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Commit | Line | Data |
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5579f44d | 1 | #include "git-compat-util.h" |
32a8f510 | 2 | #include "environment.h" |
f394e093 | 3 | #include "gettext.h" |
41771fa4 | 4 | #include "hex.h" |
8b0eca7c | 5 | #include "pack.h" |
aa7e44bf | 6 | #include "csum-file.h" |
33add2ad | 7 | #include "remote.h" |
d9fef9d9 | 8 | #include "chunk-format.h" |
5dfaf49a TB |
9 | #include "pack-mtimes.h" |
10 | #include "oidmap.h" | |
5dfaf49a | 11 | #include "pack-objects.h" |
75f273d9 | 12 | #include "pack-revindex.h" |
c339932b | 13 | #include "path.h" |
a034e910 | 14 | #include "strbuf.h" |
aa7e44bf | 15 | |
ebcfb379 JH |
16 | void reset_pack_idx_option(struct pack_idx_option *opts) |
17 | { | |
18 | memset(opts, 0, sizeof(*opts)); | |
19 | opts->version = 2; | |
20 | opts->off32_limit = 0x7fffffff; | |
21 | } | |
aa7e44bf GB |
22 | |
23 | static int sha1_compare(const void *_a, const void *_b) | |
24 | { | |
25 | struct pack_idx_entry *a = *(struct pack_idx_entry **)_a; | |
26 | struct pack_idx_entry *b = *(struct pack_idx_entry **)_b; | |
e6a492b7 | 27 | return oidcmp(&a->oid, &b->oid); |
aa7e44bf GB |
28 | } |
29 | ||
3c9fc074 JH |
30 | static int cmp_uint32(const void *a_, const void *b_) |
31 | { | |
32 | uint32_t a = *((uint32_t *)a_); | |
33 | uint32_t b = *((uint32_t *)b_); | |
34 | ||
35 | return (a < b) ? -1 : (a != b); | |
36 | } | |
37 | ||
fb956c1f JH |
38 | static int need_large_offset(off_t offset, const struct pack_idx_option *opts) |
39 | { | |
3c9fc074 JH |
40 | uint32_t ofsval; |
41 | ||
42 | if ((offset >> 31) || (opts->off32_limit < offset)) | |
43 | return 1; | |
44 | if (!opts->anomaly_nr) | |
45 | return 0; | |
46 | ofsval = offset; | |
47 | return !!bsearch(&ofsval, opts->anomaly, opts->anomaly_nr, | |
48 | sizeof(ofsval), cmp_uint32); | |
fb956c1f JH |
49 | } |
50 | ||
aa7e44bf | 51 | /* |
e2bfa50a JB |
52 | * The *sha1 contains the pack content SHA1 hash. |
53 | * The objects array passed in will be sorted by SHA1 on exit. | |
aa7e44bf | 54 | */ |
3bb72562 | 55 | const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, |
ebcfb379 | 56 | int nr_objects, const struct pack_idx_option *opts, |
1190a1ac | 57 | const unsigned char *sha1) |
aa7e44bf | 58 | { |
98a3beab | 59 | struct hashfile *f; |
aa7e44bf GB |
60 | struct pack_idx_entry **sorted_by_sha, **list, **last; |
61 | off_t last_obj_offset = 0; | |
aa7e44bf | 62 | int i, fd; |
aa7e44bf GB |
63 | uint32_t index_version; |
64 | ||
65 | if (nr_objects) { | |
66 | sorted_by_sha = objects; | |
67 | list = sorted_by_sha; | |
68 | last = sorted_by_sha + nr_objects; | |
69 | for (i = 0; i < nr_objects; ++i) { | |
70 | if (objects[i]->offset > last_obj_offset) | |
71 | last_obj_offset = objects[i]->offset; | |
72 | } | |
9ed0d8d6 | 73 | QSORT(sorted_by_sha, nr_objects, sha1_compare); |
aa7e44bf GB |
74 | } |
75 | else | |
