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Commit | Line | Data |
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08fd81c9 DS |
1 | #include "cache.h" |
2 | #include "config.h" | |
33286dcd | 3 | #include "dir.h" |
08fd81c9 DS |
4 | #include "git-compat-util.h" |
5 | #include "lockfile.h" | |
6 | #include "pack.h" | |
7 | #include "packfile.h" | |
8 | #include "commit.h" | |
9 | #include "object.h" | |
59fb8770 | 10 | #include "refs.h" |
08fd81c9 DS |
11 | #include "revision.h" |
12 | #include "sha1-lookup.h" | |
13 | #include "commit-graph.h" | |
b10edb2d | 14 | #include "object-store.h" |
96af91d4 | 15 | #include "alloc.h" |
d6538246 DS |
16 | #include "hashmap.h" |
17 | #include "replace-object.h" | |
7b0f2292 | 18 | #include "progress.h" |
08fd81c9 DS |
19 | |
20 | #define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */ | |
21 | #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */ | |
22 | #define GRAPH_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */ | |
23 | #define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */ | |
5af7417b | 24 | #define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */ |
118bd570 | 25 | #define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */ |
08fd81c9 | 26 | |
c1665998 | 27 | #define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16) |
08fd81c9 DS |
28 | |
29 | #define GRAPH_VERSION_1 0x1 | |
30 | #define GRAPH_VERSION GRAPH_VERSION_1 | |
31 | ||
5af7417b | 32 | #define GRAPH_EXTRA_EDGES_NEEDED 0x80000000 |
08fd81c9 DS |
33 | #define GRAPH_EDGE_LAST_MASK 0x7fffffff |
34 | #define GRAPH_PARENT_NONE 0x70000000 | |
35 | ||
36 | #define GRAPH_LAST_EDGE 0x80000000 | |
37 | ||
0e3b97cc | 38 | #define GRAPH_HEADER_SIZE 8 |
08fd81c9 DS |
39 | #define GRAPH_FANOUT_SIZE (4 * 256) |
40 | #define GRAPH_CHUNKLOOKUP_WIDTH 12 | |
0e3b97cc | 41 | #define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \ |
c1665998 | 42 | + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) |
08fd81c9 | 43 | |
2a2e32bd | 44 | char *get_commit_graph_filename(const char *obj_dir) |
08fd81c9 DS |
45 | { |
46 | return xstrfmt("%s/info/commit-graph", obj_dir); | |
47 | } | |
48 | ||
5c84b339 DS |
49 | static char *get_split_graph_filename(const char *obj_dir, |
50 | const char *oid_hex) | |
51 | { | |
52 | return xstrfmt("%s/info/commit-graphs/graph-%s.graph", | |
53 | obj_dir, | |
54 | oid_hex); | |
55 | } | |
56 | ||
57 | static char *get_chain_filename(const char *obj_dir) | |
58 | { | |
59 | return xstrfmt("%s/info/commit-graphs/commit-graph-chain", obj_dir); | |
60 | } | |
61 | ||
c1665998 | 62 | static uint8_t oid_version(void) |
63 | { | |
64 | return 1; | |
65 | } | |
66 | ||
2a2e32bd DS |
67 | static struct commit_graph *alloc_commit_graph(void) |
68 | { | |
69 | struct commit_graph *g = xcalloc(1, sizeof(*g)); | |
70 | g->graph_fd = -1; | |
71 | ||
72 | return g; | |
73 | } | |
74 | ||
d6538246 DS |
75 | extern int read_replace_refs; |
76 | ||
77 | static int commit_graph_compatible(struct repository *r) | |
78 | { | |
5cef295f DS |
79 | if (!r->gitdir) |
80 | return 0; | |
81 | ||
d6538246 DS |
82 | if (read_replace_refs) { |
83 | prepare_replace_object(r); | |
84 | if (hashmap_get_size(&r->objects->replace_map->map)) | |
85 | return 0; | |
86 | } | |
87 | ||
20fd6d57 DS |
88 | prepare_commit_graft(r); |
89 | if (r->parsed_objects && r->parsed_objects->grafts_nr) | |
90 | return 0; | |
91 | if (is_repository_shallow(r)) | |
92 | return 0; | |
93 | ||
d6538246 DS |
94 | return 1; |
95 | } | |
96 | ||
61df89c8 ÆAB |
97 | int open_commit_graph(const char *graph_file, int *fd, struct stat *st) |
98 | { | |
99 | *fd = git_open(graph_file); | |
100 | if (*fd < 0) | |
101 | return 0; | |
102 | if (fstat(*fd, st)) { | |
103 | close(*fd); | |
104 | return 0; | |
105 | } | |
106 | return 1; | |
107 | } | |
108 | ||
67a530fa | 109 | struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st) |
2a2e32bd DS |
110 | { |
111 | void *graph_map; | |
2a2e32bd | 112 | size_t graph_size; |
aa658574 | 113 | struct commit_graph *ret; |
2a2e32bd | 114 | |
61df89c8 | 115 | graph_size = xsize_t(st->st_size); |
2a2e32bd DS |
116 | |
117 | if (graph_size < GRAPH_MIN_SIZE) { | |
118 | close(fd); | |
67a530fa | 119 | error(_("commit-graph file is too small")); |
61df89c8 | 120 | return NULL; |
2a2e32bd DS |
121 | } |
122 | graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
aa658574 JS |
123 | ret = parse_commit_graph(graph_map, fd, graph_size); |
124 | ||
125 | if (!ret) { | |
126 | munmap(graph_map, graph_size); | |
127 | close(fd); | |
aa658574 JS |
128 | } |
129 | ||
130 | return ret; | |
131 | } | |
132 | ||
2ac138d5 ÆAB |
133 | static int verify_commit_graph_lite(struct commit_graph *g) |
134 | { | |
135 | /* | |
136 | * Basic validation shared between parse_commit_graph() | |
137 | * which'll be called every time the graph is used, and the | |
138 | * much more expensive verify_commit_graph() used by | |
139 | * "commit-graph verify". | |
140 | * | |
141 | * There should only be very basic checks here to ensure that | |
142 | * we don't e.g. segfault in fill_commit_in_graph(), but | |
143 | * because this is a very hot codepath nothing that e.g. loops | |
144 | * over g->num_commits, or runs a checksum on the commit-graph | |
145 | * itself. | |
146 | */ | |
147 | if (!g->chunk_oid_fanout) { | |
148 | error("commit-graph is missing the OID Fanout chunk"); | |
149 | return 1; | |
150 | } | |
151 | if (!g->chunk_oid_lookup) { | |
152 | error("commit-graph is missing the OID Lookup chunk"); | |
153 | return 1; | |
154 | } | |
155 | if (!g->chunk_commit_data) { | |
156 | error("commit-graph is missing the Commit Data chunk"); | |
157 | return 1; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
aa658574 JS |
163 | struct commit_graph *parse_commit_graph(void *graph_map, int fd, |
164 | size_t graph_size) | |
165 | { | |
166 | const unsigned char *data, *chunk_lookup; | |
167 | uint32_t i; | |
168 | struct commit_graph *graph; | |
169 | uint64_t last_chunk_offset; | |
170 | uint32_t last_chunk_id; | |
171 | uint32_t graph_signature; | |
172 | unsigned char graph_version, hash_version; | |
173 | ||
174 | if (!graph_map) | |
175 | return NULL; | |
176 | ||
177 | if (graph_size < GRAPH_MIN_SIZE) | |
178 | return NULL; | |
179 | ||
2a2e32bd DS |
180 | data = (const unsigned char *)graph_map; |
181 | ||
182 | graph_signature = get_be32(data); | |
183 | if (graph_signature != GRAPH_SIGNATURE) { | |
93b4405f | 184 | error(_("commit-graph signature %X does not match signature %X"), |
2a2e32bd | 185 | graph_signature, GRAPH_SIGNATURE); |
aa658574 | 186 | return NULL; |
2a2e32bd DS |
187 | } |
188 | ||
189 | graph_version = *(unsigned char*)(data + 4); | |
190 | if (graph_version != GRAPH_VERSION) { | |
93b4405f | 191 | error(_("commit-graph version %X does not match version %X"), |
2a2e32bd | 192 | graph_version, GRAPH_VERSION); |
aa658574 | 193 | return NULL; |
2a2e32bd DS |
194 | } |
195 | ||
196 | hash_version = *(unsigned char*)(data + 5); | |
c1665998 | 197 | if (hash_version != oid_version()) { |
93b4405f | 198 | error(_("commit-graph hash version %X does not match version %X"), |
c1665998 | 199 | hash_version, oid_version()); |
aa658574 | 200 | return NULL; |
2a2e32bd DS |
201 | } |
202 | ||
203 | graph = alloc_commit_graph(); | |
204 | ||
c1665998 | 205 | graph->hash_len = the_hash_algo->rawsz; |
2a2e32bd DS |
206 | graph->num_chunks = *(unsigned char*)(data + 6); |
207 | graph->graph_fd = fd; | |
208 | graph->data = graph_map; | |
209 | graph->data_len = graph_size; | |
210 | ||
211 | last_chunk_id = 0; | |
212 | last_chunk_offset = 8; | |
213 | chunk_lookup = data + 8; | |
214 | for (i = 0; i < graph->num_chunks; i++) { | |
d2b86fba JS |
215 | uint32_t chunk_id; |
216 | uint64_t chunk_offset; | |
2a2e32bd DS |
217 | int chunk_repeated = 0; |
218 | ||
d2b86fba JS |
219 | if (data + graph_size - chunk_lookup < |
220 | GRAPH_CHUNKLOOKUP_WIDTH) { | |
93b4405f | 221 | error(_("commit-graph chunk lookup table entry missing; file may be incomplete")); |
d2b86fba JS |
222 | free(graph); |
223 | return NULL; | |
224 | } | |
225 | ||
226 | chunk_id = get_be32(chunk_lookup + 0); | |
227 | chunk_offset = get_be64(chunk_lookup + 4); | |
228 | ||
2a2e32bd DS |
229 | chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH; |
230 | ||
c1665998 | 231 | if (chunk_offset > graph_size - the_hash_algo->rawsz) { |
93b4405f | 232 | error(_("commit-graph improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32), |
2a2e32bd | 233 | (uint32_t)chunk_offset); |
aa658574 JS |
234 | free(graph); |
235 | return NULL; | |
2a2e32bd DS |
236 | } |
237 | ||
238 | switch (chunk_id) { | |
239 | case GRAPH_CHUNKID_OIDFANOUT: | |
240 | if (graph->chunk_oid_fanout) | |
241 | chunk_repeated = 1; | |
242 | else | |
243 | graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset); | |
244 | break; | |
245 | ||
246 | case GRAPH_CHUNKID_OIDLOOKUP: | |
247 | if (graph->chunk_oid_lookup) | |
248 | chunk_repeated = 1; | |
249 | else | |
