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[thirdparty/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 #include "shallow.h"
30
31 /* Remember to update object flag allocation in object.h */
32 #define THEY_HAVE (1u << 11)
33 #define OUR_REF (1u << 12)
34 #define WANTED (1u << 13)
35 #define COMMON_KNOWN (1u << 14)
36
37 #define SHALLOW (1u << 16)
38 #define NOT_SHALLOW (1u << 17)
39 #define CLIENT_SHALLOW (1u << 18)
40 #define HIDDEN_REF (1u << 19)
41
42 #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \
43 NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF)
44
45 static timestamp_t oldest_have;
46
47 /* Allow specifying sha1 if it is a ref tip. */
48 #define ALLOW_TIP_SHA1 01
49 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
50 #define ALLOW_REACHABLE_SHA1 02
51 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
52 #define ALLOW_ANY_SHA1 07
53 static unsigned int allow_unadvertised_object_request;
54 static int shallow_nr;
55 static struct object_array extra_edge_obj;
56
57 /*
58 * Please annotate, and if possible group together, fields used only
59 * for protocol v0 or only for protocol v2.
60 */
61 struct upload_pack_data {
62 struct string_list symref; /* v0 only */
63 struct object_array want_obj;
64 struct object_array have_obj;
65 struct oid_array haves; /* v2 only */
66 struct string_list wanted_refs; /* v2 only */
67
68 struct object_array shallows;
69 struct string_list deepen_not;
70 int depth;
71 timestamp_t deepen_since;
72 int deepen_rev_list;
73 int deepen_relative;
74 int keepalive;
75
76 unsigned int timeout; /* v0 only */
77 enum {
78 NO_MULTI_ACK = 0,
79 MULTI_ACK = 1,
80 MULTI_ACK_DETAILED = 2
81 } multi_ack; /* v0 only */
82
83 /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */
84 int use_sideband;
85
86 struct list_objects_filter_options filter_options;
87
88 struct packet_writer writer;
89
90 const char *pack_objects_hook;
91
92 unsigned stateless_rpc : 1; /* v0 only */
93 unsigned no_done : 1; /* v0 only */
94 unsigned daemon_mode : 1; /* v0 only */
95 unsigned filter_capability_requested : 1; /* v0 only */
96
97 unsigned use_thin_pack : 1;
98 unsigned use_ofs_delta : 1;
99 unsigned no_progress : 1;
100 unsigned use_include_tag : 1;
101 unsigned allow_filter : 1;
102
103 unsigned done : 1; /* v2 only */
104 unsigned allow_ref_in_want : 1; /* v2 only */
105 unsigned allow_sideband_all : 1; /* v2 only */
106 };
107
108 static void upload_pack_data_init(struct upload_pack_data *data)
109 {
110 struct string_list symref = STRING_LIST_INIT_DUP;
111 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
112 struct object_array want_obj = OBJECT_ARRAY_INIT;
113 struct object_array have_obj = OBJECT_ARRAY_INIT;
114 struct oid_array haves = OID_ARRAY_INIT;
115 struct object_array shallows = OBJECT_ARRAY_INIT;
116 struct string_list deepen_not = STRING_LIST_INIT_DUP;
117
118 memset(data, 0, sizeof(*data));
119 data->symref = symref;
120 data->wanted_refs = wanted_refs;
121 data->want_obj = want_obj;
122 data->have_obj = have_obj;
123 data->haves = haves;
124 data->shallows = shallows;
125 data->deepen_not = deepen_not;
126 packet_writer_init(&data->writer, 1);
127
128 data->keepalive = 5;
129 }
130
131 static void upload_pack_data_clear(struct upload_pack_data *data)
132 {
133 string_list_clear(&data->symref, 1);
134 string_list_clear(&data->wanted_refs, 1);
135 object_array_clear(&data->want_obj);
136 object_array_clear(&data->have_obj);
137 oid_array_clear(&data->haves);
138 object_array_clear(&data->shallows);
139 string_list_clear(&data->deepen_not, 0);
140 list_objects_filter_release(&data->filter_options);
141
142 free((char *)data->pack_objects_hook);
143 }
144
145 static void reset_timeout(unsigned int timeout)
146 {
147 alarm(timeout);
148 }
149
150 static void send_client_data(int fd, const char *data, ssize_t sz,
151 int use_sideband)
152 {
153 if (use_sideband) {
154 send_sideband(1, fd, data, sz, use_sideband);
155 return;
156 }
157 if (fd == 3)
158 /* emergency quit */
159 fd = 2;
160 if (fd == 2) {
161 /* XXX: are we happy to lose stuff here? */
162 xwrite(fd, data, sz);
163 return;
164 }
165 write_or_die(fd, data, sz);
166 }
167
168 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
169 {
170 FILE *fp = cb_data;
171 if (graft->nr_parent == -1)
172 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
173 return 0;
174 }
175
176 static void create_pack_file(struct upload_pack_data *pack_data)
177 {
178 struct child_process pack_objects = CHILD_PROCESS_INIT;
179 char data[8193], progress[128];
180 char abort_msg[] = "aborting due to possible repository "
181 "corruption on the remote side.";
182 int buffered = -1;
183 ssize_t sz;
184 int i;
185 FILE *pipe_fd;
186
187 if (!pack_data->pack_objects_hook)
188 pack_objects.git_cmd = 1;
189 else {
