1/* 2 * This handles recursive filename detection with exclude 3 * files, index knowledge etc.. 4 * 5 * See Documentation/technical/api-directory-listing.txt 6 * 7 * Copyright (C) Linus Torvalds, 2005-2006 8 * Junio Hamano, 2005-2006 9 */ 10#define NO_THE_INDEX_COMPATIBILITY_MACROS 11#include"cache.h" 12#include"dir.h" 13#include"attr.h" 14#include"refs.h" 15#include"wildmatch.h" 16#include"pathspec.h" 17#include"utf8.h" 18#include"varint.h" 19#include"ewah/ewok.h" 20 21/* 22 * Tells read_directory_recursive how a file or directory should be treated. 23 * Values are ordered by significance, e.g. if a directory contains both 24 * excluded and untracked files, it is listed as untracked because 25 * path_untracked > path_excluded. 26 */ 27enum path_treatment { 28 path_none =0, 29 path_recurse, 30 path_excluded, 31 path_untracked 32}; 33 34/* 35 * Support data structure for our opendir/readdir/closedir wrappers 36 */ 37struct cached_dir { 38DIR*fdir; 39struct untracked_cache_dir *untracked; 40int nr_files; 41int nr_dirs; 42 43struct dirent *de; 44const char*file; 45struct untracked_cache_dir *ucd; 46}; 47 48static enum path_treatment read_directory_recursive(struct dir_struct *dir, 49const char*path,int len,struct untracked_cache_dir *untracked, 50int check_only,const struct pathspec *pathspec); 51static intget_dtype(struct dirent *de,struct index_state *istate, 52const char*path,int len); 53 54intfspathcmp(const char*a,const char*b) 55{ 56return ignore_case ?strcasecmp(a, b) :strcmp(a, b); 57} 58 59intfspathncmp(const char*a,const char*b,size_t count) 60{ 61return ignore_case ?strncasecmp(a, b, count) :strncmp(a, b, count); 62} 63 64intgit_fnmatch(const struct pathspec_item *item, 65const char*pattern,const char*string, 66int prefix) 67{ 68if(prefix >0) { 69if(ps_strncmp(item, pattern, string, prefix)) 70return WM_NOMATCH; 71 pattern += prefix; 72 string += prefix; 73} 74if(item->flags & PATHSPEC_ONESTAR) { 75int pattern_len =strlen(++pattern); 76int string_len =strlen(string); 77return string_len < pattern_len || 78ps_strcmp(item, pattern, 79 string + string_len - pattern_len); 80} 81if(item->magic & PATHSPEC_GLOB) 82returnwildmatch(pattern, string, 83 WM_PATHNAME | 84(item->magic & PATHSPEC_ICASE ? WM_CASEFOLD :0), 85 NULL); 86else 87/* wildmatch has not learned no FNM_PATHNAME mode yet */ 88returnwildmatch(pattern, string, 89 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD :0, 90 NULL); 91} 92 93static intfnmatch_icase_mem(const char*pattern,int patternlen, 94const char*string,int stringlen, 95int flags) 96{ 97int match_status; 98struct strbuf pat_buf = STRBUF_INIT; 99struct strbuf str_buf = STRBUF_INIT; 100const char*use_pat = pattern; 101const char*use_str = string; 102 103if(pattern[patternlen]) { 104strbuf_add(&pat_buf, pattern, patternlen); 105 use_pat = pat_buf.buf; 106} 107if(string[stringlen]) { 108strbuf_add(&str_buf, string, stringlen); 109 use_str = str_buf.buf; 110} 111 112if(ignore_case) 113 flags |= WM_CASEFOLD; 114 match_status =wildmatch(use_pat, use_str, flags, NULL); 115 116strbuf_release(&pat_buf); 117strbuf_release(&str_buf); 118 119return match_status; 120} 121 122static size_tcommon_prefix_len(const struct pathspec *pathspec) 123{ 124int n; 125size_t max =0; 126 127/* 128 * ":(icase)path" is treated as a pathspec full of 129 * wildcard. In other words, only prefix is considered common 130 * prefix. If the pathspec is abc/foo abc/bar, running in 131 * subdir xyz, the common prefix is still xyz, not xuz/abc as 132 * in non-:(icase). 133 */ 134GUARD_PATHSPEC(pathspec, 135 PATHSPEC_FROMTOP | 136 PATHSPEC_MAXDEPTH | 137 PATHSPEC_LITERAL | 138 PATHSPEC_GLOB | 139 PATHSPEC_ICASE | 140 PATHSPEC_EXCLUDE | 141 PATHSPEC_ATTR); 142 143for(n =0; n < pathspec->nr; n++) { 144size_t i =0, len =0, item_len; 145if(pathspec->items[n].magic & PATHSPEC_EXCLUDE) 146continue; 147if(pathspec->items[n].magic & PATHSPEC_ICASE) 148 item_len = pathspec->items[n].prefix; 149else 150 item_len = pathspec->items[n].nowildcard_len; 151while(i < item_len && (n ==0|| i < max)) { 152char c = pathspec->items[n].match[i]; 153if(c != pathspec->items[0].match[i]) 154break; 155if(c =='/') 156 len = i +1; 157 i++; 158} 159if(n ==0|| len < max) { 160 max = len; 161if(!max) 162break; 163} 164} 165return max; 166} 167 168/* 169 * Returns a copy of the longest leading path common among all 170 * pathspecs. 171 */ 172char*common_prefix(const struct pathspec *pathspec) 173{ 174unsigned long len =common_prefix_len(pathspec); 175 176return len ?xmemdupz(pathspec->items[0].match, len) : NULL; 177} 178 179intfill_directory(struct dir_struct *dir,const struct pathspec *pathspec) 180{ 181const char*prefix; 182size_t prefix_len; 183 184/* 185 * Calculate common prefix for the pathspec, and 186 * use that to optimize the directory walk 187 */ 188 prefix_len =common_prefix_len(pathspec); 189 prefix = prefix_len ? pathspec->items[0].match :""; 190 191/* Read the directory and prune it */ 192read_directory(dir, prefix, prefix_len, pathspec); 193 194return prefix_len; 195} 196 197intwithin_depth(const char*name,int namelen, 198int depth,int max_depth) 199{ 200const char*cp = name, *cpe = name + namelen; 201 202while(cp < cpe) { 203if(*cp++ !='/') 204continue; 205 depth++; 206if(depth > max_depth) 207return0; 208} 209return1; 210} 211 212#define DO_MATCH_EXCLUDE (1<<0) 213#define DO_MATCH_DIRECTORY (1<<1) 214#define DO_MATCH_SUBMODULE (1<<2) 215 216static intmatch_attrs(const char*name,int namelen, 217const struct pathspec_item *item) 218{ 219int i; 220 221git_check_attr(name, item->attr_check); 222for(i =0; i < item->attr_match_nr; i++) { 223const char*value; 224int matched; 225enum attr_match_mode match_mode; 226 227 value = item->attr_check->items[i].value; 228 match_mode = item->attr_match[i].match_mode; 229 230if(ATTR_TRUE(value)) 231 matched = (match_mode == MATCH_SET); 232else if(ATTR_FALSE(value)) 233 matched = (match_mode == MATCH_UNSET); 234else if(ATTR_UNSET(value)) 235 matched = (match_mode == MATCH_UNSPECIFIED); 236else 237 matched = (match_mode == MATCH_VALUE && 238!strcmp(item->attr_match[i].value, value)); 239if(!matched) 240return0; 241} 242 243return1; 244} 245 246/* 247 * Does 'match' match the given name? 248 * A match is found if 249 * 250 * (1) the 'match' string is leading directory of 'name', or 251 * (2) the 'match' string is a wildcard and matches 'name', or 252 * (3) the 'match' string is exactly the same as 'name'. 253 * 254 * and the return value tells which case it was. 255 * 256 * It returns 0 when there is no match. 257 */ 258static intmatch_pathspec_item(const struct pathspec_item *item,int prefix, 259const char*name,int namelen,unsigned flags) 260{ 261/* name/namelen has prefix cut off by caller */ 262const char*match = item->match + prefix; 263int matchlen = item->len - prefix; 264 265/* 266 * The normal call pattern is: 267 * 1. prefix = common_prefix_len(ps); 268 * 2. prune something, or fill_directory 269 * 3. match_pathspec() 270 * 271 * 'prefix' at #1 may be shorter than the command's prefix and 272 * it's ok for #2 to match extra files. Those extras will be 273 * trimmed at #3. 274 * 275 * Suppose the pathspec is 'foo' and '../bar' running from 276 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 277 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 278 * user does not want XYZ/foo, only the "foo" part should be 279 * case-insensitive. We need to filter out XYZ/foo here. In 280 * other words, we do not trust the caller on comparing the 281 * prefix part when :(icase) is involved. We do exact 282 * comparison ourselves. 283 * 284 * Normally the caller (common_prefix_len() in fact) does 285 * _exact_ matching on name[-prefix+1..-1] and we do not need 286 * to check that part. Be defensive and check it anyway, in 287 * case common_prefix_len is changed, or a new caller is 288 * introduced that does not use common_prefix_len. 289 * 290 * If the penalty turns out too high when prefix is really 291 * long, maybe change it to 292 * strncmp(match, name, item->prefix - prefix) 293 */ 294if(item->prefix && (item->magic & PATHSPEC_ICASE) && 295strncmp(item->match, name - prefix, item->prefix)) 296return0; 297 298if(item->attr_match_nr && !match_attrs(name, namelen, item)) 299return0; 300 301/* If the match was just the prefix, we matched */ 302if(!*match) 303return MATCHED_RECURSIVELY; 304 305if(matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 306if(matchlen == namelen) 307return MATCHED_EXACTLY; 308 309if(match[matchlen-1] =='/'|| name[matchlen] =='/') 310return MATCHED_RECURSIVELY; 311}else if((flags & DO_MATCH_DIRECTORY) && 312 match[matchlen -1] =='/'&& 313 namelen == matchlen -1&& 314!ps_strncmp(item, match, name, namelen)) 315return MATCHED_EXACTLY; 316 317if(item->nowildcard_len < item->len && 318!git_fnmatch(item, match, name, 319 item->nowildcard_len - prefix)) 320return MATCHED_FNMATCH; 321 322/* Perform checks to see if "name" is a super set of the pathspec */ 323if(flags & DO_MATCH_SUBMODULE) { 324/* name is a literal prefix of the pathspec */ 325if((namelen < matchlen) && 326(match[namelen] =='/') && 327!ps_strncmp(item, match, name, namelen)) 328return MATCHED_RECURSIVELY; 329 330/* name" doesn't match up to the first wild character */ 331if(item->nowildcard_len < item->len && 332ps_strncmp(item, match, name, 333 item->nowildcard_len - prefix)) 334return0; 335 336/* 337 * Here is where we would perform a wildmatch to check if 338 * "name" can be matched as a directory (or a prefix) against 339 * the pathspec. Since wildmatch doesn't have this capability 340 * at the present we have to punt and say that it is a match, 341 * potentially returning a false positive 342 * The submodules themselves will be able to perform more 343 * accurate matching to determine if the pathspec matches. 