object: convert parse_object* to take struct object_id
[git/git.git] / upload-pack.c
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 "connect.h"
14 #include "sigchain.h"
15 #include "version.h"
16 #include "string-list.h"
17 #include "parse-options.h"
18 #include "argv-array.h"
19 #include "prio-queue.h"
20
21 static const char * const upload_pack_usage[] = {
22 N_("git upload-pack [<options>] <dir>"),
23 NULL
24 };
25
26 /* Remember to update object flag allocation in object.h */
27 #define THEY_HAVE (1u << 11)
28 #define OUR_REF (1u << 12)
29 #define WANTED (1u << 13)
30 #define COMMON_KNOWN (1u << 14)
31 #define REACHABLE (1u << 15)
32
33 #define SHALLOW (1u << 16)
34 #define NOT_SHALLOW (1u << 17)
35 #define CLIENT_SHALLOW (1u << 18)
36 #define HIDDEN_REF (1u << 19)
37
38 static unsigned long oldest_have;
39
40 static int deepen_relative;
41 static int multi_ack;
42 static int no_done;
43 static int use_thin_pack, use_ofs_delta, use_include_tag;
44 static int no_progress, daemon_mode;
45 /* Allow specifying sha1 if it is a ref tip. */
46 #define ALLOW_TIP_SHA1 01
47 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
48 #define ALLOW_REACHABLE_SHA1 02
49 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
50 #define ALLOW_ANY_SHA1 07
51 static unsigned int allow_unadvertised_object_request;
52 static int shallow_nr;
53 static struct object_array have_obj;
54 static struct object_array want_obj;
55 static struct object_array extra_edge_obj;
56 static unsigned int timeout;
57 static int keepalive = 5;
58 /* 0 for no sideband,
59 * otherwise maximum packet size (up to 65520 bytes).
60 */
61 static int use_sideband;
62 static int advertise_refs;
63 static int stateless_rpc;
64 static const char *pack_objects_hook;
65
66 static void reset_timeout(void)
67 {
68 alarm(timeout);
69 }
70
71 static void send_client_data(int fd, const char *data, ssize_t sz)
72 {
73 if (use_sideband) {
74 send_sideband(1, fd, data, sz, use_sideband);
75 return;
76 }
77 if (fd == 3)
78 /* emergency quit */
79 fd = 2;
80 if (fd == 2) {
81 /* XXX: are we happy to lose stuff here? */
82 xwrite(fd, data, sz);
83 return;
84 }
85 write_or_die(fd, data, sz);
86 }
87
88 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
89 {
90 FILE *fp = cb_data;
91 if (graft->nr_parent == -1)
92 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
93 return 0;
94 }
95
96 static void create_pack_file(void)
97 {
98 struct child_process pack_objects = CHILD_PROCESS_INIT;
99 char data[8193], progress[128];
100 char abort_msg[] = "aborting due to possible repository "
101 "corruption on the remote side.";
102 int buffered = -1;
103 ssize_t sz;
104 int i;
105 FILE *pipe_fd;
106
107 if (!pack_objects_hook)
108 pack_objects.git_cmd = 1;
109 else {
110 argv_array_push(&pack_objects.args, pack_objects_hook);
111 argv_array_push(&pack_objects.args, "git");
112 pack_objects.use_shell = 1;
113 }
114
115 if (shallow_nr) {
116 argv_array_push(&pack_objects.args, "--shallow-file");
117 argv_array_push(&pack_objects.args, "");
118 }
119 argv_array_push(&pack_objects.args, "pack-objects");
120 argv_array_push(&pack_objects.args, "--revs");
121 if (use_thin_pack)
122 argv_array_push(&pack_objects.args, "--thin");
123
124 argv_array_push(&pack_objects.args, "--stdout");
125 if (shallow_nr)
126 argv_array_push(&pack_objects.args, "--shallow");
127 if (!no_progress)
128 argv_array_push(&pack_objects.args, "--progress");
129 if (use_ofs_delta)
130 argv_array_push(&pack_objects.args, "--delta-base-offset");
131 if (use_include_tag)
132 argv_array_push(&pack_objects.args, "--include-tag");
133
134 pack_objects.in = -1;
135 pack_objects.out = -1;
136 pack_objects.err = -1;
137
138 if (start_command(&pack_objects))
139 die("git upload-pack: unable to fork git-pack-objects");
140
141 pipe_fd = xfdopen(pack_objects.in, "w");
142
143 if (shallow_nr)
144 for_each_commit_graft(write_one_shallow, pipe_fd);
145
146 for (i = 0; i < want_obj.nr; i++)
147 fprintf(pipe_fd, "%s\n",
148 oid_to_hex(&want_obj.objects[i].item->oid));
149 fprintf(pipe_fd, "--not\n");
150 for (i = 0; i < have_obj.nr; i++)
151 fprintf(pipe_fd, "%s\n",
152 oid_to_hex(&have_obj.objects[i].item->oid));
153 for (i = 0; i < extra_edge_obj.nr; i++)
154 fprintf(pipe_fd, "%s\n",
155 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
156 fprintf(pipe_fd, "\n");
157 fflush(pipe_fd);
158 fclose(pipe_fd);
159
160 /* We read from pack_objects.err to capture stderr output for
161 * progress bar, and pack_objects.out to capture the pack data.
