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;
41 static struct string_list uri_protocols = STRING_LIST_INIT_DUP;
43 /* Remember to update object flag allocation in object.h */
44 #define COMPLETE (1U << 0)
45 #define ALTERNATE (1U << 1)
48 * After sending this many "have"s if we do not get any new ACK , we
49 * give up traversing our history.
51 #define MAX_IN_VAIN 256
53 static int multi_ack, use_sideband;
54 /* Allow specifying sha1 if it is a ref tip. */
55 #define ALLOW_TIP_SHA1 01
56 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
57 #define ALLOW_REACHABLE_SHA1 02
58 static unsigned int allow_unadvertised_object_request;
60 __attribute__((format (printf, 2, 3)))
61 static inline void print_verbose(const struct fetch_pack_args *args,
69 va_start(params, fmt);
70 vfprintf(stderr, fmt, params);
75 struct alternate_object_cache {
76 struct object **items;
80 static void cache_one_alternate(const struct object_id *oid,
83 struct alternate_object_cache *cache = vcache;
84 struct object *obj = parse_object(the_repository, oid);
86 if (!obj || (obj->flags & ALTERNATE))
89 obj->flags |= ALTERNATE;
90 ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
91 cache->items[cache->nr++] = obj;
94 static void for_each_cached_alternate(struct fetch_negotiator *negotiator,
95 void (*cb)(struct fetch_negotiator *,
98 static int initialized;
99 static struct alternate_object_cache cache;
103 for_each_alternate_ref(cache_one_alternate, &cache);
107 for (i = 0; i < cache.nr; i++)
108 cb(negotiator, cache.items[i]);
111 static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
113 const struct object_id *oid)
115 struct object *o = deref_tag(the_repository,
116 parse_object(the_repository, oid),
119 if (o && o->type == OBJ_COMMIT)
120 negotiator->add_tip(negotiator, (struct commit *)o);
125 static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
126 int flag, void *cb_data)
128 return rev_list_insert_ref(cb_data, refname, oid);
139 static void consume_shallow_list(struct fetch_pack_args *args,
140 struct packet_reader *reader)
142 if (args->stateless_rpc && args->deepen) {
143 /* If we sent a depth we will get back "duplicate"
144 * shallow and unshallow commands every time there
145 * is a block of have lines exchanged.
147 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
148 if (starts_with(reader->line, "shallow "))
150 if (starts_with(reader->line, "unshallow "))
152 die(_("git fetch-pack: expected shallow list"));
154 if (reader->status != PACKET_READ_FLUSH)
155 die(_("git fetch-pack: expected a flush packet after shallow list"));
159 static enum ack_type get_ack(struct packet_reader *reader,
160 struct object_id *result_oid)
165 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
166 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
167 len = reader->pktlen;
169 if (!strcmp(reader->line, "NAK"))
171 if (skip_prefix(reader->line, "ACK ", &arg)) {
173 if (!parse_oid_hex(arg, result_oid, &p)) {
174 len -= p - reader->line;
177 if (strstr(p, "continue"))
179 if (strstr(p, "common"))
181 if (strstr(p, "ready"))
186 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader->line);
189 static void send_request(struct fetch_pack_args *args,
190 int fd, struct strbuf *buf)
192 if (args->stateless_rpc) {
193 send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
196 if (write_in_full(fd, buf->buf, buf->len) < 0)
197 die_errno(_("unable to write to remote"));
201 static void insert_one_alternate_object(struct fetch_negotiator *negotiator,
204 rev_list_insert_ref(negotiator, NULL, &obj->oid);
207 #define INITIAL_FLUSH 16
208 #define PIPESAFE_FLUSH 32
209 #define LARGE_FLUSH 16384
211 static int next_flush(int stateless_rpc, int count)
214 if (count < LARGE_FLUSH)
217 count = count * 11 / 10;
219 if (count < PIPESAFE_FLUSH)
222 count += PIPESAFE_FLUSH;
227 static void mark_tips(struct fetch_negotiator *negotiator,
228 const struct oid_array *negotiation_tips)
232 if (!negotiation_tips) {
233 for_each_ref(rev_list_insert_ref_oid, negotiator);
237 for (i = 0; i < negotiation_tips->nr; i++)
238 rev_list_insert_ref(negotiator, NULL,
239 &negotiation_tips->oid[i]);
243 static int find_common(struct fetch_negotiator *negotiator,
244 struct fetch_pack_args *args,
245 int fd[2], struct object_id *result_oid,
249 int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
250 const struct object_id *oid;
251 unsigned in_vain = 0;
252 int got_continue = 0;
254 struct strbuf req_buf = STRBUF_INIT;
255 size_t state_len = 0;
256 struct packet_reader reader;
258 if (args->stateless_rpc && multi_ack == 1)
259 die(_("--stateless-rpc requires multi_ack_detailed"));
261 packet_reader_init(&reader, fd[0], NULL, 0,
262 PACKET_READ_CHOMP_NEWLINE |
263 PACKET_READ_DIE_ON_ERR_PACKET);
265 if (!args->no_dependents) {
266 mark_tips(negotiator, args->negotiation_tips);
267 for_each_cached_alternate(negotiator, insert_one_alternate_object);
271 for ( ; refs ; refs = refs->next) {
272 struct object_id *remote = &refs->old_oid;
273 const char *remote_hex;
277 * If that object is complete (i.e. it is an ancestor of a
278 * local ref), we tell them we have it but do not have to
279 * tell them about its ancestors, which they already know
282 * We use lookup_object here because we are only
283 * interested in the case we *know* the object is
284 * reachable and we have already scanned it.
286 * Do this only if args->no_dependents is false (if it is true,
287 * we cannot trust the object flags).
