Merge branch 'da/mergetool-winmerge'
[alt-git.git] / dir.c
blobd318ffcb2a6a51feca5aee993049fd0fa64acc8f
1 /*
2 * This handles recursive filename detection with exclude
3 * files, index knowledge etc..
5 * See Documentation/technical/api-directory-listing.txt
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"
19 struct path_simplify {
20 int len;
21 const char *path;
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.
30 enum path_treatment {
31 path_none = 0,
32 path_recurse,
33 path_excluded,
34 path_untracked
38 * Support data structure for our opendir/readdir/closedir wrappers
40 struct cached_dir {
41 DIR *fdir;
42 struct untracked_cache_dir *untracked;
43 int nr_files;
44 int nr_dirs;
46 struct dirent *de;
47 const char *file;
48 struct untracked_cache_dir *ucd;
51 static enum path_treatment read_directory_recursive(struct dir_struct *dir,
52 const char *path, int len, struct untracked_cache_dir *untracked,
53 int check_only, const struct path_simplify *simplify);
54 static int get_dtype(struct dirent *de, const char *path, int len);
56 /* helper string functions with support for the ignore_case flag */
57 int strcmp_icase(const char *a, const char *b)
59 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
62 int strncmp_icase(const char *a, const char *b, size_t count)
64 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
67 int fnmatch_icase(const char *pattern, const char *string, int flags)
69 return wildmatch(pattern, string,
70 flags | (ignore_case ? WM_CASEFOLD : 0),
71 NULL);
74 int git_fnmatch(const struct pathspec_item *item,
75 const char *pattern, const char *string,
76 int prefix)
78 if (prefix > 0) {
79 if (ps_strncmp(item, pattern, string, prefix))
80 return WM_NOMATCH;
81 pattern += prefix;
82 string += prefix;
84 if (item->flags & PATHSPEC_ONESTAR) {
85 int pattern_len = strlen(++pattern);
86 int string_len = strlen(string);
87 return string_len < pattern_len ||
88 ps_strcmp(item, pattern,
89 string + string_len - pattern_len);
91 if (item->magic & PATHSPEC_GLOB)
92 return wildmatch(pattern, string,
93 WM_PATHNAME |
94 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0),
95 NULL);
96 else
97 /* wildmatch has not learned no FNM_PATHNAME mode yet */
98 return wildmatch(pattern, string,
99 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
100 NULL);
103 static int fnmatch_icase_mem(const char *pattern, int patternlen,
104 const char *string, int stringlen,
105 int flags)
107 int match_status;
108 struct strbuf pat_buf = STRBUF_INIT;
109 struct strbuf str_buf = STRBUF_INIT;
110 const char *use_pat = pattern;
111 const char *use_str = string;
113 if (pattern[patternlen]) {
114 strbuf_add(&pat_buf, pattern, patternlen);
115 use_pat = pat_buf.buf;
117 if (string[stringlen]) {
118 strbuf_add(&str_buf, string, stringlen);
119 use_str = str_buf.buf;
122 if (ignore_case)
123 flags |= WM_CASEFOLD;
124 match_status = wildmatch(use_pat, use_str, flags, NULL);
126 strbuf_release(&pat_buf);
127 strbuf_release(&str_buf);
129 return match_status;
132 static size_t common_prefix_len(const struct pathspec *pathspec)
134 int n;
135 size_t max = 0;
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).
144 GUARD_PATHSPEC(pathspec,
145 PATHSPEC_FROMTOP |
146 PATHSPEC_MAXDEPTH |
147 PATHSPEC_LITERAL |
148 PATHSPEC_GLOB |
149 PATHSPEC_ICASE |
150 PATHSPEC_EXCLUDE);
152 for (n = 0; n < pathspec->nr; n++) {
153 size_t i = 0, len = 0, item_len;
154 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
155 continue;
156 if (pathspec->items[n].magic & PATHSPEC_ICASE)
157 item_len = pathspec->items[n].prefix;
158 else
159 item_len = pathspec->items[n].nowildcard_len;
160 while (i < item_len && (n == 0 || i < max)) {
161 char c = pathspec->items[n].match[i];
162 if (c != pathspec->items[0].match[i])
163 break;
164 if (c == '/')
165 len = i + 1;
166 i++;
168 if (n == 0 || len < max) {
169 max = len;
170 if (!max)
171 break;
174 return max;
178 * Returns a copy of the longest leading path common among all
179 * pathspecs.
181 char *common_prefix(const struct pathspec *pathspec)
183 unsigned long len = common_prefix_len(pathspec);
185 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
188 int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
190 size_t len;
193 * Calculate common prefix for the pathspec, and
194 * use that to optimize the directory walk
196 len = common_prefix_len(pathspec);
198 /* Read the directory and prune it */
199 read_directory(dir, pathspec->nr ? pathspec->_raw[0] : "", len, pathspec);
200 return len;
203 int within_depth(const char *name, int namelen,
204 int depth, int max_depth)
206 const char *cp = name, *cpe = name + namelen;
208 while (cp < cpe) {
209 if (*cp++ != '/')
210 continue;
211 depth++;
212 if (depth > max_depth)
213 return 0;
215 return 1;
218 #define DO_MATCH_EXCLUDE 1
219 #define DO_MATCH_DIRECTORY 2
222 * Does 'match' match the given name?
223 * A match is found if
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'.
229 * and the return value tells which case it was.
231 * It returns 0 when there is no match.
233 static int match_pathspec_item(const struct pathspec_item *item, int prefix,
234 const char *name, int namelen, unsigned flags)
236 /* name/namelen has prefix cut off by caller */
237 const char *match = item->match + prefix;
238 int matchlen = item->len - prefix;
241 * The normal call pattern is:
242 * 1. prefix = common_prefix_len(ps);
243 * 2. prune something, or fill_directory
244 * 3. match_pathspec()
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.
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.
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.
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)
269 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
270 strncmp(item->match, name - prefix, item->prefix))
271 return 0;
273 /* If the match was just the prefix, we matched */
274 if (!*match)
275 return MATCHED_RECURSIVELY;
277 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
278 if (matchlen == namelen)
279 return MATCHED_EXACTLY;
281 if (match[matchlen-1] == '/' || name[matchlen] == '/')
282 return MATCHED_RECURSIVELY;
283 } else if ((flags & DO_MATCH_DIRECTORY) &&
284 match[matchlen - 1] == '/' &&
285 namelen == matchlen - 1 &&
286 !ps_strncmp(item, match, name, namelen))
287 return MATCHED_EXACTLY;
289 if (item->nowildcard_len < item->len &&
290 !git_fnmatch(item, match, name,
291 item->nowildcard_len - prefix))
292 return MATCHED_FNMATCH;
294 return 0;
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.
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.
312 static int do_match_pathspec(const struct pathspec *ps,
313 const char *name, int namelen,
314 int prefix, char *seen,
315 unsigned flags)
317 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
319 GUARD_PATHSPEC(ps,
320 PATHSPEC_FROMTOP |
321 PATHSPEC_MAXDEPTH |
322 PATHSPEC_LITERAL |
323 PATHSPEC_GLOB |
324 PATHSPEC_ICASE |
325 PATHSPEC_EXCLUDE);
327 if (!ps->nr) {
328 if (!ps->recursive ||
329 !(ps->magic & PATHSPEC_MAXDEPTH) ||
330 ps->max_depth == -1)
331 return MATCHED_RECURSIVELY;
333 if (within_depth(name, namelen, 0, ps->max_depth))
334 return MATCHED_EXACTLY;
335 else
336 return 0;
339 name += prefix;
340 namelen -= prefix;
342 for (i = ps->nr - 1; i >= 0; i--) {
343 int how;
345 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
346 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
347 continue;
349 if (seen && seen[i] == MATCHED_EXACTLY)
350 continue;
352 * Make exclude patterns optional and never report
353 * "pathspec ':(exclude)foo' matches no files"
355 if (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);
359 if (ps->recursive &&
360 (ps->magic & PATHSPEC_MAXDEPTH) &&
361 ps->max_depth != -1 &&
362 how && how != MATCHED_FNMATCH) {
363 int len = ps->items[i].len;
364 if (name[len] == '/')
365 len++;
366 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
367 how = MATCHED_EXACTLY;
368 else
369 how = 0;
371 if (how) {
372 if (retval < how)
373 retval = how;
374 if (seen && seen[i] < how)
375 seen[i] = how;
378 return retval;
381 int match_pathspec(const struct pathspec *ps,
382 const char *name, int namelen,
383 int prefix, char *seen, int is_dir)
385 int positive, negative;
386 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
387 positive = do_match_pathspec(ps, name, namelen,
388 prefix, seen, flags);
389 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
390 return positive;
391 negative = do_match_pathspec(ps, name, namelen,
392 prefix, seen,
393 flags | DO_MATCH_EXCLUDE);
394 return negative ? 0 : positive;
397 int report_path_error(const char *ps_matched,
398 const struct pathspec *pathspec,
399 const char *prefix)
402 * Make sure all pathspec matched; otherwise it is an error.
404 struct strbuf sb = STRBUF_INIT;
405 int num, errors = 0;
406 for (num = 0; num < pathspec->nr; num++) {
407 int other, found_dup;
409 if (ps_matched[num])
410 continue;
412 * The caller might have fed identical pathspec
413 * twice. Do not barf on such a mistake.