190 argv_array_push(&pack_objects.args, pack_data->pack_objects_hook);
191 argv_array_push(&pack_objects.args, "git");
192 pack_objects.use_shell = 1;
193 }
194
195 if (shallow_nr) {
196 argv_array_push(&pack_objects.args, "--shallow-file");
197 argv_array_push(&pack_objects.args, "");
198 }
199 argv_array_push(&pack_objects.args, "pack-objects");
200 argv_array_push(&pack_objects.args, "--revs");
201 if (pack_data->use_thin_pack)
202 argv_array_push(&pack_objects.args, "--thin");
203
204 argv_array_push(&pack_objects.args, "--stdout");
205 if (shallow_nr)
206 argv_array_push(&pack_objects.args, "--shallow");
207 if (!pack_data->no_progress)
208 argv_array_push(&pack_objects.args, "--progress");
209 if (pack_data->use_ofs_delta)
210 argv_array_push(&pack_objects.args, "--delta-base-offset");
211 if (pack_data->use_include_tag)
212 argv_array_push(&pack_objects.args, "--include-tag");
213 if (pack_data->filter_options.choice) {
214 const char *spec =
215 expand_list_objects_filter_spec(&pack_data->filter_options);
216 if (pack_objects.use_shell) {
217 struct strbuf buf = STRBUF_INIT;
218 sq_quote_buf(&buf, spec);
219 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
220 strbuf_release(&buf);
221 } else {
222 argv_array_pushf(&pack_objects.args, "--filter=%s",
223 spec);
224 }
225 }
226
227 pack_objects.in = -1;
228 pack_objects.out = -1;
229 pack_objects.err = -1;
230
231 if (start_command(&pack_objects))
232 die("git upload-pack: unable to fork git-pack-objects");
233
234 pipe_fd = xfdopen(pack_objects.in, "w");
235
236 if (shallow_nr)
237 for_each_commit_graft(write_one_shallow, pipe_fd);
238
239 for (i = 0; i < pack_data->want_obj.nr; i++)
240 fprintf(pipe_fd, "%s\n",
241 oid_to_hex(&pack_data->want_obj.objects[i].item->oid));
242 fprintf(pipe_fd, "--not\n");
243 for (i = 0; i < pack_data->have_obj.nr; i++)
244 fprintf(pipe_fd, "%s\n",
245 oid_to_hex(&pack_data->have_obj.objects[i].item->oid));
246 for (i = 0; i < extra_edge_obj.nr; i++)
247 fprintf(pipe_fd, "%s\n",
248 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
249 fprintf(pipe_fd, "\n");
250 fflush(pipe_fd);
251 fclose(pipe_fd);
252
253 /* We read from pack_objects.err to capture stderr output for
254 * progress bar, and pack_objects.out to capture the pack data.
255 */
256
257 while (1) {
258 struct pollfd pfd[2];
259 int pe, pu, pollsize, polltimeout;
260 int ret;
261
262 reset_timeout(pack_data->timeout);
263
264 pollsize = 0;
265 pe = pu = -1;
266
267 if (0 <= pack_objects.out) {
268 pfd[pollsize].fd = pack_objects.out;
269 pfd[pollsize].events = POLLIN;
270 pu = pollsize;
271 pollsize++;
272 }
273 if (0 <= pack_objects.err) {
274 pfd[pollsize].fd = pack_objects.err;
275 pfd[pollsize].events = POLLIN;
276 pe = pollsize;
277 pollsize++;
278 }
279
280 if (!pollsize)
281 break;
282
283 polltimeout = pack_data->keepalive < 0
284 ? -1
285 : 1000 * pack_data->keepalive;
286
287 ret = poll(pfd, pollsize, polltimeout);
288
289 if (ret < 0) {
290 if (errno != EINTR) {
291 error_errno("poll failed, resuming");
292 sleep(1);
293 }
294 continue;
295 }
296 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
297 /* Status ready; we ship that in the side-band
298 * or dump to the standard error.
299 */
300 sz = xread(pack_objects.err, progress,
301 sizeof(progress));
302 if (0 < sz)
303 send_client_data(2, progress, sz,
304 pack_data->use_sideband);
305 else if (sz == 0) {
306 close(pack_objects.err);
307 pack_objects.err = -1;
308 }
309 else
310 goto fail;
311 /* give priority to status messages */
312 continue;
313 }
314 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
315 /* Data ready; we keep the last byte to ourselves
316 * in case we detect broken rev-list, so that we
317 * can leave the stream corrupted. This is
318 * unfortunate -- unpack-objects would happily
319 * accept a valid packdata with trailing garbage,
320 * so appending garbage after we pass all the
321 * pack data is not good enough to signal
322 * breakage to downstream.
323 */
324 char *cp = data;
325 ssize_t outsz = 0;
326 if (0 <= buffered) {
327 *cp++ = buffered;
328 outsz++;
329 }
330 sz = xread(pack_objects.out, cp,
331 sizeof(data) - outsz);
332 if (0 < sz)
333 ;
334 else if (sz == 0) {
335 close(pack_objects.out);
336 pack_objects.out = -1;
337 }
338 else
339 goto fail;
340 sz += outsz;
341 if (1 < sz) {
342 buffered = data[sz-1] & 0xFF;
343 sz--;
344 }
345 else
346 buffered = -1;
347 send_client_data(1, data, sz,
348 pack_data->use_sideband);
349 }
350
351 /*
352 * We hit the keepalive timeout without saying anything; send
353 * an empty message on the data sideband just to let the other
354 * side know we're still working on it, but don't have any data
355 * yet.
356 *
357 * If we don't have a sideband channel, there's no room in the
358 * protocol to say anything, so those clients are just out of
359 * luck.
