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"
30 static int transfer_unpack_limit
= -1;
31 static int fetch_unpack_limit
= -1;
32 static int unpack_limit
= 100;
33 static int prefer_ofs_delta
= 1;
35 static int deepen_since_ok
;
36 static int deepen_not_ok
;
37 static int fetch_fsck_objects
= -1;
38 static int transfer_fsck_objects
= -1;
39 static int agent_supported
;
40 static int server_supports_filtering
;
41 static int advertise_sid
;
42 static struct shallow_lock shallow_lock
;
43 static const char *alternate_shallow_file
;
44 static struct fsck_options fsck_options
= FSCK_OPTIONS_MISSING_GITMODULES
;
45 static struct strbuf fsck_msg_types
= STRBUF_INIT
;
46 static struct string_list uri_protocols
= STRING_LIST_INIT_DUP
;
48 /* Remember to update object flag allocation in object.h */
49 #define COMPLETE (1U << 0)
50 #define ALTERNATE (1U << 1)
51 #define COMMON (1U << 6)
52 #define REACH_SCRATCH (1U << 7)
55 * After sending this many "have"s if we do not get any new ACK , we
56 * give up traversing our history.
58 #define MAX_IN_VAIN 256
60 static int multi_ack
, use_sideband
;
61 /* Allow specifying sha1 if it is a ref tip. */
62 #define ALLOW_TIP_SHA1 01
63 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
64 #define ALLOW_REACHABLE_SHA1 02
65 static unsigned int allow_unadvertised_object_request
;
67 __attribute__((format (printf
, 2, 3)))
68 static inline void print_verbose(const struct fetch_pack_args
*args
,
76 va_start(params
, fmt
);
77 vfprintf(stderr
, fmt
, params
);
82 struct alternate_object_cache
{
83 struct object
**items
;
87 static void cache_one_alternate(const struct object_id
*oid
,
90 struct alternate_object_cache
*cache
= vcache
;
91 struct object
*obj
= parse_object(the_repository
, oid
);
93 if (!obj
|| (obj
->flags
& ALTERNATE
))
96 obj
->flags
|= ALTERNATE
;
97 ALLOC_GROW(cache
->items
, cache
->nr
+ 1, cache
->alloc
);
98 cache
->items
[cache
->nr
++] = obj
;
101 static void for_each_cached_alternate(struct fetch_negotiator
*negotiator
,
102 void (*cb
)(struct fetch_negotiator
*,
105 static int initialized
;
106 static struct alternate_object_cache cache
;
110 for_each_alternate_ref(cache_one_alternate
, &cache
);
114 for (i
= 0; i
< cache
.nr
; i
++)
115 cb(negotiator
, cache
.items
[i
]);
118 static struct commit
*deref_without_lazy_fetch(const struct object_id
*oid
,
119 int mark_tags_complete
)
121 enum object_type type
;
122 struct object_info info
= { .typep
= &type
};
123 struct commit
*commit
;
125 commit
= lookup_commit_in_graph(the_repository
, oid
);
130 if (oid_object_info_extended(the_repository
, oid
, &info
,
131 OBJECT_INFO_SKIP_FETCH_OBJECT
| OBJECT_INFO_QUICK
))
133 if (type
== OBJ_TAG
) {
134 struct tag
*tag
= (struct tag
*)
135 parse_object(the_repository
, oid
);
139 if (mark_tags_complete
)
140 tag
->object
.flags
|= COMPLETE
;
141 oid
= &tag
->tagged
->oid
;
147 if (type
== OBJ_COMMIT
) {
148 struct commit
*commit
= lookup_commit(the_repository
, oid
);
149 if (!commit
|| repo_parse_commit(the_repository
, commit
))
157 static int rev_list_insert_ref(struct fetch_negotiator
*negotiator
,
158 const struct object_id
*oid
)
160 struct commit
*c
= deref_without_lazy_fetch(oid
, 0);
163 negotiator
->add_tip(negotiator
, c
);
167 static int rev_list_insert_ref_oid(const char *refname
, const struct object_id
*oid
,
168 int flag
, void *cb_data
)
170 return rev_list_insert_ref(cb_data
, oid
);
181 static void consume_shallow_list(struct fetch_pack_args
*args
,
182 struct packet_reader
*reader
)
184 if (args
->stateless_rpc
&& args
->deepen
) {
185 /* If we sent a depth we will get back "duplicate"
186 * shallow and unshallow commands every time there
187 * is a block of have lines exchanged.
189 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
190 if (starts_with(reader
->line
, "shallow "))
192 if (starts_with(reader
->line
, "unshallow "))
194 die(_("git fetch-pack: expected shallow list"));
196 if (reader
->status
!= PACKET_READ_FLUSH
)
197 die(_("git fetch-pack: expected a flush packet after shallow list"));
201 static enum ack_type
get_ack(struct packet_reader
*reader
,
202 struct object_id
*result_oid
)
207 if (packet_reader_read(reader
) != PACKET_READ_NORMAL
)
208 die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
209 len
= reader
->pktlen
;
211 if (!strcmp(reader
->line
, "NAK"))
213 if (skip_prefix(reader
->line
, "ACK ", &arg
)) {
215 if (!parse_oid_hex(arg
, result_oid
, &p
)) {
216 len
-= p
- reader
->line
;
219 if (strstr(p
, "continue"))
221 if (strstr(p
, "common"))
223 if (strstr(p
, "ready"))
228 die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader
->line
);
231 static void send_request(struct fetch_pack_args
*args
,
232 int fd
, struct strbuf
*buf
)
234 if (args
->stateless_rpc
) {
235 send_sideband(fd
, -1, buf
->buf
, buf
->len
, LARGE_PACKET_MAX
);
238 if (write_in_full(fd
, buf
->buf
, buf
->len
) < 0)
239 die_errno(_("unable to write to remote"));
243 static void insert_one_alternate_object(struct fetch_negotiator
*negotiator
,
246 rev_list_insert_ref(negotiator
, &obj
->oid
);
249 #define INITIAL_FLUSH 16
250 #define PIPESAFE_FLUSH 32
251 #define LARGE_FLUSH 16384
253 static int next_flush(int stateless_rpc
, int count
)
256 if (count
< LARGE_FLUSH
)
259 count
= count
* 11 / 10;
261 if (count
< PIPESAFE_FLUSH
)
264 count
+= PIPESAFE_FLUSH
;
269 static void mark_tips(struct fetch_negotiator
*negotiator
,
270 const struct oid_array
*negotiation_tips
)
274 if (!negotiation_tips
) {
275 for_each_rawref(rev_list_insert_ref_oid
, negotiator
);
279 for (i
= 0; i
< negotiation_tips
->nr
; i
++)
280 rev_list_insert_ref(negotiator
, &negotiation_tips
->oid
[i
]);
284 static int find_common(struct fetch_negotiator
*negotiator
,
285 struct fetch_pack_args
*args
,
286 int fd
[2], struct object_id
*result_oid
,
290 int count
= 0, flushes
= 0, flush_at
= INITIAL_FLUSH
, retval
;
291 const struct object_id
*oid
;
292 unsigned in_vain
= 0;
293 int got_continue
= 0;
295 struct strbuf req_buf
= STRBUF_INIT
;
296 size_t state_len
= 0;
297 struct packet_reader reader
;
299 if (args
->stateless_rpc
&& multi_ack
== 1)
300 die(_("the option '%s' requires '%s'"), "--stateless-rpc", "multi_ack_detailed");
302 packet_reader_init(&reader
, fd
[0], NULL
, 0,
303 PACKET_READ_CHOMP_NEWLINE
|
304 PACKET_READ_DIE_ON_ERR_PACKET
);
306 mark_tips(negotiator
, args
->negotiation_tips
);
307 for_each_cached_alternate(negotiator
, insert_one_alternate_object
);
310 for ( ; refs
; refs
= refs
->next
) {
311 struct object_id
*remote
= &refs
->old_oid
;
312 const char *remote_hex
;
316 * If that object is complete (i.e. it is an ancestor of a
317 * local ref), we tell them we have it but do not have to
318 * tell them about its ancestors, which they already know
321 * We use lookup_object here because we are only
322 * interested in the case we *know* the object is
323 * reachable and we have already scanned it.
325 if (((o
= lookup_object(the_repository
, remote
)) != NULL
) &&
326 (o
->flags
& COMPLETE
)) {
330 remote_hex
= oid_to_hex(remote
);
332 struct strbuf c
= STRBUF_INIT
;
333 if (multi_ack
== 2) strbuf_addstr(&c
, " multi_ack_detailed");
334 if (multi_ack
== 1) strbuf_addstr(&c
, " multi_ack");
335 if (no_done
) strbuf_addstr(&c
, " no-done");
336 if (use_sideband
== 2) strbuf_addstr(&c
, " side-band-64k");
337 if (use_sideband
== 1) strbuf_addstr(&c
, " side-band");
338 if (args
->deepen_relative
) strbuf_addstr(&c
, " deepen-relative");
339 if (args
->use_thin_pack
) strbuf_addstr(&c
, " thin-pack");
340 if (args
->no_progress
) strbuf_addstr(&c
, " no-progress");
341 if (args
->include_tag
) strbuf_addstr(&c
, " include-tag");
342 if (prefer_ofs_delta
) strbuf_addstr(&c
, " ofs-delta");
343 if (deepen_since_ok
) strbuf_addstr(&c
, " deepen-since");
344 if (deepen_not_ok
) strbuf_addstr(&c
, " deepen-not");
345 if (agent_supported
) strbuf_addf(&c
, " agent=%s",
346 git_user_agent_sanitized());
348 strbuf_addf(&c
, " session-id=%s", trace2_session_id());
349 if (args
->filter_options
.choice
)
350 strbuf_addstr(&c
, " filter");
351 packet_buf_write(&req_buf
, "want %s%s\n", remote_hex
, c
.buf
);
354 packet_buf_write(&req_buf
, "want %s\n", remote_hex
);
359 strbuf_release(&req_buf
);
364 if (is_repository_shallow(the_repository
))
365 write_shallow_commits(&req_buf
, 1, NULL
);
367 packet_buf_write(&req_buf
, "deepen %d", args
->depth
);
368 if (args
->deepen_since
) {
369 timestamp_t max_age
= approxidate(args
->deepen_since
);
370 packet_buf_write(&req_buf
, "deepen-since %"PRItime
, max_age
);
372 if (args
->deepen_not
) {
374 for (i
= 0; i
< args
->deepen_not
->nr
; i
++) {
375 struct string_list_item
*s
= args
->deepen_not
->items
+ i
;
376 packet_buf_write(&req_buf
, "deepen-not %s", s
->string
);
379 if (server_supports_filtering
&& args
->filter_options
.choice
) {
381 expand_list_objects_filter_spec(&args
->filter_options
);
382 packet_buf_write(&req_buf
, "filter %s", spec
);
384 packet_buf_flush(&req_buf
);
385 state_len
= req_buf
.len
;
389 struct object_id oid
;
391 send_request(args
, fd
[1], &req_buf
);
392 while (packet_reader_read(&reader
) == PACKET_READ_NORMAL
) {
393 if (skip_prefix(reader
.line
, "shallow ", &arg
)) {
394 if (get_oid_hex(arg
, &oid
))
395 die(_("invalid shallow line: %s"), reader
.line
);
396 register_shallow(the_repository
, &oid
);
399 if (skip_prefix(reader
.line
, "unshallow ", &arg
)) {
400 if (get_oid_hex(arg
, &oid
))
401 die(_("invalid unshallow line: %s"), reader
.line
);
402 if (!lookup_object(the_repository
, &oid
))
403 die(_("object not found: %s"), reader
.line
);
404 /* make sure that it is parsed as shallow */
405 if (!parse_object(the_repository
, &oid
))
406 die(_("error in object: %s"), reader
.line
);
407 if (unregister_shallow(&oid
))
408 die(_("no shallow found: %s"), reader
.line
);
411 die(_("expected shallow/unshallow, got %s"), reader
.line
);
413 } else if (!args
->stateless_rpc
)
414 send_request(args
, fd
[1], &req_buf
);
416 if (!args
->stateless_rpc
) {
417 /* If we aren't using the stateless-rpc interface
418 * we don't need to retain the headers.
420 strbuf_setlen(&req_buf
, 0);
424 trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository
);
427 while ((oid
= negotiator
->next(negotiator
))) {
428 packet_buf_write(&req_buf
, "have %s\n", oid_to_hex(oid
));
429 print_verbose(args
, "have %s", oid_to_hex(oid
));
431 if (flush_at
<= ++count
) {
434 packet_buf_flush(&req_buf
);
435 send_request(args
, fd
[1], &req_buf
);
436 strbuf_setlen(&req_buf
, state_len
);
438 flush_at
= next_flush(args
->stateless_rpc
, count
);
441 * We keep one window "ahead" of the other side, and
442 * will wait for an ACK only on the next one
444 if (!args
->stateless_rpc
&& count
== INITIAL_FLUSH
)
447 consume_shallow_list(args
, &reader
);
449 ack
= get_ack(&reader
, result_oid
);
451 print_verbose(args
, _("got %s %d %s"), "ack",
452 ack
, oid_to_hex(result_oid
));
462 struct commit
*commit
=
463 lookup_commit(the_repository
,
468 die(_("invalid commit %s"), oid_to_hex(result_oid
));
469 was_common
= negotiator
->ack(negotiator
, commit
);
470 if (args
->stateless_rpc
473 /* We need to replay the have for this object
474 * on the next RPC request so the peer knows
475 * it is in common with us.
477 const char *hex
= oid_to_hex(result_oid
);
478 packet_buf_write(&req_buf
, "have %s\n", hex
);
479 state_len
= req_buf
.len
;
481 * Reset in_vain because an ack
482 * for this commit has not been
486 } else if (!args
->stateless_rpc
487 || ack
!= ACK_common
)
491 if (ack
== ACK_ready
)
498 if (got_continue
&& MAX_IN_VAIN
< in_vain
) {
499 print_verbose(args
, _("giving up"));
507 trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository
);
508 if (!got_ready
|| !no_done
) {
509 packet_buf_write(&req_buf
, "done\n");
510 send_request(args
, fd
[1], &req_buf
);
512 print_verbose(args
, _("done"));
517 strbuf_release(&req_buf
);
519 if (!got_ready
|| !no_done
)
520 consume_shallow_list(args
, &reader
);
521 while (flushes
|| multi_ack
) {
522 int ack
= get_ack(&reader
, result_oid
);
524 print_verbose(args
, _("got %s (%d) %s"), "ack",
525 ack
, oid_to_hex(result_oid
));
533 /* it is no error to fetch into a completely empty repo */
534 return count
? retval
: 0;
537 static struct commit_list
*complete
;
539 static int mark_complete(const struct object_id
*oid
)
541 struct commit
*commit
= deref_without_lazy_fetch(oid
, 1);
543 if (commit
&& !(commit
->object
.flags
& COMPLETE
)) {
544 commit
->object
.flags
|= COMPLETE
;
545 commit_list_insert(commit
, &complete
);
550 static int mark_complete_oid(const char *refname
, const struct object_id
*oid
,
551 int flag
, void *cb_data
)
553 return mark_complete(oid
);
556 static void mark_recent_complete_commits(struct fetch_pack_args
*args
,
559 while (complete
&& cutoff
<= complete
->item
->date
) {
560 print_verbose(args
, _("Marking %s as complete"),
561 oid_to_hex(&complete
->item
->object
.oid
));
562 pop_most_recent_commit(&complete
, COMPLETE
);
566 static void add_refs_to_oidset(struct oidset
*oids
, struct ref
*refs
)
568 for (; refs
; refs
= refs
->next
)
569 oidset_insert(oids
, &refs
->old_oid
);
572 static int is_unmatched_ref(const struct ref
*ref
)
574 struct object_id oid
;
576 return ref
->match_status
== REF_NOT_MATCHED
&&
577 !parse_oid_hex(ref
->name
, &oid
, &p
) &&
579 oideq(&oid
, &ref
->old_oid
);
582 static void filter_refs(struct fetch_pack_args
*args
,
584 struct ref
**sought
, int nr_sought
)
586 struct ref
*newlist
= NULL
;
587 struct ref
**newtail
= &newlist
;
588 struct ref
*unmatched
= NULL
;
589 struct ref
*ref
, *next
;
590 struct oidset tip_oids
= OIDSET_INIT
;
592 int strict
= !(allow_unadvertised_object_request
&
593 (ALLOW_TIP_SHA1
| ALLOW_REACHABLE_SHA1
));
596 for (ref
= *refs
; ref
; ref
= next
) {
600 if (starts_with(ref
->name
, "refs/") &&
601 check_refname_format(ref
->name
, 0)) {
603 * trash or a peeled value; do not even add it to
609 while (i
< nr_sought
) {
610 int cmp
= strcmp(ref
->name
, sought
[i
]->name
);
612 break; /* definitely do not have it */
614 keep
= 1; /* definitely have it */
615 sought
[i
]->match_status
= REF_MATCHED
;
620 if (!keep
&& args
->fetch_all
&&
621 (!args
->deepen
|| !starts_with(ref
->name
, "refs/tags/")))
628 newtail
= &ref
->next
;
630 ref
->next
= unmatched
;
636 for (i
= 0; i
< nr_sought
; i
++) {
638 if (!is_unmatched_ref(ref
))
641 add_refs_to_oidset(&tip_oids
, unmatched
);
642 add_refs_to_oidset(&tip_oids
, newlist
);
647 /* Append unmatched requests to the list */
648 for (i
= 0; i
< nr_sought
; i
++) {
650 if (!is_unmatched_ref(ref
))
653 if (!strict
|| oidset_contains(&tip_oids
, &ref
->old_oid
)) {
654 ref
->match_status
= REF_MATCHED
;
655 *newtail
= copy_ref(ref
);
656 newtail
= &(*newtail
)->next
;
658 ref
->match_status
= REF_UNADVERTISED_NOT_ALLOWED
;
662 oidset_clear(&tip_oids
);
663 free_refs(unmatched
);
668 static void mark_alternate_complete(struct fetch_negotiator
*unused
,
671 mark_complete(&obj
->oid
);
674 struct loose_object_iter
{
675 struct oidset
*loose_object_set
;
680 * Mark recent commits available locally and reachable from a local ref as
683 * The cutoff time for recency is determined by this heuristic: it is the
684 * earliest commit time of the objects in refs that are commits and that we know
685 * the commit time of.
