dir: stop using the index compatibility macros
[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);
caa6b782 51static int get_dtype(struct dirent *de, const char *path, int len);
09595258 52
ba0897e6 53int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
54{
55 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
56}
57
ba0897e6 58int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
59{
60 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
61}
62
1f26ce61
CB
63int git_fnmatch(const struct pathspec_item *item,
64 const char *pattern, const char *string,
65 int prefix)
5d74762d 66{
5d74762d 67 if (prefix > 0) {
93d93537 68 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 69 return WM_NOMATCH;
5d74762d
NTND
70 pattern += prefix;
71 string += prefix;
72 }
bd30c2e4 73 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
74 int pattern_len = strlen(++pattern);
75 int string_len = strlen(string);
76 return string_len < pattern_len ||
93d93537
NTND
77 ps_strcmp(item, pattern,
78 string + string_len - pattern_len);
8c6abbcd 79 }
bd30c2e4 80 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
81 return wildmatch(pattern, string,
82 WM_PATHNAME |
83 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0),
84 NULL);
bd30c2e4
NTND
85 else
86 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f
NTND
87 return wildmatch(pattern, string,
88 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
89 NULL);
5d74762d
NTND
90}
91
0b6e56df
JH
92static int fnmatch_icase_mem(const char *pattern, int patternlen,
93 const char *string, int stringlen,
94 int flags)
95{
96 int match_status;
97 struct strbuf pat_buf = STRBUF_INIT;
98 struct strbuf str_buf = STRBUF_INIT;
99 const char *use_pat = pattern;
100 const char *use_str = string;
101
102 if (pattern[patternlen]) {
103 strbuf_add(&pat_buf, pattern, patternlen);
104 use_pat = pat_buf.buf;
105 }
106 if (string[stringlen]) {
107 strbuf_add(&str_buf, string, stringlen);
108 use_str = str_buf.buf;
109 }
110
f30366b2
JH
111 if (ignore_case)
112 flags |= WM_CASEFOLD;
113 match_status = wildmatch(use_pat, use_str, flags, NULL);
0b6e56df
JH
114
115 strbuf_release(&pat_buf);
116 strbuf_release(&str_buf);
117
118 return match_status;
119}
120
827f4d6c 121static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 122{
827f4d6c 123 int n;
4a085b16 124 size_t max = 0;
3c6a370b 125
93d93537
NTND
126 /*
127 * ":(icase)path" is treated as a pathspec full of
128 * wildcard. In other words, only prefix is considered common
129 * prefix. If the pathspec is abc/foo abc/bar, running in
130 * subdir xyz, the common prefix is still xyz, not xuz/abc as
131 * in non-:(icase).
132 */
5c6933d2
NTND
133 GUARD_PATHSPEC(pathspec,
134 PATHSPEC_FROMTOP |
135 PATHSPEC_MAXDEPTH |
bd30c2e4 136 PATHSPEC_LITERAL |
93d93537 137 PATHSPEC_GLOB |
ef79b1f8 138 PATHSPEC_ICASE |
b0db7046
BW
139 PATHSPEC_EXCLUDE |
140 PATHSPEC_ATTR);
4a085b16 141
827f4d6c 142 for (n = 0; n < pathspec->nr; n++) {
93d93537 143 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
144 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
145 continue;
93d93537
NTND
146 if (pathspec->items[n].magic & PATHSPEC_ICASE)
147 item_len = pathspec->items[n].prefix;
148 else
149 item_len = pathspec->items[n].nowildcard_len;
150 while (i < item_len && (n == 0 || i < max)) {
827f4d6c
NTND
151 char c = pathspec->items[n].match[i];
152 if (c != pathspec->items[0].match[i])
4a085b16
JH
153 break;
154 if (c == '/')
155 len = i + 1;
827f4d6c 156 i++;
4a085b16 157 }
827f4d6c 158 if (n == 0 || len < max) {
4a085b16
JH
159 max = len;
160 if (!max)
161 break;
162 }
3c6a370b 163 }
4a085b16 164 return max;
3c6a370b
LT
165}
166
f950eb95
CB
167/*
168 * Returns a copy of the longest leading path common among all
169 * pathspecs.
170 */
827f4d6c 171char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
172{
173 unsigned long len = common_prefix_len(pathspec);
174
827f4d6c 175 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
176}
177
7327d3d1 178int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
1d8842d9 179{
bec5ab89 180 const char *prefix;
966de302 181 size_t prefix_len;
1d8842d9
LT
182
183 /*
184 * Calculate common prefix for the pathspec, and
185 * use that to optimize the directory walk
186 */
bec5ab89
RS
187 prefix_len = common_prefix_len(pathspec);
188 prefix = prefix_len ? pathspec->items[0].match : "";
1d8842d9
LT
189
190 /* Read the directory and prune it */
966de302
BW
191 read_directory(dir, prefix, prefix_len, pathspec);
192
966de302 193 return prefix_len;
1d8842d9
LT
194}
195
bc96cc87
NTND
196int within_depth(const char *name, int namelen,
197 int depth, int max_depth)
198{
199 const char *cp = name, *cpe = name + namelen;
200
201 while (cp < cpe) {
202 if (*cp++ != '/')
203 continue;
204 depth++;
205 if (depth > max_depth)
206 return 0;
207 }
208 return 1;
209}
210
75a6315f
BW
211#define DO_MATCH_EXCLUDE (1<<0)
212#define DO_MATCH_DIRECTORY (1<<1)
213#define DO_MATCH_SUBMODULE (1<<2)
42b0874a 214
b0db7046
BW
215static int match_attrs(const char *name, int namelen,
216 const struct pathspec_item *item)
217{
218 int i;
219
220 git_check_attr(name, item->attr_check);
221 for (i = 0; i < item->attr_match_nr; i++) {
222 const char *value;
223 int matched;
224 enum attr_match_mode match_mode;
225
226 value = item->attr_check->items[i].value;
227 match_mode = item->attr_match[i].match_mode;
228
229 if (ATTR_TRUE(value))
230 matched = (match_mode == MATCH_SET);
231 else if (ATTR_FALSE(value))
232 matched = (match_mode == MATCH_UNSET);
233 else if (ATTR_UNSET(value))
234 matched = (match_mode == MATCH_UNSPECIFIED);
235 else
236 matched = (match_mode == MATCH_VALUE &&
237 !strcmp(item->attr_match[i].value, value));
238 if (!matched)
239 return 0;
240 }
241
242 return 1;
243}
244
61cf2820
NTND
245/*
246 * Does 'match' match the given name?
247 * A match is found if
248 *
249 * (1) the 'match' string is leading directory of 'name', or
250 * (2) the 'match' string is a wildcard and matches 'name', or
251 * (3) the 'match' string is exactly the same as 'name'.
252 *
253 * and the return value tells which case it was.
254 *
255 * It returns 0 when there is no match.
256 */
257static int match_pathspec_item(const struct pathspec_item *item, int prefix,
42b0874a 258 const char *name, int namelen, unsigned flags)
61cf2820
NTND
259{
260 /* name/namelen has prefix cut off by caller */
261 const char *match = item->match + prefix;
262 int matchlen = item->len - prefix;
263
93d93537
NTND
264 /*
265 * The normal call pattern is:
266 * 1. prefix = common_prefix_len(ps);
267 * 2. prune something, or fill_directory
854b0959 268 * 3. match_pathspec()
93d93537
NTND
269 *
270 * 'prefix' at #1 may be shorter than the command's prefix and
271 * it's ok for #2 to match extra files. Those extras will be
272 * trimmed at #3.
273 *
274 * Suppose the pathspec is 'foo' and '../bar' running from
275 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
276 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
277 * user does not want XYZ/foo, only the "foo" part should be
278 * case-insensitive. We need to filter out XYZ/foo here. In
279 * other words, we do not trust the caller on comparing the
280 * prefix part when :(icase) is involved. We do exact
281 * comparison ourselves.
282 *
283 * Normally the caller (common_prefix_len() in fact) does
284 * _exact_ matching on name[-prefix+1..-1] and we do not need
285 * to check that part. Be defensive and check it anyway, in
286 * case common_prefix_len is changed, or a new caller is
287 * introduced that does not use common_prefix_len.
288 *
289 * If the penalty turns out too high when prefix is really
290 * long, maybe change it to
291 * strncmp(match, name, item->prefix - prefix)
292 */
293 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
294 strncmp(item->match, name - prefix, item->prefix))
295 return 0;
296
b0db7046
BW
297 if (item->attr_match_nr && !match_attrs(name, namelen, item))
298 return 0;
299
61cf2820
NTND
300 /* If the match was just the prefix, we matched */
301 if (!*match)
302 return MATCHED_RECURSIVELY;
303
93d93537 304 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
305 if (matchlen == namelen)
306 return MATCHED_EXACTLY;
307
308 if (match[matchlen-1] == '/' || name[matchlen] == '/')
309 return MATCHED_RECURSIVELY;
68690fdd
NTND
310 } else if ((flags & DO_MATCH_DIRECTORY) &&
311 match[matchlen - 1] == '/' &&
312 namelen == matchlen - 1 &&
313 !ps_strncmp(item, match, name, namelen))
314 return MATCHED_EXACTLY;
61cf2820 315
5d74762d 316 if (item->nowildcard_len < item->len &&
bd30c2e4 317 !git_fnmatch(item, match, name,
8c6abbcd 318 item->nowildcard_len - prefix))
61cf2820
NTND
319 return MATCHED_FNMATCH;
320
75a6315f
BW
321 /* Perform checks to see if "name" is a super set of the pathspec */
322 if (flags & DO_MATCH_SUBMODULE) {
323 /* name is a literal prefix of the pathspec */
324 if ((namelen < matchlen) &&
325 (match[namelen] == '/') &&
326 !ps_strncmp(item, match, name, namelen))
327 return MATCHED_RECURSIVELY;
328
329 /* name" doesn't match up to the first wild character */
330 if (item->nowildcard_len < item->len &&
331 ps_strncmp(item, match, name,
332 item->nowildcard_len - prefix))
333 return 0;
334
335 /*
336 * Here is where we would perform a wildmatch to check if
337 * "name" can be matched as a directory (or a prefix) against
338 * the pathspec. Since wildmatch doesn't have this capability
339 * at the present we have to punt and say that it is a match,
340 * potentially returning a false positive
341 * The submodules themselves will be able to perform more
342 * accurate matching to determine if the pathspec matches.
343 */
344 return MATCHED_RECURSIVELY;
345 }
346
61cf2820
NTND
347 return 0;
348}
349
350/*
52ed1894
AS
351 * Given a name and a list of pathspecs, returns the nature of the
352 * closest (i.e. most specific) match of the name to any of the
353 * pathspecs.
354 *
355 * The caller typically calls this multiple times with the same
356 * pathspec and seen[] array but with different name/namelen
357 * (e.g. entries from the index) and is interested in seeing if and
358 * how each pathspec matches all the names it calls this function
359 * with. A mark is left in the seen[] array for each pathspec element
360 * indicating the closest type of match that element achieved, so if
361 * seen[n] remains zero after multiple invocations, that means the nth
362 * pathspec did not match any names, which could indicate that the
363 * user mistyped the nth pathspec.
