dir: hide untracked contents of untracked dirs
[git/git.git] / dir.c
CommitLineData
453ec4bd
LT
1/*
2 * This handles recursive filename detection with exclude
3 * files, index knowledge etc..
4 *
95a68344
AS
5 * See Documentation/technical/api-directory-listing.txt
6 *
453ec4bd
LT
7 * Copyright (C) Linus Torvalds, 2005-2006
8 * Junio Hamano, 2005-2006
9 */
453ec4bd
LT
10#include "cache.h"
11#include "dir.h"
09595258 12#include "refs.h"
237ec6e4 13#include "wildmatch.h"
64acde94 14#include "pathspec.h"
dde843e7 15#include "utf8.h"
83c094ad
NTND
16#include "varint.h"
17#include "ewah/ewok.h"
453ec4bd 18
defd7c7b
KB
19/*
20 * Tells read_directory_recursive how a file or directory should be treated.
21 * Values are ordered by significance, e.g. if a directory contains both
22 * excluded and untracked files, it is listed as untracked because
23 * path_untracked > path_excluded.
24 */
25enum path_treatment {
26 path_none = 0,
27 path_recurse,
28 path_excluded,
29 path_untracked
30};
31
cf7c6148
NTND
32/*
33 * Support data structure for our opendir/readdir/closedir wrappers
34 */
35struct cached_dir {
36 DIR *fdir;
37 struct untracked_cache_dir *untracked;
91a2288b
NTND
38 int nr_files;
39 int nr_dirs;
40
cf7c6148 41 struct dirent *de;
91a2288b
NTND
42 const char *file;
43 struct untracked_cache_dir *ucd;
cf7c6148
NTND
44};
45
defd7c7b 46static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0dcb8d7f 47 const char *path, int len, struct untracked_cache_dir *untracked,
e1b8c7bd 48 int check_only, const struct pathspec *pathspec);
caa6b782 49static int get_dtype(struct dirent *de, const char *path, int len);
09595258 50
ba0897e6 51int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
52{
53 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
54}
55
ba0897e6 56int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
57{
58 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
59}
60
1f26ce61
CB
61int git_fnmatch(const struct pathspec_item *item,
62 const char *pattern, const char *string,
63 int prefix)
5d74762d 64{
5d74762d 65 if (prefix > 0) {
93d93537 66 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 67 return WM_NOMATCH;
5d74762d
NTND
68 pattern += prefix;
69 string += prefix;
70 }
bd30c2e4 71 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
72 int pattern_len = strlen(++pattern);
73 int string_len = strlen(string);
74 return string_len < pattern_len ||
93d93537
NTND
75 ps_strcmp(item, pattern,
76 string + string_len - pattern_len);
8c6abbcd 77 }
bd30c2e4 78 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
79 return wildmatch(pattern, string,
80 WM_PATHNAME |
81 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0),
82 NULL);
bd30c2e4
NTND
83 else
84 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f
NTND
85 return wildmatch(pattern, string,
86 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
87 NULL);
5d74762d
NTND
88}
89
0b6e56df
JH
90static int fnmatch_icase_mem(const char *pattern, int patternlen,
91 const char *string, int stringlen,
92 int flags)
93{
94 int match_status;
95 struct strbuf pat_buf = STRBUF_INIT;
96 struct strbuf str_buf = STRBUF_INIT;
97 const char *use_pat = pattern;
98 const char *use_str = string;
99
100 if (pattern[patternlen]) {
101 strbuf_add(&pat_buf, pattern, patternlen);
102 use_pat = pat_buf.buf;
103 }
104 if (string[stringlen]) {
105 strbuf_add(&str_buf, string, stringlen);
106 use_str = str_buf.buf;
107 }
108
f30366b2
JH
109 if (ignore_case)
110 flags |= WM_CASEFOLD;
111 match_status = wildmatch(use_pat, use_str, flags, NULL);
0b6e56df
JH
112
113 strbuf_release(&pat_buf);
114 strbuf_release(&str_buf);
115
116 return match_status;
117}
118
827f4d6c 119static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 120{
827f4d6c 121 int n;
4a085b16 122 size_t max = 0;
3c6a370b 123
93d93537
NTND
124 /*
125 * ":(icase)path" is treated as a pathspec full of
126 * wildcard. In other words, only prefix is considered common
127 * prefix. If the pathspec is abc/foo abc/bar, running in
128 * subdir xyz, the common prefix is still xyz, not xuz/abc as
129 * in non-:(icase).
130 */
5c6933d2
NTND
131 GUARD_PATHSPEC(pathspec,
132 PATHSPEC_FROMTOP |
133 PATHSPEC_MAXDEPTH |
bd30c2e4 134 PATHSPEC_LITERAL |
93d93537 135 PATHSPEC_GLOB |
ef79b1f8
NTND
136 PATHSPEC_ICASE |
137 PATHSPEC_EXCLUDE);
4a085b16 138
827f4d6c 139 for (n = 0; n < pathspec->nr; n++) {
93d93537 140 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
141 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
142 continue;
93d93537
NTND
143 if (pathspec->items[n].magic & PATHSPEC_ICASE)
144 item_len = pathspec->items[n].prefix;
145 else
146 item_len = pathspec->items[n].nowildcard_len;
147 while (i < item_len && (n == 0 || i < max)) {
827f4d6c
NTND
148 char c = pathspec->items[n].match[i];
149 if (c != pathspec->items[0].match[i])
4a085b16
JH
150 break;
151 if (c == '/')
152 len = i + 1;
827f4d6c 153 i++;
4a085b16 154 }
827f4d6c 155 if (n == 0 || len < max) {
4a085b16
JH
156 max = len;
157 if (!max)
158 break;
159 }
3c6a370b 160 }
4a085b16 161 return max;
3c6a370b
LT
162}
163
f950eb95
CB
164/*
165 * Returns a copy of the longest leading path common among all
166 * pathspecs.
167 */
827f4d6c 168char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
169{
170 unsigned long len = common_prefix_len(pathspec);
171
827f4d6c 172 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
173}
174
7327d3d1 175int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
1d8842d9 176{
bec5ab89 177 const char *prefix;
966de302 178 size_t prefix_len;
1d8842d9
LT
179
180 /*
181 * Calculate common prefix for the pathspec, and
182 * use that to optimize the directory walk
183 */
bec5ab89
RS
184 prefix_len = common_prefix_len(pathspec);
185 prefix = prefix_len ? pathspec->items[0].match : "";
1d8842d9
LT
186
187 /* Read the directory and prune it */
966de302
BW
188 read_directory(dir, prefix, prefix_len, pathspec);
189
966de302 190 return prefix_len;
1d8842d9
LT
191}
192
bc96cc87
NTND
193int within_depth(const char *name, int namelen,
194 int depth, int max_depth)
195{
196 const char *cp = name, *cpe = name + namelen;
197
198 while (cp < cpe) {
199 if (*cp++ != '/')
200 continue;
201 depth++;
202 if (depth > max_depth)
203 return 0;
204 }
205 return 1;
206}
207
75a6315f
BW
208#define DO_MATCH_EXCLUDE (1<<0)
209#define DO_MATCH_DIRECTORY (1<<1)
210#define DO_MATCH_SUBMODULE (1<<2)
42b0874a 211
61cf2820
NTND
212/*
213 * Does 'match' match the given name?
214 * A match is found if
215 *
216 * (1) the 'match' string is leading directory of 'name', or
217 * (2) the 'match' string is a wildcard and matches 'name', or
218 * (3) the 'match' string is exactly the same as 'name'.
219 *
220 * and the return value tells which case it was.
221 *
222 * It returns 0 when there is no match.
223 */
224static int match_pathspec_item(const struct pathspec_item *item, int prefix,
42b0874a 225 const char *name, int namelen, unsigned flags)
61cf2820
NTND
226{
227 /* name/namelen has prefix cut off by caller */
228 const char *match = item->match + prefix;
229 int matchlen = item->len - prefix;
230
93d93537
NTND
231 /*
232 * The normal call pattern is:
233 * 1. prefix = common_prefix_len(ps);
234 * 2. prune something, or fill_directory
854b0959 235 * 3. match_pathspec()
93d93537
NTND
236 *
237 * 'prefix' at #1 may be shorter than the command's prefix and
238 * it's ok for #2 to match extra files. Those extras will be
239 * trimmed at #3.
240 *
241 * Suppose the pathspec is 'foo' and '../bar' running from
242 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
243 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
244 * user does not want XYZ/foo, only the "foo" part should be
245 * case-insensitive. We need to filter out XYZ/foo here. In
246 * other words, we do not trust the caller on comparing the
247 * prefix part when :(icase) is involved. We do exact
248 * comparison ourselves.
249 *
250 * Normally the caller (common_prefix_len() in fact) does
251 * _exact_ matching on name[-prefix+1..-1] and we do not need
252 * to check that part. Be defensive and check it anyway, in
253 * case common_prefix_len is changed, or a new caller is
254 * introduced that does not use common_prefix_len.
255 *
256 * If the penalty turns out too high when prefix is really
257 * long, maybe change it to
258 * strncmp(match, name, item->prefix - prefix)
259 */
260 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
261 strncmp(item->match, name - prefix, item->prefix))
262 return 0;
263
61cf2820
NTND
264 /* If the match was just the prefix, we matched */
265 if (!*match)
266 return MATCHED_RECURSIVELY;
267
93d93537 268 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
269 if (matchlen == namelen)
270 return MATCHED_EXACTLY;
271
272 if (match[matchlen-1] == '/' || name[matchlen] == '/')
273 return MATCHED_RECURSIVELY;
68690fdd
NTND
274 } else if ((flags & DO_MATCH_DIRECTORY) &&
275 match[matchlen - 1] == '/' &&
276 namelen == matchlen - 1 &&
277 !ps_strncmp(item, match, name, namelen))
278 return MATCHED_EXACTLY;
61cf2820 279
5d74762d 280 if (item->nowildcard_len < item->len &&
bd30c2e4 281 !git_fnmatch(item, match, name,
8c6abbcd 282 item->nowildcard_len - prefix))
61cf2820
NTND
283 return MATCHED_FNMATCH;
284
75a6315f
BW
285 /* Perform checks to see if "name" is a super set of the pathspec */
286 if (flags & DO_MATCH_SUBMODULE) {
287 /* name is a literal prefix of the pathspec */
288 if ((namelen < matchlen) &&
289 (match[namelen] == '/') &&
290 !ps_strncmp(item, match, name, namelen))
291 return MATCHED_RECURSIVELY;
292
293 /* name" doesn't match up to the first wild character */
294 if (item->nowildcard_len < item->len &&
295 ps_strncmp(item, match, name,
296 item->nowildcard_len - prefix))
297 return 0;
298
299 /*
300 * Here is where we would perform a wildmatch to check if
301 * "name" can be matched as a directory (or a prefix) against
302 * the pathspec. Since wildmatch doesn't have this capability
303 * at the present we have to punt and say that it is a match,
304 * potentially returning a false positive
305 * The submodules themselves will be able to perform more
306 * accurate matching to determine if the pathspec matches.
307 */
308 return MATCHED_RECURSIVELY;
309 }
310
61cf2820
NTND
311 return 0;
312}
313
314/*
52ed1894
AS
315 * Given a name and a list of pathspecs, returns the nature of the
316 * closest (i.e. most specific) match of the name to any of the
317 * pathspecs.
318 *
319 * The caller typically calls this multiple times with the same
320 * pathspec and seen[] array but with different name/namelen
321 * (e.g. entries from the index) and is interested in seeing if and
322 * how each pathspec matches all the names it calls this function
323 * with. A mark is left in the seen[] array for each pathspec element
324 * indicating the closest type of match that element achieved, so if
325 * seen[n] remains zero after multiple invocations, that means the nth
326 * pathspec did not match any names, which could indicate that the
327 * user mistyped the nth pathspec.
