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1 | #include "cache.h" | |
2 | #include "refs.h" | |
3 | #include "pkt-line.h" | |
4 | #include "sideband.h" | |
5 | #include "tag.h" | |
6 | #include "object.h" | |
7 | #include "commit.h" | |
8 | #include "exec_cmd.h" | |
9 | #include "diff.h" | |
10 | #include "revision.h" | |
11 | #include "list-objects.h" | |
12 | #include "run-command.h" | |
13 | #include "sigchain.h" | |
14 | ||
15 | static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>"; | |
16 | ||
17 | /* bits #0..7 in revision.h, #8..10 in commit.c */ | |
18 | #define THEY_HAVE (1u << 11) | |
19 | #define OUR_REF (1u << 12) | |
20 | #define WANTED (1u << 13) | |
21 | #define COMMON_KNOWN (1u << 14) | |
22 | #define REACHABLE (1u << 15) | |
23 | ||
24 | #define SHALLOW (1u << 16) | |
25 | #define NOT_SHALLOW (1u << 17) | |
26 | #define CLIENT_SHALLOW (1u << 18) | |
27 | ||
28 | static unsigned long oldest_have; | |
29 | ||
30 | static int multi_ack, nr_our_refs; | |
31 | static int no_done; | |
32 | static int use_thin_pack, use_ofs_delta, use_include_tag; | |
33 | static int no_progress, daemon_mode; | |
34 | static int shallow_nr; | |
35 | static struct object_array have_obj; | |
36 | static struct object_array want_obj; | |
37 | static struct object_array extra_edge_obj; | |
38 | static unsigned int timeout; | |
39 | /* 0 for no sideband, | |
40 | * otherwise maximum packet size (up to 65520 bytes). | |
41 | */ | |
42 | static int use_sideband; | |
43 | static int debug_fd; | |
44 | static int advertise_refs; | |
45 | static int stateless_rpc; | |
46 | ||
47 | static void reset_timeout(void) | |
48 | { | |
49 | alarm(timeout); | |
50 | } | |
51 | ||
52 | static int strip(char *line, int len) | |
53 | { | |
54 | if (len && line[len-1] == '\n') | |
55 | line[--len] = 0; | |
56 | return len; | |
57 | } | |
58 | ||
59 | static ssize_t send_client_data(int fd, const char *data, ssize_t sz) | |
60 | { | |
61 | if (use_sideband) | |
62 | return send_sideband(1, fd, data, sz, use_sideband); | |
63 | if (fd == 3) | |
64 | /* emergency quit */ | |
65 | fd = 2; | |
66 | if (fd == 2) { | |
67 | /* XXX: are we happy to lose stuff here? */ | |
68 | xwrite(fd, data, sz); | |
69 | return sz; | |
70 | } | |
71 | return safe_write(fd, data, sz); | |
72 | } | |
73 | ||
74 | static FILE *pack_pipe = NULL; | |
75 | static void show_commit(struct commit *commit, void *data) | |
76 | { | |
77 | if (commit->object.flags & BOUNDARY) | |
78 | fputc('-', pack_pipe); | |
79 | if (fputs(sha1_to_hex(commit->object.sha1), pack_pipe) < 0) | |
80 | die("broken output pipe"); | |
81 | fputc('\n', pack_pipe); | |
82 | fflush(pack_pipe); | |
83 | free(commit->buffer); | |
84 | commit->buffer = NULL; | |
85 | } | |
86 | ||
87 | static void show_object(struct object *obj, const struct name_path *path, const char *component) | |
88 | { | |
89 | /* An object with name "foo\n0000000..." can be used to | |
90 | * confuse downstream git-pack-objects very badly. | |
91 | */ | |
92 | const char *name = path_name(path, component); | |
93 | const char *ep = strchr(name, '\n'); | |
94 | if (ep) { | |
95 | fprintf(pack_pipe, "%s %.*s\n", sha1_to_hex(obj->sha1), | |
96 | (int) (ep - name), | |
97 | name); | |
98 | } | |
99 | else | |
100 | fprintf(pack_pipe, "%s %s\n", | |
101 | sha1_to_hex(obj->sha1), name); | |
102 | free((char *)name); | |
