dir: convert open_cached_dir to take an index
[git/git.git] / dir.c
CommitLineData
453ec4bd
LT
1/*
2 * This handles recursive filename detection with exclude
3 * files, index knowledge etc..
4 *
95a68344
AS
5 * See Documentation/technical/api-directory-listing.txt
6 *
453ec4bd
LT
7 * Copyright (C) Linus Torvalds, 2005-2006
8 * Junio Hamano, 2005-2006
9 */
12cd0bf9 10#define NO_THE_INDEX_COMPATIBILITY_MACROS
453ec4bd
LT
11#include "cache.h"
12#include "dir.h"
b0db7046 13#include "attr.h"
09595258 14#include "refs.h"
237ec6e4 15#include "wildmatch.h"
64acde94 16#include "pathspec.h"
dde843e7 17#include "utf8.h"
83c094ad
NTND
18#include "varint.h"
19#include "ewah/ewok.h"
453ec4bd 20
defd7c7b
KB
21/*
22 * Tells read_directory_recursive how a file or directory should be treated.
23 * Values are ordered by significance, e.g. if a directory contains both
24 * excluded and untracked files, it is listed as untracked because
25 * path_untracked > path_excluded.
26 */
27enum path_treatment {
28 path_none = 0,
29 path_recurse,
30 path_excluded,
31 path_untracked
32};
33
cf7c6148
NTND
34/*
35 * Support data structure for our opendir/readdir/closedir wrappers
36 */
37struct cached_dir {
38 DIR *fdir;
39 struct untracked_cache_dir *untracked;
91a2288b
NTND
40 int nr_files;
41 int nr_dirs;
42
cf7c6148 43 struct dirent *de;
91a2288b
NTND
44 const char *file;
45 struct untracked_cache_dir *ucd;
cf7c6148
NTND
46};
47
defd7c7b 48static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0dcb8d7f 49 const char *path, int len, struct untracked_cache_dir *untracked,
e1b8c7bd 50 int check_only, const struct pathspec *pathspec);
98f2a687
BW
51static int get_dtype(struct dirent *de, struct index_state *istate,
52 const char *path, int len);
09595258 53
ba0897e6 54int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
55{
56 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
57}
58
ba0897e6 59int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
60{
61 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
62}
63
1f26ce61
CB
64int git_fnmatch(const struct pathspec_item *item,
65 const char *pattern, const char *string,
66 int prefix)
5d74762d 67{
5d74762d 68 if (prefix > 0) {
93d93537 69 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 70 return WM_NOMATCH;
5d74762d
NTND
71 pattern += prefix;
72 string += prefix;
73 }
bd30c2e4 74 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
75 int pattern_len = strlen(++pattern);
76 int string_len = strlen(string);
77 return string_len < pattern_len ||
93d93537
NTND
78 ps_strcmp(item, pattern,
79 string + string_len - pattern_len);
8c6abbcd 80 }
bd30c2e4 81 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
82 return wildmatch(pattern, string,
83 WM_PATHNAME |
84 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0),
85 NULL);
bd30c2e4
NTND
86 else
87 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f
NTND
88 return wildmatch(pattern, string,
89 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
90 NULL);
5d74762d
NTND
91}
92
0b6e56df
JH
93static int fnmatch_icase_mem(const char *pattern, int patternlen,
94 const char *string, int stringlen,
95 int flags)
96{
97 int match_status;
98 struct strbuf pat_buf = STRBUF_INIT;
99 struct strbuf str_buf = STRBUF_INIT;
100 const char *use_pat = pattern;
101 const char *use_str = string;
102
103 if (pattern[patternlen]) {
104 strbuf_add(&pat_buf, pattern, patternlen);
105 use_pat = pat_buf.buf;
106 }
107 if (string[stringlen]) {
108 strbuf_add(&str_buf, string, stringlen);
109 use_str = str_buf.buf;
110 }
111
f30366b2
JH
112 if (ignore_case)
113 flags |= WM_CASEFOLD;
114 match_status = wildmatch(use_pat, use_str, flags, NULL);
0b6e56df
JH
115
116 strbuf_release(&pat_buf);
117 strbuf_release(&str_buf);
118
119 return match_status;
120}
121
827f4d6c 122static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 123{
827f4d6c 124 int n;
4a085b16 125 size_t max = 0;
3c6a370b 126
93d93537
NTND
127 /*
128 * ":(icase)path" is treated as a pathspec full of
129 * wildcard. In other words, only prefix is considered common
130 * prefix. If the pathspec is abc/foo abc/bar, running in
131 * subdir xyz, the common prefix is still xyz, not xuz/abc as
132 * in non-:(icase).
133 */
5c6933d2
NTND
134 GUARD_PATHSPEC(pathspec,
135 PATHSPEC_FROMTOP |
136 PATHSPEC_MAXDEPTH |
bd30c2e4 137 PATHSPEC_LITERAL |
93d93537 138 PATHSPEC_GLOB |
ef79b1f8 139 PATHSPEC_ICASE |
b0db7046
BW
140 PATHSPEC_EXCLUDE |
141 PATHSPEC_ATTR);
4a085b16 142
827f4d6c 143 for (n = 0; n < pathspec->nr; n++) {
93d93537 144 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
145 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
146 continue;
93d93537
NTND
147 if (pathspec->items[n].magic & PATHSPEC_ICASE)
148 item_len = pathspec->items[n].prefix;
149 else
150 item_len = pathspec->items[n].nowildcard_len;
151 while (i < item_len && (n == 0 || i < max)) {
827f4d6c
NTND
152 char c = pathspec->items[n].match[i];
153 if (c != pathspec->items[0].match[i])
4a085b16
JH
154 break;
155 if (c == '/')
156 len = i + 1;
827f4d6c 157 i++;
4a085b16 158 }
827f4d6c 159 if (n == 0 || len < max) {
4a085b16
JH
160 max = len;
161 if (!max)
162 break;
163 }
3c6a370b 164 }
4a085b16 165 return max;
3c6a370b
LT
166}
167
f950eb95
CB
168/*
169 * Returns a copy of the longest leading path common among all
170 * pathspecs.
171 */
827f4d6c 172char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
173{
174 unsigned long len = common_prefix_len(pathspec);
175
827f4d6c 176 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
177}
178
7327d3d1 179int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
1d8842d9 180{
bec5ab89 181 const char *prefix;
966de302 182 size_t prefix_len;
1d8842d9
LT
183
184 /*
185 * Calculate common prefix for the pathspec, and
186 * use that to optimize the directory walk
187 */
bec5ab89
RS
188 prefix_len = common_prefix_len(pathspec);
189 prefix = prefix_len ? pathspec->items[0].match : "";
1d8842d9
LT
190
191 /* Read the directory and prune it */
966de302
BW
192 read_directory(dir, prefix, prefix_len, pathspec);
193
966de302 194 return prefix_len;
1d8842d9
LT
195}
196
bc96cc87
NTND
197int within_depth(const char *name, int namelen,
198 int depth, int max_depth)
199{
200 const char *cp = name, *cpe = name + namelen;
201
202 while (cp < cpe) {
203 if (*cp++ != '/')
204 continue;
205 depth++;
206 if (depth > max_depth)
207 return 0;
208 }
209 return 1;
210}
211
75a6315f
BW
212#define DO_MATCH_EXCLUDE (1<<0)
213#define DO_MATCH_DIRECTORY (1<<1)
214#define DO_MATCH_SUBMODULE (1<<2)
42b0874a 215
b0db7046
BW
216static int match_attrs(const char *name, int namelen,
217 const struct pathspec_item *item)
218{
219 int i;
220
221 git_check_attr(name, item->attr_check);
222 for (i = 0; i < item->attr_match_nr; i++) {
223 const char *value;
224 int matched;
225 enum attr_match_mode match_mode;
226
227 value = item->attr_check->items[i].value;
228 match_mode = item->attr_match[i].match_mode;
229
230 if (ATTR_TRUE(value))
231 matched = (match_mode == MATCH_SET);
232 else if (ATTR_FALSE(value))
233 matched = (match_mode == MATCH_UNSET);
234 else if (ATTR_UNSET(value))
235 matched = (match_mode == MATCH_UNSPECIFIED);
236 else
237 matched = (match_mode == MATCH_VALUE &&
238 !strcmp(item->attr_match[i].value, value));
239 if (!matched)
240 return 0;
241 }
242
243 return 1;
244}
245
61cf2820
NTND
246/*
247 * Does 'match' match the given name?
248 * A match is found if
249 *
250 * (1) the 'match' string is leading directory of 'name', or
251 * (2) the 'match' string is a wildcard and matches 'name', or
252 * (3) the 'match' string is exactly the same as 'name'.
253 *
254 * and the return value tells which case it was.
255 *
256 * It returns 0 when there is no match.
257 */
258static int match_pathspec_item(const struct pathspec_item *item, int prefix,
42b0874a 259 const char *name, int namelen, unsigned flags)
61cf2820
NTND
260{
261 /* name/namelen has prefix cut off by caller */
262 const char *match = item->match + prefix;
263 int matchlen = item->len - prefix;
264
93d93537
NTND
265 /*
266 * The normal call pattern is:
267 * 1. prefix = common_prefix_len(ps);
268 * 2. prune something, or fill_directory
854b0959 269 * 3. match_pathspec()
93d93537
NTND
270 *
271 * 'prefix' at #1 may be shorter than the command's prefix and
272 * it's ok for #2 to match extra files. Those extras will be
273 * trimmed at #3.
274 *
275 * Suppose the pathspec is 'foo' and '../bar' running from
276 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
277 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
278 * user does not want XYZ/foo, only the "foo" part should be
279 * case-insensitive. We need to filter out XYZ/foo here. In
280 * other words, we do not trust the caller on comparing the
281 * prefix part when :(icase) is involved. We do exact
282 * comparison ourselves.
283 *
284 * Normally the caller (common_prefix_len() in fact) does
285 * _exact_ matching on name[-prefix+1..-1] and we do not need
286 * to check that part. Be defensive and check it anyway, in
287 * case common_prefix_len is changed, or a new caller is
288 * introduced that does not use common_prefix_len.
289 *
290 * If the penalty turns out too high when prefix is really
291 * long, maybe change it to
292 * strncmp(match, name, item->prefix - prefix)
293 */
294 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
295 strncmp(item->match, name - prefix, item->prefix))
296 return 0;
297
b0db7046
BW
298 if (item->attr_match_nr && !match_attrs(name, namelen, item))
299 return 0;
300
61cf2820
NTND
301 /* If the match was just the prefix, we matched */
302 if (!*match)
303 return MATCHED_RECURSIVELY;
304
93d93537 305 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
306 if (matchlen == namelen)
307 return MATCHED_EXACTLY;
308
309 if (match[matchlen-1] == '/' || name[matchlen] == '/')
310 return MATCHED_RECURSIVELY;
68690fdd
NTND
311 } else if ((flags & DO_MATCH_DIRECTORY) &&
312 match[matchlen - 1] == '/' &&
313 namelen == matchlen - 1 &&
314 !ps_strncmp(item, match, name, namelen))
315 return MATCHED_EXACTLY;
61cf2820 316
5d74762d 317 if (item->nowildcard_len < item->len &&
bd30c2e4 318 !git_fnmatch(item, match, name,
8c6abbcd 319 item->nowildcard_len - prefix))
61cf2820
NTND
320 return MATCHED_FNMATCH;
321
75a6315f
BW
322 /* Perform checks to see if "name" is a super set of the pathspec */
323 if (flags & DO_MATCH_SUBMODULE) {
324 /* name is a literal prefix of the pathspec */
325 if ((namelen < matchlen) &&
326 (match[namelen] == '/') &&
327 !ps_strncmp(item, match, name, namelen))
328 return MATCHED_RECURSIVELY;
329
330 /* name" doesn't match up to the first wild character */
331 if (item->nowildcard_len < item->len &&
332 ps_strncmp(item, match, name,
333 item->nowildcard_len - prefix))
334 return 0;
335
336 /*
337 * Here is where we would perform a wildmatch to check if
338 * "name" can be matched as a directory (or a prefix) against
339 * the pathspec. Since wildmatch doesn't have this capability
340 * at the present we have to punt and say that it is a match,
341 * potentially returning a false positive
342 * The submodules themselves will be able to perform more
343 * accurate matching to determine if the pathspec matches.
344 */
345 return MATCHED_RECURSIVELY;
346 }
347
61cf2820
NTND
348 return 0;
349}
350
351/*
52ed1894
AS
352 * Given a name and a list of pathspecs, returns the nature of the
353 * closest (i.e. most specific) match of the name to any of the
354 * pathspecs.
