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[thirdparty/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"
d807c4a0 12#include "exec-cmd.h"
4614043c 13#include "streaming.h"
b8a2486f 14#include "thread-utils.h"
4f39cd82 15#include "packfile.h"
a80d72db 16#include "object-store.h"
9cf6d335
SV
17
18static const char index_pack_usage[] =
e337a04d 19"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
9cf6d335 20
9cba13ca 21struct object_entry {
aa7e44bf 22 struct pack_idx_entry idx;
2d477051 23 unsigned long size;
41730576
NTND
24 unsigned char hdr_size;
25 signed char type;
26 signed char real_type;
9cf6d335
SV
27};
28
41730576 29struct object_stat {
38a45561
JH
30 unsigned delta_depth;
31 int base_object_no;
53dda6ff
NP
32};
33
f41aebd4 34struct base_data {
4a438cab
SP
35 struct base_data *base;
36 struct base_data *child;
03993e13 37 struct object_entry *obj;
f41aebd4
SP
38 void *data;
39 unsigned long size;
2baad220
NTND
40 int ref_first, ref_last;
41 int ofs_first, ofs_last;
f41aebd4
SP
42};
43
b8a2486f
NTND
44struct thread_local {
45#ifndef NO_PTHREADS
46 pthread_t thread;
47#endif
48 struct base_data *base_cache;
49 size_t base_cache_used;
39539495 50 int pack_fd;
b8a2486f
NTND
51};
52
95308d64 53/* Remember to update object flag allocation in object.h */
0153be05
MK
54#define FLAG_LINK (1u<<20)
55#define FLAG_CHECKED (1u<<21)
56
c6458e60
NTND
57struct ofs_delta_entry {
58 off_t offset;
59 int obj_no;
60};
61
62struct ref_delta_entry {
af8caf33 63 struct object_id oid;
636171cb 64 int obj_no;
9cf6d335
SV
65};
66
9cf6d335 67static struct object_entry *objects;
41730576 68static struct object_stat *obj_stat;
c6458e60
NTND
69static struct ofs_delta_entry *ofs_deltas;
70static struct ref_delta_entry *ref_deltas;
b8a2486f 71static struct thread_local nothread_data;
9cf6d335 72static int nr_objects;
c6458e60
NTND
73static int nr_ofs_deltas;
74static int nr_ref_deltas;
75static int ref_deltas_alloc;
636171cb 76static int nr_resolved_deltas;
b8a2486f 77static int nr_threads;
9cf6d335 78
e42797f5 79static int from_stdin;
0153be05 80static int strict;
c6807a40 81static int do_fsck_object;
22410549 82static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
3c9af366 83static int verbose;
e376f17f 84static int show_resolving_progress;
3aba2fdd 85static int show_stat;
c6807a40 86static int check_self_contained_and_connected;
3c9af366 87
dc6a0757 88static struct progress *progress;
e42797f5 89
2d477051
NP
90/* We always read in 4kB chunks. */
91static unsigned char input_buffer[4096];
d7dd0223
NP
92static unsigned int input_offset, input_len;
93static off_t consumed_bytes;
411481be 94static off_t max_input_size;
d1a0ed18 95static unsigned deepest_delta;
454253f0 96static git_hash_ctx input_ctx;
ee5743ce 97static uint32_t input_crc32;
39539495
NTND
98static int input_fd, output_fd;
99static const char *curr_pack;
2d477051 100
b8a2486f
NTND
101#ifndef NO_PTHREADS
102
103static struct thread_local *thread_data;
104static int nr_dispatched;
105static int threads_active;
106
107static pthread_mutex_t read_mutex;
108#define read_lock() lock_mutex(&read_mutex)
109#define read_unlock() unlock_mutex(&read_mutex)
110
111static pthread_mutex_t counter_mutex;
112#define counter_lock() lock_mutex(&counter_mutex)
113#define counter_unlock() unlock_mutex(&counter_mutex)
114
115static pthread_mutex_t work_mutex;
116#define work_lock() lock_mutex(&work_mutex)
117#define work_unlock() unlock_mutex(&work_mutex)
118
3aba2fdd
NTND
119static pthread_mutex_t deepest_delta_mutex;
120#define deepest_delta_lock() lock_mutex(&deepest_delta_mutex)
121#define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex)
122
ab791dd1
JK
123static pthread_mutex_t type_cas_mutex;
124#define type_cas_lock() lock_mutex(&type_cas_mutex)
125#define type_cas_unlock() unlock_mutex(&type_cas_mutex)
126
b8a2486f
NTND
127static pthread_key_t key;
128
129static inline void lock_mutex(pthread_mutex_t *mutex)
130{
131 if (threads_active)
132 pthread_mutex_lock(mutex);
133}
134
135static inline void unlock_mutex(pthread_mutex_t *mutex)
136{
137 if (threads_active)
138 pthread_mutex_unlock(mutex);
139}
140
141/*
142 * Mutex and conditional variable can't be statically-initialized on Windows.
143 */
144static void init_thread(void)
145{
39539495 146 int i;
b8a2486f
NTND
147 init_recursive_mutex(&read_mutex);
148 pthread_mutex_init(&counter_mutex, NULL);
149 pthread_mutex_init(&work_mutex, NULL);
ab791dd1 150 pthread_mutex_init(&type_cas_mutex, NULL);
3aba2fdd
NTND
151 if (show_stat)
152 pthread_mutex_init(&deepest_delta_mutex, NULL);
b8a2486f
NTND
153 pthread_key_create(&key, NULL);
154 thread_data = xcalloc(nr_threads, sizeof(*thread_data));
39539495
NTND
155 for (i = 0; i < nr_threads; i++) {
156 thread_data[i].pack_fd = open(curr_pack, O_RDONLY);
157 if (thread_data[i].pack_fd == -1)
158 die_errno(_("unable to open %s"), curr_pack);
159 }
160
b8a2486f
NTND
161 threads_active = 1;
162}
163
164static void cleanup_thread(void)
165{
39539495 166 int i;
b8a2486f
NTND
167 if (!threads_active)
168 return;
169 threads_active = 0;
170 pthread_mutex_destroy(&read_mutex);
171 pthread_mutex_destroy(&counter_mutex);
172 pthread_mutex_destroy(&work_mutex);
ab791dd1 173 pthread_mutex_destroy(&type_cas_mutex);
3aba2fdd
NTND
174 if (show_stat)
175 pthread_mutex_destroy(&deepest_delta_mutex);
39539495
NTND
176 for (i = 0; i < nr_threads; i++)
177 close(thread_data[i].pack_fd);
b8a2486f
NTND
178 pthread_key_delete(key);
179 free(thread_data);
180}
181
182#else
183
184#define read_lock()
185#define read_unlock()
186
187#define counter_lock()
188#define counter_unlock()
189
190#define work_lock()
191#define work_unlock()
192
3aba2fdd
NTND
193#define deepest_delta_lock()
194#define deepest_delta_unlock()
195
e0e21283
EB
196#define type_cas_lock()
197#define type_cas_unlock()
198
b8a2486f
NTND
199#endif
200
201
22410549 202static int mark_link(struct object *obj, int type, void *data, struct fsck_options *options)
0153be05
MK
203{
204 if (!obj)
205 return -1;
206
207 if (type != OBJ_ANY && obj->type != type)
f2fd0760 208 die(_("object type mismatch at %s"), oid_to_hex(&obj->oid));
0153be05
MK
209
210 obj->flags |= FLAG_LINK;
211 return 0;
212}
213
214/* The content of each linked object must have been checked
215 or it must be already present in the object database */
c6807a40 216static unsigned check_object(struct object *obj)
0153be05
MK
217{
218 if (!obj)
c6807a40 219 return 0;
0153be05
MK
220
221 if (!(obj->flags & FLAG_LINK))
c6807a40 222 return 0;
0153be05
MK
223
224 if (!(obj->flags & FLAG_CHECKED)) {
225 unsigned long size;
abef9020 226 int type = oid_object_info(&obj->oid, &size);
77583e77
JK
227 if (type <= 0)
228 die(_("did not receive expected object %s"),
f2fd0760 229 oid_to_hex(&obj->oid));
77583e77
JK
230 if (type != obj->type)
231 die(_("object %s: expected type %s, found %s"),
f2fd0760 232 oid_to_hex(&obj->oid),
debca9d2 233 type_name(obj->type), type_name(type));
0153be05 234 obj->flags |= FLAG_CHECKED;
c6807a40 235 return 1;
0153be05 236 }
c6807a40
NTND
237
238 return 0;
0153be05
MK
239}
240
c6807a40 241static unsigned check_objects(void)
0153be05 242{
c6807a40 243 unsigned i, max, foreign_nr = 0;
0153be05
MK
244
245 max = get_max_object_index();
246 for (i = 0; i < max; i++)
c6807a40
NTND
247 foreign_nr += check_object(get_indexed_object(i));
248 return foreign_nr;
0153be05
MK
249}
250
251
636171cb 252/* Discard current buffer used content. */
a6e8a767 253static void flush(void)
636171cb
NP
254{
255 if (input_offset) {
256 if (output_fd >= 0)
257 write_or_die(output_fd, input_buffer, input_offset);
454253f0 258 the_hash_algo->update_fn(&input_ctx, input_buffer, input_offset);
554a2636 259 memmove(input_buffer, input_buffer + input_offset, input_len);
636171cb
NP
260 input_offset = 0;
261 }
262}
263
2d477051
NP
264/*
265 * Make sure at least "min" bytes are available in the buffer, and
266 * return the pointer to the buffer.
267 */
b89c4e93 268static void *fill(int min)
9cf6d335 269{
2d477051
NP
270 if (min <= input_len)
271 return input_buffer + input_offset;
272 if (min > sizeof(input_buffer))
c2b97ecf
NTND
273 die(Q_("cannot fill %d byte",
274 "cannot fill %d bytes",
275 min),
276 min);
636171cb 277 flush();
2d477051 278 do {
8a912bcb 279 ssize_t ret = xread(input_fd, input_buffer + input_len,
2d477051
NP
280 sizeof(input_buffer) - input_len);
281 if (ret <= 0) {
282 if (!ret)
c2b97ecf
NTND
283 die(_("early EOF"));
284 die_errno(_("read error on input"));
2d477051
NP
285 }
286 input_len += ret;
218558af
NP
287 if (from_stdin)
288 display_throughput(progress, consumed_bytes + input_len);
2d477051
NP
289 } while (input_len < min);
290 return input_buffer;
291}
292
293static void use(int bytes)
294{
295 if (bytes > input_len)
c2b97ecf 296 die(_("used more bytes than were available"));
ee5743ce 297 input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
2d477051
NP
298 input_len -= bytes;
299 input_offset += bytes;
d7dd0223
NP
300
301 /* make sure off_t is sufficiently large not to wrap */
c03c8315 302 if (signed_add_overflows(consumed_bytes, bytes))
c2b97ecf 303 die(_("pack too large for current definition of off_t"));
2d477051 304 consumed_bytes += bytes;
411481be
JK
305 if (max_input_size && consumed_bytes > max_input_size)
306 die(_("pack exceeds maximum allowed size"));
2d477051 307}
9cf6d335 308
3bb72562 309static const char *open_pack_file(const char *pack_name)
2d477051 310{
e42797f5
NP
311 if (from_stdin) {
312 input_fd = 0;
313 if (!pack_name) {
594fa999
JK
314 struct strbuf tmp_file = STRBUF_INIT;
315 output_fd = odb_mkstemp(&tmp_file,
6e180cdc 316 "pack/tmp_pack_XXXXXX");
594fa999 317 pack_name = strbuf_detach(&tmp_file, NULL);
892e723a 318 } else {
e42797f5 319 output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
892e723a
JK
320 if (output_fd < 0)
321 die_errno(_("unable to create '%s'"), pack_name);
322 }
39539495 323 nothread_data.pack_fd = output_fd;
e42797f5
NP
324 } else {
325 input_fd = open(pack_name, O_RDONLY);
326 if (input_fd < 0)
c2b97ecf 327 die_errno(_("cannot open packfile '%s'"), pack_name);
e42797f5 328 output_fd = -1;
39539495 329 nothread_data.pack_fd = input_fd;
e42797f5 330 }
454253f0 331 the_hash_algo->init_fn(&input_ctx);
e42797f5 332 return pack_name;
9cf6d335
SV
333}
334
335static void parse_pack_header(void)
336{
2d477051 337 struct pack_header *hdr = fill(sizeof(struct pack_header));
9cf6d335
SV
338
339 /* Header consistency check */
9cf6d335 340 if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
c2b97ecf 341 die(_("pack signature mismatch"));
d60fc1c8 342 if (!pack_version_ok(hdr->hdr_version))
f350df42 343 die(_("pack version %"PRIu32" unsupported"),
6e1c2344 344 ntohl(hdr->hdr_version));
9cf6d335
SV
345
346 nr_objects = ntohl(hdr->hdr_entries);
2d477051 347 use(sizeof(struct pack_header));
9cf6d335
SV
348}
349
fd3e6747 350static NORETURN void bad_object(off_t offset, const char *format,
a4f3131c 351 ...) __attribute__((format (printf, 2, 3)));
9cf6d335 352
fd3e6747 353static NORETURN void bad_object(off_t offset, const char *format, ...)
9cf6d335
SV
354{
355 va_list params;
356 char buf[1024];
357
358 va_start(params, format);
359 vsnprintf(buf, sizeof(buf), format, params);
360 va_end(params);
fd3e6747
NTND
361 die(_("pack has bad object at offset %"PRIuMAX": %s"),
362 (uintmax_t)offset, buf);
9cf6d335
SV
363}
364
b8a2486f
NTND
365static inline struct thread_local *get_thread_data(void)
366{
367#ifndef NO_PTHREADS
368 if (threads_active)
369 return pthread_getspecific(key);
370 assert(!threads_active &&
371 "This should only be reached when all threads are gone");
372#endif
373 return &nothread_data;
374}
375
376#ifndef NO_PTHREADS
377static void set_thread_data(struct thread_local *data)
378{
379 if (threads_active)
380 pthread_setspecific(key, data);
381}
382#endif
383
2baad220
NTND
384static struct base_data *alloc_base_data(void)
385{
51a60f5b 386 struct base_data *base = xcalloc(1, sizeof(struct base_data));
2baad220
NTND
387 base->ref_last = -1;
388 base->ofs_last = -1;
389 return base;
390}
391
6a87ed97
NP
392static void free_base_data(struct base_data *c)
393{
394 if (c->data) {
6a83d902 395 FREE_AND_NULL(c->data);
b8a2486f 396 get_thread_data()->base_cache_used -= c->size;
6a87ed97
NP
397 }
398}
399
92392b4a
SP
400static void prune_base_data(struct base_data *retain)
401{
8e24cbae 402 struct base_data *b;
b8a2486f
NTND
403 struct thread_local *data = get_thread_data();
404 for (b = data->base_cache;
405 data->base_cache_used > delta_base_cache_limit && b;
92392b4a 406 b = b->child) {
6a87ed97
NP
407 if (b->data && b != retain)
408 free_base_data(b);
92392b4a
SP
409 }
410}
411
4a438cab
SP
412static void link_base_data(struct base_data *base, struct base_data *c)
413{
414 if (base)
415 base->child = c;
416 else
b8a2486f 417 get_thread_data()->base_cache = c;
4a438cab
SP
418
419 c->base = base;
420 c->child = NULL;
9441b61d 421 if (c->data)
b8a2486f 422 get_thread_data()->base_cache_used += c->size;
92392b4a 423 prune_base_data(c);
4a438cab
SP
424}
425
426static void unlink_base_data(struct base_data *c)
427{
428 struct base_data *base = c->base;
429 if (base)
430 base->child = NULL;
431 else
b8a2486f 432 get_thread_data()->base_cache = NULL;
6a87ed97 433 free_base_data(c);
4a438cab
SP
434}
435
681b07de
NTND
436static int is_delta_type(enum object_type type)
437{
438 return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
439}
440
da49a7da 441static void *unpack_entry_data(off_t offset, unsigned long size,
454253f0 442 enum object_type type, struct object_id *oid)
9cf6d335 443{
9ec2dde9 444 static char fixed_buf[8192];
7ce4721a 445 int status;
ef49a7a0 446 git_zstream stream;
9ec2dde9 447 void *buf;
454253f0 448 git_hash_ctx c;
681b07de
NTND
449 char hdr[32];
450 int hdrlen;
451
452 if (!is_delta_type(type)) {
debca9d2 453 hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", type_name(type), size) + 1;
454253f0 454 the_hash_algo->init_fn(&c);
455 the_hash_algo->update_fn(&c, hdr, hdrlen);
681b07de 456 } else
454253f0 457 oid = NULL;
9ec2dde9
NTND
458 if (type == OBJ_BLOB && size > big_file_threshold)
459 buf = fixed_buf;
460 else
a1e920a0 461 buf = xmallocz(size);
9cf6d335
SV
462
463 memset(&stream, 0, sizeof(stream));
7ce4721a 464 git_inflate_init(&stream);
9cf6d335 465 stream.next_out = buf;
9ec2dde9 466 stream.avail_out = buf == fixed_buf ? sizeof(fixed_buf) : size;
9cf6d335 467
7ce4721a 468 do {
681b07de 469 unsigned char *last_out = stream.next_out;
2d477051
NP
470 stream.next_in = fill(1);
471 stream.avail_in = input_len;
7ce4721a
NP
472 status = git_inflate(&stream, 0);
473 use(input_len - stream.avail_in);
454253f0 474 if (oid)
475 the_hash_algo->update_fn(&c, last_out, stream.next_out - last_out);
9ec2dde9
NTND
476 if (buf == fixed_buf) {
477 stream.next_out = buf;
478 stream.avail_out = sizeof(fixed_buf);
479 }
7ce4721a
NP
480 } while (status == Z_OK);
481 if (stream.total_out != size || status != Z_STREAM_END)
c2b97ecf 482 bad_object(offset, _("inflate returned %d"), status);
39c68542 483 git_inflate_end(&stream);
454253f0 484 if (oid)
485 the_hash_algo->final_fn(oid->hash, &c);
9ec2dde9 486 return buf == fixed_buf ? NULL : buf;
9cf6d335
SV
487}
488
681b07de 489static void *unpack_raw_entry(struct object_entry *obj,
c6458e60 490 off_t *ofs_offset,
454253f0 491 struct object_id *ref_oid,
492 struct object_id *oid)
9cf6d335 493{
48fb7deb
LT
494 unsigned char *p;
495 unsigned long size, c;
d7dd0223 496 off_t base_offset;
9cf6d335 497 unsigned shift;
ee5743ce 498 void *data;
9cf6d335 499
aa7e44bf 500 obj->idx.offset = consumed_bytes;
1e4cd68c 501 input_crc32 = crc32(0, NULL, 0);
2d477051
NP
502
503 p = fill(1);
504 c = *p;