687 static void mark_complete_and_common_ref(struct fetch_negotiator
*negotiator
,
688 struct fetch_pack_args
*args
,
692 int old_save_commit_buffer
= save_commit_buffer
;
693 timestamp_t cutoff
= 0;
695 save_commit_buffer
= 0;
697 trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL
);
698 for (ref
= *refs
; ref
; ref
= ref
->next
) {
701 if (!has_object_file_with_flags(&ref
->old_oid
,
703 OBJECT_INFO_SKIP_FETCH_OBJECT
))
705 o
= parse_object(the_repository
, &ref
->old_oid
);
710 * We already have it -- which may mean that we were
711 * in sync with the other side at some time after
712 * that (it is OK if we guess wrong here).
714 if (o
->type
== OBJ_COMMIT
) {
715 struct commit
*commit
= (struct commit
*)o
;
716 if (!cutoff
|| cutoff
< commit
->date
)
717 cutoff
= commit
->date
;
720 trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL
);
723 * This block marks all local refs as COMPLETE, and then recursively marks all
724 * parents of those refs as COMPLETE.
726 trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL
);
728 for_each_rawref(mark_complete_oid
, NULL
);
729 for_each_cached_alternate(NULL
, mark_alternate_complete
);
730 commit_list_sort_by_date(&complete
);
732 mark_recent_complete_commits(args
, cutoff
);
734 trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL
);
737 * Mark all complete remote refs as common refs.
738 * Don't mark them common yet; the server has to be told so first.
740 trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL
);
741 for (ref
= *refs
; ref
; ref
= ref
->next
) {
742 struct commit
*c
= deref_without_lazy_fetch(&ref
->old_oid
, 0);
744 if (!c
|| !(c
->object
.flags
& COMPLETE
))
747 negotiator
->known_common(negotiator
, c
);
749 trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL
);
751 save_commit_buffer
= old_save_commit_buffer
;
755 * Returns 1 if every object pointed to by the given remote refs is available
756 * locally and reachable from a local ref, and 0 otherwise.
758 static int everything_local(struct fetch_pack_args
*args
,
764 for (retval
= 1, ref
= *refs
; ref
; ref
= ref
->next
) {
765 const struct object_id
*remote
= &ref
->old_oid
;
768 o
= lookup_object(the_repository
, remote
);
769 if (!o
|| !(o
->flags
& COMPLETE
)) {
771 print_verbose(args
, "want %s (%s)", oid_to_hex(remote
),
775 print_verbose(args
, _("already have %s (%s)"), oid_to_hex(remote
),
782 static int sideband_demux(int in
, int out
, void *data
)
787 ret
= recv_sideband("fetch-pack", xd
[0], out
);
792 static void create_promisor_file(const char *keep_name
,
793 struct ref
**sought
, int nr_sought
)
795 struct strbuf promisor_name
= STRBUF_INIT
;
798 strbuf_addstr(&promisor_name
, keep_name
);
799 suffix_stripped
= strbuf_strip_suffix(&promisor_name
, ".keep");
800 if (!suffix_stripped
)
801 BUG("name of pack lockfile should end with .keep (was '%s')",
803 strbuf_addstr(&promisor_name
, ".promisor");
805 write_promisor_file(promisor_name
.buf
, sought
, nr_sought
);
807 strbuf_release(&promisor_name
);
810 static void parse_gitmodules_oids(int fd
, struct oidset
*gitmodules_oids
)
812 int len
= the_hash_algo
->hexsz
+ 1; /* hash + NL */
815 char hex_hash
[GIT_MAX_HEXSZ
+ 1];
816 int read_len
= read_in_full(fd
, hex_hash
, len
);
817 struct object_id oid
;
823 die("invalid length read %d", read_len
);
824 if (parse_oid_hex(hex_hash
, &oid
, &end
) || *end
!= '\n')
826 oidset_insert(gitmodules_oids
, &oid
);
831 * If packfile URIs were provided, pass a non-NULL pointer to index_pack_args.
832 * The strings to pass as the --index-pack-arg arguments to http-fetch will be
833 * stored there. (It must be freed by the caller.)
835 static int get_pack(struct fetch_pack_args
*args
,
836 int xd
[2], struct string_list
*pack_lockfiles
,
837 struct strvec
*index_pack_args
,
838 struct ref
**sought
, int nr_sought
,
839 struct oidset
*gitmodules_oids
)
842 int do_keep
= args
->keep_pack
;
843 const char *cmd_name
;
844 struct pack_header header
;
846 struct child_process cmd
= CHILD_PROCESS_INIT
;
847 int fsck_objects
= 0;
850 memset(&demux
, 0, sizeof(demux
));
852 /* xd[] is talking with upload-pack; subprocess reads from
853 * xd[0], spits out band#2 to stderr, and feeds us band#1
854 * through demux->out.
856 demux
.proc
= sideband_demux
;
859 demux
.isolate_sigpipe
= 1;
860 if (start_async(&demux
))
861 die(_("fetch-pack: unable to fork off sideband demultiplexer"));
866 if (!args
->keep_pack
&& unpack_limit
&& !index_pack_args
) {
868 if (read_pack_header(demux
.out
, &header
))
869 die(_("protocol error: bad pack header"));
871 if (ntohl(header
.hdr_entries
) < unpack_limit
)
877 if (alternate_shallow_file
) {
878 strvec_push(&cmd
.args
, "--shallow-file");
879 strvec_push(&cmd
.args
, alternate_shallow_file
);
882 if (fetch_fsck_objects
>= 0
884 : transfer_fsck_objects
>= 0
885 ? transfer_fsck_objects
889 if (do_keep
|| args
->from_promisor
|| index_pack_args
|| fsck_objects
) {
890 if (pack_lockfiles
|| fsck_objects
)
892 cmd_name
= "index-pack";
893 strvec_push(&cmd
.args
, cmd_name
);
894 strvec_push(&cmd
.args
, "--stdin");
895 if (!args
->quiet
&& !args
->no_progress
)
896 strvec_push(&cmd
.args
, "-v");
897 if (args
->use_thin_pack
)
898 strvec_push(&cmd
.args
, "--fix-thin");
899 if ((do_keep
|| index_pack_args
) && (args
->lock_pack
|| unpack_limit
)) {
900 char hostname
[HOST_NAME_MAX
+ 1];
901 if (xgethostname(hostname
, sizeof(hostname
)))
902 xsnprintf(hostname
, sizeof(hostname
), "localhost");
903 strvec_pushf(&cmd
.args
,
904 "--keep=fetch-pack %"PRIuMAX
" on %s",
905 (uintmax_t)getpid(), hostname
);
907 if (!index_pack_args
&& args
->check_self_contained_and_connected
)
908 strvec_push(&cmd
.args
, "--check-self-contained-and-connected");
911 * We cannot perform any connectivity checks because
912 * not all packs have been downloaded; let the caller
913 * have this responsibility.
