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 strbuf fsck_msg_types
= STRBUF_INIT
;
42 static struct string_list uri_protocols
= STRING_LIST_INIT_DUP
;
44 /* Remember to update object flag allocation in object.h */
45 #define COMPLETE (1U << 0)
46 #define ALTERNATE (1U << 1)
49 * After sending this many "have"s if we do not get any new ACK , we
50 * give up traversing our history.
52 #define MAX_IN_VAIN 256
54 static int multi_ack
, use_sideband
;
55 /* Allow specifying sha1 if it is a ref tip. */
56 #define ALLOW_TIP_SHA1 01
57 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
58 #define ALLOW_REACHABLE_SHA1 02
59 static unsigned int allow_unadvertised_object_request
;
61 __attribute__((format (printf
, 2, 3)))
62 static inline void print_verbose(const struct fetch_pack_args
*args
,
70 va_start(params
, fmt
);
71 vfprintf(stderr
, fmt
, params
);
76 struct alternate_object_cache
{
77 struct object
**items
;
81 static void cache_one_alternate(const struct object_id
*oid
,
84 struct alternate_object_cache
*cache
= vcache
;
85 struct object
*obj
= parse_object(the_repository
, oid
);
87 if (!obj
|| (obj
->flags
& ALTERNATE
))
90 obj
->flags
|= ALTERNATE
;
91 ALLOC_GROW(cache
->items
, cache
->nr
+ 1, cache
->alloc
);
92 cache
->items
[cache
->nr
++] = obj
;
95 static void for_each_cached_alternate(struct fetch_negotiator
*negotiator
,
96 void (*cb
)(struct fetch_negotiator
*,
99 static int initialized
;
100 static struct alternate_object_cache cache
;
104 for_each_alternate_ref(cache_one_alternate
, &cache
);
108 for (i
= 0; i
< cache
.nr
; i
++)
109 cb(negotiator
, cache
.items
[i
]);
112 static struct commit
*deref_without_lazy_fetch(const struct object_id
*oid
,
113 int mark_tags_complete
)
115 enum object_type type
;
116 struct object_info info
= { .typep
= &type
};
119 if (oid_object_info_extended(the_repository
, oid
, &info
,
120 OBJECT_INFO_SKIP_FETCH_OBJECT
| OBJECT_INFO_QUICK
))
122 if (type
== OBJ_TAG
) {
123 struct tag
*tag
= (struct tag
*)
124 parse_object(the_repository
, oid
);
128 if (mark_tags_complete
)
129 tag
->object
.flags
|= COMPLETE
;
130 oid
= &tag
->tagged
->oid
;
135 if (type
== OBJ_COMMIT
)
136 return (struct commit
*) parse_object(the_repository
, oid
);
140 static int rev_list_insert_ref(struct fetch_negotiator
*negotiator
,
141 const struct object_id
*oid
)
143 struct commit
*c
= deref_without_lazy_fetch(oid
, 0);
146 negotiator
->add_tip(negotiator
, c
);
150 static int rev_list_insert_ref_oid(const char *refname
, const struct object_id
*oid
,
151 int flag
, void *cb_data
)
153 return rev_list_insert_ref(cb_data
, oid
);
164 static void consume_shallow_list(struct fetch_pack_args
*args
,
165 struct packet_reader
*reader
)
167 if (args
->stateless_rpc
&& args
->deepen
) {
168 /* If we sent a depth we will get back "duplicate"
169 * shallow and unshallow commands every time there
170 * is a block of have lines exchanged.
172 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
173 if (starts_with(reader
->line
, "shallow "))
175 if (starts_with(reader
->line
, "unshallow "))
177 die(_("git fetch-pack: expected shallow list"));
179 if (reader
->status
!= PACKET_READ_FLUSH
)
180 die(_("git fetch-pack: expected a flush packet after shallow list"));
184 static enum ack_type
get_ack(struct packet_reader
*reader
,
185 struct object_id
*result_oid
)
190 if (packet_reader_read(reader
) != PACKET_READ_NORMAL
)
191 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
192 len
= reader
->pktlen
;
194 if (!strcmp(reader
->line
, "NAK"))
196 if (skip_prefix(reader
->line
, "ACK ", &arg
)) {
198 if (!parse_oid_hex(arg
, result_oid
, &p
)) {
199 len
-= p
- reader
->line
;
202 if (strstr(p
, "continue"))
204 if (strstr(p
, "common"))
206 if (strstr(p
, "ready"))
211 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader
->line
);
214 static void send_request(struct fetch_pack_args
*args
,
215 int fd
, struct strbuf
*buf
)
217 if (args
->stateless_rpc
) {
218 send_sideband(fd
, -1, buf
->buf
, buf
->len
, LARGE_PACKET_MAX
);
221 if (write_in_full(fd
, buf
->buf
, buf
->len
) < 0)
222 die_errno(_("unable to write to remote"));
226 static void insert_one_alternate_object(struct fetch_negotiator
*negotiator
,
229 rev_list_insert_ref(negotiator
, &obj
->oid
);
232 #define INITIAL_FLUSH 16
233 #define PIPESAFE_FLUSH 32
234 #define LARGE_FLUSH 16384
236 static int next_flush(int stateless_rpc
, int count
)
239 if (count
< LARGE_FLUSH
)
242 count
= count
* 11 / 10;
244 if (count
< PIPESAFE_FLUSH
)
247 count
+= PIPESAFE_FLUSH
;
252 static void mark_tips(struct fetch_negotiator
*negotiator
,
253 const struct oid_array
*negotiation_tips
)
257 if (!negotiation_tips
) {
258 for_each_rawref(rev_list_insert_ref_oid
, negotiator
);
262 for (i
= 0; i
< negotiation_tips
->nr
; i
++)
263 rev_list_insert_ref(negotiator
, &negotiation_tips
->oid
[i
]);
267 static int find_common(struct fetch_negotiator
*negotiator
,
268 struct fetch_pack_args
*args
,
269 int fd
[2], struct object_id
*result_oid
,
273 int count
= 0, flushes
= 0, flush_at
= INITIAL_FLUSH
, retval
;
274 const struct object_id
*oid
;
275 unsigned in_vain
= 0;
276 int got_continue
= 0;
278 struct strbuf req_buf
= STRBUF_INIT
;
279 size_t state_len
= 0;
280 struct packet_reader reader
;
282 if (args
->stateless_rpc
&& multi_ack
== 1)
283 die(_("--stateless-rpc requires multi_ack_detailed"));
285 packet_reader_init(&reader
, fd
[0], NULL
, 0,
286 PACKET_READ_CHOMP_NEWLINE
|
287 PACKET_READ_DIE_ON_ERR_PACKET
);
289 mark_tips(negotiator
, args
->negotiation_tips
);
290 for_each_cached_alternate(negotiator
, insert_one_alternate_object
);
293 for ( ; refs
; refs
= refs
->next
) {
294 struct object_id
*remote
= &refs
->old_oid
;
295 const char *remote_hex
;
299 * If that object is complete (i.e. it is an ancestor of a
300 * local ref), we tell them we have it but do not have to
301 * tell them about its ancestors, which they already know
304 * We use lookup_object here because we are only
305 * interested in the case we *know* the object is
306 * reachable and we have already scanned it.
