2 #include "repository.h"
12 #include "fetch-pack.h"
14 #include "run-command.h"
16 #include "transport.h"
18 #include "oid-array.h"
21 #include "object-store.h"
22 #include "connected.h"
23 #include "fetch-negotiator.h"
27 static int transfer_unpack_limit = -1;
28 static int fetch_unpack_limit = -1;
29 static int unpack_limit = 100;
30 static int prefer_ofs_delta = 1;
32 static int deepen_since_ok;
33 static int deepen_not_ok;
34 static int fetch_fsck_objects = -1;
35 static int transfer_fsck_objects = -1;
36 static int agent_supported;
37 static int server_supports_filtering;
38 static struct shallow_lock shallow_lock;
39 static const char *alternate_shallow_file;
40 static struct strbuf fsck_msg_types = STRBUF_INIT;
42 /* Remember to update object flag allocation in object.h */
43 #define COMPLETE (1U << 0)
44 #define ALTERNATE (1U << 1)
47 * After sending this many "have"s if we do not get any new ACK , we
48 * give up traversing our history.
50 #define MAX_IN_VAIN 256
52 static int multi_ack, use_sideband;
53 /* Allow specifying sha1 if it is a ref tip. */
54 #define ALLOW_TIP_SHA1 01
55 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
56 #define ALLOW_REACHABLE_SHA1 02
57 static unsigned int allow_unadvertised_object_request;
59 __attribute__((format (printf, 2, 3)))
60 static inline void print_verbose(const struct fetch_pack_args *args,
68 va_start(params, fmt);
69 vfprintf(stderr, fmt, params);
74 struct alternate_object_cache {
75 struct object **items;
79 static void cache_one_alternate(const struct object_id *oid,
82 struct alternate_object_cache *cache = vcache;
83 struct object *obj = parse_object(the_repository, oid);
85 if (!obj || (obj->flags & ALTERNATE))
88 obj->flags |= ALTERNATE;
89 ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
90 cache->items[cache->nr++] = obj;
93 static void for_each_cached_alternate(struct fetch_negotiator *negotiator,
94 void (*cb)(struct fetch_negotiator *,
97 static int initialized;
98 static struct alternate_object_cache cache;
102 for_each_alternate_ref(cache_one_alternate, &cache);
106 for (i = 0; i < cache.nr; i++)
107 cb(negotiator, cache.items[i]);
110 static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
112 const struct object_id *oid)
114 struct object *o = deref_tag(the_repository,
115 parse_object(the_repository, oid),
118 if (o && o->type == OBJ_COMMIT)
119 negotiator->add_tip(negotiator, (struct commit *)o);
124 static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
125 int flag, void *cb_data)
127 return rev_list_insert_ref(cb_data, refname, oid);
138 static void consume_shallow_list(struct fetch_pack_args *args,
139 struct packet_reader *reader)
141 if (args->stateless_rpc && args->deepen) {
142 /* If we sent a depth we will get back "duplicate"
143 * shallow and unshallow commands every time there
144 * is a block of have lines exchanged.
146 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
147 if (starts_with(reader->line, "shallow "))
149 if (starts_with(reader->line, "unshallow "))
151 die(_("git fetch-pack: expected shallow list"));
153 if (reader->status != PACKET_READ_FLUSH)
154 die(_("git fetch-pack: expected a flush packet after shallow list"));
158 static enum ack_type get_ack(struct packet_reader *reader,
159 struct object_id *result_oid)
164 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
165 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
166 len = reader->pktlen;
168 if (!strcmp(reader->line, "NAK"))
170 if (skip_prefix(reader->line, "ACK ", &arg)) {
172 if (!parse_oid_hex(arg, result_oid, &p)) {
173 len -= p - reader->line;
176 if (strstr(p, "continue"))
178 if (strstr(p, "common"))
180 if (strstr(p, "ready"))
185 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader->line);
188 static void send_request(struct fetch_pack_args *args,
189 int fd, struct strbuf *buf)
191 if (args->stateless_rpc) {
192 send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
195 if (write_in_full(fd, buf->buf, buf->len) < 0)
196 die_errno(_("unable to write to remote"));
200 static void insert_one_alternate_object(struct fetch_negotiator *negotiator,
203 rev_list_insert_ref(negotiator, NULL, &obj->oid);
206 #define INITIAL_FLUSH 16
207 #define PIPESAFE_FLUSH 32
208 #define LARGE_FLUSH 16384
210 static int next_flush(int stateless_rpc, int count)
213 if (count < LARGE_FLUSH)
216 count = count * 11 / 10;
218 if (count < PIPESAFE_FLUSH)
221 count += PIPESAFE_FLUSH;
226 static void mark_tips(struct fetch_negotiator *negotiator,
227 const struct oid_array *negotiation_tips)
231 if (!negotiation_tips) {
232 for_each_ref(rev_list_insert_ref_oid, negotiator);
236 for (i = 0; i < negotiation_tips->nr; i++)
237 rev_list_insert_ref(negotiator, NULL,
238 &negotiation_tips->oid[i]);
242 static int find_common(struct fetch_negotiator *negotiator,
243 struct fetch_pack_args *args,
244 int fd[2], struct object_id *result_oid,
248 int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
249 const struct object_id *oid;
250 unsigned in_vain = 0;
251 int got_continue = 0;
253 struct strbuf req_buf = STRBUF_INIT;
254 size_t state_len = 0;
255 struct packet_reader reader;
257 if (args->stateless_rpc && multi_ack == 1)
258 die(_("--stateless-rpc requires multi_ack_detailed"));
260 packet_reader_init(&reader, fd[0], NULL, 0,
261 PACKET_READ_CHOMP_NEWLINE |
262 PACKET_READ_DIE_ON_ERR_PACKET);
264 if (!args->no_dependents) {
265 mark_tips(negotiator, args->negotiation_tips);
266 for_each_cached_alternate(negotiator, insert_one_alternate_object);
270 for ( ; refs ; refs = refs->next) {
271 struct object_id *remote = &refs->old_oid;
272 const char *remote_hex;
276 * If that object is complete (i.e. it is an ancestor of a
277 * local ref), we tell them we have it but do not have to
278 * tell them about its ancestors, which they already know
281 * We use lookup_object here because we are only
282 * interested in the case we *know* the object is
283 * reachable and we have already scanned it.