414 * FIXME: parse_pathspec should have eliminated
415 * duplicate pathspec.
417 for (found_dup = other = 0;
418 !found_dup && other < pathspec->nr;
419 other++) {
420 if (other == num || !ps_matched[other])
421 continue;
422 if (!strcmp(pathspec->items[other].original,
423 pathspec->items[num].original))
425 * Ok, we have a match already.
427 found_dup = 1;
429 if (found_dup)
430 continue;
432 error("pathspec '%s' did not match any file(s) known to git.",
433 pathspec->items[num].original);
434 errors++;
436 strbuf_release(&sb);
437 return errors;
441 * Return the length of the "simple" part of a path match limiter.
443 int simple_length(const char *match)
445 int len = -1;
447 for (;;) {
448 unsigned char c = *match++;
449 len++;
450 if (c == '\0' || is_glob_special(c))
451 return len;
455 int no_wildcard(const char *string)
457 return string[simple_length(string)] == '\0';
460 void parse_exclude_pattern(const char **pattern,
461 int *patternlen,
462 int *flags,
463 int *nowildcardlen)
465 const char *p = *pattern;
466 size_t i, len;
468 *flags = 0;
469 if (*p == '!') {
470 *flags |= EXC_FLAG_NEGATIVE;
471 p++;
473 len = strlen(p);
474 if (len && p[len - 1] == '/') {
475 len--;
476 *flags |= EXC_FLAG_MUSTBEDIR;
478 for (i = 0; i < len; i++) {
479 if (p[i] == '/')
480 break;
482 if (i == len)
483 *flags |= EXC_FLAG_NODIR;
484 *nowildcardlen = simple_length(p);
486 * we should have excluded the trailing slash from 'p' too,
487 * but that's one more allocation. Instead just make sure
488 * nowildcardlen does not exceed real patternlen
490 if (*nowildcardlen > len)
491 *nowildcardlen = len;
492 if (*p == '*' && no_wildcard(p + 1))
493 *flags |= EXC_FLAG_ENDSWITH;
494 *pattern = p;
495 *patternlen = len;
498 void add_exclude(const char *string, const char *base,
499 int baselen, struct exclude_list *el, int srcpos)
501 struct exclude *x;
502 int patternlen;
503 int flags;
504 int nowildcardlen;
506 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
507 if (flags & EXC_FLAG_MUSTBEDIR) {
508 char *s;
509 x = xmalloc(sizeof(*x) + patternlen + 1);
510 s = (char *)(x+1);
511 memcpy(s, string, patternlen);
512 s[patternlen] = '\0';
513 x->pattern = s;
514 } else {
515 x = xmalloc(sizeof(*x));
516 x->pattern = string;
518 x->patternlen = patternlen;
519 x->nowildcardlen = nowildcardlen;
520 x->base = base;
521 x->baselen = baselen;
522 x->flags = flags;
523 x->srcpos = srcpos;
524 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
525 el->excludes[el->nr++] = x;
526 x->el = el;
529 static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
530 struct sha1_stat *sha1_stat)
532 int pos, len;
533 unsigned long sz;
534 enum object_type type;
535 void *data;
537 len = strlen(path);
538 pos = cache_name_pos(path, len);
539 if (pos < 0)
540 return NULL;
541 if (!ce_skip_worktree(active_cache[pos]))
542 return NULL;
543 data = read_sha1_file(active_cache[pos]->sha1, &type, &sz);
544 if (!data || type != OBJ_BLOB) {
545 free(data);
546 return NULL;
548 *size = xsize_t(sz);
549 if (sha1_stat) {
550 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
551 hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
553 return data;
557 * Frees memory within el which was allocated for exclude patterns and
558 * the file buffer. Does not free el itself.
560 void clear_exclude_list(struct exclude_list *el)
562 int i;
564 for (i = 0; i < el->nr; i++)
565 free(el->excludes[i]);
566 free(el->excludes);
567 free(el->filebuf);
569 el->nr = 0;
570 el->excludes = NULL;
571 el->filebuf = NULL;
574 static void trim_trailing_spaces(char *buf)
576 char *p, *last_space = NULL;
578 for (p = buf; *p; p++)
579 switch (*p) {
580 case ' ':
581 if (!last_space)
582 last_space = p;
583 break;
584 case '\\':
585 p++;
586 if (!*p)
587 return;
588 /* fallthrough */
589 default:
590 last_space = NULL;
593 if (last_space)
594 *last_space = '\0';
598 * Given a subdirectory name and "dir" of the current directory,
599 * search the subdir in "dir" and return it, or create a new one if it
600 * does not exist in "dir".
602 * If "name" has the trailing slash, it'll be excluded in the search.
604 static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
605 struct untracked_cache_dir *dir,
606 const char *name, int len)
608 int first, last;
609 struct untracked_cache_dir *d;
610 if (!dir)
611 return NULL;
612 if (len && name[len - 1] == '/')
613 len--;
614 first = 0;
615 last = dir->dirs_nr;
616 while (last > first) {
617 int cmp, next = (last + first) >> 1;
618 d = dir->dirs[next];
619 cmp = strncmp(name, d->name, len);
620 if (!cmp && strlen(d->name) > len)
621 cmp = -1;
622 if (!cmp)
623 return d;
624 if (cmp < 0) {
625 last = next;
626 continue;
628 first = next+1;
631 uc->dir_created++;
632 d = xmalloc(sizeof(*d) + len + 1);
633 memset(d, 0, sizeof(*d));
634 memcpy(d->name, name, len);
635 d->name[len] = '\0';
637 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
638 memmove(dir->dirs + first + 1, dir->dirs + first,
639 (dir->dirs_nr - first) * sizeof(*dir->dirs));
640 dir->dirs_nr++;
641 dir->dirs[first] = d;
642 return d;
645 static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
647 int i;
648 dir->valid = 0;
649 dir->untracked_nr = 0;
650 for (i = 0; i < dir->dirs_nr; i++)
651 do_invalidate_gitignore(dir->dirs[i]);
654 static void invalidate_gitignore(struct untracked_cache *uc,
655 struct untracked_cache_dir *dir)
657 uc->gitignore_invalidated++;
658 do_invalidate_gitignore(dir);
661 static void invalidate_directory(struct untracked_cache *uc,
662 struct untracked_cache_dir *dir)
664 int i;
665 uc->dir_invalidated++;
666 dir->valid = 0;
667 dir->untracked_nr = 0;
668 for (i = 0; i < dir->dirs_nr; i++)
669 dir->dirs[i]->recurse = 0;
673 * Given a file with name "fname", read it (either from disk, or from
674 * the index if "check_index" is non-zero), parse it and store the
675 * exclude rules in "el".
677 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
678 * stat data from disk (only valid if add_excludes returns zero). If
679 * ss_valid is non-zero, "ss" must contain good value as input.
681 static int add_excludes(const char *fname, const char *base, int baselen,
682 struct exclude_list *el, int check_index,
683 struct sha1_stat *sha1_stat)
685 struct stat st;
686 int fd, i, lineno = 1;
687 size_t size = 0;
688 char *buf, *entry;
690 fd = open(fname, O_RDONLY);
691 if (fd < 0 || fstat(fd, &st) < 0) {
692 if (errno != ENOENT)
693 warn_on_inaccessible(fname);
694 if (0 <= fd)
695 close(fd);
696 if (!check_index ||
697 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
698 return -1;
699 if (size == 0) {
700 free(buf);
701 return 0;
703 if (buf[size-1] != '\n') {
704 buf = xrealloc(buf, size+1);
705 buf[size++] = '\n';
707 } else {
708 size = xsize_t(st.st_size);
709 if (size == 0) {
710 if (sha1_stat) {
711 fill_stat_data(&sha1_stat->stat, &st);
712 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
713 sha1_stat->valid = 1;
715 close(fd);
716 return 0;
718 buf = xmalloc(size+1);
719 if (read_in_full(fd, buf, size) != size) {
720 free(buf);
721 close(fd);
722 return -1;
724 buf[size++] = '\n';
725 close(fd);
726 if (sha1_stat) {
727 int pos;
728 if (sha1_stat->valid &&
729 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st))
730 ; /* no content change, ss->sha1 still good */
731 else if (check_index &&
732 (pos = cache_name_pos(fname, strlen(fname))) >= 0 &&
733 !ce_stage(active_cache[pos]) &&
734 ce_uptodate(active_cache[pos]) &&
735 !would_convert_to_git(fname))
736 hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
737 else
738 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
739 fill_stat_data(&sha1_stat->stat, &st);
740 sha1_stat->valid = 1;
744 el->filebuf = buf;
746 if (skip_utf8_bom(&buf, size))
747 size -= buf - el->filebuf;
749 entry = buf;
751 for (i = 0; i < size; i++) {
752 if (buf[i] == '\n') {
753 if (entry != buf + i && entry[0] != '#') {
754 buf[i - (i && buf[i-1] == '\r')] = 0;
755 trim_trailing_spaces(entry);
756 add_exclude(entry, base, baselen, el, lineno);
758 lineno++;
759 entry = buf + i + 1;
762 return 0;
765 int add_excludes_from_file_to_list(const char *fname, const char *base,
766 int baselen, struct exclude_list *el,
767 int check_index)
769 return add_excludes(fname, base, baselen, el, check_index, NULL);
772 struct exclude_list *add_exclude_list(struct dir_struct *dir,
773 int group_type, const char *src)
775 struct exclude_list *el;
776 struct exclude_list_group *group;
778 group = &dir->exclude_list_group[group_type];
779 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
780 el = &group->el[group->nr++];
781 memset(el, 0, sizeof(*el));
782 el->src = src;
783 return el;
787 * Used to set up core.excludesfile and .git/info/exclude lists.
