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Commit | Line | Data |
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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" | |
9cf6d335 SV |
9 | |
10 | static const char index_pack_usage[] = | |
11 | "git-index-pack [-o index-file] pack-file"; | |
12 | ||
13 | struct object_entry | |
14 | { | |
15 | unsigned long offset; | |
2d477051 NP |
16 | unsigned long size; |
17 | unsigned int hdr_size; | |
9cf6d335 SV |
18 | enum object_type type; |
19 | enum object_type real_type; | |
20 | unsigned char sha1[20]; | |
21 | }; | |
22 | ||
53dda6ff NP |
23 | union delta_base { |
24 | unsigned char sha1[20]; | |
25 | unsigned long offset; | |
26 | }; | |
27 | ||
3c552873 NP |
28 | /* |
29 | * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want | |
30 | * to memcmp() only the first 20 bytes. | |
31 | */ | |
32 | #define UNION_BASE_SZ 20 | |
33 | ||
9cf6d335 SV |
34 | struct delta_entry |
35 | { | |
36 | struct object_entry *obj; | |
53dda6ff | 37 | union delta_base base; |
9cf6d335 SV |
38 | }; |
39 | ||
40 | static const char *pack_name; | |
9cf6d335 SV |
41 | static struct object_entry *objects; |
42 | static struct delta_entry *deltas; | |
43 | static int nr_objects; | |
44 | static int nr_deltas; | |
45 | ||
2d477051 NP |
46 | /* We always read in 4kB chunks. */ |
47 | static unsigned char input_buffer[4096]; | |
48 | static unsigned long input_offset, input_len, consumed_bytes; | |
49 | static SHA_CTX input_ctx; | |
50 | static int input_fd; | |
51 | ||
52 | /* | |
53 | * Make sure at least "min" bytes are available in the buffer, and | |
54 | * return the pointer to the buffer. | |
55 | */ | |
79a65697 | 56 | static void *fill(int min) |
9cf6d335 | 57 | { |
2d477051 NP |
58 | if (min <= input_len) |
59 | return input_buffer + input_offset; | |
60 | if (min > sizeof(input_buffer)) | |
61 | die("cannot fill %d bytes", min); | |
62 | if (input_offset) { | |
63 | SHA1_Update(&input_ctx, input_buffer, input_offset); | |
79a65697 | 64 | memmove(input_buffer, input_buffer + input_offset, input_len); |
2d477051 NP |
65 | input_offset = 0; |
66 | } | |
67 | do { | |
68 | int ret = xread(input_fd, input_buffer + input_len, | |
69 | sizeof(input_buffer) - input_len); | |
70 | if (ret <= 0) { | |
71 | if (!ret) | |
72 | die("early EOF"); | |
73 | die("read error on input: %s", strerror(errno)); | |
74 | } | |
75 | input_len += ret; | |
76 | } while (input_len < min); | |
77 | return input_buffer; | |
78 | } | |
79 | ||
80 | static void use(int bytes) | |
81 | { | |
82 | if (bytes > input_len) | |
83 | die("used more bytes than were available"); | |
84 | input_len -= bytes; | |
85 | input_offset += bytes; | |
86 | consumed_bytes += bytes; | |
87 | } | |
9cf6d335 | 88 | |
2d477051 NP |
89 | static void open_pack_file(void) |
90 | { | |
91 | input_fd = open(pack_name, O_RDONLY); | |
92 | if (input_fd < 0) | |
9cf6d335 SV |
93 | die("cannot open packfile '%s': %s", pack_name, |
94 | strerror(errno)); | |
2d477051 | 95 | SHA1_Init(&input_ctx); |
9cf6d335 SV |
96 | } |
97 | ||
98 | static void parse_pack_header(void) | |
99 | { | |
2d477051 | 100 | struct pack_header *hdr = fill(sizeof(struct pack_header)); |
9cf6d335 SV |
101 | |
102 | /* Header consistency check */ | |
9cf6d335 SV |
103 | if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) |
104 | die("packfile '%s' signature mismatch", pack_name); | |
d60fc1c8 NP |
105 | if (!pack_version_ok(hdr->hdr_version)) |