289 if (!args->no_dependents &&
290 ((o = lookup_object(the_repository, remote)) != NULL) &&
291 (o->flags & COMPLETE)) {
295 remote_hex = oid_to_hex(remote);
297 struct strbuf c = STRBUF_INIT;
298 if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
299 if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
300 if (no_done) strbuf_addstr(&c, " no-done");
301 if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
302 if (use_sideband == 1) strbuf_addstr(&c, " side-band");
303 if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
304 if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
305 if (args->no_progress) strbuf_addstr(&c, " no-progress");
306 if (args->include_tag) strbuf_addstr(&c, " include-tag");
307 if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
308 if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
309 if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
310 if (agent_supported) strbuf_addf(&c, " agent=%s",
311 git_user_agent_sanitized());
312 if (args->filter_options.choice)
313 strbuf_addstr(&c, " filter");
314 packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
317 packet_buf_write(&req_buf, "want %s\n", remote_hex);
322 strbuf_release(&req_buf);
327 if (is_repository_shallow(the_repository))
328 write_shallow_commits(&req_buf, 1, NULL);
330 packet_buf_write(&req_buf, "deepen %d", args->depth);
331 if (args->deepen_since) {
332 timestamp_t max_age = approxidate(args->deepen_since);
333 packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
335 if (args->deepen_not) {
337 for (i = 0; i < args->deepen_not->nr; i++) {
338 struct string_list_item *s = args->deepen_not->items + i;
339 packet_buf_write(&req_buf, "deepen-not %s", s->string);
342 if (server_supports_filtering && args->filter_options.choice) {
344 expand_list_objects_filter_spec(&args->filter_options);
345 packet_buf_write(&req_buf, "filter %s", spec);
347 packet_buf_flush(&req_buf);
348 state_len = req_buf.len;
352 struct object_id oid;
354 send_request(args, fd[1], &req_buf);
355 while (packet_reader_read(&reader) == PACKET_READ_NORMAL) {
356 if (skip_prefix(reader.line, "shallow ", &arg)) {
357 if (get_oid_hex(arg, &oid))
358 die(_("invalid shallow line: %s"), reader.line);
359 register_shallow(the_repository, &oid);
362 if (skip_prefix(reader.line, "unshallow ", &arg)) {
363 if (get_oid_hex(arg, &oid))
364 die(_("invalid unshallow line: %s"), reader.line);
365 if (!lookup_object(the_repository, &oid))
366 die(_("object not found: %s"), reader.line);
367 /* make sure that it is parsed as shallow */
368 if (!parse_object(the_repository, &oid))
369 die(_("error in object: %s"), reader.line);
370 if (unregister_shallow(&oid))
371 die(_("no shallow found: %s"), reader.line);
374 die(_("expected shallow/unshallow, got %s"), reader.line);
376 } else if (!args->stateless_rpc)
377 send_request(args, fd[1], &req_buf);
379 if (!args->stateless_rpc) {
380 /* If we aren't using the stateless-rpc interface
381 * we don't need to retain the headers.
383 strbuf_setlen(&req_buf, 0);
387 trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository);
390 if (args->no_dependents)
392 while ((oid = negotiator->next(negotiator))) {
393 packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
394 print_verbose(args, "have %s", oid_to_hex(oid));
396 if (flush_at <= ++count) {
399 packet_buf_flush(&req_buf);
400 send_request(args, fd[1], &req_buf);
401 strbuf_setlen(&req_buf, state_len);
403 flush_at = next_flush(args->stateless_rpc, count);
406 * We keep one window "ahead" of the other side, and
407 * will wait for an ACK only on the next one
409 if (!args->stateless_rpc && count == INITIAL_FLUSH)
412 consume_shallow_list(args, &reader);
414 ack = get_ack(&reader, result_oid);
416 print_verbose(args, _("got %s %d %s"), "ack",
417 ack, oid_to_hex(result_oid));
427 struct commit *commit =
428 lookup_commit(the_repository,
433 die(_("invalid commit %s"), oid_to_hex(result_oid));
434 was_common = negotiator->ack(negotiator, commit);
435 if (args->stateless_rpc
438 /* We need to replay the have for this object
439 * on the next RPC request so the peer knows
440 * it is in common with us.
442 const char *hex = oid_to_hex(result_oid);
443 packet_buf_write(&req_buf, "have %s\n", hex);
444 state_len = req_buf.len;
446 * Reset in_vain because an ack
447 * for this commit has not been
451 } else if (!args->stateless_rpc
452 || ack != ACK_common)
456 if (ack == ACK_ready)
463 if (got_continue && MAX_IN_VAIN < in_vain) {
464 print_verbose(args, _("giving up"));
472 trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository);
473 if (!got_ready || !no_done) {
474 packet_buf_write(&req_buf, "done\n");
475 send_request(args, fd[1], &req_buf);
477 print_verbose(args, _("done"));
482 strbuf_release(&req_buf);
484 if (!got_ready || !no_done)
485 consume_shallow_list(args, &reader);
486 while (flushes || multi_ack) {
487 int ack = get_ack(&reader, result_oid);
489 print_verbose(args, _("got %s (%d) %s"), "ack",
490 ack, oid_to_hex(result_oid));
498 /* it is no error to fetch into a completely empty repo */
499 return count ? retval : 0;
502 static struct commit_list *complete;
504 static int mark_complete(const struct object_id *oid)
506 struct object *o = parse_object(the_repository, oid);
508 while (o && o->type == OBJ_TAG) {
509 struct tag *t = (struct tag *) o;
511 break; /* broken repository */
512 o->flags |= COMPLETE;
513 o = parse_object(the_repository, &t->tagged->oid);
515 if (o && o->type == OBJ_COMMIT) {
516 struct commit *commit = (struct commit *)o;
517 if (!(commit->object.flags & COMPLETE)) {
518 commit->object.flags |= COMPLETE;
519 commit_list_insert(commit, &complete);
525 static int mark_complete_oid(const char *refname, const struct object_id *oid,
526 int flag, void *cb_data)
528 return mark_complete(oid);
531 static void mark_recent_complete_commits(struct fetch_pack_args *args,
534 while (complete && cutoff <= complete->item->date) {
535 print_verbose(args, _("Marking %s as complete"),
536 oid_to_hex(&complete->item->object.oid));
537 pop_most_recent_commit(&complete, COMPLETE);
541 static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
543 for (; refs; refs = refs->next)
544 oidset_insert(oids, &refs->old_oid);
547 static int is_unmatched_ref(const struct ref *ref)
549 struct object_id oid;
551 return ref->match_status == REF_NOT_MATCHED &&
552 !parse_oid_hex(ref->name, &oid, &p) &&
554 oideq(&oid, &ref->old_oid);
557 static void filter_refs(struct fetch_pack_args *args,
559 struct ref **sought, int nr_sought)
561 struct ref *newlist = NULL;
562 struct ref **newtail = &newlist;
563 struct ref *unmatched = NULL;
564 struct ref *ref, *next;
565 struct oidset tip_oids = OIDSET_INIT;
567 int strict = !(allow_unadvertised_object_request &
568 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
571 for (ref = *refs; ref; ref = next) {
575 if (starts_with(ref->name, "refs/") &&
576 check_refname_format(ref->name, 0)) {
578 * trash or a peeled value; do not even add it to
584 while (i < nr_sought) {
585 int cmp = strcmp(ref->name, sought[i]->name);
587 break; /* definitely do not have it */
589 keep = 1; /* definitely have it */
590 sought[i]->match_status = REF_MATCHED;
595 if (!keep && args->fetch_all &&
596 (!args->deepen || !starts_with(ref->name, "refs/tags/")))
603 newtail = &ref->next;
605 ref->next = unmatched;
611 for (i = 0; i < nr_sought; i++) {
613 if (!is_unmatched_ref(ref))
616 add_refs_to_oidset(&tip_oids, unmatched);
617 add_refs_to_oidset(&tip_oids, newlist);
622 /* Append unmatched requests to the list */
623 for (i = 0; i < nr_sought; i++) {
625 if (!is_unmatched_ref(ref))
628 if (!strict || oidset_contains(&tip_oids, &ref->old_oid)) {
629 ref->match_status = REF_MATCHED;
630 *newtail = copy_ref(ref);
631 newtail = &(*newtail)->next;
633 ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
637 oidset_clear(&tip_oids);
638 free_refs(unmatched);
643 static void mark_alternate_complete(struct fetch_negotiator *unused,
646 mark_complete(&obj->oid);
649 struct loose_object_iter {
650 struct oidset *loose_object_set;
655 * Mark recent commits available locally and reachable from a local ref as
656 * COMPLETE. If args->no_dependents is false, also mark COMPLETE remote refs as
657 * COMMON_REF (otherwise, we are not planning to participate in negotiation, and
658 * thus do not need COMMON_REF marks).
