merge: use refresh_and_write_cache
[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 oid;
532 const char *p;
533
534 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
535 break;
536
537 o = lookup_object(the_repository, &oid);
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 struct packet_writer *writer)
597 {
598 int i;
599
600 /*
601 * In the normal in-process case without
602 * uploadpack.allowReachableSHA1InWant,
603 * non-tip requests can never happen.
604 */
605 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
606 goto error;
607 if (!has_unreachable(want_obj))
608 /* All the non-tip ones are ancestors of what we advertised */
609 return;
610
611 error:
612 /* Pick one of them (we know there at least is one) */
613 for (i = 0; i < want_obj->nr; i++) {
614 struct object *o = want_obj->objects[i].item;
615 if (!is_our_ref(o)) {
616 packet_writer_error(writer,
617 "upload-pack: not our ref %s",
618 oid_to_hex(&o->oid));
619 die("git upload-pack: not our ref %s",
620 oid_to_hex(&o->oid));
621 }
622 }
623 }
624
625 static void send_shallow(struct packet_writer *writer,
626 struct commit_list *result)
627 {
628 while (result) {
629 struct object *object = &result->item->object;
630 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
631 packet_writer_write(writer, "shallow %s",
632 oid_to_hex(&object->oid));
633 register_shallow(the_repository, &object->oid);
634 shallow_nr++;
635 }
636 result = result->next;
637 }
638 }
639
640 static void send_unshallow(struct packet_writer *writer,
641 const struct object_array *shallows,
642 struct object_array *want_obj)
643 {
644 int i;
645
646 for (i = 0; i < shallows->nr; i++) {
647 struct object *object = shallows->objects[i].item;
648 if (object->flags & NOT_SHALLOW) {
649 struct commit_list *parents;
650 packet_writer_write(writer, "unshallow %s",
651 oid_to_hex(&object->oid));
652 object->flags &= ~CLIENT_SHALLOW;
653 /*
654 * We want to _register_ "object" as shallow, but we
655 * also need to traverse object's parents to deepen a
656 * shallow clone. Unregister it for now so we can
657 * parse and add the parents to the want list, then
658 * re-register it.
659 */
660 unregister_shallow(&object->oid);
661 object->parsed = 0;
662 parse_commit_or_die((struct commit *)object);
663 parents = ((struct commit *)object)->parents;
664 while (parents) {
665 add_object_array(&parents->item->object,
666 NULL, want_obj);
667 parents = parents->next;
668 }
669 add_object_array(object, NULL, &extra_edge_obj);
670 }
671 /* make sure commit traversal conforms to client */
672 register_shallow(the_repository, &object->oid);
673 }
674 }
675
676 static int check_ref(const char *refname_full, const struct object_id *oid,
677 int flag, void *cb_data);
678 static void deepen(struct packet_writer *writer, int depth, int deepen_relative,
679 struct object_array *shallows, struct object_array *want_obj)
680 {
681 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
682 int i;
683
684 for (i = 0; i < shallows->nr; i++) {
685 struct object *object = shallows->objects[i].item;
686 object->flags |= NOT_SHALLOW;
687 }
688 } else if (deepen_relative) {
689 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
690 struct commit_list *result;
691
692 /*
693 * Checking for reachable shallows requires that our refs be
694 * marked with OUR_REF.
