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 free(data
->import_marks
);
403 free(data
->export_marks
);
404 res
= disconnect_helper(transport
);
405 free(transport
->data
);
409 static int fetch_with_fetch(struct transport
*transport
,
410 int nr_heads
, struct ref
**to_fetch
)
412 struct helper_data
*data
= transport
->data
;
414 struct strbuf buf
= STRBUF_INIT
;
416 for (i
= 0; i
< nr_heads
; i
++) {
417 const struct ref
*posn
= to_fetch
[i
];
418 if (posn
->status
& REF_STATUS_UPTODATE
)
421 strbuf_addf(&buf
, "fetch %s %s\n",
422 oid_to_hex(&posn
->old_oid
),
423 posn
->symref
? posn
->symref
: posn
->name
);
426 strbuf_addch(&buf
, '\n');
427 sendline(data
, &buf
);
432 if (recvline(data
, &buf
))
435 if (skip_prefix(buf
.buf
, "lock ", &name
)) {
436 if (transport
->pack_lockfiles
.nr
)
437 warning(_("%s also locked %s"), data
->name
, name
);
439 string_list_append(&transport
->pack_lockfiles
,
442 else if (data
->check_connectivity
&&
443 data
->transport_options
.check_self_contained_and_connected
&&
444 !strcmp(buf
.buf
, "connectivity-ok"))
445 data
->transport_options
.self_contained_and_connected
= 1;
449 warning(_("%s unexpectedly said: '%s'"), data
->name
, buf
.buf
);
451 strbuf_release(&buf
);
453 reprepare_packed_git(the_repository
);
457 static int get_importer(struct transport
*transport
, struct child_process
*fastimport
)
459 struct child_process
*helper
= get_helper(transport
);
460 struct helper_data
*data
= transport
->data
;
461 int cat_blob_fd
, code
;
462 child_process_init(fastimport
);
463 fastimport
->in
= xdup(helper
->out
);
464 strvec_push(&fastimport
->args
, "fast-import");
465 strvec_push(&fastimport
->args
, "--allow-unsafe-features");
466 strvec_push(&fastimport
->args
, debug
? "--stats" : "--quiet");
468 if (data
->bidi_import
) {
469 cat_blob_fd
= xdup(helper
->in
);
470 strvec_pushf(&fastimport
->args
, "--cat-blob-fd=%d", cat_blob_fd
);
472 fastimport
->git_cmd
= 1;
474 code
= start_command(fastimport
);
478 static int get_exporter(struct transport
*transport
,
479 struct child_process
*fastexport
,
480 struct string_list
*revlist_args
)
482 struct helper_data
*data
= transport
->data
;
483 struct child_process
*helper
= get_helper(transport
);
486 child_process_init(fastexport
);
488 /* we need to duplicate helper->in because we want to use it after
489 * fastexport is done with it. */
490 fastexport
->out
= dup(helper
->in
);
491 strvec_push(&fastexport
->args
, "fast-export");
492 strvec_push(&fastexport
->args
, "--use-done-feature");
493 strvec_push(&fastexport
->args
, data
->signed_tags
?
494 "--signed-tags=verbatim" : "--signed-tags=warn-strip");
495 if (data
->export_marks
)
496 strvec_pushf(&fastexport
->args
, "--export-marks=%s.tmp", data
->export_marks
);
497 if (data
->import_marks
)
498 strvec_pushf(&fastexport
->args
, "--import-marks=%s", data
->import_marks
);
500 for (i
= 0; i
< revlist_args
->nr
; i
++)
501 strvec_push(&fastexport
->args
, revlist_args
->items
[i
].string
);
503 fastexport
->git_cmd
= 1;
504 return start_command(fastexport
);
507 static int fetch_with_import(struct transport
*transport
,
508 int nr_heads
, struct ref
**to_fetch
)
510 struct child_process fastimport
;
511 struct helper_data
*data
= transport
->data
;
514 struct strbuf buf
= STRBUF_INIT
;
516 get_helper(transport
);
518 if (get_importer(transport
, &fastimport
))
519 die(_("couldn't run fast-import"));
521 for (i
= 0; i
< nr_heads
; i
++) {
523 if (posn
->status
& REF_STATUS_UPTODATE
)
526 strbuf_addf(&buf
, "import %s\n",
527 posn
->symref
? posn
->symref
: posn
->name
);
528 sendline(data
, &buf
);
532 write_constant(data
->helper
->in
, "\n");
534 * remote-helpers that advertise the bidi-import capability are required to
535 * buffer the complete batch of import commands until this newline before
536 * sending data to fast-import.
537 * These helpers read back data from fast-import on their stdin, which could
538 * be mixed with import commands, otherwise.
