RelNotes: further fixes for 2.14.2 from the master front
[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 */
12cd0bf9 10#define NO_THE_INDEX_COMPATIBILITY_MACROS
453ec4bd 11#include "cache.h"
b2141fc1 12#include "config.h"
453ec4bd 13#include "dir.h"
b0db7046 14#include "attr.h"
09595258 15#include "refs.h"
237ec6e4 16#include "wildmatch.h"
64acde94 17#include "pathspec.h"
dde843e7 18#include "utf8.h"
83c094ad
NTND
19#include "varint.h"
20#include "ewah/ewok.h"
453ec4bd 21
defd7c7b
KB
22/*
23 * Tells read_directory_recursive how a file or directory should be treated.
24 * Values are ordered by significance, e.g. if a directory contains both
25 * excluded and untracked files, it is listed as untracked because
26 * path_untracked > path_excluded.
27 */
28enum path_treatment {
29 path_none = 0,
30 path_recurse,
31 path_excluded,
32 path_untracked
33};
34
cf7c6148
NTND
35/*
36 * Support data structure for our opendir/readdir/closedir wrappers
37 */
38struct cached_dir {
39 DIR *fdir;
40 struct untracked_cache_dir *untracked;
91a2288b
NTND
41 int nr_files;
42 int nr_dirs;
43
cf7c6148 44 struct dirent *de;
91a2288b
NTND
45 const char *file;
46 struct untracked_cache_dir *ucd;
cf7c6148
NTND
47};
48
defd7c7b 49static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0ef8e169
BW
50 struct index_state *istate, const char *path, int len,
51 struct untracked_cache_dir *untracked,
e1b8c7bd 52 int check_only, const struct pathspec *pathspec);
98f2a687
BW
53static int get_dtype(struct dirent *de, struct index_state *istate,
54 const char *path, int len);
09595258 55
e0556a92
PC
56int count_slashes(const char *s)
57{
58 int cnt = 0;
59 while (*s)
60 if (*s++ == '/')
61 cnt++;
62 return cnt;
63}
64
ba0897e6 65int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
66{
67 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
68}
69
ba0897e6 70int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
71{
72 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
73}
74
1f26ce61
CB
75int git_fnmatch(const struct pathspec_item *item,
76 const char *pattern, const char *string,
77 int prefix)
5d74762d 78{
5d74762d 79 if (prefix > 0) {
93d93537 80 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 81 return WM_NOMATCH;
5d74762d
NTND
82 pattern += prefix;
83 string += prefix;
84 }
bd30c2e4 85 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
86 int pattern_len = strlen(++pattern);
87 int string_len = strlen(string);
88 return string_len < pattern_len ||
93d93537
NTND
89 ps_strcmp(item, pattern,
90 string + string_len - pattern_len);
8c6abbcd 91 }
bd30c2e4 92 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
93 return wildmatch(pattern, string,
94 WM_PATHNAME |
55d34269 95 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0));
bd30c2e4
NTND
96 else
97 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f 98 return wildmatch(pattern, string,
55d34269 99 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0);
5d74762d
NTND
100}
101
0b6e56df
JH
102static int fnmatch_icase_mem(const char *pattern, int patternlen,
103 const char *string, int stringlen,
104 int flags)
105{
106 int match_status;
107 struct strbuf pat_buf = STRBUF_INIT;
108 struct strbuf str_buf = STRBUF_INIT;
109 const char *use_pat = pattern;
110 const char *use_str = string;
111
112 if (pattern[patternlen]) {
113 strbuf_add(&pat_buf, pattern, patternlen);
114 use_pat = pat_buf.buf;
115 }
116 if (string[stringlen]) {
117 strbuf_add(&str_buf, string, stringlen);
118 use_str = str_buf.buf;
119 }
120
f30366b2
JH
121 if (ignore_case)
122 flags |= WM_CASEFOLD;
55d34269 123 match_status = wildmatch(use_pat, use_str, flags);
0b6e56df
JH
124
125 strbuf_release(&pat_buf);
126 strbuf_release(&str_buf);
127
128 return match_status;
129}
130
827f4d6c 131static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 132{
827f4d6c 133 int n;
4a085b16 134 size_t max = 0;
3c6a370b 135
93d93537
NTND
136 /*
137 * ":(icase)path" is treated as a pathspec full of
138 * wildcard. In other words, only prefix is considered common
139 * prefix. If the pathspec is abc/foo abc/bar, running in
140 * subdir xyz, the common prefix is still xyz, not xuz/abc as
141 * in non-:(icase).
142 */
5c6933d2
NTND
143 GUARD_PATHSPEC(pathspec,
144 PATHSPEC_FROMTOP |
145 PATHSPEC_MAXDEPTH |
bd30c2e4 146 PATHSPEC_LITERAL |
93d93537 147 PATHSPEC_GLOB |
ef79b1f8 148 PATHSPEC_ICASE |
b0db7046
BW
149 PATHSPEC_EXCLUDE |
150 PATHSPEC_ATTR);
4a085b16 151
827f4d6c 152 for (n = 0; n < pathspec->nr; n++) {
93d93537 153 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
154 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
155 continue;
93d93537
NTND
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)) {
827f4d6c
NTND
161 char c = pathspec->items[n].match[i];
162 if (c != pathspec->items[0].match[i])
4a085b16
JH
163 break;
164 if (c == '/')
165 len = i + 1;
827f4d6c 166 i++;
4a085b16 167 }
827f4d6c 168 if (n == 0 || len < max) {
4a085b16
JH
169 max = len;
170 if (!max)
171 break;
172 }
3c6a370b 173 }
4a085b16 174 return max;
3c6a370b
LT
175}
176
f950eb95
CB
177/*
178 * Returns a copy of the longest leading path common among all
179 * pathspecs.
180 */
827f4d6c 181char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
182{
183 unsigned long len = common_prefix_len(pathspec);
184
827f4d6c 185 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
186}
187
0d32c183
BW
188int fill_directory(struct dir_struct *dir,
189 struct index_state *istate,
190 const struct pathspec *pathspec)
1d8842d9 191{
bec5ab89 192 const char *prefix;
966de302 193 size_t prefix_len;
1d8842d9
LT
194
195 /*
196 * Calculate common prefix for the pathspec, and
197 * use that to optimize the directory walk
198 */
bec5ab89
RS
199 prefix_len = common_prefix_len(pathspec);
200 prefix = prefix_len ? pathspec->items[0].match : "";
1d8842d9
LT
201
202 /* Read the directory and prune it */
0d32c183 203 read_directory(dir, istate, prefix, prefix_len, pathspec);
966de302 204
966de302 205 return prefix_len;
1d8842d9
LT
206}
207
bc96cc87
NTND
208int within_depth(const char *name, int namelen,
209 int depth, int max_depth)
210{
211 const char *cp = name, *cpe = name + namelen;
212
213 while (cp < cpe) {
214 if (*cp++ != '/')
215 continue;
216 depth++;
217 if (depth > max_depth)
218 return 0;
219 }
220 return 1;
221}
222
75a6315f
BW
223#define DO_MATCH_EXCLUDE (1<<0)
224#define DO_MATCH_DIRECTORY (1<<1)
225#define DO_MATCH_SUBMODULE (1<<2)
42b0874a 226
b0db7046
BW
227static int match_attrs(const char *name, int namelen,
228 const struct pathspec_item *item)
229{
230 int i;
231
232 git_check_attr(name, item->attr_check);
233 for (i = 0; i < item->attr_match_nr; i++) {
234 const char *value;
235 int matched;
236 enum attr_match_mode match_mode;
237
238 value = item->attr_check->items[i].value;
239 match_mode = item->attr_match[i].match_mode;
240
241 if (ATTR_TRUE(value))
242 matched = (match_mode == MATCH_SET);
243 else if (ATTR_FALSE(value))
244 matched = (match_mode == MATCH_UNSET);
245 else if (ATTR_UNSET(value))
246 matched = (match_mode == MATCH_UNSPECIFIED);
247 else
248 matched = (match_mode == MATCH_VALUE &&
249 !strcmp(item->attr_match[i].value, value));
250 if (!matched)
251 return 0;
252 }
253
254 return 1;
255}
256
61cf2820
NTND
257/*
258 * Does 'match' match the given name?
259 * A match is found if
260 *
261 * (1) the 'match' string is leading directory of 'name', or
262 * (2) the 'match' string is a wildcard and matches 'name', or
263 * (3) the 'match' string is exactly the same as 'name'.
264 *
265 * and the return value tells which case it was.
266 *
267 * It returns 0 when there is no match.
268 */
269static int match_pathspec_item(const struct pathspec_item *item, int prefix,
42b0874a 270 const char *name, int namelen, unsigned flags)
61cf2820
NTND
271{
272 /* name/namelen has prefix cut off by caller */
273 const char *match = item->match + prefix;
274 int matchlen = item->len - prefix;
275
93d93537
NTND
276 /*
277 * The normal call pattern is:
278 * 1. prefix = common_prefix_len(ps);
279 * 2. prune something, or fill_directory
854b0959 280 * 3. match_pathspec()
93d93537
NTND
281 *
282 * 'prefix' at #1 may be shorter than the command's prefix and
283 * it's ok for #2 to match extra files. Those extras will be
284 * trimmed at #3.
285 *
286 * Suppose the pathspec is 'foo' and '../bar' running from
287 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
288 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
289 * user does not want XYZ/foo, only the "foo" part should be
290 * case-insensitive. We need to filter out XYZ/foo here. In
291 * other words, we do not trust the caller on comparing the
292 * prefix part when :(icase) is involved. We do exact
293 * comparison ourselves.
294 *
295 * Normally the caller (common_prefix_len() in fact) does
296 * _exact_ matching on name[-prefix+1..-1] and we do not need
297 * to check that part. Be defensive and check it anyway, in
298 * case common_prefix_len is changed, or a new caller is
299 * introduced that does not use common_prefix_len.
300 *
301 * If the penalty turns out too high when prefix is really
302 * long, maybe change it to
303 * strncmp(match, name, item->prefix - prefix)
304 */
305 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
306 strncmp(item->match, name - prefix, item->prefix))
307 return 0;
308
b0db7046
BW
309 if (item->attr_match_nr && !match_attrs(name, namelen, item))
310 return 0;
311
61cf2820
NTND
312 /* If the match was just the prefix, we matched */
313 if (!*match)
314 return MATCHED_RECURSIVELY;
315
93d93537 316 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
317 if (matchlen == namelen)
318 return MATCHED_EXACTLY;
319
320 if (match[matchlen-1] == '/' || name[matchlen] == '/')
321 return MATCHED_RECURSIVELY;
68690fdd
NTND
322 } else if ((flags & DO_MATCH_DIRECTORY) &&
323 match[matchlen - 1] == '/' &&
324 namelen == matchlen - 1 &&
325 !ps_strncmp(item, match, name, namelen))
326 return MATCHED_EXACTLY;
61cf2820 327
5d74762d 328 if (item->nowildcard_len < item->len &&
bd30c2e4 329 !git_fnmatch(item, match, name,
8c6abbcd 330 item->nowildcard_len - prefix))
61cf2820
NTND
331 return MATCHED_FNMATCH;
332
75a6315f
BW
333 /* Perform checks to see if "name" is a super set of the pathspec */
334 if (flags & DO_MATCH_SUBMODULE) {
335 /* name is a literal prefix of the pathspec */
336 if ((namelen < matchlen) &&
337 (match[namelen] == '/') &&
338 !ps_strncmp(item, match, name, namelen))
339 return MATCHED_RECURSIVELY;
340
341 /* name" doesn't match up to the first wild character */
342 if (item->nowildcard_len < item->len &&
343 ps_strncmp(item, match, name,
344 item->nowildcard_len - prefix))
345 return 0;
346
347 /*
348 * Here is where we would perform a wildmatch to check if
349 * "name" can be matched as a directory (or a prefix) against
350 * the pathspec. Since wildmatch doesn't have this capability
351 * at the present we have to punt and say that it is a match,
352 * potentially returning a false positive
353 * The submodules themselves will be able to perform more
354 * accurate matching to determine if the pathspec matches.
355 */
356 return MATCHED_RECURSIVELY;
357 }
358
61cf2820
NTND
359 return 0;
360}
361
362/*
52ed1894
AS
363 * Given a name and a list of pathspecs, returns the nature of the
364 * closest (i.e. most specific) match of the name to any of the
365 * pathspecs.
366 *
367 * The caller typically calls this multiple times with the same
368 * pathspec and seen[] array but with different name/namelen
369 * (e.g. entries from the index) and is interested in seeing if and
370 * how each pathspec matches all the names it calls this function
371 * with. A mark is left in the seen[] array for each pathspec element
372 * indicating the closest type of match that element achieved, so if
373 * seen[n] remains zero after multiple invocations, that means the nth
374 * pathspec did not match any names, which could indicate that the
375 * user mistyped the nth pathspec.