695 */
696 head_ref_namespaced(check_ref, NULL);
697 for_each_namespaced_ref(check_ref, NULL);
698
699 get_reachable_list(shallows, &reachable_shallows);
700 result = get_shallow_commits(&reachable_shallows,
701 depth + 1,
702 SHALLOW, NOT_SHALLOW);
703 send_shallow(writer, result);
704 free_commit_list(result);
705 object_array_clear(&reachable_shallows);
706 } else {
707 struct commit_list *result;
708
709 result = get_shallow_commits(want_obj, depth,
710 SHALLOW, NOT_SHALLOW);
711 send_shallow(writer, result);
712 free_commit_list(result);
713 }
714
715 send_unshallow(writer, shallows, want_obj);
716 }
717
718 static void deepen_by_rev_list(struct packet_writer *writer, int ac,
719 const char **av,
720 struct object_array *shallows,
721 struct object_array *want_obj)
722 {
723 struct commit_list *result;
724
725 close_commit_graph(the_repository->objects);
726 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
727 send_shallow(writer, result);
728 free_commit_list(result);
729 send_unshallow(writer, shallows, want_obj);
730 }
731
732 /* Returns 1 if a shallow list is sent or 0 otherwise */
733 static int send_shallow_list(struct packet_writer *writer,
734 int depth, int deepen_rev_list,
735 timestamp_t deepen_since,
736 struct string_list *deepen_not,
737 int deepen_relative,
738 struct object_array *shallows,
739 struct object_array *want_obj)
740 {
741 int ret = 0;
742
743 if (depth > 0 && deepen_rev_list)
744 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
745 if (depth > 0) {
746 deepen(writer, depth, deepen_relative, shallows, want_obj);
747 ret = 1;
748 } else if (deepen_rev_list) {
749 struct argv_array av = ARGV_ARRAY_INIT;
750 int i;
751
752 argv_array_push(&av, "rev-list");
753 if (deepen_since)
754 argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
755 if (deepen_not->nr) {
756 argv_array_push(&av, "--not");
757 for (i = 0; i < deepen_not->nr; i++) {
758 struct string_list_item *s = deepen_not->items + i;
759 argv_array_push(&av, s->string);
760 }
761 argv_array_push(&av, "--not");
762 }
763 for (i = 0; i < want_obj->nr; i++) {
764 struct object *o = want_obj->objects[i].item;
765 argv_array_push(&av, oid_to_hex(&o->oid));
766 }
767 deepen_by_rev_list(writer, av.argc, av.argv, shallows, want_obj);
768 argv_array_clear(&av);
769 ret = 1;
770 } else {
771 if (shallows->nr > 0) {
772 int i;
773 for (i = 0; i < shallows->nr; i++)
774 register_shallow(the_repository,
775 &shallows->objects[i].item->oid);
776 }
777 }
778
779 shallow_nr += shallows->nr;
780 return ret;
781 }
782
783 static int process_shallow(const char *line, struct object_array *shallows)
784 {
785 const char *arg;
786 if (skip_prefix(line, "shallow ", &arg)) {
787 struct object_id oid;
788 struct object *object;
789 if (get_oid_hex(arg, &oid))
790 die("invalid shallow line: %s", line);
791 object = parse_object(the_repository, &oid);
792 if (!object)
793 return 1;
794 if (object->type != OBJ_COMMIT)
795 die("invalid shallow object %s", oid_to_hex(&oid));
796 if (!(object->flags & CLIENT_SHALLOW)) {
797 object->flags |= CLIENT_SHALLOW;
798 add_object_array(object, NULL, shallows);
799 }
800 return 1;
801 }
802
803 return 0;
804 }
805
806 static int process_deepen(const char *line, int *depth)
807 {
808 const char *arg;
809 if (skip_prefix(line, "deepen ", &arg)) {
810 char *end = NULL;
811 *depth = (int)strtol(arg, &end, 0);
812 if (!end || *end || *depth <= 0)
813 die("Invalid deepen: %s", line);
814 return 1;
815 }
816
817 return 0;
818 }
819
820 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
821 {
822 const char *arg;
823 if (skip_prefix(line, "deepen-since ", &arg)) {
824 char *end = NULL;
825 *deepen_since = parse_timestamp(arg, &end, 0);
826 if (!end || *end || !deepen_since ||
827 /* revisions.c's max_age -1 is special */
828 *deepen_since == -1)
829 die("Invalid deepen-since: %s", line);
830 *deepen_rev_list = 1;
831 return 1;
832 }
833 return 0;
834 }
835
836 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
837 {
838 const char *arg;
