1 #include "git-compat-util.h"
4 #include "run-command.h"
6 #include "environment.h"
9 #include "object-name.h"
10 #include "repository.h"
12 #include "string-list.h"
13 #include "thread-utils.h"
18 #include "transport-internal.h"
26 struct child_process
*helper
;
35 stateless_connect
: 1,
37 check_connectivity
: 1,
38 no_disconnect_req
: 1,
39 no_private_update
: 1,
43 * As an optimization, the transport code may invoke fetch before
44 * get_refs_list. If this happens, and if the transport helper doesn't
45 * support connect or stateless_connect, we need to invoke
46 * get_refs_list ourselves if we haven't already done so. Keep track of
47 * whether we have invoked get_refs_list.
49 unsigned get_refs_list_called
: 1;
53 /* These go from remote name (as in "list") to private name */
55 /* Transport options for fetch-pack/send-pack (should one of
58 struct git_transport_options transport_options
;
61 static void sendline(struct helper_data
*helper
, struct strbuf
*buffer
)
64 fprintf(stderr
, "Debug: Remote helper: -> %s", buffer
->buf
);
65 if (write_in_full(helper
->helper
->in
, buffer
->buf
, buffer
->len
) < 0)
66 die_errno(_("full write to remote helper failed"));
69 static int recvline_fh(FILE *helper
, struct strbuf
*buffer
)
73 fprintf(stderr
, "Debug: Remote helper: Waiting...\n");
74 if (strbuf_getline(buffer
, helper
) == EOF
) {
76 fprintf(stderr
, "Debug: Remote helper quit.\n");
81 fprintf(stderr
, "Debug: Remote helper: <- %s\n", buffer
->buf
);
85 static int recvline(struct helper_data
*helper
, struct strbuf
*buffer
)
87 return recvline_fh(helper
->out
, buffer
);
90 static void write_constant(int fd
, const char *str
)
93 fprintf(stderr
, "Debug: Remote helper: -> %s", str
);
94 if (write_in_full(fd
, str
, strlen(str
)) < 0)
95 die_errno(_("full write to remote helper failed"));
98 static const char *remove_ext_force(const char *url
)
101 const char *colon
= strchr(url
, ':');
102 if (colon
&& colon
[1] == ':')
108 static void do_take_over(struct transport
*transport
)
110 struct helper_data
*data
;
111 data
= (struct helper_data
*)transport
->data
;
112 transport_take_over(transport
, data
->helper
);
118 static void standard_options(struct transport
*t
);
120 static struct child_process
*get_helper(struct transport
*transport
)
122 struct helper_data
*data
= transport
->data
;
123 struct strbuf buf
= STRBUF_INIT
;
124 struct child_process
*helper
;
131 helper
= xmalloc(sizeof(*helper
));
132 child_process_init(helper
);
136 strvec_pushf(&helper
->args
, "remote-%s", data
->name
);
137 strvec_push(&helper
->args
, transport
->remote
->name
);
138 strvec_push(&helper
->args
, remove_ext_force(transport
->url
));
140 helper
->silent_exec_failure
= 1;
143 strvec_pushf(&helper
->env
, "%s=%s",
144 GIT_DIR_ENVIRONMENT
, get_git_dir());
146 helper
->trace2_child_class
= helper
->args
.v
[0]; /* "remote-<name>" */
148 code
= start_command(helper
);
149 if (code
< 0 && errno
== ENOENT
)
150 die(_("unable to find remote helper for '%s'"), data
->name
);
154 data
->helper
= helper
;
155 data
->no_disconnect_req
= 0;
156 refspec_init(&data
->rs
, REFSPEC_FETCH
);
159 * Open the output as FILE* so strbuf_getline_*() family of
160 * functions can be used.
161 * Do this with duped fd because fclose() will close the fd,
162 * and stuff like taking over will require the fd to remain.
164 duped
= dup(helper
->out
);
166 die_errno(_("can't dup helper output fd"));
167 data
->out
= xfdopen(duped
, "r");
169 write_constant(helper
->in
, "capabilities\n");
172 const char *capname
, *arg
;
174 if (recvline(data
, &buf
))
180 if (*buf
.buf
== '*') {
181 capname
= buf
.buf
+ 1;
187 fprintf(stderr
, "Debug: Got cap %s\n", capname
);
188 if (!strcmp(capname
, "fetch"))
190 else if (!strcmp(capname
, "option"))
192 else if (!strcmp(capname
, "push"))
194 else if (!strcmp(capname
, "import"))
196 else if (!strcmp(capname
, "bidi-import"))
197 data
->bidi_import
= 1;
198 else if (!strcmp(capname
, "export"))
200 else if (!strcmp(capname
, "check-connectivity"))
201 data
->check_connectivity
= 1;
202 else if (skip_prefix(capname
, "refspec ", &arg
)) {
203 refspec_append(&data
->rs
, arg
);
204 } else if (!strcmp(capname
, "connect")) {
206 } else if (!strcmp(capname
, "stateless-connect")) {
207 data
->stateless_connect
= 1;
208 } else if (!strcmp(capname
, "signed-tags")) {
209 data
->signed_tags
= 1;
210 } else if (skip_prefix(capname
, "export-marks ", &arg
)) {
211 data
->export_marks
= xstrdup(arg
);
212 } else if (skip_prefix(capname
, "import-marks ", &arg
)) {
213 data
->import_marks
= xstrdup(arg
);
214 } else if (starts_with(capname
, "no-private-update")) {
215 data
->no_private_update
= 1;
216 } else if (starts_with(capname
, "object-format")) {
217 data
->object_format
= 1;
218 } else if (mandatory
) {
219 die(_("unknown mandatory capability %s; this remote "
220 "helper probably needs newer version of Git"),
224 if (!data
->rs
.nr
&& (data
->import
|| data
->bidi_import
|| data
->export
)) {
225 warning(_("this remote helper should implement refspec capability"));
227 strbuf_release(&buf
);
229 fprintf(stderr
, "Debug: Capabilities complete.\n");
230 standard_options(transport
);
234 static int disconnect_helper(struct transport
*transport
)
236 struct helper_data
*data
= transport
->data
;
241 fprintf(stderr
, "Debug: Disconnecting.\n");
242 if (!data
->no_disconnect_req
) {
244 * Ignore write errors; there's nothing we can do,
245 * since we're about to close the pipe anyway. And the
246 * most likely error is EPIPE due to the helper dying
247 * to report an error itself.
