pack: convert struct pack_idx_entry to struct object_id
[git/git.git] / builtin / index-pack.c
CommitLineData
2ad9d4cb 1#include "builtin.h"
9cf6d335
SV
2#include "delta.h"
3#include "pack.h"
4#include "csum-file.h"
8e440259
PE
5#include "blob.h"
6#include "commit.h"
7#include "tag.h"
8#include "tree.h"
96a02f8f 9#include "progress.h"
0153be05 10#include "fsck.h"
2fb3f6db 11#include "exec_cmd.h"
4614043c 12#include "streaming.h"
b8a2486f 13#include "thread-utils.h"
9cf6d335
SV
14
15static const char index_pack_usage[] =
e337a04d 16"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
9cf6d335 17
9cba13ca 18struct object_entry {
aa7e44bf 19 struct pack_idx_entry idx;
2d477051 20 unsigned long size;
41730576
NTND
21 unsigned char hdr_size;
22 signed char type;
23 signed char real_type;
9cf6d335
SV
24};
25
41730576 26struct object_stat {
38a45561
JH
27 unsigned delta_depth;
28 int base_object_no;
53dda6ff
NP
29};
30
f41aebd4 31struct base_data {
4a438cab
SP
32 struct base_data *base;
33 struct base_data *child;
03993e13 34 struct object_entry *obj;
f41aebd4
SP
35 void *data;
36 unsigned long size;
2baad220
NTND
37 int ref_first, ref_last;
38 int ofs_first, ofs_last;
f41aebd4
SP
39};
40
b8a2486f
NTND
41struct thread_local {
42#ifndef NO_PTHREADS
43 pthread_t thread;
44#endif
45 struct base_data *base_cache;
46 size_t base_cache_used;
39539495 47 int pack_fd;
b8a2486f
NTND
48};
49
0153be05
MK
50#define FLAG_LINK (1u<<20)
51#define FLAG_CHECKED (1u<<21)
52
c6458e60
NTND
53struct ofs_delta_entry {
54 off_t offset;
55 int obj_no;
56};
57
58struct ref_delta_entry {
59 unsigned char sha1[20];
636171cb 60 int obj_no;
9cf6d335
SV
61};
62
9cf6d335 63static struct object_entry *objects;
41730576 64static struct object_stat *obj_stat;
c6458e60
NTND
65static struct ofs_delta_entry *ofs_deltas;
66static struct ref_delta_entry *ref_deltas;
b8a2486f 67static struct thread_local nothread_data;
9cf6d335 68static int nr_objects;
c6458e60
NTND
69static int nr_ofs_deltas;
70static int nr_ref_deltas;
71static int ref_deltas_alloc;
636171cb 72static int nr_resolved_deltas;
b8a2486f 73static int nr_threads;
9cf6d335 74
e42797f5 75static int from_stdin;
0153be05 76static int strict;
c6807a40 77static int do_fsck_object;
22410549 78static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
3c9af366 79static int verbose;
e376f17f 80static int show_resolving_progress;
3aba2fdd 81static int show_stat;
c6807a40 82static int check_self_contained_and_connected;
3c9af366 83
dc6a0757 84static struct progress *progress;
e42797f5 85
2d477051
NP
86/* We always read in 4kB chunks. */
87static unsigned char input_buffer[4096];
d7dd0223
NP
88static unsigned int input_offset, input_len;
89static off_t consumed_bytes;
411481be 90static off_t max_input_size;
d1a0ed18 91static unsigned deepest_delta;
9126f009 92static git_SHA_CTX input_ctx;
ee5743ce 93static uint32_t input_crc32;
39539495
NTND
94static int input_fd, output_fd;
95static const char *curr_pack;
2d477051 96
b8a2486f
NTND
97#ifndef NO_PTHREADS
98
99static struct thread_local *thread_data;
100static int nr_dispatched;
101static int threads_active;
102
103static pthread_mutex_t read_mutex;
104#define read_lock() lock_mutex(&read_mutex)
105#define read_unlock() unlock_mutex(&read_mutex)
106
107static pthread_mutex_t counter_mutex;
108#define counter_lock() lock_mutex(&counter_mutex)
109#define counter_unlock() unlock_mutex(&counter_mutex)
110
111static pthread_mutex_t work_mutex;
112#define work_lock() lock_mutex(&work_mutex)
113#define work_unlock() unlock_mutex(&work_mutex)
114
3aba2fdd
NTND
115static pthread_mutex_t deepest_delta_mutex;
116#define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
117#define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
118
ab791dd1
JK
119static pthread_mutex_t type_cas_mutex;
120#define type_cas_lock() lock_mutex(&type_cas_mutex)
121#define type_cas_unlock() unlock_mutex(&type_cas_mutex)
122
b8a2486f
NTND
123static pthread_key_t key;
124
125static inline void lock_mutex(pthread_mutex_t *mutex)
126{
127 if (threads_active)
128 pthread_mutex_lock(mutex);
129}
130
131static inline void unlock_mutex(pthread_mutex_t *mutex)
132{
133 if (threads_active)
134 pthread_mutex_unlock(mutex);
135}
136
137/*
138 * Mutex and conditional variable can't be statically-initialized on Windows.
139 */
140static void init_thread(void)
141{
39539495 142 int i;
b8a2486f
NTND
143 init_recursive_mutex(&read_mutex);
144 pthread_mutex_init(&counter_mutex, NULL);
145 pthread_mutex_init(&work_mutex, NULL);
ab791dd1 146 pthread_mutex_init(&type_cas_mutex, NULL);
3aba2fdd
NTND
147 if (show_stat)
148 pthread_mutex_init(&deepest_delta_mutex, NULL);
b8a2486f
NTND
149 pthread_key_create(&key, NULL);
150 thread_data = xcalloc(nr_threads, sizeof(*thread_data));
39539495
NTND
151 for (i = 0; i < nr_threads; i++) {
152 thread_data[i].pack_fd = open(curr_pack, O_RDONLY);
153 if (thread_data[i].pack_fd == -1)
154 die_errno(_("unable to open %s"), curr_pack);
155 }
156
b8a2486f
NTND
157 threads_active = 1;
158}
159
160static void cleanup_thread(void)
161{
39539495 162 int i;
b8a2486f
NTND
163 if (!threads_active)
164 return;
165 threads_active = 0;
166 pthread_mutex_destroy(&read_mutex);
167 pthread_mutex_destroy(&counter_mutex);
168 pthread_mutex_destroy(&work_mutex);
ab791dd1 169 pthread_mutex_destroy(&type_cas_mutex);
3aba2fdd
NTND
170 if (show_stat)
171 pthread_mutex_destroy(&deepest_delta_mutex);
39539495
NTND
172 for (i = 0; i < nr_threads; i++)
173 close(thread_data[i].pack_fd);
b8a2486f
NTND
174 pthread_key_delete(key);
175 free(thread_data);
176}
177
178#else
179
180#define read_lock()
181#define read_unlock()
182
183#define counter_lock()
184#define counter_unlock()
185
186#define work_lock()
187#define work_unlock()
188
3aba2fdd
NTND
189#define deepest_delta_lock()
190#define deepest_delta_unlock()
191
e0e21283
EB
192#define type_cas_lock()
193#define type_cas_unlock()
194
b8a2486f
NTND
195#endif
196
197
22410549 198static int mark_link(struct object *obj, int type, void *data, struct fsck_options *options)
0153be05
MK
199{
200 if (!obj)
201 return -1;
202
203 if (type != OBJ_ANY && obj->type != type)
f2fd0760 204 die(_("object type mismatch at %s"), oid_to_hex(&obj->oid));
0153be05
MK
205
206 obj->flags |= FLAG_LINK;
207 return 0;
208}
209
210/* The content of each linked object must have been checked
211 or it must be already present in the object database */
c6807a40 212static unsigned check_object(struct object *obj)
0153be05
MK
213{
214 if (!obj)
c6807a40 215 return 0;
0153be05
MK
216
217 if (!(obj->flags & FLAG_LINK))
c6807a40 218 return 0;
0153be05
MK
219
220 if (!(obj->flags & FLAG_CHECKED)) {
221 unsigned long size;
ed1c9977 222 int type = sha1_object_info(obj->oid.hash, &size);
77583e77
JK
223 if (type <= 0)
224 die(_("did not receive expected object %s"),
f2fd0760 225 oid_to_hex(&obj->oid));
77583e77
JK
226 if (type != obj->type)
227 die(_("object %s: expected type %s, found %s"),
f2fd0760 228 oid_to_hex(&obj->oid),
77583e77 229 typename(obj->type), typename(type));
0153be05 230 obj->flags |= FLAG_CHECKED;
c6807a40 231 return 1;
0153be05 232 }
c6807a40
NTND
233
234 return 0;
0153be05
MK
235}
236
c6807a40 237static unsigned check_objects(void)
0153be05 238{
c6807a40 239 unsigned i, max, foreign_nr = 0;
0153be05
MK
240
241 max = get_max_object_index();
242 for (i = 0; i < max; i++)
c6807a40
NTND
243 foreign_nr += check_object(get_indexed_object(i));
244 return foreign_nr;
0153be05
MK
245}
246
247
636171cb 248/* Discard current buffer used content. */
a6e8a767 249static void flush(void)
636171cb
NP
250{
251 if (input_offset) {
252 if (output_fd >= 0)
253 write_or_die(output_fd, input_buffer, input_offset);
9126f009 254 git_SHA1_Update(&input_ctx, input_buffer, input_offset);
554a2636 255 memmove(input_buffer, input_buffer + input_offset, input_len);
636171cb
NP
256 input_offset = 0;
257 }
258}
259
2d477051
NP
260/*
261 * Make sure at least "min" bytes are available in the buffer, and
262 * return the pointer to the buffer.