76 | sorted_by_sha = list = last = NULL; | |
77 | ||
e337a04d JH |
78 | if (opts->flags & WRITE_IDX_VERIFY) { |
79 | assert(index_name); | |
98a3beab | 80 | f = hashfd_check(index_name); |
aa7e44bf | 81 | } else { |
e337a04d | 82 | if (!index_name) { |
594fa999 JK |
83 | struct strbuf tmp_file = STRBUF_INIT; |
84 | fd = odb_mkstemp(&tmp_file, "pack/tmp_idx_XXXXXX"); | |
85 | index_name = strbuf_detach(&tmp_file, NULL); | |
e337a04d JH |
86 | } else { |
87 | unlink(index_name); | |
66e905b7 | 88 | fd = xopen(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600); |
e337a04d | 89 | } |
98a3beab | 90 | f = hashfd(fd, index_name); |
aa7e44bf | 91 | } |
aa7e44bf GB |
92 | |
93 | /* if last object's offset is >= 2^31 we should use index V2 */ | |
fb956c1f | 94 | index_version = need_large_offset(last_obj_offset, opts) ? 2 : opts->version; |
aa7e44bf GB |
95 | |
96 | /* index versions 2 and above need a header */ | |
97 | if (index_version >= 2) { | |
98 | struct pack_idx_header hdr; | |
99 | hdr.idx_signature = htonl(PACK_IDX_SIGNATURE); | |
100 | hdr.idx_version = htonl(index_version); | |
98a3beab | 101 | hashwrite(f, &hdr, sizeof(hdr)); |
aa7e44bf GB |
102 | } |
103 | ||
104 | /* | |
105 | * Write the first-level table (the list is sorted, | |
106 | * but we use a 256-entry lookup to be able to avoid | |
107 | * having to do eight extra binary search iterations). | |
108 | */ | |
109 | for (i = 0; i < 256; i++) { | |
110 | struct pack_idx_entry **next = list; | |
111 | while (next < last) { | |
112 | struct pack_idx_entry *obj = *next; | |
e6a492b7 | 113 | if (obj->oid.hash[0] != i) |
aa7e44bf GB |
114 | break; |
115 | next++; | |
116 | } | |
06d43fad | 117 | hashwrite_be32(f, next - sorted_by_sha); |
aa7e44bf GB |
118 | list = next; |
119 | } | |
aa7e44bf | 120 | |
aa7e44bf GB |
121 | /* |
122 | * Write the actual SHA1 entries.. | |
123 | */ | |
124 | list = sorted_by_sha; | |
125 | for (i = 0; i < nr_objects; i++) { | |
126 | struct pack_idx_entry *obj = *list++; | |
389cf68c RS |
127 | if (index_version < 2) |
128 | hashwrite_be32(f, obj->offset); | |
98a3beab | 129 | hashwrite(f, obj->oid.hash, the_hash_algo->rawsz); |
68be2fea | 130 | if ((opts->flags & WRITE_IDX_STRICT) && |
4a7e27e9 | 131 | (i && oideq(&list[-2]->oid, &obj->oid))) |
68be2fea | 132 | die("The same object %s appears twice in the pack", |
e6a492b7 | 133 | oid_to_hex(&obj->oid)); |
aa7e44bf GB |
134 | } |
135 | ||
136 | if (index_version >= 2) { | |
137 | unsigned int nr_large_offset = 0; | |
138 | ||
139 | /* write the crc32 table */ | |
140 | list = sorted_by_sha; | |
141 | for (i = 0; i < nr_objects; i++) { | |
142 | struct pack_idx_entry *obj = *list++; | |
389cf68c | 143 | hashwrite_be32(f, obj->crc32); |
aa7e44bf GB |
144 | } |
145 | ||
146 | /* write the 32-bit offset table */ | |
147 | list = sorted_by_sha; | |
148 | for (i = 0; i < nr_objects; i++) { | |
149 | struct pack_idx_entry *obj = *list++; | |