285 * Do this only if args->no_dependents is false (if it is true,
286 * we cannot trust the object flags).
288 if (!args->no_dependents &&
289 ((o = lookup_object(the_repository, remote)) != NULL) &&
290 (o->flags & COMPLETE)) {
294 remote_hex = oid_to_hex(remote);
296 struct strbuf c = STRBUF_INIT;
297 if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
298 if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
299 if (no_done) strbuf_addstr(&c, " no-done");
300 if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
301 if (use_sideband == 1) strbuf_addstr(&c, " side-band");
302 if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
303 if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
304 if (args->no_progress) strbuf_addstr(&c, " no-progress");
305 if (args->include_tag) strbuf_addstr(&c, " include-tag");
306 if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
307 if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
308 if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
309 if (agent_supported) strbuf_addf(&c, " agent=%s",
310 git_user_agent_sanitized());
311 if (args->filter_options.choice)
312 strbuf_addstr(&c, " filter");
313 packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
316 packet_buf_write(&req_buf, "want %s\n", remote_hex);
321 strbuf_release(&req_buf);
326 if (is_repository_shallow(the_repository))
327 write_shallow_commits(&req_buf, 1, NULL);
329 packet_buf_write(&req_buf, "deepen %d", args->depth);
330 if (args->deepen_since) {
331 timestamp_t max_age = approxidate(args->deepen_since);
332 packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
334 if (args->deepen_not) {
336 for (i = 0; i < args->deepen_not->nr; i++) {
337 struct string_list_item *s = args->deepen_not->items + i;
338 packet_buf_write(&req_buf, "deepen-not %s", s->string);
341 if (server_supports_filtering && args->filter_options.choice) {
343 expand_list_objects_filter_spec(&args->filter_options);
344 packet_buf_write(&req_buf, "filter %s", spec);
346 packet_buf_flush(&req_buf);
347 state_len = req_buf.len;
351 struct object_id oid;
353 send_request(args, fd[1], &req_buf);
354 while (packet_reader_read(&reader) == PACKET_READ_NORMAL) {
355 if (skip_prefix(reader.line, "shallow ", &arg)) {
356 if (get_oid_hex(arg, &oid))
357 die(_("invalid shallow line: %s"), reader.line);
358 register_shallow(the_repository, &oid);
361 if (skip_prefix(reader.line, "unshallow ", &arg)) {
362 if (get_oid_hex(arg, &oid))
363 die(_("invalid unshallow line: %s"), reader.line);
364 if (!lookup_object(the_repository, &oid))
365 die(_("object not found: %s"), reader.line);
366 /* make sure that it is parsed as shallow */
367 if (!parse_object(the_repository, &oid))
368 die(_("error in object: %s"), reader.line);
369 if (unregister_shallow(&oid))
370 die(_("no shallow found: %s"), reader.line);
373 die(_("expected shallow/unshallow, got %s"), reader.line);
375 } else if (!args->stateless_rpc)
376 send_request(args, fd[1], &req_buf);
378 if (!args->stateless_rpc) {
379 /* If we aren't using the stateless-rpc interface
380 * we don't need to retain the headers.
382 strbuf_setlen(&req_buf, 0);
386 trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository);
389 if (args->no_dependents)
391 while ((oid = negotiator->next(negotiator))) {
392 packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
393 print_verbose(args, "have %s", oid_to_hex(oid));
395 if (flush_at <= ++count) {
398 packet_buf_flush(&req_buf);
399 send_request(args, fd[1], &req_buf);
400 strbuf_setlen(&req_buf, state_len);
402 flush_at = next_flush(args->stateless_rpc, count);
405 * We keep one window "ahead" of the other side, and
406 * will wait for an ACK only on the next one
408 if (!args->stateless_rpc && count == INITIAL_FLUSH)
411 consume_shallow_list(args, &reader);
413 ack = get_ack(&reader, result_oid);
415 print_verbose(args, _("got %s %d %s"), "ack",
416 ack, oid_to_hex(result_oid));
426 struct commit *commit =
427 lookup_commit(the_repository,
432 die(_("invalid commit %s"), oid_to_hex(result_oid));
433 was_common = negotiator->ack(negotiator, commit);
434 if (args->stateless_rpc
437 /* We need to replay the have for this object
438 * on the next RPC request so the peer knows
439 * it is in common with us.
