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 { 20int len; 21const 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 { 41DIR*fdir; 42struct untracked_cache_dir *untracked; 43int nr_files; 44int nr_dirs; 45 46struct dirent *de; 47const char*file; 48struct untracked_cache_dir *ucd; 49}; 50 51static enum path_treatment read_directory_recursive(struct dir_struct *dir, 52const char*path,int len,struct untracked_cache_dir *untracked, 53int check_only,const struct path_simplify *simplify); 54static intget_dtype(struct dirent *de,const char*path,int len); 55 56/* helper string functions with support for the ignore_case flag */ 57intstrcmp_icase(const char*a,const char*b) 58{ 59return ignore_case ?strcasecmp(a, b) :strcmp(a, b); 60} 61 62intstrncmp_icase(const char*a,const char*b,size_t count) 63{ 64return ignore_case ?strncasecmp(a, b, count) :strncmp(a, b, count); 65} 66 67intfnmatch_icase(const char*pattern,const char*string,int flags) 68{ 69returnwildmatch(pattern, string, 70 flags | (ignore_case ? WM_CASEFOLD :0), 71 NULL); 72} 73 74intgit_fnmatch(const struct pathspec_item *item, 75const char*pattern,const char*string, 76int prefix) 77{ 78if(prefix >0) { 79if(ps_strncmp(item, pattern, string, prefix)) 80return WM_NOMATCH; 81 pattern += prefix; 82 string += prefix; 83} 84if(item->flags & PATHSPEC_ONESTAR) { 85int pattern_len =strlen(++pattern); 86int string_len =strlen(string); 87return string_len < pattern_len || 88ps_strcmp(item, pattern, 89 string + string_len - pattern_len); 90} 91if(item->magic & PATHSPEC_GLOB) 92returnwildmatch(pattern, string, 93 WM_PATHNAME | 94(item->magic & PATHSPEC_ICASE ? WM_CASEFOLD :0), 95 NULL); 96else 97/* wildmatch has not learned no FNM_PATHNAME mode yet */ 98returnwildmatch(pattern, string, 99 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD :0, 100 NULL); 101} 102 103static intfnmatch_icase_mem(const char*pattern,int patternlen, 104const char*string,int stringlen, 105int flags) 106{ 107int match_status; 108struct strbuf pat_buf = STRBUF_INIT; 109struct strbuf str_buf = STRBUF_INIT; 110const char*use_pat = pattern; 111const char*use_str = string; 112 113if(pattern[patternlen]) { 114strbuf_add(&pat_buf, pattern, patternlen); 115 use_pat = pat_buf.buf; 116} 117if(string[stringlen]) { 118strbuf_add(&str_buf, string, stringlen); 119 use_str = str_buf.buf; 120} 121 122if(ignore_case) 123 flags |= WM_CASEFOLD; 124 match_status =wildmatch(use_pat, use_str, flags, NULL); 125 126strbuf_release(&pat_buf); 127strbuf_release(&str_buf); 128 129return match_status; 130} 131 132static size_tcommon_prefix_len(const struct pathspec *pathspec) 133{ 134int n; 135size_t max =0; 136 137/* 138 * ":(icase)path" is treated as a pathspec full of 139 * wildcard. In other words, only prefix is considered common 140 * prefix. If the pathspec is abc/foo abc/bar, running in 141 * subdir xyz, the common prefix is still xyz, not xuz/abc as 142 * in non-:(icase). 143 */ 144GUARD_PATHSPEC(pathspec, 145 PATHSPEC_FROMTOP | 146 PATHSPEC_MAXDEPTH | 147 PATHSPEC_LITERAL | 148 PATHSPEC_GLOB | 149 PATHSPEC_ICASE | 150 PATHSPEC_EXCLUDE); 151 152for(n =0; n < pathspec->nr; n++) { 153size_t i =0, len =0, item_len; 154if(pathspec->items[n].magic & PATHSPEC_EXCLUDE) 155continue; 156if(pathspec->items[n].magic & PATHSPEC_ICASE) 157 item_len = pathspec->items[n].prefix; 158else 159 item_len = pathspec->items[n].nowildcard_len; 160while(i < item_len && (n ==0|| i < max)) { 161char c = pathspec->items[n].match[i]; 162if(c != pathspec->items[0].match[i]) 163break; 164if(c =='/') 165 len = i +1; 166 i++; 167} 168if(n ==0|| len < max) { 169 max = len; 170if(!max) 171break; 172} 173} 174return max; 175} 176 177/* 178 * Returns a copy of the longest leading path common among all 179 * pathspecs. 180 */ 181char*common_prefix(const struct pathspec *pathspec) 182{ 183unsigned long len =common_prefix_len(pathspec); 184 185return len ?xmemdupz(pathspec->items[0].match, len) : NULL; 186} 187 188intfill_directory(struct dir_struct *dir,const struct pathspec *pathspec) 189{ 190size_t len; 191 192/* 193 * Calculate common prefix for the pathspec, and 194 * use that to optimize the directory walk 195 */ 196 len =common_prefix_len(pathspec); 197 198/* Read the directory and prune it */ 199read_directory(dir, pathspec->nr ? pathspec->_raw[0] :"", len, pathspec); 200return len; 201} 202 203intwithin_depth(const char*name,int namelen, 204int depth,int max_depth) 205{ 206const char*cp = name, *cpe = name + namelen; 207 208while(cp < cpe) { 209if(*cp++ !='/') 210continue; 211 depth++; 212if(depth > max_depth) 213return0; 214} 215return1; 216} 217 218#define DO_MATCH_EXCLUDE 1 219#define DO_MATCH_DIRECTORY 2 220 221/* 222 * Does 'match' match the given name? 223 * A match is found if 224 * 225 * (1) the 'match' string is leading directory of 'name', or 226 * (2) the 'match' string is a wildcard and matches 'name', or 227 * (3) the 'match' string is exactly the same as 'name'. 228 * 229 * and the return value tells which case it was. 230 * 231 * It returns 0 when there is no match. 232 */ 233static intmatch_pathspec_item(const struct pathspec_item *item,int prefix, 234const char*name,int namelen,unsigned flags) 235{ 236/* name/namelen has prefix cut off by caller */ 237const char*match = item->match + prefix; 238int matchlen = item->len - prefix; 239 240/* 241 * The normal call pattern is: 242 * 1. prefix = common_prefix_len(ps); 243 * 2. prune something, or fill_directory 244 * 3. match_pathspec() 245 * 246 * 'prefix' at #1 may be shorter than the command's prefix and 247 * it's ok for #2 to match extra files. Those extras will be 248 * trimmed at #3. 249 * 250 * Suppose the pathspec is 'foo' and '../bar' running from 251 * subdir 'xyz'. The common prefix at #1 will be empty, thanks 252 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The 253 * user does not want XYZ/foo, only the "foo" part should be 254 * case-insensitive. We need to filter out XYZ/foo here. In 255 * other words, we do not trust the caller on comparing the 256 * prefix part when :(icase) is involved. We do exact 257 * comparison ourselves. 258 * 259 * Normally the caller (common_prefix_len() in fact) does 260 * _exact_ matching on name[-prefix+1..-1] and we do not need 261 * to check that part. Be defensive and check it anyway, in 262 * case common_prefix_len is changed, or a new caller is 263 * introduced that does not use common_prefix_len. 264 * 265 * If the penalty turns out too high when prefix is really 266 * long, maybe change it to 267 * strncmp(match, name, item->prefix - prefix) 268 */ 269if(item->prefix && (item->magic & PATHSPEC_ICASE) && 270strncmp(item->match, name - prefix, item->prefix)) 271return0; 272 273/* If the match was just the prefix, we matched */ 274if(!*match) 275return MATCHED_RECURSIVELY; 276 277if(matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) { 278if(matchlen == namelen) 279return MATCHED_EXACTLY; 280 281if(match[matchlen-1] =='/'|| name[matchlen] =='/') 282return MATCHED_RECURSIVELY; 283}else if((flags & DO_MATCH_DIRECTORY) && 284 match[matchlen -1] =='/'&& 285 namelen == matchlen -1&& 286!ps_strncmp(item, match, name, namelen)) 287return MATCHED_EXACTLY; 288 289if(item->nowildcard_len < item->len && 290!git_fnmatch(item, match, name, 291 item->nowildcard_len - prefix)) 292return MATCHED_FNMATCH; 293 294return0; 295} 296 297/* 298 * Given a name and a list of pathspecs, returns the nature of the 299 * closest (i.e. most specific) match of the name to any of the 300 * pathspecs. 301 * 302 * The caller typically calls this multiple times with the same 303 * pathspec and seen[] array but with different name/namelen 304 * (e.g. entries from the index) and is interested in seeing if and 305 * how each pathspec matches all the names it calls this function 306 * with. A mark is left in the seen[] array for each pathspec element 307 * indicating the closest type of match that element achieved, so if 308 * seen[n] remains zero after multiple invocations, that means the nth 309 * pathspec did not match any names, which could indicate that the 310 * user mistyped the nth pathspec. 311 */ 312static intdo_match_pathspec(const struct pathspec *ps, 313const char*name,int namelen, 314int prefix,char*seen, 315unsigned flags) 316{ 317int i, retval =0, exclude = flags & DO_MATCH_EXCLUDE; 318 319GUARD_PATHSPEC(ps, 320 PATHSPEC_FROMTOP | 321 PATHSPEC_MAXDEPTH | 322 PATHSPEC_LITERAL | 323 PATHSPEC_GLOB | 324 PATHSPEC_ICASE | 325 PATHSPEC_EXCLUDE); 326 327if(!ps->nr) { 328if(!ps->recursive || 329!(ps->magic & PATHSPEC_MAXDEPTH) || 330 ps->max_depth == -1) 331return MATCHED_RECURSIVELY; 332 333if(within_depth(name, namelen,0, ps->max_depth)) 334return MATCHED_EXACTLY; 335else 336return0; 337} 338 339 name += prefix; 340 namelen -= prefix; 341 342for(i = ps->nr -1; i >=0; i--) { 343int how; 344 345if((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) || 346( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE))) 347continue; 348 349if(seen && seen[i] == MATCHED_EXACTLY) 350continue; 351/* 352 * Make exclude patterns optional and never report 353 * "pathspec ':(exclude)foo' matches no files" 354 */ 355if(seen && ps->items[i].magic & PATHSPEC_EXCLUDE) 356 seen[i] = MATCHED_FNMATCH; 357 how =match_pathspec_item(ps->items+i, prefix, name, 358 namelen, flags); 359if(ps->recursive && 360(ps->magic & PATHSPEC_MAXDEPTH) && 361 ps->max_depth != -1&& 362 how && how != MATCHED_FNMATCH) { 363int len = ps->items[i].len; 364if(name[len] =='/') 365 len++; 366if(within_depth(name+len, namelen-len,0, ps->max_depth)) 367 how = MATCHED_EXACTLY; 368else 369 how =0; 370} 371if(how) { 372if(retval < how) 373 retval = how; 374if(seen && seen[i] < how) 375 seen[i] = how; 376} 377} 378return retval; 379} 380 381intmatch_pathspec(const struct pathspec *ps, 382const char*name,int namelen, 383int prefix,char*seen,int is_dir) 384{ 385int positive, negative; 386unsigned flags = is_dir ? DO_MATCH_DIRECTORY :0; 387 positive =do_match_pathspec(ps, name, namelen, 388 prefix, seen, flags); 389if(!