run-command.h: include thread-utils.h instead of pthread.h
[git/git.git] / send-pack.c
CommitLineData
f5d942e1 1#include "builtin.h"
b2141fc1 2#include "config.h"
f5d942e1
NTND
3#include "commit.h"
4#include "refs.h"
cbd53a21 5#include "object-store.h"
f5d942e1
NTND
6#include "pkt-line.h"
7#include "sideband.h"
8#include "run-command.h"
9#include "remote.h"
47a59185 10#include "connect.h"
f5d942e1
NTND
11#include "send-pack.h"
12#include "quote.h"
13#include "transport.h"
14#include "version.h"
13eb4626 15#include "sha1-array.h"
a85b377d 16#include "gpg-interface.h"
30261094
DB
17#include "cache.h"
18
19int option_parse_push_signed(const struct option *opt,
20 const char *arg, int unset)
21{
22 if (unset) {
23 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
24 return 0;
25 }
26 switch (git_parse_maybe_bool(arg)) {
27 case 1:
28 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_ALWAYS;
29 return 0;
30 case 0:
31 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER;
32 return 0;
33 }
34 if (!strcasecmp("if-asked", arg)) {
35 *(int *)(opt->value) = SEND_PACK_PUSH_CERT_IF_ASKED;
36 return 0;
37 }
38 die("bad %s argument: %s", opt->long_name, arg);
39}
f5d942e1 40
246d7400 41static void feed_object(const struct object_id *oid, FILE *fh, int negative)
f5d942e1 42{
246d7400 43 if (negative && !has_sha1_file(oid->hash))
f0bca72d 44 return;
f5d942e1 45
f5d942e1 46 if (negative)
f0bca72d 47 putc('^', fh);
246d7400 48 fputs(oid_to_hex(oid), fh);
f0bca72d 49 putc('\n', fh);
f5d942e1
NTND
50}
51
52/*
53 * Make a pack stream and spit it out into file descriptor fd
54 */
910650d2 55static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struct send_pack_args *args)
f5d942e1
NTND
56{
57 /*
58 * The child becomes pack-objects --revs; we feed
59 * the revision parameters to it via its stdin and
60 * let its stdout go back to the other end.
61 */
d3180279 62 struct child_process po = CHILD_PROCESS_INIT;
f0bca72d 63 FILE *po_in;
f5d942e1 64 int i;
d1a13d3f 65 int rc;
f5d942e1 66
a923e059
RS
67 argv_array_push(&po.args, "pack-objects");
68 argv_array_push(&po.args, "--all-progress-implied");
69 argv_array_push(&po.args, "--revs");
70 argv_array_push(&po.args, "--stdout");
f5d942e1 71 if (args->use_thin_pack)
a923e059 72 argv_array_push(&po.args, "--thin");
f5d942e1 73 if (args->use_ofs_delta)
a923e059 74 argv_array_push(&po.args, "--delta-base-offset");
f5d942e1 75 if (args->quiet || !args->progress)
a923e059 76 argv_array_push(&po.args, "-q");
f5d942e1 77 if (args->progress)
a923e059 78 argv_array_push(&po.args, "--progress");
c8813487 79 if (is_repository_shallow(the_repository))
a923e059 80 argv_array_push(&po.args, "--shallow");
f5d942e1
NTND
81 po.in = -1;
82 po.out = args->stateless_rpc ? -1 : fd;
83 po.git_cmd = 1;
84 if (start_command(&po))
85 die_errno("git pack-objects failed");
86
87 /*
88 * We feed the pack-objects we just spawned with revision
89 * parameters by writing to the pipe.