441 const char *hex = oid_to_hex(result_oid);
442 packet_buf_write(&req_buf, "have %s\n", hex);
443 state_len = req_buf.len;
445 * Reset in_vain because an ack
446 * for this commit has not been
450 } else if (!args->stateless_rpc
451 || ack != ACK_common)
455 if (ack == ACK_ready)
462 if (got_continue && MAX_IN_VAIN < in_vain) {
463 print_verbose(args, _("giving up"));
471 trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository);
472 if (!got_ready || !no_done) {
473 packet_buf_write(&req_buf, "done\n");
474 send_request(args, fd[1], &req_buf);
476 print_verbose(args, _("done"));
481 strbuf_release(&req_buf);
483 if (!got_ready || !no_done)
484 consume_shallow_list(args, &reader);
485 while (flushes || multi_ack) {
486 int ack = get_ack(&reader, result_oid);
488 print_verbose(args, _("got %s (%d) %s"), "ack",
489 ack, oid_to_hex(result_oid));
497 /* it is no error to fetch into a completely empty repo */
498 return count ? retval : 0;
501 static struct commit_list *complete;
503 static int mark_complete(const struct object_id *oid)
505 struct object *o = parse_object(the_repository, oid);
507 while (o && o->type == OBJ_TAG) {
508 struct tag *t = (struct tag *) o;
510 break; /* broken repository */
511 o->flags |= COMPLETE;
512 o = parse_object(the_repository, &t->tagged->oid);
514 if (o && o->type == OBJ_COMMIT) {
515 struct commit *commit = (struct commit *)o;
516 if (!(commit->object.flags & COMPLETE)) {
517 commit->object.flags |= COMPLETE;
518 commit_list_insert(commit, &complete);
524 static int mark_complete_oid(const char *refname, const struct object_id *oid,
525 int flag, void *cb_data)
527 return mark_complete(oid);
530 static void mark_recent_complete_commits(struct fetch_pack_args *args,
533 while (complete && cutoff <= complete->item->date) {
534 print_verbose(args, _("Marking %s as complete"),
535 oid_to_hex(&complete->item->object.oid));
536 pop_most_recent_commit(&complete, COMPLETE);
540 static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
542 for (; refs; refs = refs->next)
543 oidset_insert(oids, &refs->old_oid);
546 static int is_unmatched_ref(const struct ref *ref)
548 struct object_id oid;
550 return ref->match_status == REF_NOT_MATCHED &&
551 !parse_oid_hex(ref->name, &oid, &p) &&
553 oideq(&oid, &ref->old_oid);
556 static void filter_refs(struct fetch_pack_args *args,
558 struct ref **sought, int nr_sought)
560 struct ref *newlist = NULL;
561 struct ref **newtail = &newlist;
562 struct ref *unmatched = NULL;
563 struct ref *ref, *next;
564 struct oidset tip_oids = OIDSET_INIT;
566 int strict = !(allow_unadvertised_object_request &
567 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
570 for (ref = *refs; ref; ref = next) {
574 if (starts_with(ref->name, "refs/") &&
575 check_refname_format(ref->name, 0)) {
577 * trash or a peeled value; do not even add it to
583 while (i < nr_sought) {
584 int cmp = strcmp(ref->name, sought[i]->name);
586 break; /* definitely do not have it */
588 keep = 1; /* definitely have it */
589 sought[i]->match_status = REF_MATCHED;
594 if (!keep && args->fetch_all &&
595 (!args->deepen || !starts_with(ref->name, "refs/tags/")))
602 newtail = &ref->next;
604 ref->next = unmatched;
610 for (i = 0; i < nr_sought; i++) {
612 if (!is_unmatched_ref(ref))
615 add_refs_to_oidset(&tip_oids, unmatched);
616 add_refs_to_oidset(&tip_oids, newlist);
621 /* Append unmatched requests to the list */
622 for (i = 0; i < nr_sought; i++) {
624 if (!is_unmatched_ref(ref))
627 if (!strict || oidset_contains(&tip_oids, &ref->old_oid)) {
628 ref->match_status = REF_MATCHED;
629 *newtail = copy_ref(ref);
630 newtail = &(*newtail)->next;
632 ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
636 oidset_clear(&tip_oids);
637 free_refs(unmatched);
642 static void mark_alternate_complete(struct fetch_negotiator *unused,
645 mark_complete(&obj->oid);
648 struct loose_object_iter {
649 struct oidset *loose_object_set;
654 * Mark recent commits available locally and reachable from a local ref as
655 * COMPLETE. If args->no_dependents is false, also mark COMPLETE remote refs as
656 * COMMON_REF (otherwise, we are not planning to participate in negotiation, and
657 * thus do not need COMMON_REF marks).
659 * The cutoff time for recency is determined by this heuristic: it is the
660 * earliest commit time of the objects in refs that are commits and that we know
661 * the commit time of.
663 static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
664 struct fetch_pack_args *args,
668 int old_save_commit_buffer = save_commit_buffer;
669 timestamp_t cutoff = 0;
671 save_commit_buffer = 0;
673 trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
674 for (ref = *refs; ref; ref = ref->next) {
677 if (!has_object_file_with_flags(&ref->old_oid,
679 OBJECT_INFO_SKIP_FETCH_OBJECT))
681 o = parse_object(the_repository, &ref->old_oid);
686 * We already have it -- which may mean that we were
687 * in sync with the other side at some time after
688 * that (it is OK if we guess wrong here).
690 if (o->type == OBJ_COMMIT) {
691 struct commit *commit = (struct commit *)o;
692 if (!cutoff || cutoff < commit->date)
693 cutoff = commit->date;
696 trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
699 * This block marks all local refs as COMPLETE, and then recursively marks all
700 * parents of those refs as COMPLETE.
702 trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL);
704 for_each_ref(mark_complete_oid, NULL);
705 for_each_cached_alternate(NULL, mark_alternate_complete);
706 commit_list_sort_by_date(&complete);
708 mark_recent_complete_commits(args, cutoff);
710 trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL);
713 * Mark all complete remote refs as common refs.
714 * Don't mark them common yet; the server has to be told so first.
716 trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL);
717 for (ref = *refs; ref; ref = ref->next) {
718 struct object *o = deref_tag(the_repository,
719 lookup_object(the_repository,
723 if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
726 negotiator->known_common(negotiator,
729 trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL);
731 save_commit_buffer = old_save_commit_buffer;
735 * Returns 1 if every object pointed to by the given remote refs is available
736 * locally and reachable from a local ref, and 0 otherwise.
738 static int everything_local(struct fetch_pack_args *args,
744 for (retval = 1, ref = *refs; ref ; ref = ref->next) {
745 const struct object_id *remote = &ref->old_oid;
748 o = lookup_object(the_repository, remote);
749 if (!o || !(o->flags & COMPLETE)) {
751 print_verbose(args, "want %s (%s)", oid_to_hex(remote),
755 print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
762 static int sideband_demux(int in, int out, void *data)
767 ret = recv_sideband("fetch-pack", xd[0], out);
772 static void write_promisor_file(const char *keep_name,
773 struct ref **sought, int nr_sought)
775 struct strbuf promisor_name = STRBUF_INIT;
780 strbuf_addstr(&promisor_name, keep_name);
781 suffix_stripped = strbuf_strip_suffix(&promisor_name, ".keep");
782 if (!suffix_stripped)
783 BUG("name of pack lockfile should end with .keep (was '%s')",
785 strbuf_addstr(&promisor_name, ".promisor");
787 output = xfopen(promisor_name.buf, "w");
788 for (i = 0; i < nr_sought; i++)
789 fprintf(output, "%s %s\n", oid_to_hex(&sought[i]->old_oid),
793 strbuf_release(&promisor_name);
796 static int get_pack(struct fetch_pack_args *args,
797 int xd[2], struct string_list *pack_lockfiles,
798 struct ref **sought, int nr_sought)
801 int do_keep = args->keep_pack;
802 const char *cmd_name;
803 struct pack_header header;
805 struct child_process cmd = CHILD_PROCESS_INIT;
808 memset(&demux, 0, sizeof(demux));
810 /* xd[] is talking with upload-pack; subprocess reads from
811 * xd[0], spits out band#2 to stderr, and feeds us band#1
812 * through demux->out.