249 sigchain_push(SIGPIPE
, SIG_IGN
);
250 xwrite(data
->helper
->in
, "\n", 1);
251 sigchain_pop(SIGPIPE
);
253 close(data
->helper
->in
);
254 close(data
->helper
->out
);
256 res
= finish_command(data
->helper
);
257 FREE_AND_NULL(data
->name
);
258 FREE_AND_NULL(data
->helper
);
263 static const char *unsupported_options
[] = {
264 TRANS_OPT_UPLOADPACK
,
265 TRANS_OPT_RECEIVEPACK
,
270 static const char *boolean_options
[] = {
273 TRANS_OPT_FOLLOWTAGS
,
274 TRANS_OPT_DEEPEN_RELATIVE
277 static int strbuf_set_helper_option(struct helper_data
*data
,
283 if (recvline(data
, buf
))
286 if (!strcmp(buf
->buf
, "ok"))
288 else if (starts_with(buf
->buf
, "error"))
290 else if (!strcmp(buf
->buf
, "unsupported"))
293 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
->buf
);
299 static int string_list_set_helper_option(struct helper_data
*data
,
301 struct string_list
*list
)
303 struct strbuf buf
= STRBUF_INIT
;
306 for (i
= 0; i
< list
->nr
; i
++) {
307 strbuf_addf(&buf
, "option %s ", name
);
308 quote_c_style(list
->items
[i
].string
, &buf
, NULL
, 0);
309 strbuf_addch(&buf
, '\n');
311 if ((ret
= strbuf_set_helper_option(data
, &buf
)))
315 strbuf_release(&buf
);
319 static int set_helper_option(struct transport
*transport
,
320 const char *name
, const char *value
)
322 struct helper_data
*data
= transport
->data
;
323 struct strbuf buf
= STRBUF_INIT
;
324 int i
, ret
, is_bool
= 0;
326 get_helper(transport
);
331 if (!strcmp(name
, "deepen-not"))
332 return string_list_set_helper_option(data
, name
,
333 (struct string_list
*)value
);
335 for (i
= 0; i
< ARRAY_SIZE(unsupported_options
); i
++) {
336 if (!strcmp(name
, unsupported_options
[i
]))
340 for (i
= 0; i
< ARRAY_SIZE(boolean_options
); i
++) {
341 if (!strcmp(name
, boolean_options
[i
])) {
347 strbuf_addf(&buf
, "option %s ", name
);
349 strbuf_addstr(&buf
, value
? "true" : "false");
351 quote_c_style(value
, &buf
, NULL
, 0);
352 strbuf_addch(&buf
, '\n');
354 ret
= strbuf_set_helper_option(data
, &buf
);
355 strbuf_release(&buf
);
359 static void standard_options(struct transport
*t
)
364 set_helper_option(t
, "progress", t
->progress
? "true" : "false");
366 xsnprintf(buf
, sizeof(buf
), "%d", v
+ 1);
367 set_helper_option(t
, "verbosity", buf
);
370 case TRANSPORT_FAMILY_ALL
:
372 * this is already the default,
373 * do not break old remote helpers by setting "all" here
376 case TRANSPORT_FAMILY_IPV4
:
377 set_helper_option(t
, "family", "ipv4");
379 case TRANSPORT_FAMILY_IPV6
:
380 set_helper_option(t
, "family", "ipv6");
385 static int release_helper(struct transport
*transport
)
388 struct helper_data
*data
= transport
->data
;
389 refspec_clear(&data
->rs
);
390 res
= disconnect_helper(transport
);
391 free(transport
->data
);
395 static int fetch_with_fetch(struct transport
*transport
,
396 int nr_heads
, struct ref
**to_fetch
)
398 struct helper_data
*data
= transport
->data
;
400 struct strbuf buf
= STRBUF_INIT
;
402 for (i
= 0; i
< nr_heads
; i
++) {
403 const struct ref
*posn
= to_fetch
[i
];
404 if (posn
->status
& REF_STATUS_UPTODATE
)
407 strbuf_addf(&buf
, "fetch %s %s\n",
408 oid_to_hex(&posn
->old_oid
),
409 posn
->symref
? posn
->symref
: posn
->name
);
412 strbuf_addch(&buf
, '\n');
413 sendline(data
, &buf
);
418 if (recvline(data
, &buf
))
421 if (skip_prefix(buf
.buf
, "lock ", &name
)) {
422 if (transport
->pack_lockfiles
.nr
)
423 warning(_("%s also locked %s"), data
->name
, name
);
425 string_list_append(&transport
->pack_lockfiles
,
428 else if (data
->check_connectivity
&&
429 data
->transport_options
.check_self_contained_and_connected
&&
430 !strcmp(buf
.buf
, "connectivity-ok"))
431 data
->transport_options
.self_contained_and_connected
= 1;
435 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
.buf
);
437 strbuf_release(&buf
);
439 reprepare_packed_git(the_repository
);
443 static int get_importer(struct transport
*transport
, struct child_process
*fastimport
)
445 struct child_process
*helper
= get_helper(transport
);
446 struct helper_data
*data
= transport
->data
;
447 int cat_blob_fd
, code
;
448 child_process_init(fastimport
);
449 fastimport
->in
= xdup(helper
->out
);
450 strvec_push(&fastimport
->args
, "fast-import");
451 strvec_push(&fastimport
->args
, "--allow-unsafe-features");
452 strvec_push(&fastimport
->args
, debug
? "--stats" : "--quiet");
454 if (data
->bidi_import
) {
455 cat_blob_fd
= xdup(helper
->in
);
456 strvec_pushf(&fastimport
->args
, "--cat-blob-fd=%d", cat_blob_fd
);
458 fastimport
->git_cmd
= 1;
460 code
= start_command(fastimport
);
464 static int get_exporter(struct transport
*transport
,
465 struct child_process
*fastexport
,
466 struct string_list
*revlist_args
)
468 struct helper_data
*data
= transport
->data
;
469 struct child_process
*helper
= get_helper(transport
);
472 child_process_init(fastexport
);
474 /* we need to duplicate helper->in because we want to use it after
475 * fastexport is done with it. */
476 fastexport
->out
= dup(helper
->in
);
477 strvec_push(&fastexport
->args
, "fast-export");
478 strvec_push(&fastexport
->args
, "--use-done-feature");
479 strvec_push(&fastexport
->args
, data
->signed_tags
?
