5 #include "object-store.h"
8 #include "run-command.h"
11 #include "send-pack.h"
13 #include "transport.h"
15 #include "oid-array.h"
16 #include "gpg-interface.h"
20 int option_parse_push_signed(const struct option *opt,
21 const char *arg, int unset)
24 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
27 switch (git_parse_maybe_bool(arg)) {
29 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_ALWAYS;
32 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
35 if (!strcasecmp("if-asked", arg)) {
36 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_IF_ASKED;
39 die("bad %s argument: %s", opt->long_name, arg);
42 static void feed_object(const struct object_id *oid, FILE *fh, int negative)
45 !has_object_file_with_flags(oid,
46 OBJECT_INFO_SKIP_FETCH_OBJECT |
52 fputs(oid_to_hex(oid), fh);
57 * Make a pack stream and spit it out into file descriptor fd
59 static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struct send_pack_args *args)
62 * The child becomes pack-objects --revs; we feed
63 * the revision parameters to it via its stdin and
64 * let its stdout go back to the other end.
66 struct child_process po = CHILD_PROCESS_INIT;
71 strvec_push(&po.args, "pack-objects");
72 strvec_push(&po.args, "--all-progress-implied");
73 strvec_push(&po.args, "--revs");
74 strvec_push(&po.args, "--stdout");
75 if (args->use_thin_pack)
76 strvec_push(&po.args, "--thin");
77 if (args->use_ofs_delta)
78 strvec_push(&po.args, "--delta-base-offset");
79 if (args->quiet || !args->progress)
80 strvec_push(&po.args, "-q");
82 strvec_push(&po.args, "--progress");
83 if (is_repository_shallow(the_repository))
84 strvec_push(&po.args, "--shallow");
86 po.out = args->stateless_rpc ? -1 : fd;
88 if (start_command(&po))
89 die_errno("git pack-objects failed");
92 * We feed the pack-objects we just spawned with revision
93 * parameters by writing to the pipe.
95 po_in = xfdopen(po.in, "w");
96 for (i = 0; i < extra->nr; i++)
97 feed_object(&extra->oid[i], po_in, 1);
100 if (!is_null_oid(&refs->old_oid))
101 feed_object(&refs->old_oid, po_in, 1);
102 if (!is_null_oid(&refs->new_oid))
103 feed_object(&refs->new_oid, po_in, 0);
109 die_errno("error writing to pack-objects");
112 if (args->stateless_rpc) {
113 char *buf = xmalloc(LARGE_PACKET_MAX);
115 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
118 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
125 rc = finish_command(&po);
128 * For a normal non-zero exit, we assume pack-objects wrote
129 * something useful to stderr. For death by signal, though,
130 * we should mention it to the user. The exception is SIGPIPE
131 * (141), because that's a normal occurrence if the remote end
132 * hangs up (and we'll report that by trying to read the unpack
135 if (rc > 128 && rc != 141)
136 error("pack-objects died of signal %d", rc - 128);
142 static int receive_unpack_status(struct packet_reader *reader)
144 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
145 return error(_("unexpected flush packet while reading remote unpack status"));
146 if (!skip_prefix(reader->line, "unpack ", &reader->line))
147 return error(_("unable to parse remote unpack status: %s"), reader->line);
148 if (strcmp(reader->line, "ok"))
149 return error(_("remote unpack failed: %s"), reader->line);
