treewide: rename 'struct exclude' to 'struct path_pattern'
[git/git.git] / dir.c
CommitLineData
453ec4bd
LT
1/*
2 * This handles recursive filename detection with exclude
3 * files, index knowledge etc..
4 *
95a68344
AS
5 * See Documentation/technical/api-directory-listing.txt
6 *
453ec4bd
LT
7 * Copyright (C) Linus Torvalds, 2005-2006
8 * Junio Hamano, 2005-2006
9 */
453ec4bd 10#include "cache.h"
b2141fc1 11#include "config.h"
453ec4bd 12#include "dir.h"
cbd53a21 13#include "object-store.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"
883e248b 21#include "fsmonitor.h"
da62f786 22#include "submodule-config.h"
453ec4bd 23
defd7c7b
KB
24/*
25 * Tells read_directory_recursive how a file or directory should be treated.
26 * Values are ordered by significance, e.g. if a directory contains both
27 * excluded and untracked files, it is listed as untracked because
28 * path_untracked > path_excluded.
29 */
30enum path_treatment {
31 path_none = 0,
32 path_recurse,
33 path_excluded,
34 path_untracked
35};
36
cf7c6148
NTND
37/*
38 * Support data structure for our opendir/readdir/closedir wrappers
39 */
40struct cached_dir {
41 DIR *fdir;
42 struct untracked_cache_dir *untracked;
91a2288b
NTND
43 int nr_files;
44 int nr_dirs;
45
cf7c6148 46 struct dirent *de;
91a2288b
NTND
47 const char *file;
48 struct untracked_cache_dir *ucd;
cf7c6148
NTND
49};
50
defd7c7b 51static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0ef8e169
BW
52 struct index_state *istate, const char *path, int len,
53 struct untracked_cache_dir *untracked,
5aaa7fd3 54 int check_only, int stop_at_first_file, const struct pathspec *pathspec);
98f2a687
BW
55static int get_dtype(struct dirent *de, struct index_state *istate,
56 const char *path, int len);
09595258 57
e0556a92
PC
58int count_slashes(const char *s)
59{
60 int cnt = 0;
61 while (*s)
62 if (*s++ == '/')
63 cnt++;
64 return cnt;
65}
66
ba0897e6 67int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
68{
69 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
70}
71
ba0897e6 72int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
73{
74 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
75}
76
1f26ce61
CB
77int git_fnmatch(const struct pathspec_item *item,
78 const char *pattern, const char *string,
79 int prefix)
5d74762d 80{
5d74762d 81 if (prefix > 0) {
93d93537 82 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 83 return WM_NOMATCH;
5d74762d
NTND
84 pattern += prefix;
85 string += prefix;
86 }
bd30c2e4 87 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
88 int pattern_len = strlen(++pattern);
89 int string_len = strlen(string);
90 return string_len < pattern_len ||
93d93537
NTND
91 ps_strcmp(item, pattern,
92 string + string_len - pattern_len);
8c6abbcd 93 }
bd30c2e4 94 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
95 return wildmatch(pattern, string,
96 WM_PATHNAME |
55d34269 97 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0));
bd30c2e4
NTND
98 else
99 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f 100 return wildmatch(pattern, string,
55d34269 101 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0);
5d74762d
NTND
102}
103
0b6e56df
JH
104static int fnmatch_icase_mem(const char *pattern, int patternlen,
105 const char *string, int stringlen,
106 int flags)
107{
108 int match_status;
109 struct strbuf pat_buf = STRBUF_INIT;
110 struct strbuf str_buf = STRBUF_INIT;
111 const char *use_pat = pattern;
112 const char *use_str = string;
113
114 if (pattern[patternlen]) {
115 strbuf_add(&pat_buf, pattern, patternlen);
116 use_pat = pat_buf.buf;
117 }
118 if (string[stringlen]) {
119 strbuf_add(&str_buf, string, stringlen);
120 use_str = str_buf.buf;
121 }
122
f30366b2
JH
123 if (ignore_case)
124 flags |= WM_CASEFOLD;
55d34269 125 match_status = wildmatch(use_pat, use_str, flags);
0b6e56df
JH
126
127 strbuf_release(&pat_buf);
128 strbuf_release(&str_buf);
129
130 return match_status;
131}
132
827f4d6c 133static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 134{
827f4d6c 135 int n;
4a085b16 136 size_t max = 0;
3c6a370b 137
93d93537
NTND
138 /*
139 * ":(icase)path" is treated as a pathspec full of
140 * wildcard. In other words, only prefix is considered common
141 * prefix. If the pathspec is abc/foo abc/bar, running in
142 * subdir xyz, the common prefix is still xyz, not xuz/abc as
143 * in non-:(icase).
144 */
5c6933d2
NTND
145 GUARD_PATHSPEC(pathspec,
146 PATHSPEC_FROMTOP |
147 PATHSPEC_MAXDEPTH |
bd30c2e4 148 PATHSPEC_LITERAL |
93d93537 149 PATHSPEC_GLOB |
ef79b1f8 150 PATHSPEC_ICASE |
b0db7046
BW
151 PATHSPEC_EXCLUDE |
152 PATHSPEC_ATTR);
4a085b16 153
827f4d6c 154 for (n = 0; n < pathspec->nr; n++) {
93d93537 155 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
156 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
157 continue;
93d93537
NTND
158 if (pathspec->items[n].magic & PATHSPEC_ICASE)
159 item_len = pathspec->items[n].prefix;
160 else
161 item_len = pathspec->items[n].nowildcard_len;
162 while (i < item_len && (n == 0 || i < max)) {
827f4d6c
NTND
163 char c = pathspec->items[n].match[i];
164 if (c != pathspec->items[0].match[i])
4a085b16
JH
165 break;
166 if (c == '/')
167 len = i + 1;
827f4d6c 168 i++;
4a085b16 169 }
827f4d6c 170 if (n == 0 || len < max) {
4a085b16
JH
171 max = len;
172 if (!max)
173 break;
174 }
3c6a370b 175 }
4a085b16 176 return max;
3c6a370b
LT
177}
178
f950eb95
CB
179/*
180 * Returns a copy of the longest leading path common among all
181 * pathspecs.
182 */
827f4d6c 183char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
184{
185 unsigned long len = common_prefix_len(pathspec);
186
827f4d6c 187 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
188}
189
0d32c183
BW
190int fill_directory(struct dir_struct *dir,
191 struct index_state *istate,
192 const struct pathspec *pathspec)
1d8842d9 193{
bec5ab89 194 const char *prefix;
966de302 195 size_t prefix_len;
1d8842d9
LT
196
197 /*
198 * Calculate common prefix for the pathspec, and
199 * use that to optimize the directory walk
200 */
bec5ab89
RS
201 prefix_len = common_prefix_len(pathspec);
202 prefix = prefix_len ? pathspec->items[0].match : "";
1d8842d9
LT
203
204 /* Read the directory and prune it */
0d32c183 205 read_directory(dir, istate, prefix, prefix_len, pathspec);
966de302 206
966de302 207 return prefix_len;
1d8842d9
LT
208}
209
bc96cc87
NTND
210int within_depth(const char *name, int namelen,
211 int depth, int max_depth)
212{
213 const char *cp = name, *cpe = name + namelen;
214
215 while (cp < cpe) {
216 if (*cp++ != '/')
217 continue;
218 depth++;
219 if (depth > max_depth)
220 return 0;
221 }
222 return 1;
223}
224
578d81d0
JH
225/*
226 * Read the contents of the blob with the given OID into a buffer.
227 * Append a trailing LF to the end if the last line doesn't have one.
228 *
229 * Returns:
230 * -1 when the OID is invalid or unknown or does not refer to a blob.
231 * 0 when the blob is empty.
232 * 1 along with { data, size } of the (possibly augmented) buffer
233 * when successful.
234 *
4b33e602 235 * Optionally updates the given oid_stat with the given OID (when valid).
578d81d0 236 */
4b33e602
PO
237static int do_read_blob(const struct object_id *oid, struct oid_stat *oid_stat,
238 size_t *size_out, char **data_out)
578d81d0
JH
239{
240 enum object_type type;
241 unsigned long sz;
242 char *data;
243
244 *size_out = 0;
245 *data_out = NULL;
246
b4f5aca4 247 data = read_object_file(oid, &type, &sz);
578d81d0
JH
248 if (!data || type != OBJ_BLOB) {
249 free(data);
250 return -1;
251 }
252
4b33e602
PO
253 if (oid_stat) {
254 memset(&oid_stat->stat, 0, sizeof(oid_stat->stat));
255 oidcpy(&oid_stat->oid, oid);
578d81d0
JH
256 }
257
258 if (sz == 0) {
259 free(data);
260 return 0;
261 }
262
263 if (data[sz - 1] != '\n') {
264 data = xrealloc(data, st_add(sz, 1));
265 data[sz++] = '\n';
266 }
267
268 *size_out = xsize_t(sz);
269 *data_out = data;
270
271 return 1;
272}
273
75a6315f
BW
274#define DO_MATCH_EXCLUDE (1<<0)
275#define DO_MATCH_DIRECTORY (1<<1)
276#define DO_MATCH_SUBMODULE (1<<2)
42b0874a 277
61cf2820
NTND
278/*
279 * Does 'match' match the given name?
280 * A match is found if
281 *
282 * (1) the 'match' string is leading directory of 'name', or
283 * (2) the 'match' string is a wildcard and matches 'name', or
284 * (3) the 'match' string is exactly the same as 'name'.
285 *
286 * and the return value tells which case it was.
287 *
288 * It returns 0 when there is no match.
289 */
6d2df284
NTND
290static int match_pathspec_item(const struct index_state *istate,
291 const struct pathspec_item *item, int prefix,
42b0874a 292 const char *name, int namelen, unsigned flags)
61cf2820
NTND
293{
294 /* name/namelen has prefix cut off by caller */
295 const char *match = item->match + prefix;
296 int matchlen = item->len - prefix;
297
93d93537
NTND
298 /*
299 * The normal call pattern is:
300 * 1. prefix = common_prefix_len(ps);
301 * 2. prune something, or fill_directory
854b0959 302 * 3. match_pathspec()
93d93537
NTND
303 *
304 * 'prefix' at #1 may be shorter than the command's prefix and
305 * it's ok for #2 to match extra files. Those extras will be
306 * trimmed at #3.
307 *
308 * Suppose the pathspec is 'foo' and '../bar' running from
309 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
310 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
311 * user does not want XYZ/foo, only the "foo" part should be
312 * case-insensitive. We need to filter out XYZ/foo here. In
313 * other words, we do not trust the caller on comparing the
314 * prefix part when :(icase) is involved. We do exact
315 * comparison ourselves.
316 *
317 * Normally the caller (common_prefix_len() in fact) does
318 * _exact_ matching on name[-prefix+1..-1] and we do not need
319 * to check that part. Be defensive and check it anyway, in
320 * case common_prefix_len is changed, or a new caller is
321 * introduced that does not use common_prefix_len.
322 *
323 * If the penalty turns out too high when prefix is really
324 * long, maybe change it to
325 * strncmp(match, name, item->prefix - prefix)
326 */
327 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
328 strncmp(item->match, name - prefix, item->prefix))
329 return 0;
330
22af33be
NTND
331 if (item->attr_match_nr &&
332 !match_pathspec_attrs(istate, name, namelen, item))
b0db7046
BW
333 return 0;
334
61cf2820
NTND
335 /* If the match was just the prefix, we matched */
336 if (!*match)
337 return MATCHED_RECURSIVELY;
338
93d93537 339 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
340 if (matchlen == namelen)
341 return MATCHED_EXACTLY;
342
343 if (match[matchlen-1] == '/' || name[matchlen] == '/')
344 return MATCHED_RECURSIVELY;
68690fdd
NTND
345 } else if ((flags & DO_MATCH_DIRECTORY) &&
346 match[matchlen - 1] == '/' &&
347 namelen == matchlen - 1 &&
348 !ps_strncmp(item, match, name, namelen))
349 return MATCHED_EXACTLY;
61cf2820 350
5d74762d 351 if (item->nowildcard_len < item->len &&
bd30c2e4 352 !git_fnmatch(item, match, name,
8c6abbcd 353 item->nowildcard_len - prefix))
61cf2820
NTND
354 return MATCHED_FNMATCH;
355
75a6315f
BW
356 /* Perform checks to see if "name" is a super set of the pathspec */
357 if (flags & DO_MATCH_SUBMODULE) {
358 /* name is a literal prefix of the pathspec */
359 if ((namelen < matchlen) &&
360 (match[namelen] == '/') &&
361 !ps_strncmp(item, match, name, namelen))
362 return MATCHED_RECURSIVELY;
363
364 /* name" doesn't match up to the first wild character */
365 if (item->nowildcard_len < item->len &&
366 ps_strncmp(item, match, name,
367 item->nowildcard_len - prefix))
368 return 0;
369
370 /*
371 * Here is where we would perform a wildmatch to check if
372 * "name" can be matched as a directory (or a prefix) against
373 * the pathspec. Since wildmatch doesn't have this capability
374 * at the present we have to punt and say that it is a match,
375 * potentially returning a false positive
376 * The submodules themselves will be able to perform more
377 * accurate matching to determine if the pathspec matches.
378 */
379 return MATCHED_RECURSIVELY;
380 }
381
61cf2820
NTND
382 return 0;
383}
384
385/*
52ed1894
AS
386 * Given a name and a list of pathspecs, returns the nature of the
387 * closest (i.e. most specific) match of the name to any of the
388 * pathspecs.
389 *
390 * The caller typically calls this multiple times with the same
391 * pathspec and seen[] array but with different name/namelen
392 * (e.g. entries from the index) and is interested in seeing if and
393 * how each pathspec matches all the names it calls this function
394 * with. A mark is left in the seen[] array for each pathspec element
395 * indicating the closest type of match that element achieved, so if
396 * seen[n] remains zero after multiple invocations, that means the nth
397 * pathspec did not match any names, which could indicate that the
398 * user mistyped the nth pathspec.
