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 "config.h" 13#include "dir.h" 14#include "attr.h" 15#include "refs.h" 16#include "wildmatch.h" 17#include "pathspec.h" 18#include "utf8.h" 19#include "varint.h" 20#include "ewah/ewok.h" 21#include "fsmonitor.h" 22 23/* 24 * Tells read_directory_recursive how a file or directory should be treated. 25 * Values are ordered by significance, e.g. if a directory contains both 26 * excluded and untracked files, it is listed as untracked because 27 * path_untracked > path_excluded. 28 */ 29enum path_treatment { 30 path_none = 0, 31 path_recurse, 32 path_excluded, 33 path_untracked 34}; 35 36/* 37 * Support data structure for our opendir/readdir/closedir wrappers 38 */ 39struct cached_dir { 40 DIR *fdir; 41 struct untracked_cache_dir *untracked; 42 int nr_files; 43 int nr_dirs; 44 45 struct dirent *de; 46 const char *file; 47 struct untracked_cache_dir *ucd; 48}; 49 50static enum path_treatment read_directory_recursive(struct dir_struct *dir, 51 struct index_state *istate, const char *path, int len, 52 struct untracked_cache_dir *untracked, 53 int check_only, int stop_at_first_file, const struct pathspec *pathspec); 54static int get_dtype(struct dirent *de, struct index_state *istate, 55 const char *path, int len); 56 57int count_slashes(const char *s) 58{ 59 int cnt = 0; 60 while (*s) 61 if (*s++ == '/') 62 cnt++; 63 return cnt; 64} 65 66int fspathcmp(const char *a, const char *b) 67{ 68 return ignore_case ? strcasecmp(a, b) : strcmp(a, b); 69} 70 71int fspathncmp(const char *a, const char *b, size_t count) 72{ 73 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); 74} 75 76int git_fnmatch(const struct pathspec_item *item, 77 const char *pattern, const char *string, 78 int prefix) 79{ 80 if (prefix > 0) { 81 if (ps_strncmp(item, pattern, string, prefix)) 82 return WM_NOMATCH; 83 pattern += prefix; 84 string += prefix; 85 } 86 if (item->flags & PATHSPEC_ONESTAR) { 87 int pattern_len = strlen(++pattern); 88 int string_len = strlen(string); 89 return string_len < pattern_len || 90 ps_strcmp(item, pattern, 91 string + string_len - pattern_len); 92 } 93 if (item->magic & PATHSPEC_GLOB) 94 return wildmatch(pattern, string, 95 WM_PATHNAME | 96 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0)); 97 else 98 /* wildmatch has not learned no FNM_PATHNAME mode yet */ 99 return wildmatch(pattern, string, 100 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0); 101} 102 103static int fnmatch_icase_mem(const char *pattern, int patternlen, 104 const char *string, int stringlen, 105 int flags) 106{ 107 int match_status; 108 struct strbuf pat_buf = STRBUF_INIT; 109 struct strbuf str_buf = STRBUF_INIT; 110 const char *use_pat = pattern; 111 const char *use_str = string; 112 113 if (pattern[patternlen]) { 114 strbuf_add(&pat_buf, pattern, patternlen); 115 use_pat = pat_buf.buf; 116 } 117 if (string[stringlen]) { 118 strbuf_add(&str_buf, string, stringlen); 119 use_str = str_buf.buf; 120 } 121 122 if (ignore_case) 123 flags |= WM_CASEFOLD; 124 match_status = wildmatch(use_pat, use_str, flags); 125 126 strbuf_release(&pat_buf); 127 strbuf_release(&str_buf); 128 129 return match_status; 130} 131 132static size_t common_prefix_len(const struct pathspec *pathspec) 133{ 134 int n; 135 size_t max = 0; 136 137 /* 138 * ":(icase)path" is treated as a pathspec full of 139 * wildcard. In other words, only prefix is considered common 140 * prefix. If the pathspec is abc/foo abc/bar, running in 141 * subdir xyz, the common prefix is still xyz, not xuz/abc as 142 * in non-:(icase). 143 */ 144 GUARD_PATHSPEC(pathspec, 145 PATHSPEC_FROMTOP | 146 PATHSPEC_MAXDEPTH | 147 PATHSPEC_LITERAL | 148 PATHSPEC_GLOB | 149 PATHSPEC_ICASE | 150 PATHSPEC_EXCLUDE | 151 PATHSPEC_ATTR); 152 153 for (n = 0; n < pathspec->nr; n++) { 154 size_t i = 0, len = 0, item_len; 155 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE) 156 continue; 157 if (pathspec->items[n].magic & PATHSPEC_ICASE) 158 item_len = pathspec->items[n].prefix; 159 else 160 item_len = pathspec->items[n].nowildcard_len; 161 while (i < item_len && (n == 0 || i < max)) { 162 char c = pathspec->items[n].match[i]; 163 if (c != pathspec->items[0].match[i]) 164 break; 165 if (c == '/') 166 len = i + 1; 167 i++; 168 } 169 if (n == 0 || len < max) { 170 max = len; 171 if (!max) 172 break; 173 } 174 } 175 return max; 176} 177 178/* 179 * Returns a copy of the longest leading path common among all 180 * pathspecs. 181 */ 182char *common_prefix(const struct pathspec *pathspec) 183{ 184 unsigned long len = common_prefix_len(pathspec); 185 186 return len ? xmemdupz(pathspec->items[0].match, len) : NULL; 187} 188 189int fill_directory(struct dir_struct *dir, 190 struct index_state *istate, 191 const struct pathspec *pathspec) 192{ 193 const char *prefix; 194 size_t prefix_len; 195 196 /* 197 * Calculate common prefix for the pathspec, and 198 * use that to optimize the directory walk 199 */ 200 prefix_len = common_prefix_len(pathspec); 201 prefix = prefix_len ? pathspec->items[0].match : ""; 202 203 /* Read the directory and prune it */ 204 read_directory(dir, istate, prefix, prefix_len, pathspec); 205 206 return prefix_len; 207} 208 209int within_depth(const char *name, int namelen, 210 int depth, int max_depth) 211{ 212 const char *cp = name, *cpe = name + namelen; 213 214 while (cp < cpe) { 215 if (*cp++ != '/') 216 continue; 217 depth++; 218 if (depth > max_depth) 219 return 0; 220 } 221 return 1; 222} 223 224#define DO_MATCH_EXCLUDE (1<<0) 225#define DO_MATCH_DIRECTORY (1<<1) 226#define DO_MATCH_SUBMODULE (1<<2) 227 228static int match_attrs(const char *name, int namelen, 229 const struct pathspec_item *item) 230{ 231 int i; 232 233 git_check_attr(name, item->attr_check); 234 for (i = 0; i < item->attr_match_nr; i++) { 235 const char *value; 236 int matched; 237 enum attr_match_mode match_mode; 238 239 value = item->attr_check->items[i].value; 240 match_mode = item->attr_match[i].match_mode; 241 242 if (ATTR_TRUE(value)) 243 matched = (match_mode == MATCH_SET); 244 else if (ATTR_FALSE(value)) 245 matched = (match_mode == MATCH_UNSET); 246 else if (ATTR_UNSET(value)) 247 matched = (match_mode == MATCH_UNSPECIFIED); 248 else 249 matched = (match_mode == MATCH_VALUE && 250 !strcmp(item->attr_match[i].value, value)); 251 if (!matched) 252 return 0; 253 } 254 255 return 1; 256} 257 258/* 259 * Does 'match' match the given name? 260 * A match is found if 261 * 262 * (1) the 'match' string is leading directory of 'name', or 263 * (2) the 'match' string is a wildcard and matches 'name', or 264 * (3) the 'match' string is exactly the same as 'name'. 265 * 266 * and the return value tells which case it was. 267 * 268 * It returns 0 when there is no match. 269 */ 270static int match_pathspec_item(const struct pathspec_item *item, int prefix, 271 const char *name, int namelen, unsigned flags) 272{ 273 /* name/namelen has prefix cut off by caller */ 274 const char *match = item->match + prefix; 275 int matchlen = item->len - prefix; 276 277 /* 278 * The normal call pattern is: 279 * 1. prefix = common_prefix_len(ps); 280 * 2. prune something, or fill_directory 281 * 3. match_pathspec() 282 * 283 * 'prefix' at #1 may be shorter than the command's prefix and 284 * it's ok for #2 to match extra files. Those extras will be 285 * trimmed at #3. 286 * 287 * Suppose the pathspec is 'foo' and '../bar' running from 288 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 289 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 290 * user does not want XYZ/foo, only the "foo" part should be 291 * case-insensitive. We need to filter out XYZ/foo here. In 292 * other words, we do not trust the caller on comparing the 293 * prefix part when :(icase) is involved. We do exact 294 * comparison ourselves. 295 * 296 * Normally the caller (common_prefix_len() in fact) does 297 * _exact_ matching on name[-prefix+1..-1] and we do not need 298 * to check that part. Be defensive and check it anyway, in 299 * case common_prefix_len is changed, or a new caller is 300 * introduced that does not use common_prefix_len. 301 * 302 * If the penalty turns out too high when prefix is really 303 * long, maybe change it to 304 * strncmp(match, name, item->prefix - prefix) 305 */ 306 if (item->prefix && (item->magic & PATHSPEC_ICASE) && 307 strncmp(item->match, name - prefix, item->prefix)) 308 return 0; 309 310 if (item->attr_match_nr && !match_attrs(name, namelen, item)) 311 return 0; 312 313 /* If the match was just the prefix, we matched */ 314 if (!*match) 315 return MATCHED_RECURSIVELY; 316 317 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 318 if (matchlen == namelen) 319 return MATCHED_EXACTLY; 320 321 if (match[matchlen-1] == '/' || name[matchlen] == '/') 322 return MATCHED_RECURSIVELY; 323 } else if ((flags & DO_MATCH_DIRECTORY) && 324 match[matchlen - 1] == '/' && 325 namelen == matchlen - 1 && 326 !ps_strncmp(item, match, name, namelen)) 327 return MATCHED_EXACTLY; 328 329 if (item->nowildcard_len < item->len && 330 !git_fnmatch(item, match, name, 331 item->nowildcard_len - prefix)) 332 return MATCHED_FNMATCH; 333 334 /* Perform checks to see if "name" is a super set of the pathspec */ 335 if (flags & DO_MATCH_SUBMODULE) { 336 /* name is a literal prefix of the pathspec */ 337 if ((namelen < matchlen) && 338 (match[namelen] == '/') && 339 !ps_strncmp(item, match, name, namelen)) 340 return MATCHED_RECURSIVELY; 341 342 /* name" doesn't match up to the first wild character */ 343 if (item->nowildcard_len < item->len && 344 ps_strncmp(item, match, name, 345 item->nowildcard_len - prefix)) 346 return 0; 347 348 /* 349 * Here is where we would perform a wildmatch to check if 350 * "name" can be matched as a directory (or a prefix) against 351 * the pathspec. Since wildmatch doesn't have this capability 352 * at the present we have to punt and say that it is a match, 353 * potentially returning a false positive 354 * The submodules themselves will be able to perform more 355 * accurate matching to determine if the pathspec matches. 356 */ 357 return MATCHED_RECURSIVELY; 358 } 359 360 return 0; 361} 362 363/* 364 * Given a name and a list of pathspecs, returns the nature of the 365 * closest (i.e. most specific) match of the name to any of the 366 * pathspecs. 