forked from libgit2/libgit2
-
Notifications
You must be signed in to change notification settings - Fork 6
Expand file tree
/
Copy pathindex.c
More file actions
3972 lines (3144 loc) · 95.2 KB
/
Copy pathindex.c
File metadata and controls
3972 lines (3144 loc) · 95.2 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "index.h"
#include <stddef.h>
#include "repository.h"
#include "tree.h"
#include "tree-cache.h"
#include "hash.h"
#include "iterator.h"
#include "pathspec.h"
#include "ignore.h"
#include "blob.h"
#include "idxmap.h"
#include "diff.h"
#include "varint.h"
#include "path.h"
#include "git2/odb.h"
#include "git2/oid.h"
#include "git2/blob.h"
#include "git2/config.h"
#include "git2/sys/index.h"
static int index_apply_to_wd_diff(git_index *index, int action, const git_strarray *paths,
unsigned int flags,
git_index_matched_path_cb cb, void *payload);
static const size_t INDEX_HEADER_SIZE = 12;
static const unsigned int INDEX_VERSION_NUMBER_DEFAULT = 2;
static const unsigned int INDEX_VERSION_NUMBER_LB = 2;
static const unsigned int INDEX_VERSION_NUMBER_EXT = 3;
static const unsigned int INDEX_VERSION_NUMBER_COMP = 4;
static const unsigned int INDEX_VERSION_NUMBER_UB = 4;
static const unsigned int INDEX_HEADER_SIG = 0x44495243;
static const char INDEX_EXT_TREECACHE_SIG[] = {'T', 'R', 'E', 'E'};
static const char INDEX_EXT_UNMERGED_SIG[] = {'R', 'E', 'U', 'C'};
static const char INDEX_EXT_CONFLICT_NAME_SIG[] = {'N', 'A', 'M', 'E'};
#define INDEX_OWNER(idx) ((git_repository *)(GIT_REFCOUNT_OWNER(idx)))
struct index_header {
uint32_t signature;
uint32_t version;
uint32_t entry_count;
};
struct index_extension {
char signature[4];
uint32_t extension_size;
};
struct entry_time {
uint32_t seconds;
uint32_t nanoseconds;
};
struct entry_common {
struct entry_time ctime;
struct entry_time mtime;
uint32_t dev;
uint32_t ino;
uint32_t mode;
uint32_t uid;
uint32_t gid;
uint32_t file_size;
};
#define entry_short(oid_size) \
struct { \
struct entry_common common; \
unsigned char oid[oid_size]; \
uint16_t flags; \
char path[1]; /* arbitrary length */ \
}
#define entry_long(oid_size) \
struct { \
struct entry_common common; \
unsigned char oid[oid_size]; \
uint16_t flags; \
uint16_t flags_extended; \
char path[1]; /* arbitrary length */ \
}
typedef entry_short(GIT_OID_SHA1_SIZE) index_entry_short_sha1;
typedef entry_long(GIT_OID_SHA1_SIZE) index_entry_long_sha1;
#ifdef GIT_EXPERIMENTAL_SHA256
typedef entry_short(GIT_OID_SHA256_SIZE) index_entry_short_sha256;
typedef entry_long(GIT_OID_SHA256_SIZE) index_entry_long_sha256;
#endif
#undef entry_short
#undef entry_long
struct entry_srch_key {
const char *path;
size_t pathlen;
int stage;
};
struct entry_internal {
git_index_entry entry;
size_t pathlen;
char path[GIT_FLEX_ARRAY];
};
struct reuc_entry_internal {
git_index_reuc_entry entry;
size_t pathlen;
char path[GIT_FLEX_ARRAY];
};
bool git_index__enforce_unsaved_safety = false;
/* local declarations */
static int read_extension(size_t *read_len, git_index *index, size_t checksum_size, const char *buffer, size_t buffer_size);
static int read_header(struct index_header *dest, const void *buffer);
static int parse_index(git_index *index, const char *buffer, size_t buffer_size);
static bool is_index_extended(git_index *index);
static int write_index(unsigned char checksum[GIT_HASH_MAX_SIZE], size_t *checksum_size, git_index *index, git_filebuf *file);
static void index_entry_free(git_index_entry *entry);
static void index_entry_reuc_free(git_index_reuc_entry *reuc);
