worktree: check if a submodule uses worktrees
[git/git.git] / dir.c
CommitLineData
453ec4bd
LT
1/*
2 * This handles recursive filename detection with exclude
3 * files, index knowledge etc..
4 *
95a68344
AS
5 * See Documentation/technical/api-directory-listing.txt
6 *
453ec4bd
LT
7 * Copyright (C) Linus Torvalds, 2005-2006
8 * Junio Hamano, 2005-2006
9 */
453ec4bd
LT
10#include "cache.h"
11#include "dir.h"
09595258 12#include "refs.h"
237ec6e4 13#include "wildmatch.h"
64acde94 14#include "pathspec.h"
dde843e7 15#include "utf8.h"
83c094ad
NTND
16#include "varint.h"
17#include "ewah/ewok.h"
453ec4bd 18
9fc42d60
LT
19struct path_simplify {
20 int len;
21 const char *path;
22};
23
defd7c7b
KB
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
cf7c6148
NTND
37/*
38 * Support data structure for our opendir/readdir/closedir wrappers
39 */
40struct cached_dir {
41 DIR *fdir;
42 struct untracked_cache_dir *untracked;
91a2288b
NTND
43 int nr_files;
44 int nr_dirs;
45
cf7c6148 46 struct dirent *de;
91a2288b
NTND
47 const char *file;
48 struct untracked_cache_dir *ucd;
cf7c6148
NTND
49};
50
defd7c7b 51static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0dcb8d7f 52 const char *path, int len, struct untracked_cache_dir *untracked,
09595258 53 int check_only, const struct path_simplify *simplify);
caa6b782 54static int get_dtype(struct dirent *de, const char *path, int len);
09595258 55
ba0897e6 56int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
57{
58 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
59}
60
ba0897e6 61int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
62{
63 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
64}
65
1f26ce61
CB
66int git_fnmatch(const struct pathspec_item *item,
67 const char *pattern, const char *string,
68 int prefix)
5d74762d 69{
5d74762d 70 if (prefix > 0) {
93d93537 71 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 72 return WM_NOMATCH;
5d74762d
NTND
73 pattern += prefix;
74 string += prefix;
75 }
bd30c2e4 76 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
77 int pattern_len = strlen(++pattern);
78 int string_len = strlen(string);
79 return string_len < pattern_len ||
93d93537
NTND
80 ps_strcmp(item, pattern,
81 string + string_len - pattern_len);
8c6abbcd 82 }
bd30c2e4 83 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
84 return wildmatch(pattern, string,
85 WM_PATHNAME |
86 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0),
87 NULL);
bd30c2e4
NTND
88 else
89 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f
NTND
90 return wildmatch(pattern, string,
91 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
92 NULL);
5d74762d
NTND
93}
94
0b6e56df
JH
95static int fnmatch_icase_mem(const char *pattern, int patternlen,
96 const char *string, int stringlen,
97 int flags)
98{
99 int match_status;
100 struct strbuf pat_buf = STRBUF_INIT;
101 struct strbuf str_buf = STRBUF_INIT;
102 const char *use_pat = pattern;
103 const char *use_str = string;
104
105 if (pattern[patternlen]) {
106 strbuf_add(&pat_buf, pattern, patternlen);
107 use_pat = pat_buf.buf;
108 }
109 if (string[stringlen]) {
110 strbuf_add(&str_buf, string, stringlen);
111 use_str = str_buf.buf;
112 }
113
f30366b2
JH
114 if (ignore_case)
115 flags |= WM_CASEFOLD;
116 match_status = wildmatch(use_pat, use_str, flags, NULL);
0b6e56df
JH
117
118 strbuf_release(&pat_buf);
119 strbuf_release(&str_buf);
120
121 return match_status;
122}
123
827f4d6c 124static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 125{
827f4d6c 126 int n;
4a085b16 127 size_t max = 0;
3c6a370b 128
93d93537
NTND
129 /*
130 * ":(icase)path" is treated as a pathspec full of
131 * wildcard. In other words, only prefix is considered common
132 * prefix. If the pathspec is abc/foo abc/bar, running in
133 * subdir xyz, the common prefix is still xyz, not xuz/abc as
134 * in non-:(icase).
135 */
5c6933d2
NTND
136 GUARD_PATHSPEC(pathspec,
137 PATHSPEC_FROMTOP |
138 PATHSPEC_MAXDEPTH |
bd30c2e4 139 PATHSPEC_LITERAL |
93d93537 140 PATHSPEC_GLOB |
ef79b1f8
NTND
141 PATHSPEC_ICASE |
142 PATHSPEC_EXCLUDE);
4a085b16 143
827f4d6c 144 for (n = 0; n < pathspec->nr; n++) {
93d93537 145 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
146 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
147 continue;
93d93537
NTND
148 if (pathspec->items[n].magic & PATHSPEC_ICASE)
149 item_len = pathspec->items[n].prefix;
150 else
151 item_len = pathspec->items[n].nowildcard_len;
152 while (i < item_len && (n == 0 || i < max)) {
827f4d6c
NTND
153 char c = pathspec->items[n].match[i];
154 if (c != pathspec->items[0].match[i])
4a085b16
JH
155 break;
156 if (c == '/')
157 len = i + 1;
827f4d6c 158 i++;
4a085b16 159 }
827f4d6c 160 if (n == 0 || len < max) {
4a085b16
JH
161 max = len;
162 if (!max)
163 break;
164 }
3c6a370b 165 }
4a085b16 166 return max;
3c6a370b
LT
167}
168
f950eb95
CB
169/*
170 * Returns a copy of the longest leading path common among all
171 * pathspecs.
172 */
827f4d6c 173char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
174{
175 unsigned long len = common_prefix_len(pathspec);
176
827f4d6c 177 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
178}
179
7327d3d1 180int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
1d8842d9 181{
4a085b16 182 size_t len;
1d8842d9
LT
183
184 /*
185 * Calculate common prefix for the pathspec, and
186 * use that to optimize the directory walk
187 */
4a085b16 188 len = common_prefix_len(pathspec);
1d8842d9
LT
189
190 /* Read the directory and prune it */
b3920bbd 191 read_directory(dir, pathspec->nr ? pathspec->_raw[0] : "", len, pathspec);
dba2e203 192 return len;
1d8842d9
LT
193}
194
bc96cc87
NTND
195int within_depth(const char *name, int namelen,
196 int depth, int max_depth)
197{
198 const char *cp = name, *cpe = name + namelen;
199
200 while (cp < cpe) {
201 if (*cp++ != '/')
202 continue;
203 depth++;
204 if (depth > max_depth)
205 return 0;
206 }
207 return 1;
208}
209
75a6315f
BW
210#define DO_MATCH_EXCLUDE (1<<0)
211#define DO_MATCH_DIRECTORY (1<<1)
212#define DO_MATCH_SUBMODULE (1<<2)
42b0874a 213
61cf2820
NTND
214/*
215 * Does 'match' match the given name?
216 * A match is found if
217 *
218 * (1) the 'match' string is leading directory of 'name', or
219 * (2) the 'match' string is a wildcard and matches 'name', or
220 * (3) the 'match' string is exactly the same as 'name'.
221 *
222 * and the return value tells which case it was.
223 *
224 * It returns 0 when there is no match.
225 */
226static int match_pathspec_item(const struct pathspec_item *item, int prefix,
42b0874a 227 const char *name, int namelen, unsigned flags)
61cf2820
NTND
228{
229 /* name/namelen has prefix cut off by caller */
230 const char *match = item->match + prefix;
231 int matchlen = item->len - prefix;
232
93d93537
NTND
233 /*
234 * The normal call pattern is:
235 * 1. prefix = common_prefix_len(ps);
236 * 2. prune something, or fill_directory
854b0959 237 * 3. match_pathspec()
93d93537
NTND
238 *
239 * 'prefix' at #1 may be shorter than the command's prefix and
240 * it's ok for #2 to match extra files. Those extras will be
241 * trimmed at #3.
242 *
243 * Suppose the pathspec is 'foo' and '../bar' running from
244 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
245 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
246 * user does not want XYZ/foo, only the "foo" part should be
247 * case-insensitive. We need to filter out XYZ/foo here. In
248 * other words, we do not trust the caller on comparing the
249 * prefix part when :(icase) is involved. We do exact
250 * comparison ourselves.
251 *
252 * Normally the caller (common_prefix_len() in fact) does
253 * _exact_ matching on name[-prefix+1..-1] and we do not need
254 * to check that part. Be defensive and check it anyway, in
255 * case common_prefix_len is changed, or a new caller is
256 * introduced that does not use common_prefix_len.
257 *
258 * If the penalty turns out too high when prefix is really
259 * long, maybe change it to
260 * strncmp(match, name, item->prefix - prefix)
261 */
262 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
263 strncmp(item->match, name - prefix, item->prefix))
264 return 0;
265
61cf2820
NTND
266 /* If the match was just the prefix, we matched */
267 if (!*match)
268 return MATCHED_RECURSIVELY;
269
93d93537 270 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
271 if (matchlen == namelen)
272 return MATCHED_EXACTLY;
273
274 if (match[matchlen-1] == '/' || name[matchlen] == '/')
275 return MATCHED_RECURSIVELY;
68690fdd
NTND
276 } else if ((flags & DO_MATCH_DIRECTORY) &&
277 match[matchlen - 1] == '/' &&
278 namelen == matchlen - 1 &&
279 !ps_strncmp(item, match, name, namelen))
280 return MATCHED_EXACTLY;
61cf2820 281
5d74762d 282 if (item->nowildcard_len < item->len &&
bd30c2e4 283 !git_fnmatch(item, match, name,
8c6abbcd 284 item->nowildcard_len - prefix))
61cf2820
NTND
285 return MATCHED_FNMATCH;
286
75a6315f
BW
287 /* Perform checks to see if "name" is a super set of the pathspec */
288 if (flags & DO_MATCH_SUBMODULE) {
289 /* name is a literal prefix of the pathspec */
290 if ((namelen < matchlen) &&
291 (match[namelen] == '/') &&
292 !ps_strncmp(item, match, name, namelen))
293 return MATCHED_RECURSIVELY;
294
295 /* name" doesn't match up to the first wild character */
296 if (item->nowildcard_len < item->len &&
297 ps_strncmp(item, match, name,
298 item->nowildcard_len - prefix))
299 return 0;
300
301 /*
302 * Here is where we would perform a wildmatch to check if
303 * "name" can be matched as a directory (or a prefix) against
304 * the pathspec. Since wildmatch doesn't have this capability
305 * at the present we have to punt and say that it is a match,
306 * potentially returning a false positive
307 * The submodules themselves will be able to perform more
308 * accurate matching to determine if the pathspec matches.
309 */
310 return MATCHED_RECURSIVELY;
311 }
312
61cf2820
NTND
313 return 0;
314}
315
316/*
52ed1894
AS
317 * Given a name and a list of pathspecs, returns the nature of the
318 * closest (i.e. most specific) match of the name to any of the
319 * pathspecs.
320 *
321 * The caller typically calls this multiple times with the same
322 * pathspec and seen[] array but with different name/namelen
323 * (e.g. entries from the index) and is interested in seeing if and
324 * how each pathspec matches all the names it calls this function
325 * with. A mark is left in the seen[] array for each pathspec element
326 * indicating the closest type of match that element achieved, so if
327 * seen[n] remains zero after multiple invocations, that means the nth
328 * pathspec did not match any names, which could indicate that the
329 * user mistyped the nth pathspec.
