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Commit | Line | Data |
---|---|---|
9cf6d335 SV |
1 | #include "cache.h" |
2 | #include "delta.h" | |
3 | #include "pack.h" | |
4 | #include "csum-file.h" | |
8e440259 PE |
5 | #include "blob.h" |
6 | #include "commit.h" | |
7 | #include "tag.h" | |
8 | #include "tree.h" | |
96a02f8f | 9 | #include "progress.h" |
0153be05 | 10 | #include "fsck.h" |
9cf6d335 SV |
11 | |
12 | static const char index_pack_usage[] = | |
0153be05 | 13 | "git-index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }"; |
9cf6d335 SV |
14 | |
15 | struct object_entry | |
16 | { | |
aa7e44bf | 17 | struct pack_idx_entry idx; |
2d477051 NP |
18 | unsigned long size; |
19 | unsigned int hdr_size; | |
9cf6d335 SV |
20 | enum object_type type; |
21 | enum object_type real_type; | |
9cf6d335 SV |
22 | }; |
23 | ||
53dda6ff NP |
24 | union delta_base { |
25 | unsigned char sha1[20]; | |
d7dd0223 | 26 | off_t offset; |
53dda6ff NP |
27 | }; |
28 | ||
f41aebd4 | 29 | struct base_data { |
4a438cab SP |
30 | struct base_data *base; |
31 | struct base_data *child; | |
03993e13 | 32 | struct object_entry *obj; |
f41aebd4 SP |
33 | void *data; |
34 | unsigned long size; | |
35 | }; | |
36 | ||
3c552873 NP |
37 | /* |
38 | * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want | |
39 | * to memcmp() only the first 20 bytes. | |
40 | */ | |
41 | #define UNION_BASE_SZ 20 | |
42 | ||
0153be05 MK |
43 | #define FLAG_LINK (1u<<20) |
44 | #define FLAG_CHECKED (1u<<21) | |
45 | ||
9cf6d335 SV |
46 | struct delta_entry |
47 | { | |
53dda6ff | 48 | union delta_base base; |
636171cb | 49 | int obj_no; |
9cf6d335 SV |
50 | }; |
51 | ||
9cf6d335 SV |
52 | static struct object_entry *objects; |
53 | static struct delta_entry *deltas; | |
4a438cab | 54 | static struct base_data *base_cache; |
9cf6d335 SV |
55 | static int nr_objects; |
56 | static int nr_deltas; | |
636171cb | 57 | static int nr_resolved_deltas; |
9cf6d335 | 58 | |
e42797f5 | 59 | static int from_stdin; |
0153be05 | 60 | static int strict; |
3c9af366 NP |
61 | static int verbose; |
62 | ||
dc6a0757 | 63 | static struct progress *progress; |
e42797f5 | 64 | |
2d477051 NP |
65 | /* We always read in 4kB chunks. */ |
66 | static unsigned char input_buffer[4096]; | |
d7dd0223 NP |
67 | static unsigned int input_offset, input_len; |
68 | static off_t consumed_bytes; | |
2d477051 | 69 | static SHA_CTX input_ctx; |
ee5743ce | 70 | static uint32_t input_crc32; |
6d2fa7f1 | 71 | static int input_fd, output_fd, pack_fd; |
2d477051 | 72 | |
0153be05 MK |
73 | static int mark_link(struct object *obj, int type, void *data) |
74 | { | |
75 | if (!obj) | |
76 | return -1; | |
77 | ||
78 | if (type != OBJ_ANY && obj->type != type) | |
79 | die("object type mismatch at %s", sha1_to_hex(obj->sha1)); | |
80 | ||
81 | obj->flags |= FLAG_LINK; | |
82 | return 0; | |
83 | } | |
84 | ||
85 | /* The content of each linked object must have been checked | |
86 | or it must be already present in the object database */ | |
87 | static void check_object(struct object *obj) | |
88 | { | |
89 | if (!obj) | |
90 | return; | |
91 | ||
92 | if (!(obj->flags & FLAG_LINK)) | |
93 | return; | |
94 | ||
95 | if (!(obj->flags & FLAG_CHECKED)) { | |
96 | unsigned long size; | |
97 | int type = sha1_object_info(obj->sha1, &size); | |
98 | if (type != obj->type || type <= 0) | |
99 | die("object of unexpected type"); | |
100 | obj->flags |= FLAG_CHECKED; | |
101 | return; | |
102 | } | |
103 | } | |
104 | ||
105 | static void check_objects(void) | |
106 | { | |
107 | unsigned i, max; | |
108 | ||
109 | max = get_max_object_index(); | |
110 | for (i = 0; i < max; i++) | |
111 | check_object(get_indexed_object(i)); | |
112 | } | |
113 | ||
114 | ||
636171cb | 115 | /* Discard current buffer used content. */ |
a6e8a767 | 116 | static void flush(void) |
636171cb NP |
117 | { |
118 | if (input_offset) { | |
119 | if (output_fd >= 0) | |
120 | write_or_die(output_fd, input_buffer, input_offset); | |
121 | SHA1_Update(&input_ctx, input_buffer, input_offset); | |
554a2636 | 122 | memmove(input_buffer, input_buffer + input_offset, input_len); |
636171cb NP |
123 | input_offset = 0; |
124 | } | |
125 | } | |
126 | ||
2d477051 NP |
127 | /* |
128 | * Make sure at least "min" bytes are available in the buffer, and | |
129 | * return the pointer to the buffer. | |
130 | */ | |
b89c4e93 | 131 | static void *fill(int min) |
9cf6d335 | 132 | { |
2d477051 NP |
133 | if (min <= input_len) |
134 | return input_buffer + input_offset; | |
135 | if (min > sizeof(input_buffer)) | |
136 | die("cannot fill %d bytes", min); | |
636171cb | 137 | flush(); |
2d477051 | 138 | do { |
8a912bcb | 139 | ssize_t ret = xread(input_fd, input_buffer + input_len, |
2d477051 NP |
140 | sizeof(input_buffer) - input_len); |
141 | if (ret <= 0) { | |
142 | if (!ret) | |
143 | die("early EOF"); | |
144 | die("read error on input: %s", strerror(errno)); | |
145 | } | |
146 | input_len += ret; | |
218558af NP |
147 | if (from_stdin) |
148 | display_throughput(progress, consumed_bytes + input_len); | |
2d477051 NP |
149 | } while (input_len < min); |
150 | return input_buffer; | |
151 | } | |
152 | ||
153 | static void use(int bytes) | |
154 | { | |
155 | if (bytes > input_len) | |
156 | die("used more bytes than were available"); | |
ee5743ce | 157 | input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes); |
2d477051 NP |
158 | input_len -= bytes; |
159 | input_offset += bytes; | |
d7dd0223 NP |
160 | |
161 | /* make sure off_t is sufficiently large not to wrap */ | |
162 | if (consumed_bytes > consumed_bytes + bytes) | |
163 | die("pack too large for current definition of off_t"); | |
2d477051 NP |
164 | consumed_bytes += bytes; |
165 | } | |
9cf6d335 | 166 | |
4049b9cf | 167 | static char *open_pack_file(char *pack_name) |
2d477051 | 168 | { |
e42797f5 NP |
169 | if (from_stdin) { |
170 | input_fd = 0; | |
171 | if (!pack_name) { | |
172 | static char tmpfile[PATH_MAX]; | |
173 | snprintf(tmpfile, sizeof(tmpfile), | |
0e55181f | 174 | "%s/tmp_pack_XXXXXX", get_object_directory()); |
7647b17f | 175 | output_fd = xmkstemp(tmpfile); |
e42797f5 NP |
176 | pack_name = xstrdup(tmpfile); |
177 | } else | |
178 | output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600); | |
179 | if (output_fd < 0) | |
180 | die("unable to create %s: %s\n", pack_name, strerror(errno)); | |
6d2fa7f1 | 181 | pack_fd = output_fd; |
e42797f5 NP |
182 | } else { |
183 | input_fd = open(pack_name, O_RDONLY); | |
184 | if (input_fd < 0) | |
185 | die("cannot open packfile '%s': %s", | |
186 | pack_name, strerror(errno)); | |
187 | output_fd = -1; | |
6d2fa7f1 | 188 | pack_fd = input_fd; |
e42797f5 | 189 | } |
2d477051 | 190 | SHA1_Init(&input_ctx); |
e42797f5 | 191 | return pack_name; |
9cf6d335 SV |
192 | } |
193 | ||
194 | static void parse_pack_header(void) | |
195 | { | |
2d477051 | 196 | struct pack_header *hdr = fill(sizeof(struct pack_header)); |
9cf6d335 SV |
197 | |
198 | /* Header consistency check */ | |
9cf6d335 | 199 | if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) |
e42797f5 | 200 | die("pack signature mismatch"); |
d60fc1c8 | 201 | if (!pack_version_ok(hdr->hdr_version)) |
e42797f5 | 202 | die("pack version %d unsupported", ntohl(hdr->hdr_version)); |
9cf6d335 SV |
203 | |
204 | nr_objects = ntohl(hdr->hdr_entries); | |
2d477051 | 205 | use(sizeof(struct pack_header)); |
9cf6d335 SV |
206 | } |
207 | ||
208 | static void bad_object(unsigned long offset, const char *format, | |
209 | ...) NORETURN __attribute__((format (printf, 2, 3))); | |
210 | ||
211 | static void bad_object(unsigned long offset, const char *format, ...) | |
212 | { | |
213 | va_list params; | |
214 | char buf[1024]; | |
215 | ||
216 | va_start(params, format); | |
217 | vsnprintf(buf, sizeof(buf), format, params); | |
218 | va_end(params); | |
e42797f5 | 219 | die("pack has bad object at offset %lu: %s", offset, buf); |
9cf6d335 SV |
220 | } |
221 | ||
4a438cab SP |
222 | static void link_base_data(struct base_data *base, struct base_data *c) |
223 | { | |
224 | if (base) | |
225 | base->child = c; | |
226 | else | |
227 | base_cache = c; | |
228 | ||
229 | c->base = base; | |
230 | c->child = NULL; | |
231 | } | |
232 | ||
233 | static void unlink_base_data(struct base_data *c) | |
234 | { | |
235 | struct base_data *base = c->base; | |
236 | if (base) | |
237 | base->child = NULL; | |
238 | else | |
239 | base_cache = NULL; | |
240 | free(c->data); | |
241 | } | |
242 | ||
2d477051 | 243 | static void *unpack_entry_data(unsigned long offset, unsigned long size) |
9cf6d335 | 244 | { |
9cf6d335 SV |
245 | z_stream stream; |
246 | void *buf = xmalloc(size); | |
247 | ||
248 | memset(&stream, 0, sizeof(stream)); | |
249 | stream.next_out = buf; | |
250 | stream.avail_out = size; | |
2d477051 NP |
251 | stream.next_in = fill(1); |
252 | stream.avail_in = input_len; | |
9cf6d335 SV |
253 | inflateInit(&stream); |
254 | ||
255 | for (;;) { | |
256 | int ret = inflate(&stream, 0); | |
2d477051 NP |
257 | use(input_len - stream.avail_in); |
258 | if (stream.total_out == size && ret == Z_STREAM_END) | |
9cf6d335 SV |
259 | break; |
260 | if (ret != Z_OK) | |
261 | bad_object(offset, "inflate returned %d", ret); | |
2d477051 NP |
262 | stream.next_in = fill(1); |
263 | stream.avail_in = input_len; | |
9cf6d335 SV |
264 | } |
265 | inflateEnd(&stream); | |
9cf6d335 SV |
266 | return buf; |
267 | } | |
268 | ||
2d477051 | 269 | static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base) |
9cf6d335 | 270 | { |
2d477051 | 271 | unsigned char *p, c; |
d7dd0223 NP |
272 | unsigned long size; |
273 | off_t base_offset; | |
9cf6d335 | 274 | unsigned shift; |
ee5743ce | 275 | void *data; |
9cf6d335 | 276 | |
aa7e44bf | 277 | obj->idx.offset = consumed_bytes; |
ee5743ce | 278 | input_crc32 = crc32(0, Z_NULL, 0); |
2d477051 NP |
279 | |
280 | p = fill(1); | |
281 | c = *p; | |
282 | use(1); | |
283 | obj->type = (c >> 4) & 7; | |
9cf6d335 SV |
284 | size = (c & 15); |
285 | shift = 4; | |
286 | while (c & 0x80) { | |
2d477051 NP |
287 | p = fill(1); |
288 | c = *p; | |
289 | use(1); | |
9cf6d335 SV |
290 | size += (c & 0x7fUL) << shift; |
291 | shift += 7; | |
292 | } | |
2d477051 | 293 | obj->size = size; |
9cf6d335 | 294 | |
2d477051 | 295 | switch (obj->type) { |
eb32d236 | 296 | case OBJ_REF_DELTA: |
2d477051 NP |
297 | hashcpy(delta_base->sha1, fill(20)); |
298 | use(20); | |
53dda6ff NP |
299 | break; |
300 | case OBJ_OFS_DELTA: | |
301 | memset(delta_base, 0, sizeof(*delta_base)); | |
2d477051 NP |
302 | p = fill(1); |
303 | c = *p; | |
304 | use(1); | |
53dda6ff NP |
305 | base_offset = c & 127; |
306 | while (c & 128) { | |
307 | base_offset += 1; | |
8723f216 | 308 | if (!base_offset || MSB(base_offset, 7)) |
aa7e44bf | 309 | bad_object(obj->idx.offset, "offset value overflow for delta base object"); |
2d477051 NP |
310 | p = fill(1); |
311 | c = *p; | |
312 | use(1); | |
53dda6ff NP |
313 | base_offset = (base_offset << 7) + (c & 127); |
314 | } | |
aa7e44bf GB |
315 | delta_base->offset = obj->idx.offset - base_offset; |
316 | if (delta_base->offset >= obj->idx.offset) | |
317 | bad_object(obj->idx.offset, "delta base offset is out of bound"); | |
53dda6ff | 318 | break; |
9cf6d335 SV |
319 | case OBJ_COMMIT: |
320 | case OBJ_TREE: | |
321 | case OBJ_BLOB: | |
322 | case OBJ_TAG: | |
9cf6d335 SV |
323 | break; |
324 | default: | |
aa7e44bf | 325 | bad_object(obj->idx.offset, "unknown object type %d", obj->type); |
9cf6d335 | 326 | } |
aa7e44bf | 327 | obj->hdr_size = consumed_bytes - obj->idx.offset; |
2d477051 | 328 | |
aa7e44bf GB |
329 | data = unpack_entry_data(obj->idx.offset, obj->size); |
330 | obj->idx.crc32 = input_crc32; | |
ee5743ce | 331 | return data; |
2d477051 NP |
332 | } |
333 | ||
b89c4e93 | 334 | static void *get_data_from_pack(struct object_entry *obj) |
2d477051 | 335 | { |
a91ef6e7 | 336 | off_t from = obj[0].idx.offset + obj[0].hdr_size; |
aa7e44bf | 337 | unsigned long len = obj[1].idx.offset - from; |
a91d49cd | 338 | unsigned long rdy = 0; |
6d2fa7f1 | 339 | unsigned char *src, *data; |
2d477051 NP |
340 | z_stream stream; |
341 | int st; | |
9cf6d335 | 342 | |
6d2fa7f1 | 343 | src = xmalloc(len); |
a91d49cd SP |
344 | data = src; |
345 | do { | |
346 | ssize_t n = pread(pack_fd, data + rdy, len - rdy, from + rdy); | |
347 | if (n <= 0) | |
348 | die("cannot pread pack file: %s", strerror(errno)); | |
349 | rdy += n; | |
350 | } while (rdy < len); | |
2d477051 NP |
351 | data = xmalloc(obj->size); |
352 | memset(&stream, 0, sizeof(stream)); | |
353 | stream.next_out = data; | |
354 | stream.avail_out = obj->size; | |
6d2fa7f1 | 355 | stream.next_in = src; |
2d477051 NP |
356 | stream.avail_in = len; |
357 | inflateInit(&stream); | |
358 | while ((st = inflate(&stream, Z_FINISH)) == Z_OK); | |
359 | inflateEnd(&stream); | |
360 | if (st != Z_STREAM_END || stream.total_out != obj->size) | |
361 | die("serious inflate inconsistency"); | |
6d2fa7f1 | 362 | free(src); |
9cf6d335 SV |
363 | return data; |
364 | } | |
365 | ||
53dda6ff | 366 | static int find_delta(const union delta_base *base) |
9cf6d335 SV |
367 | { |
368 | int first = 0, last = nr_deltas; | |
369 | ||
370 | while (first < last) { | |
371 | int next = (first + last) / 2; | |
372 | struct delta_entry *delta = &deltas[next]; | |
373 | int cmp; | |
374 | ||
3c552873 | 375 | cmp = memcmp(base, &delta->base, UNION_BASE_SZ); |
9cf6d335 SV |
376 | if (!cmp) |
377 | return next; | |
378 | if (cmp < 0) { | |
379 | last = next; | |
380 | continue; | |
381 | } | |
382 | first = next+1; | |
383 | } | |
384 | return -first-1; | |
385 | } | |
386 | ||
b89c4e93 NP |
387 | static int find_delta_children(const union delta_base *base, |
388 | int *first_index, int *last_index) | |
9cf6d335 | 389 | { |
53dda6ff | 390 | int first = find_delta(base); |
9cf6d335 SV |
391 | int last = first; |
392 | int end = nr_deltas - 1; | |
393 | ||
394 | if (first < 0) | |
395 | return -1; | |
3c552873 | 396 | while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ)) |
9cf6d335 | 397 | --first; |
3c552873 | 398 | while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ)) |
9cf6d335 SV |
399 | ++last; |
400 | *first_index = first; | |
401 | *last_index = last; | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static void sha1_object(const void *data, unsigned long size, | |
9096c660 | 406 | enum object_type type, unsigned char *sha1) |
9cf6d335 | 407 | { |
ce9fbf16 | 408 | hash_sha1_file(data, size, typename(type), sha1); |
9096c660 | 409 | if (has_sha1_file(sha1)) { |
8685da42 NP |
410 | void *has_data; |
411 | enum object_type has_type; | |
412 | unsigned long has_size; | |
413 | has_data = read_sha1_file(sha1, &has_type, &has_size); | |
414 | if (!has_data) | |
415 | die("cannot read existing object %s", sha1_to_hex(sha1)); | |
416 | if (size != has_size || type != has_type || | |
417 | memcmp(data, has_data, size) != 0) | |
418 | die("SHA1 COLLISION FOUND WITH %s !", sha1_to_hex(sha1)); | |
bbf4b41b | 419 | free(has_data); |
8685da42 | 420 | } |
0153be05 MK |
421 | if (strict) { |
422 | if (type == OBJ_BLOB) { | |
423 | struct blob *blob = lookup_blob(sha1); | |
424 | if (blob) | |
425 | blob->object.flags |= FLAG_CHECKED; | |
426 | else | |
427 | die("invalid blob object %s", sha1_to_hex(sha1)); | |
428 | } else { | |
429 | struct object *obj; | |
430 | int eaten; | |
431 | void *buf = (void *) data; | |
432 | ||
433 | /* | |
434 | * we do not need to free the memory here, as the | |
435 | * buf is deleted by the caller. | |
436 | */ | |
437 | obj = parse_object_buffer(sha1, type, size, buf, &eaten); | |
438 | if (!obj) | |
439 | die("invalid %s", typename(type)); | |
440 | if (fsck_object(obj, 1, fsck_error_function)) | |
441 | die("Error in object"); | |
442 | if (fsck_walk(obj, mark_link, 0)) | |
443 | die("Not all child objects of %s are reachable", sha1_to_hex(obj->sha1)); | |
444 | ||
445 | if (obj->type == OBJ_TREE) { | |
446 | struct tree *item = (struct tree *) obj; | |
447 | item->buffer = NULL; | |
448 | } | |
449 | if (obj->type == OBJ_COMMIT) { | |
450 | struct commit *commit = (struct commit *) obj; | |
451 | commit->buffer = NULL; | |
452 | } | |
453 | obj->flags |= FLAG_CHECKED; | |
454 | } | |
455 | } | |
9cf6d335 SV |
456 | } |
457 | ||
f41aebd4 SP |
458 | static void resolve_delta(struct object_entry *delta_obj, |
459 | struct base_data *base_obj, enum object_type type) | |
9cf6d335 | 460 | { |
9cf6d335 SV |
461 | void *delta_data; |
462 | unsigned long delta_size; | |
53dda6ff | 463 | union delta_base delta_base; |
9cf6d335 | 464 | int j, first, last; |
f41aebd4 | 465 | struct base_data result; |
9cf6d335 | 466 | |
636171cb NP |
467 | delta_obj->real_type = type; |
468 | delta_data = get_data_from_pack(delta_obj); | |
469 | delta_size = delta_obj->size; | |
f41aebd4 SP |
470 | result.data = patch_delta(base_obj->data, base_obj->size, |
471 | delta_data, delta_size, | |
472 | &result.size); | |
9cf6d335 | 473 | free(delta_data); |
f41aebd4 | 474 | if (!result.data) |
aa7e44bf | 475 | bad_object(delta_obj->idx.offset, "failed to apply delta"); |
f41aebd4 | 476 | sha1_object(result.data, result.size, type, delta_obj->idx.sha1); |
636171cb | 477 | nr_resolved_deltas++; |
53dda6ff | 478 | |
03993e13 | 479 | result.obj = delta_obj; |
4a438cab SP |
480 | link_base_data(base_obj, &result); |
481 | ||
aa7e44bf | 482 | hashcpy(delta_base.sha1, delta_obj->idx.sha1); |
b89c4e93 | 483 | if (!find_delta_children(&delta_base, &first, &last)) { |
636171cb NP |
484 | for (j = first; j <= last; j++) { |
485 | struct object_entry *child = objects + deltas[j].obj_no; | |
486 | if (child->real_type == OBJ_REF_DELTA) | |
f41aebd4 | 487 | resolve_delta(child, &result, type); |
636171cb | 488 | } |
53dda6ff NP |
489 | } |
490 | ||
491 | memset(&delta_base, 0, sizeof(delta_base)); | |
aa7e44bf | 492 | delta_base.offset = delta_obj->idx.offset; |
b89c4e93 | 493 | if (!find_delta_children(&delta_base, &first, &last)) { |
636171cb NP |
494 | for (j = first; j <= last; j++) { |
495 | struct object_entry *child = objects + deltas[j].obj_no; | |
496 | if (child->real_type == OBJ_OFS_DELTA) | |
f41aebd4 | 497 | resolve_delta(child, &result, type); |
636171cb | 498 | } |
9cf6d335 | 499 | } |
53dda6ff | 500 | |
4a438cab | 501 | unlink_base_data(&result); |
9cf6d335 SV |
502 | } |
503 | ||
504 | static int compare_delta_entry(const void *a, const void *b) | |
505 | { | |
506 | const struct delta_entry *delta_a = a; | |
507 | const struct delta_entry *delta_b = b; | |
3c552873 | 508 | return memcmp(&delta_a->base, &delta_b->base, UNION_BASE_SZ); |
9cf6d335 SV |
509 | } |
510 | ||
2d477051 NP |
511 | /* Parse all objects and return the pack content SHA1 hash */ |
512 | static void parse_pack_objects(unsigned char *sha1) | |
9cf6d335 | 513 | { |
96a02f8f | 514 | int i; |
53dda6ff | 515 | struct delta_entry *delta = deltas; |
2d477051 | 516 | struct stat st; |
9cf6d335 SV |
517 | |
518 | /* | |
519 | * First pass: | |
520 | * - find locations of all objects; | |
521 | * - calculate SHA1 of all non-delta objects; | |
b89c4e93 | 522 | * - remember base (SHA1 or offset) for all deltas. |
9cf6d335 | 523 | */ |
13aaf148 | 524 | if (verbose) |
29e63ed3 NP |
525 | progress = start_progress( |
526 | from_stdin ? "Receiving objects" : "Indexing objects", | |
527 | nr_objects); | |
9cf6d335 SV |
528 | for (i = 0; i < nr_objects; i++) { |
529 | struct object_entry *obj = &objects[i]; | |
f41aebd4 | 530 | void *data = unpack_raw_entry(obj, &delta->base); |
9cf6d335 | 531 | obj->real_type = obj->type; |
53dda6ff NP |
532 | if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) { |
533 | nr_deltas++; | |
636171cb | 534 | delta->obj_no = i; |
53dda6ff | 535 | delta++; |
9cf6d335 | 536 | } else |
aa7e44bf | 537 | sha1_object(data, obj->size, obj->type, obj->idx.sha1); |
9cf6d335 | 538 | free(data); |
4d4fcc54 | 539 | display_progress(progress, i+1); |
9cf6d335 | 540 | } |
aa7e44bf | 541 | objects[i].idx.offset = consumed_bytes; |
4d4fcc54 | 542 | stop_progress(&progress); |
2d477051 NP |
543 | |
544 | /* Check pack integrity */ | |
636171cb | 545 | flush(); |
2d477051 NP |
546 | SHA1_Final(sha1, &input_ctx); |
547 | if (hashcmp(fill(20), sha1)) | |
e42797f5 | 548 | die("pack is corrupted (SHA1 mismatch)"); |
9bee2478 | 549 | use(20); |
2d477051 NP |
550 | |
551 | /* If input_fd is a file, we should have reached its end now. */ | |
552 | if (fstat(input_fd, &st)) | |
e42797f5 | 553 | die("cannot fstat packfile: %s", strerror(errno)); |
fa257b05 JS |
554 | if (S_ISREG(st.st_mode) && |
555 | lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size) | |
e42797f5 | 556 | die("pack has junk at the end"); |
9cf6d335 | 557 | |
3c9af366 NP |
558 | if (!nr_deltas) |
559 | return; | |
560 | ||
53dda6ff | 561 | /* Sort deltas by base SHA1/offset for fast searching */ |
9cf6d335 SV |
562 | qsort(deltas, nr_deltas, sizeof(struct delta_entry), |
563 | compare_delta_entry); | |
564 | ||
565 | /* | |
566 | * Second pass: | |
567 | * - for all non-delta objects, look if it is used as a base for | |
568 | * deltas; | |
569 | * - if used as a base, uncompress the object and apply all deltas, | |
570 | * recursively checking if the resulting object is used as a base | |
571 | * for some more deltas. | |
572 | */ | |
13aaf148 | 573 | if (verbose) |
dc6a0757 | 574 | progress = start_progress("Resolving deltas", nr_deltas); |
9cf6d335 SV |
575 | for (i = 0; i < nr_objects; i++) { |
576 | struct object_entry *obj = &objects[i]; | |
53dda6ff NP |
577 | union delta_base base; |
578 | int j, ref, ref_first, ref_last, ofs, ofs_first, ofs_last; | |
f41aebd4 | 579 | struct base_data base_obj; |
9cf6d335 | 580 | |
53dda6ff | 581 | if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) |
9cf6d335 | 582 | continue; |
aa7e44bf | 583 | hashcpy(base.sha1, obj->idx.sha1); |
b89c4e93 | 584 | ref = !find_delta_children(&base, &ref_first, &ref_last); |
53dda6ff | 585 | memset(&base, 0, sizeof(base)); |
aa7e44bf | 586 | base.offset = obj->idx.offset; |
b89c4e93 | 587 | ofs = !find_delta_children(&base, &ofs_first, &ofs_last); |
53dda6ff | 588 | if (!ref && !ofs) |
9cf6d335 | 589 | continue; |
f41aebd4 SP |
590 | base_obj.data = get_data_from_pack(obj); |
591 | base_obj.size = obj->size; | |
03993e13 | 592 | base_obj.obj = obj; |
4a438cab | 593 | link_base_data(NULL, &base_obj); |
f41aebd4 | 594 | |
53dda6ff | 595 | if (ref) |
636171cb NP |
596 | for (j = ref_first; j <= ref_last; j++) { |
597 | struct object_entry *child = objects + deltas[j].obj_no; | |
598 | if (child->real_type == OBJ_REF_DELTA) | |
f41aebd4 | 599 | resolve_delta(child, &base_obj, obj->type); |
636171cb | 600 | } |
53dda6ff | 601 | if (ofs) |
636171cb NP |
602 | for (j = ofs_first; j <= ofs_last; j++) { |
603 | struct object_entry *child = objects + deltas[j].obj_no; | |
604 | if (child->real_type == OBJ_OFS_DELTA) | |
f41aebd4 | 605 | resolve_delta(child, &base_obj, obj->type); |
636171cb | 606 | } |
4a438cab | 607 | unlink_base_data(&base_obj); |
4d4fcc54 | 608 | display_progress(progress, nr_resolved_deltas); |
9cf6d335 | 609 | } |
636171cb NP |
610 | } |
611 | ||
ee5743ce | 612 | static int write_compressed(int fd, void *in, unsigned int size, uint32_t *obj_crc) |
636171cb NP |
613 | { |
614 | z_stream stream; | |
615 | unsigned long maxsize; | |
616 | void *out; | |
617 | ||
618 | memset(&stream, 0, sizeof(stream)); | |
619 | deflateInit(&stream, zlib_compression_level); | |
620 | maxsize = deflateBound(&stream, size); | |
621 | out = xmalloc(maxsize); | |
622 | ||
623 | /* Compress it */ | |
624 | stream.next_in = in; | |
625 | stream.avail_in = size; | |
626 | stream.next_out = out; | |
627 | stream.avail_out = maxsize; | |
628 | while (deflate(&stream, Z_FINISH) == Z_OK); | |
629 | deflateEnd(&stream); | |
630 | ||
631 | size = stream.total_out; | |
632 | write_or_die(fd, out, size); | |
ee5743ce | 633 | *obj_crc = crc32(*obj_crc, out, size); |
636171cb NP |
634 | free(out); |
635 | return size; | |
636 | } | |
637 | ||
03993e13 SP |
638 | static struct object_entry *append_obj_to_pack( |
639 | const unsigned char *sha1, void *buf, | |
636171cb NP |
640 | unsigned long size, enum object_type type) |
641 | { | |
642 | struct object_entry *obj = &objects[nr_objects++]; | |
643 | unsigned char header[10]; | |
644 | unsigned long s = size; | |
645 | int n = 0; | |
646 | unsigned char c = (type << 4) | (s & 15); | |
647 | s >>= 4; | |
648 | while (s) { | |
649 | header[n++] = c | 0x80; | |
650 | c = s & 0x7f; | |
651 | s >>= 7; | |
652 | } | |
653 | header[n++] = c; | |
654 | write_or_die(output_fd, header, n); | |
aa7e44bf GB |
655 | obj[0].idx.crc32 = crc32(0, Z_NULL, 0); |
656 | obj[0].idx.crc32 = crc32(obj[0].idx.crc32, header, n); | |
657 | obj[1].idx.offset = obj[0].idx.offset + n; | |
658 | obj[1].idx.offset += write_compressed(output_fd, buf, size, &obj[0].idx.crc32); | |
659 | hashcpy(obj->idx.sha1, sha1); | |
03993e13 | 660 | return obj; |
636171cb NP |
661 | } |
662 | ||
663 | static int delta_pos_compare(const void *_a, const void *_b) | |
664 | { | |
665 | struct delta_entry *a = *(struct delta_entry **)_a; | |
666 | struct delta_entry *b = *(struct delta_entry **)_b; | |
667 | return a->obj_no - b->obj_no; | |
668 | } | |
9cf6d335 | 669 | |
636171cb NP |
670 | static void fix_unresolved_deltas(int nr_unresolved) |
671 | { | |
672 | struct delta_entry **sorted_by_pos; | |
96a02f8f | 673 | int i, n = 0; |
636171cb NP |
674 | |
675 | /* | |
676 | * Since many unresolved deltas may well be themselves base objects | |
677 | * for more unresolved deltas, we really want to include the | |
678 | * smallest number of base objects that would cover as much delta | |
679 | * as possible by picking the | |
680 | * trunc deltas first, allowing for other deltas to resolve without | |
681 | * additional base objects. Since most base objects are to be found | |
682 | * before deltas depending on them, a good heuristic is to start | |
683 | * resolving deltas in the same order as their position in the pack. | |
684 | */ | |
685 | sorted_by_pos = xmalloc(nr_unresolved * sizeof(*sorted_by_pos)); | |
9cf6d335 | 686 | for (i = 0; i < nr_deltas; i++) { |
636171cb NP |
687 | if (objects[deltas[i].obj_no].real_type != OBJ_REF_DELTA) |
688 | continue; | |
689 | sorted_by_pos[n++] = &deltas[i]; | |
9cf6d335 | 690 | } |
636171cb NP |
691 | qsort(sorted_by_pos, n, sizeof(*sorted_by_pos), delta_pos_compare); |
692 | ||
693 | for (i = 0; i < n; i++) { | |
694 | struct delta_entry *d = sorted_by_pos[i]; | |
21666f1a | 695 | enum object_type type; |
636171cb | 696 | int j, first, last; |
f41aebd4 | 697 | struct base_data base_obj; |
636171cb NP |
698 | |
699 | if (objects[d->obj_no].real_type != OBJ_REF_DELTA) | |
700 | continue; | |
f41aebd4 SP |
701 | base_obj.data = read_sha1_file(d->base.sha1, &type, &base_obj.size); |
702 | if (!base_obj.data) | |
636171cb | 703 | continue; |
03993e13 SP |
704 | |
705 | if (check_sha1_signature(d->base.sha1, base_obj.data, | |
706 | base_obj.size, typename(type))) | |
707 | die("local object %s is corrupt", sha1_to_hex(d->base.sha1)); | |
708 | base_obj.obj = append_obj_to_pack(d->base.sha1, base_obj.data, | |
709 | base_obj.size, type); | |
4a438cab | 710 | link_base_data(NULL, &base_obj); |
636171cb | 711 | |
b89c4e93 | 712 | find_delta_children(&d->base, &first, &last); |
636171cb NP |
713 | for (j = first; j <= last; j++) { |
714 | struct object_entry *child = objects + deltas[j].obj_no; | |
715 | if (child->real_type == OBJ_REF_DELTA) | |
f41aebd4 | 716 | resolve_delta(child, &base_obj, type); |
636171cb NP |
717 | } |
718 | ||
4a438cab | 719 | unlink_base_data(&base_obj); |
4d4fcc54 | 720 | display_progress(progress, nr_resolved_deltas); |
636171cb NP |
721 | } |
722 | free(sorted_by_pos); | |
723 | } | |
724 | ||
e42797f5 NP |
725 | static void final(const char *final_pack_name, const char *curr_pack_name, |
726 | const char *final_index_name, const char *curr_index_name, | |
b8077709 | 727 | const char *keep_name, const char *keep_msg, |
e42797f5 NP |
728 | unsigned char *sha1) |
729 | { | |
3a55602e | 730 | const char *report = "pack"; |
e42797f5 NP |
731 | char name[PATH_MAX]; |
732 | int err; | |
733 | ||
734 | if (!from_stdin) { | |
735 | close(input_fd); | |
736 | } else { | |
4c81b03e | 737 | fsync_or_die(output_fd, curr_pack_name); |
e42797f5 NP |
738 | err = close(output_fd); |
739 | if (err) | |
740 | die("error while closing pack file: %s", strerror(errno)); | |
741 | chmod(curr_pack_name, 0444); | |
742 | } | |
743 | ||
b8077709 SP |
744 | if (keep_msg) { |
745 | int keep_fd, keep_msg_len = strlen(keep_msg); | |
746 | if (!keep_name) { | |
747 | snprintf(name, sizeof(name), "%s/pack/pack-%s.keep", | |
748 | get_object_directory(), sha1_to_hex(sha1)); | |
749 | keep_name = name; | |
750 | } | |
9ca4a201 NP |
751 | keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); |
752 | if (keep_fd < 0) { | |
753 | if (errno != EEXIST) | |
754 | die("cannot write keep file"); | |
755 | } else { | |
756 | if (keep_msg_len > 0) { | |
757 | write_or_die(keep_fd, keep_msg, keep_msg_len); | |
758 | write_or_die(keep_fd, "\n", 1); | |
759 | } | |
91c8d590 JM |
760 | if (close(keep_fd) != 0) |
761 | die("cannot write keep file"); | |
576162a4 | 762 | report = "keep"; |
b8077709 | 763 | } |
b8077709 SP |
764 | } |
765 | ||
e42797f5 NP |
766 | if (final_pack_name != curr_pack_name) { |
767 | if (!final_pack_name) { | |
768 | snprintf(name, sizeof(name), "%s/pack/pack-%s.pack", | |
769 | get_object_directory(), sha1_to_hex(sha1)); | |
770 | final_pack_name = name; | |
771 | } | |
772 | if (move_temp_to_file(curr_pack_name, final_pack_name)) | |
773 | die("cannot store pack file"); | |
774 | } | |
775 | ||
776 | chmod(curr_index_name, 0444); | |
777 | if (final_index_name != curr_index_name) { | |
778 | if (!final_index_name) { | |
779 | snprintf(name, sizeof(name), "%s/pack/pack-%s.idx", | |
780 | get_object_directory(), sha1_to_hex(sha1)); | |
781 | final_index_name = name; | |
782 | } | |
783 | if (move_temp_to_file(curr_index_name, final_index_name)) | |
784 | die("cannot store index file"); | |
785 | } | |
576162a4 NP |
786 | |
787 | if (!from_stdin) { | |
788 | printf("%s\n", sha1_to_hex(sha1)); | |
789 | } else { | |
790 | char buf[48]; | |
791 | int len = snprintf(buf, sizeof(buf), "%s\t%s\n", | |
792 | report, sha1_to_hex(sha1)); | |
d1b2ddc8 | 793 | write_or_die(1, buf, len); |
576162a4 NP |
794 | |
795 | /* | |
796 | * Let's just mimic git-unpack-objects here and write | |
797 | * the last part of the input buffer to stdout. | |
798 | */ | |
799 | while (input_len) { | |
800 | err = xwrite(1, input_buffer + input_offset, input_len); | |
801 | if (err <= 0) | |
802 | break; | |
803 | input_len -= err; | |
804 | input_offset += err; | |
805 | } | |
806 | } | |
9cf6d335 SV |
807 | } |
808 | ||
ef90d6d4 | 809 | static int git_index_pack_config(const char *k, const char *v, void *cb) |
4d00bda2 NP |
810 | { |
811 | if (!strcmp(k, "pack.indexversion")) { | |
812 | pack_idx_default_version = git_config_int(k, v); | |
813 | if (pack_idx_default_version > 2) | |
814 | die("bad pack.indexversion=%d", pack_idx_default_version); | |
815 | return 0; | |
816 | } | |
ef90d6d4 | 817 | return git_default_config(k, v, cb); |
4d00bda2 NP |
818 | } |
819 | ||
9cf6d335 SV |
820 | int main(int argc, char **argv) |
821 | { | |
636171cb | 822 | int i, fix_thin_pack = 0; |
4049b9cf NP |
823 | char *curr_pack, *pack_name = NULL; |
824 | char *curr_index, *index_name = NULL; | |
b8077709 SP |
825 | const char *keep_name = NULL, *keep_msg = NULL; |
826 | char *index_name_buf = NULL, *keep_name_buf = NULL; | |
aa7e44bf | 827 | struct pack_idx_entry **idx_objects; |
84c8d8ae | 828 | unsigned char sha1[20]; |
9cf6d335 | 829 | |
ef90d6d4 | 830 | git_config(git_index_pack_config, NULL); |
4d00bda2 | 831 | |
9cf6d335 | 832 | for (i = 1; i < argc; i++) { |
4049b9cf | 833 | char *arg = argv[i]; |
9cf6d335 SV |
834 | |
835 | if (*arg == '-') { | |
e42797f5 NP |
836 | if (!strcmp(arg, "--stdin")) { |
837 | from_stdin = 1; | |
636171cb NP |
838 | } else if (!strcmp(arg, "--fix-thin")) { |
839 | fix_thin_pack = 1; | |
0153be05 MK |
840 | } else if (!strcmp(arg, "--strict")) { |
841 | strict = 1; | |
b8077709 SP |
842 | } else if (!strcmp(arg, "--keep")) { |
843 | keep_msg = ""; | |
cc44c765 | 844 | } else if (!prefixcmp(arg, "--keep=")) { |
b8077709 | 845 | keep_msg = arg + 7; |
cc44c765 | 846 | } else if (!prefixcmp(arg, "--pack_header=")) { |
bed006fb NP |
847 | struct pack_header *hdr; |
848 | char *c; | |
849 | ||
850 | hdr = (struct pack_header *)input_buffer; | |
851 | hdr->hdr_signature = htonl(PACK_SIGNATURE); | |
852 | hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10)); | |
853 | if (*c != ',') | |
854 | die("bad %s", arg); | |
855 | hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10)); | |
856 | if (*c) | |
857 | die("bad %s", arg); | |
858 | input_len = sizeof(*hdr); | |
3c9af366 NP |
859 | } else if (!strcmp(arg, "-v")) { |
860 | verbose = 1; | |
e42797f5 | 861 | } else if (!strcmp(arg, "-o")) { |
9cf6d335 SV |
862 | if (index_name || (i+1) >= argc) |
863 | usage(index_pack_usage); | |
864 | index_name = argv[++i]; | |
4ba7d711 NP |
865 | } else if (!prefixcmp(arg, "--index-version=")) { |
866 | char *c; | |
aa7e44bf GB |
867 | pack_idx_default_version = strtoul(arg + 16, &c, 10); |
868 | if (pack_idx_default_version > 2) | |
4ba7d711 NP |
869 | die("bad %s", arg); |
870 | if (*c == ',') | |
aa7e44bf GB |
871 | pack_idx_off32_limit = strtoul(c+1, &c, 0); |
872 | if (*c || pack_idx_off32_limit & 0x80000000) | |
4ba7d711 | 873 | die("bad %s", arg); |
9cf6d335 SV |
874 | } else |
875 | usage(index_pack_usage); | |
876 | continue; | |
877 | } | |
878 | ||
879 | if (pack_name) | |
880 | usage(index_pack_usage); | |
881 | pack_name = arg; | |
882 | } | |
883 | ||
e42797f5 | 884 | if (!pack_name && !from_stdin) |
9cf6d335 | 885 | usage(index_pack_usage); |
636171cb NP |
886 | if (fix_thin_pack && !from_stdin) |
887 | die("--fix-thin cannot be used without --stdin"); | |
e42797f5 | 888 | if (!index_name && pack_name) { |
9cf6d335 | 889 | int len = strlen(pack_name); |
5bb1cda5 | 890 | if (!has_extension(pack_name, ".pack")) |
9cf6d335 SV |
891 | die("packfile name '%s' does not end with '.pack'", |
892 | pack_name); | |
6689f087 | 893 | index_name_buf = xmalloc(len); |
9cf6d335 SV |
894 | memcpy(index_name_buf, pack_name, len - 5); |
895 | strcpy(index_name_buf + len - 5, ".idx"); | |
896 | index_name = index_name_buf; | |
897 | } | |
b8077709 SP |
898 | if (keep_msg && !keep_name && pack_name) { |
899 | int len = strlen(pack_name); | |
900 | if (!has_extension(pack_name, ".pack")) | |
901 | die("packfile name '%s' does not end with '.pack'", | |
902 | pack_name); | |
903 | keep_name_buf = xmalloc(len); | |
904 | memcpy(keep_name_buf, pack_name, len - 5); | |
905 | strcpy(keep_name_buf + len - 5, ".keep"); | |
906 | keep_name = keep_name_buf; | |
907 | } | |
9cf6d335 | 908 | |
e42797f5 | 909 | curr_pack = open_pack_file(pack_name); |
9cf6d335 | 910 | parse_pack_header(); |
636171cb NP |
911 | objects = xmalloc((nr_objects + 1) * sizeof(struct object_entry)); |
912 | deltas = xmalloc(nr_objects * sizeof(struct delta_entry)); | |
2d477051 | 913 | parse_pack_objects(sha1); |
96a02f8f | 914 | if (nr_deltas == nr_resolved_deltas) { |
4d4fcc54 | 915 | stop_progress(&progress); |
96a02f8f NP |
916 | /* Flush remaining pack final 20-byte SHA1. */ |
917 | flush(); | |
918 | } else { | |
636171cb | 919 | if (fix_thin_pack) { |
a984a06a | 920 | char msg[48]; |
636171cb | 921 | int nr_unresolved = nr_deltas - nr_resolved_deltas; |
3c9af366 | 922 | int nr_objects_initial = nr_objects; |
636171cb NP |
923 | if (nr_unresolved <= 0) |
924 | die("confusion beyond insanity"); | |
925 | objects = xrealloc(objects, | |
926 | (nr_objects + nr_unresolved + 1) | |
927 | * sizeof(*objects)); | |
928 | fix_unresolved_deltas(nr_unresolved); | |
a984a06a NP |
929 | sprintf(msg, "completed with %d local objects", |
930 | nr_objects - nr_objects_initial); | |
931 | stop_progress_msg(&progress, msg); | |
cbc6bdab | 932 | fixup_pack_header_footer(output_fd, sha1, |
a984a06a | 933 | curr_pack, nr_objects); |
636171cb NP |
934 | } |
935 | if (nr_deltas != nr_resolved_deltas) | |
936 | die("pack has %d unresolved deltas", | |
937 | nr_deltas - nr_resolved_deltas); | |
636171cb | 938 | } |
9cf6d335 | 939 | free(deltas); |
0153be05 MK |
940 | if (strict) |
941 | check_objects(); | |
aa7e44bf GB |
942 | |
943 | idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *)); | |
944 | for (i = 0; i < nr_objects; i++) | |
945 | idx_objects[i] = &objects[i].idx; | |
946 | curr_index = write_idx_file(index_name, idx_objects, nr_objects, sha1); | |
947 | free(idx_objects); | |
948 | ||
b8077709 SP |
949 | final(pack_name, curr_pack, |
950 | index_name, curr_index, | |
951 | keep_name, keep_msg, | |
952 | sha1); | |
9cf6d335 SV |
953 | free(objects); |
954 | free(index_name_buf); | |
b8077709 | 955 | free(keep_name_buf); |
c85228ed NP |
956 | if (pack_name == NULL) |
957 | free(curr_pack); | |
958 | if (index_name == NULL) | |
959 | free(curr_index); | |
9cf6d335 SV |
960 | |
961 | return 0; | |
962 | } |