61cf2820 399 */
6d2df284
NTND
400static int do_match_pathspec(const struct index_state *istate,
401 const struct pathspec *ps,
854b0959
NTND
402 const char *name, int namelen,
403 int prefix, char *seen,
42b0874a 404 unsigned flags)
61cf2820 405{
42b0874a 406 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 407
5c6933d2
NTND
408 GUARD_PATHSPEC(ps,
409 PATHSPEC_FROMTOP |
410 PATHSPEC_MAXDEPTH |
bd30c2e4 411 PATHSPEC_LITERAL |
93d93537 412 PATHSPEC_GLOB |
ef79b1f8 413 PATHSPEC_ICASE |
b0db7046
BW
414 PATHSPEC_EXCLUDE |
415 PATHSPEC_ATTR);
8f4f8f45 416
61cf2820 417 if (!ps->nr) {
6330a171
NTND
418 if (!ps->recursive ||
419 !(ps->magic & PATHSPEC_MAXDEPTH) ||
420 ps->max_depth == -1)
61cf2820
NTND
421 return MATCHED_RECURSIVELY;
422
423 if (within_depth(name, namelen, 0, ps->max_depth))
424 return MATCHED_EXACTLY;
425 else
426 return 0;
427 }
428
429 name += prefix;
430 namelen -= prefix;
431
432 for (i = ps->nr - 1; i >= 0; i--) {
433 int how;
ef79b1f8
NTND
434
435 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
436 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
437 continue;
438
61cf2820
NTND
439 if (seen && seen[i] == MATCHED_EXACTLY)
440 continue;
ef79b1f8
NTND
441 /*
442 * Make exclude patterns optional and never report
443 * "pathspec ':(exclude)foo' matches no files"
444 */
445 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
446 seen[i] = MATCHED_FNMATCH;
6d2df284 447 how = match_pathspec_item(istate, ps->items+i, prefix, name,
42b0874a 448 namelen, flags);
6330a171
NTND
449 if (ps->recursive &&
450 (ps->magic & PATHSPEC_MAXDEPTH) &&
451 ps->max_depth != -1 &&
61cf2820
NTND
452 how && how != MATCHED_FNMATCH) {
453 int len = ps->items[i].len;
454 if (name[len] == '/')
455 len++;
456 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
457 how = MATCHED_EXACTLY;
458 else
459 how = 0;
460 }
461 if (how) {
462 if (retval < how)
463 retval = how;
464 if (seen && seen[i] < how)
465 seen[i] = how;
466 }
467 }
468 return retval;
469}
470
6d2df284
NTND
471int match_pathspec(const struct index_state *istate,
472 const struct pathspec *ps,
854b0959 473 const char *name, int namelen,
ae8d0824 474 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
475{
476 int positive, negative;
ae8d0824 477 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
6d2df284 478 positive = do_match_pathspec(istate, ps, name, namelen,
42b0874a 479 prefix, seen, flags);
ef79b1f8
NTND
480 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
481 return positive;
6d2df284 482 negative = do_match_pathspec(istate, ps, name, namelen,
42b0874a
NTND
483 prefix, seen,
484 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
485 return negative ? 0 : positive;
486}
487
75a6315f
BW
488/**
489 * Check if a submodule is a superset of the pathspec
490 */
6d2df284
NTND
491int submodule_path_match(const struct index_state *istate,
492 const struct pathspec *ps,
75a6315f
BW
493 const char *submodule_name,
494 char *seen)
495{
6d2df284 496 int matched = do_match_pathspec(istate, ps, submodule_name,
75a6315f
BW
497 strlen(submodule_name),
498 0, seen,
499 DO_MATCH_DIRECTORY |
500 DO_MATCH_SUBMODULE);
501 return matched;
502}
503
777c55a6 504int report_path_error(const char *ps_matched,
c5c33504 505 const struct pathspec *pathspec)
777c55a6
JH
506{
507 /*
508 * Make sure all pathspec matched; otherwise it is an error.
509 */
777c55a6
JH
510 int num, errors = 0;
511 for (num = 0; num < pathspec->nr; num++) {
512 int other, found_dup;
513
514 if (ps_matched[num])
515 continue;
516 /*
517 * The caller might have fed identical pathspec
518 * twice. Do not barf on such a mistake.
519 * FIXME: parse_pathspec should have eliminated
520 * duplicate pathspec.
521 */
522 for (found_dup = other = 0;
523 !found_dup && other < pathspec->nr;
524 other++) {
525 if (other == num || !ps_matched[other])
526 continue;
527 if (!strcmp(pathspec->items[other].original,
528 pathspec->items[num].original))
529 /*
530 * Ok, we have a match already.
531 */
532 found_dup = 1;
533 }
534 if (found_dup)
535 continue;
536
a80897c1 537 error(_("pathspec '%s' did not match any file(s) known to git"),
777c55a6
JH
538 pathspec->items[num].original);
539 errors++;
540 }
777c55a6
JH
541 return errors;
542}
543
fcd631ed
NTND
544/*
545 * Return the length of the "simple" part of a path match limiter.
546 */
87323bda 547int simple_length(const char *match)
fcd631ed
NTND
548{
549 int len = -1;
550
551 for (;;) {
552 unsigned char c = *match++;
553 len++;
554 if (c == '\0' || is_glob_special(c))
555 return len;
556 }
557}
558
87323bda 559int no_wildcard(const char *string)
68492fc7 560{
fcd631ed 561 return string[simple_length(string)] == '\0';
68492fc7
LK
562}
563
82dce998
NTND
564void parse_exclude_pattern(const char **pattern,
565 int *patternlen,
f8708998 566 unsigned *flags,
82dce998 567 int *nowildcardlen)
84460eec
NTND
568{
569 const char *p = *pattern;
570 size_t i, len;
571
572 *flags = 0;
573 if (*p == '!') {
574 *flags |= EXC_FLAG_NEGATIVE;
575 p++;
576 }
577 len = strlen(p);
578 if (len && p[len - 1] == '/') {
579 len--;
580 *flags |= EXC_FLAG_MUSTBEDIR;
581 }
582 for (i = 0; i < len; i++) {
583 if (p[i] == '/')
584 break;
585 }
586 if (i == len)
587 *flags |= EXC_FLAG_NODIR;
588 *nowildcardlen = simple_length(p);
589 /*
590 * we should have excluded the trailing slash from 'p' too,
591 * but that's one more allocation. Instead just make sure
592 * nowildcardlen does not exceed real patternlen
593 */
594 if (*nowildcardlen > len)
595 *nowildcardlen = len;
596 if (*p == '*' && no_wildcard(p + 1))
597 *flags |= EXC_FLAG_ENDSWITH;
598 *pattern = p;
599 *patternlen = len;
600}
601
453ec4bd 602void add_exclude(const char *string, const char *base,
c04318e4 603 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 604{
ab8db613 605 struct path_pattern *pattern;
84460eec 606 int patternlen;
f8708998 607 unsigned flags;
84460eec 608 int nowildcardlen;
453ec4bd 609
84460eec
NTND
610 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
611 if (flags & EXC_FLAG_MUSTBEDIR) {
ab8db613 612 FLEXPTR_ALLOC_MEM(pattern, pattern, string, patternlen);
d6b8fc30 613 } else {
ab8db613
DS
614 pattern = xmalloc(sizeof(*pattern));
615 pattern->pattern = string;
d6b8fc30 616 }
ab8db613
DS
617 pattern->patternlen = patternlen;
618 pattern->nowildcardlen = nowildcardlen;
619 pattern->base = base;
620 pattern->baselen = baselen;
621 pattern->flags = flags;
622 pattern->srcpos = srcpos;
623 ALLOC_GROW(el->patterns, el->nr + 1, el->alloc);
624 el->patterns[el->nr++] = pattern;
625 pattern->el = el;
453ec4bd
LT
626}
627
578d81d0
JH
628static int read_skip_worktree_file_from_index(const struct index_state *istate,
629 const char *path,
4b33e602
PO
630 size_t *size_out, char **data_out,
631 struct oid_stat *oid_stat)
c28b3d6e
NTND
632{
633 int pos, len;
c28b3d6e
NTND
634
635 len = strlen(path);
6f52b741 636 pos = index_name_pos(istate, path, len);
c28b3d6e 637 if (pos < 0)
578d81d0 638 return -1;
6f52b741 639 if (!ce_skip_worktree(istate->cache[pos]))
578d81d0
JH
640 return -1;
641
4b33e602 642 return do_read_blob(&istate->cache[pos]->oid, oid_stat, size_out, data_out);
c28b3d6e
NTND
643}
644
f6198812
AS
645/*
646 * Frees memory within el which was allocated for exclude patterns and
647 * the file buffer. Does not free el itself.
648 */
649void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
650{
651 int i;
652
5cee3493 653 for (i = 0; i < el->nr; i++)
ab8db613
DS
654 free(el->patterns[i]);
655 free(el->patterns);
c082df24 656 free(el->filebuf);
0fd0e241 657
2653a8c6 658 memset(el, 0, sizeof(*el));
0fd0e241
NTND
659}
660
7e2e4b37 661static void trim_trailing_spaces(char *buf)
16402b99 662{
e61a6c1d
PB
663 char *p, *last_space = NULL;
664
665 for (p = buf; *p; p++)
666 switch (*p) {
667 case ' ':
668 if (!last_space)
669 last_space = p;
670 break;
671 case '\\':
672 p++;
673 if (!*p)
674 return;
675 /* fallthrough */
676 default:
677 last_space = NULL;
678 }
679
680 if (last_space)
681 *last_space = '\0';
16402b99
NTND
682}
683
0dcb8d7f
NTND
684/*
685 * Given a subdirectory name and "dir" of the current directory,
686 * search the subdir in "dir" and return it, or create a new one if it
687 * does not exist in "dir".
688 *
689 * If "name" has the trailing slash, it'll be excluded in the search.
690 */
691static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
692 struct untracked_cache_dir *dir,
693 const char *name, int len)
694{
695 int first, last;
696 struct untracked_cache_dir *d;
697 if (!dir)
698 return NULL;
699 if (len && name[len - 1] == '/')
700 len--;
701 first = 0;
702 last = dir->dirs_nr;
703 while (last > first) {
704 int cmp, next = (last + first) >> 1;
705 d = dir->dirs[next];
706 cmp = strncmp(name, d->name, len);
707 if (!cmp && strlen(d->name) > len)
708 cmp = -1;
709 if (!cmp)
710 return d;
711 if (cmp < 0) {
712 last = next;
713 continue;
714 }
715 first = next+1;
716 }
717
718 uc->dir_created++;
96ffc06f 719 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
720
721 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
f919ffeb
SG
722 MOVE_ARRAY(dir->dirs + first + 1, dir->dirs + first,
723 dir->dirs_nr - first);
0dcb8d7f
NTND
724 dir->dirs_nr++;
725 dir->dirs[first] = d;
726 return d;
727}
728
ccad261f
NTND
729static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
730{
731 int i;
732 dir->valid = 0;
733 dir->untracked_nr = 0;
734 for (i = 0; i < dir->dirs_nr; i++)
735 do_invalidate_gitignore(dir->dirs[i]);
736}
737
738static void invalidate_gitignore(struct untracked_cache *uc,
739 struct untracked_cache_dir *dir)
740{
741 uc->gitignore_invalidated++;
742 do_invalidate_gitignore(dir);
743}
744
91a2288b
NTND
745static void invalidate_directory(struct untracked_cache *uc,
746 struct untracked_cache_dir *dir)
747{
26cb0182 748 int i;
b6403131
NTND
749
750 /*
751 * Invalidation increment here is just roughly correct. If
752 * untracked_nr or any of dirs[].recurse is non-zero, we
753 * should increment dir_invalidated too. But that's more
754 * expensive to do.
755 */
756 if (dir->valid)
757 uc->dir_invalidated++;
758
91a2288b
NTND
759 dir->valid = 0;
760 dir->untracked_nr = 0;
26cb0182
NTND
761 for (i = 0; i < dir->dirs_nr; i++)
762 dir->dirs[i]->recurse = 0;
91a2288b
NTND
763}
764
578d81d0
JH
765static int add_excludes_from_buffer(char *buf, size_t size,
766 const char *base, int baselen,
767 struct exclude_list *el);
768
55fe6f51
NTND
769/*
770 * Given a file with name "fname", read it (either from disk, or from
473e3930 771 * an index if 'istate' is non-null), parse it and store the
55fe6f51
NTND
772 * exclude rules in "el".
773 *
774 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
775 * stat data from disk (only valid if add_excludes returns zero). If
776 * ss_valid is non-zero, "ss" must contain good value as input.
777 */
778static int add_excludes(const char *fname, const char *base, int baselen,
4b33e602
PO
779 struct exclude_list *el, struct index_state *istate,
780 struct oid_stat *oid_stat)
453ec4bd 781{
c470701a 782 struct stat st;
578d81d0
JH
783 int r;
784 int fd;
9d14017a 785 size_t size = 0;
578d81d0 786 char *buf;
453ec4bd
LT
787
788 fd = open(fname, O_RDONLY);
c28b3d6e 789 if (fd < 0 || fstat(fd, &st) < 0) {
11dc1fcb
NTND
790 if (fd < 0)
791 warn_on_fopen_errors(fname);
792 else
c28b3d6e 793 close(fd);
578d81d0 794 if (!istate)
c28b3d6e 795 return -1;
578d81d0
JH
796 r = read_skip_worktree_file_from_index(istate, fname,
797 &size, &buf,
4b33e602 798 oid_stat);
578d81d0
JH
799 if (r != 1)
800 return r;
d961baa8 801 } else {
c28b3d6e
NTND
802 size = xsize_t(st.st_size);
803 if (size == 0) {
4b33e602
PO
804 if (oid_stat) {
805 fill_stat_data(&oid_stat->stat, &st);
ba2df751 806 oidcpy(&oid_stat->oid, the_hash_algo->empty_blob);
4b33e602 807 oid_stat->valid = 1;
55fe6f51 808 }
c28b3d6e
NTND
809 close(fd);
810 return 0;
811 }
3733e694 812 buf = xmallocz(size);
c28b3d6e 813 if (read_in_full(fd, buf, size) != size) {
45d76f17 814 free(buf);
c28b3d6e
NTND
815 close(fd);
816 return -1;
817 }
45d76f17 818 buf[size++] = '\n';
c28b3d6e 819 close(fd);
4b33e602 820 if (oid_stat) {
55fe6f51 821 int pos;
4b33e602
PO
822 if (oid_stat->valid &&
823 !match_stat_data_racy(istate, &oid_stat->stat, &st))
55fe6f51 824 ; /* no content change, ss->sha1 still good */
473e3930
BW
825 else if (istate &&
826 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 &&
827 !ce_stage(istate->cache[pos]) &&
828 ce_uptodate(istate->cache[pos]) &&
82b474e0 829 !would_convert_to_git(istate, fname))
4b33e602
PO
830 oidcpy(&oid_stat->oid,
831 &istate->cache[pos]->oid);
55fe6f51 832 else
f070facc
PO
833 hash_object_file(buf, size, "blob",
834 &oid_stat->oid);
4b33e602
PO
835 fill_stat_data(&oid_stat->stat, &st);
836 oid_stat->valid = 1;
55fe6f51 837 }
6ba78238 838 }
453ec4bd 839
578d81d0
JH
840 add_excludes_from_buffer(buf, size, base, baselen, el);
841 return 0;
842}
843
844static int add_excludes_from_buffer(char *buf, size_t size,
845 const char *base, int baselen,
846 struct exclude_list *el)
847{
848 int i, lineno = 1;
849 char *entry;
850
c082df24 851 el->filebuf = buf;
245e1c19 852
dde843e7
JH
853 if (skip_utf8_bom(&buf, size))
854 size -= buf - el->filebuf;
855
453ec4bd 856 entry = buf;
245e1c19 857
45d76f17
NTND
858 for (i = 0; i < size; i++) {
859 if (buf[i] == '\n') {
453ec4bd
LT
860 if (entry != buf + i && entry[0] != '#') {
861 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 862 trim_trailing_spaces(entry);
c04318e4 863 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 864 }
c04318e4 865 lineno++;
453ec4bd
LT
866 entry = buf + i + 1;
867 }
868 }
869 return 0;
453ec4bd
LT
870}
871
55fe6f51
NTND
872int add_excludes_from_file_to_list(const char *fname, const char *base,
873 int baselen, struct exclude_list *el,
473e3930 874 struct index_state *istate)
55fe6f51 875{
473e3930 876 return add_excludes(fname, base, baselen, el, istate, NULL);
55fe6f51
NTND
877}
878
578d81d0
JH
879int add_excludes_from_blob_to_list(
880 struct object_id *oid,
881 const char *base, int baselen,
882 struct exclude_list *el)
883{
884 char *buf;
885 size_t size;
886 int r;
887
888 r = do_read_blob(oid, NULL, &size, &buf);
889 if (r != 1)
890 return r;
891
892 add_excludes_from_buffer(buf, size, base, baselen, el);
893 return 0;
894}
895
c04318e4
AS
896struct exclude_list *add_exclude_list(struct dir_struct *dir,
897 int group_type, const char *src)
c082df24
AS
898{
899 struct exclude_list *el;
900 struct exclude_list_group *group;
901
902 group = &dir->exclude_list_group[group_type];
903 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
904 el = &group->el[group->nr++];
905 memset(el, 0, sizeof(*el));
c04318e4 906 el->src = src;
c082df24
AS
907 return el;
908}
909
910/*
911 * Used to set up core.excludesfile and .git/info/exclude lists.
