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Commit | Line | Data |
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ed09aef0 | 1 | #include "cache.h" |
3f5787f8 | 2 | #include "repository.h" |
6e122b44 | 3 | #include "tempfile.h" |
697cc8ef | 4 | #include "lockfile.h" |
cbd53a21 | 5 | #include "object-store.h" |
ed09aef0 | 6 | #include "commit.h" |
abef3a16 | 7 | #include "tag.h" |
3125fe52 | 8 | #include "pkt-line.h" |
58babfff NTND |
9 | #include "remote.h" |
10 | #include "refs.h" | |
11 | #include "sha1-array.h" | |
12 | #include "diff.h" | |
13 | #include "revision.h" | |
14 | #include "commit-slab.h" | |
3d9ff4d7 NTND |
15 | #include "revision.h" |
16 | #include "list-objects.h" | |
58dbe58f | 17 | #include "commit-slab.h" |
eee4502b | 18 | #include "repository.h" |
64043556 | 19 | #include "commit-reach.h" |
ed09aef0 | 20 | |
eee4502b | 21 | void set_alternate_shallow_file(struct repository *r, const char *path, int override) |
6035d6aa | 22 | { |
eee4502b | 23 | if (r->parsed_objects->is_shallow != -1) |
033abf97 | 24 | BUG("is_repository_shallow must not be called before set_alternate_shallow_file"); |
eee4502b | 25 | if (r->parsed_objects->alternate_shallow_file && !override) |
069c0532 | 26 | return; |
eee4502b SB |
27 | free(r->parsed_objects->alternate_shallow_file); |
28 | r->parsed_objects->alternate_shallow_file = xstrdup_or_null(path); | |
6035d6aa | 29 | } |
ed09aef0 | 30 | |
eee4502b | 31 | int register_shallow(struct repository *r, const struct object_id *oid) |
ed09aef0 JS |
32 | { |
33 | struct commit_graft *graft = | |
34 | xmalloc(sizeof(struct commit_graft)); | |
c1f5eb49 | 35 | struct commit *commit = lookup_commit(the_repository, oid); |
ed09aef0 | 36 | |
e92b848c | 37 | oidcpy(&graft->oid, oid); |
ed09aef0 JS |
38 | graft->nr_parent = -1; |
39 | if (commit && commit->object.parsed) | |
40 | commit->parents = NULL; | |
eee4502b | 41 | return register_commit_graft(r, graft, 0); |
ed09aef0 JS |
42 | } |
43 | ||
eee4502b | 44 | int is_repository_shallow(struct repository *r) |
ed09aef0 | 45 | { |
bd0b42ae JT |
46 | /* |
47 | * NEEDSWORK: This function updates | |
48 | * r->parsed_objects->{is_shallow,shallow_stat} as a side effect but | |
49 | * there is no corresponding function to clear them when the shallow | |
50 | * file is updated. | |
51 | */ | |
52 | ||
ed09aef0 JS |
53 | FILE *fp; |
54 | char buf[1024]; | |
eee4502b | 55 | const char *path = r->parsed_objects->alternate_shallow_file; |
ed09aef0 | 56 | |
eee4502b SB |
57 | if (r->parsed_objects->is_shallow >= 0) |
58 | return r->parsed_objects->is_shallow; | |
ed09aef0 | 59 | |
6035d6aa | 60 | if (!path) |
eee4502b | 61 | path = git_path_shallow(r); |
6035d6aa NTND |
62 | /* |
63 | * fetch-pack sets '--shallow-file ""' as an indicator that no | |
64 | * shallow file should be used. We could just open it and it | |
65 | * will likely fail. But let's do an explicit check instead. | |
66 | */ | |
0cc77c38 | 67 | if (!*path || (fp = fopen(path, "r")) == NULL) { |
eee4502b SB |
68 | stat_validity_clear(r->parsed_objects->shallow_stat); |
69 | r->parsed_objects->is_shallow = 0; | |
70 | return r->parsed_objects->is_shallow; | |
ed09aef0 | 71 | } |
eee4502b SB |
72 | stat_validity_update(r->parsed_objects->shallow_stat, fileno(fp)); |
73 | r->parsed_objects->is_shallow = 1; | |
ed09aef0 JS |
74 | |
75 | while (fgets(buf, sizeof(buf), fp)) { | |
e92b848c | 76 | struct object_id oid; |
77 | if (get_oid_hex(buf, &oid)) | |
ed09aef0 | 78 | die("bad shallow line: %s", buf); |
eee4502b | 79 | register_shallow(r, &oid); |
ed09aef0 JS |
80 | } |
81 | fclose(fp); | |
eee4502b | 82 | return r->parsed_objects->is_shallow; |
ed09aef0 JS |
83 | } |
84 | ||
58dbe58f NTND |
85 | /* |
86 | * TODO: use "int" elemtype instead of "int *" when/if commit-slab | |
87 | * supports a "valid" flag. | |
88 | */ | |
89 | define_commit_slab(commit_depth, int *); | |
f53514bc JS |