789 static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
790 struct sha1_stat *sha1_stat)
792 struct exclude_list *el;
794 * catch setup_standard_excludes() that's called before
795 * dir->untracked is assigned. That function behaves
796 * differently when dir->untracked is non-NULL.
798 if (!dir->untracked)
799 dir->unmanaged_exclude_files++;
800 el = add_exclude_list(dir, EXC_FILE, fname);
801 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0)
802 die("cannot use %s as an exclude file", fname);
805 void add_excludes_from_file(struct dir_struct *dir, const char *fname)
807 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
808 add_excludes_from_file_1(dir, fname, NULL);
811 int match_basename(const char *basename, int basenamelen,
812 const char *pattern, int prefix, int patternlen,
813 int flags)
815 if (prefix == patternlen) {
816 if (patternlen == basenamelen &&
817 !strncmp_icase(pattern, basename, basenamelen))
818 return 1;
819 } else if (flags & EXC_FLAG_ENDSWITH) {
820 /* "*literal" matching against "fooliteral" */
821 if (patternlen - 1 <= basenamelen &&
822 !strncmp_icase(pattern + 1,
823 basename + basenamelen - (patternlen - 1),
824 patternlen - 1))
825 return 1;
826 } else {
827 if (fnmatch_icase_mem(pattern, patternlen,
828 basename, basenamelen,
829 0) == 0)
830 return 1;
832 return 0;
835 int match_pathname(const char *pathname, int pathlen,
836 const char *base, int baselen,
837 const char *pattern, int prefix, int patternlen,
838 int flags)
840 const char *name;
841 int namelen;
844 * match with FNM_PATHNAME; the pattern has base implicitly
845 * in front of it.
847 if (*pattern == '/') {
848 pattern++;
849 patternlen--;
850 prefix--;
854 * baselen does not count the trailing slash. base[] may or
855 * may not end with a trailing slash though.
857 if (pathlen < baselen + 1 ||
858 (baselen && pathname[baselen] != '/') ||
859 strncmp_icase(pathname, base, baselen))
860 return 0;
862 namelen = baselen ? pathlen - baselen - 1 : pathlen;
863 name = pathname + pathlen - namelen;
865 if (prefix) {
867 * if the non-wildcard part is longer than the
868 * remaining pathname, surely it cannot match.
870 if (prefix > namelen)
871 return 0;
873 if (strncmp_icase(pattern, name, prefix))
874 return 0;
875 pattern += prefix;
876 patternlen -= prefix;
877 name += prefix;
878 namelen -= prefix;
881 * If the whole pattern did not have a wildcard,
882 * then our prefix match is all we need; we
883 * do not need to call fnmatch at all.
885 if (!patternlen && !namelen)
886 return 1;
889 return fnmatch_icase_mem(pattern, patternlen,
890 name, namelen,
891 WM_PATHNAME) == 0;
895 * Scan the given exclude list in reverse to see whether pathname
896 * should be ignored. The first match (i.e. the last on the list), if
897 * any, determines the fate. Returns the exclude_list element which
898 * matched, or NULL for undecided.
900 static struct exclude *last_exclude_matching_from_list(const char *pathname,
901 int pathlen,
902 const char *basename,
903 int *dtype,
904 struct exclude_list *el)
906 int i;
908 if (!el->nr)
909 return NULL; /* undefined */
911 for (i = el->nr - 1; 0 <= i; i--) {
912 struct exclude *x = el->excludes[i];
913 const char *exclude = x->pattern;
914 int prefix = x->nowildcardlen;
916 if (x->flags & EXC_FLAG_MUSTBEDIR) {
917 if (*dtype == DT_UNKNOWN)
918 *dtype = get_dtype(NULL, pathname, pathlen);
919 if (*dtype != DT_DIR)
920 continue;
923 if (x->flags & EXC_FLAG_NODIR) {
924 if (match_basename(basename,
925 pathlen - (basename - pathname),
926 exclude, prefix, x->patternlen,
927 x->flags))
928 return x;
929 continue;
932 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
933 if (match_pathname(pathname, pathlen,
934 x->base, x->baselen ? x->baselen - 1 : 0,
935 exclude, prefix, x->patternlen, x->flags))
936 return x;
938 return NULL; /* undecided */
942 * Scan the list and let the last match determine the fate.
943 * Return 1 for exclude, 0 for include and -1 for undecided.
945 int is_excluded_from_list(const char *pathname,
946 int pathlen, const char *basename, int *dtype,
947 struct exclude_list *el)
949 struct exclude *exclude;
950 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);
951 if (exclude)
952 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
953 return -1; /* undecided */
956 static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
957 const char *pathname, int pathlen, const char *basename,
958 int *dtype_p)
960 int i, j;
961 struct exclude_list_group *group;
962 struct exclude *exclude;
963 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
964 group = &dir->exclude_list_group[i];
965 for (j = group->nr - 1; j >= 0; j--) {
966 exclude = last_exclude_matching_from_list(
967 pathname, pathlen, basename, dtype_p,
968 &group->el[j]);
969 if (exclude)
970 return exclude;
973 return NULL;
977 * Loads the per-directory exclude list for the substring of base
978 * which has a char length of baselen.
980 static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
982 struct exclude_list_group *group;
983 struct exclude_list *el;
984 struct exclude_stack *stk = NULL;
985 struct untracked_cache_dir *untracked;
986 int current;
988 group = &dir->exclude_list_group[EXC_DIRS];
991 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
992 * which originate from directories not in the prefix of the
993 * path being checked.
995 while ((stk = dir->exclude_stack) != NULL) {
996 if (stk->baselen <= baselen &&
997 !strncmp(dir->basebuf.buf, base, stk->baselen))
998 break;
999 el = &group->el[dir->exclude_stack->exclude_ix];
1000 dir->exclude_stack = stk->prev;
1001 dir->exclude = NULL;
1002 free((char *)el->src); /* see strbuf_detach() below */
1003 clear_exclude_list(el);
1004 free(stk);
1005 group->nr--;
1008 /* Skip traversing into sub directories if the parent is excluded */
1009 if (dir->exclude)
1010 return;
1013 * Lazy initialization. All call sites currently just
1014 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1015 * them seems lots of work for little benefit.
1017 if (!dir->basebuf.buf)
1018 strbuf_init(&dir->basebuf, PATH_MAX);
1020 /* Read from the parent directories and push them down. */
1021 current = stk ? stk->baselen : -1;
1022 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
1023 if (dir->untracked)
1024 untracked = stk ? stk->ucd : dir->untracked->root;
1025 else
1026 untracked = NULL;
1028 while (current < baselen) {
1029 const char *cp;
1030 struct sha1_stat sha1_stat;
1032 stk = xcalloc(1, sizeof(*stk));
1033 if (current < 0) {
1034 cp = base;
1035 current = 0;
1036 } else {
1037 cp = strchr(base + current + 1, '/');
1038 if (!cp)
1039 die("oops in prep_exclude");
1040 cp++;
1041 untracked =
1042 lookup_untracked(dir->untracked, untracked,
1043 base + current,
1044 cp - base - current);
1046 stk->prev = dir->exclude_stack;
1047 stk->baselen = cp - base;
1048 stk->exclude_ix = group->nr;
1049 stk->ucd = untracked;
1050 el = add_exclude_list(dir, EXC_DIRS, NULL);
1051 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1052 assert(stk->baselen == dir->basebuf.len);
1054 /* Abort if the directory is excluded */
1055 if (stk->baselen) {
1056 int dt = DT_DIR;
1057 dir->basebuf.buf[stk->baselen - 1] = 0;
1058 dir->exclude = last_exclude_matching_from_lists(dir,
1059 dir->basebuf.buf, stk->baselen - 1,
1060 dir->basebuf.buf + current, &dt);
1061 dir->basebuf.buf[stk->baselen - 1] = '/';
1062 if (dir->exclude &&
1063 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1064 dir->exclude = NULL;
1065 if (dir->exclude) {
1066 dir->exclude_stack = stk;
1067 return;
1071 /* Try to read per-directory file */
1072 hashclr(sha1_stat.sha1);
1073 sha1_stat.valid = 0;
1074 if (dir->exclude_per_dir &&
1076 * If we know that no files have been added in
1077 * this directory (i.e. valid_cached_dir() has
1078 * been executed and set untracked->valid) ..
1080 (!untracked || !untracked->valid ||
1082 * .. and .gitignore does not exist before
1083 * (i.e. null exclude_sha1 and skip_worktree is
1084 * not set). Then we can skip loading .gitignore,
1085 * which would result in ENOENT anyway.
1086 * skip_worktree is taken care in read_directory()
1088 !is_null_sha1(untracked->exclude_sha1))) {
1090 * dir->basebuf gets reused by the traversal, but we
1091 * need fname to remain unchanged to ensure the src
1092 * member of each struct exclude correctly
1093 * back-references its source file. Other invocations
1094 * of add_exclude_list provide stable strings, so we
1095 * strbuf_detach() and free() here in the caller.
1097 struct strbuf sb = STRBUF_INIT;
1098 strbuf_addbuf(&sb, &dir->basebuf);
1099 strbuf_addstr(&sb, dir->exclude_per_dir);
1100 el->src = strbuf_detach(&sb, NULL);
1101 add_excludes(el->src, el->src, stk->baselen, el, 1,
1102 untracked ? &sha1_stat : NULL);
1105 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1106 * will first be called in valid_cached_dir() then maybe many
1107 * times more in last_exclude_matching(). When the cache is
1108 * used, last_exclude_matching() will not be called and
1109 * reading .gitignore content will be a waste.
1111 * So when it's called by valid_cached_dir() and we can get
1112 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1113 * modified on work tree), we could delay reading the
1114 * .gitignore content until we absolutely need it in
1115 * last_exclude_matching(). Be careful about ignore rule
1116 * order, though, if you do that.
1118 if (untracked &&
1119 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1120 invalidate_gitignore(dir->untracked, untracked);
1121 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
1123 dir->exclude_stack = stk;
1124 current = stk->baselen;
1126 strbuf_setlen(&dir->basebuf, baselen);
1130 * Loads the exclude lists for the directory containing pathname, then
1131 * scans all exclude lists to determine whether pathname is excluded.
1132 * Returns the exclude_list element which matched, or NULL for
1133 * undecided.
1135 struct exclude *last_exclude_matching(struct dir_struct *dir,
1136 const char *pathname,
1137 int *dtype_p)
1139 int pathlen = strlen(pathname);
1140 const char *basename = strrchr(pathname, '/');
1141 basename = (basename) ? basename+1 : pathname;
1143 prep_exclude(dir, pathname, basename-pathname);
1145 if (dir->exclude)
1146 return dir->exclude;
1148 return last_exclude_matching_from_lists(dir, pathname, pathlen,
1149 basename, dtype_p);
1153 * Loads the exclude lists for the directory containing pathname, then
1154 * scans all exclude lists to determine whether pathname is excluded.
1155 * Returns 1 if true, otherwise 0.
1157 int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
1159 struct exclude *exclude =
1160 last_exclude_matching(dir, pathname, dtype_p);
1161 if (exclude)
1162 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
1163 return 0;
1166 static struct dir_entry *dir_entry_new(const char *pathname, int len)
1168 struct dir_entry *ent;
1170 ent = xmalloc(sizeof(*ent) + len + 1);
1171 ent->len = len;
1172 memcpy(ent->name, pathname, len);
1173 ent->name[len] = 0;
1174 return ent;
1177 static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
1179 if (cache_file_exists(pathname, len, ignore_case))
1180 return NULL;
1182 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
1183 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1186 struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)
1188 if (!cache_name_is_other(pathname, len))
1189 return NULL;
1191 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
1192 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1195 enum exist_status {
1196 index_nonexistent = 0,
1197 index_directory,
1198 index_gitdir
1202 * Do not use the alphabetically sorted index to look up
1203 * the directory name; instead, use the case insensitive
1204 * directory hash.
1206 static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
1208 const struct cache_entry *ce = cache_dir_exists(dirname, len);
1209 unsigned char endchar;
1211 if (!ce)
1212 return index_nonexistent;
1213 endchar = ce->name[len];
1216 * The cache_entry structure returned will contain this dirname
1217 * and possibly additional path components.
1219 if (endchar == '/')
1220 return index_directory;
1223 * If there are no additional path components, then this cache_entry
1224 * represents a submodule. Submodules, despite being directories,
1225 * are stored in the cache without a closing slash.
1227 if (!endchar && S_ISGITLINK(ce->ce_mode))
1228 return index_gitdir;
1230 /* This should never be hit, but it exists just in case. */
1231 return index_nonexistent;
1235 * The index sorts alphabetically by entry name, which
1236 * means that a gitlink sorts as '\0' at the end, while
1237 * a directory (which is defined not as an entry, but as
1238 * the files it contains) will sort with the '/' at the
1239 * end.
1241 static enum exist_status directory_exists_in_index(const char *dirname, int len)
1243 int pos;
1245 if (ignore_case)
1246 return directory_exists_in_index_icase(dirname, len);
1248 pos = cache_name_pos(dirname, len);
1249 if (pos < 0)
1250 pos = -pos-1;
1251 while (pos < active_nr) {
1252 const struct cache_entry *ce = active_cache[pos++];
1253 unsigned char endchar;
1255 if (strncmp(ce->name, dirname, len))
1256 break;
1257 endchar = ce->name[len];
1258 if (endchar > '/')
1259 break;
1260 if (endchar == '/')
1261 return index_directory;
1262 if (!endchar && S_ISGITLINK(ce->ce_mode))
1263 return index_gitdir;
1265 return index_nonexistent;
1269 * When we find a directory when traversing the filesystem, we
1270 * have three distinct cases:
1272 * - ignore it
1273 * - see it as a directory
1274 * - recurse into it
1276 * and which one we choose depends on a combination of existing
1277 * git index contents and the flags passed into the directory
1278 * traversal routine.
1280 * Case 1: If we *already* have entries in the index under that
1281 * directory name, we always recurse into the directory to see
1282 * all the files.
1284 * Case 2: If we *already* have that directory name as a gitlink,
1285 * we always continue to see it as a gitlink, regardless of whether
1286 * there is an actual git directory there or not (it might not
1287 * be checked out as a subproject!)
1289 * Case 3: if we didn't have it in the index previously, we
1290 * have a few sub-cases:
1292 * (a) if "show_other_directories" is true, we show it as
1293 * just a directory, unless "hide_empty_directories" is
1294 * also true, in which case we need to check if it contains any
1295 * untracked and / or ignored files.
1296 * (b) if it looks like a git directory, and we don't have
1297 * 'no_gitlinks' set we treat it as a gitlink, and show it
1298 * as a directory.
1299 * (c) otherwise, we recurse into it.
1301 static enum path_treatment treat_directory(struct dir_struct *dir,
1302 struct untracked_cache_dir *untracked,
1303 const char *dirname, int len, int exclude,
1304 const struct path_simplify *simplify)
1306 /* The "len-1" is to strip the final '/' */
1307 switch (directory_exists_in_index(dirname, len-1)) {
1308 case index_directory:
1309 return path_recurse;
1311 case index_gitdir:
1312 return path_none;
1314 case index_nonexistent:
1315 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
1316 break;
1317 if (!(dir->flags & DIR_NO_GITLINKS)) {
1318 unsigned char sha1[20];
1319 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
1320 return path_untracked;
1322 return path_recurse;
1325 /* This is the "show_other_directories" case */
1327 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
1328 return exclude ? path_excluded : path_untracked;
1330 untracked = lookup_untracked(dir->untracked, untracked, dirname, len);
1331 return read_directory_recursive(dir, dirname, len,
1332 untracked, 1, simplify);
1336 * This is an inexact early pruning of any recursive directory
1337 * reading - if the path cannot possibly be in the pathspec,
1338 * return true, and we'll skip it early.
1340 static int simplify_away(const char *path, int pathlen, const struct path_simplify *simplify)
1342 if (simplify) {
1343 for (;;) {
1344 const char *match = simplify->path;
1345 int len = simplify->len;
1347 if (!match)
1348 break;
1349 if (len > pathlen)
1350 len = pathlen;
1351 if (!memcmp(path, match, len))
1352 return 0;
1353 simplify++;
1355 return 1;
1357 return 0;
1361 * This function tells us whether an excluded path matches a
1362 * list of "interesting" pathspecs. That is, whether a path matched
1363 * by any of the pathspecs could possibly be ignored by excluding
1364 * the specified path. This can happen if:
1366 * 1. the path is mentioned explicitly in the pathspec
1368 * 2. the path is a directory prefix of some element in the
1369 * pathspec
1371 static int exclude_matches_pathspec(const char *path, int len,
1372 const struct path_simplify *simplify)
1374 if (simplify) {
1375 for (; simplify->path; simplify++) {
1376 if (len == simplify->len
1377 && !memcmp(path, simplify->path, len))
1378 return 1;
1379 if (len < simplify->len
1380 && simplify->path[len] == '/'
1381 && !memcmp(path, simplify->path, len))
1382 return 1;
1385 return 0;
1388 static int get_index_dtype(const char *path, int len)
1390 int pos;
1391 const struct cache_entry *ce;
1393 ce = cache_file_exists(path, len, 0);
1394 if (ce) {
1395 if (!ce_uptodate(ce))
1396 return DT_UNKNOWN;
1397 if (S_ISGITLINK(ce->ce_mode))
1398 return DT_DIR;
1400 * Nobody actually cares about the
1401 * difference between DT_LNK and DT_REG
1403 return DT_REG;
1406 /* Try to look it up as a directory */
1407 pos = cache_name_pos(path, len);
1408 if (pos >= 0)
1409 return DT_UNKNOWN;
1410 pos = -pos-1;
1411 while (pos < active_nr) {
1412 ce = active_cache[pos++];
1413 if (strncmp(ce->name, path, len))
1414 break;
1415 if (ce->name[len] > '/')
1416 break;
1417 if (ce->name[len] < '/')
1418 continue;
1419 if (!ce_uptodate(ce))
1420 break; /* continue? */
1421 return DT_DIR;
1423 return DT_UNKNOWN;
1426 static int get_dtype(struct dirent *de, const char *path, int len)
1428 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
1429 struct stat st;
1431 if (dtype != DT_UNKNOWN)
1432 return dtype;
1433 dtype = get_index_dtype(path, len);
1434 if (dtype != DT_UNKNOWN)
1435 return dtype;
1436 if (lstat(path, &st))
1437 return dtype;
1438 if (S_ISREG(st.st_mode))
1439 return DT_REG;
1440 if (S_ISDIR(st.st_mode))
1441 return DT_DIR;
1442 if (S_ISLNK(st.st_mode))
1443 return DT_LNK;
1444 return dtype;
1447 static enum path_treatment treat_one_path(struct dir_struct *dir,
1448 struct untracked_cache_dir *untracked,
1449 struct strbuf *path,
1450 const struct path_simplify *simplify,
1451 int dtype, struct dirent *de)
1453 int exclude;
1454 int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);
1456 if (dtype == DT_UNKNOWN)
1457 dtype = get_dtype(de, path->buf, path->len);
1459 /* Always exclude indexed files */
1460 if (dtype != DT_DIR && has_path_in_index)
1461 return path_none;
1464 * When we are looking at a directory P in the working tree,
1465 * there are three cases:
1467 * (1) P exists in the index. Everything inside the directory P in
1468 * the working tree needs to go when P is checked out from the
1469 * index.