61cf2820 330 */
854b0959
NTND
331static int do_match_pathspec(const struct pathspec *ps,
332 const char *name, int namelen,
333 int prefix, char *seen,
42b0874a 334 unsigned flags)
61cf2820 335{
42b0874a 336 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 337
5c6933d2
NTND
338 GUARD_PATHSPEC(ps,
339 PATHSPEC_FROMTOP |
340 PATHSPEC_MAXDEPTH |
bd30c2e4 341 PATHSPEC_LITERAL |
93d93537 342 PATHSPEC_GLOB |
ef79b1f8
NTND
343 PATHSPEC_ICASE |
344 PATHSPEC_EXCLUDE);
8f4f8f45 345
61cf2820 346 if (!ps->nr) {
6330a171
NTND
347 if (!ps->recursive ||
348 !(ps->magic & PATHSPEC_MAXDEPTH) ||
349 ps->max_depth == -1)
61cf2820
NTND
350 return MATCHED_RECURSIVELY;
351
352 if (within_depth(name, namelen, 0, ps->max_depth))
353 return MATCHED_EXACTLY;
354 else
355 return 0;
356 }
357
358 name += prefix;
359 namelen -= prefix;
360
361 for (i = ps->nr - 1; i >= 0; i--) {
362 int how;
ef79b1f8
NTND
363
364 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
365 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
366 continue;
367
61cf2820
NTND
368 if (seen && seen[i] == MATCHED_EXACTLY)
369 continue;
ef79b1f8
NTND
370 /*
371 * Make exclude patterns optional and never report
372 * "pathspec ':(exclude)foo' matches no files"
373 */
374 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
375 seen[i] = MATCHED_FNMATCH;
42b0874a
NTND
376 how = match_pathspec_item(ps->items+i, prefix, name,
377 namelen, flags);
6330a171
NTND
378 if (ps->recursive &&
379 (ps->magic & PATHSPEC_MAXDEPTH) &&
380 ps->max_depth != -1 &&
61cf2820
NTND
381 how && how != MATCHED_FNMATCH) {
382 int len = ps->items[i].len;
383 if (name[len] == '/')
384 len++;
385 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
386 how = MATCHED_EXACTLY;
387 else
388 how = 0;
389 }
390 if (how) {
391 if (retval < how)
392 retval = how;
393 if (seen && seen[i] < how)
394 seen[i] = how;
395 }
396 }
397 return retval;
398}
399
854b0959
NTND
400int match_pathspec(const struct pathspec *ps,
401 const char *name, int namelen,
ae8d0824 402 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
403{
404 int positive, negative;
ae8d0824 405 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
42b0874a
NTND
406 positive = do_match_pathspec(ps, name, namelen,
407 prefix, seen, flags);
ef79b1f8
NTND
408 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
409 return positive;
42b0874a
NTND
410 negative = do_match_pathspec(ps, name, namelen,
411 prefix, seen,
412 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
413 return negative ? 0 : positive;
414}
415
75a6315f
BW
416/**
417 * Check if a submodule is a superset of the pathspec
418 */
419int submodule_path_match(const struct pathspec *ps,
420 const char *submodule_name,
421 char *seen)
422{
423 int matched = do_match_pathspec(ps, submodule_name,
424 strlen(submodule_name),
425 0, seen,
426 DO_MATCH_DIRECTORY |
427 DO_MATCH_SUBMODULE);
428 return matched;
429}
430
777c55a6
JH
431int report_path_error(const char *ps_matched,
432 const struct pathspec *pathspec,
433 const char *prefix)
434{
435 /*
436 * Make sure all pathspec matched; otherwise it is an error.
437 */
777c55a6
JH
438 int num, errors = 0;
439 for (num = 0; num < pathspec->nr; num++) {
440 int other, found_dup;
441
442 if (ps_matched[num])
443 continue;
444 /*
445 * The caller might have fed identical pathspec
446 * twice. Do not barf on such a mistake.
447 * FIXME: parse_pathspec should have eliminated
448 * duplicate pathspec.
449 */
450 for (found_dup = other = 0;
451 !found_dup && other < pathspec->nr;
452 other++) {
453 if (other == num || !ps_matched[other])
454 continue;
455 if (!strcmp(pathspec->items[other].original,
456 pathspec->items[num].original))
457 /*
458 * Ok, we have a match already.
459 */
460 found_dup = 1;
461 }
462 if (found_dup)
463 continue;
464
465 error("pathspec '%s' did not match any file(s) known to git.",
466 pathspec->items[num].original);
467 errors++;
468 }
777c55a6
JH
469 return errors;
470}
471
fcd631ed
NTND
472/*
473 * Return the length of the "simple" part of a path match limiter.
474 */
87323bda 475int simple_length(const char *match)
fcd631ed
NTND
476{
477 int len = -1;
478
479 for (;;) {
480 unsigned char c = *match++;
481 len++;
482 if (c == '\0' || is_glob_special(c))
483 return len;
484 }
485}
486
87323bda 487int no_wildcard(const char *string)
68492fc7 488{
fcd631ed 489 return string[simple_length(string)] == '\0';
68492fc7
LK
490}
491
82dce998
NTND
492void parse_exclude_pattern(const char **pattern,
493 int *patternlen,
f8708998 494 unsigned *flags,
82dce998 495 int *nowildcardlen)
84460eec
NTND
496{
497 const char *p = *pattern;
498 size_t i, len;
499
500 *flags = 0;
501 if (*p == '!') {
502 *flags |= EXC_FLAG_NEGATIVE;
503 p++;
504 }
505 len = strlen(p);
506 if (len && p[len - 1] == '/') {
507 len--;
508 *flags |= EXC_FLAG_MUSTBEDIR;
509 }
510 for (i = 0; i < len; i++) {
511 if (p[i] == '/')
512 break;
513 }
514 if (i == len)
515 *flags |= EXC_FLAG_NODIR;
516 *nowildcardlen = simple_length(p);
517 /*
518 * we should have excluded the trailing slash from 'p' too,
519 * but that's one more allocation. Instead just make sure
520 * nowildcardlen does not exceed real patternlen
521 */
522 if (*nowildcardlen > len)
523 *nowildcardlen = len;
524 if (*p == '*' && no_wildcard(p + 1))
525 *flags |= EXC_FLAG_ENDSWITH;
526 *pattern = p;
527 *patternlen = len;
528}
529
453ec4bd 530void add_exclude(const char *string, const char *base,
c04318e4 531 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 532{
d6b8fc30 533 struct exclude *x;
84460eec 534 int patternlen;
f8708998 535 unsigned flags;
84460eec 536 int nowildcardlen;
453ec4bd 537
84460eec
NTND
538 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
539 if (flags & EXC_FLAG_MUSTBEDIR) {
96ffc06f 540 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
d6b8fc30
JH
541 } else {
542 x = xmalloc(sizeof(*x));
543 x->pattern = string;
544 }
84460eec
NTND
545 x->patternlen = patternlen;
546 x->nowildcardlen = nowildcardlen;
453ec4bd
LT
547 x->base = base;
548 x->baselen = baselen;
d6b8fc30 549 x->flags = flags;
c04318e4 550 x->srcpos = srcpos;
840fc334
AS
551 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
552 el->excludes[el->nr++] = x;
c04318e4 553 x->el = el;
453ec4bd
LT
554}
555
55fe6f51
NTND
556static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
557 struct sha1_stat *sha1_stat)
c28b3d6e
NTND
558{
559 int pos, len;
560 unsigned long sz;
561 enum object_type type;
562 void *data;
c28b3d6e
NTND
563
564 len = strlen(path);
71261027 565 pos = cache_name_pos(path, len);
c28b3d6e
NTND
566 if (pos < 0)
567 return NULL;
71261027 568 if (!ce_skip_worktree(active_cache[pos]))
c28b3d6e 569 return NULL;
99d1a986 570 data = read_sha1_file(active_cache[pos]->oid.hash, &type, &sz);
c28b3d6e
NTND
571 if (!data || type != OBJ_BLOB) {
572 free(data);
573 return NULL;
574 }
575 *size = xsize_t(sz);
55fe6f51
NTND
576 if (sha1_stat) {
577 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
99d1a986 578 hashcpy(sha1_stat->sha1, active_cache[pos]->oid.hash);
55fe6f51 579 }
c28b3d6e
NTND
580 return data;
581}
582
f6198812
AS
583/*
584 * Frees memory within el which was allocated for exclude patterns and
585 * the file buffer. Does not free el itself.
586 */
587void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
588{
589 int i;
590
5cee3493 591 for (i = 0; i < el->nr; i++)
0fd0e241
NTND
592 free(el->excludes[i]);
593 free(el->excludes);
c082df24 594 free(el->filebuf);
0fd0e241 595
2653a8c6 596 memset(el, 0, sizeof(*el));
0fd0e241
NTND
597}
598
7e2e4b37 599static void trim_trailing_spaces(char *buf)
16402b99 600{
e61a6c1d
PB
601 char *p, *last_space = NULL;
602
603 for (p = buf; *p; p++)
604 switch (*p) {
605 case ' ':
606 if (!last_space)
607 last_space = p;
608 break;
609 case '\\':
610 p++;
611 if (!*p)
612 return;
613 /* fallthrough */
614 default:
615 last_space = NULL;
616 }
617
618 if (last_space)
619 *last_space = '\0';
16402b99
NTND
620}
621
0dcb8d7f
NTND
622/*
623 * Given a subdirectory name and "dir" of the current directory,
624 * search the subdir in "dir" and return it, or create a new one if it
625 * does not exist in "dir".
626 *
627 * If "name" has the trailing slash, it'll be excluded in the search.
628 */
629static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
630 struct untracked_cache_dir *dir,
631 const char *name, int len)
632{
633 int first, last;
634 struct untracked_cache_dir *d;
635 if (!dir)
636 return NULL;
637 if (len && name[len - 1] == '/')
638 len--;
639 first = 0;
640 last = dir->dirs_nr;
641 while (last > first) {
642 int cmp, next = (last + first) >> 1;
643 d = dir->dirs[next];
644 cmp = strncmp(name, d->name, len);
645 if (!cmp && strlen(d->name) > len)
646 cmp = -1;
647 if (!cmp)
648 return d;
649 if (cmp < 0) {
650 last = next;
651 continue;
652 }
653 first = next+1;
654 }
655
656 uc->dir_created++;
96ffc06f 657 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
658
659 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
660 memmove(dir->dirs + first + 1, dir->dirs + first,
661 (dir->dirs_nr - first) * sizeof(*dir->dirs));
662 dir->dirs_nr++;
663 dir->dirs[first] = d;
664 return d;
665}
666
ccad261f
NTND
667static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
668{
669 int i;
670 dir->valid = 0;
671 dir->untracked_nr = 0;
672 for (i = 0; i < dir->dirs_nr; i++)
673 do_invalidate_gitignore(dir->dirs[i]);
674}
675
676static void invalidate_gitignore(struct untracked_cache *uc,
677 struct untracked_cache_dir *dir)
678{
679 uc->gitignore_invalidated++;
680 do_invalidate_gitignore(dir);
681}
682
91a2288b
NTND
683static void invalidate_directory(struct untracked_cache *uc,
684 struct untracked_cache_dir *dir)
685{
26cb0182 686 int i;
91a2288b
NTND
687 uc->dir_invalidated++;
688 dir->valid = 0;
689 dir->untracked_nr = 0;
26cb0182
NTND
690 for (i = 0; i < dir->dirs_nr; i++)
691 dir->dirs[i]->recurse = 0;
91a2288b
NTND
692}
693
55fe6f51
NTND
694/*
695 * Given a file with name "fname", read it (either from disk, or from
696 * the index if "check_index" is non-zero), parse it and store the
697 * exclude rules in "el".
698 *
699 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
700 * stat data from disk (only valid if add_excludes returns zero). If
701 * ss_valid is non-zero, "ss" must contain good value as input.