250 | graph->chunk_oid_lookup = data + chunk_offset; | |
251 | break; | |
252 | ||
253 | case GRAPH_CHUNKID_DATA: | |
254 | if (graph->chunk_commit_data) | |
255 | chunk_repeated = 1; | |
256 | else | |
257 | graph->chunk_commit_data = data + chunk_offset; | |
258 | break; | |
259 | ||
5af7417b SG |
260 | case GRAPH_CHUNKID_EXTRAEDGES: |
261 | if (graph->chunk_extra_edges) | |
2a2e32bd DS |
262 | chunk_repeated = 1; |
263 | else | |
5af7417b | 264 | graph->chunk_extra_edges = data + chunk_offset; |
2a2e32bd | 265 | break; |
118bd570 DS |
266 | |
267 | case GRAPH_CHUNKID_BASE: | |
268 | if (graph->chunk_base_graphs) | |
269 | chunk_repeated = 1; | |
270 | else | |
271 | graph->chunk_base_graphs = data + chunk_offset; | |
2a2e32bd DS |
272 | } |
273 | ||
274 | if (chunk_repeated) { | |
93b4405f | 275 | error(_("commit-graph chunk id %08x appears multiple times"), chunk_id); |
aa658574 JS |
276 | free(graph); |
277 | return NULL; | |
2a2e32bd DS |
278 | } |
279 | ||
280 | if (last_chunk_id == GRAPH_CHUNKID_OIDLOOKUP) | |
281 | { | |
282 | graph->num_commits = (chunk_offset - last_chunk_offset) | |
283 | / graph->hash_len; | |
284 | } | |
285 | ||
286 | last_chunk_id = chunk_id; | |
287 | last_chunk_offset = chunk_offset; | |
288 | } | |
289 | ||
118bd570 DS |
290 | hashcpy(graph->oid.hash, graph->data + graph->data_len - graph->hash_len); |
291 | ||
2ac138d5 ÆAB |
292 | if (verify_commit_graph_lite(graph)) |
293 | return NULL; | |
294 | ||
2a2e32bd | 295 | return graph; |
2a2e32bd DS |
296 | } |
297 | ||
61df89c8 ÆAB |
298 | static struct commit_graph *load_commit_graph_one(const char *graph_file) |
299 | { | |
300 | ||
301 | struct stat st; | |
302 | int fd; | |
6c622f9f | 303 | struct commit_graph *g; |
61df89c8 ÆAB |
304 | int open_ok = open_commit_graph(graph_file, &fd, &st); |
305 | ||
306 | if (!open_ok) | |
307 | return NULL; | |
308 | ||
6c622f9f DS |
309 | g = load_commit_graph_one_fd_st(fd, &st); |
310 | ||
311 | if (g) | |
312 | g->filename = xstrdup(graph_file); | |
313 | ||
314 | return g; | |
61df89c8 ÆAB |
315 | } |
316 | ||
5c84b339 DS |
317 | static struct commit_graph *load_commit_graph_v1(struct repository *r, const char *obj_dir) |
318 | { | |
319 | char *graph_name = get_commit_graph_filename(obj_dir); | |
320 | struct commit_graph *g = load_commit_graph_one(graph_name); | |
321 | free(graph_name); | |
322 | ||
323 | return g; | |
324 | } | |
325 | ||
326 | static int add_graph_to_chain(struct commit_graph *g, | |
327 | struct commit_graph *chain, | |
328 | struct object_id *oids, | |
329 | int n) | |
330 | { | |
331 | struct commit_graph *cur_g = chain; | |
332 | ||
118bd570 DS |
333 | if (n && !g->chunk_base_graphs) { |
334 | warning(_("commit-graph has no base graphs chunk")); | |
335 | return 0; | |
336 | } | |
337 | ||
5c84b339 DS |
338 | while (n) { |
339 | n--; | |
118bd570 DS |
340 | |
341 | if (!cur_g || | |
342 | !oideq(&oids[n], &cur_g->oid) || | |
343 | !hasheq(oids[n].hash, g->chunk_base_graphs + g->hash_len * n)) { | |
344 | warning(_("commit-graph chain does not match")); | |
345 | return 0; | |
346 | } | |
347 | ||
5c84b339 DS |
348 | cur_g = cur_g->base_graph; |
349 | } | |
350 | ||
351 | g->base_graph = chain; | |
352 | ||
353 | if (chain) | |
354 | g->num_commits_in_base = chain->num_commits + chain->num_commits_in_base; | |
355 | ||
356 | return 1; | |
357 | } | |
358 | ||
359 | static struct commit_graph *load_commit_graph_chain(struct repository *r, const char *obj_dir) | |
360 | { | |
361 | struct commit_graph *graph_chain = NULL; | |
362 | struct strbuf line = STRBUF_INIT; | |
363 | struct stat st; | |
364 | struct object_id *oids; | |
365 | int i = 0, valid = 1, count; | |
366 | char *chain_name = get_chain_filename(obj_dir); | |
367 | FILE *fp; | |
368 | int stat_res; | |
369 | ||
370 | fp = fopen(chain_name, "r"); | |
371 | stat_res = stat(chain_name, &st); | |
372 | free(chain_name); | |
373 | ||
374 | if (!fp || | |
375 | stat_res || | |
376 | st.st_size <= the_hash_algo->hexsz) | |
377 | return NULL; | |
378 | ||
379 | count = st.st_size / (the_hash_algo->hexsz + 1); | |
380 | oids = xcalloc(count, sizeof(struct object_id)); | |
381 | ||
382 | for (i = 0; i < count && valid; i++) { | |
383 | char *graph_name; | |
384 | struct commit_graph *g; | |
385 | ||
386 | if (strbuf_getline_lf(&line, fp) == EOF) | |
387 | break; | |
388 | ||
389 | if (get_oid_hex(line.buf, &oids[i])) { | |
390 | warning(_("invalid commit-graph chain: line '%s' not a hash"), | |
391 | line.buf); | |
392 | valid = 0; | |
393 | break; | |
394 | } | |
395 | ||
396 | graph_name = get_split_graph_filename(obj_dir, line.buf); | |
397 | g = load_commit_graph_one(graph_name); | |
398 | free(graph_name); | |
399 | ||
400 | if (g && add_graph_to_chain(g, graph_chain, oids, i)) | |
401 | graph_chain = g; | |
402 | else | |
403 | valid = 0; | |
404 | } | |
405 | ||
406 | free(oids); | |
407 | fclose(fp); | |
408 | ||
409 | return graph_chain; | |
410 | } | |
411 | ||
412 | static struct commit_graph *read_commit_graph_one(struct repository *r, const char *obj_dir) | |
413 | { | |
414 | struct commit_graph *g = load_commit_graph_v1(r, obj_dir); | |
415 | ||
416 | if (!g) | |
417 | g = load_commit_graph_chain(r, obj_dir); | |
418 | ||
419 | return g; | |
420 | } | |
421 | ||
dade47c0 | 422 | static void prepare_commit_graph_one(struct repository *r, const char *obj_dir) |
177722b3 | 423 | { |
177722b3 | 424 | |
dade47c0 | 425 | if (r->objects->commit_graph) |
177722b3 DS |
426 | return; |
427 | ||
5c84b339 | 428 | r->objects->commit_graph = read_commit_graph_one(r, obj_dir); |
177722b3 DS |
429 | } |
430 | ||
5faf357b JT |
431 | /* |
432 | * Return 1 if commit_graph is non-NULL, and 0 otherwise. | |
433 | * | |
434 | * On the first invocation, this function attemps to load the commit | |
435 | * graph if the_repository is configured to have one. | |
436 | */ | |
dade47c0 | 437 | static int prepare_commit_graph(struct repository *r) |
177722b3 | 438 | { |
263db403 | 439 | struct object_directory *odb; |
dade47c0 JT |
440 | int config_value; |
441 | ||
43d35618 ÆAB |
442 | if (git_env_bool(GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD, 0)) |
443 | die("dying as requested by the '%s' variable on commit-graph load!", | |
444 | GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD); | |
445 | ||
dade47c0 JT |
446 | if (r->objects->commit_graph_attempted) |
447 | return !!r->objects->commit_graph; | |
448 | r->objects->commit_graph_attempted = 1; | |
449 | ||
859fdc0c DS |
450 | if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && |
451 | (repo_config_get_bool(r, "core.commitgraph", &config_value) || | |
452 | !config_value)) | |
dade47c0 JT |
453 | /* |
454 | * This repository is not configured to use commit graphs, so | |
455 | * do not load one. (But report commit_graph_attempted anyway | |
456 | * so that commit graph loading is not attempted again for this | |
457 | * repository.) | |
458 | */ | |
5faf357b JT |
459 | return 0; |
460 | ||
d6538246 DS |
461 | if (!commit_graph_compatible(r)) |
462 | return 0; | |
463 | ||
dade47c0 | 464 | prepare_alt_odb(r); |
f0eaf638 | 465 | for (odb = r->objects->odb; |
263db403 JK |
466 | !r->objects->commit_graph && odb; |
467 | odb = odb->next) | |
468 | prepare_commit_graph_one(r, odb->path); | |
dade47c0 | 469 | return !!r->objects->commit_graph; |
177722b3 DS |
470 | } |
471 | ||
6cc01743 DS |
472 | int generation_numbers_enabled(struct repository *r) |
473 | { | |
474 | uint32_t first_generation; | |
475 | struct commit_graph *g; | |
476 | if (!prepare_commit_graph(r)) | |
477 | return 0; | |
478 | ||
479 | g = r->objects->commit_graph; | |
480 | ||
481 | if (!g->num_commits) | |
482 | return 0; | |
483 | ||
484 | first_generation = get_be32(g->chunk_commit_data + | |
485 | g->hash_len + 8) >> 2; | |
486 | ||
487 | return !!first_generation; | |
488 | } | |
489 | ||
d4f4d60f DS |
490 | static void close_commit_graph_one(struct commit_graph *g) |
491 | { | |
492 | if (!g) | |
493 | return; | |
494 | ||
495 | close_commit_graph_one(g->base_graph); | |
496 | free_commit_graph(g); | |
497 | } | |
498 | ||
c3a3a964 | 499 | void close_commit_graph(struct raw_object_store *o) |
177722b3 | 500 | { |
d4f4d60f | 501 | close_commit_graph_one(o->commit_graph); |
c3a3a964 | 502 | o->commit_graph = NULL; |
177722b3 DS |
503 | } |
504 | ||
505 | static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos) | |
506 | { | |
507 | return bsearch_hash(oid->hash, g->chunk_oid_fanout, | |
508 | g->chunk_oid_lookup, g->hash_len, pos); | |
509 | } | |
510 | ||
d4f4d60f DS |
511 | static void load_oid_from_graph(struct commit_graph *g, |
512 | uint32_t pos, | |
513 | struct object_id *oid) | |
514 | { | |
515 | uint32_t lex_index; | |
516 | ||
517 | while (g && pos < g->num_commits_in_base) | |
518 | g = g->base_graph; | |
519 | ||
520 | if (!g) | |
521 | BUG("NULL commit-graph"); | |
522 | ||
523 | if (pos >= g->num_commits + g->num_commits_in_base) | |
524 | die(_("invalid commit position. commit-graph is likely corrupt")); | |
525 | ||
526 | lex_index = pos - g->num_commits_in_base; | |
527 | ||
528 | hashcpy(oid->hash, g->chunk_oid_lookup + g->hash_len * lex_index); | |
529 | } | |
530 | ||
4f542b7a SB |
531 | static struct commit_list **insert_parent_or_die(struct repository *r, |
532 | struct commit_graph *g, | |
d4f4d60f | 533 | uint32_t pos, |
177722b3 DS |
534 | struct commit_list **pptr) |
535 | { | |
536 | struct commit *c; | |
537 | struct object_id oid; | |
96af91d4 | 538 | |
d4f4d60f DS |
539 | if (pos >= g->num_commits + g->num_commits_in_base) |
540 | die("invalid parent position %"PRIu32, pos); | |
53614b13 | 541 | |
d4f4d60f | 542 | load_oid_from_graph(g, pos, &oid); |
4f542b7a | 543 | c = lookup_commit(r, &oid); |
177722b3 | 544 | if (!c) |
4f5b532d | 545 | die(_("could not find commit %s"), oid_to_hex(&oid)); |
177722b3 DS |
546 | c->graph_pos = pos; |
547 | return &commit_list_insert(c, pptr)->next; | |
548 | } | |
549 | ||
e2838d85 DS |
550 | static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos) |
551 | { | |
d4f4d60f DS |
552 | const unsigned char *commit_data; |
553 | uint32_t lex_index; | |
554 | ||
555 | while (pos < g->num_commits_in_base) | |
556 | g = g->base_graph; | |
557 | ||
558 | lex_index = pos - g->num_commits_in_base; | |
559 | commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * lex_index; | |
e2838d85 DS |
560 | item->graph_pos = pos; |
561 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; | |
562 | } | |
563 | ||
4f542b7a SB |
564 | static int fill_commit_in_graph(struct repository *r, |
565 | struct commit *item, | |
566 | struct commit_graph *g, uint32_t pos) | |
177722b3 | 567 | { |
177722b3 DS |
568 | uint32_t edge_value; |
569 | uint32_t *parent_data_ptr; | |
570 | uint64_t date_low, date_high; | |
571 | struct commit_list **pptr; | |
d4f4d60f DS |
572 | const unsigned char *commit_data; |
573 | uint32_t lex_index; | |
177722b3 | 574 | |
d4f4d60f DS |
575 | while (pos < g->num_commits_in_base) |
576 | g = g->base_graph; | |
577 | ||
578 | if (pos >= g->num_commits + g->num_commits_in_base) | |
579 | die(_("invalid commit position. commit-graph is likely corrupt")); | |
580 | ||
581 | /* | |
582 | * Store the "full" position, but then use the | |
583 | * "local" position for the rest of the calculation. | |
584 | */ | |
177722b3 | 585 | item->graph_pos = pos; |
d4f4d60f DS |
586 | lex_index = pos - g->num_commits_in_base; |
587 | ||
588 | commit_data = g->chunk_commit_data + (g->hash_len + 16) * lex_index; | |
589 | ||
590 | item->object.parsed = 1; | |
177722b3 | 591 | |
7b8a21db | 592 | item->maybe_tree = NULL; |
177722b3 DS |
593 | |
594 | date_high = get_be32(commit_data + g->hash_len + 8) & 0x3; | |
595 | date_low = get_be32(commit_data + g->hash_len + 12); | |
596 | item->date = (timestamp_t)((date_high << 32) | date_low); | |
597 | ||
83073cc9 DS |
598 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; |
599 | ||
177722b3 DS |
600 | pptr = &item->parents; |
601 | ||
602 | edge_value = get_be32(commit_data + g->hash_len); | |
603 | if (edge_value == GRAPH_PARENT_NONE) | |
604 | return 1; | |
4f542b7a | 605 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
606 | |
607 | edge_value = get_be32(commit_data + g->hash_len + 4); | |
608 | if (edge_value == GRAPH_PARENT_NONE) | |
609 | return 1; | |
5af7417b | 610 | if (!(edge_value & GRAPH_EXTRA_EDGES_NEEDED)) { |
4f542b7a | 611 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
612 | return 1; |
613 | } | |
614 | ||
5af7417b | 615 | parent_data_ptr = (uint32_t*)(g->chunk_extra_edges + |
177722b3 DS |
616 | 4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK)); |
617 | do { | |
618 | edge_value = get_be32(parent_data_ptr); | |
4f542b7a | 619 | pptr = insert_parent_or_die(r, g, |
177722b3 DS |
620 | edge_value & GRAPH_EDGE_LAST_MASK, |
621 | pptr); | |
622 | parent_data_ptr++; | |
623 | } while (!(edge_value & GRAPH_LAST_EDGE)); | |
624 | ||
625 | return 1; | |
626 | } | |
627 | ||
e2838d85 DS |
628 | static int find_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos) |
629 | { | |
630 | if (item->graph_pos != COMMIT_NOT_FROM_GRAPH) { | |
631 | *pos = item->graph_pos; | |
632 | return 1; | |
633 | } else { | |
d4f4d60f DS |
634 | struct commit_graph *cur_g = g; |
635 | uint32_t lex_index; | |
636 | ||
637 | while (cur_g && !bsearch_graph(cur_g, &(item->object.oid), &lex_index)) | |
638 | cur_g = cur_g->base_graph; | |
639 | ||
640 | if (cur_g) { | |
641 | *pos = lex_index + cur_g->num_commits_in_base; | |
642 | return 1; | |
643 | } | |
644 | ||
645 | return 0; | |
e2838d85 DS |
646 | } |
647 | } | |
648 | ||
4f542b7a SB |
649 | static int parse_commit_in_graph_one(struct repository *r, |
650 | struct commit_graph *g, | |
651 | struct commit *item) | |
177722b3 | 652 | { |
e2838d85 DS |
653 | uint32_t pos; |
654 | ||
177722b3 DS |
655 | if (item->object.parsed) |
656 | return 1; | |
ee797053 DS |
657 | |
658 | if (find_commit_in_graph(item, g, &pos)) | |
4f542b7a | 659 | return fill_commit_in_graph(r, item, g, pos); |
ee797053 DS |
660 | |
661 | return 0; | |
662 | } | |
663 | ||
dade47c0 | 664 | int parse_commit_in_graph(struct repository *r, struct commit *item) |
ee797053 | 665 | { |
dade47c0 | 666 | if (!prepare_commit_graph(r)) |
ee797053 | 667 | return 0; |
4f542b7a | 668 | return parse_commit_in_graph_one(r, r->objects->commit_graph, item); |
177722b3 DS |
669 | } |
670 | ||
dade47c0 | 671 | void load_commit_graph_info(struct repository *r, struct commit *item) |
e2838d85 DS |
672 | { |
673 | uint32_t pos; | |
dade47c0 | 674 | if (!prepare_commit_graph(r)) |
e2838d85 | 675 | return; |
dade47c0 JT |
676 | if (find_commit_in_graph(item, r->objects->commit_graph, &pos)) |
677 | fill_commit_graph_info(item, r->objects->commit_graph, pos); | |
e2838d85 DS |
678 | } |
679 | ||
4f542b7a SB |
680 | static struct tree *load_tree_for_commit(struct repository *r, |
681 | struct commit_graph *g, | |
682 | struct commit *c) | |
7b8a21db DS |
683 | { |
684 | struct object_id oid; | |
d4f4d60f DS |
685 | const unsigned char *commit_data; |
686 | ||
687 | while (c->graph_pos < g->num_commits_in_base) | |
688 | g = g->base_graph; | |
689 | ||
690 | commit_data = g->chunk_commit_data + | |
691 | GRAPH_DATA_WIDTH * (c->graph_pos - g->num_commits_in_base); | |
7b8a21db DS |
692 | |
693 | hashcpy(oid.hash, commit_data); | |
4f542b7a | 694 | c->maybe_tree = lookup_tree(r, &oid); |
7b8a21db DS |
695 | |
696 | return c->maybe_tree; | |
697 | } | |
698 | ||
4f542b7a SB |
699 | static struct tree *get_commit_tree_in_graph_one(struct repository *r, |
700 | struct commit_graph *g, | |
0cbef8f8 | 701 | const struct commit *c) |
7b8a21db DS |
702 | { |
703 | if (c->maybe_tree) | |
704 | return c->maybe_tree; | |
705 | if (c->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
0cbef8f8 DS |
706 | BUG("get_commit_tree_in_graph_one called from non-commit-graph commit"); |
707 | ||
4f542b7a | 708 | return load_tree_for_commit(r, g, (struct commit *)c); |
0cbef8f8 | 709 | } |
7b8a21db | 710 | |
dade47c0 | 711 | struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c) |
0cbef8f8 | 712 | { |
4f542b7a | 713 | return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c); |
7b8a21db DS |
714 | } |
715 | ||
c9905bea DS |
716 | struct packed_commit_list { |
717 | struct commit **list; | |
718 | int nr; | |
719 | int alloc; | |
720 | }; | |
721 | ||
722 | struct packed_oid_list { | |
723 | struct object_id *list; | |
724 | int nr; | |
725 | int alloc; | |
726 | }; | |
727 | ||
728 | struct write_commit_graph_context { | |
729 | struct repository *r; | |
730 | const char *obj_dir; | |
731 | char *graph_name; | |
732 | struct packed_oid_list oids; | |
733 | struct packed_commit_list commits; | |
734 | int num_extra_edges; | |
735 | unsigned long approx_nr_objects; | |
736 | struct progress *progress; | |
737 | int progress_done; | |
738 | uint64_t progress_cnt; | |
6c622f9f DS |
739 | |
740 | char *base_graph_name; | |
741 | int num_commit_graphs_before; | |
742 | int num_commit_graphs_after; | |
743 | char **commit_graph_filenames_before; | |
744 | char **commit_graph_filenames_after; | |
745 | char **commit_graph_hash_after; | |
746 | uint32_t new_num_commits_in_base; | |
747 | struct commit_graph *new_base_graph; | |
748 | ||
c9905bea | 749 | unsigned append:1, |
6c622f9f DS |
750 | report_progress:1, |
751 | split:1; | |
c9905bea DS |
752 | }; |
753 | ||
08fd81c9 | 754 | static void write_graph_chunk_fanout(struct hashfile *f, |
c9905bea | 755 | struct write_commit_graph_context *ctx) |
08fd81c9 DS |
756 | { |
757 | int i, count = 0; | |
c9905bea | 758 | struct commit **list = ctx->commits.list; |
08fd81c9 DS |
759 | |
760 | /* | |
761 | * Write the first-level table (the list is sorted, | |
762 | * but we use a 256-entry lookup to be able to avoid | |
763 | * having to do eight extra binary search iterations). | |
764 | */ | |
765 | for (i = 0; i < 256; i++) { | |
c9905bea | 766 | while (count < ctx->commits.nr) { |
08fd81c9 DS |
767 | if ((*list)->object.oid.hash[0] != i) |
768 | break; | |