360 */
361 if (!ret && pack_data->use_sideband) {
362 static const char buf[] = "0005\1";
363 write_or_die(1, buf, 5);
364 }
365 }
366
367 if (finish_command(&pack_objects)) {
368 error("git upload-pack: git-pack-objects died with error.");
369 goto fail;
370 }
371
372 /* flush the data */
373 if (0 <= buffered) {
374 data[0] = buffered;
375 send_client_data(1, data, 1,
376 pack_data->use_sideband);
377 fprintf(stderr, "flushed.\n");
378 }
379 if (pack_data->use_sideband)
380 packet_flush(1);
381 return;
382
383 fail:
384 send_client_data(3, abort_msg, sizeof(abort_msg),
385 pack_data->use_sideband);
386 die("git upload-pack: %s", abort_msg);
387 }
388
389 static int got_oid(const char *hex, struct object_id *oid,
390 struct object_array *have_obj)
391 {
392 struct object *o;
393 int we_knew_they_have = 0;
394
395 if (get_oid_hex(hex, oid))
396 die("git upload-pack: expected SHA1 object, got '%s'", hex);
397 if (!has_object_file(oid))
398 return -1;
399
400 o = parse_object(the_repository, oid);
401 if (!o)
402 die("oops (%s)", oid_to_hex(oid));
403 if (o->type == OBJ_COMMIT) {
404 struct commit_list *parents;
405 struct commit *commit = (struct commit *)o;
406 if (o->flags & THEY_HAVE)
407 we_knew_they_have = 1;
408 else
409 o->flags |= THEY_HAVE;
410 if (!oldest_have || (commit->date < oldest_have))
411 oldest_have = commit->date;
412 for (parents = commit->parents;
413 parents;
414 parents = parents->next)
415 parents->item->object.flags |= THEY_HAVE;
416 }
417 if (!we_knew_they_have) {
418 add_object_array(o, NULL, have_obj);
419 return 1;
420 }
421 return 0;
422 }
423
424 static int ok_to_give_up(const struct object_array *have_obj,
425 struct object_array *want_obj)
426 {
427 uint32_t min_generation = GENERATION_NUMBER_ZERO;
428
429 if (!have_obj->nr)
430 return 0;
431
432 return can_all_from_reach_with_flag(want_obj, THEY_HAVE,
433 COMMON_KNOWN, oldest_have,
434 min_generation);
435 }
436
437 static int get_common_commits(struct upload_pack_data *data,
438 struct packet_reader *reader)
439 {
440 struct object_id oid;
441 char last_hex[GIT_MAX_HEXSZ + 1];
442 int got_common = 0;
443 int got_other = 0;
444 int sent_ready = 0;
445
446 save_commit_buffer = 0;
447
448 for (;;) {
449 const char *arg;
450
451 reset_timeout(data->timeout);
452
453 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
454 if (data->multi_ack == MULTI_ACK_DETAILED
455 && got_common
456 && !got_other
457 && ok_to_give_up(&data->have_obj, &data->want_obj)) {
458 sent_ready = 1;
459 packet_write_fmt(1, "ACK %s ready\n", last_hex);
460 }
461 if (data->have_obj.nr == 0 || data->multi_ack)
462 packet_write_fmt(1, "NAK\n");
463
464 if (data->no_done && sent_ready) {
465 packet_write_fmt(1, "ACK %s\n", last_hex);
466 return 0;
467 }
468 if (data->stateless_rpc)
469 exit(0);
470 got_common = 0;
471 got_other = 0;
472 continue;
473 }
474 if (skip_prefix(reader->line, "have ", &arg)) {
475 switch (got_oid(arg, &oid, &data->have_obj)) {
476 case -1: /* they have what we do not */
477 got_other = 1;
478 if (data->multi_ack
479 && ok_to_give_up(&data->have_obj, &data->want_obj)) {
480 const char *hex = oid_to_hex(&oid);
481 if (data->multi_ack == MULTI_ACK_DETAILED) {
482 sent_ready = 1;
483 packet_write_fmt(1, "ACK %s ready\n", hex);
484 } else
485 packet_write_fmt(1, "ACK %s continue\n", hex);
486 }
487 break;
488 default:
489 got_common = 1;
490 oid_to_hex_r(last_hex, &oid);
491 if (data->multi_ack == MULTI_ACK_DETAILED)
492 packet_write_fmt(1, "ACK %s common\n", last_hex);
493 else if (data->multi_ack)
494 packet_write_fmt(1, "ACK %s continue\n", last_hex);
495 else if (data->have_obj.nr == 1)
496 packet_write_fmt(1, "ACK %s\n", last_hex);
497 break;
498 }
499 continue;
500 }
501 if (!strcmp(reader->line, "done")) {
502 if (data->have_obj.nr > 0) {
503 if (data->multi_ack)
504 packet_write_fmt(1, "ACK %s\n", last_hex);
505 return 0;
506 }
507 packet_write_fmt(1, "NAK\n");
508 return -1;
509 }
510 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
511 }
512 }
513
514 static int is_our_ref(struct object *o)
515 {
516 int allow_hidden_ref = (allow_unadvertised_object_request &
517 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
518 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
519 }
520
521 /*
522 * on successful case, it's up to the caller to close cmd->out
523 */
524 static int do_reachable_revlist(struct child_process *cmd,
525 struct object_array *src,
526 struct object_array *reachable)
527 {
528 static const char *argv[] = {
529 "rev-list", "--stdin", NULL,
530 };
531 struct object *o;
532 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
533 int i;
534 const unsigned hexsz = the_hash_algo->hexsz;
535
536 cmd->argv = argv;
537 cmd->git_cmd = 1;
538 cmd->no_stderr = 1;
539 cmd->in = -1;
540 cmd->out = -1;
541
542 /*
543 * If the next rev-list --stdin encounters an unknown commit,
544 * it terminates, which will cause SIGPIPE in the write loop
545 * below.
546 */
547 sigchain_push(SIGPIPE, SIG_IGN);
548
549 if (start_command(cmd))
550 goto error;
551
552 namebuf[0] = '^';
553 namebuf[hexsz + 1] = '\n';
554 for (i = get_max_object_index(); 0 < i; ) {
555 o = get_indexed_object(--i);
556 if (!o)
557 continue;
558 if (reachable && o->type == OBJ_COMMIT)
559 o->flags &= ~TMP_MARK;
560 if (!is_our_ref(o))
561 continue;
562 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
563 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
564 goto error;
565 }
566 namebuf[hexsz] = '\n';
567 for (i = 0; i < src->nr; i++) {
568 o = src->objects[i].item;
569 if (is_our_ref(o)) {
570 if (reachable)
571 add_object_array(o, NULL, reachable);
572 continue;
573 }
574 if (reachable && o->type == OBJ_COMMIT)
575 o->flags |= TMP_MARK;
576 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
577 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
578 goto error;
579 }
580 close(cmd->in);
581 cmd->in = -1;
582 sigchain_pop(SIGPIPE);
583
584 return 0;
585
586 error:
587 sigchain_pop(SIGPIPE);
588
589 if (cmd->in >= 0)
590 close(cmd->in);
591 if (cmd->out >= 0)
592 close(cmd->out);
593 return -1;
594 }
595
596 static int get_reachable_list(struct object_array *src,
597 struct object_array *reachable)
598 {
599 struct child_process cmd = CHILD_PROCESS_INIT;
600 int i;
601 struct object *o;
602 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
603 const unsigned hexsz = the_hash_algo->hexsz;
604
605 if (do_reachable_revlist(&cmd, src, reachable) < 0)
606 return -1;
607
608 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
609 struct object_id oid;
610 const char *p;
611
612 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
613 break;
614
615 o = lookup_object(the_repository, &oid);
616 if (o && o->type == OBJ_COMMIT) {
617 o->flags &= ~TMP_MARK;
618 }
619 }
620 for (i = get_max_object_index(); 0 < i; i--) {
621 o = get_indexed_object(i - 1);
622 if (o && o->type == OBJ_COMMIT &&
623 (o->flags & TMP_MARK)) {
624 add_object_array(o, NULL, reachable);
625 o->flags &= ~TMP_MARK;
626 }
627 }
628 close(cmd.out);
629
630 if (finish_command(&cmd))
631 return -1;
632
633 return 0;
634 }
635
636 static int has_unreachable(struct object_array *src)
637 {
638 struct child_process cmd = CHILD_PROCESS_INIT;
639 char buf[1];
640 int i;
641
642 if (do_reachable_revlist(&cmd, src, NULL) < 0)
643 return 1;
644
645 /*
646 * The commits out of the rev-list are not ancestors of
647 * our ref.