308 if (((o
= lookup_object(the_repository
, remote
)) != NULL
) &&
309 (o
->flags
& COMPLETE
)) {
313 remote_hex
= oid_to_hex(remote
);
315 struct strbuf c
= STRBUF_INIT
;
316 if (multi_ack
== 2) strbuf_addstr(&c
, " multi_ack_detailed");
317 if (multi_ack
== 1) strbuf_addstr(&c
, " multi_ack");
318 if (no_done
) strbuf_addstr(&c
, " no-done");
319 if (use_sideband
== 2) strbuf_addstr(&c
, " side-band-64k");
320 if (use_sideband
== 1) strbuf_addstr(&c
, " side-band");
321 if (args
->deepen_relative
) strbuf_addstr(&c
, " deepen-relative");
322 if (args
->use_thin_pack
) strbuf_addstr(&c
, " thin-pack");
323 if (args
->no_progress
) strbuf_addstr(&c
, " no-progress");
324 if (args
->include_tag
) strbuf_addstr(&c
, " include-tag");
325 if (prefer_ofs_delta
) strbuf_addstr(&c
, " ofs-delta");
326 if (deepen_since_ok
) strbuf_addstr(&c
, " deepen-since");
327 if (deepen_not_ok
) strbuf_addstr(&c
, " deepen-not");
328 if (agent_supported
) strbuf_addf(&c
, " agent=%s",
329 git_user_agent_sanitized());
331 strbuf_addf(&c
, " session-id=%s", trace2_session_id());
332 if (args
->filter_options
.choice
)
333 strbuf_addstr(&c
, " filter");
334 packet_buf_write(&req_buf
, "want %s%s\n", remote_hex
, c
.buf
);
337 packet_buf_write(&req_buf
, "want %s\n", remote_hex
);
342 strbuf_release(&req_buf
);
347 if (is_repository_shallow(the_repository
))
348 write_shallow_commits(&req_buf
, 1, NULL
);
350 packet_buf_write(&req_buf
, "deepen %d", args
->depth
);
351 if (args
->deepen_since
) {
352 timestamp_t max_age
= approxidate(args
->deepen_since
);
353 packet_buf_write(&req_buf
, "deepen-since %"PRItime
, max_age
);
355 if (args
->deepen_not
) {
357 for (i
= 0; i
< args
->deepen_not
->nr
; i
++) {
358 struct string_list_item
*s
= args
->deepen_not
->items
+ i
;
359 packet_buf_write(&req_buf
, "deepen-not %s", s
->string
);
362 if (server_supports_filtering
&& args
->filter_options
.choice
) {
364 expand_list_objects_filter_spec(&args
->filter_options
);
365 packet_buf_write(&req_buf
, "filter %s", spec
);
367 packet_buf_flush(&req_buf
);
368 state_len
= req_buf
.len
;
372 struct object_id oid
;
374 send_request(args
, fd
[1], &req_buf
);
375 while (packet_reader_read(&reader
) == PACKET_READ_NORMAL
) {
376 if (skip_prefix(reader
.line
, "shallow ", &arg
)) {
377 if (get_oid_hex(arg
, &oid
))
378 die(_("invalid shallow line: %s"), reader
.line
);
379 register_shallow(the_repository
, &oid
);
382 if (skip_prefix(reader
.line
, "unshallow ", &arg
)) {
383 if (get_oid_hex(arg
, &oid
))
384 die(_("invalid unshallow line: %s"), reader
.line
);
385 if (!lookup_object(the_repository
, &oid
))
386 die(_("object not found: %s"), reader
.line
);
387 /* make sure that it is parsed as shallow */
388 if (!parse_object(the_repository
, &oid
))
389 die(_("error in object: %s"), reader
.line
);
390 if (unregister_shallow(&oid
))
391 die(_("no shallow found: %s"), reader
.line
);
394 die(_("expected shallow/unshallow, got %s"), reader
.line
);
396 } else if (!args
->stateless_rpc
)
397 send_request(args
, fd
[1], &req_buf
);
399 if (!args
->stateless_rpc
) {
400 /* If we aren't using the stateless-rpc interface
401 * we don't need to retain the headers.
403 strbuf_setlen(&req_buf
, 0);
407 trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository
);
410 while ((oid
= negotiator
->next(negotiator
))) {
411 packet_buf_write(&req_buf
, "have %s\n", oid_to_hex(oid
));
412 print_verbose(args
, "have %s", oid_to_hex(oid
));
414 if (flush_at
<= ++count
) {
417 packet_buf_flush(&req_buf
);
418 send_request(args
, fd
[1], &req_buf
);
419 strbuf_setlen(&req_buf
, state_len
);
421 flush_at
= next_flush(args
->stateless_rpc
, count
);
424 * We keep one window "ahead" of the other side, and
425 * will wait for an ACK only on the next one
427 if (!args
->stateless_rpc
&& count
== INITIAL_FLUSH
)
430 consume_shallow_list(args
, &reader
);
432 ack
= get_ack(&reader
, result_oid
);
434 print_verbose(args
, _("got %s %d %s"), "ack",
435 ack
, oid_to_hex(result_oid
));
445 struct commit
*commit
=
446 lookup_commit(the_repository
,
451 die(_("invalid commit %s"), oid_to_hex(result_oid
));
452 was_common
= negotiator
->ack(negotiator
, commit
);
453 if (args
->stateless_rpc
456 /* We need to replay the have for this object
457 * on the next RPC request so the peer knows
458 * it is in common with us.
460 const char *hex
= oid_to_hex(result_oid
);
461 packet_buf_write(&req_buf
, "have %s\n", hex
);
462 state_len
= req_buf
.len
;
464 * Reset in_vain because an ack
465 * for this commit has not been
469 } else if (!args
->stateless_rpc
470 || ack
!= ACK_common
)
474 if (ack
== ACK_ready
)
481 if (got_continue
&& MAX_IN_VAIN
< in_vain
) {
482 print_verbose(args
, _("giving up"));
490 trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository
);
491 if (!got_ready
|| !no_done
) {
492 packet_buf_write(&req_buf
, "done\n");
493 send_request(args
, fd
[1], &req_buf
);
495 print_verbose(args
, _("done"));
500 strbuf_release(&req_buf
);
502 if (!got_ready
|| !no_done
)
503 consume_shallow_list(args
, &reader
);
504 while (flushes
|| multi_ack
) {
505 int ack
= get_ack(&reader
, result_oid
);
507 print_verbose(args
, _("got %s (%d) %s"), "ack",
508 ack
, oid_to_hex(result_oid
));
516 /* it is no error to fetch into a completely empty repo */
517 return count
? retval
: 0;
520 static struct commit_list
*complete
;
522 static int mark_complete(const struct object_id
*oid
)
524 struct commit
*commit
= deref_without_lazy_fetch(oid
, 1);
526 if (commit
&& !(commit
->object
.flags
& COMPLETE
)) {
527 commit
->object
.flags
|= COMPLETE
;
528 commit_list_insert(commit
, &complete
);
533 static int mark_complete_oid(const char *refname
, const struct object_id
*oid
,
534 int flag
, void *cb_data
)
536 return mark_complete(oid
);
539 static void mark_recent_complete_commits(struct fetch_pack_args
*args
,
542 while (complete
&& cutoff
<= complete
->item
->date
) {
543 print_verbose(args
, _("Marking %s as complete"),
544 oid_to_hex(&complete
->item
->object
.oid
));
545 pop_most_recent_commit(&complete
, COMPLETE
);