90 | struct commit_list *get_shallow_commits(struct object_array *heads, int depth, |
91 | int shallow_flag, int not_shallow_flag) | |
ed09aef0 JS |
92 | { |
93 | int i = 0, cur_depth = 0; | |
94 | struct commit_list *result = NULL; | |
3cd47459 | 95 | struct object_array stack = OBJECT_ARRAY_INIT; |
ed09aef0 | 96 | struct commit *commit = NULL; |
79d3a236 | 97 | struct commit_graft *graft; |
58dbe58f | 98 | struct commit_depth depths; |
ed09aef0 | 99 | |
58dbe58f | 100 | init_commit_depth(&depths); |
ed09aef0 JS |
101 | while (commit || i < heads->nr || stack.nr) { |
102 | struct commit_list *p; | |
103 | if (!commit) { | |
104 | if (i < heads->nr) { | |
58dbe58f | 105 | int **depth_slot; |
ed09aef0 | 106 | commit = (struct commit *) |
a74093da SB |
107 | deref_tag(the_repository, |
108 | heads->objects[i++].item, | |
109 | NULL, 0); | |
affeef12 | 110 | if (!commit || commit->object.type != OBJ_COMMIT) { |
ed09aef0 JS |
111 | commit = NULL; |
112 | continue; | |
113 | } | |
58dbe58f NTND |
114 | depth_slot = commit_depth_at(&depths, commit); |
115 | if (!*depth_slot) | |
116 | *depth_slot = xmalloc(sizeof(int)); | |
117 | **depth_slot = 0; | |
ed09aef0 JS |
118 | cur_depth = 0; |
119 | } else { | |
120 | commit = (struct commit *) | |
71992039 | 121 | object_array_pop(&stack); |
58dbe58f | 122 | cur_depth = **commit_depth_at(&depths, commit); |
ed09aef0 JS |
123 | } |
124 | } | |
367068e0 | 125 | parse_commit_or_die(commit); |
ed09aef0 | 126 | cur_depth++; |
79d3a236 | 127 | if ((depth != INFINITE_DEPTH && cur_depth >= depth) || |
c8813487 | 128 | (is_repository_shallow(the_repository) && !commit->parents && |
1f93ecd1 | 129 | (graft = lookup_commit_graft(the_repository, &commit->object.oid)) != NULL && |
79d3a236 | 130 | graft->nr_parent < 0)) { |
682c7d2f NTND |
131 | commit_list_insert(commit, &result); |
132 | commit->object.flags |= shallow_flag; | |
133 | commit = NULL; | |
134 | continue; | |
135 | } | |
136 | commit->object.flags |= not_shallow_flag; | |
ed09aef0 | 137 | for (p = commit->parents, commit = NULL; p; p = p->next) { |
58dbe58f NTND |
138 | int **depth_slot = commit_depth_at(&depths, p->item); |
139 | if (!*depth_slot) { | |
140 | *depth_slot = xmalloc(sizeof(int)); | |
141 | **depth_slot = cur_depth; | |
ed09aef0 | 142 | } else { |
58dbe58f | 143 | if (cur_depth >= **depth_slot) |
ed09aef0 | 144 | continue; |
58dbe58f | 145 | **depth_slot = cur_depth; |
ed09aef0 | 146 | } |
4b796951 MK |
147 | if (p->next) |
148 | add_object_array(&p->item->object, | |
149 | NULL, &stack); | |
150 | else { | |
151 | commit = p->item; | |
58dbe58f | 152 | cur_depth = **commit_depth_at(&depths, commit); |
f53514bc | 153 | } |
ed09aef0 JS |
154 | } |
155 | } | |
58dbe58f NTND |
156 | for (i = 0; i < depths.slab_count; i++) { |
157 | int j; | |
158 | ||
159 | for (j = 0; j < depths.slab_size; j++) | |
160 | free(depths.slab[i][j]); | |
161 | } | |
162 | clear_commit_depth(&depths); | |
ed09aef0 JS |
163 | |
164 | return result; | |
165 | } | |
6035d6aa | 166 | |
3d9ff4d7 NTND |
167 | static void show_commit(struct commit *commit, void *data) |
168 | { | |
169 | commit_list_insert(commit, data); | |
170 | } | |
171 | ||
172 | /* | |
173 | * Given rev-list arguments, run rev-list. All reachable commits | |
174 | * except border ones are marked with not_shallow_flag. Border commits | |
175 | * are marked with shallow_flag. The list of border/shallow commits | |
176 | * are also returned. | |
177 | */ | |
178 | struct commit_list *get_shallow_commits_by_rev_list(int ac, const char **av, | |
179 | int shallow_flag, | |
180 | int not_shallow_flag) | |
181 | { | |
182 | struct commit_list *result = NULL, *p; | |
183 | struct commit_list *not_shallow_list = NULL; | |
184 | struct rev_info revs; | |
185 | int both_flags = shallow_flag | not_shallow_flag; | |
186 | ||
187 | /* | |
188 | * SHALLOW (excluded) and NOT_SHALLOW (included) should not be | |
