Merge branch 'es/doc-worktree-guessremote-config'
[git.git] / upload-pack.c
blob5e81f1ff24f141fc5357522cb0745c7ff0aeb189
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"
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)
36 #define SHALLOW (1u << 16)
37 #define NOT_SHALLOW (1u << 17)
38 #define CLIENT_SHALLOW (1u << 18)
39 #define HIDDEN_REF (1u << 19)
41 #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \
42 NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF)
44 static timestamp_t oldest_have;
46 static int deepen_relative;
47 static int multi_ack;
48 static int no_done;
49 static int use_thin_pack, use_ofs_delta, use_include_tag;
50 static int no_progress, daemon_mode;
51 /* Allow specifying sha1 if it is a ref tip. */
52 #define ALLOW_TIP_SHA1 01
53 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
54 #define ALLOW_REACHABLE_SHA1 02
55 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
56 #define ALLOW_ANY_SHA1 07
57 static unsigned int allow_unadvertised_object_request;
58 static int shallow_nr;
59 static struct object_array extra_edge_obj;
60 static unsigned int timeout;
61 static int keepalive = 5;
62 /* 0 for no sideband,
63 * otherwise maximum packet size (up to 65520 bytes).
65 static int use_sideband;
66 static int stateless_rpc;
67 static const char *pack_objects_hook;
69 static int filter_capability_requested;
70 static int allow_filter;
71 static int allow_ref_in_want;
72 static struct list_objects_filter_options filter_options;
74 static void reset_timeout(void)
76 alarm(timeout);
79 static void send_client_data(int fd, const char *data, ssize_t sz)
81 if (use_sideband) {
82 send_sideband(1, fd, data, sz, use_sideband);
83 return;
85 if (fd == 3)
86 /* emergency quit */
87 fd = 2;
88 if (fd == 2) {
89 /* XXX: are we happy to lose stuff here? */
90 xwrite(fd, data, sz);
91 return;
93 write_or_die(fd, data, sz);
96 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
98 FILE *fp = cb_data;
99 if (graft->nr_parent == -1)
100 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
101 return 0;
104 static void create_pack_file(const struct object_array *have_obj,
105 const struct object_array *want_obj)
107 struct child_process pack_objects = CHILD_PROCESS_INIT;
108 char data[8193], progress[128];
109 char abort_msg[] = "aborting due to possible repository "
110 "corruption on the remote side.";
111 int buffered = -1;
112 ssize_t sz;
113 int i;
114 FILE *pipe_fd;
116 if (!pack_objects_hook)
117 pack_objects.git_cmd = 1;
118 else {
119 argv_array_push(&pack_objects.args, pack_objects_hook);
120 argv_array_push(&pack_objects.args, "git");
121 pack_objects.use_shell = 1;
124 if (shallow_nr) {
125 argv_array_push(&pack_objects.args, "--shallow-file");
126 argv_array_push(&pack_objects.args, "");
128 argv_array_push(&pack_objects.args, "pack-objects");
129 argv_array_push(&pack_objects.args, "--revs");
130 if (use_thin_pack)
131 argv_array_push(&pack_objects.args, "--thin");
133 argv_array_push(&pack_objects.args, "--stdout");
134 if (shallow_nr)
135 argv_array_push(&pack_objects.args, "--shallow");
136 if (!no_progress)
137 argv_array_push(&pack_objects.args, "--progress");
138 if (use_ofs_delta)
139 argv_array_push(&pack_objects.args, "--delta-base-offset");
140 if (use_include_tag)
141 argv_array_push(&pack_objects.args, "--include-tag");
142 if (filter_options.filter_spec) {
143 if (pack_objects.use_shell) {
144 struct strbuf buf = STRBUF_INIT;
145 sq_quote_buf(&buf, filter_options.filter_spec);
146 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
147 strbuf_release(&buf);
148 } else {
149 argv_array_pushf(&pack_objects.args, "--filter=%s",
150 filter_options.filter_spec);
154 pack_objects.in = -1;
155 pack_objects.out = -1;
156 pack_objects.err = -1;
158 if (start_command(&pack_objects))
159 die("git upload-pack: unable to fork git-pack-objects");
161 pipe_fd = xfdopen(pack_objects.in, "w");
163 if (shallow_nr)
164 for_each_commit_graft(write_one_shallow, pipe_fd);
166 for (i = 0; i < want_obj->nr; i++)
167 fprintf(pipe_fd, "%s\n",
168 oid_to_hex(&want_obj->objects[i].item->oid));
169 fprintf(pipe_fd, "--not\n");
170 for (i = 0; i < have_obj->nr; i++)
171 fprintf(pipe_fd, "%s\n",
172 oid_to_hex(&have_obj->objects[i].item->oid));
173 for (i = 0; i < extra_edge_obj.nr; i++)
174 fprintf(pipe_fd, "%s\n",
175 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
176 fprintf(pipe_fd, "\n");
177 fflush(pipe_fd);
178 fclose(pipe_fd);
180 /* We read from pack_objects.err to capture stderr output for
181 * progress bar, and pack_objects.out to capture the pack data.
