Merge branch 'ah/doc-submodule-ignore-submodules'
[git/git.git] / upload-pack.c
1 #include "cache.h"
2 #include "config.h"
3 #include "refs.h"
4 #include "pkt-line.h"
5 #include "sideband.h"
6 #include "repository.h"
7 #include "object-store.h"
8 #include "tag.h"
9 #include "object.h"
10 #include "commit.h"
11 #include "diff.h"
12 #include "revision.h"
13 #include "list-objects.h"
14 #include "list-objects-filter.h"
15 #include "list-objects-filter-options.h"
16 #include "run-command.h"
17 #include "connect.h"
18 #include "sigchain.h"
19 #include "version.h"
20 #include "string-list.h"
21 #include "argv-array.h"
22 #include "prio-queue.h"
23 #include "protocol.h"
24 #include "quote.h"
25 #include "upload-pack.h"
26 #include "serve.h"
27 #include "commit-graph.h"
28 #include "commit-reach.h"
29
30 /* Remember to update object flag allocation in object.h */
31 #define THEY_HAVE (1u << 11)
32 #define OUR_REF (1u << 12)
33 #define WANTED (1u << 13)
34 #define COMMON_KNOWN (1u << 14)
35
36 #define SHALLOW (1u << 16)
37 #define NOT_SHALLOW (1u << 17)
38 #define CLIENT_SHALLOW (1u << 18)
39 #define HIDDEN_REF (1u << 19)
40
41 #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \
42 NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF)
43
44 static timestamp_t oldest_have;
45
46 static int multi_ack;
47 static int no_done;
48 static int use_thin_pack, use_ofs_delta, use_include_tag;
49 static int no_progress, daemon_mode;
50 /* Allow specifying sha1 if it is a ref tip. */
51 #define ALLOW_TIP_SHA1 01
52 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
53 #define ALLOW_REACHABLE_SHA1 02
54 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
55 #define ALLOW_ANY_SHA1 07
56 static unsigned int allow_unadvertised_object_request;
57 static int shallow_nr;
58 static struct object_array extra_edge_obj;
59 static unsigned int timeout;
60 static int keepalive = 5;
61 /* 0 for no sideband,
62 * otherwise maximum packet size (up to 65520 bytes).
63 */
64 static int use_sideband;
65 static int stateless_rpc;
66 static const char *pack_objects_hook;
67
68 static int filter_capability_requested;
69 static int allow_filter;
70 static int allow_ref_in_want;
71 static struct list_objects_filter_options filter_options;
72
73 static int allow_sideband_all;
74
75 static void reset_timeout(void)
76 {
77 alarm(timeout);
78 }
79
80 static void send_client_data(int fd, const char *data, ssize_t sz)
81 {
82 if (use_sideband) {
83 send_sideband(1, fd, data, sz, use_sideband);
84 return;
85 }
86 if (fd == 3)
87 /* emergency quit */
88 fd = 2;
89 if (fd == 2) {
90 /* XXX: are we happy to lose stuff here? */
91 xwrite(fd, data, sz);
92 return;
93 }
94 write_or_die(fd, data, sz);
95 }
96
97 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
98 {
99 FILE *fp = cb_data;
100 if (graft->nr_parent == -1)
101 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
102 return 0;
103 }
104
105 static void create_pack_file(const struct object_array *have_obj,
106 const struct object_array *want_obj)
107 {
108 struct child_process pack_objects = CHILD_PROCESS_INIT;
109 char data[8193], progress[128];
110 char abort_msg[] = "aborting due to possible repository "
111 "corruption on the remote side.";
112 int buffered = -1;
113 ssize_t sz;
114 int i;
115 FILE *pipe_fd;
116
117 if (!pack_objects_hook)
118 pack_objects.git_cmd = 1;
119 else {
120 argv_array_push(&pack_objects.args, pack_objects_hook);
121 argv_array_push(&pack_objects.args, "git");
122 pack_objects.use_shell = 1;
123 }
124
125 if (shallow_nr) {
126 argv_array_push(&pack_objects.args, "--shallow-file");
127 argv_array_push(&pack_objects.args, "");
128 }
129 argv_array_push(&pack_objects.args, "pack-objects");
130 argv_array_push(&pack_objects.args, "--revs");
131 if (use_thin_pack)
132 argv_array_push(&pack_objects.args, "--thin");
133
134 argv_array_push(&pack_objects.args, "--stdout");
135 if (shallow_nr)
136 argv_array_push(&pack_objects.args, "--shallow");
137 if (!no_progress)
138 argv_array_push(&pack_objects.args, "--progress");
139 if (use_ofs_delta)
140 argv_array_push(&pack_objects.args, "--delta-base-offset");
141 if (use_include_tag)
142 argv_array_push(&pack_objects.args, "--include-tag");
143 if (filter_options.choice) {
144 const char *spec =
145 expand_list_objects_filter_spec(&filter_options);
146 if (pack_objects.use_shell) {
147 struct strbuf buf = STRBUF_INIT;
148 sq_quote_buf(&buf, spec);
149 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
150 strbuf_release(&buf);
151 } else {
152 argv_array_pushf(&pack_objects.args, "--filter=%s",
153 spec);
154 }
155 }
156
157 pack_objects.in = -1;
158 pack_objects.out = -1;
159 pack_objects.err = -1;
160
161 if (start_command(&pack_objects))
162 die("git upload-pack: unable to fork git-pack-objects");
163
164 pipe_fd = xfdopen(pack_objects.in, "w");
165
166 if (shallow_nr)
167 for_each_commit_graft(write_one_shallow, pipe_fd);
168
169 for (i = 0; i < want_obj->nr; i++)
170 fprintf(pipe_fd, "%s\n",
171 oid_to_hex(&want_obj->objects[i].item->oid));
172 fprintf(pipe_fd, "--not\n");
173 for (i = 0; i < have_obj->nr; i++)
174 fprintf(pipe_fd, "%s\n",
175 oid_to_hex(&have_obj->objects[i].item->oid));
176 for (i = 0; i < extra_edge_obj.nr; i++)
177 fprintf(pipe_fd, "%s\n",
178 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
179 fprintf(pipe_fd, "\n");
180 fflush(pipe_fd);
181 fclose(pipe_fd);
182
183 /* We read from pack_objects.err to capture stderr output for
184 * progress bar, and pack_objects.out to capture the pack data.
