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#include "submodule-config.h" 23 24/* 25 * Tells read_directory_recursive how a file or directory should be treated. 26 * Values are ordered by significance, e.g. if a directory contains both 27 * excluded and untracked files, it is listed as untracked because 28 * path_untracked > path_excluded. 29 */ 30enum path_treatment { 31 path_none = 0, 32 path_recurse, 33 path_excluded, 34 path_untracked 35}; 36 37/* 38 * Support data structure for our opendir/readdir/closedir wrappers 39 */ 40struct cached_dir { 41 DIR *fdir; 42 struct untracked_cache_dir *untracked; 43 int nr_files; 44 int nr_dirs; 45 46 struct dirent *de; 47 const char *file; 48 struct untracked_cache_dir *ucd; 49}; 50 51static enum path_treatment read_directory_recursive(struct dir_struct *dir, 52 struct index_state *istate, const char *path, int len, 53 struct untracked_cache_dir *untracked, 54 int check_only, int stop_at_first_file, const struct pathspec *pathspec); 55static int get_dtype(struct dirent *de, struct index_state *istate, 56 const char *path, int len); 57 58int count_slashes(const char *s) 59{ 60 int cnt = 0; 61 while (*s) 62 if (*s++ == '/') 63 cnt++; 64 return cnt; 65} 66 67int fspathcmp(const char *a, const char *b) 68{ 69 return ignore_case ? strcasecmp(a, b) : strcmp(a, b); 70} 71 72int fspathncmp(const char *a, const char *b, size_t count) 73{ 74 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); 75} 76 77int git_fnmatch(const struct pathspec_item *item, 78 const char *pattern, const char *string, 79 int prefix) 80{ 81 if (prefix > 0) { 82 if (ps_strncmp(item, pattern, string, prefix)) 83 return WM_NOMATCH; 84 pattern += prefix; 85 string += prefix; 86 } 87 if (item->flags & PATHSPEC_ONESTAR) { 88 int pattern_len = strlen(++pattern); 89 int string_len = strlen(string); 90 return string_len < pattern_len || 91 ps_strcmp(item, pattern, 92 string + string_len - pattern_len); 93 } 94 if (item->magic & PATHSPEC_GLOB) 95 return wildmatch(pattern, string, 96 WM_PATHNAME | 97 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0)); 98 else 99 /* wildmatch has not learned no FNM_PATHNAME mode yet */ 100 return wildmatch(pattern, string, 101 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0); 102} 103 104static int fnmatch_icase_mem(const char *pattern, int patternlen, 105 const char *string, int stringlen, 106 int flags) 107{ 108 int match_status; 109 struct strbuf pat_buf = STRBUF_INIT; 110 struct strbuf str_buf = STRBUF_INIT; 111 const char *use_pat = pattern; 112 const char *use_str = string; 113 114 if (pattern[patternlen]) { 115 strbuf_add(&pat_buf, pattern, patternlen); 116 use_pat = pat_buf.buf; 117 } 118 if (string[stringlen]) { 119 strbuf_add(&str_buf, string, stringlen); 120 use_str = str_buf.buf; 121 } 122 123 if (ignore_case) 124 flags |= WM_CASEFOLD; 125 match_status = wildmatch(use_pat, use_str, flags); 126 127 strbuf_release(&pat_buf); 128 strbuf_release(&str_buf); 129 130 return match_status; 131} 132 133static size_t common_prefix_len(const struct pathspec *pathspec) 134{ 135 int n; 136 size_t max = 0; 137 138 /* 139 * ":(icase)path" is treated as a pathspec full of 140 * wildcard. In other words, only prefix is considered common 141 * prefix. If the pathspec is abc/foo abc/bar, running in 142 * subdir xyz, the common prefix is still xyz, not xuz/abc as 143 * in non-:(icase). 144 */ 145 GUARD_PATHSPEC(pathspec, 146 PATHSPEC_FROMTOP | 147 PATHSPEC_MAXDEPTH | 148 PATHSPEC_LITERAL | 149 PATHSPEC_GLOB | 150 PATHSPEC_ICASE | 151 PATHSPEC_EXCLUDE | 152 PATHSPEC_ATTR); 153 154 for (n = 0; n < pathspec->nr; n++) { 155 size_t i = 0, len = 0, item_len; 156 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE) 157 continue; 158 if (pathspec->items[n].magic & PATHSPEC_ICASE) 159 item_len = pathspec->items[n].prefix; 160 else 161 item_len = pathspec->items[n].nowildcard_len; 162 while (i < item_len && (n == 0 || i < max)) { 163 char c = pathspec->items[n].match[i]; 164 if (c != pathspec->items[0].match[i]) 165 break; 166 if (c == '/') 167 len = i + 1; 168 i++; 169 } 170 if (n == 0 || len < max) { 171 max = len; 172 if (!max) 173 break; 174 } 175 } 176 return max; 177} 178 179/* 180 * Returns a copy of the longest leading path common among all 181 * pathspecs. 182 */ 183char *common_prefix(const struct pathspec *pathspec) 184{ 185 unsigned long len = common_prefix_len(pathspec); 186 187 return len ? xmemdupz(pathspec->items[0].match, len) : NULL; 188} 189 190int fill_directory(struct dir_struct *dir, 191 struct index_state *istate, 192 const struct pathspec *pathspec) 193{ 194 const char *prefix; 195 size_t prefix_len; 196 197 /* 198 * Calculate common prefix for the pathspec, and 199 * use that to optimize the directory walk 200 */ 201 prefix_len = common_prefix_len(pathspec); 202 prefix = prefix_len ? pathspec->items[0].match : ""; 203 204 /* Read the directory and prune it */ 205 read_directory(dir, istate, prefix, prefix_len, pathspec); 206 207 return prefix_len; 208} 209 210int within_depth(const char *name, int namelen, 211 int depth, int max_depth) 212{ 213 const char *cp = name, *cpe = name + namelen; 214 215 while (cp < cpe) { 216 if (*cp++ != '/') 217 continue; 218 depth++; 219 if (depth > max_depth) 220 return 0; 221 } 222 return 1; 223} 224 225/* 226 * Read the contents of the blob with the given OID into a buffer. 227 * Append a trailing LF to the end if the last line doesn't have one. 228 * 229 * Returns: 230 * -1 when the OID is invalid or unknown or does not refer to a blob. 231 * 0 when the blob is empty. 232 * 1 along with { data, size } of the (possibly augmented) buffer 233 * when successful. 234 * 235 * Optionally updates the given oid_stat with the given OID (when valid). 236 */ 237static int do_read_blob(const struct object_id *oid, struct oid_stat *oid_stat, 238 size_t *size_out, char **data_out) 239{ 240 enum object_type type; 241 unsigned long sz; 242 char *data; 243 244 *size_out = 0; 245 *data_out = NULL; 246 247 data = read_object_file(oid, &type, &sz); 248 if (!data || type != OBJ_BLOB) { 249 free(data); 250 return -1; 251 } 252 253 if (oid_stat) { 254 memset(&oid_stat->stat, 0, sizeof(oid_stat->stat)); 255 oidcpy(&oid_stat->oid, oid); 256 } 257 258 if (sz == 0) { 259 free(data); 260 return 0; 261 } 262 263 if (data[sz - 1] != '\n') { 264 data = xrealloc(data, st_add(sz, 1)); 265 data[sz++] = '\n'; 266 } 267 268 *size_out = xsize_t(sz); 269 *data_out = data; 270 271 return 1; 272} 273 274#define DO_MATCH_EXCLUDE (1<<0) 275#define DO_MATCH_DIRECTORY (1<<1) 276#define DO_MATCH_SUBMODULE (1<<2) 277 278static int match_attrs(const char *name, int namelen, 279 const struct pathspec_item *item) 280{ 281 int i; 282 283 git_check_attr(name, item->attr_check); 284 for (i = 0; i < item->attr_match_nr; i++) { 285 const char *value; 286 int matched; 287 enum attr_match_mode match_mode; 288 289 value = item->attr_check->items[i].value; 290 match_mode = item->attr_match[i].match_mode; 291 292 if (ATTR_TRUE(value)) 293 matched = (match_mode == MATCH_SET); 294 else if (ATTR_FALSE(value)) 295 matched = (match_mode == MATCH_UNSET); 296 else if (ATTR_UNSET(value)) 297 matched = (match_mode == MATCH_UNSPECIFIED); 298 else 299 matched = (match_mode == MATCH_VALUE && 300 !strcmp(item->attr_match[i].value, value)); 301 if (!matched) 302 return 0; 303 } 304 305 return 1; 306} 307 308/* 309 * Does 'match' match the given name? 310 * A match is found if 311 * 312 * (1) the 'match' string is leading directory of 'name', or 313 * (2) the 'match' string is a wildcard and matches 'name', or 314 * (3) the 'match' string is exactly the same as 'name'. 315 * 316 * and the return value tells which case it was. 317 * 318 * It returns 0 when there is no match. 319 */ 320static int match_pathspec_item(const struct pathspec_item *item, int prefix, 321 const char *name, int namelen, unsigned flags) 322{ 323 /* name/namelen has prefix cut off by caller */ 324 const char *match = item->match + prefix; 325 int matchlen = item->len - prefix; 326 327 /* 328 * The normal call pattern is: 329 * 1. prefix = common_prefix_len(ps); 330 * 2. prune something, or fill_directory 331 * 3. match_pathspec() 332 * 333 * 'prefix' at #1 may be shorter than the command's prefix and 334 * it's ok for #2 to match extra files. Those extras will be 335 * trimmed at #3. 336 * 337 * Suppose the pathspec is 'foo' and '../bar' running from 338 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 339 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 340 * user does not want XYZ/foo, only the "foo" part should be 341 * case-insensitive. We need to filter out XYZ/foo here. In 342 * other words, we do not trust the caller on comparing the 343 * prefix part when :(icase) is involved. We do exact 344 * comparison ourselves. 345 * 346 * Normally the caller (common_prefix_len() in fact) does 347 * _exact_ matching on name[-prefix+1..-1] and we do not need 348 * to check that part. Be defensive and check it anyway, in 349 * case common_prefix_len is changed, or a new caller is 350 * introduced that does not use common_prefix_len. 351 * 352 * If the penalty turns out too high when prefix is really 353 * long, maybe change it to 354 * strncmp(match, name, item->prefix - prefix) 355 */ 356 if (item->prefix && (item->magic & PATHSPEC_ICASE) && 357 strncmp(item->match, name - prefix, item->prefix)) 358 return 0; 359 360 if (item->attr_match_nr && !match_attrs(name, namelen, item)) 361 return 0; 362 363 /* If the match was just the prefix, we matched */ 364 if (!*match) 365 return MATCHED_RECURSIVELY; 366 367 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 368 if (matchlen == namelen) 369 return MATCHED_EXACTLY; 370 371 if (match[matchlen-1] == '/' || name[matchlen] == '/') 372 return MATCHED_RECURSIVELY; 373 } else if ((flags & DO_MATCH_DIRECTORY) && 374 match[matchlen - 1] == '/' && 375 namelen == matchlen - 1 && 376 !ps_strncmp(item, match, name, namelen)) 377 return MATCHED_EXACTLY; 378 379 if (item->nowildcard_len < item->len && 380 !git_fnmatch(item, match, name, 381 item->nowildcard_len - prefix)) 382 return MATCHED_FNMATCH; 383 384 /* Perform checks to see if "name" is a super set of the pathspec */ 385 if (flags & DO_MATCH_SUBMODULE) { 386 /* name is a literal prefix of the pathspec */ 387 if ((namelen < matchlen) && 388 (match[namelen] == '/') && 389 !ps_strncmp(item, match, name, namelen)) 390 return MATCHED_RECURSIVELY; 391 392 /* name" doesn't match up to the first wild character */ 393 if (item->nowildcard_len < item->len && 394 ps_strncmp(item, match, name, 395 item->nowildcard_len - prefix)) 396 return 0; 397 398 /* 399 * Here is where we would perform a wildmatch to check if 400 * "name" can be matched as a directory (or a prefix) against 401 * the pathspec. Since wildmatch doesn't have this capability 402 * at the present we have to punt and say that it is a match, 403 * potentially returning a false positive 404 * The submodules themselves will be able to perform more 405 * accurate matching to determine if the pathspec matches. 406 */ 407 return MATCHED_RECURSIVELY; 408 } 409 410 return 0; 411} 412 413/* 414 * Given a name and a list of pathspecs, returns the nature of the 415 * closest (i.e. most specific) match of the name to any of the 416 * pathspecs. 417 * 418 * The caller typically calls this multiple times with the same 419 * pathspec and seen[] array but with different name/namelen 420 * (e.g. entries from the index) and is interested in seeing if and 421 * how each pathspec matches all the names it calls this function 422 * with. A mark is left in the seen[] array for each pathspec element 423 * indicating the closest type of match that element achieved, so if 424 * seen[n] remains zero after multiple invocations, that means the nth 425 * pathspec did not match any names, which could indicate that the 426 * user mistyped the nth pathspec. 427 */ 428static int do_match_pathspec(const struct pathspec *ps, 429 const char *name, int namelen, 430 int prefix, char *seen, 431 unsigned flags) 432{ 433 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE; 434 435 GUARD_PATHSPEC(ps, 436 PATHSPEC_FROMTOP | 437 PATHSPEC_MAXDEPTH | 438 PATHSPEC_LITERAL | 439 PATHSPEC_GLOB | 440 PATHSPEC_ICASE | 441 PATHSPEC_EXCLUDE | 442 PATHSPEC_ATTR); 443 444 if (!ps->nr) { 445 if (!ps->recursive || 446 !(ps->magic & PATHSPEC_MAXDEPTH) || 447 ps->max_depth == -1) 448 return MATCHED_RECURSIVELY; 449 450 if (within_depth(name, namelen, 0, ps->max_depth)) 451 return MATCHED_EXACTLY; 452 else 453 return 0; 454 } 455 456 name += prefix; 457 namelen -= prefix; 458 459 for (i = ps->nr - 1; i >= 0; i--) { 460 int how; 461 462 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 463 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 464 continue; 465 466 if (seen && seen[i] == MATCHED_EXACTLY) 467 continue; 468 /* 469 * Make exclude patterns optional and never report 470 * "pathspec ':(exclude)foo' matches no files" 471 */ 472 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 473 seen[i] = MATCHED_FNMATCH; 474 how = match_pathspec_item(ps->items+i, prefix, name, 475 namelen, flags); 476 if (ps->recursive && 477 (ps->magic & PATHSPEC_MAXDEPTH) && 478 ps->max_depth != -1 && 479 how && how != MATCHED_FNMATCH) { 480 int len = ps->items[i].len; 481 if (name[len] == '/') 482 len++; 483 if (within_depth(name+len, namelen-len, 0, ps->max_depth)) 484 how = MATCHED_EXACTLY; 485 else 486 how = 0; 487 } 488 if (how) { 489 if (retval < how) 490 retval = how; 491 if (seen && seen[i] < how) 492 seen[i] = how; 493 } 494 } 495 return retval; 496} 497 498int match_pathspec(const struct pathspec *ps, 499 const char *name, int namelen, 500 int prefix, char *seen, int is_dir) 501{ 502 int positive, negative; 503 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0; 504 positive = do_match_pathspec(ps, name, namelen, 505 prefix, seen, flags); 506 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 507 return positive; 508 negative = do_match_pathspec(ps, name, namelen, 509 prefix, seen, 510 flags | DO_MATCH_EXCLUDE); 511 return negative ? 0 : positive; 512} 513 514/** 515 * Check if a submodule is a superset of the pathspec 516 */ 517int submodule_path_match(const struct pathspec *ps, 518 const char *submodule_name, 519 char *seen) 520{ 521 int matched = do_match_pathspec(ps, submodule_name, 522 strlen(submodule_name), 523 0, seen, 524 DO_MATCH_DIRECTORY | 525 DO_MATCH_SUBMODULE); 526 return matched; 527} 528 529int report_path_error(const char *ps_matched, 530 const struct pathspec *pathspec, 531 const char *prefix) 532{ 533 /* 534 * Make sure all pathspec matched; otherwise it is an error. 535 */ 536 int num, errors = 0; 537 for (num = 0; num < pathspec->nr; num++) { 538 int other, found_dup; 539 540 if (ps_matched[num]) 541 continue; 542 /* 543 * The caller might have fed identical pathspec 544 * twice. Do not barf on such a mistake. 545 * FIXME: parse_pathspec should have eliminated 546 * duplicate pathspec. 547 */ 548 for (found_dup = other = 0; 549 !found_dup && other < pathspec->nr; 550 other++) { 551 if (other == num || !ps_matched[other]) 552 continue; 553 if (!strcmp(pathspec->items[other].original, 554 pathspec->items[num].original)) 555 /* 556 * Ok, we have a match already. 557 */ 558 found_dup = 1; 559 } 560 if (found_dup) 561 continue; 562 563 error("pathspec '%s' did not match any file(s) known to git", 564 pathspec->items[num].original); 565 errors++; 566 } 567 return errors; 568} 569 570/* 571 * Return the length of the "simple" part of a path match limiter. 572 */ 573int simple_length(const char *match) 574{ 575 int len = -1; 576 577 for (;;) { 578 unsigned char c = *match++; 579 len++; 580 if (c == '\0' || is_glob_special(c)) 581 return len; 582 } 583} 584 585int no_wildcard(const char *string) 586{ 587 return string[simple_length(string)] == '\0'; 588} 589 590void parse_exclude_pattern(const char **pattern, 591 int *patternlen, 592 unsigned *flags, 593 int *nowildcardlen) 594{ 595 const char *p = *pattern; 596 size_t i, len; 597 598 *flags = 0; 599 if (*p == '!') { 600 *flags |= EXC_FLAG_NEGATIVE; 601 p++; 602 } 603 len = strlen(p); 604 if (len && p[len - 1] == '/') { 605 len--; 606 *flags |= EXC_FLAG_MUSTBEDIR; 607 } 608 for (i = 0; i < len; i++) { 609 if (p[i] == '/') 610 break; 611 } 612 if (i == len) 613 *flags |= EXC_FLAG_NODIR; 614 *nowildcardlen = simple_length(p); 615 /* 616 * we should have excluded the trailing slash from 'p' too, 617 * but that's one more allocation. Instead just make sure 618 * nowildcardlen does not exceed real patternlen 619 */ 620 if (*nowildcardlen > len) 621 *nowildcardlen = len; 622 if (*p == '*' && no_wildcard(p + 1)) 623 *flags |= EXC_FLAG_ENDSWITH; 624 *pattern = p; 625 *patternlen = len; 626} 627 628void add_exclude(const char *string, const char *base, 629 int baselen, struct exclude_list *el, int srcpos) 630{ 631 struct exclude *x; 632 int patternlen; 633 unsigned flags; 634 int nowildcardlen; 635 636 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 637 if (flags & EXC_FLAG_MUSTBEDIR) { 638 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen); 639 } else { 640 x = xmalloc(sizeof(*x)); 641 x->pattern = string; 642 } 643 x->patternlen = patternlen; 644 x->nowildcardlen = nowildcardlen; 645 x->base = base; 646 x->baselen = baselen; 647 x->flags = flags; 648 x->srcpos = srcpos; 649 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc); 650 el->excludes[el->nr++] = x; 651 x->el = el; 652} 653 654static int read_skip_worktree_file_from_index(const struct index_state *istate, 655 const char *path, 656 size_t *size_out, char **data_out, 657 struct oid_stat *oid_stat) 658{ 659 int pos, len; 660 661 len = strlen(path); 662 pos = index_name_pos(istate, path, len); 663 if (pos < 0) 664 return -1; 665 if (!ce_skip_worktree(istate->cache[pos])) 666 return -1; 667 668 return do_read_blob(&istate->cache[pos]->oid, oid_stat, size_out, data_out); 669} 670 671/* 672 * Frees memory within el which was allocated for exclude patterns and 673 * the file buffer. Does not free el itself. 674 */ 675void clear_exclude_list(struct exclude_list *el) 676{ 677 int i; 678 679 for (i = 0; i < el->nr; i++) 680 free(el->excludes[i]); 681 free(el->excludes); 682 free(el->filebuf); 683 684 memset(el, 0, sizeof(*el)); 685} 686 687static void trim_trailing_spaces(char *buf) 688{ 689 char *p, *last_space = NULL; 690 691 for (p = buf; *p; p++) 692 switch (*p) { 693 case ' ': 694 if (!last_space) 695 last_space = p; 696 break; 697 case '\\': 698 p++; 699 if (!*p) 700 return; 701 /* fallthrough */ 702 default: 703 last_space = NULL; 704 } 705 706 if (last_space) 707 *last_space = '\0'; 708} 709 710/* 711 * Given a subdirectory name and "dir" of the current directory, 712 * search the subdir in "dir" and return it, or create a new one if it 713 * does not exist in "dir". 714 * 715 * If "name" has the trailing slash, it'll be excluded in the search. 716 */ 717static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 718 struct untracked_cache_dir *dir, 719 const char *name, int len) 720{ 721 int first, last; 722 struct untracked_cache_dir *d; 723 if (!dir) 724 return NULL; 725 if (len && name[len - 1] == '/') 726 len--; 727 first = 0; 728 last = dir->dirs_nr; 729 while (last > first) { 730 int cmp, next = (last + first) >> 1; 731 d = dir->dirs[next]; 732 cmp = strncmp(name, d->name, len); 733 if (!cmp && strlen(d->name) > len) 734 cmp = -1; 735 if (!cmp) 736 return d; 737 if (cmp < 0) { 738 last = next; 739 continue; 740 } 741 first = next+1; 742 } 743 744 uc->dir_created++; 745 FLEX_ALLOC_MEM(d, name, name, len); 746 747 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc); 748 MOVE_ARRAY(dir->dirs + first + 1, dir->dirs + first, 749 dir->dirs_nr - first); 750 dir->dirs_nr++; 751 dir->dirs[first] = d; 752 return d; 753} 754 755static void do_invalidate_gitignore(struct untracked_cache_dir *dir) 756{ 757 int i; 758 dir->valid = 0; 759 dir->untracked_nr = 0; 760 for (i = 0; i < dir->dirs_nr; i++) 761 do_invalidate_gitignore(dir->dirs[i]); 762} 763 764static void invalidate_gitignore(struct untracked_cache *uc, 765 struct untracked_cache_dir *dir) 766{ 767 uc->gitignore_invalidated++; 768 do_invalidate_gitignore(dir); 769} 770 771static void invalidate_directory(struct untracked_cache *uc, 772 struct untracked_cache_dir *dir) 773{ 774 int i; 775 776 /* 777 * Invalidation increment here is just roughly correct. If 778 * untracked_nr or any of dirs[].recurse is non-zero, we 779 * should increment dir_invalidated too. But that's more 780 * expensive to do. 781 */ 782 if (dir->valid) 783 uc->dir_invalidated++; 784 785 dir->valid = 0; 786 dir->untracked_nr = 0; 787 for (i = 0; i < dir->dirs_nr; i++) 788 dir->dirs[i]->recurse = 0; 789} 790 791static int add_excludes_from_buffer(char *buf, size_t size, 792 const char *base, int baselen, 793 struct exclude_list *el); 794 795/* 796 * Given a file with name "fname", read it (either from disk, or from 797 * an index if 'istate' is non-null), parse it and store the 798 * exclude rules in "el". 799 * 800 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 801 * stat data from disk (only valid if add_excludes returns zero). If 802 * ss_valid is non-zero, "ss" must contain good value as input. 803 */ 804static int add_excludes(const char *fname, const char *base, int baselen, 805 struct exclude_list *el, struct index_state *istate, 806 struct oid_stat *oid_stat) 807{ 808 struct stat st; 809 int r; 810 int fd; 811 size_t size = 0; 812 char *buf; 813 814 fd = open(fname, O_RDONLY); 815 if (fd < 0 || fstat(fd, &st) < 0) { 816 if (fd < 0) 817 warn_on_fopen_errors(fname); 818 else 819 close(fd); 820 if (!istate) 821 return -1; 822 r = read_skip_worktree_file_from_index(istate, fname, 823 &size, &buf, 824 oid_stat); 825 if (r != 1) 826 return r; 827 } else { 828 size = xsize_t(st.st_size); 829 if (size == 0) { 830 if (oid_stat) { 831 fill_stat_data(&oid_stat->stat, &st); 832 oidcpy(&oid_stat->oid, the_hash_algo->empty_blob); 833 oid_stat->valid = 1; 834 } 835 close(fd); 836 return 0; 837 } 838 buf = xmallocz(size); 839 if (read_in_full(fd, buf, size) != size) { 840 free(buf); 841 close(fd); 842 return -1; 843 } 844 buf[size++] = '\n'; 845 close(fd); 846 if (oid_stat) { 847 int pos; 848 if (oid_stat->valid && 849 !match_stat_data_racy(istate, &oid_stat->stat, &st)) 850 ; /* no content change, ss->sha1 still good */ 851 else if (istate && 852 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 && 853 !ce_stage(istate->cache[pos]) && 854 ce_uptodate(istate->cache[pos]) && 855 !would_convert_to_git(istate, fname)) 856 oidcpy(&oid_stat->oid, 857 &istate->cache[pos]->oid); 858 else 859 hash_object_file(buf, size, "blob", 860 &oid_stat->oid); 861 fill_stat_data(&oid_stat->stat, &st); 862 oid_stat->valid = 1; 863 } 864 } 865 866 add_excludes_from_buffer(buf, size, base, baselen, el); 867 return 0; 868} 869 870static int add_excludes_from_buffer(char *buf, size_t size, 871 const char *base, int baselen, 872 struct exclude_list *el) 873{ 874 int i, lineno = 1; 875 char *entry; 876 877 el->filebuf = buf; 878 879 if (skip_utf8_bom(&buf, size)) 880 size -= buf - el->filebuf; 881 882 entry = buf; 883 884 for (i = 0; i < size; i++) { 885 if (buf[i] == '\n') { 886 if (entry != buf + i && entry[0] != '#') { 887 buf[i - (i && buf[i-1] == '\r')] = 0; 888 trim_trailing_spaces(entry); 889 add_exclude(entry, base, baselen, el, lineno); 890 } 891 lineno++; 892 entry = buf + i + 1; 893 } 894 } 895 return 0; 896} 897 898int add_excludes_from_file_to_list(const char *fname, const char *base, 899 int baselen, struct exclude_list *el, 900 struct index_state *istate) 901{ 902 return add_excludes(fname, base, baselen, el, istate, NULL); 903} 904 905int add_excludes_from_blob_to_list( 906 struct object_id *oid, 907 const char *base, int baselen, 908 struct exclude_list *el) 909{ 910 char *buf; 911 size_t size; 912 int r; 913 914 r = do_read_blob(oid, NULL, &size, &buf); 915 if (r != 1) 916 return r; 917 918 add_excludes_from_buffer(buf, size, base, baselen, el); 919 return 0; 920} 921 922struct exclude_list *add_exclude_list(struct dir_struct *dir, 923 int group_type, const char *src) 924{ 925 struct exclude_list *el; 926 struct exclude_list_group *group; 927 928 group = &dir->exclude_list_group[group_type]; 929 ALLOC_GROW(group->el, group->nr + 1, group->alloc); 930 el = &group->el[group->nr++]; 931 memset(el, 0, sizeof(*el)); 932 el->src = src; 933 return el; 934} 935 936/* 937 * Used to set up core.excludesfile and .git/info/exclude lists. 938 */ 939static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname, 940 struct oid_stat *oid_stat) 941{ 942 struct exclude_list *el; 943 /* 944 * catch setup_standard_excludes() that's called before 945 * dir->untracked is assigned. That function behaves 946 * differently when dir->untracked is non-NULL. 947 */ 948 if (!dir->untracked) 949 dir->unmanaged_exclude_files++; 950 el = add_exclude_list(dir, EXC_FILE, fname); 951 if (add_excludes(fname, "", 0, el, NULL, oid_stat) < 0) 952 die("cannot use %s as an exclude file", fname); 953} 954 955void add_excludes_from_file(struct dir_struct *dir, const char *fname) 956{ 957 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ 958 add_excludes_from_file_1(dir, fname, NULL); 959} 960 961int match_basename(const char *basename, int basenamelen, 962 const char *pattern, int prefix, int patternlen, 963 unsigned flags) 964{ 965 if (prefix == patternlen) { 966 if (patternlen == basenamelen && 967 !fspathncmp(pattern, basename, basenamelen)) 968 return 1; 969 } else if (flags & EXC_FLAG_ENDSWITH) { 970 /* "*literal" matching against "fooliteral" */ 971 if (patternlen - 1 <= basenamelen && 972 !fspathncmp(pattern + 1, 973 basename + basenamelen - (patternlen - 1), 974 patternlen - 1)) 975 return 1; 976 } else { 977 if (fnmatch_icase_mem(pattern, patternlen, 978 basename, basenamelen, 979 0) == 0) 980 return 1; 981 } 982 return 0; 983} 984 985int match_pathname(const char *pathname, int pathlen, 986 const char *base, int baselen, 987 const char *pattern, int prefix, int patternlen, 988 unsigned flags) 989{ 990 const char *name; 991 int namelen; 992 993 /* 994 * match with FNM_PATHNAME; the pattern has base implicitly 995 * in front of it. 996 */ 997 if (*pattern == '/') { 998 pattern++; 999 patternlen--;1000 prefix--;1001 }10021003 /*1004 * baselen does not count the trailing slash. base[] may or1005 * may not end with a trailing slash though.1006 */1007 if (pathlen < baselen + 1 ||1008 (baselen && pathname[baselen] != '/') ||1009 fspathncmp(pathname, base, baselen))1010 return 0;10111012 namelen = baselen ? pathlen - baselen - 1 : pathlen;1013 name = pathname + pathlen - namelen;10141015 if (prefix) {1016 /*1017 * if the non-wildcard part is longer than the1018 * remaining pathname, surely it cannot match.1019 */1020 if (prefix > namelen)1021 return 0;10221023 if (fspathncmp(pattern, name, prefix))1024 return 0;1025 pattern += prefix;1026 patternlen -= prefix;1027 name += prefix;1028 namelen -= prefix;10291030 /*1031 * If the whole pattern did not have a wildcard,1032 * then our prefix match is all we need; we1033 * do not need to call fnmatch at all.1034 */1035 if (!patternlen && !namelen)1036 return 1;1037 }10381039 return fnmatch_icase_mem(pattern, patternlen,1040 name, namelen,1041 WM_PATHNAME) == 0;1042}10431044/*1045 * Scan the given exclude list in reverse to see whether pathname1046 * should be ignored. The first match (i.e. the last on the list), if1047 * any, determines the fate. Returns the exclude_list element which1048 * matched, or NULL for undecided.1049 */1050static struct exclude *last_exclude_matching_from_list(const char *pathname,1051 int pathlen,1052 const char *basename,1053 int *dtype,1054 struct exclude_list *el,1055 struct index_state *istate)1056{1057 struct exclude *exc = NULL; /* undecided */1058 int i;10591060 if (!el->nr)1061 return NULL; /* undefined */10621063 for (i = el->nr - 1; 0 <= i; i--) {1064 struct exclude *x = el->excludes[i];1065 const char *exclude = x->pattern;1066 int prefix = x->nowildcardlen;10671068 if (x->flags & EXC_FLAG_MUSTBEDIR) {1069 if (*dtype == DT_UNKNOWN)1070 *dtype = get_dtype(NULL, istate, pathname, pathlen);1071 if (*dtype != DT_DIR)1072 continue;1073 }10741075 if (x->flags & EXC_FLAG_NODIR) {1076 if (match_basename(basename,1077 pathlen - (basename - pathname),1078 exclude, prefix, x->patternlen,1079 x->flags)) {1080 exc = x;1081 break;1082 }1083 continue;1084 }10851086 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');1087 if (match_pathname(pathname, pathlen,1088 x->base, x->baselen ? x->baselen - 1 : 0,1089 exclude, prefix, x->patternlen, x->flags)) {1090 exc = x;1091 break;1092 }1093 }1094 return exc;1095}10961097/*1098 * Scan the list and let the last match determine the fate.1099 * Return 1 for exclude, 0 for include and -1 for undecided.1100 */1101int is_excluded_from_list(const char *pathname,1102 int pathlen, const char *basename, int *dtype,1103 struct exclude_list *el, struct index_state *istate)1104{1105 struct exclude *exclude;1106 exclude = last_exclude_matching_from_list(pathname, pathlen, basename,1107 dtype, el, istate);1108 if (exclude)1109 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1110 return -1; /* undecided */1111}11121113static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,1114 struct index_state *istate,1115 const char *pathname, int pathlen, const char *basename,1116 int *dtype_p)1117{1118 int i, j;1119 struct exclude_list_group *group;1120 struct exclude *exclude;1121 for (i = EXC_CMDL; i <= EXC_FILE; i++) {1122 group = &dir->exclude_list_group[i];1123 for (j = group->nr - 1; j >= 0; j--) {1124 exclude = last_exclude_matching_from_list(1125 pathname, pathlen, basename, dtype_p,1126 &group->el[j], istate);1127 if (exclude)1128 return exclude;1129 }1130 }1131 return NULL;1132}11331134/*1135 * Loads the per-directory exclude list for the substring of base1136 * which has a char length of baselen.1137 */1138static void prep_exclude(struct dir_struct *dir,1139 struct index_state *istate,1140 const char *base, int baselen)1141{1142 struct exclude_list_group *group;1143 struct exclude_list *el;1144 struct exclude_stack *stk = NULL;1145 struct untracked_cache_dir *untracked;1146 int current;11471148 group = &dir->exclude_list_group[EXC_DIRS];11491150 /*1151 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1152 * which originate from directories not in the prefix of the1153 * path being checked.1154 */1155 while ((stk = dir->exclude_stack) != NULL) {1156 if (stk->baselen <= baselen &&1157 !strncmp(dir->basebuf.buf, base, stk->baselen))1158 break;1159 el = &group->el[dir->exclude_stack->exclude_ix];1160 dir->exclude_stack = stk->prev;1161 dir->exclude = NULL;1162 free((char *)el->src); /* see strbuf_detach() below */1163 clear_exclude_list(el);1164 free(stk);1165 group->nr--;1166 }11671168 /* Skip traversing into sub directories if the parent is excluded */1169 if (dir->exclude)1170 return;11711172 /*1173 * Lazy initialization. All call sites currently just1174 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1175 * them seems lots of work for little benefit.1176 */1177 if (!dir->basebuf.buf)1178 strbuf_init(&dir->basebuf, PATH_MAX);11791180 /* Read from the parent directories and push them down. */1181 current = stk ? stk->baselen : -1;1182 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);1183 if (dir->untracked)1184 untracked = stk ? stk->ucd : dir->untracked->root;1185 else1186 untracked = NULL;11871188 while (current < baselen) {1189 const char *cp;1190 struct oid_stat oid_stat;11911192 stk = xcalloc(1, sizeof(*stk));1193 if (current < 0) {1194 cp = base;1195 current = 0;1196 } else {1197 cp = strchr(base + current + 1, '/');1198 if (!cp)1199 die("oops in prep_exclude");1200 cp++;1201 untracked =1202 lookup_untracked(dir->untracked, untracked,1203 base + current,1204 cp - base - current);1205 }1206 stk->prev = dir->exclude_stack;1207 stk->baselen = cp - base;1208 stk->exclude_ix = group->nr;1209 stk->ucd = untracked;1210 el = add_exclude_list(dir, EXC_DIRS, NULL);1211 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1212 assert(stk->baselen == dir->basebuf.len);12131214 /* Abort if the directory is excluded */1215 if (stk->baselen) {1216 int dt = DT_DIR;1217 dir->basebuf.buf[stk->baselen - 1] = 0;1218 dir->exclude = last_exclude_matching_from_lists(dir,1219 istate,1220 dir->basebuf.buf, stk->baselen - 1,1221 dir->basebuf.buf + current, &dt);1222 dir->basebuf.buf[stk->baselen - 1] = '/';1223 if (dir->exclude &&1224 dir->exclude->flags & EXC_FLAG_NEGATIVE)1225 dir->exclude = NULL;1226 if (dir->exclude) {1227 dir->exclude_stack = stk;1228 return;1229 }1230 }12311232 /* Try to read per-directory file */1233 oidclr(&oid_stat.oid);1234 oid_stat.valid = 0;1235 if (dir->exclude_per_dir &&1236 /*1237 * If we know that no files have been added in1238 * this directory (i.e. valid_cached_dir() has1239 * been executed and set untracked->valid) ..1240 */1241 (!untracked || !untracked->valid ||1242 /*1243 * .. and .gitignore does not exist before1244 * (i.e. null exclude_oid). Then we can skip1245 * loading .gitignore, which would result in1246 * ENOENT anyway.1247 */1248 !is_null_oid(&untracked->exclude_oid))) {1249 /*1250 * dir->basebuf gets reused by the traversal, but we1251 * need fname to remain unchanged to ensure the src1252 * member of each struct exclude correctly1253 * back-references its source file. Other invocations1254 * of add_exclude_list provide stable strings, so we1255 * strbuf_detach() and free() here in the caller.1256 */1257 struct strbuf sb = STRBUF_INIT;1258 strbuf_addbuf(&sb, &dir->basebuf);1259 strbuf_addstr(&sb, dir->exclude_per_dir);1260 el->src = strbuf_detach(&sb, NULL);1261 add_excludes(el->src, el->src, stk->baselen, el, istate,1262 untracked ? &oid_stat : NULL);1263 }1264 /*1265 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1266 * will first be called in valid_cached_dir() then maybe many1267 * times more in last_exclude_matching(). When the cache is1268 * used, last_exclude_matching() will not be called and1269 * reading .gitignore content will be a waste.1270 *1271 * So when it's called by valid_cached_dir() and we can get1272 * .gitignore SHA-1 from the index (i.e. .gitignore is not1273 * modified on work tree), we could delay reading the1274 * .gitignore content until we absolutely need it in1275 * last_exclude_matching(). Be careful about ignore rule1276 * order, though, if you do that.1277 */1278 if (untracked &&1279 oidcmp(&oid_stat.oid, &untracked->exclude_oid)) {1280 invalidate_gitignore(dir->untracked, untracked);1281 oidcpy(&untracked->exclude_oid, &oid_stat.oid);1282 }1283 dir->exclude_stack = stk;1284 current = stk->baselen;1285 }1286 strbuf_setlen(&dir->basebuf, baselen);1287}12881289/*1290 * Loads the exclude lists for the directory containing pathname, then1291 * scans all exclude lists to determine whether pathname is excluded.1292 * Returns the exclude_list element which matched, or NULL for1293 * undecided.1294 */1295struct exclude *last_exclude_matching(struct dir_struct *dir,1296 struct index_state *istate,1297 const char *pathname,1298 int *dtype_p)1299{1300 int pathlen = strlen(pathname);1301 const char *basename = strrchr(pathname, '/');1302 basename = (basename) ? basename+1 : pathname;13031304 prep_exclude(dir, istate, pathname, basename-pathname);13051306 if (dir->exclude)1307 return dir->exclude;13081309 return last_exclude_matching_from_lists(dir, istate, pathname, pathlen,1310 basename, dtype_p);1311}13121313/*1314 * Loads the exclude lists for the directory containing pathname, then1315 * scans all exclude lists to determine whether pathname is excluded.1316 * Returns 1 if true, otherwise 0.1317 */1318int is_excluded(struct dir_struct *dir, struct index_state *istate,1319 const char *pathname, int *dtype_p)1320{1321 struct exclude *exclude =1322 last_exclude_matching(dir, istate, pathname, dtype_p);1323 if (exclude)1324 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1325 return 0;1326}13271328static struct dir_entry *dir_entry_new(const char *pathname, int len)1329{1330 struct dir_entry *ent;13311332 FLEX_ALLOC_MEM(ent, name, pathname, len);1333 ent->len = len;1334 return ent;1335}13361337static struct dir_entry *dir_add_name(struct dir_struct *dir,1338 struct index_state *istate,1339 const char *pathname, int len)1340{1341 if (index_file_exists(istate, pathname, len, ignore_case))1342 return NULL;13431344 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1345 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);1346}13471348struct dir_entry *dir_add_ignored(struct dir_struct *dir,1349 struct index_state *istate,1350 const char *pathname, int len)1351{1352 if (!index_name_is_other(istate, pathname, len))1353 return NULL;13541355 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1356 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);1357}13581359enum exist_status {1360 index_nonexistent = 0,1361 index_directory,1362 index_gitdir1363};13641365/*1366 * Do not use the alphabetically sorted index to look up1367 * the directory name; instead, use the case insensitive1368 * directory hash.1369 */1370static enum exist_status directory_exists_in_index_icase(struct index_state *istate,1371 const char *dirname, int len)1372{1373 struct cache_entry *ce;13741375 if (index_dir_exists(istate, dirname, len))1376 return index_directory;13771378 ce = index_file_exists(istate, dirname, len, ignore_case);1379 if (ce && S_ISGITLINK(ce->ce_mode))1380 return index_gitdir;13811382 return index_nonexistent;1383}13841385/*1386 * The index sorts alphabetically by entry name, which1387 * means that a gitlink sorts as '\0' at the end, while1388 * a directory (which is defined not as an entry, but as1389 * the files it contains) will sort with the '/' at the1390 * end.1391 */1392static enum exist_status directory_exists_in_index(struct index_state *istate,1393 const char *dirname, int len)1394{1395 int pos;13961397 if (ignore_case)1398 return directory_exists_in_index_icase(istate, dirname, len);13991400 pos = index_name_pos(istate, dirname, len);1401 if (pos < 0)1402 pos = -pos-1;1403 while (pos < istate->cache_nr) {1404 const struct cache_entry *ce = istate->cache[pos++];1405 unsigned char endchar;14061407 if (strncmp(ce->name, dirname, len))1408 break;1409 endchar = ce->name[len];1410 if (endchar > '/')1411 break;1412 if (endchar == '/')1413 return index_directory;1414 if (!endchar && S_ISGITLINK(ce->ce_mode))1415 return index_gitdir;1416 }1417 return index_nonexistent;1418}14191420/*1421 * When we find a directory when traversing the filesystem, we1422 * have three distinct cases:1423 *1424 * - ignore it1425 * - see it as a directory1426 * - recurse into it1427 *1428 * and which one we choose depends on a combination of existing1429 * git index contents and the flags passed into the directory1430 * traversal routine.1431 *1432 * Case 1: If we *already* have entries in the index under that1433 * directory name, we always recurse into the directory to see1434 * all the files.1435 *1436 * Case 2: If we *already* have that directory name as a gitlink,1437 * we always continue to see it as a gitlink, regardless of whether1438 * there is an actual git directory there or not (it might not1439 * be checked out as a subproject!)1440 *1441 * Case 3: if we didn't have it in the index previously, we1442 * have a few sub-cases:1443 *1444 * (a) if "show_other_directories" is true, we show it as1445 * just a directory, unless "hide_empty_directories" is1446 * also true, in which case we need to check if it contains any1447 * untracked and / or ignored files.1448 * (b) if it looks like a git directory, and we don't have1449 * 'no_gitlinks' set we treat it as a gitlink, and show it1450 * as a directory.1451 * (c) otherwise, we recurse into it.1452 */1453static enum path_treatment treat_directory(struct dir_struct *dir,1454 struct index_state *istate,1455 struct untracked_cache_dir *untracked,1456 const char *dirname, int len, int baselen, int exclude,1457 const struct pathspec *pathspec)1458{1459 /* The "len-1" is to strip the final '/' */1460 switch (directory_exists_in_index(istate, dirname, len-1)) {1461 case index_directory:1462 return path_recurse;14631464 case index_gitdir:1465 return path_none;14661467 case index_nonexistent:1468 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1469 break;1470 if (exclude &&1471 (dir->flags & DIR_SHOW_IGNORED_TOO) &&1472 (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {14731474 /*1475 * This is an excluded directory and we are1476 * showing ignored paths that match an exclude1477 * pattern. (e.g. show directory as ignored1478 * only if it matches an exclude pattern).1479 * This path will either be 'path_excluded`1480 * (if we are showing empty directories or if1481 * the directory is not empty), or will be1482 * 'path_none' (empty directory, and we are1483 * not showing empty directories).1484 */1485 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1486 return path_excluded;14871488 if (read_directory_recursive(dir, istate, dirname, len,1489 untracked, 1, 1, pathspec) == path_excluded)1490 return path_excluded;14911492 return path_none;1493 }1494 if (!(dir->flags & DIR_NO_GITLINKS)) {1495 struct object_id oid;1496 if (resolve_gitlink_ref(dirname, "HEAD", &oid) == 0)1497 return exclude ? path_excluded : path_untracked;1498 }1499 return path_recurse;1500 }15011502 /* This is the "show_other_directories" case */15031504 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1505 return exclude ? path_excluded : path_untracked;15061507 untracked = lookup_untracked(dir->untracked, untracked,1508 dirname + baselen, len - baselen);15091510 /*1511 * If this is an excluded directory, then we only need to check if1512 * the directory contains any files.1513 */1514 return read_directory_recursive(dir, istate, dirname, len,1515 untracked, 1, exclude, pathspec);1516}15171518/*1519 * This is an inexact early pruning of any recursive directory1520 * reading - if the path cannot possibly be in the pathspec,1521 * return true, and we'll skip it early.1522 */1523static int simplify_away(const char *path, int pathlen,1524 const struct pathspec *pathspec)1525{1526 int i;15271528 if (!pathspec || !pathspec->nr)1529 return 0;15301531 GUARD_PATHSPEC(pathspec,1532 PATHSPEC_FROMTOP |1533 PATHSPEC_MAXDEPTH |1534 PATHSPEC_LITERAL |1535 PATHSPEC_GLOB |1536 PATHSPEC_ICASE |1537 PATHSPEC_EXCLUDE |1538 PATHSPEC_ATTR);15391540 for (i = 0; i < pathspec->nr; i++) {1541 const struct pathspec_item *item = &pathspec->items[i];1542 int len = item->nowildcard_len;15431544 if (len > pathlen)1545 len = pathlen;1546 if (!ps_strncmp(item, item->match, path, len))1547 return 0;1548 }15491550 return 1;1551}15521553/*1554 * This function tells us whether an excluded path matches a1555 * list of "interesting" pathspecs. That is, whether a path matched1556 * by any of the pathspecs could possibly be ignored by excluding1557 * the specified path. This can happen if:1558 *1559 * 1. the path is mentioned explicitly in the pathspec1560 *1561 * 2. the path is a directory prefix of some element in the1562 * pathspec1563 */1564static int exclude_matches_pathspec(const char *path, int pathlen,1565 const struct pathspec *pathspec)1566{1567 int i;15681569 if (!pathspec || !pathspec->nr)1570 return 0;15711572 GUARD_PATHSPEC(pathspec,1573 PATHSPEC_FROMTOP |1574 PATHSPEC_MAXDEPTH |1575 PATHSPEC_LITERAL |1576 PATHSPEC_GLOB |1577 PATHSPEC_ICASE |1578 PATHSPEC_EXCLUDE);15791580 for (i = 0; i < pathspec->nr; i++) {1581 const struct pathspec_item *item = &pathspec->items[i];1582 int len = item->nowildcard_len;15831584 if (len == pathlen &&1585 !ps_strncmp(item, item->match, path, pathlen))1586 return 1;1587 if (len > pathlen &&1588 item->match[pathlen] == '/' &&1589 !ps_strncmp(item, item->match, path, pathlen))1590 return 1;1591 }1592 return 0;1593}15941595static int get_index_dtype(struct index_state *istate,1596 const char *path, int len)1597{1598 int pos;1599 const struct cache_entry *ce;16001601 ce = index_file_exists(istate, path, len, 0);1602 if (ce) {1603 if (!ce_uptodate(ce))1604 return DT_UNKNOWN;1605 if (S_ISGITLINK(ce->ce_mode))1606 return DT_DIR;1607 /*1608 * Nobody actually cares about the1609 * difference between DT_LNK and DT_REG1610 */1611 return DT_REG;1612 }16131614 /* Try to look it up as a directory */1615 pos = index_name_pos(istate, path, len);1616 if (pos >= 0)1617 return DT_UNKNOWN;1618 pos = -pos-1;1619 while (pos < istate->cache_nr) {1620 ce = istate->cache[pos++];1621 if (strncmp(ce->name, path, len))1622 break;1623 if (ce->name[len] > '/')1624 break;1625 if (ce->name[len] < '/')1626 continue;1627 if (!ce_uptodate(ce))1628 break; /* continue? */1629 return DT_DIR;1630 }1631 return DT_UNKNOWN;1632}16331634static int get_dtype(struct dirent *de, struct index_state *istate,1635 const char *path, int len)1636{1637 int dtype = de ? DTYPE(de) : DT_UNKNOWN;1638 struct stat st;16391640 if (dtype != DT_UNKNOWN)1641 return dtype;1642 dtype = get_index_dtype(istate, path, len);1643 if (dtype != DT_UNKNOWN)1644 return dtype;1645 if (lstat(path, &st))1646 return dtype;1647 if (S_ISREG(st.st_mode))1648 return DT_REG;1649 if (S_ISDIR(st.st_mode))1650 return DT_DIR;1651 if (S_ISLNK(st.st_mode))1652 return DT_LNK;1653 return dtype;1654}16551656static enum path_treatment treat_one_path(struct dir_struct *dir,1657 struct untracked_cache_dir *untracked,1658 struct index_state *istate,1659 struct strbuf *path,1660 int baselen,1661 const struct pathspec *pathspec,1662 int dtype, struct dirent *de)1663{1664 int exclude;1665 int has_path_in_index = !!index_file_exists(istate, path->buf, path->len, ignore_case);1666 enum path_treatment path_treatment;16671668 if (dtype == DT_UNKNOWN)1669 dtype = get_dtype(de, istate, path->buf, path->len);16701671 /* Always exclude indexed files */1672 if (dtype != DT_DIR && has_path_in_index)1673 return path_none;16741675 /*1676 * When we are looking at a directory P in the working tree,1677 * there are three cases:1678 *1679 * (1) P exists in the index. Everything inside the directory P in1680 * the working tree needs to go when P is checked out from the1681 * index.1682 *1683 * (2) P does not exist in the index, but there is P/Q in the index.1684 * We know P will stay a directory when we check out the contents1685 * of the index, but we do not know yet if there is a directory1686 * P/Q in the working tree to be killed, so we need to recurse.1687 *1688 * (3) P does not exist in the index, and there is no P/Q in the index1689 * to require P to be a directory, either. Only in this case, we1690 * know that everything inside P will not be killed without1691 * recursing.1692 */1693 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1694 (dtype == DT_DIR) &&1695 !has_path_in_index &&1696 (directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent))1697 return path_none;16981699 exclude = is_excluded(dir, istate, path->buf, &dtype);17001701 /*1702 * Excluded? If we don't explicitly want to show1703 * ignored files, ignore it1704 */1705 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1706 return path_excluded;17071708 switch (dtype) {1709 default:1710 return path_none;1711 case DT_DIR:1712 strbuf_addch(path, '/');1713 path_treatment = treat_directory(dir, istate, untracked,1714 path->buf, path->len,1715 baselen, exclude, pathspec);1716 /*1717 * If 1) we only want to return directories that1718 * match an exclude pattern and 2) this directory does1719 * not match an exclude pattern but all of its1720 * contents are excluded, then indicate that we should1721 * recurse into this directory (instead of marking the1722 * directory itself as an ignored path).1723 */1724 if (!exclude &&1725 path_treatment == path_excluded &&1726 (dir->flags & DIR_SHOW_IGNORED_TOO) &&1727 (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING))1728 return path_recurse;1729 return path_treatment;1730 case DT_REG:1731 case DT_LNK:1732 return exclude ? path_excluded : path_untracked;1733 }1734}17351736static enum path_treatment treat_path_fast(struct dir_struct *dir,1737 struct untracked_cache_dir *untracked,1738 struct cached_dir *cdir,1739 struct index_state *istate,1740 struct strbuf *path,1741 int baselen,1742 const struct pathspec *pathspec)1743{1744 strbuf_setlen(path, baselen);1745 if (!cdir->ucd) {1746 strbuf_addstr(path, cdir->file);1747 return path_untracked;1748 }1749 strbuf_addstr(path, cdir->ucd->name);1750 /* treat_one_path() does this before it calls treat_directory() */1751 strbuf_complete(path, '/');1752 if (cdir->ucd->check_only)1753 /*1754 * check_only is set as a result of treat_directory() getting1755 * to its bottom. Verify again the same set of directories1756 * with check_only set.1757 */1758 return read_directory_recursive(dir, istate, path->buf, path->len,1759 cdir->ucd, 1, 0, pathspec);1760 /*1761 * We get path_recurse in the first run when1762 * directory_exists_in_index() returns index_nonexistent. We1763 * are sure that new changes in the index does not impact the1764 * outcome. Return now.1765 */1766 return path_recurse;1767}17681769static enum path_treatment treat_path(struct dir_struct *dir,1770 struct untracked_cache_dir *untracked,1771 struct cached_dir *cdir,1772 struct index_state *istate,1773 struct strbuf *path,1774 int baselen,1775 const struct pathspec *pathspec)1776{1777 int dtype;1778 struct dirent *de = cdir->de;17791780 if (!de)1781 return treat_path_fast(dir, untracked, cdir, istate, path,1782 baselen, pathspec);1783 if (is_dot_or_dotdot(de->d_name) || !fspathcmp(de->d_name, ".git"))1784 return path_none;1785 strbuf_setlen(path, baselen);1786 strbuf_addstr(path, de->d_name);1787 if (simplify_away(path->buf, path->len, pathspec))1788 return path_none;17891790 dtype = DTYPE(de);1791 return treat_one_path(dir, untracked, istate, path, baselen, pathspec, dtype, de);1792}17931794static void add_untracked(struct untracked_cache_dir *dir, const char *name)1795{1796 if (!dir)1797 return;1798 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,1799 dir->untracked_alloc);1800 dir->untracked[dir->untracked_nr++] = xstrdup(name);1801}18021803static int valid_cached_dir(struct dir_struct *dir,1804 struct untracked_cache_dir *untracked,1805 struct index_state *istate,1806 struct strbuf *path,1807 int check_only)1808{1809 struct stat st;18101811 if (!untracked)1812 return 0;18131814 /*1815 * With fsmonitor, we can trust the untracked cache's valid field.1816 */1817 refresh_fsmonitor(istate);1818 if (!(dir->untracked->use_fsmonitor && untracked->valid)) {1819 if (lstat(path->len ? path->buf : ".", &st)) {1820 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));1821 return 0;1822 }1823 if (!untracked->valid ||1824 match_stat_data_racy(istate, &untracked->stat_data, &st)) {1825 fill_stat_data(&untracked->stat_data, &st);1826 return 0;1827 }1828 }18291830 if (untracked->check_only != !!check_only)1831 return 0;18321833 /*1834 * prep_exclude will be called eventually on this directory,1835 * but it's called much later in last_exclude_matching(). We1836 * need it now to determine the validity of the cache for this1837 * path. The next calls will be nearly no-op, the way1838 * prep_exclude() is designed.1839 */1840 if (path->len && path->buf[path->len - 1] != '/') {1841 strbuf_addch(path, '/');1842 prep_exclude(dir, istate, path->buf, path->len);1843 strbuf_setlen(path, path->len - 1);1844 } else1845 prep_exclude(dir, istate, path->buf, path->len);18461847 /* hopefully prep_exclude() haven't invalidated this entry... */1848 return untracked->valid;1849}18501851static int open_cached_dir(struct cached_dir *cdir,1852 struct dir_struct *dir,1853 struct untracked_cache_dir *untracked,1854 struct index_state *istate,1855 struct strbuf *path,1856 int check_only)1857{1858 const char *c_path;18591860 memset(cdir, 0, sizeof(*cdir));1861 cdir->untracked = untracked;1862 if (valid_cached_dir(dir, untracked, istate, path, check_only))1863 return 0;1864 c_path = path->len ? path->buf : ".";1865 cdir->fdir = opendir(c_path);1866 if (!cdir->fdir)1867 warning_errno(_("could not open directory '%s'"), c_path);1868 if (dir->untracked) {1869 invalidate_directory(dir->untracked, untracked);1870 dir->untracked->dir_opened++;1871 }1872 if (!cdir->fdir)1873 return -1;1874 return 0;1875}18761877static int read_cached_dir(struct cached_dir *cdir)1878{1879 if (cdir->fdir) {1880 cdir->de = readdir(cdir->fdir);1881 if (!cdir->de)1882 return -1;1883 return 0;1884 }1885 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {1886 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1887 if (!d->recurse) {1888 cdir->nr_dirs++;1889 continue;1890 }1891 cdir->ucd = d;1892 cdir->nr_dirs++;1893 return 0;1894 }1895 cdir->ucd = NULL;1896 if (cdir->nr_files < cdir->untracked->untracked_nr) {1897 struct untracked_cache_dir *d = cdir->untracked;1898 cdir->file = d->untracked[cdir->nr_files++];1899 return 0;1900 }1901 return -1;1902}19031904static void close_cached_dir(struct cached_dir *cdir)1905{1906 if (cdir->fdir)1907 closedir(cdir->fdir);1908 /*1909 * We have gone through this directory and found no untracked1910 * entries. Mark it valid.1911 */1912 if (cdir->untracked) {1913 cdir->untracked->valid = 1;1914 cdir->untracked->recurse = 1;1915 }1916}19171918/*1919 * Read a directory tree. We currently ignore anything but1920 * directories, regular files and symlinks. That's because git1921 * doesn't handle them at all yet. Maybe that will change some1922 * day.1923 *1924 * Also, we ignore the name ".git" (even if it is not a directory).1925 * That likely will not change.1926 *1927 * If 'stop_at_first_file' is specified, 'path_excluded' is returned1928 * to signal that a file was found. This is the least significant value that1929 * indicates that a file was encountered that does not depend on the order of1930 * whether an untracked or exluded path was encountered first.1931 *1932 * Returns the most significant path_treatment value encountered in the scan.1933 * If 'stop_at_first_file' is specified, `path_excluded` is the most1934 * significant path_treatment value that will be returned.1935 */19361937static enum path_treatment read_directory_recursive(struct dir_struct *dir,1938 struct index_state *istate, const char *base, int baselen,1939 struct untracked_cache_dir *untracked, int check_only,1940 int stop_at_first_file, const struct pathspec *pathspec)1941{1942 struct cached_dir cdir;1943 enum path_treatment state, subdir_state, dir_state = path_none;1944 struct strbuf path = STRBUF_INIT;19451946 strbuf_add(&path, base, baselen);19471948 if (open_cached_dir(&cdir, dir, untracked, istate, &path, check_only))1949 goto out;19501951 if (untracked)1952 untracked->check_only = !!check_only;19531954 while (!read_cached_dir(&cdir)) {1955 /* check how the file or directory should be treated */1956 state = treat_path(dir, untracked, &cdir, istate, &path,1957 baselen, pathspec);19581959 if (state > dir_state)1960 dir_state = state;19611962 /* recurse into subdir if instructed by treat_path */1963 if ((state == path_recurse) ||1964 ((state == path_untracked) &&1965 (dir->flags & DIR_SHOW_IGNORED_TOO) &&1966 (get_dtype(cdir.de, istate, path.buf, path.len) == DT_DIR))) {1967 struct untracked_cache_dir *ud;1968 ud = lookup_untracked(dir->untracked, untracked,1969 path.buf + baselen,1970 path.len - baselen);1971 subdir_state =1972 read_directory_recursive(dir, istate, path.buf,1973 path.len, ud,1974 check_only, stop_at_first_file, pathspec);1975 if (subdir_state > dir_state)1976 dir_state = subdir_state;1977 }19781979 if (check_only) {1980 if (stop_at_first_file) {1981 /*1982 * If stopping at first file, then1983 * signal that a file was found by1984 * returning `path_excluded`. This is1985 * to return a consistent value1986 * regardless of whether an ignored or1987 * excluded file happened to be1988 * encountered 1st.1989 *1990 * In current usage, the1991 * `stop_at_first_file` is passed when1992 * an ancestor directory has matched1993 * an exclude pattern, so any found1994 * files will be excluded.1995 */1996 if (dir_state >= path_excluded) {1997 dir_state = path_excluded;1998 break;1999 }2000 }20012002 /* abort early if maximum state has been reached */2003 if (dir_state == path_untracked) {2004 if (cdir.fdir)2005 add_untracked(untracked, path.buf + baselen);2006 break;2007 }2008 /* skip the dir_add_* part */2009 continue;2010 }20112012 /* add the path to the appropriate result list */2013 switch (state) {2014 case path_excluded:2015 if (dir->flags & DIR_SHOW_IGNORED)2016 dir_add_name(dir, istate, path.buf, path.len);2017 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||2018 ((dir->flags & DIR_COLLECT_IGNORED) &&2019 exclude_matches_pathspec(path.buf, path.len,2020 pathspec)))2021 dir_add_ignored(dir, istate, path.buf, path.len);2022 break;20232024 case path_untracked:2025 if (dir->flags & DIR_SHOW_IGNORED)2026 break;2027 dir_add_name(dir, istate, path.buf, path.len);2028 if (cdir.fdir)2029 add_untracked(untracked, path.buf + baselen);2030 break;20312032 default:2033 break;2034 }2035 }2036 close_cached_dir(&cdir);2037 out:2038 strbuf_release(&path);20392040 return dir_state;2041}20422043int cmp_dir_entry(const void *p1, const void *p2)2044{2045 const struct dir_entry *e1 = *(const struct dir_entry **)p1;2046 const struct dir_entry *e2 = *(const struct dir_entry **)p2;20472048 return name_compare(e1->name, e1->len, e2->name, e2->len);2049}20502051/* check if *out lexically strictly contains *in */2052int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in)2053{2054 return (out->len < in->len) &&2055 (out->name[out->len - 1] == '/') &&2056 !memcmp(out->name, in->name, out->len);2057}20582059static int treat_leading_path(struct dir_struct *dir,2060 struct index_state *istate,2061 const char *path, int len,2062 const struct pathspec *pathspec)2063{2064 struct strbuf sb = STRBUF_INIT;2065 int baselen, rc = 0;2066 const char *cp;2067 int old_flags = dir->flags;20682069 while (len && path[len - 1] == '/')2070 len--;2071 if (!len)2072 return 1;2073 baselen = 0;2074 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;2075 while (1) {2076 cp = path + baselen + !!baselen;2077 cp = memchr(cp, '/', path + len - cp);2078 if (!cp)2079 baselen = len;2080 else2081 baselen = cp - path;2082 strbuf_setlen(&sb, 0);2083 strbuf_add(&sb, path, baselen);2084 if (!is_directory(sb.buf))2085 break;2086 if (simplify_away(sb.buf, sb.len, pathspec))2087 break;2088 if (treat_one_path(dir, NULL, istate, &sb, baselen, pathspec,2089 DT_DIR, NULL) == path_none)2090 break; /* do not recurse into it */2091 if (len <= baselen) {2092 rc = 1;2093 break; /* finished checking */2094 }2095 }2096 strbuf_release(&sb);2097 dir->flags = old_flags;2098 return rc;2099}21002101static const char *get_ident_string(void)2102{2103 static struct strbuf sb = STRBUF_INIT;2104 struct utsname uts;21052106 if (sb.len)2107 return sb.buf;2108 if (uname(&uts) < 0)2109 die_errno(_("failed to get kernel name and information"));2110 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),2111 uts.sysname);2112 return sb.buf;2113}21142115static int ident_in_untracked(const struct untracked_cache *uc)2116{2117 /*2118 * Previous git versions may have saved many NUL separated2119 * strings in the "ident" field, but it is insane to manage2120 * many locations, so just take care of the first one.2121 */21222123 return !strcmp(uc->ident.buf, get_ident_string());2124}21252126static void set_untracked_ident(struct untracked_cache *uc)2127{2128 strbuf_reset(&uc->ident);2129 strbuf_addstr(&uc->ident, get_ident_string());21302131 /*2132 * This strbuf used to contain a list of NUL separated2133 * strings, so save NUL too for backward compatibility.2134 */2135 strbuf_addch(&uc->ident, 0);2136}21372138static void new_untracked_cache(struct index_state *istate)2139{2140 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));2141 strbuf_init(&uc->ident, 100);2142 uc->exclude_per_dir = ".gitignore";2143 /* should be the same flags used by git-status */2144 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;2145 set_untracked_ident(uc);2146 istate->untracked = uc;2147 istate->cache_changed |= UNTRACKED_CHANGED;2148}21492150void add_untracked_cache(struct index_state *istate)2151{2152 if (!istate->untracked) {2153 new_untracked_cache(istate);2154 } else {2155 if (!ident_in_untracked(istate->untracked)) {2156 free_untracked_cache(istate->untracked);2157 new_untracked_cache(istate);2158 }2159 }2160}21612162void remove_untracked_cache(struct index_state *istate)2163{2164 if (istate->untracked) {2165 free_untracked_cache(istate->untracked);2166 istate->untracked = NULL;2167 istate->cache_changed |= UNTRACKED_CHANGED;2168 }2169}21702171static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,2172 int base_len,2173 const struct pathspec *pathspec)2174{2175 struct untracked_cache_dir *root;2176 static int untracked_cache_disabled = -1;21772178 if (!dir->untracked)2179 return NULL;2180 if (untracked_cache_disabled < 0)2181 untracked_cache_disabled = git_env_bool("GIT_DISABLE_UNTRACKED_CACHE", 0);2182 if (untracked_cache_disabled)2183 return NULL;21842185 /*2186 * We only support $GIT_DIR/info/exclude and core.excludesfile2187 * as the global ignore rule files. Any other additions2188 * (e.g. from command line) invalidate the cache. This2189 * condition also catches running setup_standard_excludes()2190 * before setting dir->untracked!2191 */2192 if (dir->unmanaged_exclude_files)2193 return NULL;21942195 /*2196 * Optimize for the main use case only: whole-tree git2197 * status. More work involved in treat_leading_path() if we2198 * use cache on just a subset of the worktree. pathspec2199 * support could make the matter even worse.2200 */2201 if (base_len || (pathspec && pathspec->nr))2202 return NULL;22032204 /* Different set of flags may produce different results */2205 if (dir->flags != dir->untracked->dir_flags ||2206 /*2207 * See treat_directory(), case index_nonexistent. Without2208 * this flag, we may need to also cache .git file content2209 * for the resolve_gitlink_ref() call, which we don't.2210 */2211 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||2212 /* We don't support collecting ignore files */2213 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |2214 DIR_COLLECT_IGNORED)))2215 return NULL;22162217 /*2218 * If we use .gitignore in the cache and now you change it to2219 * .gitexclude, everything will go wrong.2220 */2221 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&2222 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))2223 return NULL;22242225 /*2226 * EXC_CMDL is not considered in the cache. If people set it,2227 * skip the cache.2228 */2229 if (dir->exclude_list_group[EXC_CMDL].nr)2230 return NULL;22312232 if (!ident_in_untracked(dir->untracked)) {2233 warning(_("untracked cache is disabled on this system or location"));2234 return NULL;2235 }22362237 if (!dir->untracked->root) {2238 const int len = sizeof(*dir->untracked->root);2239 dir->untracked->root = xmalloc(len);2240 memset(dir->untracked->root, 0, len);2241 }22422243 /* Validate $GIT_DIR/info/exclude and core.excludesfile */2244 root = dir->untracked->root;2245 if (oidcmp(&dir->ss_info_exclude.oid,2246 &dir->untracked->ss_info_exclude.oid)) {2247 invalidate_gitignore(dir->untracked, root);2248 dir->untracked->ss_info_exclude = dir->ss_info_exclude;2249 }2250 if (oidcmp(&dir->ss_excludes_file.oid,2251 &dir->untracked->ss_excludes_file.oid)) {2252 invalidate_gitignore(dir->untracked, root);2253 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2254 }22552256 /* Make sure this directory is not dropped out at saving phase */2257 root->recurse = 1;2258 return root;2259}22602261int read_directory(struct dir_struct *dir, struct index_state *istate,2262 const char *path, int len, const struct pathspec *pathspec)2263{2264 struct untracked_cache_dir *untracked;2265 uint64_t start = getnanotime();22662267 if (has_symlink_leading_path(path, len))2268 return dir->nr;22692270 untracked = validate_untracked_cache(dir, len, pathspec);2271 if (!untracked)2272 /*2273 * make sure untracked cache code path is disabled,2274 * e.g. prep_exclude()2275 */2276 dir->untracked = NULL;2277 if (!len || treat_leading_path(dir, istate, path, len, pathspec))2278 read_directory_recursive(dir, istate, path, len, untracked, 0, 0, pathspec);2279 QSORT(dir->entries, dir->nr, cmp_dir_entry);2280 QSORT(dir->ignored, dir->ignored_nr, cmp_dir_entry);22812282 /*2283 * If DIR_SHOW_IGNORED_TOO is set, read_directory_recursive() will2284 * also pick up untracked contents of untracked dirs; by default2285 * we discard these, but given DIR_KEEP_UNTRACKED_CONTENTS we do not.2286 */2287 if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&2288 !(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) {2289 int i, j;22902291 /* remove from dir->entries untracked contents of untracked dirs */2292 for (i = j = 0; j < dir->nr; j++) {2293 if (i &&2294 check_dir_entry_contains(dir->entries[i - 1], dir->entries[j])) {2295 FREE_AND_NULL(dir->entries[j]);2296 } else {2297 dir->entries[i++] = dir->entries[j];2298 }2299 }23002301 dir->nr = i;2302 }23032304 trace_performance_since(start, "read directory %.*s", len, path);2305 if (dir->untracked) {2306 static int force_untracked_cache = -1;2307 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);23082309 if (force_untracked_cache < 0)2310 force_untracked_cache =2311 git_env_bool("GIT_FORCE_UNTRACKED_CACHE", 0);2312 trace_printf_key(&trace_untracked_stats,2313 "node creation: %u\n"2314 "gitignore invalidation: %u\n"2315 "directory invalidation: %u\n"2316 "opendir: %u\n",2317 dir->untracked->dir_created,2318 dir->untracked->gitignore_invalidated,2319 dir->untracked->dir_invalidated,2320 dir->untracked->dir_opened);2321 if (force_untracked_cache &&2322 dir->untracked == istate->untracked &&2323 (dir->untracked->dir_opened ||2324 dir->untracked->gitignore_invalidated ||2325 dir->untracked->dir_invalidated))2326 istate->cache_changed |= UNTRACKED_CHANGED;2327 if (dir->untracked != istate->untracked) {2328 FREE_AND_NULL(dir->untracked);2329 }2330 }2331 return dir->nr;2332}23332334int file_exists(const char *f)2335{2336 struct stat sb;2337 return lstat(f, &sb) == 0;2338}23392340static int cmp_icase(char a, char b)2341{2342 if (a == b)2343 return 0;2344 if (ignore_case)2345 return toupper(a) - toupper(b);2346 return a - b;2347}23482349/*2350 * Given two normalized paths (a trailing slash is ok), if subdir is2351 * outside dir, return -1. Otherwise return the offset in subdir that2352 * can be used as relative path to dir.2353 */2354int dir_inside_of(const char *subdir, const char *dir)2355{2356 int offset = 0;23572358 assert(dir && subdir && *dir && *subdir);23592360 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {2361 dir++;2362 subdir++;2363 offset++;2364 }23652366 /* hel[p]/me vs hel[l]/yeah */2367 if (*dir && *subdir)2368 return -1;23692370 if (!*subdir)2371 return !*dir ? offset : -1; /* same dir */23722373 /* foo/[b]ar vs foo/[] */2374 if (is_dir_sep(dir[-1]))2375 return is_dir_sep(subdir[-1]) ? offset : -1;23762377 /* foo[/]bar vs foo[] */2378 return is_dir_sep(*subdir) ? offset + 1 : -1;2379}23802381int is_inside_dir(const char *dir)2382{2383 char *cwd;2384 int rc;23852386 if (!dir)2387 return 0;23882389 cwd = xgetcwd();2390 rc = (dir_inside_of(cwd, dir) >= 0);2391 free(cwd);2392 return rc;2393}23942395int is_empty_dir(const char *path)2396{2397 DIR *dir = opendir(path);2398 struct dirent *e;2399 int ret = 1;24002401 if (!dir)2402 return 0;24032404 while ((e = readdir(dir)) != NULL)2405 if (!is_dot_or_dotdot(e->d_name)) {2406 ret = 0;2407 break;2408 }24092410 closedir(dir);2411 return ret;2412}24132414static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)2415{2416 DIR *dir;2417 struct dirent *e;2418 int ret = 0, original_len = path->len, len, kept_down = 0;2419 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2420 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2421 struct object_id submodule_head;24222423 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2424 !resolve_gitlink_ref(path->buf, "HEAD", &submodule_head)) {2425 /* Do not descend and nuke a nested git work tree. */2426 if (kept_up)2427 *kept_up = 1;2428 return 0;2429 }24302431 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2432 dir = opendir(path->buf);2433 if (!dir) {2434 if (errno == ENOENT)2435 return keep_toplevel ? -1 : 0;2436 else if (errno == EACCES && !keep_toplevel)2437 /*2438 * An empty dir could be removable even if it2439 * is unreadable:2440 */2441 return rmdir(path->buf);2442 else2443 return -1;2444 }2445 strbuf_complete(path, '/');24462447 len = path->len;2448 while ((e = readdir(dir)) != NULL) {2449 struct stat st;2450 if (is_dot_or_dotdot(e->d_name))2451 continue;24522453 strbuf_setlen(path, len);2454 strbuf_addstr(path, e->d_name);2455 if (lstat(path->buf, &st)) {2456 if (errno == ENOENT)2457 /*2458 * file disappeared, which is what we2459 * wanted anyway2460 */2461 continue;2462 /* fall thru */2463 } else if (S_ISDIR(st.st_mode)) {2464 if (!remove_dir_recurse(path, flag, &kept_down))2465 continue; /* happy */2466 } else if (!only_empty &&2467 (!unlink(path->buf) || errno == ENOENT)) {2468 continue; /* happy, too */2469 }24702471 /* path too long, stat fails, or non-directory still exists */2472 ret = -1;2473 break;2474 }2475 closedir(dir);24762477 strbuf_setlen(path, original_len);2478 if (!ret && !keep_toplevel && !kept_down)2479 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;2480 else if (kept_up)2481 /*2482 * report the uplevel that it is not an error that we2483 * did not rmdir() our directory.2484 */2485 *kept_up = !ret;2486 return ret;2487}24882489int remove_dir_recursively(struct strbuf *path, int flag)2490{2491 return remove_dir_recurse(path, flag, NULL);2492}24932494static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")24952496void setup_standard_excludes(struct dir_struct *dir)2497{2498 dir->exclude_per_dir = ".gitignore";24992500 /* core.excludefile defaulting to $XDG_HOME/git/ignore */2501 if (!excludes_file)2502 excludes_file = xdg_config_home("ignore");2503 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))2504 add_excludes_from_file_1(dir, excludes_file,2505 dir->untracked ? &dir->ss_excludes_file : NULL);25062507 /* per repository user preference */2508 if (startup_info->have_repository) {2509 const char *path = git_path_info_exclude();2510 if (!access_or_warn(path, R_OK, 0))2511 add_excludes_from_file_1(dir, path,2512 dir->untracked ? &dir->ss_info_exclude : NULL);2513 }2514}25152516int remove_path(const char *name)2517{2518 char *slash;25192520 if (unlink(name) && !is_missing_file_error(errno))2521 return -1;25222523 slash = strrchr(name, '/');2524 if (slash) {2525 char *dirs = xstrdup(name);2526 slash = dirs + (slash - name);2527 do {2528 *slash = '\0';2529 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));2530 free(dirs);2531 }2532 return 0;2533}25342535/*2536 * Frees memory within dir which was allocated for exclude lists and2537 * the exclude_stack. Does not free dir itself.2538 */2539void clear_directory(struct dir_struct *dir)2540{2541 int i, j;2542 struct exclude_list_group *group;2543 struct exclude_list *el;2544 struct exclude_stack *stk;25452546 for (i = EXC_CMDL; i <= EXC_FILE; i++) {2547 group = &dir->exclude_list_group[i];2548 for (j = 0; j < group->nr; j++) {2549 el = &group->el[j];2550 if (i == EXC_DIRS)2551 free((char *)el->src);2552 clear_exclude_list(el);2553 }2554 free(group->el);2555 }25562557 stk = dir->exclude_stack;2558 while (stk) {2559 struct exclude_stack *prev = stk->prev;2560 free(stk);2561 stk = prev;2562 }2563 strbuf_release(&dir->basebuf);2564}25652566struct ondisk_untracked_cache {2567 struct stat_data info_exclude_stat;2568 struct stat_data excludes_file_stat;2569 uint32_t dir_flags;2570 unsigned char info_exclude_sha1[20];2571 unsigned char excludes_file_sha1[20];2572 char exclude_per_dir[FLEX_ARRAY];2573};25742575#define ouc_offset(x) offsetof(struct ondisk_untracked_cache, x)2576#define ouc_size(len) (ouc_offset(exclude_per_dir) + len + 1)25772578struct write_data {2579 int index; /* number of written untracked_cache_dir */2580 struct ewah_bitmap *check_only; /* from untracked_cache_dir */2581 struct ewah_bitmap *valid; /* from untracked_cache_dir */2582 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */2583 struct strbuf out;2584 struct strbuf sb_stat;2585 struct strbuf sb_sha1;2586};25872588static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)2589{2590 to->sd_ctime.sec = htonl(from->sd_ctime.sec);2591 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);2592 to->sd_mtime.sec = htonl(from->sd_mtime.sec);2593 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);2594 to->sd_dev = htonl(from->sd_dev);2595 to->sd_ino = htonl(from->sd_ino);2596 to->sd_uid = htonl(from->sd_uid);2597 to->sd_gid = htonl(from->sd_gid);2598 to->sd_size = htonl(from->sd_size);2599}26002601static void write_one_dir(struct untracked_cache_dir *untracked,2602 struct write_data *wd)2603{2604 struct stat_data stat_data;2605 struct strbuf *out = &wd->out;2606 unsigned char intbuf[16];2607 unsigned int intlen, value;2608 int i = wd->index++;26092610 /*2611 * untracked_nr should be reset whenever valid is clear, but2612 * for safety..2613 */2614 if (!untracked->valid) {2615 untracked->untracked_nr = 0;2616 untracked->check_only = 0;2617 }26182619 if (untracked->check_only)2620 ewah_set(wd->check_only, i);2621 if (untracked->valid) {2622 ewah_set(wd->valid, i);2623 stat_data_to_disk(&stat_data, &untracked->stat_data);2624 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));2625 }2626 if (!is_null_oid(&untracked->exclude_oid)) {2627 ewah_set(wd->sha1_valid, i);2628 strbuf_add(&wd->sb_sha1, untracked->exclude_oid.hash,2629 the_hash_algo->rawsz);2630 }26312632 intlen = encode_varint(untracked->untracked_nr, intbuf);2633 strbuf_add(out, intbuf, intlen);26342635 /* skip non-recurse directories */2636 for (i = 0, value = 0; i < untracked->dirs_nr; i++)2637 if (untracked->dirs[i]->recurse)2638 value++;2639 intlen = encode_varint(value, intbuf);2640 strbuf_add(out, intbuf, intlen);26412642 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);26432644 for (i = 0; i < untracked->untracked_nr; i++)2645 strbuf_add(out, untracked->untracked[i],2646 strlen(untracked->untracked[i]) + 1);26472648 for (i = 0; i < untracked->dirs_nr; i++)2649 if (untracked->dirs[i]->recurse)2650 write_one_dir(untracked->dirs[i], wd);2651}26522653void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)2654{2655 struct ondisk_untracked_cache *ouc;2656 struct write_data wd;2657 unsigned char varbuf[16];2658 int varint_len;2659 size_t len = strlen(untracked->exclude_per_dir);26602661 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);2662 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2663 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2664 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.oid.hash);2665 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.oid.hash);2666 ouc->dir_flags = htonl(untracked->dir_flags);26672668 varint_len = encode_varint(untracked->ident.len, varbuf);2669 strbuf_add(out, varbuf, varint_len);2670 strbuf_addbuf(out, &untracked->ident);26712672 strbuf_add(out, ouc, ouc_size(len));2673 FREE_AND_NULL(ouc);26742675 if (!untracked->root) {2676 varint_len = encode_varint(0, varbuf);2677 strbuf_add(out, varbuf, varint_len);2678 return;2679 }26802681 wd.index = 0;2682 wd.check_only = ewah_new();2683 wd.valid = ewah_new();2684 wd.sha1_valid = ewah_new();2685 strbuf_init(&wd.out, 1024);2686 strbuf_init(&wd.sb_stat, 1024);2687 strbuf_init(&wd.sb_sha1, 1024);2688 write_one_dir(untracked->root, &wd);26892690 varint_len = encode_varint(wd.index, varbuf);2691 strbuf_add(out, varbuf, varint_len);2692 strbuf_addbuf(out, &wd.out);2693 ewah_serialize_strbuf(wd.valid, out);2694 ewah_serialize_strbuf(wd.check_only, out);2695 ewah_serialize_strbuf(wd.sha1_valid, out);2696 strbuf_addbuf(out, &wd.sb_stat);2697 strbuf_addbuf(out, &wd.sb_sha1);2698 strbuf_addch(out, '\0'); /* safe guard for string lists */26992700 ewah_free(wd.valid);2701 ewah_free(wd.check_only);2702 ewah_free(wd.sha1_valid);2703 strbuf_release(&wd.out);2704 strbuf_release(&wd.sb_stat);2705 strbuf_release(&wd.sb_sha1);2706}27072708static void free_untracked(struct untracked_cache_dir *ucd)2709{2710 int i;2711 if (!ucd)2712 return;2713 for (i = 0; i < ucd->dirs_nr; i++)2714 free_untracked(ucd->dirs[i]);2715 for (i = 0; i < ucd->untracked_nr; i++)2716 free(ucd->untracked[i]);2717 free(ucd->untracked);2718 free(ucd->dirs);2719 free(ucd);2720}27212722void free_untracked_cache(struct untracked_cache *uc)2723{2724 if (uc)2725 free_untracked(uc->root);2726 free(uc);2727}27282729struct read_data {2730 int index;2731 struct untracked_cache_dir **ucd;2732 struct ewah_bitmap *check_only;2733 struct ewah_bitmap *valid;2734 struct ewah_bitmap *sha1_valid;2735 const unsigned char *data;2736 const unsigned char *end;2737};27382739static void stat_data_from_disk(struct stat_data *to, const unsigned char *data)2740{2741 memcpy(to, data, sizeof(*to));2742 to->sd_ctime.sec = ntohl(to->sd_ctime.sec);2743 to->sd_ctime.nsec = ntohl(to->sd_ctime.nsec);2744 to->sd_mtime.sec = ntohl(to->sd_mtime.sec);2745 to->sd_mtime.nsec = ntohl(to->sd_mtime.nsec);2746 to->sd_dev = ntohl(to->sd_dev);2747 to->sd_ino = ntohl(to->sd_ino);2748 to->sd_uid = ntohl(to->sd_uid);2749 to->sd_gid = ntohl(to->sd_gid);2750 to->sd_size = ntohl(to->sd_size);2751}27522753static int read_one_dir(struct untracked_cache_dir **untracked_,2754 struct read_data *rd)2755{2756 struct untracked_cache_dir ud, *untracked;2757 const unsigned char *next, *data = rd->data, *end = rd->end;2758 unsigned int value;2759 int i, len;27602761 memset(&ud, 0, sizeof(ud));27622763 next = data;2764 value = decode_varint(&next);2765 if (next > end)2766 return -1;2767 ud.recurse = 1;2768 ud.untracked_alloc = value;2769 ud.untracked_nr = value;2770 if (ud.untracked_nr)2771 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);2772 data = next;27732774 next = data;2775 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);2776 if (next > end)2777 return -1;2778 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);2779 data = next;27802781 len = strlen((const char *)data);2782 next = data + len + 1;2783 if (next > rd->end)2784 return -1;2785 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));2786 memcpy(untracked, &ud, sizeof(ud));2787 memcpy(untracked->name, data, len + 1);2788 data = next;27892790 for (i = 0; i < untracked->untracked_nr; i++) {2791 len = strlen((const char *)data);2792 next = data + len + 1;2793 if (next > rd->end)2794 return -1;2795 untracked->untracked[i] = xstrdup((const char*)data);2796 data = next;2797 }27982799 rd->ucd[rd->index++] = untracked;2800 rd->data = data;28012802 for (i = 0; i < untracked->dirs_nr; i++) {2803 len = read_one_dir(untracked->dirs + i, rd);2804 if (len < 0)2805 return -1;2806 }2807 return 0;2808}28092810static void set_check_only(size_t pos, void *cb)2811{2812 struct read_data *rd = cb;2813 struct untracked_cache_dir *ud = rd->ucd[pos];2814 ud->check_only = 1;2815}28162817static void read_stat(size_t pos, void *cb)2818{2819 struct read_data *rd = cb;2820 struct untracked_cache_dir *ud = rd->ucd[pos];2821 if (rd->data + sizeof(struct stat_data) > rd->end) {2822 rd->data = rd->end + 1;2823 return;2824 }2825 stat_data_from_disk(&ud->stat_data, rd->data);2826 rd->data += sizeof(struct stat_data);2827 ud->valid = 1;2828}28292830static void read_oid(size_t pos, void *cb)2831{2832 struct read_data *rd = cb;2833 struct untracked_cache_dir *ud = rd->ucd[pos];2834 if (rd->data + the_hash_algo->rawsz > rd->end) {2835 rd->data = rd->end + 1;2836 return;2837 }2838 hashcpy(ud->exclude_oid.hash, rd->data);2839 rd->data += the_hash_algo->rawsz;2840}28412842static void load_oid_stat(struct oid_stat *oid_stat, const unsigned char *data,2843 const unsigned char *sha1)2844{2845 stat_data_from_disk(&oid_stat->stat, data);2846 hashcpy(oid_stat->oid.hash, sha1);2847 oid_stat->valid = 1;2848}28492850struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)2851{2852 struct untracked_cache *uc;2853 struct read_data rd;2854 const unsigned char *next = data, *end = (const unsigned char *)data + sz;2855 const char *ident;2856 int ident_len;2857 ssize_t len;2858 const char *exclude_per_dir;28592860 if (sz <= 1 || end[-1] != '\0')2861 return NULL;2862 end--;28632864 ident_len = decode_varint(&next);2865 if (next + ident_len > end)2866 return NULL;2867 ident = (const char *)next;2868 next += ident_len;28692870 if (next + ouc_size(0) > end)2871 return NULL;28722873 uc = xcalloc(1, sizeof(*uc));2874 strbuf_init(&uc->ident, ident_len);2875 strbuf_add(&uc->ident, ident, ident_len);2876 load_oid_stat(&uc->ss_info_exclude,2877 next + ouc_offset(info_exclude_stat),2878 next + ouc_offset(info_exclude_sha1));2879 load_oid_stat(&uc->ss_excludes_file,2880 next + ouc_offset(excludes_file_stat),2881 next + ouc_offset(excludes_file_sha1));2882 uc->dir_flags = get_be32(next + ouc_offset(dir_flags));2883 exclude_per_dir = (const char *)next + ouc_offset(exclude_per_dir);2884 uc->exclude_per_dir = xstrdup(exclude_per_dir);2885 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */2886 next += ouc_size(strlen(exclude_per_dir));2887 if (next >= end)2888 goto done2;28892890 len = decode_varint(&next);2891 if (next > end || len == 0)2892 goto done2;28932894 rd.valid = ewah_new();2895 rd.check_only = ewah_new();2896 rd.sha1_valid = ewah_new();2897 rd.data = next;2898 rd.end = end;2899 rd.index = 0;2900 ALLOC_ARRAY(rd.ucd, len);29012902 if (read_one_dir(&uc->root, &rd) || rd.index != len)2903 goto done;29042905 next = rd.data;2906 len = ewah_read_mmap(rd.valid, next, end - next);2907 if (len < 0)2908 goto done;29092910 next += len;2911 len = ewah_read_mmap(rd.check_only, next, end - next);2912 if (len < 0)2913 goto done;29142915 next += len;2916 len = ewah_read_mmap(rd.sha1_valid, next, end - next);2917 if (len < 0)2918 goto done;29192920 ewah_each_bit(rd.check_only, set_check_only, &rd);2921 rd.data = next + len;2922 ewah_each_bit(rd.valid, read_stat, &rd);2923 ewah_each_bit(rd.sha1_valid, read_oid, &rd);2924 next = rd.data;29252926done:2927 free(rd.ucd);2928 ewah_free(rd.valid);2929 ewah_free(rd.check_only);2930 ewah_free(rd.sha1_valid);2931done2:2932 if (next != end) {2933 free_untracked_cache(uc);2934 uc = NULL;2935 }2936 return uc;2937}29382939static void invalidate_one_directory(struct untracked_cache *uc,2940 struct untracked_cache_dir *ucd)2941{2942 uc->dir_invalidated++;2943 ucd->valid = 0;2944 ucd->untracked_nr = 0;2945}29462947/*2948 * Normally when an entry is added or removed from a directory,2949 * invalidating that directory is enough. No need to touch its2950 * ancestors. When a directory is shown as "foo/bar/" in git-status2951 * however, deleting or adding an entry may have cascading effect.2952 *2953 * Say the "foo/bar/file" has become untracked, we need to tell the2954 * untracked_cache_dir of "foo" that "bar/" is not an untracked2955 * directory any more (because "bar" is managed by foo as an untracked2956 * "file").2957 *2958 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2959 * was the last untracked entry in the entire "foo", we should show2960 * "foo/" instead. Which means we have to invalidate past "bar" up to2961 * "foo".2962 *2963 * This function traverses all directories from root to leaf. If there2964 * is a chance of one of the above cases happening, we invalidate back2965 * to root. Otherwise we just invalidate the leaf. There may be a more2966 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2967 * detect these cases and avoid unnecessary invalidation, for example,2968 * checking for the untracked entry named "bar/" in "foo", but for now2969 * stick to something safe and simple.2970 */2971static int invalidate_one_component(struct untracked_cache *uc,2972 struct untracked_cache_dir *dir,2973 const char *path, int len)2974{2975 const char *rest = strchr(path, '/');29762977 if (rest) {2978 int component_len = rest - path;2979 struct untracked_cache_dir *d =2980 lookup_untracked(uc, dir, path, component_len);2981 int ret =2982 invalidate_one_component(uc, d, rest + 1,2983 len - (component_len + 1));2984 if (ret)2985 invalidate_one_directory(uc, dir);2986 return ret;2987 }29882989 invalidate_one_directory(uc, dir);2990 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2991}29922993void untracked_cache_invalidate_path(struct index_state *istate,2994 const char *path, int safe_path)2995{2996 if (!istate->untracked || !istate->untracked->root)2997 return;2998 if (!safe_path && !verify_path(path, 0))2999 return;3000 invalidate_one_component(istate->untracked, istate->untracked->root,3001 path, strlen(path));3002}30033004void untracked_cache_remove_from_index(struct index_state *istate,3005 const char *path)3006{3007 untracked_cache_invalidate_path(istate, path, 1);3008}30093010void untracked_cache_add_to_index(struct index_state *istate,3011 const char *path)3012{3013 untracked_cache_invalidate_path(istate, path, 1);3014}30153016static void connect_wt_gitdir_in_nested(const char *sub_worktree,3017 const char *sub_gitdir)3018{3019 int i;3020 struct repository subrepo;3021 struct strbuf sub_wt = STRBUF_INIT;3022 struct strbuf sub_gd = STRBUF_INIT;30233024 const struct submodule *sub;30253026 /* If the submodule has no working tree, we can ignore it. */3027 if (repo_init(&subrepo, sub_gitdir, sub_worktree))3028 return;30293030 if (repo_read_index(&subrepo) < 0)3031 die("index file corrupt in repo %s", subrepo.gitdir);30323033 for (i = 0; i < subrepo.index->cache_nr; i++) {3034 const struct cache_entry *ce = subrepo.index->cache[i];30353036 if (!S_ISGITLINK(ce->ce_mode))3037 continue;30383039 while (i + 1 < subrepo.index->cache_nr &&3040 !strcmp(ce->name, subrepo.index->cache[i + 1]->name))3041 /*3042 * Skip entries with the same name in different stages3043 * to make sure an entry is returned only once.3044 */3045 i++;30463047 sub = submodule_from_path(&subrepo, &null_oid, ce->name);3048 if (!sub || !is_submodule_active(&subrepo, ce->name))3049 /* .gitmodules broken or inactive sub */3050 continue;30513052 strbuf_reset(&sub_wt);3053 strbuf_reset(&sub_gd);3054 strbuf_addf(&sub_wt, "%s/%s", sub_worktree, sub->path);3055 strbuf_addf(&sub_gd, "%s/modules/%s", sub_gitdir, sub->name);30563057 connect_work_tree_and_git_dir(sub_wt.buf, sub_gd.buf, 1);3058 }3059 strbuf_release(&sub_wt);3060 strbuf_release(&sub_gd);3061 repo_clear(&subrepo);3062}30633064void connect_work_tree_and_git_dir(const char *work_tree_,3065 const char *git_dir_,3066 int recurse_into_nested)3067{3068 struct strbuf gitfile_sb = STRBUF_INIT;3069 struct strbuf cfg_sb = STRBUF_INIT;3070 struct strbuf rel_path = STRBUF_INIT;3071 char *git_dir, *work_tree;30723073 /* Prepare .git file */3074 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);3075 if (safe_create_leading_directories_const(gitfile_sb.buf))3076 die(_("could not create directories for %s"), gitfile_sb.buf);30773078 /* Prepare config file */3079 strbuf_addf(&cfg_sb, "%s/config", git_dir_);3080 if (safe_create_leading_directories_const(cfg_sb.buf))3081 die(_("could not create directories for %s"), cfg_sb.buf);30823083 git_dir = real_pathdup(git_dir_, 1);3084 work_tree = real_pathdup(work_tree_, 1);30853086 /* Write .git file */3087 write_file(gitfile_sb.buf, "gitdir: %s",3088 relative_path(git_dir, work_tree, &rel_path));3089 /* Update core.worktree setting */3090 git_config_set_in_file(cfg_sb.buf, "core.worktree",3091 relative_path(work_tree, git_dir, &rel_path));30923093 strbuf_release(&gitfile_sb);3094 strbuf_release(&cfg_sb);3095 strbuf_release(&rel_path);30963097 if (recurse_into_nested)3098 connect_wt_gitdir_in_nested(work_tree, git_dir);30993100 free(work_tree);3101 free(git_dir);3102}31033104/*3105 * Migrate the git directory of the given path from old_git_dir to new_git_dir.3106 */3107void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)3108{3109 if (rename(old_git_dir, new_git_dir) < 0)3110 die_errno(_("could not migrate git directory from '%s' to '%s'"),3111 old_git_dir, new_git_dir);31123113 connect_work_tree_and_git_dir(path, new_git_dir, 0);3114}