c9905bea | 769 | display_progress(ctx->progress, ++ctx->progress_cnt); |
08fd81c9 DS |
770 | count++; |
771 | list++; | |
772 | } | |
773 | ||
774 | hashwrite_be32(f, count); | |
775 | } | |
776 | } | |
777 | ||
778 | static void write_graph_chunk_oids(struct hashfile *f, int hash_len, | |
c9905bea | 779 | struct write_commit_graph_context *ctx) |
08fd81c9 | 780 | { |
c9905bea | 781 | struct commit **list = ctx->commits.list; |
08fd81c9 | 782 | int count; |
c9905bea DS |
783 | for (count = 0; count < ctx->commits.nr; count++, list++) { |
784 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
08fd81c9 | 785 | hashwrite(f, (*list)->object.oid.hash, (int)hash_len); |
53035c4f | 786 | } |
08fd81c9 DS |
787 | } |
788 | ||
789 | static const unsigned char *commit_to_sha1(size_t index, void *table) | |
790 | { | |
791 | struct commit **commits = table; | |
792 | return commits[index]->object.oid.hash; | |
793 | } | |
794 | ||
795 | static void write_graph_chunk_data(struct hashfile *f, int hash_len, | |
c9905bea | 796 | struct write_commit_graph_context *ctx) |
08fd81c9 | 797 | { |
c9905bea DS |
798 | struct commit **list = ctx->commits.list; |
799 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
08fd81c9 DS |
800 | uint32_t num_extra_edges = 0; |
801 | ||
802 | while (list < last) { | |
803 | struct commit_list *parent; | |
804 | int edge_value; | |
805 | uint32_t packedDate[2]; | |
c9905bea | 806 | display_progress(ctx->progress, ++ctx->progress_cnt); |
08fd81c9 | 807 | |
43d35618 | 808 | parse_commit_no_graph(*list); |
2e27bd77 | 809 | hashwrite(f, get_commit_tree_oid(*list)->hash, hash_len); |
08fd81c9 DS |
810 | |
811 | parent = (*list)->parents; | |
812 | ||
813 | if (!parent) | |
814 | edge_value = GRAPH_PARENT_NONE; | |
815 | else { | |
816 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
c9905bea DS |
817 | ctx->commits.list, |
818 | ctx->commits.nr, | |
08fd81c9 DS |
819 | commit_to_sha1); |
820 | ||
6c622f9f DS |
821 | if (edge_value >= 0) |
822 | edge_value += ctx->new_num_commits_in_base; | |
823 | else { | |
824 | uint32_t pos; | |
825 | if (find_commit_in_graph(parent->item, | |
826 | ctx->new_base_graph, | |
827 | &pos)) | |
828 | edge_value = pos; | |
829 | } | |
830 | ||
08fd81c9 | 831 | if (edge_value < 0) |
cce99cd8 DS |
832 | BUG("missing parent %s for commit %s", |
833 | oid_to_hex(&parent->item->object.oid), | |
834 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
835 | } |
836 | ||
837 | hashwrite_be32(f, edge_value); | |
838 | ||
839 | if (parent) | |
840 | parent = parent->next; | |
841 | ||
842 | if (!parent) | |
843 | edge_value = GRAPH_PARENT_NONE; | |
844 | else if (parent->next) | |
5af7417b | 845 | edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges; |
08fd81c9 DS |
846 | else { |
847 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
c9905bea DS |
848 | ctx->commits.list, |
849 | ctx->commits.nr, | |
08fd81c9 | 850 | commit_to_sha1); |
6c622f9f DS |
851 | |
852 | if (edge_value >= 0) | |
853 | edge_value += ctx->new_num_commits_in_base; | |
854 | else { | |
855 | uint32_t pos; | |
856 | if (find_commit_in_graph(parent->item, | |
857 | ctx->new_base_graph, | |
858 | &pos)) | |
859 | edge_value = pos; | |
860 | } | |
861 | ||
08fd81c9 | 862 | if (edge_value < 0) |
cce99cd8 DS |
863 | BUG("missing parent %s for commit %s", |
864 | oid_to_hex(&parent->item->object.oid), | |
865 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
866 | } |
867 | ||
868 | hashwrite_be32(f, edge_value); | |
869 | ||
5af7417b | 870 | if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) { |
08fd81c9 DS |
871 | do { |
872 | num_extra_edges++; | |
873 | parent = parent->next; | |
874 | } while (parent); | |
875 | } | |
876 | ||
877 | if (sizeof((*list)->date) > 4) | |
878 | packedDate[0] = htonl(((*list)->date >> 32) & 0x3); | |
879 | else | |
880 | packedDate[0] = 0; | |
881 | ||
3258c663 DS |
882 | packedDate[0] |= htonl((*list)->generation << 2); |
883 | ||
08fd81c9 DS |
884 | packedDate[1] = htonl((*list)->date); |
885 | hashwrite(f, packedDate, 8); | |
886 | ||
887 | list++; | |
888 | } | |
889 | } | |
890 | ||
5af7417b | 891 | static void write_graph_chunk_extra_edges(struct hashfile *f, |
c9905bea | 892 | struct write_commit_graph_context *ctx) |
08fd81c9 | 893 | { |
c9905bea DS |
894 | struct commit **list = ctx->commits.list; |
895 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
08fd81c9 DS |
896 | struct commit_list *parent; |
897 | ||
898 | while (list < last) { | |
899 | int num_parents = 0; | |
53035c4f | 900 | |
c9905bea | 901 | display_progress(ctx->progress, ++ctx->progress_cnt); |
53035c4f | 902 | |
08fd81c9 DS |
903 | for (parent = (*list)->parents; num_parents < 3 && parent; |
904 | parent = parent->next) | |
905 | num_parents++; | |
906 | ||
907 | if (num_parents <= 2) { | |
908 | list++; | |
909 | continue; | |
910 | } | |
911 | ||
912 | /* Since num_parents > 2, this initializer is safe. */ | |
913 | for (parent = (*list)->parents->next; parent; parent = parent->next) { | |
914 | int edge_value = sha1_pos(parent->item->object.oid.hash, | |
c9905bea DS |
915 | ctx->commits.list, |
916 | ctx->commits.nr, | |
08fd81c9 DS |
917 | commit_to_sha1); |
918 | ||
6c622f9f DS |
919 | if (edge_value >= 0) |
920 | edge_value += ctx->new_num_commits_in_base; | |
921 | else { | |
922 | uint32_t pos; | |
923 | if (find_commit_in_graph(parent->item, | |
924 | ctx->new_base_graph, | |
925 | &pos)) | |
926 | edge_value = pos; | |
927 | } | |
928 | ||
08fd81c9 | 929 | if (edge_value < 0) |
cce99cd8 DS |
930 | BUG("missing parent %s for commit %s", |
931 | oid_to_hex(&parent->item->object.oid), | |
932 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
933 | else if (!parent->next) |
934 | edge_value |= GRAPH_LAST_EDGE; | |
935 | ||
936 | hashwrite_be32(f, edge_value); | |
937 | } | |
938 | ||
939 | list++; | |
940 | } | |
941 | } | |
942 | ||
3cbc6ed3 | 943 | static int oid_compare(const void *_a, const void *_b) |
08fd81c9 DS |
944 | { |
945 | const struct object_id *a = (const struct object_id *)_a; | |
946 | const struct object_id *b = (const struct object_id *)_b; | |
947 | return oidcmp(a, b); | |
948 | } | |
949 | ||
08fd81c9 DS |
950 | static int add_packed_commits(const struct object_id *oid, |
951 | struct packed_git *pack, | |
952 | uint32_t pos, | |
953 | void *data) | |
954 | { | |
c9905bea | 955 | struct write_commit_graph_context *ctx = (struct write_commit_graph_context*)data; |
08fd81c9 DS |
956 | enum object_type type; |
957 | off_t offset = nth_packed_object_offset(pack, pos); | |
958 | struct object_info oi = OBJECT_INFO_INIT; | |
959 | ||
c9905bea DS |
960 | if (ctx->progress) |
961 | display_progress(ctx->progress, ++ctx->progress_done); | |
7b0f2292 | 962 | |
08fd81c9 | 963 | oi.typep = &type; |
c9905bea | 964 | if (packed_object_info(ctx->r, pack, offset, &oi) < 0) |
4f5b532d | 965 | die(_("unable to get type of object %s"), oid_to_hex(oid)); |
08fd81c9 DS |
966 | |
967 | if (type != OBJ_COMMIT) | |
968 | return 0; | |
969 | ||
c9905bea DS |
970 | ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); |
971 | oidcpy(&(ctx->oids.list[ctx->oids.nr]), oid); | |
972 | ctx->oids.nr++; | |
08fd81c9 DS |
973 | |
974 | return 0; | |
975 | } | |
976 | ||
c9905bea | 977 | static void add_missing_parents(struct write_commit_graph_context *ctx, struct commit *commit) |
4f2542b4 DS |
978 | { |
979 | struct commit_list *parent; | |
980 | for (parent = commit->parents; parent; parent = parent->next) { | |
981 | if (!(parent->item->object.flags & UNINTERESTING)) { | |
c9905bea DS |
982 | ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); |
983 | oidcpy(&ctx->oids.list[ctx->oids.nr], &(parent->item->object.oid)); | |
984 | ctx->oids.nr++; | |
4f2542b4 DS |
985 | parent->item->object.flags |= UNINTERESTING; |
986 | } | |
987 | } | |
988 | } | |
989 | ||
c9905bea | 990 | static void close_reachable(struct write_commit_graph_context *ctx) |
4f2542b4 | 991 | { |
49bbc57a | 992 | int i; |
4f2542b4 DS |
993 | struct commit *commit; |
994 | ||
c9905bea DS |
995 | if (ctx->report_progress) |
996 | ctx->progress = start_delayed_progress( | |
997 | _("Loading known commits in commit graph"), | |
998 | ctx->oids.nr); | |
999 | for (i = 0; i < ctx->oids.nr; i++) { | |
1000 | display_progress(ctx->progress, i + 1); | |
1001 | commit = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
4f2542b4 DS |
1002 | if (commit) |
1003 | commit->object.flags |= UNINTERESTING; | |
1004 | } | |
c9905bea | 1005 | stop_progress(&ctx->progress); |
4f2542b4 DS |
1006 | |
1007 | /* | |
c9905bea | 1008 | * As this loop runs, ctx->oids.nr may grow, but not more |
4f2542b4 DS |
1009 | * than the number of missing commits in the reachable |
1010 | * closure. | |
1011 | */ | |
c9905bea DS |
1012 | if (ctx->report_progress) |
1013 | ctx->progress = start_delayed_progress( | |
1014 | _("Expanding reachable commits in commit graph"), | |
1015 | ctx->oids.nr); | |
1016 | for (i = 0; i < ctx->oids.nr; i++) { | |
1017 | display_progress(ctx->progress, i + 1); | |
1018 | commit = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
4f2542b4 | 1019 | |
6c622f9f DS |
1020 | if (!commit) |
1021 | continue; | |
1022 | if (ctx->split) { | |
1023 | if (!parse_commit(commit) && | |
1024 | commit->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
1025 | add_missing_parents(ctx, commit); | |
1026 | } else if (!parse_commit_no_graph(commit)) | |
c9905bea | 1027 | add_missing_parents(ctx, commit); |
4f2542b4 | 1028 | } |
c9905bea | 1029 | stop_progress(&ctx->progress); |
4f2542b4 | 1030 | |
c9905bea DS |
1031 | if (ctx->report_progress) |
1032 | ctx->progress = start_delayed_progress( | |
1033 | _("Clearing commit marks in commit graph"), | |
1034 | ctx->oids.nr); | |
1035 | for (i = 0; i < ctx->oids.nr; i++) { | |
1036 | display_progress(ctx->progress, i + 1); | |
1037 | commit = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
4f2542b4 DS |
1038 | |
1039 | if (commit) | |
1040 | commit->object.flags &= ~UNINTERESTING; | |
1041 | } | |
c9905bea | 1042 | stop_progress(&ctx->progress); |
4f2542b4 DS |
1043 | } |
1044 | ||
c9905bea | 1045 | static void compute_generation_numbers(struct write_commit_graph_context *ctx) |
3258c663 DS |
1046 | { |
1047 | int i; | |
1048 | struct commit_list *list = NULL; | |
1049 | ||
c9905bea DS |
1050 | if (ctx->report_progress) |
1051 | ctx->progress = start_progress( | |
1052 | _("Computing commit graph generation numbers"), | |
1053 | ctx->commits.nr); | |
1054 | for (i = 0; i < ctx->commits.nr; i++) { | |
1055 | display_progress(ctx->progress, i + 1); | |
1056 | if (ctx->commits.list[i]->generation != GENERATION_NUMBER_INFINITY && | |
1057 | ctx->commits.list[i]->generation != GENERATION_NUMBER_ZERO) | |
3258c663 DS |
1058 | continue; |
1059 | ||
c9905bea | 1060 | commit_list_insert(ctx->commits.list[i], &list); |
3258c663 DS |
1061 | while (list) { |
1062 | struct commit *current = list->item; | |
1063 | struct commit_list *parent; | |
1064 | int all_parents_computed = 1; | |
1065 | uint32_t max_generation = 0; | |
1066 | ||
1067 | for (parent = current->parents; parent; parent = parent->next) { | |
1068 | if (parent->item->generation == GENERATION_NUMBER_INFINITY || | |
1069 | parent->item->generation == GENERATION_NUMBER_ZERO) { | |
1070 | all_parents_computed = 0; | |
1071 | commit_list_insert(parent->item, &list); | |
1072 | break; | |
1073 | } else if (parent->item->generation > max_generation) { | |
1074 | max_generation = parent->item->generation; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | if (all_parents_computed) { | |
1079 | current->generation = max_generation + 1; | |
1080 | pop_commit(&list); | |
1081 | ||
1082 | if (current->generation > GENERATION_NUMBER_MAX) | |
1083 | current->generation = GENERATION_NUMBER_MAX; | |
1084 | } | |
1085 | } | |
1086 | } | |
c9905bea | 1087 | stop_progress(&ctx->progress); |
3258c663 DS |
1088 | } |
1089 | ||
59fb8770 DS |
1090 | static int add_ref_to_list(const char *refname, |
1091 | const struct object_id *oid, | |
1092 | int flags, void *cb_data) | |
1093 | { | |
1094 | struct string_list *list = (struct string_list *)cb_data; | |
1095 | ||
1096 | string_list_append(list, oid_to_hex(oid)); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
5af80394 | 1100 | int write_commit_graph_reachable(const char *obj_dir, unsigned int flags) |
59fb8770 | 1101 | { |
f4dbdfc4 | 1102 | struct string_list list = STRING_LIST_INIT_DUP; |
e103f727 | 1103 | int result; |
59fb8770 | 1104 | |
59fb8770 | 1105 | for_each_ref(add_ref_to_list, &list); |
e103f727 | 1106 | result = write_commit_graph(obj_dir, NULL, &list, |
5af80394 | 1107 | flags); |
f4dbdfc4 DS |
1108 | |
1109 | string_list_clear(&list, 0); | |
e103f727 | 1110 | return result; |
59fb8770 DS |
1111 | } |
1112 | ||
ef5b83f2 DS |
1113 | static int fill_oids_from_packs(struct write_commit_graph_context *ctx, |
1114 | struct string_list *pack_indexes) | |
1115 | { | |
1116 | uint32_t i; | |
1117 | struct strbuf progress_title = STRBUF_INIT; | |
1118 | struct strbuf packname = STRBUF_INIT; | |
1119 | int dirlen; | |
1120 | ||
1121 | strbuf_addf(&packname, "%s/pack/", ctx->obj_dir); | |
1122 | dirlen = packname.len; | |
1123 | if (ctx->report_progress) { | |
1124 | strbuf_addf(&progress_title, | |
1125 | Q_("Finding commits for commit graph in %d pack", | |
1126 | "Finding commits for commit graph in %d packs", | |
1127 | pack_indexes->nr), | |
1128 | pack_indexes->nr); | |
1129 | ctx->progress = start_delayed_progress(progress_title.buf, 0); | |
1130 | ctx->progress_done = 0; | |
1131 | } | |
1132 | for (i = 0; i < pack_indexes->nr; i++) { | |
1133 | struct packed_git *p; | |
1134 | strbuf_setlen(&packname, dirlen); | |
1135 | strbuf_addstr(&packname, pack_indexes->items[i].string); | |
1136 | p = add_packed_git(packname.buf, packname.len, 1); | |
1137 | if (!p) { | |
1138 | error(_("error adding pack %s"), packname.buf); | |
1139 | return -1; | |
1140 | } | |
1141 | if (open_pack_index(p)) { | |
1142 | error(_("error opening index for %s"), packname.buf); | |
1143 | return -1; | |
1144 | } | |
1145 | for_each_object_in_pack(p, add_packed_commits, ctx, | |
1146 | FOR_EACH_OBJECT_PACK_ORDER); | |
1147 | close_pack(p); | |
1148 | free(p); | |
1149 | } | |
1150 | ||
1151 | stop_progress(&ctx->progress); | |
1152 | strbuf_reset(&progress_title); | |
1153 | strbuf_release(&packname); | |
1154 | ||
1155 | return 0; | |
1156 | } | |
1157 | ||
4c9efe85 DS |
1158 | static void fill_oids_from_commit_hex(struct write_commit_graph_context *ctx, |
1159 | struct string_list *commit_hex) | |
1160 | { | |
1161 | uint32_t i; | |
1162 | struct strbuf progress_title = STRBUF_INIT; | |
1163 | ||
1164 | if (ctx->report_progress) { | |
1165 | strbuf_addf(&progress_title, | |
1166 | Q_("Finding commits for commit graph from %d ref", | |
1167 | "Finding commits for commit graph from %d refs", | |
1168 | commit_hex->nr), | |
1169 | commit_hex->nr); | |
1170 | ctx->progress = start_delayed_progress( | |
1171 | progress_title.buf, | |
1172 | commit_hex->nr); | |
1173 | } | |
1174 | for (i = 0; i < commit_hex->nr; i++) { | |
1175 | const char *end; | |
1176 | struct object_id oid; | |
1177 | struct commit *result; | |
1178 | ||
1179 | display_progress(ctx->progress, i + 1); | |
1180 | if (commit_hex->items[i].string && | |
1181 | parse_oid_hex(commit_hex->items[i].string, &oid, &end)) | |
1182 | continue; | |
1183 | ||
1184 | result = lookup_commit_reference_gently(ctx->r, &oid, 1); | |
1185 | ||
1186 | if (result) { | |
1187 | ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); | |
1188 | oidcpy(&ctx->oids.list[ctx->oids.nr], &(result->object.oid)); | |
1189 | ctx->oids.nr++; | |
1190 | } | |
1191 | } | |
1192 | stop_progress(&ctx->progress); | |
1193 | strbuf_release(&progress_title); | |
1194 | } | |
1195 | ||
b2c83060 DS |
1196 | static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx) |
1197 | { | |
1198 | if (ctx->report_progress) | |
1199 | ctx->progress = start_delayed_progress( | |
1200 | _("Finding commits for commit graph among packed objects"), | |
1201 | ctx->approx_nr_objects); | |
1202 | for_each_packed_object(add_packed_commits, ctx, | |
1203 | FOR_EACH_OBJECT_PACK_ORDER); | |
1204 | if (ctx->progress_done < ctx->approx_nr_objects) | |
1205 | display_progress(ctx->progress, ctx->approx_nr_objects); | |
1206 | stop_progress(&ctx->progress); | |
1207 | } | |
1208 | ||
014e3440 DS |
1209 | static uint32_t count_distinct_commits(struct write_commit_graph_context *ctx) |
1210 | { | |
1211 | uint32_t i, count_distinct = 1; | |
1212 | ||
1213 | if (ctx->report_progress) | |
1214 | ctx->progress = start_delayed_progress( | |
1215 | _("Counting distinct commits in commit graph"), | |
1216 | ctx->oids.nr); | |
1217 | display_progress(ctx->progress, 0); /* TODO: Measure QSORT() progress */ | |
3cbc6ed3 | 1218 | QSORT(ctx->oids.list, ctx->oids.nr, oid_compare); |
014e3440 DS |
1219 | |
1220 | for (i = 1; i < ctx->oids.nr; i++) { | |
1221 | display_progress(ctx->progress, i + 1); | |
6c622f9f DS |
1222 | if (!oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) { |
1223 | if (ctx->split) { | |
1224 | struct commit *c = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
1225 | ||
1226 | if (!c || c->graph_pos != COMMIT_NOT_FROM_GRAPH) | |
1227 | continue; | |
1228 | } | |
1229 | ||
014e3440 | 1230 | count_distinct++; |
6c622f9f | 1231 | } |
014e3440 DS |
1232 | } |
1233 | stop_progress(&ctx->progress); | |
1234 | ||
1235 | return count_distinct; | |
1236 | } | |
1237 | ||
f998d542 DS |
1238 | static void copy_oids_to_commits(struct write_commit_graph_context *ctx) |
1239 | { | |
1240 | uint32_t i; | |
1241 | struct commit_list *parent; | |
1242 | ||
1243 | ctx->num_extra_edges = 0; | |
1244 | if (ctx->report_progress) | |
1245 | ctx->progress = start_delayed_progress( | |
1246 | _("Finding extra edges in commit graph"), | |
1247 | ctx->oids.nr); | |
1248 | for (i = 0; i < ctx->oids.nr; i++) { | |
1249 | int num_parents = 0; | |
1250 | display_progress(ctx->progress, i + 1); | |
1251 | if (i > 0 && oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) | |
1252 | continue; | |
1253 | ||
6c622f9f | 1254 | ALLOC_GROW(ctx->commits.list, ctx->commits.nr + 1, ctx->commits.alloc); |
f998d542 | 1255 | ctx->commits.list[ctx->commits.nr] = lookup_commit(ctx->r, &ctx->oids.list[i]); |
6c622f9f DS |
1256 | |
1257 | if (ctx->split && | |
1258 | ctx->commits.list[ctx->commits.nr]->graph_pos != COMMIT_NOT_FROM_GRAPH) | |
1259 | continue; | |
1260 | ||
f998d542 DS |
1261 | parse_commit_no_graph(ctx->commits.list[ctx->commits.nr]); |
1262 | ||
1263 | for (parent = ctx->commits.list[ctx->commits.nr]->parents; | |
1264 | parent; parent = parent->next) | |
1265 | num_parents++; | |
1266 | ||
1267 | if (num_parents > 2) | |
1268 | ctx->num_extra_edges += num_parents - 1; | |
1269 | ||
1270 | ctx->commits.nr++; | |
1271 | } | |
1272 | stop_progress(&ctx->progress); | |
1273 | } | |
1274 | ||
6c622f9f DS |
1275 | static int write_graph_chunk_base_1(struct hashfile *f, |
1276 | struct commit_graph *g) | |
1277 | { | |
1278 | int num = 0; | |
1279 | ||
1280 | if (!g) | |
1281 | return 0; | |
1282 | ||
1283 | num = write_graph_chunk_base_1(f, g->base_graph); | |
1284 | hashwrite(f, g->oid.hash, the_hash_algo->rawsz); | |
1285 | return num + 1; | |
1286 | } | |
1287 | ||
1288 | static int write_graph_chunk_base(struct hashfile *f, | |
1289 | struct write_commit_graph_context *ctx) | |
1290 | { | |
1291 | int num = write_graph_chunk_base_1(f, ctx->new_base_graph); | |
1292 | ||
1293 | if (num != ctx->num_commit_graphs_after - 1) { | |
1294 | error(_("failed to write correct number of base graph ids")); | |
1295 | return -1; | |
1296 | } | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | ||
238def57 | 1301 | static int write_commit_graph_file(struct write_commit_graph_context *ctx) |
08fd81c9 | 1302 | { |
238def57 | 1303 | uint32_t i; |
6c622f9f | 1304 | int fd; |
08fd81c9 | 1305 | struct hashfile *f; |
08fd81c9 | 1306 | struct lock_file lk = LOCK_INIT; |
6c622f9f DS |
1307 | uint32_t chunk_ids[6]; |
1308 | uint64_t chunk_offsets[6]; | |
c1665998 | 1309 | const unsigned hashsz = the_hash_algo->rawsz; |
28944739 | 1310 | struct strbuf progress_title = STRBUF_INIT; |
144354b0 | 1311 | int num_chunks = 3; |
6c622f9f DS |
1312 | struct object_id file_hash; |
1313 | ||
1314 | if (ctx->split) { | |
1315 | struct strbuf tmp_file = STRBUF_INIT; | |
1316 | ||
1317 | strbuf_addf(&tmp_file, | |
1318 | "%s/info/commit-graphs/tmp_graph_XXXXXX", | |
1319 | ctx->obj_dir); | |
1320 | ctx->graph_name = strbuf_detach(&tmp_file, NULL); | |
1321 | } else { | |
1322 | ctx->graph_name = get_commit_graph_filename(ctx->obj_dir); | |
1323 | } | |
238def57 | 1324 | |
238def57 DS |
1325 | if (safe_create_leading_directories(ctx->graph_name)) { |
1326 | UNLEAK(ctx->graph_name); | |
1327 | error(_("unable to create leading directories of %s"), | |
1328 | ctx->graph_name); | |
1329 | return -1; | |
1330 | } | |
1331 | ||
6c622f9f DS |
1332 | if (ctx->split) { |
1333 | char *lock_name = get_chain_filename(ctx->obj_dir); | |
1334 | ||
1335 | hold_lock_file_for_update(&lk, lock_name, LOCK_DIE_ON_ERROR); | |
1336 | ||
1337 | fd = git_mkstemp_mode(ctx->graph_name, 0444); | |
1338 | if (fd < 0) { | |
1339 | error(_("unable to create '%s'"), ctx->graph_name); | |
1340 | return -1; | |
1341 | } | |
1342 | ||
1343 | f = hashfd(fd, ctx->graph_name); | |
1344 | } else { | |
1345 | hold_lock_file_for_update(&lk, ctx->graph_name, LOCK_DIE_ON_ERROR); | |
1346 | fd = lk.tempfile->fd; | |
1347 | f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf); | |
1348 | } | |
238def57 | 1349 | |
238def57 DS |
1350 | chunk_ids[0] = GRAPH_CHUNKID_OIDFANOUT; |
1351 | chunk_ids[1] = GRAPH_CHUNKID_OIDLOOKUP; | |
1352 | chunk_ids[2] = GRAPH_CHUNKID_DATA; | |
144354b0 DS |
1353 | if (ctx->num_extra_edges) { |
1354 | chunk_ids[num_chunks] = GRAPH_CHUNKID_EXTRAEDGES; | |
1355 | num_chunks++; | |
1356 | } | |
6c622f9f DS |
1357 | if (ctx->num_commit_graphs_after > 1) { |
1358 | chunk_ids[num_chunks] = GRAPH_CHUNKID_BASE; | |
1359 | num_chunks++; | |
1360 | } | |
144354b0 DS |
1361 | |
1362 | chunk_ids[num_chunks] = 0; | |
238def57 DS |
1363 | |
1364 | chunk_offsets[0] = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH; | |
1365 | chunk_offsets[1] = chunk_offsets[0] + GRAPH_FANOUT_SIZE; | |
1366 | chunk_offsets[2] = chunk_offsets[1] + hashsz * ctx->commits.nr; | |
1367 | chunk_offsets[3] = chunk_offsets[2] + (hashsz + 16) * ctx->commits.nr; | |
144354b0 DS |
1368 | |
1369 | num_chunks = 3; | |
1370 | if (ctx->num_extra_edges) { | |
1371 | chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] + | |
1372 | 4 * ctx->num_extra_edges; | |
1373 | num_chunks++; | |
1374 | } | |
6c622f9f DS |
1375 | if (ctx->num_commit_graphs_after > 1) { |
1376 | chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] + | |
1377 | hashsz * (ctx->num_commit_graphs_after - 1); | |
1378 | num_chunks++; | |
1379 | } | |
144354b0 DS |
1380 | |
1381 | hashwrite_be32(f, GRAPH_SIGNATURE); | |
1382 | ||
1383 | hashwrite_u8(f, GRAPH_VERSION); | |
1384 | hashwrite_u8(f, oid_version()); | |
1385 | hashwrite_u8(f, num_chunks); | |
6c622f9f | 1386 | hashwrite_u8(f, ctx->num_commit_graphs_after - 1); |
238def57 DS |
1387 | |
1388 | for (i = 0; i <= num_chunks; i++) { | |
1389 | uint32_t chunk_write[3]; | |
1390 | ||
1391 | chunk_write[0] = htonl(chunk_ids[i]); | |
1392 | chunk_write[1] = htonl(chunk_offsets[i] >> 32); | |
1393 | chunk_write[2] = htonl(chunk_offsets[i] & 0xffffffff); | |
1394 | hashwrite(f, chunk_write, 12); | |
1395 | } | |
1396 | ||
1397 | if (ctx->report_progress) { | |
1398 | strbuf_addf(&progress_title, | |
1399 | Q_("Writing out commit graph in %d pass", | |
1400 | "Writing out commit graph in %d passes", | |
1401 | num_chunks), | |
1402 | num_chunks); | |
1403 | ctx->progress = start_delayed_progress( | |
1404 | progress_title.buf, | |
1405 | num_chunks * ctx->commits.nr); | |
1406 | } | |
1407 | write_graph_chunk_fanout(f, ctx); | |
1408 | write_graph_chunk_oids(f, hashsz, ctx); | |
1409 | write_graph_chunk_data(f, hashsz, ctx); | |
1410 | if (ctx->num_extra_edges) | |
1411 | write_graph_chunk_extra_edges(f, ctx); | |
6c622f9f DS |
1412 | if (ctx->num_commit_graphs_after > 1 && |
1413 | write_graph_chunk_base(f, ctx)) { | |
1414 | return -1; | |
1415 | } | |
238def57 DS |
1416 | stop_progress(&ctx->progress); |
1417 | strbuf_release(&progress_title); | |
1418 | ||
6c622f9f DS |
1419 | if (ctx->split && ctx->base_graph_name && ctx->num_commit_graphs_after > 1) { |
1420 | char *new_base_hash = xstrdup(oid_to_hex(&ctx->new_base_graph->oid)); | |
1421 | char *new_base_name = get_split_graph_filename(ctx->obj_dir, new_base_hash); | |
1422 | ||
1423 | free(ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2]); | |
1424 | free(ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2]); | |
1425 | ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2] = new_base_name; | |
1426 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2] = new_base_hash; | |
1427 | } | |
1428 | ||
c3a3a964 | 1429 | close_commit_graph(ctx->r->objects); |
6c622f9f DS |
1430 | finalize_hashfile(f, file_hash.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC); |
1431 | ||
1432 | if (ctx->split) { | |
1433 | FILE *chainf = fdopen_lock_file(&lk, "w"); | |
1434 | char *final_graph_name; | |
1435 | int result; | |
1436 | ||
1437 | close(fd); | |
1438 | ||
1439 | if (!chainf) { | |
1440 | error(_("unable to open commit-graph chain file")); | |
1441 | return -1; | |
1442 | } | |
1443 | ||
1444 | if (ctx->base_graph_name) { | |
135a7123 DS |
1445 | const char *dest = ctx->commit_graph_filenames_after[ |
1446 | ctx->num_commit_graphs_after - 2]; | |
6c622f9f | 1447 | |
135a7123 DS |
1448 | if (strcmp(ctx->base_graph_name, dest)) { |
1449 | result = rename(ctx->base_graph_name, dest); | |
1450 | ||
1451 | if (result) { | |
1452 | error(_("failed to rename base commit-graph file")); | |
1453 | return -1; | |
1454 | } | |
6c622f9f DS |
1455 | } |
1456 | } else { | |
1457 | char *graph_name = get_commit_graph_filename(ctx->obj_dir); | |
1458 | unlink(graph_name); | |
1459 | } | |
1460 | ||
1461 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1] = xstrdup(oid_to_hex(&file_hash)); | |
1462 | final_graph_name = get_split_graph_filename(ctx->obj_dir, | |
1463 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1]); | |
1464 | ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 1] = final_graph_name; | |
1465 | ||
1466 | result = rename(ctx->graph_name, final_graph_name); | |
1467 | ||
1468 | for (i = 0; i < ctx->num_commit_graphs_after; i++) | |
1469 | fprintf(lk.tempfile->fp, "%s\n", ctx->commit_graph_hash_after[i]); | |
1470 | ||
1471 | if (result) { | |
1472 | error(_("failed to rename temporary commit-graph file")); | |
1473 | return -1; | |
1474 | } | |
1475 | } | |
1476 | ||
238def57 DS |
1477 | commit_lock_file(&lk); |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | ||
1771be90 DS |
1482 | static int split_strategy_max_commits = 64000; |
1483 | static float split_strategy_size_mult = 2.0f; | |
1484 | ||
1485 | static void split_graph_merge_strategy(struct write_commit_graph_context *ctx) | |
1486 | { | |
1487 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
1488 | uint32_t num_commits = ctx->commits.nr; | |
1489 | uint32_t i; | |
1490 | ||
1491 | g = ctx->r->objects->commit_graph; | |
1492 | ctx->num_commit_graphs_after = ctx->num_commit_graphs_before + 1; | |
1493 | ||
1494 | while (g && (g->num_commits <= split_strategy_size_mult * num_commits || | |
1495 | num_commits > split_strategy_max_commits)) { | |
1496 | num_commits += g->num_commits; | |
1497 | g = g->base_graph; | |
1498 | ||
1499 | ctx->num_commit_graphs_after--; | |
1500 | } | |
1501 | ||
1502 | ctx->new_base_graph = g; | |
1503 | ||
1504 | ALLOC_ARRAY(ctx->commit_graph_filenames_after, ctx->num_commit_graphs_after); | |
1505 | ALLOC_ARRAY(ctx->commit_graph_hash_after, ctx->num_commit_graphs_after); | |
1506 | ||
1507 | for (i = 0; i < ctx->num_commit_graphs_after && | |
1508 | i < ctx->num_commit_graphs_before; i++) | |
1509 | ctx->commit_graph_filenames_after[i] = xstrdup(ctx->commit_graph_filenames_before[i]); | |
1510 | ||
1511 | i = ctx->num_commit_graphs_before - 1; | |
1512 | g = ctx->r->objects->commit_graph; | |
1513 | ||
1514 | while (g) { | |
1515 | if (i < ctx->num_commit_graphs_after) | |
1516 | ctx->commit_graph_hash_after[i] = xstrdup(oid_to_hex(&g->oid)); | |
1517 | ||
1518 | i--; | |
1519 | g = g->base_graph; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | static void merge_commit_graph(struct write_commit_graph_context *ctx, | |
1524 | struct commit_graph *g) | |
1525 | { | |
1526 | uint32_t i; | |
1527 | uint32_t offset = g->num_commits_in_base; | |
1528 | ||
1529 | ALLOC_GROW(ctx->commits.list, ctx->commits.nr + g->num_commits, ctx->commits.alloc); | |
1530 | ||
1531 | for (i = 0; i < g->num_commits; i++) { | |
1532 | struct object_id oid; | |
1533 | struct commit *result; | |
1534 | ||
1535 | display_progress(ctx->progress, i + 1); | |
1536 | ||
1537 | load_oid_from_graph(g, i + offset, &oid); | |
1538 | ||
1539 | /* only add commits if they still exist in the repo */ | |
1540 | result = lookup_commit_reference_gently(ctx->r, &oid, 1); | |
1541 | ||
1542 | if (result) { | |
1543 | ctx->commits.list[ctx->commits.nr] = result; | |
1544 | ctx->commits.nr++; | |
1545 | } | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | static int commit_compare(const void *_a, const void *_b) | |
1550 | { | |
1551 | const struct commit *a = *(const struct commit **)_a; | |
1552 | const struct commit *b = *(const struct commit **)_b; | |
1553 | return oidcmp(&a->object.oid, &b->object.oid); | |
1554 | } | |
1555 | ||
1556 | static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx) | |
1557 | { | |
1558 | uint32_t i, num_parents; | |
1559 | struct commit_list *parent; | |
1560 | ||
1561 | if (ctx->report_progress) | |
1562 | ctx->progress = start_delayed_progress( | |
1563 | _("Scanning merged commits"), | |
1564 | ctx->commits.nr); | |
1565 | ||
1566 | QSORT(ctx->commits.list, ctx->commits.nr, commit_compare); | |
1567 | ||
1568 | ctx->num_extra_edges = 0; | |
1569 | for (i = 0; i < ctx->commits.nr; i++) { | |
1570 | display_progress(ctx->progress, i); | |
1571 | ||
1572 | if (i && oideq(&ctx->commits.list[i - 1]->object.oid, | |
1573 | &ctx->commits.list[i]->object.oid)) { | |
1574 | die(_("unexpected duplicate commit id %s"), | |
1575 | oid_to_hex(&ctx->commits.list[i]->object.oid)); | |
1576 | } else { | |
1577 | num_parents = 0; | |
1578 | for (parent = ctx->commits.list[i]->parents; parent; parent = parent->next) | |
1579 | num_parents++; | |
1580 | ||
1581 | if (num_parents > 2) | |
1582 | ctx->num_extra_edges += num_parents - 2; | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | stop_progress(&ctx->progress); | |
1587 | } | |
1588 | ||
1589 | static void merge_commit_graphs(struct write_commit_graph_context *ctx) | |
1590 | { | |
1591 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
1592 | uint32_t current_graph_number = ctx->num_commit_graphs_before; | |
1593 | struct strbuf progress_title = STRBUF_INIT; | |
1594 | ||
1595 | while (g && current_graph_number >= ctx->num_commit_graphs_after) { | |
1596 | current_graph_number--; | |
1597 | ||
1598 | if (ctx->report_progress) { | |
1599 | strbuf_addstr(&progress_title, _("Merging commit-graph")); | |
1600 | ctx->progress = start_delayed_progress(progress_title.buf, 0); | |
1601 | } | |
1602 | ||
1603 | merge_commit_graph(ctx, g); | |
1604 | stop_progress(&ctx->progress); | |
1605 | strbuf_release(&progress_title); | |
1606 | ||
1607 | g = g->base_graph; | |
1608 | } | |
1609 | ||
1610 | if (g) { | |
1611 | ctx->new_base_graph = g; | |
1612 | ctx->new_num_commits_in_base = g->num_commits + g->num_commits_in_base; | |
1613 | } | |
1614 | ||
1615 | if (ctx->new_base_graph) | |
1616 | ctx->base_graph_name = xstrdup(ctx->new_base_graph->filename); | |
1617 | ||
1618 | sort_and_scan_merged_commits(ctx); | |
1619 | } | |
1620 | ||
238def57 DS |
1621 | int write_commit_graph(const char *obj_dir, |
1622 | struct string_list *pack_indexes, | |
1623 | struct string_list *commit_hex, | |
1624 | unsigned int flags) | |
1625 | { | |
1626 | struct write_commit_graph_context *ctx; | |
1627 | uint32_t i, count_distinct = 0; | |
e103f727 | 1628 | int res = 0; |
08fd81c9 | 1629 | |
d6538246 | 1630 | if (!commit_graph_compatible(the_repository)) |
e103f727 | 1631 | return 0; |
d6538246 | 1632 | |
c9905bea DS |
1633 | ctx = xcalloc(1, sizeof(struct write_commit_graph_context)); |
1634 | ctx->r = the_repository; | |
1635 | ctx->obj_dir = obj_dir; | |
1636 | ctx->append = flags & COMMIT_GRAPH_APPEND ? 1 : 0; | |
1637 | ctx->report_progress = flags & COMMIT_GRAPH_PROGRESS ? 1 : 0; | |
6c622f9f DS |
1638 | ctx->split = flags & COMMIT_GRAPH_SPLIT ? 1 : 0; |
1639 | ||
1640 | if (ctx->split) { | |
1641 | struct commit_graph *g; | |
1642 | prepare_commit_graph(ctx->r); | |
1643 | ||
1644 | g = ctx->r->objects->commit_graph; | |
1645 | ||
1646 | while (g) { | |
1647 | ctx->num_commit_graphs_before++; | |
1648 | g = g->base_graph; | |
1649 | } | |
1650 | ||
1651 | if (ctx->num_commit_graphs_before) { | |
1652 | ALLOC_ARRAY(ctx->commit_graph_filenames_before, ctx->num_commit_graphs_before); | |
1653 | i = ctx->num_commit_graphs_before; | |
1654 | g = ctx->r->objects->commit_graph; | |
1655 | ||
1656 | while (g) { | |
1657 | ctx->commit_graph_filenames_before[--i] = xstrdup(g->filename); | |
1658 | g = g->base_graph; | |
1659 | } | |
1660 | } | |
1661 | } | |
c9905bea DS |
1662 | |
1663 | ctx->approx_nr_objects = approximate_object_count(); | |
1664 | ctx->oids.alloc = ctx->approx_nr_objects / 32; | |
1665 | ||
1771be90 DS |
1666 | if (ctx->split && ctx->oids.alloc > split_strategy_max_commits) |
1667 | ctx->oids.alloc = split_strategy_max_commits; | |
1668 | ||
c9905bea DS |
1669 | if (ctx->append) { |
1670 | prepare_commit_graph_one(ctx->r, ctx->obj_dir); | |
1671 | if (ctx->r->objects->commit_graph) | |
1672 | ctx->oids.alloc += ctx->r->objects->commit_graph->num_commits; | |
7547b95b DS |
1673 | } |
1674 | ||
c9905bea DS |
1675 | if (ctx->oids.alloc < 1024) |
1676 | ctx->oids.alloc = 1024; | |
1677 | ALLOC_ARRAY(ctx->oids.list, ctx->oids.alloc); | |
1678 | ||
1679 | if (ctx->append && ctx->r->objects->commit_graph) { | |
1680 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
1681 | for (i = 0; i < g->num_commits; i++) { | |
1682 | const unsigned char *hash = g->chunk_oid_lookup + g->hash_len * i; | |
1683 | hashcpy(ctx->oids.list[ctx->oids.nr++].hash, hash); | |
7547b95b DS |
1684 | } |
1685 | } | |
1686 | ||
049d51a2 | 1687 | if (pack_indexes) { |
ef5b83f2 DS |
1688 | if ((res = fill_oids_from_packs(ctx, pack_indexes))) |
1689 | goto cleanup; | |
3d5df01b DS |
1690 | } |
1691 | ||
4c9efe85 DS |
1692 | if (commit_hex) |
1693 | fill_oids_from_commit_hex(ctx, commit_hex); | |
3d5df01b | 1694 | |
b2c83060 DS |
1695 | if (!pack_indexes && !commit_hex) |
1696 | fill_oids_from_all_packs(ctx); | |
049d51a2 | 1697 | |
c9905bea | 1698 | close_reachable(ctx); |
08fd81c9 | 1699 | |
014e3440 | 1700 | count_distinct = count_distinct_commits(ctx); |
08fd81c9 | 1701 | |
e103f727 DS |
1702 | if (count_distinct >= GRAPH_EDGE_LAST_MASK) { |
1703 | error(_("the commit graph format cannot write %d commits"), count_distinct); | |
1704 | res = -1; | |
1705 | goto cleanup; | |
1706 | } | |
08fd81c9 | 1707 | |
c9905bea DS |
1708 | ctx->commits.alloc = count_distinct; |
1709 | ALLOC_ARRAY(ctx->commits.list, ctx->commits.alloc); | |
08fd81c9 | 1710 | |
f998d542 | 1711 | copy_oids_to_commits(ctx); |
08fd81c9 | 1712 | |
c9905bea | 1713 | if (ctx->commits.nr >= GRAPH_EDGE_LAST_MASK) { |
e103f727 DS |
1714 | error(_("too many commits to write graph")); |
1715 | res = -1; | |
1716 | goto cleanup; | |
1717 | } | |
08fd81c9 | 1718 | |
6c622f9f DS |
1719 | if (!ctx->commits.nr) |
1720 | goto cleanup; | |
1721 | ||
1771be90 DS |
1722 | if (ctx->split) { |
1723 | split_graph_merge_strategy(ctx); | |
1724 | ||
1725 | merge_commit_graphs(ctx); | |
1726 | } else | |
