Merge branch 'esr/maint-doc-fast-import'
[git.git] / send-pack.c
blobf50dfd9f488821e6b052affb19c0048afd11109c
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 (len < 10 || memcmp(line, "unpack ", 7))
113 return error("did not receive remote status");
114 if (memcmp(line, "unpack ok\n", 10)) {
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 (len < 3 ||
129 (memcmp(line, "ok ", 3) && memcmp(line, "ng ", 3))) {
130 fprintf(stderr, "protocol error: %s\n", line);
131 ret = -1;
132 break;
135 line[strlen(line)-1] = '\0';
136 refname = line + 3;
137 msg = strchr(refname, ' ');
138 if (msg)
139 *msg++ = '\0';
141 /* first try searching at our hint, falling back to all refs */
142 if (hint)
143 hint = find_ref_by_name(hint, refname);
144 if (!hint)
145 hint = find_ref_by_name(refs, refname);
146 if (!hint) {
147 warning("remote reported status on unknown ref: %s",
148 refname);
149 continue;
151 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
152 warning("remote reported status on unexpected ref: %s",
153 refname);
154 continue;
157 if (line[0] == 'o' && line[1] == 'k')
158 hint->status = REF_STATUS_OK;
159 else {
160 hint->status = REF_STATUS_REMOTE_REJECT;
161 ret = -1;
163 if (msg)
164 hint->remote_status = xstrdup(msg);
165 /* start our next search from the next ref */
166 hint = hint->next;
168 return ret;
171 static int sideband_demux(int in, int out, void *data)
173 int *fd = data, ret;
174 #ifdef NO_PTHREADS
175 close(fd[1]);
176 #endif
177 ret = recv_sideband("send-pack", fd[0], out);
178 close(out);
179 return ret;
182 int send_pack(struct send_pack_args *args,
183 int fd[], struct child_process *conn,
184 struct ref *remote_refs,
185 struct extra_have_objects *extra_have)
187 int in = fd[0];
188 int out = fd[1];
189 struct strbuf req_buf = STRBUF_INIT;
190 struct ref *ref;
191 int new_refs;
192 int allow_deleting_refs = 0;
193 int status_report = 0;
194 int use_sideband = 0;
195 int quiet_supported = 0;
196 int agent_supported = 0;
197 unsigned cmds_sent = 0;
198 int ret;
199 struct async demux;
201 /* Does the other end support the reporting? */
202 if (server_supports("report-status"))
203 status_report = 1;
204 if (server_supports("delete-refs"))
205 allow_deleting_refs = 1;
206 if (server_supports("ofs-delta"))
207 args->use_ofs_delta = 1;
208 if (server_supports("side-band-64k"))
209 use_sideband = 1;
210 if (server_supports("quiet"))
211 quiet_supported = 1;
212 if (server_supports("agent"))
213 agent_supported = 1;
215 if (!remote_refs) {
216 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
217 "Perhaps you should specify a branch such as 'master'.\n");
218 return 0;
222 * Finally, tell the other end!
224 new_refs = 0;
225 for (ref = remote_refs; ref; ref = ref->next) {
226 if (!ref->peer_ref && !args->send_mirror)
227 continue;
229 /* Check for statuses set by set_ref_status_for_push() */
230 switch (ref->status) {
231 case REF_STATUS_REJECT_NONFASTFORWARD:
232 case REF_STATUS_UPTODATE:
233 continue;
234 default:
235 ; /* do nothing */
238 if (ref->deletion && !allow_deleting_refs) {
239 ref->status = REF_STATUS_REJECT_NODELETE;
240 continue;
243 if (!ref->deletion)
244 new_refs++;
246 if (args->dry_run) {
247 ref->status = REF_STATUS_OK;
248 } else {
249 char *old_hex = sha1_to_hex(ref->old_sha1);
250 char *new_hex = sha1_to_hex(ref->new_sha1);
251 int quiet = quiet_supported && (args->quiet || !args->progress);
253 if (!cmds_sent && (status_report || use_sideband ||
254 quiet || agent_supported)) {
255 packet_buf_write(&req_buf,
256 "%s %s %s%c%s%s%s%s%s",
257 old_hex, new_hex, ref->name, 0,
258 status_report ? " report-status" : "",
259 use_sideband ? " side-band-64k" : "",
260 quiet ? " quiet" : "",
261 agent_supported ? " agent=" : "",
262 agent_supported ? git_user_agent_sanitized() : ""
265 else
266 packet_buf_write(&req_buf, "%s %s %s",
267 old_hex, new_hex, ref->name);
268 ref->status = status_report ?
269 REF_STATUS_EXPECTING_REPORT :
270 REF_STATUS_OK;
271 cmds_sent++;
275 if (args->stateless_rpc) {
276 if (!args->dry_run && cmds_sent) {
277 packet_buf_flush(&req_buf);
278 send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
280 } else {
281 safe_write(out, req_buf.buf, req_buf.len);
282 packet_flush(out);
284 strbuf_release(&req_buf);
286 if (use_sideband && cmds_sent) {
287 memset(&demux, 0, sizeof(demux));
288 demux.proc = sideband_demux;
289 demux.data = fd;
290 demux.out = -1;
291 if (start_async(&demux))
292 die("send-pack: unable to fork off sideband demultiplexer");
293 in = demux.out;
296 if (new_refs && cmds_sent) {
297 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
298 for (ref = remote_refs; ref; ref = ref->next)
299 ref->status = REF_STATUS_NONE;
300 if (args->stateless_rpc)
301 close(out);
302 if (git_connection_is_socket(conn))
303 shutdown(fd[0], SHUT_WR);
304 if (use_sideband)
305 finish_async(&demux);
306 return -1;
309 if (args->stateless_rpc && cmds_sent)
310 packet_flush(out);
312 if (status_report && cmds_sent)
313 ret = receive_status(in, remote_refs);
314 else
315 ret = 0;
316 if (args->stateless_rpc)
317 packet_flush(out);
319 if (use_sideband && cmds_sent) {
320 if (finish_async(&demux)) {
321 error("error in sideband demultiplexer");
322 ret = -1;
324 close(demux.out);
327 if (ret < 0)
328 return ret;
330 if (args->porcelain)
331 return 0;
333 for (ref = remote_refs; ref; ref = ref->next) {
334 switch (ref->status) {
335 case REF_STATUS_NONE:
336 case REF_STATUS_UPTODATE:
337 case REF_STATUS_OK:
338 break;
339 default:
340 return -1;
343 return 0;