61cf2820 364 */
854b0959
NTND
365static int do_match_pathspec(const struct pathspec *ps,
366 const char *name, int namelen,
367 int prefix, char *seen,
42b0874a 368 unsigned flags)
61cf2820 369{
42b0874a 370 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 371
5c6933d2
NTND
372 GUARD_PATHSPEC(ps,
373 PATHSPEC_FROMTOP |
374 PATHSPEC_MAXDEPTH |
bd30c2e4 375 PATHSPEC_LITERAL |
93d93537 376 PATHSPEC_GLOB |
ef79b1f8 377 PATHSPEC_ICASE |
b0db7046
BW
378 PATHSPEC_EXCLUDE |
379 PATHSPEC_ATTR);
8f4f8f45 380
61cf2820 381 if (!ps->nr) {
6330a171
NTND
382 if (!ps->recursive ||
383 !(ps->magic & PATHSPEC_MAXDEPTH) ||
384 ps->max_depth == -1)
61cf2820
NTND
385 return MATCHED_RECURSIVELY;
386
387 if (within_depth(name, namelen, 0, ps->max_depth))
388 return MATCHED_EXACTLY;
389 else
390 return 0;
391 }
392
393 name += prefix;
394 namelen -= prefix;
395
396 for (i = ps->nr - 1; i >= 0; i--) {
397 int how;
ef79b1f8
NTND
398
399 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
400 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
401 continue;
402
61cf2820
NTND
403 if (seen && seen[i] == MATCHED_EXACTLY)
404 continue;
ef79b1f8
NTND
405 /*
406 * Make exclude patterns optional and never report
407 * "pathspec ':(exclude)foo' matches no files"
408 */
409 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
410 seen[i] = MATCHED_FNMATCH;
42b0874a
NTND
411 how = match_pathspec_item(ps->items+i, prefix, name,
412 namelen, flags);
6330a171
NTND
413 if (ps->recursive &&
414 (ps->magic & PATHSPEC_MAXDEPTH) &&
415 ps->max_depth != -1 &&
61cf2820
NTND
416 how && how != MATCHED_FNMATCH) {
417 int len = ps->items[i].len;
418 if (name[len] == '/')
419 len++;
420 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
421 how = MATCHED_EXACTLY;
422 else
423 how = 0;
424 }
425 if (how) {
426 if (retval < how)
427 retval = how;
428 if (seen && seen[i] < how)
429 seen[i] = how;
430 }
431 }
432 return retval;
433}
434
854b0959
NTND
435int match_pathspec(const struct pathspec *ps,
436 const char *name, int namelen,
ae8d0824 437 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
438{
439 int positive, negative;
ae8d0824 440 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
42b0874a
NTND
441 positive = do_match_pathspec(ps, name, namelen,
442 prefix, seen, flags);
ef79b1f8
NTND
443 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
444 return positive;
42b0874a
NTND
445 negative = do_match_pathspec(ps, name, namelen,
446 prefix, seen,
447 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
448 return negative ? 0 : positive;
449}
450
75a6315f
BW
451/**
452 * Check if a submodule is a superset of the pathspec
453 */
454int submodule_path_match(const struct pathspec *ps,
455 const char *submodule_name,
456 char *seen)
457{
458 int matched = do_match_pathspec(ps, submodule_name,
459 strlen(submodule_name),
460 0, seen,
461 DO_MATCH_DIRECTORY |
462 DO_MATCH_SUBMODULE);
463 return matched;
464}
465
777c55a6
JH
466int report_path_error(const char *ps_matched,
467 const struct pathspec *pathspec,
468 const char *prefix)
469{
470 /*
471 * Make sure all pathspec matched; otherwise it is an error.
472 */
777c55a6
JH
473 int num, errors = 0;
474 for (num = 0; num < pathspec->nr; num++) {
475 int other, found_dup;
476
477 if (ps_matched[num])
478 continue;
479 /*
480 * The caller might have fed identical pathspec
481 * twice. Do not barf on such a mistake.
482 * FIXME: parse_pathspec should have eliminated
483 * duplicate pathspec.
484 */
485 for (found_dup = other = 0;
486 !found_dup && other < pathspec->nr;
487 other++) {
488 if (other == num || !ps_matched[other])
489 continue;
490 if (!strcmp(pathspec->items[other].original,
491 pathspec->items[num].original))
492 /*
493 * Ok, we have a match already.
494 */
495 found_dup = 1;
496 }
497 if (found_dup)
498 continue;
499
500 error("pathspec '%s' did not match any file(s) known to git.",
501 pathspec->items[num].original);
502 errors++;
503 }
777c55a6
JH
504 return errors;
505}
506
fcd631ed
NTND
507/*
508 * Return the length of the "simple" part of a path match limiter.
509 */
87323bda 510int simple_length(const char *match)
fcd631ed
NTND
511{
512 int len = -1;
513
514 for (;;) {
515 unsigned char c = *match++;
516 len++;
517 if (c == '\0' || is_glob_special(c))
518 return len;
519 }
520}
521
87323bda 522int no_wildcard(const char *string)
68492fc7 523{
fcd631ed 524 return string[simple_length(string)] == '\0';
68492fc7
LK
525}
526
82dce998
NTND
527void parse_exclude_pattern(const char **pattern,
528 int *patternlen,
f8708998 529 unsigned *flags,
82dce998 530 int *nowildcardlen)
84460eec
NTND
531{
532 const char *p = *pattern;
533 size_t i, len;
534
535 *flags = 0;
536 if (*p == '!') {
537 *flags |= EXC_FLAG_NEGATIVE;
538 p++;
539 }
540 len = strlen(p);
541 if (len && p[len - 1] == '/') {
542 len--;
543 *flags |= EXC_FLAG_MUSTBEDIR;
544 }
545 for (i = 0; i < len; i++) {
546 if (p[i] == '/')
547 break;
548 }
549 if (i == len)
550 *flags |= EXC_FLAG_NODIR;
551 *nowildcardlen = simple_length(p);
552 /*
553 * we should have excluded the trailing slash from 'p' too,
554 * but that's one more allocation. Instead just make sure
555 * nowildcardlen does not exceed real patternlen
556 */
557 if (*nowildcardlen > len)
558 *nowildcardlen = len;
559 if (*p == '*' && no_wildcard(p + 1))
560 *flags |= EXC_FLAG_ENDSWITH;
561 *pattern = p;
562 *patternlen = len;
563}
564
453ec4bd 565void add_exclude(const char *string, const char *base,
c04318e4 566 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 567{
d6b8fc30 568 struct exclude *x;
84460eec 569 int patternlen;
f8708998 570 unsigned flags;
84460eec 571 int nowildcardlen;
453ec4bd 572
84460eec
NTND
573 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
574 if (flags & EXC_FLAG_MUSTBEDIR) {
96ffc06f 575 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
d6b8fc30
JH
576 } else {
577 x = xmalloc(sizeof(*x));
578 x->pattern = string;
579 }
84460eec
NTND
580 x->patternlen = patternlen;
581 x->nowildcardlen = nowildcardlen;
453ec4bd
LT
582 x->base = base;
583 x->baselen = baselen;
d6b8fc30 584 x->flags = flags;
c04318e4 585 x->srcpos = srcpos;
840fc334
AS
586 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
587 el->excludes[el->nr++] = x;
c04318e4 588 x->el = el;
453ec4bd
LT
589}
590
55fe6f51
NTND
591static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
592 struct sha1_stat *sha1_stat)
c28b3d6e
NTND
593{
594 int pos, len;
595 unsigned long sz;
596 enum object_type type;
597 void *data;
c28b3d6e
NTND
598
599 len = strlen(path);
12cd0bf9 600 pos = index_name_pos(&the_index, path, len);
c28b3d6e
NTND
601 if (pos < 0)
602 return NULL;
12cd0bf9 603 if (!ce_skip_worktree(the_index.cache[pos]))
c28b3d6e 604 return NULL;
12cd0bf9 605 data = read_sha1_file(the_index.cache[pos]->oid.hash, &type, &sz);
c28b3d6e
NTND
606 if (!data || type != OBJ_BLOB) {
607 free(data);
608 return NULL;
609 }
610 *size = xsize_t(sz);
55fe6f51
NTND
611 if (sha1_stat) {
612 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
12cd0bf9 613 hashcpy(sha1_stat->sha1, the_index.cache[pos]->oid.hash);
55fe6f51 614 }
c28b3d6e
NTND
615 return data;
616}
617
f6198812
AS
618/*
619 * Frees memory within el which was allocated for exclude patterns and
620 * the file buffer. Does not free el itself.
621 */
622void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
623{
624 int i;
625
5cee3493 626 for (i = 0; i < el->nr; i++)
0fd0e241
NTND
627 free(el->excludes[i]);
628 free(el->excludes);
c082df24 629 free(el->filebuf);
0fd0e241 630
2653a8c6 631 memset(el, 0, sizeof(*el));
0fd0e241
NTND
632}
633
7e2e4b37 634static void trim_trailing_spaces(char *buf)
16402b99 635{
e61a6c1d
PB
636 char *p, *last_space = NULL;
637
638 for (p = buf; *p; p++)
639 switch (*p) {
640 case ' ':
641 if (!last_space)
642 last_space = p;
643 break;
644 case '\\':
645 p++;
646 if (!*p)
647 return;
648 /* fallthrough */
649 default:
650 last_space = NULL;
651 }
652
653 if (last_space)
654 *last_space = '\0';
16402b99
NTND
655}
656
0dcb8d7f
NTND
657/*
658 * Given a subdirectory name and "dir" of the current directory,
659 * search the subdir in "dir" and return it, or create a new one if it
660 * does not exist in "dir".
661 *
662 * If "name" has the trailing slash, it'll be excluded in the search.
663 */
664static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
665 struct untracked_cache_dir *dir,
666 const char *name, int len)
667{
668 int first, last;
669 struct untracked_cache_dir *d;
670 if (!dir)
671 return NULL;
672 if (len && name[len - 1] == '/')
673 len--;
674 first = 0;
675 last = dir->dirs_nr;
676 while (last > first) {
677 int cmp, next = (last + first) >> 1;
678 d = dir->dirs[next];
679 cmp = strncmp(name, d->name, len);
680 if (!cmp && strlen(d->name) > len)
681 cmp = -1;
682 if (!cmp)
683 return d;
684 if (cmp < 0) {
685 last = next;
686 continue;
687 }
688 first = next+1;
689 }
690
691 uc->dir_created++;
96ffc06f 692 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
693
694 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
695 memmove(dir->dirs + first + 1, dir->dirs + first,
696 (dir->dirs_nr - first) * sizeof(*dir->dirs));
697 dir->dirs_nr++;
698 dir->dirs[first] = d;
699 return d;
700}
701
ccad261f
NTND
702static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
703{
704 int i;
705 dir->valid = 0;
706 dir->untracked_nr = 0;
707 for (i = 0; i < dir->dirs_nr; i++)
708 do_invalidate_gitignore(dir->dirs[i]);
709}
710
711static void invalidate_gitignore(struct untracked_cache *uc,
712 struct untracked_cache_dir *dir)
713{
714 uc->gitignore_invalidated++;
715 do_invalidate_gitignore(dir);
716}
717
91a2288b
NTND
718static void invalidate_directory(struct untracked_cache *uc,
719 struct untracked_cache_dir *dir)
720{
26cb0182 721 int i;
91a2288b
NTND
722 uc->dir_invalidated++;
723 dir->valid = 0;
724 dir->untracked_nr = 0;
26cb0182
NTND
725 for (i = 0; i < dir->dirs_nr; i++)
726 dir->dirs[i]->recurse = 0;
91a2288b
NTND
727}
728
55fe6f51
NTND
729/*
730 * Given a file with name "fname", read it (either from disk, or from
731 * the index if "check_index" is non-zero), parse it and store the
732 * exclude rules in "el".
733 *
734 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
735 * stat data from disk (only valid if add_excludes returns zero). If
736 * ss_valid is non-zero, "ss" must contain good value as input.