(ps->magic & PATHSPEC_EXCLUDE) || !positive) 390return positive; 391 negative =do_match_pathspec(ps, name, namelen, 392 prefix, seen, 393 flags | DO_MATCH_EXCLUDE); 394return negative ?0: positive; 395} 396 397intreport_path_error(const char*ps_matched, 398const struct pathspec *pathspec, 399const char*prefix) 400{ 401/* 402 * Make sure all pathspec matched; otherwise it is an error. 403 */ 404int num, errors =0; 405for(num =0; num < pathspec->nr; num++) { 406int other, found_dup; 407 408if(ps_matched[num]) 409continue; 410/* 411 * The caller might have fed identical pathspec 412 * twice. Do not barf on such a mistake. 413 * FIXME: parse_pathspec should have eliminated 414 * duplicate pathspec. 415 */ 416for(found_dup = other =0; 417!found_dup && other < pathspec->nr; 418 other++) { 419if(other == num || !ps_matched[other]) 420continue; 421if(!strcmp(pathspec->items[other].original, 422 pathspec->items[num].original)) 423/* 424 * Ok, we have a match already. 425 */ 426 found_dup =1; 427} 428if(found_dup) 429continue; 430 431error("pathspec '%s' did not match any file(s) known to git.", 432 pathspec->items[num].original); 433 errors++; 434} 435return errors; 436} 437 438/* 439 * Return the length of the "simple" part of a path match limiter. 440 */ 441intsimple_length(const char*match) 442{ 443int len = -1; 444 445for(;;) { 446unsigned char c = *match++; 447 len++; 448if(c =='\0'||is_glob_special(c)) 449return len; 450} 451} 452 453intno_wildcard(const char*string) 454{ 455return string[simple_length(string)] =='\0'; 456} 457 458voidparse_exclude_pattern(const char**pattern, 459int*patternlen, 460int*flags, 461int*nowildcardlen) 462{ 463const char*p = *pattern; 464size_t i, len; 465 466*flags =0; 467if(*p =='!') { 468*flags |= EXC_FLAG_NEGATIVE; 469 p++; 470} 471 len =strlen(p); 472if(len && p[len -1] =='/') { 473 len--; 474*flags |= EXC_FLAG_MUSTBEDIR; 475} 476for(i =0; i < len; i++) { 477if(p[i] =='/') 478break; 479} 480if(i == len) 481*flags |= EXC_FLAG_NODIR; 482*nowildcardlen =simple_length(p); 483/* 484 * we should have excluded the trailing slash from 'p' too, 485 * but that's one more allocation. Instead just make sure 486 * nowildcardlen does not exceed real patternlen 487 */ 488if(*nowildcardlen > len) 489*nowildcardlen = len; 490if(*p =='*'&&no_wildcard(p +1)) 491*flags |= EXC_FLAG_ENDSWITH; 492*pattern = p; 493*patternlen = len; 494} 495 496voidadd_exclude(const char*string,const char*base, 497int baselen,struct exclude_list *el,int srcpos) 498{ 499struct exclude *x; 500int patternlen; 501int flags; 502int nowildcardlen; 503 504parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); 505if(flags & EXC_FLAG_MUSTBEDIR) { 506char*s; 507 x =xmalloc(sizeof(*x) + patternlen +1); 508 s = (char*)(x+1); 509memcpy(s, string, patternlen); 510 s[patternlen] ='\0'; 511 x->pattern = s; 512}else{ 513 x =xmalloc(sizeof(*x)); 514 x->pattern = string; 515} 516 x->patternlen = patternlen; 517 x->nowildcardlen = nowildcardlen; 518 x->base = base; 519 x->baselen = baselen; 520 x->flags = flags; 521 x->srcpos = srcpos; 522ALLOC_GROW(el->excludes, el->nr +1, el->alloc); 523 el->excludes[el->nr++] = x; 524 x->el = el; 525} 526 527static void*read_skip_worktree_file_from_index(const char*path,size_t*size, 528struct sha1_stat *sha1_stat) 529{ 530int pos, len; 531unsigned long sz; 532enum object_type type; 533void*data; 534 535 len =strlen(path); 536 pos =cache_name_pos(path, len); 537if(pos <0) 538return NULL; 539if(!ce_skip_worktree(active_cache[pos])) 540return NULL; 541 data =read_sha1_file(active_cache[pos]->sha1, &type, &sz); 542if(!data || type != OBJ_BLOB) { 543free(data); 544return NULL; 545} 546*size =xsize_t(sz); 547if(sha1_stat) { 548memset(&sha1_stat->stat,0,sizeof(sha1_stat->stat)); 549hashcpy(sha1_stat->sha1, active_cache[pos]->sha1); 550} 551return data; 552} 553 554/* 555 * Frees memory within el which was allocated for exclude patterns and 556 * the file buffer. Does not free el itself. 557 */ 558voidclear_exclude_list(struct exclude_list *el) 559{ 560int i; 561 562for(i =0; i < el->nr; i++) 563free(el->excludes[i]); 564free(el->excludes); 565free(el->filebuf); 566 567memset(el,0,sizeof(*el)); 568} 569 570static voidtrim_trailing_spaces(char*buf) 571{ 572char*p, *last_space = NULL; 573 574for(p = buf; *p; p++) 575switch(*p) { 576case' ': 577if(!last_space) 578 last_space = p; 579break; 580case'\\': 581 p++; 582if(!*p) 583return; 584/* fallthrough */ 585default: 586 last_space = NULL; 587} 588 589if(last_space) 590*last_space ='\0'; 591} 592 593/* 594 * Given a subdirectory name and "dir" of the current directory, 595 * search the subdir in "dir" and return it, or create a new one if it 596 * does not exist in "dir". 597 * 598 * If "name" has the trailing slash, it'll be excluded in the search. 599 */ 600static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc, 601struct untracked_cache_dir *dir, 602const char*name,int len) 603{ 604int first, last; 605struct untracked_cache_dir *d; 606if(!dir) 607return NULL; 608if(len && name[len -1] =='/') 609 len--; 610 first =0; 611 last = dir->dirs_nr; 612while(last > first) { 613int cmp, next = (last + first) >>1; 614 d = dir->dirs[next]; 615 cmp =strncmp(name, d->name, len); 616if(!cmp &&strlen(d->name) > len) 617 cmp = -1; 618if(!cmp) 619return d; 620if(cmp <0) { 621 last = next; 622continue; 623} 624 first = next+1; 625} 626 627 uc->dir_created++; 628 d =xmalloc(sizeof(*d) + len +1); 629memset(d,0,sizeof(*d)); 630memcpy(d->name, name, len); 631 d->name[len] ='\0'; 632 633ALLOC_GROW(dir->dirs, dir->dirs_nr +1, dir->dirs_alloc); 634memmove(dir->dirs + first +1, dir->dirs + first, 635(dir->dirs_nr - first) *sizeof(*dir->dirs)); 636 dir->dirs_nr++; 637 dir->dirs[first] = d; 638return d; 639} 640 641static voiddo_invalidate_gitignore(struct untracked_cache_dir *dir) 642{ 643int i; 644 dir->valid =0; 645 dir->untracked_nr =0; 646for(i =0; i < dir->dirs_nr; i++) 647do_invalidate_gitignore(dir->dirs[i]); 648} 649 650static voidinvalidate_gitignore(struct untracked_cache *uc, 651struct untracked_cache_dir *dir) 652{ 653 uc->gitignore_invalidated++; 654do_invalidate_gitignore(dir); 655} 656 657static voidinvalidate_directory(struct untracked_cache *uc, 658struct untracked_cache_dir *dir) 659{ 660int i; 661 uc->dir_invalidated++; 662 dir->valid =0; 663 dir->untracked_nr =0; 664for(i =0; i < dir->dirs_nr; i++) 665 dir->dirs[i]->recurse =0; 666} 667 668/* 669 * Given a file with name "fname", read it (either from disk, or from 670 * the index if "check_index" is non-zero), parse it and store the 671 * exclude rules in "el". 672 * 673 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill 674 * stat data from disk (only valid if add_excludes returns zero). If 675 * ss_valid is non-zero, "ss" must contain good value as input. 676 */ 677static intadd_excludes(const char*fname,const char*base,int baselen, 678struct exclude_list *el,int check_index, 679struct sha1_stat *sha1_stat) 680{ 681struct stat st; 682int fd, i, lineno =1; 683size_t size =0; 684char*buf, *entry; 685 686 fd =open(fname, O_RDONLY); 687if(fd <0||fstat(fd, &st) <0) { 688if(errno != ENOENT) 689warn_on_inaccessible(fname); 690if(0<= fd) 691close(fd); 692if(!check_index || 693(buf =read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL) 694return-1; 695if(size ==0) { 696free(buf); 697return0; 698} 699if(buf[size-1] !='\n') { 700 buf =xrealloc(buf, size+1); 701 buf[size++] ='\n'; 702} 703}else{ 704 size =xsize_t(st.st_size); 705if(size ==0) { 706if(sha1_stat) { 707fill_stat_data(&sha1_stat->stat, &st); 708hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN); 709 sha1_stat->valid =1; 710} 711close(fd); 712return0; 713} 714 buf =xmalloc(size+1); 715if(read_in_full(fd, buf, size) != size) { 716free(buf); 717close(fd); 718return-1; 719} 720 buf[size++] ='\n'; 721close(fd); 722if(sha1_stat) { 723int pos; 724if(sha1_stat->valid && 725!match_stat_data_racy(&the_index, &sha1_stat->stat, &st)) 726;/* no content change, ss->sha1 still good */ 727else if(check_index && 728(pos =cache_name_pos(fname,strlen(fname))) >=0&& 729!ce_stage(active_cache[pos]) && 730ce_uptodate(active_cache[pos]) && 731!would_convert_to_git(fname)) 732hashcpy(sha1_stat->sha1, active_cache[pos]->sha1); 733else 734hash_sha1_file(buf, size,"blob", sha1_stat->sha1); 735fill_stat_data(&sha1_stat->stat, &st); 736 sha1_stat->valid =1; 737} 738} 739 740 el->filebuf = buf; 741 742if(skip_utf8_bom(&buf, size)) 743 size -= buf - el->filebuf; 744 745 entry = buf; 746 747for(i =0; i < size; i++) { 748if(buf[i] =='\n') { 749if(entry != buf + i && entry[0] !