61cf2820 328 */
854b0959
NTND
329static int do_match_pathspec(const struct pathspec *ps,
330 const char *name, int namelen,
331 int prefix, char *seen,
42b0874a 332 unsigned flags)
61cf2820 333{
42b0874a 334 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 335
5c6933d2
NTND
336 GUARD_PATHSPEC(ps,
337 PATHSPEC_FROMTOP |
338 PATHSPEC_MAXDEPTH |
bd30c2e4 339 PATHSPEC_LITERAL |
93d93537 340 PATHSPEC_GLOB |
ef79b1f8
NTND
341 PATHSPEC_ICASE |
342 PATHSPEC_EXCLUDE);
8f4f8f45 343
61cf2820 344 if (!ps->nr) {
6330a171
NTND
345 if (!ps->recursive ||
346 !(ps->magic & PATHSPEC_MAXDEPTH) ||
347 ps->max_depth == -1)
61cf2820
NTND
348 return MATCHED_RECURSIVELY;
349
350 if (within_depth(name, namelen, 0, ps->max_depth))
351 return MATCHED_EXACTLY;
352 else
353 return 0;
354 }
355
356 name += prefix;
357 namelen -= prefix;
358
359 for (i = ps->nr - 1; i >= 0; i--) {
360 int how;
ef79b1f8
NTND
361
362 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
363 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
364 continue;
365
61cf2820
NTND
366 if (seen && seen[i] == MATCHED_EXACTLY)
367 continue;
ef79b1f8
NTND
368 /*
369 * Make exclude patterns optional and never report
370 * "pathspec ':(exclude)foo' matches no files"
371 */
372 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
373 seen[i] = MATCHED_FNMATCH;
42b0874a
NTND
374 how = match_pathspec_item(ps->items+i, prefix, name,
375 namelen, flags);
6330a171
NTND
376 if (ps->recursive &&
377 (ps->magic & PATHSPEC_MAXDEPTH) &&
378 ps->max_depth != -1 &&
61cf2820
NTND
379 how && how != MATCHED_FNMATCH) {
380 int len = ps->items[i].len;
381 if (name[len] == '/')
382 len++;
383 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
384 how = MATCHED_EXACTLY;
385 else
386 how = 0;
387 }
388 if (how) {
389 if (retval < how)
390 retval = how;
391 if (seen && seen[i] < how)
392 seen[i] = how;
393 }
394 }
395 return retval;
396}
397
854b0959
NTND
398int match_pathspec(const struct pathspec *ps,
399 const char *name, int namelen,
ae8d0824 400 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
401{
402 int positive, negative;
ae8d0824 403 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
42b0874a
NTND
404 positive = do_match_pathspec(ps, name, namelen,
405 prefix, seen, flags);
ef79b1f8
NTND
406 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
407 return positive;
42b0874a
NTND
408 negative = do_match_pathspec(ps, name, namelen,
409 prefix, seen,
410 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
411 return negative ? 0 : positive;
412}
413
75a6315f
BW
414/**
415 * Check if a submodule is a superset of the pathspec
416 */
417int submodule_path_match(const struct pathspec *ps,
418 const char *submodule_name,
419 char *seen)
420{
421 int matched = do_match_pathspec(ps, submodule_name,
422 strlen(submodule_name),
423 0, seen,
424 DO_MATCH_DIRECTORY |
425 DO_MATCH_SUBMODULE);
426 return matched;
427}
428
777c55a6
JH
429int report_path_error(const char *ps_matched,
430 const struct pathspec *pathspec,
431 const char *prefix)
432{
433 /*
434 * Make sure all pathspec matched; otherwise it is an error.
435 */
777c55a6
JH
436 int num, errors = 0;
437 for (num = 0; num < pathspec->nr; num++) {
438 int other, found_dup;
439
440 if (ps_matched[num])
441 continue;
442 /*
443 * The caller might have fed identical pathspec
444 * twice. Do not barf on such a mistake.
445 * FIXME: parse_pathspec should have eliminated
446 * duplicate pathspec.
447 */
448 for (found_dup = other = 0;
449 !found_dup && other < pathspec->nr;
450 other++) {
451 if (other == num || !ps_matched[other])
452 continue;
453 if (!strcmp(pathspec->items[other].original,
454 pathspec->items[num].original))
455 /*
456 * Ok, we have a match already.
457 */
458 found_dup = 1;
459 }
460 if (found_dup)
461 continue;
462
463 error("pathspec '%s' did not match any file(s) known to git.",
464 pathspec->items[num].original);
465 errors++;
466 }
777c55a6
JH
467 return errors;
468}
469
fcd631ed
NTND
470/*
471 * Return the length of the "simple" part of a path match limiter.
472 */
87323bda 473int simple_length(const char *match)
fcd631ed
NTND
474{
475 int len = -1;
476
477 for (;;) {
478 unsigned char c = *match++;
479 len++;
480 if (c == '\0' || is_glob_special(c))
481 return len;
482 }
483}
484
87323bda 485int no_wildcard(const char *string)
68492fc7 486{
fcd631ed 487 return string[simple_length(string)] == '\0';
68492fc7
LK
488}
489
82dce998
NTND
490void parse_exclude_pattern(const char **pattern,
491 int *patternlen,
f8708998 492 unsigned *flags,
82dce998 493 int *nowildcardlen)
84460eec
NTND
494{
495 const char *p = *pattern;
496 size_t i, len;
497
498 *flags = 0;
499 if (*p == '!') {
500 *flags |= EXC_FLAG_NEGATIVE;
501 p++;
502 }
503 len = strlen(p);
504 if (len && p[len - 1] == '/') {
505 len--;
506 *flags |= EXC_FLAG_MUSTBEDIR;
507 }
508 for (i = 0; i < len; i++) {
509 if (p[i] == '/')
510 break;
511 }
512 if (i == len)
513 *flags |= EXC_FLAG_NODIR;
514 *nowildcardlen = simple_length(p);
515 /*
516 * we should have excluded the trailing slash from 'p' too,
517 * but that's one more allocation. Instead just make sure
518 * nowildcardlen does not exceed real patternlen
519 */
520 if (*nowildcardlen > len)
521 *nowildcardlen = len;
522 if (*p == '*' && no_wildcard(p + 1))
523 *flags |= EXC_FLAG_ENDSWITH;
524 *pattern = p;
525 *patternlen = len;
526}
527
453ec4bd 528void add_exclude(const char *string, const char *base,
c04318e4 529 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 530{
d6b8fc30 531 struct exclude *x;
84460eec 532 int patternlen;
f8708998 533 unsigned flags;
84460eec 534 int nowildcardlen;
453ec4bd 535
84460eec
NTND
536 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
537 if (flags & EXC_FLAG_MUSTBEDIR) {
96ffc06f 538 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
d6b8fc30
JH
539 } else {
540 x = xmalloc(sizeof(*x));
541 x->pattern = string;
542 }
84460eec
NTND
543 x->patternlen = patternlen;
544 x->nowildcardlen = nowildcardlen;
453ec4bd
LT
545 x->base = base;
546 x->baselen = baselen;
d6b8fc30 547 x->flags = flags;
c04318e4 548 x->srcpos = srcpos;
840fc334
AS
549 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
550 el->excludes[el->nr++] = x;
c04318e4 551 x->el = el;
453ec4bd
LT
552}
553
55fe6f51
NTND
554static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
555 struct sha1_stat *sha1_stat)
c28b3d6e
NTND
556{
557 int pos, len;
558 unsigned long sz;
559 enum object_type type;
560 void *data;
c28b3d6e
NTND
561
562 len = strlen(path);
71261027 563 pos = cache_name_pos(path, len);
c28b3d6e
NTND
564 if (pos < 0)
565 return NULL;
71261027 566 if (!ce_skip_worktree(active_cache[pos]))
c28b3d6e 567 return NULL;
99d1a986 568 data = read_sha1_file(active_cache[pos]->oid.hash, &type, &sz);
c28b3d6e
NTND
569 if (!data || type != OBJ_BLOB) {
570 free(data);
571 return NULL;
572 }
573 *size = xsize_t(sz);
55fe6f51
NTND
574 if (sha1_stat) {
575 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
99d1a986 576 hashcpy(sha1_stat->sha1, active_cache[pos]->oid.hash);
55fe6f51 577 }
c28b3d6e
NTND
578 return data;
579}
580
f6198812
AS
581/*
582 * Frees memory within el which was allocated for exclude patterns and
583 * the file buffer. Does not free el itself.
584 */
585void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
586{
587 int i;
588
5cee3493 589 for (i = 0; i < el->nr; i++)
0fd0e241
NTND
590 free(el->excludes[i]);
591 free(el->excludes);
c082df24 592 free(el->filebuf);
0fd0e241 593
2653a8c6 594 memset(el, 0, sizeof(*el));
0fd0e241
NTND
595}
596
7e2e4b37 597static void trim_trailing_spaces(char *buf)
16402b99 598{
e61a6c1d
PB
599 char *p, *last_space = NULL;
600
601 for (p = buf; *p; p++)
602 switch (*p) {
603 case ' ':
604 if (!last_space)
605 last_space = p;
606 break;
607 case '\\':
608 p++;
609 if (!*p)
610 return;
611 /* fallthrough */
612 default:
613 last_space = NULL;
614 }
615
616 if (last_space)
617 *last_space = '\0';
16402b99
NTND
618}
619
0dcb8d7f
NTND
620/*
621 * Given a subdirectory name and "dir" of the current directory,
622 * search the subdir in "dir" and return it, or create a new one if it
623 * does not exist in "dir".
624 *
625 * If "name" has the trailing slash, it'll be excluded in the search.
626 */
627static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
628 struct untracked_cache_dir *dir,
629 const char *name, int len)
630{
631 int first, last;
632 struct untracked_cache_dir *d;
633 if (!dir)
634 return NULL;
635 if (len && name[len - 1] == '/')
636 len--;
637 first = 0;
638 last = dir->dirs_nr;
639 while (last > first) {
640 int cmp, next = (last + first) >> 1;
641 d = dir->dirs[next];
642 cmp = strncmp(name, d->name, len);
643 if (!cmp && strlen(d->name) > len)
644 cmp = -1;
645 if (!cmp)
646 return d;
647 if (cmp < 0) {
648 last = next;
649 continue;
650 }
651 first = next+1;
652 }
653
654 uc->dir_created++;
96ffc06f 655 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
656
657 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
658 memmove(dir->dirs + first + 1, dir->dirs + first,
659 (dir->dirs_nr - first) * sizeof(*dir->dirs));
660 dir->dirs_nr++;
661 dir->dirs[first] = d;
662 return d;
663}
664
ccad261f
NTND
665static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
666{
667 int i;
668 dir->valid = 0;
669 dir->untracked_nr = 0;
670 for (i = 0; i < dir->dirs_nr; i++)
671 do_invalidate_gitignore(dir->dirs[i]);
672}
673
674static void invalidate_gitignore(struct untracked_cache *uc,
675 struct untracked_cache_dir *dir)
676{
677 uc->gitignore_invalidated++;
678 do_invalidate_gitignore(dir);
679}
680
91a2288b
NTND
681static void invalidate_directory(struct untracked_cache *uc,
682 struct untracked_cache_dir *dir)
683{
26cb0182 684 int i;
91a2288b
NTND
685 uc->dir_invalidated++;
686 dir->valid = 0;
687 dir->untracked_nr = 0;
26cb0182
NTND
688 for (i = 0; i < dir->dirs_nr; i++)
689 dir->dirs[i]->recurse = 0;
91a2288b
NTND
690}
691
55fe6f51
NTND
692/*
693 * Given a file with name "fname", read it (either from disk, or from
694 * the index if "check_index" is non-zero), parse it and store the
695 * exclude rules in "el".
696 *
697 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
698 * stat data from disk (only valid if add_excludes returns zero). If
699 * ss_valid is non-zero, "ss" must contain good value as input.