549 static void add_refs_to_oidset(struct oidset
*oids
, struct ref
*refs
)
551 for (; refs
; refs
= refs
->next
)
552 oidset_insert(oids
, &refs
->old_oid
);
555 static int is_unmatched_ref(const struct ref
*ref
)
557 struct object_id oid
;
559 return ref
->match_status
== REF_NOT_MATCHED
&&
560 !parse_oid_hex(ref
->name
, &oid
, &p
) &&
562 oideq(&oid
, &ref
->old_oid
);
565 static void filter_refs(struct fetch_pack_args
*args
,
567 struct ref
**sought
, int nr_sought
)
569 struct ref
*newlist
= NULL
;
570 struct ref
**newtail
= &newlist
;
571 struct ref
*unmatched
= NULL
;
572 struct ref
*ref
, *next
;
573 struct oidset tip_oids
= OIDSET_INIT
;
575 int strict
= !(allow_unadvertised_object_request
&
576 (ALLOW_TIP_SHA1
| ALLOW_REACHABLE_SHA1
));
579 for (ref
= *refs
; ref
; ref
= next
) {
583 if (starts_with(ref
->name
, "refs/") &&
584 check_refname_format(ref
->name
, 0)) {
586 * trash or a peeled value; do not even add it to
592 while (i
< nr_sought
) {
593 int cmp
= strcmp(ref
->name
, sought
[i
]->name
);
595 break; /* definitely do not have it */
597 keep
= 1; /* definitely have it */
598 sought
[i
]->match_status
= REF_MATCHED
;
603 if (!keep
&& args
->fetch_all
&&
604 (!args
->deepen
|| !starts_with(ref
->name
, "refs/tags/")))
611 newtail
= &ref
->next
;
613 ref
->next
= unmatched
;
619 for (i
= 0; i
< nr_sought
; i
++) {
621 if (!is_unmatched_ref(ref
))
624 add_refs_to_oidset(&tip_oids
, unmatched
);
625 add_refs_to_oidset(&tip_oids
, newlist
);
630 /* Append unmatched requests to the list */
631 for (i
= 0; i
< nr_sought
; i
++) {
633 if (!is_unmatched_ref(ref
))
636 if (!strict
|| oidset_contains(&tip_oids
, &ref
->old_oid
)) {
637 ref
->match_status
= REF_MATCHED
;
638 *newtail
= copy_ref(ref
);
639 newtail
= &(*newtail
)->next
;
641 ref
->match_status
= REF_UNADVERTISED_NOT_ALLOWED
;
645 oidset_clear(&tip_oids
);
646 free_refs(unmatched
);
651 static void mark_alternate_complete(struct fetch_negotiator
*unused
,
654 mark_complete(&obj
->oid
);
657 struct loose_object_iter
{
658 struct oidset
*loose_object_set
;
663 * Mark recent commits available locally and reachable from a local ref as
666 * The cutoff time for recency is determined by this heuristic: it is the
667 * earliest commit time of the objects in refs that are commits and that we know
668 * the commit time of.
670 static void mark_complete_and_common_ref(struct fetch_negotiator
*negotiator
,
671 struct fetch_pack_args
*args
,
675 int old_save_commit_buffer
= save_commit_buffer
;
676 timestamp_t cutoff
= 0;
678 save_commit_buffer
= 0;
680 trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL
);
681 for (ref
= *refs
; ref
; ref
= ref
->next
) {
684 if (!has_object_file_with_flags(&ref
->old_oid
,
686 OBJECT_INFO_SKIP_FETCH_OBJECT
))
688 o
= parse_object(the_repository
, &ref
->old_oid
);
693 * We already have it -- which may mean that we were
694 * in sync with the other side at some time after
695 * that (it is OK if we guess wrong here).
697 if (o
->type
== OBJ_COMMIT
) {
698 struct commit
*commit
= (struct commit
*)o
;
699 if (!cutoff
|| cutoff
< commit
->date
)
700 cutoff
= commit
->date
;
703 trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL
);
706 * This block marks all local refs as COMPLETE, and then recursively marks all
707 * parents of those refs as COMPLETE.
709 trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL
);
711 for_each_rawref(mark_complete_oid
, NULL
);
712 for_each_cached_alternate(NULL
, mark_alternate_complete
);
713 commit_list_sort_by_date(&complete
);
715 mark_recent_complete_commits(args
, cutoff
);
717 trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL
);
720 * Mark all complete remote refs as common refs.
721 * Don't mark them common yet; the server has to be told so first.
723 trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL
);
724 for (ref
= *refs
; ref
; ref
= ref
->next
) {
725 struct commit
*c
= deref_without_lazy_fetch(&ref
->old_oid
, 0);
727 if (!c
|| !(c
->object
.flags
& COMPLETE
))
730 negotiator
->known_common(negotiator
, c
);
732 trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL
);
734 save_commit_buffer
= old_save_commit_buffer
;
738 * Returns 1 if every object pointed to by the given remote refs is available
739 * locally and reachable from a local ref, and 0 otherwise.
741 static int everything_local(struct fetch_pack_args
*args
,
747 for (retval
= 1, ref
= *refs
; ref
; ref
= ref
->next
) {
748 const struct object_id
*remote
= &ref
->old_oid
;
751 o
= lookup_object(the_repository
, remote
);
752 if (!o
|| !(o
->flags
& COMPLETE
)) {
754 print_verbose(args
, "want %s (%s)", oid_to_hex(remote
),
758 print_verbose(args
, _("already have %s (%s)"), oid_to_hex(remote
),
765 static int sideband_demux(int in
, int out
, void *data
)
770 ret
= recv_sideband("fetch-pack", xd
[0], out
);
775 static void write_promisor_file(const char *keep_name
,
776 struct ref
**sought
, int nr_sought
)
778 struct strbuf promisor_name
= STRBUF_INIT
;
783 strbuf_addstr(&promisor_name
, keep_name
);
784 suffix_stripped
= strbuf_strip_suffix(&promisor_name
, ".keep");
785 if (!suffix_stripped
)
786 BUG("name of pack lockfile should end with .keep (was '%s')",
788 strbuf_addstr(&promisor_name
, ".promisor");
790 output
= xfopen(promisor_name
.buf
, "w");
791 for (i
= 0; i
< nr_sought
; i
++)
792 fprintf(output
, "%s %s\n", oid_to_hex(&sought
[i
]->old_oid
),
796 strbuf_release(&promisor_name
);
800 * Pass 1 as "only_packfile" if the pack received is the only pack in this
801 * fetch request (that is, if there were no packfile URIs provided).
803 static int get_pack(struct fetch_pack_args
*args
,
804 int xd
[2], struct string_list
*pack_lockfiles
,
806 struct ref
**sought
, int nr_sought
)
809 int do_keep
= args
->keep_pack
;
810 const char *cmd_name
;
811 struct pack_header header
;
813 struct child_process cmd
= CHILD_PROCESS_INIT
;
816 memset(&demux
, 0, sizeof(demux
));
818 /* xd[] is talking with upload-pack; subprocess reads from
819 * xd[0], spits out band#2 to stderr, and feeds us band#1
820 * through demux->out.