GIT_INLINE(int) index_map_set(git_idxmap *map, git_index_entry *e, bool ignore_case)
{
if (ignore_case)
return git_idxmap_icase_set((git_idxmap_icase *) map, e, e);
else
return git_idxmap_set(map, e, e);
}
GIT_INLINE(int) index_map_delete(git_idxmap *map, git_index_entry *e, bool ignore_case)
{
if (ignore_case)
return git_idxmap_icase_delete((git_idxmap_icase *) map, e);
else
return git_idxmap_delete(map, e);
}
GIT_INLINE(int) index_map_resize(git_idxmap *map, size_t count, bool ignore_case)
{
if (ignore_case)
return git_idxmap_icase_resize((git_idxmap_icase *) map, count);
else
return git_idxmap_resize(map, count);
}
int git_index_entry_srch(const void *key, const void *array_member)
{
const struct entry_srch_key *srch_key = key;
const struct entry_internal *entry = array_member;
int cmp;
size_t len1, len2, len;
len1 = srch_key->pathlen;
len2 = entry->pathlen;
len = len1 < len2 ? len1 : len2;
cmp = memcmp(srch_key->path, entry->path, len);
if (cmp)
return cmp;
if (len1 < len2)
return -1;
if (len1 > len2)
return 1;
if (srch_key->stage != GIT_INDEX_STAGE_ANY)
return srch_key->stage - GIT_INDEX_ENTRY_STAGE(&entry->entry);
return 0;
}
int git_index_entry_isrch(const void *key, const void *array_member)
{
const struct entry_srch_key *srch_key = key;
const struct entry_internal *entry = array_member;
int cmp;
size_t len1, len2, len;
len1 = srch_key->pathlen;
len2 = entry->pathlen;
len = len1 < len2 ? len1 : len2;
cmp = strncasecmp(srch_key->path, entry->path, len);
if (cmp)
return cmp;
if (len1 < len2)
return -1;
if (len1 > len2)
return 1;
if (srch_key->stage != GIT_INDEX_STAGE_ANY)
return srch_key->stage - GIT_INDEX_ENTRY_STAGE(&entry->entry);
return 0;
}
static int index_entry_srch_path(const void *path, const void *array_member)
{
const git_index_entry *entry = array_member;
return strcmp((const char *)path, entry->path);
}
static int index_entry_isrch_path(const void *path, const void *array_member)
{
const git_index_entry *entry = array_member;
return strcasecmp((const char *)path, entry->path);
}
int git_index_entry_cmp(const void *a, const void *b)
{
int diff;
const git_index_entry *entry_a = a;
const git_index_entry *entry_b = b;
diff = strcmp(entry_a->path, entry_b->path);
if (diff == 0)
diff = (GIT_INDEX_ENTRY_STAGE(entry_a) - GIT_INDEX_ENTRY_STAGE(entry_b));
return diff;
}
int git_index_entry_icmp(const void *a, const void *b)
{
int diff;
const git_index_entry *entry_a = a;
const git_index_entry *entry_b = b;
diff = strcasecmp(entry_a->path, entry_b->path);
if (diff == 0)
diff = (GIT_INDEX_ENTRY_STAGE(entry_a) - GIT_INDEX_ENTRY_STAGE(entry_b));
return diff;
}
static int conflict_name_cmp(const void *a, const void *b)
{
const git_index_name_entry *name_a = a;
const git_index_name_entry *name_b = b;
if (name_a->ancestor && !name_b->ancestor)
return 1;
if (!name_a->ancestor && name_b->ancestor)
return -1;
if (name_a->ancestor)
return strcmp(name_a->ancestor, name_b->ancestor);
if (!name_a->ours || !name_b->ours)
return 0;
return strcmp(name_a->ours, name_b->ours);
}
/**
* TODO: enable this when resolving case insensitive conflicts
*/
#if 0
static int conflict_name_icmp(const void *a, const void *b)
{
const git_index_name_entry *name_a = a;
const git_index_name_entry *name_b = b;
if (name_a->ancestor && !name_b->ancestor)
return 1;
if (!name_a->ancestor && name_b->ancestor)
return -1;
if (name_a->ancestor)
return strcasecmp(name_a->ancestor, name_b->ancestor);
if (!name_a->ours || !name_b->ours)
return 0;
return strcasecmp(name_a->ours, name_b->ours);
}
#endif