541 if (finish_command(&fastimport
))
542 die(_("error while running fast-import"));
545 * The fast-import stream of a remote helper that advertises
546 * the "refspec" capability writes to the refs named after the
547 * right hand side of the first refspec matching each ref we
550 * (If no "refspec" capability was specified, for historical
551 * reasons we default to the equivalent of *:*.)
553 * Store the result in to_fetch[i].old_sha1. Callers such
554 * as "git fetch" can use the value to write feedback to the
555 * terminal, populate FETCH_HEAD, and determine what new value
556 * should be written to peer_ref if the update is a
557 * fast-forward or this is a forced update.
559 for (i
= 0; i
< nr_heads
; i
++) {
560 char *private, *name
;
562 if (posn
->status
& REF_STATUS_UPTODATE
)
564 name
= posn
->symref
? posn
->symref
: posn
->name
;
566 private = apply_refspecs(&data
->rs
, name
);
568 private = xstrdup(name
);
570 if (refs_read_ref(get_main_ref_store(the_repository
), private, &posn
->old_oid
) < 0)
571 die(_("could not read ref %s"), private);
575 strbuf_release(&buf
);
579 static int run_connect(struct transport
*transport
, struct strbuf
*cmdbuf
)
581 struct helper_data
*data
= transport
->data
;
585 struct child_process
*helper
;
587 helper
= get_helper(transport
);
590 * Yes, dup the pipe another time, as we need unbuffered version
591 * of input pipe as FILE*. fclose() closes the underlying fd and
592 * stream buffering only can be changed before first I/O operation
595 duped
= dup(helper
->out
);
597 die_errno(_("can't dup helper output fd"));
598 input
= xfdopen(duped
, "r");
599 setvbuf(input
, NULL
, _IONBF
, 0);
601 sendline(data
, cmdbuf
);
602 if (recvline_fh(input
, cmdbuf
))
605 if (!strcmp(cmdbuf
->buf
, "")) {
606 data
->no_disconnect_req
= 1;
608 fprintf(stderr
, "Debug: Smart transport connection "
611 } else if (!strcmp(cmdbuf
->buf
, "fallback")) {
613 fprintf(stderr
, "Debug: Falling back to dumb "
616 die(_("unknown response to connect: %s"),
624 static int process_connect_service(struct transport
*transport
,
625 const char *name
, const char *exec
)
627 struct helper_data
*data
= transport
->data
;
628 struct strbuf cmdbuf
= STRBUF_INIT
;
632 * Handle --upload-pack and friends. This is fire and forget...
633 * just warn if it fails.
635 if (strcmp(name
, exec
)) {
636 int r
= set_helper_option(transport
, "servpath", exec
);
638 warning(_("setting remote service path not supported by protocol"));
640 warning(_("invalid remote service path"));
644 strbuf_addf(&cmdbuf
, "connect %s\n", name
);
645 ret
= run_connect(transport
, &cmdbuf
);
646 } else if (data
->stateless_connect
&&
647 (get_protocol_version_config() == protocol_v2
) &&
648 (!strcmp("git-upload-pack", name
) ||
649 !strcmp("git-upload-archive", name
))) {
650 strbuf_addf(&cmdbuf
, "stateless-connect %s\n", name
);
651 ret
= run_connect(transport
, &cmdbuf
);
653 transport
->stateless_rpc
= 1;
656 strbuf_release(&cmdbuf
);
660 static int process_connect(struct transport
*transport
,
663 struct helper_data
*data
= transport
->data
;
668 name
= for_push
? "git-receive-pack" : "git-upload-pack";
670 exec
= data
->transport_options
.receivepack
;
672 exec
= data
->transport_options
.uploadpack
;
674 ret
= process_connect_service(transport
, name
, exec
);
676 do_take_over(transport
);
680 static int connect_helper(struct transport
*transport
, const char *name
,
681 const char *exec
, int fd
[2])
683 struct helper_data
*data
= transport
->data
;
685 /* Get_helper so connect is inited. */
686 get_helper(transport
);
688 if (!process_connect_service(transport
, name
, exec
))
689 die(_("can't connect to subservice %s"), name
);
691 fd
[0] = data
->helper
->out
;
692 fd
[1] = data
->helper
->in
;
694 do_take_over(transport
);
698 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
701 static int fetch_refs(struct transport
*transport
,
702 int nr_heads
, struct ref
**to_fetch
)
704 struct helper_data
*data
= transport
->data
;
707 get_helper(transport
);
709 if (process_connect(transport
, 0))
710 return transport
->vtable
->fetch_refs(transport
, nr_heads
, to_fetch
);
713 * If we reach here, then the server, the client, and/or the transport
714 * helper does not support protocol v2. --negotiate-only requires
717 if (data
->transport_options
.acked_commits
) {
718 warning(_("--negotiate-only requires protocol v2"));
722 if (!data
->get_refs_list_called
) {
724 * We do not care about the list of refs returned, but only
725 * that the "list" command was sent.