103 | } | |
104 | ||
105 | static void show_edge(struct commit *commit) | |
106 | { | |
107 | fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1)); | |
108 | } | |
109 | ||
110 | static int do_rev_list(int in, int out, void *user_data) | |
111 | { | |
112 | int i; | |
113 | struct rev_info revs; | |
114 | ||
115 | pack_pipe = xfdopen(out, "w"); | |
116 | init_revisions(&revs, NULL); | |
117 | revs.tag_objects = 1; | |
118 | revs.tree_objects = 1; | |
119 | revs.blob_objects = 1; | |
120 | if (use_thin_pack) | |
121 | revs.edge_hint = 1; | |
122 | ||
123 | for (i = 0; i < want_obj.nr; i++) { | |
124 | struct object *o = want_obj.objects[i].item; | |
125 | /* why??? */ | |
126 | o->flags &= ~UNINTERESTING; | |
127 | add_pending_object(&revs, o, NULL); | |
128 | } | |
129 | for (i = 0; i < have_obj.nr; i++) { | |
130 | struct object *o = have_obj.objects[i].item; | |
131 | o->flags |= UNINTERESTING; | |
132 | add_pending_object(&revs, o, NULL); | |
133 | } | |
134 | setup_revisions(0, NULL, &revs, NULL); | |
135 | if (prepare_revision_walk(&revs)) | |
136 | die("revision walk setup failed"); | |
137 | mark_edges_uninteresting(revs.commits, &revs, show_edge); | |
138 | if (use_thin_pack) | |
139 | for (i = 0; i < extra_edge_obj.nr; i++) | |
140 | fprintf(pack_pipe, "-%s\n", sha1_to_hex( | |
141 | extra_edge_obj.objects[i].item->sha1)); | |
142 | traverse_commit_list(&revs, show_commit, show_object, NULL); | |
143 | fflush(pack_pipe); | |
144 | fclose(pack_pipe); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static void create_pack_file(void) | |
149 | { | |
150 | struct async rev_list; | |
151 | struct child_process pack_objects; | |
152 | int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr); | |
153 | char data[8193], progress[128]; | |
154 | char abort_msg[] = "aborting due to possible repository " | |
155 | "corruption on the remote side."; | |
156 | int buffered = -1; | |
157 | ssize_t sz; | |
158 | const char *argv[10]; | |
159 | int arg = 0; | |
160 | ||
161 | argv[arg++] = "pack-objects"; | |
162 | if (!shallow_nr) { | |
163 | argv[arg++] = "--revs"; | |
164 | if (create_full_pack) | |
165 | argv[arg++] = "--all"; | |
166 | else if (use_thin_pack) | |
167 | argv[arg++] = "--thin"; | |
168 | } | |
169 | ||
170 | argv[arg++] = "--stdout"; | |
171 | if (!no_progress) | |
172 | argv[arg++] = "--progress"; | |
173 | if (use_ofs_delta) | |
174 | argv[arg++] = "--delta-base-offset"; | |
175 | if (use_include_tag) | |
176 | argv[arg++] = "--include-tag"; | |
177 | argv[arg++] = NULL; | |
178 | ||
179 | memset(&pack_objects, 0, sizeof(pack_objects)); | |
180 | pack_objects.in = -1; | |
181 | pack_objects.out = -1; | |
182 | pack_objects.err = -1; | |
183 | pack_objects.git_cmd = 1; | |
184 | pack_objects.argv = argv; | |
185 | ||
186 | if (start_command(&pack_objects)) | |
187 | die("git upload-pack: unable to fork git-pack-objects"); | |
188 | ||
189 | if (shallow_nr) { | |
190 | memset(&rev_list, 0, sizeof(rev_list)); | |
191 | rev_list.proc = do_rev_list; | |
192 | rev_list.out = pack_objects.in; | |
193 | if (start_async(&rev_list)) | |
194 | die("git upload-pack: unable to fork git-rev-list"); | |
195 | } | |
196 | else { | |
197 | FILE *pipe_fd = xfdopen(pack_objects.in, "w"); | |
198 | if (!create_full_pack) { | |
199 | int i; | |
200 | for (i = 0; i < want_obj.nr; i++) | |