185 */
186
187 while (1) {
188 struct pollfd pfd[2];
189 int pe, pu, pollsize;
190 int ret;
191
192 reset_timeout();
193
194 pollsize = 0;
195 pe = pu = -1;
196
197 if (0 <= pack_objects.out) {
198 pfd[pollsize].fd = pack_objects.out;
199 pfd[pollsize].events = POLLIN;
200 pu = pollsize;
201 pollsize++;
202 }
203 if (0 <= pack_objects.err) {
204 pfd[pollsize].fd = pack_objects.err;
205 pfd[pollsize].events = POLLIN;
206 pe = pollsize;
207 pollsize++;
208 }
209
210 if (!pollsize)
211 break;
212
213 ret = poll(pfd, pollsize,
214 keepalive < 0 ? -1 : 1000 * keepalive);
215
216 if (ret < 0) {
217 if (errno != EINTR) {
218 error_errno("poll failed, resuming");
219 sleep(1);
220 }
221 continue;
222 }
223 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
224 /* Status ready; we ship that in the side-band
225 * or dump to the standard error.
226 */
227 sz = xread(pack_objects.err, progress,
228 sizeof(progress));
229 if (0 < sz)
230 send_client_data(2, progress, sz);
231 else if (sz == 0) {
232 close(pack_objects.err);
233 pack_objects.err = -1;
234 }
235 else
236 goto fail;
237 /* give priority to status messages */
238 continue;
239 }
240 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
241 /* Data ready; we keep the last byte to ourselves
242 * in case we detect broken rev-list, so that we
243 * can leave the stream corrupted. This is
244 * unfortunate -- unpack-objects would happily
245 * accept a valid packdata with trailing garbage,
246 * so appending garbage after we pass all the
247 * pack data is not good enough to signal
248 * breakage to downstream.
249 */
250 char *cp = data;
251 ssize_t outsz = 0;
252 if (0 <= buffered) {
253 *cp++ = buffered;
254 outsz++;
255 }
256 sz = xread(pack_objects.out, cp,
257 sizeof(data) - outsz);
258 if (0 < sz)
259 ;
260 else if (sz == 0) {
261 close(pack_objects.out);
262 pack_objects.out = -1;
263 }
264 else
265 goto fail;
266 sz += outsz;
267 if (1 < sz) {
268 buffered = data[sz-1] & 0xFF;
269 sz--;
270 }
271 else
272 buffered = -1;
273 send_client_data(1, data, sz);
274 }
275
276 /*
277 * We hit the keepalive timeout without saying anything; send
278 * an empty message on the data sideband just to let the other
279 * side know we're still working on it, but don't have any data
280 * yet.
281 *
282 * If we don't have a sideband channel, there's no room in the
283 * protocol to say anything, so those clients are just out of
284 * luck.
285 */
286 if (!ret && use_sideband) {
287 static const char buf[] = "0005\1";
288 write_or_die(1, buf, 5);
289 }
290 }
291
292 if (finish_command(&pack_objects)) {
293 error("git upload-pack: git-pack-objects died with error.");
294 goto fail;
295 }
296
297 /* flush the data */
298 if (0 <= buffered) {
299 data[0] = buffered;
300 send_client_data(1, data, 1);
301 fprintf(stderr, "flushed.\n");
302 }
303 if (use_sideband)
304 packet_flush(1);
305 return;
306
307 fail:
308 send_client_data(3, abort_msg, sizeof(abort_msg));
309 die("git upload-pack: %s", abort_msg);
310 }
311
312 static int got_oid(const char *hex, struct object_id *oid,
313 struct object_array *have_obj)
314 {
315 struct object *o;
316 int we_knew_they_have = 0;
317
318 if (get_oid_hex(hex, oid))
319 die("git upload-pack: expected SHA1 object, got '%s'", hex);
320 if (!has_object_file(oid))
321 return -1;
322
323 o = parse_object(the_repository, oid);
324 if (!o)
325 die("oops (%s)", oid_to_hex(oid));
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 ok_to_give_up(const struct object_array *have_obj,
348 struct object_array *want_obj)
349 {
350 uint32_t min_generation = GENERATION_NUMBER_ZERO;
351
352 if (!have_obj->nr)
353 return 0;
354
355 return can_all_from_reach_with_flag(want_obj, THEY_HAVE,
356 COMMON_KNOWN, oldest_have,
357 min_generation);
358 }
359
360 static int get_common_commits(struct packet_reader *reader,
361 struct object_array *have_obj,
362 struct object_array *want_obj)
363 {
364 struct object_id oid;
365 char last_hex[GIT_MAX_HEXSZ + 1];
366 int got_common = 0;
367 int got_other = 0;
368 int sent_ready = 0;
369
370 save_commit_buffer = 0;
371
372 for (;;) {
373 const char *arg;
374
375 reset_timeout();
376
377 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
378 if (multi_ack == 2 && got_common
379 && !got_other && ok_to_give_up(have_obj, want_obj)) {
380 sent_ready = 1;
381 packet_write_fmt(1, "ACK %s ready\n", last_hex);
382 }
383 if (have_obj->nr == 0 || multi_ack)
384 packet_write_fmt(1, "NAK\n");
385
386 if (no_done && sent_ready) {
387 packet_write_fmt(1, "ACK %s\n", last_hex);
388 return 0;
389 }
390 if (stateless_rpc)
391 exit(0);
392 got_common = 0;
393 got_other = 0;
394 continue;
395 }
396 if (skip_prefix(reader->line, "have ", &arg)) {
397 switch (got_oid(arg, &oid, have_obj)) {
398 case -1: /* they have what we do not */
399 got_other = 1;
400 if (multi_ack && ok_to_give_up(have_obj, want_obj)) {
401 const char *hex = oid_to_hex(&oid);
402 if (multi_ack == 2) {
