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Commit | Line | Data |
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ed09aef0 JS |
1 | #include "cache.h" |
2 | #include "commit.h" | |
abef3a16 | 3 | #include "tag.h" |
3125fe52 | 4 | #include "pkt-line.h" |
58babfff NTND |
5 | #include "remote.h" |
6 | #include "refs.h" | |
7 | #include "sha1-array.h" | |
8 | #include "diff.h" | |
9 | #include "revision.h" | |
10 | #include "commit-slab.h" | |
ed09aef0 JS |
11 | |
12 | static int is_shallow = -1; | |
6035d6aa NTND |
13 | static struct stat shallow_stat; |
14 | static char *alternate_shallow_file; | |
15 | ||
16 | void set_alternate_shallow_file(const char *path) | |
17 | { | |
18 | if (is_shallow != -1) | |
19 | die("BUG: is_repository_shallow must not be called before set_alternate_shallow_file"); | |
20 | free(alternate_shallow_file); | |
21 | alternate_shallow_file = path ? xstrdup(path) : NULL; | |
22 | } | |
ed09aef0 JS |
23 | |
24 | int register_shallow(const unsigned char *sha1) | |
25 | { | |
26 | struct commit_graft *graft = | |
27 | xmalloc(sizeof(struct commit_graft)); | |
28 | struct commit *commit = lookup_commit(sha1); | |
29 | ||
30 | hashcpy(graft->sha1, sha1); | |
31 | graft->nr_parent = -1; | |
32 | if (commit && commit->object.parsed) | |
33 | commit->parents = NULL; | |
34 | return register_commit_graft(graft, 0); | |
35 | } | |
36 | ||
f43117a6 | 37 | int is_repository_shallow(void) |
ed09aef0 JS |
38 | { |
39 | FILE *fp; | |
40 | char buf[1024]; | |
6035d6aa | 41 | const char *path = alternate_shallow_file; |
ed09aef0 JS |
42 | |
43 | if (is_shallow >= 0) | |
44 | return is_shallow; | |
45 | ||
6035d6aa NTND |
46 | if (!path) |
47 | path = git_path("shallow"); | |
48 | /* | |
49 | * fetch-pack sets '--shallow-file ""' as an indicator that no | |
50 | * shallow file should be used. We could just open it and it | |
51 | * will likely fail. But let's do an explicit check instead. | |
52 | */ | |
53 | if (!*path || | |
54 | stat(path, &shallow_stat) || | |
55 | (fp = fopen(path, "r")) == NULL) { | |
ed09aef0 JS |
56 | is_shallow = 0; |
57 | return is_shallow; | |
58 | } | |
59 | is_shallow = 1; | |
60 | ||
61 | while (fgets(buf, sizeof(buf), fp)) { | |
62 | unsigned char sha1[20]; | |
63 | if (get_sha1_hex(buf, sha1)) | |
64 | die("bad shallow line: %s", buf); | |
65 | register_shallow(sha1); | |
66 | } | |
67 | fclose(fp); | |
68 | return is_shallow; | |
69 | } | |
70 | ||
f53514bc JS |
71 | struct commit_list *get_shallow_commits(struct object_array *heads, int depth, |
72 | int shallow_flag, int not_shallow_flag) | |
ed09aef0 JS |
73 | { |
74 | int i = 0, cur_depth = 0; | |
75 | struct commit_list *result = NULL; | |
3cd47459 | 76 | struct object_array stack = OBJECT_ARRAY_INIT; |
ed09aef0 | 77 | struct commit *commit = NULL; |
79d3a236 | 78 | struct commit_graft *graft; |
ed09aef0 JS |
79 | |
80 | while (commit || i < heads->nr || stack.nr) { | |
81 | struct commit_list *p; | |
82 | if (!commit) { | |
83 | if (i < heads->nr) { | |
84 | commit = (struct commit *) | |
abef3a16 | 85 | deref_tag(heads->objects[i++].item, NULL, 0); |