61cf2820 376 */
854b0959
NTND
377static int do_match_pathspec(const struct pathspec *ps,
378 const char *name, int namelen,
379 int prefix, char *seen,
42b0874a 380 unsigned flags)
61cf2820 381{
42b0874a 382 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 383
5c6933d2
NTND
384 GUARD_PATHSPEC(ps,
385 PATHSPEC_FROMTOP |
386 PATHSPEC_MAXDEPTH |
bd30c2e4 387 PATHSPEC_LITERAL |
93d93537 388 PATHSPEC_GLOB |
ef79b1f8 389 PATHSPEC_ICASE |
b0db7046
BW
390 PATHSPEC_EXCLUDE |
391 PATHSPEC_ATTR);
8f4f8f45 392
61cf2820 393 if (!ps->nr) {
6330a171
NTND
394 if (!ps->recursive ||
395 !(ps->magic & PATHSPEC_MAXDEPTH) ||
396 ps->max_depth == -1)
61cf2820
NTND
397 return MATCHED_RECURSIVELY;
398
399 if (within_depth(name, namelen, 0, ps->max_depth))
400 return MATCHED_EXACTLY;
401 else
402 return 0;
403 }
404
405 name += prefix;
406 namelen -= prefix;
407
408 for (i = ps->nr - 1; i >= 0; i--) {
409 int how;
ef79b1f8
NTND
410
411 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
412 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
413 continue;
414
61cf2820
NTND
415 if (seen && seen[i] == MATCHED_EXACTLY)
416 continue;
ef79b1f8
NTND
417 /*
418 * Make exclude patterns optional and never report
419 * "pathspec ':(exclude)foo' matches no files"
420 */
421 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
422 seen[i] = MATCHED_FNMATCH;
42b0874a
NTND
423 how = match_pathspec_item(ps->items+i, prefix, name,
424 namelen, flags);
6330a171
NTND
425 if (ps->recursive &&
426 (ps->magic & PATHSPEC_MAXDEPTH) &&
427 ps->max_depth != -1 &&
61cf2820
NTND
428 how && how != MATCHED_FNMATCH) {
429 int len = ps->items[i].len;
430 if (name[len] == '/')
431 len++;
432 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
433 how = MATCHED_EXACTLY;
434 else
435 how = 0;
436 }
437 if (how) {
438 if (retval < how)
439 retval = how;
440 if (seen && seen[i] < how)
441 seen[i] = how;
442 }
443 }
444 return retval;
445}
446
854b0959
NTND
447int match_pathspec(const struct pathspec *ps,
448 const char *name, int namelen,
ae8d0824 449 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
450{
451 int positive, negative;
ae8d0824 452 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
42b0874a
NTND
453 positive = do_match_pathspec(ps, name, namelen,
454 prefix, seen, flags);
ef79b1f8
NTND
455 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
456 return positive;
42b0874a
NTND
457 negative = do_match_pathspec(ps, name, namelen,
458 prefix, seen,
459 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
460 return negative ? 0 : positive;
461}
462
75a6315f
BW
463/**
464 * Check if a submodule is a superset of the pathspec
465 */
466int submodule_path_match(const struct pathspec *ps,
467 const char *submodule_name,
468 char *seen)
469{
470 int matched = do_match_pathspec(ps, submodule_name,
471 strlen(submodule_name),
472 0, seen,
473 DO_MATCH_DIRECTORY |
474 DO_MATCH_SUBMODULE);
475 return matched;
476}
477
777c55a6
JH
478int report_path_error(const char *ps_matched,
479 const struct pathspec *pathspec,
480 const char *prefix)
481{
482 /*
483 * Make sure all pathspec matched; otherwise it is an error.
484 */
777c55a6
JH
485 int num, errors = 0;
486 for (num = 0; num < pathspec->nr; num++) {
487 int other, found_dup;
488
489 if (ps_matched[num])
490 continue;
491 /*
492 * The caller might have fed identical pathspec
493 * twice. Do not barf on such a mistake.
494 * FIXME: parse_pathspec should have eliminated
495 * duplicate pathspec.
496 */
497 for (found_dup = other = 0;
498 !found_dup && other < pathspec->nr;
499 other++) {
500 if (other == num || !ps_matched[other])
501 continue;
502 if (!strcmp(pathspec->items[other].original,
503 pathspec->items[num].original))
504 /*
505 * Ok, we have a match already.
506 */
507 found_dup = 1;
508 }
509 if (found_dup)
510 continue;
511
512 error("pathspec '%s' did not match any file(s) known to git.",
513 pathspec->items[num].original);
514 errors++;
515 }
777c55a6
JH
516 return errors;
517}
518
fcd631ed
NTND
519/*
520 * Return the length of the "simple" part of a path match limiter.
521 */
87323bda 522int simple_length(const char *match)
fcd631ed
NTND
523{
524 int len = -1;
525
526 for (;;) {
527 unsigned char c = *match++;
528 len++;
529 if (c == '\0' || is_glob_special(c))
530 return len;
531 }
532}
533
87323bda 534int no_wildcard(const char *string)
68492fc7 535{
fcd631ed 536 return string[simple_length(string)] == '\0';
68492fc7
LK
537}
538
82dce998
NTND
539void parse_exclude_pattern(const char **pattern,
540 int *patternlen,
f8708998 541 unsigned *flags,
82dce998 542 int *nowildcardlen)
84460eec
NTND
543{
544 const char *p = *pattern;
545 size_t i, len;
546
547 *flags = 0;
548 if (*p == '!') {
549 *flags |= EXC_FLAG_NEGATIVE;
550 p++;
551 }
552 len = strlen(p);
553 if (len && p[len - 1] == '/') {
554 len--;
555 *flags |= EXC_FLAG_MUSTBEDIR;
556 }
557 for (i = 0; i < len; i++) {
558 if (p[i] == '/')
559 break;
560 }
561 if (i == len)
562 *flags |= EXC_FLAG_NODIR;
563 *nowildcardlen = simple_length(p);
564 /*
565 * we should have excluded the trailing slash from 'p' too,
566 * but that's one more allocation. Instead just make sure
567 * nowildcardlen does not exceed real patternlen
568 */
569 if (*nowildcardlen > len)
570 *nowildcardlen = len;
571 if (*p == '*' && no_wildcard(p + 1))
572 *flags |= EXC_FLAG_ENDSWITH;
573 *pattern = p;
574 *patternlen = len;
575}
576
453ec4bd 577void add_exclude(const char *string, const char *base,
c04318e4 578 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 579{
d6b8fc30 580 struct exclude *x;
84460eec 581 int patternlen;
f8708998 582 unsigned flags;
84460eec 583 int nowildcardlen;
453ec4bd 584
84460eec
NTND
585 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
586 if (flags & EXC_FLAG_MUSTBEDIR) {
96ffc06f 587 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
d6b8fc30
JH
588 } else {
589 x = xmalloc(sizeof(*x));
590 x->pattern = string;
591 }
84460eec
NTND
592 x->patternlen = patternlen;
593 x->nowildcardlen = nowildcardlen;
453ec4bd
LT
594 x->base = base;
595 x->baselen = baselen;
d6b8fc30 596 x->flags = flags;
c04318e4 597 x->srcpos = srcpos;
840fc334
AS
598 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
599 el->excludes[el->nr++] = x;
c04318e4 600 x->el = el;
453ec4bd
LT
601}
602
6f52b741
BW
603static void *read_skip_worktree_file_from_index(const struct index_state *istate,
604 const char *path, size_t *size,
55fe6f51 605 struct sha1_stat *sha1_stat)
c28b3d6e
NTND
606{
607 int pos, len;
608 unsigned long sz;
609 enum object_type type;
610 void *data;
c28b3d6e
NTND
611
612 len = strlen(path);
6f52b741 613 pos = index_name_pos(istate, path, len);
c28b3d6e
NTND
614 if (pos < 0)
615 return NULL;
6f52b741 616 if (!ce_skip_worktree(istate->cache[pos]))
c28b3d6e 617 return NULL;
6f52b741 618 data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz);
c28b3d6e
NTND
619 if (!data || type != OBJ_BLOB) {
620 free(data);
621 return NULL;
622 }
623 *size = xsize_t(sz);
55fe6f51
NTND
624 if (sha1_stat) {
625 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
6f52b741 626 hashcpy(sha1_stat->sha1, istate->cache[pos]->oid.hash);
55fe6f51 627 }
c28b3d6e
NTND
628 return data;
629}
630
f6198812
AS
631/*
632 * Frees memory within el which was allocated for exclude patterns and
633 * the file buffer. Does not free el itself.
634 */
635void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
636{
637 int i;
638
5cee3493 639 for (i = 0; i < el->nr; i++)
0fd0e241
NTND
640 free(el->excludes[i]);
641 free(el->excludes);
c082df24 642 free(el->filebuf);
0fd0e241 643
2653a8c6 644 memset(el, 0, sizeof(*el));
0fd0e241
NTND
645}
646
7e2e4b37 647static void trim_trailing_spaces(char *buf)
16402b99 648{
e61a6c1d
PB
649 char *p, *last_space = NULL;
650
651 for (p = buf; *p; p++)
652 switch (*p) {
653 case ' ':
654 if (!last_space)
655 last_space = p;
656 break;
657 case '\\':
658 p++;
659 if (!*p)
660 return;
661 /* fallthrough */
662 default:
663 last_space = NULL;
664 }
665
666 if (last_space)
667 *last_space = '\0';
16402b99
NTND
668}
669
0dcb8d7f
NTND
670/*
671 * Given a subdirectory name and "dir" of the current directory,
672 * search the subdir in "dir" and return it, or create a new one if it
673 * does not exist in "dir".
674 *
675 * If "name" has the trailing slash, it'll be excluded in the search.
676 */
677static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
678 struct untracked_cache_dir *dir,
679 const char *name, int len)
680{
681 int first, last;
682 struct untracked_cache_dir *d;
683 if (!dir)
684 return NULL;
685 if (len && name[len - 1] == '/')
686 len--;
687 first = 0;
688 last = dir->dirs_nr;
689 while (last > first) {
690 int cmp, next = (last + first) >> 1;
691 d = dir->dirs[next];
692 cmp = strncmp(name, d->name, len);
693 if (!cmp && strlen(d->name) > len)
694 cmp = -1;
695 if (!cmp)
696 return d;
697 if (cmp < 0) {
698 last = next;
699 continue;
700 }
701 first = next+1;
702 }
703
704 uc->dir_created++;
96ffc06f 705 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
706
707 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
708 memmove(dir->dirs + first + 1, dir->dirs + first,
709 (dir->dirs_nr - first) * sizeof(*dir->dirs));
710 dir->dirs_nr++;
711 dir->dirs[first] = d;
712 return d;
713}
714
ccad261f
NTND
715static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
716{
717 int i;
718 dir->valid = 0;
719 dir->untracked_nr = 0;
720 for (i = 0; i < dir->dirs_nr; i++)
721 do_invalidate_gitignore(dir->dirs[i]);
722}
723
724static void invalidate_gitignore(struct untracked_cache *uc,
725 struct untracked_cache_dir *dir)
726{
727 uc->gitignore_invalidated++;
728 do_invalidate_gitignore(dir);
729}
730
91a2288b
NTND
731static void invalidate_directory(struct untracked_cache *uc,
732 struct untracked_cache_dir *dir)
733{
26cb0182 734 int i;
91a2288b
NTND
735 uc->dir_invalidated++;
736 dir->valid = 0;
737 dir->untracked_nr = 0;
26cb0182
NTND
738 for (i = 0; i < dir->dirs_nr; i++)
739 dir->dirs[i]->recurse = 0;
91a2288b
NTND
740}
741
55fe6f51
NTND
742/*
743 * Given a file with name "fname", read it (either from disk, or from
473e3930 744 * an index if 'istate' is non-null), parse it and store the
55fe6f51
NTND
745 * exclude rules in "el".
746 *
747 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
748 * stat data from disk (only valid if add_excludes returns zero). If
749 * ss_valid is non-zero, "ss" must contain good value as input.
