1 #define USE_THE_REPOSITORY_VARIABLE
3 #include "git-compat-util.h"
6 #include "run-command.h"
8 #include "environment.h"
11 #include "object-name.h"
12 #include "repository.h"
14 #include "string-list.h"
15 #include "thread-utils.h"
20 #include "transport-internal.h"
28 struct child_process
*helper
;
37 stateless_connect
: 1,
39 check_connectivity
: 1,
40 no_disconnect_req
: 1,
41 no_private_update
: 1,
45 * As an optimization, the transport code may invoke fetch before
46 * get_refs_list. If this happens, and if the transport helper doesn't
47 * support connect or stateless_connect, we need to invoke
48 * get_refs_list ourselves if we haven't already done so. Keep track of
49 * whether we have invoked get_refs_list.
51 unsigned get_refs_list_called
: 1;
55 /* These go from remote name (as in "list") to private name */
57 /* Transport options for fetch-pack/send-pack (should one of
60 struct git_transport_options transport_options
;
63 static void sendline(struct helper_data
*helper
, struct strbuf
*buffer
)
66 fprintf(stderr
, "Debug: Remote helper: -> %s", buffer
->buf
);
67 if (write_in_full(helper
->helper
->in
, buffer
->buf
, buffer
->len
) < 0)
68 die_errno(_("full write to remote helper failed"));
71 static int recvline_fh(FILE *helper
, struct strbuf
*buffer
)
75 fprintf(stderr
, "Debug: Remote helper: Waiting...\n");
76 if (strbuf_getline(buffer
, helper
) == EOF
) {
78 fprintf(stderr
, "Debug: Remote helper quit.\n");
83 fprintf(stderr
, "Debug: Remote helper: <- %s\n", buffer
->buf
);
87 static int recvline(struct helper_data
*helper
, struct strbuf
*buffer
)
89 return recvline_fh(helper
->out
, buffer
);
92 static int write_constant_gently(int fd
, const char *str
)
95 fprintf(stderr
, "Debug: Remote helper: -> %s", str
);
96 if (write_in_full(fd
, str
, strlen(str
)) < 0)
101 static void write_constant(int fd
, const char *str
)
103 if (write_constant_gently(fd
, str
) < 0)
104 die_errno(_("full write to remote helper failed"));
107 static const char *remove_ext_force(const char *url
)
110 const char *colon
= strchr(url
, ':');
111 if (colon
&& colon
[1] == ':')
117 static void do_take_over(struct transport
*transport
)
119 struct helper_data
*data
;
120 data
= (struct helper_data
*)transport
->data
;
121 transport_take_over(transport
, data
->helper
);
127 static void standard_options(struct transport
*t
);
129 static struct child_process
*get_helper(struct transport
*transport
)
131 struct helper_data
*data
= transport
->data
;
132 struct strbuf buf
= STRBUF_INIT
;
133 struct child_process
*helper
;
140 helper
= xmalloc(sizeof(*helper
));
141 child_process_init(helper
);
145 strvec_pushf(&helper
->args
, "remote-%s", data
->name
);
146 strvec_push(&helper
->args
, transport
->remote
->name
);
147 strvec_push(&helper
->args
, remove_ext_force(transport
->url
));
149 helper
->silent_exec_failure
= 1;
152 strvec_pushf(&helper
->env
, "%s=%s",
153 GIT_DIR_ENVIRONMENT
, repo_get_git_dir(the_repository
));
155 helper
->trace2_child_class
= helper
->args
.v
[0]; /* "remote-<name>" */
157 code
= start_command(helper
);
158 if (code
< 0 && errno
== ENOENT
)
159 die(_("unable to find remote helper for '%s'"), data
->name
);
163 data
->helper
= helper
;
164 data
->no_disconnect_req
= 0;
165 refspec_init(&data
->rs
, REFSPEC_FETCH
);
168 * Open the output as FILE* so strbuf_getline_*() family of
169 * functions can be used.
170 * Do this with duped fd because fclose() will close the fd,
171 * and stuff like taking over will require the fd to remain.
173 duped
= dup(helper
->out
);
175 die_errno(_("can't dup helper output fd"));
176 data
->out
= xfdopen(duped
, "r");
178 sigchain_push(SIGPIPE
, SIG_IGN
);
179 if (write_constant_gently(helper
->in
, "capabilities\n") < 0)
180 die("remote helper '%s' aborted session", data
->name
);
181 sigchain_pop(SIGPIPE
);
184 const char *capname
, *arg
;
186 if (recvline(data
, &buf
))
187 die("remote helper '%s' aborted session", data
->name
);
192 if (*buf
.buf
== '*') {
193 capname
= buf
.buf
+ 1;
199 fprintf(stderr
, "Debug: Got cap %s\n", capname
);
200 if (!strcmp(capname
, "fetch"))
202 else if (!strcmp(capname
, "option"))
204 else if (!strcmp(capname
, "push"))
206 else if (!strcmp(capname
, "import"))
208 else if (!strcmp(capname
, "bidi-import"))
209 data
->bidi_import
= 1;
210 else if (!strcmp(capname
, "export"))
212 else if (!strcmp(capname
, "check-connectivity"))
213 data
->check_connectivity
= 1;
214 else if (skip_prefix(capname
, "refspec ", &arg
)) {
215 refspec_append(&data
->rs
, arg
);
216 } else if (!strcmp(capname
, "connect")) {
218 } else if (!strcmp(capname
, "stateless-connect")) {
219 data
->stateless_connect
= 1;
220 } else if (!strcmp(capname
, "signed-tags")) {
221 data
->signed_tags
= 1;
222 } else if (skip_prefix(capname
, "export-marks ", &arg
)) {
223 data
->export_marks
= xstrdup(arg
);
224 } else if (skip_prefix(capname
, "import-marks ", &arg
)) {
225 data
->import_marks
= xstrdup(arg
);
226 } else if (starts_with(capname
, "no-private-update")) {
227 data
->no_private_update
= 1;
228 } else if (starts_with(capname
, "object-format")) {
229 data
->object_format
= 1;
230 } else if (mandatory
) {
231 die(_("unknown mandatory capability %s; this remote "
232 "helper probably needs newer version of Git"),
236 if (!data
->rs
.nr
&& (data
->import
|| data
->bidi_import
|| data
->export
)) {
237 warning(_("this remote helper should implement refspec capability"));
239 strbuf_release(&buf
);
241 fprintf(stderr
, "Debug: Capabilities complete.\n");
242 standard_options(transport
);
246 static int disconnect_helper(struct transport
*transport
)
248 struct helper_data
*data
= transport
->data
;
253 fprintf(stderr
, "Debug: Disconnecting.\n");
254 if (!data
->no_disconnect_req
) {
256 * Ignore write errors; there's nothing we can do,
257 * since we're about to close the pipe anyway. And the
258 * most likely error is EPIPE due to the helper dying
259 * to report an error itself.