='#') { 750 buf[i - (i && buf[i-1] =='\r')] =0; 751trim_trailing_spaces(entry); 752add_exclude(entry, base, baselen, el, lineno); 753} 754 lineno++; 755 entry = buf + i +1; 756} 757} 758return0; 759} 760 761intadd_excludes_from_file_to_list(const char*fname,const char*base, 762int baselen,struct exclude_list *el, 763int check_index) 764{ 765returnadd_excludes(fname, base, baselen, el, check_index, NULL); 766} 767 768struct exclude_list *add_exclude_list(struct dir_struct *dir, 769int group_type,const char*src) 770{ 771struct exclude_list *el; 772struct exclude_list_group *group; 773 774 group = &dir->exclude_list_group[group_type]; 775ALLOC_GROW(group->el, group->nr +1, group->alloc); 776 el = &group->el[group->nr++]; 777memset(el,0,sizeof(*el)); 778 el->src = src; 779return el; 780} 781 782/* 783 * Used to set up core.excludesfile and .git/info/exclude lists. 784 */ 785static voidadd_excludes_from_file_1(struct dir_struct *dir,const char*fname, 786struct sha1_stat *sha1_stat) 787{ 788struct exclude_list *el; 789/* 790 * catch setup_standard_excludes() that's called before 791 * dir->untracked is assigned. That function behaves 792 * differently when dir->untracked is non-NULL. 793 */ 794if(!dir->untracked) 795 dir->unmanaged_exclude_files++; 796 el =add_exclude_list(dir, EXC_FILE, fname); 797if(add_excludes(fname,"",0, el,0, sha1_stat) <0) 798die("cannot use%sas an exclude file", fname); 799} 800 801voidadd_excludes_from_file(struct dir_struct *dir,const char*fname) 802{ 803 dir->unmanaged_exclude_files++;/* see validate_untracked_cache() */ 804add_excludes_from_file_1(dir, fname, NULL); 805} 806 807intmatch_basename(const char*basename,int basenamelen, 808const char*pattern,int prefix,int patternlen, 809int flags) 810{ 811if(prefix == patternlen) { 812if(patternlen == basenamelen && 813!strncmp_icase(pattern, basename, basenamelen)) 814return1; 815}else if(flags & EXC_FLAG_ENDSWITH) { 816/* "*literal" matching against "fooliteral" */ 817if(patternlen -1<= basenamelen && 818!strncmp_icase(pattern +1, 819 basename + basenamelen - (patternlen -1), 820 patternlen -1)) 821return1; 822}else{ 823if(fnmatch_icase_mem(pattern, patternlen, 824 basename, basenamelen, 8250) ==0) 826return1; 827} 828return0; 829} 830 831intmatch_pathname(const char*pathname,int pathlen, 832const char*base,int baselen, 833const char*pattern,int prefix,int patternlen, 834int flags) 835{ 836const char*name; 837int namelen; 838 839/* 840 * match with FNM_PATHNAME; the pattern has base implicitly 841 * in front of it. 842 */ 843if(*pattern =='/') { 844 pattern++; 845 patternlen--; 846 prefix--; 847} 848 849/* 850 * baselen does not count the trailing slash. base[] may or 851 * may not end with a trailing slash though. 852 */ 853if(pathlen < baselen +1|| 854(baselen && pathname[baselen] !='/') || 855strncmp_icase(pathname, base, baselen)) 856return0; 857 858 namelen = baselen ? pathlen - baselen -1: pathlen; 859 name = pathname + pathlen - namelen; 860 861if(prefix) { 862/* 863 * if the non-wildcard part is longer than the 864 * remaining pathname, surely it cannot match. 865 */ 866if(prefix > namelen) 867return0; 868 869if(strncmp_icase(pattern, name, prefix)) 870return0; 871 pattern += prefix; 872 patternlen -= prefix; 873 name += prefix; 874 namelen -= prefix; 875 876/* 877 * If the whole pattern did not have a wildcard, 878 * then our prefix match is all we need; we 879 * do not need to call fnmatch at all. 880 */ 881if(!patternlen && !namelen) 882return1; 883/* 884 * This can happen when we ignore some exclude rules 885 * on directories in other to see if negative rules 886 * may match. E.g. 887 * 888 * /abc 889 * !/abc/def/ghi 890 * 891 * The pattern of interest is "/abc". On the first 892 * try, we should match path "abc" with this pattern 893 * in the "if" statement right above, but the caller 894 * ignores it. 895 * 896 * On the second try with paths within "abc", 897 * e.g. "abc/xyz", we come here and try to match it 898 * with "/abc". 899 */ 900if(!patternlen && namelen && *name =='/') 901return1; 902} 903 904returnfnmatch_icase_mem(pattern, patternlen, 905 name, namelen, 906 WM_PATHNAME) ==0; 907} 908 909/* 910 * Return non-zero if pathname is a directory and an ancestor of the 911 * literal path in a (negative) pattern. This is used to keep 912 * descending in "foo" and "foo/bar" when the pattern is 913 * "!foo/bar/.gitignore". "foo/notbar" will not be descended however. 914 */ 915static intmatch_neg_path(const char*pathname,int pathlen,int*dtype, 916const char*base,int baselen, 917const char*pattern,int prefix,int patternlen, 918int flags) 919{ 920assert((flags & EXC_FLAG_NEGATIVE) && !(flags & EXC_FLAG_NODIR)); 921 922if(*dtype == DT_UNKNOWN) 923*dtype =get_dtype(NULL, pathname, pathlen); 924if(*dtype != DT_DIR) 925return0; 926 927if(*pattern =='/') { 928 pattern++; 929 patternlen--; 930 prefix--; 931} 932 933if(baselen) { 934if(((pathlen < baselen && base[pathlen] =='/') || 935 pathlen == baselen) && 936!strncmp_icase(pathname, base, pathlen)) 937return1; 938 pathname += baselen +1; 939 pathlen -= baselen +1; 940} 941 942 943if(prefix && 944((pathlen < prefix && pattern[pathlen] =='/') && 945!strncmp_icase(pathname, pattern, pathlen))) 946return1; 947 948return0; 949} 950 951/* 952 * Scan the given exclude list in reverse to see whether pathname 953 * should be ignored. The first match (i.e. the last on the list), if 954 * any, determines the fate. Returns the exclude_list element which 955 * matched, or NULL for undecided. 956 */ 957static struct exclude *last_exclude_matching_from_list(const char*pathname, 958int pathlen, 959const char*basename, 960int*dtype, 961struct exclude_list *el) 962{ 963struct exclude *exc = NULL;/* undecided */ 964int i, matched_negative_path =0; 965 966if(!el->nr) 967return NULL;/* undefined */ 968 969for(i = el->nr -1;0<= i; i--) { 970struct exclude *x = el->excludes[i]; 971const char*exclude = x->pattern; 972int prefix = x->nowildcardlen; 973 974if(x->flags & EXC_FLAG_MUSTBEDIR) { 975if(*dtype == DT_UNKNOWN) 976*dtype =get_dtype(NULL, pathname, pathlen); 977if(*dtype != DT_DIR) 978continue; 979} 980 981if(x->flags & EXC_FLAG_NODIR) { 982if(match_basename(basename, 983 pathlen - (basename - pathname), 984 exclude, prefix, x->patternlen, 985 x->flags)) { 986 exc = x; 987break; 988} 989continue; 990} 991 992assert(x->baselen ==0|| x->base[x->baselen -1] =='/'); 993if(match_pathname(pathname, pathlen, 994 x->base, x->baselen ? x->baselen -1:0, 995 exclude, prefix, x->patternlen, x->flags)) { 996 exc = x; 997break; 998} 9991000if((x->flags & EXC_FLAG_NEGATIVE) && !matched_negative_path &&1001match_neg_path(pathname, pathlen, dtype, x->base,1002 x->baselen ? x->baselen -1:0,1003 exclude, prefix, x->patternlen, x->flags))1004 matched_negative_path =1;1005}1006if(exc &&1007!(exc->flags & EXC_FLAG_NEGATIVE) &&1008!(exc->flags & EXC_FLAG_NODIR) &&1009 matched_negative_path)1010 exc = NULL;1011return exc;1012}10131014/*1015 * Scan the list and let the last match determine the fate.1016 * Return 1 for exclude, 0 for include and -1 for undecided.1017 */1018intis_excluded_from_list(const char*pathname,1019int pathlen,const char*basename,int*dtype,1020struct exclude_list *el)1021{1022struct exclude *exclude;1023 exclude =last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);1024if(exclude)1025return exclude->flags & EXC_FLAG_NEGATIVE ?0:1;1026return-1;/* undecided */1027}10281029static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,1030const char*pathname,int pathlen,const char*basename,1031int*dtype_p)1032{1033int i, j;1034struct exclude_list_group *group;1035struct exclude *exclude;1036for(i = EXC_CMDL; i <= EXC_FILE; i++) {1037 group = &dir->exclude_list_group[i];1038for(j = group->nr -1; j >=0; j--) {1039 exclude =last_exclude_matching_from_list(1040 pathname, pathlen, basename, dtype_p,1041&group->el[j]);1042if(exclude)1043return exclude;1044}1045}1046return NULL;1047}10481049/*1050 * Loads the per-directory exclude list for the substring of base1051 * which has a char length of baselen.1052 */1053static voidprep_exclude(struct dir_struct *dir,const char*base,int baselen)1054{1055struct exclude_list_group *group;1056struct exclude_list *el;1057struct exclude_stack *stk = NULL;1058struct untracked_cache_dir *untracked;1059int current;10601061 group = &dir->exclude_list_group[EXC_DIRS];10621063/*1064 * Pop the exclude lists from the EXCL_DIRS exclude_list_group1065 * which originate from directories not in the prefix of the1066 * path being checked.1067 */1068while((stk = dir->exclude_stack) != NULL) {1069if(stk->baselen <= baselen &&1070!strncmp(dir->basebuf.buf, base, stk->baselen))1071break;1072 el = &group->el[dir->exclude_stack->exclude_ix];1073 dir->exclude_stack = stk->prev;1074 dir->exclude = NULL;1075free((char*)el->src);/* see strbuf_detach() below */1076clear_exclude_list(el);1077free(stk);1078 group->nr--;1079}10801081/* Skip traversing into sub directories if the parent is excluded */1082if(dir->exclude)1083return;10841085/*1086 * Lazy initialization. All call sites currently just1087 * memset(dir, 0, sizeof(*dir)) before use. Changing all of1088 * them seems lots of work for little benefit.1089 */1090if(!dir->basebuf.buf)1091strbuf_init(&dir->basebuf, PATH_MAX);10921093/* Read from the parent directories and push them down. */1094 