fb956c1f JH |
150 | uint32_t offset; |
151 | ||
152 | offset = (need_large_offset(obj->offset, opts) | |
153 | ? (0x80000000 | nr_large_offset++) | |
154 | : obj->offset); | |
389cf68c | 155 | hashwrite_be32(f, offset); |
aa7e44bf GB |
156 | } |
157 | ||
158 | /* write the large offset table */ | |
159 | list = sorted_by_sha; | |
160 | while (nr_large_offset) { | |
161 | struct pack_idx_entry *obj = *list++; | |
162 | uint64_t offset = obj->offset; | |
fb956c1f JH |
163 | |
164 | if (!need_large_offset(offset, opts)) | |
165 | continue; | |
970909c2 | 166 | hashwrite_be64(f, offset); |
fb956c1f | 167 | nr_large_offset--; |
aa7e44bf GB |
168 | } |
169 | } | |
170 | ||
98a3beab | 171 | hashwrite(f, sha1, the_hash_algo->rawsz); |
020406ea NS |
172 | finalize_hashfile(f, NULL, FSYNC_COMPONENT_PACK_METADATA, |
173 | CSUM_HASH_IN_STREAM | CSUM_CLOSE | | |
174 | ((opts->flags & WRITE_IDX_VERIFY) ? 0 : CSUM_FSYNC)); | |
aa7e44bf GB |
175 | return index_name; |
176 | } | |
8b0eca7c | 177 | |
8ef50d99 TB |
178 | static int pack_order_cmp(const void *va, const void *vb, void *ctx) |
179 | { | |
180 | struct pack_idx_entry **objects = ctx; | |
181 | ||
182 | off_t oa = objects[*(uint32_t*)va]->offset; | |
183 | off_t ob = objects[*(uint32_t*)vb]->offset; | |
184 | ||
185 | if (oa < ob) | |
186 | return -1; | |
187 | if (oa > ob) | |
188 | return 1; | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static void write_rev_header(struct hashfile *f) | |
193 | { | |
8ef50d99 TB |
194 | hashwrite_be32(f, RIDX_SIGNATURE); |
195 | hashwrite_be32(f, RIDX_VERSION); | |
d9fef9d9 | 196 | hashwrite_be32(f, oid_version(the_hash_algo)); |
8ef50d99 TB |
197 | } |
198 | ||
199 | static void write_rev_index_positions(struct hashfile *f, | |
a587b5a7 | 200 | uint32_t *pack_order, |
8ef50d99 TB |
201 | uint32_t nr_objects) |
202 | { | |
8ef50d99 | 203 | uint32_t i; |
8ef50d99 TB |
204 | for (i = 0; i < nr_objects; i++) |
205 | hashwrite_be32(f, pack_order[i]); | |
8ef50d99 TB |
206 | } |
207 | ||
208 | static void write_rev_trailer(struct hashfile *f, const unsigned char *hash) | |
209 | { | |
210 | hashwrite(f, hash, the_hash_algo->rawsz); | |
211 | } | |
212 | ||
213 | const char *write_rev_file(const char *rev_name, | |
214 | struct pack_idx_entry **objects, | |
215 | uint32_t nr_objects, | |
216 | const unsigned char *hash, | |
217 | unsigned flags) | |
a587b5a7 TB |
218 | { |
219 | uint32_t *pack_order; | |
220 | uint32_t i; | |
221 | const char *ret; | |
222 | ||
8fe8bae9 ÆAB |
223 | if (!(flags & WRITE_REV) && !(flags & WRITE_REV_VERIFY)) |
224 | return NULL; | |
225 | ||
a587b5a7 TB |
226 | ALLOC_ARRAY(pack_order, nr_objects); |
227 | for (i = 0; i < nr_objects; i++) | |
228 | pack_order[i] = i; | |
229 | QSORT_S(pack_order, nr_objects, pack_order_cmp, objects); | |
230 | ||
231 | ret = write_rev_file_order(rev_name, pack_order, nr_objects, hash, | |
232 | flags); | |
233 | ||