912 */
0dcb8d7f 913static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
4b33e602 914 struct oid_stat *oid_stat)
453ec4bd 915{
c082df24 916 struct exclude_list *el;
ccad261f
NTND
917 /*
918 * catch setup_standard_excludes() that's called before
919 * dir->untracked is assigned. That function behaves
920 * differently when dir->untracked is non-NULL.
921 */
922 if (!dir->untracked)
923 dir->unmanaged_exclude_files++;
c04318e4 924 el = add_exclude_list(dir, EXC_FILE, fname);
4b33e602 925 if (add_excludes(fname, "", 0, el, NULL, oid_stat) < 0)
a80897c1 926 die(_("cannot use %s as an exclude file"), fname);
453ec4bd
LT
927}
928
0dcb8d7f
NTND
929void add_excludes_from_file(struct dir_struct *dir, const char *fname)
930{
ccad261f 931 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
932 add_excludes_from_file_1(dir, fname, NULL);
933}
934
82dce998
NTND
935int match_basename(const char *basename, int basenamelen,
936 const char *pattern, int prefix, int patternlen,
f8708998 937 unsigned flags)
593cb880
NTND
938{
939 if (prefix == patternlen) {
0b6e56df 940 if (patternlen == basenamelen &&
ba0897e6 941 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
942 return 1;
943 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 944 /* "*literal" matching against "fooliteral" */
593cb880 945 if (patternlen - 1 <= basenamelen &&
ba0897e6 946 !fspathncmp(pattern + 1,
0b6e56df
JH
947 basename + basenamelen - (patternlen - 1),
948 patternlen - 1))
593cb880
NTND
949 return 1;
950 } else {
0b6e56df
JH
951 if (fnmatch_icase_mem(pattern, patternlen,
952 basename, basenamelen,
953 0) == 0)
593cb880
NTND
954 return 1;
955 }
956 return 0;
957}
958
82dce998
NTND
959int match_pathname(const char *pathname, int pathlen,
960 const char *base, int baselen,
961 const char *pattern, int prefix, int patternlen,
f8708998 962 unsigned flags)
b5592632
NTND
963{
964 const char *name;
965 int namelen;
966
967 /*
968 * match with FNM_PATHNAME; the pattern has base implicitly
969 * in front of it.
970 */
971 if (*pattern == '/') {
972 pattern++;
982ac873 973 patternlen--;
b5592632
NTND
974 prefix--;
975 }
976
977 /*
978 * baselen does not count the trailing slash. base[] may or
979 * may not end with a trailing slash though.
980 */
981 if (pathlen < baselen + 1 ||
982 (baselen && pathname[baselen] != '/') ||
ba0897e6 983 fspathncmp(pathname, base, baselen))
b5592632
NTND
984 return 0;
985
986 namelen = baselen ? pathlen - baselen - 1 : pathlen;
987 name = pathname + pathlen - namelen;
988
989 if (prefix) {
990 /*
991 * if the non-wildcard part is longer than the
992 * remaining pathname, surely it cannot match.
993 */
994 if (prefix > namelen)
995 return 0;
996
ba0897e6 997 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
998 return 0;
999 pattern += prefix;
ab3aebc1 1000 patternlen -= prefix;
b5592632
NTND
1001 name += prefix;
1002 namelen -= prefix;
ab3aebc1
JK
1003
1004 /*
1005 * If the whole pattern did not have a wildcard,
1006 * then our prefix match is all we need; we
1007 * do not need to call fnmatch at all.
1008 */
5cee3493 1009 if (!patternlen && !namelen)
ab3aebc1 1010 return 1;
b5592632
NTND
1011 }
1012
ab3aebc1
JK
1013 return fnmatch_icase_mem(pattern, patternlen,
1014 name, namelen,
f30366b2 1015 WM_PATHNAME) == 0;
b5592632
NTND
1016}
1017
578cd7c3
AS
1018/*
1019 * Scan the given exclude list in reverse to see whether pathname
1020 * should be ignored. The first match (i.e. the last on the list), if
1021 * any, determines the fate. Returns the exclude_list element which
1022 * matched, or NULL for undecided.
453ec4bd 1023 */
ab8db613 1024static struct path_pattern *last_exclude_matching_from_list(const char *pathname,
578cd7c3
AS
1025 int pathlen,
1026 const char *basename,
1027 int *dtype,
2b70e88d
BW
1028 struct exclude_list *el,
1029 struct index_state *istate)
453ec4bd 1030{
ab8db613 1031 struct path_pattern *res = NULL; /* undecided */
5cee3493 1032 int i;
453ec4bd 1033
35a94d44 1034 if (!el->nr)
578cd7c3 1035 return NULL; /* undefined */
d6b8fc30 1036
35a94d44 1037 for (i = el->nr - 1; 0 <= i; i--) {
ab8db613
DS
1038 struct path_pattern *pattern = el->patterns[i];
1039 const char *exclude = pattern->pattern;
1040 int prefix = pattern->nowildcardlen;
35a94d44 1041
ab8db613 1042 if (pattern->flags & EXC_FLAG_MUSTBEDIR) {
35a94d44 1043 if (*dtype == DT_UNKNOWN)
2b70e88d 1044 *dtype = get_dtype(NULL, istate, pathname, pathlen);
35a94d44
NTND
1045 if (*dtype != DT_DIR)
1046 continue;
1047 }
d6b8fc30 1048
ab8db613 1049 if (pattern->flags & EXC_FLAG_NODIR) {
593cb880
NTND
1050 if (match_basename(basename,
1051 pathlen - (basename - pathname),
ab8db613
DS
1052 exclude, prefix, pattern->patternlen,
1053 pattern->flags)) {
1054 res = pattern;
e6efecc4
NTND
1055 break;
1056 }
35a94d44
NTND
1057 continue;
1058 }
1059
ab8db613
DS
1060 assert(pattern->baselen == 0 ||
1061 pattern->base[pattern->baselen - 1] == '/');
b5592632 1062 if (match_pathname(pathname, pathlen,
ab8db613
DS
1063 pattern->base,
1064 pattern->baselen ? pattern->baselen - 1 : 0,
1065 exclude, prefix, pattern->patternlen,
1066 pattern->flags)) {
1067 res = pattern;
e6efecc4
NTND
1068 break;
1069 }
453ec4bd 1070 }
ab8db613 1071 return res;
578cd7c3
AS
1072}
1073
1074/*
1075 * Scan the list and let the last match determine the fate.
1076 * Return 1 for exclude, 0 for include and -1 for undecided.
1077 */
1078int is_excluded_from_list(const char *pathname,
1079 int pathlen, const char *basename, int *dtype,
fba92be8 1080 struct exclude_list *el, struct index_state *istate)
578cd7c3 1081{
ab8db613
DS
1082 struct path_pattern *pattern;
1083 pattern = last_exclude_matching_from_list(pathname, pathlen, basename,
fba92be8 1084 dtype, el, istate);
ab8db613
DS
1085 if (pattern)
1086 return pattern->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1087 return -1; /* undecided */
1088}
1089
ab8db613
DS
1090static struct path_pattern *last_exclude_matching_from_lists(
1091 struct dir_struct *dir, struct index_state *istate,
1092 const char *pathname, int pathlen,
1093 const char *basename, int *dtype_p)
46aa2f95
KB
1094{
1095 int i, j;
1096 struct exclude_list_group *group;
ab8db613 1097 struct path_pattern *pattern;
46aa2f95
KB
1098 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
1099 group = &dir->exclude_list_group[i];
1100 for (j = group->nr - 1; j >= 0; j--) {
ab8db613 1101 pattern = last_exclude_matching_from_list(
46aa2f95 1102 pathname, pathlen, basename, dtype_p,
2b70e88d 1103 &group->el[j], istate);
ab8db613
DS
1104 if (pattern)
1105 return pattern;
46aa2f95
KB
1106 }
1107 }
1108 return NULL;
1109}
1110
6cd5c582
KB
1111/*
1112 * Loads the per-directory exclude list for the substring of base
1113 * which has a char length of baselen.
1114 */
e799ed40
BW
1115static void prep_exclude(struct dir_struct *dir,
1116 struct index_state *istate,
1117 const char *base, int baselen)
6cd5c582
KB
1118{
1119 struct exclude_list_group *group;
1120 struct exclude_list *el;
1121 struct exclude_stack *stk = NULL;
0dcb8d7f 1122 struct untracked_cache_dir *untracked;
6cd5c582
KB
1123 int current;
1124
6cd5c582
KB
1125 group = &dir->exclude_list_group[EXC_DIRS];
1126
d961baa8
NTND
1127 /*
1128 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 1129 * which originate from directories not in the prefix of the
d961baa8
NTND
1130 * path being checked.
1131 */
6cd5c582
KB
1132 while ((stk = dir->exclude_stack) != NULL) {
1133 if (stk->baselen <= baselen &&
aceb9429 1134 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
1135 break;
1136 el = &group->el[dir->exclude_stack->exclude_ix];
1137 dir->exclude_stack = stk->prev;
ab8db613 1138 dir->pattern = NULL;
aceb9429 1139 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
1140 clear_exclude_list(el);
1141 free(stk);
1142 group->nr--;
1143 }
1144
95c6f271 1145 /* Skip traversing into sub directories if the parent is excluded */
ab8db613 1146 if (dir->pattern)
95c6f271
KB
1147 return;
1148
aceb9429
NTND
1149 /*
1150 * Lazy initialization. All call sites currently just
1151 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1152 * them seems lots of work for little benefit.
1153 */
1154 if (!dir->basebuf.buf)
1155 strbuf_init(&dir->basebuf, PATH_MAX);
1156
6cd5c582
KB
1157 /* Read from the parent directories and push them down. */
1158 current = stk ? stk->baselen : -1;
aceb9429 1159 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1160 if (dir->untracked)
1161 untracked = stk ? stk->ucd : dir->untracked->root;
1162 else
1163 untracked = NULL;
1164
6cd5c582 1165 while (current < baselen) {
6cd5c582 1166 const char *cp;
4b33e602 1167 struct oid_stat oid_stat;
6cd5c582 1168
03e11a71 1169 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1170 if (current < 0) {
1171 cp = base;
1172 current = 0;
d961baa8 1173 } else {
6cd5c582
KB
1174 cp = strchr(base + current + 1, '/');
1175 if (!cp)
1176 die("oops in prep_exclude");
1177 cp++;
0dcb8d7f
NTND
1178 untracked =
1179 lookup_untracked(dir->untracked, untracked,
1180 base + current,
1181 cp - base - current);
6cd5c582
KB
1182 }
1183 stk->prev = dir->exclude_stack;
1184 stk->baselen = cp - base;
95c6f271 1185 stk->exclude_ix = group->nr;
0dcb8d7f 1186 stk->ucd = untracked;
95c6f271 1187 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1188 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1189 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1190
1191 /* Abort if the directory is excluded */
1192 if (stk->baselen) {
1193 int dt = DT_DIR;
aceb9429 1194 dir->basebuf.buf[stk->baselen - 1] = 0;
ab8db613 1195 dir->pattern = last_exclude_matching_from_lists(dir,
e799ed40 1196 istate,
aceb9429
NTND
1197 dir->basebuf.buf, stk->baselen - 1,
1198 dir->basebuf.buf + current, &dt);
1199 dir->basebuf.buf[stk->baselen - 1] = '/';
ab8db613
DS
1200 if (dir->pattern &&
1201 dir->pattern->flags & EXC_FLAG_NEGATIVE)
1202 dir->pattern = NULL;
1203 if (dir->pattern) {
95c6f271
KB
1204 dir->exclude_stack = stk;
1205 return;
1206 }
1207 }
1208
aceb9429 1209 /* Try to read per-directory file */
4b33e602
PO
1210 oidclr(&oid_stat.oid);
1211 oid_stat.valid = 0;
27b099ae
NTND
1212 if (dir->exclude_per_dir &&
1213 /*
1214 * If we know that no files have been added in
1215 * this directory (i.e. valid_cached_dir() has
1216 * been executed and set untracked->valid) ..
1217 */
1218 (!untracked || !untracked->valid ||
1219 /*
1220 * .. and .gitignore does not exist before
70c369cd 1221 * (i.e. null exclude_oid). Then we can skip
7687252f
DT
1222 * loading .gitignore, which would result in
1223 * ENOENT anyway.
