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