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Commit | Line | Data |
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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 | |
16 | static 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 | 33 | static 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 | ||
109 | static 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 | ||
168 | static 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 |
179 | static 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 | 187 | static 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 |
194 | static 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 | */ | |
220 | static 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 | ||
228 | static void generate_push_cert(struct strbuf *req_buf, | |
229 | const struct ref *remote_refs, | |
230 | struct send_pack_args *args) | |
231 | { | |
232 | const struct ref *ref; | |
233 | char stamp[60]; | |
234 | char *signing_key = xstrdup(get_signing_key()); | |
235 | const char *cp, *np; | |
236 | struct strbuf cert = STRBUF_INIT; | |
237 | int update_seen = 0; | |
238 | ||
239 | datestamp(stamp, sizeof(stamp)); | |
240 | strbuf_addf(&cert, "certificate version 0.1\n"); | |
241 | strbuf_addf(&cert, "pusher %s %s\n", signing_key, stamp); | |
242 | strbuf_addstr(&cert, "\n"); | |
243 | ||
244 | for (ref = remote_refs; ref; ref = ref->next) { | |
245 | if (!ref_update_to_be_sent(ref, args)) | |
246 | continue; | |
247 | update_seen = 1; | |
248 | strbuf_addf(&cert, "%s %s %s\n", | |
249 | sha1_to_hex(ref->old_sha1), | |
250 | sha1_to_hex(ref->new_sha1), | |
251 | ref->name); | |
252 | } | |
253 | if (!update_seen) | |
254 | goto free_return; | |
255 | ||
256 | if (sign_buffer(&cert, &cert, signing_key)) | |
257 | die(_("failed to sign the push certificate")); | |
258 | ||
259 | packet_buf_write(req_buf, "push-cert\n"); | |
260 | for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) { | |
261 | np = next_line(cp, cert.buf + cert.len - cp); | |
262 | packet_buf_write(req_buf, | |
263 | "%.*s", (int)(np - cp), cp); | |
264 | } | |
265 | packet_buf_write(req_buf, "push-cert-end\n"); | |
266 | ||
267 | free_return: | |
268 | free(signing_key); | |
269 | strbuf_release(&cert); | |
270 | } | |
271 | ||
f5d942e1 NTND |
272 | int send_pack(struct send_pack_args *args, |
273 | int fd[], struct child_process *conn, | |
274 | struct ref *remote_refs, | |
13eb4626 | 275 | struct sha1_array *extra_have) |
f5d942e1 NTND |
276 | { |
277 | int in = fd[0]; | |
278 | int out = fd[1]; | |
279 | struct strbuf req_buf = STRBUF_INIT; | |
887f3533 | 280 | struct strbuf cap_buf = STRBUF_INIT; |
f5d942e1 | 281 | struct ref *ref; |
ab2b0c90 | 282 | int need_pack_data = 0; |
f5d942e1 NTND |
283 | int allow_deleting_refs = 0; |
284 | int status_report = 0; | |
285 | int use_sideband = 0; | |
286 | int quiet_supported = 0; | |
287 | int agent_supported = 0; | |
288 | unsigned cmds_sent = 0; | |
289 | int ret; | |
290 | struct async demux; | |
291 | ||
292 | /* Does the other end support the reporting? */ | |
293 | if (server_supports("report-status")) | |
294 | status_report = 1; | |
295 | if (server_supports("delete-refs")) | |
296 | allow_deleting_refs = 1; | |
297 | if (server_supports("ofs-delta")) | |
298 | args->use_ofs_delta = 1; | |
299 | if (server_supports("side-band-64k")) | |
300 | use_sideband = 1; | |
301 | if (server_supports("quiet")) | |
302 | quiet_supported = 1; | |
303 | if (server_supports("agent")) | |
304 | agent_supported = 1; | |
1ba98a79 CMN |
305 | if (server_supports("no-thin")) |
306 | args->use_thin_pack = 0; | |
a85b377d JH |
307 | if (args->push_cert && !server_supports("push-cert")) |
308 | die(_("the receiving end does not support --signed push")); | |
f5d942e1 NTND |
309 | |
310 | if (!remote_refs) { | |
311 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
312 | "Perhaps you should specify a branch such as 'master'.\n"); | |
313 | return 0; | |
314 | } | |
315 | ||
887f3533 JH |
316 | if (status_report) |
317 | strbuf_addstr(&cap_buf, " report-status"); | |
318 | if (use_sideband) | |
319 | strbuf_addstr(&cap_buf, " side-band-64k"); | |
320 | if (quiet_supported && (args->quiet || !args->progress)) | |
321 | strbuf_addstr(&cap_buf, " quiet"); | |
322 | if (agent_supported) | |
323 | strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized()); | |
324 | ||
621b0599 JH |
325 | /* |
326 | * NEEDSWORK: why does delete-refs have to be so specific to | |
327 | * send-pack machinery that set_ref_status_for_push() cannot | |
328 | * set this bit for us??? | |
329 | */ | |
330 | for (ref = remote_refs; ref; ref = ref->next) | |
331 | if (ref->deletion && !allow_deleting_refs) | |
332 | ref->status = REF_STATUS_REJECT_NODELETE; | |
333 | ||
5dbd7676 | 334 | if (!args->dry_run) |
f2c681cf | 335 | advertise_shallow_grafts_buf(&req_buf); |
5dbd7676 | 336 | |
a85b377d JH |
337 | if (!args->dry_run && args->push_cert) |
338 | generate_push_cert(&req_buf, remote_refs, args); | |
339 | ||
f5d942e1 | 340 | /* |
b783aa71 JH |
341 | * Clear the status for each ref and see if we need to send |
342 | * the pack data. | |
f5d942e1 | 343 | */ |
f5d942e1 | 344 | for (ref = remote_refs; ref; ref = ref->next) { |
e40671a3 | 345 | if (!ref_update_to_be_sent(ref, args)) |
f5d942e1 NTND |
346 | continue; |
347 | ||
f5d942e1 | 348 | if (!ref->deletion) |
ab2b0c90 | 349 | need_pack_data = 1; |
f5d942e1 | 350 | |
b783aa71 | 351 | if (args->dry_run || !status_report) |
f5d942e1 | 352 | ref->status = REF_STATUS_OK; |
b783aa71 JH |
353 | else |
354 | ref->status = REF_STATUS_EXPECTING_REPORT; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Finally, tell the other end! | |
359 | */ | |
360 | for (ref = remote_refs; ref; ref = ref->next) { | |
361 | char *old_hex, *new_hex; | |
362 | ||
363 | if (args->dry_run) | |
364 | continue; | |
365 | ||
366 | if (!ref_update_to_be_sent(ref, args)) | |
367 | continue; | |
368 | ||
369 | old_hex = sha1_to_hex(ref->old_sha1); | |
370 | new_hex = sha1_to_hex(ref->new_sha1); | |
c67072b9 | 371 | if (!cmds_sent) { |
b783aa71 JH |
372 | packet_buf_write(&req_buf, |
373 | "%s %s %s%c%s", | |
374 | old_hex, new_hex, ref->name, 0, | |
375 | cap_buf.buf); | |
c67072b9 JH |
376 | cmds_sent = 1; |
377 | } else { | |
b783aa71 JH |
378 | packet_buf_write(&req_buf, "%s %s %s", |
379 | old_hex, new_hex, ref->name); | |
c67072b9 | 380 | } |
f5d942e1 NTND |
381 | } |
382 | ||
383 | if (args->stateless_rpc) { | |
f2c681cf | 384 | if (!args->dry_run && (cmds_sent || is_repository_shallow())) { |
f5d942e1 NTND |
385 | packet_buf_flush(&req_buf); |
386 | send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX); | |
387 | } | |
388 | } else { | |
cdf4fb8e | 389 | write_or_die(out, req_buf.buf, req_buf.len); |
f5d942e1 NTND |
390 | packet_flush(out); |
391 | } | |
392 | strbuf_release(&req_buf); | |
887f3533 | 393 | strbuf_release(&cap_buf); |
f5d942e1 NTND |
394 | |
395 | if (use_sideband && cmds_sent) { | |
396 | memset(&demux, 0, sizeof(demux)); | |
397 | demux.proc = sideband_demux; | |
398 | demux.data = fd; | |
399 | demux.out = -1; | |
400 | if (start_async(&demux)) | |
401 | die("send-pack: unable to fork off sideband demultiplexer"); | |
402 | in = demux.out; | |
403 | } | |
404 | ||
ab2b0c90 | 405 | if (need_pack_data && cmds_sent) { |
f5d942e1 NTND |
406 | if (pack_objects(out, remote_refs, extra_have, args) < 0) { |
407 | for (ref = remote_refs; ref; ref = ref->next) | |
408 | ref->status = REF_STATUS_NONE; | |
409 | if (args->stateless_rpc) | |
410 | close(out); | |
411 | if (git_connection_is_socket(conn)) | |
412 | shutdown(fd[0], SHUT_WR); | |
413 | if (use_sideband) | |
414 | finish_async(&demux); | |
37cb1dd6 | 415 | fd[1] = -1; |
f5d942e1 NTND |
416 | return -1; |
417 | } | |
37cb1dd6 JL |
418 | if (!args->stateless_rpc) |
419 | /* Closed by pack_objects() via start_command() */ | |
420 | fd[1] = -1; | |
f5d942e1 NTND |
421 | } |
422 | if (args->stateless_rpc && cmds_sent) | |
423 | packet_flush(out); | |
424 | ||
425 | if (status_report && cmds_sent) | |
426 | ret = receive_status(in, remote_refs); | |
427 | else | |
428 | ret = 0; | |
429 | if (args->stateless_rpc) | |
430 | packet_flush(out); | |
431 | ||
432 | if (use_sideband && cmds_sent) { | |
433 | if (finish_async(&demux)) { | |
434 | error("error in sideband demultiplexer"); | |
435 | ret = -1; | |
436 | } | |
437 | close(demux.out); | |
438 | } | |
439 | ||
440 | if (ret < 0) | |
441 | return ret; | |
442 | ||
443 | if (args->porcelain) | |
444 | return 0; | |
445 | ||
446 | for (ref = remote_refs; ref; ref = ref->next) { | |
447 | switch (ref->status) { | |
448 | case REF_STATUS_NONE: | |
449 | case REF_STATUS_UPTODATE: | |
450 | case REF_STATUS_OK: | |
451 | break; | |
452 | default: | |
453 | return -1; | |
454 | } | |
455 | } | |
456 | return 0; | |
457 | } |