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1 | #include "cache.h" | |
2 | #include "tag.h" | |
3 | #include "commit.h" | |
4 | #include "commit-graph.h" | |
5 | #include "repository.h" | |
6 | #include "object-store.h" | |
7 | #include "pkt-line.h" | |
8 | #include "utf8.h" | |
9 | #include "diff.h" | |
10 | #include "revision.h" | |
11 | #include "notes.h" | |
12 | #include "alloc.h" | |
13 | #include "gpg-interface.h" | |
14 | #include "mergesort.h" | |
15 | #include "commit-slab.h" | |
16 | #include "prio-queue.h" | |
17 | #include "sha1-lookup.h" | |
18 | #include "wt-status.h" | |
19 | #include "advice.h" | |
20 | #include "refs.h" | |
21 | #include "commit-reach.h" | |
22 | #include "run-command.h" | |
23 | #include "shallow.h" | |
24 | ||
25 | static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); | |
26 | ||
27 | int save_commit_buffer = 1; | |
28 | ||
29 | const char *commit_type = "commit"; | |
30 | ||
31 | struct commit *lookup_commit_reference_gently(struct repository *r, | |
32 | const struct object_id *oid, int quiet) | |
33 | { | |
34 | struct object *obj = deref_tag(r, | |
35 | parse_object(r, oid), | |
36 | NULL, 0); | |
37 | ||
38 | if (!obj) | |
39 | return NULL; | |
40 | return object_as_type(obj, OBJ_COMMIT, quiet); | |
41 | } | |
42 | ||
43 | struct commit *lookup_commit_reference(struct repository *r, const struct object_id *oid) | |
44 | { | |
45 | return lookup_commit_reference_gently(r, oid, 0); | |
46 | } | |
47 | ||
48 | struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) | |
49 | { | |
50 | struct commit *c = lookup_commit_reference(the_repository, oid); | |
51 | if (!c) | |
52 | die(_("could not parse %s"), ref_name); | |
53 | if (!oideq(oid, &c->object.oid)) { | |
54 | warning(_("%s %s is not a commit!"), | |
55 | ref_name, oid_to_hex(oid)); | |
56 | } | |
57 | return c; | |
58 | } | |
59 | ||
60 | struct commit *lookup_commit(struct repository *r, const struct object_id *oid) | |
61 | { | |
62 | struct object *obj = lookup_object(r, oid); | |
63 | if (!obj) | |
64 | return create_object(r, oid, alloc_commit_node(r)); | |
65 | return object_as_type(obj, OBJ_COMMIT, 0); | |
66 | } | |
67 | ||
68 | struct commit *lookup_commit_reference_by_name(const char *name) | |
69 | { | |
70 | struct object_id oid; | |
71 | struct commit *commit; | |
72 | ||
73 | if (get_oid_committish(name, &oid)) | |
74 | return NULL; | |
75 | commit = lookup_commit_reference(the_repository, &oid); | |
76 | if (parse_commit(commit)) | |
77 | return NULL; | |
78 | return commit; | |
79 | } | |
80 | ||
81 | static timestamp_t parse_commit_date(const char *buf, const char *tail) | |
82 | { | |
83 | const char *dateptr; | |
84 | ||
85 | if (buf + 6 >= tail) | |
86 | return 0; | |
87 | if (memcmp(buf, "author", 6)) | |
88 | return 0; | |
89 | while (buf < tail && *buf++ != '\n') | |
90 | /* nada */; | |
91 | if (buf + 9 >= tail) | |
92 | return 0; | |
93 | if (memcmp(buf, "committer", 9)) | |
94 | return 0; | |
95 | while (buf < tail && *buf++ != '>') | |
96 | /* nada */; | |
97 | if (buf >= tail) | |
98 | return 0; | |
99 | dateptr = buf; | |
100 | while (buf < tail && *buf++ != '\n') | |
101 | /* nada */; | |
102 | if (buf >= tail) | |
103 | return 0; | |
104 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ | |
105 | return parse_timestamp(dateptr, NULL, 10); | |
106 | } | |
107 | ||
108 | static const unsigned char *commit_graft_sha1_access(size_t index, void *table) | |
109 | { | |
110 | struct commit_graft **commit_graft_table = table; | |
111 | return commit_graft_table[index]->oid.hash; | |
112 | } | |
113 | ||
114 | int commit_graft_pos(struct repository *r, const unsigned char *sha1) | |
115 | { | |
116 | return sha1_pos(sha1, r->parsed_objects->grafts, | |
117 | r->parsed_objects->grafts_nr, | |
118 | commit_graft_sha1_access); | |
119 | } | |
120 | ||
121 | int register_commit_graft(struct repository *r, struct commit_graft *graft, | |
122 | int ignore_dups) | |
123 | { | |
124 | int pos = commit_graft_pos(r, graft->oid.hash); | |
125 | ||
126 | if (0 <= pos) { | |
127 | if (ignore_dups) | |
128 | free(graft); | |
129 | else { | |
130 | free(r->parsed_objects->grafts[pos]); | |
131 | r->parsed_objects->grafts[pos] = graft; | |
132 | } | |
133 | return 1; | |
134 | } | |
135 | pos = -pos - 1; | |
136 | ALLOC_GROW(r->parsed_objects->grafts, | |
137 | r->parsed_objects->grafts_nr + 1, | |
138 | r->parsed_objects->grafts_alloc); | |
139 | r->parsed_objects->grafts_nr++; | |
140 | if (pos < r->parsed_objects->grafts_nr) | |
141 | memmove(r->parsed_objects->grafts + pos + 1, | |
142 | r->parsed_objects->grafts + pos, | |
143 | (r->parsed_objects->grafts_nr - pos - 1) * | |
144 | sizeof(*r->parsed_objects->grafts)); | |
145 | r->parsed_objects->grafts[pos] = graft; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | struct commit_graft *read_graft_line(struct strbuf *line) | |
150 | { | |
151 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
152 | int i, phase; | |
153 | const char *tail = NULL; | |
154 | struct commit_graft *graft = NULL; | |
155 | struct object_id dummy_oid, *oid; | |
156 | ||
157 | strbuf_rtrim(line); | |
158 | if (!line->len || line->buf[0] == '#') | |
159 | return NULL; | |
160 | /* | |
161 | * phase 0 verifies line, counts hashes in line and allocates graft | |
162 | * phase 1 fills graft | |
163 | */ | |
164 | for (phase = 0; phase < 2; phase++) { | |
165 | oid = graft ? &graft->oid : &dummy_oid; | |
166 | if (parse_oid_hex(line->buf, oid, &tail)) | |
167 | goto bad_graft_data; | |
168 | for (i = 0; *tail != '\0'; i++) { | |
169 | oid = graft ? &graft->parent[i] : &dummy_oid; | |
170 | if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail)) | |
171 | goto bad_graft_data; | |
172 | } | |
173 | if (!graft) { | |
174 | graft = xmalloc(st_add(sizeof(*graft), | |
175 | st_mult(sizeof(struct object_id), i))); | |
176 | graft->nr_parent = i; | |
177 | } | |
178 | } | |
179 | return graft; | |
180 | ||
181 | bad_graft_data: | |
182 | error("bad graft data: %s", line->buf); | |
183 | assert(!graft); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | static int read_graft_file(struct repository *r, const char *graft_file) | |
188 | { | |
189 | FILE *fp = fopen_or_warn(graft_file, "r"); | |
190 | struct strbuf buf = STRBUF_INIT; | |
191 | if (!fp) | |
192 | return -1; | |
193 | if (advice_graft_file_deprecated) | |
194 | advise(_("Support for <GIT_DIR>/info/grafts is deprecated\n" | |
195 | "and will be removed in a future Git version.\n" | |
196 | "\n" | |
197 | "Please use \"git replace --convert-graft-file\"\n" | |
198 | "to convert the grafts into replace refs.\n" | |
199 | "\n" | |
200 | "Turn this message off by running\n" | |
201 | "\"git config advice.graftFileDeprecated false\"")); | |
202 | while (!strbuf_getwholeline(&buf, fp, '\n')) { | |
203 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
204 | struct commit_graft *graft = read_graft_line(&buf); | |
205 | if (!graft) | |
206 | continue; | |
207 | if (register_commit_graft(r, graft, 1)) | |
208 | error("duplicate graft data: %s", buf.buf); | |
209 | } | |
210 | fclose(fp); | |
211 | strbuf_release(&buf); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | void prepare_commit_graft(struct repository *r) | |
216 | { | |
217 | char *graft_file; | |
218 | ||
219 | if (r->parsed_objects->commit_graft_prepared) | |
220 | return; | |
221 | if (!startup_info->have_repository) | |
222 | return; | |
223 | ||
224 | graft_file = get_graft_file(r); | |
225 | read_graft_file(r, graft_file); | |
226 | /* make sure shallows are read */ | |
227 | is_repository_shallow(r); | |
228 | r->parsed_objects->commit_graft_prepared = 1; | |
229 | } | |
230 | ||
231 | struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid) | |
232 | { | |
233 | int pos; | |
234 | prepare_commit_graft(r); | |
235 | pos = commit_graft_pos(r, oid->hash); | |
236 | if (pos < 0) | |
237 | return NULL; | |
238 | return r->parsed_objects->grafts[pos]; | |
239 | } | |
240 | ||
241 | int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) | |
242 | { | |
243 | int i, ret; | |
244 | for (i = ret = 0; i < the_repository->parsed_objects->grafts_nr && !ret; i++) | |
245 | ret = fn(the_repository->parsed_objects->grafts[i], cb_data); | |
246 | return ret; | |
247 | } | |
248 | ||
249 | struct commit_buffer { | |
250 | void *buffer; | |
251 | unsigned long size; | |
252 | }; | |
253 | define_commit_slab(buffer_slab, struct commit_buffer); | |
254 | ||
255 | struct buffer_slab *allocate_commit_buffer_slab(void) | |
256 | { | |
257 | struct buffer_slab *bs = xmalloc(sizeof(*bs)); | |
258 | init_buffer_slab(bs); | |
259 | return bs; | |
260 | } | |
261 | ||
262 | void free_commit_buffer_slab(struct buffer_slab *bs) | |
263 | { | |
264 | clear_buffer_slab(bs); | |
265 | free(bs); | |
266 | } | |
267 | ||
268 | void set_commit_buffer(struct repository *r, struct commit *commit, void *buffer, unsigned long size) | |
269 | { | |
270 | struct commit_buffer *v = buffer_slab_at( | |
271 | r->parsed_objects->buffer_slab, commit); | |
272 | v->buffer = buffer; | |
273 | v->size = size; | |
274 | } | |
275 | ||
276 | const void *get_cached_commit_buffer(struct repository *r, const struct commit *commit, unsigned long *sizep) | |
277 | { | |
278 | struct commit_buffer *v = buffer_slab_peek( | |
279 | r->parsed_objects->buffer_slab, commit); | |
280 | if (!v) { | |
281 | if (sizep) | |
282 | *sizep = 0; | |
283 | return NULL; | |
284 | } | |
285 | if (sizep) | |
286 | *sizep = v->size; | |
287 | return v->buffer; | |
288 | } | |
289 | ||
290 | const void *repo_get_commit_buffer(struct repository *r, | |
291 | const struct commit *commit, | |
292 | unsigned long *sizep) | |
293 | { | |
294 | const void *ret = get_cached_commit_buffer(r, commit, sizep); | |
295 | if (!ret) { | |
296 | enum object_type type; | |
297 | unsigned long size; | |
298 | ret = repo_read_object_file(r, &commit->object.oid, &type, &size); | |
299 | if (!ret) | |
300 | die("cannot read commit object %s", | |
301 | oid_to_hex(&commit->object.oid)); | |
302 | if (type != OBJ_COMMIT) | |
303 | die("expected commit for %s, got %s", | |
304 | oid_to_hex(&commit->object.oid), type_name(type)); | |
305 | if (sizep) | |
306 | *sizep = size; | |
307 | } | |
308 | return ret; | |
309 | } | |
310 | ||
311 | void repo_unuse_commit_buffer(struct repository *r, | |
312 | const struct commit *commit, | |
313 | const void *buffer) | |
314 | { | |
315 | struct commit_buffer *v = buffer_slab_peek( | |
316 | r->parsed_objects->buffer_slab, commit); | |
317 | if (!(v && v->buffer == buffer)) | |
318 | free((void *)buffer); | |
319 | } | |
320 | ||
321 | void free_commit_buffer(struct parsed_object_pool *pool, struct commit *commit) | |
322 | { | |
323 | struct commit_buffer *v = buffer_slab_peek( | |
324 | pool->buffer_slab, commit); | |
325 | if (v) { | |
326 | FREE_AND_NULL(v->buffer); | |
327 | v->size = 0; | |
328 | } | |
329 | } | |
330 | ||
331 | static inline void set_commit_tree(struct commit *c, struct tree *t) | |
332 | { | |
333 | c->maybe_tree = t; | |
334 | } | |
335 | ||
336 | struct tree *repo_get_commit_tree(struct repository *r, | |
337 | const struct commit *commit) | |
338 | { | |
339 | if (commit->maybe_tree || !commit->object.parsed) | |
340 | return commit->maybe_tree; | |
341 | ||
342 | if (commit_graph_position(commit) != COMMIT_NOT_FROM_GRAPH) | |
343 | return get_commit_tree_in_graph(r, commit); | |
344 | ||
345 | return NULL; | |
346 | } | |
347 | ||
348 | struct object_id *get_commit_tree_oid(const struct commit *commit) | |
349 | { | |
350 | struct tree *tree = get_commit_tree(commit); | |
351 | return tree ? &tree->object.oid : NULL; | |
352 | } | |
353 | ||
354 | void release_commit_memory(struct parsed_object_pool *pool, struct commit *c) | |
355 | { | |
356 | set_commit_tree(c, NULL); | |
357 | free_commit_buffer(pool, c); | |
358 | c->index = 0; | |
359 | free_commit_list(c->parents); | |
360 | ||
361 | c->object.parsed = 0; | |
362 | } | |
363 | ||
364 | const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) | |
365 | { | |
366 | struct commit_buffer *v = buffer_slab_peek( | |
367 | the_repository->parsed_objects->buffer_slab, commit); | |
368 | void *ret; | |
369 | ||
370 | if (!v) { | |
371 | if (sizep) | |
372 | *sizep = 0; | |
373 | return NULL; | |
374 | } | |
375 | ret = v->buffer; | |
376 | if (sizep) | |
377 | *sizep = v->size; | |
378 | ||
379 | v->buffer = NULL; | |
380 | v->size = 0; | |
381 | return ret; | |
382 | } | |
383 | ||
384 | int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph) | |
385 | { | |
386 | const char *tail = buffer; | |
387 | const char *bufptr = buffer; | |
388 | struct object_id parent; | |
389 | struct commit_list **pptr; | |
390 | struct commit_graft *graft; | |
391 | const int tree_entry_len = the_hash_algo->hexsz + 5; | |
392 | const int parent_entry_len = the_hash_algo->hexsz + 7; | |
393 | struct tree *tree; | |
394 | ||
395 | if (item->object.parsed) | |
396 | return 0; | |
397 | ||
398 | if (item->parents) { | |
399 | /* | |
400 | * Presumably this is leftover from an earlier failed parse; | |
401 | * clear it out in preparation for us re-parsing (we'll hit the | |
402 | * same error, but that's good, since it lets our caller know | |
403 | * the result cannot be trusted. | |
404 | */ | |
405 | free_commit_list(item->parents); | |
406 | item->parents = NULL; | |
407 | } | |
408 | ||
409 | tail += size; | |
410 | if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || | |
411 | bufptr[tree_entry_len] != '\n') | |
412 | return error("bogus commit object %s", oid_to_hex(&item->object.oid)); | |
413 | if (get_oid_hex(bufptr + 5, &parent) < 0) | |
414 | return error("bad tree pointer in commit %s", | |
415 | oid_to_hex(&item->object.oid)); | |
416 | tree = lookup_tree(r, &parent); | |