700 */
701static int add_excludes(const char *fname, const char *base, int baselen,
702 struct exclude_list *el, int check_index,
703 struct sha1_stat *sha1_stat)
453ec4bd 704{
c470701a 705 struct stat st;
c04318e4 706 int fd, i, lineno = 1;
9d14017a 707 size_t size = 0;
453ec4bd
LT
708 char *buf, *entry;
709
710 fd = open(fname, O_RDONLY);
c28b3d6e 711 if (fd < 0 || fstat(fd, &st) < 0) {
69660731 712 if (errno != ENOENT)
55b38a48 713 warn_on_inaccessible(fname);
c28b3d6e
NTND
714 if (0 <= fd)
715 close(fd);
716 if (!check_index ||
55fe6f51 717 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
c28b3d6e 718 return -1;
45d76f17
NTND
719 if (size == 0) {
720 free(buf);
721 return 0;
722 }
723 if (buf[size-1] != '\n') {
50a6c8ef 724 buf = xrealloc(buf, st_add(size, 1));
45d76f17
NTND
725 buf[size++] = '\n';
726 }
d961baa8 727 } else {
c28b3d6e
NTND
728 size = xsize_t(st.st_size);
729 if (size == 0) {
55fe6f51
NTND
730 if (sha1_stat) {
731 fill_stat_data(&sha1_stat->stat, &st);
732 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
733 sha1_stat->valid = 1;
734 }
c28b3d6e
NTND
735 close(fd);
736 return 0;
737 }
3733e694 738 buf = xmallocz(size);
c28b3d6e 739 if (read_in_full(fd, buf, size) != size) {
45d76f17 740 free(buf);
c28b3d6e
NTND
741 close(fd);
742 return -1;
743 }
45d76f17 744 buf[size++] = '\n';
c28b3d6e 745 close(fd);
55fe6f51
NTND
746 if (sha1_stat) {
747 int pos;
748 if (sha1_stat->valid &&
ed4efab1 749 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st))
55fe6f51
NTND
750 ; /* no content change, ss->sha1 still good */
751 else if (check_index &&
752 (pos = cache_name_pos(fname, strlen(fname))) >= 0 &&
753 !ce_stage(active_cache[pos]) &&
754 ce_uptodate(active_cache[pos]) &&
755 !would_convert_to_git(fname))
99d1a986 756 hashcpy(sha1_stat->sha1,
757 active_cache[pos]->oid.hash);
55fe6f51
NTND
758 else
759 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
760 fill_stat_data(&sha1_stat->stat, &st);
761 sha1_stat->valid = 1;
762 }
6ba78238 763 }
453ec4bd 764
c082df24 765 el->filebuf = buf;
245e1c19 766
dde843e7
JH
767 if (skip_utf8_bom(&buf, size))
768 size -= buf - el->filebuf;
769
453ec4bd 770 entry = buf;
245e1c19 771
45d76f17
NTND
772 for (i = 0; i < size; i++) {
773 if (buf[i] == '\n') {
453ec4bd
LT
774 if (entry != buf + i && entry[0] != '#') {
775 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 776 trim_trailing_spaces(entry);
c04318e4 777 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 778 }
c04318e4 779 lineno++;
453ec4bd
LT
780 entry = buf + i + 1;
781 }
782 }
783 return 0;
453ec4bd
LT
784}
785
55fe6f51
NTND
786int add_excludes_from_file_to_list(const char *fname, const char *base,
787 int baselen, struct exclude_list *el,
788 int check_index)
789{
790 return add_excludes(fname, base, baselen, el, check_index, NULL);
791}
792
c04318e4
AS
793struct exclude_list *add_exclude_list(struct dir_struct *dir,
794 int group_type, const char *src)
c082df24
AS
795{
796 struct exclude_list *el;
797 struct exclude_list_group *group;
798
799 group = &dir->exclude_list_group[group_type];
800 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
801 el = &group->el[group->nr++];
802 memset(el, 0, sizeof(*el));
c04318e4 803 el->src = src;
c082df24
AS
804 return el;
805}
806
807/*
808 * Used to set up core.excludesfile and .git/info/exclude lists.
809 */
0dcb8d7f
NTND
810static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
811 struct sha1_stat *sha1_stat)
453ec4bd 812{
c082df24 813 struct exclude_list *el;
ccad261f
NTND
814 /*
815 * catch setup_standard_excludes() that's called before
816 * dir->untracked is assigned. That function behaves
817 * differently when dir->untracked is non-NULL.
818 */
819 if (!dir->untracked)
820 dir->unmanaged_exclude_files++;
c04318e4 821 el = add_exclude_list(dir, EXC_FILE, fname);
0dcb8d7f 822 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0)
453ec4bd
LT
823 die("cannot use %s as an exclude file", fname);
824}
825
0dcb8d7f
NTND
826void add_excludes_from_file(struct dir_struct *dir, const char *fname)
827{
ccad261f 828 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
829 add_excludes_from_file_1(dir, fname, NULL);
830}
831
82dce998
NTND
832int match_basename(const char *basename, int basenamelen,
833 const char *pattern, int prefix, int patternlen,
f8708998 834 unsigned flags)
593cb880
NTND
835{
836 if (prefix == patternlen) {
0b6e56df 837 if (patternlen == basenamelen &&
ba0897e6 838 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
839 return 1;
840 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 841 /* "*literal" matching against "fooliteral" */
593cb880 842 if (patternlen - 1 <= basenamelen &&
ba0897e6 843 !fspathncmp(pattern + 1,
0b6e56df
JH
844 basename + basenamelen - (patternlen - 1),
845 patternlen - 1))
593cb880
NTND
846 return 1;
847 } else {
0b6e56df
JH
848 if (fnmatch_icase_mem(pattern, patternlen,
849 basename, basenamelen,
850 0) == 0)
593cb880
NTND
851 return 1;
852 }
853 return 0;
854}
855
82dce998
NTND
856int match_pathname(const char *pathname, int pathlen,
857 const char *base, int baselen,
858 const char *pattern, int prefix, int patternlen,
f8708998 859 unsigned flags)
b5592632
NTND
860{
861 const char *name;
862 int namelen;
863
864 /*
865 * match with FNM_PATHNAME; the pattern has base implicitly
866 * in front of it.
867 */
868 if (*pattern == '/') {
869 pattern++;
982ac873 870 patternlen--;
b5592632
NTND
871 prefix--;
872 }
873
874 /*
875 * baselen does not count the trailing slash. base[] may or
876 * may not end with a trailing slash though.
877 */
878 if (pathlen < baselen + 1 ||
879 (baselen && pathname[baselen] != '/') ||
ba0897e6 880 fspathncmp(pathname, base, baselen))
b5592632
NTND
881 return 0;
882
883 namelen = baselen ? pathlen - baselen - 1 : pathlen;
884 name = pathname + pathlen - namelen;
885
886 if (prefix) {
887 /*
888 * if the non-wildcard part is longer than the
889 * remaining pathname, surely it cannot match.
890 */
891 if (prefix > namelen)
892 return 0;
893
ba0897e6 894 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
895 return 0;
896 pattern += prefix;
ab3aebc1 897 patternlen -= prefix;
b5592632
NTND
898 name += prefix;
899 namelen -= prefix;
ab3aebc1
JK
900
901 /*
902 * If the whole pattern did not have a wildcard,
903 * then our prefix match is all we need; we
904 * do not need to call fnmatch at all.
905 */
5cee3493 906 if (!patternlen && !namelen)
ab3aebc1 907 return 1;
b5592632
NTND
908 }
909
ab3aebc1
JK
910 return fnmatch_icase_mem(pattern, patternlen,
911 name, namelen,
f30366b2 912 WM_PATHNAME) == 0;
b5592632
NTND
913}
914
578cd7c3
AS
915/*
916 * Scan the given exclude list in reverse to see whether pathname
917 * should be ignored. The first match (i.e. the last on the list), if
918 * any, determines the fate. Returns the exclude_list element which
919 * matched, or NULL for undecided.
453ec4bd 920 */
578cd7c3
AS
921static struct exclude *last_exclude_matching_from_list(const char *pathname,
922 int pathlen,
923 const char *basename,
924 int *dtype,
925 struct exclude_list *el)
453ec4bd 926{
e6efecc4 927 struct exclude *exc = NULL; /* undecided */
5cee3493 928 int i;
453ec4bd 929
35a94d44 930 if (!el->nr)
578cd7c3 931 return NULL; /* undefined */
d6b8fc30 932
35a94d44
NTND
933 for (i = el->nr - 1; 0 <= i; i--) {
934 struct exclude *x = el->excludes[i];
b5592632 935 const char *exclude = x->pattern;
b5592632 936 int prefix = x->nowildcardlen;
35a94d44
NTND
937
938 if (x->flags & EXC_FLAG_MUSTBEDIR) {
939 if (*dtype == DT_UNKNOWN)
940 *dtype = get_dtype(NULL, pathname, pathlen);
941 if (*dtype != DT_DIR)
942 continue;
943 }
d6b8fc30 944
35a94d44 945 if (x->flags & EXC_FLAG_NODIR) {
593cb880
NTND
946 if (match_basename(basename,
947 pathlen - (basename - pathname),
948 exclude, prefix, x->patternlen,
e6efecc4
NTND
949 x->flags)) {
950 exc = x;
951 break;
952 }
35a94d44
NTND
953 continue;
954 }
955
b5592632
NTND
956 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
957 if (match_pathname(pathname, pathlen,
958 x->base, x->baselen ? x->baselen - 1 : 0,
e6efecc4
NTND
959 exclude, prefix, x->patternlen, x->flags)) {
960 exc = x;
961 break;
962 }
453ec4bd 963 }
e6efecc4 964 return exc;
578cd7c3
AS
965}
966
967/*
968 * Scan the list and let the last match determine the fate.
969 * Return 1 for exclude, 0 for include and -1 for undecided.
970 */
971int is_excluded_from_list(const char *pathname,
972 int pathlen, const char *basename, int *dtype,
973 struct exclude_list *el)
974{
975 struct exclude *exclude;
976 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);
977 if (exclude)
978 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
979 return -1; /* undecided */
980}
981
46aa2f95
KB
982static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
983 const char *pathname, int pathlen, const char *basename,
984 int *dtype_p)
985{
986 int i, j;
987 struct exclude_list_group *group;
988 struct exclude *exclude;
989 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
990 group = &dir->exclude_list_group[i];
991 for (j = group->nr - 1; j >= 0; j--) {
992 exclude = last_exclude_matching_from_list(
993 pathname, pathlen, basename, dtype_p,
994 &group->el[j]);
995 if (exclude)
996 return exclude;
997 }
998 }
999 return NULL;
1000}
1001
6cd5c582
KB
1002/*
1003 * Loads the per-directory exclude list for the substring of base
1004 * which has a char length of baselen.
1005 */
1006static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
1007{
1008 struct exclude_list_group *group;
1009 struct exclude_list *el;
1010 struct exclude_stack *stk = NULL;
0dcb8d7f 1011 struct untracked_cache_dir *untracked;
6cd5c582
KB
1012 int current;
1013
6cd5c582
KB
1014 group = &dir->exclude_list_group[EXC_DIRS];
1015
d961baa8
NTND
1016 /*
1017 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 1018 * which originate from directories not in the prefix of the
d961baa8
NTND
1019 * path being checked.
1020 */
6cd5c582
KB
1021 while ((stk = dir->exclude_stack) != NULL) {
1022 if (stk->baselen <= baselen &&
aceb9429 1023 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
1024 break;
1025 el = &group->el[dir->exclude_stack->exclude_ix];
1026 dir->exclude_stack = stk->prev;
95c6f271 1027 dir->exclude = NULL;
aceb9429 1028 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
1029 clear_exclude_list(el);
1030 free(stk);
1031 group->nr--;
1032 }
1033
95c6f271
KB
1034 /* Skip traversing into sub directories if the parent is excluded */
1035 if (dir->exclude)
1036 return;
1037
aceb9429
NTND
1038 /*
1039 * Lazy initialization. All call sites currently just
1040 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1041 * them seems lots of work for little benefit.
1042 */
1043 if (!dir->basebuf.buf)
1044 strbuf_init(&dir->basebuf, PATH_MAX);
1045
6cd5c582
KB
1046 /* Read from the parent directories and push them down. */
1047 current = stk ? stk->baselen : -1;
aceb9429 1048 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1049 if (dir->untracked)
1050 untracked = stk ? stk->ucd : dir->untracked->root;
1051 else
1052 untracked = NULL;
1053
6cd5c582 1054 while (current < baselen) {
6cd5c582 1055 const char *cp;
0dcb8d7f 1056 struct sha1_stat sha1_stat;
6cd5c582 1057
03e11a71 1058 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1059 if (current < 0) {
1060 cp = base;
1061 current = 0;
d961baa8 1062 } else {
6cd5c582
KB
1063 cp = strchr(base + current + 1, '/');
1064 if (!cp)
1065 die("oops in prep_exclude");
1066 cp++;
0dcb8d7f
NTND
1067 untracked =
1068 lookup_untracked(dir->untracked, untracked,
1069 base + current,
1070 cp - base - current);
6cd5c582
KB
1071 }
1072 stk->prev = dir->exclude_stack;
1073 stk->baselen = cp - base;
95c6f271 1074 stk->exclude_ix = group->nr;
0dcb8d7f 1075 stk->ucd = untracked;
95c6f271 1076 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1077 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1078 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1079
1080 /* Abort if the directory is excluded */
1081 if (stk->baselen) {
1082 int dt = DT_DIR;
aceb9429 1083 dir->basebuf.buf[stk->baselen - 1] = 0;
95c6f271 1084 dir->exclude = last_exclude_matching_from_lists(dir,
aceb9429
NTND
1085 dir->basebuf.buf, stk->baselen - 1,
1086 dir->basebuf.buf + current, &dt);
1087 dir->basebuf.buf[stk->baselen - 1] = '/';
c3c327de
KB
1088 if (dir->exclude &&
1089 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1090 dir->exclude = NULL;
95c6f271 1091 if (dir->exclude) {
95c6f271
KB
1092 dir->exclude_stack = stk;
1093 return;
1094 }
1095 }
1096
aceb9429 1097 /* Try to read per-directory file */
0dcb8d7f
NTND
1098 hashclr(sha1_stat.sha1);
1099 sha1_stat.valid = 0;
27b099ae
NTND
1100 if (dir->exclude_per_dir &&
1101 /*
1102 * If we know that no files have been added in
1103 * this directory (i.e. valid_cached_dir() has
1104 * been executed and set untracked->valid) ..
1105 */
1106 (!untracked || !untracked->valid ||
1107 /*
1108 * .. and .gitignore does not exist before
7687252f
DT
1109 * (i.e. null exclude_sha1). Then we can skip
1110 * loading .gitignore, which would result in
1111 * ENOENT anyway.
27b099ae
NTND
1112 */
1113 !is_null_sha1(untracked->exclude_sha1))) {
95c6f271
KB
1114 /*
1115 * dir->basebuf gets reused by the traversal, but we
1116 * need fname to remain unchanged to ensure the src
1117 * member of each struct exclude correctly
1118 * back-references its source file. Other invocations
1119 * of add_exclude_list provide stable strings, so we
aceb9429 1120 * strbuf_detach() and free() here in the caller.
95c6f271 1121 */
aceb9429
NTND
1122 struct strbuf sb = STRBUF_INIT;
1123 strbuf_addbuf(&sb, &dir->basebuf);
1124 strbuf_addstr(&sb, dir->exclude_per_dir);
1125 el->src = strbuf_detach(&sb, NULL);
0dcb8d7f
NTND
1126 add_excludes(el->src, el->src, stk->baselen, el, 1,
1127 untracked ? &sha1_stat : NULL);
1128 }
5ebf79ad
NTND
1129 /*
1130 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1131 * will first be called in valid_cached_dir() then maybe many
1132 * times more in last_exclude_matching(). When the cache is
1133 * used, last_exclude_matching() will not be called and
1134 * reading .gitignore content will be a waste.
1135 *
1136 * So when it's called by valid_cached_dir() and we can get
1137 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1138 * modified on work tree), we could delay reading the
1139 * .gitignore content until we absolutely need it in
1140 * last_exclude_matching(). Be careful about ignore rule
1141 * order, though, if you do that.
1142 */
1143 if (untracked &&
1144 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1145 invalidate_gitignore(dir->untracked, untracked);
0dcb8d7f 1146 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
95c6f271 1147 }
6cd5c582
KB
1148 dir->exclude_stack = stk;
1149 current = stk->baselen;
1150 }
aceb9429 1151 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1152}
1153
f4cd69a6
AS
1154/*
1155 * Loads the exclude lists for the directory containing pathname, then
1156 * scans all exclude lists to determine whether pathname is excluded.
1157 * Returns the exclude_list element which matched, or NULL for
1158 * undecided.
1159 */
b07bc8c8 1160struct exclude *last_exclude_matching(struct dir_struct *dir,
f4cd69a6
AS
1161 const char *pathname,
1162 int *dtype_p)
453ec4bd
LT
1163{
1164 int pathlen = strlen(pathname);
68492fc7
LK
1165 const char *basename = strrchr(pathname, '/');
1166 basename = (basename) ? basename+1 : pathname;
453ec4bd 1167
63d285c8 1168 prep_exclude(dir, pathname, basename-pathname);
c082df24 1169
95c6f271
KB
1170 if (dir->exclude)
1171 return dir->exclude;
1172
46aa2f95
KB
1173 return last_exclude_matching_from_lists(dir, pathname, pathlen,
1174 basename, dtype_p);
f4cd69a6
AS
1175}
1176
1177/*
1178 * Loads the exclude lists for the directory containing pathname, then
1179 * scans all exclude lists to determine whether pathname is excluded.
1180 * Returns 1 if true, otherwise 0.
1181 */
b07bc8c8 1182int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
f4cd69a6
AS
1183{
1184 struct exclude *exclude =
1185 last_exclude_matching(dir, pathname, dtype_p);
1186 if (exclude)
1187 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1188 return 0;
1189}
1190
f3fa1838
JH
1191static struct dir_entry *dir_entry_new(const char *pathname, int len)
1192{
453ec4bd
LT
1193 struct dir_entry *ent;
1194
96ffc06f 1195 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1196 ent->len = len;
4d06f8ac 1197 return ent;
453ec4bd
LT
1198}
1199
159b3212 1200static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
6815e569 1201{
ebbd7439 1202 if (cache_file_exists(pathname, len, ignore_case))
6815e569
JK
1203 return NULL;
1204
25fd2f7a 1205 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1206 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1207}
1208
108da0db 1209struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)
2abd31b0 1210{
6e4f981f 1211 if (!cache_name_is_other(pathname, len))
2abd31b0
JK
1212 return NULL;
1213
25fd2f7a 1214 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1215 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1216}
1217
09595258
LT
1218enum exist_status {
1219 index_nonexistent = 0,
1220 index_directory,
4b05548f 1221 index_gitdir
09595258
LT
1222};
1223
5102c617 1224/*
71261027 1225 * Do not use the alphabetically sorted index to look up
5102c617 1226 * the directory name; instead, use the case insensitive
ebbd7439 1227 * directory hash.
5102c617
JJ
1228 */
1229static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
1230{
41284eb0 1231 struct cache_entry *ce;
5102c617 1232
41284eb0 1233 if (cache_dir_exists(dirname, len))
5102c617
JJ
1234 return index_directory;
1235
41284eb0
DT
1236 ce = cache_file_exists(dirname, len, ignore_case);
1237 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1238 return index_gitdir;
1239
5102c617
JJ
1240 return index_nonexistent;
1241}
1242
09595258
LT
1243/*
1244 * The index sorts alphabetically by entry name, which
1245 * means that a gitlink sorts as '\0' at the end, while
1246 * a directory (which is defined not as an entry, but as
1247 * the files it contains) will sort with the '/' at the
1248 * end.
1249 */
1250static enum exist_status directory_exists_in_index(const char *dirname, int len)
453ec4bd 1251{
5102c617
JJ
1252 int pos;
1253
1254 if (ignore_case)
1255 return directory_exists_in_index_icase(dirname, len);
1256
1257 pos = cache_name_pos(dirname, len);
09595258
LT
1258 if (pos < 0)
1259 pos = -pos-1;
1260 while (pos < active_nr) {
9c5e6c80 1261 const struct cache_entry *ce = active_cache[pos++];
09595258
LT
1262 unsigned char endchar;
1263
1264 if (strncmp(ce->name, dirname, len))
1265 break;
1266 endchar = ce->name[len];
1267 if (endchar > '/')
1268 break;
1269 if (endchar == '/')
1270 return index_directory;
7a51ed66 1271 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1272 return index_gitdir;
1273 }
1274 return index_nonexistent;
1275}
1276
1277/*
1278 * When we find a directory when traversing the filesystem, we
1279 * have three distinct cases:
1280 *
1281 * - ignore it
1282 * - see it as a directory
1283 * - recurse into it
1284 *
1285 * and which one we choose depends on a combination of existing
1286 * git index contents and the flags passed into the directory
1287 * traversal routine.
1288 *
1289 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1290 * directory name, we always recurse into the directory to see
1291 * all the files.
09595258
LT
1292 *
1293 * Case 2: If we *already* have that directory name as a gitlink,
1294 * we always continue to see it as a gitlink, regardless of whether
1295 * there is an actual git directory there or not (it might not
1296 * be checked out as a subproject!)
1297 *
1298 * Case 3: if we didn't have it in the index previously, we
1299 * have a few sub-cases:
1300 *
1301 * (a) if "show_other_directories" is true, we show it as
1302 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1303 * also true, in which case we need to check if it contains any
1304 * untracked and / or ignored files.
09595258 1305 * (b) if it looks like a git directory, and we don't have
302b9282 1306 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1307 * as a directory.
1308 * (c) otherwise, we recurse into it.
1309 */
defd7c7b 1310static enum path_treatment treat_directory(struct dir_struct *dir,
0dcb8d7f 1311 struct untracked_cache_dir *untracked,
2e5910f2 1312 const char *dirname, int len, int baselen, int exclude,
e1b8c7bd 1313 const struct pathspec *pathspec)
09595258
LT
1314{
1315 /* The "len-1" is to strip the final '/' */
1316 switch (directory_exists_in_index(dirname, len-1)) {
1317 case index_directory:
defd7c7b 1318 return path_recurse;
09595258
LT
1319
1320 case index_gitdir:
26c986e1 1321 return path_none;
09595258
LT
1322
1323 case index_nonexistent:
7c4c97c0 1324 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1325 break;
7c4c97c0 1326 if (!(dir->flags & DIR_NO_GITLINKS)) {
09595258
LT
1327 unsigned char sha1[20];
1328 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
defd7c7b 1329 return path_untracked;
09595258 1330 }
defd7c7b 1331 return path_recurse;
09595258
LT
1332 }
1333
1334 /* This is the "show_other_directories" case */
721ac4ed 1335
184d2a8e 1336 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1337 return exclude ? path_excluded : path_untracked;
1338
2e5910f2
DT
1339 untracked = lookup_untracked(dir->untracked, untracked,
1340 dirname + baselen, len - baselen);
0dcb8d7f 1341 return read_directory_recursive(dir, dirname, len,
e1b8c7bd 1342 untracked, 1, pathspec);
453ec4bd
LT
1343}
1344
9fc42d60
LT
1345/*
1346 * This is an inexact early pruning of any recursive directory
1347 * reading - if the path cannot possibly be in the pathspec,
1348 * return true, and we'll skip it early.
