ls-files: pass through safe options for --recurse-submodules
[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
9fc42d60
LT
19struct path_simplify {
20 int len;
21 const char *path;
22};
23
defd7c7b
KB
24/*
25 * Tells read_directory_recursive how a file or directory should be treated.
26 * Values are ordered by significance, e.g. if a directory contains both
27 * excluded and untracked files, it is listed as untracked because
28 * path_untracked > path_excluded.
29 */
30enum path_treatment {
31 path_none = 0,
32 path_recurse,
33 path_excluded,
34 path_untracked
35};
36
cf7c6148
NTND
37/*
38 * Support data structure for our opendir/readdir/closedir wrappers
39 */
40struct cached_dir {
41 DIR *fdir;
42 struct untracked_cache_dir *untracked;
91a2288b
NTND
43 int nr_files;
44 int nr_dirs;
45
cf7c6148 46 struct dirent *de;
91a2288b
NTND
47 const char *file;
48 struct untracked_cache_dir *ucd;
cf7c6148
NTND
49};
50
defd7c7b 51static enum path_treatment read_directory_recursive(struct dir_struct *dir,
0dcb8d7f 52 const char *path, int len, struct untracked_cache_dir *untracked,
09595258 53 int check_only, const struct path_simplify *simplify);
caa6b782 54static int get_dtype(struct dirent *de, const char *path, int len);
09595258 55
ba0897e6 56int fspathcmp(const char *a, const char *b)
8cf2a84e
JJ
57{
58 return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
59}
60
ba0897e6 61int fspathncmp(const char *a, const char *b, size_t count)
8cf2a84e
JJ
62{
63 return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
64}
65
1f26ce61
CB
66int git_fnmatch(const struct pathspec_item *item,
67 const char *pattern, const char *string,
68 int prefix)
5d74762d 69{
5d74762d 70 if (prefix > 0) {
93d93537 71 if (ps_strncmp(item, pattern, string, prefix))
eb07894f 72 return WM_NOMATCH;
5d74762d
NTND
73 pattern += prefix;
74 string += prefix;
75 }
bd30c2e4 76 if (item->flags & PATHSPEC_ONESTAR) {
8c6abbcd
NTND
77 int pattern_len = strlen(++pattern);
78 int string_len = strlen(string);
79 return string_len < pattern_len ||
93d93537
NTND
80 ps_strcmp(item, pattern,
81 string + string_len - pattern_len);
8c6abbcd 82 }
bd30c2e4 83 if (item->magic & PATHSPEC_GLOB)
93d93537
NTND
84 return wildmatch(pattern, string,
85 WM_PATHNAME |
86 (item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0),
87 NULL);
bd30c2e4
NTND
88 else
89 /* wildmatch has not learned no FNM_PATHNAME mode yet */
eb07894f
NTND
90 return wildmatch(pattern, string,
91 item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
92 NULL);
5d74762d
NTND
93}
94
0b6e56df
JH
95static int fnmatch_icase_mem(const char *pattern, int patternlen,
96 const char *string, int stringlen,
97 int flags)
98{
99 int match_status;
100 struct strbuf pat_buf = STRBUF_INIT;
101 struct strbuf str_buf = STRBUF_INIT;
102 const char *use_pat = pattern;
103 const char *use_str = string;
104
105 if (pattern[patternlen]) {
106 strbuf_add(&pat_buf, pattern, patternlen);
107 use_pat = pat_buf.buf;
108 }
109 if (string[stringlen]) {
110 strbuf_add(&str_buf, string, stringlen);
111 use_str = str_buf.buf;
112 }
113
f30366b2
JH
114 if (ignore_case)
115 flags |= WM_CASEFOLD;
116 match_status = wildmatch(use_pat, use_str, flags, NULL);
0b6e56df
JH
117
118 strbuf_release(&pat_buf);
119 strbuf_release(&str_buf);
120
121 return match_status;
122}
123
827f4d6c 124static size_t common_prefix_len(const struct pathspec *pathspec)
3c6a370b 125{
827f4d6c 126 int n;
4a085b16 127 size_t max = 0;
3c6a370b 128
93d93537
NTND
129 /*
130 * ":(icase)path" is treated as a pathspec full of
131 * wildcard. In other words, only prefix is considered common
132 * prefix. If the pathspec is abc/foo abc/bar, running in
133 * subdir xyz, the common prefix is still xyz, not xuz/abc as
134 * in non-:(icase).
135 */
5c6933d2
NTND
136 GUARD_PATHSPEC(pathspec,
137 PATHSPEC_FROMTOP |
138 PATHSPEC_MAXDEPTH |
bd30c2e4 139 PATHSPEC_LITERAL |
93d93537 140 PATHSPEC_GLOB |
ef79b1f8
NTND
141 PATHSPEC_ICASE |
142 PATHSPEC_EXCLUDE);
4a085b16 143
827f4d6c 144 for (n = 0; n < pathspec->nr; n++) {
93d93537 145 size_t i = 0, len = 0, item_len;
ef79b1f8
NTND
146 if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
147 continue;
93d93537
NTND
148 if (pathspec->items[n].magic & PATHSPEC_ICASE)
149 item_len = pathspec->items[n].prefix;
150 else
151 item_len = pathspec->items[n].nowildcard_len;
152 while (i < item_len && (n == 0 || i < max)) {
827f4d6c
NTND
153 char c = pathspec->items[n].match[i];
154 if (c != pathspec->items[0].match[i])
4a085b16
JH
155 break;
156 if (c == '/')
157 len = i + 1;
827f4d6c 158 i++;
4a085b16 159 }
827f4d6c 160 if (n == 0 || len < max) {
4a085b16
JH
161 max = len;
162 if (!max)
163 break;
164 }
3c6a370b 165 }
4a085b16 166 return max;
3c6a370b
LT
167}
168
f950eb95
CB
169/*
170 * Returns a copy of the longest leading path common among all
171 * pathspecs.
172 */
827f4d6c 173char *common_prefix(const struct pathspec *pathspec)
f950eb95
CB
174{
175 unsigned long len = common_prefix_len(pathspec);
176
827f4d6c 177 return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
f950eb95
CB
178}
179
7327d3d1 180int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
1d8842d9 181{
4a085b16 182 size_t len;
1d8842d9
LT
183
184 /*
185 * Calculate common prefix for the pathspec, and
186 * use that to optimize the directory walk
187 */
4a085b16 188 len = common_prefix_len(pathspec);
1d8842d9
LT
189
190 /* Read the directory and prune it */
b3920bbd 191 read_directory(dir, pathspec->nr ? pathspec->_raw[0] : "", len, pathspec);
dba2e203 192 return len;
1d8842d9
LT
193}
194
bc96cc87
NTND
195int within_depth(const char *name, int namelen,
196 int depth, int max_depth)
197{
198 const char *cp = name, *cpe = name + namelen;
199
200 while (cp < cpe) {
201 if (*cp++ != '/')
202 continue;
203 depth++;
204 if (depth > max_depth)
205 return 0;
206 }
207 return 1;
208}
209
42b0874a 210#define DO_MATCH_EXCLUDE 1
68690fdd 211#define DO_MATCH_DIRECTORY 2
42b0874a 212
61cf2820
NTND
213/*
214 * Does 'match' match the given name?
215 * A match is found if
216 *
217 * (1) the 'match' string is leading directory of 'name', or
218 * (2) the 'match' string is a wildcard and matches 'name', or
219 * (3) the 'match' string is exactly the same as 'name'.
220 *
221 * and the return value tells which case it was.
222 *
223 * It returns 0 when there is no match.
224 */
225static int match_pathspec_item(const struct pathspec_item *item, int prefix,
42b0874a 226 const char *name, int namelen, unsigned flags)
61cf2820
NTND
227{
228 /* name/namelen has prefix cut off by caller */
229 const char *match = item->match + prefix;
230 int matchlen = item->len - prefix;
231
93d93537
NTND
232 /*
233 * The normal call pattern is:
234 * 1. prefix = common_prefix_len(ps);
235 * 2. prune something, or fill_directory
854b0959 236 * 3. match_pathspec()
93d93537
NTND
237 *
238 * 'prefix' at #1 may be shorter than the command's prefix and
239 * it's ok for #2 to match extra files. Those extras will be
240 * trimmed at #3.
241 *
242 * Suppose the pathspec is 'foo' and '../bar' running from
243 * subdir 'xyz'. The common prefix at #1 will be empty, thanks
244 * to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
245 * user does not want XYZ/foo, only the "foo" part should be
246 * case-insensitive. We need to filter out XYZ/foo here. In
247 * other words, we do not trust the caller on comparing the
248 * prefix part when :(icase) is involved. We do exact
249 * comparison ourselves.
250 *
251 * Normally the caller (common_prefix_len() in fact) does
252 * _exact_ matching on name[-prefix+1..-1] and we do not need
253 * to check that part. Be defensive and check it anyway, in
254 * case common_prefix_len is changed, or a new caller is
255 * introduced that does not use common_prefix_len.
256 *
257 * If the penalty turns out too high when prefix is really
258 * long, maybe change it to
259 * strncmp(match, name, item->prefix - prefix)
260 */
261 if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
262 strncmp(item->match, name - prefix, item->prefix))
263 return 0;
264
61cf2820
NTND
265 /* If the match was just the prefix, we matched */
266 if (!*match)
267 return MATCHED_RECURSIVELY;
268
93d93537 269 if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
61cf2820
NTND
270 if (matchlen == namelen)
271 return MATCHED_EXACTLY;
272
273 if (match[matchlen-1] == '/' || name[matchlen] == '/')
274 return MATCHED_RECURSIVELY;
68690fdd
NTND
275 } else if ((flags & DO_MATCH_DIRECTORY) &&
276 match[matchlen - 1] == '/' &&
277 namelen == matchlen - 1 &&
278 !ps_strncmp(item, match, name, namelen))
279 return MATCHED_EXACTLY;
61cf2820 280
5d74762d 281 if (item->nowildcard_len < item->len &&
bd30c2e4 282 !git_fnmatch(item, match, name,
8c6abbcd 283 item->nowildcard_len - prefix))
61cf2820
NTND
284 return MATCHED_FNMATCH;
285
286 return 0;
287}
288
289/*
52ed1894
AS
290 * Given a name and a list of pathspecs, returns the nature of the
291 * closest (i.e. most specific) match of the name to any of the
292 * pathspecs.
293 *
294 * The caller typically calls this multiple times with the same
295 * pathspec and seen[] array but with different name/namelen
296 * (e.g. entries from the index) and is interested in seeing if and
297 * how each pathspec matches all the names it calls this function
298 * with. A mark is left in the seen[] array for each pathspec element
299 * indicating the closest type of match that element achieved, so if
300 * seen[n] remains zero after multiple invocations, that means the nth
301 * pathspec did not match any names, which could indicate that the
302 * user mistyped the nth pathspec.
61cf2820 303 */
854b0959
NTND
304static int do_match_pathspec(const struct pathspec *ps,
305 const char *name, int namelen,
306 int prefix, char *seen,
42b0874a 307 unsigned flags)
61cf2820 308{
42b0874a 309 int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
61cf2820 310
5c6933d2
NTND
311 GUARD_PATHSPEC(ps,
312 PATHSPEC_FROMTOP |
313 PATHSPEC_MAXDEPTH |
bd30c2e4 314 PATHSPEC_LITERAL |
93d93537 315 PATHSPEC_GLOB |
ef79b1f8
NTND
316 PATHSPEC_ICASE |
317 PATHSPEC_EXCLUDE);
8f4f8f45 318
61cf2820 319 if (!ps->nr) {
6330a171
NTND
320 if (!ps->recursive ||
321 !(ps->magic & PATHSPEC_MAXDEPTH) ||
322 ps->max_depth == -1)
61cf2820
NTND
323 return MATCHED_RECURSIVELY;
324
325 if (within_depth(name, namelen, 0, ps->max_depth))
326 return MATCHED_EXACTLY;
327 else
328 return 0;
329 }
330
331 name += prefix;
332 namelen -= prefix;
333
334 for (i = ps->nr - 1; i >= 0; i--) {
335 int how;
ef79b1f8
NTND
336
337 if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
338 ( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
339 continue;
340
61cf2820
NTND
341 if (seen && seen[i] == MATCHED_EXACTLY)
342 continue;
ef79b1f8
NTND
343 /*
344 * Make exclude patterns optional and never report
345 * "pathspec ':(exclude)foo' matches no files"
346 */
347 if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
348 seen[i] = MATCHED_FNMATCH;
42b0874a
NTND
349 how = match_pathspec_item(ps->items+i, prefix, name,
350 namelen, flags);
6330a171
NTND
351 if (ps->recursive &&
352 (ps->magic & PATHSPEC_MAXDEPTH) &&
353 ps->max_depth != -1 &&
61cf2820
NTND
354 how && how != MATCHED_FNMATCH) {
355 int len = ps->items[i].len;
356 if (name[len] == '/')
357 len++;
358 if (within_depth(name+len, namelen-len, 0, ps->max_depth))
359 how = MATCHED_EXACTLY;
360 else
361 how = 0;
362 }
363 if (how) {
364 if (retval < how)
365 retval = how;
366 if (seen && seen[i] < how)
367 seen[i] = how;
368 }
369 }
370 return retval;
371}
372
854b0959
NTND
373int match_pathspec(const struct pathspec *ps,
374 const char *name, int namelen,
ae8d0824 375 int prefix, char *seen, int is_dir)
ef79b1f8
NTND
376{
377 int positive, negative;
ae8d0824 378 unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
42b0874a
NTND
379 positive = do_match_pathspec(ps, name, namelen,
380 prefix, seen, flags);
ef79b1f8
NTND
381 if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
382 return positive;
42b0874a
NTND
383 negative = do_match_pathspec(ps, name, namelen,
384 prefix, seen,
385 flags | DO_MATCH_EXCLUDE);
ef79b1f8
NTND
386 return negative ? 0 : positive;
387}
388
777c55a6
JH
389int report_path_error(const char *ps_matched,
390 const struct pathspec *pathspec,
391 const char *prefix)
392{
393 /*
394 * Make sure all pathspec matched; otherwise it is an error.
395 */
777c55a6
JH
396 int num, errors = 0;
397 for (num = 0; num < pathspec->nr; num++) {
398 int other, found_dup;
399
400 if (ps_matched[num])
401 continue;
402 /*
403 * The caller might have fed identical pathspec
404 * twice. Do not barf on such a mistake.
405 * FIXME: parse_pathspec should have eliminated
406 * duplicate pathspec.
407 */
408 for (found_dup = other = 0;
409 !found_dup && other < pathspec->nr;
410 other++) {
411 if (other == num || !ps_matched[other])
412 continue;
413 if (!strcmp(pathspec->items[other].original,
414 pathspec->items[num].original))
415 /*
416 * Ok, we have a match already.
417 */
418 found_dup = 1;
419 }
420 if (found_dup)
421 continue;
422
423 error("pathspec '%s' did not match any file(s) known to git.",
424 pathspec->items[num].original);
425 errors++;
426 }
777c55a6
JH
427 return errors;
428}
429
fcd631ed
NTND
430/*
431 * Return the length of the "simple" part of a path match limiter.
432 */
87323bda 433int simple_length(const char *match)
fcd631ed
NTND
434{
435 int len = -1;
436
437 for (;;) {
438 unsigned char c = *match++;
439 len++;
440 if (c == '\0' || is_glob_special(c))
441 return len;
442 }
443}
444
87323bda 445int no_wildcard(const char *string)
68492fc7 446{
fcd631ed 447 return string[simple_length(string)] == '\0';
68492fc7
LK
448}
449
82dce998
NTND
450void parse_exclude_pattern(const char **pattern,
451 int *patternlen,
f8708998 452 unsigned *flags,
82dce998 453 int *nowildcardlen)
84460eec
NTND
454{
455 const char *p = *pattern;
456 size_t i, len;
457
458 *flags = 0;
459 if (*p == '!') {
460 *flags |= EXC_FLAG_NEGATIVE;
461 p++;
462 }
463 len = strlen(p);
464 if (len && p[len - 1] == '/') {
465 len--;
466 *flags |= EXC_FLAG_MUSTBEDIR;
467 }
468 for (i = 0; i < len; i++) {
469 if (p[i] == '/')
470 break;
471 }
472 if (i == len)
473 *flags |= EXC_FLAG_NODIR;
474 *nowildcardlen = simple_length(p);
475 /*
476 * we should have excluded the trailing slash from 'p' too,
477 * but that's one more allocation. Instead just make sure
478 * nowildcardlen does not exceed real patternlen
479 */
480 if (*nowildcardlen > len)
481 *nowildcardlen = len;
482 if (*p == '*' && no_wildcard(p + 1))
483 *flags |= EXC_FLAG_ENDSWITH;
484 *pattern = p;
485 *patternlen = len;
486}
487
453ec4bd 488void add_exclude(const char *string, const char *base,
c04318e4 489 int baselen, struct exclude_list *el, int srcpos)
453ec4bd 490{
d6b8fc30 491 struct exclude *x;
84460eec 492 int patternlen;
f8708998 493 unsigned flags;
84460eec 494 int nowildcardlen;
453ec4bd 495
84460eec
NTND
496 parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
497 if (flags & EXC_FLAG_MUSTBEDIR) {
96ffc06f 498 FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
d6b8fc30
JH
499 } else {
500 x = xmalloc(sizeof(*x));
501 x->pattern = string;
502 }
84460eec
NTND
503 x->patternlen = patternlen;
504 x->nowildcardlen = nowildcardlen;
453ec4bd
LT
505 x->base = base;
506 x->baselen = baselen;
d6b8fc30 507 x->flags = flags;
c04318e4 508 x->srcpos = srcpos;
840fc334
AS
509 ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
510 el->excludes[el->nr++] = x;
c04318e4 511 x->el = el;
453ec4bd
LT
512}
513
55fe6f51
NTND
514static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
515 struct sha1_stat *sha1_stat)
c28b3d6e
NTND
516{
517 int pos, len;
518 unsigned long sz;
519 enum object_type type;
520 void *data;
c28b3d6e
NTND
521
522 len = strlen(path);
71261027 523 pos = cache_name_pos(path, len);
c28b3d6e
NTND
524 if (pos < 0)
525 return NULL;
71261027 526 if (!ce_skip_worktree(active_cache[pos]))
c28b3d6e 527 return NULL;
71261027 528 data = read_sha1_file(active_cache[pos]->sha1, &type, &sz);
c28b3d6e
NTND
529 if (!data || type != OBJ_BLOB) {
530 free(data);
531 return NULL;
532 }
533 *size = xsize_t(sz);
55fe6f51
NTND
534 if (sha1_stat) {
535 memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
536 hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
537 }
c28b3d6e
NTND
538 return data;
539}
540
f6198812
AS
541/*
542 * Frees memory within el which was allocated for exclude patterns and
543 * the file buffer. Does not free el itself.
544 */
545void clear_exclude_list(struct exclude_list *el)
0fd0e241
NTND
546{
547 int i;
548
5cee3493 549 for (i = 0; i < el->nr; i++)
0fd0e241
NTND
550 free(el->excludes[i]);
551 free(el->excludes);
c082df24 552 free(el->filebuf);
0fd0e241 553
2653a8c6 554 memset(el, 0, sizeof(*el));
0fd0e241
NTND
555}
556
7e2e4b37 557static void trim_trailing_spaces(char *buf)
16402b99 558{
e61a6c1d
PB
559 char *p, *last_space = NULL;
560
561 for (p = buf; *p; p++)
562 switch (*p) {
563 case ' ':
564 if (!last_space)
565 last_space = p;
566 break;
567 case '\\':
568 p++;
569 if (!*p)
570 return;
571 /* fallthrough */
572 default:
573 last_space = NULL;
574 }
575
576 if (last_space)
577 *last_space = '\0';
16402b99
NTND
578}
579
0dcb8d7f
NTND
580/*
581 * Given a subdirectory name and "dir" of the current directory,
582 * search the subdir in "dir" and return it, or create a new one if it
583 * does not exist in "dir".
584 *
585 * If "name" has the trailing slash, it'll be excluded in the search.
586 */
587static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
588 struct untracked_cache_dir *dir,
589 const char *name, int len)
590{
591 int first, last;
592 struct untracked_cache_dir *d;
593 if (!dir)
594 return NULL;
595 if (len && name[len - 1] == '/')
596 len--;
597 first = 0;
598 last = dir->dirs_nr;
599 while (last > first) {
600 int cmp, next = (last + first) >> 1;
601 d = dir->dirs[next];
602 cmp = strncmp(name, d->name, len);
603 if (!cmp && strlen(d->name) > len)
604 cmp = -1;
605 if (!cmp)
606 return d;
607 if (cmp < 0) {
608 last = next;
609 continue;
610 }
611 first = next+1;
612 }
613
614 uc->dir_created++;
96ffc06f 615 FLEX_ALLOC_MEM(d, name, name, len);
0dcb8d7f
NTND
616
617 ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
618 memmove(dir->dirs + first + 1, dir->dirs + first,
619 (dir->dirs_nr - first) * sizeof(*dir->dirs));
620 dir->dirs_nr++;
621 dir->dirs[first] = d;
622 return d;
623}
624
ccad261f
NTND
625static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
626{
627 int i;
628 dir->valid = 0;
629 dir->untracked_nr = 0;
630 for (i = 0; i < dir->dirs_nr; i++)
631 do_invalidate_gitignore(dir->dirs[i]);
632}
633
634static void invalidate_gitignore(struct untracked_cache *uc,
635 struct untracked_cache_dir *dir)
636{
637 uc->gitignore_invalidated++;
638 do_invalidate_gitignore(dir);
639}
640
91a2288b
NTND
641static void invalidate_directory(struct untracked_cache *uc,
642 struct untracked_cache_dir *dir)
643{
26cb0182 644 int i;
91a2288b
NTND
645 uc->dir_invalidated++;
646 dir->valid = 0;
647 dir->untracked_nr = 0;
26cb0182
NTND
648 for (i = 0; i < dir->dirs_nr; i++)
649 dir->dirs[i]->recurse = 0;
91a2288b
NTND
650}
651
55fe6f51
NTND
652/*
653 * Given a file with name "fname", read it (either from disk, or from
654 * the index if "check_index" is non-zero), parse it and store the
655 * exclude rules in "el".
656 *
657 * If "ss" is not NULL, compute SHA-1 of the exclude file and fill
658 * stat data from disk (only valid if add_excludes returns zero). If
659 * ss_valid is non-zero, "ss" must contain good value as input.
660 */
661static int add_excludes(const char *fname, const char *base, int baselen,
662 struct exclude_list *el, int check_index,
663 struct sha1_stat *sha1_stat)
453ec4bd 664{
c470701a 665 struct stat st;
c04318e4 666 int fd, i, lineno = 1;
9d14017a 667 size_t size = 0;
453ec4bd
LT
668 char *buf, *entry;
669
670 fd = open(fname, O_RDONLY);
c28b3d6e 671 if (fd < 0 || fstat(fd, &st) < 0) {
69660731 672 if (errno != ENOENT)
55b38a48 673 warn_on_inaccessible(fname);
c28b3d6e
NTND
674 if (0 <= fd)
675 close(fd);
676 if (!check_index ||
55fe6f51 677 (buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
c28b3d6e 678 return -1;
45d76f17
NTND
679 if (size == 0) {
680 free(buf);
681 return 0;
682 }
683 if (buf[size-1] != '\n') {
50a6c8ef 684 buf = xrealloc(buf, st_add(size, 1));
45d76f17
NTND
685 buf[size++] = '\n';
686 }
d961baa8 687 } else {
c28b3d6e
NTND
688 size = xsize_t(st.st_size);
689 if (size == 0) {
55fe6f51
NTND
690 if (sha1_stat) {
691 fill_stat_data(&sha1_stat->stat, &st);
692 hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
693 sha1_stat->valid = 1;
694 }
c28b3d6e
NTND
695 close(fd);
696 return 0;
697 }
3733e694 698 buf = xmallocz(size);
c28b3d6e 699 if (read_in_full(fd, buf, size) != size) {
45d76f17 700 free(buf);
c28b3d6e
NTND
701 close(fd);
702 return -1;
703 }
45d76f17 704 buf[size++] = '\n';
c28b3d6e 705 close(fd);
55fe6f51
NTND
706 if (sha1_stat) {
707 int pos;
708 if (sha1_stat->valid &&
ed4efab1 709 !match_stat_data_racy(&the_index, &sha1_stat->stat, &st))
55fe6f51
NTND
710 ; /* no content change, ss->sha1 still good */
711 else if (check_index &&
712 (pos = cache_name_pos(fname, strlen(fname))) >= 0 &&
713 !ce_stage(active_cache[pos]) &&
714 ce_uptodate(active_cache[pos]) &&
715 !would_convert_to_git(fname))
716 hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
717 else
718 hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
719 fill_stat_data(&sha1_stat->stat, &st);
720 sha1_stat->valid = 1;
721 }
6ba78238 722 }
453ec4bd 723
c082df24 724 el->filebuf = buf;
245e1c19 725
dde843e7
JH
726 if (skip_utf8_bom(&buf, size))
727 size -= buf - el->filebuf;
728
453ec4bd 729 entry = buf;
245e1c19 730
45d76f17
NTND
731 for (i = 0; i < size; i++) {
732 if (buf[i] == '\n') {
453ec4bd
LT
733 if (entry != buf + i && entry[0] != '#') {
734 buf[i - (i && buf[i-1] == '\r')] = 0;
7e2e4b37 735 trim_trailing_spaces(entry);
c04318e4 736 add_exclude(entry, base, baselen, el, lineno);
453ec4bd 737 }
c04318e4 738 lineno++;
453ec4bd
LT
739 entry = buf + i + 1;
740 }
741 }
742 return 0;
453ec4bd
LT
743}
744
55fe6f51
NTND
745int add_excludes_from_file_to_list(const char *fname, const char *base,
746 int baselen, struct exclude_list *el,
747 int check_index)
748{
749 return add_excludes(fname, base, baselen, el, check_index, NULL);
750}
751
c04318e4
AS
752struct exclude_list *add_exclude_list(struct dir_struct *dir,
753 int group_type, const char *src)
c082df24
AS
754{
755 struct exclude_list *el;
756 struct exclude_list_group *group;
757
758 group = &dir->exclude_list_group[group_type];
759 ALLOC_GROW(group->el, group->nr + 1, group->alloc);
760 el = &group->el[group->nr++];
761 memset(el, 0, sizeof(*el));
c04318e4 762 el->src = src;
c082df24
AS
763 return el;
764}
765
766/*
767 * Used to set up core.excludesfile and .git/info/exclude lists.
768 */
0dcb8d7f
NTND
769static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
770 struct sha1_stat *sha1_stat)
453ec4bd 771{
c082df24 772 struct exclude_list *el;
ccad261f
NTND
773 /*
774 * catch setup_standard_excludes() that's called before
775 * dir->untracked is assigned. That function behaves
776 * differently when dir->untracked is non-NULL.
777 */
778 if (!dir->untracked)
779 dir->unmanaged_exclude_files++;
c04318e4 780 el = add_exclude_list(dir, EXC_FILE, fname);
0dcb8d7f 781 if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0)
453ec4bd
LT
782 die("cannot use %s as an exclude file", fname);
783}
784
0dcb8d7f
NTND
785void add_excludes_from_file(struct dir_struct *dir, const char *fname)
786{
ccad261f 787 dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
0dcb8d7f
NTND
788 add_excludes_from_file_1(dir, fname, NULL);
789}
790
82dce998
NTND
791int match_basename(const char *basename, int basenamelen,
792 const char *pattern, int prefix, int patternlen,
f8708998 793 unsigned flags)
593cb880
NTND
794{
795 if (prefix == patternlen) {
0b6e56df 796 if (patternlen == basenamelen &&
ba0897e6 797 !fspathncmp(pattern, basename, basenamelen))
593cb880
NTND
798 return 1;
799 } else if (flags & EXC_FLAG_ENDSWITH) {
0b6e56df 800 /* "*literal" matching against "fooliteral" */
593cb880 801 if (patternlen - 1 <= basenamelen &&
ba0897e6 802 !fspathncmp(pattern + 1,
0b6e56df
JH
803 basename + basenamelen - (patternlen - 1),
804 patternlen - 1))
593cb880
NTND
805 return 1;
806 } else {
0b6e56df
JH
807 if (fnmatch_icase_mem(pattern, patternlen,
808 basename, basenamelen,
809 0) == 0)
593cb880
NTND
810 return 1;
811 }
812 return 0;
813}
814
82dce998
NTND
815int match_pathname(const char *pathname, int pathlen,
816 const char *base, int baselen,
817 const char *pattern, int prefix, int patternlen,
f8708998 818 unsigned flags)
b5592632
NTND
819{
820 const char *name;
821 int namelen;
822
823 /*
824 * match with FNM_PATHNAME; the pattern has base implicitly
825 * in front of it.
826 */
827 if (*pattern == '/') {
828 pattern++;
982ac873 829 patternlen--;
b5592632
NTND
830 prefix--;
831 }
832
833 /*
834 * baselen does not count the trailing slash. base[] may or
835 * may not end with a trailing slash though.
836 */
837 if (pathlen < baselen + 1 ||
838 (baselen && pathname[baselen] != '/') ||
ba0897e6 839 fspathncmp(pathname, base, baselen))
b5592632
NTND
840 return 0;
841
842 namelen = baselen ? pathlen - baselen - 1 : pathlen;
843 name = pathname + pathlen - namelen;
844
845 if (prefix) {
846 /*
847 * if the non-wildcard part is longer than the
848 * remaining pathname, surely it cannot match.
849 */
850 if (prefix > namelen)
851 return 0;
852
ba0897e6 853 if (fspathncmp(pattern, name, prefix))
b5592632
NTND
854 return 0;
855 pattern += prefix;
ab3aebc1 856 patternlen -= prefix;
b5592632
NTND
857 name += prefix;
858 namelen -= prefix;
ab3aebc1
JK
859
860 /*
861 * If the whole pattern did not have a wildcard,
862 * then our prefix match is all we need; we
863 * do not need to call fnmatch at all.
864 */
5cee3493 865 if (!patternlen && !namelen)
ab3aebc1 866 return 1;
b5592632
NTND
867 }
868
ab3aebc1
JK
869 return fnmatch_icase_mem(pattern, patternlen,
870 name, namelen,
f30366b2 871 WM_PATHNAME) == 0;
b5592632
NTND
872}
873
578cd7c3
AS
874/*
875 * Scan the given exclude list in reverse to see whether pathname
876 * should be ignored. The first match (i.e. the last on the list), if
877 * any, determines the fate. Returns the exclude_list element which
878 * matched, or NULL for undecided.
453ec4bd 879 */
578cd7c3
AS
880static struct exclude *last_exclude_matching_from_list(const char *pathname,
881 int pathlen,
882 const char *basename,
883 int *dtype,
884 struct exclude_list *el)
453ec4bd 885{
e6efecc4 886 struct exclude *exc = NULL; /* undecided */
5cee3493 887 int i;
453ec4bd 888
35a94d44 889 if (!el->nr)
578cd7c3 890 return NULL; /* undefined */
d6b8fc30 891
35a94d44
NTND
892 for (i = el->nr - 1; 0 <= i; i--) {
893 struct exclude *x = el->excludes[i];
b5592632 894 const char *exclude = x->pattern;
b5592632 895 int prefix = x->nowildcardlen;
35a94d44
NTND
896
897 if (x->flags & EXC_FLAG_MUSTBEDIR) {
898 if (*dtype == DT_UNKNOWN)
899 *dtype = get_dtype(NULL, pathname, pathlen);
900 if (*dtype != DT_DIR)
901 continue;
902 }
d6b8fc30 903
35a94d44 904 if (x->flags & EXC_FLAG_NODIR) {
593cb880
NTND
905 if (match_basename(basename,
906 pathlen - (basename - pathname),
907 exclude, prefix, x->patternlen,
e6efecc4
NTND
908 x->flags)) {
909 exc = x;
910 break;
911 }
35a94d44
NTND
912 continue;
913 }
914
b5592632
NTND
915 assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
916 if (match_pathname(pathname, pathlen,
917 x->base, x->baselen ? x->baselen - 1 : 0,
e6efecc4
NTND
918 exclude, prefix, x->patternlen, x->flags)) {
919 exc = x;
920 break;
921 }
453ec4bd 922 }
e6efecc4 923 return exc;
578cd7c3
AS
924}
925
926/*
927 * Scan the list and let the last match determine the fate.
928 * Return 1 for exclude, 0 for include and -1 for undecided.
929 */
930int is_excluded_from_list(const char *pathname,
931 int pathlen, const char *basename, int *dtype,
932 struct exclude_list *el)
933{
934 struct exclude *exclude;
935 exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);
936 if (exclude)
937 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
938 return -1; /* undecided */
939}
940
46aa2f95
KB
941static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
942 const char *pathname, int pathlen, const char *basename,
943 int *dtype_p)
944{
945 int i, j;
946 struct exclude_list_group *group;
947 struct exclude *exclude;
948 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
949 group = &dir->exclude_list_group[i];
950 for (j = group->nr - 1; j >= 0; j--) {
951 exclude = last_exclude_matching_from_list(
952 pathname, pathlen, basename, dtype_p,
953 &group->el[j]);
954 if (exclude)
955 return exclude;
956 }
957 }
958 return NULL;
959}
960
6cd5c582
KB
961/*
962 * Loads the per-directory exclude list for the substring of base
963 * which has a char length of baselen.
964 */
965static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
966{
967 struct exclude_list_group *group;
968 struct exclude_list *el;
969 struct exclude_stack *stk = NULL;
0dcb8d7f 970 struct untracked_cache_dir *untracked;
6cd5c582
KB
971 int current;
972
6cd5c582
KB
973 group = &dir->exclude_list_group[EXC_DIRS];
974
d961baa8
NTND
975 /*
976 * Pop the exclude lists from the EXCL_DIRS exclude_list_group
6cd5c582 977 * which originate from directories not in the prefix of the
d961baa8
NTND
978 * path being checked.
979 */
6cd5c582
KB
980 while ((stk = dir->exclude_stack) != NULL) {
981 if (stk->baselen <= baselen &&
aceb9429 982 !strncmp(dir->basebuf.buf, base, stk->baselen))
6cd5c582
KB
983 break;
984 el = &group->el[dir->exclude_stack->exclude_ix];
985 dir->exclude_stack = stk->prev;
95c6f271 986 dir->exclude = NULL;
aceb9429 987 free((char *)el->src); /* see strbuf_detach() below */
6cd5c582
KB
988 clear_exclude_list(el);
989 free(stk);
990 group->nr--;
991 }
992
95c6f271
KB
993 /* Skip traversing into sub directories if the parent is excluded */
994 if (dir->exclude)
995 return;
996
aceb9429
NTND
997 /*
998 * Lazy initialization. All call sites currently just
999 * memset(dir, 0, sizeof(*dir)) before use. Changing all of
1000 * them seems lots of work for little benefit.
1001 */
1002 if (!dir->basebuf.buf)
1003 strbuf_init(&dir->basebuf, PATH_MAX);
1004
6cd5c582
KB
1005 /* Read from the parent directories and push them down. */
1006 current = stk ? stk->baselen : -1;
aceb9429 1007 strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
0dcb8d7f
NTND
1008 if (dir->untracked)
1009 untracked = stk ? stk->ucd : dir->untracked->root;
1010 else
1011 untracked = NULL;
1012
6cd5c582 1013 while (current < baselen) {
6cd5c582 1014 const char *cp;
0dcb8d7f 1015 struct sha1_stat sha1_stat;
6cd5c582 1016
03e11a71 1017 stk = xcalloc(1, sizeof(*stk));
6cd5c582
KB
1018 if (current < 0) {
1019 cp = base;
1020 current = 0;
d961baa8 1021 } else {
6cd5c582
KB
1022 cp = strchr(base + current + 1, '/');
1023 if (!cp)
1024 die("oops in prep_exclude");
1025 cp++;
0dcb8d7f
NTND
1026 untracked =
1027 lookup_untracked(dir->untracked, untracked,
1028 base + current,
1029 cp - base - current);
6cd5c582
KB
1030 }
1031 stk->prev = dir->exclude_stack;
1032 stk->baselen = cp - base;
95c6f271 1033 stk->exclude_ix = group->nr;
0dcb8d7f 1034 stk->ucd = untracked;
95c6f271 1035 el = add_exclude_list(dir, EXC_DIRS, NULL);
aceb9429
NTND
1036 strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
1037 assert(stk->baselen == dir->basebuf.len);
95c6f271
KB
1038
1039 /* Abort if the directory is excluded */
1040 if (stk->baselen) {
1041 int dt = DT_DIR;
aceb9429 1042 dir->basebuf.buf[stk->baselen - 1] = 0;
95c6f271 1043 dir->exclude = last_exclude_matching_from_lists(dir,
aceb9429
NTND
1044 dir->basebuf.buf, stk->baselen - 1,
1045 dir->basebuf.buf + current, &dt);
1046 dir->basebuf.buf[stk->baselen - 1] = '/';
c3c327de
KB
1047 if (dir->exclude &&
1048 dir->exclude->flags & EXC_FLAG_NEGATIVE)
1049 dir->exclude = NULL;
95c6f271 1050 if (dir->exclude) {
95c6f271
KB
1051 dir->exclude_stack = stk;
1052 return;
1053 }
1054 }
1055
aceb9429 1056 /* Try to read per-directory file */
0dcb8d7f
NTND
1057 hashclr(sha1_stat.sha1);
1058 sha1_stat.valid = 0;
27b099ae
NTND
1059 if (dir->exclude_per_dir &&
1060 /*
1061 * If we know that no files have been added in
1062 * this directory (i.e. valid_cached_dir() has
1063 * been executed and set untracked->valid) ..