261 sigchain_push(SIGPIPE
, SIG_IGN
);
262 xwrite(data
->helper
->in
, "\n", 1);
263 sigchain_pop(SIGPIPE
);
265 close(data
->helper
->in
);
266 close(data
->helper
->out
);
268 res
= finish_command(data
->helper
);
269 FREE_AND_NULL(data
->name
);
270 FREE_AND_NULL(data
->helper
);
275 static const char *unsupported_options
[] = {
276 TRANS_OPT_UPLOADPACK
,
277 TRANS_OPT_RECEIVEPACK
,
282 static const char *boolean_options
[] = {
285 TRANS_OPT_FOLLOWTAGS
,
286 TRANS_OPT_DEEPEN_RELATIVE
289 static int strbuf_set_helper_option(struct helper_data
*data
,
295 if (recvline(data
, buf
))
298 if (!strcmp(buf
->buf
, "ok"))
300 else if (starts_with(buf
->buf
, "error"))
302 else if (!strcmp(buf
->buf
, "unsupported"))
305 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
->buf
);
311 static int string_list_set_helper_option(struct helper_data
*data
,
313 struct string_list
*list
)
315 struct strbuf buf
= STRBUF_INIT
;
318 for (i
= 0; i
< list
->nr
; i
++) {
319 strbuf_addf(&buf
, "option %s ", name
);
320 quote_c_style(list
->items
[i
].string
, &buf
, NULL
, 0);
321 strbuf_addch(&buf
, '\n');
323 if ((ret
= strbuf_set_helper_option(data
, &buf
)))
327 strbuf_release(&buf
);
331 static int set_helper_option(struct transport
*transport
,
332 const char *name
, const char *value
)
334 struct helper_data
*data
= transport
->data
;
335 struct strbuf buf
= STRBUF_INIT
;
336 int i
, ret
, is_bool
= 0;
338 get_helper(transport
);
343 if (!strcmp(name
, "deepen-not"))
344 return string_list_set_helper_option(data
, name
,
345 (struct string_list
*)value
);
347 for (i
= 0; i
< ARRAY_SIZE(unsupported_options
); i
++) {
348 if (!strcmp(name
, unsupported_options
[i
]))
352 for (i
= 0; i
< ARRAY_SIZE(boolean_options
); i
++) {
353 if (!strcmp(name
, boolean_options
[i
])) {
359 strbuf_addf(&buf
, "option %s ", name
);
361 strbuf_addstr(&buf
, value
? "true" : "false");
363 quote_c_style(value
, &buf
, NULL
, 0);
364 strbuf_addch(&buf
, '\n');
366 ret
= strbuf_set_helper_option(data
, &buf
);
367 strbuf_release(&buf
);
371 static void standard_options(struct transport
*t
)
376 set_helper_option(t
, "progress", t
->progress
? "true" : "false");
378 xsnprintf(buf
, sizeof(buf
), "%d", v
+ 1);
379 set_helper_option(t
, "verbosity", buf
);
382 case TRANSPORT_FAMILY_ALL
:
384 * this is already the default,
385 * do not break old remote helpers by setting "all" here
388 case TRANSPORT_FAMILY_IPV4
:
389 set_helper_option(t
, "family", "ipv4");
391 case TRANSPORT_FAMILY_IPV6
:
392 set_helper_option(t
, "family", "ipv6");
397 static int release_helper(struct transport
*transport
)
400 struct helper_data
*data
= transport
->data
;
401 refspec_clear(&data
->rs
);
402 res
= disconnect_helper(transport
);
403 free(transport
->data
);
407 static int fetch_with_fetch(struct transport
*transport
,
408 int nr_heads
, struct ref
**to_fetch
)
410 struct helper_data
*data
= transport
->data
;
412 struct strbuf buf
= STRBUF_INIT
;
414 for (i
= 0; i
< nr_heads
; i
++) {
415 const struct ref
*posn
= to_fetch
[i
];
416 if (posn
->status
& REF_STATUS_UPTODATE
)
419 strbuf_addf(&buf
, "fetch %s %s\n",
420 oid_to_hex(&posn
->old_oid
),
421 posn
->symref
? posn
->symref
: posn
->name
);
424 strbuf_addch(&buf
, '\n');
425 sendline(data
, &buf
);
430 if (recvline(data
, &buf
))
433 if (skip_prefix(buf
.buf
, "lock ", &name
)) {
434 if (transport
->pack_lockfiles
.nr
)
435 warning(_("%s also locked %s"), data
->name
, name
);
437 string_list_append(&transport
->pack_lockfiles
,
440 else if (data
->check_connectivity
&&
441 data
->transport_options
.check_self_contained_and_connected
&&
442 !strcmp(buf
.buf
, "connectivity-ok"))
443 data
->transport_options
.self_contained_and_connected
= 1;
447 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
.buf
);
449 strbuf_release(&buf
);
451 reprepare_packed_git(the_repository
);
455 static int get_importer(struct transport
*transport
, struct child_process
*fastimport
)
457 struct child_process
*helper
= get_helper(transport
);
458 struct helper_data
*data
= transport
->data
;
459 int cat_blob_fd
, code
;
460 child_process_init(fastimport
);
461 fastimport
->in
= xdup(helper
->out
);
462 strvec_push(&fastimport
->args
, "fast-import");
463 strvec_push(&fastimport
->args
, "--allow-unsafe-features");
464 strvec_push(&fastimport
->args
, debug
? "--stats" : "--quiet");
466 if (data
->bidi_import
) {
467 cat_blob_fd
= xdup(helper
->in
);
468 strvec_pushf(&fastimport
->args
, "--cat-blob-fd=%d", cat_blob_fd
);
470 fastimport
->git_cmd
= 1;
472 code
= start_command(fastimport
);
476 static int get_exporter(struct transport
*transport
,
477 struct child_process
*fastexport
,
478 struct string_list
*revlist_args
)
480 struct helper_data
*data
= transport
->data
;
481 struct child_process
*helper
= get_helper(transport
);
484 child_process_init(fastexport
);
486 /* we need to duplicate helper->in because we want to use it after
487 * fastexport is done with it. */
488 fastexport
->out
= dup(helper
->in
);
489 strvec_push(&fastexport
->args
, "fast-export");
490 strvec_push(&fastexport
->args
, "--use-done-feature");
491 strvec_push(&fastexport
->args
, data
->signed_tags
?