660 * The cutoff time for recency is determined by this heuristic: it is the
661 * earliest commit time of the objects in refs that are commits and that we know
662 * the commit time of.
664 static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
665 struct fetch_pack_args *args,
669 int old_save_commit_buffer = save_commit_buffer;
670 timestamp_t cutoff = 0;
672 save_commit_buffer = 0;
674 trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
675 for (ref = *refs; ref; ref = ref->next) {
678 if (!has_object_file_with_flags(&ref->old_oid,
680 OBJECT_INFO_SKIP_FETCH_OBJECT))
682 o = parse_object(the_repository, &ref->old_oid);
687 * We already have it -- which may mean that we were
688 * in sync with the other side at some time after
689 * that (it is OK if we guess wrong here).
691 if (o->type == OBJ_COMMIT) {
692 struct commit *commit = (struct commit *)o;
693 if (!cutoff || cutoff < commit->date)
694 cutoff = commit->date;
697 trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
700 * This block marks all local refs as COMPLETE, and then recursively marks all
701 * parents of those refs as COMPLETE.
703 trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL);
705 for_each_ref(mark_complete_oid, NULL);
706 for_each_cached_alternate(NULL, mark_alternate_complete);
707 commit_list_sort_by_date(&complete);
709 mark_recent_complete_commits(args, cutoff);
711 trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL);
714 * Mark all complete remote refs as common refs.
715 * Don't mark them common yet; the server has to be told so first.
717 trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL);
718 for (ref = *refs; ref; ref = ref->next) {
719 struct object *o = deref_tag(the_repository,
720 lookup_object(the_repository,
724 if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
727 negotiator->known_common(negotiator,
730 trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL);
732 save_commit_buffer = old_save_commit_buffer;
736 * Returns 1 if every object pointed to by the given remote refs is available
737 * locally and reachable from a local ref, and 0 otherwise.
739 static int everything_local(struct fetch_pack_args *args,
745 for (retval = 1, ref = *refs; ref ; ref = ref->next) {
746 const struct object_id *remote = &ref->old_oid;
749 o = lookup_object(the_repository, remote);
750 if (!o || !(o->flags & COMPLETE)) {
752 print_verbose(args, "want %s (%s)", oid_to_hex(remote),
756 print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
763 static int sideband_demux(int in, int out, void *data)
768 ret = recv_sideband("fetch-pack", xd[0], out);
773 static void write_promisor_file(const char *keep_name,
774 struct ref **sought, int nr_sought)
776 struct strbuf promisor_name = STRBUF_INIT;
781 strbuf_addstr(&promisor_name, keep_name);
782 suffix_stripped = strbuf_strip_suffix(&promisor_name, ".keep");
783 if (!suffix_stripped)
784 BUG("name of pack lockfile should end with .keep (was '%s')",
786 strbuf_addstr(&promisor_name, ".promisor");
788 output = xfopen(promisor_name.buf, "w");
789 for (i = 0; i < nr_sought; i++)
790 fprintf(output, "%s %s\n", oid_to_hex(&sought[i]->old_oid),
794 strbuf_release(&promisor_name);
798 * Pass 1 as "only_packfile" if the pack received is the only pack in this
799 * fetch request (that is, if there were no packfile URIs provided).
801 static int get_pack(struct fetch_pack_args *args,
802 int xd[2], struct string_list *pack_lockfiles,
804 struct ref **sought, int nr_sought)
807 int do_keep = args->keep_pack;
808 const char *cmd_name;
809 struct pack_header header;
811 struct child_process cmd = CHILD_PROCESS_INIT;
814 memset(&demux, 0, sizeof(demux));
816 /* xd[] is talking with upload-pack; subprocess reads from
817 * xd[0], spits out band#2 to stderr, and feeds us band#1
818 * through demux->out.
820 demux.proc = sideband_demux;
823 demux.isolate_sigpipe = 1;
824 if (start_async(&demux))
825 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
830 if (!args->keep_pack && unpack_limit) {
832 if (read_pack_header(demux.out, &header))
833 die(_("protocol error: bad pack header"));
835 if (ntohl(header.hdr_entries) < unpack_limit)
841 if (alternate_shallow_file) {
842 strvec_push(&cmd.args, "--shallow-file");
843 strvec_push(&cmd.args, alternate_shallow_file);
846 if (do_keep || args->from_promisor) {
849 cmd_name = "index-pack";
850 strvec_push(&cmd.args, cmd_name);
851 strvec_push(&cmd.args, "--stdin");
852 if (!args->quiet && !args->no_progress)
853 strvec_push(&cmd.args, "-v");
854 if (args->use_thin_pack)
855 strvec_push(&cmd.args, "--fix-thin");
856 if (do_keep && (args->lock_pack || unpack_limit)) {
857 char hostname[HOST_NAME_MAX + 1];
858 if (xgethostname(hostname, sizeof(hostname)))
859 xsnprintf(hostname, sizeof(hostname), "localhost");
860 strvec_pushf(&cmd.args,
861 "--keep=fetch-pack %"PRIuMAX " on %s",
862 (uintmax_t)getpid(), hostname);
864 if (only_packfile && args->check_self_contained_and_connected)
865 strvec_push(&cmd.args, "--check-self-contained-and-connected");
868 * We cannot perform any connectivity checks because
869 * not all packs have been downloaded; let the caller
870 * have this responsibility.