162 */
163
164 while (1) {
165 struct pollfd pfd[2];
166 int pe, pu, pollsize;
167 int ret;
168
169 reset_timeout();
170
171 pollsize = 0;
172 pe = pu = -1;
173
174 if (0 <= pack_objects.out) {
175 pfd[pollsize].fd = pack_objects.out;
176 pfd[pollsize].events = POLLIN;
177 pu = pollsize;
178 pollsize++;
179 }
180 if (0 <= pack_objects.err) {
181 pfd[pollsize].fd = pack_objects.err;
182 pfd[pollsize].events = POLLIN;
183 pe = pollsize;
184 pollsize++;
185 }
186
187 if (!pollsize)
188 break;
189
190 ret = poll(pfd, pollsize,
191 keepalive < 0 ? -1 : 1000 * keepalive);
192
193 if (ret < 0) {
194 if (errno != EINTR) {
195 error_errno("poll failed, resuming");
196 sleep(1);
197 }
198 continue;
199 }
200 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
201 /* Status ready; we ship that in the side-band
202 * or dump to the standard error.
203 */
204 sz = xread(pack_objects.err, progress,
205 sizeof(progress));
206 if (0 < sz)
207 send_client_data(2, progress, sz);
208 else if (sz == 0) {
209 close(pack_objects.err);
210 pack_objects.err = -1;
211 }
212 else
213 goto fail;
214 /* give priority to status messages */
215 continue;
216 }
217 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
218 /* Data ready; we keep the last byte to ourselves
219 * in case we detect broken rev-list, so that we
220 * can leave the stream corrupted. This is
221 * unfortunate -- unpack-objects would happily
222 * accept a valid packdata with trailing garbage,
223 * so appending garbage after we pass all the
224 * pack data is not good enough to signal
225 * breakage to downstream.
226 */
227 char *cp = data;
228 ssize_t outsz = 0;
229 if (0 <= buffered) {
230 *cp++ = buffered;
231 outsz++;
232 }
233 sz = xread(pack_objects.out, cp,
234 sizeof(data) - outsz);
235 if (0 < sz)
236 ;
237 else if (sz == 0) {
238 close(pack_objects.out);
239 pack_objects.out = -1;
240 }
241 else
242 goto fail;
243 sz += outsz;
244 if (1 < sz) {
245 buffered = data[sz-1] & 0xFF;
246 sz--;
247 }
248 else
249 buffered = -1;
250 send_client_data(1, data, sz);
251 }
252
253 /*
254 * We hit the keepalive timeout without saying anything; send
255 * an empty message on the data sideband just to let the other
256 * side know we're still working on it, but don't have any data
257 * yet.
258 *
259 * If we don't have a sideband channel, there's no room in the
260 * protocol to say anything, so those clients are just out of
261 * luck.