814 demux.proc = sideband_demux;
817 demux.isolate_sigpipe = 1;
818 if (start_async(&demux))
819 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
824 if (!args->keep_pack && unpack_limit) {
826 if (read_pack_header(demux.out, &header))
827 die(_("protocol error: bad pack header"));
829 if (ntohl(header.hdr_entries) < unpack_limit)
835 if (alternate_shallow_file) {
836 argv_array_push(&cmd.args, "--shallow-file");
837 argv_array_push(&cmd.args, alternate_shallow_file);
840 if (do_keep || args->from_promisor) {
843 cmd_name = "index-pack";
844 argv_array_push(&cmd.args, cmd_name);
845 argv_array_push(&cmd.args, "--stdin");
846 if (!args->quiet && !args->no_progress)
847 argv_array_push(&cmd.args, "-v");
848 if (args->use_thin_pack)
849 argv_array_push(&cmd.args, "--fix-thin");
850 if (do_keep && (args->lock_pack || unpack_limit)) {
851 char hostname[HOST_NAME_MAX + 1];
852 if (xgethostname(hostname, sizeof(hostname)))
853 xsnprintf(hostname, sizeof(hostname), "localhost");
854 argv_array_pushf(&cmd.args,
855 "--keep=fetch-pack %"PRIuMAX " on %s",
856 (uintmax_t)getpid(), hostname);
858 if (args->check_self_contained_and_connected)
859 argv_array_push(&cmd.args, "--check-self-contained-and-connected");
861 * If we're obtaining the filename of a lockfile, we'll use
862 * that filename to write a .promisor file with more
863 * information below. If not, we need index-pack to do it for
866 if (!(do_keep && pack_lockfiles) && args->from_promisor)
867 argv_array_push(&cmd.args, "--promisor");
870 cmd_name = "unpack-objects";
871 argv_array_push(&cmd.args, cmd_name);
872 if (args->quiet || args->no_progress)
873 argv_array_push(&cmd.args, "-q");
874 args->check_self_contained_and_connected = 0;
878 argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
879 ntohl(header.hdr_version),
880 ntohl(header.hdr_entries));
881 if (fetch_fsck_objects >= 0
883 : transfer_fsck_objects >= 0
884 ? transfer_fsck_objects
886 if (args->from_promisor)
888 * We cannot use --strict in index-pack because it
889 * checks both broken objects and links, but we only
890 * want to check for broken objects.
892 argv_array_push(&cmd.args, "--fsck-objects");
894 argv_array_pushf(&cmd.args, "--strict%s",
900 if (start_command(&cmd))
901 die(_("fetch-pack: unable to fork off %s"), cmd_name);
902 if (do_keep && pack_lockfiles) {
903 string_list_append_nodup(pack_lockfiles,
904 index_pack_lockfile(cmd.out));
909 /* Closed by start_command() */
912 ret = finish_command(&cmd);
913 if (!ret || (args->check_self_contained_and_connected && ret == 1))
914 args->self_contained_and_connected =
915 args->check_self_contained_and_connected &&
918 die(_("%s failed"), cmd_name);
919 if (use_sideband && finish_async(&demux))
920 die(_("error in sideband demultiplexer"));
923 * Now that index-pack has succeeded, write the promisor file using the
924 * obtained .keep filename if necessary
926 if (do_keep && pack_lockfiles && pack_lockfiles->nr && args->from_promisor)
927 write_promisor_file(pack_lockfiles->items[0].string, sought, nr_sought);
932 static int cmp_ref_by_name(const void *a_, const void *b_)
934 const struct ref *a = *((const struct ref **)a_);
935 const struct ref *b = *((const struct ref **)b_);
936 return strcmp(a->name, b->name);
939 static struct ref *do_fetch_pack(struct fetch_pack_args *args,
941 const struct ref *orig_ref,
942 struct ref **sought, int nr_sought,
943 struct shallow_info *si,
944 struct string_list *pack_lockfiles)
946 struct repository *r = the_repository;
947 struct ref *ref = copy_ref_list(orig_ref);
948 struct object_id oid;
949 const char *agent_feature;
951 struct fetch_negotiator negotiator_alloc;
952 struct fetch_negotiator *negotiator;
954 if (args->no_dependents) {
957 negotiator = &negotiator_alloc;
958 fetch_negotiator_init(r, negotiator);
961 sort_ref_list(&ref, ref_compare_name);
962 QSORT(sought, nr_sought, cmp_ref_by_name);
964 if ((agent_feature = server_feature_value("agent", &agent_len))) {
967 print_verbose(args, _("Server version is %.*s"),
968 agent_len, agent_feature);
971 if (server_supports("shallow"))
972 print_verbose(args, _("Server supports %s"), "shallow");
973 else if (args->depth > 0 || is_repository_shallow(r))
974 die(_("Server does not support shallow clients"));
975 if (args->depth > 0 || args->deepen_since || args->deepen_not)
977 if (server_supports("multi_ack_detailed")) {
978 print_verbose(args, _("Server supports %s"), "multi_ack_detailed");
980 if (server_supports("no-done")) {
981 print_verbose(args, _("Server supports %s"), "no-done");
982 if (args->stateless_rpc)
986 else if (server_supports("multi_ack")) {
987 print_verbose(args, _("Server supports %s"), "multi_ack");
990 if (server_supports("side-band-64k")) {
991 print_verbose(args, _("Server supports %s"), "side-band-64k");
994 else if (server_supports("side-band")) {
995 print_verbose(args, _("Server supports %s"), "side-band");
998 if (server_supports("allow-tip-sha1-in-want")) {
999 print_verbose(args, _("Server supports %s"), "allow-tip-sha1-in-want");
1000 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1002 if (server_supports("allow-reachable-sha1-in-want")) {
1003 print_verbose(args, _("Server supports %s"), "allow-reachable-sha1-in-want");
1004 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1006 if (server_supports("thin-pack"))
1007 print_verbose(args, _("Server supports %s"), "thin-pack");
1009 args->use_thin_pack = 0;
1010 if (server_supports("no-progress"))
1011 print_verbose(args, _("Server supports %s"), "no-progress");
1013 args->no_progress = 0;
1014 if (server_supports("include-tag"))
1015 print_verbose(args, _("Server supports %s"), "include-tag");
1017 args->include_tag = 0;
1018 if (server_supports("ofs-delta"))
1019 print_verbose(args, _("Server supports %s"), "ofs-delta");
1021 prefer_ofs_delta = 0;
1023 if (server_supports("filter")) {
1024 server_supports_filtering = 1;
1025 print_verbose(args, _("Server supports %s"), "filter");
1026 } else if (args->filter_options.choice) {
1027 warning("filtering not recognized by server, ignoring");
1030 if (server_supports("deepen-since")) {
1031 print_verbose(args, _("Server supports %s"), "deepen-since");
1032 deepen_since_ok = 1;
1033 } else if (args->deepen_since)
1034 die(_("Server does not support --shallow-since"));
1035 if (server_supports("deepen-not")) {
1036 print_verbose(args, _("Server supports %s"), "deepen-not");
1038 } else if (args->deepen_not)
1039 die(_("Server does not support --shallow-exclude"));
1040 if (server_supports("deepen-relative"))
1041 print_verbose(args, _("Server supports %s"), "deepen-relative");
1042 else if (args->deepen_relative)
1043 die(_("Server does not support --deepen"));
1045 if (!args->no_dependents) {
1046 mark_complete_and_common_ref(negotiator, args, &ref);
1047 filter_refs(args, &ref, sought, nr_sought);
1048 if (everything_local(args, &ref)) {
1049 packet_flush(fd[1]);
1053 filter_refs(args, &ref, sought, nr_sought);
1055 if (find_common(negotiator, args, fd, &oid, ref) < 0)
1056 if (!args->keep_pack)
1057 /* When cloning, it is not unusual to have
1060 warning(_("no common commits"));
1062 if (args->stateless_rpc)
1063 packet_flush(fd[1]);
1065 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1067 else if (si->nr_ours || si->nr_theirs)
1068 alternate_shallow_file = setup_temporary_shallow(si->shallow);
1070 alternate_shallow_file = NULL;
1071 if (get_pack(args, fd, pack_lockfiles, sought, nr_sought))
1072 die(_("git fetch-pack: fetch failed."));
1076 negotiator->release(negotiator);
1080 static void add_shallow_requests(struct strbuf *req_buf,
1081 const struct fetch_pack_args *args)
1083 if (is_repository_shallow(the_repository))
1084 write_shallow_commits(req_buf, 1, NULL);
1085 if (args->depth > 0)
1086 packet_buf_write(req_buf, "deepen %d", args->depth);
1087 if (args->deepen_since) {
1088 timestamp_t max_age = approxidate(args->deepen_since);
1089 packet_buf_write(req_buf, "deepen-since %"PRItime, max_age);
1091 if (args->deepen_not) {
1093 for (i = 0; i < args->deepen_not->nr; i++) {
1094 struct string_list_item *s = args->deepen_not->items + i;
1095 packet_buf_write(req_buf, "deepen-not %s", s->string);
1098 if (args->deepen_relative)
1099 packet_buf_write(req_buf, "deepen-relative\n");
1102 static void add_wants(int no_dependents, const struct ref *wants, struct strbuf *req_buf)
1104 int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0);
1106 for ( ; wants ; wants = wants->next) {
1107 const struct object_id *remote = &wants->old_oid;
1111 * If that object is complete (i.e. it is an ancestor of a
1112 * local ref), we tell them we have it but do not have to
1113 * tell them about its ancestors, which they already know
1116 * We use lookup_object here because we are only
1117 * interested in the case we *know* the object is
1118 * reachable and we have already scanned it.
1120 * Do this only if args->no_dependents is false (if it is true,
1121 * we cannot trust the object flags).
1123 if (!no_dependents &&
1124 ((o = lookup_object(the_repository, remote)) != NULL) &&
1125 (o->flags & COMPLETE)) {
1129 if (!use_ref_in_want || wants->exact_oid)
1130 packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote));
1132 packet_buf_write(req_buf, "want-ref %s\n", wants->name);
1136 static void add_common(struct strbuf *req_buf, struct oidset *common)
1138 struct oidset_iter iter;
1139 const struct object_id *oid;
1140 oidset_iter_init(common, &iter);
1142 while ((oid = oidset_iter_next(&iter))) {
1143 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1147 static int add_haves(struct fetch_negotiator *negotiator,
1149 struct strbuf *req_buf,
1150 int *haves_to_send, int *in_vain)
1153 int haves_added = 0;
1154 const struct object_id *oid;
1156 while ((oid = negotiator->next(negotiator))) {
1157 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1158 if (++haves_added >= *haves_to_send)
1162 *in_vain += haves_added;
1163 if (!haves_added || (seen_ack && *in_vain >= MAX_IN_VAIN)) {
1165 packet_buf_write(req_buf, "done\n");
1169 /* Increase haves to send on next round */
1170 *haves_to_send = next_flush(1, *haves_to_send);
1175 static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out,
1176 struct fetch_pack_args *args,
1177 const struct ref *wants, struct oidset *common,
1178 int *haves_to_send, int *in_vain,
1179 int sideband_all, int seen_ack)
1182 struct strbuf req_buf = STRBUF_INIT;
1184 if (server_supports_v2("fetch", 1))
1185 packet_buf_write(&req_buf, "command=fetch");
1186 if (server_supports_v2("agent", 0))
1187 packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
1188 if (args->server_options && args->server_options->nr &&
1189 server_supports_v2("server-option", 1)) {
1191 for (i = 0; i < args->server_options->nr; i++)
1192 packet_buf_write(&req_buf, "server-option=%s",
1193 args->server_options->items[i].string);
1196 packet_buf_delim(&req_buf);
1197 if (args->use_thin_pack)
1198 packet_buf_write(&req_buf, "thin-pack");
1199 if (args->no_progress)
1200 packet_buf_write(&req_buf, "no-progress");
1201 if (args->include_tag)
1202 packet_buf_write(&req_buf, "include-tag");
1203 if (prefer_ofs_delta)