648 */
649 i = read_in_full(cmd.out, buf, 1);
650 if (i)
651 goto error;
652 close(cmd.out);
653 cmd.out = -1;
654
655 /*
656 * rev-list may have died by encountering a bad commit
657 * in the history, in which case we do want to bail out
658 * even when it showed no commit.
659 */
660 if (finish_command(&cmd))
661 goto error;
662
663 /* All the non-tip ones are ancestors of what we advertised */
664 return 0;
665
666 error:
667 sigchain_pop(SIGPIPE);
668 if (cmd.out >= 0)
669 close(cmd.out);
670 return 1;
671 }
672
673 static void check_non_tip(struct upload_pack_data *data)
674 {
675 int i;
676
677 /*
678 * In the normal in-process case without
679 * uploadpack.allowReachableSHA1InWant,
680 * non-tip requests can never happen.
681 */
682 if (!data->stateless_rpc
683 && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
684 goto error;
685 if (!has_unreachable(&data->want_obj))
686 /* All the non-tip ones are ancestors of what we advertised */
687 return;
688
689 error:
690 /* Pick one of them (we know there at least is one) */
691 for (i = 0; i < data->want_obj.nr; i++) {
692 struct object *o = data->want_obj.objects[i].item;
693 if (!is_our_ref(o)) {
694 packet_writer_error(&data->writer,
695 "upload-pack: not our ref %s",
696 oid_to_hex(&o->oid));
697 die("git upload-pack: not our ref %s",
698 oid_to_hex(&o->oid));
699 }
700 }
701 }
702
703 static void send_shallow(struct packet_writer *writer,
704 struct commit_list *result)
705 {
706 while (result) {
707 struct object *object = &result->item->object;
708 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
709 packet_writer_write(writer, "shallow %s",
710 oid_to_hex(&object->oid));
711 register_shallow(the_repository, &object->oid);
712 shallow_nr++;
713 }
714 result = result->next;
715 }
716 }
717
718 static void send_unshallow(struct packet_writer *writer,
719 const struct object_array *shallows,
720 struct object_array *want_obj)
721 {
722 int i;
723
724 for (i = 0; i < shallows->nr; i++) {
725 struct object *object = shallows->objects[i].item;
726 if (object->flags & NOT_SHALLOW) {
727 struct commit_list *parents;
728 packet_writer_write(writer, "unshallow %s",
729 oid_to_hex(&object->oid));
730 object->flags &= ~CLIENT_SHALLOW;
731 /*
732 * We want to _register_ "object" as shallow, but we
733 * also need to traverse object's parents to deepen a
734 * shallow clone. Unregister it for now so we can
735 * parse and add the parents to the want list, then
736 * re-register it.
737 */
738 unregister_shallow(&object->oid);
739 object->parsed = 0;
740 parse_commit_or_die((struct commit *)object);
741 parents = ((struct commit *)object)->parents;
742 while (parents) {
743 add_object_array(&parents->item->object,
744 NULL, want_obj);
745 parents = parents->next;
746 }
747 add_object_array(object, NULL, &extra_edge_obj);
748 }
749 /* make sure commit traversal conforms to client */
750 register_shallow(the_repository, &object->oid);
751 }
752 }
753
754 static int check_ref(const char *refname_full, const struct object_id *oid,
755 int flag, void *cb_data);
756 static void deepen(struct upload_pack_data *data, int depth)
757 {
758 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
759 int i;
760
761 for (i = 0; i < data->shallows.nr; i++) {
762 struct object *object = data->shallows.objects[i].item;
763 object->flags |= NOT_SHALLOW;
764 }
765 } else if (data->deepen_relative) {
766 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
767 struct commit_list *result;
768
769 /*
770 * Checking for reachable shallows requires that our refs be
771 * marked with OUR_REF.