90 */
f0bca72d 91 po_in = xfdopen(po.in, "w");
f5d942e1 92 for (i = 0; i < extra->nr; i++)
246d7400 93 feed_object(&extra->oid[i], po_in, 1);
f5d942e1
NTND
94
95 while (refs) {
f0bca72d 96 if (!is_null_oid(&refs->old_oid))
246d7400 97 feed_object(&refs->old_oid, po_in, 1);
f0bca72d 98 if (!is_null_oid(&refs->new_oid))
246d7400 99 feed_object(&refs->new_oid, po_in, 0);
f5d942e1
NTND
100 refs = refs->next;
101 }
102
f0bca72d
JK
103 fflush(po_in);
104 if (ferror(po_in))
105 die_errno("error writing to pack-objects");
106 fclose(po_in);
f5d942e1
NTND
107
108 if (args->stateless_rpc) {
109 char *buf = xmalloc(LARGE_PACKET_MAX);
110 while (1) {
111 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
112 if (n <= 0)
113 break;
114 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
115 }
116 free(buf);
117 close(po.out);
118 po.out = -1;
119 }
120
d1a13d3f
JK
121 rc = finish_command(&po);
122 if (rc) {
123 /*
124 * For a normal non-zero exit, we assume pack-objects wrote
125 * something useful to stderr. For death by signal, though,
126 * we should mention it to the user. The exception is SIGPIPE
64127575 127 * (141), because that's a normal occurrence if the remote end
d1a13d3f
JK
128 * hangs up (and we'll report that by trying to read the unpack
129 * status).
130 */
131 if (rc > 128 && rc != 141)
132 error("pack-objects died of signal %d", rc - 128);
f5d942e1 133 return -1;
d1a13d3f 134 }
f5d942e1
NTND
135 return 0;
136}
137
7c39df29 138static int receive_unpack_status(int in)
f5d942e1 139{
7c39df29 140 const char *line = packet_read_line(in, NULL);
bb1356dc
JS
141 if (!line)
142 return error(_("unexpected flush packet while reading remote unpack status"));
f7cd74d1 143 if (!skip_prefix(line, "unpack ", &line))
40d05d04 144 return error(_("unable to parse remote unpack status: %s"), line);
f7cd74d1 145 if (strcmp(line, "ok"))
40d05d04 146 return error(_("remote unpack failed: %s"), line);
7c39df29
JK
147 return 0;
148}
149
150static int receive_status(int in, struct ref *refs)
151{
152 struct ref *hint;
153 int ret;
154
f5d942e1 155 hint = NULL;
7c39df29 156 ret = receive_unpack_status(in);
f5d942e1
NTND
157 while (1) {
158 char *refname;
159 char *msg;
7c39df29 160 char *line = packet_read_line(in, NULL);
74543a04 161 if (!line)
f5d942e1 162 break;
59556548 163 if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
8f9e3e49 164 error("invalid ref status from remote: %s", line);
f5d942e1
NTND
165 ret = -1;
166 break;
167 }
168
f5d942e1
NTND
169 refname = line + 3;
170 msg = strchr(refname, ' ');
171 if (msg)
172 *msg++ = '\0';
173
174 /* first try searching at our hint, falling back to all refs */
175 if (hint)
176 hint = find_ref_by_name(hint, refname);
177 if (!hint)
178 hint = find_ref_by_name(refs, refname);
179 if (!hint) {
180 warning("remote reported status on unknown ref: %s",
181 refname);
182 continue;
183 }
184 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
185 warning("remote reported status on unexpected ref: %s",
186 refname);
187 continue;
188 }
189
190 if (line[0] == 'o' && line[1] == 'k')
191 hint->status = REF_STATUS_OK;
192 else {
193 hint->status = REF_STATUS_REMOTE_REJECT;
194 ret = -1;
195 }
13092a91 196 hint->remote_status = xstrdup_or_null(msg);
f5d942e1
NTND
197 /* start our next search from the next ref */
198 hint = hint->next;
199 }
200 return ret;
201}
202
203static int sideband_demux(int in, int out, void *data)
204{
205 int *fd = data, ret;
206#ifdef NO_PTHREADS
207 close(fd[1]);
208#endif
209 ret = recv_sideband("send-pack", fd[0], out);
210 close(out);
211 return ret;
212}
213
f2c681cf
NTND
214static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
215{
216 struct strbuf *sb = cb;
217 if (graft->nr_parent == -1)
7683e2e6 218 packet_buf_write(sb, "shallow %s\n", oid_to_hex(&graft->oid));
f2c681cf
NTND
219 return 0;
220}
221
16a2743c 222static void advertise_shallow_grafts_buf(struct strbuf *sb)
f2c681cf 223{
c8813487 224 if (!is_repository_shallow(the_repository))
f2c681cf
NTND
225 return;
226 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
227}
228
7582e939
SB
229#define CHECK_REF_NO_PUSH -1
230#define CHECK_REF_STATUS_REJECTED -2
231#define CHECK_REF_UPTODATE -3
232static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args)
e40671a3
JH
233{
234 if (!ref->peer_ref && !args->send_mirror)
7582e939 235 return CHECK_REF_NO_PUSH;
e40671a3
JH
236
237 /* Check for statuses set by set_ref_status_for_push() */
238 switch (ref->status) {
239 case REF_STATUS_REJECT_NONFASTFORWARD:
240 case REF_STATUS_REJECT_ALREADY_EXISTS:
241 case REF_STATUS_REJECT_FETCH_FIRST:
242 case REF_STATUS_REJECT_NEEDS_FORCE:
243 case REF_STATUS_REJECT_STALE:
244 case REF_STATUS_REJECT_NODELETE:
7582e939 245 return CHECK_REF_STATUS_REJECTED;
e40671a3 246 case REF_STATUS_UPTODATE:
7582e939 247 return CHECK_REF_UPTODATE;
e40671a3 248 default:
7582e939 249 return 0;
e40671a3
JH
250 }
251}
252
a85b377d
JH
253/*
254 * the beginning of the next line, or the end of buffer.
255 *
256 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
257 * convert many similar uses found by "git grep -A4 memchr".
258 */
259static const char *next_line(const char *line, size_t len)
260{
261 const char *nl = memchr(line, '\n', len);
262 if (!nl)
263 return line + len; /* incomplete line */
264 return nl + 1;
265}
266
20a7558f
JH
267static int generate_push_cert(struct strbuf *req_buf,
268 const struct ref *remote_refs,
269 struct send_pack_args *args,
b89363e4
JH
270 const char *cap_string,
271 const char *push_cert_nonce)
a85b377d
JH
272{
273 const struct ref *ref;
f6a4e61f 274 struct string_list_item *item;
a85b377d
JH
275 char *signing_key = xstrdup(get_signing_key());
276 const char *cp, *np;
277 struct strbuf cert = STRBUF_INIT;
278 int update_seen = 0;
279
02962d36 280 strbuf_addstr(&cert, "certificate version 0.1\n");
fb06b528
JH
281 strbuf_addf(&cert, "pusher %s ", signing_key);
282 datestamp(&cert);
283 strbuf_addch(&cert, '\n');
9be89160
JH
284 if (args->url && *args->url) {
285 char *anon_url = transport_anonymize_url(args->url);
286 strbuf_addf(&cert, "pushee %s\n", anon_url);
287 free(anon_url);
288 }
b89363e4
JH
289 if (push_cert_nonce[0])
290 strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
f6a4e61f
SB
291 if (args->push_options)
292 for_each_string_list_item(item, args->push_options)
293 strbuf_addf(&cert, "push-option %s\n", item->string);
a85b377d
JH
294 strbuf_addstr(&cert, "\n");
295
296 for (ref = remote_refs; ref; ref = ref->next) {
7582e939 297 if (check_to_send_update(ref, args) < 0)
a85b377d
JH
298 continue;
299 update_seen = 1;
300 strbuf_addf(&cert, "%s %s %s\n",
f4e54d02 301 oid_to_hex(&ref->old_oid),
302 oid_to_hex(&ref->new_oid),
a85b377d
JH
303 ref->name);
304 }
305 if (!update_seen)
306 goto free_return;
307
308 if (sign_buffer(&cert, &cert, signing_key))
309 die(_("failed to sign the push certificate"));
310
20a7558f 311 packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
a85b377d
JH
312 for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
313 np = next_line(cp, cert.buf + cert.len - cp);
314 packet_buf_write(req_buf,
315 "%.*s", (int)(np - cp), cp);
316 }
317 packet_buf_write(req_buf, "push-cert-end\n");
318
319free_return:
320 free(signing_key);
321 strbuf_release(&cert);
20a7558f 322 return update_seen;
a85b377d
JH
323}
324
4ff17f10
RS
325
326static int atomic_push_failure(struct send_pack_args *args,
327 struct ref *remote_refs,
328 struct ref *failing_ref)
329{
330 struct ref *ref;
331 /* Mark other refs as failed */
332 for (ref = remote_refs; ref; ref = ref->next) {
333 if (!ref->peer_ref && !args->send_mirror)
334 continue;
335
336 switch (ref->status) {
337 case REF_STATUS_EXPECTING_REPORT:
338 ref->status = REF_STATUS_ATOMIC_PUSH_FAILED;
339 continue;
340 default:
341 break; /* do nothing */
342 }
343 }
344 return error("atomic push failed for ref %s. status: %d\n",
345 failing_ref->name, failing_ref->status);
346}
347
afcb6ee3
JH
348#define NONCE_LEN_LIMIT 256
349
350static void reject_invalid_nonce(const char *nonce, int len)
351{
352 int i = 0;
353
354 if (NONCE_LEN_LIMIT <= len)
355 die("the receiving end asked to sign an invalid nonce <%.*s>",
356 len, nonce);
357
358 for (i = 0; i < len; i++) {
359 int ch = nonce[i] & 0xFF;
360 if (isalnum(ch) ||
361 ch == '-' || ch == '.' ||
362 ch == '/' || ch == '+' ||
363 ch == '=' || ch == '_')
364 continue;
365 die("the receiving end asked to sign an invalid nonce <%.*s>",
366 len, nonce);
367 }
368}
369
f5d942e1
NTND
370int send_pack(struct send_pack_args *args,
371 int fd[], struct child_process *conn,
372 struct ref *remote_refs,
910650d2 373 struct oid_array *extra_have)
f5d942e1
NTND
374{
375 int in = fd[0];
376 int out = fd[1];
377 struct strbuf req_buf = STRBUF_INIT;
887f3533 378 struct strbuf cap_buf = STRBUF_INIT;
f5d942e1 379 struct ref *ref;
ab2b0c90 380 int need_pack_data = 0;
f5d942e1
NTND
381 int allow_deleting_refs = 0;
382 int status_report = 0;
383 int use_sideband = 0;
384 int quiet_supported = 0;
385 int agent_supported = 0;
4ff17f10
RS
386 int use_atomic = 0;
387 int atomic_supported = 0;
f6a4e61f
SB
388 int use_push_options = 0;
389 int push_options_supported = 0;
f5d942e1
NTND
390 unsigned cmds_sent = 0;
391 int ret;
392 struct async demux;
b89363e4 393 const char *push_cert_nonce = NULL;
f5d942e1
NTND
394
395 /* Does the other end support the reporting? */
396 if (server_supports("report-status"))
397 status_report = 1;
398 if (server_supports("delete-refs"))
399 allow_deleting_refs = 1;
400 if (server_supports("ofs-delta"))
401 args->use_ofs_delta = 1;
402 if (server_supports("side-band-64k"))
403 use_sideband = 1;
404 if (server_supports("quiet"))
405 quiet_supported = 1;
406 if (server_supports("agent"))
407 agent_supported = 1;
1ba98a79
CMN
408 if (server_supports("no-thin"))
409 args->use_thin_pack = 0;
4ff17f10
RS
410 if (server_supports("atomic"))
411 atomic_supported = 1;
f6a4e61f
SB
412 if (server_supports("push-options"))
413 push_options_supported = 1;
b89363e4 414
30261094
DB
415 if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
416 int len;
b89363e4 417 push_cert_nonce = server_feature_value("push-cert", &len);
30261094
DB
418 if (push_cert_nonce) {
419 reject_invalid_nonce(push_cert_nonce, len);
420 push_cert_nonce = xmemdupz(push_cert_nonce, len);
421 } else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
b89363e4 422 die(_("the receiving end does not support --signed push"));
30261094
DB
423 } else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
424 warning(_("not sending a push certificate since the"
425 " receiving end does not support --signed"
426 " push"));
427 }
b89363e4 428 }
f5d942e1
NTND
429
430 if (!remote_refs) {
431 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
432 "Perhaps you should specify a branch such as 'master'.\n");
433 return 0;
434 }
4ff17f10 435 if (args->atomic && !atomic_supported)
c8b8f22a 436 die(_("the receiving end does not support --atomic push"));
4ff17f10
RS
437
438 use_atomic = atomic_supported && args->atomic;
f5d942e1 439
f6a4e61f
SB
440 if (args->push_options && !push_options_supported)
441 die(_("the receiving end does not support push options"));
442
443 use_push_options = push_options_supported && args->push_options;
444
887f3533
JH
445 if (status_report)
446 strbuf_addstr(&cap_buf, " report-status");
447 if (use_sideband)
448 strbuf_addstr(&cap_buf, " side-band-64k");
449 if (quiet_supported && (args->quiet || !args->progress))
450 strbuf_addstr(&cap_buf, " quiet");
4ff17f10
RS
451 if (use_atomic)
452 strbuf_addstr(&cap_buf, " atomic");
f6a4e61f
SB
453 if (use_push_options)
454 strbuf_addstr(&cap_buf, " push-options");
887f3533
JH
455 if (agent_supported)
456 strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
457
621b0599
JH
458 /*
459 * NEEDSWORK: why does delete-refs have to be so specific to
460 * send-pack machinery that set_ref_status_for_push() cannot
461 * set this bit for us???
462 */
463 for (ref = remote_refs; ref; ref = ref->next)
464 if (ref->deletion && !allow_deleting_refs)
465 ref->status = REF_STATUS_REJECT_NODELETE;
466
5dbd7676 467 if (!args->dry_run)
f2c681cf 468 advertise_shallow_grafts_buf(&req_buf);
5dbd7676 469
30261094 470 if (!args->dry_run && push_cert_nonce)
20a7558f 471 cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
b89363e4 472 cap_buf.buf, push_cert_nonce);
a85b377d 473
f5d942e1 474 /*
b783aa71
JH
475 * Clear the status for each ref and see if we need to send
476 * the pack data.
f5d942e1 477 */
f5d942e1 478 for (ref = remote_refs; ref; ref = ref->next) {
4ff17f10
RS
479 switch (check_to_send_update(ref, args)) {
480 case 0: /* no error */
481 break;
482 case CHECK_REF_STATUS_REJECTED:
483 /*
484 * When we know the server would reject a ref update if
485 * we were to send it and we're trying to send the refs
486 * atomically, abort the whole operation.
487 */
872d651f
RS
488 if (use_atomic) {
489 strbuf_release(&req_buf);
490 strbuf_release(&cap_buf);
4ff17f10 491 return atomic_push_failure(args, remote_refs, ref);
872d651f 492 }
1cf01a34 493 /* else fallthrough */
4ff17f10 494 default:
f5d942e1 495 continue;
4ff17f10 496 }
f5d942e1 497 if (!ref->deletion)
ab2b0c90 498 need_pack_data = 1;
f5d942e1 499
b783aa71 500 if (args->dry_run || !status_report)
f5d942e1 501 ref->status = REF_STATUS_OK;
b783aa71
JH
502 else
503 ref->status = REF_STATUS_EXPECTING_REPORT;
504 }
505
506 /*
507 * Finally, tell the other end!
508 */
509 for (ref = remote_refs; ref; ref = ref->next) {
510 char *old_hex, *new_hex;
511
30261094 512 if (args->dry_run || push_cert_nonce)
f5d942e1 513 continue;
f5d942e1 514
7582e939 515 if (check_to_send_update(ref, args) < 0)
b783aa71 516 continue;
f5d942e1 517
f4e54d02 518 old_hex = oid_to_hex(&ref->old_oid);
519 new_hex = oid_to_hex(&ref->new_oid);
c67072b9 520 if (!cmds_sent) {
b783aa71
JH
521 packet_buf_write(&req_buf,
522 "%s %s %s%c%s",
523 old_hex, new_hex, ref->name, 0,
524 cap_buf.buf);
c67072b9 525 cmds_sent = 1;
f5d942e1 526 } else {
b783aa71
JH
527 packet_buf_write(&req_buf, "%s %s %s",
528 old_hex, new_hex, ref->name);
f5d942e1
NTND
529 }
530 }
531
eb7b9749
BW
532 if (use_push_options) {
533 struct string_list_item *item;
534
535 packet_buf_flush(&req_buf);
536 for_each_string_list_item(item, args->push_options)
537 packet_buf_write(&req_buf, "%s", item->string);
538 }
539
f5d942e1 540 if (args->stateless_rpc) {
c8813487 541 if (!args->dry_run && (cmds_sent || is_repository_shallow(the_repository))) {
f5d942e1
NTND
542 packet_buf_flush(&req_buf);
543 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
544 }
545 } else {
cdf4fb8e 546 write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1
NTND
547 packet_flush(out);
548 }
549 strbuf_release(&req_buf);
887f3533 550 strbuf_release(&cap_buf);
f5d942e1
NTND
551
552 if (use_sideband && cmds_sent) {
553 memset(&demux, 0, sizeof(demux));
554 demux.proc = sideband_demux;
555 demux.data = fd;
556 demux.out = -1;
3e8b06d0 557 demux.isolate_sigpipe = 1;
f5d942e1
NTND
558 if (start_async(&demux))
559 die("send-pack: unable to fork off sideband demultiplexer");
560 in = demux.out;
561 }
562
ab2b0c90 563 if (need_pack_data && cmds_sent) {
f5d942e1
NTND
564 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
565 for (ref = remote_refs; ref; ref = ref->next)
566 ref->status = REF_STATUS_NONE;
567 if (args->stateless_rpc)
568 close(out);
569 if (git_connection_is_socket(conn))
570 shutdown(fd[0], SHUT_WR);
ba69f92d
JK
571
572 /*
573 * Do not even bother with the return value; we know we
574 * are failing, and just want the error() side effects.
575 */
576 if (status_report)
577 receive_unpack_status(in);
578
739cf491
JK
579 if (use_sideband) {
580 close(demux.out);
f5d942e1 581 finish_async(&demux);
739cf491 582 }
37cb1dd6 583 fd[1] = -1;
f5d942e1
NTND
584 return -1;
585 }
37cb1dd6
JL
586 if (!args->stateless_rpc)
587 /* Closed by pack_objects() via start_command() */
588 fd[1] = -1;
f5d942e1
NTND
589 }
590 if (args->stateless_rpc && cmds_sent)
591 packet_flush(out);
592
593 if (status_report && cmds_sent)
594 ret = receive_status(in, remote_refs);
595 else
596 ret = 0;
597 if (args->stateless_rpc)
598 packet_flush(out);
599
600 if (use_sideband && cmds_sent) {
739cf491 601 close(demux.out);
f5d942e1
NTND
602 if (finish_async(&demux)) {
603 error("error in sideband demultiplexer");
604 ret = -1;
605 }
f5d942e1
NTND
606 }
607
608 if (ret < 0)
609 return ret;
610
611 if (args->porcelain)
612 return 0;
613
614 for (ref = remote_refs; ref; ref = ref->next) {
615 switch (ref->status) {
616 case REF_STATUS_NONE:
617 case REF_STATUS_UPTODATE:
618 case REF_STATUS_OK:
619 break;
620 default:
621 return -1;
622 }
623 }
624 return 0;
625}