forked from git/git
-
Notifications
You must be signed in to change notification settings - Fork 0
/
cache.h
1892 lines (1677 loc) · 65.8 KB
/
cache.h
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
#ifndef CACHE_H
#define CACHE_H
#include "git-compat-util.h"
#include "strbuf.h"
#include "hashmap.h"
#include "list.h"
#include "advice.h"
#include "gettext.h"
#include "convert.h"
#include "trace.h"
#include "trace2.h"
#include "string-list.h"
#include "pack-revindex.h"
#include "hash.h"
#include "path.h"
#include "oid-array.h"
#include "repository.h"
#include "mem-pool.h"
#include <zlib.h>
typedef struct git_zstream {
z_stream z;
unsigned long avail_in;
unsigned long avail_out;
unsigned long total_in;
unsigned long total_out;
unsigned char *next_in;
unsigned char *next_out;
} git_zstream;
void git_inflate_init(git_zstream *);
void git_inflate_init_gzip_only(git_zstream *);
void git_inflate_end(git_zstream *);
int git_inflate(git_zstream *, int flush);
void git_deflate_init(git_zstream *, int level);
void git_deflate_init_gzip(git_zstream *, int level);
void git_deflate_init_raw(git_zstream *, int level);
void git_deflate_end(git_zstream *);
int git_deflate_abort(git_zstream *);
int git_deflate_end_gently(git_zstream *);
int git_deflate(git_zstream *, int flush);
unsigned long git_deflate_bound(git_zstream *, unsigned long);
#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
#define DTYPE(de) ((de)->d_type)
#else
#undef DT_UNKNOWN
#undef DT_DIR
#undef DT_REG
#undef DT_LNK
#define DT_UNKNOWN 0
#define DT_DIR 1
#define DT_REG 2
#define DT_LNK 3
#define DTYPE(de) DT_UNKNOWN
#endif
/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
#define S_IFINVALID 0030000
/*
* A "directory link" is a link to another git directory.
*
* The value 0160000 is not normally a valid mode, and
* also just happens to be S_IFDIR + S_IFLNK
*/
#define S_IFGITLINK 0160000
#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK)
/*
* Some mode bits are also used internally for computations.
*
* They *must* not overlap with any valid modes, and they *must* not be emitted
* to outside world - i.e. appear on disk or network. In other words, it's just
* temporary fields, which we internally use, but they have to stay in-house.
*
* ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git
* codebase mode is `unsigned int` which is assumed to be at least 32 bits )
*/
/* used internally in tree-diff */
#define S_DIFFTREE_IFXMIN_NEQ 0x80000000
/*
* Intensive research over the course of many years has shown that
* port 9418 is totally unused by anything else. Or
*
* Your search - "port 9418" - did not match any documents.
*
* as www.google.com puts it.
*
* This port has been properly assigned for git use by IANA:
* git (Assigned-9418) [I06-050728-0001].
*
* git 9418/tcp git pack transfer service
* git 9418/udp git pack transfer service
*
* with Linus Torvalds <[email protected]> as the point of
* contact. September 2005.
*
* See http://www.iana.org/assignments/port-numbers
*/
#define DEFAULT_GIT_PORT 9418
/*
* Basic data structures for the directory cache
*/
#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
struct cache_header {
uint32_t hdr_signature;
uint32_t hdr_version;
uint32_t hdr_entries;
};
#define INDEX_FORMAT_LB 2
#define INDEX_FORMAT_UB 4
/*
* The "cache_time" is just the low 32 bits of the
* time. It doesn't matter if it overflows - we only
* check it for equality in the 32 bits we save.
*/
struct cache_time {
uint32_t sec;
uint32_t nsec;
};
struct stat_data {
struct cache_time sd_ctime;
struct cache_time sd_mtime;
unsigned int sd_dev;
unsigned int sd_ino;
unsigned int sd_uid;
unsigned int sd_gid;
unsigned int sd_size;
};
struct cache_entry {
struct hashmap_entry ent;
struct stat_data ce_stat_data;
unsigned int ce_mode;
unsigned int ce_flags;
unsigned int mem_pool_allocated;
unsigned int ce_namelen;
unsigned int index; /* for link extension */
struct object_id oid;
char name[FLEX_ARRAY]; /* more */
};
#define CE_STAGEMASK (0x3000)
#define CE_EXTENDED (0x4000)
#define CE_VALID (0x8000)
#define CE_STAGESHIFT 12
/*
* Range 0xFFFF0FFF in ce_flags is divided into
* two parts: in-memory flags and on-disk ones.
* Flags in CE_EXTENDED_FLAGS will get saved on-disk
* if you want to save a new flag, add it in
* CE_EXTENDED_FLAGS
*
* In-memory only flags
*/
#define CE_UPDATE (1 << 16)
#define CE_REMOVE (1 << 17)
#define CE_UPTODATE (1 << 18)
#define CE_ADDED (1 << 19)
#define CE_HASHED (1 << 20)
#define CE_FSMONITOR_VALID (1 << 21)
#define CE_WT_REMOVE (1 << 22) /* remove in work directory */
#define CE_CONFLICTED (1 << 23)
#define CE_UNPACKED (1 << 24)
#define CE_NEW_SKIP_WORKTREE (1 << 25)
/* used to temporarily mark paths matched by pathspecs */
#define CE_MATCHED (1 << 26)
#define CE_UPDATE_IN_BASE (1 << 27)
#define CE_STRIP_NAME (1 << 28)
/*
* Extended on-disk flags
*/
#define CE_INTENT_TO_ADD (1 << 29)
#define CE_SKIP_WORKTREE (1 << 30)
/* CE_EXTENDED2 is for future extension */
#define CE_EXTENDED2 (1U << 31)
#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)
/*
* Safeguard to avoid saving wrong flags:
* - CE_EXTENDED2 won't get saved until its semantic is known
* - Bits in 0x0000FFFF have been saved in ce_flags already
* - Bits in 0x003F0000 are currently in-memory flags
*/
#if CE_EXTENDED_FLAGS & 0x803FFFFF
#error "CE_EXTENDED_FLAGS out of range"
#endif
/* Forward structure decls */
struct pathspec;
struct child_process;
struct tree;
/*
* Copy the sha1 and stat state of a cache entry from one to
* another. But we never change the name, or the hash state!
*/
static inline void copy_cache_entry(struct cache_entry *dst,
const struct cache_entry *src)
{
unsigned int state = dst->ce_flags & CE_HASHED;
int mem_pool_allocated = dst->mem_pool_allocated;
/* Don't copy hash chain and name */
memcpy(&dst->ce_stat_data, &src->ce_stat_data,
offsetof(struct cache_entry, name) -
offsetof(struct cache_entry, ce_stat_data));
/* Restore the hash state */
dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state;
/* Restore the mem_pool_allocated flag */
dst->mem_pool_allocated = mem_pool_allocated;
}
static inline unsigned create_ce_flags(unsigned stage)
{
return (stage << CE_STAGESHIFT);
}
#define ce_namelen(ce) ((ce)->ce_namelen)
#define ce_size(ce) cache_entry_size(ce_namelen(ce))
#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE)
#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE)
#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE)
#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD)
#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
static inline unsigned int create_ce_mode(unsigned int mode)
{
if (S_ISLNK(mode))
return S_IFLNK;
if (S_ISDIR(mode) || S_ISGITLINK(mode))
return S_IFGITLINK;
return S_IFREG | ce_permissions(mode);
}
static inline unsigned int ce_mode_from_stat(const struct cache_entry *ce,
unsigned int mode)
{
extern int trust_executable_bit, has_symlinks;
if (!has_symlinks && S_ISREG(mode) &&
ce && S_ISLNK(ce->ce_mode))
return ce->ce_mode;
if (!trust_executable_bit && S_ISREG(mode)) {
if (ce && S_ISREG(ce->ce_mode))
return ce->ce_mode;
return create_ce_mode(0666);
}
return create_ce_mode(mode);
}
static inline int ce_to_dtype(const struct cache_entry *ce)
{
unsigned ce_mode = ntohl(ce->ce_mode);
if (S_ISREG(ce_mode))
return DT_REG;
else if (S_ISDIR(ce_mode) || S_ISGITLINK(ce_mode))
return DT_DIR;
else if (S_ISLNK(ce_mode))
return DT_LNK;
else
return DT_UNKNOWN;
}
static inline unsigned int canon_mode(unsigned int mode)
{
if (S_ISREG(mode))
return S_IFREG | ce_permissions(mode);
if (S_ISLNK(mode))
return S_IFLNK;
if (S_ISDIR(mode))
return S_IFDIR;
return S_IFGITLINK;
}
#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
#define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
#define CE_ENTRY_CHANGED (1 << 1)
#define CE_ENTRY_REMOVED (1 << 2)
#define CE_ENTRY_ADDED (1 << 3)
#define RESOLVE_UNDO_CHANGED (1 << 4)
#define CACHE_TREE_CHANGED (1 << 5)
#define SPLIT_INDEX_ORDERED (1 << 6)
#define UNTRACKED_CHANGED (1 << 7)
#define FSMONITOR_CHANGED (1 << 8)
struct split_index;
struct untracked_cache;
struct progress;
struct index_state {
struct cache_entry **cache;
unsigned int version;
unsigned int cache_nr, cache_alloc, cache_changed;
struct string_list *resolve_undo;
struct cache_tree *cache_tree;