737 */
738static int add_excludes(const char *fname, const char *base, int baselen,
739 struct exclude_list *el, int check_index,
740 struct sha1_stat *sha1_stat)
453ec4bd 741{
c470701a 742 struct stat st;
c04318e4 743 int fd, i, lineno = 1;
9d14017a 744 size_t size = 0;
453ec4bd
LT
745 char *buf, *entry;
746
747 fd = open(fname, O_RDONLY);
c28b3d6e 748 if (fd < 0 || fstat(fd, &st) < 0) {
69660731 749 if (errno != ENOENT)
55b38a48 750 warn_on_inaccessible(fname);
c28b3d6e
NTND
751 if (0 <= fd)
752 close(fd);
753 if (!check_index ||
55fe6f51 754 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
c28b3d6e 755 return -1;
45d76f17
NTND
756 if (size == 0) {
757 free(buf);
758 return 0;
759 }
760 if (buf[size-1] != '\n') {
50a6c8ef 761 buf = xrealloc(buf, st_add(size, 1));
45d76f17
NTND
762 buf[size++] = '\n';
763 }
d961baa8 764 } else {
c28b3d6e
NTND
765 size = xsize_t(st.st_size);
766 if (size == 0) {
55fe6f51
NTND
767 if (sha1_stat) {
768 fill_stat_data(&sha1_stat->stat, &st);
769 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
770 sha1_stat->valid = 1;
771 }
c28b3d6e
NTND
772 close(fd);
773 return 0;
774 }
3733e694 775 buf = xmallocz(size);
c28b3d6e 776 if (read_in_full(fd, buf, size) != size) {
45d76f17 777 free(buf);
c28b3d6e
NTND
778 close(fd);
779 return -1;
780 }
45d76f17 781 buf[size++] = '\n';
c28b3d6e 782 close(fd);
55fe6f51
NTND
783 if (sha1_stat) {
784 int pos;
785 if (sha1_stat->valid &&
ed4efab1 786 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st))
55fe6f51
NTND
787 ; /* no content change, ss->sha1 still good */
788 else if (check_index &&
12cd0bf9
BW
789 (pos = index_name_pos(&the_index, fname, strlen(fname))) >= 0 &&
790 !ce_stage(the_index.cache[pos]) &&
791 ce_uptodate(the_index.cache[pos]) &&
55fe6f51 792 !would_convert_to_git(fname))
99d1a986 793 hashcpy(sha1_stat->sha1,
12cd0bf9 794 the_index.cache[pos]->oid.hash);
55fe6f51
NTND
795 else
796 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
797 fill_stat_data(&sha1_stat->stat, &st);
798 sha1_stat->valid = 1;
799 }
6ba78238 800 }
453ec4bd 801
c082df24 802 el->filebuf = buf;
245e1c19 803
dde843e7
JH
804 if (skip_utf8_bom(&buf, size))
805 size -= buf - el->filebuf;
806
453ec4bd 807 entry = buf;
245e1c19 808
45d76f17
NTND
809 for (i = 0; i < size; i++) {
810 if (buf[i] == '\n') {
453ec4bd
LT
811 if (entry != buf + i && entry[0] != '#') {
812 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 813 trim_trailing_spaces(entry);
c04318e4 814 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 815 }
c04318e4 816 lineno++;
453ec4bd
LT
817 entry = buf + i + 1;
818 }
819 }
820 return 0;
453ec4bd
LT
821}
822
55fe6f51
NTND
823int add_excludes_from_file_to_list(const char *fname, const char *base,
824 int baselen, struct exclude_list *el,
825 int check_index)
826{
827 return add_excludes(fname, base, baselen, el, check_index, NULL);
828}
829
c04318e4
AS
830struct exclude_list *add_exclude_list(struct dir_struct *dir,
831 int group_type, const char *src)
c082df24
AS
832{
833 struct exclude_list *el;
834 struct exclude_list_group *group;
835
836 group = &dir->exclude_list_group[group_type];
837 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
838 el = &group->el[group->nr++];
839 memset(el, 0, sizeof(*el));
c04318e4 840 el->src = src;
c082df24
AS
841 return el;
842}
843
844/*
845 * Used to set up core.excludesfile and .git/info/exclude lists.
846 */
0dcb8d7f
NTND
847static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
848 struct sha1_stat *sha1_stat)
453ec4bd 849{
c082df24 850 struct exclude_list *el;
ccad261f
NTND
851 /*
852 * catch setup_standard_excludes() that's called before
853 * dir->untracked is assigned. That function behaves
854 * differently when dir->untracked is non-NULL.
855 */
856 if (!dir->untracked)
857 dir->unmanaged_exclude_files++;
c04318e4 858 el = add_exclude_list(dir, EXC_FILE, fname);
0dcb8d7f 859 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0)
453ec4bd
LT
860 die("cannot use %s as an exclude file", fname);
861}
862
0dcb8d7f
NTND
863void add_excludes_from_file(struct dir_struct *dir, const char *fname)
864{
ccad261f 865 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
866 add_excludes_from_file_1(dir, fname, NULL);
867}
868
82dce998
NTND
869int match_basename(const char *basename, int basenamelen,
870 const char *pattern, int prefix, int patternlen,
f8708998 871 unsigned flags)
593cb880
NTND
872{
873 if (prefix == patternlen) {
0b6e56df 874 if (patternlen == basenamelen &&
ba0897e6 875 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
876 return 1;
877 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 878 /* "*literal" matching against "fooliteral" */
593cb880 879 if (patternlen - 1 <= basenamelen &&
ba0897e6 880 !fspathncmp(pattern + 1,
0b6e56df
JH
881 basename + basenamelen - (patternlen - 1),
882 patternlen - 1))
593cb880
NTND
883 return 1;
884 } else {
0b6e56df
JH
885 if (fnmatch_icase_mem(pattern, patternlen,
886 basename, basenamelen,
887 0) == 0)
593cb880
NTND
888 return 1;
889 }
890 return 0;
891}
892
82dce998
NTND
893int match_pathname(const char *pathname, int pathlen,
894 const char *base, int baselen,
895 const char *pattern, int prefix, int patternlen,
f8708998 896 unsigned flags)
b5592632
NTND
897{
898 const char *name;
899 int namelen;
900
901 /*
902 * match with FNM_PATHNAME; the pattern has base implicitly
903 * in front of it.
904 */
905 if (*pattern == '/') {
906 pattern++;
982ac873 907 patternlen--;
b5592632
NTND
908 prefix--;
909 }
910
911 /*
912 * baselen does not count the trailing slash. base[] may or
913 * may not end with a trailing slash though.
914 */
915 if (pathlen < baselen + 1 ||
916 (baselen && pathname[baselen] != '/') ||
ba0897e6 917 fspathncmp(pathname, base, baselen))
b5592632
NTND
918 return 0;
919
920 namelen = baselen ? pathlen - baselen - 1 : pathlen;
921 name = pathname + pathlen - namelen;
922
923 if (prefix) {
924 /*
925 * if the non-wildcard part is longer than the
926 * remaining pathname, surely it cannot match.
927 */
928 if (prefix > namelen)
929 return 0;
930
ba0897e6 931 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
932 return 0;
933 pattern += prefix;
ab3aebc1 934 patternlen -= prefix;
b5592632
NTND
935 name += prefix;
936 namelen -= prefix;
ab3aebc1
JK
937
938 /*
939 * If the whole pattern did not have a wildcard,
940 * then our prefix match is all we need; we
941 * do not need to call fnmatch at all.
942 */
5cee3493 943 if (!patternlen && !namelen)
ab3aebc1 944 return 1;
b5592632
NTND
945 }
946
ab3aebc1
JK
947 return fnmatch_icase_mem(pattern, patternlen,
948 name, namelen,
f30366b2 949 WM_PATHNAME) == 0;
b5592632
NTND
950}
951
578cd7c3
AS
952/*
953 * Scan the given exclude list in reverse to see whether pathname
954 * should be ignored. The first match (i.e. the last on the list), if
955 * any, determines the fate. Returns the exclude_list element which
956 * matched, or NULL for undecided.
453ec4bd 957 */
578cd7c3
AS
958static struct exclude *last_exclude_matching_from_list(const char *pathname,
959 int pathlen,
960 const char *basename,
961 int *dtype,
962 struct exclude_list *el)
453ec4bd 963{
e6efecc4 964 struct exclude *exc = NULL; /* undecided */
5cee3493 965 int i;
453ec4bd 966
35a94d44 967 if (!el->nr)
578cd7c3 968 return NULL; /* undefined */
d6b8fc30 969
35a94d44
NTND
970 for (i = el->nr - 1; 0 <= i; i--) {
971 struct exclude *x = el->excludes[i];
b5592632 972 const char *exclude = x->pattern;
b5592632 973 int prefix = x->nowildcardlen;
35a94d44
NTND
974
975 if (x->flags & EXC_FLAG_MUSTBEDIR) {
976 if (*dtype == DT_UNKNOWN)
977 *dtype = get_dtype(NULL, pathname, pathlen);
978 if (*dtype != DT_DIR)
979 continue;
980 }
d6b8fc30 981
35a94d44 982 if (x->flags & EXC_FLAG_NODIR) {
593cb880
NTND
983 if (match_basename(basename,
984 pathlen - (basename - pathname),
985 exclude, prefix, x->patternlen,
e6efecc4
NTND
986 x->flags)) {
987 exc = x;
988 break;
989 }
35a94d44
NTND
990 continue;
991 }
992
b5592632
NTND
993 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
994 if (match_pathname(pathname, pathlen,
995 x->base, x->baselen ? x->baselen - 1 : 0,
e6efecc4
NTND
996 exclude, prefix, x->patternlen, x->flags)) {
997 exc = x;
998 break;
999 }
453ec4bd 1000 }
e6efecc4 1001 return exc;
578cd7c3
AS
1002}
1003
1004/*
1005 * Scan the list and let the last match determine the fate.
1006 * Return 1 for exclude, 0 for include and -1 for undecided.
1007 */
1008int is_excluded_from_list(const char *pathname,
1009 int pathlen, const char *basename, int *dtype,
1010 struct exclude_list *el)
1011{
1012 struct exclude *exclude;
1013 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);
1014 if (exclude)
1015 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1016 return -1; /* undecided */
1017}
1018
46aa2f95
KB
1019static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
1020 const char *pathname, int pathlen, const char *basename,
1021 int *dtype_p)
1022{
1023 int i, j;
1024 struct exclude_list_group *group;
1025 struct exclude *exclude;
1026 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
1027 group = &dir->exclude_list_group[i];
1028 for (j = group->nr - 1; j >= 0; j--) {
1029 exclude = last_exclude_matching_from_list(
1030 pathname, pathlen, basename, dtype_p,
1031 &group->el[j]);
1032 if (exclude)
1033 return exclude;
1034 }
1035 }
1036 return NULL;
1037}
1038
6cd5c582
KB
1039/*
1040 * Loads the per-directory exclude list for the substring of base
1041 * which has a char length of baselen.
1042 */
1043static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
1044{
1045 struct exclude_list_group *group;
1046 struct exclude_list *el;
1047 struct exclude_stack *stk = NULL;
0dcb8d7f 1048 struct untracked_cache_dir *untracked;
6cd5c582
KB
1049 int current;
1050
6cd5c582
KB
1051 group = &dir->exclude_list_group[EXC_DIRS];
1052
d961baa8
NTND
1053 /*
1054 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 1055 * which originate from directories not in the prefix of the
d961baa8
NTND
1056 * path being checked.
1057 */
6cd5c582
KB
1058 while ((stk = dir->exclude_stack) != NULL) {
1059 if (stk->baselen <= baselen &&
aceb9429 1060 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
1061 break;
1062 el = &group->el[dir->exclude_stack->exclude_ix];
1063 dir->exclude_stack = stk->prev;
95c6f271 1064 dir->exclude = NULL;
aceb9429 1065 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
1066 clear_exclude_list(el);
1067 free(stk);
1068 group->nr--;
1069 }
1070
95c6f271
KB
1071 /* Skip traversing into sub directories if the parent is excluded */
1072 if (dir->exclude)
1073 return;
1074
aceb9429
NTND
1075 /*
1076 * Lazy initialization. All call sites currently just
1077 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1078 * them seems lots of work for little benefit.
1079 */
1080 if (!dir->basebuf.buf)
1081 strbuf_init(&dir->basebuf, PATH_MAX);
1082
6cd5c582
KB
1083 /* Read from the parent directories and push them down. */
1084 current = stk ? stk->baselen : -1;
aceb9429 1085 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1086 if (dir->untracked)
1087 untracked = stk ? stk->ucd : dir->untracked->root;
1088 else
1089 untracked = NULL;
1090
6cd5c582 1091 while (current < baselen) {
6cd5c582 1092 const char *cp;
0dcb8d7f 1093 struct sha1_stat sha1_stat;
6cd5c582 1094
03e11a71 1095 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1096 if (current < 0) {
1097 cp = base;
1098 current = 0;
d961baa8 1099 } else {
6cd5c582
KB
1100 cp = strchr(base + current + 1, '/');
1101 if (!cp)
1102 die("oops in prep_exclude");
1103 cp++;
0dcb8d7f
NTND
1104 untracked =
1105 lookup_untracked(dir->untracked, untracked,
1106 base + current,
1107 cp - base - current);
6cd5c582
KB
1108 }
1109 stk->prev = dir->exclude_stack;
1110 stk->baselen = cp - base;
95c6f271 1111 stk->exclude_ix = group->nr;
0dcb8d7f 1112 stk->ucd = untracked;
95c6f271 1113 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1114 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1115 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1116
1117 /* Abort if the directory is excluded */
1118 if (stk->baselen) {
1119 int dt = DT_DIR;
aceb9429 1120 dir->basebuf.buf[stk->baselen - 1] = 0;
95c6f271 1121 dir->exclude = last_exclude_matching_from_lists(dir,
aceb9429
NTND
1122 dir->basebuf.buf, stk->baselen - 1,
1123 dir->basebuf.buf + current, &dt);
1124 dir->basebuf.buf[stk->baselen - 1] = '/';
c3c327de
KB
1125 if (dir->exclude &&
1126 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1127 dir->exclude = NULL;
95c6f271 1128 if (dir->exclude) {
95c6f271
KB
1129 dir->exclude_stack = stk;
1130 return;
1131 }
1132 }
1133
aceb9429 1134 /* Try to read per-directory file */
0dcb8d7f
NTND
1135 hashclr(sha1_stat.sha1);
1136 sha1_stat.valid = 0;
27b099ae
NTND
1137 if (dir->exclude_per_dir &&
1138 /*
1139 * If we know that no files have been added in
1140 * this directory (i.e. valid_cached_dir() has
1141 * been executed and set untracked->valid) ..