492 "--signed-tags=verbatim" : "--signed-tags=warn-strip");
493 if (data
->export_marks
)
494 strvec_pushf(&fastexport
->args
, "--export-marks=%s.tmp", data
->export_marks
);
495 if (data
->import_marks
)
496 strvec_pushf(&fastexport
->args
, "--import-marks=%s", data
->import_marks
);
498 for (i
= 0; i
< revlist_args
->nr
; i
++)
499 strvec_push(&fastexport
->args
, revlist_args
->items
[i
].string
);
501 fastexport
->git_cmd
= 1;
502 return start_command(fastexport
);
505 static int fetch_with_import(struct transport
*transport
,
506 int nr_heads
, struct ref
**to_fetch
)
508 struct child_process fastimport
;
509 struct helper_data
*data
= transport
->data
;
512 struct strbuf buf
= STRBUF_INIT
;
514 get_helper(transport
);
516 if (get_importer(transport
, &fastimport
))
517 die(_("couldn't run fast-import"));
519 for (i
= 0; i
< nr_heads
; i
++) {
521 if (posn
->status
& REF_STATUS_UPTODATE
)
524 strbuf_addf(&buf
, "import %s\n",
525 posn
->symref
? posn
->symref
: posn
->name
);
526 sendline(data
, &buf
);
530 write_constant(data
->helper
->in
, "\n");
532 * remote-helpers that advertise the bidi-import capability are required to
533 * buffer the complete batch of import commands until this newline before
534 * sending data to fast-import.
535 * These helpers read back data from fast-import on their stdin, which could
536 * be mixed with import commands, otherwise.
539 if (finish_command(&fastimport
))
540 die(_("error while running fast-import"));
543 * The fast-import stream of a remote helper that advertises
544 * the "refspec" capability writes to the refs named after the
545 * right hand side of the first refspec matching each ref we
548 * (If no "refspec" capability was specified, for historical
549 * reasons we default to the equivalent of *:*.)
551 * Store the result in to_fetch[i].old_sha1. Callers such
552 * as "git fetch" can use the value to write feedback to the
553 * terminal, populate FETCH_HEAD, and determine what new value
554 * should be written to peer_ref if the update is a
555 * fast-forward or this is a forced update.
557 for (i
= 0; i
< nr_heads
; i
++) {
558 char *private, *name
;
560 if (posn
->status
& REF_STATUS_UPTODATE
)
562 name
= posn
->symref
? posn
->symref
: posn
->name
;
564 private = apply_refspecs(&data
->rs
, name
);
566 private = xstrdup(name
);
568 if (refs_read_ref(get_main_ref_store(the_repository
), private, &posn
->old_oid
) < 0)
569 die(_("could not read ref %s"), private);
573 strbuf_release(&buf
);
577 static int run_connect(struct transport
*transport
, struct strbuf
*cmdbuf
)
579 struct helper_data
*data
= transport
->data
;
583 struct child_process
*helper
;
585 helper
= get_helper(transport
);
588 * Yes, dup the pipe another time, as we need unbuffered version
589 * of input pipe as FILE*. fclose() closes the underlying fd and
590 * stream buffering only can be changed before first I/O operation
593 duped
= dup(helper
->out
);
595 die_errno(_("can't dup helper output fd"));
596 input
= xfdopen(duped
, "r");
597 setvbuf(input
, NULL
, _IONBF
, 0);
599 sendline(data
, cmdbuf
);
600 if (recvline_fh(input
, cmdbuf
))
603 if (!strcmp(cmdbuf
->buf
, "")) {
604 data
->no_disconnect_req
= 1;
606 fprintf(stderr
, "Debug: Smart transport connection "
609 } else if (!strcmp(cmdbuf
->buf
, "fallback")) {
611 fprintf(stderr
, "Debug: Falling back to dumb "
614 die(_("unknown response to connect: %s"),
622 static int process_connect_service(struct transport
*transport
,
623 const char *name
, const char *exec
)
625 struct helper_data
*data
= transport
->data
;
626 struct strbuf cmdbuf
= STRBUF_INIT
;
630 * Handle --upload-pack and friends. This is fire and forget...
631 * just warn if it fails.
633 if (strcmp(name
, exec
)) {
634 int r
= set_helper_option(transport
, "servpath", exec
);
636 warning(_("setting remote service path not supported by protocol"));
638 warning(_("invalid remote service path"));
642 strbuf_addf(&cmdbuf
, "connect %s\n", name
);
643 ret
= run_connect(transport
, &cmdbuf
);
644 } else if (data
->stateless_connect
&&
645 (get_protocol_version_config() == protocol_v2
) &&
646 (!strcmp("git-upload-pack", name
) ||
647 !strcmp("git-upload-archive", name
))) {
648 strbuf_addf(&cmdbuf
, "stateless-connect %s\n", name
);
649 ret
= run_connect(transport
, &cmdbuf
);
651 transport
->stateless_rpc
= 1;
654 strbuf_release(&cmdbuf
);
658 static int process_connect(struct transport
*transport
,
661 struct helper_data
*data
= transport
->data
;
666 name
= for_push
? "git-receive-pack" : "git-upload-pack";
668 exec
= data
->transport_options
.receivepack
;
670 exec
= data
->transport_options
.uploadpack
;
672 ret
= process_connect_service(transport
, name
, exec
);
674 do_take_over(transport
);
678 static int connect_helper(struct transport
*transport
, const char *name
,
679 const char *exec
, int fd
[2])
681 struct helper_data
*data
= transport
->data
;
683 /* Get_helper so connect is inited. */
684 get_helper(transport
);
686 if (!process_connect_service(transport
, name
, exec
))
687 die(_("can't connect to subservice %s"), name
);
689 fd
[0] = data
->helper
->out
;
690 fd
[1] = data
->helper
->in
;
692 do_take_over(transport
);
696 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
699 static int fetch_refs(struct transport
*transport
,
700 int nr_heads
, struct ref
**to_fetch
)
702 struct helper_data
*data
= transport
->data
;
705 get_helper(transport
);
707 if (process_connect(transport
, 0))
708 return transport
->vtable
->fetch_refs(transport
, nr_heads
, to_fetch
);
711 * If we reach here, then the server, the client, and/or the transport
712 * helper does not support protocol v2. --negotiate-only requires
715 if (data
->transport_options
.acked_commits
) {
716 warning(_("--negotiate-only requires protocol v2"));
720 if (!data
->get_refs_list_called
)
721 get_refs_list_using_list(transport
, 0);
724 for (i
= 0; i
< nr_heads
; i
++)
725 if (!(to_fetch
[i
]->status
& REF_STATUS_UPTODATE
))
731 if (data
->check_connectivity
&&
732 data
->transport_options
.check_self_contained_and_connected
)
733 set_helper_option(transport
, "check-connectivity", "true");
735 if (transport
->cloning
)
736 set_helper_option(transport
, "cloning", "true");
738 if (data
->transport_options
.update_shallow
)
739 set_helper_option(transport
, "update-shallow", "true");
741 if (data
->transport_options
.refetch
)
742 set_helper_option(transport
, "refetch", "true");
744 if (data
->transport_options
.filter_options
.choice
) {
745 const char *spec
= expand_list_objects_filter_spec(
746 &data
->transport_options
.filter_options
);
747 set_helper_option(transport
, "filter", spec
);
750 if (data
->transport_options
.negotiation_tips
)
751 warning("Ignoring --negotiation-tip because the protocol does not support it.");
754 return fetch_with_fetch(transport
, nr_heads
, to_fetch
);
757 return fetch_with_import(transport
, nr_heads
, to_fetch
);
762 struct push_update_ref_state
{
764 struct ref_push_report
*report
;
768 static int push_update_ref_status(struct strbuf
*buf
,
769 struct push_update_ref_state
*state
,
770 struct ref
*remote_refs
)
773 int status
, forced
= 0;
775 if (starts_with(buf
->buf
, "option ")) {
776 struct object_id old_oid
, new_oid
;
777 const char *key
, *val
;
780 if (!state
->hint
|| !(state
->report
|| state
->new_report
))
781 die(_("'option' without a matching 'ok/error' directive"));
782 if (state
->new_report
) {
783 if (!state
->hint
->report
) {
784 CALLOC_ARRAY(state
->hint
->report
, 1);
785 state
->report
= state
->hint
->report
;
787 state
->report
= state
->hint
->report
;
788 while (state
->report
->next
)
789 state
->report
= state
->report
->next
;
790 CALLOC_ARRAY(state
->report
->next
, 1);
791 state
->report
= state
->report
->next
;
793 state
->new_report
= 0;
796 p
= strchr(key
, ' ');
800 if (!strcmp(key
, "refname"))
801 state
->report
->ref_name
= xstrdup_or_null(val
);
802 else if (!strcmp(key
, "old-oid") && val
&&
803 !parse_oid_hex(val
, &old_oid
, &val
))
804 state
->report
->old_oid
= oiddup(&old_oid
);
805 else if (!strcmp(key
, "new-oid") && val
&&
806 !parse_oid_hex(val
, &new_oid
, &val
))
807 state
->report
->new_oid
= oiddup(&new_oid
);
808 else if (!strcmp(key
, "forced-update"))
809 state
->report
->forced_update
= 1;
810 /* Not update remote namespace again. */
814 state
->report
= NULL
;
815 state
->new_report
= 0;
817 if (starts_with(buf
->buf
, "ok ")) {
818 status
= REF_STATUS_OK
;
819 refname
= buf
->buf
+ 3;
820 } else if (starts_with(buf
->buf
, "error ")) {
821 status
= REF_STATUS_REMOTE_REJECT
;
822 refname
= buf
->buf
+ 6;
824 die(_("expected ok/error, helper said '%s'"), buf
->buf
);
826 msg
= strchr(refname
, ' ');
828 struct strbuf msg_buf
= STRBUF_INIT
;
832 if (!unquote_c_style(&msg_buf
, msg
, &end
))
833 msg
= strbuf_detach(&msg_buf
, NULL
);
836 strbuf_release(&msg_buf
);
838 if (!strcmp(msg
, "no match")) {
839 status
= REF_STATUS_NONE
;
842 else if (!strcmp(msg
, "up to date")) {
843 status
= REF_STATUS_UPTODATE
;
846 else if (!strcmp(msg
, "non-fast forward")) {
847 status
= REF_STATUS_REJECT_NONFASTFORWARD
;
850 else if (!strcmp(msg
, "already exists")) {
851 status
= REF_STATUS_REJECT_ALREADY_EXISTS
;
854 else if (!strcmp(msg
, "fetch first")) {
855 status
= REF_STATUS_REJECT_FETCH_FIRST
;
858 else if (!strcmp(msg
, "needs force")) {
859 status
= REF_STATUS_REJECT_NEEDS_FORCE
;
862 else if (!strcmp(msg
, "stale info")) {
863 status
= REF_STATUS_REJECT_STALE
;
866 else if (!strcmp(msg
, "remote ref updated since checkout")) {
867 status
= REF_STATUS_REJECT_REMOTE_UPDATED
;
870 else if (!strcmp(msg
, "forced update")) {
874 else if (!strcmp(msg
, "expecting report")) {
875 status
= REF_STATUS_EXPECTING_REPORT
;
881 state
->hint
= find_ref_by_name(state
->hint
, refname
);
883 state
->hint
= find_ref_by_name(remote_refs
, refname
);
885 warning(_("helper reported unexpected status of %s"), refname
);
889 if (state
->hint
->status
!= REF_STATUS_NONE
) {
891 * Earlier, the ref was marked not to be pushed, so ignore the ref
892 * status reported by the remote helper if the latter is 'no match'.
