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"
26 #include "commit-reach.h"
27 #include "commit-graph.h"
29 #include "mergesort.h"
31 static int transfer_unpack_limit
= -1;
32 static int fetch_unpack_limit
= -1;
33 static int unpack_limit
= 100;
34 static int prefer_ofs_delta
= 1;
36 static int deepen_since_ok
;
37 static int deepen_not_ok
;
38 static int fetch_fsck_objects
= -1;
39 static int transfer_fsck_objects
= -1;
40 static int agent_supported
;
41 static int server_supports_filtering
;
42 static int advertise_sid
;
43 static struct shallow_lock shallow_lock
;
44 static const char *alternate_shallow_file
;
45 static struct fsck_options fsck_options
= FSCK_OPTIONS_MISSING_GITMODULES
;
46 static struct strbuf fsck_msg_types
= STRBUF_INIT
;
47 static struct string_list uri_protocols
= STRING_LIST_INIT_DUP
;
49 /* Remember to update object flag allocation in object.h */
50 #define COMPLETE (1U << 0)
51 #define ALTERNATE (1U << 1)
52 #define COMMON (1U << 6)
53 #define REACH_SCRATCH (1U << 7)
56 * After sending this many "have"s if we do not get any new ACK , we
57 * give up traversing our history.
59 #define MAX_IN_VAIN 256
61 static int multi_ack
, use_sideband
;
62 /* Allow specifying sha1 if it is a ref tip. */
63 #define ALLOW_TIP_SHA1 01
64 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
65 #define ALLOW_REACHABLE_SHA1 02
66 static unsigned int allow_unadvertised_object_request
;
68 __attribute__((format (printf
, 2, 3)))
69 static inline void print_verbose(const struct fetch_pack_args
*args
,
77 va_start(params
, fmt
);
78 vfprintf(stderr
, fmt
, params
);
83 struct alternate_object_cache
{
84 struct object
**items
;
88 static void cache_one_alternate(const struct object_id
*oid
,
91 struct alternate_object_cache
*cache
= vcache
;
92 struct object
*obj
= parse_object(the_repository
, oid
);
94 if (!obj
|| (obj
->flags
& ALTERNATE
))
97 obj
->flags
|= ALTERNATE
;
98 ALLOC_GROW(cache
->items
, cache
->nr
+ 1, cache
->alloc
);
99 cache
->items
[cache
->nr
++] = obj
;
102 static void for_each_cached_alternate(struct fetch_negotiator
*negotiator
,
103 void (*cb
)(struct fetch_negotiator
*,
106 static int initialized
;
107 static struct alternate_object_cache cache
;
111 for_each_alternate_ref(cache_one_alternate
, &cache
);
115 for (i
= 0; i
< cache
.nr
; i
++)
116 cb(negotiator
, cache
.items
[i
]);
119 static struct commit
*deref_without_lazy_fetch_extended(const struct object_id
*oid
,
120 int mark_tags_complete
,
121 enum object_type
*type
,
122 unsigned int oi_flags
)
124 struct object_info info
= { .typep
= type
};
125 struct commit
*commit
;
127 commit
= lookup_commit_in_graph(the_repository
, oid
);
132 if (oid_object_info_extended(the_repository
, oid
, &info
,
135 if (*type
== OBJ_TAG
) {
136 struct tag
*tag
= (struct tag
*)
137 parse_object(the_repository
, oid
);
141 if (mark_tags_complete
)
142 tag
->object
.flags
|= COMPLETE
;
143 oid
= &tag
->tagged
->oid
;
149 if (*type
== OBJ_COMMIT
) {
150 struct commit
*commit
= lookup_commit(the_repository
, oid
);
151 if (!commit
|| repo_parse_commit(the_repository
, commit
))
160 static struct commit
*deref_without_lazy_fetch(const struct object_id
*oid
,
161 int mark_tags_complete
)
163 enum object_type type
;
164 unsigned flags
= OBJECT_INFO_SKIP_FETCH_OBJECT
| OBJECT_INFO_QUICK
;
165 return deref_without_lazy_fetch_extended(oid
, mark_tags_complete
,
169 static int rev_list_insert_ref(struct fetch_negotiator
*negotiator
,
170 const struct object_id
*oid
)
172 struct commit
*c
= deref_without_lazy_fetch(oid
, 0);
175 negotiator
->add_tip(negotiator
, c
);
179 static int rev_list_insert_ref_oid(const char *refname
, const struct object_id
*oid
,
180 int flag
, void *cb_data
)
182 return rev_list_insert_ref(cb_data
, oid
);
193 static void consume_shallow_list(struct fetch_pack_args
*args
,
194 struct packet_reader
*reader
)
196 if (args
->stateless_rpc
&& args
->deepen
) {
197 /* If we sent a depth we will get back "duplicate"
198 * shallow and unshallow commands every time there
199 * is a block of have lines exchanged.
201 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
202 if (starts_with(reader
->line
, "shallow "))
204 if (starts_with(reader
->line
, "unshallow "))
206 die(_("git fetch-pack: expected shallow list"));
208 if (reader
->status
!= PACKET_READ_FLUSH
)
209 die(_("git fetch-pack: expected a flush packet after shallow list"));
213 static enum ack_type
get_ack(struct packet_reader
*reader
,
214 struct object_id
*result_oid
)
219 if (packet_reader_read(reader
) != PACKET_READ_NORMAL
)
220 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
221 len
= reader
->pktlen
;
223 if (!strcmp(reader
->line
, "NAK"))
225 if (skip_prefix(reader
->line
, "ACK ", &arg
)) {
227 if (!parse_oid_hex(arg
, result_oid
, &p
)) {
228 len
-= p
- reader
->line
;
231 if (strstr(p
, "continue"))
233 if (strstr(p
, "common"))
235 if (strstr(p
, "ready"))
240 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader
->line
);
243 static void send_request(struct fetch_pack_args
*args
,
244 int fd
, struct strbuf
*buf
)
246 if (args
->stateless_rpc
) {
247 send_sideband(fd
, -1, buf
->buf
, buf
->len
, LARGE_PACKET_MAX
);
250 if (write_in_full(fd
, buf
->buf
, buf
->len
) < 0)
251 die_errno(_("unable to write to remote"));
255 static void insert_one_alternate_object(struct fetch_negotiator
*negotiator
,
258 rev_list_insert_ref(negotiator
, &obj
->oid
);
261 #define INITIAL_FLUSH 16
262 #define PIPESAFE_FLUSH 32
263 #define LARGE_FLUSH 16384
265 static int next_flush(int stateless_rpc
, int count
)
268 if (count
< LARGE_FLUSH
)
271 count
= count
* 11 / 10;
273 if (count
< PIPESAFE_FLUSH
)
276 count
+= PIPESAFE_FLUSH
;
281 static void mark_tips(struct fetch_negotiator
*negotiator
,
282 const struct oid_array
*negotiation_tips
)
286 if (!negotiation_tips
) {
287 for_each_rawref(rev_list_insert_ref_oid
, negotiator
);
291 for (i
= 0; i
< negotiation_tips
->nr
; i
++)
292 rev_list_insert_ref(negotiator
, &negotiation_tips
->oid
[i
]);
296 static void send_filter(struct fetch_pack_args
*args
,
297 struct strbuf
*req_buf
,
298 int server_supports_filter
)
300 if (args
->filter_options
.choice
) {
302 expand_list_objects_filter_spec(&args
->filter_options
);
303 if (server_supports_filter
) {
304 print_verbose(args
, _("Server supports filter"));
305 packet_buf_write(req_buf
, "filter %s", spec
);
306 trace2_data_string("fetch", the_repository
,
307 "filter/effective", spec
);
309 warning("filtering not recognized by server, ignoring");
310 trace2_data_string("fetch", the_repository
,
311 "filter/unsupported", spec
);
314 trace2_data_string("fetch", the_repository
,
319 static int find_common(struct fetch_negotiator
*negotiator
,
320 struct fetch_pack_args
*args
,
321 int fd
[2], struct object_id
*result_oid
,
325 int count
= 0, flushes
= 0, flush_at
= INITIAL_FLUSH
, retval
;
326 int negotiation_round
= 0, haves
= 0;
327 const struct object_id
*oid
;
328 unsigned in_vain
= 0;
329 int got_continue
= 0;
331 struct strbuf req_buf
= STRBUF_INIT
;
332 size_t state_len
= 0;
333 struct packet_reader reader
;
335 if (args
->stateless_rpc
&& multi_ack
== 1)
336 die(_("the option '%s' requires '%s'"), "--stateless-rpc", "multi_ack_detailed");
338 packet_reader_init(&reader
, fd
[0], NULL
, 0,
339 PACKET_READ_CHOMP_NEWLINE
|
340 PACKET_READ_DIE_ON_ERR_PACKET
);
342 mark_tips(negotiator
, args
->negotiation_tips
);
343 for_each_cached_alternate(negotiator
, insert_one_alternate_object
);
346 for ( ; refs
; refs
= refs
->next
) {
347 struct object_id
*remote
= &refs
->old_oid
;
348 const char *remote_hex
;
351 if (!args
->refetch
) {
353 * If that object is complete (i.e. it is an ancestor of a
354 * local ref), we tell them we have it but do not have to
355 * tell them about its ancestors, which they already know
358 * We use lookup_object here because we are only
359 * interested in the case we *know* the object is
360 * reachable and we have already scanned it.