1349 */
e1b8c7bd
BW
1350static int simplify_away(const char *path, int pathlen,
1351 const struct pathspec *pathspec)
9fc42d60 1352{
e1b8c7bd 1353 int i;
9fc42d60 1354
e1b8c7bd
BW
1355 if (!pathspec || !pathspec->nr)
1356 return 0;
1357
1358 GUARD_PATHSPEC(pathspec,
1359 PATHSPEC_FROMTOP |
1360 PATHSPEC_MAXDEPTH |
1361 PATHSPEC_LITERAL |
1362 PATHSPEC_GLOB |
1363 PATHSPEC_ICASE |
1364 PATHSPEC_EXCLUDE);
1365
1366 for (i = 0; i < pathspec->nr; i++) {
1367 const struct pathspec_item *item = &pathspec->items[i];
1368 int len = item->nowildcard_len;
1369
1370 if (len > pathlen)
1371 len = pathlen;
1372 if (!ps_strncmp(item, item->match, path, len))
1373 return 0;
9fc42d60 1374 }
e1b8c7bd
BW
1375
1376 return 1;
9fc42d60
LT
1377}
1378
29209cbe
JK
1379/*
1380 * This function tells us whether an excluded path matches a
1381 * list of "interesting" pathspecs. That is, whether a path matched
1382 * by any of the pathspecs could possibly be ignored by excluding
1383 * the specified path. This can happen if:
1384 *
1385 * 1. the path is mentioned explicitly in the pathspec
1386 *
1387 * 2. the path is a directory prefix of some element in the
1388 * pathspec
1389 */
e1b8c7bd
BW
1390static int exclude_matches_pathspec(const char *path, int pathlen,
1391 const struct pathspec *pathspec)
1392{
1393 int i;
1394
1395 if (!pathspec || !pathspec->nr)
1396 return 0;
1397
1398 GUARD_PATHSPEC(pathspec,
1399 PATHSPEC_FROMTOP |
1400 PATHSPEC_MAXDEPTH |
1401 PATHSPEC_LITERAL |
1402 PATHSPEC_GLOB |
1403 PATHSPEC_ICASE |
1404 PATHSPEC_EXCLUDE);
1405
1406 for (i = 0; i < pathspec->nr; i++) {
1407 const struct pathspec_item *item = &pathspec->items[i];
1408 int len = item->nowildcard_len;
1409
1410 if (len == pathlen &&
1411 !ps_strncmp(item, item->match, path, pathlen))
1412 return 1;
1413 if (len > pathlen &&
1414 item->match[pathlen] == '/' &&
1415 !ps_strncmp(item, item->match, path, pathlen))
1416 return 1;
e96980ef
JK
1417 }
1418 return 0;
1419}
1420
443e061a
LT
1421static int get_index_dtype(const char *path, int len)
1422{
1423 int pos;
9c5e6c80 1424 const struct cache_entry *ce;
443e061a 1425
ebbd7439 1426 ce = cache_file_exists(path, len, 0);
443e061a
LT
1427 if (ce) {
1428 if (!ce_uptodate(ce))
1429 return DT_UNKNOWN;
1430 if (S_ISGITLINK(ce->ce_mode))
1431 return DT_DIR;
1432 /*
1433 * Nobody actually cares about the
1434 * difference between DT_LNK and DT_REG
1435 */
1436 return DT_REG;
1437 }
1438
1439 /* Try to look it up as a directory */
1440 pos = cache_name_pos(path, len);
1441 if (pos >= 0)
1442 return DT_UNKNOWN;
1443 pos = -pos-1;
1444 while (pos < active_nr) {
1445 ce = active_cache[pos++];
1446 if (strncmp(ce->name, path, len))
1447 break;
1448 if (ce->name[len] > '/')
1449 break;
1450 if (ce->name[len] < '/')
1451 continue;
1452 if (!ce_uptodate(ce))
1453 break; /* continue? */
1454 return DT_DIR;
1455 }
1456 return DT_UNKNOWN;
1457}
1458
caa6b782 1459static int get_dtype(struct dirent *de, const char *path, int len)
07134421 1460{
6831a88a 1461 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1462 struct stat st;
1463
1464 if (dtype != DT_UNKNOWN)
1465 return dtype;
443e061a
LT
1466 dtype = get_index_dtype(path, len);
1467 if (dtype != DT_UNKNOWN)
1468 return dtype;
1469 if (lstat(path, &st))
07134421
LT
1470 return dtype;
1471 if (S_ISREG(st.st_mode))
1472 return DT_REG;
1473 if (S_ISDIR(st.st_mode))
1474 return DT_DIR;
1475 if (S_ISLNK(st.st_mode))
1476 return DT_LNK;
1477 return dtype;
1478}
1479
16e2cfa9 1480static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1481 struct untracked_cache_dir *untracked,
49dc2cc2 1482 struct strbuf *path,
2e5910f2 1483 int baselen,
e1b8c7bd 1484 const struct pathspec *pathspec,
16e2cfa9 1485 int dtype, struct dirent *de)
53cc5356 1486{
8aaf8d77 1487 int exclude;
ebbd7439 1488 int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);
2eac2a4c 1489
8aaf8d77
KB
1490 if (dtype == DT_UNKNOWN)
1491 dtype = get_dtype(de, path->buf, path->len);
1492
1493 /* Always exclude indexed files */
2eac2a4c 1494 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1495 return path_none;
8aaf8d77 1496
2eac2a4c
JH
1497 /*
1498 * When we are looking at a directory P in the working tree,
1499 * there are three cases:
1500 *
1501 * (1) P exists in the index. Everything inside the directory P in
1502 * the working tree needs to go when P is checked out from the
1503 * index.
1504 *
1505 * (2) P does not exist in the index, but there is P/Q in the index.
1506 * We know P will stay a directory when we check out the contents
1507 * of the index, but we do not know yet if there is a directory
1508 * P/Q in the working tree to be killed, so we need to recurse.
1509 *
1510 * (3) P does not exist in the index, and there is no P/Q in the index
1511 * to require P to be a directory, either. Only in this case, we
1512 * know that everything inside P will not be killed without
1513 * recursing.
1514 */
1515 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1516 (dtype == DT_DIR) &&
de372b1b
ES
1517 !has_path_in_index &&
1518 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))
1519 return path_none;
8aaf8d77
KB
1520
1521 exclude = is_excluded(dir, path->buf, &dtype);
53cc5356
JH
1522
1523 /*
1524 * Excluded? If we don't explicitly want to show
1525 * ignored files, ignore it
1526 */
0aaf62b6 1527 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1528 return path_excluded;
53cc5356 1529
53cc5356
JH
1530 switch (dtype) {
1531 default:
defd7c7b 1532 return path_none;
53cc5356 1533 case DT_DIR:
49dc2cc2 1534 strbuf_addch(path, '/');
2e5910f2 1535 return treat_directory(dir, untracked, path->buf, path->len,
e1b8c7bd 1536 baselen, exclude, pathspec);
53cc5356
JH
1537 case DT_REG:
1538 case DT_LNK:
defd7c7b 1539 return exclude ? path_excluded : path_untracked;
53cc5356 1540 }
53cc5356
JH
1541}
1542
91a2288b
NTND
1543static enum path_treatment treat_path_fast(struct dir_struct *dir,
1544 struct untracked_cache_dir *untracked,
1545 struct cached_dir *cdir,
1546 struct strbuf *path,
1547 int baselen,
e1b8c7bd 1548 const struct pathspec *pathspec)
91a2288b
NTND
1549{
1550 strbuf_setlen(path, baselen);
1551 if (!cdir->ucd) {
1552 strbuf_addstr(path, cdir->file);
1553 return path_untracked;
1554 }
1555 strbuf_addstr(path, cdir->ucd->name);
1556 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1557 strbuf_complete(path, '/');
91a2288b
NTND
1558 if (cdir->ucd->check_only)
1559 /*
1560 * check_only is set as a result of treat_directory() getting
1561 * to its bottom. Verify again the same set of directories
1562 * with check_only set.
1563 */
1564 return read_directory_recursive(dir, path->buf, path->len,
e1b8c7bd 1565 cdir->ucd, 1, pathspec);
91a2288b
NTND
1566 /*
1567 * We get path_recurse in the first run when
1568 * directory_exists_in_index() returns index_nonexistent. We
1569 * are sure that new changes in the index does not impact the
1570 * outcome. Return now.
1571 */
1572 return path_recurse;
1573}
1574
16e2cfa9 1575static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1576 struct untracked_cache_dir *untracked,
cf7c6148 1577 struct cached_dir *cdir,
49dc2cc2 1578 struct strbuf *path,
16e2cfa9 1579 int baselen,
e1b8c7bd 1580 const struct pathspec *pathspec)
16e2cfa9
JH
1581{
1582 int dtype;
cf7c6148 1583 struct dirent *de = cdir->de;
16e2cfa9 1584
91a2288b
NTND
1585 if (!de)
1586 return treat_path_fast(dir, untracked, cdir, path,
e1b8c7bd 1587 baselen, pathspec);
16e2cfa9 1588 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
defd7c7b 1589 return path_none;
49dc2cc2
RS
1590 strbuf_setlen(path, baselen);
1591 strbuf_addstr(path, de->d_name);
e1b8c7bd 1592 if (simplify_away(path->buf, path->len, pathspec))
defd7c7b 1593 return path_none;
16e2cfa9
JH
1594
1595 dtype = DTYPE(de);
e1b8c7bd 1596 return treat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);
0dcb8d7f
NTND
1597}
1598
1599static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1600{
1601 if (!dir)
1602 return;
1603 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1604 dir->untracked_alloc);
1605 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1606}
1607
91a2288b
NTND
1608static int valid_cached_dir(struct dir_struct *dir,
1609 struct untracked_cache_dir *untracked,
1610 struct strbuf *path,
1611 int check_only)
1612{
1613 struct stat st;
1614
1615 if (!untracked)
1616 return 0;
1617
1618 if (stat(path->len ? path->buf : ".", &st)) {
1619 invalidate_directory(dir->untracked, untracked);
1620 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1621 return 0;
1622 }
1623 if (!untracked->valid ||
ed4efab1 1624 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {
91a2288b
NTND
1625 if (untracked->valid)
1626 invalidate_directory(dir->untracked, untracked);
1627 fill_stat_data(&untracked->stat_data, &st);
1628 return 0;
1629 }
1630
1631 if (untracked->check_only != !!check_only) {
1632 invalidate_directory(dir->untracked, untracked);
1633 return 0;
1634 }
1635
1636 /*
1637 * prep_exclude will be called eventually on this directory,
1638 * but it's called much later in last_exclude_matching(). We
1639 * need it now to determine the validity of the cache for this
1640 * path. The next calls will be nearly no-op, the way
1641 * prep_exclude() is designed.
1642 */
1643 if (path->len && path->buf[path->len - 1] != '/') {
1644 strbuf_addch(path, '/');
1645 prep_exclude(dir, path->buf, path->len);
1646 strbuf_setlen(path, path->len - 1);
1647 } else
1648 prep_exclude(dir, path->buf, path->len);
1649
1650 /* hopefully prep_exclude() haven't invalidated this entry... */
1651 return untracked->valid;
1652}
1653
cf7c6148
NTND
1654static int open_cached_dir(struct cached_dir *cdir,
1655 struct dir_struct *dir,
1656 struct untracked_cache_dir *untracked,
1657 struct strbuf *path,
1658 int check_only)
1659{
1660 memset(cdir, 0, sizeof(*cdir));
1661 cdir->untracked = untracked;
91a2288b
NTND
1662 if (valid_cached_dir(dir, untracked, path, check_only))
1663 return 0;
cf7c6148 1664 cdir->fdir = opendir(path->len ? path->buf : ".");
91a2288b
NTND
1665 if (dir->untracked)
1666 dir->untracked->dir_opened++;
cf7c6148
NTND
1667 if (!cdir->fdir)
1668 return -1;
1669 return 0;
1670}
1671
1672static int read_cached_dir(struct cached_dir *cdir)
1673{
1674 if (cdir->fdir) {
1675 cdir->de = readdir(cdir->fdir);
1676 if (!cdir->de)
1677 return -1;
1678 return 0;
1679 }
91a2288b
NTND
1680 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1681 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1682 if (!d->recurse) {
1683 cdir->nr_dirs++;
1684 continue;
1685 }
91a2288b
NTND
1686 cdir->ucd = d;
1687 cdir->nr_dirs++;
1688 return 0;
1689 }
1690 cdir->ucd = NULL;
1691 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1692 struct untracked_cache_dir *d = cdir->untracked;
1693 cdir->file = d->untracked[cdir->nr_files++];
1694 return 0;
1695 }
cf7c6148
NTND
1696 return -1;
1697}
1698
1699static void close_cached_dir(struct cached_dir *cdir)
1700{
1701 if (cdir->fdir)
1702 closedir(cdir->fdir);
91a2288b
NTND
1703 /*
1704 * We have gone through this directory and found no untracked
1705 * entries. Mark it valid.
1706 */
26cb0182 1707 if (cdir->untracked) {
91a2288b 1708 cdir->untracked->valid = 1;
26cb0182
NTND
1709 cdir->untracked->recurse = 1;
1710 }
16e2cfa9
JH
1711}
1712
453ec4bd
LT
1713/*
1714 * Read a directory tree. We currently ignore anything but
1715 * directories, regular files and symlinks. That's because git
1716 * doesn't handle them at all yet. Maybe that will change some
1717 * day.
1718 *
1719 * Also, we ignore the name ".git" (even if it is not a directory).
1720 * That likely will not change.
defd7c7b
KB
1721 *
1722 * Returns the most significant path_treatment value encountered in the scan.