27b099ae 1224 */
70c369cd 1225 !is_null_oid(&untracked->exclude_oid))) {
95c6f271
KB
1226 /*
1227 * dir->basebuf gets reused by the traversal, but we
1228 * need fname to remain unchanged to ensure the src
ab8db613 1229 * member of each struct path_pattern correctly
95c6f271
KB
1230 * back-references its source file. Other invocations
1231 * of add_exclude_list provide stable strings, so we
aceb9429 1232 * strbuf_detach() and free() here in the caller.
95c6f271 1233 */
aceb9429
NTND
1234 struct strbuf sb = STRBUF_INIT;
1235 strbuf_addbuf(&sb, &dir->basebuf);
1236 strbuf_addstr(&sb, dir->exclude_per_dir);
1237 el->src = strbuf_detach(&sb, NULL);
e799ed40 1238 add_excludes(el->src, el->src, stk->baselen, el, istate,
4b33e602 1239 untracked ? &oid_stat : NULL);
0dcb8d7f 1240 }
5ebf79ad
NTND
1241 /*
1242 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1243 * will first be called in valid_cached_dir() then maybe many
1244 * times more in last_exclude_matching(). When the cache is
1245 * used, last_exclude_matching() will not be called and
1246 * reading .gitignore content will be a waste.
1247 *
1248 * So when it's called by valid_cached_dir() and we can get
1249 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1250 * modified on work tree), we could delay reading the
1251 * .gitignore content until we absolutely need it in
1252 * last_exclude_matching(). Be careful about ignore rule
1253 * order, though, if you do that.
1254 */
1255 if (untracked &&
9001dc2a 1256 !oideq(&oid_stat.oid, &untracked->exclude_oid)) {
5ebf79ad 1257 invalidate_gitignore(dir->untracked, untracked);
70c369cd 1258 oidcpy(&untracked->exclude_oid, &oid_stat.oid);
95c6f271 1259 }
6cd5c582
KB
1260 dir->exclude_stack = stk;
1261 current = stk->baselen;
1262 }
aceb9429 1263 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1264}
1265
f4cd69a6
AS
1266/*
1267 * Loads the exclude lists for the directory containing pathname, then
1268 * scans all exclude lists to determine whether pathname is excluded.
1269 * Returns the exclude_list element which matched, or NULL for
1270 * undecided.
1271 */
ab8db613 1272struct path_pattern *last_exclude_matching(struct dir_struct *dir,
a0bba65b
BW
1273 struct index_state *istate,
1274 const char *pathname,
1275 int *dtype_p)
453ec4bd
LT
1276{
1277 int pathlen = strlen(pathname);
68492fc7
LK
1278 const char *basename = strrchr(pathname, '/');
1279 basename = (basename) ? basename+1 : pathname;
453ec4bd 1280
a0bba65b 1281 prep_exclude(dir, istate, pathname, basename-pathname);
c082df24 1282
ab8db613
DS
1283 if (dir->pattern)
1284 return dir->pattern;
95c6f271 1285
a0bba65b 1286 return last_exclude_matching_from_lists(dir, istate, pathname, pathlen,
46aa2f95 1287 basename, dtype_p);
f4cd69a6
AS
1288}
1289
1290/*
1291 * Loads the exclude lists for the directory containing pathname, then
1292 * scans all exclude lists to determine whether pathname is excluded.
1293 * Returns 1 if true, otherwise 0.
1294 */
a0bba65b
BW
1295int is_excluded(struct dir_struct *dir, struct index_state *istate,
1296 const char *pathname, int *dtype_p)
f4cd69a6 1297{
ab8db613 1298 struct path_pattern *pattern =
a0bba65b 1299 last_exclude_matching(dir, istate, pathname, dtype_p);
ab8db613
DS
1300 if (pattern)
1301 return pattern->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1302 return 0;
1303}
1304
f3fa1838
JH
1305static struct dir_entry *dir_entry_new(const char *pathname, int len)
1306{
453ec4bd
LT
1307 struct dir_entry *ent;
1308
96ffc06f 1309 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1310 ent->len = len;
4d06f8ac 1311 return ent;
453ec4bd
LT
1312}
1313
9e58beca
BW
1314static struct dir_entry *dir_add_name(struct dir_struct *dir,
1315 struct index_state *istate,
1316 const char *pathname, int len)
6815e569 1317{
9e58beca 1318 if (index_file_exists(istate, pathname, len, ignore_case))
6815e569
JK
1319 return NULL;
1320
25fd2f7a 1321 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1322 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1323}
1324
9e58beca
BW
1325struct dir_entry *dir_add_ignored(struct dir_struct *dir,
1326 struct index_state *istate,
1327 const char *pathname, int len)
2abd31b0 1328{
9e58beca 1329 if (!index_name_is_other(istate, pathname, len))
2abd31b0
JK
1330 return NULL;
1331
25fd2f7a 1332 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1333 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1334}
1335
09595258
LT
1336enum exist_status {
1337 index_nonexistent = 0,
1338 index_directory,
4b05548f 1339 index_gitdir
09595258
LT
1340};
1341
5102c617 1342/*
71261027 1343 * Do not use the alphabetically sorted index to look up
5102c617 1344 * the directory name; instead, use the case insensitive
ebbd7439 1345 * directory hash.
5102c617 1346 */
ae520e36
BW
1347static enum exist_status directory_exists_in_index_icase(struct index_state *istate,
1348 const char *dirname, int len)
5102c617 1349{
41284eb0 1350 struct cache_entry *ce;
5102c617 1351
ae520e36 1352 if (index_dir_exists(istate, dirname, len))
5102c617
JJ
1353 return index_directory;
1354
ae520e36 1355 ce = index_file_exists(istate, dirname, len, ignore_case);
41284eb0 1356 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1357 return index_gitdir;
1358
5102c617
JJ
1359 return index_nonexistent;
1360}
1361
09595258
LT
1362/*
1363 * The index sorts alphabetically by entry name, which
1364 * means that a gitlink sorts as '\0' at the end, while
1365 * a directory (which is defined not as an entry, but as
1366 * the files it contains) will sort with the '/' at the
1367 * end.
1368 */
ae520e36
BW
1369static enum exist_status directory_exists_in_index(struct index_state *istate,
1370 const char *dirname, int len)
453ec4bd 1371{
5102c617
JJ
1372 int pos;
1373
1374 if (ignore_case)
ae520e36 1375 return directory_exists_in_index_icase(istate, dirname, len);
5102c617 1376
ae520e36 1377 pos = index_name_pos(istate, dirname, len);
09595258
LT
1378 if (pos < 0)
1379 pos = -pos-1;
ae520e36
BW
1380 while (pos < istate->cache_nr) {
1381 const struct cache_entry *ce = istate->cache[pos++];
09595258
LT
1382 unsigned char endchar;
1383
1384 if (strncmp(ce->name, dirname, len))
1385 break;
1386 endchar = ce->name[len];
1387 if (endchar > '/')
1388 break;
1389 if (endchar == '/')
1390 return index_directory;
7a51ed66 1391 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1392 return index_gitdir;
1393 }
1394 return index_nonexistent;
1395}
1396
1397/*
1398 * When we find a directory when traversing the filesystem, we
1399 * have three distinct cases:
1400 *
1401 * - ignore it
1402 * - see it as a directory
1403 * - recurse into it
1404 *
1405 * and which one we choose depends on a combination of existing
1406 * git index contents and the flags passed into the directory
1407 * traversal routine.
1408 *
1409 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1410 * directory name, we always recurse into the directory to see
1411 * all the files.
09595258
LT
1412 *
1413 * Case 2: If we *already* have that directory name as a gitlink,
1414 * we always continue to see it as a gitlink, regardless of whether
1415 * there is an actual git directory there or not (it might not
1416 * be checked out as a subproject!)
1417 *
1418 * Case 3: if we didn't have it in the index previously, we
1419 * have a few sub-cases:
1420 *
1421 * (a) if "show_other_directories" is true, we show it as
1422 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1423 * also true, in which case we need to check if it contains any
1424 * untracked and / or ignored files.
09595258 1425 * (b) if it looks like a git directory, and we don't have
302b9282 1426 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1427 * as a directory.
1428 * (c) otherwise, we recurse into it.
1429 */
defd7c7b 1430static enum path_treatment treat_directory(struct dir_struct *dir,
0ef8e169 1431 struct index_state *istate,
0dcb8d7f 1432 struct untracked_cache_dir *untracked,
2e5910f2 1433 const char *dirname, int len, int baselen, int exclude,
e1b8c7bd 1434 const struct pathspec *pathspec)
09595258
LT
1435{
1436 /* The "len-1" is to strip the final '/' */
0ef8e169 1437 switch (directory_exists_in_index(istate, dirname, len-1)) {
09595258 1438 case index_directory:
defd7c7b 1439 return path_recurse;
09595258
LT
1440
1441 case index_gitdir:
26c986e1 1442 return path_none;
09595258
LT
1443
1444 case index_nonexistent:
7c4c97c0 1445 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1446 break;
eec0f7f2
JM
1447 if (exclude &&
1448 (dir->flags & DIR_SHOW_IGNORED_TOO) &&
1449 (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {
1450
1451 /*
1452 * This is an excluded directory and we are
1453 * showing ignored paths that match an exclude
1454 * pattern. (e.g. show directory as ignored
1455 * only if it matches an exclude pattern).
1456 * This path will either be 'path_excluded`
1457 * (if we are showing empty directories or if
1458 * the directory is not empty), or will be
1459 * 'path_none' (empty directory, and we are
1460 * not showing empty directories).
1461 */
1462 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
1463 return path_excluded;
1464
1465 if (read_directory_recursive(dir, istate, dirname, len,
1466 untracked, 1, 1, pathspec) == path_excluded)
1467 return path_excluded;
1468
1469 return path_none;
1470 }
7c4c97c0 1471 if (!(dir->flags & DIR_NO_GITLINKS)) {
b2282704
KM
1472 struct strbuf sb = STRBUF_INIT;
1473 strbuf_addstr(&sb, dirname);
1474 if (is_nonbare_repository_dir(&sb))
fadb4820 1475 return exclude ? path_excluded : path_untracked;
b2282704 1476 strbuf_release(&sb);
09595258 1477 }
defd7c7b 1478 return path_recurse;
09595258
LT
1479 }
1480
1481 /* This is the "show_other_directories" case */
721ac4ed 1482
184d2a8e 1483 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1484 return exclude ? path_excluded : path_untracked;
1485
2e5910f2
DT
1486 untracked = lookup_untracked(dir->untracked, untracked,
1487 dirname + baselen, len - baselen);
5aaa7fd3
JM
1488
1489 /*
1490 * If this is an excluded directory, then we only need to check if
1491 * the directory contains any files.
1492 */
0ef8e169 1493 return read_directory_recursive(dir, istate, dirname, len,
5aaa7fd3 1494 untracked, 1, exclude, pathspec);
453ec4bd
LT
1495}
1496
9fc42d60
LT
1497/*
1498 * This is an inexact early pruning of any recursive directory
1499 * reading - if the path cannot possibly be in the pathspec,
1500 * return true, and we'll skip it early.
1501 */
e1b8c7bd
BW
1502static int simplify_away(const char *path, int pathlen,
1503 const struct pathspec *pathspec)
9fc42d60 1504{
e1b8c7bd 1505 int i;
9fc42d60 1506
e1b8c7bd
BW
1507 if (!pathspec || !pathspec->nr)
1508 return 0;
1509
1510 GUARD_PATHSPEC(pathspec,
1511 PATHSPEC_FROMTOP |
1512 PATHSPEC_MAXDEPTH |
1513 PATHSPEC_LITERAL |
1514 PATHSPEC_GLOB |
1515 PATHSPEC_ICASE |
b0db7046
BW
1516 PATHSPEC_EXCLUDE |
1517 PATHSPEC_ATTR);
e1b8c7bd
BW
1518
1519 for (i = 0; i < pathspec->nr; i++) {
1520 const struct pathspec_item *item = &pathspec->items[i];
1521 int len = item->nowildcard_len;
1522
1523 if (len > pathlen)
1524 len = pathlen;
1525 if (!ps_strncmp(item, item->match, path, len))
1526 return 0;
9fc42d60 1527 }
e1b8c7bd
BW
1528
1529 return 1;
9fc42d60
LT
1530}
1531
29209cbe
JK
1532/*
1533 * This function tells us whether an excluded path matches a
1534 * list of "interesting" pathspecs. That is, whether a path matched
1535 * by any of the pathspecs could possibly be ignored by excluding
1536 * the specified path. This can happen if:
1537 *
1538 * 1. the path is mentioned explicitly in the pathspec
1539 *
1540 * 2. the path is a directory prefix of some element in the
1541 * pathspec
1542 */
e1b8c7bd
BW
1543static int exclude_matches_pathspec(const char *path, int pathlen,
1544 const struct pathspec *pathspec)
1545{
1546 int i;
1547
1548 if (!pathspec || !pathspec->nr)
1549 return 0;
1550
1551 GUARD_PATHSPEC(pathspec,
1552 PATHSPEC_FROMTOP |
1553 PATHSPEC_MAXDEPTH |
1554 PATHSPEC_LITERAL |
1555 PATHSPEC_GLOB |
1556 PATHSPEC_ICASE |
1557 PATHSPEC_EXCLUDE);
1558
1559 for (i = 0; i < pathspec->nr; i++) {
1560 const struct pathspec_item *item = &pathspec->items[i];
1561 int len = item->nowildcard_len;
1562
1563 if (len == pathlen &&
1564 !ps_strncmp(item, item->match, path, pathlen))
1565 return 1;
1566 if (len > pathlen &&
1567 item->match[pathlen] == '/' &&
1568 !ps_strncmp(item, item->match, path, pathlen))
1569 return 1;
e96980ef
JK
1570 }
1571 return 0;
1572}
1573
98f2a687
BW
1574static int get_index_dtype(struct index_state *istate,
1575 const char *path, int len)
443e061a
LT
1576{
1577 int pos;
9c5e6c80 1578 const struct cache_entry *ce;
443e061a 1579
98f2a687 1580 ce = index_file_exists(istate, path, len, 0);
443e061a
LT
1581 if (ce) {
1582 if (!ce_uptodate(ce))
1583 return DT_UNKNOWN;
1584 if (S_ISGITLINK(ce->ce_mode))
1585 return DT_DIR;
1586 /*
1587 * Nobody actually cares about the
1588 * difference between DT_LNK and DT_REG
1589 */
1590 return DT_REG;
1591 }
1592
1593 /* Try to look it up as a directory */
98f2a687 1594 pos = index_name_pos(istate, path, len);
443e061a
LT
1595 if (pos >= 0)
1596 return DT_UNKNOWN;
1597 pos = -pos-1;
98f2a687
BW
1598 while (pos < istate->cache_nr) {
1599 ce = istate->cache[pos++];
443e061a
LT
1600 if (strncmp(ce->name, path, len))
1601 break;
1602 if (ce->name[len] > '/')
1603 break;
1604 if (ce->name[len] < '/')
1605 continue;
1606 if (!ce_uptodate(ce))
1607 break; /* continue? */
1608 return DT_DIR;
1609 }
1610 return DT_UNKNOWN;
1611}
1612
98f2a687
BW
1613static int get_dtype(struct dirent *de, struct index_state *istate,
1614 const char *path, int len)
07134421 1615{
6831a88a 1616 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1617 struct stat st;
1618
1619 if (dtype != DT_UNKNOWN)
1620 return dtype;
98f2a687 1621 dtype = get_index_dtype(istate, path, len);
443e061a
LT
1622 if (dtype != DT_UNKNOWN)
1623 return dtype;
1624 if (lstat(path, &st))
07134421
LT
1625 return dtype;
1626 if (S_ISREG(st.st_mode))
1627 return DT_REG;
1628 if (S_ISDIR(st.st_mode))
1629 return DT_DIR;
1630 if (S_ISLNK(st.st_mode))
1631 return DT_LNK;
1632 return dtype;
1633}
1634
16e2cfa9 1635static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1636 struct untracked_cache_dir *untracked,
0ef8e169 1637 struct index_state *istate,
49dc2cc2 1638 struct strbuf *path,
2e5910f2 1639 int baselen,
e1b8c7bd 1640 const struct pathspec *pathspec,
16e2cfa9 1641 int dtype, struct dirent *de)
53cc5356 1642{
8aaf8d77 1643 int exclude;
0ef8e169 1644 int has_path_in_index = !!index_file_exists(istate, path->buf, path->len, ignore_case);
07966ed1 1645 enum path_treatment path_treatment;
2eac2a4c 1646
8aaf8d77 1647 if (dtype == DT_UNKNOWN)
0ef8e169 1648 dtype = get_dtype(de, istate, path->buf, path->len);
8aaf8d77
KB
1649
1650 /* Always exclude indexed files */
2eac2a4c 1651 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1652 return path_none;
8aaf8d77 1653
2eac2a4c
JH
1654 /*
1655 * When we are looking at a directory P in the working tree,
1656 * there are three cases:
1657 *
1658 * (1) P exists in the index. Everything inside the directory P in
1659 * the working tree needs to go when P is checked out from the
1660 * index.
1661 *
1662 * (2) P does not exist in the index, but there is P/Q in the index.
1663 * We know P will stay a directory when we check out the contents
1664 * of the index, but we do not know yet if there is a directory
1665 * P/Q in the working tree to be killed, so we need to recurse.
1666 *
1667 * (3) P does not exist in the index, and there is no P/Q in the index
1668 * to require P to be a directory, either. Only in this case, we
1669 * know that everything inside P will not be killed without
1670 * recursing.
1671 */
1672 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1673 (dtype == DT_DIR) &&
de372b1b 1674 !has_path_in_index &&
0ef8e169 1675 (directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent))
de372b1b 1676 return path_none;
8aaf8d77 1677
0ef8e169 1678 exclude = is_excluded(dir, istate, path->buf, &dtype);
53cc5356
JH
1679
1680 /*
1681 * Excluded? If we don't explicitly want to show
1682 * ignored files, ignore it
1683 */
0aaf62b6 1684 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1685 return path_excluded;
53cc5356 1686
53cc5356
JH
1687 switch (dtype) {
1688 default:
defd7c7b 1689 return path_none;
53cc5356 1690 case DT_DIR:
49dc2cc2 1691 strbuf_addch(path, '/');
07966ed1
JM
1692 path_treatment = treat_directory(dir, istate, untracked,
1693 path->buf, path->len,
1694 baselen, exclude, pathspec);
1695 /*
1696 * If 1) we only want to return directories that
1697 * match an exclude pattern and 2) this directory does
1698 * not match an exclude pattern but all of its
1699 * contents are excluded, then indicate that we should
1700 * recurse into this directory (instead of marking the
1701 * directory itself as an ignored path).
1702 */
1703 if (!exclude &&
1704 path_treatment == path_excluded &&
1705 (dir->flags & DIR_SHOW_IGNORED_TOO) &&
1706 (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING))
1707 return path_recurse;
1708 return path_treatment;
53cc5356
JH
1709 case DT_REG:
1710 case DT_LNK:
defd7c7b 1711 return exclude ? path_excluded : path_untracked;
53cc5356 1712 }
53cc5356
JH
1713}
1714
91a2288b
NTND
1715static enum path_treatment treat_path_fast(struct dir_struct *dir,
1716 struct untracked_cache_dir *untracked,
1717 struct cached_dir *cdir,
0ef8e169 1718 struct index_state *istate,
91a2288b
NTND
1719 struct strbuf *path,
1720 int baselen,
e1b8c7bd 1721 const struct pathspec *pathspec)
91a2288b
NTND
1722{
1723 strbuf_setlen(path, baselen);
1724 if (!cdir->ucd) {
1725 strbuf_addstr(path, cdir->file);
1726 return path_untracked;
1727 }
1728 strbuf_addstr(path, cdir->ucd->name);
1729 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1730 strbuf_complete(path, '/');
91a2288b
NTND
1731 if (cdir->ucd->check_only)
1732 /*
1733 * check_only is set as a result of treat_directory() getting
1734 * to its bottom. Verify again the same set of directories
1735 * with check_only set.
1736 */
0ef8e169 1737 return read_directory_recursive(dir, istate, path->buf, path->len,
5aaa7fd3 1738 cdir->ucd, 1, 0, pathspec);
91a2288b
NTND
1739 /*
1740 * We get path_recurse in the first run when
1741 * directory_exists_in_index() returns index_nonexistent. We
1742 * are sure that new changes in the index does not impact the
1743 * outcome. Return now.
1744 */
1745 return path_recurse;
1746}
1747
16e2cfa9 1748static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1749 struct untracked_cache_dir *untracked,
cf7c6148 1750 struct cached_dir *cdir,
0ef8e169 1751 struct index_state *istate,
49dc2cc2 1752 struct strbuf *path,
16e2cfa9 1753 int baselen,
e1b8c7bd 1754 const struct pathspec *pathspec)
16e2cfa9
JH
1755{
1756 int dtype;
cf7c6148 1757 struct dirent *de = cdir->de;
16e2cfa9 1758
91a2288b 1759 if (!de)
0ef8e169 1760 return treat_path_fast(dir, untracked, cdir, istate, path,
e1b8c7bd 1761 baselen, pathspec);
0cacebf0 1762 if (is_dot_or_dotdot(de->d_name) || !fspathcmp(de->d_name, ".git"))
defd7c7b 1763 return path_none;
49dc2cc2
RS
1764 strbuf_setlen(path, baselen);
1765 strbuf_addstr(path, de->d_name);
e1b8c7bd 1766 if (simplify_away(path->buf, path->len, pathspec))
defd7c7b 1767 return path_none;
16e2cfa9
JH
1768
1769 dtype = DTYPE(de);
0ef8e169 1770 return treat_one_path(dir, untracked, istate, path, baselen, pathspec, dtype, de);
0dcb8d7f
NTND
1771}
1772
1773static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1774{
1775 if (!dir)
1776 return;
1777 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1778 dir->untracked_alloc);
1779 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1780}
1781
91a2288b
NTND
1782static int valid_cached_dir(struct dir_struct *dir,
1783 struct untracked_cache_dir *untracked,
207a06ce 1784 struct index_state *istate,
91a2288b
NTND
1785 struct strbuf *path,
1786 int check_only)
1787{
1788 struct stat st;
1789
1790 if (!untracked)
1791 return 0;
1792
883e248b
BP
1793 /*
1794 * With fsmonitor, we can trust the untracked cache's valid field.
1795 */
1796 refresh_fsmonitor(istate);
1797 if (!(dir->untracked->use_fsmonitor && untracked->valid)) {
2523c4be 1798 if (lstat(path->len ? path->buf : ".", &st)) {
883e248b
BP
1799 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1800 return 0;
1801 }
1802 if (!untracked->valid ||
1803 match_stat_data_racy(istate, &untracked->stat_data, &st)) {
883e248b
BP
1804 fill_stat_data(&untracked->stat_data, &st);
1805 return 0;
1806 }
91a2288b
NTND
1807 }
1808
b6403131 1809 if (untracked->check_only != !!check_only)
91a2288b 1810 return 0;
91a2288b
NTND
1811
1812 /*
1813 * prep_exclude will be called eventually on this directory,
1814 * but it's called much later in last_exclude_matching(). We
1815 * need it now to determine the validity of the cache for this
1816 * path. The next calls will be nearly no-op, the way
1817 * prep_exclude() is designed.
1818 */
1819 if (path->len && path->buf[path->len - 1] != '/') {
1820 strbuf_addch(path, '/');
207a06ce 1821 prep_exclude(dir, istate, path->buf, path->len);
91a2288b
NTND
1822 strbuf_setlen(path, path->len - 1);
1823 } else
207a06ce 1824 prep_exclude(dir, istate, path->buf, path->len);
91a2288b
NTND
1825
1826 /* hopefully prep_exclude() haven't invalidated this entry... */
1827 return untracked->valid;
1828}
1829
cf7c6148
NTND
1830static int open_cached_dir(struct cached_dir *cdir,
1831 struct dir_struct *dir,
1832 struct untracked_cache_dir *untracked,
207a06ce 1833 struct index_state *istate,
cf7c6148
NTND
1834 struct strbuf *path,
1835 int check_only)
1836{
b6731550
NTND
1837 const char *c_path;
1838
cf7c6148
NTND
1839 memset(cdir, 0, sizeof(*cdir));
1840 cdir->untracked = untracked;
207a06ce 1841 if (valid_cached_dir(dir, untracked, istate, path, check_only))
91a2288b 1842 return 0;
b6731550
NTND
1843 c_path = path->len ? path->buf : ".";
1844 cdir->fdir = opendir(c_path);
1845 if (!cdir->fdir)
1846 warning_errno(_("could not open directory '%s'"), c_path);
b6403131
NTND
1847 if (dir->untracked) {
1848 invalidate_directory(dir->untracked, untracked);
91a2288b 1849 dir->untracked->dir_opened++;
b6403131 1850 }
cf7c6148
NTND
1851 if (!cdir->fdir)
1852 return -1;
1853 return 0;
1854}
1855
1856static int read_cached_dir(struct cached_dir *cdir)
1857{
1858 if (cdir->fdir) {
1859 cdir->de = readdir(cdir->fdir);
1860 if (!cdir->de)
1861 return -1;
1862 return 0;
1863 }
91a2288b
NTND
1864 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1865 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1866 if (!d->recurse) {
1867 cdir->nr_dirs++;
1868 continue;
1869 }
91a2288b
NTND
1870 cdir->ucd = d;
1871 cdir->nr_dirs++;
1872 return 0;
1873 }
1874 cdir->ucd = NULL;
1875 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1876 struct untracked_cache_dir *d = cdir->untracked;
1877 cdir->file = d->untracked[cdir->nr_files++];
1878 return 0;
1879 }
cf7c6148
NTND
1880 return -1;
1881}
1882
1883static void close_cached_dir(struct cached_dir *cdir)
1884{
1885 if (cdir->fdir)
1886 closedir(cdir->fdir);
91a2288b
NTND
1887 /*
1888 * We have gone through this directory and found no untracked
1889 * entries. Mark it valid.
1890 */
26cb0182 1891 if (cdir->untracked) {
91a2288b 1892 cdir->untracked->valid = 1;
26cb0182
NTND
1893 cdir->untracked->recurse = 1;
1894 }
16e2cfa9
JH
1895}
1896
453ec4bd
LT
1897/*
1898 * Read a directory tree. We currently ignore anything but
1899 * directories, regular files and symlinks. That's because git
1900 * doesn't handle them at all yet. Maybe that will change some
1901 * day.
1902 *
1903 * Also, we ignore the name ".git" (even if it is not a directory).
1904 * That likely will not change.
defd7c7b 1905 *
5aaa7fd3
JM
1906 * If 'stop_at_first_file' is specified, 'path_excluded' is returned
1907 * to signal that a file was found. This is the least significant value that
1908 * indicates that a file was encountered that does not depend on the order of
1909 * whether an untracked or exluded path was encountered first.
1910 *
defd7c7b 1911 * Returns the most significant path_treatment value encountered in the scan.
5aaa7fd3
JM
1912 * If 'stop_at_first_file' is specified, `path_excluded` is the most
1913 * significant path_treatment value that will be returned.
453ec4bd 1914 */
5aaa7fd3 1915
defd7c7b 1916static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0ef8e169
BW
1917 struct index_state *istate, const char *base, int baselen,
1918 struct untracked_cache_dir *untracked, int check_only,
5aaa7fd3 1919 int stop_at_first_file, const struct pathspec *pathspec)
453ec4bd 1920{
cf7c6148 1921 struct cached_dir cdir;
defd7c7b 1922 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1923 struct strbuf path = STRBUF_INIT;
453ec4bd 1924
bef36921 1925 strbuf_add(&path, base, baselen);
02cb6753 1926
0ef8e169 1927 if (open_cached_dir(&cdir, dir, untracked, istate, &path, check_only))
1528d247
RS
1928 goto out;
1929
0dcb8d7f
NTND
1930 if (untracked)
1931 untracked->check_only = !!check_only;
1932
cf7c6148 1933 while (!read_cached_dir(&cdir)) {
defd7c7b 1934 /* check how the file or directory should be treated */
0ef8e169 1935 state = treat_path(dir, untracked, &cdir, istate, &path,
e1b8c7bd 1936 baselen, pathspec);
0dcb8d7f 1937
defd7c7b
KB
1938 if (state > dir_state)
1939 dir_state = state;
1940
1941 /* recurse into subdir if instructed by treat_path */
df5bcdf8
SL
1942 if ((state == path_recurse) ||
1943 ((state == path_untracked) &&
1944 (dir->flags & DIR_SHOW_IGNORED_TOO) &&
f4fd99bf 1945 (get_dtype(cdir.de, istate, path.buf, path.len) == DT_DIR))) {
0dcb8d7f
NTND
1946 struct untracked_cache_dir *ud;
1947 ud = lookup_untracked(dir->untracked, untracked,
1948 path.buf + baselen,
1949 path.len - baselen);
1950 subdir_state =
0ef8e169 1951 read_directory_recursive(dir, istate, path.buf,
e1b8c7bd 1952 path.len, ud,
5aaa7fd3 1953 check_only, stop_at_first_file, pathspec);
defd7c7b
KB
1954 if (subdir_state > dir_state)
1955 dir_state = subdir_state;
1956 }
1957
1958 if (check_only) {
5aaa7fd3
JM
1959 if (stop_at_first_file) {
1960 /*
1961 * If stopping at first file, then
1962 * signal that a file was found by
1963 * returning `path_excluded`. This is
1964 * to return a consistent value
1965 * regardless of whether an ignored or
1966 * excluded file happened to be
1967 * encountered 1st.
1968 *
1969 * In current usage, the
1970 * `stop_at_first_file` is passed when
1971 * an ancestor directory has matched
1972 * an exclude pattern, so any found
1973 * files will be excluded.
1974 */
1975 if (dir_state >= path_excluded) {
1976 dir_state = path_excluded;
1977 break;
1978 }
1979 }
1980
defd7c7b 1981 /* abort early if maximum state has been reached */
0dcb8d7f 1982 if (dir_state == path_untracked) {
91a2288b 1983 if (cdir.fdir)
0dcb8d7f 1984 add_untracked(untracked, path.buf + baselen);
defd7c7b 1985 break;
0dcb8d7f 1986 }
defd7c7b 1987 /* skip the dir_add_* part */
02cb6753 1988 continue;
453ec4bd 1989 }
defd7c7b
KB
1990
1991 /* add the path to the appropriate result list */
1992 switch (state) {
1993 case path_excluded:
1994 if (dir->flags & DIR_SHOW_IGNORED)
0ef8e169 1995 dir_add_name(dir, istate, path.buf, path.len);
0aaf62b6
KB
1996 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1997 ((dir->flags & DIR_COLLECT_IGNORED) &&
1998 exclude_matches_pathspec(path.buf, path.len,
e1b8c7bd 1999 pathspec)))
0ef8e169 2000 dir_add_ignored(dir, istate, path.buf, path.len);
defd7c7b
KB
2001 break;
2002
2003 case path_untracked:
0dcb8d7f
NTND
2004 if (dir->flags & DIR_SHOW_IGNORED)
2005 break;
0ef8e169 2006 dir_add_name(dir, istate, path.buf, path.len);
91a2288b 2007 if (cdir.fdir)
0dcb8d7f 2008 add_untracked(untracked, path.buf + baselen);
1528d247 2009 break;
defd7c7b
KB
2010
2011 default:
2012 break;
2013 }
453ec4bd 2014 }
cf7c6148 2015 close_cached_dir(&cdir);
1528d247 2016 out:
bef36921 2017 strbuf_release(&path);
453ec4bd 2018
defd7c7b 2019 return dir_state;
453ec4bd
LT
2020}
2021
bbf504a9 2022int cmp_dir_entry(const void *p1, const void *p2)
453ec4bd
LT
2023{
2024 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
2025 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
2026
ccdd4a0f 2027 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
2028}
2029
fb898888 2030/* check if *out lexically strictly contains *in */
bbf504a9 2031int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in)
fb898888
SL
2032{
2033 return (out->len < in->len) &&
2034 (out->name[out->len - 1] == '/') &&
2035 !memcmp(out->name, in->name, out->len);
2036}
2037
48ffef96 2038static int treat_leading_path(struct dir_struct *dir,
0ef8e169 2039 struct index_state *istate,
48ffef96 2040 const char *path, int len,
e1b8c7bd 2041 const struct pathspec *pathspec)
48ffef96 2042{
49dc2cc2
RS
2043 struct strbuf sb = STRBUF_INIT;
2044 int baselen, rc = 0;
48ffef96 2045 const char *cp;
be8a84c5 2046 int old_flags = dir->flags;
48ffef96
JH
2047
2048 while (len && path[len - 1] == '/')
2049 len--;
2050 if (!len)
2051 return 1;
2052 baselen = 0;
be8a84c5 2053 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
2054 while (1) {
2055 cp = path + baselen + !!baselen;
2056 cp = memchr(cp, '/', path + len - cp);
2057 if (!cp)
2058 baselen = len;
2059 else
2060 baselen = cp - path;
49dc2cc2
RS
2061 strbuf_setlen(&sb, 0);
2062 strbuf_add(&sb, path, baselen);
2063 if (!is_directory(sb.buf))
2064 break;
e1b8c7bd 2065 if (simplify_away(sb.buf, sb.len, pathspec))
49dc2cc2 2066 break;
0ef8e169 2067 if (treat_one_path(dir, NULL, istate, &sb, baselen, pathspec,
defd7c7b 2068 DT_DIR, NULL) == path_none)
49dc2cc2
RS
2069 break; /* do not recurse into it */
2070 if (len <= baselen) {
2071 rc = 1;
2072 break; /* finished checking */
2073 }
48ffef96 2074 }
49dc2cc2 2075 strbuf_release(&sb);
be8a84c5 2076 dir->flags = old_flags;
49dc2cc2 2077 return rc;
48ffef96
JH
2078}
2079
1e8fef60
NTND
2080static const char *get_ident_string(void)
2081{
2082 static struct strbuf sb = STRBUF_INIT;
2083 struct utsname uts;
2084
2085 if (sb.len)
2086 return sb.buf;
100e4337 2087 if (uname(&uts) < 0)
1e8fef60 2088 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
2089 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
2090 uts.sysname);
1e8fef60
NTND
2091 return sb.buf;
2092}
2093
2094static int ident_in_untracked(const struct untracked_cache *uc)
2095{
0e0f7618
CC
2096 /*
2097 * Previous git versions may have saved many NUL separated
2098 * strings in the "ident" field, but it is insane to manage
2099 * many locations, so just take care of the first one.
2100 */
1e8fef60 2101
0e0f7618 2102 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
2103}
2104
0e0f7618 2105static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 2106{
0e0f7618 2107 strbuf_reset(&uc->ident);
1e8fef60 2108 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
2109
2110 /*
2111 * This strbuf used to contain a list of NUL separated
2112 * strings, so save NUL too for backward compatibility.
2113 */
1e8fef60
NTND
2114 strbuf_addch(&uc->ident, 0);
2115}
2116
4a4ca479
CC
2117static void new_untracked_cache(struct index_state *istate)
2118{
2119 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
2120 strbuf_init(&uc->ident, 100);
2121 uc->exclude_per_dir = ".gitignore";
2122 /* should be the same flags used by git-status */
2123 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 2124 set_untracked_ident(uc);
4a4ca479 2125 istate->untracked = uc;
0e0f7618 2126 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
2127}
2128
2129void add_untracked_cache(struct index_state *istate)
2130{
2131 if (!istate->untracked) {
2132 new_untracked_cache(istate);
0e0f7618
CC
2133 } else {
2134 if (!ident_in_untracked(istate->untracked)) {
2135 free_untracked_cache(istate->untracked);
2136 new_untracked_cache(istate);
2137 }
2138 }
4a4ca479
CC
2139}
2140
07b29bfd
CC
2141void remove_untracked_cache(struct index_state *istate)
2142{
2143 if (istate->untracked) {
2144 free_untracked_cache(istate->untracked);
2145 istate->untracked = NULL;
2146 istate->cache_changed |= UNTRACKED_CHANGED;
2147 }
2148}
2149
ccad261f
NTND
2150static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
2151 int base_len,
2152 const struct pathspec *pathspec)
2153{
2154 struct untracked_cache_dir *root;
026336cb 2155 static int untracked_cache_disabled = -1;
ccad261f 2156
026336cb
JH
2157 if (!dir->untracked)
2158 return NULL;
2159 if (untracked_cache_disabled < 0)
2160 untracked_cache_disabled = git_env_bool("GIT_DISABLE_UNTRACKED_CACHE", 0);
2161 if (untracked_cache_disabled)
ccad261f
NTND
2162 return NULL;
2163
2164 /*
2165 * We only support $GIT_DIR/info/exclude and core.excludesfile
2166 * as the global ignore rule files. Any other additions
2167 * (e.g. from command line) invalidate the cache. This
2168 * condition also catches running setup_standard_excludes()
2169 * before setting dir->untracked!
2170 */
2171 if (dir->unmanaged_exclude_files)
2172 return NULL;
2173
2174 /*
2175 * Optimize for the main use case only: whole-tree git
2176 * status. More work involved in treat_leading_path() if we
2177 * use cache on just a subset of the worktree. pathspec
2178 * support could make the matter even worse.
2179 */
2180 if (base_len || (pathspec && pathspec->nr))
2181 return NULL;
2182
2183 /* Different set of flags may produce different results */
2184 if (dir->flags != dir->untracked->dir_flags ||
2185 /*
2186 * See treat_directory(), case index_nonexistent. Without
2187 * this flag, we may need to also cache .git file content
2188 * for the resolve_gitlink_ref() call, which we don't.
2189 */
2190 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
2191 /* We don't support collecting ignore files */
2192 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
2193 DIR_COLLECT_IGNORED)))
2194 return NULL;
2195
2196 /*
2197 * If we use .gitignore in the cache and now you change it to
2198 * .gitexclude, everything will go wrong.
2199 */
2200 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
2201 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
2202 return NULL;
2203
2204 /*
2205 * EXC_CMDL is not considered in the cache. If people set it,
2206 * skip the cache.
2207 */
2208 if (dir->exclude_list_group[EXC_CMDL].nr)
2209 return NULL;
2210
1e8fef60 2211 if (!ident_in_untracked(dir->untracked)) {
1a07e59c 2212 warning(_("untracked cache is disabled on this system or location"));
1e8fef60
NTND
2213 return NULL;
2214 }
2215
ccad261f
NTND
2216 if (!dir->untracked->root) {
2217 const int len = sizeof(*dir->untracked->root);
2218 dir->untracked->root = xmalloc(len);
2219 memset(dir->untracked->root, 0, len);
2220 }
2221
2222 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
2223 root = dir->untracked->root;
9001dc2a 2224 if (!oideq(&dir->ss_info_exclude.oid,
4b33e602 2225 &dir->untracked->ss_info_exclude.oid)) {
ccad261f
NTND
2226 invalidate_gitignore(dir->untracked, root);
2227 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
2228 }
9001dc2a 2229 if (!oideq(&dir->ss_excludes_file.oid,
4b33e602 2230 &dir->untracked->ss_excludes_file.oid)) {
ccad261f
NTND
2231 invalidate_gitignore(dir->untracked, root);
2232 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
2233 }
26cb0182
NTND
2234
2235 /* Make sure this directory is not dropped out at saving phase */
2236 root->recurse = 1;
ccad261f
NTND
2237 return root;
2238}
2239
2c1eb104
BW
2240int read_directory(struct dir_struct *dir, struct index_state *istate,
2241 const char *path, int len, const struct pathspec *pathspec)
9fc42d60 2242{
ccad261f 2243 struct untracked_cache_dir *untracked;
b4189aa8 2244
c46c406a
NTND
2245 trace_performance_enter();
2246
2247 if (has_symlink_leading_path(path, len)) {
2248 trace_performance_leave("read directory %.*s", len, path);
725b0605 2249 return dir->nr;
c46c406a 2250 }
725b0605 2251
ccad261f
NTND
2252 untracked = validate_untracked_cache(dir, len, pathspec);
2253 if (!untracked)
2254 /*
2255 * make sure untracked cache code path is disabled,
2256 * e.g. prep_exclude()
2257 */
2258 dir->untracked = NULL;
2c1eb104 2259 if (!len || treat_leading_path(dir, istate, path, len, pathspec))
5aaa7fd3 2260 read_directory_recursive(dir, istate, path, len, untracked, 0, 0, pathspec);
bbf504a9
SL
2261 QSORT(dir->entries, dir->nr, cmp_dir_entry);
2262 QSORT(dir->ignored, dir->ignored_nr, cmp_dir_entry);
fb898888
SL
2263
2264 /*
2265 * If DIR_SHOW_IGNORED_TOO is set, read_directory_recursive() will
2266 * also pick up untracked contents of untracked dirs; by default
2267 * we discard these, but given DIR_KEEP_UNTRACKED_CONTENTS we do not.
2268 */
2269 if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&
2270 !(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) {
2271 int i, j;
2272
2273 /* remove from dir->entries untracked contents of untracked dirs */
2274 for (i = j = 0; j < dir->nr; j++) {
bbf504a9
SL
2275 if (i &&
2276 check_dir_entry_contains(dir->entries[i - 1], dir->entries[j])) {
6a83d902 2277 FREE_AND_NULL(dir->entries[j]);
fb898888
SL
2278 } else {
2279 dir->entries[i++] = dir->entries[j];
2280 }
2281 }
2282
2283 dir->nr = i;
2284 }
2285
c46c406a 2286 trace_performance_leave("read directory %.*s", len, path);
c9ccb5d3 2287 if (dir->untracked) {
026336cb 2288 static int force_untracked_cache = -1;
c9ccb5d3 2289 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
026336cb
JH
2290
2291 if (force_untracked_cache < 0)
2292 force_untracked_cache =
2293 git_env_bool("GIT_FORCE_UNTRACKED_CACHE", 0);
c9ccb5d3
NTND
2294 trace_printf_key(&trace_untracked_stats,
2295 "node creation: %u\n"
2296 "gitignore invalidation: %u\n"
2297 "directory invalidation: %u\n"
2298 "opendir: %u\n",
2299 dir->untracked->dir_created,
2300 dir->untracked->gitignore_invalidated,
2301 dir->untracked->dir_invalidated,
2302 dir->untracked->dir_opened);
026336cb 2303 if (force_untracked_cache &&
fc9ecbeb 2304 dir->untracked == istate->untracked &&
1bbb3dba
NTND
2305 (dir->untracked->dir_opened ||
2306 dir->untracked->gitignore_invalidated ||
2307 dir->untracked->dir_invalidated))
2c1eb104
BW
2308 istate->cache_changed |= UNTRACKED_CHANGED;
2309 if (dir->untracked != istate->untracked) {
6a83d902 2310 FREE_AND_NULL(dir->untracked);
1bbb3dba 2311 }
c9ccb5d3 2312 }
453ec4bd
LT
2313 return dir->nr;
2314}
c91f0d92 2315
686a4a06 2316int file_exists(const char *f)
c91f0d92 2317{
686a4a06 2318 struct stat sb;
a50f9fc5 2319 return lstat(f, &sb) == 0;
c91f0d92 2320}
e6636747 2321
0488481e
NTND
2322int repo_file_exists(struct repository *repo, const char *path)
2323{
2324 if (repo != the_repository)
2325 BUG("do not know how to check file existence in arbitrary repo");
2326
2327 return file_exists(path);
2328}
2329
63ec5e1f
JS
2330static int cmp_icase(char a, char b)
2331{
2332 if (a == b)
2333 return 0;
2334 if (ignore_case)
2335 return toupper(a) - toupper(b);
2336 return a - b;
2337}
2338
e6636747 2339/*
9b125da4
NTND
2340 * Given two normalized paths (a trailing slash is ok), if subdir is
2341 * outside dir, return -1. Otherwise return the offset in subdir that
2342 * can be used as relative path to dir.
e6636747 2343 */
9b125da4 2344int dir_inside_of(const char *subdir, const char *dir)
e6636747 2345{
9b125da4 2346 int offset = 0;
e6636747 2347
9b125da4 2348 assert(dir && subdir && *dir && *subdir);
e6636747 2349
63ec5e1f 2350 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2351 dir++;
9b125da4
NTND
2352 subdir++;
2353 offset++;
490544b1 2354 }
9b125da4
NTND
2355
2356 /* hel[p]/me vs hel[l]/yeah */
2357 if (*dir && *subdir)
2358 return -1;
2359
2360 if (!*subdir)
2361 return !*dir ? offset : -1; /* same dir */
2362
2363 /* foo/[b]ar vs foo/[] */
2364 if (is_dir_sep(dir[-1]))
2365 return is_dir_sep(subdir[-1]) ? offset : -1;
2366
2367 /* foo[/]bar vs foo[] */
2368 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2369}
2370
2371int is_inside_dir(const char *dir)
2372{
56b9f6e7
RS
2373 char *cwd;
2374 int rc;
2375
b892913d
NTND
2376 if (!dir)
2377 return 0;
56b9f6e7
RS
2378
2379 cwd = xgetcwd();
2380 rc = (dir_inside_of(cwd, dir) >= 0);
2381 free(cwd);
2382 return rc;
e6636747 2383}
7155b727 2384
55892d23
AP
2385int is_empty_dir(const char *path)
2386{
2387 DIR *dir = opendir(path);
2388 struct dirent *e;
2389 int ret = 1;
2390
2391 if (!dir)
2392 return 0;
2393
2394 while ((e = readdir(dir)) != NULL)
2395 if (!is_dot_or_dotdot(e->d_name)) {
2396 ret = 0;
2397 break;
2398 }
2399
2400 closedir(dir);
2401 return ret;
2402}
2403
ae2f203e 2404static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2405{
a0f4afbe 2406 DIR *dir;
7155b727 2407 struct dirent *e;
ae2f203e 2408 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2409 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2410 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
1053fe82 2411 struct object_id submodule_head;
7155b727 2412
a0f4afbe 2413 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
a98e6101 2414 !resolve_gitlink_ref(path->buf, "HEAD", &submodule_head)) {
a0f4afbe 2415 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2416 if (kept_up)
2417 *kept_up = 1;
a0f4afbe 2418 return 0;
ae2f203e 2419 }
a0f4afbe 2420
ae2f203e 2421 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2422 dir = opendir(path->buf);
c844a803 2423 if (!dir) {
863808cd
MH
2424 if (errno == ENOENT)
2425 return keep_toplevel ? -1 : 0;
2426 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2427 /*
2428 * An empty dir could be removable even if it
2429 * is unreadable:
2430 */
c844a803
JH
2431 return rmdir(path->buf);
2432 else
2433 return -1;
2434 }
00b6c178 2435 strbuf_complete(path, '/');
7155b727
JS
2436
2437 len = path->len;
2438 while ((e = readdir(dir)) != NULL) {
2439 struct stat st;
8ca12c0d
AP
2440 if (is_dot_or_dotdot(e->d_name))
2441 continue;
7155b727
JS
2442
2443 strbuf_setlen(path, len);
2444 strbuf_addstr(path, e->d_name);
863808cd
MH
2445 if (lstat(path->buf, &st)) {
2446 if (errno == ENOENT)
2447 /*
2448 * file disappeared, which is what we
2449 * wanted anyway
2450 */
2451 continue;
2452 /* fall thru */
2453 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2454 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2455 continue; /* happy */
863808cd
MH
2456 } else if (!only_empty &&
2457 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2458 continue; /* happy, too */
863808cd 2459 }
7155b727
JS
2460
2461 /* path too long, stat fails, or non-directory still exists */
2462 ret = -1;
2463 break;
2464 }
2465 closedir(dir);
2466
2467 strbuf_setlen(path, original_len);
ae2f203e 2468 if (!ret && !keep_toplevel && !kept_down)
863808cd 2469 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2470 else if (kept_up)
2471 /*
2472 * report the uplevel that it is not an error that we
2473 * did not rmdir() our directory.
2474 */
2475 *kept_up = !ret;
7155b727
JS
2476 return ret;
2477}
039bc64e 2478
ae2f203e
JH
2479int remove_dir_recursively(struct strbuf *path, int flag)
2480{
2481 return remove_dir_recurse(path, flag, NULL);
2482}
2483
f932729c
JK
2484static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2485
039bc64e
JH
2486void setup_standard_excludes(struct dir_struct *dir)
2487{
039bc64e 2488 dir->exclude_per_dir = ".gitignore";
099d2d86 2489
51d18631 2490 /* core.excludesfile defaulting to $XDG_CONFIG_HOME/git/ignore */
2845ce7f
PT
2491 if (!excludes_file)
2492 excludes_file = xdg_config_home("ignore");
4698c8fe 2493 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2494 add_excludes_from_file_1(dir, excludes_file,
2495 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2496
2497 /* per repository user preference */
f0056f64
JK
2498 if (startup_info->have_repository) {
2499 const char *path = git_path_info_exclude();
2500 if (!access_or_warn(path, R_OK, 0))
2501 add_excludes_from_file_1(dir, path,
2502 dir->untracked ? &dir->ss_info_exclude : NULL);
2503 }
039bc64e 2504}
4a92d1bf
AR
2505
2506int remove_path(const char *name)
2507{
2508 char *slash;
2509
c7054209 2510 if (unlink(name) && !is_missing_file_error(errno))
4a92d1bf
AR
2511 return -1;
2512
2513 slash = strrchr(name, '/');
2514 if (slash) {
2515 char *dirs = xstrdup(name);
2516 slash = dirs + (slash - name);
2517 do {
2518 *slash = '\0';
3fc0d131 2519 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2520 free(dirs);
2521 }
2522 return 0;
2523}
2524
270be816
AS
2525/*
2526 * Frees memory within dir which was allocated for exclude lists and
2527 * the exclude_stack. Does not free dir itself.
2528 */
2529void clear_directory(struct dir_struct *dir)
2530{
2531 int i, j;
2532 struct exclude_list_group *group;
2533 struct exclude_list *el;
2534 struct exclude_stack *stk;
2535
2536 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2537 group = &dir->exclude_list_group[i];
2538 for (j = 0; j < group->nr; j++) {
2539 el = &group->el[j];
2540 if (i == EXC_DIRS)
2541 free((char *)el->src);
2542 clear_exclude_list(el);
2543 }
2544 free(group->el);
2545 }
2546
2547 stk = dir->exclude_stack;
2548 while (stk) {
2549 struct exclude_stack *prev = stk->prev;
2550 free(stk);
2551 stk = prev;
2552 }
aceb9429 2553 strbuf_release(&dir->basebuf);
270be816 2554}
83c094ad
NTND
2555
2556struct ondisk_untracked_cache {
2557 struct stat_data info_exclude_stat;
2558 struct stat_data excludes_file_stat;
2559 uint32_t dir_flags;
83c094ad
NTND
2560};
2561
268ba201 2562#define ouc_offset(x) offsetof(struct ondisk_untracked_cache, x)
83c094ad
NTND
2563
2564struct write_data {
2565 int index; /* number of written untracked_cache_dir */
2566 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2567 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2568 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2569 struct strbuf out;
2570 struct strbuf sb_stat;
2571 struct strbuf sb_sha1;
2572};
2573
2574static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2575{
2576 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2577 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2578 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2579 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2580 to->sd_dev = htonl(from->sd_dev);
2581 to->sd_ino = htonl(from->sd_ino);
2582 to->sd_uid = htonl(from->sd_uid);
2583 to->sd_gid = htonl(from->sd_gid);
2584 to->sd_size = htonl(from->sd_size);
2585}
2586
2587static void write_one_dir(struct untracked_cache_dir *untracked,
2588 struct write_data *wd)
2589{
2590 struct stat_data stat_data;
2591 struct strbuf *out = &wd->out;
2592 unsigned char intbuf[16];
2593 unsigned int intlen, value;
2594 int i = wd->index++;
2595
2596 /*
2597 * untracked_nr should be reset whenever valid is clear, but
2598 * for safety..
2599 */
2600 if (!untracked->valid) {
2601 untracked->untracked_nr = 0;
2602 untracked->check_only = 0;
2603 }
2604
2605 if (untracked->check_only)
2606 ewah_set(wd->check_only, i);
2607 if (untracked->valid) {
2608 ewah_set(wd->valid, i);
2609 stat_data_to_disk(&stat_data, &untracked->stat_data);
2610 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2611 }
70c369cd 2612 if (!is_null_oid(&untracked->exclude_oid)) {
83c094ad 2613 ewah_set(wd->sha1_valid, i);
70c369cd 2614 strbuf_add(&wd->sb_sha1, untracked->exclude_oid.hash,
2615 the_hash_algo->rawsz);
83c094ad
NTND
2616 }
2617
2618 intlen = encode_varint(untracked->untracked_nr, intbuf);
2619 strbuf_add(out, intbuf, intlen);
2620
2621 /* skip non-recurse directories */
2622 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2623 if (untracked->dirs[i]->recurse)
2624 value++;
2625 intlen = encode_varint(value, intbuf);
2626 strbuf_add(out, intbuf, intlen);
2627
2628 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2629
2630 for (i = 0; i < untracked->untracked_nr; i++)
2631 strbuf_add(out, untracked->untracked[i],
2632 strlen(untracked->untracked[i]) + 1);
2633
2634 for (i = 0; i < untracked->dirs_nr; i++)
2635 if (untracked->dirs[i]->recurse)
2636 write_one_dir(untracked->dirs[i], wd);
2637}
2638
2639void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2640{
2641 struct ondisk_untracked_cache *ouc;
2642 struct write_data wd;
2643 unsigned char varbuf[16];
e0b83735 2644 int varint_len;
3899b88b 2645 const unsigned hashsz = the_hash_algo->rawsz;
e0b83735 2646
3899b88b 2647 ouc = xcalloc(1, sizeof(*ouc));
83c094ad
NTND
2648 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2649 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
83c094ad 2650 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2651
2652 varint_len = encode_varint(untracked->ident.len, varbuf);
2653 strbuf_add(out, varbuf, varint_len);
8109984d 2654 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2655
3899b88b 2656 strbuf_add(out, ouc, sizeof(*ouc));
2657 strbuf_add(out, untracked->ss_info_exclude.oid.hash, hashsz);
2658 strbuf_add(out, untracked->ss_excludes_file.oid.hash, hashsz);
2659 strbuf_add(out, untracked->exclude_per_dir, strlen(untracked->exclude_per_dir) + 1);
6a83d902 2660 FREE_AND_NULL(ouc);
83c094ad
NTND
2661
2662 if (!untracked->root) {
2663 varint_len = encode_varint(0, varbuf);
2664 strbuf_add(out, varbuf, varint_len);
2665 return;
2666 }
2667
2668 wd.index = 0;
2669 wd.check_only = ewah_new();
2670 wd.valid = ewah_new();
2671 wd.sha1_valid = ewah_new();
2672 strbuf_init(&wd.out, 1024);
2673 strbuf_init(&wd.sb_stat, 1024);
2674 strbuf_init(&wd.sb_sha1, 1024);
2675 write_one_dir(untracked->root, &wd);
2676
2677 varint_len = encode_varint(wd.index, varbuf);
2678 strbuf_add(out, varbuf, varint_len);
2679 strbuf_addbuf(out, &wd.out);
2680 ewah_serialize_strbuf(wd.valid, out);
2681 ewah_serialize_strbuf(wd.check_only, out);
2682 ewah_serialize_strbuf(wd.sha1_valid, out);
2683 strbuf_addbuf(out, &wd.sb_stat);
2684 strbuf_addbuf(out, &wd.sb_sha1);
2685 strbuf_addch(out, '\0'); /* safe guard for string lists */
2686
2687 ewah_free(wd.valid);
2688 ewah_free(wd.check_only);
2689 ewah_free(wd.sha1_valid);
2690 strbuf_release(&wd.out);
2691 strbuf_release(&wd.sb_stat);
2692 strbuf_release(&wd.sb_sha1);
2693}
f9e6c649
NTND
2694
2695static void free_untracked(struct untracked_cache_dir *ucd)
2696{
2697 int i;
2698 if (!ucd)
2699 return;
2700 for (i = 0; i < ucd->dirs_nr; i++)
2701 free_untracked(ucd->dirs[i]);
2702 for (i = 0; i < ucd->untracked_nr; i++)
2703 free(ucd->untracked[i]);
2704 free(ucd->untracked);
2705 free(ucd->dirs);
2706 free(ucd);
2707}
2708
2709void free_untracked_cache(struct untracked_cache *uc)
2710{
2711 if (uc)
2712 free_untracked(uc->root);
2713 free(uc);
2714}
2715
2716struct read_data {
2717 int index;
2718 struct untracked_cache_dir **ucd;
2719 struct ewah_bitmap *check_only;
2720 struct ewah_bitmap *valid;
2721 struct ewah_bitmap *sha1_valid;
2722 const unsigned char *data;
2723 const unsigned char *end;
2724};
2725
268ba201 2726static void stat_data_from_disk(struct stat_data *to, const unsigned char *data)
f9e6c649 2727{
268ba201
RS
2728 memcpy(to, data, sizeof(*to));
2729 to->sd_ctime.sec = ntohl(to->sd_ctime.sec);
2730 to->sd_ctime.nsec = ntohl(to->sd_ctime.nsec);
2731 to->sd_mtime.sec = ntohl(to->sd_mtime.sec);
2732 to->sd_mtime.nsec = ntohl(to->sd_mtime.nsec);
2733 to->sd_dev = ntohl(to->sd_dev);
2734 to->sd_ino = ntohl(to->sd_ino);
2735 to->sd_uid = ntohl(to->sd_uid);
2736 to->sd_gid = ntohl(to->sd_gid);
2737 to->sd_size = ntohl(to->sd_size);
f9e6c649
NTND
2738}
2739
2740static int read_one_dir(struct untracked_cache_dir **untracked_,