201 | fprintf(pipe_fd, "%s\n", sha1_to_hex(want_obj.objects[i].item->sha1)); | |
202 | fprintf(pipe_fd, "--not\n"); | |
203 | for (i = 0; i < have_obj.nr; i++) | |
204 | fprintf(pipe_fd, "%s\n", sha1_to_hex(have_obj.objects[i].item->sha1)); | |
205 | } | |
206 | ||
207 | fprintf(pipe_fd, "\n"); | |
208 | fflush(pipe_fd); | |
209 | fclose(pipe_fd); | |
210 | } | |
211 | ||
212 | ||
213 | /* We read from pack_objects.err to capture stderr output for | |
214 | * progress bar, and pack_objects.out to capture the pack data. | |
215 | */ | |
216 | ||
217 | while (1) { | |
218 | struct pollfd pfd[2]; | |
219 | int pe, pu, pollsize; | |
220 | ||
221 | reset_timeout(); | |
222 | ||
223 | pollsize = 0; | |
224 | pe = pu = -1; | |
225 | ||
226 | if (0 <= pack_objects.out) { | |
227 | pfd[pollsize].fd = pack_objects.out; | |
228 | pfd[pollsize].events = POLLIN; | |
229 | pu = pollsize; | |
230 | pollsize++; | |
231 | } | |
232 | if (0 <= pack_objects.err) { | |
233 | pfd[pollsize].fd = pack_objects.err; | |
234 | pfd[pollsize].events = POLLIN; | |
235 | pe = pollsize; | |
236 | pollsize++; | |
237 | } | |
238 | ||
239 | if (!pollsize) | |
240 | break; | |
241 | ||
242 | if (poll(pfd, pollsize, -1) < 0) { | |
243 | if (errno != EINTR) { | |
244 | error("poll failed, resuming: %s", | |
245 | strerror(errno)); | |
246 | sleep(1); | |
247 | } | |
248 | continue; | |
249 | } | |
250 | if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) { | |
251 | /* Status ready; we ship that in the side-band | |
252 | * or dump to the standard error. | |
253 | */ | |
254 | sz = xread(pack_objects.err, progress, | |
255 | sizeof(progress)); | |
256 | if (0 < sz) | |
257 | send_client_data(2, progress, sz); | |
258 | else if (sz == 0) { | |
259 | close(pack_objects.err); | |
260 | pack_objects.err = -1; | |
261 | } | |
262 | else | |
263 | goto fail; | |
264 | /* give priority to status messages */ | |
265 | continue; | |
266 | } | |
267 | if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) { | |
268 | /* Data ready; we keep the last byte to ourselves | |
269 | * in case we detect broken rev-list, so that we | |
270 | * can leave the stream corrupted. This is | |
271 | * unfortunate -- unpack-objects would happily | |
272 | * accept a valid packdata with trailing garbage, | |
273 | * so appending garbage after we pass all the | |
274 | * pack data is not good enough to signal | |
275 | * breakage to downstream. | |
276 | */ | |
277 | char *cp = data; | |
278 | ssize_t outsz = 0; | |
279 | if (0 <= buffered) { | |
280 | *cp++ = buffered; | |
281 | outsz++; | |
282 | } | |
283 | sz = xread(pack_objects.out, cp, | |
284 | sizeof(data) - outsz); | |
285 | if (0 < sz) | |
286 | ; | |
287 | else if (sz == 0) { | |
288 | close(pack_objects.out); | |
289 | pack_objects.out = -1; | |
290 | } | |
291 | else | |
292 | goto fail; | |
293 | sz += outsz; | |
294 | if (1 < sz) { | |
295 | buffered = data[sz-1] & 0xFF; | |
296 | sz--; | |
297 | } | |
298 | else | |
299 | buffered = -1; | |
300 | sz = send_client_data(1, data, sz); | |
301 | if (sz < 0) | |
302 | goto fail; | |
303 | } | |
304 | } | |
305 | ||
306 | if (finish_command(&pack_objects)) { | |
307 | error("git upload-pack: git-pack-objects died with error."); | |
308 | goto fail; | |
309 | } | |
310 | if (shallow_nr && finish_async(&rev_list)) | |
311 | goto fail; /* error was already reported */ | |
312 | ||