872 args->check_self_contained_and_connected = 0;
874 * If we're obtaining the filename of a lockfile, we'll use
875 * that filename to write a .promisor file with more
876 * information below. If not, we need index-pack to do it for
879 if (!(do_keep && pack_lockfiles) && args->from_promisor)
880 strvec_push(&cmd.args, "--promisor");
883 cmd_name = "unpack-objects";
884 strvec_push(&cmd.args, cmd_name);
885 if (args->quiet || args->no_progress)
886 strvec_push(&cmd.args, "-q");
887 args->check_self_contained_and_connected = 0;
891 strvec_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
892 ntohl(header.hdr_version),
893 ntohl(header.hdr_entries));
894 if (fetch_fsck_objects >= 0
896 : transfer_fsck_objects >= 0
897 ? transfer_fsck_objects
899 if (args->from_promisor)
901 * We cannot use --strict in index-pack because it
902 * checks both broken objects and links, but we only
903 * want to check for broken objects.
905 strvec_push(&cmd.args, "--fsck-objects");
907 strvec_pushf(&cmd.args, "--strict%s",
913 if (start_command(&cmd))
914 die(_("fetch-pack: unable to fork off %s"), cmd_name);
915 if (do_keep && pack_lockfiles) {
916 string_list_append_nodup(pack_lockfiles,
917 index_pack_lockfile(cmd.out));
922 /* Closed by start_command() */
925 ret = finish_command(&cmd);
926 if (!ret || (args->check_self_contained_and_connected && ret == 1))
927 args->self_contained_and_connected =
928 args->check_self_contained_and_connected &&
931 die(_("%s failed"), cmd_name);
932 if (use_sideband && finish_async(&demux))
933 die(_("error in sideband demultiplexer"));
936 * Now that index-pack has succeeded, write the promisor file using the
937 * obtained .keep filename if necessary
939 if (do_keep && pack_lockfiles && pack_lockfiles->nr && args->from_promisor)
940 write_promisor_file(pack_lockfiles->items[0].string, sought, nr_sought);
945 static int cmp_ref_by_name(const void *a_, const void *b_)
947 const struct ref *a = *((const struct ref **)a_);
948 const struct ref *b = *((const struct ref **)b_);
949 return strcmp(a->name, b->name);
952 static struct ref *do_fetch_pack(struct fetch_pack_args *args,
954 const struct ref *orig_ref,
955 struct ref **sought, int nr_sought,
956 struct shallow_info *si,
957 struct string_list *pack_lockfiles)
959 struct repository *r = the_repository;
960 struct ref *ref = copy_ref_list(orig_ref);
961 struct object_id oid;
962 const char *agent_feature;
964 struct fetch_negotiator negotiator_alloc;
965 struct fetch_negotiator *negotiator;
967 if (args->no_dependents) {
970 negotiator = &negotiator_alloc;
971 fetch_negotiator_init(r, negotiator);
974 sort_ref_list(&ref, ref_compare_name);
975 QSORT(sought, nr_sought, cmp_ref_by_name);
977 if ((agent_feature = server_feature_value("agent", &agent_len))) {
980 print_verbose(args, _("Server version is %.*s"),
981 agent_len, agent_feature);
984 if (server_supports("shallow"))
985 print_verbose(args, _("Server supports %s"), "shallow");
986 else if (args->depth > 0 || is_repository_shallow(r))
987 die(_("Server does not support shallow clients"));
988 if (args->depth > 0 || args->deepen_since || args->deepen_not)
990 if (server_supports("multi_ack_detailed")) {
991 print_verbose(args, _("Server supports %s"), "multi_ack_detailed");
993 if (server_supports("no-done")) {
994 print_verbose(args, _("Server supports %s"), "no-done");
995 if (args->stateless_rpc)
999 else if (server_supports("multi_ack")) {
1000 print_verbose(args, _("Server supports %s"), "multi_ack");
1003 if (server_supports("side-band-64k")) {
1004 print_verbose(args, _("Server supports %s"), "side-band-64k");
1007 else if (server_supports("side-band")) {
1008 print_verbose(args, _("Server supports %s"), "side-band");
1011 if (server_supports("allow-tip-sha1-in-want")) {
1012 print_verbose(args, _("Server supports %s"), "allow-tip-sha1-in-want");
1013 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1015 if (server_supports("allow-reachable-sha1-in-want")) {
1016 print_verbose(args, _("Server supports %s"), "allow-reachable-sha1-in-want");
1017 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1019 if (server_supports("thin-pack"))
1020 print_verbose(args, _("Server supports %s"), "thin-pack");
1022 args->use_thin_pack = 0;
1023 if (server_supports("no-progress"))
1024 print_verbose(args, _("Server supports %s"), "no-progress");
1026 args->no_progress = 0;
1027 if (server_supports("include-tag"))
1028 print_verbose(args, _("Server supports %s"), "include-tag");
1030 args->include_tag = 0;
1031 if (server_supports("ofs-delta"))
1032 print_verbose(args, _("Server supports %s"), "ofs-delta");
1034 prefer_ofs_delta = 0;
1036 if (server_supports("filter")) {
1037 server_supports_filtering = 1;
1038 print_verbose(args, _("Server supports %s"), "filter");
1039 } else if (args->filter_options.choice) {
1040 warning("filtering not recognized by server, ignoring");
1043 if (server_supports("deepen-since")) {
1044 print_verbose(args, _("Server supports %s"), "deepen-since");
1045 deepen_since_ok = 1;
1046 } else if (args->deepen_since)
1047 die(_("Server does not support --shallow-since"));
1048 if (server_supports("deepen-not")) {
1049 print_verbose(args, _("Server supports %s"), "deepen-not");
1051 } else if (args->deepen_not)
1052 die(_("Server does not support --shallow-exclude"));
1053 if (server_supports("deepen-relative"))
1054 print_verbose(args, _("Server supports %s"), "deepen-relative");
1055 else if (args->deepen_relative)
1056 die(_("Server does not support --deepen"));
1057 if (!server_supports_hash(the_hash_algo->name, NULL))
1058 die(_("Server does not support this repository's object format"));
1060 if (!args->no_dependents) {
1061 mark_complete_and_common_ref(negotiator, args, &ref);
1062 filter_refs(args, &ref, sought, nr_sought);
1063 if (everything_local(args, &ref)) {
1064 packet_flush(fd[1]);
1068 filter_refs(args, &ref, sought, nr_sought);
1070 if (find_common(negotiator, args, fd, &oid, ref) < 0)
1071 if (!args->keep_pack)
1072 /* When cloning, it is not unusual to have
1075 warning(_("no common commits"));
1077 if (args->stateless_rpc)
1078 packet_flush(fd[1]);
1080 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1082 else if (si->nr_ours || si->nr_theirs)
1083 alternate_shallow_file = setup_temporary_shallow(si->shallow);
1085 alternate_shallow_file = NULL;
1086 if (get_pack(args, fd, pack_lockfiles, 1, sought, nr_sought))
1087 die(_("git fetch-pack: fetch failed."));
1091 negotiator->release(negotiator);
1095 static void add_shallow_requests(struct strbuf *req_buf,
1096 const struct fetch_pack_args *args)
1098 if (is_repository_shallow(the_repository))
1099 write_shallow_commits(req_buf, 1, NULL);
1100 if (args->depth > 0)
1101 packet_buf_write(req_buf, "deepen %d", args->depth);
1102 if (args->deepen_since) {
1103 timestamp_t max_age = approxidate(args->deepen_since);
1104 packet_buf_write(req_buf, "deepen-since %"PRItime, max_age);
1106 if (args->deepen_not) {
1108 for (i = 0; i < args->deepen_not->nr; i++) {
1109 struct string_list_item *s = args->deepen_not->items + i;
1110 packet_buf_write(req_buf, "deepen-not %s", s->string);
1113 if (args->deepen_relative)
1114 packet_buf_write(req_buf, "deepen-relative\n");
1117 static void add_wants(int no_dependents, const struct ref *wants, struct strbuf *req_buf)
1119 int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0);
1121 for ( ; wants ; wants = wants->next) {
1122 const struct object_id *remote = &wants->old_oid;
1126 * If that object is complete (i.e. it is an ancestor of a
1127 * local ref), we tell them we have it but do not have to
1128 * tell them about its ancestors, which they already know
1131 * We use lookup_object here because we are only
1132 * interested in the case we *know* the object is
1133 * reachable and we have already scanned it.
1135 * Do this only if args->no_dependents is false (if it is true,
1136 * we cannot trust the object flags).
1138 if (!no_dependents &&
1139 ((o = lookup_object(the_repository, remote)) != NULL) &&
1140 (o->flags & COMPLETE)) {
1144 if (!use_ref_in_want || wants->exact_oid)
1145 packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote));
1147 packet_buf_write(req_buf, "want-ref %s\n", wants->name);
1151 static void add_common(struct strbuf *req_buf, struct oidset *common)
1153 struct oidset_iter iter;
1154 const struct object_id *oid;
1155 oidset_iter_init(common, &iter);
1157 while ((oid = oidset_iter_next(&iter))) {
1158 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1162 static int add_haves(struct fetch_negotiator *negotiator,
1164 struct strbuf *req_buf,
1165 int *haves_to_send, int *in_vain)
1168 int haves_added = 0;
1169 const struct object_id *oid;
1171 while ((oid = negotiator->next(negotiator))) {
1172 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1173 if (++haves_added >= *haves_to_send)
1177 *in_vain += haves_added;
1178 if (!haves_added || (seen_ack && *in_vain >= MAX_IN_VAIN)) {
1180 packet_buf_write(req_buf, "done\n");
1184 /* Increase haves to send on next round */
1185 *haves_to_send = next_flush(1, *haves_to_send);
1190 static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out,
1191 struct fetch_pack_args *args,
1192 const struct ref *wants, struct oidset *common,
1193 int *haves_to_send, int *in_vain,
1194 int sideband_all, int seen_ack)
1197 const char *hash_name;
1198 struct strbuf req_buf = STRBUF_INIT;
1200 if (server_supports_v2("fetch", 1))
1201 packet_buf_write(&req_buf, "command=fetch");
1202 if (server_supports_v2("agent", 0))
1203 packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
1204 if (args->server_options && args->server_options->nr &&
1205 server_supports_v2("server-option", 1)) {
1207 for (i = 0; i < args->server_options->nr; i++)
1208 packet_buf_write(&req_buf, "server-option=%s",
1209 args->server_options->items[i].string);
1212 if (server_feature_v2("object-format", &hash_name)) {
1213 int hash_algo = hash_algo_by_name(hash_name);
1214 if (hash_algo_by_ptr(the_hash_algo) != hash_algo)
1215 die(_("mismatched algorithms: client %s; server %s"),
1216 the_hash_algo->name, hash_name);
1217 packet_write_fmt(fd_out, "object-format=%s", the_hash_algo->name);
1218 } else if (hash_algo_by_ptr(the_hash_algo) != GIT_HASH_SHA1) {
1219 die(_("the server does not support algorithm '%s'"),
1220 the_hash_algo->name);
1223 packet_buf_delim(&req_buf);
1224 if (args->use_thin_pack)
1225 packet_buf_write(&req_buf, "thin-pack");
1226 if (args->no_progress)
1227 packet_buf_write(&req_buf, "no-progress");
1228 if (args->include_tag)
1229 packet_buf_write(&req_buf, "include-tag");
1230 if (prefer_ofs_delta)
1231 packet_buf_write(&req_buf, "ofs-delta");
1233 packet_buf_write(&req_buf, "sideband-all");
1235 /* Add shallow-info and deepen request */
1236 if (server_supports_feature("fetch", "shallow", 0))
1237 add_shallow_requests(&req_buf, args);
1238 else if (is_repository_shallow(the_repository) || args->deepen)
1239 die(_("Server does not support shallow requests"));
1242 if (server_supports_feature("fetch", "filter", 0) &&
1243 args->filter_options.choice) {
1245 expand_list_objects_filter_spec(&args->filter_options);
1246 print_verbose(args, _("Server supports filter"));
1247 packet_buf_write(&req_buf, "filter %s", spec);
1248 } else if (args->filter_options.choice) {
1249 warning("filtering not recognized by server, ignoring");
1252 if (server_supports_feature("fetch", "packfile-uris", 0)) {
1254 struct strbuf to_send = STRBUF_INIT;
1256 for (i = 0; i < uri_protocols.nr; i++) {
1257 const char *s = uri_protocols.items[i].string;
1259 if (!strcmp(s, "https") || !strcmp(s, "http")) {
1261 strbuf_addch(&to_send, ',');
1262 strbuf_addstr(&to_send, s);
1266 packet_buf_write(&req_buf, "packfile-uris %s",
1268 strbuf_release(&to_send);
1273 add_wants(args->no_dependents, wants, &req_buf);
1275 if (args->no_dependents) {
1276 packet_buf_write(&req_buf, "done");
1279 /* Add all of the common commits we've found in previous rounds */
1280 add_common(&req_buf, common);
1282 /* Add initial haves */
1283 ret = add_haves(negotiator, seen_ack, &req_buf,
1284 haves_to_send, in_vain);
1288 packet_buf_flush(&req_buf);
1289 if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0)
1290 die_errno(_("unable to write request to remote"));
1292 strbuf_release(&req_buf);
1297 * Processes a section header in a server's response and checks if it matches
1298 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1299 * not consumed); if 0, the line will be consumed and the function will die if
1300 * the section header doesn't match what was expected.
1302 static int process_section_header(struct packet_reader *reader,
1303 const char *section, int peek)
1307 if (packet_reader_peek(reader) != PACKET_READ_NORMAL)
1308 die(_("error reading section header '%s'"), section);
1310 ret = !strcmp(reader->line, section);
1314 die(_("expected '%s', received '%s'"),
1315 section, reader->line);
1316 packet_reader_read(reader);
1324 * No commit was found to be possessed by both the client and the
1325 * server, and "ready" was not received.
1330 * At least one commit was found to be possessed by both the client and
1331 * the server, and "ready" was not received.
1336 * "ready" was received, indicating that the server is ready to send
1337 * the packfile without any further negotiation.
1342 static enum common_found process_acks(struct fetch_negotiator *negotiator,
1343 struct packet_reader *reader,
1344 struct oidset *common)
1347 int received_ready = 0;
1348 int received_ack = 0;
1350 process_section_header(reader, "acknowledgments", 0);
1351 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1354 if (!strcmp(reader->line, "NAK"))
1357 if (skip_prefix(reader->line, "ACK ", &arg)) {
1358 struct object_id oid;
1360 if (!get_oid_hex(arg, &oid)) {
1361 struct commit *commit;
1362 oidset_insert(common, &oid);
1363 commit = lookup_commit(the_repository, &oid);
1365 negotiator->ack(negotiator, commit);
1370 if (!strcmp(reader->line, "ready")) {
1375 die(_("unexpected acknowledgment line: '%s'"), reader->line);
1378 if (reader->status != PACKET_READ_FLUSH &&
1379 reader->status != PACKET_READ_DELIM)
1380 die(_("error processing acks: %d"), reader->status);
1383 * If an "acknowledgments" section is sent, a packfile is sent if and
1384 * only if "ready" was sent in this section. The other sections
1385 * ("shallow-info" and "wanted-refs") are sent only if a packfile is
1386 * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH
1389 if (received_ready && reader->status != PACKET_READ_DELIM)
1390 die(_("expected packfile to be sent after 'ready'"));
1391 if (!received_ready && reader->status != PACKET_READ_FLUSH)
1392 die(_("expected no other sections to be sent after no 'ready'"));
1394 return received_ready ? READY :
1395 (received_ack ? COMMON_FOUND : NO_COMMON_FOUND);
1398 static void receive_shallow_info(struct fetch_pack_args *args,
1399 struct packet_reader *reader,
1400 struct oid_array *shallows,
1401 struct shallow_info *si)
1403 int unshallow_received = 0;
1405 process_section_header(reader, "shallow-info", 0);
1406 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1408 struct object_id oid;
1410 if (skip_prefix(reader->line, "shallow ", &arg)) {
1411 if (get_oid_hex(arg, &oid))
1412 die(_("invalid shallow line: %s"), reader->line);
1413 oid_array_append(shallows, &oid);
1416 if (skip_prefix(reader->line, "unshallow ", &arg)) {
1417 if (get_oid_hex(arg, &oid))
1418 die(_("invalid unshallow line: %s"), reader->line);
1419 if (!lookup_object(the_repository, &oid))
1420 die(_("object not found: %s"), reader->line);
1421 /* make sure that it is parsed as shallow */
1422 if (!parse_object(the_repository, &oid))
1423 die(_("error in object: %s"), reader->line);
1424 if (unregister_shallow(&oid))
1425 die(_("no shallow found: %s"), reader->line);
1426 unshallow_received = 1;
1429 die(_("expected shallow/unshallow, got %s"), reader->line);
1432 if (reader->status != PACKET_READ_FLUSH &&
1433 reader->status != PACKET_READ_DELIM)
1434 die(_("error processing shallow info: %d"), reader->status);
1436 if (args->deepen || unshallow_received) {
1438 * Treat these as shallow lines caused by our depth settings.
1439 * In v0, these lines cannot cause refs to be rejected; do the
1444 for (i = 0; i < shallows->nr; i++)
1445 register_shallow(the_repository, &shallows->oid[i]);
1446 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1449 } else if (shallows->nr) {
1451 * Treat these as shallow lines caused by the remote being
1452 * shallow. In v0, remote refs that reach these objects are
1453 * rejected (unless --update-shallow is set); do the same.
1455 prepare_shallow_info(si, shallows);
1456 if (si->nr_ours || si->nr_theirs)
1457 alternate_shallow_file =
1458 setup_temporary_shallow(si->shallow);
1460 alternate_shallow_file = NULL;
1462 alternate_shallow_file = NULL;
1466 static int cmp_name_ref(const void *name, const void *ref)
1468 return strcmp(name, (*(struct ref **)ref)->name);
1471 static void receive_wanted_refs(struct packet_reader *reader,
1472 struct ref **sought, int nr_sought)
1474 process_section_header(reader, "wanted-refs", 0);
1475 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1476 struct object_id oid;
1480 if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ')
1481 die(_("expected wanted-ref, got '%s'"), reader->line);
1483 found = bsearch(end, sought, nr_sought, sizeof(*sought),
1486 die(_("unexpected wanted-ref: '%s'"), reader->line);
1487 oidcpy(&(*found)->old_oid, &oid);
1490 if (reader->status != PACKET_READ_DELIM)
1491 die(_("error processing wanted refs: %d"), reader->status);
1494 static void receive_packfile_uris(struct packet_reader *reader,
1495 struct string_list *uris)
1497 process_section_header(reader, "packfile-uris", 0);
1498 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1499 if (reader->pktlen < the_hash_algo->hexsz ||
1500 reader->line[the_hash_algo->hexsz] != ' ')
1501 die("expected '<hash> <uri>', got: %s\n", reader->line);
1503 string_list_append(uris, reader->line);
1505 if (reader->status != PACKET_READ_DELIM)
1506 die("expected DELIM");
1510 FETCH_CHECK_LOCAL = 0,
1517 static void do_check_stateless_delimiter(const struct fetch_pack_args *args,
1518 struct packet_reader *reader)
1520 check_stateless_delimiter(args->stateless_rpc, reader,
1521 _("git fetch-pack: expected response end packet"));
1524 static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
1526 const struct ref *orig_ref,
1527 struct ref **sought, int nr_sought,
1528 struct oid_array *shallows,
1529 struct shallow_info *si,
1530 struct string_list *pack_lockfiles)
1532 struct repository *r = the_repository;
1533 struct ref *ref = copy_ref_list(orig_ref);
1534 enum fetch_state state = FETCH_CHECK_LOCAL;
1535 struct oidset common = OIDSET_INIT;
1536 struct packet_reader reader;
1537 int in_vain = 0, negotiation_started = 0;
1538 int haves_to_send = INITIAL_FLUSH;
1539 struct fetch_negotiator negotiator_alloc;
1540 struct fetch_negotiator *negotiator;
1542 struct string_list packfile_uris = STRING_LIST_INIT_DUP;
1545 if (args->no_dependents) {
1548 negotiator = &negotiator_alloc;
1549 fetch_negotiator_init(r, negotiator);
1552 packet_reader_init(&reader, fd[0], NULL, 0,
1553 PACKET_READ_CHOMP_NEWLINE |
1554 PACKET_READ_DIE_ON_ERR_PACKET);
1555 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) &&
1556 server_supports_feature("fetch", "sideband-all", 0)) {
1557 reader.use_sideband = 1;
1558 reader.me = "fetch-pack";
1561 while (state != FETCH_DONE) {
1563 case FETCH_CHECK_LOCAL:
1564 sort_ref_list(&ref, ref_compare_name);
1565 QSORT(sought, nr_sought, cmp_ref_by_name);
1567 /* v2 supports these by default */
1568 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1570 if (args->depth > 0 || args->deepen_since || args->deepen_not)
1573 /* Filter 'ref' by 'sought' and those that aren't local */
1574 if (!args->no_dependents) {
1575 mark_complete_and_common_ref(negotiator, args, &ref);
1576 filter_refs(args, &ref, sought, nr_sought);
1577 if (everything_local(args, &ref))
1580 state = FETCH_SEND_REQUEST;
1582 mark_tips(negotiator, args->negotiation_tips);
1583 for_each_cached_alternate(negotiator,
1584 insert_one_alternate_object);
1586 filter_refs(args, &ref, sought, nr_sought);
1587 state = FETCH_SEND_REQUEST;
1590 case FETCH_SEND_REQUEST:
1591 if (!negotiation_started) {
1592 negotiation_started = 1;
1593 trace2_region_enter("fetch-pack",
1597 if (send_fetch_request(negotiator, fd[1], args, ref,
1599 &haves_to_send, &in_vain,
1600 reader.use_sideband,
1602 state = FETCH_GET_PACK;
1604 state = FETCH_PROCESS_ACKS;
1606 case FETCH_PROCESS_ACKS:
1607 /* Process ACKs/NAKs */
1608 switch (process_acks(negotiator, &reader, &common)) {
1611 * Don't check for response delimiter; get_pack() will
1612 * read the rest of this response.
1614 state = FETCH_GET_PACK;
1620 case NO_COMMON_FOUND:
1621 do_check_stateless_delimiter(args, &reader);
1622 state = FETCH_SEND_REQUEST;
1626 case FETCH_GET_PACK:
1627 trace2_region_leave("fetch-pack",
1630 /* Check for shallow-info section */
1631 if (process_section_header(&reader, "shallow-info", 1))
1632 receive_shallow_info(args, &reader, shallows, si);
1634 if (process_section_header(&reader, "wanted-refs", 1))
1635 receive_wanted_refs(&reader, sought, nr_sought);
1637 /* get the pack(s) */
1638 if (process_section_header(&reader, "packfile-uris", 1))
1639 receive_packfile_uris(&reader, &packfile_uris);
1640 process_section_header(&reader, "packfile", 0);
1641 if (get_pack(args, fd, pack_lockfiles,
1642 !packfile_uris.nr, sought, nr_sought))
1643 die(_("git fetch-pack: fetch failed."));
1644 do_check_stateless_delimiter(args, &reader);
1653 for (i = 0; i < packfile_uris.nr; i++) {
1654 struct child_process cmd = CHILD_PROCESS_INIT;
1655 char packname[GIT_MAX_HEXSZ + 1];
1656 const char *uri = packfile_uris.items[i].string +
1657 the_hash_algo->hexsz + 1;
1659 strvec_push(&cmd.args, "http-fetch");
1660 strvec_pushf(&cmd.args, "--packfile=%.*s",
1661 (int) the_hash_algo->hexsz,
1662 packfile_uris.items[i].string);
1663 strvec_push(&cmd.args, uri);
1667 if (start_command(&cmd))
1668 die("fetch-pack: unable to spawn http-fetch");
1670 if (read_in_full(cmd.out, packname, 5) < 0 ||
1671 memcmp(packname, "keep\t", 5))
1672 die("fetch-pack: expected keep then TAB at start of http-fetch output");
1674 if (read_in_full(cmd.out, packname,
1675 the_hash_algo->hexsz + 1) < 0 ||
1676 packname[the_hash_algo->hexsz] != '\n')
1677 die("fetch-pack: expected hash then LF at end of http-fetch output");
1679 packname[the_hash_algo->hexsz] = '\0';
1683 if (finish_command(&cmd))
1684 die("fetch-pack: unable to finish http-fetch");
1686 if (memcmp(packfile_uris.items[i].string, packname,
1687 the_hash_algo->hexsz))
1688 die("fetch-pack: pack downloaded from %s does not match expected hash %.*s",
1689 uri, (int) the_hash_algo->hexsz,
1690 packfile_uris.items[i].string);
1692 string_list_append_nodup(pack_lockfiles,
1693 xstrfmt("%s/pack/pack-%s.keep",
1694 get_object_directory(),
1697 string_list_clear(&packfile_uris, 0);
1700 negotiator->release(negotiator);
1702 oidset_clear(&common);
1706 static int fetch_pack_config_cb(const char *var, const char *value, void *cb)
1708 if (strcmp(var, "fetch.fsck.skiplist") == 0) {
1711 if (git_config_pathname(&path, var, value))
1713 strbuf_addf(&fsck_msg_types, "%cskiplist=%s",
1714 fsck_msg_types.len ? ',' : '=', path);
1719 if (skip_prefix(var, "fetch.fsck.", &var)) {
1720 if (is_valid_msg_type(var, value))
1721 strbuf_addf(&fsck_msg_types, "%c%s=%s",
1722 fsck_msg_types.len ? ',' : '=', var, value);
1724 warning("Skipping unknown msg id '%s'", var);
1728 return git_default_config(var, value, cb);
1731 static void fetch_pack_config(void)
1733 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
1734 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
1735 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
1736 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
1737 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
1738 if (!uri_protocols.nr) {
1741 if (!git_config_get_string("fetch.uriprotocols", &str) && str) {
1742 string_list_split(&uri_protocols, str, ',', -1);
1747 git_config(fetch_pack_config_cb, NULL);
1750 static void fetch_pack_setup(void)