184 while (1) {
185 struct pollfd pfd[2];
186 int pe, pu, pollsize;
187 int ret;
189 reset_timeout();
191 pollsize = 0;
192 pe = pu = -1;
194 if (0 <= pack_objects.out) {
195 pfd[pollsize].fd = pack_objects.out;
196 pfd[pollsize].events = POLLIN;
197 pu = pollsize;
198 pollsize++;
200 if (0 <= pack_objects.err) {
201 pfd[pollsize].fd = pack_objects.err;
202 pfd[pollsize].events = POLLIN;
203 pe = pollsize;
204 pollsize++;
207 if (!pollsize)
208 break;
210 ret = poll(pfd, pollsize,
211 keepalive < 0 ? -1 : 1000 * keepalive);
213 if (ret < 0) {
214 if (errno != EINTR) {
215 error_errno("poll failed, resuming");
216 sleep(1);
218 continue;
220 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
221 /* Status ready; we ship that in the side-band
222 * or dump to the standard error.
224 sz = xread(pack_objects.err, progress,
225 sizeof(progress));
226 if (0 < sz)
227 send_client_data(2, progress, sz);
228 else if (sz == 0) {
229 close(pack_objects.err);
230 pack_objects.err = -1;
232 else
233 goto fail;
234 /* give priority to status messages */
235 continue;
237 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
238 /* Data ready; we keep the last byte to ourselves
239 * in case we detect broken rev-list, so that we
240 * can leave the stream corrupted. This is
241 * unfortunate -- unpack-objects would happily
242 * accept a valid packdata with trailing garbage,
243 * so appending garbage after we pass all the
244 * pack data is not good enough to signal
245 * breakage to downstream.
247 char *cp = data;
248 ssize_t outsz = 0;
249 if (0 <= buffered) {
250 *cp++ = buffered;
251 outsz++;
253 sz = xread(pack_objects.out, cp,
254 sizeof(data) - outsz);
255 if (0 < sz)
257 else if (sz == 0) {
258 close(pack_objects.out);
259 pack_objects.out = -1;
261 else
262 goto fail;
263 sz += outsz;
264 if (1 < sz) {
265 buffered = data[sz-1] & 0xFF;
266 sz--;
268 else
269 buffered = -1;
270 send_client_data(1, data, sz);
274 * We hit the keepalive timeout without saying anything; send
275 * an empty message on the data sideband just to let the other
276 * side know we're still working on it, but don't have any data
277 * yet.
279 * If we don't have a sideband channel, there's no room in the
280 * protocol to say anything, so those clients are just out of
281 * luck.