313 | /* flush the data */ | |
314 | if (0 <= buffered) { | |
315 | data[0] = buffered; | |
316 | sz = send_client_data(1, data, 1); | |
317 | if (sz < 0) | |
318 | goto fail; | |
319 | fprintf(stderr, "flushed.\n"); | |
320 | } | |
321 | if (use_sideband) | |
322 | packet_flush(1); | |
323 | return; | |
324 | ||
325 | fail: | |
326 | send_client_data(3, abort_msg, sizeof(abort_msg)); | |
327 | die("git upload-pack: %s", abort_msg); | |
328 | } | |
329 | ||
330 | static int got_sha1(char *hex, unsigned char *sha1) | |
331 | { | |
332 | struct object *o; | |
333 | int we_knew_they_have = 0; | |
334 | ||
335 | if (get_sha1_hex(hex, sha1)) | |
336 | die("git upload-pack: expected SHA1 object, got '%s'", hex); | |
337 | if (!has_sha1_file(sha1)) | |
338 | return -1; | |
339 | ||
340 | o = lookup_object(sha1); | |
341 | if (!(o && o->parsed)) | |
342 | o = parse_object(sha1); | |
343 | if (!o) | |
344 | die("oops (%s)", sha1_to_hex(sha1)); | |
345 | if (o->type == OBJ_COMMIT) { | |
346 | struct commit_list *parents; | |
347 | struct commit *commit = (struct commit *)o; | |
348 | if (o->flags & THEY_HAVE) | |
349 | we_knew_they_have = 1; | |
350 | else | |
351 | o->flags |= THEY_HAVE; | |
352 | if (!oldest_have || (commit->date < oldest_have)) | |
353 | oldest_have = commit->date; | |
354 | for (parents = commit->parents; | |
355 | parents; | |
356 | parents = parents->next) | |
357 | parents->item->object.flags |= THEY_HAVE; | |
358 | } | |
359 | if (!we_knew_they_have) { | |
360 | add_object_array(o, NULL, &have_obj); | |
361 | return 1; | |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int reachable(struct commit *want) | |
367 | { | |
368 | struct commit_list *work = NULL; | |
369 | ||
370 | commit_list_insert_by_date(want, &work); | |
371 | while (work) { | |
372 | struct commit_list *list = work->next; | |
373 | struct commit *commit = work->item; | |
374 | free(work); | |
375 | work = list; | |
376 | ||
377 | if (commit->object.flags & THEY_HAVE) { | |
378 | want->object.flags |= COMMON_KNOWN; | |
379 | break; | |
380 | } | |
381 | if (!commit->object.parsed) | |
382 | parse_object(commit->object.sha1); | |
383 | if (commit->object.flags & REACHABLE) | |
384 | continue; | |
385 | commit->object.flags |= REACHABLE; | |
386 | if (commit->date < oldest_have) | |
387 | continue; | |
388 | for (list = commit->parents; list; list = list->next) { | |
389 | struct commit *parent = list->item; | |
390 | if (!(parent->object.flags & REACHABLE)) | |
391 | commit_list_insert_by_date(parent, &work); | |
392 | } | |
393 | } | |
394 | want->object.flags |= REACHABLE; | |
395 | clear_commit_marks(want, REACHABLE); | |
396 | free_commit_list(work); | |
397 | return (want->object.flags & COMMON_KNOWN); | |
398 | } | |
399 | ||
400 | static int ok_to_give_up(void) | |
401 | { | |
402 | int i; | |
403 | ||
404 | if (!have_obj.nr) | |
405 | return 0; | |
406 | ||
407 | for (i = 0; i < want_obj.nr; i++) { | |
408 | struct object *want = want_obj.objects[i].item; | |
409 | ||
410 | if (want->flags & COMMON_KNOWN) | |
411 | continue; | |
412 | want = deref_tag(want, "a want line", 0); | |
413 | if (!want || want->type != OBJ_COMMIT) { | |
414 | /* no way to tell if this is reachable by | |
415 | * looking at the ancestry chain alone, so | |
416 | * leave a note to ourselves not to worry about | |
417 | * this object anymore. | |