344 */ 345return MATCHED_RECURSIVELY; 346} 347 348return0; 349} 350 351/* 352 * Given a name and a list of pathspecs, returns the nature of the 353 * closest (i.e. most specific) match of the name to any of the 354 * pathspecs. 355 * 356 * The caller typically calls this multiple times with the same 357 * pathspec and seen[] array but with different name/namelen 358 * (e.g. entries from the index) and is interested in seeing if and 359 * how each pathspec matches all the names it calls this function 360 * with. A mark is left in the seen[] array for each pathspec element 361 * indicating the closest type of match that element achieved, so if 362 * seen[n] remains zero after multiple invocations, that means the nth 363 * pathspec did not match any names, which could indicate that the 364 * user mistyped the nth pathspec. 365 */ 366static intdo_match_pathspec(const struct pathspec *ps, 367const char*name,int namelen, 368int prefix,char*seen, 369unsigned flags) 370{ 371int i, retval =0, exclude = flags & DO_MATCH_EXCLUDE; 372 373GUARD_PATHSPEC(ps, 374 PATHSPEC_FROMTOP | 375 PATHSPEC_MAXDEPTH | 376 PATHSPEC_LITERAL | 377 PATHSPEC_GLOB | 378 PATHSPEC_ICASE | 379 PATHSPEC_EXCLUDE | 380 PATHSPEC_ATTR); 381 382if(!ps->nr) { 383if(!ps->recursive || 384!(ps->magic & PATHSPEC_MAXDEPTH) || 385 ps->max_depth == -1) 386return MATCHED_RECURSIVELY; 387 388if(within_depth(name, namelen,0, ps->max_depth)) 389return MATCHED_EXACTLY; 390else 391return0; 392} 393 394 name += prefix; 395 namelen -= prefix; 396 397for(i = ps->nr -1; i >=0; i--) { 398int how; 399 400if((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 401( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 402continue; 403 404if(seen && seen[i] == MATCHED_EXACTLY) 405continue; 406/* 407 * Make exclude patterns optional and never report 408 * "pathspec ':(exclude)foo' matches no files" 409 */ 410if(seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 411 seen[i] = MATCHED_FNMATCH; 412 how =match_pathspec_item(ps->items+i, prefix, name, 413 namelen, flags); 414if(ps->recursive && 415(ps->magic & PATHSPEC_MAXDEPTH) && 416 ps->max_depth != -1&& 417 how && how != MATCHED_FNMATCH) { 418int len = ps->items[i].len; 419if(name[len] =='/') 420 len++; 421if(within_depth(name+len, namelen-len,0, ps->max_depth)) 422 how = MATCHED_EXACTLY; 423else 424 how =0; 425} 426if(how) { 427if(retval < how) 428 retval = how; 429if(seen && seen[i] < how) 430 seen[i] = how; 431} 432} 433return retval; 434} 435 436intmatch_pathspec(const struct pathspec *ps, 437const char*name,int namelen, 438int prefix,char*seen,int is_dir) 439{ 440int positive, negative; 441unsigned flags = is_dir ? DO_MATCH_DIRECTORY :0; 442 positive =do_match_pathspec(ps, name, namelen, 443 prefix, seen, flags); 444if(!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 445return positive; 446 negative =do_match_pathspec(ps, name, namelen, 447 prefix, seen, 448 flags | DO_MATCH_EXCLUDE); 449return negative ?0: positive; 450} 451 452/** 453 * Check if a submodule is a superset of the pathspec 454 */ 455intsubmodule_path_match(const struct pathspec *ps, 456const char*submodule_name, 457char*seen) 458{ 459int matched =do_match_pathspec(ps, submodule_name, 460strlen(submodule_name), 4610, seen, 462 DO_MATCH_DIRECTORY | 463 DO_MATCH_SUBMODULE); 464return matched; 465} 466 467intreport_path_error(const char*ps_matched, 468const struct pathspec *pathspec, 469const char*prefix) 470{ 471/* 472 * Make sure all pathspec matched; otherwise it is an error. 473 */ 474int num, errors =0; 475for(num =0; num < pathspec->nr; num++) { 476int other, found_dup; 477 478if(ps_matched[num]) 479continue; 480/* 481 * The caller might have fed identical pathspec 482 * twice. Do not barf on such a mistake. 483 * FIXME: parse_pathspec should have eliminated 484 * duplicate pathspec. 485 */ 486for(found_dup = other =0; 487!found_dup && other < pathspec->nr; 488 other++) { 489if(other == num || !ps_matched[other]) 490continue; 491if(!strcmp(pathspec->items[other].original, 492 pathspec->items[num].original)) 493/* 494 * Ok, we have a match already. 495 */ 496 found_dup =1; 497} 498if(found_dup) 499continue; 500 501error("pathspec '%s' did not match any file(s) known to git.", 502 pathspec->items[num].original); 503 errors++; 504} 505return errors; 506} 507 508/* 509 * Return the length of the "simple" part of a path match limiter. 510 */ 511intsimple_length(const char*match) 512{ 513int len = -1; 514 515for(;;) { 516unsigned char c = *match++; 517 len++; 518if(c =='\0'||is_glob_special(c)) 519return len; 520} 521} 522 523intno_wildcard(const char*string) 524{ 525return string[simple_length(string)] =='\0'; 526} 527 528voidparse_exclude_pattern(const char**pattern, 529int*patternlen, 530unsigned*flags, 531int*nowildcardlen) 532{ 533const char*p = *pattern; 534size_t i, len; 535 536*flags =0; 537if(*p =='!') { 538*flags |= EXC_FLAG_NEGATIVE; 539 p++; 540} 541 len =strlen(p); 542if(len && p[len -1] =='/') { 543 len--; 544*flags |= EXC_FLAG_MUSTBEDIR; 545} 546for(i =0; i < len; i++) { 547if(p[i] =='/') 548break; 549} 550if(i == len) 551*flags |= EXC_FLAG_NODIR; 552*nowildcardlen =simple_length(p); 553/* 554 * we should have excluded the trailing slash from 'p' too, 555 * but that's one more allocation. Instead just make sure 556 * nowildcardlen does not exceed real patternlen 557 */ 558if(*nowildcardlen > len) 559*nowildcardlen = len; 560if(*p =='*'&&no_wildcard(p +1)) 561*flags |= EXC_FLAG_ENDSWITH; 562*pattern = p; 563*patternlen = len; 564} 565 566voidadd_exclude(const char*string,const char*base, 567int baselen,struct exclude_list *el,int srcpos) 568{ 569struct exclude *x; 570int patternlen; 571unsigned flags; 572int nowildcardlen; 573 574parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 575if(flags & EXC_FLAG_MUSTBEDIR) { 576FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen); 577}else{ 578 x =xmalloc(sizeof(*x)); 579 x->pattern = string; 580} 581 x->patternlen = patternlen; 582 x->nowildcardlen = nowildcardlen; 583 x->base = base; 584 x->baselen = baselen; 585 x->flags = flags; 586 x->srcpos = srcpos; 587ALLOC_GROW(el->excludes, el->nr +1, el->alloc); 588 el->excludes[el->nr++] = x; 589 x->el = el; 590} 591 592static void*read_skip_worktree_file_from_index(const struct index_state *istate, 593const char*path,size_t*size, 594struct sha1_stat *sha1_stat) 595{ 596int pos, len; 597unsigned long sz; 598enum object_type type; 599void*data; 600 601 len =strlen(path); 602 pos =index_name_pos(istate, path, len); 603if(pos <0) 604return NULL; 605if(!ce_skip_worktree(istate->cache[pos])) 606return NULL; 607 data =read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz); 608if(!data || type != OBJ_BLOB) { 609free(data); 610return NULL; 611} 612*size =xsize_t(sz); 613if(sha1_stat) { 614memset(&sha1_stat->stat,0,sizeof(sha1_stat->stat)); 615hashcpy(sha1_stat->sha1, istate->cache[pos]->oid.hash); 616} 617return data; 618} 619 620/* 621 * Frees memory within el which was allocated for exclude patterns and 622 * the file buffer. Does not free el itself. 623 */ 624voidclear_exclude_list(struct exclude_list *el) 625{ 626int i; 627 628for(i =0; i < el->nr; i++) 629free(el->excludes[i]); 630free(el->excludes); 631free(el->filebuf); 632 633memset(el,0,sizeof(*el)); 634} 635 636static voidtrim_trailing_spaces(char*buf) 637{ 638char*p, *last_space = NULL; 639 640for(p = buf; *p; p++) 641switch(*p) { 642case' ': 643if(!last_space) 644 last_space = p; 645break; 646case'\\': 647 p++; 648if(!*p) 649return; 650/* fallthrough */ 651default: 652 last_space = NULL; 653} 654 655if(last_space) 656*last_space ='\0'; 657} 658 659/* 660 * Given a subdirectory name and "dir" of the current directory, 661 * search the subdir in "dir" and return it, or create a new one if it 662 * does not exist in "dir". 663 * 664 * If "name" has the trailing slash, it'll be excluded in the search. 665 */ 666static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 667struct untracked_cache_dir *dir, 668const char*name,int len) 669{ 670int first, last; 671struct untracked_cache_dir *d; 672if(!dir) 673return NULL; 674if(len && name[len -1] =='/') 675 len--; 676 first =0; 677 last = dir->dirs_nr; 678while(last > first) { 679int cmp, next = (last + first) >>1; 680 d = dir->dirs[next]; 681 cmp =strncmp(name, d->name, len); 682if(!cmp &&strlen(d->name) > len) 683 cmp = -1; 684if(!cmp) 685return d; 686if(cmp <0) { 687 last = next; 688continue; 689} 690 first = next+1; 691} 692 693 uc->dir_created++; 694FLEX_ALLOC_MEM(d, name, name, len); 695 696ALLOC_GROW(dir->dirs, dir->dirs_nr +1, dir->dirs_alloc); 697memmove(dir->dirs + first +1, dir->dirs + first, 698(dir->dirs_nr - first) *sizeof(*dir->dirs)); 699 dir->dirs_nr++; 700 dir->dirs[first] = d; 701return d; 702} 703 704static voiddo_invalidate_gitignore(struct untracked_cache_dir *dir) 705{ 706int i; 707 dir->valid =0; 708 dir->untracked_nr =0; 709for(i =0; i < dir->dirs_nr; i++) 710do_invalidate_gitignore(dir->dirs[i]); 711} 712 713static voidinvalidate_gitignore(struct untracked_cache *uc, 714struct untracked_cache_dir *dir) 715{ 716 uc->gitignore_invalidated++; 717do_invalidate_gitignore(dir); 718} 719 720static voidinvalidate_directory(struct untracked_cache *uc, 721struct untracked_cache_dir *dir) 722{ 723int i; 724 uc->dir_invalidated++; 725 dir->valid =0; 726 dir->untracked_nr =0; 727for(i =0; i < dir->dirs_nr; i++) 728 dir->dirs[i]->recurse =0; 729} 730 731/* 732 * Given a file with name "fname", read it (either from disk, or from 733 * an index if 'istate' is non-null), parse it and store the 734 * exclude rules in "el". 735 * 736 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 737 * stat data from disk (only valid if add_excludes returns zero). If 738 * ss_valid is non-zero, "ss" must contain good value as input. 