750 */
751static int add_excludes(const char *fname, const char *base, int baselen,
473e3930
BW
752 struct exclude_list *el,
753 struct index_state *istate,
55fe6f51 754 struct sha1_stat *sha1_stat)
453ec4bd 755{
c470701a 756 struct stat st;
c04318e4 757 int fd, i, lineno = 1;
9d14017a 758 size_t size = 0;
453ec4bd
LT
759 char *buf, *entry;
760
761 fd = open(fname, O_RDONLY);
c28b3d6e 762 if (fd < 0 || fstat(fd, &st) < 0) {
11dc1fcb
NTND
763 if (fd < 0)
764 warn_on_fopen_errors(fname);
765 else
c28b3d6e 766 close(fd);
473e3930
BW
767 if (!istate ||
768 (buf = read_skip_worktree_file_from_index(istate, fname, &size, sha1_stat)) == NULL)
c28b3d6e 769 return -1;
45d76f17
NTND
770 if (size == 0) {
771 free(buf);
772 return 0;
773 }
774 if (buf[size-1] != '\n') {
50a6c8ef 775 buf = xrealloc(buf, st_add(size, 1));
45d76f17
NTND
776 buf[size++] = '\n';
777 }
d961baa8 778 } else {
c28b3d6e
NTND
779 size = xsize_t(st.st_size);
780 if (size == 0) {
55fe6f51
NTND
781 if (sha1_stat) {
782 fill_stat_data(&sha1_stat->stat, &st);
783 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
784 sha1_stat->valid = 1;
785 }
c28b3d6e
NTND
786 close(fd);
787 return 0;
788 }
3733e694 789 buf = xmallocz(size);
c28b3d6e 790 if (read_in_full(fd, buf, size) != size) {
45d76f17 791 free(buf);
c28b3d6e
NTND
792 close(fd);
793 return -1;
794 }
45d76f17 795 buf[size++] = '\n';
c28b3d6e 796 close(fd);
55fe6f51
NTND
797 if (sha1_stat) {
798 int pos;
799 if (sha1_stat->valid &&
473e3930 800 !match_stat_data_racy(istate, &sha1_stat->stat, &st))
55fe6f51 801 ; /* no content change, ss->sha1 still good */
473e3930
BW
802 else if (istate &&
803 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 &&
804 !ce_stage(istate->cache[pos]) &&
805 ce_uptodate(istate->cache[pos]) &&
82b474e0 806 !would_convert_to_git(istate, fname))
99d1a986 807 hashcpy(sha1_stat->sha1,
473e3930 808 istate->cache[pos]->oid.hash);
55fe6f51
NTND
809 else
810 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
811 fill_stat_data(&sha1_stat->stat, &st);
812 sha1_stat->valid = 1;
813 }
6ba78238 814 }
453ec4bd 815
c082df24 816 el->filebuf = buf;
245e1c19 817
dde843e7
JH
818 if (skip_utf8_bom(&buf, size))
819 size -= buf - el->filebuf;
820
453ec4bd 821 entry = buf;
245e1c19 822
45d76f17
NTND
823 for (i = 0; i < size; i++) {
824 if (buf[i] == '\n') {
453ec4bd
LT
825 if (entry != buf + i && entry[0] != '#') {
826 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 827 trim_trailing_spaces(entry);
c04318e4 828 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 829 }
c04318e4 830 lineno++;
453ec4bd
LT
831 entry = buf + i + 1;
832 }
833 }
834 return 0;
453ec4bd
LT
835}
836
55fe6f51
NTND
837int add_excludes_from_file_to_list(const char *fname, const char *base,
838 int baselen, struct exclude_list *el,
473e3930 839 struct index_state *istate)
55fe6f51 840{
473e3930 841 return add_excludes(fname, base, baselen, el, istate, NULL);
55fe6f51
NTND
842}
843
c04318e4
AS
844struct exclude_list *add_exclude_list(struct dir_struct *dir,
845 int group_type, const char *src)
c082df24
AS
846{
847 struct exclude_list *el;
848 struct exclude_list_group *group;
849
850 group = &dir->exclude_list_group[group_type];
851 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
852 el = &group->el[group->nr++];
853 memset(el, 0, sizeof(*el));
c04318e4 854 el->src = src;
c082df24
AS
855 return el;
856}
857
858/*
859 * Used to set up core.excludesfile and .git/info/exclude lists.
860 */
0dcb8d7f
NTND
861static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
862 struct sha1_stat *sha1_stat)
453ec4bd 863{
c082df24 864 struct exclude_list *el;
ccad261f
NTND
865 /*
866 * catch setup_standard_excludes() that's called before
867 * dir->untracked is assigned. That function behaves
868 * differently when dir->untracked is non-NULL.
869 */
870 if (!dir->untracked)
871 dir->unmanaged_exclude_files++;
c04318e4 872 el = add_exclude_list(dir, EXC_FILE, fname);
473e3930 873 if (add_excludes(fname, "", 0, el, NULL, sha1_stat) < 0)
453ec4bd
LT
874 die("cannot use %s as an exclude file", fname);
875}
876
0dcb8d7f
NTND
877void add_excludes_from_file(struct dir_struct *dir, const char *fname)
878{
ccad261f 879 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
880 add_excludes_from_file_1(dir, fname, NULL);
881}
882
82dce998
NTND
883int match_basename(const char *basename, int basenamelen,
884 const char *pattern, int prefix, int patternlen,
f8708998 885 unsigned flags)
593cb880
NTND
886{
887 if (prefix == patternlen) {
0b6e56df 888 if (patternlen == basenamelen &&
ba0897e6 889 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
890 return 1;
891 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 892 /* "*literal" matching against "fooliteral" */
593cb880 893 if (patternlen - 1 <= basenamelen &&
ba0897e6 894 !fspathncmp(pattern + 1,
0b6e56df
JH
895 basename + basenamelen - (patternlen - 1),
896 patternlen - 1))
593cb880
NTND
897 return 1;
898 } else {
0b6e56df
JH
899 if (fnmatch_icase_mem(pattern, patternlen,
900 basename, basenamelen,
901 0) == 0)
593cb880
NTND
902 return 1;
903 }
904 return 0;
905}
906
82dce998
NTND
907int match_pathname(const char *pathname, int pathlen,
908 const char *base, int baselen,
909 const char *pattern, int prefix, int patternlen,
f8708998 910 unsigned flags)
b5592632
NTND
911{
912 const char *name;
913 int namelen;
914
915 /*
916 * match with FNM_PATHNAME; the pattern has base implicitly
917 * in front of it.
918 */
919 if (*pattern == '/') {
920 pattern++;
982ac873 921 patternlen--;
b5592632
NTND
922 prefix--;
923 }
924
925 /*
926 * baselen does not count the trailing slash. base[] may or
927 * may not end with a trailing slash though.
928 */
929 if (pathlen < baselen + 1 ||
930 (baselen && pathname[baselen] != '/') ||
ba0897e6 931 fspathncmp(pathname, base, baselen))
b5592632
NTND
932 return 0;
933
934 namelen = baselen ? pathlen - baselen - 1 : pathlen;
935 name = pathname + pathlen - namelen;
936
937 if (prefix) {
938 /*
939 * if the non-wildcard part is longer than the
940 * remaining pathname, surely it cannot match.
941 */
942 if (prefix > namelen)
943 return 0;
944
ba0897e6 945 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
946 return 0;
947 pattern += prefix;
ab3aebc1 948 patternlen -= prefix;
b5592632
NTND
949 name += prefix;
950 namelen -= prefix;
ab3aebc1
JK
951
952 /*
953 * If the whole pattern did not have a wildcard,
954 * then our prefix match is all we need; we
955 * do not need to call fnmatch at all.
956 */
5cee3493 957 if (!patternlen && !namelen)
ab3aebc1 958 return 1;
b5592632
NTND
959 }
960
ab3aebc1
JK
961 return fnmatch_icase_mem(pattern, patternlen,
962 name, namelen,
f30366b2 963 WM_PATHNAME) == 0;
b5592632
NTND
964}
965
578cd7c3
AS
966/*
967 * Scan the given exclude list in reverse to see whether pathname
968 * should be ignored. The first match (i.e. the last on the list), if
969 * any, determines the fate. Returns the exclude_list element which
970 * matched, or NULL for undecided.
453ec4bd 971 */
578cd7c3
AS
972static struct exclude *last_exclude_matching_from_list(const char *pathname,
973 int pathlen,
974 const char *basename,
975 int *dtype,
2b70e88d
BW
976 struct exclude_list *el,
977 struct index_state *istate)
453ec4bd 978{
e6efecc4 979 struct exclude *exc = NULL; /* undecided */
5cee3493 980 int i;
453ec4bd 981
35a94d44 982 if (!el->nr)
578cd7c3 983 return NULL; /* undefined */
d6b8fc30 984
35a94d44
NTND
985 for (i = el->nr - 1; 0 <= i; i--) {
986 struct exclude *x = el->excludes[i];
b5592632 987 const char *exclude = x->pattern;
b5592632 988 int prefix = x->nowildcardlen;
35a94d44
NTND
989
990 if (x->flags & EXC_FLAG_MUSTBEDIR) {
991 if (*dtype == DT_UNKNOWN)
2b70e88d 992 *dtype = get_dtype(NULL, istate, pathname, pathlen);
35a94d44
NTND
993 if (*dtype != DT_DIR)
994 continue;
995 }
d6b8fc30 996
35a94d44 997 if (x->flags & EXC_FLAG_NODIR) {
593cb880
NTND
998 if (match_basename(basename,
999 pathlen - (basename - pathname),
1000 exclude, prefix, x->patternlen,
e6efecc4
NTND
1001 x->flags)) {
1002 exc = x;
1003 break;
1004 }
35a94d44
NTND
1005 continue;
1006 }
1007
b5592632
NTND
1008 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
1009 if (match_pathname(pathname, pathlen,
1010 x->base, x->baselen ? x->baselen - 1 : 0,
e6efecc4
NTND
1011 exclude, prefix, x->patternlen, x->flags)) {
1012 exc = x;
1013 break;
1014 }
453ec4bd 1015 }
e6efecc4 1016 return exc;
578cd7c3
AS
1017}
1018
1019/*
1020 * Scan the list and let the last match determine the fate.
1021 * Return 1 for exclude, 0 for include and -1 for undecided.
1022 */
1023int is_excluded_from_list(const char *pathname,
1024 int pathlen, const char *basename, int *dtype,
fba92be8 1025 struct exclude_list *el, struct index_state *istate)
578cd7c3
AS
1026{
1027 struct exclude *exclude;
fba92be8
BW
1028 exclude = last_exclude_matching_from_list(pathname, pathlen, basename,
1029 dtype, el, istate);
578cd7c3
AS
1030 if (exclude)
1031 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1032 return -1; /* undecided */
1033}
1034
46aa2f95 1035static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
2b70e88d 1036 struct index_state *istate,
46aa2f95
KB
1037 const char *pathname, int pathlen, const char *basename,
1038 int *dtype_p)
1039{
1040 int i, j;
1041 struct exclude_list_group *group;
1042 struct exclude *exclude;
1043 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
1044 group = &dir->exclude_list_group[i];
1045 for (j = group->nr - 1; j >= 0; j--) {
1046 exclude = last_exclude_matching_from_list(
1047 pathname, pathlen, basename, dtype_p,
2b70e88d 1048 &group->el[j], istate);
46aa2f95
KB
1049 if (exclude)
1050 return exclude;
1051 }
1052 }
1053 return NULL;
1054}
1055
6cd5c582
KB
1056/*
1057 * Loads the per-directory exclude list for the substring of base
1058 * which has a char length of baselen.
1059 */
e799ed40
BW
1060static void prep_exclude(struct dir_struct *dir,
1061 struct index_state *istate,
1062 const char *base, int baselen)
6cd5c582
KB
1063{
1064 struct exclude_list_group *group;
1065 struct exclude_list *el;
1066 struct exclude_stack *stk = NULL;
0dcb8d7f 1067 struct untracked_cache_dir *untracked;
6cd5c582
KB
1068 int current;
1069
6cd5c582
KB
1070 group = &dir->exclude_list_group[EXC_DIRS];
1071
d961baa8
NTND
1072 /*
1073 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 1074 * which originate from directories not in the prefix of the
d961baa8
NTND
1075 * path being checked.
1076 */
6cd5c582
KB
1077 while ((stk = dir->exclude_stack) != NULL) {
1078 if (stk->baselen <= baselen &&
aceb9429 1079 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
1080 break;
1081 el = &group->el[dir->exclude_stack->exclude_ix];
1082 dir->exclude_stack = stk->prev;
95c6f271 1083 dir->exclude = NULL;
aceb9429 1084 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
1085 clear_exclude_list(el);
1086 free(stk);
1087 group->nr--;
1088 }
1089
95c6f271
KB
1090 /* Skip traversing into sub directories if the parent is excluded */
1091 if (dir->exclude)
1092 return;
1093
aceb9429
NTND
1094 /*
1095 * Lazy initialization. All call sites currently just
1096 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1097 * them seems lots of work for little benefit.
1098 */
1099 if (!dir->basebuf.buf)
1100 strbuf_init(&dir->basebuf, PATH_MAX);
1101
6cd5c582
KB
1102 /* Read from the parent directories and push them down. */
1103 current = stk ? stk->baselen : -1;
aceb9429 1104 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1105 if (dir->untracked)
1106 untracked = stk ? stk->ucd : dir->untracked->root;
1107 else
1108 untracked = NULL;
1109
6cd5c582 1110 while (current < baselen) {
6cd5c582 1111 const char *cp;
0dcb8d7f 1112 struct sha1_stat sha1_stat;
6cd5c582 1113
03e11a71 1114 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1115 if (current < 0) {
1116 cp = base;
1117 current = 0;
d961baa8 1118 } else {
6cd5c582
KB
1119 cp = strchr(base + current + 1, '/');
1120 if (!cp)
1121 die("oops in prep_exclude");
1122 cp++;
0dcb8d7f
NTND
1123 untracked =
1124 lookup_untracked(dir->untracked, untracked,
1125 base + current,
1126 cp - base - current);
6cd5c582
KB
1127 }
1128 stk->prev = dir->exclude_stack;
1129 stk->baselen = cp - base;
95c6f271 1130 stk->exclude_ix = group->nr;
0dcb8d7f 1131 stk->ucd = untracked;
95c6f271 1132 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1133 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1134 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1135
1136 /* Abort if the directory is excluded */
1137 if (stk->baselen) {
1138 int dt = DT_DIR;
aceb9429 1139 dir->basebuf.buf[stk->baselen - 1] = 0;
95c6f271 1140 dir->exclude = last_exclude_matching_from_lists(dir,
e799ed40 1141 istate,
aceb9429
NTND
1142 dir->basebuf.buf, stk->baselen - 1,
1143 dir->basebuf.buf + current, &dt);
1144 dir->basebuf.buf[stk->baselen - 1] = '/';
c3c327de
KB
1145 if (dir->exclude &&
1146 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1147 dir->exclude = NULL;
95c6f271 1148 if (dir->exclude) {
95c6f271
KB
1149 dir->exclude_stack = stk;
1150 return;
1151 }
1152 }
1153
aceb9429 1154 /* Try to read per-directory file */
0dcb8d7f
NTND
1155 hashclr(sha1_stat.sha1);
1156 sha1_stat.valid = 0;
27b099ae
NTND
1157 if (dir->exclude_per_dir &&
1158 /*
1159 * If we know that no files have been added in
1160 * this directory (i.e. valid_cached_dir() has
1161 * been executed and set untracked->valid) ..
