send-pack: always send capabilities
[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"
f5d942e1
NTND
14
15static int feed_object(const unsigned char *sha1, int fd, int negative)
16{
17 char buf[42];
18
19 if (negative && !has_sha1_file(sha1))
20 return 1;
21
22 memcpy(buf + negative, sha1_to_hex(sha1), 40);
23 if (negative)
24 buf[0] = '^';
25 buf[40 + negative] = '\n';
26 return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
27}
28
29/*
30 * Make a pack stream and spit it out into file descriptor fd
31 */
13eb4626 32static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
f5d942e1
NTND
33{
34 /*
35 * The child becomes pack-objects --revs; we feed
36 * the revision parameters to it via its stdin and
37 * let its stdout go back to the other end.
38 */
39 const char *argv[] = {
40 "pack-objects",
41 "--all-progress-implied",
42 "--revs",
43 "--stdout",
44 NULL,
45 NULL,
46 NULL,
47 NULL,
48 NULL,
49 };
50 struct child_process po;
51 int i;
52
53 i = 4;
54 if (args->use_thin_pack)
55 argv[i++] = "--thin";
56 if (args->use_ofs_delta)
57 argv[i++] = "--delta-base-offset";
58 if (args->quiet || !args->progress)
59 argv[i++] = "-q";
60 if (args->progress)
61 argv[i++] = "--progress";
62 memset(&po, 0, sizeof(po));
63 po.argv = argv;
64 po.in = -1;
65 po.out = args->stateless_rpc ? -1 : fd;
66 po.git_cmd = 1;
67 if (start_command(&po))
68 die_errno("git pack-objects failed");
69
70 /*
71 * We feed the pack-objects we just spawned with revision
72 * parameters by writing to the pipe.
73 */
74 for (i = 0; i < extra->nr; i++)
13eb4626 75 if (!feed_object(extra->sha1[i], po.in, 1))
f5d942e1
NTND
76 break;
77
78 while (refs) {
79 if (!is_null_sha1(refs->old_sha1) &&
80 !feed_object(refs->old_sha1, po.in, 1))
81 break;
82 if (!is_null_sha1(refs->new_sha1) &&
83 !feed_object(refs->new_sha1, po.in, 0))
84 break;
85 refs = refs->next;
86 }
87
88 close(po.in);
89
90 if (args->stateless_rpc) {
91 char *buf = xmalloc(LARGE_PACKET_MAX);
92 while (1) {
93 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
94 if (n <= 0)
95 break;
96 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
97 }
98 free(buf);
99 close(po.out);
100 po.out = -1;
101 }
102
103 if (finish_command(&po))
104 return -1;
105 return 0;
106}
107
108static int receive_status(int in, struct ref *refs)
109{
110 struct ref *hint;
f5d942e1 111 int ret = 0;
74543a04 112 char *line = packet_read_line(in, NULL);
59556548 113 if (!starts_with(line, "unpack "))
f5d942e1 114 return error("did not receive remote status");
819b929d 115 if (strcmp(line, "unpack ok")) {
f5d942e1
NTND
116 error("unpack failed: %s", line + 7);
117 ret = -1;
118 }
119 hint = NULL;
120 while (1) {
121 char *refname;
122 char *msg;
74543a04
JK
123 line = packet_read_line(in, NULL);
124 if (!line)
f5d942e1 125 break;
59556548 126 if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
8f9e3e49 127 error("invalid ref status from remote: %s", line);
f5d942e1
NTND
128 ret = -1;
129 break;
130 }
131
f5d942e1
NTND
132 refname = line + 3;
133 msg = strchr(refname, ' ');
134 if (msg)
135 *msg++ = '\0';
136
137 /* first try searching at our hint, falling back to all refs */
138 if (hint)
139 hint = find_ref_by_name(hint, refname);
140 if (!hint)
141 hint = find_ref_by_name(refs, refname);
142 if (!hint) {
143 warning("remote reported status on unknown ref: %s",
144 refname);
145 continue;
146 }
147 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
148 warning("remote reported status on unexpected ref: %s",
149 refname);
150 continue;
151 }
152
153 if (line[0] == 'o' && line[1] == 'k')
154 hint->status = REF_STATUS_OK;
155 else {
156 hint->status = REF_STATUS_REMOTE_REJECT;
157 ret = -1;
158 }
159 if (msg)
160 hint->remote_status = xstrdup(msg);
161 /* start our next search from the next ref */
162 hint = hint->next;
163 }
164 return ret;
165}
166
167static int sideband_demux(int in, int out, void *data)
168{
169 int *fd = data, ret;
170#ifdef NO_PTHREADS
171 close(fd[1]);
172#endif
173 ret = recv_sideband("send-pack", fd[0], out);
174 close(out);
175 return ret;
176}
177
f2c681cf
NTND
178static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
179{
180 struct strbuf *sb = cb;
181 if (graft->nr_parent == -1)
182 packet_buf_write(sb, "shallow %s\n", sha1_to_hex(graft->sha1));
183 return 0;
184}
185
16a2743c 186static void advertise_shallow_grafts_buf(struct strbuf *sb)
f2c681cf
NTND
187{
188 if (!is_repository_shallow())
189 return;
190 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
191}
192
e40671a3
JH
193static int ref_update_to_be_sent(const struct ref *ref, const struct send_pack_args *args)
194{
195 if (!ref->peer_ref && !args->send_mirror)
196 return 0;
197
198 /* Check for statuses set by set_ref_status_for_push() */
199 switch (ref->status) {
200 case REF_STATUS_REJECT_NONFASTFORWARD:
201 case REF_STATUS_REJECT_ALREADY_EXISTS:
202 case REF_STATUS_REJECT_FETCH_FIRST:
203 case REF_STATUS_REJECT_NEEDS_FORCE:
204 case REF_STATUS_REJECT_STALE:
205 case REF_STATUS_REJECT_NODELETE:
206 case REF_STATUS_UPTODATE:
207 return 0;
208 default:
209 return 1;
210 }
211}
212
f5d942e1
NTND
213int send_pack(struct send_pack_args *args,
214 int fd[], struct child_process *conn,
215 struct ref *remote_refs,
13eb4626 216 struct sha1_array *extra_have)
f5d942e1
NTND
217{
218 int in = fd[0];
219 int out = fd[1];
220 struct strbuf req_buf = STRBUF_INIT;
221 struct ref *ref;
222 int new_refs;
223 int allow_deleting_refs = 0;
224 int status_report = 0;
225 int use_sideband = 0;
226 int quiet_supported = 0;
227 int agent_supported = 0;
228 unsigned cmds_sent = 0;
229 int ret;
230 struct async demux;
231
232 /* Does the other end support the reporting? */
233 if (server_supports("report-status"))
234 status_report = 1;
235 if (server_supports("delete-refs"))
236 allow_deleting_refs = 1;
237 if (server_supports("ofs-delta"))
238 args->use_ofs_delta = 1;
239 if (server_supports("side-band-64k"))
240 use_sideband = 1;
241 if (server_supports("quiet"))
242 quiet_supported = 1;
243 if (server_supports("agent"))
244 agent_supported = 1;
1ba98a79
CMN
245 if (server_supports("no-thin"))
246 args->use_thin_pack = 0;
f5d942e1
NTND
247
248 if (!remote_refs) {
249 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
250 "Perhaps you should specify a branch such as 'master'.\n");
251 return 0;
252 }
253
621b0599
JH
254 /*
255 * NEEDSWORK: why does delete-refs have to be so specific to
256 * send-pack machinery that set_ref_status_for_push() cannot
257 * set this bit for us???
258 */
259 for (ref = remote_refs; ref; ref = ref->next)
260 if (ref->deletion && !allow_deleting_refs)
261 ref->status = REF_STATUS_REJECT_NODELETE;
262
5dbd7676 263 if (!args->dry_run)
f2c681cf 264 advertise_shallow_grafts_buf(&req_buf);
5dbd7676 265
f5d942e1
NTND
266 /*
267 * Finally, tell the other end!
268 */
269 new_refs = 0;
270 for (ref = remote_refs; ref; ref = ref->next) {
e40671a3 271 if (!ref_update_to_be_sent(ref, args))
f5d942e1
NTND
272 continue;
273
f5d942e1
NTND
274 if (!ref->deletion)
275 new_refs++;
276
277 if (args->dry_run) {
278 ref->status = REF_STATUS_OK;
279 } else {
280 char *old_hex = sha1_to_hex(ref->old_sha1);
281 char *new_hex = sha1_to_hex(ref->new_sha1);
282 int quiet = quiet_supported && (args->quiet || !args->progress);
283
64de20a1 284 if (!cmds_sent)
f5d942e1
NTND
285 packet_buf_write(&req_buf,
286 "%s %s %s%c%s%s%s%s%s",
287 old_hex, new_hex, ref->name, 0,
288 status_report ? " report-status" : "",
289 use_sideband ? " side-band-64k" : "",
290 quiet ? " quiet" : "",
291 agent_supported ? " agent=" : "",
292 agent_supported ? git_user_agent_sanitized() : ""
293 );
f5d942e1
NTND
294 else
295 packet_buf_write(&req_buf, "%s %s %s",
296 old_hex, new_hex, ref->name);
297 ref->status = status_report ?
298 REF_STATUS_EXPECTING_REPORT :
299 REF_STATUS_OK;
300 cmds_sent++;
301 }
302 }
303
304 if (args->stateless_rpc) {
f2c681cf 305 if (!args->dry_run && (cmds_sent || is_repository_shallow())) {
f5d942e1
NTND
306 packet_buf_flush(&req_buf);
307 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
308 }
309 } else {
cdf4fb8e 310 write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1
NTND
311 packet_flush(out);
312 }
313 strbuf_release(&req_buf);
314
315 if (use_sideband && cmds_sent) {
316 memset(&demux, 0, sizeof(demux));
317 demux.proc = sideband_demux;
318 demux.data = fd;
319 demux.out = -1;
320 if (start_async(&demux))
321 die("send-pack: unable to fork off sideband demultiplexer");
322 in = demux.out;
323 }
324
325 if (new_refs && cmds_sent) {
326 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
327 for (ref = remote_refs; ref; ref = ref->next)
328 ref->status = REF_STATUS_NONE;
329 if (args->stateless_rpc)
330 close(out);
331 if (git_connection_is_socket(conn))
332 shutdown(fd[0], SHUT_WR);
333 if (use_sideband)
334 finish_async(&demux);
37cb1dd6 335 fd[1] = -1;
f5d942e1
NTND
336 return -1;
337 }
37cb1dd6
JL
338 if (!args->stateless_rpc)
339 /* Closed by pack_objects() via start_command() */
340 fd[1] = -1;
f5d942e1
NTND
341 }
342 if (args->stateless_rpc && cmds_sent)
343 packet_flush(out);
344
345 if (status_report && cmds_sent)
346 ret = receive_status(in, remote_refs);
347 else
348 ret = 0;
349 if (args->stateless_rpc)
350 packet_flush(out);
351
352 if (use_sideband && cmds_sent) {
353 if (finish_async(&demux)) {
354 error("error in sideband demultiplexer");
355 ret = -1;
356 }
357 close(demux.out);
358 }
359
360 if (ret < 0)
361 return ret;
362
363 if (args->porcelain)
364 return 0;
365
366 for (ref = remote_refs; ref; ref = ref->next) {
367 switch (ref->status) {
368 case REF_STATUS_NONE:
369 case REF_STATUS_UPTODATE:
370 case REF_STATUS_OK:
371 break;
372 default:
373 return -1;
374 }
375 }
376 return 0;
377}