453ec4bd 1723 */
defd7c7b 1724static enum path_treatment read_directory_recursive(struct dir_struct *dir,
53cc5356 1725 const char *base, int baselen,
0dcb8d7f 1726 struct untracked_cache_dir *untracked, int check_only,
e1b8c7bd 1727 const struct pathspec *pathspec)
453ec4bd 1728{
cf7c6148 1729 struct cached_dir cdir;
defd7c7b 1730 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1731 struct strbuf path = STRBUF_INIT;
453ec4bd 1732
bef36921 1733 strbuf_add(&path, base, baselen);
02cb6753 1734
cf7c6148 1735 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))
1528d247
RS
1736 goto out;
1737
0dcb8d7f
NTND
1738 if (untracked)
1739 untracked->check_only = !!check_only;
1740
cf7c6148 1741 while (!read_cached_dir(&cdir)) {
defd7c7b 1742 /* check how the file or directory should be treated */
e1b8c7bd
BW
1743 state = treat_path(dir, untracked, &cdir, &path,
1744 baselen, pathspec);
0dcb8d7f 1745
defd7c7b
KB
1746 if (state > dir_state)
1747 dir_state = state;
1748
1749 /* recurse into subdir if instructed by treat_path */
df5bcdf8
SL
1750 if ((state == path_recurse) ||
1751 ((state == path_untracked) &&
1752 (dir->flags & DIR_SHOW_IGNORED_TOO) &&
1753 (get_dtype(cdir.de, path.buf, path.len) == DT_DIR))) {
0dcb8d7f
NTND
1754 struct untracked_cache_dir *ud;
1755 ud = lookup_untracked(dir->untracked, untracked,
1756 path.buf + baselen,
1757 path.len - baselen);
1758 subdir_state =
e1b8c7bd
BW
1759 read_directory_recursive(dir, path.buf,
1760 path.len, ud,
1761 check_only, pathspec);
defd7c7b
KB
1762 if (subdir_state > dir_state)
1763 dir_state = subdir_state;
1764 }
1765
1766 if (check_only) {
1767 /* abort early if maximum state has been reached */
0dcb8d7f 1768 if (dir_state == path_untracked) {
91a2288b 1769 if (cdir.fdir)
0dcb8d7f 1770 add_untracked(untracked, path.buf + baselen);
defd7c7b 1771 break;
0dcb8d7f 1772 }
defd7c7b 1773 /* skip the dir_add_* part */
02cb6753 1774 continue;
453ec4bd 1775 }
defd7c7b
KB
1776
1777 /* add the path to the appropriate result list */
1778 switch (state) {
1779 case path_excluded:
1780 if (dir->flags & DIR_SHOW_IGNORED)
1781 dir_add_name(dir, path.buf, path.len);
0aaf62b6
KB
1782 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1783 ((dir->flags & DIR_COLLECT_IGNORED) &&
1784 exclude_matches_pathspec(path.buf, path.len,
e1b8c7bd 1785 pathspec)))
0aaf62b6 1786 dir_add_ignored(dir, path.buf, path.len);
defd7c7b
KB
1787 break;
1788
1789 case path_untracked:
0dcb8d7f
NTND
1790 if (dir->flags & DIR_SHOW_IGNORED)
1791 break;
1792 dir_add_name(dir, path.buf, path.len);
91a2288b 1793 if (cdir.fdir)
0dcb8d7f 1794 add_untracked(untracked, path.buf + baselen);
1528d247 1795 break;
defd7c7b
KB
1796
1797 default:
1798 break;
1799 }
453ec4bd 1800 }
cf7c6148 1801 close_cached_dir(&cdir);
1528d247 1802 out:
bef36921 1803 strbuf_release(&path);
453ec4bd 1804
defd7c7b 1805 return dir_state;
453ec4bd
LT
1806}
1807
1808static int cmp_name(const void *p1, const void *p2)
1809{
1810 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1811 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1812
ccdd4a0f 1813 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
1814}
1815
fb898888
SL
1816/* check if *out lexically strictly contains *in */
1817static int check_contains(const struct dir_entry *out, const struct dir_entry *in)
1818{
1819 return (out->len < in->len) &&
1820 (out->name[out->len - 1] == '/') &&
1821 !memcmp(out->name, in->name, out->len);
1822}
1823
48ffef96
JH
1824static int treat_leading_path(struct dir_struct *dir,
1825 const char *path, int len,
e1b8c7bd 1826 const struct pathspec *pathspec)
48ffef96 1827{
49dc2cc2
RS
1828 struct strbuf sb = STRBUF_INIT;
1829 int baselen, rc = 0;
48ffef96 1830 const char *cp;
be8a84c5 1831 int old_flags = dir->flags;
48ffef96
JH
1832
1833 while (len && path[len - 1] == '/')
1834 len--;
1835 if (!len)
1836 return 1;
1837 baselen = 0;
be8a84c5 1838 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
1839 while (1) {
1840 cp = path + baselen + !!baselen;
1841 cp = memchr(cp, '/', path + len - cp);
1842 if (!cp)
1843 baselen = len;
1844 else
1845 baselen = cp - path;
49dc2cc2
RS
1846 strbuf_setlen(&sb, 0);
1847 strbuf_add(&sb, path, baselen);
1848 if (!is_directory(sb.buf))
1849 break;
e1b8c7bd 1850 if (simplify_away(sb.buf, sb.len, pathspec))
49dc2cc2 1851 break;
e1b8c7bd 1852 if (treat_one_path(dir, NULL, &sb, baselen, pathspec,
defd7c7b 1853 DT_DIR, NULL) == path_none)
49dc2cc2
RS
1854 break; /* do not recurse into it */
1855 if (len <= baselen) {
1856 rc = 1;
1857 break; /* finished checking */
1858 }
48ffef96 1859 }
49dc2cc2 1860 strbuf_release(&sb);
be8a84c5 1861 dir->flags = old_flags;
49dc2cc2 1862 return rc;
48ffef96
JH
1863}
1864
1e8fef60
NTND
1865static const char *get_ident_string(void)
1866{
1867 static struct strbuf sb = STRBUF_INIT;
1868 struct utsname uts;
1869
1870 if (sb.len)
1871 return sb.buf;
100e4337 1872 if (uname(&uts) < 0)
1e8fef60 1873 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
1874 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
1875 uts.sysname);
1e8fef60
NTND
1876 return sb.buf;
1877}
1878
1879static int ident_in_untracked(const struct untracked_cache *uc)
1880{
0e0f7618
CC
1881 /*
1882 * Previous git versions may have saved many NUL separated
1883 * strings in the "ident" field, but it is insane to manage
1884 * many locations, so just take care of the first one.
1885 */
1e8fef60 1886
0e0f7618 1887 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
1888}
1889
0e0f7618 1890static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 1891{
0e0f7618 1892 strbuf_reset(&uc->ident);
1e8fef60 1893 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
1894
1895 /*
1896 * This strbuf used to contain a list of NUL separated
1897 * strings, so save NUL too for backward compatibility.
1898 */
1e8fef60
NTND
1899 strbuf_addch(&uc->ident, 0);
1900}
1901
4a4ca479
CC
1902static void new_untracked_cache(struct index_state *istate)
1903{
1904 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
1905 strbuf_init(&uc->ident, 100);
1906 uc->exclude_per_dir = ".gitignore";
1907 /* should be the same flags used by git-status */
1908 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 1909 set_untracked_ident(uc);
4a4ca479 1910 istate->untracked = uc;
0e0f7618 1911 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
1912}
1913
1914void add_untracked_cache(struct index_state *istate)
1915{
1916 if (!istate->untracked) {
1917 new_untracked_cache(istate);
0e0f7618
CC
1918 } else {
1919 if (!ident_in_untracked(istate->untracked)) {
1920 free_untracked_cache(istate->untracked);
1921 new_untracked_cache(istate);
1922 }
1923 }
4a4ca479
CC
1924}
1925
07b29bfd
CC
1926void remove_untracked_cache(struct index_state *istate)
1927{
1928 if (istate->untracked) {
1929 free_untracked_cache(istate->untracked);
1930 istate->untracked = NULL;
1931 istate->cache_changed |= UNTRACKED_CHANGED;
1932 }
1933}
1934
ccad261f
NTND
1935static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
1936 int base_len,
1937 const struct pathspec *pathspec)
1938{
1939 struct untracked_cache_dir *root;
1940
76e6b090 1941 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
ccad261f
NTND
1942 return NULL;
1943
1944 /*
1945 * We only support $GIT_DIR/info/exclude and core.excludesfile
1946 * as the global ignore rule files. Any other additions
1947 * (e.g. from command line) invalidate the cache. This
1948 * condition also catches running setup_standard_excludes()
1949 * before setting dir->untracked!
1950 */
1951 if (dir->unmanaged_exclude_files)
1952 return NULL;
1953
1954 /*
1955 * Optimize for the main use case only: whole-tree git
1956 * status. More work involved in treat_leading_path() if we
1957 * use cache on just a subset of the worktree. pathspec
1958 * support could make the matter even worse.
1959 */
1960 if (base_len || (pathspec && pathspec->nr))
1961 return NULL;
1962
1963 /* Different set of flags may produce different results */
1964 if (dir->flags != dir->untracked->dir_flags ||
1965 /*
1966 * See treat_directory(), case index_nonexistent. Without
1967 * this flag, we may need to also cache .git file content
1968 * for the resolve_gitlink_ref() call, which we don't.
1969 */
1970 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
1971 /* We don't support collecting ignore files */
1972 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
1973 DIR_COLLECT_IGNORED)))
1974 return NULL;
1975
1976 /*
1977 * If we use .gitignore in the cache and now you change it to
1978 * .gitexclude, everything will go wrong.
1979 */
1980 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
1981 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
1982 return NULL;
1983
1984 /*
1985 * EXC_CMDL is not considered in the cache. If people set it,
1986 * skip the cache.
1987 */
1988 if (dir->exclude_list_group[EXC_CMDL].nr)
1989 return NULL;
1990
1e8fef60 1991 if (!ident_in_untracked(dir->untracked)) {
0e0f7618 1992 warning(_("Untracked cache is disabled on this system or location."));
1e8fef60
NTND
1993 return NULL;
1994 }
1995
ccad261f
NTND
1996 if (!dir->untracked->root) {
1997 const int len = sizeof(*dir->untracked->root);
1998 dir->untracked->root = xmalloc(len);
1999 memset(dir->untracked->root, 0, len);
2000 }
2001
2002 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
2003 root = dir->untracked->root;
2004 if (hashcmp(dir->ss_info_exclude.sha1,
2005 dir->untracked->ss_info_exclude.sha1)) {
2006 invalidate_gitignore(dir->untracked, root);
2007 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
2008 }
2009 if (hashcmp(dir->ss_excludes_file.sha1,
2010 dir->untracked->ss_excludes_file.sha1)) {
2011 invalidate_gitignore(dir->untracked, root);
2012 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
2013 }
26cb0182
NTND
2014
2015 /* Make sure this directory is not dropped out at saving phase */
2016 root->recurse = 1;
ccad261f
NTND
2017 return root;
2018}
2019
e1b8c7bd
BW
2020int read_directory(struct dir_struct *dir, const char *path,
2021 int len, const struct pathspec *pathspec)
9fc42d60 2022{
ccad261f 2023 struct untracked_cache_dir *untracked;
b4189aa8 2024
dba2e203 2025 if (has_symlink_leading_path(path, len))
725b0605
JH
2026 return dir->nr;
2027
ccad261f
NTND
2028 untracked = validate_untracked_cache(dir, len, pathspec);
2029 if (!untracked)
2030 /*
2031 * make sure untracked cache code path is disabled,
2032 * e.g. prep_exclude()
2033 */
2034 dir->untracked = NULL;
e1b8c7bd
BW
2035 if (!len || treat_leading_path(dir, path, len, pathspec))
2036 read_directory_recursive(dir, path, len, untracked, 0, pathspec);
9ed0d8d6
RS
2037 QSORT(dir->entries, dir->nr, cmp_name);
2038 QSORT(dir->ignored, dir->ignored_nr, cmp_name);
fb898888
SL
2039
2040 /*
2041 * If DIR_SHOW_IGNORED_TOO is set, read_directory_recursive() will
2042 * also pick up untracked contents of untracked dirs; by default
2043 * we discard these, but given DIR_KEEP_UNTRACKED_CONTENTS we do not.
