1#include "cache.h"
2#include "delta.h"
3#include "pack.h"
4#include "csum-file.h"
5#include "blob.h"
6#include "commit.h"
7#include "tag.h"
8#include "tree.h"
9#include "progress.h"
10#include "fsck.h"
11static const char index_pack_usage[] =
13"git-index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
14struct object_entry
16{
17 struct pack_idx_entry idx;
18 unsigned long size;
19 unsigned int hdr_size;
20 enum object_type type;
21 enum object_type real_type;
22};
23union delta_base {
25 unsigned char sha1[20];
26 off_t offset;
27};
28struct base_data {
30 struct base_data *base;
31 struct base_data *child;
32 void *data;
33 unsigned long size;
34};
35/*
37 * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want
38 * to memcmp() only the first 20 bytes.
39 */
40#define UNION_BASE_SZ 20
41#define FLAG_LINK (1u<<20)
43#define FLAG_CHECKED (1u<<21)
44struct delta_entry
46{
47 union delta_base base;
48 int obj_no;
49};
50static struct object_entry *objects;
52static struct delta_entry *deltas;
53static struct base_data *base_cache;
54static int nr_objects;
55static int nr_deltas;
56static int nr_resolved_deltas;
57static int from_stdin;
59static int strict;
60static int verbose;
61static struct progress *progress;
63/* We always read in 4kB chunks. */
65static unsigned char input_buffer[4096];
66static unsigned int input_offset, input_len;
67static off_t consumed_bytes;
68static SHA_CTX input_ctx;
69static uint32_t input_crc32;
70static int input_fd, output_fd, pack_fd;
71static int mark_link(struct object *obj, int type, void *data)
73{
74 if (!obj)
75 return -1;
76 if (type != OBJ_ANY && obj->type != type)
78 die("object type mismatch at %s", sha1_to_hex(obj->sha1));
79 obj->flags |= FLAG_LINK;
81 return 0;
82}
83/* The content of each linked object must have been checked
85 or it must be already present in the object database */
86static void check_object(struct object *obj)
87{
88 if (!obj)
89 return;
90 if (!(obj->flags & FLAG_LINK))
92 return;
93 if (!(obj->flags & FLAG_CHECKED)) {
95 unsigned long size;
96 int type = sha1_object_info(obj->sha1, &size);
97 if (type != obj->type || type <= 0)
98 die("object of unexpected type");
99 obj->flags |= FLAG_CHECKED;
100 return;
101 }
102}
103static void check_objects(void)
105{
106 unsigned i, max;
107 max = get_max_object_index();
109 for (i = 0; i < max; i++)
110 check_object(get_indexed_object(i));
111}
112/* Discard current buffer used content. */
115static void flush(void)
116{
117 if (input_offset) {
118 if (output_fd >= 0)
119 write_or_die(output_fd, input_buffer, input_offset);
120 SHA1_Update(&input_ctx, input_buffer, input_offset);
121 memmove(input_buffer, input_buffer + input_offset, input_len);
122 input_offset = 0;
123 }
124}
125/*
127 * Make sure at least "min" bytes are available in the buffer, and
128 * return the pointer to the buffer.