1142 */
1143 (!untracked || !untracked->valid ||
1144 /*
1145 * .. and .gitignore does not exist before
7687252f
DT
1146 * (i.e. null exclude_sha1). Then we can skip
1147 * loading .gitignore, which would result in
1148 * ENOENT anyway.
27b099ae
NTND
1149 */
1150 !is_null_sha1(untracked->exclude_sha1))) {
95c6f271
KB
1151 /*
1152 * dir->basebuf gets reused by the traversal, but we
1153 * need fname to remain unchanged to ensure the src
1154 * member of each struct exclude correctly
1155 * back-references its source file. Other invocations
1156 * of add_exclude_list provide stable strings, so we
aceb9429 1157 * strbuf_detach() and free() here in the caller.
95c6f271 1158 */
aceb9429
NTND
1159 struct strbuf sb = STRBUF_INIT;
1160 strbuf_addbuf(&sb, &dir->basebuf);
1161 strbuf_addstr(&sb, dir->exclude_per_dir);
1162 el->src = strbuf_detach(&sb, NULL);
0dcb8d7f
NTND
1163 add_excludes(el->src, el->src, stk->baselen, el, 1,
1164 untracked ? &sha1_stat : NULL);
1165 }
5ebf79ad
NTND
1166 /*
1167 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1168 * will first be called in valid_cached_dir() then maybe many
1169 * times more in last_exclude_matching(). When the cache is
1170 * used, last_exclude_matching() will not be called and
1171 * reading .gitignore content will be a waste.
1172 *
1173 * So when it's called by valid_cached_dir() and we can get
1174 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1175 * modified on work tree), we could delay reading the
1176 * .gitignore content until we absolutely need it in
1177 * last_exclude_matching(). Be careful about ignore rule
1178 * order, though, if you do that.
1179 */
1180 if (untracked &&
1181 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1182 invalidate_gitignore(dir->untracked, untracked);
0dcb8d7f 1183 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
95c6f271 1184 }
6cd5c582
KB
1185 dir->exclude_stack = stk;
1186 current = stk->baselen;
1187 }
aceb9429 1188 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1189}
1190
f4cd69a6
AS
1191/*
1192 * Loads the exclude lists for the directory containing pathname, then
1193 * scans all exclude lists to determine whether pathname is excluded.
1194 * Returns the exclude_list element which matched, or NULL for
1195 * undecided.
1196 */
b07bc8c8 1197struct exclude *last_exclude_matching(struct dir_struct *dir,
f4cd69a6
AS
1198 const char *pathname,
1199 int *dtype_p)
453ec4bd
LT
1200{
1201 int pathlen = strlen(pathname);
68492fc7
LK
1202 const char *basename = strrchr(pathname, '/');
1203 basename = (basename) ? basename+1 : pathname;
453ec4bd 1204
63d285c8 1205 prep_exclude(dir, pathname, basename-pathname);
c082df24 1206
95c6f271
KB
1207 if (dir->exclude)
1208 return dir->exclude;
1209
46aa2f95
KB
1210 return last_exclude_matching_from_lists(dir, pathname, pathlen,
1211 basename, dtype_p);
f4cd69a6
AS
1212}
1213
1214/*
1215 * Loads the exclude lists for the directory containing pathname, then
1216 * scans all exclude lists to determine whether pathname is excluded.
1217 * Returns 1 if true, otherwise 0.
1218 */
b07bc8c8 1219int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
f4cd69a6
AS
1220{
1221 struct exclude *exclude =
1222 last_exclude_matching(dir, pathname, dtype_p);
1223 if (exclude)
1224 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1225 return 0;
1226}
1227
f3fa1838
JH
1228static struct dir_entry *dir_entry_new(const char *pathname, int len)
1229{
453ec4bd
LT
1230 struct dir_entry *ent;
1231
96ffc06f 1232 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1233 ent->len = len;
4d06f8ac 1234 return ent;
453ec4bd
LT
1235}
1236
159b3212 1237static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
6815e569 1238{
12cd0bf9 1239 if (index_file_exists(&the_index, pathname, len, ignore_case))
6815e569
JK
1240 return NULL;
1241
25fd2f7a 1242 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1243 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1244}
1245
108da0db 1246struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)
2abd31b0 1247{
12cd0bf9 1248 if (!index_name_is_other(&the_index, pathname, len))
2abd31b0
JK
1249 return NULL;
1250
25fd2f7a 1251 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1252 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1253}
1254
09595258
LT
1255enum exist_status {
1256 index_nonexistent = 0,
1257 index_directory,
4b05548f 1258 index_gitdir
09595258
LT
1259};
1260
5102c617 1261/*
71261027 1262 * Do not use the alphabetically sorted index to look up
5102c617 1263 * the directory name; instead, use the case insensitive
ebbd7439 1264 * directory hash.
5102c617
JJ
1265 */
1266static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
1267{
41284eb0 1268 struct cache_entry *ce;
5102c617 1269
12cd0bf9 1270 if (index_dir_exists(&the_index, dirname, len))
5102c617
JJ
1271 return index_directory;
1272
12cd0bf9 1273 ce = index_file_exists(&the_index, dirname, len, ignore_case);
41284eb0 1274 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1275 return index_gitdir;
1276
5102c617
JJ
1277 return index_nonexistent;
1278}
1279
09595258
LT
1280/*
1281 * The index sorts alphabetically by entry name, which
1282 * means that a gitlink sorts as '\0' at the end, while
1283 * a directory (which is defined not as an entry, but as
1284 * the files it contains) will sort with the '/' at the
1285 * end.
1286 */
1287static enum exist_status directory_exists_in_index(const char *dirname, int len)
453ec4bd 1288{
5102c617
JJ
1289 int pos;
1290
1291 if (ignore_case)
1292 return directory_exists_in_index_icase(dirname, len);
1293
12cd0bf9 1294 pos = index_name_pos(&the_index, dirname, len);
09595258
LT
1295 if (pos < 0)
1296 pos = -pos-1;
12cd0bf9
BW
1297 while (pos < the_index.cache_nr) {
1298 const struct cache_entry *ce = the_index.cache[pos++];
09595258
LT
1299 unsigned char endchar;
1300
1301 if (strncmp(ce->name, dirname, len))
1302 break;
1303 endchar = ce->name[len];
1304 if (endchar > '/')
1305 break;
1306 if (endchar == '/')
1307 return index_directory;
7a51ed66 1308 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1309 return index_gitdir;
1310 }
1311 return index_nonexistent;
1312}
1313
1314/*
1315 * When we find a directory when traversing the filesystem, we
1316 * have three distinct cases:
1317 *
1318 * - ignore it
1319 * - see it as a directory
1320 * - recurse into it
1321 *
1322 * and which one we choose depends on a combination of existing
1323 * git index contents and the flags passed into the directory
1324 * traversal routine.
1325 *
1326 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1327 * directory name, we always recurse into the directory to see
1328 * all the files.
09595258
LT
1329 *
1330 * Case 2: If we *already* have that directory name as a gitlink,
1331 * we always continue to see it as a gitlink, regardless of whether
1332 * there is an actual git directory there or not (it might not
1333 * be checked out as a subproject!)
1334 *
1335 * Case 3: if we didn't have it in the index previously, we
1336 * have a few sub-cases:
1337 *
1338 * (a) if "show_other_directories" is true, we show it as
1339 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1340 * also true, in which case we need to check if it contains any
1341 * untracked and / or ignored files.
09595258 1342 * (b) if it looks like a git directory, and we don't have
302b9282 1343 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1344 * as a directory.
1345 * (c) otherwise, we recurse into it.
1346 */
defd7c7b 1347static enum path_treatment treat_directory(struct dir_struct *dir,
0dcb8d7f 1348 struct untracked_cache_dir *untracked,
2e5910f2 1349 const char *dirname, int len, int baselen, int exclude,
e1b8c7bd 1350 const struct pathspec *pathspec)
09595258
LT
1351{
1352 /* The "len-1" is to strip the final '/' */
1353 switch (directory_exists_in_index(dirname, len-1)) {
1354 case index_directory:
defd7c7b 1355 return path_recurse;
09595258
LT
1356
1357 case index_gitdir:
26c986e1 1358 return path_none;
09595258
LT
1359
1360 case index_nonexistent:
7c4c97c0 1361 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1362 break;
7c4c97c0 1363 if (!(dir->flags & DIR_NO_GITLINKS)) {
09595258
LT
1364 unsigned char sha1[20];
1365 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
defd7c7b 1366 return path_untracked;
09595258 1367 }
defd7c7b 1368 return path_recurse;
09595258
LT
1369 }
1370
1371 /* This is the "show_other_directories" case */
721ac4ed 1372
184d2a8e 1373 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1374 return exclude ? path_excluded : path_untracked;
1375
2e5910f2
DT
1376 untracked = lookup_untracked(dir->untracked, untracked,
1377 dirname + baselen, len - baselen);
0dcb8d7f 1378 return read_directory_recursive(dir, dirname, len,
e1b8c7bd 1379 untracked, 1, pathspec);
453ec4bd
LT
1380}
1381
9fc42d60
LT
1382/*
1383 * This is an inexact early pruning of any recursive directory
1384 * reading - if the path cannot possibly be in the pathspec,
1385 * return true, and we'll skip it early.