822 demux
.proc
= sideband_demux
;
825 demux
.isolate_sigpipe
= 1;
826 if (start_async(&demux
))
827 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
832 if (!args
->keep_pack
&& unpack_limit
) {
834 if (read_pack_header(demux
.out
, &header
))
835 die(_("protocol error: bad pack header"));
837 if (ntohl(header
.hdr_entries
) < unpack_limit
)
843 if (alternate_shallow_file
) {
844 strvec_push(&cmd
.args
, "--shallow-file");
845 strvec_push(&cmd
.args
, alternate_shallow_file
);
848 if (do_keep
|| args
->from_promisor
) {
851 cmd_name
= "index-pack";
852 strvec_push(&cmd
.args
, cmd_name
);
853 strvec_push(&cmd
.args
, "--stdin");
854 if (!args
->quiet
&& !args
->no_progress
)
855 strvec_push(&cmd
.args
, "-v");
856 if (args
->use_thin_pack
)
857 strvec_push(&cmd
.args
, "--fix-thin");
858 if (do_keep
&& (args
->lock_pack
|| unpack_limit
)) {
859 char hostname
[HOST_NAME_MAX
+ 1];
860 if (xgethostname(hostname
, sizeof(hostname
)))
861 xsnprintf(hostname
, sizeof(hostname
), "localhost");
862 strvec_pushf(&cmd
.args
,
863 "--keep=fetch-pack %"PRIuMAX
" on %s",
864 (uintmax_t)getpid(), hostname
);
866 if (only_packfile
&& args
->check_self_contained_and_connected
)
867 strvec_push(&cmd
.args
, "--check-self-contained-and-connected");
870 * We cannot perform any connectivity checks because
871 * not all packs have been downloaded; let the caller
872 * have this responsibility.
874 args
->check_self_contained_and_connected
= 0;
876 if (args
->from_promisor
)
878 * write_promisor_file() may be called afterwards but
879 * we still need index-pack to know that this is a
880 * promisor pack. For example, if transfer.fsckobjects
881 * is true, index-pack needs to know that .gitmodules
882 * is a promisor object (so that it won't complain if
885 strvec_push(&cmd
.args
, "--promisor");
888 cmd_name
= "unpack-objects";
889 strvec_push(&cmd
.args
, cmd_name
);
890 if (args
->quiet
|| args
->no_progress
)
891 strvec_push(&cmd
.args
, "-q");
892 args
->check_self_contained_and_connected
= 0;
896 strvec_pushf(&cmd
.args
, "--pack_header=%"PRIu32
",%"PRIu32
,
897 ntohl(header
.hdr_version
),
898 ntohl(header
.hdr_entries
));
899 if (fetch_fsck_objects
>= 0
901 : transfer_fsck_objects
>= 0
902 ? transfer_fsck_objects
904 if (args
->from_promisor
|| !only_packfile
)
906 * We cannot use --strict in index-pack because it
907 * checks both broken objects and links, but we only
908 * want to check for broken objects.
910 strvec_push(&cmd
.args
, "--fsck-objects");
912 strvec_pushf(&cmd
.args
, "--strict%s",
918 if (start_command(&cmd
))
919 die(_("fetch-pack: unable to fork off %s"), cmd_name
);
920 if (do_keep
&& pack_lockfiles
) {
921 string_list_append_nodup(pack_lockfiles
,
922 index_pack_lockfile(cmd
.out
));
927 /* Closed by start_command() */
930 ret
= finish_command(&cmd
);
931 if (!ret
|| (args
->check_self_contained_and_connected
&& ret
== 1))
932 args
->self_contained_and_connected
=
933 args
->check_self_contained_and_connected
&&
936 die(_("%s failed"), cmd_name
);
937 if (use_sideband
&& finish_async(&demux
))
938 die(_("error in sideband demultiplexer"));
941 * Now that index-pack has succeeded, write the promisor file using the
942 * obtained .keep filename if necessary
944 if (do_keep
&& pack_lockfiles
&& pack_lockfiles
->nr
&& args
->from_promisor
)
945 write_promisor_file(pack_lockfiles
->items
[0].string
, sought
, nr_sought
);
950 static int cmp_ref_by_name(const void *a_
, const void *b_
)
952 const struct ref
*a
= *((const struct ref
**)a_
);
953 const struct ref
*b
= *((const struct ref
**)b_
);
954 return strcmp(a
->name
, b
->name
);
957 static struct ref
*do_fetch_pack(struct fetch_pack_args
*args
,
959 const struct ref
*orig_ref
,
960 struct ref
**sought
, int nr_sought
,
961 struct shallow_info
*si
,
962 struct string_list
*pack_lockfiles
)
964 struct repository
*r
= the_repository
;
965 struct ref
*ref
= copy_ref_list(orig_ref
);
966 struct object_id oid
;
967 const char *agent_feature
;
969 struct fetch_negotiator negotiator_alloc
;
970 struct fetch_negotiator
*negotiator
;
972 negotiator
= &negotiator_alloc
;
973 fetch_negotiator_init(r
, negotiator
);
975 sort_ref_list(&ref
, ref_compare_name
);
976 QSORT(sought
, nr_sought
, cmp_ref_by_name
);
978 if ((agent_feature
= server_feature_value("agent", &agent_len
))) {
981 print_verbose(args
, _("Server version is %.*s"),
982 agent_len
, agent_feature
);
985 if (!server_supports("session-id"))
988 if (server_supports("shallow"))
989 print_verbose(args
, _("Server supports %s"), "shallow");
990 else if (args
->depth
> 0 || is_repository_shallow(r
))
991 die(_("Server does not support shallow clients"));
992 if (args
->depth
> 0 || args
->deepen_since
|| args
->deepen_not
)
994 if (server_supports("multi_ack_detailed")) {
995 print_verbose(args
, _("Server supports %s"), "multi_ack_detailed");
997 if (server_supports("no-done")) {
998 print_verbose(args
, _("Server supports %s"), "no-done");
999 if (args
->stateless_rpc
)
1003 else if (server_supports("multi_ack")) {
1004 print_verbose(args
, _("Server supports %s"), "multi_ack");
1007 if (server_supports("side-band-64k")) {
1008 print_verbose(args
, _("Server supports %s"), "side-band-64k");
1011 else if (server_supports("side-band")) {
1012 print_verbose(args
, _("Server supports %s"), "side-band");
1015 if (server_supports("allow-tip-sha1-in-want")) {
1016 print_verbose(args
, _("Server supports %s"), "allow-tip-sha1-in-want");
1017 allow_unadvertised_object_request
|= ALLOW_TIP_SHA1
;
1019 if (server_supports("allow-reachable-sha1-in-want")) {
1020 print_verbose(args
, _("Server supports %s"), "allow-reachable-sha1-in-want");
1021 allow_unadvertised_object_request
|= ALLOW_REACHABLE_SHA1
;
1023 if (server_supports("thin-pack"))
1024 print_verbose(args
, _("Server supports %s"), "thin-pack");
1026 args
->use_thin_pack
= 0;
1027 if (server_supports("no-progress"))
1028 print_verbose(args
, _("Server supports %s"), "no-progress");
1030 args
->no_progress
= 0;
1031 if (server_supports("include-tag"))
1032 print_verbose(args
, _("Server supports %s"), "include-tag");
1034 args
->include_tag
= 0;
1035 if (server_supports("ofs-delta"))
1036 print_verbose(args
, _("Server supports %s"), "ofs-delta");
1038 prefer_ofs_delta
= 0;
1040 if (server_supports("filter")) {
1041 server_supports_filtering
= 1;
1042 print_verbose(args
, _("Server supports %s"), "filter");
1043 } else if (args
->filter_options
.choice
) {
1044 warning("filtering not recognized by server, ignoring");
1047 if (server_supports("deepen-since")) {
1048 print_verbose(args
, _("Server supports %s"), "deepen-since");
1049 deepen_since_ok
= 1;
1050 } else if (args
->deepen_since
)
1051 die(_("Server does not support --shallow-since"));
1052 if (server_supports("deepen-not")) {
1053 print_verbose(args
, _("Server supports %s"), "deepen-not");
1055 } else if (args
->deepen_not
)
1056 die(_("Server does not support --shallow-exclude"));
1057 if (server_supports("deepen-relative"))
1058 print_verbose(args
, _("Server supports %s"), "deepen-relative");
1059 else if (args
->deepen_relative
)
1060 die(_("Server does not support --deepen"));