739 */ 740static intadd_excludes(const char*fname,const char*base,int baselen, 741struct exclude_list *el, 742struct index_state *istate, 743struct sha1_stat *sha1_stat) 744{ 745struct stat st; 746int fd, i, lineno =1; 747size_t size =0; 748char*buf, *entry; 749 750 fd =open(fname, O_RDONLY); 751if(fd <0||fstat(fd, &st) <0) { 752if(errno != ENOENT) 753warn_on_inaccessible(fname); 754if(0<= fd) 755close(fd); 756if(!istate || 757(buf =read_skip_worktree_file_from_index(istate, fname, &size, sha1_stat)) == NULL) 758return-1; 759if(size ==0) { 760free(buf); 761return0; 762} 763if(buf[size-1] !='\n') { 764 buf =xrealloc(buf,st_add(size,1)); 765 buf[size++] ='\n'; 766} 767}else{ 768 size =xsize_t(st.st_size); 769if(size ==0) { 770if(sha1_stat) { 771fill_stat_data(&sha1_stat->stat, &st); 772hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); 773 sha1_stat->valid =1; 774} 775close(fd); 776return0; 777} 778 buf =xmallocz(size); 779if(read_in_full(fd, buf, size) != size) { 780free(buf); 781close(fd); 782return-1; 783} 784 buf[size++] ='\n'; 785close(fd); 786if(sha1_stat) { 787int pos; 788if(sha1_stat->valid && 789!match_stat_data_racy(istate, &sha1_stat->stat, &st)) 790;/* no content change, ss->sha1 still good */ 791else if(istate && 792(pos =index_name_pos(istate, fname,strlen(fname))) >=0&& 793!ce_stage(istate->cache[pos]) && 794ce_uptodate(istate->cache[pos]) && 795!would_convert_to_git(fname)) 796hashcpy(sha1_stat->sha1, 797 istate->cache[pos]->oid.hash); 798else 799hash_sha1_file(buf, size,"blob", sha1_stat->sha1); 800fill_stat_data(&sha1_stat->stat, &st); 801 sha1_stat->valid =1; 802} 803} 804 805 el->filebuf = buf; 806 807if(skip_utf8_bom(&buf, size)) 808 size -= buf - el->filebuf; 809 810 entry = buf; 811 812for(i =0; i < size; i++) { 813if(buf[i] =='\n') { 814if(entry != buf + i && entry[0] !='#') { 815 buf[i - (i && buf[i-1] =='\r')] =0; 816trim_trailing_spaces(entry); 817add_exclude(entry, base, baselen, el, lineno); 818} 819 lineno++; 820 entry = buf + i +1; 821} 822} 823return0; 824} 825 826intadd_excludes_from_file_to_list(const char*fname,const char*base, 827int baselen,struct exclude_list *el, 828struct index_state *istate) 829{ 830returnadd_excludes(fname, base, baselen, el, istate, NULL); 831} 832 833struct exclude_list *add_exclude_list(struct dir_struct *dir, 834int group_type,const char*src) 835{ 836struct exclude_list *el; 837struct exclude_list_group *group; 838 839 group = &dir->exclude_list_group[group_type]; 840ALLOC_GROW(group->el, group->nr +1, group->alloc); 841 el = &group->el[group->nr++]; 842memset(el,0,sizeof(*el)); 843 el->src = src; 844return el; 845} 846 847/* 848 * Used to set up core.excludesfile and .git/info/exclude lists. 849 */ 850static voidadd_excludes_from_file_1(struct dir_struct *dir,const char*fname, 851struct sha1_stat *sha1_stat) 852{ 853struct exclude_list *el; 854/* 855 * catch setup_standard_excludes() that's called before 856 * dir->untracked is assigned. That function behaves 857 * differently when dir->untracked is non-NULL. 858 */ 859if(!dir->untracked) 860 dir->unmanaged_exclude_files++; 861 el =add_exclude_list(dir, EXC_FILE, fname); 862if(add_excludes(fname,"",0, el, NULL, sha1_stat) <0) 863die("cannot use%sas an exclude file", fname); 864} 865 866voidadd_excludes_from_file(struct dir_struct *dir,const char*fname) 867{ 868 dir->unmanaged_exclude_files++;/* see validate_untracked_cache() */ 869add_excludes_from_file_1(dir, fname, NULL); 870} 871 872intmatch_basename(const char*basename,int basenamelen, 873const char*pattern,int prefix,int patternlen, 874unsigned flags) 875{ 876if(prefix == patternlen) { 877if(patternlen == basenamelen && 878!fspathncmp(pattern, basename, basenamelen)) 879return1; 880}else if(flags & EXC_FLAG_ENDSWITH) { 881/* "*literal" matching against "fooliteral" */ 882if(patternlen -1<= basenamelen && 883!fspathncmp(pattern +1, 884 basename + basenamelen - (patternlen -1), 885 patternlen -1)) 886return1; 887}else{ 888if(fnmatch_icase_mem(pattern, patternlen, 889 basename, basenamelen, 8900) ==0) 891return1; 892} 893return0; 894} 895 896intmatch_pathname(const char*pathname,int pathlen, 897const char*base,int baselen, 898const char*pattern,int prefix,int patternlen, 899unsigned flags) 900{ 901const char*name; 902int namelen; 903 904/* 905 * match with FNM_PATHNAME; the pattern has base implicitly 906 * in front of it. 907 */ 908if(*pattern =='/') { 909 pattern++; 910 patternlen--; 911 prefix--; 912} 913 914/* 915 * baselen does not count the trailing slash. base[] may or 916 * may not end with a trailing slash though. 917 */ 918if(pathlen < baselen +1|| 919(baselen && pathname[baselen] !='/') || 920fspathncmp(pathname, base, baselen)) 921return0; 922 923 namelen = baselen ? pathlen - baselen -1: pathlen; 924 name = pathname + pathlen - namelen; 925 926if(prefix) { 927/* 928 * if the non-wildcard part is longer than the 929 * remaining pathname, surely it cannot match. 930 */ 931if(prefix > namelen) 932return0; 933 934if(fspathncmp(pattern, name, prefix)) 935return0; 936 pattern += prefix; 937 patternlen -= prefix; 938 name += prefix; 939 namelen -= prefix; 940 941/* 942 * If the whole pattern did not have a wildcard, 943 * then our prefix match is all we need; we 944 * do not need to call fnmatch at all. 945 */ 946if(!patternlen && !namelen) 947return1; 948} 949 950returnfnmatch_icase_mem(pattern, patternlen, 951 name, namelen, 952 WM_PATHNAME) ==0; 953} 954 955/* 956 * Scan the given exclude list in reverse to see whether pathname 957 * should be ignored. The first match (i.e. the last on the list), if 958 * any, determines the fate. Returns the exclude_list element which 959 * matched, or NULL for undecided. 960 */ 961static struct exclude *last_exclude_matching_from_list(const char*pathname, 962int pathlen, 963const char*basename, 964int*dtype, 965struct exclude_list *el, 966struct index_state *istate) 967{ 968struct exclude *exc = NULL;/* undecided */ 969int i; 970 971if(!el->nr) 972return NULL;/* undefined */ 973 974for(i = el->nr -1;0<= i; i--) { 975struct exclude *x = el->excludes[i]; 976const char*exclude = x->pattern; 977int prefix = x->nowildcardlen; 978 979if(x->flags & EXC_FLAG_MUSTBEDIR) { 980if(*dtype == DT_UNKNOWN) 981*dtype =get_dtype(NULL, istate, pathname, pathlen); 982if(*dtype != DT_DIR) 983continue; 984} 985 986if(x->flags & EXC_FLAG_NODIR) { 987if(match_basename(basename, 988 pathlen - (basename - pathname), 989 exclude, prefix, x->patternlen, 990 x->flags)) { 991 exc = x; 992break; 993} 994continue; 995} 996 997assert(x->baselen ==0|| x->base[x->baselen -1] =='/'); 998if(match_pathname(pathname, pathlen, 999 x->base, x->baselen ? x->baselen -1:0,1000 exclude, prefix, x->patternlen, x->flags)) {1001 exc = x;1002break;1003}1004}1005return exc;1006}10071008/*1009 * Scan the list and let the last match determine the fate.1010 * Return 1 for exclude, 0 for include and -1 for undecided.1011 */1012intis_excluded_from_list(const char*pathname,1013int pathlen,const char*basename,int*dtype,1014struct exclude_list *el,struct index_state *istate)1015{1016struct exclude *exclude;1017 exclude =last_exclude_matching_from_list(pathname, pathlen, basename,1018 dtype, el, istate);1019if(exclude)1020return exclude->flags & EXC_FLAG_NEGATIVE ?0:1;1021return-1;/* undecided */1022}10231024static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,1025struct index_state *istate,1026const char*pathname,int pathlen,const char*basename,1027int*dtype_p)1028{1029int i, j;1030struct exclude_list_group *group;1031struct exclude *exclude;1032for(i = EXC_CMDL; i <= EXC_FILE; i++) {1033 group = &dir->exclude_list_group[i];1034for(j = group->nr -1; j >=0; j--) {1035 exclude =last_exclude_matching_from_list(1036 pathname, pathlen, basename, dtype_p,1037&group->el[j], istate);1038if(exclude)1039return exclude;1040}1041}1042return NULL;1043}10441045/*1046 * Loads the per-directory exclude list for the substring of base1047 * which has a char length of baselen.1048 */1049static voidprep_exclude(struct dir_struct *dir,const char*base,int baselen)1050{1051struct exclude_list_group *group;1052struct exclude_list *el;1053struct exclude_stack *stk = NULL;1054struct untracked_cache_dir *untracked;1055int current;10561057 group = &dir->exclude_list_group[EXC_DIRS];10581059/*1060 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1061 * which originate from directories not in the prefix of the1062 * path being checked.1063 */1064while((stk = dir->exclude_stack) != NULL) {1065if(stk->baselen <= baselen &&1066!strncmp(dir->basebuf.buf, base, stk->baselen))1067break;1068 el = &group->el[dir->exclude_stack->exclude_ix];1069 dir->exclude_stack = stk->prev;1070 dir->exclude = NULL;1071free((char*)el->src);/* see strbuf_detach() below */1072clear_exclude_list(el);1073free(stk);1074 group->nr--;1075}10761077/* Skip traversing into sub directories if the parent is excluded */1078if(dir->exclude)1079return;10801081/*1082 * Lazy initialization. All call sites currently just1083 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1084 * them seems lots of work for little benefit.1085 */1086if(!dir->basebuf.buf)1087strbuf_init(&dir->basebuf, PATH_MAX);10881089/* Read from the parent directories and push them down. */1090 current = stk ? stk->baselen : -1;1091strbuf_setlen(&dir->basebuf, current <0?0: current);1092if(dir->untracked)1093 untracked = stk ? stk->ucd : dir->untracked->root;1094else1095 untracked = NULL;10961097while(current < baselen) {1098const char*cp;1099struct sha1_stat sha1_stat;11001101 stk =xcalloc(1,sizeof(*stk));1102if(current <0) {1103 cp = base;1104 current =0;1105}else{1106 cp =strchr(base + current +1,'/');1107if(!cp)1108die("oops in prep_exclude");1109 cp++;1110 untracked =1111lookup_untracked(dir->untracked, untracked,1112 base + current,1113 cp - base - current);1114}1115 stk->prev = dir->exclude_stack;1116 stk->baselen = cp - base;1117 stk->exclude_ix = group->nr;1118 stk->ucd = untracked;1119 el =add_exclude_list(dir, EXC_DIRS, NULL);1120strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1121assert(stk->baselen == dir->basebuf.len);11221123/* Abort if the directory is excluded */1124if(stk->baselen) {1125int dt = DT_DIR;1126 dir->basebuf.buf[stk->baselen -1] =0;1127 dir->exclude =last_exclude_matching_from_lists(dir,1128&the_index,1129 dir->basebuf.buf, stk->baselen -1,1130 dir->basebuf.buf + current, &dt);1131 dir->basebuf.buf[stk->baselen -1] ='/';1132if(dir->exclude &&1133 dir->exclude->flags & EXC_FLAG_NEGATIVE)1134 dir->exclude = NULL;1135if(dir->exclude) {1136 dir->exclude_stack = stk;1137return;1138}1139}11401141/* Try to read per-directory file */1142hashclr(sha1_stat.sha1);1143 sha1_stat.valid =0;1144if(dir->exclude_per_dir &&1145/*1146 * If we know that no files have been added in1147 * this directory (i.e. valid_cached_dir() has1148 * been executed and set untracked->valid) ..1149 */1150(!untracked || !untracked->valid ||1151/*1152 * .. and .gitignore does not exist before1153 * (i.e. null exclude_sha1). Then we can skip1154 * loading .gitignore, which would result in1155 * ENOENT anyway.1156 */1157!is_null_sha1(untracked->exclude_sha1))) {1158/*1159 * dir->basebuf gets reused by the traversal, but we1160 * need fname to remain unchanged to ensure the src1161 * member of each struct exclude correctly1162 * back-references its source file. Other invocations1163 * of add_exclude_list provide stable strings, so we1164 * strbuf_detach() and free() here in the caller.1165 */1166struct strbuf sb = STRBUF_INIT;1167strbuf_addbuf(&sb, &dir->basebuf);1168strbuf_addstr(&sb, dir->exclude_per_dir);1169 el->src =strbuf_detach(&sb, NULL);1170add_excludes(el->src, el->src, stk->baselen, el, &the_index,1171 untracked ? &sha1_stat : NULL);1172}1173/*1174 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1175 * will first be called in valid_cached_dir() then maybe many1176 * times more in last_exclude_matching(). When the cache is1177 * used, last_exclude_matching() will not be called and1178 * reading .gitignore content will be a waste.1179 *1180 * So when it's called by valid_cached_dir() and we can get1181 * .gitignore SHA-1 from the index (i.e. .gitignore is not1182 * modified on work tree), we could delay reading the1183 * .gitignore content until we absolutely need it in1184 * last_exclude_matching(). Be careful about ignore rule1185 * order, though, if you do that.1186 */1187if(untracked &&1188hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {1189invalidate_gitignore(dir->untracked, untracked);1190hashcpy(untracked->exclude_sha1, sha1_stat.sha1);1191}1192 dir->exclude_stack = stk;1193 current = stk->baselen;1194}1195strbuf_setlen(&dir->basebuf, baselen);1196}11971198/*1199 * Loads the exclude lists for the directory containing pathname, then1200 * scans all exclude lists to determine whether pathname is excluded.1201 * Returns the exclude_list element which matched, or NULL for1202 * undecided.1203 */1204struct exclude *last_exclude_matching(struct dir_struct *dir,1205const char*pathname,1206int*dtype_p)1207{1208int pathlen =strlen(pathname);1209const char*basename =strrchr(pathname,'/');1210 basename = (basename) ? basename+1: pathname;12111212prep_exclude(dir, pathname, basename-pathname);12131214if(dir->exclude)1215return dir->exclude;12161217returnlast_exclude_matching_from_lists(dir, &the_index, pathname, pathlen,1218 basename, dtype_p);1219}12201221/*1222 * Loads the exclude lists for the directory containing pathname, then1223 * scans all exclude lists to determine whether pathname is excluded.1224 * Returns 1 if true, otherwise 0.1225 */1226intis_excluded(struct dir_struct *dir,const char*pathname,int*dtype_p)1227{1228struct exclude *exclude =1229last_exclude_matching(dir, pathname, dtype_p);1230if(exclude)1231return exclude->flags & EXC_FLAG_NEGATIVE ?0:1;1232return0;1233}12341235static struct dir_entry *dir_entry_new(const char*pathname,int len)1236{1237struct dir_entry *ent;12381239FLEX_ALLOC_MEM(ent, name, pathname, len);1240 ent->len = len;1241return ent;1242}12431244static struct dir_entry *dir_add_name(struct dir_struct *dir,1245struct index_state *istate,1246const char*pathname,int len)1247{1248if(index_file_exists(istate, pathname, len, ignore_case))1249return NULL;12501251ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1252return dir->entries[dir->nr++] =dir_entry_new(pathname, len);1253}12541255struct dir_entry *dir_add_ignored(struct dir_struct *dir,1256struct index_state *istate,1257const char*pathname,int len)1258{1259if(!index_name_is_other(istate, pathname, len))1260return NULL;12611262ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1263return dir->ignored[dir->ignored_nr++] =dir_entry_new(pathname, len);1264}12651266enum exist_status {1267 index_nonexistent =0,1268 index_directory,1269 index_gitdir1270};12711272/*1273 * Do not use the alphabetically sorted index to look up1274 * the directory name; instead, use the case insensitive1275 * directory hash.1276 */1277static enum exist_status directory_exists_in_index_icase(struct index_state *istate,1278const char*dirname,int len)1279{1280struct cache_entry *ce;12811282if(index_dir_exists(istate, dirname, len))1283return index_directory;12841285 ce =index_file_exists(istate, dirname, len, ignore_case);1286if(ce &&S_ISGITLINK(ce->ce_mode))1287return index_gitdir;12881289return index_nonexistent;1290}12911292/*1293 * The index sorts alphabetically by entry name, which1294 * means that a gitlink sorts as '\0' at the end, while1295 * a directory (which is defined not as an entry, but as1296 * the files it contains) will sort with the '/' at the1297 * end.1298 */1299static enum exist_status directory_exists_in_index(struct index_state *istate,1300const char*dirname,int len)1301{1302int pos;13031304if(ignore_case)1305returndirectory_exists_in_index_icase(istate, dirname, len);13061307 pos =index_name_pos(istate, dirname, len);1308if(pos <0)1309 pos = -pos-1;1310while(pos < istate->cache_nr) {1311const struct cache_entry *ce = istate->cache[pos++];1312unsigned char endchar;13131314if(strncmp(ce->name, dirname, len))1315break;1316 endchar = ce->name[len];1317if(endchar >'/')1318break;1319if(endchar =='/')1320return index_directory;1321if(!endchar &&S_ISGITLINK(ce->ce_mode))1322return index_gitdir;1323}1324return index_nonexistent;1325}13261327/*1328 * When we find a directory when traversing the filesystem, we1329 * have three distinct cases:1330 *1331 * - ignore it1332 * - see it as a directory1333 * - recurse into it1334 *1335 * and which one we choose depends on a combination of existing1336 * git index contents and the flags passed into the directory1337 * traversal routine.1338 *1339 * Case 1: If we *already* have entries in the index under that1340 * directory name, we always recurse into the directory to see1341 * all the files.1342 *1343 * Case 2: If we *already* have that directory name as a gitlink,1344 * we always continue to see it as a gitlink, regardless of whether1345 * there is an actual git directory there or not (it might not1346 * be checked out as a subproject!)1347 *1348 * Case 3: if we didn't have it in the index previously, we1349 * have a few sub-cases:1350 *1351 * (a) if "show_other_directories" is true, we show it as1352 * just a directory, unless "hide_empty_directories" is1353 * also true, in which case we need to check if it contains any1354 * untracked and / or ignored files.1355 * (b) if it looks like a git directory, and we don't have1356 * 'no_gitlinks' set we treat it as a gitlink, and show it1357 * as a directory.1358 * (c) otherwise, we recurse into it.1359 */1360static enum path_treatment treat_directory(struct dir_struct *dir,1361struct untracked_cache_dir *untracked,1362const char*dirname,int len,int baselen,int exclude,1363const struct pathspec *pathspec)1364{1365/* The "len-1" is to strip the final '/' */1366switch(directory_exists_in_index(&the_index, dirname, len-1)) {1367case index_directory:1368return path_recurse;13691370case index_gitdir:1371return path_none;13721373case index_nonexistent:1374if(dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1375break;1376if(!(dir->flags & DIR_NO_GITLINKS)) {1377unsigned char sha1[20];1378if(resolve_gitlink_ref(dirname,"HEAD", sha1) ==0)1379return path_untracked;1380}1381return path_recurse;1382}13831384/* This is the "show_other_directories" case */13851386if(!