pkt-line: move a misplaced comment
[git/gitweb.git] / send-pack.c
blobe91cbe2c957003c98fcefee82f546101cdd13a9f
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 "send-pack.h"
9 #include "quote.h"
10 #include "transport.h"
11 #include "version.h"
13 static int feed_object(const unsigned char *sha1, int fd, int negative)
15 char buf[42];
17 if (negative && !has_sha1_file(sha1))
18 return 1;
20 memcpy(buf + negative, sha1_to_hex(sha1), 40);
21 if (negative)
22 buf[0] = '^';
23 buf[40 + negative] = '\n';
24 return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
28 * Make a pack stream and spit it out into file descriptor fd
30 static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
33 * The child becomes pack-objects --revs; we feed
34 * the revision parameters to it via its stdin and
35 * let its stdout go back to the other end.
37 const char *argv[] = {
38 "pack-objects",
39 "--all-progress-implied",
40 "--revs",
41 "--stdout",
42 NULL,
43 NULL,
44 NULL,
45 NULL,
46 NULL,
48 struct child_process po;
49 int i;
51 i = 4;
52 if (args->use_thin_pack)
53 argv[i++] = "--thin";
54 if (args->use_ofs_delta)
55 argv[i++] = "--delta-base-offset";
56 if (args->quiet || !args->progress)
57 argv[i++] = "-q";
58 if (args->progress)
59 argv[i++] = "--progress";
60 memset(&po, 0, sizeof(po));
61 po.argv = argv;
62 po.in = -1;
63 po.out = args->stateless_rpc ? -1 : fd;
64 po.git_cmd = 1;
65 if (start_command(&po))
66 die_errno("git pack-objects failed");
69 * We feed the pack-objects we just spawned with revision
70 * parameters by writing to the pipe.
72 for (i = 0; i < extra->nr; i++)
73 if (!feed_object(extra->array[i], po.in, 1))
74 break;
76 while (refs) {
77 if (!is_null_sha1(refs->old_sha1) &&
78 !feed_object(refs->old_sha1, po.in, 1))
79 break;
80 if (!is_null_sha1(refs->new_sha1) &&
81 !feed_object(refs->new_sha1, po.in, 0))
82 break;
83 refs = refs->next;
86 close(po.in);
88 if (args->stateless_rpc) {
89 char *buf = xmalloc(LARGE_PACKET_MAX);
90 while (1) {
91 ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
92 if (n <= 0)
93 break;
94 send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
96 free(buf);
97 close(po.out);
98 po.out = -1;
101 if (finish_command(&po))
102 return -1;
103 return 0;
106 static int receive_status(int in, struct ref *refs)
108 struct ref *hint;
109 char line[1000];
110 int ret = 0;
111 int len = packet_read_line(in, line, sizeof(line));
112 if (prefixcmp(line, "unpack "))
113 return error("did not receive remote status");
114 if (strcmp(line, "unpack ok\n")) {
115 char *p = line + strlen(line) - 1;
116 if (*p == '\n')
117 *p = '\0';
118 error("unpack failed: %s", line + 7);
119 ret = -1;
121 hint = NULL;
122 while (1) {
123 char *refname;
124 char *msg;
125 len = packet_read_line(in, line, sizeof(line));
126 if (!len)
127 break;
128 if (prefixcmp(line, "ok ") && prefixcmp(line, "ng ")) {
129 error("invalid ref status from remote: %s", line);
130 ret = -1;
131 break;
134 line[strlen(line)-1] = '\0';
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 int send_pack(struct send_pack_args *args,
182 int fd[], struct child_process *conn,
183 struct ref *remote_refs,
184 struct extra_have_objects *extra_have)
186 int in = fd[0];
187 int out = fd[1];
188 struct strbuf req_buf = STRBUF_INIT;
189 struct ref *ref;
190 int new_refs;
191 int allow_deleting_refs = 0;
192 int status_report = 0;
193 int use_sideband = 0;
194 int quiet_supported = 0;
195 int agent_supported = 0;
196 unsigned cmds_sent = 0;
197 int ret;
198 struct async demux;
200 /* Does the other end support the reporting? */
201 if (server_supports("report-status"))
202 status_report = 1;
203 if (server_supports("delete-refs"))
204 allow_deleting_refs = 1;
205 if (server_supports("ofs-delta"))
206 args->use_ofs_delta = 1;
207 if (server_supports("side-band-64k"))
208 use_sideband = 1;
209 if (server_supports("quiet"))
210 quiet_supported = 1;
211 if (server_supports("agent"))
212 agent_supported = 1;
214 if (!remote_refs) {
215 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
216 "Perhaps you should specify a branch such as 'master'.\n");
217 return 0;
221 * Finally, tell the other end!
223 new_refs = 0;
224 for (ref = remote_refs; ref; ref = ref->next) {
225 if (!ref->peer_ref && !args->send_mirror)
226 continue;
228 /* Check for statuses set by set_ref_status_for_push() */
229 switch (ref->status) {
230 case REF_STATUS_REJECT_NONFASTFORWARD:
231 case REF_STATUS_REJECT_ALREADY_EXISTS:
232 case REF_STATUS_REJECT_FETCH_FIRST:
233 case REF_STATUS_REJECT_NEEDS_FORCE:
234 case REF_STATUS_UPTODATE:
235 continue;
236 default:
237 ; /* do nothing */
240 if (ref->deletion && !allow_deleting_refs) {
241 ref->status = REF_STATUS_REJECT_NODELETE;
242 continue;
245 if (!ref->deletion)
246 new_refs++;
248 if (args->dry_run) {
249 ref->status = REF_STATUS_OK;
250 } else {
251 char *old_hex = sha1_to_hex(ref->old_sha1);
252 char *new_hex = sha1_to_hex(ref->new_sha1);
253 int quiet = quiet_supported && (args->quiet || !args->progress);
255 if (!cmds_sent && (status_report || use_sideband ||
256 quiet || agent_supported)) {
257 packet_buf_write(&req_buf,
258 "%s %s %s%c%s%s%s%s%s",
259 old_hex, new_hex, ref->name, 0,
260 status_report ? " report-status" : "",
261 use_sideband ? " side-band-64k" : "",
262 quiet ? " quiet" : "",
263 agent_supported ? " agent=" : "",
264 agent_supported ? git_user_agent_sanitized() : ""
267 else
268 packet_buf_write(&req_buf, "%s %s %s",
269 old_hex, new_hex, ref->name);
270 ref->status = status_report ?
271 REF_STATUS_EXPECTING_REPORT :
272 REF_STATUS_OK;
273 cmds_sent++;
277 if (args->stateless_rpc) {
278 if (!args->dry_run && cmds_sent) {
279 packet_buf_flush(&req_buf);
280 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
282 } else {
283 safe_write(out, req_buf.buf, req_buf.len);
284 packet_flush(out);
286 strbuf_release(&req_buf);
288 if (use_sideband && cmds_sent) {
289 memset(&demux, 0, sizeof(demux));
290 demux.proc = sideband_demux;
291 demux.data = fd;
292 demux.out = -1;
293 if (start_async(&demux))
294 die("send-pack: unable to fork off sideband demultiplexer");
295 in = demux.out;
298 if (new_refs && cmds_sent) {
299 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
300 for (ref = remote_refs; ref; ref = ref->next)
301 ref->status = REF_STATUS_NONE;
302 if (args->stateless_rpc)
303 close(out);
304 if (git_connection_is_socket(conn))
305 shutdown(fd[0], SHUT_WR);
306 if (use_sideband)
307 finish_async(&demux);
308 return -1;
311 if (args->stateless_rpc && cmds_sent)
312 packet_flush(out);
314 if (status_report && cmds_sent)
315 ret = receive_status(in, remote_refs);
316 else
317 ret = 0;
318 if (args->stateless_rpc)
319 packet_flush(out);
321 if (use_sideband && cmds_sent) {
322 if (finish_async(&demux)) {
323 error("error in sideband demultiplexer");
324 ret = -1;
326 close(demux.out);
329 if (ret < 0)
330 return ret;
332 if (args->porcelain)
333 return 0;
335 for (ref = remote_refs; ref; ref = ref->next) {
336 switch (ref->status) {
337 case REF_STATUS_NONE:
338 case REF_STATUS_UPTODATE:
339 case REF_STATUS_OK:
340 break;
341 default:
342 return -1;
345 return 0;