772 */
773 head_ref_namespaced(check_ref, NULL);
774 for_each_namespaced_ref(check_ref, NULL);
775
776 get_reachable_list(&data->shallows, &reachable_shallows);
777 result = get_shallow_commits(&reachable_shallows,
778 depth + 1,
779 SHALLOW, NOT_SHALLOW);
780 send_shallow(&data->writer, result);
781 free_commit_list(result);
782 object_array_clear(&reachable_shallows);
783 } else {
784 struct commit_list *result;
785
786 result = get_shallow_commits(&data->want_obj, depth,
787 SHALLOW, NOT_SHALLOW);
788 send_shallow(&data->writer, result);
789 free_commit_list(result);
790 }
791
792 send_unshallow(&data->writer, &data->shallows, &data->want_obj);
793 }
794
795 static void deepen_by_rev_list(struct packet_writer *writer, int ac,
796 const char **av,
797 struct object_array *shallows,
798 struct object_array *want_obj)
799 {
800 struct commit_list *result;
801
802 disable_commit_graph(the_repository);
803 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
804 send_shallow(writer, result);
805 free_commit_list(result);
806 send_unshallow(writer, shallows, want_obj);
807 }
808
809 /* Returns 1 if a shallow list is sent or 0 otherwise */
810 static int send_shallow_list(struct upload_pack_data *data)
811 {
812 int ret = 0;
813
814 if (data->depth > 0 && data->deepen_rev_list)
815 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
816 if (data->depth > 0) {
817 deepen(data, data->depth);
818 ret = 1;
819 } else if (data->deepen_rev_list) {
820 struct argv_array av = ARGV_ARRAY_INIT;
821 int i;
822
823 argv_array_push(&av, "rev-list");
824 if (data->deepen_since)
825 argv_array_pushf(&av, "--max-age=%"PRItime, data->deepen_since);
826 if (data->deepen_not.nr) {
827 argv_array_push(&av, "--not");
828 for (i = 0; i < data->deepen_not.nr; i++) {
829 struct string_list_item *s = data->deepen_not.items + i;
830 argv_array_push(&av, s->string);
831 }
832 argv_array_push(&av, "--not");
833 }
834 for (i = 0; i < data->want_obj.nr; i++) {
835 struct object *o = data->want_obj.objects[i].item;
836 argv_array_push(&av, oid_to_hex(&o->oid));
837 }
838 deepen_by_rev_list(&data->writer, av.argc, av.argv,
839 &data->shallows, &data->want_obj);
840 argv_array_clear(&av);
841 ret = 1;
842 } else {
843 if (data->shallows.nr > 0) {
844 int i;
845 for (i = 0; i < data->shallows.nr; i++)
846 register_shallow(the_repository,
847 &data->shallows.objects[i].item->oid);
848 }
849 }
850
851 shallow_nr += data->shallows.nr;
852 return ret;
853 }
854
855 static int process_shallow(const char *line, struct object_array *shallows)
856 {
857 const char *arg;
858 if (skip_prefix(line, "shallow ", &arg)) {
859 struct object_id oid;
860 struct object *object;
861 if (get_oid_hex(arg, &oid))
862 die("invalid shallow line: %s", line);
863 object = parse_object(the_repository, &oid);
864 if (!object)
865 return 1;
866 if (object->type != OBJ_COMMIT)
867 die("invalid shallow object %s", oid_to_hex(&oid));
868 if (!(object->flags & CLIENT_SHALLOW)) {
869 object->flags |= CLIENT_SHALLOW;
870 add_object_array(object, NULL, shallows);
871 }
872 return 1;
873 }
874
875 return 0;
876 }
877
878 static int process_deepen(const char *line, int *depth)
879 {
880 const char *arg;
881 if (skip_prefix(line, "deepen ", &arg)) {
882 char *end = NULL;
883 *depth = (int)strtol(arg, &end, 0);
884 if (!end || *end || *depth <= 0)
885 die("Invalid deepen: %s", line);
886 return 1;
887 }
888
889 return 0;
890 }
891
892 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
893 {
894 const char *arg;
895 if (skip_prefix(line, "deepen-since ", &arg)) {
896 char *end = NULL;
897 *deepen_since = parse_timestamp(arg, &end, 0);
898 if (!end || *end || !deepen_since ||
899 /* revisions.c's max_age -1 is special */
900 *deepen_since == -1)
901 die("Invalid deepen-since: %s", line);
902 *deepen_rev_list = 1;
903 return 1;
904 }
905 return 0;
906 }
907
908 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
909 {
910 const char *arg;
911 if (skip_prefix(line, "deepen-not ", &arg)) {
912 char *ref = NULL;
913 struct object_id oid;
914 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
915 die("git upload-pack: ambiguous deepen-not: %s", line);
916 string_list_append(deepen_not, ref);
917 free(ref);
918 *deepen_rev_list = 1;
919 return 1;
920 }
921 return 0;
922 }
923
924 static void receive_needs(struct upload_pack_data *data,
925 struct packet_reader *reader)
926 {
927 int has_non_tip = 0;
928
929 shallow_nr = 0;
930 for (;;) {
931 struct object *o;
932 const char *features;
933 struct object_id oid_buf;
934 const char *arg;
935
936 reset_timeout(data->timeout);
937 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
938 break;
939
940 if (process_shallow(reader->line, &data->shallows))
941 continue;
942 if (process_deepen(reader->line, &data->depth))
943 continue;
944 if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list))
945 continue;
946 if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list))
947 continue;
948
949 if (skip_prefix(reader->line, "filter ", &arg)) {
950 if (!data->filter_capability_requested)
951 die("git upload-pack: filtering capability not negotiated");
952 list_objects_filter_die_if_populated(&data->filter_options);
953 parse_list_objects_filter(&data->filter_options, arg);
954 continue;
955 }
956
957 if (!skip_prefix(reader->line, "want ", &arg) ||
958 parse_oid_hex(arg, &oid_buf, &features))
959 die("git upload-pack: protocol error, "
960 "expected to get object ID, not '%s'", reader->line);
961
962 if (parse_feature_request(features, "deepen-relative"))
963 data->deepen_relative = 1;
964 if (parse_feature_request(features, "multi_ack_detailed"))
965 data->multi_ack = MULTI_ACK_DETAILED;
966 else if (parse_feature_request(features, "multi_ack"))
967 data->multi_ack = MULTI_ACK;
968 if (parse_feature_request(features, "no-done"))
969 data->no_done = 1;
970 if (parse_feature_request(features, "thin-pack"))
971 data->use_thin_pack = 1;
972 if (parse_feature_request(features, "ofs-delta"))
973 data->use_ofs_delta = 1;
974 if (parse_feature_request(features, "side-band-64k"))
975 data->use_sideband = LARGE_PACKET_MAX;
976 else if (parse_feature_request(features, "side-band"))
977 data->use_sideband = DEFAULT_PACKET_MAX;
978 if (parse_feature_request(features, "no-progress"))
979 data->no_progress = 1;
980 if (parse_feature_request(features, "include-tag"))
981 data->use_include_tag = 1;
982 if (data->allow_filter &&
983 parse_feature_request(features, "filter"))
984 data->filter_capability_requested = 1;
985
986 o = parse_object(the_repository, &oid_buf);
987 if (!o) {
988 packet_writer_error(&data->writer,
989 "upload-pack: not our ref %s",
990 oid_to_hex(&oid_buf));
991 die("git upload-pack: not our ref %s",
992 oid_to_hex(&oid_buf));
993 }
994 if (!(o->flags & WANTED)) {
995 o->flags |= WANTED;
996 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
997 || is_our_ref(o)))
998 has_non_tip = 1;
999 add_object_array(o, NULL, &data->want_obj);
1000 }
1001 }
1002
1003 /*
1004 * We have sent all our refs already, and the other end
1005 * should have chosen out of them. When we are operating
1006 * in the stateless RPC mode, however, their choice may
1007 * have been based on the set of older refs advertised
1008 * by another process that handled the initial request.
