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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 | #include "version.h" | |
15 | #include "string-list.h" | |
16 | ||
17 | static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>"; | |
18 | ||
19 | /* bits #0..7 in revision.h, #8..10 in commit.c */ | |
20 | #define THEY_HAVE (1u << 11) | |
21 | #define OUR_REF (1u << 12) | |
22 | #define WANTED (1u << 13) | |
23 | #define COMMON_KNOWN (1u << 14) | |
24 | #define REACHABLE (1u << 15) | |
25 | ||
26 | #define SHALLOW (1u << 16) | |
27 | #define NOT_SHALLOW (1u << 17) | |
28 | #define CLIENT_SHALLOW (1u << 18) | |
29 | #define HIDDEN_REF (1u << 19) | |
30 | ||
31 | static unsigned long oldest_have; | |
32 | ||
33 | static int multi_ack; | |
34 | static int no_done; | |
35 | static int use_thin_pack, use_ofs_delta, use_include_tag; | |
36 | static int no_progress, daemon_mode; | |
37 | static int allow_tip_sha1_in_want; | |
38 | static int shallow_nr; | |
39 | static struct object_array have_obj; | |
40 | static struct object_array want_obj; | |
41 | static struct object_array extra_edge_obj; | |
42 | static unsigned int timeout; | |
43 | /* 0 for no sideband, | |
44 | * otherwise maximum packet size (up to 65520 bytes). | |
45 | */ | |
46 | static int use_sideband; | |
47 | static int advertise_refs; | |
48 | static int stateless_rpc; | |
49 | ||
50 | static void reset_timeout(void) | |
51 | { | |
52 | alarm(timeout); | |
53 | } | |
54 | ||
55 | static ssize_t send_client_data(int fd, const char *data, ssize_t sz) | |
56 | { | |
57 | if (use_sideband) | |
58 | return send_sideband(1, fd, data, sz, use_sideband); | |
59 | if (fd == 3) | |
60 | /* emergency quit */ | |
61 | fd = 2; | |
62 | if (fd == 2) { | |
63 | /* XXX: are we happy to lose stuff here? */ | |
64 | xwrite(fd, data, sz); | |
65 | return sz; | |
66 | } | |
67 | write_or_die(fd, data, sz); | |
68 | return sz; | |
69 | } | |
70 | ||
71 | static FILE *pack_pipe = NULL; | |
72 | static void show_commit(struct commit *commit, void *data) | |
73 | { | |
74 | if (commit->object.flags & BOUNDARY) | |
75 | fputc('-', pack_pipe); | |
76 | if (fputs(sha1_to_hex(commit->object.sha1), pack_pipe) < 0) | |
77 | die("broken output pipe"); | |
78 | fputc('\n', pack_pipe); | |
79 | fflush(pack_pipe); | |
80 | free(commit->buffer); | |
81 | commit->buffer = NULL; | |
82 | } | |
83 | ||
84 | static void show_object(struct object *obj, | |
85 | const struct name_path *path, const char *component, | |
86 | void *cb_data) | |
87 | { | |
88 | show_object_with_name(pack_pipe, obj, path, component); | |
89 | } | |
90 | ||
91 | static void show_edge(struct commit *commit) | |
92 | { | |
93 | fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1)); | |
94 | } | |
95 | ||
96 | static int do_rev_list(int in, int out, void *user_data) | |
97 | { | |
98 | int i; | |
99 | struct rev_info revs; | |
100 | ||
101 | pack_pipe = xfdopen(out, "w"); | |
102 | init_revisions(&revs, NULL); | |
103 | revs.tag_objects = 1; | |
104 | revs.tree_objects = 1; | |
105 | revs.blob_objects = 1; | |
106 | if (use_thin_pack) | |
107 | revs.edge_hint = 1; | |
108 | ||
109 | for (i = 0; i < want_obj.nr; i++) { | |
110 | struct object *o = want_obj.objects[i].item; | |
111 | /* why??? */ | |
112 | o->flags &= ~UNINTERESTING; | |
113 | add_pending_object(&revs, o, NULL); | |
