4 #include "run-command.h"
9 #include "string-list.h"
10 #include "thread-utils.h"
12 #include "argv-array.h"
15 #include "transport-internal.h"
22 struct child_process
*helper
;
31 stateless_connect
: 1,
33 check_connectivity
: 1,
34 no_disconnect_req
: 1,
35 no_private_update
: 1;
38 * As an optimization, the transport code may invoke fetch before
39 * get_refs_list. If this happens, and if the transport helper doesn't
40 * support connect or stateless_connect, we need to invoke
41 * get_refs_list ourselves if we haven't already done so. Keep track of
42 * whether we have invoked get_refs_list.
44 unsigned get_refs_list_called
: 1;
48 /* These go from remote name (as in "list") to private name */
50 /* Transport options for fetch-pack/send-pack (should one of
53 struct git_transport_options transport_options
;
56 static void sendline(struct helper_data
*helper
, struct strbuf
*buffer
)
59 fprintf(stderr
, "Debug: Remote helper: -> %s", buffer
->buf
);
60 if (write_in_full(helper
->helper
->in
, buffer
->buf
, buffer
->len
) < 0)
61 die_errno(_("full write to remote helper failed"));
64 static int recvline_fh(FILE *helper
, struct strbuf
*buffer
)
68 fprintf(stderr
, "Debug: Remote helper: Waiting...\n");
69 if (strbuf_getline(buffer
, helper
) == EOF
) {
71 fprintf(stderr
, "Debug: Remote helper quit.\n");
76 fprintf(stderr
, "Debug: Remote helper: <- %s\n", buffer
->buf
);
80 static int recvline(struct helper_data
*helper
, struct strbuf
*buffer
)
82 return recvline_fh(helper
->out
, buffer
);
85 static void write_constant(int fd
, const char *str
)
88 fprintf(stderr
, "Debug: Remote helper: -> %s", str
);
89 if (write_in_full(fd
, str
, strlen(str
)) < 0)
90 die_errno(_("full write to remote helper failed"));
93 static const char *remove_ext_force(const char *url
)
96 const char *colon
= strchr(url
, ':');
97 if (colon
&& colon
[1] == ':')
103 static void do_take_over(struct transport
*transport
)
105 struct helper_data
*data
;
106 data
= (struct helper_data
*)transport
->data
;
107 transport_take_over(transport
, data
->helper
);
112 static void standard_options(struct transport
*t
);
114 static struct child_process
*get_helper(struct transport
*transport
)
116 struct helper_data
*data
= transport
->data
;
117 struct strbuf buf
= STRBUF_INIT
;
118 struct child_process
*helper
;
125 helper
= xmalloc(sizeof(*helper
));
126 child_process_init(helper
);
130 argv_array_pushf(&helper
->args
, "git-remote-%s", data
->name
);
131 argv_array_push(&helper
->args
, transport
->remote
->name
);
132 argv_array_push(&helper
->args
, remove_ext_force(transport
->url
));
134 helper
->silent_exec_failure
= 1;
137 argv_array_pushf(&helper
->env_array
, "%s=%s",
138 GIT_DIR_ENVIRONMENT
, get_git_dir());
140 helper
->trace2_child_class
= helper
->args
.argv
[0]; /* "remote-<name>" */
142 code
= start_command(helper
);
143 if (code
< 0 && errno
== ENOENT
)
144 die(_("unable to find remote helper for '%s'"), data
->name
);
148 data
->helper
= helper
;
149 data
->no_disconnect_req
= 0;
150 refspec_init(&data
->rs
, REFSPEC_FETCH
);
153 * Open the output as FILE* so strbuf_getline_*() family of
154 * functions can be used.
155 * Do this with duped fd because fclose() will close the fd,
156 * and stuff like taking over will require the fd to remain.
158 duped
= dup(helper
->out
);
160 die_errno(_("can't dup helper output fd"));
161 data
->out
= xfdopen(duped
, "r");
163 write_constant(helper
->in
, "capabilities\n");
166 const char *capname
, *arg
;
168 if (recvline(data
, &buf
))
174 if (*buf
.buf
== '*') {
175 capname
= buf
.buf
+ 1;
181 fprintf(stderr
, "Debug: Got cap %s\n", capname
);
182 if (!strcmp(capname
, "fetch"))
184 else if (!strcmp(capname
, "option"))
186 else if (!strcmp(capname
, "push"))
188 else if (!strcmp(capname
, "import"))
190 else if (!strcmp(capname
, "bidi-import"))
191 data
->bidi_import
= 1;
192 else if (!strcmp(capname
, "export"))
194 else if (!strcmp(capname
, "check-connectivity"))
195 data
->check_connectivity
= 1;
196 else if (skip_prefix(capname
, "refspec ", &arg
)) {
197 refspec_append(&data
->rs
, arg
);
198 } else if (!strcmp(capname
, "connect")) {
200 } else if (!strcmp(capname
, "stateless-connect")) {
201 data
->stateless_connect
= 1;
202 } else if (!strcmp(capname
, "signed-tags")) {
203 data
->signed_tags
= 1;
204 } else if (skip_prefix(capname
, "export-marks ", &arg
)) {
205 data
->export_marks
= xstrdup(arg
);
206 } else if (skip_prefix(capname
, "import-marks ", &arg
)) {
207 data
->import_marks
= xstrdup(arg
);
208 } else if (starts_with(capname
, "no-private-update")) {
209 data
->no_private_update
= 1;
210 } else if (mandatory
) {
211 die(_("unknown mandatory capability %s; this remote "
212 "helper probably needs newer version of Git"),
216 if (!data
->rs
.nr
&& (data
->import
|| data
->bidi_import
|| data
->export
)) {
217 warning(_("this remote helper should implement refspec capability"));
219 strbuf_release(&buf
);
221 fprintf(stderr
, "Debug: Capabilities complete.\n");
222 standard_options(transport
);
226 static int disconnect_helper(struct transport
*transport
)
228 struct helper_data
*data
= transport
->data
;
233 fprintf(stderr
, "Debug: Disconnecting.\n");
234 if (!data
->no_disconnect_req
) {
236 * Ignore write errors; there's nothing we can do,
237 * since we're about to close the pipe anyway. And the
238 * most likely error is EPIPE due to the helper dying
239 * to report an error itself.