418 | */ | |
419 | want_obj.objects[i].item->flags |= COMMON_KNOWN; | |
420 | continue; | |
421 | } | |
422 | if (!reachable((struct commit *)want)) | |
423 | return 0; | |
424 | } | |
425 | return 1; | |
426 | } | |
427 | ||
428 | static int get_common_commits(void) | |
429 | { | |
430 | static char line[1000]; | |
431 | unsigned char sha1[20]; | |
432 | char last_hex[41]; | |
433 | int got_common = 0; | |
434 | int got_other = 0; | |
435 | int sent_ready = 0; | |
436 | ||
437 | save_commit_buffer = 0; | |
438 | ||
439 | for (;;) { | |
440 | int len = packet_read_line(0, line, sizeof(line)); | |
441 | reset_timeout(); | |
442 | ||
443 | if (!len) { | |
444 | if (multi_ack == 2 && got_common | |
445 | && !got_other && ok_to_give_up()) { | |
446 | sent_ready = 1; | |
447 | packet_write(1, "ACK %s ready\n", last_hex); | |
448 | } | |
449 | if (have_obj.nr == 0 || multi_ack) | |
450 | packet_write(1, "NAK\n"); | |
451 | ||
452 | if (no_done && sent_ready) { | |
453 | packet_write(1, "ACK %s\n", last_hex); | |
454 | return 0; | |
455 | } | |
456 | if (stateless_rpc) | |
457 | exit(0); | |
458 | got_common = 0; | |
459 | got_other = 0; | |
460 | continue; | |
461 | } | |
462 | strip(line, len); | |
463 | if (!prefixcmp(line, "have ")) { | |
464 | switch (got_sha1(line+5, sha1)) { | |
465 | case -1: /* they have what we do not */ | |
466 | got_other = 1; | |
467 | if (multi_ack && ok_to_give_up()) { | |
468 | const char *hex = sha1_to_hex(sha1); | |
469 | if (multi_ack == 2) { | |
470 | sent_ready = 1; | |
471 | packet_write(1, "ACK %s ready\n", hex); | |
472 | } else | |
473 | packet_write(1, "ACK %s continue\n", hex); | |
474 | } | |
475 | break; | |
476 | default: | |
477 | got_common = 1; | |
478 | memcpy(last_hex, sha1_to_hex(sha1), 41); | |
479 | if (multi_ack == 2) | |
480 | packet_write(1, "ACK %s common\n", last_hex); | |
481 | else if (multi_ack) | |
482 | packet_write(1, "ACK %s continue\n", last_hex); | |
483 | else if (have_obj.nr == 1) | |
484 | packet_write(1, "ACK %s\n", last_hex); | |
485 | break; | |
486 | } | |
487 | continue; | |
488 | } | |
489 | if (!strcmp(line, "done")) { | |
490 | if (have_obj.nr > 0) { | |
491 | if (multi_ack) | |
492 | packet_write(1, "ACK %s\n", last_hex); | |
493 | return 0; | |
494 | } | |
495 | packet_write(1, "NAK\n"); | |
496 | return -1; | |
497 | } | |
498 | die("git upload-pack: expected SHA1 list, got '%s'", line); | |
499 | } | |
500 | } | |
501 | ||
502 | static void check_non_tip(void) | |
503 | { | |
504 | static const char *argv[] = { | |
505 | "rev-list", "--stdin", NULL, | |
506 | }; | |
507 | static struct child_process cmd; | |
508 | struct object *o; | |
509 | char namebuf[42]; /* ^ + SHA-1 + LF */ | |
510 | int i; | |
511 | ||
512 | /* In the normal in-process case non-tip request can never happen */ | |
513 | if (!stateless_rpc) | |
514 | goto error; | |
515 | ||
516 | cmd.argv = argv; | |
517 | cmd.git_cmd = 1; | |
518 | cmd.no_stderr = 1; | |
519 | cmd.in = -1; | |
520 | cmd.out = -1; | |
521 | ||
522 | if (start_command(&cmd)) | |
523 | goto error; | |
524 | ||
525 | /* | |
526 | * If rev-list --stdin encounters an unknown commit, it | |
527 | * terminates, which will cause SIGPIPE in the write loop | |
528 | * below. | |
529 | */ | |
530 | sigchain_push(SIGPIPE, SIG_IGN); | |
531 | ||
532 | namebuf[0] = '^'; | |
533 | namebuf[41] = '\n'; | |