403 sent_ready = 1;
404 packet_write_fmt(1, "ACK %s ready\n", hex);
405 } else
406 packet_write_fmt(1, "ACK %s continue\n", hex);
407 }
408 break;
409 default:
410 got_common = 1;
411 oid_to_hex_r(last_hex, &oid);
412 if (multi_ack == 2)
413 packet_write_fmt(1, "ACK %s common\n", last_hex);
414 else if (multi_ack)
415 packet_write_fmt(1, "ACK %s continue\n", last_hex);
416 else if (have_obj->nr == 1)
417 packet_write_fmt(1, "ACK %s\n", last_hex);
418 break;
419 }
420 continue;
421 }
422 if (!strcmp(reader->line, "done")) {
423 if (have_obj->nr > 0) {
424 if (multi_ack)
425 packet_write_fmt(1, "ACK %s\n", last_hex);
426 return 0;
427 }
428 packet_write_fmt(1, "NAK\n");
429 return -1;
430 }
431 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
432 }
433 }
434
435 static int is_our_ref(struct object *o)
436 {
437 int allow_hidden_ref = (allow_unadvertised_object_request &
438 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
439 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
440 }
441
442 /*
443 * on successful case, it's up to the caller to close cmd->out
444 */
445 static int do_reachable_revlist(struct child_process *cmd,
446 struct object_array *src,
447 struct object_array *reachable)
448 {
449 static const char *argv[] = {
450 "rev-list", "--stdin", NULL,
451 };
452 struct object *o;
453 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
454 int i;
455 const unsigned hexsz = the_hash_algo->hexsz;
456
457 cmd->argv = argv;
458 cmd->git_cmd = 1;
459 cmd->no_stderr = 1;
460 cmd->in = -1;
461 cmd->out = -1;
462
463 /*
464 * If the next rev-list --stdin encounters an unknown commit,
465 * it terminates, which will cause SIGPIPE in the write loop
466 * below.
467 */
468 sigchain_push(SIGPIPE, SIG_IGN);
469
470 if (start_command(cmd))
471 goto error;
472
473 namebuf[0] = '^';
474 namebuf[hexsz + 1] = '\n';
475 for (i = get_max_object_index(); 0 < i; ) {
476 o = get_indexed_object(--i);
477 if (!o)
478 continue;
479 if (reachable && o->type == OBJ_COMMIT)
480 o->flags &= ~TMP_MARK;
481 if (!is_our_ref(o))
482 continue;
483 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
484 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
485 goto error;
486 }
487 namebuf[hexsz] = '\n';
488 for (i = 0; i < src->nr; i++) {
489 o = src->objects[i].item;
490 if (is_our_ref(o)) {
491 if (reachable)
492 add_object_array(o, NULL, reachable);
493 continue;
494 }
495 if (reachable && o->type == OBJ_COMMIT)
496 o->flags |= TMP_MARK;
497 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
498 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
499 goto error;
500 }
501 close(cmd->in);
502 cmd->in = -1;
503 sigchain_pop(SIGPIPE);
504
505 return 0;
506
507 error:
508 sigchain_pop(SIGPIPE);
509
510 if (cmd->in >= 0)
511 close(cmd->in);
512 if (cmd->out >= 0)
513 close(cmd->out);
514 return -1;
515 }
516
517 static int get_reachable_list(struct object_array *src,
518 struct object_array *reachable)
519 {
520 struct child_process cmd = CHILD_PROCESS_INIT;
521 int i;
522 struct object *o;
523 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
524 const unsigned hexsz = the_hash_algo->hexsz;
525
526 if (do_reachable_revlist(&cmd, src, reachable) < 0)
527 return -1;
528
529 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
530 struct object_id oid;
531 const char *p;
532
533 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
534 break;
535
536 o = lookup_object(the_repository, &oid);
537 if (o && o->type == OBJ_COMMIT) {
538 o->flags &= ~TMP_MARK;
539 }
540 }
541 for (i = get_max_object_index(); 0 < i; i--) {
542 o = get_indexed_object(i - 1);
543 if (o && o->type == OBJ_COMMIT &&
544 (o->flags & TMP_MARK)) {
545 add_object_array(o, NULL, reachable);
546 o->flags &= ~TMP_MARK;
547 }
548 }
549 close(cmd.out);
550
551 if (finish_command(&cmd))
552 return -1;
553
554 return 0;
555 }
556
557 static int has_unreachable(struct object_array *src)
558 {
559 struct child_process cmd = CHILD_PROCESS_INIT;
560 char buf[1];
561 int i;
562
563 if (do_reachable_revlist(&cmd, src, NULL) < 0)
564 return 1;
565
566 /*
567 * The commits out of the rev-list are not ancestors of
568 * our ref.
569 */
570 i = read_in_full(cmd.out, buf, 1);
571 if (i)
572 goto error;
573 close(cmd.out);
574 cmd.out = -1;
575
576 /*
577 * rev-list may have died by encountering a bad commit
578 * in the history, in which case we do want to bail out
579 * even when it showed no commit.
580 */
581 if (finish_command(&cmd))
582 goto error;
583
584 /* All the non-tip ones are ancestors of what we advertised */
585 return 0;
586
587 error:
588 sigchain_pop(SIGPIPE);
589 if (cmd.out >= 0)
590 close(cmd.out);
591 return 1;
592 }
593
594 static void check_non_tip(struct object_array *want_obj,
595 struct packet_writer *writer)
596 {
597 int i;
598
599 /*
600 * In the normal in-process case without
601 * uploadpack.allowReachableSHA1InWant,
602 * non-tip requests can never happen.