1204 packet_buf_write(&req_buf, "ofs-delta");
1206 packet_buf_write(&req_buf, "sideband-all");
1208 /* Add shallow-info and deepen request */
1209 if (server_supports_feature("fetch", "shallow", 0))
1210 add_shallow_requests(&req_buf, args);
1211 else if (is_repository_shallow(the_repository) || args->deepen)
1212 die(_("Server does not support shallow requests"));
1215 if (server_supports_feature("fetch", "filter", 0) &&
1216 args->filter_options.choice) {
1218 expand_list_objects_filter_spec(&args->filter_options);
1219 print_verbose(args, _("Server supports filter"));
1220 packet_buf_write(&req_buf, "filter %s", spec);
1221 } else if (args->filter_options.choice) {
1222 warning("filtering not recognized by server, ignoring");
1226 add_wants(args->no_dependents, wants, &req_buf);
1228 if (args->no_dependents) {
1229 packet_buf_write(&req_buf, "done");
1232 /* Add all of the common commits we've found in previous rounds */
1233 add_common(&req_buf, common);
1235 /* Add initial haves */
1236 ret = add_haves(negotiator, seen_ack, &req_buf,
1237 haves_to_send, in_vain);
1241 packet_buf_flush(&req_buf);
1242 if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0)
1243 die_errno(_("unable to write request to remote"));
1245 strbuf_release(&req_buf);
1250 * Processes a section header in a server's response and checks if it matches
1251 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1252 * not consumed); if 0, the line will be consumed and the function will die if
1253 * the section header doesn't match what was expected.
1255 static int process_section_header(struct packet_reader *reader,
1256 const char *section, int peek)
1260 if (packet_reader_peek(reader) != PACKET_READ_NORMAL)
1261 die(_("error reading section header '%s'"), section);
1263 ret = !strcmp(reader->line, section);
1267 die(_("expected '%s', received '%s'"),
1268 section, reader->line);
1269 packet_reader_read(reader);
1277 * No commit was found to be possessed by both the client and the
1278 * server, and "ready" was not received.
1283 * At least one commit was found to be possessed by both the client and
1284 * the server, and "ready" was not received.
1289 * "ready" was received, indicating that the server is ready to send
1290 * the packfile without any further negotiation.
1295 static enum common_found process_acks(struct fetch_negotiator *negotiator,
1296 struct packet_reader *reader,
1297 struct oidset *common)
1300 int received_ready = 0;
1301 int received_ack = 0;
1303 process_section_header(reader, "acknowledgments", 0);
1304 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1307 if (!strcmp(reader->line, "NAK"))
1310 if (skip_prefix(reader->line, "ACK ", &arg)) {
1311 struct object_id oid;
1313 if (!get_oid_hex(arg, &oid)) {
1314 struct commit *commit;
1315 oidset_insert(common, &oid);
1316 commit = lookup_commit(the_repository, &oid);
1318 negotiator->ack(negotiator, commit);
1323 if (!strcmp(reader->line, "ready")) {
1328 die(_("unexpected acknowledgment line: '%s'"), reader->line);
1331 if (reader->status != PACKET_READ_FLUSH &&
1332 reader->status != PACKET_READ_DELIM)
1333 die(_("error processing acks: %d"), reader->status);
1336 * If an "acknowledgments" section is sent, a packfile is sent if and
1337 * only if "ready" was sent in this section. The other sections
1338 * ("shallow-info" and "wanted-refs") are sent only if a packfile is
1339 * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH
1342 if (received_ready && reader->status != PACKET_READ_DELIM)
1343 die(_("expected packfile to be sent after 'ready'"));
1344 if (!received_ready && reader->status != PACKET_READ_FLUSH)
1345 die(_("expected no other sections to be sent after no 'ready'"));
1347 return received_ready ? READY :
1348 (received_ack ? COMMON_FOUND : NO_COMMON_FOUND);
1351 static void receive_shallow_info(struct fetch_pack_args *args,
1352 struct packet_reader *reader,
1353 struct oid_array *shallows,
1354 struct shallow_info *si)
1356 int unshallow_received = 0;
1358 process_section_header(reader, "shallow-info", 0);
1359 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1361 struct object_id oid;
1363 if (skip_prefix(reader->line, "shallow ", &arg)) {
1364 if (get_oid_hex(arg, &oid))
1365 die(_("invalid shallow line: %s"), reader->line);
1366 oid_array_append(shallows, &oid);
1369 if (skip_prefix(reader->line, "unshallow ", &arg)) {
1370 if (get_oid_hex(arg, &oid))
1371 die(_("invalid unshallow line: %s"), reader->line);
1372 if (!lookup_object(the_repository, &oid))
1373 die(_("object not found: %s"), reader->line);
1374 /* make sure that it is parsed as shallow */
1375 if (!parse_object(the_repository, &oid))
1376 die(_("error in object: %s"), reader->line);
1377 if (unregister_shallow(&oid))
1378 die(_("no shallow found: %s"), reader->line);
1379 unshallow_received = 1;
1382 die(_("expected shallow/unshallow, got %s"), reader->line);
1385 if (reader->status != PACKET_READ_FLUSH &&
1386 reader->status != PACKET_READ_DELIM)
1387 die(_("error processing shallow info: %d"), reader->status);
1389 if (args->deepen || unshallow_received) {
1391 * Treat these as shallow lines caused by our depth settings.
1392 * In v0, these lines cannot cause refs to be rejected; do the
1397 for (i = 0; i < shallows->nr; i++)
1398 register_shallow(the_repository, &shallows->oid[i]);
1399 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1402 } else if (shallows->nr) {
1404 * Treat these as shallow lines caused by the remote being
1405 * shallow. In v0, remote refs that reach these objects are
1406 * rejected (unless --update-shallow is set); do the same.
1408 prepare_shallow_info(si, shallows);
1409 if (si->nr_ours || si->nr_theirs)
1410 alternate_shallow_file =
1411 setup_temporary_shallow(si->shallow);
1413 alternate_shallow_file = NULL;
1415 alternate_shallow_file = NULL;
1419 static int cmp_name_ref(const void *name, const void *ref)
1421 return strcmp(name, (*(struct ref **)ref)->name);
1424 static void receive_wanted_refs(struct packet_reader *reader,
1425 struct ref **sought, int nr_sought)
1427 process_section_header(reader, "wanted-refs", 0);
1428 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1429 struct object_id oid;
1433 if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ')
1434 die(_("expected wanted-ref, got '%s'"), reader->line);
1436 found = bsearch(end, sought, nr_sought, sizeof(*sought),
1439 die(_("unexpected wanted-ref: '%s'"), reader->line);
1440 oidcpy(&(*found)->old_oid, &oid);
1443 if (reader->status != PACKET_READ_DELIM)
1444 die(_("error processing wanted refs: %d"), reader->status);
1448 FETCH_CHECK_LOCAL = 0,
1455 static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
1457 const struct ref *orig_ref,
1458 struct ref **sought, int nr_sought,
1459 struct oid_array *shallows,
1460 struct shallow_info *si,
1461 struct string_list *pack_lockfiles)
1463 struct repository *r = the_repository;
1464 struct ref *ref = copy_ref_list(orig_ref);
1465 enum fetch_state state = FETCH_CHECK_LOCAL;
1466 struct oidset common = OIDSET_INIT;
1467 struct packet_reader reader;
1468 int in_vain = 0, negotiation_started = 0;
1469 int haves_to_send = INITIAL_FLUSH;
1470 struct fetch_negotiator negotiator_alloc;
1471 struct fetch_negotiator *negotiator;
1474 if (args->no_dependents) {
1477 negotiator = &negotiator_alloc;
1478 fetch_negotiator_init(r, negotiator);
1481 packet_reader_init(&reader, fd[0], NULL, 0,
1482 PACKET_READ_CHOMP_NEWLINE |
1483 PACKET_READ_DIE_ON_ERR_PACKET);
1484 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) &&
1485 server_supports_feature("fetch", "sideband-all", 0)) {
1486 reader.use_sideband = 1;
1487 reader.me = "fetch-pack";
1490 while (state != FETCH_DONE) {
1492 case FETCH_CHECK_LOCAL:
1493 sort_ref_list(&ref, ref_compare_name);
1494 QSORT(sought, nr_sought, cmp_ref_by_name);
1496 /* v2 supports these by default */
1497 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1499 if (args->depth > 0 || args->deepen_since || args->deepen_not)
1502 /* Filter 'ref' by 'sought' and those that aren't local */
1503 if (!args->no_dependents) {
1504 mark_complete_and_common_ref(negotiator, args, &ref);
1505 filter_refs(args, &ref, sought, nr_sought);
1506 if (everything_local(args, &ref))
1509 state = FETCH_SEND_REQUEST;
1511 mark_tips(negotiator, args->negotiation_tips);
1512 for_each_cached_alternate(negotiator,
1513 insert_one_alternate_object);
1515 filter_refs(args, &ref, sought, nr_sought);
1516 state = FETCH_SEND_REQUEST;
1519 case FETCH_SEND_REQUEST:
1520 if (!negotiation_started) {
1521 negotiation_started = 1;
1522 trace2_region_enter("fetch-pack",
1526 if (send_fetch_request(negotiator, fd[1], args, ref,
1528 &haves_to_send, &in_vain,
1529 reader.use_sideband,
1531 state = FETCH_GET_PACK;
1533 state = FETCH_PROCESS_ACKS;
1535 case FETCH_PROCESS_ACKS:
1536 /* Process ACKs/NAKs */
1537 switch (process_acks(negotiator, &reader, &common)) {
1539 state = FETCH_GET_PACK;
1545 case NO_COMMON_FOUND:
1546 state = FETCH_SEND_REQUEST;
1550 case FETCH_GET_PACK:
1551 trace2_region_leave("fetch-pack",
1554 /* Check for shallow-info section */
1555 if (process_section_header(&reader, "shallow-info", 1))
1556 receive_shallow_info(args, &reader, shallows, si);
1558 if (process_section_header(&reader, "wanted-refs", 1))
1559 receive_wanted_refs(&reader, sought, nr_sought);
1562 process_section_header(&reader, "packfile", 0);
1563 if (get_pack(args, fd, pack_lockfiles, sought, nr_sought))
1564 die(_("git fetch-pack: fetch failed."));
1574 negotiator->release(negotiator);
1575 oidset_clear(&common);
1579 static int fetch_pack_config_cb(const char *var, const char *value, void *cb)
1581 if (strcmp(var, "fetch.fsck.skiplist") == 0) {
1584 if (git_config_pathname(&path, var, value))
1586 strbuf_addf(&fsck_msg_types, "%cskiplist=%s",
1587 fsck_msg_types.len ? ',' : '=', path);
1592 if (skip_prefix(var, "fetch.fsck.", &var)) {
1593 if (is_valid_msg_type(var, value))
1594 strbuf_addf(&fsck_msg_types, "%c%s=%s",
1595 fsck_msg_types.len ? ',' : '=', var, value);
1597 warning("Skipping unknown msg id '%s'", var);
1601 return git_default_config(var, value, cb);
1604 static void fetch_pack_config(void)
1606 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
1607 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
1608 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
1609 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
1610 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
1612 git_config(fetch_pack_config_cb, NULL);
1615 static void fetch_pack_setup(void)
1617 static int did_setup;
1620 fetch_pack_config();
1621 if (0 <= transfer_unpack_limit)
1622 unpack_limit = transfer_unpack_limit;
1623 else if (0 <= fetch_unpack_limit)
1624 unpack_limit = fetch_unpack_limit;
1628 static int remove_duplicates_in_refs(struct ref **ref, int nr)
1630 struct string_list names = STRING_LIST_INIT_NODUP;
1633 for (src = dst = 0; src < nr; src++) {
1634 struct string_list_item *item;
1635 item = string_list_insert(&names, ref[src]->name);