106 | die("packfile '%s' version %d unsupported", | |
107 | pack_name, ntohl(hdr->hdr_version)); | |
9cf6d335 SV |
108 | |
109 | nr_objects = ntohl(hdr->hdr_entries); | |
2d477051 NP |
110 | use(sizeof(struct pack_header)); |
111 | /*fprintf(stderr, "Indexing %d objects\n", nr_objects);*/ | |
9cf6d335 SV |
112 | } |
113 | ||
114 | static void bad_object(unsigned long offset, const char *format, | |
115 | ...) NORETURN __attribute__((format (printf, 2, 3))); | |
116 | ||
117 | static void bad_object(unsigned long offset, const char *format, ...) | |
118 | { | |
119 | va_list params; | |
120 | char buf[1024]; | |
121 | ||
122 | va_start(params, format); | |
123 | vsnprintf(buf, sizeof(buf), format, params); | |
124 | va_end(params); | |
125 | die("packfile '%s': bad object at offset %lu: %s", | |
126 | pack_name, offset, buf); | |
127 | } | |
128 | ||
2d477051 | 129 | static void *unpack_entry_data(unsigned long offset, unsigned long size) |
9cf6d335 | 130 | { |
9cf6d335 SV |
131 | z_stream stream; |
132 | void *buf = xmalloc(size); | |
133 | ||
134 | memset(&stream, 0, sizeof(stream)); | |
135 | stream.next_out = buf; | |
136 | stream.avail_out = size; | |
2d477051 NP |
137 | stream.next_in = fill(1); |
138 | stream.avail_in = input_len; | |
9cf6d335 SV |
139 | inflateInit(&stream); |
140 | ||
141 | for (;;) { | |
142 | int ret = inflate(&stream, 0); | |
2d477051 NP |
143 | use(input_len - stream.avail_in); |
144 | if (stream.total_out == size && ret == Z_STREAM_END) | |
9cf6d335 SV |
145 | break; |
146 | if (ret != Z_OK) | |
147 | bad_object(offset, "inflate returned %d", ret); | |
2d477051 NP |
148 | stream.next_in = fill(1); |
149 | stream.avail_in = input_len; | |
9cf6d335 SV |
150 | } |
151 | inflateEnd(&stream); | |
9cf6d335 SV |
152 | return buf; |
153 | } | |
154 | ||
2d477051 | 155 | static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base) |
9cf6d335 | 156 | { |
2d477051 | 157 | unsigned char *p, c; |
53dda6ff | 158 | unsigned long size, base_offset; |
9cf6d335 | 159 | unsigned shift; |
9cf6d335 | 160 | |
2d477051 NP |
161 | obj->offset = consumed_bytes; |
162 | ||
163 | p = fill(1); | |
164 | c = *p; | |
165 | use(1); | |
166 | obj->type = (c >> 4) & 7; | |
9cf6d335 SV |
167 | size = (c & 15); |
168 | shift = 4; | |
169 | while (c & 0x80) { | |
2d477051 NP |
170 | p = fill(1); |
171 | c = *p; | |
172 | use(1); | |
9cf6d335 SV |
173 | size += (c & 0x7fUL) << shift; |
174 | shift += 7; | |
175 | } | |
2d477051 | 176 | obj->size = size; |
9cf6d335 | 177 | |
2d477051 | 178 | switch (obj->type) { |
eb32d236 | 179 | case OBJ_REF_DELTA: |
2d477051 NP |
180 | hashcpy(delta_base->sha1, fill(20)); |
181 | use(20); | |
53dda6ff NP |
182 | break; |
183 | case OBJ_OFS_DELTA: | |
184 | memset(delta_base, 0, sizeof(*delta_base)); | |
2d477051 NP |
185 | p = fill(1); |
186 | c = *p; | |
187 | use(1); | |
53dda6ff NP |
188 | base_offset = c & 127; |
189 | while (c & 128) { | |
190 | base_offset += 1; | |
191 | if (!base_offset || base_offset & ~(~0UL >> 7)) | |
2d477051 NP |
192 | bad_object(obj->offset, "offset value overflow for delta base object"); |
193 | p = fill(1); | |
194 | c = *p; | |
195 | use(1); | |
53dda6ff NP |
196 | base_offset = (base_offset << 7) + (c & 127); |
197 | } | |
2d477051 NP |
198 | delta_base->offset = obj->offset - base_offset; |
199 | if (delta_base->offset >= obj->offset) | |
200 | bad_object(obj->offset, "delta base offset is out of bound"); | |
53dda6ff | 201 | break; |
9cf6d335 SV |
202 | case OBJ_COMMIT: |
203 | case OBJ_TREE: | |
204 | case OBJ_BLOB: | |
205 | case OBJ_TAG: | |
9cf6d335 SV |
206 | break; |
207 | default: | |
2d477051 | 208 | bad_object(obj->offset, "bad object type %d", obj->type); |
9cf6d335 | 209 | } |
2d477051 NP |
210 | obj->hdr_size = consumed_bytes - obj->offset; |
211 | ||
212 | return unpack_entry_data(obj->offset, obj->size); | |
213 | } | |
214 | ||
215 | static void * get_data_from_pack(struct object_entry *obj) | |
216 | { | |
217 | unsigned long from = obj[0].offset + obj[0].hdr_size; | |
218 | unsigned long len = obj[1].offset - from; | |
219 | unsigned pg_offset = from % getpagesize(); | |
220 | unsigned char *map, *data; | |
221 | z_stream stream; | |
222 | int st; | |
9cf6d335 | 223 | |
2d477051 NP |
224 | map = mmap(NULL, len + pg_offset, PROT_READ, MAP_PRIVATE, |
225 | input_fd, from - pg_offset); | |
226 | if (map == MAP_FAILED) | |
227 | die("cannot mmap packfile '%s': %s", pack_name, strerror(errno)); | |
228 | data = xmalloc(obj->size); | |
229 | memset(&stream, 0, sizeof(stream)); | |
230 | stream.next_out = data; | |
231 | stream.avail_out = obj->size; | |
232 | stream.next_in = map + pg_offset; | |
233 | stream.avail_in = len; | |
234 | inflateInit(&stream); | |
235 | while ((st = inflate(&stream, Z_FINISH)) == Z_OK); | |
236 | inflateEnd(&stream); | |
237 | if (st != Z_STREAM_END || stream.total_out != obj->size) | |
238 | die("serious inflate inconsistency"); | |
239 | munmap(map, len + pg_offset); | |
9cf6d335 SV |
240 | return data; |
241 | } | |
242 | ||
53dda6ff | 243 | static int find_delta(const union delta_base *base) |
9cf6d335 SV |
244 | { |
245 | int first = 0, last = nr_deltas; | |
246 | ||
247 | while (first < last) { | |
248 | int next = (first + last) / 2; | |
249 | struct delta_entry *delta = &deltas[next]; | |
250 | int cmp; | |
251 | ||
3c552873 | 252 | cmp = memcmp(base, &delta->base, UNION_BASE_SZ); |
9cf6d335 SV |
253 | if (!cmp) |
254 | return next; | |
255 | if (cmp < 0) { | |
256 | last = next; | |
257 | continue; | |
258 | } | |
259 | first = next+1; | |
260 | } | |
261 | return -first-1; | |
262 | } | |
263 | ||
53dda6ff NP |
264 | static int find_delta_childs(const union delta_base *base, |
265 | int *first_index, int *last_index) | |
9cf6d335 | 266 | { |
53dda6ff | 267 | int first = find_delta(base); |
9cf6d335 SV |
268 | int last = first; |
269 | int end = nr_deltas - 1; | |
270 | ||
271 | if (first < 0) | |
272 | return -1; | |
3c552873 | 273 | while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ)) |
9cf6d335 | 274 | --first; |
3c552873 | 275 | while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ)) |
9cf6d335 SV |
276 | ++last; |
277 | *first_index = first; | |
278 | *last_index = last; | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static void sha1_object(const void *data, unsigned long size, | |
283 | enum object_type type, unsigned char *sha1) | |
284 | { | |
285 | SHA_CTX ctx; | |
286 | char header[50]; | |
287 | int header_size; | |
288 | const char *type_str; | |
289 | ||
290 | switch (type) { | |
8e440259 PE |
291 | case OBJ_COMMIT: type_str = commit_type; break; |
292 | case OBJ_TREE: type_str = tree_type; break; | |
293 | case OBJ_BLOB: type_str = blob_type; break; | |
294 | case OBJ_TAG: type_str = tag_type; break; | |
9cf6d335 SV |
295 | default: |
296 | die("bad type %d", type); | |
297 | } | |
298 | ||
299 | header_size = sprintf(header, "%s %lu", type_str, size) + 1; | |
300 | ||
301 | SHA1_Init(&ctx); | |
302 | SHA1_Update(&ctx, header, header_size); | |
303 | SHA1_Update(&ctx, data, size); | |
304 | SHA1_Final(sha1, &ctx); | |
305 | } | |
306 | ||
307 | static void resolve_delta(struct delta_entry *delta, void *base_data, | |
308 | unsigned long base_size, enum object_type type) | |
309 | { | |
310 | struct object_entry *obj = delta->obj; | |
311 | void *delta_data; | |
312 | unsigned long delta_size; | |
313 | void *result; | |
314 | unsigned long result_size; | |
53dda6ff | 315 | union delta_base delta_base; |
9cf6d335 SV |
316 | int j, first, last; |
317 | ||
318 | obj->real_type = type; | |
2d477051 NP |
319 | delta_data = get_data_from_pack(obj); |
320 | delta_size = obj->size; | |
9cf6d335 SV |
321 | result = patch_delta(base_data, base_size, delta_data, delta_size, |
322 | &result_size); | |
323 | free(delta_data); | |
324 | if (!result) | |
325 | bad_object(obj->offset, "failed to apply delta"); | |
326 | sha1_object(result, result_size, type, obj->sha1); | |
53dda6ff NP |
327 | |
328 | hashcpy(delta_base.sha1, obj->sha1); | |
329 | if (!find_delta_childs(&delta_base, &first, &last)) { | |
330 | for (j = first; j <= last; j++) | |
331 | if (deltas[j].obj->type == OBJ_REF_DELTA) | |
332 | resolve_delta(&deltas[j], result, result_size, type); | |
333 | } | |
334 | ||
335 | memset(&delta_base, 0, sizeof(delta_base)); | |
336 | delta_base.offset = obj->offset; | |
337 | if (!find_delta_childs(&delta_base, &first, &last)) { | |
9cf6d335 | 338 | for (j = first; j <= last; j++) |
53dda6ff NP |
339 | if (deltas[j].obj->type == OBJ_OFS_DELTA) |
340 | resolve_delta(&deltas[j], result, result_size, type); | |
9cf6d335 | 341 | } |
53dda6ff | 342 | |
9cf6d335 SV |
343 | free(result); |
344 | } | |
345 | ||
346 | static int compare_delta_entry(const void *a, const void *b) | |
347 | { | |
348 | const struct delta_entry *delta_a = a; | |
349 | const struct delta_entry *delta_b = b; | |
3c552873 | 350 | return memcmp(&delta_a->base, &delta_b->base, UNION_BASE_SZ); |
9cf6d335 SV |
351 | } |
352 | ||
2d477051 NP |
353 | /* Parse all objects and return the pack content SHA1 hash */ |
354 | static void parse_pack_objects(unsigned char *sha1) | |
9cf6d335 SV |
355 | { |
356 | int i; | |
53dda6ff | 357 | struct delta_entry *delta = deltas; |
9cf6d335 | 358 | void *data; |
2d477051 | 359 | struct stat st; |
9cf6d335 SV |
360 | |
361 | /* | |
362 | * First pass: | |
363 | * - find locations of all objects; | |
364 | * - calculate SHA1 of all non-delta objects; | |
365 | * - remember base SHA1 for all deltas. | |
366 | */ | |
367 | for (i = 0; i < nr_objects; i++) { | |
368 | struct object_entry *obj = &objects[i]; | |
2d477051 | 369 | data = unpack_raw_entry(obj, &delta->base); |
9cf6d335 | 370 | obj->real_type = obj->type; |
53dda6ff NP |
371 | if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) { |
372 | nr_deltas++; | |
9cf6d335 | 373 | delta->obj = obj; |
53dda6ff | 374 | delta++; |
9cf6d335 | 375 | } else |
2d477051 | 376 | sha1_object(data, obj->size, obj->type, obj->sha1); |
9cf6d335 SV |
377 | free(data); |
378 | } | |
2d477051 NP |
379 | objects[i].offset = consumed_bytes; |
380 | ||
381 | /* Check pack integrity */ | |
382 | SHA1_Update(&input_ctx, input_buffer, input_offset); | |
383 | SHA1_Final(sha1, &input_ctx); | |
384 | if (hashcmp(fill(20), sha1)) | |
385 | die("packfile '%s' SHA1 mismatch", pack_name); | |