839 if (skip_prefix(line, "deepen-not ", &arg)) {
840 char *ref = NULL;
841 struct object_id oid;
842 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
843 die("git upload-pack: ambiguous deepen-not: %s", line);
844 string_list_append(deepen_not, ref);
845 free(ref);
846 *deepen_rev_list = 1;
847 return 1;
848 }
849 return 0;
850 }
851
852 static void receive_needs(struct packet_reader *reader, struct object_array *want_obj)
853 {
854 struct object_array shallows = OBJECT_ARRAY_INIT;
855 struct string_list deepen_not = STRING_LIST_INIT_DUP;
856 int depth = 0;
857 int has_non_tip = 0;
858 timestamp_t deepen_since = 0;
859 int deepen_rev_list = 0;
860 int deepen_relative = 0;
861 struct packet_writer writer;
862
863 shallow_nr = 0;
864 packet_writer_init(&writer, 1);
865 for (;;) {
866 struct object *o;
867 const char *features;
868 struct object_id oid_buf;
869 const char *arg;
870
871 reset_timeout();
872 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
873 break;
874
875 if (process_shallow(reader->line, &shallows))
876 continue;
877 if (process_deepen(reader->line, &depth))
878 continue;
879 if (process_deepen_since(reader->line, &deepen_since, &deepen_rev_list))
880 continue;
881 if (process_deepen_not(reader->line, &deepen_not, &deepen_rev_list))
882 continue;
883
884 if (skip_prefix(reader->line, "filter ", &arg)) {
885 if (!filter_capability_requested)
886 die("git upload-pack: filtering capability not negotiated");
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 parse_list_objects_filter(&filter_options, p);
1309 continue;
1310 }
1311
1312 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1313 allow_sideband_all) &&
1314 !strcmp(arg, "sideband-all")) {
1315 data->writer.use_sideband = 1;
1316 continue;
1317 }
1318
1319 /* ignore unknown lines maybe? */
1320 die("unexpected line: '%s'", arg);
1321 }
1322 }
1323
1324 static int process_haves(struct oid_array *haves, struct oid_array *common,
1325 struct object_array *have_obj)
1326 {
1327 int i;
1328
1329 /* Process haves */
1330 for (i = 0; i < haves->nr; i++) {
1331 const struct object_id *oid = &haves->oid[i];
1332 struct object *o;
1333 int we_knew_they_have = 0;
1334
1335 if (!has_object_file(oid))
1336 continue;
1337
1338 oid_array_append(common, oid);
1339
1340 o = parse_object(the_repository, oid);
1341 if (!o)
1342 die("oops (%s)", oid_to_hex(oid));
1343 if (o->type == OBJ_COMMIT) {
1344 struct commit_list *parents;
1345 struct commit *commit = (struct commit *)o;
1346 if (o->flags & THEY_HAVE)
1347 we_knew_they_have = 1;
1348 else
1349 o->flags |= THEY_HAVE;
1350 if (!oldest_have || (commit->date < oldest_have))
1351 oldest_have = commit->date;
1352 for (parents = commit->parents;
1353 parents;
1354 parents = parents->next)
1355 parents->item->object.flags |= THEY_HAVE;
1356 }
1357 if (!we_knew_they_have)
1358 add_object_array(o, NULL, have_obj);
1359 }
1360
1361 return 0;
1362 }
1363
1364 static int send_acks(struct packet_writer *writer, struct oid_array *acks,
1365 const struct object_array *have_obj,
1366 struct object_array *want_obj)
1367 {
1368 int i;
1369
1370 packet_writer_write(writer, "acknowledgments\n");
1371
1372 /* Send Acks */
1373 if (!acks->nr)
1374 packet_writer_write(writer, "NAK\n");
1375
1376 for (i = 0; i < acks->nr; i++) {
1377 packet_writer_write(writer, "ACK %s\n",
1378 oid_to_hex(&acks->oid[i]));
1379 }
1380
1381 if (ok_to_give_up(have_obj, want_obj)) {
1382 /* Send Ready */
1383 packet_writer_write(writer, "ready\n");
1384 return 1;
1385 }
1386
1387 return 0;
1388 }
1389
1390 static int process_haves_and_send_acks(struct upload_pack_data *data,
1391 struct object_array *have_obj,
1392 struct object_array *want_obj)
1393 {
1394 struct oid_array common = OID_ARRAY_INIT;
1395 int ret = 0;
1396
1397 process_haves(&data->haves, &common, have_obj);
1398 if (data->done) {
1399 ret = 1;
1400 } else if (send_acks(&data->writer, &common, have_obj, want_obj)) {
1401 packet_writer_delim(&data->writer);
1402 ret = 1;
1403 } else {
1404 /* Add Flush */