505 use(1);
506 obj->type = (c >> 4) & 7;
9cf6d335
SV
507 size = (c & 15);
508 shift = 4;
509 while (c & 0x80) {
2d477051
NP
510 p = fill(1);
511 c = *p;
512 use(1);
48fb7deb 513 size += (c & 0x7f) << shift;
9cf6d335
SV
514 shift += 7;
515 }
2d477051 516 obj->size = size;
9cf6d335 517
2d477051 518 switch (obj->type) {
eb32d236 519 case OBJ_REF_DELTA:
454253f0 520 hashcpy(ref_oid->hash, fill(the_hash_algo->rawsz));
521 use(the_hash_algo->rawsz);
53dda6ff
NP
522 break;
523 case OBJ_OFS_DELTA:
2d477051
NP
524 p = fill(1);
525 c = *p;
526 use(1);
53dda6ff
NP
527 base_offset = c & 127;
528 while (c & 128) {
529 base_offset += 1;
8723f216 530 if (!base_offset || MSB(base_offset, 7))
c2b97ecf 531 bad_object(obj->idx.offset, _("offset value overflow for delta base object"));
2d477051
NP
532 p = fill(1);
533 c = *p;
534 use(1);
53dda6ff
NP
535 base_offset = (base_offset << 7) + (c & 127);
536 }
c6458e60
NTND
537 *ofs_offset = obj->idx.offset - base_offset;
538 if (*ofs_offset <= 0 || *ofs_offset >= obj->idx.offset)
c2b97ecf 539 bad_object(obj->idx.offset, _("delta base offset is out of bound"));
53dda6ff 540 break;
9cf6d335
SV
541 case OBJ_COMMIT:
542 case OBJ_TREE:
543 case OBJ_BLOB:
544 case OBJ_TAG:
9cf6d335
SV
545 break;
546 default:
c2b97ecf 547 bad_object(obj->idx.offset, _("unknown object type %d"), obj->type);
9cf6d335 548 }
aa7e44bf 549 obj->hdr_size = consumed_bytes - obj->idx.offset;
2d477051 550
454253f0 551 data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, oid);
aa7e44bf 552 obj->idx.crc32 = input_crc32;
ee5743ce 553 return data;
2d477051
NP
554}
555
8a2e163c
NTND
556static void *unpack_data(struct object_entry *obj,
557 int (*consume)(const unsigned char *, unsigned long, void *),
558 void *cb_data)
2d477051 559{
a91ef6e7 560 off_t from = obj[0].idx.offset + obj[0].hdr_size;
7171a0b0 561 off_t len = obj[1].idx.offset - from;
776ea370 562 unsigned char *data, *inbuf;
ef49a7a0 563 git_zstream stream;
776ea370 564 int status;
9cf6d335 565
a1e920a0 566 data = xmallocz(consume ? 64*1024 : obj->size);
7171a0b0 567 inbuf = xmalloc((len < 64*1024) ? (int)len : 64*1024);
776ea370 568
2d477051 569 memset(&stream, 0, sizeof(stream));
776ea370 570 git_inflate_init(&stream);
2d477051 571 stream.next_out = data;
8a2e163c 572 stream.avail_out = consume ? 64*1024 : obj->size;
776ea370
NP
573
574 do {
7171a0b0 575 ssize_t n = (len < 64*1024) ? (ssize_t)len : 64*1024;
53f52cd9 576 n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
776ea370 577 if (n < 0)
c2b97ecf 578 die_errno(_("cannot pread pack file"));
776ea370 579 if (!n)
7171a0b0
NTND
580 die(Q_("premature end of pack file, %"PRIuMAX" byte missing",
581 "premature end of pack file, %"PRIuMAX" bytes missing",
582 (unsigned int)len),
583 (uintmax_t)len);
776ea370
NP
584 from += n;
585 len -= n;
586 stream.next_in = inbuf;
587 stream.avail_in = n;
f8b09038
JK
588 if (!consume)
589 status = git_inflate(&stream, 0);
590 else {
591 do {
592 status = git_inflate(&stream, 0);
593 if (consume(data, stream.next_out - data, cb_data)) {
594 free(inbuf);
595 free(data);
596 return NULL;
597 }
598 stream.next_out = data;
599 stream.avail_out = 64*1024;
600 } while (status == Z_OK && stream.avail_in);
8a2e163c 601 }
776ea370
NP
602 } while (len && status == Z_OK && !stream.avail_in);
603
604 /* This has been inflated OK when first encountered, so... */
605 if (status != Z_STREAM_END || stream.total_out != obj->size)
c2b97ecf 606 die(_("serious inflate inconsistency"));
776ea370
NP
607
608 git_inflate_end(&stream);
609 free(inbuf);
8a2e163c 610 if (consume) {
6a83d902 611 FREE_AND_NULL(data);
8a2e163c 612 }
9cf6d335
SV
613 return data;
614}
615
8a2e163c
NTND
616static void *get_data_from_pack(struct object_entry *obj)
617{
618 return unpack_data(obj, NULL, NULL);
619}
620
c6458e60
NTND
621static int compare_ofs_delta_bases(off_t offset1, off_t offset2,
622 enum object_type type1,
623 enum object_type type2)
7218a215
JH
624{
625 int cmp = type1 - type2;
626 if (cmp)
627 return cmp;
f0e7f11d
JK
628 return offset1 < offset2 ? -1 :
629 offset1 > offset2 ? 1 :
630 0;
7218a215
JH
631}
632
c6458e60 633static int find_ofs_delta(const off_t offset, enum object_type type)
9cf6d335 634{
c6458e60
NTND
635 int first = 0, last = nr_ofs_deltas;
636
637 while (first < last) {
19716b21 638 int next = first + (last - first) / 2;
c6458e60
NTND
639 struct ofs_delta_entry *delta = &ofs_deltas[next];
640 int cmp;
641
642 cmp = compare_ofs_delta_bases(offset, delta->offset,
643 type, objects[delta->obj_no].type);
644 if (!cmp)
645 return next;
646 if (cmp < 0) {
647 last = next;
648 continue;
649 }
650 first = next+1;
651 }
652 return -first-1;
9cf6d335
SV
653}
654
c6458e60
NTND
655static void find_ofs_delta_children(off_t offset,
656 int *first_index, int *last_index,
657 enum object_type type)
9cf6d335 658{
c6458e60 659 int first = find_ofs_delta(offset, type);
9cf6d335 660 int last = first;
c6458e60 661 int end = nr_ofs_deltas - 1;
9cf6d335 662
6a87ed97
NP
663 if (first < 0) {
664 *first_index = 0;
665 *last_index = -1;
666 return;
667 }
c6458e60 668 while (first > 0 && ofs_deltas[first - 1].offset == offset)
9cf6d335 669 --first;
c6458e60
NTND
670 while (last < end && ofs_deltas[last + 1].offset == offset)
671 ++last;
672 *first_index = first;
673 *last_index = last;
674}
675
af8caf33 676static int compare_ref_delta_bases(const struct object_id *oid1,
677 const struct object_id *oid2,
c6458e60
NTND
678 enum object_type type1,
679 enum object_type type2)
680{
681 int cmp = type1 - type2;
682 if (cmp)
683 return cmp;
af8caf33 684 return oidcmp(oid1, oid2);
c6458e60
NTND
685}
686
af8caf33 687static int find_ref_delta(const struct object_id *oid, enum object_type type)
c6458e60
NTND
688{
689 int first = 0, last = nr_ref_deltas;
690
691 while (first < last) {
19716b21 692 int next = first + (last - first) / 2;
c6458e60
NTND
693 struct ref_delta_entry *delta = &ref_deltas[next];
694 int cmp;
695
af8caf33 696 cmp = compare_ref_delta_bases(oid, &delta->oid,
c6458e60
NTND
697 type, objects[delta->obj_no].type);
698 if (!cmp)
699 return next;
700 if (cmp < 0) {
701 last = next;
702 continue;
703 }
704 first = next+1;
705 }
706 return -first-1;
707}
708
af8caf33 709static void find_ref_delta_children(const struct object_id *oid,
c6458e60
NTND
710 int *first_index, int *last_index,
711 enum object_type type)
712{
af8caf33 713 int first = find_ref_delta(oid, type);
c6458e60
NTND
714 int last = first;
715 int end = nr_ref_deltas - 1;
716
717 if (first < 0) {
718 *first_index = 0;
719 *last_index = -1;
720 return;
721 }
af8caf33 722 while (first > 0 && !oidcmp(&ref_deltas[first - 1].oid, oid))
c6458e60 723 --first;
af8caf33 724 while (last < end && !oidcmp(&ref_deltas[last + 1].oid, oid))
9cf6d335
SV
725 ++last;
726 *first_index = first;
727 *last_index = last;
9cf6d335
SV
728}
729
4614043c
NTND
730struct compare_data {
731 struct object_entry *entry;
732 struct git_istream *st;
733 unsigned char *buf;
734 unsigned long buf_size;
735};
736
737static int compare_objects(const unsigned char *buf, unsigned long size,
738 void *cb_data)
739{
740 struct compare_data *data = cb_data;
741
742 if (data->buf_size < size) {
743 free(data->buf);
744 data->buf = xmalloc(size);
745 data->buf_size = size;
746 }
747
748 while (size) {
749 ssize_t len = read_istream(data->st, data->buf, size);
750 if (len == 0)
751 die(_("SHA1 COLLISION FOUND WITH %s !"),
e6a492b7 752 oid_to_hex(&data->entry->idx.oid));
4614043c
NTND
753 if (len < 0)
754 die(_("unable to read %s"),
e6a492b7 755 oid_to_hex(&data->entry->idx.oid));
4614043c
NTND
756 if (memcmp(buf, data->buf, len))
757 die(_("SHA1 COLLISION FOUND WITH %s !"),
e6a492b7 758 oid_to_hex(&data->entry->idx.oid));
4614043c
NTND
759 size -= len;
760 buf += len;
761 }
762 return 0;
763}
764
765static int check_collison(struct object_entry *entry)
766{
767 struct compare_data data;
768 enum object_type type;
769 unsigned long size;
770
771 if (entry->size <= big_file_threshold || entry->type != OBJ_BLOB)
772 return -1;
773
774 memset(&data, 0, sizeof(data));
775 data.entry = entry;
ef7b5195 776 data.st = open_istream(&entry->idx.oid, &type, &size, NULL);
4614043c
NTND
777 if (!data.st)
778 return -1;
779 if (size != entry->size || type != entry->type)
780 die(_("SHA1 COLLISION FOUND WITH %s !"),
e6a492b7 781 oid_to_hex(&entry->idx.oid));
4614043c
NTND
782 unpack_data(entry, compare_objects, &data);
783 close_istream(data.st);
784 free(data.buf);
785 return 0;
786}
787
9ec2dde9
NTND
788static void sha1_object(const void *data, struct object_entry *obj_entry,
789 unsigned long size, enum object_type type,
3e930981 790 const struct object_id *oid)
9cf6d335 791{
9ec2dde9 792 void *new_data = NULL;
29401e15 793 int collision_test_needed = 0;
9ec2dde9
NTND
794
795 assert(data || obj_entry);
796
29401e15
JK
797 if (startup_info->have_repository) {
798 read_lock();
e83e71c5
JT
799 collision_test_needed =
800 has_sha1_file_with_flags(oid->hash, OBJECT_INFO_QUICK);
29401e15
JK
801 read_unlock();
802 }
4614043c
NTND
803
804 if (collision_test_needed && !data) {
805 read_lock();
806 if (!check_collison(obj_entry))
807 collision_test_needed = 0;
808 read_unlock();
809 }
810 if (collision_test_needed) {
8685da42
NP
811 void *has_data;
812 enum object_type has_type;
813 unsigned long has_size;
4614043c 814 read_lock();
abef9020 815 has_type = oid_object_info(oid, &has_size);
51054177 816 if (has_type < 0)
3e930981 817 die(_("cannot read existing object info %s"), oid_to_hex(oid));
4614043c 818 if (has_type != type || has_size != size)
3e930981 819 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid));
b4f5aca4 820 has_data = read_object_file(oid, &has_type, &has_size);
b8a2486f 821 read_unlock();
4614043c
NTND
822 if (!data)
823 data = new_data = get_data_from_pack(obj_entry);
8685da42 824 if (!has_data)
3e930981 825 die(_("cannot read existing object %s"), oid_to_hex(oid));
8685da42
NP
826 if (size != has_size || type != has_type ||
827 memcmp(data, has_data, size) != 0)
3e930981 828 die(_("SHA1 COLLISION FOUND WITH %s !"), oid_to_hex(oid));
bbf4b41b 829 free(has_data);
4614043c 830 }
b8a2486f 831
ffb2c0fe 832 if (strict || do_fsck_object) {
b8a2486f 833 read_lock();
0153be05 834 if (type == OBJ_BLOB) {
3aca1fc6 835 struct blob *blob = lookup_blob(oid);
0153be05
MK
836 if (blob)
837 blob->object.flags |= FLAG_CHECKED;
838 else
3e930981 839 die(_("invalid blob object %s"), oid_to_hex(oid));
0153be05
MK
840 } else {
841 struct object *obj;
842 int eaten;
843 void *buf = (void *) data;
844
920734b0 845 assert(data && "data can only be NULL for large _blobs_");
9ec2dde9 846
0153be05
MK
847 /*
848 * we do not need to free the memory here, as the
849 * buf is deleted by the caller.
850 */
c251c83d 851 obj = parse_object_buffer(oid, type, size, buf,
852 &eaten);
0153be05 853 if (!obj)
debca9d2 854 die(_("invalid %s"), type_name(type));
c6807a40 855 if (do_fsck_object &&
22410549 856 fsck_object(obj, buf, size, &fsck_options))
c2b97ecf 857 die(_("Error in object"));
ffb2c0fe 858 if (strict && fsck_walk(obj, NULL, &fsck_options))
f2fd0760 859 die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj->oid));
0153be05
MK
860
861 if (obj->type == OBJ_TREE) {
862 struct tree *item = (struct tree *) obj;
863 item->buffer = NULL;
6e454b9a 864 obj->parsed = 0;
0153be05
MK
865 }
866 if (obj->type == OBJ_COMMIT) {
867 struct commit *commit = (struct commit *) obj;
8597ea3a 868 if (detach_commit_buffer(commit, NULL) != data)
0fb370da 869 die("BUG: parse_object_buffer transmogrified our buffer");
0153be05
MK
870 }
871 obj->flags |= FLAG_CHECKED;
872 }
b8a2486f 873 read_unlock();
0153be05 874 }
9ec2dde9
NTND
875
876 free(new_data);
9cf6d335
SV
877}
878
20e95d0a
NTND
879/*
880 * This function is part of find_unresolved_deltas(). There are two
881 * walkers going in the opposite ways.
882 *
883 * The first one in find_unresolved_deltas() traverses down from
884 * parent node to children, deflating nodes along the way. However,
885 * memory for deflated nodes is limited by delta_base_cache_limit, so
886 * at some point parent node's deflated content may be freed.
887 *
888 * The second walker is this function, which goes from current node up
889 * to top parent if necessary to deflate the node. In normal
890 * situation, its parent node would be already deflated, so it just
891 * needs to apply delta.
892 *
893 * In the worst case scenario, parent node is no longer deflated because
894 * we're running out of delta_base_cache_limit; we need to re-deflate
895 * parents, possibly up to the top base.
896 *
897 * All deflated objects here are subject to be freed if we exceed
898 * delta_base_cache_limit, just like in find_unresolved_deltas(), we
899 * just need to make sure the last node is not freed.
900 */
92392b4a
SP
901static void *get_base_data(struct base_data *c)
902{
903 if (!c->data) {
904 struct object_entry *obj = c->obj;
20e95d0a
NTND
905 struct base_data **delta = NULL;
906 int delta_nr = 0, delta_alloc = 0;
92392b4a 907
20e95d0a
NTND
908 while (is_delta_type(c->obj->type) && !c->data) {
909 ALLOC_GROW(delta, delta_nr + 1, delta_alloc);
910 delta[delta_nr++] = c;
911 c = c->base;
912 }
913 if (!delta_nr) {
914 c->data = get_data_from_pack(obj);
915 c->size = obj->size;
b8a2486f 916 get_thread_data()->base_cache_used += c->size;
20e95d0a
NTND
917 prune_base_data(c);
918 }
919 for (; delta_nr > 0; delta_nr--) {
920 void *base, *raw;
921 c = delta[delta_nr - 1];
922 obj = c->obj;
923 base = get_base_data(c->base);
924 raw = get_data_from_pack(obj);
92392b4a
SP
925 c->data = patch_delta(
926 base, c->base->size,
927 raw, obj->size,
928 &c->size);
929 free(raw);
930 if (!c->data)
c2b97ecf 931 bad_object(obj->idx.offset, _("failed to apply delta"));
b8a2486f 932 get_thread_data()->base_cache_used += c->size;
20e95d0a 933 prune_base_data(c);
9441b61d 934 }
20e95d0a 935 free(delta);
92392b4a
SP
936 }
937 return c->data;
938}
939
f41aebd4 940static void resolve_delta(struct object_entry *delta_obj,
9441b61d 941 struct base_data *base, struct base_data *result)
9cf6d335 942{
ce3f6dc6 943 void *base_data, *delta_data;
9cf6d335 944
3aba2fdd 945 if (show_stat) {
41730576
NTND
946 int i = delta_obj - objects;
947 int j = base->obj - objects;
948 obj_stat[i].delta_depth = obj_stat[j].delta_depth + 1;
3aba2fdd 949 deepest_delta_lock();
41730576
NTND
950 if (deepest_delta < obj_stat[i].delta_depth)
951 deepest_delta = obj_stat[i].delta_depth;
3aba2fdd 952 deepest_delta_unlock();
41730576 953 obj_stat[i].base_object_no = j;
3aba2fdd 954 }
636171cb 955 delta_data = get_data_from_pack(delta_obj);
ce3f6dc6 956 base_data = get_base_data(base);
9441b61d 957 result->obj = delta_obj;
ce3f6dc6
NP
958 result->data = patch_delta(base_data, base->size,
959 delta_data, delta_obj->size, &result->size);
9cf6d335 960 free(delta_data);
9441b61d 961 if (!result->data)
c2b97ecf 962 bad_object(delta_obj->idx.offset, _("failed to apply delta"));
f070facc 963 hash_object_file(result->data, result->size,
169c9c01 964 type_name(delta_obj->real_type), &delta_obj->idx.oid);
9ec2dde9 965 sha1_object(result->data, NULL, result->size, delta_obj->real_type,
3e930981 966 &delta_obj->idx.oid);
b8a2486f 967 counter_lock();
636171cb 968 nr_resolved_deltas++;
b8a2486f 969 counter_unlock();
9441b61d
NP
970}
971
ab791dd1
JK
972/*
973 * Standard boolean compare-and-swap: atomically check whether "*type" is
974 * "want"; if so, swap in "set" and return true. Otherwise, leave it untouched
975 * and return false.
976 */
41730576 977static int compare_and_swap_type(signed char *type,
ab791dd1
JK
978 enum object_type want,
979 enum object_type set)
980{
981 enum object_type old;
982
983 type_cas_lock();
984 old = *type;
985 if (old == want)
986 *type = set;
987 type_cas_unlock();
988
989 return old == want;
990}
991
2baad220
NTND
992static struct base_data *find_unresolved_deltas_1(struct base_data *base,
993 struct base_data *prev_base)
9441b61d 994{
2baad220 995 if (base->ref_last == -1 && base->ofs_last == -1) {
af8caf33 996 find_ref_delta_children(&base->obj->idx.oid,
c6458e60
NTND
997 &base->ref_first, &base->ref_last,
998 OBJ_REF_DELTA);
9441b61d 999
c6458e60
NTND
1000 find_ofs_delta_children(base->obj->idx.offset,
1001 &base->ofs_first, &base->ofs_last,
1002 OBJ_OFS_DELTA);
4a438cab 1003
2baad220
NTND
1004 if (base->ref_last == -1 && base->ofs_last == -1) {
1005 free(base->data);
1006 return NULL;
1007 }
53dda6ff 1008
2baad220
NTND
1009 link_base_data(prev_base, base);
1010 }
4a438cab 1011
2baad220 1012 if (base->ref_first <= base->ref_last) {
c6458e60 1013 struct object_entry *child = objects + ref_deltas[base->ref_first].obj_no;
2baad220 1014 struct base_data *result = alloc_base_data();
7218a215 1015
ab791dd1
JK
1016 if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA,
1017 base->obj->real_type))
1018 die("BUG: child->real_type != OBJ_REF_DELTA");
1019
2baad220
NTND
1020 resolve_delta(child, base, result);
1021 if (base->ref_first == base->ref_last && base->ofs_last == -1)
7218a215 1022 free_base_data(base);
2baad220
NTND
1023
1024 base->ref_first++;
1025 return result;
53dda6ff
NP
1026 }
1027
2baad220 1028 if (base->ofs_first <= base->ofs_last) {
c6458e60 1029 struct object_entry *child = objects + ofs_deltas[base->ofs_first].obj_no;
2baad220 1030 struct base_data *result = alloc_base_data();
7218a215
JH
1031
1032 assert(child->real_type == OBJ_OFS_DELTA);
ab791dd1 1033 child->real_type = base->obj->real_type;
2baad220
NTND
1034 resolve_delta(child, base, result);
1035 if (base->ofs_first == base->ofs_last)
7218a215 1036 free_base_data(base);
2baad220
NTND
1037
1038 base->ofs_first++;
1039 return result;
9cf6d335 1040 }
53dda6ff 1041
9441b61d 1042 unlink_base_data(base);
2baad220
NTND
1043 return NULL;
1044}
1045
1046static void find_unresolved_deltas(struct base_data *base)
1047{
1048 struct base_data *new_base, *prev_base = NULL;
1049 for (;;) {
1050 new_base = find_unresolved_deltas_1(base, prev_base);
1051
1052 if (new_base) {
1053 prev_base = base;
1054 base = new_base;
1055 } else {
1056 free(base);
1057 base = prev_base;
1058 if (!base)
1059 return;
1060 prev_base = base->base;
1061 }
1062 }
9cf6d335
SV
1063}
1064
c6458e60 1065static int compare_ofs_delta_entry(const void *a, const void *b)
9cf6d335 1066{
c6458e60
NTND
1067 const struct ofs_delta_entry *delta_a = a;
1068 const struct ofs_delta_entry *delta_b = b;
7218a215 1069
f0e7f11d
JK
1070 return delta_a->offset < delta_b->offset ? -1 :
1071 delta_a->offset > delta_b->offset ? 1 :
1072 0;
c6458e60
NTND
1073}
1074
1075static int compare_ref_delta_entry(const void *a, const void *b)
9cf6d335 1076{
c6458e60
NTND
1077 const struct ref_delta_entry *delta_a = a;
1078 const struct ref_delta_entry *delta_b = b;
7218a215 1079
af8caf33 1080 return oidcmp(&delta_a->oid, &delta_b->oid);
9cf6d335
SV
1081}
1082
5272f755
NTND
1083static void resolve_base(struct object_entry *obj)
1084{
1085 struct base_data *base_obj = alloc_base_data();
1086 base_obj->obj = obj;
1087 base_obj->data = NULL;
1088 find_unresolved_deltas(base_obj);
1089}
1090
b8a2486f
NTND
1091#ifndef NO_PTHREADS
1092static void *threaded_second_pass(void *data)
1093{
1094 set_thread_data(data);
1095 for (;;) {
1096 int i;
8f82aad4 1097 counter_lock();
b8a2486f 1098 display_progress(progress, nr_resolved_deltas);
8f82aad4
TR
1099 counter_unlock();
1100 work_lock();
b8a2486f
NTND
1101 while (nr_dispatched < nr_objects &&
1102 is_delta_type(objects[nr_dispatched].type))
1103 nr_dispatched++;
1104 if (nr_dispatched >= nr_objects) {
1105 work_unlock();
1106 break;
1107 }
1108 i = nr_dispatched++;
1109 work_unlock();
1110
1111 resolve_base(&objects[i]);
1112 }
1113 return NULL;
1114}
1115#endif
1116
5272f755
NTND
1117/*
1118 * First pass:
1119 * - find locations of all objects;
1120 * - calculate SHA1 of all non-delta objects;
1121 * - remember base (SHA1 or offset) for all deltas.
1122 */
454253f0 1123static void parse_pack_objects(unsigned char *hash)
9cf6d335 1124{
9ec2dde9 1125 int i, nr_delays = 0;
c6458e60 1126 struct ofs_delta_entry *ofs_delta = ofs_deltas;
454253f0 1127 struct object_id ref_delta_oid;
2d477051 1128 struct stat st;
9cf6d335 1129
13aaf148 1130 if (verbose)
29e63ed3 1131 progress = start_progress(
c2b97ecf 1132 from_stdin ? _("Receiving objects") : _("Indexing objects"),
29e63ed3 1133 nr_objects);
9cf6d335
SV
1134 for (i = 0; i < nr_objects; i++) {
1135 struct object_entry *obj = &objects[i];
c6458e60 1136 void *data = unpack_raw_entry(obj, &ofs_delta->offset,
454253f0 1137 &ref_delta_oid,
1138 &obj->idx.oid);
9cf6d335 1139 obj->real_type = obj->type;
c6458e60
NTND
1140 if (obj->type == OBJ_OFS_DELTA) {
1141 nr_ofs_deltas++;
1142 ofs_delta->obj_no = i;
1143 ofs_delta++;
1144 } else if (obj->type == OBJ_REF_DELTA) {
1145 ALLOC_GROW(ref_deltas, nr_ref_deltas + 1, ref_deltas_alloc);
af8caf33 1146 oidcpy(&ref_deltas[nr_ref_deltas].oid, &ref_delta_oid);
c6458e60
NTND
1147 ref_deltas[nr_ref_deltas].obj_no = i;
1148 nr_ref_deltas++;
9ec2dde9
NTND
1149 } else if (!data) {
1150 /* large blobs, check later */
1151 obj->real_type = OBJ_BAD;
1152 nr_delays++;
9cf6d335 1153 } else
e6a492b7 1154 sha1_object(data, NULL, obj->size, obj->type,
3e930981 1155 &obj->idx.oid);
9cf6d335 1156 free(data);
4d4fcc54 1157 display_progress(progress, i+1);
9cf6d335 1158 }
aa7e44bf 1159 objects[i].idx.offset = consumed_bytes;
4d4fcc54 1160 stop_progress(&progress);
2d477051
NP
1161
1162 /* Check pack integrity */
636171cb 1163 flush();
454253f0 1164 the_hash_algo->final_fn(hash, &input_ctx);
1165 if (hashcmp(fill(the_hash_algo->rawsz), hash))
c2b97ecf 1166 die(_("pack is corrupted (SHA1 mismatch)"));
454253f0 1167 use(the_hash_algo->rawsz);
2d477051
NP
1168
1169 /* If input_fd is a file, we should have reached its end now. */
1170 if (fstat(input_fd, &st))
c2b97ecf 1171 die_errno(_("cannot fstat packfile"));
fa257b05
JS
1172 if (S_ISREG(st.st_mode) &&
1173 lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size)
c2b97ecf 1174 die(_("pack has junk at the end"));
9ec2dde9
NTND
1175
1176 for (i = 0; i < nr_objects; i++) {
1177 struct object_entry *obj = &objects[i];
1178 if (obj->real_type != OBJ_BAD)
1179 continue;
1180 obj->real_type = obj->type;
e6a492b7 1181 sha1_object(NULL, obj, obj->size, obj->type,
3e930981 1182 &obj->idx.oid);
9ec2dde9
NTND
1183 nr_delays--;
1184 }
1185 if (nr_delays)
1186 die(_("confusion beyond insanity in parse_pack_objects()"));
5272f755
NTND
1187}
1188
1189/*
1190 * Second pass:
1191 * - for all non-delta objects, look if it is used as a base for
1192 * deltas;
1193 * - if used as a base, uncompress the object and apply all deltas,
1194 * recursively checking if the resulting object is used as a base
1195 * for some more deltas.
1196 */
1197static void resolve_deltas(void)
1198{
1199 int i;
9cf6d335 1200
c6458e60 1201 if (!nr_ofs_deltas && !nr_ref_deltas)
3c9af366
NP
1202 return;
1203
53dda6ff 1204 /* Sort deltas by base SHA1/offset for fast searching */
9ed0d8d6
RS
1205 QSORT(ofs_deltas, nr_ofs_deltas, compare_ofs_delta_entry);
1206 QSORT(ref_deltas, nr_ref_deltas, compare_ref_delta_entry);
9cf6d335 1207
e376f17f 1208 if (verbose || show_resolving_progress)
c6458e60
NTND
1209 progress = start_progress(_("Resolving deltas"),
1210 nr_ref_deltas + nr_ofs_deltas);
b8a2486f
NTND
1211
1212#ifndef NO_PTHREADS
1213 nr_dispatched = 0;
1214 if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) {
1215 init_thread();
1216 for (i = 0; i < nr_threads; i++) {
1217 int ret = pthread_create(&thread_data[i].thread, NULL,
1218 threaded_second_pass, thread_data + i);
1219 if (ret)
f350df42
NTND
1220 die(_("unable to create thread: %s"),
1221 strerror(ret));
b8a2486f
NTND
1222 }
1223 for (i = 0; i < nr_threads; i++)
1224 pthread_join(thread_data[i].thread, NULL);
1225 cleanup_thread();
1226 return;
1227 }
1228#endif
1229
9cf6d335
SV
1230 for (i = 0; i < nr_objects; i++) {
1231 struct object_entry *obj = &objects[i];
9cf6d335 1232
4f8ec74e 1233 if (is_delta_type(obj->type))
9cf6d335 1234 continue;
5272f755 1235 resolve_base(obj);
4d4fcc54 1236 display_progress(progress, nr_resolved_deltas);
9cf6d335 1237 }
636171cb
NP
1238}
1239
5272f755
NTND
1240/*
1241 * Third pass:
1242 * - append objects to convert thin pack to full pack if required
454253f0 1243 * - write the final pack hash
5272f755 1244 */
98a3beab 1245static void fix_unresolved_deltas(struct hashfile *f);
454253f0 1246static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_hash)
5272f755 1247{
c6458e60 1248 if (nr_ref_deltas + nr_ofs_deltas == nr_resolved_deltas) {
5272f755 1249 stop_progress(&progress);
454253f0 1250 /* Flush remaining pack final hash. */
5272f755
NTND
1251 flush();
1252 return;
1253 }
1254
1255 if (fix_thin_pack) {
98a3beab 1256 struct hashfile *f;
454253f0 1257 unsigned char read_hash[GIT_MAX_RAWSZ], tail_hash[GIT_MAX_RAWSZ];
5c3459fc 1258 struct strbuf msg = STRBUF_INIT;
c6458e60 1259 int nr_unresolved = nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas;
5272f755
NTND
1260 int nr_objects_initial = nr_objects;
1261 if (nr_unresolved <= 0)
cc13431a 1262 die(_("confusion beyond insanity"));
2756ca43 1263 REALLOC_ARRAY(objects, nr_objects + nr_unresolved + 1);
57165db0
JK
1264 memset(objects + nr_objects + 1, 0,
1265 nr_unresolved * sizeof(*objects));
98a3beab 1266 f = hashfd(output_fd, curr_pack);
781d9306 1267 fix_unresolved_deltas(f);
71d99b81
VA
1268 strbuf_addf(&msg, Q_("completed with %d local object",
1269 "completed with %d local objects",
1270 nr_objects - nr_objects_initial),
5c3459fc
NTND
1271 nr_objects - nr_objects_initial);
1272 stop_progress_msg(&progress, msg.buf);
1273 strbuf_release(&msg);
98a3beab 1274 hashclose(f, tail_hash, 0);
454253f0 1275 hashcpy(read_hash, pack_hash);
1276 fixup_pack_header_footer(output_fd, pack_hash,
5272f755 1277 curr_pack, nr_objects,
454253f0 1278 read_hash, consumed_bytes-the_hash_algo->rawsz);
1279 if (hashcmp(read_hash, tail_hash) != 0)
f350df42
NTND
1280 die(_("Unexpected tail checksum for %s "
1281 "(disk corruption?)"), curr_pack);
5272f755 1282 }
c6458e60 1283 if (nr_ofs_deltas + nr_ref_deltas != nr_resolved_deltas)
cc13431a
JH
1284 die(Q_("pack has %d unresolved delta",
1285 "pack has %d unresolved deltas",
c6458e60
NTND
1286 nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas),
1287 nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas);
5272f755
NTND
1288}
1289
98a3beab 1290static int write_compressed(struct hashfile *f, void *in, unsigned int size)
636171cb 1291{
ef49a7a0 1292 git_zstream stream;
7734d7f2
NP
1293 int status;
1294 unsigned char outbuf[4096];
636171cb 1295
55bb5c91 1296 git_deflate_init(&stream, zlib_compression_level);
636171cb
NP
1297 stream.next_in = in;
1298 stream.avail_in = size;
636171cb 1299
7734d7f2
NP
1300 do {
1301 stream.next_out = outbuf;
1302 stream.avail_out = sizeof(outbuf);
55bb5c91 1303 status = git_deflate(&stream, Z_FINISH);
98a3beab 1304 hashwrite(f, outbuf, sizeof(outbuf) - stream.avail_out);
7734d7f2
NP
1305 } while (status == Z_OK);
1306
1307 if (status != Z_STREAM_END)
c2b97ecf 1308 die(_("unable to deflate appended object (%d)"), status);
636171cb 1309 size = stream.total_out;
55bb5c91 1310 git_deflate_end(&stream);
636171cb
NP
1311 return size;
1312}
1313
98a3beab 1314static struct object_entry *append_obj_to_pack(struct hashfile *f,
03993e13 1315 const unsigned char *sha1, void *buf,
636171cb
NP
1316 unsigned long size, enum object_type type)
1317{
1318 struct object_entry *obj = &objects[nr_objects++];
1319 unsigned char header[10];
1320 unsigned long s = size;
1321 int n = 0;
1322 unsigned char c = (type << 4) | (s & 15);
1323 s >>= 4;
1324 while (s) {
1325 header[n++] = c | 0x80;
1326 c = s & 0x7f;
1327 s >>= 7;
1328 }
1329 header[n++] = c;
8522148f 1330 crc32_begin(f);
98a3beab 1331 hashwrite(f, header, n);
72de2883
BS
1332 obj[0].size = size;
1333 obj[0].hdr_size = n;
1334 obj[0].type = type;
1335 obj[0].real_type = type;
aa7e44bf 1336 obj[1].idx.offset = obj[0].idx.offset + n;
8522148f
NP
1337 obj[1].idx.offset += write_compressed(f, buf, size);
1338 obj[0].idx.crc32 = crc32_end(f);
98a3beab 1339 hashflush(f);
e6a492b7 1340 hashcpy(obj->idx.oid.hash, sha1);
03993e13 1341 return obj;
636171cb
NP
1342}
1343
1344static int delta_pos_compare(const void *_a, const void *_b)
1345{
c6458e60
NTND
1346 struct ref_delta_entry *a = *(struct ref_delta_entry **)_a;
1347 struct ref_delta_entry *b = *(struct ref_delta_entry **)_b;
636171cb
NP
1348 return a->obj_no - b->obj_no;
1349}
9cf6d335 1350
98a3beab 1351static void fix_unresolved_deltas(struct hashfile *f)
636171cb 1352{
c6458e60 1353 struct ref_delta_entry **sorted_by_pos;
781d9306 1354 int i;
636171cb
NP
1355
1356 /*
1357 * Since many unresolved deltas may well be themselves base objects
1358 * for more unresolved deltas, we really want to include the
1359 * smallest number of base objects that would cover as much delta
1360 * as possible by picking the
1361 * trunc deltas first, allowing for other deltas to resolve without
1362 * additional base objects. Since most base objects are to be found
1363 * before deltas depending on them, a good heuristic is to start
1364 * resolving deltas in the same order as their position in the pack.
1365 */
b32fa95f 1366 ALLOC_ARRAY(sorted_by_pos, nr_ref_deltas);
c6458e60 1367 for (i = 0; i < nr_ref_deltas; i++)
781d9306 1368 sorted_by_pos[i] = &ref_deltas[i];
9ed0d8d6 1369 QSORT(sorted_by_pos, nr_ref_deltas, delta_pos_compare);
636171cb 1370
781d9306 1371 for (i = 0; i < nr_ref_deltas; i++) {
c6458e60 1372 struct ref_delta_entry *d = sorted_by_pos[i];
21666f1a 1373 enum object_type type;
2baad220 1374 struct base_data *base_obj = alloc_base_data();
636171cb
NP
1375
1376 if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
1377 continue;
b4f5aca4 1378 base_obj->data = read_object_file(&d->oid, &type,
1379 &base_obj->size);
2baad220 1380 if (!base_obj->data)
636171cb 1381 continue;
636171cb 1382
17e65451 1383 if (check_object_signature(&d->oid, base_obj->data,
debca9d2 1384 base_obj->size, type_name(type)))
af8caf33 1385 die(_("local object %s is corrupt"), oid_to_hex(&d->oid));
1386 base_obj->obj = append_obj_to_pack(f, d->oid.hash,
2baad220
NTND
1387 base_obj->data, base_obj->size, type);
1388 find_unresolved_deltas(base_obj);
4d4fcc54 1389 display_progress(progress, nr_resolved_deltas);
636171cb
NP
1390 }
1391 free(sorted_by_pos);
1392}
1393
8e29c7c3
JT
1394static const char *derive_filename(const char *pack_name, const char *suffix,
1395 struct strbuf *buf)
1396{
1397 size_t len;
1398 if (!strip_suffix(pack_name, ".pack", &len))
1399 die(_("packfile name '%s' does not end with '.pack'"),
1400 pack_name);
1401 strbuf_add(buf, pack_name, len);
1402 strbuf_addch(buf, '.');
1403 strbuf_addstr(buf, suffix);
1404 return buf->buf;
1405}
1406
1407static void write_special_file(const char *suffix, const char *msg,
0fd90dab 1408 const char *pack_name, const unsigned char *hash,
8e29c7c3
JT
1409 const char **report)
1410{
1411 struct strbuf name_buf = STRBUF_INIT;
1412 const char *filename;
1413 int fd;
1414 int msg_len = strlen(msg);
1415
1416 if (pack_name)
1417 filename = derive_filename(pack_name, suffix, &name_buf);
1418 else
0fd90dab 1419 filename = odb_pack_name(&name_buf, hash, suffix);
8e29c7c3
JT
1420
1421 fd = odb_pack_keep(filename);
1422 if (fd < 0) {
1423 if (errno != EEXIST)
1424 die_errno(_("cannot write %s file '%s'"),
1425 suffix, filename);
1426 } else {
1427 if (msg_len > 0) {
1428 write_or_die(fd, msg, msg_len);
1429 write_or_die(fd, "\n", 1);
1430 }
1431 if (close(fd) != 0)
1432 die_errno(_("cannot close written %s file '%s'"),
1433 suffix, filename);
88e2f9ed
JT
1434 if (report)
1435 *report = suffix;
8e29c7c3
JT
1436 }
1437 strbuf_release(&name_buf);
1438}
1439
e42797f5
NP
1440static void final(const char *final_pack_name, const char *curr_pack_name,
1441 const char *final_index_name, const char *curr_index_name,
88e2f9ed 1442 const char *keep_msg, const char *promisor_msg,
454253f0 1443 unsigned char *hash)
e42797f5 1444{
3a55602e 1445 const char *report = "pack";
f2075480
JK
1446 struct strbuf pack_name = STRBUF_INIT;
1447 struct strbuf index_name = STRBUF_INIT;
e42797f5
NP
1448 int err;
1449
1450 if (!from_stdin) {
1451 close(input_fd);
1452 } else {
4c81b03e 1453 fsync_or_die(output_fd, curr_pack_name);
e42797f5
NP
1454 err = close(output_fd);
1455 if (err)
c2b97ecf 1456 die_errno(_("error while closing pack file"));
e42797f5
NP
1457 }
1458
8e29c7c3 1459 if (keep_msg)
0fd90dab 1460 write_special_file("keep", keep_msg, final_pack_name, hash,
8e29c7c3 1461 &report);
88e2f9ed
JT
1462 if (promisor_msg)
1463 write_special_file("promisor", promisor_msg, final_pack_name,
0fd90dab 1464 hash, NULL);
b8077709 1465
e42797f5 1466 if (final_pack_name != curr_pack_name) {
ba47a308 1467 if (!final_pack_name)
454253f0 1468 final_pack_name = odb_pack_name(&pack_name, hash, "pack");
cb5add58 1469 if (finalize_object_file(curr_pack_name, final_pack_name))
c2b97ecf 1470 die(_("cannot store pack file"));
fb8b1936 1471 } else if (from_stdin)
33b65030 1472 chmod(final_pack_name, 0444);
e42797f5 1473
e42797f5 1474 if (final_index_name != curr_index_name) {
ba47a308 1475 if (!final_index_name)
454253f0 1476 final_index_name = odb_pack_name(&index_name, hash, "idx");
cb5add58 1477 if (finalize_object_file(curr_index_name, final_index_name))
c2b97ecf 1478 die(_("cannot store index file"));
fb8b1936
JH
1479 } else
1480 chmod(final_index_name, 0444);
576162a4
NP
1481
1482 if (!from_stdin) {
454253f0 1483 printf("%s\n", sha1_to_hex(hash));
576162a4 1484 } else {
5b1ef2ce
JK
1485 struct strbuf buf = STRBUF_INIT;
1486
454253f0 1487 strbuf_addf(&buf, "%s\t%s\n", report, sha1_to_hex(hash));
5b1ef2ce
JK
1488 write_or_die(1, buf.buf, buf.len);
1489 strbuf_release(&buf);
576162a4
NP
1490
1491 /*
1492 * Let's just mimic git-unpack-objects here and write
1493 * the last part of the input buffer to stdout.
1494 */
1495 while (input_len) {
1496 err = xwrite(1, input_buffer + input_offset, input_len);
1497 if (err <= 0)
1498 break;
1499 input_len -= err;
1500 input_offset += err;
1501 }
1502 }
ba47a308 1503
f2075480
JK
1504 strbuf_release(&index_name);
1505 strbuf_release(&pack_name);
9cf6d335
SV
1506}
1507
ef90d6d4 1508static int git_index_pack_config(const char *k, const char *v, void *cb)
4d00bda2 1509{
ebcfb379
JH
1510 struct pack_idx_option *opts = cb;
1511
4d00bda2 1512 if (!strcmp(k, "pack.indexversion")) {
ebcfb379
JH
1513 opts->version = git_config_int(k, v);
1514 if (opts->version > 2)
f350df42 1515 die(_("bad pack.indexversion=%"PRIu32), opts->version);
4d00bda2
NP
1516 return 0;
1517 }
b8a2486f
NTND
1518 if (!strcmp(k, "pack.threads")) {
1519 nr_threads = git_config_int(k, v);
1520 if (nr_threads < 0)
f350df42 1521 die(_("invalid number of threads specified (%d)"),
b8a2486f
NTND
1522 nr_threads);
1523#ifdef NO_PTHREADS
1524 if (nr_threads != 1)
f350df42 1525 warning(_("no threads support, ignoring %s"), k);
b8a2486f
NTND
1526 nr_threads = 1;
1527#endif
1528 return 0;
1529 }
ef90d6d4 1530 return git_default_config(k, v, cb);
4d00bda2
NP
1531}
1532
3c9fc074
JH
1533static int cmp_uint32(const void *a_, const void *b_)
1534{
1535 uint32_t a = *((uint32_t *)a_);
1536 uint32_t b = *((uint32_t *)b_);
1537
1538 return (a < b) ? -1 : (a != b);
1539}
1540
1541static void read_v2_anomalous_offsets(struct packed_git *p,
1542 struct pack_idx_option *opts)
1543{
1544 const uint32_t *idx1, *idx2;
1545 uint32_t i;
1546
1547 /* The address of the 4-byte offset table */
1548 idx1 = (((const uint32_t *)p->index_data)
1549 + 2 /* 8-byte header */
1550 + 256 /* fan out */
1551 + 5 * p->num_objects /* 20-byte SHA-1 table */
1552 + p->num_objects /* CRC32 table */
1553 );
1554
1555 /* The address of the 8-byte offset table */
1556 idx2 = idx1 + p->num_objects;
1557
1558 for (i = 0; i < p->num_objects; i++) {
1559 uint32_t off = ntohl(idx1[i]);
1560 if (!(off & 0x80000000))
1561 continue;
1562 off = off & 0x7fffffff;
47fe3f6e 1563 check_pack_index_ptr(p, &idx2[off * 2]);
3c9fc074
JH
1564 if (idx2[off * 2])
1565 continue;
1566 /*
1567 * The real offset is ntohl(idx2[off * 2]) in high 4
1568 * octets, and ntohl(idx2[off * 2 + 1]) in low 4
1569 * octets. But idx2[off * 2] is Zero!!!
1570 */
1571 ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc);
1572 opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]);
1573 }
1574
1b5294de 1575 QSORT(opts->anomaly, opts->anomaly_nr, cmp_uint32);
3c9fc074
JH
1576}
1577
e337a04d
JH
1578static void read_idx_option(struct pack_idx_option *opts, const char *pack_name)
1579{
1580 struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1);
1581
1582 if (!p)
c2b97ecf 1583 die(_("Cannot open existing pack file '%s'"), pack_name);
e337a04d 1584 if (open_pack_index(p))
c2b97ecf 1585 die(_("Cannot open existing pack idx file for '%s'"), pack_name);
e337a04d
JH
1586
1587 /* Read the attributes from the existing idx file */
1588 opts->version = p->index_version;
1589
3c9fc074
JH
1590 if (opts->version == 2)
1591 read_v2_anomalous_offsets(p, opts);
1592
e337a04d
JH
1593 /*
1594 * Get rid of the idx file as we do not need it anymore.
1595 * NEEDSWORK: extract this bit from free_pack_by_name() in
1596 * sha1_file.c, perhaps? It shouldn't matter very much as we
1597 * know we haven't installed this pack (hence we never have
1598 * read anything from it).
1599 */
1600 close_pack_index(p);
1601 free(p);
1602}
1603
38a45561
JH
1604static void show_pack_info(int stat_only)
1605{
c6458e60 1606 int i, baseobjects = nr_objects - nr_ref_deltas - nr_ofs_deltas;
d1a0ed18
JH
1607 unsigned long *chain_histogram = NULL;
1608
1609 if (deepest_delta)
1610 chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long));
1611
38a45561
JH
1612 for (i = 0; i < nr_objects; i++) {
1613 struct object_entry *obj = &objects[i];
1614
d1a0ed18 1615 if (is_delta_type(obj->type))
41730576 1616 chain_histogram[obj_stat[i].delta_depth - 1]++;
38a45561
JH
1617 if (stat_only)
1618 continue;
1619 printf("%s %-6s %lu %lu %"PRIuMAX,
e6a492b7 1620 oid_to_hex(&obj->idx.oid),
debca9d2 1621 type_name(obj->real_type), obj->size,
38a45561
JH
1622 (unsigned long)(obj[1].idx.offset - obj->idx.offset),
1623 (uintmax_t)obj->idx.offset);
1624 if (is_delta_type(obj->type)) {
41730576 1625 struct object_entry *bobj = &objects[obj_stat[i].base_object_no];
e6a492b7 1626 printf(" %u %s", obj_stat[i].delta_depth,
1627 oid_to_hex(&bobj->idx.oid));
38a45561
JH
1628 }
1629 putchar('\n');
1630 }
d1a0ed18
JH
1631
1632 if (baseobjects)
c2b97ecf
NTND
1633 printf_ln(Q_("non delta: %d object",
1634 "non delta: %d objects",
1635 baseobjects),
1636 baseobjects);
d1a0ed18
JH
1637 for (i = 0; i < deepest_delta; i++) {
1638 if (!chain_histogram[i])
1639 continue;
c2b97ecf
NTND
1640 printf_ln(Q_("chain length = %d: %lu object",
1641 "chain length = %d: %lu objects",
1642 chain_histogram[i]),
1643 i + 1,
1644 chain_histogram[i]);
d1a0ed18 1645 }
38a45561
JH
1646}
1647
3bb72562 1648int cmd_index_pack(int argc, const char **argv, const char *prefix)
9cf6d335 1649{
3aba2fdd 1650 int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
39539495 1651 const char *curr_index;
3bb72562 1652 const char *index_name = NULL, *pack_name = NULL;
8e29c7c3 1653 const char *keep_msg = NULL;
88e2f9ed 1654 const char *promisor_msg = NULL;
8e29c7c3 1655 struct strbuf index_name_buf = STRBUF_INIT;
aa7e44bf 1656 struct pack_idx_entry **idx_objects;
ebcfb379 1657 struct pack_idx_option opts;
454253f0 1658 unsigned char pack_hash[GIT_MAX_RAWSZ];
c6807a40 1659 unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */
83558686 1660 int report_end_of_input = 0;
9cf6d335 1661
8b4c0103
JT
1662 /*
1663 * index-pack never needs to fetch missing objects, since it only
1664 * accesses the repo to do hash collision checks
1665 */
1666 fetch_if_missing = 0;
1667
99caeed0
JN
1668 if (argc == 2 && !strcmp(argv[1], "-h"))
1669 usage(index_pack_usage);
1670
afc711b8 1671 check_replace_refs = 0;
22410549 1672 fsck_options.walk = mark_link;
6e2a09d2 1673
ebcfb379
JH
1674 reset_pack_idx_option(&opts);
1675 git_config(git_index_pack_config, &opts);
3f8099fc 1676 if (prefix && chdir(prefix))
c2b97ecf 1677 die(_("Cannot come back to cwd"));
4d00bda2 1678
9cf6d335 1679 for (i = 1; i < argc; i++) {
3bb72562 1680 const char *arg = argv[i];
9cf6d335
SV
1681
1682 if (*arg == '-') {
e42797f5
NP
1683 if (!strcmp(arg, "--stdin")) {
1684 from_stdin = 1;
636171cb
NP
1685 } else if (!strcmp(arg, "--fix-thin")) {
1686 fix_thin_pack = 1;
72885a6d 1687 } else if (skip_to_optional_arg(arg, "--strict", &arg)) {
5d477a33
JS
1688 strict = 1;
1689 do_fsck_object = 1;
1690 fsck_set_msg_types(&fsck_options, arg);
c6807a40
NTND
1691 } else if (!strcmp(arg, "--check-self-contained-and-connected")) {
1692 strict = 1;
1693 check_self_contained_and_connected = 1;
ffb2c0fe
JT
1694 } else if (!strcmp(arg, "--fsck-objects")) {
1695 do_fsck_object = 1;
e337a04d
JH
1696 } else if (!strcmp(arg, "--verify")) {
1697 verify = 1;
38a45561
JH
1698 } else if (!strcmp(arg, "--verify-stat")) {
1699 verify = 1;
3aba2fdd 1700 show_stat = 1;
38a45561
JH
1701 } else if (!strcmp(arg, "--verify-stat-only")) {
1702 verify = 1;
3aba2fdd 1703 show_stat = 1;
38a45561 1704 stat_only = 1;
72885a6d
CC
1705 } else if (skip_to_optional_arg(arg, "--keep", &keep_msg)) {
1706 ; /* nothing to do */
f3d618d2
JH
1707 } else if (skip_to_optional_arg(arg, "--promisor", &promisor_msg)) {
1708 ; /* already parsed */
59556548 1709 } else if (starts_with(arg, "--threads=")) {
b8a2486f
NTND
1710 char *end;
1711 nr_threads = strtoul(arg+10, &end, 0);
1712 if (!arg[10] || *end || nr_threads < 0)
1713 usage(index_pack_usage);
1714#ifdef NO_PTHREADS
1715 if (nr_threads != 1)
f350df42
NTND
1716 warning(_("no threads support, "
1717 "ignoring %s"), arg);
b8a2486f
NTND
1718 nr_threads = 1;
1719#endif
59556548 1720 } else if (starts_with(arg, "--pack_header=")) {
bed006fb
NP
1721 struct pack_header *hdr;
1722 char *c;
1723
1724 hdr = (struct pack_header *)input_buffer;
1725 hdr->hdr_signature = htonl(PACK_SIGNATURE);
1726 hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
1727 if (*c != ',')
c2b97ecf 1728 die(_("bad %s"), arg);
bed006fb
NP
1729 hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
1730 if (*c)
c2b97ecf 1731 die(_("bad %s"), arg);
bed006fb 1732 input_len = sizeof(*hdr);
3c9af366
NP
1733 } else if (!strcmp(arg, "-v")) {
1734 verbose = 1;
e376f17f
JK
1735 } else if (!strcmp(arg, "--show-resolving-progress")) {
1736 show_resolving_progress = 1;
83558686
JK
1737 } else if (!strcmp(arg, "--report-end-of-input")) {
1738 report_end_of_input = 1;
e42797f5 1739 } else if (!strcmp(arg, "-o")) {
9cf6d335
SV
1740 if (index_name || (i+1) >= argc)
1741 usage(index_pack_usage);
1742 index_name = argv[++i];
59556548 1743 } else if (starts_with(arg, "--index-version=")) {
4ba7d711 1744 char *c;
ebcfb379
JH
1745 opts.version = strtoul(arg + 16, &c, 10);
1746 if (opts.version > 2)
c2b97ecf 1747 die(_("bad %s"), arg);
4ba7d711 1748 if (*c == ',')
ebcfb379
JH
1749 opts.off32_limit = strtoul(c+1, &c, 0);
1750 if (*c || opts.off32_limit & 0x80000000)
c2b97ecf 1751 die(_("bad %s"), arg);
411481be
JK
1752 } else if (skip_prefix(arg, "--max-input-size=", &arg)) {
1753 max_input_size = strtoumax(arg, NULL, 10);
9cf6d335
SV
1754 } else
1755 usage(index_pack_usage);
1756 continue;
1757 }
1758
1759 if (pack_name)
1760 usage(index_pack_usage);
1761 pack_name = arg;
1762 }
1763
e42797f5 1764 if (!pack_name && !from_stdin)
9cf6d335 1765 usage(index_pack_usage);
636171cb 1766 if (fix_thin_pack && !from_stdin)
c2b97ecf 1767 die(_("--fix-thin cannot be used without --stdin"));
7176a314
JK
1768 if (from_stdin && !startup_info->have_repository)
1769 die(_("--stdin requires a git repository"));
bfee614a 1770 if (!index_name && pack_name)
8e29c7c3 1771 index_name = derive_filename(pack_name, "idx", &index_name_buf);
bfee614a 1772
e337a04d
JH
1773 if (verify) {
1774 if (!index_name)
c2b97ecf 1775 die(_("--verify with no packfile name given"));
e337a04d 1776 read_idx_option(&opts, index_name);
68be2fea 1777 opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT;
e337a04d 1778 }
68be2fea
JH
1779 if (strict)
1780 opts.flags |= WRITE_IDX_STRICT;
9cf6d335 1781
b8a2486f
NTND
1782#ifndef NO_PTHREADS
1783 if (!nr_threads) {
1784 nr_threads = online_cpus();
1785 /* An experiment showed that more threads does not mean faster */
1786 if (nr_threads > 3)
1787 nr_threads = 3;
1788 }
1789#endif
1790
e42797f5 1791 curr_pack = open_pack_file(pack_name);
9cf6d335 1792 parse_pack_header();
50a6c8ef 1793 objects = xcalloc(st_add(nr_objects, 1), sizeof(struct object_entry));
41730576 1794 if (show_stat)
50a6c8ef 1795 obj_stat = xcalloc(st_add(nr_objects, 1), sizeof(struct object_stat));
c6458e60 1796 ofs_deltas = xcalloc(nr_objects, sizeof(struct ofs_delta_entry));
454253f0 1797 parse_pack_objects(pack_hash);
83558686
JK
1798 if (report_end_of_input)
1799 write_in_full(2, "\0", 1);
5272f755 1800 resolve_deltas();
454253f0 1801 conclude_pack(fix_thin_pack, curr_pack, pack_hash);
c6458e60
NTND
1802 free(ofs_deltas);
1803 free(ref_deltas);
0153be05 1804 if (strict)
c6807a40 1805 foreign_nr = check_objects();
aa7e44bf 1806
3aba2fdd 1807 if (show_stat)
38a45561
JH
1808 show_pack_info(stat_only);
1809
b32fa95f 1810 ALLOC_ARRAY(idx_objects, nr_objects);
aa7e44bf
GB
1811 for (i = 0; i < nr_objects; i++)
1812 idx_objects[i] = &objects[i].idx;
454253f0 1813 curr_index = write_idx_file(index_name, idx_objects, nr_objects, &opts, pack_hash);
aa7e44bf
GB
1814 free(idx_objects);
1815
e337a04d
JH
1816 if (!verify)
1817 final(pack_name, curr_pack,
1818 index_name, curr_index,
88e2f9ed 1819 keep_msg, promisor_msg,
454253f0 1820 pack_hash);
e337a04d
JH
1821 else
1822 close(input_fd);
9cf6d335 1823 free(objects);
592ce208 1824 strbuf_release(&index_name_buf);
c85228ed 1825 if (pack_name == NULL)
3bb72562 1826 free((void *) curr_pack);
c85228ed 1827 if (index_name == NULL)
3bb72562 1828 free((void *) curr_index);
9cf6d335 1829
c6807a40
NTND
1830 /*
1831 * Let the caller know this pack is not self contained
1832 */
1833 if (check_self_contained_and_connected && foreign_nr)
1834 return 1;
1835
9cf6d335
SV
1836 return 0;
1837}