6c622f9f DS |
1727 | ctx->num_commit_graphs_after = 1; |
1728 | ||
c9905bea | 1729 | compute_generation_numbers(ctx); |
08fd81c9 | 1730 | |
238def57 | 1731 | res = write_commit_graph_file(ctx); |
08fd81c9 | 1732 | |
e103f727 | 1733 | cleanup: |
238def57 | 1734 | free(ctx->graph_name); |
c9905bea DS |
1735 | free(ctx->commits.list); |
1736 | free(ctx->oids.list); | |
6c622f9f DS |
1737 | |
1738 | if (ctx->commit_graph_filenames_after) { | |
1739 | for (i = 0; i < ctx->num_commit_graphs_after; i++) { | |
1740 | free(ctx->commit_graph_filenames_after[i]); | |
1741 | free(ctx->commit_graph_hash_after[i]); | |
1742 | } | |
1743 | ||
1744 | for (i = 0; i < ctx->num_commit_graphs_before; i++) | |
1745 | free(ctx->commit_graph_filenames_before[i]); | |
1746 | ||
1747 | free(ctx->commit_graph_filenames_after); | |
1748 | free(ctx->commit_graph_filenames_before); | |
1749 | free(ctx->commit_graph_hash_after); | |
1750 | } | |
1751 | ||
c9905bea | 1752 | free(ctx); |
e103f727 DS |
1753 | |
1754 | return res; | |
08fd81c9 | 1755 | } |
283e68c7 | 1756 | |
41df0e30 | 1757 | #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 |
283e68c7 DS |
1758 | static int verify_commit_graph_error; |
1759 | ||
1760 | static void graph_report(const char *fmt, ...) | |
1761 | { | |
1762 | va_list ap; | |
1763 | ||
1764 | verify_commit_graph_error = 1; | |
1765 | va_start(ap, fmt); | |
1766 | vfprintf(stderr, fmt, ap); | |
1767 | fprintf(stderr, "\n"); | |
1768 | va_end(ap); | |
1769 | } | |
1770 | ||
1373e547 DS |
1771 | #define GENERATION_ZERO_EXISTS 1 |
1772 | #define GENERATION_NUMBER_EXISTS 2 | |
1773 | ||
283e68c7 DS |
1774 | int verify_commit_graph(struct repository *r, struct commit_graph *g) |
1775 | { | |
9bda8467 | 1776 | uint32_t i, cur_fanout_pos = 0; |
41df0e30 | 1777 | struct object_id prev_oid, cur_oid, checksum; |
1373e547 | 1778 | int generation_zero = 0; |
41df0e30 DS |
1779 | struct hashfile *f; |
1780 | int devnull; | |
1f7f557f | 1781 | struct progress *progress = NULL; |
9bda8467 | 1782 | |
283e68c7 DS |
1783 | if (!g) { |
1784 | graph_report("no commit-graph file loaded"); | |
1785 | return 1; | |
1786 | } | |
1787 | ||
2ac138d5 | 1788 | verify_commit_graph_error = verify_commit_graph_lite(g); |
9bda8467 DS |
1789 | if (verify_commit_graph_error) |
1790 | return verify_commit_graph_error; | |
1791 | ||
41df0e30 DS |
1792 | devnull = open("/dev/null", O_WRONLY); |
1793 | f = hashfd(devnull, NULL); | |
1794 | hashwrite(f, g->data, g->data_len - g->hash_len); | |
1795 | finalize_hashfile(f, checksum.hash, CSUM_CLOSE); | |
67947c34 | 1796 | if (!hasheq(checksum.hash, g->data + g->data_len - g->hash_len)) { |
41df0e30 DS |
1797 | graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt")); |
1798 | verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH; | |
1799 | } | |
1800 | ||
9bda8467 | 1801 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 DS |
1802 | struct commit *graph_commit; |
1803 | ||
9bda8467 DS |
1804 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); |
1805 | ||
1806 | if (i && oidcmp(&prev_oid, &cur_oid) >= 0) | |
93b4405f | 1807 | graph_report(_("commit-graph has incorrect OID order: %s then %s"), |
9bda8467 DS |
1808 | oid_to_hex(&prev_oid), |
1809 | oid_to_hex(&cur_oid)); | |
1810 | ||
1811 | oidcpy(&prev_oid, &cur_oid); | |
1812 | ||
1813 | while (cur_oid.hash[0] > cur_fanout_pos) { | |
1814 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1815 | ||
1816 | if (i != fanout_value) | |
93b4405f | 1817 | graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), |
9bda8467 DS |
1818 | cur_fanout_pos, fanout_value, i); |
1819 | cur_fanout_pos++; | |
1820 | } | |
2e3c0737 | 1821 | |
82952964 | 1822 | graph_commit = lookup_commit(r, &cur_oid); |
4f542b7a | 1823 | if (!parse_commit_in_graph_one(r, g, graph_commit)) |
93b4405f | 1824 | graph_report(_("failed to parse commit %s from commit-graph"), |
2e3c0737 | 1825 | oid_to_hex(&cur_oid)); |
9bda8467 DS |
1826 | } |
1827 | ||
1828 | while (cur_fanout_pos < 256) { | |
1829 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1830 | ||
1831 | if (g->num_commits != fanout_value) | |
93b4405f | 1832 | graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), |
9bda8467 DS |
1833 | cur_fanout_pos, fanout_value, i); |
1834 | ||
1835 | cur_fanout_pos++; | |
1836 | } | |
1837 | ||
41df0e30 | 1838 | if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH) |
96af91d4 DS |
1839 | return verify_commit_graph_error; |
1840 | ||
1f7f557f ÆAB |
1841 | progress = start_progress(_("Verifying commits in commit graph"), |
1842 | g->num_commits); | |
96af91d4 | 1843 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 | 1844 | struct commit *graph_commit, *odb_commit; |
53614b13 | 1845 | struct commit_list *graph_parents, *odb_parents; |
1373e547 | 1846 | uint32_t max_generation = 0; |
96af91d4 | 1847 | |
1f7f557f | 1848 | display_progress(progress, i + 1); |
96af91d4 DS |
1849 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); |
1850 | ||
82952964 | 1851 | graph_commit = lookup_commit(r, &cur_oid); |
96af91d4 DS |
1852 | odb_commit = (struct commit *)create_object(r, cur_oid.hash, alloc_commit_node(r)); |
1853 | if (parse_commit_internal(odb_commit, 0, 0)) { | |
93b4405f | 1854 | graph_report(_("failed to parse commit %s from object database for commit-graph"), |
96af91d4 DS |
1855 | oid_to_hex(&cur_oid)); |
1856 | continue; | |
1857 | } | |
2e3c0737 | 1858 | |
4f542b7a | 1859 | if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid, |
2e3c0737 | 1860 | get_commit_tree_oid(odb_commit))) |
93b4405f | 1861 | graph_report(_("root tree OID for commit %s in commit-graph is %s != %s"), |
2e3c0737 DS |
1862 | oid_to_hex(&cur_oid), |
1863 | oid_to_hex(get_commit_tree_oid(graph_commit)), | |
1864 | oid_to_hex(get_commit_tree_oid(odb_commit))); | |
53614b13 DS |
1865 | |
1866 | graph_parents = graph_commit->parents; | |
1867 | odb_parents = odb_commit->parents; | |
1868 | ||
1869 | while (graph_parents) { | |
1870 | if (odb_parents == NULL) { | |
93b4405f | 1871 | graph_report(_("commit-graph parent list for commit %s is too long"), |
53614b13 DS |
1872 | oid_to_hex(&cur_oid)); |
1873 | break; | |
1874 | } | |
1875 | ||
9001dc2a | 1876 | if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid)) |
93b4405f | 1877 | graph_report(_("commit-graph parent for %s is %s != %s"), |
53614b13 DS |
1878 | oid_to_hex(&cur_oid), |
1879 | oid_to_hex(&graph_parents->item->object.oid), | |
1880 | oid_to_hex(&odb_parents->item->object.oid)); | |
1881 | ||
1373e547 DS |
1882 | if (graph_parents->item->generation > max_generation) |
1883 | max_generation = graph_parents->item->generation; | |
1884 | ||
53614b13 DS |
1885 | graph_parents = graph_parents->next; |
1886 | odb_parents = odb_parents->next; | |
1887 | } | |
1888 | ||
1889 | if (odb_parents != NULL) | |
93b4405f | 1890 | graph_report(_("commit-graph parent list for commit %s terminates early"), |
53614b13 | 1891 | oid_to_hex(&cur_oid)); |
1373e547 DS |
1892 | |
1893 | if (!graph_commit->generation) { | |
1894 | if (generation_zero == GENERATION_NUMBER_EXISTS) | |
93b4405f | 1895 | graph_report(_("commit-graph has generation number zero for commit %s, but non-zero elsewhere"), |
1373e547 DS |
1896 | oid_to_hex(&cur_oid)); |
1897 | generation_zero = GENERATION_ZERO_EXISTS; | |
1898 | } else if (generation_zero == GENERATION_ZERO_EXISTS) | |
93b4405f | 1899 | graph_report(_("commit-graph has non-zero generation number for commit %s, but zero elsewhere"), |
1373e547 DS |
1900 | oid_to_hex(&cur_oid)); |
1901 | ||
1902 | if (generation_zero == GENERATION_ZERO_EXISTS) | |
1903 | continue; | |
1904 | ||
1905 | /* | |
1906 | * If one of our parents has generation GENERATION_NUMBER_MAX, then | |
1907 | * our generation is also GENERATION_NUMBER_MAX. Decrement to avoid | |
1908 | * extra logic in the following condition. | |
1909 | */ | |
1910 | if (max_generation == GENERATION_NUMBER_MAX) | |
1911 | max_generation--; | |
1912 | ||
1913 | if (graph_commit->generation != max_generation + 1) | |
93b4405f | 1914 | graph_report(_("commit-graph generation for commit %s is %u != %u"), |
1373e547 DS |
1915 | oid_to_hex(&cur_oid), |
1916 | graph_commit->generation, | |
1917 | max_generation + 1); | |
88968ebf DS |
1918 | |
1919 | if (graph_commit->date != odb_commit->date) | |
93b4405f | 1920 | graph_report(_("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime), |
88968ebf DS |
1921 | oid_to_hex(&cur_oid), |
1922 | graph_commit->date, | |
1923 | odb_commit->date); | |
96af91d4 | 1924 | } |
1f7f557f | 1925 | stop_progress(&progress); |
96af91d4 | 1926 | |
283e68c7 DS |
1927 | return verify_commit_graph_error; |
1928 | } | |
c3756d5b JT |
1929 | |
1930 | void free_commit_graph(struct commit_graph *g) | |
1931 | { | |
1932 | if (!g) | |
1933 | return; | |
1934 | if (g->graph_fd >= 0) { | |
1935 | munmap((void *)g->data, g->data_len); | |
1936 | g->data = NULL; | |
1937 | close(g->graph_fd); | |
1938 | } | |
6c622f9f | 1939 | free(g->filename); |
c3756d5b JT |
1940 | free(g); |
1941 | } |