367 * 368 * The caller typically calls this multiple times with the same 369 * pathspec and seen[] array but with different name/namelen 370 * (e.g. entries from the index) and is interested in seeing if and 371 * how each pathspec matches all the names it calls this function 372 * with. A mark is left in the seen[] array for each pathspec element 373 * indicating the closest type of match that element achieved, so if 374 * seen[n] remains zero after multiple invocations, that means the nth 375 * pathspec did not match any names, which could indicate that the 376 * user mistyped the nth pathspec. 377 */ 378static int do_match_pathspec(const struct pathspec *ps, 379 const char *name, int namelen, 380 int prefix, char *seen, 381 unsigned flags) 382{ 383 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE; 384 385 GUARD_PATHSPEC(ps, 386 PATHSPEC_FROMTOP | 387 PATHSPEC_MAXDEPTH | 388 PATHSPEC_LITERAL | 389 PATHSPEC_GLOB | 390 PATHSPEC_ICASE | 391 PATHSPEC_EXCLUDE | 392 PATHSPEC_ATTR); 393 394 if (!ps->nr) { 395 if (!ps->recursive || 396 !(ps->magic & PATHSPEC_MAXDEPTH) || 397 ps->max_depth == -1) 398 return MATCHED_RECURSIVELY; 399 400 if (within_depth(name, namelen, 0, ps->max_depth)) 401 return MATCHED_EXACTLY; 402 else 403 return 0; 404 } 405 406 name += prefix; 407 namelen -= prefix; 408 409 for (i = ps->nr - 1; i >= 0; i--) { 410 int how; 411 412 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 413 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 414 continue; 415 416 if (seen && seen[i] == MATCHED_EXACTLY) 417 continue; 418 /* 419 * Make exclude patterns optional and never report 420 * "pathspec ':(exclude)foo' matches no files" 421 */ 422 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 423 seen[i] = MATCHED_FNMATCH; 424 how = match_pathspec_item(ps->items+i, prefix, name, 425 namelen, flags); 426 if (ps->recursive && 427 (ps->magic & PATHSPEC_MAXDEPTH) && 428 ps->max_depth != -1 && 429 how && how != MATCHED_FNMATCH) { 430 int len = ps->items[i].len; 431 if (name[len] == '/') 432 len++; 433 if (within_depth(name+len, namelen-len, 0, ps->max_depth)) 434 how = MATCHED_EXACTLY; 435 else 436 how = 0; 437 } 438 if (how) { 439 if (retval < how) 440 retval = how; 441 if (seen && seen[i] < how) 442 seen[i] = how; 443 } 444 } 445 return retval; 446} 447 448int match_pathspec(const struct pathspec *ps, 449 const char *name, int namelen, 450 int prefix, char *seen, int is_dir) 451{ 452 int positive, negative; 453 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0; 454 positive = do_match_pathspec(ps, name, namelen, 455 prefix, seen, flags); 456 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 457 return positive; 458 negative = do_match_pathspec(ps, name, namelen, 459 prefix, seen, 460 flags | DO_MATCH_EXCLUDE); 461 return negative ? 0 : positive; 462} 463 464/** 465 * Check if a submodule is a superset of the pathspec 466 */ 467int submodule_path_match(const struct pathspec *ps, 468 const char *submodule_name, 469 char *seen) 470{ 471 int matched = do_match_pathspec(ps, submodule_name, 472 strlen(submodule_name), 473 0, seen, 474 DO_MATCH_DIRECTORY | 475 DO_MATCH_SUBMODULE); 476 return matched; 477} 478 479int report_path_error(const char *ps_matched, 480 const struct pathspec *pathspec, 481 const char *prefix) 482{ 483 /* 484 * Make sure all pathspec matched; otherwise it is an error. 485 */ 486 int num, errors = 0; 487 for (num = 0; num < pathspec->nr; num++) { 488 int other, found_dup; 489 490 if (ps_matched[num]) 491 continue; 492 /* 493 * The caller might have fed identical pathspec 494 * twice. Do not barf on such a mistake. 495 * FIXME: parse_pathspec should have eliminated 496 * duplicate pathspec. 497 */ 498 for (found_dup = other = 0; 499 !found_dup && other < pathspec->nr; 500 other++) { 501 if (other == num || !ps_matched[other]) 502 continue; 503 if (!strcmp(pathspec->items[other].original, 504 pathspec->items[num].original)) 505 /* 506 * Ok, we have a match already. 507 */ 508 found_dup = 1; 509 } 510 if (found_dup) 511 continue; 512 513 error("pathspec '%s' did not match any file(s) known to git.", 514 pathspec->items[num].original); 515 errors++; 516 } 517 return errors; 518} 519 520/* 521 * Return the length of the "simple" part of a path match limiter. 522 */ 523int simple_length(const char *match) 524{ 525 int len = -1; 526 527 for (;;) { 528 unsigned char c = *match++; 529 len++; 530 if (c == '\0' || is_glob_special(c)) 531 return len; 532 } 533} 534 535int no_wildcard(const char *string) 536{ 537 return string[simple_length(string)] == '\0'; 538} 539 540void parse_exclude_pattern(const char **pattern, 541 int *patternlen, 542 unsigned *flags, 543 int *nowildcardlen) 544{ 545 const char *p = *pattern; 546 size_t i, len; 547 548 *flags = 0; 549 if (*p == '!') { 550 *flags |= EXC_FLAG_NEGATIVE; 551 p++; 552 } 553 len = strlen(p); 554 if (len && p[len - 1] == '/') { 555 len--; 556 *flags |= EXC_FLAG_MUSTBEDIR; 557 } 558 for (i = 0; i < len; i++) { 559 if (p[i] == '/') 560 break; 561 } 562 if (i == len) 563 *flags |= EXC_FLAG_NODIR; 564 *nowildcardlen = simple_length(p); 565 /* 566 * we should have excluded the trailing slash from 'p' too, 567 * but that's one more allocation. Instead just make sure 568 * nowildcardlen does not exceed real patternlen 569 */ 570 if (*nowildcardlen > len) 571 *nowildcardlen = len; 572 if (*p == '*' && no_wildcard(p + 1)) 573 *flags |= EXC_FLAG_ENDSWITH; 574 *pattern = p; 575 *patternlen = len; 576} 577 578void add_exclude(const char *string, const char *base, 579 int baselen, struct exclude_list *el, int srcpos) 580{ 581 struct exclude *x; 582 int patternlen; 583 unsigned flags; 584 int nowildcardlen; 585 586 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 587 if (flags & EXC_FLAG_MUSTBEDIR) { 588 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen); 589 } else { 590 x = xmalloc(sizeof(*x)); 591 x->pattern = string; 592 } 593 x->patternlen = patternlen; 594 x->nowildcardlen = nowildcardlen; 595 x->base = base; 596 x->baselen = baselen; 597 x->flags = flags; 598 x->srcpos = srcpos; 599 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc); 600 el->excludes[el->nr++] = x; 601 x->el = el; 602} 603 604static void *read_skip_worktree_file_from_index(const struct index_state *istate, 605 const char *path, size_t *size, 606 struct sha1_stat *sha1_stat) 607{ 608 int pos, len; 609 unsigned long sz; 610 enum object_type type; 611 void *data; 612 613 len = strlen(path); 614 pos = index_name_pos(istate, path, len); 615 if (pos < 0) 616 return NULL; 617 if (!ce_skip_worktree(istate->cache[pos])) 618 return NULL; 619 data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz); 620 if (!data || type != OBJ_BLOB) { 621 free(data); 622 return NULL; 623 } 624 *size = xsize_t(sz); 625 if (sha1_stat) { 626 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat)); 627 hashcpy(sha1_stat->sha1, istate->cache[pos]->oid.hash); 628 } 629 return data; 630} 631 632/* 633 * Frees memory within el which was allocated for exclude patterns and 634 * the file buffer. Does not free el itself. 635 */ 636void clear_exclude_list(struct exclude_list *el) 637{ 638 int i; 639 640 for (i = 0; i < el->nr; i++) 641 free(el->excludes[i]); 642 free(el->excludes); 643 free(el->filebuf); 644 645 memset(el, 0, sizeof(*el)); 646} 647 648static void trim_trailing_spaces(char *buf) 649{ 650 char *p, *last_space = NULL; 651 652 for (p = buf; *p; p++) 653 switch (*p) { 654 case ' ': 655 if (!last_space) 656 last_space = p; 657 break; 658 case '\\': 659 p++; 660 if (!*p) 661 return; 662 /* fallthrough */ 663 default: 664 last_space = NULL; 665 } 666 667 if (last_space) 668 *last_space = '\0'; 669} 670 671/* 672 * Given a subdirectory name and "dir" of the current directory, 673 * search the subdir in "dir" and return it, or create a new one if it 674 * does not exist in "dir". 675 * 676 * If "name" has the trailing slash, it'll be excluded in the search. 677 */ 678static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 679 struct untracked_cache_dir *dir, 680 const char *name, int len) 681{ 682 int first, last; 683 struct untracked_cache_dir *d; 684 if (!dir) 685 return NULL; 686 if (len && name[len - 1] == '/') 687 len--; 688 first = 0; 689 last = dir->dirs_nr; 690 while (last > first) { 691 int cmp, next = (last + first) >> 1; 692 d = dir->dirs[next]; 693 cmp = strncmp(name, d->name, len); 694 if (!cmp && strlen(d->name) > len) 695 cmp = -1; 696 if (!cmp) 697 return d; 698 if (cmp < 0) { 699 last = next; 700 continue; 701 } 702 first = next+1; 703 } 704 705 uc->dir_created++; 706 FLEX_ALLOC_MEM(d, name, name, len); 707 708 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc); 709 memmove(dir->dirs + first + 1, dir->dirs + first, 710 (dir->dirs_nr - first) * sizeof(*dir->dirs)); 711 dir->dirs_nr++; 712 dir->dirs[first] = d; 713 return d; 714} 715 716static void do_invalidate_gitignore(struct untracked_cache_dir *dir) 717{ 718 int i; 719 dir->valid = 0; 720 dir->untracked_nr = 0; 721 for (i = 0; i < dir->dirs_nr; i++) 722 do_invalidate_gitignore(dir->dirs[i]); 723} 724 725static void invalidate_gitignore(struct untracked_cache *uc, 726 struct untracked_cache_dir *dir) 727{ 728 uc->gitignore_invalidated++; 729 do_invalidate_gitignore(dir); 730} 731 732static void invalidate_directory(struct untracked_cache *uc, 733 struct untracked_cache_dir *dir) 734{ 735 int i; 736 737 /* 738 * Invalidation increment here is just roughly correct. If 739 * untracked_nr or any of dirs[].recurse is non-zero, we 740 * should increment dir_invalidated too. But that's more 741 * expensive to do. 742 */ 743 if (dir->valid) 744 uc->dir_invalidated++; 745 746 dir->valid = 0; 747 dir->untracked_nr = 0; 748 for (i = 0; i < dir->dirs_nr; i++) 749 dir->dirs[i]->recurse = 0; 750} 751 752/* 753 * Given a file with name "fname", read it (either from disk, or from 754 * an index if 'istate' is non-null), parse it and store the 755 * exclude rules in "el". 756 * 757 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 758 * stat data from disk (only valid if add_excludes returns zero). If 759 * ss_valid is non-zero, "ss" must contain good value as input. 