commit-graph: use raw_object_store when closing
[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.filter_spec) {
144 struct strbuf expanded_filter_spec = STRBUF_INIT;
145 expand_list_objects_filter_spec(&filter_options,
146 &expanded_filter_spec);
147 if (pack_objects.use_shell) {
148 struct strbuf buf = STRBUF_INIT;
149 sq_quote_buf(&buf, expanded_filter_spec.buf);
150 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
151 strbuf_release(&buf);
152 } else {
153 argv_array_pushf(&pack_objects.args, "--filter=%s",
154 expanded_filter_spec.buf);
155 }
156 }
157
158 pack_objects.in = -1;
159 pack_objects.out = -1;
160 pack_objects.err = -1;
161
162 if (start_command(&pack_objects))
163 die("git upload-pack: unable to fork git-pack-objects");
164
165 pipe_fd = xfdopen(pack_objects.in, "w");
166
167 if (shallow_nr)
168 for_each_commit_graft(write_one_shallow, pipe_fd);
169
170 for (i = 0; i < want_obj->nr; i++)
171 fprintf(pipe_fd, "%s\n",
172 oid_to_hex(&want_obj->objects[i].item->oid));
173 fprintf(pipe_fd, "--not\n");
174 for (i = 0; i < have_obj->nr; i++)
175 fprintf(pipe_fd, "%s\n",
176 oid_to_hex(&have_obj->objects[i].item->oid));
177 for (i = 0; i < extra_edge_obj.nr; i++)
178 fprintf(pipe_fd, "%s\n",
179 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
180 fprintf(pipe_fd, "\n");
181 fflush(pipe_fd);
182 fclose(pipe_fd);
183
184 /* We read from pack_objects.err to capture stderr output for
185 * progress bar, and pack_objects.out to capture the pack data.
186 */
187
188 while (1) {
189 struct pollfd pfd[2];
190 int pe, pu, pollsize;
191 int ret;
192
193 reset_timeout();
194
195 pollsize = 0;
196 pe = pu = -1;
197
198 if (0 <= pack_objects.out) {
199 pfd[pollsize].fd = pack_objects.out;
200 pfd[pollsize].events = POLLIN;
201 pu = pollsize;
202 pollsize++;
203 }
204 if (0 <= pack_objects.err) {
205 pfd[pollsize].fd = pack_objects.err;
206 pfd[pollsize].events = POLLIN;
207 pe = pollsize;
208 pollsize++;
209 }
210
211 if (!pollsize)
212 break;
213
214 ret = poll(pfd, pollsize,
215 keepalive < 0 ? -1 : 1000 * keepalive);
216
217 if (ret < 0) {
218 if (errno != EINTR) {
219 error_errno("poll failed, resuming");
220 sleep(1);
221 }
222 continue;
223 }
224 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
225 /* Status ready; we ship that in the side-band
226 * or dump to the standard error.
227 */
228 sz = xread(pack_objects.err, progress,
229 sizeof(progress));
230 if (0 < sz)
231 send_client_data(2, progress, sz);
232 else if (sz == 0) {
233 close(pack_objects.err);
234 pack_objects.err = -1;
235 }
236 else
237 goto fail;
238 /* give priority to status messages */
239 continue;
240 }
241 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
242 /* Data ready; we keep the last byte to ourselves
243 * in case we detect broken rev-list, so that we
244 * can leave the stream corrupted. This is
245 * unfortunate -- unpack-objects would happily
246 * accept a valid packdata with trailing garbage,
247 * so appending garbage after we pass all the
248 * pack data is not good enough to signal
249 * breakage to downstream.
250 */
251 char *cp = data;
252 ssize_t outsz = 0;
253 if (0 <= buffered) {
254 *cp++ = buffered;
255 outsz++;
256 }
257 sz = xread(pack_objects.out, cp,
258 sizeof(data) - outsz);
259 if (0 < sz)
260 ;
261 else if (sz == 0) {
262 close(pack_objects.out);
263 pack_objects.out = -1;
264 }
265 else
266 goto fail;
267 sz += outsz;
268 if (1 < sz) {
269 buffered = data[sz-1] & 0xFF;
270 sz--;
271 }
272 else
273 buffered = -1;
274 send_client_data(1, data, sz);
275 }
276
277 /*
278 * We hit the keepalive timeout without saying anything; send
279 * an empty message on the data sideband just to let the other
280 * side know we're still working on it, but don't have any data
281 * yet.
282 *
283 * If we don't have a sideband channel, there's no room in the
284 * protocol to say anything, so those clients are just out of
285 * luck.