1162 */
1163 (!untracked || !untracked->valid ||
1164 /*
1165 * .. and .gitignore does not exist before
7687252f
DT
1166 * (i.e. null exclude_sha1). Then we can skip
1167 * loading .gitignore, which would result in
1168 * ENOENT anyway.
27b099ae
NTND
1169 */
1170 !is_null_sha1(untracked->exclude_sha1))) {
95c6f271
KB
1171 /*
1172 * dir->basebuf gets reused by the traversal, but we
1173 * need fname to remain unchanged to ensure the src
1174 * member of each struct exclude correctly
1175 * back-references its source file. Other invocations
1176 * of add_exclude_list provide stable strings, so we
aceb9429 1177 * strbuf_detach() and free() here in the caller.
95c6f271 1178 */
aceb9429
NTND
1179 struct strbuf sb = STRBUF_INIT;
1180 strbuf_addbuf(&sb, &dir->basebuf);
1181 strbuf_addstr(&sb, dir->exclude_per_dir);
1182 el->src = strbuf_detach(&sb, NULL);
e799ed40 1183 add_excludes(el->src, el->src, stk->baselen, el, istate,
0dcb8d7f
NTND
1184 untracked ? &sha1_stat : NULL);
1185 }
5ebf79ad
NTND
1186 /*
1187 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1188 * will first be called in valid_cached_dir() then maybe many
1189 * times more in last_exclude_matching(). When the cache is
1190 * used, last_exclude_matching() will not be called and
1191 * reading .gitignore content will be a waste.
1192 *
1193 * So when it's called by valid_cached_dir() and we can get
1194 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1195 * modified on work tree), we could delay reading the
1196 * .gitignore content until we absolutely need it in
1197 * last_exclude_matching(). Be careful about ignore rule
1198 * order, though, if you do that.
1199 */
1200 if (untracked &&
1201 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1202 invalidate_gitignore(dir->untracked, untracked);
0dcb8d7f 1203 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
95c6f271 1204 }
6cd5c582
KB
1205 dir->exclude_stack = stk;
1206 current = stk->baselen;
1207 }
aceb9429 1208 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1209}
1210
f4cd69a6
AS
1211/*
1212 * Loads the exclude lists for the directory containing pathname, then
1213 * scans all exclude lists to determine whether pathname is excluded.
1214 * Returns the exclude_list element which matched, or NULL for
1215 * undecided.
1216 */
b07bc8c8 1217struct exclude *last_exclude_matching(struct dir_struct *dir,
a0bba65b
BW
1218 struct index_state *istate,
1219 const char *pathname,
1220 int *dtype_p)
453ec4bd
LT
1221{
1222 int pathlen = strlen(pathname);
68492fc7
LK
1223 const char *basename = strrchr(pathname, '/');
1224 basename = (basename) ? basename+1 : pathname;
453ec4bd 1225
a0bba65b 1226 prep_exclude(dir, istate, pathname, basename-pathname);
c082df24 1227
95c6f271
KB
1228 if (dir->exclude)
1229 return dir->exclude;
1230
a0bba65b 1231 return last_exclude_matching_from_lists(dir, istate, pathname, pathlen,
46aa2f95 1232 basename, dtype_p);
f4cd69a6
AS
1233}
1234
1235/*
1236 * Loads the exclude lists for the directory containing pathname, then
1237 * scans all exclude lists to determine whether pathname is excluded.
1238 * Returns 1 if true, otherwise 0.
1239 */
a0bba65b
BW
1240int is_excluded(struct dir_struct *dir, struct index_state *istate,
1241 const char *pathname, int *dtype_p)
f4cd69a6
AS
1242{
1243 struct exclude *exclude =
a0bba65b 1244 last_exclude_matching(dir, istate, pathname, dtype_p);
f4cd69a6
AS
1245 if (exclude)
1246 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1247 return 0;
1248}
1249
f3fa1838
JH
1250static struct dir_entry *dir_entry_new(const char *pathname, int len)
1251{
453ec4bd
LT
1252 struct dir_entry *ent;
1253
96ffc06f 1254 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1255 ent->len = len;
4d06f8ac 1256 return ent;
453ec4bd
LT
1257}
1258
9e58beca
BW
1259static struct dir_entry *dir_add_name(struct dir_struct *dir,
1260 struct index_state *istate,
1261 const char *pathname, int len)
6815e569 1262{
9e58beca 1263 if (index_file_exists(istate, pathname, len, ignore_case))
6815e569
JK
1264 return NULL;
1265
25fd2f7a 1266 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1267 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1268}
1269
9e58beca
BW
1270struct dir_entry *dir_add_ignored(struct dir_struct *dir,
1271 struct index_state *istate,
1272 const char *pathname, int len)
2abd31b0 1273{
9e58beca 1274 if (!index_name_is_other(istate, pathname, len))
2abd31b0
JK
1275 return NULL;
1276
25fd2f7a 1277 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1278 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1279}
1280
09595258
LT
1281enum exist_status {
1282 index_nonexistent = 0,
1283 index_directory,
4b05548f 1284 index_gitdir
09595258
LT
1285};
1286
5102c617 1287/*
71261027 1288 * Do not use the alphabetically sorted index to look up
5102c617 1289 * the directory name; instead, use the case insensitive
ebbd7439 1290 * directory hash.
5102c617 1291 */
ae520e36
BW
1292static enum exist_status directory_exists_in_index_icase(struct index_state *istate,
1293 const char *dirname, int len)
5102c617 1294{
41284eb0 1295 struct cache_entry *ce;
5102c617 1296
ae520e36 1297 if (index_dir_exists(istate, dirname, len))
5102c617
JJ
1298 return index_directory;
1299
ae520e36 1300 ce = index_file_exists(istate, dirname, len, ignore_case);
41284eb0 1301 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1302 return index_gitdir;
1303
5102c617
JJ
1304 return index_nonexistent;
1305}
1306
09595258
LT
1307/*
1308 * The index sorts alphabetically by entry name, which
1309 * means that a gitlink sorts as '\0' at the end, while
1310 * a directory (which is defined not as an entry, but as
1311 * the files it contains) will sort with the '/' at the
1312 * end.
1313 */
ae520e36
BW
1314static enum exist_status directory_exists_in_index(struct index_state *istate,
1315 const char *dirname, int len)
453ec4bd 1316{
5102c617
JJ
1317 int pos;
1318
1319 if (ignore_case)
ae520e36 1320 return directory_exists_in_index_icase(istate, dirname, len);
5102c617 1321
ae520e36 1322 pos = index_name_pos(istate, dirname, len);
09595258
LT
1323 if (pos < 0)
1324 pos = -pos-1;
ae520e36
BW
1325 while (pos < istate->cache_nr) {
1326 const struct cache_entry *ce = istate->cache[pos++];
09595258
LT
1327 unsigned char endchar;
1328
1329 if (strncmp(ce->name, dirname, len))
1330 break;
1331 endchar = ce->name[len];
1332 if (endchar > '/')
1333 break;
1334 if (endchar == '/')
1335 return index_directory;
7a51ed66 1336 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1337 return index_gitdir;
1338 }
1339 return index_nonexistent;
1340}
1341
1342/*
1343 * When we find a directory when traversing the filesystem, we
1344 * have three distinct cases:
1345 *
1346 * - ignore it
1347 * - see it as a directory
1348 * - recurse into it
1349 *
1350 * and which one we choose depends on a combination of existing
1351 * git index contents and the flags passed into the directory
1352 * traversal routine.
1353 *
1354 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1355 * directory name, we always recurse into the directory to see
1356 * all the files.
09595258
LT
1357 *
1358 * Case 2: If we *already* have that directory name as a gitlink,
1359 * we always continue to see it as a gitlink, regardless of whether
1360 * there is an actual git directory there or not (it might not
1361 * be checked out as a subproject!)
1362 *
1363 * Case 3: if we didn't have it in the index previously, we
1364 * have a few sub-cases:
1365 *
1366 * (a) if "show_other_directories" is true, we show it as
1367 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1368 * also true, in which case we need to check if it contains any
1369 * untracked and / or ignored files.
09595258 1370 * (b) if it looks like a git directory, and we don't have
302b9282 1371 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1372 * as a directory.
1373 * (c) otherwise, we recurse into it.
1374 */
defd7c7b 1375static enum path_treatment treat_directory(struct dir_struct *dir,
0ef8e169 1376 struct index_state *istate,
0dcb8d7f 1377 struct untracked_cache_dir *untracked,
2e5910f2 1378 const char *dirname, int len, int baselen, int exclude,
e1b8c7bd 1379 const struct pathspec *pathspec)
09595258
LT
1380{
1381 /* The "len-1" is to strip the final '/' */
0ef8e169 1382 switch (directory_exists_in_index(istate, dirname, len-1)) {
09595258 1383 case index_directory:
defd7c7b 1384 return path_recurse;
09595258
LT
1385
1386 case index_gitdir:
26c986e1 1387 return path_none;
09595258
LT
1388
1389 case index_nonexistent:
7c4c97c0 1390 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1391 break;
7c4c97c0 1392 if (!(dir->flags & DIR_NO_GITLINKS)) {
09595258
LT
1393 unsigned char sha1[20];
1394 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
defd7c7b 1395 return path_untracked;
09595258 1396 }
defd7c7b 1397 return path_recurse;
09595258
LT
1398 }
1399
1400 /* This is the "show_other_directories" case */
721ac4ed 1401
184d2a8e 1402 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1403 return exclude ? path_excluded : path_untracked;
1404
2e5910f2
DT
1405 untracked = lookup_untracked(dir->untracked, untracked,
1406 dirname + baselen, len - baselen);
0ef8e169 1407 return read_directory_recursive(dir, istate, dirname, len,
e1b8c7bd 1408 untracked, 1, pathspec);
453ec4bd
LT
1409}
1410
9fc42d60
LT
1411/*
1412 * This is an inexact early pruning of any recursive directory
1413 * reading - if the path cannot possibly be in the pathspec,
1414 * return true, and we'll skip it early.
1415 */
e1b8c7bd
BW
1416static int simplify_away(const char *path, int pathlen,
1417 const struct pathspec *pathspec)
9fc42d60 1418{
e1b8c7bd 1419 int i;
9fc42d60 1420
e1b8c7bd
BW
1421 if (!pathspec || !pathspec->nr)
1422 return 0;
1423
1424 GUARD_PATHSPEC(pathspec,
1425 PATHSPEC_FROMTOP |
1426 PATHSPEC_MAXDEPTH |
1427 PATHSPEC_LITERAL |
1428 PATHSPEC_GLOB |
1429 PATHSPEC_ICASE |
b0db7046
BW
1430 PATHSPEC_EXCLUDE |
1431 PATHSPEC_ATTR);
e1b8c7bd
BW
1432
1433 for (i = 0; i < pathspec->nr; i++) {
1434 const struct pathspec_item *item = &pathspec->items[i];
1435 int len = item->nowildcard_len;
1436
1437 if (len > pathlen)
1438 len = pathlen;
1439 if (!ps_strncmp(item, item->match, path, len))
1440 return 0;
9fc42d60 1441 }
e1b8c7bd
BW
1442
1443 return 1;
9fc42d60
LT
1444}
1445
29209cbe
JK
1446/*
1447 * This function tells us whether an excluded path matches a
1448 * list of "interesting" pathspecs. That is, whether a path matched
1449 * by any of the pathspecs could possibly be ignored by excluding
1450 * the specified path. This can happen if:
1451 *
1452 * 1. the path is mentioned explicitly in the pathspec
1453 *
1454 * 2. the path is a directory prefix of some element in the
1455 * pathspec
1456 */
e1b8c7bd
BW
1457static int exclude_matches_pathspec(const char *path, int pathlen,
1458 const struct pathspec *pathspec)
1459{
1460 int i;
1461
1462 if (!pathspec || !pathspec->nr)
1463 return 0;
1464
1465 GUARD_PATHSPEC(pathspec,
1466 PATHSPEC_FROMTOP |
1467 PATHSPEC_MAXDEPTH |
1468 PATHSPEC_LITERAL |
1469 PATHSPEC_GLOB |
1470 PATHSPEC_ICASE |
1471 PATHSPEC_EXCLUDE);
1472
1473 for (i = 0; i < pathspec->nr; i++) {
1474 const struct pathspec_item *item = &pathspec->items[i];
1475 int len = item->nowildcard_len;
1476
1477 if (len == pathlen &&
1478 !ps_strncmp(item, item->match, path, pathlen))
1479 return 1;
1480 if (len > pathlen &&
1481 item->match[pathlen] == '/' &&
1482 !ps_strncmp(item, item->match, path, pathlen))
1483 return 1;
e96980ef
JK
1484 }
1485 return 0;
1486}
1487
98f2a687
BW
1488static int get_index_dtype(struct index_state *istate,
1489 const char *path, int len)
443e061a
LT
1490{
1491 int pos;
9c5e6c80 1492 const struct cache_entry *ce;
443e061a 1493
98f2a687 1494 ce = index_file_exists(istate, path, len, 0);
443e061a
LT
1495 if (ce) {
1496 if (!ce_uptodate(ce))
1497 return DT_UNKNOWN;
1498 if (S_ISGITLINK(ce->ce_mode))
1499 return DT_DIR;
1500 /*
1501 * Nobody actually cares about the
1502 * difference between DT_LNK and DT_REG
1503 */
1504 return DT_REG;
1505 }
1506
1507 /* Try to look it up as a directory */
98f2a687 1508 pos = index_name_pos(istate, path, len);
443e061a
LT
1509 if (pos >= 0)
1510 return DT_UNKNOWN;
1511 pos = -pos-1;
98f2a687
BW
1512 while (pos < istate->cache_nr) {
1513 ce = istate->cache[pos++];
443e061a
LT
1514 if (strncmp(ce->name, path, len))
1515 break;
1516 if (ce->name[len] > '/')
1517 break;
1518 if (ce->name[len] < '/')
1519 continue;
1520 if (!ce_uptodate(ce))
1521 break; /* continue? */
1522 return DT_DIR;
1523 }
1524 return DT_UNKNOWN;
1525}
1526
98f2a687
BW
1527static int get_dtype(struct dirent *de, struct index_state *istate,
1528 const char *path, int len)
07134421 1529{
6831a88a 1530 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1531 struct stat st;
1532
1533 if (dtype != DT_UNKNOWN)
1534 return dtype;
98f2a687 1535 dtype = get_index_dtype(istate, path, len);
443e061a
LT
1536 if (dtype != DT_UNKNOWN)
1537 return dtype;
1538 if (lstat(path, &st))
07134421
LT
1539 return dtype;
1540 if (S_ISREG(st.st_mode))
1541 return DT_REG;
1542 if (S_ISDIR(st.st_mode))
1543 return DT_DIR;
1544 if (S_ISLNK(st.st_mode))
1545 return DT_LNK;
1546 return dtype;
1547}
1548
16e2cfa9 1549static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1550 struct untracked_cache_dir *untracked,
0ef8e169 1551 struct index_state *istate,
49dc2cc2 1552 struct strbuf *path,
2e5910f2 1553 int baselen,
e1b8c7bd 1554 const struct pathspec *pathspec,
16e2cfa9 1555 int dtype, struct dirent *de)
53cc5356 1556{
8aaf8d77 1557 int exclude;
0ef8e169 1558 int has_path_in_index = !!index_file_exists(istate, path->buf, path->len, ignore_case);
2eac2a4c 1559
8aaf8d77 1560 if (dtype == DT_UNKNOWN)
0ef8e169 1561 dtype = get_dtype(de, istate, path->buf, path->len);
8aaf8d77
KB
1562
1563 /* Always exclude indexed files */
2eac2a4c 1564 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1565 return path_none;
8aaf8d77 1566
2eac2a4c
JH
1567 /*
1568 * When we are looking at a directory P in the working tree,
1569 * there are three cases:
1570 *
1571 * (1) P exists in the index. Everything inside the directory P in
1572 * the working tree needs to go when P is checked out from the
1573 * index.
1574 *
1575 * (2) P does not exist in the index, but there is P/Q in the index.
1576 * We know P will stay a directory when we check out the contents
1577 * of the index, but we do not know yet if there is a directory
1578 * P/Q in the working tree to be killed, so we need to recurse.
1579 *
1580 * (3) P does not exist in the index, and there is no P/Q in the index
1581 * to require P to be a directory, either. Only in this case, we
1582 * know that everything inside P will not be killed without
1583 * recursing.
1584 */
1585 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1586 (dtype == DT_DIR) &&
de372b1b 1587 !has_path_in_index &&
0ef8e169 1588 (directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent))
de372b1b 1589 return path_none;
8aaf8d77 1590
0ef8e169 1591 exclude = is_excluded(dir, istate, path->buf, &dtype);
53cc5356
JH
1592
1593 /*
1594 * Excluded? If we don't explicitly want to show
1595 * ignored files, ignore it
1596 */
0aaf62b6 1597 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1598 return path_excluded;
53cc5356 1599
53cc5356
JH
1600 switch (dtype) {
1601 default:
defd7c7b 1602 return path_none;
53cc5356 1603 case DT_DIR:
49dc2cc2 1604 strbuf_addch(path, '/');
0ef8e169 1605 return treat_directory(dir, istate, untracked, path->buf, path->len,
e1b8c7bd 1606 baselen, exclude, pathspec);
53cc5356
JH
1607 case DT_REG:
1608 case DT_LNK:
defd7c7b 1609 return exclude ? path_excluded : path_untracked;
53cc5356 1610 }
53cc5356
JH
1611}
1612
91a2288b
NTND
1613static enum path_treatment treat_path_fast(struct dir_struct *dir,
1614 struct untracked_cache_dir *untracked,
1615 struct cached_dir *cdir,
0ef8e169 1616 struct index_state *istate,
91a2288b
NTND
1617 struct strbuf *path,
1618 int baselen,
e1b8c7bd 1619 const struct pathspec *pathspec)
91a2288b
NTND
1620{
1621 strbuf_setlen(path, baselen);
1622 if (!cdir->ucd) {
1623 strbuf_addstr(path, cdir->file);
1624 return path_untracked;
1625 }
1626 strbuf_addstr(path, cdir->ucd->name);
1627 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1628 strbuf_complete(path, '/');
91a2288b
NTND
1629 if (cdir->ucd->check_only)
1630 /*
1631 * check_only is set as a result of treat_directory() getting
1632 * to its bottom. Verify again the same set of directories
1633 * with check_only set.
1634 */
0ef8e169 1635 return read_directory_recursive(dir, istate, path->buf, path->len,
e1b8c7bd 1636 cdir->ucd, 1, pathspec);
91a2288b
NTND
1637 /*
1638 * We get path_recurse in the first run when
1639 * directory_exists_in_index() returns index_nonexistent. We
1640 * are sure that new changes in the index does not impact the
1641 * outcome. Return now.
1642 */
1643 return path_recurse;
1644}
1645
16e2cfa9 1646static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1647 struct untracked_cache_dir *untracked,
cf7c6148 1648 struct cached_dir *cdir,
0ef8e169 1649 struct index_state *istate,
49dc2cc2 1650 struct strbuf *path,
16e2cfa9 1651 int baselen,
e1b8c7bd 1652 const struct pathspec *pathspec)
16e2cfa9
JH
1653{
1654 int dtype;
cf7c6148 1655 struct dirent *de = cdir->de;
16e2cfa9 1656
91a2288b 1657 if (!de)
0ef8e169 1658 return treat_path_fast(dir, untracked, cdir, istate, path,
e1b8c7bd 1659 baselen, pathspec);
16e2cfa9 1660 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
defd7c7b 1661 return path_none;
49dc2cc2
RS
1662 strbuf_setlen(path, baselen);
1663 strbuf_addstr(path, de->d_name);
e1b8c7bd 1664 if (simplify_away(path->buf, path->len, pathspec))
defd7c7b 1665 return path_none;
16e2cfa9
JH
1666
1667 dtype = DTYPE(de);
0ef8e169 1668 return treat_one_path(dir, untracked, istate, path, baselen, pathspec, dtype, de);
0dcb8d7f
NTND
1669}
1670
1671static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1672{
1673 if (!dir)
1674 return;
1675 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1676 dir->untracked_alloc);
1677 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1678}
1679
91a2288b
NTND
1680static int valid_cached_dir(struct dir_struct *dir,
1681 struct untracked_cache_dir *untracked,
207a06ce 1682 struct index_state *istate,
91a2288b
NTND
1683 struct strbuf *path,
1684 int check_only)
1685{
1686 struct stat st;
1687
1688 if (!untracked)
1689 return 0;
1690
1691 if (stat(path->len ? path->buf : ".", &st)) {
1692 invalidate_directory(dir->untracked, untracked);
1693 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1694 return 0;
1695 }
1696 if (!untracked->valid ||
207a06ce 1697 match_stat_data_racy(istate, &untracked->stat_data, &st)) {
91a2288b
NTND
1698 if (untracked->valid)
1699 invalidate_directory(dir->untracked, untracked);
1700 fill_stat_data(&untracked->stat_data, &st);
1701 return 0;
1702 }
1703
1704 if (untracked->check_only != !!check_only) {
1705 invalidate_directory(dir->untracked, untracked);
1706 return 0;
1707 }
1708
1709 /*
1710 * prep_exclude will be called eventually on this directory,
1711 * but it's called much later in last_exclude_matching(). We
1712 * need it now to determine the validity of the cache for this
1713 * path. The next calls will be nearly no-op, the way
1714 * prep_exclude() is designed.
1715 */
1716 if (path->len && path->buf[path->len - 1] != '/') {
1717 strbuf_addch(path, '/');
207a06ce 1718 prep_exclude(dir, istate, path->buf, path->len);
91a2288b
NTND
1719 strbuf_setlen(path, path->len - 1);
1720 } else
207a06ce 1721 prep_exclude(dir, istate, path->buf, path->len);
91a2288b
NTND
1722
1723 /* hopefully prep_exclude() haven't invalidated this entry... */
1724 return untracked->valid;
1725}
1726
cf7c6148
NTND
1727static int open_cached_dir(struct cached_dir *cdir,
1728 struct dir_struct *dir,
1729 struct untracked_cache_dir *untracked,
207a06ce 1730 struct index_state *istate,
cf7c6148
NTND
1731 struct strbuf *path,
1732 int check_only)
1733{
1734 memset(cdir, 0, sizeof(*cdir));
1735 cdir->untracked = untracked;
207a06ce 1736 if (valid_cached_dir(dir, untracked, istate, path, check_only))
91a2288b 1737 return 0;
cf7c6148 1738 cdir->fdir = opendir(path->len ? path->buf : ".");
91a2288b
NTND
1739 if (dir->untracked)
1740 dir->untracked->dir_opened++;
cf7c6148
NTND
1741 if (!cdir->fdir)
1742 return -1;
1743 return 0;
1744}
1745
1746static int read_cached_dir(struct cached_dir *cdir)
1747{
1748 if (cdir->fdir) {
1749 cdir->de = readdir(cdir->fdir);
1750 if (!cdir->de)
1751 return -1;
1752 return 0;
1753 }
91a2288b
NTND
1754 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1755 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1756 if (!d->recurse) {
1757 cdir->nr_dirs++;
1758 continue;
1759 }
91a2288b
NTND
1760 cdir->ucd = d;
1761 cdir->nr_dirs++;
1762 return 0;
1763 }
1764 cdir->ucd = NULL;
1765 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1766 struct untracked_cache_dir *d = cdir->untracked;
1767 cdir->file = d->untracked[cdir->nr_files++];
1768 return 0;
1769 }
cf7c6148
NTND
1770 return -1;
1771}
1772
1773static void close_cached_dir(struct cached_dir *cdir)
1774{
1775 if (cdir->fdir)
1776 closedir(cdir->fdir);
91a2288b
NTND
1777 /*
1778 * We have gone through this directory and found no untracked
1779 * entries. Mark it valid.
1780 */
26cb0182 1781 if (cdir->untracked) {
91a2288b 1782 cdir->untracked->valid = 1;
26cb0182
NTND
1783 cdir->untracked->recurse = 1;
1784 }
16e2cfa9
JH
1785}
1786
453ec4bd
LT
1787/*
1788 * Read a directory tree. We currently ignore anything but
1789 * directories, regular files and symlinks. That's because git
1790 * doesn't handle them at all yet. Maybe that will change some
1791 * day.
1792 *
1793 * Also, we ignore the name ".git" (even if it is not a directory).
1794 * That likely will not change.
defd7c7b
KB
1795 *
1796 * Returns the most significant path_treatment value encountered in the scan.
453ec4bd 1797 */
defd7c7b 1798static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0ef8e169
BW
1799 struct index_state *istate, const char *base, int baselen,
1800 struct untracked_cache_dir *untracked, int check_only,
1801 const struct pathspec *pathspec)
453ec4bd 1802{
cf7c6148 1803 struct cached_dir cdir;
defd7c7b 1804 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1805 struct strbuf path = STRBUF_INIT;
453ec4bd 1806
bef36921 1807 strbuf_add(&path, base, baselen);
02cb6753 1808
0ef8e169 1809 if (open_cached_dir(&cdir, dir, untracked, istate, &path, check_only))
1528d247
RS
1810 goto out;
1811
0dcb8d7f
NTND
1812 if (untracked)
1813 untracked->check_only = !!check_only;
1814
cf7c6148 1815 while (!read_cached_dir(&cdir)) {
defd7c7b 1816 /* check how the file or directory should be treated */
0ef8e169 1817 state = treat_path(dir, untracked, &cdir, istate, &path,
e1b8c7bd 1818 baselen, pathspec);
0dcb8d7f 1819
defd7c7b
KB
1820 if (state > dir_state)
1821 dir_state = state;
1822
1823 /* recurse into subdir if instructed by treat_path */
df5bcdf8
SL
1824 if ((state == path_recurse) ||
1825 ((state == path_untracked) &&
1826 (dir->flags & DIR_SHOW_IGNORED_TOO) &&
f4fd99bf 1827 (get_dtype(cdir.de, istate, path.buf, path.len) == DT_DIR))) {
0dcb8d7f
NTND
1828 struct untracked_cache_dir *ud;
1829 ud = lookup_untracked(dir->untracked, untracked,
1830 path.buf + baselen,
1831 path.len - baselen);
1832 subdir_state =
0ef8e169 1833 read_directory_recursive(dir, istate, path.buf,
e1b8c7bd
BW
1834 path.len, ud,
1835 check_only, pathspec);
defd7c7b
KB
1836 if (subdir_state > dir_state)
1837 dir_state = subdir_state;
1838 }
1839
1840 if (check_only) {
1841 /* abort early if maximum state has been reached */
0dcb8d7f 1842 if (dir_state == path_untracked) {
91a2288b 1843 if (cdir.fdir)
0dcb8d7f 1844 add_untracked(untracked, path.buf + baselen);
defd7c7b 1845 break;
0dcb8d7f 1846 }
defd7c7b 1847 /* skip the dir_add_* part */
02cb6753 1848 continue;
453ec4bd 1849 }
defd7c7b
KB
1850
1851 /* add the path to the appropriate result list */
1852 switch (state) {
1853 case path_excluded:
1854 if (dir->flags & DIR_SHOW_IGNORED)
0ef8e169 1855 dir_add_name(dir, istate, path.buf, path.len);
0aaf62b6
KB
1856 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1857 ((dir->flags & DIR_COLLECT_IGNORED) &&
1858 exclude_matches_pathspec(path.buf, path.len,
e1b8c7bd 1859 pathspec)))
0ef8e169 1860 dir_add_ignored(dir, istate, path.buf, path.len);
defd7c7b
KB
1861 break;
1862
1863 case path_untracked:
0dcb8d7f
NTND
1864 if (dir->flags & DIR_SHOW_IGNORED)
1865 break;
0ef8e169 1866 dir_add_name(dir, istate, path.buf, path.len);
91a2288b 1867 if (cdir.fdir)
0dcb8d7f 1868 add_untracked(untracked, path.buf + baselen);
1528d247 1869 break;
defd7c7b
KB
1870
1871 default:
1872 break;
1873 }
453ec4bd 1874 }
cf7c6148 1875 close_cached_dir(&cdir);
1528d247 1876 out:
bef36921 1877 strbuf_release(&path);
453ec4bd 1878
defd7c7b 1879 return dir_state;
453ec4bd
LT
1880}
1881
bbf504a9 1882int cmp_dir_entry(const void *p1, const void *p2)
453ec4bd
LT
1883{
1884 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1885 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1886
ccdd4a0f 1887 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
1888}
1889
fb898888 1890/* check if *out lexically strictly contains *in */
bbf504a9 1891int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in)
fb898888
SL
1892{
1893 return (out->len < in->len) &&
1894 (out->name[out->len - 1] == '/') &&
1895 !memcmp(out->name, in->name, out->len);
1896}
1897
48ffef96 1898static int treat_leading_path(struct dir_struct *dir,
0ef8e169 1899 struct index_state *istate,
48ffef96 1900 const char *path, int len,
e1b8c7bd 1901 const struct pathspec *pathspec)
48ffef96 1902{
49dc2cc2
RS
1903 struct strbuf sb = STRBUF_INIT;
1904 int baselen, rc = 0;
48ffef96 1905 const char *cp;
be8a84c5 1906 int old_flags = dir->flags;
48ffef96
JH
1907
1908 while (len && path[len - 1] == '/')
1909 len--;
1910 if (!len)
1911 return 1;
1912 baselen = 0;
be8a84c5 1913 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
1914 while (1) {
1915 cp = path + baselen + !!baselen;
1916 cp = memchr(cp, '/', path + len - cp);
1917 if (!cp)
1918 baselen = len;
1919 else
1920 baselen = cp - path;
49dc2cc2
RS
1921 strbuf_setlen(&sb, 0);
1922 strbuf_add(&sb, path, baselen);
1923 if (!is_directory(sb.buf))
1924 break;
e1b8c7bd 1925 if (simplify_away(sb.buf, sb.len, pathspec))
49dc2cc2 1926 break;
0ef8e169 1927 if (treat_one_path(dir, NULL, istate, &sb, baselen, pathspec,
defd7c7b 1928 DT_DIR, NULL) == path_none)
49dc2cc2
RS
1929 break; /* do not recurse into it */
1930 if (len <= baselen) {
1931 rc = 1;
1932 break; /* finished checking */
1933 }
48ffef96 1934 }
49dc2cc2 1935 strbuf_release(&sb);
be8a84c5 1936 dir->flags = old_flags;
49dc2cc2 1937 return rc;
48ffef96
JH
1938}
1939
1e8fef60
NTND
1940static const char *get_ident_string(void)
1941{
1942 static struct strbuf sb = STRBUF_INIT;
1943 struct utsname uts;
1944
1945 if (sb.len)
1946 return sb.buf;
100e4337 1947 if (uname(&uts) < 0)
1e8fef60 1948 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
1949 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
1950 uts.sysname);
1e8fef60
NTND
1951 return sb.buf;
1952}
1953
1954static int ident_in_untracked(const struct untracked_cache *uc)
1955{
0e0f7618
CC
1956 /*
1957 * Previous git versions may have saved many NUL separated
1958 * strings in the "ident" field, but it is insane to manage
1959 * many locations, so just take care of the first one.
1960 */
1e8fef60 1961
0e0f7618 1962 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
1963}
1964
0e0f7618 1965static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 1966{
0e0f7618 1967 strbuf_reset(&uc->ident);
1e8fef60 1968 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
1969
1970 /*
1971 * This strbuf used to contain a list of NUL separated
1972 * strings, so save NUL too for backward compatibility.
1973 */
1e8fef60
NTND
1974 strbuf_addch(&uc->ident, 0);
1975}
1976
4a4ca479
CC
1977static void new_untracked_cache(struct index_state *istate)
1978{
1979 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
1980 strbuf_init(&uc->ident, 100);
1981 uc->exclude_per_dir = ".gitignore";
1982 /* should be the same flags used by git-status */
1983 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 1984 set_untracked_ident(uc);
4a4ca479 1985 istate->untracked = uc;
0e0f7618 1986 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
1987}
1988
1989void add_untracked_cache(struct index_state *istate)
1990{
1991 if (!istate->untracked) {
1992 new_untracked_cache(istate);
0e0f7618
CC
1993 } else {
1994 if (!ident_in_untracked(istate->untracked)) {
1995 free_untracked_cache(istate->untracked);
1996 new_untracked_cache(istate);
1997 }
1998 }
4a4ca479
CC
1999}
2000
07b29bfd
CC
2001void remove_untracked_cache(struct index_state *istate)
2002{
2003 if (istate->untracked) {
2004 free_untracked_cache(istate->untracked);
2005 istate->untracked = NULL;
2006 istate->cache_changed |= UNTRACKED_CHANGED;
2007 }
2008}
2009
ccad261f
NTND
2010static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
2011 int base_len,
2012 const struct pathspec *pathspec)
2013{
2014 struct untracked_cache_dir *root;
2015
76e6b090 2016 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
ccad261f
NTND
2017 return NULL;
2018
2019 /*
2020 * We only support $GIT_DIR/info/exclude and core.excludesfile
2021 * as the global ignore rule files. Any other additions
2022 * (e.g. from command line) invalidate the cache. This
2023 * condition also catches running setup_standard_excludes()
2024 * before setting dir->untracked!
2025 */
2026 if (dir->unmanaged_exclude_files)
2027 return NULL;
2028
2029 /*
2030 * Optimize for the main use case only: whole-tree git
2031 * status. More work involved in treat_leading_path() if we
2032 * use cache on just a subset of the worktree. pathspec
2033 * support could make the matter even worse.
2034 */
2035 if (base_len || (pathspec && pathspec->nr))
2036 return NULL;
2037
2038 /* Different set of flags may produce different results */
2039 if (dir->flags != dir->untracked->dir_flags ||
2040 /*
2041 * See treat_directory(), case index_nonexistent. Without
2042 * this flag, we may need to also cache .git file content
2043 * for the resolve_gitlink_ref() call, which we don't.
2044 */
2045 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
2046 /* We don't support collecting ignore files */
2047 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
2048 DIR_COLLECT_IGNORED)))
2049 return NULL;
2050
2051 /*
2052 * If we use .gitignore in the cache and now you change it to
2053 * .gitexclude, everything will go wrong.
2054 */
2055 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
2056 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
2057 return NULL;
2058
2059 /*
2060 * EXC_CMDL is not considered in the cache. If people set it,
2061 * skip the cache.
2062 */
2063 if (dir->exclude_list_group[EXC_CMDL].nr)
2064 return NULL;
2065
1e8fef60 2066 if (!ident_in_untracked(dir->untracked)) {
0e0f7618 2067 warning(_("Untracked cache is disabled on this system or location."));
1e8fef60
NTND
2068 return NULL;
2069 }
2070
ccad261f
NTND
2071 if (!dir->untracked->root) {
2072 const int len = sizeof(*dir->untracked->root);
2073 dir->untracked->root = xmalloc(len);
2074 memset(dir->untracked->root, 0, len);
2075 }
2076
2077 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
2078 root = dir->untracked->root;
2079 if (hashcmp(dir->ss_info_exclude.sha1,
2080 dir->untracked->ss_info_exclude.sha1)) {
2081 invalidate_gitignore(dir->untracked, root);
2082 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
2083 }
2084 if (hashcmp(dir->ss_excludes_file.sha1,
2085 dir->untracked->ss_excludes_file.sha1)) {
2086 invalidate_gitignore(dir->untracked, root);
2087 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
2088 }
26cb0182
NTND
2089
2090 /* Make sure this directory is not dropped out at saving phase */
2091 root->recurse = 1;
ccad261f
NTND
2092 return root;
2093}
2094
2c1eb104
BW
2095int read_directory(struct dir_struct *dir, struct index_state *istate,
2096 const char *path, int len, const struct pathspec *pathspec)
9fc42d60 2097{
ccad261f 2098 struct untracked_cache_dir *untracked;
b4189aa8 2099
dba2e203 2100 if (has_symlink_leading_path(path, len))
725b0605
JH
2101 return dir->nr;
2102
ccad261f
NTND
2103 untracked = validate_untracked_cache(dir, len, pathspec);
2104 if (!untracked)
2105 /*
2106 * make sure untracked cache code path is disabled,
2107 * e.g. prep_exclude()
2108 */
2109 dir->untracked = NULL;
2c1eb104
BW
2110 if (!len || treat_leading_path(dir, istate, path, len, pathspec))
2111 read_directory_recursive(dir, istate, path, len, untracked, 0, pathspec);
bbf504a9
SL
2112 QSORT(dir->entries, dir->nr, cmp_dir_entry);
2113 QSORT(dir->ignored, dir->ignored_nr, cmp_dir_entry);
fb898888
SL
2114
2115 /*
2116 * If DIR_SHOW_IGNORED_TOO is set, read_directory_recursive() will
2117 * also pick up untracked contents of untracked dirs; by default
2118 * we discard these, but given DIR_KEEP_UNTRACKED_CONTENTS we do not.