129 */
130static void *fill(int min)
131{
132 if (min <= input_len)
133 return input_buffer + input_offset;
134 if (min > sizeof(input_buffer))
135 die("cannot fill %d bytes", min);
136 flush();
137 do {
138 ssize_t ret = xread(input_fd, input_buffer + input_len,
139 sizeof(input_buffer) - input_len);
140 if (ret <= 0) {
141 if (!ret)
142 die("early EOF");
143 die("read error on input: %s", strerror(errno));
144 }
145 input_len += ret;
146 if (from_stdin)
147 display_throughput(progress, consumed_bytes + input_len);
148 } while (input_len < min);
149 return input_buffer;
150}
151static void use(int bytes)
153{
154 if (bytes > input_len)
155 die("used more bytes than were available");
156 input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
157 input_len -= bytes;
158 input_offset += bytes;
159 /* make sure off_t is sufficiently large not to wrap */
161 if (consumed_bytes > consumed_bytes + bytes)
162 die("pack too large for current definition of off_t");
163 consumed_bytes += bytes;
164}
165static char *open_pack_file(char *pack_name)
167{
168 if (from_stdin) {
169 input_fd = 0;
170 if (!pack_name) {
171 static char tmpfile[PATH_MAX];
172 snprintf(tmpfile, sizeof(tmpfile),
173 "%s/tmp_pack_XXXXXX", get_object_directory());
174 output_fd = xmkstemp(tmpfile);
175 pack_name = xstrdup(tmpfile);
176 } else
177 output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
178 if (output_fd < 0)
179 die("unable to create %s: %s\n", pack_name, strerror(errno));
180 pack_fd = output_fd;
181 } else {
182 input_fd = open(pack_name, O_RDONLY);
183 if (input_fd < 0)
184 die("cannot open packfile '%s': %s",
185 pack_name, strerror(errno));
186 output_fd = -1;
187 pack_fd = input_fd;
188 }
189 SHA1_Init(&input_ctx);
190 return pack_name;
191}
192static void parse_pack_header(void)
194{
195 struct pack_header *hdr = fill(sizeof(struct pack_header));
196 /* Header consistency check */
198 if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
199 die("pack signature mismatch");
200 if (!pack_version_ok(hdr->hdr_version))
201 die("pack version %d unsupported", ntohl(hdr->hdr_version));
202 nr_objects = ntohl(hdr->hdr_entries);
204 use(sizeof(struct pack_header));
205}
206static void bad_object(unsigned long offset, const char *format,
208 ...) NORETURN __attribute__((format (printf, 2, 3)));
209static void bad_object(unsigned long offset, const char *format, ...)
211{
212 va_list params;
213 char buf[1024];
214 va_start(params, format);
216 vsnprintf(buf, sizeof(buf), format, params);
217 va_end(params);
218 die("pack has bad object at offset %lu: %s", offset, buf);
219}
220static void link_base_data(struct base_data *base, struct base_data *c)
222{
223 if (base)
224 base->child = c;
225 else
226 base_cache = c;
227 c->base = base;
229 c->child = NULL;
230}
231static void unlink_base_data(struct base_data *c)
233{
234 struct base_data *base = c->base;
235 if (base)
236 base->child = NULL;
237 else
238 base_cache = NULL;
239 free(c->data);
240}
241static void *unpack_entry_data(unsigned long offset, unsigned long size)
243{
244 z_stream stream;
245 void *buf = xmalloc(size);
246 memset(&stream, 0, sizeof(stream));
248 stream.next_out = buf;
249 stream.avail_out = size;
250 stream.next_in = fill(1);
251 stream.avail_in = input_len;
252 inflateInit(&stream);
253 for (;;) {
255 int ret = inflate(&stream, 0);
256 use(input_len - stream.avail_in);
257 if (stream.total_out == size && ret == Z_STREAM_END)
258 break;
259 if (ret != Z_OK)
260 bad_object(offset, "inflate returned %d", ret);
261 stream.next_in = fill(1);
262 stream.avail_in = input_len;
263 }
264 inflateEnd(&stream);
265 return buf;
266}
267static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base)
269{
270 unsigned char *p, c;
271 unsigned long size;
272 off_t base_offset;
273 unsigned shift;
274 void *data;
275 obj->idx.offset = consumed_bytes;
277 input_crc32 = crc32(0, Z_NULL, 0);
278 p = fill(1);
280 c = *p;
281 use(1);
282 obj->type = (c >> 4) & 7;