1471 * (2) P does not exist in the index, but there is P/Q in the index.
1472 * We know P will stay a directory when we check out the contents
1473 * of the index, but we do not know yet if there is a directory
1474 * P/Q in the working tree to be killed, so we need to recurse.
1476 * (3) P does not exist in the index, and there is no P/Q in the index
1477 * to require P to be a directory, either. Only in this case, we
1478 * know that everything inside P will not be killed without
1479 * recursing.
1481 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1482 (dtype == DT_DIR) &&
1483 !has_path_in_index &&
1484 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))
1485 return path_none;
1487 exclude = is_excluded(dir, path->buf, &dtype);
1490 * Excluded? If we don't explicitly want to show
1491 * ignored files, ignore it
1493 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
1494 return path_excluded;
1496 switch (dtype) {
1497 default:
1498 return path_none;
1499 case DT_DIR:
1500 strbuf_addch(path, '/');
1501 return treat_directory(dir, untracked, path->buf, path->len, exclude,
1502 simplify);
1503 case DT_REG:
1504 case DT_LNK:
1505 return exclude ? path_excluded : path_untracked;
1509 static enum path_treatment treat_path_fast(struct dir_struct *dir,
1510 struct untracked_cache_dir *untracked,
1511 struct cached_dir *cdir,
1512 struct strbuf *path,
1513 int baselen,
1514 const struct path_simplify *simplify)
1516 strbuf_setlen(path, baselen);
1517 if (!cdir->ucd) {
1518 strbuf_addstr(path, cdir->file);
1519 return path_untracked;
1521 strbuf_addstr(path, cdir->ucd->name);
1522 /* treat_one_path() does this before it calls treat_directory() */
1523 if (path->buf[path->len - 1] != '/')
1524 strbuf_addch(path, '/');
1525 if (cdir->ucd->check_only)
1527 * check_only is set as a result of treat_directory() getting
1528 * to its bottom. Verify again the same set of directories
1529 * with check_only set.
1531 return read_directory_recursive(dir, path->buf, path->len,
1532 cdir->ucd, 1, simplify);
1534 * We get path_recurse in the first run when
1535 * directory_exists_in_index() returns index_nonexistent. We
1536 * are sure that new changes in the index does not impact the
1537 * outcome. Return now.
1539 return path_recurse;
1542 static enum path_treatment treat_path(struct dir_struct *dir,
1543 struct untracked_cache_dir *untracked,
1544 struct cached_dir *cdir,
1545 struct strbuf *path,
1546 int baselen,
1547 const struct path_simplify *simplify)
1549 int dtype;
1550 struct dirent *de = cdir->de;
1552 if (!de)
1553 return treat_path_fast(dir, untracked, cdir, path,
1554 baselen, simplify);
1555 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
1556 return path_none;
1557 strbuf_setlen(path, baselen);
1558 strbuf_addstr(path, de->d_name);
1559 if (simplify_away(path->buf, path->len, simplify))
1560 return path_none;
1562 dtype = DTYPE(de);
1563 return treat_one_path(dir, untracked, path, simplify, dtype, de);
1566 static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1568 if (!dir)
1569 return;
1570 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1571 dir->untracked_alloc);
1572 dir->untracked[dir->untracked_nr++] = xstrdup(name);
1575 static int valid_cached_dir(struct dir_struct *dir,
1576 struct untracked_cache_dir *untracked,
1577 struct strbuf *path,
1578 int check_only)
1580 struct stat st;
1582 if (!untracked)
1583 return 0;
1585 if (stat(path->len ? path->buf : ".", &st)) {
1586 invalidate_directory(dir->untracked, untracked);
1587 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1588 return 0;
1590 if (!untracked->valid ||
1591 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {
1592 if (untracked->valid)
1593 invalidate_directory(dir->untracked, untracked);
1594 fill_stat_data(&untracked->stat_data, &st);
1595 return 0;
1598 if (untracked->check_only != !!check_only) {
1599 invalidate_directory(dir->untracked, untracked);
1600 return 0;
1604 * prep_exclude will be called eventually on this directory,
1605 * but it's called much later in last_exclude_matching(). We
1606 * need it now to determine the validity of the cache for this
1607 * path. The next calls will be nearly no-op, the way
1608 * prep_exclude() is designed.
1610 if (path->len && path->buf[path->len - 1] != '/') {
1611 strbuf_addch(path, '/');
1612 prep_exclude(dir, path->buf, path->len);
1613 strbuf_setlen(path, path->len - 1);
1614 } else
1615 prep_exclude(dir, path->buf, path->len);
1617 /* hopefully prep_exclude() haven't invalidated this entry... */
1618 return untracked->valid;
1621 static int open_cached_dir(struct cached_dir *cdir,
1622 struct dir_struct *dir,
1623 struct untracked_cache_dir *untracked,
1624 struct strbuf *path,
1625 int check_only)
1627 memset(cdir, 0, sizeof(*cdir));
1628 cdir->untracked = untracked;
1629 if (valid_cached_dir(dir, untracked, path, check_only))
1630 return 0;
1631 cdir->fdir = opendir(path->len ? path->buf : ".");
1632 if (dir->untracked)
1633 dir->untracked->dir_opened++;
1634 if (!cdir->fdir)
1635 return -1;
1636 return 0;
1639 static int read_cached_dir(struct cached_dir *cdir)
1641 if (cdir->fdir) {
1642 cdir->de = readdir(cdir->fdir);
1643 if (!cdir->de)
1644 return -1;
1645 return 0;
1647 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1648 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
1649 if (!d->recurse) {
1650 cdir->nr_dirs++;
1651 continue;
1653 cdir->ucd = d;
1654 cdir->nr_dirs++;
1655 return 0;
1657 cdir->ucd = NULL;
1658 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1659 struct untracked_cache_dir *d = cdir->untracked;
1660 cdir->file = d->untracked[cdir->nr_files++];
1661 return 0;
1663 return -1;
1666 static void close_cached_dir(struct cached_dir *cdir)
1668 if (cdir->fdir)
1669 closedir(cdir->fdir);
1671 * We have gone through this directory and found no untracked
1672 * entries. Mark it valid.
1674 if (cdir->untracked) {
1675 cdir->untracked->valid = 1;
1676 cdir->untracked->recurse = 1;
1681 * Read a directory tree. We currently ignore anything but
1682 * directories, regular files and symlinks. That's because git
1683 * doesn't handle them at all yet. Maybe that will change some
1684 * day.
1686 * Also, we ignore the name ".git" (even if it is not a directory).
1687 * That likely will not change.
1689 * Returns the most significant path_treatment value encountered in the scan.