480 "--signed-tags=verbatim" : "--signed-tags=warn-strip");
481 if (data
->export_marks
)
482 strvec_pushf(&fastexport
->args
, "--export-marks=%s.tmp", data
->export_marks
);
483 if (data
->import_marks
)
484 strvec_pushf(&fastexport
->args
, "--import-marks=%s", data
->import_marks
);
486 for (i
= 0; i
< revlist_args
->nr
; i
++)
487 strvec_push(&fastexport
->args
, revlist_args
->items
[i
].string
);
489 fastexport
->git_cmd
= 1;
490 return start_command(fastexport
);
493 static int fetch_with_import(struct transport
*transport
,
494 int nr_heads
, struct ref
**to_fetch
)
496 struct child_process fastimport
;
497 struct helper_data
*data
= transport
->data
;
500 struct strbuf buf
= STRBUF_INIT
;
502 get_helper(transport
);
504 if (get_importer(transport
, &fastimport
))
505 die(_("couldn't run fast-import"));
507 for (i
= 0; i
< nr_heads
; i
++) {
509 if (posn
->status
& REF_STATUS_UPTODATE
)
512 strbuf_addf(&buf
, "import %s\n",
513 posn
->symref
? posn
->symref
: posn
->name
);
514 sendline(data
, &buf
);
518 write_constant(data
->helper
->in
, "\n");
520 * remote-helpers that advertise the bidi-import capability are required to
521 * buffer the complete batch of import commands until this newline before
522 * sending data to fast-import.
523 * These helpers read back data from fast-import on their stdin, which could
524 * be mixed with import commands, otherwise.
527 if (finish_command(&fastimport
))
528 die(_("error while running fast-import"));
531 * The fast-import stream of a remote helper that advertises
532 * the "refspec" capability writes to the refs named after the
533 * right hand side of the first refspec matching each ref we
536 * (If no "refspec" capability was specified, for historical
537 * reasons we default to the equivalent of *:*.)
539 * Store the result in to_fetch[i].old_sha1. Callers such
540 * as "git fetch" can use the value to write feedback to the
541 * terminal, populate FETCH_HEAD, and determine what new value
542 * should be written to peer_ref if the update is a
543 * fast-forward or this is a forced update.
545 for (i
= 0; i
< nr_heads
; i
++) {
546 char *private, *name
;
548 if (posn
->status
& REF_STATUS_UPTODATE
)
550 name
= posn
->symref
? posn
->symref
: posn
->name
;
552 private = apply_refspecs(&data
->rs
, name
);
554 private = xstrdup(name
);
556 if (refs_read_ref(get_main_ref_store(the_repository
), private, &posn
->old_oid
) < 0)
557 die(_("could not read ref %s"), private);
561 strbuf_release(&buf
);
565 static int run_connect(struct transport
*transport
, struct strbuf
*cmdbuf
)
567 struct helper_data
*data
= transport
->data
;
571 struct child_process
*helper
;
573 helper
= get_helper(transport
);
576 * Yes, dup the pipe another time, as we need unbuffered version
577 * of input pipe as FILE*. fclose() closes the underlying fd and
578 * stream buffering only can be changed before first I/O operation
581 duped
= dup(helper
->out
);
583 die_errno(_("can't dup helper output fd"));
584 input
= xfdopen(duped
, "r");
585 setvbuf(input
, NULL
, _IONBF
, 0);
587 sendline(data
, cmdbuf
);
588 if (recvline_fh(input
, cmdbuf
))
591 if (!strcmp(cmdbuf
->buf
, "")) {
592 data
->no_disconnect_req
= 1;
594 fprintf(stderr
, "Debug: Smart transport connection "
597 } else if (!strcmp(cmdbuf
->buf
, "fallback")) {
599 fprintf(stderr
, "Debug: Falling back to dumb "
602 die(_("unknown response to connect: %s"),
610 static int process_connect_service(struct transport
*transport
,
611 const char *name
, const char *exec
)
613 struct helper_data
*data
= transport
->data
;
614 struct strbuf cmdbuf
= STRBUF_INIT
;
618 * Handle --upload-pack and friends. This is fire and forget...
619 * just warn if it fails.