362 if (((o
= lookup_object(the_repository
, remote
)) != NULL
) &&
363 (o
->flags
& COMPLETE
)) {
368 remote_hex
= oid_to_hex(remote
);
370 struct strbuf c
= STRBUF_INIT
;
371 if (multi_ack
== 2) strbuf_addstr(&c
, " multi_ack_detailed");
372 if (multi_ack
== 1) strbuf_addstr(&c
, " multi_ack");
373 if (no_done
) strbuf_addstr(&c
, " no-done");
374 if (use_sideband
== 2) strbuf_addstr(&c
, " side-band-64k");
375 if (use_sideband
== 1) strbuf_addstr(&c
, " side-band");
376 if (args
->deepen_relative
) strbuf_addstr(&c
, " deepen-relative");
377 if (args
->use_thin_pack
) strbuf_addstr(&c
, " thin-pack");
378 if (args
->no_progress
) strbuf_addstr(&c
, " no-progress");
379 if (args
->include_tag
) strbuf_addstr(&c
, " include-tag");
380 if (prefer_ofs_delta
) strbuf_addstr(&c
, " ofs-delta");
381 if (deepen_since_ok
) strbuf_addstr(&c
, " deepen-since");
382 if (deepen_not_ok
) strbuf_addstr(&c
, " deepen-not");
383 if (agent_supported
) strbuf_addf(&c
, " agent=%s",
384 git_user_agent_sanitized());
386 strbuf_addf(&c
, " session-id=%s", trace2_session_id());
387 if (args
->filter_options
.choice
)
388 strbuf_addstr(&c
, " filter");
389 packet_buf_write(&req_buf
, "want %s%s\n", remote_hex
, c
.buf
);
392 packet_buf_write(&req_buf
, "want %s\n", remote_hex
);
397 strbuf_release(&req_buf
);
402 if (is_repository_shallow(the_repository
))
403 write_shallow_commits(&req_buf
, 1, NULL
);
405 packet_buf_write(&req_buf
, "deepen %d", args
->depth
);
406 if (args
->deepen_since
) {
407 timestamp_t max_age
= approxidate(args
->deepen_since
);
408 packet_buf_write(&req_buf
, "deepen-since %"PRItime
, max_age
);
410 if (args
->deepen_not
) {
412 for (i
= 0; i
< args
->deepen_not
->nr
; i
++) {
413 struct string_list_item
*s
= args
->deepen_not
->items
+ i
;
414 packet_buf_write(&req_buf
, "deepen-not %s", s
->string
);
417 send_filter(args
, &req_buf
, server_supports_filtering
);
418 packet_buf_flush(&req_buf
);
419 state_len
= req_buf
.len
;
423 struct object_id oid
;
425 send_request(args
, fd
[1], &req_buf
);
426 while (packet_reader_read(&reader
) == PACKET_READ_NORMAL
) {
427 if (skip_prefix(reader
.line
, "shallow ", &arg
)) {
428 if (get_oid_hex(arg
, &oid
))
429 die(_("invalid shallow line: %s"), reader
.line
);
430 register_shallow(the_repository
, &oid
);
433 if (skip_prefix(reader
.line
, "unshallow ", &arg
)) {
434 if (get_oid_hex(arg
, &oid
))
435 die(_("invalid unshallow line: %s"), reader
.line
);
436 if (!lookup_object(the_repository
, &oid
))
437 die(_("object not found: %s"), reader
.line
);
438 /* make sure that it is parsed as shallow */
439 if (!parse_object(the_repository
, &oid
))
440 die(_("error in object: %s"), reader
.line
);
441 if (unregister_shallow(&oid
))
442 die(_("no shallow found: %s"), reader
.line
);
445 die(_("expected shallow/unshallow, got %s"), reader
.line
);
447 } else if (!args
->stateless_rpc
)
448 send_request(args
, fd
[1], &req_buf
);
450 if (!args
->stateless_rpc
) {
451 /* If we aren't using the stateless-rpc interface
452 * we don't need to retain the headers.
454 strbuf_setlen(&req_buf
, 0);
458 trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository
);
461 while ((oid
= negotiator
->next(negotiator
))) {
462 packet_buf_write(&req_buf
, "have %s\n", oid_to_hex(oid
));
463 print_verbose(args
, "have %s", oid_to_hex(oid
));
466 if (flush_at
<= ++count
) {
470 trace2_region_enter_printf("negotiation_v0_v1", "round",
471 the_repository
, "%d",
473 trace2_data_intmax("negotiation_v0_v1", the_repository
,
474 "haves_added", haves
);
475 trace2_data_intmax("negotiation_v0_v1", the_repository
,
478 packet_buf_flush(&req_buf
);
479 send_request(args
, fd
[1], &req_buf
);
480 strbuf_setlen(&req_buf
, state_len
);
482 flush_at
= next_flush(args
->stateless_rpc
, count
);
485 * We keep one window "ahead" of the other side, and
486 * will wait for an ACK only on the next one
488 if (!args
->stateless_rpc
&& count
== INITIAL_FLUSH
)
491 consume_shallow_list(args
, &reader
);
493 ack
= get_ack(&reader
, result_oid
);
495 print_verbose(args
, _("got %s %d %s"), "ack",
496 ack
, oid_to_hex(result_oid
));
499 trace2_region_leave_printf("negotiation_v0_v1", "round",
500 the_repository
, "%d",
509 struct commit
*commit
=
510 lookup_commit(the_repository
,
515 die(_("invalid commit %s"), oid_to_hex(result_oid
));
516 was_common
= negotiator
->ack(negotiator
, commit
);
517 if (args
->stateless_rpc
520 /* We need to replay the have for this object
521 * on the next RPC request so the peer knows
522 * it is in common with us.
524 const char *hex
= oid_to_hex(result_oid
);
525 packet_buf_write(&req_buf
, "have %s\n", hex
);
526 state_len
= req_buf
.len
;
529 * Reset in_vain because an ack
530 * for this commit has not been
534 } else if (!args
->stateless_rpc
535 || ack
!= ACK_common
)
539 if (ack
== ACK_ready
)
546 trace2_region_leave_printf("negotiation_v0_v1", "round",
547 the_repository
, "%d",
549 if (got_continue
&& MAX_IN_VAIN
< in_vain
) {
550 print_verbose(args
, _("giving up"));
558 trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository
);
559 trace2_data_intmax("negotiation_v0_v1", the_repository
, "total_rounds",
561 if (!got_ready
|| !no_done
) {
562 packet_buf_write(&req_buf
, "done\n");
563 send_request(args
, fd
[1], &req_buf
);
565 print_verbose(args
, _("done"));
570 strbuf_release(&req_buf
);
572 if (!got_ready
|| !no_done
)
573 consume_shallow_list(args
, &reader
);
574 while (flushes
|| multi_ack
) {
575 int ack
= get_ack(&reader
, result_oid
);
577 print_verbose(args
, _("got %s (%d) %s"), "ack",
578 ack
, oid_to_hex(result_oid
));
586 /* it is no error to fetch into a completely empty repo */
587 return count
? retval
: 0;
590 static struct commit_list
*complete
;
592 static int mark_complete(const struct object_id
*oid
)
594 struct commit
*commit
= deref_without_lazy_fetch(oid
, 1);
596 if (commit
&& !(commit
->object
.flags
& COMPLETE
)) {
597 commit
->object
.flags
|= COMPLETE
;
598 commit_list_insert(commit
, &complete
);
603 static int mark_complete_oid(const char *refname
, const struct object_id
*oid
,
604 int flag
, void *cb_data
)
606 return mark_complete(oid
);
609 static void mark_recent_complete_commits(struct fetch_pack_args
*args
,
612 while (complete
&& cutoff
<= complete
->item
->date
) {
613 print_verbose(args
, _("Marking %s as complete"),
614 oid_to_hex(&complete
->item
->object
.oid
));
615 pop_most_recent_commit(&complete
, COMPLETE
);
619 static void add_refs_to_oidset(struct oidset
*oids
, struct ref
*refs
)
621 for (; refs
; refs
= refs
->next
)
622 oidset_insert(oids
, &refs
->old_oid
);
625 static int is_unmatched_ref(const struct ref
*ref
)
627 struct object_id oid
;
629 return ref
->match_status
== REF_NOT_MATCHED
&&
630 !parse_oid_hex(ref
->name
, &oid
, &p
) &&
632 oideq(&oid
, &ref
->old_oid
);
635 static void filter_refs(struct fetch_pack_args
*args
,
637 struct ref
**sought
, int nr_sought
)
639 struct ref
*newlist
= NULL
;
640 struct ref
**newtail
= &newlist
;
641 struct ref
*unmatched
= NULL
;
642 struct ref
*ref
, *next
;
643 struct oidset tip_oids
= OIDSET_INIT
;
645 int strict
= !(allow_unadvertised_object_request
&
646 (ALLOW_TIP_SHA1
| ALLOW_REACHABLE_SHA1
));
649 for (ref
= *refs
; ref
; ref
= next
) {
653 if (starts_with(ref
->name
, "refs/") &&
654 check_refname_format(ref
->name
, 0)) {
656 * trash or a peeled value; do not even add it to
662 while (i
< nr_sought
) {
663 int cmp
= strcmp(ref
->name
, sought
[i
]->name
);
665 break; /* definitely do not have it */
667 keep
= 1; /* definitely have it */
668 sought
[i
]->match_status
= REF_MATCHED
;
673 if (!keep
&& args
->fetch_all
&&
674 (!args
->deepen
|| !starts_with(ref
->name
, "refs/tags/")))
681 newtail
= &ref
->next
;
683 ref
->next
= unmatched
;
689 for (i
= 0; i
< nr_sought
; i
++) {
691 if (!is_unmatched_ref(ref
))
694 add_refs_to_oidset(&tip_oids
, unmatched
);
695 add_refs_to_oidset(&tip_oids
, newlist
);
700 /* Append unmatched requests to the list */
701 for (i
= 0; i
< nr_sought
; i
++) {
703 if (!is_unmatched_ref(ref
))
706 if (!strict
|| oidset_contains(&tip_oids
, &ref
->old_oid
)) {
707 ref
->match_status
= REF_MATCHED
;
708 *newtail
= copy_ref(ref
);
709 newtail
= &(*newtail
)->next
;
711 ref
->match_status
= REF_UNADVERTISED_NOT_ALLOWED
;
715 oidset_clear(&tip_oids
);
716 free_refs(unmatched
);
721 static void mark_alternate_complete(struct fetch_negotiator
*unused
,
724 mark_complete(&obj
->oid
);
727 struct loose_object_iter
{
728 struct oidset
*loose_object_set
;
733 * Mark recent commits available locally and reachable from a local ref as
736 * The cutoff time for recency is determined by this heuristic: it is the
737 * earliest commit time of the objects in refs that are commits and that we know
738 * the commit time of.