702 */
703static int add_excludes(const char *fname, const char *base, int baselen,
704 struct exclude_list *el, int check_index,
705 struct sha1_stat *sha1_stat)
453ec4bd 706{
c470701a 707 struct stat st;
c04318e4 708 int fd, i, lineno = 1;
9d14017a 709 size_t size = 0;
453ec4bd
LT
710 char *buf, *entry;
711
712 fd = open(fname, O_RDONLY);
c28b3d6e 713 if (fd < 0 || fstat(fd, &st) < 0) {
69660731 714 if (errno != ENOENT)
55b38a48 715 warn_on_inaccessible(fname);
c28b3d6e
NTND
716 if (0 <= fd)
717 close(fd);
718 if (!check_index ||
55fe6f51 719 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
c28b3d6e 720 return -1;
45d76f17
NTND
721 if (size == 0) {
722 free(buf);
723 return 0;
724 }
725 if (buf[size-1] != '\n') {
50a6c8ef 726 buf = xrealloc(buf, st_add(size, 1));
45d76f17
NTND
727 buf[size++] = '\n';
728 }
d961baa8 729 } else {
c28b3d6e
NTND
730 size = xsize_t(st.st_size);
731 if (size == 0) {
55fe6f51
NTND
732 if (sha1_stat) {
733 fill_stat_data(&sha1_stat->stat, &st);
734 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
735 sha1_stat->valid = 1;
736 }
c28b3d6e
NTND
737 close(fd);
738 return 0;
739 }
3733e694 740 buf = xmallocz(size);
c28b3d6e 741 if (read_in_full(fd, buf, size) != size) {
45d76f17 742 free(buf);
c28b3d6e
NTND
743 close(fd);
744 return -1;
745 }
45d76f17 746 buf[size++] = '\n';
c28b3d6e 747 close(fd);
55fe6f51
NTND
748 if (sha1_stat) {
749 int pos;
750 if (sha1_stat->valid &&
ed4efab1 751 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st))
55fe6f51
NTND
752 ; /* no content change, ss->sha1 still good */
753 else if (check_index &&
754 (pos = cache_name_pos(fname, strlen(fname))) >= 0 &&
755 !ce_stage(active_cache[pos]) &&
756 ce_uptodate(active_cache[pos]) &&
757 !would_convert_to_git(fname))
99d1a986 758 hashcpy(sha1_stat->sha1,
759 active_cache[pos]->oid.hash);
55fe6f51
NTND
760 else
761 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
762 fill_stat_data(&sha1_stat->stat, &st);
763 sha1_stat->valid = 1;
764 }
6ba78238 765 }
453ec4bd 766
c082df24 767 el->filebuf = buf;
245e1c19 768
dde843e7
JH
769 if (skip_utf8_bom(&buf, size))
770 size -= buf - el->filebuf;
771
453ec4bd 772 entry = buf;
245e1c19 773
45d76f17
NTND
774 for (i = 0; i < size; i++) {
775 if (buf[i] == '\n') {
453ec4bd
LT
776 if (entry != buf + i && entry[0] != '#') {
777 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 778 trim_trailing_spaces(entry);
c04318e4 779 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 780 }
c04318e4 781 lineno++;
453ec4bd
LT
782 entry = buf + i + 1;
783 }
784 }
785 return 0;
453ec4bd
LT
786}
787
55fe6f51
NTND
788int add_excludes_from_file_to_list(const char *fname, const char *base,
789 int baselen, struct exclude_list *el,
790 int check_index)
791{
792 return add_excludes(fname, base, baselen, el, check_index, NULL);
793}
794
c04318e4
AS
795struct exclude_list *add_exclude_list(struct dir_struct *dir,
796 int group_type, const char *src)
c082df24
AS
797{
798 struct exclude_list *el;
799 struct exclude_list_group *group;
800
801 group = &dir->exclude_list_group[group_type];
802 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
803 el = &group->el[group->nr++];
804 memset(el, 0, sizeof(*el));
c04318e4 805 el->src = src;
c082df24
AS
806 return el;
807}
808
809/*
810 * Used to set up core.excludesfile and .git/info/exclude lists.
811 */
0dcb8d7f
NTND
812static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
813 struct sha1_stat *sha1_stat)
453ec4bd 814{
c082df24 815 struct exclude_list *el;
ccad261f
NTND
816 /*
817 * catch setup_standard_excludes() that's called before
818 * dir->untracked is assigned. That function behaves
819 * differently when dir->untracked is non-NULL.
820 */
821 if (!dir->untracked)
822 dir->unmanaged_exclude_files++;
c04318e4 823 el = add_exclude_list(dir, EXC_FILE, fname);
0dcb8d7f 824 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0)
453ec4bd
LT
825 die("cannot use %s as an exclude file", fname);
826}
827
0dcb8d7f
NTND
828void add_excludes_from_file(struct dir_struct *dir, const char *fname)
829{
ccad261f 830 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
831 add_excludes_from_file_1(dir, fname, NULL);
832}
833
82dce998
NTND
834int match_basename(const char *basename, int basenamelen,
835 const char *pattern, int prefix, int patternlen,
f8708998 836 unsigned flags)
593cb880
NTND
837{
838 if (prefix == patternlen) {
0b6e56df 839 if (patternlen == basenamelen &&
ba0897e6 840 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
841 return 1;
842 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 843 /* "*literal" matching against "fooliteral" */
593cb880 844 if (patternlen - 1 <= basenamelen &&
ba0897e6 845 !fspathncmp(pattern + 1,
0b6e56df
JH
846 basename + basenamelen - (patternlen - 1),
847 patternlen - 1))
593cb880
NTND
848 return 1;
849 } else {
0b6e56df
JH
850 if (fnmatch_icase_mem(pattern, patternlen,
851 basename, basenamelen,
852 0) == 0)
593cb880
NTND
853 return 1;
854 }
855 return 0;
856}
857
82dce998
NTND
858int match_pathname(const char *pathname, int pathlen,
859 const char *base, int baselen,
860 const char *pattern, int prefix, int patternlen,
f8708998 861 unsigned flags)
b5592632
NTND
862{
863 const char *name;
864 int namelen;
865
866 /*
867 * match with FNM_PATHNAME; the pattern has base implicitly
868 * in front of it.
869 */
870 if (*pattern == '/') {
871 pattern++;
982ac873 872 patternlen--;
b5592632
NTND
873 prefix--;
874 }
875
876 /*
877 * baselen does not count the trailing slash. base[] may or
878 * may not end with a trailing slash though.
879 */
880 if (pathlen < baselen + 1 ||
881 (baselen && pathname[baselen] != '/') ||
ba0897e6 882 fspathncmp(pathname, base, baselen))
b5592632
NTND
883 return 0;
884
885 namelen = baselen ? pathlen - baselen - 1 : pathlen;
886 name = pathname + pathlen - namelen;
887
888 if (prefix) {
889 /*
890 * if the non-wildcard part is longer than the
891 * remaining pathname, surely it cannot match.
892 */
893 if (prefix > namelen)
894 return 0;
895
ba0897e6 896 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
897 return 0;
898 pattern += prefix;
ab3aebc1 899 patternlen -= prefix;
b5592632
NTND
900 name += prefix;
901 namelen -= prefix;
ab3aebc1
JK
902
903 /*
904 * If the whole pattern did not have a wildcard,
905 * then our prefix match is all we need; we
906 * do not need to call fnmatch at all.
907 */
5cee3493 908 if (!patternlen && !namelen)
ab3aebc1 909 return 1;
b5592632
NTND
910 }
911
ab3aebc1
JK
912 return fnmatch_icase_mem(pattern, patternlen,
913 name, namelen,
f30366b2 914 WM_PATHNAME) == 0;
b5592632
NTND
915}
916
578cd7c3
AS
917/*
918 * Scan the given exclude list in reverse to see whether pathname
919 * should be ignored. The first match (i.e. the last on the list), if
920 * any, determines the fate. Returns the exclude_list element which
921 * matched, or NULL for undecided.
453ec4bd 922 */
578cd7c3
AS
923static struct exclude *last_exclude_matching_from_list(const char *pathname,
924 int pathlen,
925 const char *basename,
926 int *dtype,
927 struct exclude_list *el)
453ec4bd 928{
e6efecc4 929 struct exclude *exc = NULL; /* undecided */
5cee3493 930 int i;
453ec4bd 931
35a94d44 932 if (!el->nr)
578cd7c3 933 return NULL; /* undefined */
d6b8fc30 934
35a94d44
NTND
935 for (i = el->nr - 1; 0 <= i; i--) {
936 struct exclude *x = el->excludes[i];
b5592632 937 const char *exclude = x->pattern;
b5592632 938 int prefix = x->nowildcardlen;
35a94d44
NTND
939
940 if (x->flags & EXC_FLAG_MUSTBEDIR) {
941 if (*dtype == DT_UNKNOWN)
942 *dtype = get_dtype(NULL, pathname, pathlen);
943 if (*dtype != DT_DIR)
944 continue;
945 }
d6b8fc30 946
35a94d44 947 if (x->flags & EXC_FLAG_NODIR) {
593cb880
NTND
948 if (match_basename(basename,
949 pathlen - (basename - pathname),
950 exclude, prefix, x->patternlen,
e6efecc4
NTND
951 x->flags)) {
952 exc = x;
953 break;
954 }
35a94d44
NTND
955 continue;
956 }
957
b5592632
NTND
958 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
959 if (match_pathname(pathname, pathlen,
960 x->base, x->baselen ? x->baselen - 1 : 0,
e6efecc4
NTND
961 exclude, prefix, x->patternlen, x->flags)) {
962 exc = x;
963 break;
964 }
453ec4bd 965 }
e6efecc4 966 return exc;
578cd7c3
AS
967}
968
969/*
970 * Scan the list and let the last match determine the fate.
971 * Return 1 for exclude, 0 for include and -1 for undecided.
972 */
973int is_excluded_from_list(const char *pathname,
974 int pathlen, const char *basename, int *dtype,
975 struct exclude_list *el)
976{
977 struct exclude *exclude;
978 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);
979 if (exclude)
980 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
981 return -1; /* undecided */
982}
983
46aa2f95
KB
984static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
985 const char *pathname, int pathlen, const char *basename,
986 int *dtype_p)
987{
988 int i, j;
989 struct exclude_list_group *group;
990 struct exclude *exclude;
991 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
992 group = &dir->exclude_list_group[i];
993 for (j = group->nr - 1; j >= 0; j--) {
994 exclude = last_exclude_matching_from_list(
995 pathname, pathlen, basename, dtype_p,
996 &group->el[j]);
997 if (exclude)
998 return exclude;
999 }
1000 }
1001 return NULL;
1002}
1003
6cd5c582
KB
1004/*
1005 * Loads the per-directory exclude list for the substring of base
1006 * which has a char length of baselen.
1007 */
1008static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
1009{
1010 struct exclude_list_group *group;
1011 struct exclude_list *el;
1012 struct exclude_stack *stk = NULL;
0dcb8d7f 1013 struct untracked_cache_dir *untracked;
6cd5c582
KB
1014 int current;
1015
6cd5c582
KB
1016 group = &dir->exclude_list_group[EXC_DIRS];
1017
d961baa8
NTND
1018 /*
1019 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 1020 * which originate from directories not in the prefix of the
d961baa8
NTND
1021 * path being checked.
1022 */
6cd5c582
KB
1023 while ((stk = dir->exclude_stack) != NULL) {
1024 if (stk->baselen <= baselen &&
aceb9429 1025 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
1026 break;
1027 el = &group->el[dir->exclude_stack->exclude_ix];
1028 dir->exclude_stack = stk->prev;
95c6f271 1029 dir->exclude = NULL;
aceb9429 1030 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
1031 clear_exclude_list(el);
1032 free(stk);
1033 group->nr--;
1034 }
1035
95c6f271
KB
1036 /* Skip traversing into sub directories if the parent is excluded */
1037 if (dir->exclude)
1038 return;
1039
aceb9429
NTND
1040 /*
1041 * Lazy initialization. All call sites currently just
1042 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1043 * them seems lots of work for little benefit.
1044 */
1045 if (!dir->basebuf.buf)
1046 strbuf_init(&dir->basebuf, PATH_MAX);
1047
6cd5c582
KB
1048 /* Read from the parent directories and push them down. */
1049 current = stk ? stk->baselen : -1;
aceb9429 1050 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1051 if (dir->untracked)
1052 untracked = stk ? stk->ucd : dir->untracked->root;
1053 else
1054 untracked = NULL;
1055
6cd5c582 1056 while (current < baselen) {
6cd5c582 1057 const char *cp;
0dcb8d7f 1058 struct sha1_stat sha1_stat;
6cd5c582 1059
03e11a71 1060 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1061 if (current < 0) {
1062 cp = base;
1063 current = 0;
d961baa8 1064 } else {
6cd5c582
KB
1065 cp = strchr(base + current + 1, '/');
1066 if (!cp)
1067 die("oops in prep_exclude");
1068 cp++;
0dcb8d7f
NTND
1069 untracked =
1070 lookup_untracked(dir->untracked, untracked,
1071 base + current,
1072 cp - base - current);
6cd5c582
KB
1073 }
1074 stk->prev = dir->exclude_stack;
1075 stk->baselen = cp - base;
95c6f271 1076 stk->exclude_ix = group->nr;
0dcb8d7f 1077 stk->ucd = untracked;
95c6f271 1078 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1079 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1080 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1081
1082 /* Abort if the directory is excluded */
1083 if (stk->baselen) {
1084 int dt = DT_DIR;
aceb9429 1085 dir->basebuf.buf[stk->baselen - 1] = 0;
95c6f271 1086 dir->exclude = last_exclude_matching_from_lists(dir,
aceb9429
NTND
1087 dir->basebuf.buf, stk->baselen - 1,
1088 dir->basebuf.buf + current, &dt);
1089 dir->basebuf.buf[stk->baselen - 1] = '/';
c3c327de
KB
1090 if (dir->exclude &&
1091 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1092 dir->exclude = NULL;
95c6f271 1093 if (dir->exclude) {
95c6f271
KB
1094 dir->exclude_stack = stk;
1095 return;
1096 }
1097 }
1098
aceb9429 1099 /* Try to read per-directory file */
0dcb8d7f
NTND
1100 hashclr(sha1_stat.sha1);
1101 sha1_stat.valid = 0;
27b099ae
NTND
1102 if (dir->exclude_per_dir &&
1103 /*
1104 * If we know that no files have been added in
1105 * this directory (i.e. valid_cached_dir() has
1106 * been executed and set untracked->valid) ..
1107 */
1108 (!untracked || !untracked->valid ||
1109 /*
1110 * .. and .gitignore does not exist before
7687252f
DT
1111 * (i.e. null exclude_sha1). Then we can skip
1112 * loading .gitignore, which would result in
1113 * ENOENT anyway.
27b099ae
NTND
1114 */
1115 !is_null_sha1(untracked->exclude_sha1))) {
95c6f271
KB
1116 /*
1117 * dir->basebuf gets reused by the traversal, but we
1118 * need fname to remain unchanged to ensure the src
1119 * member of each struct exclude correctly
1120 * back-references its source file. Other invocations
1121 * of add_exclude_list provide stable strings, so we
aceb9429 1122 * strbuf_detach() and free() here in the caller.
95c6f271 1123 */
aceb9429
NTND
1124 struct strbuf sb = STRBUF_INIT;
1125 strbuf_addbuf(&sb, &dir->basebuf);
1126 strbuf_addstr(&sb, dir->exclude_per_dir);
1127 el->src = strbuf_detach(&sb, NULL);
0dcb8d7f
NTND
1128 add_excludes(el->src, el->src, stk->baselen, el, 1,
1129 untracked ? &sha1_stat : NULL);
1130 }
5ebf79ad
NTND
1131 /*
1132 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1133 * will first be called in valid_cached_dir() then maybe many
1134 * times more in last_exclude_matching(). When the cache is
1135 * used, last_exclude_matching() will not be called and
1136 * reading .gitignore content will be a waste.
1137 *
1138 * So when it's called by valid_cached_dir() and we can get
1139 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1140 * modified on work tree), we could delay reading the
1141 * .gitignore content until we absolutely need it in
1142 * last_exclude_matching(). Be careful about ignore rule
1143 * order, though, if you do that.
1144 */
1145 if (untracked &&
1146 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1147 invalidate_gitignore(dir->untracked, untracked);
0dcb8d7f 1148 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
95c6f271 1149 }
6cd5c582
KB
1150 dir->exclude_stack = stk;
1151 current = stk->baselen;
1152 }
aceb9429 1153 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1154}
1155
f4cd69a6
AS
1156/*
1157 * Loads the exclude lists for the directory containing pathname, then
1158 * scans all exclude lists to determine whether pathname is excluded.
1159 * Returns the exclude_list element which matched, or NULL for
1160 * undecided.
1161 */
b07bc8c8 1162struct exclude *last_exclude_matching(struct dir_struct *dir,
f4cd69a6
AS
1163 const char *pathname,
1164 int *dtype_p)
453ec4bd
LT
1165{
1166 int pathlen = strlen(pathname);
68492fc7
LK
1167 const char *basename = strrchr(pathname, '/');
1168 basename = (basename) ? basename+1 : pathname;
453ec4bd 1169
63d285c8 1170 prep_exclude(dir, pathname, basename-pathname);
c082df24 1171
95c6f271
KB
1172 if (dir->exclude)
1173 return dir->exclude;
1174
46aa2f95
KB
1175 return last_exclude_matching_from_lists(dir, pathname, pathlen,
1176 basename, dtype_p);
f4cd69a6
AS
1177}
1178
1179/*
1180 * Loads the exclude lists for the directory containing pathname, then
1181 * scans all exclude lists to determine whether pathname is excluded.
1182 * Returns 1 if true, otherwise 0.
1183 */
b07bc8c8 1184int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
f4cd69a6
AS
1185{
1186 struct exclude *exclude =
1187 last_exclude_matching(dir, pathname, dtype_p);
1188 if (exclude)
1189 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1190 return 0;
1191}
1192
f3fa1838
JH
1193static struct dir_entry *dir_entry_new(const char *pathname, int len)
1194{
453ec4bd
LT
1195 struct dir_entry *ent;
1196
96ffc06f 1197 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1198 ent->len = len;
4d06f8ac 1199 return ent;
453ec4bd
LT
1200}
1201
159b3212 1202static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
6815e569 1203{
ebbd7439 1204 if (cache_file_exists(pathname, len, ignore_case))
6815e569
JK
1205 return NULL;
1206
25fd2f7a 1207 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1208 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1209}
1210
108da0db 1211struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)
2abd31b0 1212{
6e4f981f 1213 if (!cache_name_is_other(pathname, len))
2abd31b0
JK
1214 return NULL;
1215
25fd2f7a 1216 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1217 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1218}
1219
09595258
LT
1220enum exist_status {
1221 index_nonexistent = 0,
1222 index_directory,
4b05548f 1223 index_gitdir
09595258
LT
1224};
1225
5102c617 1226/*
71261027 1227 * Do not use the alphabetically sorted index to look up
5102c617 1228 * the directory name; instead, use the case insensitive
ebbd7439 1229 * directory hash.
5102c617
JJ
1230 */
1231static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
1232{
41284eb0 1233 struct cache_entry *ce;
5102c617 1234
41284eb0 1235 if (cache_dir_exists(dirname, len))
5102c617
JJ
1236 return index_directory;
1237
41284eb0
DT
1238 ce = cache_file_exists(dirname, len, ignore_case);
1239 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1240 return index_gitdir;
1241
5102c617
JJ
1242 return index_nonexistent;
1243}
1244
09595258
LT
1245/*
1246 * The index sorts alphabetically by entry name, which
1247 * means that a gitlink sorts as '\0' at the end, while
1248 * a directory (which is defined not as an entry, but as
1249 * the files it contains) will sort with the '/' at the
1250 * end.
1251 */
1252static enum exist_status directory_exists_in_index(const char *dirname, int len)
453ec4bd 1253{
5102c617
JJ
1254 int pos;
1255
1256 if (ignore_case)
1257 return directory_exists_in_index_icase(dirname, len);
1258
1259 pos = cache_name_pos(dirname, len);
09595258
LT
1260 if (pos < 0)
1261 pos = -pos-1;
1262 while (pos < active_nr) {
9c5e6c80 1263 const struct cache_entry *ce = active_cache[pos++];
09595258
LT
1264 unsigned char endchar;
1265
1266 if (strncmp(ce->name, dirname, len))
1267 break;
1268 endchar = ce->name[len];
1269 if (endchar > '/')
1270 break;
1271 if (endchar == '/')
1272 return index_directory;
7a51ed66 1273 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1274 return index_gitdir;
1275 }
1276 return index_nonexistent;
1277}
1278
1279/*
1280 * When we find a directory when traversing the filesystem, we
1281 * have three distinct cases:
1282 *
1283 * - ignore it
1284 * - see it as a directory
1285 * - recurse into it
1286 *
1287 * and which one we choose depends on a combination of existing
1288 * git index contents and the flags passed into the directory
1289 * traversal routine.
1290 *
1291 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1292 * directory name, we always recurse into the directory to see
1293 * all the files.
09595258
LT
1294 *
1295 * Case 2: If we *already* have that directory name as a gitlink,
1296 * we always continue to see it as a gitlink, regardless of whether
1297 * there is an actual git directory there or not (it might not
1298 * be checked out as a subproject!)
1299 *
1300 * Case 3: if we didn't have it in the index previously, we
1301 * have a few sub-cases:
1302 *
1303 * (a) if "show_other_directories" is true, we show it as
1304 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1305 * also true, in which case we need to check if it contains any
1306 * untracked and / or ignored files.
09595258 1307 * (b) if it looks like a git directory, and we don't have
302b9282 1308 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1309 * as a directory.
1310 * (c) otherwise, we recurse into it.
1311 */
defd7c7b 1312static enum path_treatment treat_directory(struct dir_struct *dir,
0dcb8d7f 1313 struct untracked_cache_dir *untracked,
2e5910f2 1314 const char *dirname, int len, int baselen, int exclude,
09595258
LT
1315 const struct path_simplify *simplify)
1316{
1317 /* The "len-1" is to strip the final '/' */
1318 switch (directory_exists_in_index(dirname, len-1)) {
1319 case index_directory:
defd7c7b 1320 return path_recurse;
09595258
LT
1321
1322 case index_gitdir:
26c986e1 1323 return path_none;
09595258
LT
1324
1325 case index_nonexistent:
7c4c97c0 1326 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1327 break;
7c4c97c0 1328 if (!(dir->flags & DIR_NO_GITLINKS)) {
09595258
LT
1329 unsigned char sha1[20];
1330 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
defd7c7b 1331 return path_untracked;
09595258 1332 }
defd7c7b 1333 return path_recurse;
09595258
LT
1334 }
1335
1336 /* This is the "show_other_directories" case */
721ac4ed 1337
184d2a8e 1338 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1339 return exclude ? path_excluded : path_untracked;
1340
2e5910f2
DT
1341 untracked = lookup_untracked(dir->untracked, untracked,
1342 dirname + baselen, len - baselen);
0dcb8d7f
NTND
1343 return read_directory_recursive(dir, dirname, len,
1344 untracked, 1, simplify);
453ec4bd
LT
1345}
1346
9fc42d60
LT
1347/*
1348 * This is an inexact early pruning of any recursive directory
1349 * reading - if the path cannot possibly be in the pathspec,
1350 * return true, and we'll skip it early.