114 | } | |
115 | for (i = 0; i < have_obj.nr; i++) { | |
116 | struct object *o = have_obj.objects[i].item; | |
117 | o->flags |= UNINTERESTING; | |
118 | add_pending_object(&revs, o, NULL); | |
119 | } | |
120 | setup_revisions(0, NULL, &revs, NULL); | |
121 | if (prepare_revision_walk(&revs)) | |
122 | die("revision walk setup failed"); | |
123 | mark_edges_uninteresting(revs.commits, &revs, show_edge); | |
124 | if (use_thin_pack) | |
125 | for (i = 0; i < extra_edge_obj.nr; i++) | |
126 | fprintf(pack_pipe, "-%s\n", sha1_to_hex( | |
127 | extra_edge_obj.objects[i].item->sha1)); | |
128 | traverse_commit_list(&revs, show_commit, show_object, NULL); | |
129 | fflush(pack_pipe); | |
130 | fclose(pack_pipe); | |
131 | return 0; | |
132 | } | |
133 | ||
134 | static void create_pack_file(void) | |
135 | { | |
136 | struct async rev_list; | |
137 | struct child_process pack_objects; | |
138 | char data[8193], progress[128]; | |
139 | char abort_msg[] = "aborting due to possible repository " | |
140 | "corruption on the remote side."; | |
141 | int buffered = -1; | |
142 | ssize_t sz; | |
143 | const char *argv[10]; | |
144 | int arg = 0; | |
145 | ||
146 | argv[arg++] = "pack-objects"; | |
147 | if (!shallow_nr) { | |
148 | argv[arg++] = "--revs"; | |
149 | if (use_thin_pack) | |
150 | argv[arg++] = "--thin"; | |
151 | } | |
152 | ||
153 | argv[arg++] = "--stdout"; | |
154 | if (!no_progress) | |
155 | argv[arg++] = "--progress"; | |
156 | if (use_ofs_delta) | |
157 | argv[arg++] = "--delta-base-offset"; | |
158 | if (use_include_tag) | |
159 | argv[arg++] = "--include-tag"; | |
160 | argv[arg++] = NULL; | |
161 | ||
162 | memset(&pack_objects, 0, sizeof(pack_objects)); | |
163 | pack_objects.in = -1; | |
164 | pack_objects.out = -1; | |
165 | pack_objects.err = -1; | |
166 | pack_objects.git_cmd = 1; | |
167 | pack_objects.argv = argv; | |
168 | ||
169 | if (start_command(&pack_objects)) | |
170 | die("git upload-pack: unable to fork git-pack-objects"); | |
171 | ||
172 | if (shallow_nr) { | |
173 | memset(&rev_list, 0, sizeof(rev_list)); | |
174 | rev_list.proc = do_rev_list; | |
175 | rev_list.out = pack_objects.in; | |
176 | if (start_async(&rev_list)) | |
177 | die("git upload-pack: unable to fork git-rev-list"); | |
178 | } | |
179 | else { | |
180 | FILE *pipe_fd = xfdopen(pack_objects.in, "w"); | |
181 | int i; | |
182 | ||
183 | for (i = 0; i < want_obj.nr; i++) | |
184 | fprintf(pipe_fd, "%s\n", | |
185 | sha1_to_hex(want_obj.objects[i].item->sha1)); | |
186 | fprintf(pipe_fd, "--not\n"); | |
187 | for (i = 0; i < have_obj.nr; i++) | |
188 | fprintf(pipe_fd, "%s\n", | |
189 | sha1_to_hex(have_obj.objects[i].item->sha1)); | |
190 | fprintf(pipe_fd, "\n"); | |
191 | fflush(pipe_fd); | |
192 | fclose(pipe_fd); | |
193 | } | |
194 | ||
195 | ||
196 | /* We read from pack_objects.err to capture stderr output for | |
197 | * progress bar, and pack_objects.out to capture the pack data. | |
198 | */ | |
199 | ||
200 | while (1) { | |
201 | struct pollfd pfd[2]; | |
202 | int pe, pu, pollsize; | |
203 | ||
204 | reset_timeout(); | |
205 | ||
206 | pollsize = 0; | |
207 | pe = pu = -1; | |
208 | ||
209 | if (0 <= pack_objects.out) { | |
210 | pfd[pollsize].fd = pack_objects.out; | |
211 | pfd[pollsize].events = POLLIN; | |
212 | pu = pollsize; | |
