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 int advertise_sid;
39 static struct shallow_lock shallow_lock;
40 static const char *alternate_shallow_file;
41 static struct fsck_options fsck_options = FSCK_OPTIONS_MISSING_GITMODULES;
42 static struct strbuf fsck_msg_types = STRBUF_INIT;
43 static struct string_list uri_protocols = STRING_LIST_INIT_DUP;
45 /* Remember to update object flag allocation in object.h */
46 #define COMPLETE (1U << 0)
47 #define ALTERNATE (1U << 1)
50 * After sending this many "have"s if we do not get any new ACK , we
51 * give up traversing our history.
53 #define MAX_IN_VAIN 256
55 static int multi_ack, use_sideband;
56 /* Allow specifying sha1 if it is a ref tip. */
57 #define ALLOW_TIP_SHA1 01
58 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
59 #define ALLOW_REACHABLE_SHA1 02
60 static unsigned int allow_unadvertised_object_request;
62 __attribute__((format (printf, 2, 3)))
63 static inline void print_verbose(const struct fetch_pack_args *args,
71 va_start(params, fmt);
72 vfprintf(stderr, fmt, params);
77 struct alternate_object_cache {
78 struct object **items;
82 static void cache_one_alternate(const struct object_id *oid,
85 struct alternate_object_cache *cache = vcache;
86 struct object *obj = parse_object(the_repository, oid);
88 if (!obj || (obj->flags & ALTERNATE))
91 obj->flags |= ALTERNATE;
92 ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
93 cache->items[cache->nr++] = obj;
96 static void for_each_cached_alternate(struct fetch_negotiator *negotiator,
97 void (*cb)(struct fetch_negotiator *,
100 static int initialized;
101 static struct alternate_object_cache cache;
105 for_each_alternate_ref(cache_one_alternate, &cache);
109 for (i = 0; i < cache.nr; i++)
110 cb(negotiator, cache.items[i]);
113 static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
114 int mark_tags_complete)
116 enum object_type type;
117 struct object_info info = { .typep = &type };
120 if (oid_object_info_extended(the_repository, oid, &info,
121 OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK))
123 if (type == OBJ_TAG) {
124 struct tag *tag = (struct tag *)
125 parse_object(the_repository, oid);
129 if (mark_tags_complete)
130 tag->object.flags |= COMPLETE;
131 oid = &tag->tagged->oid;
136 if (type == OBJ_COMMIT)
137 return (struct commit *) parse_object(the_repository, oid);
141 static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
142 const struct object_id *oid)
144 struct commit *c = deref_without_lazy_fetch(oid, 0);
147 negotiator->add_tip(negotiator, c);
151 static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
152 int flag, void *cb_data)
154 return rev_list_insert_ref(cb_data, oid);
165 static void consume_shallow_list(struct fetch_pack_args *args,
166 struct packet_reader *reader)
168 if (args->stateless_rpc && args->deepen) {
169 /* If we sent a depth we will get back "duplicate"
170 * shallow and unshallow commands every time there
171 * is a block of have lines exchanged.
173 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
174 if (starts_with(reader->line, "shallow "))
176 if (starts_with(reader->line, "unshallow "))
178 die(_("git fetch-pack: expected shallow list"));
180 if (reader->status != PACKET_READ_FLUSH)
181 die(_("git fetch-pack: expected a flush packet after shallow list"));
185 static enum ack_type get_ack(struct packet_reader *reader,
186 struct object_id *result_oid)
191 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
192 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
193 len = reader->pktlen;
195 if (!strcmp(reader->line, "NAK"))
197 if (skip_prefix(reader->line, "ACK ", &arg)) {
199 if (!parse_oid_hex(arg, result_oid, &p)) {
200 len -= p - reader->line;
203 if (strstr(p, "continue"))
205 if (strstr(p, "common"))
207 if (strstr(p, "ready"))
212 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader->line);
215 static void send_request(struct fetch_pack_args *args,
216 int fd, struct strbuf *buf)
218 if (args->stateless_rpc) {
219 send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
222 if (write_in_full(fd, buf->buf, buf->len) < 0)
223 die_errno(_("unable to write to remote"));
227 static void insert_one_alternate_object(struct fetch_negotiator *negotiator,
230 rev_list_insert_ref(negotiator, &obj->oid);
233 #define INITIAL_FLUSH 16
234 #define PIPESAFE_FLUSH 32
235 #define LARGE_FLUSH 16384
237 static int next_flush(int stateless_rpc, int count)
240 if (count < LARGE_FLUSH)
243 count = count * 11 / 10;
245 if (count < PIPESAFE_FLUSH)
248 count += PIPESAFE_FLUSH;
253 static void mark_tips(struct fetch_negotiator *negotiator,
254 const struct oid_array *negotiation_tips)
258 if (!negotiation_tips) {
259 for_each_rawref(rev_list_insert_ref_oid, negotiator);
263 for (i = 0; i < negotiation_tips->nr; i++)
264 rev_list_insert_ref(negotiator, &negotiation_tips->oid[i]);
268 static int find_common(struct fetch_negotiator *negotiator,
269 struct fetch_pack_args *args,
270 int fd[2], struct object_id *result_oid,
274 int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
275 const struct object_id *oid;
276 unsigned in_vain = 0;
277 int got_continue = 0;
279 struct strbuf req_buf = STRBUF_INIT;
280 size_t state_len = 0;
281 struct packet_reader reader;
283 if (args->stateless_rpc && multi_ack == 1)
284 die(_("--stateless-rpc requires multi_ack_detailed"));
286 packet_reader_init(&reader, fd[0], NULL, 0,
287 PACKET_READ_CHOMP_NEWLINE |
288 PACKET_READ_DIE_ON_ERR_PACKET);
290 mark_tips(negotiator, args->negotiation_tips);
291 for_each_cached_alternate(negotiator, insert_one_alternate_object);
294 for ( ; refs ; refs = refs->next) {
295 struct object_id *remote = &refs->old_oid;
296 const char *remote_hex;
300 * If that object is complete (i.e. it is an ancestor of a
301 * local ref), we tell them we have it but do not have to
302 * tell them about its ancestors, which they already know
305 * We use lookup_object here because we are only
306 * interested in the case we *know* the object is
307 * reachable and we have already scanned it.
309 if (((o = lookup_object(the_repository, remote)) != NULL) &&
310 (o->flags & COMPLETE)) {
314 remote_hex = oid_to_hex(remote);
316 struct strbuf c = STRBUF_INIT;
317 if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
318 if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
319 if (no_done) strbuf_addstr(&c, " no-done");
320 if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
321 if (use_sideband == 1) strbuf_addstr(&c, " side-band");
322 if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
323 if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
324 if (args->no_progress) strbuf_addstr(&c, " no-progress");
325 if (args->include_tag) strbuf_addstr(&c, " include-tag");
326 if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
327 if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
328 if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
329 if (agent_supported) strbuf_addf(&c, " agent=%s",
330 git_user_agent_sanitized());
332 strbuf_addf(&c, " session-id=%s", trace2_session_id());
333 if (args->filter_options.choice)
334 strbuf_addstr(&c, " filter");
335 packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
338 packet_buf_write(&req_buf, "want %s\n", remote_hex);
343 strbuf_release(&req_buf);
348 if (is_repository_shallow(the_repository))
349 write_shallow_commits(&req_buf, 1, NULL);
351 packet_buf_write(&req_buf, "deepen %d", args->depth);
352 if (args->deepen_since) {
353 timestamp_t max_age = approxidate(args->deepen_since);
354 packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
356 if (args->deepen_not) {
358 for (i = 0; i < args->deepen_not->nr; i++) {
359 struct string_list_item *s = args->deepen_not->items + i;
360 packet_buf_write(&req_buf, "deepen-not %s", s->string);
363 if (server_supports_filtering && args->filter_options.choice) {
365 expand_list_objects_filter_spec(&args->filter_options);
366 packet_buf_write(&req_buf, "filter %s", spec);
368 packet_buf_flush(&req_buf);
369 state_len = req_buf.len;
373 struct object_id oid;
375 send_request(args, fd[1], &req_buf);
376 while (packet_reader_read(&reader) == PACKET_READ_NORMAL) {
377 if (skip_prefix(reader.line, "shallow ", &arg)) {
378 if (get_oid_hex(arg, &oid))
379 die(_("invalid shallow line: %s"), reader.line);
380 register_shallow(the_repository, &oid);
383 if (skip_prefix(reader.line, "unshallow ", &arg)) {
384 if (get_oid_hex(arg, &oid))
385 die(_("invalid unshallow line: %s"), reader.line);
386 if (!lookup_object(the_repository, &oid))
387 die(_("object not found: %s"), reader.line);
388 /* make sure that it is parsed as shallow */
389 if (!parse_object(the_repository, &oid))
390 die(_("error in object: %s"), reader.line);
391 if (unregister_shallow(&oid))
392 die(_("no shallow found: %s"), reader.line);
395 die(_("expected shallow/unshallow, got %s"), reader.line);
397 } else if (!args->stateless_rpc)
398 send_request(args, fd[1], &req_buf);
400 if (!args->stateless_rpc) {
401 /* If we aren't using the stateless-rpc interface
402 * we don't need to retain the headers.
404 strbuf_setlen(&req_buf, 0);
408 trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository);
411 while ((oid = negotiator->next(negotiator))) {
412 packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
413 print_verbose(args, "have %s", oid_to_hex(oid));
415 if (flush_at <= ++count) {
418 packet_buf_flush(&req_buf);
419 send_request(args, fd[1], &req_buf);
420 strbuf_setlen(&req_buf, state_len);
422 flush_at = next_flush(args->stateless_rpc, count);
425 * We keep one window "ahead" of the other side, and
426 * will wait for an ACK only on the next one
428 if (!args->stateless_rpc && count == INITIAL_FLUSH)
431 consume_shallow_list(args, &reader);
433 ack = get_ack(&reader, result_oid);
435 print_verbose(args, _("got %s %d %s"), "ack",
436 ack, oid_to_hex(result_oid));
446 struct commit *commit =
447 lookup_commit(the_repository,
452 die(_("invalid commit %s"), oid_to_hex(result_oid));
453 was_common = negotiator->ack(negotiator, commit);
454 if (args->stateless_rpc
457 /* We need to replay the have for this object
458 * on the next RPC request so the peer knows
459 * it is in common with us.
461 const char *hex = oid_to_hex(result_oid);
462 packet_buf_write(&req_buf, "have %s\n", hex);
463 state_len = req_buf.len;
465 * Reset in_vain because an ack
466 * for this commit has not been
470 } else if (!args->stateless_rpc
471 || ack != ACK_common)
475 if (ack == ACK_ready)
482 if (got_continue && MAX_IN_VAIN < in_vain) {
483 print_verbose(args, _("giving up"));
491 trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository);
492 if (!got_ready || !no_done) {
493 packet_buf_write(&req_buf, "done\n");
494 send_request(args, fd[1], &req_buf);
496 print_verbose(args, _("done"));
501 strbuf_release(&req_buf);
503 if (!got_ready || !no_done)
504 consume_shallow_list(args, &reader);
505 while (flushes || multi_ack) {
506 int ack = get_ack(&reader, result_oid);
508 print_verbose(args, _("got %s (%d) %s"), "ack",
509 ack, oid_to_hex(result_oid));
517 /* it is no error to fetch into a completely empty repo */
518 return count ? retval : 0;
521 static struct commit_list *complete;
523 static int mark_complete(const struct object_id *oid)
525 struct commit *commit = deref_without_lazy_fetch(oid, 1);
527 if (commit && !(commit->object.flags & COMPLETE)) {
528 commit->object.flags |= COMPLETE;
529 commit_list_insert(commit, &complete);
534 static int mark_complete_oid(const char *refname, const struct object_id *oid,
535 int flag, void *cb_data)
537 return mark_complete(oid);
540 static void mark_recent_complete_commits(struct fetch_pack_args *args,
543 while (complete && cutoff <= complete->item->date) {
544 print_verbose(args, _("Marking %s as complete"),
545 oid_to_hex(&complete->item->object.oid));
546 pop_most_recent_commit(&complete, COMPLETE);
550 static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
552 for (; refs; refs = refs->next)
553 oidset_insert(oids, &refs->old_oid);
556 static int is_unmatched_ref(const struct ref *ref)
558 struct object_id oid;
560 return ref->match_status == REF_NOT_MATCHED &&
561 !parse_oid_hex(ref->name, &oid, &p) &&
563 oideq(&oid, &ref->old_oid);
566 static void filter_refs(struct fetch_pack_args *args,
568 struct ref **sought, int nr_sought)
570 struct ref *newlist = NULL;
571 struct ref **newtail = &newlist;
572 struct ref *unmatched = NULL;
573 struct ref *ref, *next;
574 struct oidset tip_oids = OIDSET_INIT;
576 int strict = !(allow_unadvertised_object_request &
577 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
580 for (ref = *refs; ref; ref = next) {
584 if (starts_with(ref->name, "refs/") &&
585 check_refname_format(ref->name, 0)) {
587 * trash or a peeled value; do not even add it to
593 while (i < nr_sought) {
594 int cmp = strcmp(ref->name, sought[i]->name);
596 break; /* definitely do not have it */
598 keep = 1; /* definitely have it */
599 sought[i]->match_status = REF_MATCHED;
604 if (!keep && args->fetch_all &&
605 (!args->deepen || !starts_with(ref->name, "refs/tags/")))
612 newtail = &ref->next;
614 ref->next = unmatched;
620 for (i = 0; i < nr_sought; i++) {
622 if (!is_unmatched_ref(ref))
625 add_refs_to_oidset(&tip_oids, unmatched);
626 add_refs_to_oidset(&tip_oids, newlist);
631 /* Append unmatched requests to the list */
632 for (i = 0; i < nr_sought; i++) {
634 if (!is_unmatched_ref(ref))
637 if (!strict || oidset_contains(&tip_oids, &ref->old_oid)) {
638 ref->match_status = REF_MATCHED;
639 *newtail = copy_ref(ref);
640 newtail = &(*newtail)->next;
642 ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
646 oidset_clear(&tip_oids);
647 free_refs(unmatched);
652 static void mark_alternate_complete(struct fetch_negotiator *unused,
655 mark_complete(&obj->oid);
658 struct loose_object_iter {
659 struct oidset *loose_object_set;
664 * Mark recent commits available locally and reachable from a local ref as
667 * The cutoff time for recency is determined by this heuristic: it is the
668 * earliest commit time of the objects in refs that are commits and that we know
669 * the commit time of.
671 static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
672 struct fetch_pack_args *args,
676 int old_save_commit_buffer = save_commit_buffer;
677 timestamp_t cutoff = 0;
679 save_commit_buffer = 0;
681 trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
682 for (ref = *refs; ref; ref = ref->next) {
685 if (!has_object_file_with_flags(&ref->old_oid,
687 OBJECT_INFO_SKIP_FETCH_OBJECT))
689 o = parse_object(the_repository, &ref->old_oid);
694 * We already have it -- which may mean that we were
695 * in sync with the other side at some time after
696 * that (it is OK if we guess wrong here).
698 if (o->type == OBJ_COMMIT) {
699 struct commit *commit = (struct commit *)o;
700 if (!cutoff || cutoff < commit->date)
701 cutoff = commit->date;
704 trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL);
707 * This block marks all local refs as COMPLETE, and then recursively marks all
708 * parents of those refs as COMPLETE.
710 trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL);
712 for_each_rawref(mark_complete_oid, NULL);
713 for_each_cached_alternate(NULL, mark_alternate_complete);
714 commit_list_sort_by_date(&complete);
716 mark_recent_complete_commits(args, cutoff);
718 trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL);
721 * Mark all complete remote refs as common refs.
722 * Don't mark them common yet; the server has to be told so first.
724 trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL);
725 for (ref = *refs; ref; ref = ref->next) {
726 struct commit *c = deref_without_lazy_fetch(&ref->old_oid, 0);
728 if (!c || !(c->object.flags & COMPLETE))
731 negotiator->known_common(negotiator, c);
733 trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL);
735 save_commit_buffer = old_save_commit_buffer;
739 * Returns 1 if every object pointed to by the given remote refs is available
740 * locally and reachable from a local ref, and 0 otherwise.
742 static int everything_local(struct fetch_pack_args *args,
748 for (retval = 1, ref = *refs; ref ; ref = ref->next) {
749 const struct object_id *remote = &ref->old_oid;
752 o = lookup_object(the_repository, remote);
753 if (!o || !(o->flags & COMPLETE)) {
755 print_verbose(args, "want %s (%s)", oid_to_hex(remote),
759 print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
766 static int sideband_demux(int in, int out, void *data)
771 ret = recv_sideband("fetch-pack", xd[0], out);
776 static void create_promisor_file(const char *keep_name,
777 struct ref **sought, int nr_sought)
779 struct strbuf promisor_name = STRBUF_INIT;
782 strbuf_addstr(&promisor_name, keep_name);
783 suffix_stripped = strbuf_strip_suffix(&promisor_name, ".keep");
784 if (!suffix_stripped)
785 BUG("name of pack lockfile should end with .keep (was '%s')",
787 strbuf_addstr(&promisor_name, ".promisor");
789 write_promisor_file(promisor_name.buf, sought, nr_sought);
791 strbuf_release(&promisor_name);
794 static void parse_gitmodules_oids(int fd, struct oidset *gitmodules_oids)
796 int len = the_hash_algo->hexsz + 1; /* hash + NL */
799 char hex_hash[GIT_MAX_HEXSZ + 1];
800 int read_len = read_in_full(fd, hex_hash, len);
801 struct object_id oid;
807 die("invalid length read %d", read_len);
808 if (parse_oid_hex(hex_hash, &oid, &end) || *end != '\n')
810 oidset_insert(gitmodules_oids, &oid);
815 * If packfile URIs were provided, pass a non-NULL pointer to index_pack_args.
816 * The strings to pass as the --index-pack-arg arguments to http-fetch will be
817 * stored there. (It must be freed by the caller.)
819 static int get_pack(struct fetch_pack_args *args,
820 int xd[2], struct string_list *pack_lockfiles,
821 struct strvec *index_pack_args,
822 struct ref **sought, int nr_sought,
823 struct oidset *gitmodules_oids)
826 int do_keep = args->keep_pack;
827 const char *cmd_name;
828 struct pack_header header;
830 struct child_process cmd = CHILD_PROCESS_INIT;
831 int fsck_objects = 0;
834 memset(&demux, 0, sizeof(demux));
836 /* xd[] is talking with upload-pack; subprocess reads from
837 * xd[0], spits out band#2 to stderr, and feeds us band#1
838 * through demux->out.
840 demux.proc = sideband_demux;
843 demux.isolate_sigpipe = 1;
844 if (start_async(&demux))
845 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
850 if (!args->keep_pack && unpack_limit && !index_pack_args) {
852 if (read_pack_header(demux.out, &header))
853 die(_("protocol error: bad pack header"));
855 if (ntohl(header.hdr_entries) < unpack_limit)
861 if (alternate_shallow_file) {
862 strvec_push(&cmd.args, "--shallow-file");
863 strvec_push(&cmd.args, alternate_shallow_file);
866 if (fetch_fsck_objects >= 0
868 : transfer_fsck_objects >= 0
869 ? transfer_fsck_objects
873 if (do_keep || args->from_promisor || index_pack_args || fsck_objects) {
874 if (pack_lockfiles || fsck_objects)
876 cmd_name = "index-pack";
877 strvec_push(&cmd.args, cmd_name);
878 strvec_push(&cmd.args, "--stdin");
879 if (!args->quiet && !args->no_progress)
880 strvec_push(&cmd.args, "-v");
881 if (args->use_thin_pack)
882 strvec_push(&cmd.args, "--fix-thin");
883 if ((do_keep || index_pack_args) && (args->lock_pack || unpack_limit)) {
884 char hostname[HOST_NAME_MAX + 1];
885 if (xgethostname(hostname, sizeof(hostname)))
886 xsnprintf(hostname, sizeof(hostname), "localhost");
887 strvec_pushf(&cmd.args,
888 "--keep=fetch-pack %"PRIuMAX " on %s",
889 (uintmax_t)getpid(), hostname);
891 if (!index_pack_args && args->check_self_contained_and_connected)
892 strvec_push(&cmd.args, "--check-self-contained-and-connected");
895 * We cannot perform any connectivity checks because
896 * not all packs have been downloaded; let the caller
897 * have this responsibility.
899 args->check_self_contained_and_connected = 0;
901 if (args->from_promisor)
903 * create_promisor_file() may be called afterwards but
904 * we still need index-pack to know that this is a
905 * promisor pack. For example, if transfer.fsckobjects
906 * is true, index-pack needs to know that .gitmodules
907 * is a promisor object (so that it won't complain if
910 strvec_push(&cmd.args, "--promisor");
913 cmd_name = "unpack-objects";
914 strvec_push(&cmd.args, cmd_name);
915 if (args->quiet || args->no_progress)
916 strvec_push(&cmd.args, "-q");
917 args->check_self_contained_and_connected = 0;
921 strvec_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
922 ntohl(header.hdr_version),
923 ntohl(header.hdr_entries));
925 if (args->from_promisor || index_pack_args)
927 * We cannot use --strict in index-pack because it
928 * checks both broken objects and links, but we only
929 * want to check for broken objects.
931 strvec_push(&cmd.args, "--fsck-objects");
933 strvec_pushf(&cmd.args, "--strict%s",
937 if (index_pack_args) {
940 for (i = 0; i < cmd.args.nr; i++)
941 strvec_push(index_pack_args, cmd.args.v[i]);
946 if (start_command(&cmd))
947 die(_("fetch-pack: unable to fork off %s"), cmd_name);
948 if (do_keep && (pack_lockfiles || fsck_objects)) {
950 char *pack_lockfile = index_pack_lockfile(cmd.out, &is_well_formed);
953 die(_("fetch-pack: invalid index-pack output"));
955 string_list_append_nodup(pack_lockfiles, pack_lockfile);
956 parse_gitmodules_oids(cmd.out, gitmodules_oids);
961 /* Closed by start_command() */
964 ret = finish_command(&cmd);
965 if (!ret || (args->check_self_contained_and_connected && ret == 1))
966 args->self_contained_and_connected =
967 args->check_self_contained_and_connected &&
970 die(_("%s failed"), cmd_name);
971 if (use_sideband && finish_async(&demux))
972 die(_("error in sideband demultiplexer"));
975 * Now that index-pack has succeeded, write the promisor file using the
976 * obtained .keep filename if necessary
978 if (do_keep && pack_lockfiles && pack_lockfiles->nr && args->from_promisor)
979 create_promisor_file(pack_lockfiles->items[0].string, sought, nr_sought);
984 static int cmp_ref_by_name(const void *a_, const void *b_)
986 const struct ref *a = *((const struct ref **)a_);
987 const struct ref *b = *((const struct ref **)b_);
988 return strcmp(a->name, b->name);
991 static struct ref *do_fetch_pack(struct fetch_pack_args *args,
993 const struct ref *orig_ref,
994 struct ref **sought, int nr_sought,
995 struct shallow_info *si,
996 struct string_list *pack_lockfiles)
998 struct repository *r = the_repository;
999 struct ref *ref = copy_ref_list(orig_ref);
1000 struct object_id oid;
1001 const char *agent_feature;
1003 struct fetch_negotiator negotiator_alloc;
1004 struct fetch_negotiator *negotiator;
1006 negotiator = &negotiator_alloc;
1007 fetch_negotiator_init(r, negotiator);
1009 sort_ref_list(&ref, ref_compare_name);
1010 QSORT(sought, nr_sought, cmp_ref_by_name);
1012 if ((agent_feature = server_feature_value("agent", &agent_len))) {
1013 agent_supported = 1;
1015 print_verbose(args, _("Server version is %.*s"),
1016 agent_len, agent_feature);
1019 if (!server_supports("session-id"))
1022 if (server_supports("shallow"))
1023 print_verbose(args, _("Server supports %s"), "shallow");
1024 else if (args->depth > 0 || is_repository_shallow(r))
1025 die(_("Server does not support shallow clients"));
1026 if (args->depth > 0 || args->deepen_since || args->deepen_not)
1028 if (server_supports("multi_ack_detailed")) {
1029 print_verbose(args, _("Server supports %s"), "multi_ack_detailed");
1031 if (server_supports("no-done")) {
1032 print_verbose(args, _("Server supports %s"), "no-done");
1033 if (args->stateless_rpc)
1037 else if (server_supports("multi_ack")) {
1038 print_verbose(args, _("Server supports %s"), "multi_ack");
1041 if (server_supports("side-band-64k")) {
1042 print_verbose(args, _("Server supports %s"), "side-band-64k");
1045 else if (server_supports("side-band")) {
1046 print_verbose(args, _("Server supports %s"), "side-band");
1049 if (server_supports("allow-tip-sha1-in-want")) {
1050 print_verbose(args, _("Server supports %s"), "allow-tip-sha1-in-want");
1051 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1053 if (server_supports("allow-reachable-sha1-in-want")) {
1054 print_verbose(args, _("Server supports %s"), "allow-reachable-sha1-in-want");
1055 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1057 if (server_supports("thin-pack"))
1058 print_verbose(args, _("Server supports %s"), "thin-pack");
1060 args->use_thin_pack = 0;
1061 if (server_supports("no-progress"))
1062 print_verbose(args, _("Server supports %s"), "no-progress");
1064 args->no_progress = 0;
1065 if (server_supports("include-tag"))
1066 print_verbose(args, _("Server supports %s"), "include-tag");
1068 args->include_tag = 0;
1069 if (server_supports("ofs-delta"))
1070 print_verbose(args, _("Server supports %s"), "ofs-delta");
1072 prefer_ofs_delta = 0;
1074 if (server_supports("filter")) {
1075 server_supports_filtering = 1;
1076 print_verbose(args, _("Server supports %s"), "filter");
1077 } else if (args->filter_options.choice) {
1078 warning("filtering not recognized by server, ignoring");
1081 if (server_supports("deepen-since")) {
1082 print_verbose(args, _("Server supports %s"), "deepen-since");
1083 deepen_since_ok = 1;
1084 } else if (args->deepen_since)
1085 die(_("Server does not support --shallow-since"));
1086 if (server_supports("deepen-not")) {
1087 print_verbose(args, _("Server supports %s"), "deepen-not");
1089 } else if (args->deepen_not)
1090 die(_("Server does not support --shallow-exclude"));
1091 if (server_supports("deepen-relative"))
1092 print_verbose(args, _("Server supports %s"), "deepen-relative");
1093 else if (args->deepen_relative)
1094 die(_("Server does not support --deepen"));
1095 if (!server_supports_hash(the_hash_algo->name, NULL))
1096 die(_("Server does not support this repository's object format"));
1098 mark_complete_and_common_ref(negotiator, args, &ref);
1099 filter_refs(args, &ref, sought, nr_sought);
1100 if (everything_local(args, &ref)) {
1101 packet_flush(fd[1]);
1104 if (find_common(negotiator, args, fd, &oid, ref) < 0)
1105 if (!args->keep_pack)
1106 /* When cloning, it is not unusual to have
1109 warning(_("no common commits"));
1111 if (args->stateless_rpc)
1112 packet_flush(fd[1]);
1114 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1116 else if (si->nr_ours || si->nr_theirs) {