1752 static int did_setup;
1755 fetch_pack_config();
1756 if (0 <= transfer_unpack_limit)
1757 unpack_limit = transfer_unpack_limit;
1758 else if (0 <= fetch_unpack_limit)
1759 unpack_limit = fetch_unpack_limit;
1763 static int remove_duplicates_in_refs(struct ref **ref, int nr)
1765 struct string_list names = STRING_LIST_INIT_NODUP;
1768 for (src = dst = 0; src < nr; src++) {
1769 struct string_list_item *item;
1770 item = string_list_insert(&names, ref[src]->name);
1772 continue; /* already have it */
1773 item->util = ref[src];
1775 ref[dst] = ref[src];
1778 for (src = dst; src < nr; src++)
1780 string_list_clear(&names, 0);
1784 static void update_shallow(struct fetch_pack_args *args,
1785 struct ref **sought, int nr_sought,
1786 struct shallow_info *si)
1788 struct oid_array ref = OID_ARRAY_INIT;
1792 if (args->deepen && alternate_shallow_file) {
1793 if (*alternate_shallow_file == '\0') { /* --unshallow */
1794 unlink_or_warn(git_path_shallow(the_repository));
1795 rollback_shallow_file(the_repository, &shallow_lock);
1797 commit_shallow_file(the_repository, &shallow_lock);
1798 alternate_shallow_file = NULL;
1802 if (!si->shallow || !si->shallow->nr)
1805 if (args->cloning) {
1807 * remote is shallow, but this is a clone, there are
1808 * no objects in repo to worry about. Accept any
1809 * shallow points that exist in the pack (iow in repo
1810 * after get_pack() and reprepare_packed_git())
1812 struct oid_array extra = OID_ARRAY_INIT;
1813 struct object_id *oid = si->shallow->oid;
1814 for (i = 0; i < si->shallow->nr; i++)
1815 if (has_object_file(&oid[i]))
1816 oid_array_append(&extra, &oid[i]);
1818 setup_alternate_shallow(&shallow_lock,
1819 &alternate_shallow_file,
1821 commit_shallow_file(the_repository, &shallow_lock);
1822 alternate_shallow_file = NULL;
1824 oid_array_clear(&extra);
1828 if (!si->nr_ours && !si->nr_theirs)
1831 remove_nonexistent_theirs_shallow(si);
1832 if (!si->nr_ours && !si->nr_theirs)
1834 for (i = 0; i < nr_sought; i++)
1835 oid_array_append(&ref, &sought[i]->old_oid);
1838 if (args->update_shallow) {
1840 * remote is also shallow, .git/shallow may be updated
1841 * so all refs can be accepted. Make sure we only add
1842 * shallow roots that are actually reachable from new
1845 struct oid_array extra = OID_ARRAY_INIT;
1846 struct object_id *oid = si->shallow->oid;
1847 assign_shallow_commits_to_refs(si, NULL, NULL);
1848 if (!si->nr_ours && !si->nr_theirs) {
1849 oid_array_clear(&ref);
1852 for (i = 0; i < si->nr_ours; i++)
1853 oid_array_append(&extra, &oid[si->ours[i]]);
1854 for (i = 0; i < si->nr_theirs; i++)
1855 oid_array_append(&extra, &oid[si->theirs[i]]);
1856 setup_alternate_shallow(&shallow_lock,
1857 &alternate_shallow_file,
1859 commit_shallow_file(the_repository, &shallow_lock);
1860 oid_array_clear(&extra);
1861 oid_array_clear(&ref);
1862 alternate_shallow_file = NULL;
1867 * remote is also shallow, check what ref is safe to update
1868 * without updating .git/shallow
1870 status = xcalloc(nr_sought, sizeof(*status));
1871 assign_shallow_commits_to_refs(si, NULL, status);
1872 if (si->nr_ours || si->nr_theirs) {
1873 for (i = 0; i < nr_sought; i++)
1875 sought[i]->status = REF_STATUS_REJECT_SHALLOW;
1878 oid_array_clear(&ref);
1881 static int iterate_ref_map(void *cb_data, struct object_id *oid)
1883 struct ref **rm = cb_data;
1884 struct ref *ref = *rm;
1887 return -1; /* end of the list */
1889 oidcpy(oid, &ref->old_oid);
1893 struct ref *fetch_pack(struct fetch_pack_args *args,
1895 const struct ref *ref,
1896 struct ref **sought, int nr_sought,
1897 struct oid_array *shallow,
1898 struct string_list *pack_lockfiles,
1899 enum protocol_version version)
1901 struct ref *ref_cpy;
1902 struct shallow_info si;
1903 struct oid_array shallows_scratch = OID_ARRAY_INIT;
1907 nr_sought = remove_duplicates_in_refs(sought, nr_sought);
1909 if (args->no_dependents && !args->filter_options.choice) {
1911 * The protocol does not support requesting that only the
1912 * wanted objects be sent, so approximate this by setting a
1913 * "blob:none" filter if no filter is already set. This works
1914 * for all object types: note that wanted blobs will still be
1915 * sent because they are directly specified as a "want".
1917 * NEEDSWORK: Add an option in the protocol to request that
1918 * only the wanted objects be sent, and implement it.
1920 parse_list_objects_filter(&args->filter_options, "blob:none");
1923 if (version != protocol_v2 && !ref) {
1924 packet_flush(fd[1]);
1925 die(_("no matching remote head"));
1927 if (version == protocol_v2) {
1929 BUG("Protocol V2 does not provide shallows at this point in the fetch");
1930 memset(&si, 0, sizeof(si));
1931 ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
1932 &shallows_scratch, &si,
1935 prepare_shallow_info(&si, shallow);
1936 ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
1937 &si, pack_lockfiles);
1939 reprepare_packed_git(the_repository);
1941 if (!args->cloning && args->deepen) {
1942 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1943 struct ref *iterator = ref_cpy;
1944 opt.shallow_file = alternate_shallow_file;
1946 opt.is_deepening_fetch = 1;
1947 if (check_connected(iterate_ref_map, &iterator, &opt)) {
1948 error(_("remote did not send all necessary objects"));
1951 rollback_shallow_file(the_repository, &shallow_lock);
1954 args->connectivity_checked = 1;
1957 update_shallow(args, sought, nr_sought, &si);
1959 clear_shallow_info(&si);
1960 oid_array_clear(&shallows_scratch);
1964 int report_unmatched_refs(struct ref **sought, int nr_sought)
1968 for (i = 0; i < nr_sought; i++) {
1971 switch (sought[i]->match_status) {
1974 case REF_NOT_MATCHED:
1975 error(_("no such remote ref %s"), sought[i]->name);
1977 case REF_UNADVERTISED_NOT_ALLOWED:
1978 error(_("Server does not allow request for unadvertised object %s"),