dir.h: move struct exclude declaration to top level
[git.git] / send-pack.c
blob6129b0fd8e8e1961ab4c74de4f421c41c7786b42
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"
15 static int feed_object(const unsigned char *sha1, int fd, int negative)
17 char buf[42];
19 if (negative && !has_sha1_file(sha1))
20 return 1;
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");
30 * Make a pack stream and spit it out into file descriptor fd
32 static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
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.
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,
50 struct child_process po;
51 int i;
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");
71 * We feed the pack-objects we just spawned with revision
72 * parameters by writing to the pipe.
74 for (i = 0; i < extra->nr; i++)
75 if (!feed_object(extra->sha1[i], po.in, 1))
76 break;
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;
88 close(po.in);
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);
98 free(buf);
99 close(po.out);
100 po.out = -1;
103 if (finish_command(&po))
104 return -1;
105 return 0;
108 static int receive_status(int in, struct ref *refs)
110 struct ref *hint;
111 int ret = 0;
112 char *line = packet_read_line(in, NULL);
113 if (!starts_with(line, "unpack "))
114 return error("did not receive remote status");
115 if (strcmp(line, "unpack ok")) {
116 error("unpack failed: %s", line + 7);
117 ret = -1;
119 hint = NULL;
120 while (1) {
121 char *refname;
122 char *msg;
123 line = packet_read_line(in, NULL);
124 if (!line)
125 break;
126 if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
127 error("invalid ref status from remote: %s", line);
128 ret = -1;
129 break;
132 refname = line + 3;
133 msg = strchr(refname, ' ');
134 if (msg)
135 *msg++ = '\0';
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;
147 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
148 warning("remote reported status on unexpected ref: %s",
149 refname);
150 continue;
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;
159 if (msg)
160 hint->remote_status = xstrdup(msg);
161 /* start our next search from the next ref */
162 hint = hint->next;
164 return ret;
167 static int sideband_demux(int in, int out, void *data)
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;
178 static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
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;
186 static void advertise_shallow_grafts_buf(struct strbuf *sb)
188 if (!is_repository_shallow())
189 return;
190 for_each_commit_graft(advertise_shallow_grafts_cb, sb);
193 int send_pack(struct send_pack_args *args,
194 int fd[], struct child_process *conn,
195 struct ref *remote_refs,
196 struct sha1_array *extra_have)
198 int in = fd[0];
199 int out = fd[1];
200 struct strbuf req_buf = STRBUF_INIT;
201 struct ref *ref;
202 int new_refs;
203 int allow_deleting_refs = 0;
204 int status_report = 0;
205 int use_sideband = 0;
206 int quiet_supported = 0;
207 int agent_supported = 0;
208 unsigned cmds_sent = 0;
209 int ret;
210 struct async demux;
212 /* Does the other end support the reporting? */
213 if (server_supports("report-status"))
214 status_report = 1;
215 if (server_supports("delete-refs"))
216 allow_deleting_refs = 1;
217 if (server_supports("ofs-delta"))
218 args->use_ofs_delta = 1;
219 if (server_supports("side-band-64k"))
220 use_sideband = 1;
221 if (server_supports("quiet"))
222 quiet_supported = 1;
223 if (server_supports("agent"))
224 agent_supported = 1;
225 if (server_supports("no-thin"))
226 args->use_thin_pack = 0;
228 if (!remote_refs) {
229 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
230 "Perhaps you should specify a branch such as 'master'.\n");
231 return 0;
234 if (!args->dry_run)
235 advertise_shallow_grafts_buf(&req_buf);
238 * Finally, tell the other end!
240 new_refs = 0;
241 for (ref = remote_refs; ref; ref = ref->next) {
242 if (!ref->peer_ref && !args->send_mirror)
243 continue;
245 /* Check for statuses set by set_ref_status_for_push() */
246 switch (ref->status) {
247 case REF_STATUS_REJECT_NONFASTFORWARD:
248 case REF_STATUS_REJECT_ALREADY_EXISTS:
249 case REF_STATUS_REJECT_FETCH_FIRST:
250 case REF_STATUS_REJECT_NEEDS_FORCE:
251 case REF_STATUS_REJECT_STALE:
252 case REF_STATUS_UPTODATE:
253 continue;
254 default:
255 ; /* do nothing */
258 if (ref->deletion && !allow_deleting_refs) {
259 ref->status = REF_STATUS_REJECT_NODELETE;
260 continue;
263 if (!ref->deletion)
264 new_refs++;
266 if (args->dry_run) {
267 ref->status = REF_STATUS_OK;
268 } else {
269 char *old_hex = sha1_to_hex(ref->old_sha1);
270 char *new_hex = sha1_to_hex(ref->new_sha1);
271 int quiet = quiet_supported && (args->quiet || !args->progress);
273 if (!cmds_sent && (status_report || use_sideband ||
274 quiet || agent_supported)) {
275 packet_buf_write(&req_buf,
276 "%s %s %s%c%s%s%s%s%s",
277 old_hex, new_hex, ref->name, 0,
278 status_report ? " report-status" : "",
279 use_sideband ? " side-band-64k" : "",
280 quiet ? " quiet" : "",
281 agent_supported ? " agent=" : "",
282 agent_supported ? git_user_agent_sanitized() : ""
285 else
286 packet_buf_write(&req_buf, "%s %s %s",
287 old_hex, new_hex, ref->name);
288 ref->status = status_report ?
289 REF_STATUS_EXPECTING_REPORT :
290 REF_STATUS_OK;
291 cmds_sent++;
295 if (args->stateless_rpc) {
296 if (!args->dry_run && (cmds_sent || is_repository_shallow())) {
297 packet_buf_flush(&req_buf);
298 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
300 } else {
301 write_or_die(out, req_buf.buf, req_buf.len);
302 packet_flush(out);
304 strbuf_release(&req_buf);
306 if (use_sideband && cmds_sent) {
307 memset(&demux, 0, sizeof(demux));
308 demux.proc = sideband_demux;
309 demux.data = fd;
310 demux.out = -1;
311 if (start_async(&demux))
312 die("send-pack: unable to fork off sideband demultiplexer");
313 in = demux.out;
316 if (new_refs && cmds_sent) {
317 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
318 for (ref = remote_refs; ref; ref = ref->next)
319 ref->status = REF_STATUS_NONE;
320 if (args->stateless_rpc)
321 close(out);
322 if (git_connection_is_socket(conn))
323 shutdown(fd[0], SHUT_WR);
324 if (use_sideband)
325 finish_async(&demux);
326 fd[1] = -1;
327 return -1;
329 if (!args->stateless_rpc)
330 /* Closed by pack_objects() via start_command() */
331 fd[1] = -1;
333 if (args->stateless_rpc && cmds_sent)
334 packet_flush(out);
336 if (status_report && cmds_sent)
337 ret = receive_status(in, remote_refs);
338 else
339 ret = 0;
340 if (args->stateless_rpc)
341 packet_flush(out);
343 if (use_sideband && cmds_sent) {
344 if (finish_async(&demux)) {
345 error("error in sideband demultiplexer");
346 ret = -1;
348 close(demux.out);
351 if (ret < 0)
352 return ret;
354 if (args->porcelain)
355 return 0;
357 for (ref = remote_refs; ref; ref = ref->next) {
358 switch (ref->status) {
359 case REF_STATUS_NONE:
360 case REF_STATUS_UPTODATE:
361 case REF_STATUS_OK:
362 break;
363 default:
364 return -1;
367 return 0;