534 | for (i = get_max_object_index(); 0 < i; ) { | |
535 | o = get_indexed_object(--i); | |
536 | if (!o) | |
537 | continue; | |
538 | if (!(o->flags & OUR_REF)) | |
539 | continue; | |
540 | memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40); | |
541 | if (write_in_full(cmd.in, namebuf, 42) < 0) | |
542 | goto error; | |
543 | } | |
544 | namebuf[40] = '\n'; | |
545 | for (i = 0; i < want_obj.nr; i++) { | |
546 | o = want_obj.objects[i].item; | |
547 | if (o->flags & OUR_REF) | |
548 | continue; | |
549 | memcpy(namebuf, sha1_to_hex(o->sha1), 40); | |
550 | if (write_in_full(cmd.in, namebuf, 41) < 0) | |
551 | goto error; | |
552 | } | |
553 | close(cmd.in); | |
554 | ||
555 | sigchain_pop(SIGPIPE); | |
556 | ||
557 | /* | |
558 | * The commits out of the rev-list are not ancestors of | |
559 | * our ref. | |
560 | */ | |
561 | i = read_in_full(cmd.out, namebuf, 1); | |
562 | if (i) | |
563 | goto error; | |
564 | close(cmd.out); | |
565 | ||
566 | /* | |
567 | * rev-list may have died by encountering a bad commit | |
568 | * in the history, in which case we do want to bail out | |
569 | * even when it showed no commit. | |
570 | */ | |
571 | if (finish_command(&cmd)) | |
572 | goto error; | |
573 | ||
574 | /* All the non-tip ones are ancestors of what we advertised */ | |
575 | return; | |
576 | ||
577 | error: | |
578 | /* Pick one of them (we know there at least is one) */ | |
579 | for (i = 0; i < want_obj.nr; i++) { | |
580 | o = want_obj.objects[i].item; | |
581 | if (!(o->flags & OUR_REF)) | |
582 | die("git upload-pack: not our ref %s", | |
583 | sha1_to_hex(o->sha1)); | |
584 | } | |
585 | } | |
586 | ||
587 | static void receive_needs(void) | |
588 | { | |
589 | struct object_array shallows = OBJECT_ARRAY_INIT; | |
590 | static char line[1000]; | |
591 | int len, depth = 0; | |
592 | int has_non_tip = 0; | |
593 | ||
594 | shallow_nr = 0; | |
595 | if (debug_fd) | |
596 | write_str_in_full(debug_fd, "#S\n"); | |
597 | for (;;) { | |
598 | struct object *o; | |
599 | unsigned char sha1_buf[20]; | |
600 | len = packet_read_line(0, line, sizeof(line)); | |
601 | reset_timeout(); | |
602 | if (!len) | |
603 | break; | |
604 | if (debug_fd) | |
605 | write_in_full(debug_fd, line, len); | |
606 | ||
607 | if (!prefixcmp(line, "shallow ")) { | |
608 | unsigned char sha1[20]; | |
609 | struct object *object; | |
610 | if (get_sha1(line + 8, sha1)) | |
611 | die("invalid shallow line: %s", line); | |
612 | object = parse_object(sha1); | |
613 | if (!object) | |
614 | die("did not find object for %s", line); | |
615 | object->flags |= CLIENT_SHALLOW; | |
616 | add_object_array(object, NULL, &shallows); | |
617 | continue; | |
618 | } | |
619 | if (!prefixcmp(line, "deepen ")) { | |
620 | char *end; | |
621 | depth = strtol(line + 7, &end, 0); | |
622 | if (end == line + 7 || depth <= 0) | |
623 | die("Invalid deepen: %s", line); | |
624 | continue; | |
625 | } | |
626 | if (prefixcmp(line, "want ") || | |
627 | get_sha1_hex(line+5, sha1_buf)) | |
628 | die("git upload-pack: protocol error, " | |
629 | "expected to get sha, not '%s'", line); | |
630 | if (strstr(line+45, "multi_ack_detailed")) | |
631 | multi_ack = 2; | |
632 | else if (strstr(line+45, "multi_ack")) | |
633 | multi_ack = 1; | |
634 | if (strstr(line+45, "no-done")) | |
635 | no_done = 1; | |
636 | if (strstr(line+45, "thin-pack")) | |
637 | use_thin_pack = 1; | |