1405 packet_writer_flush(&data->writer);
1406 ret = 0;
1407 }
1408
1409 oid_array_clear(&data->haves);
1410 oid_array_clear(&common);
1411 return ret;
1412 }
1413
1414 static void send_wanted_ref_info(struct upload_pack_data *data)
1415 {
1416 const struct string_list_item *item;
1417
1418 if (!data->wanted_refs.nr)
1419 return;
1420
1421 packet_writer_write(&data->writer, "wanted-refs\n");
1422
1423 for_each_string_list_item(item, &data->wanted_refs) {
1424 packet_writer_write(&data->writer, "%s %s\n",
1425 oid_to_hex(item->util),
1426 item->string);
1427 }
1428
1429 packet_writer_delim(&data->writer);
1430 }
1431
1432 static void send_shallow_info(struct upload_pack_data *data,
1433 struct object_array *want_obj)
1434 {
1435 /* No shallow info needs to be sent */
1436 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1437 !is_repository_shallow(the_repository))
1438 return;
1439
1440 packet_writer_write(&data->writer, "shallow-info\n");
1441
1442 if (!send_shallow_list(&data->writer, data->depth,
1443 data->deepen_rev_list,
1444 data->deepen_since, &data->deepen_not,
1445 data->deepen_relative,
1446 &data->shallows, want_obj) &&
1447 is_repository_shallow(the_repository))
1448 deepen(&data->writer, INFINITE_DEPTH, data->deepen_relative,
1449 &data->shallows, want_obj);
1450
1451 packet_delim(1);
1452 }
1453
1454 enum fetch_state {
1455 FETCH_PROCESS_ARGS = 0,
1456 FETCH_SEND_ACKS,
1457 FETCH_SEND_PACK,
1458 FETCH_DONE,
1459 };
1460
1461 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1462 struct packet_reader *request)
1463 {
1464 enum fetch_state state = FETCH_PROCESS_ARGS;
1465 struct upload_pack_data data;
1466 struct object_array have_obj = OBJECT_ARRAY_INIT;
1467 struct object_array want_obj = OBJECT_ARRAY_INIT;
1468
1469 clear_object_flags(ALL_FLAGS);
1470
1471 git_config(upload_pack_config, NULL);
1472
1473 upload_pack_data_init(&data);
1474 use_sideband = LARGE_PACKET_MAX;
1475
1476 while (state != FETCH_DONE) {
1477 switch (state) {
1478 case FETCH_PROCESS_ARGS:
1479 process_args(request, &data, &want_obj);
1480
1481 if (!want_obj.nr) {
1482 /*
1483 * Request didn't contain any 'want' lines,
1484 * guess they didn't want anything.
1485 */
1486 state = FETCH_DONE;
1487 } else if (data.haves.nr) {
1488 /*
1489 * Request had 'have' lines, so lets ACK them.
1490 */
1491 state = FETCH_SEND_ACKS;
1492 } else {
1493 /*
1494 * Request had 'want's but no 'have's so we can
1495 * immedietly go to construct and send a pack.
1496 */
1497 state = FETCH_SEND_PACK;
1498 }
1499 break;
1500 case FETCH_SEND_ACKS:
1501 if (process_haves_and_send_acks(&data, &have_obj,
1502 &want_obj))
1503 state = FETCH_SEND_PACK;
1504 else
1505 state = FETCH_DONE;
1506 break;
1507 case FETCH_SEND_PACK:
1508 send_wanted_ref_info(&data);
1509 send_shallow_info(&data, &want_obj);
1510
1511 packet_writer_write(&data.writer, "packfile\n");
1512 create_pack_file(&have_obj, &want_obj);
1513 state = FETCH_DONE;
1514 break;
1515 case FETCH_DONE:
1516 continue;
1517 }
1518 }
1519
1520 upload_pack_data_clear(&data);
1521 object_array_clear(&have_obj);
1522 object_array_clear(&want_obj);
1523 return 0;
1524 }
1525
1526 int upload_pack_advertise(struct repository *r,
1527 struct strbuf *value)
1528 {
1529 if (value) {
1530 int allow_filter_value;
1531 int allow_ref_in_want;
1532 int allow_sideband_all_value;
1533
1534 strbuf_addstr(value, "shallow");
1535
1536 if (!repo_config_get_bool(the_repository,
1537 "uploadpack.allowfilter",
1538 &allow_filter_value) &&
1539 allow_filter_value)
1540 strbuf_addstr(value, " filter");
1541
1542 if (!repo_config_get_bool(the_repository,
1543 "uploadpack.allowrefinwant",
1544 &allow_ref_in_want) &&
1545 allow_ref_in_want)
1546 strbuf_addstr(value, " ref-in-want");
1547
1548 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1549 (!repo_config_get_bool(the_repository,
1550 "uploadpack.allowsidebandall",
1551 &allow_sideband_all_value) &&
1552 allow_sideband_all_value))
1553 strbuf_addstr(value, " sideband-all");
1554 }
1555
1556 return 1;
1557 }