sha1_file: convert check_sha1_signature to struct object_id
[git/git.git] / builtin / index-pack.c
CommitLineData
2ad9d4cb 1#include "builtin.h"
b2141fc1 2#include "config.h"
9cf6d335
SV
3#include "delta.h"
4#include "pack.h"
5#include "csum-file.h"
8e440259
PE
6#include "blob.h"
7#include "commit.h"
8#include "tag.h"
9#include "tree.h"
96a02f8f 10#include "progress.h"
0153be05 11#include "fsck.h"
2fb3f6db 12#include "exec_cmd.h"
4614043c 13#include "streaming.h"
b8a2486f 14#include "thread-utils.h"
4f39cd82 15#include "packfile.h"
9cf6d335
SV
16
17static const char index_pack_usage[] =
e337a04d 18"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
9cf6d335 19
9cba13ca 20struct object_entry {
aa7e44bf 21 struct pack_idx_entry idx;
2d477051 22 unsigned long size;
41730576
NTND
23 unsigned char hdr_size;
24 signed char type;
25 signed char real_type;
9cf6d335
SV
26};
27
41730576 28struct object_stat {
38a45561
JH
29 unsigned delta_depth;
30 int base_object_no;
53dda6ff
NP
31};
32
f41aebd4 33struct base_data {
4a438cab
SP
34 struct base_data *base;
35 struct base_data *child;
03993e13 36 struct object_entry *obj;
f41aebd4
SP
37 void *data;
38 unsigned long size;
2baad220
NTND
39 int ref_first, ref_last;
40 int ofs_first, ofs_last;
f41aebd4
SP
41};
42
b8a2486f
NTND
43struct thread_local {
44#ifndef NO_PTHREADS
45 pthread_t thread;
46#endif
47 struct base_data *base_cache;
48 size_t base_cache_used;
39539495 49 int pack_fd;
b8a2486f
NTND
50};
51
0153be05
MK
52#define FLAG_LINK (1u<<20)
53#define FLAG_CHECKED (1u<<21)
54
c6458e60
NTND
55struct ofs_delta_entry {
56 off_t offset;
57 int obj_no;
58};
59
60struct ref_delta_entry {
af8caf33 61 struct object_id oid;
636171cb 62 int obj_no;
9cf6d335
SV
63};
64
9cf6d335 65static struct object_entry *objects;
41730576 66static struct object_stat *obj_stat;
c6458e60
NTND
67static struct ofs_delta_entry *ofs_deltas;
68static struct ref_delta_entry *ref_deltas;
b8a2486f 69static struct thread_local nothread_data;
9cf6d335 70static int nr_objects;
c6458e60
NTND
71static int nr_ofs_deltas;
72static int nr_ref_deltas;
73static int ref_deltas_alloc;
636171cb 74static int nr_resolved_deltas;
b8a2486f 75static int nr_threads;
9cf6d335 76
e42797f5 77static int from_stdin;
0153be05 78static int strict;
c6807a40 79static int do_fsck_object;
22410549 80static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
3c9af366 81static int verbose;
e376f17f 82static int show_resolving_progress;
3aba2fdd 83static int show_stat;
c6807a40 84static int check_self_contained_and_connected;
3c9af366 85
dc6a0757 86static struct progress *progress;
e42797f5 87
2d477051
NP
88/* We always read in 4kB chunks. */
89static unsigned char input_buffer[4096];
d7dd0223
NP
90static unsigned int input_offset, input_len;
91static off_t consumed_bytes;
411481be 92static off_t max_input_size;
d1a0ed18 93static unsigned deepest_delta;
454253f0 94static git_hash_ctx input_ctx;
ee5743ce 95static uint32_t input_crc32;
39539495
NTND
96static int input_fd, output_fd;
97static const char *curr_pack;
2d477051 98
b8a2486f
NTND
99#ifndef NO_PTHREADS
100
101static struct thread_local *thread_data;
102static int nr_dispatched;
103static int threads_active;
104
105static pthread_mutex_t read_mutex;
106#define read_lock() lock_mutex(&read_mutex)
107#define read_unlock() unlock_mutex(&read_mutex)
108
109static pthread_mutex_t counter_mutex;
110#define counter_lock() lock_mutex(&counter_mutex)
111#define counter_unlock() unlock_mutex(&counter_mutex)
112
113static pthread_mutex_t work_mutex;
114#define work_lock() lock_mutex(&work_mutex)
115#define work_unlock() unlock_mutex(&work_mutex)
116
3aba2fdd
NTND
117static pthread_mutex_t deepest_delta_mutex;
118#define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
119#define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
120
ab791dd1
JK
121static pthread_mutex_t type_cas_mutex;
122#define type_cas_lock() lock_mutex(&type_cas_mutex)
123#define type_cas_unlock() unlock_mutex(&type_cas_mutex)
124
b8a2486f
NTND
125static pthread_key_t key;
126
127static inline void lock_mutex(pthread_mutex_t *mutex)
128{
129 if (threads_active)
130 pthread_mutex_lock(mutex);
131}
132
133static inline void unlock_mutex(pthread_mutex_t *mutex)
134{
135 if (threads_active)
136 pthread_mutex_unlock(mutex);
137}
138
139/*
140 * Mutex and conditional variable can't be statically-initialized on Windows.
141 */
142static void init_thread(void)
143{
39539495 144 int i;
b8a2486f
NTND
145 init_recursive_mutex(&read_mutex);
146 pthread_mutex_init(&counter_mutex, NULL);
147 pthread_mutex_init(&work_mutex, NULL);
ab791dd1 148 pthread_mutex_init(&type_cas_mutex, NULL);
3aba2fdd
NTND
149 if (show_stat)
150 pthread_mutex_init(&deepest_delta_mutex, NULL);
b8a2486f
NTND
151 pthread_key_create(&key, NULL);
152 thread_data = xcalloc(nr_threads, sizeof(*thread_data));
39539495
NTND
153 for (i = 0; i < nr_threads; i++) {
154 thread_data[i].pack_fd = open(curr_pack, O_RDONLY);
155 if (thread_data[i].pack_fd == -1)
156 die_errno(_("unable to open %s"), curr_pack);
157 }
158
b8a2486f
NTND
159 threads_active = 1;
160}
161
162static void cleanup_thread(void)
163{
39539495 164 int i;
b8a2486f
NTND
165 if (!threads_active)
166 return;
167 threads_active = 0;
168 pthread_mutex_destroy(&read_mutex);
169 pthread_mutex_destroy(&counter_mutex);
170 pthread_mutex_destroy(&work_mutex);
ab791dd1 171 pthread_mutex_destroy(&type_cas_mutex);
3aba2fdd
NTND
172 if (show_stat)
173 pthread_mutex_destroy(&deepest_delta_mutex);
39539495
NTND
174 for (i = 0; i < nr_threads; i++)
175 close(thread_data[i].pack_fd);
b8a2486f
NTND
176 pthread_key_delete(key);
177 free(thread_data);
178}
179
180#else
181
182#define read_lock()
183#define read_unlock()
184
185#define counter_lock()
186#define counter_unlock()
187
188#define work_lock()
189#define work_unlock()
190
3aba2fdd
NTND
191#define deepest_delta_lock()
192#define deepest_delta_unlock()
193
e0e21283
EB
194#define type_cas_lock()
195#define type_cas_unlock()
196
b8a2486f
NTND
197#endif
198
199
22410549 200static int mark_link(struct object *obj, int type, void *data, struct fsck_options *options)
0153be05
MK
201{
202 if (!obj)
203 return -1;
204
205 if (type != OBJ_ANY && obj->type != type)
f2fd0760 206 die(_("object type mismatch at %s"), oid_to_hex(&obj->oid));
0153be05
MK
207
208 obj->flags |= FLAG_LINK;
209 return 0;
210}
211
212/* The content of each linked object must have been checked
213 or it must be already present in the object database */
c6807a40 214static unsigned check_object(struct object *obj)
0153be05
MK
215{
216 if (!obj)
c6807a40 217 return 0;
0153be05
MK
218
219 if (!(obj->flags & FLAG_LINK))
c6807a40 220 return 0;
0153be05
MK
221
222 if (!(obj->flags & FLAG_CHECKED)) {
223 unsigned long size;
ed1c9977 224 int type = sha1_object_info(obj->oid.hash, &size);
77583e77
JK
225 if (type <= 0)
226 die(_("did not receive expected object %s"),
f2fd0760 227 oid_to_hex(&obj->oid));
77583e77
JK
228 if (type != obj->type)
229 die(_("object %s: expected type %s, found %s"),
f2fd0760 230 oid_to_hex(&obj->oid),
debca9d2 231 type_name(obj->type), type_name(type));
0153be05 232 obj->flags |= FLAG_CHECKED;
c6807a40 233 return 1;
0153be05 234 }
c6807a40
NTND
235
236 return 0;
0153be05
MK
237}
238
c6807a40 239static unsigned check_objects(void)
0153be05 240{
c6807a40 241 unsigned i, max, foreign_nr = 0;
0153be05
MK
242
243 max = get_max_object_index();
244 for (i = 0; i < max; i++)
c6807a40
NTND
245 foreign_nr += check_object(get_indexed_object(i));
246 return foreign_nr;
0153be05
MK
247}
248
249
636171cb 250/* Discard current buffer used content. */
a6e8a767 251static void flush(void)
636171cb
NP
252{
253 if (input_offset) {
254 if (output_fd >= 0)
255 write_or_die(output_fd, input_buffer, input_offset);
454253f0 256 the_hash_algo->update_fn(&input_ctx, input_buffer, input_offset);
554a2636 257 memmove(input_buffer, input_buffer + input_offset, input_len);
636171cb
NP
258 input_offset = 0;
259 }
260}
261
2d477051
NP
262/*
263 * Make sure at least "min" bytes are available in the buffer, and
264 * return the pointer to the buffer.
265 */
b89c4e93 266static void *fill(int min)
9cf6d335 267{
2d477051
NP
268 if (min <= input_len)
269 return input_buffer + input_offset;
270 if (min > sizeof(input_buffer))
c2b97ecf
NTND
271 die(Q_("cannot fill %d byte",
272 "cannot fill %d bytes",
273 min),
274 min);
636171cb 275 flush();
2d477051 276 do {
8a912bcb 277 ssize_t ret = xread(input_fd, input_buffer + input_len,
2d477051
NP
278 sizeof(input_buffer) - input_len);
279 if (ret <= 0) {
280 if (!ret)
c2b97ecf
NTND
281 die(_("early EOF"));
282 die_errno(_("read error on input"));
2d477051
NP
283 }
284 input_len += ret;
218558af
NP
285 if (from_stdin)
286 display_throughput(progress, consumed_bytes + input_len);
2d477051
NP
287 } while (input_len < min);
288 return input_buffer;
289}
290
291static void use(int bytes)
292{
293 if (bytes > input_len)
c2b97ecf 294 die(_("used more bytes than were available"));
ee5743ce 295 input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
2d477051
NP
296 input_len -= bytes;
297 input_offset += bytes;
d7dd0223
NP
298
299 /* make sure off_t is sufficiently large not to wrap */
c03c8315 300 if (signed_add_overflows(consumed_bytes, bytes))
c2b97ecf 301 die(_("pack too large for current definition of off_t"));
2d477051 302 consumed_bytes += bytes;
411481be
JK
303 if (max_input_size && consumed_bytes > max_input_size)
304 die(_("pack exceeds maximum allowed size"));
2d477051 305}
9cf6d335 306
3bb72562 307static const char *open_pack_file(const char *pack_name)
2d477051 308{
e42797f5
NP
309 if (from_stdin) {
310 input_fd = 0;
311 if (!pack_name) {
594fa999
JK
312 struct strbuf tmp_file = STRBUF_INIT;
313 output_fd = odb_mkstemp(&tmp_file,
6e180cdc 314 "pack/tmp_pack_XXXXXX");
594fa999 315 pack_name = strbuf_detach(&tmp_file, NULL);
892e723a 316 } else {
e42797f5 317 output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
892e723a
JK
318 if (output_fd < 0)
319 die_errno(_("unable to create '%s'"), pack_name);
320 }
39539495 321 nothread_data.pack_fd = output_fd;
e42797f5
NP
322 } else {
323 input_fd = open(pack_name, O_RDONLY);
324 if (input_fd < 0)
c2b97ecf 325 die_errno(_("cannot open packfile '%s'"), pack_name);
e42797f5 326 output_fd = -1;
39539495 327 nothread_data.pack_fd = input_fd;
e42797f5 328 }
454253f0 329 the_hash_algo->init_fn(&input_ctx);
e42797f5 330 return pack_name;
9cf6d335
SV
331}
332
333static void parse_pack_header(void)
334{
2d477051 335 struct pack_header *hdr = fill(sizeof(struct pack_header));
9cf6d335
SV
336
337 /* Header consistency check */
9cf6d335 338 if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
c2b97ecf 339 die(_("pack signature mismatch"));
d60fc1c8 340 if (!pack_version_ok(hdr->hdr_version))
f350df42 341 die(_("pack version %"PRIu32" unsupported"),
6e1c2344 342 ntohl(hdr->hdr_version));
9cf6d335
SV
343
344 nr_objects = ntohl(hdr->hdr_entries);
2d477051 345 use(sizeof(struct pack_header));
9cf6d335
SV
346}
347
fd3e6747 348static NORETURN void bad_object(off_t offset, const char *format,
a4f3131c 349 ...) __attribute__((format (printf, 2, 3)));
9cf6d335 350
fd3e6747 351static NORETURN void bad_object(off_t offset, const char *format, ...)
9cf6d335
SV
352{
353 va_list params;
354 char buf[1024];
355
356 va_start(params, format);
357 vsnprintf(buf, sizeof(buf), format, params);
358 va_end(params);
fd3e6747
NTND
359 die(_("pack has bad object at offset %"PRIuMAX": %s"),
360 (uintmax_t)offset, buf);
9cf6d335
SV
361}
362
b8a2486f
NTND
363static inline struct thread_local *get_thread_data(void)
364{
365#ifndef NO_PTHREADS
366 if (threads_active)
367 return pthread_getspecific(key);
368 assert(!threads_active &&
369 "This should only be reached when all threads are gone");
370#endif
371 return &nothread_data;
372}
373
374#ifndef NO_PTHREADS
375static void set_thread_data(struct thread_local *data)
376{
377 if (threads_active)
378 pthread_setspecific(key, data);
379}
380#endif
381
2baad220
NTND
382static struct base_data *alloc_base_data(void)
383{
51a60f5b 384 struct base_data *base = xcalloc(1, sizeof(struct base_data));
2baad220
NTND
385 base->ref_last = -1;
386 base->ofs_last = -1;
387 return base;
388}
389
6a87ed97
NP
390static void free_base_data(struct base_data *c)
391{
392 if (c->data) {
6a83d902 393 FREE_AND_NULL(c->data);
b8a2486f 394 get_thread_data()->base_cache_used -= c->size;
6a87ed97
NP
395 }
396}
397
92392b4a
SP
398static void prune_base_data(struct base_data *retain)
399{
8e24cbae 400 struct base_data *b;
b8a2486f
NTND
401 struct thread_local *data = get_thread_data();
402 for (b = data->base_cache;
403 data->base_cache_used > delta_base_cache_limit && b;
92392b4a 404 b = b->child) {
6a87ed97
NP
405 if (b->data && b != retain)
406 free_base_data(b);
92392b4a
SP
407 }
408}
409
4a438cab
SP
410static void link_base_data(struct base_data *base, struct base_data *c)
411{
412 if (base)
413 base->child = c;
414 else
b8a2486f 415 get_thread_data()->base_cache = c;
4a438cab
SP
416
417 c->base = base;
418 c->child = NULL;
9441b61d 419 if (c->data)
b8a2486f 420 get_thread_data()->base_cache_used += c->size;
92392b4a 421 prune_base_data(c);
4a438cab
SP
422}
423
424static void unlink_base_data(struct base_data *c)
425{
426 struct base_data *base = c->base;
427 if (base)
428 base->child = NULL;
429 else
b8a2486f 430 get_thread_data()->base_cache = NULL;
6a87ed97 431 free_base_data(c);
4a438cab
SP
432}
433
681b07de
NTND
434static int is_delta_type(enum object_type type)
435{
436 return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
437}
438
da49a7da 439static void *unpack_entry_data(off_t offset, unsigned long size,
454253f0 440 enum object_type type, struct object_id *oid)
9cf6d335 441{
9ec2dde9 442 static char fixed_buf[8192];
7ce4721a 443 int status;
ef49a7a0 444 git_zstream stream;
9ec2dde9 445 void *buf;
454253f0 446 git_hash_ctx c;
681b07de
NTND
447 char hdr[32];
448 int hdrlen;
449
450 if (!is_delta_type(type)) {
debca9d2 451 hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), size) + 1;
454253f0 452 the_hash_algo->init_fn(&c);
453 the_hash_algo->update_fn(&c, hdr, hdrlen);
681b07de 454 } else
454253f0 455 oid = NULL;
9ec2dde9
NTND
456 if (type == OBJ_BLOB && size > big_file_threshold)
457 buf = fixed_buf;
458 else
a1e920a0 459 buf = xmallocz(size);
9cf6d335
SV
460
461 memset(&stream, 0, sizeof(stream));
7ce4721a 462 git_inflate_init(&stream);
9cf6d335 463 stream.next_out = buf;
9ec2dde9 464 stream.avail_out = buf == fixed_buf ? sizeof(fixed_buf) : size;
9cf6d335 465
7ce4721a 466 do {
681b07de 467 unsigned char *last_out = stream.next_out;
2d477051
NP
468 stream.next_in = fill(1);
469 stream.avail_in = input_len;
7ce4721a
NP
470 status = git_inflate(&stream, 0);
471 use(input_len - stream.avail_in);
454253f0 472 if (oid)
473 the_hash_algo->update_fn(&c, last_out, stream.next_out - last_out);
9ec2dde9
NTND
474 if (buf == fixed_buf) {
475 stream.next_out = buf;
476 stream.avail_out = sizeof(fixed_buf);
477 }
7ce4721a
NP
478 } while (status == Z_OK);
479 if (stream.total_out != size || status != Z_STREAM_END)
c2b97ecf 480 bad_object(offset, _("inflate returned %d"), status);
39c68542 481 git_inflate_end(&stream);
454253f0 482 if (oid)
483 the_hash_algo->final_fn(oid->hash, &c);
9ec2dde9 484 return buf == fixed_buf ? NULL : buf;
9cf6d335
SV
485}
486
681b07de 487static void *unpack_raw_entry(struct object_entry *obj,
c6458e60 488 off_t *ofs_offset,
454253f0 489 struct object_id *ref_oid,
490 struct object_id *oid)
9cf6d335 491{
48fb7deb
LT
492 unsigned char *p;
493 unsigned long size, c;
d7dd0223 494 off_t base_offset;
9cf6d335 495 unsigned shift;
ee5743ce 496 void *data;
9cf6d335 497
aa7e44bf 498 obj->idx.offset = consumed_bytes;
1e4cd68c 499 input_crc32 = crc32(0, NULL, 0);
2d477051
NP
500
501 p = fill(1);
502 c = *p;
503 use(1);
504 obj->type = (c >> 4) & 7;
9cf6d335
SV
505 size = (c & 15);
506 shift = 4;
507 while (c & 0x80) {
2d477051
NP
508 p = fill(1);
509 c = *p;
510 use(1);
48fb7deb 511 size += (c & 0x7f) << shift;
9cf6d335
SV
512 shift += 7;
513 }
2d477051 514 obj->size = size;
9cf6d335 515
2d477051 516 switch (obj->type) {
eb32d236 517 case OBJ_REF_DELTA:
454253f0 518 hashcpy(ref_oid->hash, fill(the_hash_algo->rawsz));
519 use(the_hash_algo->rawsz);
53dda6ff
NP
520 break;
521 case OBJ_OFS_DELTA:
2d477051
NP
522 p = fill(1);
523 c = *p;
524 use(1);
53dda6ff
NP
525 base_offset = c & 127;
526 while (c & 128) {
527 base_offset += 1;
8723f216 528 if (!base_offset || MSB(base_offset, 7))
c2b97ecf 529 bad_object(obj->idx.offset, _("offset value overflow for delta base object"));
2d477051
NP
530 p = fill(1);
531 c = *p;
532 use(1);
53dda6ff
NP
533 base_offset = (base_offset << 7) + (c & 127);
534 }
c6458e60
NTND
535 *ofs_offset = obj->idx.offset - base_offset;
536 if (*ofs_offset <= 0 || *ofs_offset >= obj->idx.offset)
c2b97ecf 537 bad_object(obj->idx.offset, _("delta base offset is out of bound"));
53dda6ff 538 break;
9cf6d335
SV
539 case OBJ_COMMIT:
540 case OBJ_TREE:
541 case OBJ_BLOB:
542 case OBJ_TAG:
9cf6d335
SV
543 break;
544 default:
c2b97ecf 545 bad_object(obj->idx.offset, _("unknown object type %d"), obj->type);
9cf6d335 546 }
aa7e44bf 547 obj->hdr_size = consumed_bytes - obj->idx.offset;
2d477051 548
454253f0 549 data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, oid);
aa7e44bf 550 obj->idx.crc32 = input_crc32;
ee5743ce 551 return data;
2d477051
NP
552}
553
8a2e163c
NTND
554static void *unpack_data(struct object_entry *obj,
555 int (*consume)(const unsigned char *, unsigned long, void *),
556 void *cb_data)
2d477051 557{
a91ef6e7 558 off_t from = obj[0].idx.offset + obj[0].hdr_size;
7171a0b0 559 off_t len = obj[1].idx.offset - from;
776ea370 560 unsigned char *data, *inbuf;
ef49a7a0 561 git_zstream stream;
776ea370 562 int status;
9cf6d335 563
a1e920a0 564 data = xmallocz(consume ? 64*1024 : obj->size);
7171a0b0 565 inbuf = xmalloc((len < 64*1024) ? (int)len : 64*1024);
776ea370 566
2d477051 567 memset(&stream, 0, sizeof(stream));
776ea370 568 git_inflate_init(&stream);
2d477051 569 stream.next_out = data;
8a2e163c 570 stream.avail_out = consume ? 64*1024 : obj->size;
776ea370
NP
571
572 do {
7171a0b0 573 ssize_t n = (len < 64*1024) ? (ssize_t)len : 64*1024;
53f52cd9 574 n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
776ea370 575 if (n < 0)
c2b97ecf 576 die_errno(_("cannot pread pack file"));
776ea370 577 if (!n)
7171a0b0
NTND
578 die(Q_("premature end of pack file, %"PRIuMAX" byte missing",
579 "premature end of pack file, %"PRIuMAX" bytes missing",
580 (unsigned int)len),
581 (uintmax_t)len);
776ea370
NP
582 from += n;
583 len -= n;
584 stream.next_in = inbuf;
585 stream.avail_in = n;
f8b09038
JK
586 if (!consume)
587 status = git_inflate(&stream, 0);
588 else {
589 do {
590 status = git_inflate(&stream, 0);
591 if (consume(data, stream.next_out - data, cb_data)) {
592 free(inbuf);
593 free(data);
594 return NULL;
595 }
596 stream.next_out = data;
597 stream.avail_out = 64*1024;
598 } while (status == Z_OK && stream.avail_in);
8a2e163c 599 }
776ea370
NP
600 } while (len && status == Z_OK && !stream.avail_in);
601
602 /* This has been inflated OK when first encountered, so... */
603 if (status != Z_STREAM_END || stream.total_out != obj->size)
c2b97ecf 604 die(_("serious inflate inconsistency"));
776ea370
NP
605
606 git_inflate_end(&stream);
607 free(inbuf);
8a2e163c 608 if (consume) {
6a83d902 609 FREE_AND_NULL(data);
8a2e163c 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) {
19716b21 636 int next = first + (last - first) / 2;
c6458e60
NTND
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
af8caf33 674static int compare_ref_delta_bases(const struct object_id *oid1,
675 const struct object_id *oid2,
c6458e60
NTND
676 enum object_type type1,
677 enum object_type type2)
678{
679 int cmp = type1 - type2;
680 if (cmp)
681 return cmp;
af8caf33 682 return oidcmp(oid1, oid2);
c6458e60
NTND
683}
684
af8caf33 685static int find_ref_delta(const struct object_id *oid, enum object_type type)
c6458e60
NTND
686{
687 int first = 0, last = nr_ref_deltas;
688
689 while (first < last) {
19716b21 690 int next = first + (last - first) / 2;
c6458e60
NTND
691 struct ref_delta_entry *delta = &ref_deltas[next];
692 int cmp;
693
af8caf33 694 cmp = compare_ref_delta_bases(oid, &delta->oid,
c6458e60
NTND
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
af8caf33 707static void find_ref_delta_children(const struct object_id *oid,
c6458e60
NTND
708 int *first_index, int *last_index,
709 enum object_type type)
710{
af8caf33 711 int first = find_ref_delta(oid, type);
c6458e60
NTND
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 }
af8caf33 720 while (first > 0 && !oidcmp(&ref_deltas[first - 1].oid, oid))
c6458e60 721 --first;
af8caf33 722 while (last < end && !oidcmp(&ref_deltas[last + 1].oid, oid))
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,
3e930981 788 const struct object_id *oid)
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();
e83e71c5
JT
797 collision_test_needed =
798 has_sha1_file_with_flags(oid->hash, OBJECT_INFO_QUICK);
29401e15
JK
799 read_unlock();
800 }
4614043c
NTND
801
802 if (collision_test_needed && !data) {
803 read_lock();
804 if (!check_collison(obj_entry))
805 collision_test_needed = 0;
806 read_unlock();
807 }
808 if (collision_test_needed) {
8685da42
NP
809 void *has_data;
810 enum object_type has_type;
811 unsigned long has_size;
4614043c 812 read_lock();
3e930981 813 has_type = sha1_object_info(oid->hash, &has_size);
51054177 814 if (has_type < 0)
3e930981 815 die(_("cannot read existing object info %s"), oid_to_hex(oid));
4614043c 816 if (has_type != type || has_size != size)
3e930981 817 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid));
818 has_data = read_sha1_file(oid->hash, &has_type, &has_size);
b8a2486f 819 read_unlock();
4614043c
NTND
820 if (!data)
821 data = new_data = get_data_from_pack(obj_entry);
8685da42 822 if (!has_data)
3e930981 823 die(_("cannot read existing object %s"), oid_to_hex(oid));
8685da42
NP
824 if (size != has_size || type != has_type ||
825 memcmp(data, has_data, size) != 0)
3e930981 826 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid));
bbf4b41b 827 free(has_data);
4614043c 828 }
b8a2486f 829
0153be05 830 if (strict) {
b8a2486f 831 read_lock();
0153be05 832 if (type == OBJ_BLOB) {
3aca1fc6 833 struct blob *blob = lookup_blob(oid);
0153be05
MK
834 if (blob)
835 blob->object.flags |= FLAG_CHECKED;
836 else
3e930981 837 die(_("invalid blob object %s"), oid_to_hex(oid));
0153be05
MK
838 } else {
839 struct object *obj;
840 int eaten;
841 void *buf = (void *) data;
842
920734b0 843 assert(data && "data can only be NULL for large _blobs_");
9ec2dde9 844
0153be05
MK
845 /*
846 * we do not need to free the memory here, as the
847 * buf is deleted by the caller.
848 */
c251c83d 849 obj = parse_object_buffer(oid, type, size, buf,
850 &eaten);
0153be05 851 if (!obj)
debca9d2 852 die(_("invalid %s"), type_name(type));
c6807a40 853 if (do_fsck_object &&
22410549 854 fsck_object(obj, buf, size, &fsck_options))
c2b97ecf 855 die(_("Error in object"));
22410549 856 if (fsck_walk(obj, NULL, &fsck_options))
f2fd0760 857 die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj->oid));
0153be05
MK
858
859 if (obj->type == OBJ_TREE) {
860 struct tree *item = (struct tree *) obj;
861 item->buffer = NULL;
6e454b9a 862 obj->parsed = 0;
0153be05
MK
863 }
864 if (obj->type == OBJ_COMMIT) {
865 struct commit *commit = (struct commit *) obj;
8597ea3a 866 if (detach_commit_buffer(commit, NULL) != data)
0fb370da 867 die("BUG: parse_object_buffer transmogrified our buffer");
0153be05
MK
868 }
869 obj->flags |= FLAG_CHECKED;
870 }
b8a2486f 871 read_unlock();
0153be05 872 }
9ec2dde9
NTND
873
874 free(new_data);
9cf6d335
SV
875}
876
20e95d0a
NTND
877/*
878 * This function is part of find_unresolved_deltas(). There are two
879 * walkers going in the opposite ways.
880 *
881 * The first one in find_unresolved_deltas() traverses down from
882 * parent node to children, deflating nodes along the way. However,
883 * memory for deflated nodes is limited by delta_base_cache_limit, so
884 * at some point parent node's deflated content may be freed.
885 *
886 * The second walker is this function, which goes from current node up
887 * to top parent if necessary to deflate the node. In normal
888 * situation, its parent node would be already deflated, so it just
889 * needs to apply delta.
890 *
891 * In the worst case scenario, parent node is no longer deflated because
892 * we're running out of delta_base_cache_limit; we need to re-deflate
893 * parents, possibly up to the top base.
894 *
895 * All deflated objects here are subject to be freed if we exceed
896 * delta_base_cache_limit, just like in find_unresolved_deltas(), we
897 * just need to make sure the last node is not freed.
898 */
92392b4a
SP
899static void *get_base_data(struct base_data *c)
900{
901 if (!c->data) {
902 struct object_entry *obj = c->obj;
20e95d0a
NTND
903 struct base_data **delta = NULL;
904 int delta_nr = 0, delta_alloc = 0;
92392b4a 905
20e95d0a
NTND
906 while (is_delta_type(c->obj->type) && !c->data) {
907 ALLOC_GROW(delta, delta_nr + 1, delta_alloc);
908 delta[delta_nr++] = c;
909 c = c->base;
910 }
911 if (!delta_nr) {
912 c->data = get_data_from_pack(obj);
913 c->size = obj->size;
b8a2486f 914 get_thread_data()->base_cache_used += c->size;
20e95d0a
NTND
915 prune_base_data(c);
916 }
917 for (; delta_nr > 0; delta_nr--) {
918 void *base, *raw;
919 c = delta[delta_nr - 1];
920 obj = c->obj;
921 base = get_base_data(c->base);
922 raw = get_data_from_pack(obj);
92392b4a
SP
923 c->data = patch_delta(
924 base, c->base->size,
925 raw, obj->size,
926 &c->size);
927 free(raw);
928 if (!c->data)
c2b97ecf 929 bad_object(obj->idx.offset, _("failed to apply delta"));
b8a2486f 930 get_thread_data()->base_cache_used += c->size;
20e95d0a 931 prune_base_data(c);
9441b61d 932 }
20e95d0a 933 free(delta);
92392b4a
SP
934 }
935 return c->data;
936}
937
f41aebd4 938static void resolve_delta(struct object_entry *delta_obj,
9441b61d 939 struct base_data *base, struct base_data *result)
9cf6d335 940{
ce3f6dc6 941 void *base_data, *delta_data;
9cf6d335 942
3aba2fdd 943 if (show_stat) {
41730576
NTND
944 int i = delta_obj - objects;
945 int j = base->obj - objects;
946 obj_stat[i].delta_depth = obj_stat[j].delta_depth + 1;
3aba2fdd 947 deepest_delta_lock();
41730576
NTND
948 if (deepest_delta < obj_stat[i].delta_depth)
949 deepest_delta = obj_stat[i].delta_depth;
3aba2fdd 950 deepest_delta_unlock();
41730576 951 obj_stat[i].base_object_no = j;
3aba2fdd 952 }
636171cb 953 delta_data = get_data_from_pack(delta_obj);
ce3f6dc6 954 base_data = get_base_data(base);
9441b61d 955 result->obj = delta_obj;
ce3f6dc6
NP
956 result->data = patch_delta(base_data, base->size,
957 delta_data, delta_obj->size, &result->size);
9cf6d335 958 free(delta_data);
9441b61d 959 if (!result->data)
c2b97ecf 960 bad_object(delta_obj->idx.offset, _("failed to apply delta"));
f070facc 961 hash_object_file(result->data, result->size,
169c9c01 962 type_name(delta_obj->real_type), &delta_obj->idx.oid);
9ec2dde9 963 sha1_object(result->data, NULL, result->size, delta_obj->real_type,
3e930981 964 &delta_obj->idx.oid);
b8a2486f 965 counter_lock();
636171cb 966 nr_resolved_deltas++;
b8a2486f 967 counter_unlock();
9441b61d
NP
968}
969
ab791dd1
JK
970/*
971 * Standard boolean compare-and-swap: atomically check whether "*type" is
972 * "want"; if so, swap in "set" and return true. Otherwise, leave it untouched
973 * and return false.
974 */
41730576 975static int compare_and_swap_type(signed char *type,
ab791dd1
JK
976 enum object_type want,
977 enum object_type set)
978{
979 enum object_type old;
980
981 type_cas_lock();
982 old = *type;
983 if (old == want)
984 *type = set;
985 type_cas_unlock();
986
987 return old == want;
988}
989
2baad220
NTND
990static struct base_data *find_unresolved_deltas_1(struct base_data *base,
991 struct base_data *prev_base)
9441b61d 992{
2baad220 993 if (base->ref_last == -1 && base->ofs_last == -1) {
af8caf33 994 find_ref_delta_children(&base->obj->idx.oid,
c6458e60
NTND
995 &base->ref_first, &base->ref_last,
996 OBJ_REF_DELTA);
9441b61d 997
c6458e60
NTND
998 find_ofs_delta_children(base->obj->idx.offset,
999 &base->ofs_first, &base->ofs_last,
1000 OBJ_OFS_DELTA);
4a438cab 1001
2baad220
NTND
1002 if (base->ref_last == -1 && base->ofs_last == -1) {
1003 free(base->data);
1004 return NULL;
1005 }
53dda6ff 1006
2baad220
NTND
1007 link_base_data(prev_base, base);
1008 }
4a438cab 1009
2baad220 1010 if (base->ref_first <= base->ref_last) {
c6458e60 1011 struct object_entry *child = objects + ref_deltas[base->ref_first].obj_no;
2baad220 1012 struct base_data *result = alloc_base_data();
7218a215 1013
ab791dd1
JK
1014 if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA,
1015 base->obj->real_type))
1016 die("BUG: child->real_type != OBJ_REF_DELTA");
1017
2baad220
NTND
1018 resolve_delta(child, base, result);
1019 if (base->ref_first == base->ref_last && base->ofs_last == -1)
7218a215 1020 free_base_data(base);
2baad220
NTND
1021
1022 base->ref_first++;
1023 return result;
53dda6ff
NP
1024 }
1025
2baad220 1026 if (base->ofs_first <= base->ofs_last) {
c6458e60 1027 struct object_entry *child = objects + ofs_deltas[base->ofs_first].obj_no;
2baad220 1028 struct base_data *result = alloc_base_data();
7218a215
JH
1029
1030 assert(child->real_type == OBJ_OFS_DELTA);
ab791dd1 1031 child->real_type = base->obj->real_type;
2baad220
NTND
1032 resolve_delta(child, base, result);
1033 if (base->ofs_first == base->ofs_last)
7218a215 1034 free_base_data(base);
2baad220
NTND
1035
1036 base->ofs_first++;
1037 return result;
9cf6d335 1038 }
53dda6ff 1039
9441b61d 1040 unlink_base_data(base);
2baad220
NTND
1041 return NULL;
1042}
1043
1044static void find_unresolved_deltas(struct base_data *base)
1045{
1046 struct base_data *new_base, *prev_base = NULL;
1047 for (;;) {
1048 new_base = find_unresolved_deltas_1(base, prev_base);
1049
1050 if (new_base) {
1051 prev_base = base;
1052 base = new_base;
1053 } else {
1054 free(base);
1055 base = prev_base;
1056 if (!base)
1057 return;
1058 prev_base = base->base;
1059 }
1060 }
9cf6d335
SV
1061}
1062
c6458e60 1063static int compare_ofs_delta_entry(const void *a, const void *b)
9cf6d335 1064{
c6458e60
NTND
1065 const struct ofs_delta_entry *delta_a = a;
1066 const struct ofs_delta_entry *delta_b = b;
7218a215 1067
f0e7f11d
JK
1068 return delta_a->offset < delta_b->offset ? -1 :
1069 delta_a->offset > delta_b->offset ? 1 :
1070 0;
c6458e60
NTND
1071}
1072
1073static int compare_ref_delta_entry(const void *a, const void *b)
9cf6d335 1074{
c6458e60
NTND
1075 const struct ref_delta_entry *delta_a = a;
1076 const struct ref_delta_entry *delta_b = b;
7218a215 1077
af8caf33 1078 return oidcmp(&delta_a->oid, &delta_b->oid);
9cf6d335
SV
1079}
1080
5272f755
NTND
1081static void resolve_base(struct object_entry *obj)
1082{
1083 struct base_data *base_obj = alloc_base_data();
1084 base_obj->obj = obj;
1085 base_obj->data = NULL;
1086 find_unresolved_deltas(base_obj);
1087}
1088
b8a2486f
NTND
1089#ifndef NO_PTHREADS
1090static void *threaded_second_pass(void *data)
1091{
1092 set_thread_data(data);
1093 for (;;) {
1094 int i;
8f82aad4 1095 counter_lock();
b8a2486f 1096 display_progress(progress, nr_resolved_deltas);
8f82aad4
TR
1097 counter_unlock();
1098 work_lock();
b8a2486f
NTND
1099 while (nr_dispatched < nr_objects &&
1100 is_delta_type(objects[nr_dispatched].type))
1101 nr_dispatched++;
1102 if (nr_dispatched >= nr_objects) {
1103 work_unlock();
1104 break;
1105 }
1106 i = nr_dispatched++;
1107 work_unlock();
1108
1109 resolve_base(&objects[i]);
1110 }
1111 return NULL;
1112}
1113#endif
1114
5272f755
NTND
1115/*
1116 * First pass:
1117 * - find locations of all objects;
1118 * - calculate SHA1 of all non-delta objects;
1119 * - remember base (SHA1 or offset) for all deltas.
1120 */
454253f0 1121static void parse_pack_objects(unsigned char *hash)
9cf6d335 1122{
9ec2dde9 1123 int i, nr_delays = 0;
c6458e60 1124 struct ofs_delta_entry *ofs_delta = ofs_deltas;
454253f0 1125 struct object_id ref_delta_oid;
2d477051 1126 struct stat st;
9cf6d335 1127
13aaf148 1128 if (verbose)
29e63ed3 1129 progress = start_progress(
c2b97ecf 1130 from_stdin ? _("Receiving objects") : _("Indexing objects"),
29e63ed3 1131 nr_objects);
9cf6d335
SV
1132 for (i = 0; i < nr_objects; i++) {
1133 struct object_entry *obj = &objects[i];
c6458e60 1134 void *data = unpack_raw_entry(obj, &ofs_delta->offset,
454253f0 1135 &ref_delta_oid,
1136 &obj->idx.oid);
9cf6d335 1137 obj->real_type = obj->type;
c6458e60
NTND
1138 if (obj->type == OBJ_OFS_DELTA) {
1139 nr_ofs_deltas++;
1140 ofs_delta->obj_no = i;
1141 ofs_delta++;
1142 } else if (obj->type == OBJ_REF_DELTA) {
1143 ALLOC_GROW(ref_deltas, nr_ref_deltas + 1, ref_deltas_alloc);
af8caf33 1144 oidcpy(&ref_deltas[nr_ref_deltas].oid, &ref_delta_oid);
c6458e60
NTND
1145 ref_deltas[nr_ref_deltas].obj_no = i;
1146 nr_ref_deltas++;
9ec2dde9
NTND
1147 } else if (!data) {
1148 /* large blobs, check later */
1149 obj->real_type = OBJ_BAD;
1150 nr_delays++;
9cf6d335 1151 } else
e6a492b7 1152 sha1_object(data, NULL, obj->size, obj->type,
3e930981 1153 &obj->idx.oid);
9cf6d335 1154 free(data);
4d4fcc54 1155 display_progress(progress, i+1);
9cf6d335 1156 }
aa7e44bf 1157 objects[i].idx.offset = consumed_bytes;
4d4fcc54 1158 stop_progress(&progress);
2d477051
NP
1159
1160 /* Check pack integrity */
636171cb 1161 flush();
454253f0 1162 the_hash_algo->final_fn(hash, &input_ctx);
1163 if (hashcmp(fill(the_hash_algo->rawsz), hash))
c2b97ecf 1164 die(_("pack is corrupted (SHA1 mismatch)"));
454253f0 1165 use(the_hash_algo->rawsz);
2d477051
NP
1166
1167 /* If input_fd is a file, we should have reached its end now. */
1168 if (fstat(input_fd, &st))
c2b97ecf 1169 die_errno(_("cannot fstat packfile"));
fa257b05
JS
1170 if (S_ISREG(st.st_mode) &&
1171 lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size)
c2b97ecf 1172 die(_("pack has junk at the end"));
9ec2dde9
NTND
1173
1174 for (i = 0; i < nr_objects; i++) {
1175 struct object_entry *obj = &objects[i];
1176 if (obj->real_type != OBJ_BAD)
1177 continue;
1178 obj->real_type = obj->type;
e6a492b7 1179 sha1_object(NULL, obj, obj->size, obj->type,
3e930981 1180 &obj->idx.oid);
9ec2dde9
NTND
1181 nr_delays--;
1182 }
1183 if (nr_delays)
1184 die(_("confusion beyond insanity in parse_pack_objects()"));
5272f755
NTND
1185}
1186
1187/*
1188 * Second pass:
1189 * - for all non-delta objects, look if it is used as a base for
1190 * deltas;
1191 * - if used as a base, uncompress the object and apply all deltas,
1192 * recursively checking if the resulting object is used as a base
1193 * for some more deltas.
1194 */
1195static void resolve_deltas(void)
1196{
1197 int i;
9cf6d335 1198
c6458e60 1199 if (!nr_ofs_deltas && !nr_ref_deltas)
3c9af366
NP
1200 return;
1201
53dda6ff 1202 /* Sort deltas by base SHA1/offset for fast searching */
9ed0d8d6
RS
1203 QSORT(ofs_deltas, nr_ofs_deltas, compare_ofs_delta_entry);
1204 QSORT(ref_deltas, nr_ref_deltas, compare_ref_delta_entry);
9cf6d335 1205
e376f17f 1206 if (verbose || show_resolving_progress)
c6458e60
NTND
1207 progress = start_progress(_("Resolving deltas"),
1208 nr_ref_deltas + nr_ofs_deltas);
b8a2486f
NTND
1209
1210#ifndef NO_PTHREADS
1211 nr_dispatched = 0;
1212 if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) {
1213 init_thread();
1214 for (i = 0; i < nr_threads; i++) {
1215 int ret = pthread_create(&thread_data[i].thread, NULL,
1216 threaded_second_pass, thread_data + i);
1217 if (ret)
f350df42
NTND
1218 die(_("unable to create thread: %s"),
1219 strerror(ret));
b8a2486f
NTND
1220 }
1221 for (i = 0; i < nr_threads; i++)
1222 pthread_join(thread_data[i].thread, NULL);
1223 cleanup_thread();
1224 return;
1225 }
1226#endif
1227
9cf6d335
SV
1228 for (i = 0; i < nr_objects; i++) {
1229 struct object_entry *obj = &objects[i];
9cf6d335 1230
4f8ec74e 1231 if (is_delta_type(obj->type))
9cf6d335 1232 continue;
5272f755 1233 resolve_base(obj);
4d4fcc54 1234 display_progress(progress, nr_resolved_deltas);
9cf6d335 1235 }
636171cb
NP
1236}
1237
5272f755
NTND
1238/*
1239 * Third pass:
1240 * - append objects to convert thin pack to full pack if required
454253f0 1241 * - write the final pack hash
5272f755 1242 */
98a3beab 1243static void fix_unresolved_deltas(struct hashfile *f);
454253f0 1244static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_hash)
5272f755 1245{
c6458e60 1246 if (nr_ref_deltas + nr_ofs_deltas == nr_resolved_deltas) {
5272f755 1247 stop_progress(&progress);
454253f0 1248 /* Flush remaining pack final hash. */
5272f755
NTND
1249 flush();
1250 return;
1251 }
1252
1253 if (fix_thin_pack) {
98a3beab 1254 struct hashfile *f;
454253f0 1255 unsigned char read_hash[GIT_MAX_RAWSZ], tail_hash[GIT_MAX_RAWSZ];
5c3459fc 1256 struct strbuf msg = STRBUF_INIT;
c6458e60 1257 int nr_unresolved = nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas;
5272f755
NTND
1258 int nr_objects_initial = nr_objects;
1259 if (nr_unresolved <= 0)
cc13431a 1260 die(_("confusion beyond insanity"));
2756ca43 1261 REALLOC_ARRAY(objects, nr_objects + nr_unresolved + 1);
57165db0
JK
1262 memset(objects + nr_objects + 1, 0,
1263 nr_unresolved * sizeof(*objects));
98a3beab 1264 f = hashfd(output_fd, curr_pack);
781d9306 1265 fix_unresolved_deltas(f);
71d99b81
VA
1266 strbuf_addf(&msg, Q_("completed with %d local object",
1267 "completed with %d local objects",
1268 nr_objects - nr_objects_initial),
5c3459fc
NTND
1269 nr_objects - nr_objects_initial);
1270 stop_progress_msg(&progress, msg.buf);
1271 strbuf_release(&msg);
98a3beab 1272 hashclose(f, tail_hash, 0);
454253f0 1273 hashcpy(read_hash, pack_hash);
1274 fixup_pack_header_footer(output_fd, pack_hash,
5272f755 1275 curr_pack, nr_objects,
454253f0 1276 read_hash, consumed_bytes-the_hash_algo->rawsz);
1277 if (hashcmp(read_hash, tail_hash) != 0)
f350df42
NTND
1278 die(_("Unexpected tail checksum for %s "
1279 "(disk corruption?)"), curr_pack);
5272f755 1280 }
c6458e60 1281 if (nr_ofs_deltas + nr_ref_deltas != nr_resolved_deltas)
cc13431a
JH
1282 die(Q_("pack has %d unresolved delta",
1283 "pack has %d unresolved deltas",
c6458e60
NTND
1284 nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas),
1285 nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas);
5272f755
NTND
1286}
1287
98a3beab 1288static int write_compressed(struct hashfile *f, void *in, unsigned int size)
636171cb 1289{
ef49a7a0 1290 git_zstream stream;
7734d7f2
NP
1291 int status;
1292 unsigned char outbuf[4096];
636171cb 1293
55bb5c91 1294 git_deflate_init(&stream, zlib_compression_level);
636171cb
NP
1295 stream.next_in = in;
1296 stream.avail_in = size;
636171cb 1297
7734d7f2
NP
1298 do {
1299 stream.next_out = outbuf;
1300 stream.avail_out = sizeof(outbuf);
55bb5c91 1301 status = git_deflate(&stream, Z_FINISH);
98a3beab 1302 hashwrite(f, outbuf, sizeof(outbuf) - stream.avail_out);
7734d7f2
NP
1303 } while (status == Z_OK);
1304
1305 if (status != Z_STREAM_END)
c2b97ecf 1306 die(_("unable to deflate appended object (%d)"), status);
636171cb 1307 size = stream.total_out;
55bb5c91 1308 git_deflate_end(&stream);
636171cb
NP
1309 return size;
1310}
1311
98a3beab 1312static struct object_entry *append_obj_to_pack(struct hashfile *f,
03993e13 1313 const unsigned char *sha1, void *buf,
636171cb
NP
1314 unsigned long size, enum object_type type)
1315{
1316 struct object_entry *obj = &objects[nr_objects++];
1317 unsigned char header[10];
1318 unsigned long s = size;
1319 int n = 0;
1320 unsigned char c = (type << 4) | (s & 15);
1321 s >>= 4;
1322 while (s) {
1323 header[n++] = c | 0x80;
1324 c = s & 0x7f;
1325 s >>= 7;
1326 }
1327 header[n++] = c;
8522148f 1328 crc32_begin(f);
98a3beab 1329 hashwrite(f, header, n);
72de2883
BS
1330 obj[0].size = size;
1331 obj[0].hdr_size = n;
1332 obj[0].type = type;
1333 obj[0].real_type = type;
aa7e44bf 1334 obj[1].idx.offset = obj[0].idx.offset + n;
8522148f
NP
1335 obj[1].idx.offset += write_compressed(f, buf, size);
1336 obj[0].idx.crc32 = crc32_end(f);
98a3beab 1337 hashflush(f);
e6a492b7 1338 hashcpy(obj->idx.oid.hash, sha1);
03993e13 1339 return obj;
636171cb
NP
1340}
1341
1342static int delta_pos_compare(const void *_a, const void *_b)
1343{
c6458e60
NTND
1344 struct ref_delta_entry *a = *(struct ref_delta_entry **)_a;
1345 struct ref_delta_entry *b = *(struct ref_delta_entry **)_b;
636171cb
NP
1346 return a->obj_no - b->obj_no;
1347}
9cf6d335 1348
98a3beab 1349static void fix_unresolved_deltas(struct hashfile *f)
636171cb 1350{
c6458e60 1351 struct ref_delta_entry **sorted_by_pos;
781d9306 1352 int i;
636171cb
NP
1353
1354 /*
1355 * Since many unresolved deltas may well be themselves base objects
1356 * for more unresolved deltas, we really want to include the
1357 * smallest number of base objects that would cover as much delta
1358 * as possible by picking the
1359 * trunc deltas first, allowing for other deltas to resolve without
1360 * additional base objects. Since most base objects are to be found
1361 * before deltas depending on them, a good heuristic is to start
1362 * resolving deltas in the same order as their position in the pack.
1363 */
b32fa95f 1364 ALLOC_ARRAY(sorted_by_pos, nr_ref_deltas);
c6458e60 1365 for (i = 0; i < nr_ref_deltas; i++)
781d9306 1366 sorted_by_pos[i] = &ref_deltas[i];
9ed0d8d6 1367 QSORT(sorted_by_pos, nr_ref_deltas, delta_pos_compare);
636171cb 1368
781d9306 1369 for (i = 0; i < nr_ref_deltas; i++) {
c6458e60 1370 struct ref_delta_entry *d = sorted_by_pos[i];
21666f1a 1371 enum object_type type;
2baad220 1372 struct base_data *base_obj = alloc_base_data();
636171cb
NP
1373
1374 if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
1375 continue;
af8caf33 1376 base_obj->data = read_sha1_file(d->oid.hash, &type, &base_obj->size);
2baad220 1377 if (!base_obj->data)
636171cb 1378 continue;
636171cb 1379
17e65451 1380 if (check_object_signature(&d->oid, base_obj->data,
debca9d2 1381 base_obj->size, type_name(type)))
af8caf33 1382 die(_("local object %s is corrupt"), oid_to_hex(&d->oid));
1383 base_obj->obj = append_obj_to_pack(f, d->oid.hash,
2baad220
NTND
1384 base_obj->data, base_obj->size, type);
1385 find_unresolved_deltas(base_obj);
4d4fcc54 1386 display_progress(progress, nr_resolved_deltas);
636171cb
NP
1387 }
1388 free(sorted_by_pos);
1389}
1390
8e29c7c3
JT
1391static const char *derive_filename(const char *pack_name, const char *suffix,
1392 struct strbuf *buf)
1393{
1394 size_t len;
1395 if (!strip_suffix(pack_name, ".pack", &len))
1396 die(_("packfile name '%s' does not end with '.pack'"),
1397 pack_name);
1398 strbuf_add(buf, pack_name, len);
1399 strbuf_addch(buf, '.');
1400 strbuf_addstr(buf, suffix);
1401 return buf->buf;
1402}
1403
1404static void write_special_file(const char *suffix, const char *msg,
0fd90dab 1405 const char *pack_name, const unsigned char *hash,
8e29c7c3
JT
1406 const char **report)
1407{
1408 struct strbuf name_buf = STRBUF_INIT;
1409 const char *filename;
1410 int fd;
1411 int msg_len = strlen(msg);
1412
1413 if (pack_name)
1414 filename = derive_filename(pack_name, suffix, &name_buf);
1415 else
0fd90dab 1416 filename = odb_pack_name(&name_buf, hash, suffix);
8e29c7c3
JT
1417
1418 fd = odb_pack_keep(filename);
1419 if (fd < 0) {
1420 if (errno != EEXIST)
1421 die_errno(_("cannot write %s file '%s'"),
1422 suffix, filename);
1423 } else {
1424 if (msg_len > 0) {
1425 write_or_die(fd, msg, msg_len);
1426 write_or_die(fd, "\n", 1);
1427 }
1428 if (close(fd) != 0)
1429 die_errno(_("cannot close written %s file '%s'"),
1430 suffix, filename);
88e2f9ed
JT
1431 if (report)
1432 *report = suffix;
8e29c7c3
JT
1433 }
1434 strbuf_release(&name_buf);
1435}
1436
e42797f5
NP
1437static void final(const char *final_pack_name, const char *curr_pack_name,
1438 const char *final_index_name, const char *curr_index_name,
88e2f9ed 1439 const char *keep_msg, const char *promisor_msg,
454253f0 1440 unsigned char *hash)
e42797f5 1441{
3a55602e 1442 const char *report = "pack";
f2075480
JK
1443 struct strbuf pack_name = STRBUF_INIT;
1444 struct strbuf index_name = STRBUF_INIT;
e42797f5
NP
1445 int err;
1446
1447 if (!from_stdin) {
1448 close(input_fd);
1449 } else {
4c81b03e 1450 fsync_or_die(output_fd, curr_pack_name);
e42797f5
NP
1451 err = close(output_fd);
1452 if (err)
c2b97ecf 1453 die_errno(_("error while closing pack file"));
e42797f5
NP
1454 }
1455
8e29c7c3 1456 if (keep_msg)
0fd90dab 1457 write_special_file("keep", keep_msg, final_pack_name, hash,
8e29c7c3 1458 &report);
88e2f9ed
JT
1459 if (promisor_msg)
1460 write_special_file("promisor", promisor_msg, final_pack_name,
0fd90dab 1461 hash, NULL);
b8077709 1462
e42797f5 1463 if (final_pack_name != curr_pack_name) {
ba47a308 1464 if (!final_pack_name)
454253f0 1465 final_pack_name = odb_pack_name(&pack_name, hash, "pack");
cb5add58 1466 if (finalize_object_file(curr_pack_name, final_pack_name))
c2b97ecf 1467 die(_("cannot store pack file"));
fb8b1936 1468 } else if (from_stdin)
33b65030 1469 chmod(final_pack_name, 0444);
e42797f5 1470
e42797f5 1471 if (final_index_name != curr_index_name) {
ba47a308 1472 if (!final_index_name)
454253f0 1473 final_index_name = odb_pack_name(&index_name, hash, "idx");
cb5add58 1474 if (finalize_object_file(curr_index_name, final_index_name))
c2b97ecf 1475 die(_("cannot store index file"));
fb8b1936
JH
1476 } else
1477 chmod(final_index_name, 0444);
576162a4
NP
1478
1479 if (!from_stdin) {
454253f0 1480 printf("%s\n", sha1_to_hex(hash));
576162a4 1481 } else {
5b1ef2ce
JK
1482 struct strbuf buf = STRBUF_INIT;
1483
454253f0 1484 strbuf_addf(&buf, "%s\t%s\n", report, sha1_to_hex(hash));
5b1ef2ce
JK
1485 write_or_die(1, buf.buf, buf.len);
1486 strbuf_release(&buf);
576162a4
NP
1487
1488 /*
1489 * Let's just mimic git-unpack-objects here and write
1490 * the last part of the input buffer to stdout.
1491 */
1492 while (input_len) {
1493 err = xwrite(1, input_buffer + input_offset, input_len);
1494 if (err <= 0)
1495 break;
1496 input_len -= err;
1497 input_offset += err;
1498 }
1499 }
ba47a308 1500
f2075480
JK
1501 strbuf_release(&index_name);
1502 strbuf_release(&pack_name);
9cf6d335
SV
1503}
1504
ef90d6d4 1505static int git_index_pack_config(const char *k, const char *v, void *cb)
4d00bda2 1506{
ebcfb379
JH
1507 struct pack_idx_option *opts = cb;
1508
4d00bda2 1509 if (!strcmp(k, "pack.indexversion")) {
ebcfb379
JH
1510 opts->version = git_config_int(k, v);
1511 if (opts->version > 2)
f350df42 1512 die(_("bad pack.indexversion=%"PRIu32), opts->version);
4d00bda2
NP
1513 return 0;
1514 }
b8a2486f
NTND
1515 if (!strcmp(k, "pack.threads")) {
1516 nr_threads = git_config_int(k, v);
1517 if (nr_threads < 0)
f350df42 1518 die(_("invalid number of threads specified (%d)"),
b8a2486f
NTND
1519 nr_threads);
1520#ifdef NO_PTHREADS
1521 if (nr_threads != 1)
f350df42 1522 warning(_("no threads support, ignoring %s"), k);
b8a2486f
NTND
1523 nr_threads = 1;
1524#endif
1525 return 0;
1526 }
ef90d6d4 1527 return git_default_config(k, v, cb);
4d00bda2
NP
1528}
1529
3c9fc074
JH
1530static int cmp_uint32(const void *a_, const void *b_)
1531{
1532 uint32_t a = *((uint32_t *)a_);
1533 uint32_t b = *((uint32_t *)b_);
1534
1535 return (a < b) ? -1 : (a != b);
1536}
1537
1538static void read_v2_anomalous_offsets(struct packed_git *p,
1539 struct pack_idx_option *opts)
1540{
1541 const uint32_t *idx1, *idx2;
1542 uint32_t i;
1543
1544 /* The address of the 4-byte offset table */
1545 idx1 = (((const uint32_t *)p->index_data)
1546 + 2 /* 8-byte header */
1547 + 256 /* fan out */
1548 + 5 * p->num_objects /* 20-byte SHA-1 table */
1549 + p->num_objects /* CRC32 table */
1550 );
1551
1552 /* The address of the 8-byte offset table */
1553 idx2 = idx1 + p->num_objects;
1554
1555 for (i = 0; i < p->num_objects; i++) {
1556 uint32_t off = ntohl(idx1[i]);
1557 if (!(off & 0x80000000))
1558 continue;
1559 off = off & 0x7fffffff;
47fe3f6e 1560 check_pack_index_ptr(p, &idx2[off * 2]);
3c9fc074
JH
1561 if (idx2[off * 2])
1562 continue;
1563 /*
1564 * The real offset is ntohl(idx2[off * 2]) in high 4
1565 * octets, and ntohl(idx2[off * 2 + 1]) in low 4
1566 * octets. But idx2[off * 2] is Zero!!!
1567 */
1568 ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc);
1569 opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]);
1570 }
1571
1b5294de 1572 QSORT(opts->anomaly, opts->anomaly_nr, cmp_uint32);
3c9fc074
JH
1573}
1574
e337a04d
JH
1575static void read_idx_option(struct pack_idx_option *opts, const char *pack_name)
1576{
1577 struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1);
1578
1579 if (!p)
c2b97ecf 1580 die(_("Cannot open existing pack file '%s'"), pack_name);
e337a04d 1581 if (open_pack_index(p))
c2b97ecf 1582 die(_("Cannot open existing pack idx file for '%s'"), pack_name);
e337a04d
JH
1583
1584 /* Read the attributes from the existing idx file */
1585 opts->version = p->index_version;
1586
3c9fc074
JH
1587 if (opts->version == 2)
1588 read_v2_anomalous_offsets(p, opts);
1589
e337a04d
JH
1590 /*
1591 * Get rid of the idx file as we do not need it anymore.
1592 * NEEDSWORK: extract this bit from free_pack_by_name() in
1593 * sha1_file.c, perhaps? It shouldn't matter very much as we
1594 * know we haven't installed this pack (hence we never have
1595 * read anything from it).
1596 */
1597 close_pack_index(p);
1598 free(p);
1599}
1600
38a45561
JH
1601static void show_pack_info(int stat_only)
1602{
c6458e60 1603 int i, baseobjects = nr_objects - nr_ref_deltas - nr_ofs_deltas;
d1a0ed18
JH
1604 unsigned long *chain_histogram = NULL;
1605
1606 if (deepest_delta)
1607 chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long));
1608
38a45561
JH
1609 for (i = 0; i < nr_objects; i++) {
1610 struct object_entry *obj = &objects[i];
1611
d1a0ed18 1612 if (is_delta_type(obj->type))
41730576 1613 chain_histogram[obj_stat[i].delta_depth - 1]++;
38a45561
JH
1614 if (stat_only)
1615 continue;
1616 printf("%s %-6s %lu %lu %"PRIuMAX,
e6a492b7 1617 oid_to_hex(&obj->idx.oid),
debca9d2 1618 type_name(obj->real_type), obj->size,
38a45561
JH
1619 (unsigned long)(obj[1].idx.offset - obj->idx.offset),
1620 (uintmax_t)obj->idx.offset);
1621 if (is_delta_type(obj->type)) {
41730576 1622 struct object_entry *bobj = &objects[obj_stat[i].base_object_no];
e6a492b7 1623 printf(" %u %s", obj_stat[i].delta_depth,
1624 oid_to_hex(&bobj->idx.oid));
38a45561
JH
1625 }
1626 putchar('\n');
1627 }
d1a0ed18
JH
1628
1629 if (baseobjects)
c2b97ecf
NTND
1630 printf_ln(Q_("non delta: %d object",
1631 "non delta: %d objects",
1632 baseobjects),
1633 baseobjects);
d1a0ed18
JH
1634 for (i = 0; i < deepest_delta; i++) {
1635 if (!chain_histogram[i])
1636 continue;
c2b97ecf
NTND
1637 printf_ln(Q_("chain length = %d: %lu object",
1638 "chain length = %d: %lu objects",
1639 chain_histogram[i]),
1640 i + 1,
1641 chain_histogram[i]);
d1a0ed18 1642 }
38a45561
JH
1643}
1644
3bb72562 1645int cmd_index_pack(int argc, const char **argv, const char *prefix)
9cf6d335 1646{
3aba2fdd 1647 int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
39539495 1648 const char *curr_index;
3bb72562 1649 const char *index_name = NULL, *pack_name = NULL;
8e29c7c3 1650 const char *keep_msg = NULL;
88e2f9ed 1651 const char *promisor_msg = NULL;
8e29c7c3 1652 struct strbuf index_name_buf = STRBUF_INIT;
aa7e44bf 1653 struct pack_idx_entry **idx_objects;
ebcfb379 1654 struct pack_idx_option opts;
454253f0 1655 unsigned char pack_hash[GIT_MAX_RAWSZ];
c6807a40 1656 unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */
83558686 1657 int report_end_of_input = 0;
9cf6d335 1658
8b4c0103
JT
1659 /*
1660 * index-pack never needs to fetch missing objects, since it only
1661 * accesses the repo to do hash collision checks
1662 */
1663 fetch_if_missing = 0;
1664
99caeed0
JN
1665 if (argc == 2 && !strcmp(argv[1], "-h"))
1666 usage(index_pack_usage);
1667
afc711b8 1668 check_replace_refs = 0;
22410549 1669 fsck_options.walk = mark_link;
6e2a09d2 1670
ebcfb379
JH
1671 reset_pack_idx_option(&opts);
1672 git_config(git_index_pack_config, &opts);
3f8099fc 1673 if (prefix && chdir(prefix))
c2b97ecf 1674 die(_("Cannot come back to cwd"));
4d00bda2 1675
9cf6d335 1676 for (i = 1; i < argc; i++) {
3bb72562 1677 const char *arg = argv[i];
9cf6d335
SV
1678
1679 if (*arg == '-') {
e42797f5
NP
1680 if (!strcmp(arg, "--stdin")) {
1681 from_stdin = 1;
636171cb
NP
1682 } else if (!strcmp(arg, "--fix-thin")) {
1683 fix_thin_pack = 1;
72885a6d 1684 } else if (skip_to_optional_arg(arg, "--strict", &arg)) {
5d477a33
JS
1685 strict = 1;
1686 do_fsck_object = 1;
1687 fsck_set_msg_types(&fsck_options, arg);
c6807a40
NTND
1688 } else if (!strcmp(arg, "--check-self-contained-and-connected")) {
1689 strict = 1;
1690 check_self_contained_and_connected = 1;
e337a04d
JH
1691 } else if (!strcmp(arg, "--verify")) {
1692 verify = 1;
38a45561
JH
1693 } else if (!strcmp(arg, "--verify-stat")) {
1694 verify = 1;
3aba2fdd 1695 show_stat = 1;
38a45561
JH
1696 } else if (!strcmp(arg, "--verify-stat-only")) {
1697 verify = 1;
3aba2fdd 1698 show_stat = 1;
38a45561 1699 stat_only = 1;
72885a6d
CC
1700 } else if (skip_to_optional_arg(arg, "--keep", &keep_msg)) {
1701 ; /* nothing to do */
f3d618d2
JH
1702 } else if (skip_to_optional_arg(arg, "--promisor", &promisor_msg)) {
1703 ; /* already parsed */
59556548 1704 } else if (starts_with(arg, "--threads=")) {
b8a2486f
NTND
1705 char *end;
1706 nr_threads = strtoul(arg+10, &end, 0);
1707 if (!arg[10] || *end || nr_threads < 0)
1708 usage(index_pack_usage);
1709#ifdef NO_PTHREADS
1710 if (nr_threads != 1)
f350df42
NTND
1711 warning(_("no threads support, "
1712 "ignoring %s"), arg);
b8a2486f
NTND
1713 nr_threads = 1;
1714#endif
59556548 1715 } else if (starts_with(arg, "--pack_header=")) {
bed006fb
NP
1716 struct pack_header *hdr;
1717 char *c;
1718
1719 hdr = (struct pack_header *)input_buffer;
1720 hdr->hdr_signature = htonl(PACK_SIGNATURE);
1721 hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
1722 if (*c != ',')
c2b97ecf 1723 die(_("bad %s"), arg);
bed006fb
NP
1724 hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
1725 if (*c)
c2b97ecf 1726 die(_("bad %s"), arg);
bed006fb 1727 input_len = sizeof(*hdr);
3c9af366
NP
1728 } else if (!strcmp(arg, "-v")) {
1729 verbose = 1;
e376f17f
JK
1730 } else if (!strcmp(arg, "--show-resolving-progress")) {
1731 show_resolving_progress = 1;
83558686
JK
1732 } else if (!strcmp(arg, "--report-end-of-input")) {
1733 report_end_of_input = 1;
e42797f5 1734 } else if (!strcmp(arg, "-o")) {
9cf6d335
SV
1735 if (index_name || (i+1) >= argc)
1736 usage(index_pack_usage);
1737 index_name = argv[++i];
59556548 1738 } else if (starts_with(arg, "--index-version=")) {
4ba7d711 1739 char *c;
ebcfb379
JH
1740 opts.version = strtoul(arg + 16, &c, 10);
1741 if (opts.version > 2)
c2b97ecf 1742 die(_("bad %s"), arg);
4ba7d711 1743 if (*c == ',')
ebcfb379
JH
1744 opts.off32_limit = strtoul(c+1, &c, 0);
1745 if (*c || opts.off32_limit & 0x80000000)
c2b97ecf 1746 die(_("bad %s"), arg);
411481be
JK
1747 } else if (skip_prefix(arg, "--max-input-size=", &arg)) {
1748 max_input_size = strtoumax(arg, NULL, 10);
9cf6d335
SV
1749 } else
1750 usage(index_pack_usage);
1751 continue;
1752 }
1753
1754 if (pack_name)
1755 usage(index_pack_usage);
1756 pack_name = arg;
1757 }
1758
e42797f5 1759 if (!pack_name && !from_stdin)
9cf6d335 1760 usage(index_pack_usage);
636171cb 1761 if (fix_thin_pack && !from_stdin)
c2b97ecf 1762 die(_("--fix-thin cannot be used without --stdin"));
7176a314
JK
1763 if (from_stdin && !startup_info->have_repository)
1764 die(_("--stdin requires a git repository"));
bfee614a 1765 if (!index_name && pack_name)
8e29c7c3 1766 index_name = derive_filename(pack_name, "idx", &index_name_buf);
bfee614a 1767
e337a04d
JH
1768 if (verify) {
1769 if (!index_name)
c2b97ecf 1770 die(_("--verify with no packfile name given"));
e337a04d 1771 read_idx_option(&opts, index_name);
68be2fea 1772 opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT;
e337a04d 1773 }
68be2fea
JH
1774 if (strict)
1775 opts.flags |= WRITE_IDX_STRICT;
9cf6d335 1776
b8a2486f
NTND
1777#ifndef NO_PTHREADS
1778 if (!nr_threads) {
1779 nr_threads = online_cpus();
1780 /* An experiment showed that more threads does not mean faster */
1781 if (nr_threads > 3)
1782 nr_threads = 3;
1783 }
1784#endif
1785
e42797f5 1786 curr_pack = open_pack_file(pack_name);
9cf6d335 1787 parse_pack_header();
50a6c8ef 1788 objects = xcalloc(st_add(nr_objects, 1), sizeof(struct object_entry));
41730576 1789 if (show_stat)
50a6c8ef 1790 obj_stat = xcalloc(st_add(nr_objects, 1), sizeof(struct object_stat));
c6458e60 1791 ofs_deltas = xcalloc(nr_objects, sizeof(struct ofs_delta_entry));
454253f0 1792 parse_pack_objects(pack_hash);
83558686
JK
1793 if (report_end_of_input)
1794 write_in_full(2, "\0", 1);
5272f755 1795 resolve_deltas();
454253f0 1796 conclude_pack(fix_thin_pack, curr_pack, pack_hash);
c6458e60
NTND
1797 free(ofs_deltas);
1798 free(ref_deltas);
0153be05 1799 if (strict)
c6807a40 1800 foreign_nr = check_objects();
aa7e44bf 1801
3aba2fdd 1802 if (show_stat)
38a45561
JH
1803 show_pack_info(stat_only);
1804
b32fa95f 1805 ALLOC_ARRAY(idx_objects, nr_objects);
aa7e44bf
GB
1806 for (i = 0; i < nr_objects; i++)
1807 idx_objects[i] = &objects[i].idx;
454253f0 1808 curr_index = write_idx_file(index_name, idx_objects, nr_objects, &opts, pack_hash);
aa7e44bf
GB
1809 free(idx_objects);
1810
e337a04d
JH
1811 if (!verify)
1812 final(pack_name, curr_pack,
1813 index_name, curr_index,
88e2f9ed 1814 keep_msg, promisor_msg,
454253f0 1815 pack_hash);
e337a04d
JH
1816 else
1817 close(input_fd);
9cf6d335 1818 free(objects);
592ce208 1819 strbuf_release(&index_name_buf);
c85228ed 1820 if (pack_name == NULL)
3bb72562 1821 free((void *) curr_pack);
c85228ed 1822 if (index_name == NULL)
3bb72562 1823 free((void *) curr_index);
9cf6d335 1824
c6807a40
NTND
1825 /*
1826 * Let the caller know this pack is not self contained
1827 */
1828 if (check_self_contained_and_connected && foreign_nr)
1829 return 1;
1830
9cf6d335
SV
1831 return 0;
1832}