234 | free(pack_order); | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
239 | const char *write_rev_file_order(const char *rev_name, | |
240 | uint32_t *pack_order, | |
241 | uint32_t nr_objects, | |
242 | const unsigned char *hash, | |
243 | unsigned flags) | |
8ef50d99 TB |
244 | { |
245 | struct hashfile *f; | |
246 | int fd; | |
247 | ||
248 | if ((flags & WRITE_REV) && (flags & WRITE_REV_VERIFY)) | |
249 | die(_("cannot both write and verify reverse index")); | |
250 | ||
251 | if (flags & WRITE_REV) { | |
252 | if (!rev_name) { | |
253 | struct strbuf tmp_file = STRBUF_INIT; | |
254 | fd = odb_mkstemp(&tmp_file, "pack/tmp_rev_XXXXXX"); | |
255 | rev_name = strbuf_detach(&tmp_file, NULL); | |
256 | } else { | |
257 | unlink(rev_name); | |
66e905b7 | 258 | fd = xopen(rev_name, O_CREAT|O_EXCL|O_WRONLY, 0600); |
8ef50d99 TB |
259 | } |
260 | f = hashfd(fd, rev_name); | |
261 | } else if (flags & WRITE_REV_VERIFY) { | |
262 | struct stat statbuf; | |
263 | if (stat(rev_name, &statbuf)) { | |
264 | if (errno == ENOENT) { | |
265 | /* .rev files are optional */ | |
266 | return NULL; | |
267 | } else | |
268 | die_errno(_("could not stat: %s"), rev_name); | |
269 | } | |
270 | f = hashfd_check(rev_name); | |
271 | } else | |
272 | return NULL; | |
273 | ||
274 | write_rev_header(f); | |
275 | ||
a587b5a7 | 276 | write_rev_index_positions(f, pack_order, nr_objects); |
8ef50d99 TB |
277 | write_rev_trailer(f, hash); |
278 | ||
279 | if (rev_name && adjust_shared_perm(rev_name) < 0) | |
280 | die(_("failed to make %s readable"), rev_name); | |
281 | ||
020406ea NS |
282 | finalize_hashfile(f, NULL, FSYNC_COMPONENT_PACK_METADATA, |
283 | CSUM_HASH_IN_STREAM | CSUM_CLOSE | | |
284 | ((flags & WRITE_IDX_VERIFY) ? 0 : CSUM_FSYNC)); | |
8ef50d99 TB |
285 | |
286 | return rev_name; | |
287 | } | |
288 | ||
5dfaf49a TB |
289 | static void write_mtimes_header(struct hashfile *f) |
290 | { | |
291 | hashwrite_be32(f, MTIMES_SIGNATURE); | |
292 | hashwrite_be32(f, MTIMES_VERSION); | |
293 | hashwrite_be32(f, oid_version(the_hash_algo)); | |
294 | } | |
295 | ||
296 | /* | |
297 | * Writes the object mtimes of "objects" for use in a .mtimes file. | |
298 | * Note that objects must be in lexicographic (index) order, which is | |
299 | * the expected ordering of these values in the .mtimes file. | |
300 | */ | |
301 | static void write_mtimes_objects(struct hashfile *f, | |
302 | struct packing_data *to_pack, | |
303 | struct pack_idx_entry **objects, | |
304 | uint32_t nr_objects) | |
305 | { | |
306 | uint32_t i; | |
307 | for (i = 0; i < nr_objects; i++) { | |
308 | struct object_entry *e = (struct object_entry*)objects[i]; | |
309 | hashwrite_be32(f, oe_cruft_mtime(to_pack, e)); | |
310 | } | |
311 | } | |
312 | ||
313 | static void write_mtimes_trailer(struct hashfile *f, const unsigned char *hash) | |
314 | { | |
315 | hashwrite(f, hash, the_hash_algo->rawsz); | |
316 | } | |
317 | ||
c4125835 TB |
318 | static char *write_mtimes_file(struct packing_data *to_pack, |
319 | struct pack_idx_entry **objects, | |
320 | uint32_t nr_objects, | |
321 | const unsigned char *hash) | |
5dfaf49a | 322 | { |
82db195e | 323 | struct strbuf tmp_file = STRBUF_INIT; |
c4125835 | 324 | char *mtimes_name; |
5dfaf49a TB |
325 | struct hashfile *f; |
326 | int fd; | |
327 | ||
328 | if (!to_pack) | |
329 | BUG("cannot call write_mtimes_file with NULL packing_data"); | |
330 | ||
82db195e DS |
331 | fd = odb_mkstemp(&tmp_file, "pack/tmp_mtimes_XXXXXX"); |
332 | mtimes_name = strbuf_detach(&tmp_file, NULL); | |
5dfaf49a TB |
333 | f = hashfd(fd, mtimes_name); |
334 | ||
335 | write_mtimes_header(f); | |
336 | write_mtimes_objects(f, to_pack, objects, nr_objects); | |
337 | write_mtimes_trailer(f, hash); | |
338 | ||
339 | if (adjust_shared_perm(mtimes_name) < 0) | |
340 | die(_("failed to make %s readable"), mtimes_name); | |
341 | ||
342 | finalize_hashfile(f, NULL, FSYNC_COMPONENT_PACK_METADATA, | |
343 | CSUM_HASH_IN_STREAM | CSUM_CLOSE | CSUM_FSYNC); | |
344 | ||
345 | return mtimes_name; | |
346 | } | |
347 | ||
98a3beab | 348 | off_t write_pack_header(struct hashfile *f, uint32_t nr_entries) |
c0ad4657 JH |
349 | { |
350 | struct pack_header hdr; | |
351 | ||
352 | hdr.hdr_signature = htonl(PACK_SIGNATURE); | |
353 | hdr.hdr_version = htonl(PACK_VERSION); | |
354 | hdr.hdr_entries = htonl(nr_entries); | |
98a3beab | 355 | hashwrite(f, &hdr, sizeof(hdr)); |
c0ad4657 JH |
356 | return sizeof(hdr); |
357 | } | |
358 | ||
abeb40e5 NP |
359 | /* |
360 | * Update pack header with object_count and compute new SHA1 for pack data | |
361 | * associated to pack_fd, and write that SHA1 at the end. That new SHA1 | |
362 | * is also returned in new_pack_sha1. | |
363 | * | |
364 | * If partial_pack_sha1 is non null, then the SHA1 of the existing pack | |
365 | * (without the header update) is computed and validated against the | |
366 | * one provided in partial_pack_sha1. The validation is performed at | |
367 | * partial_pack_offset bytes in the pack file. The SHA1 of the remaining | |
368 | * data (i.e. from partial_pack_offset to the end) is then computed and | |
369 | * returned in partial_pack_sha1. | |
370 | * | |
371 | * Note that new_pack_sha1 is updated last, so both new_pack_sha1 and | |
372 | * partial_pack_sha1 can refer to the same buffer if the caller is not | |
373 | * interested in the resulting SHA1 of pack data above partial_pack_offset. | |
374 | */ | |
8b0eca7c | 375 | void fixup_pack_header_footer(int pack_fd, |
81c58cd4 | 376 | unsigned char *new_pack_hash, |
8b0eca7c | 377 | const char *pack_name, |
abeb40e5 | 378 | uint32_t object_count, |
81c58cd4 | 379 | unsigned char *partial_pack_hash, |
abeb40e5 | 380 | off_t partial_pack_offset) |
8b0eca7c | 381 | { |
d35825da | 382 | int aligned_sz, buf_sz = 8 * 1024; |
81c58cd4 | 383 | git_hash_ctx old_hash_ctx, new_hash_ctx; |
8b0eca7c DH |
384 | struct pack_header hdr; |
385 | char *buf; | |
90dca671 | 386 | ssize_t read_result; |
8b0eca7c | 387 | |
81c58cd4 | 388 | the_hash_algo->init_fn(&old_hash_ctx); |
389 | the_hash_algo->init_fn(&new_hash_ctx); | |
abeb40e5 | 390 | |
8b0eca7c | 391 | if (lseek(pack_fd, 0, SEEK_SET) != 0) |
d824cbba | 392 | die_errno("Failed seeking to start of '%s'", pack_name); |
90dca671 JK |
393 | read_result = read_in_full(pack_fd, &hdr, sizeof(hdr)); |
394 | if (read_result < 0) | |
d824cbba | 395 | die_errno("Unable to reread header of '%s'", pack_name); |
90dca671 JK |
396 | else if (read_result != sizeof(hdr)) |
397 | die_errno("Unexpected short read for header of '%s'", | |
398 | pack_name); | |
8b0eca7c | 399 | if (lseek(pack_fd, 0, SEEK_SET) != 0) |
d824cbba | 400 | die_errno("Failed seeking to start of '%s'", pack_name); |
81c58cd4 | 401 | the_hash_algo->update_fn(&old_hash_ctx, &hdr, sizeof(hdr)); |
8b0eca7c | 402 | hdr.hdr_entries = htonl(object_count); |
81c58cd4 | 403 | the_hash_algo->update_fn(&new_hash_ctx, &hdr, sizeof(hdr)); |
8b0eca7c | 404 | write_or_die(pack_fd, &hdr, sizeof(hdr)); |
abeb40e5 | 405 | partial_pack_offset -= sizeof(hdr); |
8b0eca7c DH |
406 | |
407 | buf = xmalloc(buf_sz); | |
d35825da | 408 | aligned_sz = buf_sz - sizeof(hdr); |
8b0eca7c | 409 | for (;;) { |
abeb40e5 | 410 | ssize_t m, n; |
81c58cd4 | 411 | m = (partial_pack_hash && partial_pack_offset < aligned_sz) ? |
d35825da | 412 | partial_pack_offset : aligned_sz; |
abeb40e5 | 413 | n = xread(pack_fd, buf, m); |
8b0eca7c DH |
414 | if (!n) |
415 | break; | |
416 | if (n < 0) | |
d824cbba | 417 | die_errno("Failed to checksum '%s'", pack_name); |
81c58cd4 | 418 | the_hash_algo->update_fn(&new_hash_ctx, buf, n); |
abeb40e5 | 419 | |
d35825da NP |
420 | aligned_sz -= n; |
421 | if (!aligned_sz) | |
422 | aligned_sz = buf_sz; | |
423 | ||
81c58cd4 | 424 | if (!partial_pack_hash) |
abeb40e5 NP |
425 | continue; |
426 | ||
81c58cd4 | 427 | the_hash_algo->update_fn(&old_hash_ctx, buf, n); |
abeb40e5 NP |
428 | partial_pack_offset -= n; |
429 | if (partial_pack_offset == 0) { | |
81c58cd4 | 430 | unsigned char hash[GIT_MAX_RAWSZ]; |
431 | the_hash_algo->final_fn(hash, &old_hash_ctx); | |
67947c34 | 432 | if (!hasheq(hash, partial_pack_hash)) |
abeb40e5 NP |
433 | die("Unexpected checksum for %s " |
434 | "(disk corruption?)", pack_name); | |
435 | /* | |
436 | * Now let's compute the SHA1 of the remainder of the | |
437 | * pack, which also means making partial_pack_offset | |
438 | * big enough not to matter anymore. | |
439 | */ | |
81c58cd4 | 440 | the_hash_algo->init_fn(&old_hash_ctx); |
abeb40e5 NP |
441 | partial_pack_offset = ~partial_pack_offset; |
442 | partial_pack_offset -= MSB(partial_pack_offset, 1); | |
443 | } | |
8b0eca7c DH |
444 | } |
445 | free(buf); | |
446 | ||
81c58cd4 | 447 | if (partial_pack_hash) |
448 | the_hash_algo->final_fn(partial_pack_hash, &old_hash_ctx); | |
