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"
22#include "object-store.h"
23static int transfer_unpack_limit = -1;
25static int fetch_unpack_limit = -1;
26static int unpack_limit = 100;
27static int prefer_ofs_delta = 1;
28static int no_done;
29static int deepen_since_ok;
30static int deepen_not_ok;
31static int fetch_fsck_objects = -1;
32static int transfer_fsck_objects = -1;
33static int agent_supported;
34static int server_supports_filtering;
35static struct lock_file shallow_lock;
36static const char *alternate_shallow_file;
37/* Remember to update object flag allocation in object.h */
39#define COMPLETE (1U << 0)
40#define COMMON (1U << 1)
41#define COMMON_REF (1U << 2)
42#define SEEN (1U << 3)
43#define POPPED (1U << 4)
44#define ALTERNATE (1U << 5)
45static int marked;
47/*
49 * After sending this many "have"s if we do not get any new ACK , we
50 * give up traversing our history.
51 */
52#define MAX_IN_VAIN 256
53static struct prio_queue rev_list = { compare_commits_by_commit_date };
55static int non_common_revs, multi_ack, use_sideband;
56/* Allow specifying sha1 if it is a ref tip. */
57#define ALLOW_TIP_SHA1 01
58/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
59#define ALLOW_REACHABLE_SHA1 02
60static unsigned int allow_unadvertised_object_request;
61__attribute__((format (printf, 2, 3)))
63static inline void print_verbose(const struct fetch_pack_args *args,
64 const char *fmt, ...)
65{
66 va_list params;
67 if (!args->verbose)
69 return;
70 va_start(params, fmt);
72 vfprintf(stderr, fmt, params);
73 va_end(params);
74 fputc('\n', stderr);
75}
76struct alternate_object_cache {
78 struct object **items;
79 size_t nr, alloc;
80};
81static void cache_one_alternate(const char *refname,
83 const struct object_id *oid,
84 void *vcache)
85{
86 struct alternate_object_cache *cache = vcache;
87 struct object *obj = parse_object(oid);
88 if (!obj || (obj->flags & ALTERNATE))
90 return;
91 obj->flags |= ALTERNATE;
93 ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
94 cache->items[cache->nr++] = obj;
95}
96static void for_each_cached_alternate(void (*cb)(struct object *))
98{
99 static int initialized;
100 static struct alternate_object_cache cache;
101 size_t i;
102 if (!initialized) {
104 for_each_alternate_ref(cache_one_alternate, &cache);
105 initialized = 1;
106 }
107 for (i = 0; i < cache.nr; i++)
109 cb(cache.items[i]);
110}
111static void rev_list_push(struct commit *commit, int mark)
113{
114 if (!(commit->object.flags & mark)) {
115 commit->object.flags |= mark;
116 if (parse_commit(commit))
118 return;
119 prio_queue_put(&rev_list, commit);
121 if (!(commit->object.flags & COMMON))
123 non_common_revs++;
124 }
125}
126static int rev_list_insert_ref(const char *refname, const struct object_id *oid)
128{
129 struct object *o = deref_tag(parse_object(oid), refname, 0);
130 if (o && o->type == OBJ_COMMIT)
132 rev_list_push((struct commit *)o, SEEN);
133 return 0;
135}
136static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
138 int flag, void *cb_data)
139{
140 return rev_list_insert_ref(refname, oid);
141}
142static int clear_marks(const char *refname, const struct object_id *oid,
144 int flag, void *cb_data)
145{
146 struct object *o = deref_tag(parse_object(oid), refname, 0);
147 if (o && o->type == OBJ_COMMIT)
149 clear_commit_marks((struct commit *)o,
150 COMMON | COMMON_REF | SEEN | POPPED);
151 return 0;
152}
153/*
155 This function marks a rev and its ancestors as common.
156 In some cases, it is desirable to mark only the ancestors (for example
157 when only the server does not yet know that they are common).
158*/
159static void mark_common(struct commit *commit,
161 int ancestors_only, int dont_parse)
162{
163 if (commit != NULL && !(commit->object.flags & COMMON)) {
164 struct object *o = (struct object *)commit;
165 if (!ancestors_only)
167 o->flags |= COMMON;
168 if (!(o->flags & SEEN))
170 rev_list_push(commit, SEEN);
171 else {
172 struct commit_list *parents;
173 if (!ancestors_only && !(o->flags & POPPED))
175 non_common_revs--;
176 if (!o->parsed && !dont_parse)
177 if (parse_commit(commit))
178 return;
179 for (parents = commit->parents;
181 parents;
182 parents = parents->next)
183 mark_common(parents->item, 0, dont_parse);
184 }
185 }
186}
187/*
189 Get the next rev to send, ignoring the common.
190*/
191static const struct object_id *get_rev(void)
193{
194 struct commit *commit = NULL;
195 while (commit == NULL) {
197 unsigned int mark;
198 struct commit_list *parents;
199 if (rev_list.nr == 0 || non_common_revs == 0)
201 return NULL;
202 commit = prio_queue_get(&rev_list);
204 parse_commit(commit);
205 parents = commit->parents;
206 commit->object.flags |= POPPED;
208 if (!(commit->object.flags & COMMON))
209 non_common_revs--;
210 if (commit->object.flags & COMMON) {
212 /* do not send "have", and ignore ancestors */
213 commit = NULL;
214 mark = COMMON | SEEN;
215 } else if (commit->object.flags & COMMON_REF)
216 /* send "have", and ignore ancestors */
217 mark = COMMON | SEEN;
218 else
219 /* send "have", also for its ancestors */
220 mark = SEEN;
221 while (parents) {
223 if (!(parents->item->object.flags & SEEN))
224 rev_list_push(parents->item, mark);
225 if (mark & COMMON)
226 mark_common(parents->item, 1, 0);
227 parents = parents->next;
228 }
229 }
230 return &commit->object.oid;
232}
233enum ack_type {
235 NAK = 0,
236 ACK,
237 ACK_continue,
238 ACK_common,
239 ACK_ready
240};
241static void consume_shallow_list(struct fetch_pack_args *args, int fd)
243{
244 if (args->stateless_rpc && args->deepen) {
245 /* If we sent a depth we will get back "duplicate"
246 * shallow and unshallow commands every time there
247 * is a block of have lines exchanged.
