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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 | ||
069c0532 | 16 | void set_alternate_shallow_file(const char *path, int override) |
6035d6aa NTND |
17 | { |
18 | if (is_shallow != -1) | |
19 | die("BUG: is_repository_shallow must not be called before set_alternate_shallow_file"); | |
069c0532 NTND |
20 | if (alternate_shallow_file && !override) |
21 | return; | |
6035d6aa NTND |
22 | free(alternate_shallow_file); |
23 | alternate_shallow_file = path ? xstrdup(path) : NULL; | |
24 | } | |
ed09aef0 JS |
25 | |
26 | int register_shallow(const unsigned char *sha1) | |
27 | { | |
28 | struct commit_graft *graft = | |
29 | xmalloc(sizeof(struct commit_graft)); | |
30 | struct commit *commit = lookup_commit(sha1); | |
31 | ||
32 | hashcpy(graft->sha1, sha1); | |
33 | graft->nr_parent = -1; | |
34 | if (commit && commit->object.parsed) | |
35 | commit->parents = NULL; | |
36 | return register_commit_graft(graft, 0); | |
37 | } | |
38 | ||
f43117a6 | 39 | int is_repository_shallow(void) |
ed09aef0 JS |
40 | { |
41 | FILE *fp; | |
42 | char buf[1024]; | |
6035d6aa | 43 | const char *path = alternate_shallow_file; |
ed09aef0 JS |
44 | |
45 | if (is_shallow >= 0) | |
46 | return is_shallow; | |
47 | ||
6035d6aa NTND |
48 | if (!path) |
49 | path = git_path("shallow"); | |
50 | /* | |
51 | * fetch-pack sets '--shallow-file ""' as an indicator that no | |
52 | * shallow file should be used. We could just open it and it | |
53 | * will likely fail. But let's do an explicit check instead. | |
54 | */ | |
55 | if (!*path || | |
56 | stat(path, &shallow_stat) || | |
57 | (fp = fopen(path, "r")) == NULL) { | |
ed09aef0 JS |
58 | is_shallow = 0; |
59 | return is_shallow; | |
60 | } | |
61 | is_shallow = 1; | |
62 | ||
63 | while (fgets(buf, sizeof(buf), fp)) { | |
64 | unsigned char sha1[20]; | |
65 | if (get_sha1_hex(buf, sha1)) | |
66 | die("bad shallow line: %s", buf); | |
67 | register_shallow(sha1); | |
68 | } | |
69 | fclose(fp); | |
70 | return is_shallow; | |
71 | } | |
72 | ||
f53514bc JS |
73 | struct commit_list *get_shallow_commits(struct object_array *heads, int depth, |
74 | int shallow_flag, int not_shallow_flag) | |
ed09aef0 JS |
75 | { |
76 | int i = 0, cur_depth = 0; | |
77 | struct commit_list *result = NULL; | |
3cd47459 | 78 | struct object_array stack = OBJECT_ARRAY_INIT; |
ed09aef0 | 79 | struct commit *commit = NULL; |
79d3a236 | 80 | struct commit_graft *graft; |
ed09aef0 JS |
81 | |
82 | while (commit || i < heads->nr || stack.nr) { | |
83 | struct commit_list *p; | |
84 | if (!commit) { | |
85 | if (i < heads->nr) { | |
86 | commit = (struct commit *) | |
abef3a16 | 87 | deref_tag(heads->objects[i++].item, NULL, 0); |
affeef12 | 88 | if (!commit || commit->object.type != OBJ_COMMIT) { |
ed09aef0 JS |
89 | commit = NULL; |
90 | continue; | |
91 | } | |
d64d6c9f AJ |
92 | if (!commit->util) |
93 | commit->util = xmalloc(sizeof(int)); | |
94 | *(int *)commit->util = 0; | |
ed09aef0 JS |
95 | cur_depth = 0; |
96 | } else { | |
97 | commit = (struct commit *) | |
98 | stack.objects[--stack.nr].item; | |
99 | cur_depth = *(int *)commit->util; | |
100 | } | |
101 | } | |
367068e0 | 102 | parse_commit_or_die(commit); |
ed09aef0 | 103 | cur_depth++; |
79d3a236 NTND |
104 | if ((depth != INFINITE_DEPTH && cur_depth >= depth) || |