894 if (status
== REF_STATUS_NONE
)
898 if (status
== REF_STATUS_OK
)
899 state
->new_report
= 1;
900 state
->hint
->status
= status
;
901 state
->hint
->forced_update
|= forced
;
902 state
->hint
->remote_status
= msg
;
903 return !(status
== REF_STATUS_OK
);
906 static int push_update_refs_status(struct helper_data
*data
,
907 struct ref
*remote_refs
,
911 struct ref_push_report
*report
;
912 struct strbuf buf
= STRBUF_INIT
;
913 struct push_update_ref_state state
= { remote_refs
, NULL
, 0 };
916 if (recvline(data
, &buf
)) {
917 strbuf_release(&buf
);
922 push_update_ref_status(&buf
, &state
, remote_refs
);
924 strbuf_release(&buf
);
926 if (flags
& TRANSPORT_PUSH_DRY_RUN
|| !data
->rs
.nr
|| data
->no_private_update
)
929 /* propagate back the update to the remote namespace */
930 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
933 if (ref
->status
!= REF_STATUS_OK
)
937 private = apply_refspecs(&data
->rs
, ref
->name
);
940 refs_update_ref(get_main_ref_store(the_repository
),
941 "update by helper", private,
946 for (report
= ref
->report
; report
; report
= report
->next
) {
947 private = apply_refspecs(&data
->rs
,
953 refs_update_ref(get_main_ref_store(the_repository
),
954 "update by helper", private,
966 static void set_common_push_options(struct transport
*transport
,
967 const char *name
, int flags
)
969 if (flags
& TRANSPORT_PUSH_DRY_RUN
) {
970 if (set_helper_option(transport
, "dry-run", "true") != 0)
971 die(_("helper %s does not support dry-run"), name
);
972 } else if (flags
& TRANSPORT_PUSH_CERT_ALWAYS
) {
973 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "true") != 0)
974 die(_("helper %s does not support --signed"), name
);
975 } else if (flags
& TRANSPORT_PUSH_CERT_IF_ASKED
) {
976 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "if-asked") != 0)
977 die(_("helper %s does not support --signed=if-asked"), name
);
980 if (flags
& TRANSPORT_PUSH_ATOMIC
)
981 if (set_helper_option(transport
, TRANS_OPT_ATOMIC
, "true") != 0)
982 die(_("helper %s does not support --atomic"), name
);
984 if (flags
& TRANSPORT_PUSH_FORCE_IF_INCLUDES
)
985 if (set_helper_option(transport
, TRANS_OPT_FORCE_IF_INCLUDES
, "true") != 0)
986 die(_("helper %s does not support --%s"),
987 name
, TRANS_OPT_FORCE_IF_INCLUDES
);
989 if (flags
& TRANSPORT_PUSH_OPTIONS
) {
990 struct string_list_item
*item
;
991 for_each_string_list_item(item
, transport
->push_options
)
992 if (set_helper_option(transport
, "push-option", item
->string
) != 0)
993 die(_("helper %s does not support 'push-option'"), name
);
997 static int push_refs_with_push(struct transport
*transport
,
998 struct ref
*remote_refs
, int flags
)
1000 int force_all
= flags
& TRANSPORT_PUSH_FORCE
;
1001 int mirror
= flags
& TRANSPORT_PUSH_MIRROR
;
1002 int atomic
= flags
& TRANSPORT_PUSH_ATOMIC
;
1003 struct helper_data
*data
= transport
->data
;
1004 struct strbuf buf
= STRBUF_INIT
;
1006 struct string_list cas_options
= STRING_LIST_INIT_DUP
;
1007 struct string_list_item
*cas_option
;
1009 get_helper(transport
);
1013 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1014 if (!ref
->peer_ref
&& !mirror
)
1017 /* Check for statuses set by set_ref_status_for_push() */
1018 switch (ref
->status
) {
1019 case REF_STATUS_REJECT_NONFASTFORWARD
:
1020 case REF_STATUS_REJECT_STALE
:
1021 case REF_STATUS_REJECT_ALREADY_EXISTS
:
1022 case REF_STATUS_REJECT_REMOTE_UPDATED
:
1024 reject_atomic_push(remote_refs
, mirror
);
1025 string_list_clear(&cas_options
, 0);
1029 case REF_STATUS_UPTODATE
:
1038 strbuf_addstr(&buf
, "push ");
1039 if (!ref
->deletion
) {
1041 strbuf_addch(&buf
, '+');
1043 strbuf_addstr(&buf
, ref
->peer_ref
->name
);
1045 strbuf_addstr(&buf
, oid_to_hex(&ref
->new_oid
));
1047 strbuf_addch(&buf
, ':');
1048 strbuf_addstr(&buf
, ref
->name
);
1049 strbuf_addch(&buf
, '\n');
1052 * The "--force-with-lease" options without explicit
1053 * values to expect have already been expanded into
1054 * the ref->old_oid_expect[] field; we can ignore
1055 * transport->smart_options->cas altogether and instead
1056 * can enumerate them from the refs.