417 | if (!tree) | |
418 | return error("bad tree pointer %s in commit %s", | |
419 | oid_to_hex(&parent), | |
420 | oid_to_hex(&item->object.oid)); | |
421 | set_commit_tree(item, tree); | |
422 | bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ | |
423 | pptr = &item->parents; | |
424 | ||
425 | graft = lookup_commit_graft(r, &item->object.oid); | |
426 | while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { | |
427 | struct commit *new_parent; | |
428 | ||
429 | if (tail <= bufptr + parent_entry_len + 1 || | |
430 | get_oid_hex(bufptr + 7, &parent) || | |
431 | bufptr[parent_entry_len] != '\n') | |
432 | return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); | |
433 | bufptr += parent_entry_len + 1; | |
434 | /* | |
435 | * The clone is shallow if nr_parent < 0, and we must | |
436 | * not traverse its real parents even when we unhide them. | |
437 | */ | |
438 | if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) | |
439 | continue; | |
440 | new_parent = lookup_commit(r, &parent); | |
441 | if (!new_parent) | |
442 | return error("bad parent %s in commit %s", | |
443 | oid_to_hex(&parent), | |
444 | oid_to_hex(&item->object.oid)); | |
445 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
446 | } | |
447 | if (graft) { | |
448 | int i; | |
449 | struct commit *new_parent; | |
450 | for (i = 0; i < graft->nr_parent; i++) { | |
451 | new_parent = lookup_commit(r, | |
452 | &graft->parent[i]); | |
453 | if (!new_parent) | |
454 | return error("bad graft parent %s in commit %s", | |
455 | oid_to_hex(&graft->parent[i]), | |
456 | oid_to_hex(&item->object.oid)); | |
457 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
458 | } | |
459 | } | |
460 | item->date = parse_commit_date(bufptr, tail); | |
461 | ||
462 | if (check_graph) | |
463 | load_commit_graph_info(r, item); | |
464 | ||
465 | item->object.parsed = 1; | |
466 | return 0; | |
467 | } | |
468 | ||
469 | int repo_parse_commit_internal(struct repository *r, | |
470 | struct commit *item, | |
471 | int quiet_on_missing, | |
472 | int use_commit_graph) | |
473 | { | |
474 | enum object_type type; | |
475 | void *buffer; | |
476 | unsigned long size; | |
477 | int ret; | |
478 | ||
479 | if (!item) | |
480 | return -1; | |
481 | if (item->object.parsed) | |
482 | return 0; | |
483 | if (use_commit_graph && parse_commit_in_graph(r, item)) | |
484 | return 0; | |
485 | buffer = repo_read_object_file(r, &item->object.oid, &type, &size); | |
486 | if (!buffer) | |
487 | return quiet_on_missing ? -1 : | |
488 | error("Could not read %s", | |
489 | oid_to_hex(&item->object.oid)); | |
490 | if (type != OBJ_COMMIT) { | |
491 | free(buffer); | |
492 | return error("Object %s not a commit", | |
493 | oid_to_hex(&item->object.oid)); | |
494 | } | |
495 | ||
496 | ret = parse_commit_buffer(r, item, buffer, size, 0); | |
497 | if (save_commit_buffer && !ret) { | |
498 | set_commit_buffer(r, item, buffer, size); | |
499 | return 0; | |
500 | } | |
501 | free(buffer); | |
502 | return ret; | |
503 | } | |
504 | ||
505 | int repo_parse_commit_gently(struct repository *r, | |
506 | struct commit *item, int quiet_on_missing) | |
507 | { | |
508 | return repo_parse_commit_internal(r, item, quiet_on_missing, 1); | |
509 | } | |
510 | ||
511 | void parse_commit_or_die(struct commit *item) | |
512 | { | |
513 | if (parse_commit(item)) | |
514 | die("unable to parse commit %s", | |
515 | item ? oid_to_hex(&item->object.oid) : "(null)"); | |
516 | } | |
517 | ||
518 | int find_commit_subject(const char *commit_buffer, const char **subject) | |
519 | { | |
520 | const char *eol; | |
521 | const char *p = commit_buffer; | |
522 | ||
523 | while (*p && (*p != '\n' || p[1] != '\n')) | |
524 | p++; | |
525 | if (*p) { | |
526 | p = skip_blank_lines(p + 2); | |
527 | eol = strchrnul(p, '\n'); | |
528 | } else | |
529 | eol = p; | |
530 | ||
531 | *subject = p; | |
532 | ||
533 | return eol - p; | |
534 | } | |
535 | ||
536 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) | |
537 | { | |
538 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); | |
539 | new_list->item = item; | |
540 | new_list->next = *list_p; | |
541 | *list_p = new_list; | |
542 | return new_list; | |
543 | } | |
544 | ||
545 | unsigned commit_list_count(const struct commit_list *l) | |
546 | { | |
547 | unsigned c = 0; | |
548 | for (; l; l = l->next ) | |
549 | c++; | |
550 | return c; | |
551 | } | |
552 | ||
553 | struct commit_list *copy_commit_list(struct commit_list *list) | |
554 | { | |
555 | struct commit_list *head = NULL; | |
556 | struct commit_list **pp = &head; | |
557 | while (list) { | |
558 | pp = commit_list_append(list->item, pp); | |
559 | list = list->next; | |
560 | } | |
561 | return head; | |
562 | } | |
563 | ||
564 | void free_commit_list(struct commit_list *list) | |
565 | { | |
566 | while (list) | |
567 | pop_commit(&list); | |
568 | } | |
569 | ||
570 | struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) | |
571 | { | |
572 | struct commit_list **pp = list; | |
573 | struct commit_list *p; | |
574 | while ((p = *pp) != NULL) { | |
575 | if (p->item->date < item->date) { | |
576 | break; | |
577 | } | |
578 | pp = &p->next; | |
579 | } | |
580 | return commit_list_insert(item, pp); | |
581 | } | |
582 | ||
583 | static int commit_list_compare_by_date(const void *a, const void *b) | |
584 | { | |
585 | timestamp_t a_date = ((const struct commit_list *)a)->item->date; | |
586 | timestamp_t b_date = ((const struct commit_list *)b)->item->date; | |
587 | if (a_date < b_date) | |
588 | return 1; | |
589 | if (a_date > b_date) | |
590 | return -1; | |
591 | return 0; | |
592 | } | |
593 | ||
594 | static void *commit_list_get_next(const void *a) | |
595 | { | |
596 | return ((const struct commit_list *)a)->next; | |
597 | } | |
598 | ||
599 | static void commit_list_set_next(void *a, void *next) | |
600 | { | |
601 | ((struct commit_list *)a)->next = next; | |
602 | } | |
603 | ||
604 | void commit_list_sort_by_date(struct commit_list **list) | |
605 | { | |
606 | *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, | |
607 | commit_list_compare_by_date); | |
608 | } | |
609 | ||
610 | struct commit *pop_most_recent_commit(struct commit_list **list, | |
611 | unsigned int mark) | |
612 | { | |
613 | struct commit *ret = pop_commit(list); | |
614 | struct commit_list *parents = ret->parents; | |
615 | ||
616 | while (parents) { | |
617 | struct commit *commit = parents->item; | |
618 | if (!parse_commit(commit) && !(commit->object.flags & mark)) { | |
619 | commit->object.flags |= mark; | |
620 | commit_list_insert_by_date(commit, list); | |
621 | } | |
622 | parents = parents->next; | |
623 | } | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static void clear_commit_marks_1(struct commit_list **plist, | |
628 | struct commit *commit, unsigned int mark) | |
629 | { | |
630 | while (commit) { | |
631 | struct commit_list *parents; | |
632 | ||
633 | if (!(mark & commit->object.flags)) | |
634 | return; | |
635 | ||
636 | commit->object.flags &= ~mark; | |
637 | ||
638 | parents = commit->parents; | |
639 | if (!parents) | |
640 | return; | |
641 | ||
642 | while ((parents = parents->next)) | |
643 | commit_list_insert(parents->item, plist); | |
644 | ||
645 | commit = commit->parents->item; | |
646 | } | |
647 | } | |
648 | ||
649 | void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark) | |
650 | { | |
651 | struct commit_list *list = NULL; | |
652 | ||
653 | while (nr--) { | |
654 | clear_commit_marks_1(&list, *commit, mark); | |
655 | commit++; | |
656 | } | |
657 | while (list) | |
658 | clear_commit_marks_1(&list, pop_commit(&list), mark); | |
659 | } | |
660 | ||
661 | void clear_commit_marks(struct commit *commit, unsigned int mark) | |
662 | { | |
663 | clear_commit_marks_many(1, &commit, mark); | |
664 | } | |
665 | ||
666 | struct commit *pop_commit(struct commit_list **stack) | |
667 | { | |
668 | struct commit_list *top = *stack; | |
669 | struct commit *item = top ? top->item : NULL; | |
670 | ||
671 | if (top) { | |
672 | *stack = top->next; | |
673 | free(top); | |
674 | } | |
675 | return item; | |
676 | } | |
677 | ||
678 | /* | |
679 | * Topological sort support | |
680 | */ | |
681 | ||
682 | /* count number of children that have not been emitted */ | |
683 | define_commit_slab(indegree_slab, int); | |
684 | ||
685 | define_commit_slab(author_date_slab, timestamp_t); | |
686 | ||
687 | void record_author_date(struct author_date_slab *author_date, | |
688 | struct commit *commit) | |
689 | { | |
690 | const char *buffer = get_commit_buffer(commit, NULL); | |
691 | struct ident_split ident; | |
692 | const char *ident_line; | |
693 | size_t ident_len; | |
694 | char *date_end; | |
695 | timestamp_t date; | |
696 | ||
697 | ident_line = find_commit_header(buffer, "author", &ident_len); | |
698 | if (!ident_line) | |
699 | goto fail_exit; /* no author line */ | |
700 | if (split_ident_line(&ident, ident_line, ident_len) || | |
701 | !ident.date_begin || !ident.date_end) | |
702 | goto fail_exit; /* malformed "author" line */ | |
703 | ||
704 | date = parse_timestamp(ident.date_begin, &date_end, 10); | |
705 | if (date_end != ident.date_end) | |
706 | goto fail_exit; /* malformed date */ | |
707 | *(author_date_slab_at(author_date, commit)) = date; | |
708 | ||
709 | fail_exit: | |
710 | unuse_commit_buffer(commit, buffer); | |
711 | } | |
712 | ||
713 | int compare_commits_by_author_date(const void *a_, const void *b_, | |
714 | void *cb_data) | |
715 | { | |
716 | const struct commit *a = a_, *b = b_; | |
717 | struct author_date_slab *author_date = cb_data; | |
718 | timestamp_t a_date = *(author_date_slab_at(author_date, a)); | |
719 | timestamp_t b_date = *(author_date_slab_at(author_date, b)); | |
720 | ||
721 | /* newer commits with larger date first */ | |
722 | if (a_date < b_date) | |
723 | return 1; | |
724 | else if (a_date > b_date) | |
725 | return -1; | |
726 | return 0; | |
727 | } | |
728 | ||
729 | int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused) | |
730 | { | |
731 | const struct commit *a = a_, *b = b_; | |
732 | const uint32_t generation_a = commit_graph_generation(a), | |
733 | generation_b = commit_graph_generation(b); | |
734 | ||
735 | /* newer commits first */ | |
736 | if (generation_a < generation_b) | |
737 | return 1; | |
738 | else if (generation_a > generation_b) | |
739 | return -1; | |
740 | ||
741 | /* use date as a heuristic when generations are equal */ | |
742 | if (a->date < b->date) | |
743 | return 1; | |
744 | else if (a->date > b->date) | |
745 | return -1; | |
746 | return 0; | |
747 | } | |
748 | ||
749 | int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) | |
750 | { | |
751 | const struct commit *a = a_, *b = b_; | |
752 | /* newer commits with larger date first */ | |
753 | if (a->date < b->date) | |
754 | return 1; | |
755 | else if (a->date > b->date) | |
756 | return -1; | |
757 | return 0; | |
758 | } | |
759 | ||
760 | /* | |
761 | * Performs an in-place topological sort on the list supplied. | |
762 | */ | |
763 | void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order) | |
764 | { | |
765 | struct commit_list *next, *orig = *list; | |
766 | struct commit_list **pptr; | |
767 | struct indegree_slab indegree; | |
768 | struct prio_queue queue; | |
769 | struct commit *commit; | |
770 | struct author_date_slab author_date; | |
771 | ||
772 | if (!orig) | |
773 | return; | |
774 | *list = NULL; | |
775 | ||
776 | init_indegree_slab(&indegree); | |
777 | memset(&queue, '\0', sizeof(queue)); | |
778 | ||
779 | switch (sort_order) { | |
780 | default: /* REV_SORT_IN_GRAPH_ORDER */ | |
781 | queue.compare = NULL; | |
782 | break; | |
783 | case REV_SORT_BY_COMMIT_DATE: | |
784 | queue.compare = compare_commits_by_commit_date; | |
785 | break; | |
786 | case REV_SORT_BY_AUTHOR_DATE: | |
787 | init_author_date_slab(&author_date); | |
788 | queue.compare = compare_commits_by_author_date; | |
789 | queue.cb_data = &author_date; | |
790 | break; | |
791 | } | |
792 | ||
793 | /* Mark them and clear the indegree */ | |
794 | for (next = orig; next; next = next->next) { | |
795 | struct commit *commit = next->item; | |
796 | *(indegree_slab_at(&indegree, commit)) = 1; | |
797 | /* also record the author dates, if needed */ | |
798 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
799 | record_author_date(&author_date, commit); | |
800 | } | |
801 | ||
802 | /* update the indegree */ | |
803 | for (next = orig; next; next = next->next) { | |
804 | struct commit_list *parents = next->item->parents; | |
805 | while (parents) { | |
806 | struct commit *parent = parents->item; | |
807 | int *pi = indegree_slab_at(&indegree, parent); | |
808 | ||
809 | if (*pi) | |
810 | (*pi)++; | |
811 | parents = parents->next; | |
812 | } | |
813 | } | |
814 | ||
815 | /* | |
816 | * find the tips | |
817 | * | |
818 | * tips are nodes not reachable from any other node in the list | |
819 | * | |
820 | * the tips serve as a starting set for the work queue. | |
821 | */ | |
822 | for (next = orig; next; next = next->next) { | |
823 | struct commit *commit = next->item; | |
824 | ||
825 | if (*(indegree_slab_at(&indegree, commit)) == 1) | |
826 | prio_queue_put(&queue, commit); | |
827 | } | |
828 | ||
829 | /* | |
830 | * This is unfortunate; the initial tips need to be shown | |
831 | * in the order given from the revision traversal machinery. | |
832 | */ | |
833 | if (sort_order == REV_SORT_IN_GRAPH_ORDER) | |
834 | prio_queue_reverse(&queue); | |
835 | ||
836 | /* We no longer need the commit list */ | |
837 | free_commit_list(orig); | |
838 | ||
839 | pptr = list; | |
840 | *list = NULL; | |
841 | while ((commit = prio_queue_get(&queue)) != NULL) { | |
842 | struct commit_list *parents; | |
843 | ||
844 | for (parents = commit->parents; parents ; parents = parents->next) { | |
845 | struct commit *parent = parents->item; | |
846 | int *pi = indegree_slab_at(&indegree, parent); | |
847 | ||
848 | if (!*pi) | |
849 | continue; | |
850 | ||
851 | /* | |
852 | * parents are only enqueued for emission | |
853 | * when all their children have been emitted thereby | |
854 | * guaranteeing topological order. | |
855 | */ | |
856 | if (--(*pi) == 1) | |
857 | prio_queue_put(&queue, parent); | |
858 | } | |
859 | /* | |
860 | * all children of commit have already been | |
861 | * emitted. we can emit it now. | |
862 | */ | |
863 | *(indegree_slab_at(&indegree, commit)) = 0; | |
864 | ||
865 | pptr = &commit_list_insert(commit, pptr)->next; | |
866 | } | |
867 | ||
868 | clear_indegree_slab(&indegree); | |
869 | clear_prio_queue(&queue); | |
870 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
871 | clear_author_date_slab(&author_date); | |
872 | } | |
873 | ||
874 | struct rev_collect { | |
875 | struct commit **commit; | |
876 | int nr; | |
877 | int alloc; | |
878 | unsigned int initial : 1; | |
879 | }; | |
880 | ||
881 | static void add_one_commit(struct object_id *oid, struct rev_collect *revs) | |
882 | { | |
883 | struct commit *commit; | |
884 | ||
885 | if (is_null_oid(oid)) | |
886 | return; | |
887 | ||
888 | commit = lookup_commit(the_repository, oid); | |
889 | if (!commit || | |
890 | (commit->object.flags & TMP_MARK) || | |
891 | parse_commit(commit)) | |
892 | return; | |
893 | ||
894 | ALLOC_GROW(revs->commit, revs->nr + 1, revs->alloc); | |
895 | revs->commit[revs->nr++] = commit; | |
896 | commit->object.flags |= TMP_MARK; | |
897 | } | |
898 | ||
899 | static int collect_one_reflog_ent(struct object_id *ooid, struct object_id *noid, | |
900 | const char *ident, timestamp_t timestamp, | |
901 | int tz, const char *message, void *cbdata) | |
902 | { | |
903 | struct rev_collect *revs = cbdata; | |
904 | ||
905 | if (revs->initial) { | |
906 | revs->initial = 0; | |
907 | add_one_commit(ooid, revs); | |
908 | } | |
909 | add_one_commit(noid, revs); | |
910 | return 0; | |
911 | } | |
912 | ||
913 | struct commit *get_fork_point(const char *refname, struct commit *commit) | |
914 | { | |
915 | struct object_id oid; | |
916 | struct rev_collect revs; | |
917 | struct commit_list *bases; | |
918 | int i; | |
919 | struct commit *ret = NULL; | |
920 | char *full_refname; | |
921 | ||
922 | switch (dwim_ref(refname, strlen(refname), &oid, &full_refname)) { | |
923 | case 0: | |
924 | die("No such ref: '%s'", refname); | |
925 | case 1: | |
926 | break; /* good */ | |
927 | default: | |
928 | die("Ambiguous refname: '%s'", refname); | |
929 | } | |
930 | ||
931 | memset(&revs, 0, sizeof(revs)); | |
932 | revs.initial = 1; | |
933 | for_each_reflog_ent(full_refname, collect_one_reflog_ent, &revs); | |
934 | ||
935 | if (!revs.nr) | |
936 | add_one_commit(&oid, &revs); | |
937 | ||
938 | for (i = 0; i < revs.nr; i++) | |
939 | revs.commit[i]->object.flags &= ~TMP_MARK; | |
940 | ||
941 | bases = get_merge_bases_many(commit, revs.nr, revs.commit); | |
942 | ||
943 | /* | |
944 | * There should be one and only one merge base, when we found | |
945 | * a common ancestor among reflog entries. | |
946 | */ | |
947 | if (!bases || bases->next) | |
948 | goto cleanup_return; | |
949 | ||
950 | /* And the found one must be one of the reflog entries */ | |
951 | for (i = 0; i < revs.nr; i++) | |
952 | if (&bases->item->object == &revs.commit[i]->object) | |
953 | break; /* found */ | |
954 | if (revs.nr <= i) | |
955 | goto cleanup_return; | |
956 | ||
957 | ret = bases->item; | |
958 | ||
959 | cleanup_return: | |
960 | free_commit_list(bases); | |
961 | free(full_refname); | |
962 | return ret; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Indexed by hash algorithm identifier. | |
967 | */ | |
968 | static const char *gpg_sig_headers[] = { | |
969 | NULL, | |
970 | "gpgsig", | |
971 | "gpgsig-sha256", | |
972 | }; | |
973 | ||
974 | static int do_sign_commit(struct strbuf *buf, const char *keyid) | |
975 | { | |
976 | struct strbuf sig = STRBUF_INIT; | |
977 | int inspos, copypos; | |
978 | const char *eoh; | |
979 | const char *gpg_sig_header = gpg_sig_headers[hash_algo_by_ptr(the_hash_algo)]; | |
980 | int gpg_sig_header_len = strlen(gpg_sig_header); | |
981 | ||
982 | /* find the end of the header */ | |
983 | eoh = strstr(buf->buf, "\n\n"); | |
984 | if (!eoh) | |
985 | inspos = buf->len; | |
986 | else | |
987 | inspos = eoh - buf->buf + 1; | |
988 | ||
989 | if (!keyid || !*keyid) | |
990 | keyid = get_signing_key(); | |
991 | if (sign_buffer(buf, &sig, keyid)) { | |
992 | strbuf_release(&sig); | |
993 | return -1; | |
994 | } | |
995 | ||
996 | for (copypos = 0; sig.buf[copypos]; ) { | |
997 | const char *bol = sig.buf + copypos; | |
998 | const char *eol = strchrnul(bol, '\n'); | |
999 | int len = (eol - bol) + !!*eol; | |
1000 | ||
1001 | if (!copypos) { | |
1002 | strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); | |
1003 | inspos += gpg_sig_header_len; | |
1004 | } | |
1005 | strbuf_insertstr(buf, inspos++, " "); | |
1006 | strbuf_insert(buf, inspos, bol, len); | |
1007 | inspos += len; | |
1008 | copypos += len; | |
1009 | } | |
1010 | strbuf_release(&sig); | |
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | int parse_signed_commit(const struct commit *commit, | |
1015 | struct strbuf *payload, struct strbuf *signature) | |
1016 | { | |
1017 | ||
1018 | unsigned long size; | |
1019 | const char *buffer = get_commit_buffer(commit, &size); | |
1020 | int in_signature, saw_signature = -1; | |
1021 | const char *line, *tail; | |
1022 | const char *gpg_sig_header = gpg_sig_headers[hash_algo_by_ptr(the_hash_algo)]; | |
1023 | int gpg_sig_header_len = strlen(gpg_sig_header); | |
1024 | ||
1025 | line = buffer; | |
1026 | tail = buffer + size; | |
1027 | in_signature = 0; | |
1028 | saw_signature = 0; | |
1029 | while (line < tail) { | |
1030 | const char *sig = NULL; | |
1031 | const char *next = memchr(line, '\n', tail - line); | |
1032 | ||
1033 | next = next ? next + 1 : tail; | |
1034 | if (in_signature && line[0] == ' ') | |
1035 | sig = line + 1; | |
1036 | else if (starts_with(line, gpg_sig_header) && | |
1037 | line[gpg_sig_header_len] == ' ') | |
1038 | sig = line + gpg_sig_header_len + 1; | |
1039 | if (sig) { | |
1040 | strbuf_add(signature, sig, next - sig); | |
1041 | saw_signature = 1; | |
1042 | in_signature = 1; | |
1043 | } else { | |
1044 | if (*line == '\n') | |
1045 | /* dump the whole remainder of the buffer */ | |
1046 | next = tail; | |
1047 | strbuf_add(payload, line, next - line); | |
1048 | in_signature = 0; | |
1049 | } | |
1050 | line = next; | |
1051 | } | |
1052 | unuse_commit_buffer(commit, buffer); | |
1053 | return saw_signature; | |
1054 | } | |
1055 | ||
1056 | int remove_signature(struct strbuf *buf) | |
1057 | { | |
1058 | const char *line = buf->buf; | |
1059 | const char *tail = buf->buf + buf->len; | |
1060 | int in_signature = 0; | |
1061 | const char *sig_start = NULL; | |
1062 | const char *sig_end = NULL; | |
1063 | ||
1064 | while (line < tail) { | |
1065 | const char *next = memchr(line, '\n', tail - line); | |
1066 | next = next ? next + 1 : tail; | |
1067 | ||
1068 | if (in_signature && line[0] == ' ') | |
1069 | sig_end = next; | |
1070 | else if (starts_with(line, "gpgsig")) { | |
1071 | int i; | |
1072 | for (i = 1; i < GIT_HASH_NALGOS; i++) { | |
1073 | const char *p; | |
1074 | if (skip_prefix(line, gpg_sig_headers[i], &p) && | |
1075 | *p == ' ') { | |
1076 | sig_start = line; | |
1077 | sig_end = next; | |
1078 | in_signature = 1; | |
1079 | } | |
1080 | } | |
1081 | } else { | |
1082 | if (*line == '\n') | |
1083 | /* dump the whole remainder of the buffer */ | |
1084 | next = tail; | |
1085 | in_signature = 0; | |
1086 | } | |
1087 | line = next; | |
1088 | } | |
1089 | ||
1090 | if (sig_start) | |
1091 | strbuf_remove(buf, sig_start - buf->buf, sig_end - sig_start); | |
1092 | ||
1093 | return sig_start != NULL; | |
1094 | } | |
1095 | ||
1096 | static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) | |
1097 | { | |
1098 | struct merge_remote_desc *desc; | |
1099 | struct commit_extra_header *mergetag; | |
1100 | char *buf; | |
1101 | unsigned long size, len; | |
1102 | enum object_type type; | |
1103 | ||
1104 | desc = merge_remote_util(parent); | |
1105 | if (!desc || !desc->obj) | |
1106 | return; | |
1107 | buf = read_object_file(&desc->obj->oid, &type, &size); | |
1108 | if (!buf || type != OBJ_TAG) | |
1109 | goto free_return; | |
1110 | len = parse_signature(buf, size); | |
1111 | if (size == len) | |
1112 | goto free_return; | |
1113 | /* | |
1114 | * We could verify this signature and either omit the tag when | |
1115 | * it does not validate, but the integrator may not have the | |
1116 | * public key of the signer of the tag he is merging, while a | |
1117 | * later auditor may have it while auditing, so let's not run | |
1118 | * verify-signed-buffer here for now... | |
1119 | * | |
1120 | * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) | |
1121 | * warn("warning: signed tag unverified."); | |
1122 | */ | |
1123 | mergetag = xcalloc(1, sizeof(*mergetag)); | |
1124 | mergetag->key = xstrdup("mergetag"); | |
1125 | mergetag->value = buf; | |
1126 | mergetag->len = size; | |
1127 | ||
1128 | **tail = mergetag; | |
1129 | *tail = &mergetag->next; | |
1130 | return; | |
1131 | ||
1132 | free_return: | |
1133 | free(buf); | |
1134 | } | |
1135 | ||
1136 | int check_commit_signature(const struct commit *commit, struct signature_check *sigc) | |
1137 | { | |
1138 | struct strbuf payload = STRBUF_INIT; | |
1139 | struct strbuf signature = STRBUF_INIT; | |
1140 | int ret = 1; | |
1141 | ||
1142 | sigc->result = 'N'; | |
1143 | ||
1144 | if (parse_signed_commit(commit, &payload, &signature) <= 0) | |
1145 | goto out; | |
1146 | ret = check_signature(payload.buf, payload.len, signature.buf, | |
1147 | signature.len, sigc); | |
1148 | ||
1149 | out: | |
1150 | strbuf_release(&payload); | |
1151 | strbuf_release(&signature); | |
1152 | ||
1153 | return ret; | |
1154 | } | |
1155 | ||
1156 | void verify_merge_signature(struct commit *commit, int verbosity, | |
1157 | int check_trust) | |
1158 | { | |
1159 | char hex[GIT_MAX_HEXSZ + 1]; | |
1160 | struct signature_check signature_check; | |
1161 | int ret; | |
1162 | memset(&signature_check, 0, sizeof(signature_check)); | |
1163 | ||
1164 | ret = check_commit_signature(commit, &signature_check); | |
1165 | ||
1166 | find_unique_abbrev_r(hex, &commit->object.oid, DEFAULT_ABBREV); | |
1167 | switch (signature_check.result) { | |
1168 | case 'G': | |
1169 | if (ret || (check_trust && signature_check.trust_level < TRUST_MARGINAL)) | |
1170 | die(_("Commit %s has an untrusted GPG signature, " | |
1171 | "allegedly by %s."), hex, signature_check.signer); | |
1172 | break; | |
1173 | case 'B': | |
1174 | die(_("Commit %s has a bad GPG signature " | |
1175 | "allegedly by %s."), hex, signature_check.signer); | |
1176 | default: /* 'N' */ | |
1177 | die(_("Commit %s does not have a GPG signature."), hex); | |
1178 | } | |
1179 | if (verbosity >= 0 && signature_check.result == 'G') | |
1180 | printf(_("Commit %s has a good GPG signature by %s\n"), | |
1181 | hex, signature_check.signer); | |
1182 | ||
1183 | signature_check_clear(&signature_check); | |
1184 | } | |
1185 | ||
1186 | void append_merge_tag_headers(struct commit_list *parents, | |
1187 | struct commit_extra_header ***tail) | |
1188 | { | |
1189 | while (parents) { | |
1190 | struct commit *parent = parents->item; | |
1191 | handle_signed_tag(parent, tail); | |
1192 | parents = parents->next; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | static void add_extra_header(struct strbuf *buffer, | |
1197 | struct commit_extra_header *extra) | |
1198 | { | |
1199 | strbuf_addstr(buffer, extra->key); | |
1200 | if (extra->len) | |
1201 | strbuf_add_lines(buffer, " ", extra->value, extra->len); | |
1202 | else | |
1203 | strbuf_addch(buffer, '\n'); | |
1204 | } | |
1205 | ||
1206 | struct commit_extra_header *read_commit_extra_headers(struct commit *commit, | |
1207 | const char **exclude) | |
1208 | { | |
1209 | struct commit_extra_header *extra = NULL; | |
1210 | unsigned long size; | |
1211 | const char *buffer = get_commit_buffer(commit, &size); | |
1212 | extra = read_commit_extra_header_lines(buffer, size, exclude); | |
1213 | unuse_commit_buffer(commit, buffer); | |
1214 | return extra; | |
1215 | } | |
1216 | ||
1217 | int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) | |
1218 | { | |
1219 | struct commit_extra_header *extra, *to_free; | |
1220 | int res = 0; | |
1221 | ||
1222 | to_free = read_commit_extra_headers(commit, NULL); | |
1223 | for (extra = to_free; !res && extra; extra = extra->next) { | |
1224 | if (strcmp(extra->key, "mergetag")) | |
1225 | continue; /* not a merge tag */ | |
1226 | res = fn(commit, extra, data); | |
1227 | } | |
1228 | free_commit_extra_headers(to_free); | |
1229 | return res; | |
1230 | } | |
1231 | ||
1232 | static inline int standard_header_field(const char *field, size_t len) | |
1233 | { | |
1234 | return ((len == 4 && !memcmp(field, "tree", 4)) || | |
1235 | (len == 6 && !memcmp(field, "parent", 6)) || | |
1236 | (len == 6 && !memcmp(field, "author", 6)) || | |
1237 | (len == 9 && !memcmp(field, "committer", 9)) || | |
1238 | (len == 8 && !memcmp(field, "encoding", 8))); | |
1239 | } | |
1240 | ||
1241 | static int excluded_header_field(const char *field, size_t len, const char **exclude) | |
1242 | { | |
1243 | if (!exclude) | |
1244 | return 0; | |
1245 | ||
1246 | while (*exclude) { | |
1247 | size_t xlen = strlen(*exclude); | |
1248 | if (len == xlen && !memcmp(field, *exclude, xlen)) | |
1249 | return 1; | |
1250 | exclude++; | |
1251 | } | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | static struct commit_extra_header *read_commit_extra_header_lines( | |
1256 | const char *buffer, size_t size, | |
1257 | const char **exclude) | |
1258 | { | |
1259 | struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; | |
1260 | const char *line, *next, *eof, *eob; | |
1261 | struct strbuf buf = STRBUF_INIT; | |
1262 | ||
1263 | for (line = buffer, eob = line + size; | |
1264 | line < eob && *line != '\n'; | |
1265 | line = next) { | |
1266 | next = memchr(line, '\n', eob - line); | |
1267 | next = next ? next + 1 : eob; | |
1268 | if (*line == ' ') { | |
1269 | /* continuation */ | |
1270 | if (it) | |
1271 | strbuf_add(&buf, line + 1, next - (line + 1)); | |
1272 | continue; | |
1273 | } | |
1274 | if (it) | |
1275 | it->value = strbuf_detach(&buf, &it->len); | |
1276 | strbuf_reset(&buf); | |
1277 | it = NULL; | |
1278 | ||
1279 | eof = memchr(line, ' ', next - line); | |
1280 | if (!eof) | |
1281 | eof = next; | |
1282 | else if (standard_header_field(line, eof - line) || | |
1283 | excluded_header_field(line, eof - line, exclude)) | |
1284 | continue; | |
1285 | ||
1286 | it = xcalloc(1, sizeof(*it)); | |
1287 | it->key = xmemdupz(line, eof-line); | |
1288 | *tail = it; | |
1289 | tail = &it->next; | |
1290 | if (eof + 1 < next) | |
1291 | strbuf_add(&buf, eof + 1, next - (eof + 1)); | |
1292 | } | |
1293 | if (it) | |
1294 | it->value = strbuf_detach(&buf, &it->len); | |
1295 | return extra; | |
1296 | } | |
1297 | ||
1298 | void free_commit_extra_headers(struct commit_extra_header *extra) | |
1299 | { | |
1300 | while (extra) { | |
1301 | struct commit_extra_header *next = extra->next; | |
1302 | free(extra->key); | |
1303 | free(extra->value); | |
1304 | free(extra); | |
1305 | extra = next; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, | |
1310 | struct commit_list *parents, struct object_id *ret, | |
1311 | const char *author, const char *sign_commit) | |
1312 | { | |
1313 | struct commit_extra_header *extra = NULL, **tail = &extra; | |
1314 | int result; | |
1315 | ||
1316 | append_merge_tag_headers(parents, &tail); | |
1317 | result = commit_tree_extended(msg, msg_len, tree, parents, ret, | |
1318 | author, sign_commit, extra); | |
1319 | free_commit_extra_headers(extra); | |
1320 | return result; | |
1321 | } | |
1322 | ||
1323 | static int find_invalid_utf8(const char *buf, int len) | |
1324 | { | |
1325 | int offset = 0; | |
1326 | static const unsigned int max_codepoint[] = { | |
1327 | 0x7f, 0x7ff, 0xffff, 0x10ffff | |
1328 | }; | |
1329 | ||
1330 | while (len) { | |
1331 | unsigned char c = *buf++; | |
1332 | int bytes, bad_offset; | |
1333 | unsigned int codepoint; | |
1334 | unsigned int min_val, max_val; | |
1335 | ||
1336 | len--; | |
1337 | offset++; | |
1338 | ||
1339 | /* Simple US-ASCII? No worries. */ | |
1340 | if (c < 0x80) | |
1341 | continue; | |
1342 | ||
1343 | bad_offset = offset-1; | |
1344 | ||
1345 | /* | |
1346 | * Count how many more high bits set: that's how | |
1347 | * many more bytes this sequence should have. | |
1348 | */ | |
1349 | bytes = 0; | |
1350 | while (c & 0x40) { | |
1351 | c <<= 1; | |
1352 | bytes++; | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Must be between 1 and 3 more bytes. Longer sequences result in | |
1357 | * codepoints beyond U+10FFFF, which are guaranteed never to exist. | |
1358 | */ | |
1359 | if (bytes < 1 || 3 < bytes) | |
1360 | return bad_offset; | |
1361 | ||
1362 | /* Do we *have* that many bytes? */ | |
1363 | if (len < bytes) | |
1364 | return bad_offset; | |
1365 | ||
1366 | /* | |
1367 | * Place the encoded bits at the bottom of the value and compute the | |
1368 | * valid range. | |
1369 | */ | |
1370 | codepoint = (c & 0x7f) >> bytes; | |
1371 | min_val = max_codepoint[bytes-1] + 1; | |
1372 | max_val = max_codepoint[bytes]; | |
1373 | ||
1374 | offset += bytes; | |
1375 | len -= bytes; | |
1376 | ||
1377 | /* And verify that they are good continuation bytes */ | |
1378 | do { | |
1379 | codepoint <<= 6; | |
1380 | codepoint |= *buf & 0x3f; | |
1381 | if ((*buf++ & 0xc0) != 0x80) | |
1382 | return bad_offset; | |
1383 | } while (--bytes); | |
1384 | ||
1385 | /* Reject codepoints that are out of range for the sequence length. */ | |
1386 | if (codepoint < min_val || codepoint > max_val) | |
1387 | return bad_offset; | |
1388 | /* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */ | |
1389 | if ((codepoint & 0x1ff800) == 0xd800) | |
1390 | return bad_offset; | |
1391 | /* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */ | |
1392 | if ((codepoint & 0xfffe) == 0xfffe) | |
1393 | return bad_offset; | |
1394 | /* So are anything in the range U+FDD0..U+FDEF. */ | |
1395 | if (codepoint >= 0xfdd0 && codepoint <= 0xfdef) | |
1396 | return bad_offset; | |
1397 | } | |
1398 | return -1; | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * This verifies that the buffer is in proper utf8 format. | |
1403 | * | |
1404 | * If it isn't, it assumes any non-utf8 characters are Latin1, | |
1405 | * and does the conversion. | |
1406 | */ | |
1407 | static int verify_utf8(struct strbuf *buf) | |
1408 | { | |
1409 | int ok = 1; | |
1410 | long pos = 0; | |
1411 | ||
1412 | for (;;) { | |
1413 | int bad; | |
1414 | unsigned char c; | |
1415 | unsigned char replace[2]; | |
1416 | ||
1417 | bad = find_invalid_utf8(buf->buf + pos, buf->len - pos); | |
1418 | if (bad < 0) | |
1419 | return ok; | |
1420 | pos += bad; | |
1421 | ok = 0; | |
1422 | c = buf->buf[pos]; | |
1423 | strbuf_remove(buf, pos, 1); | |
1424 | ||
1425 | /* We know 'c' must be in the range 128-255 */ | |
1426 | replace[0] = 0xc0 + (c >> 6); | |
1427 | replace[1] = 0x80 + (c & 0x3f); | |
1428 | strbuf_insert(buf, pos, replace, 2); | |
1429 | pos += 2; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | static const char commit_utf8_warn[] = | |
1434 | N_("Warning: commit message did not conform to UTF-8.\n" | |
1435 | "You may want to amend it after fixing the message, or set the config\n" | |
1436 | "variable i18n.commitencoding to the encoding your project uses.\n"); | |
1437 | ||
1438 | int commit_tree_extended(const char *msg, size_t msg_len, | |
1439 | const struct object_id *tree, | |
1440 | struct commit_list *parents, struct object_id *ret, | |
1441 | const char *author, const char *sign_commit, | |
1442 | struct commit_extra_header *extra) | |
1443 | { | |
1444 | int result; | |
1445 | int encoding_is_utf8; | |
1446 | struct strbuf buffer; | |
1447 | ||
1448 | assert_oid_type(tree, OBJ_TREE); | |
1449 | ||
1450 | if (memchr(msg, '\0', msg_len)) | |
1451 | return error("a NUL byte in commit log message not allowed."); | |
1452 | ||
1453 | /* Not having i18n.commitencoding is the same as having utf-8 */ | |
1454 | encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); | |
1455 | ||
1456 | strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ | |
1457 | strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); | |