355 *
356 * The caller typically calls this multiple times with the same
357 * pathspec and seen[] array but with different name/namelen
358 * (e.g. entries from the index) and is interested in seeing if and
359 * how each pathspec matches all the names it calls this function
360 * with. A mark is left in the seen[] array for each pathspec element
361 * indicating the closest type of match that element achieved, so if
362 * seen[n] remains zero after multiple invocations, that means the nth
363 * pathspec did not match any names, which could indicate that the
364 * user mistyped the nth pathspec.
61cf2820 365 */
854b0959
NTND
366static int do_match_pathspec(const struct pathspec *ps,
367 const char *name, int namelen,
368 int prefix, char *seen,
42b0874a 369 unsigned flags)
61cf2820 370{
42b0874a 371 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 372
5c6933d2
NTND
373 GUARD_PATHSPEC(ps,
374 PATHSPEC_FROMTOP |
375 PATHSPEC_MAXDEPTH |
bd30c2e4 376 PATHSPEC_LITERAL |
93d93537 377 PATHSPEC_GLOB |
ef79b1f8 378 PATHSPEC_ICASE |
b0db7046
BW
379 PATHSPEC_EXCLUDE |
380 PATHSPEC_ATTR);
8f4f8f45 381
61cf2820 382 if (!ps->nr) {
6330a171
NTND
383 if (!ps->recursive ||
384 !(ps->magic & PATHSPEC_MAXDEPTH) ||
385 ps->max_depth == -1)
61cf2820
NTND
386 return MATCHED_RECURSIVELY;
387
388 if (within_depth(name, namelen, 0, ps->max_depth))
389 return MATCHED_EXACTLY;
390 else
391 return 0;
392 }
393
394 name += prefix;
395 namelen -= prefix;
396
397 for (i = ps->nr - 1; i >= 0; i--) {
398 int how;
ef79b1f8
NTND
399
400 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
401 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
402 continue;
403
61cf2820
NTND
404 if (seen && seen[i] == MATCHED_EXACTLY)
405 continue;
ef79b1f8
NTND
406 /*
407 * Make exclude patterns optional and never report
408 * "pathspec ':(exclude)foo' matches no files"
409 */
410 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
411 seen[i] = MATCHED_FNMATCH;
42b0874a
NTND
412 how = match_pathspec_item(ps->items+i, prefix, name,
413 namelen, flags);
6330a171
NTND
414 if (ps->recursive &&
415 (ps->magic & PATHSPEC_MAXDEPTH) &&
416 ps->max_depth != -1 &&
61cf2820
NTND
417 how && how != MATCHED_FNMATCH) {
418 int len = ps->items[i].len;
419 if (name[len] == '/')
420 len++;
421 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
422 how = MATCHED_EXACTLY;
423 else
424 how = 0;
425 }
426 if (how) {
427 if (retval < how)
428 retval = how;
429 if (seen && seen[i] < how)
430 seen[i] = how;
431 }
432 }
433 return retval;
434}
435
854b0959
NTND
436int match_pathspec(const struct pathspec *ps,
437 const char *name, int namelen,
ae8d0824 438 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
439{
440 int positive, negative;
ae8d0824 441 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
42b0874a
NTND
442 positive = do_match_pathspec(ps, name, namelen,
443 prefix, seen, flags);
ef79b1f8
NTND
444 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
445 return positive;
42b0874a
NTND
446 negative = do_match_pathspec(ps, name, namelen,
447 prefix, seen,
448 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
449 return negative ? 0 : positive;
450}
451
75a6315f
BW
452/**
453 * Check if a submodule is a superset of the pathspec
454 */
455int submodule_path_match(const struct pathspec *ps,
456 const char *submodule_name,
457 char *seen)
458{
459 int matched = do_match_pathspec(ps, submodule_name,
460 strlen(submodule_name),
461 0, seen,
462 DO_MATCH_DIRECTORY |
463 DO_MATCH_SUBMODULE);
464 return matched;
465}
466
777c55a6
JH
467int report_path_error(const char *ps_matched,
468 const struct pathspec *pathspec,
469 const char *prefix)
470{
471 /*
472 * Make sure all pathspec matched; otherwise it is an error.
473 */
777c55a6
JH
474 int num, errors = 0;
475 for (num = 0; num < pathspec->nr; num++) {
476 int other, found_dup;
477
478 if (ps_matched[num])
479 continue;
480 /*
481 * The caller might have fed identical pathspec
482 * twice. Do not barf on such a mistake.
483 * FIXME: parse_pathspec should have eliminated
484 * duplicate pathspec.
485 */
486 for (found_dup = other = 0;
487 !found_dup && other < pathspec->nr;
488 other++) {
489 if (other == num || !ps_matched[other])
490 continue;
491 if (!strcmp(pathspec->items[other].original,
492 pathspec->items[num].original))
493 /*
494 * Ok, we have a match already.
495 */
496 found_dup = 1;
497 }
498 if (found_dup)
499 continue;
500
501 error("pathspec '%s' did not match any file(s) known to git.",
502 pathspec->items[num].original);
503 errors++;
504 }
777c55a6
JH
505 return errors;
506}
507
fcd631ed
NTND
508/*
509 * Return the length of the "simple" part of a path match limiter.
510 */
87323bda 511int simple_length(const char *match)
fcd631ed
NTND
512{
513 int len = -1;
514
515 for (;;) {
516 unsigned char c = *match++;
517 len++;
518 if (c == '\0' || is_glob_special(c))
519 return len;
520 }
521}
522
87323bda 523int no_wildcard(const char *string)
68492fc7 524{
fcd631ed 525 return string[simple_length(string)] == '\0';
68492fc7
LK
526}
527
82dce998
NTND
528void parse_exclude_pattern(const char **pattern,
529 int *patternlen,
f8708998 530 unsigned *flags,
82dce998 531 int *nowildcardlen)
84460eec
NTND
532{
533 const char *p = *pattern;
534 size_t i, len;
535
536 *flags = 0;
537 if (*p == '!') {
538 *flags |= EXC_FLAG_NEGATIVE;
539 p++;
540 }
541 len = strlen(p);
542 if (len && p[len - 1] == '/') {
543 len--;
544 *flags |= EXC_FLAG_MUSTBEDIR;
545 }
546 for (i = 0; i < len; i++) {
547 if (p[i] == '/')
548 break;
549 }
550 if (i == len)
551 *flags |= EXC_FLAG_NODIR;
552 *nowildcardlen = simple_length(p);
553 /*
554 * we should have excluded the trailing slash from 'p' too,
555 * but that's one more allocation. Instead just make sure
556 * nowildcardlen does not exceed real patternlen
557 */
558 if (*nowildcardlen > len)
559 *nowildcardlen = len;
560 if (*p == '*' && no_wildcard(p + 1))
561 *flags |= EXC_FLAG_ENDSWITH;
562 *pattern = p;
563 *patternlen = len;
564}
565
453ec4bd 566void add_exclude(const char *string, const char *base,
c04318e4 567 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 568{
d6b8fc30 569 struct exclude *x;
84460eec 570 int patternlen;
f8708998 571 unsigned flags;
84460eec 572 int nowildcardlen;
453ec4bd 573
84460eec
NTND
574 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
575 if (flags & EXC_FLAG_MUSTBEDIR) {
96ffc06f 576 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
d6b8fc30
JH
577 } else {
578 x = xmalloc(sizeof(*x));
579 x->pattern = string;
580 }
84460eec
NTND
581 x->patternlen = patternlen;
582 x->nowildcardlen = nowildcardlen;
453ec4bd
LT
583 x->base = base;
584 x->baselen = baselen;
d6b8fc30 585 x->flags = flags;
c04318e4 586 x->srcpos = srcpos;
840fc334
AS
587 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
588 el->excludes[el->nr++] = x;
c04318e4 589 x->el = el;
453ec4bd
LT
590}
591
6f52b741
BW
592static void *read_skip_worktree_file_from_index(const struct index_state *istate,
593 const char *path, size_t *size,
55fe6f51 594 struct sha1_stat *sha1_stat)
c28b3d6e
NTND
595{
596 int pos, len;
597 unsigned long sz;
598 enum object_type type;
599 void *data;
c28b3d6e
NTND
600
601 len = strlen(path);
6f52b741 602 pos = index_name_pos(istate, path, len);
c28b3d6e
NTND
603 if (pos < 0)
604 return NULL;
6f52b741 605 if (!ce_skip_worktree(istate->cache[pos]))
c28b3d6e 606 return NULL;
6f52b741 607 data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz);
c28b3d6e
NTND
608 if (!data || type != OBJ_BLOB) {
609 free(data);
610 return NULL;
611 }
612 *size = xsize_t(sz);
55fe6f51
NTND
613 if (sha1_stat) {
614 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
6f52b741 615 hashcpy(sha1_stat->sha1, istate->cache[pos]->oid.hash);
55fe6f51 616 }
c28b3d6e
NTND
617 return data;
618}
619
f6198812
AS
620/*
621 * Frees memory within el which was allocated for exclude patterns and
622 * the file buffer. Does not free el itself.
623 */
624void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
625{
626 int i;
627
5cee3493 628 for (i = 0; i < el->nr; i++)
0fd0e241
NTND
629 free(el->excludes[i]);
630 free(el->excludes);
c082df24 631 free(el->filebuf);
0fd0e241 632
2653a8c6 633 memset(el, 0, sizeof(*el));
0fd0e241
NTND
634}
635
7e2e4b37 636static void trim_trailing_spaces(char *buf)
16402b99 637{
e61a6c1d
PB
638 char *p, *last_space = NULL;
639
640 for (p = buf; *p; p++)
641 switch (*p) {
642 case ' ':
643 if (!last_space)
644 last_space = p;
645 break;
646 case '\\':
647 p++;
648 if (!*p)
649 return;
650 /* fallthrough */
651 default:
652 last_space = NULL;
653 }
654
655 if (last_space)
656 *last_space = '\0';
16402b99
NTND
657}
658
0dcb8d7f
NTND
659/*
660 * Given a subdirectory name and "dir" of the current directory,
661 * search the subdir in "dir" and return it, or create a new one if it
662 * does not exist in "dir".
663 *
664 * If "name" has the trailing slash, it'll be excluded in the search.
665 */
666static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
667 struct untracked_cache_dir *dir,
668 const char *name, int len)
669{
670 int first, last;
671 struct untracked_cache_dir *d;
672 if (!dir)
673 return NULL;
674 if (len && name[len - 1] == '/')
675 len--;
676 first = 0;
677 last = dir->dirs_nr;
678 while (last > first) {
679 int cmp, next = (last + first) >> 1;
680 d = dir->dirs[next];
681 cmp = strncmp(name, d->name, len);
682 if (!cmp && strlen(d->name) > len)
683 cmp = -1;
684 if (!cmp)
685 return d;
686 if (cmp < 0) {
687 last = next;
688 continue;
689 }
690 first = next+1;
691 }
692
693 uc->dir_created++;
96ffc06f 694 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
695
696 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
697 memmove(dir->dirs + first + 1, dir->dirs + first,
698 (dir->dirs_nr - first) * sizeof(*dir->dirs));
699 dir->dirs_nr++;
700 dir->dirs[first] = d;
701 return d;
702}
703
ccad261f
NTND
704static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
705{
706 int i;
707 dir->valid = 0;
708 dir->untracked_nr = 0;
709 for (i = 0; i < dir->dirs_nr; i++)
710 do_invalidate_gitignore(dir->dirs[i]);
711}
712
713static void invalidate_gitignore(struct untracked_cache *uc,
714 struct untracked_cache_dir *dir)
715{
716 uc->gitignore_invalidated++;
717 do_invalidate_gitignore(dir);
718}
719
91a2288b
NTND
720static void invalidate_directory(struct untracked_cache *uc,
721 struct untracked_cache_dir *dir)
722{
26cb0182 723 int i;
91a2288b
NTND
724 uc->dir_invalidated++;
725 dir->valid = 0;
726 dir->untracked_nr = 0;
26cb0182
NTND
727 for (i = 0; i < dir->dirs_nr; i++)
728 dir->dirs[i]->recurse = 0;
91a2288b
NTND
729}
730
55fe6f51
NTND
731/*
732 * Given a file with name "fname", read it (either from disk, or from
473e3930 733 * an index if 'istate' is non-null), parse it and store the
55fe6f51
NTND
734 * exclude rules in "el".
735 *
736 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
737 * stat data from disk (only valid if add_excludes returns zero). If
738 * ss_valid is non-zero, "ss" must contain good value as input.