915 args
->check_self_contained_and_connected
= 0;
917 if (args
->from_promisor
)
919 * create_promisor_file() may be called afterwards but
920 * we still need index-pack to know that this is a
921 * promisor pack. For example, if transfer.fsckobjects
922 * is true, index-pack needs to know that .gitmodules
923 * is a promisor object (so that it won't complain if
926 strvec_push(&cmd
.args
, "--promisor");
929 cmd_name
= "unpack-objects";
930 strvec_push(&cmd
.args
, cmd_name
);
931 if (args
->quiet
|| args
->no_progress
)
932 strvec_push(&cmd
.args
, "-q");
933 args
->check_self_contained_and_connected
= 0;
937 strvec_pushf(&cmd
.args
, "--pack_header=%"PRIu32
",%"PRIu32
,
938 ntohl(header
.hdr_version
),
939 ntohl(header
.hdr_entries
));
941 if (args
->from_promisor
|| index_pack_args
)
943 * We cannot use --strict in index-pack because it
944 * checks both broken objects and links, but we only
945 * want to check for broken objects.
947 strvec_push(&cmd
.args
, "--fsck-objects");
949 strvec_pushf(&cmd
.args
, "--strict%s",
953 if (index_pack_args
) {
956 for (i
= 0; i
< cmd
.args
.nr
; i
++)
957 strvec_push(index_pack_args
, cmd
.args
.v
[i
]);
960 sigchain_push(SIGPIPE
, SIG_IGN
);
964 if (start_command(&cmd
))
965 die(_("fetch-pack: unable to fork off %s"), cmd_name
);
966 if (do_keep
&& (pack_lockfiles
|| fsck_objects
)) {
968 char *pack_lockfile
= index_pack_lockfile(cmd
.out
, &is_well_formed
);
971 die(_("fetch-pack: invalid index-pack output"));
973 string_list_append_nodup(pack_lockfiles
, pack_lockfile
);
974 parse_gitmodules_oids(cmd
.out
, gitmodules_oids
);
979 /* Closed by start_command() */
982 ret
= finish_command(&cmd
);
983 if (!ret
|| (args
->check_self_contained_and_connected
&& ret
== 1))
984 args
->self_contained_and_connected
=
985 args
->check_self_contained_and_connected
&&
988 die(_("%s failed"), cmd_name
);
989 if (use_sideband
&& finish_async(&demux
))
990 die(_("error in sideband demultiplexer"));
992 sigchain_pop(SIGPIPE
);
995 * Now that index-pack has succeeded, write the promisor file using the
996 * obtained .keep filename if necessary
998 if (do_keep
&& pack_lockfiles
&& pack_lockfiles
->nr
&& args
->from_promisor
)
999 create_promisor_file(pack_lockfiles
->items
[0].string
, sought
, nr_sought
);
1004 static int cmp_ref_by_name(const void *a_
, const void *b_
)
1006 const struct ref
*a
= *((const struct ref
**)a_
);
1007 const struct ref
*b
= *((const struct ref
**)b_
);
1008 return strcmp(a
->name
, b
->name
);
1011 static struct ref
*do_fetch_pack(struct fetch_pack_args
*args
,
1013 const struct ref
*orig_ref
,
1014 struct ref
**sought
, int nr_sought
,
1015 struct shallow_info
*si
,
1016 struct string_list
*pack_lockfiles
)
1018 struct repository
*r
= the_repository
;
1019 struct ref
*ref
= copy_ref_list(orig_ref
);
1020 struct object_id oid
;
1021 const char *agent_feature
;
1023 struct fetch_negotiator negotiator_alloc
;
1024 struct fetch_negotiator
*negotiator
;
1026 negotiator
= &negotiator_alloc
;
1027 fetch_negotiator_init(r
, negotiator
);
1029 sort_ref_list(&ref
, ref_compare_name
);
1030 QSORT(sought
, nr_sought
, cmp_ref_by_name
);
1032 if ((agent_feature
= server_feature_value("agent", &agent_len
))) {
1033 agent_supported
= 1;
1035 print_verbose(args
, _("Server version is %.*s"),
1036 agent_len
, agent_feature
);
1039 if (!server_supports("session-id"))
1042 if (server_supports("shallow"))
1043 print_verbose(args
, _("Server supports %s"), "shallow");
1044 else if (args
->depth
> 0 || is_repository_shallow(r
))
1045 die(_("Server does not support shallow clients"));
1046 if (args
->depth
> 0 || args
->deepen_since
|| args
->deepen_not
)
1048 if (server_supports("multi_ack_detailed")) {
1049 print_verbose(args
, _("Server supports %s"), "multi_ack_detailed");
1051 if (server_supports("no-done")) {
1052 print_verbose(args
, _("Server supports %s"), "no-done");
1053 if (args
->stateless_rpc
)
1057 else if (server_supports("multi_ack")) {
1058 print_verbose(args
, _("Server supports %s"), "multi_ack");
1061 if (server_supports("side-band-64k")) {
1062 print_verbose(args
, _("Server supports %s"), "side-band-64k");
1065 else if (server_supports("side-band")) {
1066 print_verbose(args
, _("Server supports %s"), "side-band");
1069 if (server_supports("allow-tip-sha1-in-want")) {
1070 print_verbose(args
, _("Server supports %s"), "allow-tip-sha1-in-want");
1071 allow_unadvertised_object_request
|= ALLOW_TIP_SHA1
;
1073 if (server_supports("allow-reachable-sha1-in-want")) {
1074 print_verbose(args
, _("Server supports %s"), "allow-reachable-sha1-in-want");
1075 allow_unadvertised_object_request
|= ALLOW_REACHABLE_SHA1
;
1077 if (server_supports("thin-pack"))
1078 print_verbose(args
, _("Server supports %s"), "thin-pack");
1080 args
->use_thin_pack
= 0;
1081 if (server_supports("no-progress"))
1082 print_verbose(args
, _("Server supports %s"), "no-progress");
1084 args
->no_progress
= 0;
1085 if (server_supports("include-tag"))
1086 print_verbose(args
, _("Server supports %s"), "include-tag");
1088 args
->include_tag
= 0;
1089 if (server_supports("ofs-delta"))
1090 print_verbose(args
, _("Server supports %s"), "ofs-delta");
1092 prefer_ofs_delta
= 0;
1094 if (server_supports("filter")) {
1095 server_supports_filtering
= 1;
1096 print_verbose(args
, _("Server supports %s"), "filter");
1097 } else if (args
->filter_options
.choice
) {
1098 warning("filtering not recognized by server, ignoring");
1101 if (server_supports("deepen-since")) {
1102 print_verbose(args
, _("Server supports %s"), "deepen-since");
1103 deepen_since_ok
= 1;
1104 } else if (args
->deepen_since
)
1105 die(_("Server does not support --shallow-since"));
1106 if (server_supports("deepen-not")) {
1107 print_verbose(args
, _("Server supports %s"), "deepen-not");
1109 } else if (args
->deepen_not
)
1110 die(_("Server does not support --shallow-exclude"));
1111 if (server_supports("deepen-relative"))
1112 print_verbose(args
, _("Server supports %s"), "deepen-relative");
1113 else if (args
->deepen_relative
)
1114 die(_("Server does not support --deepen"));
1115 if (!server_supports_hash(the_hash_algo
->name
, NULL
))
1116 die(_("Server does not support this repository's object format"));
1118 mark_complete_and_common_ref(negotiator
, args
, &ref
);
1119 filter_refs(args
, &ref
, sought
, nr_sought
);
1120 if (everything_local(args
, &ref
)) {
1121 packet_flush(fd
[1]);
1124 if (find_common(negotiator
, args
, fd
, &oid
, ref
) < 0)
1125 if (!args
->keep_pack
)
1126 /* When cloning, it is not unusual to have
1129 warning(_("no common commits"));
1131 if (args
->stateless_rpc
)
1132 packet_flush(fd
[1]);
1134 setup_alternate_shallow(&shallow_lock
, &alternate_shallow_file
,
1136 else if (si
->nr_ours
|| si
->nr_theirs
) {
1137 if (args
->reject_shallow_remote
)
1138 die(_("source repository is shallow, reject to clone."));
1139 alternate_shallow_file
= setup_temporary_shallow(si
->shallow
);
1141 alternate_shallow_file
= NULL
;
1142 if (get_pack(args
, fd
, pack_lockfiles
, NULL
, sought
, nr_sought
,
1143 &fsck_options
.gitmodules_found
))
1144 die(_("git fetch-pack: fetch failed."));
1145 if (fsck_finish(&fsck_options
))
1150 negotiator
->release(negotiator
);
1154 static void add_shallow_requests(struct strbuf
*req_buf
,
1155 const struct fetch_pack_args
*args
)
1157 if (is_repository_shallow(the_repository
))
1158 write_shallow_commits(req_buf
, 1, NULL
);
1159 if (args
->depth
> 0)
1160 packet_buf_write(req_buf
, "deepen %d", args
->depth
);
1161 if (args
->deepen_since
) {
1162 timestamp_t max_age
= approxidate(args
->deepen_since
);
1163 packet_buf_write(req_buf
, "deepen-since %"PRItime
, max_age
);
1165 if (args
->deepen_not
) {
1167 for (i
= 0; i
< args
->deepen_not
->nr
; i
++) {
1168 struct string_list_item
*s
= args
->deepen_not
->items
+ i
;
1169 packet_buf_write(req_buf
, "deepen-not %s", s
->string
);
1172 if (args
->deepen_relative
)
1173 packet_buf_write(req_buf
, "deepen-relative\n");
1176 static void add_wants(const struct ref
*wants
, struct strbuf
*req_buf
)
1178 int use_ref_in_want
= server_supports_feature("fetch", "ref-in-want", 0);
1180 for ( ; wants
; wants
= wants
->next
) {
1181 const struct object_id
*remote
= &wants
->old_oid
;
1185 * If that object is complete (i.e. it is an ancestor of a
1186 * local ref), we tell them we have it but do not have to
1187 * tell them about its ancestors, which they already know
1190 * We use lookup_object here because we are only
1191 * interested in the case we *know* the object is
1192 * reachable and we have already scanned it.