760 */ 761static int add_excludes(const char *fname, const char *base, int baselen, 762 struct exclude_list *el, 763 struct index_state *istate, 764 struct sha1_stat *sha1_stat) 765{ 766 struct stat st; 767 int fd, i, lineno = 1; 768 size_t size = 0; 769 char *buf, *entry; 770 771 fd = open(fname, O_RDONLY); 772 if (fd < 0 || fstat(fd, &st) < 0) { 773 if (fd < 0) 774 warn_on_fopen_errors(fname); 775 else 776 close(fd); 777 if (!istate || 778 (buf = read_skip_worktree_file_from_index(istate, fname, &size, sha1_stat)) == NULL) 779 return -1; 780 if (size == 0) { 781 free(buf); 782 return 0; 783 } 784 if (buf[size-1] != '\n') { 785 buf = xrealloc(buf, st_add(size, 1)); 786 buf[size++] = '\n'; 787 } 788 } else { 789 size = xsize_t(st.st_size); 790 if (size == 0) { 791 if (sha1_stat) { 792 fill_stat_data(&sha1_stat->stat, &st); 793 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); 794 sha1_stat->valid = 1; 795 } 796 close(fd); 797 return 0; 798 } 799 buf = xmallocz(size); 800 if (read_in_full(fd, buf, size) != size) { 801 free(buf); 802 close(fd); 803 return -1; 804 } 805 buf[size++] = '\n'; 806 close(fd); 807 if (sha1_stat) { 808 int pos; 809 if (sha1_stat->valid && 810 !match_stat_data_racy(istate, &sha1_stat->stat, &st)) 811 ; /* no content change, ss->sha1 still good */ 812 else if (istate && 813 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 && 814 !ce_stage(istate->cache[pos]) && 815 ce_uptodate(istate->cache[pos]) && 816 !would_convert_to_git(istate, fname)) 817 hashcpy(sha1_stat->sha1, 818 istate->cache[pos]->oid.hash); 819 else 820 hash_sha1_file(buf, size, "blob", sha1_stat->sha1); 821 fill_stat_data(&sha1_stat->stat, &st); 822 sha1_stat->valid = 1; 823 } 824 } 825 826 el->filebuf = buf; 827 828 if (skip_utf8_bom(&buf, size)) 829 size -= buf - el->filebuf; 830 831 entry = buf; 832 833 for (i = 0; i < size; i++) { 834 if (buf[i] == '\n') { 835 if (entry != buf + i && entry[0] != '#') { 836 buf[i - (i && buf[i-1] == '\r')] = 0; 837 trim_trailing_spaces(entry); 838 add_exclude(entry, base, baselen, el, lineno); 839 } 840 lineno++; 841 entry = buf + i + 1; 842 } 843 } 844 return 0; 845} 846 847int add_excludes_from_file_to_list(const char *fname, const char *base, 848 int baselen, struct exclude_list *el, 849 struct index_state *istate) 850{ 851 return add_excludes(fname, base, baselen, el, istate, NULL); 852} 853 854struct exclude_list *add_exclude_list(struct dir_struct *dir, 855 int group_type, const char *src) 856{ 857 struct exclude_list *el; 858 struct exclude_list_group *group; 859 860 group = &dir->exclude_list_group[group_type]; 861 ALLOC_GROW(group->el, group->nr + 1, group->alloc); 862 el = &group->el[group->nr++]; 863 memset(el, 0, sizeof(*el)); 864 el->src = src; 865 return el; 866} 867 868/* 869 * Used to set up core.excludesfile and .git/info/exclude lists. 870 */ 871static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname, 872 struct sha1_stat *sha1_stat) 873{ 874 struct exclude_list *el; 875 /* 876 * catch setup_standard_excludes() that's called before 877 * dir->untracked is assigned. That function behaves 878 * differently when dir->untracked is non-NULL. 879 */ 880 if (!dir->untracked) 881 dir->unmanaged_exclude_files++; 882 el = add_exclude_list(dir, EXC_FILE, fname); 883 if (add_excludes(fname, "", 0, el, NULL, sha1_stat) < 0) 884 die("cannot use %s as an exclude file", fname); 885} 886 887void add_excludes_from_file(struct dir_struct *dir, const char *fname) 888{ 889 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ 890 add_excludes_from_file_1(dir, fname, NULL); 891} 892 893int match_basename(const char *basename, int basenamelen, 894 const char *pattern, int prefix, int patternlen, 895 unsigned flags) 896{ 897 if (prefix == patternlen) { 898 if (patternlen == basenamelen && 899 !fspathncmp(pattern, basename, basenamelen)) 900 return 1; 901 } else if (flags & EXC_FLAG_ENDSWITH) { 902 /* "*literal" matching against "fooliteral" */ 903 if (patternlen - 1 <= basenamelen && 904 !fspathncmp(pattern + 1, 905 basename + basenamelen - (patternlen - 1), 906 patternlen - 1)) 907 return 1; 908 } else { 909 if (fnmatch_icase_mem(pattern, patternlen, 910 basename, basenamelen, 911 0) == 0) 912 return 1; 913 } 914 return 0; 915} 916 917int match_pathname(const char *pathname, int pathlen, 918 const char *base, int baselen, 919 const char *pattern, int prefix, int patternlen, 920 unsigned flags) 921{ 922 const char *name; 923 int namelen; 924 925 /* 926 * match with FNM_PATHNAME; the pattern has base implicitly 927 * in front of it. 928 */ 929 if (*pattern == '/') { 930 pattern++; 931 patternlen--; 932 prefix--; 933 } 934 935 /* 936 * baselen does not count the trailing slash. base[] may or 937 * may not end with a trailing slash though. 938 */ 939 if (pathlen < baselen + 1 || 940 (baselen && pathname[baselen] != '/') || 941 fspathncmp(pathname, base, baselen)) 942 return 0; 943 944 namelen = baselen ? pathlen - baselen - 1 : pathlen; 945 name = pathname + pathlen - namelen; 946 947 if (prefix) { 948 /* 949 * if the non-wildcard part is longer than the 950 * remaining pathname, surely it cannot match. 951 */ 952 if (prefix > namelen) 953 return 0; 954 955 if (fspathncmp(pattern, name, prefix)) 956 return 0; 957 pattern += prefix; 958 patternlen -= prefix; 959 name += prefix; 960 namelen -= prefix; 961 962 /* 963 * If the whole pattern did not have a wildcard, 964 * then our prefix match is all we need; we 965 * do not need to call fnmatch at all. 966 */ 967 if (!patternlen && !namelen) 968 return 1; 969 } 970 971 return fnmatch_icase_mem(pattern, patternlen, 972 name, namelen, 973 WM_PATHNAME) == 0; 974} 975 976/* 977 * Scan the given exclude list in reverse to see whether pathname 978 * should be ignored. The first match (i.e. the last on the list), if 979 * any, determines the fate. Returns the exclude_list element which 980 * matched, or NULL for undecided. 981 */ 982static struct exclude *last_exclude_matching_from_list(const char *pathname, 983 int pathlen, 984 const char *basename, 985 int *dtype, 986 struct exclude_list *el, 987 struct index_state *istate) 988{ 989 struct exclude *exc = NULL; /* undecided */ 990 int i; 991 992 if (!el->nr) 993 return NULL; /* undefined */ 994 995 for (i = el->nr - 1; 0 <= i; i--) { 996 struct exclude *x = el->excludes[i]; 997 const char *exclude = x->pattern; 998 int prefix = x->nowildcardlen; 9991000 if (x->flags & EXC_FLAG_MUSTBEDIR) {1001 if (*dtype == DT_UNKNOWN)1002 *dtype = get_dtype(NULL, istate, pathname, pathlen);1003 if (*dtype != DT_DIR)1004 continue;1005 }10061007 if (x->flags & EXC_FLAG_NODIR) {1008 if (match_basename(basename,1009 pathlen - (basename - pathname),1010 exclude, prefix, x->patternlen,1011 x->flags)) {1012 exc = x;1013 break;1014 }1015 continue;1016 }10171018 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');1019 if (match_pathname(pathname, pathlen,1020 x->base, x->baselen ? x->baselen - 1 : 0,1021 exclude, prefix, x->patternlen, x->flags)) {1022 exc = x;1023 break;1024 }1025 }1026 return exc;1027}10281029/*1030 * Scan the list and let the last match determine the fate.1031 * Return 1 for exclude, 0 for include and -1 for undecided.1032 */1033int is_excluded_from_list(const char *pathname,1034 int pathlen, const char *basename, int *dtype,1035 struct exclude_list *el, struct index_state *istate)1036{1037 struct exclude *exclude;1038 exclude = last_exclude_matching_from_list(pathname, pathlen, basename,1039 dtype, el, istate);1040 if (exclude)1041 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1042 return -1; /* undecided */1043}10441045static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,1046 struct index_state *istate,1047 const char *pathname, int pathlen, const char *basename,1048 int *dtype_p)1049{1050 int i, j;1051 struct exclude_list_group *group;1052 struct exclude *exclude;1053 for (i = EXC_CMDL; i <= EXC_FILE; i++) {1054 group = &dir->exclude_list_group[i];1055 for (j = group->nr - 1; j >= 0; j--) {1056 exclude = last_exclude_matching_from_list(1057 pathname, pathlen, basename, dtype_p,1058 &group->el[j], istate);1059 if (exclude)1060 return exclude;1061 }1062 }1063 return NULL;1064}10651066/*1067 * Loads the per-directory exclude list for the substring of base1068 * which has a char length of baselen.1069 */1070static void prep_exclude(struct dir_struct *dir,1071 struct index_state *istate,1072 const char *base, int baselen)1073{1074 struct exclude_list_group *group;1075 struct exclude_list *el;1076 struct exclude_stack *stk = NULL;1077 struct untracked_cache_dir *untracked;1078 int current;10791080 group = &dir->exclude_list_group[EXC_DIRS];10811082 /*1083 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1084 * which originate from directories not in the prefix of the1085 * path being checked.1086 */1087 while ((stk = dir->exclude_stack) != NULL) {1088 if (stk->baselen <= baselen &&1089 !strncmp(dir->basebuf.buf, base, stk->baselen))1090 break;1091 el = &group->el[dir->exclude_stack->exclude_ix];1092 dir->exclude_stack = stk->prev;1093 dir->exclude = NULL;1094 free((char *)el->src); /* see strbuf_detach() below */1095 clear_exclude_list(el);1096 free(stk);1097 group->nr--;1098 }10991100 /* Skip traversing into sub directories if the parent is excluded */1101 if (dir->exclude)1102 return;11031104 /*1105 * Lazy initialization. All call sites currently just1106 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1107 * them seems lots of work for little benefit.1108 */1109 if (!dir->basebuf.buf)1110 strbuf_init(&dir->basebuf, PATH_MAX);11111112 /* Read from the parent directories and push them down. */1113 current = stk ? stk->baselen : -1;1114 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);1115 if (dir->untracked)1116 untracked = stk ? stk->ucd : dir->untracked->root;1117 else1118 untracked = NULL;11191120 while (current < baselen) {1121 const char *cp;1122 struct sha1_stat sha1_stat;11231124 stk = xcalloc(1, sizeof(*stk));1125 if (current < 0) {1126 cp = base;1127 current = 0;1128 } else {1129 cp = strchr(base + current + 1, '/');1130 if (!cp)1131 die("oops in prep_exclude");1132 cp++;1133 untracked =1134 lookup_untracked(dir->untracked, untracked,1135 base + current,1136 cp - base - current);1137 }1138 stk->prev = dir->exclude_stack;1139 stk->baselen = cp - base;1140 stk->exclude_ix = group->nr;1141 stk->ucd = untracked;1142 el = add_exclude_list(dir, EXC_DIRS, NULL);1143 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1144 assert(stk->baselen == dir->basebuf.len);11451146 /* Abort if the directory is excluded */1147 if (stk->baselen) {1148 int dt = DT_DIR;1149 dir->basebuf.buf[stk->baselen - 1] = 0;1150 dir->exclude = last_exclude_matching_from_lists(dir,1151 istate,1152 dir->basebuf.buf, stk->baselen - 1,1153 dir->basebuf.buf + current, &dt);1154 dir->basebuf.buf[stk->baselen - 1] = '/';1155 if (dir->exclude &&1156 dir->exclude->flags & EXC_FLAG_NEGATIVE)1157 dir->exclude = NULL;1158 if (dir->exclude) {1159 dir->exclude_stack = stk;1160 return;1161 }1162 }11631164 /* Try to read per-directory file */1165 hashclr(sha1_stat.sha1);1166 sha1_stat.valid = 0;1167 if (dir->exclude_per_dir &&1168 /*1169 * If we know that no files have been added in1170 * this directory (i.e. valid_cached_dir() has1171 * been executed and set untracked->valid) ..1172 */1173 (!untracked || !untracked->valid ||1174 /*1175 * .. and .gitignore does not exist before1176 * (i.e. null exclude_sha1). Then we can skip1177 * loading .gitignore, which would result in1178 * ENOENT anyway.1179 */1180 !is_null_sha1(untracked->exclude_sha1))) {1181 /*1182 * dir->basebuf gets reused by the traversal, but we1183 * need fname to remain unchanged to ensure the src1184 * member of each struct exclude correctly1185 * back-references its source file. Other invocations1186 * of add_exclude_list provide stable strings, so we1187 * strbuf_detach() and free() here in the caller.1188 */1189 struct strbuf sb = STRBUF_INIT;1190 strbuf_addbuf(&sb, &dir->basebuf);1191 strbuf_addstr(&sb, dir->exclude_per_dir);1192 el->src = strbuf_detach(&sb, NULL);1193 add_excludes(el->src, el->src, stk->baselen, el, istate,1194 untracked ? &sha1_stat : NULL);1195 }1196 /*1197 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1198 * will first be called in valid_cached_dir() then maybe many1199 * times more in last_exclude_matching(). When the cache is1200 * used, last_exclude_matching() will not be called and1201 * reading .gitignore content will be a waste.1202 *1203 * So when it's called by valid_cached_dir() and we can get1204 * .gitignore SHA-1 from the index (i.e. .gitignore is not1205 * modified on work tree), we could delay reading the1206 * .gitignore content until we absolutely need it in1207 * last_exclude_matching(). Be careful about ignore rule1208 * order, though, if you do that.1209 */1210 if (untracked &&1211 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {1212 invalidate_gitignore(dir->untracked, untracked);1213 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);1214 }1215 dir->exclude_stack = stk;1216 current = stk->baselen;1217 }1218 strbuf_setlen(&dir->basebuf, baselen);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 the exclude_list element which matched, or NULL for1225 * undecided.1226 */1227struct exclude *last_exclude_matching(struct dir_struct *dir,1228 struct index_state *istate,1229 const char *pathname,1230 int *dtype_p)1231{1232 int pathlen = strlen(pathname);1233 const char *basename = strrchr(pathname, '/');1234 basename = (basename) ? basename+1 : pathname;12351236 prep_exclude(dir, istate, pathname, basename-pathname);12371238 if (dir->exclude)1239 return dir->exclude;12401241 return last_exclude_matching_from_lists(dir, istate, pathname, pathlen,1242 basename, dtype_p);1243}12441245/*1246 * Loads the exclude lists for the directory containing pathname, then1247 * scans all exclude lists to determine whether pathname is excluded.1248 * Returns 1 if true, otherwise 0.1249 */1250int is_excluded(struct dir_struct *dir, struct index_state *istate,1251 const char *pathname, int *dtype_p)1252{1253 struct exclude *exclude =1254 last_exclude_matching(dir, istate, pathname, dtype_p);1255 if (exclude)1256 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1257 return 0;1258}12591260static struct dir_entry *dir_entry_new(const char *pathname, int len)1261{1262 struct dir_entry *ent;12631264 FLEX_ALLOC_MEM(ent, name, pathname, len);1265 ent->len = len;1266 return ent;1267}12681269static struct dir_entry *dir_add_name(struct dir_struct *dir,1270 struct index_state *istate,1271 const char *pathname, int len)1272{1273 if (index_file_exists(istate, pathname, len, ignore_case))1274 return NULL;12751276 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1277 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);1278}12791280struct dir_entry *dir_add_ignored(struct dir_struct *dir,1281 struct index_state *istate,1282 const char *pathname, int len)1283{1284 if (!index_name_is_other(istate, pathname, len))1285 return NULL;12861287 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1288 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);1289}12901291enum exist_status {1292 index_nonexistent = 0,1293 index_directory,1294 index_gitdir1295};12961297/*1298 * Do not use the alphabetically sorted index to look up1299 * the directory name; instead, use the case insensitive1300 * directory hash.1301 */1302static enum exist_status directory_exists_in_index_icase(struct index_state *istate,1303 const char *dirname, int len)1304{1305 struct cache_entry *ce;13061307 if (index_dir_exists(istate, dirname, len))1308 return index_directory;13091310 ce = index_file_exists(istate, dirname, len, ignore_case);1311 if (ce && S_ISGITLINK(ce->ce_mode))1312 return index_gitdir;13131314 return index_nonexistent;1315}13161317/*1318 * The index sorts alphabetically by entry name, which1319 * means that a gitlink sorts as '\0' at the end, while1320 * a directory (which is defined not as an entry, but as1321 * the files it contains) will sort with the '/' at the1322 * end.1323 */1324static enum exist_status directory_exists_in_index(struct index_state *istate,1325 const char *dirname, int len)1326{1327 int pos;13281329 if (ignore_case)1330 return directory_exists_in_index_icase(istate, dirname, len);13311332 pos = index_name_pos(istate, dirname, len);1333 if (pos < 0)1334 pos = -pos-1;1335 while (pos < istate->cache_nr) {1336 const struct cache_entry *ce = istate->cache[pos++];1337 unsigned char endchar;13381339 if (strncmp(ce->name, dirname, len))1340 break;1341 endchar = ce->name[len];1342 if (endchar > '/')1343 break;1344 if (endchar == '/')1345 return index_directory;1346 if (!endchar && S_ISGITLINK(ce->ce_mode))1347 return index_gitdir;1348 }1349 return index_nonexistent;1350}13511352/*1353 * When we find a directory when traversing the filesystem, we1354 * have three distinct cases:1355 *1356 * - ignore it1357 * - see it as a directory1358 * - recurse into it1359 *1360 * and which one we choose depends on a combination of existing1361 * git index contents and the flags passed into the directory1362 * traversal routine.1363 *1364 * Case 1: If we *already* have entries in the index under that1365 * directory name, we always recurse into the directory to see1366 * all the files.1367 *1368 * Case 2: If we *already* have that directory name as a gitlink,1369 * we always continue to see it as a gitlink, regardless of whether1370 * there is an actual git directory there or not (it might not1371 * be checked out as a subproject!)1372 *1373 * Case 3: if we didn't have it in the index previously, we1374 * have a few sub-cases:1375 *1376 * (a) if "show_other_directories" is true, we show it as1377 * just a directory, unless "hide_empty_directories" is1378 * also true, in which case we need to check if it contains any1379 * untracked and / or ignored files.1380 * (b) if it looks like a git directory, and we don't have1381 * 'no_gitlinks' set we treat it as a gitlink, and show it1382 * as a directory.1383 * (c) otherwise, we recurse into it.1384 */1385static enum path_treatment treat_directory(struct dir_struct *dir,1386 struct index_state *istate,1387 struct untracked_cache_dir *untracked,1388 const char *dirname, int len, int baselen, int exclude,1389 const struct pathspec *pathspec)1390{1391 /* The "len-1" is to strip the final '/' */1392 switch (directory_exists_in_index(istate, dirname, len-1)) {1393 case index_directory:1394 return path_recurse;13951396 case index_gitdir:1397 return path_none;13981399 case index_nonexistent:1400 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1401 break;1402 if (exclude &&1403 (dir->flags & DIR_SHOW_IGNORED_TOO) &&1404 (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {14051406 /*1407 * This is an excluded directory and we are1408 * showing ignored paths that match an exclude1409 * pattern. (e.g. show directory as ignored1410 * only if it matches an exclude pattern).1411 * This path will either be 'path_excluded`1412 * (if we are showing empty directories or if1413 * the directory is not empty), or will be1414 * 'path_none' (empty directory, and we are1415 * not showing empty directories).1416 */1417 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1418 return path_excluded;14191420 if (read_directory_recursive(dir, istate, dirname, len,1421 untracked, 1, 1, pathspec) == path_excluded)1422 return path_excluded;14231424 return path_none;1425 }1426 if (!(dir->flags & DIR_NO_GITLINKS)) {1427 struct object_id oid;1428 if (resolve_gitlink_ref(dirname, "HEAD", &oid) == 0)1429 return exclude ? path_excluded : path_untracked;1430 }1431 return path_recurse;1432 }14331434 /* This is the "show_other_directories" case */14351436 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1437 return exclude ? path_excluded : path_untracked;14381439 untracked = lookup_untracked(dir->untracked, untracked,1440 dirname + baselen, len - baselen);14411442 /*1443 * If this is an excluded directory, then we only need to check if1444 * the directory contains any files.1445 */1446 return read_directory_recursive(dir, istate, dirname, len,1447 untracked, 1, exclude, pathspec);1448}14491450/*1451 * This is an inexact early pruning of any recursive directory1452 * reading - if the path cannot possibly be in the pathspec,1453 * return true, and we'll skip it early.1454 */1455static int simplify_away(const char *path, int pathlen,1456 const struct pathspec *pathspec)1457{1458 int i;14591460 if (!pathspec || !pathspec->nr)1461 return 0;14621463 GUARD_PATHSPEC(pathspec,1464 PATHSPEC_FROMTOP |1465 PATHSPEC_MAXDEPTH |1466 PATHSPEC_LITERAL |1467 PATHSPEC_GLOB |1468 PATHSPEC_ICASE |1469 PATHSPEC_EXCLUDE |1470 PATHSPEC_ATTR);14711472 for (i = 0; i < pathspec->nr; i++) {1473 const struct pathspec_item *item = &pathspec->items[i];1474 int len = item->nowildcard_len;14751476 if (len > pathlen)1477 len = pathlen;1478 if (!ps_strncmp(item, item->match, path, len))1479 return 0;1480 }14811482 return 1;1483}14841485/*1486 * This function tells us whether an excluded path matches a1487 * list of "interesting" pathspecs. That is, whether a path matched1488 * by any of the pathspecs could possibly be ignored by excluding1489 * the specified path. This can happen if:1490 *1491 * 1. the path is mentioned explicitly in the pathspec1492 *1493 * 2. the path is a directory prefix of some element in the1494 * pathspec1495 */1496static int exclude_matches_pathspec(const char *path, int pathlen,1497 const struct pathspec *pathspec)1498{1499 int i;15001501 if (!pathspec || !pathspec->nr)1502 return 0;15031504 GUARD_PATHSPEC(pathspec,1505 PATHSPEC_FROMTOP |1506 PATHSPEC_MAXDEPTH |1507 PATHSPEC_LITERAL |1508 PATHSPEC_GLOB |1509 PATHSPEC_ICASE |1510 PATHSPEC_EXCLUDE);15111512 for (i = 0; i < pathspec->nr; i++) {1513 const struct pathspec_item *item = &pathspec->items[i];1514 int len = item->nowildcard_len;15151516 if (len == pathlen &&1517 !ps_strncmp(item, item->match, path, pathlen))1518 return 1;1519 if (len > pathlen &&1520 item->match[pathlen] == '/' &&1521 !ps_strncmp(item, item->match, path, pathlen))1522 return 1;1523 }1524 return 0;1525}15261527static int get_index_dtype(struct index_state *istate,1528 const char *path, int len)1529{1530 int pos;1531 const struct cache_entry *ce;15321533 ce = index_file_exists(istate, path, len, 0);1534 if (ce) {1535 if (!ce_uptodate(ce))1536 return DT_UNKNOWN;1537 if (S_ISGITLINK(ce->ce_mode))1538 return DT_DIR;1539 /*1540 * Nobody actually cares about the1541 * difference between DT_LNK and DT_REG1542 */1543 return DT_REG;1544 }15451546 /* Try to look it up as a directory */1547 pos = index_name_pos(istate, path, len);1548 if (pos >= 0)1549 return DT_UNKNOWN;1550 pos = -pos-1;1551 while (pos < istate->cache_nr) {1552 ce = istate->cache[pos++];1553 if (strncmp(ce->name, path, len))1554 break;1555 if (ce->name[len] > '/')1556 break;1557 if (ce->name[len] < '/')1558 continue;1559 if (!ce_uptodate(ce))1560 break; /* continue? */1561 return DT_DIR;1562 }1563 return DT_UNKNOWN;1564}15651566static int get_dtype(struct dirent *de, struct index_state *istate,1567 const char *path, int len)1568{1569 int dtype = de ? DTYPE(de) : DT_UNKNOWN;1570 struct stat st;15711572 if (dtype != DT_UNKNOWN)1573 return dtype;1574 dtype = get_index_dtype(istate, path, len);1575 if (dtype != DT_UNKNOWN)1576 return dtype;1577 if (lstat(path, &st))1578 return dtype;1579 if (S_ISREG(st.st_mode))1580 return DT_REG;1581 if (S_ISDIR(st.st_mode))1582 return DT_DIR;1583 if (S_ISLNK(st.st_mode))1584 return DT_LNK;1585 return dtype;1586}15871588static enum path_treatment treat_one_path(struct dir_struct *dir,1589 struct untracked_cache_dir *untracked,1590 struct index_state *istate,1591 struct strbuf *path,1592 int baselen,1593 const struct pathspec *pathspec,1594 int dtype, struct dirent *de)1595{1596 int exclude;1597 int has_path_in_index = !!index_file_exists(istate, path->buf, path->len, ignore_case);1598 enum path_treatment path_treatment;15991600 if (dtype == DT_UNKNOWN)1601 dtype = get_dtype(de, istate, path->buf, path->len);16021603 /* Always exclude indexed files */1604 if (dtype != DT_DIR && has_path_in_index)1605 return path_none;16061607 /*1608 * When we are looking at a directory P in the working tree,1609 * there are three cases:1610 *1611 * (1) P exists in the index. Everything inside the directory P in1612 * the working tree needs to go when P is checked out from the1613 * index.1614 *1615 * (2) P does not exist in the index, but there is P/Q in the index.1616 * We know P will stay a directory when we check out the contents1617 * of the index, but we do not know yet if there is a directory1618 * P/Q in the working tree to be killed, so we need to recurse.1619 *1620 * (3) P does not exist in the index, and there is no P/Q in the index1621 * to require P to be a directory, either. Only in this case, we1622 * know that everything inside P will not be killed without1623 * recursing.1624 */1625 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1626 (dtype == DT_DIR) &&1627 !has_path_in_index &&1628 (directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent))1629 return path_none;16301631 exclude = is_excluded(dir, istate, path->buf, &dtype);16321633 /*1634 * Excluded? If we don't explicitly want to show1635 * ignored files, ignore it1636 */1637 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1638 return path_excluded;16391640 switch (dtype) {1641 default:1642 return path_none;1643 case DT_DIR:1644 strbuf_addch(path, '/');1645 path_treatment = treat_directory(dir, istate, untracked,1646 path->buf, path->len,1647 baselen, exclude, pathspec);1648 /*1649 * If 1) we only want to return directories that1650 * match an exclude pattern and 2) this directory does1651 * not match an exclude pattern but all of its1652 * contents are excluded, then indicate that we should1653 * recurse into this directory (instead of marking the1654 * directory itself as an ignored path).1655 */1656 if (!exclude &&1657 path_treatment == path_excluded &&1658 (dir->flags & DIR_SHOW_IGNORED_TOO) &&1659 (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING))1660 return path_recurse;1661 return path_treatment;1662 case DT_REG:1663 case DT_LNK:1664 return exclude ? path_excluded : path_untracked;1665 }1666}16671668static enum path_treatment treat_path_fast(struct dir_struct *dir,1669 struct untracked_cache_dir *untracked,1670 struct cached_dir *cdir,1671 struct index_state *istate,1672 struct strbuf *path,1673 int baselen,1674 const struct pathspec *pathspec)1675{1676 strbuf_setlen(path, baselen);1677 if (!cdir->ucd) {1678 strbuf_addstr(path, cdir->file);1679 return path_untracked;1680 }1681 strbuf_addstr(path, cdir->ucd->name);1682 /* treat_one_path() does this before it calls treat_directory() */1683 strbuf_complete(path, '/');1684 if (cdir->ucd->check_only)1685 /*1686 * check_only is set as a result of treat_directory() getting1687 * to its bottom. Verify again the same set of directories1688 * with check_only set.1689 */1690 return read_directory_recursive(dir, istate, path->buf, path->len,1691 cdir->ucd, 1, 0, pathspec);1692 /*1693 * We get path_recurse in the first run when1694 * directory_exists_in_index() returns index_nonexistent. We1695 * are sure that new changes in the index does not impact the1696 * outcome. Return now.1697 */1698 return path_recurse;1699}17001701static enum path_treatment treat_path(struct dir_struct *dir,1702 struct untracked_cache_dir *untracked,1703 struct cached_dir *cdir,1704 struct index_state *istate,1705 struct strbuf *path,1706 int baselen,1707 const struct pathspec *pathspec)1708{1709 int dtype;1710 struct dirent *de = cdir->de;17111712 if (!de)1713 return treat_path_fast(dir, untracked, cdir, istate, path,1714 baselen, pathspec);1715 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))1716 return path_none;1717 strbuf_setlen(path, baselen);1718 strbuf_addstr(path, de->d_name);1719 if (simplify_away(path->buf, path->len, pathspec))1720 return path_none;17211722 dtype = DTYPE(de);1723 return treat_one_path(dir, untracked, istate, path, baselen, pathspec, dtype, de);1724}17251726static void add_untracked(struct untracked_cache_dir *dir, const char *name)1727{1728 if (!dir)1729 return;1730 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,1731 dir->untracked_alloc);1732 dir->untracked[dir->untracked_nr++] = xstrdup(name);1733}17341735static int valid_cached_dir(struct dir_struct *dir,1736 struct untracked_cache_dir *untracked,1737 struct index_state *istate,1738 struct strbuf *path,1739 int check_only)1740{1741 struct stat st;17421743 if (!untracked)1744 return 0;17451746 /*1747 * With fsmonitor, we can trust the untracked cache's valid field.1748 */1749 refresh_fsmonitor(istate);1750 if (!(dir->untracked->use_fsmonitor && untracked->valid)) {1751 if (lstat(path->len ? path->buf : ".", &st)) {1752 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));1753 return 0;1754 }1755 if (!untracked->valid ||1756 match_stat_data_racy(istate, &untracked->stat_data, &st)) {1757 fill_stat_data(&untracked->stat_data, &st);1758 return 0;1759 }1760 }17611762 if (untracked->check_only != !!check_only)1763 return 0;17641765 /*1766 * prep_exclude will be called eventually on this directory,1767 * but it's called much later in last_exclude_matching(). We1768 * need it now to determine the validity of the cache for this1769 * path. The next calls will be nearly no-op, the way1770 * prep_exclude() is designed.1771 */1772 if (path->len && path->buf[path->len - 1] != '/') {1773 strbuf_addch(path, '/');1774 prep_exclude(dir, istate, path->buf, path->len);1775 strbuf_setlen(path, path->len - 1);1776 } else1777 prep_exclude(dir, istate, path->buf, path->len);17781779 /* hopefully prep_exclude() haven't invalidated this entry... */1780 return untracked->valid;1781}17821783static int open_cached_dir(struct cached_dir *cdir,1784 struct dir_struct *dir,1785 struct untracked_cache_dir *untracked,1786 struct index_state *istate,1787 struct strbuf *path,1788 int check_only)1789{1790 memset(cdir, 0, sizeof(*cdir));1791 cdir->untracked = untracked;1792 if (valid_cached_dir(dir, untracked, istate, path, check_only))1793 return 0;1794 cdir->fdir = opendir(path->len ? path->buf : ".");1795 if (dir->untracked) {1796 invalidate_directory(dir->untracked, untracked);1797 dir->untracked->dir_opened++;1798 }1799 if (!cdir->fdir)1800 return -1;1801 return 0;1802}18031804static int read_cached_dir(struct cached_dir *cdir)1805{1806 if (cdir->fdir) {1807 cdir->de = readdir(cdir->fdir);1808 if (!cdir->de)1809 return -1;1810 return 0;1811 }1812 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {1813 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1814 if (!d->recurse) {1815 cdir->nr_dirs++;1816 continue;1817 }1818 cdir->ucd = d;1819 cdir->nr_dirs++;1820 return 0;1821 }1822 cdir->ucd = NULL;1823 if (cdir->nr_files < cdir->untracked->untracked_nr) {1824 struct untracked_cache_dir *d = cdir->untracked;1825 cdir->file = d->untracked[cdir->nr_files++];1826 return 0;1827 }1828 return -1;1829}18301831static void close_cached_dir(struct cached_dir *cdir)1832{1833 if (cdir->fdir)1834 closedir(cdir->fdir);1835 /*1836 * We have gone through this directory and found no untracked1837 * entries. Mark it valid.1838 */1839 if (cdir->untracked) {1840 cdir->untracked->valid = 1;1841 cdir->untracked->recurse = 1;1842 }1843}18441845/*1846 * Read a directory tree. We currently ignore anything but1847 * directories, regular files and symlinks. That's because git1848 * doesn't handle them at all yet. Maybe that will change some1849 * day.1850 *1851 * Also, we ignore the name ".git" (even if it is not a directory).1852 * That likely will not change.1853 *1854 * If 'stop_at_first_file' is specified, 'path_excluded' is returned1855 * to signal that a file was found. This is the least significant value that1856 * indicates that a file was encountered that does not depend on the order of1857 * whether an untracked or exluded path was encountered first.1858 *1859 * Returns the most significant path_treatment value encountered in the scan.1860 * If 'stop_at_first_file' is specified, `path_excluded` is the most1861 * significant path_treatment value that will be returned.1862 */18631864static enum path_treatment read_directory_recursive(struct dir_struct *dir,1865 struct index_state *istate, const char *base, int baselen,1866 struct untracked_cache_dir *untracked, int check_only,1867 int stop_at_first_file, const struct pathspec *pathspec)1868{1869 struct cached_dir cdir;1870 enum path_treatment state, subdir_state, dir_state = path_none;1871 struct strbuf path = STRBUF_INIT;18721873 strbuf_add(&path, base, baselen);18741875 if (open_cached_dir(&cdir, dir, untracked, istate, &path, check_only))1876 goto out;18771878 if (untracked)1879 untracked->check_only = !!check_only;18801881 while (!read_cached_dir(&cdir)) {1882 /* check how the file or directory should be treated */1883 state = treat_path(dir, untracked, &cdir, istate, &path,1884 baselen, pathspec);18851886 if (state > dir_state)1887 dir_state = state;18881889 /* recurse into subdir if instructed by treat_path */1890 if ((state == path_recurse) ||1891 ((state == path_untracked) &&1892 (dir->flags & DIR_SHOW_IGNORED_TOO) &&1893 (get_dtype(cdir.de, istate, path.buf, path.len) == DT_DIR))) {1894 struct untracked_cache_dir *ud;1895 ud = lookup_untracked(dir->untracked, untracked,1896 path.buf + baselen,1897 path.len - baselen);1898 subdir_state =1899 read_directory_recursive(dir, istate, path.buf,1900 path.len, ud,1901 check_only, stop_at_first_file, pathspec);1902 if (subdir_state > dir_state)1903 dir_state = subdir_state;1904 }19051906 if (check_only) {1907 if (stop_at_first_file) {1908 /*1909 * If stopping at first file, then1910 * signal that a file was found by1911 * returning `path_excluded`. This is1912 * to return a consistent value1913 * regardless of whether an ignored or1914 * excluded file happened to be1915 * encountered 1st.1916 *1917 * In current usage, the1918 * `stop_at_first_file` is passed when1919 * an ancestor directory has matched1920 * an exclude pattern, so any found1921 * files will be excluded.1922 */1923 if (dir_state >= path_excluded) {1924 dir_state = path_excluded;1925 break;1926 }1927 }19281929 /* abort early if maximum state has been reached */1930 if (dir_state == path_untracked) {1931 if (cdir.fdir)1932 add_untracked(untracked, path.buf + baselen);1933 break;1934 }1935 /* skip the dir_add_* part */1936 continue;1937 }19381939 /* add the path to the appropriate result list */1940 switch (state) {1941 case path_excluded:1942 if (dir->flags & DIR_SHOW_IGNORED)1943 dir_add_name(dir, istate, path.buf, path.len);1944 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||1945 ((dir->flags & DIR_COLLECT_IGNORED) &&1946 exclude_matches_pathspec(path.buf, path.len,1947 pathspec)))1948 dir_add_ignored(dir, istate, path.buf, path.len);1949 break;19501951 case path_untracked:1952 if (dir->flags & DIR_SHOW_IGNORED)1953 break;1954 dir_add_name(dir, istate, path.buf, path.len);1955 if (cdir.fdir)1956 add_untracked(untracked, path.buf + baselen);1957 break;19581959 default:1960 break;1961 }1962 }1963 close_cached_dir(&cdir);1964 out:1965 strbuf_release(&path);19661967 return dir_state;1968}19691970int cmp_dir_entry(const void *p1, const void *p2)1971{1972 const struct dir_entry *e1 = *(const struct dir_entry **)p1;1973 const struct dir_entry *e2 = *(const struct dir_entry **)p2;19741975 return name_compare(e1->name, e1->len, e2->name, e2->len);1976}19771978/* check if *out lexically strictly contains *in */1979int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in)1980{1981 return (out->len < in->len) &&1982 (out->name[out->len - 1] == '/') &&1983 !memcmp(out->name, in->name, out->len);1984}19851986static int treat_leading_path(struct dir_struct *dir,1987 struct index_state *istate,1988 const char *path, int len,1989 const struct pathspec *pathspec)1990{1991 struct strbuf sb = STRBUF_INIT;1992 int baselen, rc = 0;1993 const char *cp;1994 int old_flags = dir->flags;19951996 while (len && path[len - 1] == '/')1997 len--;1998 if (!len)1999 return 1;2000 baselen = 0;2001 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;2002 while (1) {2003 cp = path + baselen + !!baselen;2004 cp = memchr(cp, '/', path + len - cp);2005 if (!cp)2006 baselen = len;2007 else2008 baselen = cp - path;2009 strbuf_setlen(&sb, 0);2010 strbuf_add(&sb, path, baselen);2011 if (!is_directory(sb.buf))2012 break;2013 if (simplify_away(sb.buf, sb.len, pathspec))2014 break;2015 if (treat_one_path(dir, NULL, istate, &sb, baselen, pathspec,2016 DT_DIR, NULL) == path_none)2017 break; /* do not recurse into it */2018 if (len <= baselen) {2019 rc = 1;2020 break; /* finished checking */2021 }2022 }2023 strbuf_release(&sb);2024 dir->flags = old_flags;2025 return rc;2026}20272028static const char *get_ident_string(void)2029{2030 static struct strbuf sb = STRBUF_INIT;2031 struct utsname uts;20322033 if (sb.len)2034 return sb.buf;2035 if (uname(&uts) < 0)2036 die_errno(_("failed to get kernel name and information"));2037 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),2038 uts.sysname);2039 return sb.buf;2040}20412042static int ident_in_untracked(const struct untracked_cache *uc)2043{2044 /*2045 * Previous git versions may have saved many NUL separated2046 * strings in the "ident" field, but it is insane to manage2047 * many locations, so just take care of the first one.2048 */20492050 return !strcmp(uc->ident.buf, get_ident_string());2051}20522053static void set_untracked_ident(struct untracked_cache *uc)2054{2055 strbuf_reset(&uc->ident);2056 strbuf_addstr(&uc->ident, get_ident_string());20572058 /*2059 * This strbuf used to contain a list of NUL separated2060 * strings, so save NUL too for backward compatibility.2061 */2062 strbuf_addch(&uc->ident, 0);2063}20642065static void new_untracked_cache(struct index_state *istate)2066{2067 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));2068 strbuf_init(&uc->ident, 100);2069 uc->exclude_per_dir = ".gitignore";2070 /* should be the same flags used by git-status */2071 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;2072 set_untracked_ident(uc);2073 istate->untracked = uc;2074 istate->cache_changed |= UNTRACKED_CHANGED;2075}20762077void add_untracked_cache(struct index_state *istate)2078{2079 if (!istate->untracked) {2080 new_untracked_cache(istate);2081 } else {2082 if (!ident_in_untracked(istate->untracked)) {2083 free_untracked_cache(istate->untracked);2084 new_untracked_cache(istate);2085 }2086 }2087}20882089void remove_untracked_cache(struct index_state *istate)2090{2091 if (istate->untracked) {2092 free_untracked_cache(istate->untracked);2093 istate->untracked = NULL;2094 istate->cache_changed |= UNTRACKED_CHANGED;2095 }2096}20972098static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,2099 int base_len,2100 const struct pathspec *pathspec)2101{2102 struct untracked_cache_dir *root;21032104 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))2105 return NULL;21062107 /*2108 * We only support $GIT_DIR/info/exclude and core.excludesfile2109 * as the global ignore rule files. Any other additions2110 * (e.g. from command line) invalidate the cache. This2111 * condition also catches running setup_standard_excludes()2112 * before setting dir->untracked!2113 */2114 if (dir->unmanaged_exclude_files)2115 return NULL;21162117 /*2118 * Optimize for the main use case only: whole-tree git2119 * status. More work involved in treat_leading_path() if we2120 * use cache on just a subset of the worktree. pathspec2121 * support could make the matter even worse.2122 */2123 if (base_len || (pathspec && pathspec->nr))2124 return NULL;21252126 /* Different set of flags may produce different results */2127 if (dir->flags != dir->untracked->dir_flags ||2128 /*2129 * See treat_directory(), case index_nonexistent. Without2130 * this flag, we may need to also cache .git file content2131 * for the resolve_gitlink_ref() call, which we don't.2132 */2133 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||2134 /* We don't support collecting ignore files */2135 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |2136 DIR_COLLECT_IGNORED)))2137 return NULL;21382139 /*2140 * If we use .gitignore in the cache and now you change it to2141 * .gitexclude, everything will go wrong.2142 */2143 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&2144 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))2145 return NULL;21462147 /*2148 * EXC_CMDL is not considered in the cache. If people set it,2149 * skip the cache.2150 */2151 if (dir->exclude_list_group[EXC_CMDL].nr)2152 return NULL;21532154 if (!ident_in_untracked(dir->untracked)) {2155 warning(_("Untracked cache is disabled on this system or location."));2156 return NULL;2157 }21582159 if (!dir->untracked->root) {2160 const int len = sizeof(*dir->untracked->root);2161 dir->untracked->root = xmalloc(len);2162 memset(dir->untracked->root, 0, len);2163 }21642165 /* Validate $GIT_DIR/info/exclude and core.excludesfile */2166 root = dir->untracked->root;2167 if (hashcmp(dir->ss_info_exclude.sha1,2168 dir->untracked->ss_info_exclude.sha1)) {2169 invalidate_gitignore(dir->untracked, root);2170 dir->untracked->ss_info_exclude = dir->ss_info_exclude;2171 }2172 if (hashcmp(dir->ss_excludes_file.sha1,2173 dir->untracked->ss_excludes_file.sha1)) {2174 invalidate_gitignore(dir->untracked, root);2175 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2176 }21772178 /* Make sure this directory is not dropped out at saving phase */2179 root->recurse = 1;2180 return root;2181}21822183int read_directory(struct dir_struct *dir, struct index_state *istate,2184 const char *path, int len, const struct pathspec *pathspec)2185{2186 struct untracked_cache_dir *untracked;21872188 if (has_symlink_leading_path(path, len))2189 return dir->nr;21902191 untracked = validate_untracked_cache(dir, len, pathspec);2192 if (!untracked)2193 /*2194 * make sure untracked cache code path is disabled,2195 * e.g. prep_exclude()2196 */2197 dir->untracked = NULL;2198 if (!len || treat_leading_path(dir, istate, path, len, pathspec))2199 read_directory_recursive(dir, istate, path, len, untracked, 0, 0, pathspec);2200 QSORT(dir->entries, dir->nr, cmp_dir_entry);2201 QSORT(dir->ignored, dir->ignored_nr, cmp_dir_entry);22022203 /*2204 * If DIR_SHOW_IGNORED_TOO is set, read_directory_recursive() will2205 * also pick up untracked contents of untracked dirs; by default2206 * we discard these, but given DIR_KEEP_UNTRACKED_CONTENTS we do not.2207 */2208 if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&2209 !