1386 */
e1b8c7bd
BW
1387static int simplify_away(const char *path, int pathlen,
1388 const struct pathspec *pathspec)
9fc42d60 1389{
e1b8c7bd 1390 int i;
9fc42d60 1391
e1b8c7bd
BW
1392 if (!pathspec || !pathspec->nr)
1393 return 0;
1394
1395 GUARD_PATHSPEC(pathspec,
1396 PATHSPEC_FROMTOP |
1397 PATHSPEC_MAXDEPTH |
1398 PATHSPEC_LITERAL |
1399 PATHSPEC_GLOB |
1400 PATHSPEC_ICASE |
b0db7046
BW
1401 PATHSPEC_EXCLUDE |
1402 PATHSPEC_ATTR);
e1b8c7bd
BW
1403
1404 for (i = 0; i < pathspec->nr; i++) {
1405 const struct pathspec_item *item = &pathspec->items[i];
1406 int len = item->nowildcard_len;
1407
1408 if (len > pathlen)
1409 len = pathlen;
1410 if (!ps_strncmp(item, item->match, path, len))
1411 return 0;
9fc42d60 1412 }
e1b8c7bd
BW
1413
1414 return 1;
9fc42d60
LT
1415}
1416
29209cbe
JK
1417/*
1418 * This function tells us whether an excluded path matches a
1419 * list of "interesting" pathspecs. That is, whether a path matched
1420 * by any of the pathspecs could possibly be ignored by excluding
1421 * the specified path. This can happen if:
1422 *
1423 * 1. the path is mentioned explicitly in the pathspec
1424 *
1425 * 2. the path is a directory prefix of some element in the
1426 * pathspec
1427 */
e1b8c7bd
BW
1428static int exclude_matches_pathspec(const char *path, int pathlen,
1429 const struct pathspec *pathspec)
1430{
1431 int i;
1432
1433 if (!pathspec || !pathspec->nr)
1434 return 0;
1435
1436 GUARD_PATHSPEC(pathspec,
1437 PATHSPEC_FROMTOP |
1438 PATHSPEC_MAXDEPTH |
1439 PATHSPEC_LITERAL |
1440 PATHSPEC_GLOB |
1441 PATHSPEC_ICASE |
1442 PATHSPEC_EXCLUDE);
1443
1444 for (i = 0; i < pathspec->nr; i++) {
1445 const struct pathspec_item *item = &pathspec->items[i];
1446 int len = item->nowildcard_len;
1447
1448 if (len == pathlen &&
1449 !ps_strncmp(item, item->match, path, pathlen))
1450 return 1;
1451 if (len > pathlen &&
1452 item->match[pathlen] == '/' &&
1453 !ps_strncmp(item, item->match, path, pathlen))
1454 return 1;
e96980ef
JK
1455 }
1456 return 0;
1457}
1458
443e061a
LT
1459static int get_index_dtype(const char *path, int len)
1460{
1461 int pos;
9c5e6c80 1462 const struct cache_entry *ce;
443e061a 1463
12cd0bf9 1464 ce = index_file_exists(&the_index, path, len, 0);
443e061a
LT
1465 if (ce) {
1466 if (!ce_uptodate(ce))
1467 return DT_UNKNOWN;
1468 if (S_ISGITLINK(ce->ce_mode))
1469 return DT_DIR;
1470 /*
1471 * Nobody actually cares about the
1472 * difference between DT_LNK and DT_REG
1473 */
1474 return DT_REG;
1475 }
1476
1477 /* Try to look it up as a directory */
12cd0bf9 1478 pos = index_name_pos(&the_index, path, len);
443e061a
LT
1479 if (pos >= 0)
1480 return DT_UNKNOWN;
1481 pos = -pos-1;
12cd0bf9
BW
1482 while (pos < the_index.cache_nr) {
1483 ce = the_index.cache[pos++];
443e061a
LT
1484 if (strncmp(ce->name, path, len))
1485 break;
1486 if (ce->name[len] > '/')
1487 break;
1488 if (ce->name[len] < '/')
1489 continue;
1490 if (!ce_uptodate(ce))
1491 break; /* continue? */
1492 return DT_DIR;
1493 }
1494 return DT_UNKNOWN;
1495}
1496
caa6b782 1497static int get_dtype(struct dirent *de, const char *path, int len)
07134421 1498{
6831a88a 1499 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1500 struct stat st;
1501
1502 if (dtype != DT_UNKNOWN)
1503 return dtype;
443e061a
LT
1504 dtype = get_index_dtype(path, len);
1505 if (dtype != DT_UNKNOWN)
1506 return dtype;
1507 if (lstat(path, &st))
07134421
LT
1508 return dtype;
1509 if (S_ISREG(st.st_mode))
1510 return DT_REG;
1511 if (S_ISDIR(st.st_mode))
1512 return DT_DIR;
1513 if (S_ISLNK(st.st_mode))
1514 return DT_LNK;
1515 return dtype;
1516}
1517
16e2cfa9 1518static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1519 struct untracked_cache_dir *untracked,
49dc2cc2 1520 struct strbuf *path,
2e5910f2 1521 int baselen,
e1b8c7bd 1522 const struct pathspec *pathspec,
16e2cfa9 1523 int dtype, struct dirent *de)
53cc5356 1524{
8aaf8d77 1525 int exclude;
12cd0bf9 1526 int has_path_in_index = !!index_file_exists(&the_index, path->buf, path->len, ignore_case);
2eac2a4c 1527
8aaf8d77
KB
1528 if (dtype == DT_UNKNOWN)
1529 dtype = get_dtype(de, path->buf, path->len);
1530
1531 /* Always exclude indexed files */
2eac2a4c 1532 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1533 return path_none;
8aaf8d77 1534
2eac2a4c
JH
1535 /*
1536 * When we are looking at a directory P in the working tree,
1537 * there are three cases:
1538 *
1539 * (1) P exists in the index. Everything inside the directory P in
1540 * the working tree needs to go when P is checked out from the
1541 * index.
1542 *
1543 * (2) P does not exist in the index, but there is P/Q in the index.
1544 * We know P will stay a directory when we check out the contents
1545 * of the index, but we do not know yet if there is a directory
1546 * P/Q in the working tree to be killed, so we need to recurse.
1547 *
1548 * (3) P does not exist in the index, and there is no P/Q in the index
1549 * to require P to be a directory, either. Only in this case, we
1550 * know that everything inside P will not be killed without
1551 * recursing.
1552 */
1553 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1554 (dtype == DT_DIR) &&
de372b1b
ES
1555 !has_path_in_index &&
1556 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))
1557 return path_none;
8aaf8d77
KB
1558
1559 exclude = is_excluded(dir, path->buf, &dtype);
53cc5356
JH
1560
1561 /*
1562 * Excluded? If we don't explicitly want to show
1563 * ignored files, ignore it
1564 */
0aaf62b6 1565 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1566 return path_excluded;
53cc5356 1567
53cc5356
JH
1568 switch (dtype) {
1569 default:
defd7c7b 1570 return path_none;
53cc5356 1571 case DT_DIR:
49dc2cc2 1572 strbuf_addch(path, '/');
2e5910f2 1573 return treat_directory(dir, untracked, path->buf, path->len,
e1b8c7bd 1574 baselen, exclude, pathspec);
53cc5356
JH
1575 case DT_REG:
1576 case DT_LNK:
defd7c7b 1577 return exclude ? path_excluded : path_untracked;
53cc5356 1578 }
53cc5356
JH
1579}
1580
91a2288b
NTND
1581static enum path_treatment treat_path_fast(struct dir_struct *dir,
1582 struct untracked_cache_dir *untracked,
1583 struct cached_dir *cdir,
1584 struct strbuf *path,
1585 int baselen,
e1b8c7bd 1586 const struct pathspec *pathspec)
91a2288b
NTND
1587{
1588 strbuf_setlen(path, baselen);
1589 if (!cdir->ucd) {
1590 strbuf_addstr(path, cdir->file);
1591 return path_untracked;
1592 }
1593 strbuf_addstr(path, cdir->ucd->name);
1594 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1595 strbuf_complete(path, '/');
91a2288b
NTND
1596 if (cdir->ucd->check_only)
1597 /*
1598 * check_only is set as a result of treat_directory() getting
1599 * to its bottom. Verify again the same set of directories
1600 * with check_only set.
1601 */
1602 return read_directory_recursive(dir, path->buf, path->len,
e1b8c7bd 1603 cdir->ucd, 1, pathspec);
91a2288b
NTND
1604 /*
1605 * We get path_recurse in the first run when
1606 * directory_exists_in_index() returns index_nonexistent. We
1607 * are sure that new changes in the index does not impact the
1608 * outcome. Return now.
1609 */
1610 return path_recurse;
1611}
1612
16e2cfa9 1613static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1614 struct untracked_cache_dir *untracked,
cf7c6148 1615 struct cached_dir *cdir,
49dc2cc2 1616 struct strbuf *path,
16e2cfa9 1617 int baselen,
e1b8c7bd 1618 const struct pathspec *pathspec)
16e2cfa9
JH
1619{
1620 int dtype;
cf7c6148 1621 struct dirent *de = cdir->de;
16e2cfa9 1622
91a2288b
NTND
1623 if (!de)
1624 return treat_path_fast(dir, untracked, cdir, path,
e1b8c7bd 1625 baselen, pathspec);
16e2cfa9 1626 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
defd7c7b 1627 return path_none;
49dc2cc2
RS
1628 strbuf_setlen(path, baselen);
1629 strbuf_addstr(path, de->d_name);
e1b8c7bd 1630 if (simplify_away(path->buf, path->len, pathspec))
defd7c7b 1631 return path_none;
16e2cfa9
JH
1632
1633 dtype = DTYPE(de);
e1b8c7bd 1634 return treat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);
0dcb8d7f
NTND
1635}
1636
1637static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1638{
1639 if (!dir)
1640 return;
1641 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1642 dir->untracked_alloc);
1643 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1644}
1645
91a2288b
NTND
1646static int valid_cached_dir(struct dir_struct *dir,
1647 struct untracked_cache_dir *untracked,
1648 struct strbuf *path,
1649 int check_only)
1650{
1651 struct stat st;
1652
1653 if (!untracked)
1654 return 0;
1655
1656 if (stat(path->len ? path->buf : ".", &st)) {
1657 invalidate_directory(dir->untracked, untracked);
1658 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1659 return 0;
1660 }
1661 if (!untracked->valid ||
ed4efab1 1662 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {
91a2288b
NTND
1663 if (untracked->valid)
1664 invalidate_directory(dir->untracked, untracked);
1665 fill_stat_data(&untracked->stat_data, &st);
1666 return 0;
1667 }
1668
1669 if (untracked->check_only != !!check_only) {
1670 invalidate_directory(dir->untracked, untracked);
1671 return 0;
1672 }
1673
1674 /*
1675 * prep_exclude will be called eventually on this directory,
1676 * but it's called much later in last_exclude_matching(). We
1677 * need it now to determine the validity of the cache for this
1678 * path. The next calls will be nearly no-op, the way
1679 * prep_exclude() is designed.
1680 */
1681 if (path->len && path->buf[path->len - 1] != '/') {
1682 strbuf_addch(path, '/');
1683 prep_exclude(dir, path->buf, path->len);
1684 strbuf_setlen(path, path->len - 1);
1685 } else
1686 prep_exclude(dir, path->buf, path->len);
1687
1688 /* hopefully prep_exclude() haven't invalidated this entry... */
1689 return untracked->valid;
1690}
1691
cf7c6148
NTND
1692static int open_cached_dir(struct cached_dir *cdir,
1693 struct dir_struct *dir,
1694 struct untracked_cache_dir *untracked,
1695 struct strbuf *path,
1696 int check_only)
1697{
1698 memset(cdir, 0, sizeof(*cdir));
1699 cdir->untracked = untracked;
91a2288b
NTND
1700 if (valid_cached_dir(dir, untracked, path, check_only))
1701 return 0;
cf7c6148 1702 cdir->fdir = opendir(path->len ? path->buf : ".");
91a2288b
NTND
1703 if (dir->untracked)
1704 dir->untracked->dir_opened++;
cf7c6148
NTND
1705 if (!cdir->fdir)
1706 return -1;
1707 return 0;
1708}
1709
1710static int read_cached_dir(struct cached_dir *cdir)
1711{
1712 if (cdir->fdir) {
1713 cdir->de = readdir(cdir->fdir);
1714 if (!cdir->de)
1715 return -1;
1716 return 0;
1717 }
91a2288b
NTND
1718 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1719 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1720 if (!d->recurse) {
1721 cdir->nr_dirs++;
1722 continue;
1723 }
91a2288b
NTND
1724 cdir->ucd = d;
1725 cdir->nr_dirs++;
1726 return 0;
1727 }
1728 cdir->ucd = NULL;
1729 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1730 struct untracked_cache_dir *d = cdir->untracked;
1731 cdir->file = d->untracked[cdir->nr_files++];
1732 return 0;
1733 }
cf7c6148
NTND
1734 return -1;
1735}
1736
1737static void close_cached_dir(struct cached_dir *cdir)
1738{
1739 if (cdir->fdir)
1740 closedir(cdir->fdir);
91a2288b
NTND
1741 /*
1742 * We have gone through this directory and found no untracked
1743 * entries. Mark it valid.
1744 */
26cb0182 1745 if (cdir->untracked) {
91a2288b 1746 cdir->untracked->valid = 1;
26cb0182
NTND
1747 cdir->untracked->recurse = 1;
1748 }
16e2cfa9
JH
1749}
1750
453ec4bd
LT
1751/*
1752 * Read a directory tree. We currently ignore anything but
1753 * directories, regular files and symlinks. That's because git
1754 * doesn't handle them at all yet. Maybe that will change some
1755 * day.
1756 *
1757 * Also, we ignore the name ".git" (even if it is not a directory).
1758 * That likely will not change.
defd7c7b
KB
1759 *
1760 * Returns the most significant path_treatment value encountered in the scan.