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1387return exclude ? path_excluded : path_untracked;13881389 untracked =lookup_untracked(dir->untracked, untracked,1390 dirname + baselen, len - baselen);1391returnread_directory_recursive(dir, dirname, len,1392 untracked,1, pathspec);1393}13941395/*1396 * This is an inexact early pruning of any recursive directory1397 * reading - if the path cannot possibly be in the pathspec,1398 * return true, and we'll skip it early.1399 */1400static intsimplify_away(const char*path,int pathlen,1401const struct pathspec *pathspec)1402{1403int i;14041405if(!pathspec || !pathspec->nr)1406return0;14071408GUARD_PATHSPEC(pathspec,1409 PATHSPEC_FROMTOP |1410 PATHSPEC_MAXDEPTH |1411 PATHSPEC_LITERAL |1412 PATHSPEC_GLOB |1413 PATHSPEC_ICASE |1414 PATHSPEC_EXCLUDE |1415 PATHSPEC_ATTR);14161417for(i =0; i < pathspec->nr; i++) {1418const struct pathspec_item *item = &pathspec->items[i];1419int len = item->nowildcard_len;14201421if(len > pathlen)1422 len = pathlen;1423if(!ps_strncmp(item, item->match, path, len))1424return0;1425}14261427return1;1428}14291430/*1431 * This function tells us whether an excluded path matches a1432 * list of "interesting" pathspecs. That is, whether a path matched1433 * by any of the pathspecs could possibly be ignored by excluding1434 * the specified path. This can happen if:1435 *1436 * 1. the path is mentioned explicitly in the pathspec1437 *1438 * 2. the path is a directory prefix of some element in the1439 * pathspec1440 */1441static intexclude_matches_pathspec(const char*path,int pathlen,1442const struct pathspec *pathspec)1443{1444int i;14451446if(!pathspec || !pathspec->nr)1447return0;14481449GUARD_PATHSPEC(pathspec,1450 PATHSPEC_FROMTOP |1451 PATHSPEC_MAXDEPTH |1452 PATHSPEC_LITERAL |1453 PATHSPEC_GLOB |1454 PATHSPEC_ICASE |1455 PATHSPEC_EXCLUDE);14561457for(i =0; i < pathspec->nr; i++) {1458const struct pathspec_item *item = &pathspec->items[i];1459int len = item->nowildcard_len;14601461if(len == pathlen &&1462!ps_strncmp(item, item->match, path, pathlen))1463return1;1464if(len > pathlen &&1465 item->match[pathlen] =='/'&&1466!ps_strncmp(item, item->match, path, pathlen))1467return1;1468}1469return0;1470}14711472static intget_index_dtype(struct index_state *istate,1473const char*path,int len)1474{1475int pos;1476const struct cache_entry *ce;14771478 ce =index_file_exists(istate, path, len,0);1479if(ce) {1480if(!ce_uptodate(ce))1481return DT_UNKNOWN;1482if(S_ISGITLINK(ce->ce_mode))1483return DT_DIR;1484/*1485 * Nobody actually cares about the1486 * difference between DT_LNK and DT_REG1487 */1488return DT_REG;1489}14901491/* Try to look it up as a directory */1492 pos =index_name_pos(istate, path, len);1493if(pos >=0)1494return DT_UNKNOWN;1495 pos = -pos-1;1496while(pos < istate->cache_nr) {1497 ce = istate->cache[pos++];1498if(strncmp(ce->name, path, len))1499break;1500if(ce->name[len] >'/')1501break;1502if(ce->name[len] <'/')1503continue;1504if(!ce_uptodate(ce))1505break;/* continue? */1506return DT_DIR;1507}1508return DT_UNKNOWN;1509}15101511static intget_dtype(struct dirent *de,struct index_state *istate,1512const char*path,int len)1513{1514int dtype = de ?DTYPE(de) : DT_UNKNOWN;1515struct stat st;15161517if(dtype != DT_UNKNOWN)1518return dtype;1519 dtype =get_index_dtype(istate, path, len);1520if(dtype != DT_UNKNOWN)1521return dtype;1522if(lstat(path, &st))1523return dtype;1524if(S_ISREG(st.st_mode))1525return DT_REG;1526if(S_ISDIR(st.st_mode))1527return DT_DIR;1528if(S_ISLNK(st.st_mode))1529return DT_LNK;1530return dtype;1531}15321533static enum path_treatment treat_one_path(struct dir_struct *dir,1534struct untracked_cache_dir *untracked,1535struct strbuf *path,1536int baselen,1537const struct pathspec *pathspec,1538int dtype,struct dirent *de)1539{1540int exclude;1541int has_path_in_index = !!index_file_exists(&the_index, path->buf, path->len, ignore_case);15421543if(dtype == DT_UNKNOWN)1544 dtype =get_dtype(de, &the_index, path->buf, path->len);15451546/* Always exclude indexed files */1547if(dtype != DT_DIR && has_path_in_index)1548return path_none;15491550/*1551 * When we are looking at a directory P in the working tree,1552 * there are three cases:1553 *1554 * (1) P exists in the index. Everything inside the directory P in1555 * the working tree needs to go when P is checked out from the1556 * index.1557 *1558 * (2) P does not exist in the index, but there is P/Q in the index.1559 * We know P will stay a directory when we check out the contents1560 * of the index, but we do not know yet if there is a directory1561 * P/Q in the working tree to be killed, so we need to recurse.1562 *1563 * (3) P does not exist in the index, and there is no P/Q in the index1564 * to require P to be a directory, either. Only in this case, we1565 * know that everything inside P will not be killed without1566 * recursing.1567 */1568if((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1569(dtype == DT_DIR) &&1570!has_path_in_index &&1571(directory_exists_in_index(&the_index, path->buf, path->len) == index_nonexistent))1572return path_none;15731574 exclude =is_excluded(dir, path->buf, &dtype);15751576/*1577 * Excluded? If we don't explicitly want to show1578 * ignored files, ignore it1579 */1580if(exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1581return path_excluded;15821583switch(dtype) {1584default:1585return path_none;1586case DT_DIR:1587strbuf_addch(path,'/');1588returntreat_directory(dir, untracked, path->buf, path->len,1589 baselen, exclude, pathspec);1590case DT_REG:1591case DT_LNK:1592return exclude ? path_excluded : path_untracked;1593}1594}15951596static enum path_treatment treat_path_fast(struct dir_struct *dir,1597struct untracked_cache_dir *untracked,1598struct cached_dir *cdir,1599struct strbuf *path,1600int baselen,1601const struct pathspec *pathspec)1602{1603strbuf_setlen(path, baselen);1604if(!cdir->ucd) {1605strbuf_addstr(path, cdir->file);1606return path_untracked;1607}1608strbuf_addstr(path, cdir->ucd->name);1609/* treat_one_path() does this before it calls treat_directory() */1610strbuf_complete(path,'/');1611if(cdir->ucd->check_only)1612/*1613 * check_only is set as a result of treat_directory() getting1614 * to its bottom. Verify again the same set of directories1615 * with check_only set.1616 */1617returnread_directory_recursive(dir, path->buf, path->len,1618 cdir->ucd,1, pathspec);1619/*1620 * We get path_recurse in the first run when1621 * directory_exists_in_index() returns index_nonexistent. We1622 * are sure that new changes in the index does not impact the1623 * outcome. Return now.1624 */1625return path_recurse;1626}16271628static enum path_treatment treat_path(struct dir_struct *dir,1629struct untracked_cache_dir *untracked,1630struct cached_dir *cdir,1631struct strbuf *path,1632int baselen,1633const struct pathspec *pathspec)1634{1635int dtype;1636struct dirent *de = cdir->de;16371638if(!de)1639returntreat_path_fast(dir, untracked, cdir, path,1640 baselen, pathspec);1641if(is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name,".git"))1642return path_none;1643strbuf_setlen(path, baselen);1644strbuf_addstr(path, de->d_name);1645if(simplify_away(path->buf, path->len, pathspec))1646return path_none;16471648 dtype =DTYPE(de);1649returntreat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);1650}16511652static voidadd_untracked(struct untracked_cache_dir *dir,const char*name)1653{1654if(!dir)1655return;1656ALLOC_GROW(dir->untracked, dir->untracked_nr +1,1657 dir->untracked_alloc);1658 dir->untracked[dir->untracked_nr++] =xstrdup(name);1659}16601661static intvalid_cached_dir(struct dir_struct *dir,1662struct untracked_cache_dir *untracked,1663struct strbuf *path,1664int check_only)1665{1666struct stat st;16671668if(!untracked)1669return0;16701671if(stat(path->len ? path->buf :".", &st)) {1672invalidate_directory(dir->untracked, untracked);1673memset(&untracked->stat_data,0,sizeof(untracked->stat_data));1674return0;1675}1676if(!untracked->valid ||1677match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {1678if(untracked->valid)1679invalidate_directory(dir->untracked, untracked);1680fill_stat_data(&untracked->stat_data, &st);1681return0;1682}16831684if(untracked->check_only != !!check_only) {1685invalidate_directory(dir->untracked, untracked);1686return0;1687}16881689/*1690 * prep_exclude will be called eventually on this directory,1691 * but it's called much later in last_exclude_matching(). We1692 * need it now to determine the validity of the cache for this1693 * path. The next calls will be nearly no-op, the way1694 * prep_exclude() is designed.1695 */1696if(path->len && path->buf[path->len -1] !='/') {1697strbuf_addch(path,'/');1698prep_exclude(dir, path->buf, path->len);1699strbuf_setlen(path, path->len -1);1700}else1701prep_exclude(dir, path->buf, path->len);17021703/* hopefully prep_exclude() haven't invalidated this entry... */1704return untracked->valid;1705}17061707static intopen_cached_dir(struct cached_dir *cdir,1708struct dir_struct *dir,1709struct untracked_cache_dir *untracked,1710struct strbuf *path,1711int check_only)1712{1713memset(cdir,0,sizeof(*cdir));1714 cdir->untracked = untracked;1715if(valid_cached_dir(dir, untracked, path, check_only))1716return0;1717 cdir->fdir =opendir(path->len ? path->buf :".");1718if(dir->untracked)1719 dir->untracked->dir_opened++;1720if(!cdir->fdir)1721return-1;1722return0;1723}17241725static intread_cached_dir(struct cached_dir *cdir)1726{1727if(cdir->fdir) {1728 cdir->de =readdir(cdir->fdir);1729if(!cdir->de)1730return-1;1731return0;1732}1733while(cdir->nr_dirs < cdir->untracked->dirs_nr) {1734struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1735if(!d->recurse) {1736 cdir->nr_dirs++;1737continue;1738}1739 cdir->ucd = d;1740 cdir->nr_dirs++;1741return0;1742}1743 cdir->ucd = NULL;1744if(cdir->nr_files < cdir->untracked->untracked_nr) {1745struct untracked_cache_dir *d = cdir->untracked;1746 cdir->file = d->untracked[cdir->nr_files++];1747return0;1748}1749return-1;1750}17511752static voidclose_cached_dir(struct cached_dir *cdir)1753{1754if(cdir->fdir)1755closedir(cdir->fdir);1756/*1757 * We have gone through this directory and found no untracked1758 * entries. Mark it valid.1759 */1760if(cdir->untracked) {1761 cdir->untracked->valid =1;1762 cdir->untracked->recurse =1;1763}1764}17651766/*1767 * Read a directory tree. We currently ignore anything but1768 * directories, regular files and symlinks. That's because git1769 * doesn't handle them at all yet. Maybe that will change some1770 * day.1771 *1772 * Also, we ignore the name ".git" (even if it is not a directory).1773 * That likely will not change.1774 *1775 * Returns the most significant path_treatment value encountered in the scan.1776 */1777static enum path_treatment