739 */
740static int add_excludes(const char *fname, const char *base, int baselen,
473e3930
BW
741 struct exclude_list *el,
742 struct index_state *istate,
55fe6f51 743 struct sha1_stat *sha1_stat)
453ec4bd 744{
c470701a 745 struct stat st;
c04318e4 746 int fd, i, lineno = 1;
9d14017a 747 size_t size = 0;
453ec4bd
LT
748 char *buf, *entry;
749
750 fd = open(fname, O_RDONLY);
c28b3d6e 751 if (fd < 0 || fstat(fd, &st) < 0) {
69660731 752 if (errno != ENOENT)
55b38a48 753 warn_on_inaccessible(fname);
c28b3d6e
NTND
754 if (0 <= fd)
755 close(fd);
473e3930
BW
756 if (!istate ||
757 (buf = read_skip_worktree_file_from_index(istate, fname, &size, sha1_stat)) == NULL)
c28b3d6e 758 return -1;
45d76f17
NTND
759 if (size == 0) {
760 free(buf);
761 return 0;
762 }
763 if (buf[size-1] != '\n') {
50a6c8ef 764 buf = xrealloc(buf, st_add(size, 1));
45d76f17
NTND
765 buf[size++] = '\n';
766 }
d961baa8 767 } else {
c28b3d6e
NTND
768 size = xsize_t(st.st_size);
769 if (size == 0) {
55fe6f51
NTND
770 if (sha1_stat) {
771 fill_stat_data(&sha1_stat->stat, &st);
772 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
773 sha1_stat->valid = 1;
774 }
c28b3d6e
NTND
775 close(fd);
776 return 0;
777 }
3733e694 778 buf = xmallocz(size);
c28b3d6e 779 if (read_in_full(fd, buf, size) != size) {
45d76f17 780 free(buf);
c28b3d6e
NTND
781 close(fd);
782 return -1;
783 }
45d76f17 784 buf[size++] = '\n';
c28b3d6e 785 close(fd);
55fe6f51
NTND
786 if (sha1_stat) {
787 int pos;
788 if (sha1_stat->valid &&
473e3930 789 !match_stat_data_racy(istate, &sha1_stat->stat, &st))
55fe6f51 790 ; /* no content change, ss->sha1 still good */
473e3930
BW
791 else if (istate &&
792 (pos = index_name_pos(istate, fname, strlen(fname))) >= 0 &&
793 !ce_stage(istate->cache[pos]) &&
794 ce_uptodate(istate->cache[pos]) &&
55fe6f51 795 !would_convert_to_git(fname))
99d1a986 796 hashcpy(sha1_stat->sha1,
473e3930 797 istate->cache[pos]->oid.hash);
55fe6f51
NTND
798 else
799 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
800 fill_stat_data(&sha1_stat->stat, &st);
801 sha1_stat->valid = 1;
802 }
6ba78238 803 }
453ec4bd 804
c082df24 805 el->filebuf = buf;
245e1c19 806
dde843e7
JH
807 if (skip_utf8_bom(&buf, size))
808 size -= buf - el->filebuf;
809
453ec4bd 810 entry = buf;
245e1c19 811
45d76f17
NTND
812 for (i = 0; i < size; i++) {
813 if (buf[i] == '\n') {
453ec4bd
LT
814 if (entry != buf + i && entry[0] != '#') {
815 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 816 trim_trailing_spaces(entry);
c04318e4 817 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 818 }
c04318e4 819 lineno++;
453ec4bd
LT
820 entry = buf + i + 1;
821 }
822 }
823 return 0;
453ec4bd
LT
824}
825
55fe6f51
NTND
826int add_excludes_from_file_to_list(const char *fname, const char *base,
827 int baselen, struct exclude_list *el,
473e3930 828 struct index_state *istate)
55fe6f51 829{
473e3930 830 return add_excludes(fname, base, baselen, el, istate, NULL);
55fe6f51
NTND
831}
832
c04318e4
AS
833struct exclude_list *add_exclude_list(struct dir_struct *dir,
834 int group_type, const char *src)
c082df24
AS
835{
836 struct exclude_list *el;
837 struct exclude_list_group *group;
838
839 group = &dir->exclude_list_group[group_type];
840 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
841 el = &group->el[group->nr++];
842 memset(el, 0, sizeof(*el));
c04318e4 843 el->src = src;
c082df24
AS
844 return el;
845}
846
847/*
848 * Used to set up core.excludesfile and .git/info/exclude lists.
849 */
0dcb8d7f
NTND
850static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
851 struct sha1_stat *sha1_stat)
453ec4bd 852{
c082df24 853 struct exclude_list *el;
ccad261f
NTND
854 /*
855 * catch setup_standard_excludes() that's called before
856 * dir->untracked is assigned. That function behaves
857 * differently when dir->untracked is non-NULL.
858 */
859 if (!dir->untracked)
860 dir->unmanaged_exclude_files++;
c04318e4 861 el = add_exclude_list(dir, EXC_FILE, fname);
473e3930 862 if (add_excludes(fname, "", 0, el, NULL, sha1_stat) < 0)
453ec4bd
LT
863 die("cannot use %s as an exclude file", fname);
864}
865
0dcb8d7f
NTND
866void add_excludes_from_file(struct dir_struct *dir, const char *fname)
867{
ccad261f 868 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
869 add_excludes_from_file_1(dir, fname, NULL);
870}
871
82dce998
NTND
872int match_basename(const char *basename, int basenamelen,
873 const char *pattern, int prefix, int patternlen,
f8708998 874 unsigned flags)
593cb880
NTND
875{
876 if (prefix == patternlen) {
0b6e56df 877 if (patternlen == basenamelen &&
ba0897e6 878 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
879 return 1;
880 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 881 /* "*literal" matching against "fooliteral" */
593cb880 882 if (patternlen - 1 <= basenamelen &&
ba0897e6 883 !fspathncmp(pattern + 1,
0b6e56df
JH
884 basename + basenamelen - (patternlen - 1),
885 patternlen - 1))
593cb880
NTND
886 return 1;
887 } else {
0b6e56df
JH
888 if (fnmatch_icase_mem(pattern, patternlen,
889 basename, basenamelen,
890 0) == 0)
593cb880
NTND
891 return 1;
892 }
893 return 0;
894}
895
82dce998
NTND
896int match_pathname(const char *pathname, int pathlen,
897 const char *base, int baselen,
898 const char *pattern, int prefix, int patternlen,
f8708998 899 unsigned flags)
b5592632
NTND
900{
901 const char *name;
902 int namelen;
903
904 /*
905 * match with FNM_PATHNAME; the pattern has base implicitly
906 * in front of it.
907 */
908 if (*pattern == '/') {
909 pattern++;
982ac873 910 patternlen--;
b5592632
NTND
911 prefix--;
912 }
913
914 /*
915 * baselen does not count the trailing slash. base[] may or
916 * may not end with a trailing slash though.
917 */
918 if (pathlen < baselen + 1 ||
919 (baselen && pathname[baselen] != '/') ||
ba0897e6 920 fspathncmp(pathname, base, baselen))
b5592632
NTND
921 return 0;
922
923 namelen = baselen ? pathlen - baselen - 1 : pathlen;
924 name = pathname + pathlen - namelen;
925
926 if (prefix) {
927 /*
928 * if the non-wildcard part is longer than the
929 * remaining pathname, surely it cannot match.
930 */
931 if (prefix > namelen)
932 return 0;
933
ba0897e6 934 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
935 return 0;
936 pattern += prefix;
ab3aebc1 937 patternlen -= prefix;
b5592632
NTND
938 name += prefix;
939 namelen -= prefix;
ab3aebc1
JK
940
941 /*
942 * If the whole pattern did not have a wildcard,
943 * then our prefix match is all we need; we
944 * do not need to call fnmatch at all.
945 */
5cee3493 946 if (!patternlen && !namelen)
ab3aebc1 947 return 1;
b5592632
NTND
948 }
949
ab3aebc1
JK
950 return fnmatch_icase_mem(pattern, patternlen,
951 name, namelen,
f30366b2 952 WM_PATHNAME) == 0;
b5592632
NTND
953}
954
578cd7c3
AS
955/*
956 * Scan the given exclude list in reverse to see whether pathname
957 * should be ignored. The first match (i.e. the last on the list), if
958 * any, determines the fate. Returns the exclude_list element which
959 * matched, or NULL for undecided.
453ec4bd 960 */
578cd7c3
AS
961static struct exclude *last_exclude_matching_from_list(const char *pathname,
962 int pathlen,
963 const char *basename,
964 int *dtype,
2b70e88d
BW
965 struct exclude_list *el,
966 struct index_state *istate)
453ec4bd 967{
e6efecc4 968 struct exclude *exc = NULL; /* undecided */
5cee3493 969 int i;
453ec4bd 970
35a94d44 971 if (!el->nr)
578cd7c3 972 return NULL; /* undefined */
d6b8fc30 973
35a94d44
NTND
974 for (i = el->nr - 1; 0 <= i; i--) {
975 struct exclude *x = el->excludes[i];
b5592632 976 const char *exclude = x->pattern;
b5592632 977 int prefix = x->nowildcardlen;
35a94d44
NTND
978
979 if (x->flags & EXC_FLAG_MUSTBEDIR) {
980 if (*dtype == DT_UNKNOWN)
2b70e88d 981 *dtype = get_dtype(NULL, istate, pathname, pathlen);
35a94d44
NTND
982 if (*dtype != DT_DIR)
983 continue;
984 }
d6b8fc30 985
35a94d44 986 if (x->flags & EXC_FLAG_NODIR) {
593cb880
NTND
987 if (match_basename(basename,
988 pathlen - (basename - pathname),
989 exclude, prefix, x->patternlen,
e6efecc4
NTND
990 x->flags)) {
991 exc = x;
992 break;
993 }
35a94d44
NTND
994 continue;
995 }
996
b5592632
NTND
997 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
998 if (match_pathname(pathname, pathlen,
999 x->base, x->baselen ? x->baselen - 1 : 0,
e6efecc4
NTND
1000 exclude, prefix, x->patternlen, x->flags)) {
1001 exc = x;
1002 break;
1003 }
453ec4bd 1004 }
e6efecc4 1005 return exc;
578cd7c3
AS
1006}
1007
1008/*
1009 * Scan the list and let the last match determine the fate.
1010 * Return 1 for exclude, 0 for include and -1 for undecided.
1011 */
1012int is_excluded_from_list(const char *pathname,
1013 int pathlen, const char *basename, int *dtype,
fba92be8 1014 struct exclude_list *el, struct index_state *istate)
578cd7c3
AS
1015{
1016 struct exclude *exclude;
fba92be8
BW
1017 exclude = last_exclude_matching_from_list(pathname, pathlen, basename,
1018 dtype, el, istate);
578cd7c3
AS
1019 if (exclude)
1020 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1021 return -1; /* undecided */
1022}
1023
46aa2f95 1024static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
2b70e88d 1025 struct index_state *istate,
46aa2f95
KB
1026 const char *pathname, int pathlen, const char *basename,
1027 int *dtype_p)
1028{
1029 int i, j;
1030 struct exclude_list_group *group;
1031 struct exclude *exclude;
1032 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
1033 group = &dir->exclude_list_group[i];
1034 for (j = group->nr - 1; j >= 0; j--) {
1035 exclude = last_exclude_matching_from_list(
1036 pathname, pathlen, basename, dtype_p,
2b70e88d 1037 &group->el[j], istate);
46aa2f95
KB
1038 if (exclude)
1039 return exclude;
1040 }
1041 }
1042 return NULL;
1043}
1044
6cd5c582
KB
1045/*
1046 * Loads the per-directory exclude list for the substring of base
1047 * which has a char length of baselen.
1048 */
e799ed40
BW
1049static void prep_exclude(struct dir_struct *dir,
1050 struct index_state *istate,
1051 const char *base, int baselen)
6cd5c582
KB
1052{
1053 struct exclude_list_group *group;
1054 struct exclude_list *el;
1055 struct exclude_stack *stk = NULL;
0dcb8d7f 1056 struct untracked_cache_dir *untracked;
6cd5c582
KB
1057 int current;
1058
6cd5c582
KB
1059 group = &dir->exclude_list_group[EXC_DIRS];
1060
d961baa8
NTND
1061 /*
1062 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 1063 * which originate from directories not in the prefix of the
d961baa8
NTND
1064 * path being checked.
1065 */
6cd5c582
KB
1066 while ((stk = dir->exclude_stack) != NULL) {
1067 if (stk->baselen <= baselen &&
aceb9429 1068 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
1069 break;
1070 el = &group->el[dir->exclude_stack->exclude_ix];
1071 dir->exclude_stack = stk->prev;
95c6f271 1072 dir->exclude = NULL;
aceb9429 1073 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
1074 clear_exclude_list(el);
1075 free(stk);
1076 group->nr--;
1077 }
1078
95c6f271
KB
1079 /* Skip traversing into sub directories if the parent is excluded */
1080 if (dir->exclude)
1081 return;
1082
aceb9429
NTND
1083 /*
1084 * Lazy initialization. All call sites currently just
1085 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1086 * them seems lots of work for little benefit.