1194 if (((o
= lookup_object(the_repository
, remote
)) != NULL
) &&
1195 (o
->flags
& COMPLETE
)) {
1199 if (!use_ref_in_want
|| wants
->exact_oid
)
1200 packet_buf_write(req_buf
, "want %s\n", oid_to_hex(remote
));
1202 packet_buf_write(req_buf
, "want-ref %s\n", wants
->name
);
1206 static void add_common(struct strbuf
*req_buf
, struct oidset
*common
)
1208 struct oidset_iter iter
;
1209 const struct object_id
*oid
;
1210 oidset_iter_init(common
, &iter
);
1212 while ((oid
= oidset_iter_next(&iter
))) {
1213 packet_buf_write(req_buf
, "have %s\n", oid_to_hex(oid
));
1217 static int add_haves(struct fetch_negotiator
*negotiator
,
1218 struct strbuf
*req_buf
,
1221 int haves_added
= 0;
1222 const struct object_id
*oid
;
1224 while ((oid
= negotiator
->next(negotiator
))) {
1225 packet_buf_write(req_buf
, "have %s\n", oid_to_hex(oid
));
1226 if (++haves_added
>= *haves_to_send
)
1230 /* Increase haves to send on next round */
1231 *haves_to_send
= next_flush(1, *haves_to_send
);
1236 static void write_fetch_command_and_capabilities(struct strbuf
*req_buf
,
1237 const struct string_list
*server_options
)
1239 const char *hash_name
;
1241 if (server_supports_v2("fetch", 1))
1242 packet_buf_write(req_buf
, "command=fetch");
1243 if (server_supports_v2("agent", 0))
1244 packet_buf_write(req_buf
, "agent=%s", git_user_agent_sanitized());
1245 if (advertise_sid
&& server_supports_v2("session-id", 0))
1246 packet_buf_write(req_buf
, "session-id=%s", trace2_session_id());
1247 if (server_options
&& server_options
->nr
&&
1248 server_supports_v2("server-option", 1)) {
1250 for (i
= 0; i
< server_options
->nr
; i
++)
1251 packet_buf_write(req_buf
, "server-option=%s",
1252 server_options
->items
[i
].string
);
1255 if (server_feature_v2("object-format", &hash_name
)) {
1256 int hash_algo
= hash_algo_by_name(hash_name
);
1257 if (hash_algo_by_ptr(the_hash_algo
) != hash_algo
)
1258 die(_("mismatched algorithms: client %s; server %s"),
1259 the_hash_algo
->name
, hash_name
);
1260 packet_buf_write(req_buf
, "object-format=%s", the_hash_algo
->name
);
1261 } else if (hash_algo_by_ptr(the_hash_algo
) != GIT_HASH_SHA1
) {
1262 die(_("the server does not support algorithm '%s'"),
1263 the_hash_algo
->name
);
1265 packet_buf_delim(req_buf
);
1268 static int send_fetch_request(struct fetch_negotiator
*negotiator
, int fd_out
,
1269 struct fetch_pack_args
*args
,
1270 const struct ref
*wants
, struct oidset
*common
,
1271 int *haves_to_send
, int *in_vain
,
1272 int sideband_all
, int seen_ack
)
1276 struct strbuf req_buf
= STRBUF_INIT
;
1278 write_fetch_command_and_capabilities(&req_buf
, args
->server_options
);
1280 if (args
->use_thin_pack
)
1281 packet_buf_write(&req_buf
, "thin-pack");
1282 if (args
->no_progress
)
1283 packet_buf_write(&req_buf
, "no-progress");
1284 if (args
->include_tag
)
1285 packet_buf_write(&req_buf
, "include-tag");
1286 if (prefer_ofs_delta
)
1287 packet_buf_write(&req_buf
, "ofs-delta");
1289 packet_buf_write(&req_buf
, "sideband-all");
1291 /* Add shallow-info and deepen request */
1292 if (server_supports_feature("fetch", "shallow", 0))
1293 add_shallow_requests(&req_buf
, args
);
1294 else if (is_repository_shallow(the_repository
) || args
->deepen
)
1295 die(_("Server does not support shallow requests"));
1298 if (server_supports_feature("fetch", "filter", 0) &&
1299 args
->filter_options
.choice
) {
1301 expand_list_objects_filter_spec(&args
->filter_options
);
1302 print_verbose(args
, _("Server supports filter"));
1303 packet_buf_write(&req_buf
, "filter %s", spec
);
1304 } else if (args
->filter_options
.choice
) {
1305 warning("filtering not recognized by server, ignoring");
1308 if (server_supports_feature("fetch", "packfile-uris", 0)) {
1310 struct strbuf to_send
= STRBUF_INIT
;
1312 for (i
= 0; i
< uri_protocols
.nr
; i
++) {
1313 const char *s
= uri_protocols
.items
[i
].string
;
1315 if (!strcmp(s
, "https") || !strcmp(s
, "http")) {
1317 strbuf_addch(&to_send
, ',');
1318 strbuf_addstr(&to_send
, s
);
1322 packet_buf_write(&req_buf
, "packfile-uris %s",
1324 strbuf_release(&to_send
);
1329 add_wants(wants
, &req_buf
);
1331 /* Add all of the common commits we've found in previous rounds */
1332 add_common(&req_buf
, common
);
1334 haves_added
= add_haves(negotiator
, &req_buf
, haves_to_send
);
1335 *in_vain
+= haves_added
;
1336 if (!haves_added
|| (seen_ack
&& *in_vain
>= MAX_IN_VAIN
)) {
1338 packet_buf_write(&req_buf
, "done\n");
1343 packet_buf_flush(&req_buf
);
1344 if (write_in_full(fd_out
, req_buf
.buf
, req_buf
.len
) < 0)
1345 die_errno(_("unable to write request to remote"));
1347 strbuf_release(&req_buf
);
1352 * Processes a section header in a server's response and checks if it matches
1353 * `section`. If the value of `peek` is 1, the header line will be peeked (and
1354 * not consumed); if 0, the line will be consumed and the function will die if
1355 * the section header doesn't match what was expected.