449 | the_hash_algo->final_fn(new_pack_hash, &new_hash_ctx); | |
450 | write_or_die(pack_fd, new_pack_hash, the_hash_algo->rawsz); | |
020406ea | 451 | fsync_component_or_die(FSYNC_COMPONENT_PACK, pack_fd, pack_name); |
8b0eca7c | 452 | } |
106764e6 | 453 | |
5476e1ef | 454 | char *index_pack_lockfile(int ip_out, int *is_well_formed) |
106764e6 | 455 | { |
81c58cd4 | 456 | char packname[GIT_MAX_HEXSZ + 6]; |
457 | const int len = the_hash_algo->hexsz + 6; | |
106764e6 SP |
458 | |
459 | /* | |
6e180cdc | 460 | * The first thing we expect from index-pack's output |
106764e6 SP |
461 | * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where |
462 | * %40s is the newly created pack SHA1 name. In the "keep" | |
463 | * case, we need it to remove the corresponding .keep file | |
464 | * later on. If we don't get that then tough luck with it. | |
465 | */ | |
81c58cd4 | 466 | if (read_in_full(ip_out, packname, len) == len && packname[len-1] == '\n') { |
d7731444 | 467 | const char *name; |
5476e1ef JT |
468 | |
469 | if (is_well_formed) | |
470 | *is_well_formed = 1; | |
81c58cd4 | 471 | packname[len-1] = 0; |
d7731444 RS |
472 | if (skip_prefix(packname, "keep\t", &name)) |
473 | return xstrfmt("%s/pack/pack-%s.keep", | |
474 | get_object_directory(), name); | |
5476e1ef | 475 | return NULL; |
106764e6 | 476 | } |
5476e1ef JT |
477 | if (is_well_formed) |
478 | *is_well_formed = 0; | |
106764e6 SP |
479 | return NULL; |
480 | } | |
f965c525 NP |
481 | |
482 | /* | |
483 | * The per-object header is a pretty dense thing, which is | |
484 | * - first byte: low four bits are "size", then three bits of "type", | |
485 | * and the high bit is "size continues". | |
486 | * - each byte afterwards: low seven bits are size continuation, | |
487 | * with the high bit being "size continues" | |
488 | */ | |
7202a6fa JK |
489 | int encode_in_pack_object_header(unsigned char *hdr, int hdr_len, |
490 | enum object_type type, uintmax_t size) | |
f965c525 NP |
491 | { |
492 | int n = 1; | |
493 | unsigned char c; | |
494 | ||
495 | if (type < OBJ_COMMIT || type > OBJ_REF_DELTA) | |
496 | die("bad type %d", type); | |
497 | ||
498 | c = (type << 4) | (size & 15); | |
499 | size >>= 4; | |
500 | while (size) { | |
7202a6fa JK |
501 | if (n == hdr_len) |
502 | die("object size is too enormous to format"); | |
f965c525 NP |
503 | *hdr++ = c | 0x80; |
504 | c = size & 0x7f; | |
505 | size >>= 7; | |
506 | n++; | |
507 | } | |
508 | *hdr = c; | |
509 | return n; | |
510 | } | |
cdf9db3c | 511 | |
98a3beab | 512 | struct hashfile *create_tmp_packfile(char **pack_tmp_name) |
cdf9db3c | 513 | { |
594fa999 | 514 | struct strbuf tmpname = STRBUF_INIT; |
cdf9db3c JH |
515 | int fd; |
516 | ||
594fa999 JK |
517 | fd = odb_mkstemp(&tmpname, "pack/tmp_pack_XXXXXX"); |
518 | *pack_tmp_name = strbuf_detach(&tmpname, NULL); | |
98a3beab | 519 | return hashfd(fd, *pack_tmp_name); |
cdf9db3c | 520 | } |