262 */
263 if (!ret && use_sideband) {
264 static const char buf[] = "0005\1";
265 write_or_die(1, buf, 5);
266 }
267 }
268
269 if (finish_command(&pack_objects)) {
270 error("git upload-pack: git-pack-objects died with error.");
271 goto fail;
272 }
273
274 /* flush the data */
275 if (0 <= buffered) {
276 data[0] = buffered;
277 send_client_data(1, data, 1);
278 fprintf(stderr, "flushed.\n");
279 }
280 if (use_sideband)
281 packet_flush(1);
282 return;
283
284 fail:
285 send_client_data(3, abort_msg, sizeof(abort_msg));
286 die("git upload-pack: %s", abort_msg);
287 }
288
289 static int got_oid(const char *hex, struct object_id *oid)
290 {
291 struct object *o;
292 int we_knew_they_have = 0;
293
294 if (get_oid_hex(hex, oid))
295 die("git upload-pack: expected SHA1 object, got '%s'", hex);
296 if (!has_object_file(oid))
297 return -1;
298
299 o = parse_object(oid);
300 if (!o)
301 die("oops (%s)", oid_to_hex(oid));
302 if (o->type == OBJ_COMMIT) {
303 struct commit_list *parents;
304 struct commit *commit = (struct commit *)o;
305 if (o->flags & THEY_HAVE)
306 we_knew_they_have = 1;
307 else
308 o->flags |= THEY_HAVE;
309 if (!oldest_have || (commit->date < oldest_have))
310 oldest_have = commit->date;
311 for (parents = commit->parents;
312 parents;
313 parents = parents->next)
314 parents->item->object.flags |= THEY_HAVE;
315 }
316 if (!we_knew_they_have) {
317 add_object_array(o, NULL, &have_obj);
318 return 1;
319 }
320 return 0;
321 }
322
323 static int reachable(struct commit *want)
324 {
325 struct prio_queue work = { compare_commits_by_commit_date };
326
327 prio_queue_put(&work, want);
328 while (work.nr) {
329 struct commit_list *list;
330 struct commit *commit = prio_queue_get(&work);
331
332 if (commit->object.flags & THEY_HAVE) {
333 want->object.flags |= COMMON_KNOWN;
334 break;
335 }
336 if (!commit->object.parsed)
337 parse_object(&commit->object.oid);
338 if (commit->object.flags & REACHABLE)
339 continue;
340 commit->object.flags |= REACHABLE;
341 if (commit->date < oldest_have)
342 continue;
343 for (list = commit->parents; list; list = list->next) {
344 struct commit *parent = list->item;
345 if (!(parent->object.flags & REACHABLE))
346 prio_queue_put(&work, parent);
347 }
348 }
349 want->object.flags |= REACHABLE;
350 clear_commit_marks(want, REACHABLE);
351 clear_prio_queue(&work);
352 return (want->object.flags & COMMON_KNOWN);
353 }
354
355 static int ok_to_give_up(void)
356 {
357 int i;
358
359 if (!have_obj.nr)
360 return 0;
361
362 for (i = 0; i < want_obj.nr; i++) {
363 struct object *want = want_obj.objects[i].item;
364
365 if (want->flags & COMMON_KNOWN)
366 continue;
367 want = deref_tag(want, "a want line", 0);
368 if (!want || want->type != OBJ_COMMIT) {
369 /* no way to tell if this is reachable by
370 * looking at the ancestry chain alone, so
371 * leave a note to ourselves not to worry about
372 * this object anymore.
