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#include "cache.h" 11#include "dir.h" 12#include "attr.h" 13#include "refs.h" 14#include "wildmatch.h" 15#include "pathspec.h" 16#include "utf8.h" 17#include "varint.h" 18#include "ewah/ewok.h" 19 20/* 21 * Tells read_directory_recursive how a file or directory should be treated. 22 * Values are ordered by significance, e.g. if a directory contains both 23 * excluded and untracked files, it is listed as untracked because 24 * path_untracked > path_excluded. 25 */ 26enum path_treatment { 27 path_none = 0, 28 path_recurse, 29 path_excluded, 30 path_untracked 31}; 32 33/* 34 * Support data structure for our opendir/readdir/closedir wrappers 35 */ 36struct cached_dir { 37 DIR *fdir; 38 struct untracked_cache_dir *untracked; 39 int nr_files; 40 int nr_dirs; 41 42 struct dirent *de; 43 const char *file; 44 struct untracked_cache_dir *ucd; 45}; 46 47static enum path_treatment read_directory_recursive(struct dir_struct *dir, 48 const char *path, int len, struct untracked_cache_dir *untracked, 49 int check_only, const struct pathspec *pathspec); 50static int get_dtype(struct dirent *de, const char *path, int len); 51 52int fspathcmp(const char *a, const char *b) 53{ 54 return ignore_case ? strcasecmp(a, b) : strcmp(a, b); 55} 56 57int fspathncmp(const char *a, const char *b, size_t count) 58{ 59 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); 60} 61 62int git_fnmatch(const struct pathspec_item *item, 63 const char *pattern, const char *string, 64 int prefix) 65{ 66 if (prefix > 0) { 67 if (ps_strncmp(item, pattern, string, prefix)) 68 return WM_NOMATCH; 69 pattern += prefix; 70 string += prefix; 71 } 72 if (item->flags & PATHSPEC_ONESTAR) { 73 int pattern_len = strlen(++pattern); 74 int string_len = strlen(string); 75 return string_len < pattern_len || 76 ps_strcmp(item, pattern, 77 string + string_len - pattern_len); 78 } 79 if (item->magic & PATHSPEC_GLOB) 80 return wildmatch(pattern, string, 81 WM_PATHNAME | 82 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0), 83 NULL); 84 else 85 /* wildmatch has not learned no FNM_PATHNAME mode yet */ 86 return wildmatch(pattern, string, 87 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0, 88 NULL); 89} 90 91static int fnmatch_icase_mem(const char *pattern, int patternlen, 92 const char *string, int stringlen, 93 int flags) 94{ 95 int match_status; 96 struct strbuf pat_buf = STRBUF_INIT; 97 struct strbuf str_buf = STRBUF_INIT; 98 const char *use_pat = pattern; 99 const char *use_str = string; 100 101 if (pattern[patternlen]) { 102 strbuf_add(&pat_buf, pattern, patternlen); 103 use_pat = pat_buf.buf; 104 } 105 if (string[stringlen]) { 106 strbuf_add(&str_buf, string, stringlen); 107 use_str = str_buf.buf; 108 } 109 110 if (ignore_case) 111 flags |= WM_CASEFOLD; 112 match_status = wildmatch(use_pat, use_str, flags, NULL); 113 114 strbuf_release(&pat_buf); 115 strbuf_release(&str_buf); 116 117 return match_status; 118} 119 120static size_t common_prefix_len(const struct pathspec *pathspec) 121{ 122 int n; 123 size_t max = 0; 124 125 /* 126 * ":(icase)path" is treated as a pathspec full of 127 * wildcard. In other words, only prefix is considered common 128 * prefix. If the pathspec is abc/foo abc/bar, running in 129 * subdir xyz, the common prefix is still xyz, not xuz/abc as 130 * in non-:(icase). 131 */ 132 GUARD_PATHSPEC(pathspec, 133 PATHSPEC_FROMTOP | 134 PATHSPEC_MAXDEPTH | 135 PATHSPEC_LITERAL | 136 PATHSPEC_GLOB | 137 PATHSPEC_ICASE | 138 PATHSPEC_EXCLUDE | 139 PATHSPEC_ATTR); 140 141 for (n = 0; n < pathspec->nr; n++) { 142 size_t i = 0, len = 0, item_len; 143 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE) 144 continue; 145 if (pathspec->items[n].magic & PATHSPEC_ICASE) 146 item_len = pathspec->items[n].prefix; 147 else 148 item_len = pathspec->items[n].nowildcard_len; 149 while (i < item_len && (n == 0 || i < max)) { 150 char c = pathspec->items[n].match[i]; 151 if (c != pathspec->items[0].match[i]) 152 break; 153 if (c == '/') 154 len = i + 1; 155 i++; 156 } 157 if (n == 0 || len < max) { 158 max = len; 159 if (!max) 160 break; 161 } 162 } 163 return max; 164} 165 166/* 167 * Returns a copy of the longest leading path common among all 168 * pathspecs. 169 */ 170char *common_prefix(const struct pathspec *pathspec) 171{ 172 unsigned long len = common_prefix_len(pathspec); 173 174 return len ? xmemdupz(pathspec->items[0].match, len) : NULL; 175} 176 177int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec) 178{ 179 const char *prefix; 180 size_t prefix_len; 181 182 /* 183 * Calculate common prefix for the pathspec, and 184 * use that to optimize the directory walk 185 */ 186 prefix_len = common_prefix_len(pathspec); 187 prefix = prefix_len ? pathspec->items[0].match : ""; 188 189 /* Read the directory and prune it */ 190 read_directory(dir, prefix, prefix_len, pathspec); 191 192 return prefix_len; 193} 194 195int within_depth(const char *name, int namelen, 196 int depth, int max_depth) 197{ 198 const char *cp = name, *cpe = name + namelen; 199 200 while (cp < cpe) { 201 if (*cp++ != '/') 202 continue; 203 depth++; 204 if (depth > max_depth) 205 return 0; 206 } 207 return 1; 208} 209 210#define DO_MATCH_EXCLUDE (1<<0) 211#define DO_MATCH_DIRECTORY (1<<1) 212#define DO_MATCH_SUBMODULE (1<<2) 213 214static int match_attrs(const char *name, int namelen, 215 const struct pathspec_item *item) 216{ 217 int i; 218 219 git_check_attr(name, item->attr_check); 220 for (i = 0; i < item->attr_match_nr; i++) { 221 const char *value; 222 int matched; 223 enum attr_match_mode match_mode; 224 225 value = item->attr_check->items[i].value; 226 match_mode = item->attr_match[i].match_mode; 227 228 if (ATTR_TRUE(value)) 229 matched = (match_mode == MATCH_SET); 230 else if (ATTR_FALSE(value)) 231 matched = (match_mode == MATCH_UNSET); 232 else if (ATTR_UNSET(value)) 233 matched = (match_mode == MATCH_UNSPECIFIED); 234 else 235 matched = (match_mode == MATCH_VALUE && 236 !strcmp(item->attr_match[i].value, value)); 237 if (!matched) 238 return 0; 239 } 240 241 return 1; 242} 243 244/* 245 * Does 'match' match the given name? 246 * A match is found if 247 * 248 * (1) the 'match' string is leading directory of 'name', or 249 * (2) the 'match' string is a wildcard and matches 'name', or 250 * (3) the 'match' string is exactly the same as 'name'. 251 * 252 * and the return value tells which case it was. 253 * 254 * It returns 0 when there is no match. 255 */ 256static int match_pathspec_item(const struct pathspec_item *item, int prefix, 257 const char *name, int namelen, unsigned flags) 258{ 259 /* name/namelen has prefix cut off by caller */ 260 const char *match = item->match + prefix; 261 int matchlen = item->len - prefix; 262 263 /* 264 * The normal call pattern is: 265 * 1. prefix = common_prefix_len(ps); 266 * 2. prune something, or fill_directory 267 * 3. match_pathspec() 268 * 269 * 'prefix' at #1 may be shorter than the command's prefix and 270 * it's ok for #2 to match extra files. Those extras will be 271 * trimmed at #3. 272 * 273 * Suppose the pathspec is 'foo' and '../bar' running from 274 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 275 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 276 * user does not want XYZ/foo, only the "foo" part should be 277 * case-insensitive. We need to filter out XYZ/foo here. In 278 * other words, we do not trust the caller on comparing the 279 * prefix part when :(icase) is involved. We do exact 280 * comparison ourselves. 281 * 282 * Normally the caller (common_prefix_len() in fact) does 283 * _exact_ matching on name[-prefix+1..-1] and we do not need 284 * to check that part. Be defensive and check it anyway, in 285 * case common_prefix_len is changed, or a new caller is 286 * introduced that does not use common_prefix_len. 287 * 288 * If the penalty turns out too high when prefix is really 289 * long, maybe change it to 290 * strncmp(match, name, item->prefix - prefix) 291 */ 292 if (item->prefix && (item->magic & PATHSPEC_ICASE) && 293 strncmp(item->match, name - prefix, item->prefix)) 294 return 0; 295 296 if (item->attr_match_nr && !match_attrs(name, namelen, item)) 297 return 0; 298 299 /* If the match was just the prefix, we matched */ 300 if (!*match) 301 return MATCHED_RECURSIVELY; 302 303 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 304 if (matchlen == namelen) 305 return MATCHED_EXACTLY; 306 307 if (match[matchlen-1] == '/' || name[matchlen] == '/') 308 return MATCHED_RECURSIVELY; 309 } else if ((flags & DO_MATCH_DIRECTORY) && 310 match[matchlen - 1] == '/' && 311 namelen == matchlen - 1 && 312 !ps_strncmp(item, match, name, namelen)) 313 return MATCHED_EXACTLY; 314 315 if (item->nowildcard_len < item->len && 316 !git_fnmatch(item, match, name, 317 item->nowildcard_len - prefix)) 318 return MATCHED_FNMATCH; 319 320 /* Perform checks to see if "name" is a super set of the pathspec */ 321 if (flags & DO_MATCH_SUBMODULE) { 322 /* name is a literal prefix of the pathspec */ 323 if ((namelen < matchlen) && 324 (match[namelen] == '/') && 325 !ps_strncmp(item, match, name, namelen)) 326 return MATCHED_RECURSIVELY; 327 328 /* name" doesn't match up to the first wild character */ 329 if (item->nowildcard_len < item->len && 330 ps_strncmp(item, match, name, 331 item->nowildcard_len - prefix)) 332 return 0; 333 334 /* 335 * Here is where we would perform a wildmatch to check if 336 * "name" can be matched as a directory (or a prefix) against 337 * the pathspec. Since wildmatch doesn't have this capability 338 * at the present we have to punt and say that it is a match, 339 * potentially returning a false positive 340 * The submodules themselves will be able to perform more 341 * accurate matching to determine if the pathspec matches. 