current = stk ? stk->baselen : -1;1095strbuf_setlen(&dir->basebuf, current <0?0: current);1096if(dir->untracked)1097 untracked = stk ? stk->ucd : dir->untracked->root;1098else1099 untracked = NULL;11001101while(current < baselen) {1102const char*cp;1103struct sha1_stat sha1_stat;11041105 stk =xcalloc(1,sizeof(*stk));1106if(current <0) {1107 cp = base;1108 current =0;1109}else{1110 cp =strchr(base + current +1,'/');1111if(!cp)1112die("oops in prep_exclude");1113 cp++;1114 untracked =1115lookup_untracked(dir->untracked, untracked,1116 base + current,1117 cp - base - current);1118}1119 stk->prev = dir->exclude_stack;1120 stk->baselen = cp - base;1121 stk->exclude_ix = group->nr;1122 stk->ucd = untracked;1123 el =add_exclude_list(dir, EXC_DIRS, NULL);1124strbuf_add(&dir->basebuf, base + current, stk->baselen - current);1125assert(stk->baselen == dir->basebuf.len);11261127/* Abort if the directory is excluded */1128if(stk->baselen) {1129int dt = DT_DIR;1130 dir->basebuf.buf[stk->baselen -1] =0;1131 dir->exclude =last_exclude_matching_from_lists(dir,1132 dir->basebuf.buf, stk->baselen -1,1133 dir->basebuf.buf + current, &dt);1134 dir->basebuf.buf[stk->baselen -1] ='/';1135if(dir->exclude &&1136 dir->exclude->flags & EXC_FLAG_NEGATIVE)1137 dir->exclude = NULL;1138if(dir->exclude) {1139 dir->exclude_stack = stk;1140return;1141}1142}11431144/* Try to read per-directory file */1145hashclr(sha1_stat.sha1);1146 sha1_stat.valid =0;1147if(dir->exclude_per_dir &&1148/*1149 * If we know that no files have been added in1150 * this directory (i.e. valid_cached_dir() has1151 * been executed and set untracked->valid) ..1152 */1153(!untracked || !untracked->valid ||1154/*1155 * .. and .gitignore does not exist before1156 * (i.e. null exclude_sha1). Then we can skip1157 * loading .gitignore, which would result in1158 * ENOENT anyway.1159 */1160!is_null_sha1(untracked->exclude_sha1))) {1161/*1162 * dir->basebuf gets reused by the traversal, but we1163 * need fname to remain unchanged to ensure the src1164 * member of each struct exclude correctly1165 * back-references its source file. Other invocations1166 * of add_exclude_list provide stable strings, so we1167 * strbuf_detach() and free() here in the caller.1168 */1169struct strbuf sb = STRBUF_INIT;1170strbuf_addbuf(&sb, &dir->basebuf);1171strbuf_addstr(&sb, dir->exclude_per_dir);1172 el->src =strbuf_detach(&sb, NULL);1173add_excludes(el->src, el->src, stk->baselen, el,1,1174 untracked ? &sha1_stat : NULL);1175}1176/*1177 * NEEDSWORK: when untracked cache is enabled, prep_exclude()1178 * will first be called in valid_cached_dir() then maybe many1179 * times more in last_exclude_matching(). When the cache is1180 * used, last_exclude_matching() will not be called and1181 * reading .gitignore content will be a waste.1182 *1183 * So when it's called by valid_cached_dir() and we can get1184 * .gitignore SHA-1 from the index (i.e. .gitignore is not1185 * modified on work tree), we could delay reading the1186 * .gitignore content until we absolutely need it in1187 * last_exclude_matching(). Be careful about ignore rule1188 * order, though, if you do that.1189 */1190if(untracked &&1191hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {1192invalidate_gitignore(dir->untracked, untracked);1193hashcpy(untracked->exclude_sha1, sha1_stat.sha1);1194}1195 dir->exclude_stack = stk;1196 current = stk->baselen;1197}1198strbuf_setlen(&dir->basebuf, baselen);1199}12001201/*1202 * Loads the exclude lists for the directory containing pathname, then1203 * scans all exclude lists to determine whether pathname is excluded.1204 * Returns the exclude_list element which matched, or NULL for1205 * undecided.1206 */1207struct exclude *last_exclude_matching(struct dir_struct *dir,1208const char*pathname,1209int*dtype_p)1210{1211int pathlen =strlen(pathname);1212const char*basename =strrchr(pathname,'/');1213 basename = (basename) ? basename+1: pathname;12141215prep_exclude(dir, pathname, basename-pathname);12161217if(dir->exclude)1218return dir->exclude;12191220returnlast_exclude_matching_from_lists(dir, pathname, pathlen,1221 basename, dtype_p);1222}12231224/*1225 * Loads the exclude lists for the directory containing pathname, then1226 * scans all exclude lists to determine whether pathname is excluded.1227 * Returns 1 if true, otherwise 0.1228 */1229intis_excluded(struct dir_struct *dir,const char*pathname,int*dtype_p)1230{1231struct exclude *exclude =1232last_exclude_matching(dir, pathname, dtype_p);1233if(exclude)1234return exclude->flags & EXC_FLAG_NEGATIVE ?0:1;1235return0;1236}12371238static struct dir_entry *dir_entry_new(const char*pathname,int len)1239{1240struct dir_entry *ent;12411242 ent =xmalloc(sizeof(*ent) + len +1);1243 ent->len = len;1244memcpy(ent->name, pathname, len);1245 ent->name[len] =0;1246return ent;1247}12481249static struct dir_entry *dir_add_name(struct dir_struct *dir,const char*pathname,int len)1250{1251if(cache_file_exists(pathname, len, ignore_case))1252return NULL;12531254ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);1255return dir->entries[dir->nr++] =dir_entry_new(pathname, len);1256}12571258struct dir_entry *dir_add_ignored(struct dir_struct *dir,const char*pathname,int len)1259{1260if(!cache_name_is_other(pathname, len))1261return NULL;12621263ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);1264return dir->ignored[dir->ignored_nr++] =dir_entry_new(pathname, len);1265}12661267enum exist_status {1268 index_nonexistent =0,1269 index_directory,1270 index_gitdir1271};12721273/*1274 * Do not use the alphabetically sorted index to look up1275 * the directory name; instead, use the case insensitive1276 * directory hash.1277 */1278static enum exist_status directory_exists_in_index_icase(const char*dirname,int len)1279{1280struct cache_entry *ce;12811282if(cache_dir_exists(dirname, len))1283return index_directory;12841285 ce =cache_file_exists(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(const char*dirname,int len)1300{1301int pos;13021303if(ignore_case)1304returndirectory_exists_in_index_icase(dirname, len);13051306 pos =cache_name_pos(dirname, len);1307if(pos <0)1308 pos = -pos-1;1309while(pos < active_nr) {1310const struct cache_entry *ce = active_cache[pos++];1311unsigned char endchar;13121313if(strncmp(ce->name, dirname, len))1314break;1315 endchar = ce->name[len];1316if(endchar >'/')1317break;1318if(endchar =='/')1319return index_directory;1320if(!endchar &&S_ISGITLINK(ce->ce_mode))1321return index_gitdir;1322}1323return index_nonexistent;1324}13251326/*1327 * When we find a directory when traversing the filesystem, we1328 * have three distinct cases:1329 *1330 * - ignore it1331 * - see it as a directory1332 * - recurse into it1333 *1334 * and which one we choose depends on a combination of existing1335 * git index contents and the flags passed into the directory1336 * traversal routine.1337 *1338 * Case 1: If we *already* have entries in the index under that1339 * directory name, we always recurse into the directory to see1340 * all the files.1341 *1342 * Case 2: If we *already* have that directory name as a gitlink,1343 * we always continue to see it as a gitlink, regardless of whether1344 * there is an actual git directory there or not (it might not1345 * be checked out as a subproject!)1346 *1347 * Case 3: if we didn't have it in the index previously, we1348 * have a few sub-cases:1349 *1350 * (a) if "show_other_directories" is true, we show it as1351 * just a directory, unless "hide_empty_directories" is1352 * also true, in which case we need to check if it contains any1353 * untracked and / or ignored files.1354 * (b) if it looks like a git directory, and we don't have1355 * 'no_gitlinks' set we treat it as a gitlink, and show it1356 * as a directory.1357 * (c) otherwise, we recurse into it.1358 */1359static enum path_treatment treat_directory(struct dir_struct *dir,1360struct untracked_cache_dir *untracked,1361const char*dirname,int len,int baselen,int exclude,1362const struct path_simplify *simplify)1363{1364/* The "len-1" is to strip the final '/' */1365switch(directory_exists_in_index(dirname, len-1)) {1366case index_directory:1367return path_recurse;13681369case index_gitdir:1370return path_none;13711372case index_nonexistent:1373if(dir->flags & DIR_SHOW_OTHER_DIRECTORIES)1374break;1375if(!(dir->flags & DIR_NO_GITLINKS)) {1376unsigned char sha1[20];1377if(resolve_gitlink_ref(dirname,"HEAD", sha1) ==0)1378return path_untracked;1379}1380return path_recurse;1381}13821383/* This is the "show_other_directories" case */13841385if(!