373 */
374 want_obj.objects[i].item->flags |= COMMON_KNOWN;
375 continue;
376 }
377 if (!reachable((struct commit *)want))
378 return 0;
379 }
380 return 1;
381 }
382
383 static int get_common_commits(void)
384 {
385 struct object_id oid;
386 char last_hex[GIT_MAX_HEXSZ + 1];
387 int got_common = 0;
388 int got_other = 0;
389 int sent_ready = 0;
390
391 save_commit_buffer = 0;
392
393 for (;;) {
394 char *line = packet_read_line(0, NULL);
395 const char *arg;
396
397 reset_timeout();
398
399 if (!line) {
400 if (multi_ack == 2 && got_common
401 && !got_other && ok_to_give_up()) {
402 sent_ready = 1;
403 packet_write_fmt(1, "ACK %s ready\n", last_hex);
404 }
405 if (have_obj.nr == 0 || multi_ack)
406 packet_write_fmt(1, "NAK\n");
407
408 if (no_done && sent_ready) {
409 packet_write_fmt(1, "ACK %s\n", last_hex);
410 return 0;
411 }
412 if (stateless_rpc)
413 exit(0);
414 got_common = 0;
415 got_other = 0;
416 continue;
417 }
418 if (skip_prefix(line, "have ", &arg)) {
419 switch (got_oid(arg, &oid)) {
420 case -1: /* they have what we do not */
421 got_other = 1;
422 if (multi_ack && ok_to_give_up()) {
423 const char *hex = oid_to_hex(&oid);
424 if (multi_ack == 2) {
425 sent_ready = 1;
426 packet_write_fmt(1, "ACK %s ready\n", hex);
427 } else
428 packet_write_fmt(1, "ACK %s continue\n", hex);
429 }
430 break;
431 default:
432 got_common = 1;
433 memcpy(last_hex, oid_to_hex(&oid), 41);
434 if (multi_ack == 2)
435 packet_write_fmt(1, "ACK %s common\n", last_hex);
436 else if (multi_ack)
437 packet_write_fmt(1, "ACK %s continue\n", last_hex);
438 else if (have_obj.nr == 1)
439 packet_write_fmt(1, "ACK %s\n", last_hex);
440 break;
441 }
442 continue;
443 }
444 if (!strcmp(line, "done")) {
445 if (have_obj.nr > 0) {
446 if (multi_ack)
447 packet_write_fmt(1, "ACK %s\n", last_hex);
448 return 0;
449 }
450 packet_write_fmt(1, "NAK\n");
451 return -1;
452 }
453 die("git upload-pack: expected SHA1 list, got '%s'", line);
454 }
455 }
456
457 static int is_our_ref(struct object *o)
458 {
459 int allow_hidden_ref = (allow_unadvertised_object_request &
460 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
461 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
462 }
463
464 /*
465 * on successful case, it's up to the caller to close cmd->out
466 */
467 static int do_reachable_revlist(struct child_process *cmd,
468 struct object_array *src,
469 struct object_array *reachable)
470 {
471 static const char *argv[] = {
472 "rev-list", "--stdin", NULL,
473 };
474 struct object *o;
475 char namebuf[42]; /* ^ + SHA-1 + LF */
476 int i;
477
478 cmd->argv = argv;
479 cmd->git_cmd = 1;
480 cmd->no_stderr = 1;
481 cmd->in = -1;
482 cmd->out = -1;
483
484 /*
485 * If the next rev-list --stdin encounters an unknown commit,
486 * it terminates, which will cause SIGPIPE in the write loop
487 * below.
488 */
489 sigchain_push(SIGPIPE, SIG_IGN);
490
491 if (start_command(cmd))
492 goto error;
493
494 namebuf[0] = '^';
495 namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
496 for (i = get_max_object_index(); 0 < i; ) {
497 o = get_indexed_object(--i);
498 if (!o)
499 continue;
500 if (reachable && o->type == OBJ_COMMIT)
501 o->flags &= ~TMP_MARK;
502 if (!is_our_ref(o))
503 continue;
504 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
505 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
506 goto error;
507 }
508 namebuf[GIT_SHA1_HEXSZ] = '\n';
509 for (i = 0; i < src->nr; i++) {
510 o = src->objects[i].item;
511 if (is_our_ref(o)) {
512 if (reachable)
513 add_object_array(o, NULL, reachable);
514 continue;
515 }
516 if (reachable && o->type == OBJ_COMMIT)
517 o->flags |= TMP_MARK;
518 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
519 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
520 goto error;
521 }
522 close(cmd->in);
523 cmd->in = -1;
524 sigchain_pop(SIGPIPE);
525
526 return 0;
527
528 error:
529 sigchain_pop(SIGPIPE);
530
531 if (cmd->in >= 0)
532 close(cmd->in);
533 if (cmd->out >= 0)
534 close(cmd->out);
535 return -1;
536 }
537
538 static int get_reachable_list(struct object_array *src,
539 struct object_array *reachable)
540 {
541 struct child_process cmd = CHILD_PROCESS_INIT;
542 int i;
543 struct object *o;
544 char namebuf[42]; /* ^ + SHA-1 + LF */
545
546 if (do_reachable_revlist(&cmd, src, reachable) < 0)
547 return -1;
548
549 while ((i = read_in_full(cmd.out, namebuf, 41)) == 41) {
550 struct object_id sha1;
551
552 if (namebuf[40] != '\n' || get_oid_hex(namebuf, &sha1))
553 break;
554
555 o = lookup_object(sha1.hash);
556 if (o && o->type == OBJ_COMMIT) {
557 o->flags &= ~TMP_MARK;
558 }
559 }
560 for (i = get_max_object_index(); 0 < i; i--) {
561 o = get_indexed_object(i - 1);
562 if (o && o->type == OBJ_COMMIT &&
563 (o->flags & TMP_MARK)) {
564 add_object_array(o, NULL, reachable);
565 o->flags &= ~TMP_MARK;
566 }
567 }
568 close(cmd.out);
569
570 if (finish_command(&cmd))
571 return -1;
572
573 return 0;
574 }
575
576 static int has_unreachable(struct object_array *src)
577 {
578 struct child_process cmd = CHILD_PROCESS_INIT;
579 char buf[1];
580 int i;
581
582 if (do_reachable_revlist(&cmd, src, NULL) < 0)
583 return 1;
584
585 /*
586 * The commits out of the rev-list are not ancestors of
587 * our ref.