1058 if (ref
->expect_old_sha1
) {
1059 struct strbuf cas
= STRBUF_INIT
;
1060 strbuf_addf(&cas
, "%s:%s",
1061 ref
->name
, oid_to_hex(&ref
->old_oid_expect
));
1062 string_list_append_nodup(&cas_options
,
1063 strbuf_detach(&cas
, NULL
));
1067 string_list_clear(&cas_options
, 0);
1071 for_each_string_list_item(cas_option
, &cas_options
)
1072 set_helper_option(transport
, "cas", cas_option
->string
);
1073 set_common_push_options(transport
, data
->name
, flags
);
1075 strbuf_addch(&buf
, '\n');
1076 sendline(data
, &buf
);
1077 strbuf_release(&buf
);
1078 string_list_clear(&cas_options
, 0);
1080 return push_update_refs_status(data
, remote_refs
, flags
);
1083 static int push_refs_with_export(struct transport
*transport
,
1084 struct ref
*remote_refs
, int flags
)
1087 struct child_process
*helper
, exporter
;
1088 struct helper_data
*data
= transport
->data
;
1089 struct string_list revlist_args
= STRING_LIST_INIT_DUP
;
1090 struct strbuf buf
= STRBUF_INIT
;
1093 die(_("remote-helper doesn't support push; refspec needed"));
1095 set_common_push_options(transport
, data
->name
, flags
);
1096 if (flags
& TRANSPORT_PUSH_FORCE
) {
1097 if (set_helper_option(transport
, "force", "true") != 0)
1098 warning(_("helper %s does not support '--force'"), data
->name
);
1101 helper
= get_helper(transport
);
1103 write_constant(helper
->in
, "export\n");
1105 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1107 struct object_id oid
;
1109 private = apply_refspecs(&data
->rs
, ref
->name
);
1110 if (private && !repo_get_oid(the_repository
, private, &oid
)) {
1111 strbuf_addf(&buf
, "^%s", private);
1112 string_list_append_nodup(&revlist_args
,
1113 strbuf_detach(&buf
, NULL
));
1114 oidcpy(&ref
->old_oid
, &oid
);
1118 if (ref
->peer_ref
) {
1119 if (strcmp(ref
->name
, ref
->peer_ref
->name
)) {
1120 if (!ref
->deletion
) {
1124 /* Follow symbolic refs (mainly for HEAD). */
1125 name
= refs_resolve_ref_unsafe(get_main_ref_store(the_repository
),
1126 ref
->peer_ref
->name
,
1127 RESOLVE_REF_READING
,
1130 if (!name
|| !(flag
& REF_ISSYMREF
))
1131 name
= ref
->peer_ref
->name
;
1133 strbuf_addf(&buf
, "%s:%s", name
, ref
->name
);
1135 strbuf_addf(&buf
, ":%s", ref
->name
);
1137 string_list_append(&revlist_args
, "--refspec");
1138 string_list_append(&revlist_args
, buf
.buf
);
1139 strbuf_release(&buf
);
1142 string_list_append(&revlist_args
, ref
->peer_ref
->name
);
1146 if (get_exporter(transport
, &exporter
, &revlist_args
))
1147 die(_("couldn't run fast-export"));
1149 string_list_clear(&revlist_args
, 1);
1151 if (finish_command(&exporter
))
1152 die(_("error while running fast-export"));
1153 if (push_update_refs_status(data
, remote_refs
, flags
))
1156 if (data
->export_marks
) {
1157 strbuf_addf(&buf
, "%s.tmp", data
->export_marks
);
1158 rename(buf
.buf
, data
->export_marks
);
1159 strbuf_release(&buf
);
1165 static int push_refs(struct transport
*transport
,
1166 struct ref
*remote_refs
, int flags
)
1168 struct helper_data
*data
= transport
->data
;
1170 if (process_connect(transport
, 1))
1171 return transport
->vtable
->push_refs(transport
, remote_refs
, flags
);
1175 _("No refs in common and none specified; doing nothing.\n"
1176 "Perhaps you should specify a branch.\n"));
1181 return push_refs_with_push(transport
, remote_refs
, flags
);
1184 return push_refs_with_export(transport
, remote_refs
, flags
);
1190 static int has_attribute(const char *attrs
, const char *attr
)
1198 const char *space
= strchrnul(attrs
, ' ');
1199 if (len
== space
- attrs
&& !strncmp(attrs
, attr
, len
))
1207 static struct ref
*get_refs_list(struct transport
*transport
, int for_push
,
1208 struct transport_ls_refs_options
*transport_options
)
1210 get_helper(transport
);
1212 if (process_connect(transport
, for_push
))
1213 return transport
->vtable
->get_refs_list(transport
, for_push
,
1216 return get_refs_list_using_list(transport
, for_push
);
1219 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
1222 struct helper_data
*data
= transport
->data
;
1223 struct child_process
*helper
;
1224 struct ref
*ret
= NULL
;
1225 struct ref
**tail
= &ret
;
1227 struct strbuf buf
= STRBUF_INIT
;
1229 data
->get_refs_list_called
= 1;
1230 helper
= get_helper(transport
);
1232 if (data
->object_format
)
1233 set_helper_option(transport
, "object-format", "true");
1235 if (data
->push
&& for_push
)
1236 write_constant(helper
->in
, "list for-push\n");
1238 write_constant(helper
->in
, "list\n");
1242 if (recvline(data
, &buf
))
1247 else if (buf
.buf
[0] == ':') {
1249 if (skip_prefix(buf
.buf
, ":object-format ", &value
)) {
1250 int algo
= hash_algo_by_name(value
);
1251 if (algo
== GIT_HASH_UNKNOWN
)
1252 die(_("unsupported object format '%s'"),
1254 transport
->hash_algo
= &hash_algos
[algo
];
1259 eov
= strchr(buf
.buf
, ' ');
1261 die(_("malformed response in ref list: %s"), buf
.buf
);
1262 eon
= strchr(eov
+ 1, ' ');
1266 *tail
= alloc_ref(eov
+ 1);
1267 if (buf
.buf
[0] == '@')
1268 (*tail
)->symref
= xstrdup(buf
.buf
+ 1);
1269 else if (buf
.buf
[0] != '?')