1691 static enum path_treatment read_directory_recursive(struct dir_struct *dir,
1692 const char *base, int baselen,
1693 struct untracked_cache_dir *untracked, int check_only,
1694 const struct path_simplify *simplify)
1696 struct cached_dir cdir;
1697 enum path_treatment state, subdir_state, dir_state = path_none;
1698 struct strbuf path = STRBUF_INIT;
1700 strbuf_add(&path, base, baselen);
1702 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))
1703 goto out;
1705 if (untracked)
1706 untracked->check_only = !!check_only;
1708 while (!read_cached_dir(&cdir)) {
1709 /* check how the file or directory should be treated */
1710 state = treat_path(dir, untracked, &cdir, &path, baselen, simplify);
1712 if (state > dir_state)
1713 dir_state = state;
1715 /* recurse into subdir if instructed by treat_path */
1716 if (state == path_recurse) {
1717 struct untracked_cache_dir *ud;
1718 ud = lookup_untracked(dir->untracked, untracked,
1719 path.buf + baselen,
1720 path.len - baselen);
1721 subdir_state =
1722 read_directory_recursive(dir, path.buf, path.len,
1723 ud, check_only, simplify);
1724 if (subdir_state > dir_state)
1725 dir_state = subdir_state;
1728 if (check_only) {
1729 /* abort early if maximum state has been reached */
1730 if (dir_state == path_untracked) {
1731 if (cdir.fdir)
1732 add_untracked(untracked, path.buf + baselen);
1733 break;
1735 /* skip the dir_add_* part */
1736 continue;
1739 /* add the path to the appropriate result list */
1740 switch (state) {
1741 case path_excluded:
1742 if (dir->flags & DIR_SHOW_IGNORED)
1743 dir_add_name(dir, path.buf, path.len);
1744 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1745 ((dir->flags & DIR_COLLECT_IGNORED) &&
1746 exclude_matches_pathspec(path.buf, path.len,
1747 simplify)))
1748 dir_add_ignored(dir, path.buf, path.len);
1749 break;
1751 case path_untracked:
1752 if (dir->flags & DIR_SHOW_IGNORED)
1753 break;
1754 dir_add_name(dir, path.buf, path.len);
1755 if (cdir.fdir)
1756 add_untracked(untracked, path.buf + baselen);
1757 break;
1759 default:
1760 break;
1763 close_cached_dir(&cdir);
1764 out:
1765 strbuf_release(&path);
1767 return dir_state;
1770 static int cmp_name(const void *p1, const void *p2)
1772 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1773 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1775 return name_compare(e1->name, e1->len, e2->name, e2->len);
1778 static struct path_simplify *create_simplify(const char **pathspec)
1780 int nr, alloc = 0;
1781 struct path_simplify *simplify = NULL;
1783 if (!pathspec)
1784 return NULL;
1786 for (nr = 0 ; ; nr++) {
1787 const char *match;
1788 ALLOC_GROW(simplify, nr + 1, alloc);
1789 match = *pathspec++;
1790 if (!match)
1791 break;
1792 simplify[nr].path = match;
1793 simplify[nr].len = simple_length(match);
1795 simplify[nr].path = NULL;
1796 simplify[nr].len = 0;
1797 return simplify;
1800 static void free_simplify(struct path_simplify *simplify)
1802 free(simplify);
1805 static int treat_leading_path(struct dir_struct *dir,
1806 const char *path, int len,
1807 const struct path_simplify *simplify)
1809 struct strbuf sb = STRBUF_INIT;
1810 int baselen, rc = 0;
1811 const char *cp;
1812 int old_flags = dir->flags;
1814 while (len && path[len - 1] == '/')
1815 len--;
1816 if (!len)
1817 return 1;
1818 baselen = 0;
1819 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
1820 while (1) {
1821 cp = path + baselen + !!baselen;
1822 cp = memchr(cp, '/', path + len - cp);
1823 if (!cp)
1824 baselen = len;
1825 else
1826 baselen = cp - path;
1827 strbuf_setlen(&sb, 0);
1828 strbuf_add(&sb, path, baselen);
1829 if (!is_directory(sb.buf))
1830 break;
1831 if (simplify_away(sb.buf, sb.len, simplify))
1832 break;
1833 if (treat_one_path(dir, NULL, &sb, simplify,
1834 DT_DIR, NULL) == path_none)
1835 break; /* do not recurse into it */
1836 if (len <= baselen) {
1837 rc = 1;
1838 break; /* finished checking */
1841 strbuf_release(&sb);
1842 dir->flags = old_flags;
1843 return rc;
1846 static const char *get_ident_string(void)
1848 static struct strbuf sb = STRBUF_INIT;
1849 struct utsname uts;
1851 if (sb.len)
1852 return sb.buf;
1853 if (uname(&uts))
1854 die_errno(_("failed to get kernel name and information"));
1855 strbuf_addf(&sb, "Location %s, system %s %s %s", get_git_work_tree(),
1856 uts.sysname, uts.release, uts.version);
1857 return sb.buf;
1860 static int ident_in_untracked(const struct untracked_cache *uc)
1862 const char *end = uc->ident.buf + uc->ident.len;
1863 const char *p = uc->ident.buf;
1865 for (p = uc->ident.buf; p < end; p += strlen(p) + 1)
1866 if (!strcmp(p, get_ident_string()))
1867 return 1;
1868 return 0;
1871 void add_untracked_ident(struct untracked_cache *uc)
1873 if (ident_in_untracked(uc))
1874 return;
1875 strbuf_addstr(&uc->ident, get_ident_string());
1876 /* this strbuf contains a list of strings, save NUL too */
1877 strbuf_addch(&uc->ident, 0);
1880 static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
1881 int base_len,
1882 const struct pathspec *pathspec)
1884 struct untracked_cache_dir *root;
1885 int i;
1887 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
1888 return NULL;
1891 * We only support $GIT_DIR/info/exclude and core.excludesfile
1892 * as the global ignore rule files. Any other additions
1893 * (e.g. from command line) invalidate the cache. This
1894 * condition also catches running setup_standard_excludes()
1895 * before setting dir->untracked!
1897 if (dir->unmanaged_exclude_files)
1898 return NULL;
1901 * Optimize for the main use case only: whole-tree git
1902 * status. More work involved in treat_leading_path() if we
1903 * use cache on just a subset of the worktree. pathspec
1904 * support could make the matter even worse.
1906 if (base_len || (pathspec && pathspec->nr))
1907 return NULL;
1909 /* Different set of flags may produce different results */
1910 if (dir->flags != dir->untracked->dir_flags ||
1912 * See treat_directory(), case index_nonexistent. Without
1913 * this flag, we may need to also cache .git file content
1914 * for the resolve_gitlink_ref() call, which we don't.
1916 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
1917 /* We don't support collecting ignore files */
1918 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
1919 DIR_COLLECT_IGNORED)))
1920 return NULL;
1923 * If we use .gitignore in the cache and now you change it to
1924 * .gitexclude, everything will go wrong.
1926 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
1927 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
1928 return NULL;
1931 * EXC_CMDL is not considered in the cache. If people set it,
1932 * skip the cache.
1934 if (dir->exclude_list_group[EXC_CMDL].nr)
1935 return NULL;
1938 * An optimization in prep_exclude() does not play well with
1939 * CE_SKIP_WORKTREE. It's a rare case anyway, if a single
1940 * entry has that bit set, disable the whole untracked cache.
1942 for (i = 0; i < active_nr; i++)
1943 if (ce_skip_worktree(active_cache[i]))
1944 return NULL;
1946 if (!ident_in_untracked(dir->untracked)) {
1947 warning(_("Untracked cache is disabled on this system."));
1948 return NULL;
1951 if (!dir->untracked->root) {
1952 const int len = sizeof(*dir->untracked->root);
1953 dir->untracked->root = xmalloc(len);
1954 memset(dir->untracked->root, 0, len);
1957 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
1958 root = dir->untracked->root;
1959 if (hashcmp(dir->ss_info_exclude.sha1,
1960 dir->untracked->ss_info_exclude.sha1)) {
1961 invalidate_gitignore(dir->untracked, root);
1962 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
1964 if (hashcmp(dir->ss_excludes_file.sha1,
1965 dir->untracked->ss_excludes_file.sha1)) {
1966 invalidate_gitignore(dir->untracked, root);
1967 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
1970 /* Make sure this directory is not dropped out at saving phase */
1971 root->recurse = 1;
1972 return root;
1975 int read_directory(struct dir_struct *dir, const char *path, int len, const struct pathspec *pathspec)
1977 struct path_simplify *simplify;
1978 struct untracked_cache_dir *untracked;
1981 * Check out create_simplify()
1983 if (pathspec)
1984 GUARD_PATHSPEC(pathspec,
1985 PATHSPEC_FROMTOP |
1986 PATHSPEC_MAXDEPTH |
1987 PATHSPEC_LITERAL |
1988 PATHSPEC_GLOB |
1989 PATHSPEC_ICASE |
1990 PATHSPEC_EXCLUDE);
1992 if (has_symlink_leading_path(path, len))
1993 return dir->nr;
1996 * exclude patterns are treated like positive ones in
1997 * create_simplify. Usually exclude patterns should be a
1998 * subset of positive ones, which has no impacts on
1999 * create_simplify().
2001 simplify = create_simplify(pathspec ? pathspec->_raw : NULL);
2002 untracked = validate_untracked_cache(dir, len, pathspec);
2003 if (!untracked)
2005 * make sure untracked cache code path is disabled,
2006 * e.g. prep_exclude()
2008 dir->untracked = NULL;
2009 if (!len || treat_leading_path(dir, path, len, simplify))
2010 read_directory_recursive(dir, path, len, untracked, 0, simplify);
2011 free_simplify(simplify);
2012 qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);
2013 qsort(dir->ignored, dir->ignored_nr, sizeof(struct dir_entry *), cmp_name);
2014 if (dir->untracked) {
2015 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2016 trace_printf_key(&trace_untracked_stats,
2017 "node creation: %u\n"
2018 "gitignore invalidation: %u\n"
2019 "directory invalidation: %u\n"
2020 "opendir: %u\n",
2021 dir->untracked->dir_created,
2022 dir->untracked->gitignore_invalidated,
2023 dir->untracked->dir_invalidated,
2024 dir->untracked->dir_opened);
2025 if (dir->untracked == the_index.untracked &&
2026 (dir->untracked->dir_opened ||
2027 dir->untracked->gitignore_invalidated ||
2028 dir->untracked->dir_invalidated))
2029 the_index.cache_changed |= UNTRACKED_CHANGED;
2030 if (dir->untracked != the_index.untracked) {
2031 free(dir->untracked);
2032 dir->untracked = NULL;
2035 return dir->nr;
2038 int file_exists(const char *f)
2040 struct stat sb;
2041 return lstat(f, &sb) == 0;
2045 * Given two normalized paths (a trailing slash is ok), if subdir is
2046 * outside dir, return -1. Otherwise return the offset in subdir that
2047 * can be used as relative path to dir.
