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;
89 if (start_command(&po))
90 die_errno("git pack-objects failed");
93 * We feed the pack-objects we just spawned with revision
94 * parameters by writing to the pipe.
96 po_in = xfdopen(po.in, "w");
97 for (i = 0; i < extra->nr; i++)
98 feed_object(&extra->oid[i], po_in, 1);
101 if (!is_null_oid(&refs->old_oid))
102 feed_object(&refs->old_oid, po_in, 1);
103 if (!is_null_oid(&refs->new_oid))
104 feed_object(&refs->new_oid, po_in, 0);
110 die_errno("error writing to pack-objects");
113 if (args->stateless_rpc) {
114 char *buf = xmalloc(LARGE_PACKET_MAX);
116 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
119 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
126 rc = finish_command(&po);
129 * For a normal non-zero exit, we assume pack-objects wrote
130 * something useful to stderr. For death by signal, though,
131 * we should mention it to the user. The exception is SIGPIPE
132 * (141), because that's a normal occurrence if the remote end
133 * hangs up (and we'll report that by trying to read the unpack
136 if (rc > 128 && rc != 141)
137 error("pack-objects died of signal %d", rc - 128);
143 static int receive_unpack_status(struct packet_reader *reader)
145 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
146 return error(_("unexpected flush packet while reading remote unpack status"));
147 if (!skip_prefix(reader->line, "unpack ", &reader->line))
148 return error(_("unable to parse remote unpack status: %s"), reader->line);
149 if (strcmp(reader->line, "ok"))
150 return error(_("remote unpack failed: %s"), reader->line);
154 static int receive_status(struct packet_reader *reader, struct ref *refs)
158 struct ref_push_report *report = NULL;
163 ret = receive_unpack_status(reader);
165 struct object_id old_oid, new_oid;
169 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
172 p = strchr(head, ' ');
174 error("invalid status line from remote: %s", reader->line);
180 if (!strcmp(head, "option")) {
181 const char *key, *val;
183 if (!hint || !(report || new_report)) {
185 error("'option' without a matching 'ok/ng' directive");
191 hint->report = xcalloc(1, sizeof(struct ref_push_report));
192 report = hint->report;
194 report = hint->report;
196 report = report->next;
197 report->next = xcalloc(1, sizeof(struct ref_push_report));
198 report = report->next;
203 p = strchr(key, ' ');
207 if (!strcmp(key, "refname"))
208 report->ref_name = xstrdup_or_null(val);
209 else if (!strcmp(key, "old-oid") && val &&
210 !parse_oid_hex(val, &old_oid, &val))
211 report->old_oid = oiddup(&old_oid);
212 else if (!strcmp(key, "new-oid") && val &&
213 !parse_oid_hex(val, &new_oid, &val))
214 report->new_oid = oiddup(&new_oid);
215 else if (!strcmp(key, "forced-update"))
216 report->forced_update = 1;
222 if (strcmp(head, "ok") && strcmp(head, "ng")) {
223 error("invalid ref status from remote: %s", head);
228 p = strchr(refname, ' ');
231 /* first try searching at our hint, falling back to all refs */
233 hint = find_ref_by_name(hint, refname);
235 hint = find_ref_by_name(refs, refname);
237 warning("remote reported status on unknown ref: %s",
241 if (hint->status != REF_STATUS_EXPECTING_REPORT &&
242 hint->status != REF_STATUS_OK &&
243 hint->status != REF_STATUS_REMOTE_REJECT) {
244 warning("remote reported status on unexpected ref: %s",
248 if (!strcmp(head, "ng")) {
249 hint->status = REF_STATUS_REMOTE_REJECT;
251 hint->remote_status = xstrdup(p);
253 hint->remote_status = "failed";
255 hint->status = REF_STATUS_OK;
256 hint->remote_status = xstrdup_or_null(p);
263 static int sideband_demux(int in, int out, void *data)
266 if (async_with_fork())
268 ret = recv_sideband("send-pack", fd[0], out);
273 static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
275 struct strbuf *sb = cb;
276 if (graft->nr_parent == -1)
277 packet_buf_write(sb, "shallow %s\n", oid_to_hex(&graft->oid));
281 static void advertise_shallow_grafts_buf(struct strbuf *sb)
283 if (!is_repository_shallow(the_repository))
285 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
288 #define CHECK_REF_NO_PUSH -1
289 #define CHECK_REF_STATUS_REJECTED -2
290 #define CHECK_REF_UPTODATE -3
291 static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args)
293 if (!ref->peer_ref && !args->send_mirror)
294 return CHECK_REF_NO_PUSH;
296 /* Check for statuses set by set_ref_status_for_push() */
297 switch (ref->status) {
298 case REF_STATUS_REJECT_NONFASTFORWARD:
299 case REF_STATUS_REJECT_ALREADY_EXISTS:
300 case REF_STATUS_REJECT_FETCH_FIRST:
301 case REF_STATUS_REJECT_NEEDS_FORCE:
302 case REF_STATUS_REJECT_STALE:
303 case REF_STATUS_REJECT_REMOTE_UPDATED:
304 case REF_STATUS_REJECT_NODELETE:
305 return CHECK_REF_STATUS_REJECTED;
306 case REF_STATUS_UPTODATE:
307 return CHECK_REF_UPTODATE;
310 case REF_STATUS_EXPECTING_REPORT:
311 /* already passed checks on the local side */
313 /* of course this is OK */
319 * the beginning of the next line, or the end of buffer.