1270 get_oid_hex_algop(buf
.buf
, &(*tail
)->old_oid
, transport
->hash_algo
);
1272 if (has_attribute(eon
+ 1, "unchanged")) {
1273 (*tail
)->status
|= REF_STATUS_UPTODATE
;
1274 if (refs_read_ref(get_main_ref_store(the_repository
), (*tail
)->name
, &(*tail
)->old_oid
) < 0)
1275 die(_("could not read ref %s"),
1279 tail
= &((*tail
)->next
);
1282 fprintf(stderr
, "Debug: Read ref listing.\n");
1283 strbuf_release(&buf
);
1285 for (posn
= ret
; posn
; posn
= posn
->next
)
1286 resolve_remote_symref(posn
, ret
);
1291 static int get_bundle_uri(struct transport
*transport
)
1293 get_helper(transport
);
1295 if (process_connect(transport
, 0))
1296 return transport
->vtable
->get_bundle_uri(transport
);
1301 static struct transport_vtable vtable
= {
1302 .set_option
= set_helper_option
,
1303 .get_refs_list
= get_refs_list
,
1304 .get_bundle_uri
= get_bundle_uri
,
1305 .fetch_refs
= fetch_refs
,
1306 .push_refs
= push_refs
,
1307 .connect
= connect_helper
,
1308 .disconnect
= release_helper
1311 int transport_helper_init(struct transport
*transport
, const char *name
)
1313 struct helper_data
*data
= xcalloc(1, sizeof(*data
));
1314 data
->name
= xstrdup(name
);
1316 transport_check_allowed(name
);
1318 if (getenv("GIT_TRANSPORT_HELPER_DEBUG"))
1321 list_objects_filter_init(&data
->transport_options
.filter_options
);
1323 transport
->data
= data
;
1324 transport
->vtable
= &vtable
;
1325 transport
->smart_options
= &(data
->transport_options
);
1330 * Linux pipes can buffer 65536 bytes at once (and most platforms can
1331 * buffer less), so attempt reads and writes with up to that size.
1333 #define BUFFERSIZE 65536
1334 /* This should be enough to hold debugging message. */
1335 #define PBUFFERSIZE 8192
1337 /* Print bidirectional transfer loop debug message. */
1338 __attribute__((format (printf
, 1, 2)))
1339 static void transfer_debug(const char *fmt
, ...)
1342 * NEEDSWORK: This function is sometimes used from multiple threads, and
1343 * we end up using debug_enabled racily. That "should not matter" since
1344 * we always write the same value, but it's still wrong. This function
1345 * is listed in .tsan-suppressions for the time being.
1349 char msgbuf
[PBUFFERSIZE
];
1350 static int debug_enabled
= -1;
1352 if (debug_enabled
< 0)
1353 debug_enabled
= getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0;
1357 va_start(args
, fmt
);
1358 vsnprintf(msgbuf
, PBUFFERSIZE
, fmt
, args
);
1360 fprintf(stderr
, "Transfer loop debugging: %s\n", msgbuf
);
1363 /* Stream state: More data may be coming in this direction. */
1364 #define SSTATE_TRANSFERRING 0
1366 * Stream state: No more data coming in this direction, flushing rest of
1369 #define SSTATE_FLUSHING 1
1370 /* Stream state: Transfer in this direction finished. */
1371 #define SSTATE_FINISHED 2
1373 #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING)
1374 #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING)
1375 #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING)
1377 /* Unidirectional transfer. */
1378 struct unidirectional_transfer
{
1383 /* Is source socket? */
1385 /* Is destination socket? */
1387 /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */
1390 char buf
[BUFFERSIZE
];
1393 /* Name of source. */
1394 const char *src_name
;
1395 /* Name of destination. */
1396 const char *dest_name
;
1399 /* Closes the target (for writing) if transfer has finished. */
1400 static void udt_close_if_finished(struct unidirectional_transfer
*t
)
1402 if (STATE_NEEDS_CLOSING(t
->state
) && !t
->bufuse
) {
1403 t
->state
= SSTATE_FINISHED
;
1404 if (t
->dest_is_sock
)
1405 shutdown(t
->dest
, SHUT_WR
);
1408 transfer_debug("Closed %s.", t
->dest_name
);
1413 * Tries to read data from source into buffer. If buffer is full,
1414 * no data is read. Returns 0 on success, -1 on error.
1416 static int udt_do_read(struct unidirectional_transfer
*t
)
1420 if (t
->bufuse
== BUFFERSIZE
)
1421 return 0; /* No space for more. */
1423 transfer_debug("%s is readable", t
->src_name
);
1424 bytes
= xread(t
->src
, t
->buf
+ t
->bufuse
, BUFFERSIZE
- t
->bufuse
);
1426 error_errno(_("read(%s) failed"), t
->src_name
);
1428 } else if (bytes
== 0) {
1429 transfer_debug("%s EOF (with %i bytes in buffer)",
1430 t
->src_name
, (int)t
->bufuse
);
1431 t
->state
= SSTATE_FLUSHING
;
1432 } else if (bytes
> 0) {
1434 transfer_debug("Read %i bytes from %s (buffer now at %i)",
1435 (int)bytes
, t
->src_name
, (int)t
->bufuse
);
1440 /* Tries to write data from buffer into destination. If buffer is empty,
1441 * no data is written. Returns 0 on success, -1 on error.