189 | * set at this point. But better be safe than sorry. | |
190 | */ | |
191 | clear_object_flags(both_flags); | |
192 | ||
c8813487 | 193 | is_repository_shallow(the_repository); /* make sure shallows are read */ |
3d9ff4d7 | 194 | |
2abf3503 | 195 | repo_init_revisions(the_repository, &revs, NULL); |
3d9ff4d7 NTND |
196 | save_commit_buffer = 0; |
197 | setup_revisions(ac, av, &revs, NULL); | |
198 | ||
199 | if (prepare_revision_walk(&revs)) | |
200 | die("revision walk setup failed"); | |
201 | traverse_commit_list(&revs, show_commit, NULL, ¬_shallow_list); | |
202 | ||
e34de73c NTND |
203 | if (!not_shallow_list) |
204 | die("no commits selected for shallow requests"); | |
205 | ||
3d9ff4d7 NTND |
206 | /* Mark all reachable commits as NOT_SHALLOW */ |
207 | for (p = not_shallow_list; p; p = p->next) | |
208 | p->item->object.flags |= not_shallow_flag; | |
209 | ||
210 | /* | |
211 | * mark border commits SHALLOW + NOT_SHALLOW. | |
212 | * We cannot clear NOT_SHALLOW right now. Imagine border | |
213 | * commit A is processed first, then commit B, whose parent is | |
214 | * A, later. If NOT_SHALLOW on A is cleared at step 1, B | |
215 | * itself is considered border at step 2, which is incorrect. | |
216 | */ | |
217 | for (p = not_shallow_list; p; p = p->next) { | |
218 | struct commit *c = p->item; | |
219 | struct commit_list *parent; | |
220 | ||
221 | if (parse_commit(c)) | |
222 | die("unable to parse commit %s", | |
223 | oid_to_hex(&c->object.oid)); | |
224 | ||
225 | for (parent = c->parents; parent; parent = parent->next) | |
226 | if (!(parent->item->object.flags & not_shallow_flag)) { | |
227 | c->object.flags |= shallow_flag; | |
228 | commit_list_insert(c, &result); | |
229 | break; | |
230 | } | |
231 | } | |
232 | free_commit_list(not_shallow_list); | |
233 | ||
234 | /* | |
235 | * Now we can clean up NOT_SHALLOW on border commits. Having | |
236 | * both flags set can confuse the caller. | |
237 | */ | |
238 | for (p = result; p; p = p->next) { | |
239 | struct object *o = &p->item->object; | |
240 | if ((o->flags & both_flags) == both_flags) | |
241 | o->flags &= ~not_shallow_flag; | |
242 | } | |
243 | return result; | |
244 | } | |
245 | ||
eee4502b | 246 | static void check_shallow_file_for_update(struct repository *r) |
6035d6aa | 247 | { |
eee4502b | 248 | if (r->parsed_objects->is_shallow == -1) |
033abf97 | 249 | BUG("shallow must be initialized by now"); |
6035d6aa | 250 | |
34e7771b NTND |
251 | if (!stat_validity_check(r->parsed_objects->shallow_stat, |
252 | git_path_shallow(r))) | |
0cc77c38 | 253 | die("shallow file has changed since we read it"); |
6035d6aa | 254 | } |
3125fe52 | 255 | |
eab3296c NTND |
256 | #define SEEN_ONLY 1 |
257 | #define VERBOSE 2 | |
2588f6ed | 258 | #define QUICK 4 |
eab3296c | 259 | |
3125fe52 NTND |
260 | struct write_shallow_data { |
261 | struct strbuf *out; | |
262 | int use_pack_protocol; | |
263 | int count; | |
eab3296c | 264 | unsigned flags; |
3125fe52 NTND |
265 | }; |
266 | ||
267 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
268 | { | |
269 | struct write_shallow_data *data = cb_data; | |
7683e2e6 | 270 | const char *hex = oid_to_hex(&graft->oid); |
6a3bbb4d NTND |
271 | if (graft->nr_parent != -1) |
272 | return 0; | |
2588f6ed JS |
273 | if (data->flags & QUICK) { |
274 | if (!has_object_file(&graft->oid)) | |
275 | return 0; | |
276 | } else if (data->flags & SEEN_ONLY) { | |
c1f5eb49 | 277 | struct commit *c = lookup_commit(the_repository, &graft->oid); |
eab3296c NTND |
278 | if (!c || !(c->object.flags & SEEN)) { |
279 | if (data->flags & VERBOSE) | |
280 | printf("Removing %s from .git/shallow\n", | |
f2fd0760 | 281 | oid_to_hex(&c->object.oid)); |
eab3296c NTND |
282 | return 0; |
283 | } | |
284 | } | |
3125fe52 NTND |
285 | data->count++; |
286 | if (data->use_pack_protocol) | |
287 | packet_buf_write(data->out, "shallow %s", hex); | |
288 | else { | |