386 | use(20); | |
387 | ||
388 | /* If input_fd is a file, we should have reached its end now. */ | |
389 | if (fstat(input_fd, &st)) | |
390 | die("cannot fstat packfile '%s': %s", pack_name, strerror(errno)); | |
391 | if (S_ISREG(st.st_mode) && st.st_size != consumed_bytes) | |
9cf6d335 SV |
392 | die("packfile '%s' has junk at the end", pack_name); |
393 | ||
53dda6ff | 394 | /* Sort deltas by base SHA1/offset for fast searching */ |
9cf6d335 SV |
395 | qsort(deltas, nr_deltas, sizeof(struct delta_entry), |
396 | compare_delta_entry); | |
397 | ||
398 | /* | |
399 | * Second pass: | |
400 | * - for all non-delta objects, look if it is used as a base for | |
401 | * deltas; | |
402 | * - if used as a base, uncompress the object and apply all deltas, | |
403 | * recursively checking if the resulting object is used as a base | |
404 | * for some more deltas. | |
405 | */ | |
406 | for (i = 0; i < nr_objects; i++) { | |
407 | struct object_entry *obj = &objects[i]; | |
53dda6ff NP |
408 | union delta_base base; |
409 | int j, ref, ref_first, ref_last, ofs, ofs_first, ofs_last; | |
9cf6d335 | 410 | |
53dda6ff | 411 | if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) |
9cf6d335 | 412 | continue; |
53dda6ff NP |
413 | hashcpy(base.sha1, obj->sha1); |
414 | ref = !find_delta_childs(&base, &ref_first, &ref_last); | |
415 | memset(&base, 0, sizeof(base)); | |
416 | base.offset = obj->offset; | |
417 | ofs = !find_delta_childs(&base, &ofs_first, &ofs_last); | |
418 | if (!ref && !ofs) | |
9cf6d335 | 419 | continue; |
2d477051 | 420 | data = get_data_from_pack(obj); |
53dda6ff NP |
421 | if (ref) |
422 | for (j = ref_first; j <= ref_last; j++) | |
423 | if (deltas[j].obj->type == OBJ_REF_DELTA) | |
424 | resolve_delta(&deltas[j], data, | |
2d477051 | 425 | obj->size, obj->type); |
53dda6ff NP |
426 | if (ofs) |
427 | for (j = ofs_first; j <= ofs_last; j++) | |
428 | if (deltas[j].obj->type == OBJ_OFS_DELTA) | |
429 | resolve_delta(&deltas[j], data, | |
2d477051 | 430 | obj->size, obj->type); |
9cf6d335 SV |
431 | free(data); |
432 | } | |
433 | ||
434 | /* Check for unresolved deltas */ | |
435 | for (i = 0; i < nr_deltas; i++) { | |
53dda6ff NP |
436 | if (deltas[i].obj->real_type == OBJ_REF_DELTA || |
437 | deltas[i].obj->real_type == OBJ_OFS_DELTA) | |
9cf6d335 SV |
438 | die("packfile '%s' has unresolved deltas", pack_name); |
439 | } | |
440 | } | |
441 | ||
442 | static int sha1_compare(const void *_a, const void *_b) | |
443 | { | |
444 | struct object_entry *a = *(struct object_entry **)_a; | |
445 | struct object_entry *b = *(struct object_entry **)_b; | |
a89fccd2 | 446 | return hashcmp(a->sha1, b->sha1); |
9cf6d335 SV |
447 | } |
448 | ||
2d477051 NP |
449 | /* |
450 | * On entry *sha1 contains the pack content SHA1 hash, on exit it is | |
451 | * the SHA1 hash of sorted object names. | |
452 | */ | |
84c8d8ae | 453 | static void write_index_file(const char *index_name, unsigned char *sha1) |
9cf6d335 SV |
454 | { |
455 | struct sha1file *f; | |
7e4a2a84 | 456 | struct object_entry **sorted_by_sha, **list, **last; |
9cf6d335 SV |
457 | unsigned int array[256]; |
458 | int i; | |
84c8d8ae | 459 | SHA_CTX ctx; |
9cf6d335 | 460 | |
7e4a2a84 JH |
461 | if (nr_objects) { |
462 | sorted_by_sha = | |
463 | xcalloc(nr_objects, sizeof(struct object_entry *)); | |
464 | list = sorted_by_sha; | |
465 | last = sorted_by_sha + nr_objects; | |
466 | for (i = 0; i < nr_objects; ++i) | |
467 | sorted_by_sha[i] = &objects[i]; | |
468 | qsort(sorted_by_sha, nr_objects, sizeof(sorted_by_sha[0]), | |
469 | sha1_compare); | |
470 | ||
471 | } | |
472 | else | |
473 | sorted_by_sha = list = last = NULL; | |
9cf6d335 SV |
474 | |
475 | unlink(index_name); | |
476 | f = sha1create("%s", index_name); | |
477 | ||
478 | /* | |
479 | * Write the first-level table (the list is sorted, | |
480 | * but we use a 256-entry lookup to be able to avoid | |
481 | * having to do eight extra binary search iterations). | |
482 | */ | |
483 | for (i = 0; i < 256; i++) { | |
484 | struct object_entry **next = list; | |
485 | while (next < last) { | |
486 | struct object_entry *obj = *next; | |
487 | if (obj->sha1[0] != i) | |
488 | break; | |
489 | next++; | |
490 | } | |
491 | array[i] = htonl(next - sorted_by_sha); | |
492 | list = next; | |
493 | } | |
494 | sha1write(f, array, 256 * sizeof(int)); | |
495 | ||
84c8d8ae JH |
496 | /* recompute the SHA1 hash of sorted object names. |
497 | * currently pack-objects does not do this, but that | |
498 | * can be fixed. | |
499 | */ | |
500 | SHA1_Init(&ctx); | |
9cf6d335 SV |
501 | /* |
502 | * Write the actual SHA1 entries.. | |
503 | */ | |
504 | list = sorted_by_sha; | |
505 | for (i = 0; i < nr_objects; i++) { | |
506 | struct object_entry *obj = *list++; | |
507 | unsigned int offset = htonl(obj->offset); | |
508 | sha1write(f, &offset, 4); | |
509 | sha1write(f, obj->sha1, 20); | |
84c8d8ae | 510 | SHA1_Update(&ctx, obj->sha1, 20); |
9cf6d335 | 511 | } |
2d477051 | 512 | sha1write(f, sha1, 20); |
9cf6d335 SV |
513 | sha1close(f, NULL, 1); |
514 | free(sorted_by_sha); | |
84c8d8ae | 515 | SHA1_Final(sha1, &ctx); |
9cf6d335 SV |
516 | } |
517 | ||
518 | int main(int argc, char **argv) | |
519 | { | |
520 | int i; | |
521 | char *index_name = NULL; | |
522 | char *index_name_buf = NULL; | |
84c8d8ae | 523 | unsigned char sha1[20]; |
9cf6d335 SV |
524 | |
525 | for (i = 1; i < argc; i++) { | |
526 | const char *arg = argv[i]; | |
527 | ||
528 | if (*arg == '-') { | |
529 | if (!strcmp(arg, "-o")) { | |
530 | if (index_name || (i+1) >= argc) | |
531 | usage(index_pack_usage); | |
532 | index_name = argv[++i]; | |
533 | } else | |
534 | usage(index_pack_usage); | |
535 | continue; | |
536 | } | |
537 | ||
538 | if (pack_name) | |
539 | usage(index_pack_usage); | |
540 | pack_name = arg; | |
541 | } | |
542 | ||
543 | if (!pack_name) | |
544 | usage(index_pack_usage); | |
545 | if (!index_name) { | |
546 | int len = strlen(pack_name); | |
5bb1cda5 | 547 | if (!has_extension(pack_name, ".pack")) |
9cf6d335 SV |
548 | die("packfile name '%s' does not end with '.pack'", |
549 | pack_name); | |
6689f087 | 550 | index_name_buf = xmalloc(len); |
9cf6d335 SV |
551 | memcpy(index_name_buf, pack_name, len - 5); |
552 | strcpy(index_name_buf + len - 5, ".idx"); | |
553 | index_name = index_name_buf; | |
554 | } | |
555 | ||
556 | open_pack_file(); | |
557 | parse_pack_header(); | |
2d477051 | 558 | objects = xcalloc(nr_objects + 1, sizeof(struct object_entry)); |
9cf6d335 | 559 | deltas = xcalloc(nr_objects, sizeof(struct delta_entry)); |
2d477051 | 560 | parse_pack_objects(sha1); |
9cf6d335 | 561 | free(deltas); |
84c8d8ae | 562 | write_index_file(index_name, sha1); |
9cf6d335 SV |
563 | free(objects); |
564 | free(index_name_buf); | |
565 | ||
84c8d8ae JH |
566 | printf("%s\n", sha1_to_hex(sha1)); |
567 | ||
9cf6d335 SV |
568 | return 0; |
569 | } |