read_directory_recursive(struct dir_struct *dir,1778const char*base,int baselen,1779struct untracked_cache_dir *untracked,int check_only,1780const struct pathspec *pathspec)1781{1782struct cached_dir cdir;1783enum path_treatment state, subdir_state, dir_state = path_none;1784struct strbuf path = STRBUF_INIT;17851786strbuf_add(&path, base, baselen);17871788if(open_cached_dir(&cdir, dir, untracked, &path, check_only))1789goto out;17901791if(untracked)1792 untracked->check_only = !!check_only;17931794while(!read_cached_dir(&cdir)) {1795/* check how the file or directory should be treated */1796 state =treat_path(dir, untracked, &cdir, &path,1797 baselen, pathspec);17981799if(state > dir_state)1800 dir_state = state;18011802/* recurse into subdir if instructed by treat_path */1803if(state == path_recurse) {1804struct untracked_cache_dir *ud;1805 ud =lookup_untracked(dir->untracked, untracked,1806 path.buf + baselen,1807 path.len - baselen);1808 subdir_state =1809read_directory_recursive(dir, path.buf,1810 path.len, ud,1811 check_only, pathspec);1812if(subdir_state > dir_state)1813 dir_state = subdir_state;1814}18151816if(check_only) {1817/* abort early if maximum state has been reached */1818if(dir_state == path_untracked) {1819if(cdir.fdir)1820add_untracked(untracked, path.buf + baselen);1821break;1822}1823/* skip the dir_add_* part */1824continue;1825}18261827/* add the path to the appropriate result list */1828switch(state) {1829case path_excluded:1830if(dir->flags & DIR_SHOW_IGNORED)1831dir_add_name(dir, &the_index, path.buf, path.len);1832else if((dir->flags & DIR_SHOW_IGNORED_TOO) ||1833((dir->flags & DIR_COLLECT_IGNORED) &&1834exclude_matches_pathspec(path.buf, path.len,1835 pathspec)))1836dir_add_ignored(dir, &the_index, path.buf, path.len);1837break;18381839case path_untracked:1840if(dir->flags & DIR_SHOW_IGNORED)1841break;1842dir_add_name(dir, &the_index, path.buf, path.len);1843if(cdir.fdir)1844add_untracked(untracked, path.buf + baselen);1845break;18461847default:1848break;1849}1850}1851close_cached_dir(&cdir);1852 out:1853strbuf_release(&path);18541855return dir_state;1856}18571858static intcmp_name(const void*p1,const void*p2)1859{1860const struct dir_entry *e1 = *(const struct dir_entry **)p1;1861const struct dir_entry *e2 = *(const struct dir_entry **)p2;18621863returnname_compare(e1->name, e1->len, e2->name, e2->len);1864}18651866static inttreat_leading_path(struct dir_struct *dir,1867const char*path,int len,1868const struct pathspec *pathspec)1869{1870struct strbuf sb = STRBUF_INIT;1871int baselen, rc =0;1872const char*cp;1873int old_flags = dir->flags;18741875while(len && path[len -1] =='/')1876 len--;1877if(!len)1878return1;1879 baselen =0;1880 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;1881while(1) {1882 cp = path + baselen + !!baselen;1883 cp =memchr(cp,'/', path + len - cp);1884if(!cp)1885 baselen = len;1886else1887 baselen = cp - path;1888strbuf_setlen(&sb,0);1889strbuf_add(&sb, path, baselen);1890if(!is_directory(sb.buf))1891break;1892if(simplify_away(sb.buf, sb.len, pathspec))1893break;1894if(treat_one_path(dir, NULL, &sb, baselen, pathspec,1895 DT_DIR, NULL) == path_none)1896break;/* do not recurse into it */1897if(len <= baselen) {1898 rc =1;1899break;/* finished checking */1900}1901}1902strbuf_release(&sb);1903 dir->flags = old_flags;1904return rc;1905}19061907static const char*get_ident_string(void)1908{1909static struct strbuf sb = STRBUF_INIT;1910struct utsname uts;19111912if(sb.len)1913return sb.buf;1914if(uname(&uts) <0)1915die_errno(_("failed to get kernel name and information"));1916strbuf_addf(&sb,"Location%s, system%s",get_git_work_tree(),1917 uts.sysname);1918return sb.buf;1919}19201921static intident_in_untracked(const struct untracked_cache *uc)1922{1923/*1924 * Previous git versions may have saved many NUL separated1925 * strings in the "ident" field, but it is insane to manage1926 * many locations, so just take care of the first one.1927 */19281929return!strcmp(uc->ident.buf,get_ident_string());1930}19311932static voidset_untracked_ident(struct untracked_cache *uc)1933{1934strbuf_reset(&uc->ident);1935strbuf_addstr(&uc->ident,get_ident_string());19361937/*1938 * This strbuf used to contain a list of NUL separated1939 * strings, so save NUL too for backward compatibility.1940 */1941strbuf_addch(&uc->ident,0);1942}19431944static voidnew_untracked_cache(struct index_state *istate)1945{1946struct untracked_cache *uc =xcalloc(1,sizeof(*uc));1947strbuf_init(&uc->ident,100);1948 uc->exclude_per_dir =".gitignore";1949/* should be the same flags used by git-status */1950 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;1951set_untracked_ident(uc);1952 istate->untracked = uc;1953 istate->cache_changed |= UNTRACKED_CHANGED;1954}19551956voidadd_untracked_cache(struct index_state *istate)1957{1958if(!istate->untracked) {1959new_untracked_cache(istate);1960}else{1961if(!ident_in_untracked(istate->untracked)) {1962free_untracked_cache(istate->untracked);1963new_untracked_cache(istate);1964}1965}1966}19671968voidremove_untracked_cache(struct index_state *istate)1969{1970if(istate->untracked) {1971free_untracked_cache(istate->untracked);1972 istate->untracked = NULL;1973 istate->cache_changed |= UNTRACKED_CHANGED;1974}1975}19761977static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,1978int base_len,1979const struct pathspec *pathspec)1980{1981struct untracked_cache_dir *root;19821983if(!dir->untracked ||getenv("GIT_DISABLE_UNTRACKED_CACHE"))1984return NULL;19851986/*1987 * We only support $GIT_DIR/info/exclude and core.excludesfile1988 * as the global ignore rule files. Any other additions1989 * (e.g. from command line) invalidate the cache. This1990 * condition also catches running setup_standard_excludes()1991 * before setting dir->untracked!1992 */1993if(dir->unmanaged_exclude_files)1994return NULL;19951996/*1997 * Optimize for the main use case only: whole-tree git1998 * status. More work involved in treat_leading_path() if we1999 * use cache on just a subset of the worktree. pathspec2000 * support could make the matter even worse.2001 */2002if(base_len || (pathspec && pathspec->nr))2003return NULL;20042005/* Different set of flags may produce different results */2006if(dir->flags != dir->untracked->dir_flags ||2007/*2008 * See treat_directory(), case index_nonexistent. Without2009 * this flag, we may need to also cache .git file content2010 * for the resolve_gitlink_ref() call, which we don't.2011 */2012!(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||2013/* We don't support collecting ignore files */2014(dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |2015 DIR_COLLECT_IGNORED)))2016return NULL;20172018/*2019 * If we use .gitignore in the cache and now you change it to2020 * .gitexclude, everything will go wrong.2021 */2022if(dir->exclude_per_dir != dir->untracked->exclude_per_dir &&2023strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))2024return NULL;20252026/*2027 * EXC_CMDL is not considered in the cache. If people set it,2028 * skip the cache.2029 */2030if(dir->exclude_list_group[EXC_CMDL].nr)2031return NULL;20322033if(!ident_in_untracked(dir->untracked)) {2034warning(_("Untracked cache is disabled on this system or location."));2035return NULL;2036}20372038if(!dir->untracked->root) {2039const int len =sizeof(*dir->untracked->root);2040 dir->untracked->root =xmalloc(len);2041memset(dir->untracked->root,0, len);2042}20432044/* Validate $GIT_DIR/info/exclude and core.excludesfile */2045 root = dir->untracked->root;2046if(hashcmp(dir->ss_info_exclude.sha1,2047 dir->untracked->ss_info_exclude.sha1)) {2048invalidate_gitignore(dir->untracked, root);2049 dir->untracked->ss_info_exclude = dir->ss_info_exclude;2050}2051if(hashcmp(dir->ss_excludes_file.sha1,2052 dir->untracked->ss_excludes_file.sha1)) {2053invalidate_gitignore(dir->untracked, root);2054 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2055}20562057/* Make sure this directory is not dropped out at saving phase */2058 root->recurse =1;2059return root;2060}20612062intread_directory(struct dir_struct *dir,const char*path,2063int len,const struct pathspec *pathspec)2064{2065struct untracked_cache_dir *untracked;20662067if(has_symlink_leading_path(path, len))2068return dir->nr;20692070 untracked =validate_untracked_cache(dir, len, pathspec);2071if(!untracked)2072/*2073 * make sure untracked cache code path is disabled,2074 * e.g. prep_exclude()2075 */2076 dir->untracked = NULL;2077if(!len ||treat_leading_path(dir, path, len, pathspec))2078read_directory_recursive(dir, path, len, untracked,0, pathspec);2079QSORT(dir->entries, dir->nr, cmp_name);2080QSORT(dir->ignored, dir->ignored_nr, cmp_name);2081if(dir->untracked) {2082static struct trace_key trace_untracked_stats =TRACE_KEY_INIT(UNTRACKED_STATS);2083trace_printf_key(&trace_untracked_stats,2084"node creation:%u\n"2085"gitignore invalidation:%u\n"2086"directory invalidation:%u\n"2087"opendir:%u\n",2088 dir->untracked->dir_created,2089 dir->untracked->gitignore_invalidated,2090 dir->untracked->dir_invalidated,2091 dir->untracked->dir_opened);2092if(dir->untracked == the_index.untracked &&2093(dir->untracked->dir_opened ||2094 dir->untracked->gitignore_invalidated ||2095 dir->untracked->dir_invalidated))2096 the_index.cache_changed |= UNTRACKED_CHANGED;2097if(dir->untracked != the_index.untracked) {2098free(dir->untracked);2099 dir->untracked = NULL;2100}2101}2102return dir->nr;2103}21042105intfile_exists(const char*f)2106{2107struct stat sb;2108returnlstat(f, &sb) ==0;2109}21102111static intcmp_icase(char a,char b)2112{2113if(a == b)2114return0;2115if(ignore_case)2116returntoupper(a) -toupper(b);2117return a - b;2118}21192120/*2121 * Given two normalized paths (a trailing slash is ok), if subdir is2122 * outside dir, return -1. Otherwise return the offset in subdir that2123 * can be used as relative path to dir.2124 */2125intdir_inside_of(const char*subdir,const char*dir)2126{2127int offset =0;21282129assert(dir && subdir && *dir && *subdir);21302131while(*dir && *subdir && !cmp_icase(*dir, *subdir)) {2132 dir++;2133 subdir++;2134 offset++;2135}21362137/* hel[p]/me vs hel[l]/yeah */2138if(*dir && *subdir)2139return-1;21402141if(!