342 */ 343 return MATCHED_RECURSIVELY; 344 } 345 346 return 0; 347} 348 349/* 350 * Given a name and a list of pathspecs, returns the nature of the 351 * closest (i.e. most specific) match of the name to any of the 352 * pathspecs. 353 * 354 * The caller typically calls this multiple times with the same 355 * pathspec and seen[] array but with different name/namelen 356 * (e.g. entries from the index) and is interested in seeing if and 357 * how each pathspec matches all the names it calls this function 358 * with. A mark is left in the seen[] array for each pathspec element 359 * indicating the closest type of match that element achieved, so if 360 * seen[n] remains zero after multiple invocations, that means the nth 361 * pathspec did not match any names, which could indicate that the 362 * user mistyped the nth pathspec. 363 */ 364static int do_match_pathspec(const struct pathspec *ps, 365 const char *name, int namelen, 366 int prefix, char *seen, 367 unsigned flags) 368{ 369 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE; 370 371 GUARD_PATHSPEC(ps, 372 PATHSPEC_FROMTOP | 373 PATHSPEC_MAXDEPTH | 374 PATHSPEC_LITERAL | 375 PATHSPEC_GLOB | 376 PATHSPEC_ICASE | 377 PATHSPEC_EXCLUDE | 378 PATHSPEC_ATTR); 379 380 if (!ps->nr) { 381 if (!ps->recursive || 382 !(ps->magic & PATHSPEC_MAXDEPTH) || 383 ps->max_depth == -1) 384 return MATCHED_RECURSIVELY; 385 386 if (within_depth(name, namelen, 0, ps->max_depth)) 387 return MATCHED_EXACTLY; 388 else 389 return 0; 390 } 391 392 name += prefix; 393 namelen -= prefix; 394 395 for (i = ps->nr - 1; i >= 0; i--) { 396 int how; 397 398 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 399 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 400 continue; 401 402 if (seen && seen[i] == MATCHED_EXACTLY) 403 continue; 404 /* 405 * Make exclude patterns optional and never report 406 * "pathspec ':(exclude)foo' matches no files" 407 */ 408 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 409 seen[i] = MATCHED_FNMATCH; 410 how = match_pathspec_item(ps->items+i, prefix, name, 411 namelen, flags); 412 if (ps->recursive && 413 (ps->magic & PATHSPEC_MAXDEPTH) && 414 ps->max_depth != -1 && 415 how && how != MATCHED_FNMATCH) { 416 int len = ps->items[i].len; 417 if (name[len] == '/') 418 len++; 419 if (within_depth(name+len, namelen-len, 0, ps->max_depth)) 420 how = MATCHED_EXACTLY; 421 else 422 how = 0; 423 } 424 if (how) { 425 if (retval < how) 426 retval = how; 427 if (seen && seen[i] < how) 428 seen[i] = how; 429 } 430 } 431 return retval; 432} 433 434int match_pathspec(const struct pathspec *ps, 435 const char *name, int namelen, 436 int prefix, char *seen, int is_dir) 437{ 438 int positive, negative; 439 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0; 440 positive = do_match_pathspec(ps, name, namelen, 441 prefix, seen, flags); 442 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 443 return positive; 444 negative = do_match_pathspec(ps, name, namelen, 445 prefix, seen, 446 flags | DO_MATCH_EXCLUDE); 447 return negative ? 0 : positive; 448} 449 450/** 451 * Check if a submodule is a superset of the pathspec 452 */ 453int submodule_path_match(const struct pathspec *ps, 454 const char *submodule_name, 455 char *seen) 456{ 457 int matched = do_match_pathspec(ps, submodule_name, 458 strlen(submodule_name), 459 0, seen, 460 DO_MATCH_DIRECTORY | 461 DO_MATCH_SUBMODULE); 462 return matched; 463} 464 465int report_path_error(const char *ps_matched, 466 const struct pathspec *pathspec, 467 const char *prefix) 468{ 469 /* 470 * Make sure all pathspec matched; otherwise it is an error. 471 */ 472 int num, errors = 0; 473 for (num = 0; num < pathspec->nr; num++) { 474 int other, found_dup; 475 476 if (ps_matched[num]) 477 continue; 478 /* 479 * The caller might have fed identical pathspec 480 * twice. Do not barf on such a mistake. 481 * FIXME: parse_pathspec should have eliminated 482 * duplicate pathspec. 483 */ 484 for (found_dup = other = 0; 485 !found_dup && other < pathspec->nr; 486 other++) { 487 if (other == num || !ps_matched[other]) 488 continue; 489 if (!strcmp(pathspec->items[other].original, 490 pathspec->items[num].original)) 491 /* 492 * Ok, we have a match already. 493 */ 494 found_dup = 1; 495 } 496 if (found_dup) 497 continue; 498 499 error("pathspec '%s' did not match any file(s) known to git.", 500 pathspec->items[num].original); 501 errors++; 502 } 503 return errors; 504} 505 506/* 507 * Return the length of the "simple" part of a path match limiter. 508 */ 509int simple_length(const char *match) 510{ 511 int len = -1; 512 513 for (;;) { 514 unsigned char c = *match++; 515 len++; 516 if (c == '\0' || is_glob_special(c)) 517 return len; 518 } 519} 520 521int no_wildcard(const char *string) 522{ 523 return string[simple_length(string)] == '\0'; 524} 525 526void parse_exclude_pattern(const char **pattern, 527 int *patternlen, 528 unsigned *flags, 529 int *nowildcardlen) 530{ 531 const char *p = *pattern; 532 size_t i, len; 533 534 *flags = 0; 535 if (*p == '!') { 536 *flags |= EXC_FLAG_NEGATIVE; 537 p++; 538 } 539 len = strlen(p); 540 if (len && p[len - 1] == '/') { 541 len--; 542 *flags |= EXC_FLAG_MUSTBEDIR; 543 } 544 for (i = 0; i < len; i++) { 545 if (p[i] == '/') 546 break; 547 } 548 if (i == len) 549 *flags |= EXC_FLAG_NODIR; 550 *nowildcardlen = simple_length(p); 551 /* 552 * we should have excluded the trailing slash from 'p' too, 553 * but that's one more allocation. Instead just make sure 554 * nowildcardlen does not exceed real patternlen 555 */ 556 if (*nowildcardlen > len) 557 *nowildcardlen = len; 558 if (*p == '*' && no_wildcard(p + 1)) 559 *flags |= EXC_FLAG_ENDSWITH; 560 *pattern = p; 561 *patternlen = len; 562} 563 564void add_exclude(const char *string, const char *base, 565 int baselen, struct exclude_list *el, int srcpos) 566{ 567 struct exclude *x; 568 int patternlen; 569 unsigned flags; 570 int nowildcardlen; 571 572 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 573 if (flags & EXC_FLAG_MUSTBEDIR) { 574 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen); 575 } else { 576 x = xmalloc(sizeof(*x)); 577 x->pattern = string; 578 } 579 x->patternlen = patternlen; 580 x->nowildcardlen = nowildcardlen; 581 x->base = base; 582 x->baselen = baselen; 583 x->flags = flags; 584 x->srcpos = srcpos; 585 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc); 586 el->excludes[el->nr++] = x; 587 x->el = el; 588} 589 590static void *read_skip_worktree_file_from_index(const char *path, size_t *size, 591 struct sha1_stat *sha1_stat) 592{ 593 int pos, len; 594 unsigned long sz; 595 enum object_type type; 596 void *data; 597 598 len = strlen(path); 599 pos = cache_name_pos(path, len); 600 if (pos < 0) 601 return NULL; 602 if (!ce_skip_worktree(active_cache[pos])) 603 return NULL; 604 data = read_sha1_file(active_cache[pos]->oid.hash, &type, &sz); 605 if (!data || type != OBJ_BLOB) { 606 free(data); 607 return NULL; 608 } 609 *size = xsize_t(sz); 610 if (sha1_stat) { 611 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat)); 612 hashcpy(sha1_stat->sha1, active_cache[pos]->oid.hash); 613 } 614 return data; 615} 616 617/* 618 * Frees memory within el which was allocated for exclude patterns and 619 * the file buffer. Does not free el itself. 620 */ 621void clear_exclude_list(struct exclude_list *el) 622{ 623 int i; 624 625 for (i = 0; i < el->nr; i++) 626 free(el->excludes[i]); 627 free(el->excludes); 628 free(el->filebuf); 629 630 memset(el, 0, sizeof(*el)); 631} 632 633static void trim_trailing_spaces(char *buf) 634{ 635 char *p, *last_space = NULL; 636 637 for (p = buf; *p; p++) 638 switch (*p) { 639 case ' ': 640 if (!last_space) 641 last_space = p; 642 break; 643 case '\\': 644 p++; 645 if (!*p) 646 return; 647 /* fallthrough */ 648 default: 649 last_space = NULL; 650 } 651 652 if (last_space) 653 *last_space = '\0'; 654} 655 656/* 657 * Given a subdirectory name and "dir" of the current directory, 658 * search the subdir in "dir" and return it, or create a new one if it 659 * does not exist in "dir". 660 * 661 * If "name" has the trailing slash, it'll be excluded in the search. 662 */ 663static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 664 struct untracked_cache_dir *dir, 665 const char *name, int len) 666{ 667 int first, last; 668 struct untracked_cache_dir *d; 669 if (!dir) 670 return NULL; 671 if (len && name[len - 1] == '/') 672 len--; 673 first = 0; 674 last = dir->dirs_nr; 675 while (last > first) { 676 int cmp, next = (last + first) >> 1; 677 d = dir->dirs[next]; 678 cmp = strncmp(name, d->name, len); 679 if (!cmp && strlen(d->name) > len) 680 cmp = -1; 681 if (!cmp) 682 return d; 683 if (cmp < 0) { 684 last = next; 685 continue; 686 } 687 first = next+1; 688 } 689 690 uc->dir_created++; 691 FLEX_ALLOC_MEM(d, name, name, len); 692 693 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc); 694 memmove(dir->dirs + first + 1, dir->dirs + first, 695 (dir->dirs_nr - first) * sizeof(*dir->dirs)); 696 dir->dirs_nr++; 697 dir->dirs[first] = d; 698 return d; 699} 700 701static void do_invalidate_gitignore(struct untracked_cache_dir *dir) 702{ 703 int i; 704 dir->valid = 0; 705 dir->untracked_nr = 0; 706 for (i = 0; i < dir->dirs_nr; i++) 707 do_invalidate_gitignore(dir->dirs[i]); 708} 709 710static void invalidate_gitignore(struct untracked_cache *uc, 711 struct untracked_cache_dir *dir) 712{ 713 uc->gitignore_invalidated++; 714 do_invalidate_gitignore(dir); 715} 716 717static void invalidate_directory(struct untracked_cache *uc, 718 struct untracked_cache_dir *dir) 719{ 720 int i; 721 uc->dir_invalidated++; 722 dir->valid = 0; 723 dir->untracked_nr = 0; 724 for (i = 0; i < dir->dirs_nr; i++) 725 dir->dirs[i]->recurse = 0; 726} 727 728/* 729 * Given a file with name "fname", read it (either from disk, or from 730 * the index if "check_index" is non-zero), parse it and store the 731 * exclude rules in "el". 732 * 733 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 734 * stat data from disk (only valid if add_excludes returns zero). If 735 * ss_valid is non-zero, "ss" must contain good value as input. 