1087 */
1088 if (!dir->basebuf.buf)
1089 strbuf_init(&dir->basebuf, PATH_MAX);
1090
6cd5c582
KB
1091 /* Read from the parent directories and push them down. */
1092 current = stk ? stk->baselen : -1;
aceb9429 1093 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1094 if (dir->untracked)
1095 untracked = stk ? stk->ucd : dir->untracked->root;
1096 else
1097 untracked = NULL;
1098
6cd5c582 1099 while (current < baselen) {
6cd5c582 1100 const char *cp;
0dcb8d7f 1101 struct sha1_stat sha1_stat;
6cd5c582 1102
03e11a71 1103 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1104 if (current < 0) {
1105 cp = base;
1106 current = 0;
d961baa8 1107 } else {
6cd5c582
KB
1108 cp = strchr(base + current + 1, '/');
1109 if (!cp)
1110 die("oops in prep_exclude");
1111 cp++;
0dcb8d7f
NTND
1112 untracked =
1113 lookup_untracked(dir->untracked, untracked,
1114 base + current,
1115 cp - base - current);
6cd5c582
KB
1116 }
1117 stk->prev = dir->exclude_stack;
1118 stk->baselen = cp - base;
95c6f271 1119 stk->exclude_ix = group->nr;
0dcb8d7f 1120 stk->ucd = untracked;
95c6f271 1121 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1122 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1123 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1124
1125 /* Abort if the directory is excluded */
1126 if (stk->baselen) {
1127 int dt = DT_DIR;
aceb9429 1128 dir->basebuf.buf[stk->baselen - 1] = 0;
95c6f271 1129 dir->exclude = last_exclude_matching_from_lists(dir,
e799ed40 1130 istate,
aceb9429
NTND
1131 dir->basebuf.buf, stk->baselen - 1,
1132 dir->basebuf.buf + current, &dt);
1133 dir->basebuf.buf[stk->baselen - 1] = '/';
c3c327de
KB
1134 if (dir->exclude &&
1135 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1136 dir->exclude = NULL;
95c6f271 1137 if (dir->exclude) {
95c6f271
KB
1138 dir->exclude_stack = stk;
1139 return;
1140 }
1141 }
1142
aceb9429 1143 /* Try to read per-directory file */
0dcb8d7f
NTND
1144 hashclr(sha1_stat.sha1);
1145 sha1_stat.valid = 0;
27b099ae
NTND
1146 if (dir->exclude_per_dir &&
1147 /*
1148 * If we know that no files have been added in
1149 * this directory (i.e. valid_cached_dir() has
1150 * been executed and set untracked->valid) ..
1151 */
1152 (!untracked || !untracked->valid ||
1153 /*
1154 * .. and .gitignore does not exist before
7687252f
DT
1155 * (i.e. null exclude_sha1). Then we can skip
1156 * loading .gitignore, which would result in
1157 * ENOENT anyway.
27b099ae
NTND
1158 */
1159 !is_null_sha1(untracked->exclude_sha1))) {
95c6f271
KB
1160 /*
1161 * dir->basebuf gets reused by the traversal, but we
1162 * need fname to remain unchanged to ensure the src
1163 * member of each struct exclude correctly
1164 * back-references its source file. Other invocations
1165 * of add_exclude_list provide stable strings, so we
aceb9429 1166 * strbuf_detach() and free() here in the caller.
95c6f271 1167 */
aceb9429
NTND
1168 struct strbuf sb = STRBUF_INIT;
1169 strbuf_addbuf(&sb, &dir->basebuf);
1170 strbuf_addstr(&sb, dir->exclude_per_dir);
1171 el->src = strbuf_detach(&sb, NULL);
e799ed40 1172 add_excludes(el->src, el->src, stk->baselen, el, istate,
0dcb8d7f
NTND
1173 untracked ? &sha1_stat : NULL);
1174 }
5ebf79ad
NTND
1175 /*
1176 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1177 * will first be called in valid_cached_dir() then maybe many
1178 * times more in last_exclude_matching(). When the cache is
1179 * used, last_exclude_matching() will not be called and
1180 * reading .gitignore content will be a waste.
1181 *
1182 * So when it's called by valid_cached_dir() and we can get
1183 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1184 * modified on work tree), we could delay reading the
1185 * .gitignore content until we absolutely need it in
1186 * last_exclude_matching(). Be careful about ignore rule
1187 * order, though, if you do that.
1188 */
1189 if (untracked &&
1190 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1191 invalidate_gitignore(dir->untracked, untracked);
0dcb8d7f 1192 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
95c6f271 1193 }
6cd5c582
KB
1194 dir->exclude_stack = stk;
1195 current = stk->baselen;
1196 }
aceb9429 1197 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1198}
1199
f4cd69a6
AS
1200/*
1201 * Loads the exclude lists for the directory containing pathname, then
1202 * scans all exclude lists to determine whether pathname is excluded.
1203 * Returns the exclude_list element which matched, or NULL for
1204 * undecided.
1205 */
b07bc8c8 1206struct exclude *last_exclude_matching(struct dir_struct *dir,
a0bba65b
BW
1207 struct index_state *istate,
1208 const char *pathname,
1209 int *dtype_p)
453ec4bd
LT
1210{
1211 int pathlen = strlen(pathname);
68492fc7
LK
1212 const char *basename = strrchr(pathname, '/');
1213 basename = (basename) ? basename+1 : pathname;
453ec4bd 1214
a0bba65b 1215 prep_exclude(dir, istate, pathname, basename-pathname);
c082df24 1216
95c6f271
KB
1217 if (dir->exclude)
1218 return dir->exclude;
1219
a0bba65b 1220 return last_exclude_matching_from_lists(dir, istate, pathname, pathlen,
46aa2f95 1221 basename, dtype_p);
f4cd69a6
AS
1222}
1223
1224/*
1225 * Loads the exclude lists for the directory containing pathname, then
1226 * scans all exclude lists to determine whether pathname is excluded.
1227 * Returns 1 if true, otherwise 0.
1228 */
a0bba65b
BW
1229int is_excluded(struct dir_struct *dir, struct index_state *istate,
1230 const char *pathname, int *dtype_p)
f4cd69a6
AS
1231{
1232 struct exclude *exclude =
a0bba65b 1233 last_exclude_matching(dir, istate, pathname, dtype_p);
f4cd69a6
AS
1234 if (exclude)
1235 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1236 return 0;
1237}
1238
f3fa1838
JH
1239static struct dir_entry *dir_entry_new(const char *pathname, int len)
1240{
453ec4bd
LT
1241 struct dir_entry *ent;
1242
96ffc06f 1243 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1244 ent->len = len;
4d06f8ac 1245 return ent;
453ec4bd
LT
1246}
1247
9e58beca
BW
1248static struct dir_entry *dir_add_name(struct dir_struct *dir,
1249 struct index_state *istate,
1250 const char *pathname, int len)
6815e569 1251{
9e58beca 1252 if (index_file_exists(istate, pathname, len, ignore_case))
6815e569
JK
1253 return NULL;
1254
25fd2f7a 1255 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1256 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1257}
1258
9e58beca
BW
1259struct dir_entry *dir_add_ignored(struct dir_struct *dir,
1260 struct index_state *istate,
1261 const char *pathname, int len)
2abd31b0 1262{
9e58beca 1263 if (!index_name_is_other(istate, pathname, len))
2abd31b0
JK
1264 return NULL;
1265
25fd2f7a 1266 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1267 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1268}
1269
09595258
LT
1270enum exist_status {
1271 index_nonexistent = 0,
1272 index_directory,
4b05548f 1273 index_gitdir
09595258
LT
1274};
1275
5102c617 1276/*
71261027 1277 * Do not use the alphabetically sorted index to look up
5102c617 1278 * the directory name; instead, use the case insensitive
ebbd7439 1279 * directory hash.
5102c617 1280 */
ae520e36
BW
1281static enum exist_status directory_exists_in_index_icase(struct index_state *istate,
1282 const char *dirname, int len)
5102c617 1283{
41284eb0 1284 struct cache_entry *ce;
5102c617 1285
ae520e36 1286 if (index_dir_exists(istate, dirname, len))
5102c617
JJ
1287 return index_directory;
1288
ae520e36 1289 ce = index_file_exists(istate, dirname, len, ignore_case);
41284eb0 1290 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1291 return index_gitdir;
1292
5102c617
JJ
1293 return index_nonexistent;
1294}
1295
09595258
LT
1296/*
1297 * The index sorts alphabetically by entry name, which
1298 * means that a gitlink sorts as '\0' at the end, while
1299 * a directory (which is defined not as an entry, but as
1300 * the files it contains) will sort with the '/' at the
1301 * end.
1302 */
ae520e36
BW
1303static enum exist_status directory_exists_in_index(struct index_state *istate,
1304 const char *dirname, int len)
453ec4bd 1305{
5102c617
JJ
1306 int pos;
1307
1308 if (ignore_case)
ae520e36 1309 return directory_exists_in_index_icase(istate, dirname, len);
5102c617 1310
ae520e36 1311 pos = index_name_pos(istate, dirname, len);
09595258
LT
1312 if (pos < 0)
1313 pos = -pos-1;
ae520e36
BW
1314 while (pos < istate->cache_nr) {
1315 const struct cache_entry *ce = istate->cache[pos++];
09595258
LT
1316 unsigned char endchar;
1317
1318 if (strncmp(ce->name, dirname, len))
1319 break;
1320 endchar = ce->name[len];
1321 if (endchar > '/')
1322 break;
1323 if (endchar == '/')
1324 return index_directory;
7a51ed66 1325 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1326 return index_gitdir;
1327 }
1328 return index_nonexistent;
1329}
1330
1331/*
1332 * When we find a directory when traversing the filesystem, we
1333 * have three distinct cases:
1334 *
1335 * - ignore it
1336 * - see it as a directory
1337 * - recurse into it
1338 *
1339 * and which one we choose depends on a combination of existing
1340 * git index contents and the flags passed into the directory
1341 * traversal routine.
1342 *
1343 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1344 * directory name, we always recurse into the directory to see
1345 * all the files.
09595258
LT
1346 *
1347 * Case 2: If we *already* have that directory name as a gitlink,
1348 * we always continue to see it as a gitlink, regardless of whether
1349 * there is an actual git directory there or not (it might not
1350 * be checked out as a subproject!)
1351 *
1352 * Case 3: if we didn't have it in the index previously, we
1353 * have a few sub-cases:
1354 *
1355 * (a) if "show_other_directories" is true, we show it as
1356 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1357 * also true, in which case we need to check if it contains any
1358 * untracked and / or ignored files.
09595258 1359 * (b) if it looks like a git directory, and we don't have
302b9282 1360 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1361 * as a directory.
1362 * (c) otherwise, we recurse into it.
1363 */
defd7c7b 1364static enum path_treatment treat_directory(struct dir_struct *dir,
0dcb8d7f 1365 struct untracked_cache_dir *untracked,
2e5910f2 1366 const char *dirname, int len, int baselen, int exclude,
e1b8c7bd 1367 const struct pathspec *pathspec)
09595258
LT
1368{
1369 /* The "len-1" is to strip the final '/' */
ae520e36 1370 switch (directory_exists_in_index(&the_index, dirname, len-1)) {
09595258 1371 case index_directory:
defd7c7b 1372 return path_recurse;
09595258
LT
1373
1374 case index_gitdir:
26c986e1 1375 return path_none;
09595258
LT
1376
1377 case index_nonexistent:
7c4c97c0 1378 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1379 break;
7c4c97c0 1380 if (!(dir->flags & DIR_NO_GITLINKS)) {
09595258
LT
1381 unsigned char sha1[20];
1382 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
defd7c7b 1383 return path_untracked;
09595258 1384 }
defd7c7b 1385 return path_recurse;
09595258
LT
1386 }
1387
1388 /* This is the "show_other_directories" case */
721ac4ed 1389
184d2a8e 1390 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1391 return exclude ? path_excluded : path_untracked;
1392
2e5910f2
DT
1393 untracked = lookup_untracked(dir->untracked, untracked,
1394 dirname + baselen, len - baselen);
0dcb8d7f 1395 return read_directory_recursive(dir, dirname, len,
e1b8c7bd 1396 untracked, 1, pathspec);
453ec4bd
LT
1397}
1398
9fc42d60
LT
1399/*
1400 * This is an inexact early pruning of any recursive directory
1401 * reading - if the path cannot possibly be in the pathspec,
1402 * return true, and we'll skip it early.
1403 */
e1b8c7bd
BW
1404static int simplify_away(const char *path, int pathlen,
1405 const struct pathspec *pathspec)
9fc42d60 1406{
e1b8c7bd 1407 int i;
9fc42d60 1408
e1b8c7bd
BW
1409 if (!pathspec || !pathspec->nr)
1410 return 0;
1411
1412 GUARD_PATHSPEC(pathspec,
1413 PATHSPEC_FROMTOP |
1414 PATHSPEC_MAXDEPTH |
1415 PATHSPEC_LITERAL |
1416 PATHSPEC_GLOB |
1417 PATHSPEC_ICASE |
b0db7046
BW
1418 PATHSPEC_EXCLUDE |
1419 PATHSPEC_ATTR);
e1b8c7bd
BW
1420
1421 for (i = 0; i < pathspec->nr; i++) {
1422 const struct pathspec_item *item = &pathspec->items[i];
1423 int len = item->nowildcard_len;
1424
1425 if (len > pathlen)
1426 len = pathlen;
1427 if (!ps_strncmp(item, item->match, path, len))
1428 return 0;
9fc42d60 1429 }
e1b8c7bd
BW
1430
1431 return 1;
9fc42d60
LT
1432}
1433
29209cbe
JK
1434/*
1435 * This function tells us whether an excluded path matches a
1436 * list of "interesting" pathspecs. That is, whether a path matched
1437 * by any of the pathspecs could possibly be ignored by excluding
1438 * the specified path. This can happen if:
1439 *
1440 * 1. the path is mentioned explicitly in the pathspec
1441 *
1442 * 2. the path is a directory prefix of some element in the
1443 * pathspec
1444 */
e1b8c7bd
BW
1445static int exclude_matches_pathspec(const char *path, int pathlen,
1446 const struct pathspec *pathspec)
1447{
1448 int i;
1449
1450 if (!pathspec || !pathspec->nr)
1451 return 0;
1452
1453 GUARD_PATHSPEC(pathspec,
1454 PATHSPEC_FROMTOP |
1455 PATHSPEC_MAXDEPTH |
1456 PATHSPEC_LITERAL |
1457 PATHSPEC_GLOB |
1458 PATHSPEC_ICASE |
1459 PATHSPEC_EXCLUDE);
1460
1461 for (i = 0; i < pathspec->nr; i++) {
1462 const struct pathspec_item *item = &pathspec->items[i];
1463 int len = item->nowildcard_len;
1464
1465 if (len == pathlen &&
1466 !ps_strncmp(item, item->match, path, pathlen))
1467 return 1;
1468 if (len > pathlen &&
1469 item->match[pathlen] == '/' &&
1470 !ps_strncmp(item, item->match, path, pathlen))
1471 return 1;
e96980ef
JK
1472 }
1473 return 0;
1474}
1475
98f2a687
BW
1476static int get_index_dtype(struct index_state *istate,
1477 const char *path, int len)
443e061a
LT
1478{
1479 int pos;
9c5e6c80 1480 const struct cache_entry *ce;
443e061a 1481
98f2a687 1482 ce = index_file_exists(istate, path, len, 0);
443e061a
LT
1483 if (ce) {
1484 if (!ce_uptodate(ce))
1485 return DT_UNKNOWN;
1486 if (S_ISGITLINK(ce->ce_mode))
1487 return DT_DIR;
1488 /*
1489 * Nobody actually cares about the
1490 * difference between DT_LNK and DT_REG
1491 */
1492 return DT_REG;
1493 }
1494
1495 /* Try to look it up as a directory */
98f2a687 1496 pos = index_name_pos(istate, path, len);
443e061a
LT
1497 if (pos >= 0)
1498 return DT_UNKNOWN;
1499 pos = -pos-1;
98f2a687
BW
1500 while (pos < istate->cache_nr) {
1501 ce = istate->cache[pos++];
443e061a
LT
1502 if (strncmp(ce->name, path, len))
1503 break;
1504 if (ce->name[len] > '/')
1505 break;
1506 if (ce->name[len] < '/')
1507 continue;
1508 if (!ce_uptodate(ce))
1509 break; /* continue? */
1510 return DT_DIR;
1511 }
1512 return DT_UNKNOWN;
1513}
1514
98f2a687
BW
1515static int get_dtype(struct dirent *de, struct index_state *istate,
1516 const char *path, int len)
07134421 1517{
6831a88a 1518 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1519 struct stat st;
1520
1521 if (dtype != DT_UNKNOWN)
1522 return dtype;
98f2a687 1523 dtype = get_index_dtype(istate, path, len);
443e061a
LT
1524 if (dtype != DT_UNKNOWN)
1525 return dtype;
1526 if (lstat(path, &st))
07134421
LT
1527 return dtype;
1528 if (S_ISREG(st.st_mode))
1529 return DT_REG;
1530 if (S_ISDIR(st.st_mode))
1531 return DT_DIR;
1532 if (S_ISLNK(st.st_mode))
1533 return DT_LNK;
1534 return dtype;
1535}
1536
16e2cfa9 1537static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1538 struct untracked_cache_dir *untracked,
49dc2cc2 1539 struct strbuf *path,
2e5910f2 1540 int baselen,
e1b8c7bd 1541 const struct pathspec *pathspec,
16e2cfa9 1542 int dtype, struct dirent *de)
53cc5356 1543{
8aaf8d77 1544 int exclude;
12cd0bf9 1545 int has_path_in_index = !!index_file_exists(&the_index, path->buf, path->len, ignore_case);
2eac2a4c 1546
8aaf8d77 1547 if (dtype == DT_UNKNOWN)
98f2a687 1548 dtype = get_dtype(de, &the_index, path->buf, path->len);
8aaf8d77
KB
1549
1550 /* Always exclude indexed files */
2eac2a4c 1551 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1552 return path_none;
8aaf8d77 1553
2eac2a4c
JH
1554 /*
1555 * When we are looking at a directory P in the working tree,
1556 * there are three cases:
1557 *
1558 * (1) P exists in the index. Everything inside the directory P in
1559 * the working tree needs to go when P is checked out from the
1560 * index.
1561 *
1562 * (2) P does not exist in the index, but there is P/Q in the index.
1563 * We know P will stay a directory when we check out the contents
1564 * of the index, but we do not know yet if there is a directory
1565 * P/Q in the working tree to be killed, so we need to recurse.
1566 *
1567 * (3) P does not exist in the index, and there is no P/Q in the index
1568 * to require P to be a directory, either. Only in this case, we
1569 * know that everything inside P will not be killed without
1570 * recursing.
1571 */
1572 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1573 (dtype == DT_DIR) &&
de372b1b 1574 !has_path_in_index &&
ae520e36 1575 (directory_exists_in_index(&the_index, path->buf, path->len) == index_nonexistent))
de372b1b 1576 return path_none;
8aaf8d77 1577
a0bba65b 1578 exclude = is_excluded(dir, &the_index, path->buf, &dtype);
53cc5356
JH
1579
1580 /*
1581 * Excluded? If we don't explicitly want to show
1582 * ignored files, ignore it
1583 */
0aaf62b6 1584 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1585 return path_excluded;
53cc5356 1586
53cc5356
JH
1587 switch (dtype) {
1588 default:
defd7c7b 1589 return path_none;
53cc5356 1590 case DT_DIR:
49dc2cc2 1591 strbuf_addch(path, '/');
2e5910f2 1592 return treat_directory(dir, untracked, path->buf, path->len,
e1b8c7bd 1593 baselen, exclude, pathspec);
53cc5356
JH
1594 case DT_REG:
1595 case DT_LNK:
defd7c7b 1596 return exclude ? path_excluded : path_untracked;
53cc5356 1597 }
53cc5356
JH
1598}
1599
91a2288b
NTND
1600static enum path_treatment treat_path_fast(struct dir_struct *dir,
1601 struct untracked_cache_dir *untracked,
1602 struct cached_dir *cdir,
1603 struct strbuf *path,
1604 int baselen,
e1b8c7bd 1605 const struct pathspec *pathspec)
91a2288b
NTND
1606{
1607 strbuf_setlen(path, baselen);
1608 if (!cdir->ucd) {
1609 strbuf_addstr(path, cdir->file);
1610 return path_untracked;
1611 }
1612 strbuf_addstr(path, cdir->ucd->name);
1613 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1614 strbuf_complete(path, '/');
91a2288b
NTND
1615 if (cdir->ucd->check_only)
1616 /*
1617 * check_only is set as a result of treat_directory() getting
1618 * to its bottom. Verify again the same set of directories
1619 * with check_only set.
1620 */
1621 return read_directory_recursive(dir, path->buf, path->len,
e1b8c7bd 1622 cdir->ucd, 1, pathspec);
91a2288b
NTND
1623 /*
1624 * We get path_recurse in the first run when
1625 * directory_exists_in_index() returns index_nonexistent. We
1626 * are sure that new changes in the index does not impact the
1627 * outcome. Return now.
1628 */
1629 return path_recurse;
1630}
1631
16e2cfa9 1632static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1633 struct untracked_cache_dir *untracked,
cf7c6148 1634 struct cached_dir *cdir,
49dc2cc2 1635 struct strbuf *path,
16e2cfa9 1636 int baselen,
e1b8c7bd 1637 const struct pathspec *pathspec)
16e2cfa9
JH
1638{
1639 int dtype;
cf7c6148 1640 struct dirent *de = cdir->de;
16e2cfa9 1641
91a2288b
NTND
1642 if (!de)
1643 return treat_path_fast(dir, untracked, cdir, path,
e1b8c7bd 1644 baselen, pathspec);
16e2cfa9 1645 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
defd7c7b 1646 return path_none;
49dc2cc2
RS
1647 strbuf_setlen(path, baselen);
1648 strbuf_addstr(path, de->d_name);
e1b8c7bd 1649 if (simplify_away(path->buf, path->len, pathspec))
defd7c7b 1650 return path_none;
16e2cfa9
JH
1651
1652 dtype = DTYPE(de);
e1b8c7bd 1653 return treat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);
0dcb8d7f
NTND
1654}
1655
1656static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1657{
1658 if (!dir)
1659 return;
1660 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1661 dir->untracked_alloc);
1662 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1663}
1664
91a2288b
NTND
1665static int valid_cached_dir(struct dir_struct *dir,
1666 struct untracked_cache_dir *untracked,
207a06ce 1667 struct index_state *istate,
91a2288b
NTND
1668 struct strbuf *path,
1669 int check_only)
1670{
1671 struct stat st;
1672
1673 if (!untracked)
1674 return 0;
1675
1676 if (stat(path->len ? path->buf : ".", &st)) {
1677 invalidate_directory(dir->untracked, untracked);
1678 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1679 return 0;
1680 }
1681 if (!untracked->valid ||
207a06ce 1682 match_stat_data_racy(istate, &untracked->stat_data, &st)) {
91a2288b
NTND
1683 if (untracked->valid)
1684 invalidate_directory(dir->untracked, untracked);
1685 fill_stat_data(&untracked->stat_data, &st);
1686 return 0;
1687 }
1688
1689 if (untracked->check_only != !!check_only) {
1690 invalidate_directory(dir->untracked, untracked);
1691 return 0;
1692 }
1693
1694 /*
1695 * prep_exclude will be called eventually on this directory,
1696 * but it's called much later in last_exclude_matching(). We
1697 * need it now to determine the validity of the cache for this
1698 * path. The next calls will be nearly no-op, the way
1699 * prep_exclude() is designed.
1700 */
1701 if (path->len && path->buf[path->len - 1] != '/') {
1702 strbuf_addch(path, '/');
207a06ce 1703 prep_exclude(dir, istate, path->buf, path->len);
91a2288b
NTND
1704 strbuf_setlen(path, path->len - 1);
1705 } else
207a06ce 1706 prep_exclude(dir, istate, path->buf, path->len);
91a2288b
NTND
1707
1708 /* hopefully prep_exclude() haven't invalidated this entry... */
1709 return untracked->valid;
1710}
1711
cf7c6148
NTND
1712static int open_cached_dir(struct cached_dir *cdir,
1713 struct dir_struct *dir,
1714 struct untracked_cache_dir *untracked,
207a06ce 1715 struct index_state *istate,
cf7c6148
NTND
1716 struct strbuf *path,
1717 int check_only)
1718{
1719 memset(cdir, 0, sizeof(*cdir));
1720 cdir->untracked = untracked;
207a06ce 1721 if (valid_cached_dir(dir, untracked, istate, path, check_only))
91a2288b 1722 return 0;
cf7c6148 1723 cdir->fdir = opendir(path->len ? path->buf : ".");
91a2288b
NTND
1724 if (dir->untracked)
1725 dir->untracked->dir_opened++;
cf7c6148
NTND
1726 if (!cdir->fdir)
1727 return -1;
1728 return 0;
1729}
1730
1731static int read_cached_dir(struct cached_dir *cdir)
1732{
1733 if (cdir->fdir) {
1734 cdir->de = readdir(cdir->fdir);
1735 if (!cdir->de)
1736 return -1;
1737 return 0;
1738 }
91a2288b
NTND
1739 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1740 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1741 if (!d->recurse) {
1742 cdir->nr_dirs++;
1743 continue;
1744 }
91a2288b
NTND
1745 cdir->ucd = d;
1746 cdir->nr_dirs++;
1747 return 0;
1748 }
1749 cdir->ucd = NULL;
1750 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1751 struct untracked_cache_dir *d = cdir->untracked;
1752 cdir->file = d->untracked[cdir->nr_files++];
1753 return 0;
1754 }
cf7c6148
NTND
1755 return -1;
1756}
1757
1758static void close_cached_dir(struct cached_dir *cdir)
1759{
1760 if (cdir->fdir)
1761 closedir(cdir->fdir);
91a2288b
NTND
1762 /*
1763 * We have gone through this directory and found no untracked
1764 * entries. Mark it valid.
1765 */
26cb0182 1766 if (cdir->untracked) {
91a2288b 1767 cdir->untracked->valid = 1;
26cb0182
NTND
1768 cdir->untracked->recurse = 1;
1769 }
16e2cfa9
JH
1770}
1771
453ec4bd
LT
1772/*
1773 * Read a directory tree. We currently ignore anything but
1774 * directories, regular files and symlinks. That's because git
1775 * doesn't handle them at all yet. Maybe that will change some
1776 * day.
1777 *
1778 * Also, we ignore the name ".git" (even if it is not a directory).
1779 * That likely will not change.
defd7c7b
KB
1780 *
1781 * Returns the most significant path_treatment value encountered in the scan.
453ec4bd 1782 */
defd7c7b 1783static enum path_treatment read_directory_recursive(struct dir_struct *dir,
53cc5356 1784 const char *base, int baselen,
0dcb8d7f 1785 struct untracked_cache_dir *untracked, int check_only,
e1b8c7bd 1786 const struct pathspec *pathspec)
453ec4bd 1787{
cf7c6148 1788 struct cached_dir cdir;
defd7c7b 1789 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1790 struct strbuf path = STRBUF_INIT;
453ec4bd 1791
bef36921 1792 strbuf_add(&path, base, baselen);
02cb6753 1793
207a06ce 1794 if (open_cached_dir(&cdir, dir, untracked, &the_index, &path, check_only))
1528d247
RS
1795 goto out;
1796
0dcb8d7f
NTND
1797 if (untracked)
1798 untracked->check_only = !!check_only;
1799
cf7c6148 1800 while (!read_cached_dir(&cdir)) {
defd7c7b 1801 /* check how the file or directory should be treated */
e1b8c7bd
BW
1802 state = treat_path(dir, untracked, &cdir, &path,
1803 baselen, pathspec);
0dcb8d7f 1804
defd7c7b
KB
1805 if (state > dir_state)
1806 dir_state = state;
1807
1808 /* recurse into subdir if instructed by treat_path */
1809 if (state == path_recurse) {
0dcb8d7f
NTND
1810 struct untracked_cache_dir *ud;
1811 ud = lookup_untracked(dir->untracked, untracked,
1812 path.buf + baselen,
1813 path.len - baselen);
1814 subdir_state =
e1b8c7bd
BW
1815 read_directory_recursive(dir, path.buf,
1816 path.len, ud,
1817 check_only, pathspec);
defd7c7b
KB
1818 if (subdir_state > dir_state)
1819 dir_state = subdir_state;
1820 }
1821
1822 if (check_only) {
1823 /* abort early if maximum state has been reached */
0dcb8d7f 1824 if (dir_state == path_untracked) {
91a2288b 1825 if (cdir.fdir)
0dcb8d7f 1826 add_untracked(untracked, path.buf + baselen);
defd7c7b 1827 break;
0dcb8d7f 1828 }
defd7c7b 1829 /* skip the dir_add_* part */
02cb6753 1830 continue;
453ec4bd 1831 }
defd7c7b
KB
1832
1833 /* add the path to the appropriate result list */
1834 switch (state) {
1835 case path_excluded:
1836 if (dir->flags & DIR_SHOW_IGNORED)
9e58beca 1837 dir_add_name(dir, &the_index, path.buf, path.len);
0aaf62b6
KB
1838 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1839 ((dir->flags & DIR_COLLECT_IGNORED) &&
1840 exclude_matches_pathspec(path.buf, path.len,
e1b8c7bd 1841 pathspec)))
9e58beca 1842 dir_add_ignored(dir, &the_index, path.buf, path.len);
defd7c7b
KB
1843 break;
1844
1845 case path_untracked:
0dcb8d7f
NTND
1846 if (dir->flags & DIR_SHOW_IGNORED)
1847 break;
9e58beca 1848 dir_add_name(dir, &the_index, path.buf, path.len);
91a2288b 1849 if (cdir.fdir)
0dcb8d7f 1850 add_untracked(untracked, path.buf + baselen);
1528d247 1851 break;
defd7c7b
KB
1852
1853 default:
1854 break;
1855 }
453ec4bd 1856 }
cf7c6148 1857 close_cached_dir(&cdir);
1528d247 1858 out:
bef36921 1859 strbuf_release(&path);
453ec4bd 1860
defd7c7b 1861 return dir_state;
453ec4bd
LT
1862}
1863
1864static int cmp_name(const void *p1, const void *p2)
1865{
1866 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1867 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1868
ccdd4a0f 1869 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
1870}
1871
48ffef96
JH
1872static int treat_leading_path(struct dir_struct *dir,
1873 const char *path, int len,
e1b8c7bd 1874 const struct pathspec *pathspec)
48ffef96 1875{
49dc2cc2
RS
1876 struct strbuf sb = STRBUF_INIT;
1877 int baselen, rc = 0;
48ffef96 1878 const char *cp;
be8a84c5 1879 int old_flags = dir->flags;
48ffef96
JH
1880
1881 while (len && path[len - 1] == '/')
1882 len--;
1883 if (!len)
1884 return 1;
1885 baselen = 0;
be8a84c5 1886 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
1887 while (1) {
1888 cp = path + baselen + !!baselen;
1889 cp = memchr(cp, '/', path + len - cp);
1890 if (!cp)
1891 baselen = len;
1892 else
1893 baselen = cp - path;
49dc2cc2
RS
1894 strbuf_setlen(&sb, 0);
1895 strbuf_add(&sb, path, baselen);
1896 if (!is_directory(sb.buf))
1897 break;
e1b8c7bd 1898 if (simplify_away(sb.buf, sb.len, pathspec))
49dc2cc2 1899 break;
e1b8c7bd 1900 if (treat_one_path(dir, NULL, &sb, baselen, pathspec,
defd7c7b 1901 DT_DIR, NULL) == path_none)
49dc2cc2
RS
1902 break; /* do not recurse into it */
1903 if (len <= baselen) {
1904 rc = 1;
1905 break; /* finished checking */
1906 }
48ffef96 1907 }
49dc2cc2 1908 strbuf_release(&sb);
be8a84c5 1909 dir->flags = old_flags;
49dc2cc2 1910 return rc;
48ffef96
JH
1911}
1912
1e8fef60
NTND
1913static const char *get_ident_string(void)
1914{
1915 static struct strbuf sb = STRBUF_INIT;
1916 struct utsname uts;
1917
1918 if (sb.len)
1919 return sb.buf;
100e4337 1920 if (uname(&uts) < 0)
1e8fef60 1921 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
1922 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
1923 uts.sysname);
1e8fef60
NTND
1924 return sb.buf;
1925}
1926
1927static int ident_in_untracked(const struct untracked_cache *uc)
1928{
0e0f7618
CC
1929 /*
1930 * Previous git versions may have saved many NUL separated
1931 * strings in the "ident" field, but it is insane to manage
1932 * many locations, so just take care of the first one.
1933 */
1e8fef60 1934
0e0f7618 1935 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
1936}
1937
0e0f7618 1938static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 1939{
0e0f7618 1940 strbuf_reset(&uc->ident);
1e8fef60 1941 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
1942
1943 /*
1944 * This strbuf used to contain a list of NUL separated
1945 * strings, so save NUL too for backward compatibility.
1946 */
1e8fef60
NTND
1947 strbuf_addch(&uc->ident, 0);
1948}
1949
4a4ca479
CC
1950static void new_untracked_cache(struct index_state *istate)
1951{
1952 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
1953 strbuf_init(&uc->ident, 100);
1954 uc->exclude_per_dir = ".gitignore";
1955 /* should be the same flags used by git-status */
1956 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 1957 set_untracked_ident(uc);
4a4ca479 1958 istate->untracked = uc;
0e0f7618 1959 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
1960}
1961
1962void add_untracked_cache(struct index_state *istate)
1963{
1964 if (!istate->untracked) {
1965 new_untracked_cache(istate);
0e0f7618
CC
1966 } else {
1967 if (!ident_in_untracked(istate->untracked)) {
1968 free_untracked_cache(istate->untracked);
1969 new_untracked_cache(istate);
1970 }
1971 }
4a4ca479
CC
1972}
1973
07b29bfd
CC
1974void remove_untracked_cache(struct index_state *istate)
1975{
1976 if (istate->untracked) {
1977 free_untracked_cache(istate->untracked);
1978 istate->untracked = NULL;
1979 istate->cache_changed |= UNTRACKED_CHANGED;
1980 }
1981}
1982
ccad261f
NTND
1983static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
1984 int base_len,
1985 const struct pathspec *pathspec)
1986{
1987 struct untracked_cache_dir *root;
1988
76e6b090 1989 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
ccad261f
NTND
1990 return NULL;
1991
1992 /*
1993 * We only support $GIT_DIR/info/exclude and core.excludesfile
1994 * as the global ignore rule files. Any other additions
1995 * (e.g. from command line) invalidate the cache. This
1996 * condition also catches running setup_standard_excludes()
1997 * before setting dir->untracked!
1998 */
1999 if (dir->unmanaged_exclude_files)
2000 return NULL;
2001
2002 /*
2003 * Optimize for the main use case only: whole-tree git
2004 * status. More work involved in treat_leading_path() if we
2005 * use cache on just a subset of the worktree. pathspec
2006 * support could make the matter even worse.
2007 */
2008 if (base_len || (pathspec && pathspec->nr))
2009 return NULL;
2010
2011 /* Different set of flags may produce different results */
2012 if (dir->flags != dir->untracked->dir_flags ||
2013 /*
2014 * See treat_directory(), case index_nonexistent. Without
2015 * this flag, we may need to also cache .git file content
2016 * for the resolve_gitlink_ref() call, which we don't.
2017 */
2018 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
2019 /* We don't support collecting ignore files */
2020 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
2021 DIR_COLLECT_IGNORED)))
2022 return NULL;
2023
2024 /*
2025 * If we use .gitignore in the cache and now you change it to
2026 * .gitexclude, everything will go wrong.
2027 */
2028 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
2029 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
2030 return NULL;
2031
2032 /*
2033 * EXC_CMDL is not considered in the cache. If people set it,
2034 * skip the cache.
2035 */
2036 if (dir->exclude_list_group[EXC_CMDL].nr)
2037 return NULL;
2038
1e8fef60 2039 if (!ident_in_untracked(dir->untracked)) {
0e0f7618 2040 warning(_("Untracked cache is disabled on this system or location."));
1e8fef60
NTND
2041 return NULL;
2042 }
2043
ccad261f
NTND
2044 if (!dir->untracked->root) {
2045 const int len = sizeof(*dir->untracked->root);
2046 dir->untracked->root = xmalloc(len);
2047 memset(dir->untracked->root, 0, len);
2048 }
2049
2050 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
2051 root = dir->untracked->root;
2052 if (hashcmp(dir->ss_info_exclude.sha1,
2053 dir->untracked->ss_info_exclude.sha1)) {
2054 invalidate_gitignore(dir->untracked, root);
2055 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
2056 }
2057 if (hashcmp(dir->ss_excludes_file.sha1,
2058 dir->untracked->ss_excludes_file.sha1)) {
2059 invalidate_gitignore(dir->untracked, root);
2060 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
2061 }
26cb0182
NTND
2062
2063 /* Make sure this directory is not dropped out at saving phase */
2064 root->recurse = 1;
ccad261f
NTND
2065 return root;
2066}
2067
e1b8c7bd
BW
2068int read_directory(struct dir_struct *dir, const char *path,
2069 int len, const struct pathspec *pathspec)
9fc42d60 2070{
ccad261f 2071 struct untracked_cache_dir *untracked;
b4189aa8 2072
dba2e203 2073 if (has_symlink_leading_path(path, len))
725b0605
JH
2074 return dir->nr;
2075
ccad261f
NTND
2076 untracked = validate_untracked_cache(dir, len, pathspec);
2077 if (!untracked)
2078 /*
2079 * make sure untracked cache code path is disabled,
2080 * e.g. prep_exclude()
2081 */
2082 dir->untracked = NULL;
e1b8c7bd
BW
2083 if (!len || treat_leading_path(dir, path, len, pathspec))
2084 read_directory_recursive(dir, path, len, untracked, 0, pathspec);
9ed0d8d6
RS
2085 QSORT(dir->entries, dir->nr, cmp_name);
2086 QSORT(dir->ignored, dir->ignored_nr, cmp_name);
c9ccb5d3
NTND
2087 if (dir->untracked) {
2088 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2089 trace_printf_key(&trace_untracked_stats,
2090 "node creation: %u\n"
2091 "gitignore invalidation: %u\n"
2092 "directory invalidation: %u\n"
2093 "opendir: %u\n",
2094 dir->untracked->dir_created,
2095 dir->untracked->gitignore_invalidated,
2096 dir->untracked->dir_invalidated,
2097 dir->untracked->dir_opened);
1bbb3dba
NTND
2098 if (dir->untracked == the_index.untracked &&
2099 (dir->untracked->dir_opened ||
2100 dir->untracked->gitignore_invalidated ||
2101 dir->untracked->dir_invalidated))
2102 the_index.cache_changed |= UNTRACKED_CHANGED;
2103 if (dir->untracked != the_index.untracked) {
2104 free(dir->untracked);
2105 dir->untracked = NULL;
2106 }
c9ccb5d3 2107 }
453ec4bd
LT
2108 return dir->nr;
2109}
c91f0d92 2110
686a4a06 2111int file_exists(const char *f)
c91f0d92 2112{
686a4a06 2113 struct stat sb;
a50f9fc5 2114 return lstat(f, &sb) == 0;
c91f0d92 2115}
e6636747 2116
63ec5e1f
JS
2117static int cmp_icase(char a, char b)
2118{
2119 if (a == b)
2120 return 0;
2121 if (ignore_case)
2122 return toupper(a) - toupper(b);
2123 return a - b;
2124}
2125
e6636747 2126/*
9b125da4
NTND
2127 * Given two normalized paths (a trailing slash is ok), if subdir is
2128 * outside dir, return -1. Otherwise return the offset in subdir that
2129 * can be used as relative path to dir.
e6636747 2130 */
9b125da4 2131int dir_inside_of(const char *subdir, const char *dir)
e6636747 2132{
9b125da4 2133 int offset = 0;
e6636747 2134
9b125da4 2135 assert(dir && subdir && *dir && *subdir);
e6636747 2136
63ec5e1f 2137 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2138 dir++;
9b125da4
NTND
2139 subdir++;
2140 offset++;
490544b1 2141 }
9b125da4
NTND
2142
2143 /* hel[p]/me vs hel[l]/yeah */
2144 if (*dir && *subdir)
2145 return -1;
2146
2147 if (!*subdir)
2148 return !*dir ? offset : -1; /* same dir */
2149
2150 /* foo/[b]ar vs foo/[] */
2151 if (is_dir_sep(dir[-1]))
2152 return is_dir_sep(subdir[-1]) ? offset : -1;
2153
2154 /* foo[/]bar vs foo[] */
2155 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2156}
2157
2158int is_inside_dir(const char *dir)
2159{
56b9f6e7
RS
2160 char *cwd;
2161 int rc;
2162
b892913d
NTND
2163 if (!dir)
2164 return 0;
56b9f6e7
RS
2165
2166 cwd = xgetcwd();
2167 rc = (dir_inside_of(cwd, dir) >= 0);
2168 free(cwd);
2169 return rc;
e6636747 2170}
7155b727 2171
55892d23
AP
2172int is_empty_dir(const char *path)
2173{
2174 DIR *dir = opendir(path);
2175 struct dirent *e;
2176 int ret = 1;
2177
2178 if (!dir)
2179 return 0;
2180
2181 while ((e = readdir(dir)) != NULL)
2182 if (!is_dot_or_dotdot(e->d_name)) {
2183 ret = 0;
2184 break;
2185 }
2186
2187 closedir(dir);
2188 return ret;
2189}
2190
ae2f203e 2191static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2192{
a0f4afbe 2193 DIR *dir;
7155b727 2194 struct dirent *e;
ae2f203e 2195 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2196 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2197 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
a0f4afbe 2198 unsigned char submodule_head[20];
7155b727 2199
a0f4afbe 2200 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
ae2f203e 2201 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
a0f4afbe 2202 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2203 if (kept_up)
2204 *kept_up = 1;
a0f4afbe 2205 return 0;
ae2f203e 2206 }
a0f4afbe 2207
ae2f203e 2208 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2209 dir = opendir(path->buf);
c844a803 2210 if (!dir) {
863808cd
MH
2211 if (errno == ENOENT)
2212 return keep_toplevel ? -1 : 0;
2213 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2214 /*
2215 * An empty dir could be removable even if it
2216 * is unreadable:
2217 */
c844a803
JH
2218 return rmdir(path->buf);
2219 else
2220 return -1;
2221 }
00b6c178 2222 strbuf_complete(path, '/');
7155b727
JS
2223
2224 len = path->len;
2225 while ((e = readdir(dir)) != NULL) {
2226 struct stat st;
8ca12c0d
AP
2227 if (is_dot_or_dotdot(e->d_name))
2228 continue;
7155b727
JS
2229
2230 strbuf_setlen(path, len);
2231 strbuf_addstr(path, e->d_name);
863808cd
MH
2232 if (lstat(path->buf, &st)) {
2233 if (errno == ENOENT)
2234 /*
2235 * file disappeared, which is what we
2236 * wanted anyway
2237 */
2238 continue;
2239 /* fall thru */
2240 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2241 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2242 continue; /* happy */
863808cd
MH
2243 } else if (!only_empty &&
2244 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2245 continue; /* happy, too */
863808cd 2246 }
7155b727
JS
2247
2248 /* path too long, stat fails, or non-directory still exists */
2249 ret = -1;
2250 break;
2251 }
2252 closedir(dir);
2253
2254 strbuf_setlen(path, original_len);
ae2f203e 2255 if (!ret && !keep_toplevel && !kept_down)
863808cd 2256 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2257 else if (kept_up)
2258 /*
2259 * report the uplevel that it is not an error that we
2260 * did not rmdir() our directory.
2261 */
2262 *kept_up = !ret;
7155b727
JS
2263 return ret;
2264}
039bc64e 2265
ae2f203e
JH
2266int remove_dir_recursively(struct strbuf *path, int flag)
2267{
2268 return remove_dir_recurse(path, flag, NULL);
2269}
2270
f932729c
JK
2271static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2272
039bc64e
JH
2273void setup_standard_excludes(struct dir_struct *dir)
2274{
039bc64e 2275 dir->exclude_per_dir = ".gitignore";
099d2d86
JH
2276
2277 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2845ce7f
PT
2278 if (!excludes_file)
2279 excludes_file = xdg_config_home("ignore");
4698c8fe 2280 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2281 add_excludes_from_file_1(dir, excludes_file,
2282 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2283
2284 /* per repository user preference */
f0056f64
JK
2285 if (startup_info->have_repository) {
2286 const char *path = git_path_info_exclude();
2287 if (!access_or_warn(path, R_OK, 0))
2288 add_excludes_from_file_1(dir, path,
2289 dir->untracked ? &dir->ss_info_exclude : NULL);
2290 }
039bc64e 2291}
4a92d1bf
AR
2292
2293int remove_path(const char *name)
2294{
2295 char *slash;
2296
9a6728d4 2297 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)
4a92d1bf
AR
2298 return -1;
2299
2300 slash = strrchr(name, '/');
2301 if (slash) {
2302 char *dirs = xstrdup(name);
2303 slash = dirs + (slash - name);
2304 do {
2305 *slash = '\0';
3fc0d131 2306 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2307 free(dirs);
2308 }
2309 return 0;
2310}
2311
270be816
AS
2312/*
2313 * Frees memory within dir which was allocated for exclude lists and
2314 * the exclude_stack. Does not free dir itself.
2315 */
2316void clear_directory(struct dir_struct *dir)
2317{
2318 int i, j;
2319 struct exclude_list_group *group;
2320 struct exclude_list *el;
2321 struct exclude_stack *stk;
2322
2323 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2324 group = &dir->exclude_list_group[i];
2325 for (j = 0; j < group->nr; j++) {
2326 el = &group->el[j];
2327 if (i == EXC_DIRS)
2328 free((char *)el->src);
2329 clear_exclude_list(el);
2330 }
2331 free(group->el);
2332 }
2333
2334 stk = dir->exclude_stack;
2335 while (stk) {
2336 struct exclude_stack *prev = stk->prev;
2337 free(stk);
2338 stk = prev;
2339 }
aceb9429 2340 strbuf_release(&dir->basebuf);
270be816 2341}
83c094ad
NTND
2342
2343struct ondisk_untracked_cache {
2344 struct stat_data info_exclude_stat;
2345 struct stat_data excludes_file_stat;
2346 uint32_t dir_flags;
2347 unsigned char info_exclude_sha1[20];
2348 unsigned char excludes_file_sha1[20];
2349 char exclude_per_dir[FLEX_ARRAY];
2350};
2351
2352#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)
2353
2354struct write_data {
2355 int index; /* number of written untracked_cache_dir */
2356 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2357 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2358 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2359 struct strbuf out;
2360 struct strbuf sb_stat;
2361 struct strbuf sb_sha1;
2362};
2363
2364static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2365{
2366 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2367 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2368 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2369 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2370 to->sd_dev = htonl(from->sd_dev);
2371 to->sd_ino = htonl(from->sd_ino);
2372 to->sd_uid = htonl(from->sd_uid);
2373 to->sd_gid = htonl(from->sd_gid);
2374 to->sd_size = htonl(from->sd_size);
2375}
2376
2377static void write_one_dir(struct untracked_cache_dir *untracked,
2378 struct write_data *wd)
2379{
2380 struct stat_data stat_data;
2381 struct strbuf *out = &wd->out;
2382 unsigned char intbuf[16];
2383 unsigned int intlen, value;
2384 int i = wd->index++;
2385
2386 /*
2387 * untracked_nr should be reset whenever valid is clear, but
2388 * for safety..