638 | if (strstr(line+45, "ofs-delta")) | |
639 | use_ofs_delta = 1; | |
640 | if (strstr(line+45, "side-band-64k")) | |
641 | use_sideband = LARGE_PACKET_MAX; | |
642 | else if (strstr(line+45, "side-band")) | |
643 | use_sideband = DEFAULT_PACKET_MAX; | |
644 | if (strstr(line+45, "no-progress")) | |
645 | no_progress = 1; | |
646 | if (strstr(line+45, "include-tag")) | |
647 | use_include_tag = 1; | |
648 | ||
649 | o = lookup_object(sha1_buf); | |
650 | if (!o) | |
651 | die("git upload-pack: not our ref %s", | |
652 | sha1_to_hex(sha1_buf)); | |
653 | if (!(o->flags & WANTED)) { | |
654 | o->flags |= WANTED; | |
655 | if (!(o->flags & OUR_REF)) | |
656 | has_non_tip = 1; | |
657 | add_object_array(o, NULL, &want_obj); | |
658 | } | |
659 | } | |
660 | if (debug_fd) | |
661 | write_str_in_full(debug_fd, "#E\n"); | |
662 | ||
663 | /* | |
664 | * We have sent all our refs already, and the other end | |
665 | * should have chosen out of them. When we are operating | |
666 | * in the stateless RPC mode, however, their choice may | |
667 | * have been based on the set of older refs advertised | |
668 | * by another process that handled the initial request. | |
669 | */ | |
670 | if (has_non_tip) | |
671 | check_non_tip(); | |
672 | ||
673 | if (!use_sideband && daemon_mode) | |
674 | no_progress = 1; | |
675 | ||
676 | if (depth == 0 && shallows.nr == 0) | |
677 | return; | |
678 | if (depth > 0) { | |
679 | struct commit_list *result, *backup; | |
680 | int i; | |
681 | backup = result = get_shallow_commits(&want_obj, depth, | |
682 | SHALLOW, NOT_SHALLOW); | |
683 | while (result) { | |
684 | struct object *object = &result->item->object; | |
685 | if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { | |
686 | packet_write(1, "shallow %s", | |
687 | sha1_to_hex(object->sha1)); | |
688 | register_shallow(object->sha1); | |
689 | shallow_nr++; | |
690 | } | |
691 | result = result->next; | |
692 | } | |
693 | free_commit_list(backup); | |
694 | for (i = 0; i < shallows.nr; i++) { | |
695 | struct object *object = shallows.objects[i].item; | |
696 | if (object->flags & NOT_SHALLOW) { | |
697 | struct commit_list *parents; | |
698 | packet_write(1, "unshallow %s", | |
699 | sha1_to_hex(object->sha1)); | |
700 | object->flags &= ~CLIENT_SHALLOW; | |
701 | /* make sure the real parents are parsed */ | |
702 | unregister_shallow(object->sha1); | |
703 | object->parsed = 0; | |
704 | if (parse_commit((struct commit *)object)) | |
705 | die("invalid commit"); | |
706 | parents = ((struct commit *)object)->parents; | |
707 | while (parents) { | |
708 | add_object_array(&parents->item->object, | |
709 | NULL, &want_obj); | |
710 | parents = parents->next; | |
711 | } | |
712 | add_object_array(object, NULL, &extra_edge_obj); | |
713 | } | |
714 | /* make sure commit traversal conforms to client */ | |
715 | register_shallow(object->sha1); | |
716 | } | |
717 | packet_flush(1); | |
718 | } else | |
719 | if (shallows.nr > 0) { | |
720 | int i; | |
721 | for (i = 0; i < shallows.nr; i++) | |
722 | register_shallow(shallows.objects[i].item->sha1); | |
723 | } | |
724 | ||
725 | shallow_nr += shallows.nr; | |
726 | free(shallows.objects); | |
727 | } | |
728 | ||
729 | static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
730 | { | |
731 | static const char *capabilities = "multi_ack thin-pack side-band" | |
732 | " side-band-64k ofs-delta shallow no-progress" | |
733 | " include-tag multi_ack_detailed"; | |
734 | struct object *o = parse_object(sha1); | |
735 | const char *refname_nons = strip_namespace(refname); | |
736 | ||
737 | if (!o) | |
738 | die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1)); | |
739 | ||
740 | if (capabilities) | |
741 | packet_write(1, "%s %s%c%s%s\n", sha1_to_hex(sha1), refname_nons, | |
742 | 0, capabilities, | |
743 | stateless_rpc ? " no-done" : ""); | |
744 | else | |
745 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons); | |
746 | capabilities = NULL; | |
747 | if (!(o->flags & OUR_REF)) { | |
748 | o->flags |= OUR_REF; | |
749 | nr_our_refs++; | |
750 | } | |
751 | if (o->type == OBJ_TAG) { | |
752 | o = deref_tag(o, refname, 0); | |
753 | if (o) | |
754 | packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname_nons); | |
755 | } | |
756 | return 0; | |
757 | } | |
758 | ||
759 | static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
760 | { | |
761 | struct object *o = parse_object(sha1); | |
762 | if (!o) | |
763 | die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1)); | |
764 | if (!(o->flags & OUR_REF)) { | |
765 | o->flags |= OUR_REF; | |
766 | nr_our_refs++; | |
767 | } | |
768 | return 0; | |
769 | } | |
770 | ||
771 | static void upload_pack(void) | |
772 | { | |
773 | if (advertise_refs || !stateless_rpc) { | |
774 | reset_timeout(); | |
775 | head_ref_namespaced(send_ref, NULL); | |
776 | for_each_namespaced_ref(send_ref, NULL); | |
777 | packet_flush(1); | |
778 | } else { | |
779 | head_ref_namespaced(mark_our_ref, NULL); | |
780 | for_each_namespaced_ref(mark_our_ref, NULL); | |
781 | } | |
782 | if (advertise_refs) | |
783 | return; | |
784 | ||
785 | receive_needs(); | |
786 | if (want_obj.nr) { | |
787 | get_common_commits(); | |
788 | create_pack_file(); | |
789 | } | |
790 | } | |
791 | ||
792 | int main(int argc, char **argv) | |
793 | { | |
794 | char *dir; | |
795 | int i; | |
796 | int strict = 0; | |
797 | ||
798 | packet_trace_identity("upload-pack"); | |
799 | git_extract_argv0_path(argv[0]); | |
800 | read_replace_refs = 0; | |
801 | ||
802 | for (i = 1; i < argc; i++) { | |
803 | char *arg = argv[i]; | |
804 | ||
805 | if (arg[0] != '-') | |
806 | break; | |
807 | if (!strcmp(arg, "--advertise-refs")) { | |
808 | advertise_refs = 1; | |
809 | continue; | |
810 | } | |
811 | if (!strcmp(arg, "--stateless-rpc")) { | |
812 | stateless_rpc = 1; | |
813 | continue; | |
814 | } | |
815 | if (!strcmp(arg, "--strict")) { | |
816 | strict = 1; | |
817 | continue; | |
818 | } | |
819 | if (!prefixcmp(arg, "--timeout=")) { | |
820 | timeout = atoi(arg+10); | |
821 | daemon_mode = 1; | |
822 | continue; | |
823 | } | |
824 | if (!strcmp(arg, "--")) { | |
825 | i++; | |
826 | break; | |
827 | } | |
828 | } | |
829 | ||
830 | if (i != argc-1) | |
831 | usage(upload_pack_usage); | |
832 | ||
833 | setup_path(); | |
834 | ||
835 | dir = argv[i]; | |
836 | ||
837 | if (!enter_repo(dir, strict)) | |
838 | die("'%s' does not appear to be a git repository", dir); | |
839 | if (is_repository_shallow()) | |
840 | die("attempt to fetch/clone from a shallow repository"); | |
841 | if (getenv("GIT_DEBUG_SEND_PACK")) | |
842 | debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK")); | |
843 | upload_pack(); | |
844 | return 0; | |
845 | } |