621 if (strcmp(name
, exec
)) {
622 int r
= set_helper_option(transport
, "servpath", exec
);
624 warning(_("setting remote service path not supported by protocol"));
626 warning(_("invalid remote service path"));
630 strbuf_addf(&cmdbuf
, "connect %s\n", name
);
631 ret
= run_connect(transport
, &cmdbuf
);
632 } else if (data
->stateless_connect
&&
633 (get_protocol_version_config() == protocol_v2
) &&
634 (!strcmp("git-upload-pack", name
) ||
635 !strcmp("git-upload-archive", name
))) {
636 strbuf_addf(&cmdbuf
, "stateless-connect %s\n", name
);
637 ret
= run_connect(transport
, &cmdbuf
);
639 transport
->stateless_rpc
= 1;
642 strbuf_release(&cmdbuf
);
646 static int process_connect(struct transport
*transport
,
649 struct helper_data
*data
= transport
->data
;
654 name
= for_push
? "git-receive-pack" : "git-upload-pack";
656 exec
= data
->transport_options
.receivepack
;
658 exec
= data
->transport_options
.uploadpack
;
660 ret
= process_connect_service(transport
, name
, exec
);
662 do_take_over(transport
);
666 static int connect_helper(struct transport
*transport
, const char *name
,
667 const char *exec
, int fd
[2])
669 struct helper_data
*data
= transport
->data
;
671 /* Get_helper so connect is inited. */
672 get_helper(transport
);
674 if (!process_connect_service(transport
, name
, exec
))
675 die(_("can't connect to subservice %s"), name
);
677 fd
[0] = data
->helper
->out
;
678 fd
[1] = data
->helper
->in
;
680 do_take_over(transport
);
684 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
687 static int fetch_refs(struct transport
*transport
,
688 int nr_heads
, struct ref
**to_fetch
)
690 struct helper_data
*data
= transport
->data
;
693 get_helper(transport
);
695 if (process_connect(transport
, 0))
696 return transport
->vtable
->fetch_refs(transport
, nr_heads
, to_fetch
);
699 * If we reach here, then the server, the client, and/or the transport
700 * helper does not support protocol v2. --negotiate-only requires
703 if (data
->transport_options
.acked_commits
) {
704 warning(_("--negotiate-only requires protocol v2"));
708 if (!data
->get_refs_list_called
)
709 get_refs_list_using_list(transport
, 0);
712 for (i
= 0; i
< nr_heads
; i
++)
713 if (!(to_fetch
[i
]->status
& REF_STATUS_UPTODATE
))
719 if (data
->check_connectivity
&&
720 data
->transport_options
.check_self_contained_and_connected
)
721 set_helper_option(transport
, "check-connectivity", "true");
723 if (transport
->cloning
)
724 set_helper_option(transport
, "cloning", "true");
726 if (data
->transport_options
.update_shallow
)
727 set_helper_option(transport
, "update-shallow", "true");
729 if (data
->transport_options
.refetch
)
730 set_helper_option(transport
, "refetch", "true");
732 if (data
->transport_options
.filter_options
.choice
) {
733 const char *spec
= expand_list_objects_filter_spec(
734 &data
->transport_options
.filter_options
);
735 set_helper_option(transport
, "filter", spec
);
738 if (data
->transport_options
.negotiation_tips
)
739 warning("Ignoring --negotiation-tip because the protocol does not support it.");
742 return fetch_with_fetch(transport
, nr_heads
, to_fetch
);
745 return fetch_with_import(transport
, nr_heads
, to_fetch
);
750 struct push_update_ref_state
{
752 struct ref_push_report
*report
;
756 static int push_update_ref_status(struct strbuf
*buf
,
757 struct push_update_ref_state
*state
,
758 struct ref
*remote_refs
)
761 int status
, forced
= 0;
763 if (starts_with(buf
->buf
, "option ")) {
764 struct object_id old_oid
, new_oid
;
765 const char *key
, *val
;
768 if (!state
->hint
|| !(state
->report
|| state
->new_report
))
769 die(_("'option' without a matching 'ok/error' directive"));
770 if (state
->new_report
) {
771 if (!state
->hint
->report
) {
772 CALLOC_ARRAY(state
->hint
->report
, 1);
773 state
->report
= state
->hint
->report
;
775 state
->report
= state
->hint
->report
;
776 while (state
->report
->next
)
777 state
->report
= state
->report
->next
;
778 CALLOC_ARRAY(state
->report
->next
, 1);
779 state
->report
= state
->report
->next
;
781 state
->new_report
= 0;
784 p
= strchr(key
, ' ');
788 if (!strcmp(key
, "refname"))
789 state
->report
->ref_name
= xstrdup_or_null(val
);
790 else if (!strcmp(key
, "old-oid") && val
&&
791 !parse_oid_hex(val
, &old_oid
, &val
))
792 state
->report
->old_oid
= oiddup(&old_oid
);
793 else if (!strcmp(key
, "new-oid") && val
&&
794 !parse_oid_hex(val
, &new_oid
, &val
))
795 state
->report
->new_oid
= oiddup(&new_oid
);
796 else if (!strcmp(key
, "forced-update"))
797 state
->report
->forced_update
= 1;
798 /* Not update remote namespace again. */
802 state
->report
= NULL
;
803 state
->new_report
= 0;
805 if (starts_with(buf
->buf
, "ok ")) {
806 status
= REF_STATUS_OK
;
807 refname
= buf
->buf
+ 3;
808 } else if (starts_with(buf
->buf
, "error ")) {
809 status
= REF_STATUS_REMOTE_REJECT
;
810 refname
= buf
->buf
+ 6;
812 die(_("expected ok/error, helper said '%s'"), buf
->buf
);
814 msg
= strchr(refname
, ' ');
816 struct strbuf msg_buf
= STRBUF_INIT
;
820 if (!unquote_c_style(&msg_buf
, msg
, &end
))
821 msg
= strbuf_detach(&msg_buf
, NULL
);
824 strbuf_release(&msg_buf
);
826 if (!strcmp(msg
, "no match")) {
827 status
= REF_STATUS_NONE
;
830 else if (!strcmp(msg
, "up to date")) {
831 status
= REF_STATUS_UPTODATE
;
834 else if (!strcmp(msg
, "non-fast forward")) {
835 status
= REF_STATUS_REJECT_NONFASTFORWARD
;
838 else if (!strcmp(msg
, "already exists")) {
839 status
= REF_STATUS_REJECT_ALREADY_EXISTS
;
842 else if (!strcmp(msg
, "fetch first")) {
843 status
= REF_STATUS_REJECT_FETCH_FIRST
;
846 else if (!strcmp(msg
, "needs force")) {
847 status
= REF_STATUS_REJECT_NEEDS_FORCE
;
850 else if (!strcmp(msg
, "stale info")) {
851 status
= REF_STATUS_REJECT_STALE
;
854 else if (!strcmp(msg
, "remote ref updated since checkout")) {
855 status
= REF_STATUS_REJECT_REMOTE_UPDATED
;
858 else if (!strcmp(msg
, "forced update")) {
862 else if (!strcmp(msg
, "expecting report")) {
863 status
= REF_STATUS_EXPECTING_REPORT
;
869 state
->hint
= find_ref_by_name(state
->hint
, refname
);
871 state
->hint
= find_ref_by_name(remote_refs
, refname
);
873 warning(_("helper reported unexpected status of %s"), refname
);
877 if (state
->hint
->status
!= REF_STATUS_NONE
) {
879 * Earlier, the ref was marked not to be pushed, so ignore the ref
880 * status reported by the remote helper if the latter is 'no match'.