289 | strbuf_addstr(data->out, hex); | |
290 | strbuf_addch(data->out, '\n'); | |
291 | } | |
292 | return 0; | |
293 | } | |
294 | ||
eab3296c | 295 | static int write_shallow_commits_1(struct strbuf *out, int use_pack_protocol, |
910650d2 | 296 | const struct oid_array *extra, |
eab3296c | 297 | unsigned flags) |
3125fe52 NTND |
298 | { |
299 | struct write_shallow_data data; | |
1a30f5a2 | 300 | int i; |
3125fe52 NTND |
301 | data.out = out; |
302 | data.use_pack_protocol = use_pack_protocol; | |
303 | data.count = 0; | |
eab3296c | 304 | data.flags = flags; |
3125fe52 | 305 | for_each_commit_graft(write_one_shallow, &data); |
1a30f5a2 NTND |
306 | if (!extra) |
307 | return data.count; | |
308 | for (i = 0; i < extra->nr; i++) { | |
ee3051bd | 309 | strbuf_addstr(out, oid_to_hex(extra->oid + i)); |
1a30f5a2 NTND |
310 | strbuf_addch(out, '\n'); |
311 | data.count++; | |
312 | } | |
3125fe52 NTND |
313 | return data.count; |
314 | } | |
315 | ||
eab3296c | 316 | int write_shallow_commits(struct strbuf *out, int use_pack_protocol, |
910650d2 | 317 | const struct oid_array *extra) |
eab3296c NTND |
318 | { |
319 | return write_shallow_commits_1(out, use_pack_protocol, extra, 0); | |
320 | } | |
321 | ||
910650d2 | 322 | const char *setup_temporary_shallow(const struct oid_array *extra) |
08ea65ad | 323 | { |
076aa2cb | 324 | struct tempfile *temp; |
08ea65ad | 325 | struct strbuf sb = STRBUF_INIT; |
08ea65ad | 326 | |
1a30f5a2 | 327 | if (write_shallow_commits(&sb, 0, extra)) { |
076aa2cb | 328 | temp = xmks_tempfile(git_path("shallow_XXXXXX")); |
0179c945 | 329 | |
c50424a6 | 330 | if (write_in_full(temp->fd, sb.buf, sb.len) < 0 || |
076aa2cb | 331 | close_tempfile_gently(temp) < 0) |
08ea65ad | 332 | die_errno("failed to write to %s", |
076aa2cb | 333 | get_tempfile_path(temp)); |
08ea65ad | 334 | strbuf_release(&sb); |
076aa2cb | 335 | return get_tempfile_path(temp); |
08ea65ad NTND |
336 | } |
337 | /* | |
338 | * is_repository_shallow() sees empty string as "no shallow | |
339 | * file". | |
340 | */ | |
08990139 | 341 | return ""; |
08ea65ad NTND |
342 | } |
343 | ||
3125fe52 | 344 | void setup_alternate_shallow(struct lock_file *shallow_lock, |
1a30f5a2 | 345 | const char **alternate_shallow_file, |
910650d2 | 346 | const struct oid_array *extra) |
3125fe52 NTND |
347 | { |
348 | struct strbuf sb = STRBUF_INIT; | |
349 | int fd; | |
350 | ||
102de880 SB |
351 | fd = hold_lock_file_for_update(shallow_lock, |
352 | git_path_shallow(the_repository), | |
3125fe52 | 353 | LOCK_DIE_ON_ERROR); |
22bdc7c4 | 354 | check_shallow_file_for_update(the_repository); |
1a30f5a2 | 355 | if (write_shallow_commits(&sb, 0, extra)) { |
06f46f23 | 356 | if (write_in_full(fd, sb.buf, sb.len) < 0) |
3125fe52 | 357 | die_errno("failed to write to %s", |
b4fb09e4 MH |
358 | get_lock_file_path(shallow_lock)); |
359 | *alternate_shallow_file = get_lock_file_path(shallow_lock); | |
3125fe52 NTND |
360 | } else |
361 | /* | |
362 | * is_repository_shallow() sees empty string as "no | |
363 | * shallow file". | |
364 | */ | |
365 | *alternate_shallow_file = ""; | |
366 | strbuf_release(&sb); | |
367 | } | |
ad491366 NTND |
368 | |
369 | static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb) | |
370 | { | |
371 | int fd = *(int *)cb; | |
372 | if (graft->nr_parent == -1) | |
81c634e9 | 373 | packet_write_fmt(fd, "shallow %s\n", oid_to_hex(&graft->oid)); |
ad491366 NTND |
374 | return 0; |
375 | } | |
376 | ||
377 | void advertise_shallow_grafts(int fd) | |
378 | { | |
c8813487 | 379 | if (!is_repository_shallow(the_repository)) |
ad491366 NTND |
380 | return; |
381 | for_each_commit_graft(advertise_shallow_grafts_cb, &fd); | |
382 | } | |
58babfff | 383 | |
eab3296c NTND |
384 | /* |
385 | * mark_reachable_objects() should have been run prior to this and all | |
2588f6ed JS |
386 | * reachable commits marked as "SEEN", except when quick_prune is non-zero, |