*subdir)2142return!*dir ? offset : -1;/* same dir */21432144/* foo/[b]ar vs foo/[] */2145if(is_dir_sep(dir[-1]))2146returnis_dir_sep(subdir[-1]) ? offset : -1;21472148/* foo[/]bar vs foo[] */2149returnis_dir_sep(*subdir) ? offset +1: -1;2150}21512152intis_inside_dir(const char*dir)2153{2154char*cwd;2155int rc;21562157if(!dir)2158return0;21592160 cwd =xgetcwd();2161 rc = (dir_inside_of(cwd, dir) >=0);2162free(cwd);2163return rc;2164}21652166intis_empty_dir(const char*path)2167{2168DIR*dir =opendir(path);2169struct dirent *e;2170int ret =1;21712172if(!dir)2173return0;21742175while((e =readdir(dir)) != NULL)2176if(!is_dot_or_dotdot(e->d_name)) {2177 ret =0;2178break;2179}21802181closedir(dir);2182return ret;2183}21842185static intremove_dir_recurse(struct strbuf *path,int flag,int*kept_up)2186{2187DIR*dir;2188struct dirent *e;2189int ret =0, original_len = path->len, len, kept_down =0;2190int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2191int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2192unsigned char submodule_head[20];21932194if((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2195!resolve_gitlink_ref(path->buf,"HEAD", submodule_head)) {2196/* Do not descend and nuke a nested git work tree. */2197if(kept_up)2198*kept_up =1;2199return0;2200}22012202 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2203 dir =opendir(path->buf);2204if(!dir) {2205if(errno == ENOENT)2206return keep_toplevel ? -1:0;2207else if(errno == EACCES && !keep_toplevel)2208/*2209 * An empty dir could be removable even if it2210 * is unreadable:2211 */2212returnrmdir(path->buf);2213else2214return-1;2215}2216strbuf_complete(path,'/');22172218 len = path->len;2219while((e =readdir(dir)) != NULL) {2220struct stat st;2221if(is_dot_or_dotdot(e->d_name))2222continue;22232224strbuf_setlen(path, len);2225strbuf_addstr(path, e->d_name);2226if(lstat(path->buf, &st)) {2227if(errno == ENOENT)2228/*2229 * file disappeared, which is what we2230 * wanted anyway2231 */2232continue;2233/* fall thru */2234}else if(S_ISDIR(st.st_mode)) {2235if(!remove_dir_recurse(path, flag, &kept_down))2236continue;/* happy */2237}else if(!only_empty &&2238(!unlink(path->buf) || errno == ENOENT)) {2239continue;/* happy, too */2240}22412242/* path too long, stat fails, or non-directory still exists */2243 ret = -1;2244break;2245}2246closedir(dir);22472248strbuf_setlen(path, original_len);2249if(!ret && !keep_toplevel && !kept_down)2250 ret = (!rmdir(path->buf) || errno == ENOENT) ?0: -1;2251else if(kept_up)2252/*2253 * report the uplevel that it is not an error that we2254 * did not rmdir() our directory.2255 */2256*kept_up = !ret;2257return ret;2258}22592260intremove_dir_recursively(struct strbuf *path,int flag)2261{2262returnremove_dir_recurse(path, flag, NULL);2263}22642265staticGIT_PATH_FUNC(git_path_info_exclude,"info/exclude")22662267voidsetup_standard_excludes(struct dir_struct *dir)2268{2269 dir->exclude_per_dir =".gitignore";22702271/* core.excludefile defaulting to $XDG_HOME/git/ignore */2272if(!excludes_file)2273 excludes_file =xdg_config_home("ignore");2274if(excludes_file && !access_or_warn(excludes_file, R_OK,0))2275add_excludes_from_file_1(dir, excludes_file,2276 dir->untracked ? &dir->ss_excludes_file : NULL);22772278/* per repository user preference */2279if(startup_info->have_repository) {2280const char*path =git_path_info_exclude();2281if(!access_or_warn(path, R_OK,0))2282add_excludes_from_file_1(dir, path,2283 dir->untracked ? &dir->ss_info_exclude : NULL);2284}2285}22862287intremove_path(const char*name)2288{2289char*slash;22902291if(unlink(name) && errno != ENOENT && errno != ENOTDIR)2292return-1;22932294 slash =strrchr(name,'/');2295if(slash) {2296char*dirs =xstrdup(name);2297 slash = dirs + (slash - name);2298do{2299*slash ='\0';2300}while(rmdir(dirs) ==0&& (slash =strrchr(dirs,'/')));2301free(dirs);2302}2303return0;2304}23052306/*2307 * Frees memory within dir which was allocated for exclude lists and2308 * the exclude_stack. Does not free dir itself.2309 */2310voidclear_directory(struct dir_struct *dir)2311{2312int i, j;2313struct exclude_list_group *group;2314struct exclude_list *el;2315struct exclude_stack *stk;23162317for(i = EXC_CMDL; i <= EXC_FILE; i++) {2318 group = &dir->exclude_list_group[i];2319for(j =0; j < group->nr; j++) {2320 el = &group->el[j];2321if(i == EXC_DIRS)2322free((char*)el->src);2323clear_exclude_list(el);2324}2325free(group->el);2326}23272328 stk = dir->exclude_stack;2329while(stk) {2330struct exclude_stack *prev = stk->prev;2331free(stk);2332 stk = prev;2333}2334strbuf_release(&dir->basebuf);2335}23362337struct ondisk_untracked_cache {2338struct stat_data info_exclude_stat;2339struct stat_data excludes_file_stat;2340uint32_t dir_flags;2341unsigned char info_exclude_sha1[20];2342unsigned char excludes_file_sha1[20];2343char exclude_per_dir[FLEX_ARRAY];2344};23452346#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)23472348struct write_data {2349int index;/* number of written untracked_cache_dir */2350struct ewah_bitmap *check_only;/* from untracked_cache_dir */2351struct ewah_bitmap *valid;/* from untracked_cache_dir */2352struct ewah_bitmap *sha1_valid;/* set if exclude_sha1 is not null */2353struct strbuf out;2354struct strbuf sb_stat;2355struct strbuf sb_sha1;2356};23572358static voidstat_data_to_disk(struct stat_data *to,const struct stat_data *from)2359{2360 to->sd_ctime.sec =htonl(from->sd_ctime.sec);2361 to->sd_ctime.nsec =htonl(from->sd_ctime.nsec);2362 to->sd_mtime.sec =htonl(from->sd_mtime.sec);2363 to->sd_mtime.nsec =htonl(from->sd_mtime.nsec);2364 to->sd_dev =htonl(from->sd_dev);2365 to->sd_ino =htonl(from->sd_ino);2366 to->sd_uid =htonl(from->sd_uid);2367 to->sd_gid =htonl(from->sd_gid);2368 to->sd_size =htonl(from->sd_size);2369}23702371static voidwrite_one_dir(struct untracked_cache_dir *untracked,2372struct write_data *wd)2373{2374struct stat_data stat_data;2375struct strbuf *out = &wd->out;2376unsigned char intbuf[16];2377unsigned int intlen, value;2378int i = wd->index++;23792380/*2381 * untracked_nr should be reset whenever valid is clear, but2382 * for safety..2383 */2384if(!untracked->valid) {2385 untracked->untracked_nr =0;2386 untracked->check_only =0;2387}23882389if(untracked->check_only)2390ewah_set(wd->check_only, i);2391if(untracked->valid) {2392ewah_set(wd->valid, i);2393stat_data_to_disk(&stat_data, &untracked->stat_data);2394strbuf_add(&wd->sb_stat, &stat_data,sizeof(stat_data));2395}2396if(!is_null_sha1(untracked->exclude_sha1)) {2397ewah_set(wd->sha1_valid, i);2398strbuf_add(&wd->sb_sha1, untracked->exclude_sha1,20);2399}24002401 intlen =encode_varint(untracked->untracked_nr, intbuf);2402strbuf_add(out, intbuf, intlen);24032404/* skip non-recurse directories */2405for(i =0, value =0; i < untracked->dirs_nr; i++)2406if(untracked->dirs[i]->recurse)2407 value++;2408 intlen =encode_varint(value, intbuf);2409strbuf_add(out, intbuf, intlen);24102411strbuf_add(out, untracked->name,strlen(untracked->name) +1);24122413for(i =0; i < untracked->untracked_nr; i++)2414strbuf_add(out, untracked->untracked[i],2415strlen(untracked->untracked[i]) +1);24162417for(i =0; i < untracked->dirs_nr; i++)2418if(untracked->dirs[i]->recurse)2419write_one_dir(untracked->dirs[i], wd);2420}24212422voidwrite_untracked_extension(struct strbuf *out,struct untracked_cache *untracked)2423{2424struct ondisk_untracked_cache *ouc;2425struct write_data wd;2426unsigned char varbuf[16];2427int varint_len;2428size_t len =strlen(untracked->exclude_per_dir);24292430FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);2431stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2432stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2433hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);2434hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);2435 ouc->dir_flags =htonl(untracked->dir_flags);24362437 varint_len =encode_varint(untracked->ident.len, varbuf);2438strbuf_add(out, varbuf, varint_len);2439strbuf_addbuf(out, &untracked->ident);24402441strbuf_add(out, ouc,ouc_size(len));2442free(ouc);2443 ouc = NULL;24442445if(!untracked->root) {2446 varint_len =encode_varint(0, varbuf);2447strbuf_add(out, varbuf, varint_len);2448return;2449}24502451 wd.index =0;2452 wd.check_only =ewah_new();2453 wd.valid =ewah_new();2454 wd.sha1_valid =ewah_new();2455strbuf_init(&wd.out,1024);2456strbuf_init(&wd.sb_stat,1024);2457strbuf_init(&wd.sb_sha1,1024);2458write_one_dir(untracked->root, &wd);24592460 varint_len =encode_varint(wd.index, varbuf);2461strbuf_add(out, varbuf, varint_len);2462strbuf_addbuf(out, &wd.out);2463ewah_serialize_strbuf(wd.valid, out);2464ewah_serialize_strbuf(wd.check_only, out);2465ewah_serialize_strbuf(wd.sha1_valid, out);2466strbuf_addbuf(out, &wd.sb_stat);2467strbuf_addbuf(out, &wd.sb_sha1);2468strbuf_addch(out,'\0');/* safe guard for string lists */24692470ewah_free(wd.valid);2471ewah_free(wd.check_only);2472ewah_free(wd.sha1_valid);2473strbuf_release(&wd.out);2474strbuf_release(&wd.sb_stat);2475strbuf_release(&wd.sb_sha1);2476}24772478static voidfree_untracked(struct untracked_cache_dir *ucd)2479{2480int i;2481if(!ucd)2482return;2483for(i =0; i < ucd->dirs_nr; i++)2484free_untracked(ucd->dirs[i]);2485for(i =0; i < ucd->untracked_nr; i++)2486free(ucd->untracked[i]);2487free(ucd->untracked);2488free(ucd->dirs);2489free(ucd);2490}24912492voidfree_untracked_cache(struct untracked_cache *uc)2493{2494if(uc)2495free_untracked(uc->root);2496free(uc);2497}24982499struct read_data {2500int index;2501struct untracked_cache_dir **ucd;2502struct ewah_bitmap *check_only;2503struct ewah_bitmap *valid;2504struct ewah_bitmap *sha1_valid;2505const unsigned char*data;2506const unsigned char*end;2507};25082509static voidstat_data_from_disk(struct stat_data *to,const struct stat_data *from)2510{2511 to->sd_ctime.sec =get_be32(&from->sd_ctime.sec);2512 to->sd_ctime.nsec =get_be32(&from->sd_ctime.nsec);2513 to->sd_mtime.sec =get_be32(&from->sd_mtime.sec);2514 to->sd_mtime.nsec =get_be32(&from->sd_mtime.nsec);2515 to->sd_dev =get_be32(&from->sd_dev);2516 to->sd_ino =get_be32(&from->sd_ino);2517 to->sd_uid =get_be32(&from->sd_uid);2518 to->sd_gid =get_be32(&from->sd_gid);2519 to->sd_size =get_be32(&from->sd_size);2520}25212522static intread_one_dir(struct untracked_cache_dir **untracked_,2523struct read_data *rd)2524{2525struct untracked_cache_dir ud, *untracked;2526const unsigned char*next, *data = rd->data, *end = rd->end;2527unsigned int value;2528int i, len;25292530memset(&ud,0,sizeof(ud));25312532 next = data;2533 value =decode_varint(&next);2534if(next > end)2535return-1;2536 ud.recurse =1;2537 ud.untracked_alloc = value;2538 ud.untracked_nr = value;2539if(ud.untracked_nr)2540ALLOC_ARRAY(ud.untracked, ud.untracked_nr);2541 data = next;25422543 next = data;2544 ud.dirs_alloc = ud.dirs_nr =decode_varint(&next);2545if(next > end)2546return-1;2547ALLOC_ARRAY(ud.dirs, ud.dirs_nr);2548 data = next;25492550 len =strlen((const char*)data);2551 next = data + len +1;2552if(next > rd->end)2553return-1;2554*untracked_ = untracked =xmalloc(st_add(sizeof(*untracked), len));2555memcpy(untracked, &ud,sizeof(ud));2556memcpy(untracked->name, data, len +1);2557 data = next;25582559for(i =0; i < untracked->untracked_nr; i++) {2560 len =strlen((const char*)data);2561 next = data + len +1;2562if(next > rd->end)2563return-1;2564 untracked->untracked[i] =xstrdup((const char*)data);2565 data = next;2566}25672568 rd->ucd[rd->index++] = untracked;2569 rd->data = data;25702571for(i =0; i < untracked->dirs_nr; i++) {2572 len =read_one_dir(untracked->dirs + i, rd);2573if(len <0)2574return-1;2575}2576return0;2577}25782579static voidset_check_only(size_t pos,void*cb)2580{2581struct read_data *rd = cb;2582struct untracked_cache_dir *ud = rd->ucd[pos];2583 ud->check_only =1;2584}25852586static voidread_stat(size_t pos,void*cb)2587{2588struct read_data *rd = cb;2589struct untracked_cache_dir *ud = rd->ucd[pos];2590if(rd->data +sizeof(struct stat_data) > rd->end) {2591 rd->data = rd->end +1;2592return;2593}2594stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);2595 rd->data +=sizeof(struct stat_data);2596 ud->valid =1;2597}25982599static voidread_sha1(size_t pos,void*cb)2600{2601struct read_data *rd = cb;2602struct untracked_cache_dir *ud = rd->ucd[pos];2603if(rd->data +20> rd->end) {2604 rd->data = rd->end +1;2605return;2606}2607hashcpy(ud->exclude_sha1, rd->data);2608 rd->data +=20;2609}26102611static voidload_sha1_stat(struct sha1_stat *sha1_stat,2612const struct stat_data *stat,2613const unsigned char*sha1)2614{2615stat_data_from_disk(&sha1_stat->stat, stat);2616hashcpy(sha1_stat->sha1, sha1);2617 sha1_stat->valid =1;2618}26192620struct untracked_cache *read_untracked_extension(const void*data,unsigned long sz)2621{2622const struct ondisk_untracked_cache *ouc;2623struct untracked_cache *uc;2624struct read_data rd;2625const unsigned char*next = data, *end = (const unsigned char*)data + sz;2626const char*ident;2627int ident_len, len;26282629if(sz <=1|| end[-1] !='\0')2630return NULL;2631 end--;26322633 ident_len =decode_varint(&next);2634if(next + ident_len > end)2635return NULL;2636 ident = (const char*)next;2637 next += ident_len;26382639 ouc = (const struct ondisk_untracked_cache *)next;2640if(next +ouc_size(0) > end)2641return NULL;26422643 uc =xcalloc(1,sizeof(*uc));2644strbuf_init(&uc->ident, ident_len);2645strbuf_add(&uc->ident, ident, ident_len);2646load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,2647 ouc->info_exclude_sha1);2648load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,2649 ouc->excludes_file_sha1);2650 uc->dir_flags =get_be32(&ouc->dir_flags);2651 uc->exclude_per_dir =xstrdup(ouc->exclude_per_dir);2652/* NUL after exclude_per_dir is covered by sizeof(*ouc) */2653 next +=ouc_size(strlen(ouc->exclude_per_dir));2654if(next >= end)2655goto done2;26562657 len =decode_varint(&next);2658if(next > end || len ==0)2659goto done2;26602661 rd.valid =ewah_new();2662 rd.check_only =ewah_new();2663 rd.sha1_valid =ewah_new();2664 rd.data = next;2665 rd.end = end;2666 rd.index =0;2667ALLOC_ARRAY(rd.ucd, len);26682669if(read_one_dir(&uc->root, &rd) || rd.index != len)2670goto done;26712672 next = rd.data;2673 len =ewah_read_mmap(rd.valid, next, end - next);2674if(len <0)2675goto done;26762677 next += len;2678 len =ewah_read_mmap(rd.check_only, next, end - next);2679if(len <0)2680goto done;26812682 next += len;2683 len =ewah_read_mmap(rd.sha1_valid, next, end - next);2684if(len <0)2685goto done;26862687ewah_each_bit(rd.check_only, set_check_only, &rd);2688 rd.data = next + len;2689ewah_each_bit(rd.valid, read_stat, &rd);2690ewah_each_bit(rd.sha1_valid, read_sha1, &rd);2691 next = rd.data;26922693done:2694free(rd.ucd);2695ewah_free(rd.valid);2696ewah_free(rd.check_only);2697ewah_free(rd.sha1_valid);2698done2:2699if(next != end) {2700free_untracked_cache(uc);2701 uc = NULL;2702}2703return uc;2704}27052706static voidinvalidate_one_directory(struct untracked_cache *uc,2707struct untracked_cache_dir *ucd)2708{2709 uc->dir_invalidated++;2710 ucd->valid =0;2711 ucd->untracked_nr =0;2712}27132714/*2715 * Normally when an entry is added or removed from a directory,2716 * invalidating that directory is enough. No need to touch its2717 * ancestors. When a directory is shown as "foo/bar/" in git-status2718 * however, deleting or adding an entry may have cascading effect.2719 *2720 * Say the "foo/bar/file" has become untracked, we need to tell the2721 * untracked_cache_dir of "foo" that "bar/" is not an untracked2722 * directory any more (because "bar" is managed by foo as an untracked2723 * "file").2724 *2725 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2726 * was the last untracked entry in the entire "foo", we should show2727 * "foo/" instead. Which means we have to invalidate past "bar" up to2728 * "foo".2729 *2730 * This function traverses all directories from root to leaf. If there2731 * is a chance of one of the above cases happening, we invalidate back2732 * to root. Otherwise we just invalidate the leaf. There may be a more2733 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2734 * detect these cases and avoid unnecessary invalidation, for example,2735 * checking for the untracked entry named "bar/" in "foo", but for now2736 * stick to something safe and simple.2737 */2738static intinvalidate_one_component(struct untracked_cache *uc,2739struct untracked_cache_dir *dir,2740const char*path,int len)2741{2742const char*rest =strchr(path,'/');27432744if(rest) {2745int component_len = rest - path;2746struct untracked_cache_dir *d =2747lookup_untracked(uc, dir, path, component_len);2748int ret =2749invalidate_one_component(uc, d, rest +1,2750 len - (component_len +1));2751if(ret)2752invalidate_one_directory(uc, dir);2753return ret;2754}27552756invalidate_one_directory(uc, dir);2757return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2758}27592760voiduntracked_cache_invalidate_path(struct index_state *istate,2761const char*path)2762{2763if(!istate->untracked || !istate->untracked->root)2764return;2765invalidate_one_component(istate->untracked, istate->untracked->root,2766 path,strlen(path));2767}27682769voiduntracked_cache_remove_from_index(struct index_state *istate,2770const char*path)2771{2772untracked_cache_invalidate_path(istate, path);2773}27742775voiduntracked_cache_add_to_index(struct index_state *istate,2776const char*path)2777{2778untracked_cache_invalidate_path(istate, path);2779}27802781/* Update gitfile and core.worktree setting to connect work tree and git dir */2782voidconnect_work_tree_and_git_dir(const char*work_tree_,const char*git_dir_)2783{2784struct strbuf gitfile_sb = STRBUF_INIT;2785struct strbuf cfg_sb = STRBUF_INIT;2786struct strbuf rel_path = STRBUF_INIT;2787char*git_dir, *work_tree;27882789/* Prepare .git file */2790strbuf_addf(&gitfile_sb,"%s/.git", work_tree_);2791if(safe_create_leading_directories_const(gitfile_sb.buf))2792die(_("could not create directories for%s"), gitfile_sb.buf);27932794/* Prepare config file */2795strbuf_addf(&cfg_sb,"%s/config", git_dir_);2796if(safe_create_leading_directories_const(cfg_sb.buf))2797die(_("could not create directories for%s"), cfg_sb.buf);27982799 git_dir =real_pathdup(git_dir_,1);2800 work_tree =real_pathdup(work_tree_,1);28012802/* Write .git file */2803write_file(gitfile_sb.buf,"gitdir:%s",2804relative_path(git_dir, work_tree, &rel_path));2805/* Update core.worktree setting */2806git_config_set_in_file(cfg_sb.buf,"core.worktree",2807relative_path(work_tree, git_dir, &rel_path));28082809strbuf_release(&gitfile_sb);2810strbuf_release(&cfg_sb);2811strbuf_release(&rel_path);2812free(work_tree);2813free(git_dir);2814}28152816/*2817 * Migrate the git directory of the given path from old_git_dir to new_git_dir.2818 */2819voidrelocate_gitdir(const char*path,const char*old_git_dir,const char*new_git_dir)2820{2821if(rename(old_git_dir, new_git_dir) <0)2822die_errno(_("could not migrate git directory from '%s' to '%s'"),2823 old_git_dir, new_git_dir);28242825connect_work_tree_and_git_dir(path, new_git_dir);2826}