1351 */
1352static int simplify_away(const char *path, int pathlen, const struct path_simplify *simplify)
1353{
1354 if (simplify) {
1355 for (;;) {
1356 const char *match = simplify->path;
1357 int len = simplify->len;
1358
1359 if (!match)
1360 break;
1361 if (len > pathlen)
1362 len = pathlen;
1363 if (!memcmp(path, match, len))
1364 return 0;
1365 simplify++;
1366 }
1367 return 1;
1368 }
1369 return 0;
1370}
1371
29209cbe
JK
1372/*
1373 * This function tells us whether an excluded path matches a
1374 * list of "interesting" pathspecs. That is, whether a path matched
1375 * by any of the pathspecs could possibly be ignored by excluding
1376 * the specified path. This can happen if:
1377 *
1378 * 1. the path is mentioned explicitly in the pathspec
1379 *
1380 * 2. the path is a directory prefix of some element in the
1381 * pathspec
1382 */
1383static int exclude_matches_pathspec(const char *path, int len,
1384 const struct path_simplify *simplify)
e96980ef
JK
1385{
1386 if (simplify) {
1387 for (; simplify->path; simplify++) {
1388 if (len == simplify->len
1389 && !memcmp(path, simplify->path, len))
1390 return 1;
29209cbe
JK
1391 if (len < simplify->len
1392 && simplify->path[len] == '/'
1393 && !memcmp(path, simplify->path, len))
1394 return 1;
e96980ef
JK
1395 }
1396 }
1397 return 0;
1398}
1399
443e061a
LT
1400static int get_index_dtype(const char *path, int len)
1401{
1402 int pos;
9c5e6c80 1403 const struct cache_entry *ce;
443e061a 1404
ebbd7439 1405 ce = cache_file_exists(path, len, 0);
443e061a
LT
1406 if (ce) {
1407 if (!ce_uptodate(ce))
1408 return DT_UNKNOWN;
1409 if (S_ISGITLINK(ce->ce_mode))
1410 return DT_DIR;
1411 /*
1412 * Nobody actually cares about the
1413 * difference between DT_LNK and DT_REG
1414 */
1415 return DT_REG;
1416 }
1417
1418 /* Try to look it up as a directory */
1419 pos = cache_name_pos(path, len);
1420 if (pos >= 0)
1421 return DT_UNKNOWN;
1422 pos = -pos-1;
1423 while (pos < active_nr) {
1424 ce = active_cache[pos++];
1425 if (strncmp(ce->name, path, len))
1426 break;
1427 if (ce->name[len] > '/')
1428 break;
1429 if (ce->name[len] < '/')
1430 continue;
1431 if (!ce_uptodate(ce))
1432 break; /* continue? */
1433 return DT_DIR;
1434 }
1435 return DT_UNKNOWN;
1436}
1437
caa6b782 1438static int get_dtype(struct dirent *de, const char *path, int len)
07134421 1439{
6831a88a 1440 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1441 struct stat st;
1442
1443 if (dtype != DT_UNKNOWN)
1444 return dtype;
443e061a
LT
1445 dtype = get_index_dtype(path, len);
1446 if (dtype != DT_UNKNOWN)
1447 return dtype;
1448 if (lstat(path, &st))
07134421
LT
1449 return dtype;
1450 if (S_ISREG(st.st_mode))
1451 return DT_REG;
1452 if (S_ISDIR(st.st_mode))
1453 return DT_DIR;
1454 if (S_ISLNK(st.st_mode))
1455 return DT_LNK;
1456 return dtype;
1457}
1458
16e2cfa9 1459static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1460 struct untracked_cache_dir *untracked,
49dc2cc2 1461 struct strbuf *path,
2e5910f2 1462 int baselen,
16e2cfa9
JH
1463 const struct path_simplify *simplify,
1464 int dtype, struct dirent *de)
53cc5356 1465{
8aaf8d77 1466 int exclude;
ebbd7439 1467 int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);
2eac2a4c 1468
8aaf8d77
KB
1469 if (dtype == DT_UNKNOWN)
1470 dtype = get_dtype(de, path->buf, path->len);
1471
1472 /* Always exclude indexed files */
2eac2a4c 1473 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1474 return path_none;
8aaf8d77 1475
2eac2a4c
JH
1476 /*
1477 * When we are looking at a directory P in the working tree,
1478 * there are three cases:
1479 *
1480 * (1) P exists in the index. Everything inside the directory P in
1481 * the working tree needs to go when P is checked out from the
1482 * index.
1483 *
1484 * (2) P does not exist in the index, but there is P/Q in the index.
1485 * We know P will stay a directory when we check out the contents
1486 * of the index, but we do not know yet if there is a directory
1487 * P/Q in the working tree to be killed, so we need to recurse.
1488 *
1489 * (3) P does not exist in the index, and there is no P/Q in the index
1490 * to require P to be a directory, either. Only in this case, we
1491 * know that everything inside P will not be killed without
1492 * recursing.
1493 */
1494 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1495 (dtype == DT_DIR) &&
de372b1b
ES
1496 !has_path_in_index &&
1497 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))
1498 return path_none;
8aaf8d77
KB
1499
1500 exclude = is_excluded(dir, path->buf, &dtype);
53cc5356
JH
1501
1502 /*
1503 * Excluded? If we don't explicitly want to show
1504 * ignored files, ignore it
1505 */
0aaf62b6 1506 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1507 return path_excluded;
53cc5356 1508
53cc5356
JH
1509 switch (dtype) {
1510 default:
defd7c7b 1511 return path_none;
53cc5356 1512 case DT_DIR:
49dc2cc2 1513 strbuf_addch(path, '/');
2e5910f2
DT
1514 return treat_directory(dir, untracked, path->buf, path->len,
1515 baselen, exclude, simplify);
53cc5356
JH
1516 case DT_REG:
1517 case DT_LNK:
defd7c7b 1518 return exclude ? path_excluded : path_untracked;
53cc5356 1519 }
53cc5356
JH
1520}
1521
91a2288b
NTND
1522static enum path_treatment treat_path_fast(struct dir_struct *dir,
1523 struct untracked_cache_dir *untracked,
1524 struct cached_dir *cdir,
1525 struct strbuf *path,
1526 int baselen,
1527 const struct path_simplify *simplify)
1528{
1529 strbuf_setlen(path, baselen);
1530 if (!cdir->ucd) {
1531 strbuf_addstr(path, cdir->file);
1532 return path_untracked;
1533 }
1534 strbuf_addstr(path, cdir->ucd->name);
1535 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1536 strbuf_complete(path, '/');
91a2288b
NTND
1537 if (cdir->ucd->check_only)
1538 /*
1539 * check_only is set as a result of treat_directory() getting
1540 * to its bottom. Verify again the same set of directories
1541 * with check_only set.
1542 */
1543 return read_directory_recursive(dir, path->buf, path->len,
1544 cdir->ucd, 1, simplify);
1545 /*
1546 * We get path_recurse in the first run when
1547 * directory_exists_in_index() returns index_nonexistent. We
1548 * are sure that new changes in the index does not impact the
1549 * outcome. Return now.
1550 */
1551 return path_recurse;
1552}
1553
16e2cfa9 1554static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1555 struct untracked_cache_dir *untracked,
cf7c6148 1556 struct cached_dir *cdir,
49dc2cc2 1557 struct strbuf *path,
16e2cfa9 1558 int baselen,
49dc2cc2 1559 const struct path_simplify *simplify)
16e2cfa9
JH
1560{
1561 int dtype;
cf7c6148 1562 struct dirent *de = cdir->de;
16e2cfa9 1563
91a2288b
NTND
1564 if (!de)
1565 return treat_path_fast(dir, untracked, cdir, path,
1566 baselen, simplify);
16e2cfa9 1567 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
defd7c7b 1568 return path_none;
49dc2cc2
RS
1569 strbuf_setlen(path, baselen);
1570 strbuf_addstr(path, de->d_name);
1571 if (simplify_away(path->buf, path->len, simplify))
defd7c7b 1572 return path_none;
16e2cfa9
JH
1573
1574 dtype = DTYPE(de);
2e5910f2 1575 return treat_one_path(dir, untracked, path, baselen, simplify, dtype, de);
0dcb8d7f
NTND
1576}
1577
1578static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1579{
1580 if (!dir)
1581 return;
1582 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1583 dir->untracked_alloc);
1584 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1585}
1586
91a2288b
NTND
1587static int valid_cached_dir(struct dir_struct *dir,
1588 struct untracked_cache_dir *untracked,
1589 struct strbuf *path,
1590 int check_only)
1591{
1592 struct stat st;
1593
1594 if (!untracked)
1595 return 0;
1596
1597 if (stat(path->len ? path->buf : ".", &st)) {
1598 invalidate_directory(dir->untracked, untracked);
1599 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1600 return 0;
1601 }
1602 if (!untracked->valid ||
ed4efab1 1603 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {
91a2288b
NTND
1604 if (untracked->valid)
1605 invalidate_directory(dir->untracked, untracked);
1606 fill_stat_data(&untracked->stat_data, &st);
1607 return 0;
1608 }
1609
1610 if (untracked->check_only != !!check_only) {
1611 invalidate_directory(dir->untracked, untracked);
1612 return 0;
1613 }
1614
1615 /*
1616 * prep_exclude will be called eventually on this directory,
1617 * but it's called much later in last_exclude_matching(). We
1618 * need it now to determine the validity of the cache for this
1619 * path. The next calls will be nearly no-op, the way
1620 * prep_exclude() is designed.
1621 */
1622 if (path->len && path->buf[path->len - 1] != '/') {
1623 strbuf_addch(path, '/');
1624 prep_exclude(dir, path->buf, path->len);
1625 strbuf_setlen(path, path->len - 1);
1626 } else
1627 prep_exclude(dir, path->buf, path->len);
1628
1629 /* hopefully prep_exclude() haven't invalidated this entry... */
1630 return untracked->valid;
1631}
1632
cf7c6148
NTND
1633static int open_cached_dir(struct cached_dir *cdir,
1634 struct dir_struct *dir,
1635 struct untracked_cache_dir *untracked,
1636 struct strbuf *path,
1637 int check_only)
1638{
1639 memset(cdir, 0, sizeof(*cdir));
1640 cdir->untracked = untracked;
91a2288b
NTND
1641 if (valid_cached_dir(dir, untracked, path, check_only))
1642 return 0;
cf7c6148 1643 cdir->fdir = opendir(path->len ? path->buf : ".");
91a2288b
NTND
1644 if (dir->untracked)
1645 dir->untracked->dir_opened++;
cf7c6148
NTND
1646 if (!cdir->fdir)
1647 return -1;
1648 return 0;
1649}
1650
1651static int read_cached_dir(struct cached_dir *cdir)
1652{
1653 if (cdir->fdir) {
1654 cdir->de = readdir(cdir->fdir);
1655 if (!cdir->de)
1656 return -1;
1657 return 0;
1658 }
91a2288b
NTND
1659 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1660 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1661 if (!d->recurse) {
1662 cdir->nr_dirs++;
1663 continue;
1664 }
91a2288b
NTND
1665 cdir->ucd = d;
1666 cdir->nr_dirs++;
1667 return 0;
1668 }
1669 cdir->ucd = NULL;
1670 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1671 struct untracked_cache_dir *d = cdir->untracked;
1672 cdir->file = d->untracked[cdir->nr_files++];
1673 return 0;
1674 }
cf7c6148
NTND
1675 return -1;
1676}
1677
1678static void close_cached_dir(struct cached_dir *cdir)
1679{
1680 if (cdir->fdir)
1681 closedir(cdir->fdir);
91a2288b
NTND
1682 /*
1683 * We have gone through this directory and found no untracked
1684 * entries. Mark it valid.
1685 */
26cb0182 1686 if (cdir->untracked) {
91a2288b 1687 cdir->untracked->valid = 1;
26cb0182
NTND
1688 cdir->untracked->recurse = 1;
1689 }
16e2cfa9
JH
1690}
1691
453ec4bd
LT
1692/*
1693 * Read a directory tree. We currently ignore anything but
1694 * directories, regular files and symlinks. That's because git
1695 * doesn't handle them at all yet. Maybe that will change some
1696 * day.
1697 *
1698 * Also, we ignore the name ".git" (even if it is not a directory).
1699 * That likely will not change.
defd7c7b
KB
1700 *
1701 * Returns the most significant path_treatment value encountered in the scan.