603 */
604 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
605 goto error;
606 if (!has_unreachable(want_obj))
607 /* All the non-tip ones are ancestors of what we advertised */
608 return;
609
610 error:
611 /* Pick one of them (we know there at least is one) */
612 for (i = 0; i < want_obj->nr; i++) {
613 struct object *o = want_obj->objects[i].item;
614 if (!is_our_ref(o)) {
615 packet_writer_error(writer,
616 "upload-pack: not our ref %s",
617 oid_to_hex(&o->oid));
618 die("git upload-pack: not our ref %s",
619 oid_to_hex(&o->oid));
620 }
621 }
622 }
623
624 static void send_shallow(struct packet_writer *writer,
625 struct commit_list *result)
626 {
627 while (result) {
628 struct object *object = &result->item->object;
629 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
630 packet_writer_write(writer, "shallow %s",
631 oid_to_hex(&object->oid));
632 register_shallow(the_repository, &object->oid);
633 shallow_nr++;
634 }
635 result = result->next;
636 }
637 }
638
639 static void send_unshallow(struct packet_writer *writer,
640 const struct object_array *shallows,
641 struct object_array *want_obj)
642 {
643 int i;
644
645 for (i = 0; i < shallows->nr; i++) {
646 struct object *object = shallows->objects[i].item;
647 if (object->flags & NOT_SHALLOW) {
648 struct commit_list *parents;
649 packet_writer_write(writer, "unshallow %s",
650 oid_to_hex(&object->oid));
651 object->flags &= ~CLIENT_SHALLOW;
652 /*
653 * We want to _register_ "object" as shallow, but we
654 * also need to traverse object's parents to deepen a
655 * shallow clone. Unregister it for now so we can
656 * parse and add the parents to the want list, then
657 * re-register it.
658 */
659 unregister_shallow(&object->oid);
660 object->parsed = 0;
661 parse_commit_or_die((struct commit *)object);
662 parents = ((struct commit *)object)->parents;
663 while (parents) {
664 add_object_array(&parents->item->object,
665 NULL, want_obj);
666 parents = parents->next;
667 }
668 add_object_array(object, NULL, &extra_edge_obj);
669 }
670 /* make sure commit traversal conforms to client */
671 register_shallow(the_repository, &object->oid);
672 }
673 }
674
675 static int check_ref(const char *refname_full, const struct object_id *oid,
676 int flag, void *cb_data);
677 static void deepen(struct packet_writer *writer, int depth, int deepen_relative,
678 struct object_array *shallows, struct object_array *want_obj)
679 {
680 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
681 int i;
682
683 for (i = 0; i < shallows->nr; i++) {
684 struct object *object = shallows->objects[i].item;
685 object->flags |= NOT_SHALLOW;
686 }
687 } else if (deepen_relative) {
688 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
689 struct commit_list *result;
690
691 /*
692 * Checking for reachable shallows requires that our refs be
693 * marked with OUR_REF.
694 */
695 head_ref_namespaced(check_ref, NULL);
696 for_each_namespaced_ref(check_ref, NULL);
697
698 get_reachable_list(shallows, &reachable_shallows);
699 result = get_shallow_commits(&reachable_shallows,
700 depth + 1,
701 SHALLOW, NOT_SHALLOW);
702 send_shallow(writer, result);
703 free_commit_list(result);
704 object_array_clear(&reachable_shallows);
705 } else {
706 struct commit_list *result;
707
708 result = get_shallow_commits(want_obj, depth,
709 SHALLOW, NOT_SHALLOW);
710 send_shallow(writer, result);
711 free_commit_list(result);
712 }
713
714 send_unshallow(writer, shallows, want_obj);
715 }
716
717 static void deepen_by_rev_list(struct packet_writer *writer, int ac,
718 const char **av,
719 struct object_array *shallows,
720 struct object_array *want_obj)
721 {
722 struct commit_list *result;
723
724 disable_commit_graph(the_repository);
725 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
726 send_shallow(writer, result);
727 free_commit_list(result);
728 send_unshallow(writer, shallows, want_obj);
729 }
730
731 /* Returns 1 if a shallow list is sent or 0 otherwise */
732 static int send_shallow_list(struct packet_writer *writer,
733 int depth, int deepen_rev_list,
734 timestamp_t deepen_since,
735 struct string_list *deepen_not,
736 int deepen_relative,
737 struct object_array *shallows,
738 struct object_array *want_obj)
739 {
740 int ret = 0;
741
742 if (depth > 0 && deepen_rev_list)
743 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
744 if (depth > 0) {
745 deepen(writer, depth, deepen_relative, shallows, want_obj);
746 ret = 1;
747 } else if (deepen_rev_list) {
748 struct argv_array av = ARGV_ARRAY_INIT;
749 int i;
750
751 argv_array_push(&av, "rev-list");
752 if (deepen_since)
753 argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
754 if (deepen_not->nr) {
755 argv_array_push(&av, "--not");
756 for (i = 0; i < deepen_not->nr; i++) {
757 struct string_list_item *s = deepen_not->items + i;
758 argv_array_push(&av, s->string);
759 }
760 argv_array_push(&av, "--not");
761 }
762 for (i = 0; i < want_obj->nr; i++) {
763 struct object *o = want_obj->objects[i].item;
764 argv_array_push(&av, oid_to_hex(&o->oid));
765 }
766 deepen_by_rev_list(writer, av.argc, av.argv, shallows, want_obj);
767 argv_array_clear(&av);
768 ret = 1;
769 } else {