736 */ 737static int add_excludes(const char *fname, const char *base, int baselen, 738 struct exclude_list *el, int check_index, 739 struct sha1_stat *sha1_stat) 740{ 741 struct stat st; 742 int fd, i, lineno = 1; 743 size_t size = 0; 744 char *buf, *entry; 745 746 fd = open(fname, O_RDONLY); 747 if (fd < 0 || fstat(fd, &st) < 0) { 748 if (errno != ENOENT) 749 warn_on_inaccessible(fname); 750 if (0 <= fd) 751 close(fd); 752 if (!check_index || 753 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL) 754 return -1; 755 if (size == 0) { 756 free(buf); 757 return 0; 758 } 759 if (buf[size-1] != '\n') { 760 buf = xrealloc(buf, st_add(size, 1)); 761 buf[size++] = '\n'; 762 } 763 } else { 764 size = xsize_t(st.st_size); 765 if (size == 0) { 766 if (sha1_stat) { 767 fill_stat_data(&sha1_stat->stat, &st); 768 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); 769 sha1_stat->valid = 1; 770 } 771 close(fd); 772 return 0; 773 } 774 buf = xmallocz(size); 775 if (read_in_full(fd, buf, size) != size) { 776 free(buf); 777 close(fd); 778 return -1; 779 } 780 buf[size++] = '\n'; 781 close(fd); 782 if (sha1_stat) { 783 int pos; 784 if (sha1_stat->valid && 785 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st)) 786 ; /* no content change, ss->sha1 still good */ 787 else if (check_index && 788 (pos = cache_name_pos(fname, strlen(fname))) >= 0 && 789 !ce_stage(active_cache[pos]) && 790 ce_uptodate(active_cache[pos]) && 791 !would_convert_to_git(fname)) 792 hashcpy(sha1_stat->sha1, 793 active_cache[pos]->oid.hash); 794 else 795 hash_sha1_file(buf, size, "blob", sha1_stat->sha1); 796 fill_stat_data(&sha1_stat->stat, &st); 797 sha1_stat->valid = 1; 798 } 799 } 800 801 el->filebuf = buf; 802 803 if (skip_utf8_bom(&buf, size)) 804 size -= buf - el->filebuf; 805 806 entry = buf; 807 808 for (i = 0; i < size; i++) { 809 if (buf[i] == '\n') { 810 if (entry != buf + i && entry[0] != '#') { 811 buf[i - (i && buf[i-1] == '\r')] = 0; 812 trim_trailing_spaces(entry); 813 add_exclude(entry, base, baselen, el, lineno); 814 } 815 lineno++; 816 entry = buf + i + 1; 817 } 818 } 819 return 0; 820} 821 822int add_excludes_from_file_to_list(const char *fname, const char *base, 823 int baselen, struct exclude_list *el, 824 int check_index) 825{ 826 return add_excludes(fname, base, baselen, el, check_index, NULL); 827} 828 829struct exclude_list *add_exclude_list(struct dir_struct *dir, 830 int group_type, const char *src) 831{ 832 struct exclude_list *el; 833 struct exclude_list_group *group; 834 835 group = &dir->exclude_list_group[group_type]; 836 ALLOC_GROW(group->el, group->nr + 1, group->alloc); 837 el = &group->el[group->nr++]; 838 memset(el, 0, sizeof(*el)); 839 el->src = src; 840 return el; 841} 842 843/* 844 * Used to set up core.excludesfile and .git/info/exclude lists. 845 */ 846static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname, 847 struct sha1_stat *sha1_stat) 848{ 849 struct exclude_list *el; 850 /* 851 * catch setup_standard_excludes() that's called before 852 * dir->untracked is assigned. That function behaves 853 * differently when dir->untracked is non-NULL. 854 */ 855 if (!dir->untracked) 856 dir->unmanaged_exclude_files++; 857 el = add_exclude_list(dir, EXC_FILE, fname); 858 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0) 859 die("cannot use %s as an exclude file", fname); 860} 861 862void add_excludes_from_file(struct dir_struct *dir, const char *fname) 863{ 864 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ 865 add_excludes_from_file_1(dir, fname, NULL); 866} 867 868int match_basename(const char *basename, int basenamelen, 869 const char *pattern, int prefix, int patternlen, 870 unsigned flags) 871{ 872 if (prefix == patternlen) { 873 if (patternlen == basenamelen && 874 !fspathncmp(pattern, basename, basenamelen)) 875 return 1; 876 } else if (flags & EXC_FLAG_ENDSWITH) { 877 /* "*literal" matching against "fooliteral" */ 878 if (patternlen - 1 <= basenamelen && 879 !fspathncmp(pattern + 1, 880 basename + basenamelen - (patternlen - 1), 881 patternlen - 1)) 882 return 1; 883 } else { 884 if (fnmatch_icase_mem(pattern, patternlen, 885 basename, basenamelen, 886 0) == 0) 887 return 1; 888 } 889 return 0; 890} 891 892int match_pathname(const char *pathname, int pathlen, 893 const char *base, int baselen, 894 const char *pattern, int prefix, int patternlen, 895 unsigned flags) 896{ 897 const char *name; 898 int namelen; 899 900 /* 901 * match with FNM_PATHNAME; the pattern has base implicitly 902 * in front of it. 903 */ 904 if (*pattern == '/') { 905 pattern++; 906 patternlen--; 907 prefix--; 908 } 909 910 /* 911 * baselen does not count the trailing slash. base[] may or 912 * may not end with a trailing slash though. 913 */ 914 if (pathlen < baselen + 1 || 915 (baselen && pathname[baselen] != '/') || 916 fspathncmp(pathname, base, baselen)) 917 return 0; 918 919 namelen = baselen ? pathlen - baselen - 1 : pathlen; 920 name = pathname + pathlen - namelen; 921 922 if (prefix) { 923 /* 924 * if the non-wildcard part is longer than the 925 * remaining pathname, surely it cannot match. 926 */ 927 if (prefix > namelen) 928 return 0; 929 930 if (fspathncmp(pattern, name, prefix)) 931 return 0; 932 pattern += prefix; 933 patternlen -= prefix; 934 name += prefix; 935 namelen -= prefix; 936 937 /* 938 * If the whole pattern did not have a wildcard, 939 * then our prefix match is all we need; we 940 * do not need to call fnmatch at all. 941 */ 942 if (!patternlen && !namelen) 943 return 1; 944 } 945 946 return fnmatch_icase_mem(pattern, patternlen, 947 name, namelen, 948 WM_PATHNAME) == 0; 949} 950 951/* 952 * Scan the given exclude list in reverse to see whether pathname 953 * should be ignored. The first match (i.e. the last on the list), if 954 * any, determines the fate. Returns the exclude_list element which 955 * matched, or NULL for undecided. 956 */ 957static struct exclude *last_exclude_matching_from_list(const char *pathname, 958 int pathlen, 959 const char *basename, 960 int *dtype, 961 struct exclude_list *el) 962{ 963 struct exclude *exc = NULL; /* undecided */ 964 int i; 965 966 if (!el->nr) 967 return NULL; /* undefined */ 968 969 for (i = el->nr - 1; 0 <= i; i--) { 970 struct exclude *x = el->excludes[i]; 971 const char *exclude = x->pattern; 972 int prefix = x->nowildcardlen; 973 974 if (x->flags & EXC_FLAG_MUSTBEDIR) { 975 if (*dtype == DT_UNKNOWN) 976 *dtype = get_dtype(NULL, pathname, pathlen); 977 if (*dtype != DT_DIR) 978 continue; 979 } 980 981 if (x->flags & EXC_FLAG_NODIR) { 982 if (match_basename(basename, 983 pathlen - (basename - pathname), 984 exclude, prefix, x->patternlen, 985 x->flags)) { 986 exc = x; 987 break; 988 } 989 continue; 990 } 991 992 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/'); 993 if (match_pathname(pathname, pathlen, 994 x->base, x->baselen ? x->baselen - 1 : 0, 995 exclude, prefix, x->patternlen, x->flags)) { 996 exc = x; 997 break; 998 } 999 }1000 return exc;1001}10021003/*1004 * Scan the list and let the last match determine the fate.1005 * Return 1 for exclude, 0 for include and -1 for undecided.1006 */1007int is_excluded_from_list(const char *pathname,1008 int pathlen, const char *basename, int *dtype,1009 struct exclude_list *el)1010{1011 struct exclude *exclude;1012 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);1013 if (exclude)1014 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1015 return -1; /* undecided */1016}10171018static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,1019 const char *pathname, int pathlen, const char *basename,1020 int *dtype_p)1021{1022 int i, j;1023 struct exclude_list_group *group;1024 struct exclude *exclude;1025 for (i = EXC_CMDL; i <= EXC_FILE; i++) {1026 group = &dir->exclude_list_group[i];1027 for (j = group->nr - 1; j >= 0; j--) {1028 exclude = last_exclude_matching_from_list(1029 pathname, pathlen, basename, dtype_p,1030 &group->el[j]);1031 if (exclude)1032 return exclude;1033 }1034 }1035 return NULL;1036}10371038/*1039 * Loads the per-directory exclude list for the substring of base1040 * which has a char length of baselen.1041 */1042static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)1043{1044 struct exclude_list_group *group;1045 struct exclude_list *el;1046 struct exclude_stack *stk = NULL;1047 struct untracked_cache_dir *untracked;1048 int current;10491050 group = &dir->exclude_list_group[EXC_DIRS];10511052 /*1053 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1054 * which originate from directories not in the prefix of the1055 * path being checked.1056 */1057 while ((stk = dir->exclude_stack) != NULL) {1058 if (stk->baselen <= baselen &&1059 !strncmp(dir->basebuf.buf, base, stk->baselen))1060 break;1061 el = &group->el[dir->exclude_stack->exclude_ix];1062 dir->exclude_stack = stk->prev;1063 dir->exclude = NULL;1064 free((char *)el->src); /* see strbuf_detach() below */1065 clear_exclude_list(el);1066 free(stk);1067 group->nr--;1068 }10691070 /* Skip traversing into sub directories if the parent is excluded */1071 if (dir->exclude)1072 return;10731074 /*1075 * Lazy initialization. All call sites currently just1076 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1077 * them seems lots of work for little benefit.1078 */1079 if (!dir->basebuf.buf)1080 strbuf_init(&dir->basebuf, PATH_MAX);10811082 /* Read from the parent directories and push them down. */1083 current = stk ? stk->baselen : -1;1084 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);1085 if (dir->untracked)1086 untracked = stk ? stk->ucd : dir->untracked->root;1087 else1088 untracked = NULL;10891090 while (current < baselen) {1091 const char *cp;1092 struct sha1_stat sha1_stat;10931094 stk = xcalloc(1, sizeof(*stk));1095 if (current < 0) {1096 cp = base;1097 current = 0;1098 } else {1099 cp = strchr(base + current + 1, '/');1100 if (!cp)1101 die("oops in prep_exclude");1102 cp++;1103 untracked =1104 lookup_untracked(dir->untracked, untracked,1105 base + current,1106 cp - base - current);1107 }1108 stk->prev = dir->exclude_stack;1109 stk->baselen = cp - base;1110 stk->exclude_ix = group->nr;1111 stk->ucd = untracked;1112 el = add_exclude_list(dir, EXC_DIRS, NULL);1113 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1114 assert(stk->baselen == dir->basebuf.len);11151116 /* Abort if the directory is excluded */1117 if (stk->baselen) {1118 int dt = DT_DIR;1119 dir->basebuf.buf[stk->baselen - 1] = 0;1120 dir->exclude = last_exclude_matching_from_lists(dir,1121 dir->basebuf.buf, stk->baselen - 1,1122 dir->basebuf.buf + current, &dt);1123 dir->basebuf.buf[stk->baselen - 1] = '/';1124 if (dir->exclude &&1125 dir->exclude->flags & EXC_FLAG_NEGATIVE)1126 dir->exclude = NULL;1127 if (dir->exclude) {1128 dir->exclude_stack = stk;1129 return;1130 }1131 }11321133 /* Try to read per-directory file */1134 hashclr(sha1_stat.sha1);1135 sha1_stat.valid = 0;1136 if (dir->exclude_per_dir &&1137 /*1138 * If we know that no files have been added in1139 * this directory (i.e. valid_cached_dir() has1140 * been executed and set untracked->valid) ..1141 */1142 (!untracked || !untracked->valid ||1143 /*1144 * .. and .gitignore does not exist before1145 * (i.e. null exclude_sha1). Then we can skip1146 * loading .gitignore, which would result in1147 * ENOENT anyway.1148 */1149 !is_null_sha1(untracked->exclude_sha1))) {1150 /*1151 * dir->basebuf gets reused by the traversal, but we1152 * need fname to remain unchanged to ensure the src1153 * member of each struct exclude correctly1154 * back-references its source file. Other invocations1155 * of add_exclude_list provide stable strings, so we1156 * strbuf_detach() and free() here in the caller.1157 */1158 struct strbuf sb = STRBUF_INIT;1159 strbuf_addbuf(&sb, &dir->basebuf);1160 strbuf_addstr(&sb, dir->exclude_per_dir);1161 el->src = strbuf_detach(&sb, NULL);1162 add_excludes(el->src, el->src, stk->baselen, el, 1,1163 untracked ? &sha1_stat : NULL);1164 }1165 /*1166 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1167 * will first be called in valid_cached_dir() then maybe many1168 * times more in last_exclude_matching(). When the cache is1169 * used, last_exclude_matching() will not be called and1170 * reading .gitignore content will be a waste.1171 *1172 * So when it's called by valid_cached_dir() and we can get1173 * .gitignore SHA-1 from the index (i.e. .gitignore is not1174 * modified on work tree), we could delay reading the1175 * .gitignore content until we absolutely need it in1176 * last_exclude_matching(). Be careful about ignore rule1177 * order, though, if you do that.1178 */1179 if (untracked &&1180 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {1181 invalidate_gitignore(dir->untracked, untracked);1182 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);1183 }1184 dir->exclude_stack = stk;1185 current = stk->baselen;1186 }1187 strbuf_setlen(&dir->basebuf, baselen);1188}11891190/*1191 * Loads the exclude lists for the directory containing pathname, then1192 * scans all exclude lists to determine whether pathname is excluded.1193 * Returns the exclude_list element which matched, or NULL for1194 * undecided.1195 */1196struct exclude *last_exclude_matching(struct dir_struct *dir,1197 const char *pathname,1198 int *dtype_p)1199{1200 int pathlen = strlen(pathname);1201 const char *basename = strrchr(pathname, '/');1202 basename = (basename) ? basename+1 : pathname;12031204 prep_exclude(dir, pathname, basename-pathname);12051206 if (dir->exclude)1207 return dir->exclude;12081209 return last_exclude_matching_from_lists(dir, pathname, pathlen,1210 basename, dtype_p);1211}12121213/*1214 * Loads the exclude lists for the directory containing pathname, then1215 * scans all exclude lists to determine whether pathname is excluded.1216 * Returns 1 if true, otherwise 0.1217 */1218int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)1219{1220 struct exclude *exclude =1221 last_exclude_matching(dir, pathname, dtype_p);1222 if (exclude)1223 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1224 return 0;1225}12261227static struct dir_entry *dir_entry_new(const char *pathname, int len)1228{1229 struct dir_entry *ent;12301231 FLEX_ALLOC_MEM(ent, name, pathname, len);1232 ent->len = len;1233 return ent;1234}12351236static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)1237{1238 if (cache_file_exists(pathname, len, ignore_case))1239 return NULL;12401241 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1242 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);1243}12441245struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)1246{1247 if (!cache_name_is_other(pathname, len))1248 return NULL;12491250 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1251 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);1252}12531254enum exist_status {1255 index_nonexistent = 0,1256 index_directory,1257 index_gitdir1258};12591260/*1261 * Do not use the alphabetically sorted index to look up1262 * the directory name; instead, use the case insensitive1263 * directory hash.1264 */1265static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)1266{1267 struct cache_entry *ce;12681269 if (cache_dir_exists(dirname, len))1270 return index_directory;12711272 ce = cache_file_exists(dirname, len, ignore_case);1273 if (ce && S_ISGITLINK(ce->ce_mode))1274 return index_gitdir;12751276 return index_nonexistent;1277}12781279/*1280 * The index sorts alphabetically by entry name, which1281 * means that a gitlink sorts as '\0' at the end, while1282 * a directory (which is defined not as an entry, but as1283 * the files it contains) will sort with the '/' at the1284 * end.1285 */1286static enum exist_status directory_exists_in_index(const char *dirname, int len)1287{1288 int pos;12891290 if (ignore_case)1291 return directory_exists_in_index_icase(dirname, len);12921293 pos = cache_name_pos(dirname, len);1294 if (pos < 0)1295 pos = -pos-1;1296 while (pos < active_nr) {1297 const struct cache_entry *ce = active_cache[pos++];1298 unsigned char endchar;12991300 if (strncmp(ce->name, dirname, len))1301 break;1302 endchar = ce->name[len];1303 if (endchar > '/')1304 break;1305 if (endchar == '/')1306 return index_directory;1307 if (!endchar && S_ISGITLINK(ce->ce_mode))1308 return index_gitdir;1309 }1310 return index_nonexistent;1311}13121313/*1314 * When we find a directory when traversing the filesystem, we1315 * have three distinct cases:1316 *1317 * - ignore it1318 * - see it as a directory1319 * - recurse into it1320 *1321 * and which one we choose depends on a combination of existing1322 * git index contents and the flags passed into the directory1323 * traversal routine.1324 *1325 * Case 1: If we *already* have entries in the index under that1326 * directory name, we always recurse into the directory to see1327 * all the files.1328 *1329 * Case 2: If we *already* have that directory name as a gitlink,1330 * we always continue to see it as a gitlink, regardless of whether1331 * there is an actual git directory there or not (it might not1332 * be checked out as a subproject!)1333 *1334 * Case 3: if we didn't have it in the index previously, we1335 * have a few sub-cases:1336 *1337 * (a) if "show_other_directories" is true, we show it as1338 * just a directory, unless "hide_empty_directories" is1339 * also true, in which case we need to check if it contains any1340 * untracked and / or ignored files.1341 * (b) if it looks like a git directory, and we don't have1342 * 'no_gitlinks' set we treat it as a gitlink, and show it1343 * as a directory.1344 * (c) otherwise, we recurse into it.1345 */1346static enum path_treatment treat_directory(struct dir_struct *dir,1347 struct untracked_cache_dir *untracked,1348 const char *dirname, int len, int baselen, int exclude,1349 const struct pathspec *pathspec)1350{1351 /* The "len-1" is to strip the final '/' */1352 switch (directory_exists_in_index(dirname, len-1)) {1353 case index_directory:1354 return path_recurse;13551356 case index_gitdir:1357 return path_none;13581359 case index_nonexistent:1360 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1361 break;1362 if (!(dir->flags & DIR_NO_GITLINKS)) {1363 unsigned char sha1[20];1364 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)1365 return path_untracked;1366 }1367 return path_recurse;1368 }13691370 /* This is the "show_other_directories" case */13711372 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1373 return exclude ? path_excluded : path_untracked;13741375 untracked = lookup_untracked(dir->untracked, untracked,1376 dirname + baselen, len - baselen);1377 return read_directory_recursive(dir, dirname, len,1378 untracked, 1, pathspec);1379}13801381/*1382 * This is an inexact early pruning of any recursive directory1383 * reading - if the path cannot possibly be in the pathspec,1384 * return true, and we'll skip it early.1385 */1386static int simplify_away(const char *path, int pathlen,1387 const struct pathspec *pathspec)1388{1389 int i;13901391 if (!pathspec || !pathspec->nr)1392 return 0;13931394 GUARD_PATHSPEC(pathspec,1395 PATHSPEC_FROMTOP |1396 PATHSPEC_MAXDEPTH |1397 PATHSPEC_LITERAL |1398 PATHSPEC_GLOB |1399 PATHSPEC_ICASE |1400 PATHSPEC_EXCLUDE |1401 PATHSPEC_ATTR);14021403 for (i = 0; i < pathspec->nr; i++) {1404 const struct pathspec_item *item = &pathspec->items[i];1405 int len = item->nowildcard_len;14061407 if (len > pathlen)1408 len = pathlen;1409 if (!ps_strncmp(item, item->match, path, len))1410 return 0;1411 }14121413 return 1;1414}14151416/*1417 * This function tells us whether an excluded path matches a1418 * list of "interesting" pathspecs. That is, whether a path matched1419 * by any of the pathspecs could possibly be ignored by excluding1420 * the