transport-helper: fix typo in error message when --signed is not supported
[git/git.git] / send-pack.c
CommitLineData
f5d942e1
NTND
1#include "builtin.h"
2#include "commit.h"
3#include "refs.h"
4#include "pkt-line.h"
5#include "sideband.h"
6#include "run-command.h"
7#include "remote.h"
47a59185 8#include "connect.h"
f5d942e1
NTND
9#include "send-pack.h"
10#include "quote.h"
11#include "transport.h"
12#include "version.h"
13eb4626 13#include "sha1-array.h"
a85b377d 14#include "gpg-interface.h"
f5d942e1
NTND
15
16static int feed_object(const unsigned char *sha1, int fd, int negative)
17{
18 char buf[42];
19
20 if (negative && !has_sha1_file(sha1))
21 return 1;
22
23 memcpy(buf + negative, sha1_to_hex(sha1), 40);
24 if (negative)
25 buf[0] = '^';
26 buf[40 + negative] = '\n';
27 return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
28}
29
30/*
31 * Make a pack stream and spit it out into file descriptor fd
32 */
13eb4626 33static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
f5d942e1
NTND
34{
35 /*
36 * The child becomes pack-objects --revs; we feed
37 * the revision parameters to it via its stdin and
38 * let its stdout go back to the other end.
39 */
40 const char *argv[] = {
41 "pack-objects",
42 "--all-progress-implied",
43 "--revs",
44 "--stdout",
45 NULL,
46 NULL,
47 NULL,
48 NULL,
49 NULL,
50 };
51 struct child_process po;
52 int i;
53
54 i = 4;
55 if (args->use_thin_pack)
56 argv[i++] = "--thin";
57 if (args->use_ofs_delta)
58 argv[i++] = "--delta-base-offset";
59 if (args->quiet || !args->progress)
60 argv[i++] = "-q";
61 if (args->progress)
62 argv[i++] = "--progress";
63 memset(&po, 0, sizeof(po));
64 po.argv = argv;
65 po.in = -1;
66 po.out = args->stateless_rpc ? -1 : fd;
67 po.git_cmd = 1;
68 if (start_command(&po))
69 die_errno("git pack-objects failed");
70
71 /*
72 * We feed the pack-objects we just spawned with revision
73 * parameters by writing to the pipe.
74 */
75 for (i = 0; i < extra->nr; i++)
13eb4626 76 if (!feed_object(extra->sha1[i], po.in, 1))
f5d942e1
NTND
77 break;
78
79 while (refs) {
80 if (!is_null_sha1(refs->old_sha1) &&
81 !feed_object(refs->old_sha1, po.in, 1))
82 break;
83 if (!is_null_sha1(refs->new_sha1) &&
84 !feed_object(refs->new_sha1, po.in, 0))
85 break;
86 refs = refs->next;
87 }
88
89 close(po.in);
90
91 if (args->stateless_rpc) {
92 char *buf = xmalloc(LARGE_PACKET_MAX);
93 while (1) {
94 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
95 if (n <= 0)
96 break;
97 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
98 }
99 free(buf);
100 close(po.out);
101 po.out = -1;
102 }
103
104 if (finish_command(&po))
105 return -1;
106 return 0;
107}
108
109static int receive_status(int in, struct ref *refs)
110{
111 struct ref *hint;
f5d942e1 112 int ret = 0;
74543a04 113 char *line = packet_read_line(in, NULL);
59556548 114 if (!starts_with(line, "unpack "))
f5d942e1 115 return error("did not receive remote status");
819b929d 116 if (strcmp(line, "unpack ok")) {
f5d942e1
NTND
117 error("unpack failed: %s", line + 7);
118 ret = -1;
119 }
120 hint = NULL;
121 while (1) {
122 char *refname;
123 char *msg;
74543a04
JK
124 line = packet_read_line(in, NULL);
125 if (!line)
f5d942e1 126 break;
59556548 127 if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
8f9e3e49 128 error("invalid ref status from remote: %s", line);
f5d942e1
NTND
129 ret = -1;
130 break;
131 }
132
f5d942e1
NTND
133 refname = line + 3;
134 msg = strchr(refname, ' ');
135 if (msg)
136 *msg++ = '\0';
137
138 /* first try searching at our hint, falling back to all refs */
139 if (hint)
140 hint = find_ref_by_name(hint, refname);
141 if (!hint)
142 hint = find_ref_by_name(refs, refname);
143 if (!hint) {
144 warning("remote reported status on unknown ref: %s",
145 refname);
146 continue;
147 }
148 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
149 warning("remote reported status on unexpected ref: %s",
150 refname);
151 continue;
152 }
153
154 if (line[0] == 'o' && line[1] == 'k')
155 hint->status = REF_STATUS_OK;
156 else {
157 hint->status = REF_STATUS_REMOTE_REJECT;
158 ret = -1;
159 }
160 if (msg)
161 hint->remote_status = xstrdup(msg);
162 /* start our next search from the next ref */
163 hint = hint->next;
164 }
165 return ret;
166}
167
168static int sideband_demux(int in, int out, void *data)
169{
170 int *fd = data, ret;
171#ifdef NO_PTHREADS
172 close(fd[1]);
173#endif
174 ret = recv_sideband("send-pack", fd[0], out);
175 close(out);
176 return ret;
177}
178
f2c681cf
NTND
179static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
180{
181 struct strbuf *sb = cb;
182 if (graft->nr_parent == -1)
183 packet_buf_write(sb, "shallow %s\n", sha1_to_hex(graft->sha1));
184 return 0;
185}
186
16a2743c 187static void advertise_shallow_grafts_buf(struct strbuf *sb)
f2c681cf
NTND
188{
189 if (!is_repository_shallow())
190 return;
191 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
192}
193
e40671a3
JH
194static int ref_update_to_be_sent(const struct ref *ref, const struct send_pack_args *args)
195{
196 if (!ref->peer_ref && !args->send_mirror)
197 return 0;
198
199 /* Check for statuses set by set_ref_status_for_push() */
200 switch (ref->status) {
201 case REF_STATUS_REJECT_NONFASTFORWARD:
202 case REF_STATUS_REJECT_ALREADY_EXISTS:
203 case REF_STATUS_REJECT_FETCH_FIRST:
204 case REF_STATUS_REJECT_NEEDS_FORCE:
205 case REF_STATUS_REJECT_STALE:
206 case REF_STATUS_REJECT_NODELETE:
207 case REF_STATUS_UPTODATE:
208 return 0;
209 default:
210 return 1;
211 }
212}
213
a85b377d
JH
214/*
215 * the beginning of the next line, or the end of buffer.
216 *
217 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
218 * convert many similar uses found by "git grep -A4 memchr".
219 */
220static const char *next_line(const char *line, size_t len)
221{
222 const char *nl = memchr(line, '\n', len);
223 if (!nl)
224 return line + len; /* incomplete line */
225 return nl + 1;
226}
227
20a7558f
JH
228static int generate_push_cert(struct strbuf *req_buf,
229 const struct ref *remote_refs,
230 struct send_pack_args *args,
b89363e4
JH
231 const char *cap_string,
232 const char *push_cert_nonce)
a85b377d
JH
233{
234 const struct ref *ref;
235 char stamp[60];
236 char *signing_key = xstrdup(get_signing_key());
237 const char *cp, *np;
238 struct strbuf cert = STRBUF_INIT;
239 int update_seen = 0;
240
241 datestamp(stamp, sizeof(stamp));
242 strbuf_addf(&cert, "certificate version 0.1\n");
243 strbuf_addf(&cert, "pusher %s %s\n", signing_key, stamp);
9be89160
JH
244 if (args->url && *args->url) {
245 char *anon_url = transport_anonymize_url(args->url);
246 strbuf_addf(&cert, "pushee %s\n", anon_url);
247 free(anon_url);
248 }
b89363e4
JH
249 if (push_cert_nonce[0])
250 strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
a85b377d
JH
251 strbuf_addstr(&cert, "\n");
252
253 for (ref = remote_refs; ref; ref = ref->next) {
254 if (!ref_update_to_be_sent(ref, args))
255 continue;
256 update_seen = 1;
257 strbuf_addf(&cert, "%s %s %s\n",
258 sha1_to_hex(ref->old_sha1),
259 sha1_to_hex(ref->new_sha1),
260 ref->name);
261 }
262 if (!update_seen)
263 goto free_return;
264
265 if (sign_buffer(&cert, &cert, signing_key))
266 die(_("failed to sign the push certificate"));
267
20a7558f 268 packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
a85b377d
JH
269 for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
270 np = next_line(cp, cert.buf + cert.len - cp);
271 packet_buf_write(req_buf,
272 "%.*s", (int)(np - cp), cp);
273 }
274 packet_buf_write(req_buf, "push-cert-end\n");
275
276free_return:
277 free(signing_key);
278 strbuf_release(&cert);
20a7558f 279 return update_seen;
a85b377d
JH
280}
281
f5d942e1
NTND
282int send_pack(struct send_pack_args *args,
283 int fd[], struct child_process *conn,
284 struct ref *remote_refs,
13eb4626 285 struct sha1_array *extra_have)
f5d942e1
NTND
286{
287 int in = fd[0];
288 int out = fd[1];
289 struct strbuf req_buf = STRBUF_INIT;
887f3533 290 struct strbuf cap_buf = STRBUF_INIT;
f5d942e1 291 struct ref *ref;
ab2b0c90 292 int need_pack_data = 0;
f5d942e1
NTND
293 int allow_deleting_refs = 0;
294 int status_report = 0;
295 int use_sideband = 0;
296 int quiet_supported = 0;
297 int agent_supported = 0;
298 unsigned cmds_sent = 0;
299 int ret;
300 struct async demux;
b89363e4 301 const char *push_cert_nonce = NULL;
f5d942e1
NTND
302
303 /* Does the other end support the reporting? */
304 if (server_supports("report-status"))
305 status_report = 1;
306 if (server_supports("delete-refs"))
307 allow_deleting_refs = 1;
308 if (server_supports("ofs-delta"))
309 args->use_ofs_delta = 1;
310 if (server_supports("side-band-64k"))
311 use_sideband = 1;
312 if (server_supports("quiet"))
313 quiet_supported = 1;
314 if (server_supports("agent"))
315 agent_supported = 1;
1ba98a79
CMN
316 if (server_supports("no-thin"))
317 args->use_thin_pack = 0;
b89363e4
JH
318 if (args->push_cert) {
319 int len;
320
321 push_cert_nonce = server_feature_value("push-cert", &len);
322 if (!push_cert_nonce)
323 die(_("the receiving end does not support --signed push"));
324 push_cert_nonce = xmemdupz(push_cert_nonce, len);
325 }
f5d942e1
NTND
326
327 if (!remote_refs) {
328 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
329 "Perhaps you should specify a branch such as 'master'.\n");
330 return 0;
331 }
332
887f3533
JH
333 if (status_report)
334 strbuf_addstr(&cap_buf, " report-status");
335 if (use_sideband)
336 strbuf_addstr(&cap_buf, " side-band-64k");
337 if (quiet_supported && (args->quiet || !args->progress))
338 strbuf_addstr(&cap_buf, " quiet");
339 if (agent_supported)
340 strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
341
621b0599
JH
342 /*
343 * NEEDSWORK: why does delete-refs have to be so specific to
344 * send-pack machinery that set_ref_status_for_push() cannot
345 * set this bit for us???
346 */
347 for (ref = remote_refs; ref; ref = ref->next)
348 if (ref->deletion && !allow_deleting_refs)
349 ref->status = REF_STATUS_REJECT_NODELETE;
350
5dbd7676 351 if (!args->dry_run)
f2c681cf 352 advertise_shallow_grafts_buf(&req_buf);
5dbd7676 353
a85b377d 354 if (!args->dry_run && args->push_cert)
20a7558f 355 cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
b89363e4 356 cap_buf.buf, push_cert_nonce);
a85b377d 357
f5d942e1 358 /*
b783aa71
JH
359 * Clear the status for each ref and see if we need to send
360 * the pack data.
f5d942e1 361 */
f5d942e1 362 for (ref = remote_refs; ref; ref = ref->next) {
e40671a3 363 if (!ref_update_to_be_sent(ref, args))
f5d942e1
NTND
364 continue;
365
f5d942e1 366 if (!ref->deletion)
ab2b0c90 367 need_pack_data = 1;
f5d942e1 368
b783aa71 369 if (args->dry_run || !status_report)
f5d942e1 370 ref->status = REF_STATUS_OK;
b783aa71
JH
371 else
372 ref->status = REF_STATUS_EXPECTING_REPORT;
373 }
374
375 /*
376 * Finally, tell the other end!
377 */
378 for (ref = remote_refs; ref; ref = ref->next) {
379 char *old_hex, *new_hex;
380
4adf569d 381 if (args->dry_run || args->push_cert)
b783aa71
JH
382 continue;
383
384 if (!ref_update_to_be_sent(ref, args))
385 continue;
386
387 old_hex = sha1_to_hex(ref->old_sha1);
388 new_hex = sha1_to_hex(ref->new_sha1);
c67072b9 389 if (!cmds_sent) {
b783aa71
JH
390 packet_buf_write(&req_buf,
391 "%s %s %s%c%s",
392 old_hex, new_hex, ref->name, 0,
393 cap_buf.buf);
c67072b9
JH
394 cmds_sent = 1;
395 } else {
b783aa71
JH
396 packet_buf_write(&req_buf, "%s %s %s",
397 old_hex, new_hex, ref->name);
c67072b9 398 }
f5d942e1
NTND
399 }
400
401 if (args->stateless_rpc) {
f2c681cf 402 if (!args->dry_run && (cmds_sent || is_repository_shallow())) {
f5d942e1
NTND
403 packet_buf_flush(&req_buf);
404 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
405 }
406 } else {
cdf4fb8e 407 write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1
NTND
408 packet_flush(out);
409 }
410 strbuf_release(&req_buf);
887f3533 411 strbuf_release(&cap_buf);
f5d942e1
NTND
412
413 if (use_sideband && cmds_sent) {
414 memset(&demux, 0, sizeof(demux));
415 demux.proc = sideband_demux;
416 demux.data = fd;
417 demux.out = -1;
418 if (start_async(&demux))
419 die("send-pack: unable to fork off sideband demultiplexer");
420 in = demux.out;
421 }
422
ab2b0c90 423 if (need_pack_data && cmds_sent) {
f5d942e1
NTND
424 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
425 for (ref = remote_refs; ref; ref = ref->next)
426 ref->status = REF_STATUS_NONE;
427 if (args->stateless_rpc)
428 close(out);
429 if (git_connection_is_socket(conn))
430 shutdown(fd[0], SHUT_WR);
431 if (use_sideband)
432 finish_async(&demux);
37cb1dd6 433 fd[1] = -1;
f5d942e1
NTND
434 return -1;
435 }
37cb1dd6
JL
436 if (!args->stateless_rpc)
437 /* Closed by pack_objects() via start_command() */
438 fd[1] = -1;
f5d942e1
NTND
439 }
440 if (args->stateless_rpc && cmds_sent)
441 packet_flush(out);
442
443 if (status_report && cmds_sent)
444 ret = receive_status(in, remote_refs);
445 else
446 ret = 0;
447 if (args->stateless_rpc)
448 packet_flush(out);
449
450 if (use_sideband && cmds_sent) {
451 if (finish_async(&demux)) {
452 error("error in sideband demultiplexer");
453 ret = -1;
454 }
455 close(demux.out);
456 }
457
458 if (ret < 0)
459 return ret;
460
461 if (args->porcelain)
462 return 0;
463
464 for (ref = remote_refs; ref; ref = ref->next) {
465 switch (ref->status) {
466 case REF_STATUS_NONE:
467 case REF_STATUS_UPTODATE:
468 case REF_STATUS_OK:
469 break;
470 default:
471 return -1;
472 }
473 }
474 return 0;
475}