-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathfast-import.c
3350 lines (2941 loc) · 83.7 KB
/
fast-import.c
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
/*
(See Documentation/git-fast-import.txt for maintained documentation.)
Format of STDIN stream:
stream ::= cmd*;
cmd ::= new_blob
| new_commit
| new_tag
| reset_branch
| checkpoint
| progress
;
new_blob ::= 'blob' lf
mark?
file_content;
file_content ::= data;
new_commit ::= 'commit' sp ref_str lf
mark?
('author' (sp name)? sp '<' email '>' sp when lf)?
'committer' (sp name)? sp '<' email '>' sp when lf
commit_msg
('from' sp committish lf)?
('merge' sp committish lf)*
(file_change | ls)*
lf?;
commit_msg ::= data;
ls ::= 'ls' sp '"' quoted(path) '"' lf;
file_change ::= file_clr
| file_del
| file_rnm
| file_cpy
| file_obm
| file_inm;
file_clr ::= 'deleteall' lf;
file_del ::= 'D' sp path_str lf;
file_rnm ::= 'R' sp path_str sp path_str lf;
file_cpy ::= 'C' sp path_str sp path_str lf;
file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf;
file_inm ::= 'M' sp mode sp 'inline' sp path_str lf
data;
note_obm ::= 'N' sp (hexsha1 | idnum) sp committish lf;
note_inm ::= 'N' sp 'inline' sp committish lf
data;
new_tag ::= 'tag' sp tag_str lf
'from' sp committish lf
('tagger' (sp name)? sp '<' email '>' sp when lf)?
tag_msg;
tag_msg ::= data;
reset_branch ::= 'reset' sp ref_str lf
('from' sp committish lf)?
lf?;
checkpoint ::= 'checkpoint' lf
lf?;
progress ::= 'progress' sp not_lf* lf
lf?;
# note: the first idnum in a stream should be 1 and subsequent
# idnums should not have gaps between values as this will cause
# the stream parser to reserve space for the gapped values. An
# idnum can be updated in the future to a new object by issuing
# a new mark directive with the old idnum.
#
mark ::= 'mark' sp idnum lf;
data ::= (delimited_data | exact_data)
lf?;
# note: delim may be any string but must not contain lf.
# data_line may contain any data but must not be exactly
# delim.
delimited_data ::= 'data' sp '<<' delim lf
(data_line lf)*
delim lf;
# note: declen indicates the length of binary_data in bytes.
# declen does not include the lf preceding the binary data.
#
exact_data ::= 'data' sp declen lf
binary_data;
# note: quoted strings are C-style quoting supporting \c for
# common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn
# is the signed byte value in octal. Note that the only
# characters which must actually be escaped to protect the
# stream formatting is: \, " and LF. Otherwise these values
# are UTF8.
#
committish ::= (ref_str | hexsha1 | sha1exp_str | idnum);
ref_str ::= ref;
sha1exp_str ::= sha1exp;
tag_str ::= tag;
path_str ::= path | '"' quoted(path) '"' ;
mode ::= '100644' | '644'
| '100755' | '755'
| '120000'
;
declen ::= # unsigned 32 bit value, ascii base10 notation;
bigint ::= # unsigned integer value, ascii base10 notation;
binary_data ::= # file content, not interpreted;
when ::= raw_when | rfc2822_when;
raw_when ::= ts sp tz;
rfc2822_when ::= # Valid RFC 2822 date and time;
sp ::= # ASCII space character;
lf ::= # ASCII newline (LF) character;
# note: a colon (':') must precede the numerical value assigned to
# an idnum. This is to distinguish it from a ref or tag name as
# GIT does not permit ':' in ref or tag strings.
#
idnum ::= ':' bigint;
path ::= # GIT style file path, e.g. "a/b/c";
ref ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT";
tag ::= # GIT tag name, e.g. "FIREFOX_1_5";
sha1exp ::= # Any valid GIT SHA1 expression;
hexsha1 ::= # SHA1 in hexadecimal format;