286 */
287 if (!ret && use_sideband) {
288 static const char buf[] = "0005\1";
289 write_or_die(1, buf, 5);
290 }
291 }
292
293 if (finish_command(&pack_objects)) {
294 error("git upload-pack: git-pack-objects died with error.");
295 goto fail;
296 }
297
298 /* flush the data */
299 if (0 <= buffered) {
300 data[0] = buffered;
301 send_client_data(1, data, 1);
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_oid(const char *hex, struct object_id *oid,
314 struct object_array *have_obj)
315 {
316 struct object *o;
317 int we_knew_they_have = 0;
318
319 if (get_oid_hex(hex, oid))
320 die("git upload-pack: expected SHA1 object, got '%s'", hex);
321 if (!has_object_file(oid))
322 return -1;
323
324 o = parse_object(the_repository, oid);
325 if (!o)
326 die("oops (%s)", oid_to_hex(oid));
327 if (o->type == OBJ_COMMIT) {
328 struct commit_list *parents;
329 struct commit *commit = (struct commit *)o;
330 if (o->flags & THEY_HAVE)
331 we_knew_they_have = 1;
332 else
333 o->flags |= THEY_HAVE;
334 if (!oldest_have || (commit->date < oldest_have))
335 oldest_have = commit->date;
336 for (parents = commit->parents;
337 parents;
338 parents = parents->next)
339 parents->item->object.flags |= THEY_HAVE;
340 }
341 if (!we_knew_they_have) {
342 add_object_array(o, NULL, have_obj);
343 return 1;
344 }
345 return 0;
346 }
347
348 static int ok_to_give_up(const struct object_array *have_obj,
349 struct object_array *want_obj)
350 {
351 uint32_t min_generation = GENERATION_NUMBER_ZERO;
352
353 if (!have_obj->nr)
354 return 0;
355
356 return can_all_from_reach_with_flag(want_obj, THEY_HAVE,
357 COMMON_KNOWN, oldest_have,
358 min_generation);
359 }
360
361 static int get_common_commits(struct packet_reader *reader,
362 struct object_array *have_obj,
363 struct object_array *want_obj)
364 {
365 struct object_id oid;
366 char last_hex[GIT_MAX_HEXSZ + 1];
367 int got_common = 0;
368 int got_other = 0;
369 int sent_ready = 0;
370
371 save_commit_buffer = 0;
372
373 for (;;) {
374 const char *arg;
375
376 reset_timeout();
377
378 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
379 if (multi_ack == 2 && got_common
380 && !got_other && ok_to_give_up(have_obj, want_obj)) {
381 sent_ready = 1;
382 packet_write_fmt(1, "ACK %s ready\n", last_hex);
383 }
384 if (have_obj->nr == 0 || multi_ack)
385 packet_write_fmt(1, "NAK\n");
386
387 if (no_done && sent_ready) {
388 packet_write_fmt(1, "ACK %s\n", last_hex);
389 return 0;
390 }
391 if (stateless_rpc)
392 exit(0);
393 got_common = 0;
394 got_other = 0;
395 continue;
396 }
397 if (skip_prefix(reader->line, "have ", &arg)) {
398 switch (got_oid(arg, &oid, have_obj)) {
399 case -1: /* they have what we do not */
400 got_other = 1;
401 if (multi_ack && ok_to_give_up(have_obj, want_obj)) {
402 const char *hex = oid_to_hex(&oid);
403 if (multi_ack == 2) {
404 sent_ready = 1;
405 packet_write_fmt(1, "ACK %s ready\n", hex);
406 } else
407 packet_write_fmt(1, "ACK %s continue\n", hex);
408 }
409 break;
410 default:
411 got_common = 1;
412 oid_to_hex_r(last_hex, &oid);
413 if (multi_ack == 2)
414 packet_write_fmt(1, "ACK %s common\n", last_hex);
415 else if (multi_ack)
416 packet_write_fmt(1, "ACK %s continue\n", last_hex);
417 else if (have_obj->nr == 1)
418 packet_write_fmt(1, "ACK %s\n", last_hex);
419 break;
420 }
421 continue;
422 }
423 if (!strcmp(reader->line, "done")) {
424 if (have_obj->nr > 0) {
425 if (multi_ack)
426 packet_write_fmt(1, "ACK %s\n", last_hex);
427 return 0;
428 }
429 packet_write_fmt(1, "NAK\n");
430 return -1;
431 }
432 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
433 }
434 }
435
436 static int is_our_ref(struct object *o)
437 {
438 int allow_hidden_ref = (allow_unadvertised_object_request &
439 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
440 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
441 }
442
443 /*
444 * on successful case, it's up to the caller to close cmd->out
445 */
446 static int do_reachable_revlist(struct child_process *cmd,
447 struct object_array *src,
448 struct object_array *reachable)
449 {
450 static const char *argv[] = {
451 "rev-list", "--stdin", NULL,
452 };
453 struct object *o;
454 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
455 int i;
456 const unsigned hexsz = the_hash_algo->hexsz;
457
458 cmd->argv = argv;
459 cmd->git_cmd = 1;
460 cmd->no_stderr = 1;
461 cmd->in = -1;
462 cmd->out = -1;
463
464 /*
465 * If the next rev-list --stdin encounters an unknown commit,
466 * it terminates, which will cause SIGPIPE in the write loop
467 * below.
468 */
469 sigchain_push(SIGPIPE, SIG_IGN);
470
471 if (start_command(cmd))
472 goto error;
473
474 namebuf[0] = '^';
475 namebuf[hexsz + 1] = '\n';
476 for (i = get_max_object_index(); 0 < i; ) {
477 o = get_indexed_object(--i);
478 if (!o)
479 continue;
480 if (reachable && o->type == OBJ_COMMIT)
481 o->flags &= ~TMP_MARK;
482 if (!is_our_ref(o))
483 continue;
484 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
485 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
486 goto error;
487 }
488 namebuf[hexsz] = '\n';
489 for (i = 0; i < src->nr; i++) {
490 o = src->objects[i].item;
491 if (is_our_ref(o)) {
492 if (reachable)
493 add_object_array(o, NULL, reachable);
494 continue;
495 }
496 if (reachable && o->type == OBJ_COMMIT)
497 o->flags |= TMP_MARK;
498 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
499 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
500 goto error;
501 }
502 close(cmd->in);
503 cmd->in = -1;
504 sigchain_pop(SIGPIPE);
505
506 return 0;
507
508 error:
509 sigchain_pop(SIGPIPE);
510
511 if (cmd->in >= 0)
512 close(cmd->in);
513 if (cmd->out >= 0)
514 close(cmd->out);
515 return -1;
516 }
517
518 static int get_reachable_list(struct object_array *src,
519 struct object_array *reachable)
520 {
521 struct child_process cmd = CHILD_PROCESS_INIT;
522 int i;
523 struct object *o;
524 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
525 const unsigned hexsz = the_hash_algo->hexsz;
526
527 if (do_reachable_revlist(&cmd, src, reachable) < 0)
528 return -1;
529
530 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
531 struct object_id sha1;
532 const char *p;
533
534 if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
535 break;
536
537 o = lookup_object(the_repository, sha1.hash);
538 if (o && o->type == OBJ_COMMIT) {
539 o->flags &= ~TMP_MARK;
540 }
541 }
542 for (i = get_max_object_index(); 0 < i; i--) {
543 o = get_indexed_object(i - 1);
544 if (o && o->type == OBJ_COMMIT &&
545 (o->flags & TMP_MARK)) {
546 add_object_array(o, NULL, reachable);
547 o->flags &= ~TMP_MARK;
548 }
549 }
550 close(cmd.out);
551
552 if (finish_command(&cmd))
553 return -1;
554
555 return 0;
556 }
557
558 static int has_unreachable(struct object_array *src)
559 {
560 struct child_process cmd = CHILD_PROCESS_INIT;
561 char buf[1];
562 int i;
563
564 if (do_reachable_revlist(&cmd, src, NULL) < 0)
565 return 1;
566
567 /*
568 * The commits out of the rev-list are not ancestors of
569 * our ref.
570 */
571 i = read_in_full(cmd.out, buf, 1);
572 if (i)
573 goto error;
574 close(cmd.out);
575 cmd.out = -1;
576
577 /*
578 * rev-list may have died by encountering a bad commit
579 * in the history, in which case we do want to bail out
580 * even when it showed no commit.
581 */
582 if (finish_command(&cmd))
583 goto error;
584
585 /* All the non-tip ones are ancestors of what we advertised */
586 return 0;
587
588 error:
589 sigchain_pop(SIGPIPE);
590 if (cmd.out >= 0)
591 close(cmd.out);
592 return 1;
593 }
594
595 static void check_non_tip(struct object_array *want_obj)
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 die("git upload-pack: not our ref %s",
616 oid_to_hex(&o->oid));
617 }
618 }
619
620 static void send_shallow(struct packet_writer *writer,
621 struct commit_list *result)
622 {
623 while (result) {
624 struct object *object = &result->item->object;
625 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
626 packet_writer_write(writer, "shallow %s",
627 oid_to_hex(&object->oid));
628 register_shallow(the_repository, &object->oid);
629 shallow_nr++;
630 }
631 result = result->next;
632 }
633 }
634
635 static void send_unshallow(struct packet_writer *writer,
636 const struct object_array *shallows,
637 struct object_array *want_obj)
638 {
639 int i;
640
641 for (i = 0; i < shallows->nr; i++) {
642 struct object *object = shallows->objects[i].item;
643 if (object->flags & NOT_SHALLOW) {
644 struct commit_list *parents;
645 packet_writer_write(writer, "unshallow %s",
646 oid_to_hex(&object->oid));
647 object->flags &= ~CLIENT_SHALLOW;
648 /*
649 * We want to _register_ "object" as shallow, but we
650 * also need to traverse object's parents to deepen a
651 * shallow clone. Unregister it for now so we can
652 * parse and add the parents to the want list, then
653 * re-register it.
654 */
655 unregister_shallow(&object->oid);
656 object->parsed = 0;
657 parse_commit_or_die((struct commit *)object);
658 parents = ((struct commit *)object)->parents;
659 while (parents) {
660 add_object_array(&parents->item->object,
661 NULL, want_obj);
662 parents = parents->next;
663 }
664 add_object_array(object, NULL, &extra_edge_obj);
665 }
666 /* make sure commit traversal conforms to client */
667 register_shallow(the_repository, &object->oid);
668 }
669 }
670
671 static int check_ref(const char *refname_full, const struct object_id *oid,
672 int flag, void *cb_data);
673 static void deepen(struct packet_writer *writer, int depth, int deepen_relative,
674 struct object_array *shallows, struct object_array *want_obj)
675 {
676 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
677 int i;
678
679 for (i = 0; i < shallows->nr; i++) {
680 struct object *object = shallows->objects[i].item;
681 object->flags |= NOT_SHALLOW;
682 }
683 } else if (deepen_relative) {
684 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
685 struct commit_list *result;
686
687 /*
688 * Checking for reachable shallows requires that our refs be
689 * marked with OUR_REF.
690 */
691 head_ref_namespaced(check_ref, NULL);
692 for_each_namespaced_ref(check_ref, NULL);
693
694 get_reachable_list(shallows, &reachable_shallows);
695 result = get_shallow_commits(&reachable_shallows,
696 depth + 1,
697 SHALLOW, NOT_SHALLOW);
698 send_shallow(writer, result);
699 free_commit_list(result);
700 object_array_clear(&reachable_shallows);
701 } else {
702 struct commit_list *result;
703
704 result = get_shallow_commits(want_obj, depth,
705 SHALLOW, NOT_SHALLOW);
706 send_shallow(writer, result);
707 free_commit_list(result);
708 }
709
710 send_unshallow(writer, shallows, want_obj);
711 }
712
713 static void deepen_by_rev_list(struct packet_writer *writer, int ac,
714 const char **av,
715 struct object_array *shallows,
716 struct object_array *want_obj)
717 {
718 struct commit_list *result;
719
720 close_commit_graph(the_repository->objects);
721 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
722 send_shallow(writer, result);
723 free_commit_list(result);
724 send_unshallow(writer, shallows, want_obj);
725 }
726
727 /* Returns 1 if a shallow list is sent or 0 otherwise */
728 static int send_shallow_list(struct packet_writer *writer,
729 int depth, int deepen_rev_list,
730 timestamp_t deepen_since,
731 struct string_list *deepen_not,
732 int deepen_relative,
733 struct object_array *shallows,
734 struct object_array *want_obj)
735 {
736 int ret = 0;
737
738 if (depth > 0 && deepen_rev_list)
739 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
740 if (depth > 0) {
741 deepen(writer, depth, deepen_relative, shallows, want_obj);
742 ret = 1;
743 } else if (deepen_rev_list) {
744 struct argv_array av = ARGV_ARRAY_INIT;
745 int i;
746
747 argv_array_push(&av, "rev-list");
748 if (deepen_since)
749 argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
750 if (deepen_not->nr) {
751 argv_array_push(&av, "--not");
752 for (i = 0; i < deepen_not->nr; i++) {
753 struct string_list_item *s = deepen_not->items + i;
754 argv_array_push(&av, s->string);
755 }
756 argv_array_push(&av, "--not");
757 }
758 for (i = 0; i < want_obj->nr; i++) {
759 struct object *o = want_obj->objects[i].item;
760 argv_array_push(&av, oid_to_hex(&o->oid));
761 }
762 deepen_by_rev_list(writer, av.argc, av.argv, shallows, want_obj);
763 argv_array_clear(&av);
764 ret = 1;
765 } else {
766 if (shallows->nr > 0) {
767 int i;
768 for (i = 0; i < shallows->nr; i++)
769 register_shallow(the_repository,
770 &shallows->objects[i].item->oid);
771 }
772 }
773
774 shallow_nr += shallows->nr;
775 return ret;
776 }
777
778 static int process_shallow(const char *line, struct object_array *shallows)
779 {
780 const char *arg;
781 if (skip_prefix(line, "shallow ", &arg)) {
782 struct object_id oid;
783 struct object *object;
784 if (get_oid_hex(arg, &oid))
785 die("invalid shallow line: %s", line);
786 object = parse_object(the_repository, &oid);
787 if (!object)
788 return 1;
789 if (object->type != OBJ_COMMIT)
790 die("invalid shallow object %s", oid_to_hex(&oid));
791 if (!(object->flags & CLIENT_SHALLOW)) {
792 object->flags |= CLIENT_SHALLOW;
793 add_object_array(object, NULL, shallows);
794 }
795 return 1;
796 }
797
798 return 0;
799 }
800
801 static int process_deepen(const char *line, int *depth)
802 {
803 const char *arg;
804 if (skip_prefix(line, "deepen ", &arg)) {
805 char *end = NULL;
806 *depth = (int)strtol(arg, &end, 0);
807 if (!end || *end || *depth <= 0)
808 die("Invalid deepen: %s", line);
809 return 1;
810 }
811
812 return 0;
813 }
814
815 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
816 {
817 const char *arg;
818 if (skip_prefix(line, "deepen-since ", &arg)) {
819 char *end = NULL;
820 *deepen_since = parse_timestamp(arg, &end, 0);
821 if (!end || *end || !deepen_since ||
822 /* revisions.c's max_age -1 is special */
823 *deepen_since == -1)
824 die("Invalid deepen-since: %s", line);
825 *deepen_rev_list = 1;
826 return 1;
827 }
828 return 0;
829 }
830
831 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
832 {
833 const char *arg;
834 if (skip_prefix(line, "deepen-not ", &arg)) {
835 char *ref = NULL;
836 struct object_id oid;
837 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
838 die("git upload-pack: ambiguous deepen-not: %s", line);
839 string_list_append(deepen_not, ref);
840 free(ref);
841 *deepen_rev_list = 1;
842 return 1;
843 }
844 return 0;
845 }
846
847 static void receive_needs(struct packet_reader *reader, struct object_array *want_obj)
848 {
849 struct object_array shallows = OBJECT_ARRAY_INIT;
850 struct string_list deepen_not = STRING_LIST_INIT_DUP;
851 int depth = 0;
852 int has_non_tip = 0;
853 timestamp_t deepen_since = 0;
854 int deepen_rev_list = 0;
855 int deepen_relative = 0;
856 struct packet_writer writer;
857
858 shallow_nr = 0;
859 packet_writer_init(&writer, 1);
860 for (;;) {
861 struct object *o;
862 const char *features;
863 struct object_id oid_buf;
864 const char *arg;
865
866 reset_timeout();
867 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
868 break;
869
870 if (process_shallow(reader->line, &shallows))
871 continue;
872 if (process_deepen(reader->line, &depth))
873 continue;
874 if (process_deepen_since(reader->line, &deepen_since, &deepen_rev_list))
875 continue;
876 if (process_deepen_not(reader->line, &deepen_not, &deepen_rev_list))
877 continue;
878
879 if (skip_prefix(reader->line, "filter ", &arg)) {
880 if (!filter_capability_requested)
881 die("git upload-pack: filtering capability not negotiated");
882 parse_list_objects_filter(&filter_options, arg);
883 continue;
884 }
885
886 if (!skip_prefix(reader->line, "want ", &arg) ||
887 parse_oid_hex(arg, &oid_buf, &features))
888 die("git upload-pack: protocol error, "
889 "expected to get object ID, not '%s'", reader->line);
890
891 if (parse_feature_request(features, "deepen-relative"))
892 deepen_relative = 1;
893 if (parse_feature_request(features, "multi_ack_detailed"))
894 multi_ack = 2;
895 else if (parse_feature_request(features, "multi_ack"))
896 multi_ack = 1;
897 if (parse_feature_request(features, "no-done"))
898 no_done = 1;
899 if (parse_feature_request(features, "thin-pack"))
900 use_thin_pack = 1;
901 if (parse_feature_request(features, "ofs-delta"))
902 use_ofs_delta = 1;
903 if (parse_feature_request(features, "side-band-64k"))
904 use_sideband = LARGE_PACKET_MAX;
905 else if (parse_feature_request(features, "side-band"))
906 use_sideband = DEFAULT_PACKET_MAX;
907 if (parse_feature_request(features, "no-progress"))
908 no_progress = 1;
909 if (parse_feature_request(features, "include-tag"))
910 use_include_tag = 1;
911 if (allow_filter && parse_feature_request(features, "filter"))
912 filter_capability_requested = 1;
913
914 o = parse_object(the_repository, &oid_buf);
915 if (!o) {
916 packet_writer_error(&writer,
917 "upload-pack: not our ref %s",
918 oid_to_hex(&oid_buf));
919 die("git upload-pack: not our ref %s",
920 oid_to_hex(&oid_buf));
921 }
922 if (!(o->flags & WANTED)) {
923 o->flags |= WANTED;
924 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
925 || is_our_ref(o)))
926 has_non_tip = 1;
927 add_object_array(o, NULL, want_obj);
928 }
929 }
930
931 /*
932 * We have sent all our refs already, and the other end
933 * should have chosen out of them. When we are operating
934 * in the stateless RPC mode, however, their choice may
935 * have been based on the set of older refs advertised
936 * by another process that handled the initial request.
937 */
938 if (has_non_tip)
939 check_non_tip(want_obj);
940
941 if (!use_sideband && daemon_mode)
942 no_progress = 1;
943
944 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
945 return;
946
947 if (send_shallow_list(&writer, depth, deepen_rev_list, deepen_since,
948 &deepen_not, deepen_relative, &shallows,
949 want_obj))
950 packet_flush(1);
951 object_array_clear(&shallows);
952 }
953
954 /* return non-zero if the ref is hidden, otherwise 0 */
955 static int mark_our_ref(const char *refname, const char *refname_full,
956 const struct object_id *oid)
957 {
958 struct object *o = lookup_unknown_object(oid->hash);
959
960 if (ref_is_hidden(refname, refname_full)) {
961 o->flags |= HIDDEN_REF;
962 return 1;
963 }
964 o->flags |= OUR_REF;
965 return 0;
966 }
967
968 static int check_ref(const char *refname_full, const struct object_id *oid,
969 int flag, void *cb_data)
970 {
971 const char *refname = strip_namespace(refname_full);
972
973 mark_our_ref(refname, refname_full, oid);
974 return 0;
975 }
976
977 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
978 {
979 struct string_list_item *item;
980
981 if (!symref->nr)
982 return;
983 for_each_string_list_item(item, symref)
984 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
985 }
986
987 static int send_ref(const char *refname, const struct object_id *oid,
988 int flag, void *cb_data)
989 {
990 static const char *capabilities = "multi_ack thin-pack side-band"
991 " side-band-64k ofs-delta shallow deepen-since deepen-not"
992 " deepen-relative no-progress include-tag multi_ack_detailed";
993 const char *refname_nons = strip_namespace(refname);
994 struct object_id peeled;
995
996 if (mark_our_ref(refname_nons, refname, oid))
997 return 0;
998
999 if (capabilities) {
1000 struct strbuf symref_info = STRBUF_INIT;
1001
1002 format_symref_info(&symref_info, cb_data);
1003 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
1004 oid_to_hex(oid), refname_nons,
1005 0, capabilities,
1006 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
1007 " allow-tip-sha1-in-want" : "",
1008 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
1009 " allow-reachable-sha1-in-want" : "",
1010 stateless_rpc ? " no-done" : "",
1011 symref_info.buf,
1012 allow_filter ? " filter" : "",
1013 git_user_agent_sanitized());
1014 strbuf_release(&symref_info);
1015 } else {
1016 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1017 }
1018 capabilities = NULL;
1019 if (!peel_ref(refname, &peeled))
1020 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1021 return 0;
1022 }
1023
1024 static int find_symref(const char *refname, const struct object_id *oid,
1025 int flag, void *cb_data)
1026 {
1027 const char *symref_target;
1028 struct string_list_item *item;
1029
1030 if ((flag & REF_ISSYMREF) == 0)
1031 return 0;
1032 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1033 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1034 die("'%s' is a symref but it is not?", refname);
1035 item = string_list_append(cb_data, refname);
1036 item->util = xstrdup(symref_target);
1037 return 0;
1038 }
1039
1040 static int upload_pack_config(const char *var, const char *value, void *unused)
1041 {
1042 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1043 if (git_config_bool(var, value))
1044 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1045 else
1046 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1047 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1048 if (git_config_bool(var, value))
1049 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1050 else
1051 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1052 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1053 if (git_config_bool(var, value))
1054 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1055 else
1056 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1057 } else if (!strcmp("uploadpack.keepalive", var)) {
1058 keepalive = git_config_int(var, value);
1059 if (!keepalive)
1060 keepalive = -1;
1061 } else if (!strcmp("uploadpack.allowfilter", var)) {
1062 allow_filter = git_config_bool(var, value);
1063 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1064 allow_ref_in_want = git_config_bool(var, value);
1065 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1066 allow_sideband_all = git_config_bool(var, value);
1067 }
1068
1069 if (current_config_scope() != CONFIG_SCOPE_REPO) {
1070 if (!strcmp("uploadpack.packobjectshook", var))
1071 return git_config_string(&pack_objects_hook, var, value);
1072 }
1073
1074 return parse_hide_refs_config(var, value, "uploadpack");
1075 }
1076
1077 void upload_pack(struct upload_pack_options *options)
1078 {
1079 struct string_list symref = STRING_LIST_INIT_DUP;
1080 struct object_array want_obj = OBJECT_ARRAY_INIT;
1081 struct packet_reader reader;
1082
1083 stateless_rpc = options->stateless_rpc;
1084 timeout = options->timeout;
1085 daemon_mode = options->daemon_mode;
1086
1087 git_config(upload_pack_config, NULL);
1088
1089 head_ref_namespaced(find_symref, &symref);
1090
1091 if (options->advertise_refs || !stateless_rpc) {
1092 reset_timeout();
1093 head_ref_namespaced(send_ref, &symref);
1094 for_each_namespaced_ref(send_ref, &symref);
1095 advertise_shallow_grafts(1);
1096 packet_flush(1);
1097 } else {
1098 head_ref_namespaced(check_ref, NULL);
1099 for_each_namespaced_ref(check_ref, NULL);
1100 }
1101 string_list_clear(&symref, 1);
1102 if (options->advertise_refs)
1103 return;
1104
1105 packet_reader_init(&reader, 0, NULL, 0,
1106 PACKET_READ_CHOMP_NEWLINE |
1107 PACKET_READ_DIE_ON_ERR_PACKET);
1108
1109 receive_needs(&reader, &want_obj);
1110 if (want_obj.nr) {
1111 struct object_array have_obj = OBJECT_ARRAY_INIT;
1112 get_common_commits(&reader, &have_obj, &want_obj);
1113 create_pack_file(&have_obj, &want_obj);
1114 }
1115 }
1116
1117 struct upload_pack_data {
1118 struct object_array wants;
1119 struct string_list wanted_refs;
1120 struct oid_array haves;
1121
1122 struct object_array shallows;
1123 struct string_list deepen_not;
1124 int depth;
1125 timestamp_t deepen_since;
1126 int deepen_rev_list;
1127 int deepen_relative;
1128
1129 struct packet_writer writer;
1130
1131 unsigned stateless_rpc : 1;
1132
1133 unsigned use_thin_pack : 1;
1134 unsigned use_ofs_delta : 1;
1135 unsigned no_progress : 1;
1136 unsigned use_include_tag : 1;
1137 unsigned done : 1;
1138 };
1139
1140 static void upload_pack_data_init(struct upload_pack_data *data)
1141 {
1142 struct object_array wants = OBJECT_ARRAY_INIT;
1143 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
1144 struct oid_array haves = OID_ARRAY_INIT;
1145 struct object_array shallows = OBJECT_ARRAY_INIT;
1146 struct string_list deepen_not = STRING_LIST_INIT_DUP;
1147
1148 memset(data, 0, sizeof(*data));
1149 data->wants = wants;
1150 data->wanted_refs = wanted_refs;
1151 data->haves = haves;
1152 data->shallows = shallows;
1153 data->deepen_not = deepen_not;
1154 packet_writer_init(&data->writer, 1);
1155 }
1156
1157 static void upload_pack_data_clear(struct upload_pack_data *data)
1158 {
1159 object_array_clear(&data->wants);
1160 string_list_clear(&data->wanted_refs, 1);
1161 oid_array_clear(&data->haves);
1162 object_array_clear(&data->shallows);
1163 string_list_clear(&data->deepen_not, 0);
1164 }
1165
1166 static int parse_want(struct packet_writer *writer, const char *line,
1167 struct object_array *want_obj)
1168 {
1169 const char *arg;
1170 if (skip_prefix(line, "want ", &arg)) {
1171 struct object_id oid;
1172 struct object *o;
1173
1174 if (get_oid_hex(arg, &oid))
1175 die("git upload-pack: protocol error, "
1176 "expected to get oid, not '%s'", line);
1177
1178 o = parse_object(the_repository, &oid);
1179 if (!o) {
1180 packet_writer_error(writer,
1181 "upload-pack: not our ref %s",
1182 oid_to_hex(&oid));
1183 die("git upload-pack: not our ref %s",
1184 oid_to_hex(&oid));
1185 }
1186
1187 if (!(o->flags & WANTED)) {
1188 o->flags |= WANTED;
1189 add_object_array(o, NULL, want_obj);
1190 }
1191
1192 return 1;
1193 }
1194
1195 return 0;
1196 }
1197
1198 static int parse_want_ref(struct packet_writer *writer, const char *line,
1199 struct string_list *wanted_refs,
1200 struct object_array *want_obj)
1201 {
1202 const char *arg;
1203 if (skip_prefix(line, "want-ref ", &arg)) {
1204 struct object_id oid;
1205 struct string_list_item *item;
1206 struct object *o;
1207
1208 if (read_ref(arg, &oid)) {
1209 packet_writer_error(writer, "unknown ref %s", arg);
1210 die("unknown ref %s", arg);
1211 }
1212
1213 item = string_list_append(wanted_refs, arg);
1214 item->util = oiddup(&oid);
1215
1216 o = parse_object_or_die(&oid, arg);
1217 if (!(o->flags & WANTED)) {
1218 o->flags |= WANTED;
1219 add_object_array(o, NULL, want_obj);
1220 }
1221
1222 return 1;
1223 }
1224
1225 return 0;
1226 }
1227
1228 static int parse_have(const char *line, struct oid_array *haves)
1229 {
1230 const char *arg;
1231 if (skip_prefix(line, "have ", &arg)) {
1232 struct object_id oid;
1233
1234 if (get_oid_hex(arg, &oid))
1235 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1236 oid_array_append(haves, &oid);
1237 return 1;
1238 }
1239
1240 return 0;
1241 }
1242
1243 static void process_args(struct packet_reader *request,
1244 struct upload_pack_data *data,
1245 struct object_array *want_obj)
1246 {
1247 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1248 const char *arg = request->line;
1249 const char *p;
1250
1251 /* process want */
1252 if (parse_want(&data->writer, arg, want_obj))
1253 continue;
1254 if (allow_ref_in_want &&
1255 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1256 want_obj))
1257 continue;
1258 /* process have line */
1259 if (parse_have(arg, &data->haves))
1260 continue;
1261
1262 /* process args like thin-pack */
1263 if (!strcmp(arg, "thin-pack")) {
1264 use_thin_pack = 1;
1265 continue;
1266 }
1267 if (!strcmp(arg, "ofs-delta")) {
1268 use_ofs_delta = 1;
1269 continue;
1270 }
1271 if (!strcmp(arg, "no-progress")) {
1272 no_progress = 1;
1273 continue;
1274 }
1275 if (!strcmp(arg, "include-tag")) {
1276 use_include_tag = 1;
1277 continue;
1278 }
1279 if (!strcmp(arg, "done")) {
1280 data->done = 1;
1281 continue;
1282 }
1283
1284 /* Shallow related arguments */
1285 if (process_shallow(arg, &data->shallows))
1286 continue;
1287 if (process_deepen(arg, &data->depth))
1288 continue;
1289 if (process_deepen_since(arg, &data->deepen_since,
1290 &data->deepen_rev_list))
1291 continue;
1292 if (process_deepen_not(arg, &data->deepen_not,
1293 &data->deepen_rev_list))
1294 continue;
1295 if (!strcmp(arg, "deepen-relative")) {
1296 data->deepen_relative = 1;
1297 continue;
1298 }
1299
1300 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1301 parse_list_objects_filter(&filter_options, p);
1302 continue;
1303 }
1304
1305 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1306 allow_sideband_all) &&
1307 !strcmp(arg, "sideband-all")) {
1308 data->writer.use_sideband = 1;
1309 continue;
1310 }
1311
1312 /* ignore unknown lines maybe? */
1313 die("unexpected line: '%s'", arg);
1314 }
1315 }
1316
1317 static int process_haves(struct oid_array *haves, struct oid_array *common,
1318 struct object_array *have_obj)
1319 {
1320 int i;
1321
1322 /* Process haves */
1323 for (i = 0; i < haves->nr; i++) {
1324 const struct object_id *oid = &haves->oid[i];
1325 struct object *o;
1326 int we_knew_they_have = 0;
1327
1328 if (!has_object_file(oid))
1329 continue;
1330
1331 oid_array_append(common, oid);
1332
1333 o = parse_object(the_repository, oid);
1334 if (!o)
1335 die("oops (%s)", oid_to_hex(oid));
1336 if (o->type == OBJ_COMMIT) {
1337 struct commit_list *parents;
1338 struct commit *commit = (struct commit *)o;
1339 if (o->flags & THEY_HAVE)
1340 we_knew_they_have = 1;
1341 else
1342 o->flags |= THEY_HAVE;
1343 if (!oldest_have || (commit->date < oldest_have))
1344 oldest_have = commit->date;
1345 for (parents = commit->parents;
1346 parents;
1347 parents = parents->next)
1348 parents->item->object.flags |= THEY_HAVE;
1349 }
1350 if (!we_knew_they_have)
1351 add_object_array(o, NULL, have_obj);
1352 }
1353
1354 return 0;
1355 }
1356
1357 static int send_acks(struct packet_writer *writer, struct oid_array *acks,
1358 const struct object_array *have_obj,
1359 struct object_array *want_obj)
1360 {
1361 int i;
1362