241 sigchain_push(SIGPIPE
, SIG_IGN
);
242 xwrite(data
->helper
->in
, "\n", 1);
243 sigchain_pop(SIGPIPE
);
245 close(data
->helper
->in
);
246 close(data
->helper
->out
);
248 res
= finish_command(data
->helper
);
249 FREE_AND_NULL(data
->helper
);
254 static const char *unsupported_options
[] = {
255 TRANS_OPT_UPLOADPACK
,
256 TRANS_OPT_RECEIVEPACK
,
261 static const char *boolean_options
[] = {
264 TRANS_OPT_FOLLOWTAGS
,
265 TRANS_OPT_DEEPEN_RELATIVE
268 static int strbuf_set_helper_option(struct helper_data
*data
,
274 if (recvline(data
, buf
))
277 if (!strcmp(buf
->buf
, "ok"))
279 else if (starts_with(buf
->buf
, "error"))
281 else if (!strcmp(buf
->buf
, "unsupported"))
284 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
->buf
);
290 static int string_list_set_helper_option(struct helper_data
*data
,
292 struct string_list
*list
)
294 struct strbuf buf
= STRBUF_INIT
;
297 for (i
= 0; i
< list
->nr
; i
++) {
298 strbuf_addf(&buf
, "option %s ", name
);
299 quote_c_style(list
->items
[i
].string
, &buf
, NULL
, 0);
300 strbuf_addch(&buf
, '\n');
302 if ((ret
= strbuf_set_helper_option(data
, &buf
)))
306 strbuf_release(&buf
);
310 static int set_helper_option(struct transport
*transport
,
311 const char *name
, const char *value
)
313 struct helper_data
*data
= transport
->data
;
314 struct strbuf buf
= STRBUF_INIT
;
315 int i
, ret
, is_bool
= 0;
317 get_helper(transport
);
322 if (!strcmp(name
, "deepen-not"))
323 return string_list_set_helper_option(data
, name
,
324 (struct string_list
*)value
);
326 for (i
= 0; i
< ARRAY_SIZE(unsupported_options
); i
++) {
327 if (!strcmp(name
, unsupported_options
[i
]))
331 for (i
= 0; i
< ARRAY_SIZE(boolean_options
); i
++) {
332 if (!strcmp(name
, boolean_options
[i
])) {
338 strbuf_addf(&buf
, "option %s ", name
);
340 strbuf_addstr(&buf
, value
? "true" : "false");
342 quote_c_style(value
, &buf
, NULL
, 0);
343 strbuf_addch(&buf
, '\n');
345 ret
= strbuf_set_helper_option(data
, &buf
);
346 strbuf_release(&buf
);
350 static void standard_options(struct transport
*t
)
355 set_helper_option(t
, "progress", t
->progress
? "true" : "false");
357 xsnprintf(buf
, sizeof(buf
), "%d", v
+ 1);
358 set_helper_option(t
, "verbosity", buf
);
361 case TRANSPORT_FAMILY_ALL
:
363 * this is already the default,
364 * do not break old remote helpers by setting "all" here
367 case TRANSPORT_FAMILY_IPV4
:
368 set_helper_option(t
, "family", "ipv4");
370 case TRANSPORT_FAMILY_IPV6
:
371 set_helper_option(t
, "family", "ipv6");
376 static int release_helper(struct transport
*transport
)
379 struct helper_data
*data
= transport
->data
;
380 refspec_clear(&data
->rs
);
381 res
= disconnect_helper(transport
);
382 free(transport
->data
);
386 static int fetch_with_fetch(struct transport
*transport
,
387 int nr_heads
, struct ref
**to_fetch
)
389 struct helper_data
*data
= transport
->data
;
391 struct strbuf buf
= STRBUF_INIT
;
393 for (i
= 0; i
< nr_heads
; i
++) {
394 const struct ref
*posn
= to_fetch
[i
];
395 if (posn
->status
& REF_STATUS_UPTODATE
)
398 strbuf_addf(&buf
, "fetch %s %s\n",
399 oid_to_hex(&posn
->old_oid
),
400 posn
->symref
? posn
->symref
: posn
->name
);
403 strbuf_addch(&buf
, '\n');
404 sendline(data
, &buf
);
409 if (recvline(data
, &buf
))
412 if (skip_prefix(buf
.buf
, "lock ", &name
)) {
413 if (transport
->pack_lockfiles
.nr
)
414 warning(_("%s also locked %s"), data
->name
, name
);
416 string_list_append(&transport
->pack_lockfiles
,
419 else if (data
->check_connectivity
&&
420 data
->transport_options
.check_self_contained_and_connected
&&
421 !strcmp(buf
.buf
, "connectivity-ok"))
422 data
->transport_options
.self_contained_and_connected
= 1;
426 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
.buf
);
428 strbuf_release(&buf
);
432 static int get_importer(struct transport
*transport
, struct child_process
*fastimport
)
434 struct child_process
*helper
= get_helper(transport
);
435 struct helper_data
*data
= transport
->data
;
436 int cat_blob_fd
, code
;
437 child_process_init(fastimport
);
438 fastimport
->in
= xdup(helper
->out
);
439 argv_array_push(&fastimport
->args
, "fast-import");
440 argv_array_push(&fastimport
->args
, "--allow-unsafe-features");
441 argv_array_push(&fastimport
->args
, debug
? "--stats" : "--quiet");
443 if (data
->bidi_import
) {
444 cat_blob_fd
= xdup(helper
->in
);
445 argv_array_pushf(&fastimport
->args
, "--cat-blob-fd=%d", cat_blob_fd
);
447 fastimport
->git_cmd
= 1;
449 code
= start_command(fastimport
);
453 static int get_exporter(struct transport
*transport
,
454 struct child_process
*fastexport
,
455 struct string_list
*revlist_args
)
457 struct helper_data
*data
= transport
->data
;
458 struct child_process
*helper
= get_helper(transport
);
461 child_process_init(fastexport
);
463 /* we need to duplicate helper->in because we want to use it after
464 * fastexport is done with it. */
465 fastexport
->out
= dup(helper
->in
);
466 argv_array_push(&fastexport
->args
, "fast-export");
467 argv_array_push(&fastexport
->args
, "--use-done-feature");
468 argv_array_push(&fastexport
->args
, data
->signed_tags
?
469 "--signed-tags=verbatim" : "--signed-tags=warn-strip");
470 if (data
->export_marks
)
471 argv_array_pushf(&fastexport
->args
, "--export-marks=%s.tmp", data
->export_marks
);
472 if (data
->import_marks
)
473 argv_array_pushf(&fastexport
->args
, "--import-marks=%s", data
->import_marks
);
475 for (i
= 0; i
< revlist_args
->nr
; i
++)
476 argv_array_push(&fastexport
->args
, revlist_args
->items
[i
].string
);
478 fastexport
->git_cmd
= 1;
479 return start_command(fastexport
);
482 static int fetch_with_import(struct transport
*transport
,
483 int nr_heads
, struct ref
**to_fetch
)
485 struct child_process fastimport
;
486 struct helper_data
*data
= transport
->data
;
489 struct strbuf buf
= STRBUF_INIT
;
491 get_helper(transport
);
493 if (get_importer(transport
, &fastimport
))
494 die(_("couldn't run fast-import"));
496 for (i
= 0; i
< nr_heads
; i
++) {
498 if (posn
->status
& REF_STATUS_UPTODATE
)
501 strbuf_addf(&buf
, "import %s\n",
502 posn
->symref
? posn
->symref
: posn
->name
);
503 sendline(data
, &buf
);
507 write_constant(data
->helper
->in
, "\n");
509 * remote-helpers that advertise the bidi-import capability are required to
510 * buffer the complete batch of import commands until this newline before
511 * sending data to fast-import.
512 * These helpers read back data from fast-import on their stdin, which could
513 * be mixed with import commands, otherwise.
516 if (finish_command(&fastimport
))
517 die(_("error while running fast-import"));
520 * The fast-import stream of a remote helper that advertises
521 * the "refspec" capability writes to the refs named after the
522 * right hand side of the first refspec matching each ref we
525 * (If no "refspec" capability was specified, for historical
526 * reasons we default to the equivalent of *:*.)
528 * Store the result in to_fetch[i].old_sha1. Callers such
529 * as "git fetch" can use the value to write feedback to the
530 * terminal, populate FETCH_HEAD, and determine what new value
531 * should be written to peer_ref if the update is a
532 * fast-forward or this is a forced update.
534 for (i
= 0; i
< nr_heads
; i
++) {
535 char *private, *name
;
537 if (posn
->status
& REF_STATUS_UPTODATE
)
539 name
= posn
->symref
? posn
->symref
: posn
->name
;
541 private = apply_refspecs(&data
->rs
, name
);
543 private = xstrdup(name
);
545 if (read_ref(private, &posn
->old_oid
) < 0)
546 die(_("could not read ref %s"), private);
550 strbuf_release(&buf
);
554 static int run_connect(struct transport
*transport
, struct strbuf
*cmdbuf
)
556 struct helper_data
*data
= transport
->data
;
560 struct child_process
*helper
;
562 helper
= get_helper(transport
);
565 * Yes, dup the pipe another time, as we need unbuffered version
566 * of input pipe as FILE*. fclose() closes the underlying fd and
567 * stream buffering only can be changed before first I/O operation
570 duped
= dup(helper
->out
);
572 die_errno(_("can't dup helper output fd"));
573 input
= xfdopen(duped
, "r");
574 setvbuf(input
, NULL
, _IONBF
, 0);
576 sendline(data
, cmdbuf
);
577 if (recvline_fh(input
, cmdbuf
))
580 if (!strcmp(cmdbuf
->buf
, "")) {
581 data
->no_disconnect_req
= 1;
583 fprintf(stderr
, "Debug: Smart transport connection "
586 } else if (!strcmp(cmdbuf
->buf
, "fallback")) {
588 fprintf(stderr
, "Debug: Falling back to dumb "
591 die(_("unknown response to connect: %s"),
599 static int process_connect_service(struct transport
*transport
,
600 const char *name
, const char *exec
)
602 struct helper_data
*data
= transport
->data
;
603 struct strbuf cmdbuf
= STRBUF_INIT
;
607 * Handle --upload-pack and friends. This is fire and forget...
608 * just warn if it fails.
610 if (strcmp(name
, exec
)) {
611 int r
= set_helper_option(transport
, "servpath", exec
);
613 warning(_("setting remote service path not supported by protocol"));
615 warning(_("invalid remote service path"));
619 strbuf_addf(&cmdbuf
, "connect %s\n", name
);
620 ret
= run_connect(transport
, &cmdbuf
);
621 } else if (data
->stateless_connect
&&
622 (get_protocol_version_config() == protocol_v2
) &&
623 !strcmp("git-upload-pack", name
)) {
624 strbuf_addf(&cmdbuf
, "stateless-connect %s\n", name
);
625 ret
= run_connect(transport
, &cmdbuf
);
627 transport
->stateless_rpc
= 1;
630 strbuf_release(&cmdbuf
);
634 static int process_connect(struct transport
*transport
,
637 struct helper_data
*data
= transport
->data
;
641 name
= for_push
? "git-receive-pack" : "git-upload-pack";
643 exec
= data
->transport_options
.receivepack
;
645 exec
= data
->transport_options
.uploadpack
;
647 return process_connect_service(transport
, name
, exec
);
650 static int connect_helper(struct transport
*transport
, const char *name
,
651 const char *exec
, int fd
[2])
653 struct helper_data
*data
= transport
->data
;
655 /* Get_helper so connect is inited. */
656 get_helper(transport
);
658 die(_("operation not supported by protocol"));
660 if (!process_connect_service(transport
, name
, exec
))
661 die(_("can't connect to subservice %s"), name
);
663 fd
[0] = data
->helper
->out
;
664 fd
[1] = data
->helper
->in
;
668 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
671 static int fetch(struct transport
*transport
,
672 int nr_heads
, struct ref
**to_fetch
)
674 struct helper_data
*data
= transport
->data
;
677 get_helper(transport
);
679 if (process_connect(transport
, 0)) {
680 do_take_over(transport
);
681 return transport
->vtable
->fetch(transport
, nr_heads
, to_fetch
);
684 if (!data
->get_refs_list_called
)
685 get_refs_list_using_list(transport
, 0);
688 for (i
= 0; i
< nr_heads
; i
++)
689 if (!(to_fetch
[i
]->status
& REF_STATUS_UPTODATE
))
695 if (data
->check_connectivity
&&
696 data
->transport_options
.check_self_contained_and_connected
)
697 set_helper_option(transport
, "check-connectivity", "true");
699 if (transport
->cloning
)
700 set_helper_option(transport
, "cloning", "true");
702 if (data
->transport_options
.update_shallow
)
703 set_helper_option(transport
, "update-shallow", "true");
705 if (data
->transport_options
.filter_options
.choice
) {
706 const char *spec
= expand_list_objects_filter_spec(
707 &data
->transport_options
.filter_options
);
708 set_helper_option(transport
, "filter", spec
);
711 if (data
->transport_options
.negotiation_tips
)
712 warning("Ignoring --negotiation-tip because the protocol does not support it.");
715 return fetch_with_fetch(transport
, nr_heads
, to_fetch
);
718 return fetch_with_import(transport
, nr_heads
, to_fetch
);
723 static int push_update_ref_status(struct strbuf
*buf
,
725 struct ref
*remote_refs
)
728 int status
, forced
= 0;
730 if (starts_with(buf
->buf
, "ok ")) {
731 status
= REF_STATUS_OK
;
732 refname
= buf
->buf
+ 3;
733 } else if (starts_with(buf
->buf
, "error ")) {
734 status
= REF_STATUS_REMOTE_REJECT
;
735 refname
= buf
->buf
+ 6;
737 die(_("expected ok/error, helper said '%s'"), buf
->buf
);
739 msg
= strchr(refname
, ' ');
741 struct strbuf msg_buf
= STRBUF_INIT
;
745 if (!unquote_c_style(&msg_buf
, msg
, &end
))
746 msg
= strbuf_detach(&msg_buf
, NULL
);
749 strbuf_release(&msg_buf
);
751 if (!strcmp(msg
, "no match")) {
752 status
= REF_STATUS_NONE
;
755 else if (!strcmp(msg
, "up to date")) {
756 status
= REF_STATUS_UPTODATE
;
759 else if (!strcmp(msg
, "non-fast forward")) {
760 status
= REF_STATUS_REJECT_NONFASTFORWARD
;
763 else if (!strcmp(msg
, "already exists")) {
764 status
= REF_STATUS_REJECT_ALREADY_EXISTS
;
767 else if (!strcmp(msg
, "fetch first")) {
768 status
= REF_STATUS_REJECT_FETCH_FIRST
;
771 else if (!strcmp(msg
, "needs force")) {
772 status
= REF_STATUS_REJECT_NEEDS_FORCE
;
775 else if (!strcmp(msg
, "stale info")) {
776 status
= REF_STATUS_REJECT_STALE
;
779 else if (!strcmp(msg
, "forced update")) {
786 *ref
= find_ref_by_name(*ref
, refname
);
788 *ref
= find_ref_by_name(remote_refs
, refname
);
790 warning(_("helper reported unexpected status of %s"), refname
);
794 if ((*ref
)->status
!= REF_STATUS_NONE
) {
796 * Earlier, the ref was marked not to be pushed, so ignore the ref
797 * status reported by the remote helper if the latter is 'no match'.
799 if (status
== REF_STATUS_NONE
)
803 (*ref
)->status
= status
;
804 (*ref
)->forced_update
|= forced
;
805 (*ref
)->remote_status
= msg
;
806 return !(status
== REF_STATUS_OK
);
809 static int push_update_refs_status(struct helper_data
*data
,
810 struct ref
*remote_refs
,
813 struct strbuf buf
= STRBUF_INIT
;
814 struct ref
*ref
= remote_refs
;
820 if (recvline(data
, &buf
)) {
828 if (push_update_ref_status(&buf
, &ref
, remote_refs
))
831 if (flags
& TRANSPORT_PUSH_DRY_RUN
|| !data
->rs
.nr
|| data
->no_private_update
)
834 /* propagate back the update to the remote namespace */
835 private = apply_refspecs(&data
->rs
, ref
->name
);
838 update_ref("update by helper", private, &ref
->new_oid
, NULL
,
842 strbuf_release(&buf
);
846 static void set_common_push_options(struct transport
*transport
,
847 const char *name
, int flags
)
849 if (flags
& TRANSPORT_PUSH_DRY_RUN
) {
850 if (set_helper_option(transport
, "dry-run", "true") != 0)
851 die(_("helper %s does not support dry-run"), name
);
852 } else if (flags
& TRANSPORT_PUSH_CERT_ALWAYS
) {
853 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "true") != 0)
854 die(_("helper %s does not support --signed"), name
);
855 } else if (flags
& TRANSPORT_PUSH_CERT_IF_ASKED
) {
856 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "if-asked") != 0)
857 die(_("helper %s does not support --signed=if-asked"), name
);
860 if (flags
& TRANSPORT_PUSH_ATOMIC
)
861 if (set_helper_option(transport
, TRANS_OPT_ATOMIC
, "true") != 0)
862 die(_("helper %s does not support --atomic"), name
);
864 if (flags
& TRANSPORT_PUSH_OPTIONS
) {
865 struct string_list_item
*item
;
866 for_each_string_list_item(item
, transport
->push_options
)
867 if (set_helper_option(transport
, "push-option", item
->string
) != 0)
868 die(_("helper %s does not support 'push-option'"), name
);
872 static int push_refs_with_push(struct transport
*transport
,
873 struct ref
*remote_refs
, int flags
)
875 int force_all
= flags
& TRANSPORT_PUSH_FORCE
;
876 int mirror
= flags
& TRANSPORT_PUSH_MIRROR
;
877 int atomic
= flags
& TRANSPORT_PUSH_ATOMIC
;
878 struct helper_data
*data
= transport
->data
;
879 struct strbuf buf
= STRBUF_INIT
;
881 struct string_list cas_options
= STRING_LIST_INIT_DUP
;
882 struct string_list_item
*cas_option
;
884 get_helper(transport
);
888 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
889 if (!ref
->peer_ref
&& !mirror
)
892 /* Check for statuses set by set_ref_status_for_push() */
893 switch (ref
->status
) {
894 case REF_STATUS_REJECT_NONFASTFORWARD
:
895 case REF_STATUS_REJECT_STALE
:
896 case REF_STATUS_REJECT_ALREADY_EXISTS
:
898 reject_atomic_push(remote_refs
, mirror
);
899 string_list_clear(&cas_options
, 0);
903 case REF_STATUS_UPTODATE
:
912 strbuf_addstr(&buf
, "push ");
913 if (!ref
->deletion
) {
915 strbuf_addch(&buf
, '+');
917 strbuf_addstr(&buf
, ref
->peer_ref
->name
);
919 strbuf_addstr(&buf
, oid_to_hex(&ref
->new_oid
));
921 strbuf_addch(&buf
, ':');
922 strbuf_addstr(&buf
, ref
->name
);
923 strbuf_addch(&buf
, '\n');
926 * The "--force-with-lease" options without explicit
927 * values to expect have already been expanded into
928 * the ref->old_oid_expect[] field; we can ignore
929 * transport->smart_options->cas altogether and instead
930 * can enumerate them from the refs.
932 if (ref
->expect_old_sha1
) {
933 struct strbuf cas
= STRBUF_INIT
;
934 strbuf_addf(&cas
, "%s:%s",
935 ref
->name
, oid_to_hex(&ref
->old_oid_expect
));
936 string_list_append_nodup(&cas_options
,
937 strbuf_detach(&cas
, NULL
));
941 string_list_clear(&cas_options
, 0);
945 for_each_string_list_item(cas_option
, &cas_options
)
946 set_helper_option(transport
, "cas", cas_option
->string
);
947 set_common_push_options(transport
, data
->name
, flags
);
949 strbuf_addch(&buf
, '\n');
950 sendline(data
, &buf
);
951 strbuf_release(&buf
);
952 string_list_clear(&cas_options
, 0);
954 return push_update_refs_status(data
, remote_refs
, flags
);
957 static int push_refs_with_export(struct transport
*transport
,
958 struct ref
*remote_refs
, int flags
)
961 struct child_process
*helper
, exporter
;
962 struct helper_data
*data
= transport
->data
;
963 struct string_list revlist_args
= STRING_LIST_INIT_DUP
;
964 struct strbuf buf
= STRBUF_INIT
;
967 die(_("remote-helper doesn't support push; refspec needed"));
969 set_common_push_options(transport
, data
->name
, flags
);
970 if (flags
& TRANSPORT_PUSH_FORCE
) {
971 if (set_helper_option(transport
, "force", "true") != 0)
972 warning(_("helper %s does not support 'force'"), data
->name
);
975 helper
= get_helper(transport
);
977 write_constant(helper
->in
, "export\n");
979 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
981 struct object_id oid
;
983 private = apply_refspecs(&data
->rs
, ref
->name
);
984 if (private && !get_oid(private, &oid
)) {
985 strbuf_addf(&buf
, "^%s", private);
986 string_list_append_nodup(&revlist_args
,
987 strbuf_detach(&buf
, NULL
));
988 oidcpy(&ref
->old_oid
, &oid
);
993 if (strcmp(ref
->name
, ref
->peer_ref
->name
)) {
994 if (!ref
->deletion
) {
998 /* Follow symbolic refs (mainly for HEAD). */
999 name
= resolve_ref_unsafe(ref
->peer_ref
->name
,
1000 RESOLVE_REF_READING
,
1002 if (!name
|| !(flag
& REF_ISSYMREF
))
1003 name
= ref
->peer_ref
->name
;
1005 strbuf_addf(&buf
, "%s:%s", name
, ref
->name
);
1007 strbuf_addf(&buf
, ":%s", ref
->name
);
1009 string_list_append(&revlist_args
, "--refspec");
1010 string_list_append(&revlist_args
, buf
.buf
);
1011 strbuf_release(&buf
);
1014 string_list_append(&revlist_args
, ref
->peer_ref
->name
);
1018 if (get_exporter(transport
, &exporter
, &revlist_args
))
1019 die(_("couldn't run fast-export"));
1021 string_list_clear(&revlist_args
, 1);
1023 if (finish_command(&exporter
))
1024 die(_("error while running fast-export"));
1025 if (push_update_refs_status(data
, remote_refs
, flags
))
1028 if (data
->export_marks
) {
1029 strbuf_addf(&buf
, "%s.tmp", data
->export_marks
);
1030 rename(buf
.buf
, data
->export_marks
);
1031 strbuf_release(&buf
);
1037 static int push_refs(struct transport
*transport
,
1038 struct ref
*remote_refs
, int flags
)
1040 struct helper_data
*data
= transport
->data
;
1042 if (process_connect(transport
, 1)) {
1043 do_take_over(transport
);
1044 return transport
->vtable
->push_refs(transport
, remote_refs
, flags
);
1049 _("No refs in common and none specified; doing nothing.\n"
1050 "Perhaps you should specify a branch such as 'master'.\n"));
1055 return push_refs_with_push(transport
, remote_refs
, flags
);
1058 return push_refs_with_export(transport
, remote_refs
, flags
);
1064 static int has_attribute(const char *attrs
, const char *attr
)
1072 const char *space
= strchrnul(attrs
, ' ');
1073 if (len
== space
- attrs
&& !strncmp(attrs
, attr
, len
))
1081 static struct ref
*get_refs_list(struct transport
*transport
, int for_push
,
1082 const struct argv_array
*ref_prefixes
)
1084 get_helper(transport
);
1086 if (process_connect(transport
, for_push
)) {
1087 do_take_over(transport
);
1088 return transport
->vtable
->get_refs_list(transport
, for_push
, ref_prefixes
);
1091 return get_refs_list_using_list(transport
, for_push
);
1094 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
1097 struct helper_data
*data
= transport
->data
;
1098 struct child_process
*helper
;
1099 struct ref
*ret
= NULL
;
1100 struct ref
**tail
= &ret
;
1102 struct strbuf buf
= STRBUF_INIT
;
1104 data
->get_refs_list_called
= 1;
1105 helper
= get_helper(transport
);
1107 if (data
->push
&& for_push
)
1108 write_str_in_full(helper
->in
, "list for-push\n");
1110 write_str_in_full(helper
->in
, "list\n");
1114 if (recvline(data
, &buf
))
1120 eov
= strchr(buf
.buf
, ' ');
1122 die(_("malformed response in ref list: %s"), buf
.buf
);
1123 eon
= strchr(eov
+ 1, ' ');
1127 *tail
= alloc_ref(eov
+ 1);
1128 if (buf
.buf
[0] == '@')
1129 (*tail
)->symref
= xstrdup(buf
.buf
+ 1);
1130 else if (buf
.buf
[0] != '?')
1131 get_oid_hex(buf
.buf
, &(*tail
)->old_oid
);
1133 if (has_attribute(eon
+ 1, "unchanged")) {
1134 (*tail
)->status
|= REF_STATUS_UPTODATE
;
1135 if (read_ref((*tail
)->name
, &(*tail
)->old_oid
) < 0)
1136 die(_("could not read ref %s"),
1140 tail
= &((*tail
)->next
);
1143 fprintf(stderr
, "Debug: Read ref listing.\n");
1144 strbuf_release(&buf
);
1146 for (posn
= ret
; posn
; posn
= posn
->next
)
1147 resolve_remote_symref(posn
, ret
);
1152 static struct transport_vtable vtable
= {
1161 int transport_helper_init(struct transport
*transport
, const char *name
)
1163 struct helper_data
*data
= xcalloc(1, sizeof(*data
));
1166 transport_check_allowed(name
);
1168 if (getenv("GIT_TRANSPORT_HELPER_DEBUG"))
1171 transport
->data
= data
;
1172 transport
->vtable
= &vtable
;
1173 transport
->smart_options
= &(data
->transport_options
);
1178 * Linux pipes can buffer 65536 bytes at once (and most platforms can
1179 * buffer less), so attempt reads and writes with up to that size.
1181 #define BUFFERSIZE 65536
1182 /* This should be enough to hold debugging message. */
1183 #define PBUFFERSIZE 8192
1185 /* Print bidirectional transfer loop debug message. */
1186 __attribute__((format (printf
, 1, 2)))
1187 static void transfer_debug(const char *fmt
, ...)
1190 * NEEDSWORK: This function is sometimes used from multiple threads, and
1191 * we end up using debug_enabled racily. That "should not matter" since
1192 * we always write the same value, but it's still wrong. This function
1193 * is listed in .tsan-suppressions for the time being.
1197 char msgbuf
[PBUFFERSIZE
];
1198 static int debug_enabled
= -1;
1200 if (debug_enabled
< 0)
1201 debug_enabled
= getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0;
1205 va_start(args
, fmt
);
1206 vsnprintf(msgbuf
, PBUFFERSIZE
, fmt
, args
);
1208 fprintf(stderr
, "Transfer loop debugging: %s\n", msgbuf
);
1211 /* Stream state: More data may be coming in this direction. */
1212 #define SSTATE_TRANSFERRING 0
1214 * Stream state: No more data coming in this direction, flushing rest of
1217 #define SSTATE_FLUSHING 1
1218 /* Stream state: Transfer in this direction finished. */
1219 #define SSTATE_FINISHED 2
1221 #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING)
1222 #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING)
1223 #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING)
1225 /* Unidirectional transfer. */
1226 struct unidirectional_transfer
{
1231 /* Is source socket? */
1233 /* Is destination socket? */
1235 /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */
1238 char buf
[BUFFERSIZE
];
1241 /* Name of source. */
1242 const char *src_name
;
1243 /* Name of destination. */
1244 const char *dest_name
;
1247 /* Closes the target (for writing) if transfer has finished. */
1248 static void udt_close_if_finished(struct unidirectional_transfer
*t
)
1250 if (STATE_NEEDS_CLOSING(t
->state
) && !t
->bufuse
) {
1251 t
->state
= SSTATE_FINISHED
;
1252 if (t
->dest_is_sock
)
1253 shutdown(t
->dest
, SHUT_WR
);
1256 transfer_debug("Closed %s.", t
->dest_name
);
1261 * Tries to read data from source into buffer. If buffer is full,
1262 * no data is read. Returns 0 on success, -1 on error.
1264 static int udt_do_read(struct unidirectional_transfer
*t
)
1268 if (t
->bufuse
== BUFFERSIZE
)
1269 return 0; /* No space for more. */
1271 transfer_debug("%s is readable", t
->src_name
);
1272 bytes
= xread(t
->src
, t
->buf
+ t
->bufuse
, BUFFERSIZE
- t
->bufuse
);
1274 error_errno(_("read(%s) failed"), t
->src_name
);
1276 } else if (bytes
== 0) {
1277 transfer_debug("%s EOF (with %i bytes in buffer)",
1278 t
->src_name
, (int)t
->bufuse
);
1279 t
->state
= SSTATE_FLUSHING
;
1280 } else if (bytes
> 0) {
1282 transfer_debug("Read %i bytes from %s (buffer now at %i)",
1283 (int)bytes
, t
->src_name
, (int)t
->bufuse
);
1288 /* Tries to write data from buffer into destination. If buffer is empty,
1289 * no data is written. Returns 0 on success, -1 on error.
1291 static int udt_do_write(struct unidirectional_transfer
*t
)
1296 return 0; /* Nothing to write. */
1298 transfer_debug("%s is writable", t
->dest_name
);
1299 bytes
= xwrite(t
->dest
, t
->buf
, t
->bufuse
);
1301 error_errno(_("write(%s) failed"), t
->dest_name
);
1303 } else if (bytes
> 0) {
1306 memmove(t
->buf
, t
->buf
+ bytes
, t
->bufuse
);
1307 transfer_debug("Wrote %i bytes to %s (buffer now at %i)",
1308 (int)bytes
, t
->dest_name
, (int)t
->bufuse
);
1314 /* State of bidirectional transfer loop. */
1315 struct bidirectional_transfer_state
{
1316 /* Direction from program to git. */
1317 struct unidirectional_transfer ptg
;
1318 /* Direction from git to program. */
1319 struct unidirectional_transfer gtp
;
1322 static void *udt_copy_task_routine(void *udt
)
1324 struct unidirectional_transfer
*t
= (struct unidirectional_transfer
*)udt
;
1325 while (t
->state
!= SSTATE_FINISHED
) {
1326 if (STATE_NEEDS_READING(t
->state
))
1329 if (STATE_NEEDS_WRITING(t
->state
))
1330 if (udt_do_write(t
))
1332 if (STATE_NEEDS_CLOSING(t
->state
))
1333 udt_close_if_finished(t
);
1335 return udt
; /* Just some non-NULL value. */
1341 * Join thread, with appropriate errors on failure. Name is name for the
1342 * thread (for error messages). Returns 0 on success, 1 on failure.