153 static int receive_status(struct packet_reader *reader, struct ref *refs)
157 struct ref_push_report *report = NULL;
162 ret = receive_unpack_status(reader);
164 struct object_id old_oid, new_oid;
168 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
171 p = strchr(head, ' ');
173 error("invalid status line from remote: %s", reader->line);
179 if (!strcmp(head, "option")) {
180 const char *key, *val;
182 if (!hint || !(report || new_report)) {
184 error("'option' without a matching 'ok/ng' directive");
190 hint->report = xcalloc(1, sizeof(struct ref_push_report));
191 report = hint->report;
193 report = hint->report;
195 report = report->next;
196 report->next = xcalloc(1, sizeof(struct ref_push_report));
197 report = report->next;
202 p = strchr(key, ' ');
206 if (!strcmp(key, "refname"))
207 report->ref_name = xstrdup_or_null(val);
208 else if (!strcmp(key, "old-oid") && val &&
209 !parse_oid_hex(val, &old_oid, &val))
210 report->old_oid = oiddup(&old_oid);
211 else if (!strcmp(key, "new-oid") && val &&
212 !parse_oid_hex(val, &new_oid, &val))
213 report->new_oid = oiddup(&new_oid);
214 else if (!strcmp(key, "forced-update"))
215 report->forced_update = 1;
221 if (strcmp(head, "ok") && strcmp(head, "ng")) {
222 error("invalid ref status from remote: %s", head);
227 p = strchr(refname, ' ');
230 /* first try searching at our hint, falling back to all refs */
232 hint = find_ref_by_name(hint, refname);
234 hint = find_ref_by_name(refs, refname);
236 warning("remote reported status on unknown ref: %s",
240 if (hint->status != REF_STATUS_EXPECTING_REPORT &&
241 hint->status != REF_STATUS_OK &&
242 hint->status != REF_STATUS_REMOTE_REJECT) {
243 warning("remote reported status on unexpected ref: %s",
247 if (!strcmp(head, "ng")) {
248 hint->status = REF_STATUS_REMOTE_REJECT;
250 hint->remote_status = xstrdup(p);
252 hint->remote_status = "failed";
254 hint->status = REF_STATUS_OK;
255 hint->remote_status = xstrdup_or_null(p);
262 static int sideband_demux(int in, int out, void *data)
265 if (async_with_fork())
267 ret = recv_sideband("send-pack", fd[0], out);
272 static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
274 struct strbuf *sb = cb;
275 if (graft->nr_parent == -1)
276 packet_buf_write(sb, "shallow %s\n", oid_to_hex(&graft->oid));
280 static void advertise_shallow_grafts_buf(struct strbuf *sb)
282 if (!is_repository_shallow(the_repository))
284 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
287 #define CHECK_REF_NO_PUSH -1
288 #define CHECK_REF_STATUS_REJECTED -2
289 #define CHECK_REF_UPTODATE -3
290 static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args)
292 if (!ref->peer_ref && !args->send_mirror)
293 return CHECK_REF_NO_PUSH;
295 /* Check for statuses set by set_ref_status_for_push() */
296 switch (ref->status) {
297 case REF_STATUS_REJECT_NONFASTFORWARD:
298 case REF_STATUS_REJECT_ALREADY_EXISTS:
299 case REF_STATUS_REJECT_FETCH_FIRST:
300 case REF_STATUS_REJECT_NEEDS_FORCE:
301 case REF_STATUS_REJECT_STALE:
302 case REF_STATUS_REJECT_NODELETE:
303 return CHECK_REF_STATUS_REJECTED;
304 case REF_STATUS_UPTODATE:
305 return CHECK_REF_UPTODATE;
312 * the beginning of the next line, or the end of buffer.
314 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
315 * convert many similar uses found by "git grep -A4 memchr".
317 static const char *next_line(const char *line, size_t len)
319 const char *nl = memchr(line, '\n', len);
321 return line + len; /* incomplete line */
325 static int generate_push_cert(struct strbuf *req_buf,
326 const struct ref *remote_refs,
327 struct send_pack_args *args,
328 const char *cap_string,
329 const char *push_cert_nonce)
331 const struct ref *ref;
332 struct string_list_item *item;
333 char *signing_key = xstrdup(get_signing_key());
335 struct strbuf cert = STRBUF_INIT;
338 strbuf_addstr(&cert, "certificate version 0.1\n");
339 strbuf_addf(&cert, "pusher %s ", signing_key);
341 strbuf_addch(&cert, '\n');
342 if (args->url && *args->url) {
343 char *anon_url = transport_anonymize_url(args->url);
344 strbuf_addf(&cert, "pushee %s\n", anon_url);
347 if (push_cert_nonce[0])
348 strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
349 if (args->push_options)
350 for_each_string_list_item(item, args->push_options)
351 strbuf_addf(&cert, "push-option %s\n", item->string);
352 strbuf_addstr(&cert, "\n");
354 for (ref = remote_refs; ref; ref = ref->next) {
355 if (check_to_send_update(ref, args) < 0)
358 strbuf_addf(&cert, "%s %s %s\n",
359 oid_to_hex(&ref->old_oid),
360 oid_to_hex(&ref->new_oid),
366 if (sign_buffer(&cert, &cert, signing_key))
367 die(_("failed to sign the push certificate"));
369 packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
370 for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
371 np = next_line(cp, cert.buf + cert.len - cp);
372 packet_buf_write(req_buf,
373 "%.*s", (int)(np - cp), cp);
375 packet_buf_write(req_buf, "push-cert-end\n");
379 strbuf_release(&cert);
383 #define NONCE_LEN_LIMIT 256
385 static void reject_invalid_nonce(const char *nonce, int len)
389 if (NONCE_LEN_LIMIT <= len)
390 die("the receiving end asked to sign an invalid nonce <%.*s>",
393 for (i = 0; i < len; i++) {
394 int ch = nonce[i] & 0xFF;
396 ch == '-' || ch == '.' ||
397 ch == '/' || ch == '+' ||
398 ch == '=' || ch == '_')
400 die("the receiving end asked to sign an invalid nonce <%.*s>",
405 int send_pack(struct send_pack_args *args,
406 int fd[], struct child_process *conn,
407 struct ref *remote_refs,
408 struct oid_array *extra_have)
412 struct strbuf req_buf = STRBUF_INIT;
413 struct strbuf cap_buf = STRBUF_INIT;
415 int need_pack_data = 0;
416 int allow_deleting_refs = 0;
417 int status_report = 0;
418 int use_sideband = 0;
419 int quiet_supported = 0;
420 int agent_supported = 0;
422 int atomic_supported = 0;
423 int use_push_options = 0;
424 int push_options_supported = 0;
425 int object_format_supported = 0;
426 unsigned cmds_sent = 0;
429 const char *push_cert_nonce = NULL;
430 struct packet_reader reader;
432 /* Does the other end support the reporting? */
433 if (server_supports("report-status-v2"))
435 else if (server_supports("report-status"))
437 if (server_supports("delete-refs"))
438 allow_deleting_refs = 1;
439 if (server_supports("ofs-delta"))
440 args->use_ofs_delta = 1;
441 if (server_supports("side-band-64k"))
443 if (server_supports("quiet"))
445 if (server_supports("agent"))
447 if (server_supports("no-thin"))
448 args->use_thin_pack = 0;
449 if (server_supports("atomic"))
450 atomic_supported = 1;
451 if (server_supports("push-options"))
452 push_options_supported = 1;
454 if (!server_supports_hash(the_hash_algo->name, &object_format_supported))
455 die(_("the receiving end does not support this repository's hash algorithm"));
457 if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
459 push_cert_nonce = server_feature_value("push-cert", &len);
460 if (push_cert_nonce) {
461 reject_invalid_nonce(push_cert_nonce, len);
462 push_cert_nonce = xmemdupz(push_cert_nonce, len);
463 } else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
464 die(_("the receiving end does not support --signed push"));
465 } else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
466 warning(_("not sending a push certificate since the"
467 " receiving end does not support --signed"
473 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
474 "Perhaps you should specify a branch.\n");
477 if (args->atomic && !atomic_supported)
478 die(_("the receiving end does not support --atomic push"));
480 use_atomic = atomic_supported && args->atomic;
482 if (args->push_options && !push_options_supported)
483 die(_("the receiving end does not support push options"));
485 use_push_options = push_options_supported && args->push_options;
487 if (status_report == 1)
488 strbuf_addstr(&cap_buf, " report-status");
489 else if (status_report == 2)
490 strbuf_addstr(&cap_buf, " report-status-v2");
492 strbuf_addstr(&cap_buf, " side-band-64k");
493 if (quiet_supported && (args->quiet || !args->progress))
494 strbuf_addstr(&cap_buf, " quiet");
496 strbuf_addstr(&cap_buf, " atomic");
497 if (use_push_options)
498 strbuf_addstr(&cap_buf, " push-options");
499 if (object_format_supported)
500 strbuf_addf(&cap_buf, " object-format=%s", the_hash_algo->name);
502 strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
505 * NEEDSWORK: why does delete-refs have to be so specific to
506 * send-pack machinery that set_ref_status_for_push() cannot
507 * set this bit for us???
509 for (ref = remote_refs; ref; ref = ref->next)
510 if (ref->deletion && !allow_deleting_refs)
511 ref->status = REF_STATUS_REJECT_NODELETE;
514 advertise_shallow_grafts_buf(&req_buf);
516 if (!args->dry_run && push_cert_nonce)
517 cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
518 cap_buf.buf, push_cert_nonce);
521 * Clear the status for each ref and see if we need to send
524 for (ref = remote_refs; ref; ref = ref->next) {
525 switch (check_to_send_update(ref, args)) {
526 case 0: /* no error */
528 case CHECK_REF_STATUS_REJECTED:
530 * When we know the server would reject a ref update if
531 * we were to send it and we're trying to send the refs
532 * atomically, abort the whole operation.
535 strbuf_release(&req_buf);
536 strbuf_release(&cap_buf);
537 reject_atomic_push(remote_refs, args->send_mirror);
538 error("atomic push failed for ref %s. status: %d\n",
539 ref->name, ref->status);
540 return args->porcelain ? 0 : -1;
542 /* else fallthrough */
549 if (args->dry_run || !status_report)
550 ref->status = REF_STATUS_OK;
552 ref->status = REF_STATUS_EXPECTING_REPORT;
556 * Finally, tell the other end!
558 for (ref = remote_refs; ref; ref = ref->next) {
559 char *old_hex, *new_hex;
561 if (args->dry_run || push_cert_nonce)
564 if (check_to_send_update(ref, args) < 0)
567 old_hex = oid_to_hex(&ref->old_oid);
568 new_hex = oid_to_hex(&ref->new_oid);
570 packet_buf_write(&req_buf,
572 old_hex, new_hex, ref->name, 0,
576 packet_buf_write(&req_buf, "%s %s %s",
577 old_hex, new_hex, ref->name);
581 if (use_push_options) {
582 struct string_list_item *item;
584 packet_buf_flush(&req_buf);
585 for_each_string_list_item(item, args->push_options)
586 packet_buf_write(&req_buf, "%s", item->string);
589 if (args->stateless_rpc) {
590 if (!args->dry_run && (cmds_sent || is_repository_shallow(the_repository))) {
591 packet_buf_flush(&req_buf);
592 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
595 write_or_die(out, req_buf.buf, req_buf.len);
598 strbuf_release(&req_buf);
599 strbuf_release(&cap_buf);
601 if (use_sideband && cmds_sent) {
602 memset(&demux, 0, sizeof(demux));
603 demux.proc = sideband_demux;
606 demux.isolate_sigpipe = 1;
607 if (start_async(&demux))
608 die("send-pack: unable to fork off sideband demultiplexer");
612 packet_reader_init(&reader, in, NULL, 0,
613 PACKET_READ_CHOMP_NEWLINE |
614 PACKET_READ_DIE_ON_ERR_PACKET);
616 if (need_pack_data && cmds_sent) {
617 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
618 if (args->stateless_rpc)
620 if (git_connection_is_socket(conn))
621 shutdown(fd[0], SHUT_WR);
624 * Do not even bother with the return value; we know we
625 * are failing, and just want the error() side effects,
626 * as well as marking refs with their remote status (if
630 receive_status(&reader, remote_refs);
634 finish_async(&demux);
639 if (!args->stateless_rpc)
640 /* Closed by pack_objects() via start_command() */
643 if (args->stateless_rpc && cmds_sent)
646 if (status_report && cmds_sent)
647 ret = receive_status(&reader, remote_refs);
650 if (args->stateless_rpc)
653 if (use_sideband && cmds_sent) {
655 if (finish_async(&demux)) {
656 error("error in sideband demultiplexer");
667 for (ref = remote_refs; ref; ref = ref->next) {
668 switch (ref->status) {
669 case REF_STATUS_NONE:
670 case REF_STATUS_UPTODATE: