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Commit | Line | Data |
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7cc8f971 | 1 | #include "cache.h" |
cbd53a21 | 2 | #include "object-store.h" |
7cc8f971 VM |
3 | #include "commit.h" |
4 | #include "tag.h" | |
5 | #include "diff.h" | |
6 | #include "revision.h" | |
7 | #include "list-objects.h" | |
8 | #include "progress.h" | |
9 | #include "pack-revindex.h" | |
10 | #include "pack.h" | |
11 | #include "pack-bitmap.h" | |
12 | #include "sha1-lookup.h" | |
13 | #include "pack-objects.h" | |
64043556 | 14 | #include "commit-reach.h" |
7cc8f971 VM |
15 | |
16 | struct bitmapped_commit { | |
17 | struct commit *commit; | |
18 | struct ewah_bitmap *bitmap; | |
19 | struct ewah_bitmap *write_as; | |
20 | int flags; | |
21 | int xor_offset; | |
22 | uint32_t commit_pos; | |
23 | }; | |
24 | ||
25 | struct bitmap_writer { | |
26 | struct ewah_bitmap *commits; | |
27 | struct ewah_bitmap *trees; | |
28 | struct ewah_bitmap *blobs; | |
29 | struct ewah_bitmap *tags; | |
30 | ||
d2bc62b1 JK |
31 | kh_oid_map_t *bitmaps; |
32 | kh_oid_map_t *reused; | |
7cc8f971 VM |
33 | struct packing_data *to_pack; |
34 | ||
35 | struct bitmapped_commit *selected; | |
36 | unsigned int selected_nr, selected_alloc; | |
37 | ||
38 | struct progress *progress; | |
39 | int show_progress; | |
825544a3 | 40 | unsigned char pack_checksum[GIT_MAX_RAWSZ]; |
7cc8f971 VM |
41 | }; |
42 | ||
43 | static struct bitmap_writer writer; | |
44 | ||
45 | void bitmap_writer_show_progress(int show) | |
46 | { | |
47 | writer.show_progress = show; | |
48 | } | |
49 | ||
50 | /** | |
51 | * Build the initial type index for the packfile | |
52 | */ | |
06af3bba NTND |
53 | void bitmap_writer_build_type_index(struct packing_data *to_pack, |
54 | struct pack_idx_entry **index, | |
7cc8f971 VM |
55 | uint32_t index_nr) |
56 | { | |
57 | uint32_t i; | |
58 | ||
59 | writer.commits = ewah_new(); | |
60 | writer.trees = ewah_new(); | |
61 | writer.blobs = ewah_new(); | |
62 | writer.tags = ewah_new(); | |
06af3bba | 63 | ALLOC_ARRAY(to_pack->in_pack_pos, to_pack->nr_objects); |
7cc8f971 VM |
64 | |
65 | for (i = 0; i < index_nr; ++i) { | |
66 | struct object_entry *entry = (struct object_entry *)index[i]; | |
67 | enum object_type real_type; | |
68 | ||
06af3bba | 69 | oe_set_in_pack_pos(to_pack, entry, i); |
7cc8f971 | 70 | |
fd9b1bae | 71 | switch (oe_type(entry)) { |
7cc8f971 VM |
72 | case OBJ_COMMIT: |
73 | case OBJ_TREE: | |
74 | case OBJ_BLOB: | |
75 | case OBJ_TAG: | |
fd9b1bae | 76 | real_type = oe_type(entry); |
7cc8f971 VM |
77 | break; |
78 | ||
79 | default: | |
7c141127 | 80 | real_type = oid_object_info(to_pack->repo, |
0df8e965 | 81 | &entry->idx.oid, NULL); |
7cc8f971 VM |
82 | break; |
83 | } | |
84 | ||
85 | switch (real_type) { | |
86 | case OBJ_COMMIT: | |
87 | ewah_set(writer.commits, i); | |
88 | break; | |
89 | ||
90 | case OBJ_TREE: | |
91 | ewah_set(writer.trees, i); | |
92 | break; | |