588 */
589 i = read_in_full(cmd.out, buf, 1);
590 if (i)
591 goto error;
592 close(cmd.out);
593 cmd.out = -1;
594
595 /*
596 * rev-list may have died by encountering a bad commit
597 * in the history, in which case we do want to bail out
598 * even when it showed no commit.
599 */
600 if (finish_command(&cmd))
601 goto error;
602
603 /* All the non-tip ones are ancestors of what we advertised */
604 return 0;
605
606 error:
607 sigchain_pop(SIGPIPE);
608 if (cmd.out >= 0)
609 close(cmd.out);
610 return 1;
611 }
612
613 static void check_non_tip(void)
614 {
615 int i;
616
617 /*
618 * In the normal in-process case without
619 * uploadpack.allowReachableSHA1InWant,
620 * non-tip requests can never happen.
621 */
622 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
623 goto error;
624 if (!has_unreachable(&want_obj))
625 /* All the non-tip ones are ancestors of what we advertised */
626 return;
627
628 error:
629 /* Pick one of them (we know there at least is one) */
630 for (i = 0; i < want_obj.nr; i++) {
631 struct object *o = want_obj.objects[i].item;
632 if (!is_our_ref(o))
633 die("git upload-pack: not our ref %s",
634 oid_to_hex(&o->oid));
635 }
636 }
637
638 static void send_shallow(struct commit_list *result)
639 {
640 while (result) {
641 struct object *object = &result->item->object;
642 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
643 packet_write_fmt(1, "shallow %s",
644 oid_to_hex(&object->oid));
645 register_shallow(&object->oid);
646 shallow_nr++;
647 }
648 result = result->next;
649 }
650 }
651
652 static void send_unshallow(const struct object_array *shallows)
653 {
654 int i;
655
656 for (i = 0; i < shallows->nr; i++) {
657 struct object *object = shallows->objects[i].item;
658 if (object->flags & NOT_SHALLOW) {
659 struct commit_list *parents;
660 packet_write_fmt(1, "unshallow %s",
661 oid_to_hex(&object->oid));
662 object->flags &= ~CLIENT_SHALLOW;
663 /*
664 * We want to _register_ "object" as shallow, but we
665 * also need to traverse object's parents to deepen a
666 * shallow clone. Unregister it for now so we can
667 * parse and add the parents to the want list, then
668 * re-register it.
669 */
670 unregister_shallow(&object->oid);
671 object->parsed = 0;
672 parse_commit_or_die((struct commit *)object);
673 parents = ((struct commit *)object)->parents;
674 while (parents) {
675 add_object_array(&parents->item->object,
676 NULL, &want_obj);
677 parents = parents->next;
678 }
679 add_object_array(object, NULL, &extra_edge_obj);
680 }
681 /* make sure commit traversal conforms to client */
682 register_shallow(&object->oid);
683 }
684 }
685
686 static void deepen(int depth, int deepen_relative,
687 struct object_array *shallows)
688 {
689 if (depth == INFINITE_DEPTH && !is_repository_shallow()) {
690 int i;
691
692 for (i = 0; i < shallows->nr; i++) {
693 struct object *object = shallows->objects[i].item;
694 object->flags |= NOT_SHALLOW;
695 }
696 } else if (deepen_relative) {
697 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
698 struct commit_list *result;
699
700 get_reachable_list(shallows, &reachable_shallows);
701 result = get_shallow_commits(&reachable_shallows,
702 depth + 1,
703 SHALLOW, NOT_SHALLOW);
704 send_shallow(result);
705 free_commit_list(result);
706 object_array_clear(&reachable_shallows);
707 } else {
708 struct commit_list *result;
709
710 result = get_shallow_commits(&want_obj, depth,
711 SHALLOW, NOT_SHALLOW);
712 send_shallow(result);
713 free_commit_list(result);
714 }
715
716 send_unshallow(shallows);
717 packet_flush(1);
718 }
719
720 static void deepen_by_rev_list(int ac, const char **av,
721 struct object_array *shallows)
722 {
723 struct commit_list *result;
724
725 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
726 send_shallow(result);
727 free_commit_list(result);
728 send_unshallow(shallows);
729 packet_flush(1);
730 }
731
732 static void receive_needs(void)
733 {
734 struct object_array shallows = OBJECT_ARRAY_INIT;
735 struct string_list deepen_not = STRING_LIST_INIT_DUP;
736 int depth = 0;
737 int has_non_tip = 0;
738 unsigned long deepen_since = 0;
739 int deepen_rev_list = 0;
740
741 shallow_nr = 0;
742 for (;;) {
743 struct object *o;
744 const char *features;
745 struct object_id oid_buf;
746 char *line = packet_read_line(0, NULL);
747 const char *arg;
748
749 reset_timeout();
750 if (!line)
751 break;
752
753 if (skip_prefix(line, "shallow ", &arg)) {
754 struct object_id oid;
755 struct object *object;
756 if (get_oid_hex(arg, &oid))
757 die("invalid shallow line: %s", line);
758 object = parse_object(&oid);
759 if (!object)
760 continue;
761 if (object->type != OBJ_COMMIT)
762 die("invalid shallow object %s", oid_to_hex(&oid));
763 if (!(object->flags & CLIENT_SHALLOW)) {
764 object->flags |= CLIENT_SHALLOW;
765 add_object_array(object, NULL, &shallows);
766 }
767 continue;
768 }
769 if (skip_prefix(line, "deepen ", &arg)) {
770 char *end = NULL;
771 depth = strtol(arg, &end, 0);
772 if (!end || *end || depth <= 0)
773 die("Invalid deepen: %s", line);
774 continue;
775 }
776 if (skip_prefix(line, "deepen-since ", &arg)) {
777 char *end = NULL;
778 deepen_since = strtoul(arg, &end, 0);
779 if (!end || *end || !deepen_since ||
780 /* revisions.c's max_age -1 is special */
781 deepen_since == -1)
782 die("Invalid deepen-since: %s", line);
783 deepen_rev_list = 1;
784 continue;
785 }
786 if (skip_prefix(line, "deepen-not ", &arg)) {
787 char *ref = NULL;
788 struct object_id oid;
789 if (expand_ref(arg, strlen(arg), oid.hash, &ref) != 1)
790 die("git upload-pack: ambiguous deepen-not: %s", line);
791 string_list_append(&deepen_not, ref);
792 free(ref);
793 deepen_rev_list = 1;
794 continue;
795 }
796 if (!skip_prefix(line, "want ", &arg) ||
797 get_oid_hex(arg, &oid_buf))
798 die("git upload-pack: protocol error, "
799 "expected to get sha, not '%s'", line);
800
801 features = arg + 40;
802
803 if (parse_feature_request(features, "deepen-relative"))
804 deepen_relative = 1;
805 if (parse_feature_request(features, "multi_ack_detailed"))
806 multi_ack = 2;
807 else if (parse_feature_request(features, "multi_ack"))
808 multi_ack = 1;
809 if (parse_feature_request(features, "no-done"))
810 no_done = 1;
811 if (parse_feature_request(features, "thin-pack"))
812 use_thin_pack = 1;
813 if (parse_feature_request(features, "ofs-delta"))
814 use_ofs_delta = 1;
815 if (parse_feature_request(features, "side-band-64k"))
816 use_sideband = LARGE_PACKET_MAX;
817 else if (parse_feature_request(features, "side-band"))
818 use_sideband = DEFAULT_PACKET_MAX;
819 if (parse_feature_request(features, "no-progress"))
820 no_progress = 1;
821 if (parse_feature_request(features, "include-tag"))
822 use_include_tag = 1;
823
824 o = parse_object(&oid_buf);
825 if (!o) {
826 packet_write_fmt(1,
827 "ERR upload-pack: not our ref %s",
828 oid_to_hex(&oid_buf));
829 die("git upload-pack: not our ref %s",
830 oid_to_hex(&oid_buf));
831 }
832 if (!(o->flags & WANTED)) {
833 o->flags |= WANTED;
834 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
835 || is_our_ref(o)))
836 has_non_tip = 1;
837 add_object_array(o, NULL, &want_obj);
838 }
839 }
840
841 /*
842 * We have sent all our refs already, and the other end
843 * should have chosen out of them. When we are operating
844 * in the stateless RPC mode, however, their choice may
845 * have been based on the set of older refs advertised
846 * by another process that handled the initial request.