770 if (shallows->nr > 0) {
771 int i;
772 for (i = 0; i < shallows->nr; i++)
773 register_shallow(the_repository,
774 &shallows->objects[i].item->oid);
775 }
776 }
777
778 shallow_nr += shallows->nr;
779 return ret;
780 }
781
782 static int process_shallow(const char *line, struct object_array *shallows)
783 {
784 const char *arg;
785 if (skip_prefix(line, "shallow ", &arg)) {
786 struct object_id oid;
787 struct object *object;
788 if (get_oid_hex(arg, &oid))
789 die("invalid shallow line: %s", line);
790 object = parse_object(the_repository, &oid);
791 if (!object)
792 return 1;
793 if (object->type != OBJ_COMMIT)
794 die("invalid shallow object %s", oid_to_hex(&oid));
795 if (!(object->flags & CLIENT_SHALLOW)) {
796 object->flags |= CLIENT_SHALLOW;
797 add_object_array(object, NULL, shallows);
798 }
799 return 1;
800 }
801
802 return 0;
803 }
804
805 static int process_deepen(const char *line, int *depth)
806 {
807 const char *arg;
808 if (skip_prefix(line, "deepen ", &arg)) {
809 char *end = NULL;
810 *depth = (int)strtol(arg, &end, 0);
811 if (!end || *end || *depth <= 0)
812 die("Invalid deepen: %s", line);
813 return 1;
814 }
815
816 return 0;
817 }
818
819 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
820 {
821 const char *arg;
822 if (skip_prefix(line, "deepen-since ", &arg)) {
823 char *end = NULL;
824 *deepen_since = parse_timestamp(arg, &end, 0);
825 if (!end || *end || !deepen_since ||
826 /* revisions.c's max_age -1 is special */
827 *deepen_since == -1)
828 die("Invalid deepen-since: %s", line);
829 *deepen_rev_list = 1;
830 return 1;
831 }
832 return 0;
833 }
834
835 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
836 {
837 const char *arg;
838 if (skip_prefix(line, "deepen-not ", &arg)) {
839 char *ref = NULL;
840 struct object_id oid;
841 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
842 die("git upload-pack: ambiguous deepen-not: %s", line);
843 string_list_append(deepen_not, ref);
844 free(ref);
845 *deepen_rev_list = 1;
846 return 1;
847 }
848 return 0;
849 }
850
851 static void receive_needs(struct packet_reader *reader, struct object_array *want_obj)
852 {
853 struct object_array shallows = OBJECT_ARRAY_INIT;
854 struct string_list deepen_not = STRING_LIST_INIT_DUP;
855 int depth = 0;
856 int has_non_tip = 0;
857 timestamp_t deepen_since = 0;
858 int deepen_rev_list = 0;
859 int deepen_relative = 0;
860 struct packet_writer writer;
861
862 shallow_nr = 0;
863 packet_writer_init(&writer, 1);
864 for (;;) {
865 struct object *o;
866 const char *features;
867 struct object_id oid_buf;
868 const char *arg;
869
870 reset_timeout();
871 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
872 break;
873
874 if (process_shallow(reader->line, &shallows))
875 continue;
876 if (process_deepen(reader->line, &depth))
877 continue;
878 if (process_deepen_since(reader->line, &deepen_since, &deepen_rev_list))
879 continue;
880 if (process_deepen_not(reader->line, &deepen_not, &deepen_rev_list))
881 continue;
882
883 if (skip_prefix(reader->line, "filter ", &arg)) {
884 if (!filter_capability_requested)
885 die("git upload-pack: filtering capability not negotiated");
886 list_objects_filter_die_if_populated(&filter_options);
887 parse_list_objects_filter(&filter_options, arg);
888 continue;
889 }
890
891 if (!skip_prefix(reader->line, "want ", &arg) ||
892 parse_oid_hex(arg, &oid_buf, &features))
893 die("git upload-pack: protocol error, "
894 "expected to get object ID, not '%s'", reader->line);
895
896 if (parse_feature_request(features, "deepen-relative"))
897 deepen_relative = 1;
898 if (parse_feature_request(features, "multi_ack_detailed"))
899 multi_ack = 2;
900 else if (parse_feature_request(features, "multi_ack"))
901 multi_ack = 1;
902 if (parse_feature_request(features, "no-done"))
903 no_done = 1;
904 if (parse_feature_request(features, "thin-pack"))
905 use_thin_pack = 1;
906 if (parse_feature_request(features, "ofs-delta"))
907 use_ofs_delta = 1;
908 if (parse_feature_request(features, "side-band-64k"))
909 use_sideband = LARGE_PACKET_MAX;
910 else if (parse_feature_request(features, "side-band"))
911 use_sideband = DEFAULT_PACKET_MAX;
912 if (parse_feature_request(features, "no-progress"))
913 no_progress = 1;
914 if (parse_feature_request(features, "include-tag"))
915 use_include_tag = 1;
916 if (allow_filter && parse_feature_request(features, "filter"))
917 filter_capability_requested = 1;
918
919 o = parse_object(the_repository, &oid_buf);
920 if (!o) {
921 packet_writer_error(&writer,
922 "upload-pack: not our ref %s",
923 oid_to_hex(&oid_buf));
924 die("git upload-pack: not our ref %s",
925 oid_to_hex(&oid_buf));
926 }
927 if (!(o->flags & WANTED)) {
928 o->flags |= WANTED;
929 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
930 || is_our_ref(o)))
931 has_non_tip = 1;
932 add_object_array(o, NULL, want_obj);
933 }
934 }
935
936 /*
937 * We have sent all our refs already, and the other end
938 * should have chosen out of them. When we are operating
939 * in the stateless RPC mode, however, their choice may
940 * have been based on the set of older refs advertised
941 * by another process that handled the initial request.
942 */
943 if (has_non_tip)
944 check_non_tip(want_obj, &writer);
945
946 if (!use_sideband && daemon_mode)
947 no_progress = 1;
948
949 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
950 return;
951
952 if (send_shallow_list(&writer, depth, deepen_rev_list, deepen_since,
953 &deepen_not, deepen_relative, &shallows,
954 want_obj))
955 packet_flush(1);
956 object_array_clear(&shallows);
957 }
958
959 /* return non-zero if the ref is hidden, otherwise 0 */
960 static int mark_our_ref(const char *refname, const char *refname_full,
961 const struct object_id *oid)
962 {
963 struct object *o = lookup_unknown_object(oid);
964
965 if (ref_is_hidden(refname, refname_full)) {
966 o->flags |= HIDDEN_REF;
967 return 1;
968 }
969 o->flags |= OUR_REF;
970 return 0;
971 }
972
973 static int check_ref(const char *refname_full, const struct object_id *oid,
974 int flag, void *cb_data)
975 {
976 const char *refname = strip_namespace(refname_full);
977
978 mark_our_ref(refname, refname_full, oid);
979 return 0;
980 }
981
982 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
983 {
984 struct string_list_item *item;
985
986 if (!symref->nr)
987 return;
988 for_each_string_list_item(item, symref)
989 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
990 }
991
992 static int send_ref(const char *refname, const struct object_id *oid,
993 int flag, void *cb_data)
994 {
995 static const char *capabilities = "multi_ack thin-pack side-band"
996 " side-band-64k ofs-delta shallow deepen-since deepen-not"
997 " deepen-relative no-progress include-tag multi_ack_detailed";
998 const char *refname_nons = strip_namespace(refname);
999 struct object_id peeled;
1000
1001 if (mark_our_ref(refname_nons, refname, oid))
1002 return 0;
1003
1004 if (capabilities) {
1005 struct strbuf symref_info = STRBUF_INIT;
1006
1007 format_symref_info(&symref_info, cb_data);
1008 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
1009 oid_to_hex(oid), refname_nons,
1010 0, capabilities,
1011 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
1012 " allow-tip-sha1-in-want" : "",
1013 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
1014 " allow-reachable-sha1-in-want" : "",
1015 stateless_rpc ? " no-done" : "",
1016 symref_info.buf,
1017 allow_filter ? " filter" : "",
1018 git_user_agent_sanitized());
1019 strbuf_release(&symref_info);
1020 } else {
1021 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1022 }
1023 capabilities = NULL;
1024 if (!peel_ref(refname, &peeled))
1025 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1026 return 0;
1027 }
1028
1029 static int find_symref(const char *refname, const struct object_id *oid,
1030 int flag, void *cb_data)
1031 {
1032 const char *symref_target;
1033 struct string_list_item *item;
1034
1035 if ((flag & REF_ISSYMREF) == 0)
1036 return 0;
1037 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1038 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1039 die("'%s' is a symref but it is not?", refname);
1040 item = string_list_append(cb_data, strip_namespace(refname));
1041 item->util = xstrdup(strip_namespace(symref_target));
1042 return 0;
1043 }
1044
1045 static int upload_pack_config(const char *var, const char *value, void *unused)
1046 {
1047 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1048 if (git_config_bool(var, value))
1049 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1050 else
1051 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1052 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1053 if (git_config_bool(var, value))
1054 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1055 else
1056 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1057 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1058 if (git_config_bool(var, value))
1059 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1060 else
1061 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1062 } else if (!strcmp("uploadpack.keepalive", var)) {
1063 keepalive = git_config_int(var, value);
1064 if (!keepalive)
1065 keepalive = -1;
1066 } else if (!strcmp("uploadpack.allowfilter", var)) {
1067 allow_filter = git_config_bool(var, value);
1068 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1069 allow_ref_in_want = git_config_bool(var, value);
1070 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1071 allow_sideband_all = git_config_bool(var, value);
1072 } else if (!strcmp("core.precomposeunicode", var)) {
1073 precomposed_unicode = git_config_bool(var, value);
1074 }
1075
1076 if (current_config_scope() != CONFIG_SCOPE_REPO) {
1077 if (!strcmp("uploadpack.packobjectshook", var))
1078 return git_config_string(&pack_objects_hook, var, value);
1079 }
1080
1081 return parse_hide_refs_config(var, value, "uploadpack");
1082 }
1083
1084 void upload_pack(struct upload_pack_options *options)
1085 {
1086 struct string_list symref = STRING_LIST_INIT_DUP;
1087 struct object_array want_obj = OBJECT_ARRAY_INIT;
1088 struct packet_reader reader;
1089
1090 stateless_rpc = options->stateless_rpc;
1091 timeout = options->timeout;
1092 daemon_mode = options->daemon_mode;
1093
1094 git_config(upload_pack_config, NULL);
1095
1096 head_ref_namespaced(find_symref, &symref);
1097
1098 if (options->advertise_refs || !stateless_rpc) {
1099 reset_timeout();
1100 head_ref_namespaced(send_ref, &symref);
1101 for_each_namespaced_ref(send_ref, &symref);
1102 advertise_shallow_grafts(1);
1103 packet_flush(1);
1104 } else {
1105 head_ref_namespaced(check_ref, NULL);
1106 for_each_namespaced_ref(check_ref, NULL);
1107 }
1108 string_list_clear(&symref, 1);
1109 if (options->advertise_refs)
1110 return;
1111
1112 packet_reader_init(&reader, 0, NULL, 0,
1113 PACKET_READ_CHOMP_NEWLINE |
1114 PACKET_READ_DIE_ON_ERR_PACKET);
1115
1116 receive_needs(&reader, &want_obj);
1117 if (want_obj.nr) {
