(item, the_index.resolve_undo) {
 184                 const char *path = item->string;
 185                 struct resolve_undo_info *ui = item->util;
 186                 int i, len;
 187
 188                 len = strlen(path);
 189                 if (len < max_prefix_len)
 190                         continue; /* outside of the prefix */
 191                 if (!match_pathspec(pathspec, path, len, max_prefix_len, ps_matched))
 192                         continue; /* uninterested */
 193                 for (i = 0; i < 3; i++) {
 194                         if (!ui->mode[i])
 195                                 continue;
 196                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 197                                find_unique_abbrev(ui->sha1[i], abbrev),
 198                                i + 1);
 199                         write_name(path, len);
 200                 }
 201         }
 202 }
 203
 204 static int ce_excluded(struct dir_struct *dir, struct cache_entry *ce)
 205 {
 206         int dtype = ce_to_dtype(ce);
 207         return is_excluded(dir, ce->name, &dtype);
 208 }
 209
 210 static void show_files(struct dir_struct *dir)
 211 {
 212         int i;
 213
 214         /* For cached/deleted files we don't need to even do the readdir */
 215         if (show_others || show_killed) {
 216                 if (!show_others)
 217                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 218                 fill_directory(dir, pathspec);
 219                 if (show_others)
 220                         show_other_files(dir);
 221                 if (show_killed)
 222                         show_killed_files(dir);
 223         }
 224         if (show_cached | show_stage) {
 225                 for (i = 0; i < active_nr; i++) {
 226                         struct cache_entry *ce = active_cache[i];
 227                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 228                             !ce_excluded(dir, ce))
 229                                 continue;
 230                         if (show_unmerged && !ce_stage(ce))
 231                                 continue;
 232                         if (ce->ce_flags & CE_UPDATE)
 233                                 continue;
 234                         show_ce_entry(ce_stage(ce) ? tag_unmerged :
 235                                 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 236                 }
 237         }
 238         if (show_deleted | show_modified) {
 239                 for (i = 0; i < active_nr; i++) {
 240                         struct cache_entry *ce = active_cache[i];
 241                         struct stat st;
 242                         int err;
 243                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 244                             !ce_excluded(dir, ce))
 245                                 continue;
 246                         if (ce->ce_flags & CE_UPDATE)
 247                                 continue;
 248                         if (ce_skip_worktree(ce))
 249                                 continue;
 250                         err = lstat(ce->name, &st);
 251                         if (show_deleted && err)
 252                                 show_ce_entry(tag_removed, ce);
 253                         if (show_modified && ce_modified(ce, &st, 0))
 254                                 show_ce_entry(tag_modified, ce);
 255                 }
 256         }
 257 }
 258
 259 /*
 260  * Prune the index to only contain stuff starting with "prefix"
 261  */
 262 static void prune_cache(const char *prefix)
 263 {
 264         int pos = cache_name_pos(prefix, max_prefix_len);
 265         unsigned int first, last;
 266
 267         if (pos < 0)
 268                 pos = -pos-1;
 269         memmove(active_cache, active_cache + pos,
 270                 (active_nr - pos) * sizeof(struct cache_entry *));
 271         active_nr -= pos;
 272         first = 0;
 273         last = active_nr;
 274         while (last > first) {
 275                 int next = (last + first) >> 1;
 276                 struct cache_entry *ce = active_cache[next];
 277                 if (!strncmp(ce->name, prefix, max_prefix_len)) {
 278                         first = next+1;
 279                         continue;
 280                 }
 281                 last = next;
 282         }
 283         active_nr = last;
 284 }
 285
 286 static void strip_trailing_slash_from_submodules(void)
 287 {
 288         const char **p;
 289
 290         for (p = pathspec; *p != NULL; p++) {
 291                 int len = strlen(*p), pos;
 292
 293                 if (len < 1 || (*p)[len - 1] != '/')
 294                         continue;
 295                 pos = cache_name_pos(*p, len - 1);
 296                 if (pos >= 0 && S_ISGITLINK(active_cache[pos]->ce_mode))
 297                         *p = xstrndup(*p, len - 1);
 298         }
 299 }
 300
 301 /*
 302  * Read the tree specified with --with-tree option
 303  * (typically, HEAD) into stage #1 and then
 304  * squash them down to stage #0.  This is used for
 305  * --error-unmatch to list and check the path patterns
 306  * that were given from the command line.  We are not
 307  * going to write this index out.