1357 static int process_section_header(struct packet_reader
*reader
,
1358 const char *section
, int peek
)
1362 if (packet_reader_peek(reader
) != PACKET_READ_NORMAL
)
1363 die(_("error reading section header '%s'"), section
);
1365 ret
= !strcmp(reader
->line
, section
);
1369 die(_("expected '%s', received '%s'"),
1370 section
, reader
->line
);
1371 packet_reader_read(reader
);
1377 static int process_ack(struct fetch_negotiator
*negotiator
,
1378 struct packet_reader
*reader
,
1379 struct object_id
*common_oid
,
1380 int *received_ready
)
1382 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1385 if (!strcmp(reader
->line
, "NAK"))
1388 if (skip_prefix(reader
->line
, "ACK ", &arg
)) {
1389 if (!get_oid_hex(arg
, common_oid
)) {
1390 struct commit
*commit
;
1391 commit
= lookup_commit(the_repository
, common_oid
);
1393 negotiator
->ack(negotiator
, commit
);
1398 if (!strcmp(reader
->line
, "ready")) {
1399 *received_ready
= 1;
1403 die(_("unexpected acknowledgment line: '%s'"), reader
->line
);
1406 if (reader
->status
!= PACKET_READ_FLUSH
&&
1407 reader
->status
!= PACKET_READ_DELIM
)
1408 die(_("error processing acks: %d"), reader
->status
);
1411 * If an "acknowledgments" section is sent, a packfile is sent if and
1412 * only if "ready" was sent in this section. The other sections
1413 * ("shallow-info" and "wanted-refs") are sent only if a packfile is
1414 * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH
1417 if (*received_ready
&& reader
->status
!= PACKET_READ_DELIM
)
1419 * TRANSLATORS: The parameter will be 'ready', a protocol
1422 die(_("expected packfile to be sent after '%s'"), "ready");
1423 if (!*received_ready
&& reader
->status
!= PACKET_READ_FLUSH
)
1425 * TRANSLATORS: The parameter will be 'ready', a protocol
1428 die(_("expected no other sections to be sent after no '%s'"), "ready");
1433 static void receive_shallow_info(struct fetch_pack_args
*args
,
1434 struct packet_reader
*reader
,
1435 struct oid_array
*shallows
,
1436 struct shallow_info
*si
)
1438 int unshallow_received
= 0;
1440 process_section_header(reader
, "shallow-info", 0);
1441 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1443 struct object_id oid
;
1445 if (skip_prefix(reader
->line
, "shallow ", &arg
)) {
1446 if (get_oid_hex(arg
, &oid
))
1447 die(_("invalid shallow line: %s"), reader
->line
);
1448 oid_array_append(shallows
, &oid
);
1451 if (skip_prefix(reader
->line
, "unshallow ", &arg
)) {
1452 if (get_oid_hex(arg
, &oid
))
1453 die(_("invalid unshallow line: %s"), reader
->line
);
1454 if (!lookup_object(the_repository
, &oid
))
1455 die(_("object not found: %s"), reader
->line
);
1456 /* make sure that it is parsed as shallow */
1457 if (!parse_object(the_repository
, &oid
))
1458 die(_("error in object: %s"), reader
->line
);
1459 if (unregister_shallow(&oid
))
1460 die(_("no shallow found: %s"), reader
->line
);
1461 unshallow_received
= 1;
1464 die(_("expected shallow/unshallow, got %s"), reader
->line
);
1467 if (reader
->status
!= PACKET_READ_FLUSH
&&
1468 reader
->status
!= PACKET_READ_DELIM
)
1469 die(_("error processing shallow info: %d"), reader
->status
);
1471 if (args
->deepen
|| unshallow_received
) {
1473 * Treat these as shallow lines caused by our depth settings.
1474 * In v0, these lines cannot cause refs to be rejected; do the
1479 for (i
= 0; i
< shallows
->nr
; i
++)
1480 register_shallow(the_repository
, &shallows
->oid
[i
]);
1481 setup_alternate_shallow(&shallow_lock
, &alternate_shallow_file
,
1484 } else if (shallows
->nr
) {
1486 * Treat these as shallow lines caused by the remote being
1487 * shallow. In v0, remote refs that reach these objects are
1488 * rejected (unless --update-shallow is set); do the same.
1490 prepare_shallow_info(si
, shallows
);
1491 if (si
->nr_ours
|| si
->nr_theirs
) {
1492 if (args
->reject_shallow_remote
)
1493 die(_("source repository is shallow, reject to clone."));
1494 alternate_shallow_file
=
1495 setup_temporary_shallow(si
->shallow
);
1497 alternate_shallow_file
= NULL
;
1499 alternate_shallow_file
= NULL
;
1503 static int cmp_name_ref(const void *name
, const void *ref
)
1505 return strcmp(name
, (*(struct ref
**)ref
)->name
);
1508 static void receive_wanted_refs(struct packet_reader
*reader
,
1509 struct ref
**sought
, int nr_sought
)
1511 process_section_header(reader
, "wanted-refs", 0);
1512 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1513 struct object_id oid
;
1517 if (parse_oid_hex(reader
->line
, &oid
, &end
) || *end
++ != ' ')
1518 die(_("expected wanted-ref, got '%s'"), reader
->line
);
1520 found
= bsearch(end
, sought
, nr_sought
, sizeof(*sought
),
1523 die(_("unexpected wanted-ref: '%s'"), reader
->line
);
1524 oidcpy(&(*found
)->old_oid
, &oid
);
1527 if (reader
->status
!= PACKET_READ_DELIM
)
1528 die(_("error processing wanted refs: %d"), reader
->status
);
1531 static void receive_packfile_uris(struct packet_reader
*reader
,
1532 struct string_list
*uris
)
1534 process_section_header(reader
, "packfile-uris", 0);
1535 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
1536 if (reader
->pktlen
< the_hash_algo
->hexsz
||
1537 reader
->line
[the_hash_algo
->hexsz
] != ' ')
1538 die("expected '<hash> <uri>', got: %s\n", reader
->line
);
1540 string_list_append(uris
, reader
->line
);
1542 if (reader
->status
!= PACKET_READ_DELIM
)
1543 die("expected DELIM");
1547 FETCH_CHECK_LOCAL
= 0,
1554 static void do_check_stateless_delimiter(int stateless_rpc
,
1555 struct packet_reader
*reader
)
1557 check_stateless_delimiter(stateless_rpc
, reader
,
1558 _("git fetch-pack: expected response end packet"));
1561 static struct ref
*do_fetch_pack_v2(struct fetch_pack_args
*args
,
1563 const struct ref
*orig_ref
,
1564 struct ref
**sought
, int nr_sought
,
1565 struct oid_array
*shallows
,
1566 struct shallow_info
*si
,
1567 struct string_list
*pack_lockfiles
)
1569 struct repository
*r
= the_repository
;
1570 struct ref
*ref
= copy_ref_list(orig_ref
);
1571 enum fetch_state state
= FETCH_CHECK_LOCAL
;
1572 struct oidset common
= OIDSET_INIT
;
1573 struct packet_reader reader
;
1574 int in_vain
= 0, negotiation_started
= 0;
1575 int haves_to_send
= INITIAL_FLUSH
;
1576 struct fetch_negotiator negotiator_alloc
;
1577 struct fetch_negotiator
*negotiator
;
1579 struct object_id common_oid
;
1580 int received_ready
= 0;
1581 struct string_list packfile_uris
= STRING_LIST_INIT_DUP
;
1583 struct strvec index_pack_args
= STRVEC_INIT
;
1585 negotiator
= &negotiator_alloc
;
1586 fetch_negotiator_init(r
, negotiator
);
1588 packet_reader_init(&reader
, fd
[0], NULL
, 0,
1589 PACKET_READ_CHOMP_NEWLINE
|
1590 PACKET_READ_DIE_ON_ERR_PACKET
);
1591 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) &&
1592 server_supports_feature("fetch", "sideband-all", 0)) {
1593 reader
.use_sideband
= 1;
1594 reader
.me
= "fetch-pack";
1597 while (state
!= FETCH_DONE
) {
1599 case FETCH_CHECK_LOCAL
:
1600 sort_ref_list(&ref
, ref_compare_name
);
1601 QSORT(sought
, nr_sought
, cmp_ref_by_name
);
1603 /* v2 supports these by default */
1604 allow_unadvertised_object_request
|= ALLOW_REACHABLE_SHA1
;
1606 if (args
->depth
> 0 || args
->deepen_since
|| args
->deepen_not
)
1609 /* Filter 'ref' by 'sought' and those that aren't local */
1610 mark_complete_and_common_ref(negotiator
, args
, &ref
);
1611 filter_refs(args
, &ref
, sought
, nr_sought
);
1612 if (everything_local(args
, &ref
))
1615 state
= FETCH_SEND_REQUEST
;
1617 mark_tips(negotiator
, args
->negotiation_tips
);
1618 for_each_cached_alternate(negotiator
,
1619 insert_one_alternate_object
);
1621 case FETCH_SEND_REQUEST
:
1622 if (!negotiation_started
) {
1623 negotiation_started
= 1;
1624 trace2_region_enter("fetch-pack",
1628 if (send_fetch_request(negotiator
, fd
[1], args
, ref
,
1630 &haves_to_send
, &in_vain
,
1631 reader
.use_sideband
,
1633 state
= FETCH_GET_PACK
;
1635 state
= FETCH_PROCESS_ACKS
;
1637 case FETCH_PROCESS_ACKS
:
1638 /* Process ACKs/NAKs */
1639 process_section_header(&reader
, "acknowledgments", 0);
1640 while (process_ack(negotiator
, &reader
, &common_oid
,
1644 oidset_insert(&common
, &common_oid
);
1646 if (received_ready
) {
1648 * Don't check for response delimiter; get_pack() will
1649 * read the rest of this response.