847 */
848 if (has_non_tip)
849 check_non_tip();
850
851 if (!use_sideband && daemon_mode)
852 no_progress = 1;
853
854 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
855 return;
856 if (depth > 0 && deepen_rev_list)
857 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
858 if (depth > 0)
859 deepen(depth, deepen_relative, &shallows);
860 else if (deepen_rev_list) {
861 struct argv_array av = ARGV_ARRAY_INIT;
862 int i;
863
864 argv_array_push(&av, "rev-list");
865 if (deepen_since)
866 argv_array_pushf(&av, "--max-age=%lu", deepen_since);
867 if (deepen_not.nr) {
868 argv_array_push(&av, "--not");
869 for (i = 0; i < deepen_not.nr; i++) {
870 struct string_list_item *s = deepen_not.items + i;
871 argv_array_push(&av, s->string);
872 }
873 argv_array_push(&av, "--not");
874 }
875 for (i = 0; i < want_obj.nr; i++) {
876 struct object *o = want_obj.objects[i].item;
877 argv_array_push(&av, oid_to_hex(&o->oid));
878 }
879 deepen_by_rev_list(av.argc, av.argv, &shallows);
880 argv_array_clear(&av);
881 }
882 else
883 if (shallows.nr > 0) {
884 int i;
885 for (i = 0; i < shallows.nr; i++)
886 register_shallow(&shallows.objects[i].item->oid);
887 }
888
889 shallow_nr += shallows.nr;
890 free(shallows.objects);
891 }
892
893 /* return non-zero if the ref is hidden, otherwise 0 */
894 static int mark_our_ref(const char *refname, const char *refname_full,
895 const struct object_id *oid)
896 {
897 struct object *o = lookup_unknown_object(oid->hash);
898
899 if (ref_is_hidden(refname, refname_full)) {
900 o->flags |= HIDDEN_REF;
901 return 1;
902 }
903 o->flags |= OUR_REF;
904 return 0;
905 }
906
907 static int check_ref(const char *refname_full, const struct object_id *oid,
908 int flag, void *cb_data)
909 {
910 const char *refname = strip_namespace(refname_full);
911
912 mark_our_ref(refname, refname_full, oid);
913 return 0;
914 }
915
916 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
917 {
918 struct string_list_item *item;
919
920 if (!symref->nr)
921 return;
922 for_each_string_list_item(item, symref)
923 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
924 }
925
926 static int send_ref(const char *refname, const struct object_id *oid,
927 int flag, void *cb_data)
928 {
929 static const char *capabilities = "multi_ack thin-pack side-band"
930 " side-band-64k ofs-delta shallow deepen-since deepen-not"
931 " deepen-relative no-progress include-tag multi_ack_detailed";
932 const char *refname_nons = strip_namespace(refname);
933 struct object_id peeled;
934
935 if (mark_our_ref(refname_nons, refname, oid))
936 return 0;
937
938 if (capabilities) {
939 struct strbuf symref_info = STRBUF_INIT;
940
941 format_symref_info(&symref_info, cb_data);
942 packet_write_fmt(1, "%s %s%c%s%s%s%s%s agent=%s\n",
943 oid_to_hex(oid), refname_nons,
944 0, capabilities,
945 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
946 " allow-tip-sha1-in-want" : "",
947 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
948 " allow-reachable-sha1-in-want" : "",
949 stateless_rpc ? " no-done" : "",
950 symref_info.buf,
951 git_user_agent_sanitized());
952 strbuf_release(&symref_info);
953 } else {
954 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
955 }
956 capabilities = NULL;
957 if (!peel_ref(refname, peeled.hash))
958 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
959 return 0;
960 }
961
962 static int find_symref(const char *refname, const struct object_id *oid,