1009 */
1010 if (has_non_tip)
1011 check_non_tip(data);
1012
1013 if (!data->use_sideband && data->daemon_mode)
1014 data->no_progress = 1;
1015
1016 if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
1017 return;
1018
1019 if (send_shallow_list(data))
1020 packet_flush(1);
1021 }
1022
1023 /* return non-zero if the ref is hidden, otherwise 0 */
1024 static int mark_our_ref(const char *refname, const char *refname_full,
1025 const struct object_id *oid)
1026 {
1027 struct object *o = lookup_unknown_object(oid);
1028
1029 if (ref_is_hidden(refname, refname_full)) {
1030 o->flags |= HIDDEN_REF;
1031 return 1;
1032 }
1033 o->flags |= OUR_REF;
1034 return 0;
1035 }
1036
1037 static int check_ref(const char *refname_full, const struct object_id *oid,
1038 int flag, void *cb_data)
1039 {
1040 const char *refname = strip_namespace(refname_full);
1041
1042 mark_our_ref(refname, refname_full, oid);
1043 return 0;
1044 }
1045
1046 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
1047 {
1048 struct string_list_item *item;
1049
1050 if (!symref->nr)
1051 return;
1052 for_each_string_list_item(item, symref)
1053 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
1054 }
1055
1056 static int send_ref(const char *refname, const struct object_id *oid,
1057 int flag, void *cb_data)
1058 {
1059 static const char *capabilities = "multi_ack thin-pack side-band"
1060 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1061 " deepen-relative no-progress include-tag multi_ack_detailed";
1062 const char *refname_nons = strip_namespace(refname);
1063 struct object_id peeled;
1064 struct upload_pack_data *data = cb_data;
1065
1066 if (mark_our_ref(refname_nons, refname, oid))
1067 return 0;
1068
1069 if (capabilities) {
1070 struct strbuf symref_info = STRBUF_INIT;
1071
1072 format_symref_info(&symref_info, &data->symref);
1073 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
1074 oid_to_hex(oid), refname_nons,
1075 0, capabilities,
1076 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
1077 " allow-tip-sha1-in-want" : "",
1078 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
1079 " allow-reachable-sha1-in-want" : "",
1080 data->stateless_rpc ? " no-done" : "",
1081 symref_info.buf,
1082 data->allow_filter ? " filter" : "",
1083 git_user_agent_sanitized());
1084 strbuf_release(&symref_info);
1085 } else {
1086 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1087 }
1088 capabilities = NULL;
1089 if (!peel_ref(refname, &peeled))
1090 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1091 return 0;
1092 }
1093
1094 static int find_symref(const char *refname, const struct object_id *oid,
1095 int flag, void *cb_data)
1096 {
1097 const char *symref_target;
1098 struct string_list_item *item;
1099
1100 if ((flag & REF_ISSYMREF) == 0)
1101 return 0;
1102 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1103 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1104 die("'%s' is a symref but it is not?", refname);
1105 item = string_list_append(cb_data, strip_namespace(refname));
1106 item->util = xstrdup(strip_namespace(symref_target));
1107 return 0;
1108 }
1109
1110 static int upload_pack_config(const char *var, const char *value, void *cb_data)
1111 {
1112 struct upload_pack_data *data = cb_data;
1113
1114 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1115 if (git_config_bool(var, value))
1116 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1117 else
1118 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1119 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1120 if (git_config_bool(var, value))
1121 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1122 else
1123 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1124 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1125 if (git_config_bool(var, value))
1126 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1127 else
1128 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1129 } else if (!strcmp("uploadpack.keepalive", var)) {
1130 data->keepalive = git_config_int(var, value);
1131 if (!data->keepalive)
1132 data->keepalive = -1;
1133 } else if (!strcmp("uploadpack.allowfilter", var)) {
1134 data->allow_filter = git_config_bool(var, value);
1135 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1136 data->allow_ref_in_want = git_config_bool(var, value);
1137 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1138 data->allow_sideband_all = git_config_bool(var, value);
1139 } else if (!strcmp("core.precomposeunicode", var)) {
1140 precomposed_unicode = git_config_bool(var, value);
1141 }
1142
1143 if (current_config_scope() != CONFIG_SCOPE_LOCAL &&
1144 current_config_scope() != CONFIG_SCOPE_WORKTREE) {
1145 if (!strcmp("uploadpack.packobjectshook", var))
1146 return git_config_string(&data->pack_objects_hook, var, value);
1147 }
1148
1149 return parse_hide_refs_config(var, value, "uploadpack");
1150 }
1151
1152 void upload_pack(struct upload_pack_options *options)
1153 {
1154 struct packet_reader reader;
1155 struct upload_pack_data data;
1156
1157 upload_pack_data_init(&data);
1158
1159 git_config(upload_pack_config, &data);
1160
1161 data.stateless_rpc = options->stateless_rpc;
1162 data.daemon_mode = options->daemon_mode;
1163 data.timeout = options->timeout;