283 size = (c & 15);
284 shift = 4;
285 while (c & 0x80) {
286 p = fill(1);
287 c = *p;
288 use(1);
289 size += (c & 0x7fUL) << shift;
290 shift += 7;
291 }
292 obj->size = size;
293 switch (obj->type) {
295 case OBJ_REF_DELTA:
296 hashcpy(delta_base->sha1, fill(20));
297 use(20);
298 break;
299 case OBJ_OFS_DELTA:
300 memset(delta_base, 0, sizeof(*delta_base));
301 p = fill(1);
302 c = *p;
303 use(1);
304 base_offset = c & 127;
305 while (c & 128) {
306 base_offset += 1;
307 if (!base_offset || MSB(base_offset, 7))
308 bad_object(obj->idx.offset, "offset value overflow for delta base object");
309 p = fill(1);
310 c = *p;
311 use(1);
312 base_offset = (base_offset << 7) + (c & 127);
313 }
314 delta_base->offset = obj->idx.offset - base_offset;
315 if (delta_base->offset >= obj->idx.offset)
316 bad_object(obj->idx.offset, "delta base offset is out of bound");
317 break;
318 case OBJ_COMMIT:
319 case OBJ_TREE:
320 case OBJ_BLOB:
321 case OBJ_TAG:
322 break;
323 default:
324 bad_object(obj->idx.offset, "unknown object type %d", obj->type);
325 }
326 obj->hdr_size = consumed_bytes - obj->idx.offset;
327 data = unpack_entry_data(obj->idx.offset, obj->size);
329 obj->idx.crc32 = input_crc32;
330 return data;
331}
332static void *get_data_from_pack(struct object_entry *obj)
334{
335 off_t from = obj[0].idx.offset + obj[0].hdr_size;
336 unsigned long len = obj[1].idx.offset - from;
337 unsigned long rdy = 0;
338 unsigned char *src, *data;
339 z_stream stream;
340 int st;
341 src = xmalloc(len);
343 data = src;
344 do {
345 ssize_t n = pread(pack_fd, data + rdy, len - rdy, from + rdy);
346 if (n <= 0)
347 die("cannot pread pack file: %s", strerror(errno));
348 rdy += n;
349 } while (rdy < len);
350 data = xmalloc(obj->size);
351 memset(&stream, 0, sizeof(stream));
352 stream.next_out = data;
353 stream.avail_out = obj->size;
354 stream.next_in = src;
355 stream.avail_in = len;
356 inflateInit(&stream);
357 while ((st = inflate(&stream, Z_FINISH)) == Z_OK);
358 inflateEnd(&stream);
359 if (st != Z_STREAM_END || stream.total_out != obj->size)
360 die("serious inflate inconsistency");
361 free(src);
362 return data;
363}
364static int find_delta(const union delta_base *base)
366{
367 int first = 0, last = nr_deltas;
368 while (first < last) {
370 int next = (first + last) / 2;
371 struct delta_entry *delta = &deltas[next];
372 int cmp;
373 cmp = memcmp(base, &delta->base, UNION_BASE_SZ);
375 if (!cmp)
376 return next;
377 if (cmp < 0) {
378 last = next;
379 continue;
380 }
381 first = next+1;
382 }
383 return -first-1;
384}
385static int find_delta_children(const union delta_base *base,
387 int *first_index, int *last_index)
388{
389 int first = find_delta(base);
390 int last = first;
391 int end = nr_deltas - 1;
392 if (first < 0)
394 return -1;
395 while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ))
396 --first;
397 while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ))
398 ++last;
399 *first_index = first;
400 *last_index = last;
401 return 0;
402}
403static void sha1_object(const void *data, unsigned long size,
405 enum object_type type, unsigned char *sha1)
406{
407 hash_sha1_file(data, size, typename(type), sha1);
408 if (has_sha1_file(sha1)) {
409 void *has_data;
410 enum object_type has_type;
411 unsigned long has_size;
412 has_data = read_sha1_file(sha1, &has_type, &has_size);
413 if (!has_data)
414 die("cannot read existing object %s", sha1_to_hex(sha1));
415 if (size != has_size || type != has_type ||
416 memcmp(data, has_data, size) != 0)
417 die("SHA1 COLLISION FOUND WITH %s !", sha1_to_hex(sha1));
418 free(has_data);
419 }
420 if (strict) {
421 if (type == OBJ_BLOB) {
422 struct blob *blob = lookup_blob(sha1);
423 if (blob)
424 blob->object.flags |= FLAG_CHECKED;
425 else
426 die("invalid blob object %s", sha1_to_hex(sha1));
427 } else {
428 struct object *obj;
429 int eaten;
430 void *buf = (void *) data;
431 /*
433 * we do not need to free the memory here, as the
434 * buf is deleted by the caller.
435 */
436 obj = parse_object_buffer(sha1, type, size, buf, &eaten);
437 if (!obj)
438 die("invalid %s", typename(type));
439 if (fsck_object(obj, 1, fsck_error_function))
440 die("Error in object");
441 if (fsck_walk(obj, mark_link, 0))
442 die("Not all child objects of %s are reachable", sha1_to_hex(obj->sha1));
443 if (obj->type == OBJ_TREE) {
445 struct tree *item = (struct tree *) obj;
446 item->buffer = NULL;
447 }
448 if (obj->type == OBJ_COMMIT) {
449 struct commit *commit = (struct commit *) obj;
450 commit->buffer = NULL;
451 }
452 obj->flags |= FLAG_CHECKED;
453 }
454 }
455}
456static void resolve_delta(struct object_entry *delta_obj,
458 struct base_data *base_obj, enum object_type type)
459{
460 void *delta_data;
461 unsigned long delta_size;
462 union delta_base delta_base;
463 int j, first, last;
464 struct base_data result;
465 delta_obj->real_type = type;
467 delta_data = get_data_from_pack(delta_obj);
468 delta_size = delta_obj->size;
469 result.data = patch_delta(base_obj->data, base_obj->size,
470 delta_data, delta_size,
471 &result.size);
472 free(delta_data);
473 if (!result.data)
474 bad_object(delta_obj->idx.offset, "failed to apply delta");
475 sha1_object(result.data, result.size, type, delta_obj->idx.sha1);
476 nr_resolved_deltas++;
477 link_base_data(base_obj, &result);
479 hashcpy(delta_base.sha1, delta_obj->idx.sha1);
481 if (!find_delta_children(&delta_base, &first, &last)) {
482 for (j = first; j <= last; j++) {
483 struct object_entry *child = objects + deltas[j].obj_no;
484 if (child->real_type == OBJ_REF_DELTA)
485 resolve_delta(child, &result, type);
486 }
487 }
488 memset(&delta_base, 0, sizeof(delta_base));
490 delta_base.offset = delta_obj->idx.offset;
491 if (!find_delta_children(&delta_base, &first, &last)) {
492 for (j = first; j <= last; j++) {
493 struct object_entry *child = objects + deltas[j].obj_no;
494 if (child->real_type == OBJ_OFS_DELTA)
495 resolve_delta(child, &result, type);
496 }
497 }
498 unlink_base_data(&result);
500}
501static int compare_delta_entry(const void *a, const void *b)
503{
504 const struct delta_entry *delta_a = a;
505 const struct delta_entry *delta_b = b;
506 return memcmp(&delta_a->base, &delta_b->base, UNION_BASE_SZ);
507}
508/* Parse all objects and return the pack content SHA1 hash */
510static void parse_pack_objects(unsigned char *sha1)
511{
512 int i;
513 struct delta_entry *delta = deltas;
514 struct stat st;
515 /*
517 * First pass:
518 * - find locations of all objects;
519 * - calculate SHA1 of all non-delta objects;
520 * - remember base (SHA1 or offset) for all deltas.
521 */
522 if (verbose)
523 progress = start_progress(
524 from_stdin ? "Receiving objects" : "Indexing objects",
525 nr_objects);
526 for (i = 0; i < nr_objects; i++) {
527 struct object_entry *obj = &objects[i];
528 void *data = unpack_raw_entry(obj, &delta->base);
529 obj->real_type = obj->type;
530 if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) {
531 nr_deltas++;
532 delta->obj_no = i;
533 delta++;
534 } else
535 sha1_object(data, obj->size, obj->type, obj->idx.sha1);
536 free(data);
537 display_progress(progress, i+1);
538 }
539 objects[i].idx.offset = consumed_bytes;
540 stop_progress(&progress);
541 /* Check pack integrity */
543 flush();
544 SHA1_Final(sha1, &input_ctx);
545 if (hashcmp(fill(20), sha1))
546 die("pack is corrupted (SHA1 mismatch)");
547 use(20);
548 /* If input_fd is a file, we should have reached its end now. */
550 if (fstat(input_fd, &st))
551 die("cannot fstat packfile: %s", strerror(errno));
552 if (S_ISREG(st.st_mode) &&
553 lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size)
554 die("pack has junk at the end");
555 if (!nr_deltas)
557 return;
558 /* Sort deltas by base SHA1/offset for fast searching */
560 qsort(deltas, nr_deltas, sizeof(struct delta_entry),
561 compare_delta_entry);
562 /*
564 * Second pass:
565 * - for all non-delta objects, look if it is used as a base for
566 * deltas;
567 * - if used as a base, uncompress the object and apply all deltas,
568 * recursively checking if the resulting object is used as a base
569 * for some more deltas.
570 */
571 if (verbose)
572 progress = start_progress("Resolving deltas", nr_deltas);
573 for (i = 0; i < nr_objects; i++) {
574 struct object_entry *obj = &objects[i];
575 union delta_base base;
576 int j, ref, ref_first, ref_last, ofs, ofs_first, ofs_last;
577 struct base_data base_obj;
578 if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA)
580 continue;
581 hashcpy(base.sha1, obj->idx.sha1);
582 ref = !find_delta_children(&base, &ref_first, &ref_last);
583 memset(&base, 0, sizeof(base));
584 base.offset = obj->idx.offset;
585 ofs = !find_delta_children(&base, &ofs_first, &ofs_last);
586 if (!ref && !ofs)
587 continue;
588 base_obj.data = get_data_from_pack(obj);
589 base_obj.size = obj->size;
590 link_base_data(NULL, &base_obj);
591 if (ref)
593 for (j = ref_first; j <= ref_last; j++) {
594 struct object_entry *child = objects + deltas[j].obj_no;
595 if (child->real_type == OBJ_REF_DELTA)
596 resolve_delta(child, &base_obj, obj->type);
597 }
598 if (ofs)
599 for (j = ofs_first; j <= ofs_last; j++) {
600 struct object_entry *child = objects + deltas[j].obj_no;
601 if (child->real_type == OBJ_OFS_DELTA)
602 resolve_delta(child, &base_obj, obj->type);
603 }
604 unlink_base_data(&base_obj);
605 display_progress(progress, nr_resolved_deltas);
606 }
607}
608static int write_compressed(int fd, void *in, unsigned int size, uint32_t *obj_crc)
610{
611 z_stream stream;
612 unsigned long maxsize;
613 void *out;
614 memset(&stream, 0, sizeof(stream));
616 deflateInit(&stream, zlib_compression_level);
617 maxsize = deflateBound(&stream, size);
618 out = xmalloc(maxsize);
619 /* Compress it */
621 stream.next_in = in;
622 stream.avail_in = size;
623 stream.next_out = out;
624 stream.avail_out = maxsize;
625 while (deflate(&stream, Z_FINISH) == Z_OK);
626 deflateEnd(&stream);
627 size = stream.total_out;
629 write_or_die(fd, out, size);
630 *obj_crc = crc32(*obj_crc, out, size);
631 free(out);
632 return size;
633}
634static void append_obj_to_pack(const unsigned char *sha1, void *buf,
636 unsigned long size, enum object_type type)
637{
638 struct object_entry *obj = &objects[nr_objects++];
639 unsigned char header[10];
640 unsigned long s = size;
641 int n = 0;
642 unsigned char c = (type << 4) | (s & 15);
643 s >>= 4;
644 while (s) {
645 header[n++] = c | 0x80;
646 c = s & 0x7f;
647 s >>= 7;
648 }
649 header[n++] = c;
650 write_or_die(output_fd, header, n);
651 obj[0].idx.crc32 = crc32(0, Z_NULL, 0);
652 obj[0].idx.crc32 = crc32(obj[0].idx.crc32, header, n);
653 obj[1].idx.offset = obj[0].idx.offset + n;
654 obj[1].idx.offset += write_compressed(output_fd, buf, size, &obj[0].idx.crc32);
655 hashcpy(obj->idx.sha1, sha1);
656}
657static int delta_pos_compare(const void *_a, const void *_b)
659{
660 struct delta_entry *a = *(struct delta_entry **)_a;
661 struct delta_entry *b = *(struct delta_entry **)_b;
662 return a->obj_no - b->obj_no;
663}
664static void fix_unresolved_deltas(int nr_unresolved)
666{
667 struct delta_entry **sorted_by_pos;
668 int i, n = 0;
669 /*
671 * Since many unresolved deltas may well be themselves base objects
672 * for more unresolved deltas, we really want to include the
673 * smallest number of base objects that would cover as much delta
674 * as possible by picking the
675 * trunc deltas first, allowing for other deltas to resolve without
676 * additional base objects. Since most base objects are to be found
677 * before deltas depending on them, a good heuristic is to start
678 * resolving deltas in the same order as their position in the pack.
679 */
680 sorted_by_pos = xmalloc(nr_unresolved * sizeof(*sorted_by_pos));
681 for (i = 0; i < nr_deltas; i++) {
682 if (objects[deltas[i].obj_no].real_type != OBJ_REF_DELTA)
683 continue;
684 sorted_by_pos[n++] = &deltas[i];
685 }
686 qsort(sorted_by_pos, n, sizeof(*sorted_by_pos), delta_pos_compare);
687 for (i = 0; i < n; i++) {
689 struct delta_entry *d = sorted_by_pos[i];
690 enum object_type type;
691 int j, first, last;
692 struct base_data base_obj;
693 if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
695 continue;
696 base_obj.data = read_sha1_file(d->base.sha1, &type, &base_obj.size);
697 if (!base_obj.data)
698 continue;
699 link_base_data(NULL, &base_obj);
700 find_delta_children(&d->base, &first, &last);
702 for (j = first; j <= last; j++) {
703 struct object_entry *child = objects + deltas[j].obj_no;
704 if (child->real_type == OBJ_REF_DELTA)
705 resolve_delta(child, &base_obj, type);
706 }
707 if (check_sha1_signature(d->base.sha1, base_obj.data,
709 base_obj.size, typename(type)))
710 die("local object %s is corrupt", sha1_to_hex(d->base.sha1));
711 append_obj_to_pack(d->base.sha1, base_obj.data,
712 base_obj.size, type);
713 unlink_base_data(&base_obj);
714 display_progress(progress, nr_resolved_deltas);
715 }
716 free(sorted_by_pos);
717}
718static void final(const char *final_pack_name, const char *curr_pack_name,
720 const char *final_index_name, const char *curr_index_name,
721 const char *keep_name, const char *keep_msg,
722 unsigned char *sha1)
723{
724 const char *report = "pack";
725 char name[PATH_MAX];
726 int err;
727 if (!from_stdin) {
729 close(input_fd);
730 } else {
731 fsync_or_die(output_fd, curr_pack_name);
732 err = close(output_fd);
733 if (err)
734 die("error while closing pack file: %s", strerror(errno));
735 chmod(curr_pack_name, 0444);
736 }
737 if (keep_msg) {
739 int keep_fd, keep_msg_len = strlen(keep_msg);
740 if (!keep_name) {
741 snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
742 get_object_directory(), sha1_to_hex(sha1));
743 keep_name = name;
744 }
745 keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600);
746 if (keep_fd < 0) {
747 if (errno != EEXIST)
748 die("cannot write keep file");
749 } else {
750 if (keep_msg_len > 0) {
751 write_or_die(keep_fd, keep_msg, keep_msg_len);
752 write_or_die(keep_fd, "\n", 1);
753 }
754 if (close(keep_fd) != 0)
755 die("cannot write keep file");
756 report = "keep";
757 }
758 }
759 if (final_pack_name != curr_pack_name) {
761 if (!final_pack_name) {
762 snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
763 get_object_directory(), sha1_to_hex(sha1));
764 final_pack_name = name;
765 }
766 if (move_temp_to_file(curr_pack_name, final_pack_name))
767 die("cannot store pack file");
768 }
769 chmod(curr_index_name, 0444);
771 if (final_index_name != curr_index_name) {
772 if (!final_index_name) {
773 snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
774 get_object_directory(), sha1_to_hex(sha1));
775 final_index_name = name;
776 }
777 if (move_temp_to_file(curr_index_name, final_index_name))
778 die("cannot store index file");
779 }
780 if (!from_stdin) {
782 printf("%s\n", sha1_to_hex(sha1));
783 } else {
784 char buf[48];
785 int len = snprintf(buf, sizeof(buf), "%s\t%s\n",
786 report, sha1_to_hex(sha1));
787 write_or_die(1, buf, len);
788 /*
790 * Let's just mimic git-unpack-objects here and write
791 * the last part of the input buffer to stdout.
792 */
793 while (input_len) {
794 err = xwrite(1, input_buffer + input_offset, input_len);
795 if (err <= 0)
796 break;
797 input_len -= err;
798 input_offset += err;
799 }
800 }
801}
802static int git_index_pack_config(const char *k, const char *v, void *cb)
804{
805 if (!strcmp(k, "pack.indexversion")) {
806 pack_idx_default_version = git_config_int(k, v);
807 if (pack_idx_default_version > 2)
808 die("bad pack.indexversion=%d", pack_idx_default_version);
809 return 0;
810 }
811 return git_default_config(k, v, cb);
812}
813int main(int argc, char **argv)
815{
816 int i, fix_thin_pack = 0;
817 char *curr_pack, *pack_name = NULL;
818 char *curr_index, *index_name = NULL;
819 const char *keep_name = NULL, *keep_msg = NULL;
820 char *index_name_buf = NULL, *keep_name_buf = NULL;
821 struct pack_idx_entry **idx_objects;
822 unsigned char sha1[20];
823 git_config(git_index_pack_config, NULL);
825 for (i = 1; i < argc; i++) {
827 char *arg = argv[i];
828 if (*arg == '-') {
830 if (!strcmp(arg, "--stdin")) {
831 from_stdin = 1;
832 } else if (!strcmp(arg, "--fix-thin")) {
833 fix_thin_pack = 1;
834 } else if (!strcmp(arg, "--strict")) {
835 strict = 1;
836 } else if (!strcmp(arg, "--keep")) {
837 keep_msg = "";
838 } else if (!prefixcmp(arg, "--keep=")) {
839 keep_msg = arg + 7;
840 } else if (!prefixcmp(arg, "--pack_header=")) {
841 struct pack_header *hdr;
842 char *c;
843 hdr = (struct pack_header *)input_buffer;
845 hdr->hdr_signature = htonl(PACK_SIGNATURE);
846 hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