static int reuc_srch(const void *key, const void *array_member)
{
const git_index_reuc_entry *reuc = array_member;
return strcmp(key, reuc->path);
}
static int reuc_isrch(const void *key, const void *array_member)
{
const git_index_reuc_entry *reuc = array_member;
return strcasecmp(key, reuc->path);
}
static int reuc_cmp(const void *a, const void *b)
{
const git_index_reuc_entry *info_a = a;
const git_index_reuc_entry *info_b = b;
return strcmp(info_a->path, info_b->path);
}
static int reuc_icmp(const void *a, const void *b)
{
const git_index_reuc_entry *info_a = a;
const git_index_reuc_entry *info_b = b;
return strcasecmp(info_a->path, info_b->path);
}
static void index_entry_reuc_free(git_index_reuc_entry *reuc)
{
git__free(reuc);
}
static void index_entry_free(git_index_entry *entry)
{
if (!entry)
return;
memset(&entry->id, 0, sizeof(entry->id));
git__free(entry);
}
unsigned int git_index__create_mode(unsigned int mode)
{
if (S_ISLNK(mode))
return S_IFLNK;
if (S_ISDIR(mode) || (mode & S_IFMT) == (S_IFLNK | S_IFDIR))
return (S_IFLNK | S_IFDIR);
return S_IFREG | GIT_PERMS_CANONICAL(mode);
}
static unsigned int index_merge_mode(
git_index *index, git_index_entry *existing, unsigned int mode)
{
if (index->no_symlinks && S_ISREG(mode) &&
existing && S_ISLNK(existing->mode))
return existing->mode;
if (index->distrust_filemode && S_ISREG(mode))
return (existing && S_ISREG(existing->mode)) ?
existing->mode : git_index__create_mode(0666);
return git_index__create_mode(mode);
}
GIT_INLINE(int) index_find_in_entries(
size_t *out, git_vector *entries, git_vector_cmp entry_srch,
const char *path, size_t path_len, int stage)
{
struct entry_srch_key srch_key;
srch_key.path = path;
srch_key.pathlen = !path_len ? strlen(path) : path_len;
srch_key.stage = stage;
return git_vector_bsearch2(out, entries, entry_srch, &srch_key);
}
GIT_INLINE(int) index_find(
size_t *out, git_index *index,
const char *path, size_t path_len, int stage)
{
git_vector_sort(&index->entries);
return index_find_in_entries(
out, &index->entries, index->entries_search, path, path_len, stage);
}
void git_index__set_ignore_case(git_index *index, bool ignore_case)
{
index->ignore_case = ignore_case;
if (ignore_case) {
index->entries_cmp_path = git__strcasecmp_cb;
index->entries_search = git_index_entry_isrch;
index->entries_search_path = index_entry_isrch_path;
index->reuc_search = reuc_isrch;
} else {
index->entries_cmp_path = git__strcmp_cb;
index->entries_search = git_index_entry_srch;
index->entries_search_path = index_entry_srch_path;
index->reuc_search = reuc_srch;
}
git_vector_set_cmp(&index->entries,
ignore_case ? git_index_entry_icmp : git_index_entry_cmp);
git_vector_sort(&index->entries);
git_vector_set_cmp(&index->reuc, ignore_case ? reuc_icmp : reuc_cmp);
git_vector_sort(&index->reuc);
}
int git_index__open(
git_index **index_out,
const char *index_path,
git_oid_t oid_type)
{
git_index *index;
int error = -1;
GIT_ASSERT_ARG(index_out);
index = git__calloc(1, sizeof(git_index));
GIT_ERROR_CHECK_ALLOC(index);
index->oid_type = oid_type;
if (git_pool_init(&index->tree_pool, 1) < 0)
goto fail;
if (index_path != NULL) {
index->index_file_path = git__strdup(index_path);
if (!index->index_file_path)
goto fail;
/* Check if index file is stored on disk already */
if (git_fs_path_exists(index->index_file_path) == true)
index->on_disk = 1;
}
if (git_vector_init(&index->entries, 32, git_index_entry_cmp) < 0 ||
git_idxmap_new(&index->entries_map) < 0 ||
git_vector_init(&index->names, 8, conflict_name_cmp) < 0 ||
git_vector_init(&index->reuc, 8, reuc_cmp) < 0 ||
git_vector_init(&index->deleted, 8, git_index_entry_cmp) < 0)
goto fail;
index->entries_cmp_path = git__strcmp_cb;
index->entries_search = git_index_entry_srch;
index->entries_search_path = index_entry_srch_path;
index->reuc_search = reuc_srch;
index->version = INDEX_VERSION_NUMBER_DEFAULT;
if (index_path != NULL && (error = git_index_read(index, true)) < 0)
goto fail;
*index_out = index;
GIT_REFCOUNT_INC(index);
return 0;
fail:
git_pool_clear(&index->tree_pool);
git_index_free(index);
return error;
}
#ifdef GIT_EXPERIMENTAL_SHA256
int git_index_open(git_index **index_out, const char *index_path, git_oid_t oid_type)
{
return git_index__open(index_out, index_path, oid_type);
}
#else
int git_index_open(git_index **index_out, const char *index_path)
{
return git_index__open(index_out, index_path, GIT_OID_SHA1);
}
#endif
int git_index__new(git_index **out, git_oid_t oid_type)
{
return git_index__open(out, NULL, oid_type);
}
#ifdef GIT_EXPERIMENTAL_SHA256
int git_index_new(git_index **out, git_oid_t oid_type)
{
return git_index__new(out, oid_type);
}
#else
int git_index_new(git_index **out)
{
return git_index__new(out, GIT_OID_SHA1);
}
#endif
static void index_free(git_index *index)
{
/* index iterators increment the refcount of the index, so if we
* get here then there should be no outstanding iterators.
*/
if (git_atomic32_get(&index->readers))
return;
git_index_clear(index);
git_idxmap_free(index->entries_map);
git_vector_free(&index->entries);
git_vector_free(&index->names);
git_vector_free(&index->reuc);
git_vector_free(&index->deleted);
git__free(index->index_file_path);
git__memzero(index, sizeof(*index));
git__free(index);
}
void git_index_free(git_index *index)
{
if (index == NULL)
return;
GIT_REFCOUNT_DEC(index, index_free);
}
/* call with locked index */
static void index_free_deleted(git_index *index)
{
int readers = (int)git_atomic32_get(&index->readers);
size_t i;
if (readers > 0 || !index->deleted.length)
return;
for (i = 0; i < index->deleted.length; ++i) {
git_index_entry *ie = git_atomic_swap(index->deleted.contents[i], NULL);
index_entry_free(ie);
}
git_vector_clear(&index->deleted);
}
/* call with locked index */
static int index_remove_entry(git_index *index, size_t pos)
{
int error = 0;
git_index_entry *entry = git_vector_get(&index->entries, pos);
if (entry != NULL) {
git_tree_cache_invalidate_path(index->tree, entry->path);
index_map_delete(index->entries_map, entry, index->ignore_case);
}
error = git_vector_remove(&index->entries, pos);
if (!error) {
if (git_atomic32_get(&index->readers) > 0) {
error = git_vector_insert(&index->deleted, entry);
} else {
index_entry_free(entry);
}
index->dirty = 1;
}
return error;
}
int git_index_clear(git_index *index)
{
int error = 0;
GIT_ASSERT_ARG(index);
index->dirty = 1;
index->tree = NULL;
git_pool_clear(&index->tree_pool);
git_idxmap_clear(index->entries_map);
while (!error && index->entries.length > 0)
error = index_remove_entry(index, index->entries.length - 1);
if (error)
goto done;
index_free_deleted(index);
if ((error = git_index_name_clear(index)) < 0 ||
(error = git_index_reuc_clear(index)) < 0)
goto done;
git_futils_filestamp_set(&index->stamp, NULL);
done:
return error;
}
static int create_index_error(int error, const char *msg)
{
git_error_set_str(GIT_ERROR_INDEX, msg);
return error;
}
int git_index_set_caps(git_index *index, int caps)
{
unsigned int old_ignore_case;
GIT_ASSERT_ARG(index);
old_ignore_case = index->ignore_case;
if (caps == GIT_INDEX_CAPABILITY_FROM_OWNER) {
git_repository *repo = INDEX_OWNER(index);
int val;
if (!repo)
return create_index_error(
-1, "cannot access repository to set index caps");
if (!git_repository__configmap_lookup(&val, repo, GIT_CONFIGMAP_IGNORECASE))
index->ignore_case = (val != 0);
if (!git_repository__configmap_lookup(&val, repo, GIT_CONFIGMAP_FILEMODE))
index->distrust_filemode = (val == 0);
if (!git_repository__configmap_lookup(&val, repo, GIT_CONFIGMAP_SYMLINKS))
index->no_symlinks = (val == 0);
}
else {
index->ignore_case = ((caps & GIT_INDEX_CAPABILITY_IGNORE_CASE) != 0);
index->distrust_filemode = ((caps & GIT_INDEX_CAPABILITY_NO_FILEMODE) != 0);
index->no_symlinks = ((caps & GIT_INDEX_CAPABILITY_NO_SYMLINKS) != 0);
}
if (old_ignore_case != index->ignore_case) {
git_index__set_ignore_case(index, (bool)index->ignore_case);
}
return 0;
}
int git_index_caps(const git_index *index)
{
return ((index->ignore_case ? GIT_INDEX_CAPABILITY_IGNORE_CASE : 0) |
(index->distrust_filemode ? GIT_INDEX_CAPABILITY_NO_FILEMODE : 0) |
(index->no_symlinks ? GIT_INDEX_CAPABILITY_NO_SYMLINKS : 0));
}
#ifndef GIT_DEPRECATE_HARD
const git_oid *git_index_checksum(git_index *index)
{
return (git_oid *)index->checksum;
}
#endif
/**
* Returns 1 for changed, 0 for not changed and <0 for errors
*/
static int compare_checksum(git_index *index)
{
int fd;
ssize_t bytes_read;
unsigned char checksum[GIT_HASH_MAX_SIZE];
size_t checksum_size = git_oid_size(index->oid_type);
if ((fd = p_open(index->index_file_path, O_RDONLY)) < 0)
return fd;
if (p_lseek(fd, (0 - (ssize_t)checksum_size), SEEK_END) < 0) {
p_close(fd);
git_error_set(GIT_ERROR_OS, "failed to seek to end of file");
return -1;
}
bytes_read = p_read(fd, checksum, checksum_size);
p_close(fd);
if (bytes_read < (ssize_t)checksum_size)
return -1;
return !!memcmp(checksum, index->checksum, checksum_size);
}
int git_index_read(git_index *index, int force)
{
int error = 0, updated;
git_str buffer = GIT_STR_INIT;
git_futils_filestamp stamp = index->stamp;
if (!index->index_file_path)
return create_index_error(-1,
"failed to read index: The index is in-memory only");
index->on_disk = git_fs_path_exists(index->index_file_path);
if (!index->on_disk) {
if (force && (error = git_index_clear(index)) < 0)
return error;
index->dirty = 0;
return 0;
}
if ((updated = git_futils_filestamp_check(&stamp, index->index_file_path) < 0) ||
((updated = compare_checksum(index)) < 0)) {
git_error_set(
GIT_ERROR_INDEX,
"failed to read index: '%s' no longer exists",
index->index_file_path);
return updated;
}
if (!updated && !force)
return 0;
error = git_futils_readbuffer(&buffer, index->index_file_path);
if (error < 0)
return error;
index->tree = NULL;
git_pool_clear(&index->tree_pool);
error = git_index_clear(index);
if (!error)
error = parse_index(index, buffer.ptr, buffer.size);
if (!error) {
git_futils_filestamp_set(&index->stamp, &stamp);
index->dirty = 0;
}
git_str_dispose(&buffer);
return error;
}
int git_index_read_safely(git_index *index)
{
if (git_index__enforce_unsaved_safety && index->dirty) {
git_error_set(GIT_ERROR_INDEX,
"the index has unsaved changes that would be overwritten by this operation");
return GIT_EINDEXDIRTY;
}
return git_index_read(index, false);
}
static bool is_racy_entry(git_index *index, const git_index_entry *entry)
{
/* Git special-cases submodules in the check */
if (S_ISGITLINK(entry->mode))
return false;
return git_index_entry_newer_than_index(entry, index);
}
/*
* Force the next diff to take a look at those entries which have the
* same timestamp as the current index.
*/
static int truncate_racily_clean(git_index *index)
{
size_t i;
int error;
git_index_entry *entry;
git_diff_options diff_opts = GIT_DIFF_OPTIONS_INIT;
git_diff *diff = NULL;
git_vector paths = GIT_VECTOR_INIT;
git_diff_delta *delta;
/* Nothing to do if there's no repo to talk about */
if (!INDEX_OWNER(index))
return 0;
/* If there's no workdir, we can't know where to even check */
if (!git_repository_workdir(INDEX_OWNER(index)))
return 0;
diff_opts.flags |= GIT_DIFF_INCLUDE_TYPECHANGE | GIT_DIFF_IGNORE_SUBMODULES | GIT_DIFF_DISABLE_PATHSPEC_MATCH;
git_vector_foreach(&index->entries, i, entry) {
if ((entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE) == 0 &&
is_racy_entry(index, entry))
git_vector_insert(&paths, (char *)entry->path);
}
if (paths.length == 0)
goto done;
diff_opts.pathspec.count = paths.length;
diff_opts.pathspec.strings = (char **)paths.contents;
if ((error = git_diff_index_to_workdir(&diff, INDEX_OWNER(index), index, &diff_opts)) < 0)
return error;
git_vector_foreach(&diff->deltas, i, delta) {
entry = (git_index_entry *)git_index_get_bypath(index, delta->old_file.path, 0);
/* Ensure that we have a stage 0 for this file (ie, it's not a
* conflict), otherwise smudging it is quite pointless.
*/
if (entry) {
entry->file_size = 0;
index->dirty = 1;
}
}
done:
git_diff_free(diff);
git_vector_free(&paths);
return 0;
}
unsigned git_index_version(git_index *index)
{
GIT_ASSERT_ARG(index);
return index->version;
}
int git_index_set_version(git_index *index, unsigned int version)
{
GIT_ASSERT_ARG(index);
if (version < INDEX_VERSION_NUMBER_LB ||
version > INDEX_VERSION_NUMBER_UB) {
git_error_set(GIT_ERROR_INDEX, "invalid version number");
return -1;
}
index->version = version;
return 0;
}
int git_index_write(git_index *index)
{
git_indexwriter writer = GIT_INDEXWRITER_INIT;
int error;
truncate_racily_clean(index);
if ((error = git_indexwriter_init(&writer, index)) == 0 &&
(error = git_indexwriter_commit(&writer)) == 0)
index->dirty = 0;
git_indexwriter_cleanup(&writer);
return error;
}
const char *git_index_path(const git_index *index)
{
GIT_ASSERT_ARG_WITH_RETVAL(index, NULL);
return index->index_file_path;
}
int git_index_write_tree(git_oid *oid, git_index *index)
{
git_repository *repo;
GIT_ASSERT_ARG(oid);
GIT_ASSERT_ARG(index);
repo = INDEX_OWNER(index);
if (repo == NULL)
return create_index_error(-1, "Failed to write tree. "
"the index file is not backed up by an existing repository");
return git_tree__write_index(oid, index, repo);
}
int git_index_write_tree_to(
git_oid *oid, git_index *index, git_repository *repo)
{
GIT_ASSERT_ARG(oid);
GIT_ASSERT_ARG(index);
GIT_ASSERT_ARG(repo);
return git_tree__write_index(oid, index, repo);
}
size_t git_index_entrycount(const git_index *index)
{
GIT_ASSERT_ARG(index);
return index->entries.length;
}
const git_index_entry *git_index_get_byindex(
git_index *index, size_t n)
{
GIT_ASSERT_ARG_WITH_RETVAL(index, NULL);
git_vector_sort(&index->entries);