1118 struct object_array have_obj = OBJECT_ARRAY_INIT;
1119 get_common_commits(&reader, &have_obj, &want_obj);
1120 create_pack_file(&have_obj, &want_obj);
1121 }
1122 }
1123
1124 struct upload_pack_data {
1125 struct object_array wants;
1126 struct string_list wanted_refs;
1127 struct oid_array haves;
1128
1129 struct object_array shallows;
1130 struct string_list deepen_not;
1131 int depth;
1132 timestamp_t deepen_since;
1133 int deepen_rev_list;
1134 int deepen_relative;
1135
1136 struct packet_writer writer;
1137
1138 unsigned stateless_rpc : 1;
1139
1140 unsigned use_thin_pack : 1;
1141 unsigned use_ofs_delta : 1;
1142 unsigned no_progress : 1;
1143 unsigned use_include_tag : 1;
1144 unsigned done : 1;
1145 };
1146
1147 static void upload_pack_data_init(struct upload_pack_data *data)
1148 {
1149 struct object_array wants = OBJECT_ARRAY_INIT;
1150 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
1151 struct oid_array haves = OID_ARRAY_INIT;
1152 struct object_array shallows = OBJECT_ARRAY_INIT;
1153 struct string_list deepen_not = STRING_LIST_INIT_DUP;
1154
1155 memset(data, 0, sizeof(*data));
1156 data->wants = wants;
1157 data->wanted_refs = wanted_refs;
1158 data->haves = haves;
1159 data->shallows = shallows;
1160 data->deepen_not = deepen_not;
1161 packet_writer_init(&data->writer, 1);
1162 }
1163
1164 static void upload_pack_data_clear(struct upload_pack_data *data)
1165 {
1166 object_array_clear(&data->wants);
1167 string_list_clear(&data->wanted_refs, 1);
1168 oid_array_clear(&data->haves);
1169 object_array_clear(&data->shallows);
1170 string_list_clear(&data->deepen_not, 0);
1171 }
1172
1173 static int parse_want(struct packet_writer *writer, const char *line,
1174 struct object_array *want_obj)
1175 {
1176 const char *arg;
1177 if (skip_prefix(line, "want ", &arg)) {
1178 struct object_id oid;
1179 struct object *o;
1180
1181 if (get_oid_hex(arg, &oid))
1182 die("git upload-pack: protocol error, "
1183 "expected to get oid, not '%s'", line);
1184
1185 o = parse_object(the_repository, &oid);
1186 if (!o) {
1187 packet_writer_error(writer,
1188 "upload-pack: not our ref %s",
1189 oid_to_hex(&oid));
1190 die("git upload-pack: not our ref %s",
1191 oid_to_hex(&oid));
1192 }
1193
1194 if (!(o->flags & WANTED)) {
1195 o->flags |= WANTED;
1196 add_object_array(o, NULL, want_obj);
1197 }
1198
1199 return 1;
1200 }
1201
1202 return 0;
1203 }
1204
1205 static int parse_want_ref(struct packet_writer *writer, const char *line,
1206 struct string_list *wanted_refs,
1207 struct object_array *want_obj)
1208 {
1209 const char *arg;
1210 if (skip_prefix(line, "want-ref ", &arg)) {
1211 struct object_id oid;
1212 struct string_list_item *item;
1213 struct object *o;
1214
1215 if (read_ref(arg, &oid)) {
1216 packet_writer_error(writer, "unknown ref %s", arg);
1217 die("unknown ref %s", arg);
1218 }
1219
1220 item = string_list_append(wanted_refs, arg);
1221 item->util = oiddup(&oid);
1222
1223 o = parse_object_or_die(&oid, arg);
1224 if (!(o->flags & WANTED)) {
1225 o->flags |= WANTED;
1226 add_object_array(o, NULL, want_obj);
1227 }
1228
1229 return 1;
1230 }
1231
1232 return 0;
1233 }
1234
1235 static int parse_have(const char *line, struct oid_array *haves)
1236 {
1237 const char *arg;
1238 if (skip_prefix(line, "have ", &arg)) {
1239 struct object_id oid;
1240
1241 if (get_oid_hex(arg, &oid))
1242 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1243 oid_array_append(haves, &oid);
1244 return 1;
1245 }
1246
1247 return 0;
1248 }
1249
1250 static void process_args(struct packet_reader *request,
1251 struct upload_pack_data *data,
1252 struct object_array *want_obj)
1253 {
1254 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1255 const char *arg = request->line;
1256 const char *p;
1257
1258 /* process want */
1259 if (parse_want(&data->writer, arg, want_obj))
1260 continue;
1261 if (allow_ref_in_want &&
1262 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1263 want_obj))
1264 continue;
1265 /* process have line */
1266 if (parse_have(arg, &data->haves))
1267 continue;
1268
1269 /* process args like thin-pack */
1270 if (!strcmp(arg, "thin-pack")) {
1271 use_thin_pack = 1;
1272 continue;
1273 }
1274 if (!strcmp(arg, "ofs-delta")) {
1275 use_ofs_delta = 1;
1276 continue;
1277 }
1278 if (!strcmp(arg, "no-progress")) {
1279 no_progress = 1;
1280 continue;
1281 }
1282 if (!strcmp(arg, "include-tag")) {
1283 use_include_tag = 1;
1284 continue;
1285 }
1286 if (!strcmp(arg, "done")) {
1287 data->done = 1;
1288 continue;
1289 }
1290
1291 /* Shallow related arguments */
1292 if (process_shallow(arg, &data->shallows))
1293 continue;
1294 if (process_deepen(arg, &data->depth))
1295 continue;
1296 if (process_deepen_since(arg, &data->deepen_since,
1297 &data->deepen_rev_list))
1298 continue;
1299 if (process_deepen_not(arg, &data->deepen_not,
1300 &data->deepen_rev_list))
1301 continue;
1302 if (!strcmp(arg, "deepen-relative")) {
1303 data->deepen_relative = 1;
1304 continue;
1305 }
1306
1307 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1308 list_objects_filter_die_if_populated(&filter_options);
1309 parse_list_objects_filter(&filter_options, p);
1310 continue;
1311 }
1312
1313 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1314 allow_sideband_all) &&
1315 !strcmp(arg, "sideband-all")) {
1316 data->writer.use_sideband = 1;
1317 continue;
1318 }
1319
1320 /* ignore unknown lines maybe? */
1321 die("unexpected line: '%s'", arg);
1322 }
1323 }
1324
1325 static int process_haves(struct oid_array *haves, struct oid_array *common,
1326 struct object_array *have_obj)
1327 {
1328 int i;
1329
1330 /* Process haves */
1331 for (i = 0; i < haves->nr; i++) {
1332 const struct object_id *oid = &haves->oid[i];
1333 struct object *o;
1334 int we_knew_they_have = 0;
1335
1336 if (!has_object_file(oid))
1337 continue;