453ec4bd 1702 */
defd7c7b 1703static enum path_treatment read_directory_recursive(struct dir_struct *dir,
53cc5356 1704 const char *base, int baselen,
0dcb8d7f 1705 struct untracked_cache_dir *untracked, int check_only,
53cc5356 1706 const struct path_simplify *simplify)
453ec4bd 1707{
cf7c6148 1708 struct cached_dir cdir;
defd7c7b 1709 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1710 struct strbuf path = STRBUF_INIT;
453ec4bd 1711
bef36921 1712 strbuf_add(&path, base, baselen);
02cb6753 1713
cf7c6148 1714 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))
1528d247
RS
1715 goto out;
1716
0dcb8d7f
NTND
1717 if (untracked)
1718 untracked->check_only = !!check_only;
1719
cf7c6148 1720 while (!read_cached_dir(&cdir)) {
defd7c7b 1721 /* check how the file or directory should be treated */
cf7c6148 1722 state = treat_path(dir, untracked, &cdir, &path, baselen, simplify);
0dcb8d7f 1723
defd7c7b
KB
1724 if (state > dir_state)
1725 dir_state = state;
1726
1727 /* recurse into subdir if instructed by treat_path */
1728 if (state == path_recurse) {
0dcb8d7f
NTND
1729 struct untracked_cache_dir *ud;
1730 ud = lookup_untracked(dir->untracked, untracked,
1731 path.buf + baselen,
1732 path.len - baselen);
1733 subdir_state =
1734 read_directory_recursive(dir, path.buf, path.len,
1735 ud, check_only, simplify);
defd7c7b
KB
1736 if (subdir_state > dir_state)
1737 dir_state = subdir_state;
1738 }
1739
1740 if (check_only) {
1741 /* abort early if maximum state has been reached */
0dcb8d7f 1742 if (dir_state == path_untracked) {
91a2288b 1743 if (cdir.fdir)
0dcb8d7f 1744 add_untracked(untracked, path.buf + baselen);
defd7c7b 1745 break;
0dcb8d7f 1746 }
defd7c7b 1747 /* skip the dir_add_* part */
02cb6753 1748 continue;
453ec4bd 1749 }
defd7c7b
KB
1750
1751 /* add the path to the appropriate result list */
1752 switch (state) {
1753 case path_excluded:
1754 if (dir->flags & DIR_SHOW_IGNORED)
1755 dir_add_name(dir, path.buf, path.len);
0aaf62b6
KB
1756 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1757 ((dir->flags & DIR_COLLECT_IGNORED) &&
1758 exclude_matches_pathspec(path.buf, path.len,
1759 simplify)))
1760 dir_add_ignored(dir, path.buf, path.len);
defd7c7b
KB
1761 break;
1762
1763 case path_untracked:
0dcb8d7f
NTND
1764 if (dir->flags & DIR_SHOW_IGNORED)
1765 break;
1766 dir_add_name(dir, path.buf, path.len);
91a2288b 1767 if (cdir.fdir)
0dcb8d7f 1768 add_untracked(untracked, path.buf + baselen);
1528d247 1769 break;
defd7c7b
KB
1770
1771 default:
1772 break;
1773 }
453ec4bd 1774 }
cf7c6148 1775 close_cached_dir(&cdir);
1528d247 1776 out:
bef36921 1777 strbuf_release(&path);
453ec4bd 1778
defd7c7b 1779 return dir_state;
453ec4bd
LT
1780}
1781
1782static int cmp_name(const void *p1, const void *p2)
1783{
1784 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1785 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1786
ccdd4a0f 1787 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
1788}
1789
9fc42d60
LT
1790static struct path_simplify *create_simplify(const char **pathspec)
1791{
1792 int nr, alloc = 0;
1793 struct path_simplify *simplify = NULL;
1794
1795 if (!pathspec)
1796 return NULL;
1797
1798 for (nr = 0 ; ; nr++) {
1799 const char *match;
9af49f82 1800 ALLOC_GROW(simplify, nr + 1, alloc);
9fc42d60
LT
1801 match = *pathspec++;
1802 if (!match)
1803 break;
1804 simplify[nr].path = match;
1805 simplify[nr].len = simple_length(match);
1806 }
1807 simplify[nr].path = NULL;
1808 simplify[nr].len = 0;
1809 return simplify;
1810}
1811
1812static void free_simplify(struct path_simplify *simplify)
1813{
8e0f7003 1814 free(simplify);
9fc42d60
LT
1815}
1816
48ffef96
JH
1817static int treat_leading_path(struct dir_struct *dir,
1818 const char *path, int len,
1819 const struct path_simplify *simplify)
1820{
49dc2cc2
RS
1821 struct strbuf sb = STRBUF_INIT;
1822 int baselen, rc = 0;
48ffef96 1823 const char *cp;
be8a84c5 1824 int old_flags = dir->flags;
48ffef96
JH
1825
1826 while (len && path[len - 1] == '/')
1827 len--;
1828 if (!len)
1829 return 1;
1830 baselen = 0;
be8a84c5 1831 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
1832 while (1) {
1833 cp = path + baselen + !!baselen;
1834 cp = memchr(cp, '/', path + len - cp);
1835 if (!cp)
1836 baselen = len;
1837 else
1838 baselen = cp - path;
49dc2cc2
RS
1839 strbuf_setlen(&sb, 0);
1840 strbuf_add(&sb, path, baselen);
1841 if (!is_directory(sb.buf))
1842 break;
1843 if (simplify_away(sb.buf, sb.len, simplify))
1844 break;
2e5910f2 1845 if (treat_one_path(dir, NULL, &sb, baselen, simplify,
defd7c7b 1846 DT_DIR, NULL) == path_none)
49dc2cc2
RS
1847 break; /* do not recurse into it */
1848 if (len <= baselen) {
1849 rc = 1;
1850 break; /* finished checking */
1851 }
48ffef96 1852 }
49dc2cc2 1853 strbuf_release(&sb);
be8a84c5 1854 dir->flags = old_flags;
49dc2cc2 1855 return rc;
48ffef96
JH
1856}
1857
1e8fef60
NTND
1858static const char *get_ident_string(void)
1859{
1860 static struct strbuf sb = STRBUF_INIT;
1861 struct utsname uts;
1862
1863 if (sb.len)
1864 return sb.buf;
100e4337 1865 if (uname(&uts) < 0)
1e8fef60 1866 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
1867 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
1868 uts.sysname);
1e8fef60
NTND
1869 return sb.buf;
1870}
1871
1872static int ident_in_untracked(const struct untracked_cache *uc)
1873{
0e0f7618
CC
1874 /*
1875 * Previous git versions may have saved many NUL separated
1876 * strings in the "ident" field, but it is insane to manage
1877 * many locations, so just take care of the first one.
1878 */
1e8fef60 1879
0e0f7618 1880 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
1881}
1882
0e0f7618 1883static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 1884{
0e0f7618 1885 strbuf_reset(&uc->ident);
1e8fef60 1886 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
1887
1888 /*
1889 * This strbuf used to contain a list of NUL separated
1890 * strings, so save NUL too for backward compatibility.
1891 */
1e8fef60
NTND
1892 strbuf_addch(&uc->ident, 0);
1893}
1894
4a4ca479
CC
1895static void new_untracked_cache(struct index_state *istate)
1896{
1897 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
1898 strbuf_init(&uc->ident, 100);
1899 uc->exclude_per_dir = ".gitignore";
1900 /* should be the same flags used by git-status */
1901 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 1902 set_untracked_ident(uc);
4a4ca479 1903 istate->untracked = uc;
0e0f7618 1904 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
1905}
1906
1907void add_untracked_cache(struct index_state *istate)
1908{
1909 if (!istate->untracked) {
1910 new_untracked_cache(istate);
0e0f7618
CC
1911 } else {
1912 if (!ident_in_untracked(istate->untracked)) {
1913 free_untracked_cache(istate->untracked);
1914 new_untracked_cache(istate);
1915 }
1916 }
4a4ca479
CC
1917}
1918
07b29bfd
CC
1919void remove_untracked_cache(struct index_state *istate)
1920{
1921 if (istate->untracked) {
1922 free_untracked_cache(istate->untracked);
1923 istate->untracked = NULL;
1924 istate->cache_changed |= UNTRACKED_CHANGED;
1925 }
1926}
1927
ccad261f
NTND
1928static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
1929 int base_len,
1930 const struct pathspec *pathspec)
1931{
1932 struct untracked_cache_dir *root;
1933
76e6b090 1934 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
ccad261f
NTND
1935 return NULL;
1936
1937 /*
1938 * We only support $GIT_DIR/info/exclude and core.excludesfile
1939 * as the global ignore rule files. Any other additions
1940 * (e.g. from command line) invalidate the cache. This
1941 * condition also catches running setup_standard_excludes()
1942 * before setting dir->untracked!
1943 */
1944 if (dir->unmanaged_exclude_files)
1945 return NULL;
1946
1947 /*
1948 * Optimize for the main use case only: whole-tree git
1949 * status. More work involved in treat_leading_path() if we
1950 * use cache on just a subset of the worktree. pathspec
1951 * support could make the matter even worse.
1952 */
1953 if (base_len || (pathspec && pathspec->nr))
1954 return NULL;
1955
1956 /* Different set of flags may produce different results */
1957 if (dir->flags != dir->untracked->dir_flags ||
1958 /*
1959 * See treat_directory(), case index_nonexistent. Without
1960 * this flag, we may need to also cache .git file content
1961 * for the resolve_gitlink_ref() call, which we don't.
1962 */
1963 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
1964 /* We don't support collecting ignore files */
1965 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
1966 DIR_COLLECT_IGNORED)))
1967 return NULL;
1968
1969 /*
1970 * If we use .gitignore in the cache and now you change it to
1971 * .gitexclude, everything will go wrong.
1972 */
1973 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
1974 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
1975 return NULL;
1976
1977 /*
1978 * EXC_CMDL is not considered in the cache. If people set it,
1979 * skip the cache.
1980 */
1981 if (dir->exclude_list_group[EXC_CMDL].nr)
1982 return NULL;
1983
1e8fef60 1984 if (!ident_in_untracked(dir->untracked)) {
0e0f7618 1985 warning(_("Untracked cache is disabled on this system or location."));
1e8fef60
NTND
1986 return NULL;
1987 }
1988
ccad261f
NTND
1989 if (!dir->untracked->root) {
1990 const int len = sizeof(*dir->untracked->root);
1991 dir->untracked->root = xmalloc(len);
1992 memset(dir->untracked->root, 0, len);
1993 }
1994
1995 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
1996 root = dir->untracked->root;
1997 if (hashcmp(dir->ss_info_exclude.sha1,
1998 dir->untracked->ss_info_exclude.sha1)) {
1999 invalidate_gitignore(dir->untracked, root);
2000 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
2001 }
2002 if (hashcmp(dir->ss_excludes_file.sha1,
2003 dir->untracked->ss_excludes_file.sha1)) {
2004 invalidate_gitignore(dir->untracked, root);
2005 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
2006 }
26cb0182
NTND
2007
2008 /* Make sure this directory is not dropped out at saving phase */
2009 root->recurse = 1;
ccad261f
NTND
2010 return root;
2011}
2012
7327d3d1 2013int read_directory(struct dir_struct *dir, const char *path, int len, const struct pathspec *pathspec)
9fc42d60 2014{
725b0605 2015 struct path_simplify *simplify;
ccad261f 2016 struct untracked_cache_dir *untracked;
b4189aa8 2017
7327d3d1
NTND
2018 /*
2019 * Check out create_simplify()
2020 */
2021 if (pathspec)
5c6933d2
NTND
2022 GUARD_PATHSPEC(pathspec,
2023 PATHSPEC_FROMTOP |
2024 PATHSPEC_MAXDEPTH |
bd30c2e4 2025 PATHSPEC_LITERAL |
93d93537 2026 PATHSPEC_GLOB |
ef79b1f8
NTND
2027 PATHSPEC_ICASE |
2028 PATHSPEC_EXCLUDE);
7327d3d1 2029
dba2e203 2030 if (has_symlink_leading_path(path, len))
725b0605
JH
2031 return dir->nr;
2032
ef79b1f8
NTND
2033 /*
2034 * exclude patterns are treated like positive ones in
2035 * create_simplify. Usually exclude patterns should be a
2036 * subset of positive ones, which has no impacts on
2037 * create_simplify().
2038 */
b3920bbd 2039 simplify = create_simplify(pathspec ? pathspec->_raw : NULL);
ccad261f
NTND
2040 untracked = validate_untracked_cache(dir, len, pathspec);
2041 if (!untracked)
2042 /*
2043 * make sure untracked cache code path is disabled,
2044 * e.g. prep_exclude()
2045 */
2046 dir->untracked = NULL;
48ffef96 2047 if (!len || treat_leading_path(dir, path, len, simplify))
ccad261f 2048 read_directory_recursive(dir, path, len, untracked, 0, simplify);
9fc42d60 2049 free_simplify(simplify);
9ed0d8d6
RS
2050 QSORT(dir->entries, dir->nr, cmp_name);
2051 QSORT(dir->ignored, dir->ignored_nr, cmp_name);
c9ccb5d3
NTND
2052 if (dir->untracked) {
2053 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2054 trace_printf_key(&trace_untracked_stats,
2055 "node creation: %u\n"
2056 "gitignore invalidation: %u\n"
2057 "directory invalidation: %u\n"
2058 "opendir: %u\n",
2059 dir->untracked->dir_created,
2060 dir->untracked->gitignore_invalidated,
2061 dir->untracked->dir_invalidated,
2062 dir->untracked->dir_opened);
1bbb3dba
NTND
2063 if (dir->untracked == the_index.untracked &&
2064 (dir->untracked->dir_opened ||
2065 dir->untracked->gitignore_invalidated ||
2066 dir->untracked->dir_invalidated))
2067 the_index.cache_changed |= UNTRACKED_CHANGED;
2068 if (dir->untracked != the_index.untracked) {
2069 free(dir->untracked);
2070 dir->untracked = NULL;
2071 }
c9ccb5d3 2072 }
453ec4bd
LT
2073 return dir->nr;
2074}
c91f0d92 2075
686a4a06 2076int file_exists(const char *f)
c91f0d92 2077{
686a4a06 2078 struct stat sb;
a50f9fc5 2079 return lstat(f, &sb) == 0;
c91f0d92 2080}
e6636747 2081
63ec5e1f
JS
2082static int cmp_icase(char a, char b)
2083{
2084 if (a == b)
2085 return 0;
2086 if (ignore_case)
2087 return toupper(a) - toupper(b);
2088 return a - b;
2089}
2090
e6636747 2091/*
9b125da4
NTND
2092 * Given two normalized paths (a trailing slash is ok), if subdir is
2093 * outside dir, return -1. Otherwise return the offset in subdir that
2094 * can be used as relative path to dir.
e6636747 2095 */
9b125da4 2096int dir_inside_of(const char *subdir, const char *dir)
e6636747 2097{
9b125da4 2098 int offset = 0;
e6636747 2099
9b125da4 2100 assert(dir && subdir && *dir && *subdir);
e6636747 2101
63ec5e1f 2102 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2103 dir++;
9b125da4
NTND
2104 subdir++;
2105 offset++;
490544b1 2106 }
9b125da4
NTND
2107
2108 /* hel[p]/me vs hel[l]/yeah */
2109 if (*dir && *subdir)
2110 return -1;
2111
2112 if (!*subdir)
2113 return !*dir ? offset : -1; /* same dir */
2114
2115 /* foo/[b]ar vs foo/[] */
2116 if (is_dir_sep(dir[-1]))
2117 return is_dir_sep(subdir[-1]) ? offset : -1;
2118
2119 /* foo[/]bar vs foo[] */
2120 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2121}
2122
2123int is_inside_dir(const char *dir)
2124{
56b9f6e7
RS
2125 char *cwd;
2126 int rc;
2127
b892913d
NTND
2128 if (!dir)
2129 return 0;
56b9f6e7
RS
2130
2131 cwd = xgetcwd();
2132 rc = (dir_inside_of(cwd, dir) >= 0);
2133 free(cwd);
2134 return rc;
e6636747 2135}
7155b727 2136
55892d23
AP
2137int is_empty_dir(const char *path)
2138{
2139 DIR *dir = opendir(path);
2140 struct dirent *e;
2141 int ret = 1;
2142
2143 if (!dir)
2144 return 0;
2145
2146 while ((e = readdir(dir)) != NULL)
2147 if (!is_dot_or_dotdot(e->d_name)) {
2148 ret = 0;
2149 break;
2150 }
2151
2152 closedir(dir);
2153 return ret;
2154}
2155
ae2f203e 2156static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2157{
a0f4afbe 2158 DIR *dir;
7155b727 2159 struct dirent *e;
ae2f203e 2160 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2161 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2162 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
a0f4afbe 2163 unsigned char submodule_head[20];
7155b727 2164
a0f4afbe 2165 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
ae2f203e 2166 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
a0f4afbe 2167 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2168 if (kept_up)
2169 *kept_up = 1;
a0f4afbe 2170 return 0;
ae2f203e 2171 }
a0f4afbe 2172
ae2f203e 2173 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2174 dir = opendir(path->buf);
c844a803 2175 if (!dir) {
863808cd
MH
2176 if (errno == ENOENT)
2177 return keep_toplevel ? -1 : 0;
2178 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2179 /*
2180 * An empty dir could be removable even if it
2181 * is unreadable:
2182 */
c844a803
JH
2183 return rmdir(path->buf);
2184 else
2185 return -1;
2186 }
00b6c178 2187 strbuf_complete(path, '/');
7155b727
JS
2188
2189 len = path->len;
2190 while ((e = readdir(dir)) != NULL) {
2191 struct stat st;
8ca12c0d
AP
2192 if (is_dot_or_dotdot(e->d_name))
2193 continue;
7155b727
JS
2194
2195 strbuf_setlen(path, len);
2196 strbuf_addstr(path, e->d_name);
863808cd
MH
2197 if (lstat(path->buf, &st)) {
2198 if (errno == ENOENT)
2199 /*
2200 * file disappeared, which is what we
2201 * wanted anyway
2202 */
2203 continue;
2204 /* fall thru */
2205 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2206 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2207 continue; /* happy */
863808cd
MH
2208 } else if (!only_empty &&
2209 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2210 continue; /* happy, too */
863808cd 2211 }
7155b727
JS
2212
2213 /* path too long, stat fails, or non-directory still exists */
2214 ret = -1;
2215 break;
2216 }
2217 closedir(dir);
2218
2219 strbuf_setlen(path, original_len);
ae2f203e 2220 if (!ret && !keep_toplevel && !kept_down)
863808cd 2221 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2222 else if (kept_up)
2223 /*
2224 * report the uplevel that it is not an error that we
2225 * did not rmdir() our directory.
2226 */
2227 *kept_up = !ret;
7155b727
JS
2228 return ret;
2229}
039bc64e 2230
ae2f203e
JH
2231int remove_dir_recursively(struct strbuf *path, int flag)
2232{
2233 return remove_dir_recurse(path, flag, NULL);
2234}
2235
f932729c
JK
2236static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2237
039bc64e
JH
2238void setup_standard_excludes(struct dir_struct *dir)
2239{
039bc64e 2240 dir->exclude_per_dir = ".gitignore";
099d2d86
JH
2241
2242 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2845ce7f
PT
2243 if (!excludes_file)
2244 excludes_file = xdg_config_home("ignore");
4698c8fe 2245 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2246 add_excludes_from_file_1(dir, excludes_file,
2247 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2248
2249 /* per repository user preference */
f0056f64
JK
2250 if (startup_info->have_repository) {
2251 const char *path = git_path_info_exclude();
2252 if (!access_or_warn(path, R_OK, 0))
2253 add_excludes_from_file_1(dir, path,
2254 dir->untracked ? &dir->ss_info_exclude : NULL);
2255 }
039bc64e 2256}
4a92d1bf
AR
2257
2258int remove_path(const char *name)
2259{
2260 char *slash;
2261
9a6728d4 2262 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)
4a92d1bf
AR
2263 return -1;
2264
2265 slash = strrchr(name, '/');
2266 if (slash) {
2267 char *dirs = xstrdup(name);
2268 slash = dirs + (slash - name);
2269 do {
2270 *slash = '\0';
3fc0d131 2271 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2272 free(dirs);
2273 }
2274 return 0;
2275}
2276
270be816
AS
2277/*
2278 * Frees memory within dir which was allocated for exclude lists and
2279 * the exclude_stack. Does not free dir itself.
2280 */
2281void clear_directory(struct dir_struct *dir)
2282{
2283 int i, j;
2284 struct exclude_list_group *group;
2285 struct exclude_list *el;
2286 struct exclude_stack *stk;
2287
2288 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2289 group = &dir->exclude_list_group[i];
2290 for (j = 0; j < group->nr; j++) {
2291 el = &group->el[j];
2292 if (i == EXC_DIRS)
2293 free((char *)el->src);
2294 clear_exclude_list(el);
2295 }
2296 free(group->el);
2297 }
2298
2299 stk = dir->exclude_stack;
2300 while (stk) {
2301 struct exclude_stack *prev = stk->prev;
2302 free(stk);
2303 stk = prev;
2304 }
aceb9429 2305 strbuf_release(&dir->basebuf);
270be816 2306}
83c094ad
NTND
2307
2308struct ondisk_untracked_cache {
2309 struct stat_data info_exclude_stat;
2310 struct stat_data excludes_file_stat;
2311 uint32_t dir_flags;
2312 unsigned char info_exclude_sha1[20];
2313 unsigned char excludes_file_sha1[20];
2314 char exclude_per_dir[FLEX_ARRAY];
2315};
2316
2317#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)
2318
2319struct write_data {
2320 int index; /* number of written untracked_cache_dir */
2321 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2322 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2323 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2324 struct strbuf out;
2325 struct strbuf sb_stat;
2326 struct strbuf sb_sha1;
2327};
2328
2329static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2330{
2331 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2332 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2333 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2334 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2335 to->sd_dev = htonl(from->sd_dev);
2336 to->sd_ino = htonl(from->sd_ino);
2337 to->sd_uid = htonl(from->sd_uid);
2338 to->sd_gid = htonl(from->sd_gid);
2339 to->sd_size = htonl(from->sd_size);
2340}
2341
2342static void write_one_dir(struct untracked_cache_dir *untracked,
2343 struct write_data *wd)
2344{
2345 struct stat_data stat_data;
2346 struct strbuf *out = &wd->out;
2347 unsigned char intbuf[16];
2348 unsigned int intlen, value;
2349 int i = wd->index++;
2350
2351 /*
2352 * untracked_nr should be reset whenever valid is clear, but
2353 * for safety..
2354 */
2355 if (!untracked->valid) {
2356 untracked->untracked_nr = 0;
2357 untracked->check_only = 0;
2358 }
2359
2360 if (untracked->check_only)
2361 ewah_set(wd->check_only, i);
2362 if (untracked->valid) {
2363 ewah_set(wd->valid, i);
2364 stat_data_to_disk(&stat_data, &untracked->stat_data);
2365 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2366 }
2367 if (!is_null_sha1(untracked->exclude_sha1)) {
2368 ewah_set(wd->sha1_valid, i);
2369 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2370 }
2371
2372 intlen = encode_varint(untracked->untracked_nr, intbuf);
2373 strbuf_add(out, intbuf, intlen);
2374
2375 /* skip non-recurse directories */
2376 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2377 if (untracked->dirs[i]->recurse)
2378 value++;
2379 intlen = encode_varint(value, intbuf);
2380 strbuf_add(out, intbuf, intlen);
2381
2382 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2383
2384 for (i = 0; i < untracked->untracked_nr; i++)
2385 strbuf_add(out, untracked->untracked[i],
2386 strlen(untracked->untracked[i]) + 1);
2387
2388 for (i = 0; i < untracked->dirs_nr; i++)
2389 if (untracked->dirs[i]->recurse)
2390 write_one_dir(untracked->dirs[i], wd);
2391}
2392
2393void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2394{
2395 struct ondisk_untracked_cache *ouc;
2396 struct write_data wd;
2397 unsigned char varbuf[16];
e0b83735
JK
2398 int varint_len;
2399 size_t len = strlen(untracked->exclude_per_dir);
2400
2401 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
83c094ad
NTND
2402 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2403 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2404 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2405 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2406 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2407
2408 varint_len = encode_varint(untracked->ident.len, varbuf);
2409 strbuf_add(out, varbuf, varint_len);
8109984d 2410 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2411
83c094ad
NTND
2412 strbuf_add(out, ouc, ouc_size(len));
2413 free(ouc);
2414 ouc = NULL;
2415
2416 if (!untracked->root) {
2417 varint_len = encode_varint(0, varbuf);
2418 strbuf_add(out, varbuf, varint_len);
2419 return;
2420 }
2421
2422 wd.index = 0;
2423 wd.check_only = ewah_new();
2424 wd.valid = ewah_new();
2425 wd.sha1_valid = ewah_new();
2426 strbuf_init(&wd.out, 1024);
2427 strbuf_init(&wd.sb_stat, 1024);
2428 strbuf_init(&wd.sb_sha1, 1024);
2429 write_one_dir(untracked->root, &wd);
2430
2431 varint_len = encode_varint(wd.index, varbuf);
2432 strbuf_add(out, varbuf, varint_len);
2433 strbuf_addbuf(out, &wd.out);
2434 ewah_serialize_strbuf(wd.valid, out);
2435 ewah_serialize_strbuf(wd.check_only, out);
2436 ewah_serialize_strbuf(wd.sha1_valid, out);
2437 strbuf_addbuf(out, &wd.sb_stat);
2438 strbuf_addbuf(out, &wd.sb_sha1);
2439 strbuf_addch(out, '\0'); /* safe guard for string lists */
2440
2441 ewah_free(wd.valid);
2442 ewah_free(wd.check_only);
2443 ewah_free(wd.sha1_valid);
2444 strbuf_release(&wd.out);
2445 strbuf_release(&wd.sb_stat);
2446 strbuf_release(&wd.sb_sha1);
2447}
f9e6c649
NTND
2448
2449static void free_untracked(struct untracked_cache_dir *ucd)
2450{
2451 int i;
2452 if (!ucd)
2453 return;
2454 for (i = 0; i < ucd->dirs_nr; i++)
2455 free_untracked(ucd->dirs[i]);
2456 for (i = 0; i < ucd->untracked_nr; i++)
2457 free(ucd->untracked[i]);
2458 free(ucd->untracked);
2459 free(ucd->dirs);
2460 free(ucd);
2461}
2462
2463void free_untracked_cache(struct untracked_cache *uc)
2464{
2465 if (uc)
2466 free_untracked(uc->root);
2467 free(uc);
2468}
2469
2470struct read_data {
2471 int index;
2472 struct untracked_cache_dir **ucd;
2473 struct ewah_bitmap *check_only;
2474 struct ewah_bitmap *valid;
2475 struct ewah_bitmap *sha1_valid;
2476 const unsigned char *data;
2477 const unsigned char *end;
2478};
2479
2480static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
2481{
2482 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
2483 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
2484 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
2485 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
2486 to->sd_dev = get_be32(&from->sd_dev);
2487 to->sd_ino = get_be32(&from->sd_ino);
2488 to->sd_uid = get_be32(&from->sd_uid);
2489 to->sd_gid = get_be32(&from->sd_gid);
2490 to->sd_size = get_be32(&from->sd_size);
2491}
2492
2493static int read_one_dir(struct untracked_cache_dir **untracked_,
2494 struct read_data *rd)
2495{
2496 struct untracked_cache_dir ud, *untracked;
2497 const unsigned char *next, *data = rd->data, *end = rd->end;
2498 unsigned int value;
2499 int i, len;
2500
2501 memset(&ud, 0, sizeof(ud));
2502
2503 next = data;
2504 value = decode_varint(&next);
2505 if (next > end)
2506 return -1;
2507 ud.recurse = 1;
2508 ud.untracked_alloc = value;
2509 ud.untracked_nr = value;
2510 if (ud.untracked_nr)
b32fa95f 2511 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649
NTND
2512 data = next;
2513
2514 next = data;
2515 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2516 if (next > end)
2517 return -1;
b32fa95f 2518 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649
NTND
2519 data = next;
2520
2521 len = strlen((const char *)data);
2522 next = data + len + 1;
2523 if (next > rd->end)
2524 return -1;
50a6c8ef 2525 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));
f9e6c649
NTND
2526 memcpy(untracked, &ud, sizeof(ud));
2527 memcpy(untracked->name, data, len + 1);
2528 data = next;
2529
2530 for (i = 0; i < untracked->untracked_nr; i++) {
2531 len = strlen((const char *)data);
2532 next = data + len + 1;
2533 if (next > rd->end)
2534 return -1;
2535 untracked->untracked[i] = xstrdup((const char*)data);
2536 data = next;
2537 }
2538
2539 rd->ucd[rd->index++] = untracked;
2540 rd->data = data;
2541
2542 for (i = 0; i < untracked->dirs_nr; i++) {
2543 len = read_one_dir(untracked->dirs + i, rd);
2544 if (len < 0)
2545 return -1;
2546 }
2547 return 0;
2548}
2549
2550static void set_check_only(size_t pos, void *cb)
2551{
2552 struct read_data *rd = cb;
2553 struct untracked_cache_dir *ud = rd->ucd[pos];
2554 ud->check_only = 1;
2555}
2556
2557static void read_stat(size_t pos, void *cb)
2558{
2559 struct read_data *rd = cb;
2560 struct untracked_cache_dir *ud = rd->ucd[pos];
2561 if (rd->data + sizeof(struct stat_data) > rd->end) {
2562 rd->data = rd->end + 1;
2563 return;
2564 }
2565 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
2566 rd->data += sizeof(struct stat_data);
2567 ud->valid = 1;
2568}
2569
2570static void read_sha1(size_t pos, void *cb)
2571{
2572 struct read_data *rd = cb;
2573 struct untracked_cache_dir *ud = rd->ucd[pos];
2574 if (rd->data + 20 > rd->end) {
2575 rd->data = rd->end + 1;
2576 return;
2577 }
2578 hashcpy(ud->exclude_sha1, rd->data);
2579 rd->data += 20;
2580}
2581
2582static void load_sha1_stat(struct sha1_stat *sha1_stat,
2583 const struct stat_data *stat,
2584 const unsigned char *sha1)
2585{
2586 stat_data_from_disk(&sha1_stat->stat, stat);
2587 hashcpy(sha1_stat->sha1, sha1);
2588 sha1_stat->valid = 1;
2589}
2590
2591struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2592{
2593 const struct ondisk_untracked_cache *ouc;
2594 struct untracked_cache *uc;
2595 struct read_data rd;
2596 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60
NTND
2597 const char *ident;
2598 int ident_len, len;
f9e6c649
NTND
2599
2600 if (sz <= 1 || end[-1] != '\0')
2601 return NULL;
2602 end--;
2603
1e8fef60
NTND
2604 ident_len = decode_varint(&next);
2605 if (next + ident_len > end)
2606 return NULL;
2607 ident = (const char *)next;
2608 next += ident_len;
2609
f9e6c649
NTND
2610 ouc = (const struct ondisk_untracked_cache *)next;
2611 if (next + ouc_size(0) > end)
2612 return NULL;
2613
2614 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2615 strbuf_init(&uc->ident, ident_len);
2616 strbuf_add(&uc->ident, ident, ident_len);
f9e6c649
NTND
2617 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
2618 ouc->info_exclude_sha1);
2619 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
2620 ouc->excludes_file_sha1);
2621 uc->dir_flags = get_be32(&ouc->dir_flags);
2622 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
2623 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
2624 next += ouc_size(strlen(ouc->exclude_per_dir));
2625 if (next >= end)
2626 goto done2;
2627
2628 len = decode_varint(&next);
2629 if (next > end || len == 0)
2630 goto done2;
2631
2632 rd.valid = ewah_new();
2633 rd.check_only = ewah_new();
2634 rd.sha1_valid = ewah_new();
2635 rd.data = next;
2636 rd.end = end;
2637 rd.index = 0;
b32fa95f 2638 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2639
2640 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2641 goto done;
2642
2643 next = rd.data;
2644 len = ewah_read_mmap(rd.valid, next, end - next);
2645 if (len < 0)
2646 goto done;
2647
2648 next += len;
2649 len = ewah_read_mmap(rd.check_only, next, end - next);
2650 if (len < 0)
2651 goto done;
2652
2653 next += len;
2654 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2655 if (len < 0)
2656 goto done;
2657
2658 ewah_each_bit(rd.check_only, set_check_only, &rd);
2659 rd.data = next + len;
2660 ewah_each_bit(rd.valid, read_stat, &rd);
2661 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2662 next = rd.data;
2663
2664done:
2665 free(rd.ucd);
2666 ewah_free(rd.valid);
2667 ewah_free(rd.check_only);
2668 ewah_free(rd.sha1_valid);
2669done2:
2670 if (next != end) {
2671 free_untracked_cache(uc);
2672 uc = NULL;
2673 }
2674 return uc;
2675}
e931371a 2676
73f9145f
NTND
2677static void invalidate_one_directory(struct untracked_cache *uc,
2678 struct untracked_cache_dir *ucd)
2679{
2680 uc->dir_invalidated++;
2681 ucd->valid = 0;
2682 ucd->untracked_nr = 0;
2683}
2684
2685/*
2686 * Normally when an entry is added or removed from a directory,
2687 * invalidating that directory is enough. No need to touch its
2688 * ancestors. When a directory is shown as "foo/bar/" in git-status
2689 * however, deleting or adding an entry may have cascading effect.
2690 *
2691 * Say the "foo/bar/file" has become untracked, we need to tell the
2692 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2693 * directory any more (because "bar" is managed by foo as an untracked
2694 * "file").
2695 *
2696 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2697 * was the last untracked entry in the entire "foo", we should show
2698 * "foo/" instead. Which means we have to invalidate past "bar" up to
2699 * "foo".
2700 *
2701 * This function traverses all directories from root to leaf. If there
2702 * is a chance of one of the above cases happening, we invalidate back
2703 * to root. Otherwise we just invalidate the leaf. There may be a more
2704 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2705 * detect these cases and avoid unnecessary invalidation, for example,
2706 * checking for the untracked entry named "bar/" in "foo", but for now
2707 * stick to something safe and simple.
2708 */
2709static int invalidate_one_component(struct untracked_cache *uc,
2710 struct untracked_cache_dir *dir,
2711 const char *path, int len)
2712{
2713 const char *rest = strchr(path, '/');
2714
2715 if (rest) {
2716 int component_len = rest - path;
2717 struct untracked_cache_dir *d =
2718 lookup_untracked(uc, dir, path, component_len);
2719 int ret =
2720 invalidate_one_component(uc, d, rest + 1,
2721 len - (component_len + 1));
2722 if (ret)
2723 invalidate_one_directory(uc, dir);
2724 return ret;
2725 }
2726
2727 invalidate_one_directory(uc, dir);
2728 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2729}
2730
e931371a
NTND
2731void untracked_cache_invalidate_path(struct index_state *istate,
2732 const char *path)
2733{
e931371a
NTND
2734 if (!istate->untracked || !istate->untracked->root)
2735 return;
73f9145f
NTND
2736 invalidate_one_component(istate->untracked, istate->untracked->root,
2737 path, strlen(path));
e931371a
NTND
2738}
2739
2740void untracked_cache_remove_from_index(struct index_state *istate,
2741 const char *path)
2742{
2743 untracked_cache_invalidate_path(istate, path);
2744}
2745
2746void untracked_cache_add_to_index(struct index_state *istate,
2747 const char *path)
2748{
2749 untracked_cache_invalidate_path(istate, path);
2750}