1458 | ||
1459 | /* | |
1460 | * NOTE! This ordering means that the same exact tree merged with a | |
1461 | * different order of parents will be a _different_ changeset even | |
1462 | * if everything else stays the same. | |
1463 | */ | |
1464 | while (parents) { | |
1465 | struct commit *parent = pop_commit(&parents); | |
1466 | strbuf_addf(&buffer, "parent %s\n", | |
1467 | oid_to_hex(&parent->object.oid)); | |
1468 | } | |
1469 | ||
1470 | /* Person/date information */ | |
1471 | if (!author) | |
1472 | author = git_author_info(IDENT_STRICT); | |
1473 | strbuf_addf(&buffer, "author %s\n", author); | |
1474 | strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); | |
1475 | if (!encoding_is_utf8) | |
1476 | strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); | |
1477 | ||
1478 | while (extra) { | |
1479 | add_extra_header(&buffer, extra); | |
1480 | extra = extra->next; | |
1481 | } | |
1482 | strbuf_addch(&buffer, '\n'); | |
1483 | ||
1484 | /* And add the comment */ | |
1485 | strbuf_add(&buffer, msg, msg_len); | |
1486 | ||
1487 | /* And check the encoding */ | |
1488 | if (encoding_is_utf8 && !verify_utf8(&buffer)) | |
1489 | fprintf(stderr, _(commit_utf8_warn)); | |
1490 | ||
1491 | if (sign_commit && do_sign_commit(&buffer, sign_commit)) { | |
1492 | result = -1; | |
1493 | goto out; | |
1494 | } | |
1495 | ||
1496 | result = write_object_file(buffer.buf, buffer.len, commit_type, ret); | |
1497 | out: | |
1498 | strbuf_release(&buffer); | |
1499 | return result; | |
1500 | } | |
1501 | ||
1502 | define_commit_slab(merge_desc_slab, struct merge_remote_desc *); | |
1503 | static struct merge_desc_slab merge_desc_slab = COMMIT_SLAB_INIT(1, merge_desc_slab); | |
1504 | ||
1505 | struct merge_remote_desc *merge_remote_util(struct commit *commit) | |
1506 | { | |
1507 | return *merge_desc_slab_at(&merge_desc_slab, commit); | |
1508 | } | |
1509 | ||
1510 | void set_merge_remote_desc(struct commit *commit, | |
1511 | const char *name, struct object *obj) | |
1512 | { | |
1513 | struct merge_remote_desc *desc; | |
1514 | FLEX_ALLOC_STR(desc, name, name); | |
1515 | desc->obj = obj; | |
1516 | *merge_desc_slab_at(&merge_desc_slab, commit) = desc; | |
1517 | } | |
1518 | ||
1519 | struct commit *get_merge_parent(const char *name) | |
1520 | { | |
1521 | struct object *obj; | |
1522 | struct commit *commit; | |
1523 | struct object_id oid; | |
1524 | if (get_oid(name, &oid)) | |
1525 | return NULL; | |
1526 | obj = parse_object(the_repository, &oid); | |
1527 | commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); | |
1528 | if (commit && !merge_remote_util(commit)) | |
1529 | set_merge_remote_desc(commit, name, obj); | |
1530 | return commit; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * Append a commit to the end of the commit_list. | |
1535 | * | |
1536 | * next starts by pointing to the variable that holds the head of an | |
1537 | * empty commit_list, and is updated to point to the "next" field of | |
1538 | * the last item on the list as new commits are appended. | |
1539 | * | |
1540 | * Usage example: | |
1541 | * | |
1542 | * struct commit_list *list; | |
1543 | * struct commit_list **next = &list; | |
1544 | * | |
1545 | * next = commit_list_append(c1, next); | |
1546 | * next = commit_list_append(c2, next); | |
1547 | * assert(commit_list_count(list) == 2); | |
1548 | * return list; | |
1549 | */ | |
1550 | struct commit_list **commit_list_append(struct commit *commit, | |
1551 | struct commit_list **next) | |
1552 | { | |
1553 | struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); | |
1554 | new_commit->item = commit; | |
1555 | *next = new_commit; | |
1556 | new_commit->next = NULL; | |
1557 | return &new_commit->next; | |
1558 | } | |
1559 | ||
1560 | const char *find_commit_header(const char *msg, const char *key, size_t *out_len) | |
1561 | { | |
1562 | int key_len = strlen(key); | |
1563 | const char *line = msg; | |
1564 | ||
1565 | while (line) { | |
1566 | const char *eol = strchrnul(line, '\n'); | |
1567 | ||
1568 | if (line == eol) | |
1569 | return NULL; | |
1570 | ||
1571 | if (eol - line > key_len && | |
1572 | !strncmp(line, key, key_len) && | |
1573 | line[key_len] == ' ') { | |
1574 | *out_len = eol - line - key_len - 1; | |
1575 | return line + key_len + 1; | |
1576 | } | |
1577 | line = *eol ? eol + 1 : NULL; | |
1578 | } | |
1579 | return NULL; | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Inspect the given string and determine the true "end" of the log message, in | |
1584 | * order to find where to put a new Signed-off-by: line. Ignored are | |
1585 | * trailing comment lines and blank lines. To support "git commit -s | |
1586 | * --amend" on an existing commit, we also ignore "Conflicts:". To | |
1587 | * support "git commit -v", we truncate at cut lines. | |
1588 | * | |
1589 | * Returns the number of bytes from the tail to ignore, to be fed as | |
1590 | * the second parameter to append_signoff(). | |
1591 | */ | |
1592 | size_t ignore_non_trailer(const char *buf, size_t len) | |
1593 | { | |
1594 | size_t boc = 0; | |
1595 | size_t bol = 0; | |
1596 | int in_old_conflicts_block = 0; | |
1597 | size_t cutoff = wt_status_locate_end(buf, len); | |
1598 | ||
1599 | while (bol < cutoff) { | |
1600 | const char *next_line = memchr(buf + bol, '\n', len - bol); | |
1601 | ||
1602 | if (!next_line) | |
1603 | next_line = buf + len; | |
1604 | else | |
1605 | next_line++; | |
1606 | ||
1607 | if (buf[bol] == comment_line_char || buf[bol] == '\n') { | |
1608 | /* is this the first of the run of comments? */ | |
1609 | if (!boc) | |
1610 | boc = bol; | |
1611 | /* otherwise, it is just continuing */ | |
1612 | } else if (starts_with(buf + bol, "Conflicts:\n")) { | |
1613 | in_old_conflicts_block = 1; | |
1614 | if (!boc) | |
1615 | boc = bol; | |
1616 | } else if (in_old_conflicts_block && buf[bol] == '\t') { | |
1617 | ; /* a pathname in the conflicts block */ | |
1618 | } else if (boc) { | |
1619 | /* the previous was not trailing comment */ | |
1620 | boc = 0; | |
1621 | in_old_conflicts_block = 0; | |
1622 | } | |
1623 | bol = next_line - buf; | |
1624 | } | |
1625 | return boc ? len - boc : len - cutoff; | |
1626 | } | |
1627 | ||
1628 | int run_commit_hook(int editor_is_used, const char *index_file, | |
1629 | const char *name, ...) | |
1630 | { | |
1631 | struct argv_array hook_env = ARGV_ARRAY_INIT; | |
1632 | va_list args; | |
1633 | int ret; | |
1634 | ||
1635 | argv_array_pushf(&hook_env, "GIT_INDEX_FILE=%s", index_file); | |
1636 | ||
1637 | /* | |
1638 | * Let the hook know that no editor will be launched. | |
1639 | */ | |
1640 | if (!editor_is_used) | |
1641 | argv_array_push(&hook_env, "GIT_EDITOR=:"); | |
1642 | ||
1643 | va_start(args, name); | |
1644 | ret = run_hook_ve(hook_env.argv,name, args); | |
1645 | va_end(args); | |
1646 | argv_array_clear(&hook_env); | |
1647 | ||
1648 | return ret; | |
1649 | } |