321 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
322 * convert many similar uses found by "git grep -A4 memchr".
324 static const char *next_line(const char *line, size_t len)
326 const char *nl = memchr(line, '\n', len);
328 return line + len; /* incomplete line */
332 static int generate_push_cert(struct strbuf *req_buf,
333 const struct ref *remote_refs,
334 struct send_pack_args *args,
335 const char *cap_string,
336 const char *push_cert_nonce)
338 const struct ref *ref;
339 struct string_list_item *item;
340 char *signing_key = xstrdup(get_signing_key());
342 struct strbuf cert = STRBUF_INIT;
345 strbuf_addstr(&cert, "certificate version 0.1\n");
346 strbuf_addf(&cert, "pusher %s ", signing_key);
348 strbuf_addch(&cert, '\n');
349 if (args->url && *args->url) {
350 char *anon_url = transport_anonymize_url(args->url);
351 strbuf_addf(&cert, "pushee %s\n", anon_url);
354 if (push_cert_nonce[0])
355 strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
356 if (args->push_options)
357 for_each_string_list_item(item, args->push_options)
358 strbuf_addf(&cert, "push-option %s\n", item->string);
359 strbuf_addstr(&cert, "\n");
361 for (ref = remote_refs; ref; ref = ref->next) {
362 if (check_to_send_update(ref, args) < 0)
365 strbuf_addf(&cert, "%s %s %s\n",
366 oid_to_hex(&ref->old_oid),
367 oid_to_hex(&ref->new_oid),
373 if (sign_buffer(&cert, &cert, signing_key))
374 die(_("failed to sign the push certificate"));
376 packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
377 for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
378 np = next_line(cp, cert.buf + cert.len - cp);
379 packet_buf_write(req_buf,
380 "%.*s", (int)(np - cp), cp);
382 packet_buf_write(req_buf, "push-cert-end\n");
386 strbuf_release(&cert);
390 #define NONCE_LEN_LIMIT 256
392 static void reject_invalid_nonce(const char *nonce, int len)
396 if (NONCE_LEN_LIMIT <= len)
397 die("the receiving end asked to sign an invalid nonce <%.*s>",
400 for (i = 0; i < len; i++) {
401 int ch = nonce[i] & 0xFF;
403 ch == '-' || ch == '.' ||
404 ch == '/' || ch == '+' ||
405 ch == '=' || ch == '_')
407 die("the receiving end asked to sign an invalid nonce <%.*s>",
412 int send_pack(struct send_pack_args *args,
413 int fd[], struct child_process *conn,
414 struct ref *remote_refs,
415 struct oid_array *extra_have)
419 struct strbuf req_buf = STRBUF_INIT;
420 struct strbuf cap_buf = STRBUF_INIT;
422 int need_pack_data = 0;
423 int allow_deleting_refs = 0;
424 int status_report = 0;
425 int use_sideband = 0;
426 int quiet_supported = 0;
427 int agent_supported = 0;
429 int atomic_supported = 0;
430 int use_push_options = 0;
431 int push_options_supported = 0;
432 int object_format_supported = 0;
433 unsigned cmds_sent = 0;
436 const char *push_cert_nonce = NULL;
437 struct packet_reader reader;
439 /* Does the other end support the reporting? */
440 if (server_supports("report-status-v2"))
442 else if (server_supports("report-status"))
444 if (server_supports("delete-refs"))
445 allow_deleting_refs = 1;
446 if (server_supports("ofs-delta"))
447 args->use_ofs_delta = 1;
448 if (server_supports("side-band-64k"))
450 if (server_supports("quiet"))
452 if (server_supports("agent"))
454 if (server_supports("no-thin"))
455 args->use_thin_pack = 0;
456 if (server_supports("atomic"))
457 atomic_supported = 1;
458 if (server_supports("push-options"))
459 push_options_supported = 1;
461 if (!server_supports_hash(the_hash_algo->name, &object_format_supported))
462 die(_("the receiving end does not support this repository's hash algorithm"));
464 if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
466 push_cert_nonce = server_feature_value("push-cert", &len);
467 if (push_cert_nonce) {
468 reject_invalid_nonce(push_cert_nonce, len);
469 push_cert_nonce = xmemdupz(push_cert_nonce, len);
470 } else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
471 die(_("the receiving end does not support --signed push"));