283 if (!ret && use_sideband) {
284 static const char buf[] = "0005\1";
285 write_or_die(1, buf, 5);
289 if (finish_command(&pack_objects)) {
290 error("git upload-pack: git-pack-objects died with error.");
291 goto fail;
294 /* flush the data */
295 if (0 <= buffered) {
296 data[0] = buffered;
297 send_client_data(1, data, 1);
298 fprintf(stderr, "flushed.\n");
300 if (use_sideband)
301 packet_flush(1);
302 return;
304 fail:
305 send_client_data(3, abort_msg, sizeof(abort_msg));
306 die("git upload-pack: %s", abort_msg);
309 static int got_oid(const char *hex, struct object_id *oid,
310 struct object_array *have_obj)
312 struct object *o;
313 int we_knew_they_have = 0;
315 if (get_oid_hex(hex, oid))
316 die("git upload-pack: expected SHA1 object, got '%s'", hex);
317 if (!has_object_file(oid))
318 return -1;
320 o = parse_object(the_repository, oid);
321 if (!o)
322 die("oops (%s)", oid_to_hex(oid));
323 if (o->type == OBJ_COMMIT) {
324 struct commit_list *parents;
325 struct commit *commit = (struct commit *)o;
326 if (o->flags & THEY_HAVE)
327 we_knew_they_have = 1;
328 else
329 o->flags |= THEY_HAVE;
330 if (!oldest_have || (commit->date < oldest_have))
331 oldest_have = commit->date;
332 for (parents = commit->parents;
333 parents;
334 parents = parents->next)
335 parents->item->object.flags |= THEY_HAVE;
337 if (!we_knew_they_have) {
338 add_object_array(o, NULL, have_obj);
339 return 1;
341 return 0;
344 static int ok_to_give_up(const struct object_array *have_obj,
345 struct object_array *want_obj)
347 uint32_t min_generation = GENERATION_NUMBER_ZERO;
349 if (!have_obj->nr)
350 return 0;
352 return can_all_from_reach_with_flag(want_obj, THEY_HAVE,
353 COMMON_KNOWN, oldest_have,
354 min_generation);
357 static int get_common_commits(struct object_array *have_obj,
358 struct object_array *want_obj)
360 struct object_id oid;
361 char last_hex[GIT_MAX_HEXSZ + 1];
362 int got_common = 0;
363 int got_other = 0;
364 int sent_ready = 0;
366 save_commit_buffer = 0;
368 for (;;) {
369 char *line = packet_read_line(0, NULL);
370 const char *arg;
372 reset_timeout();
374 if (!line) {
375 if (multi_ack == 2 && got_common
376 && !got_other && ok_to_give_up(have_obj, want_obj)) {
377 sent_ready = 1;
378 packet_write_fmt(1, "ACK %s ready\n", last_hex);
380 if (have_obj->nr == 0 || multi_ack)
381 packet_write_fmt(1, "NAK\n");
383 if (no_done && sent_ready) {
384 packet_write_fmt(1, "ACK %s\n", last_hex);
385 return 0;
387 if (stateless_rpc)
388 exit(0);
389 got_common = 0;
390 got_other = 0;
391 continue;
393 if (skip_prefix(line, "have ", &arg)) {
394 switch (got_oid(arg, &oid, have_obj)) {
395 case -1: /* they have what we do not */
396 got_other = 1;
397 if (multi_ack && ok_to_give_up(have_obj, want_obj)) {
398 const char *hex = oid_to_hex(&oid);
399 if (multi_ack == 2) {
400 sent_ready = 1;
401 packet_write_fmt(1, "ACK %s ready\n", hex);
402 } else
403 packet_write_fmt(1, "ACK %s continue\n", hex);
405 break;
406 default:
407 got_common = 1;
408 oid_to_hex_r(last_hex, &oid);
409 if (multi_ack == 2)
410 packet_write_fmt(1, "ACK %s common\n", last_hex);
411 else if (multi_ack)
412 packet_write_fmt(1, "ACK %s continue\n", last_hex);
413 else if (have_obj->nr == 1)
414 packet_write_fmt(1, "ACK %s\n", last_hex);
415 break;
417 continue;
419 if (!strcmp(line, "done")) {
420 if (have_obj->nr > 0) {
421 if (multi_ack)
422 packet_write_fmt(1, "ACK %s\n", last_hex);
423 return 0;
425 packet_write_fmt(1, "NAK\n");
426 return -1;
428 die("git upload-pack: expected SHA1 list, got '%s'", line);
432 static int is_our_ref(struct object *o)
434 int allow_hidden_ref = (allow_unadvertised_object_request &
435 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
436 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
440 * on successful case, it's up to the caller to close cmd->out
442 static int do_reachable_revlist(struct child_process *cmd,
443 struct object_array *src,
444 struct object_array *reachable)
446 static const char *argv[] = {
447 "rev-list", "--stdin", NULL,
449 struct object *o;
450 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
451 int i;
452 const unsigned hexsz = the_hash_algo->hexsz;
454 cmd->argv = argv;
455 cmd->git_cmd = 1;
456 cmd->no_stderr = 1;
457 cmd->in = -1;
458 cmd->out = -1;
461 * If the next rev-list --stdin encounters an unknown commit,
462 * it terminates, which will cause SIGPIPE in the write loop
463 * below.