387 | * in which case lines are excised from the shallow file if they refer to | |
388 | * commits that do not exist (any longer). | |
eab3296c | 389 | */ |
2588f6ed | 390 | void prune_shallow(unsigned options) |
eab3296c | 391 | { |
b2275868 | 392 | struct lock_file shallow_lock = LOCK_INIT; |
eab3296c | 393 | struct strbuf sb = STRBUF_INIT; |
2588f6ed | 394 | unsigned flags = SEEN_ONLY; |
eab3296c NTND |
395 | int fd; |
396 | ||
2588f6ed JS |
397 | if (options & PRUNE_QUICK) |
398 | flags |= QUICK; | |
399 | ||
400 | if (options & PRUNE_SHOW_ONLY) { | |
401 | flags |= VERBOSE; | |
402 | write_shallow_commits_1(&sb, 0, NULL, flags); | |
eab3296c NTND |
403 | strbuf_release(&sb); |
404 | return; | |
405 | } | |
102de880 SB |
406 | fd = hold_lock_file_for_update(&shallow_lock, |
407 | git_path_shallow(the_repository), | |
eab3296c | 408 | LOCK_DIE_ON_ERROR); |
22bdc7c4 | 409 | check_shallow_file_for_update(the_repository); |
2588f6ed | 410 | if (write_shallow_commits_1(&sb, 0, NULL, flags)) { |
06f46f23 | 411 | if (write_in_full(fd, sb.buf, sb.len) < 0) |
eab3296c | 412 | die_errno("failed to write to %s", |
b4fb09e4 | 413 | get_lock_file_path(&shallow_lock)); |
eab3296c NTND |
414 | commit_lock_file(&shallow_lock); |
415 | } else { | |
102de880 | 416 | unlink(git_path_shallow(the_repository)); |
eab3296c NTND |
417 | rollback_lock_file(&shallow_lock); |
418 | } | |
419 | strbuf_release(&sb); | |
420 | } | |
421 | ||
6aa30857 | 422 | struct trace_key trace_shallow = TRACE_KEY_INIT(SHALLOW); |
58babfff NTND |
423 | |
424 | /* | |
425 | * Step 1, split sender shallow commits into "ours" and "theirs" | |
426 | * Step 2, clean "ours" based on .git/shallow | |
427 | */ | |
910650d2 | 428 | void prepare_shallow_info(struct shallow_info *info, struct oid_array *sa) |
58babfff NTND |
429 | { |
430 | int i; | |
6aa30857 | 431 | trace_printf_key(&trace_shallow, "shallow: prepare_shallow_info\n"); |
58babfff NTND |
432 | memset(info, 0, sizeof(*info)); |
433 | info->shallow = sa; | |
434 | if (!sa) | |
435 | return; | |
b32fa95f JK |
436 | ALLOC_ARRAY(info->ours, sa->nr); |
437 | ALLOC_ARRAY(info->theirs, sa->nr); | |
58babfff | 438 | for (i = 0; i < sa->nr; i++) { |
ee3051bd | 439 | if (has_object_file(sa->oid + i)) { |
58babfff | 440 | struct commit_graft *graft; |
1f93ecd1 JN |
441 | graft = lookup_commit_graft(the_repository, |
442 | &sa->oid[i]); | |
58babfff NTND |
443 | if (graft && graft->nr_parent < 0) |
444 | continue; | |
445 | info->ours[info->nr_ours++] = i; | |
446 | } else | |
447 | info->theirs[info->nr_theirs++] = i; | |
448 | } | |
449 | } | |
450 | ||
451 | void clear_shallow_info(struct shallow_info *info) | |
452 | { | |
453 | free(info->ours); | |
454 | free(info->theirs); | |
455 | } | |
456 | ||
457 | /* Step 4, remove non-existent ones in "theirs" after getting the pack */ | |
458 | ||
459 | void remove_nonexistent_theirs_shallow(struct shallow_info *info) | |
460 | { | |
ee3051bd | 461 | struct object_id *oid = info->shallow->oid; |
58babfff | 462 | int i, dst; |
6aa30857 | 463 | trace_printf_key(&trace_shallow, "shallow: remove_nonexistent_theirs_shallow\n"); |
58babfff NTND |
464 | for (i = dst = 0; i < info->nr_theirs; i++) { |
465 | if (i != dst) | |
466 | info->theirs[dst] = info->theirs[i]; | |
ee3051bd | 467 | if (has_object_file(oid + info->theirs[i])) |
58babfff NTND |
468 | dst++; |
469 | } | |
470 | info->nr_theirs = dst; | |
471 | } | |
472 | ||
8e277383 NTND |
473 | define_commit_slab(ref_bitmap, uint32_t *); |
474 | ||
6bc3d8c5 NTND |
475 | #define POOL_SIZE (512 * 1024) |
476 | ||
8e277383 NTND |
477 | struct paint_info { |
478 | struct ref_bitmap ref_bitmap; | |
479 | unsigned nr_bits; | |
0afd307a | 480 | char **pools; |
8e277383 | 481 | char *free, *end; |
0afd307a | 482 | unsigned pool_count; |
8e277383 NTND |
483 | }; |
484 | ||
485 | static uint32_t *paint_alloc(struct paint_info *info) | |
486 | { | |