453ec4bd 1761 */
defd7c7b 1762static enum path_treatment read_directory_recursive(struct dir_struct *dir,
53cc5356 1763 const char *base, int baselen,
0dcb8d7f 1764 struct untracked_cache_dir *untracked, int check_only,
e1b8c7bd 1765 const struct pathspec *pathspec)
453ec4bd 1766{
cf7c6148 1767 struct cached_dir cdir;
defd7c7b 1768 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1769 struct strbuf path = STRBUF_INIT;
453ec4bd 1770
bef36921 1771 strbuf_add(&path, base, baselen);
02cb6753 1772
cf7c6148 1773 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))
1528d247
RS
1774 goto out;
1775
0dcb8d7f
NTND
1776 if (untracked)
1777 untracked->check_only = !!check_only;
1778
cf7c6148 1779 while (!read_cached_dir(&cdir)) {
defd7c7b 1780 /* check how the file or directory should be treated */
e1b8c7bd
BW
1781 state = treat_path(dir, untracked, &cdir, &path,
1782 baselen, pathspec);
0dcb8d7f 1783
defd7c7b
KB
1784 if (state > dir_state)
1785 dir_state = state;
1786
1787 /* recurse into subdir if instructed by treat_path */
1788 if (state == path_recurse) {
0dcb8d7f
NTND
1789 struct untracked_cache_dir *ud;
1790 ud = lookup_untracked(dir->untracked, untracked,
1791 path.buf + baselen,
1792 path.len - baselen);
1793 subdir_state =
e1b8c7bd
BW
1794 read_directory_recursive(dir, path.buf,
1795 path.len, ud,
1796 check_only, pathspec);
defd7c7b
KB
1797 if (subdir_state > dir_state)
1798 dir_state = subdir_state;
1799 }
1800
1801 if (check_only) {
1802 /* abort early if maximum state has been reached */
0dcb8d7f 1803 if (dir_state == path_untracked) {
91a2288b 1804 if (cdir.fdir)
0dcb8d7f 1805 add_untracked(untracked, path.buf + baselen);
defd7c7b 1806 break;
0dcb8d7f 1807 }
defd7c7b 1808 /* skip the dir_add_* part */
02cb6753 1809 continue;
453ec4bd 1810 }
defd7c7b
KB
1811
1812 /* add the path to the appropriate result list */
1813 switch (state) {
1814 case path_excluded:
1815 if (dir->flags & DIR_SHOW_IGNORED)
1816 dir_add_name(dir, path.buf, path.len);
0aaf62b6
KB
1817 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1818 ((dir->flags & DIR_COLLECT_IGNORED) &&
1819 exclude_matches_pathspec(path.buf, path.len,
e1b8c7bd 1820 pathspec)))
0aaf62b6 1821 dir_add_ignored(dir, path.buf, path.len);
defd7c7b
KB
1822 break;
1823
1824 case path_untracked:
0dcb8d7f
NTND
1825 if (dir->flags & DIR_SHOW_IGNORED)
1826 break;
1827 dir_add_name(dir, path.buf, path.len);
91a2288b 1828 if (cdir.fdir)
0dcb8d7f 1829 add_untracked(untracked, path.buf + baselen);
1528d247 1830 break;
defd7c7b
KB
1831
1832 default:
1833 break;
1834 }
453ec4bd 1835 }
cf7c6148 1836 close_cached_dir(&cdir);
1528d247 1837 out:
bef36921 1838 strbuf_release(&path);
453ec4bd 1839
defd7c7b 1840 return dir_state;
453ec4bd
LT
1841}
1842
1843static int cmp_name(const void *p1, const void *p2)
1844{
1845 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1846 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1847
ccdd4a0f 1848 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
1849}
1850
48ffef96
JH
1851static int treat_leading_path(struct dir_struct *dir,
1852 const char *path, int len,
e1b8c7bd 1853 const struct pathspec *pathspec)
48ffef96 1854{
49dc2cc2
RS
1855 struct strbuf sb = STRBUF_INIT;
1856 int baselen, rc = 0;
48ffef96 1857 const char *cp;
be8a84c5 1858 int old_flags = dir->flags;
48ffef96
JH
1859
1860 while (len && path[len - 1] == '/')
1861 len--;
1862 if (!len)
1863 return 1;
1864 baselen = 0;
be8a84c5 1865 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
1866 while (1) {
1867 cp = path + baselen + !!baselen;
1868 cp = memchr(cp, '/', path + len - cp);
1869 if (!cp)
1870 baselen = len;
1871 else
1872 baselen = cp - path;
49dc2cc2
RS
1873 strbuf_setlen(&sb, 0);
1874 strbuf_add(&sb, path, baselen);
1875 if (!is_directory(sb.buf))
1876 break;
e1b8c7bd 1877 if (simplify_away(sb.buf, sb.len, pathspec))
49dc2cc2 1878 break;
e1b8c7bd 1879 if (treat_one_path(dir, NULL, &sb, baselen, pathspec,
defd7c7b 1880 DT_DIR, NULL) == path_none)
49dc2cc2
RS
1881 break; /* do not recurse into it */
1882 if (len <= baselen) {
1883 rc = 1;
1884 break; /* finished checking */
1885 }
48ffef96 1886 }
49dc2cc2 1887 strbuf_release(&sb);
be8a84c5 1888 dir->flags = old_flags;
49dc2cc2 1889 return rc;
48ffef96
JH
1890}
1891
1e8fef60
NTND
1892static const char *get_ident_string(void)
1893{
1894 static struct strbuf sb = STRBUF_INIT;
1895 struct utsname uts;
1896
1897 if (sb.len)
1898 return sb.buf;
100e4337 1899 if (uname(&uts) < 0)
1e8fef60 1900 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
1901 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
1902 uts.sysname);
1e8fef60
NTND
1903 return sb.buf;
1904}
1905
1906static int ident_in_untracked(const struct untracked_cache *uc)
1907{
0e0f7618
CC
1908 /*
1909 * Previous git versions may have saved many NUL separated
1910 * strings in the "ident" field, but it is insane to manage
1911 * many locations, so just take care of the first one.
1912 */
1e8fef60 1913
0e0f7618 1914 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
1915}
1916
0e0f7618 1917static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 1918{
0e0f7618 1919 strbuf_reset(&uc->ident);
1e8fef60 1920 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
1921
1922 /*
1923 * This strbuf used to contain a list of NUL separated
1924 * strings, so save NUL too for backward compatibility.
1925 */
1e8fef60
NTND
1926 strbuf_addch(&uc->ident, 0);
1927}
1928
4a4ca479
CC
1929static void new_untracked_cache(struct index_state *istate)
1930{
1931 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
1932 strbuf_init(&uc->ident, 100);
1933 uc->exclude_per_dir = ".gitignore";
1934 /* should be the same flags used by git-status */
1935 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 1936 set_untracked_ident(uc);
4a4ca479 1937 istate->untracked = uc;
0e0f7618 1938 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
1939}
1940
1941void add_untracked_cache(struct index_state *istate)
1942{
1943 if (!istate->untracked) {
1944 new_untracked_cache(istate);
0e0f7618
CC
1945 } else {
1946 if (!ident_in_untracked(istate->untracked)) {
1947 free_untracked_cache(istate->untracked);
1948 new_untracked_cache(istate);
1949 }
1950 }
4a4ca479
CC
1951}
1952
07b29bfd
CC
1953void remove_untracked_cache(struct index_state *istate)
1954{
1955 if (istate->untracked) {
1956 free_untracked_cache(istate->untracked);
1957 istate->untracked = NULL;
1958 istate->cache_changed |= UNTRACKED_CHANGED;
1959 }
1960}
1961
ccad261f
NTND
1962static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
1963 int base_len,
1964 const struct pathspec *pathspec)
1965{
1966 struct untracked_cache_dir *root;
1967
76e6b090 1968 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
ccad261f
NTND
1969 return NULL;
1970
1971 /*
1972 * We only support $GIT_DIR/info/exclude and core.excludesfile
1973 * as the global ignore rule files. Any other additions
1974 * (e.g. from command line) invalidate the cache. This
1975 * condition also catches running setup_standard_excludes()
1976 * before setting dir->untracked!
1977 */
1978 if (dir->unmanaged_exclude_files)
1979 return NULL;
1980
1981 /*
1982 * Optimize for the main use case only: whole-tree git
1983 * status. More work involved in treat_leading_path() if we
1984 * use cache on just a subset of the worktree. pathspec
1985 * support could make the matter even worse.
1986 */
1987 if (base_len || (pathspec && pathspec->nr))
1988 return NULL;
1989
1990 /* Different set of flags may produce different results */
1991 if (dir->flags != dir->untracked->dir_flags ||
1992 /*
1993 * See treat_directory(), case index_nonexistent. Without
1994 * this flag, we may need to also cache .git file content
1995 * for the resolve_gitlink_ref() call, which we don't.
1996 */
1997 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
1998 /* We don't support collecting ignore files */
1999 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
2000 DIR_COLLECT_IGNORED)))
2001 return NULL;
2002
2003 /*
2004 * If we use .gitignore in the cache and now you change it to
2005 * .gitexclude, everything will go wrong.
2006 */
2007 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
2008 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
2009 return NULL;
2010
2011 /*
2012 * EXC_CMDL is not considered in the cache. If people set it,
2013 * skip the cache.
2014 */
2015 if (dir->exclude_list_group[EXC_CMDL].nr)
2016 return NULL;
2017
1e8fef60 2018 if (!ident_in_untracked(dir->untracked)) {
0e0f7618 2019 warning(_("Untracked cache is disabled on this system or location."));
1e8fef60
NTND
2020 return NULL;
2021 }
2022
ccad261f
NTND
2023 if (!dir->untracked->root) {
2024 const int len = sizeof(*dir->untracked->root);
2025 dir->untracked->root = xmalloc(len);
2026 memset(dir->untracked->root, 0, len);
2027 }
2028
2029 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
2030 root = dir->untracked->root;
2031 if (hashcmp(dir->ss_info_exclude.sha1,
2032 dir->untracked->ss_info_exclude.sha1)) {
2033 invalidate_gitignore(dir->untracked, root);
2034 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
2035 }
2036 if (hashcmp(dir->ss_excludes_file.sha1,
2037 dir->untracked->ss_excludes_file.sha1)) {
2038 invalidate_gitignore(dir->untracked, root);
2039 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
2040 }
26cb0182
NTND
2041
2042 /* Make sure this directory is not dropped out at saving phase */
2043 root->recurse = 1;
ccad261f
NTND
2044 return root;
2045}
2046
e1b8c7bd
BW
2047int read_directory(struct dir_struct *dir, const char *path,
2048 int len, const struct pathspec *pathspec)
9fc42d60 2049{
ccad261f 2050 struct untracked_cache_dir *untracked;
b4189aa8 2051
dba2e203 2052 if (has_symlink_leading_path(path, len))
725b0605
JH
2053 return dir->nr;
2054
ccad261f
NTND
2055 untracked = validate_untracked_cache(dir, len, pathspec);
2056 if (!untracked)
2057 /*
2058 * make sure untracked cache code path is disabled,
2059 * e.g. prep_exclude()
2060 */
2061 dir->untracked = NULL;
e1b8c7bd
BW
2062 if (!len || treat_leading_path(dir, path, len, pathspec))
2063 read_directory_recursive(dir, path, len, untracked, 0, pathspec);
9ed0d8d6
RS
2064 QSORT(dir->entries, dir->nr, cmp_name);
2065 QSORT(dir->ignored, dir->ignored_nr, cmp_name);
c9ccb5d3
NTND
2066 if (dir->untracked) {
2067 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2068 trace_printf_key(&trace_untracked_stats,
2069 "node creation: %u\n"
2070 "gitignore invalidation: %u\n"
2071 "directory invalidation: %u\n"
2072 "opendir: %u\n",
2073 dir->untracked->dir_created,
2074 dir->untracked->gitignore_invalidated,
2075 dir->untracked->dir_invalidated,
2076 dir->untracked->dir_opened);
1bbb3dba
NTND
2077 if (dir->untracked == the_index.untracked &&
2078 (dir->untracked->dir_opened ||
2079 dir->untracked->gitignore_invalidated ||
2080 dir->untracked->dir_invalidated))
2081 the_index.cache_changed |= UNTRACKED_CHANGED;
2082 if (dir->untracked != the_index.untracked) {
2083 free(dir->untracked);
2084 dir->untracked = NULL;
2085 }
c9ccb5d3 2086 }
453ec4bd
LT
2087 return dir->nr;
2088}
c91f0d92 2089
686a4a06 2090int file_exists(const char *f)
c91f0d92 2091{
686a4a06 2092 struct stat sb;
a50f9fc5 2093 return lstat(f, &sb) == 0;
c91f0d92 2094}
e6636747 2095
63ec5e1f
JS
2096static int cmp_icase(char a, char b)
2097{
2098 if (a == b)
2099 return 0;
2100 if (ignore_case)
2101 return toupper(a) - toupper(b);
2102 return a - b;
2103}
2104
e6636747 2105/*
9b125da4
NTND
2106 * Given two normalized paths (a trailing slash is ok), if subdir is
2107 * outside dir, return -1. Otherwise return the offset in subdir that
2108 * can be used as relative path to dir.