return git_vector_get(&index->entries, n);
}
const git_index_entry *git_index_get_bypath(
git_index *index, const char *path, int stage)
{
git_index_entry key = {{ 0 }};
git_index_entry *value;
GIT_ASSERT_ARG_WITH_RETVAL(index, NULL);
key.path = path;
GIT_INDEX_ENTRY_STAGE_SET(&key, stage);
if (index->ignore_case)
value = git_idxmap_icase_get((git_idxmap_icase *) index->entries_map, &key);
else
value = git_idxmap_get(index->entries_map, &key);
if (!value) {
git_error_set(GIT_ERROR_INDEX, "index does not contain '%s'", path);
return NULL;
}
return value;
}
void git_index_entry__init_from_stat(
git_index_entry *entry, struct stat *st, bool trust_mode)
{
entry->ctime.seconds = (int32_t)st->st_ctime;
entry->mtime.seconds = (int32_t)st->st_mtime;
#if defined(GIT_USE_NSEC)
entry->mtime.nanoseconds = st->st_mtime_nsec;
entry->ctime.nanoseconds = st->st_ctime_nsec;
#endif
entry->dev = st->st_rdev;
entry->ino = st->st_ino;
entry->mode = (!trust_mode && S_ISREG(st->st_mode)) ?
git_index__create_mode(0666) : git_index__create_mode(st->st_mode);
entry->uid = st->st_uid;
entry->gid = st->st_gid;
entry->file_size = (uint32_t)st->st_size;
}
static void index_entry_adjust_namemask(
git_index_entry *entry,
size_t path_length)
{
entry->flags &= ~GIT_INDEX_ENTRY_NAMEMASK;
if (path_length < GIT_INDEX_ENTRY_NAMEMASK)
entry->flags |= path_length & GIT_INDEX_ENTRY_NAMEMASK;
else
entry->flags |= GIT_INDEX_ENTRY_NAMEMASK;
}
/* When `from_workdir` is true, we will validate the paths to avoid placing
* paths that are invalid for the working directory on the current filesystem
* (eg, on Windows, we will disallow `GIT~1`, `AUX`, `COM1`, etc). This
* function will *always* prevent `.git` and directory traversal `../` from
* being added to the index.
*/
static int index_entry_create(
git_index_entry **out,
git_repository *repo,
const char *path,
struct stat *st,
bool from_workdir)
{
size_t pathlen = strlen(path), alloclen;
struct entry_internal *entry;
unsigned int path_valid_flags = GIT_PATH_REJECT_INDEX_DEFAULTS;
uint16_t mode = 0;
/* always reject placing `.git` in the index and directory traversal.
* when requested, disallow platform-specific filenames and upgrade to
* the platform-specific `.git` tests (eg, `git~1`, etc).
*/
if (from_workdir)
path_valid_flags |= GIT_PATH_REJECT_WORKDIR_DEFAULTS;
if (st)
mode = st->st_mode;
if (!git_path_is_valid(repo, path, mode, path_valid_flags)) {
git_error_set(GIT_ERROR_INDEX, "invalid path: '%s'", path);
return -1;
}
GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, sizeof(struct entry_internal), pathlen);
GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, alloclen, 1);
entry = git__calloc(1, alloclen);
GIT_ERROR_CHECK_ALLOC(entry);
entry->pathlen = pathlen;
memcpy(entry->path, path, pathlen);
entry->entry.path = entry->path;
*out = (git_index_entry *)entry;
return 0;
}
static int index_entry_init(
git_index_entry **entry_out,
git_index *index,
const char *rel_path)
{
int error = 0;