105 | (is_repository_shallow() && !commit->parents && | |
106 | (graft = lookup_commit_graft(commit->object.sha1)) != NULL && | |
107 | graft->nr_parent < 0)) { | |
682c7d2f NTND |
108 | commit_list_insert(commit, &result); |
109 | commit->object.flags |= shallow_flag; | |
110 | commit = NULL; | |
111 | continue; | |
112 | } | |
113 | commit->object.flags |= not_shallow_flag; | |
ed09aef0 JS |
114 | for (p = commit->parents, commit = NULL; p; p = p->next) { |
115 | if (!p->item->util) { | |
116 | int *pointer = xmalloc(sizeof(int)); | |
117 | p->item->util = pointer; | |
118 | *pointer = cur_depth; | |
119 | } else { | |
120 | int *pointer = p->item->util; | |
121 | if (cur_depth >= *pointer) | |
122 | continue; | |
123 | *pointer = cur_depth; | |
124 | } | |
4b796951 MK |
125 | if (p->next) |
126 | add_object_array(&p->item->object, | |
127 | NULL, &stack); | |
128 | else { | |
129 | commit = p->item; | |
130 | cur_depth = *(int *)commit->util; | |
f53514bc | 131 | } |
ed09aef0 JS |
132 | } |
133 | } | |
134 | ||
135 | return result; | |
136 | } | |
6035d6aa NTND |
137 | |
138 | void check_shallow_file_for_update(void) | |
139 | { | |
140 | struct stat st; | |
141 | ||
142 | if (!is_shallow) | |
143 | return; | |
144 | else if (is_shallow == -1) | |
145 | die("BUG: shallow must be initialized by now"); | |
146 | ||
147 | if (stat(git_path("shallow"), &st)) | |
148 | die("shallow file was removed during fetch"); | |
149 | else if (st.st_mtime != shallow_stat.st_mtime | |
150 | #ifdef USE_NSEC | |
151 | || ST_MTIME_NSEC(st) != ST_MTIME_NSEC(shallow_stat) | |
152 | #endif | |
153 | ) | |
154 | die("shallow file was changed during fetch"); | |
155 | } | |
3125fe52 | 156 | |
eab3296c NTND |
157 | #define SEEN_ONLY 1 |
158 | #define VERBOSE 2 | |
159 | ||
3125fe52 NTND |
160 | struct write_shallow_data { |
161 | struct strbuf *out; | |
162 | int use_pack_protocol; | |
163 | int count; | |
eab3296c | 164 | unsigned flags; |
3125fe52 NTND |
165 | }; |
166 | ||
167 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
168 | { | |
169 | struct write_shallow_data *data = cb_data; | |
170 | const char *hex = sha1_to_hex(graft->sha1); | |
6a3bbb4d NTND |
171 | if (graft->nr_parent != -1) |
172 | return 0; | |
eab3296c NTND |
173 | if (data->flags & SEEN_ONLY) { |
174 | struct commit *c = lookup_commit(graft->sha1); | |
175 | if (!c || !(c->object.flags & SEEN)) { | |
176 | if (data->flags & VERBOSE) | |
177 | printf("Removing %s from .git/shallow\n", | |
178 | sha1_to_hex(c->object.sha1)); | |
179 | return 0; | |
180 | } | |
181 | } | |
3125fe52 NTND |
182 | data->count++; |
183 | if (data->use_pack_protocol) | |
184 | packet_buf_write(data->out, "shallow %s", hex); | |
185 | else { | |
186 | strbuf_addstr(data->out, hex); | |
187 | strbuf_addch(data->out, '\n'); | |
188 | } | |
189 | return 0; | |
190 | } | |
191 | ||
eab3296c NTND |
192 | static int write_shallow_commits_1(struct strbuf *out, int use_pack_protocol, |
193 | const struct sha1_array *extra, | |
194 | unsigned flags) | |
3125fe52 NTND |
195 | { |
196 | struct write_shallow_data data; | |
1a30f5a2 | 197 | int i; |
3125fe52 NTND |
198 | data.out = out; |
199 | data.use_pack_protocol = use_pack_protocol; | |
200 | data.count = 0; | |
eab3296c | 201 | data.flags = flags; |
3125fe52 | 202 | for_each_commit_graft(write_one_shallow, &data); |
1a30f5a2 NTND |
203 | if (!extra) |
204 | return data.count; | |
205 | for (i = 0; i < extra->nr; i++) { | |
206 | strbuf_addstr(out, sha1_to_hex(extra->sha1[i])); | |
207 | strbuf_addch(out, '\n'); | |
208 | data.count++; | |
209 | } | |
3125fe52 NTND |
210 | return data.count; |
211 | } | |
212 | ||
eab3296c NTND |
213 | int write_shallow_commits(struct strbuf *out, int use_pack_protocol, |
214 | const struct sha1_array *extra) | |
215 | { | |
216 | return write_shallow_commits_1(out, use_pack_protocol, extra, 0); | |
217 | } | |
218 | ||
1a30f5a2 | 219 | char *setup_temporary_shallow(const struct sha1_array *extra) |
08ea65ad NTND |
220 | { |
221 | struct strbuf sb = STRBUF_INIT; | |
222 | int fd; | |
223 | ||
1a30f5a2 | 224 | if (write_shallow_commits(&sb, 0, extra)) { |
08ea65ad NTND |
225 | struct strbuf path = STRBUF_INIT; |
226 | strbuf_addstr(&path, git_path("shallow_XXXXXX")); | |
227 | fd = xmkstemp(path.buf); | |
228 | if (write_in_full(fd, sb.buf, sb.len) != sb.len) | |
229 | die_errno("failed to write to %s", | |
230 | path.buf); | |
231 | close(fd); | |
232 | strbuf_release(&sb); | |
233 | return strbuf_detach(&path, NULL); | |
234 | } | |
235 | /* | |
236 | * is_repository_shallow() sees empty string as "no shallow | |
237 | * file". | |
238 | */ | |
239 | return xstrdup(""); | |
240 | } | |
241 | ||
3125fe52 | 242 | void setup_alternate_shallow(struct lock_file *shallow_lock, |
1a30f5a2 NTND |
243 | const char **alternate_shallow_file, |
244 | const struct sha1_array *extra) | |
3125fe52 NTND |
245 | { |
246 | struct strbuf sb = STRBUF_INIT; | |
247 | int fd; | |
248 | ||
249 | check_shallow_file_for_update(); | |
250 | fd = hold_lock_file_for_update(shallow_lock, git_path("shallow"), | |
251 | LOCK_DIE_ON_ERROR); | |
1a30f5a2 | 252 | if (write_shallow_commits(&sb, 0, extra)) { |
3125fe52 NTND |
253 | if (write_in_full(fd, sb.buf, sb.len) != sb.len) |
254 | die_errno("failed to write to %s", | |
255 | shallow_lock->filename); | |
256 | *alternate_shallow_file = shallow_lock->filename; | |
257 | } else | |
258 | /* | |
259 | * is_repository_shallow() sees empty string as "no | |
260 | * shallow file". | |
261 | */ | |
262 | *alternate_shallow_file = ""; | |
263 | strbuf_release(&sb); | |
264 | } | |
ad491366 NTND |
265 | |
266 | static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb) | |
267 | { | |
268 | int fd = *(int *)cb; | |
269 | if (graft->nr_parent == -1) | |
270 | packet_write(fd, "shallow %s\n", sha1_to_hex(graft->sha1)); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | void advertise_shallow_grafts(int fd) | |
275 | { | |
276 | if (!is_repository_shallow()) | |
277 | return; | |
278 | for_each_commit_graft(advertise_shallow_grafts_cb, &fd); | |
279 | } | |
58babfff | 280 | |
eab3296c NTND |
281 | /* |
282 | * mark_reachable_objects() should have been run prior to this and all | |
283 | * reachable commits marked as "SEEN". | |
284 | */ | |
285 | void prune_shallow(int show_only) | |
286 | { | |
287 | static struct lock_file shallow_lock; | |
288 | struct strbuf sb = STRBUF_INIT; | |
289 | int fd; | |
290 | ||
291 | if (show_only) { | |
292 | write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY | VERBOSE); | |
293 | strbuf_release(&sb); | |
294 | return; | |
295 | } | |
296 | check_shallow_file_for_update(); | |
297 | fd = hold_lock_file_for_update(&shallow_lock, git_path("shallow"), | |
298 | LOCK_DIE_ON_ERROR); | |
299 | if (write_shallow_commits_1(&sb, 0, NULL, SEEN_ONLY)) { | |
300 | if (write_in_full(fd, sb.buf, sb.len) != sb.len) | |
301 | die_errno("failed to write to %s", | |
302 | shallow_lock.filename); | |
303 | commit_lock_file(&shallow_lock); | |
304 | } else { | |
305 | unlink(git_path("shallow")); | |
306 | rollback_lock_file(&shallow_lock); | |
307 | } | |
308 | strbuf_release(&sb); | |
309 | } | |
310 | ||
58babfff NTND |
311 | #define TRACE_KEY "GIT_TRACE_SHALLOW" |
312 | ||
313 | /* | |
314 | * Step 1, split sender shallow commits into "ours" and "theirs" | |
315 | * Step 2, clean "ours" based on .git/shallow | |
316 | */ | |
317 | void prepare_shallow_info(struct shallow_info *info, struct sha1_array *sa) | |
318 | { | |
319 | int i; | |
320 | trace_printf_key(TRACE_KEY, "shallow: prepare_shallow_info\n"); | |
321 | memset(info, 0, sizeof(*info)); | |
322 | info->shallow = sa; | |
323 | if (!sa) | |
324 | return; | |
325 | info->ours = xmalloc(sizeof(*info->ours) * sa->nr); | |
326 | info->theirs = xmalloc(sizeof(*info->theirs) * sa->nr); | |
327 | for (i = 0; i < sa->nr; i++) { | |
328 | if (has_sha1_file(sa->sha1[i])) { | |
329 | struct commit_graft *graft; | |
330 | graft = lookup_commit_graft(sa->sha1[i]); | |
331 | if (graft && graft->nr_parent < 0) | |
332 | continue; | |
333 | info->ours[info->nr_ours++] = i; | |
334 | } else | |
335 | info->theirs[info->nr_theirs++] = i; | |
336 | } | |
337 | } | |
338 | ||
339 | void clear_shallow_info(struct shallow_info *info) | |
340 | { | |
341 | free(info->ours); | |
342 | free(info->theirs); | |
343 | } | |
344 | ||
345 | /* Step 4, remove non-existent ones in "theirs" after getting the pack */ | |
346 | ||
347 | void remove_nonexistent_theirs_shallow(struct shallow_info *info) | |
348 | { | |
349 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
350 | int i, dst; | |
351 | trace_printf_key(TRACE_KEY, "shallow: remove_nonexistent_theirs_shallow\n"); | |
352 | for (i = dst = 0; i < info->nr_theirs; i++) { | |
353 | if (i != dst) | |
354 | info->theirs[dst] = info->theirs[i]; | |
355 | if (has_sha1_file(sha1[info->theirs[i]])) | |
356 | dst++; | |
357 | } | |
358 | info->nr_theirs = dst; | |
359 | } | |
360 | ||
8e277383 NTND |
361 | define_commit_slab(ref_bitmap, uint32_t *); |
362 | ||
363 | struct paint_info { | |
364 | struct ref_bitmap ref_bitmap; | |
365 | unsigned nr_bits; | |
366 | char **slab; | |
367 | char *free, *end; | |
368 | unsigned slab_count; | |
369 | }; | |
370 | ||
371 | static uint32_t *paint_alloc(struct paint_info *info) | |
372 | { | |
373 | unsigned nr = (info->nr_bits + 31) / 32; | |
374 | unsigned size = nr * sizeof(uint32_t); | |
375 | void *p; | |
376 | if (!info->slab_count || info->free + size > info->end) { | |
377 | info->slab_count++; | |
378 | info->slab = xrealloc(info->slab, | |
379 | info->slab_count * sizeof(*info->slab)); | |
380 | info->free = xmalloc(COMMIT_SLAB_SIZE); | |
381 | info->slab[info->slab_count - 1] = info->free; | |
382 | info->end = info->free + COMMIT_SLAB_SIZE; | |
383 | } | |
384 | p = info->free; | |
385 | info->free += size; | |
386 | return p; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Given a commit SHA-1, walk down to parents until either SEEN, | |
391 | * UNINTERESTING or BOTTOM is hit. Set the id-th bit in ref_bitmap for | |
392 | * all walked commits. | |
393 | */ | |
394 | static void paint_down(struct paint_info *info, const unsigned char *sha1, | |
395 | int id) | |
396 | { | |
397 | unsigned int i, nr; | |
398 | struct commit_list *head = NULL; | |
399 | int bitmap_nr = (info->nr_bits + 31) / 32; | |
400 | int bitmap_size = bitmap_nr * sizeof(uint32_t); | |
401 | uint32_t *tmp = xmalloc(bitmap_size); /* to be freed before return */ | |
402 | uint32_t *bitmap = paint_alloc(info); | |
403 | struct commit *c = lookup_commit_reference_gently(sha1, 1); | |
404 | if (!c) | |
405 | return; | |
406 | memset(bitmap, 0, bitmap_size); | |
407 | bitmap[id / 32] |= (1 << (id % 32)); | |
408 | commit_list_insert(c, &head); | |
409 | while (head) { | |
410 | struct commit_list *p; | |
411 | struct commit *c = head->item; | |
412 | uint32_t **refs = ref_bitmap_at(&info->ref_bitmap, c); | |
413 | ||
414 | p = head; | |
415 | head = head->next; | |
416 | free(p); | |
417 | ||
418 | /* XXX check "UNINTERESTING" from pack bitmaps if available */ | |
419 | if (c->object.flags & (SEEN | UNINTERESTING)) | |
420 | continue; | |
421 | else | |
422 | c->object.flags |= SEEN; | |
423 | ||
424 | if (*refs == NULL) | |
425 | *refs = bitmap; | |
426 | else { | |
427 | memcpy(tmp, *refs, bitmap_size); | |
428 | for (i = 0; i < bitmap_nr; i++) | |
429 | tmp[i] |= bitmap[i]; | |
430 | if (memcmp(tmp, *refs, bitmap_size)) { | |
431 | *refs = paint_alloc(info); | |
432 | memcpy(*refs, tmp, bitmap_size); | |
433 | } | |
434 | } | |
435 | ||
436 | if (c->object.flags & BOTTOM) | |
437 | continue; | |
438 | ||
439 | if (parse_commit(c)) | |
440 | die("unable to parse commit %s", | |
441 | sha1_to_hex(c->object.sha1)); | |
442 | ||
443 | for (p = c->parents; p; p = p->next) { | |
444 | uint32_t **p_refs = ref_bitmap_at(&info->ref_bitmap, | |
445 | p->item); | |
446 | if (p->item->object.flags & SEEN) | |
447 | continue; | |
448 | if (*p_refs == NULL || *p_refs == *refs) | |
449 | *p_refs = *refs; | |
450 | commit_list_insert(p->item, &head); | |
451 | } | |
452 | } | |
453 | ||
454 | nr = get_max_object_index(); | |
455 | for (i = 0; i < nr; i++) { | |
456 | struct object *o = get_indexed_object(i); | |
457 | if (o && o->type == OBJ_COMMIT) | |
458 | o->flags &= ~SEEN; | |
459 | } | |
460 | ||
461 | free(tmp); | |
462 | } | |
463 | ||
464 | static int mark_uninteresting(const char *refname, | |
465 | const unsigned char *sha1, | |
466 | int flags, void *cb_data) | |
467 | { | |
468 | struct commit *commit = lookup_commit_reference_gently(sha1, 1); | |
469 | if (!commit) | |
470 | return 0; | |
471 | commit->object.flags |= UNINTERESTING; | |
472 | mark_parents_uninteresting(commit); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | static void post_assign_shallow(struct shallow_info *info, | |
477 | struct ref_bitmap *ref_bitmap, | |
478 | int *ref_status); | |
479 | /* | |
480 | * Step 6(+7), associate shallow commits with new refs | |
481 | * | |
482 | * info->ref must be initialized before calling this function. | |
483 | * | |
484 | * If used is not NULL, it's an array of info->shallow->nr | |
485 | * bitmaps. The n-th bit set in the m-th bitmap if ref[n] needs the | |
486 | * m-th shallow commit from info->shallow. | |
487 | * | |
488 | * If used is NULL, "ours" and "theirs" are updated. And if ref_status | |
489 | * is not NULL it's an array of ref->nr ints. ref_status[i] is true if | |
490 | * the ref needs some shallow commits from either info->ours or | |
491 | * info->theirs. | |
492 | */ | |
493 | void assign_shallow_commits_to_refs(struct shallow_info *info, | |
494 | uint32_t **used, int *ref_status) | |
495 | { | |
496 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
497 | struct sha1_array *ref = info->ref; | |
498 | unsigned int i, nr; | |
499 | int *shallow, nr_shallow = 0; | |
500 | struct paint_info pi; | |
501 | ||
502 | trace_printf_key(TRACE_KEY, "shallow: assign_shallow_commits_to_refs\n"); | |
503 | shallow = xmalloc(sizeof(*shallow) * (info->nr_ours + info->nr_theirs)); | |
504 | for (i = 0; i < info->nr_ours; i++) | |
505 | shallow[nr_shallow++] = info->ours[i]; | |
506 | for (i = 0; i < info->nr_theirs; i++) | |
507 | shallow[nr_shallow++] = info->theirs[i]; | |
508 | ||
509 | /* | |
510 | * Prepare the commit graph to track what refs can reach what | |
511 | * (new) shallow commits. | |
512 | */ | |
513 | nr = get_max_object_index(); | |
514 | for (i = 0; i < nr; i++) { | |
515 | struct object *o = get_indexed_object(i); | |
516 | if (!o || o->type != OBJ_COMMIT) | |
517 | continue; | |
518 | ||
519 | o->flags &= ~(UNINTERESTING | BOTTOM | SEEN); | |
520 | } | |
521 | ||
522 | memset(&pi, 0, sizeof(pi)); | |
523 | init_ref_bitmap(&pi.ref_bitmap); | |
524 | pi.nr_bits = ref->nr; | |
525 | ||
526 | /* | |
527 | * "--not --all" to cut short the traversal if new refs | |
528 | * connect to old refs. If not (e.g. force ref updates) it'll | |
529 | * have to go down to the current shallow commits. | |
530 | */ | |
531 | head_ref(mark_uninteresting, NULL); | |
532 | for_each_ref(mark_uninteresting, NULL); | |
533 | ||
534 | /* Mark potential bottoms so we won't go out of bound */ | |
535 | for (i = 0; i < nr_shallow; i++) { | |
536 | struct commit *c = lookup_commit(sha1[shallow[i]]); | |
537 | c->object.flags |= BOTTOM; | |
538 | } | |
539 | ||
540 | for (i = 0; i < ref->nr; i++) | |
541 | paint_down(&pi, ref->sha1[i], i); | |
542 | ||
543 | if (used) { | |
544 | int bitmap_size = ((pi.nr_bits + 31) / 32) * sizeof(uint32_t); | |
545 | memset(used, 0, sizeof(*used) * info->shallow->nr); | |
546 | for (i = 0; i < nr_shallow; i++) { | |
547 | const struct commit *c = lookup_commit(sha1[shallow[i]]); | |
548 | uint32_t **map = ref_bitmap_at(&pi.ref_bitmap, c); | |
549 | if (*map) | |
550 | used[shallow[i]] = xmemdupz(*map, bitmap_size); | |
551 | } | |
552 | /* | |
553 | * unreachable shallow commits are not removed from | |
554 | * "ours" and "theirs". The user is supposed to run | |
555 | * step 7 on every ref separately and not trust "ours" | |
556 | * and "theirs" any more. | |
557 | */ | |
558 | } else | |
559 | post_assign_shallow(info, &pi.ref_bitmap, ref_status); | |
560 | ||
561 | clear_ref_bitmap(&pi.ref_bitmap); | |
562 | for (i = 0; i < pi.slab_count; i++) | |
563 | free(pi.slab[i]); | |
564 | free(pi.slab); | |
565 | free(shallow); | |
566 | } | |
567 | ||
568 | struct commit_array { | |
569 | struct commit **commits; | |
570 | int nr, alloc; | |
571 | }; | |
572 | ||
573 | static int add_ref(const char *refname, | |
574 | const unsigned char *sha1, int flags, void *cb_data) | |
575 | { | |
576 | struct commit_array *ca = cb_data; | |
577 | ALLOC_GROW(ca->commits, ca->nr + 1, ca->alloc); | |
578 | ca->commits[ca->nr] = lookup_commit_reference_gently(sha1, 1); | |
579 | if (ca->commits[ca->nr]) | |
580 | ca->nr++; | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static void update_refstatus(int *ref_status, int nr, uint32_t *bitmap) | |
585 | { | |
586 | int i; | |
587 | if (!ref_status) | |
588 | return; | |
589 | for (i = 0; i < nr; i++) | |
590 | if (bitmap[i / 32] & (1 << (i % 32))) | |
591 | ref_status[i]++; | |
592 | } | |
593 | ||
594 | /* | |
595 | * Step 7, reachability test on "ours" at commit level | |
596 | */ | |
597 | static void post_assign_shallow(struct shallow_info *info, | |
598 | struct ref_bitmap *ref_bitmap, | |
599 | int *ref_status) | |
600 | { | |
601 | unsigned char (*sha1)[20] = info->shallow->sha1; | |
602 | struct commit *c; | |
603 | uint32_t **bitmap; | |
604 | int dst, i, j; | |
605 | int bitmap_nr = (info->ref->nr + 31) / 32; | |
606 | struct commit_array ca; | |
607 | ||
608 | trace_printf_key(TRACE_KEY, "shallow: post_assign_shallow\n"); | |
609 | if (ref_status) | |
610 | memset(ref_status, 0, sizeof(*ref_status) * info->ref->nr); | |
611 | ||
612 | /* Remove unreachable shallow commits from "theirs" */ | |
613 | for (i = dst = 0; i < info->nr_theirs; i++) { | |
614 | if (i != dst) | |
615 | info->theirs[dst] = info->theirs[i]; | |
616 | c = lookup_commit(sha1[info->theirs[i]]); | |
617 | bitmap = ref_bitmap_at(ref_bitmap, c); | |
618 | if (!*bitmap) | |
619 | continue; | |
620 | for (j = 0; j < bitmap_nr; j++) | |
621 | if (bitmap[0][j]) { | |
622 | update_refstatus(ref_status, info->ref->nr, *bitmap); | |
623 | dst++; | |
624 | break; | |
625 | } | |
626 | } | |
627 | info->nr_theirs = dst; | |
628 | ||
629 | memset(&ca, 0, sizeof(ca)); | |
630 | head_ref(add_ref, &ca); | |
631 | for_each_ref(add_ref, &ca); | |
632 | ||
633 | /* Remove unreachable shallow commits from "ours" */ | |
634 | for (i = dst = 0; i < info->nr_ours; i++) { | |
635 | if (i != dst) | |
636 | info->ours[dst] = info->ours[i]; | |
637 | c = lookup_commit(sha1[info->ours[i]]); | |
638 | bitmap = ref_bitmap_at(ref_bitmap, c); | |
639 | if (!*bitmap) | |
640 | continue; | |
641 | for (j = 0; j < bitmap_nr; j++) | |
642 | if (bitmap[0][j] && | |
643 | /* Step 7, reachability test at commit level */ | |
644 | !in_merge_bases_many(c, ca.nr, ca.commits)) { | |
645 | update_refstatus(ref_status, info->ref->nr, *bitmap); | |
646 | dst++; | |
647 | break; | |
648 | } | |
649 | } | |
650 | info->nr_ours = dst; | |
651 | ||
652 | free(ca.commits); | |
653 | } | |
0a1bc12b NTND |
654 | |
655 | /* (Delayed) step 7, reachability test at commit level */ | |
656 | int delayed_reachability_test(struct shallow_info *si, int c) | |
657 | { | |
658 | if (si->need_reachability_test[c]) { | |
659 | struct commit *commit = lookup_commit(si->shallow->sha1[c]); | |
660 | ||
661 | if (!si->commits) { | |
662 | struct commit_array ca; | |
663 | memset(&ca, 0, sizeof(ca)); | |
664 | head_ref(add_ref, &ca); | |
665 | for_each_ref(add_ref, &ca); | |
666 | si->commits = ca.commits; | |
667 | si->nr_commits = ca.nr; | |
668 | } | |
669 | ||
670 | si->reachable[c] = in_merge_bases_many(commit, | |
671 | si->nr_commits, | |
672 | si->commits); | |
673 | si->need_reachability_test[c] = 0; | |
674 | } | |
675 | return si->reachable[c]; | |
676 | } |