213 | pollsize++; | |
214 | } | |
215 | if (0 <= pack_objects.err) { | |
216 | pfd[pollsize].fd = pack_objects.err; | |
217 | pfd[pollsize].events = POLLIN; | |
218 | pe = pollsize; | |
219 | pollsize++; | |
220 | } | |
221 | ||
222 | if (!pollsize) | |
223 | break; | |
224 | ||
225 | if (poll(pfd, pollsize, -1) < 0) { | |
226 | if (errno != EINTR) { | |
227 | error("poll failed, resuming: %s", | |
228 | strerror(errno)); | |
229 | sleep(1); | |
230 | } | |
231 | continue; | |
232 | } | |
233 | if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) { | |
234 | /* Status ready; we ship that in the side-band | |
235 | * or dump to the standard error. | |
236 | */ | |
237 | sz = xread(pack_objects.err, progress, | |
238 | sizeof(progress)); | |
239 | if (0 < sz) | |
240 | send_client_data(2, progress, sz); | |
241 | else if (sz == 0) { | |
242 | close(pack_objects.err); | |
243 | pack_objects.err = -1; | |
244 | } | |
245 | else | |
246 | goto fail; | |
247 | /* give priority to status messages */ | |
248 | continue; | |
249 | } | |
250 | if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) { | |
251 | /* Data ready; we keep the last byte to ourselves | |
252 | * in case we detect broken rev-list, so that we | |
253 | * can leave the stream corrupted. This is | |
254 | * unfortunate -- unpack-objects would happily | |
255 | * accept a valid packdata with trailing garbage, | |
256 | * so appending garbage after we pass all the | |
257 | * pack data is not good enough to signal | |
258 | * breakage to downstream. | |
259 | */ | |
260 | char *cp = data; | |
261 | ssize_t outsz = 0; | |
262 | if (0 <= buffered) { | |
263 | *cp++ = buffered; | |
264 | outsz++; | |
265 | } | |
266 | sz = xread(pack_objects.out, cp, | |
267 | sizeof(data) - outsz); | |
268 | if (0 < sz) | |
269 | ; | |
270 | else if (sz == 0) { | |
271 | close(pack_objects.out); | |
272 | pack_objects.out = -1; | |
273 | } | |
274 | else | |
275 | goto fail; | |
276 | sz += outsz; | |
277 | if (1 < sz) { | |
278 | buffered = data[sz-1] & 0xFF; | |
279 | sz--; | |
280 | } | |
281 | else | |
282 | buffered = -1; | |
283 | sz = send_client_data(1, data, sz); | |
284 | if (sz < 0) | |
285 | goto fail; | |
286 | } | |
287 | } | |
288 | ||
289 | if (finish_command(&pack_objects)) { | |
290 | error("git upload-pack: git-pack-objects died with error."); | |
291 | goto fail; | |
292 | } | |
293 | if (shallow_nr && finish_async(&rev_list)) | |
294 | goto fail; /* error was already reported */ | |
295 | ||
296 | /* flush the data */ | |
297 | if (0 <= buffered) { | |
298 | data[0] = buffered; | |
299 | sz = send_client_data(1, data, 1); | |
300 | if (sz < 0) | |
301 | goto fail; | |
302 | fprintf(stderr, "flushed.\n"); | |
303 | } | |
304 | if (use_sideband) | |
305 | packet_flush(1); | |
306 | return; | |
307 | ||
308 | fail: | |
309 | send_client_data(3, abort_msg, sizeof(abort_msg)); | |
310 | die("git upload-pack: %s", abort_msg); | |
311 | } | |
312 | ||
313 | static int got_sha1(char *hex, unsigned char *sha1) | |
314 | { | |
315 | struct object *o; | |
316 | int we_knew_they_have = 0; | |
317 | ||
318 | if (get_sha1_hex(hex, sha1)) | |
319 | die("git upload-pack: expected SHA1 object, got '%s'", hex); | |
320 | if (!has_sha1_file(sha1)) | |
321 | return -1; | |
322 | ||
323 | o = parse_object(sha1); | |
324 | if (!o) | |
325 | die("oops (%s)", sha1_to_hex(sha1)); | |
326 | if (o->type == OBJ_COMMIT) { | |
327 | struct commit_list *parents; | |
328 | struct commit *commit = (struct commit *)o; | |
329 | if (o->flags & THEY_HAVE) | |
330 | we_knew_they_have = 1; | |
331 | else | |
332 | o->flags |= THEY_HAVE; | |
333 | if (!oldest_have || (commit->date < oldest_have)) | |
334 | oldest_have = commit->date; | |
335 | for (parents = commit->parents; | |
336 | parents; | |
337 | parents = parents->next) | |
338 | parents->item->object.flags |= THEY_HAVE; | |
339 | } | |
340 | if (!we_knew_they_have) { | |
341 | add_object_array(o, NULL, &have_obj); | |
342 | return 1; | |
343 | } | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static int reachable(struct commit *want) | |
348 | { | |
349 | struct commit_list *work = NULL; | |
350 | ||
351 | commit_list_insert_by_date(want, &work); | |
352 | while (work) { | |
353 | struct commit_list *list = work->next; | |
354 | struct commit *commit = work->item; | |
355 | free(work); | |
356 | work = list; | |
357 | ||
358 | if (commit->object.flags & THEY_HAVE) { | |
359 | want->object.flags |= COMMON_KNOWN; | |
360 | break; | |
361 | } | |
362 | if (!commit->object.parsed) | |
363 | parse_object(commit->object.sha1); | |
364 | if (commit->object.flags & REACHABLE) | |
365 | continue; | |
366 | commit->object.flags |= REACHABLE; | |
367 | if (commit->date < oldest_have) | |
368 | continue; | |
369 | for (list = commit->parents; list; list = list->next) { | |
370 | struct commit *parent = list->item; | |
371 | if (!(parent->object.flags & REACHABLE)) | |
372 | commit_list_insert_by_date(parent, &work); | |
373 | } | |
374 | } | |
375 | want->object.flags |= REACHABLE; | |
376 | clear_commit_marks(want, REACHABLE); | |
377 | free_commit_list(work); | |
378 | return (want->object.flags & COMMON_KNOWN); | |
379 | } | |
380 | ||
381 | static int ok_to_give_up(void) | |
382 | { | |
383 | int i; | |
384 | ||
385 | if (!have_obj.nr) | |
386 | return 0; | |
387 | ||
388 | for (i = 0; i < want_obj.nr; i++) { | |
389 | struct object *want = want_obj.objects[i].item; | |
390 | ||
391 | if (want->flags & COMMON_KNOWN) | |
392 | continue; | |
393 | want = deref_tag(want, "a want line", 0); | |
394 | if (!want || want->type != OBJ_COMMIT) { | |
395 | /* no way to tell if this is reachable by | |
396 | * looking at the ancestry chain alone, so | |
397 | * leave a note to ourselves not to worry about | |
398 | * this object anymore. | |
399 | */ | |
400 | want_obj.objects[i].item->flags |= COMMON_KNOWN; | |
401 | continue; | |
402 | } | |
403 | if (!reachable((struct commit *)want)) | |
404 | return 0; | |
405 | } | |
406 | return 1; | |
407 | } | |
408 | ||
409 | static int get_common_commits(void) | |
410 | { | |
411 | unsigned char sha1[20]; | |
412 | char last_hex[41]; | |
413 | int got_common = 0; | |
414 | int got_other = 0; | |
415 | int sent_ready = 0; | |
416 | ||
417 | save_commit_buffer = 0; | |
418 | ||
419 | for (;;) { | |
420 | char *line = packet_read_line(0, NULL); | |
421 | reset_timeout(); | |
422 | ||
423 | if (!line) { | |
424 | if (multi_ack == 2 && got_common | |
425 | && !got_other && ok_to_give_up()) { | |
426 | sent_ready = 1; | |
427 | packet_write(1, "ACK %s ready\n", last_hex); | |
428 | } | |
429 | if (have_obj.nr == 0 || multi_ack) | |