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))1386return exclude ? path_excluded : path_untracked;13871388 untracked =lookup_untracked(dir->untracked, untracked,1389 dirname + baselen, len - baselen);1390returnread_directory_recursive(dir, dirname, len,1391 untracked,1, simplify);1392}13931394/*1395 * This is an inexact early pruning of any recursive directory1396 * reading - if the path cannot possibly be in the pathspec,1397 * return true, and we'll skip it early.1398 */1399static intsimplify_away(const char*path,int pathlen,const struct path_simplify *simplify)1400{1401if(simplify) {1402for(;;) {1403const char*match = simplify->path;1404int len = simplify->len;14051406if(!match)1407break;1408if(len > pathlen)1409 len = pathlen;1410if(!memcmp(path, match, len))1411return0;1412 simplify++;1413}1414return1;1415}1416return0;1417}14181419/*1420 * This function tells us whether an excluded path matches a1421 * list of "interesting" pathspecs. That is, whether a path matched1422 * by any of the pathspecs could possibly be ignored by excluding1423 * the specified path. This can happen if:1424 *1425 * 1. the path is mentioned explicitly in the pathspec1426 *1427 * 2. the path is a directory prefix of some element in the1428 * pathspec1429 */1430static intexclude_matches_pathspec(const char*path,int len,1431const struct path_simplify *simplify)1432{1433if(simplify) {1434for(; simplify->path; simplify++) {1435if(len == simplify->len1436&& !memcmp(path, simplify->path, len))1437return1;1438if(len < simplify->len1439&& simplify->path[len] =='/'1440&& !memcmp(path, simplify->path, len))1441return1;1442}1443}1444return0;1445}14461447static intget_index_dtype(const char*path,int len)1448{1449int pos;1450const struct cache_entry *ce;14511452 ce =cache_file_exists(path, len,0);1453if(ce) {1454if(!ce_uptodate(ce))1455return DT_UNKNOWN;1456if(S_ISGITLINK(ce->ce_mode))1457return DT_DIR;1458/*1459 * Nobody actually cares about the1460 * difference between DT_LNK and DT_REG1461 */1462return DT_REG;1463}14641465/* Try to look it up as a directory */1466 pos =cache_name_pos(path, len);1467if(pos >=0)1468return DT_UNKNOWN;1469 pos = -pos-1;1470while(pos < active_nr) {1471 ce = active_cache[pos++];1472if(strncmp(ce->name, path, len))1473break;1474if(ce->name[len] >'/')1475break;1476if(ce->name[len] <'/')1477continue;1478if(!ce_uptodate(ce))1479break;/* continue? */1480return DT_DIR;1481}1482return DT_UNKNOWN;1483}14841485static intget_dtype(struct dirent *de,const char*path,int len)1486{1487int dtype = de ?DTYPE(de) : DT_UNKNOWN;1488struct stat st;14891490if(dtype != DT_UNKNOWN)1491return dtype;1492 dtype =get_index_dtype(path, len);1493if(dtype != DT_UNKNOWN)1494return dtype;1495if(lstat(path, &st))1496return dtype;1497if(S_ISREG(st.st_mode))1498return DT_REG;1499if(S_ISDIR(st.st_mode))1500return DT_DIR;1501if(S_ISLNK(st.st_mode))1502return DT_LNK;1503return dtype;1504}15051506static enum path_treatment treat_one_path(struct dir_struct *dir,1507struct untracked_cache_dir *untracked,1508struct strbuf *path,1509int baselen,1510const struct path_simplify *simplify,1511int dtype,struct dirent *de)1512{1513int exclude;1514int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);15151516if(dtype == DT_UNKNOWN)1517 dtype =get_dtype(de, path->buf, path->len);15181519/* Always exclude indexed files */1520if(dtype != DT_DIR && has_path_in_index)1521return path_none;15221523/*1524 * When we are looking at a directory P in the working tree,1525 * there are three cases:1526 *1527 * (1) P exists in the index. Everything inside the directory P in1528 * the working tree needs to go when P is checked out from the1529 * index.1530 *1531 * (2) P does not exist in the index, but there is P/Q in the index.1532 * We know P will stay a directory when we check out the contents1533 * of the index, but we do not know yet if there is a directory1534 * P/Q in the working tree to be killed, so we need to recurse.1535 *1536 * (3) P does not exist in the index, and there is no P/Q in the index1537 * to require P to be a directory, either. Only in this case, we1538 * know that everything inside P will not be killed without1539 * recursing.1540 */1541if((dir->flags & DIR_COLLECT_KILLED_ONLY) &&1542(dtype == DT_DIR) &&1543!has_path_in_index &&1544(directory_exists_in_index(path->buf, path->len) == index_nonexistent))1545return path_none;15461547 exclude =is_excluded(dir, path->buf, &dtype);15481549/*1550 * Excluded? If we don't explicitly want to show1551 * ignored files, ignore it1552 */1553if(exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))1554return path_excluded;15551556switch(dtype) {1557default:1558return path_none;1559case DT_DIR:1560strbuf_addch(path,'/');1561returntreat_directory(dir, untracked, path->buf, path->len,1562 baselen, exclude, simplify);1563case DT_REG:1564case DT_LNK:1565return exclude ? path_excluded : path_untracked;1566}1567}15681569static enum path_treatment treat_path_fast(struct dir_struct *dir,1570struct untracked_cache_dir *untracked,1571struct cached_dir *cdir,1572struct strbuf *path,1573int baselen,1574const struct path_simplify *simplify)1575{1576strbuf_setlen(path, baselen);1577if(!cdir->ucd) {1578strbuf_addstr(path, cdir->file);1579return path_untracked;1580}1581strbuf_addstr(path, cdir->ucd->name);1582/* treat_one_path() does this before it calls treat_directory() */1583strbuf_complete(path,'/');1584if(cdir->ucd->check_only)1585/*1586 * check_only is set as a result of treat_directory() getting1587 * to its bottom. Verify again the same set of directories1588 * with check_only set.1589 */1590returnread_directory_recursive(dir, path->buf, path->len,1591 cdir->ucd,1, simplify);1592/*1593 * We get path_recurse in the first run when1594 * directory_exists_in_index() returns index_nonexistent. We1595 * are sure that new changes in the index does not impact the1596 * outcome. Return now.1597 */1598return path_recurse;1599}16001601static enum path_treatment treat_path(struct dir_struct *dir,1602struct untracked_cache_dir *untracked,1603struct cached_dir *cdir,1604struct strbuf *path,1605int baselen,1606const struct path_simplify *simplify)1607{1608int dtype;1609struct dirent *de = cdir->de;16101611if(!de)1612returntreat_path_fast(dir, untracked, cdir, path,1613 baselen, simplify);1614if(is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name,".git"))1615return path_none;1616strbuf_setlen(path, baselen);1617strbuf_addstr(path, de->d_name);1618if(simplify_away(path->buf, path->len, simplify))1619return path_none;16201621 dtype =DTYPE(de);1622returntreat_one_path(dir, untracked, path, baselen, simplify, dtype, de);1623}16241625static voidadd_untracked(struct untracked_cache_dir *dir,const char*name)1626{1627if(!dir)1628return;1629ALLOC_GROW(dir->untracked, dir->untracked_nr +1,1630 dir->untracked_alloc);1631 dir->untracked[dir->untracked_nr++] =xstrdup(name);1632}16331634static intvalid_cached_dir(struct dir_struct *dir,1635struct untracked_cache_dir *untracked,1636struct strbuf *path,1637int check_only)1638{1639struct stat st;16401641if(!untracked)1642return0;16431644if(stat(path->len ? path->buf :".", &st)) {1645invalidate_directory(dir->untracked, untracked);1646memset(&untracked->stat_data,0,sizeof(untracked->stat_data));1647return0;1648}1649if(!untracked->valid ||1650match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {1651if(untracked->valid)1652invalidate_directory(dir->untracked, untracked);1653fill_stat_data(&untracked->stat_data, &st);1654return0;1655}16561657if(untracked->check_only != !!check_only) {1658invalidate_directory(dir->untracked, untracked);1659return0;1660}16611662/*1663 * prep_exclude will be called eventually on this directory,1664 * but it's called much later in last_exclude_matching(). We1665 * need it now to determine the validity of the cache for this1666 * path. The next calls will be nearly no-op, the way1667 * prep_exclude() is designed.1668 */1669if(path->len && path->buf[path->len -1] !='/') {1670strbuf_addch(path,'/');1671prep_exclude(dir, path->buf, path->len);1672strbuf_setlen(path, path->len -1);1673}else1674prep_exclude(dir, path->buf, path->len);16751676/* hopefully prep_exclude() haven't invalidated this entry... */1677return untracked->valid;1678}16791680static intopen_cached_dir(struct cached_dir *cdir,1681struct dir_struct *dir,1682struct untracked_cache_dir *untracked,1683struct strbuf *path,1684int check_only)1685{1686memset(cdir,0,sizeof(*cdir));1687 cdir->untracked = untracked;1688if(valid_cached_dir(dir, untracked, path, check_only))1689return0;1690 cdir->fdir =opendir(path->len ? path->buf :".");1691if(dir->untracked)1692 dir->untracked->dir_opened++;1693if(!cdir->fdir)1694return-1;1695return0;1696}16971698static intread_cached_dir(struct cached_dir *cdir)1699{1700if(cdir->fdir) {1701 cdir->de =readdir(cdir->fdir);1702if(!cdir->de)1703return-1;1704return0;1705}1706while(cdir->nr_dirs < cdir->untracked->dirs_nr) {1707struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];1708if(!d->recurse) {1709 cdir->nr_dirs++;1710continue;1711}1712 cdir->ucd = d;1713 cdir->nr_dirs++;1714return0;1715}1716 cdir->ucd = NULL;1717if(cdir->nr_files < cdir->untracked->untracked_nr) {1718struct untracked_cache_dir *d = cdir->untracked;1719 cdir->file = d->untracked[cdir->nr_files++];1720return0;1721}1722return-1;1723}17241725static voidclose_cached_dir(struct cached_dir *cdir)1726{1727if(cdir->fdir)1728closedir(cdir->fdir);1729/*1730 * We have gone through this directory and found no untracked1731 * entries. Mark it valid.1732 */1733if(cdir->untracked) {1734 cdir->untracked->valid =1;1735 cdir->untracked->recurse =1;1736}1737}17381739/*1740 * Read a directory tree. We currently ignore anything but1741 * directories, regular files and symlinks. That's because git1742 * doesn't handle them at all yet. Maybe that will change some1743 * day.1744 *1745 * Also, we ignore the name ".git" (even if it is not a directory).1746 * That likely will not change.1747 *1748 * Returns the most significant path_treatment value encountered in the scan.1749 */1750static enum path_treatment read_directory_recursive(struct dir_struct *dir,1751const char*base,int baselen,1752struct untracked_cache_dir *untracked,int check_only,1753const struct path_simplify *simplify)1754{1755struct cached_dir cdir;1756enum path_treatment state, subdir_state, dir_state = path_none;1757struct strbuf path = STRBUF_INIT;17581759strbuf_add(&path, base, baselen);17601761if(open_cached_dir(&cdir, dir, untracked, &path, check_only))1762goto out;17631764if(untracked)1765 untracked->check_only = !!check_only;17661767while(!read_cached_dir(&cdir)) {1768/* check how the file or directory should be treated */1769 state =treat_path(dir, untracked, &cdir, &path, baselen, simplify);17701771if(state > dir_state)1772 dir_state = state;17731774/* recurse into subdir if instructed by treat_path */1775if(state == path_recurse) {1776struct untracked_cache_dir *ud;1777 ud =lookup_untracked(dir->untracked, untracked,1778 path.buf + baselen,1779 path.len - baselen);1780 subdir_state =1781read_directory_recursive(dir, path.buf, path.len,1782 ud, check_only, simplify);1783if(subdir_state > dir_state)1784 dir_state = subdir_state;1785}17861787if(check_only) {1788/* abort early if maximum state has been reached */1789if(dir_state == path_untracked) {1790if(cdir.fdir)1791add_untracked(untracked, path.buf + baselen);1792break;1793}1794/* skip the dir_add_* part */1795continue;1796}17971798/* add the path to the appropriate result list */1799switch(state) {1800case path_excluded:1801if(dir->flags & DIR_SHOW_IGNORED)1802dir_add_name(dir, path.buf, path.len);1803else if((dir->flags & DIR_SHOW_IGNORED_TOO) ||1804((dir->flags & DIR_COLLECT_IGNORED) &&1805exclude_matches_pathspec(path.buf, path.len,1806 simplify)))1807dir_add_ignored(dir, path.buf, path.len);1808break;18091810case path_untracked:1811if(dir->flags & DIR_SHOW_IGNORED)1812break;1813dir_add_name(dir, path.buf, path.len);1814if(cdir.fdir)1815add_untracked(untracked, path.buf + baselen);1816break;18171818default:1819break;1820}1821}1822close_cached_dir(&cdir);1823 out:1824strbuf_release(&path);18251826return dir_state;1827}18281829static intcmp_name(const void*p1,const void*p2)1830{1831const struct dir_entry *e1 = *(const struct dir_entry **)p1;1832const struct dir_entry *e2 = *(const struct dir_entry **)p2;18331834returnname_compare(e1->name, e1->len, e2->name, e2->len);1835}18361837static struct path_simplify *create_simplify(const char**pathspec)1838{1839int nr, alloc =0;1840struct path_simplify *simplify = NULL;18411842if(!pathspec)1843return NULL;18441845for(nr =0; ; nr++) {1846const char*match;1847ALLOC_GROW(simplify, nr +1, alloc);1848 match = *pathspec++;1849if(!match)1850break;1851 simplify[nr].path = match;1852 simplify[nr].len =simple_length(match);1853}1854 simplify[nr].path = NULL;1855 simplify[nr].len =0;1856return simplify;1857}18581859static voidfree_simplify(struct path_simplify *simplify)1860{1861free(simplify);1862}18631864static inttreat_leading_path(struct dir_struct *dir,1865const char*path,int len,1866const struct path_simplify *simplify)1867{1868struct strbuf sb = STRBUF_INIT;1869int baselen, rc =0;1870const char*cp;1871int old_flags = dir->flags;18721873while(len && path[len -1] =='/')1874 len--;1875if(!len)1876return1;1877 baselen =0;1878 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;1879while(1) {1880 cp = path + baselen + !!baselen;1881 cp =memchr(cp,'/', path + len - cp);1882if(!cp)1883 baselen = len;1884else1885 baselen = cp - path;1886strbuf_setlen(&sb,0);1887strbuf_add(&sb, path, baselen);1888if(!is_directory(sb.buf))1889break;1890if(simplify_away(sb.buf, sb.len, simplify))1891break;1892if(treat_one_path(dir, NULL, &sb, baselen, simplify,1893 DT_DIR, NULL) == path_none)1894break;/* do not recurse into it */1895if(len <= baselen) {1896 rc =1;1897break;/* finished checking */1898}1899}1900strbuf_release(&sb);1901 dir->flags = old_flags;1902return rc;1903}19041905static const char*get_ident_string(void)1906{1907static struct strbuf sb = STRBUF_INIT;1908struct utsname uts;19091910if(sb.len)1911return sb.buf;1912if(uname(&uts) <0)1913die_errno(_("failed to get kernel name and information"));1914strbuf_addf(&sb,"Location%s, system%s %s %s",get_git_work_tree(),1915 uts.sysname, uts.release, uts.version);1916return sb.buf;1917}19181919static intident_in_untracked(const struct untracked_cache *uc)1920{1921const char*end = uc->ident.buf + uc->ident.len;1922const char*p = uc->ident.buf;19231924for(p = uc->ident.buf; p < end; p +=strlen(p) +1)1925if(!strcmp(p,get_ident_string()))1926return1;1927return0;1928}19291930voidadd_untracked_ident(struct untracked_cache *uc)1931{1932if(ident_in_untracked(uc))1933return;1934strbuf_addstr(&uc->ident,get_ident_string());1935/* this strbuf contains a list of strings, save NUL too */1936strbuf_addch(&uc->ident,0);1937}19381939static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,1940int base_len,1941const struct pathspec *pathspec)1942{1943struct untracked_cache_dir *root;19441945if(!dir->untracked ||getenv("GIT_DISABLE_UNTRACKED_CACHE"))1946return NULL;19471948/*1949 * We only support $GIT_DIR/info/exclude and core.excludesfile1950 * as the global ignore rule files. Any other additions1951 * (e.g. from command line) invalidate the cache. This1952 * condition also catches running setup_standard_excludes()1953 * before setting dir->untracked!1954 */1955if(dir->unmanaged_exclude_files)1956return NULL;19571958/*1959 * Optimize for the main use case only: whole-tree git1960 * status. More work involved in treat_leading_path() if we1961 * use cache on just a subset of the worktree. pathspec1962 * support could make the matter even worse.1963 */1964if(base_len || (pathspec && pathspec->nr))1965return NULL;19661967/* Different set of flags may produce different results */1968if(dir->flags != dir->untracked->dir_flags ||1969/*1970 * See treat_directory(), case index_nonexistent. Without1971 * this flag, we may need to also cache .git file content1972 * for the resolve_gitlink_ref() call, which we don't.1973 */1974!(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||1975/* We don't support collecting ignore files */1976(dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |1977 DIR_COLLECT_IGNORED)))1978return NULL;19791980/*1981 * If we use .gitignore in the cache and now you change it to1982 * .gitexclude, everything will go wrong.1983 */1984if(dir->exclude_per_dir != dir->untracked->exclude_per_dir &&1985strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))1986return NULL;19871988/*1989 * EXC_CMDL is not considered in the cache. If people set it,1990 * skip the cache.1991 */1992if(dir->exclude_list_group[EXC_CMDL].nr)1993return NULL;19941995if(!ident_in_untracked(dir->untracked)) {1996warning(_("Untracked cache is disabled on this system."));1997return NULL;1998}19992000if(!dir->untracked->root) {2001const int len =sizeof(*dir->untracked->root);2002 dir->untracked->root =xmalloc(len);2003memset(dir->untracked->root,0, len);2004}20052006/* Validate $GIT_DIR/info/exclude and core.excludesfile */2007 root = dir->untracked->root;2008if(hashcmp(dir->ss_info_exclude.sha1,2009 dir->untracked->ss_info_exclude.sha1)) {2010invalidate_gitignore(dir->untracked, root);2011 dir->untracked->ss_info_exclude = dir->ss_info_exclude;2012}2013if(hashcmp(dir->ss_excludes_file.sha1,2014 dir->untracked->ss_excludes_file.sha1)) {2015invalidate_gitignore(dir->untracked, root);2016 dir->untracked->ss_excludes_file = dir->ss_excludes_file;2017}20182019/* Make sure this directory is not dropped out at saving phase */2020 root->recurse =1;2021return root;2022}20232024intread_directory(struct dir_struct *dir,const char*path,int len,const struct pathspec *pathspec)2025{2026struct path_simplify *simplify;2027struct untracked_cache_dir *untracked;20282029/*2030 * Check out create_simplify()2031 */2032if(pathspec)2033GUARD_PATHSPEC(pathspec,2034 PATHSPEC_FROMTOP |2035 PATHSPEC_MAXDEPTH |2036 PATHSPEC_LITERAL |2037 PATHSPEC_GLOB |2038 PATHSPEC_ICASE |2039 PATHSPEC_EXCLUDE);20402041if(has_symlink_leading_path(path, len))2042return dir->nr;20432044/*2045 * exclude patterns are treated like positive ones in2046 * create_simplify. Usually exclude patterns should be a2047 * subset of positive ones, which has no impacts on2048 * create_simplify().2049 */2050 simplify =create_simplify(pathspec ? pathspec->_raw : NULL);2051 untracked =validate_untracked_cache(dir, len, pathspec);2052if(!untracked)2053/*2054 * make sure untracked cache code path is disabled,2055 * e.g. prep_exclude()2056 */2057 dir->untracked = NULL;2058if(!len ||treat_leading_path(dir, path, len, simplify))2059read_directory_recursive(dir, path, len, untracked,0, simplify);2060free_simplify(simplify);2061qsort(dir->entries, dir->nr,sizeof(struct dir_entry *), cmp_name);2062qsort(dir->ignored, dir->ignored_nr,sizeof(struct dir_entry *), cmp_name);2063if(dir->untracked) {2064static struct trace_key trace_untracked_stats =TRACE_KEY_INIT(UNTRACKED_STATS);2065trace_printf_key(&trace_untracked_stats,2066"node creation:%u\n"2067"gitignore invalidation:%u\n"2068"directory invalidation:%u\n"2069"opendir:%u\n",2070 dir->untracked->dir_created,2071 dir->untracked->gitignore_invalidated,2072 dir->untracked->dir_invalidated,2073 dir->untracked->dir_opened);2074if(dir->untracked == the_index.untracked &&2075(dir->untracked->dir_opened ||2076 dir->untracked->gitignore_invalidated ||2077 dir->untracked->dir_invalidated))2078 the_index.cache_changed |= UNTRACKED_CHANGED;2079if(dir->untracked != the_index.untracked) {2080free(dir->untracked);2081 dir->untracked = NULL;2082}2083}2084return dir->nr;2085}20862087intfile_exists(const char*f)2088{2089struct stat sb;2090returnlstat(f, &sb) ==0;2091}20922093static intcmp_icase(char a,char b)2094{2095if(a == b)2096return0;2097if(ignore_case)2098returntoupper(a) -toupper(b);2099return a - b;2100}21012102/*2103 * Given two normalized paths (a trailing slash is ok), if subdir is2104 * outside dir, return -1. Otherwise return the offset in subdir that2105 * can be used as relative path to dir.2106 */2107intdir_inside_of(const char*subdir,const char*dir)2108{2109int offset =0;21102111assert(dir && subdir && *dir && *subdir);21122113while(*dir && *subdir && !cmp_icase(*dir, *subdir)) {2114 dir++;2115 subdir++;2116 offset++;2117}21182119/* hel[p]/me vs hel[l]/yeah */2120if(*dir && *subdir)2121return-1;21222123if(!*subdir)2124return!*dir ? offset : -1;/* same dir */21252126/* foo/[b]ar vs foo/[] */2127if(is_dir_sep(dir[-1]))2128returnis_dir_sep(subdir[-1]) ? offset : -1;21292130/* foo[/]bar vs foo[] */2131returnis_dir_sep(*subdir) ? offset +1: -1;2132}21332134intis_inside_dir(const char*dir)2135{2136char*cwd;2137int rc;21382139if(!dir)2140return0;21412142 cwd =xgetcwd();2143 rc = (dir_inside_of(cwd, dir) >=0);2144free(cwd);2145return rc;2146}21472148intis_empty_dir(const char*path)2149{2150DIR*dir =opendir(path);2151struct dirent *e;2152int ret =1;21532154if(!dir)2155return0;21562157while((e =readdir(dir)) != NULL)2158if(!is_dot_or_dotdot(e->d_name)) {2159 ret =0;2160break;2161}21622163closedir(dir);2164return ret;2165}21662167static intremove_dir_recurse(struct strbuf *path,int flag,int*kept_up)2168{2169DIR*dir;2170struct dirent *e;2171int ret =0, original_len = path->len, len, kept_down =0;2172int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);2173int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);2174unsigned char submodule_head[20];21752176if((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&2177!resolve_gitlink_ref(path->buf,"HEAD", submodule_head)) {2178/* Do not descend and nuke a nested git work tree. */2179if(kept_up)2180*kept_up =1;2181return0;2182}21832184 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;2185 dir =opendir(path->buf);2186if(!dir) {2187if(errno == ENOENT)2188return keep_toplevel ? -1:0;2189else if(errno == EACCES && !keep_toplevel)2190/*2191 * An empty dir could be removable even if it2192 * is unreadable:2193 */2194returnrmdir(path->buf);2195else2196return-1;2197}2198strbuf_complete(path,'/');21992200 len = path->len;2201while((e =readdir(dir)) != NULL) {2202struct stat st;2203if(is_dot_or_dotdot(e->d_name))2204continue;22052206strbuf_setlen(path, len);2207strbuf_addstr(path, e->d_name);2208if(lstat(path->buf, &st)) {2209if(errno == ENOENT)2210/*2211 * file disappeared, which is what we2212 * wanted anyway2213 */2214continue;2215/* fall thru */2216}else if(S_ISDIR(st.st_mode)) {2217if(!remove_dir_recurse(path, flag, &kept_down))2218continue;/* happy */2219}else if(!only_empty &&2220(!unlink(path->buf) || errno == ENOENT)) {2221continue;/* happy, too */2222}22232224/* path too long, stat fails, or non-directory still exists */2225 ret = -1;2226break;2227}2228closedir(dir);22292230strbuf_setlen(path, original_len);2231if(!ret && !keep_toplevel && !kept_down)2232 ret = (!rmdir(path->buf) || errno == ENOENT) ?0: -1;2233else if(kept_up)2234/*2235 * report the uplevel that it is not an error that we2236 * did not rmdir() our directory.2237 */2238*kept_up = !ret;2239return ret;2240}22412242intremove_dir_recursively(struct strbuf *path,int flag)2243{2244returnremove_dir_recurse(path, flag, NULL);2245}22462247staticGIT_PATH_FUNC(git_path_info_exclude,"info/exclude")22482249voidsetup_standard_excludes(struct dir_struct *dir)2250{2251const char*path;22522253 dir->exclude_per_dir =".gitignore";22542255/* core.excludefile defaulting to $XDG_HOME/git/ignore */2256if(!excludes_file)2257 excludes_file =xdg_config_home("ignore");2258if(excludes_file && !access_or_warn(excludes_file, R_OK,0))2259add_excludes_from_file_1(dir, excludes_file,2260 dir->untracked ? &dir->ss_excludes_file : NULL);22612262/* per repository user preference */2263 path =git_path_info_exclude();2264if(!access_or_warn(path, R_OK,0))2265add_excludes_from_file_1(dir, path,2266 dir->untracked ? &dir->ss_info_exclude : NULL);2267}22682269intremove_path(const char*name)2270{2271char*slash;22722273if(unlink(name) && errno != ENOENT && errno != ENOTDIR)2274return-1;22752276 slash =strrchr(name,'/');2277if(slash) {2278char*dirs =xstrdup(name);2279 slash = dirs + (slash - name);2280do{2281*slash ='\0';2282}while(rmdir(dirs) ==0&& (slash =strrchr(dirs,'/')));2283free(dirs);2284}2285return0;2286}22872288/*2289 * Frees memory within dir which was allocated for exclude lists and2290 * the exclude_stack. Does not free dir itself.2291 */2292voidclear_directory(struct dir_struct *dir)2293{2294int i, j;2295struct exclude_list_group *group;2296struct exclude_list *el;2297struct exclude_stack *stk;22982299for(i = EXC_CMDL; i <= EXC_FILE; i++) {2300 group = &dir->exclude_list_group[i];2301for(j =0; j < group->nr; j++) {2302 el = &group->el[j];2303if(i == EXC_DIRS)2304free((char*)el->src);2305clear_exclude_list(el);2306}2307free(group->el);2308}23092310 stk = dir->exclude_stack;2311while(stk) {2312struct exclude_stack *prev = stk->prev;2313free(stk);2314 stk = prev;2315}2316strbuf_release(&dir->basebuf);2317}23182319struct ondisk_untracked_cache {2320struct stat_data info_exclude_stat;2321struct stat_data excludes_file_stat;2322uint32_t dir_flags;2323unsigned char info_exclude_sha1[20];2324unsigned char excludes_file_sha1[20];2325char exclude_per_dir[FLEX_ARRAY];2326};23272328#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)23292330struct write_data {2331int index;/* number of written untracked_cache_dir */2332struct ewah_bitmap *check_only;/* from untracked_cache_dir */2333struct ewah_bitmap *valid;/* from untracked_cache_dir */2334struct ewah_bitmap *sha1_valid;/* set if exclude_sha1 is not null */2335struct strbuf out;2336struct strbuf sb_stat;2337struct strbuf sb_sha1;2338};23392340static voidstat_data_to_disk(struct stat_data *to,const struct stat_data *from)2341{2342 to->sd_ctime.sec =htonl(from->sd_ctime.sec);2343 to->sd_ctime.nsec =htonl(from->sd_ctime.nsec);2344 to->sd_mtime.sec =htonl(from->sd_mtime.sec);2345 to->sd_mtime.nsec =htonl(from->sd_mtime.nsec);2346 to->sd_dev =htonl(from->sd_dev);2347 to->sd_ino =htonl(from->sd_ino);2348 to->sd_uid =htonl(from->sd_uid);2349 to->sd_gid =htonl(from->sd_gid);2350 to->sd_size =htonl(from->sd_size);2351}23522353static voidwrite_one_dir(struct untracked_cache_dir *untracked,2354struct write_data *wd)2355{2356struct stat_data stat_data;2357struct strbuf *out = &wd->out;2358unsigned char intbuf[16];2359unsigned int intlen, value;2360int i = wd->index++;23612362/*2363 * untracked_nr should be reset whenever valid is clear, but2364 * for safety..2365 */2366if(!untracked->valid) {2367 untracked->untracked_nr =0;2368 untracked->check_only =0;2369}23702371if(untracked->check_only)2372ewah_set(wd->check_only, i);2373if(untracked->valid) {2374ewah_set(wd->valid, i);2375stat_data_to_disk(&stat_data, &untracked->stat_data);2376strbuf_add(&wd->sb_stat, &stat_data,sizeof(stat_data));2377}2378if(!is_null_sha1(untracked->exclude_sha1)) {2379ewah_set(wd->sha1_valid, i);2380strbuf_add(&wd->sb_sha1, untracked->exclude_sha1,20);2381}23822383 intlen =encode_varint(untracked->untracked_nr, intbuf);2384strbuf_add(out, intbuf, intlen);23852386/* skip non-recurse directories */2387for(i =0, value =0; i < untracked->dirs_nr; i++)2388if(untracked->dirs[i]->recurse)2389 value++;2390 intlen =encode_varint(value, intbuf);2391strbuf_add(out, intbuf, intlen);23922393strbuf_add(out, untracked->name,strlen(untracked->name) +1);23942395for(i =0; i < untracked->untracked_nr; i++)2396strbuf_add(out, untracked->untracked[i],2397strlen(untracked->untracked[i]) +1);23982399for(i =0; i < untracked->dirs_nr; i++)2400if(untracked->dirs[i]->recurse)2401write_one_dir(untracked->dirs[i], wd);2402}24032404voidwrite_untracked_extension(struct strbuf *out,struct untracked_cache *untracked)2405{2406struct ondisk_untracked_cache *ouc;2407struct write_data wd;2408unsigned char varbuf[16];2409int len =0, varint_len;2410if(untracked->exclude_per_dir)2411 len =strlen(untracked->exclude_per_dir);2412 ouc =xmalloc(sizeof(*ouc) + len +1);2413stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);2414stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);2415hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);2416hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);2417 ouc->dir_flags =htonl(untracked->dir_flags);2418memcpy(ouc->exclude_per_dir, untracked->exclude_per_dir, len +1);24192420 varint_len =encode_varint(untracked->ident.len, varbuf);2421strbuf_add(out, varbuf, varint_len);2422strbuf_add(out, untracked->ident.buf, untracked->ident.len);24232424strbuf_add(out, ouc,ouc_size(len));2425free(ouc);2426 ouc = NULL;24272428if(!untracked->root) {2429 varint_len =encode_varint(0, varbuf);2430strbuf_add(out, varbuf, varint_len);2431return;2432}24332434 wd.index =0;2435 wd.check_only =ewah_new();2436 wd.valid =ewah_new();2437 wd.sha1_valid =ewah_new();2438strbuf_init(&wd.out,1024);2439strbuf_init(&wd.sb_stat,1024);2440strbuf_init(&wd.sb_sha1,1024);2441write_one_dir(untracked->root, &wd);24422443 varint_len =encode_varint(wd.index, varbuf);2444strbuf_add(out, varbuf, varint_len);2445strbuf_addbuf(out, &wd.out);2446ewah_serialize_strbuf(wd.valid, out);2447ewah_serialize_strbuf(wd.check_only, out);2448ewah_serialize_strbuf(wd.sha1_valid, out);2449strbuf_addbuf(out, &wd.sb_stat);2450strbuf_addbuf(out, &wd.sb_sha1);2451strbuf_addch(out,'\0');/* safe guard for string lists */24522453ewah_free(wd.valid);2454ewah_free(wd.check_only);2455ewah_free(wd.sha1_valid);2456strbuf_release(&wd.out);2457strbuf_release(&wd.sb_stat);2458strbuf_release(&wd.sb_sha1);2459}24602461static voidfree_untracked(struct untracked_cache_dir *ucd)2462{2463int i;2464if(!ucd)2465return;2466for(i =0; i < ucd->dirs_nr; i++)2467free_untracked(ucd->dirs[i]);2468for(i =0; i < ucd->untracked_nr; i++)2469free(ucd->untracked[i]);2470free(ucd->untracked);2471free(ucd->dirs);2472free(ucd);2473}24742475voidfree_untracked_cache(struct untracked_cache *uc)2476{2477if(uc)2478free_untracked(uc->root);2479free(uc);2480}24812482struct read_data {2483int index;2484struct untracked_cache_dir **ucd;2485struct ewah_bitmap *check_only;2486struct ewah_bitmap *valid;2487struct ewah_bitmap *sha1_valid;2488const unsigned char*data;2489const unsigned char*end;2490};24912492static voidstat_data_from_disk(struct stat_data *to,const struct stat_data *from)2493{2494 to->sd_ctime.sec =get_be32(&from->sd_ctime.sec);2495 to->sd_ctime.nsec =get_be32(&from->sd_ctime.nsec);2496 to->sd_mtime.sec =get_be32(&from->sd_mtime.sec);2497 to->sd_mtime.nsec =get_be32(&from->sd_mtime.nsec);2498 to->sd_dev =get_be32(&from->sd_dev);2499 to->sd_ino =get_be32(&from->sd_ino);2500 to->sd_uid =get_be32(&from->sd_uid);2501 to->sd_gid =get_be32(&from->sd_gid);2502 to->sd_size =get_be32(&from->sd_size);2503}25042505static intread_one_dir(struct untracked_cache_dir **untracked_,2506struct read_data *rd)2507{2508struct untracked_cache_dir ud, *untracked;2509const unsigned char*next, *data = rd->data, *end = rd->end;2510unsigned int value;2511int i, len;25122513memset(&ud,0,sizeof(ud));25142515 next = data;2516 value =decode_varint(&next);2517if(next > end)2518return-1;2519 ud.recurse =1;2520 ud.untracked_alloc = value;2521 ud.untracked_nr = value;2522if(ud.untracked_nr)2523 ud.untracked =xmalloc(sizeof(*ud.untracked) * ud.untracked_nr);2524 data = next;25252526 next = data;2527 ud.dirs_alloc = ud.dirs_nr =decode_varint(&next);2528if(next > end)2529return-1;2530 ud.dirs =xmalloc(sizeof(*ud.dirs) * ud.dirs_nr);2531 data = next;25322533 len =strlen((const char*)data);2534 next = data + len +1;2535if(next > rd->end)2536return-1;2537*untracked_ = untracked =xmalloc(sizeof(*untracked) + len);2538memcpy(untracked, &ud,sizeof(ud));2539memcpy(untracked->name, data, len +1);2540 data = next;25412542for(i =0; i < untracked->untracked_nr; i++) {2543 len =strlen((const char*)data);2544 next = data + len +1;2545if(next > rd->end)2546return-1;2547 untracked->untracked[i] =xstrdup((const char*)data);2548 data = next;2549}25502551 rd->ucd[rd->index++] = untracked;2552 rd->data = data;25532554for(i =0; i < untracked->dirs_nr; i++) {2555 len =read_one_dir(untracked->dirs + i, rd);2556if(len <0)2557return-1;2558}2559return0;2560}25612562static voidset_check_only(size_t pos,void*cb)2563{2564struct read_data *rd = cb;2565struct untracked_cache_dir *ud = rd->ucd[pos];2566 ud->check_only =1;2567}25682569static voidread_stat(size_t pos,void*cb)2570{2571struct read_data *rd = cb;2572struct untracked_cache_dir *ud = rd->ucd[pos];2573if(rd->data +sizeof(struct stat_data) > rd->end) {2574 rd->data = rd->end +1;2575return;2576}2577stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);2578 rd->data +=sizeof(struct stat_data);2579 ud->valid =1;2580}25812582static voidread_sha1(size_t pos,void*cb)2583{2584struct read_data *rd = cb;2585struct untracked_cache_dir *ud = rd->ucd[pos];2586if(rd->data +20> rd->end) {2587 rd->data = rd->end +1;2588return;2589}2590hashcpy(ud->exclude_sha1, rd->data);2591 rd->data +=20;2592}25932594static voidload_sha1_stat(struct sha1_stat *sha1_stat,2595const struct stat_data *stat,2596const unsigned char*sha1)2597{2598stat_data_from_disk(&sha1_stat->stat, stat);2599hashcpy(sha1_stat->sha1, sha1);2600 sha1_stat->valid =1;2601}26022603struct untracked_cache *read_untracked_extension(const void*data,unsigned long sz)2604{2605const struct ondisk_untracked_cache *ouc;2606struct untracked_cache *uc;2607struct read_data rd;2608const unsigned char*next = data, *end = (const unsigned char*)data + sz;2609const char*ident;2610int ident_len, len;26112612if(sz <=1|| end[-1] !='\0')2613return NULL;2614 end--;26152616 ident_len =decode_varint(&next);2617if(next + ident_len > end)2618return NULL;2619 ident = (const char*)next;2620 next += ident_len;26212622 ouc = (const struct ondisk_untracked_cache *)next;2623if(next +ouc_size(0) > end)2624return NULL;26252626 uc =xcalloc(1,sizeof(*uc));2627strbuf_init(&uc->ident, ident_len);2628strbuf_add(&uc->ident, ident, ident_len);2629load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,2630 ouc->info_exclude_sha1);2631load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,2632 ouc->excludes_file_sha1);2633 uc->dir_flags =get_be32(&ouc->dir_flags);2634 uc->exclude_per_dir =xstrdup(ouc->exclude_per_dir);2635/* NUL after exclude_per_dir is covered by sizeof(*ouc) */2636 next +=ouc_size(strlen(ouc->exclude_per_dir));2637if(next >= end)2638goto done2;26392640 len =decode_varint(&next);2641if(next > end || len ==0)2642goto done2;26432644 rd.valid =ewah_new();2645 rd.check_only =ewah_new();2646 rd.sha1_valid =ewah_new();2647 rd.data = next;2648 rd.end = end;2649 rd.index =0;2650 rd.ucd =xmalloc(sizeof(*rd.ucd) * len);26512652if(read_one_dir(&uc->root, &rd) || rd.index != len)2653goto done;26542655 next = rd.data;2656 len =ewah_read_mmap(rd.valid, next, end - next);2657if(len <0)2658goto done;26592660 next += len;2661 len =ewah_read_mmap(rd.check_only, next, end - next);2662if(len <0)2663goto done;26642665 next += len;2666 len =ewah_read_mmap(rd.sha1_valid, next, end - next);2667if(len <0)2668goto done;26692670ewah_each_bit(rd.check_only, set_check_only, &rd);2671 rd.data = next + len;2672ewah_each_bit(rd.valid, read_stat, &rd);2673ewah_each_bit(rd.sha1_valid, read_sha1, &rd);2674 next = rd.data;26752676done:2677free(rd.ucd);2678ewah_free(rd.valid);2679ewah_free(rd.check_only);2680ewah_free(rd.sha1_valid);2681done2:2682if(next != end) {2683free_untracked_cache(uc);2684 uc = NULL;2685}2686return uc;2687}26882689static voidinvalidate_one_directory(struct untracked_cache *uc,2690struct untracked_cache_dir *ucd)2691{2692 uc->dir_invalidated++;2693 ucd->valid =0;2694 ucd->untracked_nr =0;2695}26962697/*2698 * Normally when an entry is added or removed from a directory,2699 * invalidating that directory is enough. No need to touch its2700 * ancestors. When a directory is shown as "foo/bar/" in git-status2701 * however, deleting or adding an entry may have cascading effect.2702 *2703 * Say the "foo/bar/file" has become untracked, we need to tell the2704 * untracked_cache_dir of "foo" that "bar/" is not an untracked2705 * directory any more (because "bar" is managed by foo as an untracked2706 * "file").2707 *2708 * Similarly, if "foo/bar/file" moves from untracked to tracked and it2709 * was the last untracked entry in the entire "foo", we should show2710 * "foo/" instead. Which means we have to invalidate past "bar" up to2711 * "foo".2712 *2713 * This function traverses all directories from root to leaf. If there2714 * is a chance of one of the above cases happening, we invalidate back2715 * to root. Otherwise we just invalidate the leaf. There may be a more2716 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to2717 * detect these cases and avoid unnecessary invalidation, for example,2718 * checking for the untracked entry named "bar/" in "foo", but for now2719 * stick to something safe and simple.2720 */2721static intinvalidate_one_component(struct untracked_cache *uc,2722struct untracked_cache_dir *dir,2723const char*path,int len)2724{2725const char*rest =strchr(path,'/');27262727if(rest) {2728int component_len = rest - path;2729struct untracked_cache_dir *d =2730lookup_untracked(uc, dir, path, component_len);2731int ret =2732invalidate_one_component(uc, d, rest +1,2733 len - (component_len +1));2734if(ret)2735invalidate_one_directory(uc, dir);2736return ret;2737}27382739invalidate_one_directory(uc, dir);2740return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;2741}27422743voiduntracked_cache_invalidate_path(struct index_state *istate,2744const char*path)2745{2746if(!istate->untracked || !istate->untracked->root)2747return;2748invalidate_one_component(istate->untracked, istate->untracked->root,2749 path,strlen(path));2750}27512752voiduntracked_cache_remove_from_index(struct index_state *istate,2753const char*path)2754{2755untracked_cache_invalidate_path(istate, path);2756}27572758voiduntracked_cache_add_to_index(struct index_state *istate,2759const char*path)2760{2761untracked_cache_invalidate_path(istate, path);2762}