1651 state
= FETCH_GET_PACK
;
1653 do_check_stateless_delimiter(args
->stateless_rpc
, &reader
);
1654 state
= FETCH_SEND_REQUEST
;
1657 case FETCH_GET_PACK
:
1658 trace2_region_leave("fetch-pack",
1661 /* Check for shallow-info section */
1662 if (process_section_header(&reader
, "shallow-info", 1))
1663 receive_shallow_info(args
, &reader
, shallows
, si
);
1665 if (process_section_header(&reader
, "wanted-refs", 1))
1666 receive_wanted_refs(&reader
, sought
, nr_sought
);
1668 /* get the pack(s) */
1669 if (git_env_bool("GIT_TRACE_REDACT", 1))
1670 reader
.options
|= PACKET_READ_REDACT_URI_PATH
;
1671 if (process_section_header(&reader
, "packfile-uris", 1))
1672 receive_packfile_uris(&reader
, &packfile_uris
);
1673 /* We don't expect more URIs. Reset to avoid expensive URI check. */
1674 reader
.options
&= ~PACKET_READ_REDACT_URI_PATH
;
1676 process_section_header(&reader
, "packfile", 0);
1679 * this is the final request we'll make of the server;
1680 * do a half-duplex shutdown to indicate that they can
1681 * hang up as soon as the pack is sent.
1686 if (get_pack(args
, fd
, pack_lockfiles
,
1687 packfile_uris
.nr
? &index_pack_args
: NULL
,
1688 sought
, nr_sought
, &fsck_options
.gitmodules_found
))
1689 die(_("git fetch-pack: fetch failed."));
1690 do_check_stateless_delimiter(args
->stateless_rpc
, &reader
);
1699 for (i
= 0; i
< packfile_uris
.nr
; i
++) {
1701 struct child_process cmd
= CHILD_PROCESS_INIT
;
1702 char packname
[GIT_MAX_HEXSZ
+ 1];
1703 const char *uri
= packfile_uris
.items
[i
].string
+
1704 the_hash_algo
->hexsz
+ 1;
1706 strvec_push(&cmd
.args
, "http-fetch");
1707 strvec_pushf(&cmd
.args
, "--packfile=%.*s",
1708 (int) the_hash_algo
->hexsz
,
1709 packfile_uris
.items
[i
].string
);
1710 for (j
= 0; j
< index_pack_args
.nr
; j
++)
1711 strvec_pushf(&cmd
.args
, "--index-pack-arg=%s",
1712 index_pack_args
.v
[j
]);
1713 strvec_push(&cmd
.args
, uri
);
1717 if (start_command(&cmd
))
1718 die("fetch-pack: unable to spawn http-fetch");
1720 if (read_in_full(cmd
.out
, packname
, 5) < 0 ||
1721 memcmp(packname
, "keep\t", 5))
1722 die("fetch-pack: expected keep then TAB at start of http-fetch output");
1724 if (read_in_full(cmd
.out
, packname
,
1725 the_hash_algo
->hexsz
+ 1) < 0 ||
1726 packname
[the_hash_algo
->hexsz
] != '\n')
1727 die("fetch-pack: expected hash then LF at end of http-fetch output");
1729 packname
[the_hash_algo
->hexsz
] = '\0';
1731 parse_gitmodules_oids(cmd
.out
, &fsck_options
.gitmodules_found
);
1735 if (finish_command(&cmd
))
1736 die("fetch-pack: unable to finish http-fetch");
1738 if (memcmp(packfile_uris
.items
[i
].string
, packname
,
1739 the_hash_algo
->hexsz
))
1740 die("fetch-pack: pack downloaded from %s does not match expected hash %.*s",
1741 uri
, (int) the_hash_algo
->hexsz
,
1742 packfile_uris
.items
[i
].string
);
1744 string_list_append_nodup(pack_lockfiles
,
1745 xstrfmt("%s/pack/pack-%s.keep",
1746 get_object_directory(),
1749 string_list_clear(&packfile_uris
, 0);
1750 strvec_clear(&index_pack_args
);
1752 if (fsck_finish(&fsck_options
))
1756 negotiator
->release(negotiator
);
1758 oidset_clear(&common
);
1762 static int fetch_pack_config_cb(const char *var
, const char *value
, void *cb
)
1764 if (strcmp(var
, "fetch.fsck.skiplist") == 0) {
1767 if (git_config_pathname(&path
, var
, value
))
1769 strbuf_addf(&fsck_msg_types
, "%cskiplist=%s",
1770 fsck_msg_types
.len
? ',' : '=', path
);
1775 if (skip_prefix(var
, "fetch.fsck.", &var
)) {
1776 if (is_valid_msg_type(var
, value
))
1777 strbuf_addf(&fsck_msg_types
, "%c%s=%s",
1778 fsck_msg_types
.len
? ',' : '=', var
, value
);
1780 warning("Skipping unknown msg id '%s'", var
);
1784 return git_default_config(var
, value
, cb
);
1787 static void fetch_pack_config(void)
1789 git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit
);
1790 git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit
);
1791 git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta
);
1792 git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects
);
1793 git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects
);
1794 git_config_get_bool("transfer.advertisesid", &advertise_sid
);
1795 if (!uri_protocols
.nr
) {
1798 if (!git_config_get_string("fetch.uriprotocols", &str
) && str
) {
1799 string_list_split(&uri_protocols
, str
, ',', -1);
1804 git_config(fetch_pack_config_cb
, NULL
);
1807 static void fetch_pack_setup(void)
1809 static int did_setup
;
1812 fetch_pack_config();
1813 if (0 <= transfer_unpack_limit
)
1814 unpack_limit
= transfer_unpack_limit
;
1815 else if (0 <= fetch_unpack_limit
)
1816 unpack_limit
= fetch_unpack_limit
;
1820 static int remove_duplicates_in_refs(struct ref
**ref
, int nr
)
1822 struct string_list names
= STRING_LIST_INIT_NODUP
;
1825 for (src
= dst
= 0; src
< nr
; src
++) {
1826 struct string_list_item
*item
;
1827 item
= string_list_insert(&names
, ref
[src
]->name
);
1829 continue; /* already have it */
1830 item
->util
= ref
[src
];
1832 ref
[dst
] = ref
[src
];
1835 for (src
= dst
; src
< nr
; src
++)
1837 string_list_clear(&names
, 0);
1841 static void update_shallow(struct fetch_pack_args
*args
,
1842 struct ref
**sought
, int nr_sought
,
1843 struct shallow_info
*si
)
1845 struct oid_array ref
= OID_ARRAY_INIT
;
1849 if (args
->deepen
&& alternate_shallow_file
) {
1850 if (*alternate_shallow_file
== '\0') { /* --unshallow */
1851 unlink_or_warn(git_path_shallow(the_repository
));
1852 rollback_shallow_file(the_repository
, &shallow_lock
);
1854 commit_shallow_file(the_repository
, &shallow_lock
);
1855 alternate_shallow_file
= NULL
;
1859 if (!si
->shallow
|| !si
->shallow
->nr
)
1862 if (args
->cloning
) {
1864 * remote is shallow, but this is a clone, there are
1865 * no objects in repo to worry about. Accept any
1866 * shallow points that exist in the pack (iow in repo
1867 * after get_pack() and reprepare_packed_git())
1869 struct oid_array extra
= OID_ARRAY_INIT
;
1870 struct object_id
*oid
= si
->shallow
->oid
;
1871 for (i
= 0; i
< si
->shallow
->nr
; i
++)
1872 if (has_object_file(&oid
[i
]))
1873 oid_array_append(&extra
, &oid
[i
]);
1875 setup_alternate_shallow(&shallow_lock
,
1876 &alternate_shallow_file
,
1878 commit_shallow_file(the_repository
, &shallow_lock
);
1879 alternate_shallow_file
= NULL
;
1881 oid_array_clear(&extra
);
1885 if (!si
->nr_ours
&& !si
->nr_theirs
)
1888 remove_nonexistent_theirs_shallow(si
);
1889 if (!si
->nr_ours
&& !si
->nr_theirs
)
1891 for (i
= 0; i
< nr_sought
; i
++)
1892 oid_array_append(&ref
, &sought
[i
]->old_oid
);
1895 if (args
->update_shallow
) {
1897 * remote is also shallow, .git/shallow may be updated
1898 * so all refs can be accepted. Make sure we only add
1899 * shallow roots that are actually reachable from new
1902 struct oid_array extra
= OID_ARRAY_INIT
;
1903 struct object_id
*oid
= si
->shallow
->oid
;
1904 assign_shallow_commits_to_refs(si
, NULL
, NULL
);
1905 if (!si
->nr_ours
&& !si
->nr_theirs
) {
1906 oid_array_clear(&ref
);
1909 for (i
= 0; i
< si
->nr_ours
; i
++)
1910 oid_array_append(&extra
, &oid
[si
->ours
[i
]]);
1911 for (i
= 0; i
< si
->nr_theirs
; i
++)
1912 oid_array_append(&extra
, &oid
[si
->theirs
[i
]]);
1913 setup_alternate_shallow(&shallow_lock
,
1914 &alternate_shallow_file
,
1916 commit_shallow_file(the_repository
, &shallow_lock
);
1917 oid_array_clear(&extra
);
1918 oid_array_clear(&ref
);
1919 alternate_shallow_file
= NULL
;
1924 * remote is also shallow, check what ref is safe to update
1925 * without updating .git/shallow
1927 CALLOC_ARRAY(status
, nr_sought
);
1928 assign_shallow_commits_to_refs(si
, NULL
, status
);
1929 if (si
->nr_ours
|| si
->nr_theirs
) {
1930 for (i
= 0; i
< nr_sought
; i
++)
1932 sought
[i
]->status
= REF_STATUS_REJECT_SHALLOW
;
1935 oid_array_clear(&ref
);
1938 static const struct object_id
*iterate_ref_map(void *cb_data
)
1940 struct ref
**rm
= cb_data
;
1941 struct ref
*ref
= *rm
;
1946 return &ref
->old_oid
;
1949 struct ref
*fetch_pack(struct fetch_pack_args
*args
,
1951 const struct ref
*ref
,
1952 struct ref
**sought
, int nr_sought
,
1953 struct oid_array
*shallow
,
1954 struct string_list
*pack_lockfiles
,
1955 enum protocol_version version
)
1957 struct ref
*ref_cpy
;
1958 struct shallow_info si
;
1959 struct oid_array shallows_scratch
= OID_ARRAY_INIT
;
1963 nr_sought
= remove_duplicates_in_refs(sought
, nr_sought
);
1965 if (version
!= protocol_v2
&& !ref
) {
1966 packet_flush(fd
[1]);
1967 die(_("no matching remote head"));
1969 if (version
== protocol_v2
) {
1971 BUG("Protocol V2 does not provide shallows at this point in the fetch");
1972 memset(&si
, 0, sizeof(si
));
1973 ref_cpy
= do_fetch_pack_v2(args
, fd
, ref
, sought
, nr_sought
,
1974 &shallows_scratch
, &si
,
1977 prepare_shallow_info(&si
, shallow
);
1978 ref_cpy
= do_fetch_pack(args
, fd
, ref
, sought
, nr_sought
,
1979 &si
, pack_lockfiles
);
1981 reprepare_packed_git(the_repository
);
1983 if (!args
->cloning
&& args
->deepen
) {
1984 struct check_connected_options opt
= CHECK_CONNECTED_INIT
;
1985 struct ref
*iterator
= ref_cpy
;
1986 opt
.shallow_file
= alternate_shallow_file
;
1988 opt
.is_deepening_fetch
= 1;
1989 if (check_connected(iterate_ref_map
, &iterator
, &opt
)) {
1990 error(_("remote did not send all necessary objects"));
1993 rollback_shallow_file(the_repository
, &shallow_lock
);
1996 args
->connectivity_checked
= 1;
1999 update_shallow(args
, sought
, nr_sought
, &si
);
2001 clear_shallow_info(&si
);
2002 oid_array_clear(&shallows_scratch
);
2006 static int add_to_object_array(const struct object_id
*oid
, void *data
)
2008 struct object_array
*a
= data
;
2010 add_object_array(lookup_object(the_repository
, oid
), "", a
);
2014 static void clear_common_flag(struct oidset
*s
)
2016 struct oidset_iter iter
;
2017 const struct object_id
*oid
;
2018 oidset_iter_init(s
, &iter
);
2020 while ((oid
= oidset_iter_next(&iter
))) {
2021 struct object
*obj
= lookup_object(the_repository
, oid
);
2022 obj
->flags
&= ~COMMON
;
2026 void negotiate_using_fetch(const struct oid_array
*negotiation_tips
,
2027 const struct string_list
*server_options
,
2030 struct oidset
*acked_commits
)
2032 struct fetch_negotiator negotiator
;
2033 struct packet_reader reader
;
2034 struct object_array nt_object_array
= OBJECT_ARRAY_INIT
;
2035 struct strbuf req_buf
= STRBUF_INIT
;
2036 int haves_to_send
= INITIAL_FLUSH
;
2039 int last_iteration
= 0;
2040 timestamp_t min_generation
= GENERATION_NUMBER_INFINITY
;
2042 fetch_negotiator_init(the_repository
, &negotiator
);
2043 mark_tips(&negotiator
, negotiation_tips
);
2045 packet_reader_init(&reader
, fd
[0], NULL
, 0,
2046 PACKET_READ_CHOMP_NEWLINE
|
2047 PACKET_READ_DIE_ON_ERR_PACKET
);
2049 oid_array_for_each((struct oid_array
*) negotiation_tips
,
2050 add_to_object_array
,
2053 while (!last_iteration
) {
2055 struct object_id common_oid
;
2056 int received_ready
= 0;
2058 strbuf_reset(&req_buf
);
2059 write_fetch_command_and_capabilities(&req_buf
, server_options
);
2061 packet_buf_write(&req_buf
, "wait-for-done");
2063 haves_added
= add_haves(&negotiator
, &req_buf
, &haves_to_send
);
2064 in_vain
+= haves_added
;
2065 if (!haves_added
|| (seen_ack
&& in_vain
>= MAX_IN_VAIN
))
2069 packet_buf_flush(&req_buf
);
2070 if (write_in_full(fd
[1], req_buf
.buf
, req_buf
.len
) < 0)
2071 die_errno(_("unable to write request to remote"));
2073 /* Process ACKs/NAKs */
2074 process_section_header(&reader
, "acknowledgments", 0);
2075 while (process_ack(&negotiator
, &reader
, &common_oid
,
2077 struct commit
*commit
= lookup_commit(the_repository
,
2080 timestamp_t generation
;
2082 parse_commit_or_die(commit
);
2083 commit
->object
.flags
|= COMMON
;
2084 generation
= commit_graph_generation(commit
);
2085 if (generation
< min_generation
)
2086 min_generation
= generation
;
2090 oidset_insert(acked_commits
, &common_oid
);
2093 die(_("unexpected 'ready' from remote"));
2095 do_check_stateless_delimiter(stateless_rpc
, &reader
);
2096 if (can_all_from_reach_with_flag(&nt_object_array
, COMMON
,
2101 clear_common_flag(acked_commits
);
2102 strbuf_release(&req_buf
);
2105 int report_unmatched_refs(struct ref
**sought
, int nr_sought
)
2109 for (i
= 0; i
< nr_sought
; i
++) {
2112 switch (sought
[i
]->match_status
) {
2115 case REF_NOT_MATCHED
:
2116 error(_("no such remote ref %s"), sought
[i
]->name
);
2118 case REF_UNADVERTISED_NOT_ALLOWED
:
2119 error(_("Server does not allow request for unadvertised object %s"),