248 */
249 char *line;
250 while ((line = packet_read_line(fd, NULL))) {
251 if (starts_with(line, "shallow "))
252 continue;
253 if (starts_with(line, "unshallow "))
254 continue;
255 die(_("git fetch-pack: expected shallow list"));
256 }
257 }
258}
259static enum ack_type get_ack(int fd, struct object_id *result_oid)
261{
262 int len;
263 char *line = packet_read_line(fd, &len);
264 const char *arg;
265 if (!line)
267 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
268 if (!strcmp(line, "NAK"))
269 return NAK;
270 if (skip_prefix(line, "ACK ", &arg)) {
271 if (!get_oid_hex(arg, result_oid)) {
272 arg += 40;
273 len -= arg - line;
274 if (len < 1)
275 return ACK;
276 if (strstr(arg, "continue"))
277 return ACK_continue;
278 if (strstr(arg, "common"))
279 return ACK_common;
280 if (strstr(arg, "ready"))
281 return ACK_ready;
282 return ACK;
283 }
284 }
285 if (skip_prefix(line, "ERR ", &arg))
286 die(_("remote error: %s"), arg);
287 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), line);
288}
289static void send_request(struct fetch_pack_args *args,
291 int fd, struct strbuf *buf)
292{
293 if (args->stateless_rpc) {
294 send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
295 packet_flush(fd);
296 } else
297 write_or_die(fd, buf->buf, buf->len);
298}
299static void insert_one_alternate_object(struct object *obj)
301{
302 rev_list_insert_ref(NULL, &obj->oid);
303}
304#define INITIAL_FLUSH 16
306#define PIPESAFE_FLUSH 32
307#define LARGE_FLUSH 16384
308static int next_flush(int stateless_rpc, int count)
310{
311 if (stateless_rpc) {
312 if (count < LARGE_FLUSH)
313 count <<= 1;
314 else
315 count = count * 11 / 10;
316 } else {
317 if (count < PIPESAFE_FLUSH)
318 count <<= 1;
319 else
320 count += PIPESAFE_FLUSH;
321 }
322 return count;
323}
324static int find_common(struct fetch_pack_args *args,
326 int fd[2], struct object_id *result_oid,
327 struct ref *refs)
328{
329 int fetching;
330 int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
331 const struct object_id *oid;
332 unsigned in_vain = 0;
333 int got_continue = 0;
334 int got_ready = 0;
335 struct strbuf req_buf = STRBUF_INIT;
336 size_t state_len = 0;
337 if (args->stateless_rpc && multi_ack == 1)
339 die(_("--stateless-rpc requires multi_ack_detailed"));
340 if (marked)
341 for_each_ref(clear_marks, NULL);
342 marked = 1;
343 for_each_ref(rev_list_insert_ref_oid, NULL);
345 for_each_cached_alternate(insert_one_alternate_object);
346 fetching = 0;
348 for ( ; refs ; refs = refs->next) {
349 struct object_id *remote = &refs->old_oid;
350 const char *remote_hex;
351 struct object *o;
352 /*
354 * If that object is complete (i.e. it is an ancestor of a
355 * local ref), we tell them we have it but do not have to
356 * tell them about its ancestors, which they already know
357 * about.
358 *
359 * We use lookup_object here because we are only
360 * interested in the case we *know* the object is
361 * reachable and we have already scanned it.
362 */
363 if (((o = lookup_object(remote->hash)) != NULL) &&
364 (o->flags & COMPLETE)) {
365 continue;
366 }
367 remote_hex = oid_to_hex(remote);
369 if (!fetching) {
370 struct strbuf c = STRBUF_INIT;
371 if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
372 if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
373 if (no_done) strbuf_addstr(&c, " no-done");
374 if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
375 if (use_sideband == 1) strbuf_addstr(&c, " side-band");
376 if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
377 if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
378 if (args->no_progress) strbuf_addstr(&c, " no-progress");
379 if (args->include_tag) strbuf_addstr(&c, " include-tag");
380 if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
381 if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
382 if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
383 if (agent_supported) strbuf_addf(&c, " agent=%s",
384 git_user_agent_sanitized());
385 if (args->filter_options.choice)
386 strbuf_addstr(&c, " filter");
387 packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
388 strbuf_release(&c);
389 } else
390 packet_buf_write(&req_buf, "want %s\n", remote_hex);
391 fetching++;
392 }
393 if (!fetching) {
395 strbuf_release(&req_buf);
396 packet_flush(fd[1]);
397 return 1;
398 }
399 if (is_repository_shallow(the_repository))
401 write_shallow_commits(&req_buf, 1, NULL);
402 if (args->depth > 0)
403 packet_buf_write(&req_buf, "deepen %d", args->depth);
404 if (args->deepen_since) {
405 timestamp_t max_age = approxidate(args->deepen_since);
406 packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
407 }
408 if (args->deepen_not) {
409 int i;
410 for (i = 0; i < args->deepen_not->nr; i++) {
411 struct string_list_item *s = args->deepen_not->items + i;
412 packet_buf_write(&req_buf, "deepen-not %s", s->string);
413 }
414 }
415 if (server_supports_filtering && args->filter_options.choice)
416 packet_buf_write(&req_buf, "filter %s",
417 args->filter_options.filter_spec);
418 packet_buf_flush(&req_buf);
419 state_len = req_buf.len;
420 if (args->deepen) {
422 char *line;
423 const char *arg;
424 struct object_id oid;
425 send_request(args, fd[1], &req_buf);
427 while ((line = packet_read_line(fd[0], NULL))) {
428 if (skip_prefix(line, "shallow ", &arg)) {
429 if (get_oid_hex(arg, &oid))
430 die(_("invalid shallow line: %s"), line);
431 register_shallow(the_repository, &oid);
432 continue;
433 }
434 if (skip_prefix(line, "unshallow ", &arg)) {
435 if (get_oid_hex(arg, &oid))
436 die(_("invalid unshallow line: %s"), line);
437 if (!lookup_object(oid.hash))
438 die(_("object not found: %s"), line);
439 /* make sure that it is parsed as shallow */
440 if (!parse_object(&oid))
441 die(_("error in object: %s"), line);
442 if (unregister_shallow(&oid))
443 die(_("no shallow found: %s"), line);
444 continue;
445 }
446 die(_("expected shallow/unshallow, got %s"), line);
447 }
448 } else if (!args->stateless_rpc)
449 send_request(args, fd[1], &req_buf);
450 if (!args->stateless_rpc) {
452 /* If we aren't using the stateless-rpc interface
453 * we don't need to retain the headers.
454 */
455 strbuf_setlen(&req_buf, 0);
456 state_len = 0;
457 }
458 flushes = 0;
460 retval = -1;
461 if (args->no_dependents)
462 goto done;
463 while ((oid = get_rev())) {
464 packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
465 print_verbose(args, "have %s", oid_to_hex(oid));
466 in_vain++;
467 if (flush_at <= ++count) {
468 int ack;
469 packet_buf_flush(&req_buf);
471 send_request(args, fd[1], &req_buf);
472 strbuf_setlen(&req_buf, state_len);
473 flushes++;
474 flush_at = next_flush(args->stateless_rpc, count);
475 /*
477 * We keep one window "ahead" of the other side, and
478 * will wait for an ACK only on the next one
479 */
480 if (!args->stateless_rpc && count == INITIAL_FLUSH)
481 continue;
482 consume_shallow_list(args, fd[0]);
484 do {
485 ack = get_ack(fd[0], result_oid);
486 if (ack)
487 print_verbose(args, _("got %s %d %s"), "ack",
488 ack, oid_to_hex(result_oid));
489 switch (ack) {
490 case ACK:
491 flushes = 0;
492 multi_ack = 0;
493 retval = 0;
494 goto done;
495 case ACK_common:
496 case ACK_ready:
497 case ACK_continue: {
498 struct commit *commit =
499 lookup_commit(result_oid);
500 if (!commit)
501 die(_("invalid commit %s"), oid_to_hex(result_oid));
502 if (args->stateless_rpc
503 && ack == ACK_common
504 && !(commit->object.flags & COMMON)) {
505 /* We need to replay the have for this object
506 * on the next RPC request so the peer knows
507 * it is in common with us.
508 */
509 const char *hex = oid_to_hex(result_oid);
510 packet_buf_write(&req_buf, "have %s\n", hex);
511 state_len = req_buf.len;
512 /*
513 * Reset in_vain because an ack
514 * for this commit has not been
515 * seen.
516 */
517 in_vain = 0;
518 } else if (!args->stateless_rpc
519 || ack != ACK_common)
520 in_vain = 0;
521 mark_common(commit, 0, 1);
522 retval = 0;
523 got_continue = 1;
524 if (ack == ACK_ready) {
525 clear_prio_queue(&rev_list);
526 got_ready = 1;
527 }
528 break;
529 }
530 }
531 } while (ack);
532 flushes--;
533 if (got_continue && MAX_IN_VAIN < in_vain) {
534 print_verbose(args, _("giving up"));
535 break; /* give up */
536 }
537 }
538 }
539done:
540 if (!got_ready || !no_done) {
541 packet_buf_write(&req_buf, "done\n");
542 send_request(args, fd[1], &req_buf);
543 }
544 print_verbose(args, _("done"));
545 if (retval != 0) {
546 multi_ack = 0;
547 flushes++;
548 }
549 strbuf_release(&req_buf);
550 if (!got_ready || !no_done)
552 consume_shallow_list(args, fd[0]);
553 while (flushes || multi_ack) {
554 int ack = get_ack(fd[0], result_oid);
555 if (ack) {
556 print_verbose(args, _("got %s (%d) %s"), "ack",
557 ack, oid_to_hex(result_oid));
558 if (ack == ACK)
559 return 0;
560 multi_ack = 1;
561 continue;
562 }
563 flushes--;
564 }
565 /* it is no error to fetch into a completely empty repo */
566 return count ? retval : 0;
567}
568static struct commit_list *complete;
570static int mark_complete(const struct object_id *oid)
572{
573 struct object *o = parse_object(oid);
574 while (o && o->type == OBJ_TAG) {
576 struct tag *t = (struct tag *) o;
577 if (!t->tagged)
578 break; /* broken repository */
579 o->flags |= COMPLETE;
580 o = parse_object(&t->tagged->oid);
581 }
582 if (o && o->type == OBJ_COMMIT) {
583 struct commit *commit = (struct commit *)o;
584 if (!(commit->object.flags & COMPLETE)) {
585 commit->object.flags |= COMPLETE;
586 commit_list_insert(commit, &complete);
587 }
588 }
589 return 0;
590}
591static int mark_complete_oid(const char *refname, const struct object_id *oid,
593 int flag, void *cb_data)
594{
595 return mark_complete(oid);
596}
597static void mark_recent_complete_commits(struct fetch_pack_args *args,
599 timestamp_t cutoff)
600{
601 while (complete && cutoff <= complete->item->date) {
602 print_verbose(args, _("Marking %s as complete"),
603 oid_to_hex(&complete->item->object.oid));
604 pop_most_recent_commit(&complete, COMPLETE);
605 }
606}
607static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
609{
610 for (; refs; refs = refs->next)
611 oidset_insert(oids, &refs->old_oid);
612}
613static int tip_oids_contain(struct oidset *tip_oids,
615 struct ref *unmatched, struct ref *newlist,
616 const struct object_id *id)
617{
618 /*
619 * Note that this only looks at the ref lists the first time it's
620 * called. This works out in filter_refs() because even though it may
621 * add to "newlist" between calls, the additions will always be for
622 * oids that are already in the set.
623 */
624 if (!tip_oids->map.map.tablesize) {
625 add_refs_to_oidset(tip_oids, unmatched);
626 add_refs_to_oidset(tip_oids, newlist);
627 }
628 return oidset_contains(tip_oids, id);
629}
630static void filter_refs(struct fetch_pack_args *args,
632 struct ref **refs,
633 struct ref **sought, int nr_sought)
634{
635 struct ref *newlist = NULL;
636 struct ref **newtail = &newlist;
637 struct ref *unmatched = NULL;
638 struct ref *ref, *next;
639 struct oidset tip_oids = OIDSET_INIT;
640 int i;
641 i = 0;
643 for (ref = *refs; ref; ref = next) {
644 int keep = 0;
645 next = ref->next;
646 if (starts_with(ref->name, "refs/") &&
648 check_refname_format(ref->name, 0))
649 ; /* trash */
650 else {
651 while (i < nr_sought) {
652 int cmp = strcmp(ref->name, sought[i]->name);
653 if (cmp < 0)
654 break; /* definitely do not have it */
655 else if (cmp == 0) {
656 keep = 1; /* definitely have it */
657 sought[i]->match_status = REF_MATCHED;
658 }
659 i++;
660 }
661 if (!keep && args->fetch_all &&
663 (!args->deepen || !starts_with(ref->name, "refs/tags/")))
664 keep = 1;
665 }
666 if (keep) {
668 *newtail = ref;
669 ref->next = NULL;
670 newtail = &ref->next;
671 } else {
672 ref->next = unmatched;
673 unmatched = ref;
674 }
675 }
676 /* Append unmatched requests to the list */
678 for (i = 0; i < nr_sought; i++) {
679 struct object_id oid;
680 const char *p;
681 ref = sought[i];
683 if (ref->match_status != REF_NOT_MATCHED)
684 continue;
685 if (parse_oid_hex(ref->name, &oid, &p) ||
686 *p != '\0' ||
687 oidcmp(&oid, &ref->old_oid))
688 continue;
689 if ((allow_unadvertised_object_request &
691 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)) ||
692 tip_oids_contain(&tip_oids, unmatched, newlist,
693 &ref->old_oid)) {
694 ref->match_status = REF_MATCHED;
695 *newtail = copy_ref(ref);
696 newtail = &(*newtail)->next;
697 } else {
698 ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
699 }
700 }
701 oidset_clear(&tip_oids);
703 for (ref = unmatched; ref; ref = next) {
704 next = ref->next;
705 free(ref);
706 }
707 *refs = newlist;
709}
710static void mark_alternate_complete(struct object *obj)
712{
713 mark_complete(&obj->oid);
714}
715struct loose_object_iter {
717 struct oidset *loose_object_set;
718 struct ref *refs;
719};
720/*
722 * If the number of refs is not larger than the number of loose objects,
723 * this function stops inserting.
724 */
725static int add_loose_objects_to_set(const struct object_id *oid,
726 const char *path,
727 void *data)
728{
729 struct loose_object_iter *iter = data;
730 oidset_insert(iter->loose_object_set, oid);
731 if (iter->refs == NULL)
732 return 1;
733 iter->refs = iter->refs->next;
735 return 0;
736}
737static int everything_local(struct fetch_pack_args *args,
739 struct ref **refs,
740 struct ref **sought, int nr_sought)
741{
742 struct ref *ref;
743 int retval;
744 int old_save_commit_buffer = save_commit_buffer;
745 timestamp_t cutoff = 0;
746 struct oidset loose_oid_set = OIDSET_INIT;
747 int use_oidset = 0;
748 struct loose_object_iter iter = {&loose_oid_set, *refs};
749 /* Enumerate all loose objects or know refs are not so many. */
751 use_oidset = !for_each_loose_object(add_loose_objects_to_set,
752 &iter, 0);
753 save_commit_buffer = 0;
755 for (ref = *refs; ref; ref = ref->next) {
757 struct object *o;
758 unsigned int flags = OBJECT_INFO_QUICK;
759 if (use_oidset &&
761 !oidset_contains(&loose_oid_set, &ref->old_oid)) {
762 /*
763 * I know this does not exist in the loose form,
764 * so check if it exists in a non-loose form.
765 */
766 flags |= OBJECT_INFO_IGNORE_LOOSE;
767 }
768 if (!has_object_file_with_flags(&ref->old_oid, flags))
770 continue;
771 o = parse_object(&ref->old_oid);
772 if (!o)
773 continue;
774 /* We already have it -- which may mean that we were
776 * in sync with the other side at some time after
777 * that (it is OK if we guess wrong here).
778 */
779 if (o->type == OBJ_COMMIT) {
780 struct commit *commit = (struct commit *)o;
781 if (!cutoff || cutoff < commit->date)
782 cutoff = commit->date;
783 }
784 }
785 oidset_clear(&loose_oid_set);
787 if (!args->no_dependents) {
789 if (!args->deepen) {
790 for_each_ref(mark_complete_oid, NULL);
791 for_each_cached_alternate(mark_alternate_complete);
792 commit_list_sort_by_date(&complete);
793 if (cutoff)
794 mark_recent_complete_commits(args, cutoff);
795 }
796 /*
798 * Mark all complete remote refs as common refs.
799 * Don't mark them common yet; the server has to be told so first.
800 */
801 for (ref = *refs; ref; ref = ref->next) {
802 struct object *o = deref_tag(lookup_object(ref->old_oid.hash),
803 NULL, 0);
804 if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
806 continue;
807 if (!(o->flags & SEEN)) {
809 rev_list_push((struct commit *)o, COMMON_REF | SEEN);
810 mark_common((struct commit *)o, 1, 1);
812 }
813 }
814 }
815 filter_refs(args, refs, sought, nr_sought);
817 for (retval = 1, ref = *refs; ref ; ref = ref->next) {
819 const struct object_id *remote = &ref->old_oid;
820 struct object *o;
821 o = lookup_object(remote->hash);
823 if (!o || !(o->flags & COMPLETE)) {
824 retval = 0;
825 print_verbose(args, "want %s (%s)", oid_to_hex(remote),
826 ref->name);
827 continue;
828 }
829 print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
830 ref->name);
831 }
832 save_commit_buffer = old_save_commit_buffer;
834 return retval;
836}
837static int sideband_demux(int in, int out, void *data)
839{
840 int *xd = data;
841 int ret;
842 ret = recv_sideband("fetch-pack", xd[0], out);
844 close(out);
845 return ret;
846}
847static int get_pack(struct fetch_pack_args *args,
849 int xd[2], char **pack_lockfile)
850{
851 struct async demux;
852 int do_keep = args->keep_pack;
853 const char *cmd_name;
854 struct pack_header header;
855 int pass_header = 0;
856 struct child_process cmd = CHILD_PROCESS_INIT;
857 int ret;
858 memset(&demux, 0, sizeof(demux));
860 if (use_sideband) {
861 /* xd[] is talking with upload-pack; subprocess reads from
862 * xd[0], spits out band#2 to stderr, and feeds us band#1
863 * through demux->out.
864 */
865 demux.proc = sideband_demux;
866 demux.data = xd;
867 demux.out = -1;
868 demux.isolate_sigpipe = 1;
869 if (start_async(&demux))
870 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
871 }
872 else
873 demux.out = xd[0];
874 if (!args->keep_pack && unpack_limit) {
876 if (read_pack_header(demux.out, &header))
878 die(_("protocol error: bad pack header"));
879 pass_header = 1;
880 if (ntohl(header.hdr_entries) < unpack_limit)
881 do_keep = 0;
882 else
883 do_keep = 1;
884 }
885 if (alternate_shallow_file) {
887 argv_array_push(&cmd.args, "--shallow-file");
888 argv_array_push(&cmd.args, alternate_shallow_file);
889 }
890 if (do_keep || args->from_promisor) {
892 if (pack_lockfile)
893 cmd.out = -1;
894 cmd_name = "index-pack";
895 argv_array_push(&cmd.args, cmd_name);
896 argv_array_push(&cmd.args, "--stdin");
897 if (!args->quiet && !args->no_progress)
898 argv_array_push(&cmd.args, "-v");
899 if (args->use_thin_pack)
900 argv_array_push(&cmd.args, "--fix-thin");
901 if (do_keep && (args->lock_pack || unpack_limit)) {
902 char hostname[HOST_NAME_MAX + 1];
903 if (xgethostname(hostname, sizeof(hostname)))
904 xsnprintf(hostname, sizeof(hostname), "localhost");
905 argv_array_pushf(&cmd.args,
906 "--keep=fetch-pack %"PRIuMAX " on %s",
907 (uintmax_t)getpid(), hostname);
908 }
909 if (args->check_self_contained_and_connected)
910 argv_array_push(&cmd.args, "--check-self-contained-and-connected");
911 if (args->from_promisor)
912 argv_array_push(&cmd.args, "--promisor");
913 }
914 else {
915 cmd_name = "unpack-objects";
916 argv_array_push(&cmd.args, cmd_name);
917 if (args->quiet || args->no_progress)
918 argv_array_push(&cmd.args, "-q");
919 args->check_self_contained_and_connected = 0;
920 }
921 if (pass_header)
923 argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
924 ntohl(header.hdr_version),
925 ntohl(header.hdr_entries));
926 if (fetch_fsck_objects >= 0
927 ? fetch_fsck_objects
928 : transfer_fsck_objects >= 0
929 ? transfer_fsck_objects
930 : 0) {
931 if (args->from_promisor)
932 /*
933 * We cannot use --strict in index-pack because it
934 * checks both broken objects and links, but we only
935 * want to check for broken objects.
936 */
937 argv_array_push(&cmd.args, "--fsck-objects");
938 else
939 argv_array_push(&cmd.args, "--strict");
940 }
941 cmd.in = demux.out;
943 cmd.git_cmd = 1;
944 if (start_command(&cmd))
945 die(_("fetch-pack: unable to fork off %s"), cmd_name);
946 if (do_keep && pack_lockfile) {
947 *pack_lockfile = index_pack_lockfile(cmd.out);
948 close(cmd.out);
949 }
950 if (!use_sideband)
952 /* Closed by start_command() */
953 xd[0] = -1;
954 ret = finish_command(&cmd);
956 if (!ret || (args->check_self_contained_and_connected && ret == 1))
957 args->self_contained_and_connected =
958 args->check_self_contained_and_connected &&
959 ret == 0;
960 else
961 die(_("%s failed"), cmd_name);
962 if (use_sideband && finish_async(&demux))
963 die(_("error in sideband demultiplexer"));
964 return 0;
965}
966static int cmp_ref_by_name(const void *a_, const void *b_)
968{
969 const struct ref *a = *((const struct ref **)a_);
970 const struct ref *b = *((const struct ref **)b_);
971 return strcmp(a->name, b->name);
972}
973static struct ref *do_fetch_pack(struct fetch_pack_args *args,
975 int fd[2],
976 const struct ref *orig_ref,
977 struct ref **sought, int nr_sought,
978 struct shallow_info *si,
979 char **pack_lockfile)
980{
981 struct ref *ref = copy_ref_list(orig_ref);
982 struct object_id oid;
983 const char *agent_feature;
984 int agent_len;
985 sort_ref_list(&ref, ref_compare_name);
987 QSORT(sought, nr_sought, cmp_ref_by_name);
988 if ((args->depth > 0 || is_repository_shallow(the_repository)) && !server_supports("shallow"))
990 die(_("Server does not support shallow clients"));
991 if (args->depth > 0 || args->deepen_since || args->deepen_not)
992 args->deepen = 1;
993 if (server_supports("multi_ack_detailed")) {
994 print_verbose(args, _("Server supports multi_ack_detailed"));
995 multi_ack = 2;
996 if (server_supports("no-done")) {
997 print_verbose(args, _("Server supports no-done"));
998 if (args->stateless_rpc)
999 no_done = 1;
1000 }
1001 }
1002 else if (server_supports("multi_ack")) {
1003 print_verbose(args, _("Server supports multi_ack"));
1004 multi_ack = 1;
1005 }
1006 if (server_supports("side-band-64k")) {
1007 print_verbose(args, _("Server supports side-band-64k"));
1008 use_sideband = 2;
1009 }
1010 else if (server_supports("side-band")) {
1011 print_verbose(args, _("Server supports side-band"));
1012 use_sideband = 1;
1013 }
1014 if (server_supports("allow-tip-sha1-in-want")) {
1015 print_verbose(args, _("Server supports allow-tip-sha1-in-want"));
1016 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1017 }
1018 if (server_supports("allow-reachable-sha1-in-want")) {
1019 print_verbose(args, _("Server supports allow-reachable-sha1-in-want"));
1020 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1021 }
1022 if (!server_supports("thin-pack"))
1023 args->use_thin_pack = 0;
1024 if (!server_supports("no-progress"))
1025 args->no_progress = 0;
1026 if (!server_supports("include-tag"))
1027 args->include_tag = 0;
1028 if (server_supports("ofs-delta"))
1029 print_verbose(args, _("Server supports ofs-delta"));
1030 else
1031 prefer_ofs_delta = 0;
1032 if (server_supports("filter")) {
1034 server_supports_filtering = 1;
1035 print_verbose(args, _("Server supports filter"));
1036 } else if (args->filter_options.choice) {
1037 warning("filtering not recognized by server, ignoring");
1038 }
1039 if ((agent_feature = server_feature_value("agent", &agent_len))) {
1041 agent_supported = 1;
1042 if (agent_len)
1043 print_verbose(args, _("Server version is %.*s"),
1044 agent_len, agent_feature);
1045 }
1046 if (server_supports("deepen-since"))
1047 deepen_since_ok = 1;
1048 else if (args->deepen_since)
1049 die(_("Server does not support --shallow-since"));
1050 if (server_supports("deepen-not"))
1051 deepen_not_ok = 1;
1052 else if (args->deepen_not)
1053 die(_("Server does not support --shallow-exclude"));
1054 if (!server_supports("deepen-relative") && args->deepen_relative)
1055 die(_("Server does not support --deepen"));
1056 if (everything_local(args, &ref, sought, nr_sought)) {
1058 packet_flush(fd[1]);
1059 goto all_done;
1060 }
1061 if (find_common(args, fd, &oid, ref) < 0)
1062 if (!args->keep_pack)
1063 /* When cloning, it is not unusual to have
1064 * no common commit.
1065 */
1066 warning(_("no common commits"));
1067 if (args->stateless_rpc)
1069 packet_flush(fd[1]);
1070 if (args->deepen)
1071 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1072 NULL);
1073 else if (si->nr_ours || si->nr_theirs)
1074 alternate_shallow_file = setup_temporary_shallow(si->shallow);
1075 else
1076 alternate_shallow_file = NULL;
1077 if (get_pack(args, fd, pack_lockfile))
1078 die(_("git fetch-pack: fetch failed."));
1079 all_done:
1081 return ref;
1082}
1083static void add_shallow_requests(struct strbuf *req_buf,
1085 const struct fetch_pack_args *args)
1086{
1087 if (is_repository_shallow(the_repository))
1088 write_shallow_commits(req_buf, 1, NULL);
1089 if (args->depth > 0)
1090 packet_buf_write(req_buf, "deepen %d", args->depth);
1091 if (args->deepen_since) {
1092 timestamp_t max_age = approxidate(args->deepen_since);
1093 packet_buf_write(req_buf, "deepen-since %"PRItime, max_age);
1094 }
1095 if (args->deepen_not) {
1096 int i;
1097 for (i = 0; i < args->deepen_not->nr; i++) {
1098 struct string_list_item *s = args->deepen_not->items + i;
1099 packet_buf_write(req_buf, "deepen-not %s", s->string);
1100 }
1101 }
1102}
1103static void add_wants(const struct ref *wants, struct strbuf *req_buf)
1105{
1106 for ( ; wants ; wants = wants->next) {
1107 const struct object_id *remote = &wants->old_oid;
1108 const char *remote_hex;
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 remote_hex = oid_to_hex(remote);
1127 packet_buf_write(req_buf, "want %s\n", remote_hex);
1128 }
1129}
1130static void add_common(struct strbuf *req_buf, struct oidset *common)
1132{
1133 struct oidset_iter iter;
1134 const struct object_id *oid;
1135 oidset_iter_init(common, &iter);
1136 while ((oid = oidset_iter_next(&iter))) {
1138 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1139 }
1140}
1141static int add_haves(struct strbuf *req_buf, int *haves_to_send, int *in_vain)
1143{
1144 int ret = 0;
1145 int haves_added = 0;
1146 const struct object_id *oid;
1147 while ((oid = get_rev())) {
1149 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1150 if (++haves_added >= *haves_to_send)
1151 break;
1152 }
1153 *in_vain += haves_added;
1155 if (!haves_added || *in_vain >= MAX_IN_VAIN) {
1156 /* Send Done */
1157 packet_buf_write(req_buf, "done\n");
1158 ret = 1;
1159 }
1160 /* Increase haves to send on next round */
1162 *haves_to_send = next_flush(1, *haves_to_send);
1163 return ret;
1165}
1166static int send_fetch_request(int fd_out, const struct fetch_pack_args *args,
1168 const struct ref *wants, struct oidset *common,
1169 int *haves_to_send, int *in_vain)
1170{
1171 int ret = 0;
1172 struct strbuf req_buf = STRBUF_INIT;
1173 if (server_supports_v2("fetch", 1))
1175 packet_buf_write(&req_buf, "command=fetch");
1176 if (server_supports_v2("agent", 0))
1177 packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
1178 if (args->server_options && args->server_options->nr &&
1179 server_supports_v2("server-option", 1)) {
1180 int i;
1181 for (i = 0; i < args->server_options->nr; i++)
1182 packet_write_fmt(fd_out, "server-option=%s",
1183 args->server_options->items[i].string);
1184 }
1185 packet_buf_delim(&req_buf);
1187 if (args->use_thin_pack)
1188 packet_buf_write(&req_buf, "thin-pack");
1189 if (args->no_progress)
1190 packet_buf_write(&req_buf, "no-progress");
1191 if (args->include_tag)
1192 packet_buf_write(&req_buf, "include-tag");
1193 if (prefer_ofs_delta)
1194 packet_buf_write(&req_buf, "ofs-delta");
1195 /* Add shallow-info and deepen request */
1197 if (server_supports_feature("fetch", "shallow", 0))
1198 add_shallow_requests(&req_buf, args);
1199 else if (is_repository_shallow(the_repository) || args->deepen)
1200 die(_("Server does not support shallow requests"));
1201 /* Add filter */
1203 if (server_supports_feature("fetch", "filter", 0) &&
1204 args->filter_options.choice) {
1205 print_verbose(args, _("Server supports filter"));
1206 packet_buf_write(&req_buf, "filter %s",
1207 args->filter_options.filter_spec);
1208 } else if (args->filter_options.choice) {
1209 warning("filtering not recognized by server, ignoring");
1210 }
1211 /* add wants */
1213 add_wants(wants, &req_buf);
1214 if (args->no_dependents) {
1216 packet_buf_write(&req_buf, "done");
1217 ret = 1;
1218 } else {
1219 /* Add all of the common commits we've found in previous rounds */
1220 add_common(&req_buf, common);
1221 /* Add initial haves */
1223 ret = add_haves(&req_buf, haves_to_send, in_vain);
1224 }
1225 /* Send request */
1227 packet_buf_flush(&req_buf);
1228 write_or_die(fd_out, req_buf.buf, req_buf.len);
1229 strbuf_release(&req_buf);
1231 return ret;
1232}
1233/*
1235 * Processes a section header in a server's response and checks if it matches
1236 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1237 * not consumed); if 0, the line will be consumed and the function will die if
1238 * the section header doesn't match what was expected.
1239 */
1240static int process_section_header(struct packet_reader *reader,
1241 const char *section, int peek)
1242{
1243 int ret;
1244 if (packet_reader_peek(reader) != PACKET_READ_NORMAL)
1246 die("error reading section header '%s'", section);
1247 ret = !strcmp(reader->line, section);
1249 if (!peek) {
1251 if (!ret)
1252 die("expected '%s', received '%s'",
1253 section, reader->line);
1254 packet_reader_read(reader);
1255 }
1256 return ret;
1258}
1259static int process_acks(struct packet_reader *reader, struct oidset *common)
1261{
1262 /* received */
1263 int received_ready = 0;
1264 int received_ack = 0;
1265 process_section_header(reader, "acknowledgments", 0);
1267 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1268 const char *arg;
1269 if (!strcmp(reader->line, "NAK"))
1271 continue;
1272 if (skip_prefix(reader->line, "ACK ", &arg)) {
1274 struct object_id oid;
1275 if (!get_oid_hex(arg, &oid)) {
1276 struct commit *commit;
1277 oidset_insert(common, &oid);
1278 commit = lookup_commit(&oid);
1279 mark_common(commit, 0, 1);
1280 }
1281 continue;
1282 }
1283 if (!strcmp(reader->line, "ready")) {
1285 clear_prio_queue(&rev_list);
1286 received_ready = 1;
1287 continue;
1288 }
1289 die("unexpected acknowledgment line: '%s'", reader->line);
1291 }
1292 if (reader->status != PACKET_READ_FLUSH &&
1294 reader->status != PACKET_READ_DELIM)
1295 die("error processing acks: %d", reader->status);
1296 /* return 0 if no common, 1 if there are common, or 2 if ready */
1298 return received_ready ? 2 : (received_ack ? 1 : 0);
1299}
1300static void receive_shallow_info(struct fetch_pack_args *args,
1302 struct packet_reader *reader)
1303{
1304 process_section_header(reader, "shallow-info", 0);
1305 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1306 const char *arg;
1307 struct object_id oid;
1308 if (skip_prefix(reader->line, "shallow ", &arg)) {
1310 if (get_oid_hex(arg, &oid))
1311 die(_("invalid shallow line: %s"), reader->line);
1312 register_shallow(the_repository, &oid);
1313 continue;
1314 }
1315 if (skip_prefix(reader->line, "unshallow ", &arg)) {
1316 if (get_oid_hex(arg, &oid))
1317 die(_("invalid unshallow line: %s"), reader->line);
1318 if (!lookup_object(oid.hash))
1319 die(_("object not found: %s"), reader->line);
1320 /* make sure that it is parsed as shallow */
1321 if (!parse_object(&oid))
1322 die(_("error in object: %s"), reader->line);
1323 if (unregister_shallow(&oid))
1324 die(_("no shallow found: %s"), reader->line);
1325 continue;
1326 }
1327 die(_("expected shallow/unshallow, got %s"), reader->line);
1328 }
1329 if (reader->status != PACKET_READ_FLUSH &&
1331 reader->status != PACKET_READ_DELIM)
1332 die("error processing shallow info: %d", reader->status);
1333 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, NULL);
1335 args->deepen = 1;
1336}
1337enum fetch_state {
1339 FETCH_CHECK_LOCAL = 0,
1340 FETCH_SEND_REQUEST,
1341 FETCH_PROCESS_ACKS,
1342 FETCH_GET_PACK,
1343 FETCH_DONE,
1344};
1345static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
1347 int fd[2],
1348 const struct ref *orig_ref,
1349 struct ref **sought, int nr_sought,
1350 char **pack_lockfile)
1351{
1352 struct ref *ref = copy_ref_list(orig_ref);
1353 enum fetch_state state = FETCH_CHECK_LOCAL;
1354 struct oidset common = OIDSET_INIT;
1355 struct packet_reader reader;
1356 int in_vain = 0;
1357 int haves_to_send = INITIAL_FLUSH;
1358 packet_reader_init(&reader, fd[0], NULL, 0,
1359 PACKET_READ_CHOMP_NEWLINE);
1360 while (state != FETCH_DONE) {
1362 switch (state) {
1363 case FETCH_CHECK_LOCAL:
1364 sort_ref_list(&ref, ref_compare_name);
1365 QSORT(sought, nr_sought, cmp_ref_by_name);
1366 /* v2 supports these by default */
1368 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1369 use_sideband = 2;
1370 if (args->depth > 0 || args->deepen_since || args->deepen_not)
1371 args->deepen = 1;
1372 if (marked)
1374 for_each_ref(clear_marks, NULL);
1375 marked = 1;
1376 for_each_ref(rev_list_insert_ref_oid, NULL);
1378 for_each_cached_alternate(insert_one_alternate_object);
1379 /* Filter 'ref' by 'sought' and those that aren't local */
1381 if (everything_local(args, &ref, sought, nr_sought))
1382 state = FETCH_DONE;
1383 else
1384 state = FETCH_SEND_REQUEST;
1385 break;
1386 case FETCH_SEND_REQUEST:
1387 if (send_fetch_request(fd[1], args, ref, &common,
1388 &haves_to_send, &in_vain))
1389 state = FETCH_GET_PACK;
1390 else
1391 state = FETCH_PROCESS_ACKS;
1392 break;
1393 case FETCH_PROCESS_ACKS:
1394 /* Process ACKs/NAKs */
1395 switch (process_acks(&reader, &common)) {
1396 case 2:
1397 state = FETCH_GET_PACK;
1398 break;
1399 case 1:
1400 in_vain = 0;
1401 /* fallthrough */
1402 default:
1403 state = FETCH_SEND_REQUEST;
1404 break;
1405 }
1406 break;
1407 case FETCH_GET_PACK:
1408 /* Check for shallow-info section */
1409 if (process_section_header(&reader, "shallow-info", 1))
1410 receive_shallow_info(args, &reader);
1411 /* get the pack */
1413 process_section_header(&reader, "packfile", 0);
1414 if (get_pack(args, fd, pack_lockfile))
1415 die(_("git fetch-pack: fetch failed."));
1416 state = FETCH_DONE;
1418 break;
1419 case FETCH_DONE:
1420 continue;
1421 }
1422 }
1423 oidset_clear(&common);
1425 return ref;
1426}
1427static void fetch_pack_config(void)
1429{
1430 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
1431 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
1432 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
1433 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
1434 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
1435 git_config(git_default_config, NULL);
1437}
1438static void fetch_pack_setup(void)
1440{
1441 static int did_setup;
1442 if (did_setup)
1443 return;
1444 fetch_pack_config();
1445 if (0 <= transfer_unpack_limit)
1446 unpack_limit = transfer_unpack_limit;
1447 else if (0 <= fetch_unpack_limit)
1448 unpack_limit = fetch_unpack_limit;
1449 did_setup = 1;
1450}
1451static int remove_duplicates_in_refs(struct ref **ref, int nr)
1453{
1454 struct string_list names = STRING_LIST_INIT_NODUP;
1455 int src, dst;
1456 for (src = dst = 0; src < nr; src++) {
1458 struct string_list_item *item;
1459 item = string_list_insert(&names, ref[src]->name);
1460 if (item->util)
1461 continue; /* already have it */
1462 item->util = ref[src];
1463 if (src != dst)
1464 ref[dst] = ref[src];
1465 dst++;
1466 }
1467 for (src = dst; src < nr; src++)
1468 ref[src] = NULL;
1469 string_list_clear(&names, 0);
1470 return dst;
1471}
1472static void update_shallow(struct fetch_pack_args *args,
1474 struct ref **sought, int nr_sought,
1475 struct shallow_info *si)
1476{
1477 struct oid_array ref = OID_ARRAY_INIT;
1478 int *status;
1479 int i;
1480 if (args->deepen && alternate_shallow_file) {
1482 if (*alternate_shallow_file == '\0') { /* --unshallow */
1483 unlink_or_warn(git_path_shallow(the_repository));
1484 rollback_lock_file(&shallow_lock);
1485 } else
1486 commit_lock_file(&shallow_lock);
1487 return;
1488 }
1489 if (!si->shallow || !si->shallow->nr)
1491 return;
1492 if (args->cloning) {
1494 /*
1495 * remote is shallow, but this is a clone, there are
1496 * no objects in repo to worry about. Accept any
1497 * shallow points that exist in the pack (iow in repo
1498 * after get_pack() and reprepare_packed_git())
1499 */
1500 struct oid_array extra = OID_ARRAY_INIT;
1501 struct object_id *oid = si->shallow->oid;
1502 for (i = 0; i < si->shallow->nr; i++)
1503 if (has_object_file(&oid[i]))
1504 oid_array_append(&extra, &oid[i]);
1505 if (extra.nr) {
1506 setup_alternate_shallow(&shallow_lock,
1507 &alternate_shallow_file,
1508 &extra);
1509 commit_lock_file(&shallow_lock);
1510 }
1511 oid_array_clear(&extra);
1512 return;
1513 }
1514 if (!si->nr_ours && !si->nr_theirs)
1516 return;
1517 remove_nonexistent_theirs_shallow(si);
1519 if (!si->nr_ours && !si->nr_theirs)
1520 return;
1521 for (i = 0; i < nr_sought; i++)
1522 oid_array_append(&ref, &sought[i]->old_oid);
1523 si->ref = &ref;
1524 if (args->update_shallow) {
1526 /*
1527 * remote is also shallow, .git/shallow may be updated
1528 * so all refs can be accepted. Make sure we only add
1529 * shallow roots that are actually reachable from new
1530 * refs.
1531 */
1532 struct oid_array extra = OID_ARRAY_INIT;
1533 struct object_id *oid = si->shallow->oid;
1534 assign_shallow_commits_to_refs(si, NULL, NULL);
1535 if (!si->nr_ours && !si->nr_theirs) {
1536 oid_array_clear(&ref);
1537 return;
1538 }
1539 for (i = 0; i < si->nr_ours; i++)
1540 oid_array_append(&extra, &oid[si->ours[i]]);
1541 for (i = 0; i < si->nr_theirs; i++)
1542 oid_array_append(&extra, &oid[si->theirs[i]]);
1543 setup_alternate_shallow(&shallow_lock,
1544 &alternate_shallow_file,
1545 &extra);
1546 commit_lock_file(&shallow_lock);
1547 oid_array_clear(&extra);
1548 oid_array_clear(&ref);
1549 return;
1550 }
1551 /*
1553 * remote is also shallow, check what ref is safe to update
1554 * without updating .git/shallow
1555 */
1556 status = xcalloc(nr_sought, sizeof(*status));
1557 assign_shallow_commits_to_refs(si, NULL, status);
1558 if (si->nr_ours || si->nr_theirs) {
1559 for (i = 0; i < nr_sought; i++)
1560 if (status[i])
1561 sought[i]->status = REF_STATUS_REJECT_SHALLOW;
1562 }
1563 free(status);
1564 oid_array_clear(&ref);
1565}
1566struct ref *fetch_pack(struct fetch_pack_args *args,
1568 int fd[], struct child_process *conn,
1569 const struct ref *ref,
1570 const char *dest,
1571 struct ref **sought, int nr_sought,
1572 struct oid_array *shallow,
1573 char **pack_lockfile,
1574 enum protocol_version version)
1575{
1576 struct ref *ref_cpy;
1577 struct shallow_info si;
1578 fetch_pack_setup();
1580 if (nr_sought)
1581 nr_sought = remove_duplicates_in_refs(sought, nr_sought);
1582 if (!ref) {
1584 packet_flush(fd[1]);
1585 die(_("no matching remote head"));
1586 }
1587 prepare_shallow_info(&si, shallow);
1588 if (version == protocol_v2)
1589 ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
1590 pack_lockfile);
1591 else
1592 ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
1593 &si, pack_lockfile);
1594 reprepare_packed_git(the_repository);
1595 update_shallow(args, sought, nr_sought, &si);
1596 clear_shallow_info(&si);
1597 return ref_cpy;
1598}
1599int report_unmatched_refs(struct ref **sought, int nr_sought)
1601{
1602 int i, ret = 0;
1603 for (i = 0; i < nr_sought; i++) {
1605 if (!sought[i])
1606 continue;
1607 switch (sought[i]->match_status) {
1608 case REF_MATCHED:
1609 continue;
1610 case REF_NOT_MATCHED:
1611 error(_("no such remote ref %s"), sought[i]->name);
1612 break;
1613 case REF_UNADVERTISED_NOT_ALLOWED:
1614 error(_("Server does not allow request for unadvertised object %s"),
1615 sought[i]->name);
1616 break;
1617 }
1618 ret = 1;
1619 }
1620 return ret;
1621}