1637 continue; /* already have it */
1638 item->util = ref[src];
1640 ref[dst] = ref[src];
1643 for (src = dst; src < nr; src++)
1645 string_list_clear(&names, 0);
1649 static void update_shallow(struct fetch_pack_args *args,
1650 struct ref **sought, int nr_sought,
1651 struct shallow_info *si)
1653 struct oid_array ref = OID_ARRAY_INIT;
1657 if (args->deepen && alternate_shallow_file) {
1658 if (*alternate_shallow_file == '\0') { /* --unshallow */
1659 unlink_or_warn(git_path_shallow(the_repository));
1660 rollback_shallow_file(the_repository, &shallow_lock);
1662 commit_shallow_file(the_repository, &shallow_lock);
1663 alternate_shallow_file = NULL;
1667 if (!si->shallow || !si->shallow->nr)
1670 if (args->cloning) {
1672 * remote is shallow, but this is a clone, there are
1673 * no objects in repo to worry about. Accept any
1674 * shallow points that exist in the pack (iow in repo
1675 * after get_pack() and reprepare_packed_git())
1677 struct oid_array extra = OID_ARRAY_INIT;
1678 struct object_id *oid = si->shallow->oid;
1679 for (i = 0; i < si->shallow->nr; i++)
1680 if (has_object_file(&oid[i]))
1681 oid_array_append(&extra, &oid[i]);
1683 setup_alternate_shallow(&shallow_lock,
1684 &alternate_shallow_file,
1686 commit_shallow_file(the_repository, &shallow_lock);
1687 alternate_shallow_file = NULL;
1689 oid_array_clear(&extra);
1693 if (!si->nr_ours && !si->nr_theirs)
1696 remove_nonexistent_theirs_shallow(si);
1697 if (!si->nr_ours && !si->nr_theirs)
1699 for (i = 0; i < nr_sought; i++)
1700 oid_array_append(&ref, &sought[i]->old_oid);
1703 if (args->update_shallow) {
1705 * remote is also shallow, .git/shallow may be updated
1706 * so all refs can be accepted. Make sure we only add
1707 * shallow roots that are actually reachable from new
1710 struct oid_array extra = OID_ARRAY_INIT;
1711 struct object_id *oid = si->shallow->oid;
1712 assign_shallow_commits_to_refs(si, NULL, NULL);
1713 if (!si->nr_ours && !si->nr_theirs) {
1714 oid_array_clear(&ref);
1717 for (i = 0; i < si->nr_ours; i++)
1718 oid_array_append(&extra, &oid[si->ours[i]]);
1719 for (i = 0; i < si->nr_theirs; i++)
1720 oid_array_append(&extra, &oid[si->theirs[i]]);
1721 setup_alternate_shallow(&shallow_lock,
1722 &alternate_shallow_file,
1724 commit_shallow_file(the_repository, &shallow_lock);
1725 oid_array_clear(&extra);
1726 oid_array_clear(&ref);
1727 alternate_shallow_file = NULL;
1732 * remote is also shallow, check what ref is safe to update
1733 * without updating .git/shallow
1735 status = xcalloc(nr_sought, sizeof(*status));
1736 assign_shallow_commits_to_refs(si, NULL, status);
1737 if (si->nr_ours || si->nr_theirs) {
1738 for (i = 0; i < nr_sought; i++)
1740 sought[i]->status = REF_STATUS_REJECT_SHALLOW;
1743 oid_array_clear(&ref);
1746 static int iterate_ref_map(void *cb_data, struct object_id *oid)
1748 struct ref **rm = cb_data;
1749 struct ref *ref = *rm;
1752 return -1; /* end of the list */
1754 oidcpy(oid, &ref->old_oid);
1758 struct ref *fetch_pack(struct fetch_pack_args *args,
1760 const struct ref *ref,
1761 struct ref **sought, int nr_sought,
1762 struct oid_array *shallow,
1763 struct string_list *pack_lockfiles,
1764 enum protocol_version version)
1766 struct ref *ref_cpy;
1767 struct shallow_info si;
1768 struct oid_array shallows_scratch = OID_ARRAY_INIT;
1772 nr_sought = remove_duplicates_in_refs(sought, nr_sought);
1774 if (args->no_dependents && !args->filter_options.choice) {
1776 * The protocol does not support requesting that only the
1777 * wanted objects be sent, so approximate this by setting a
1778 * "blob:none" filter if no filter is already set. This works
1779 * for all object types: note that wanted blobs will still be
1780 * sent because they are directly specified as a "want".
1782 * NEEDSWORK: Add an option in the protocol to request that
1783 * only the wanted objects be sent, and implement it.
1785 parse_list_objects_filter(&args->filter_options, "blob:none");
1788 if (version != protocol_v2 && !ref) {
1789 packet_flush(fd[1]);
1790 die(_("no matching remote head"));
1792 if (version == protocol_v2) {
1794 BUG("Protocol V2 does not provide shallows at this point in the fetch");
1795 memset(&si, 0, sizeof(si));
1796 ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
1797 &shallows_scratch, &si,
1800 prepare_shallow_info(&si, shallow);
1801 ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
1802 &si, pack_lockfiles);
1804 reprepare_packed_git(the_repository);
1806 if (!args->cloning && args->deepen) {
1807 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1808 struct ref *iterator = ref_cpy;
1809 opt.shallow_file = alternate_shallow_file;
1811 opt.is_deepening_fetch = 1;
1812 if (check_connected(iterate_ref_map, &iterator, &opt)) {
1813 error(_("remote did not send all necessary objects"));
1816 rollback_shallow_file(the_repository, &shallow_lock);
1819 args->connectivity_checked = 1;
1822 update_shallow(args, sought, nr_sought, &si);
1824 clear_shallow_info(&si);
1825 oid_array_clear(&shallows_scratch);
1829 int report_unmatched_refs(struct ref **sought, int nr_sought)
1833 for (i = 0; i < nr_sought; i++) {
1836 switch (sought[i]->match_status) {
1839 case REF_NOT_MATCHED:
1840 error(_("no such remote ref %s"), sought[i]->name);
1842 case REF_UNADVERTISED_NOT_ALLOWED:
1843 error(_("Server does not allow request for unadvertised object %s"),