93 | ||
94 | case OBJ_BLOB: | |
95 | ewah_set(writer.blobs, i); | |
96 | break; | |
97 | ||
98 | case OBJ_TAG: | |
99 | ewah_set(writer.tags, i); | |
100 | break; | |
101 | ||
102 | default: | |
103 | die("Missing type information for %s (%d/%d)", | |
e6a492b7 | 104 | oid_to_hex(&entry->idx.oid), real_type, |
fd9b1bae | 105 | oe_type(entry)); |
7cc8f971 VM |
106 | } |
107 | } | |
108 | } | |
109 | ||
110 | /** | |
111 | * Compute the actual bitmaps | |
112 | */ | |
7cc8f971 VM |
113 | |
114 | static inline void push_bitmapped_commit(struct commit *commit, struct ewah_bitmap *reused) | |
115 | { | |
116 | if (writer.selected_nr >= writer.selected_alloc) { | |
117 | writer.selected_alloc = (writer.selected_alloc + 32) * 2; | |
2756ca43 | 118 | REALLOC_ARRAY(writer.selected, writer.selected_alloc); |
7cc8f971 VM |
119 | } |
120 | ||
121 | writer.selected[writer.selected_nr].commit = commit; | |
122 | writer.selected[writer.selected_nr].bitmap = reused; | |
123 | writer.selected[writer.selected_nr].flags = 0; | |
124 | ||
125 | writer.selected_nr++; | |
126 | } | |
127 | ||
05805d74 | 128 | static uint32_t find_object_pos(const struct object_id *oid) |
7cc8f971 | 129 | { |
3a37876b | 130 | struct object_entry *entry = packlist_find(writer.to_pack, oid); |
7cc8f971 VM |
131 | |
132 | if (!entry) { | |
133 | die("Failed to write bitmap index. Packfile doesn't have full closure " | |
05805d74 | 134 | "(object %s is missing)", oid_to_hex(oid)); |
7cc8f971 VM |
135 | } |
136 | ||
06af3bba | 137 | return oe_in_pack_pos(writer.to_pack, entry); |
7cc8f971 VM |
138 | } |
139 | ||
7cc8f971 VM |
140 | static void compute_xor_offsets(void) |
141 | { | |
142 | static const int MAX_XOR_OFFSET_SEARCH = 10; | |
143 | ||
144 | int i, next = 0; | |
145 | ||
146 | while (next < writer.selected_nr) { | |
147 | struct bitmapped_commit *stored = &writer.selected[next]; | |
148 | ||
149 | int best_offset = 0; | |
150 | struct ewah_bitmap *best_bitmap = stored->bitmap; | |
151 | struct ewah_bitmap *test_xor; | |
152 | ||
153 | for (i = 1; i <= MAX_XOR_OFFSET_SEARCH; ++i) { | |
154 | int curr = next - i; | |
155 | ||
156 | if (curr < 0) | |
157 | break; | |
158 | ||
159 | test_xor = ewah_pool_new(); | |
160 | ewah_xor(writer.selected[curr].bitmap, stored->bitmap, test_xor); | |
161 | ||
162 | if (test_xor->buffer_size < best_bitmap->buffer_size) { | |
163 | if (best_bitmap != stored->bitmap) | |
164 | ewah_pool_free(best_bitmap); | |
165 | ||
166 | best_bitmap = test_xor; | |
167 | best_offset = i; | |
168 | } else { | |
169 | ewah_pool_free(test_xor); | |
170 | } | |
171 | } | |
172 | ||
173 | stored->xor_offset = best_offset; | |
174 | stored->write_as = best_bitmap; | |
175 | ||
176 | next++; | |
177 | } | |
178 | } | |
179 | ||
4a9c5817 JK |
180 | struct bb_commit { |
181 | struct commit_list *children; | |
182 | struct bitmap *bitmap; | |
183 | unsigned selected:1; | |
184 | unsigned idx; /* within selected array */ | |
185 | }; | |
