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 (!dir_path_match(ent, &pathspec, 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(&pathspec, ce->name, ce_namelen(ce),
 143                             len, ps_matched,
 144                             S_ISDIR(ce->ce_mode) || S_ISGITLINK(ce->ce_mode)))
 145                 return;
 146
 147         if (tag && *tag && show_valid_bit &&
 148             (ce->ce_flags & CE_VALID)) {
 149                 static char alttag[4];
 150                 memcpy(alttag, tag, 3);
 151                 if (isalpha(tag[0]))
 152                         alttag[0] = tolower(tag[0]);
 153                 else if (tag[0] == '?')
 154                         alttag[0] = '!';
 155                 else {
 156                         alttag[0] = 'v';
 157                         alttag[1] = tag[0];
 158                         alttag[2] = ' ';
 159                         alttag[3] = 0;
 160                 }
 161                 tag = alttag;
 162         }
 163
 164         if (!show_stage) {
 165                 fputs(tag, stdout);
 166         } else {
 167                 printf("%s%06o %s %d\t",
 168                        tag,
 169                        ce->ce_mode,
 170                        find_unique_abbrev(ce->sha1,abbrev),
 171                        ce_stage(ce));
 172         }
 173         write_name(ce->name);
 174         if (debug_mode) {
 175                 const struct stat_data *sd = &ce->ce_stat_data;
 176
 177                 printf("  ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
 178                 printf("  mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
 179                 printf("  dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
 180                 printf("  uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
 181                 printf("  size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
 182         }
 183 }
 184
 185 static void show_ru_info(void)
 186 {
 187         struct string_list_item *item;
 188
 189         if (!the_index.resolve_undo)
 190                 return;
 191
 192         for_each_string_list_item(item, the_index.resolve_undo) {
 193                 const char *path = item->string;
 194                 struct resolve_undo_info *ui = item->util;
 195                 int i, len;
 196
 197                 len = strlen(path);
 198                 if (len < max_prefix_len)
 199                         continue; /* outside of the prefix */
 200                 if (!match_pathspec(&pathspec, path, len,
 201                                     max_prefix_len, ps_matched, 0))
 202                         continue; /* uninterested */
 203                 for (i = 0; i < 3; i++) {
 204                         if (!ui->mode[i])
 205                                 continue;
 206                         printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
 207                                find_unique_abbrev(ui->sha1[i], abbrev),
 208                                i + 1);
 209                         write_name(path);
 210                 }
 211         }
 212 }
 213
 214 static int ce_excluded(struct dir_struct *dir, const struct cache_entry *ce)
 215 {
 216         int dtype = ce_to_dtype(ce);
 217         return is_excluded(dir, ce->name, &dtype);
 218 }
 219
 220 static void show_files(struct dir_struct *dir)
 221 {
 222         int i;
 223
 224         /* For cached/deleted files we don't need to even do the readdir */
 225         if (show_others || show_killed) {
 226                 if (!show_others)
 227                         dir->flags |= DIR_COLLECT_KILLED_ONLY;
 228                 fill_directory(dir, &pathspec);
 229                 if (show_others)
 230                         show_other_files(dir);
 231                 if (show_killed)
 232                         show_killed_files(dir);
 233         }
 234         if (show_cached || show_stage) {
 235                 for (i = 0; i < active_nr; i++) {
 236                         const struct cache_entry *ce = active_cache[i];
 237                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 238                             !ce_excluded(dir, ce))
 239                                 continue;
 240                         if (show_unmerged && !ce_stage(ce))
 241                                 continue;
 242                         if (ce->ce_flags & CE_UPDATE)
 243                                 continue;
 244                         show_ce_entry(ce_stage(ce) ? tag_unmerged :
 245                                 (ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
 246                 }
 247         }
 248         if (show_deleted || show_modified) {
 249                 for (i = 0; i < active_nr; i++) {
 250                         const struct cache_entry *ce = active_cache[i];
 251                         struct stat st;
 252                         int err;
 253                         if ((dir->flags & DIR_SHOW_IGNORED) &&
 254                             !ce_excluded(dir, ce))
 255                                 continue;
 256                         if (ce->ce_flags & CE_UPDATE)
 257                                 continue;
 258                         if (ce_skip_worktree(ce))
 259                                 continue;
 260                         err = lstat(ce->name, &st);
 261                         if (show_deleted && err)
 262                                 show_ce_entry(tag_removed, ce);
 263                         if (show_modified && ce_modified(ce, &st, 0))
 264                                 show_ce_entry(tag_modified, ce);
 265                 }
 266         }
 267 }
 268
 269 /*
 270  * Prune the index to only contain stuff starting with "prefix"
 271  */
 272 static void prune_cache(const char *prefix)
 273 {
 274         int pos = cache_name_pos(prefix, max_prefix_len);
 275         unsigned int first, last;
 276
 277         if (pos < 0)
 278                 pos = -pos-1;
 279         memmove(active_cache, active_cache + pos,
 280                 (active_nr - pos) * sizeof(struct cache_entry *));
 281         active_nr -= pos;
 282         first = 0;
 283         last = active_nr;
 284         while (last > first) {
 285                 int next = (last + first) >> 1;
 286                 const struct cache_entry *ce = active_cache[next];
 287                 if (!strncmp(ce->name, prefix, max_prefix_len)) {
 288                         first = next+1;
 289                         continue;
 290                 }
 291                 last = next;
 292         }
 293         active_nr = last;
 294 }
 295
 296 /*
 297  * Read the tree specified with --with-tree option
 298  * (typically, HEAD) into stage #1 and then
 299  * squash them down to stage #0.  This is used for
 300  * --error-unmatch to list and check the path patterns
 301  * that were given from the command line.  We are not
 302  * going to write this index out.