2044 */
2045 if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&
2046 !(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) {
2047 int i, j;
2048
2049 /* remove from dir->entries untracked contents of untracked dirs */
2050 for (i = j = 0; j < dir->nr; j++) {
2051 if (i && check_contains(dir->entries[i - 1], dir->entries[j])) {
2052 free(dir->entries[j]);
2053 dir->entries[j] = NULL;
2054 } else {
2055 dir->entries[i++] = dir->entries[j];
2056 }
2057 }
2058
2059 dir->nr = i;
2060 }
2061
c9ccb5d3
NTND
2062 if (dir->untracked) {
2063 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2064 trace_printf_key(&trace_untracked_stats,
2065 "node creation: %u\n"
2066 "gitignore invalidation: %u\n"
2067 "directory invalidation: %u\n"
2068 "opendir: %u\n",
2069 dir->untracked->dir_created,
2070 dir->untracked->gitignore_invalidated,
2071 dir->untracked->dir_invalidated,
2072 dir->untracked->dir_opened);
1bbb3dba
NTND
2073 if (dir->untracked == the_index.untracked &&
2074 (dir->untracked->dir_opened ||
2075 dir->untracked->gitignore_invalidated ||
2076 dir->untracked->dir_invalidated))
2077 the_index.cache_changed |= UNTRACKED_CHANGED;
2078 if (dir->untracked != the_index.untracked) {
2079 free(dir->untracked);
2080 dir->untracked = NULL;
2081 }
c9ccb5d3 2082 }
453ec4bd
LT
2083 return dir->nr;
2084}
c91f0d92 2085
686a4a06 2086int file_exists(const char *f)
c91f0d92 2087{
686a4a06 2088 struct stat sb;
a50f9fc5 2089 return lstat(f, &sb) == 0;
c91f0d92 2090}
e6636747 2091
63ec5e1f
JS
2092static int cmp_icase(char a, char b)
2093{
2094 if (a == b)
2095 return 0;
2096 if (ignore_case)
2097 return toupper(a) - toupper(b);
2098 return a - b;
2099}
2100
e6636747 2101/*
9b125da4
NTND
2102 * Given two normalized paths (a trailing slash is ok), if subdir is
2103 * outside dir, return -1. Otherwise return the offset in subdir that
2104 * can be used as relative path to dir.
e6636747 2105 */
9b125da4 2106int dir_inside_of(const char *subdir, const char *dir)
e6636747 2107{
9b125da4 2108 int offset = 0;
e6636747 2109
9b125da4 2110 assert(dir && subdir && *dir && *subdir);
e6636747 2111
63ec5e1f 2112 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2113 dir++;
9b125da4
NTND
2114 subdir++;
2115 offset++;
490544b1 2116 }
9b125da4
NTND
2117
2118 /* hel[p]/me vs hel[l]/yeah */
2119 if (*dir && *subdir)
2120 return -1;
2121
2122 if (!*subdir)
2123 return !*dir ? offset : -1; /* same dir */
2124
2125 /* foo/[b]ar vs foo/[] */
2126 if (is_dir_sep(dir[-1]))
2127 return is_dir_sep(subdir[-1]) ? offset : -1;
2128
2129 /* foo[/]bar vs foo[] */
2130 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2131}
2132
2133int is_inside_dir(const char *dir)
2134{
56b9f6e7
RS
2135 char *cwd;
2136 int rc;
2137
b892913d
NTND
2138 if (!dir)
2139 return 0;
56b9f6e7
RS
2140
2141 cwd = xgetcwd();
2142 rc = (dir_inside_of(cwd, dir) >= 0);
2143 free(cwd);
2144 return rc;
e6636747 2145}
7155b727 2146
55892d23
AP
2147int is_empty_dir(const char *path)
2148{
2149 DIR *dir = opendir(path);
2150 struct dirent *e;
2151 int ret = 1;
2152
2153 if (!dir)
2154 return 0;
2155
2156 while ((e = readdir(dir)) != NULL)
2157 if (!is_dot_or_dotdot(e->d_name)) {
2158 ret = 0;
2159 break;
2160 }
2161
2162 closedir(dir);
2163 return ret;
2164}
2165
ae2f203e 2166static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2167{
a0f4afbe 2168 DIR *dir;
7155b727 2169 struct dirent *e;
ae2f203e 2170 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2171 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2172 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
a0f4afbe 2173 unsigned char submodule_head[20];
7155b727 2174
a0f4afbe 2175 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
ae2f203e 2176 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
a0f4afbe 2177 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2178 if (kept_up)
2179 *kept_up = 1;
a0f4afbe 2180 return 0;
ae2f203e 2181 }
a0f4afbe 2182
ae2f203e 2183 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2184 dir = opendir(path->buf);
c844a803 2185 if (!dir) {
863808cd
MH
2186 if (errno == ENOENT)
2187 return keep_toplevel ? -1 : 0;
2188 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2189 /*
2190 * An empty dir could be removable even if it
2191 * is unreadable:
2192 */
c844a803
JH
2193 return rmdir(path->buf);
2194 else
2195 return -1;
2196 }
00b6c178 2197 strbuf_complete(path, '/');
7155b727
JS
2198
2199 len = path->len;
2200 while ((e = readdir(dir)) != NULL) {
2201 struct stat st;
8ca12c0d
AP
2202 if (is_dot_or_dotdot(e->d_name))
2203 continue;
7155b727
JS
2204
2205 strbuf_setlen(path, len);
2206 strbuf_addstr(path, e->d_name);
863808cd
MH
2207 if (lstat(path->buf, &st)) {
2208 if (errno == ENOENT)
2209 /*
2210 * file disappeared, which is what we
2211 * wanted anyway
2212 */
2213 continue;
2214 /* fall thru */
2215 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2216 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2217 continue; /* happy */
863808cd
MH
2218 } else if (!only_empty &&
2219 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2220 continue; /* happy, too */
863808cd 2221 }
7155b727
JS
2222
2223 /* path too long, stat fails, or non-directory still exists */
2224 ret = -1;
2225 break;
2226 }
2227 closedir(dir);
2228
2229 strbuf_setlen(path, original_len);
ae2f203e 2230 if (!ret && !keep_toplevel && !kept_down)
863808cd 2231 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2232 else if (kept_up)
2233 /*
2234 * report the uplevel that it is not an error that we
2235 * did not rmdir() our directory.
2236 */
2237 *kept_up = !ret;
7155b727
JS
2238 return ret;
2239}
039bc64e 2240
ae2f203e
JH
2241int remove_dir_recursively(struct strbuf *path, int flag)
2242{
2243 return remove_dir_recurse(path, flag, NULL);
2244}
2245
f932729c
JK
2246static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2247
039bc64e
JH
2248void setup_standard_excludes(struct dir_struct *dir)
2249{
039bc64e 2250 dir->exclude_per_dir = ".gitignore";
099d2d86
JH
2251
2252 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2845ce7f
PT
2253 if (!excludes_file)
2254 excludes_file = xdg_config_home("ignore");
4698c8fe 2255 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2256 add_excludes_from_file_1(dir, excludes_file,
2257 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2258
2259 /* per repository user preference */
f0056f64
JK
2260 if (startup_info->have_repository) {
2261 const char *path = git_path_info_exclude();
2262 if (!access_or_warn(path, R_OK, 0))
2263 add_excludes_from_file_1(dir, path,
2264 dir->untracked ? &dir->ss_info_exclude : NULL);
2265 }
039bc64e 2266}
4a92d1bf
AR
2267
2268int remove_path(const char *name)
2269{
2270 char *slash;
2271
9a6728d4 2272 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)
4a92d1bf
AR
2273 return -1;
2274
2275 slash = strrchr(name, '/');
2276 if (slash) {
2277 char *dirs = xstrdup(name);
2278 slash = dirs + (slash - name);
2279 do {
2280 *slash = '\0';
3fc0d131 2281 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2282 free(dirs);
2283 }
2284 return 0;
2285}
2286
270be816
AS
2287/*
2288 * Frees memory within dir which was allocated for exclude lists and
2289 * the exclude_stack. Does not free dir itself.
2290 */
2291void clear_directory(struct dir_struct *dir)
2292{
2293 int i, j;
2294 struct exclude_list_group *group;
2295 struct exclude_list *el;
2296 struct exclude_stack *stk;
2297
2298 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2299 group = &dir->exclude_list_group[i];
2300 for (j = 0; j < group->nr; j++) {
2301 el = &group->el[j];
2302 if (i == EXC_DIRS)
2303 free((char *)el->src);
2304 clear_exclude_list(el);
2305 }
2306 free(group->el);
2307 }
2308
2309 stk = dir->exclude_stack;
2310 while (stk) {
2311 struct exclude_stack *prev = stk->prev;
2312 free(stk);
2313 stk = prev;
2314 }
aceb9429 2315 strbuf_release(&dir->basebuf);
270be816 2316}
83c094ad
NTND
2317
2318struct ondisk_untracked_cache {
2319 struct stat_data info_exclude_stat;
2320 struct stat_data excludes_file_stat;
2321 uint32_t dir_flags;
2322 unsigned char info_exclude_sha1[20];
2323 unsigned char excludes_file_sha1[20];
2324 char exclude_per_dir[FLEX_ARRAY];
2325};
2326
2327#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)
2328
2329struct write_data {
2330 int index; /* number of written untracked_cache_dir */
2331 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2332 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2333 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2334 struct strbuf out;
2335 struct strbuf sb_stat;
2336 struct strbuf sb_sha1;
2337};
2338
2339static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2340{
2341 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2342 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2343 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2344 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2345 to->sd_dev = htonl(from->sd_dev);
2346 to->sd_ino = htonl(from->sd_ino);
2347 to->sd_uid = htonl(from->sd_uid);
2348 to->sd_gid = htonl(from->sd_gid);
2349 to->sd_size = htonl(from->sd_size);
2350}
2351
2352static void write_one_dir(struct untracked_cache_dir *untracked,
2353 struct write_data *wd)
2354{
2355 struct stat_data stat_data;
2356 struct strbuf *out = &wd->out;
2357 unsigned char intbuf[16];
2358 unsigned int intlen, value;
2359 int i = wd->index++;
2360
2361 /*
2362 * untracked_nr should be reset whenever valid is clear, but
2363 * for safety..