42c78a21 | 487 | unsigned nr = DIV_ROUND_UP(info->nr_bits, 32); |
8e277383 NTND |
488 | unsigned size = nr * sizeof(uint32_t); |
489 | void *p; | |
381aa8e7 | 490 | if (!info->pool_count || size > info->end - info->free) { |
f2386c6b | 491 | if (size > POOL_SIZE) |
033abf97 | 492 | BUG("pool size too small for %d in paint_alloc()", |
f2386c6b | 493 | size); |
0afd307a NTND |
494 | info->pool_count++; |
495 | REALLOC_ARRAY(info->pools, info->pool_count); | |
6bc3d8c5 | 496 | info->free = xmalloc(POOL_SIZE); |
0afd307a | 497 | info->pools[info->pool_count - 1] = info->free; |
6bc3d8c5 | 498 | info->end = info->free + POOL_SIZE; |
8e277383 NTND |
499 | } |
500 | p = info->free; | |
501 | info->free += size; | |
502 | return p; | |
503 | } | |
504 | ||
505 | /* | |
506 | * Given a commit SHA-1, walk down to parents until either SEEN, | |
507 | * UNINTERESTING or BOTTOM is hit. Set the id-th bit in ref_bitmap for | |
508 | * all walked commits. | |
509 | */ | |
1e43ed98 | 510 | static void paint_down(struct paint_info *info, const struct object_id *oid, |
1127b3ce | 511 | unsigned int id) |
8e277383 NTND |
512 | { |
513 | unsigned int i, nr; | |
514 | struct commit_list *head = NULL; | |
42c78a21 | 515 | int bitmap_nr = DIV_ROUND_UP(info->nr_bits, 32); |
50492f7b | 516 | size_t bitmap_size = st_mult(sizeof(uint32_t), bitmap_nr); |
21e1ee8f SB |
517 | struct commit *c = lookup_commit_reference_gently(the_repository, oid, |
518 | 1); | |
7c565a6b JS |
519 | uint32_t *tmp; /* to be freed before return */ |
520 | uint32_t *bitmap; | |
521 | ||
8e277383 NTND |
522 | if (!c) |
523 | return; | |
7c565a6b JS |
524 | |
525 | tmp = xmalloc(bitmap_size); | |
526 | bitmap = paint_alloc(info); | |
8e277383 | 527 | memset(bitmap, 0, bitmap_size); |
1127b3ce | 528 | bitmap[id / 32] |= (1U << (id % 32)); |
8e277383 NTND |
529 | commit_list_insert(c, &head); |
530 | while (head) { | |
531 | struct commit_list *p; | |
e510ab89 | 532 | struct commit *c = pop_commit(&head); |
8e277383 NTND |
533 | uint32_t **refs = ref_bitmap_at(&info->ref_bitmap, c); |
534 | ||
8e277383 NTND |
535 | /* XXX check "UNINTERESTING" from pack bitmaps if available */ |
536 | if (c->object.flags & (SEEN | UNINTERESTING)) | |
537 | continue; | |
538 | else | |
539 | c->object.flags |= SEEN; | |
540 | ||
541 | if (*refs == NULL) | |
542 | *refs = bitmap; | |
543 | else { | |
544 | memcpy(tmp, *refs, bitmap_size); | |
545 | for (i = 0; i < bitmap_nr; i++) | |
546 | tmp[i] |= bitmap[i]; | |
547 | if (memcmp(tmp, *refs, bitmap_size)) { | |
548 | *refs = paint_alloc(info); | |
549 | memcpy(*refs, tmp, bitmap_size); | |
550 | } | |
551 | } | |
552 | ||
553 | if (c->object.flags & BOTTOM) | |
554 | continue; | |
555 | ||
556 | if (parse_commit(c)) | |
557 | die("unable to parse commit %s", | |
f2fd0760 | 558 | oid_to_hex(&c->object.oid)); |
8e277383 NTND |
559 | |
560 | for (p = c->parents; p; p = p->next) { | |
8e277383 NTND |
561 | if (p->item->object.flags & SEEN) |
562 | continue; | |
8e277383 NTND |
563 | commit_list_insert(p->item, &head); |
564 | } | |
565 | } | |
566 | ||
567 | nr = get_max_object_index(); | |
568 | for (i = 0; i < nr; i++) { | |
569 | struct object *o = get_indexed_object(i); | |
570 | if (o && o->type == OBJ_COMMIT) | |
571 | o->flags &= ~SEEN; | |
572 | } | |
573 | ||
574 | free(tmp); | |
575 | } | |
576 | ||
580b04ef | 577 | static int mark_uninteresting(const char *refname, const struct object_id *oid, |
8e277383 NTND |
578 | int flags, void *cb_data) |
579 | { | |
21e1ee8f SB |
580 | struct commit *commit = lookup_commit_reference_gently(the_repository, |
581 | oid, 1); | |
8e277383 NTND |
582 | if (!commit) |
583 | return 0; | |
584 | commit->object.flags |= UNINTERESTING; | |
585 | mark_parents_uninteresting(commit); | |
586 | return 0; | |
587 | } | |
588 | ||
589 | static void post_assign_shallow(struct shallow_info *info, | |
590 | struct ref_bitmap *ref_bitmap, | |