(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) {2210 int i, j;22112212 /* remove from dir->entries untracked contents of untracked dirs */2213 for (i = j = 0; j < dir->nr; j++) {2214 if (i &&2215 check_dir_entry_contains(dir->entries[i - 1], dir->entries[j])) {2216 FREE_AND_NULL(dir->entries[j]);2217 } else {2218 dir->entries[i++] = dir->entries[j];2219 }2220 }22212222 dir->nr = i;2223 }22242225 if (dir->untracked) {2226 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);2227 trace_printf_key(&trace_untracked_stats,2228 "node creation: %u\n"2229 "gitignore invalidation: %u\n"2230 "directory invalidation: %u\n"2231 "opendir: %u\n",2232 dir->untracked->dir_created,2233 dir->untracked->gitignore_invalidated,2234 dir->untracked->dir_invalidated,2235 dir->untracked->dir_opened);2236 if (dir->untracked == istate->untracked &&2237 (dir->untracked->dir_opened ||2238 dir->untracked->gitignore_invalidated ||2239 dir->untracked->dir_invalidated))2240 istate->cache_changed |= UNTRACKED_CHANGED;2241 if (dir->untracked != istate->untracked) {2242 FREE_AND_NULL(dir->untracked);2243 }2244 }2245 return dir->nr;2246}22472248int file_exists(const char *f)2249{2250 struct stat sb;2251 return lstat(f, &sb) == 0;2252}22532254static int cmp_icase(char a, char b)2255{2256 if (a == b)2257 return 0;2258 if (ignore_case)2259 return toupper(a) - toupper(b);2260 return a - b;2261}22622263/*2264 * Given two normalized paths (a trailing slash is ok), if subdir is2265 * outside dir, return -1. Otherwise return the offset in subdir that2266 * can be used as relative path to dir.2267 */2268int dir_inside_of(const char *subdir, const char *dir)2269{2270 int offset = 0;22712272 assert(dir && subdir && *dir && *subdir);22732274 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {2275 dir++;2276 subdir++;2277 offset++;2278 }22792280 /* hel[p]/me vs hel[l]/yeah */2281 if (*dir && *subdir)2282 return -1;22832284 if (!*subdir)2285 return !*dir ? offset : -1; /* same dir */22862287 /* foo/[b]ar vs foo/[] */2288 if (is_dir_sep(dir[-1]))2289 return is_dir_sep(subdir[-1]) ? offset : -1;22902291 /* foo[/]bar vs foo[] */2292 return is_dir_sep(*subdir) ? offset + 1 : -1;2293}22942295int is_inside_dir(const char *dir)2296{2297 char *cwd;2298 int rc;22992300 if (!dir)2301 return 0;23022303 cwd = xgetcwd();2304 rc = (dir_inside_of(cwd, dir) >= 0);2305 free(cwd);2306 return rc;2307}23082309int is_empty_dir(const char *path)2310{2311 DIR *dir = opendir(path);2312 struct dirent *e;2313 int ret = 1;23142315 if (!dir)2316 return 0;23172318 while ((e = readdir(dir)) != NULL)2319 if (!is_dot_or_dotdot(e->d_name)) {2320 ret = 0;2321 break;2322 }23232324 closedir(dir);2325 return ret;2326}23272328static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)2329{2330 DIR *dir;2331 struct dirent *e;2332 int ret = 0, original_len = path->len, len, kept_down = 0;2333 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2334 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2335 struct object_id submodule_head;23362337 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2338 !resolve_gitlink_ref(path->buf, "HEAD", &submodule_head)) {2339 /* Do not descend and nuke a nested git work tree. */2340 if (kept_up)2341 *kept_up = 1;2342 return 0;2343 }23442345 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2346 dir = opendir(path->buf);2347 if (!dir) {2348 if (errno == ENOENT)2349 return keep_toplevel ? -1 : 0;2350 else if (errno == EACCES && !keep_toplevel)2351 /*2352 * An empty dir could be removable even if it2353 * is unreadable:2354 */2355 return rmdir(path->buf);2356 else2357 return -1;2358 }2359 strbuf_complete(path, '/');23602361 len = path->len;2362 while ((e = readdir(dir)) != NULL) {2363 struct stat st;2364 if (is_dot_or_dotdot(e->d_name))2365 continue;23662367 strbuf_setlen(path, len);2368 strbuf_addstr(path, e->d_name);2369 if (lstat(path->buf, &st)) {2370 if (errno == ENOENT)2371 /*2372 * file disappeared, which is what we2373 * wanted anyway2374 */2375 continue;2376 /* fall thru */2377 } else if (S_ISDIR(st.st_mode)) {2378 if (!remove_dir_recurse(path, flag, &kept_down))2379 continue; /* happy */2380 } else if (!only_empty &&2381 (!unlink(path->buf) || errno == ENOENT)) {2382 continue; /* happy, too */2383 }23842385 /* path too long, stat fails, or non-directory still exists */2386 ret = -1;2387 break;2388 }2389 closedir(dir);23902391 strbuf_setlen(path, original_len);2392 if (!ret && !keep_toplevel && !kept_down)2393 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;2394 else if (kept_up)2395 /*2396 * report the uplevel that it is not an error that we2397 * did not rmdir() our directory.2398 */2399 *kept_up = !ret;2400 return ret;2401}24022403int remove_dir_recursively(struct strbuf *path, int flag)2404{2405 return remove_dir_recurse(path, flag, NULL);2406}24072408static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")24092410void setup_standard_excludes(struct dir_struct *dir)2411{2412 dir->exclude_per_dir = ".gitignore";24132414 /* core.excludefile defaulting to $XDG_HOME/git/ignore */2415 if (!excludes_file)2416 excludes_file = xdg_config_home("ignore");2417 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))2418 add_excludes_from_file_1(dir, excludes_file,2419 dir->untracked ? &dir->ss_excludes_file : NULL);24202421 /* per repository user preference */2422 if (startup_info->have_repository) {2423 const char *path = git_path_info_exclude();2424 if (!access_or_warn(path, R_OK, 0))2425 add_excludes_from_file_1(dir, path,2426 dir->untracked ? &dir->ss_info_exclude : NULL);2427 }2428}24292430int remove_path(const char *name)2431{2432 char *slash;24332434 if (unlink(name) && !is_missing_file_error(errno))2435 return -1;24362437 slash = strrchr(name, '/');2438 if (slash) {2439 char *dirs = xstrdup(name);2440 slash = dirs + (slash - name);2441 do {2442 *slash = '\0';2443 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));2444 free(dirs);2445 }2446 return 0;2447}24482449/*2450 * Frees memory within dir which was allocated for exclude lists and2451 * the exclude_stack. Does not free dir itself.2452 */2453void clear_directory(struct dir_struct *dir)2454{2455 int i, j;2456 struct exclude_list_group *group;2457 struct exclude_list *el;2458 struct exclude_stack *stk;24592460 for (i = EXC_CMDL; i <= EXC_FILE; i++) {2461 group = &dir->exclude_list_group[i];2462 for (j = 0; j < group->nr; j++) {2463 el = &group->el[j];2464 if (i == EXC_DIRS)2465 free((char *)el->src);2466 clear_exclude_list(el);2467 }2468 free(group->el);2469 }24702471 stk = dir->exclude_stack;2472 while (stk) {2473 struct exclude_stack *prev = stk->prev;2474 free(stk);2475 stk = prev;2476 }2477 strbuf_release(&dir->basebuf);2478}24792480struct ondisk_untracked_cache {2481 struct stat_data info_exclude_stat;2482 struct stat_data excludes_file_stat;2483 uint32_t dir_flags;2484 unsigned char info_exclude_sha1[20];2485 unsigned char excludes_file_sha1[20];2486 char exclude_per_dir[FLEX_ARRAY];2487};24882489#define ouc_offset(x) offsetof(struct ondisk_untracked_cache, x)2490#define ouc_size(len) (ouc_offset(exclude_per_dir) + len + 1)24912492struct write_data {2493 int index; /* number of written untracked_cache_dir */2494 struct ewah_bitmap *check_only; /* from untracked_cache_dir */2495 struct ewah_bitmap *valid; /* from untracked_cache_dir */2496 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */2497 struct strbuf out;2498 struct strbuf sb_stat;2499 struct strbuf sb_sha1;2500};25012502static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)2503{2504 to->sd_ctime.sec = htonl(from->sd_ctime.sec);2505 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);2506 to->sd_mtime.sec = htonl(from->sd_mtime.sec);2507 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);2508 to->sd_dev = htonl(from->sd_dev);2509 to->sd_ino = htonl(from->sd_ino);2510 to->sd_uid = htonl(from->sd_uid);2511 to->sd_gid = htonl(from->sd_gid);2512 to->sd_size = htonl(from->sd_size);2513}25142515static void write_one_dir(struct untracked_cache_dir *untracked,2516 struct write_data *wd)2517{2518 struct stat_data stat_data;2519 struct strbuf *out = &wd->out;2520 unsigned char intbuf[16];2521 unsigned int intlen, value;2522 int i = wd->index++;25232524 /*2525 * untracked_nr should be reset whenever valid is clear, but2526 * for safety..2527 */2528 if (!untracked->valid) {2529 untracked->untracked_nr = 0;2530 untracked->check_only = 0;2531 }25322533 if (untracked->check_only)2534 ewah_set(wd->check_only, i);2535 if (untracked->valid) {2536 ewah_set(wd->valid, i);2537 stat_data_to_disk(&stat_data, &untracked->stat_data);2538 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));2539 }2540 if (!is_null_sha1(untracked->exclude_sha1)) {2541 ewah_set(wd->sha1_valid, i);2542 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);2543 }25442545 intlen = encode_varint(untracked->untracked_nr, intbuf);2546 strbuf_add(out, intbuf, intlen);25472548 /* skip non-recurse directories */2549 for (i = 0, value = 0; i < untracked->dirs_nr; i++)2550 if (untracked->dirs[i]->recurse)2551 value++;2552 intlen = encode_varint(value, intbuf);2553 strbuf_add(out, intbuf, intlen);25542555 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);25562557 for (i = 0; i < untracked->untracked_nr; i++)2558 strbuf_add(out, untracked->untracked[i],2559 strlen(untracked->untracked[i]) + 1);25602561 for (i = 0; i < untracked->dirs_nr; i++)2562 if (untracked->dirs[i]->recurse)2563 write_one_dir(untracked->dirs[i], wd);2564}25652566void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)2567{2568 struct ondisk_untracked_cache *ouc;2569 struct write_data wd;2570 unsigned char varbuf[16];2571 int varint_len;2572 size_t len = strlen(untracked->exclude_per_dir);25732574 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);2575 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2576 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2577 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);2578 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);2579 ouc->dir_flags = htonl(untracked->dir_flags);25802581 varint_len = encode_varint(untracked->ident.len, varbuf);2582 strbuf_add(out, varbuf, varint_len);2583 strbuf_addbuf(out, &untracked->ident);25842585 strbuf_add(out, ouc, ouc_size(len));2586 FREE_AND_NULL(ouc);25872588 if (!untracked->root) {2589 varint_len = encode_varint(0, varbuf);2590 strbuf_add(out, varbuf, varint_len);2591 return;2592 }25932594 wd.index = 0;2595 wd.check_only = ewah_new();2596 wd.valid = ewah_new();2597 wd.sha1_valid = ewah_new();2598 strbuf_init(&wd.out, 1024);2599 strbuf_init(&wd.sb_stat, 1024);2600 strbuf_init(&wd.sb_sha1, 1024);2601 write_one_dir(untracked->root, &wd);26022603 varint_len = encode_varint(wd.index, varbuf);2604 strbuf_add(out, varbuf, varint_len);2605 strbuf_addbuf(out, &wd.out);2606 ewah_serialize_strbuf(wd.valid, out);2607 ewah_serialize_strbuf(wd.check_only, out);2608 ewah_serialize_strbuf(wd.sha1_valid, out);2609 strbuf_addbuf(out, &wd.sb_stat);2610 strbuf_addbuf(out, &wd.sb_sha1);2611 