1/* 2 * This handles recursive filename detection with exclude 3 * files, index knowledge etc.. 4 * 5 * See Documentation/technical/api-directory-listing.txt 6 * 7 * Copyright (C) Linus Torvalds, 2005-2006 8 * Junio Hamano, 2005-2006 9 */ 10#include "cache.h" 11#include "dir.h" 12#include "refs.h" 13#include "wildmatch.h" 14#include "pathspec.h" 15#include "utf8.h" 16#include "varint.h" 17#include "ewah/ewok.h" 18 19struct path_simplify { 20 int len; 21 const char *path; 22}; 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 const char *path, int len, struct untracked_cache_dir *untracked, 53 int check_only, const struct path_simplify *simplify); 54static int get_dtype(struct dirent *de, const char *path, int len); 55 56static struct trace_key trace_exclude = TRACE_KEY_INIT(EXCLUDE); 57 58/* helper string functions with support for the ignore_case flag */ 59int strcmp_icase(const char *a, const char *b) 60{ 61 return ignore_case ? strcasecmp(a, b) : strcmp(a, b); 62} 63 64int strncmp_icase(const char *a, const char *b, size_t count) 65{ 66 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count); 67} 68 69int fnmatch_icase(const char *pattern, const char *string, int flags) 70{ 71 return wildmatch(pattern, string, 72 flags | (ignore_case ? WM_CASEFOLD : 0), 73 NULL); 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 NULL); 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 NULL); 103} 104 105static int fnmatch_icase_mem(const char *pattern, int patternlen, 106 const char *string, int stringlen, 107 int flags) 108{ 109 int match_status; 110 struct strbuf pat_buf = STRBUF_INIT; 111 struct strbuf str_buf = STRBUF_INIT; 112 const char *use_pat = pattern; 113 const char *use_str = string; 114 115 if (pattern[patternlen]) { 116 strbuf_add(&pat_buf, pattern, patternlen); 117 use_pat = pat_buf.buf; 118 } 119 if (string[stringlen]) { 120 strbuf_add(&str_buf, string, stringlen); 121 use_str = str_buf.buf; 122 } 123 124 if (ignore_case) 125 flags |= WM_CASEFOLD; 126 match_status = wildmatch(use_pat, use_str, flags, NULL); 127 128 strbuf_release(&pat_buf); 129 strbuf_release(&str_buf); 130 131 return match_status; 132} 133 134static size_t common_prefix_len(const struct pathspec *pathspec) 135{ 136 int n; 137 size_t max = 0; 138 139 /* 140 * ":(icase)path" is treated as a pathspec full of 141 * wildcard. In other words, only prefix is considered common 142 * prefix. If the pathspec is abc/foo abc/bar, running in 143 * subdir xyz, the common prefix is still xyz, not xuz/abc as 144 * in non-:(icase). 145 */ 146 GUARD_PATHSPEC(pathspec, 147 PATHSPEC_FROMTOP | 148 PATHSPEC_MAXDEPTH | 149 PATHSPEC_LITERAL | 150 PATHSPEC_GLOB | 151 PATHSPEC_ICASE | 152 PATHSPEC_EXCLUDE); 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, const struct pathspec *pathspec) 191{ 192 size_t len; 193 194 /* 195 * Calculate common prefix for the pathspec, and 196 * use that to optimize the directory walk 197 */ 198 len = common_prefix_len(pathspec); 199 200 /* Read the directory and prune it */ 201 read_directory(dir, pathspec->nr ? pathspec->_raw[0] : "", len, pathspec); 202 return len; 203} 204 205int within_depth(const char *name, int namelen, 206 int depth, int max_depth) 207{ 208 const char *cp = name, *cpe = name + namelen; 209 210 while (cp < cpe) { 211 if (*cp++ != '/') 212 continue; 213 depth++; 214 if (depth > max_depth) 215 return 0; 216 } 217 return 1; 218} 219 220#define DO_MATCH_EXCLUDE 1 221#define DO_MATCH_DIRECTORY 2 222 223/* 224 * Does 'match' match the given name? 225 * A match is found if 226 * 227 * (1) the 'match' string is leading directory of 'name', or 228 * (2) the 'match' string is a wildcard and matches 'name', or 229 * (3) the 'match' string is exactly the same as 'name'. 230 * 231 * and the return value tells which case it was. 232 * 233 * It returns 0 when there is no match. 234 */ 235static int match_pathspec_item(const struct pathspec_item *item, int prefix, 236 const char *name, int namelen, unsigned flags) 237{ 238 /* name/namelen has prefix cut off by caller */ 239 const char *match = item->match + prefix; 240 int matchlen = item->len - prefix; 241 242 /* 243 * The normal call pattern is: 244 * 1. prefix = common_prefix_len(ps); 245 * 2. prune something, or fill_directory 246 * 3. match_pathspec() 247 * 248 * 'prefix' at #1 may be shorter than the command's prefix and 249 * it's ok for #2 to match extra files. Those extras will be 250 * trimmed at #3. 251 * 252 * Suppose the pathspec is 'foo' and '../bar' running from 253 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 254 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 255 * user does not want XYZ/foo, only the "foo" part should be 256 * case-insensitive. We need to filter out XYZ/foo here. In 257 * other words, we do not trust the caller on comparing the 258 * prefix part when :(icase) is involved. We do exact 259 * comparison ourselves. 260 * 261 * Normally the caller (common_prefix_len() in fact) does 262 * _exact_ matching on name[-prefix+1..-1] and we do not need 263 * to check that part. Be defensive and check it anyway, in 264 * case common_prefix_len is changed, or a new caller is 265 * introduced that does not use common_prefix_len. 266 * 267 * If the penalty turns out too high when prefix is really 268 * long, maybe change it to 269 * strncmp(match, name, item->prefix - prefix) 270 */ 271 if (item->prefix && (item->magic & PATHSPEC_ICASE) && 272 strncmp(item->match, name - prefix, item->prefix)) 273 return 0; 274 275 /* If the match was just the prefix, we matched */ 276 if (!*match) 277 return MATCHED_RECURSIVELY; 278 279 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 280 if (matchlen == namelen) 281 return MATCHED_EXACTLY; 282 283 if (match[matchlen-1] == '/' || name[matchlen] == '/') 284 return MATCHED_RECURSIVELY; 285 } else if ((flags & DO_MATCH_DIRECTORY) && 286 match[matchlen - 1] == '/' && 287 namelen == matchlen - 1 && 288 !ps_strncmp(item, match, name, namelen)) 289 return MATCHED_EXACTLY; 290 291 if (item->nowildcard_len < item->len && 292 !git_fnmatch(item, match, name, 293 item->nowildcard_len - prefix)) 294 return MATCHED_FNMATCH; 295 296 return 0; 297} 298 299/* 300 * Given a name and a list of pathspecs, returns the nature of the 301 * closest (i.e. most specific) match of the name to any of the 302 * pathspecs. 303 * 304 * The caller typically calls this multiple times with the same 305 * pathspec and seen[] array but with different name/namelen 306 * (e.g. entries from the index) and is interested in seeing if and 307 * how each pathspec matches all the names it calls this function 308 * with. A mark is left in the seen[] array for each pathspec element 309 * indicating the closest type of match that element achieved, so if 310 * seen[n] remains zero after multiple invocations, that means the nth 311 * pathspec did not match any names, which could indicate that the 312 * user mistyped the nth pathspec. 313 */ 314static int do_match_pathspec(const struct pathspec *ps, 315 const char *name, int namelen, 316 int prefix, char *seen, 317 unsigned flags) 318{ 319 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE; 320 321 GUARD_PATHSPEC(ps, 322 PATHSPEC_FROMTOP | 323 PATHSPEC_MAXDEPTH | 324 PATHSPEC_LITERAL | 325 PATHSPEC_GLOB | 326 PATHSPEC_ICASE | 327 PATHSPEC_EXCLUDE); 328 329 if (!ps->nr) { 330 if (!ps->recursive || 331 !(ps->magic & PATHSPEC_MAXDEPTH) || 332 ps->max_depth == -1) 333 return MATCHED_RECURSIVELY; 334 335 if (within_depth(name, namelen, 0, ps->max_depth)) 336 return MATCHED_EXACTLY; 337 else 338 return 0; 339 } 340 341 name += prefix; 342 namelen -= prefix; 343 344 for (i = ps->nr - 1; i >= 0; i--) { 345 int how; 346 347 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 348 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 349 continue; 350 351 if (seen && seen[i] == MATCHED_EXACTLY) 352 continue; 353 /* 354 * Make exclude patterns optional and never report 355 * "pathspec ':(exclude)foo' matches no files" 356 */ 357 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 358 seen[i] = MATCHED_FNMATCH; 359 how = match_pathspec_item(ps->items+i, prefix, name, 360 namelen, flags); 361 if (ps->recursive && 362 (ps->magic & PATHSPEC_MAXDEPTH) && 363 ps->max_depth != -1 && 364 how && how != MATCHED_FNMATCH) { 365 int len = ps->items[i].len; 366 if (name[len] == '/') 367 len++; 368 if (within_depth(name+len, namelen-len, 0, ps->max_depth)) 369 how = MATCHED_EXACTLY; 370 else 371 how = 0; 372 } 373 if (how) { 374 if (retval < how) 375 retval = how; 376 if (seen && seen[i] < how) 377 seen[i] = how; 378 } 379 } 380 return retval; 381} 382 383int match_pathspec(const struct pathspec *ps, 384 const char *name, int namelen, 385 int prefix, char *seen, int is_dir) 386{ 387 int positive, negative; 388 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0; 389 positive = do_match_pathspec(ps, name, namelen, 390 prefix, seen, flags); 391 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 392 return positive; 393 negative = do_match_pathspec(ps, name, namelen, 394 prefix, seen, 395 flags | DO_MATCH_EXCLUDE); 396 return negative ? 0 : positive; 397} 398 399int report_path_error(const char *ps_matched, 400 const struct pathspec *pathspec, 401 const char *prefix) 402{ 403 /* 404 * Make sure all pathspec matched; otherwise it is an error. 405 */ 406 int num, errors = 0; 407 for (num = 0; num < pathspec->nr; num++) { 408 int other, found_dup; 409 410 if (ps_matched[num]) 411 continue; 412 /* 413 * The caller might have fed identical pathspec 414 * twice. Do not barf on such a mistake. 415 * FIXME: parse_pathspec should have eliminated 416 * duplicate pathspec. 417 */ 418 for (found_dup = other = 0; 419 !found_dup && other < pathspec->nr; 420 other++) { 421 if (other == num || !ps_matched[other]) 422 continue; 423 if (!strcmp(pathspec->items[other].original, 424 pathspec->items[num].original)) 425 /* 426 * Ok, we have a match already. 427 */ 428 found_dup = 1; 429 } 430 if (found_dup) 431 continue; 432 433 error("pathspec '%s' did not match any file(s) known to git.", 434 pathspec->items[num].original); 435 errors++; 436 } 437 return errors; 438} 439 440/* 441 * Return the length of the "simple" part of a path match limiter. 442 */ 443int simple_length(const char *match) 444{ 445 int len = -1; 446 447 for (;;) { 448 unsigned char c = *match++; 449 len++; 450 if (c == '\0' || is_glob_special(c)) 451 return len; 452 } 453} 454 455int no_wildcard(const char *string) 456{ 457 return string[simple_length(string)] == '\0'; 458} 459 460void parse_exclude_pattern(const char **pattern, 461 int *patternlen, 462 int *flags, 463 int *nowildcardlen) 464{ 465 const char *p = *pattern; 466 size_t i, len; 467 468 *flags = 0; 469 if (*p == '!') { 470 *flags |= EXC_FLAG_NEGATIVE; 471 p++; 472 } 473 len = strlen(p); 474 if (len && p[len - 1] == '/') { 475 len--; 476 *flags |= EXC_FLAG_MUSTBEDIR; 477 } 478 for (i = 0; i < len; i++) { 479 if (p[i] == '/') 480 break; 481 } 482 if (i == len) 483 *flags |= EXC_FLAG_NODIR; 484 *nowildcardlen = simple_length(p); 485 /* 486 * we should have excluded the trailing slash from 'p' too, 487 * but that's one more allocation. Instead just make sure 488 * nowildcardlen does not exceed real patternlen 489 */ 490 if (*nowildcardlen > len) 491 *nowildcardlen = len; 492 if (*p == '*' && no_wildcard(p + 1)) 493 *flags |= EXC_FLAG_ENDSWITH; 494 *pattern = p; 495 *patternlen = len; 496} 497 498void add_exclude(const char *string, const char *base, 499 int baselen, struct exclude_list *el, int srcpos) 500{ 501 struct exclude *x; 502 int patternlen; 503 int flags; 504 int nowildcardlen; 505 506 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 507 if (flags & EXC_FLAG_MUSTBEDIR) { 508 char *s; 509 x = xmalloc(sizeof(*x) + patternlen + 1); 510 s = (char *)(x+1); 511 memcpy(s, string, patternlen); 512 s[patternlen] = '\0'; 513 x->pattern = s; 514 } else { 515 x = xmalloc(sizeof(*x)); 516 x->pattern = string; 517 } 518 x->patternlen = patternlen; 519 x->nowildcardlen = nowildcardlen; 520 x->base = base; 521 x->baselen = baselen; 522 x->flags = flags; 523 x->srcpos = srcpos; 524 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc); 525 el->excludes[el->nr++] = x; 526 x->el = el; 527} 528 529static void *read_skip_worktree_file_from_index(const char *path, size_t *size, 530 struct sha1_stat *sha1_stat) 531{ 532 int pos, len; 533 unsigned long sz; 534 enum object_type type; 535 void *data; 536 537 len = strlen(path); 538 pos = cache_name_pos(path, len); 539 if (pos < 0) 540 return NULL; 541 if (!ce_skip_worktree(active_cache[pos])) 542 return NULL; 543 data = read_sha1_file(active_cache[pos]->sha1, &type, &sz); 544 if (!data || type != OBJ_BLOB) { 545 free(data); 546 return NULL; 547 } 548 *size = xsize_t(sz); 549 if (sha1_stat) { 550 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat)); 551 hashcpy(sha1_stat->sha1, active_cache[pos]->sha1); 552 } 553 return data; 554} 555 556/* 557 * Frees memory within el which was allocated for exclude patterns and 558 * the file buffer. Does not free el itself. 559 */ 560void clear_exclude_list(struct exclude_list *el) 561{ 562 int i; 563 564 for (i = 0; i < el->nr; i++) 565 free(el->excludes[i]); 566 free(el->excludes); 567 free(el->filebuf); 568 569 memset(el, 0, sizeof(*el)); 570} 571 572static void trim_trailing_spaces(char *buf) 573{ 574 char *p, *last_space = NULL; 575 576 for (p = buf; *p; p++) 577 switch (*p) { 578 case ' ': 579 if (!last_space) 580 last_space = p; 581 break; 582 case '\\': 583 p++; 584 if (!*p) 585 return; 586 /* fallthrough */ 587 default: 588 last_space = NULL; 589 } 590 591 if (last_space) 592 *last_space = '\0'; 593} 594 595/* 596 * Given a subdirectory name and "dir" of the current directory, 597 * search the subdir in "dir" and return it, or create a new one if it 598 * does not exist in "dir". 599 * 600 * If "name" has the trailing slash, it'll be excluded in the search. 601 */ 602static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 603 struct untracked_cache_dir *dir, 604 const char *name, int len) 605{ 606 int first, last; 607 struct untracked_cache_dir *d; 608 if (!dir) 609 return NULL; 610 if (len && name[len - 1] == '/') 611 len--; 612 first = 0; 613 last = dir->dirs_nr; 614 while (last > first) { 615 int cmp, next = (last + first) >> 1; 616 d = dir->dirs[next]; 617 cmp = strncmp(name, d->name, len); 618 if (!cmp && strlen(d->name) > len) 619 cmp = -1; 620 if (!cmp) 621 return d; 622 if (cmp < 0) { 623 last = next; 624 continue; 625 } 626 first = next+1; 627 } 628 629 uc->dir_created++; 630 d = xmalloc(sizeof(*d) + len + 1); 631 memset(d, 0, sizeof(*d)); 632 memcpy(d->name, name, len); 633 d->name[len] = '\0'; 634 635 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc); 636 memmove(dir->dirs + first + 1, dir->dirs + first, 637 (dir->dirs_nr - first) * sizeof(*dir->dirs)); 638 dir->dirs_nr++; 639 dir->dirs[first] = d; 640 return d; 641} 642 643static void do_invalidate_gitignore(struct untracked_cache_dir *dir) 644{ 645 int i; 646 dir->valid = 0; 647 dir->untracked_nr = 0; 648 for (i = 0; i < dir->dirs_nr; i++) 649 do_invalidate_gitignore(dir->dirs[i]); 650} 651 652static void invalidate_gitignore(struct untracked_cache *uc, 653 struct untracked_cache_dir *dir) 654{ 655 uc->gitignore_invalidated++; 656 do_invalidate_gitignore(dir); 657} 658 659static void invalidate_directory(struct untracked_cache *uc, 660 struct untracked_cache_dir *dir) 661{ 662 int i; 663 uc->dir_invalidated++; 664 dir->valid = 0; 665 dir->untracked_nr = 0; 666 for (i = 0; i < dir->dirs_nr; i++) 667 dir->dirs[i]->recurse = 0; 668} 669 670/* 671 * Given a file with name "fname", read it (either from disk, or from 672 * the index if "check_index" is non-zero), parse it and store the 673 * exclude rules in "el". 674 * 675 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 676 * stat data from disk (only valid if add_excludes returns zero). If 677 * ss_valid is non-zero, "ss" must contain good value as input. 678 */ 679static int add_excludes(const char *fname, const char *base, int baselen, 680 struct exclude_list *el, int check_index, 681 struct sha1_stat *sha1_stat) 682{ 683 struct stat st; 684 int fd, i, lineno = 1; 685 size_t size = 0; 686 char *buf, *entry; 687 688 fd = open(fname, O_RDONLY); 689 if (fd < 0 || fstat(fd, &st) < 0) { 690 if (errno != ENOENT) 691 warn_on_inaccessible(fname); 692 if (0 <= fd) 693 close(fd); 694 if (!check_index || 695 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL) 696 return -1; 697 if (size == 0) { 698 free(buf); 699 return 0; 700 } 701 if (buf[size-1] != '\n') { 702 buf = xrealloc(buf, size+1); 703 buf[size++] = '\n'; 704 } 705 } else { 706 size = xsize_t(st.st_size); 707 if (size == 0) { 708 if (sha1_stat) { 709 fill_stat_data(&sha1_stat->stat, &st); 710 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); 711 sha1_stat->valid = 1; 712 } 713 close(fd); 714 return 0; 715 } 716 buf = xmalloc(size+1); 717 if (read_in_full(fd, buf, size) != size) { 718 free(buf); 719 close(fd); 720 return -1; 721 } 722 buf[size++] = '\n'; 723 close(fd); 724 if (sha1_stat) { 725 int pos; 726 if (sha1_stat->valid && 727 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st)) 728 ; /* no content change, ss->sha1 still good */ 729 else if (check_index && 730 (pos = cache_name_pos(fname, strlen(fname))) >= 0 && 731 !ce_stage(active_cache[pos]) && 732 ce_uptodate(active_cache[pos]) && 733 !would_convert_to_git(fname)) 734 hashcpy(sha1_stat->sha1, active_cache[pos]->sha1); 735 else 736 hash_sha1_file(buf, size, "blob", sha1_stat->sha1); 737 fill_stat_data(&sha1_stat->stat, &st); 738 sha1_stat->valid = 1; 739 } 740 } 741 742 el->filebuf = buf; 743 744 if (skip_utf8_bom(&buf, size)) 745 size -= buf - el->filebuf; 746 747 entry = buf; 748 749 for (i = 0; i < size; i++) { 750 if (buf[i] == '\n') { 751 if (entry != buf + i && entry[0] != '#') { 752 buf[i - (i && buf[i-1] == '\r')] = 0; 753 trim_trailing_spaces(entry); 754 add_exclude(entry, base, baselen, el, lineno); 755 } 756 lineno++; 757 entry = buf + i + 1; 758 } 759 } 760 return 0; 761} 762 763int add_excludes_from_file_to_list(const char *fname, const char *base, 764 int baselen, struct exclude_list *el, 765 int check_index) 766{ 767 return add_excludes(fname, base, baselen, el, check_index, NULL); 768} 769 770struct exclude_list *add_exclude_list(struct dir_struct *dir, 771 int group_type, const char *src) 772{ 773 struct exclude_list *el; 774 struct exclude_list_group *group; 775 776 group = &dir->exclude_list_group[group_type]; 777 ALLOC_GROW(group->el, group->nr + 1, group->alloc); 778 el = &group->el[group->nr++]; 779 memset(el, 0, sizeof(*el)); 780 el->src = src; 781 return el; 782} 783 784/* 785 * Used to set up core.excludesfile and .git/info/exclude lists. 786 */ 787static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname, 788 struct sha1_stat *sha1_stat) 789{ 790 struct exclude_list *el; 791 /* 792 * catch setup_standard_excludes() that's called before 793 * dir->untracked is assigned. That function behaves 794 * differently when dir->untracked is non-NULL. 795 */ 796 if (!dir->untracked) 797 dir->unmanaged_exclude_files++; 798 el = add_exclude_list(dir, EXC_FILE, fname); 799 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0) 800 die("cannot use %s as an exclude file", fname); 801} 802 803void add_excludes_from_file(struct dir_struct *dir, const char *fname) 804{ 805 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */ 806 add_excludes_from_file_1(dir, fname, NULL); 807} 808 809int match_basename(const char *basename, int basenamelen, 810 const char *pattern, int prefix, int patternlen, 811 int flags) 812{ 813 if (prefix == patternlen) { 814 if (patternlen == basenamelen && 815 !strncmp_icase(pattern, basename, basenamelen)) 816 return 1; 817 } else if (flags & EXC_FLAG_ENDSWITH) { 818 /* "*literal" matching against "fooliteral" */ 819 if (patternlen - 1 <= basenamelen && 820 !strncmp_icase(pattern + 1, 821 basename + basenamelen - (patternlen - 1), 822 patternlen - 1)) 823 return 1; 824 } else { 825 if (fnmatch_icase_mem(pattern, patternlen, 826 basename, basenamelen, 827 0) == 0) 828 return 1; 829 } 830 return 0; 831} 832 833int match_pathname(const char *pathname, int pathlen, 834 const char *base, int baselen, 835 const char *pattern, int prefix, int patternlen, 836 int flags) 837{ 838 const char *name; 839 int namelen; 840 841 /* 842 * match with FNM_PATHNAME; the pattern has base implicitly 843 * in front of it. 844 */ 845 if (*pattern == '/') { 846 pattern++; 847 patternlen--; 848 prefix--; 849 } 850 851 /* 852 * baselen does not count the trailing slash. base[] may or 853 * may not end with a trailing slash though. 854 */ 855 if (pathlen < baselen + 1 || 856 (baselen && pathname[baselen] != '/') || 857 strncmp_icase(pathname, base, baselen)) 858 return 0; 859 860 namelen = baselen ? pathlen - baselen - 1 : pathlen; 861 name = pathname + pathlen - namelen; 862 863 if (prefix) { 864 /* 865 * if the non-wildcard part is longer than the 866 * remaining pathname, surely it cannot match. 867 */ 868 if (prefix > namelen) 869 return 0; 870 871 if (strncmp_icase(pattern, name, prefix)) 872 return 0; 873 pattern += prefix; 874 patternlen -= prefix; 875 name += prefix; 876 namelen -= prefix; 877 878 /* 879 * If the whole pattern did not have a wildcard, 880 * then our prefix match is all we need; we 881 * do not need to call fnmatch at all. 882 */ 883 if (!patternlen && (!namelen || *name == '/')) 884 return 1; 885 } 886 887 return fnmatch_icase_mem(pattern, patternlen, 888 name, namelen, 889 WM_PATHNAME) == 0; 890} 891 892/* 893 * Scan the given exclude list in reverse to see whether pathname 894 * should be ignored. The first match (i.e. the last on the list), if 895 * any, determines the fate. Returns the exclude_list element which 896 * matched, or NULL for undecided. 897 */ 898static struct exclude *last_exclude_matching_from_list(const char *pathname, 899 int pathlen, 900 const char *basename, 901 int *dtype, 902 struct exclude_list *el) 903{ 904 struct exclude *exc = NULL; /* undecided */ 905 int i; 906 907 if (!el->nr) 908 return NULL; /* undefined */ 909 910 trace_printf_key(&trace_exclude, "exclude: from %s\n", el->src); 911 912 for (i = el->nr - 1; 0 <= i; i--) { 913 struct exclude *x = el->excludes[i]; 914 const char *exclude = x->pattern; 915 int prefix = x->nowildcardlen; 916 917 if (x->flags & EXC_FLAG_MUSTBEDIR) { 918 if (*dtype == DT_UNKNOWN) 919 *dtype = get_dtype(NULL, pathname, pathlen); 920 if (*dtype != DT_DIR) 921 continue; 922 } 923 924 if (x->flags & EXC_FLAG_NODIR) { 925 if (match_basename(basename, 926 pathlen - (basename - pathname), 927 exclude, prefix, x->patternlen, 928 x->flags)) { 929 exc = x; 930 break; 931 } 932 continue; 933 } 934 935 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/'); 936 if (match_pathname(pathname, pathlen, 937 x->base, x->baselen ? x->baselen - 1 : 0, 938 exclude, prefix, x->patternlen, x->flags)) { 939 exc = x; 940 break; 941 } 942 } 943 944 if (!exc) { 945 trace_printf_key(&trace_exclude, "exclude: %.*s => n/a\n", 946 pathlen, pathname); 947 return NULL; 948 } 949 950 trace_printf_key(&trace_exclude, "exclude: %.*s vs %s at line %d => %s\n", 951 pathlen, pathname, exc->pattern, exc->srcpos, 952 exc->flags & EXC_FLAG_NEGATIVE ? "no" : "yes"); 953 return exc; 954} 955 956/* 957 * Scan the list and let the last match determine the fate. 958 * Return 1 for exclude, 0 for include and -1 for undecided. 959 */ 960int is_excluded_from_list(const char *pathname, 961 int pathlen, const char *basename, int *dtype, 962 struct exclude_list *el) 963{ 964 struct exclude *exclude; 965 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el); 966 if (exclude) 967 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1; 968 return -1; /* undecided */ 969} 970 971static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir, 972 const char *pathname, int pathlen, const char *basename, 973 int *dtype_p) 974{ 975 int i, j; 976 struct exclude_list_group *group; 977 struct exclude *exclude; 978 for (i = EXC_CMDL; i <= EXC_FILE; i++) { 979 group = &dir->exclude_list_group[i]; 980 for (j = group->nr - 1; j >= 0; j--) { 981 exclude = last_exclude_matching_from_list( 982 pathname, pathlen, basename, dtype_p, 983 &group->el[j]); 984 if (exclude) 985 return exclude; 986 } 987 } 988 return NULL; 989} 990 991/* 992 * Loads the per-directory exclude list for the substring of base 993 * which has a char length of baselen. 994 */ 995static void prep_exclude(struct dir_struct *dir, const char *base, int baselen) 996{ 997 struct exclude_list_group *group; 998 struct exclude_list *el; 999 struct exclude_stack *stk = NULL;1000 struct untracked_cache_dir *untracked;1001 int current;10021003 group = &dir->exclude_list_group[EXC_DIRS];10041005 /*1006 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1007 * which originate from directories not in the prefix of the1008 * path being checked.1009 */1010 while ((stk = dir->exclude_stack) != NULL) {1011 if (stk->baselen <= baselen &&1012 !strncmp(dir->basebuf.buf, base, stk->baselen))1013 break;1014 el = &group->el[dir->exclude_stack->exclude_ix];1015 dir->exclude_stack = stk->prev;1016 dir->exclude = NULL;1017 free((char *)el->src); /* see strbuf_detach() below */1018 clear_exclude_list(el);1019 free(stk);1020 group->nr--;1021 }10221023 /* Skip traversing into sub directories if the parent is excluded */1024 if (dir->exclude)1025 return;10261027 /*1028 * Lazy initialization. All call sites currently just1029 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1030 * them seems lots of work for little benefit.1031 */1032 if (!dir->basebuf.buf)1033 strbuf_init(&dir->basebuf, PATH_MAX);10341035 /* Read from the parent directories and push them down. */1036 current = stk ? stk->baselen : -1;1037 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);1038 if (dir->untracked)1039 untracked = stk ? stk->ucd : dir->untracked->root;1040 else1041 untracked = NULL;10421043 while (current < baselen) {1044 const char *cp;1045 struct sha1_stat sha1_stat;10461047 stk = xcalloc(1, sizeof(*stk));1048 if (current < 0) {1049 cp = base;1050 current = 0;1051 } else {1052 cp = strchr(base + current + 1, '/');1053 if (!cp)1054 die("oops in prep_exclude");1055 cp++;1056 untracked =1057 lookup_untracked(dir->untracked, untracked,1058 base + current,1059 cp - base - current);1060 }1061 stk->prev = dir->exclude_stack;1062 stk->baselen = cp - base;1063 stk->exclude_ix = group->nr;1064 stk->ucd = untracked;1065 el = add_exclude_list(dir, EXC_DIRS, NULL);1066 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1067 assert(stk->baselen == dir->basebuf.len);10681069 /* Abort if the directory is excluded */1070 if (stk->baselen) {1071 int dt = DT_DIR;1072 dir->basebuf.buf[stk->baselen - 1] = 0;1073 dir->exclude = last_exclude_matching_from_lists(dir,1074 dir->basebuf.buf, stk->baselen - 1,1075 dir->basebuf.buf + current, &dt);1076 dir->basebuf.buf[stk->baselen - 1] = '/';1077 if (dir->exclude &&1078 dir->exclude->flags & EXC_FLAG_NEGATIVE)1079 dir->exclude = NULL;1080 if (dir->exclude) {1081 dir->exclude_stack = stk;1082 return;1083 }1084 }10851086 /* Try to read per-directory file */1087 hashclr(sha1_stat.sha1);1088 sha1_stat.valid = 0;1089 if (dir->exclude_per_dir &&1090 /*1091 * If we know that no files have been added in1092 * this directory (i.e. valid_cached_dir() has1093 * been executed and set untracked->valid) ..1094 */1095 (!untracked || !untracked->valid ||1096 /*1097 * .. and .gitignore does not exist before1098 * (i.e. null exclude_sha1). Then we can skip1099 * loading .gitignore, which would result in1100 * ENOENT anyway.1101 */1102 !is_null_sha1(untracked->exclude_sha1))) {1103 /*1104 * dir->basebuf gets reused by the traversal, but we1105 * need fname to remain unchanged to ensure the src1106 * member of each struct exclude correctly1107 * back-references its source file. Other invocations1108 * of add_exclude_list provide stable strings, so we1109 * strbuf_detach() and free() here in the caller.1110 */1111 struct strbuf sb = STRBUF_INIT;1112 strbuf_addbuf(&sb, &dir->basebuf);1113 strbuf_addstr(&sb, dir->exclude_per_dir);1114 el->src = strbuf_detach(&sb, NULL);1115 add_excludes(el->src, el->src, stk->baselen, el, 1,1116 untracked ? &sha1_stat : NULL);1117 }1118 /*1119 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1120 * will first be called in valid_cached_dir() then maybe many1121 * times more in last_exclude_matching(). When the cache is1122 * used, last_exclude_matching() will not be called and1123 * reading .gitignore content will be a waste.1124 *1125 * So when it's called by valid_cached_dir() and we can get1126 * .gitignore SHA-1 from the index (i.e. .gitignore is not1127 * modified on work tree), we could delay reading the1128 * .gitignore content until we absolutely need it in1129 * last_exclude_matching(). Be careful about ignore rule1130 * order, though, if you do that.1131 */1132 if (untracked &&1133 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {1134 invalidate_gitignore(dir->untracked, untracked);1135 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);1136 }1137 dir->exclude_stack = stk;1138 current = stk->baselen;1139 }1140 strbuf_setlen(&dir->basebuf, baselen);1141}11421143/*1144 * Loads the exclude lists for the directory containing pathname, then1145 * scans all exclude lists to determine whether pathname is excluded.1146 * Returns the exclude_list element which matched, or NULL for1147 * undecided.1148 */1149struct exclude *last_exclude_matching(struct dir_struct *dir,1150 const char *pathname,1151 int *dtype_p)1152{1153 int pathlen = strlen(pathname);1154 const char *basename = strrchr(pathname, '/');1155 basename = (basename) ? basename+1 : pathname;11561157 prep_exclude(dir, pathname, basename-pathname);11581159 if (dir->exclude)1160 return dir->exclude;11611162 return last_exclude_matching_from_lists(dir, pathname, pathlen,1163 basename, dtype_p);1164}11651166/*1167 * Loads the exclude lists for the directory containing pathname, then1168 * scans all exclude lists to determine whether pathname is excluded.1169 * Returns 1 if true, otherwise 0.1170 */1171int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)1172{1173 struct exclude *exclude =1174 last_exclude_matching(dir, pathname, dtype_p);1175 if (exclude)1176 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;1177 return 0;1178}11791180static struct dir_entry *dir_entry_new(const char *pathname, int len)1181{1182 struct dir_entry *ent;11831184 ent = xmalloc(sizeof(*ent) + len + 1);1185 ent->len = len;1186 memcpy(ent->name, pathname, len);1187 ent->name[len] = 0;1188 return ent;1189}11901191static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)1192{1193 if (cache_file_exists(pathname, len, ignore_case))1194 return NULL;11951196 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1197 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);1198}11991200struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)1201{1202 if (!cache_name_is_other(pathname, len))1203 return NULL;12041205 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1206 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);1207}12081209enum exist_status {1210 index_nonexistent = 0,1211 index_directory,1212 index_gitdir1213};12141215/*1216 * Do not use the alphabetically sorted index to look up1217 * the directory name; instead, use the case insensitive1218 * directory hash.1219 */1220static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)1221{1222 struct cache_entry *ce;12231224 if (cache_dir_exists(dirname, len))1225 return index_directory;12261227 ce = cache_file_exists(dirname, len, ignore_case);1228 if (ce && S_ISGITLINK(ce->ce_mode))1229 return index_gitdir;12301231 return index_nonexistent;1232}12331234/*1235 * The index sorts alphabetically by entry name, which1236 * means that a gitlink sorts as '\0' at the end, while1237 * a directory (which is defined not as an entry, but as1238 * the files it contains) will sort with the '/' at the1239 * end.1240 */1241static enum exist_status directory_exists_in_index(const char *dirname, int len)1242{1243 int pos;12441245 if (ignore_case)1246 return directory_exists_in_index_icase(dirname, len);12471248 pos = cache_name_pos(dirname, len);1249 if (pos < 0)1250 pos = -pos-1;1251 while (pos < active_nr) {1252 const struct cache_entry *ce = active_cache[pos++];1253 unsigned char endchar;12541255 if (strncmp(ce->name, dirname, len))1256 break;1257 endchar = ce->name[len];1258 if (endchar > '/')1259 break;1260 if (endchar == '/')1261 return index_directory;1262 if (!endchar && S_ISGITLINK(ce->ce_mode))1263 return index_gitdir;1264 }1265 return index_nonexistent;1266}12671268/*1269 * When we find a directory when traversing the filesystem, we1270 * have three distinct cases:1271 *1272 * - ignore it1273 * - see it as a directory1274 * - recurse into it1275 *1276 * and which one we choose depends on a combination of existing1277 * git index contents and the flags passed into the directory1278 * traversal routine.1279 *1280 * Case 1: If we *already* have entries in the index under that1281 * directory name, we always recurse into the directory to see1282 * all the files.1283 *1284 * Case 2: If we *already* have that directory name as a gitlink,1285 * we always continue to see it as a gitlink, regardless of whether1286 * there is an actual git directory there or not (it might not1287 * be checked out as a subproject!)1288 *1289 * Case 3: if we didn't have it in the index previously, we1290 * have a few sub-cases:1291 *1292 * (a) if "show_other_directories" is true, we show it as1293 * just a directory, unless "hide_empty_directories" is1294 * also true, in which case we need to check if it contains any1295 * untracked and / or ignored files.1296 * (b) if it looks like a git directory, and we don't have1297 * 'no_gitlinks' set we treat it as a gitlink, and show it1298 * as a directory.1299 * (c) otherwise, we recurse into it.1300 */1301static enum path_treatment treat_directory(struct dir_struct *dir,1302 struct untracked_cache_dir *untracked,1303 const char *dirname, int len, int baselen, int exclude,1304 const struct path_simplify *simplify)1305{1306 /* The "len-1" is to strip the final '/' */1307 switch (directory_exists_in_index(dirname, len-1)) {1308 case index_directory:1309 return path_recurse;13101311 case index_gitdir:1312 return path_none;13131314 case index_nonexistent:1315 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1316 break;1317 if (!(dir->flags & DIR_NO_GITLINKS)) {1318 unsigned char sha1[20];1319 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)1320 return path_untracked;1321 }1322 return path_recurse;1323 }13241325 /* This is the "show_other_directories" case */13261327 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1328 return exclude ? path_excluded : path_untracked;13291330 untracked = lookup_untracked(dir->untracked, untracked,1331 dirname + baselen, len - baselen);1332 return read_directory_recursive(dir, dirname, len,1333 untracked, 1, simplify);1334}13351336/*1337 * This is an inexact early pruning of any recursive directory1338 * reading - if the path cannot possibly be in the pathspec,1339 * return true, and we'll skip it early.1340 */1341static int simplify_away(const char *path, int pathlen, const struct path_simplify *simplify)1342{1343 if (simplify) {1344 for (;;) {1345 const char *match = simplify->path;1346 int len = simplify->len;13471348 if (!match)1349 break;1350 if (len > pathlen)1351 len = pathlen;1352 if (!memcmp(path, match, len))1353 return 0;1354 simplify++;1355 }1356 return 1;1357 }1358 return 0;1359}13601361/*1362 * This function tells us whether an excluded path matches a1363 * list of "interesting" pathspecs. That is, whether a path matched1364 * by any of the pathspecs could possibly be ignored by excluding1365 * the specified path. This can happen if:1366 *1367 * 1. the path is mentioned explicitly in the pathspec1368 *1369 * 2. the path is a directory prefix of some element in the1370 * pathspec1371 */1372static int exclude_matches_pathspec(const char *path, int len,1373 const struct path_simplify *simplify)1374{1375 if (simplify) {1376 for (; simplify->path; simplify++) {1377 if (len == simplify->len1378 && !memcmp(path, simplify->path, len))1379 return 1;1380 if (len < simplify->len1381 && simplify->path[len] == '/'1382 && !memcmp(path, simplify->path, len))1383 return 1;1384 }1385 }1386 return 0;1387}13881389static int get_index_dtype(const char *path, int len)1390{1391 int pos;1392 const struct cache_entry *ce;13931394 ce = cache_file_exists(path, len, 0);1395 if (ce) {1396 if (!ce_uptodate(ce))1397 return DT_UNKNOWN;1398 if (S_ISGITLINK(ce->ce_mode))1399 return DT_DIR;1400 /*1401 * Nobody actually cares about the1402 * difference between DT_LNK and DT_REG1403 */1404 return DT_REG;1405 }14061407 /* Try to look it up as a directory */1408 pos = cache_name_pos(path, len);1409 if (pos >= 0)1410 return DT_UNKNOWN;1411 pos = -pos-1;1412 while (pos < active_nr) {1413 ce = active_cache[pos++];1414 if (strncmp(ce->name, path, len))1415 break;1416 if (ce->name[len] > '/')1417 break;1418 if (ce->name[len] < '/')1419 continue;1420 if (!ce_uptodate(ce))1421 break; /* continue? */1422 return DT_DIR;1423 }1424 return DT_UNKNOWN;1425}14261427static int get_dtype(struct dirent *de, const char *path, int len)1428{1429 int dtype = de ? DTYPE(de) : DT_UNKNOWN;1430 struct stat st;14311432 if (dtype != DT_UNKNOWN)1433 return dtype;1434 dtype = get_index_dtype(path, len);1435 if (dtype != DT_UNKNOWN)1436 return dtype;1437 if (lstat(path, &st))1438 return dtype;1439 if (S_ISREG(st.st_mode))1440 return DT_REG;1441 if (S_ISDIR(st.st_mode))1442 return DT_DIR;1443 if (S_ISLNK(st.st_mode))1444 return DT_LNK;1445 return dtype;1446}14471448static enum path_treatment treat_one_path(struct dir_struct *dir,1449 struct untracked_cache_dir *untracked,1450 struct strbuf *path,1451 int baselen,1452 const struct path_simplify *simplify,1453 int dtype, struct dirent *de)1454{1455 int exclude;1456 int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);14571458 if (dtype == DT_UNKNOWN)1459 dtype = get_dtype(de, path->buf, path->len);14601461 /* Always exclude indexed files */1462 if (dtype != DT_DIR && has_path_in_index)1463 return path_none;14641465 /*1466 * When we are looking at a directory P in the working tree,1467 * there are three cases:1468 *1469 * (1) P exists in the index. Everything inside the directory P in1470 * the working tree needs to go when P is checked out from the1471 * index.1472 *1473 * (2) P does not exist in the index, but there is P/Q in the index.1474 * We know P will stay a directory when we check out the contents1475 * of the index, but we do not know yet if there is a directory1476 * P/Q in the working tree to be killed, so we need to recurse.1477 *1478 * (3) P does not exist in the index, and there is no P/Q in the index1479 * to require P to be a directory, either. Only in this case, we1480 * know that everything inside P will not be killed without1481 * recursing.1482 */1483 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1484 (dtype == DT_DIR) &&1485 !has_path_in_index &&1486 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))1487 return path_none;14881489 exclude = is_excluded(dir, path->buf, &dtype);14901491 /*1492 * Excluded? If we don't explicitly want to show1493 * ignored files, ignore it1494 */1495 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1496 return path_excluded;14971498 switch (dtype) {1499 default:1500 return path_none;1501 case DT_DIR:1502 strbuf_addch(path, '/');1503 return treat_directory(dir, untracked, path->buf, path->len,1504 baselen, exclude, simplify);1505 case DT_REG:1506 case DT_LNK:1507 return exclude ? path_excluded : path_untracked;1508 }1509}15101511static enum path_treatment treat_path_fast(struct dir_struct *dir,1512 struct untracked_cache_dir *untracked,1513 struct cached_dir *cdir,1514 struct strbuf *path,1515 int baselen,1516 const struct path_simplify *simplify)1517{1518 strbuf_setlen(path, baselen);1519 if (!cdir->ucd) {1520 strbuf_addstr(path, cdir->file);1521 return path_untracked;1522 }1523 strbuf_addstr(path, cdir->ucd->name);1524 /* treat_one_path() does this before it calls treat_directory() */1525 strbuf_complete(path, '/');1526 if (cdir->ucd->check_only)1527 /*1528 * check_only is set as a result of treat_directory() getting1529 * to its bottom. Verify again the same set of directories1530 * with check_only set.1531 */1532 return read_directory_recursive(dir, path->buf, path->len,1533 cdir->ucd, 1, simplify);1534 /*1535 * We get path_recurse in the first run when1536 * directory_exists_in_index() returns index_nonexistent. We1537 * are sure that new changes in the index does not impact the1538 * outcome. Return now.1539 */1540 return path_recurse;1541}15421543static enum path_treatment treat_path(struct dir_struct *dir,1544 struct untracked_cache_dir *untracked,1545 struct cached_dir *cdir,1546 struct strbuf *path,1547 int baselen,1548 const struct path_simplify *simplify)1549{1550 int dtype;1551 struct dirent *de = cdir->de;15521553 if (!de)1554 return treat_path_fast(dir, untracked, cdir, path,1555 baselen, simplify);1556 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))1557 return path_none;1558 strbuf_setlen(path, baselen);1559 strbuf_addstr(path, de->d_name);1560 if (simplify_away(path->buf, path->len, simplify))1561 return path_none;15621563 dtype = DTYPE(de);1564 return treat_one_path(dir, untracked, path, baselen, simplify, dtype, de);1565}15661567static void add_untracked(struct untracked_cache_dir *dir, const char *name)1568{1569 if (!dir)1570 return;1571 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,1572 dir->untracked_alloc);1573 dir->untracked[dir->untracked_nr++] = xstrdup(name);1574}15751576static int valid_cached_dir(struct dir_struct *dir,1577 struct untracked_cache_dir *untracked,1578 struct strbuf *path,1579 int check_only)1580{1581 struct stat st;15821583 if (!untracked)1584 return 0;15851586 if (stat(path->len ? path->buf : ".", &st)) {1587 invalidate_directory(dir->untracked, untracked);1588 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));1589 return 0;1590 }1591 if (!untracked->valid ||1592 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {1593 if (untracked->valid)1594 invalidate_directory(dir->untracked, untracked);1595 fill_stat_data(&untracked->stat_data, &st);1596 return 0;1597 }15981599 if (untracked->check_only != !!check_only) {1600 invalidate_directory(dir->untracked, untracked);1601 return 0;1602 }16031604 /*1605 * prep_exclude will be called eventually on this directory,1606 * but it's called much later in last_exclude_matching(). We1607 * need it now to determine the validity of the cache for this1608 * path. The next calls will be nearly no-op, the way1609 * prep_exclude() is designed.1610 */1611 if (path->len && path->buf[path->len - 1] != '/') {1612 strbuf_addch(path, '/');1613 prep_exclude(dir, path->buf, path->len);1614 strbuf_setlen(path, path->len - 1);1615 } else1616 prep_exclude(dir, path->buf, path->len);16171618 /* hopefully prep_exclude() haven't invalidated this entry... */1619 return untracked->valid;1620}16211622static int open_cached_dir(struct cached_dir *cdir,1623 struct dir_struct *dir,1624 struct untracked_cache_dir *untracked,1625 struct strbuf *path,1626 int check_only)1627{1628 memset(cdir, 0, sizeof(*cdir));1629 cdir->untracked = untracked;1630 if (valid_cached_dir(dir, untracked, path, check_only))1631 return 0;1632 cdir->fdir = opendir(path->len ? path->buf : ".");1633 if (dir->untracked)1634 dir->untracked->dir_opened++;1635 if (!cdir->fdir)1636 return -1;1637 return 0;1638}16391640static int read_cached_dir(struct cached_dir *cdir)1641{1642 if (cdir->fdir) {1643 cdir->de = readdir(cdir->fdir);1644 if (!cdir->de)1645 return -1;1646 return 0;1647 }1648 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {1649 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1650 if (!d->recurse) {1651 cdir->nr_dirs++;1652 continue;1653 }1654 cdir->ucd = d;1655 cdir->nr_dirs++;1656 return 0;1657 }1658 cdir->ucd = NULL;1659 if (cdir->nr_files < cdir->untracked->untracked_nr) {1660 struct untracked_cache_dir *d = cdir->untracked;1661 cdir->file = d->untracked[cdir->nr_files++];1662 return 0;1663 }1664 return -1;1665}16661667static void close_cached_dir(struct cached_dir *cdir)1668{1669 if (cdir->fdir)1670 closedir(cdir->fdir);1671 /*1672 * We have gone through this directory and found no untracked1673 * entries. Mark it valid.1674 */1675 if (cdir->untracked) {1676 cdir->untracked->valid = 1;1677 cdir->untracked->recurse = 1;1678 }1679}16801681/*1682 * Read a directory tree. We currently ignore anything but1683 * directories, regular files and symlinks. That's because git1684 * doesn't handle them at all yet. Maybe that will change some1685 * day.1686 *1687 * Also, we ignore the name ".git" (even if it is not a directory).1688 * That likely will not change.1689 *1690 * Returns the most significant path_treatment value encountered in the scan.1691 */1692static enum path_treatment read_directory_recursive(struct dir_struct *dir,1693 const char *base, int baselen,1694 struct untracked_cache_dir *untracked, int check_only,1695 const struct path_simplify *simplify)1696{1697 struct cached_dir cdir;1698 enum path_treatment state, subdir_state, dir_state = path_none;1699 struct strbuf path = STRBUF_INIT;1700 static int level = 0;17011702 strbuf_add(&path, base, baselen);17031704 trace_printf_key(&trace_exclude, "exclude: [%d] enter '%.*s'\n",1705 level++, baselen, base);17061707 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))1708 goto out;17091710 if (untracked)1711 untracked->check_only = !!check_only;17121713 while (!read_cached_dir(&cdir)) {1714 /* check how the file or directory should be treated */1715 state = treat_path(dir, untracked, &cdir, &path, baselen, simplify);17161717 if (state > dir_state)1718 dir_state = state;17191720 /* recurse into subdir if instructed by treat_path */1721 if (state == path_recurse) {1722 struct untracked_cache_dir *ud;1723 ud = lookup_untracked(dir->untracked, untracked,1724 path.buf + baselen,1725 path.len - baselen);1726 subdir_state =1727 read_directory_recursive(dir, path.buf, path.len,1728 ud, check_only, simplify);1729 if (subdir_state > dir_state)1730 dir_state = subdir_state;1731 }17321733 if (check_only) {1734 /* abort early if maximum state has been reached */1735 if (dir_state == path_untracked) {1736 if (cdir.fdir)1737 add_untracked(untracked, path.buf + baselen);1738 break;1739 }1740 /* skip the dir_add_* part */1741 continue;1742 }17431744 /* add the path to the appropriate result list */1745 switch (state) {1746 case path_excluded:1747 if (dir->flags & DIR_SHOW_IGNORED)1748 dir_add_name(dir, path.buf, path.len);1749 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||1750 ((dir->flags & DIR_COLLECT_IGNORED) &&1751 exclude_matches_pathspec(path.buf, path.len,1752 simplify)))1753 dir_add_ignored(dir, path.buf, path.len);1754 break;17551756 case path_untracked:1757 if (dir->flags & DIR_SHOW_IGNORED)1758 break;1759 dir_add_name(dir, path.buf, path.len);1760 if (cdir.fdir)1761 add_untracked(untracked, path.buf + baselen);1762 break;17631764 default:1765 break;1766 }1767 }1768 close_cached_dir(&cdir);1769 out:1770 trace_printf_key(&trace_exclude, "exclude: [%d] leave '%.*s'\n",1771 --level, baselen, base);1772 strbuf_release(&path);17731774 return dir_state;1775}17761777static int cmp_name(const void *p1, const void *p2)1778{1779 const struct dir_entry *e1 = *(const struct dir_entry **)p1;1780 const struct dir_entry *e2 = *(const struct dir_entry **)p2;17811782 return name_compare(e1->name, e1->len, e2->name, e2->len);1783}17841785static struct path_simplify *create_simplify(const char **pathspec)1786{1787 int nr, alloc = 0;1788 struct path_simplify *simplify = NULL;17891790 if (!pathspec)1791 return NULL;17921793 for (nr = 0 ; ; nr++) {1794 const char *match;1795 ALLOC_GROW(simplify, nr + 1, alloc);1796 match = *pathspec++;1797 if (!match)1798 break;1799 simplify[nr].path = match;1800 simplify[nr].len = simple_length(match);1801 }1802 simplify[nr].path = NULL;1803 simplify[nr].len = 0;1804 return simplify;1805}18061807static void free_simplify(struct path_simplify *simplify)1808{1809 free(simplify);1810}18111812static int treat_leading_path(struct dir_struct *dir,1813 const char *path, int len,1814 const struct path_simplify *simplify)1815{1816 struct strbuf sb = STRBUF_INIT;1817 int baselen, rc = 0;1818 const char *cp;1819 int old_flags = dir->flags;18201821 while (len && path[len - 1] == '/')1822 len--;1823 if (!len)1824 return 1;1825 baselen = 0;1826 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;1827 while (1) {1828 cp = path + baselen + !!baselen;1829 cp = memchr(cp, '/', path + len - cp);1830 if (!cp)1831 baselen = len;1832 else1833 baselen = cp - path;1834 strbuf_setlen(&sb, 0);1835 strbuf_add(&sb, path, baselen);1836 if (!is_directory(sb.buf))1837 break;1838 if (simplify_away(sb.buf, sb.len, simplify))1839 break;1840 if (treat_one_path(dir, NULL, &sb, baselen, simplify,1841 DT_DIR, NULL) == path_none)1842 break; /* do not recurse into it */1843 if (len <= baselen) {1844 rc = 1;1845 break; /* finished checking */1846 }1847 }1848 strbuf_release(&sb);1849 dir->flags = old_flags;1850 return rc;1851}18521853static const char *get_ident_string(void)1854{1855 static struct strbuf sb = STRBUF_INIT;1856 struct utsname uts;18571858 if (sb.len)1859 return sb.buf;1860 if (uname(&uts) < 0)1861 die_errno(_("failed to get kernel name and information"));1862 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),1863 uts.sysname);1864 return sb.buf;1865}18661867static int ident_in_untracked(const struct untracked_cache *uc)1868{1869 /*1870 * Previous git versions may have saved many NUL separated1871 * strings in the "ident" field, but it is insane to manage1872 * many locations, so just take care of the first one.1873 */18741875 return !strcmp(uc->ident.buf, get_ident_string());1876}18771878static void set_untracked_ident(struct untracked_cache *uc)1879{1880 strbuf_reset(&uc->ident);1881 strbuf_addstr(&uc->ident, get_ident_string());18821883 /*1884 * This strbuf used to contain a list of NUL separated1885 * strings, so save NUL too for backward compatibility.1886 */1887 strbuf_addch(&uc->ident, 0);1888}18891890static void new_untracked_cache(struct index_state *istate)1891{1892 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));1893 strbuf_init(&uc->ident, 100);1894 uc->exclude_per_dir = ".gitignore";1895 /* should be the same flags used by git-status */1896 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;1897 set_untracked_ident(uc);1898 istate->untracked = uc;1899 istate->cache_changed |= UNTRACKED_CHANGED;1900}19011902void add_untracked_cache(struct index_state *istate)1903{1904 if (!istate->untracked) {1905 new_untracked_cache(istate);1906 } else {1907 if (!ident_in_untracked(istate->untracked)) {1908 free_untracked_cache(istate->untracked);1909 new_untracked_cache(istate);1910 }1911 }1912}19131914void remove_untracked_cache(struct index_state *istate)1915{1916 if (istate->untracked) {1917 free_untracked_cache(istate->untracked);1918 istate->untracked = NULL;1919 istate->cache_changed |= UNTRACKED_CHANGED;1920 }1921}19221923static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,1924 int base_len,1925 const struct pathspec *pathspec)1926{1927 struct untracked_cache_dir *root;19281929 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))1930 return NULL;19311932 /*1933 * We only support $GIT_DIR/info/exclude and core.excludesfile1934 * as the global ignore rule files. Any other additions1935 * (e.g. from command line) invalidate the cache. This1936 * condition also catches running setup_standard_excludes()1937 * before setting dir->untracked!1938 */1939 if (dir->unmanaged_exclude_files)1940 return NULL;19411942 /*1943 * Optimize for the main use case only: whole-tree git1944 * status. More work involved in treat_leading_path() if we1945 * use cache on just a subset of the worktree. pathspec1946 * support could make the matter even worse.1947 */1948 if (base_len || (pathspec && pathspec->nr))1949 return NULL;19501951 /* Different set of flags may produce different results */1952 if (dir->flags != dir->untracked->dir_flags ||1953 /*1954 * See treat_directory(), case index_nonexistent. Without1955 * this flag, we may need to also cache .git file content1956 * for the resolve_gitlink_ref() call, which we don't.1957 */1958 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||1959 /* We don't support collecting ignore files */1960 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |1961 DIR_COLLECT_IGNORED)))1962 return NULL;19631964 /*1965 * If we use .gitignore in the cache and now you change it to1966 * .gitexclude, everything will go wrong.1967 */1968 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&1969 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))1970 return NULL;19711972 /*1973 * EXC_CMDL is not considered in the cache. If people set it,1974 * skip the cache.1975 */1976 if (dir->exclude_list_group[EXC_CMDL].nr)1977 return NULL;19781979 if (!ident_in_untracked(dir->untracked)) {1980 warning(_("Untracked cache is disabled on this system or location."));1981 return NULL;1982 }19831984 if (!dir->untracked->root) {1985 const int len = sizeof(*dir->untracked->root);1986 dir->untracked->root = xmalloc(len);1987 memset(dir->untracked->root, 0, len);1988 }19891990 /* Validate $GIT_DIR/info/exclude and core.excludesfile */1991 root = dir->untracked->root;1992 if (hashcmp(dir->ss_info_exclude.sha1,1993 dir->untracked->ss_info_exclude.sha1)) {1994 invalidate_gitignore(dir->untracked, root);1995 dir->untracked->ss_info_exclude = dir->ss_info_exclude;1996 }1997 if (hashcmp(dir->ss_excludes_file.sha1,1998 dir->untracked->ss_excludes_file.sha1)) {1999 invalidate_gitignore(dir->untracked, root);2000 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2001 }20022003 /* Make sure this directory is not dropped out at saving phase */2004 root->recurse = 1;2005 return root;2006}20072008int read_directory(struct dir_struct *dir, const char *path, int len, const struct pathspec *pathspec)2009{2010 struct path_simplify *simplify;2011 struct untracked_cache_dir *untracked;20122013 /*2014 * Check out create_simplify()2015 */2016 if (pathspec)2017 GUARD_PATHSPEC(pathspec,2018 PATHSPEC_FROMTOP |2019 PATHSPEC_MAXDEPTH |2020 PATHSPEC_LITERAL |2021 PATHSPEC_GLOB |2022 PATHSPEC_ICASE |2023 PATHSPEC_EXCLUDE);20242025 if (has_symlink_leading_path(path, len))2026 return dir->nr;20272028 /*2029 * exclude patterns are treated like positive ones in2030 * create_simplify. Usually exclude patterns should be a2031 * subset of positive ones, which has no impacts on2032 * create_simplify().2033 */2034 simplify = create_simplify(pathspec ? pathspec->_raw : NULL);2035 untracked = validate_untracked_cache(dir, len, pathspec);2036 if (!untracked)2037 /*2038 * make sure untracked cache code path is disabled,2039 * e.g. prep_exclude()2040 */2041 dir->untracked = NULL;2042 if (!len || treat_leading_path(dir, path, len, simplify))2043 read_directory_recursive(dir, path, len, untracked, 0, simplify);2044 free_simplify(simplify);2045 qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);2046 qsort(dir->ignored, dir->ignored_nr, sizeof(struct dir_entry *), cmp_name);2047 if (dir->untracked) {2048 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);2049 trace_printf_key(&trace_untracked_stats,2050 "node creation: %u\n"2051 "gitignore invalidation: %u\n"2052 "directory invalidation: %u\n"2053 "opendir: %u\n",2054 dir->untracked->dir_created,2055 dir->untracked->gitignore_invalidated,2056 dir->untracked->dir_invalidated,2057 dir->untracked->dir_opened);2058 if (dir->untracked == the_index.untracked &&2059 (dir->untracked->dir_opened ||2060 dir->untracked->gitignore_invalidated ||2061 dir->untracked->dir_invalidated))2062 the_index.cache_changed |= UNTRACKED_CHANGED;2063 if (dir->untracked != the_index.untracked) {2064 free(dir->untracked);2065 dir->untracked = NULL;2066 }2067 }2068 return dir->nr;2069}20702071int file_exists(const char *f)2072{2073 struct stat sb;2074 return lstat(f, &sb) == 0;2075}20762077static int cmp_icase(char a, char b)2078{2079 if (a == b)2080 return 0;2081 if (ignore_case)2082 return toupper(a) - toupper(b);2083 return a - b;2084}20852086/*2087 * Given two normalized paths (a trailing slash is ok), if subdir is2088 * outside dir, return -1. Otherwise return the offset in subdir that2089 * can be used as relative path to dir.2090 */2091int dir_inside_of(const char *subdir, const char *dir)2092{2093 int offset = 0;20942095 assert(dir && subdir && *dir && *subdir);20962097 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {2098 dir++;2099 subdir++;2100 offset++;2101 }21022103 /* hel[p]/me vs hel[l]/yeah */2104 if (*dir && *subdir)2105 return -1;21062107 if (!*subdir)2108 return !*dir ? offset : -1; /* same dir */21092110 /* foo/[b]ar vs foo/[] */2111 if (is_dir_sep(dir[-1]))2112 return is_dir_sep(subdir[-1]) ? offset : -1;21132114 /* foo[/]bar vs foo[] */2115 return is_dir_sep(*subdir) ? offset + 1 : -1;2116}21172118int is_inside_dir(const char *dir)2119{2120 char *cwd;2121 int rc;21222123 if (!dir)2124 return 0;21252126 cwd = xgetcwd();2127 rc = (dir_inside_of(cwd, dir) >= 0);2128 free(cwd);2129 return rc;2130}21312132int is_empty_dir(const char *path)2133{2134 DIR *dir = opendir(path);2135 struct dirent *e;2136 int ret = 1;21372138 if (!dir)2139 return 0;21402141 while ((e = readdir(dir)) != NULL)2142 if (!is_dot_or_dotdot(e->d_name)) {2143 ret = 0;2144 break;2145 }21462147 closedir(dir);2148 return ret;2149}21502151static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)2152{2153 DIR *dir;2154 struct dirent *e;2155 int ret = 0, original_len = path->len, len, kept_down = 0;2156 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2157 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2158 unsigned char submodule_head[20];21592160 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2161 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {2162 /* Do not descend and nuke a nested git work tree. */2163 if (kept_up)2164 *kept_up = 1;2165 return 0;2166 }21672168 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2169 dir = opendir(path->buf);2170 if (!dir) {2171 if (errno == ENOENT)2172 return keep_toplevel ? -1 : 0;2173 else if (errno == EACCES && !keep_toplevel)2174 /*2175 * An empty dir could be removable even if it2176 * is unreadable:2177 */2178 return rmdir(path->buf);2179 else2180 return -1;2181 }2182 strbuf_complete(path, '/');21832184 len = path->len;2185 while ((e = readdir(dir)) != NULL) {2186 struct stat st;2187 if (is_dot_or_dotdot(e->d_name))2188 continue;21892190 strbuf_setlen(path, len);2191 strbuf_addstr(path, e->d_name);2192 if (lstat(path->buf, &st)) {2193 if (errno == ENOENT)2194 /*2195 * file disappeared, which is what we2196 * wanted anyway2197 */2198 continue;2199 /* fall thru */2200 } else if (S_ISDIR(st.st_mode)) {2201 if (!remove_dir_recurse(path, flag, &kept_down))2202 continue; /* happy */2203 } else if (!only_empty &&2204 (!unlink(path->buf) || errno == ENOENT)) {2205 continue; /* happy, too */2206 }22072208 /* path too long, stat fails, or non-directory still exists */2209 ret = -1;2210 break;2211 }2212 closedir(dir);22132214 strbuf_setlen(path, original_len);2215 if (!ret && !keep_toplevel && !kept_down)2216 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;2217 else if (kept_up)2218 /*2219 * report the uplevel that it is not an error that we2220 * did not rmdir() our directory.2221 */2222 *kept_up = !ret;2223 return ret;2224}22252226int remove_dir_recursively(struct strbuf *path, int flag)2227{2228 return remove_dir_recurse(path, flag, NULL);2229}22302231static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")22322233void setup_standard_excludes(struct dir_struct *dir)2234{2235 const char *path;22362237 dir->exclude_per_dir = ".gitignore";22382239 /* core.excludefile defaulting to $XDG_HOME/git/ignore */2240 if (!excludes_file)2241 excludes_file = xdg_config_home("ignore");2242 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))2243 add_excludes_from_file_1(dir, excludes_file,2244 dir->untracked ? &dir->ss_excludes_file : NULL);22452246 /* per repository user preference */2247 path = git_path_info_exclude();2248 if (!access_or_warn(path, R_OK, 0))2249 add_excludes_from_file_1(dir, path,2250 dir->untracked ? &dir->ss_info_exclude : NULL);2251}22522253int remove_path(const char *name)2254{2255 char *slash;22562257 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)2258 return -1;22592260 slash = strrchr(name, '/');2261 if (slash) {2262 char *dirs = xstrdup(name);2263 slash = dirs + (slash - name);2264 do {2265 *slash = '\0';2266 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));2267 free(dirs);2268 }2269 return 0;2270}22712272/*2273 * Frees memory within dir which was allocated for exclude lists and2274 * the exclude_stack. Does not free dir itself.2275 */2276void clear_directory(struct dir_struct *dir)2277{2278 int i, j;2279 struct exclude_list_group *group;2280 struct exclude_list *el;2281 struct exclude_stack *stk;22822283 for (i = EXC_CMDL; i <= EXC_FILE; i++) {2284 group = &dir->exclude_list_group[i];2285 for (j = 0; j < group->nr; j++) {2286 el = &group->el[j];2287 if (i == EXC_DIRS)2288 free((char *)el->src);2289 clear_exclude_list(el);2290 }2291 free(group->el);2292 }22932294 stk = dir->exclude_stack;2295 while (stk) {2296 struct exclude_stack *prev = stk->prev;2297 free(stk);2298 stk = prev;2299 }2300 strbuf_release(&dir->basebuf);2301}23022303struct ondisk_untracked_cache {2304 struct stat_data info_exclude_stat;2305 struct stat_data excludes_file_stat;2306 uint32_t dir_flags;2307 unsigned char info_exclude_sha1[20];2308 unsigned char excludes_file_sha1[20];2309 char exclude_per_dir[FLEX_ARRAY];2310};23112312#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)23132314struct write_data {2315 int index; /* number of written untracked_cache_dir */2316 struct ewah_bitmap *check_only; /* from untracked_cache_dir */2317 struct ewah_bitmap *valid; /* from untracked_cache_dir */2318 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */2319 struct strbuf out;2320 struct strbuf sb_stat;2321 struct strbuf sb_sha1;2322};23232324static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)2325{2326 to->sd_ctime.sec = htonl(from->sd_ctime.sec);2327 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);2328 to->sd_mtime.sec = htonl(from->sd_mtime.sec);2329 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);2330 to->sd_dev = htonl(from->sd_dev);2331 to->sd_ino = htonl(from->sd_ino);2332 to->sd_uid = htonl(from->sd_uid);2333 to->sd_gid = htonl(from->sd_gid);2334 to->sd_size = htonl(from->sd_size);2335}23362337static void write_one_dir(struct untracked_cache_dir *untracked,2338 struct write_data *wd)2339{2340 struct stat_data stat_data;2341 struct strbuf *out = &wd->out;2342 unsigned char intbuf[16];2343 unsigned int intlen, value;2344 int i = wd->index++;23452346 /*2347 * untracked_nr should be reset whenever valid is clear, but2348 * for safety..2349 */2350 if (!untracked->valid) {2351 untracked->untracked_nr = 0;2352 untracked->check_only = 0;2353 }23542355 if (untracked->check_only)2356 ewah_set(wd->check_only, i);2357 if (untracked->valid) {2358 ewah_set(wd->valid, i);2359 stat_data_to_disk(&stat_data, &untracked->stat_data);2360 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));2361 }2362 if (!is_null_sha1(untracked->exclude_sha1)) {2363 ewah_set(wd->sha1_valid, i);2364 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);2365 }23662367 intlen = encode_varint(untracked->untracked_nr, intbuf);2368 strbuf_add(out, intbuf, intlen);23692370 /* skip non-recurse directories */2371 for (i = 0, value = 0; i < untracked->dirs_nr; i++)2372 if (untracked->dirs[i]->recurse)2373 value++;2374 intlen = encode_varint(value, intbuf);2375 strbuf_add(out, intbuf, intlen);23762377 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);23782379 for (i = 0; i < untracked->untracked_nr; i++)2380 strbuf_add(out, untracked->untracked[i],2381 strlen(untracked->untracked[i]) + 1);23822383 for (i = 0; i < untracked->dirs_nr; i++)2384 if (untracked->dirs[i]->recurse)2385 write_one_dir(untracked->dirs[i], wd);2386}23872388void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)2389{2390 struct ondisk_untracked_cache *ouc;2391 struct write_data wd;2392 unsigned char varbuf[16];2393 int len = 0, varint_len;2394 if (untracked->exclude_per_dir)2395 len = strlen(untracked->exclude_per_dir);2396 ouc = xmalloc(sizeof(*ouc) + len + 1);2397 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2398 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2399 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);2400 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);2401 ouc->dir_flags = htonl(untracked->dir_flags);2402 memcpy(ouc->exclude_per_dir, untracked->exclude_per_dir, len + 1);24032404 varint_len = encode_varint(untracked->ident.len, varbuf);2405 strbuf_add(out, varbuf, varint_len);2406 strbuf_add(out, untracked->ident.buf, untracked->ident.len);24072408 strbuf_add(out, ouc, ouc_size(len));2409 free(ouc);2410 ouc = NULL;24112412 if (!untracked->root) {2413 varint_len = encode_varint(0, varbuf);2414 strbuf_add(out, varbuf, varint_len);2415 return;2416 }24172418 wd.index = 0;2419 wd.check_only = ewah_new();2420 wd.valid = ewah_new();2421 wd.sha1_valid = ewah_new();2422 strbuf_init(&wd.out, 1024);2423 strbuf_init(&wd.sb_stat, 1024);2424 strbuf_init(&wd.sb_sha1, 1024);2425 write_one_dir(untracked->root, &wd);24262427 varint_len = encode_varint(wd.index, varbuf);2428 strbuf_add(out, varbuf, varint_len);2429 strbuf_addbuf(out, &wd.out);2430 ewah_serialize_strbuf(wd.valid, out);2431 ewah_serialize_strbuf(wd.check_only, out);2432 ewah_serialize_strbuf(wd.sha1_valid, out);2433 strbuf_addbuf(out, &wd.sb_stat);2434 strbuf_addbuf(out, &wd.sb_sha1);2435 strbuf_addch(out, '\0'); /* safe guard for string lists */24362437 ewah_free(wd.valid);2438 ewah_free(wd.check_only);2439 ewah_free(wd.sha1_valid);2440 strbuf_release(&wd.out);2441 strbuf_release(&wd.sb_stat);2442 strbuf_release(&wd.sb_sha1);2443}24442445static void free_untracked(struct untracked_cache_dir *ucd)2446{2447 int i;2448 if (!ucd)2449 return;2450 for (i = 0; i < ucd->dirs_nr; i++)2451 free_untracked(ucd->dirs[i]);2452 for (i = 0; i < ucd->untracked_nr; i++)2453 free(ucd->untracked[i]);2454 free(ucd->untracked);2455 free(ucd->dirs);2456 free(ucd);2457}24582459void free_untracked_cache(struct untracked_cache *uc)2460{2461 if (uc)2462 free_untracked(uc->root);2463 free(uc);2464}24652466struct read_data {2467 int index;2468 struct untracked_cache_dir **ucd;2469 struct ewah_bitmap *check_only;2470 struct ewah_bitmap *valid;2471 struct ewah_bitmap *sha1_valid;2472 const unsigned char *data;2473 const unsigned char *end;2474};24752476static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)2477{2478 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);2479 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);2480 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);2481 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);2482 to->sd_dev = get_be32(&from->sd_dev);2483 to->sd_ino = get_be32(&from->sd_ino);2484 to->sd_uid = get_be32(&from->sd_uid);2485 to->sd_gid = get_be32(&from->sd_gid);2486 to->sd_size = get_be32(&from->sd_size);2487}24882489static int read_one_dir(struct untracked_cache_dir **untracked_,2490 struct read_data *rd)2491{2492 struct untracked_cache_dir ud, *untracked;2493 const unsigned char *next, *data = rd->data, *end = rd->end;2494 unsigned int value;2495 int i, len;24962497 memset(&ud, 0, sizeof(ud));24982499 next = data;2500 value = decode_varint(&next);2501 if (next > end)2502 return -1;2503 ud.recurse = 1;2504 ud.untracked_alloc = value;2505 ud.untracked_nr = value;2506 if (ud.untracked_nr)2507 ud.untracked = xmalloc(sizeof(*ud.untracked) * ud.untracked_nr);2508 data = next;25092510 next = data;2511 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);2512 if (next > end)2513 return -1;2514 ud.dirs = xmalloc(sizeof(*ud.dirs) * ud.dirs_nr);2515 data = next;25162517 len = strlen((const char *)data);2518 next = data + len + 1;2519 if (next > rd->end)2520 return -1;2521 *untracked_ = untracked = xmalloc(sizeof(*untracked) + len);2522 memcpy(untracked, &ud, sizeof(ud));2523 memcpy(untracked->name, data, len + 1);2524 data = next;25252526 for (i = 0; i < untracked->untracked_nr; i++) {2527 len = strlen((const char *)data);2528 next = data + len + 1;2529 if (next > rd->end)2530 return -1;2531 untracked->untracked[i] = xstrdup((const char*)data);2532 data = next;2533 }25342535 rd->ucd[rd->index++] = untracked;2536 rd->data = data;25372538 for (i = 0; i < untracked->dirs_nr; i++) {2539 len = read_one_dir(untracked->dirs + i, rd);2540 if (len < 0)2541 return -1;2542 }2543 return 0;2544}25452546static void set_check_only(size_t pos, void *cb)2547{2548 struct read_data *rd = cb;2549 struct untracked_cache_dir *ud = rd->ucd[pos];2550 ud->check_only = 1;2551}25522553static void read_stat(size_t pos, void *cb)2554{2555 struct read_data *rd = cb;2556 struct untracked_cache_dir *ud = rd->ucd[pos];2557 if (rd->data + sizeof(struct stat_data) > rd->end) {2558 rd->data = rd->end + 1;2559 return;2560 }2561 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);2562 rd->data += sizeof(struct stat_data);2563 ud->valid = 1;2564}25652566static void read_sha1(size_t pos, void *cb)2567{2568 struct read_data *rd = cb;2569 struct untracked_cache_dir *ud = rd->ucd[pos];2570 if (rd->data + 20 > rd->end) {2571 rd->data = rd->end + 1;2572 return;2573 }2574 hashcpy(ud->exclude_sha1, rd->data);2575 rd->data += 20;2576}25772578static void load_sha1_stat(struct sha1_stat *sha1_stat,2579 const struct stat_data *stat,2580 const unsigned char *sha1)2581{2582 stat_data_from_disk(&sha1_stat->stat, stat);2583 hashcpy(sha1_stat->sha1, sha1);2584 sha1_stat->valid = 1;2585}25862587struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)2588{2589 const struct ondisk_untracked_cache *ouc;2590 struct untracked_cache *uc;2591 struct read_data rd;2592 const unsigned char *next = data, *end = (const unsigned char *)data + sz;2593 const char *ident;2594 int ident_len, len;25952596 if (sz <= 1 || end[-1] != '\0')2597 return NULL;2598 end--;25992600 ident_len = decode_varint(&next);2601 if (next + ident_len > end)2602 return NULL;2603 ident = (const char *)next;2604 next += ident_len;26052606 ouc = (const struct ondisk_untracked_cache *)next;2607 if (next + ouc_size(0) > end)2608 return NULL;26092610 uc = xcalloc(1, sizeof(*uc));2611 strbuf_init(&uc->ident, ident_len);2612 strbuf_add(&uc->ident, ident, ident_len);2613 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,2614 ouc->info_exclude_sha1);2615 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,2616 ouc->excludes_file_sha1);2617 uc->dir_flags = get_be32(&ouc->dir_flags);2618 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);2619 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */2620 next += ouc_size(strlen(ouc->exclude_per_dir));2621 if (next >= end)2622 goto done2;26232624 len = decode_varint(&next);2625 if (next > end || len == 0)2626 goto done2;26272628 rd.valid = ewah_new();2629 rd.check_only = ewah_new();2630 rd.sha1_valid = ewah_new();2631 rd.data = next;2632 rd.end = end;2633 rd.index = 0;2634 rd.ucd = xmalloc(sizeof(*rd.ucd) * len);26352636 if (read_one_dir(&uc->root, &rd) || rd.index != len)2637 goto done;26382639 next = rd.data;2640 len = ewah_read_mmap(rd.valid, next, end - next);2641 if (len < 0)2642 goto done;26432644 next += len;2645 len = ewah_read_mmap(rd.check_only, next, end - next);2646 if (len < 0)2647 goto done;26482649 next += len;2650 len = ewah_read_mmap(rd.sha1_valid, next, end - next);2651 if (len < 0)2652 goto done;26532654 ewah_each_bit(rd.check_only, set_check_only, &rd);2655 rd.data = next + len;2656 ewah_each_bit(rd.valid, read_stat, &rd);2657 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);2658 next = rd.data;26592660done:2661 free(rd.ucd);2662 ewah_free(rd.valid);2663 ewah_free(rd.check_only);2664 ewah_free(rd.sha1_valid);2665done2:2666 if (next != end) {2667 free_untracked_cache(uc);2668 uc = NULL;2669 }2670 return uc;2671}26722673static void invalidate_one_directory(struct untracked_cache *uc,2674 struct untracked_cache_dir *ucd)2675{2676 uc->dir_invalidated++;2677 ucd->valid = 0;2678 ucd->untracked_nr = 0;2679}26802681/*2682 * Normally when an entry is added or removed from a directory,2683 * invalidating that directory is enough. No need to touch its2684 * ancestors. When a directory is shown as "foo/bar/" in git-status2685 * however, deleting or adding an entry may have cascading effect.2686 *2687 * Say the "foo/bar/file" has become untracked, we need to tell the2688 * untracked_cache_dir of "foo" that "bar/" is not an untracked2689 * directory any more (because "bar" is managed by foo as an untracked2690 * "file").2691 *2692 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2693 * was the last untracked entry in the entire "foo", we should show2694 * "foo/" instead. Which means we have to invalidate past "bar" up to2695 * "foo".2696 *2697 * This function traverses all directories from root to leaf. If there2698 * is a chance of one of the above cases happening, we invalidate back2699 * to root. Otherwise we just invalidate the leaf. There may be a more2700 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2701 * detect these cases and avoid unnecessary invalidation, for example,2702 * checking for the untracked entry named "bar/" in "foo", but for now2703 * stick to something safe and simple.2704 */2705static int invalidate_one_component(struct untracked_cache *uc,2706 struct untracked_cache_dir *dir,2707 const char *path, int len)2708{2709 const char *rest = strchr(path, '/');27102711 if (rest) {2712 int component_len = rest - path;2713 struct untracked_cache_dir *d =2714 lookup_untracked(uc, dir, path, component_len);2715 int ret =2716 invalidate_one_component(uc, d, rest + 1,2717 len - (component_len + 1));2718 if (ret)2719 invalidate_one_directory(uc, dir);2720 return ret;2721 }27222723 invalidate_one_directory(uc, dir);2724 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2725}27262727void untracked_cache_invalidate_path(struct index_state *istate,2728 const char *path)2729{2730 if (!istate->untracked || !istate->untracked->root)2731 return;2732 invalidate_one_component(istate->untracked, istate->untracked->root,2733 path, strlen(path));2734}27352736void untracked_cache_remove_from_index(struct index_state *istate,2737 const char *path)2738{2739 untracked_cache_invalidate_path(istate, path);2740}27412742void untracked_cache_add_to_index(struct index_state *istate,2743 const char *path)2744{2745 untracked_cache_invalidate_path(istate, path);2746}