2049 int dir_inside_of(const char *subdir, const char *dir)
2051 int offset = 0;
2053 assert(dir && subdir && *dir && *subdir);
2055 while (*dir && *subdir && *dir == *subdir) {
2056 dir++;
2057 subdir++;
2058 offset++;
2061 /* hel[p]/me vs hel[l]/yeah */
2062 if (*dir && *subdir)
2063 return -1;
2065 if (!*subdir)
2066 return !*dir ? offset : -1; /* same dir */
2068 /* foo/[b]ar vs foo/[] */
2069 if (is_dir_sep(dir[-1]))
2070 return is_dir_sep(subdir[-1]) ? offset : -1;
2072 /* foo[/]bar vs foo[] */
2073 return is_dir_sep(*subdir) ? offset + 1 : -1;
2076 int is_inside_dir(const char *dir)
2078 char *cwd;
2079 int rc;
2081 if (!dir)
2082 return 0;
2084 cwd = xgetcwd();
2085 rc = (dir_inside_of(cwd, dir) >= 0);
2086 free(cwd);
2087 return rc;
2090 int is_empty_dir(const char *path)
2092 DIR *dir = opendir(path);
2093 struct dirent *e;
2094 int ret = 1;
2096 if (!dir)
2097 return 0;
2099 while ((e = readdir(dir)) != NULL)
2100 if (!is_dot_or_dotdot(e->d_name)) {
2101 ret = 0;
2102 break;
2105 closedir(dir);
2106 return ret;
2109 static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
2111 DIR *dir;
2112 struct dirent *e;
2113 int ret = 0, original_len = path->len, len, kept_down = 0;
2114 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
2115 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
2116 unsigned char submodule_head[20];
2118 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
2119 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
2120 /* Do not descend and nuke a nested git work tree. */
2121 if (kept_up)
2122 *kept_up = 1;
2123 return 0;
2126 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
2127 dir = opendir(path->buf);
2128 if (!dir) {
2129 if (errno == ENOENT)
2130 return keep_toplevel ? -1 : 0;
2131 else if (errno == EACCES && !keep_toplevel)
2133 * An empty dir could be removable even if it
2134 * is unreadable:
2136 return rmdir(path->buf);
2137 else
2138 return -1;
2140 if (path->buf[original_len - 1] != '/')
2141 strbuf_addch(path, '/');
2143 len = path->len;
2144 while ((e = readdir(dir)) != NULL) {
2145 struct stat st;
2146 if (is_dot_or_dotdot(e->d_name))
2147 continue;
2149 strbuf_setlen(path, len);
2150 strbuf_addstr(path, e->d_name);
2151 if (lstat(path->buf, &st)) {
2152 if (errno == ENOENT)
2154 * file disappeared, which is what we
2155 * wanted anyway
2157 continue;
2158 /* fall thru */
2159 } else if (S_ISDIR(st.st_mode)) {
2160 if (!remove_dir_recurse(path, flag, &kept_down))
2161 continue; /* happy */
2162 } else if (!only_empty &&
2163 (!unlink(path->buf) || errno == ENOENT)) {
2164 continue; /* happy, too */
2167 /* path too long, stat fails, or non-directory still exists */
2168 ret = -1;
2169 break;
2171 closedir(dir);
2173 strbuf_setlen(path, original_len);
2174 if (!ret && !keep_toplevel && !kept_down)
2175 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
2176 else if (kept_up)
2178 * report the uplevel that it is not an error that we
2179 * did not rmdir() our directory.
2181 *kept_up = !ret;
2182 return ret;
2185 int remove_dir_recursively(struct strbuf *path, int flag)
2187 return remove_dir_recurse(path, flag, NULL);
2190 void setup_standard_excludes(struct dir_struct *dir)
2192 const char *path;
2194 dir->exclude_per_dir = ".gitignore";
2196 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2197 if (!excludes_file)
2198 excludes_file = xdg_config_home("ignore");
2199 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
2200 add_excludes_from_file_1(dir, excludes_file,
2201 dir->untracked ? &dir->ss_excludes_file : NULL);
2203 /* per repository user preference */
2204 path = git_path("info/exclude");
2205 if (!access_or_warn(path, R_OK, 0))
2206 add_excludes_from_file_1(dir, path,
2207 dir->untracked ? &dir->ss_info_exclude : NULL);
2210 int remove_path(const char *name)
2212 char *slash;
2214 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)
2215 return -1;
2217 slash = strrchr(name, '/');
2218 if (slash) {
2219 char *dirs = xstrdup(name);
2220 slash = dirs + (slash - name);
2221 do {
2222 *slash = '\0';
2223 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
2224 free(dirs);
2226 return 0;
2230 * Frees memory within dir which was allocated for exclude lists and
2231 * the exclude_stack. Does not free dir itself.
2233 void clear_directory(struct dir_struct *dir)
2235 int i, j;
2236 struct exclude_list_group *group;
2237 struct exclude_list *el;
2238 struct exclude_stack *stk;
2240 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2241 group = &dir->exclude_list_group[i];
2242 for (j = 0; j < group->nr; j++) {
2243 el = &group->el[j];
2244 if (i == EXC_DIRS)
2245 free((char *)el->src);
2246 clear_exclude_list(el);
2248 free(group->el);
2251 stk = dir->exclude_stack;
2252 while (stk) {
2253 struct exclude_stack *prev = stk->prev;
2254 free(stk);
2255 stk = prev;
2257 strbuf_release(&dir->basebuf);
2260 struct ondisk_untracked_cache {
2261 struct stat_data info_exclude_stat;
2262 struct stat_data excludes_file_stat;
2263 uint32_t dir_flags;
2264 unsigned char info_exclude_sha1[20];
2265 unsigned char excludes_file_sha1[20];
2266 char exclude_per_dir[FLEX_ARRAY];
2269 #define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)
2271 struct write_data {
2272 int index; /* number of written untracked_cache_dir */
2273 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2274 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2275 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2276 struct strbuf out;
2277 struct strbuf sb_stat;
2278 struct strbuf sb_sha1;
2281 static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2283 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2284 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2285 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2286 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2287 to->sd_dev = htonl(from->sd_dev);
2288 to->sd_ino = htonl(from->sd_ino);
2289 to->sd_uid = htonl(from->sd_uid);
2290 to->sd_gid = htonl(from->sd_gid);
2291 to->sd_size = htonl(from->sd_size);
2294 static void write_one_dir(struct untracked_cache_dir *untracked,
2295 struct write_data *wd)
2297 struct stat_data stat_data;
2298 struct strbuf *out = &wd->out;
2299 unsigned char intbuf[16];
2300 unsigned int intlen, value;
2301 int i = wd->index++;
2304 * untracked_nr should be reset whenever valid is clear, but
2305 * for safety..
2307 if (!untracked->valid) {
2308 untracked->untracked_nr = 0;
2309 untracked->check_only = 0;
2312 if (untracked->check_only)
2313 ewah_set(wd->check_only, i);
2314 if (untracked->valid) {
2315 ewah_set(wd->valid, i);
2316 stat_data_to_disk(&stat_data, &untracked->stat_data);
2317 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2319 if (!is_null_sha1(untracked->exclude_sha1)) {
2320 ewah_set(wd->sha1_valid, i);
2321 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2324 intlen = encode_varint(untracked->untracked_nr, intbuf);
2325 strbuf_add(out, intbuf, intlen);
2327 /* skip non-recurse directories */
2328 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2329 if (untracked->dirs[i]->recurse)
2330 value++;
2331 intlen = encode_varint(value, intbuf);
2332 strbuf_add(out, intbuf, intlen);
2334 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2336 for (i = 0; i < untracked->untracked_nr; i++)
2337 strbuf_add(out, untracked->untracked[i],
2338 strlen(untracked->untracked[i]) + 1);
2340 for (i = 0; i < untracked->dirs_nr; i++)
2341 if (untracked->dirs[i]->recurse)
2342 write_one_dir(untracked->dirs[i], wd);
2345 void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2347 struct ondisk_untracked_cache *ouc;
2348 struct write_data wd;
2349 unsigned char varbuf[16];
2350 int len = 0, varint_len;
2351 if (untracked->exclude_per_dir)
2352 len = strlen(untracked->exclude_per_dir);
2353 ouc = xmalloc(sizeof(*ouc) + len + 1);
2354 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2355 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2356 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2357 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2358 ouc->dir_flags = htonl(untracked->dir_flags);
2359 memcpy(ouc->exclude_per_dir, untracked->exclude_per_dir, len + 1);
2361 varint_len = encode_varint(untracked->ident.len, varbuf);
2362 strbuf_add(out, varbuf, varint_len);
2363 strbuf_add(out, untracked->ident.buf, untracked->ident.len);
2365 strbuf_add(out, ouc, ouc_size(len));
2366 free(ouc);
2367 ouc = NULL;
2369 if (!untracked->root) {
2370 varint_len = encode_varint(0, varbuf);
2371 strbuf_add(out, varbuf, varint_len);
2372 return;
2375 wd.index = 0;
2376 wd.check_only = ewah_new();
2377 wd.valid = ewah_new();
2378 wd.sha1_valid = ewah_new();
2379 strbuf_init(&wd.out, 1024);
2380 strbuf_init(&wd.sb_stat, 1024);
2381 strbuf_init(&wd.sb_sha1, 1024);
2382 write_one_dir(untracked->root, &wd);
2384 varint_len = encode_varint(wd.index, varbuf);
2385 strbuf_add(out, varbuf, varint_len);
2386 strbuf_addbuf(out, &wd.out);
2387 ewah_serialize_strbuf(wd.valid, out);
2388 ewah_serialize_strbuf(wd.check_only, out);
2389 ewah_serialize_strbuf(wd.sha1_valid, out);
2390 strbuf_addbuf(out, &wd.sb_stat);
2391 strbuf_addbuf(out, &wd.sb_sha1);
2392 strbuf_addch(out, '\0'); /* safe guard for string lists */
2394 ewah_free(wd.valid);
2395 ewah_free(wd.check_only);
2396 ewah_free(wd.sha1_valid);
2397 strbuf_release(&wd.out);
2398 strbuf_release(&wd.sb_stat);
2399 strbuf_release(&wd.sb_sha1);
2402 static void free_untracked(struct untracked_cache_dir *ucd)
2404 int i;
2405 if (!ucd)
2406 return;
2407 for (i = 0; i < ucd->dirs_nr; i++)
2408 free_untracked(ucd->dirs[i]);
2409 for (i = 0; i < ucd->untracked_nr; i++)
2410 free(ucd->untracked[i]);
2411 free(ucd->untracked);
2412 free(ucd->dirs);
2413 free(ucd);
2416 void free_untracked_cache(struct untracked_cache *uc)
2418 if (uc)
2419 free_untracked(uc->root);
2420 free(uc);
2423 struct read_data {
2424 int index;
2425 struct untracked_cache_dir **ucd;
2426 struct ewah_bitmap *check_only;
2427 struct ewah_bitmap *valid;
2428 struct ewah_bitmap *sha1_valid;
2429 const unsigned char *data;
2430 const unsigned char *end;
2433 static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
2435 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
2436 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
2437 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
2438 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
2439 to->sd_dev = get_be32(&from->sd_dev);
2440 to->sd_ino = get_be32(&from->sd_ino);
2441 to->sd_uid = get_be32(&from->sd_uid);
2442 to->sd_gid = get_be32(&from->sd_gid);
2443 to->sd_size = get_be32(&from->sd_size);
2446 static int read_one_dir(struct untracked_cache_dir **untracked_,
2447 struct read_data *rd)
2449 struct untracked_cache_dir ud, *untracked;
2450 const unsigned char *next, *data = rd->data, *end = rd->end;
2451 unsigned int value;
2452 int i, len;
2454 memset(&ud, 0, sizeof(ud));
2456 next = data;
2457 value = decode_varint(&next);
2458 if (next > end)
2459 return -1;
2460 ud.recurse = 1;
2461 ud.untracked_alloc = value;
2462 ud.untracked_nr = value;
2463 if (ud.untracked_nr)
2464 ud.untracked = xmalloc(sizeof(*ud.untracked) * ud.untracked_nr);
2465 data = next;
2467 next = data;
2468 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2469 if (next > end)
2470 return -1;
2471 ud.dirs = xmalloc(sizeof(*ud.dirs) * ud.dirs_nr);
2472 data = next;
2474 len = strlen((const char *)data);
2475 next = data + len + 1;
2476 if (next > rd->end)
2477 return -1;
2478 *untracked_ = untracked = xmalloc(sizeof(*untracked) + len);
2479 memcpy(untracked, &ud, sizeof(ud));
2480 memcpy(untracked->name, data, len + 1);
2481 data = next;
2483 for (i = 0; i < untracked->untracked_nr; i++) {
2484 len = strlen((const char *)data);
2485 next = data + len + 1;
2486 if (next > rd->end)
2487 return -1;
2488 untracked->untracked[i] = xstrdup((const char*)data);
2489 data = next;
2492 rd->ucd[rd->index++] = untracked;
2493 rd->data = data;
2495 for (i = 0; i < untracked->dirs_nr; i++) {
2496 len = read_one_dir(untracked->dirs + i, rd);
2497 if (len < 0)
2498 return -1;
2500 return 0;
2503 static void set_check_only(size_t pos, void *cb)
2505 struct read_data *rd = cb;
2506 struct untracked_cache_dir *ud = rd->ucd[pos];
2507 ud->check_only = 1;
2510 static void read_stat(size_t pos, void *cb)
2512 struct read_data *rd = cb;
2513 struct untracked_cache_dir *ud = rd->ucd[pos];
2514 if (rd->data + sizeof(struct stat_data) > rd->end) {
2515 rd->data = rd->end + 1;
2516 return;
2518 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
2519 rd->data += sizeof(struct stat_data);
2520 ud->valid = 1;
2523 static void read_sha1(size_t pos, void *cb)
2525 struct read_data *rd = cb;
2526 struct untracked_cache_dir *ud = rd->ucd[pos];
2527 if (rd->data + 20 > rd->end) {
2528 rd->data = rd->end + 1;
2529 return;
2531 hashcpy(ud->exclude_sha1, rd->data);
2532 rd->data += 20;
2535 static void load_sha1_stat(struct sha1_stat *sha1_stat,
2536 const struct stat_data *stat,
2537 const unsigned char *sha1)
2539 stat_data_from_disk(&sha1_stat->stat, stat);
2540 hashcpy(sha1_stat->sha1, sha1);
2541 sha1_stat->valid = 1;
2544 struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2546 const struct ondisk_untracked_cache *ouc;
2547 struct untracked_cache *uc;
2548 struct read_data rd;
2549 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
2550 const char *ident;
2551 int ident_len, len;
2553 if (sz <= 1 || end[-1] != '\0')
2554 return NULL;
2555 end--;
2557 ident_len = decode_varint(&next);
2558 if (next + ident_len > end)
2559 return NULL;
2560 ident = (const char *)next;
2561 next += ident_len;
2563 ouc = (const struct ondisk_untracked_cache *)next;
2564 if (next + ouc_size(0) > end)
2565 return NULL;
2567 uc = xcalloc(1, sizeof(*uc));
2568 strbuf_init(&uc->ident, ident_len);
2569 strbuf_add(&uc->ident, ident, ident_len);
2570 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
2571 ouc->info_exclude_sha1);
2572 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
2573 ouc->excludes_file_sha1);
2574 uc->dir_flags = get_be32(&ouc->dir_flags);
2575 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
2576 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
2577 next += ouc_size(strlen(ouc->exclude_per_dir));
2578 if (next >= end)
2579 goto done2;
2581 len = decode_varint(&next);
2582 if (next > end || len == 0)
2583 goto done2;
2585 rd.valid = ewah_new();
2586 rd.check_only = ewah_new();
2587 rd.sha1_valid = ewah_new();
2588 rd.data = next;
2589 rd.end = end;
2590 rd.index = 0;
2591 rd.ucd = xmalloc(sizeof(*rd.ucd) * len);
2593 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2594 goto done;
2596 next = rd.data;
2597 len = ewah_read_mmap(rd.valid, next, end - next);
2598 if (len < 0)
2599 goto done;
2601 next += len;
2602 len = ewah_read_mmap(rd.check_only, next, end - next);
2603 if (len < 0)
2604 goto done;
2606 next += len;
2607 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2608 if (len < 0)
2609 goto done;
2611 ewah_each_bit(rd.check_only, set_check_only, &rd);
2612 rd.data = next + len;
2613 ewah_each_bit(rd.valid, read_stat, &rd);
2614 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2615 next = rd.data;
2617 done:
2618 free(rd.ucd);
2619 ewah_free(rd.valid);
2620 ewah_free(rd.check_only);
2621 ewah_free(rd.sha1_valid);
2622 done2:
2623 if (next != end) {
2624 free_untracked_cache(uc);
2625 uc = NULL;
2627 return uc;
2630 void untracked_cache_invalidate_path(struct index_state *istate,
2631 const char *path)
2633 const char *sep;
2634 struct untracked_cache_dir *d;
2635 if (!istate->untracked || !istate->untracked->root)
2636 return;
2637 sep = strrchr(path, '/');
2638 if (sep)
2639 d = lookup_untracked(istate->untracked,
2640 istate->untracked->root,
2641 path, sep - path);
2642 else
2643 d = istate->untracked->root;
2644 istate->untracked->dir_invalidated++;
2645 d->valid = 0;
2646 d->untracked_nr = 0;
2649 void untracked_cache_remove_from_index(struct index_state *istate,
2650 const char *path)
2652 untracked_cache_invalidate_path(istate, path);
2655 void untracked_cache_add_to_index(struct index_state *istate,
2656 const char *path)
2658 untracked_cache_invalidate_path(istate, path);