2389 */
2390 if (!untracked->valid) {
2391 untracked->untracked_nr = 0;
2392 untracked->check_only = 0;
2393 }
2394
2395 if (untracked->check_only)
2396 ewah_set(wd->check_only, i);
2397 if (untracked->valid) {
2398 ewah_set(wd->valid, i);
2399 stat_data_to_disk(&stat_data, &untracked->stat_data);
2400 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2401 }
2402 if (!is_null_sha1(untracked->exclude_sha1)) {
2403 ewah_set(wd->sha1_valid, i);
2404 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2405 }
2406
2407 intlen = encode_varint(untracked->untracked_nr, intbuf);
2408 strbuf_add(out, intbuf, intlen);
2409
2410 /* skip non-recurse directories */
2411 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2412 if (untracked->dirs[i]->recurse)
2413 value++;
2414 intlen = encode_varint(value, intbuf);
2415 strbuf_add(out, intbuf, intlen);
2416
2417 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2418
2419 for (i = 0; i < untracked->untracked_nr; i++)
2420 strbuf_add(out, untracked->untracked[i],
2421 strlen(untracked->untracked[i]) + 1);
2422
2423 for (i = 0; i < untracked->dirs_nr; i++)
2424 if (untracked->dirs[i]->recurse)
2425 write_one_dir(untracked->dirs[i], wd);
2426}
2427
2428void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2429{
2430 struct ondisk_untracked_cache *ouc;
2431 struct write_data wd;
2432 unsigned char varbuf[16];
e0b83735
JK
2433 int varint_len;
2434 size_t len = strlen(untracked->exclude_per_dir);
2435
2436 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
83c094ad
NTND
2437 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2438 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2439 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2440 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2441 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2442
2443 varint_len = encode_varint(untracked->ident.len, varbuf);
2444 strbuf_add(out, varbuf, varint_len);
8109984d 2445 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2446
83c094ad
NTND
2447 strbuf_add(out, ouc, ouc_size(len));
2448 free(ouc);
2449 ouc = NULL;
2450
2451 if (!untracked->root) {
2452 varint_len = encode_varint(0, varbuf);
2453 strbuf_add(out, varbuf, varint_len);
2454 return;
2455 }
2456
2457 wd.index = 0;
2458 wd.check_only = ewah_new();
2459 wd.valid = ewah_new();
2460 wd.sha1_valid = ewah_new();
2461 strbuf_init(&wd.out, 1024);
2462 strbuf_init(&wd.sb_stat, 1024);
2463 strbuf_init(&wd.sb_sha1, 1024);
2464 write_one_dir(untracked->root, &wd);
2465
2466 varint_len = encode_varint(wd.index, varbuf);
2467 strbuf_add(out, varbuf, varint_len);
2468 strbuf_addbuf(out, &wd.out);
2469 ewah_serialize_strbuf(wd.valid, out);
2470 ewah_serialize_strbuf(wd.check_only, out);
2471 ewah_serialize_strbuf(wd.sha1_valid, out);
2472 strbuf_addbuf(out, &wd.sb_stat);
2473 strbuf_addbuf(out, &wd.sb_sha1);
2474 strbuf_addch(out, '\0'); /* safe guard for string lists */
2475
2476 ewah_free(wd.valid);
2477 ewah_free(wd.check_only);
2478 ewah_free(wd.sha1_valid);
2479 strbuf_release(&wd.out);
2480 strbuf_release(&wd.sb_stat);
2481 strbuf_release(&wd.sb_sha1);
2482}
f9e6c649
NTND
2483
2484static void free_untracked(struct untracked_cache_dir *ucd)
2485{
2486 int i;
2487 if (!ucd)
2488 return;
2489 for (i = 0; i < ucd->dirs_nr; i++)
2490 free_untracked(ucd->dirs[i]);
2491 for (i = 0; i < ucd->untracked_nr; i++)
2492 free(ucd->untracked[i]);
2493 free(ucd->untracked);
2494 free(ucd->dirs);
2495 free(ucd);
2496}
2497
2498void free_untracked_cache(struct untracked_cache *uc)
2499{
2500 if (uc)
2501 free_untracked(uc->root);
2502 free(uc);
2503}
2504
2505struct read_data {
2506 int index;
2507 struct untracked_cache_dir **ucd;
2508 struct ewah_bitmap *check_only;
2509 struct ewah_bitmap *valid;
2510 struct ewah_bitmap *sha1_valid;
2511 const unsigned char *data;
2512 const unsigned char *end;
2513};
2514
2515static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
2516{
2517 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
2518 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
2519 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
2520 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
2521 to->sd_dev = get_be32(&from->sd_dev);
2522 to->sd_ino = get_be32(&from->sd_ino);
2523 to->sd_uid = get_be32(&from->sd_uid);
2524 to->sd_gid = get_be32(&from->sd_gid);
2525 to->sd_size = get_be32(&from->sd_size);
2526}
2527
2528static int read_one_dir(struct untracked_cache_dir **untracked_,
2529 struct read_data *rd)
2530{
2531 struct untracked_cache_dir ud, *untracked;
2532 const unsigned char *next, *data = rd->data, *end = rd->end;
2533 unsigned int value;
2534 int i, len;
2535
2536 memset(&ud, 0, sizeof(ud));
2537
2538 next = data;
2539 value = decode_varint(&next);
2540 if (next > end)
2541 return -1;
2542 ud.recurse = 1;
2543 ud.untracked_alloc = value;
2544 ud.untracked_nr = value;
2545 if (ud.untracked_nr)
b32fa95f 2546 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649
NTND
2547 data = next;
2548
2549 next = data;
2550 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2551 if (next > end)
2552 return -1;
b32fa95f 2553 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649
NTND
2554 data = next;
2555
2556 len = strlen((const char *)data);
2557 next = data + len + 1;
2558 if (next > rd->end)
2559 return -1;
50a6c8ef 2560 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));
f9e6c649
NTND
2561 memcpy(untracked, &ud, sizeof(ud));
2562 memcpy(untracked->name, data, len + 1);
2563 data = next;
2564
2565 for (i = 0; i < untracked->untracked_nr; i++) {
2566 len = strlen((const char *)data);
2567 next = data + len + 1;
2568 if (next > rd->end)
2569 return -1;
2570 untracked->untracked[i] = xstrdup((const char*)data);
2571 data = next;
2572 }
2573
2574 rd->ucd[rd->index++] = untracked;
2575 rd->data = data;
2576
2577 for (i = 0; i < untracked->dirs_nr; i++) {
2578 len = read_one_dir(untracked->dirs + i, rd);
2579 if (len < 0)
2580 return -1;
2581 }
2582 return 0;
2583}
2584
2585static void set_check_only(size_t pos, void *cb)
2586{
2587 struct read_data *rd = cb;
2588 struct untracked_cache_dir *ud = rd->ucd[pos];
2589 ud->check_only = 1;
2590}
2591
2592static void read_stat(size_t pos, void *cb)
2593{
2594 struct read_data *rd = cb;
2595 struct untracked_cache_dir *ud = rd->ucd[pos];
2596 if (rd->data + sizeof(struct stat_data) > rd->end) {
2597 rd->data = rd->end + 1;
2598 return;
2599 }
2600 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
2601 rd->data += sizeof(struct stat_data);
2602 ud->valid = 1;
2603}
2604
2605static void read_sha1(size_t pos, void *cb)
2606{
2607 struct read_data *rd = cb;
2608 struct untracked_cache_dir *ud = rd->ucd[pos];
2609 if (rd->data + 20 > rd->end) {
2610 rd->data = rd->end + 1;
2611 return;
2612 }
2613 hashcpy(ud->exclude_sha1, rd->data);
2614 rd->data += 20;
2615}
2616
2617static void load_sha1_stat(struct sha1_stat *sha1_stat,
2618 const struct stat_data *stat,
2619 const unsigned char *sha1)
2620{
2621 stat_data_from_disk(&sha1_stat->stat, stat);
2622 hashcpy(sha1_stat->sha1, sha1);
2623 sha1_stat->valid = 1;
2624}
2625
2626struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2627{
2628 const struct ondisk_untracked_cache *ouc;
2629 struct untracked_cache *uc;
2630 struct read_data rd;
2631 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60
NTND
2632 const char *ident;
2633 int ident_len, len;
f9e6c649
NTND
2634
2635 if (sz <= 1 || end[-1] != '\0')
2636 return NULL;
2637 end--;
2638
1e8fef60
NTND
2639 ident_len = decode_varint(&next);
2640 if (next + ident_len > end)
2641 return NULL;
2642 ident = (const char *)next;
2643 next += ident_len;
2644
f9e6c649
NTND
2645 ouc = (const struct ondisk_untracked_cache *)next;
2646 if (next + ouc_size(0) > end)
2647 return NULL;
2648
2649 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2650 strbuf_init(&uc->ident, ident_len);
2651 strbuf_add(&uc->ident, ident, ident_len);
f9e6c649
NTND
2652 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
2653 ouc->info_exclude_sha1);
2654 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
2655 ouc->excludes_file_sha1);
2656 uc->dir_flags = get_be32(&ouc->dir_flags);
2657 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
2658 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
2659 next += ouc_size(strlen(ouc->exclude_per_dir));
2660 if (next >= end)
2661 goto done2;
2662
2663 len = decode_varint(&next);
2664 if (next > end || len == 0)
2665 goto done2;
2666
2667 rd.valid = ewah_new();
2668 rd.check_only = ewah_new();
2669 rd.sha1_valid = ewah_new();
2670 rd.data = next;
2671 rd.end = end;
2672 rd.index = 0;
b32fa95f 2673 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2674
2675 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2676 goto done;
2677
2678 next = rd.data;
2679 len = ewah_read_mmap(rd.valid, next, end - next);
2680 if (len < 0)
2681 goto done;
2682
2683 next += len;
2684 len = ewah_read_mmap(rd.check_only, next, end - next);
2685 if (len < 0)
2686 goto done;
2687
2688 next += len;
2689 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2690 if (len < 0)
2691 goto done;
2692
2693 ewah_each_bit(rd.check_only, set_check_only, &rd);
2694 rd.data = next + len;
2695 ewah_each_bit(rd.valid, read_stat, &rd);
2696 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2697 next = rd.data;
2698
2699done:
2700 free(rd.ucd);
2701 ewah_free(rd.valid);
2702 ewah_free(rd.check_only);
2703 ewah_free(rd.sha1_valid);
2704done2:
2705 if (next != end) {
2706 free_untracked_cache(uc);
2707 uc = NULL;
2708 }
2709 return uc;
2710}
e931371a 2711
73f9145f
NTND
2712static void invalidate_one_directory(struct untracked_cache *uc,
2713 struct untracked_cache_dir *ucd)
2714{
2715 uc->dir_invalidated++;
2716 ucd->valid = 0;
2717 ucd->untracked_nr = 0;
2718}
2719
2720/*
2721 * Normally when an entry is added or removed from a directory,
2722 * invalidating that directory is enough. No need to touch its
2723 * ancestors. When a directory is shown as "foo/bar/" in git-status
2724 * however, deleting or adding an entry may have cascading effect.
2725 *
2726 * Say the "foo/bar/file" has become untracked, we need to tell the
2727 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2728 * directory any more (because "bar" is managed by foo as an untracked
2729 * "file").
2730 *
2731 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2732 * was the last untracked entry in the entire "foo", we should show
2733 * "foo/" instead. Which means we have to invalidate past "bar" up to
2734 * "foo".
2735 *
2736 * This function traverses all directories from root to leaf. If there
2737 * is a chance of one of the above cases happening, we invalidate back
2738 * to root. Otherwise we just invalidate the leaf. There may be a more
2739 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2740 * detect these cases and avoid unnecessary invalidation, for example,
2741 * checking for the untracked entry named "bar/" in "foo", but for now
2742 * stick to something safe and simple.
2743 */
2744static int invalidate_one_component(struct untracked_cache *uc,
2745 struct untracked_cache_dir *dir,
2746 const char *path, int len)
2747{
2748 const char *rest = strchr(path, '/');
2749
2750 if (rest) {
2751 int component_len = rest - path;
2752 struct untracked_cache_dir *d =
2753 lookup_untracked(uc, dir, path, component_len);
2754 int ret =
2755 invalidate_one_component(uc, d, rest + 1,
2756 len - (component_len + 1));
2757 if (ret)
2758 invalidate_one_directory(uc, dir);
2759 return ret;
2760 }
2761
2762 invalidate_one_directory(uc, dir);
2763 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2764}
2765
e931371a
NTND
2766void untracked_cache_invalidate_path(struct index_state *istate,
2767 const char *path)
2768{
e931371a
NTND
2769 if (!istate->untracked || !istate->untracked->root)
2770 return;
73f9145f
NTND
2771 invalidate_one_component(istate->untracked, istate->untracked->root,
2772 path, strlen(path));
e931371a
NTND
2773}
2774
2775void untracked_cache_remove_from_index(struct index_state *istate,
2776 const char *path)
2777{
2778 untracked_cache_invalidate_path(istate, path);
2779}
2780
2781void untracked_cache_add_to_index(struct index_state *istate,
2782 const char *path)
2783{
2784 untracked_cache_invalidate_path(istate, path);
2785}
47e83eb3
SB
2786
2787/* Update gitfile and core.worktree setting to connect work tree and git dir */
2788void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
2789{
365444a6
SB
2790 struct strbuf gitfile_sb = STRBUF_INIT;
2791 struct strbuf cfg_sb = STRBUF_INIT;
47e83eb3 2792 struct strbuf rel_path = STRBUF_INIT;
365444a6 2793 char *git_dir, *work_tree;
47e83eb3 2794
365444a6
SB
2795 /* Prepare .git file */
2796 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);
2797 if (safe_create_leading_directories_const(gitfile_sb.buf))
2798 die(_("could not create directories for %s"), gitfile_sb.buf);
2799
2800 /* Prepare config file */
2801 strbuf_addf(&cfg_sb, "%s/config", git_dir_);
2802 if (safe_create_leading_directories_const(cfg_sb.buf))
2803 die(_("could not create directories for %s"), cfg_sb.buf);
47e83eb3 2804
e394fa01
JH
2805 git_dir = real_pathdup(git_dir_, 1);
2806 work_tree = real_pathdup(work_tree_, 1);
365444a6
SB
2807
2808 /* Write .git file */
2809 write_file(gitfile_sb.buf, "gitdir: %s",
2810 relative_path(git_dir, work_tree, &rel_path));
47e83eb3 2811 /* Update core.worktree setting */
365444a6 2812 git_config_set_in_file(cfg_sb.buf, "core.worktree",
47e83eb3
SB
2813 relative_path(work_tree, git_dir, &rel_path));
2814
365444a6
SB
2815 strbuf_release(&gitfile_sb);
2816 strbuf_release(&cfg_sb);
47e83eb3
SB
2817 strbuf_release(&rel_path);
2818 free(work_tree);
2819 free(git_dir);
2820}
f6f85861
SB
2821
2822/*
2823 * Migrate the git directory of the given path from old_git_dir to new_git_dir.
2824 */
2825void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
2826{
2827 if (rename(old_git_dir, new_git_dir) < 0)
2828 die_errno(_("could not migrate git directory from '%s' to '%s'"),
2829 old_git_dir, new_git_dir);
2830
2831 connect_work_tree_and_git_dir(path, new_git_dir);
2832}