7cc8f971 | 186 | |
4a9c5817 | 187 | define_commit_slab(bb_data, struct bb_commit); |
7cc8f971 | 188 | |
4a9c5817 JK |
189 | struct bitmap_builder { |
190 | struct bb_data data; | |
191 | struct commit **commits; | |
192 | size_t commits_nr, commits_alloc; | |
193 | }; | |
7cc8f971 | 194 | |
4a9c5817 JK |
195 | static void bitmap_builder_init(struct bitmap_builder *bb, |
196 | struct bitmap_writer *writer) | |
197 | { | |
198 | struct rev_info revs; | |
199 | struct commit *commit; | |
200 | unsigned int i; | |
7cc8f971 | 201 | |
4a9c5817 JK |
202 | memset(bb, 0, sizeof(*bb)); |
203 | init_bb_data(&bb->data); | |
7cc8f971 | 204 | |
7cc8f971 | 205 | reset_revision_walk(); |
4a9c5817 JK |
206 | repo_init_revisions(writer->to_pack->repo, &revs, NULL); |
207 | revs.topo_order = 1; | |
208 | ||
209 | for (i = 0; i < writer->selected_nr; i++) { | |
210 | struct commit *c = writer->selected[i].commit; | |
211 | struct bb_commit *ent = bb_data_at(&bb->data, c); | |
212 | ent->selected = 1; | |
213 | ent->idx = i; | |
214 | add_pending_object(&revs, &c->object, ""); | |
215 | } | |
7cc8f971 | 216 | |
4a9c5817 JK |
217 | if (prepare_revision_walk(&revs)) |
218 | die("revision walk setup failed"); | |
7cc8f971 | 219 | |
4a9c5817 JK |
220 | while ((commit = get_revision(&revs))) { |
221 | struct commit_list *p; | |
7cc8f971 | 222 | |
4a9c5817 | 223 | parse_commit_or_die(commit); |
7cc8f971 | 224 | |
4a9c5817 JK |
225 | ALLOC_GROW(bb->commits, bb->commits_nr + 1, bb->commits_alloc); |
226 | bb->commits[bb->commits_nr++] = commit; | |
7cc8f971 | 227 | |
4a9c5817 JK |
228 | for (p = commit->parents; p; p = p->next) { |
229 | struct bb_commit *ent = bb_data_at(&bb->data, p->item); | |
230 | commit_list_insert(commit, &ent->children); | |
231 | } | |
232 | } | |
233 | } | |
234 | ||
235 | static void bitmap_builder_clear(struct bitmap_builder *bb) | |
236 | { | |
237 | clear_bb_data(&bb->data); | |
238 | free(bb->commits); | |
239 | bb->commits_nr = bb->commits_alloc = 0; | |
240 | } | |
241 | ||
242 | static void fill_bitmap_tree(struct bitmap *bitmap, | |
243 | struct tree *tree) | |
244 | { | |
245 | uint32_t pos; | |
246 | struct tree_desc desc; | |
247 | struct name_entry entry; | |
248 | ||
249 | /* | |
250 | * If our bit is already set, then there is nothing to do. Both this | |
251 | * tree and all of its children will be set. | |
252 | */ | |
253 | pos = find_object_pos(&tree->object.oid); | |
254 | if (bitmap_get(bitmap, pos)) | |
255 | return; | |
256 | bitmap_set(bitmap, pos); | |
257 | ||
258 | if (parse_tree(tree) < 0) | |
259 | die("unable to load tree object %s", | |
260 | oid_to_hex(&tree->object.oid)); | |
261 | init_tree_desc(&desc, tree->buffer, tree->size); | |
262 | ||
263 | while (tree_entry(&desc, &entry)) { | |
264 | switch (object_type(entry.mode)) { | |
265 | case OBJ_TREE: | |
266 | fill_bitmap_tree(bitmap, | |
267 | lookup_tree(the_repository, &entry.oid)); | |
268 | break; | |
269 | case OBJ_BLOB: | |
270 | bitmap_set(bitmap, find_object_pos(&entry.oid)); | |
271 | break; | |
272 | default: | |
273 | /* Gitlink, etc; not reachable */ | |
274 | break; | |
275 | } | |
276 | } | |
7cc8f971 | 277 | |
4a9c5817 JK |
278 | free_tree_buffer(tree); |
279 | } | |
7cc8f971 | 280 | |
4a9c5817 JK |
281 | static void fill_bitmap_commit(struct bb_commit *ent, |
282 | struct commit *commit) | |
283 | { | |
284 | if (!ent->bitmap) | |
285 | ent->bitmap = bitmap_new(); | |
286 | ||
287 | /* | |
288 | * mark ourselves, but do not bother with parents; their values | |
289 | * will already have been propagated to us | |
290 | */ | |
291 | bitmap_set(ent->bitmap, find_object_pos(&commit->object.oid)); | |
292 | fill_bitmap_tree(ent->bitmap, get_commit_tree(commit)); | |
293 | } | |
7cc8f971 | 294 | |
4a9c5817 JK |
295 | static void store_selected(struct bb_commit *ent, struct commit *commit) |
296 | { | |
297 | struct bitmapped_commit *stored = &writer.selected[ent->idx]; | |
298 | khiter_t hash_pos; | |
299 | int hash_ret; | |
300 | ||
301 | /* | |
302 | * the "reuse bitmaps" phase may have stored something here, but | |
303 | * our new algorithm doesn't use it. Drop it. | |
304 | */ | |
305 | if (stored->bitmap) | |
306 | ewah_free(stored->bitmap); | |
307 | ||
308 | stored->bitmap = bitmap_to_ewah(ent->bitmap); | |
309 | ||
310 | hash_pos = kh_put_oid_map(writer.bitmaps, commit->object.oid, &hash_ret); | |
311 | if (hash_ret == 0) | |
312 | die("Duplicate entry when writing index: %s", | |
313 | oid_to_hex(&commit->object.oid)); | |
314 | kh_value(writer.bitmaps, hash_pos) = stored; | |
315 | } | |
7cc8f971 | 316 | |
4a9c5817 JK |
317 | void bitmap_writer_build(struct packing_data *to_pack) |
318 | { | |
319 | struct bitmap_builder bb; | |
320 | size_t i; | |
321 | int nr_stored = 0; /* for progress */ | |
7cc8f971 | 322 | |
4a9c5817 JK |
323 | writer.bitmaps = kh_init_oid_map(); |
324 | writer.to_pack = to_pack; | |
325 | ||
326 | if (writer.show_progress) | |
327 | writer.progress = start_progress("Building bitmaps", writer.selected_nr); | |
328 | trace2_region_enter("pack-bitmap-write", "building_bitmaps_total", | |
329 | the_repository); | |
7cc8f971 | 330 | |
4a9c5817 JK |
331 | bitmap_builder_init(&bb, &writer); |
332 | for (i = bb.commits_nr; i > 0; i--) { | |
333 | struct commit *commit = bb.commits[i-1]; | |
334 | struct bb_commit *ent = bb_data_at(&bb.data, commit); | |
335 | struct commit *child; | |
010e5eac | 336 | int reused = 0; |
7cc8f971 | 337 | |
4a9c5817 | 338 | fill_bitmap_commit(ent, commit); |
7cc8f971 | 339 | |
4a9c5817 JK |
340 | if (ent->selected) { |
341 | store_selected(ent, commit); | |
342 | nr_stored++; | |
343 | display_progress(writer.progress, nr_stored); | |
344 | } | |
345 | ||
346 | while ((child = pop_commit(&ent->children))) { | |
347 | struct bb_commit *child_ent = | |
348 | bb_data_at(&bb.data, child); | |
349 | ||
350 | if (child_ent->bitmap) | |
351 | bitmap_or(child_ent->bitmap, ent->bitmap); | |