263 */
b89c4e93 264static void *fill(int min)
9cf6d335 265{
2d477051
NP
266 if (min <= input_len)
267 return input_buffer + input_offset;
268 if (min > sizeof(input_buffer))
c2b97ecf
NTND
269 die(Q_("cannot fill %d byte",
270 "cannot fill %d bytes",
271 min),
272 min);
636171cb 273 flush();
2d477051 274 do {
8a912bcb 275 ssize_t ret = xread(input_fd, input_buffer + input_len,
2d477051
NP
276 sizeof(input_buffer) - input_len);
277 if (ret <= 0) {
278 if (!ret)
c2b97ecf
NTND
279 die(_("early EOF"));
280 die_errno(_("read error on input"));
2d477051
NP
281 }
282 input_len += ret;
218558af
NP
283 if (from_stdin)
284 display_throughput(progress, consumed_bytes + input_len);
2d477051
NP
285 } while (input_len < min);
286 return input_buffer;
287}
288
289static void use(int bytes)
290{
291 if (bytes > input_len)
c2b97ecf 292 die(_("used more bytes than were available"));
ee5743ce 293 input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
2d477051
NP
294 input_len -= bytes;
295 input_offset += bytes;
d7dd0223
NP
296
297 /* make sure off_t is sufficiently large not to wrap */
c03c8315 298 if (signed_add_overflows(consumed_bytes, bytes))
c2b97ecf 299 die(_("pack too large for current definition of off_t"));
2d477051 300 consumed_bytes += bytes;
411481be
JK
301 if (max_input_size && consumed_bytes > max_input_size)
302 die(_("pack exceeds maximum allowed size"));
2d477051 303}
9cf6d335 304
3bb72562 305static const char *open_pack_file(const char *pack_name)
2d477051 306{
e42797f5
NP
307 if (from_stdin) {
308 input_fd = 0;
309 if (!pack_name) {
594fa999
JK
310 struct strbuf tmp_file = STRBUF_INIT;
311 output_fd = odb_mkstemp(&tmp_file,
6e180cdc 312 "pack/tmp_pack_XXXXXX");
594fa999 313 pack_name = strbuf_detach(&tmp_file, NULL);
892e723a 314 } else {
e42797f5 315 output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
892e723a
JK
316 if (output_fd < 0)
317 die_errno(_("unable to create '%s'"), pack_name);
318 }
39539495 319 nothread_data.pack_fd = output_fd;
e42797f5
NP
320 } else {
321 input_fd = open(pack_name, O_RDONLY);
322 if (input_fd < 0)
c2b97ecf 323 die_errno(_("cannot open packfile '%s'"), pack_name);
e42797f5 324 output_fd = -1;
39539495 325 nothread_data.pack_fd = input_fd;
e42797f5 326 }
9126f009 327 git_SHA1_Init(&input_ctx);
e42797f5 328 return pack_name;
9cf6d335
SV
329}
330
331static void parse_pack_header(void)
332{
2d477051 333 struct pack_header *hdr = fill(sizeof(struct pack_header));
9cf6d335
SV
334
335 /* Header consistency check */
9cf6d335 336 if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
c2b97ecf 337 die(_("pack signature mismatch"));
d60fc1c8 338 if (!pack_version_ok(hdr->hdr_version))
f350df42 339 die(_("pack version %"PRIu32" unsupported"),
6e1c2344 340 ntohl(hdr->hdr_version));
9cf6d335
SV
341
342 nr_objects = ntohl(hdr->hdr_entries);
2d477051 343 use(sizeof(struct pack_header));
9cf6d335
SV
344}
345
fd3e6747 346static NORETURN void bad_object(off_t offset, const char *format,
a4f3131c 347 ...) __attribute__((format (printf, 2, 3)));
9cf6d335 348
fd3e6747 349static NORETURN void bad_object(off_t offset, const char *format, ...)
9cf6d335
SV
350{
351 va_list params;
352 char buf[1024];
353
354 va_start(params, format);
355 vsnprintf(buf, sizeof(buf), format, params);
356 va_end(params);
fd3e6747
NTND
357 die(_("pack has bad object at offset %"PRIuMAX": %s"),
358 (uintmax_t)offset, buf);
9cf6d335
SV
359}
360
b8a2486f
NTND
361static inline struct thread_local *get_thread_data(void)
362{
363#ifndef NO_PTHREADS
364 if (threads_active)
365 return pthread_getspecific(key);
366 assert(!threads_active &&
367 "This should only be reached when all threads are gone");
368#endif
369 return &nothread_data;
370}
371
372#ifndef NO_PTHREADS
373static void set_thread_data(struct thread_local *data)
374{
375 if (threads_active)
376 pthread_setspecific(key, data);
377}
378#endif
379
2baad220
NTND
380static struct base_data *alloc_base_data(void)
381{
51a60f5b 382 struct base_data *base = xcalloc(1, sizeof(struct base_data));
2baad220
NTND
383 base->ref_last = -1;
384 base->ofs_last = -1;
385 return base;
386}
387
6a87ed97
NP
388static void free_base_data(struct base_data *c)
389{
390 if (c->data) {
391 free(c->data);
392 c->data = NULL;
b8a2486f 393 get_thread_data()->base_cache_used -= c->size;
6a87ed97
NP
394 }
395}
396
92392b4a
SP
397static void prune_base_data(struct base_data *retain)
398{
8e24cbae 399 struct base_data *b;
b8a2486f
NTND
400 struct thread_local *data = get_thread_data();
401 for (b = data->base_cache;
402 data->base_cache_used > delta_base_cache_limit && b;
92392b4a 403 b = b->child) {
6a87ed97
NP
404 if (b->data && b != retain)
405 free_base_data(b);
92392b4a
SP
406 }
407}
408
4a438cab
SP
409static void link_base_data(struct base_data *base, struct base_data *c)
410{
411 if (base)
412 base->child = c;
413 else
b8a2486f 414 get_thread_data()->base_cache = c;
4a438cab
SP
415
416 c->base = base;
417 c->child = NULL;
9441b61d 418 if (c->data)
b8a2486f 419 get_thread_data()->base_cache_used += c->size;
92392b4a 420 prune_base_data(c);
4a438cab
SP
421}
422
423static void unlink_base_data(struct base_data *c)
424{
425 struct base_data *base = c->base;
426 if (base)
427 base->child = NULL;
428 else
b8a2486f 429 get_thread_data()->base_cache = NULL;
6a87ed97 430 free_base_data(c);
4a438cab
SP
431}
432
681b07de
NTND
433static int is_delta_type(enum object_type type)
434{
435 return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
436}
437
da49a7da 438static void *unpack_entry_data(off_t offset, unsigned long size,
681b07de 439 enum object_type type, unsigned char *sha1)
9cf6d335 440{
9ec2dde9 441 static char fixed_buf[8192];
7ce4721a 442 int status;
ef49a7a0 443 git_zstream stream;
9ec2dde9 444 void *buf;
681b07de
NTND
445 git_SHA_CTX c;
446 char hdr[32];
447 int hdrlen;
448
449 if (!is_delta_type(type)) {
ef1286d3 450 hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), size) + 1;
681b07de
NTND
451 git_SHA1_Init(&c);
452 git_SHA1_Update(&c, hdr, hdrlen);
453 } else
454 sha1 = NULL;
9ec2dde9
NTND
455 if (type == OBJ_BLOB && size > big_file_threshold)
456 buf = fixed_buf;
457 else
a1e920a0 458 buf = xmallocz(size);
9cf6d335
SV
459
460 memset(&stream, 0, sizeof(stream));
7ce4721a 461 git_inflate_init(&stream);
9cf6d335 462 stream.next_out = buf;
9ec2dde9 463 stream.avail_out = buf == fixed_buf ? sizeof(fixed_buf) : size;
9cf6d335 464
7ce4721a 465 do {
681b07de 466 unsigned char *last_out = stream.next_out;
2d477051
NP
467 stream.next_in = fill(1);
468 stream.avail_in = input_len;
7ce4721a
NP
469 status = git_inflate(&stream, 0);
470 use(input_len - stream.avail_in);
681b07de
NTND
471 if (sha1)
472 git_SHA1_Update(&c, last_out, stream.next_out - last_out);
9ec2dde9
NTND
473 if (buf == fixed_buf) {
474 stream.next_out = buf;
475 stream.avail_out = sizeof(fixed_buf);
476 }
7ce4721a
NP
477 } while (status == Z_OK);
478 if (stream.total_out != size || status != Z_STREAM_END)
c2b97ecf 479 bad_object(offset, _("inflate returned %d"), status);
39c68542 480 git_inflate_end(&stream);
681b07de
NTND
481 if (sha1)
482 git_SHA1_Final(sha1, &c);
9ec2dde9 483 return buf == fixed_buf ? NULL : buf;
9cf6d335
SV
484}
485
681b07de 486static void *unpack_raw_entry(struct object_entry *obj,
c6458e60
NTND
487 off_t *ofs_offset,
488 unsigned char *ref_sha1,
681b07de 489 unsigned char *sha1)
9cf6d335 490{
48fb7deb
LT
491 unsigned char *p;
492 unsigned long size, c;
d7dd0223 493 off_t base_offset;
9cf6d335 494 unsigned shift;
ee5743ce 495 void *data;
9cf6d335 496
aa7e44bf 497 obj->idx.offset = consumed_bytes;
1e4cd68c 498 input_crc32 = crc32(0, NULL, 0);
2d477051
NP
499
500 p = fill(1);
501 c = *p;
502 use(1);
503 obj->type = (c >> 4) & 7;
9cf6d335
SV
504 size = (c & 15);
505 shift = 4;
506 while (c & 0x80) {
2d477051
NP
507 p = fill(1);
508 c = *p;
509 use(1);
48fb7deb 510 size += (c & 0x7f) << shift;
9cf6d335
SV
511 shift += 7;
512 }
2d477051 513 obj->size = size;
9cf6d335 514
2d477051 515 switch (obj->type) {
eb32d236 516 case OBJ_REF_DELTA:
c6458e60 517 hashcpy(ref_sha1, fill(20));
2d477051 518 use(20);
53dda6ff
NP
519 break;
520 case OBJ_OFS_DELTA:
2d477051
NP
521 p = fill(1);
522 c = *p;
523 use(1);
53dda6ff
NP
524 base_offset = c & 127;
525 while (c & 128) {
526 base_offset += 1;
8723f216 527 if (!base_offset || MSB(base_offset, 7))
c2b97ecf 528 bad_object(obj->idx.offset, _("offset value overflow for delta base object"));
2d477051
NP
529 p = fill(1);
530 c = *p;
531 use(1);
53dda6ff
NP
532 base_offset = (base_offset << 7) + (c & 127);
533 }
c6458e60
NTND
534 *ofs_offset = obj->idx.offset - base_offset;
535 if (*ofs_offset <= 0 || *ofs_offset >= obj->idx.offset)
c2b97ecf 536 bad_object(obj->idx.offset, _("delta base offset is out of bound"));
53dda6ff 537 break;
9cf6d335
SV
538 case OBJ_COMMIT:
539 case OBJ_TREE:
540 case OBJ_BLOB:
541 case OBJ_TAG:
9cf6d335
SV
542 break;
543 default:
c2b97ecf 544 bad_object(obj->idx.offset, _("unknown object type %d"), obj->type);
9cf6d335 545 }
aa7e44bf 546 obj->hdr_size = consumed_bytes - obj->idx.offset;
2d477051 547
681b07de 548 data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, sha1);
aa7e44bf 549 obj->idx.crc32 = input_crc32;
ee5743ce 550 return data;
2d477051
NP
551}
552
8a2e163c
NTND
553static void *unpack_data(struct object_entry *obj,
554 int (*consume)(const unsigned char *, unsigned long, void *),
555 void *cb_data)
2d477051 556{
a91ef6e7 557 off_t from = obj[0].idx.offset + obj[0].hdr_size;
7171a0b0 558 off_t len = obj[1].idx.offset - from;
776ea370 559 unsigned char *data, *inbuf;
ef49a7a0 560 git_zstream stream;
776ea370 561 int status;
9cf6d335 562
a1e920a0 563 data = xmallocz(consume ? 64*1024 : obj->size);
7171a0b0 564 inbuf = xmalloc((len < 64*1024) ? (int)len : 64*1024);
776ea370 565
2d477051 566 memset(&stream, 0, sizeof(stream));
776ea370 567 git_inflate_init(&stream);
2d477051 568 stream.next_out = data;
8a2e163c 569 stream.avail_out = consume ? 64*1024 : obj->size;
776ea370
NP
570
571 do {
7171a0b0 572 ssize_t n = (len < 64*1024) ? (ssize_t)len : 64*1024;
53f52cd9 573 n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
776ea370 574 if (n < 0)
c2b97ecf 575 die_errno(_("cannot pread pack file"));
776ea370 576 if (!n)
7171a0b0
NTND
577 die(Q_("premature end of pack file, %"PRIuMAX" byte missing",
578 "premature end of pack file, %"PRIuMAX" bytes missing",
579 (unsigned int)len),
580 (uintmax_t)len);
776ea370
NP
581 from += n;
582 len -= n;
583 stream.next_in = inbuf;
584 stream.avail_in = n;
f8b09038
JK
585 if (!consume)
586 status = git_inflate(&stream, 0);
587 else {
588 do {
589 status = git_inflate(&stream, 0);
590 if (consume(data, stream.next_out - data, cb_data)) {
591 free(inbuf);
592 free(data);
593 return NULL;
594 }
595 stream.next_out = data;
596 stream.avail_out = 64*1024;
597 } while (status == Z_OK && stream.avail_in);
8a2e163c 598 }
776ea370
NP
599 } while (len && status == Z_OK && !stream.avail_in);
600
601 /* This has been inflated OK when first encountered, so... */
602 if (status != Z_STREAM_END || stream.total_out != obj->size)
c2b97ecf 603 die(_("serious inflate inconsistency"));
776ea370
NP
604
605 git_inflate_end(&stream);
606 free(inbuf);
8a2e163c
NTND
607 if (consume) {
608 free(data);
609 data = NULL;
610 }
9cf6d335
SV
611 return data;
612}
613
8a2e163c
NTND
614static void *get_data_from_pack(struct object_entry *obj)
615{
616 return unpack_data(obj, NULL, NULL);
617}
618
c6458e60
NTND
619static int compare_ofs_delta_bases(off_t offset1, off_t offset2,
620 enum object_type type1,
621 enum object_type type2)
7218a215
JH
622{
623 int cmp = type1 - type2;
624 if (cmp)
625 return cmp;
f0e7f11d
JK
626 return offset1 < offset2 ? -1 :
627 offset1 > offset2 ? 1 :
628 0;
7218a215
JH
629}
630
c6458e60 631static int find_ofs_delta(const off_t offset, enum object_type type)
9cf6d335 632{
c6458e60
NTND
633 int first = 0, last = nr_ofs_deltas;
634
635 while (first < last) {
636 int next = (first + last) / 2;
637 struct ofs_delta_entry *delta = &ofs_deltas[next];
638 int cmp;
639
640 cmp = compare_ofs_delta_bases(offset, delta->offset,
641 type, objects[delta->obj_no].type);
642 if (!cmp)
643 return next;
644 if (cmp < 0) {
645 last = next;
646 continue;
647 }
648 first = next+1;
649 }
650 return -first-1;
9cf6d335
SV
651}
652
c6458e60
NTND
653static void find_ofs_delta_children(off_t offset,
654 int *first_index, int *last_index,
655 enum object_type type)
9cf6d335 656{
c6458e60 657 int first = find_ofs_delta(offset, type);
9cf6d335 658 int last = first;
c6458e60 659 int end = nr_ofs_deltas - 1;
9cf6d335 660
6a87ed97
NP
661 if (first < 0) {
662 *first_index = 0;
663 *last_index = -1;
664 return;
665 }
c6458e60 666 while (first > 0 && ofs_deltas[first - 1].offset == offset)
9cf6d335 667 --first;
c6458e60
NTND
668 while (last < end && ofs_deltas[last + 1].offset == offset)
669 ++last;
670 *first_index = first;
671 *last_index = last;
672}
673
674static int compare_ref_delta_bases(const unsigned char *sha1,
675 const unsigned char *sha2,
676 enum object_type type1,
677 enum object_type type2)
678{
679 int cmp = type1 - type2;
680 if (cmp)
681 return cmp;
682 return hashcmp(sha1, sha2);
683}
684
685static int find_ref_delta(const unsigned char *sha1, enum object_type type)
686{
687 int first = 0, last = nr_ref_deltas;
688
689 while (first < last) {
690 int next = (first + last) / 2;
691 struct ref_delta_entry *delta = &ref_deltas[next];
692 int cmp;
693
694 cmp = compare_ref_delta_bases(sha1, delta->sha1,
695 type, objects[delta->obj_no].type);
696 if (!cmp)
697 return next;
698 if (cmp < 0) {
699 last = next;
700 continue;
701 }
702 first = next+1;
703 }
704 return -first-1;
705}
706
707static void find_ref_delta_children(const unsigned char *sha1,
708 int *first_index, int *last_index,
709 enum object_type type)
710{
711 int first = find_ref_delta(sha1, type);
712 int last = first;
713 int end = nr_ref_deltas - 1;
714
715 if (first < 0) {
716 *first_index = 0;
717 *last_index = -1;
718 return;
719 }
720 while (first > 0 && !hashcmp(ref_deltas[first - 1].sha1, sha1))
721 --first;
722 while (last < end && !hashcmp(ref_deltas[last + 1].sha1, sha1))
9cf6d335
SV
723 ++last;
724 *first_index = first;
725 *last_index = last;
9cf6d335
SV
726}
727
4614043c
NTND
728struct compare_data {
729 struct object_entry *entry;
730 struct git_istream *st;
731 unsigned char *buf;
732 unsigned long buf_size;
733};
734
735static int compare_objects(const unsigned char *buf, unsigned long size,
736 void *cb_data)
737{
738 struct compare_data *data = cb_data;
739
740 if (data->buf_size < size) {
741 free(data->buf);
742 data->buf = xmalloc(size);
743 data->buf_size = size;
744 }
745
746 while (size) {
747 ssize_t len = read_istream(data->st, data->buf, size);
748 if (len == 0)
749 die(_("SHA1 COLLISION FOUND WITH %s !"),
e6a492b7 750 oid_to_hex(&data->entry->idx.oid));
4614043c
NTND
751 if (len < 0)
752 die(_("unable to read %s"),
e6a492b7 753 oid_to_hex(&data->entry->idx.oid));
4614043c
NTND
754 if (memcmp(buf, data->buf, len))
755 die(_("SHA1 COLLISION FOUND WITH %s !"),
e6a492b7 756 oid_to_hex(&data->entry->idx.oid));
4614043c
NTND
757 size -= len;
758 buf += len;
759 }
760 return 0;
761}
762