1061 if (!server_supports_hash(the_hash_algo
->name
, NULL
))
1062 die(_("Server does not support this repository's object format"));
1064 mark_complete_and_common_ref(negotiator
, args
, &ref
);
1065 filter_refs(args
, &ref
, sought
, nr_sought
);
1066 if (everything_local(args
, &ref
)) {
1067 packet_flush(fd
[1]);
1070 if (find_common(negotiator
, args
, fd
, &oid
, ref
) < 0)
1071 if (!args
->keep_pack
)
1072 /* When cloning, it is not unusual to have
1075 warning(_("no common commits"));
1077 if (args
->stateless_rpc
)
1078 packet_flush(fd
[1]);
1080 setup_alternate_shallow(&shallow_lock
, &alternate_shallow_file
,
1082 else if (si
->nr_ours
|| si
->nr_theirs
)
1083 alternate_shallow_file
= setup_temporary_shallow(si
->shallow
);
1085 alternate_shallow_file
= NULL
;
1086 if (get_pack(args
, fd
, pack_lockfiles
, 1, sought
, nr_sought
))
1087 die(_("git fetch-pack: fetch failed."));
1091 negotiator
->release(negotiator
);
1095 static void add_shallow_requests(struct strbuf
*req_buf
,
1096 const struct fetch_pack_args
*args
)
1098 if (is_repository_shallow(the_repository
))
1099 write_shallow_commits(req_buf
, 1, NULL
);
1100 if (args
->depth
> 0)
1101 packet_buf_write(req_buf
, "deepen %d", args
->depth
);
1102 if (args
->deepen_since
) {
1103 timestamp_t max_age
= approxidate(args
->deepen_since
);
1104 packet_buf_write(req_buf
, "deepen-since %"PRItime
, max_age
);
1106 if (args
->deepen_not
) {
1108 for (i
= 0; i
< args
->deepen_not
->nr
; i
++) {
1109 struct string_list_item
*s
= args
->deepen_not
->items
+ i
;
1110 packet_buf_write(req_buf
, "deepen-not %s", s
->string
);
1113 if (args
->deepen_relative
)
1114 packet_buf_write(req_buf
, "deepen-relative\n");
1117 static void add_wants(const struct ref
*wants
, struct strbuf
*req_buf
)
1119 int use_ref_in_want
= server_supports_feature("fetch", "ref-in-want", 0);
1121 for ( ; wants
; wants
= wants
->next
) {
1122 const struct object_id
*remote
= &wants
->old_oid
;
1126 * If that object is complete (i.e. it is an ancestor of a
1127 * local ref), we tell them we have it but do not have to
1128 * tell them about its ancestors, which they already know
1131 * We use lookup_object here because we are only
1132 * interested in the case we *know* the object is
1133 * reachable and we have already scanned it.
1135 if (((o
= lookup_object(the_repository
, remote
)) != NULL
) &&
1136 (o
->flags
& COMPLETE
)) {
1140 if (!use_ref_in_want
|| wants
->exact_oid
)
1141 packet_buf_write(req_buf
, "want %s\n", oid_to_hex(remote
));
1143 packet_buf_write(req_buf
, "want-ref %s\n", wants
->name
);
1147 static void add_common(struct strbuf
*req_buf
, struct oidset
*common
)
1149 struct oidset_iter iter
;
1150 const struct object_id
*oid
;
1151 oidset_iter_init(common
, &iter
);
1153 while ((oid
= oidset_iter_next(&iter
))) {
1154 packet_buf_write(req_buf
, "have %s\n", oid_to_hex(oid
));
1158 static int add_haves(struct fetch_negotiator
*negotiator
,
1160 struct strbuf
*req_buf
,
1161 int *haves_to_send
, int *in_vain
)
1164 int haves_added
= 0;
1165 const struct object_id
*oid
;
1167 while ((oid
= negotiator
->next(negotiator
))) {
1168 packet_buf_write(req_buf
, "have %s\n", oid_to_hex(oid
));
1169 if (++haves_added
>= *haves_to_send
)
1173 *in_vain
+= haves_added
;
1174 if (!haves_added
|| (seen_ack
&& *in_vain
>= MAX_IN_VAIN
)) {
1176 packet_buf_write(req_buf
, "done\n");
1180 /* Increase haves to send on next round */
1181 *haves_to_send
= next_flush(1, *haves_to_send
);
1186 static int send_fetch_request(struct fetch_negotiator
*negotiator
, int fd_out
,
1187 struct fetch_pack_args
*args
,
1188 const struct ref
*wants
, struct oidset
*common
,
1189 int *haves_to_send
, int *in_vain
,
1190 int sideband_all
, int seen_ack
)
1193 const char *hash_name
;
1194 struct strbuf req_buf
= STRBUF_INIT
;
1196 if (server_supports_v2("fetch", 1))
1197 packet_buf_write(&req_buf
, "command=fetch");
1198 if (server_supports_v2("agent", 0))
1199 packet_buf_write(&req_buf
, "agent=%s", git_user_agent_sanitized());
1200 if (advertise_sid
&& server_supports_v2("session-id", 0))
1201 packet_buf_write(&req_buf
, "session-id=%s", trace2_session_id());
1202 if (args
->server_options
&& args
->server_options
->nr
&&
1203 server_supports_v2("server-option", 1)) {
1205 for (i
= 0; i
< args
->server_options
->nr
; i
++)
1206 packet_buf_write(&req_buf
, "server-option=%s",
1207 args
->server_options
->items
[i
].string
);
1210 if (server_feature_v2("object-format", &hash_name
)) {
1211 int hash_algo
= hash_algo_by_name(hash_name
);
1212 if (hash_algo_by_ptr(the_hash_algo
) != hash_algo
)
1213 die(_("mismatched algorithms: client %s; server %s"),
1214 the_hash_algo
->name
, hash_name
);
1215 packet_write_fmt(fd_out
, "object-format=%s", the_hash_algo
->name
);
1216 } else if (hash_algo_by_ptr(the_hash_algo
) != GIT_HASH_SHA1
) {
1217 die(_("the server does not support algorithm '%s'"),
1218 the_hash_algo
->name
);
1221 packet_buf_delim(&req_buf
);
1222 if (args
->use_thin_pack
)
1223 packet_buf_write(&req_buf
, "thin-pack");
1224 if (args
->no_progress
)
1225 packet_buf_write(&req_buf
, "no-progress");
1226 if (args
->include_tag
)
1227 packet_buf_write(&req_buf
, "include-tag");
1228 if (prefer_ofs_delta
)
1229 packet_buf_write(&req_buf
, "ofs-delta");
1231 packet_buf_write(&req_buf
, "sideband-all");
1233 /* Add shallow-info and deepen request */
1234 if (server_supports_feature("fetch", "shallow", 0))
1235 add_shallow_requests(&req_buf
, args
);
1236 else if (is_repository_shallow(the_repository
) || args
->deepen
)
1237 die(_("Server does not support shallow requests"));
1240 if (server_supports_feature("fetch", "filter", 0) &&
1241 args
->filter_options
.choice
) {
1243 expand_list_objects_filter_spec(&args
->filter_options
);
1244 print_verbose(args
, _("Server supports filter"));
1245 packet_buf_write(&req_buf
, "filter %s", spec
);
1246 } else if (args
->filter_options
.choice
) {
1247 warning("filtering not recognized by server, ignoring");
1250 if (server_supports_feature("fetch", "packfile-uris", 0)) {
1252 struct strbuf to_send
= STRBUF_INIT
;
1254 for (i
= 0; i
< uri_protocols
.nr
; i
++) {
1255 const char *s
= uri_protocols
.items
[i
].string
;
1257 if (!strcmp(s
, "https") || !strcmp(s
, "http")) {
1259 strbuf_addch(&to_send
, ',');
1260 strbuf_addstr(&to_send
, s
);
1264 packet_buf_write(&req_buf
, "packfile-uris %s",
1266 strbuf_release(&to_send
);
1271 add_wants(wants
, &req_buf
);
1273 /* Add all of the common commits we've found in previous rounds */
1274 add_common(&req_buf
, common
);
1276 /* Add initial haves */
1277 ret
= add_haves(negotiator
, seen_ack
, &req_buf
,
1278 haves_to_send
, in_vain
);
1281 packet_buf_flush(&req_buf
);
1282 if (write_in_full(fd_out
, req_buf
.buf
, req_buf
.len
) < 0)
1283 die_errno(_("unable to write request to remote"));
1285 strbuf_release(&req_buf
);
1290 * Processes a section header in a server's response and checks if it matches
1291 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1292 * not consumed); if 0, the line will be consumed and the function will die if
1293 * the section header doesn't match what was expected.