e6636747 2109 */
9b125da4 2110int dir_inside_of(const char *subdir, const char *dir)
e6636747 2111{
9b125da4 2112 int offset = 0;
e6636747 2113
9b125da4 2114 assert(dir && subdir && *dir && *subdir);
e6636747 2115
63ec5e1f 2116 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2117 dir++;
9b125da4
NTND
2118 subdir++;
2119 offset++;
490544b1 2120 }
9b125da4
NTND
2121
2122 /* hel[p]/me vs hel[l]/yeah */
2123 if (*dir && *subdir)
2124 return -1;
2125
2126 if (!*subdir)
2127 return !*dir ? offset : -1; /* same dir */
2128
2129 /* foo/[b]ar vs foo/[] */
2130 if (is_dir_sep(dir[-1]))
2131 return is_dir_sep(subdir[-1]) ? offset : -1;
2132
2133 /* foo[/]bar vs foo[] */
2134 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2135}
2136
2137int is_inside_dir(const char *dir)
2138{
56b9f6e7
RS
2139 char *cwd;
2140 int rc;
2141
b892913d
NTND
2142 if (!dir)
2143 return 0;
56b9f6e7
RS
2144
2145 cwd = xgetcwd();
2146 rc = (dir_inside_of(cwd, dir) >= 0);
2147 free(cwd);
2148 return rc;
e6636747 2149}
7155b727 2150
55892d23
AP
2151int is_empty_dir(const char *path)
2152{
2153 DIR *dir = opendir(path);
2154 struct dirent *e;
2155 int ret = 1;
2156
2157 if (!dir)
2158 return 0;
2159
2160 while ((e = readdir(dir)) != NULL)
2161 if (!is_dot_or_dotdot(e->d_name)) {
2162 ret = 0;
2163 break;
2164 }
2165
2166 closedir(dir);
2167 return ret;
2168}
2169
ae2f203e 2170static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2171{
a0f4afbe 2172 DIR *dir;
7155b727 2173 struct dirent *e;
ae2f203e 2174 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2175 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2176 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
a0f4afbe 2177 unsigned char submodule_head[20];
7155b727 2178
a0f4afbe 2179 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
ae2f203e 2180 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
a0f4afbe 2181 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2182 if (kept_up)
2183 *kept_up = 1;
a0f4afbe 2184 return 0;
ae2f203e 2185 }
a0f4afbe 2186
ae2f203e 2187 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2188 dir = opendir(path->buf);
c844a803 2189 if (!dir) {
863808cd
MH
2190 if (errno == ENOENT)
2191 return keep_toplevel ? -1 : 0;
2192 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2193 /*
2194 * An empty dir could be removable even if it
2195 * is unreadable:
2196 */
c844a803
JH
2197 return rmdir(path->buf);
2198 else
2199 return -1;
2200 }
00b6c178 2201 strbuf_complete(path, '/');
7155b727
JS
2202
2203 len = path->len;
2204 while ((e = readdir(dir)) != NULL) {
2205 struct stat st;
8ca12c0d
AP
2206 if (is_dot_or_dotdot(e->d_name))
2207 continue;
7155b727
JS
2208
2209 strbuf_setlen(path, len);
2210 strbuf_addstr(path, e->d_name);
863808cd
MH
2211 if (lstat(path->buf, &st)) {
2212 if (errno == ENOENT)
2213 /*
2214 * file disappeared, which is what we
2215 * wanted anyway
2216 */
2217 continue;
2218 /* fall thru */
2219 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2220 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2221 continue; /* happy */
863808cd
MH
2222 } else if (!only_empty &&
2223 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2224 continue; /* happy, too */
863808cd 2225 }
7155b727
JS
2226
2227 /* path too long, stat fails, or non-directory still exists */
2228 ret = -1;
2229 break;
2230 }
2231 closedir(dir);
2232
2233 strbuf_setlen(path, original_len);
ae2f203e 2234 if (!ret && !keep_toplevel && !kept_down)
863808cd 2235 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2236 else if (kept_up)
2237 /*
2238 * report the uplevel that it is not an error that we
2239 * did not rmdir() our directory.
2240 */
2241 *kept_up = !ret;
7155b727
JS
2242 return ret;
2243}
039bc64e 2244
ae2f203e
JH
2245int remove_dir_recursively(struct strbuf *path, int flag)
2246{
2247 return remove_dir_recurse(path, flag, NULL);
2248}
2249
f932729c
JK
2250static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2251
039bc64e
JH
2252void setup_standard_excludes(struct dir_struct *dir)
2253{
039bc64e 2254 dir->exclude_per_dir = ".gitignore";
099d2d86
JH
2255
2256 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2845ce7f
PT
2257 if (!excludes_file)
2258 excludes_file = xdg_config_home("ignore");
4698c8fe 2259 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2260 add_excludes_from_file_1(dir, excludes_file,
2261 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2262
2263 /* per repository user preference */
f0056f64
JK
2264 if (startup_info->have_repository) {
2265 const char *path = git_path_info_exclude();
2266 if (!access_or_warn(path, R_OK, 0))
2267 add_excludes_from_file_1(dir, path,
2268 dir->untracked ? &dir->ss_info_exclude : NULL);
2269 }
039bc64e 2270}
4a92d1bf
AR
2271
2272int remove_path(const char *name)
2273{
2274 char *slash;
2275
9a6728d4 2276 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)
4a92d1bf
AR
2277 return -1;
2278
2279 slash = strrchr(name, '/');
2280 if (slash) {
2281 char *dirs = xstrdup(name);
2282 slash = dirs + (slash - name);
2283 do {
2284 *slash = '\0';
3fc0d131 2285 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2286 free(dirs);
2287 }
2288 return 0;
2289}
2290
270be816
AS
2291/*
2292 * Frees memory within dir which was allocated for exclude lists and
2293 * the exclude_stack. Does not free dir itself.
2294 */
2295void clear_directory(struct dir_struct *dir)
2296{
2297 int i, j;
2298 struct exclude_list_group *group;
2299 struct exclude_list *el;
2300 struct exclude_stack *stk;
2301
2302 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2303 group = &dir->exclude_list_group[i];
2304 for (j = 0; j < group->nr; j++) {
2305 el = &group->el[j];
2306 if (i == EXC_DIRS)
2307 free((char *)el->src);
2308 clear_exclude_list(el);
2309 }
2310 free(group->el);
2311 }
2312
2313 stk = dir->exclude_stack;
2314 while (stk) {
2315 struct exclude_stack *prev = stk->prev;
2316 free(stk);
2317 stk = prev;
2318 }
aceb9429 2319 strbuf_release(&dir->basebuf);
270be816 2320}
83c094ad
NTND
2321
2322struct ondisk_untracked_cache {
2323 struct stat_data info_exclude_stat;
2324 struct stat_data excludes_file_stat;
2325 uint32_t dir_flags;
2326 unsigned char info_exclude_sha1[20];
2327 unsigned char excludes_file_sha1[20];
2328 char exclude_per_dir[FLEX_ARRAY];
2329};
2330
2331#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)
2332
2333struct write_data {
2334 int index; /* number of written untracked_cache_dir */
2335 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2336 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2337 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2338 struct strbuf out;
2339 struct strbuf sb_stat;
2340 struct strbuf sb_sha1;
2341};
2342
2343static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2344{
2345 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2346 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2347 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2348 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2349 to->sd_dev = htonl(from->sd_dev);
2350 to->sd_ino = htonl(from->sd_ino);
2351 to->sd_uid = htonl(from->sd_uid);
2352 to->sd_gid = htonl(from->sd_gid);
2353 to->sd_size = htonl(from->sd_size);
2354}
2355
2356static void write_one_dir(struct untracked_cache_dir *untracked,
2357 struct write_data *wd)
2358{
2359 struct stat_data stat_data;
2360 struct strbuf *out = &wd->out;
2361 unsigned char intbuf[16];
2362 unsigned int intlen, value;
2363 int i = wd->index++;
2364
2365 /*
2366 * untracked_nr should be reset whenever valid is clear, but
2367 * for safety..