591 | int *ref_status); | |
592 | /* | |
593 | * Step 6(+7), associate shallow commits with new refs | |
594 | * | |
595 | * info->ref must be initialized before calling this function. | |
596 | * | |
597 | * If used is not NULL, it's an array of info->shallow->nr | |
598 | * bitmaps. The n-th bit set in the m-th bitmap if ref[n] needs the | |
599 | * m-th shallow commit from info->shallow. | |
600 | * | |
601 | * If used is NULL, "ours" and "theirs" are updated. And if ref_status | |
602 | * is not NULL it's an array of ref->nr ints. ref_status[i] is true if | |
603 | * the ref needs some shallow commits from either info->ours or | |
604 | * info->theirs. | |
605 | */ | |
606 | void assign_shallow_commits_to_refs(struct shallow_info *info, | |
607 | uint32_t **used, int *ref_status) | |
608 | { | |
ee3051bd | 609 | struct object_id *oid = info->shallow->oid; |
910650d2 | 610 | struct oid_array *ref = info->ref; |
8e277383 NTND |
611 | unsigned int i, nr; |
612 | int *shallow, nr_shallow = 0; | |
613 | struct paint_info pi; | |
614 | ||
6aa30857 | 615 | trace_printf_key(&trace_shallow, "shallow: assign_shallow_commits_to_refs\n"); |
b32fa95f | 616 | ALLOC_ARRAY(shallow, info->nr_ours + info->nr_theirs); |
8e277383 NTND |
617 | for (i = 0; i < info->nr_ours; i++) |
618 | shallow[nr_shallow++] = info->ours[i]; | |
619 | for (i = 0; i < info->nr_theirs; i++) | |
620 | shallow[nr_shallow++] = info->theirs[i]; | |
621 | ||
622 | /* | |
623 | * Prepare the commit graph to track what refs can reach what | |
624 | * (new) shallow commits. | |
625 | */ | |
626 | nr = get_max_object_index(); | |
627 | for (i = 0; i < nr; i++) { | |
628 | struct object *o = get_indexed_object(i); | |
629 | if (!o || o->type != OBJ_COMMIT) | |
630 | continue; | |
631 | ||
632 | o->flags &= ~(UNINTERESTING | BOTTOM | SEEN); | |
633 | } | |
634 | ||
635 | memset(&pi, 0, sizeof(pi)); | |
636 | init_ref_bitmap(&pi.ref_bitmap); | |
637 | pi.nr_bits = ref->nr; | |
638 | ||
639 | /* | |
640 | * "--not --all" to cut short the traversal if new refs | |
641 | * connect to old refs. If not (e.g. force ref updates) it'll | |
642 | * have to go down to the current shallow commits. | |
643 | */ | |
580b04ef MH |
644 | head_ref(mark_uninteresting, NULL); |
645 | for_each_ref(mark_uninteresting, NULL); | |
8e277383 NTND |
646 | |
647 | /* Mark potential bottoms so we won't go out of bound */ | |
648 | for (i = 0; i < nr_shallow; i++) { | |
c1f5eb49 SB |
649 | struct commit *c = lookup_commit(the_repository, |
650 | &oid[shallow[i]]); | |
8e277383 NTND |
651 | c->object.flags |= BOTTOM; |
652 | } | |
653 | ||
654 | for (i = 0; i < ref->nr; i++) | |
1e43ed98 | 655 | paint_down(&pi, ref->oid + i, i); |
8e277383 NTND |
656 | |
657 | if (used) { | |
42c78a21 | 658 | int bitmap_size = DIV_ROUND_UP(pi.nr_bits, 32) * sizeof(uint32_t); |
8e277383 NTND |
659 | memset(used, 0, sizeof(*used) * info->shallow->nr); |
660 | for (i = 0; i < nr_shallow; i++) { | |
c1f5eb49 SB |
661 | const struct commit *c = lookup_commit(the_repository, |
662 | &oid[shallow[i]]); | |
8e277383 NTND |
663 | uint32_t **map = ref_bitmap_at(&pi.ref_bitmap, c); |
664 | if (*map) | |
665 | used[shallow[i]] = xmemdupz(*map, bitmap_size); | |
666 | } | |
667 | /* | |
668 | * unreachable shallow commits are not removed from | |
669 | * "ours" and "theirs". The user is supposed to run | |
670 | * step 7 on every ref separately and not trust "ours" | |
671 | * and "theirs" any more. | |
672 | */ | |
673 | } else | |
674 | post_assign_shallow(info, &pi.ref_bitmap, ref_status); | |
675 | ||
676 | clear_ref_bitmap(&pi.ref_bitmap); | |
0afd307a NTND |
677 | for (i = 0; i < pi.pool_count; i++) |
678 | free(pi.pools[i]); | |
679 | free(pi.pools); | |
8e277383 NTND |
680 | free(shallow); |
681 | } | |
682 | ||
683 | struct commit_array { | |
684 | struct commit **commits; | |
685 | int nr, alloc; | |
686 | }; | |
687 | ||
580b04ef MH |
688 | static int add_ref(const char *refname, const struct object_id *oid, |
689 | int flags, void *cb_data) | |
8e277383 NTND |
690 | { |
691 | struct commit_array *ca = cb_data; | |
692 | ALLOC_GROW(ca->commits, ca->nr + 1, ca->alloc); | |
21e1ee8f SB |
693 | ca->commits[ca->nr] = lookup_commit_reference_gently(the_repository, |
694 | oid, 1); | |
8e277383 NTND |
695 | if (ca->commits[ca->nr]) |
696 | ca->nr++; | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static void update_refstatus(int *ref_status, int nr, uint32_t *bitmap) | |
701 | { | |
1127b3ce | 702 | unsigned int i; |
8e277383 NTND |
703 | if (!ref_status) |
704 | return; | |
705 | for (i = 0; i < nr; i++) | |
1127b3ce | 706 | if (bitmap[i / 32] & (1U << (i % 32))) |
8e277383 NTND |
707 | ref_status[i]++; |
708 | } | |
709 | ||
710 | /* | |
711 | * Step 7, reachability test on "ours" at commit level | |
712 | */ | |
713 | static void post_assign_shallow(struct shallow_info *info, | |
714 | struct ref_bitmap *ref_bitmap, | |
715 | int *ref_status) | |
716 | { | |
ee3051bd | 717 | struct object_id *oid = info->shallow->oid; |
8e277383 NTND |
718 | struct commit *c; |
719 | uint32_t **bitmap; | |
720 | int dst, i, j; | |
42c78a21 | 721 | int bitmap_nr = DIV_ROUND_UP(info->ref->nr, 32); |
8e277383 NTND |
722 | struct commit_array ca; |
723 | ||
6aa30857 | 724 | trace_printf_key(&trace_shallow, "shallow: post_assign_shallow\n"); |
8e277383 NTND |
725 | if (ref_status) |
726 | memset(ref_status, 0, sizeof(*ref_status) * info->ref->nr); | |
727 | ||
728 | /* Remove unreachable shallow commits from "theirs" */ | |
729 | for (i = dst = 0; i < info->nr_theirs; i++) { | |
730 | if (i != dst) | |
731 | info->theirs[dst] = info->theirs[i]; | |
c1f5eb49 | 732 | c = lookup_commit(the_repository, &oid[info->theirs[i]]); |
8e277383 NTND |
733 | bitmap = ref_bitmap_at(ref_bitmap, c); |
734 | if (!*bitmap) | |
735 | continue; | |
736 | for (j = 0; j < bitmap_nr; j++) | |
737 | if (bitmap[0][j]) { | |
738 | update_refstatus(ref_status, info->ref->nr, *bitmap); | |
739 | dst++; | |
740 | break; | |
741 | } | |
742 | } | |
743 | info->nr_theirs = dst; | |
744 | ||
745 | memset(&ca, 0, sizeof(ca)); | |
580b04ef MH |
746 | head_ref(add_ref, &ca); |
747 | for_each_ref(add_ref, &ca); | |
8e277383 NTND |
748 | |
749 | /* Remove unreachable shallow commits from "ours" */ | |
750 | for (i = dst = 0; i < info->nr_ours; i++) { | |
751 | if (i != dst) | |
752 | info->ours[dst] = info->ours[i]; | |
c1f5eb49 | 753 | c = lookup_commit(the_repository, &oid[info->ours[i]]); |
8e277383 NTND |
754 | bitmap = ref_bitmap_at(ref_bitmap, c); |
755 | if (!*bitmap) | |
756 | continue; | |
757 | for (j = 0; j < bitmap_nr; j++) | |
758 | if (bitmap[0][j] && | |
759 | /* Step 7, reachability test at commit level */ | |
760 | !in_merge_bases_many(c, ca.nr, ca.commits)) { | |
761 | update_refstatus(ref_status, info->ref->nr, *bitmap); | |
762 | dst++; | |
763 | break; | |
764 | } | |
765 | } | |
766 | info->nr_ours = dst; | |
767 | ||
768 | free(ca.commits); | |
769 | } | |
0a1bc12b NTND |
770 | |
771 | /* (Delayed) step 7, reachability test at commit level */ | |
772 | int delayed_reachability_test(struct shallow_info *si, int c) | |
773 | { | |
774 | if (si->need_reachability_test[c]) { | |
c1f5eb49 SB |
775 | struct commit *commit = lookup_commit(the_repository, |
776 | &si->shallow->oid[c]); | |
0a1bc12b NTND |
777 | |
778 | if (!si->commits) { | |
779 | struct commit_array ca; | |
2b2a5be3 | 780 | |
0a1bc12b | 781 | memset(&ca, 0, sizeof(ca)); |
580b04ef MH |
782 | head_ref(add_ref, &ca); |
783 | for_each_ref(add_ref, &ca); | |
0a1bc12b NTND |
784 | si->commits = ca.commits; |
785 | si->nr_commits = ca.nr; | |
786 | } | |
787 | ||
788 | si->reachable[c] = in_merge_bases_many(commit, | |
789 | si->nr_commits, | |
790 | si->commits); | |
791 | si->need_reachability_test[c] = 0; | |
792 | } | |
793 | return si->reachable[c]; | |
794 | } |