strbuf_addch(out, '\0'); /* safe guard for string lists */26122613 ewah_free(wd.valid);2614 ewah_free(wd.check_only);2615 ewah_free(wd.sha1_valid);2616 strbuf_release(&wd.out);2617 strbuf_release(&wd.sb_stat);2618 strbuf_release(&wd.sb_sha1);2619}26202621static void free_untracked(struct untracked_cache_dir *ucd)2622{2623 int i;2624 if (!ucd)2625 return;2626 for (i = 0; i < ucd->dirs_nr; i++)2627 free_untracked(ucd->dirs[i]);2628 for (i = 0; i < ucd->untracked_nr; i++)2629 free(ucd->untracked[i]);2630 free(ucd->untracked);2631 free(ucd->dirs);2632 free(ucd);2633}26342635void free_untracked_cache(struct untracked_cache *uc)2636{2637 if (uc)2638 free_untracked(uc->root);2639 free(uc);2640}26412642struct read_data {2643 int index;2644 struct untracked_cache_dir **ucd;2645 struct ewah_bitmap *check_only;2646 struct ewah_bitmap *valid;2647 struct ewah_bitmap *sha1_valid;2648 const unsigned char *data;2649 const unsigned char *end;2650};26512652static void stat_data_from_disk(struct stat_data *to, const unsigned char *data)2653{2654 memcpy(to, data, sizeof(*to));2655 to->sd_ctime.sec = ntohl(to->sd_ctime.sec);2656 to->sd_ctime.nsec = ntohl(to->sd_ctime.nsec);2657 to->sd_mtime.sec = ntohl(to->sd_mtime.sec);2658 to->sd_mtime.nsec = ntohl(to->sd_mtime.nsec);2659 to->sd_dev = ntohl(to->sd_dev);2660 to->sd_ino = ntohl(to->sd_ino);2661 to->sd_uid = ntohl(to->sd_uid);2662 to->sd_gid = ntohl(to->sd_gid);2663 to->sd_size = ntohl(to->sd_size);2664}26652666static int read_one_dir(struct untracked_cache_dir **untracked_,2667 struct read_data *rd)2668{2669 struct untracked_cache_dir ud, *untracked;2670 const unsigned char *next, *data = rd->data, *end = rd->end;2671 unsigned int value;2672 int i, len;26732674 memset(&ud, 0, sizeof(ud));26752676 next = data;2677 value = decode_varint(&next);2678 if (next > end)2679 return -1;2680 ud.recurse = 1;2681 ud.untracked_alloc = value;2682 ud.untracked_nr = value;2683 if (ud.untracked_nr)2684 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);2685 data = next;26862687 next = data;2688 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);2689 if (next > end)2690 return -1;2691 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);2692 data = next;26932694 len = strlen((const char *)data);2695 next = data + len + 1;2696 if (next > rd->end)2697 return -1;2698 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));2699 memcpy(untracked, &ud, sizeof(ud));2700 memcpy(untracked->name, data, len + 1);2701 data = next;27022703 for (i = 0; i < untracked->untracked_nr; i++) {2704 len = strlen((const char *)data);2705 next = data + len + 1;2706 if (next > rd->end)2707 return -1;2708 untracked->untracked[i] = xstrdup((const char*)data);2709 data = next;2710 }27112712 rd->ucd[rd->index++] = untracked;2713 rd->data = data;27142715 for (i = 0; i < untracked->dirs_nr; i++) {2716 len = read_one_dir(untracked->dirs + i, rd);2717 if (len < 0)2718 return -1;2719 }2720 return 0;2721}27222723static void set_check_only(size_t pos, void *cb)2724{2725 struct read_data *rd = cb;2726 struct untracked_cache_dir *ud = rd->ucd[pos];2727 ud->check_only = 1;2728}27292730static void read_stat(size_t pos, void *cb)2731{2732 struct read_data *rd = cb;2733 struct untracked_cache_dir *ud = rd->ucd[pos];2734 if (rd->data + sizeof(struct stat_data) > rd->end) {2735 rd->data = rd->end + 1;2736 return;2737 }2738 stat_data_from_disk(&ud->stat_data, rd->data);2739 rd->data += sizeof(struct stat_data);2740 ud->valid = 1;2741}27422743static void read_sha1(size_t pos, void *cb)2744{2745 struct read_data *rd = cb;2746 struct untracked_cache_dir *ud = rd->ucd[pos];2747 if (rd->data + 20 > rd->end) {2748 rd->data = rd->end + 1;2749 return;2750 }2751 hashcpy(ud->exclude_sha1, rd->data);2752 rd->data += 20;2753}27542755static void load_sha1_stat(struct sha1_stat *sha1_stat,2756 const unsigned char *data,2757 const unsigned char *sha1)2758{2759 stat_data_from_disk(&sha1_stat->stat, data);2760 hashcpy(sha1_stat->sha1, sha1);2761 sha1_stat->valid = 1;2762}27632764struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)2765{2766 struct untracked_cache *uc;2767 struct read_data rd;2768 const unsigned char *next = data, *end = (const unsigned char *)data + sz;2769 const char *ident;2770 int ident_len, len;2771 const char *exclude_per_dir;27722773 if (sz <= 1 || end[-1] != '\0')2774 return NULL;2775 end--;27762777 ident_len = decode_varint(&next);2778 if (next + ident_len > end)2779 return NULL;2780 ident = (const char *)next;2781 next += ident_len;27822783 if (next + ouc_size(0) > end)2784 return NULL;27852786 uc = xcalloc(1, sizeof(*uc));2787 strbuf_init(&uc->ident, ident_len);2788 strbuf_add(&uc->ident, ident, ident_len);2789 load_sha1_stat(&uc->ss_info_exclude,2790 next + ouc_offset(info_exclude_stat),2791 next + ouc_offset(info_exclude_sha1));2792 load_sha1_stat(&uc->ss_excludes_file,2793 next + ouc_offset(excludes_file_stat),2794 next + ouc_offset(excludes_file_sha1));2795 uc->dir_flags = get_be32(next + ouc_offset(dir_flags));2796 exclude_per_dir = (const char *)next + ouc_offset(exclude_per_dir);2797 uc->exclude_per_dir = xstrdup(exclude_per_dir);2798 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */2799 next += ouc_size(strlen(exclude_per_dir));2800 if (next >= end)2801 goto done2;28022803 len = decode_varint(&next);2804 if (next > end || len == 0)2805 goto done2;28062807 rd.valid = ewah_new();2808 rd.check_only = ewah_new();2809 rd.sha1_valid = ewah_new();2810 rd.data = next;2811 rd.end = end;2812 rd.index = 0;2813 ALLOC_ARRAY(rd.ucd, len);28142815 if (read_one_dir(&uc->root, &rd) || rd.index != len)2816 goto done;28172818 next = rd.data;2819 len = ewah_read_mmap(rd.valid, next, end - next);2820 if (len < 0)2821 goto done;28222823 next += len;2824 len = ewah_read_mmap(rd.check_only, next, end - next);2825 if (len < 0)2826 goto done;28272828 next += len;2829 len = ewah_read_mmap(rd.sha1_valid, next, end - next);2830 if (len < 0)2831 goto done;28322833 ewah_each_bit(rd.check_only, set_check_only, &rd);2834 rd.data = next + len;2835 ewah_each_bit(rd.valid, read_stat, &rd);2836 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);2837 next = rd.data;28382839done:2840 free(rd.ucd);2841 ewah_free(rd.valid);2842 ewah_free(rd.check_only);2843 ewah_free(rd.sha1_valid);2844done2:2845 if (next != end) {2846 free_untracked_cache(uc);2847 uc = NULL;2848 }2849 return uc;2850}28512852static void invalidate_one_directory(struct untracked_cache *uc,2853 struct untracked_cache_dir *ucd)2854{2855 uc->dir_invalidated++;2856 ucd->valid = 0;2857 ucd->untracked_nr = 0;2858}28592860/*2861 * Normally when an entry is added or removed from a directory,2862 * invalidating that directory is enough. No need to touch its2863 * ancestors. When a directory is shown as "foo/bar/" in git-status2864 * however, deleting or adding an entry may have cascading effect.2865 *2866 * Say the "foo/bar/file" has become untracked, we need to tell the2867 * untracked_cache_dir of "foo" that "bar/" is not an untracked2868 * directory any more (because "bar" is managed by foo as an untracked2869 * "file").2870 *2871 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2872 * was the last untracked entry in the entire "foo", we should show2873 * "foo/" instead. Which means we have to invalidate past "bar" up to2874 * "foo".2875 *2876 * This function traverses all directories from root to leaf. If there2877 * is a chance of one of the above cases happening, we invalidate back2878 * to root. Otherwise we just invalidate the leaf. There may be a more2879 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2880 * detect these cases and avoid unnecessary invalidation, for example,2881 * checking for the untracked entry named "bar/" in "foo", but for now2882 * stick to something safe and simple.2883 */2884static int invalidate_one_component(struct untracked_cache *uc,2885 struct untracked_cache_dir *dir,2886 const char *path, int len)2887{2888 const char *rest = strchr(path, '/');28892890 if (rest) {2891 int component_len = rest - path;2892 struct untracked_cache_dir *d =2893 lookup_untracked(uc, dir, path, component_len);2894 int ret =2895 invalidate_one_component(uc, d, rest + 1,2896 len - (component_len + 1));2897 if (ret)2898 invalidate_one_directory(uc, dir);2899 return ret;2900 }29012902 invalidate_one_directory(uc, dir);2903 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2904}29052906void untracked_cache_invalidate_path(struct index_state *istate,2907 const char *path)2908{2909 if (!istate->untracked || !istate->untracked->root)2910 return;2911 invalidate_one_component(istate->untracked, istate->untracked->root,2912 path, strlen(path));2913}29142915void untracked_cache_remove_from_index(struct index_state *istate,2916 const char *path)2917{2918 untracked_cache_invalidate_path(istate, path);2919}29202921void untracked_cache_add_to_index(struct index_state *istate,2922 const char *path)2923{2924 untracked_cache_invalidate_path(istate, path);2925}29262927/* Update gitfile and core.worktree setting to connect work tree and git dir */2928void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)2929{2930 struct strbuf gitfile_sb = STRBUF_INIT;2931 struct strbuf cfg_sb = STRBUF_INIT;2932 struct strbuf rel_path = STRBUF_INIT;2933 char *git_dir, *work_tree;29342935 /* Prepare .git file */2936 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);2937 if (safe_create_leading_directories_const(gitfile_sb.buf))2938 die(_("could not create directories for %s"), gitfile_sb.buf);29392940 /* Prepare config file */2941 strbuf_addf(&cfg_sb, "%s/config", git_dir_);2942 if (safe_create_leading_directories_const(cfg_sb.buf))2943 die(_("could not create directories for %s"), cfg_sb.buf);29442945 git_dir = real_pathdup(git_dir_, 1);2946 work_tree = real_pathdup(work_tree_, 1);29472948 /* Write .git file */2949 write_file(gitfile_sb.buf, "gitdir: %s",2950 relative_path(git_dir, work_tree, &rel_path));2951 /* Update core.worktree setting */2952 git_config_set_in_file(cfg_sb.buf, "core.worktree",2953 relative_path(work_tree, git_dir, &rel_path));29542955 strbuf_release(&gitfile_sb);2956 strbuf_release(&cfg_sb);2957 strbuf_release(&rel_path);2958 free(work_tree);2959 free(git_dir);2960}29612962/*2963 * Migrate the git directory of the given path from old_git_dir to new_git_dir.2964 */2965void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)2966{2967 if (rename(old_git_dir, new_git_dir) < 0)2968 die_errno(_("could not migrate git directory from '%s' to '%s'"),2969 old_git_dir, new_git_dir);29702971 connect_work_tree_and_git_dir(path, new_git_dir);2972}