963 int flag, void *cb_data)
964 {
965 const char *symref_target;
966 struct string_list_item *item;
967 struct object_id unused;
968
969 if ((flag & REF_ISSYMREF) == 0)
970 return 0;
971 symref_target = resolve_ref_unsafe(refname, 0, unused.hash, &flag);
972 if (!symref_target || (flag & REF_ISSYMREF) == 0)
973 die("'%s' is a symref but it is not?", refname);
974 item = string_list_append(cb_data, refname);
975 item->util = xstrdup(symref_target);
976 return 0;
977 }
978
979 static void upload_pack(void)
980 {
981 struct string_list symref = STRING_LIST_INIT_DUP;
982
983 head_ref_namespaced(find_symref, &symref);
984
985 if (advertise_refs || !stateless_rpc) {
986 reset_timeout();
987 head_ref_namespaced(send_ref, &symref);
988 for_each_namespaced_ref(send_ref, &symref);
989 advertise_shallow_grafts(1);
990 packet_flush(1);
991 } else {
992 head_ref_namespaced(check_ref, NULL);
993 for_each_namespaced_ref(check_ref, NULL);
994 }
995 string_list_clear(&symref, 1);
996 if (advertise_refs)
997 return;
998
999 receive_needs();
1000 if (want_obj.nr) {
1001 get_common_commits();
1002 create_pack_file();
1003 }
1004 }
1005
1006 static int upload_pack_config(const char *var, const char *value, void *unused)
1007 {
1008 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1009 if (git_config_bool(var, value))
1010 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1011 else
1012 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1013 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1014 if (git_config_bool(var, value))
1015 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1016 else
1017 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1018 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1019 if (git_config_bool(var, value))
1020 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1021 else
1022 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1023 } else if (!strcmp("uploadpack.keepalive", var)) {
1024 keepalive = git_config_int(var, value);
1025 if (!keepalive)
1026 keepalive = -1;
1027 } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1028 if (!strcmp("uploadpack.packobjectshook", var))
1029 return git_config_string(&pack_objects_hook, var, value);
1030 }
1031 return parse_hide_refs_config(var, value, "uploadpack");
1032 }
1033
1034 int cmd_main(int argc, const char **argv)
1035 {
1036 const char *dir;
1037 int strict = 0;
1038 struct option options[] = {
1039 OPT_BOOL(0, "stateless-rpc", &stateless_rpc,
1040 N_("quit after a single request/response exchange")),
1041 OPT_BOOL(0, "advertise-refs", &advertise_refs,
1042 N_("exit immediately after initial ref advertisement")),
1043 OPT_BOOL(0, "strict", &strict,
1044 N_("do not try <directory>/.git/ if <directory> is no Git directory")),
1045 OPT_INTEGER(0, "timeout", &timeout,
1046 N_("interrupt transfer after <n> seconds of inactivity")),
1047 OPT_END()
1048 };
1049
1050 packet_trace_identity("upload-pack");
1051 check_replace_refs = 0;
1052
1053 argc = parse_options(argc, argv, NULL, options, upload_pack_usage, 0);
1054
1055 if (argc != 1)
1056 usage_with_options(upload_pack_usage, options);
1057
1058 if (timeout)
1059 daemon_mode = 1;
1060
1061 setup_path();
1062
1063 dir = argv[0];
1064
1065 if (!enter_repo(dir, strict))
1066 die("'%s' does not appear to be a git repository", dir);
1067
1068 git_config(upload_pack_config, NULL);
1069 upload_pack();
1070 return 0;
1071 }