1/* 2 * This handles recursive filename detection with exclude 3 * files, index knowledge etc.. 4 * 5 * See Documentation/technical/api-directory-listing.txt 6 * 7 * Copyright (C) Linus Torvalds, 2005-2006 8 * Junio Hamano, 2005-2006 9 */ 10#define NO_THE_INDEX_COMPATIBILITY_MACROS 11#include "cache.h" 12#include "dir.h" 13#include "attr.h" 14#include "refs.h" 15#include "wildmatch.h" 16#include "pathspec.h" 17#include "utf8.h" 18#include "varint.h" 19#include "ewah/ewok.h" 20 21/* 22 * Tells read_directory_recursive how a file or directory should be treated. 23 * Values are ordered by significance, e.g. if a directory contains both 24 * excluded and untracked files, it is listed as untracked because 25 * path_untracked > path_excluded. 26 */ 27enum path_treatment { 28 path_none = 0, 29 path_recurse, 30 path_excluded, 31 path_untracked 32}; 33 34/* 35 * Support data structure for our opendir/readdir/closedir wrappers 36 */ 37struct cached_dir { 38 DIR *fdir; 39 struct untracked_cache_dir *untracked; 40 int nr_files; 41 int nr_dirs; 42 43 struct dirent *de; 44 const char *file; 45 struct untracked_cache_dir *ucd; 46}; 47 48static enum path_treatment read_directory_recursive(struct dir_struct *dir, 49 const char *path, int len, struct untracked_cache_dir *untracked, 50 int check_only, const struct pathspec *pathspec); 51static int get_dtype(struct dirent *de, struct index_state *istate, 52 const char *path, int len); 53 54int fspathcmp(const char *a, const char *b) 55{ 56 return ignore_case ? strcasecmp(a, b) : strcmp(a, b); 57} 58 59int fspathncmp(const char *a, const char *b, size_t count) 60{ 61 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); 62} 63 64int git_fnmatch(const struct pathspec_item *item, 65 const char *pattern, const char *string, 66 int prefix) 67{ 68 if (prefix > 0) { 69 if (ps_strncmp(item, pattern, string, prefix)) 70 return WM_NOMATCH; 71 pattern += prefix; 72 string += prefix; 73 } 74 if (item->flags & PATHSPEC_ONESTAR) { 75 int pattern_len = strlen(++pattern); 76 int string_len = strlen(string); 77 return string_len < pattern_len || 78 ps_strcmp(item, pattern, 79 string + string_len - pattern_len); 80 } 81 if (item->magic & PATHSPEC_GLOB) 82 return wildmatch(pattern, string, 83 WM_PATHNAME | 84 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0), 85 NULL); 86 else 87 /* wildmatch has not learned no FNM_PATHNAME mode yet */ 88 return wildmatch(pattern, string, 89 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0, 90 NULL); 91} 92 93static int fnmatch_icase_mem(const char *pattern, int patternlen, 94 const char *string, int stringlen, 95 int flags) 96{ 97 int match_status; 98 struct strbuf pat_buf = STRBUF_INIT; 99 struct strbuf str_buf = STRBUF_INIT; 100 const char *use_pat = pattern; 101 const char *use_str = string; 102 103 if (pattern[patternlen]) { 104 strbuf_add(&pat_buf, pattern, patternlen); 105 use_pat = pat_buf.buf; 106 } 107 if (string[stringlen]) { 108 strbuf_add(&str_buf, string, stringlen); 109 use_str = str_buf.buf; 110 } 111 112 if (ignore_case) 113 flags |= WM_CASEFOLD; 114 match_status = wildmatch(use_pat, use_str, flags, NULL); 115 116 strbuf_release(&pat_buf); 117 strbuf_release(&str_buf); 118 119 return match_status; 120} 121 122static size_t common_prefix_len(const struct pathspec *pathspec) 123{ 124 int n; 125 size_t max = 0; 126 127 /* 128 * ":(icase)path" is treated as a pathspec full of 129 * wildcard. In other words, only prefix is considered common 130 * prefix. If the pathspec is abc/foo abc/bar, running in 131 * subdir xyz, the common prefix is still xyz, not xuz/abc as 132 * in non-:(icase). 133 */ 134 GUARD_PATHSPEC(pathspec, 135 PATHSPEC_FROMTOP | 136 PATHSPEC_MAXDEPTH | 137 PATHSPEC_LITERAL | 138 PATHSPEC_GLOB | 139 PATHSPEC_ICASE | 140 PATHSPEC_EXCLUDE | 141 PATHSPEC_ATTR); 142 143 for (n = 0; n < pathspec->nr; n++) { 144 size_t i = 0, len = 0, item_len; 145 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE) 146 continue; 147 if (pathspec->items[n].magic & PATHSPEC_ICASE) 148 item_len = pathspec->items[n].prefix; 149 else 150 item_len = pathspec->items[n].nowildcard_len; 151 while (i < item_len && (n == 0 || i < max)) { 152 char c = pathspec->items[n].match[i]; 153 if (c != pathspec->items[0].match[i]) 154 break; 155 if (c == '/') 156 len = i + 1; 157 i++; 158 } 159 if (n == 0 || len < max) { 160 max = len; 161 if (!max) 162 break; 163 } 164 } 165 return max; 166} 167 168/* 169 * Returns a copy of the longest leading path common among all 170 * pathspecs. 171 */ 172char *common_prefix(const struct pathspec *pathspec) 173{ 174 unsigned long len = common_prefix_len(pathspec); 175 176 return len ? xmemdupz(pathspec->items[0].match, len) : NULL; 177} 178 179int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec) 180{ 181 const char *prefix; 182 size_t prefix_len; 183 184 /* 185 * Calculate common prefix for the pathspec, and 186 * use that to optimize the directory walk 187 */ 188 prefix_len = common_prefix_len(pathspec); 189 prefix = prefix_len ? pathspec->items[0].match : ""; 190 191 /* Read the directory and prune it */ 192 read_directory(dir, prefix, prefix_len, pathspec); 193 194 return prefix_len; 195} 196 197int within_depth(const char *name, int namelen, 198 int depth, int max_depth) 199{ 200 const char *cp = name, *cpe = name + namelen; 201 202 while (cp < cpe) { 203 if (*cp++ != '/') 204 continue; 205 depth++; 206 if (depth > max_depth) 207 return 0; 208 } 209 return 1; 210} 211 212#define DO_MATCH_EXCLUDE (1<<0) 213#define DO_MATCH_DIRECTORY (1<<1) 214#define DO_MATCH_SUBMODULE (1<<2) 215 216static int match_attrs(const char *name, int namelen, 217 const struct pathspec_item *item) 218{ 219 int i; 220 221 git_check_attr(name, item->attr_check); 222 for (i = 0; i < item->attr_match_nr; i++) { 223 const char *value; 224 int matched; 225 enum attr_match_mode match_mode; 226 227 value = item->attr_check->items[i].value; 228 match_mode = item->attr_match[i].match_mode; 229 230 if (ATTR_TRUE(value)) 231 matched = (match_mode == MATCH_SET); 232 else if (ATTR_FALSE(value)) 233 matched = (match_mode == MATCH_UNSET); 234 else if (ATTR_UNSET(value)) 235 matched = (match_mode == MATCH_UNSPECIFIED); 236 else 237 matched = (match_mode == MATCH_VALUE && 238 !strcmp(item->attr_match[i].value, value)); 239 if (!matched) 240 return 0; 241 } 242 243 return 1; 244} 245 246/* 247 * Does 'match' match the given name? 248 * A match is found if 249 * 250 * (1) the 'match' string is leading directory of 'name', or 251 * (2) the 'match' string is a wildcard and matches 'name', or 252 * (3) the 'match' string is exactly the same as 'name'. 253 * 254 * and the return value tells which case it was. 255 * 256 * It returns 0 when there is no match. 257 */ 258static int match_pathspec_item(const struct pathspec_item *item, int prefix, 259 const char *name, int namelen, unsigned flags) 260{ 261 /* name/namelen has prefix cut off by caller */ 262 const char *match = item->match + prefix; 263 int matchlen = item->len - prefix; 264 265 /* 266 * The normal call pattern is: 267 * 1. prefix = common_prefix_len(ps); 268 * 2. prune something, or fill_directory 269 * 3. match_pathspec() 270 * 271 * 'prefix' at #1 may be shorter than the command's prefix and 272 * it's ok for #2 to match extra files. Those extras will be 273 * trimmed at #3. 274 * 275 * Suppose the pathspec is 'foo' and '../bar' running from 276 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 277 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 278 * user does not want XYZ/foo, only the "foo" part should be 279 * case-insensitive. We need to filter out XYZ/foo here. In 280 * other words, we do not trust the caller on comparing the 281 * prefix part when :(icase) is involved. We do exact 282 * comparison ourselves. 283 * 284 * Normally the caller (common_prefix_len() in fact) does 285 * _exact_ matching on name[-prefix+1..-1] and we do not need 286 * to check that part. Be defensive and check it anyway, in 287 * case common_prefix_len is changed, or a new caller is 288 * introduced that does not use common_prefix_len. 289 * 290 * If the penalty turns out too high when prefix is really 291 * long, maybe change it to 292 * strncmp(match, name, item->prefix - prefix) 293 */ 294 if (item->prefix && (item->magic & PATHSPEC_ICASE) && 295 strncmp(item->match, name - prefix, item->prefix)) 296 return 0; 297 298 if (item->attr_match_nr && !match_attrs(name, namelen, item)) 299 return 0; 300 301 /* If the match was just the prefix, we matched */ 302 if (!*match) 303 return MATCHED_RECURSIVELY; 304 305 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 306 if (matchlen == namelen) 307 return MATCHED_EXACTLY; 308 309 if (match[matchlen-1] == '/' || name[matchlen] == '/') 310 return MATCHED_RECURSIVELY; 311 } else if ((flags & DO_MATCH_DIRECTORY) && 312 match[matchlen - 1] == '/' && 313 namelen == matchlen - 1 && 314 !ps_strncmp(item, match, name, namelen)) 315 return MATCHED_EXACTLY; 316 317 if (item->nowildcard_len < item->len && 318 !git_fnmatch(item, match, name, 319 item->nowildcard_len - prefix)) 320 return MATCHED_FNMATCH; 321 322 /* Perform checks to see if "name" is a super set of the pathspec */ 323 if (flags & DO_MATCH_SUBMODULE) { 324 /* name is a literal prefix of the pathspec */ 325 if ((namelen < matchlen) && 326 (match[namelen] == '/') && 327 !ps_strncmp(item, match, name, namelen)) 328 return MATCHED_RECURSIVELY; 329 330 /* name" doesn't match up to the first wild character */ 331 if (item->nowildcard_len < item->len && 332 ps_strncmp(item, match, name, 333 item->nowildcard_len - prefix)) 334 return 0; 335 336 /* 337 * Here is where we would perform a wildmatch to check if 338 * "name" can be matched as a directory (or a prefix) against 339 * the pathspec. Since wildmatch doesn't have this capability 340 * at the present we have to punt and say that it is a match, 341 * potentially returning a false positive 342 * The submodules themselves will be able to perform more 343 * accurate matching to determine if the pathspec matches. 344 */ 345 return MATCHED_RECURSIVELY; 346 } 347 348 return 0; 349} 350 351/* 352 * Given a name and a list of pathspecs, returns the nature of the 353 * closest (i.e. most specific) match of the name to any of the 354 * pathspecs. 355 * 356 * The caller typically calls this multiple times with the same 357 * pathspec and seen[] array but with different name/namelen 358 * (e.g. entries from the index) and is interested in seeing if and 359 * how each pathspec matches all the names it calls this function 360 * with. A mark is left in the seen[] array for each pathspec element 361 * indicating the closest type of match that element achieved, so if 362 * seen[n] remains zero after multiple invocations, that means the nth 363 * pathspec did not match any names, which could indicate that the 364 * user mistyped the nth pathspec. 365 */ 366static int do_match_pathspec(const struct pathspec *ps, 367 const char *name, int namelen, 368 int prefix, char *seen, 369 unsigned flags) 370{ 371 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE; 372 373 GUARD_PATHSPEC(ps, 374 PATHSPEC_FROMTOP | 375 PATHSPEC_MAXDEPTH | 376 PATHSPEC_LITERAL | 377 PATHSPEC_GLOB | 378 PATHSPEC_ICASE | 379 PATHSPEC_EXCLUDE | 380 PATHSPEC_ATTR); 381 382 if (!ps->nr) { 383 if (!ps->recursive || 384 !(ps->magic & PATHSPEC_MAXDEPTH) || 385 ps->max_depth == -1) 386 return MATCHED_RECURSIVELY; 387 388 if (within_depth(name, namelen, 0, ps->max_depth)) 389 return MATCHED_EXACTLY; 390 else 391 return 0; 392 } 393 394 name += prefix; 395 namelen -= prefix; 396 397 for (i = ps->nr - 1; i >= 0; i--) { 398 int how; 399 400 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 401 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 402 continue; 403 404 if (seen && seen[i] == MATCHED_EXACTLY) 405 continue; 406 /* 407 * Make exclude patterns optional and never report 408 * "pathspec ':(exclude)foo' matches no files" 409 */ 410 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 411 seen[i] = MATCHED_FNMATCH; 412 how = match_pathspec_item(ps->items+i, prefix, name, 413 namelen, flags); 414 if (ps->recursive && 415 (ps->magic & PATHSPEC_MAXDEPTH) && 416 ps->max_depth != -1 && 417 how && how != MATCHED_FNMATCH) { 418 int len = ps->items[i].len; 419 if (name[len] == '/') 420 len++; 421 if (within_depth(name+len, namelen-len, 0, ps->max_depth)) 422 how = MATCHED_EXACTLY; 423 else 424 how = 0; 425 } 426 if (how) { 427 if (retval < how) 428 retval = how; 429 if (seen && seen[i] < how) 430 seen[i] = how; 431 } 432 } 433 return retval; 434} 435 436int match_pathspec(const struct pathspec *ps, 437 const char *name, int namelen, 438 int prefix, char *seen, int is_dir) 439{ 440 int positive, negative; 441 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0; 442 positive = do_match_pathspec(ps, name, namelen, 443 prefix, seen, flags); 444 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 445 return positive; 446 negative = do_match_pathspec(ps, name, namelen, 447 prefix, seen, 448 flags | DO_MATCH_EXCLUDE); 449 return negative ? 0 : positive; 450} 451 452/** 453 * Check if a submodule is a superset of the pathspec 454 */ 455int submodule_path_match(const struct pathspec *ps, 456 const char *submodule_name, 457 char *seen) 458{ 459 int matched = do_match_pathspec(ps, submodule_name, 460 strlen(submodule_name), 461 0, seen, 462 DO_MATCH_DIRECTORY | 463 DO_MATCH_SUBMODULE); 464 return matched; 465} 466 467int report_path_error(const char *ps_matched, 468 const struct pathspec *pathspec, 469 const char *prefix) 470{ 471 /* 472 * Make sure all pathspec matched; otherwise it is an error. 473 */ 474 int num, errors = 0; 475 for (num = 0; num < pathspec->nr; num++) { 476 int other, found_dup; 477 478 if (ps_matched[num]) 479 continue; 480 /* 481 * The caller might have fed identical pathspec 482 * twice. Do not barf on such a mistake. 483 * FIXME: parse_pathspec should have eliminated 484 * duplicate pathspec. 485 */ 486 for (found_dup = other = 0; 487 !found_dup && other < pathspec->nr; 488 other++) { 489 if (other == num || !ps_matched[other]) 490 continue; 491 if (!strcmp(pathspec->items[other].original, 492 pathspec->items[num].original)) 493 /* 494 * Ok, we have a match already. 495 */ 496 found_dup = 1; 497 } 498 if (found_dup) 499 continue; 500 501 error("pathspec '%s' did not match any file(s) known to git.", 502 pathspec->items[num].original); 503 errors++; 504 } 505 return errors; 506} 507 508/* 509 * Return the length of the "simple" part of a path match limiter. 510 */ 511int simple_length(const char *match) 512{ 513 int len = -1; 514 515 for (;;) { 516 unsigned char c = *match++; 517 len++; 518 if (c == '\0' || is_glob_special(c)) 519 return len; 520 } 521} 522 523int no_wildcard(const char *string) 524{ 525 return string[simple_length(string)] == '\0'; 526} 527 528void parse_exclude_pattern(const char **pattern, 529 int *patternlen, 530 unsigned *flags, 531 int *nowildcardlen) 532{ 533 const char *p = *pattern; 534 size_t i, len; 535 536 *flags = 0; 537 if (*p == '!') { 538 *flags |= EXC_FLAG_NEGATIVE; 539 p++; 540 } 541 len = strlen(p); 542 if (len && p[len - 1] == '/') { 543 len--; 544 *flags |= EXC_FLAG_MUSTBEDIR; 545 } 546 for (i = 0; i < len; i++) { 547 if (p[i] == '/') 548 break; 549 } 550 if (i == len) 551 *flags |= EXC_FLAG_NODIR; 552 *nowildcardlen = simple_length(p); 553 /* 554 * we should have excluded the trailing slash from 'p' too, 555 * but that's one more allocation. Instead just make sure 556 * nowildcardlen does not exceed real patternlen 557 */ 558 if (*nowildcardlen > len) 559 *nowildcardlen = len; 560 if (*p == '*' && no_wildcard(p + 1)) 561 *flags |= EXC_FLAG_ENDSWITH; 562 *pattern = p; 563 *patternlen = len; 564} 565 566void add_exclude(const char *string, const char *base, 567 int baselen, struct exclude_list *el, int srcpos) 568{ 569 struct exclude *x; 570 int patternlen; 571 unsigned flags; 572 int nowildcardlen; 573 574 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 575 if (flags & EXC_FLAG_MUSTBEDIR) { 576 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen); 577 } else { 578 x = xmalloc(sizeof(*x)); 579 x->pattern = string; 580 } 581 x->patternlen = patternlen; 582 x->nowildcardlen = nowildcardlen; 583 x->base = base; 584 x->baselen = baselen; 585 x->flags = flags; 586 x->srcpos = srcpos; 587 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc); 588 el->excludes[el->nr++] = x; 589 x->el = el; 590} 591 592static void *read_skip_worktree_file_from_index(const struct index_state *istate, 593 const char *path, size_t *size, 594 struct sha1_stat *sha1_stat) 595{ 596 int pos, len; 597 unsigned long sz; 598 enum object_type type; 599 void *data; 600 601 len = strlen(path); 602 pos = index_name_pos(istate, path, len); 603 if (pos < 0) 604 return NULL; 605 if (!ce_skip_worktree(istate->cache[pos])) 606 return NULL; 607 data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz); 608 if (!data || type != OBJ_BLOB) { 609 free(data); 610 return NULL; 611 } 612 *size = xsize_t(sz); 613 if (sha1_stat) { 614 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat)); 615 hashcpy(sha1_stat->sha1, istate->cache[pos]->oid.hash); 616 } 617 return data; 618} 619 620/* 621 * Frees memory within el which was allocated for exclude patterns and 622 * the file buffer. Does not free el itself. 623 */ 624void clear_exclude_list(struct exclude_list *el) 625{ 626 int i; 627 628 for (i = 0; i < el->nr; i++) 629 free(el->excludes[i]); 630 free(el->excludes); 631 free(el->filebuf); 632 633 memset(el, 0, sizeof(*el)); 634} 635 636static void trim_trailing_spaces(char *buf) 637{ 638 char *p, *last_space = NULL; 639 640 for (p = buf; *p; p++) 641 switch (*p) { 642 case ' ': 643 if (!last_space) 644 last_space = p; 645 break; 646 case '\\': 647 p++; 648 if (!*p) 649 return; 650 /* fallthrough */ 651 default: 652 last_space = NULL; 653 } 654 655 if (last_space) 656 *last_space = '\0'; 657} 658 659/* 660 * Given a subdirectory name and "dir" of the current directory, 661 * search the subdir in "dir" and return it, or create a new one if it 662 * does not exist in "dir". 663 * 664 * If "name" has the trailing slash, it'll be excluded in the search. 665 */ 666static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 667 struct untracked_cache_dir *dir, 668 const char *name, int len) 669{ 670 int first, last; 671 struct untracked_cache_dir *d; 672 if (!dir) 673 return NULL; 674 if (len && name[len - 1] == '/') 675 len--; 676 first = 0; 677 last = dir->dirs_nr; 678 while (last > first) { 679 int cmp, next = (last + first) >> 1; 680 d = dir->dirs[next]; 681 cmp = strncmp(name, d->name, len); 682 if (!cmp && strlen(d->name) > len) 683 cmp = -1; 684 if (!cmp) 685 return d; 686 if (cmp < 0) { 687 last = next; 688 continue; 689 } 690 first = next+1; 691 } 692 693 uc->dir_created++; 694 FLEX_ALLOC_MEM(d, name, name, len); 695 696 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc); 697 memmove(dir->dirs + first + 1, dir->dirs + first, 698 (dir->dirs_nr - first) * sizeof(*dir->dirs)); 699 dir->dirs_nr++; 700 dir->dirs[first] = d; 701 return d; 702} 703 704static void do_invalidate_gitignore(struct untracked_cache_dir *dir) 705{ 706 int i; 707 dir->valid = 0; 708 dir->untracked_nr = 0; 709 for (i = 0; i < dir->dirs_nr; i++) 710 do_invalidate_gitignore(dir->dirs[i]); 711} 712 713static void invalidate_gitignore(struct untracked_cache *uc, 714 struct untracked_cache_dir *dir) 715{ 716 uc->gitignore_invalidated++; 717 do_invalidate_gitignore(dir); 718} 719 720static void invalidate_directory(struct untracked_cache *uc, 721 struct untracked_cache_dir *dir) 722{ 723 int i; 724 uc->dir_invalidated++; 725 dir->valid = 0; 726 dir->untracked_nr = 0; 727 for (i = 0; i < dir->dirs_nr; i++) 728 dir->dirs[i]->recurse = 0; 729} 730 731/* 732 * Given a file with name "fname", read it (either from disk, or from 733 * an index if 'istate' is non-null), parse it and store the 734 * exclude rules in "el". 735 * 736 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 737 * stat data from disk (only valid if add_excludes returns zero). If 738 * ss_valid is non-zero, "ss" must contain good value as input. 739 */ 740static int add_excludes(const char *fname, const char *base, int baselen, 741 struct exclude_list *el, 742 struct index_state *istate, 743 struct sha1_stat *sha1_stat) 744{ 745 struct stat st; 746 int fd, i, lineno = 1; 747 size_t size = 0; 748 char *buf, *entry; 749 750 fd = open(fname, O_RDONLY); 751 if (fd < 0 || fstat(fd, &st) < 0) { 752 if (errno != ENOENT) 753 warn_on_inaccessible(fname); 754 if (0 <= fd) 755 close(fd); 756 if (!istate || 757 (buf = read_skip_worktree_file_from_index(istate, fname, &size, sha1_stat)) == NULL) 758 return -1; 759 if (size == 0) { 760 free(buf); 761 return 0; 762 } 763 if (buf[size-1] != '\n') { 764 buf = xrealloc(buf, st_add(size, 1)); 765 buf[size++] = '\n'; 766 } 767 } else { 768 size = xsize_t(st.st_size); 769 if (size == 0) { 770 if (sha1_stat) { 771 fill_stat_data(&sha1_stat->stat, &st); 772 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); 773 sha1_stat->valid = 1; 774 } 775 close(fd); 776 return 0; 777 } 778 buf = xmallocz(size); 779 if (read_in_full(fd, buf, size) != size) { 780 free(buf); 781 close(fd); 782 return -1; 783 } 784 buf[size++] = '\n'; 785 close(fd); 786 if (sha1_stat) { 787 int pos; 788 if (sha1_stat->valid && 789 !match_stat_data_racy(istate, &sha1_stat->stat, &st)) 790 ; /* no content change, ss->sha1 still good */ 791 else if (istate && 792 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 && 793 !ce_stage(istate->cache[pos]) && 794 ce_uptodate(istate->cache[pos]) && 795 !would_convert_to_git(fname)) 796 hashcpy(sha1_stat->sha1, 797 istate->cache[pos]->oid.hash); 798 else 799 hash_sha1_file(buf, size, "blob", sha1_stat->sha1); 800 fill_stat_data(&sha1_stat->stat, &st); 801 sha1_stat->valid = 1; 802 } 803 } 804 805 el->filebuf = buf; 806 807 if (skip_utf8_bom(&buf, size)) 808 size -= buf - el->filebuf; 809 810 entry = buf; 811 812 for (i = 0; i < size; i++) { 813 if (buf[i] == '\n') { 814 if (entry != buf + i && entry[0] != '#') { 815 buf[i - (i && buf[i-1] == '\r')] = 0; 816 trim_trailing_spaces(entry); 817 add_exclude(entry, base, baselen, el, lineno); 818 } 819 lineno++; 820 entry = buf + i + 1; 821 } 822 } 823 return 0; 824} 825 826int add_excludes_from_file_to_list(const char *fname, const char *base, 827 int baselen, struct exclude_list *el, 828 struct index_state *istate) 829{ 830 return add_excludes(fname, base, baselen, el, istate, NULL); 831} 832 833struct exclude_list *add_exclude_list(struct dir_struct *dir, 834 int group_type, const char *src) 835{ 836 struct exclude_list *el; 837 struct exclude_list_group *group; 838 839 group = &dir->exclude_list_group[group_type]; 840 ALLOC_GROW(group->el, group->nr + 1, group->alloc); 841 el = &group->el[group->nr++]; 842 memset(el, 0, sizeof(*el)); 843 el->src = src; 844 return el; 845} 846 847/* 848 * Used to set up core.excludesfile and .git/info/exclude lists. 849 */ 850static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname, 851 struct sha1_stat *sha1_stat) 852{ 853 struct exclude_list *el; 854 /* 855 * catch setup_standard_excludes() that's called before 856 * dir->untracked is assigned. That function behaves 857 * differently when dir->untracked is non-NULL. 858 */ 859 if (!dir->untracked) 860 dir->unmanaged_exclude_files++; 861 el = add_exclude_list(dir, EXC_FILE, fname); 862 if (add_excludes(fname, "", 0, el, NULL, sha1_stat) < 0) 863 die("cannot use %s as an exclude file", fname); 864} 865 866void add_excludes_from_file(struct dir_struct *dir, const char *fname) 867{ 868 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ 869 add_excludes_from_file_1(dir, fname, NULL); 870} 871 872int match_basename(const char *basename, int basenamelen, 873 const char *pattern, int prefix, int patternlen, 874 unsigned flags) 875{ 876 if (prefix == patternlen) { 877 if (patternlen == basenamelen && 878 !fspathncmp(pattern, basename, basenamelen)) 879 return 1; 880 } else if (flags & EXC_FLAG_ENDSWITH) { 881 /* "*literal" matching against "fooliteral" */ 882 if (patternlen - 1 <= basenamelen && 883 !fspathncmp(pattern + 1, 884 basename + basenamelen - (patternlen - 1), 885 patternlen - 1)) 886 return 1; 887 } else { 888 if (fnmatch_icase_mem(pattern, patternlen, 889 basename, basenamelen, 890 0) == 0) 891 return 1; 892 } 893 return 0; 894} 895 896int match_pathname(const char *pathname, int pathlen, 897 const char *base, int baselen, 898 const char *pattern, int prefix, int patternlen, 899 unsigned flags) 900{ 901 const char *name; 902 int namelen; 903 904 /* 905 * match with FNM_PATHNAME; the pattern has base implicitly 906 * in front of it. 907 */ 908 if (*pattern == '/') { 909 pattern++; 910 patternlen--; 911 prefix--; 912 } 913 914 /* 915 * baselen does not count the trailing slash. base[] may or 916 * may not end with a trailing slash though. 917 */ 918 if (pathlen < baselen + 1 || 919 (baselen && pathname[baselen] != '/') || 920 fspathncmp(pathname, base, baselen)) 921 return 0; 922 923 namelen = baselen ? pathlen - baselen - 1 : pathlen; 924 name = pathname + pathlen - namelen; 925 926 if (prefix) { 927 /* 928 * if the non-wildcard part is longer than the 929 * remaining pathname, surely it cannot match. 930 */ 931 if (prefix > namelen) 932 return 0; 933 934 if (fspathncmp(pattern, name, prefix)) 935 return 0; 936 pattern += prefix; 937 patternlen -= prefix; 938 name += prefix; 939 namelen -= prefix; 940 941 /* 942 * If the whole pattern did not have a wildcard, 943 * then our prefix match is all we need; we 944 * do not need to call fnmatch at all. 945 */ 946 if (!patternlen && !namelen) 947 return 1; 948 } 949 950 return fnmatch_icase_mem(pattern, patternlen, 951 name, namelen, 952 WM_PATHNAME) == 0; 953} 954 955/* 956 * Scan the given exclude list in reverse to see whether pathname 957 * should be ignored. The first match (i.e. the last on the list), if 958 * any, determines the fate. Returns the exclude_list element which 959 * matched, or NULL for undecided. 960 */ 961static struct exclude *last_exclude_matching_from_list(const char *pathname, 962 int pathlen, 963 const char *basename, 964 int *dtype, 965 struct exclude_list *el, 966 struct index_state *istate) 967{ 968 struct exclude *exc = NULL; /* undecided */ 969 int i; 970 971 if (!el->nr) 972 return NULL; /* undefined */ 973 974 for (i = el->nr - 1; 0 <= i; i--) { 975 struct exclude *x = el->excludes[i]; 976 const char *exclude = x->pattern; 977 int prefix = x->nowildcardlen; 978 979 if (x->flags & EXC_FLAG_MUSTBEDIR) { 980 if (*dtype == DT_UNKNOWN) 981 *dtype = get_dtype(NULL, istate, pathname, pathlen); 982 if (*dtype != DT_DIR) 983 continue; 984 } 985 986 if (x->flags & EXC_FLAG_NODIR) { 987 if (match_basename(basename, 988 pathlen - (basename - pathname), 989 exclude, prefix, x->patternlen, 990 x->flags)) { 991 exc = x; 992 break; 993 } 994 continue; 995 } 996 997 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/'); 998 if (match_pathname(pathname, pathlen, 999 x->base, x->baselen ? x->baselen - 1 : 0,1000 exclude, prefix, x->patternlen, x->flags)) {1001 exc = x;1002 break;1003 }1004 }1005 return exc;1006}10071008/*1009 * Scan the list and let the last match determine the fate.1010 * Return 1 for exclude, 0 for include and -1 for undecided.1011 */1012int is_excluded_from_list(const char *pathname,1013 int pathlen, const char *basename, int *dtype,1014 struct exclude_list *el, struct index_state *istate)1015{1016 struct exclude *exclude;1017 exclude = last_exclude_matching_from_list(pathname, pathlen, basename,1018 dtype, el, istate);1019 if (exclude)1020 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1021 return -1; /* undecided */1022}10231024static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,1025 struct index_state *istate,1026 const char *pathname, int pathlen, const char *basename,1027 int *dtype_p)1028{1029 int i, j;1030 struct exclude_list_group *group;1031 struct exclude *exclude;1032 for (i = EXC_CMDL; i <= EXC_FILE; i++) {1033 group = &dir->exclude_list_group[i];1034 for (j = group->nr - 1; j >= 0; j--) {1035 exclude = last_exclude_matching_from_list(1036 pathname, pathlen, basename, dtype_p,1037 &group->el[j], istate);1038 if (exclude)1039 return exclude;1040 }1041 }1042 return NULL;1043}10441045/*1046 * Loads the per-directory exclude list for the substring of base1047 * which has a char length of baselen.1048 */1049static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)1050{1051 struct exclude_list_group *group;1052 struct exclude_list *el;1053 struct exclude_stack *stk = NULL;1054 struct untracked_cache_dir *untracked;1055 int current;10561057 group = &dir->exclude_list_group[EXC_DIRS];10581059 /*1060 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1061 * which originate from directories not in the prefix of the1062 * path being checked.1063 */1064 while ((stk = dir->exclude_stack) != NULL) {1065 if (stk->baselen <= baselen &&1066 !strncmp(dir->basebuf.buf, base, stk->baselen))1067 break;1068 el = &group->el[dir->exclude_stack->exclude_ix];1069 dir->exclude_stack = stk->prev;1070 dir->exclude = NULL;1071 free((char *)el->src); /* see strbuf_detach() below */1072 clear_exclude_list(el);1073 free(stk);1074 group->nr--;1075 }10761077 /* Skip traversing into sub directories if the parent is excluded */1078 if (dir->exclude)1079 return;10801081 /*1082 * Lazy initialization. All call sites currently just1083 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1084 * them seems lots of work for little benefit.1085 */1086 if (!dir->basebuf.buf)1087 strbuf_init(&dir->basebuf, PATH_MAX);10881089 /* Read from the parent directories and push them down. */1090 current = stk ? stk->baselen : -1;1091 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);1092 if (dir->untracked)1093 untracked = stk ? stk->ucd : dir->untracked->root;1094 else1095 untracked = NULL;10961097 while (current < baselen) {1098 const char *cp;1099 struct sha1_stat sha1_stat;11001101 stk = xcalloc(1, sizeof(*stk));1102 if (current < 0) {1103 cp = base;1104 current = 0;1105 } else {1106 cp = strchr(base + current + 1, '/');1107 if (!cp)1108 die("oops in prep_exclude");1109 cp++;1110 untracked =1111 lookup_untracked(dir->untracked, untracked,1112 base + current,1113 cp - base - current);1114 }1115 stk->prev = dir->exclude_stack;1116 stk->baselen = cp - base;1117 stk->exclude_ix = group->nr;1118 stk->ucd = untracked;1119 el = add_exclude_list(dir, EXC_DIRS, NULL);1120 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1121 assert(stk->baselen == dir->basebuf.len);11221123 /* Abort if the directory is excluded */1124 if (stk->baselen) {1125 int dt = DT_DIR;1126 dir->basebuf.buf[stk->baselen - 1] = 0;1127 dir->exclude = last_exclude_matching_from_lists(dir,1128 &the_index,1129 dir->basebuf.buf, stk->baselen - 1,1130 dir->basebuf.buf + current, &dt);1131 dir->basebuf.buf[stk->baselen - 1] = '/';1132 if (dir->exclude &&1133 dir->exclude->flags & EXC_FLAG_NEGATIVE)1134 dir->exclude = NULL;1135 if (dir->exclude) {1136 dir->exclude_stack = stk;1137 return;1138 }1139 }11401141 /* Try to read per-directory file */1142 hashclr(sha1_stat.sha1);1143 sha1_stat.valid = 0;1144 if (dir->exclude_per_dir &&1145 /*1146 * If we know that no files have been added in1147 * this directory (i.e. valid_cached_dir() has1148 * been executed and set untracked->valid) ..1149 */1150 (!untracked || !untracked->valid ||1151 /*1152 * .. and .gitignore does not exist before1153 * (i.e. null exclude_sha1). Then we can skip1154 * loading .gitignore, which would result in1155 * ENOENT anyway.1156 */1157 !is_null_sha1(untracked->exclude_sha1))) {1158 /*1159 * dir->basebuf gets reused by the traversal, but we1160 * need fname to remain unchanged to ensure the src1161 * member of each struct exclude correctly1162 * back-references its source file. Other invocations1163 * of add_exclude_list provide stable strings, so we1164 * strbuf_detach() and free() here in the caller.1165 */1166 struct strbuf sb = STRBUF_INIT;1167 strbuf_addbuf(&sb, &dir->basebuf);1168 strbuf_addstr(&sb, dir->exclude_per_dir);1169 el->src = strbuf_detach(&sb, NULL);1170 add_excludes(el->src, el->src, stk->baselen, el, &the_index,1171 untracked ? &sha1_stat : NULL);1172 }1173 /*1174 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1175 * will first be called in valid_cached_dir() then maybe many1176 * times more in last_exclude_matching(). When the cache is1177 * used, last_exclude_matching() will not be called and1178 * reading .gitignore content will be a waste.1179 *1180 * So when it's called by valid_cached_dir() and we can get1181 * .gitignore SHA-1 from the index (i.e. .gitignore is not1182 * modified on work tree), we could delay reading the1183 * .gitignore content until we absolutely need it in1184 * last_exclude_matching(). Be careful about ignore rule1185 * order, though, if you do that.1186 */1187 if (untracked &&1188 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {1189 invalidate_gitignore(dir->untracked, untracked);1190 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);1191 }1192 dir->exclude_stack = stk;1193 current = stk->baselen;1194 }1195 strbuf_setlen(&dir->basebuf, baselen);1196}11971198/*1199 * Loads the exclude lists for the directory containing pathname, then1200 * scans all exclude lists to determine whether pathname is excluded.1201 * Returns the exclude_list element which matched, or NULL for1202 * undecided.1203 */1204struct exclude *last_exclude_matching(struct dir_struct *dir,1205 const char *pathname,1206 int *dtype_p)1207{1208 int pathlen = strlen(pathname);1209 const char *basename = strrchr(pathname, '/');1210 basename = (basename) ? basename+1 : pathname;12111212 prep_exclude(dir, pathname, basename-pathname);12131214 if (dir->exclude)1215 return dir->exclude;12161217 return last_exclude_matching_from_lists(dir, &the_index, pathname, pathlen,1218 basename, dtype_p);1219}12201221/*1222 * Loads the exclude lists for the directory containing pathname, then1223 * scans all exclude lists to determine whether pathname is excluded.1224 * Returns 1 if true, otherwise 0.1225 */1226int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)1227{1228 struct exclude *exclude =1229 last_exclude_matching(dir, pathname, dtype_p);1230 if (exclude)1231 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1232 return 0;1233}12341235static struct dir_entry *dir_entry_new(const char *pathname, int len)1236{1237 struct dir_entry *ent;12381239 FLEX_ALLOC_MEM(ent, name, pathname, len);1240 ent->len = len;1241 return ent;1242}12431244static struct dir_entry *dir_add_name(struct dir_struct *dir,1245 struct index_state *istate,1246 const char *pathname, int len)1247{1248 if (index_file_exists(istate, pathname, len, ignore_case))1249 return NULL;12501251 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1252 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);1253}12541255struct dir_entry *dir_add_ignored(struct dir_struct *dir,1256 struct index_state *istate,1257 const char *pathname, int len)1258{1259 if (!index_name_is_other(istate, pathname, len))1260 return NULL;12611262 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1263 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);1264}12651266enum exist_status {1267 index_nonexistent = 0,1268 index_directory,1269 index_gitdir1270};12711272/*1273 * Do not use the alphabetically sorted index to look up1274 * the directory name; instead, use the case insensitive1275 * directory hash.1276 */1277static enum exist_status directory_exists_in_index_icase(struct index_state *istate,1278 const char *dirname, int len)1279{1280 struct cache_entry *ce;12811282 if (index_dir_exists(istate, dirname, len))1283 return index_directory;12841285 ce = index_file_exists(istate, dirname, len, ignore_case);1286 if (ce && S_ISGITLINK(ce->ce_mode))1287 return index_gitdir;12881289 return index_nonexistent;1290}12911292/*1293 * The index sorts alphabetically by entry name, which1294 * means that a gitlink sorts as '\0' at the end, while1295 * a directory (which is defined not as an entry, but as1296 * the files it contains) will sort with the '/' at the1297 * end.1298 */1299static enum exist_status directory_exists_in_index(struct index_state *istate,1300 const char *dirname, int len)1301{1302 int pos;13031304 if (ignore_case)1305 return directory_exists_in_index_icase(istate, dirname, len);13061307 pos = index_name_pos(istate, dirname, len);1308 if (pos < 0)1309 pos = -pos-1;1310 while (pos < istate->cache_nr) {1311 const struct cache_entry *ce = istate->cache[pos++];1312 unsigned char endchar;13131314 if (strncmp(ce->name, dirname, len))1315 break;1316 endchar = ce->name[len];1317 if (endchar > '/')1318 break;1319 if (endchar == '/')1320 return index_directory;1321 if (!endchar && S_ISGITLINK(ce->ce_mode))1322 return index_gitdir;1323 }1324 return index_nonexistent;1325}13261327/*1328 * When we find a directory when traversing the filesystem, we1329 * have three distinct cases:1330 *1331 * - ignore it1332 * - see it as a directory1333 * - recurse into it1334 *1335 * and which one we choose depends on a combination of existing1336 * git index contents and the flags passed into the directory1337 * traversal routine.1338 *1339 * Case 1: If we *already* have entries in the index under that1340 * directory name, we always recurse into the directory to see1341 * all the files.1342 *1343 * Case 2: If we *already* have that directory name as a gitlink,1344 * we always continue to see it as a gitlink, regardless of whether1345 * there is an actual git directory there or not (it might not1346 * be checked out as a subproject!)1347 *1348 * Case 3: if we didn't have it in the index previously, we1349 * have a few sub-cases:1350 *1351 * (a) if "show_other_directories" is true, we show it as1352 * just a directory, unless "hide_empty_directories" is1353 * also true, in which case we need to check if it contains any1354 * untracked and / or ignored files.1355 * (b) if it looks like a git directory, and we don't have1356 * 'no_gitlinks' set we treat it as a gitlink, and show it1357 * as a directory.1358 * (c) otherwise, we recurse into it.1359 */1360static enum path_treatment treat_directory(struct dir_struct *dir,1361 struct untracked_cache_dir *untracked,1362 const char *dirname, int len, int baselen, int exclude,1363 const struct pathspec *pathspec)1364{1365 /* The "len-1" is to strip the final '/' */1366 switch (directory_exists_in_index(&the_index, dirname, len-1)) {1367 case index_directory:1368 return path_recurse;13691370 case index_gitdir:1371 return path_none;13721373 case index_nonexistent:1374 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1375 break;1376 if (!(dir->flags & DIR_NO_GITLINKS)) {1377 unsigned char sha1[20];1378 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)1379 return path_untracked;1380 }1381 return path_recurse;1382 }13831384 /* This is the "show_other_directories" case */13851386 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1387 return exclude ? path_excluded : path_untracked;13881389 untracked = lookup_untracked(dir->untracked, untracked,1390 dirname + baselen, len - baselen);1391 return read_directory_recursive(dir, dirname, len,1392 untracked, 1, pathspec);1393}13941395/*1396 * This is an inexact early pruning of any recursive directory1397 * reading - if the path cannot possibly be in the pathspec,1398 * return true, and we'll skip it early.1399 */1400static int simplify_away(const char *path, int pathlen,1401 const struct pathspec *pathspec)1402{1403 int i;14041405 if (!pathspec || !pathspec->nr)1406 return 0;14071408 GUARD_PATHSPEC(pathspec,1409 PATHSPEC_FROMTOP |1410 PATHSPEC_MAXDEPTH |1411 PATHSPEC_LITERAL |1412 PATHSPEC_GLOB |1413 PATHSPEC_ICASE |1414 PATHSPEC_EXCLUDE |1415 PATHSPEC_ATTR);14161417 for (i = 0; i < pathspec->nr; i++) {1418 const struct pathspec_item *item = &pathspec->items[i];1419 int len = item->nowildcard_len;14201421 if (len > pathlen)1422 len = pathlen;1423 if (!ps_strncmp(item, item->match, path, len))1424 return 0;1425 }14261427 return 1;1428}14291430/*1431 * This function tells us whether an excluded path matches a1432 * list of "interesting" pathspecs. That is, whether a path matched1433 * by any of the pathspecs could possibly be ignored by excluding1434 * the specified path. This can happen if:1435 *1436 * 1. the path is mentioned explicitly in the pathspec1437 *1438 * 2. the path is a directory prefix of some element in the1439 * pathspec1440 */1441static int exclude_matches_pathspec(const char *path, int pathlen,1442 const struct pathspec *pathspec)1443{1444 int i;14451446 if (!pathspec || !pathspec->nr)1447 return 0;14481449 GUARD_PATHSPEC(pathspec,1450 PATHSPEC_FROMTOP |1451 PATHSPEC_MAXDEPTH |1452 PATHSPEC_LITERAL |1453 PATHSPEC_GLOB |1454 PATHSPEC_ICASE |1455 PATHSPEC_EXCLUDE);14561457 for (i = 0; i < pathspec->nr; i++) {1458 const struct pathspec_item *item = &pathspec->items[i];1459 int len = item->nowildcard_len;14601461 if (len == pathlen &&1462 !ps_strncmp(item, item->match, path, pathlen))1463 return 1;1464 if (len > pathlen &&1465 item->match[pathlen] == '/' &&1466 !ps_strncmp(item, item->match, path, pathlen))1467 return 1;1468 }1469 return 0;1470}14711472static int get_index_dtype(struct index_state *istate,1473 const char *path, int len)1474{1475 int pos;1476 const struct cache_entry *ce;14771478 ce = index_file_exists(istate, path, len, 0);1479 if (ce) {1480 if (!ce_uptodate(ce))1481 return DT_UNKNOWN;1482 if (S_ISGITLINK(ce->ce_mode))1483 return DT_DIR;1484 /*1485 * Nobody actually cares about the1486 * difference between DT_LNK and DT_REG1487 */1488 return DT_REG;1489 }14901491 /* Try to look it up as a directory */1492 pos = index_name_pos(istate, path, len);1493 if (pos >= 0)1494 return DT_UNKNOWN;1495 pos = -pos-1;1496 while (pos < istate->cache_nr) {1497 ce = istate->cache[pos++];1498 if (strncmp(ce->name, path, len))1499 break;1500 if (ce->name[len] > '/')1501 break;1502 if (ce->name[len] < '/')1503 continue;1504 if (!ce_uptodate(ce))1505 break; /* continue? */1506 return DT_DIR;1507 }1508 return DT_UNKNOWN;1509}15101511static int get_dtype(struct dirent *de, struct index_state *istate,1512 const char *path, int len)1513{1514 int dtype = de ? DTYPE(de) : DT_UNKNOWN;1515 struct stat st;15161517 if (dtype != DT_UNKNOWN)1518 return dtype;1519 dtype = get_index_dtype(istate, path, len);1520 if (dtype != DT_UNKNOWN)1521 return dtype;1522 if (lstat(path, &st))1523 return dtype;1524 if (S_ISREG(st.st_mode))1525 return DT_REG;1526 if (S_ISDIR(st.st_mode))1527 return DT_DIR;1528 if (S_ISLNK(st.st_mode))1529 return DT_LNK;1530 return dtype;1531}15321533static enum path_treatment treat_one_path(struct dir_struct *dir,1534 struct untracked_cache_dir *untracked,1535 struct strbuf *path,1536 int baselen,1537 const struct pathspec *pathspec,1538 int dtype, struct dirent *de)1539{1540 int exclude;1541 int has_path_in_index = !!index_file_exists(&the_index, path->buf, path->len, ignore_case);15421543 if (dtype == DT_UNKNOWN)1544 dtype = get_dtype(de, &the_index, path->buf, path->len);15451546 /* Always exclude indexed files */1547 if (dtype != DT_DIR && has_path_in_index)1548 return path_none;15491550 /*1551 * When we are looking at a directory P in the working tree,1552 * there are three cases:1553 *1554 * (1) P exists in the index. Everything inside the directory P in1555 * the working tree needs to go when P is checked out from the1556 * index.1557 *1558 * (2) P does not exist in the index, but there is P/Q in the index.1559 * We know P will stay a directory when we check out the contents1560 * of the index, but we do not know yet if there is a directory1561 * P/Q in the working tree to be killed, so we need to recurse.1562 *1563 * (3) P does not exist in the index, and there is no P/Q in the index1564 * to require P to be a directory, either. Only in this case, we1565 * know that everything inside P will not be killed without1566 * recursing.1567 */1568 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1569 (dtype == DT_DIR) &&1570 !has_path_in_index &&1571 (directory_exists_in_index(&the_index, path->buf, path->len) == index_nonexistent))1572 return path_none;15731574 exclude = is_excluded(dir, path->buf, &dtype);15751576 /*1577 * Excluded? If we don't explicitly want to show1578 * ignored files, ignore it1579 */1580 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1581 return path_excluded;15821583 switch (dtype) {1584 default:1585 return path_none;1586 case DT_DIR:1587 strbuf_addch(path, '/');1588 return treat_directory(dir, untracked, path->buf, path->len,1589 baselen, exclude, pathspec);1590 case DT_REG:1591 case DT_LNK:1592 return exclude ? path_excluded : path_untracked;1593 }1594}15951596static enum path_treatment treat_path_fast(struct dir_struct *dir,1597 struct untracked_cache_dir *untracked,1598 struct cached_dir *cdir,1599 struct strbuf *path,1600 int baselen,1601 const struct pathspec *pathspec)1602{1603 strbuf_setlen(path, baselen);1604 if (!cdir->ucd) {1605 strbuf_addstr(path, cdir->file);1606 return path_untracked;1607 }1608 strbuf_addstr(path, cdir->ucd->name);1609 /* treat_one_path() does this before it calls treat_directory() */1610 strbuf_complete(path, '/');1611 if (cdir->ucd->check_only)1612 /*1613 * check_only is set as a result of treat_directory() getting1614 * to its bottom. Verify again the same set of directories1615 * with check_only set.1616 */1617 return read_directory_recursive(dir, path->buf, path->len,1618 cdir->ucd, 1, pathspec);1619 /*1620 * We get path_recurse in the first run when1621 * directory_exists_in_index() returns index_nonexistent. We1622 * are sure that new changes in the index does not impact the1623 * outcome. Return now.1624 */1625 return path_recurse;1626}16271628static enum path_treatment treat_path(struct dir_struct *dir,1629 struct untracked_cache_dir *untracked,1630 struct cached_dir *cdir,1631 struct strbuf *path,1632 int baselen,1633 const struct pathspec *pathspec)1634{1635 int dtype;1636 struct dirent *de = cdir->de;16371638 if (!de)1639 return treat_path_fast(dir, untracked, cdir, path,1640 baselen, pathspec);1641 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))1642 return path_none;1643 strbuf_setlen(path, baselen);1644 strbuf_addstr(path, de->d_name);1645 if (simplify_away(path->buf, path->len, pathspec))1646 return path_none;16471648 dtype = DTYPE(de);1649 return treat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);1650}16511652static void add_untracked(struct untracked_cache_dir *dir, const char *name)1653{1654 if (!dir)1655 return;1656 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,1657 dir->untracked_alloc);1658 dir->untracked[dir->untracked_nr++] = xstrdup(name);1659}16601661static int valid_cached_dir(struct dir_struct *dir,1662 struct untracked_cache_dir *untracked,1663 struct strbuf *path,1664 int check_only)1665{1666 struct stat st;16671668 if (!untracked)1669 return 0;16701671 if (stat(path->len ? path->buf : ".", &st)) {1672 invalidate_directory(dir->untracked, untracked);1673 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));1674 return 0;1675 }1676 if (!untracked->valid ||1677 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {1678 if (untracked->valid)1679 invalidate_directory(dir->untracked, untracked);1680 fill_stat_data(&untracked->stat_data, &st);1681 return 0;1682 }16831684 if (untracked->check_only != !!check_only) {1685 invalidate_directory(dir->untracked, untracked);1686 return 0;1687 }16881689 /*1690 * prep_exclude will be called eventually on this directory,1691 * but it's called much later in last_exclude_matching(). We1692 * need it now to determine the validity of the cache for this1693 * path. The next calls will be nearly no-op, the way1694 * prep_exclude() is designed.1695 */1696 if (path->len && path->buf[path->len - 1] != '/') {1697 strbuf_addch(path, '/');1698 prep_exclude(dir, path->buf, path->len);1699 strbuf_setlen(path, path->len - 1);1700 } else1701 prep_exclude(dir, path->buf, path->len);17021703 /* hopefully prep_exclude() haven't invalidated this entry... */1704 return untracked->valid;1705}17061707static int open_cached_dir(struct cached_dir *cdir,1708 struct dir_struct *dir,1709 struct untracked_cache_dir *untracked,1710 struct strbuf *path,1711 int check_only)1712{1713 memset(cdir, 0, sizeof(*cdir));1714 cdir->untracked = untracked;1715 if (valid_cached_dir(dir, untracked, path, check_only))1716 return 0;1717 cdir->fdir = opendir(path->len ? path->buf : ".");1718 if (dir->untracked)1719 dir->untracked->dir_opened++;1720 if (!cdir->fdir)1721 return -1;1722 return 0;1723}17241725static int read_cached_dir(struct cached_dir *cdir)1726{1727 if (cdir->fdir) {1728 cdir->de = readdir(cdir->fdir);1729 if (!cdir->de)1730 return -1;1731 return 0;1732 }1733 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {1734 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1735 if (!d->recurse) {1736 cdir->nr_dirs++;1737 continue;1738 }1739 cdir->ucd = d;1740 cdir->nr_dirs++;1741 return 0;1742 }1743 cdir->ucd = NULL;1744 if (cdir->nr_files < cdir->untracked->untracked_nr) {1745 struct untracked_cache_dir *d = cdir->untracked;1746 cdir->file = d->untracked[cdir->nr_files++];1747 return 0;1748 }1749 return -1;1750}17511752static void close_cached_dir(struct cached_dir *cdir)1753{1754 if (cdir->fdir)1755 closedir(cdir->fdir);1756 /*1757 * We have gone through this directory and found no untracked1758 * entries. Mark it valid.1759 */1760 if (cdir->untracked) {1761 cdir->untracked->valid = 1;1762 cdir->untracked->recurse = 1;1763 }1764}17651766/*1767 * Read a directory tree. We currently ignore anything but1768 * directories, regular files and symlinks. That's because git1769 * doesn't handle them at all yet. Maybe that will change some1770 * day.1771 *1772 * Also, we ignore the name ".git" (even if it is not a directory).1773 * That likely will not change.1774 *1775 * Returns the most significant path_treatment value encountered in the scan.1776 */1777static enum path_treatment read_directory_recursive(struct dir_struct *dir,1778 const char *base, int baselen,1779 struct untracked_cache_dir *untracked, int check_only,1780 const struct pathspec *pathspec)1781{1782 struct cached_dir cdir;1783 enum path_treatment state, subdir_state, dir_state = path_none;1784 struct strbuf path = STRBUF_INIT;17851786 strbuf_add(&path, base, baselen);17871788 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))1789 goto out;17901791 if (untracked)1792 untracked->check_only = !!check_only;17931794 while (!read_cached_dir(&cdir)) {1795 /* check how the file or directory should be treated */1796 state = treat_path(dir, untracked, &cdir, &path,1797 baselen, pathspec);17981799 if (state > dir_state)1800 dir_state = state;18011802 /* recurse into subdir if instructed by treat_path */1803 if (state == path_recurse) {1804 struct untracked_cache_dir *ud;1805 ud = lookup_untracked(dir->untracked, untracked,1806 path.buf + baselen,1807 path.len - baselen);1808 subdir_state =1809 read_directory_recursive(dir, path.buf,1810 path.len, ud,1811 check_only, pathspec);1812 if (subdir_state > dir_state)1813 dir_state = subdir_state;1814 }18151816 if (check_only) {1817 /* abort early if maximum state has been reached */1818 if (dir_state == path_untracked) {1819 if (cdir.fdir)1820 add_untracked(untracked, path.buf + baselen);1821 break;1822 }1823 /* skip the dir_add_* part */1824 continue;1825 }18261827 /* add the path to the appropriate result list */1828 switch (state) {1829 case path_excluded:1830 if (dir->flags & DIR_SHOW_IGNORED)1831 dir_add_name(dir, &the_index, path.buf, path.len);1832 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||1833 ((dir->flags & DIR_COLLECT_IGNORED) &&1834 exclude_matches_pathspec(path.buf, path.len,1835 pathspec)))1836 dir_add_ignored(dir, &the_index, path.buf, path.len);1837 break;18381839 case path_untracked:1840 if (dir->flags & DIR_SHOW_IGNORED)1841 break;1842 dir_add_name(dir, &the_index, path.buf, path.len);1843 if (cdir.fdir)1844 add_untracked(untracked, path.buf + baselen);1845 break;18461847 default:1848 break;1849 }1850 }1851 close_cached_dir(&cdir);1852 out:1853 strbuf_release(&path);18541855 return dir_state;1856}18571858static int cmp_name(const void *p1, const void *p2)1859{1860 const struct dir_entry *e1 = *(const struct dir_entry **)p1;1861 const struct dir_entry *e2 = *(const struct dir_entry **)p2;18621863 return name_compare(e1->name, e1->len, e2->name, e2->len);1864}18651866static int treat_leading_path(struct dir_struct *dir,1867 const char *path, int len,1868 const struct pathspec *pathspec)1869{1870 struct strbuf sb = STRBUF_INIT;1871 int baselen, rc = 0;1872 const char *cp;1873 int old_flags = dir->flags;18741875 while (len && path[len - 1] == '/')1876 len--;1877 if (!len)1878 return 1;1879 baselen = 0;1880 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;1881 while (1) {1882 cp = path + baselen + !!baselen;1883 cp = memchr(cp, '/', path + len - cp);1884 if (!cp)1885 baselen = len;1886 else1887 baselen = cp - path;1888 strbuf_setlen(&sb, 0);1889 strbuf_add(&sb, path, baselen);1890 if (!is_directory(sb.buf))1891 break;1892 if (simplify_away(sb.buf, sb.len, pathspec))1893 break;1894 if (treat_one_path(dir, NULL, &sb, baselen, pathspec,1895 DT_DIR, NULL) == path_none)1896 break; /* do not recurse into it */1897 if (len <= baselen) {1898 rc = 1;1899 break; /* finished checking */1900 }1901 }1902 strbuf_release(&sb);1903 dir->flags = old_flags;1904 return rc;1905}19061907static const char *get_ident_string(void)1908{1909 static struct strbuf sb = STRBUF_INIT;1910 struct utsname uts;19111912 if (sb.len)1913 return sb.buf;1914 if (uname(&uts) < 0)1915 die_errno(_("failed to get kernel name and information"));1916 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),1917 uts.sysname);1918 return sb.buf;1919}19201921static int ident_in_untracked(const struct untracked_cache *uc)1922{1923 /*1924 * Previous git versions may have saved many NUL separated1925 * strings in the "ident" field, but it is insane to manage1926 * many locations, so just take care of the first one.1927 */19281929 return !strcmp(uc->ident.buf, get_ident_string());1930}19311932static void set_untracked_ident(struct untracked_cache *uc)1933{1934 strbuf_reset(&uc->ident);1935 strbuf_addstr(&uc->ident, get_ident_string());19361937 /*1938 * This strbuf used to contain a list of NUL separated1939 * strings, so save NUL too for backward compatibility.1940 */1941 strbuf_addch(&uc->ident, 0);1942}19431944static void new_untracked_cache(struct index_state *istate)1945{1946 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));1947 strbuf_init(&uc->ident, 100);1948 uc->exclude_per_dir = ".gitignore";1949 /* should be the same flags used by git-status */1950 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;1951 set_untracked_ident(uc);1952 istate->untracked = uc;1953 istate->cache_changed |= UNTRACKED_CHANGED;1954}19551956void add_untracked_cache(struct index_state *istate)1957{1958 if (!istate->untracked) {1959 new_untracked_cache(istate);1960 } else {1961 if (!ident_in_untracked(istate->untracked)) {1962 free_untracked_cache(istate->untracked);1963 new_untracked_cache(istate);1964 }1965 }1966}19671968void remove_untracked_cache(struct index_state *istate)1969{1970 if (istate->untracked) {1971 free_untracked_cache(istate->untracked);1972 istate->untracked = NULL;1973 istate->cache_changed |= UNTRACKED_CHANGED;1974 }1975}19761977static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,1978 int base_len,1979 const struct pathspec *pathspec)1980{1981 struct untracked_cache_dir *root;19821983 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))1984 return NULL;19851986 /*1987 * We only support $GIT_DIR/info/exclude and core.excludesfile1988 * as the global ignore rule files. Any other additions1989 * (e.g. from command line) invalidate the cache. This1990 * condition also catches running setup_standard_excludes()1991 * before setting dir->untracked!1992 */1993 if (dir->unmanaged_exclude_files)1994 return NULL;19951996 /*1997 * Optimize for the main use case only: whole-tree git1998 * status. More work involved in treat_leading_path() if we1999 * use cache on just a subset of the worktree. pathspec2000 * support could make the matter even worse.2001 */2002 if (base_len || (pathspec && pathspec->nr))2003 return NULL;20042005 /* Different set of flags may produce different results */2006 if (dir->flags != dir->untracked->dir_flags ||2007 /*2008 * See treat_directory(), case index_nonexistent. Without2009 * this flag, we may need to also cache .git file content2010 * for the resolve_gitlink_ref() call, which we don't.2011 */2012 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||2013 /* We don't support collecting ignore files */2014 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |2015 DIR_COLLECT_IGNORED)))2016 return NULL;20172018 /*2019 * If we use .gitignore in the cache and now you change it to2020 * .gitexclude, everything will go wrong.2021 */2022 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&2023 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))2024 return NULL;20252026 /*2027 * EXC_CMDL is not considered in the cache. If people set it,2028 * skip the cache.2029 */2030 if (dir->exclude_list_group[EXC_CMDL].nr)2031 return NULL;20322033 if (!ident_in_untracked(dir->untracked)) {2034 warning(_("Untracked cache is disabled on this system or location."));2035 return NULL;2036 }20372038 if (!dir->untracked->root) {2039 const int len = sizeof(*dir->untracked->root);2040 dir->untracked->root = xmalloc(len);2041 memset(dir->untracked->root, 0, len);2042 }20432044 /* Validate $GIT_DIR/info/exclude and core.excludesfile */2045 root = dir->untracked->root;2046 if (hashcmp(dir->ss_info_exclude.sha1,2047 dir->untracked->ss_info_exclude.sha1)) {2048 invalidate_gitignore(dir->untracked, root);2049 dir->untracked->ss_info_exclude = dir->ss_info_exclude;2050 }2051 if (hashcmp(dir->ss_excludes_file.sha1,2052 dir->untracked->ss_excludes_file.sha1)) {2053 invalidate_gitignore(dir->untracked, root);2054 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2055 }20562057 /* Make sure this directory is not dropped out at saving phase */2058 root->recurse = 1;2059 return root;2060}20612062int read_directory(struct dir_struct *dir, const char *path,2063 int len, const struct pathspec *pathspec)2064{2065 struct untracked_cache_dir *untracked;20662067 if (has_symlink_leading_path(path, len))2068 return dir->nr;20692070 untracked = validate_untracked_cache(dir, len, pathspec);2071 if (!untracked)2072 /*2073 * make sure untracked cache code path is disabled,2074 * e.g. prep_exclude()2075 */2076 dir->untracked = NULL;2077 if (!len || treat_leading_path(dir, path, len, pathspec))2078 read_directory_recursive(dir, path, len, untracked, 0, pathspec);2079 QSORT(dir->entries, dir->nr, cmp_name);2080 QSORT(dir->ignored, dir->ignored_nr, cmp_name);2081 if (dir->untracked) {2082 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);2083 trace_printf_key(&trace_untracked_stats,2084 "node creation: %u\n"2085 "gitignore invalidation: %u\n"2086 "directory invalidation: %u\n"2087 "opendir: %u\n",2088 dir->untracked->dir_created,2089 dir->untracked->gitignore_invalidated,2090 dir->untracked->dir_invalidated,2091 dir->untracked->dir_opened);2092 if (dir->untracked == the_index.untracked &&2093 (dir->untracked->dir_opened ||2094 dir->untracked->gitignore_invalidated ||2095 dir->untracked->dir_invalidated))2096 the_index.cache_changed |= UNTRACKED_CHANGED;2097 if (dir->untracked != the_index.untracked) {2098 free(dir->untracked);2099 dir->untracked = NULL;2100 }2101 }2102 return dir->nr;2103}21042105int file_exists(const char *f)2106{2107 struct stat sb;2108 return lstat(f, &sb) == 0;2109}21102111static int cmp_icase(char a, char b)2112{2113 if (a == b)2114 return 0;2115 if (ignore_case)2116 return toupper(a) - toupper(b);2117 return a - b;2118}21192120/*2121 * Given two normalized paths (a trailing slash is ok), if subdir is2122 * outside dir, return -1. Otherwise return the offset in subdir that2123 * can be used as relative path to dir.2124 */2125int dir_inside_of(const char *subdir, const char *dir)2126{2127 int offset = 0;21282129 assert(dir && subdir && *dir && *subdir);21302131 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {2132 dir++;2133 subdir++;2134 offset++;2135 }21362137 /* hel[p]/me vs hel[l]/yeah */2138 if (*dir && *subdir)2139 return -1;21402141 if (!*subdir)2142 return !*dir ? offset : -1; /* same dir */21432144 /* foo/[b]ar vs foo/[] */2145 if (is_dir_sep(dir[-1]))2146 return is_dir_sep(subdir[-1]) ? offset : -1;21472148 /* foo[/]bar vs foo[] */2149 return is_dir_sep(*subdir) ? offset + 1 : -1;2150}21512152int is_inside_dir(const char *dir)2153{2154 char *cwd;2155 int rc;21562157 if (!dir)2158 return 0;21592160 cwd = xgetcwd();2161 rc = (dir_inside_of(cwd, dir) >= 0);2162 free(cwd);2163 return rc;2164}21652166int is_empty_dir(const char *path)2167{2168 DIR *dir = opendir(path);2169 struct dirent *e;2170 int ret = 1;21712172 if (!dir)2173 return 0;21742175 while ((e = readdir(dir)) != NULL)2176 if (!is_dot_or_dotdot(e->d_name)) {2177 ret = 0;2178 break;2179 }21802181 closedir(dir);2182 return ret;2183}21842185static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)2186{2187 DIR *dir;2188 struct dirent *e;2189 int ret = 0, original_len = path->len, len, kept_down = 0;2190 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2191 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2192 unsigned char submodule_head[20];21932194 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2195 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {2196 /* Do not descend and nuke a nested git work tree. */2197 if (kept_up)2198 *kept_up = 1;2199 return 0;2200 }22012202 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2203 dir = opendir(path->buf);2204 if (!dir) {2205 if (errno == ENOENT)2206 return keep_toplevel ? -1 : 0;2207 else if (errno == EACCES && !keep_toplevel)2208 /*2209 * An empty dir could be removable even if it2210 * is unreadable:2211 */2212 return rmdir(path->buf);2213 else2214 return -1;2215 }2216 strbuf_complete(path, '/');22172218 len = path->len;2219 while ((e = readdir(dir)) != NULL) {2220 struct stat st;2221 if (is_dot_or_dotdot(e->d_name))2222 continue;22232224 strbuf_setlen(path, len);2225 strbuf_addstr(path, e->d_name);2226 if (lstat(path->buf, &st)) {2227 if (errno == ENOENT)2228 /*2229 * file disappeared, which is what we2230 * wanted anyway2231 */2232 continue;2233 /* fall thru */2234 } else if (S_ISDIR(st.st_mode)) {2235 if (!remove_dir_recurse(path, flag, &kept_down))2236 continue; /* happy */2237 } else if (!only_empty &&2238 (!unlink(path->buf) || errno == ENOENT)) {2239 continue; /* happy, too */2240 }22412242 /* path too long, stat fails, or non-directory still exists */2243 ret = -1;2244 break;2245 }2246 closedir(dir);22472248 strbuf_setlen(path, original_len);2249 if (!ret && !keep_toplevel && !kept_down)2250 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;2251 else if (kept_up)2252 /*2253 * report the uplevel that it is not an error that we2254 * did not rmdir() our directory.2255 */2256 *kept_up = !ret;2257 return ret;2258}22592260int remove_dir_recursively(struct strbuf *path, int flag)2261{2262 return remove_dir_recurse(path, flag, NULL);2263}22642265static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")22662267void setup_standard_excludes(struct dir_struct *dir)2268{2269 dir->exclude_per_dir = ".gitignore";22702271 /* core.excludefile defaulting to $XDG_HOME/git/ignore */2272 if (!excludes_file)2273 excludes_file = xdg_config_home("ignore");2274 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))2275 add_excludes_from_file_1(dir, excludes_file,2276 dir->untracked ? &dir->ss_excludes_file : NULL);22772278 /* per repository user preference */2279 if (startup_info->have_repository) {2280 const char *path = git_path_info_exclude();2281 if (!access_or_warn(path, R_OK, 0))2282 add_excludes_from_file_1(dir, path,2283 dir->untracked ? &dir->ss_info_exclude : NULL);2284 }2285}22862287int remove_path(const char *name)2288{2289 char *slash;22902291 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)2292 return -1;22932294 slash = strrchr(name, '/');2295 if (slash) {2296 char *dirs = xstrdup(name);2297 slash = dirs + (slash - name);2298 do {2299 *slash = '\0';2300 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));2301 free(dirs);2302 }2303 return 0;2304}23052306/*2307 * Frees memory within dir which was allocated for exclude lists and2308 * the exclude_stack. Does not free dir itself.2309 */2310void clear_directory(struct dir_struct *dir)2311{2312 int i, j;2313 struct exclude_list_group *group;2314 struct exclude_list *el;2315 struct exclude_stack *stk;23162317 for (i = EXC_CMDL; i <= EXC_FILE; i++) {2318 group = &dir->exclude_list_group[i];2319 for (j = 0; j < group->nr; j++) {2320 el = &group->el[j];2321 if (i == EXC_DIRS)2322 free((char *)el->src);2323 clear_exclude_list(el);2324 }2325 free(group->el);2326 }23272328 stk = dir->exclude_stack;2329 while (stk) {2330 struct exclude_stack *prev = stk->prev;2331 free(stk);2332 stk = prev;2333 }2334 strbuf_release(&dir->basebuf);2335}23362337struct ondisk_untracked_cache {2338 struct stat_data info_exclude_stat;2339 struct stat_data excludes_file_stat;2340 uint32_t dir_flags;2341 unsigned char info_exclude_sha1[20];2342 unsigned char excludes_file_sha1[20];2343 char exclude_per_dir[FLEX_ARRAY];2344};23452346#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)23472348struct write_data {2349 int index; /* number of written untracked_cache_dir */2350 struct ewah_bitmap *check_only; /* from untracked_cache_dir */2351 struct ewah_bitmap *valid; /* from untracked_cache_dir */2352 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */2353 struct strbuf out;2354 struct strbuf sb_stat;2355 struct strbuf sb_sha1;2356};23572358static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)2359{2360 to->sd_ctime.sec = htonl(from->sd_ctime.sec);2361 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);2362 to->sd_mtime.sec = htonl(from->sd_mtime.sec);2363 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);2364 to->sd_dev = htonl(from->sd_dev);2365 to->sd_ino = htonl(from->sd_ino);2366 to->sd_uid = htonl(from->sd_uid);2367 to->sd_gid = htonl(from->sd_gid);2368 to->sd_size = htonl(from->sd_size);2369}23702371static void write_one_dir(struct untracked_cache_dir *untracked,2372 struct write_data *wd)2373{2374 struct stat_data stat_data;2375 struct strbuf *out = &wd->out;2376 unsigned char intbuf[16];2377 unsigned int intlen, value;2378 int i = wd->index++;23792380 /*2381 * untracked_nr should be reset whenever valid is clear, but2382 * for safety..2383 */2384 if (!untracked->valid) {2385 untracked->untracked_nr = 0;2386 untracked->check_only = 0;2387 }23882389 if (untracked->check_only)2390 ewah_set(wd->check_only, i);2391 if (untracked->valid) {2392 ewah_set(wd->valid, i);2393 stat_data_to_disk(&stat_data, &untracked->stat_data);2394 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));2395 }2396 if (!is_null_sha1(untracked->exclude_sha1)) {2397 ewah_set(wd->sha1_valid, i);2398 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);2399 }24002401 intlen = encode_varint(untracked->untracked_nr, intbuf);2402 strbuf_add(out, intbuf, intlen);24032404 /* skip non-recurse directories */2405 for (i = 0, value = 0; i < untracked->dirs_nr; i++)2406 if (untracked->dirs[i]->recurse)2407 value++;2408 intlen = encode_varint(value, intbuf);2409 strbuf_add(out, intbuf, intlen);24102411 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);24122413 for (i = 0; i < untracked->untracked_nr; i++)2414 strbuf_add(out, untracked->untracked[i],2415 strlen(untracked->untracked[i]) + 1);24162417 for (i = 0; i < untracked->dirs_nr; i++)2418 if (untracked->dirs[i]->recurse)2419 write_one_dir(untracked->dirs[i], wd);2420}24212422void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)2423{2424 struct ondisk_untracked_cache *ouc;2425 struct write_data wd;2426 unsigned char varbuf[16];2427 int varint_len;2428 size_t len = strlen(untracked->exclude_per_dir);24292430 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);2431 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2432 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2433 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);2434 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);2435 ouc->dir_flags = htonl(untracked->dir_flags);24362437 varint_len = encode_varint(untracked->ident.len, varbuf);2438 strbuf_add(out, varbuf, varint_len);2439 strbuf_addbuf(out, &untracked->ident);24402441 strbuf_add(out, ouc, ouc_size(len));2442 free(ouc);2443 ouc = NULL;24442445 if (!untracked->root) {2446 varint_len = encode_varint(0, varbuf);2447 strbuf_add(out, varbuf, varint_len);2448 return;2449 }24502451 wd.index = 0;2452 wd.check_only = ewah_new();2453 wd.valid = ewah_new();2454 wd.sha1_valid = ewah_new();2455 strbuf_init(&wd.out, 1024);2456 strbuf_init(&wd.sb_stat, 1024);2457 strbuf_init(&wd.sb_sha1, 1024);2458 write_one_dir(untracked->root, &wd);24592460 varint_len = encode_varint(wd.index, varbuf);2461 strbuf_add(out, varbuf, varint_len);2462 strbuf_addbuf(out, &wd.out);2463 ewah_serialize_strbuf(wd.valid, out);2464 ewah_serialize_strbuf(wd.check_only, out);2465 ewah_serialize_strbuf(wd.sha1_valid, out);2466 strbuf_addbuf(out, &wd.sb_stat);2467 strbuf_addbuf(out, &wd.sb_sha1);2468 strbuf_addch(out, '\0'); /* safe guard for string lists */24692470 ewah_free(wd.valid);2471 ewah_free(wd.check_only);2472 ewah_free(wd.sha1_valid);2473 strbuf_release(&wd.out);2474 strbuf_release(&wd.sb_stat);2475 strbuf_release(&wd.sb_sha1);2476}24772478static void free_untracked(struct untracked_cache_dir *ucd)2479{2480 int i;2481 if (!ucd)2482 return;2483 for (i = 0; i < ucd->dirs_nr; i++)2484 free_untracked(ucd->dirs[i]);2485 for (i = 0; i < ucd->untracked_nr; i++)2486 free(ucd->untracked[i]);2487 free(ucd->untracked);2488 free(ucd->dirs);2489 free(ucd);2490}24912492void free_untracked_cache(struct untracked_cache *uc)2493{2494 if (uc)2495 free_untracked(uc->root);2496 free(uc);2497}24982499struct read_data {2500 int index;2501 struct untracked_cache_dir **ucd;2502 struct ewah_bitmap *check_only;2503 struct ewah_bitmap *valid;2504 struct ewah_bitmap *sha1_valid;2505 const unsigned char *data;2506 const unsigned char *end;2507};25082509static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)2510{2511 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);2512 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);2513 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);2514 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);2515 to->sd_dev = get_be32(&from->sd_dev);2516 to->sd_ino = get_be32(&from->sd_ino);2517 to->sd_uid = get_be32(&from->sd_uid);2518 to->sd_gid = get_be32(&from->sd_gid);2519 to->sd_size = get_be32(&from->sd_size);2520}25212522static int read_one_dir(struct untracked_cache_dir **untracked_,2523 struct read_data *rd)2524{2525 struct untracked_cache_dir ud, *untracked;2526 const unsigned char *next, *data = rd->data, *end = rd->end;2527 unsigned int value;2528 int i, len;25292530 memset(&ud, 0, sizeof(ud));25312532 next = data;2533 value = decode_varint(&next);2534 if (next > end)2535 return -1;2536 ud.recurse = 1;2537 ud.untracked_alloc = value;2538 ud.untracked_nr = value;2539 if (ud.untracked_nr)2540 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);2541 data = next;25422543 next = data;2544 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);2545 if (next > end)2546 return -1;2547 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);2548 data = next;25492550 len = strlen((const char *)data);2551 next = data + len + 1;2552 if (next > rd->end)2553 return -1;2554 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));2555 memcpy(untracked, &ud, sizeof(ud));2556 memcpy(untracked->name, data, len + 1);2557 data = next;25582559 for (i = 0; i < untracked->untracked_nr; i++) {2560 len = strlen((const char *)data);2561 next = data + len + 1;2562 if (next > rd->end)2563 return -1;2564 untracked->untracked[i] = xstrdup((const char*)data);2565 data = next;2566 }25672568 rd->ucd[rd->index++] = untracked;2569 rd->data = data;25702571 for (i = 0; i < untracked->dirs_nr; i++) {2572 len = read_one_dir(untracked->dirs + i, rd);2573 if (len < 0)2574 return -1;2575 }2576 return 0;2577}25782579static void set_check_only(size_t pos, void *cb)2580{2581 struct read_data *rd = cb;2582 struct untracked_cache_dir *ud = rd->ucd[pos];2583 ud->check_only = 1;2584}25852586static void read_stat(size_t pos, void *cb)2587{2588 struct read_data *rd = cb;2589 struct untracked_cache_dir *ud = rd->ucd[pos];2590 if (rd->data + sizeof(struct stat_data) > rd->end) {2591 rd->data = rd->end + 1;2592 return;2593 }2594 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);2595 rd->data += sizeof(struct stat_data);2596 ud->valid = 1;2597}25982599static void read_sha1(size_t pos, void *cb)2600{2601 struct read_data *rd = cb;2602 struct untracked_cache_dir *ud = rd->ucd[pos];2603 if (rd->data + 20 > rd->end) {2604 rd->data = rd->end + 1;2605 return;2606 }2607 hashcpy(ud->exclude_sha1, rd->data);2608 rd->data += 20;2609}26102611static void load_sha1_stat(struct sha1_stat *sha1_stat,2612 const struct stat_data *stat,2613 const unsigned char *sha1)2614{2615 stat_data_from_disk(&sha1_stat->stat, stat);2616 hashcpy(sha1_stat->sha1, sha1);2617 sha1_stat->valid = 1;2618}26192620struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)2621{2622 const struct ondisk_untracked_cache *ouc;2623 struct untracked_cache *uc;2624 struct read_data rd;2625 const unsigned char *next = data, *end = (const unsigned char *)data + sz;2626 const char *ident;2627 int ident_len, len;26282629 if (sz <= 1 || end[-1] != '\0')2630 return NULL;2631 end--;26322633 ident_len = decode_varint(&next);2634 if (next + ident_len > end)2635 return NULL;2636 ident = (const char *)next;2637 next += ident_len;26382639 ouc = (const struct ondisk_untracked_cache *)next;2640 if (next + ouc_size(0) > end)2641 return NULL;26422643 uc = xcalloc(1, sizeof(*uc));2644 strbuf_init(&uc->ident, ident_len);2645 strbuf_add(&uc->ident, ident, ident_len);2646 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,2647 ouc->info_exclude_sha1);2648 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,2649 ouc->excludes_file_sha1);2650 uc->dir_flags = get_be32(&ouc->dir_flags);2651 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);2652 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */2653 next += ouc_size(strlen(ouc->exclude_per_dir));2654 if (next >= end)2655 goto done2;26562657 len = decode_varint(&next);2658 if (next > end || len == 0)2659 goto done2;26602661 rd.valid = ewah_new();2662 rd.check_only = ewah_new();2663 rd.sha1_valid = ewah_new();2664 rd.data = next;2665 rd.end = end;2666 rd.index = 0;2667 ALLOC_ARRAY(rd.ucd, len);26682669 if (read_one_dir(&uc->root, &rd) || rd.index != len)2670 goto done;26712672 next = rd.data;2673 len = ewah_read_mmap(rd.valid, next, end - next);2674 if (len < 0)2675 goto done;26762677 next += len;2678 len = ewah_read_mmap(rd.check_only, next, end - next);2679 if (len < 0)2680 goto done;26812682 next += len;2683 len = ewah_read_mmap(rd.sha1_valid, next, end - next);2684 if (len < 0)2685 goto done;26862687 ewah_each_bit(rd.check_only, set_check_only, &rd);2688 rd.data = next + len;2689 ewah_each_bit(rd.valid, read_stat, &rd);2690 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);2691 next = rd.data;26922693done:2694 free(rd.ucd);2695 ewah_free(rd.valid);2696 ewah_free(rd.check_only);2697 ewah_free(rd.sha1_valid);2698done2:2699 if (next != end) {2700 free_untracked_cache(uc);2701 uc = NULL;2702 }2703 return uc;2704}27052706static void invalidate_one_directory(struct untracked_cache *uc,2707 struct untracked_cache_dir *ucd)2708{2709 uc->dir_invalidated++;2710 ucd->valid = 0;2711 ucd->untracked_nr = 0;2712}27132714/*2715 * Normally when an entry is added or removed from a directory,2716 * invalidating that directory is enough. No need to touch its2717 * ancestors. When a directory is shown as "foo/bar/" in git-status2718 * however, deleting or adding an entry may have cascading effect.2719 *2720 * Say the "foo/bar/file" has become untracked, we need to tell the2721 * untracked_cache_dir of "foo" that "bar/" is not an untracked2722 * directory any more (because "bar" is managed by foo as an untracked2723 * "file").2724 *2725 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2726 * was the last untracked entry in the entire "foo", we should show2727 * "foo/" instead. Which means we have to invalidate past "bar" up to2728 * "foo".2729 *2730 * This function traverses all directories from root to leaf. If there2731 * is a chance of one of the above cases happening, we invalidate back2732 * to root. Otherwise we just invalidate the leaf. There may be a more2733 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2734 * detect these cases and avoid unnecessary invalidation, for example,2735 * checking for the untracked entry named "bar/" in "foo", but for now2736 * stick to something safe and simple.2737 */2738static int invalidate_one_component(struct untracked_cache *uc,2739 struct untracked_cache_dir *dir,2740 const char *path, int len)2741{2742 const char *rest = strchr(path, '/');27432744 if (rest) {2745 int component_len = rest - path;2746 struct untracked_cache_dir *d =2747 lookup_untracked(uc, dir, path, component_len);2748 int ret =2749 invalidate_one_component(uc, d, rest + 1,2750 len - (component_len + 1));2751 if (ret)2752 invalidate_one_directory(uc, dir);2753 return ret;2754 }27552756 invalidate_one_directory(uc, dir);2757 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2758}27592760void untracked_cache_invalidate_path(struct index_state *istate,2761 const char *path)2762{2763 if (!istate->untracked || !istate->untracked->root)2764 return;2765 invalidate_one_component(istate->untracked, istate->untracked->root,2766 path, strlen(path));2767}27682769void untracked_cache_remove_from_index(struct index_state *istate,2770 const char *path)2771{2772 untracked_cache_invalidate_path(istate, path);2773}27742775void untracked_cache_add_to_index(struct index_state *istate,2776 const char *path)2777{2778 untracked_cache_invalidate_path(istate, path);2779}27802781/* Update gitfile and core.worktree setting to connect work tree and git dir */2782void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)2783{2784 struct strbuf gitfile_sb = STRBUF_INIT;2785 struct strbuf cfg_sb = STRBUF_INIT;2786 struct strbuf rel_path = STRBUF_INIT;2787 char *git_dir, *work_tree;27882789 /* Prepare .git file */2790 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);2791 if (safe_create_leading_directories_const(gitfile_sb.buf))2792 die(_("could not create directories for %s"), gitfile_sb.buf);27932794 /* Prepare config file */2795 strbuf_addf(&cfg_sb, "%s/config", git_dir_);2796 if (safe_create_leading_directories_const(cfg_sb.buf))2797 die(_("could not create directories for %s"), cfg_sb.buf);27982799 git_dir = real_pathdup(git_dir_, 1);2800 work_tree = real_pathdup(work_tree_, 1);28012802 /* Write .git file */2803 write_file(gitfile_sb.buf, "gitdir: %s",2804 relative_path(git_dir, work_tree, &rel_path));2805 /* Update core.worktree setting */2806 git_config_set_in_file(cfg_sb.buf, "core.worktree",2807 relative_path(work_tree, git_dir, &rel_path));28082809 strbuf_release(&gitfile_sb);2810 strbuf_release(&cfg_sb);2811 strbuf_release(&rel_path);2812 free(work_tree);2813 free(git_dir);2814}28152816/*2817 * Migrate the git directory of the given path from old_git_dir to new_git_dir.2818 */2819void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)2820{2821 if (rename(old_git_dir, new_git_dir) < 0)2822 die_errno(_("could not migrate git directory from '%s' to '%s'"),2823 old_git_dir, new_git_dir);28242825 connect_work_tree_and_git_dir(path, new_git_dir);2826}