0e990530 | 521 | |
66833f0e ÆAB |
522 | static void rename_tmp_packfile(struct strbuf *name_prefix, const char *source, |
523 | const char *ext) | |
524 | { | |
525 | size_t name_prefix_len = name_prefix->len; | |
526 | ||
527 | strbuf_addstr(name_prefix, ext); | |
528 | if (rename(source, name_prefix->buf)) | |
529 | die_errno("unable to rename temporary file to '%s'", | |
530 | name_prefix->buf); | |
531 | strbuf_setlen(name_prefix, name_prefix_len); | |
532 | } | |
533 | ||
2ec02dd5 ÆAB |
534 | void rename_tmp_packfile_idx(struct strbuf *name_buffer, |
535 | char **idx_tmp_name) | |
536 | { | |
537 | rename_tmp_packfile(name_buffer, *idx_tmp_name, "idx"); | |
538 | } | |
539 | ||
540 | void stage_tmp_packfiles(struct strbuf *name_buffer, | |
0e990530 JH |
541 | const char *pack_tmp_name, |
542 | struct pack_idx_entry **written_list, | |
543 | uint32_t nr_written, | |
1c573cdd | 544 | struct packing_data *to_pack, |
0e990530 | 545 | struct pack_idx_option *pack_idx_opts, |
2ec02dd5 ÆAB |
546 | unsigned char hash[], |
547 | char **idx_tmp_name) | |
0e990530 | 548 | { |
2ec02dd5 | 549 | const char *rev_tmp_name = NULL; |
c4125835 | 550 | char *mtimes_tmp_name = NULL; |
0e990530 JH |
551 | |
552 | if (adjust_shared_perm(pack_tmp_name)) | |
553 | die_errno("unable to make temporary pack file readable"); | |
554 | ||
2ec02dd5 ÆAB |
555 | *idx_tmp_name = (char *)write_idx_file(NULL, written_list, nr_written, |
556 | pack_idx_opts, hash); | |
557 | if (adjust_shared_perm(*idx_tmp_name)) | |
0e990530 JH |
558 | die_errno("unable to make temporary index file readable"); |
559 | ||
8ef50d99 TB |
560 | rev_tmp_name = write_rev_file(NULL, written_list, nr_written, hash, |
561 | pack_idx_opts->flags); | |
562 | ||
5dfaf49a | 563 | if (pack_idx_opts->flags & WRITE_MTIMES) { |
82db195e | 564 | mtimes_tmp_name = write_mtimes_file(to_pack, written_list, |
5dfaf49a TB |
565 | nr_written, |
566 | hash); | |
567 | } | |
568 | ||
66833f0e | 569 | rename_tmp_packfile(name_buffer, pack_tmp_name, "pack"); |
66833f0e ÆAB |
570 | if (rev_tmp_name) |
571 | rename_tmp_packfile(name_buffer, rev_tmp_name, "rev"); | |
5dfaf49a TB |
572 | if (mtimes_tmp_name) |
573 | rename_tmp_packfile(name_buffer, mtimes_tmp_name, "mtimes"); | |
3969e6c5 TB |
574 | |
575 | free((char *)rev_tmp_name); | |
c4125835 | 576 | free(mtimes_tmp_name); |
0e990530 | 577 | } |
33add2ad CC |
578 | |
579 | void write_promisor_file(const char *promisor_name, struct ref **sought, int nr_sought) | |
580 | { | |
7c99bc23 | 581 | int i, err; |
33add2ad CC |
582 | FILE *output = xfopen(promisor_name, "w"); |
583 | ||
584 | for (i = 0; i < nr_sought; i++) | |
585 | fprintf(output, "%s %s\n", oid_to_hex(&sought[i]->old_oid), | |
586 | sought[i]->name); | |
7c99bc23 CC |
587 | |
588 | err = ferror(output); | |
589 | err |= fclose(output); | |
590 | if (err) | |
591 | die(_("could not write '%s' promisor file"), promisor_name); | |
33add2ad | 592 | } |