430 | packet_write(1, "NAK\n"); | |
431 | ||
432 | if (no_done && sent_ready) { | |
433 | packet_write(1, "ACK %s\n", last_hex); | |
434 | return 0; | |
435 | } | |
436 | if (stateless_rpc) | |
437 | exit(0); | |
438 | got_common = 0; | |
439 | got_other = 0; | |
440 | continue; | |
441 | } | |
442 | if (!prefixcmp(line, "have ")) { | |
443 | switch (got_sha1(line+5, sha1)) { | |
444 | case -1: /* they have what we do not */ | |
445 | got_other = 1; | |
446 | if (multi_ack && ok_to_give_up()) { | |
447 | const char *hex = sha1_to_hex(sha1); | |
448 | if (multi_ack == 2) { | |
449 | sent_ready = 1; | |
450 | packet_write(1, "ACK %s ready\n", hex); | |
451 | } else | |
452 | packet_write(1, "ACK %s continue\n", hex); | |
453 | } | |
454 | break; | |
455 | default: | |
456 | got_common = 1; | |
457 | memcpy(last_hex, sha1_to_hex(sha1), 41); | |
458 | if (multi_ack == 2) | |
459 | packet_write(1, "ACK %s common\n", last_hex); | |
460 | else if (multi_ack) | |
461 | packet_write(1, "ACK %s continue\n", last_hex); | |
462 | else if (have_obj.nr == 1) | |
463 | packet_write(1, "ACK %s\n", last_hex); | |
464 | break; | |
465 | } | |
466 | continue; | |
467 | } | |
468 | if (!strcmp(line, "done")) { | |
469 | if (have_obj.nr > 0) { | |
470 | if (multi_ack) | |
471 | packet_write(1, "ACK %s\n", last_hex); | |
472 | return 0; | |
473 | } | |
474 | packet_write(1, "NAK\n"); | |
475 | return -1; | |
476 | } | |
477 | die("git upload-pack: expected SHA1 list, got '%s'", line); | |
478 | } | |
479 | } | |
480 | ||
481 | static int is_our_ref(struct object *o) | |
482 | { | |
483 | return o->flags & | |
484 | ((allow_tip_sha1_in_want ? HIDDEN_REF : 0) | OUR_REF); | |
485 | } | |
486 | ||
487 | static void check_non_tip(void) | |
488 | { | |
489 | static const char *argv[] = { | |
490 | "rev-list", "--stdin", NULL, | |
491 | }; | |
492 | static struct child_process cmd; | |
493 | struct object *o; | |
494 | char namebuf[42]; /* ^ + SHA-1 + LF */ | |
495 | int i; | |
496 | ||
497 | /* In the normal in-process case non-tip request can never happen */ | |
498 | if (!stateless_rpc) | |
499 | goto error; | |
500 | ||
501 | cmd.argv = argv; | |
502 | cmd.git_cmd = 1; | |
503 | cmd.no_stderr = 1; | |
504 | cmd.in = -1; | |
505 | cmd.out = -1; | |
506 | ||
507 | if (start_command(&cmd)) | |
508 | goto error; | |
509 | ||
510 | /* | |
511 | * If rev-list --stdin encounters an unknown commit, it | |
512 | * terminates, which will cause SIGPIPE in the write loop | |
513 | * below. | |
514 | */ | |
515 | sigchain_push(SIGPIPE, SIG_IGN); | |
516 | ||
517 | namebuf[0] = '^'; | |
518 | namebuf[41] = '\n'; | |
519 | for (i = get_max_object_index(); 0 < i; ) { | |
520 | o = get_indexed_object(--i); | |
521 | if (!o) | |
522 | continue; | |
523 | if (!is_our_ref(o)) | |
524 | continue; | |
525 | memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40); | |
526 | if (write_in_full(cmd.in, namebuf, 42) < 0) | |
527 | goto error; | |
528 | } | |
529 | namebuf[40] = '\n'; | |
530 | for (i = 0; i < want_obj.nr; i++) { | |
531 | o = want_obj.objects[i].item; | |
532 | if (is_our_ref(o)) | |
533 | continue; | |
534 | memcpy(namebuf, sha1_to_hex(o->sha1), 40); | |
535 | if (write_in_full(cmd.in, namebuf, 41) < 0) | |
536 | goto error; | |
537 | } | |
538 | close(cmd.in); | |
539 | ||
540 | sigchain_pop(SIGPIPE); | |
541 | ||
542 | /* | |
543 | * The commits out of the rev-list are not ancestors of | |
544 | * our ref. | |
545 | */ | |
546 | i = read_in_full(cmd.out, namebuf, 1); | |
547 | if (i) | |
548 | goto error; | |
549 | close(cmd.out); | |
550 | ||
551 | /* | |
552 | * rev-list may have died by encountering a bad commit | |
553 | * in the history, in which case we do want to bail out | |
554 | * even when it showed no commit. | |
555 | */ | |
556 | if (finish_command(&cmd)) | |
557 | goto error; | |
558 | ||
559 | /* All the non-tip ones are ancestors of what we advertised */ | |
560 | return; | |
561 | ||
562 | error: | |
563 | /* Pick one of them (we know there at least is one) */ | |
564 | for (i = 0; i < want_obj.nr; i++) { | |
565 | o = want_obj.objects[i].item; | |
566 | if (!is_our_ref(o)) | |
567 | die("git upload-pack: not our ref %s", | |
568 | sha1_to_hex(o->sha1)); | |
569 | } | |
570 | } | |
571 | ||
572 | static void receive_needs(void) | |
573 | { | |
574 | struct object_array shallows = OBJECT_ARRAY_INIT; | |
575 | int depth = 0; | |
576 | int has_non_tip = 0; | |
577 | ||
578 | shallow_nr = 0; | |
579 | for (;;) { | |
580 | struct object *o; | |
581 | const char *features; | |
582 | unsigned char sha1_buf[20]; | |
583 | char *line = packet_read_line(0, NULL); | |
584 | reset_timeout(); | |
585 | if (!line) | |
586 | break; | |
587 | ||
588 | if (!prefixcmp(line, "shallow ")) { | |
589 | unsigned char sha1[20]; | |
590 | struct object *object; | |
591 | if (get_sha1_hex(line + 8, sha1)) | |
592 | die("invalid shallow line: %s", line); | |
593 | object = parse_object(sha1); | |
594 | if (!object) | |
595 | continue; | |
596 | if (object->type != OBJ_COMMIT) | |
597 | die("invalid shallow object %s", sha1_to_hex(sha1)); | |
598 | if (!(object->flags & CLIENT_SHALLOW)) { | |
599 | object->flags |= CLIENT_SHALLOW; | |
600 | add_object_array(object, NULL, &shallows); | |
601 | } | |
602 | continue; | |
603 | } | |
604 | if (!prefixcmp(line, "deepen ")) { | |
605 | char *end; | |
606 | depth = strtol(line + 7, &end, 0); | |
607 | if (end == line + 7 || depth <= 0) | |
608 | die("Invalid deepen: %s", line); | |
609 | continue; | |
610 | } | |
611 | if (prefixcmp(line, "want ") || | |
612 | get_sha1_hex(line+5, sha1_buf)) | |
613 | die("git upload-pack: protocol error, " | |
614 | "expected to get sha, not '%s'", line); | |
615 | ||
616 | features = line + 45; | |
617 | ||
618 | if (parse_feature_request(features, "multi_ack_detailed")) | |
619 | multi_ack = 2; | |
620 | else if (parse_feature_request(features, "multi_ack")) | |
621 | multi_ack = 1; | |
622 | if (parse_feature_request(features, "no-done")) | |
623 | no_done = 1; | |
624 | if (parse_feature_request(features, "thin-pack")) | |
625 | use_thin_pack = 1; | |
626 | if (parse_feature_request(features, "ofs-delta")) | |
627 | use_ofs_delta = 1; | |
628 | if (parse_feature_request(features, "side-band-64k")) | |
629 | use_sideband = LARGE_PACKET_MAX; | |
630 | else if (parse_feature_request(features, "side-band")) | |
631 | use_sideband = DEFAULT_PACKET_MAX; | |
632 | if (parse_feature_request(features, "no-progress")) | |
633 | no_progress = 1; | |
634 | if (parse_feature_request(features, "include-tag")) | |
635 | use_include_tag = 1; | |
636 | ||
637 | o = parse_object(sha1_buf); | |
638 | if (!o) | |
639 | die("git upload-pack: not our ref %s", | |
640 | sha1_to_hex(sha1_buf)); | |
641 | if (!(o->flags & WANTED)) { | |
642 | o->flags |= WANTED; | |
643 | if (!is_our_ref(o)) | |
644 | has_non_tip = 1; | |
645 | add_object_array(o, NULL, &want_obj); | |
646 | } | |
647 | } | |
648 | ||
649 | /* | |
650 | * We have sent all our refs already, and the other end | |
651 | * should have chosen out of them. When we are operating | |
652 | * in the stateless RPC mode, however, their choice may | |
653 | * have been based on the set of older refs advertised | |
654 | * by another process that handled the initial request. | |
655 | */ | |
656 | if (has_non_tip) | |
657 | check_non_tip(); | |
658 | ||
659 | if (!use_sideband && daemon_mode) | |
660 | no_progress = 1; | |
661 | ||
662 | if (depth == 0 && shallows.nr == 0) | |
663 | return; | |
664 | if (depth > 0) { | |
665 | struct commit_list *result = NULL, *backup = NULL; | |
666 | int i; | |
667 | if (depth == INFINITE_DEPTH) | |
668 | for (i = 0; i < shallows.nr; i++) { | |
669 | struct object *object = shallows.objects[i].item; | |
670 | object->flags |= NOT_SHALLOW; | |
671 | } | |
672 | else | |
673 | backup = result = | |
674 | get_shallow_commits(&want_obj, depth, | |
675 | SHALLOW, NOT_SHALLOW); | |
676 | while (result) { | |
677 | struct object *object = &result->item->object; | |
678 | if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { | |
679 | packet_write(1, "shallow %s", | |
680 | sha1_to_hex(object->sha1)); | |
681 | register_shallow(object->sha1); | |
682 | shallow_nr++; | |
683 | } | |
684 | result = result->next; | |
685 | } | |
686 | free_commit_list(backup); | |
687 | for (i = 0; i < shallows.nr; i++) { | |
688 | struct object *object = shallows.objects[i].item; | |
689 | if (object->flags & NOT_SHALLOW) { | |
690 | struct commit_list *parents; | |
691 | packet_write(1, "unshallow %s", | |
692 | sha1_to_hex(object->sha1)); | |
693 | object->flags &= ~CLIENT_SHALLOW; | |
694 | /* make sure the real parents are parsed */ | |
695 | unregister_shallow(object->sha1); | |
696 | object->parsed = 0; | |
697 | if (parse_commit((struct commit *)object)) | |
698 | die("invalid commit"); | |
699 | parents = ((struct commit *)object)->parents; | |
700 | while (parents) { | |
701 | add_object_array(&parents->item->object, | |
702 | NULL, &want_obj); | |
703 | parents = parents->next; | |
704 | } | |
705 | add_object_array(object, NULL, &extra_edge_obj); | |
706 | } | |
707 | /* make sure commit traversal conforms to client */ | |
708 | register_shallow(object->sha1); | |
709 | } | |
710 | packet_flush(1); | |
711 | } else | |
712 | if (shallows.nr > 0) { | |
713 | int i; | |
714 | for (i = 0; i < shallows.nr; i++) | |
715 | register_shallow(shallows.objects[i].item->sha1); | |
716 | } | |
717 | ||
718 | shallow_nr += shallows.nr; | |
719 | free(shallows.objects); | |
720 | } | |
721 | ||
722 | /* return non-zero if the ref is hidden, otherwise 0 */ | |
723 | static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
724 | { | |
725 | struct object *o = lookup_unknown_object(sha1); | |
726 | ||
727 | if (ref_is_hidden(refname)) { | |
728 | o->flags |= HIDDEN_REF; | |
729 | return 1; | |
730 | } | |
731 | if (!o) | |
732 | die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1)); | |
733 | o->flags |= OUR_REF; | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
738 | { | |
739 | static const char *capabilities = "multi_ack thin-pack side-band" | |
740 | " side-band-64k ofs-delta shallow no-progress" | |
741 | " include-tag multi_ack_detailed"; | |
742 | const char *refname_nons = strip_namespace(refname); | |
743 | unsigned char peeled[20]; | |
744 | ||
745 | if (mark_our_ref(refname, sha1, flag, cb_data)) | |
746 | return 0; | |
747 | ||
748 | if (capabilities) | |
749 | packet_write(1, "%s %s%c%s%s%s agent=%s\n", | |
750 | sha1_to_hex(sha1), refname_nons, | |
751 | 0, capabilities, | |
752 | allow_tip_sha1_in_want ? " allow-tip-sha1-in-want" : "", | |
753 | stateless_rpc ? " no-done" : "", | |
754 | git_user_agent_sanitized()); | |
755 | else | |
756 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons); | |
757 | capabilities = NULL; | |
758 | if (!peel_ref(refname, peeled)) | |
759 | packet_write(1, "%s %s^{}\n", sha1_to_hex(peeled), refname_nons); | |
760 | return 0; | |
761 | } | |
762 | ||
763 | static void upload_pack(void) | |
764 | { | |
765 | if (advertise_refs || !stateless_rpc) { | |
766 | reset_timeout(); | |
767 | head_ref_namespaced(send_ref, NULL); | |
768 | for_each_namespaced_ref(send_ref, NULL); | |
769 | packet_flush(1); | |
770 | } else { | |
771 | head_ref_namespaced(mark_our_ref, NULL); | |
772 | for_each_namespaced_ref(mark_our_ref, NULL); | |
773 | } | |
774 | if (advertise_refs) | |
775 | return; | |
776 | ||
777 | receive_needs(); | |
778 | if (want_obj.nr) { | |
779 | get_common_commits(); | |
780 | create_pack_file(); | |
781 | } | |
782 | } | |
783 | ||
784 | static int upload_pack_config(const char *var, const char *value, void *unused) | |
785 | { | |
786 | if (!strcmp("uploadpack.allowtipsha1inwant", var)) | |
787 | allow_tip_sha1_in_want = git_config_bool(var, value); | |
788 | return parse_hide_refs_config(var, value, "uploadpack"); | |
789 | } | |
790 | ||
791 | int main(int argc, char **argv) | |
792 | { | |
793 | char *dir; | |
794 | int i; | |
795 | int strict = 0; | |
796 | ||
797 | git_setup_gettext(); | |
798 | ||
799 | packet_trace_identity("upload-pack"); | |
800 | git_extract_argv0_path(argv[0]); | |
801 | read_replace_refs = 0; | |
802 | ||
803 | for (i = 1; i < argc; i++) { | |
804 | char *arg = argv[i]; | |
805 | ||
806 | if (arg[0] != '-') | |
807 | break; | |
808 | if (!strcmp(arg, "--advertise-refs")) { | |
809 | advertise_refs = 1; | |
810 | continue; | |
811 | } | |
812 | if (!strcmp(arg, "--stateless-rpc")) { | |
813 | stateless_rpc = 1; | |
814 | continue; | |
815 | } | |
816 | if (!strcmp(arg, "--strict")) { | |
817 | strict = 1; | |
818 | continue; | |
819 | } | |
820 | if (!prefixcmp(arg, "--timeout=")) { | |
821 | timeout = atoi(arg+10); | |
822 | daemon_mode = 1; | |
823 | continue; | |
824 | } | |
825 | if (!strcmp(arg, "--")) { | |
826 | i++; | |
827 | break; | |
828 | } | |
829 | } | |
830 | ||
831 | if (i != argc-1) | |
832 | usage(upload_pack_usage); | |
833 | ||
834 | setup_path(); | |
835 | ||
836 | dir = argv[i]; | |
837 | ||
838 | if (!enter_repo(dir, strict)) | |
839 | die("'%s' does not appear to be a git repository", dir); | |
840 | if (is_repository_shallow()) | |
841 | die("attempt to fetch/clone from a shallow repository"); | |
842 | git_config(upload_pack_config, NULL); | |
843 | upload_pack(); | |
844 | return 0; | |
845 | } |