1295 static int process_section_header(struct packet_reader
*reader
,
1296 const char *section
, int peek
)
1300 if (packet_reader_peek(reader
) != PACKET_READ_NORMAL
)
1301 die(_("error reading section header '%s'"), section
);
1303 ret
= !strcmp(reader
->line
, section
);
1307 die(_("expected '%s', received '%s'"),
1308 section
, reader
->line
);
1309 packet_reader_read(reader
);
1317 * No commit was found to be possessed by both the client and the
1318 * server, and "ready" was not received.
1323 * At least one commit was found to be possessed by both the client and
1324 * the server, and "ready" was not received.
1329 * "ready" was received, indicating that the server is ready to send
1330 * the packfile without any further negotiation.
1335 static enum common_found
process_acks(struct fetch_negotiator
*negotiator
,
1336 struct packet_reader
*reader
,
1337 struct oidset
*common
)
1340 int received_ready
= 0;
1341 int received_ack
= 0;
1343 process_section_header(reader
, "acknowledgments", 0);
1344 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1347 if (!strcmp(reader
->line
, "NAK"))
1350 if (skip_prefix(reader
->line
, "ACK ", &arg
)) {
1351 struct object_id oid
;
1353 if (!get_oid_hex(arg
, &oid
)) {
1354 struct commit
*commit
;
1355 oidset_insert(common
, &oid
);
1356 commit
= lookup_commit(the_repository
, &oid
);
1358 negotiator
->ack(negotiator
, commit
);
1363 if (!strcmp(reader
->line
, "ready")) {
1368 die(_("unexpected acknowledgment line: '%s'"), reader
->line
);
1371 if (reader
->status
!= PACKET_READ_FLUSH
&&
1372 reader
->status
!= PACKET_READ_DELIM
)
1373 die(_("error processing acks: %d"), reader
->status
);
1376 * If an "acknowledgments" section is sent, a packfile is sent if and
1377 * only if "ready" was sent in this section. The other sections
1378 * ("shallow-info" and "wanted-refs") are sent only if a packfile is
1379 * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH
1382 if (received_ready
&& reader
->status
!= PACKET_READ_DELIM
)
1383 die(_("expected packfile to be sent after 'ready'"));
1384 if (!received_ready
&& reader
->status
!= PACKET_READ_FLUSH
)
1385 die(_("expected no other sections to be sent after no 'ready'"));
1387 return received_ready
? READY
:
1388 (received_ack
? COMMON_FOUND
: NO_COMMON_FOUND
);
1391 static void receive_shallow_info(struct fetch_pack_args
*args
,
1392 struct packet_reader
*reader
,
1393 struct oid_array
*shallows
,
1394 struct shallow_info
*si
)
1396 int unshallow_received
= 0;
1398 process_section_header(reader
, "shallow-info", 0);
1399 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1401 struct object_id oid
;
1403 if (skip_prefix(reader
->line
, "shallow ", &arg
)) {
1404 if (get_oid_hex(arg
, &oid
))
1405 die(_("invalid shallow line: %s"), reader
->line
);
1406 oid_array_append(shallows
, &oid
);
1409 if (skip_prefix(reader
->line
, "unshallow ", &arg
)) {
1410 if (get_oid_hex(arg
, &oid
))
1411 die(_("invalid unshallow line: %s"), reader
->line
);
1412 if (!lookup_object(the_repository
, &oid
))
1413 die(_("object not found: %s"), reader
->line
);
1414 /* make sure that it is parsed as shallow */
1415 if (!parse_object(the_repository
, &oid
))
1416 die(_("error in object: %s"), reader
->line
);
1417 if (unregister_shallow(&oid
))
1418 die(_("no shallow found: %s"), reader
->line
);
1419 unshallow_received
= 1;
1422 die(_("expected shallow/unshallow, got %s"), reader
->line
);
1425 if (reader
->status
!= PACKET_READ_FLUSH
&&
1426 reader
->status
!= PACKET_READ_DELIM
)
1427 die(_("error processing shallow info: %d"), reader
->status
);
1429 if (args
->deepen
|| unshallow_received
) {
1431 * Treat these as shallow lines caused by our depth settings.
1432 * In v0, these lines cannot cause refs to be rejected; do the
1437 for (i
= 0; i
< shallows
->nr
; i
++)
1438 register_shallow(the_repository
, &shallows
->oid
[i
]);
1439 setup_alternate_shallow(&shallow_lock
, &alternate_shallow_file
,
1442 } else if (shallows
->nr
) {
1444 * Treat these as shallow lines caused by the remote being
1445 * shallow. In v0, remote refs that reach these objects are
1446 * rejected (unless --update-shallow is set); do the same.