# note: name and email are UTF8 strings, however name must not
# contain '<' or lf and email must not contain any of the
# following: '<', '>', lf.
#
name ::= # valid GIT author/committer name;
email ::= # valid GIT author/committer email;
ts ::= # time since the epoch in seconds, ascii base10 notation;
tz ::= # GIT style timezone;
# note: comments, ls and cat requests may appear anywhere
# in the input, except within a data command. Any form
# of the data command always escapes the related input
# from comment processing.
#
# In case it is not clear, the '#' that starts the comment
# must be the first character on that line (an lf
# preceded it).
#
cat_blob ::= 'cat-blob' sp (hexsha1 | idnum) lf;
ls_tree ::= 'ls' sp (hexsha1 | idnum) sp path_str lf;
comment ::= '#' not_lf* lf;
not_lf ::= # Any byte that is not ASCII newline (LF);
*/
#include "builtin.h"
#include "cache.h"
#include "object.h"
#include "blob.h"
#include "tree.h"
#include "commit.h"
#include "delta.h"
#include "pack.h"
#include "refs.h"
#include "csum-file.h"
#include "quote.h"
#include "exec_cmd.h"
#include "dir.h"
#define PACK_ID_BITS 16
#define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
#define DEPTH_BITS 13
#define MAX_DEPTH ((1<<DEPTH_BITS)-1)
struct object_entry {
struct pack_idx_entry idx;
struct object_entry *next;
uint32_t type : TYPE_BITS,
pack_id : PACK_ID_BITS,
depth : DEPTH_BITS;
};
struct object_entry_pool {
struct object_entry_pool *next_pool;
struct object_entry *next_free;
struct object_entry *end;
struct object_entry entries[FLEX_ARRAY]; /* more */
};
struct mark_set {
union {
struct object_entry *marked[1024];
struct mark_set *sets[1024];
} data;
unsigned int shift;
};
struct last_object {
struct strbuf data;
off_t offset;
unsigned int depth;
unsigned no_swap : 1;
};
struct mem_pool {
struct mem_pool *next_pool;
char *next_free;
char *end;
uintmax_t space[FLEX_ARRAY]; /* more */
};
struct atom_str {
struct atom_str *next_atom;
unsigned short str_len;
char str_dat[FLEX_ARRAY]; /* more */
};
struct tree_content;
struct tree_entry {
struct tree_content *tree;
struct atom_str *name;
struct tree_entry_ms {
uint16_t mode;
unsigned char sha1[20];
} versions[2];
};
struct tree_content {
unsigned int entry_capacity; /* must match avail_tree_content */
unsigned int entry_count;
unsigned int delta_depth;
struct tree_entry *entries[FLEX_ARRAY]; /* more */
};
struct avail_tree_content {
unsigned int entry_capacity; /* must match tree_content */
struct avail_tree_content *next_avail;
};
struct branch {
struct branch *table_next_branch;
struct branch *active_next_branch;
const char *name;
struct tree_entry branch_tree;
uintmax_t last_commit;
uintmax_t num_notes;
unsigned active : 1;
unsigned pack_id : PACK_ID_BITS;
unsigned char sha1[20];
};
struct tag {
struct tag *next_tag;
const char *name;
unsigned int pack_id;
unsigned char sha1[20];
};
struct hash_list {
struct hash_list *next;
unsigned char sha1[20];
};
typedef enum {
WHENSPEC_RAW = 1,
WHENSPEC_RFC2822,
WHENSPEC_NOW
} whenspec_type;
struct recent_command {
struct recent_command *prev;
struct recent_command *next;
char *buf;
};
/* Configured limits on output */
static unsigned long max_depth = 10;
static off_t max_packsize;
static int force_update;
static int pack_compression_level = Z_DEFAULT_COMPRESSION;
static int pack_compression_seen;
/* Stats and misc. counters */
static uintmax_t alloc_count;
static uintmax_t marks_set_count;