740 static void mark_complete_and_common_ref(struct fetch_negotiator
*negotiator
,
741 struct fetch_pack_args
*args
,
745 int old_save_commit_buffer
= save_commit_buffer
;
746 timestamp_t cutoff
= 0;
751 save_commit_buffer
= 0;
753 trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL
);
754 for (ref
= *refs
; ref
; ref
= ref
->next
) {
755 struct commit
*commit
;
757 commit
= lookup_commit_in_graph(the_repository
, &ref
->old_oid
);
761 if (!has_object_file_with_flags(&ref
->old_oid
,
763 OBJECT_INFO_SKIP_FETCH_OBJECT
))
765 o
= parse_object(the_repository
, &ref
->old_oid
);
766 if (!o
|| o
->type
!= OBJ_COMMIT
)
769 commit
= (struct commit
*)o
;
773 * We already have it -- which may mean that we were
774 * in sync with the other side at some time after
775 * that (it is OK if we guess wrong here).
777 if (!cutoff
|| cutoff
< commit
->date
)
778 cutoff
= commit
->date
;
780 trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL
);
783 * This block marks all local refs as COMPLETE, and then recursively marks all
784 * parents of those refs as COMPLETE.
786 trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL
);
788 for_each_rawref(mark_complete_oid
, NULL
);
789 for_each_cached_alternate(NULL
, mark_alternate_complete
);
790 commit_list_sort_by_date(&complete
);
792 mark_recent_complete_commits(args
, cutoff
);
794 trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL
);
797 * Mark all complete remote refs as common refs.
798 * Don't mark them common yet; the server has to be told so first.
800 trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL
);
801 for (ref
= *refs
; ref
; ref
= ref
->next
) {
802 struct commit
*c
= deref_without_lazy_fetch(&ref
->old_oid
, 0);
804 if (!c
|| !(c
->object
.flags
& COMPLETE
))
807 negotiator
->known_common(negotiator
, c
);
809 trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL
);
811 save_commit_buffer
= old_save_commit_buffer
;
815 * Returns 1 if every object pointed to by the given remote refs is available
816 * locally and reachable from a local ref, and 0 otherwise.
818 static int everything_local(struct fetch_pack_args
*args
,
824 for (retval
= 1, ref
= *refs
; ref
; ref
= ref
->next
) {
825 const struct object_id
*remote
= &ref
->old_oid
;
828 o
= lookup_object(the_repository
, remote
);
829 if (!o
|| !(o
->flags
& COMPLETE
)) {
831 print_verbose(args
, "want %s (%s)", oid_to_hex(remote
),
835 print_verbose(args
, _("already have %s (%s)"), oid_to_hex(remote
),
842 static int sideband_demux(int in
, int out
, void *data
)
847 ret
= recv_sideband("fetch-pack", xd
[0], out
);
852 static void create_promisor_file(const char *keep_name
,
853 struct ref
**sought
, int nr_sought
)
855 struct strbuf promisor_name
= STRBUF_INIT
;
858 strbuf_addstr(&promisor_name
, keep_name
);
859 suffix_stripped
= strbuf_strip_suffix(&promisor_name
, ".keep");
860 if (!suffix_stripped
)
861 BUG("name of pack lockfile should end with .keep (was '%s')",
863 strbuf_addstr(&promisor_name
, ".promisor");
865 write_promisor_file(promisor_name
.buf
, sought
, nr_sought
);
867 strbuf_release(&promisor_name
);
870 static void parse_gitmodules_oids(int fd
, struct oidset
*gitmodules_oids
)
872 int len
= the_hash_algo
->hexsz
+ 1; /* hash + NL */
875 char hex_hash
[GIT_MAX_HEXSZ
+ 1];
876 int read_len
= read_in_full(fd
, hex_hash
, len
);
877 struct object_id oid
;
883 die("invalid length read %d", read_len
);
884 if (parse_oid_hex(hex_hash
, &oid
, &end
) || *end
!= '\n')
886 oidset_insert(gitmodules_oids
, &oid
);
890 static void add_index_pack_keep_option(struct strvec
*args
)
892 char hostname
[HOST_NAME_MAX
+ 1];
894 if (xgethostname(hostname
, sizeof(hostname
)))
895 xsnprintf(hostname
, sizeof(hostname
), "localhost");
896 strvec_pushf(args
, "--keep=fetch-pack %"PRIuMAX
" on %s",
897 (uintmax_t)getpid(), hostname
);
901 * If packfile URIs were provided, pass a non-NULL pointer to index_pack_args.
902 * The strings to pass as the --index-pack-arg arguments to http-fetch will be
903 * stored there. (It must be freed by the caller.)
905 static int get_pack(struct fetch_pack_args
*args
,
906 int xd
[2], struct string_list
*pack_lockfiles
,
907 struct strvec
*index_pack_args
,
908 struct ref
**sought
, int nr_sought
,
909 struct oidset
*gitmodules_oids
)
912 int do_keep
= args
->keep_pack
;
913 const char *cmd_name
;
914 struct pack_header header
;
916 struct child_process cmd
= CHILD_PROCESS_INIT
;
917 int fsck_objects
= 0;
920 memset(&demux
, 0, sizeof(demux
));
922 /* xd[] is talking with upload-pack; subprocess reads from
923 * xd[0], spits out band#2 to stderr, and feeds us band#1
924 * through demux->out.
926 demux
.proc
= sideband_demux
;
929 demux
.isolate_sigpipe
= 1;
930 if (start_async(&demux
))
931 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
936 if (!args
->keep_pack
&& unpack_limit
&& !index_pack_args
) {
938 if (read_pack_header(demux
.out
, &header
))
939 die(_("protocol error: bad pack header"));
941 if (ntohl(header
.hdr_entries
) < unpack_limit
)
947 if (alternate_shallow_file
) {
948 strvec_push(&cmd
.args
, "--shallow-file");
949 strvec_push(&cmd
.args
, alternate_shallow_file
);
952 if (fetch_fsck_objects
>= 0
954 : transfer_fsck_objects
>= 0
955 ? transfer_fsck_objects
959 if (do_keep
|| args
->from_promisor
|| index_pack_args
|| fsck_objects
) {
960 if (pack_lockfiles
|| fsck_objects
)
962 cmd_name
= "index-pack";
963 strvec_push(&cmd
.args
, cmd_name
);
964 strvec_push(&cmd
.args
, "--stdin");
965 if (!args
->quiet
&& !args
->no_progress
)
966 strvec_push(&cmd
.args
, "-v");
967 if (args
->use_thin_pack
)
968 strvec_push(&cmd
.args
, "--fix-thin");
969 if ((do_keep
|| index_pack_args
) && (args
->lock_pack
|| unpack_limit
))
970 add_index_pack_keep_option(&cmd
.args
);
971 if (!index_pack_args
&& args
->check_self_contained_and_connected
)
972 strvec_push(&cmd
.args
, "--check-self-contained-and-connected");
975 * We cannot perform any connectivity checks because
976 * not all packs have been downloaded; let the caller
977 * have this responsibility.
979 args
->check_self_contained_and_connected
= 0;
981 if (args
->from_promisor
)
983 * create_promisor_file() may be called afterwards but
984 * we still need index-pack to know that this is a
985 * promisor pack. For example, if transfer.fsckobjects
986 * is true, index-pack needs to know that .gitmodules
987 * is a promisor object (so that it won't complain if
990 strvec_push(&cmd
.args
, "--promisor");
993 cmd_name
= "unpack-objects";
994 strvec_push(&cmd
.args
, cmd_name
);
995 if (args
->quiet
|| args
->no_progress
)
996 strvec_push(&cmd
.args
, "-q");
997 args
->check_self_contained_and_connected
= 0;
1001 strvec_pushf(&cmd
.args
, "--pack_header=%"PRIu32
",%"PRIu32
,
1002 ntohl(header
.hdr_version
),
1003 ntohl(header
.hdr_entries
));
1005 if (args
->from_promisor
|| index_pack_args
)
1007 * We cannot use --strict in index-pack because it
1008 * checks both broken objects and links, but we only
1009 * want to check for broken objects.
1011 strvec_push(&cmd
.args
, "--fsck-objects");
1013 strvec_pushf(&cmd
.args
, "--strict%s",
1014 fsck_msg_types
.buf
);
1017 if (index_pack_args
) {
1020 for (i
= 0; i
< cmd
.args
.nr
; i
++)
1021 strvec_push(index_pack_args
, cmd
.args
.v
[i
]);
1024 sigchain_push(SIGPIPE
, SIG_IGN
);
1028 if (start_command(&cmd
))
1029 die(_("fetch-pack: unable to fork off %s"), cmd_name
);
1030 if (do_keep
&& (pack_lockfiles
|| fsck_objects
)) {
1032 char *pack_lockfile
= index_pack_lockfile(cmd
.out
, &is_well_formed
);
1034 if (!is_well_formed
)
1035 die(_("fetch-pack: invalid index-pack output"));
1037 string_list_append_nodup(pack_lockfiles
, pack_lockfile
);
1038 parse_gitmodules_oids(cmd
.out
, gitmodules_oids
);
1043 /* Closed by start_command() */
1046 ret
= finish_command(&cmd
);
1047 if (!ret
|| (args
->check_self_contained_and_connected
&& ret
== 1))
1048 args
->self_contained_and_connected
=
1049 args
->check_self_contained_and_connected
&&
1052 die(_("%s failed"), cmd_name
);
1053 if (use_sideband
&& finish_async(&demux
))
1054 die(_("error in sideband demultiplexer"));
1056 sigchain_pop(SIGPIPE
);
1059 * Now that index-pack has succeeded, write the promisor file using the
1060 * obtained .keep filename if necessary
1062 if (do_keep
&& pack_lockfiles
&& pack_lockfiles
->nr
&& args
->from_promisor
)
1063 create_promisor_file(pack_lockfiles
->items
[0].string
, sought
, nr_sought
);
1068 static int ref_compare_name(const struct ref
*a
, const struct ref
*b
)
1070 return strcmp(a
->name
, b
->name
);
1073 DEFINE_LIST_SORT(static, sort_ref_list
, struct ref
, next
);
1075 static int cmp_ref_by_name(const void *a_
, const void *b_
)
1077 const struct ref
*a
= *((const struct ref
**)a_
);
1078 const struct ref
*b
= *((const struct ref
**)b_
);
1079 return strcmp(a
->name
, b
->name
);
1082 static struct ref
*do_fetch_pack(struct fetch_pack_args
*args
,
1084 const struct ref
*orig_ref
,
1085 struct ref
**sought
, int nr_sought
,
1086 struct shallow_info
*si
,
1087 struct string_list
*pack_lockfiles
)
1089 struct repository
*r
= the_repository
;
1090 struct ref
*ref
= copy_ref_list(orig_ref
);
1091 struct object_id oid
;
1092 const char *agent_feature
;
1094 struct fetch_negotiator negotiator_alloc
;
1095 struct fetch_negotiator
*negotiator
;
1097 negotiator
= &negotiator_alloc
;
1098 if (args
->refetch
) {
1099 fetch_negotiator_init_noop(negotiator
);
1101 fetch_negotiator_init(r
, negotiator
);
1104 sort_ref_list(&ref
, ref_compare_name
);
1105 QSORT(sought
, nr_sought
, cmp_ref_by_name
);
1107 if ((agent_feature
= server_feature_value("agent", &agent_len
))) {
1108 agent_supported
= 1;
1110 print_verbose(args
, _("Server version is %.*s"),
1111 agent_len
, agent_feature
);
1114 if (!server_supports("session-id"))
1117 if (server_supports("shallow"))
1118 print_verbose(args
, _("Server supports %s"), "shallow");
1119 else if (args
->depth
> 0 || is_repository_shallow(r
))
1120 die(_("Server does not support shallow clients"));
1121 if (args
->depth
> 0 || args
->deepen_since
|| args
->deepen_not
)
1123 if (server_supports("multi_ack_detailed")) {
1124 print_verbose(args
, _("Server supports %s"), "multi_ack_detailed");
1126 if (server_supports("no-done")) {
1127 print_verbose(args
, _("Server supports %s"), "no-done");
1128 if (args
->stateless_rpc
)
1132 else if (server_supports("multi_ack")) {
1133 print_verbose(args
, _("Server supports %s"), "multi_ack");
1136 if (server_supports("side-band-64k")) {
1137 print_verbose(args
, _("Server supports %s"), "side-band-64k");
1140 else if (server_supports("side-band")) {
1141 print_verbose(args
, _("Server supports %s"), "side-band");
1144 if (server_supports("allow-tip-sha1-in-want")) {
1145 print_verbose(args
, _("Server supports %s"), "allow-tip-sha1-in-want");
1146 allow_unadvertised_object_request
|= ALLOW_TIP_SHA1
;
1148 if (server_supports("allow-reachable-sha1-in-want")) {
1149 print_verbose(args
, _("Server supports %s"), "allow-reachable-sha1-in-want");
1150 allow_unadvertised_object_request
|= ALLOW_REACHABLE_SHA1
;
1152 if (server_supports("thin-pack"))
1153 print_verbose(args
, _("Server supports %s"), "thin-pack");
1155 args
->use_thin_pack
= 0;
1156 if (server_supports("no-progress"))
1157 print_verbose(args
, _("Server supports %s"), "no-progress");
1159 args
->no_progress
= 0;
1160 if (server_supports("include-tag"))
1161 print_verbose(args
, _("Server supports %s"), "include-tag");
1163 args
->include_tag
= 0;
1164 if (server_supports("ofs-delta"))
1165 print_verbose(args
, _("Server supports %s"), "ofs-delta");
1167 prefer_ofs_delta
= 0;
1169 if (server_supports("filter")) {
1170 server_supports_filtering
= 1;
1171 print_verbose(args
, _("Server supports %s"), "filter");
1172 } else if (args
->filter_options
.choice
) {
1173 warning("filtering not recognized by server, ignoring");
1176 if (server_supports("deepen-since")) {
1177 print_verbose(args
, _("Server supports %s"), "deepen-since");
1178 deepen_since_ok
= 1;
1179 } else if (args
->deepen_since
)
1180 die(_("Server does not support --shallow-since"));
1181 if (server_supports("deepen-not")) {
1182 print_verbose(args
, _("Server supports %s"), "deepen-not");
1184 } else if (args
->deepen_not
)
1185 die(_("Server does not support --shallow-exclude"));
1186 if (server_supports("deepen-relative"))
1187 print_verbose(args
, _("Server supports %s"), "deepen-relative");
1188 else if (args
->deepen_relative
)
1189 die(_("Server does not support --deepen"));
1190 if (!server_supports_hash(the_hash_algo
->name
, NULL
))
1191 die(_("Server does not support this repository's object format"));
1193 mark_complete_and_common_ref(negotiator
, args
, &ref
);
1194 filter_refs(args
, &ref
, sought
, nr_sought
);
1195 if (!args
->refetch
&& everything_local(args
, &ref
)) {
1196 packet_flush(fd
[1]);
1199 if (find_common(negotiator
, args
, fd
, &oid
, ref
) < 0)
1200 if (!args
->keep_pack
)
1201 /* When cloning, it is not unusual to have
1204 warning(_("no common commits"));
1206 if (args
->stateless_rpc
)
1207 packet_flush(fd
[1]);
1209 setup_alternate_shallow(&shallow_lock
, &alternate_shallow_file
,
1211 else if (si
->nr_ours
|| si
->nr_theirs
) {
1212 if (args
->reject_shallow_remote
)
1213 die(_("source repository is shallow, reject to clone."));
1214 alternate_shallow_file
= setup_temporary_shallow(si
->shallow
);
1216 alternate_shallow_file
= NULL
;
1217 if (get_pack(args
, fd
, pack_lockfiles
, NULL
, sought
, nr_sought
,
1218 &fsck_options
.gitmodules_found
))
1219 die(_("git fetch-pack: fetch failed."));
1220 if (fsck_finish(&fsck_options
))
1225 negotiator
->release(negotiator
);
1229 static void add_shallow_requests(struct strbuf
*req_buf
,
1230 const struct fetch_pack_args
*args
)
1232 if (is_repository_shallow(the_repository
))
1233 write_shallow_commits(req_buf
, 1, NULL
);
1234 if (args
->depth
> 0)
1235 packet_buf_write(req_buf
, "deepen %d", args
->depth
);
1236 if (args
->deepen_since
) {
1237 timestamp_t max_age
= approxidate(args
->deepen_since
);
1238 packet_buf_write(req_buf
, "deepen-since %"PRItime
, max_age
);
1240 if (args
->deepen_not
) {
1242 for (i
= 0; i
< args
->deepen_not
->nr
; i
++) {
1243 struct string_list_item
*s
= args
->deepen_not
->items
+ i
;
1244 packet_buf_write(req_buf
, "deepen-not %s", s
->string
);
1247 if (args
->deepen_relative
)
1248 packet_buf_write(req_buf
, "deepen-relative\n");
1251 static void add_wants(const struct ref
*wants
, struct strbuf
*req_buf
)
1253 int use_ref_in_want
= server_supports_feature("fetch", "ref-in-want", 0);
1255 for ( ; wants
; wants
= wants
->next
) {
1256 const struct object_id
*remote
= &wants
->old_oid
;
1260 * If that object is complete (i.e. it is an ancestor of a
1261 * local ref), we tell them we have it but do not have to
1262 * tell them about its ancestors, which they already know
1265 * We use lookup_object here because we are only
1266 * interested in the case we *know* the object is
1267 * reachable and we have already scanned it.
1269 if (((o
= lookup_object(the_repository
, remote
)) != NULL
) &&
1270 (o
->flags
& COMPLETE
)) {
1274 if (!use_ref_in_want
|| wants
->exact_oid
)
1275 packet_buf_write(req_buf
, "want %s\n", oid_to_hex(remote
));
1277 packet_buf_write(req_buf
, "want-ref %s\n", wants
->name
);
1281 static void add_common(struct strbuf
*req_buf
, struct oidset
*common
)
1283 struct oidset_iter iter
;
1284 const struct object_id
*oid
;
1285 oidset_iter_init(common
, &iter
);
1287 while ((oid
= oidset_iter_next(&iter
))) {
1288 packet_buf_write(req_buf
, "have %s\n", oid_to_hex(oid
));
1292 static int add_haves(struct fetch_negotiator
*negotiator
,
1293 struct strbuf
*req_buf
,
1296 int haves_added
= 0;
1297 const struct object_id
*oid
;
1299 while ((oid
= negotiator
->next(negotiator
))) {
1300 packet_buf_write(req_buf
, "have %s\n", oid_to_hex(oid
));
1301 if (++haves_added
>= *haves_to_send
)
1305 /* Increase haves to send on next round */
1306 *haves_to_send
= next_flush(1, *haves_to_send
);
1311 static void write_fetch_command_and_capabilities(struct strbuf
*req_buf
,
1312 const struct string_list
*server_options
)
1314 const char *hash_name
;
1316 if (server_supports_v2("fetch", 1))
1317 packet_buf_write(req_buf
, "command=fetch");
1318 if (server_supports_v2("agent", 0))
1319 packet_buf_write(req_buf
, "agent=%s", git_user_agent_sanitized());
1320 if (advertise_sid
&& server_supports_v2("session-id", 0))
1321 packet_buf_write(req_buf
, "session-id=%s", trace2_session_id());
1322 if (server_options
&& server_options
->nr
&&
1323 server_supports_v2("server-option", 1)) {
1325 for (i
= 0; i
< server_options
->nr
; i
++)
1326 packet_buf_write(req_buf
, "server-option=%s",
1327 server_options
->items
[i
].string
);
1330 if (server_feature_v2("object-format", &hash_name
)) {
1331 int hash_algo
= hash_algo_by_name(hash_name
);
1332 if (hash_algo_by_ptr(the_hash_algo
) != hash_algo
)
1333 die(_("mismatched algorithms: client %s; server %s"),
1334 the_hash_algo
->name
, hash_name
);
1335 packet_buf_write(req_buf
, "object-format=%s", the_hash_algo
->name
);
1336 } else if (hash_algo_by_ptr(the_hash_algo
) != GIT_HASH_SHA1
) {
1337 die(_("the server does not support algorithm '%s'"),
1338 the_hash_algo
->name
);
1340 packet_buf_delim(req_buf
);
1343 static int send_fetch_request(struct fetch_negotiator
*negotiator
, int fd_out
,
1344 struct fetch_pack_args
*args
,
1345 const struct ref
*wants
, struct oidset
*common
,
1346 int *haves_to_send
, int *in_vain
,
1347 int sideband_all
, int seen_ack
)
1351 struct strbuf req_buf
= STRBUF_INIT
;
1353 write_fetch_command_and_capabilities(&req_buf
, args
->server_options
);
1355 if (args
->use_thin_pack
)
1356 packet_buf_write(&req_buf
, "thin-pack");
1357 if (args
->no_progress
)
1358 packet_buf_write(&req_buf
, "no-progress");
1359 if (args
->include_tag
)
1360 packet_buf_write(&req_buf
, "include-tag");
1361 if (prefer_ofs_delta
)
1362 packet_buf_write(&req_buf
, "ofs-delta");
1364 packet_buf_write(&req_buf
, "sideband-all");
1366 /* Add shallow-info and deepen request */
1367 if (server_supports_feature("fetch", "shallow", 0))
1368 add_shallow_requests(&req_buf
, args
);
1369 else if (is_repository_shallow(the_repository
) || args
->deepen
)
1370 die(_("Server does not support shallow requests"));
1373 send_filter(args
, &req_buf
,
1374 server_supports_feature("fetch", "filter", 0));
1376 if (server_supports_feature("fetch", "packfile-uris", 0)) {
1378 struct strbuf to_send
= STRBUF_INIT
;
1380 for (i
= 0; i
< uri_protocols
.nr
; i
++) {
1381 const char *s
= uri_protocols
.items
[i
].string
;
1383 if (!strcmp(s
, "https") || !strcmp(s
, "http")) {
1385 strbuf_addch(&to_send
, ',');
1386 strbuf_addstr(&to_send
, s
);
1390 packet_buf_write(&req_buf
, "packfile-uris %s",
1392 strbuf_release(&to_send
);
1397 add_wants(wants
, &req_buf
);
1399 /* Add all of the common commits we've found in previous rounds */
1400 add_common(&req_buf
, common
);
1402 haves_added
= add_haves(negotiator
, &req_buf
, haves_to_send
);
1403 *in_vain
+= haves_added
;
1404 trace2_data_intmax("negotiation_v2", the_repository
, "haves_added", haves_added
);
1405 trace2_data_intmax("negotiation_v2", the_repository
, "in_vain", *in_vain
);
1406 if (!haves_added
|| (seen_ack
&& *in_vain
>= MAX_IN_VAIN
)) {
1408 packet_buf_write(&req_buf
, "done\n");
1413 packet_buf_flush(&req_buf
);
1414 if (write_in_full(fd_out
, req_buf
.buf
, req_buf
.len
) < 0)
1415 die_errno(_("unable to write request to remote"));
1417 strbuf_release(&req_buf
);
1422 * Processes a section header in a server's response and checks if it matches
1423 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1424 * not consumed); if 0, the line will be consumed and the function will die if
1425 * the section header doesn't match what was expected.
1427 static int process_section_header(struct packet_reader
*reader
,
1428 const char *section
, int peek
)
1432 if (packet_reader_peek(reader
) == PACKET_READ_NORMAL
&&
1433 !strcmp(reader
->line
, section
))
1439 die(_("expected '%s', received '%s'"),
1440 section
, reader
->line
);
1442 die(_("expected '%s'"), section
);
1444 packet_reader_read(reader
);
1450 static int process_ack(struct fetch_negotiator
*negotiator
,
1451 struct packet_reader
*reader
,
1452 struct object_id
*common_oid
,
1453 int *received_ready
)
1455 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1458 if (!strcmp(reader
->line
, "NAK"))
1461 if (skip_prefix(reader
->line
, "ACK ", &arg
)) {
1462 if (!get_oid_hex(arg
, common_oid
)) {
1463 struct commit
*commit
;
1464 commit
= lookup_commit(the_repository
, common_oid
);
1466 negotiator
->ack(negotiator
, commit
);
1471 if (!strcmp(reader
->line
, "ready")) {
1472 *received_ready
= 1;
1476 die(_("unexpected acknowledgment line: '%s'"), reader
->line
);
1479 if (reader
->status
!= PACKET_READ_FLUSH
&&
1480 reader
->status
!= PACKET_READ_DELIM
)
1481 die(_("error processing acks: %d"), reader
->status
);
1484 * If an "acknowledgments" section is sent, a packfile is sent if and
1485 * only if "ready" was sent in this section. The other sections
1486 * ("shallow-info" and "wanted-refs") are sent only if a packfile is
1487 * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH
1490 if (*received_ready
&& reader
->status
!= PACKET_READ_DELIM
)
1492 * TRANSLATORS: The parameter will be 'ready', a protocol
1495 die(_("expected packfile to be sent after '%s'"), "ready");
1496 if (!*received_ready
&& reader
->status
!= PACKET_READ_FLUSH
)
1498 * TRANSLATORS: The parameter will be 'ready', a protocol
1501 die(_("expected no other sections to be sent after no '%s'"), "ready");
1506 static void receive_shallow_info(struct fetch_pack_args
*args
,
1507 struct packet_reader
*reader
,
1508 struct oid_array
*shallows
,
1509 struct shallow_info
*si
)
1511 int unshallow_received
= 0;
1513 process_section_header(reader
, "shallow-info", 0);
1514 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1516 struct object_id oid
;
1518 if (skip_prefix(reader
->line
, "shallow ", &arg
)) {
1519 if (get_oid_hex(arg
, &oid
))
1520 die(_("invalid shallow line: %s"), reader
->line
);
1521 oid_array_append(shallows
, &oid
);
1524 if (skip_prefix(reader
->line
, "unshallow ", &arg
)) {
1525 if (get_oid_hex(arg
, &oid
))
1526 die(_("invalid unshallow line: %s"), reader
->line
);
1527 if (!lookup_object(the_repository
, &oid
))
1528 die(_("object not found: %s"), reader
->line
);
1529 /* make sure that it is parsed as shallow */
1530 if (!parse_object(the_repository
, &oid
))
1531 die(_("error in object: %s"), reader
->line
);
1532 if (unregister_shallow(&oid
))
1533 die(_("no shallow found: %s"), reader
->line
);
1534 unshallow_received
= 1;
1537 die(_("expected shallow/unshallow, got %s"), reader
->line
);
1540 if (reader
->status
!= PACKET_READ_FLUSH
&&
1541 reader
->status
!= PACKET_READ_DELIM
)
1542 die(_("error processing shallow info: %d"), reader
->status
);
1544 if (args
->deepen
|| unshallow_received
) {
1546 * Treat these as shallow lines caused by our depth settings.
1547 * In v0, these lines cannot cause refs to be rejected; do the
1552 for (i
= 0; i
< shallows
->nr
; i
++)
1553 register_shallow(the_repository
, &shallows
->oid
[i
]);
1554 setup_alternate_shallow(&shallow_lock
, &alternate_shallow_file
,
1557 } else if (shallows
->nr
) {
1559 * Treat these as shallow lines caused by the remote being
1560 * shallow. In v0, remote refs that reach these objects are
1561 * rejected (unless --update-shallow is set); do the same.
1563 prepare_shallow_info(si
, shallows
);
1564 if (si
->nr_ours
|| si
->nr_theirs
) {
1565 if (args
->reject_shallow_remote
)
1566 die(_("source repository is shallow, reject to clone."));
1567 alternate_shallow_file
=
1568 setup_temporary_shallow(si
->shallow
);
1570 alternate_shallow_file
= NULL
;
1572 alternate_shallow_file
= NULL
;
1576 static int cmp_name_ref(const void *name
, const void *ref
)
1578 return strcmp(name
, (*(struct ref
**)ref
)->name
);
1581 static void receive_wanted_refs(struct packet_reader
*reader
,
1582 struct ref
**sought
, int nr_sought
)
1584 process_section_header(reader
, "wanted-refs", 0);
1585 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1586 struct object_id oid
;
1590 if (parse_oid_hex(reader
->line
, &oid
, &end
) || *end
++ != ' ')
1591 die(_("expected wanted-ref, got '%s'"), reader
->line
);
1593 found
= bsearch(end
, sought
, nr_sought
, sizeof(*sought
),
1596 die(_("unexpected wanted-ref: '%s'"), reader
->line
);
1597 oidcpy(&(*found
)->old_oid
, &oid
);
1600 if (reader
->status
!= PACKET_READ_DELIM
)
1601 die(_("error processing wanted refs: %d"), reader
->status
);
1604 static void receive_packfile_uris(struct packet_reader
*reader
,
1605 struct string_list
*uris
)
1607 process_section_header(reader
, "packfile-uris", 0);
1608 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1609 if (reader
->pktlen
< the_hash_algo
->hexsz
||
1610 reader
->line
[the_hash_algo
->hexsz
] != ' ')
1611 die("expected '<hash> <uri>', got: %s\n", reader
->line
);
1613 string_list_append(uris
, reader
->line
);
1615 if (reader
->status
!= PACKET_READ_DELIM
)
1616 die("expected DELIM");
1620 FETCH_CHECK_LOCAL
= 0,
1627 static void do_check_stateless_delimiter(int stateless_rpc
,
1628 struct packet_reader
*reader
)
1630 check_stateless_delimiter(stateless_rpc
, reader
,
1631 _("git fetch-pack: expected response end packet"));
1634 static struct ref
*do_fetch_pack_v2(struct fetch_pack_args
*args
,
1636 const struct ref
*orig_ref
,
1637 struct ref
**sought
, int nr_sought
,
1638 struct oid_array
*shallows
,
1639 struct shallow_info
*si
,
1640 struct string_list
*pack_lockfiles
)
1642 struct repository
*r
= the_repository
;
1643 struct ref
*ref
= copy_ref_list(orig_ref
);
1644 enum fetch_state state
= FETCH_CHECK_LOCAL
;
1645 struct oidset common
= OIDSET_INIT
;
1646 struct packet_reader reader
;
1647 int in_vain
= 0, negotiation_started
= 0;
1648 int negotiation_round
= 0;
1649 int haves_to_send
= INITIAL_FLUSH
;
1650 struct fetch_negotiator negotiator_alloc
;
1651 struct fetch_negotiator
*negotiator
;
1653 struct object_id common_oid
;
1654 int received_ready
= 0;
1655 struct string_list packfile_uris
= STRING_LIST_INIT_DUP
;
1657 struct strvec index_pack_args
= STRVEC_INIT
;
1659 negotiator
= &negotiator_alloc
;
1661 fetch_negotiator_init_noop(negotiator
);
1663 fetch_negotiator_init(r
, negotiator
);
1665 packet_reader_init(&reader
, fd
[0], NULL
, 0,
1666 PACKET_READ_CHOMP_NEWLINE
|
1667 PACKET_READ_DIE_ON_ERR_PACKET
);
1668 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) &&
1669 server_supports_feature("fetch", "sideband-all", 0)) {
1670 reader
.use_sideband
= 1;
1671 reader
.me
= "fetch-pack";
1674 while (state
!= FETCH_DONE
) {
1676 case FETCH_CHECK_LOCAL
:
1677 sort_ref_list(&ref
, ref_compare_name
);
1678 QSORT(sought
, nr_sought
, cmp_ref_by_name
);
1680 /* v2 supports these by default */
1681 allow_unadvertised_object_request
|= ALLOW_REACHABLE_SHA1
;
1683 if (args
->depth
> 0 || args
->deepen_since
|| args
->deepen_not
)
1686 /* Filter 'ref' by 'sought' and those that aren't local */
1687 mark_complete_and_common_ref(negotiator
, args
, &ref
);
1688 filter_refs(args
, &ref
, sought
, nr_sought
);
1689 if (!args
->refetch
&& everything_local(args
, &ref
))
1692 state
= FETCH_SEND_REQUEST
;
1694 mark_tips(negotiator
, args
->negotiation_tips
);
1695 for_each_cached_alternate(negotiator
,
1696 insert_one_alternate_object
);
1698 case FETCH_SEND_REQUEST
:
1699 if (!negotiation_started
) {
1700 negotiation_started
= 1;
1701 trace2_region_enter("fetch-pack",
1705 negotiation_round
++;
1706 trace2_region_enter_printf("negotiation_v2", "round",
1707 the_repository
, "%d",
1709 if (send_fetch_request(negotiator
, fd
[1], args
, ref
,
1711 &haves_to_send
, &in_vain
,
1712 reader
.use_sideband
,
1714 trace2_region_leave_printf("negotiation_v2", "round",
1715 the_repository
, "%d",
1717 state
= FETCH_GET_PACK
;
1720 state
= FETCH_PROCESS_ACKS
;
1722 case FETCH_PROCESS_ACKS
:
1723 /* Process ACKs/NAKs */
1724 process_section_header(&reader
, "acknowledgments", 0);
1725 while (process_ack(negotiator
, &reader
, &common_oid
,
1729 oidset_insert(&common
, &common_oid
);
1731 trace2_region_leave_printf("negotiation_v2", "round",
1732 the_repository
, "%d",
1734 if (received_ready
) {
1736 * Don't check for response delimiter; get_pack() will
1737 * read the rest of this response.
1739 state
= FETCH_GET_PACK
;
1741 do_check_stateless_delimiter(args
->stateless_rpc
, &reader
);
1742 state
= FETCH_SEND_REQUEST
;
1745 case FETCH_GET_PACK
:
1746 trace2_region_leave("fetch-pack",
1749 trace2_data_intmax("negotiation_v2", the_repository
,
1750 "total_rounds", negotiation_round
);
1751 /* Check for shallow-info section */
1752 if (process_section_header(&reader
, "shallow-info", 1))
1753 receive_shallow_info(args
, &reader
, shallows
, si
);
1755 if (process_section_header(&reader
, "wanted-refs", 1))
1756 receive_wanted_refs(&reader
, sought
, nr_sought
);
1758 /* get the pack(s) */
1759 if (git_env_bool("GIT_TRACE_REDACT", 1))
1760 reader
.options
|= PACKET_READ_REDACT_URI_PATH
;
1761 if (process_section_header(&reader
, "packfile-uris", 1))
1762 receive_packfile_uris(&reader
, &packfile_uris
);
1763 /* We don't expect more URIs. Reset to avoid expensive URI check. */
1764 reader
.options
&= ~PACKET_READ_REDACT_URI_PATH
;
1766 process_section_header(&reader
, "packfile", 0);
1769 * this is the final request we'll make of the server;
1770 * do a half-duplex shutdown to indicate that they can
1771 * hang up as soon as the pack is sent.
1776 if (get_pack(args
, fd
, pack_lockfiles
,
1777 packfile_uris
.nr
? &index_pack_args
: NULL
,
1778 sought
, nr_sought
, &fsck_options
.gitmodules_found
))
1779 die(_("git fetch-pack: fetch failed."));
1780 do_check_stateless_delimiter(args
->stateless_rpc
, &reader
);
1789 for (i
= 0; i
< packfile_uris
.nr
; i
++) {
1791 struct child_process cmd
= CHILD_PROCESS_INIT
;
1792 char packname
[GIT_MAX_HEXSZ
+ 1];
1793 const char *uri
= packfile_uris
.items
[i
].string
+
1794 the_hash_algo
->hexsz
+ 1;
1796 strvec_push(&cmd
.args
, "http-fetch");
1797 strvec_pushf(&cmd
.args
, "--packfile=%.*s",
1798 (int) the_hash_algo
->hexsz
,
1799 packfile_uris
.items
[i
].string
);
1800 for (j
= 0; j
< index_pack_args
.nr
; j
++)
1801 strvec_pushf(&cmd
.args
, "--index-pack-arg=%s",
1802 index_pack_args
.v
[j
]);
1803 strvec_push(&cmd
.args
, uri
);
1807 if (start_command(&cmd
))
1808 die("fetch-pack: unable to spawn http-fetch");
1810 if (read_in_full(cmd
.out
, packname
, 5) < 0 ||
1811 memcmp(packname
, "keep\t", 5))
1812 die("fetch-pack: expected keep then TAB at start of http-fetch output");
1814 if (read_in_full(cmd
.out
, packname
,
1815 the_hash_algo
->hexsz
+ 1) < 0 ||
1816 packname
[the_hash_algo
->hexsz
] != '\n')
1817 die("fetch-pack: expected hash then LF at end of http-fetch output");
1819 packname
[the_hash_algo
->hexsz
] = '\0';
1821 parse_gitmodules_oids(cmd
.out
, &fsck_options
.gitmodules_found
);
1825 if (finish_command(&cmd
))
1826 die("fetch-pack: unable to finish http-fetch");
1828 if (memcmp(packfile_uris
.items
[i
].string
, packname
,
1829 the_hash_algo
->hexsz
))
1830 die("fetch-pack: pack downloaded from %s does not match expected hash %.*s",
1831 uri
, (int) the_hash_algo
->hexsz
,
1832 packfile_uris
.items
[i
].string
);
1834 string_list_append_nodup(pack_lockfiles
,
1835 xstrfmt("%s/pack/pack-%s.keep",
1836 get_object_directory(),
1839 string_list_clear(&packfile_uris
, 0);
1840 strvec_clear(&index_pack_args
);
1842 if (fsck_finish(&fsck_options
))
1846 negotiator
->release(negotiator
);
1848 oidset_clear(&common
);
1852 static int fetch_pack_config_cb(const char *var
, const char *value
, void *cb
)
1854 if (strcmp(var
, "fetch.fsck.skiplist") == 0) {
1857 if (git_config_pathname(&path
, var
, value
))
1859 strbuf_addf(&fsck_msg_types
, "%cskiplist=%s",
1860 fsck_msg_types
.len
? ',' : '=', path
);
1865 if (skip_prefix(var
, "fetch.fsck.", &var
)) {
1866 if (is_valid_msg_type(var
, value
))
1867 strbuf_addf(&fsck_msg_types
, "%c%s=%s",
1868 fsck_msg_types
.len
? ',' : '=', var
, value
);
1870 warning("Skipping unknown msg id '%s'", var
);
1874 return git_default_config(var
, value
, cb
);
1877 static void fetch_pack_config(void)
1879 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit
);
1880 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit
);
1881 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta
);
1882 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects
);
1883 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects
);
1884 git_config_get_bool("transfer.advertisesid", &advertise_sid
);
1885 if (!uri_protocols
.nr
) {
1888 if (!git_config_get_string("fetch.uriprotocols", &str
) && str
) {
1889 string_list_split(&uri_protocols
, str
, ',', -1);
1894 git_config(fetch_pack_config_cb
, NULL
);
1897 static void fetch_pack_setup(void)
1899 static int did_setup
;
1902 fetch_pack_config();
1903 if (0 <= transfer_unpack_limit
)
1904 unpack_limit
= transfer_unpack_limit
;
1905 else if (0 <= fetch_unpack_limit
)
1906 unpack_limit
= fetch_unpack_limit
;
1910 static int remove_duplicates_in_refs(struct ref
**ref
, int nr
)
1912 struct string_list names
= STRING_LIST_INIT_NODUP
;
1915 for (src
= dst
= 0; src
< nr
; src
++) {
1916 struct string_list_item
*item
;
1917 item
= string_list_insert(&names
, ref
[src
]->name
);
1919 continue; /* already have it */
1920 item
->util
= ref
[src
];
1922 ref
[dst
] = ref
[src
];
1925 for (src
= dst
; src
< nr
; src
++)
1927 string_list_clear(&names
, 0);
1931 static void update_shallow(struct fetch_pack_args
*args
,
1932 struct ref
**sought
, int nr_sought
,
1933 struct shallow_info
*si
)
1935 struct oid_array ref
= OID_ARRAY_INIT
;
1939 if (args
->deepen
&& alternate_shallow_file
) {
1940 if (*alternate_shallow_file
== '\0') { /* --unshallow */
1941 unlink_or_warn(git_path_shallow(the_repository
));
1942 rollback_shallow_file(the_repository
, &shallow_lock
);
1944 commit_shallow_file(the_repository
, &shallow_lock
);
1945 alternate_shallow_file
= NULL
;
1949 if (!si
->shallow
|| !si
->shallow
->nr
)
1952 if (args
->cloning
) {
1954 * remote is shallow, but this is a clone, there are
1955 * no objects in repo to worry about. Accept any
1956 * shallow points that exist in the pack (iow in repo
1957 * after get_pack() and reprepare_packed_git())
1959 struct oid_array extra
= OID_ARRAY_INIT
;
1960 struct object_id
*oid
= si
->shallow
->oid
;
1961 for (i
= 0; i
< si
->shallow
->nr
; i
++)
1962 if (has_object_file(&oid
[i
]))
1963 oid_array_append(&extra
, &oid
[i
]);
1965 setup_alternate_shallow(&shallow_lock
,
1966 &alternate_shallow_file
,
1968 commit_shallow_file(the_repository
, &shallow_lock
);
1969 alternate_shallow_file
= NULL
;
1971 oid_array_clear(&extra
);
1975 if (!si
->nr_ours
&& !si
->nr_theirs
)
1978 remove_nonexistent_theirs_shallow(si
);
1979 if (!si
->nr_ours
&& !si
->nr_theirs
)
1981 for (i
= 0; i
< nr_sought
; i
++)
1982 oid_array_append(&ref
, &sought
[i
]->old_oid
);
1985 if (args
->update_shallow
) {
1987 * remote is also shallow, .git/shallow may be updated
1988 * so all refs can be accepted. Make sure we only add
1989 * shallow roots that are actually reachable from new
1992 struct oid_array extra
= OID_ARRAY_INIT
;
1993 struct object_id
*oid
= si
->shallow
->oid
;
1994 assign_shallow_commits_to_refs(si
, NULL
, NULL
);
1995 if (!si
->nr_ours
&& !si
->nr_theirs
) {
1996 oid_array_clear(&ref
);
1999 for (i
= 0; i
< si
->nr_ours
; i
++)
2000 oid_array_append(&extra
, &oid
[si
->ours
[i
]]);
2001 for (i
= 0; i
< si
->nr_theirs
; i
++)
2002 oid_array_append(&extra
, &oid
[si
->theirs
[i
]]);
2003 setup_alternate_shallow(&shallow_lock
,
2004 &alternate_shallow_file
,
2006 commit_shallow_file(the_repository
, &shallow_lock
);
2007 oid_array_clear(&extra
);
2008 oid_array_clear(&ref
);
2009 alternate_shallow_file
= NULL
;
2014 * remote is also shallow, check what ref is safe to update
2015 * without updating .git/shallow
2017 CALLOC_ARRAY(status
, nr_sought
);
2018 assign_shallow_commits_to_refs(si
, NULL
, status
);
2019 if (si
->nr_ours
|| si
->nr_theirs
) {
2020 for (i
= 0; i
< nr_sought
; i
++)
2022 sought
[i
]->status
= REF_STATUS_REJECT_SHALLOW
;
2025 oid_array_clear(&ref
);
2028 static const struct object_id
*iterate_ref_map(void *cb_data
)
2030 struct ref
**rm
= cb_data
;
2031 struct ref
*ref
= *rm
;
2036 return &ref
->old_oid
;
2039 struct ref
*fetch_pack(struct fetch_pack_args
*args
,
2041 const struct ref
*ref
,
2042 struct ref
**sought
, int nr_sought
,
2043 struct oid_array
*shallow
,
2044 struct string_list
*pack_lockfiles
,
2045 enum protocol_version version
)
2047 struct ref
*ref_cpy
;
2048 struct shallow_info si
;
2049 struct oid_array shallows_scratch
= OID_ARRAY_INIT
;
2053 nr_sought
= remove_duplicates_in_refs(sought
, nr_sought
);
2055 if (version
!= protocol_v2
&& !ref
) {
2056 packet_flush(fd
[1]);
2057 die(_("no matching remote head"));
2059 if (version
== protocol_v2
) {
2061 BUG("Protocol V2 does not provide shallows at this point in the fetch");
2062 memset(&si
, 0, sizeof(si
));
2063 ref_cpy
= do_fetch_pack_v2(args
, fd
, ref
, sought
, nr_sought
,
2064 &shallows_scratch
, &si
,
2067 prepare_shallow_info(&si
, shallow
);
2068 ref_cpy
= do_fetch_pack(args
, fd
, ref
, sought
, nr_sought
,
2069 &si
, pack_lockfiles
);
2071 reprepare_packed_git(the_repository
);
2073 if (!args
->cloning
&& args
->deepen
) {
2074 struct check_connected_options opt
= CHECK_CONNECTED_INIT
;
2075 struct ref
*iterator
= ref_cpy
;
2076 opt
.shallow_file
= alternate_shallow_file
;
2078 opt
.is_deepening_fetch
= 1;
2079 if (check_connected(iterate_ref_map
, &iterator
, &opt
)) {
2080 error(_("remote did not send all necessary objects"));
2083 rollback_shallow_file(the_repository
, &shallow_lock
);
2086 args
->connectivity_checked
= 1;
2089 update_shallow(args
, sought
, nr_sought
, &si
);
2091 clear_shallow_info(&si
);
2092 oid_array_clear(&shallows_scratch
);
2096 static int add_to_object_array(const struct object_id
*oid
, void *data
)
2098 struct object_array
*a
= data
;
2100 add_object_array(lookup_object(the_repository
, oid
), "", a
);
2104 static void clear_common_flag(struct oidset
*s
)
2106 struct oidset_iter iter
;
2107 const struct object_id
*oid
;
2108 oidset_iter_init(s
, &iter
);
2110 while ((oid
= oidset_iter_next(&iter
))) {
2111 struct object
*obj
= lookup_object(the_repository
, oid
);
2112 obj
->flags
&= ~COMMON
;
2116 void negotiate_using_fetch(const struct oid_array
*negotiation_tips
,
2117 const struct string_list
*server_options
,
2120 struct oidset
*acked_commits
)
2122 struct fetch_negotiator negotiator
;
2123 struct packet_reader reader
;
2124 struct object_array nt_object_array
= OBJECT_ARRAY_INIT
;
2125 struct strbuf req_buf
= STRBUF_INIT
;
2126 int haves_to_send
= INITIAL_FLUSH
;
2129 int last_iteration
= 0;
2130 int negotiation_round
= 0;
2131 timestamp_t min_generation
= GENERATION_NUMBER_INFINITY
;
2133 fetch_negotiator_init(the_repository
, &negotiator
);
2134 mark_tips(&negotiator
, negotiation_tips
);
2136 packet_reader_init(&reader
, fd
[0], NULL
, 0,
2137 PACKET_READ_CHOMP_NEWLINE
|
2138 PACKET_READ_DIE_ON_ERR_PACKET
);
2140 oid_array_for_each((struct oid_array
*) negotiation_tips
,
2141 add_to_object_array
,
2144 trace2_region_enter("fetch-pack", "negotiate_using_fetch", the_repository
);
2145 while (!last_iteration
) {
2147 struct object_id common_oid
;
2148 int received_ready
= 0;
2150 negotiation_round
++;
2152 trace2_region_enter_printf("negotiate_using_fetch", "round",
2153 the_repository
, "%d",
2155 strbuf_reset(&req_buf
);
2156 write_fetch_command_and_capabilities(&req_buf
, server_options
);
2158 packet_buf_write(&req_buf
, "wait-for-done");
2160 haves_added
= add_haves(&negotiator
, &req_buf
, &haves_to_send
);
2161 in_vain
+= haves_added
;
2162 if (!haves_added
|| (seen_ack
&& in_vain
>= MAX_IN_VAIN
))
2165 trace2_data_intmax("negotiate_using_fetch", the_repository
,
2166 "haves_added", haves_added
);
2167 trace2_data_intmax("negotiate_using_fetch", the_repository
,
2168 "in_vain", in_vain
);
2171 packet_buf_flush(&req_buf
);
2172 if (write_in_full(fd
[1], req_buf
.buf
, req_buf
.len
) < 0)
2173 die_errno(_("unable to write request to remote"));
2175 /* Process ACKs/NAKs */
2176 process_section_header(&reader
, "acknowledgments", 0);
2177 while (process_ack(&negotiator
, &reader
, &common_oid
,
2179 struct commit
*commit
= lookup_commit(the_repository
,
2182 timestamp_t generation
;
2184 parse_commit_or_die(commit
);
2185 commit
->object
.flags
|= COMMON
;
2186 generation
= commit_graph_generation(commit
);
2187 if (generation
< min_generation
)
2188 min_generation
= generation
;
2192 oidset_insert(acked_commits
, &common_oid
);
2195 die(_("unexpected 'ready' from remote"));
2197 do_check_stateless_delimiter(stateless_rpc
, &reader
);
2198 if (can_all_from_reach_with_flag(&nt_object_array
, COMMON
,
2202 trace2_region_leave_printf("negotiation", "round",
2203 the_repository
, "%d",
2206 trace2_region_enter("fetch-pack", "negotiate_using_fetch", the_repository
);
2207 trace2_data_intmax("negotiate_using_fetch", the_repository
,
2208 "total_rounds", negotiation_round
);
2209 clear_common_flag(acked_commits
);
2210 strbuf_release(&req_buf
);
2213 int report_unmatched_refs(struct ref
**sought
, int nr_sought
)
2217 for (i
= 0; i
< nr_sought
; i
++) {
2220 switch (sought
[i
]->match_status
) {
2223 case REF_NOT_MATCHED
:
2224 error(_("no such remote ref %s"), sought
[i
]->name
);
2226 case REF_UNADVERTISED_NOT_ALLOWED
:
2227 error(_("Server does not allow request for unadvertised object %s"),