completion: add a test for __git_remotes() helper function
[git.git] / send-pack.c
blob25947d7df9dd3af6e665d5d5eb63ec970617aef1
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"
8 #include "connect.h"
9 #include "send-pack.h"
10 #include "quote.h"
11 #include "transport.h"
12 #include "version.h"
13 #include "sha1-array.h"
14 #include "gpg-interface.h"
16 static int feed_object(const unsigned char *sha1, int fd, int negative)
18 char buf[42];
20 if (negative && !has_sha1_file(sha1))
21 return 1;
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");
31 * Make a pack stream and spit it out into file descriptor fd
33 static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
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.
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 NULL,
52 struct child_process po = CHILD_PROCESS_INIT;
53 int i;
55 i = 4;
56 if (args->use_thin_pack)
57 argv[i++] = "--thin";
58 if (args->use_ofs_delta)
59 argv[i++] = "--delta-base-offset";
60 if (args->quiet || !args->progress)
61 argv[i++] = "-q";
62 if (args->progress)
63 argv[i++] = "--progress";
64 if (is_repository_shallow())
65 argv[i++] = "--shallow";
66 po.argv = argv;
67 po.in = -1;
68 po.out = args->stateless_rpc ? -1 : fd;
69 po.git_cmd = 1;
70 if (start_command(&po))
71 die_errno("git pack-objects failed");
74 * We feed the pack-objects we just spawned with revision
75 * parameters by writing to the pipe.
77 for (i = 0; i < extra->nr; i++)
78 if (!feed_object(extra->sha1[i], po.in, 1))
79 break;
81 while (refs) {
82 if (!is_null_sha1(refs->old_sha1) &&
83 !feed_object(refs->old_sha1, po.in, 1))
84 break;
85 if (!is_null_sha1(refs->new_sha1) &&
86 !feed_object(refs->new_sha1, po.in, 0))
87 break;
88 refs = refs->next;
91 close(po.in);
93 if (args->stateless_rpc) {
94 char *buf = xmalloc(LARGE_PACKET_MAX);
95 while (1) {
96 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
97 if (n <= 0)
98 break;
99 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
101 free(buf);
102 close(po.out);
103 po.out = -1;
106 if (finish_command(&po))
107 return -1;
108 return 0;
111 static int receive_status(int in, struct ref *refs)
113 struct ref *hint;
114 int ret = 0;
115 char *line = packet_read_line(in, NULL);
116 if (!starts_with(line, "unpack "))
117 return error("did not receive remote status");
118 if (strcmp(line, "unpack ok")) {
119 error("unpack failed: %s", line + 7);
120 ret = -1;
122 hint = NULL;
123 while (1) {
124 char *refname;
125 char *msg;
126 line = packet_read_line(in, NULL);
127 if (!line)
128 break;
129 if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
130 error("invalid ref status from remote: %s", line);
131 ret = -1;
132 break;
135 refname = line + 3;
136 msg = strchr(refname, ' ');
137 if (msg)
138 *msg++ = '\0';
140 /* first try searching at our hint, falling back to all refs */
141 if (hint)
142 hint = find_ref_by_name(hint, refname);
143 if (!hint)
144 hint = find_ref_by_name(refs, refname);
145 if (!hint) {
146 warning("remote reported status on unknown ref: %s",
147 refname);
148 continue;
150 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
151 warning("remote reported status on unexpected ref: %s",
152 refname);
153 continue;
156 if (line[0] == 'o' && line[1] == 'k')
157 hint->status = REF_STATUS_OK;
158 else {
159 hint->status = REF_STATUS_REMOTE_REJECT;
160 ret = -1;
162 if (msg)
163 hint->remote_status = xstrdup(msg);
164 /* start our next search from the next ref */
165 hint = hint->next;
167 return ret;
170 static int sideband_demux(int in, int out, void *data)
172 int *fd = data, ret;
173 #ifdef NO_PTHREADS
174 close(fd[1]);
175 #endif
176 ret = recv_sideband("send-pack", fd[0], out);
177 close(out);
178 return ret;
181 static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
183 struct strbuf *sb = cb;
184 if (graft->nr_parent == -1)
185 packet_buf_write(sb, "shallow %s\n", sha1_to_hex(graft->sha1));
186 return 0;
189 static void advertise_shallow_grafts_buf(struct strbuf *sb)
191 if (!is_repository_shallow())
192 return;
193 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
196 static int ref_update_to_be_sent(const struct ref *ref, const struct send_pack_args *args)
198 if (!ref->peer_ref && !args->send_mirror)
199 return 0;
201 /* Check for statuses set by set_ref_status_for_push() */
202 switch (ref->status) {
203 case REF_STATUS_REJECT_NONFASTFORWARD:
204 case REF_STATUS_REJECT_ALREADY_EXISTS:
205 case REF_STATUS_REJECT_FETCH_FIRST:
206 case REF_STATUS_REJECT_NEEDS_FORCE:
207 case REF_STATUS_REJECT_STALE:
208 case REF_STATUS_REJECT_NODELETE:
209 case REF_STATUS_UPTODATE:
210 return 0;
211 default:
212 return 1;
217 * the beginning of the next line, or the end of buffer.
219 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
220 * convert many similar uses found by "git grep -A4 memchr".
222 static const char *next_line(const char *line, size_t len)
224 const char *nl = memchr(line, '\n', len);
225 if (!nl)
226 return line + len; /* incomplete line */
227 return nl + 1;
230 static int generate_push_cert(struct strbuf *req_buf,
231 const struct ref *remote_refs,
232 struct send_pack_args *args,
233 const char *cap_string,
234 const char *push_cert_nonce)
236 const struct ref *ref;
237 char *signing_key = xstrdup(get_signing_key());
238 const char *cp, *np;
239 struct strbuf cert = STRBUF_INIT;
240 int update_seen = 0;
242 strbuf_addf(&cert, "certificate version 0.1\n");
243 strbuf_addf(&cert, "pusher %s ", signing_key);
244 datestamp(&cert);
245 strbuf_addch(&cert, '\n');
246 if (args->url && *args->url) {
247 char *anon_url = transport_anonymize_url(args->url);
248 strbuf_addf(&cert, "pushee %s\n", anon_url);
249 free(anon_url);
251 if (push_cert_nonce[0])
252 strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
253 strbuf_addstr(&cert, "\n");
255 for (ref = remote_refs; ref; ref = ref->next) {
256 if (!ref_update_to_be_sent(ref, args))
257 continue;
258 update_seen = 1;
259 strbuf_addf(&cert, "%s %s %s\n",
260 sha1_to_hex(ref->old_sha1),
261 sha1_to_hex(ref->new_sha1),
262 ref->name);
264 if (!update_seen)
265 goto free_return;
267 if (sign_buffer(&cert, &cert, signing_key))
268 die(_("failed to sign the push certificate"));
270 packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
271 for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
272 np = next_line(cp, cert.buf + cert.len - cp);
273 packet_buf_write(req_buf,
274 "%.*s", (int)(np - cp), cp);
276 packet_buf_write(req_buf, "push-cert-end\n");
278 free_return:
279 free(signing_key);
280 strbuf_release(&cert);
281 return update_seen;
284 int send_pack(struct send_pack_args *args,
285 int fd[], struct child_process *conn,
286 struct ref *remote_refs,
287 struct sha1_array *extra_have)
289 int in = fd[0];
290 int out = fd[1];
291 struct strbuf req_buf = STRBUF_INIT;
292 struct strbuf cap_buf = STRBUF_INIT;
293 struct ref *ref;
294 int need_pack_data = 0;
295 int allow_deleting_refs = 0;
296 int status_report = 0;
297 int use_sideband = 0;
298 int quiet_supported = 0;
299 int agent_supported = 0;
300 unsigned cmds_sent = 0;
301 int ret;
302 struct async demux;
303 const char *push_cert_nonce = NULL;
305 /* Does the other end support the reporting? */
306 if (server_supports("report-status"))
307 status_report = 1;
308 if (server_supports("delete-refs"))
309 allow_deleting_refs = 1;
310 if (server_supports("ofs-delta"))
311 args->use_ofs_delta = 1;
312 if (server_supports("side-band-64k"))
313 use_sideband = 1;
314 if (server_supports("quiet"))
315 quiet_supported = 1;
316 if (server_supports("agent"))
317 agent_supported = 1;
318 if (server_supports("no-thin"))
319 args->use_thin_pack = 0;
320 if (args->push_cert) {
321 int len;
323 push_cert_nonce = server_feature_value("push-cert", &len);
324 if (!push_cert_nonce)
325 die(_("the receiving end does not support --signed push"));
326 push_cert_nonce = xmemdupz(push_cert_nonce, len);
329 if (!remote_refs) {
330 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
331 "Perhaps you should specify a branch such as 'master'.\n");
332 return 0;
335 if (status_report)
336 strbuf_addstr(&cap_buf, " report-status");
337 if (use_sideband)
338 strbuf_addstr(&cap_buf, " side-band-64k");
339 if (quiet_supported && (args->quiet || !args->progress))
340 strbuf_addstr(&cap_buf, " quiet");
341 if (agent_supported)
342 strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
345 * NEEDSWORK: why does delete-refs have to be so specific to
346 * send-pack machinery that set_ref_status_for_push() cannot
347 * set this bit for us???
349 for (ref = remote_refs; ref; ref = ref->next)
350 if (ref->deletion && !allow_deleting_refs)
351 ref->status = REF_STATUS_REJECT_NODELETE;
353 if (!args->dry_run)
354 advertise_shallow_grafts_buf(&req_buf);
356 if (!args->dry_run && args->push_cert)
357 cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
358 cap_buf.buf, push_cert_nonce);
361 * Clear the status for each ref and see if we need to send
362 * the pack data.
364 for (ref = remote_refs; ref; ref = ref->next) {
365 if (!ref_update_to_be_sent(ref, args))
366 continue;
368 if (!ref->deletion)
369 need_pack_data = 1;
371 if (args->dry_run || !status_report)
372 ref->status = REF_STATUS_OK;
373 else
374 ref->status = REF_STATUS_EXPECTING_REPORT;
378 * Finally, tell the other end!
380 for (ref = remote_refs; ref; ref = ref->next) {
381 char *old_hex, *new_hex;
383 if (args->dry_run || args->push_cert)
384 continue;
386 if (!ref_update_to_be_sent(ref, args))
387 continue;
389 old_hex = sha1_to_hex(ref->old_sha1);
390 new_hex = sha1_to_hex(ref->new_sha1);
391 if (!cmds_sent) {
392 packet_buf_write(&req_buf,
393 "%s %s %s%c%s",
394 old_hex, new_hex, ref->name, 0,
395 cap_buf.buf);
396 cmds_sent = 1;
397 } else {
398 packet_buf_write(&req_buf, "%s %s %s",
399 old_hex, new_hex, ref->name);
403 if (args->stateless_rpc) {
404 if (!args->dry_run && (cmds_sent || is_repository_shallow())) {
405 packet_buf_flush(&req_buf);
406 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
408 } else {
409 write_or_die(out, req_buf.buf, req_buf.len);
410 packet_flush(out);
412 strbuf_release(&req_buf);
413 strbuf_release(&cap_buf);
415 if (use_sideband && cmds_sent) {
416 memset(&demux, 0, sizeof(demux));
417 demux.proc = sideband_demux;
418 demux.data = fd;
419 demux.out = -1;
420 if (start_async(&demux))
421 die("send-pack: unable to fork off sideband demultiplexer");
422 in = demux.out;
425 if (need_pack_data && cmds_sent) {
426 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
427 for (ref = remote_refs; ref; ref = ref->next)
428 ref->status = REF_STATUS_NONE;
429 if (args->stateless_rpc)
430 close(out);
431 if (git_connection_is_socket(conn))
432 shutdown(fd[0], SHUT_WR);
433 if (use_sideband)
434 finish_async(&demux);
435 fd[1] = -1;
436 return -1;
438 if (!args->stateless_rpc)
439 /* Closed by pack_objects() via start_command() */
440 fd[1] = -1;
442 if (args->stateless_rpc && cmds_sent)
443 packet_flush(out);
445 if (status_report && cmds_sent)
446 ret = receive_status(in, remote_refs);
447 else
448 ret = 0;
449 if (args->stateless_rpc)
450 packet_flush(out);
452 if (use_sideband && cmds_sent) {
453 if (finish_async(&demux)) {
454 error("error in sideband demultiplexer");
455 ret = -1;
457 close(demux.out);
460 if (ret < 0)
461 return ret;
463 if (args->porcelain)
464 return 0;
466 for (ref = remote_refs; ref; ref = ref->next) {
467 switch (ref->status) {
468 case REF_STATUS_NONE:
469 case REF_STATUS_UPTODATE:
470 case REF_STATUS_OK:
471 break;
472 default:
473 return -1;
476 return 0;