1117 if (args->reject_shallow_remote)
1118 die(_("source repository is shallow, reject to clone."));
1119 alternate_shallow_file = setup_temporary_shallow(si->shallow);
1121 alternate_shallow_file = NULL;
1122 if (get_pack(args, fd, pack_lockfiles, NULL, sought, nr_sought,
1123 &fsck_options.gitmodules_found))
1124 die(_("git fetch-pack: fetch failed."));
1125 if (fsck_finish(&fsck_options))
1130 negotiator->release(negotiator);
1134 static void add_shallow_requests(struct strbuf *req_buf,
1135 const struct fetch_pack_args *args)
1137 if (is_repository_shallow(the_repository))
1138 write_shallow_commits(req_buf, 1, NULL);
1139 if (args->depth > 0)
1140 packet_buf_write(req_buf, "deepen %d", args->depth);
1141 if (args->deepen_since) {
1142 timestamp_t max_age = approxidate(args->deepen_since);
1143 packet_buf_write(req_buf, "deepen-since %"PRItime, max_age);
1145 if (args->deepen_not) {
1147 for (i = 0; i < args->deepen_not->nr; i++) {
1148 struct string_list_item *s = args->deepen_not->items + i;
1149 packet_buf_write(req_buf, "deepen-not %s", s->string);
1152 if (args->deepen_relative)
1153 packet_buf_write(req_buf, "deepen-relative\n");
1156 static void add_wants(const struct ref *wants, struct strbuf *req_buf)
1158 int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0);
1160 for ( ; wants ; wants = wants->next) {
1161 const struct object_id *remote = &wants->old_oid;
1165 * If that object is complete (i.e. it is an ancestor of a
1166 * local ref), we tell them we have it but do not have to
1167 * tell them about its ancestors, which they already know
1170 * We use lookup_object here because we are only
1171 * interested in the case we *know* the object is
1172 * reachable and we have already scanned it.
1174 if (((o = lookup_object(the_repository, remote)) != NULL) &&
1175 (o->flags & COMPLETE)) {
1179 if (!use_ref_in_want || wants->exact_oid)
1180 packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote));
1182 packet_buf_write(req_buf, "want-ref %s\n", wants->name);
1186 static void add_common(struct strbuf *req_buf, struct oidset *common)
1188 struct oidset_iter iter;
1189 const struct object_id *oid;
1190 oidset_iter_init(common, &iter);
1192 while ((oid = oidset_iter_next(&iter))) {
1193 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1197 static int add_haves(struct fetch_negotiator *negotiator,
1199 struct strbuf *req_buf,
1200 int *haves_to_send, int *in_vain)
1203 int haves_added = 0;
1204 const struct object_id *oid;
1206 while ((oid = negotiator->next(negotiator))) {
1207 packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
1208 if (++haves_added >= *haves_to_send)
1212 *in_vain += haves_added;
1213 if (!haves_added || (seen_ack && *in_vain >= MAX_IN_VAIN)) {
1215 packet_buf_write(req_buf, "done\n");
1219 /* Increase haves to send on next round */
1220 *haves_to_send = next_flush(1, *haves_to_send);
1225 static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out,
1226 struct fetch_pack_args *args,
1227 const struct ref *wants, struct oidset *common,
1228 int *haves_to_send, int *in_vain,
1229 int sideband_all, int seen_ack)
1232 const char *hash_name;
1233 struct strbuf req_buf = STRBUF_INIT;
1235 if (server_supports_v2("fetch", 1))
1236 packet_buf_write(&req_buf, "command=fetch");
1237 if (server_supports_v2("agent", 0))
1238 packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized());
1239 if (advertise_sid && server_supports_v2("session-id", 0))
1240 packet_buf_write(&req_buf, "session-id=%s", trace2_session_id());
1241 if (args->server_options && args->server_options->nr &&
1242 server_supports_v2("server-option", 1)) {
1244 for (i = 0; i < args->server_options->nr; i++)
1245 packet_buf_write(&req_buf, "server-option=%s",
1246 args->server_options->items[i].string);
1249 if (server_feature_v2("object-format", &hash_name)) {
1250 int hash_algo = hash_algo_by_name(hash_name);
1251 if (hash_algo_by_ptr(the_hash_algo) != hash_algo)
1252 die(_("mismatched algorithms: client %s; server %s"),
1253 the_hash_algo->name, hash_name);
1254 packet_buf_write(&req_buf, "object-format=%s", the_hash_algo->name);
1255 } else if (hash_algo_by_ptr(the_hash_algo) != GIT_HASH_SHA1) {
1256 die(_("the server does not support algorithm '%s'"),
1257 the_hash_algo->name);
1260 packet_buf_delim(&req_buf);
1261 if (args->use_thin_pack)
1262 packet_buf_write(&req_buf, "thin-pack");
1263 if (args->no_progress)
1264 packet_buf_write(&req_buf, "no-progress");
1265 if (args->include_tag)
1266 packet_buf_write(&req_buf, "include-tag");
1267 if (prefer_ofs_delta)
1268 packet_buf_write(&req_buf, "ofs-delta");
1270 packet_buf_write(&req_buf, "sideband-all");
1272 /* Add shallow-info and deepen request */
1273 if (server_supports_feature("fetch", "shallow", 0))
1274 add_shallow_requests(&req_buf, args);
1275 else if (is_repository_shallow(the_repository) || args->deepen)
1276 die(_("Server does not support shallow requests"));
1279 if (server_supports_feature("fetch", "filter", 0) &&
1280 args->filter_options.choice) {
1282 expand_list_objects_filter_spec(&args->filter_options);
1283 print_verbose(args, _("Server supports filter"));
1284 packet_buf_write(&req_buf, "filter %s", spec);
1285 } else if (args->filter_options.choice) {
1286 warning("filtering not recognized by server, ignoring");
1289 if (server_supports_feature("fetch", "packfile-uris", 0)) {
1291 struct strbuf to_send = STRBUF_INIT;
1293 for (i = 0; i < uri_protocols.nr; i++) {
1294 const char *s = uri_protocols.items[i].string;
1296 if (!strcmp(s, "https") || !strcmp(s, "http")) {
1298 strbuf_addch(&to_send, ',');
1299 strbuf_addstr(&to_send, s);
1303 packet_buf_write(&req_buf, "packfile-uris %s",
1305 strbuf_release(&to_send);
1310 add_wants(wants, &req_buf);
1312 /* Add all of the common commits we've found in previous rounds */
1313 add_common(&req_buf, common);
1315 /* Add initial haves */
1316 ret = add_haves(negotiator, seen_ack, &req_buf,
1317 haves_to_send, in_vain);
1320 packet_buf_flush(&req_buf);
1321 if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0)
1322 die_errno(_("unable to write request to remote"));
1324 strbuf_release(&req_buf);
1329 * Processes a section header in a server's response and checks if it matches
1330 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1331 * not consumed); if 0, the line will be consumed and the function will die if
1332 * the section header doesn't match what was expected.
1334 static int process_section_header(struct packet_reader *reader,
1335 const char *section, int peek)
1339 if (packet_reader_peek(reader) != PACKET_READ_NORMAL)
1340 die(_("error reading section header '%s'"), section);
1342 ret = !strcmp(reader->line, section);
1346 die(_("expected '%s', received '%s'"),
1347 section, reader->line);
1348 packet_reader_read(reader);
1356 * No commit was found to be possessed by both the client and the
1357 * server, and "ready" was not received.
1362 * At least one commit was found to be possessed by both the client and
1363 * the server, and "ready" was not received.
1368 * "ready" was received, indicating that the server is ready to send
1369 * the packfile without any further negotiation.
1374 static enum common_found process_acks(struct fetch_negotiator *negotiator,
1375 struct packet_reader *reader,
1376 struct oidset *common)
1379 int received_ready = 0;
1380 int received_ack = 0;
1382 process_section_header(reader, "acknowledgments", 0);
1383 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1386 if (!strcmp(reader->line, "NAK"))
1389 if (skip_prefix(reader->line, "ACK ", &arg)) {
1390 struct object_id oid;
1392 if (!get_oid_hex(arg, &oid)) {
1393 struct commit *commit;
1394 oidset_insert(common, &oid);
1395 commit = lookup_commit(the_repository, &oid);
1397 negotiator->ack(negotiator, commit);
1402 if (!strcmp(reader->line, "ready")) {
1407 die(_("unexpected acknowledgment line: '%s'"), reader->line);
1410 if (reader->status != PACKET_READ_FLUSH &&
1411 reader->status != PACKET_READ_DELIM)
1412 die(_("error processing acks: %d"), reader->status);
1415 * If an "acknowledgments" section is sent, a packfile is sent if and
1416 * only if "ready" was sent in this section. The other sections
1417 * ("shallow-info" and "wanted-refs") are sent only if a packfile is
1418 * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH
1421 if (received_ready && reader->status != PACKET_READ_DELIM)
1422 die(_("expected packfile to be sent after 'ready'"));
1423 if (!received_ready && reader->status != PACKET_READ_FLUSH)
1424 die(_("expected no other sections to be sent after no 'ready'"));
1426 return received_ready ? READY :
1427 (received_ack ? COMMON_FOUND : NO_COMMON_FOUND);
1430 static void receive_shallow_info(struct fetch_pack_args *args,
1431 struct packet_reader *reader,
1432 struct oid_array *shallows,
1433 struct shallow_info *si)
1435 int unshallow_received = 0;
1437 process_section_header(reader, "shallow-info", 0);
1438 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1440 struct object_id oid;
1442 if (skip_prefix(reader->line, "shallow ", &arg)) {
1443 if (get_oid_hex(arg, &oid))
1444 die(_("invalid shallow line: %s"), reader->line);
1445 oid_array_append(shallows, &oid);
1448 if (skip_prefix(reader->line, "unshallow ", &arg)) {
1449 if (get_oid_hex(arg, &oid))
1450 die(_("invalid unshallow line: %s"), reader->line);
1451 if (!lookup_object(the_repository, &oid))
1452 die(_("object not found: %s"), reader->line);
1453 /* make sure that it is parsed as shallow */
1454 if (!parse_object(the_repository, &oid))
1455 die(_("error in object: %s"), reader->line);
1456 if (unregister_shallow(&oid))
1457 die(_("no shallow found: %s"), reader->line);
1458 unshallow_received = 1;
1461 die(_("expected shallow/unshallow, got %s"), reader->line);
1464 if (reader->status != PACKET_READ_FLUSH &&
1465 reader->status != PACKET_READ_DELIM)
1466 die(_("error processing shallow info: %d"), reader->status);
1468 if (args->deepen || unshallow_received) {
1470 * Treat these as shallow lines caused by our depth settings.
1471 * In v0, these lines cannot cause refs to be rejected; do the
1476 for (i = 0; i < shallows->nr; i++)
1477 register_shallow(the_repository, &shallows->oid[i]);
1478 setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
1481 } else if (shallows->nr) {
1483 * Treat these as shallow lines caused by the remote being
1484 * shallow. In v0, remote refs that reach these objects are
1485 * rejected (unless --update-shallow is set); do the same.