472 } else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
473 warning(_("not sending a push certificate since the"
474 " receiving end does not support --signed"
480 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
481 "Perhaps you should specify a branch.\n");
484 if (args->atomic && !atomic_supported)
485 die(_("the receiving end does not support --atomic push"));
487 use_atomic = atomic_supported && args->atomic;
489 if (args->push_options && !push_options_supported)
490 die(_("the receiving end does not support push options"));
492 use_push_options = push_options_supported && args->push_options;
494 if (status_report == 1)
495 strbuf_addstr(&cap_buf, " report-status");
496 else if (status_report == 2)
497 strbuf_addstr(&cap_buf, " report-status-v2");
499 strbuf_addstr(&cap_buf, " side-band-64k");
500 if (quiet_supported && (args->quiet || !args->progress))
501 strbuf_addstr(&cap_buf, " quiet");
503 strbuf_addstr(&cap_buf, " atomic");
504 if (use_push_options)
505 strbuf_addstr(&cap_buf, " push-options");
506 if (object_format_supported)
507 strbuf_addf(&cap_buf, " object-format=%s", the_hash_algo->name);
509 strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
512 * NEEDSWORK: why does delete-refs have to be so specific to
513 * send-pack machinery that set_ref_status_for_push() cannot
514 * set this bit for us???
516 for (ref = remote_refs; ref; ref = ref->next)
517 if (ref->deletion && !allow_deleting_refs)
518 ref->status = REF_STATUS_REJECT_NODELETE;
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 advertise_shallow_grafts_buf(&req_buf);
559 * Finally, tell the other end!
561 if (!args->dry_run && push_cert_nonce)
562 cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
563 cap_buf.buf, push_cert_nonce);
564 else if (!args->dry_run)
565 for (ref = remote_refs; ref; ref = ref->next) {
566 char *old_hex, *new_hex;
568 if (check_to_send_update(ref, args) < 0)
571 old_hex = oid_to_hex(&ref->old_oid);
572 new_hex = oid_to_hex(&ref->new_oid);
574 packet_buf_write(&req_buf,
576 old_hex, new_hex, ref->name, 0,
580 packet_buf_write(&req_buf, "%s %s %s",
581 old_hex, new_hex, ref->name);
585 if (use_push_options) {
586 struct string_list_item *item;
588 packet_buf_flush(&req_buf);
589 for_each_string_list_item(item, args->push_options)
590 packet_buf_write(&req_buf, "%s", item->string);
593 if (args->stateless_rpc) {
594 if (!args->dry_run && (cmds_sent || is_repository_shallow(the_repository))) {
595 packet_buf_flush(&req_buf);
596 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
599 write_or_die(out, req_buf.buf, req_buf.len);
602 strbuf_release(&req_buf);
603 strbuf_release(&cap_buf);
605 if (use_sideband && cmds_sent) {
606 memset(&demux, 0, sizeof(demux));
607 demux.proc = sideband_demux;
610 demux.isolate_sigpipe = 1;
611 if (start_async(&demux))
612 die("send-pack: unable to fork off sideband demultiplexer");
616 packet_reader_init(&reader, in, NULL, 0,
617 PACKET_READ_CHOMP_NEWLINE |
618 PACKET_READ_DIE_ON_ERR_PACKET);
620 if (need_pack_data && cmds_sent) {
621 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
622 if (args->stateless_rpc)
624 if (git_connection_is_socket(conn))
625 shutdown(fd[0], SHUT_WR);
628 * Do not even bother with the return value; we know we
629 * are failing, and just want the error() side effects,
630 * as well as marking refs with their remote status (if
634 receive_status(&reader, remote_refs);
638 finish_async(&demux);
643 if (!args->stateless_rpc)
644 /* Closed by pack_objects() via start_command() */
647 if (args->stateless_rpc && cmds_sent)
650 if (status_report && cmds_sent)
651 ret = receive_status(&reader, remote_refs);
654 if (args->stateless_rpc)
657 if (use_sideband && cmds_sent) {
659 if (finish_async(&demux)) {
660 error("error in sideband demultiplexer");
671 for (ref = remote_refs; ref; ref = ref->next) {
672 switch (ref->status) {
673 case REF_STATUS_NONE:
674 case REF_STATUS_UPTODATE: