0b4a9f288f973a13ab8c55b420d52143ee1d026d
1#include "cache.h"
2#include "repository.h"
3#include "config.h"
4#include "lockfile.h"
5#include "refs.h"
6#include "pkt-line.h"
7#include "commit.h"
8#include "tag.h"
9#include "exec-cmd.h"
10#include "pack.h"
11#include "sideband.h"
12#include "fetch-pack.h"
13#include "remote.h"
14#include "run-command.h"
15#include "connect.h"
16#include "transport.h"
17#include "version.h"
18#include "prio-queue.h"
19#include "sha1-array.h"
20#include "oidset.h"
21#include "packfile.h"
22static int transfer_unpack_limit = -1;
24static int fetch_unpack_limit = -1;
25static int unpack_limit = 100;
26static int prefer_ofs_delta = 1;
27static int no_done;
28static int deepen_since_ok;
29static int deepen_not_ok;
30static int fetch_fsck_objects = -1;
31static int transfer_fsck_objects = -1;
32static int agent_supported;
33static int server_supports_filtering;
34static struct lock_file shallow_lock;
35static const char *alternate_shallow_file;
36/* Remember to update object flag allocation in object.h */
38#define COMPLETE (1U << 0)
39#define COMMON (1U << 1)
40#define COMMON_REF (1U << 2)
41#define SEEN (1U << 3)
42#define POPPED (1U << 4)
43#define ALTERNATE (1U << 5)
44static int marked;
46/*
48 * After sending this many "have"s if we do not get any new ACK , we
49 * give up traversing our history.
50 */
51#define MAX_IN_VAIN 256
52static struct prio_queue rev_list = { compare_commits_by_commit_date };
54static int non_common_revs, multi_ack, use_sideband;
55/* Allow specifying sha1 if it is a ref tip. */
56#define ALLOW_TIP_SHA1 01
57/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
58#define ALLOW_REACHABLE_SHA1 02
59static unsigned int allow_unadvertised_object_request;
60__attribute__((format (printf, 2, 3)))
62static inline void print_verbose(const struct fetch_pack_args *args,
63 const char *fmt, ...)
64{
65 va_list params;
66 if (!args->verbose)
68 return;
69 va_start(params, fmt);
71 vfprintf(stderr, fmt, params);
72 va_end(params);
73 fputc('\n', stderr);
74}
75struct alternate_object_cache {
77 struct object **items;
78 size_t nr, alloc;
79};
80static void cache_one_alternate(const char *refname,
82 const struct object_id *oid,
83 void *vcache)
84{
85 struct alternate_object_cache *cache = vcache;
86 struct object *obj = parse_object(oid);
87 if (!obj || (obj->flags & ALTERNATE))
89 return;
90 obj->flags |= ALTERNATE;
92 ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
93 cache->items[cache->nr++] = obj;
94}
95static void for_each_cached_alternate(void (*cb)(struct object *))
97{
98 static int initialized;
99 static struct alternate_object_cache cache;
100 size_t i;
101 if (!initialized) {
103 for_each_alternate_ref(cache_one_alternate, &cache);
104 initialized = 1;
105 }
106 for (i = 0; i < cache.nr; i++)
108 cb(cache.items[i]);
109}
110static void rev_list_push(struct commit *commit, int mark)
112{
113 if (!(commit->object.flags & mark)) {
114 commit->object.flags |= mark;
115 if (parse_commit(commit))
117 return;
118 prio_queue_put(&rev_list, commit);
120 if (!(commit->object.flags & COMMON))
122 non_common_revs++;
123 }
124}
125static int rev_list_insert_ref(const char *refname, const struct object_id *oid)
127{
128 struct object *o = deref_tag(parse_object(oid), refname, 0);
129 if (o && o->type == OBJ_COMMIT)
131 rev_list_push((struct commit *)o, SEEN);
132 return 0;
134}
135static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
137 int flag, void *cb_data)
138{
139 return rev_list_insert_ref(refname, oid);
140}
141static int clear_marks(const char *refname, const struct object_id *oid,
143 int flag, void *cb_data)
144{
145 struct object *o = deref_tag(parse_object(oid), refname, 0);
146 if (o && o->type == OBJ_COMMIT)
148 clear_commit_marks((struct commit *)o,
149 COMMON | COMMON_REF | SEEN | POPPED);
150 return 0;
151}
152/*
154 This function marks a rev and its ancestors as common.
155 In some cases, it is desirable to mark only the ancestors (for example
156 when only the server does not yet know that they are common).
157*/
158static void mark_common(struct commit *commit,
160 int ancestors_only, int dont_parse)
161{
162 if (commit != NULL && !(commit->object.flags & COMMON)) {
163 struct object *o = (struct object *)commit;
164 if (!ancestors_only)
166 o->flags |= COMMON;
167 if (!(o->flags & SEEN))
169 rev_list_push(commit, SEEN);
170 else {
171 struct commit_list *parents;
172 if (!ancestors_only && !(o->flags & POPPED))
174 non_common_revs--;
175 if (!o->parsed && !dont_parse)
176 if (parse_commit(commit))
177 return;
178 for (parents = commit->parents;
180 parents;
181 parents = parents->next)
182 mark_common(parents->item, 0, dont_parse);
183 }
184 }
185}
186/*
188 Get the next rev to send, ignoring the common.
189*/
190static const struct object_id *get_rev(void)
192{
193 struct commit *commit = NULL;
194 while (commit == NULL) {
196 unsigned int mark;
197 struct commit_list *parents;
198 if (rev_list.nr == 0 || non_common_revs == 0)
200 return NULL;
201 commit = prio_queue_get(&rev_list);
203 parse_commit(commit);
204 parents = commit->parents;
205 commit->object.flags |= POPPED;
207 if (!(commit->object.flags & COMMON))
208 non_common_revs--;
209 if (commit->object.flags & COMMON) {
211 /* do not send "have", and ignore ancestors */
212 commit = NULL;
213 mark = COMMON | SEEN;
214 } else if (commit->object.flags & COMMON_REF)
215 /* send "have", and ignore ancestors */
216 mark = COMMON | SEEN;
217 else
218 /* send "have", also for its ancestors */
219 mark = SEEN;
220 while (parents) {
222 if (!(parents->item->object.flags & SEEN))
223 rev_list_push(parents->item, mark);
224 if (mark & COMMON)
225 mark_common(parents->item, 1, 0);
226 parents = parents->next;
227 }
228 }
229 return &commit->object.oid;
231}
232enum ack_type {
234 NAK = 0,
235 ACK,
236 ACK_continue,
237 ACK_common,
238 ACK_ready
239};
240static void consume_shallow_list(struct fetch_pack_args *args, int fd)
242{
243 if (args->stateless_rpc && args->deepen) {
244 /* If we sent a depth we will get back "duplicate"
245 * shallow and unshallow commands every time there
246 * is a block of have lines exchanged.
247 */
248 char *line;
249 while ((line = packet_read_line(fd, NULL))) {
250 if (starts_with(line, "shallow "))
251 continue;
252 if (starts_with(line, "unshallow "))
253 continue;
254 die(_("git fetch-pack: expected shallow list"));
255 }
256 }
257}
258static enum ack_type get_ack(int fd, struct object_id *result_oid)
260{
261 int len;
262 char *line = packet_read_line(fd, &len);
263 const char *arg;
264 if (!line)
266 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
267 if (!strcmp(line, "NAK"))
268 return NAK;
269 if (skip_prefix(line, "ACK ", &arg)) {
270 if (!get_oid_hex(arg, result_oid)) {
271 arg += 40;
272 len -= arg - line;
273 if (len < 1)
274 return ACK;
275 if (strstr(arg, "continue"))
276 return ACK_continue;
277 if (strstr(arg, "common"))
278 return ACK_common;
279 if (strstr(arg, "ready"))
280 return ACK_ready;
281 return ACK;
282 }
283 }
284 if (skip_prefix(line, "ERR ", &arg))
285 die(_("remote error: %s"), arg);
286 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), line);
287}
288static void send_request(struct fetch_pack_args *args,
290 int fd, struct strbuf *buf)
291{
292 if (args->stateless_rpc) {
293 send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
294 packet_flush(fd);
295 } else
296 write_or_die(fd, buf->buf, buf->len);
297}
298static void insert_one_alternate_object(struct object *obj)
300{
301 rev_list_insert_ref(NULL, &obj->oid);
302}
303#define INITIAL_FLUSH 16
305#define PIPESAFE_FLUSH 32
306#define LARGE_FLUSH 16384
307static int next_flush(int stateless_rpc, int count)
309{
310 if (stateless_rpc) {
311 if (count < LARGE_FLUSH)
312 count <<= 1;
313 else
314 count = count * 11 / 10;
315 } else {
316 if (count < PIPESAFE_FLUSH)
317 count <<= 1;
318 else
319 count += PIPESAFE_FLUSH;
320 }
321 return count;
322}
323static int find_common(struct fetch_pack_args *args,
325 int fd[2], struct object_id *result_oid,
326 struct ref *refs)
327{
328 int fetching;
329 int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
330 const struct object_id *oid;
331 unsigned in_vain = 0;
332 int got_continue = 0;
333 int got_ready = 0;
334 struct strbuf req_buf = STRBUF_INIT;
335 size_t state_len = 0;
336 if (args->stateless_rpc && multi_ack == 1)
338 die(_("--stateless-rpc requires multi_ack_detailed"));
339 if (marked)
340 for_each_ref(clear_marks, NULL);
341 marked = 1;
342 for_each_ref(rev_list_insert_ref_oid, NULL);
344 for_each_cached_alternate(insert_one_alternate_object);
345 fetching = 0;
347 for ( ; refs ; refs = refs->next) {
348 struct object_id *remote = &refs->old_oid;
349 const char *remote_hex;
350 struct object *o;
351 /*
353 * If that object is complete (i.e. it is an ancestor of a
354 * local ref), we tell them we have it but do not have to
355 * tell them about its ancestors, which they already know
356 * about.
357 *
358 * We use lookup_object here because we are only
359 * interested in the case we *know* the object is
360 * reachable and we have already scanned it.
361 */
362 if (((o = lookup_object(remote->hash)) != NULL) &&
363 (o->flags & COMPLETE)) {
364 continue;
365 }
366 remote_hex = oid_to_hex(remote);
368 if (!fetching) {
369 struct strbuf c = STRBUF_INIT;
370 if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
371 if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
372 if (no_done) strbuf_addstr(&c, " no-done");
373 if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
374 if (use_sideband == 1) strbuf_addstr(&c, " side-band");
375 if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
376 if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
377 if (args->no_progress) strbuf_addstr(&c, " no-progress");
378 if (args->include_tag) strbuf_addstr(&c, " include-tag");
379 if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
380 if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
381 if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
382 if (agent_supported) strbuf_addf(&c, " agent=%s",
383 git_user_agent_sanitized());
384 if (args->filter_options.choice)
385 strbuf_addstr(&c, " filter");
386 packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
387 strbuf_release(&c);
388 } else
389 packet_buf_write(&req_buf, "want %s\n", remote_hex);
390 fetching++;
391 }
392 if (!fetching) {
394 strbuf_release(&req_buf);
395 packet_flush(fd[1]);
396 return 1;
397 }
398 if (is_repository_shallow())
400 write_shallow_commits(&req_buf, 1, NULL);
401 if (args->depth > 0)
402 packet_buf_write(&req_buf, "deepen %d", args->depth);
403 if (args->deepen_since) {
404 timestamp_t max_age = approxidate(args->deepen_since);
405 packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
406 }
407 if (args->deepen_not) {
408 int i;
409 for (i = 0; i < args->deepen_not->nr; i++) {
410 struct string_list_item *s = args->deepen_not->items + i;
411 packet_buf_write(&req_buf, "deepen-not %s", s->string);
412 }
413 }
414 if (server_supports_filtering && args->filter_options.choice)
415 packet_buf_write(&req_buf, "filter %s",
416 args->filter_options.filter_spec);
417 packet_buf_flush(&req_buf);
418 state_len = req_buf.len;
419 if (args->deepen) {
421 char *line;
422 const char *arg;
423 struct object_id oid;
424 send_request(args, fd[1], &req_buf);
426 while ((line = packet_read_line(fd[0], NULL))) {
427 if (skip_prefix(line, "shallow ", &arg)) {
428 if (get_oid_hex(arg, &oid))
429 die(_("invalid shallow line: %s"), line);
430 register_shallow(&oid);
431 continue;
432 }
433 if (skip_prefix(line, "unshallow ", &arg)) {
434 if (get_oid_hex(arg, &oid))
435 die(_("invalid unshallow line: %s"), line);
436 if (!lookup_object(oid.hash))
437 die(_("object not found: %s"), line);
438 /* make sure that it is parsed as shallow */
439 if (!parse_object(&oid))
440 die(_("error in object: %s"), line);
441 if (unregister_shallow(&oid))
442 die(_("no shallow found: %s"), line);
443 continue;
444 }
445 die(_("expected shallow/unshallow, got %s"), line);
446 }
447 } else if (!args->stateless_rpc)
448 send_request(args, fd[1], &req_buf);
449 if (!args->stateless_rpc) {
451 /* If we aren't using the stateless-rpc interface
452 * we don't need to retain the headers.
453 */
454 strbuf_setlen(&req_buf, 0);
455 state_len = 0;
456 }
457 flushes = 0;
459 retval = -1;
460 if (args->no_dependents)
461 goto done;
462 while ((oid = get_rev())) {
463 packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
464 print_verbose(args, "have %s", oid_to_hex(oid));
465 in_vain++;
466 if (flush_at <= ++count) {
467 int ack;
468 packet_buf_flush(&req_buf);
470 send_request(args, fd[1], &req_buf);
471 strbuf_setlen(&req_buf, state_len);
472 flushes++;
473 flush_at = next_flush(args->stateless_rpc, count);
474 /*
476 * We keep one window "ahead" of the other side, and
477 * will wait for an ACK only on the next one
478 */
479 if (!args->stateless_rpc && count == INITIAL_FLUSH)
480 continue;
481 consume_shallow_list(args, fd[0]);
483 do {
484 ack = get_ack(fd[0], result_oid);
485 if (ack)
486 print_verbose(args, _("got %s %d %s"), "ack",
487 ack, oid_to_hex(result_oid));
488 switch (ack) {
489 case ACK:
490 flushes = 0;
491 multi_ack = 0;
492 retval = 0;
493 goto done;
494 case ACK_common:
495 case ACK_ready:
496 case ACK_continue: {
497 struct commit *commit =
498 lookup_commit(result_oid);
499 if (!commit)
500 die(_("invalid commit %s"), oid_to_hex(result_oid));
501 if (args->stateless_rpc
502 && ack == ACK_common
503 && !(commit->object.flags & COMMON)) {
504 /* We need to replay the have for this object
505 * on the next RPC request so the peer knows
506 * it is in common with us.
507 */
508 const char *hex = oid_to_hex(result_oid);
509 packet_buf_write(&req_buf, "have %s\n", hex);
510 state_len = req_buf.len;
511 /*
512 * Reset in_vain because an ack
513 * for this commit has not been
514 * seen.
515 */
516 in_vain = 0;
517 } else if (!args->stateless_rpc
518 || ack != ACK_common)
519 in_vain = 0;
520 mark_common(commit, 0, 1);
521 retval = 0;
522 got_continue = 1;
523 if (ack == ACK_ready) {
524 clear_prio_queue(&rev_list);
525 got_ready = 1;
526 }
527 break;
528 }
529 }
530 } while (ack);
531 flushes--;
532 if (got_continue && MAX_IN_VAIN < in_vain) {
533 print_verbose(args, _("giving up"));
534 break; /* give up */
535 }
536 }
537 }
538done:
539 if (!got_ready || !no_done) {
540 packet_buf_write(&req_buf, "done\n");
541 send_request(args, fd[1], &req_buf);
542 }
543 print_verbose(args, _("done"));
544 if (retval != 0) {
545 multi_ack = 0;
546 flushes++;
547 }
548 strbuf_release(&req_buf);
549 if (!got_ready || !no_done)
551 consume_shallow_list(args, fd[0]);
552 while (flushes || multi_ack) {
553 int ack = get_ack(fd[0], result_oid);
554 if (ack) {
555 print_verbose(args, _("got %s (%d) %s"), "ack",
556 ack, oid_to_hex(result_oid));
557 if (ack == ACK)
558 return 0;
559 multi_ack = 1;
560 continue;
561 }
562 flushes--;
563 }
564 /* it is no error to fetch into a completely empty repo */
565 return count ? retval : 0;
566}
567static struct commit_list *complete;
569static int mark_complete(const struct object_id *oid)
571{
572 struct object *o = parse_object(oid);
573 while (o && o->type == OBJ_TAG) {
575 struct tag *t = (struct tag *) o;
576 if (!t->tagged)
577 break; /* broken repository */
578 o->flags |= COMPLETE;
579 o = parse_object(&t->tagged->oid);
580 }
581 if (o && o->type == OBJ_COMMIT) {
582 struct commit *commit = (struct commit *)o;
583 if (!(commit->object.flags & COMPLETE)) {
584 commit->object.flags |= COMPLETE;
585 commit_list_insert(commit, &complete);
586 }
587 }
588 return 0;
589}
590static int mark_complete_oid(const char *refname, const struct object_id *oid,
592 int flag, void *cb_data)
593{
594 return mark_complete(oid);
595}
596static void mark_recent_complete_commits(struct fetch_pack_args *args,
598 timestamp_t cutoff)
599{
600 while (complete && cutoff <= complete->item->date) {
601 print_verbose(args, _("Marking %s as complete"),
602 oid_to_hex(&complete->item->object.oid));
603 pop_most_recent_commit(&complete, COMPLETE);
604 }
605}
606static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
608{
609 for (; refs; refs = refs->next)
610 oidset_insert(oids, &refs->old_oid);
611}
612static int tip_oids_contain(struct oidset *tip_oids,
614 struct ref *unmatched, struct ref *newlist,
615 const struct object_id *id)
616{
617 /*
618 * Note that this only looks at the ref lists the first time it's
619 * called. This works out in filter_refs() because even though it may
620 * add to "newlist" between calls, the additions will always be for
621 * oids that are already in the set.
622 */
623 if (!tip_oids->map.map.tablesize) {
624 add_refs_to_oidset(tip_oids, unmatched);
625 add_refs_to_oidset(tip_oids, newlist);
626 }
627 return oidset_contains(tip_oids, id);
628}
629static void filter_refs(struct fetch_pack_args *args,
631 struct ref **refs,
632 struct ref **sought, int nr_sought)
633{
634 struct ref *newlist = NULL;
635 struct ref **newtail = &newlist;
636 struct ref *unmatched = NULL;
637 struct ref *ref, *next;
638 struct oidset tip_oids = OIDSET_INIT;
639 int i;
640 i = 0;
642 for (ref = *refs; ref; ref = next) {
643 int keep = 0;
644 next = ref->next;
645 if (starts_with(ref->name, "refs/") &&
647 check_refname_format(ref->name, 0))
648 ; /* trash */
649 else {
650 while (i < nr_sought) {
651 int cmp = strcmp(ref->name, sought[i]->name);
652 if (cmp < 0)
653 break; /* definitely do not have it */
654 else if (cmp == 0) {
655 keep = 1; /* definitely have it */
656 sought[i]->match_status = REF_MATCHED;
657 }
658 i++;
659 }
660 }
661 if (!keep && args->fetch_all &&
663 (!args->deepen || !starts_with(ref->name, "refs/tags/")))
664 keep = 1;
665 if (keep) {
667 *newtail = ref;
668 ref->next = NULL;
669 newtail = &ref->next;
670 } else {
671 ref->next = unmatched;
672 unmatched = ref;
673 }
674 }
675 /* Append unmatched requests to the list */
677 for (i = 0; i < nr_sought; i++) {
678 struct object_id oid;
679 const char *p;
680 ref = sought[i];
682 if (ref->match_status != REF_NOT_MATCHED)
683 continue;
684 if (parse_oid_hex(ref->name, &oid, &p) ||
685 *p != '\0' ||
686 oidcmp(&oid, &ref->old_oid))
687 continue;
688 if ((allow_unadvertised_object_request &
690 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)) ||
691 tip_oids_contain(&tip_oids, unmatched, newlist,
692 &ref->old_oid)) {
693 ref->match_status = REF_MATCHED;
694 *newtail = copy_ref(ref);
695 newtail = &(*newtail)->next;
696 } else {
697 ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
698 }
699 }
700 oidset_clear(&tip_oids);
702 for (ref = unmatched; ref; ref = next) {
703 next = ref->next;
704 free(ref);
705 }
706 *refs = newlist;
708}
709static void mark_alternate_complete(struct object *obj)
711{
712 mark_complete(&obj->oid);
713}
714struct loose_object_iter {
716 struct oidset *loose_object_set;
717 struct ref *refs;
718};
719/*
721 * If the number of refs is not larger than the number of loose objects,
722 * this function stops inserting.
723 */
724static int add_loose_objects_to_set(const struct object_id *oid,
725 const char *path,
726 void *data)
727{
728 struct loose_object_iter *iter = data;
729 oidset_insert(iter->loose_object_set, oid);
730 if (iter->refs == NULL)
731 return 1;
732 iter->refs = iter->refs->next;
734 return 0;
735}
736static int everything_local(struct fetch_pack_args *args,
738 struct ref **refs,
739 struct ref **sought, int nr_sought)
740{
741 struct ref *ref;
742 int retval;
743 int old_save_commit_buffer = save_commit_buffer;
744 timestamp_t cutoff = 0;
745 struct oidset loose_oid_set = OIDSET_INIT;
746 int use_oidset = 0;
747 struct loose_object_iter iter = {&loose_oid_set, *refs};
748 /* Enumerate all loose objects or know refs are not so many. */
750 use_oidset = !for_each_loose_object(add_loose_objects_to_set,
751 &iter, 0);
752 save_commit_buffer = 0;
754 for (ref = *refs; ref; ref = ref->next) {
756 struct object *o;
757 unsigned int flags = OBJECT_INFO_QUICK;
758 if (use_oidset &&
760 !oidset_contains(&loose_oid_set, &ref->old_oid)) {
761 /*
762 * I know this does not exist in the loose form,
763 * so check if it exists in a non-loose form.
764 */
765 flags |= OBJECT_INFO_IGNORE_LOOSE;
766 }
767 if (!has_object_file_with_flags(&ref->old_oid, flags))
769 continue;
770 o = parse_object(&ref->old_oid);
771 if (!o)
772 continue;
773 /* We already have it -- which may mean that we were
775 * in sync with the other side at some time after
776 * that (it is OK if we guess wrong here).
777 */
778 if (o->type == OBJ_COMMIT) {
779 struct commit *commit = (struct commit *)o;
780 if (!cutoff || cutoff < commit->date)
781 cutoff = commit->date;
782 }
783 }
784 oidset_clear(&loose_oid_set);
786 if (!args->no_dependents) {
788 if (!args->deepen) {
789 for_each_ref(mark_complete_oid, NULL);
790 for_each_cached_alternate(mark_alternate_complete);
791 commit_list_sort_by_date(&complete);
792 if (cutoff)
793 mark_recent_complete_commits(args, cutoff);
794 }
795 /*
797 * Mark all complete remote refs as common refs.
798 * Don't mark them common yet; the server has to be told so first.
799 */
800 for (ref = *refs; ref; ref = ref->next) {
801 struct object *o = deref_tag(lookup_object(ref->old_oid.hash),
802 NULL, 0);
803 if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
805 continue;
806 if (!(o->flags & SEEN)) {
808 rev_list_push((struct commit *)o, COMMON_REF | SEEN);
809 mark_common((struct commit *)o, 1, 1);
811 }
812 }
813 }
814 filter_refs(args, refs, sought, nr_sought);
816 for (retval = 1, ref = *refs; ref ; ref = ref->next) {
818 const struct object_id *remote = &ref->old_oid;
819 struct object *o;
820 o = lookup_object(remote->hash);
822 if (!o || !(o->flags & COMPLETE)) {
823 retval = 0;
824 print_verbose(args, "want %s (%s)", oid_to_hex(remote),
825 ref->name);
826 continue;
827 }
828 print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
829 ref->name);
830 }
831 save_commit_buffer = old_save_commit_buffer;
833 return retval;
835}
836static int sideband_demux(int in, int out, void *data)
838{
839 int *xd = data;
840 int ret;
841 ret = recv_sideband("fetch-pack", xd[0], out);
843 close(out);
844 return ret;
845}
846static int get_pack(struct fetch_pack_args *args,
848 int xd[2], char **pack_lockfile)
849{
850 struct async demux;
851 int do_keep = args->keep_pack;
852 const char *cmd_name;
853 struct pack_header header;
854 int pass_header = 0;
855 struct child_process cmd = CHILD_PROCESS_INIT;
856 int ret;
857 memset(&demux, 0, sizeof(demux));
859 if (use_sideband) {
860 /* xd[] is talking with upload-pack; subprocess reads from
861 * xd[0], spits out band#2 to stderr, and feeds us band#1
862 * through demux->out.
863 */
864 demux.proc = sideband_demux;
865 demux.data = xd;
866 demux.out = -1;
867 demux.isolate_sigpipe = 1;
868 if (start_async(&demux))
869 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
870 }
871 else
872 demux.out = xd[0];
873 if (!args->keep_pack && unpack_limit) {
875 if (read_pack_header(demux.out, &header))
877 die(_("protocol error: bad pack header"));
878 pass_header = 1;
879 if (ntohl(header.hdr_entries) < unpack_limit)
880 do_keep = 0;
881 else
882 do_keep = 1;
883 }
884 if (alternate_shallow_file) {
886 argv_array_push(&cmd.args, "--shallow-file");
887 argv_array_push(&cmd.args, alternate_shallow_file);
888 }
889 if (do_keep || args->from_promisor) {
891 if (pack_lockfile)
892 cmd.out = -1;
893 cmd_name = "index-pack";
894 argv_array_push(&cmd.args, cmd_name);
895 argv_array_push(&cmd.args, "--stdin");
896 if (!args->quiet && !args->no_progress)
897 argv_array_push(&cmd.args, "-v");
898 if (args->use_thin_pack)
899 argv_array_push(&cmd.args, "--fix-thin");
900 if (do_keep && (args->lock_pack || unpack_limit)) {
901 char hostname[HOST_NAME_MAX + 1];
902 if (xgethostname(hostname, sizeof(hostname)))
903 xsnprintf(hostname, sizeof(hostname), "localhost");
904 argv_array_pushf(&cmd.args,
905 "--keep=fetch-pack %"PRIuMAX " on %s",
906 (uintmax_t)getpid(), hostname);
907 }
908 if (args->check_self_contained_and_connected)
909 argv_array_push(&cmd.args, "--check-self-contained-and-connected");
910 if (args->from_promisor)
911 argv_array_push(&cmd.args, "--promisor");
912 }
913 else {
914 cmd_name = "unpack-objects";
915 argv_array_push(&cmd.args, cmd_name);
916 if (args->quiet || args->no_progress)
917 argv_array_push(&cmd.args, "-q");
918 args->check_self_contained_and_connected = 0;
919 }
920 if (pass_header)
922 argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
923 ntohl(header.hdr_version),
924 ntohl(header.hdr_entries));
925 if (fetch_fsck_objects >= 0
926 ? fetch_fsck_objects
927 : transfer_fsck_objects >= 0
928 ? transfer_fsck_objects
929 : 0) {
930 if (args->from_promisor)
931 /*
932 * We cannot use --strict in index-pack because it
933 * checks both broken objects and links, but we only
934 * want to check for broken objects.
935 */
936 argv_array_push(&cmd.args, "--fsck-objects");
937 else
938 argv_array_push(&cmd.args, "--strict");
939 }
940 cmd.in = demux.out;
942 cmd.git_cmd = 1;
943 if (start_command(&cmd))
944 die(_("fetch-pack: unable to fork off %s"), cmd_name);
945 if (do_keep && pack_lockfile) {
946 *pack_lockfile = index_pack_lockfile(cmd.out);
947 close(cmd.out);
948 }
949 if (!use_sideband)
951 /* Closed by start_command() */
952 xd[0] = -1;
953 ret = finish_command(&cmd);
955 if (!ret || (args->check_self_contained_and_connected && ret == 1))
956 args->self_contained_and_connected =
957 args->check_self_contained_and_connected &&
958 ret == 0;
959 else
960 die(_("%s failed"), cmd_name);
961 if (use_sideband && finish_async(&demux))
962 die(_("error in sideband demultiplexer"));
963 return 0;
964}
965static int cmp_ref_by_name(const void *a_, const void *b_)
967{
968 const struct ref *a = *((const struct ref **)a_);
969 const struct ref *b = *((const struct ref **)b_);
970 return strcmp(a->name, b->name);
971}
972static struct ref *do_fetch_pack(struct fetch_pack_args *args,
974 int fd[2],
975 const struct ref *orig_ref,
976 struct ref **sought, int nr_sought,
977 struct shallow_info *si,
978 char **pack_lockfile)
979{
980 struct ref *ref = copy_ref_list(orig_ref);
981 struct object_id oid;
982 const char *agent_feature;
983 int agent_len;
984 sort_ref_list(&ref, ref_compare_name);
986 QSORT(sought, nr_sought, cmp_ref_by_name);
987 if ((args->depth > 0 || is_repository_shallow()) && !server_supports("shallow"))
989 die(_("Server does not support shallow clients"));
990 if (args->depth > 0 || args->deepen_since || args->deepen_not)
991 args->deepen = 1;
992 if (server_supports("multi_ack_detailed")) {
993 print_verbose(args, _("Server supports multi_ack_detailed"));
994 multi_ack = 2;
995 if (server_supports("no-done")) {
996 print_verbose(args, _("Server supports no-done"));
997 if (args->stateless_rpc)
998 no_done = 1;
999 }
1000 }
1001 else if (server_supports("multi_ack")) {
1002 print_verbose(args, _("Server supports multi_ack"));
1003 multi_ack = 1;
1004 }
1005 if (server_supports("side-band-64k")) {
1006 print_verbose(args, _("Server supports side-band-64k"));
1007 use_sideband = 2;
1008 }
1009 else if (server_supports("side-band")) {
1010 print_verbose(args, _("Server supports side-band"));
1011 use_sideband = 1;
1012 }
1013 if (server_supports("allow-tip-sha1-in-want")) {
1014 print_verbose(args, _("Server supports allow-tip-sha1-in-want"));
1015 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1016 }
1017 if (server_supports("allow-reachable-sha1-in-want")) {
1018 print_verbose(args, _("Server supports allow-reachable-sha1-in-want"));
1019 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1020 }
1021 if (!server_supports("thin-pack"))
1022 args->use_thin_pack = 0;
1023 if (!server_supports("no-progress"))
1024 args->no_progress = 0;
1025 if (!server_supports("include-tag"))
1026 args->include_tag = 0;
1027 if (server_supports("ofs-delta"))
1028 print_verbose(args, _("Server supports ofs-delta"));
1029 else
1030 prefer_ofs_delta = 0;
1031 if (server_supports("filter")) {
1033 server_supports_filtering = 1;
1034 print_verbose(args, _("Server supports filter"));
1035 } else if (args->filter_options.choice) {
1036 warning("filtering not recognized by server, ignoring");
1037 }
1038 if ((agent_feature = server_feature_value("agent", &agent_len))) {
1040 agent_supported = 1;
1041 if (agent_len)
1042 print_verbose(args, _("Server version is %.*s"),
1043 agent_len, agent_feature);
1044 }
1045 if (server_supports("deepen-since"))
1046 deepen_since_ok = 1;
1047 else if (args->deepen_since)
1048 die(_("Server does not support --shallow-since"));
1049 if (server_supports("deepen-not"))
1050 deepen_not_ok = 1;
1051 else if (args->deepen_not)
1052 die(_("Server does not support --shallow-exclude"));
1053 if (!server_supports("deepen-relative") && args->deepen_relative)
1054 die(_("Server does not support --deepen"));
1055 if (everything_local(args, &ref, sought, nr_sought)) {
1057 packet_flush(fd[1]);
1058 goto all_done;
1059 }
1060 if (find_common(args, fd, &oid, ref) < 0)
1061 if (!args->keep_pack)
1062 /* When cloning, it is not unusual to have
1063 * no common commit.
1064 */
1065 warning(_("no common commits"));
1066 if (args->stateless_rpc)
1068 packet_flush(fd[1]);
1069 if (args->deepen)
1070 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1071 NULL);
1072 else if (si->nr_ours || si->nr_theirs)
1073 alternate_shallow_file = setup_temporary_shallow(si->shallow);
1074 else
1075 alternate_shallow_file = NULL;
1076 if (get_pack(args, fd, pack_lockfile))
1077 die(_("git fetch-pack: fetch failed."));
1078 all_done:
1080 return ref;
1081}
1082static void add_shallow_requests(struct strbuf *req_buf,
1084 const struct fetch_pack_args *args)
1085{
1086 if (is_repository_shallow())
1087 write_shallow_commits(req_buf, 1, NULL);
1088 if (args->depth > 0)
1089 packet_buf_write(req_buf, "deepen %d", args->depth);
1090 if (args->deepen_since) {
1091 timestamp_t max_age = approxidate(args->deepen_since);
1092 packet_buf_write(req_buf, "deepen-since %"PRItime, max_age);
1093 }
1094 if (args->deepen_not) {
1095 int i;
1096 for (i = 0; i < args->deepen_not->nr; i++) {
1097 struct string_list_item *s = args->deepen_not->items + i;
1098 packet_buf_write(req_buf, "deepen-not %s", s->string);
1099 }
1100 }
1101}
1102static void add_wants(const struct ref *wants, struct strbuf *req_buf)
1104{
1105 int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0);
1106 for ( ; wants ; wants = wants->next) {
1108 const struct object_id *remote = &wants->old_oid;
1109 struct object *o;
1110 /*
1112 * If that object is complete (i.e. it is an ancestor of a
1113 * local ref), we tell them we have it but do not have to
1114 * tell them about its ancestors, which they already know
1115 * about.
1116 *
1117 * We use lookup_object here because we are only
1118 * interested in the case we *know* the object is
1119 * reachable and we have already scanned it.
1120 */
1121 if (((o = lookup_object(remote->hash)) != NULL) &&
1122 (o->flags & COMPLETE)) {
1123 continue;
1124 }
1125 if (!use_ref_in_want || wants->exact_oid)
1127 packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote));
1128 else
1129 packet_buf_write(req_buf, "want-ref %s\n", wants->name);
1130 }
1131}
1132static void add_common(struct strbuf *req_buf, struct oidset *common)
1134{
1135 struct oidset_iter iter;
1136 const struct object_id *oid;
1137 oidset_iter_init(common, &iter);
1138 while ((oid = oidset_iter_next(&iter))) {
1140 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1141 }
1142}
1143static int add_haves(struct strbuf *req_buf, int *haves_to_send, int *in_vain)
1145{
1146 int ret = 0;
1147 int haves_added = 0;
1148 const struct object_id *oid;
1149 while ((oid = get_rev())) {
1151 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1152 if (++haves_added >= *haves_to_send)
1153 break;
1154 }
1155 *in_vain += haves_added;
1157 if (!haves_added || *in_vain >= MAX_IN_VAIN) {
1158 /* Send Done */
1159 packet_buf_write(req_buf, "done\n");
1160 ret = 1;
1161 }
1162 /* Increase haves to send on next round */
1164 *haves_to_send = next_flush(1, *haves_to_send);
1165 return ret;
1167}
1168static int send_fetch_request(int fd_out, const struct fetch_pack_args *args,
1170 const struct ref *wants, struct oidset *common,
1171 int *haves_to_send, int *in_vain)
1172{
1173 int ret = 0;
1174 struct strbuf req_buf = STRBUF_INIT;
1175 if (server_supports_v2("fetch", 1))
1177 packet_buf_write(&req_buf, "command=fetch");
1178 if (server_supports_v2("agent", 0))
1179 packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
1180 if (args->server_options && args->server_options->nr &&
1181 server_supports_v2("server-option", 1)) {
1182 int i;
1183 for (i = 0; i < args->server_options->nr; i++)
1184 packet_write_fmt(fd_out, "server-option=%s",
1185 args->server_options->items[i].string);
1186 }
1187 packet_buf_delim(&req_buf);
1189 if (args->use_thin_pack)
1190 packet_buf_write(&req_buf, "thin-pack");
1191 if (args->no_progress)
1192 packet_buf_write(&req_buf, "no-progress");
1193 if (args->include_tag)
1194 packet_buf_write(&req_buf, "include-tag");
1195 if (prefer_ofs_delta)
1196 packet_buf_write(&req_buf, "ofs-delta");
1197 /* Add shallow-info and deepen request */
1199 if (server_supports_feature("fetch", "shallow", 0))
1200 add_shallow_requests(&req_buf, args);
1201 else if (is_repository_shallow() || args->deepen)
1202 die(_("Server does not support shallow requests"));
1203 /* Add filter */
1205 if (server_supports_feature("fetch", "filter", 0) &&
1206 args->filter_options.choice) {
1207 print_verbose(args, _("Server supports filter"));
1208 packet_buf_write(&req_buf, "filter %s",
1209 args->filter_options.filter_spec);
1210 } else if (args->filter_options.choice) {
1211 warning("filtering not recognized by server, ignoring");
1212 }
1213 /* add wants */
1215 add_wants(wants, &req_buf);
1216 if (args->no_dependents) {
1218 packet_buf_write(&req_buf, "done");
1219 ret = 1;
1220 } else {
1221 /* Add all of the common commits we've found in previous rounds */
1222 add_common(&req_buf, common);
1223 /* Add initial haves */
1225 ret = add_haves(&req_buf, haves_to_send, in_vain);
1226 }
1227 /* Send request */
1229 packet_buf_flush(&req_buf);
1230 write_or_die(fd_out, req_buf.buf, req_buf.len);
1231 strbuf_release(&req_buf);
1233 return ret;
1234}
1235/*
1237 * Processes a section header in a server's response and checks if it matches
1238 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1239 * not consumed); if 0, the line will be consumed and the function will die if
1240 * the section header doesn't match what was expected.
1241 */
1242static int process_section_header(struct packet_reader *reader,
1243 const char *section, int peek)
1244{
1245 int ret;
1246 if (packet_reader_peek(reader) != PACKET_READ_NORMAL)
1248 die("error reading section header '%s'", section);
1249 ret = !strcmp(reader->line, section);
1251 if (!peek) {
1253 if (!ret)
1254 die("expected '%s', received '%s'",
1255 section, reader->line);
1256 packet_reader_read(reader);
1257 }
1258 return ret;
1260}
1261static int process_acks(struct packet_reader *reader, struct oidset *common)
1263{
1264 /* received */
1265 int received_ready = 0;
1266 int received_ack = 0;
1267 process_section_header(reader, "acknowledgments", 0);
1269 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1270 const char *arg;
1271 if (!strcmp(reader->line, "NAK"))
1273 continue;
1274 if (skip_prefix(reader->line, "ACK ", &arg)) {
1276 struct object_id oid;
1277 if (!get_oid_hex(arg, &oid)) {
1278 struct commit *commit;
1279 oidset_insert(common, &oid);
1280 commit = lookup_commit(&oid);
1281 mark_common(commit, 0, 1);
1282 }
1283 continue;
1284 }
1285 if (!strcmp(reader->line, "ready")) {
1287 clear_prio_queue(&rev_list);
1288 received_ready = 1;
1289 continue;
1290 }
1291 die("unexpected acknowledgment line: '%s'", reader->line);
1293 }
1294 if (reader->status != PACKET_READ_FLUSH &&
1296 reader->status != PACKET_READ_DELIM)
1297 die("error processing acks: %d", reader->status);
1298 /* return 0 if no common, 1 if there are common, or 2 if ready */
1300 return received_ready ? 2 : (received_ack ? 1 : 0);
1301}
1302static void receive_shallow_info(struct fetch_pack_args *args,
1304 struct packet_reader *reader)
1305{
1306 process_section_header(reader, "shallow-info", 0);
1307 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1308 const char *arg;
1309 struct object_id oid;
1310 if (skip_prefix(reader->line, "shallow ", &arg)) {
1312 if (get_oid_hex(arg, &oid))
1313 die(_("invalid shallow line: %s"), reader->line);
1314 register_shallow(&oid);
1315 continue;
1316 }
1317 if (skip_prefix(reader->line, "unshallow ", &arg)) {
1318 if (get_oid_hex(arg, &oid))
1319 die(_("invalid unshallow line: %s"), reader->line);
1320 if (!lookup_object(oid.hash))
1321 die(_("object not found: %s"), reader->line);
1322 /* make sure that it is parsed as shallow */
1323 if (!parse_object(&oid))
1324 die(_("error in object: %s"), reader->line);
1325 if (unregister_shallow(&oid))
1326 die(_("no shallow found: %s"), reader->line);
1327 continue;
1328 }
1329 die(_("expected shallow/unshallow, got %s"), reader->line);
1330 }
1331 if (reader->status != PACKET_READ_FLUSH &&
1333 reader->status != PACKET_READ_DELIM)
1334 die("error processing shallow info: %d", reader->status);
1335 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, NULL);
1337 args->deepen = 1;
1338}
1339static void receive_wanted_refs(struct packet_reader *reader, struct ref *refs)
1341{
1342 process_section_header(reader, "wanted-refs", 0);
1343 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1344 struct object_id oid;
1345 const char *end;
1346 struct ref *r = NULL;
1347 if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ')
1349 die("expected wanted-ref, got '%s'", reader->line);
1350 for (r = refs; r; r = r->next) {
1352 if (!strcmp(end, r->name)) {
1353 oidcpy(&r->old_oid, &oid);
1354 break;
1355 }
1356 }
1357 if (!r)
1359 die("unexpected wanted-ref: '%s'", reader->line);
1360 }
1361 if (reader->status != PACKET_READ_DELIM)
1363 die("error processing wanted refs: %d", reader->status);
1364}
1365enum fetch_state {
1367 FETCH_CHECK_LOCAL = 0,
1368 FETCH_SEND_REQUEST,
1369 FETCH_PROCESS_ACKS,
1370 FETCH_GET_PACK,
1371 FETCH_DONE,
1372};
1373static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
1375 int fd[2],
1376 const struct ref *orig_ref,
1377 struct ref **sought, int nr_sought,
1378 char **pack_lockfile)
1379{
1380 struct ref *ref = copy_ref_list(orig_ref);
1381 enum fetch_state state = FETCH_CHECK_LOCAL;
1382 struct oidset common = OIDSET_INIT;
1383 struct packet_reader reader;
1384 int in_vain = 0;
1385 int haves_to_send = INITIAL_FLUSH;
1386 packet_reader_init(&reader, fd[0], NULL, 0,
1387 PACKET_READ_CHOMP_NEWLINE);
1388 while (state != FETCH_DONE) {
1390 switch (state) {
1391 case FETCH_CHECK_LOCAL:
1392 sort_ref_list(&ref, ref_compare_name);
1393 QSORT(sought, nr_sought, cmp_ref_by_name);
1394 /* v2 supports these by default */
1396 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1397 use_sideband = 2;
1398 if (args->depth > 0 || args->deepen_since || args->deepen_not)
1399 args->deepen = 1;
1400 if (marked)
1402 for_each_ref(clear_marks, NULL);
1403 marked = 1;
1404 for_each_ref(rev_list_insert_ref_oid, NULL);
1406 for_each_cached_alternate(insert_one_alternate_object);
1407 /* Filter 'ref' by 'sought' and those that aren't local */
1409 if (everything_local(args, &ref, sought, nr_sought))
1410 state = FETCH_DONE;
1411 else
1412 state = FETCH_SEND_REQUEST;
1413 break;
1414 case FETCH_SEND_REQUEST:
1415 if (send_fetch_request(fd[1], args, ref, &common,
1416 &haves_to_send, &in_vain))
1417 state = FETCH_GET_PACK;
1418 else
1419 state = FETCH_PROCESS_ACKS;
1420 break;
1421 case FETCH_PROCESS_ACKS:
1422 /* Process ACKs/NAKs */
1423 switch (process_acks(&reader, &common)) {
1424 case 2:
1425 state = FETCH_GET_PACK;
1426 break;
1427 case 1:
1428 in_vain = 0;
1429 /* fallthrough */
1430 default:
1431 state = FETCH_SEND_REQUEST;
1432 break;
1433 }
1434 break;
1435 case FETCH_GET_PACK:
1436 /* Check for shallow-info section */
1437 if (process_section_header(&reader, "shallow-info", 1))
1438 receive_shallow_info(args, &reader);
1439 if (process_section_header(&reader, "wanted-refs", 1))
1441 receive_wanted_refs(&reader, ref);
1442 /* get the pack */
1444 process_section_header(&reader, "packfile", 0);
1445 if (get_pack(args, fd, pack_lockfile))
1446 die(_("git fetch-pack: fetch failed."));
1447 state = FETCH_DONE;
1449 break;
1450 case FETCH_DONE:
1451 continue;
1452 }
1453 }
1454 oidset_clear(&common);
1456 return ref;
1457}
1458static void fetch_pack_config(void)
1460{
1461 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
1462 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
1463 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
1464 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
1465 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
1466 git_config(git_default_config, NULL);
1468}
1469static void fetch_pack_setup(void)
1471{
1472 static int did_setup;
1473 if (did_setup)
1474 return;
1475 fetch_pack_config();
1476 if (0 <= transfer_unpack_limit)
1477 unpack_limit = transfer_unpack_limit;
1478 else if (0 <= fetch_unpack_limit)
1479 unpack_limit = fetch_unpack_limit;
1480 did_setup = 1;
1481}
1482static int remove_duplicates_in_refs(struct ref **ref, int nr)
1484{
1485 struct string_list names = STRING_LIST_INIT_NODUP;
1486 int src, dst;
1487 for (src = dst = 0; src < nr; src++) {
1489 struct string_list_item *item;
1490 item = string_list_insert(&names, ref[src]->name);
1491 if (item->util)
1492 continue; /* already have it */
1493 item->util = ref[src];
1494 if (src != dst)
1495 ref[dst] = ref[src];
1496 dst++;
1497 }
1498 for (src = dst; src < nr; src++)
1499 ref[src] = NULL;
1500 string_list_clear(&names, 0);
1501 return dst;
1502}
1503static void update_shallow(struct fetch_pack_args *args,
1505 struct ref *refs,
1506 struct shallow_info *si)
1507{
1508 struct oid_array ref = OID_ARRAY_INIT;
1509 int *status;
1510 int i;
1511 struct ref *r;
1512 if (args->deepen && alternate_shallow_file) {
1514 if (*alternate_shallow_file == '\0') { /* --unshallow */
1515 unlink_or_warn(git_path_shallow());
1516 rollback_lock_file(&shallow_lock);
1517 } else
1518 commit_lock_file(&shallow_lock);
1519 return;
1520 }
1521 if (!si->shallow || !si->shallow->nr)
1523 return;
1524 if (args->cloning) {
1526 /*
1527 * remote is shallow, but this is a clone, there are
1528 * no objects in repo to worry about. Accept any
1529 * shallow points that exist in the pack (iow in repo
1530 * after get_pack() and reprepare_packed_git())
1531 */
1532 struct oid_array extra = OID_ARRAY_INIT;
1533 struct object_id *oid = si->shallow->oid;
1534 for (i = 0; i < si->shallow->nr; i++)
1535 if (has_object_file(&oid[i]))
1536 oid_array_append(&extra, &oid[i]);
1537 if (extra.nr) {
1538 setup_alternate_shallow(&shallow_lock,
1539 &alternate_shallow_file,
1540 &extra);
1541 commit_lock_file(&shallow_lock);
1542 }
1543 oid_array_clear(&extra);
1544 return;
1545 }
1546 if (!si->nr_ours && !si->nr_theirs)
1548 return;
1549 remove_nonexistent_theirs_shallow(si);
1551 if (!si->nr_ours && !si->nr_theirs)
1552 return;
1553 for (r = refs; r; r = r->next)
1554 oid_array_append(&ref, &r->old_oid);
1555 si->ref = &ref;
1556 if (args->update_shallow) {
1558 /*
1559 * remote is also shallow, .git/shallow may be updated
1560 * so all refs can be accepted. Make sure we only add
1561 * shallow roots that are actually reachable from new
1562 * refs.
1563 */
1564 struct oid_array extra = OID_ARRAY_INIT;
1565 struct object_id *oid = si->shallow->oid;
1566 assign_shallow_commits_to_refs(si, NULL, NULL);
1567 if (!si->nr_ours && !si->nr_theirs) {
1568 oid_array_clear(&ref);
1569 return;
1570 }
1571 for (i = 0; i < si->nr_ours; i++)
1572 oid_array_append(&extra, &oid[si->ours[i]]);
1573 for (i = 0; i < si->nr_theirs; i++)
1574 oid_array_append(&extra, &oid[si->theirs[i]]);
1575 setup_alternate_shallow(&shallow_lock,
1576 &alternate_shallow_file,
1577 &extra);
1578 commit_lock_file(&shallow_lock);
1579 oid_array_clear(&extra);
1580 oid_array_clear(&ref);
1581 return;
1582 }
1583 /*
1585 * remote is also shallow, check what ref is safe to update
1586 * without updating .git/shallow
1587 */
1588 status = xcalloc(ref.nr, sizeof(*status));
1589 assign_shallow_commits_to_refs(si, NULL, status);
1590 if (si->nr_ours || si->nr_theirs) {
1591 for (r = refs, i = 0; r; r = r->next, i++)
1592 if (status[i])
1593 r->status = REF_STATUS_REJECT_SHALLOW;
1594 }
1595 free(status);
1596 oid_array_clear(&ref);
1597}
1598struct ref *fetch_pack(struct fetch_pack_args *args,
1600 int fd[], struct child_process *conn,
1601 const struct ref *ref,
1602 const char *dest,
1603 struct ref **sought, int nr_sought,
1604 struct oid_array *shallow,
1605 char **pack_lockfile,
1606 enum protocol_version version)
1607{
1608 struct ref *ref_cpy;
1609 struct shallow_info si;
1610 fetch_pack_setup();
1612 if (nr_sought)
1613 nr_sought = remove_duplicates_in_refs(sought, nr_sought);
1614 if (!ref) {
1616 packet_flush(fd[1]);
1617 die(_("no matching remote head"));
1618 }
1619 prepare_shallow_info(&si, shallow);
1620 if (version == protocol_v2)
1621 ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
1622 pack_lockfile);
1623 else
1624 ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
1625 &si, pack_lockfile);
1626 reprepare_packed_git(the_repository);
1627 update_shallow(args, ref_cpy, &si);
1628 clear_shallow_info(&si);
1629 return ref_cpy;
1630}
1631int report_unmatched_refs(struct ref **sought, int nr_sought)
1633{
1634 int i, ret = 0;
1635 for (i = 0; i < nr_sought; i++) {
1637 if (!sought[i])
1638 continue;
1639 switch (sought[i]->match_status) {
1640 case REF_MATCHED:
1641 continue;
1642 case REF_NOT_MATCHED:
1643 error(_("no such remote ref %s"), sought[i]->name);
1644 break;
1645 case REF_UNADVERTISED_NOT_ALLOWED:
1646 error(_("Server does not allow request for unadvertised object %s"),
1647 sought[i]->name);
1648 break;
1649 }
1650 ret = 1;
1651 }
1652 return ret;
1653}