2364 */
2365 if (!untracked->valid) {
2366 untracked->untracked_nr = 0;
2367 untracked->check_only = 0;
2368 }
2369
2370 if (untracked->check_only)
2371 ewah_set(wd->check_only, i);
2372 if (untracked->valid) {
2373 ewah_set(wd->valid, i);
2374 stat_data_to_disk(&stat_data, &untracked->stat_data);
2375 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2376 }
2377 if (!is_null_sha1(untracked->exclude_sha1)) {
2378 ewah_set(wd->sha1_valid, i);
2379 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2380 }
2381
2382 intlen = encode_varint(untracked->untracked_nr, intbuf);
2383 strbuf_add(out, intbuf, intlen);
2384
2385 /* skip non-recurse directories */
2386 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2387 if (untracked->dirs[i]->recurse)
2388 value++;
2389 intlen = encode_varint(value, intbuf);
2390 strbuf_add(out, intbuf, intlen);
2391
2392 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2393
2394 for (i = 0; i < untracked->untracked_nr; i++)
2395 strbuf_add(out, untracked->untracked[i],
2396 strlen(untracked->untracked[i]) + 1);
2397
2398 for (i = 0; i < untracked->dirs_nr; i++)
2399 if (untracked->dirs[i]->recurse)
2400 write_one_dir(untracked->dirs[i], wd);
2401}
2402
2403void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2404{
2405 struct ondisk_untracked_cache *ouc;
2406 struct write_data wd;
2407 unsigned char varbuf[16];
e0b83735
JK
2408 int varint_len;
2409 size_t len = strlen(untracked->exclude_per_dir);
2410
2411 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
83c094ad
NTND
2412 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2413 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2414 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2415 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2416 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2417
2418 varint_len = encode_varint(untracked->ident.len, varbuf);
2419 strbuf_add(out, varbuf, varint_len);
8109984d 2420 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2421
83c094ad
NTND
2422 strbuf_add(out, ouc, ouc_size(len));
2423 free(ouc);
2424 ouc = NULL;
2425
2426 if (!untracked->root) {
2427 varint_len = encode_varint(0, varbuf);
2428 strbuf_add(out, varbuf, varint_len);
2429 return;
2430 }
2431
2432 wd.index = 0;
2433 wd.check_only = ewah_new();
2434 wd.valid = ewah_new();
2435 wd.sha1_valid = ewah_new();
2436 strbuf_init(&wd.out, 1024);
2437 strbuf_init(&wd.sb_stat, 1024);
2438 strbuf_init(&wd.sb_sha1, 1024);
2439 write_one_dir(untracked->root, &wd);
2440
2441 varint_len = encode_varint(wd.index, varbuf);
2442 strbuf_add(out, varbuf, varint_len);
2443 strbuf_addbuf(out, &wd.out);
2444 ewah_serialize_strbuf(wd.valid, out);
2445 ewah_serialize_strbuf(wd.check_only, out);
2446 ewah_serialize_strbuf(wd.sha1_valid, out);
2447 strbuf_addbuf(out, &wd.sb_stat);
2448 strbuf_addbuf(out, &wd.sb_sha1);
2449 strbuf_addch(out, '\0'); /* safe guard for string lists */
2450
2451 ewah_free(wd.valid);
2452 ewah_free(wd.check_only);
2453 ewah_free(wd.sha1_valid);
2454 strbuf_release(&wd.out);
2455 strbuf_release(&wd.sb_stat);
2456 strbuf_release(&wd.sb_sha1);
2457}
f9e6c649
NTND
2458
2459static void free_untracked(struct untracked_cache_dir *ucd)
2460{
2461 int i;
2462 if (!ucd)
2463 return;
2464 for (i = 0; i < ucd->dirs_nr; i++)
2465 free_untracked(ucd->dirs[i]);
2466 for (i = 0; i < ucd->untracked_nr; i++)
2467 free(ucd->untracked[i]);
2468 free(ucd->untracked);
2469 free(ucd->dirs);
2470 free(ucd);
2471}
2472
2473void free_untracked_cache(struct untracked_cache *uc)
2474{
2475 if (uc)
2476 free_untracked(uc->root);
2477 free(uc);
2478}
2479
2480struct read_data {
2481 int index;
2482 struct untracked_cache_dir **ucd;
2483 struct ewah_bitmap *check_only;
2484 struct ewah_bitmap *valid;
2485 struct ewah_bitmap *sha1_valid;
2486 const unsigned char *data;
2487 const unsigned char *end;
2488};
2489
2490static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
2491{
2492 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
2493 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
2494 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
2495 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
2496 to->sd_dev = get_be32(&from->sd_dev);
2497 to->sd_ino = get_be32(&from->sd_ino);
2498 to->sd_uid = get_be32(&from->sd_uid);
2499 to->sd_gid = get_be32(&from->sd_gid);
2500 to->sd_size = get_be32(&from->sd_size);
2501}
2502
2503static int read_one_dir(struct untracked_cache_dir **untracked_,
2504 struct read_data *rd)
2505{
2506 struct untracked_cache_dir ud, *untracked;
2507 const unsigned char *next, *data = rd->data, *end = rd->end;
2508 unsigned int value;
2509 int i, len;
2510
2511 memset(&ud, 0, sizeof(ud));
2512
2513 next = data;
2514 value = decode_varint(&next);
2515 if (next > end)
2516 return -1;
2517 ud.recurse = 1;
2518 ud.untracked_alloc = value;
2519 ud.untracked_nr = value;
2520 if (ud.untracked_nr)
b32fa95f 2521 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649
NTND
2522 data = next;
2523
2524 next = data;
2525 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2526 if (next > end)
2527 return -1;
b32fa95f 2528 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649
NTND
2529 data = next;
2530
2531 len = strlen((const char *)data);
2532 next = data + len + 1;
2533 if (next > rd->end)
2534 return -1;
50a6c8ef 2535 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));
f9e6c649
NTND
2536 memcpy(untracked, &ud, sizeof(ud));
2537 memcpy(untracked->name, data, len + 1);
2538 data = next;
2539
2540 for (i = 0; i < untracked->untracked_nr; i++) {
2541 len = strlen((const char *)data);
2542 next = data + len + 1;
2543 if (next > rd->end)
2544 return -1;
2545 untracked->untracked[i] = xstrdup((const char*)data);
2546 data = next;
2547 }
2548
2549 rd->ucd[rd->index++] = untracked;
2550 rd->data = data;
2551
2552 for (i = 0; i < untracked->dirs_nr; i++) {
2553 len = read_one_dir(untracked->dirs + i, rd);
2554 if (len < 0)
2555 return -1;
2556 }
2557 return 0;
2558}
2559
2560static void set_check_only(size_t pos, void *cb)
2561{
2562 struct read_data *rd = cb;
2563 struct untracked_cache_dir *ud = rd->ucd[pos];
2564 ud->check_only = 1;
2565}
2566
2567static void read_stat(size_t pos, void *cb)
2568{
2569 struct read_data *rd = cb;
2570 struct untracked_cache_dir *ud = rd->ucd[pos];
2571 if (rd->data + sizeof(struct stat_data) > rd->end) {
2572 rd->data = rd->end + 1;
2573 return;
2574 }
2575 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
2576 rd->data += sizeof(struct stat_data);
2577 ud->valid = 1;
2578}
2579
2580static void read_sha1(size_t pos, void *cb)
2581{
2582 struct read_data *rd = cb;
2583 struct untracked_cache_dir *ud = rd->ucd[pos];
2584 if (rd->data + 20 > rd->end) {
2585 rd->data = rd->end + 1;
2586 return;
2587 }
2588 hashcpy(ud->exclude_sha1, rd->data);
2589 rd->data += 20;
2590}
2591
2592static void load_sha1_stat(struct sha1_stat *sha1_stat,
2593 const struct stat_data *stat,
2594 const unsigned char *sha1)
2595{
2596 stat_data_from_disk(&sha1_stat->stat, stat);
2597 hashcpy(sha1_stat->sha1, sha1);
2598 sha1_stat->valid = 1;
2599}
2600
2601struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2602{
2603 const struct ondisk_untracked_cache *ouc;
2604 struct untracked_cache *uc;
2605 struct read_data rd;
2606 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60
NTND
2607 const char *ident;
2608 int ident_len, len;
f9e6c649
NTND
2609
2610 if (sz <= 1 || end[-1] != '\0')
2611 return NULL;
2612 end--;
2613
1e8fef60
NTND
2614 ident_len = decode_varint(&next);
2615 if (next + ident_len > end)
2616 return NULL;
2617 ident = (const char *)next;
2618 next += ident_len;
2619
f9e6c649
NTND
2620 ouc = (const struct ondisk_untracked_cache *)next;
2621 if (next + ouc_size(0) > end)
2622 return NULL;
2623
2624 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2625 strbuf_init(&uc->ident, ident_len);
2626 strbuf_add(&uc->ident, ident, ident_len);
f9e6c649
NTND
2627 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
2628 ouc->info_exclude_sha1);
2629 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
2630 ouc->excludes_file_sha1);
2631 uc->dir_flags = get_be32(&ouc->dir_flags);
2632 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
2633 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
2634 next += ouc_size(strlen(ouc->exclude_per_dir));
2635 if (next >= end)
2636 goto done2;
2637
2638 len = decode_varint(&next);
2639 if (next > end || len == 0)
2640 goto done2;
2641
2642 rd.valid = ewah_new();
2643 rd.check_only = ewah_new();
2644 rd.sha1_valid = ewah_new();
2645 rd.data = next;
2646 rd.end = end;
2647 rd.index = 0;
b32fa95f 2648 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2649
2650 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2651 goto done;
2652
2653 next = rd.data;
2654 len = ewah_read_mmap(rd.valid, next, end - next);
2655 if (len < 0)
2656 goto done;
2657
2658 next += len;
2659 len = ewah_read_mmap(rd.check_only, next, end - next);
2660 if (len < 0)
2661 goto done;
2662
2663 next += len;
2664 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2665 if (len < 0)
2666 goto done;
2667
2668 ewah_each_bit(rd.check_only, set_check_only, &rd);
2669 rd.data = next + len;
2670 ewah_each_bit(rd.valid, read_stat, &rd);
2671 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2672 next = rd.data;
2673
2674done:
2675 free(rd.ucd);
2676 ewah_free(rd.valid);
2677 ewah_free(rd.check_only);
2678 ewah_free(rd.sha1_valid);
2679done2:
2680 if (next != end) {
2681 free_untracked_cache(uc);
2682 uc = NULL;
2683 }
2684 return uc;
2685}
e931371a 2686
73f9145f
NTND
2687static void invalidate_one_directory(struct untracked_cache *uc,
2688 struct untracked_cache_dir *ucd)
2689{
2690 uc->dir_invalidated++;
2691 ucd->valid = 0;
2692 ucd->untracked_nr = 0;
2693}
2694
2695/*
2696 * Normally when an entry is added or removed from a directory,
2697 * invalidating that directory is enough. No need to touch its
2698 * ancestors. When a directory is shown as "foo/bar/" in git-status
2699 * however, deleting or adding an entry may have cascading effect.
2700 *
2701 * Say the "foo/bar/file" has become untracked, we need to tell the
2702 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2703 * directory any more (because "bar" is managed by foo as an untracked
2704 * "file").
2705 *
2706 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2707 * was the last untracked entry in the entire "foo", we should show
2708 * "foo/" instead. Which means we have to invalidate past "bar" up to
2709 * "foo".
2710 *
2711 * This function traverses all directories from root to leaf. If there
2712 * is a chance of one of the above cases happening, we invalidate back
2713 * to root. Otherwise we just invalidate the leaf. There may be a more
2714 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2715 * detect these cases and avoid unnecessary invalidation, for example,
2716 * checking for the untracked entry named "bar/" in "foo", but for now
2717 * stick to something safe and simple.
2718 */
2719static int invalidate_one_component(struct untracked_cache *uc,
2720 struct untracked_cache_dir *dir,
2721 const char *path, int len)
2722{
2723 const char *rest = strchr(path, '/');
2724
2725 if (rest) {
2726 int component_len = rest - path;
2727 struct untracked_cache_dir *d =
2728 lookup_untracked(uc, dir, path, component_len);
2729 int ret =
2730 invalidate_one_component(uc, d, rest + 1,
2731 len - (component_len + 1));
2732 if (ret)
2733 invalidate_one_directory(uc, dir);
2734 return ret;
2735 }
2736
2737 invalidate_one_directory(uc, dir);
2738 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2739}
2740
e931371a
NTND
2741void untracked_cache_invalidate_path(struct index_state *istate,
2742 const char *path)
2743{
e931371a
NTND
2744 if (!istate->untracked || !istate->untracked->root)
2745 return;
73f9145f
NTND
2746 invalidate_one_component(istate->untracked, istate->untracked->root,
2747 path, strlen(path));
e931371a
NTND
2748}
2749
2750void untracked_cache_remove_from_index(struct index_state *istate,
2751 const char *path)
2752{
2753 untracked_cache_invalidate_path(istate, path);
2754}
2755
2756void untracked_cache_add_to_index(struct index_state *istate,
2757 const char *path)
2758{
2759 untracked_cache_invalidate_path(istate, path);
2760}
47e83eb3
SB
2761
2762/* Update gitfile and core.worktree setting to connect work tree and git dir */
2763void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
2764{
2765 struct strbuf file_name = STRBUF_INIT;
2766 struct strbuf rel_path = STRBUF_INIT;
ce83eadd
JS
2767 char *git_dir = real_pathdup(git_dir_, 1);
2768 char *work_tree = real_pathdup(work_tree_, 1);
47e83eb3
SB
2769
2770 /* Update gitfile */
2771 strbuf_addf(&file_name, "%s/.git", work_tree);
2772 write_file(file_name.buf, "gitdir: %s",
2773 relative_path(git_dir, work_tree, &rel_path));
2774
2775 /* Update core.worktree setting */
2776 strbuf_reset(&file_name);
2777 strbuf_addf(&file_name, "%s/config", git_dir);
2778 git_config_set_in_file(file_name.buf, "core.worktree",
2779 relative_path(work_tree, git_dir, &rel_path));
2780
2781 strbuf_release(&file_name);
2782 strbuf_release(&rel_path);
2783 free(work_tree);
2784 free(git_dir);
2785}
f6f85861
SB
2786
2787/*
2788 * Migrate the git directory of the given path from old_git_dir to new_git_dir.
2789 */
2790void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
2791{
2792 if (rename(old_git_dir, new_git_dir) < 0)
2793 die_errno(_("could not migrate git directory from '%s' to '%s'"),
2794 old_git_dir, new_git_dir);
2795
2796 connect_work_tree_and_git_dir(path, new_git_dir);
2797}