1448 prepare_shallow_info(si
, shallows
);
1449 if (si
->nr_ours
|| si
->nr_theirs
)
1450 alternate_shallow_file
=
1451 setup_temporary_shallow(si
->shallow
);
1453 alternate_shallow_file
= NULL
;
1455 alternate_shallow_file
= NULL
;
1459 static int cmp_name_ref(const void *name
, const void *ref
)
1461 return strcmp(name
, (*(struct ref
**)ref
)->name
);
1464 static void receive_wanted_refs(struct packet_reader
*reader
,
1465 struct ref
**sought
, int nr_sought
)
1467 process_section_header(reader
, "wanted-refs", 0);
1468 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1469 struct object_id oid
;
1473 if (parse_oid_hex(reader
->line
, &oid
, &end
) || *end
++ != ' ')
1474 die(_("expected wanted-ref, got '%s'"), reader
->line
);
1476 found
= bsearch(end
, sought
, nr_sought
, sizeof(*sought
),
1479 die(_("unexpected wanted-ref: '%s'"), reader
->line
);
1480 oidcpy(&(*found
)->old_oid
, &oid
);
1483 if (reader
->status
!= PACKET_READ_DELIM
)
1484 die(_("error processing wanted refs: %d"), reader
->status
);
1487 static void receive_packfile_uris(struct packet_reader
*reader
,
1488 struct string_list
*uris
)
1490 process_section_header(reader
, "packfile-uris", 0);
1491 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1492 if (reader
->pktlen
< the_hash_algo
->hexsz
||
1493 reader
->line
[the_hash_algo
->hexsz
] != ' ')
1494 die("expected '<hash> <uri>', got: %s\n", reader
->line
);
1496 string_list_append(uris
, reader
->line
);
1498 if (reader
->status
!= PACKET_READ_DELIM
)
1499 die("expected DELIM");
1503 FETCH_CHECK_LOCAL
= 0,
1510 static void do_check_stateless_delimiter(const struct fetch_pack_args
*args
,
1511 struct packet_reader
*reader
)
1513 check_stateless_delimiter(args
->stateless_rpc
, reader
,
1514 _("git fetch-pack: expected response end packet"));
1517 static struct ref
*do_fetch_pack_v2(struct fetch_pack_args
*args
,
1519 const struct ref
*orig_ref
,
1520 struct ref
**sought
, int nr_sought
,
1521 struct oid_array
*shallows
,
1522 struct shallow_info
*si
,
1523 struct string_list
*pack_lockfiles
)
1525 struct repository
*r
= the_repository
;
1526 struct ref
*ref
= copy_ref_list(orig_ref
);
1527 enum fetch_state state
= FETCH_CHECK_LOCAL
;
1528 struct oidset common
= OIDSET_INIT
;
1529 struct packet_reader reader
;
1530 int in_vain
= 0, negotiation_started
= 0;
1531 int haves_to_send
= INITIAL_FLUSH
;
1532 struct fetch_negotiator negotiator_alloc
;
1533 struct fetch_negotiator
*negotiator
;
1535 struct string_list packfile_uris
= STRING_LIST_INIT_DUP
;
1538 negotiator
= &negotiator_alloc
;
1539 fetch_negotiator_init(r
, negotiator
);
1541 packet_reader_init(&reader
, fd
[0], NULL
, 0,
1542 PACKET_READ_CHOMP_NEWLINE
|
1543 PACKET_READ_DIE_ON_ERR_PACKET
);
1544 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) &&
1545 server_supports_feature("fetch", "sideband-all", 0)) {
1546 reader
.use_sideband
= 1;
1547 reader
.me
= "fetch-pack";
1550 while (state
!= FETCH_DONE
) {
1552 case FETCH_CHECK_LOCAL
:
1553 sort_ref_list(&ref
, ref_compare_name
);
1554 QSORT(sought
, nr_sought
, cmp_ref_by_name
);
1556 /* v2 supports these by default */
1557 allow_unadvertised_object_request
|= ALLOW_REACHABLE_SHA1
;
1559 if (args
->depth
> 0 || args
->deepen_since
|| args
->deepen_not
)
1562 /* Filter 'ref' by 'sought' and those that aren't local */
1563 mark_complete_and_common_ref(negotiator
, args
, &ref
);
1564 filter_refs(args
, &ref
, sought
, nr_sought
);
1565 if (everything_local(args
, &ref
))
1568 state
= FETCH_SEND_REQUEST
;
1570 mark_tips(negotiator
, args
->negotiation_tips
);
1571 for_each_cached_alternate(negotiator
,
1572 insert_one_alternate_object
);
1574 case FETCH_SEND_REQUEST
:
1575 if (!negotiation_started
) {
1576 negotiation_started
= 1;
1577 trace2_region_enter("fetch-pack",
1581 if (send_fetch_request(negotiator
, fd
[1], args
, ref
,
1583 &haves_to_send
, &in_vain
,
1584 reader
.use_sideband
,
1586 state
= FETCH_GET_PACK
;
1588 state
= FETCH_PROCESS_ACKS
;
1590 case FETCH_PROCESS_ACKS
:
1591 /* Process ACKs/NAKs */
1592 switch (process_acks(negotiator
, &reader
, &common
)) {
1595 * Don't check for response delimiter; get_pack() will
1596 * read the rest of this response.
1598 state
= FETCH_GET_PACK
;
1604 case NO_COMMON_FOUND
:
1605 do_check_stateless_delimiter(args
, &reader
);
1606 state
= FETCH_SEND_REQUEST
;
1610 case FETCH_GET_PACK
:
1611 trace2_region_leave("fetch-pack",
1614 /* Check for shallow-info section */
1615 if (process_section_header(&reader
, "shallow-info", 1))
1616 receive_shallow_info(args
, &reader
, shallows
, si
);
1618 if (process_section_header(&reader
, "wanted-refs", 1))
1619 receive_wanted_refs(&reader
, sought
, nr_sought
);
1621 /* get the pack(s) */
1622 if (process_section_header(&reader
, "packfile-uris", 1))
1623 receive_packfile_uris(&reader
, &packfile_uris
);
1624 process_section_header(&reader
, "packfile", 0);
1625 if (get_pack(args
, fd
, pack_lockfiles
,
1626 !packfile_uris
.nr
, sought
, nr_sought
))
1627 die(_("git fetch-pack: fetch failed."));
1628 do_check_stateless_delimiter(args
, &reader
);
1637 for (i
= 0; i
< packfile_uris
.nr
; i
++) {
1638 struct child_process cmd
= CHILD_PROCESS_INIT
;
1639 char packname
[GIT_MAX_HEXSZ
+ 1];
1640 const char *uri
= packfile_uris
.items
[i
].string
+
1641 the_hash_algo
->hexsz
+ 1;
1643 strvec_push(&cmd
.args
, "http-fetch");
1644 strvec_pushf(&cmd
.args
, "--packfile=%.*s",
1645 (int) the_hash_algo
->hexsz
,
1646 packfile_uris
.items
[i
].string
);
1647 strvec_push(&cmd
.args
, uri
);
1651 if (start_command(&cmd
))
1652 die("fetch-pack: unable to spawn http-fetch");
1654 if (read_in_full(cmd
.out
, packname
, 5) < 0 ||
1655 memcmp(packname
, "keep\t", 5))
1656 die("fetch-pack: expected keep then TAB at start of http-fetch output");
1658 if (read_in_full(cmd
.out
, packname
,
1659 the_hash_algo
->hexsz
+ 1) < 0 ||
1660 packname
[the_hash_algo
->hexsz
] != '\n')
1661 die("fetch-pack: expected hash then LF at end of http-fetch output");
1663 packname
[the_hash_algo
->hexsz
] = '\0';
1667 if (finish_command(&cmd
))
1668 die("fetch-pack: unable to finish http-fetch");
1670 if (memcmp(packfile_uris
.items
[i
].string
, packname
,
1671 the_hash_algo
->hexsz
))
1672 die("fetch-pack: pack downloaded from %s does not match expected hash %.*s",
1673 uri
, (int) the_hash_algo
->hexsz
,
1674 packfile_uris
.items
[i
].string
);
1676 string_list_append_nodup(pack_lockfiles
,
1677 xstrfmt("%s/pack/pack-%s.keep",
1678 get_object_directory(),
1681 string_list_clear(&packfile_uris
, 0);
1684 negotiator
->release(negotiator
);
1686 oidset_clear(&common
);
1690 static int fetch_pack_config_cb(const char *var
, const char *value
, void *cb