2368 */
2369 if (!untracked->valid) {
2370 untracked->untracked_nr = 0;
2371 untracked->check_only = 0;
2372 }
2373
2374 if (untracked->check_only)
2375 ewah_set(wd->check_only, i);
2376 if (untracked->valid) {
2377 ewah_set(wd->valid, i);
2378 stat_data_to_disk(&stat_data, &untracked->stat_data);
2379 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2380 }
2381 if (!is_null_sha1(untracked->exclude_sha1)) {
2382 ewah_set(wd->sha1_valid, i);
2383 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2384 }
2385
2386 intlen = encode_varint(untracked->untracked_nr, intbuf);
2387 strbuf_add(out, intbuf, intlen);
2388
2389 /* skip non-recurse directories */
2390 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2391 if (untracked->dirs[i]->recurse)
2392 value++;
2393 intlen = encode_varint(value, intbuf);
2394 strbuf_add(out, intbuf, intlen);
2395
2396 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2397
2398 for (i = 0; i < untracked->untracked_nr; i++)
2399 strbuf_add(out, untracked->untracked[i],
2400 strlen(untracked->untracked[i]) + 1);
2401
2402 for (i = 0; i < untracked->dirs_nr; i++)
2403 if (untracked->dirs[i]->recurse)
2404 write_one_dir(untracked->dirs[i], wd);
2405}
2406
2407void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2408{
2409 struct ondisk_untracked_cache *ouc;
2410 struct write_data wd;
2411 unsigned char varbuf[16];
e0b83735
JK
2412 int varint_len;
2413 size_t len = strlen(untracked->exclude_per_dir);
2414
2415 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
83c094ad
NTND
2416 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2417 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2418 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2419 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2420 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2421
2422 varint_len = encode_varint(untracked->ident.len, varbuf);
2423 strbuf_add(out, varbuf, varint_len);
8109984d 2424 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2425
83c094ad
NTND
2426 strbuf_add(out, ouc, ouc_size(len));
2427 free(ouc);
2428 ouc = NULL;
2429
2430 if (!untracked->root) {
2431 varint_len = encode_varint(0, varbuf);
2432 strbuf_add(out, varbuf, varint_len);
2433 return;
2434 }
2435
2436 wd.index = 0;
2437 wd.check_only = ewah_new();
2438 wd.valid = ewah_new();
2439 wd.sha1_valid = ewah_new();
2440 strbuf_init(&wd.out, 1024);
2441 strbuf_init(&wd.sb_stat, 1024);
2442 strbuf_init(&wd.sb_sha1, 1024);
2443 write_one_dir(untracked->root, &wd);
2444
2445 varint_len = encode_varint(wd.index, varbuf);
2446 strbuf_add(out, varbuf, varint_len);
2447 strbuf_addbuf(out, &wd.out);
2448 ewah_serialize_strbuf(wd.valid, out);
2449 ewah_serialize_strbuf(wd.check_only, out);
2450 ewah_serialize_strbuf(wd.sha1_valid, out);
2451 strbuf_addbuf(out, &wd.sb_stat);
2452 strbuf_addbuf(out, &wd.sb_sha1);
2453 strbuf_addch(out, '\0'); /* safe guard for string lists */
2454
2455 ewah_free(wd.valid);
2456 ewah_free(wd.check_only);
2457 ewah_free(wd.sha1_valid);
2458 strbuf_release(&wd.out);
2459 strbuf_release(&wd.sb_stat);
2460 strbuf_release(&wd.sb_sha1);
2461}
f9e6c649
NTND
2462
2463static void free_untracked(struct untracked_cache_dir *ucd)
2464{
2465 int i;
2466 if (!ucd)
2467 return;
2468 for (i = 0; i < ucd->dirs_nr; i++)
2469 free_untracked(ucd->dirs[i]);
2470 for (i = 0; i < ucd->untracked_nr; i++)
2471 free(ucd->untracked[i]);
2472 free(ucd->untracked);
2473 free(ucd->dirs);
2474 free(ucd);
2475}
2476
2477void free_untracked_cache(struct untracked_cache *uc)
2478{
2479 if (uc)
2480 free_untracked(uc->root);
2481 free(uc);
2482}
2483
2484struct read_data {
2485 int index;
2486 struct untracked_cache_dir **ucd;
2487 struct ewah_bitmap *check_only;
2488 struct ewah_bitmap *valid;
2489 struct ewah_bitmap *sha1_valid;
2490 const unsigned char *data;
2491 const unsigned char *end;
2492};
2493
2494static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
2495{
2496 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
2497 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
2498 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
2499 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
2500 to->sd_dev = get_be32(&from->sd_dev);
2501 to->sd_ino = get_be32(&from->sd_ino);
2502 to->sd_uid = get_be32(&from->sd_uid);
2503 to->sd_gid = get_be32(&from->sd_gid);
2504 to->sd_size = get_be32(&from->sd_size);
2505}
2506
2507static int read_one_dir(struct untracked_cache_dir **untracked_,
2508 struct read_data *rd)
2509{
2510 struct untracked_cache_dir ud, *untracked;
2511 const unsigned char *next, *data = rd->data, *end = rd->end;
2512 unsigned int value;
2513 int i, len;
2514
2515 memset(&ud, 0, sizeof(ud));
2516
2517 next = data;
2518 value = decode_varint(&next);
2519 if (next > end)
2520 return -1;
2521 ud.recurse = 1;
2522 ud.untracked_alloc = value;
2523 ud.untracked_nr = value;
2524 if (ud.untracked_nr)
b32fa95f 2525 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649
NTND
2526 data = next;
2527
2528 next = data;
2529 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2530 if (next > end)
2531 return -1;
b32fa95f 2532 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649
NTND
2533 data = next;
2534
2535 len = strlen((const char *)data);
2536 next = data + len + 1;
2537 if (next > rd->end)
2538 return -1;
50a6c8ef 2539 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));
f9e6c649
NTND
2540 memcpy(untracked, &ud, sizeof(ud));
2541 memcpy(untracked->name, data, len + 1);
2542 data = next;
2543
2544 for (i = 0; i < untracked->untracked_nr; i++) {
2545 len = strlen((const char *)data);
2546 next = data + len + 1;
2547 if (next > rd->end)
2548 return -1;
2549 untracked->untracked[i] = xstrdup((const char*)data);
2550 data = next;
2551 }
2552
2553 rd->ucd[rd->index++] = untracked;
2554 rd->data = data;
2555
2556 for (i = 0; i < untracked->dirs_nr; i++) {
2557 len = read_one_dir(untracked->dirs + i, rd);
2558 if (len < 0)
2559 return -1;
2560 }
2561 return 0;
2562}
2563
2564static void set_check_only(size_t pos, void *cb)
2565{
2566 struct read_data *rd = cb;
2567 struct untracked_cache_dir *ud = rd->ucd[pos];
2568 ud->check_only = 1;
2569}
2570
2571static void read_stat(size_t pos, void *cb)
2572{
2573 struct read_data *rd = cb;
2574 struct untracked_cache_dir *ud = rd->ucd[pos];
2575 if (rd->data + sizeof(struct stat_data) > rd->end) {
2576 rd->data = rd->end + 1;
2577 return;
2578 }
2579 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
2580 rd->data += sizeof(struct stat_data);
2581 ud->valid = 1;
2582}
2583
2584static void read_sha1(size_t pos, void *cb)
2585{
2586 struct read_data *rd = cb;
2587 struct untracked_cache_dir *ud = rd->ucd[pos];
2588 if (rd->data + 20 > rd->end) {
2589 rd->data = rd->end + 1;
2590 return;
2591 }
2592 hashcpy(ud->exclude_sha1, rd->data);
2593 rd->data += 20;
2594}
2595
2596static void load_sha1_stat(struct sha1_stat *sha1_stat,
2597 const struct stat_data *stat,
2598 const unsigned char *sha1)
2599{
2600 stat_data_from_disk(&sha1_stat->stat, stat);
2601 hashcpy(sha1_stat->sha1, sha1);
2602 sha1_stat->valid = 1;
2603}
2604
2605struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2606{
2607 const struct ondisk_untracked_cache *ouc;
2608 struct untracked_cache *uc;
2609 struct read_data rd;
2610 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60
NTND
2611 const char *ident;
2612 int ident_len, len;
f9e6c649
NTND
2613
2614 if (sz <= 1 || end[-1] != '\0')
2615 return NULL;
2616 end--;
2617
1e8fef60
NTND
2618 ident_len = decode_varint(&next);
2619 if (next + ident_len > end)
2620 return NULL;
2621 ident = (const char *)next;
2622 next += ident_len;
2623
f9e6c649
NTND
2624 ouc = (const struct ondisk_untracked_cache *)next;
2625 if (next + ouc_size(0) > end)
2626 return NULL;
2627
2628 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2629 strbuf_init(&uc->ident, ident_len);
2630 strbuf_add(&uc->ident, ident, ident_len);
f9e6c649
NTND
2631 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
2632 ouc->info_exclude_sha1);
2633 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
2634 ouc->excludes_file_sha1);
2635 uc->dir_flags = get_be32(&ouc->dir_flags);
2636 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
2637 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
2638 next += ouc_size(strlen(ouc->exclude_per_dir));
2639 if (next >= end)
2640 goto done2;
2641
2642 len = decode_varint(&next);
2643 if (next > end || len == 0)
2644 goto done2;
2645
2646 rd.valid = ewah_new();
2647 rd.check_only = ewah_new();
2648 rd.sha1_valid = ewah_new();
2649 rd.data = next;
2650 rd.end = end;
2651 rd.index = 0;
b32fa95f 2652 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2653
2654 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2655 goto done;
2656
2657 next = rd.data;
2658 len = ewah_read_mmap(rd.valid, next, end - next);
2659 if (len < 0)
2660 goto done;
2661
2662 next += len;
2663 len = ewah_read_mmap(rd.check_only, next, end - next);
2664 if (len < 0)
2665 goto done;
2666
2667 next += len;
2668 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2669 if (len < 0)
2670 goto done;
2671
2672 ewah_each_bit(rd.check_only, set_check_only, &rd);
2673 rd.data = next + len;
2674 ewah_each_bit(rd.valid, read_stat, &rd);
2675 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2676 next = rd.data;
2677
2678done:
2679 free(rd.ucd);
2680 ewah_free(rd.valid);
2681 ewah_free(rd.check_only);
2682 ewah_free(rd.sha1_valid);
2683done2:
2684 if (next != end) {
2685 free_untracked_cache(uc);
2686 uc = NULL;
2687 }
2688 return uc;
2689}
e931371a 2690
73f9145f
NTND
2691static void invalidate_one_directory(struct untracked_cache *uc,
2692 struct untracked_cache_dir *ucd)
2693{
2694 uc->dir_invalidated++;
2695 ucd->valid = 0;
2696 ucd->untracked_nr = 0;
2697}
2698
2699/*
2700 * Normally when an entry is added or removed from a directory,
2701 * invalidating that directory is enough. No need to touch its
2702 * ancestors. When a directory is shown as "foo/bar/" in git-status
2703 * however, deleting or adding an entry may have cascading effect.
2704 *
2705 * Say the "foo/bar/file" has become untracked, we need to tell the
2706 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2707 * directory any more (because "bar" is managed by foo as an untracked
2708 * "file").
2709 *
2710 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2711 * was the last untracked entry in the entire "foo", we should show
2712 * "foo/" instead. Which means we have to invalidate past "bar" up to
2713 * "foo".
2714 *
2715 * This function traverses all directories from root to leaf. If there
2716 * is a chance of one of the above cases happening, we invalidate back
2717 * to root. Otherwise we just invalidate the leaf. There may be a more
2718 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2719 * detect these cases and avoid unnecessary invalidation, for example,
2720 * checking for the untracked entry named "bar/" in "foo", but for now
2721 * stick to something safe and simple.
2722 */
2723static int invalidate_one_component(struct untracked_cache *uc,
2724 struct untracked_cache_dir *dir,
2725 const char *path, int len)
2726{
2727 const char *rest = strchr(path, '/');
2728
2729 if (rest) {
2730 int component_len = rest - path;
2731 struct untracked_cache_dir *d =
2732 lookup_untracked(uc, dir, path, component_len);
2733 int ret =
2734 invalidate_one_component(uc, d, rest + 1,
2735 len - (component_len + 1));
2736 if (ret)
2737 invalidate_one_directory(uc, dir);
2738 return ret;
2739 }
2740
2741 invalidate_one_directory(uc, dir);
2742 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2743}
2744
e931371a
NTND
2745void untracked_cache_invalidate_path(struct index_state *istate,
2746 const char *path)
2747{
e931371a
NTND
2748 if (!istate->untracked || !istate->untracked->root)
2749 return;
73f9145f
NTND
2750 invalidate_one_component(istate->untracked, istate->untracked->root,
2751 path, strlen(path));
e931371a
NTND
2752}
2753
2754void untracked_cache_remove_from_index(struct index_state *istate,
2755 const char *path)
2756{
2757 untracked_cache_invalidate_path(istate, path);
2758}
2759
2760void untracked_cache_add_to_index(struct index_state *istate,
2761 const char *path)
2762{
2763 untracked_cache_invalidate_path(istate, path);
2764}
47e83eb3
SB
2765
2766/* Update gitfile and core.worktree setting to connect work tree and git dir */
2767void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
2768{
365444a6
SB
2769 struct strbuf gitfile_sb = STRBUF_INIT;
2770 struct strbuf cfg_sb = STRBUF_INIT;
47e83eb3 2771 struct strbuf rel_path = STRBUF_INIT;
365444a6 2772 char *git_dir, *work_tree;
47e83eb3 2773
365444a6
SB
2774 /* Prepare .git file */
2775 strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);
2776 if (safe_create_leading_directories_const(gitfile_sb.buf))
2777 die(_("could not create directories for %s"), gitfile_sb.buf);
2778
2779 /* Prepare config file */
2780 strbuf_addf(&cfg_sb, "%s/config", git_dir_);
2781 if (safe_create_leading_directories_const(cfg_sb.buf))
2782 die(_("could not create directories for %s"), cfg_sb.buf);
47e83eb3 2783
e394fa01
JH
2784 git_dir = real_pathdup(git_dir_, 1);
2785 work_tree = real_pathdup(work_tree_, 1);
365444a6
SB
2786
2787 /* Write .git file */
2788 write_file(gitfile_sb.buf, "gitdir: %s",
2789 relative_path(git_dir, work_tree, &rel_path));
47e83eb3 2790 /* Update core.worktree setting */
365444a6 2791 git_config_set_in_file(cfg_sb.buf, "core.worktree",
47e83eb3
SB
2792 relative_path(work_tree, git_dir, &rel_path));
2793
365444a6
SB
2794 strbuf_release(&gitfile_sb);
2795 strbuf_release(&cfg_sb);
47e83eb3
SB
2796 strbuf_release(&rel_path);
2797 free(work_tree);
2798 free(git_dir);
2799}
f6f85861
SB
2800
2801/*
2802 * Migrate the git directory of the given path from old_git_dir to new_git_dir.
2803 */
2804void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
2805{
2806 if (rename(old_git_dir, new_git_dir) < 0)
2807 die_errno(_("could not migrate git directory from '%s' to '%s'"),
2808 old_git_dir, new_git_dir);
2809
2810 connect_work_tree_and_git_dir(path, new_git_dir);
2811}