specified path. This can happen if:1421 *1422 * 1. the path is mentioned explicitly in the pathspec1423 *1424 * 2. the path is a directory prefix of some element in the1425 * pathspec1426 */1427static int exclude_matches_pathspec(const char *path, int pathlen,1428 const struct pathspec *pathspec)1429{1430 int i;14311432 if (!pathspec || !pathspec->nr)1433 return 0;14341435 GUARD_PATHSPEC(pathspec,1436 PATHSPEC_FROMTOP |1437 PATHSPEC_MAXDEPTH |1438 PATHSPEC_LITERAL |1439 PATHSPEC_GLOB |1440 PATHSPEC_ICASE |1441 PATHSPEC_EXCLUDE);14421443 for (i = 0; i < pathspec->nr; i++) {1444 const struct pathspec_item *item = &pathspec->items[i];1445 int len = item->nowildcard_len;14461447 if (len == pathlen &&1448 !ps_strncmp(item, item->match, path, pathlen))1449 return 1;1450 if (len > pathlen &&1451 item->match[pathlen] == '/' &&1452 !ps_strncmp(item, item->match, path, pathlen))1453 return 1;1454 }1455 return 0;1456}14571458static int get_index_dtype(const char *path, int len)1459{1460 int pos;1461 const struct cache_entry *ce;14621463 ce = cache_file_exists(path, len, 0);1464 if (ce) {1465 if (!ce_uptodate(ce))1466 return DT_UNKNOWN;1467 if (S_ISGITLINK(ce->ce_mode))1468 return DT_DIR;1469 /*1470 * Nobody actually cares about the1471 * difference between DT_LNK and DT_REG1472 */1473 return DT_REG;1474 }14751476 /* Try to look it up as a directory */1477 pos = cache_name_pos(path, len);1478 if (pos >= 0)1479 return DT_UNKNOWN;1480 pos = -pos-1;1481 while (pos < active_nr) {1482 ce = active_cache[pos++];1483 if (strncmp(ce->name, path, len))1484 break;1485 if (ce->name[len] > '/')1486 break;1487 if (ce->name[len] < '/')1488 continue;1489 if (!ce_uptodate(ce))1490 break; /* continue? */1491 return DT_DIR;1492 }1493 return DT_UNKNOWN;1494}14951496static int get_dtype(struct dirent *de, const char *path, int len)1497{1498 int dtype = de ? DTYPE(de) : DT_UNKNOWN;1499 struct stat st;15001501 if (dtype != DT_UNKNOWN)1502 return dtype;1503 dtype = get_index_dtype(path, len);1504 if (dtype != DT_UNKNOWN)1505 return dtype;1506 if (lstat(path, &st))1507 return dtype;1508 if (S_ISREG(st.st_mode))1509 return DT_REG;1510 if (S_ISDIR(st.st_mode))1511 return DT_DIR;1512 if (S_ISLNK(st.st_mode))1513 return DT_LNK;1514 return dtype;1515}15161517static enum path_treatment treat_one_path(struct dir_struct *dir,1518 struct untracked_cache_dir *untracked,1519 struct strbuf *path,1520 int baselen,1521 const struct pathspec *pathspec,1522 int dtype, struct dirent *de)1523{1524 int exclude;1525 int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);15261527 if (dtype == DT_UNKNOWN)1528 dtype = get_dtype(de, path->buf, path->len);15291530 /* Always exclude indexed files */1531 if (dtype != DT_DIR && has_path_in_index)1532 return path_none;15331534 /*1535 * When we are looking at a directory P in the working tree,1536 * there are three cases:1537 *1538 * (1) P exists in the index. Everything inside the directory P in1539 * the working tree needs to go when P is checked out from the1540 * index.1541 *1542 * (2) P does not exist in the index, but there is P/Q in the index.1543 * We know P will stay a directory when we check out the contents1544 * of the index, but we do not know yet if there is a directory1545 * P/Q in the working tree to be killed, so we need to recurse.1546 *1547 * (3) P does not exist in the index, and there is no P/Q in the index1548 * to require P to be a directory, either. Only in this case, we1549 * know that everything inside P will not be killed without1550 * recursing.1551 */1552 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1553 (dtype == DT_DIR) &&1554 !has_path_in_index &&1555 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))1556 return path_none;15571558 exclude = is_excluded(dir, path->buf, &dtype);15591560 /*1561 * Excluded? If we don't explicitly want to show1562 * ignored files, ignore it1563 */1564 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1565 return path_excluded;15661567 switch (dtype) {1568 default:1569 return path_none;1570 case DT_DIR:1571 strbuf_addch(path, '/');1572 return treat_directory(dir, untracked, path->buf, path->len,1573 baselen, exclude, pathspec);1574 case DT_REG:1575 case DT_LNK:1576 return exclude ? path_excluded : path_untracked;1577 }1578}15791580static enum path_treatment treat_path_fast(struct dir_struct *dir,1581 struct untracked_cache_dir *untracked,1582 struct cached_dir *cdir,1583 struct strbuf *path,1584 int baselen,1585 const struct pathspec *pathspec)1586{1587 strbuf_setlen(path, baselen);1588 if (!cdir->ucd) {1589 strbuf_addstr(path, cdir->file);1590 return path_untracked;1591 }1592 strbuf_addstr(path, cdir->ucd->name);1593 /* treat_one_path() does this before it calls treat_directory() */1594 strbuf_complete(path, '/');1595 if (cdir->ucd->check_only)1596 /*1597 * check_only is set as a result of treat_directory() getting1598 * to its bottom. Verify again the same set of directories1599 * with check_only set.1600 */1601 return read_directory_recursive(dir, path->buf, path->len,1602 cdir->ucd, 1, pathspec);1603 /*1604 * We get path_recurse in the first run when1605 * directory_exists_in_index() returns index_nonexistent. We1606 * are sure that new changes in the index does not impact the1607 * outcome. Return now.1608 */1609 return path_recurse;1610}16111612static enum path_treatment treat_path(struct dir_struct *dir,1613 struct untracked_cache_dir *untracked,1614 struct cached_dir *cdir,1615 struct strbuf *path,1616 int baselen,1617 const struct pathspec *pathspec)1618{1619 int dtype;1620 struct dirent *de = cdir->de;16211622 if (!de)1623 return treat_path_fast(dir, untracked, cdir, path,1624 baselen, pathspec);1625 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))1626 return path_none;1627 strbuf_setlen(path, baselen);1628 strbuf_addstr(path, de->d_name);1629 if (simplify_away(path->buf, path->len, pathspec))1630 return path_none;16311632 dtype = DTYPE(de);1633 return treat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);1634}16351636static void add_untracked(struct untracked_cache_dir *dir, const char *name)1637{1638 if (!dir)1639 return;1640 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,1641 dir->untracked_alloc);1642 dir->untracked[dir->untracked_nr++] = xstrdup(name);1643}16441645static int valid_cached_dir(struct dir_struct *dir,1646 struct untracked_cache_dir *untracked,1647 struct strbuf *path,1648 int check_only)1649{1650 struct stat st;16511652 if (!untracked)1653 return 0;16541655 if (stat(path->len ? path->buf : ".", &st)) {1656 invalidate_directory(dir->untracked, untracked);1657 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));1658 return 0;1659 }1660 if (!untracked->valid ||1661 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {1662 if (untracked->valid)1663 invalidate_directory(dir->untracked, untracked);1664 fill_stat_data(&untracked->stat_data, &st);1665 return 0;1666 }16671668 if (untracked->check_only != !!check_only) {1669 invalidate_directory(dir->untracked, untracked);1670 return 0;1671 }16721673 /*1674 * prep_exclude will be called eventually on this directory,1675 * but it's called much later in last_exclude_matching(). We1676 * need it now to determine the validity of the cache for this1677 * path. The next calls will be nearly no-op, the way1678 * prep_exclude() is designed.1679 */1680 if (path->len && path->buf[path->len - 1] != '/') {1681 strbuf_addch(path, '/');1682 prep_exclude(dir, path->buf, path->len);1683 strbuf_setlen(path, path->len - 1);1684 } else1685 prep_exclude(dir, path->buf, path->len);16861687 /* hopefully prep_exclude() haven't invalidated this entry... */1688 return untracked->valid;1689}16901691static int open_cached_dir(struct cached_dir *cdir,1692 struct dir_struct *dir,1693 struct untracked_cache_dir *untracked,1694 struct strbuf *path,1695 int check_only)1696{1697 memset(cdir, 0, sizeof(*cdir));1698 cdir->untracked = untracked;1699 if (valid_cached_dir(dir, untracked, path, check_only))1700 return 0;1701 cdir->fdir = opendir(path->len ? path->buf : ".");1702 if (dir->untracked)1703 dir->untracked->dir_opened++;1704 if (!cdir->fdir)1705 return -1;1706 return 0;1707}17081709static int read_cached_dir(struct cached_dir *cdir)1710{1711 if (cdir->fdir) {1712 cdir->de = readdir(cdir->fdir);1713 if (!cdir->de)1714 return -1;1715 return 0;1716 }1717 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {1718 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1719 if (!d->recurse) {1720 cdir->nr_dirs++;1721 continue;1722 }1723 cdir->ucd = d;1724 cdir->nr_dirs++;1725 return 0;1726 }1727 cdir->ucd = NULL;1728 if (cdir->nr_files < cdir->untracked->untracked_nr) {1729 struct untracked_cache_dir *d = cdir->untracked;1730 cdir->file = d->untracked[cdir->nr_files++];1731 return 0;1732 }1733 return -1;1734}17351736static void close_cached_dir(struct cached_dir *cdir)1737{1738 if (cdir->fdir)1739 closedir(cdir->fdir);1740 /*1741 * We have gone through this directory and found no untracked1742 * entries. Mark it valid.1743 */1744 if (cdir->untracked) {1745 cdir->untracked->valid = 1;1746 cdir->untracked->recurse = 1;1747 }1748}17491750/*1751 * Read a directory tree. We currently ignore anything but1752 * directories, regular files and symlinks. That's because git1753 * doesn't handle them at all yet. Maybe that will change some1754 * day.1755 *1756 * Also, we ignore the name ".git" (even if it is not a directory).1757 * That likely will not change.1758 *1759 * Returns the most significant path_treatment value encountered in the scan.1760 */1761static enum path_treatment read_directory_recursive(struct dir_struct *dir,1762 const char *base, int baselen,1763 struct untracked_cache_dir *untracked, int check_only,1764 const struct pathspec *pathspec)1765{1766 struct cached_dir cdir;1767 enum path_treatment state, subdir_state, dir_state = path_none;1768 struct strbuf path = STRBUF_INIT;17691770 