1338
1339 oid_array_append(common, oid);
1340
1341 o = parse_object(the_repository, oid);
1342 if (!o)
1343 die("oops (%s)", oid_to_hex(oid));
1344 if (o->type == OBJ_COMMIT) {
1345 struct commit_list *parents;
1346 struct commit *commit = (struct commit *)o;
1347 if (o->flags & THEY_HAVE)
1348 we_knew_they_have = 1;
1349 else
1350 o->flags |= THEY_HAVE;
1351 if (!oldest_have || (commit->date < oldest_have))
1352 oldest_have = commit->date;
1353 for (parents = commit->parents;
1354 parents;
1355 parents = parents->next)
1356 parents->item->object.flags |= THEY_HAVE;
1357 }
1358 if (!we_knew_they_have)
1359 add_object_array(o, NULL, have_obj);
1360 }
1361
1362 return 0;
1363 }
1364
1365 static int send_acks(struct packet_writer *writer, struct oid_array *acks,
1366 const struct object_array *have_obj,
1367 struct object_array *want_obj)
1368 {
1369 int i;
1370
1371 packet_writer_write(writer, "acknowledgments\n");
1372
1373 /* Send Acks */
1374 if (!acks->nr)
1375 packet_writer_write(writer, "NAK\n");
1376
1377 for (i = 0; i < acks->nr; i++) {
1378 packet_writer_write(writer, "ACK %s\n",
1379 oid_to_hex(&acks->oid[i]));
1380 }
1381
1382 if (ok_to_give_up(have_obj, want_obj)) {
1383 /* Send Ready */
1384 packet_writer_write(writer, "ready\n");
1385 return 1;
1386 }
1387
1388 return 0;
1389 }
1390
1391 static int process_haves_and_send_acks(struct upload_pack_data *data,
1392 struct object_array *have_obj,
1393 struct object_array *want_obj)
1394 {
1395 struct oid_array common = OID_ARRAY_INIT;
1396 int ret = 0;
1397
1398 process_haves(&data->haves, &common, have_obj);
1399 if (data->done) {
1400 ret = 1;
1401 } else if (send_acks(&data->writer, &common, have_obj, want_obj)) {
1402 packet_writer_delim(&data->writer);
1403 ret = 1;
1404 } else {
1405 /* Add Flush */
1406 packet_writer_flush(&data->writer);
1407 ret = 0;
1408 }
1409
1410 oid_array_clear(&data->haves);
1411 oid_array_clear(&common);
1412 return ret;
1413 }
1414
1415 static void send_wanted_ref_info(struct upload_pack_data *data)
1416 {
1417 const struct string_list_item *item;
1418
1419 if (!data->wanted_refs.nr)
1420 return;
1421
1422 packet_writer_write(&data->writer, "wanted-refs\n");
1423
1424 for_each_string_list_item(item, &data->wanted_refs) {
1425 packet_writer_write(&data->writer, "%s %s\n",
1426 oid_to_hex(item->util),
1427 item->string);
1428 }
1429
1430 packet_writer_delim(&data->writer);
1431 }
1432
1433 static void send_shallow_info(struct upload_pack_data *data,
1434 struct object_array *want_obj)
1435 {
1436 /* No shallow info needs to be sent */
1437 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1438 !is_repository_shallow(the_repository))
1439 return;
1440
1441 packet_writer_write(&data->writer, "shallow-info\n");
1442
1443 if (!send_shallow_list(&data->writer, data->depth,
1444 data->deepen_rev_list,
1445 data->deepen_since, &data->deepen_not,
1446 data->deepen_relative,
1447 &data->shallows, want_obj) &&
1448 is_repository_shallow(the_repository))
1449 deepen(&data->writer, INFINITE_DEPTH, data->deepen_relative,
1450 &data->shallows, want_obj);
1451
1452 packet_delim(1);
1453 }
1454
1455 enum fetch_state {
1456 FETCH_PROCESS_ARGS = 0,
1457 FETCH_SEND_ACKS,
1458 FETCH_SEND_PACK,
1459 FETCH_DONE,
1460 };
1461
1462 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1463 struct packet_reader *request)
1464 {
1465 enum fetch_state state = FETCH_PROCESS_ARGS;
1466 struct upload_pack_data data;
1467 struct object_array have_obj = OBJECT_ARRAY_INIT;
1468 struct object_array want_obj = OBJECT_ARRAY_INIT;
1469
1470 clear_object_flags(ALL_FLAGS);
1471
1472 git_config(upload_pack_config, NULL);
1473
1474 upload_pack_data_init(&data);
1475 use_sideband = LARGE_PACKET_MAX;
1476
1477 while (state != FETCH_DONE) {
1478 switch (state) {
1479 case FETCH_PROCESS_ARGS:
1480 process_args(request, &data, &want_obj);
1481
1482 if (!want_obj.nr) {
1483 /*
1484 * Request didn't contain any 'want' lines,
1485 * guess they didn't want anything.
1486 */
1487 state = FETCH_DONE;
1488 } else if (data.haves.nr) {
1489 /*
1490 * Request had 'have' lines, so lets ACK them.
1491 */
1492 state = FETCH_SEND_ACKS;
1493 } else {
1494 /*
1495 * Request had 'want's but no 'have's so we can
1496 * immedietly go to construct and send a pack.
1497 */
1498 state = FETCH_SEND_PACK;
1499 }
1500 break;
1501 case FETCH_SEND_ACKS:
1502 if (process_haves_and_send_acks(&data, &have_obj,
1503 &want_obj))
1504 state = FETCH_SEND_PACK;
1505 else
1506 state = FETCH_DONE;
1507 break;
1508 case FETCH_SEND_PACK:
1509 send_wanted_ref_info(&data);
1510 send_shallow_info(&data, &want_obj);
1511
1512 packet_writer_write(&data.writer, "packfile\n");
1513 create_pack_file(&have_obj, &want_obj);
1514 state = FETCH_DONE;
1515 break;
1516 case FETCH_DONE:
1517 continue;
1518 }
1519 }
1520
1521 upload_pack_data_clear(&data);
1522 object_array_clear(&have_obj);
1523 object_array_clear(&want_obj);
1524 return 0;
1525 }
1526
1527 int upload_pack_advertise(struct repository *r,
1528 struct strbuf *value)
1529 {
1530 if (value) {
1531 int allow_filter_value;
1532 int allow_ref_in_want;
1533 int allow_sideband_all_value;
1534
1535 strbuf_addstr(value, "shallow");
1536
1537 if (!repo_config_get_bool(the_repository,
1538 "uploadpack.allowfilter",
1539 &allow_filter_value) &&
1540 allow_filter_value)
1541 strbuf_addstr(value, " filter");
1542
1543 if (!repo_config_get_bool(the_repository,
1544 "uploadpack.allowrefinwant",
1545 &allow_ref_in_want) &&
1546 allow_ref_in_want)
1547 strbuf_addstr(value, " ref-in-want");
1548
1549 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1550 (!repo_config_get_bool(the_repository,
1551 "uploadpack.allowsidebandall",
1552 &allow_sideband_all_value) &&
1553 allow_sideband_all_value))
1554 strbuf_addstr(value, " sideband-all");
1555 }
1556
1557 return 1;
1558 }