 303  */
 304 void overlay_tree_on_cache(const char *tree_name, const char *prefix)
 305 {
 306         struct tree *tree;
 307         unsigned char sha1[20];
 308         struct pathspec pathspec;
 309         struct cache_entry *last_stage0 = NULL;
 310         int i;
 311
 312         if (get_sha1(tree_name, sha1))
 313                 die("tree-ish %s not found.", tree_name);
 314         tree = parse_tree_indirect(sha1);
 315         if (!tree)
 316                 die("bad tree-ish %s", tree_name);
 317
 318         /* Hoist the unmerged entries up to stage #3 to make room */
 319         for (i = 0; i < active_nr; i++) {
 320                 struct cache_entry *ce = active_cache[i];
 321                 if (!ce_stage(ce))
 322                         continue;
 323                 ce->ce_flags |= CE_STAGEMASK;
 324         }
 325
 326         if (prefix) {
 327                 static const char *(matchbuf[1]);
 328                 matchbuf[0] = NULL;
 329                 parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
 330                                PATHSPEC_PREFER_CWD, prefix, matchbuf);
 331         } else
 332                 memset(&pathspec, 0, sizeof(pathspec));
 333         if (read_tree(tree, 1, &pathspec))
 334                 die("unable to read tree entries %s", tree_name);
 335
 336         for (i = 0; i < active_nr; i++) {
 337                 struct cache_entry *ce = active_cache[i];
 338                 switch (ce_stage(ce)) {
 339                 case 0:
 340                         last_stage0 = ce;
 341                         /* fallthru */
 342                 default:
 343                         continue;
 344                 case 1:
 345                         /*
 346                          * If there is stage #0 entry for this, we do not
 347                          * need to show it.  We use CE_UPDATE bit to mark
 348                          * such an entry.
 349                          */
 350                         if (last_stage0 &&
 351                             !strcmp(last_stage0->name, ce->name))
 352                                 ce->ce_flags |= CE_UPDATE;
 353                 }
 354         }
 355 }
 356
 357 static const char * const ls_files_usage[] = {
 358         N_("git ls-files [options] [<file>...]"),
 359         NULL
 360 };
 361
 362 static int option_parse_z(const struct option *opt,
 363                           const char *arg, int unset)
 364 {
 365         line_terminator = unset ? '\n' : '\0';
 366
 367         return 0;
 368 }
 369
 370 static int option_parse_exclude(const struct option *opt,
 371                                 const char *arg, int unset)
 372 {
 373         struct string_list *exclude_list = opt->value;
 374
 375         exc_given = 1;
 376         string_list_append(exclude_list, arg);
 377
 378         return 0;
 379 }
 380
 381 static int option_parse_exclude_from(const struct option *opt,
 382                                      const char *arg, int unset)
 383 {
 384         struct dir_struct *dir = opt->value;
 385
 386         exc_given = 1;
 387         add_excludes_from_file(dir, arg);
 388
 389         return 0;
 390 }
 391
 392 static int option_parse_exclude_standard(const struct option *opt,
 393                                          const char *arg, int unset)
 394 {
 395         struct dir_struct *dir = opt->value;
 396
 397         exc_given = 1;
 398         setup_standard_excludes(dir);
 399
 400         return 0;
 401 }
 402
 403 int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
 404 {
 405         int require_work_tree = 0, show_tag = 0, i;
 406         const char *max_prefix;
 407         struct dir_struct dir;
 408         struct exclude_list *el;
 409         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 410         struct option builtin_ls_files_options[] = {
 411                 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 412                         N_("paths are separated with NUL character"),
 413                         PARSE_OPT_NOARG, option_parse_z },
 414                 OPT_BOOL('t', NULL, &show_tag,
 415                         N_("identify the file status with tags")),
 416                 OPT_BOOL('v', NULL, &show_valid_bit,
 417                         N_("use lowercase letters for 'assume unchanged' files")),
 418                 OPT_BOOL('c', "cached", &show_cached,
 419                         N_("show cached files in the output (default)")),
 420                 OPT_BOOL('d', "deleted", &show_deleted,
 421                         N_("show deleted files in the output")),
 422                 OPT_BOOL('m', "modified", &show_modified,
 423                         N_("show modified files in the output")),
 424                 OPT_BOOL('o', "others", &show_others,
 425                         N_("show other files in the output")),
 426                 OPT_BIT('i', "ignored", &dir.flags,
 427                         N_("show ignored files in the output"),
 428                         DIR_SHOW_IGNORED),
 429                 OPT_BOOL('s', "stage", &show_stage,
 430                         N_("show staged contents' object name in the output")),
 431                 OPT_BOOL('k', "killed", &show_killed,
 432                         N_("show files on the filesystem that need to be removed")),
 433                 OPT_BIT(0, "directory", &dir.flags,
 434                         N_("show 'other' directories' name only"),
 435                         DIR_SHOW_OTHER_DIRECTORIES),
 436                 OPT_NEGBIT(0, "empty-directory", &dir.flags,