 308  */
 309 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
 310 {
 311         struct tree *tree;
 312         unsigned char sha1[20];
 313         struct pathspec pathspec;
 314         struct cache_entry *last_stage0 = NULL;
 315         int i;
 316
 317         if (get_sha1(tree_name, sha1))
 318                 die("tree-ish %s not found.", tree_name);
 319         tree = parse_tree_indirect(sha1);
 320         if (!tree)
 321                 die("bad tree-ish %s", tree_name);
 322
 323         /* Hoist the unmerged entries up to stage #3 to make room */
 324         for (i = 0; i < active_nr; i++) {
 325                 struct cache_entry *ce = active_cache[i];
 326                 if (!ce_stage(ce))
 327                         continue;
 328                 ce->ce_flags |= CE_STAGEMASK;
 329         }
 330
 331         if (prefix) {
 332                 static const char *(matchbuf[2]);
 333                 matchbuf[0] = prefix;
 334                 matchbuf[1] = NULL;
 335                 init_pathspec(&pathspec, matchbuf);
 336                 pathspec.items[0].nowildcard_len = pathspec.items[0].len;
 337         } else
 338                 init_pathspec(&pathspec, NULL);
 339         if (read_tree(tree, 1, &pathspec))
 340                 die("unable to read tree entries %s", tree_name);
 341
 342         for (i = 0; i < active_nr; i++) {
 343                 struct cache_entry *ce = active_cache[i];
 344                 switch (ce_stage(ce)) {
 345                 case 0:
 346                         last_stage0 = ce;
 347                         /* fallthru */
 348                 default:
 349                         continue;
 350                 case 1:
 351                         /*
 352                          * If there is stage #0 entry for this, we do not
 353                          * need to show it.  We use CE_UPDATE bit to mark
 354                          * such an entry.
 355                          */
 356                         if (last_stage0 &&
 357                             !strcmp(last_stage0->name, ce->name))
 358                                 ce->ce_flags |= CE_UPDATE;
 359                 }
 360         }
 361 }
 362
 363 int report_path_error(const char *ps_matched, const char **pathspec, const char *prefix)
 364 {
 365         /*
 366          * Make sure all pathspec matched; otherwise it is an error.
 367          */
 368         struct strbuf sb = STRBUF_INIT;
 369         const char *name;
 370         int num, errors = 0;
 371         for (num = 0; pathspec[num]; num++) {
 372                 int other, found_dup;
 373
 374                 if (ps_matched[num])
 375                         continue;
 376                 /*
 377                  * The caller might have fed identical pathspec
 378                  * twice.  Do not barf on such a mistake.
 379                  */
 380                 for (found_dup = other = 0;
 381                      !found_dup && pathspec[other];
 382                      other++) {
 383                         if (other == num || !ps_matched[other])
 384                                 continue;
 385                         if (!strcmp(pathspec[other], pathspec[num]))
 386                                 /*
 387                                  * Ok, we have a match already.
 388                                  */
 389                                 found_dup = 1;
 390                 }
 391                 if (found_dup)
 392                         continue;
 393
 394                 name = quote_path_relative(pathspec[num], -1, &sb, prefix);
 395                 error("pathspec '%s' did not match any file(s) known to git.",
 396                       name);
 397                 errors++;
 398         }
 399         strbuf_release(&sb);
 400         return errors;
 401 }
 402
 403 static const char * const ls_files_usage[] = {
 404         N_("git ls-files [options] [<file>...]"),
 405         NULL
 406 };
 407
 408 static int option_parse_z(const struct option *opt,
 409                           const char *arg, int unset)
 410 {
 411         line_terminator = unset ? '\n' : '\0';
 412
 413         return 0;
 414 }
 415
 416 static int option_parse_exclude(const struct option *opt,
 417                                 const char *arg, int unset)
 418 {
 419         struct string_list *exclude_list = opt->value;
 420
 421         exc_given = 1;
 422         string_list_append(exclude_list, arg);
 423
 424         return 0;
 425 }
 426
 427 static int option_parse_exclude_from(const struct option *opt,
 428                                      const char *arg, int unset)
 429 {
 430         struct dir_struct *dir = opt->value;
 431
 432         exc_given = 1;
 433         add_excludes_from_file(dir, arg);
 434
 435         return 0;
 436 }
 437
 438 static int option_parse_exclude_standard(const struct option *opt,
 439                                          const char *arg, int unset)
 440 {
 441         struct dir_struct *dir = opt->value;
 442
 443         exc_given = 1;
 444         setup_standard_excludes(dir);
 445
 446         return 0;
 447 }
 448
 449 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 450 {
 451         int require_work_tree = 0, show_tag = 0, i;
 452         const char *max_prefix;
 453         struct dir_struct dir;
 454         struct exclude_list *el;
 455         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 456         struct option builtin_ls_files_options[] = {
 457                 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 458                         N_("paths are separated with NUL character"),
 459                         PARSE_OPT_NOARG, option_parse_z },
 460                 OPT_BOOLEAN('t', NULL, &show_tag,
 461                         N_("identify the file status with tags")),
 462                 OPT_BOOLEAN('v', NULL, &show_valid_bit,
 463                         N_("use lowercase letters for 'assume unchanged' files")),
 464                 OPT_BOOLEAN('c', "cached", &show_cached,
 465                         N_("show cached files in the output (default)")),
 466                 OPT_BOOLEAN('d', "deleted", &show_deleted,
 467                         N_("show deleted files in the output")),
 468                 OPT_BOOLEAN('m', "modified", &show_modified,
 469                         N_("show modified files in the output")),
 470                 OPT_BOOLEAN('o', "others", &show_others,
 471                         N_("show other files in the output")),
 472                 OPT_BIT('i', "ignored", &dir.flags,
 473                         N_("show ignored files in the output"),
 474                         DIR_SHOW_IGNORED),
 475                 OPT_BOOLEAN('s', "stage", &show_stage,
 476                         N_("show staged contents' object name in the output")),
 477                 OPT_BOOLEAN('k', "killed", &show_killed,
 478                         N_("show files on the filesystem that need to be removed")),
 479                 OPT_BIT(0, "directory", &dir.flags,
 480                         N_("show 'other' directories' name only"),
 481                         DIR_SHOW_OTHER_DIRECTORIES),
 482                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 483                         N_("don't show empty directories"),
 484                         DIR_HIDE_EMPTY_DIRECTORIES),
 485                 OPT_BOOLEAN('u', "unmerged", &show_unmerged,
 486                         N_("show unmerged files in the output")),
 487                 OPT_BOOLEAN(0, "resolve-undo", &show_resolve_undo,
 488                             N_("show resolve-undo information")),
 489                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 490                         N_("skip files matching pattern"),
 491                         0, option_parse_exclude },
 492                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 493                         N_("exclude patterns are read from <file>"),
 494                         0, option_parse_exclude_from },
 495                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 496                         N_("read additional per-directory exclude patterns in <file>")),
 497                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 498                         N_("add the standard git exclusions"),
 499                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 500                 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 501                         N_("make the output relative to the project top directory"),
 502                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 503                 OPT_BOOLEAN(0, "error-unmatch", &error_unmatch,
 504                         N_("if any <file> is not in the index, treat this as an error")),
 505                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 506                         N_("pretend that paths removed since <tree-ish> are still present")),
 507                 OPT__ABBREV(&abbrev),
 508                 OPT_BOOLEAN(0, "debug", &debug_mode, N_("show debugging data")),
 509                 OPT_END()
 510         };
 511
 512         if (argc == 2 && !strcmp(argv[1], "-h"))
 513                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 514
 515         memset(&dir, 0, sizeof(dir));
 516         prefix = cmd_prefix;
 517         if (prefix)
 518                 prefix_len = strlen(prefix);
 519         git_config(git_default_config, NULL);
 520
 521         if (read_cache() < 0)
 522                 die("index file corrupt");
 523
 524         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 525                         ls_files_usage, 0);
 526         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 527         for (i = 0; i < exclude_list.nr; i++) {
 528                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 529         }
 530         if (show_tag || show_valid_bit) {
 531                 tag_cached = "H ";
 532                 tag_unmerged = "M ";
 533                 tag_removed = "R ";
 534                 tag_modified = "C ";
 535                 tag_other = "? ";
 536                 tag_killed = "K ";
 537                 tag_skip_worktree = "S ";
 538                 tag_resolve_undo = "U ";
 539         }
 540         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 541                 require_work_tree = 1;
 542         if (show_unmerged)
 543                 /*
 544                  * There's no point in showing unmerged unless
 545                  * you also show the stage information.
 546                  */
 547                 show_stage = 1;
 548         if (dir.exclude_per_dir)
 549                 exc_given = 1;
 550
 551         if (require_work_tree && !is_inside_work_tree())
 552                 setup_work_tree();
 553
 554         pathspec = get_pathspec(prefix, argv);
 555
 556         /* be nice with submodule paths ending in a slash */
 557         if (pathspec)
 558                 strip_trailing_slash_from_submodules();
 559
 560         /* Find common prefix for all pathspec's */
 561         max_prefix = common_prefix(pathspec);
 562         max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
 563
 564         /* Treat unmatching pathspec elements as errors */
 565         if (pathspec && error_unmatch) {
 566                 int num;
 567                 for (num = 0; pathspec[num]; num++)
 568                         ;
 569                 ps_matched = xcalloc(1, num);
 570         }
 571
 572         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 573                 die("ls-files --ignored needs some exclude pattern");
 574
 575         /* With no flags, we default to showing the cached files */
 576         if (!(show_stage | show_deleted | show_others | show_unmerged |
 577               show_killed | show_modified | show_resolve_undo))
 578                 show_cached = 1;
 579
 580         if (max_prefix)
 581                 prune_cache(max_prefix);
 582         if (with_tree) {
 583                 /*
 584                  * Basic sanity check; show-stages and show-unmerged
 585                  * would not make any sense with this option.
 586                  */
 587                 if (show_stage || show_unmerged)
 588                         die("ls-files --with-tree is incompatible with -s or -u");
 589                 overlay_tree_on_cache(with_tree, max_prefix);
 590         }
 591         show_files(&dir);
 592         if (show_resolve_undo)
 593                 show_ru_info();
 594
 595         if (ps_matched) {
 596                 int bad;
 597                 bad = report_path_error(ps_matched, pathspec, prefix);
 598                 if (bad)
 599                         fprintf(stderr, "Did you forget to 'git add'?\n");
 600
 601                 return bad ? 1 : 0;
 602         }
 603
 604         return 0;
 605 }