1443 static int udt_do_write(struct unidirectional_transfer
*t
)
1448 return 0; /* Nothing to write. */
1450 transfer_debug("%s is writable", t
->dest_name
);
1451 bytes
= xwrite(t
->dest
, t
->buf
, t
->bufuse
);
1453 error_errno(_("write(%s) failed"), t
->dest_name
);
1455 } else if (bytes
> 0) {
1458 memmove(t
->buf
, t
->buf
+ bytes
, t
->bufuse
);
1459 transfer_debug("Wrote %i bytes to %s (buffer now at %i)",
1460 (int)bytes
, t
->dest_name
, (int)t
->bufuse
);
1466 /* State of bidirectional transfer loop. */
1467 struct bidirectional_transfer_state
{
1468 /* Direction from program to git. */
1469 struct unidirectional_transfer ptg
;
1470 /* Direction from git to program. */
1471 struct unidirectional_transfer gtp
;
1474 static void *udt_copy_task_routine(void *udt
)
1476 struct unidirectional_transfer
*t
= (struct unidirectional_transfer
*)udt
;
1477 while (t
->state
!= SSTATE_FINISHED
) {
1478 if (STATE_NEEDS_READING(t
->state
))
1481 if (STATE_NEEDS_WRITING(t
->state
))
1482 if (udt_do_write(t
))
1484 if (STATE_NEEDS_CLOSING(t
->state
))
1485 udt_close_if_finished(t
);
1487 return udt
; /* Just some non-NULL value. */
1493 * Join thread, with appropriate errors on failure. Name is name for the
1494 * thread (for error messages). Returns 0 on success, 1 on failure.
1496 static int tloop_join(pthread_t thread
, const char *name
)
1500 err
= pthread_join(thread
, &tret
);
1502 error(_("%s thread failed"), name
);
1506 error(_("%s thread failed to join: %s"), name
, strerror(err
));
1513 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1516 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1518 pthread_t gtp_thread
;
1519 pthread_t ptg_thread
;
1522 err
= pthread_create(>p_thread
, NULL
, udt_copy_task_routine
,
1525 die(_("can't start thread for copying data: %s"), strerror(err
));
1526 err
= pthread_create(&ptg_thread
, NULL
, udt_copy_task_routine
,
1529 die(_("can't start thread for copying data: %s"), strerror(err
));
1531 ret
|= tloop_join(gtp_thread
, "Git to program copy");
1532 ret
|= tloop_join(ptg_thread
, "Program to git copy");
1537 /* Close the source and target (for writing) for transfer. */
1538 static void udt_kill_transfer(struct unidirectional_transfer
*t
)
1540 t
->state
= SSTATE_FINISHED
;
1542 * Socket read end left open isn't a disaster if nobody
1543 * attempts to read from it (mingw compat headers do not
1546 * We can't fully close the socket since otherwise gtp
1547 * task would first close the socket it sends data to
1548 * while closing the ptg file descriptors.
1550 if (!t
->src_is_sock
)
1552 if (t
->dest_is_sock
)
1553 shutdown(t
->dest
, SHUT_WR
);
1559 * Join process, with appropriate errors on failure. Name is name for the
1560 * process (for error messages). Returns 0 on success, 1 on failure.
1562 static int tloop_join(pid_t pid
, const char *name
)
1565 if (waitpid(pid
, &tret
, 0) < 0) {
1566 error_errno(_("%s process failed to wait"), name
);
1569 if (!WIFEXITED(tret
) || WEXITSTATUS(tret
)) {
1570 error(_("%s process failed"), name
);
1577 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1580 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1585 /* Fork thread #1: git to program. */
1588 die_errno(_("can't start thread for copying data"));
1589 else if (pid1
== 0) {
1590 udt_kill_transfer(&s
->ptg
);
1591 exit(udt_copy_task_routine(&s
->gtp
) ? 0 : 1);
1594 /* Fork thread #2: program to git. */
1597 die_errno(_("can't start thread for copying data"));
1598 else if (pid2
== 0) {
1599 udt_kill_transfer(&s
->gtp
);
1600 exit(udt_copy_task_routine(&s
->ptg
) ? 0 : 1);
1604 * Close both streams in parent as to not interfere with
1605 * end of file detection and wait for both tasks to finish.
1607 udt_kill_transfer(&s
->gtp
);
1608 udt_kill_transfer(&s
->ptg
);
1609 ret
|= tloop_join(pid1
, "Git to program copy");
1610 ret
|= tloop_join(pid2
, "Program to git copy");
1616 * Copies data from stdin to output and from input to stdout simultaneously.
1617 * Additionally filtering through given filter. If filter is NULL, uses
1620 int bidirectional_transfer_loop(int input
, int output
)
1622 struct bidirectional_transfer_state state
;
1624 /* Fill the state fields. */
1625 state
.ptg
.src
= input
;
1627 state
.ptg
.src_is_sock
= (input
== output
);
1628 state
.ptg
.dest_is_sock
= 0;
1629 state
.ptg
.state
= SSTATE_TRANSFERRING
;
1630 state
.ptg
.bufuse
= 0;
1631 state
.ptg
.src_name
= "remote input";
1632 state
.ptg
.dest_name
= "stdout";
1635 state
.gtp
.dest
= output
;
1636 state
.gtp
.src_is_sock
= 0;
1637 state
.gtp
.dest_is_sock
= (input
== output
);
1638 state
.gtp
.state
= SSTATE_TRANSFERRING
;
1639 state
.gtp
.bufuse
= 0;
1640 state
.gtp
.src_name
= "stdin";
1641 state
.gtp
.dest_name
= "remote output";
1643 return tloop_spawnwait_tasks(&state
);
1646 void reject_atomic_push(struct ref
*remote_refs
, int mirror_mode
)
1650 /* Mark other refs as failed */
1651 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1652 if (!ref
->peer_ref
&& !mirror_mode
)
1655 switch (ref
->status
) {
1656 case REF_STATUS_NONE
:
1658 case REF_STATUS_EXPECTING_REPORT
:
1659 ref
->status
= REF_STATUS_ATOMIC_PUSH_FAILED
;
1662 break; /* do nothing */