 437                         N_("don't show empty directories"),
 438                         DIR_HIDE_EMPTY_DIRECTORIES),
 439                 OPT_BOOL('u', "unmerged", &show_unmerged,
 440                         N_("show unmerged files in the output")),
 441                 OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
 442                             N_("show resolve-undo information")),
 443                 { OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
 444                         N_("skip files matching pattern"),
 445                         0, option_parse_exclude },
 446                 { OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
 447                         N_("exclude patterns are read from <file>"),
 448                         0, option_parse_exclude_from },
 449                 OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
 450                         N_("read additional per-directory exclude patterns in <file>")),
 451                 { OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
 452                         N_("add the standard git exclusions"),
 453                         PARSE_OPT_NOARG, option_parse_exclude_standard },
 454                 { OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
 455                         N_("make the output relative to the project top directory"),
 456                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
 457                 OPT_BOOL(0, "error-unmatch", &error_unmatch,
 458                         N_("if any <file> is not in the index, treat this as an error")),
 459                 OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
 460                         N_("pretend that paths removed since <tree-ish> are still present")),
 461                 OPT__ABBREV(&abbrev),
 462                 OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
 463                 OPT_END()
 464         };
 465
 466         if (argc == 2 && !strcmp(argv[1], "-h"))
 467                 usage_with_options(ls_files_usage, builtin_ls_files_options);
 468
 469         memset(&dir, 0, sizeof(dir));
 470         prefix = cmd_prefix;
 471         if (prefix)
 472                 prefix_len = strlen(prefix);
 473         git_config(git_default_config, NULL);
 474
 475         if (read_cache() < 0)
 476                 die("index file corrupt");
 477
 478         argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
 479                         ls_files_usage, 0);
 480         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 481         for (i = 0; i < exclude_list.nr; i++) {
 482                 add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
 483         }
 484         if (show_tag || show_valid_bit) {
 485                 tag_cached = "H ";
 486                 tag_unmerged = "M ";
 487                 tag_removed = "R ";
 488                 tag_modified = "C ";
 489                 tag_other = "? ";
 490                 tag_killed = "K ";
 491                 tag_skip_worktree = "S ";
 492                 tag_resolve_undo = "U ";
 493         }
 494         if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
 495                 require_work_tree = 1;
 496         if (show_unmerged)
 497                 /*
 498                  * There's no point in showing unmerged unless
 499                  * you also show the stage information.
 500                  */
 501                 show_stage = 1;
 502         if (dir.exclude_per_dir)
 503                 exc_given = 1;
 504
 505         if (require_work_tree && !is_inside_work_tree())
 506                 setup_work_tree();
 507
 508         parse_pathspec(&pathspec, 0,
 509                        PATHSPEC_PREFER_CWD |
 510                        PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
 511                        prefix, argv);
 512
 513         /* Find common prefix for all pathspec's */
 514         max_prefix = common_prefix(&pathspec);
 515         max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
 516
 517         /* Treat unmatching pathspec elements as errors */
 518         if (pathspec.nr && error_unmatch)
 519                 ps_matched = xcalloc(1, pathspec.nr);
 520
 521         if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
 522                 die("ls-files --ignored needs some exclude pattern");
 523
 524         /* With no flags, we default to showing the cached files */
 525         if (!(show_stage || show_deleted || show_others || show_unmerged ||
 526               show_killed || show_modified || show_resolve_undo))
 527                 show_cached = 1;
 528
 529         if (max_prefix)
 530                 prune_cache(max_prefix);
 531         if (with_tree) {
 532                 /*
 533                  * Basic sanity check; show-stages and show-unmerged
 534                  * would not make any sense with this option.
 535                  */
 536                 if (show_stage || show_unmerged)
 537                         die("ls-files --with-tree is incompatible with -s or -u");
 538                 overlay_tree_on_cache(with_tree, max_prefix);
 539         }
 540         show_files(&dir);
 541         if (show_resolve_undo)
 542                 show_ru_info();
 543
 544         if (ps_matched) {
 545                 int bad;
 546                 bad = report_path_error(ps_matched, &pathspec, prefix);
 547                 if (bad)
 548                         fprintf(stderr, "Did you forget to 'git add'?\n");
 549
 550                 return bad ? 1 : 0;
 551         }
 552
 553         return 0;
 554 }