1487 prepare_shallow_info(si, shallows);
1488 if (si->nr_ours || si->nr_theirs) {
1489 if (args->reject_shallow_remote)
1490 die(_("source repository is shallow, reject to clone."));
1491 alternate_shallow_file =
1492 setup_temporary_shallow(si->shallow);
1494 alternate_shallow_file = NULL;
1496 alternate_shallow_file = NULL;
1500 static int cmp_name_ref(const void *name, const void *ref)
1502 return strcmp(name, (*(struct ref **)ref)->name);
1505 static void receive_wanted_refs(struct packet_reader *reader,
1506 struct ref **sought, int nr_sought)
1508 process_section_header(reader, "wanted-refs", 0);
1509 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1510 struct object_id oid;
1514 if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ')
1515 die(_("expected wanted-ref, got '%s'"), reader->line);
1517 found = bsearch(end, sought, nr_sought, sizeof(*sought),
1520 die(_("unexpected wanted-ref: '%s'"), reader->line);
1521 oidcpy(&(*found)->old_oid, &oid);
1524 if (reader->status != PACKET_READ_DELIM)
1525 die(_("error processing wanted refs: %d"), reader->status);
1528 static void receive_packfile_uris(struct packet_reader *reader,
1529 struct string_list *uris)
1531 process_section_header(reader, "packfile-uris", 0);
1532 while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
1533 if (reader->pktlen < the_hash_algo->hexsz ||
1534 reader->line[the_hash_algo->hexsz] != ' ')
1535 die("expected '<hash> <uri>', got: %s\n", reader->line);
1537 string_list_append(uris, reader->line);
1539 if (reader->status != PACKET_READ_DELIM)
1540 die("expected DELIM");
1544 FETCH_CHECK_LOCAL = 0,
1551 static void do_check_stateless_delimiter(const struct fetch_pack_args *args,
1552 struct packet_reader *reader)
1554 check_stateless_delimiter(args->stateless_rpc, reader,
1555 _("git fetch-pack: expected response end packet"));
1558 static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
1560 const struct ref *orig_ref,
1561 struct ref **sought, int nr_sought,
1562 struct oid_array *shallows,
1563 struct shallow_info *si,
1564 struct string_list *pack_lockfiles)
1566 struct repository *r = the_repository;
1567 struct ref *ref = copy_ref_list(orig_ref);
1568 enum fetch_state state = FETCH_CHECK_LOCAL;
1569 struct oidset common = OIDSET_INIT;
1570 struct packet_reader reader;
1571 int in_vain = 0, negotiation_started = 0;
1572 int haves_to_send = INITIAL_FLUSH;
1573 struct fetch_negotiator negotiator_alloc;
1574 struct fetch_negotiator *negotiator;
1576 struct string_list packfile_uris = STRING_LIST_INIT_DUP;
1578 struct strvec index_pack_args = STRVEC_INIT;
1580 negotiator = &negotiator_alloc;
1581 fetch_negotiator_init(r, negotiator);
1583 packet_reader_init(&reader, fd[0], NULL, 0,
1584 PACKET_READ_CHOMP_NEWLINE |
1585 PACKET_READ_DIE_ON_ERR_PACKET);
1586 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) &&
1587 server_supports_feature("fetch", "sideband-all", 0)) {
1588 reader.use_sideband = 1;
1589 reader.me = "fetch-pack";
1592 while (state != FETCH_DONE) {
1594 case FETCH_CHECK_LOCAL:
1595 sort_ref_list(&ref, ref_compare_name);
1596 QSORT(sought, nr_sought, cmp_ref_by_name);
1598 /* v2 supports these by default */
1599 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1601 if (args->depth > 0 || args->deepen_since || args->deepen_not)
1604 /* Filter 'ref' by 'sought' and those that aren't local */
1605 mark_complete_and_common_ref(negotiator, args, &ref);
1606 filter_refs(args, &ref, sought, nr_sought);
1607 if (everything_local(args, &ref))
1610 state = FETCH_SEND_REQUEST;
1612 mark_tips(negotiator, args->negotiation_tips);
1613 for_each_cached_alternate(negotiator,
1614 insert_one_alternate_object);
1616 case FETCH_SEND_REQUEST:
1617 if (!negotiation_started) {
1618 negotiation_started = 1;
1619 trace2_region_enter("fetch-pack",
1623 if (send_fetch_request(negotiator, fd[1], args, ref,
1625 &haves_to_send, &in_vain,
1626 reader.use_sideband,
1628 state = FETCH_GET_PACK;
1630 state = FETCH_PROCESS_ACKS;
1632 case FETCH_PROCESS_ACKS:
1633 /* Process ACKs/NAKs */
1634 switch (process_acks(negotiator, &reader, &common)) {
1637 * Don't check for response delimiter; get_pack() will
1638 * read the rest of this response.
1640 state = FETCH_GET_PACK;
1646 case NO_COMMON_FOUND:
1647 do_check_stateless_delimiter(args, &reader);
1648 state = FETCH_SEND_REQUEST;
1652 case FETCH_GET_PACK:
1653 trace2_region_leave("fetch-pack",
1656 /* Check for shallow-info section */
1657 if (process_section_header(&reader, "shallow-info", 1))
1658 receive_shallow_info(args, &reader, shallows, si);
1660 if (process_section_header(&reader, "wanted-refs", 1))
1661 receive_wanted_refs(&reader, sought, nr_sought);
1663 /* get the pack(s) */
1664 if (process_section_header(&reader, "packfile-uris", 1))
1665 receive_packfile_uris(&reader, &packfile_uris);
1666 process_section_header(&reader, "packfile", 0);
1667 if (get_pack(args, fd, pack_lockfiles,
1668 packfile_uris.nr ? &index_pack_args : NULL,
1669 sought, nr_sought, &fsck_options.gitmodules_found))
1670 die(_("git fetch-pack: fetch failed."));
1671 do_check_stateless_delimiter(args, &reader);
1680 for (i = 0; i < packfile_uris.nr; i++) {
1682 struct child_process cmd = CHILD_PROCESS_INIT;
1683 char packname[GIT_MAX_HEXSZ + 1];
1684 const char *uri = packfile_uris.items[i].string +
1685 the_hash_algo->hexsz + 1;
1687 strvec_push(&cmd.args, "http-fetch");
1688 strvec_pushf(&cmd.args, "--packfile=%.*s",
1689 (int) the_hash_algo->hexsz,
1690 packfile_uris.items[i].string);
1691 for (j = 0; j < index_pack_args.nr; j++)
1692 strvec_pushf(&cmd.args, "--index-pack-arg=%s",
1693 index_pack_args.v[j]);
1694 strvec_push(&cmd.args, uri);
1698 if (start_command(&cmd))
1699 die("fetch-pack: unable to spawn http-fetch");
1701 if (read_in_full(cmd.out, packname, 5) < 0 ||
1702 memcmp(packname, "keep\t", 5))
1703 die("fetch-pack: expected keep then TAB at start of http-fetch output");
1705 if (read_in_full(cmd.out, packname,
1706 the_hash_algo->hexsz + 1) < 0 ||
1707 packname[the_hash_algo->hexsz] != '\n')
1708 die("fetch-pack: expected hash then LF at end of http-fetch output");
1710 packname[the_hash_algo->hexsz] = '\0';
1712 parse_gitmodules_oids(cmd.out, &fsck_options.gitmodules_found);
1716 if (finish_command(&cmd))
1717 die("fetch-pack: unable to finish http-fetch");
1719 if (memcmp(packfile_uris.items[i].string, packname,
1720 the_hash_algo->hexsz))
1721 die("fetch-pack: pack downloaded from %s does not match expected hash %.*s",
1722 uri, (int) the_hash_algo->hexsz,
1723 packfile_uris.items[i].string);
1725 string_list_append_nodup(pack_lockfiles,
1726 xstrfmt("%s/pack/pack-%s.keep",
1727 get_object_directory(),
1730 string_list_clear(&packfile_uris, 0);
1731 strvec_clear(&index_pack_args);
1733 if (fsck_finish(&fsck_options))
1737 negotiator->release(negotiator);
1739 oidset_clear(&common);
1743 static int fetch_pack_config_cb(const char *var, const char *value, void *cb)
1745 if (strcmp(var, "fetch.fsck.skiplist") == 0) {
1748 if (git_config_pathname(&path, var, value))
1750 strbuf_addf(&fsck_msg_types, "%cskiplist=%s",
1751 fsck_msg_types.len ? ',' : '=', path);
1756 if (skip_prefix(var, "fetch.fsck.", &var)) {
1757 if (is_valid_msg_type(var, value))
1758 strbuf_addf(&fsck_msg_types, "%c%s=%s",
1759 fsck_msg_types.len ? ',' : '=', var, value);
1761 warning("Skipping unknown msg id '%s'", var);
1765 return git_default_config(var, value, cb);
1768 static void fetch_pack_config(void)
1770 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit);
1771 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit);
1772 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta);
1773 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects);
1774 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects);
1775 git_config_get_bool("transfer.advertisesid", &advertise_sid);
1776 if (!uri_protocols.nr) {
1779 if (!git_config_get_string("fetch.uriprotocols", &str) && str) {
1780 string_list_split(&uri_protocols, str, ',', -1);
1785 git_config(fetch_pack_config_cb, NULL);
1788 static void fetch_pack_setup(void)
1790 static int did_setup;
1793 fetch_pack_config();
1794 if (0 <= transfer_unpack_limit)
1795 unpack_limit = transfer_unpack_limit;
1796 else if (0 <= fetch_unpack_limit)
1797 unpack_limit = fetch_unpack_limit;
1801 static int remove_duplicates_in_refs(struct ref **ref, int nr)
1803 struct string_list names = STRING_LIST_INIT_NODUP;
1806 for (src = dst = 0; src < nr; src++) {
1807 struct string_list_item *item;
1808 item = string_list_insert(&names, ref[src]->name);
1810 continue; /* already have it */
1811 item->util = ref[src];
1813 ref[dst] = ref[src];
1816 for (src = dst; src < nr; src++)
1818 string_list_clear(&names, 0);
1822 static void update_shallow(struct fetch_pack_args *args,
1823 struct ref **sought, int nr_sought,
1824 struct shallow_info *si)
1826 struct oid_array ref = OID_ARRAY_INIT;
1830 if (args->deepen && alternate_shallow_file) {
1831 if (*alternate_shallow_file == '\0') { /* --unshallow */
1832 unlink_or_warn(git_path_shallow(the_repository));
1833 rollback_shallow_file(the_repository, &shallow_lock);
1835 commit_shallow_file(the_repository, &shallow_lock);
1836 alternate_shallow_file = NULL;
1840 if (!si->shallow || !si->shallow->nr)
1843 if (args->cloning) {
1845 * remote is shallow, but this is a clone, there are
1846 * no objects in repo to worry about. Accept any
1847 * shallow points that exist in the pack (iow in repo
1848 * after get_pack() and reprepare_packed_git())
1850 struct oid_array extra = OID_ARRAY_INIT;
1851 struct object_id *oid = si->shallow->oid;
1852 for (i = 0; i < si->shallow->nr; i++)
1853 if (has_object_file(&oid[i]))
1854 oid_array_append(&extra, &oid[i]);
1856 setup_alternate_shallow(&shallow_lock,
1857 &alternate_shallow_file,
1859 commit_shallow_file(the_repository, &shallow_lock);
1860 alternate_shallow_file = NULL;
1862 oid_array_clear(&extra);
1866 if (!si->nr_ours && !si->nr_theirs)
1869 remove_nonexistent_theirs_shallow(si);
1870 if (!si->nr_ours && !si->nr_theirs)
1872 for (i = 0; i < nr_sought; i++)
1873 oid_array_append(&ref, &sought[i]->old_oid);
1876 if (args->update_shallow) {
1878 * remote is also shallow, .git/shallow may be updated
1879 * so all refs can be accepted. Make sure we only add
1880 * shallow roots that are actually reachable from new
1883 struct oid_array extra = OID_ARRAY_INIT;
1884 struct object_id *oid = si->shallow->oid;
1885 assign_shallow_commits_to_refs(si, NULL, NULL);
1886 if (!si->nr_ours && !si->nr_theirs) {
1887 oid_array_clear(&ref);
1890 for (i = 0; i < si->nr_ours; i++)
1891 oid_array_append(&extra, &oid[si->ours[i]]);
1892 for (i = 0; i < si->nr_theirs; i++)
1893 oid_array_append(&extra, &oid[si->theirs[i]]);
1894 setup_alternate_shallow(&shallow_lock,
1895 &alternate_shallow_file,
1897 commit_shallow_file(the_repository, &shallow_lock);
1898 oid_array_clear(&extra);
1899 oid_array_clear(&ref);
1900 alternate_shallow_file = NULL;
1905 * remote is also shallow, check what ref is safe to update
1906 * without updating .git/shallow
1908 CALLOC_ARRAY(status, nr_sought);
1909 assign_shallow_commits_to_refs(si, NULL, status);
1910 if (si->nr_ours || si->nr_theirs) {
1911 for (i = 0; i < nr_sought; i++)
1913 sought[i]->status = REF_STATUS_REJECT_SHALLOW;
1916 oid_array_clear(&ref);
1919 static int iterate_ref_map(void *cb_data, struct object_id *oid)
1921 struct ref **rm = cb_data;
1922 struct ref *ref = *rm;
1925 return -1; /* end of the list */
1927 oidcpy(oid, &ref->old_oid);
1931 struct ref *fetch_pack(struct fetch_pack_args *args,
1933 const struct ref *ref,
1934 struct ref **sought, int nr_sought,
1935 struct oid_array *shallow,
1936 struct string_list *pack_lockfiles,
1937 enum protocol_version version)
1939 struct ref *ref_cpy;
1940 struct shallow_info si;
1941 struct oid_array shallows_scratch = OID_ARRAY_INIT;
1945 nr_sought = remove_duplicates_in_refs(sought, nr_sought);
1947 if (version != protocol_v2 && !ref) {
1948 packet_flush(fd[1]);
1949 die(_("no matching remote head"));
1951 if (version == protocol_v2) {
1953 BUG("Protocol V2 does not provide shallows at this point in the fetch");
1954 memset(&si, 0, sizeof(si));
1955 ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought,
1956 &shallows_scratch, &si,
1959 prepare_shallow_info(&si, shallow);
1960 ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
1961 &si, pack_lockfiles);
1963 reprepare_packed_git(the_repository);
1965 if (!args->cloning && args->deepen) {
1966 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1967 struct ref *iterator = ref_cpy;
1968 opt.shallow_file = alternate_shallow_file;
1970 opt.is_deepening_fetch = 1;
1971 if (check_connected(iterate_ref_map, &iterator, &opt)) {
1972 error(_("remote did not send all necessary objects"));
1975 rollback_shallow_file(the_repository, &shallow_lock);
1978 args->connectivity_checked = 1;
1981 update_shallow(args, sought, nr_sought, &si);
1983 clear_shallow_info(&si);
1984 oid_array_clear(&shallows_scratch);
1988 int report_unmatched_refs(struct ref **sought, int nr_sought)
1992 for (i = 0; i < nr_sought; i++) {
1995 switch (sought[i]->match_status) {
1998 case REF_NOT_MATCHED:
1999 error(_("no such remote ref %s"), sought[i]->name);
2001 case REF_UNADVERTISED_NOT_ALLOWED:
2002 error(_("Server does not allow request for unadvertised object %s"),