010e5eac | 352 | else if (reused) |
4a9c5817 | 353 | child_ent->bitmap = bitmap_dup(ent->bitmap); |
010e5eac JK |
354 | else { |
355 | child_ent->bitmap = ent->bitmap; | |
356 | reused = 1; | |
357 | } | |
4a9c5817 | 358 | } |
010e5eac JK |
359 | if (!reused) |
360 | bitmap_free(ent->bitmap); | |
4a9c5817 | 361 | ent->bitmap = NULL; |
7cc8f971 | 362 | } |
4a9c5817 JK |
363 | bitmap_builder_clear(&bb); |
364 | ||
365 | trace2_region_leave("pack-bitmap-write", "building_bitmaps_total", | |
366 | the_repository); | |
7cc8f971 | 367 | |
7cc8f971 VM |
368 | stop_progress(&writer.progress); |
369 | ||
370 | compute_xor_offsets(); | |
371 | } | |
372 | ||
373 | /** | |
374 | * Select the commits that will be bitmapped | |
375 | */ | |
376 | static inline unsigned int next_commit_index(unsigned int idx) | |
377 | { | |
378 | static const unsigned int MIN_COMMITS = 100; | |
379 | static const unsigned int MAX_COMMITS = 5000; | |
380 | ||
381 | static const unsigned int MUST_REGION = 100; | |
382 | static const unsigned int MIN_REGION = 20000; | |
383 | ||
384 | unsigned int offset, next; | |
385 | ||
386 | if (idx <= MUST_REGION) | |
387 | return 0; | |
388 | ||
389 | if (idx <= MIN_REGION) { | |
390 | offset = idx - MUST_REGION; | |
391 | return (offset < MIN_COMMITS) ? offset : MIN_COMMITS; | |
392 | } | |
393 | ||
394 | offset = idx - MIN_REGION; | |
395 | next = (offset < MAX_COMMITS) ? offset : MAX_COMMITS; | |
396 | ||
397 | return (next > MIN_COMMITS) ? next : MIN_COMMITS; | |
398 | } | |
399 | ||
400 | static int date_compare(const void *_a, const void *_b) | |
401 | { | |
402 | struct commit *a = *(struct commit **)_a; | |
403 | struct commit *b = *(struct commit **)_b; | |
404 | return (long)b->date - (long)a->date; | |
405 | } | |
406 | ||
407 | void bitmap_writer_reuse_bitmaps(struct packing_data *to_pack) | |
408 | { | |
3ae5fa07 | 409 | struct bitmap_index *bitmap_git; |
7c141127 | 410 | if (!(bitmap_git = prepare_bitmap_git(to_pack->repo))) |
7cc8f971 VM |
411 | return; |
412 | ||
d2bc62b1 | 413 | writer.reused = kh_init_oid_map(); |
3ae5fa07 JT |
414 | rebuild_existing_bitmaps(bitmap_git, to_pack, writer.reused, |
415 | writer.show_progress); | |
f3c23db2 JT |
416 | /* |
417 | * NEEDSWORK: rebuild_existing_bitmaps() makes writer.reused reference | |
418 | * some bitmaps in bitmap_git, so we can't free the latter. | |
419 | */ | |
7cc8f971 VM |
420 | } |
421 | ||
05805d74 | 422 | static struct ewah_bitmap *find_reused_bitmap(const struct object_id *oid) |
7cc8f971 VM |
423 | { |
424 | khiter_t hash_pos; | |
425 | ||
426 | if (!writer.reused) | |
427 | return NULL; | |
428 | ||
d2bc62b1 | 429 | hash_pos = kh_get_oid_map(writer.reused, *oid); |
7cc8f971 VM |
430 | if (hash_pos >= kh_end(writer.reused)) |
431 | return NULL; | |
432 | ||
433 | return kh_value(writer.reused, hash_pos); | |
434 | } | |
435 | ||
436 | void bitmap_writer_select_commits(struct commit **indexed_commits, | |
437 | unsigned int indexed_commits_nr, | |