)
1692 if (strcmp(var
, "fetch.fsck.skiplist") == 0) {
1695 if (git_config_pathname(&path
, var
, value
))
1697 strbuf_addf(&fsck_msg_types
, "%cskiplist=%s",
1698 fsck_msg_types
.len
? ',' : '=', path
);
1703 if (skip_prefix(var
, "fetch.fsck.", &var
)) {
1704 if (is_valid_msg_type(var
, value
))
1705 strbuf_addf(&fsck_msg_types
, "%c%s=%s",
1706 fsck_msg_types
.len
? ',' : '=', var
, value
);
1708 warning("Skipping unknown msg id '%s'", var
);
1712 return git_default_config(var
, value
, cb
);
1715 static void fetch_pack_config(void)
1717 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit
);
1718 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit
);
1719 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta
);
1720 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects
);
1721 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects
);
1722 git_config_get_bool("transfer.advertisesid", &advertise_sid
);
1723 if (!uri_protocols
.nr
) {
1726 if (!git_config_get_string("fetch.uriprotocols", &str
) && str
) {
1727 string_list_split(&uri_protocols
, str
, ',', -1);
1732 git_config(fetch_pack_config_cb
, NULL
);
1735 static void fetch_pack_setup(void)
1737 static int did_setup
;
1740 fetch_pack_config();
1741 if (0 <= transfer_unpack_limit
)
1742 unpack_limit
= transfer_unpack_limit
;
1743 else if (0 <= fetch_unpack_limit
)
1744 unpack_limit
= fetch_unpack_limit
;
1748 static int remove_duplicates_in_refs(struct ref
**ref
, int nr
)
1750 struct string_list names
= STRING_LIST_INIT_NODUP
;
1753 for (src
= dst
= 0; src
< nr
; src
++) {
1754 struct string_list_item
*item
;
1755 item
= string_list_insert(&names
, ref
[src
]->name
);
1757 continue; /* already have it */
1758 item
->util
= ref
[src
];
1760 ref
[dst
] = ref
[src
];
1763 for (src
= dst
; src
< nr
; src
++)
1765 string_list_clear(&names
, 0);
1769 static void update_shallow(struct fetch_pack_args
*args
,
1770 struct ref
**sought
, int nr_sought
,
1771 struct shallow_info
*si
)
1773 struct oid_array ref
= OID_ARRAY_INIT
;
1777 if (args
->deepen
&& alternate_shallow_file
) {
1778 if (*alternate_shallow_file
== '\0') { /* --unshallow */
1779 unlink_or_warn(git_path_shallow(the_repository
));
1780 rollback_shallow_file(the_repository
, &shallow_lock
);
1782 commit_shallow_file(the_repository
, &shallow_lock
);
1783 alternate_shallow_file
= NULL
;
1787 if (!si
->shallow
|| !si
->shallow
->nr
)
1790 if (args
->cloning
) {
1792 * remote is shallow, but this is a clone, there are
1793 * no objects in repo to worry about. Accept any
1794 * shallow points that exist in the pack (iow in repo
1795 * after get_pack() and reprepare_packed_git())
1797 struct oid_array extra
= OID_ARRAY_INIT
;
1798 struct object_id
*oid
= si
->shallow
->oid
;
1799 for (i
= 0; i
< si
->shallow
->nr
; i
++)
1800 if (has_object_file(&oid
[i
]))
1801 oid_array_append(&extra
, &oid
[i
]);
1803 setup_alternate_shallow(&shallow_lock
,
1804 &alternate_shallow_file
,
1806 commit_shallow_file(the_repository
, &shallow_lock
);
1807 alternate_shallow_file
= NULL
;
1809 oid_array_clear(&extra
);
1813 if (!si
->nr_ours
&& !si
->nr_theirs
)
1816 remove_nonexistent_theirs_shallow(si
);
1817 if (!si
->nr_ours
&& !si
->nr_theirs
)
1819 for (i
= 0; i
< nr_sought
; i
++)
1820 oid_array_append(&ref
, &sought
[i
]->old_oid
);
1823 if (args
->update_shallow
) {
1825 * remote is also shallow, .git/shallow may be updated
1826 * so all refs can be accepted. Make sure we only add
1827 * shallow roots that are actually reachable from new
1830 struct oid_array extra
= OID_ARRAY_INIT
;
1831 struct object_id
*oid
= si
->shallow
->oid
;
1832 assign_shallow_commits_to_refs(si
, NULL
, NULL
);
1833 if (!si
->nr_ours
&& !si
->nr_theirs
) {
1834 oid_array_clear(&ref
);
1837 for (i
= 0; i
< si
->nr_ours
; i
++)
1838 oid_array_append(&extra
, &oid
[si
->ours
[i
]]);
1839 for (i
= 0; i
< si
->nr_theirs
; i
++)
1840 oid_array_append(&extra
, &oid
[si
->theirs
[i
]]);
1841 setup_alternate_shallow(&shallow_lock
,
1842 &alternate_shallow_file
,
1844 commit_shallow_file(the_repository
, &shallow_lock
);
1845 oid_array_clear(&extra
);
1846 oid_array_clear(&ref
);
1847 alternate_shallow_file
= NULL
;
1852 * remote is also shallow, check what ref is safe to update
1853 * without updating .git/shallow
1855 status
= xcalloc(nr_sought
, sizeof(*status
));
1856 assign_shallow_commits_to_refs(si
, NULL
, status
);
1857 if (si
->nr_ours
|| si
->nr_theirs
) {
1858 for (i
= 0; i
< nr_sought
; i
++)
1860 sought
[i
]->status
= REF_STATUS_REJECT_SHALLOW
;
1863 oid_array_clear(&ref
);
1866 static int iterate_ref_map(void *cb_data
, struct object_id
*oid
)
1868 struct ref
**rm
= cb_data
;
1869 struct ref
*ref
= *rm
;
1872 return -1; /* end of the list */
1874 oidcpy(oid
, &ref
->old_oid
);
1878 struct ref
*fetch_pack(struct fetch_pack_args
*args
,
1880 const struct ref
*ref
,
1881 struct ref
**sought
, int nr_sought
,
1882 struct oid_array
*shallow
,
1883 struct string_list
*pack_lockfiles
,
1884 enum protocol_version version
)
1886 struct ref
*ref_cpy
;
1887 struct shallow_info si
;
1888 struct oid_array shallows_scratch
= OID_ARRAY_INIT
;
1892 nr_sought
= remove_duplicates_in_refs(sought
, nr_sought
);
1894 if (version
!= protocol_v2
&& !ref
) {
1895 packet_flush(fd
[1]);
1896 die(_("no matching remote head"));
1898 if (version
== protocol_v2
) {
1900 BUG("Protocol V2 does not provide shallows at this point in the fetch");
1901 memset(&si
, 0, sizeof(si
));
1902 ref_cpy
= do_fetch_pack_v2(args
, fd
, ref
, sought
, nr_sought
,
1903 &shallows_scratch
, &si
,
1906 prepare_shallow_info(&si
, shallow
);
1907 ref_cpy
= do_fetch_pack(args
, fd
, ref
, sought
, nr_sought
,
1908 &si
, pack_lockfiles
);
1910 reprepare_packed_git(the_repository
);
1912 if (!args
->cloning
&& args
->deepen
) {
1913 struct check_connected_options opt
= CHECK_CONNECTED_INIT
;
1914 struct ref
*iterator
= ref_cpy
;
1915 opt
.shallow_file
= alternate_shallow_file
;
1917 opt
.is_deepening_fetch
= 1;
1918 if (check_connected(iterate_ref_map
, &iterator
, &opt
)) {
1919 error(_("remote did not send all necessary objects"));
1922 rollback_shallow_file(the_repository
, &shallow_lock
);
1925 args
->connectivity_checked
= 1;
1928 update_shallow(args
, sought
, nr_sought
, &si
);
1930 clear_shallow_info(&si
);
1931 oid_array_clear(&shallows_scratch
);
1935 int report_unmatched_refs(struct ref
**sought
, int nr_sought
)
1939 for (i
= 0; i
< nr_sought
; i
++) {
1942 switch (sought
[i
]->match_status
) {
1945 case REF_NOT_MATCHED
:
1946 error(_("no such remote ref %s"), sought
[i
]->name
);
1948 case REF_UNADVERTISED_NOT_ALLOWED
:
1949 error(_("Server does not allow request for unadvertised object %s"),