1064 */
1065 (!untracked || !untracked->valid ||
1066 /*
1067 * .. and .gitignore does not exist before
7687252f
DT
1068 * (i.e. null exclude_sha1). Then we can skip
1069 * loading .gitignore, which would result in
1070 * ENOENT anyway.
27b099ae
NTND
1071 */
1072 !is_null_sha1(untracked->exclude_sha1))) {
95c6f271
KB
1073 /*
1074 * dir->basebuf gets reused by the traversal, but we
1075 * need fname to remain unchanged to ensure the src
1076 * member of each struct exclude correctly
1077 * back-references its source file. Other invocations
1078 * of add_exclude_list provide stable strings, so we
aceb9429 1079 * strbuf_detach() and free() here in the caller.
95c6f271 1080 */
aceb9429
NTND
1081 struct strbuf sb = STRBUF_INIT;
1082 strbuf_addbuf(&sb, &dir->basebuf);
1083 strbuf_addstr(&sb, dir->exclude_per_dir);
1084 el->src = strbuf_detach(&sb, NULL);
0dcb8d7f
NTND
1085 add_excludes(el->src, el->src, stk->baselen, el, 1,
1086 untracked ? &sha1_stat : NULL);
1087 }
5ebf79ad
NTND
1088 /*
1089 * NEEDSWORK: when untracked cache is enabled, prep_exclude()
1090 * will first be called in valid_cached_dir() then maybe many
1091 * times more in last_exclude_matching(). When the cache is
1092 * used, last_exclude_matching() will not be called and
1093 * reading .gitignore content will be a waste.
1094 *
1095 * So when it's called by valid_cached_dir() and we can get
1096 * .gitignore SHA-1 from the index (i.e. .gitignore is not
1097 * modified on work tree), we could delay reading the
1098 * .gitignore content until we absolutely need it in
1099 * last_exclude_matching(). Be careful about ignore rule
1100 * order, though, if you do that.
1101 */
1102 if (untracked &&
1103 hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
1104 invalidate_gitignore(dir->untracked, untracked);
0dcb8d7f 1105 hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
95c6f271 1106 }
6cd5c582
KB
1107 dir->exclude_stack = stk;
1108 current = stk->baselen;
1109 }
aceb9429 1110 strbuf_setlen(&dir->basebuf, baselen);
6cd5c582
KB
1111}
1112
f4cd69a6
AS
1113/*
1114 * Loads the exclude lists for the directory containing pathname, then
1115 * scans all exclude lists to determine whether pathname is excluded.
1116 * Returns the exclude_list element which matched, or NULL for
1117 * undecided.
1118 */
b07bc8c8 1119struct exclude *last_exclude_matching(struct dir_struct *dir,
f4cd69a6
AS
1120 const char *pathname,
1121 int *dtype_p)
453ec4bd
LT
1122{
1123 int pathlen = strlen(pathname);
68492fc7
LK
1124 const char *basename = strrchr(pathname, '/');
1125 basename = (basename) ? basename+1 : pathname;
453ec4bd 1126
63d285c8 1127 prep_exclude(dir, pathname, basename-pathname);
c082df24 1128
95c6f271
KB
1129 if (dir->exclude)
1130 return dir->exclude;
1131
46aa2f95
KB
1132 return last_exclude_matching_from_lists(dir, pathname, pathlen,
1133 basename, dtype_p);
f4cd69a6
AS
1134}
1135
1136/*
1137 * Loads the exclude lists for the directory containing pathname, then
1138 * scans all exclude lists to determine whether pathname is excluded.
1139 * Returns 1 if true, otherwise 0.
1140 */
b07bc8c8 1141int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
f4cd69a6
AS
1142{
1143 struct exclude *exclude =
1144 last_exclude_matching(dir, pathname, dtype_p);
1145 if (exclude)
1146 return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
453ec4bd
LT
1147 return 0;
1148}
1149
f3fa1838
JH
1150static struct dir_entry *dir_entry_new(const char *pathname, int len)
1151{
453ec4bd
LT
1152 struct dir_entry *ent;
1153
96ffc06f 1154 FLEX_ALLOC_MEM(ent, name, pathname, len);
453ec4bd 1155 ent->len = len;
4d06f8ac 1156 return ent;
453ec4bd
LT
1157}
1158
159b3212 1159static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
6815e569 1160{
ebbd7439 1161 if (cache_file_exists(pathname, len, ignore_case))
6815e569
JK
1162 return NULL;
1163
25fd2f7a 1164 ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
6815e569
JK
1165 return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
1166}
1167
108da0db 1168struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)
2abd31b0 1169{
6e4f981f 1170 if (!cache_name_is_other(pathname, len))
2abd31b0
JK
1171 return NULL;
1172
25fd2f7a 1173 ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
2abd31b0
JK
1174 return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
1175}
1176
09595258
LT
1177enum exist_status {
1178 index_nonexistent = 0,
1179 index_directory,
4b05548f 1180 index_gitdir
09595258
LT
1181};
1182
5102c617 1183/*
71261027 1184 * Do not use the alphabetically sorted index to look up
5102c617 1185 * the directory name; instead, use the case insensitive
ebbd7439 1186 * directory hash.
5102c617
JJ
1187 */
1188static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
1189{
41284eb0 1190 struct cache_entry *ce;
5102c617 1191
41284eb0 1192 if (cache_dir_exists(dirname, len))
5102c617
JJ
1193 return index_directory;
1194
41284eb0
DT
1195 ce = cache_file_exists(dirname, len, ignore_case);
1196 if (ce && S_ISGITLINK(ce->ce_mode))
5102c617
JJ
1197 return index_gitdir;
1198
5102c617
JJ
1199 return index_nonexistent;
1200}
1201
09595258
LT
1202/*
1203 * The index sorts alphabetically by entry name, which
1204 * means that a gitlink sorts as '\0' at the end, while
1205 * a directory (which is defined not as an entry, but as
1206 * the files it contains) will sort with the '/' at the
1207 * end.
1208 */
1209static enum exist_status directory_exists_in_index(const char *dirname, int len)
453ec4bd 1210{
5102c617
JJ
1211 int pos;
1212
1213 if (ignore_case)
1214 return directory_exists_in_index_icase(dirname, len);
1215
1216 pos = cache_name_pos(dirname, len);
09595258
LT
1217 if (pos < 0)
1218 pos = -pos-1;
1219 while (pos < active_nr) {
9c5e6c80 1220 const struct cache_entry *ce = active_cache[pos++];
09595258
LT
1221 unsigned char endchar;
1222
1223 if (strncmp(ce->name, dirname, len))
1224 break;
1225 endchar = ce->name[len];
1226 if (endchar > '/')
1227 break;
1228 if (endchar == '/')
1229 return index_directory;
7a51ed66 1230 if (!endchar && S_ISGITLINK(ce->ce_mode))
09595258
LT
1231 return index_gitdir;
1232 }
1233 return index_nonexistent;
1234}
1235
1236/*
1237 * When we find a directory when traversing the filesystem, we
1238 * have three distinct cases:
1239 *
1240 * - ignore it
1241 * - see it as a directory
1242 * - recurse into it
1243 *
1244 * and which one we choose depends on a combination of existing
1245 * git index contents and the flags passed into the directory
1246 * traversal routine.
1247 *
1248 * Case 1: If we *already* have entries in the index under that
5bd8e2d8
KB
1249 * directory name, we always recurse into the directory to see
1250 * all the files.
09595258
LT
1251 *
1252 * Case 2: If we *already* have that directory name as a gitlink,
1253 * we always continue to see it as a gitlink, regardless of whether
1254 * there is an actual git directory there or not (it might not
1255 * be checked out as a subproject!)
1256 *
1257 * Case 3: if we didn't have it in the index previously, we
1258 * have a few sub-cases:
1259 *
1260 * (a) if "show_other_directories" is true, we show it as
1261 * just a directory, unless "hide_empty_directories" is
defd7c7b
KB
1262 * also true, in which case we need to check if it contains any
1263 * untracked and / or ignored files.
09595258 1264 * (b) if it looks like a git directory, and we don't have
302b9282 1265 * 'no_gitlinks' set we treat it as a gitlink, and show it
09595258
LT
1266 * as a directory.
1267 * (c) otherwise, we recurse into it.
1268 */
defd7c7b 1269static enum path_treatment treat_directory(struct dir_struct *dir,
0dcb8d7f 1270 struct untracked_cache_dir *untracked,
2e5910f2 1271 const char *dirname, int len, int baselen, int exclude,
09595258
LT
1272 const struct path_simplify *simplify)
1273{
1274 /* The "len-1" is to strip the final '/' */
1275 switch (directory_exists_in_index(dirname, len-1)) {
1276 case index_directory:
defd7c7b 1277 return path_recurse;
09595258
LT
1278
1279 case index_gitdir:
26c986e1 1280 return path_none;
09595258
LT
1281
1282 case index_nonexistent:
7c4c97c0 1283 if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
09595258 1284 break;
7c4c97c0 1285 if (!(dir->flags & DIR_NO_GITLINKS)) {
09595258
LT
1286 unsigned char sha1[20];
1287 if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
defd7c7b 1288 return path_untracked;
09595258 1289 }
defd7c7b 1290 return path_recurse;
09595258
LT
1291 }
1292
1293 /* This is the "show_other_directories" case */
721ac4ed 1294
184d2a8e 1295 if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
defd7c7b
KB
1296 return exclude ? path_excluded : path_untracked;
1297
2e5910f2
DT
1298 untracked = lookup_untracked(dir->untracked, untracked,
1299 dirname + baselen, len - baselen);
0dcb8d7f
NTND
1300 return read_directory_recursive(dir, dirname, len,
1301 untracked, 1, simplify);
453ec4bd
LT
1302}
1303
9fc42d60
LT
1304/*
1305 * This is an inexact early pruning of any recursive directory
1306 * reading - if the path cannot possibly be in the pathspec,
1307 * return true, and we'll skip it early.
1308 */
1309static int simplify_away(const char *path, int pathlen, const struct path_simplify *simplify)
1310{
1311 if (simplify) {
1312 for (;;) {
1313 const char *match = simplify->path;
1314 int len = simplify->len;
1315
1316 if (!match)
1317 break;
1318 if (len > pathlen)
1319 len = pathlen;
1320 if (!memcmp(path, match, len))
1321 return 0;
1322 simplify++;
1323 }
1324 return 1;
1325 }
1326 return 0;
1327}
1328
29209cbe
JK
1329/*
1330 * This function tells us whether an excluded path matches a
1331 * list of "interesting" pathspecs. That is, whether a path matched
1332 * by any of the pathspecs could possibly be ignored by excluding
1333 * the specified path. This can happen if:
1334 *
1335 * 1. the path is mentioned explicitly in the pathspec
1336 *
1337 * 2. the path is a directory prefix of some element in the
1338 * pathspec
1339 */
1340static int exclude_matches_pathspec(const char *path, int len,
1341 const struct path_simplify *simplify)
e96980ef
JK
1342{
1343 if (simplify) {
1344 for (; simplify->path; simplify++) {
1345 if (len == simplify->len
1346 && !memcmp(path, simplify->path, len))
1347 return 1;
29209cbe
JK
1348 if (len < simplify->len
1349 && simplify->path[len] == '/'
1350 && !memcmp(path, simplify->path, len))
1351 return 1;
e96980ef
JK
1352 }
1353 }
1354 return 0;
1355}
1356
443e061a
LT
1357static int get_index_dtype(const char *path, int len)
1358{
1359 int pos;
9c5e6c80 1360 const struct cache_entry *ce;
443e061a 1361
ebbd7439 1362 ce = cache_file_exists(path, len, 0);
443e061a
LT
1363 if (ce) {
1364 if (!ce_uptodate(ce))
1365 return DT_UNKNOWN;
1366 if (S_ISGITLINK(ce->ce_mode))
1367 return DT_DIR;
1368 /*
1369 * Nobody actually cares about the
1370 * difference between DT_LNK and DT_REG
1371 */
1372 return DT_REG;
1373 }
1374
1375 /* Try to look it up as a directory */
1376 pos = cache_name_pos(path, len);
1377 if (pos >= 0)
1378 return DT_UNKNOWN;
1379 pos = -pos-1;
1380 while (pos < active_nr) {
1381 ce = active_cache[pos++];
1382 if (strncmp(ce->name, path, len))
1383 break;
1384 if (ce->name[len] > '/')
1385 break;
1386 if (ce->name[len] < '/')
1387 continue;
1388 if (!ce_uptodate(ce))
1389 break; /* continue? */
1390 return DT_DIR;
1391 }
1392 return DT_UNKNOWN;
1393}
1394
caa6b782 1395static int get_dtype(struct dirent *de, const char *path, int len)
07134421 1396{
6831a88a 1397 int dtype = de ? DTYPE(de) : DT_UNKNOWN;
07134421
LT
1398 struct stat st;
1399
1400 if (dtype != DT_UNKNOWN)
1401 return dtype;
443e061a
LT
1402 dtype = get_index_dtype(path, len);
1403 if (dtype != DT_UNKNOWN)
1404 return dtype;
1405 if (lstat(path, &st))
07134421
LT
1406 return dtype;
1407 if (S_ISREG(st.st_mode))
1408 return DT_REG;
1409 if (S_ISDIR(st.st_mode))
1410 return DT_DIR;
1411 if (S_ISLNK(st.st_mode))
1412 return DT_LNK;
1413 return dtype;
1414}
1415
16e2cfa9 1416static enum path_treatment treat_one_path(struct dir_struct *dir,
0dcb8d7f 1417 struct untracked_cache_dir *untracked,
49dc2cc2 1418 struct strbuf *path,
2e5910f2 1419 int baselen,
16e2cfa9
JH
1420 const struct path_simplify *simplify,
1421 int dtype, struct dirent *de)
53cc5356 1422{
8aaf8d77 1423 int exclude;
ebbd7439 1424 int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);
2eac2a4c 1425
8aaf8d77
KB
1426 if (dtype == DT_UNKNOWN)
1427 dtype = get_dtype(de, path->buf, path->len);
1428
1429 /* Always exclude indexed files */
2eac2a4c 1430 if (dtype != DT_DIR && has_path_in_index)
defd7c7b 1431 return path_none;
8aaf8d77 1432
2eac2a4c
JH
1433 /*
1434 * When we are looking at a directory P in the working tree,
1435 * there are three cases:
1436 *
1437 * (1) P exists in the index. Everything inside the directory P in
1438 * the working tree needs to go when P is checked out from the
1439 * index.
