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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" | |
12 | ||
13 | static int feed_object(const unsigned char *sha1, int fd, int negative) | |
14 | { | |
15 | char buf[42]; | |
16 | ||
17 | if (negative && !has_sha1_file(sha1)) | |
18 | return 1; | |
19 | ||
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"); | |
25 | } | |
26 | ||
27 | /* | |
28 | * Make a pack stream and spit it out into file descriptor fd | |
29 | */ | |
30 | static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args) | |
31 | { | |
32 | /* | |
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. | |
36 | */ | |
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, | |
47 | }; | |
48 | struct child_process po; | |
49 | int i; | |
50 | ||
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"); | |
67 | ||
68 | /* | |
69 | * We feed the pack-objects we just spawned with revision | |
70 | * parameters by writing to the pipe. | |
71 | */ | |
72 | for (i = 0; i < extra->nr; i++) | |
73 | if (!feed_object(extra->array[i], po.in, 1)) | |
74 | break; | |
75 | ||
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; | |
84 | } | |
85 | ||
86 | close(po.in); | |
87 | ||
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); | |
95 | } | |
96 | free(buf); | |
97 | close(po.out); | |
98 | po.out = -1; | |
99 | } | |
100 | ||
101 | if (finish_command(&po)) | |
102 | return -1; | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static int receive_status(int in, struct ref *refs) | |
107 | { | |
108 | struct ref *hint; | |
109 | int ret = 0; | |
110 | char *line = packet_read_line(in, NULL); | |
111 | if (prefixcmp(line, "unpack ")) | |
112 | return error("did not receive remote status"); | |
113 | if (strcmp(line, "unpack ok")) { | |
114 | error("unpack failed: %s", line + 7); | |
115 | ret = -1; | |
116 | } | |
117 | hint = NULL; | |
118 | while (1) { | |
119 | char *refname; | |
120 | char *msg; | |
121 | line = packet_read_line(in, NULL); | |
122 | if (!line) | |
123 | break; | |
124 | if (prefixcmp(line, "ok ") && prefixcmp(line, "ng ")) { | |
125 | error("invalid ref status from remote: %s", line); | |
126 | ret = -1; | |
127 | break; | |
128 | } | |
129 | ||
130 | refname = line + 3; | |
131 | msg = strchr(refname, ' '); | |
132 | if (msg) | |
133 | *msg++ = '\0'; | |
134 | ||
135 | /* first try searching at our hint, falling back to all refs */ | |
136 | if (hint) | |
137 | hint = find_ref_by_name(hint, refname); | |
138 | if (!hint) | |
139 | hint = find_ref_by_name(refs, refname); | |
140 | if (!hint) { | |
141 | warning("remote reported status on unknown ref: %s", | |
142 | refname); | |
143 | continue; | |
144 | } | |
145 | if (hint->status != REF_STATUS_EXPECTING_REPORT) { | |
146 | warning("remote reported status on unexpected ref: %s", | |
147 | refname); | |
148 | continue; | |
149 | } | |
150 | ||
151 | if (line[0] == 'o' && line[1] == 'k') | |
152 | hint->status = REF_STATUS_OK; | |
153 | else { | |
154 | hint->status = REF_STATUS_REMOTE_REJECT; | |
155 | ret = -1; | |
156 | } | |
157 | if (msg) | |
158 | hint->remote_status = xstrdup(msg); | |
159 | /* start our next search from the next ref */ | |
160 | hint = hint->next; | |
161 | } | |
162 | return ret; | |
163 | } | |
164 | ||
165 | static int sideband_demux(int in, int out, void *data) | |
166 | { | |
167 | int *fd = data, ret; | |
168 | #ifdef NO_PTHREADS | |
169 | close(fd[1]); | |
170 | #endif | |
171 | ret = recv_sideband("send-pack", fd[0], out); | |
172 | close(out); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | int send_pack(struct send_pack_args *args, | |
177 | int fd[], struct child_process *conn, | |
178 | struct ref *remote_refs, | |
179 | struct extra_have_objects *extra_have) | |
180 | { | |
181 | int in = fd[0]; | |
182 | int out = fd[1]; | |
183 | struct strbuf req_buf = STRBUF_INIT; | |
184 | struct ref *ref; | |
185 | int new_refs; | |
186 | int allow_deleting_refs = 0; | |
187 | int status_report = 0; | |
188 | int use_sideband = 0; | |
189 | int quiet_supported = 0; | |
190 | int agent_supported = 0; | |
191 | unsigned cmds_sent = 0; | |
192 | int ret; | |
193 | struct async demux; | |
194 | ||
195 | /* Does the other end support the reporting? */ | |
196 | if (server_supports("report-status")) | |
197 | status_report = 1; | |
198 | if (server_supports("delete-refs")) | |
199 | allow_deleting_refs = 1; | |
200 | if (server_supports("ofs-delta")) | |
201 | args->use_ofs_delta = 1; | |
202 | if (server_supports("side-band-64k")) | |
203 | use_sideband = 1; | |
204 | if (server_supports("quiet")) | |
205 | quiet_supported = 1; | |
206 | if (server_supports("agent")) | |
207 | agent_supported = 1; | |
208 | ||
209 | if (!remote_refs) { | |
210 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
211 | "Perhaps you should specify a branch such as 'master'.\n"); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Finally, tell the other end! | |
217 | */ | |
218 | new_refs = 0; | |
219 | for (ref = remote_refs; ref; ref = ref->next) { | |
220 | if (!ref->peer_ref && !args->send_mirror) | |
221 | continue; | |
222 | ||
223 | /* Check for statuses set by set_ref_status_for_push() */ | |
224 | switch (ref->status) { | |
225 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
226 | case REF_STATUS_REJECT_ALREADY_EXISTS: | |
227 | case REF_STATUS_REJECT_FETCH_FIRST: | |
228 | case REF_STATUS_REJECT_NEEDS_FORCE: | |
229 | case REF_STATUS_UPTODATE: | |
230 | continue; | |
231 | default: | |
232 | ; /* do nothing */ | |
233 | } | |
234 | ||
235 | if (ref->deletion && !allow_deleting_refs) { | |
236 | ref->status = REF_STATUS_REJECT_NODELETE; | |
237 | continue; | |
238 | } | |
239 | ||
240 | if (!ref->deletion) | |
241 | new_refs++; | |
242 | ||
243 | if (args->dry_run) { | |
244 | ref->status = REF_STATUS_OK; | |
245 | } else { | |
246 | char *old_hex = sha1_to_hex(ref->old_sha1); | |
247 | char *new_hex = sha1_to_hex(ref->new_sha1); | |
248 | int quiet = quiet_supported && (args->quiet || !args->progress); | |
249 | ||
250 | if (!cmds_sent && (status_report || use_sideband || | |
251 | quiet || agent_supported)) { | |
252 | packet_buf_write(&req_buf, | |
253 | "%s %s %s%c%s%s%s%s%s", | |
254 | old_hex, new_hex, ref->name, 0, | |
255 | status_report ? " report-status" : "", | |
256 | use_sideband ? " side-band-64k" : "", | |
257 | quiet ? " quiet" : "", | |
258 | agent_supported ? " agent=" : "", | |
259 | agent_supported ? git_user_agent_sanitized() : "" | |
260 | ); | |
261 | } | |
262 | else | |
263 | packet_buf_write(&req_buf, "%s %s %s", | |
264 | old_hex, new_hex, ref->name); | |
265 | ref->status = status_report ? | |
266 | REF_STATUS_EXPECTING_REPORT : | |
267 | REF_STATUS_OK; | |
268 | cmds_sent++; | |
269 | } | |
270 | } | |
271 | ||
272 | if (args->stateless_rpc) { | |
273 | if (!args->dry_run && cmds_sent) { | |
274 | packet_buf_flush(&req_buf); | |
275 | send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX); | |
276 | } | |
277 | } else { | |
278 | write_or_die(out, req_buf.buf, req_buf.len); | |
279 | packet_flush(out); | |
280 | } | |
281 | strbuf_release(&req_buf); | |
282 | ||
283 | if (use_sideband && cmds_sent) { | |
284 | memset(&demux, 0, sizeof(demux)); | |
285 | demux.proc = sideband_demux; | |
286 | demux.data = fd; | |
287 | demux.out = -1; | |
288 | if (start_async(&demux)) | |
289 | die("send-pack: unable to fork off sideband demultiplexer"); | |
290 | in = demux.out; | |
291 | } | |
292 | ||
293 | if (new_refs && cmds_sent) { | |
294 | if (pack_objects(out, remote_refs, extra_have, args) < 0) { | |
295 | for (ref = remote_refs; ref; ref = ref->next) | |
296 | ref->status = REF_STATUS_NONE; | |
297 | if (args->stateless_rpc) | |
298 | close(out); | |
299 | if (git_connection_is_socket(conn)) | |
300 | shutdown(fd[0], SHUT_WR); | |
301 | if (use_sideband) | |
302 | finish_async(&demux); | |
303 | return -1; | |
304 | } | |
305 | } | |
306 | if (args->stateless_rpc && cmds_sent) | |
307 | packet_flush(out); | |
308 | ||
309 | if (status_report && cmds_sent) | |
310 | ret = receive_status(in, remote_refs); | |
311 | else | |
312 | ret = 0; | |
313 | if (args->stateless_rpc) | |
314 | packet_flush(out); | |
315 | ||
316 | if (use_sideband && cmds_sent) { | |
317 | if (finish_async(&demux)) { | |
318 | error("error in sideband demultiplexer"); | |
319 | ret = -1; | |
320 | } | |
321 | close(demux.out); | |
322 | } | |
323 | ||
324 | if (ret < 0) | |
325 | return ret; | |
326 | ||
327 | if (args->porcelain) | |
328 | return 0; | |
329 | ||
330 | for (ref = remote_refs; ref; ref = ref->next) { | |
331 | switch (ref->status) { | |
332 | case REF_STATUS_NONE: | |
333 | case REF_STATUS_UPTODATE: | |
334 | case REF_STATUS_OK: | |
335 | break; | |
336 | default: | |
337 | return -1; | |
338 | } | |
339 | } | |
340 | return 0; | |
341 | } |