strbuf_add(&path, base, baselen);17711772 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))1773 goto out;17741775 if (untracked)1776 untracked->check_only = !!check_only;17771778 while (!read_cached_dir(&cdir)) {1779 /* check how the file or directory should be treated */1780 state = treat_path(dir, untracked, &cdir, &path,1781 baselen, pathspec);17821783 if (state > dir_state)1784 dir_state = state;17851786 /* recurse into subdir if instructed by treat_path */1787 if (state == path_recurse) {1788 struct untracked_cache_dir *ud;1789 ud = lookup_untracked(dir->untracked, untracked,1790 path.buf + baselen,1791 path.len - baselen);1792 subdir_state =1793 read_directory_recursive(dir, path.buf,1794 path.len, ud,1795 check_only, pathspec);1796 if (subdir_state > dir_state)1797 dir_state = subdir_state;1798 }17991800 if (check_only) {1801 /* abort early if maximum state has been reached */1802 if (dir_state == path_untracked) {1803 if (cdir.fdir)1804 add_untracked(untracked, path.buf + baselen);1805 break;1806 }1807 /* skip the dir_add_* part */1808 continue;1809 }18101811 /* add the path to the appropriate result list */1812 switch (state) {1813 case path_excluded:1814 if (dir->flags & DIR_SHOW_IGNORED)1815 dir_add_name(dir, path.buf, path.len);1816 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||1817 ((dir->flags & DIR_COLLECT_IGNORED) &&1818 exclude_matches_pathspec(path.buf, path.len,1819 pathspec)))1820 dir_add_ignored(dir, path.buf, path.len);1821 break;18221823 case path_untracked:1824 if (dir->flags & DIR_SHOW_IGNORED)1825 break;1826 dir_add_name(dir, path.buf, path.len);1827 if (cdir.fdir)1828 add_untracked(untracked, path.buf + baselen);1829 break;18301831 default:1832 break;1833 }1834 }1835 close_cached_dir(&cdir);1836 out:1837 strbuf_release(&path);18381839 return dir_state;1840}18411842static int cmp_name(const void *p1, const void *p2)1843{1844 const struct dir_entry *e1 = *(const struct dir_entry **)p1;1845 const struct dir_entry *e2 = *(const struct dir_entry **)p2;18461847 return name_compare(e1->name, e1->len, e2->name, e2->len);1848}18491850static int treat_leading_path(struct dir_struct *dir,1851 const char *path, int len,1852 const struct pathspec *pathspec)1853{1854 struct strbuf sb = STRBUF_INIT;1855 int baselen, rc = 0;1856 const char *cp;1857 int old_flags = dir->flags;18581859 while (len && path[len - 1] == '/')1860 len--;1861 if (!len)1862 return 1;1863 baselen = 0;1864 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;1865 while (1) {1866 cp = path + baselen + !!baselen;1867 cp = memchr(cp, '/', path + len - cp);1868 if (!cp)1869 baselen = len;1870 else1871 baselen = cp - path;1872 strbuf_setlen(&sb, 0);1873 strbuf_add(&sb, path, baselen);1874 if (!is_directory(sb.buf))1875 break;1876 if (simplify_away(sb.buf, sb.len, pathspec))1877 break;1878 if (treat_one_path(dir, NULL, &sb, baselen, pathspec,1879 DT_DIR, NULL) == path_none)1880 break; /* do not recurse into it */1881 if (len <= baselen) {1882 rc = 1;1883 break; /* finished checking */1884 }1885 }1886 strbuf_release(&sb);1887 dir->flags = old_flags;1888 return rc;1889}18901891static const char *get_ident_string(void)1892{1893 static struct strbuf sb = STRBUF_INIT;1894 struct utsname uts;18951896 if (sb.len)1897 return sb.buf;1898 if (uname(&uts) < 0)1899 die_errno(_("failed to get kernel name and information"));1900 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),1901 uts.sysname);1902 return sb.buf;1903}19041905static int ident_in_untracked(const struct untracked_cache *uc)1906{1907 /*1908 * Previous git versions may have saved many NUL separated1909 * strings in the "ident" field, but it is insane to manage1910 * many locations, so just take care of the first one.1911 */19121913 return !strcmp(uc->ident.buf, get_ident_string());1914}19151916static void set_untracked_ident(struct untracked_cache *uc)1917{1918 strbuf_reset(&uc->ident);1919 strbuf_addstr(&uc->ident, get_ident_string());19201921 /*1922 * This strbuf used to contain a list of NUL separated1923 * strings, so save NUL too for backward compatibility.1924 */1925 strbuf_addch(&uc->ident, 0);1926}19271928static void new_untracked_cache(struct index_state *istate)1929{1930 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));1931 strbuf_init(&uc->ident, 100);1932 uc->exclude_per_dir = ".gitignore";1933 /* should be the same flags used by git-status */1934 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;1935 set_untracked_ident(uc);1936 istate->untracked = uc;1937 istate->cache_changed |= UNTRACKED_CHANGED;1938}19391940void add_untracked_cache(struct index_state *istate)1941{1942 if (!istate->untracked) {1943 new_untracked_cache(istate);1944 } else {1945 if (!ident_in_untracked(istate->untracked)) {1946 free_untracked_cache(istate->untracked);1947 new_untracked_cache(istate);1948 }1949 }1950}19511952void remove_untracked_cache(struct index_state *istate)1953{1954 if (istate->untracked) {1955 free_untracked_cache(istate->untracked);1956 istate->untracked = NULL;1957 istate->cache_changed |= UNTRACKED_CHANGED;1958 }1959}19601961static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,1962 int base_len,1963 const struct pathspec *pathspec)1964{1965 struct untracked_cache_dir *root;19661967 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))1968 return NULL;19691970 /*1971 * We only support $GIT_DIR/info/exclude and core.excludesfile1972 * as the global ignore rule files. Any other additions1973 * (e.g. from command line) invalidate the cache. This1974 * condition also catches running setup_standard_excludes()1975 * before setting dir->untracked!1976 */1977 if (dir->unmanaged_exclude_files)1978 return NULL;19791980 /*1981 * Optimize for the main use case only: whole-tree git1982 * status. More work involved in treat_leading_path() if we1983 * use cache on just a subset of the worktree. pathspec1984 * support could make the matter even worse.1985 */1986 if (base_len || (pathspec && pathspec->nr))1987 return NULL;19881989 /* Different set of flags may produce different results */1990 if (dir->flags != dir->untracked->dir_flags ||1991 /*1992 * See treat_directory(), case index_nonexistent. Without1993 * this flag, we may need to also cache .git file content1994 * for the resolve_gitlink_ref() call, which we don't.1995 */1996 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||1997 /* We don't support collecting ignore files */1998 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |1999 DIR_COLLECT_IGNORED)))2000 return NULL;20012002 /*2003 * If we use .gitignore in the cache and now you change it to2004 * .gitexclude, everything will go wrong.2005 */2006 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&2007 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))2008 return NULL;20092010 /*2011 * EXC_CMDL is not considered in the cache. If people set it,2012 * skip the cache.2013 */2014 if (dir->exclude_list_group[EXC_CMDL].nr)2015 return NULL;20162017 if (!ident_in_untracked(dir->untracked)) {2018 warning(_("Untracked cache is disabled on this system or location."));2019 return NULL;2020 }20212022 if (!dir->untracked->root) {2023 const int len = sizeof(*dir->untracked->root);2024 dir->untracked->root = xmalloc(len);2025 memset(dir->untracked->root, 0, len);2026 }20272028 /* Validate $GIT_DIR/info/exclude and core.excludesfile */2029 root = dir->untracked->root;2030 if (hashcmp(dir->ss_info_exclude.sha1,2031 dir->untracked->ss_info_exclude.sha1)) {2032 invalidate_gitignore(dir->untracked, root);2033 dir->untracked->ss_info_exclude = dir->ss_info_exclude;2034 }2035 if (hashcmp(dir->ss_excludes_file.sha1,2036 dir->untracked->ss_excludes_file.sha1)) {2037 invalidate_gitignore(dir->untracked, root);2038 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2039 }20402041 /* Make sure this directory is not dropped out at saving phase */2042 root->recurse = 1;2043 return root;2044}20452046int read_directory(struct dir_struct *dir, const char *path,2047 int len, const struct pathspec *pathspec)2048{2049 struct untracked_cache_dir *untracked;20502051 if (has_symlink_leading_path(path, len))2052 return dir->nr;20532054 untracked = validate_untracked_cache(dir, len, pathspec);2055 if (!untracked)2056 /*2057 * make sure untracked cache code path is disabled,2058 * e.g. prep_exclude()2059 */2060 dir->untracked = NULL;2061 if (!len || treat_leading_path(dir, path, len, pathspec))2062 read_directory_recursive(dir, path, len, untracked, 0, pathspec);2063 QSORT(dir->entries, dir->nr, cmp_name);2064 QSORT(dir->ignored, dir->ignored_nr, cmp_name);2065 if (dir->untracked) {2066 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);2067 trace_printf_key(&trace_untracked_stats,2068 "node creation: %u\n"2069 "gitignore invalidation: %u\n"2070 "directory invalidation: %u\n"2071 "opendir: %u\n",2072 dir->untracked->dir_created,2073 dir->untracked->gitignore_invalidated,2074 dir->untracked->dir_invalidated,2075 dir->untracked->dir_opened);2076 if (dir->untracked == the_index.untracked &&2077 (dir->untracked->dir_opened ||2078 dir->untracked->gitignore_invalidated ||2079 dir->untracked->dir_invalidated))2080 the_index.cache_changed |= UNTRACKED_CHANGED;2081 if (dir->untracked != the_index.untracked) {2082 free(dir->untracked);2083 dir->untracked = NULL;2084 }2085 }2086 return dir->nr;2087}20882089int file_exists(const char *f)2090{2091 struct stat sb;2092 return lstat(f, &sb) == 0;2093}20942095static int cmp_icase(char a, char b)2096{2097 if (a == b)2098 return 0;2099 if (ignore_case)2100 return toupper(a) - toupper(b);2101 return a - b;2102}21032104/*2105 * Given two normalized paths (a trailing slash is ok), if subdir is2106 * outside dir, return -1. Otherwise return the offset in subdir that2107 * can be used as relative path to dir.2108 */2109int dir_inside_of(const char *subdir, const char *dir)2110{2111 int offset = 0;21122113 assert(dir && subdir && *dir && *subdir);21142115 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {2116 dir++;2117 subdir++;2118 offset++;2119 }21202121 /* hel[p]/me vs hel[l]/yeah */2122 if (*dir && *subdir)2123 return -1;21242125 if (!*subdir)2126 return !*dir ? offset : -1; /* same dir */21272128 /* foo/[b]ar vs foo/[] */2129 if (is_dir_sep(dir[-1]))2130 return is_dir_sep(subdir[-1]) ? offset : -1;21312132 /* foo[/]bar vs foo[] */2133 return is_dir_sep(*subdir) ? offset + 1 : -1;2134}21352136int is_inside_dir(const char *dir)2137{2138 char *cwd;2139 int rc;21402141 if (!dir)2142 return 0;21432144 cwd = xgetcwd();2145 rc = (dir_inside_of(cwd, dir) >= 0);2146 free(cwd);2147 return rc;2148}21492150int is_empty_dir(const char *path)2151{2152 DIR *dir = opendir(path);2153 struct dirent *e;2154 int ret = 1;21552156 if (!dir)2157 return 0;21582159 while ((e = readdir(dir)) != NULL)2160 if (!is_dot_or_dotdot(e->d_name)) {2161 ret = 0;2162 break;2163 }21642165 closedir(dir);2166 return ret;2167}21682169static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)2170{2171 DIR *dir;2172 struct dirent *e;2173 int ret = 0, original_len = path->len, len, kept_down = 0;2174 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2175 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2176 unsigned char submodule_head[20];21772178 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2179 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {2180 /* Do not descend and nuke a nested git work tree. */2181 if (kept_up)2182 *kept_up = 1;2183 return 0;2184 }21852186 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2187 dir = opendir(path->buf);2188 if (!dir) {2189 if (errno == ENOENT)2190 return keep_toplevel ? -1 : 0;2191 else if (errno == EACCES && !keep_toplevel)2192 /*2193 * An empty dir could be removable even if it2194 * is unreadable:2195 */2196 return rmdir(path->buf);2197 else2198 return -1;2199 }2200 strbuf_complete(path, '/');22012202 len = path->len;2203 while ((e = readdir(dir)) != NULL) {2204 struct stat st;2205 if (is_dot_or_dotdot(e->d_name))2206 continue;22072208 strbuf_setlen(path, len);2209 strbuf_addstr(path, e->d_name);2210 if (lstat(path->buf, &st)) {2211 if (errno == ENOENT)2212 /*2213 * file disappeared, which is what we2214 * wanted anyway2215 */2216 continue;2217 /* fall thru */2218 } else if (S_ISDIR(st.st_mode)) {2219 if (!remove_dir_recurse(path, flag, &kept_down))2220 continue; /* happy */2221 } else if (!only_empty &&2222 (!unlink(path->buf) || errno == ENOENT)) {2223 continue; /* happy, too */2224 }22252226 /* path too long, stat fails, or non-directory still exists */2227 ret = -1;2228 break;2229 }2230 closedir(dir);22312232 strbuf_setlen(path, original_len);2233 if (!ret && !keep_toplevel && !kept_down)2234 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;2235 else if (kept_up)2236 /*2237 * report the uplevel that it is not an error that we2238 * did not rmdir() our directory.2239 */2240 *kept_up = !ret;2241 return ret;2242}22432244int remove_dir_recursively(struct strbuf *path, int flag)2245{2246 return remove_dir_recurse(path, flag, NULL);2247}22482249static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")22502251void setup_standard_excludes(struct dir_struct *dir)2252{2253 dir->exclude_per_dir = ".gitignore";22542255 /* core.excludefile defaulting to $XDG_HOME/git/ignore */2256 if (!excludes_file)2257 excludes_file = xdg_config_home("ignore");2258 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))2259 add_excludes_from_file_1(dir, excludes_file,2260 dir->untracked ? &dir->ss_excludes_file : NULL);22612262 /* per repository user preference */2263 if (startup_info->have_repository) {2264 const char *path = git_path_info_exclude();2265 if (!access_or_warn(path, R_OK, 0))2266 add_excludes_from_file_1(dir, path,2267 dir->untracked ? &dir->ss_info_exclude : NULL);2268 }2269}22702271int remove_path(const char *name)2272{2273 char *slash;22742275 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)2276 return -1;22772278 slash = strrchr(name, '/');2279 if (slash) {2280 char *dirs = xstrdup(name);2281 slash = dirs + (slash - name);2282 do {2283 *slash = '\0';2284 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));2285 free(dirs);2286 }2287 return 0;2288}22892290/*2291 * Frees memory within dir which was allocated for exclude lists and2292 * the exclude_stack. Does not free dir itself.2293 */2294void clear_directory(struct dir_struct *dir)2295{2296 int i, j;2297 struct exclude_list_group *group;2298 struct exclude_list *el;2299 struct exclude_stack *stk;23002301 for (i = EXC_CMDL; i <= EXC_FILE; i++) {2302 group = &dir->exclude_list_group[i];2303 for (j = 0; j < group->nr; j++) {2304 el = &group->el[j];2305 if (i == EXC_DIRS)2306 free((char *)el->src);2307 clear_exclude_list(el);2308 }2309 free(group->el);2310 }23112312 stk = dir->exclude_stack;2313 while (stk) {2314 struct exclude_stack *prev = stk->prev;2315 free(stk);2316 stk = prev;2317 }2318 strbuf_release(&dir->basebuf);2319}23202321struct ondisk_untracked_cache {2322 struct stat_data info_exclude_stat;2323 struct stat_data excludes_file_stat;2324 uint32_t dir_flags;2325 unsigned char info_exclude_sha1[20];2326 unsigned char excludes_file_sha1[20];2327 char exclude_per_dir[FLEX_ARRAY];2328};23292330#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)23312332struct write_data {2333 int index; /* number of written untracked_cache_dir */2334 struct ewah_bitmap *check_only; /* from untracked_cache_dir */2335 struct ewah_bitmap *valid; /* from untracked_cache_dir */2336 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */2337 struct strbuf out;2338 struct strbuf sb_stat;2339 struct strbuf sb_sha1;2340};23412342static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)2343{2344 to->sd_ctime.sec = htonl(from->sd_ctime.sec);2345 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);2346 to->sd_mtime.sec = htonl(from->sd_mtime.sec);2347 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);2348 to->sd_dev = htonl(from->sd_dev);2349 to->sd_ino = htonl(from->sd_ino);2350 to->sd_uid = htonl(from->sd_uid);2351 to->sd_gid = htonl(from->sd_gid);2352 to->sd_size = htonl(from->sd_size);2353}23542355static void write_one_dir(struct untracked_cache_dir *untracked,2356 struct write_data *wd)2357{2358 struct stat_data stat_data;2359 struct strbuf *out = &wd->out;2360 unsigned char intbuf[16];2361 unsigned int intlen, value;2362 int i = wd->index++;23632364 /*2365 * untracked_nr should be reset whenever valid is clear, but2366 * for safety..2367 */2368 if (!untracked->valid) {2369 untracked->untracked_nr = 0;2370 untracked->check_only = 0;2371 }23722373 if (untracked->check_only)2374 ewah_set(wd->check_only, i);2375 if (untracked->valid) {2376 ewah_set(wd->valid, i);2377 stat_data_to_disk(&stat_data, &untracked->stat_data);2378 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));2379 }2380 if (!is_null_sha1(untracked->exclude_sha1)) {2381 ewah_set(wd->sha1_valid, i);2382 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);2383 }23842385 intlen = encode_varint(untracked->untracked_nr, intbuf);2386 strbuf_add(out, intbuf, intlen);23872388 /* skip non-recurse directories */2389 for (i = 0, value = 0; i < untracked->dirs_nr; i++)2390 if (untracked->dirs[i]->recurse)2391 value++;2392 intlen = encode_varint(value, intbuf);2393 strbuf_add(out, intbuf, intlen);23942395 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);23962397 for (i = 0; i < untracked->untracked_nr; i++)2398 strbuf_add(out, untracked->untracked[i],2399 strlen(untracked->untracked[i]) + 1);24002401 for (i = 0; i < untracked->dirs_nr; i++)2402 if (untracked->dirs[i]->recurse)2403 write_one_dir(untracked->dirs[i], wd);2404}24052406void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)2407{2408 struct ondisk_untracked_cache *ouc;2409 struct write_data wd;2410 unsigned char varbuf[16];2411 int varint_len;2412 size_t len = strlen(untracked->exclude_per_dir);24132414 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);2415 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2416 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2417 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);2418 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);2419 ouc->dir_flags = htonl(untracked->dir_flags);24202421 varint_len = encode_varint(untracked->ident.len, varbuf);2422 strbuf_add(out, varbuf, varint_len);2423 strbuf_addbuf(out, &untracked->ident);24242425 strbuf_add(out, ouc, ouc_size(len));2426 free(ouc);2427 ouc = NULL;24282429 if (!untracked->root) {2430 varint_len = encode_varint(0, varbuf);2431 strbuf_add(out, varbuf, varint_len);2432 return;2433 }24342435 wd.index = 0;2436 wd.check_only = ewah_new();2437 wd.valid = ewah_new();2438 wd.sha1_valid = ewah_new();2439 strbuf_init(&wd.out, 1024);2440 strbuf_init(&wd.sb_stat, 1024);2441 strbuf_init(&wd.sb_sha1, 1024);2442 write_one_dir(untracked->root, &wd);24432444 varint_len = encode_varint(wd.index, varbuf);2445 strbuf_add(out, varbuf, varint_len);2446 strbuf_addbuf(out, &wd.out);2447 ewah_serialize_strbuf(wd.valid, out);2448 ewah_serialize_strbuf(wd.check_only, out);2449 ewah_serialize_strbuf(wd.sha1_valid, out);2450 strbuf_addbuf(out, &wd.sb_stat);2451 strbuf_addbuf(out, &wd.sb_sha1);2452 strbuf_addch(out, '\0'); /* safe guard for string lists */24532454 ewah_free(wd.valid);2455 ewah_free(wd.check_only);2456 ewah_free(wd.sha1_valid);2457 strbuf_release(&wd.out);2458 strbuf_release(&wd.sb_stat);2459 strbuf_release(&wd.sb_sha1);2460}24612462static void free_untracked(struct untracked_cache_dir *ucd)2463{2464 int i;2465 if (!ucd)2466 return;2467 for (i = 0; i < ucd->dirs_nr; i++)2468 free_untracked(ucd->dirs[i]);2469 for (i = 0; i < ucd->untracked_nr; i++)2470 free(ucd->untracked[i]);2471 free(ucd->untracked);2472 free(ucd->dirs);2473 free(ucd);2474}24752476void free_untracked_cache(struct untracked_cache *uc)2477{2478 if (uc)2479 free_untracked(uc->root);2480 free(uc);2481}24822483struct read_data {2484 int index;2485 struct untracked_cache_dir **ucd;2486 struct ewah_bitmap *check_only;2487 struct ewah_bitmap *valid;2488 struct ewah_bitmap *sha1_valid;2489 const unsigned char *data;2490 const unsigned char *end;2491};24922493static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)2494{2495 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);2496 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);2497 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);2498 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);2499 to->sd_dev = get_be32(&from->sd_dev);2500 to->sd_ino = get_be32(&from->sd_ino);2501 to->sd_uid = get_be32(&from->sd_uid);2502 to->sd_gid = get_be32(&from->sd_gid);2503 to->sd_size = get_be32(&from->sd_size);2504}25052506static int read_one_dir(struct untracked_cache_dir **untracked_,2507 struct read_data *rd)2508{2509 struct untracked_cache_dir ud, *untracked;2510 const unsigned char *next, *data = rd->data, *end = rd->end;2511 unsigned int value;2512 int i, len;25132514 memset(&ud, 0, sizeof(ud));25152516 next = data;2517 value = decode_varint(&next);2518 if (next > end)2519 return -1;2520 ud.recurse = 1;2521 ud.untracked_alloc = value;2522 ud.untracked_nr = value;2523 if (ud.untracked_nr)2524 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);2525 data = next;25262527 next = data;2528 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);2529 if (next > end)2530 return -1;2531 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);2532 data = next;25332534 len = strlen((const char *)data);2535 next = data + len + 1;2536 if (next > rd->end)2537 return -1;2538 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));2539 memcpy(untracked, &ud, sizeof(ud));2540 memcpy(untracked->name, data, len + 1);2541 data = next;25422543 for (i = 0; i < untracked->untracked_nr; i++) {2544 len = strlen((const char *)data);2545 next = data + len + 1;2546 if (next > rd->end)2547 return -1;2548 untracked->untracked[i] = xstrdup((const char*)data);2549 data = next;2550 }25512552 rd->ucd[rd->index++] = untracked;2553 rd->data = data;25542555 for (i = 0; i < untracked->dirs_nr; i++) {2556 len = read_one_dir(untracked->dirs + i, rd);2557 if (len < 0)2558 return -1;2559 }2560 return 0;2561}25622563static void set_check_only(size_t pos, void *cb)2564{2565 struct read_data *rd = cb;2566 struct untracked_cache_dir *ud = rd->ucd[pos];2567 ud->check_only = 1;2568}25692570static void read_stat(size_t pos, void *cb)2571{2572 struct read_data *rd = cb;2573 struct untracked_cache_dir *ud = rd->ucd[pos];2574 if (rd->data + sizeof(struct stat_data) > rd->end) {2575 rd->data = rd->end + 1;2576 return;2577 }2578 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);2579 rd->data += sizeof(struct stat_data);2580 ud->valid = 1;2581}25822583static void read_sha1(size_t pos, void *cb)2584{2585 struct read_data *rd = cb;2586 struct untracked_cache_dir *ud = rd->ucd[pos];2587 if (rd->data + 20 > rd->end) {2588 rd->data = rd->end + 1;2589 return;2590 }2591 hashcpy(ud->exclude_sha1, rd->data);2592 rd->data += 20;2593}25942595static void load_sha1_stat(struct sha1_stat *sha1_stat,2596 const struct stat_data *stat,2597 const unsigned char *sha1)2598{2599 stat_data_from_disk(&sha1_stat->stat, stat);2600 hashcpy(sha1_stat->sha1, sha1);2601 sha1_stat->valid = 1;2602}26032604struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)2605{2606 const struct ondisk_untracked_cache *ouc;2607 struct untracked_cache *uc;2608 struct read_data rd;2609 const unsigned char *next = data, *end = (const unsigned char *)data + sz;2610 const char *ident;2611 int ident_len, len;26122613 if (sz <= 1 || end[-1] != '\0')2614 return NULL;2615 end--;26162617 ident_len = decode_varint(&next);2618 if (next + ident_len > end)2619 return NULL;2620 ident = (const char *)next;2621 next += ident_len;26222623 ouc = (const struct ondisk_untracked_cache *)next;2624 if (next + ouc_size(0) > end)2625 return NULL;26262627 uc = xcalloc(1, sizeof(*uc));2628 strbuf_init(&uc->ident, ident_len);2629 strbuf_add(&uc->ident, ident, ident_len);2630 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,2631 ouc->info_exclude_sha1);2632 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,2633 ouc->excludes_file_sha1);2634 uc->dir_flags = get_be32(&ouc->dir_flags);2635 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);2636 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */2637 next += ouc_size(strlen(ouc->exclude_per_dir));2638 if (next >= end)2639 goto done2;26402641 len = decode_varint(&next);2642 if (next > end || len == 0)2643 goto done2;26442645 rd.valid = ewah_new();2646 rd.check_only = ewah_new();2647 rd.sha1_valid = ewah_new();2648 rd.data = next;2649 rd.end = end;2650 rd.index = 0;2651 ALLOC_ARRAY(rd.ucd, len);26522653 if (read_one_dir(&uc->root, &rd) || rd.index != len)2654 goto done;26552656 next = rd.data;2657 len = ewah_read_mmap(rd.valid, next, end - next);2658 if (len < 0)2659 goto done;26602661 next += len;2662 len = ewah_read_mmap(rd.check_only, next, end - next);2663 if (len < 0)2664 goto done;26652666 next += len;2667 len = ewah_read_mmap(rd.sha1_valid, next, end - next);2668 if (len < 0)2669 goto done;26702671 ewah_each_bit(rd.check_only, set_check_only, &rd);2672 rd.data = next + len;2673 ewah_each_bit(rd.valid, read_stat, &rd);2674 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);2675 next = rd.data;26762677done:2678 free(rd.ucd);2679 ewah_free(rd.valid);2680 ewah_free(rd.check_only);2681 ewah_free(rd.sha1_valid);2682done2:2683 if (next != end) {2684 free_untracked_cache(uc);2685 uc = NULL;2686 }2687 return uc;2688}26892690static void invalidate_one_directory(struct untracked_cache *uc,2691 struct untracked_cache_dir *ucd)2692{2693 uc->dir_invalidated++;2694 ucd->valid = 0;2695 ucd->untracked_nr = 0;2696}26972698/*2699 * Normally when an entry is added or removed from a directory,2700 * invalidating that directory is enough. No need to touch its2701 * ancestors. When a directory is shown as "foo/bar/" in git-status2702 * however, deleting or adding an entry may have cascading effect.2703 *2704 * Say the "foo/bar/file" has become untracked, we need to tell the2705 * untracked_cache_dir of "foo" that "bar/" is not an untracked2706 * directory any more (because "bar" is managed by foo as an untracked2707 * "file").2708 *2709 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2710 * was the last untracked entry in the entire "foo", we should show2711 * "foo/" instead. Which means we have to invalidate past "bar" up to2712 * "foo".2713 *2714 * This function traverses all directories from root to leaf. If there2715 * is a chance of one of the above cases happening, we invalidate back2716 * to root. Otherwise we just invalidate the leaf. There may be a more2717 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2718 * detect these cases and avoid unnecessary invalidation, for example,2719 * checking for the untracked entry named "bar/" in "foo", but for now2720 * stick to something safe and simple.2721 */2722static int invalidate_one_component(struct untracked_cache *uc,2723 struct untracked_cache_dir *dir,2724 const char *path, int len)2725{2726 const char *rest = strchr(path, '/');27272728 if (rest) {2729 int component_len = rest - path;2730 struct untracked_cache_dir *d =2731 lookup_untracked(uc, dir, path, component_len);2732 int ret =2733 invalidate_one_component(uc, d, rest + 1,2734 len - (component_len + 1));2735 if (ret)2736 invalidate_one_directory(uc, dir);2737 return ret;2738 }27392740 invalidate_one_directory(uc, dir);2741 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2742}27432744void untracked_cache_invalidate_path(struct index_state *istate,2745 const char *path)2746{2747 if (!istate->untracked || !istate->untracked->root)2748 return;2749 invalidate_one_component(istate->untracked, istate->untracked->root,2750 path, strlen(path));2751}27522753void untracked_cache_remove_from_index(struct index_state *istate,2754 const char *path)2755{2756 untracked_cache_invalidate_path(istate, path);2757}27582759void untracked_cache_add_to_index(struct index_state *istate,2760 const char *path)2761{2762 untracked_cache_invalidate_path(istate, path);2763}27642765/* Update gitfile and core.worktree setting to connect work tree and git dir */2766void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)2767{2768 struct strbuf gitfile_sb = STRBUF_INIT;2769 struct strbuf cfg_sb = STRBUF_INIT;2770 struct strbuf rel_path = STRBUF_INIT;2771 char *git_dir, *work_tree;27722773 /* Prepare .git file */2774 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);2775 if (safe_create_leading_directories_const(gitfile_sb.buf))2776 die(_("could not create directories for %s"), gitfile_sb.buf);27772778 /* Prepare config file */2779 strbuf_addf(&cfg_sb, "%s/config", git_dir_);2780 if (safe_create_leading_directories_const(cfg_sb.buf))2781 die(_("could not create directories for %s"), cfg_sb.buf);27822783 git_dir = real_pathdup(git_dir_, 1);2784 work_tree = real_pathdup(work_tree_, 1);27852786 /* Write .git file */2787 write_file(gitfile_sb.buf, "gitdir: %s",2788 relative_path(git_dir, work_tree, &rel_path));2789 /* Update core.worktree setting */2790 git_config_set_in_file(cfg_sb.buf, "core.worktree",2791 relative_path(work_tree, git_dir, &rel_path));27922793 strbuf_release(&gitfile_sb);2794 strbuf_release(&cfg_sb);2795 strbuf_release(&rel_path);2796 free(work_tree);2797 free(git_dir);2798}27992800/*2801 * Migrate the git directory of the given path from old_git_dir to new_git_dir.2802 */2803void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)2804{2805 if (rename(old_git_dir, new_git_dir) < 0)2806 die_errno(_("could not migrate git directory from '%s' to '%s'"),2807 old_git_dir, new_git_dir);28082809 connect_work_tree_and_git_dir(path, new_git_dir);2810}