763static int check_collison(struct object_entry *entry)
764{
765 struct compare_data data;
766 enum object_type type;
767 unsigned long size;
768
769 if (entry->size <= big_file_threshold || entry->type != OBJ_BLOB)
770 return -1;
771
772 memset(&data, 0, sizeof(data));
773 data.entry = entry;
e6a492b7 774 data.st = open_istream(entry->idx.oid.hash, &type, &size, NULL);
4614043c
NTND
775 if (!data.st)
776 return -1;
777 if (size != entry->size || type != entry->type)
778 die(_("SHA1 COLLISION FOUND WITH %s !"),
e6a492b7 779 oid_to_hex(&entry->idx.oid));
4614043c
NTND
780 unpack_data(entry, compare_objects, &data);
781 close_istream(data.st);
782 free(data.buf);
783 return 0;
784}
785
9ec2dde9
NTND
786static void sha1_object(const void *data, struct object_entry *obj_entry,
787 unsigned long size, enum object_type type,
788 const unsigned char *sha1)
9cf6d335 789{
9ec2dde9 790 void *new_data = NULL;
29401e15 791 int collision_test_needed = 0;
9ec2dde9
NTND
792
793 assert(data || obj_entry);
794
29401e15
JK
795 if (startup_info->have_repository) {
796 read_lock();
797 collision_test_needed = has_sha1_file_with_flags(sha1, HAS_SHA1_QUICK);
798 read_unlock();
799 }
4614043c
NTND
800
801 if (collision_test_needed && !data) {
802 read_lock();
803 if (!check_collison(obj_entry))
804 collision_test_needed = 0;
805 read_unlock();
806 }
807 if (collision_test_needed) {
8685da42
NP
808 void *has_data;
809 enum object_type has_type;
810 unsigned long has_size;
4614043c
NTND
811 read_lock();
812 has_type = sha1_object_info(sha1, &has_size);
51054177
JK
813 if (has_type < 0)
814 die(_("cannot read existing object info %s"), sha1_to_hex(sha1));
4614043c
NTND
815 if (has_type != type || has_size != size)
816 die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1));
8685da42 817 has_data = read_sha1_file(sha1, &has_type, &has_size);
b8a2486f 818 read_unlock();
4614043c
NTND
819 if (!data)
820 data = new_data = get_data_from_pack(obj_entry);
8685da42 821 if (!has_data)
c2b97ecf 822 die(_("cannot read existing object %s"), sha1_to_hex(sha1));
8685da42
NP
823 if (size != has_size || type != has_type ||
824 memcmp(data, has_data, size) != 0)
c2b97ecf 825 die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1));
bbf4b41b 826 free(has_data);
4614043c 827 }
b8a2486f 828
0153be05 829 if (strict) {
b8a2486f 830 read_lock();
0153be05
MK
831 if (type == OBJ_BLOB) {
832 struct blob *blob = lookup_blob(sha1);
833 if (blob)
834 blob->object.flags |= FLAG_CHECKED;
835 else
c2b97ecf 836 die(_("invalid blob object %s"), sha1_to_hex(sha1));
0153be05
MK
837 } else {
838 struct object *obj;
839 int eaten;
840 void *buf = (void *) data;
841
920734b0 842 assert(data && "data can only be NULL for large _blobs_");
9ec2dde9 843
0153be05
MK
844 /*
845 * we do not need to free the memory here, as the
846 * buf is deleted by the caller.
847 */
848 obj = parse_object_buffer(sha1, type, size, buf, &eaten);
849 if (!obj)
c2b97ecf 850 die(_("invalid %s"), typename(type));
c6807a40 851 if (do_fsck_object &&
22410549 852 fsck_object(obj, buf, size, &fsck_options))
c2b97ecf 853 die(_("Error in object"));
22410549 854 if (fsck_walk(obj, NULL, &fsck_options))
f2fd0760 855 die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj->oid));
0153be05
MK
856
857 if (obj->type == OBJ_TREE) {
858 struct tree *item = (struct tree *) obj;
859 item->buffer = NULL;
6e454b9a 860 obj->parsed = 0;
0153be05
MK
861 }
862 if (obj->type == OBJ_COMMIT) {
863 struct commit *commit = (struct commit *) obj;
8597ea3a 864 if (detach_commit_buffer(commit, NULL) != data)
0fb370da 865 die("BUG: parse_object_buffer transmogrified our buffer");
0153be05
MK
866 }
867 obj->flags |= FLAG_CHECKED;
868 }
b8a2486f 869 read_unlock();
0153be05 870 }
9ec2dde9
NTND
871
872 free(new_data);
9cf6d335
SV
873}
874
20e95d0a
NTND
875/*
876 * This function is part of find_unresolved_deltas(). There are two
877 * walkers going in the opposite ways.
878 *
879 * The first one in find_unresolved_deltas() traverses down from
880 * parent node to children, deflating nodes along the way. However,
881 * memory for deflated nodes is limited by delta_base_cache_limit, so
882 * at some point parent node's deflated content may be freed.
883 *
884 * The second walker is this function, which goes from current node up
885 * to top parent if necessary to deflate the node. In normal
886 * situation, its parent node would be already deflated, so it just
887 * needs to apply delta.
888 *
889 * In the worst case scenario, parent node is no longer deflated because
890 * we're running out of delta_base_cache_limit; we need to re-deflate
891 * parents, possibly up to the top base.
892 *
893 * All deflated objects here are subject to be freed if we exceed
894 * delta_base_cache_limit, just like in find_unresolved_deltas(), we
895 * just need to make sure the last node is not freed.
896 */
92392b4a
SP
897static void *get_base_data(struct base_data *c)
898{
899 if (!c->data) {
900 struct object_entry *obj = c->obj;
20e95d0a
NTND
901 struct base_data **delta = NULL;
902 int delta_nr = 0, delta_alloc = 0;
92392b4a 903
20e95d0a
NTND
904 while (is_delta_type(c->obj->type) && !c->data) {
905 ALLOC_GROW(delta, delta_nr + 1, delta_alloc);
906 delta[delta_nr++] = c;
907 c = c->base;
908 }
909 if (!delta_nr) {
910 c->data = get_data_from_pack(obj);
911 c->size = obj->size;
b8a2486f 912 get_thread_data()->base_cache_used += c->size;
20e95d0a
NTND
913 prune_base_data(c);
914 }
915 for (; delta_nr > 0; delta_nr--) {
916 void *base, *raw;
917 c = delta[delta_nr - 1];
918 obj = c->obj;
919 base = get_base_data(c->base);
920 raw = get_data_from_pack(obj);
92392b4a
SP
921 c->data = patch_delta(
922 base, c->base->size,
923 raw, obj->size,
924 &c->size);
925 free(raw);
926 if (!c->data)
c2b97ecf 927 bad_object(obj->idx.offset, _("failed to apply delta"));
b8a2486f 928 get_thread_data()->base_cache_used += c->size;
20e95d0a 929 prune_base_data(c);
9441b61d 930 }
20e95d0a 931 free(delta);
92392b4a
SP
932 }
933 return c->data;
934}
935
f41aebd4 936static void resolve_delta(struct object_entry *delta_obj,
9441b61d 937 struct base_data *base, struct base_data *result)
9cf6d335 938{
ce3f6dc6 939 void *base_data, *delta_data;
9cf6d335 940
3aba2fdd 941 if (show_stat) {
41730576
NTND
942 int i = delta_obj - objects;
943 int j = base->obj - objects;
944 obj_stat[i].delta_depth = obj_stat[j].delta_depth + 1;
3aba2fdd 945 deepest_delta_lock();
41730576
NTND
946 if (deepest_delta < obj_stat[i].delta_depth)
947 deepest_delta = obj_stat[i].delta_depth;
3aba2fdd 948 deepest_delta_unlock();
41730576 949 obj_stat[i].base_object_no = j;
3aba2fdd 950 }
636171cb 951 delta_data = get_data_from_pack(delta_obj);
ce3f6dc6 952 base_data = get_base_data(base);
9441b61d 953 result->obj = delta_obj;
ce3f6dc6
NP
954 result->data = patch_delta(base_data, base->size,
955 delta_data, delta_obj->size, &result->size);
9cf6d335 956 free(delta_data);
9441b61d 957 if (!result->data)
c2b97ecf 958 bad_object(delta_obj->idx.offset, _("failed to apply delta"));
681b07de 959 hash_sha1_file(result->data, result->size,
e6a492b7 960 typename(delta_obj->real_type),
961 delta_obj->idx.oid.hash);
9ec2dde9 962 sha1_object(result->data, NULL, result->size, delta_obj->real_type,
e6a492b7 963 delta_obj->idx.oid.hash);
b8a2486f 964 counter_lock();
636171cb 965 nr_resolved_deltas++;
b8a2486f 966 counter_unlock();
9441b61d
NP
967}
968
ab791dd1
JK
969/*
970 * Standard boolean compare-and-swap: atomically check whether "*type" is
971 * "want"; if so, swap in "set" and return true. Otherwise, leave it untouched
972 * and return false.