727 struct ref
*dummy
= get_refs_list_using_list(transport
, 0);
732 for (i
= 0; i
< nr_heads
; i
++)
733 if (!(to_fetch
[i
]->status
& REF_STATUS_UPTODATE
))
739 if (data
->check_connectivity
&&
740 data
->transport_options
.check_self_contained_and_connected
)
741 set_helper_option(transport
, "check-connectivity", "true");
743 if (transport
->cloning
)
744 set_helper_option(transport
, "cloning", "true");
746 if (data
->transport_options
.update_shallow
)
747 set_helper_option(transport
, "update-shallow", "true");
749 if (data
->transport_options
.refetch
)
750 set_helper_option(transport
, "refetch", "true");
752 if (data
->transport_options
.filter_options
.choice
) {
753 const char *spec
= expand_list_objects_filter_spec(
754 &data
->transport_options
.filter_options
);
755 set_helper_option(transport
, "filter", spec
);
758 if (data
->transport_options
.negotiation_tips
)
759 warning("Ignoring --negotiation-tip because the protocol does not support it.");
762 return fetch_with_fetch(transport
, nr_heads
, to_fetch
);
765 return fetch_with_import(transport
, nr_heads
, to_fetch
);
770 struct push_update_ref_state
{
772 struct ref_push_report
*report
;
776 static int push_update_ref_status(struct strbuf
*buf
,
777 struct push_update_ref_state
*state
,
778 struct ref
*remote_refs
)
781 int status
, forced
= 0;
783 if (starts_with(buf
->buf
, "option ")) {
784 struct object_id old_oid
, new_oid
;
785 const char *key
, *val
;
788 if (!state
->hint
|| !(state
->report
|| state
->new_report
))
789 die(_("'option' without a matching 'ok/error' directive"));
790 if (state
->new_report
) {
791 if (!state
->hint
->report
) {
792 CALLOC_ARRAY(state
->hint
->report
, 1);
793 state
->report
= state
->hint
->report
;
795 state
->report
= state
->hint
->report
;
796 while (state
->report
->next
)
797 state
->report
= state
->report
->next
;
798 CALLOC_ARRAY(state
->report
->next
, 1);
799 state
->report
= state
->report
->next
;
801 state
->new_report
= 0;
804 p
= strchr(key
, ' ');
808 if (!strcmp(key
, "refname"))
809 state
->report
->ref_name
= xstrdup_or_null(val
);
810 else if (!strcmp(key
, "old-oid") && val
&&
811 !parse_oid_hex(val
, &old_oid
, &val
))
812 state
->report
->old_oid
= oiddup(&old_oid
);
813 else if (!strcmp(key
, "new-oid") && val
&&
814 !parse_oid_hex(val
, &new_oid
, &val
))
815 state
->report
->new_oid
= oiddup(&new_oid
);
816 else if (!strcmp(key
, "forced-update"))
817 state
->report
->forced_update
= 1;
818 /* Not update remote namespace again. */
822 state
->report
= NULL
;
823 state
->new_report
= 0;
825 if (starts_with(buf
->buf
, "ok ")) {
826 status
= REF_STATUS_OK
;
827 refname
= buf
->buf
+ 3;
828 } else if (starts_with(buf
->buf
, "error ")) {
829 status
= REF_STATUS_REMOTE_REJECT
;
830 refname
= buf
->buf
+ 6;
832 die(_("expected ok/error, helper said '%s'"), buf
->buf
);
834 msg
= strchr(refname
, ' ');
836 struct strbuf msg_buf
= STRBUF_INIT
;
840 if (!unquote_c_style(&msg_buf
, msg
, &end
))
841 msg
= strbuf_detach(&msg_buf
, NULL
);
844 strbuf_release(&msg_buf
);
846 if (!strcmp(msg
, "no match")) {
847 status
= REF_STATUS_NONE
;
850 else if (!strcmp(msg
, "up to date")) {
851 status
= REF_STATUS_UPTODATE
;
854 else if (!strcmp(msg
, "non-fast forward")) {
855 status
= REF_STATUS_REJECT_NONFASTFORWARD
;
858 else if (!strcmp(msg
, "already exists")) {
859 status
= REF_STATUS_REJECT_ALREADY_EXISTS
;
862 else if (!strcmp(msg
, "fetch first")) {
863 status
= REF_STATUS_REJECT_FETCH_FIRST
;
866 else if (!strcmp(msg
, "needs force")) {
867 status
= REF_STATUS_REJECT_NEEDS_FORCE
;
870 else if (!strcmp(msg
, "stale info")) {
871 status
= REF_STATUS_REJECT_STALE
;
874 else if (!strcmp(msg
, "remote ref updated since checkout")) {
875 status
= REF_STATUS_REJECT_REMOTE_UPDATED
;
878 else if (!strcmp(msg
, "forced update")) {
882 else if (!strcmp(msg
, "expecting report")) {
883 status
= REF_STATUS_EXPECTING_REPORT
;
889 state
->hint
= find_ref_by_name(state
->hint
, refname
);
891 state
->hint
= find_ref_by_name(remote_refs
, refname
);
893 warning(_("helper reported unexpected status of %s"), refname
);
897 if (state
->hint
->status
!= REF_STATUS_NONE
) {
899 * Earlier, the ref was marked not to be pushed, so ignore the ref
900 * status reported by the remote helper if the latter is 'no match'.
902 if (status
== REF_STATUS_NONE
)
906 if (status
== REF_STATUS_OK
)
907 state
->new_report
= 1;
908 state
->hint
->status
= status
;
909 state
->hint
->forced_update
|= forced
;
910 state
->hint
->remote_status
= msg
;
911 return !(status
== REF_STATUS_OK
);
914 static int push_update_refs_status(struct helper_data
*data
,
915 struct ref
*remote_refs
,
919 struct ref_push_report
*report
;
920 struct strbuf buf
= STRBUF_INIT
;
921 struct push_update_ref_state state
= { remote_refs
, NULL
, 0 };
924 if (recvline(data
, &buf
)) {
925 strbuf_release(&buf
);
930 push_update_ref_status(&buf
, &state
, remote_refs
);
932 strbuf_release(&buf
);
934 if (flags
& TRANSPORT_PUSH_DRY_RUN
|| !data
->rs
.nr
|| data
->no_private_update
)
937 /* propagate back the update to the remote namespace */
938 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
941 if (ref
->status
!= REF_STATUS_OK
)
945 private = apply_refspecs(&data
->rs
, ref
->name
);
948 refs_update_ref(get_main_ref_store(the_repository
),
949 "update by helper", private,
954 for (report
= ref
->report
; report
; report
= report
->next
) {
955 private = apply_refspecs(&data
->rs
,
961 refs_update_ref(get_main_ref_store(the_repository
),
962 "update by helper", private,
974 static void set_common_push_options(struct transport
*transport
,
975 const char *name
, int flags
)
977 if (flags
& TRANSPORT_PUSH_DRY_RUN
) {
978 if (set_helper_option(transport
, "dry-run", "true") != 0)
979 die(_("helper %s does not support dry-run"), name
);
980 } else if (flags
& TRANSPORT_PUSH_CERT_ALWAYS
) {
981 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "true") != 0)
982 die(_("helper %s does not support --signed"), name
);
983 } else if (flags
& TRANSPORT_PUSH_CERT_IF_ASKED
) {
984 if (set_helper_option(transport
, TRANS_OPT_PUSH_CERT
, "if-asked") != 0)
985 die(_("helper %s does not support --signed=if-asked"), name
);
988 if (flags
& TRANSPORT_PUSH_ATOMIC
)
989 if (set_helper_option(transport
, TRANS_OPT_ATOMIC
, "true") != 0)
990 die(_("helper %s does not support --atomic"), name
);
992 if (flags
& TRANSPORT_PUSH_FORCE_IF_INCLUDES
)
993 if (set_helper_option(transport
, TRANS_OPT_FORCE_IF_INCLUDES
, "true") != 0)
994 die(_("helper %s does not support --%s"),
995 name
, TRANS_OPT_FORCE_IF_INCLUDES
);
997 if (flags
& TRANSPORT_PUSH_OPTIONS
) {
998 struct string_list_item
*item
;
999 for_each_string_list_item(item
, transport
->push_options
)
1000 if (set_helper_option(transport
, "push-option", item
->string
) != 0)
1001 die(_("helper %s does not support 'push-option'"), name
);
1005 static int push_refs_with_push(struct transport
*transport
,
1006 struct ref
*remote_refs
, int flags
)
1008 int force_all
= flags
& TRANSPORT_PUSH_FORCE
;
1009 int mirror
= flags
& TRANSPORT_PUSH_MIRROR
;
1010 int atomic
= flags
& TRANSPORT_PUSH_ATOMIC
;
1011 struct helper_data
*data
= transport
->data
;
1012 struct strbuf buf
= STRBUF_INIT
;
1014 struct string_list cas_options
= STRING_LIST_INIT_DUP
;
1015 struct string_list_item
*cas_option
;
1017 get_helper(transport
);
1021 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1022 if (!ref
->peer_ref
&& !mirror
)
1025 /* Check for statuses set by set_ref_status_for_push() */
1026 switch (ref
->status
) {
1027 case REF_STATUS_REJECT_NONFASTFORWARD
:
1028 case REF_STATUS_REJECT_STALE
:
1029 case REF_STATUS_REJECT_ALREADY_EXISTS
:
1030 case REF_STATUS_REJECT_REMOTE_UPDATED
:
1032 reject_atomic_push(remote_refs
, mirror
);
1033 string_list_clear(&cas_options
, 0);
1034 strbuf_release(&buf
);
1038 case REF_STATUS_UPTODATE
:
1047 strbuf_addstr(&buf
, "push ");
1048 if (!ref
->deletion
) {
1050 strbuf_addch(&buf
, '+');
1052 strbuf_addstr(&buf
, ref
->peer_ref
->name
);
1054 strbuf_addstr(&buf
, oid_to_hex(&ref
->new_oid
));
1056 strbuf_addch(&buf
, ':');
1057 strbuf_addstr(&buf
, ref
->name
);
1058 strbuf_addch(&buf
, '\n');
1061 * The "--force-with-lease" options without explicit
1062 * values to expect have already been expanded into
1063 * the ref->old_oid_expect[] field; we can ignore
1064 * transport->smart_options->cas altogether and instead
1065 * can enumerate them from the refs.
1067 if (ref
->expect_old_sha1
) {
1068 struct strbuf cas
= STRBUF_INIT
;
1069 strbuf_addf(&cas
, "%s:%s",
1070 ref
->name
, oid_to_hex(&ref
->old_oid_expect
));
1071 string_list_append_nodup(&cas_options
,
1072 strbuf_detach(&cas
, NULL
));
1076 string_list_clear(&cas_options
, 0);
1080 for_each_string_list_item(cas_option
, &cas_options
)
1081 set_helper_option(transport
, "cas", cas_option
->string
);
1082 set_common_push_options(transport
, data
->name
, flags
);
1084 strbuf_addch(&buf
, '\n');
1085 sendline(data
, &buf
);
1086 strbuf_release(&buf
);
1087 string_list_clear(&cas_options
, 0);
1089 return push_update_refs_status(data
, remote_refs
, flags
);
1092 static int push_refs_with_export(struct transport
*transport
,
1093 struct ref
*remote_refs
, int flags
)
1096 struct child_process
*helper
, exporter
;
1097 struct helper_data
*data
= transport
->data
;
1098 struct string_list revlist_args
= STRING_LIST_INIT_DUP
;
1099 struct strbuf buf
= STRBUF_INIT
;
1102 die(_("remote-helper doesn't support push; refspec needed"));
1104 set_common_push_options(transport
, data
->name
, flags
);
1105 if (flags
& TRANSPORT_PUSH_FORCE
) {
1106 if (set_helper_option(transport
, "force", "true") != 0)
1107 warning(_("helper %s does not support '--force'"), data
->name
);
1110 helper
= get_helper(transport
);
1112 write_constant(helper
->in
, "export\n");
1114 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1116 struct object_id oid
;
1118 private = apply_refspecs(&data
->rs
, ref
->name
);
1119 if (private && !repo_get_oid(the_repository
, private, &oid
)) {
1120 strbuf_addf(&buf
, "^%s", private);
1121 string_list_append_nodup(&revlist_args
,
1122 strbuf_detach(&buf
, NULL
));
1123 oidcpy(&ref
->old_oid
, &oid
);
1127 if (ref
->peer_ref
) {
1128 if (strcmp(ref
->name
, ref
->peer_ref
->name
)) {
1129 if (!ref
->deletion
) {
1133 /* Follow symbolic refs (mainly for HEAD). */
1134 name
= refs_resolve_ref_unsafe(get_main_ref_store(the_repository
),
1135 ref
->peer_ref
->name
,
1136 RESOLVE_REF_READING
,
1139 if (!name
|| !(flag
& REF_ISSYMREF
))
1140 name
= ref
->peer_ref
->name
;
1142 strbuf_addf(&buf
, "%s:%s", name
, ref
->name
);
1144 strbuf_addf(&buf
, ":%s", ref
->name
);
1146 string_list_append(&revlist_args
, "--refspec");
1147 string_list_append(&revlist_args
, buf
.buf
);
1148 strbuf_release(&buf
);
1151 string_list_append(&revlist_args
, ref
->peer_ref
->name
);
1155 if (get_exporter(transport
, &exporter
, &revlist_args
))
1156 die(_("couldn't run fast-export"));
1158 string_list_clear(&revlist_args
, 1);
1160 if (finish_command(&exporter
))
1161 die(_("error while running fast-export"));
1162 if (push_update_refs_status(data
, remote_refs
, flags
))
1165 if (data
->export_marks
) {
1166 strbuf_addf(&buf
, "%s.tmp", data
->export_marks
);
1167 rename(buf
.buf
, data
->export_marks
);
1168 strbuf_release(&buf
);
1174 static int push_refs(struct transport
*transport
,
1175 struct ref
*remote_refs
, int flags
)
1177 struct helper_data
*data
= transport
->data
;
1179 if (process_connect(transport
, 1))
1180 return transport
->vtable
->push_refs(transport
, remote_refs
, flags
);
1184 _("No refs in common and none specified; doing nothing.\n"
1185 "Perhaps you should specify a branch.\n"));
1190 return push_refs_with_push(transport
, remote_refs
, flags
);
1193 return push_refs_with_export(transport
, remote_refs
, flags
);
1199 static int has_attribute(const char *attrs
, const char *attr
)
1207 const char *space
= strchrnul(attrs
, ' ');
1208 if (len
== space
- attrs
&& !strncmp(attrs
, attr
, len
))
1216 static struct ref
*get_refs_list(struct transport
*transport
, int for_push
,
1217 struct transport_ls_refs_options
*transport_options
)
1219 get_helper(transport
);
1221 if (process_connect(transport
, for_push
))
1222 return transport
->vtable
->get_refs_list(transport
, for_push
,
1225 return get_refs_list_using_list(transport
, for_push
);
1228 static struct ref
*get_refs_list_using_list(struct transport
*transport
,
1231 struct helper_data
*data
= transport
->data
;
1232 struct child_process
*helper
;
1233 struct ref
*ret
= NULL
;
1234 struct ref
**tail
= &ret
;
1236 struct strbuf buf
= STRBUF_INIT
;
1238 data
->get_refs_list_called
= 1;
1239 helper
= get_helper(transport
);
1241 if (data
->object_format
)
1242 set_helper_option(transport
, "object-format", "true");
1244 if (data
->push
&& for_push
)
1245 write_constant(helper
->in
, "list for-push\n");
1247 write_constant(helper
->in
, "list\n");
1251 if (recvline(data
, &buf
))
1256 else if (buf
.buf
[0] == ':') {
1258 if (skip_prefix(buf
.buf
, ":object-format ", &value
)) {
1259 int algo
= hash_algo_by_name(value
);
1260 if (algo
== GIT_HASH_UNKNOWN
)
1261 die(_("unsupported object format '%s'"),
1263 transport
->hash_algo
= &hash_algos
[algo
];
1268 eov
= strchr(buf
.buf
, ' ');
1270 die(_("malformed response in ref list: %s"), buf
.buf
);
1271 eon
= strchr(eov
+ 1, ' ');
1275 *tail
= alloc_ref(eov
+ 1);
1276 if (buf
.buf
[0] == '@')
1277 (*tail
)->symref
= xstrdup(buf
.buf
+ 1);
1278 else if (buf
.buf
[0] != '?')
1279 get_oid_hex_algop(buf
.buf
, &(*tail
)->old_oid
, transport
->hash_algo
);
1281 if (has_attribute(eon
+ 1, "unchanged")) {
1282 (*tail
)->status
|= REF_STATUS_UPTODATE
;
1283 if (refs_read_ref(get_main_ref_store(the_repository
), (*tail
)->name
, &(*tail
)->old_oid
) < 0)
1284 die(_("could not read ref %s"),
1288 tail
= &((*tail
)->next
);
1291 fprintf(stderr
, "Debug: Read ref listing.\n");
1292 strbuf_release(&buf
);
1294 for (posn
= ret
; posn
; posn
= posn
->next
)
1295 resolve_remote_symref(posn
, ret
);
1300 static int get_bundle_uri(struct transport
*transport
)
1302 get_helper(transport
);
1304 if (process_connect(transport
, 0))
1305 return transport
->vtable
->get_bundle_uri(transport
);
1310 static struct transport_vtable vtable
= {
1311 .set_option
= set_helper_option
,
1312 .get_refs_list
= get_refs_list
,
1313 .get_bundle_uri
= get_bundle_uri
,
1314 .fetch_refs
= fetch_refs
,
1315 .push_refs
= push_refs
,
1316 .connect
= connect_helper
,
1317 .disconnect
= release_helper
1320 int transport_helper_init(struct transport
*transport
, const char *name
)
1322 struct helper_data
*data
= xcalloc(1, sizeof(*data
));
1323 data
->name
= xstrdup(name
);
1325 transport_check_allowed(name
);
1327 if (getenv("GIT_TRANSPORT_HELPER_DEBUG"))
1330 list_objects_filter_init(&data
->transport_options
.filter_options
);
1332 transport
->data
= data
;
1333 transport
->vtable
= &vtable
;
1334 transport
->smart_options
= &(data
->transport_options
);
1339 * Linux pipes can buffer 65536 bytes at once (and most platforms can
1340 * buffer less), so attempt reads and writes with up to that size.
1342 #define BUFFERSIZE 65536
1343 /* This should be enough to hold debugging message. */
1344 #define PBUFFERSIZE 8192
1346 /* Print bidirectional transfer loop debug message. */
1347 __attribute__((format (printf
, 1, 2)))
1348 static void transfer_debug(const char *fmt
, ...)
1351 * NEEDSWORK: This function is sometimes used from multiple threads, and
1352 * we end up using debug_enabled racily. That "should not matter" since
1353 * we always write the same value, but it's still wrong. This function
1354 * is listed in .tsan-suppressions for the time being.
1358 char msgbuf
[PBUFFERSIZE
];
1359 static int debug_enabled
= -1;
1361 if (debug_enabled
< 0)
1362 debug_enabled
= getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0;
1366 va_start(args
, fmt
);
1367 vsnprintf(msgbuf
, PBUFFERSIZE
, fmt
, args
);
1369 fprintf(stderr
, "Transfer loop debugging: %s\n", msgbuf
);
1372 /* Stream state: More data may be coming in this direction. */
1373 #define SSTATE_TRANSFERRING 0
1375 * Stream state: No more data coming in this direction, flushing rest of
1378 #define SSTATE_FLUSHING 1
1379 /* Stream state: Transfer in this direction finished. */
1380 #define SSTATE_FINISHED 2
1382 #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING)
1383 #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING)
1384 #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING)
1386 /* Unidirectional transfer. */
1387 struct unidirectional_transfer
{
1392 /* Is source socket? */
1394 /* Is destination socket? */
1396 /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */
1399 char buf
[BUFFERSIZE
];
1402 /* Name of source. */
1403 const char *src_name
;
1404 /* Name of destination. */
1405 const char *dest_name
;
1408 /* Closes the target (for writing) if transfer has finished. */
1409 static void udt_close_if_finished(struct unidirectional_transfer
*t
)
1411 if (STATE_NEEDS_CLOSING(t
->state
) && !t
->bufuse
) {
1412 t
->state
= SSTATE_FINISHED
;
1413 if (t
->dest_is_sock
)
1414 shutdown(t
->dest
, SHUT_WR
);
1417 transfer_debug("Closed %s.", t
->dest_name
);
1422 * Tries to read data from source into buffer. If buffer is full,
1423 * no data is read. Returns 0 on success, -1 on error.
1425 static int udt_do_read(struct unidirectional_transfer
*t
)
1429 if (t
->bufuse
== BUFFERSIZE
)
1430 return 0; /* No space for more. */
1432 transfer_debug("%s is readable", t
->src_name
);
1433 bytes
= xread(t
->src
, t
->buf
+ t
->bufuse
, BUFFERSIZE
- t
->bufuse
);
1435 error_errno(_("read(%s) failed"), t
->src_name
);
1437 } else if (bytes
== 0) {
1438 transfer_debug("%s EOF (with %i bytes in buffer)",
1439 t
->src_name
, (int)t
->bufuse
);
1440 t
->state
= SSTATE_FLUSHING
;
1441 } else if (bytes
> 0) {
1443 transfer_debug("Read %i bytes from %s (buffer now at %i)",
1444 (int)bytes
, t
->src_name
, (int)t
->bufuse
);
1449 /* Tries to write data from buffer into destination. If buffer is empty,
1450 * no data is written. Returns 0 on success, -1 on error.
1452 static int udt_do_write(struct unidirectional_transfer
*t
)
1457 return 0; /* Nothing to write. */
1459 transfer_debug("%s is writable", t
->dest_name
);
1460 bytes
= xwrite(t
->dest
, t
->buf
, t
->bufuse
);
1462 error_errno(_("write(%s) failed"), t
->dest_name
);
1464 } else if (bytes
> 0) {
1467 memmove(t
->buf
, t
->buf
+ bytes
, t
->bufuse
);
1468 transfer_debug("Wrote %i bytes to %s (buffer now at %i)",
1469 (int)bytes
, t
->dest_name
, (int)t
->bufuse
);
1475 /* State of bidirectional transfer loop. */
1476 struct bidirectional_transfer_state
{
1477 /* Direction from program to git. */
1478 struct unidirectional_transfer ptg
;
1479 /* Direction from git to program. */
1480 struct unidirectional_transfer gtp
;
1483 static void *udt_copy_task_routine(void *udt
)
1485 struct unidirectional_transfer
*t
= (struct unidirectional_transfer
*)udt
;
1486 while (t
->state
!= SSTATE_FINISHED
) {
1487 if (STATE_NEEDS_READING(t
->state
))
1490 if (STATE_NEEDS_WRITING(t
->state
))
1491 if (udt_do_write(t
))
1493 if (STATE_NEEDS_CLOSING(t
->state
))
1494 udt_close_if_finished(t
);
1496 return udt
; /* Just some non-NULL value. */
1502 * Join thread, with appropriate errors on failure. Name is name for the
1503 * thread (for error messages). Returns 0 on success, 1 on failure.
1505 static int tloop_join(pthread_t thread
, const char *name
)
1509 err
= pthread_join(thread
, &tret
);
1511 error(_("%s thread failed"), name
);
1515 error(_("%s thread failed to join: %s"), name
, strerror(err
));
1522 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1525 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1527 pthread_t gtp_thread
;
1528 pthread_t ptg_thread
;
1531 err
= pthread_create(>p_thread
, NULL
, udt_copy_task_routine
,
1534 die(_("can't start thread for copying data: %s"), strerror(err
));
1535 err
= pthread_create(&ptg_thread
, NULL
, udt_copy_task_routine
,
1538 die(_("can't start thread for copying data: %s"), strerror(err
));
1540 ret
|= tloop_join(gtp_thread
, "Git to program copy");
1541 ret
|= tloop_join(ptg_thread
, "Program to git copy");
1546 /* Close the source and target (for writing) for transfer. */
1547 static void udt_kill_transfer(struct unidirectional_transfer
*t
)
1549 t
->state
= SSTATE_FINISHED
;
1551 * Socket read end left open isn't a disaster if nobody
1552 * attempts to read from it (mingw compat headers do not
1555 * We can't fully close the socket since otherwise gtp
1556 * task would first close the socket it sends data to
1557 * while closing the ptg file descriptors.
1559 if (!t
->src_is_sock
)
1561 if (t
->dest_is_sock
)
1562 shutdown(t
->dest
, SHUT_WR
);
1568 * Join process, with appropriate errors on failure. Name is name for the
1569 * process (for error messages). Returns 0 on success, 1 on failure.
1571 static int tloop_join(pid_t pid
, const char *name
)
1574 if (waitpid(pid
, &tret
, 0) < 0) {
1575 error_errno(_("%s process failed to wait"), name
);
1578 if (!WIFEXITED(tret
) || WEXITSTATUS(tret
)) {
1579 error(_("%s process failed"), name
);
1586 * Spawn the transfer tasks and then wait for them. Returns 0 on success,
1589 static int tloop_spawnwait_tasks(struct bidirectional_transfer_state
*s
)
1594 /* Fork thread #1: git to program. */
1597 die_errno(_("can't start thread for copying data"));
1598 else if (pid1
== 0) {
1599 udt_kill_transfer(&s
->ptg
);
1600 exit(udt_copy_task_routine(&s
->gtp
) ? 0 : 1);
1603 /* Fork thread #2: program to git. */
1606 die_errno(_("can't start thread for copying data"));
1607 else if (pid2
== 0) {
1608 udt_kill_transfer(&s
->gtp
);
1609 exit(udt_copy_task_routine(&s
->ptg
) ? 0 : 1);
1613 * Close both streams in parent as to not interfere with
1614 * end of file detection and wait for both tasks to finish.
1616 udt_kill_transfer(&s
->gtp
);
1617 udt_kill_transfer(&s
->ptg
);
1618 ret
|= tloop_join(pid1
, "Git to program copy");
1619 ret
|= tloop_join(pid2
, "Program to git copy");
1625 * Copies data from stdin to output and from input to stdout simultaneously.
1626 * Additionally filtering through given filter. If filter is NULL, uses
1629 int bidirectional_transfer_loop(int input
, int output
)
1631 struct bidirectional_transfer_state state
;
1633 /* Fill the state fields. */
1634 state
.ptg
.src
= input
;
1636 state
.ptg
.src_is_sock
= (input
== output
);
1637 state
.ptg
.dest_is_sock
= 0;
1638 state
.ptg
.state
= SSTATE_TRANSFERRING
;
1639 state
.ptg
.bufuse
= 0;
1640 state
.ptg
.src_name
= "remote input";
1641 state
.ptg
.dest_name
= "stdout";
1644 state
.gtp
.dest
= output
;
1645 state
.gtp
.src_is_sock
= 0;
1646 state
.gtp
.dest_is_sock
= (input
== output
);
1647 state
.gtp
.state
= SSTATE_TRANSFERRING
;
1648 state
.gtp
.bufuse
= 0;
1649 state
.gtp
.src_name
= "stdin";
1650 state
.gtp
.dest_name
= "remote output";
1652 return tloop_spawnwait_tasks(&state
);
1655 void reject_atomic_push(struct ref
*remote_refs
, int mirror_mode
)
1659 /* Mark other refs as failed */
1660 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
1661 if (!ref
->peer_ref
&& !mirror_mode
)
1664 switch (ref
->status
) {
1665 case REF_STATUS_NONE
:
1667 case REF_STATUS_EXPECTING_REPORT
:
1668 ref
->status
= REF_STATUS_ATOMIC_PUSH_FAILED
;
1671 break; /* do nothing */