2741 struct read_data *rd)
2742{
2743 struct untracked_cache_dir ud, *untracked;
b511d6d5 2744 const unsigned char *data = rd->data, *end = rd->end;
c6909f99 2745 const unsigned char *eos;
f9e6c649 2746 unsigned int value;
08bf354d 2747 int i;
f9e6c649
NTND
2748
2749 memset(&ud, 0, sizeof(ud));
2750
b511d6d5
JK
2751 value = decode_varint(&data);
2752 if (data > end)
f9e6c649
NTND
2753 return -1;
2754 ud.recurse = 1;
2755 ud.untracked_alloc = value;
2756 ud.untracked_nr = value;
2757 if (ud.untracked_nr)
b32fa95f 2758 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649 2759
b511d6d5
JK
2760 ud.dirs_alloc = ud.dirs_nr = decode_varint(&data);
2761 if (data > end)
f9e6c649 2762 return -1;
b32fa95f 2763 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649 2764
c6909f99
JK
2765 eos = memchr(data, '\0', end - data);
2766 if (!eos || eos == end)
f9e6c649 2767 return -1;
c6909f99 2768
08bf354d 2769 *untracked_ = untracked = xmalloc(st_add3(sizeof(*untracked), eos - data, 1));
f9e6c649 2770 memcpy(untracked, &ud, sizeof(ud));
08bf354d 2771 memcpy(untracked->name, data, eos - data + 1);
b511d6d5 2772 data = eos + 1;
f9e6c649
NTND
2773
2774 for (i = 0; i < untracked->untracked_nr; i++) {
c6909f99
JK
2775 eos = memchr(data, '\0', end - data);
2776 if (!eos || eos == end)
f9e6c649 2777 return -1;
08bf354d 2778 untracked->untracked[i] = xmemdupz(data, eos - data);
b511d6d5 2779 data = eos + 1;
f9e6c649
NTND
2780 }
2781
2782 rd->ucd[rd->index++] = untracked;
2783 rd->data = data;
2784
2785 for (i = 0; i < untracked->dirs_nr; i++) {
08bf354d 2786 if (read_one_dir(untracked->dirs + i, rd) < 0)
f9e6c649
NTND
2787 return -1;
2788 }
2789 return 0;
2790}
2791
2792static void set_check_only(size_t pos, void *cb)
2793{
2794 struct read_data *rd = cb;
2795 struct untracked_cache_dir *ud = rd->ucd[pos];
2796 ud->check_only = 1;
2797}
2798
2799static void read_stat(size_t pos, void *cb)
2800{
2801 struct read_data *rd = cb;
2802 struct untracked_cache_dir *ud = rd->ucd[pos];
2803 if (rd->data + sizeof(struct stat_data) > rd->end) {
2804 rd->data = rd->end + 1;
2805 return;
2806 }
268ba201 2807 stat_data_from_disk(&ud->stat_data, rd->data);
f9e6c649
NTND
2808 rd->data += sizeof(struct stat_data);
2809 ud->valid = 1;
2810}
2811
70c369cd 2812static void read_oid(size_t pos, void *cb)
f9e6c649
NTND
2813{
2814 struct read_data *rd = cb;
2815 struct untracked_cache_dir *ud = rd->ucd[pos];
70c369cd 2816 if (rd->data + the_hash_algo->rawsz > rd->end) {
f9e6c649
NTND
2817 rd->data = rd->end + 1;
2818 return;
2819 }
70c369cd 2820 hashcpy(ud->exclude_oid.hash, rd->data);
2821 rd->data += the_hash_algo->rawsz;
f9e6c649
NTND
2822}
2823
4b33e602
PO
2824static void load_oid_stat(struct oid_stat *oid_stat, const unsigned char *data,
2825 const unsigned char *sha1)
f9e6c649 2826{
4b33e602
PO
2827 stat_data_from_disk(&oid_stat->stat, data);
2828 hashcpy(oid_stat->oid.hash, sha1);
2829 oid_stat->valid = 1;
f9e6c649
NTND
2830}
2831
2832struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2833{
f9e6c649
NTND
2834 struct untracked_cache *uc;
2835 struct read_data rd;
2836 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60 2837 const char *ident;
1140bf01
JK
2838 int ident_len;
2839 ssize_t len;
268ba201 2840 const char *exclude_per_dir;
3899b88b 2841 const unsigned hashsz = the_hash_algo->rawsz;
2842 const unsigned offset = sizeof(struct ondisk_untracked_cache);
2843 const unsigned exclude_per_dir_offset = offset + 2 * hashsz;
f9e6c649
NTND
2844
2845 if (sz <= 1 || end[-1] != '\0')
2846 return NULL;
2847 end--;
2848
1e8fef60
NTND
2849 ident_len = decode_varint(&next);
2850 if (next + ident_len > end)
2851 return NULL;
2852 ident = (const char *)next;
2853 next += ident_len;
2854
3899b88b 2855 if (next + exclude_per_dir_offset + 1 > end)
f9e6c649
NTND
2856 return NULL;
2857
2858 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2859 strbuf_init(&uc->ident, ident_len);
2860 strbuf_add(&uc->ident, ident, ident_len);
4b33e602
PO
2861 load_oid_stat(&uc->ss_info_exclude,
2862 next + ouc_offset(info_exclude_stat),
3899b88b 2863 next + offset);
4b33e602
PO
2864 load_oid_stat(&uc->ss_excludes_file,
2865 next + ouc_offset(excludes_file_stat),
3899b88b 2866 next + offset + hashsz);
268ba201 2867 uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
3899b88b 2868 exclude_per_dir = (const char *)next + exclude_per_dir_offset;
268ba201 2869 uc->exclude_per_dir = xstrdup(exclude_per_dir);
f9e6c649 2870 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
3899b88b 2871 next += exclude_per_dir_offset + strlen(exclude_per_dir) + 1;
f9e6c649
NTND
2872 if (next >= end)
2873 goto done2;
2874
2875 len = decode_varint(&next);
2876 if (next > end || len == 0)
2877 goto done2;
2878
2879 rd.valid = ewah_new();
2880 rd.check_only = ewah_new();
2881 rd.sha1_valid = ewah_new();
2882 rd.data = next;
2883 rd.end = end;
2884 rd.index = 0;
b32fa95f 2885 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2886
2887 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2888 goto done;
2889
2890 next = rd.data;
2891 len = ewah_read_mmap(rd.valid, next, end - next);
2892 if (len < 0)
2893 goto done;
2894
2895 next += len;
2896 len = ewah_read_mmap(rd.check_only, next, end - next);
2897 if (len < 0)
2898 goto done;
2899
2900 next += len;
2901 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2902 if (len < 0)
2903 goto done;
2904
2905 ewah_each_bit(rd.check_only, set_check_only, &rd);
2906 rd.data = next + len;
2907 ewah_each_bit(rd.valid, read_stat, &rd);
70c369cd 2908 ewah_each_bit(rd.sha1_valid, read_oid, &rd);
f9e6c649
NTND
2909 next = rd.data;
2910
2911done:
2912 free(rd.ucd);
2913 ewah_free(rd.valid);
2914 ewah_free(rd.check_only);
2915 ewah_free(rd.sha1_valid);
2916done2:
2917 if (next != end) {
2918 free_untracked_cache(uc);
2919 uc = NULL;
2920 }
2921 return uc;
2922}
e931371a 2923
73f9145f
NTND
2924static void invalidate_one_directory(struct untracked_cache *uc,
2925 struct untracked_cache_dir *ucd)
2926{
2927 uc->dir_invalidated++;
2928 ucd->valid = 0;
2929 ucd->untracked_nr = 0;
2930}
2931
2932/*
2933 * Normally when an entry is added or removed from a directory,
2934 * invalidating that directory is enough. No need to touch its
2935 * ancestors. When a directory is shown as "foo/bar/" in git-status
2936 * however, deleting or adding an entry may have cascading effect.
2937 *
2938 * Say the "foo/bar/file" has become untracked, we need to tell the
2939 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2940 * directory any more (because "bar" is managed by foo as an untracked
2941 * "file").
2942 *
2943 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2944 * was the last untracked entry in the entire "foo", we should show
2945 * "foo/" instead. Which means we have to invalidate past "bar" up to
2946 * "foo".
2947 *
2948 * This function traverses all directories from root to leaf. If there
2949 * is a chance of one of the above cases happening, we invalidate back
2950 * to root. Otherwise we just invalidate the leaf. There may be a more
2951 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2952 * detect these cases and avoid unnecessary invalidation, for example,
2953 * checking for the untracked entry named "bar/" in "foo", but for now
2954 * stick to something safe and simple.
2955 */
2956static int invalidate_one_component(struct untracked_cache *uc,
2957 struct untracked_cache_dir *dir,
2958 const char *path, int len)
2959{
2960 const char *rest = strchr(path, '/');
2961
2962 if (rest) {
2963 int component_len = rest - path;
2964 struct untracked_cache_dir *d =
2965 lookup_untracked(uc, dir, path, component_len);
2966 int ret =
2967 invalidate_one_component(uc, d, rest + 1,
2968 len - (component_len + 1));
2969 if (ret)
2970 invalidate_one_directory(uc, dir);
2971 return ret;
2972 }
2973
2974 invalidate_one_directory(uc, dir);
2975 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2976}
2977
e931371a 2978void untracked_cache_invalidate_path(struct index_state *istate,
0cacebf0 2979 const char *path, int safe_path)
e931371a 2980{
e931371a
NTND
2981 if (!istate->untracked || !istate->untracked->root)
2982 return;
68f95b26 2983 if (!safe_path && !verify_path(path, 0))
0cacebf0 2984 return;
73f9145f
NTND
2985 invalidate_one_component(istate->untracked, istate->untracked->root,
2986 path, strlen(path));
e931371a
NTND
2987}
2988
2989void untracked_cache_remove_from_index(struct index_state *istate,
2990 const char *path)
2991{
0cacebf0 2992 untracked_cache_invalidate_path(istate, path, 1);
e931371a
NTND
2993}
2994
2995void untracked_cache_add_to_index(struct index_state *istate,
2996 const char *path)
2997{
0cacebf0 2998 untracked_cache_invalidate_path(istate, path, 1);
e931371a 2999}
47e83eb3 3000
da62f786
SB
3001static void connect_wt_gitdir_in_nested(const char *sub_worktree,
3002 const char *sub_gitdir)
3003{
3004 int i;
3005 struct repository subrepo;
3006 struct strbuf sub_wt = STRBUF_INIT;
3007 struct strbuf sub_gd = STRBUF_INIT;
3008
3009 const struct submodule *sub;
3010
3011 /* If the submodule has no working tree, we can ignore it. */
3012 if (repo_init(&subrepo, sub_gitdir, sub_worktree))
3013 return;
3014
3015 if (repo_read_index(&subrepo) < 0)
a80897c1 3016 die(_("index file corrupt in repo %s"), subrepo.gitdir);
da62f786
SB
3017
3018 for (i = 0; i < subrepo.index->cache_nr; i++) {
3019 const struct cache_entry *ce = subrepo.index->cache[i];
3020
3021 if (!S_ISGITLINK(ce->ce_mode))
3022 continue;
3023
3024 while (i + 1 < subrepo.index->cache_nr &&
3025 !strcmp(ce->name, subrepo.index->cache[i + 1]->name))
3026 /*
3027 * Skip entries with the same name in different stages
3028 * to make sure an entry is returned only once.
3029 */
3030 i++;
3031
3032 sub = submodule_from_path(&subrepo, &null_oid, ce->name);
3033 if (!sub || !is_submodule_active(&subrepo, ce->name))
3034 /* .gitmodules broken or inactive sub */
3035 continue;
3036
3037 strbuf_reset(&sub_wt);
3038 strbuf_reset(&sub_gd);
3039 strbuf_addf(&sub_wt, "%s/%s", sub_worktree, sub->path);
3040 strbuf_addf(&sub_gd, "%s/modules/%s", sub_gitdir, sub->name);
3041
3042 connect_work_tree_and_git_dir(sub_wt.buf, sub_gd.buf, 1);
3043 }
3044 strbuf_release(&sub_wt);
3045 strbuf_release(&sub_gd);
3046 repo_clear(&subrepo);
3047}
3048
3049void connect_work_tree_and_git_dir(const char *work_tree_,
3050 const char *git_dir_,
3051 int recurse_into_nested)
47e83eb3 3052{
365444a6
SB
3053 struct strbuf gitfile_sb = STRBUF_INIT;
3054 struct strbuf cfg_sb = STRBUF_INIT;
47e83eb3 3055 struct strbuf rel_path = STRBUF_INIT;
365444a6 3056 char *git_dir, *work_tree;
47e83eb3 3057
365444a6
SB
3058 /* Prepare .git file */
3059 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);
3060 if (safe_create_leading_directories_const(gitfile_sb.buf))
3061 die(_("could not create directories for %s"), gitfile_sb.buf);
3062
3063 /* Prepare config file */
3064 strbuf_addf(&cfg_sb, "%s/config", git_dir_);
3065 if (safe_create_leading_directories_const(cfg_sb.buf))
3066 die(_("could not create directories for %s"), cfg_sb.buf);
47e83eb3 3067
e394fa01
JH
3068 git_dir = real_pathdup(git_dir_, 1);
3069 work_tree = real_pathdup(work_tree_, 1);
365444a6
SB
3070
3071 /* Write .git file */
3072 write_file(gitfile_sb.buf, "gitdir: %s",
3073 relative_path(git_dir, work_tree, &rel_path));
47e83eb3 3074 /* Update core.worktree setting */
365444a6 3075 git_config_set_in_file(cfg_sb.buf, "core.worktree",
47e83eb3
SB
3076 relative_path(work_tree, git_dir, &rel_path));
3077
365444a6
SB
3078 strbuf_release(&gitfile_sb);
3079 strbuf_release(&cfg_sb);
47e83eb3 3080 strbuf_release(&rel_path);
da62f786
SB
3081
3082 if (recurse_into_nested)
3083 connect_wt_gitdir_in_nested(work_tree, git_dir);
3084
47e83eb3
SB
3085 free(work_tree);
3086 free(git_dir);
3087}
f6f85861
SB
3088
3089/*
3090 * Migrate the git directory of the given path from old_git_dir to new_git_dir.
3091 */
3092void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
3093{
3094 if (rename(old_git_dir, new_git_dir) < 0)
3095 die_errno(_("could not migrate git directory from '%s' to '%s'"),
3096 old_git_dir, new_git_dir);
3097
da62f786 3098 connect_work_tree_and_git_dir(path, new_git_dir, 0);
f6f85861 3099}