2119 */
2120 if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&
2121 !(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) {
2122 int i, j;
2123
2124 /* remove from dir->entries untracked contents of untracked dirs */
2125 for (i = j = 0; j < dir->nr; j++) {
bbf504a9
SL
2126 if (i &&
2127 check_dir_entry_contains(dir->entries[i - 1], dir->entries[j])) {
6a83d902 2128 FREE_AND_NULL(dir->entries[j]);
fb898888
SL
2129 } else {
2130 dir->entries[i++] = dir->entries[j];
2131 }
2132 }
2133
2134 dir->nr = i;
2135 }
2136
c9ccb5d3
NTND
2137 if (dir->untracked) {
2138 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2139 trace_printf_key(&trace_untracked_stats,
2140 "node creation: %u\n"
2141 "gitignore invalidation: %u\n"
2142 "directory invalidation: %u\n"
2143 "opendir: %u\n",
2144 dir->untracked->dir_created,
2145 dir->untracked->gitignore_invalidated,
2146 dir->untracked->dir_invalidated,
2147 dir->untracked->dir_opened);
2c1eb104 2148 if (dir->untracked == istate->untracked &&
1bbb3dba
NTND
2149 (dir->untracked->dir_opened ||
2150 dir->untracked->gitignore_invalidated ||
2151 dir->untracked->dir_invalidated))
2c1eb104
BW
2152 istate->cache_changed |= UNTRACKED_CHANGED;
2153 if (dir->untracked != istate->untracked) {
6a83d902 2154 FREE_AND_NULL(dir->untracked);
1bbb3dba 2155 }
c9ccb5d3 2156 }
453ec4bd
LT
2157 return dir->nr;
2158}
c91f0d92 2159
686a4a06 2160int file_exists(const char *f)
c91f0d92 2161{
686a4a06 2162 struct stat sb;
a50f9fc5 2163 return lstat(f, &sb) == 0;
c91f0d92 2164}
e6636747 2165
63ec5e1f
JS
2166static int cmp_icase(char a, char b)
2167{
2168 if (a == b)
2169 return 0;
2170 if (ignore_case)
2171 return toupper(a) - toupper(b);
2172 return a - b;
2173}
2174
e6636747 2175/*
9b125da4
NTND
2176 * Given two normalized paths (a trailing slash is ok), if subdir is
2177 * outside dir, return -1. Otherwise return the offset in subdir that
2178 * can be used as relative path to dir.
e6636747 2179 */
9b125da4 2180int dir_inside_of(const char *subdir, const char *dir)
e6636747 2181{
9b125da4 2182 int offset = 0;
e6636747 2183
9b125da4 2184 assert(dir && subdir && *dir && *subdir);
e6636747 2185
63ec5e1f 2186 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2187 dir++;
9b125da4
NTND
2188 subdir++;
2189 offset++;
490544b1 2190 }
9b125da4
NTND
2191
2192 /* hel[p]/me vs hel[l]/yeah */
2193 if (*dir && *subdir)
2194 return -1;
2195
2196 if (!*subdir)
2197 return !*dir ? offset : -1; /* same dir */
2198
2199 /* foo/[b]ar vs foo/[] */
2200 if (is_dir_sep(dir[-1]))
2201 return is_dir_sep(subdir[-1]) ? offset : -1;
2202
2203 /* foo[/]bar vs foo[] */
2204 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2205}
2206
2207int is_inside_dir(const char *dir)
2208{
56b9f6e7
RS
2209 char *cwd;
2210 int rc;
2211
b892913d
NTND
2212 if (!dir)
2213 return 0;
56b9f6e7
RS
2214
2215 cwd = xgetcwd();
2216 rc = (dir_inside_of(cwd, dir) >= 0);
2217 free(cwd);
2218 return rc;
e6636747 2219}
7155b727 2220
55892d23
AP
2221int is_empty_dir(const char *path)
2222{
2223 DIR *dir = opendir(path);
2224 struct dirent *e;
2225 int ret = 1;
2226
2227 if (!dir)
2228 return 0;
2229
2230 while ((e = readdir(dir)) != NULL)
2231 if (!is_dot_or_dotdot(e->d_name)) {
2232 ret = 0;
2233 break;
2234 }
2235
2236 closedir(dir);
2237 return ret;
2238}
2239
ae2f203e 2240static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2241{
a0f4afbe 2242 DIR *dir;
7155b727 2243 struct dirent *e;
ae2f203e 2244 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2245 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2246 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
a0f4afbe 2247 unsigned char submodule_head[20];
7155b727 2248
a0f4afbe 2249 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
ae2f203e 2250 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
a0f4afbe 2251 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2252 if (kept_up)
2253 *kept_up = 1;
a0f4afbe 2254 return 0;
ae2f203e 2255 }
a0f4afbe 2256
ae2f203e 2257 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2258 dir = opendir(path->buf);
c844a803 2259 if (!dir) {
863808cd
MH
2260 if (errno == ENOENT)
2261 return keep_toplevel ? -1 : 0;
2262 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2263 /*
2264 * An empty dir could be removable even if it
2265 * is unreadable:
2266 */
c844a803
JH
2267 return rmdir(path->buf);
2268 else
2269 return -1;
2270 }
00b6c178 2271 strbuf_complete(path, '/');
7155b727
JS
2272
2273 len = path->len;
2274 while ((e = readdir(dir)) != NULL) {
2275 struct stat st;
8ca12c0d
AP
2276 if (is_dot_or_dotdot(e->d_name))
2277 continue;
7155b727
JS
2278
2279 strbuf_setlen(path, len);
2280 strbuf_addstr(path, e->d_name);
863808cd
MH
2281 if (lstat(path->buf, &st)) {
2282 if (errno == ENOENT)
2283 /*
2284 * file disappeared, which is what we
2285 * wanted anyway
2286 */
2287 continue;
2288 /* fall thru */
2289 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2290 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2291 continue; /* happy */
863808cd
MH
2292 } else if (!only_empty &&
2293 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2294 continue; /* happy, too */
863808cd 2295 }
7155b727
JS
2296
2297 /* path too long, stat fails, or non-directory still exists */
2298 ret = -1;
2299 break;
2300 }
2301 closedir(dir);
2302
2303 strbuf_setlen(path, original_len);
ae2f203e 2304 if (!ret && !keep_toplevel && !kept_down)
863808cd 2305 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2306 else if (kept_up)
2307 /*
2308 * report the uplevel that it is not an error that we
2309 * did not rmdir() our directory.
2310 */
2311 *kept_up = !ret;
7155b727
JS
2312 return ret;
2313}
039bc64e 2314
ae2f203e
JH
2315int remove_dir_recursively(struct strbuf *path, int flag)
2316{
2317 return remove_dir_recurse(path, flag, NULL);
2318}
2319
f932729c
JK
2320static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2321
039bc64e
JH
2322void setup_standard_excludes(struct dir_struct *dir)
2323{
039bc64e 2324 dir->exclude_per_dir = ".gitignore";
099d2d86
JH
2325
2326 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2845ce7f
PT
2327 if (!excludes_file)
2328 excludes_file = xdg_config_home("ignore");
4698c8fe 2329 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2330 add_excludes_from_file_1(dir, excludes_file,
2331 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2332
2333 /* per repository user preference */
f0056f64
JK
2334 if (startup_info->have_repository) {
2335 const char *path = git_path_info_exclude();
2336 if (!access_or_warn(path, R_OK, 0))
2337 add_excludes_from_file_1(dir, path,
2338 dir->untracked ? &dir->ss_info_exclude : NULL);
2339 }
039bc64e 2340}
4a92d1bf
AR
2341
2342int remove_path(const char *name)
2343{
2344 char *slash;
2345
c7054209 2346 if (unlink(name) && !is_missing_file_error(errno))
4a92d1bf
AR
2347 return -1;
2348
2349 slash = strrchr(name, '/');
2350 if (slash) {
2351 char *dirs = xstrdup(name);
2352 slash = dirs + (slash - name);
2353 do {
2354 *slash = '\0';
3fc0d131 2355 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2356 free(dirs);
2357 }
2358 return 0;
2359}
2360
270be816
AS
2361/*
2362 * Frees memory within dir which was allocated for exclude lists and
2363 * the exclude_stack. Does not free dir itself.
2364 */
2365void clear_directory(struct dir_struct *dir)
2366{
2367 int i, j;
2368 struct exclude_list_group *group;
2369 struct exclude_list *el;
2370 struct exclude_stack *stk;
2371
2372 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2373 group = &dir->exclude_list_group[i];
2374 for (j = 0; j < group->nr; j++) {
2375 el = &group->el[j];
2376 if (i == EXC_DIRS)
2377 free((char *)el->src);
2378 clear_exclude_list(el);
2379 }
2380 free(group->el);
2381 }
2382
2383 stk = dir->exclude_stack;
2384 while (stk) {
2385 struct exclude_stack *prev = stk->prev;
2386 free(stk);
2387 stk = prev;
2388 }
aceb9429 2389 strbuf_release(&dir->basebuf);
270be816 2390}
83c094ad
NTND
2391
2392struct ondisk_untracked_cache {
2393 struct stat_data info_exclude_stat;
2394 struct stat_data excludes_file_stat;
2395 uint32_t dir_flags;
2396 unsigned char info_exclude_sha1[20];
2397 unsigned char excludes_file_sha1[20];
2398 char exclude_per_dir[FLEX_ARRAY];
2399};
2400
268ba201
RS
2401#define ouc_offset(x) offsetof(struct ondisk_untracked_cache, x)
2402#define ouc_size(len) (ouc_offset(exclude_per_dir) + len + 1)
83c094ad
NTND
2403
2404struct write_data {
2405 int index; /* number of written untracked_cache_dir */
2406 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2407 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2408 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2409 struct strbuf out;
2410 struct strbuf sb_stat;
2411 struct strbuf sb_sha1;
2412};
2413
2414static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2415{
2416 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2417 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2418 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2419 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2420 to->sd_dev = htonl(from->sd_dev);
2421 to->sd_ino = htonl(from->sd_ino);
2422 to->sd_uid = htonl(from->sd_uid);
2423 to->sd_gid = htonl(from->sd_gid);
2424 to->sd_size = htonl(from->sd_size);
2425}
2426
2427static void write_one_dir(struct untracked_cache_dir *untracked,
2428 struct write_data *wd)
2429{
2430 struct stat_data stat_data;
2431 struct strbuf *out = &wd->out;
2432 unsigned char intbuf[16];
2433 unsigned int intlen, value;
2434 int i = wd->index++;
2435
2436 /*
2437 * untracked_nr should be reset whenever valid is clear, but
2438 * for safety..
2439 */
2440 if (!untracked->valid) {
2441 untracked->untracked_nr = 0;
2442 untracked->check_only = 0;
2443 }
2444
2445 if (untracked->check_only)
2446 ewah_set(wd->check_only, i);
2447 if (untracked->valid) {
2448 ewah_set(wd->valid, i);
2449 stat_data_to_disk(&stat_data, &untracked->stat_data);
2450 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2451 }
2452 if (!is_null_sha1(untracked->exclude_sha1)) {
2453 ewah_set(wd->sha1_valid, i);
2454 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2455 }
2456
2457 intlen = encode_varint(untracked->untracked_nr, intbuf);
2458 strbuf_add(out, intbuf, intlen);
2459
2460 /* skip non-recurse directories */
2461 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2462 if (untracked->dirs[i]->recurse)
2463 value++;
2464 intlen = encode_varint(value, intbuf);
2465 strbuf_add(out, intbuf, intlen);
2466
2467 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2468
2469 for (i = 0; i < untracked->untracked_nr; i++)
2470 strbuf_add(out, untracked->untracked[i],
2471 strlen(untracked->untracked[i]) + 1);
2472
2473 for (i = 0; i < untracked->dirs_nr; i++)
2474 if (untracked->dirs[i]->recurse)
2475 write_one_dir(untracked->dirs[i], wd);
2476}
2477
2478void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2479{
2480 struct ondisk_untracked_cache *ouc;
2481 struct write_data wd;
2482 unsigned char varbuf[16];
e0b83735
JK
2483 int varint_len;
2484 size_t len = strlen(untracked->exclude_per_dir);
2485
2486 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
83c094ad
NTND
2487 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2488 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2489 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2490 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2491 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2492
2493 varint_len = encode_varint(untracked->ident.len, varbuf);
2494 strbuf_add(out, varbuf, varint_len);
8109984d 2495 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2496
83c094ad 2497 strbuf_add(out, ouc, ouc_size(len));
6a83d902 2498 FREE_AND_NULL(ouc);
83c094ad
NTND
2499
2500 if (!untracked->root) {
2501 varint_len = encode_varint(0, varbuf);
2502 strbuf_add(out, varbuf, varint_len);
2503 return;
2504 }
2505
2506 wd.index = 0;
2507 wd.check_only = ewah_new();
2508 wd.valid = ewah_new();
2509 wd.sha1_valid = ewah_new();
2510 strbuf_init(&wd.out, 1024);
2511 strbuf_init(&wd.sb_stat, 1024);
2512 strbuf_init(&wd.sb_sha1, 1024);
2513 write_one_dir(untracked->root, &wd);
2514
2515 varint_len = encode_varint(wd.index, varbuf);
2516 strbuf_add(out, varbuf, varint_len);
2517 strbuf_addbuf(out, &wd.out);
2518 ewah_serialize_strbuf(wd.valid, out);
2519 ewah_serialize_strbuf(wd.check_only, out);
2520 ewah_serialize_strbuf(wd.sha1_valid, out);
2521 strbuf_addbuf(out, &wd.sb_stat);
2522 strbuf_addbuf(out, &wd.sb_sha1);
2523 strbuf_addch(out, '\0'); /* safe guard for string lists */
2524
2525 ewah_free(wd.valid);
2526 ewah_free(wd.check_only);
2527 ewah_free(wd.sha1_valid);
2528 strbuf_release(&wd.out);
2529 strbuf_release(&wd.sb_stat);
2530 strbuf_release(&wd.sb_sha1);
2531}
f9e6c649
NTND
2532
2533static void free_untracked(struct untracked_cache_dir *ucd)
2534{
2535 int i;
2536 if (!ucd)
2537 return;
2538 for (i = 0; i < ucd->dirs_nr; i++)
2539 free_untracked(ucd->dirs[i]);
2540 for (i = 0; i < ucd->untracked_nr; i++)
2541 free(ucd->untracked[i]);
2542 free(ucd->untracked);
2543 free(ucd->dirs);
2544 free(ucd);
2545}
2546
2547void free_untracked_cache(struct untracked_cache *uc)
2548{
2549 if (uc)
2550 free_untracked(uc->root);
2551 free(uc);
2552}
2553
2554struct read_data {
2555 int index;
2556 struct untracked_cache_dir **ucd;
2557 struct ewah_bitmap *check_only;
2558 struct ewah_bitmap *valid;
2559 struct ewah_bitmap *sha1_valid;
2560 const unsigned char *data;
2561 const unsigned char *end;
2562};
2563
268ba201 2564static void stat_data_from_disk(struct stat_data *to, const unsigned char *data)
f9e6c649 2565{
268ba201
RS
2566 memcpy(to, data, sizeof(*to));
2567 to->sd_ctime.sec = ntohl(to->sd_ctime.sec);
2568 to->sd_ctime.nsec = ntohl(to->sd_ctime.nsec);
2569 to->sd_mtime.sec = ntohl(to->sd_mtime.sec);
2570 to->sd_mtime.nsec = ntohl(to->sd_mtime.nsec);
2571 to->sd_dev = ntohl(to->sd_dev);
2572 to->sd_ino = ntohl(to->sd_ino);
2573 to->sd_uid = ntohl(to->sd_uid);
2574 to->sd_gid = ntohl(to->sd_gid);
2575 to->sd_size = ntohl(to->sd_size);
f9e6c649
NTND
2576}
2577
2578static int read_one_dir(struct untracked_cache_dir **untracked_,
2579 struct read_data *rd)
2580{
2581 struct untracked_cache_dir ud, *untracked;
2582 const unsigned char *next, *data = rd->data, *end = rd->end;
2583 unsigned int value;
2584 int i, len;
2585
2586 memset(&ud, 0, sizeof(ud));
2587
2588 next = data;
2589 value = decode_varint(&next);
2590 if (next > end)
2591 return -1;
2592 ud.recurse = 1;
2593 ud.untracked_alloc = value;
2594 ud.untracked_nr = value;
2595 if (ud.untracked_nr)
b32fa95f 2596 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649
NTND
2597 data = next;
2598
2599 next = data;
2600 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2601 if (next > end)
2602 return -1;
b32fa95f 2603 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649
NTND
2604 data = next;
2605
2606 len = strlen((const char *)data);
2607 next = data + len + 1;
2608 if (next > rd->end)
2609 return -1;
50a6c8ef 2610 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));
f9e6c649
NTND
2611 memcpy(untracked, &ud, sizeof(ud));
2612 memcpy(untracked->name, data, len + 1);
2613 data = next;
2614
2615 for (i = 0; i < untracked->untracked_nr; i++) {
2616 len = strlen((const char *)data);
2617 next = data + len + 1;
2618 if (next > rd->end)
2619 return -1;
2620 untracked->untracked[i] = xstrdup((const char*)data);
2621 data = next;
2622 }
2623
2624 rd->ucd[rd->index++] = untracked;
2625 rd->data = data;
2626
2627 for (i = 0; i < untracked->dirs_nr; i++) {
2628 len = read_one_dir(untracked->dirs + i, rd);
2629 if (len < 0)
2630 return -1;
2631 }
2632 return 0;
2633}
2634
2635static void set_check_only(size_t pos, void *cb)
2636{
2637 struct read_data *rd = cb;
2638 struct untracked_cache_dir *ud = rd->ucd[pos];
2639 ud->check_only = 1;
2640}
2641
2642static void read_stat(size_t pos, void *cb)
2643{
2644 struct read_data *rd = cb;
2645 struct untracked_cache_dir *ud = rd->ucd[pos];
2646 if (rd->data + sizeof(struct stat_data) > rd->end) {
2647 rd->data = rd->end + 1;
2648 return;
2649 }
268ba201 2650 stat_data_from_disk(&ud->stat_data, rd->data);
f9e6c649
NTND
2651 rd->data += sizeof(struct stat_data);
2652 ud->valid = 1;
2653}
2654
2655static void read_sha1(size_t pos, void *cb)
2656{
2657 struct read_data *rd = cb;
2658 struct untracked_cache_dir *ud = rd->ucd[pos];
2659 if (rd->data + 20 > rd->end) {
2660 rd->data = rd->end + 1;
2661 return;
2662 }
2663 hashcpy(ud->exclude_sha1, rd->data);
2664 rd->data += 20;
2665}
2666
2667static void load_sha1_stat(struct sha1_stat *sha1_stat,
268ba201 2668 const unsigned char *data,
f9e6c649
NTND
2669 const unsigned char *sha1)
2670{
268ba201 2671 stat_data_from_disk(&sha1_stat->stat, data);
f9e6c649
NTND
2672 hashcpy(sha1_stat->sha1, sha1);
2673 sha1_stat->valid = 1;
2674}
2675
2676struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2677{
f9e6c649
NTND
2678 struct untracked_cache *uc;
2679 struct read_data rd;
2680 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60
NTND
2681 const char *ident;
2682 int ident_len, len;
268ba201 2683 const char *exclude_per_dir;
f9e6c649
NTND
2684
2685 if (sz <= 1 || end[-1] != '\0')
2686 return NULL;
2687 end--;
2688
1e8fef60
NTND
2689 ident_len = decode_varint(&next);
2690 if (next + ident_len > end)
2691 return NULL;
2692 ident = (const char *)next;
2693 next += ident_len;
2694
f9e6c649
NTND
2695 if (next + ouc_size(0) > end)
2696 return NULL;
2697
2698 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2699 strbuf_init(&uc->ident, ident_len);
2700 strbuf_add(&uc->ident, ident, ident_len);
268ba201
RS
2701 load_sha1_stat(&uc->ss_info_exclude,
2702 next + ouc_offset(info_exclude_stat),
2703 next + ouc_offset(info_exclude_sha1));
2704 load_sha1_stat(&uc->ss_excludes_file,
2705 next + ouc_offset(excludes_file_stat),
2706 next + ouc_offset(excludes_file_sha1));
2707 uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
2708 exclude_per_dir = (const char *)next + ouc_offset(exclude_per_dir);
2709 uc->exclude_per_dir = xstrdup(exclude_per_dir);
f9e6c649 2710 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
268ba201 2711 next += ouc_size(strlen(exclude_per_dir));
f9e6c649
NTND
2712 if (next >= end)
2713 goto done2;
2714
2715 len = decode_varint(&next);
2716 if (next > end || len == 0)
2717 goto done2;
2718
2719 rd.valid = ewah_new();
2720 rd.check_only = ewah_new();
2721 rd.sha1_valid = ewah_new();
2722 rd.data = next;
2723 rd.end = end;
2724 rd.index = 0;
b32fa95f 2725 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2726
2727 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2728 goto done;
2729
2730 next = rd.data;
2731 len = ewah_read_mmap(rd.valid, next, end - next);
2732 if (len < 0)
2733 goto done;
2734
2735 next += len;
2736 len = ewah_read_mmap(rd.check_only, next, end - next);
2737 if (len < 0)
2738 goto done;
2739
2740 next += len;
2741 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2742 if (len < 0)
2743 goto done;
2744
2745 ewah_each_bit(rd.check_only, set_check_only, &rd);
2746 rd.data = next + len;
2747 ewah_each_bit(rd.valid, read_stat, &rd);
2748 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2749 next = rd.data;
2750
2751done:
2752 free(rd.ucd);
2753 ewah_free(rd.valid);
2754 ewah_free(rd.check_only);
2755 ewah_free(rd.sha1_valid);
2756done2:
2757 if (next != end) {
2758 free_untracked_cache(uc);
2759 uc = NULL;
2760 }
2761 return uc;
2762}
e931371a 2763
73f9145f
NTND
2764static void invalidate_one_directory(struct untracked_cache *uc,
2765 struct untracked_cache_dir *ucd)
2766{
2767 uc->dir_invalidated++;
2768 ucd->valid = 0;
2769 ucd->untracked_nr = 0;
2770}
2771
2772/*
2773 * Normally when an entry is added or removed from a directory,
2774 * invalidating that directory is enough. No need to touch its
2775 * ancestors. When a directory is shown as "foo/bar/" in git-status
2776 * however, deleting or adding an entry may have cascading effect.
2777 *
2778 * Say the "foo/bar/file" has become untracked, we need to tell the
2779 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2780 * directory any more (because "bar" is managed by foo as an untracked
2781 * "file").
2782 *
2783 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2784 * was the last untracked entry in the entire "foo", we should show
2785 * "foo/" instead. Which means we have to invalidate past "bar" up to
2786 * "foo".
2787 *
2788 * This function traverses all directories from root to leaf. If there
2789 * is a chance of one of the above cases happening, we invalidate back
2790 * to root. Otherwise we just invalidate the leaf. There may be a more
2791 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2792 * detect these cases and avoid unnecessary invalidation, for example,
2793 * checking for the untracked entry named "bar/" in "foo", but for now
2794 * stick to something safe and simple.
2795 */
2796static int invalidate_one_component(struct untracked_cache *uc,
2797 struct untracked_cache_dir *dir,
2798 const char *path, int len)
2799{
2800 const char *rest = strchr(path, '/');
2801
2802 if (rest) {
2803 int component_len = rest - path;
2804 struct untracked_cache_dir *d =
2805 lookup_untracked(uc, dir, path, component_len);
2806 int ret =
2807 invalidate_one_component(uc, d, rest + 1,
2808 len - (component_len + 1));
2809 if (ret)
2810 invalidate_one_directory(uc, dir);
2811 return ret;
2812 }
2813
2814 invalidate_one_directory(uc, dir);
2815 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2816}
2817
e931371a
NTND
2818void untracked_cache_invalidate_path(struct index_state *istate,
2819 const char *path)
2820{
e931371a
NTND
2821 if (!istate->untracked || !istate->untracked->root)
2822 return;
73f9145f
NTND
2823 invalidate_one_component(istate->untracked, istate->untracked->root,
2824 path, strlen(path));
e931371a
NTND
2825}
2826
2827void untracked_cache_remove_from_index(struct index_state *istate,
2828 const char *path)
2829{
2830 untracked_cache_invalidate_path(istate, path);
2831}
2832
2833void untracked_cache_add_to_index(struct index_state *istate,
2834 const char *path)
2835{
2836 untracked_cache_invalidate_path(istate, path);
2837}
47e83eb3
SB
2838
2839/* Update gitfile and core.worktree setting to connect work tree and git dir */
2840void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
2841{
365444a6
SB
2842 struct strbuf gitfile_sb = STRBUF_INIT;
2843 struct strbuf cfg_sb = STRBUF_INIT;
47e83eb3 2844 struct strbuf rel_path = STRBUF_INIT;
365444a6 2845 char *git_dir, *work_tree;
47e83eb3 2846
365444a6
SB
2847 /* Prepare .git file */
2848 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);
2849 if (safe_create_leading_directories_const(gitfile_sb.buf))
2850 die(_("could not create directories for %s"), gitfile_sb.buf);
2851
2852 /* Prepare config file */
2853 strbuf_addf(&cfg_sb, "%s/config", git_dir_);
2854 if (safe_create_leading_directories_const(cfg_sb.buf))
2855 die(_("could not create directories for %s"), cfg_sb.buf);
47e83eb3 2856
e394fa01
JH
2857 git_dir = real_pathdup(git_dir_, 1);
2858 work_tree = real_pathdup(work_tree_, 1);
365444a6
SB
2859
2860 /* Write .git file */
2861 write_file(gitfile_sb.buf, "gitdir: %s",
2862 relative_path(git_dir, work_tree, &rel_path));
47e83eb3 2863 /* Update core.worktree setting */
365444a6 2864 git_config_set_in_file(cfg_sb.buf, "core.worktree",
47e83eb3
SB
2865 relative_path(work_tree, git_dir, &rel_path));
2866
365444a6
SB
2867 strbuf_release(&gitfile_sb);
2868 strbuf_release(&cfg_sb);
47e83eb3
SB
2869 strbuf_release(&rel_path);
2870 free(work_tree);
2871 free(git_dir);
2872}
f6f85861
SB
2873
2874/*
2875 * Migrate the git directory of the given path from old_git_dir to new_git_dir.
2876 */
2877void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
2878{
2879 if (rename(old_git_dir, new_git_dir) < 0)
2880 die_errno(_("could not migrate git directory from '%s' to '%s'"),
2881 old_git_dir, new_git_dir);
2882
2883 connect_work_tree_and_git_dir(path, new_git_dir);
2884}