static uintmax_t object_count_by_type[1 << TYPE_BITS];
static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
static uintmax_t delta_count_by_type[1 << TYPE_BITS];
static unsigned long object_count;
static unsigned long branch_count;
static unsigned long branch_load_count;
static int failure;
static FILE *pack_edges;
static unsigned int show_stats = 1;
static int global_argc;
static const char **global_argv;
/* Memory pools */
static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
static size_t total_allocd;
static struct mem_pool *mem_pool;
/* Atom management */
static unsigned int atom_table_sz = 4451;
static unsigned int atom_cnt;
static struct atom_str **atom_table;
/* The .pack file being generated */
static struct pack_idx_option pack_idx_opts;
static unsigned int pack_id;
static struct sha1file *pack_file;
static struct packed_git *pack_data;
static struct packed_git **all_packs;
static off_t pack_size;
/* Table of objects we've written. */
static unsigned int object_entry_alloc = 5000;
static struct object_entry_pool *blocks;
static struct object_entry *object_table[1 << 16];
static struct mark_set *marks;
static const char *export_marks_file;
static const char *import_marks_file;
static int import_marks_file_from_stream;
static int import_marks_file_ignore_missing;
static int relative_marks_paths;
/* Our last blob */
static struct last_object last_blob = { STRBUF_INIT, 0, 0, 0 };
/* Tree management */
static unsigned int tree_entry_alloc = 1000;
static void *avail_tree_entry;
static unsigned int avail_tree_table_sz = 100;
static struct avail_tree_content **avail_tree_table;
static struct strbuf old_tree = STRBUF_INIT;
static struct strbuf new_tree = STRBUF_INIT;
/* Branch data */
static unsigned long max_active_branches = 5;
static unsigned long cur_active_branches;
static unsigned long branch_table_sz = 1039;
static struct branch **branch_table;
static struct branch *active_branches;
/* Tag data */
static struct tag *first_tag;
static struct tag *last_tag;
/* Input stream parsing */
static whenspec_type whenspec = WHENSPEC_RAW;
static struct strbuf command_buf = STRBUF_INIT;
static int unread_command_buf;
static struct recent_command cmd_hist = {&cmd_hist, &cmd_hist, NULL};
static struct recent_command *cmd_tail = &cmd_hist;
static struct recent_command *rc_free;
static unsigned int cmd_save = 100;
static uintmax_t next_mark;
static struct strbuf new_data = STRBUF_INIT;
static int seen_data_command;
/* Signal handling */
static volatile sig_atomic_t checkpoint_requested;
/* Where to write output of cat-blob commands */
static int cat_blob_fd = STDOUT_FILENO;
static void parse_argv(void);
static void parse_cat_blob(void);
static void parse_ls(struct branch *b);
static void write_branch_report(FILE *rpt, struct branch *b)
{
fprintf(rpt, "%s:\n", b->name);
fprintf(rpt, " status :");
if (b->active)
fputs(" active", rpt);
if (b->branch_tree.tree)
fputs(" loaded", rpt);
if (is_null_sha1(b->branch_tree.versions[1].sha1))
fputs(" dirty", rpt);
fputc('\n', rpt);
fprintf(rpt, " tip commit : %s\n", sha1_to_hex(b->sha1));
fprintf(rpt, " old tree : %s\n", sha1_to_hex(b->branch_tree.versions[0].sha1));
fprintf(rpt, " cur tree : %s\n", sha1_to_hex(b->branch_tree.versions[1].sha1));
fprintf(rpt, " commit clock: %" PRIuMAX "\n", b->last_commit);
fputs(" last pack : ", rpt);
if (b->pack_id < MAX_PACK_ID)
fprintf(rpt, "%u", b->pack_id);