affeef12 | 86 | if (!commit || commit->object.type != OBJ_COMMIT) { |
ed09aef0 JS |
87 | commit = NULL; |
88 | continue; | |
89 | } | |
d64d6c9f AJ |
90 | if (!commit->util) |
91 | commit->util = xmalloc(sizeof(int)); | |
92 | *(int *)commit->util = 0; | |
ed09aef0 JS |
93 | cur_depth = 0; |
94 | } else { | |
95 | commit = (struct commit *) | |
96 | stack.objects[--stack.nr].item; | |
97 | cur_depth = *(int *)commit->util; | |
98 | } | |
99 | } | |
dec38c81 MK |
100 | if (parse_commit(commit)) |
101 | die("invalid commit"); | |
ed09aef0 | 102 | cur_depth++; |
79d3a236 NTND |
103 | if ((depth != INFINITE_DEPTH && cur_depth >= depth) || |
104 | (is_repository_shallow() && !commit->parents && | |
105 | (graft = lookup_commit_graft(commit->object.sha1)) != NULL && | |
106 | graft->nr_parent < 0)) { | |
682c7d2f NTND |
107 | commit_list_insert(commit, &result); |
108 | commit->object.flags |= shallow_flag; | |
109 | commit = NULL; | |
110 | continue; | |
111 | } | |
112 | commit->object.flags |= not_shallow_flag; | |
ed09aef0 JS |
113 | for (p = commit->parents, commit = NULL; p; p = p->next) { |
114 | if (!p->item->util) { | |
115 | int *pointer = xmalloc(sizeof(int)); | |
116 | p->item->util = pointer; | |
117 | *pointer = cur_depth; | |
118 | } else { | |
119 | int *pointer = p->item->util; | |
120 | if (cur_depth >= *pointer) | |
121 | continue; | |
122 | *pointer = cur_depth; | |
123 | } | |
4b796951 MK |
124 | if (p->next) |
125 | add_object_array(&p->item->object, | |
126 | NULL, &stack); | |
127 | else { | |
128 | commit = p->item; | |
129 | cur_depth = *(int *)commit->util; | |
f53514bc | 130 | } |
ed09aef0 JS |
131 | } |
132 | } | |
133 | ||
134 | return result; | |
135 | } | |
6035d6aa NTND |
136 | |
137 | void check_shallow_file_for_update(void) | |
138 | { | |
139 | struct stat st; | |
140 | ||
141 | if (!is_shallow) | |
142 | return; | |
143 | else if (is_shallow == -1) | |
144 | die("BUG: shallow must be initialized by now"); | |
145 | ||
146 | if (stat(git_path("shallow"), &st)) | |
147 | die("shallow file was removed during fetch"); | |
148 | else if (st.st_mtime != shallow_stat.st_mtime | |
149 | #ifdef USE_NSEC | |
150 | || ST_MTIME_NSEC(st) != ST_MTIME_NSEC(shallow_stat) | |
151 | #endif | |
152 | ) | |
153 | die("shallow file was changed during fetch"); | |
154 | } | |
3125fe52 NTND |
155 | |
156 | struct write_shallow_data { | |
157 | struct strbuf *out; | |
158 | int use_pack_protocol; | |
159 | int count; | |
160 | }; | |
161 | ||
162 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
163 | { | |
164 | struct write_shallow_data *data = cb_data; | |
165 | const char *hex = sha1_to_hex(graft->sha1); | |
6a3bbb4d NTND |
166 | if (graft->nr_parent != -1) |
167 | return 0; | |
3125fe52 NTND |
168 | data->count++; |
169 | if (data->use_pack_protocol) | |
170 | packet_buf_write(data->out, "shallow %s", hex); | |
171 | else { | |
172 | strbuf_addstr(data->out, hex); | |
173 | strbuf_addch(data->out, '\n'); | |
174 | } | |
175 | return 0; | |
176 | } | |
177 | ||
1a30f5a2 NTND |
178 | int write_shallow_commits(struct strbuf *out, int use_pack_protocol, |
179 | const struct sha1_array *extra) | |
3125fe52 NTND |
180 | { |
181 | struct write_shallow_data data; | |
1a30f5a2 | 182 | int i; |
3125fe52 NTND |
183 | data.out = out; |
184 | data.use_pack_protocol = use_pack_protocol; | |
185 | data.count = 0; | |
186 | for_each_commit_graft(write_one_shallow, &data); | |
1a30f5a2 NTND |
187 | if (!extra) |
188 | return data.count; | |
189 | for (i = 0; i < extra->nr; i++) { | |
190 | strbuf_addstr(out, sha1_to_hex(extra->sha1[i])); | |
191 | strbuf_addch(out, '\n'); | |
192 | data.count++; | |
193 | } | |
3125fe52 NTND |
194 | return data.count; |
195 | } | |
196 | ||
1a30f5a2 | 197 | char *setup_temporary_shallow(const struct sha1_array *extra) |
08ea65ad NTND |
198 | { |
199 | struct strbuf sb = STRBUF_INIT; | |
200 | int fd; | |
201 | ||
1a30f5a2 | 202 | if (write_shallow_commits(&sb, 0, extra)) { |
08ea65ad NTND |
203 | struct strbuf path = STRBUF_INIT; |
204 | strbuf_addstr(&path, git_path("shallow_XXXXXX")); | |
205 | fd = xmkstemp(path.buf); | |
206 | if (write_in_full(fd, sb.buf, sb.len) != sb.len) | |
207 | die_errno("failed to write to %s", | |
208 | path.buf); | |
209 | close(fd); | |
210 | strbuf_release(&sb); | |
211 | return strbuf_detach(&path, NULL); | |
212 | } | |
213 | /* | |
214 | * is_repository_shallow() sees empty string as "no shallow | |
215 | * file". | |
216 | */ | |
217 | return xstrdup(""); | |
218 | } | |
219 | ||
3125fe52 | 220 | void setup_alternate_shallow(struct lock_file *shallow_lock, |
1a30f5a2 NTND |
221 | const char **alternate_shallow_file, |
222 | const struct sha1_array *extra) | |
3125fe52 NTND |
223 | { |
224 | struct strbuf sb = STRBUF_INIT; | |
225 | int fd; | |
226 | ||
227 | check_shallow_file_for_update(); | |
228 | fd = hold_lock_file_for_update(shallow_lock, git_path("shallow"), | |
229 | LOCK_DIE_ON_ERROR); | |
1a30f5a2 | 230 | if (write_shallow_commits(&sb, 0, extra)) { |
3125fe52 NTND |
231 | if (write_in_full(fd, sb.buf, sb.len) != sb.len) |
232 | die_errno("failed to write to %s", | |
233 | shallow_lock->filename); | |
234 | *alternate_shallow_file = shallow_lock->filename; | |
235 | } else | |
236 | /* | |
237 | * is_repository_shallow() sees empty string as "no | |
238 | * shallow file". | |
239 | */ | |
240 | *alternate_shallow_file = ""; | |
241 | strbuf_release(&sb); | |
242 | } | |
ad491366 NTND |
243 | |
244 | static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb) | |
245 | { | |
246 | int fd = *(int *)cb; | |
247 | if (graft->nr_parent == -1) | |
248 | packet_write(fd, "shallow %s\n", sha1_to_hex(graft->sha1)); | |
249 | return 0; | |
250 | } | |
251 | ||
252 | void advertise_shallow_grafts(int fd) | |
253 | { | |
254 | if (!is_repository_shallow()) | |
255 | return; | |
256 | for_each_commit_graft(advertise_shallow_grafts_cb, &fd); | |
257 | } | |
58babfff NTND |
258 | |
259 | #define TRACE_KEY "GIT_TRACE_SHALLOW" | |
260 | ||
261 | /* | |
262 | * Step 1, split sender shallow commits into "ours" and "theirs" | |
263 | * Step 2, clean "ours" based on .git/shallow | |
264 | */ | |
265 | void prepare_shallow_info(struct shallow_info *info, struct sha1_array *sa) | |
266 | { | |
267 | int i; | |
268 | trace_printf_key(TRACE_KEY, "shallow: prepare_shallow_info\n"); | |
269 | memset(info, 0, sizeof(*info)); | |
270 | info->shallow = sa; | |
271 | if (!sa) | |
272 | return; | |
273 | info->ours = xmalloc(sizeof(*info->ours) * sa->nr); | |
274 | info->theirs = xmalloc(sizeof(*info->theirs) * sa->nr); | |
275 | for (i = 0; i < sa->nr; i++) { | |
276 | if (has_sha1_file(sa->sha1[i])) { | |
277 | struct commit_graft *graft; | |
278 | graft = lookup_commit_graft(sa->sha1[i]); | |
279 | if (graft && graft->nr_parent < 0) | |
280 | continue; | |
281 | info->ours[info->nr_ours++] = i; | |
282 | } else | |
283 | info->theirs[info->nr_theirs++] = i; | |
284 | } | |
285 | } | |
286 | ||
287 | void clear_shallow_info(struct shallow_info *info) | |
288 | { | |
289 | free(info->ours); | |
290 | free(info->theirs); | |
291 | } | |
292 | ||
293 | /* Step 4, remove non-existent ones in "theirs" after getting the pack */ | |
294 | ||
295 | void remove_nonexistent_theirs_shallow(struct shallow_info *info) | |
296 | { | |
297 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
298 | int i, dst; | |
299 | trace_printf_key(TRACE_KEY, "shallow: remove_nonexistent_theirs_shallow\n"); | |
300 | for (i = dst = 0; i < info->nr_theirs; i++) { | |
301 | if (i != dst) | |
302 | info->theirs[dst] = info->theirs[i]; | |
303 | if (has_sha1_file(sha1[info->theirs[i]])) | |
304 | dst++; | |
305 | } | |
306 | info->nr_theirs = dst; | |
307 | } | |
308 | ||
309 | /* Step 5, remove non-existent ones in "ours" in the pack */ | |
310 | void remove_nonexistent_ours_in_pack(struct shallow_info *info, | |
311 | struct packed_git *p) | |
312 | { | |
313 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
314 | int i, dst; | |
315 | trace_printf_key(TRACE_KEY, "shallow: remove_nonexistent_ours_in_pack\n"); | |
316 | for (i = dst = 0; i < info->nr_ours; i++) { | |
317 | if (i != dst) | |
318 | info->ours[dst] = info->ours[i]; | |
319 | if (find_pack_entry_one(sha1[info->ours[i]], p)) | |
320 | dst++; | |
321 | } | |
322 | info->nr_ours = dst; | |
323 | } | |
8e277383 NTND |
324 | |
325 | define_commit_slab(ref_bitmap, uint32_t *); | |
326 | ||
327 | struct paint_info { | |
328 | struct ref_bitmap ref_bitmap; | |
329 | unsigned nr_bits; | |
330 | char **slab; | |
331 | char *free, *end; | |
332 | unsigned slab_count; | |
333 | }; | |
334 | ||
335 | static uint32_t *paint_alloc(struct paint_info *info) | |
336 | { | |
337 | unsigned nr = (info->nr_bits + 31) / 32; | |
338 | unsigned size = nr * sizeof(uint32_t); | |
339 | void *p; | |
340 | if (!info->slab_count || info->free + size > info->end) { | |
341 | info->slab_count++; | |
342 | info->slab = xrealloc(info->slab, | |
343 | info->slab_count * sizeof(*info->slab)); | |
344 | info->free = xmalloc(COMMIT_SLAB_SIZE); | |
345 | info->slab[info->slab_count - 1] = info->free; | |
346 | info->end = info->free + COMMIT_SLAB_SIZE; | |
347 | } | |
348 | p = info->free; | |
349 | info->free += size; | |
350 | return p; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Given a commit SHA-1, walk down to parents until either SEEN, | |
355 | * UNINTERESTING or BOTTOM is hit. Set the id-th bit in ref_bitmap for | |
356 | * all walked commits. | |
357 | */ | |
358 | static void paint_down(struct paint_info *info, const unsigned char *sha1, | |
359 | int id) | |
360 | { | |
361 | unsigned int i, nr; | |
362 | struct commit_list *head = NULL; | |
363 | int bitmap_nr = (info->nr_bits + 31) / 32; | |
364 | int bitmap_size = bitmap_nr * sizeof(uint32_t); | |
365 | uint32_t *tmp = xmalloc(bitmap_size); /* to be freed before return */ | |
366 | uint32_t *bitmap = paint_alloc(info); | |
367 | struct commit *c = lookup_commit_reference_gently(sha1, 1); | |
368 | if (!c) | |
369 | return; | |
370 | memset(bitmap, 0, bitmap_size); | |
371 | bitmap[id / 32] |= (1 << (id % 32)); | |
372 | commit_list_insert(c, &head); | |
373 | while (head) { | |
374 | struct commit_list *p; | |
375 | struct commit *c = head->item; | |
376 | uint32_t **refs = ref_bitmap_at(&info->ref_bitmap, c); | |
377 | ||
378 | p = head; | |
379 | head = head->next; | |
380 | free(p); | |
381 | ||
382 | /* XXX check "UNINTERESTING" from pack bitmaps if available */ | |
383 | if (c->object.flags & (SEEN | UNINTERESTING)) | |
384 | continue; | |
385 | else | |
386 | c->object.flags |= SEEN; | |
387 | ||
388 | if (*refs == NULL) | |
389 | *refs = bitmap; | |
390 | else { | |
391 | memcpy(tmp, *refs, bitmap_size); | |
392 | for (i = 0; i < bitmap_nr; i++) | |
393 | tmp[i] |= bitmap[i]; | |
394 | if (memcmp(tmp, *refs, bitmap_size)) { | |
395 | *refs = paint_alloc(info); | |
396 | memcpy(*refs, tmp, bitmap_size); | |
397 | } | |
398 | } | |
399 | ||
400 | if (c->object.flags & BOTTOM) | |
401 | continue; | |
402 | ||
403 | if (parse_commit(c)) | |
404 | die("unable to parse commit %s", | |
405 | sha1_to_hex(c->object.sha1)); | |
406 | ||
407 | for (p = c->parents; p; p = p->next) { | |
408 | uint32_t **p_refs = ref_bitmap_at(&info->ref_bitmap, | |
409 | p->item); | |
410 | if (p->item->object.flags & SEEN) | |
411 | continue; | |
412 | if (*p_refs == NULL || *p_refs == *refs) | |
413 | *p_refs = *refs; | |
414 | commit_list_insert(p->item, &head); | |
415 | } | |
416 | } | |
417 | ||
418 | nr = get_max_object_index(); | |
419 | for (i = 0; i < nr; i++) { | |
420 | struct object *o = get_indexed_object(i); | |
421 | if (o && o->type == OBJ_COMMIT) | |
422 | o->flags &= ~SEEN; | |
423 | } | |
424 | ||
425 | free(tmp); | |
426 | } | |
427 | ||
428 | static int mark_uninteresting(const char *refname, | |
429 | const unsigned char *sha1, | |
430 | int flags, void *cb_data) | |
431 | { | |
432 | struct commit *commit = lookup_commit_reference_gently(sha1, 1); | |
433 | if (!commit) | |
434 | return 0; | |
435 | commit->object.flags |= UNINTERESTING; | |
436 | mark_parents_uninteresting(commit); | |
437 | return 0; | |
438 | } | |
439 | ||
440 | static void post_assign_shallow(struct shallow_info *info, | |
441 | struct ref_bitmap *ref_bitmap, | |
442 | int *ref_status); | |
443 | /* | |
444 | * Step 6(+7), associate shallow commits with new refs | |
445 | * | |
446 | * info->ref must be initialized before calling this function. | |
447 | * | |
448 | * If used is not NULL, it's an array of info->shallow->nr | |
449 | * bitmaps. The n-th bit set in the m-th bitmap if ref[n] needs the | |
450 | * m-th shallow commit from info->shallow. | |
451 | * | |
452 | * If used is NULL, "ours" and "theirs" are updated. And if ref_status | |
453 | * is not NULL it's an array of ref->nr ints. ref_status[i] is true if | |
454 | * the ref needs some shallow commits from either info->ours or | |
455 | * info->theirs. | |
456 | */ | |
457 | void assign_shallow_commits_to_refs(struct shallow_info *info, | |
458 | uint32_t **used, int *ref_status) | |
459 | { | |
460 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
461 | struct sha1_array *ref = info->ref; | |
462 | unsigned int i, nr; | |
463 | int *shallow, nr_shallow = 0; | |
464 | struct paint_info pi; | |
465 | ||
466 | trace_printf_key(TRACE_KEY, "shallow: assign_shallow_commits_to_refs\n"); | |
467 | shallow = xmalloc(sizeof(*shallow) * (info->nr_ours + info->nr_theirs)); | |
468 | for (i = 0; i < info->nr_ours; i++) | |
469 | shallow[nr_shallow++] = info->ours[i]; | |
470 | for (i = 0; i < info->nr_theirs; i++) | |
471 | shallow[nr_shallow++] = info->theirs[i]; | |
472 | ||
473 | /* | |
474 | * Prepare the commit graph to track what refs can reach what | |
475 | * (new) shallow commits. | |
476 | */ | |
477 | nr = get_max_object_index(); | |
478 | for (i = 0; i < nr; i++) { | |
479 | struct object *o = get_indexed_object(i); | |
480 | if (!o || o->type != OBJ_COMMIT) | |
481 | continue; | |
482 | ||
483 | o->flags &= ~(UNINTERESTING | BOTTOM | SEEN); | |
484 | } | |
485 | ||
486 | memset(&pi, 0, sizeof(pi)); | |
487 | init_ref_bitmap(&pi.ref_bitmap); | |
488 | pi.nr_bits = ref->nr; | |
489 | ||
490 | /* | |
491 | * "--not --all" to cut short the traversal if new refs | |
492 | * connect to old refs. If not (e.g. force ref updates) it'll | |
493 | * have to go down to the current shallow commits. | |
494 | */ | |
495 | head_ref(mark_uninteresting, NULL); | |
496 | for_each_ref(mark_uninteresting, NULL); | |
497 | ||
498 | /* Mark potential bottoms so we won't go out of bound */ | |
499 | for (i = 0; i < nr_shallow; i++) { | |
500 | struct commit *c = lookup_commit(sha1[shallow[i]]); | |
501 | c->object.flags |= BOTTOM; | |
502 | } | |
503 | ||
504 | for (i = 0; i < ref->nr; i++) | |
505 | paint_down(&pi, ref->sha1[i], i); | |
506 | ||
507 | if (used) { | |
508 | int bitmap_size = ((pi.nr_bits + 31) / 32) * sizeof(uint32_t); | |
509 | memset(used, 0, sizeof(*used) * info->shallow->nr); | |
510 | for (i = 0; i < nr_shallow; i++) { | |
511 | const struct commit *c = lookup_commit(sha1[shallow[i]]); | |
512 | uint32_t **map = ref_bitmap_at(&pi.ref_bitmap, c); | |
513 | if (*map) | |
514 | used[shallow[i]] = xmemdupz(*map, bitmap_size); | |
515 | } | |
516 | /* | |
517 | * unreachable shallow commits are not removed from | |
518 | * "ours" and "theirs". The user is supposed to run | |
519 | * step 7 on every ref separately and not trust "ours" | |
520 | * and "theirs" any more. | |
521 | */ | |
522 | } else | |
523 | post_assign_shallow(info, &pi.ref_bitmap, ref_status); | |
524 | ||
525 | clear_ref_bitmap(&pi.ref_bitmap); | |
526 | for (i = 0; i < pi.slab_count; i++) | |
527 | free(pi.slab[i]); | |
528 | free(pi.slab); | |
529 | free(shallow); | |
530 | } | |
531 | ||
532 | struct commit_array { | |
533 | struct commit **commits; | |
534 | int nr, alloc; | |
535 | }; | |
536 | ||
537 | static int add_ref(const char *refname, | |
538 | const unsigned char *sha1, int flags, void *cb_data) | |
539 | { | |
540 | struct commit_array *ca = cb_data; | |
541 | ALLOC_GROW(ca->commits, ca->nr + 1, ca->alloc); | |
542 | ca->commits[ca->nr] = lookup_commit_reference_gently(sha1, 1); | |
543 | if (ca->commits[ca->nr]) | |
544 | ca->nr++; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static void update_refstatus(int *ref_status, int nr, uint32_t *bitmap) | |
549 | { | |
550 | int i; | |
551 | if (!ref_status) | |
552 | return; | |
553 | for (i = 0; i < nr; i++) | |
554 | if (bitmap[i / 32] & (1 << (i % 32))) | |
555 | ref_status[i]++; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Step 7, reachability test on "ours" at commit level | |
560 | */ | |
561 | static void post_assign_shallow(struct shallow_info *info, | |
562 | struct ref_bitmap *ref_bitmap, | |
563 | int *ref_status) | |
564 | { | |
565 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
566 | struct commit *c; | |
567 | uint32_t **bitmap; | |
568 | int dst, i, j; | |
569 | int bitmap_nr = (info->ref->nr + 31) / 32; | |
570 | struct commit_array ca; | |
571 | ||
572 | trace_printf_key(TRACE_KEY, "shallow: post_assign_shallow\n"); | |
573 | if (ref_status) | |
574 | memset(ref_status, 0, sizeof(*ref_status) * info->ref->nr); | |
575 | ||
576 | /* Remove unreachable shallow commits from "theirs" */ | |
577 | for (i = dst = 0; i < info->nr_theirs; i++) { | |
578 | if (i != dst) | |
579 | info->theirs[dst] = info->theirs[i]; | |
580 | c = lookup_commit(sha1[info->theirs[i]]); | |
581 | bitmap = ref_bitmap_at(ref_bitmap, c); | |
582 | if (!*bitmap) | |
583 | continue; | |
584 | for (j = 0; j < bitmap_nr; j++) | |
585 | if (bitmap[0][j]) { | |
586 | update_refstatus(ref_status, info->ref->nr, *bitmap); | |
587 | dst++; | |
588 | break; | |
589 | } | |
590 | } | |
591 | info->nr_theirs = dst; | |
592 | ||
593 | memset(&ca, 0, sizeof(ca)); | |
594 | head_ref(add_ref, &ca); | |
595 | for_each_ref(add_ref, &ca); | |
596 | ||
597 | /* Remove unreachable shallow commits from "ours" */ | |
598 | for (i = dst = 0; i < info->nr_ours; i++) { | |
599 | if (i != dst) | |
600 | info->ours[dst] = info->ours[i]; | |
601 | c = lookup_commit(sha1[info->ours[i]]); | |
602 | bitmap = ref_bitmap_at(ref_bitmap, c); | |
603 | if (!*bitmap) | |
604 | continue; | |
605 | for (j = 0; j < bitmap_nr; j++) | |
606 | if (bitmap[0][j] && | |
607 | /* Step 7, reachability test at commit level */ | |
608 | !in_merge_bases_many(c, ca.nr, ca.commits)) { | |
609 | update_refstatus(ref_status, info->ref->nr, *bitmap); | |
610 | dst++; | |
611 | break; | |
612 | } | |
613 | } | |
614 | info->nr_ours = dst; | |
615 | ||
616 | free(ca.commits); | |
617 | } |