847 if (*c != ',')
848 die("bad %s", arg);
849 hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
850 if (*c)
851 die("bad %s", arg);
852 input_len = sizeof(*hdr);
853 } else if (!strcmp(arg, "-v")) {
854 verbose = 1;
855 } else if (!strcmp(arg, "-o")) {
856 if (index_name || (i+1) >= argc)
857 usage(index_pack_usage);
858 index_name = argv[++i];
859 } else if (!prefixcmp(arg, "--index-version=")) {
860 char *c;
861 pack_idx_default_version = strtoul(arg + 16, &c, 10);
862 if (pack_idx_default_version > 2)
863 die("bad %s", arg);
864 if (*c == ',')
865 pack_idx_off32_limit = strtoul(c+1, &c, 0);
866 if (*c || pack_idx_off32_limit & 0x80000000)
867 die("bad %s", arg);
868 } else
869 usage(index_pack_usage);
870 continue;
871 }
872 if (pack_name)
874 usage(index_pack_usage);
875 pack_name = arg;
876 }
877 if (!pack_name && !from_stdin)
879 usage(index_pack_usage);
880 if (fix_thin_pack && !from_stdin)
881 die("--fix-thin cannot be used without --stdin");
882 if (!index_name && pack_name) {
883 int len = strlen(pack_name);
884 if (!has_extension(pack_name, ".pack"))
885 die("packfile name '%s' does not end with '.pack'",
886 pack_name);
887 index_name_buf = xmalloc(len);
888 memcpy(index_name_buf, pack_name, len - 5);
889 strcpy(index_name_buf + len - 5, ".idx");
890 index_name = index_name_buf;
891 }
892 if (keep_msg && !keep_name && pack_name) {
893 int len = strlen(pack_name);
894 if (!has_extension(pack_name, ".pack"))
895 die("packfile name '%s' does not end with '.pack'",
896 pack_name);
897 keep_name_buf = xmalloc(len);
898 memcpy(keep_name_buf, pack_name, len - 5);
899 strcpy(keep_name_buf + len - 5, ".keep");
900 keep_name = keep_name_buf;
901 }
902 curr_pack = open_pack_file(pack_name);
904 parse_pack_header();
905 objects = xmalloc((nr_objects + 1) * sizeof(struct object_entry));
906 deltas = xmalloc(nr_objects * sizeof(struct delta_entry));
907 parse_pack_objects(sha1);
908 if (nr_deltas == nr_resolved_deltas) {
909 stop_progress(&progress);
910 /* Flush remaining pack final 20-byte SHA1. */
911 flush();
912 } else {
913 if (fix_thin_pack) {
914 char msg[48];
915 int nr_unresolved = nr_deltas - nr_resolved_deltas;
916 int nr_objects_initial = nr_objects;
917 if (nr_unresolved <= 0)
918 die("confusion beyond insanity");
919 objects = xrealloc(objects,
920 (nr_objects + nr_unresolved + 1)
921 * sizeof(*objects));
922 fix_unresolved_deltas(nr_unresolved);
923 sprintf(msg, "completed with %d local objects",
924 nr_objects - nr_objects_initial);
925 stop_progress_msg(&progress, msg);
926 fixup_pack_header_footer(output_fd, sha1,
927 curr_pack, nr_objects);
928 }
929 if (nr_deltas != nr_resolved_deltas)
930 die("pack has %d unresolved deltas",
931 nr_deltas - nr_resolved_deltas);
932 }
933 free(deltas);
934 if (strict)
935 check_objects();
936 idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *));
938 for (i = 0; i < nr_objects; i++)
939 idx_objects[i] = &objects[i].idx;
940 curr_index = write_idx_file(index_name, idx_objects, nr_objects, sha1);
941 free(idx_objects);
942 final(pack_name, curr_pack,
944 index_name, curr_index,
945 keep_name, keep_msg,
946 sha1);
947 free(objects);
948 free(index_name_buf);
949 free(keep_name_buf);
950 if (pack_name == NULL)
951 free(curr_pack);
952 if (index_name == NULL)
953 free(curr_index);
954 return 0;
956}