882 if (status
== REF_STATUS_NONE
)
886 if (status
== REF_STATUS_OK
)
887 state
->new_report
= 1;
888 state
->hint
->status
= status
;
889 state
->hint
->forced_update
|= forced
;
890 state
->hint
->remote_status
= msg
;
891 return !(status
== REF_STATUS_OK
);
894 static int push_update_refs_status(struct helper_data
*data
,
895 struct ref
*remote_refs
,
899 struct ref_push_report
*report
;
900 struct strbuf buf
= STRBUF_INIT
;
901 struct push_update_ref_state state
= { remote_refs
, NULL
, 0 };
904 if (recvline(data
, &buf
)) {
905 strbuf_release(&buf
);
910 push_update_ref_status(&buf
, &state
, remote_refs
);
912 strbuf_release(&buf
);
914 if (flags
& TRANSPORT_PUSH_DRY_RUN
|| !data
->rs
.nr
|| data
->no_private_update
)
917 /* propagate back the update to the remote namespace */
918 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
921 if (ref
->status
!= REF_STATUS_OK
)
925 private = apply_refspecs(&data
->rs
, ref
->name
);
928 refs_update_ref(get_main_ref_store(the_repository
),
929 "update by helper", private,
934 for (report
= ref
->report
; report
; report
= report
->next
) {
935 private = apply_refspecs(&data
->rs
,
941 refs_update_ref(get_main_ref_store(the_repository
),
942 "update by helper", private,
954 static void set_common_push_options(struct transport
*transport
,
955 const char *name
, int flags
)
957 if (flags
& TRANSPORT_PUSH_DRY_RUN
) {
958 if (set_helper_option(transport
, "dry-run", "true") != 0)
959 die(_("helper %s does not support dry-run"), name
);
960 } else if (flags
& TRANSPORT_PUSH_CERT_ALWAYS
) {
961 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "true") != 0)
962 die(_("helper %s does not support --signed"), name
);
963 } else if (flags
& TRANSPORT_PUSH_CERT_IF_ASKED
) {
964 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "if-asked") != 0)
965 die(_("helper %s does not support --signed=if-asked"), name
);
968 if (flags
& TRANSPORT_PUSH_ATOMIC
)
969 if (set_helper_option(transport
, TRANS_OPT_ATOMIC
, "true") != 0)
970 die(_("helper %s does not support --atomic"), name
);
972 if (flags
& TRANSPORT_PUSH_FORCE_IF_INCLUDES
)
973 if (set_helper_option(transport
, TRANS_OPT_FORCE_IF_INCLUDES
, "true") != 0)
974 die(_("helper %s does not support --%s"),
975 name
, TRANS_OPT_FORCE_IF_INCLUDES
);
977 if (flags
& TRANSPORT_PUSH_OPTIONS
) {
978 struct string_list_item
*item
;
979 for_each_string_list_item(item
, transport
->push_options
)
980 if (set_helper_option(transport
, "push-option", item
->string
) != 0)
981 die(_("helper %s does not support 'push-option'"), name
);
985 static int push_refs_with_push(struct transport
*transport
,
986 struct ref
*remote_refs
, int flags
)
988 int force_all
= flags
& TRANSPORT_PUSH_FORCE
;
989 int mirror
= flags
& TRANSPORT_PUSH_MIRROR
;
990 int atomic
= flags
& TRANSPORT_PUSH_ATOMIC
;
991 struct helper_data
*data
= transport
->data
;
992 struct strbuf buf
= STRBUF_INIT
;
994 struct string_list cas_options
= STRING_LIST_INIT_DUP
;
995 struct string_list_item
*cas_option
;
997 get_helper(transport
);
1001 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1002 if (!ref
->peer_ref
&& !mirror
)
1005 /* Check for statuses set by set_ref_status_for_push() */
1006 switch (ref
->status
) {
1007 case REF_STATUS_REJECT_NONFASTFORWARD
:
1008 case REF_STATUS_REJECT_STALE
:
1009 case REF_STATUS_REJECT_ALREADY_EXISTS
:
1010 case REF_STATUS_REJECT_REMOTE_UPDATED
:
1012 reject_atomic_push(remote_refs
, mirror
);
1013 string_list_clear(&cas_options
, 0);
1017 case REF_STATUS_UPTODATE
:
1026 strbuf_addstr(&buf
, "push ");
1027 if (!ref
->deletion
) {
1029 strbuf_addch(&buf
, '+');
1031 strbuf_addstr(&buf
, ref
->peer_ref
->name
);
1033 strbuf_addstr(&buf
, oid_to_hex(&ref
->new_oid
));
1035 strbuf_addch(&buf
, ':');
1036 strbuf_addstr(&buf
, ref
->name
);
1037 strbuf_addch(&buf
, '\n');
1040 * The "--force-with-lease" options without explicit
1041 * values to expect have already been expanded into
1042 * the ref->old_oid_expect[] field; we can ignore
1043 * transport->smart_options->cas altogether and instead
1044 * can enumerate them from the refs.
1046 if (ref
->expect_old_sha1
) {
1047 struct strbuf cas
= STRBUF_INIT
;
1048 strbuf_addf(&cas
, "%s:%s",
1049 ref
->name
, oid_to_hex(&ref
->old_oid_expect
));
1050 string_list_append_nodup(&cas_options
,
1051 strbuf_detach(&cas
, NULL
));
1055 string_list_clear(&cas_options
, 0);
1059 for_each_string_list_item(cas_option
, &cas_options
)
1060 set_helper_option(transport
, "cas", cas_option
->string
);
1061 set_common_push_options(transport
, data
->name
, flags
);
1063 strbuf_addch(&buf
, '\n');
1064 sendline(data
, &buf
);
1065 strbuf_release(&buf
);
1066 string_list_clear(&cas_options
, 0);
1068 return push_update_refs_status(data
, remote_refs
, flags
);
1071 static int push_refs_with_export(struct transport
*transport
,
1072 struct ref
*remote_refs
, int flags
)
1075 struct child_process
*helper
, exporter
;
1076 struct helper_data
*data
= transport
->data
;
1077 struct string_list revlist_args
= STRING_LIST_INIT_DUP
;
1078 struct strbuf buf
= STRBUF_INIT
;
1081 die(_("remote-helper doesn't support push; refspec needed"));
1083 set_common_push_options(transport
, data
->name
, flags
);
1084 if (flags
& TRANSPORT_PUSH_FORCE
) {
1085 if (set_helper_option(transport
, "force", "true") != 0)
1086 warning(_("helper %s does not support '--force'"), data
->name
);
1089 helper
= get_helper(transport
);
1091 write_constant(helper
->in
, "export\n");
1093 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1095 struct object_id oid
;
1097 private = apply_refspecs(&data
->rs
, ref
->name
);
1098 if (private && !repo_get_oid(the_repository
, private, &oid
)) {
1099 strbuf_addf(&buf
, "^%s", private);
1100 string_list_append_nodup(&revlist_args
,
1101 strbuf_detach(&buf
, NULL
));
1102 oidcpy(&ref
->old_oid
, &oid
);
1106 if (ref
->peer_ref
) {
1107 if (strcmp(ref
->name
, ref
->peer_ref
->name
)) {
1108 if (!ref
->deletion
) {
1112 /* Follow symbolic refs (mainly for HEAD). */
1113 name
= refs_resolve_ref_unsafe(get_main_ref_store(the_repository
),
1114 ref
->peer_ref
->name
,
1115 RESOLVE_REF_READING
,
1118 if (!name
|| !(flag
& REF_ISSYMREF
))
1119 name
= ref
->peer_ref
->name
;
1121 strbuf_addf(&buf
, "%s:%s", name
, ref
->name
);
1123 strbuf_addf(&buf
, ":%s", ref
->name
);
1125 string_list_append(&revlist_args
, "--refspec");
1126 string_list_append(&revlist_args
, buf
.buf
);
1127 strbuf_release(&buf
);
1130 string_list_append(&revlist_args
, ref
->peer_ref
->name
);
1134 if (get_exporter(transport
, &exporter
, &revlist_args
))
1135 die(_("couldn't run fast-export"));
1137 string_list_clear(&revlist_args
, 1);
1139 if (finish_command(&exporter
))
1140 die(_("error while running fast-export"));
1141 if (push_update_refs_status(data
, remote_refs
, flags
))
1144 if (data
->export_marks
) {
1145 strbuf_addf(&buf
, "%s.tmp", data
->export_marks
);
1146 rename(buf
.buf
, data
->export_marks
);
1147 strbuf_release(&buf
);
1153 static int push_refs(struct transport
*transport
,
1154 struct ref
*remote_refs
, int flags
)
1156 struct helper_data
*data
= transport
->data
;
1158 if (process_connect(transport
, 1))
1159 return transport
->vtable
->push_refs(transport
, remote_refs
, flags
);
1163 _("No refs in common and none specified; doing nothing.\n"
1164 "Perhaps you should specify a branch.\n"));
1169 return push_refs_with_push(transport
, remote_refs
, flags
);
1172 return push_refs_with_export(transport
, remote_refs
, flags
);
1178 static int has_attribute(const char *attrs
, const char *attr
)
1186 const char *space
= strchrnul(attrs
, ' ');
1187 if (len
== space
- attrs
&& !strncmp(attrs
, attr
, len
))
1195 static struct ref
*get_refs_list(struct transport
*transport
, int for_push
,
1196 struct transport_ls_refs_options
*transport_options
)
1198 get_helper(transport
);
1200 if (process_connect(transport
, for_push
))
1201 return transport
->vtable
->get_refs_list(transport
, for_push
,
1204 return get_refs_list_using_list(transport
, for_push
);
1207 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
1210 struct helper_data
*data
= transport
->data
;
1211 struct child_process
*helper
;
1212 struct ref
*ret
= NULL
;
1213 struct ref
**tail
= &ret
;
1215 struct strbuf buf
= STRBUF_INIT
;
1217 data
->get_refs_list_called
= 1;
1218 helper
= get_helper(transport
);
1220 if (data
->object_format
)
1221 set_helper_option(transport
, "object-format", "true");
1223 if (data
->push
&& for_push
)
1224 write_constant(helper
->in
, "list for-push\n");
1226 write_constant(helper
->in
, "list\n");
1230 if (recvline(data
, &buf
))
1235 else if (buf
.buf
[0] == ':') {
1237 if (skip_prefix(buf
.buf
, ":object-format ", &value
)) {
1238 int algo
= hash_algo_by_name(value
);
1239 if (algo
== GIT_HASH_UNKNOWN
)
1240 die(_("unsupported object format '%s'"),
1242 transport
->hash_algo
= &hash_algos
[algo
];
1247 eov
= strchr(buf
.buf
, ' ');
1249 die(_("malformed response in ref list: %s"), buf
.buf
);
1250 eon
= strchr(eov
+ 1, ' ');
1254 *tail
= alloc_ref(eov
+ 1);
1255 if (buf
.buf
[0] == '@')
1256 (*tail
)->symref
= xstrdup(buf
.buf
+ 1);
1257 else if (buf
.buf
[0] != '?')