1164
1165 head_ref_namespaced(find_symref, &data.symref);
1166
1167 if (options->advertise_refs || !data.stateless_rpc) {
1168 reset_timeout(data.timeout);
1169 head_ref_namespaced(send_ref, &data);
1170 for_each_namespaced_ref(send_ref, &data);
1171 advertise_shallow_grafts(1);
1172 packet_flush(1);
1173 } else {
1174 head_ref_namespaced(check_ref, NULL);
1175 for_each_namespaced_ref(check_ref, NULL);
1176 }
1177
1178 if (!options->advertise_refs) {
1179 packet_reader_init(&reader, 0, NULL, 0,
1180 PACKET_READ_CHOMP_NEWLINE |
1181 PACKET_READ_DIE_ON_ERR_PACKET);
1182
1183 receive_needs(&data, &reader);
1184 if (data.want_obj.nr) {
1185 get_common_commits(&data, &reader);
1186 create_pack_file(&data);
1187 }
1188 }
1189
1190 upload_pack_data_clear(&data);
1191 }
1192
1193 static int parse_want(struct packet_writer *writer, const char *line,
1194 struct object_array *want_obj)
1195 {
1196 const char *arg;
1197 if (skip_prefix(line, "want ", &arg)) {
1198 struct object_id oid;
1199 struct object *o;
1200
1201 if (get_oid_hex(arg, &oid))
1202 die("git upload-pack: protocol error, "
1203 "expected to get oid, not '%s'", line);
1204
1205 o = parse_object(the_repository, &oid);
1206 if (!o) {
1207 packet_writer_error(writer,
1208 "upload-pack: not our ref %s",
1209 oid_to_hex(&oid));
1210 die("git upload-pack: not our ref %s",
1211 oid_to_hex(&oid));
1212 }
1213
1214 if (!(o->flags & WANTED)) {
1215 o->flags |= WANTED;
1216 add_object_array(o, NULL, want_obj);
1217 }
1218
1219 return 1;
1220 }
1221
1222 return 0;
1223 }
1224
1225 static int parse_want_ref(struct packet_writer *writer, const char *line,
1226 struct string_list *wanted_refs,
1227 struct object_array *want_obj)
1228 {
1229 const char *arg;
1230 if (skip_prefix(line, "want-ref ", &arg)) {
1231 struct object_id oid;
1232 struct string_list_item *item;
1233 struct object *o;
1234
1235 if (read_ref(arg, &oid)) {
1236 packet_writer_error(writer, "unknown ref %s", arg);
1237 die("unknown ref %s", arg);
1238 }
1239
1240 item = string_list_append(wanted_refs, arg);
1241 item->util = oiddup(&oid);
1242
1243 o = parse_object_or_die(&oid, arg);
1244 if (!(o->flags & WANTED)) {
1245 o->flags |= WANTED;
1246 add_object_array(o, NULL, want_obj);
1247 }
1248
1249 return 1;
1250 }
1251
1252 return 0;
1253 }
1254
1255 static int parse_have(const char *line, struct oid_array *haves)
1256 {
1257 const char *arg;
1258 if (skip_prefix(line, "have ", &arg)) {
1259 struct object_id oid;
1260
1261 if (get_oid_hex(arg, &oid))
1262 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1263 oid_array_append(haves, &oid);
1264 return 1;
1265 }
1266
1267 return 0;
1268 }
1269
1270 static void process_args(struct packet_reader *request,
1271 struct upload_pack_data *data)
1272 {
1273 while (packet_reader_read(request) == PACKET_READ_NORMAL) {
1274 const char *arg = request->line;
1275 const char *p;
1276
1277 /* process want */
1278 if (parse_want(&data->writer, arg, &data->want_obj))
1279 continue;
1280 if (data->allow_ref_in_want &&
1281 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1282 &data->want_obj))
1283 continue;
1284 /* process have line */
1285 if (parse_have(arg, &data->haves))
1286 continue;
1287
1288 /* process args like thin-pack */
1289 if (!strcmp(arg, "thin-pack")) {
1290 data->use_thin_pack = 1;
1291 continue;
1292 }
1293 if (!strcmp(arg, "ofs-delta")) {
1294 data->use_ofs_delta = 1;
1295 continue;
1296 }
1297 if (!strcmp(arg, "no-progress")) {
1298 data->no_progress = 1;
1299 continue;
1300 }
1301 if (!strcmp(arg, "include-tag")) {
1302 data->use_include_tag = 1;
1303 continue;
1304 }
1305 if (!strcmp(arg, "done")) {
1306 data->done = 1;
1307 continue;
1308 }
1309
1310 /* Shallow related arguments */
1311 if (process_shallow(arg, &data->shallows))
1312 continue;
1313 if (process_deepen(arg, &data->depth))
1314 continue;
1315 if (process_deepen_since(arg, &data->deepen_since,
1316 &data->deepen_rev_list))
1317 continue;
1318 if (process_deepen_not(arg, &data->deepen_not,
1319 &data->deepen_rev_list))
1320 continue;
1321 if (!strcmp(arg, "deepen-relative")) {
1322 data->deepen_relative = 1;
1323 continue;
1324 }
1325
1326 if (data->allow_filter && skip_prefix(arg, "filter ", &p)) {
1327 list_objects_filter_die_if_populated(&data->filter_options);
1328 parse_list_objects_filter(&data->filter_options, p);
1329 continue;
1330 }
1331
1332 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1333 data->allow_sideband_all) &&
1334 !strcmp(arg, "sideband-all")) {
1335 data->writer.use_sideband = 1;
1336 continue;
1337 }
1338
1339 /* ignore unknown lines maybe? */
1340 die("unexpected line: '%s'", arg);
1341 }
1342
1343 if (request->status != PACKET_READ_FLUSH)
1344 die(_("expected flush after fetch arguments"));
1345 }
1346
1347 static int process_haves(struct oid_array *haves, struct oid_array *common,
1348 struct object_array *have_obj)
1349 {
1350 int i;
1351
1352 /* Process haves */
1353 for (i = 0; i < haves->nr; i++) {
1354 const struct object_id *oid = &haves->oid[i];
1355 struct object *o;
1356 int we_knew_they_have = 0;
1357
1358 if (!has_object_file(oid))
1359 continue;
1360
1361 oid_array_append(common, oid);
1362
1363 o = parse_object(the_repository, oid);
1364 if (!o)