1344 static int tloop_join(pthread_t thread
, const char *name
)
1348 err
= pthread_join(thread
, &tret
);
1350 error(_("%s thread failed"), name
);
1354 error(_("%s thread failed to join: %s"), name
, strerror(err
));
1361 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1364 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1366 pthread_t gtp_thread
;
1367 pthread_t ptg_thread
;
1370 err
= pthread_create(>p_thread
, NULL
, udt_copy_task_routine
,
1373 die(_("can't start thread for copying data: %s"), strerror(err
));
1374 err
= pthread_create(&ptg_thread
, NULL
, udt_copy_task_routine
,
1377 die(_("can't start thread for copying data: %s"), strerror(err
));
1379 ret
|= tloop_join(gtp_thread
, "Git to program copy");
1380 ret
|= tloop_join(ptg_thread
, "Program to git copy");
1385 /* Close the source and target (for writing) for transfer. */
1386 static void udt_kill_transfer(struct unidirectional_transfer
*t
)
1388 t
->state
= SSTATE_FINISHED
;
1390 * Socket read end left open isn't a disaster if nobody
1391 * attempts to read from it (mingw compat headers do not
1394 * We can't fully close the socket since otherwise gtp
1395 * task would first close the socket it sends data to
1396 * while closing the ptg file descriptors.
1398 if (!t
->src_is_sock
)
1400 if (t
->dest_is_sock
)
1401 shutdown(t
->dest
, SHUT_WR
);
1407 * Join process, with appropriate errors on failure. Name is name for the
1408 * process (for error messages). Returns 0 on success, 1 on failure.
1410 static int tloop_join(pid_t pid
, const char *name
)
1413 if (waitpid(pid
, &tret
, 0) < 0) {
1414 error_errno(_("%s process failed to wait"), name
);
1417 if (!WIFEXITED(tret
) || WEXITSTATUS(tret
)) {
1418 error(_("%s process failed"), name
);
1425 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1428 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1433 /* Fork thread #1: git to program. */
1436 die_errno(_("can't start thread for copying data"));
1437 else if (pid1
== 0) {
1438 udt_kill_transfer(&s
->ptg
);
1439 exit(udt_copy_task_routine(&s
->gtp
) ? 0 : 1);
1442 /* Fork thread #2: program to git. */
1445 die_errno(_("can't start thread for copying data"));
1446 else if (pid2
== 0) {
1447 udt_kill_transfer(&s
->gtp
);
1448 exit(udt_copy_task_routine(&s
->ptg
) ? 0 : 1);
1452 * Close both streams in parent as to not interfere with
1453 * end of file detection and wait for both tasks to finish.
1455 udt_kill_transfer(&s
->gtp
);
1456 udt_kill_transfer(&s
->ptg
);
1457 ret
|= tloop_join(pid1
, "Git to program copy");
1458 ret
|= tloop_join(pid2
, "Program to git copy");
1464 * Copies data from stdin to output and from input to stdout simultaneously.
1465 * Additionally filtering through given filter. If filter is NULL, uses
1468 int bidirectional_transfer_loop(int input
, int output
)
1470 struct bidirectional_transfer_state state
;
1472 /* Fill the state fields. */
1473 state
.ptg
.src
= input
;
1475 state
.ptg
.src_is_sock
= (input
== output
);
1476 state
.ptg
.dest_is_sock
= 0;
1477 state
.ptg
.state
= SSTATE_TRANSFERRING
;
1478 state
.ptg
.bufuse
= 0;
1479 state
.ptg
.src_name
= "remote input";
1480 state
.ptg
.dest_name
= "stdout";
1483 state
.gtp
.dest
= output
;
1484 state
.gtp
.src_is_sock
= 0;
1485 state
.gtp
.dest_is_sock
= (input
== output
);
1486 state
.gtp
.state
= SSTATE_TRANSFERRING
;
1487 state
.gtp
.bufuse
= 0;
1488 state
.gtp
.src_name
= "stdin";
1489 state
.gtp
.dest_name
= "remote output";
1491 return tloop_spawnwait_tasks(&state
);
1494 void reject_atomic_push(struct ref
*remote_refs
, int mirror_mode
)
1498 /* Mark other refs as failed */
1499 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1500 if (!ref
->peer_ref
&& !mirror_mode
)
1503 switch (ref
->status
) {
1504 case REF_STATUS_NONE
:
1506 case REF_STATUS_EXPECTING_REPORT
:
1507 ref
->status
= REF_STATUS_ATOMIC_PUSH_FAILED
;
1510 break; /* do nothing */