struct split_index *split_index;
struct cache_time timestamp;
unsigned name_hash_initialized : 1,
initialized : 1,
drop_cache_tree : 1,
updated_workdir : 1,
updated_skipworktree : 1,
fsmonitor_has_run_once : 1;
struct hashmap name_hash;
struct hashmap dir_hash;
struct object_id oid;
struct untracked_cache *untracked;
char *fsmonitor_last_update;
struct ewah_bitmap *fsmonitor_dirty;
struct mem_pool *ce_mem_pool;
struct progress *progress;
};
/* Name hashing */
int test_lazy_init_name_hash(struct index_state *istate, int try_threaded);
void add_name_hash(struct index_state *istate, struct cache_entry *ce);
void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
void free_name_hash(struct index_state *istate);
/* Cache entry creation and cleanup */
/*
* Create cache_entry intended for use in the specified index. Caller
* is responsible for discarding the cache_entry with
* `discard_cache_entry`.
*/
struct cache_entry *make_cache_entry(struct index_state *istate,
unsigned int mode,
const struct object_id *oid,
const char *path,
int stage,
unsigned int refresh_options);
struct cache_entry *make_empty_cache_entry(struct index_state *istate,
size_t name_len);
/*
* Create a cache_entry that is not intended to be added to an index.
* Caller is responsible for discarding the cache_entry
* with `discard_cache_entry`.
*/
struct cache_entry *make_transient_cache_entry(unsigned int mode,
const struct object_id *oid,
const char *path,
int stage);
struct cache_entry *make_empty_transient_cache_entry(size_t name_len);
/*
* Discard cache entry.
*/
void discard_cache_entry(struct cache_entry *ce);
/*
* Check configuration if we should perform extra validation on cache
* entries.
*/
int should_validate_cache_entries(void);
/*
* Duplicate a cache_entry. Allocate memory for the new entry from a
* memory_pool. Takes into account cache_entry fields that are meant
* for managing the underlying memory allocation of the cache_entry.
*/
struct cache_entry *dup_cache_entry(const struct cache_entry *ce, struct index_state *istate);
/*
* Validate the cache entries in the index. This is an internal
* consistency check that the cache_entry structs are allocated from
* the expected memory pool.
*/
void validate_cache_entries(const struct index_state *istate);
#ifdef USE_THE_INDEX_COMPATIBILITY_MACROS
extern struct index_state the_index;
#define active_cache (the_index.cache)
#define active_nr (the_index.cache_nr)
#define active_alloc (the_index.cache_alloc)
#define active_cache_changed (the_index.cache_changed)
#define active_cache_tree (the_index.cache_tree)
#define read_cache() repo_read_index(the_repository)
#define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir()))
#define read_cache_preload(pathspec) repo_read_index_preload(the_repository, (pathspec), 0)
#define is_cache_unborn() is_index_unborn(&the_index)
#define read_cache_unmerged() repo_read_index_unmerged(the_repository)
#define discard_cache() discard_index(&the_index)
#define unmerged_cache() unmerged_index(&the_index)
#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags))
#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags))
#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip))
#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL)
#define refresh_and_write_cache(refresh_flags, write_flags, gentle) repo_refresh_and_write_index(the_repository, (refresh_flags), (write_flags), (gentle), NULL, NULL, NULL)
#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen))
#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase))
#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
#define resolve_undo_clear() resolve_undo_clear_index(&the_index)
#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at)
#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec)
#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz))
#define hold_locked_index(lock_file, flags) repo_hold_locked_index(the_repository, (lock_file), (flags))
#endif
#define TYPE_BITS 3
/*
* Values in this enum (except those outside the 3 bit range) are part
* of pack file format. See Documentation/technical/pack-format.txt
* for more information.
*/
enum object_type {
OBJ_BAD = -1,
OBJ_NONE = 0,
OBJ_COMMIT = 1,
OBJ_TREE = 2,
OBJ_BLOB = 3,
OBJ_TAG = 4,
/* 5 for future expansion */
OBJ_OFS_DELTA = 6,
OBJ_REF_DELTA = 7,
OBJ_ANY,
OBJ_MAX
};
static inline enum object_type object_type(unsigned int mode)
{
return S_ISDIR(mode) ? OBJ_TREE :
S_ISGITLINK(mode) ? OBJ_COMMIT :
OBJ_BLOB;
}
/* Double-check local_repo_env below if you add to this list. */
#define GIT_DIR_ENVIRONMENT "GIT_DIR"
#define GIT_COMMON_DIR_ENVIRONMENT "GIT_COMMON_DIR"
#define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
#define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX"
#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
#define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
#define GIT_SHALLOW_FILE_ENVIRONMENT "GIT_SHALLOW_FILE"
#define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
#define CONFIG_ENVIRONMENT "GIT_CONFIG"
#define CONFIG_DATA_ENVIRONMENT "GIT_CONFIG_PARAMETERS"
#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE"
#define GITATTRIBUTES_FILE ".gitattributes"
#define INFOATTRIBUTES_FILE "info/attributes"
#define ATTRIBUTE_MACRO_PREFIX "[attr]"
#define GITMODULES_FILE ".gitmodules"
#define GITMODULES_INDEX ":.gitmodules"
#define GITMODULES_HEAD "HEAD:.gitmodules"
#define GIT_NOTES_REF_ENVIRONMENT "GIT_NOTES_REF"
#define GIT_NOTES_DEFAULT_REF "refs/notes/commits"
#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT "GIT_NOTES_DISPLAY_REF"
#define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
#define GIT_LITERAL_PATHSPECS_ENVIRONMENT "GIT_LITERAL_PATHSPECS"
#define GIT_GLOB_PATHSPECS_ENVIRONMENT "GIT_GLOB_PATHSPECS"
#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT "GIT_NOGLOB_PATHSPECS"
#define GIT_ICASE_PATHSPECS_ENVIRONMENT "GIT_ICASE_PATHSPECS"
#define GIT_QUARANTINE_ENVIRONMENT "GIT_QUARANTINE_PATH"
#define GIT_OPTIONAL_LOCKS_ENVIRONMENT "GIT_OPTIONAL_LOCKS"
#define GIT_TEXT_DOMAIN_DIR_ENVIRONMENT "GIT_TEXTDOMAINDIR"
/*
* Environment variable used in handshaking the wire protocol.
* Contains a colon ':' separated list of keys with optional values
* 'key[=value]'. Presence of unknown keys and values must be
* ignored.
*/
#define GIT_PROTOCOL_ENVIRONMENT "GIT_PROTOCOL"
/* HTTP header used to handshake the wire protocol */
#define GIT_PROTOCOL_HEADER "Git-Protocol"
/*
* This environment variable is expected to contain a boolean indicating
* whether we should or should not treat:
*
* GIT_DIR=foo.git git ...
*
* as if GIT_WORK_TREE=. was given. It's not expected that users will make use
* of this, but we use it internally to communicate to sub-processes that we
* are in a bare repo. If not set, defaults to true.
*/
#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
/*
* Repository-local GIT_* environment variables; these will be cleared
* when git spawns a sub-process that runs inside another repository.
* The array is NULL-terminated, which makes it easy to pass in the "env"
* parameter of a run-command invocation, or to do a simple walk.
*/
extern const char * const local_repo_env[];
void setup_git_env(const char *git_dir);
/*
* Returns true iff we have a configured git repository (either via
* setup_git_directory, or in the environment via $GIT_DIR).
*/
int have_git_dir(void);
extern int is_bare_repository_cfg;
int is_bare_repository(void);
int is_inside_git_dir(void);
extern char *git_work_tree_cfg;
int is_inside_work_tree(void);
const char *get_git_dir(void);
const char *get_git_common_dir(void);
char *get_object_directory(void);
char *get_index_file(void);
char *get_graft_file(struct repository *r);
void set_git_dir(const char *path, int make_realpath);
int get_common_dir_noenv(struct strbuf *sb, const char *gitdir);
int get_common_dir(struct strbuf *sb, const char *gitdir);
const char *get_git_namespace(void);
const char *strip_namespace(const char *namespaced_ref);
const char *get_super_prefix(void);
const char *get_git_work_tree(void);
/*
* Return true if the given path is a git directory; note that this _just_
* looks at the directory itself. If you want to know whether "foo/.git"
* is a repository, you must feed that path, not just "foo".
*/
int is_git_directory(const char *path);
/*
* Return 1 if the given path is the root of a git repository or
* submodule, else 0. Will not return 1 for bare repositories with the
* exception of creating a bare repository in "foo/.git" and calling
* is_git_repository("foo").
*
* If we run into read errors, we err on the side of saying "yes, it is",
* as we usually consider sub-repos precious, and would prefer to err on the
* side of not disrupting or deleting them.
*/
int is_nonbare_repository_dir(struct strbuf *path);
#define READ_GITFILE_ERR_STAT_FAILED 1
#define READ_GITFILE_ERR_NOT_A_FILE 2
#define READ_GITFILE_ERR_OPEN_FAILED 3
#define READ_GITFILE_ERR_READ_FAILED 4
#define READ_GITFILE_ERR_INVALID_FORMAT 5
#define READ_GITFILE_ERR_NO_PATH 6
#define READ_GITFILE_ERR_NOT_A_REPO 7
#define READ_GITFILE_ERR_TOO_LARGE 8
void read_gitfile_error_die(int error_code, const char *path, const char *dir);
const char *read_gitfile_gently(const char *path, int *return_error_code);
#define read_gitfile(path) read_gitfile_gently((path), NULL)
const char *resolve_gitdir_gently(const char *suspect, int *return_error_code);
#define resolve_gitdir(path) resolve_gitdir_gently((path), NULL)
void set_git_work_tree(const char *tree);
#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
void setup_work_tree(void);
/*
* Find the commondir and gitdir of the repository that contains the current
* working directory, without changing the working directory or other global
* state. The result is appended to commondir and gitdir. If the discovered
* gitdir does not correspond to a worktree, then 'commondir' and 'gitdir' will
* both have the same result appended to the buffer. The return value is
* either 0 upon success and non-zero if no repository was found.
*/
int discover_git_directory(struct strbuf *commondir,
struct strbuf *gitdir);
const char *setup_git_directory_gently(int *);
const char *setup_git_directory(void);
char *prefix_path(const char *prefix, int len, const char *path);
char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
/*
* Concatenate "prefix" (if len is non-zero) and "path", with no
* connecting characters (so "prefix" should end with a "/").
* Unlike prefix_path, this should be used if the named file does
* not have to interact with index entry; i.e. name of a random file
* on the filesystem.
*
* The return value is always a newly allocated string (even if the
* prefix was empty).
*/
char *prefix_filename(const char *prefix, const char *path);
int check_filename(const char *prefix, const char *name);
void verify_filename(const char *prefix,
const char *name,
int diagnose_misspelt_rev);
void verify_non_filename(const char *prefix, const char *name);
int path_inside_repo(const char *prefix, const char *path);
#define INIT_DB_QUIET 0x0001
#define INIT_DB_EXIST_OK 0x0002
int init_db(const char *git_dir, const char *real_git_dir,
const char *template_dir, int hash_algo,
const char *initial_branch, unsigned int flags);
void initialize_repository_version(int hash_algo, int reinit);
void sanitize_stdfds(void);
int daemonize(void);
#define alloc_nr(x) (((x)+16)*3/2)
/**
* Dynamically growing an array using realloc() is error prone and boring.
*
* Define your array with:
*
* - a pointer (`item`) that points at the array, initialized to `NULL`
* (although please name the variable based on its contents, not on its
* type);
*
* - an integer variable (`alloc`) that keeps track of how big the current
* allocation is, initialized to `0`;
*
* - another integer variable (`nr`) to keep track of how many elements the
* array currently has, initialized to `0`.
*
* Then before adding `n`th element to the item, call `ALLOC_GROW(item, n,
* alloc)`. This ensures that the array can hold at least `n` elements by
* calling `realloc(3)` and adjusting `alloc` variable.
*
* ------------
* sometype *item;
* size_t nr;
* size_t alloc
*
* for (i = 0; i < nr; i++)
* if (we like item[i] already)
* return;
*
* // we did not like any existing one, so add one
* ALLOC_GROW(item, nr + 1, alloc);
* item[nr++] = value you like;
* ------------
*
* You are responsible for updating the `nr` variable.
*
* If you need to specify the number of elements to allocate explicitly
* then use the macro `REALLOC_ARRAY(item, alloc)` instead of `ALLOC_GROW`.
*
* Consider using ALLOC_GROW_BY instead of ALLOC_GROW as it has some
* added niceties.
*
* DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'.
*/
#define ALLOC_GROW(x, nr, alloc) \
do { \
if ((nr) > alloc) { \
if (alloc_nr(alloc) < (nr)) \
alloc = (nr); \
else \
alloc = alloc_nr(alloc); \
REALLOC_ARRAY(x, alloc); \
} \
} while (0)
/*
* Similar to ALLOC_GROW but handles updating of the nr value and
* zeroing the bytes of the newly-grown array elements.
*
* DO NOT USE any expression with side-effect for any of the
* arguments.
*/
#define ALLOC_GROW_BY(x, nr, increase, alloc) \
do { \
if (increase) { \
size_t new_nr = nr + (increase); \
if (new_nr < nr) \
BUG("negative growth in ALLOC_GROW_BY"); \
ALLOC_GROW(x, new_nr, alloc); \
memset((x) + nr, 0, sizeof(*(x)) * (increase)); \
nr = new_nr; \
} \
} while (0)
/* Initialize and use the cache information */
struct lock_file;
void preload_index(struct index_state *index,
const struct pathspec *pathspec,
unsigned int refresh_flags);
int do_read_index(struct index_state *istate, const char *path,
int must_exist); /* for testting only! */
int read_index_from(struct index_state *, const char *path,
const char *gitdir);
int is_index_unborn(struct index_state *);
/* For use with `write_locked_index()`. */
#define COMMIT_LOCK (1 << 0)
#define SKIP_IF_UNCHANGED (1 << 1)
/*
* Write the index while holding an already-taken lock. Close the lock,
* and if `COMMIT_LOCK` is given, commit it.
*
* Unless a split index is in use, write the index into the lockfile.
*
* With a split index, write the shared index to a temporary file,
* adjust its permissions and rename it into place, then write the
* split index to the lockfile. If the temporary file for the shared
* index cannot be created, fall back to the behavior described in
* the previous paragraph.
*
* With `COMMIT_LOCK`, the lock is always committed or rolled back.
* Without it, the lock is closed, but neither committed nor rolled
* back.
*
* If `SKIP_IF_UNCHANGED` is given and the index is unchanged, nothing
* is written (and the lock is rolled back if `COMMIT_LOCK` is given).
*/
int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
int discard_index(struct index_state *);
void move_index_extensions(struct index_state *dst, struct index_state *src);
int unmerged_index(const struct index_state *);
/**
* Returns 1 if istate differs from tree, 0 otherwise. If tree is NULL,
* compares istate to HEAD. If tree is NULL and on an unborn branch,
* returns 1 if there are entries in istate, 0 otherwise. If an strbuf is
* provided, the space-separated list of files that differ will be appended
* to it.
*/
int repo_index_has_changes(struct repository *repo,
struct tree *tree,
struct strbuf *sb);
int verify_path(const char *path, unsigned mode);
int strcmp_offset(const char *s1, const char *s2, size_t *first_change);
int index_dir_exists(struct index_state *istate, const char *name, int namelen);
void adjust_dirname_case(struct index_state *istate, char *name);
struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
/*
* Searches for an entry defined by name and namelen in the given index.
* If the return value is positive (including 0) it is the position of an
* exact match. If the return value is negative, the negated value minus 1
* is the position where the entry would be inserted.
* Example: The current index consists of these files and its stages:
*
* b#0, d#0, f#1, f#3
*
* index_name_pos(&index, "a", 1) -> -1
* index_name_pos(&index, "b", 1) -> 0
* index_name_pos(&index, "c", 1) -> -2
* index_name_pos(&index, "d", 1) -> 1
* index_name_pos(&index, "e", 1) -> -3
* index_name_pos(&index, "f", 1) -> -3
* index_name_pos(&index, "g", 1) -> -5
*/
int index_name_pos(const struct index_state *, const char *name, int namelen);
/*
* Some functions return the negative complement of an insert position when a
* precise match was not found but a position was found where the entry would
* need to be inserted. This helper protects that logic from any integer
* underflow.
*/
static inline int index_pos_to_insert_pos(uintmax_t pos)
{
if (pos > INT_MAX)
die("overflow: -1 - %"PRIuMAX, pos);
return -1 - (int)pos;
}
#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
#define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
#define ADD_CACHE_JUST_APPEND 8 /* Append only; tree.c::read_tree() */
#define ADD_CACHE_NEW_ONLY 16 /* Do not replace existing ones */
#define ADD_CACHE_KEEP_CACHE_TREE 32 /* Do not invalidate cache-tree */
#define ADD_CACHE_RENORMALIZE 64 /* Pass along HASH_RENORMALIZE */
int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
/* Remove entry, return true if there are more entries to go. */
int remove_index_entry_at(struct index_state *, int pos);
void remove_marked_cache_entries(struct index_state *istate, int invalidate);
int remove_file_from_index(struct index_state *, const char *path);
#define ADD_CACHE_VERBOSE 1
#define ADD_CACHE_PRETEND 2
#define ADD_CACHE_IGNORE_ERRORS 4
#define ADD_CACHE_IGNORE_REMOVAL 8
#define ADD_CACHE_INTENT 16
/*
* These two are used to add the contents of the file at path
* to the index, marking the working tree up-to-date by storing
* the cached stat info in the resulting cache entry. A caller
* that has already run lstat(2) on the path can call
* add_to_index(), and all others can call add_file_to_index();
* the latter will do necessary lstat(2) internally before
* calling the former.
*/
int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
int add_file_to_index(struct index_state *, const char *path, int flags);
int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip);
int ce_same_name(const struct cache_entry *a, const struct cache_entry *b);
void set_object_name_for_intent_to_add_entry(struct cache_entry *ce);
int index_name_is_other(const struct index_state *, const char *, int);
void *read_blob_data_from_index(const struct index_state *, const char *, unsigned long *);
/* do stat comparison even if CE_VALID is true */
#define CE_MATCH_IGNORE_VALID 01
/* do not check the contents but report dirty on racily-clean entries */
#define CE_MATCH_RACY_IS_DIRTY 02
/* do stat comparison even if CE_SKIP_WORKTREE is true */
#define CE_MATCH_IGNORE_SKIP_WORKTREE 04
/* ignore non-existent files during stat update */
#define CE_MATCH_IGNORE_MISSING 0x08
/* enable stat refresh */
#define CE_MATCH_REFRESH 0x10
/* don't refresh_fsmonitor state or do stat comparison even if CE_FSMONITOR_VALID is true */
#define CE_MATCH_IGNORE_FSMONITOR 0X20
int is_racy_timestamp(const struct index_state *istate,
const struct cache_entry *ce);
int ie_match_stat(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
int ie_modified(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
#define HASH_WRITE_OBJECT 1
#define HASH_FORMAT_CHECK 2
#define HASH_RENORMALIZE 4
int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags);
/*
* Record to sd the data from st that we use to check whether a file
* might have changed.
*/
void fill_stat_data(struct stat_data *sd, struct stat *st);
/*
* Return 0 if st is consistent with a file not having been changed
* since sd was filled. If there are differences, return a
* combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
* INODE_CHANGED, and DATA_CHANGED.
*/
int match_stat_data(const struct stat_data *sd, struct stat *st);
int match_stat_data_racy(const struct index_state *istate,
const struct stat_data *sd, struct stat *st);
void fill_stat_cache_info(struct index_state *istate, struct cache_entry *ce, struct stat *st);
#define REFRESH_REALLY 0x0001 /* ignore_valid */
#define REFRESH_UNMERGED 0x0002 /* allow unmerged */
#define REFRESH_QUIET 0x0004 /* be quiet about it */
#define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
#define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */
#define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */
#define REFRESH_PROGRESS 0x0040 /* show progress bar if stderr is tty */
int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg);
/*
* Refresh the index and write it to disk.
*
* 'refresh_flags' is passed directly to 'refresh_index()', while
* 'COMMIT_LOCK | write_flags' is passed to 'write_locked_index()', so
* the lockfile is always either committed or rolled back.
*
* If 'gentle' is passed, errors locking the index are ignored.
*
* Return 1 if refreshing the index returns an error, -1 if writing
* the index to disk fails, 0 on success.
*
* Note that if refreshing the index returns an error, we still write
* out the index (unless locking fails).
*/
int repo_refresh_and_write_index(struct repository*, unsigned int refresh_flags, unsigned int write_flags, int gentle, const struct pathspec *, char *seen, const char *header_msg);
struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int);
void set_alternate_index_output(const char *);
extern int verify_index_checksum;
extern int verify_ce_order;
/* Environment bits from configuration mechanism */
extern int trust_executable_bit;
extern int trust_ctime;
extern int check_stat;
extern int quote_path_fully;
extern int has_symlinks;
extern int minimum_abbrev, default_abbrev;
extern int ignore_case;
extern int assume_unchanged;
extern int prefer_symlink_refs;
extern int warn_ambiguous_refs;
extern int warn_on_object_refname_ambiguity;
extern char *apply_default_whitespace;
extern char *apply_default_ignorewhitespace;
extern const char *git_attributes_file;
extern const char *git_hooks_path;
extern int zlib_compression_level;
extern int core_compression_level;
extern int pack_compression_level;
extern size_t packed_git_window_size;
extern size_t packed_git_limit;
extern size_t delta_base_cache_limit;
extern unsigned long big_file_threshold;
extern unsigned long pack_size_limit_cfg;
/*
* Accessors for the core.sharedrepository config which lazy-load the value
* from the config (if not already set). The "reset" function can be
* used to unset "set" or cached value, meaning that the value will be loaded
* fresh from the config file on the next call to get_shared_repository().
*/
void set_shared_repository(int value);
int get_shared_repository(void);
void reset_shared_repository(void);
/*
* Do replace refs need to be checked this run? This variable is
* initialized to true unless --no-replace-object is used or
* $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some
* commands that do not want replace references to be active.
*/
extern int read_replace_refs;
extern char *git_replace_ref_base;
extern int fsync_object_files;
extern int core_preload_index;
extern int precomposed_unicode;
extern int protect_hfs;
extern int protect_ntfs;
extern const char *core_fsmonitor;
extern int core_apply_sparse_checkout;
extern int core_sparse_checkout_cone;
/*
* Include broken refs in all ref iterations, which will
* generally choke dangerous operations rather than letting
* them silently proceed without taking the broken ref into
* account.
*/
extern int ref_paranoia;
/*
* Returns the boolean value of $GIT_OPTIONAL_LOCKS (or the default value).
*/
int use_optional_locks(void);
/*
* The character that begins a commented line in user-editable file
* that is subject to stripspace.
*/
extern char comment_line_char;
extern int auto_comment_line_char;
enum log_refs_config {
LOG_REFS_UNSET = -1,
LOG_REFS_NONE = 0,
LOG_REFS_NORMAL,
LOG_REFS_ALWAYS
};
extern enum log_refs_config log_all_ref_updates;
enum rebase_setup_type {
AUTOREBASE_NEVER = 0,
AUTOREBASE_LOCAL,
AUTOREBASE_REMOTE,
AUTOREBASE_ALWAYS
};