438 | int max_bitmaps) | |
439 | { | |
440 | unsigned int i = 0, j, next; | |
441 | ||
9ed0d8d6 | 442 | QSORT(indexed_commits, indexed_commits_nr, date_compare); |
7cc8f971 VM |
443 | |
444 | if (writer.show_progress) | |
445 | writer.progress = start_progress("Selecting bitmap commits", 0); | |
446 | ||
447 | if (indexed_commits_nr < 100) { | |
448 | for (i = 0; i < indexed_commits_nr; ++i) | |
449 | push_bitmapped_commit(indexed_commits[i], NULL); | |
450 | return; | |
451 | } | |
452 | ||
453 | for (;;) { | |
454 | struct ewah_bitmap *reused_bitmap = NULL; | |
455 | struct commit *chosen = NULL; | |
456 | ||
457 | next = next_commit_index(i); | |
458 | ||
459 | if (i + next >= indexed_commits_nr) | |
460 | break; | |
461 | ||
462 | if (max_bitmaps > 0 && writer.selected_nr >= max_bitmaps) { | |
463 | writer.selected_nr = max_bitmaps; | |
464 | break; | |
465 | } | |
466 | ||
467 | if (next == 0) { | |
468 | chosen = indexed_commits[i]; | |
05805d74 | 469 | reused_bitmap = find_reused_bitmap(&chosen->object.oid); |
7cc8f971 VM |
470 | } else { |
471 | chosen = indexed_commits[i + next]; | |
472 | ||
473 | for (j = 0; j <= next; ++j) { | |
474 | struct commit *cm = indexed_commits[i + j]; | |
475 | ||
05805d74 | 476 | reused_bitmap = find_reused_bitmap(&cm->object.oid); |
7cc8f971 VM |
477 | if (reused_bitmap || (cm->object.flags & NEEDS_BITMAP) != 0) { |
478 | chosen = cm; | |
479 | break; | |
480 | } | |
481 | ||
482 | if (cm->parents && cm->parents->next) | |
483 | chosen = cm; | |
484 | } | |
485 | } | |
486 | ||
487 | push_bitmapped_commit(chosen, reused_bitmap); | |
488 | ||
489 | i += next + 1; | |
490 | display_progress(writer.progress, i); | |
491 | } | |
492 | ||
493 | stop_progress(&writer.progress); | |
494 | } | |
495 | ||
496 | ||
98a3beab | 497 | static int hashwrite_ewah_helper(void *f, const void *buf, size_t len) |
7cc8f971 | 498 | { |
98a3beab | 499 | /* hashwrite will die on error */ |
500 | hashwrite(f, buf, len); | |
7cc8f971 VM |
501 | return len; |
502 | } | |
503 | ||
504 | /** | |
505 | * Write the bitmap index to disk | |
506 | */ | |
98a3beab | 507 | static inline void dump_bitmap(struct hashfile *f, struct ewah_bitmap *bitmap) |
7cc8f971 | 508 | { |
98a3beab | 509 | if (ewah_serialize_to(bitmap, hashwrite_ewah_helper, f) < 0) |
7cc8f971 VM |
510 | die("Failed to write bitmap index"); |
511 | } | |
512 | ||
513 | static const unsigned char *sha1_access(size_t pos, void *table) | |
514 | { | |
515 | struct pack_idx_entry **index = table; | |
e6a492b7 | 516 | return index[pos]->oid.hash; |
7cc8f971 VM |
517 | } |
518 | ||
98a3beab | 519 | static void write_selected_commits_v1(struct hashfile *f, |
7cc8f971 VM |
520 | struct pack_idx_entry **index, |
521 | uint32_t index_nr) | |
522 | { | |
523 | int i; | |
524 | ||
525 | for (i = 0; i < writer.selected_nr; ++i) { | |
526 | struct bitmapped_commit *stored = &writer.selected[i]; | |
7cc8f971 VM |
527 | |
528 | int commit_pos = | |
ed1c9977 | 529 | sha1_pos(stored->commit->object.oid.hash, index, index_nr, sha1_access); |
7cc8f971 VM |
530 | |
531 | if (commit_pos < 0) | |
033abf97 | 532 | BUG("trying to write commit not in index"); |
7cc8f971 | 533 | |
98a3beab | 534 | hashwrite_be32(f, commit_pos); |
535 | hashwrite_u8(f, stored->xor_offset); | |
536 | hashwrite_u8(f, stored->flags); | |
7cc8f971 | 537 | |
7cc8f971 VM |
538 | dump_bitmap(f, stored->write_as); |
539 | } | |
540 | } | |
541 | ||
98a3beab | 542 | static void write_hash_cache(struct hashfile *f, |
ae4f07fb VM |
543 | struct pack_idx_entry **index, |
544 | uint32_t index_nr) | |
545 | { | |
546 | uint32_t i; | |
547 | ||
548 | for (i = 0; i < index_nr; ++i) { | |
549 | struct object_entry *entry = (struct object_entry *)index[i]; | |
7744a5d6 | 550 | hashwrite_be32(f, entry->hash); |
ae4f07fb VM |
551 | } |
552 | } | |
553 | ||
7cc8f971 VM |
554 | void bitmap_writer_set_checksum(unsigned char *sha1) |
555 | { | |
556 | hashcpy(writer.pack_checksum, sha1); | |
557 | } | |
558 | ||
559 | void bitmap_writer_finish(struct pack_idx_entry **index, | |
560 | uint32_t index_nr, | |
ae4f07fb VM |
561 | const char *filename, |
562 | uint16_t options) | |
7cc8f971 | 563 | { |
7cc8f971 VM |
564 | static uint16_t default_version = 1; |
565 | static uint16_t flags = BITMAP_OPT_FULL_DAG; | |
594fa999 | 566 | struct strbuf tmp_file = STRBUF_INIT; |
98a3beab | 567 | struct hashfile *f; |
7cc8f971 VM |
568 | |
569 | struct bitmap_disk_header header; | |
570 | ||
594fa999 | 571 | int fd = odb_mkstemp(&tmp_file, "pack/tmp_bitmap_XXXXXX"); |
7cc8f971 | 572 | |
98a3beab | 573 | f = hashfd(fd, tmp_file.buf); |
7cc8f971 VM |
574 | |
575 | memcpy(header.magic, BITMAP_IDX_SIGNATURE, sizeof(BITMAP_IDX_SIGNATURE)); | |
576 | header.version = htons(default_version); | |
ae4f07fb | 577 | header.options = htons(flags | options); |
7cc8f971 | 578 | header.entry_count = htonl(writer.selected_nr); |
50546b15 | 579 | hashcpy(header.checksum, writer.pack_checksum); |
7cc8f971 | 580 | |
0f4d6cad | 581 | hashwrite(f, &header, sizeof(header) - GIT_MAX_RAWSZ + the_hash_algo->rawsz); |
7cc8f971 VM |
582 | dump_bitmap(f, writer.commits); |
583 | dump_bitmap(f, writer.trees); | |
584 | dump_bitmap(f, writer.blobs); | |
585 | dump_bitmap(f, writer.tags); | |
586 | write_selected_commits_v1(f, index, index_nr); | |
587 | ||
ae4f07fb VM |
588 | if (options & BITMAP_OPT_HASH_CACHE) |
589 | write_hash_cache(f, index, index_nr); | |
590 | ||
cfe83216 | 591 | finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC | CSUM_CLOSE); |
7cc8f971 | 592 | |
594fa999 | 593 | if (adjust_shared_perm(tmp_file.buf)) |
7cc8f971 VM |
594 | die_errno("unable to make temporary bitmap file readable"); |
595 | ||
594fa999 | 596 | if (rename(tmp_file.buf, filename)) |
7cc8f971 | 597 | die_errno("unable to rename temporary bitmap file to '%s'", filename); |
594fa999 JK |
598 | |
599 | strbuf_release(&tmp_file); | |
7cc8f971 | 600 | } |