1440 *
1441 * (2) P does not exist in the index, but there is P/Q in the index.
1442 * We know P will stay a directory when we check out the contents
1443 * of the index, but we do not know yet if there is a directory
1444 * P/Q in the working tree to be killed, so we need to recurse.
1445 *
1446 * (3) P does not exist in the index, and there is no P/Q in the index
1447 * to require P to be a directory, either. Only in this case, we
1448 * know that everything inside P will not be killed without
1449 * recursing.
1450 */
1451 if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
1452 (dtype == DT_DIR) &&
de372b1b
ES
1453 !has_path_in_index &&
1454 (directory_exists_in_index(path->buf, path->len) == index_nonexistent))
1455 return path_none;
8aaf8d77
KB
1456
1457 exclude = is_excluded(dir, path->buf, &dtype);
53cc5356
JH
1458
1459 /*
1460 * Excluded? If we don't explicitly want to show
1461 * ignored files, ignore it
1462 */
0aaf62b6 1463 if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
defd7c7b 1464 return path_excluded;
53cc5356 1465
53cc5356
JH
1466 switch (dtype) {
1467 default:
defd7c7b 1468 return path_none;
53cc5356 1469 case DT_DIR:
49dc2cc2 1470 strbuf_addch(path, '/');
2e5910f2
DT
1471 return treat_directory(dir, untracked, path->buf, path->len,
1472 baselen, exclude, simplify);
53cc5356
JH
1473 case DT_REG:
1474 case DT_LNK:
defd7c7b 1475 return exclude ? path_excluded : path_untracked;
53cc5356 1476 }
53cc5356
JH
1477}
1478
91a2288b
NTND
1479static enum path_treatment treat_path_fast(struct dir_struct *dir,
1480 struct untracked_cache_dir *untracked,
1481 struct cached_dir *cdir,
1482 struct strbuf *path,
1483 int baselen,
1484 const struct path_simplify *simplify)
1485{
1486 strbuf_setlen(path, baselen);
1487 if (!cdir->ucd) {
1488 strbuf_addstr(path, cdir->file);
1489 return path_untracked;
1490 }
1491 strbuf_addstr(path, cdir->ucd->name);
1492 /* treat_one_path() does this before it calls treat_directory() */
00b6c178 1493 strbuf_complete(path, '/');
91a2288b
NTND
1494 if (cdir->ucd->check_only)
1495 /*
1496 * check_only is set as a result of treat_directory() getting
1497 * to its bottom. Verify again the same set of directories
1498 * with check_only set.
1499 */
1500 return read_directory_recursive(dir, path->buf, path->len,
1501 cdir->ucd, 1, simplify);
1502 /*
1503 * We get path_recurse in the first run when
1504 * directory_exists_in_index() returns index_nonexistent. We
1505 * are sure that new changes in the index does not impact the
1506 * outcome. Return now.
1507 */
1508 return path_recurse;
1509}
1510
16e2cfa9 1511static enum path_treatment treat_path(struct dir_struct *dir,
0dcb8d7f 1512 struct untracked_cache_dir *untracked,
cf7c6148 1513 struct cached_dir *cdir,
49dc2cc2 1514 struct strbuf *path,
16e2cfa9 1515 int baselen,
49dc2cc2 1516 const struct path_simplify *simplify)
16e2cfa9
JH
1517{
1518 int dtype;
cf7c6148 1519 struct dirent *de = cdir->de;
16e2cfa9 1520
91a2288b
NTND
1521 if (!de)
1522 return treat_path_fast(dir, untracked, cdir, path,
1523 baselen, simplify);
16e2cfa9 1524 if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
defd7c7b 1525 return path_none;
49dc2cc2
RS
1526 strbuf_setlen(path, baselen);
1527 strbuf_addstr(path, de->d_name);
1528 if (simplify_away(path->buf, path->len, simplify))
defd7c7b 1529 return path_none;
16e2cfa9
JH
1530
1531 dtype = DTYPE(de);
2e5910f2 1532 return treat_one_path(dir, untracked, path, baselen, simplify, dtype, de);
0dcb8d7f
NTND
1533}
1534
1535static void add_untracked(struct untracked_cache_dir *dir, const char *name)
1536{
1537 if (!dir)
1538 return;
1539 ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
1540 dir->untracked_alloc);
1541 dir->untracked[dir->untracked_nr++] = xstrdup(name);
16e2cfa9
JH
1542}
1543
91a2288b
NTND
1544static int valid_cached_dir(struct dir_struct *dir,
1545 struct untracked_cache_dir *untracked,
1546 struct strbuf *path,
1547 int check_only)
1548{
1549 struct stat st;
1550
1551 if (!untracked)
1552 return 0;
1553
1554 if (stat(path->len ? path->buf : ".", &st)) {
1555 invalidate_directory(dir->untracked, untracked);
1556 memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
1557 return 0;
1558 }
1559 if (!untracked->valid ||
ed4efab1 1560 match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {
91a2288b
NTND
1561 if (untracked->valid)
1562 invalidate_directory(dir->untracked, untracked);
1563 fill_stat_data(&untracked->stat_data, &st);
1564 return 0;
1565 }
1566
1567 if (untracked->check_only != !!check_only) {
1568 invalidate_directory(dir->untracked, untracked);
1569 return 0;
1570 }
1571
1572 /*
1573 * prep_exclude will be called eventually on this directory,
1574 * but it's called much later in last_exclude_matching(). We
1575 * need it now to determine the validity of the cache for this
1576 * path. The next calls will be nearly no-op, the way
1577 * prep_exclude() is designed.
1578 */
1579 if (path->len && path->buf[path->len - 1] != '/') {
1580 strbuf_addch(path, '/');
1581 prep_exclude(dir, path->buf, path->len);
1582 strbuf_setlen(path, path->len - 1);
1583 } else
1584 prep_exclude(dir, path->buf, path->len);
1585
1586 /* hopefully prep_exclude() haven't invalidated this entry... */
1587 return untracked->valid;
1588}
1589
cf7c6148
NTND
1590static int open_cached_dir(struct cached_dir *cdir,
1591 struct dir_struct *dir,
1592 struct untracked_cache_dir *untracked,
1593 struct strbuf *path,
1594 int check_only)
1595{
1596 memset(cdir, 0, sizeof(*cdir));
1597 cdir->untracked = untracked;
91a2288b
NTND
1598 if (valid_cached_dir(dir, untracked, path, check_only))
1599 return 0;
cf7c6148 1600 cdir->fdir = opendir(path->len ? path->buf : ".");
91a2288b
NTND
1601 if (dir->untracked)
1602 dir->untracked->dir_opened++;
cf7c6148
NTND
1603 if (!cdir->fdir)
1604 return -1;
1605 return 0;
1606}
1607
1608static int read_cached_dir(struct cached_dir *cdir)
1609{
1610 if (cdir->fdir) {
1611 cdir->de = readdir(cdir->fdir);
1612 if (!cdir->de)
1613 return -1;
1614 return 0;
1615 }
91a2288b
NTND
1616 while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
1617 struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
26cb0182
NTND
1618 if (!d->recurse) {
1619 cdir->nr_dirs++;
1620 continue;
1621 }
91a2288b
NTND
1622 cdir->ucd = d;
1623 cdir->nr_dirs++;
1624 return 0;
1625 }
1626 cdir->ucd = NULL;
1627 if (cdir->nr_files < cdir->untracked->untracked_nr) {
1628 struct untracked_cache_dir *d = cdir->untracked;
1629 cdir->file = d->untracked[cdir->nr_files++];
1630 return 0;
1631 }
cf7c6148
NTND
1632 return -1;
1633}
1634
1635static void close_cached_dir(struct cached_dir *cdir)
1636{
1637 if (cdir->fdir)
1638 closedir(cdir->fdir);
91a2288b
NTND
1639 /*
1640 * We have gone through this directory and found no untracked
1641 * entries. Mark it valid.
1642 */
26cb0182 1643 if (cdir->untracked) {
91a2288b 1644 cdir->untracked->valid = 1;
26cb0182
NTND
1645 cdir->untracked->recurse = 1;
1646 }
16e2cfa9
JH
1647}
1648
453ec4bd
LT
1649/*
1650 * Read a directory tree. We currently ignore anything but
1651 * directories, regular files and symlinks. That's because git
1652 * doesn't handle them at all yet. Maybe that will change some
1653 * day.
1654 *
1655 * Also, we ignore the name ".git" (even if it is not a directory).
1656 * That likely will not change.
defd7c7b
KB
1657 *
1658 * Returns the most significant path_treatment value encountered in the scan.
453ec4bd 1659 */
defd7c7b 1660static enum path_treatment read_directory_recursive(struct dir_struct *dir,
53cc5356 1661 const char *base, int baselen,
0dcb8d7f 1662 struct untracked_cache_dir *untracked, int check_only,
53cc5356 1663 const struct path_simplify *simplify)
453ec4bd 1664{
cf7c6148 1665 struct cached_dir cdir;
defd7c7b 1666 enum path_treatment state, subdir_state, dir_state = path_none;
bef36921 1667 struct strbuf path = STRBUF_INIT;
453ec4bd 1668
bef36921 1669 strbuf_add(&path, base, baselen);
02cb6753 1670
cf7c6148 1671 if (open_cached_dir(&cdir, dir, untracked, &path, check_only))
1528d247
RS
1672 goto out;
1673
0dcb8d7f
NTND
1674 if (untracked)
1675 untracked->check_only = !!check_only;
1676
cf7c6148 1677 while (!read_cached_dir(&cdir)) {
defd7c7b 1678 /* check how the file or directory should be treated */
cf7c6148 1679 state = treat_path(dir, untracked, &cdir, &path, baselen, simplify);
0dcb8d7f 1680
defd7c7b
KB
1681 if (state > dir_state)
1682 dir_state = state;
1683
1684 /* recurse into subdir if instructed by treat_path */
1685 if (state == path_recurse) {
0dcb8d7f
NTND
1686 struct untracked_cache_dir *ud;
1687 ud = lookup_untracked(dir->untracked, untracked,
1688 path.buf + baselen,
1689 path.len - baselen);
1690 subdir_state =
1691 read_directory_recursive(dir, path.buf, path.len,
1692 ud, check_only, simplify);
defd7c7b
KB
1693 if (subdir_state > dir_state)
1694 dir_state = subdir_state;
1695 }
1696
1697 if (check_only) {
1698 /* abort early if maximum state has been reached */
0dcb8d7f 1699 if (dir_state == path_untracked) {
91a2288b 1700 if (cdir.fdir)
0dcb8d7f 1701 add_untracked(untracked, path.buf + baselen);
defd7c7b 1702 break;
0dcb8d7f 1703 }
defd7c7b 1704 /* skip the dir_add_* part */
02cb6753 1705 continue;
453ec4bd 1706 }
defd7c7b
KB
1707
1708 /* add the path to the appropriate result list */
1709 switch (state) {
1710 case path_excluded:
1711 if (dir->flags & DIR_SHOW_IGNORED)
1712 dir_add_name(dir, path.buf, path.len);
0aaf62b6
KB
1713 else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
1714 ((dir->flags & DIR_COLLECT_IGNORED) &&
1715 exclude_matches_pathspec(path.buf, path.len,
1716 simplify)))
1717 dir_add_ignored(dir, path.buf, path.len);
defd7c7b
KB
1718 break;
1719
1720 case path_untracked:
0dcb8d7f
NTND
1721 if (dir->flags & DIR_SHOW_IGNORED)
1722 break;
1723 dir_add_name(dir, path.buf, path.len);
91a2288b 1724 if (cdir.fdir)
0dcb8d7f 1725 add_untracked(untracked, path.buf + baselen);
1528d247 1726 break;
defd7c7b
KB
1727
1728 default:
1729 break;
1730 }
453ec4bd 1731 }
cf7c6148 1732 close_cached_dir(&cdir);
1528d247 1733 out:
bef36921 1734 strbuf_release(&path);
453ec4bd 1735
defd7c7b 1736 return dir_state;
453ec4bd
LT
1737}
1738
1739static int cmp_name(const void *p1, const void *p2)
1740{
1741 const struct dir_entry *e1 = *(const struct dir_entry **)p1;
1742 const struct dir_entry *e2 = *(const struct dir_entry **)p2;
1743
ccdd4a0f 1744 return name_compare(e1->name, e1->len, e2->name, e2->len);
453ec4bd
LT
1745}
1746
9fc42d60
LT
1747static struct path_simplify *create_simplify(const char **pathspec)
1748{
1749 int nr, alloc = 0;
1750 struct path_simplify *simplify = NULL;
1751
1752 if (!pathspec)
1753 return NULL;
1754
1755 for (nr = 0 ; ; nr++) {
1756 const char *match;
9af49f82 1757 ALLOC_GROW(simplify, nr + 1, alloc);
9fc42d60
LT
1758 match = *pathspec++;
1759 if (!match)
1760 break;
1761 simplify[nr].path = match;
1762 simplify[nr].len = simple_length(match);
1763 }
1764 simplify[nr].path = NULL;
1765 simplify[nr].len = 0;
1766 return simplify;
1767}
1768
1769static void free_simplify(struct path_simplify *simplify)
1770{
8e0f7003 1771 free(simplify);
9fc42d60
LT
1772}
1773
48ffef96
JH
1774static int treat_leading_path(struct dir_struct *dir,
1775 const char *path, int len,
1776 const struct path_simplify *simplify)
1777{
49dc2cc2
RS
1778 struct strbuf sb = STRBUF_INIT;
1779 int baselen, rc = 0;
48ffef96 1780 const char *cp;
be8a84c5 1781 int old_flags = dir->flags;
48ffef96
JH
1782
1783 while (len && path[len - 1] == '/')
1784 len--;
1785 if (!len)
1786 return 1;
1787 baselen = 0;
be8a84c5 1788 dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
48ffef96
JH
1789 while (1) {
1790 cp = path + baselen + !!baselen;
1791 cp = memchr(cp, '/', path + len - cp);
1792 if (!cp)
1793 baselen = len;
1794 else
1795 baselen = cp - path;
49dc2cc2
RS
1796 strbuf_setlen(&sb, 0);
1797 strbuf_add(&sb, path, baselen);
1798 if (!is_directory(sb.buf))
1799 break;
1800 if (simplify_away(sb.buf, sb.len, simplify))
1801 break;
2e5910f2 1802 if (treat_one_path(dir, NULL, &sb, baselen, simplify,
defd7c7b 1803 DT_DIR, NULL) == path_none)
49dc2cc2
RS
1804 break; /* do not recurse into it */
1805 if (len <= baselen) {
1806 rc = 1;
1807 break; /* finished checking */
1808 }
48ffef96 1809 }
49dc2cc2 1810 strbuf_release(&sb);
be8a84c5 1811 dir->flags = old_flags;
49dc2cc2 1812 return rc;
48ffef96
JH
1813}
1814
1e8fef60
NTND
1815static const char *get_ident_string(void)
1816{
1817 static struct strbuf sb = STRBUF_INIT;
1818 struct utsname uts;
1819
1820 if (sb.len)
1821 return sb.buf;
100e4337 1822 if (uname(&uts) < 0)
1e8fef60 1823 die_errno(_("failed to get kernel name and information"));
0e0f7618
CC
1824 strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
1825 uts.sysname);
1e8fef60
NTND
1826 return sb.buf;
1827}
1828
1829static int ident_in_untracked(const struct untracked_cache *uc)
1830{
0e0f7618
CC
1831 /*
1832 * Previous git versions may have saved many NUL separated
1833 * strings in the "ident" field, but it is insane to manage
1834 * many locations, so just take care of the first one.
1835 */
1e8fef60 1836
0e0f7618 1837 return !strcmp(uc->ident.buf, get_ident_string());
1e8fef60
NTND
1838}
1839
0e0f7618 1840static void set_untracked_ident(struct untracked_cache *uc)
1e8fef60 1841{
0e0f7618 1842 strbuf_reset(&uc->ident);
1e8fef60 1843 strbuf_addstr(&uc->ident, get_ident_string());
0e0f7618
CC
1844
1845 /*
1846 * This strbuf used to contain a list of NUL separated
1847 * strings, so save NUL too for backward compatibility.
1848 */
1e8fef60
NTND
1849 strbuf_addch(&uc->ident, 0);
1850}
1851
4a4ca479
CC
1852static void new_untracked_cache(struct index_state *istate)
1853{
1854 struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
1855 strbuf_init(&uc->ident, 100);
1856 uc->exclude_per_dir = ".gitignore";
1857 /* should be the same flags used by git-status */
1858 uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
0e0f7618 1859 set_untracked_ident(uc);
4a4ca479 1860 istate->untracked = uc;
0e0f7618 1861 istate->cache_changed |= UNTRACKED_CHANGED;
4a4ca479
CC
1862}
1863
1864void add_untracked_cache(struct index_state *istate)
1865{
1866 if (!istate->untracked) {
1867 new_untracked_cache(istate);
0e0f7618
CC
1868 } else {
1869 if (!ident_in_untracked(istate->untracked)) {
1870 free_untracked_cache(istate->untracked);
1871 new_untracked_cache(istate);
1872 }
1873 }
4a4ca479
CC
1874}
1875
07b29bfd
CC
1876void remove_untracked_cache(struct index_state *istate)
1877{
1878 if (istate->untracked) {
1879 free_untracked_cache(istate->untracked);
1880 istate->untracked = NULL;
1881 istate->cache_changed |= UNTRACKED_CHANGED;
1882 }
1883}
1884
ccad261f
NTND
1885static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
1886 int base_len,
1887 const struct pathspec *pathspec)
1888{
1889 struct untracked_cache_dir *root;
1890
76e6b090 1891 if (!dir->untracked || getenv("GIT_DISABLE_UNTRACKED_CACHE"))
ccad261f
NTND
1892 return NULL;
1893
1894 /*
1895 * We only support $GIT_DIR/info/exclude and core.excludesfile
1896 * as the global ignore rule files. Any other additions
1897 * (e.g. from command line) invalidate the cache. This
1898 * condition also catches running setup_standard_excludes()
1899 * before setting dir->untracked!
1900 */
1901 if (dir->unmanaged_exclude_files)
1902 return NULL;
1903
1904 /*
1905 * Optimize for the main use case only: whole-tree git
1906 * status. More work involved in treat_leading_path() if we
1907 * use cache on just a subset of the worktree. pathspec
1908 * support could make the matter even worse.
1909 */
1910 if (base_len || (pathspec && pathspec->nr))
1911 return NULL;
1912
1913 /* Different set of flags may produce different results */
1914 if (dir->flags != dir->untracked->dir_flags ||
1915 /*
1916 * See treat_directory(), case index_nonexistent. Without
1917 * this flag, we may need to also cache .git file content
1918 * for the resolve_gitlink_ref() call, which we don't.
1919 */
1920 !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
1921 /* We don't support collecting ignore files */
1922 (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
1923 DIR_COLLECT_IGNORED)))
1924 return NULL;
1925
1926 /*
1927 * If we use .gitignore in the cache and now you change it to
1928 * .gitexclude, everything will go wrong.
1929 */
1930 if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
1931 strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
1932 return NULL;
1933
1934 /*
1935 * EXC_CMDL is not considered in the cache. If people set it,
1936 * skip the cache.
1937 */
1938 if (dir->exclude_list_group[EXC_CMDL].nr)
1939 return NULL;
1940
1e8fef60 1941 if (!ident_in_untracked(dir->untracked)) {
0e0f7618 1942 warning(_("Untracked cache is disabled on this system or location."));
1e8fef60
NTND
1943 return NULL;
1944 }
1945
ccad261f
NTND
1946 if (!dir->untracked->root) {
1947 const int len = sizeof(*dir->untracked->root);
1948 dir->untracked->root = xmalloc(len);
1949 memset(dir->untracked->root, 0, len);
1950 }
1951
1952 /* Validate $GIT_DIR/info/exclude and core.excludesfile */
1953 root = dir->untracked->root;
1954 if (hashcmp(dir->ss_info_exclude.sha1,
1955 dir->untracked->ss_info_exclude.sha1)) {
1956 invalidate_gitignore(dir->untracked, root);
1957 dir->untracked->ss_info_exclude = dir->ss_info_exclude;
1958 }
1959 if (hashcmp(dir->ss_excludes_file.sha1,
1960 dir->untracked->ss_excludes_file.sha1)) {
1961 invalidate_gitignore(dir->untracked, root);
1962 dir->untracked->ss_excludes_file = dir->ss_excludes_file;
1963 }
26cb0182
NTND
1964
1965 /* Make sure this directory is not dropped out at saving phase */
1966 root->recurse = 1;
ccad261f
NTND
1967 return root;
1968}
1969
7327d3d1 1970int read_directory(struct dir_struct *dir, const char *path, int len, const struct pathspec *pathspec)
9fc42d60 1971{
725b0605 1972 struct path_simplify *simplify;
ccad261f 1973 struct untracked_cache_dir *untracked;
b4189aa8 1974
7327d3d1
NTND
1975 /*
1976 * Check out create_simplify()
1977 */
1978 if (pathspec)
5c6933d2
NTND
1979 GUARD_PATHSPEC(pathspec,
1980 PATHSPEC_FROMTOP |
1981 PATHSPEC_MAXDEPTH |
bd30c2e4 1982 PATHSPEC_LITERAL |
93d93537 1983 PATHSPEC_GLOB |
ef79b1f8
NTND
1984 PATHSPEC_ICASE |
1985 PATHSPEC_EXCLUDE);
7327d3d1 1986
dba2e203 1987 if (has_symlink_leading_path(path, len))
725b0605
JH
1988 return dir->nr;
1989
ef79b1f8
NTND
1990 /*
1991 * exclude patterns are treated like positive ones in
1992 * create_simplify. Usually exclude patterns should be a
1993 * subset of positive ones, which has no impacts on
1994 * create_simplify().
1995 */
b3920bbd 1996 simplify = create_simplify(pathspec ? pathspec->_raw : NULL);
ccad261f
NTND
1997 untracked = validate_untracked_cache(dir, len, pathspec);
1998 if (!untracked)
1999 /*
2000 * make sure untracked cache code path is disabled,
2001 * e.g. prep_exclude()
2002 */
2003 dir->untracked = NULL;
48ffef96 2004 if (!len || treat_leading_path(dir, path, len, simplify))
ccad261f 2005 read_directory_recursive(dir, path, len, untracked, 0, simplify);
9fc42d60 2006 free_simplify(simplify);
453ec4bd 2007 qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);
2abd31b0 2008 qsort(dir->ignored, dir->ignored_nr, sizeof(struct dir_entry *), cmp_name);
c9ccb5d3
NTND
2009 if (dir->untracked) {
2010 static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
2011 trace_printf_key(&trace_untracked_stats,
2012 "node creation: %u\n"
2013 "gitignore invalidation: %u\n"
2014 "directory invalidation: %u\n"
2015 "opendir: %u\n",
2016 dir->untracked->dir_created,
2017 dir->untracked->gitignore_invalidated,
2018 dir->untracked->dir_invalidated,
2019 dir->untracked->dir_opened);
1bbb3dba
NTND
2020 if (dir->untracked == the_index.untracked &&
2021 (dir->untracked->dir_opened ||
2022 dir->untracked->gitignore_invalidated ||
2023 dir->untracked->dir_invalidated))
2024 the_index.cache_changed |= UNTRACKED_CHANGED;
2025 if (dir->untracked != the_index.untracked) {
2026 free(dir->untracked);
2027 dir->untracked = NULL;
2028 }
c9ccb5d3 2029 }
453ec4bd
LT
2030 return dir->nr;
2031}
c91f0d92 2032
686a4a06 2033int file_exists(const char *f)
c91f0d92 2034{
686a4a06 2035 struct stat sb;
a50f9fc5 2036 return lstat(f, &sb) == 0;
c91f0d92 2037}
e6636747 2038
63ec5e1f
JS
2039static int cmp_icase(char a, char b)
2040{
2041 if (a == b)
2042 return 0;
2043 if (ignore_case)
2044 return toupper(a) - toupper(b);
2045 return a - b;
2046}
2047
e6636747 2048/*
9b125da4
NTND
2049 * Given two normalized paths (a trailing slash is ok), if subdir is
2050 * outside dir, return -1. Otherwise return the offset in subdir that
2051 * can be used as relative path to dir.
e6636747 2052 */
9b125da4 2053int dir_inside_of(const char *subdir, const char *dir)
e6636747 2054{
9b125da4 2055 int offset = 0;
e6636747 2056
9b125da4 2057 assert(dir && subdir && *dir && *subdir);
e6636747 2058
63ec5e1f 2059 while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
e6636747 2060 dir++;
9b125da4
NTND
2061 subdir++;
2062 offset++;
490544b1 2063 }
9b125da4
NTND
2064
2065 /* hel[p]/me vs hel[l]/yeah */
2066 if (*dir && *subdir)
2067 return -1;
2068
2069 if (!*subdir)
2070 return !*dir ? offset : -1; /* same dir */
2071
2072 /* foo/[b]ar vs foo/[] */
2073 if (is_dir_sep(dir[-1]))
2074 return is_dir_sep(subdir[-1]) ? offset : -1;
2075
2076 /* foo[/]bar vs foo[] */
2077 return is_dir_sep(*subdir) ? offset + 1 : -1;
e6636747
JS
2078}
2079
2080int is_inside_dir(const char *dir)
2081{
56b9f6e7
RS
2082 char *cwd;
2083 int rc;
2084
b892913d
NTND
2085 if (!dir)
2086 return 0;
56b9f6e7
RS
2087
2088 cwd = xgetcwd();
2089 rc = (dir_inside_of(cwd, dir) >= 0);
2090 free(cwd);
2091 return rc;
e6636747 2092}
7155b727 2093
55892d23
AP
2094int is_empty_dir(const char *path)
2095{
2096 DIR *dir = opendir(path);
2097 struct dirent *e;
2098 int ret = 1;
2099
2100 if (!dir)
2101 return 0;
2102
2103 while ((e = readdir(dir)) != NULL)
2104 if (!is_dot_or_dotdot(e->d_name)) {
2105 ret = 0;
2106 break;
2107 }
2108
2109 closedir(dir);
2110 return ret;
2111}
2112
ae2f203e 2113static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
7155b727 2114{
a0f4afbe 2115 DIR *dir;
7155b727 2116 struct dirent *e;
ae2f203e 2117 int ret = 0, original_len = path->len, len, kept_down = 0;
a0f4afbe 2118 int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
c844a803 2119 int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
a0f4afbe 2120 unsigned char submodule_head[20];
7155b727 2121
a0f4afbe 2122 if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
ae2f203e 2123 !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
a0f4afbe 2124 /* Do not descend and nuke a nested git work tree. */
ae2f203e
JH
2125 if (kept_up)
2126 *kept_up = 1;
a0f4afbe 2127 return 0;
ae2f203e 2128 }
a0f4afbe 2129
ae2f203e 2130 flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
a0f4afbe 2131 dir = opendir(path->buf);
c844a803 2132 if (!dir) {
863808cd
MH
2133 if (errno == ENOENT)
2134 return keep_toplevel ? -1 : 0;
2135 else if (errno == EACCES && !keep_toplevel)
ecb2c282
MH
2136 /*
2137 * An empty dir could be removable even if it
2138 * is unreadable:
2139 */
c844a803
JH
2140 return rmdir(path->buf);
2141 else
2142 return -1;
2143 }
00b6c178 2144 strbuf_complete(path, '/');
7155b727
JS
2145
2146 len = path->len;
2147 while ((e = readdir(dir)) != NULL) {
2148 struct stat st;
8ca12c0d
AP
2149 if (is_dot_or_dotdot(e->d_name))
2150 continue;
7155b727
JS
2151
2152 strbuf_setlen(path, len);
2153 strbuf_addstr(path, e->d_name);
863808cd
MH
2154 if (lstat(path->buf, &st)) {
2155 if (errno == ENOENT)
2156 /*
2157 * file disappeared, which is what we
2158 * wanted anyway
2159 */
2160 continue;
2161 /* fall thru */
2162 } else if (S_ISDIR(st.st_mode)) {
ae2f203e 2163 if (!remove_dir_recurse(path, flag, &kept_down))
7155b727 2164 continue; /* happy */
863808cd
MH
2165 } else if (!only_empty &&
2166 (!unlink(path->buf) || errno == ENOENT)) {
7155b727 2167 continue; /* happy, too */
863808cd 2168 }
7155b727
JS
2169
2170 /* path too long, stat fails, or non-directory still exists */
2171 ret = -1;
2172 break;
2173 }
2174 closedir(dir);
2175
2176 strbuf_setlen(path, original_len);
ae2f203e 2177 if (!ret && !keep_toplevel && !kept_down)
863808cd 2178 ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
ae2f203e
JH
2179 else if (kept_up)
2180 /*
2181 * report the uplevel that it is not an error that we
2182 * did not rmdir() our directory.
2183 */
2184 *kept_up = !ret;
7155b727
JS
2185 return ret;
2186}
039bc64e 2187
ae2f203e
JH
2188int remove_dir_recursively(struct strbuf *path, int flag)
2189{
2190 return remove_dir_recurse(path, flag, NULL);
2191}
2192
f932729c
JK
2193static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
2194
039bc64e
JH
2195void setup_standard_excludes(struct dir_struct *dir)
2196{
2197 const char *path;
2198
2199 dir->exclude_per_dir = ".gitignore";
099d2d86
JH
2200
2201 /* core.excludefile defaulting to $XDG_HOME/git/ignore */
2845ce7f
PT
2202 if (!excludes_file)
2203 excludes_file = xdg_config_home("ignore");
4698c8fe 2204 if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
38ccaf93
JH
2205 add_excludes_from_file_1(dir, excludes_file,
2206 dir->untracked ? &dir->ss_excludes_file : NULL);
099d2d86
JH
2207
2208 /* per repository user preference */
f932729c 2209 path = git_path_info_exclude();
099d2d86 2210 if (!access_or_warn(path, R_OK, 0))
0dcb8d7f
NTND
2211 add_excludes_from_file_1(dir, path,
2212 dir->untracked ? &dir->ss_info_exclude : NULL);
039bc64e 2213}
4a92d1bf
AR
2214
2215int remove_path(const char *name)
2216{
2217 char *slash;
2218
9a6728d4 2219 if (unlink(name) && errno != ENOENT && errno != ENOTDIR)
4a92d1bf
AR
2220 return -1;
2221
2222 slash = strrchr(name, '/');
2223 if (slash) {
2224 char *dirs = xstrdup(name);
2225 slash = dirs + (slash - name);
2226 do {
2227 *slash = '\0';
3fc0d131 2228 } while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
4a92d1bf
AR
2229 free(dirs);
2230 }
2231 return 0;
2232}
2233
270be816
AS
2234/*
2235 * Frees memory within dir which was allocated for exclude lists and
2236 * the exclude_stack. Does not free dir itself.
2237 */
2238void clear_directory(struct dir_struct *dir)
2239{
2240 int i, j;
2241 struct exclude_list_group *group;
2242 struct exclude_list *el;
2243 struct exclude_stack *stk;
2244
2245 for (i = EXC_CMDL; i <= EXC_FILE; i++) {
2246 group = &dir->exclude_list_group[i];
2247 for (j = 0; j < group->nr; j++) {
2248 el = &group->el[j];
2249 if (i == EXC_DIRS)
2250 free((char *)el->src);
2251 clear_exclude_list(el);
2252 }
2253 free(group->el);
2254 }
2255
2256 stk = dir->exclude_stack;
2257 while (stk) {
2258 struct exclude_stack *prev = stk->prev;
2259 free(stk);
2260 stk = prev;
2261 }
aceb9429 2262 strbuf_release(&dir->basebuf);
270be816 2263}
83c094ad
NTND
2264
2265struct ondisk_untracked_cache {
2266 struct stat_data info_exclude_stat;
2267 struct stat_data excludes_file_stat;
2268 uint32_t dir_flags;
2269 unsigned char info_exclude_sha1[20];
2270 unsigned char excludes_file_sha1[20];
2271 char exclude_per_dir[FLEX_ARRAY];
2272};
2273
2274#define ouc_size(len) (offsetof(struct ondisk_untracked_cache, exclude_per_dir) + len + 1)
2275
2276struct write_data {
2277 int index; /* number of written untracked_cache_dir */
2278 struct ewah_bitmap *check_only; /* from untracked_cache_dir */
2279 struct ewah_bitmap *valid; /* from untracked_cache_dir */
2280 struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
2281 struct strbuf out;
2282 struct strbuf sb_stat;
2283 struct strbuf sb_sha1;
2284};
2285
2286static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
2287{
2288 to->sd_ctime.sec = htonl(from->sd_ctime.sec);
2289 to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
2290 to->sd_mtime.sec = htonl(from->sd_mtime.sec);
2291 to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
2292 to->sd_dev = htonl(from->sd_dev);
2293 to->sd_ino = htonl(from->sd_ino);
2294 to->sd_uid = htonl(from->sd_uid);
2295 to->sd_gid = htonl(from->sd_gid);
2296 to->sd_size = htonl(from->sd_size);
2297}
2298
2299static void write_one_dir(struct untracked_cache_dir *untracked,
2300 struct write_data *wd)
2301{
2302 struct stat_data stat_data;
2303 struct strbuf *out = &wd->out;
2304 unsigned char intbuf[16];
2305 unsigned int intlen, value;
2306 int i = wd->index++;
2307
2308 /*
2309 * untracked_nr should be reset whenever valid is clear, but
2310 * for safety..
2311 */
2312 if (!untracked->valid) {
2313 untracked->untracked_nr = 0;
2314 untracked->check_only = 0;
2315 }
2316
2317 if (untracked->check_only)
2318 ewah_set(wd->check_only, i);
2319 if (untracked->valid) {
2320 ewah_set(wd->valid, i);
2321 stat_data_to_disk(&stat_data, &untracked->stat_data);
2322 strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
2323 }
2324 if (!is_null_sha1(untracked->exclude_sha1)) {
2325 ewah_set(wd->sha1_valid, i);
2326 strbuf_add(&wd->sb_sha1, untracked->exclude_sha1, 20);
2327 }
2328
2329 intlen = encode_varint(untracked->untracked_nr, intbuf);
2330 strbuf_add(out, intbuf, intlen);
2331
2332 /* skip non-recurse directories */
2333 for (i = 0, value = 0; i < untracked->dirs_nr; i++)
2334 if (untracked->dirs[i]->recurse)
2335 value++;
2336 intlen = encode_varint(value, intbuf);
2337 strbuf_add(out, intbuf, intlen);
2338
2339 strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
2340
2341 for (i = 0; i < untracked->untracked_nr; i++)
2342 strbuf_add(out, untracked->untracked[i],
2343 strlen(untracked->untracked[i]) + 1);
2344
2345 for (i = 0; i < untracked->dirs_nr; i++)
2346 if (untracked->dirs[i]->recurse)
2347 write_one_dir(untracked->dirs[i], wd);
2348}
2349
2350void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
2351{
2352 struct ondisk_untracked_cache *ouc;
2353 struct write_data wd;
2354 unsigned char varbuf[16];
e0b83735
JK
2355 int varint_len;
2356 size_t len = strlen(untracked->exclude_per_dir);
2357
2358 FLEX_ALLOC_MEM(ouc, exclude_per_dir, untracked->exclude_per_dir, len);
83c094ad
NTND
2359 stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
2360 stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
2361 hashcpy(ouc->info_exclude_sha1, untracked->ss_info_exclude.sha1);
2362 hashcpy(ouc->excludes_file_sha1, untracked->ss_excludes_file.sha1);
2363 ouc->dir_flags = htonl(untracked->dir_flags);
1e8fef60
NTND
2364
2365 varint_len = encode_varint(untracked->ident.len, varbuf);
2366 strbuf_add(out, varbuf, varint_len);
8109984d 2367 strbuf_addbuf(out, &untracked->ident);
1e8fef60 2368
83c094ad
NTND
2369 strbuf_add(out, ouc, ouc_size(len));
2370 free(ouc);
2371 ouc = NULL;
2372
2373 if (!untracked->root) {
2374 varint_len = encode_varint(0, varbuf);
2375 strbuf_add(out, varbuf, varint_len);
2376 return;
2377 }
2378
2379 wd.index = 0;
2380 wd.check_only = ewah_new();
2381 wd.valid = ewah_new();
2382 wd.sha1_valid = ewah_new();
2383 strbuf_init(&wd.out, 1024);
2384 strbuf_init(&wd.sb_stat, 1024);
2385 strbuf_init(&wd.sb_sha1, 1024);
2386 write_one_dir(untracked->root, &wd);
2387
2388 varint_len = encode_varint(wd.index, varbuf);
2389 strbuf_add(out, varbuf, varint_len);
2390 strbuf_addbuf(out, &wd.out);
2391 ewah_serialize_strbuf(wd.valid, out);
2392 ewah_serialize_strbuf(wd.check_only, out);
2393 ewah_serialize_strbuf(wd.sha1_valid, out);
2394 strbuf_addbuf(out, &wd.sb_stat);
2395 strbuf_addbuf(out, &wd.sb_sha1);
2396 strbuf_addch(out, '\0'); /* safe guard for string lists */
2397
2398 ewah_free(wd.valid);
2399 ewah_free(wd.check_only);
2400 ewah_free(wd.sha1_valid);
2401 strbuf_release(&wd.out);
2402 strbuf_release(&wd.sb_stat);
2403 strbuf_release(&wd.sb_sha1);
2404}
f9e6c649
NTND
2405
2406static void free_untracked(struct untracked_cache_dir *ucd)
2407{
2408 int i;
2409 if (!ucd)
2410 return;
2411 for (i = 0; i < ucd->dirs_nr; i++)
2412 free_untracked(ucd->dirs[i]);
2413 for (i = 0; i < ucd->untracked_nr; i++)
2414 free(ucd->untracked[i]);
2415 free(ucd->untracked);
2416 free(ucd->dirs);
2417 free(ucd);
2418}
2419
2420void free_untracked_cache(struct untracked_cache *uc)
2421{
2422 if (uc)
2423 free_untracked(uc->root);
2424 free(uc);
2425}
2426
2427struct read_data {
2428 int index;
2429 struct untracked_cache_dir **ucd;
2430 struct ewah_bitmap *check_only;
2431 struct ewah_bitmap *valid;
2432 struct ewah_bitmap *sha1_valid;
2433 const unsigned char *data;
2434 const unsigned char *end;
2435};
2436
2437static void stat_data_from_disk(struct stat_data *to, const struct stat_data *from)
2438{
2439 to->sd_ctime.sec = get_be32(&from->sd_ctime.sec);
2440 to->sd_ctime.nsec = get_be32(&from->sd_ctime.nsec);
2441 to->sd_mtime.sec = get_be32(&from->sd_mtime.sec);
2442 to->sd_mtime.nsec = get_be32(&from->sd_mtime.nsec);
2443 to->sd_dev = get_be32(&from->sd_dev);
2444 to->sd_ino = get_be32(&from->sd_ino);
2445 to->sd_uid = get_be32(&from->sd_uid);
2446 to->sd_gid = get_be32(&from->sd_gid);
2447 to->sd_size = get_be32(&from->sd_size);
2448}
2449
2450static int read_one_dir(struct untracked_cache_dir **untracked_,
2451 struct read_data *rd)
2452{
2453 struct untracked_cache_dir ud, *untracked;
2454 const unsigned char *next, *data = rd->data, *end = rd->end;
2455 unsigned int value;
2456 int i, len;
2457
2458 memset(&ud, 0, sizeof(ud));
2459
2460 next = data;
2461 value = decode_varint(&next);
2462 if (next > end)
2463 return -1;
2464 ud.recurse = 1;
2465 ud.untracked_alloc = value;
2466 ud.untracked_nr = value;
2467 if (ud.untracked_nr)
b32fa95f 2468 ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
f9e6c649
NTND
2469 data = next;
2470
2471 next = data;
2472 ud.dirs_alloc = ud.dirs_nr = decode_varint(&next);
2473 if (next > end)
2474 return -1;
b32fa95f 2475 ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
f9e6c649
NTND
2476 data = next;
2477
2478 len = strlen((const char *)data);
2479 next = data + len + 1;
2480 if (next > rd->end)
2481 return -1;
50a6c8ef 2482 *untracked_ = untracked = xmalloc(st_add(sizeof(*untracked), len));
f9e6c649
NTND
2483 memcpy(untracked, &ud, sizeof(ud));
2484 memcpy(untracked->name, data, len + 1);
2485 data = next;
2486
2487 for (i = 0; i < untracked->untracked_nr; i++) {
2488 len = strlen((const char *)data);
2489 next = data + len + 1;
2490 if (next > rd->end)
2491 return -1;
2492 untracked->untracked[i] = xstrdup((const char*)data);
2493 data = next;
2494 }
2495
2496 rd->ucd[rd->index++] = untracked;
2497 rd->data = data;
2498
2499 for (i = 0; i < untracked->dirs_nr; i++) {
2500 len = read_one_dir(untracked->dirs + i, rd);
2501 if (len < 0)
2502 return -1;
2503 }
2504 return 0;
2505}
2506
2507static void set_check_only(size_t pos, void *cb)
2508{
2509 struct read_data *rd = cb;
2510 struct untracked_cache_dir *ud = rd->ucd[pos];
2511 ud->check_only = 1;
2512}
2513
2514static void read_stat(size_t pos, void *cb)
2515{
2516 struct read_data *rd = cb;
2517 struct untracked_cache_dir *ud = rd->ucd[pos];
2518 if (rd->data + sizeof(struct stat_data) > rd->end) {
2519 rd->data = rd->end + 1;
2520 return;
2521 }
2522 stat_data_from_disk(&ud->stat_data, (struct stat_data *)rd->data);
2523 rd->data += sizeof(struct stat_data);
2524 ud->valid = 1;
2525}
2526
2527static void read_sha1(size_t pos, void *cb)
2528{
2529 struct read_data *rd = cb;
2530 struct untracked_cache_dir *ud = rd->ucd[pos];
2531 if (rd->data + 20 > rd->end) {
2532 rd->data = rd->end + 1;
2533 return;
2534 }
2535 hashcpy(ud->exclude_sha1, rd->data);
2536 rd->data += 20;
2537}
2538
2539static void load_sha1_stat(struct sha1_stat *sha1_stat,
2540 const struct stat_data *stat,
2541 const unsigned char *sha1)
2542{
2543 stat_data_from_disk(&sha1_stat->stat, stat);
2544 hashcpy(sha1_stat->sha1, sha1);
2545 sha1_stat->valid = 1;
2546}
2547
2548struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
2549{
2550 const struct ondisk_untracked_cache *ouc;
2551 struct untracked_cache *uc;
2552 struct read_data rd;
2553 const unsigned char *next = data, *end = (const unsigned char *)data + sz;
1e8fef60
NTND
2554 const char *ident;
2555 int ident_len, len;
f9e6c649
NTND
2556
2557 if (sz <= 1 || end[-1] != '\0')
2558 return NULL;
2559 end--;
2560
1e8fef60
NTND
2561 ident_len = decode_varint(&next);
2562 if (next + ident_len > end)
2563 return NULL;
2564 ident = (const char *)next;
2565 next += ident_len;
2566
f9e6c649
NTND
2567 ouc = (const struct ondisk_untracked_cache *)next;
2568 if (next + ouc_size(0) > end)
2569 return NULL;
2570
2571 uc = xcalloc(1, sizeof(*uc));
1e8fef60
NTND
2572 strbuf_init(&uc->ident, ident_len);
2573 strbuf_add(&uc->ident, ident, ident_len);
f9e6c649
NTND
2574 load_sha1_stat(&uc->ss_info_exclude, &ouc->info_exclude_stat,
2575 ouc->info_exclude_sha1);
2576 load_sha1_stat(&uc->ss_excludes_file, &ouc->excludes_file_stat,
2577 ouc->excludes_file_sha1);
2578 uc->dir_flags = get_be32(&ouc->dir_flags);
2579 uc->exclude_per_dir = xstrdup(ouc->exclude_per_dir);
2580 /* NUL after exclude_per_dir is covered by sizeof(*ouc) */
2581 next += ouc_size(strlen(ouc->exclude_per_dir));
2582 if (next >= end)
2583 goto done2;
2584
2585 len = decode_varint(&next);
2586 if (next > end || len == 0)
2587 goto done2;
2588
2589 rd.valid = ewah_new();
2590 rd.check_only = ewah_new();
2591 rd.sha1_valid = ewah_new();
2592 rd.data = next;
2593 rd.end = end;
2594 rd.index = 0;
b32fa95f 2595 ALLOC_ARRAY(rd.ucd, len);
f9e6c649
NTND
2596
2597 if (read_one_dir(&uc->root, &rd) || rd.index != len)
2598 goto done;
2599
2600 next = rd.data;
2601 len = ewah_read_mmap(rd.valid, next, end - next);
2602 if (len < 0)
2603 goto done;
2604
2605 next += len;
2606 len = ewah_read_mmap(rd.check_only, next, end - next);
2607 if (len < 0)
2608 goto done;
2609
2610 next += len;
2611 len = ewah_read_mmap(rd.sha1_valid, next, end - next);
2612 if (len < 0)
2613 goto done;
2614
2615 ewah_each_bit(rd.check_only, set_check_only, &rd);
2616 rd.data = next + len;
2617 ewah_each_bit(rd.valid, read_stat, &rd);
2618 ewah_each_bit(rd.sha1_valid, read_sha1, &rd);
2619 next = rd.data;
2620
2621done:
2622 free(rd.ucd);
2623 ewah_free(rd.valid);
2624 ewah_free(rd.check_only);
2625 ewah_free(rd.sha1_valid);
2626done2:
2627 if (next != end) {
2628 free_untracked_cache(uc);
2629 uc = NULL;
2630 }
2631 return uc;
2632}
e931371a 2633
73f9145f
NTND
2634static void invalidate_one_directory(struct untracked_cache *uc,
2635 struct untracked_cache_dir *ucd)
2636{
2637 uc->dir_invalidated++;
2638 ucd->valid = 0;
2639 ucd->untracked_nr = 0;
2640}
2641
2642/*
2643 * Normally when an entry is added or removed from a directory,
2644 * invalidating that directory is enough. No need to touch its
2645 * ancestors. When a directory is shown as "foo/bar/" in git-status
2646 * however, deleting or adding an entry may have cascading effect.
2647 *
2648 * Say the "foo/bar/file" has become untracked, we need to tell the
2649 * untracked_cache_dir of "foo" that "bar/" is not an untracked
2650 * directory any more (because "bar" is managed by foo as an untracked
2651 * "file").
2652 *
2653 * Similarly, if "foo/bar/file" moves from untracked to tracked and it
2654 * was the last untracked entry in the entire "foo", we should show
2655 * "foo/" instead. Which means we have to invalidate past "bar" up to
2656 * "foo".
2657 *
2658 * This function traverses all directories from root to leaf. If there
2659 * is a chance of one of the above cases happening, we invalidate back
2660 * to root. Otherwise we just invalidate the leaf. There may be a more
2661 * sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
2662 * detect these cases and avoid unnecessary invalidation, for example,
2663 * checking for the untracked entry named "bar/" in "foo", but for now
2664 * stick to something safe and simple.
2665 */
2666static int invalidate_one_component(struct untracked_cache *uc,
2667 struct untracked_cache_dir *dir,
2668 const char *path, int len)
2669{
2670 const char *rest = strchr(path, '/');
2671
2672 if (rest) {
2673 int component_len = rest - path;
2674 struct untracked_cache_dir *d =
2675 lookup_untracked(uc, dir, path, component_len);
2676 int ret =
2677 invalidate_one_component(uc, d, rest + 1,
2678 len - (component_len + 1));
2679 if (ret)
2680 invalidate_one_directory(uc, dir);
2681 return ret;
2682 }
2683
2684 invalidate_one_directory(uc, dir);
2685 return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
2686}
2687
e931371a
NTND
2688void untracked_cache_invalidate_path(struct index_state *istate,
2689 const char *path)
2690{
e931371a
NTND
2691 if (!istate->untracked || !istate->untracked->root)
2692 return;
73f9145f
NTND
2693 invalidate_one_component(istate->untracked, istate->untracked->root,
2694 path, strlen(path));
e931371a
NTND
2695}
2696
2697void untracked_cache_remove_from_index(struct index_state *istate,
2698 const char *path)
2699{
2700 untracked_cache_invalidate_path(istate, path);
2701}
2702
2703void untracked_cache_add_to_index(struct index_state *istate,
2704 const char *path)
2705{
2706 untracked_cache_invalidate_path(istate, path);
2707}