1258 get_oid_hex_algop(buf
.buf
, &(*tail
)->old_oid
, transport
->hash_algo
);
1260 if (has_attribute(eon
+ 1, "unchanged")) {
1261 (*tail
)->status
|= REF_STATUS_UPTODATE
;
1262 if (refs_read_ref(get_main_ref_store(the_repository
), (*tail
)->name
, &(*tail
)->old_oid
) < 0)
1263 die(_("could not read ref %s"),
1267 tail
= &((*tail
)->next
);
1270 fprintf(stderr
, "Debug: Read ref listing.\n");
1271 strbuf_release(&buf
);
1273 for (posn
= ret
; posn
; posn
= posn
->next
)
1274 resolve_remote_symref(posn
, ret
);
1279 static int get_bundle_uri(struct transport
*transport
)
1281 get_helper(transport
);
1283 if (process_connect(transport
, 0))
1284 return transport
->vtable
->get_bundle_uri(transport
);
1289 static struct transport_vtable vtable
= {
1290 .set_option
= set_helper_option
,
1291 .get_refs_list
= get_refs_list
,
1292 .get_bundle_uri
= get_bundle_uri
,
1293 .fetch_refs
= fetch_refs
,
1294 .push_refs
= push_refs
,
1295 .connect
= connect_helper
,
1296 .disconnect
= release_helper
1299 int transport_helper_init(struct transport
*transport
, const char *name
)
1301 struct helper_data
*data
= xcalloc(1, sizeof(*data
));
1302 data
->name
= xstrdup(name
);
1304 transport_check_allowed(name
);
1306 if (getenv("GIT_TRANSPORT_HELPER_DEBUG"))
1309 list_objects_filter_init(&data
->transport_options
.filter_options
);
1311 transport
->data
= data
;
1312 transport
->vtable
= &vtable
;
1313 transport
->smart_options
= &(data
->transport_options
);
1318 * Linux pipes can buffer 65536 bytes at once (and most platforms can
1319 * buffer less), so attempt reads and writes with up to that size.
1321 #define BUFFERSIZE 65536
1322 /* This should be enough to hold debugging message. */
1323 #define PBUFFERSIZE 8192
1325 /* Print bidirectional transfer loop debug message. */
1326 __attribute__((format (printf
, 1, 2)))
1327 static void transfer_debug(const char *fmt
, ...)
1330 * NEEDSWORK: This function is sometimes used from multiple threads, and
1331 * we end up using debug_enabled racily. That "should not matter" since
1332 * we always write the same value, but it's still wrong. This function
1333 * is listed in .tsan-suppressions for the time being.
1337 char msgbuf
[PBUFFERSIZE
];
1338 static int debug_enabled
= -1;
1340 if (debug_enabled
< 0)
1341 debug_enabled
= getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0;
1345 va_start(args
, fmt
);
1346 vsnprintf(msgbuf
, PBUFFERSIZE
, fmt
, args
);
1348 fprintf(stderr
, "Transfer loop debugging: %s\n", msgbuf
);
1351 /* Stream state: More data may be coming in this direction. */
1352 #define SSTATE_TRANSFERRING 0
1354 * Stream state: No more data coming in this direction, flushing rest of
1357 #define SSTATE_FLUSHING 1
1358 /* Stream state: Transfer in this direction finished. */
1359 #define SSTATE_FINISHED 2
1361 #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING)
1362 #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING)
1363 #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING)
1365 /* Unidirectional transfer. */
1366 struct unidirectional_transfer
{
1371 /* Is source socket? */
1373 /* Is destination socket? */
1375 /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */
1378 char buf
[BUFFERSIZE
];
1381 /* Name of source. */
1382 const char *src_name
;
1383 /* Name of destination. */
1384 const char *dest_name
;
1387 /* Closes the target (for writing) if transfer has finished. */
1388 static void udt_close_if_finished(struct unidirectional_transfer
*t
)
1390 if (STATE_NEEDS_CLOSING(t
->state
) && !t
->bufuse
) {
1391 t
->state
= SSTATE_FINISHED
;
1392 if (t
->dest_is_sock
)
1393 shutdown(t
->dest
, SHUT_WR
);
1396 transfer_debug("Closed %s.", t
->dest_name
);
1401 * Tries to read data from source into buffer. If buffer is full,
1402 * no data is read. Returns 0 on success, -1 on error.
1404 static int udt_do_read(struct unidirectional_transfer
*t
)
1408 if (t
->bufuse
== BUFFERSIZE
)
1409 return 0; /* No space for more. */
1411 transfer_debug("%s is readable", t
->src_name
);
1412 bytes
= xread(t
->src
, t
->buf
+ t
->bufuse
, BUFFERSIZE
- t
->bufuse
);
1414 error_errno(_("read(%s) failed"), t
->src_name
);
1416 } else if (bytes
== 0) {
1417 transfer_debug("%s EOF (with %i bytes in buffer)",
1418 t
->src_name
, (int)t
->bufuse
);
1419 t
->state
= SSTATE_FLUSHING
;
1420 } else if (bytes
> 0) {
1422 transfer_debug("Read %i bytes from %s (buffer now at %i)",
1423 (int)bytes
, t
->src_name
, (int)t
->bufuse
);
1428 /* Tries to write data from buffer into destination. If buffer is empty,
1429 * no data is written. Returns 0 on success, -1 on error.
1431 static int udt_do_write(struct unidirectional_transfer
*t
)
1436 return 0; /* Nothing to write. */
1438 transfer_debug("%s is writable", t
->dest_name
);
1439 bytes
= xwrite(t
->dest
, t
->buf
, t
->bufuse
);
1441 error_errno(_("write(%s) failed"), t
->dest_name
);
1443 } else if (bytes
> 0) {
1446 memmove(t
->buf
, t
->buf
+ bytes
, t
->bufuse
);
1447 transfer_debug("Wrote %i bytes to %s (buffer now at %i)",
1448 (int)bytes
, t
->dest_name
, (int)t
->bufuse
);
1454 /* State of bidirectional transfer loop. */
1455 struct bidirectional_transfer_state
{
1456 /* Direction from program to git. */
1457 struct unidirectional_transfer ptg
;
1458 /* Direction from git to program. */
1459 struct unidirectional_transfer gtp
;
1462 static void *udt_copy_task_routine(void *udt
)
1464 struct unidirectional_transfer
*t
= (struct unidirectional_transfer
*)udt
;
1465 while (t
->state
!= SSTATE_FINISHED
) {
1466 if (STATE_NEEDS_READING(t
->state
))
1469 if (STATE_NEEDS_WRITING(t
->state
))
1470 if (udt_do_write(t
))
1472 if (STATE_NEEDS_CLOSING(t
->state
))
1473 udt_close_if_finished(t
);
1475 return udt
; /* Just some non-NULL value. */
1481 * Join thread, with appropriate errors on failure. Name is name for the
1482 * thread (for error messages). Returns 0 on success, 1 on failure.
1484 static int tloop_join(pthread_t thread
, const char *name
)
1488 err
= pthread_join(thread
, &tret
);
1490 error(_("%s thread failed"), name
);
1494 error(_("%s thread failed to join: %s"), name
, strerror(err
));
1501 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1504 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1506 pthread_t gtp_thread
;
1507 pthread_t ptg_thread
;
1510 err
= pthread_create(>p_thread
, NULL
, udt_copy_task_routine
,
1513 die(_("can't start thread for copying data: %s"), strerror(err
));
1514 err
= pthread_create(&ptg_thread
, NULL
, udt_copy_task_routine
,
1517 die(_("can't start thread for copying data: %s"), strerror(err
));
1519 ret
|= tloop_join(gtp_thread
, "Git to program copy");
1520 ret
|= tloop_join(ptg_thread
, "Program to git copy");
1525 /* Close the source and target (for writing) for transfer. */
1526 static void udt_kill_transfer(struct unidirectional_transfer
*t
)
1528 t
->state
= SSTATE_FINISHED
;
1530 * Socket read end left open isn't a disaster if nobody
1531 * attempts to read from it (mingw compat headers do not
1534 * We can't fully close the socket since otherwise gtp
1535 * task would first close the socket it sends data to
1536 * while closing the ptg file descriptors.
1538 if (!t
->src_is_sock
)
1540 if (t
->dest_is_sock
)
1541 shutdown(t
->dest
, SHUT_WR
);
1547 * Join process, with appropriate errors on failure. Name is name for the
1548 * process (for error messages). Returns 0 on success, 1 on failure.
1550 static int tloop_join(pid_t pid
, const char *name
)
1553 if (waitpid(pid
, &tret
, 0) < 0) {
1554 error_errno(_("%s process failed to wait"), name
);
1557 if (!WIFEXITED(tret
) || WEXITSTATUS(tret
)) {
1558 error(_("%s process failed"), name
);
1565 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1568 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1573 /* Fork thread #1: git to program. */
1576 die_errno(_("can't start thread for copying data"));
1577 else if (pid1
== 0) {
1578 udt_kill_transfer(&s
->ptg
);
1579 exit(udt_copy_task_routine(&s
->gtp
) ? 0 : 1);
1582 /* Fork thread #2: program to git. */
1585 die_errno(_("can't start thread for copying data"));
1586 else if (pid2
== 0) {
1587 udt_kill_transfer(&s
->gtp
);
1588 exit(udt_copy_task_routine(&s
->ptg
) ? 0 : 1);
1592 * Close both streams in parent as to not interfere with
1593 * end of file detection and wait for both tasks to finish.
1595 udt_kill_transfer(&s
->gtp
);
1596 udt_kill_transfer(&s
->ptg
);
1597 ret
|= tloop_join(pid1
, "Git to program copy");
1598 ret
|= tloop_join(pid2
, "Program to git copy");
1604 * Copies data from stdin to output and from input to stdout simultaneously.
1605 * Additionally filtering through given filter. If filter is NULL, uses
1608 int bidirectional_transfer_loop(int input
, int output
)
1610 struct bidirectional_transfer_state state
;
1612 /* Fill the state fields. */
1613 state
.ptg
.src
= input
;
1615 state
.ptg
.src_is_sock
= (input
== output
);
1616 state
.ptg
.dest_is_sock
= 0;
1617 state
.ptg
.state
= SSTATE_TRANSFERRING
;
1618 state
.ptg
.bufuse
= 0;
1619 state
.ptg
.src_name
= "remote input";
1620 state
.ptg
.dest_name
= "stdout";
1623 state
.gtp
.dest
= output
;
1624 state
.gtp
.src_is_sock
= 0;
1625 state
.gtp
.dest_is_sock
= (input
== output
);
1626 state
.gtp
.state
= SSTATE_TRANSFERRING
;
1627 state
.gtp
.bufuse
= 0;
1628 state
.gtp
.src_name
= "stdin";
1629 state
.gtp
.dest_name
= "remote output";
1631 return tloop_spawnwait_tasks(&state
);
1634 void reject_atomic_push(struct ref
*remote_refs
, int mirror_mode
)
1638 /* Mark other refs as failed */
1639 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1640 if (!ref
->peer_ref
&& !mirror_mode
)
1643 switch (ref
->status
) {
1644 case REF_STATUS_NONE
:
1646 case REF_STATUS_EXPECTING_REPORT
:
1647 ref
->status
= REF_STATUS_ATOMIC_PUSH_FAILED
;
1650 break; /* do nothing */