1363 packet_writer_write(writer, "acknowledgments\n");
1364
1365 /* Send Acks */
1366 if (!acks->nr)
1367 packet_writer_write(writer, "NAK\n");
1368
1369 for (i = 0; i < acks->nr; i++) {
1370 packet_writer_write(writer, "ACK %s\n",
1371 oid_to_hex(&acks->oid[i]));
1372 }
1373
1374 if (ok_to_give_up(have_obj, want_obj)) {
1375 /* Send Ready */
1376 packet_writer_write(writer, "ready\n");
1377 return 1;
1378 }
1379
1380 return 0;
1381 }
1382
1383 static int process_haves_and_send_acks(struct upload_pack_data *data,
1384 struct object_array *have_obj,
1385 struct object_array *want_obj)
1386 {
1387 struct oid_array common = OID_ARRAY_INIT;
1388 int ret = 0;
1389
1390 process_haves(&data->haves, &common, have_obj);
1391 if (data->done) {
1392 ret = 1;
1393 } else if (send_acks(&data->writer, &common, have_obj, want_obj)) {
1394 packet_writer_delim(&data->writer);
1395 ret = 1;
1396 } else {
1397 /* Add Flush */
1398 packet_writer_flush(&data->writer);
1399 ret = 0;
1400 }
1401
1402 oid_array_clear(&data->haves);
1403 oid_array_clear(&common);
1404 return ret;
1405 }
1406
1407 static void send_wanted_ref_info(struct upload_pack_data *data)
1408 {
1409 const struct string_list_item *item;
1410
1411 if (!data->wanted_refs.nr)
1412 return;
1413
1414 packet_writer_write(&data->writer, "wanted-refs\n");
1415
1416 for_each_string_list_item(item, &data->wanted_refs) {
1417 packet_writer_write(&data->writer, "%s %s\n",
1418 oid_to_hex(item->util),
1419 item->string);
1420 }
1421
1422 packet_writer_delim(&data->writer);
1423 }
1424
1425 static void send_shallow_info(struct upload_pack_data *data,
1426 struct object_array *want_obj)
1427 {
1428 /* No shallow info needs to be sent */
1429 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1430 !is_repository_shallow(the_repository))
1431 return;
1432
1433 packet_writer_write(&data->writer, "shallow-info\n");
1434
1435 if (!send_shallow_list(&data->writer, data->depth,
1436 data->deepen_rev_list,
1437 data->deepen_since, &data->deepen_not,
1438 data->deepen_relative,
1439 &data->shallows, want_obj) &&
1440 is_repository_shallow(the_repository))
1441 deepen(&data->writer, INFINITE_DEPTH, data->deepen_relative,
1442 &data->shallows, want_obj);
1443
1444 packet_delim(1);
1445 }
1446
1447 enum fetch_state {
1448 FETCH_PROCESS_ARGS = 0,
1449 FETCH_SEND_ACKS,
1450 FETCH_SEND_PACK,
1451 FETCH_DONE,
1452 };
1453
1454 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1455 struct packet_reader *request)
1456 {
1457 enum fetch_state state = FETCH_PROCESS_ARGS;
1458 struct upload_pack_data data;
1459 struct object_array have_obj = OBJECT_ARRAY_INIT;
1460 struct object_array want_obj = OBJECT_ARRAY_INIT;
1461
1462 clear_object_flags(ALL_FLAGS);
1463
1464 git_config(upload_pack_config, NULL);
1465
1466 upload_pack_data_init(&data);
1467 use_sideband = LARGE_PACKET_MAX;
1468
1469 while (state != FETCH_DONE) {
1470 switch (state) {
1471 case FETCH_PROCESS_ARGS:
1472 process_args(request, &data, &want_obj);
1473
1474 if (!want_obj.nr) {
1475 /*
1476 * Request didn't contain any 'want' lines,
1477 * guess they didn't want anything.
1478 */
1479 state = FETCH_DONE;
1480 } else if (data.haves.nr) {
1481 /*
1482 * Request had 'have' lines, so lets ACK them.
1483 */
1484 state = FETCH_SEND_ACKS;
1485 } else {
1486 /*
1487 * Request had 'want's but no 'have's so we can
1488 * immedietly go to construct and send a pack.
1489 */
1490 state = FETCH_SEND_PACK;
1491 }
1492 break;
1493 case FETCH_SEND_ACKS:
1494 if (process_haves_and_send_acks(&data, &have_obj,
1495 &want_obj))
1496 state = FETCH_SEND_PACK;
1497 else
1498 state = FETCH_DONE;
1499 break;
1500 case FETCH_SEND_PACK:
1501 send_wanted_ref_info(&data);
1502 send_shallow_info(&data, &want_obj);
1503
1504 packet_writer_write(&data.writer, "packfile\n");
1505 create_pack_file(&have_obj, &want_obj);
1506 state = FETCH_DONE;
1507 break;
1508 case FETCH_DONE:
1509 continue;
1510 }
1511 }
1512
1513 upload_pack_data_clear(&data);
1514 object_array_clear(&have_obj);
1515 object_array_clear(&want_obj);
1516 return 0;
1517 }
1518
1519 int upload_pack_advertise(struct repository *r,
1520 struct strbuf *value)
1521 {
1522 if (value) {
1523 int allow_filter_value;
1524 int allow_ref_in_want;
1525 int allow_sideband_all_value;
1526
1527 strbuf_addstr(value, "shallow");
1528
1529 if (!repo_config_get_bool(the_repository,
1530 "uploadpack.allowfilter",
1531 &allow_filter_value) &&
1532 allow_filter_value)
1533 strbuf_addstr(value, " filter");
1534
1535 if (!repo_config_get_bool(the_repository,
1536 "uploadpack.allowrefinwant",
1537 &allow_ref_in_want) &&
1538 allow_ref_in_want)
1539 strbuf_addstr(value, " ref-in-want");
1540
1541 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1542 (!repo_config_get_bool(the_repository,
1543 "uploadpack.allowsidebandall",
1544 &allow_sideband_all_value) &&
1545 allow_sideband_all_value))
1546 strbuf_addstr(value, " sideband-all");
1547 }
1548
1549 return 1;
1550 }