973 */
41730576 974static int compare_and_swap_type(signed char *type,
ab791dd1
JK
975 enum object_type want,
976 enum object_type set)
977{
978 enum object_type old;
979
980 type_cas_lock();
981 old = *type;
982 if (old == want)
983 *type = set;
984 type_cas_unlock();
985
986 return old == want;
987}
988
2baad220
NTND
989static struct base_data *find_unresolved_deltas_1(struct base_data *base,
990 struct base_data *prev_base)
9441b61d 991{
2baad220 992 if (base->ref_last == -1 && base->ofs_last == -1) {
e6a492b7 993 find_ref_delta_children(base->obj->idx.oid.hash,
c6458e60
NTND
994 &base->ref_first, &base->ref_last,
995 OBJ_REF_DELTA);
9441b61d 996
c6458e60
NTND
997 find_ofs_delta_children(base->obj->idx.offset,
998 &base->ofs_first, &base->ofs_last,
999 OBJ_OFS_DELTA);
4a438cab 1000
2baad220
NTND
1001 if (base->ref_last == -1 && base->ofs_last == -1) {
1002 free(base->data);
1003 return NULL;
1004 }
53dda6ff 1005
2baad220
NTND
1006 link_base_data(prev_base, base);
1007 }
4a438cab 1008
2baad220 1009 if (base->ref_first <= base->ref_last) {
c6458e60 1010 struct object_entry *child = objects + ref_deltas[base->ref_first].obj_no;
2baad220 1011 struct base_data *result = alloc_base_data();
7218a215 1012
ab791dd1
JK
1013 if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA,
1014 base->obj->real_type))
1015 die("BUG: child->real_type != OBJ_REF_DELTA");
1016
2baad220
NTND
1017 resolve_delta(child, base, result);
1018 if (base->ref_first == base->ref_last && base->ofs_last == -1)
7218a215 1019 free_base_data(base);
2baad220
NTND
1020
1021 base->ref_first++;
1022 return result;
53dda6ff
NP
1023 }
1024
2baad220 1025 if (base->ofs_first <= base->ofs_last) {
c6458e60 1026 struct object_entry *child = objects + ofs_deltas[base->ofs_first].obj_no;
2baad220 1027 struct base_data *result = alloc_base_data();
7218a215
JH
1028
1029 assert(child->real_type == OBJ_OFS_DELTA);
ab791dd1 1030 child->real_type = base->obj->real_type;
2baad220
NTND
1031 resolve_delta(child, base, result);
1032 if (base->ofs_first == base->ofs_last)
7218a215 1033 free_base_data(base);
2baad220
NTND
1034
1035 base->ofs_first++;
1036 return result;
9cf6d335 1037 }
53dda6ff 1038
9441b61d 1039 unlink_base_data(base);
2baad220
NTND
1040 return NULL;
1041}
1042
1043static void find_unresolved_deltas(struct base_data *base)
1044{
1045 struct base_data *new_base, *prev_base = NULL;
1046 for (;;) {
1047 new_base = find_unresolved_deltas_1(base, prev_base);
1048
1049 if (new_base) {
1050 prev_base = base;
1051 base = new_base;
1052 } else {
1053 free(base);
1054 base = prev_base;
1055 if (!base)
1056 return;
1057 prev_base = base->base;
1058 }
1059 }
9cf6d335
SV
1060}
1061
c6458e60 1062static int compare_ofs_delta_entry(const void *a, const void *b)
9cf6d335 1063{
c6458e60
NTND
1064 const struct ofs_delta_entry *delta_a = a;
1065 const struct ofs_delta_entry *delta_b = b;
7218a215 1066
f0e7f11d
JK
1067 return delta_a->offset < delta_b->offset ? -1 :
1068 delta_a->offset > delta_b->offset ? 1 :
1069 0;
c6458e60
NTND
1070}
1071
1072static int compare_ref_delta_entry(const void *a, const void *b)
9cf6d335 1073{
c6458e60
NTND
1074 const struct ref_delta_entry *delta_a = a;
1075 const struct ref_delta_entry *delta_b = b;
7218a215 1076
c6458e60 1077 return hashcmp(delta_a->sha1, delta_b->sha1);
9cf6d335
SV
1078}
1079
5272f755
NTND
1080static void resolve_base(struct object_entry *obj)
1081{
1082 struct base_data *base_obj = alloc_base_data();
1083 base_obj->obj = obj;
1084 base_obj->data = NULL;
1085 find_unresolved_deltas(base_obj);
1086}
1087
b8a2486f
NTND
1088#ifndef NO_PTHREADS
1089static void *threaded_second_pass(void *data)
1090{
1091 set_thread_data(data);
1092 for (;;) {
1093 int i;
8f82aad4 1094 counter_lock();
b8a2486f 1095 display_progress(progress, nr_resolved_deltas);
8f82aad4
TR
1096 counter_unlock();
1097 work_lock();
b8a2486f
NTND
1098 while (nr_dispatched < nr_objects &&
1099 is_delta_type(objects[nr_dispatched].type))
1100 nr_dispatched++;
1101 if (nr_dispatched >= nr_objects) {
1102 work_unlock();
1103 break;
1104 }
1105 i = nr_dispatched++;
1106 work_unlock();
1107
1108 resolve_base(&objects[i]);
1109 }
1110 return NULL;
1111}
1112#endif
1113
5272f755
NTND
1114/*
1115 * First pass:
1116 * - find locations of all objects;
1117 * - calculate SHA1 of all non-delta objects;
1118 * - remember base (SHA1 or offset) for all deltas.
1119 */
2d477051 1120static void parse_pack_objects(unsigned char *sha1)
9cf6d335 1121{
9ec2dde9 1122 int i, nr_delays = 0;
c6458e60
NTND
1123 struct ofs_delta_entry *ofs_delta = ofs_deltas;
1124 unsigned char ref_delta_sha1[20];
2d477051 1125 struct stat st;
9cf6d335 1126
13aaf148 1127 if (verbose)
29e63ed3 1128 progress = start_progress(
c2b97ecf 1129 from_stdin ? _("Receiving objects") : _("Indexing objects"),
29e63ed3 1130 nr_objects);
9cf6d335
SV
1131 for (i = 0; i < nr_objects; i++) {
1132 struct object_entry *obj = &objects[i];
c6458e60 1133 void *data = unpack_raw_entry(obj, &ofs_delta->offset,
e6a492b7 1134 ref_delta_sha1,
1135 obj->idx.oid.hash);
9cf6d335 1136 obj->real_type = obj->type;
c6458e60
NTND
1137 if (obj->type == OBJ_OFS_DELTA) {
1138 nr_ofs_deltas++;
1139 ofs_delta->obj_no = i;
1140 ofs_delta++;
1141 } else if (obj->type == OBJ_REF_DELTA) {
1142 ALLOC_GROW(ref_deltas, nr_ref_deltas + 1, ref_deltas_alloc);
1143 hashcpy(ref_deltas[nr_ref_deltas].sha1, ref_delta_sha1);
1144 ref_deltas[nr_ref_deltas].obj_no = i;
1145 nr_ref_deltas++;
9ec2dde9
NTND
1146 } else if (!data) {
1147 /* large blobs, check later */
1148 obj->real_type = OBJ_BAD;
1149 nr_delays++;
9cf6d335 1150 } else
e6a492b7 1151 sha1_object(data, NULL, obj->size, obj->type,
1152 obj->idx.oid.hash);
9cf6d335 1153 free(data);
4d4fcc54 1154 display_progress(progress, i+1);
9cf6d335 1155 }
aa7e44bf 1156 objects[i].idx.offset = consumed_bytes;
4d4fcc54 1157 stop_progress(&progress);
2d477051
NP
1158
1159 /* Check pack integrity */
636171cb 1160 flush();
9126f009 1161 git_SHA1_Final(sha1, &input_ctx);
2d477051 1162 if (hashcmp(fill(20), sha1))
c2b97ecf 1163 die(_("pack is corrupted (SHA1 mismatch)"));
9bee2478 1164 use(20);
2d477051
NP
1165
1166 /* If input_fd is a file, we should have reached its end now. */
1167 if (fstat(input_fd, &st))
c2b97ecf 1168 die_errno(_("cannot fstat packfile"));
fa257b05
JS
1169 if (S_ISREG(st.st_mode) &&
1170 lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size)
c2b97ecf 1171 die(_("pack has junk at the end"));
9ec2dde9
NTND
1172
1173 for (i = 0; i < nr_objects; i++) {
1174 struct object_entry *obj = &objects[i];
1175 if (obj->real_type != OBJ_BAD)
1176 continue;
1177 obj->real_type = obj->type;
e6a492b7 1178 sha1_object(NULL, obj, obj->size, obj->type,
1179 obj->idx.oid.hash);
9ec2dde9
NTND
1180 nr_delays--;
1181 }
1182 if (nr_delays)
1183 die(_("confusion beyond insanity in parse_pack_objects()"));
5272f755
NTND
1184}
1185
1186/*
1187 * Second pass:
1188 * - for all non-delta objects, look if it is used as a base for
1189 * deltas;
1190 * - if used as a base, uncompress the object and apply all deltas,
1191 * recursively checking if the resulting object is used as a base
1192 * for some more deltas.
1193 */
1194static void resolve_deltas(void)
1195{
1196 int i;
9cf6d335 1197
c6458e60 1198 if (!nr_ofs_deltas && !nr_ref_deltas)
3c9af366
NP
1199 return;
1200
53dda6ff 1201 /* Sort deltas by base SHA1/offset for fast searching */
9ed0d8d6
RS
1202 QSORT(ofs_deltas, nr_ofs_deltas, compare_ofs_delta_entry);
1203 QSORT(ref_deltas, nr_ref_deltas, compare_ref_delta_entry);
9cf6d335 1204
e376f17f 1205 if (verbose || show_resolving_progress)
c6458e60
NTND
1206 progress = start_progress(_("Resolving deltas"),
1207 nr_ref_deltas + nr_ofs_deltas);
b8a2486f
NTND
1208
1209#ifndef NO_PTHREADS
1210 nr_dispatched = 0;
1211 if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) {
1212 init_thread();
1213 for (i = 0; i < nr_threads; i++) {
1214 int ret = pthread_create(&thread_data[i].thread, NULL,
1215 threaded_second_pass, thread_data + i);
1216 if (ret)
f350df42
NTND
1217 die(_("unable to create thread: %s"),
1218 strerror(ret));
b8a2486f
NTND
1219 }
1220 for (i = 0; i < nr_threads; i++)
1221 pthread_join(thread_data[i].thread, NULL);
1222 cleanup_thread();
1223 return;
1224 }
1225#endif
1226
9cf6d335
SV
1227 for (i = 0; i < nr_objects; i++) {
1228 struct object_entry *obj = &objects[i];
9cf6d335 1229
4f8ec74e 1230 if (is_delta_type(obj->type))
9cf6d335 1231 continue;
5272f755 1232 resolve_base(obj);
4d4fcc54 1233 display_progress(progress, nr_resolved_deltas);
9cf6d335 1234 }
636171cb
NP
1235}
1236
5272f755
NTND
1237/*
1238 * Third pass:
1239 * - append objects to convert thin pack to full pack if required
1240 * - write the final 20-byte SHA-1
1241 */
781d9306 1242static void fix_unresolved_deltas(struct sha1file *f);
5272f755
NTND
1243static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_sha1)
1244{
c6458e60 1245 if (nr_ref_deltas + nr_ofs_deltas == nr_resolved_deltas) {
5272f755
NTND
1246 stop_progress(&progress);
1247 /* Flush remaining pack final 20-byte SHA1. */
1248 flush();
1249 return;
1250 }
1251
1252 if (fix_thin_pack) {
1253 struct sha1file *f;
1254 unsigned char read_sha1[20], tail_sha1[20];
5c3459fc 1255 struct strbuf msg = STRBUF_INIT;
c6458e60 1256 int nr_unresolved = nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas;
5272f755
NTND
1257 int nr_objects_initial = nr_objects;
1258 if (nr_unresolved <= 0)
cc13431a 1259 die(_("confusion beyond insanity"));
2756ca43 1260 REALLOC_ARRAY(objects, nr_objects + nr_unresolved + 1);
57165db0
JK
1261 memset(objects + nr_objects + 1, 0,
1262 nr_unresolved * sizeof(*objects));
5272f755 1263 f = sha1fd(output_fd, curr_pack);
781d9306 1264 fix_unresolved_deltas(f);
71d99b81
VA
1265 strbuf_addf(&msg, Q_("completed with %d local object",
1266 "completed with %d local objects",
1267 nr_objects - nr_objects_initial),
5c3459fc
NTND
1268 nr_objects - nr_objects_initial);
1269 stop_progress_msg(&progress, msg.buf);
1270 strbuf_release(&msg);
5272f755
NTND
1271 sha1close(f, tail_sha1, 0);
1272 hashcpy(read_sha1, pack_sha1);
1273 fixup_pack_header_footer(output_fd, pack_sha1,
1274 curr_pack, nr_objects,
1275 read_sha1, consumed_bytes-20);
1276 if (hashcmp(read_sha1, tail_sha1) != 0)
f350df42
NTND
1277 die(_("Unexpected tail checksum for %s "
1278 "(disk corruption?)"), curr_pack);
5272f755 1279 }
c6458e60 1280 if (nr_ofs_deltas + nr_ref_deltas != nr_resolved_deltas)
cc13431a
JH
1281 die(Q_("pack has %d unresolved delta",
1282 "pack has %d unresolved deltas",
c6458e60
NTND
1283 nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas),
1284 nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas);
5272f755
NTND
1285}
1286
8522148f 1287static int write_compressed(struct sha1file *f, void *in, unsigned int size)
636171cb 1288{
ef49a7a0 1289 git_zstream stream;
7734d7f2
NP
1290 int status;
1291 unsigned char outbuf[4096];
636171cb 1292
55bb5c91 1293 git_deflate_init(&stream, zlib_compression_level);
636171cb
NP
1294 stream.next_in = in;
1295 stream.avail_in = size;
636171cb 1296
7734d7f2
NP
1297 do {
1298 stream.next_out = outbuf;
1299 stream.avail_out = sizeof(outbuf);
55bb5c91 1300 status = git_deflate(&stream, Z_FINISH);
7734d7f2
NP
1301 sha1write(f, outbuf, sizeof(outbuf) - stream.avail_out);
1302 } while (status == Z_OK);
1303
1304 if (status != Z_STREAM_END)
c2b97ecf 1305 die(_("unable to deflate appended object (%d)"), status);
636171cb 1306 size = stream.total_out;
55bb5c91 1307 git_deflate_end(&stream);
636171cb
NP
1308 return size;
1309}
1310
8522148f 1311static struct object_entry *append_obj_to_pack(struct sha1file *f,
03993e13 1312 const unsigned char *sha1, void *buf,
636171cb
NP
1313 unsigned long size, enum object_type type)
1314{
1315 struct object_entry *obj = &objects[nr_objects++];
1316 unsigned char header[10];
1317 unsigned long s = size;
1318 int n = 0;
1319 unsigned char c = (type << 4) | (s & 15);
1320 s >>= 4;
1321 while (s) {
1322 header[n++] = c | 0x80;
1323 c = s & 0x7f;
1324 s >>= 7;
1325 }
1326 header[n++] = c;
8522148f
NP
1327 crc32_begin(f);
1328 sha1write(f, header, n);
72de2883
BS
1329 obj[0].size = size;
1330 obj[0].hdr_size = n;
1331 obj[0].type = type;
1332 obj[0].real_type = type;
aa7e44bf 1333 obj[1].idx.offset = obj[0].idx.offset + n;
8522148f
NP
1334 obj[1].idx.offset += write_compressed(f, buf, size);
1335 obj[0].idx.crc32 = crc32_end(f);
838cd346 1336 sha1flush(f);
e6a492b7 1337 hashcpy(obj->idx.oid.hash, sha1);
03993e13 1338 return obj;
636171cb
NP
1339}
1340
1341static int delta_pos_compare(const void *_a, const void *_b)
1342{
c6458e60
NTND
1343 struct ref_delta_entry *a = *(struct ref_delta_entry **)_a;
1344 struct ref_delta_entry *b = *(struct ref_delta_entry **)_b;
636171cb
NP
1345 return a->obj_no - b->obj_no;
1346}
9cf6d335 1347
781d9306 1348static void fix_unresolved_deltas(struct sha1file *f)
636171cb 1349{
c6458e60 1350 struct ref_delta_entry **sorted_by_pos;
781d9306 1351 int i;
636171cb
NP
1352
1353 /*
1354 * Since many unresolved deltas may well be themselves base objects
1355 * for more unresolved deltas, we really want to include the
1356 * smallest number of base objects that would cover as much delta
1357 * as possible by picking the
1358 * trunc deltas first, allowing for other deltas to resolve without
1359 * additional base objects. Since most base objects are to be found
1360 * before deltas depending on them, a good heuristic is to start
1361 * resolving deltas in the same order as their position in the pack.
1362 */
b32fa95f 1363 ALLOC_ARRAY(sorted_by_pos, nr_ref_deltas);
c6458e60 1364 for (i = 0; i < nr_ref_deltas; i++)
781d9306 1365 sorted_by_pos[i] = &ref_deltas[i];
9ed0d8d6 1366 QSORT(sorted_by_pos, nr_ref_deltas, delta_pos_compare);
636171cb 1367
781d9306 1368 for (i = 0; i < nr_ref_deltas; i++) {
c6458e60 1369 struct ref_delta_entry *d = sorted_by_pos[i];
21666f1a 1370 enum object_type type;
2baad220 1371 struct base_data *base_obj = alloc_base_data();
636171cb
NP
1372
1373 if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
1374 continue;
c6458e60 1375 base_obj->data = read_sha1_file(d->sha1, &type, &base_obj->size);
2baad220 1376 if (!base_obj->data)
636171cb 1377 continue;
636171cb 1378
c6458e60 1379 if (check_sha1_signature(d->sha1, base_obj->data,
2baad220 1380 base_obj->size, typename(type)))
c6458e60
NTND
1381 die(_("local object %s is corrupt"), sha1_to_hex(d->sha1));
1382 base_obj->obj = append_obj_to_pack(f, d->sha1,
2baad220
NTND
1383 base_obj->data, base_obj->size, type);
1384 find_unresolved_deltas(base_obj);
4d4fcc54 1385 display_progress(progress, nr_resolved_deltas);
636171cb
NP
1386 }
1387 free(sorted_by_pos);
1388}
1389
e42797f5
NP
1390static void final(const char *final_pack_name, const char *curr_pack_name,
1391 const char *final_index_name, const char *curr_index_name,
b8077709 1392 const char *keep_name, const char *keep_msg,
e42797f5
NP
1393 unsigned char *sha1)
1394{
3a55602e 1395 const char *report = "pack";
f2075480
JK
1396 struct strbuf pack_name = STRBUF_INIT;
1397 struct strbuf index_name = STRBUF_INIT;
1398 struct strbuf keep_name_buf = STRBUF_INIT;
e42797f5
NP
1399 int err;
1400
1401 if (!from_stdin) {
1402 close(input_fd);
1403 } else {
4c81b03e 1404 fsync_or_die(output_fd, curr_pack_name);
e42797f5
NP
1405 err = close(output_fd);
1406 if (err)
c2b97ecf 1407 die_errno(_("error while closing pack file"));
e42797f5
NP
1408 }
1409
b8077709
SP
1410 if (keep_msg) {
1411 int keep_fd, keep_msg_len = strlen(keep_msg);
6e180cdc
JH
1412
1413 if (!keep_name)
f2075480 1414 keep_name = odb_pack_name(&keep_name_buf, sha1, "keep");
6e180cdc 1415
f2075480 1416 keep_fd = odb_pack_keep(keep_name);
9ca4a201
NP
1417 if (keep_fd < 0) {
1418 if (errno != EEXIST)
c2b97ecf 1419 die_errno(_("cannot write keep file '%s'"),
f2075480 1420 keep_name);
9ca4a201
NP
1421 } else {
1422 if (keep_msg_len > 0) {
1423 write_or_die(keep_fd, keep_msg, keep_msg_len);
1424 write_or_die(keep_fd, "\n", 1);
1425 }
91c8d590 1426 if (close(keep_fd) != 0)
c2b97ecf 1427 die_errno(_("cannot close written keep file '%s'"),
f2075480 1428 keep_name);
576162a4 1429 report = "keep";
b8077709 1430 }
b8077709
SP
1431 }
1432
e42797f5 1433 if (final_pack_name != curr_pack_name) {
ba47a308 1434 if (!final_pack_name)
f2075480 1435 final_pack_name = odb_pack_name(&pack_name, sha1, "pack");
cb5add58 1436 if (finalize_object_file(curr_pack_name, final_pack_name))
c2b97ecf 1437 die(_("cannot store pack file"));
fb8b1936 1438 } else if (from_stdin)
33b65030 1439 chmod(final_pack_name, 0444);
e42797f5 1440
e42797f5 1441 if (final_index_name != curr_index_name) {
ba47a308 1442 if (!final_index_name)
f2075480 1443 final_index_name = odb_pack_name(&index_name, sha1, "idx");
cb5add58 1444 if (finalize_object_file(curr_index_name, final_index_name))
c2b97ecf 1445 die(_("cannot store index file"));
fb8b1936
JH
1446 } else
1447 chmod(final_index_name, 0444);
576162a4
NP
1448
1449 if (!from_stdin) {
1450 printf("%s\n", sha1_to_hex(sha1));
1451 } else {
5b1ef2ce
JK
1452 struct strbuf buf = STRBUF_INIT;
1453
1454 strbuf_addf(&buf, "%s\t%s\n", report, sha1_to_hex(sha1));
1455 write_or_die(1, buf.buf, buf.len);
1456 strbuf_release(&buf);
576162a4
NP
1457
1458 /*
1459 * Let's just mimic git-unpack-objects here and write
1460 * the last part of the input buffer to stdout.
1461 */
1462 while (input_len) {
1463 err = xwrite(1, input_buffer + input_offset, input_len);
1464 if (err <= 0)
1465 break;
1466 input_len -= err;
1467 input_offset += err;
1468 }
1469 }
ba47a308 1470
f2075480
JK
1471 strbuf_release(&index_name);
1472 strbuf_release(&pack_name);
1473 strbuf_release(&keep_name_buf);
9cf6d335
SV
1474}
1475
ef90d6d4 1476static int git_index_pack_config(const char *k, const char *v, void *cb)
4d00bda2 1477{
ebcfb379
JH
1478 struct pack_idx_option *opts = cb;
1479
4d00bda2 1480 if (!strcmp(k, "pack.indexversion")) {
ebcfb379
JH
1481 opts->version = git_config_int(k, v);
1482 if (opts->version > 2)
f350df42 1483 die(_("bad pack.indexversion=%"PRIu32), opts->version);
4d00bda2
NP
1484 return 0;
1485 }
b8a2486f
NTND
1486 if (!strcmp(k, "pack.threads")) {
1487 nr_threads = git_config_int(k, v);
1488 if (nr_threads < 0)
f350df42 1489 die(_("invalid number of threads specified (%d)"),
b8a2486f
NTND
1490 nr_threads);
1491#ifdef NO_PTHREADS
1492 if (nr_threads != 1)
f350df42 1493 warning(_("no threads support, ignoring %s"), k);
b8a2486f
NTND
1494 nr_threads = 1;
1495#endif
1496 return 0;
1497 }
ef90d6d4 1498 return git_default_config(k, v, cb);
4d00bda2
NP
1499}
1500
3c9fc074
JH
1501static int cmp_uint32(const void *a_, const void *b_)
1502{
1503 uint32_t a = *((uint32_t *)a_);
1504 uint32_t b = *((uint32_t *)b_);
1505
1506 return (a < b) ? -1 : (a != b);
1507}
1508
1509static void read_v2_anomalous_offsets(struct packed_git *p,
1510 struct pack_idx_option *opts)
1511{
1512 const uint32_t *idx1, *idx2;
1513 uint32_t i;
1514
1515 /* The address of the 4-byte offset table */
1516 idx1 = (((const uint32_t *)p->index_data)
1517 + 2 /* 8-byte header */
1518 + 256 /* fan out */
1519 + 5 * p->num_objects /* 20-byte SHA-1 table */
1520 + p->num_objects /* CRC32 table */
1521 );
1522
1523 /* The address of the 8-byte offset table */
1524 idx2 = idx1 + p->num_objects;
1525
1526 for (i = 0; i < p->num_objects; i++) {
1527 uint32_t off = ntohl(idx1[i]);
1528 if (!(off & 0x80000000))
1529 continue;
1530 off = off & 0x7fffffff;
47fe3f6e 1531 check_pack_index_ptr(p, &idx2[off * 2]);
3c9fc074
JH
1532 if (idx2[off * 2])
1533 continue;
1534 /*
1535 * The real offset is ntohl(idx2[off * 2]) in high 4
1536 * octets, and ntohl(idx2[off * 2 + 1]) in low 4
1537 * octets. But idx2[off * 2] is Zero!!!
1538 */
1539 ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc);
1540 opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]);
1541 }
1542
1b5294de 1543 QSORT(opts->anomaly, opts->anomaly_nr, cmp_uint32);
3c9fc074
JH
1544}
1545
e337a04d
JH
1546static void read_idx_option(struct pack_idx_option *opts, const char *pack_name)
1547{
1548 struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1);
1549
1550 if (!p)
c2b97ecf 1551 die(_("Cannot open existing pack file '%s'"), pack_name);
e337a04d 1552 if (open_pack_index(p))
c2b97ecf 1553 die(_("Cannot open existing pack idx file for '%s'"), pack_name);
e337a04d
JH
1554
1555 /* Read the attributes from the existing idx file */
1556 opts->version = p->index_version;
1557
3c9fc074
JH
1558 if (opts->version == 2)
1559 read_v2_anomalous_offsets(p, opts);
1560
e337a04d
JH
1561 /*
1562 * Get rid of the idx file as we do not need it anymore.
1563 * NEEDSWORK: extract this bit from free_pack_by_name() in
1564 * sha1_file.c, perhaps? It shouldn't matter very much as we
1565 * know we haven't installed this pack (hence we never have
1566 * read anything from it).
1567 */
1568 close_pack_index(p);
1569 free(p);
1570}
1571
38a45561
JH
1572static void show_pack_info(int stat_only)
1573{
c6458e60 1574 int i, baseobjects = nr_objects - nr_ref_deltas - nr_ofs_deltas;
d1a0ed18
JH
1575 unsigned long *chain_histogram = NULL;
1576
1577 if (deepest_delta)
1578 chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long));
1579
38a45561
JH
1580 for (i = 0; i < nr_objects; i++) {
1581 struct object_entry *obj = &objects[i];
1582
d1a0ed18 1583 if (is_delta_type(obj->type))
41730576 1584 chain_histogram[obj_stat[i].delta_depth - 1]++;
38a45561
JH
1585 if (stat_only)
1586 continue;
1587 printf("%s %-6s %lu %lu %"PRIuMAX,
e6a492b7 1588 oid_to_hex(&obj->idx.oid),
38a45561
JH
1589 typename(obj->real_type), obj->size,
1590 (unsigned long)(obj[1].idx.offset - obj->idx.offset),
1591 (uintmax_t)obj->idx.offset);
1592 if (is_delta_type(obj->type)) {
41730576 1593 struct object_entry *bobj = &objects[obj_stat[i].base_object_no];
e6a492b7 1594 printf(" %u %s", obj_stat[i].delta_depth,
1595 oid_to_hex(&bobj->idx.oid));
38a45561
JH
1596 }
1597 putchar('\n');
1598 }
d1a0ed18
JH
1599
1600 if (baseobjects)
c2b97ecf
NTND
1601 printf_ln(Q_("non delta: %d object",
1602 "non delta: %d objects",
1603 baseobjects),
1604 baseobjects);
d1a0ed18
JH
1605 for (i = 0; i < deepest_delta; i++) {
1606 if (!chain_histogram[i])
1607 continue;
c2b97ecf
NTND
1608 printf_ln(Q_("chain length = %d: %lu object",
1609 "chain length = %d: %lu objects",
1610 chain_histogram[i]),
1611 i + 1,
1612 chain_histogram[i]);
d1a0ed18 1613 }
38a45561
JH
1614}
1615
bfee614a
JH
1616static const char *derive_filename(const char *pack_name, const char *suffix,
1617 struct strbuf *buf)
1618{
1619 size_t len;
1620 if (!strip_suffix(pack_name, ".pack", &len))
1621 die(_("packfile name '%s' does not end with '.pack'"),
1622 pack_name);
1623 strbuf_add(buf, pack_name, len);
1624 strbuf_addstr(buf, suffix);
1625 return buf->buf;
1626}
1627
3bb72562 1628int cmd_index_pack(int argc, const char **argv, const char *prefix)
9cf6d335 1629{
3aba2fdd 1630 int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
39539495 1631 const char *curr_index;
3bb72562 1632 const char *index_name = NULL, *pack_name = NULL;
b8077709 1633 const char *keep_name = NULL, *keep_msg = NULL;
592ce208
JK
1634 struct strbuf index_name_buf = STRBUF_INIT,
1635 keep_name_buf = STRBUF_INIT;
aa7e44bf 1636 struct pack_idx_entry **idx_objects;
ebcfb379 1637 struct pack_idx_option opts;
8522148f 1638 unsigned char pack_sha1[20];
c6807a40 1639 unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */
83558686 1640 int report_end_of_input = 0;
9cf6d335 1641
99caeed0
JN
1642 if (argc == 2 && !strcmp(argv[1], "-h"))
1643 usage(index_pack_usage);
1644
afc711b8 1645 check_replace_refs = 0;
22410549 1646 fsck_options.walk = mark_link;
6e2a09d2 1647
ebcfb379
JH
1648 reset_pack_idx_option(&opts);
1649 git_config(git_index_pack_config, &opts);
3f8099fc 1650 if (prefix && chdir(prefix))
c2b97ecf 1651 die(_("Cannot come back to cwd"));
4d00bda2 1652
9cf6d335 1653 for (i = 1; i < argc; i++) {
3bb72562 1654 const char *arg = argv[i];
9cf6d335
SV
1655
1656 if (*arg == '-') {
e42797f5
NP
1657 if (!strcmp(arg, "--stdin")) {
1658 from_stdin = 1;
636171cb
NP
1659 } else if (!strcmp(arg, "--fix-thin")) {
1660 fix_thin_pack = 1;
0153be05
MK
1661 } else if (!strcmp(arg, "--strict")) {
1662 strict = 1;
c6807a40 1663 do_fsck_object = 1;
5d477a33
JS
1664 } else if (skip_prefix(arg, "--strict=", &arg)) {
1665 strict = 1;
1666 do_fsck_object = 1;
1667 fsck_set_msg_types(&fsck_options, arg);
c6807a40
NTND
1668 } else if (!strcmp(arg, "--check-self-contained-and-connected")) {
1669 strict = 1;
1670 check_self_contained_and_connected = 1;
e337a04d
JH
1671 } else if (!strcmp(arg, "--verify")) {
1672 verify = 1;
38a45561
JH
1673 } else if (!strcmp(arg, "--verify-stat")) {
1674 verify = 1;
3aba2fdd 1675 show_stat = 1;
38a45561
JH
1676 } else if (!strcmp(arg, "--verify-stat-only")) {
1677 verify = 1;
3aba2fdd 1678 show_stat = 1;
38a45561 1679 stat_only = 1;
b8077709
SP
1680 } else if (!strcmp(arg, "--keep")) {
1681 keep_msg = "";
59556548 1682 } else if (starts_with(arg, "--keep=")) {
b8077709 1683 keep_msg = arg + 7;
59556548 1684 } else if (starts_with(arg, "--threads=")) {
b8a2486f
NTND
1685 char *end;
1686 nr_threads = strtoul(arg+10, &end, 0);
1687 if (!arg[10] || *end || nr_threads < 0)
1688 usage(index_pack_usage);
1689#ifdef NO_PTHREADS
1690 if (nr_threads != 1)
f350df42
NTND
1691 warning(_("no threads support, "
1692 "ignoring %s"), arg);
b8a2486f
NTND
1693 nr_threads = 1;
1694#endif
59556548 1695 } else if (starts_with(arg, "--pack_header=")) {
bed006fb
NP
1696 struct pack_header *hdr;
1697 char *c;
1698
1699 hdr = (struct pack_header *)input_buffer;
1700 hdr->hdr_signature = htonl(PACK_SIGNATURE);
1701 hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
1702 if (*c != ',')
c2b97ecf 1703 die(_("bad %s"), arg);
bed006fb
NP
1704 hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
1705 if (*c)
c2b97ecf 1706 die(_("bad %s"), arg);
bed006fb 1707 input_len = sizeof(*hdr);
3c9af366
NP
1708 } else if (!strcmp(arg, "-v")) {
1709 verbose = 1;
e376f17f
JK
1710 } else if (!strcmp(arg, "--show-resolving-progress")) {
1711 show_resolving_progress = 1;
83558686
JK
1712 } else if (!strcmp(arg, "--report-end-of-input")) {
1713 report_end_of_input = 1;
e42797f5 1714 } else if (!strcmp(arg, "-o")) {
9cf6d335
SV
1715 if (index_name || (i+1) >= argc)
1716 usage(index_pack_usage);
1717 index_name = argv[++i];
59556548 1718 } else if (starts_with(arg, "--index-version=")) {
4ba7d711 1719 char *c;
ebcfb379
JH
1720 opts.version = strtoul(arg + 16, &c, 10);
1721 if (opts.version > 2)
c2b97ecf 1722 die(_("bad %s"), arg);
4ba7d711 1723 if (*c == ',')
ebcfb379
JH
1724 opts.off32_limit = strtoul(c+1, &c, 0);
1725 if (*c || opts.off32_limit & 0x80000000)
c2b97ecf 1726 die(_("bad %s"), arg);
411481be
JK
1727 } else if (skip_prefix(arg, "--max-input-size=", &arg)) {
1728 max_input_size = strtoumax(arg, NULL, 10);
9cf6d335
SV
1729 } else
1730 usage(index_pack_usage);
1731 continue;
1732 }
1733
1734 if (pack_name)
1735 usage(index_pack_usage);
1736 pack_name = arg;
1737 }
1738
e42797f5 1739 if (!pack_name && !from_stdin)
9cf6d335 1740 usage(index_pack_usage);
636171cb 1741 if (fix_thin_pack && !from_stdin)
c2b97ecf 1742 die(_("--fix-thin cannot be used without --stdin"));
7176a314
JK
1743 if (from_stdin && !startup_info->have_repository)
1744 die(_("--stdin requires a git repository"));
bfee614a
JH
1745 if (!index_name && pack_name)
1746 index_name = derive_filename(pack_name, ".idx", &index_name_buf);
1747 if (keep_msg && !keep_name && pack_name)
1748 keep_name = derive_filename(pack_name, ".keep", &keep_name_buf);
1749
e337a04d
JH
1750 if (verify) {
1751 if (!index_name)
c2b97ecf 1752 die(_("--verify with no packfile name given"));
e337a04d 1753 read_idx_option(&opts, index_name);
68be2fea 1754 opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT;
e337a04d 1755 }
68be2fea
JH
1756 if (strict)
1757 opts.flags |= WRITE_IDX_STRICT;
9cf6d335 1758
b8a2486f
NTND
1759#ifndef NO_PTHREADS
1760 if (!nr_threads) {
1761 nr_threads = online_cpus();
1762 /* An experiment showed that more threads does not mean faster */
1763 if (nr_threads > 3)
1764 nr_threads = 3;
1765 }
1766#endif
1767
e42797f5 1768 curr_pack = open_pack_file(pack_name);
9cf6d335 1769 parse_pack_header();
50a6c8ef 1770 objects = xcalloc(st_add(nr_objects, 1), sizeof(struct object_entry));
41730576 1771 if (show_stat)
50a6c8ef 1772 obj_stat = xcalloc(st_add(nr_objects, 1), sizeof(struct object_stat));
c6458e60 1773 ofs_deltas = xcalloc(nr_objects, sizeof(struct ofs_delta_entry));
8522148f 1774 parse_pack_objects(pack_sha1);
83558686
JK
1775 if (report_end_of_input)
1776 write_in_full(2, "\0", 1);
5272f755
NTND
1777 resolve_deltas();
1778 conclude_pack(fix_thin_pack, curr_pack, pack_sha1);
c6458e60
NTND
1779 free(ofs_deltas);
1780 free(ref_deltas);
0153be05 1781 if (strict)
c6807a40 1782 foreign_nr = check_objects();
aa7e44bf 1783
3aba2fdd 1784 if (show_stat)
38a45561
JH
1785 show_pack_info(stat_only);
1786
b32fa95f 1787 ALLOC_ARRAY(idx_objects, nr_objects);
aa7e44bf
GB
1788 for (i = 0; i < nr_objects; i++)
1789 idx_objects[i] = &objects[i].idx;
ebcfb379 1790 curr_index = write_idx_file(index_name, idx_objects, nr_objects, &opts, pack_sha1);
aa7e44bf
GB
1791 free(idx_objects);
1792
e337a04d
JH
1793 if (!verify)
1794 final(pack_name, curr_pack,
1795 index_name, curr_index,
1796 keep_name, keep_msg,
1797 pack_sha1);
1798 else
1799 close(input_fd);
9cf6d335 1800 free(objects);
592ce208
JK
1801 strbuf_release(&index_name_buf);
1802 strbuf_release(&keep_name_buf);
c85228ed 1803 if (pack_name == NULL)
3bb72562 1804 free((void *) curr_pack);
c85228ed 1805 if (index_name == NULL)
3bb72562 1806 free((void *) curr_index);
9cf6d335 1807
c6807a40
NTND
1808 /*
1809 * Let the caller know this pack is not self contained
1810 */
1811 if (check_self_contained_and_connected && foreign_nr)
1812 return 1;
1813
9cf6d335
SV
1814 return 0;
1815}