fputc('\n', rpt);
fputc('\n', rpt);
}
static void dump_marks_helper(FILE *, uintmax_t, struct mark_set *);
static void write_crash_report(const char *err)
{
char *loc = git_path("fast_import_crash_%"PRIuMAX, (uintmax_t) getpid());
FILE *rpt = fopen(loc, "w");
struct branch *b;
unsigned long lu;
struct recent_command *rc;
if (!rpt) {
error("can't write crash report %s: %s", loc, strerror(errno));
return;
}
fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
fprintf(rpt, "fast-import crash report:\n");
fprintf(rpt, " fast-import process: %"PRIuMAX"\n", (uintmax_t) getpid());
fprintf(rpt, " parent process : %"PRIuMAX"\n", (uintmax_t) getppid());
fprintf(rpt, " at %s\n", show_date(time(NULL), 0, DATE_LOCAL));
fputc('\n', rpt);
fputs("fatal: ", rpt);
fputs(err, rpt);
fputc('\n', rpt);
fputc('\n', rpt);
fputs("Most Recent Commands Before Crash\n", rpt);
fputs("---------------------------------\n", rpt);
for (rc = cmd_hist.next; rc != &cmd_hist; rc = rc->next) {
if (rc->next == &cmd_hist)
fputs("* ", rpt);
else
fputs(" ", rpt);
fputs(rc->buf, rpt);
fputc('\n', rpt);
}
fputc('\n', rpt);
fputs("Active Branch LRU\n", rpt);
fputs("-----------------\n", rpt);
fprintf(rpt, " active_branches = %lu cur, %lu max\n",
cur_active_branches,
max_active_branches);
fputc('\n', rpt);
fputs(" pos clock name\n", rpt);
fputs(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n", rpt);
for (b = active_branches, lu = 0; b; b = b->active_next_branch)
fprintf(rpt, " %2lu) %6" PRIuMAX" %s\n",
++lu, b->last_commit, b->name);
fputc('\n', rpt);
fputs("Inactive Branches\n", rpt);
fputs("-----------------\n", rpt);
for (lu = 0; lu < branch_table_sz; lu++) {
for (b = branch_table[lu]; b; b = b->table_next_branch)
write_branch_report(rpt, b);
}
if (first_tag) {
struct tag *tg;
fputc('\n', rpt);
fputs("Annotated Tags\n", rpt);
fputs("--------------\n", rpt);
for (tg = first_tag; tg; tg = tg->next_tag) {
fputs(sha1_to_hex(tg->sha1), rpt);
fputc(' ', rpt);
fputs(tg->name, rpt);
fputc('\n', rpt);
}
}
fputc('\n', rpt);
fputs("Marks\n", rpt);
fputs("-----\n", rpt);
if (export_marks_file)
fprintf(rpt, " exported to %s\n", export_marks_file);
else
dump_marks_helper(rpt, 0, marks);
fputc('\n', rpt);
fputs("-------------------\n", rpt);
fputs("END OF CRASH REPORT\n", rpt);
fclose(rpt);
}
static void end_packfile(void);
static void unkeep_all_packs(void);
static void dump_marks(void);
static NORETURN void die_nicely(const char *err, va_list params)
{
static int zombie;
char message[2 * PATH_MAX];
vsnprintf(message, sizeof(message), err, params);
fputs("fatal: ", stderr);
fputs(message, stderr);
fputc('\n', stderr);
if (!zombie) {
zombie = 1;
write_crash_report(message);
end_packfile();
unkeep_all_packs();
dump_marks();
}
exit(128);
}
#ifndef SIGUSR1 /* Windows, for example */
static void set_checkpoint_signal(void)
{
}
#else
static void checkpoint_signal(int signo)
{
checkpoint_requested = 1;
}
static void set_checkpoint_signal(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = checkpoint_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGUSR1, &sa, NULL);
}
#endif
static void alloc_objects(unsigned int cnt)
{
struct object_entry_pool *b;
b = xmalloc(sizeof(struct object_entry_pool)
+ cnt * sizeof(struct object_entry));
b->next_pool = blocks;
b->next_free = b->entries;
b->end = b->entries + cnt;
blocks = b;
alloc_count += cnt;
}
static struct object_entry *new_object(unsigned char *sha1)
{
struct object_entry *e;
if (blocks->next_free == blocks->end)
alloc_objects(object_entry_alloc);
e = blocks->next_free++;
hashcpy(e->idx.sha1, sha1);
return e;
}
static struct object_entry *find_object(unsigned char *sha1)
{
unsigned int h = sha1[0] << 8 | sha1[1];
struct object_entry *e;
for (e = object_table[h]; e; e = e->next)
if (!hashcmp(sha1, e->idx.sha1))
return e;
return NULL;
}
static struct object_entry *insert_object(unsigned char *sha1)
{
unsigned int h = sha1[0] << 8 | sha1[1];
struct object_entry *e = object_table[h];
while (e) {
if (!hashcmp(sha1, e->idx.sha1))
return e;
e = e->next;
}
e = new_object(sha1);
e->next = object_table[h];
e->idx.offset = 0;
object_table[h] = e;
return e;
}
static unsigned int hc_str(const char *s, size_t len)
{
unsigned int r = 0;
while (len-- > 0)
r = r * 31 + *s++;
return r;
}
static void *pool_alloc(size_t len)
{
struct mem_pool *p;
void *r;
/* round up to a 'uintmax_t' alignment */
if (len & (sizeof(uintmax_t) - 1))
len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
for (p = mem_pool; p; p = p->next_pool)
if ((p->end - p->next_free >= len))
break;
if (!p) {
if (len >= (mem_pool_alloc/2)) {
total_allocd += len;
return xmalloc(len);
}
total_allocd += sizeof(struct mem_pool) + mem_pool_alloc;
p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc);
p->next_pool = mem_pool;
p->next_free = (char *) p->space;
p->end = p->next_free + mem_pool_alloc;
mem_pool = p;
}
r = p->next_free;
p->next_free += len;
return r;
}
static void *pool_calloc(size_t count, size_t size)
{
size_t len = count * size;
void *r = pool_alloc(len);
memset(r, 0, len);
return r;
}
static char *pool_strdup(const char *s)
{
char *r = pool_alloc(strlen(s) + 1);
strcpy(r, s);
return r;
}
static void insert_mark(uintmax_t idnum, struct object_entry *oe)
{
struct mark_set *s = marks;
while ((idnum >> s->shift) >= 1024) {
s = pool_calloc(1, sizeof(struct mark_set));
s->shift = marks->shift + 10;
s->data.sets[0] = marks;
marks = s;
}
while (s->shift) {
uintmax_t i = idnum >> s->shift;
idnum -= i << s->shift;
if (!s->data.sets[i]) {
s->data.sets[i] = pool_calloc(1, sizeof(struct mark_set));
s->data.sets[i]->shift = s->shift - 10;
}
s = s->data.sets[i];
}
if (!s->data.marked[idnum])
marks_set_count++;
s->data.marked[idnum] = oe;
}
static struct object_entry *find_mark(uintmax_t idnum)
{
uintmax_t orig_idnum = idnum;
struct mark_set *s = marks;
struct object_entry *oe = NULL;
if ((idnum >> s->shift) < 1024) {
while (s && s->shift) {
uintmax_t i = idnum >> s->shift;
idnum -= i << s->shift;
s = s->data.sets[i];
}
if (s)
oe = s->data.marked[idnum];
}
if (!oe)
die("mark :%" PRIuMAX " not declared", orig_idnum);
return oe;
}
static struct atom_str *to_atom(const char *s, unsigned short len)
{
unsigned int hc = hc_str(s, len) % atom_table_sz;
struct atom_str *c;
for (c = atom_table[hc]; c; c = c->next_atom)
if (c->str_len == len && !strncmp(s, c->str_dat, len))
return c;
c = pool_alloc(sizeof(struct atom_str) + len + 1);
c->str_len = len;
strncpy(c->str_dat, s, len);
c->str_dat[len] = 0;
c->next_atom = atom_table[hc];
atom_table[hc] = c;
atom_cnt++;
return c;
}
static struct branch *lookup_branch(const char *name)
{
unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
struct branch *b;
for (b = branch_table[hc]; b; b = b->table_next_branch)
if (!strcmp(name, b->name))
return b;
return NULL;
}
static struct branch *new_branch(const char *name)
{
unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
struct branch *b = lookup_branch(name);
if (b)
die("Invalid attempt to create duplicate branch: %s", name);
switch (check_ref_format(name)) {
case 0: break; /* its valid */
case CHECK_REF_FORMAT_ONELEVEL:
break; /* valid, but too few '/', allow anyway */
default:
die("Branch name doesn't conform to GIT standards: %s", name);
}
b = pool_calloc(1, sizeof(struct branch));
b->name = pool_strdup(name);
b->table_next_branch = branch_table[hc];
b->branch_tree.versions[0].mode = S_IFDIR;
b->branch_tree.versions[1].mode = S_IFDIR;
b->num_notes = 0;
b->active = 0;
b->pack_id = MAX_PACK_ID;
branch_table[hc] = b;
branch_count++;
return b;
}
static unsigned int hc_entries(unsigned int cnt)
{
cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
}
static struct tree_content *new_tree_content(unsigned int cnt)
{
struct avail_tree_content *f, *l = NULL;
struct tree_content *t;
unsigned int hc = hc_entries(cnt);
for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
if (f->entry_capacity >= cnt)
break;
if (f) {
if (l)
l->next_avail = f->next_avail;
else
avail_tree_table[hc] = f->next_avail;
} else {
cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
f = pool_alloc(sizeof(*t) + sizeof(t->entries[0]) * cnt);
f->entry_capacity = cnt;
}
t = (struct tree_content*)f;
t->entry_count = 0;
t->delta_depth = 0;
return t;
}
static void release_tree_entry(struct tree_entry *e);
static void release_tree_content(struct tree_content *t)
{
struct avail_tree_content *f = (struct avail_tree_content*)t;
unsigned int hc = hc_entries(f->entry_capacity);
f->next_avail = avail_tree_table[hc];
avail_tree_table[hc] = f;
}
static void release_tree_content_recursive(struct tree_content *t)
{
unsigned int i;
for (i = 0; i < t->entry_count; i++)
release_tree_entry(t->entries[i]);
release_tree_content(t);
}
static struct tree_content *grow_tree_content(
struct tree_content *t,
int amt)
{
struct tree_content *r = new_tree_content(t->entry_count + amt);
r->entry_count = t->entry_count;
r->delta_depth = t->delta_depth;
memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0]));
release_tree_content(t);
return r;
}
static struct tree_entry *new_tree_entry(void)
{
struct tree_entry *e;
if (!avail_tree_entry) {
unsigned int n = tree_entry_alloc;
total_allocd += n * sizeof(struct tree_entry);
avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry));
while (n-- > 1) {
*((void**)e) = e + 1;
e++;
}
*((void**)e) = NULL;
}
e = avail_tree_entry;
avail_tree_entry = *((void**)e);
return e;
}
static void release_tree_entry(struct tree_entry *e)
{
if (e->tree)
release_tree_content_recursive(e->tree);
*((void**)e) = avail_tree_entry;
avail_tree_entry = e;
}
static struct tree_content *dup_tree_content(struct tree_content *s)
{
struct tree_content *d;
struct tree_entry *a, *b;
unsigned int i;
if (!s)
return NULL;
d = new_tree_content(s->entry_count);
for (i = 0; i < s->entry_count; i++) {
a = s->entries[i];
b = new_tree_entry();
memcpy(b, a, sizeof(*a));
if (a->tree && is_null_sha1(b->versions[1].sha1))
b->tree = dup_tree_content(a->tree);
else
b->tree = NULL;
d->entries[i] = b;
}
d->entry_count = s->entry_count;
d->delta_depth = s->delta_depth;
return d;
}
static void start_packfile(void)
{
static char tmpfile[PATH_MAX];
struct packed_git *p;
struct pack_header hdr;
int pack_fd;
pack_fd = odb_mkstemp(tmpfile, sizeof(tmpfile),
"pack/tmp_pack_XXXXXX");
p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
strcpy(p->pack_name, tmpfile);
p->pack_fd = pack_fd;
p->do_not_close = 1;
pack_file = sha1fd(pack_fd, p->pack_name);
hdr.hdr_signature = htonl(PACK_SIGNATURE);
hdr.hdr_version = htonl(2);
hdr.hdr_entries = 0;
sha1write(pack_file, &hdr, sizeof(hdr));
pack_data = p;
pack_size = sizeof(hdr);
object_count = 0;
all_packs = xrealloc(all_packs, sizeof(*all_packs) * (pack_id + 1));
all_packs[pack_id] = p;
}
static const char *create_index(void)
{
const char *tmpfile;
struct pack_idx_entry **idx, **c, **last;
struct object_entry *e;
struct object_entry_pool *o;
/* Build the table of object IDs. */
idx = xmalloc(object_count * sizeof(*idx));
c = idx;
for (o = blocks; o; o = o->next_pool)
for (e = o->next_free; e-- != o->entries;)
if (pack_id == e->pack_id)
*c++ = &e->idx;
last = idx + object_count;
if (c != last)
die("internal consistency error creating the index");
tmpfile = write_idx_file(NULL, idx, object_count, &pack_idx_opts, pack_data->sha1);
free(idx);
return tmpfile;
}
static char *keep_pack(const char *curr_index_name)
{
static char name[PATH_MAX];
static const char *keep_msg = "fast-import";
int keep_fd;
keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1);
if (keep_fd < 0)
die_errno("cannot create keep file");
write_or_die(keep_fd, keep_msg, strlen(keep_msg));
if (close(keep_fd))
die_errno("failed to write keep file");
snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
get_object_directory(), sha1_to_hex(pack_data->sha1));
if (move_temp_to_file(pack_data->pack_name, name))
die("cannot store pack file");
snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
get_object_directory(), sha1_to_hex(pack_data->sha1));
if (move_temp_to_file(curr_index_name, name))
die("cannot store index file");
free((void *)curr_index_name);
return name;
}
static void unkeep_all_packs(void)
{
static char name[PATH_MAX];
int k;
for (k = 0; k < pack_id; k++) {
struct packed_git *p = all_packs[k];
snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
get_object_directory(), sha1_to_hex(p->sha1));
unlink_or_warn(name);
}
}
static void end_packfile(void)
{
struct packed_git *old_p = pack_data, *new_p;
clear_delta_base_cache();
if (object_count) {
unsigned char cur_pack_sha1[20];
char *idx_name;
int i;
struct branch *b;
struct tag *t;
close_pack_windows(pack_data);
sha1close(pack_file, cur_pack_sha1, 0);
fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1,
pack_data->pack_name, object_count,
cur_pack_sha1, pack_size);
close(pack_data->pack_fd);
idx_name = keep_pack(create_index());
/* Register the packfile with core git's machinery. */
new_p = add_packed_git(idx_name, strlen(idx_name), 1);
if (!new_p)
die("core git rejected index %s", idx_name);
all_packs[pack_id] = new_p;
install_packed_git(new_p);
/* Print the boundary */
if (pack_edges) {
fprintf(pack_edges, "%s:", new_p->pack_name);
for (i = 0; i < branch_table_sz; i++) {
for (b = branch_table[i]; b; b = b->table_next_branch) {
if (b->pack_id == pack_id)
fprintf(pack_edges, " %s", sha1_to_hex(b->sha1));
}
}
for (t = first_tag; t; t = t->next_tag) {
if (t->pack_id == pack_id)
fprintf(pack_edges, " %s", sha1_to_hex(t->sha1));
}
fputc('\n', pack_edges);
fflush(pack_edges);
}
pack_id++;
}
else {
close(old_p->pack_fd);
unlink_or_warn(old_p->pack_name);
}
free(old_p);
/* We can't carry a delta across packfiles. */
strbuf_release(&last_blob.data);
last_blob.offset = 0;
last_blob.depth = 0;
}