1365 die("oops (%s)", oid_to_hex(oid));
1366 if (o->type == OBJ_COMMIT) {
1367 struct commit_list *parents;
1368 struct commit *commit = (struct commit *)o;
1369 if (o->flags & THEY_HAVE)
1370 we_knew_they_have = 1;
1371 else
1372 o->flags |= THEY_HAVE;
1373 if (!oldest_have || (commit->date < oldest_have))
1374 oldest_have = commit->date;
1375 for (parents = commit->parents;
1376 parents;
1377 parents = parents->next)
1378 parents->item->object.flags |= THEY_HAVE;
1379 }
1380 if (!we_knew_they_have)
1381 add_object_array(o, NULL, have_obj);
1382 }
1383
1384 return 0;
1385 }
1386
1387 static int send_acks(struct packet_writer *writer, struct oid_array *acks,
1388 const struct object_array *have_obj,
1389 struct object_array *want_obj)
1390 {
1391 int i;
1392
1393 packet_writer_write(writer, "acknowledgments\n");
1394
1395 /* Send Acks */
1396 if (!acks->nr)
1397 packet_writer_write(writer, "NAK\n");
1398
1399 for (i = 0; i < acks->nr; i++) {
1400 packet_writer_write(writer, "ACK %s\n",
1401 oid_to_hex(&acks->oid[i]));
1402 }
1403
1404 if (ok_to_give_up(have_obj, want_obj)) {
1405 /* Send Ready */
1406 packet_writer_write(writer, "ready\n");
1407 return 1;
1408 }
1409
1410 return 0;
1411 }
1412
1413 static int process_haves_and_send_acks(struct upload_pack_data *data)
1414 {
1415 struct oid_array common = OID_ARRAY_INIT;
1416 int ret = 0;
1417
1418 process_haves(&data->haves, &common, &data->have_obj);
1419 if (data->done) {
1420 ret = 1;
1421 } else if (send_acks(&data->writer, &common,
1422 &data->have_obj, &data->want_obj)) {
1423 packet_writer_delim(&data->writer);
1424 ret = 1;
1425 } else {
1426 /* Add Flush */
1427 packet_writer_flush(&data->writer);
1428 ret = 0;
1429 }
1430
1431 oid_array_clear(&data->haves);
1432 oid_array_clear(&common);
1433 return ret;
1434 }
1435
1436 static void send_wanted_ref_info(struct upload_pack_data *data)
1437 {
1438 const struct string_list_item *item;
1439
1440 if (!data->wanted_refs.nr)
1441 return;
1442
1443 packet_writer_write(&data->writer, "wanted-refs\n");
1444
1445 for_each_string_list_item(item, &data->wanted_refs) {
1446 packet_writer_write(&data->writer, "%s %s\n",
1447 oid_to_hex(item->util),
1448 item->string);
1449 }
1450
1451 packet_writer_delim(&data->writer);
1452 }
1453
1454 static void send_shallow_info(struct upload_pack_data *data)
1455 {
1456 /* No shallow info needs to be sent */
1457 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1458 !is_repository_shallow(the_repository))
1459 return;
1460
1461 packet_writer_write(&data->writer, "shallow-info\n");
1462
1463 if (!send_shallow_list(data) &&
1464 is_repository_shallow(the_repository))
1465 deepen(data, INFINITE_DEPTH);
1466
1467 packet_delim(1);
1468 }
1469
1470 enum fetch_state {
1471 FETCH_PROCESS_ARGS = 0,
1472 FETCH_SEND_ACKS,
1473 FETCH_SEND_PACK,
1474 FETCH_DONE,
1475 };
1476
1477 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1478 struct packet_reader *request)
1479 {
1480 enum fetch_state state = FETCH_PROCESS_ARGS;
1481 struct upload_pack_data data;
1482
1483 clear_object_flags(ALL_FLAGS);
1484
1485 upload_pack_data_init(&data);
1486 data.use_sideband = LARGE_PACKET_MAX;
1487
1488 git_config(upload_pack_config, &data);
1489
1490 while (state != FETCH_DONE) {
1491 switch (state) {
1492 case FETCH_PROCESS_ARGS:
1493 process_args(request, &data);
1494
1495 if (!data.want_obj.nr) {
1496 /*
1497 * Request didn't contain any 'want' lines,
1498 * guess they didn't want anything.
1499 */
1500 state = FETCH_DONE;
1501 } else if (data.haves.nr) {
1502 /*
1503 * Request had 'have' lines, so lets ACK them.
1504 */
1505 state = FETCH_SEND_ACKS;
1506 } else {
1507 /*
1508 * Request had 'want's but no 'have's so we can
1509 * immedietly go to construct and send a pack.
1510 */
1511 state = FETCH_SEND_PACK;
1512 }
1513 break;
1514 case FETCH_SEND_ACKS:
1515 if (process_haves_and_send_acks(&data))
1516 state = FETCH_SEND_PACK;
1517 else
1518 state = FETCH_DONE;
1519 break;
1520 case FETCH_SEND_PACK:
1521 send_wanted_ref_info(&data);
1522 send_shallow_info(&data);
1523
1524 packet_writer_write(&data.writer, "packfile\n");
1525 create_pack_file(&data);
1526 state = FETCH_DONE;
1527 break;
1528 case FETCH_DONE:
1529 continue;
1530 }
1531 }
1532
1533 upload_pack_data_clear(&data);
1534 return 0;
1535 }
1536
1537 int upload_pack_advertise(struct repository *r,
1538 struct strbuf *value)
1539 {
1540 if (value) {
1541 int allow_filter_value;
1542 int allow_ref_in_want;
1543 int allow_sideband_all_value;
1544
1545 strbuf_addstr(value, "shallow");
1546
1547 if (!repo_config_get_bool(the_repository,
1548 "uploadpack.allowfilter",
1549 &allow_filter_value) &&
1550 allow_filter_value)
1551 strbuf_addstr(value, " filter");
1552
1553 if (!repo_config_get_bool(the_repository,
1554 "uploadpack.allowrefinwant",
1555 &allow_ref_in_want) &&
1556 allow_ref_in_want)
1557 strbuf_addstr(value, " ref-in-want");
1558
1559 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1560 (!repo_config_get_bool(the_repository,
1561 "uploadpack.allowsidebandall",
1562 &allow_sideband_all_value) &&
1563 allow_sideband_all_value))
1564 strbuf_addstr(value, " sideband-all");
1565 }
1566
1567 return 1;
1568 }
Unnamed repository; edit this file 'description' to name the repository.