465 sigchain_push(SIGPIPE, SIG_IGN);
467 if (start_command(cmd))
468 goto error;
470 namebuf[0] = '^';
471 namebuf[hexsz + 1] = '\n';
472 for (i = get_max_object_index(); 0 < i; ) {
473 o = get_indexed_object(--i);
474 if (!o)
475 continue;
476 if (reachable && o->type == OBJ_COMMIT)
477 o->flags &= ~TMP_MARK;
478 if (!is_our_ref(o))
479 continue;
480 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
481 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
482 goto error;
484 namebuf[hexsz] = '\n';
485 for (i = 0; i < src->nr; i++) {
486 o = src->objects[i].item;
487 if (is_our_ref(o)) {
488 if (reachable)
489 add_object_array(o, NULL, reachable);
490 continue;
492 if (reachable && o->type == OBJ_COMMIT)
493 o->flags |= TMP_MARK;
494 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
495 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
496 goto error;
498 close(cmd->in);
499 cmd->in = -1;
500 sigchain_pop(SIGPIPE);
502 return 0;
504 error:
505 sigchain_pop(SIGPIPE);
507 if (cmd->in >= 0)
508 close(cmd->in);
509 if (cmd->out >= 0)
510 close(cmd->out);
511 return -1;
514 static int get_reachable_list(struct object_array *src,
515 struct object_array *reachable)
517 struct child_process cmd = CHILD_PROCESS_INIT;
518 int i;
519 struct object *o;
520 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
521 const unsigned hexsz = the_hash_algo->hexsz;
523 if (do_reachable_revlist(&cmd, src, reachable) < 0)
524 return -1;
526 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
527 struct object_id sha1;
528 const char *p;
530 if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
531 break;
533 o = lookup_object(the_repository, sha1.hash);
534 if (o && o->type == OBJ_COMMIT) {
535 o->flags &= ~TMP_MARK;
538 for (i = get_max_object_index(); 0 < i; i--) {
539 o = get_indexed_object(i - 1);
540 if (o && o->type == OBJ_COMMIT &&
541 (o->flags & TMP_MARK)) {
542 add_object_array(o, NULL, reachable);
543 o->flags &= ~TMP_MARK;
546 close(cmd.out);
548 if (finish_command(&cmd))
549 return -1;
551 return 0;
554 static int has_unreachable(struct object_array *src)
556 struct child_process cmd = CHILD_PROCESS_INIT;
557 char buf[1];
558 int i;
560 if (do_reachable_revlist(&cmd, src, NULL) < 0)
561 return 1;
564 * The commits out of the rev-list are not ancestors of
565 * our ref.
567 i = read_in_full(cmd.out, buf, 1);
568 if (i)
569 goto error;
570 close(cmd.out);
571 cmd.out = -1;
574 * rev-list may have died by encountering a bad commit
575 * in the history, in which case we do want to bail out
576 * even when it showed no commit.
578 if (finish_command(&cmd))
579 goto error;
581 /* All the non-tip ones are ancestors of what we advertised */
582 return 0;
584 error:
585 sigchain_pop(SIGPIPE);
586 if (cmd.out >= 0)
587 close(cmd.out);
588 return 1;
591 static void check_non_tip(struct object_array *want_obj)
593 int i;
596 * In the normal in-process case without
597 * uploadpack.allowReachableSHA1InWant,
598 * non-tip requests can never happen.
600 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
601 goto error;
602 if (!has_unreachable(want_obj))
603 /* All the non-tip ones are ancestors of what we advertised */
604 return;
606 error:
607 /* Pick one of them (we know there at least is one) */
608 for (i = 0; i < want_obj->nr; i++) {
609 struct object *o = want_obj->objects[i].item;
610 if (!is_our_ref(o))
611 die("git upload-pack: not our ref %s",
612 oid_to_hex(&o->oid));
616 static void send_shallow(struct commit_list *result)
618 while (result) {
619 struct object *object = &result->item->object;
620 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
621 packet_write_fmt(1, "shallow %s",
622 oid_to_hex(&object->oid));
623 register_shallow(the_repository, &object->oid);
624 shallow_nr++;
626 result = result->next;
630 static void send_unshallow(const struct object_array *shallows,
631 struct object_array *want_obj)
633 int i;
635 for (i = 0; i < shallows->nr; i++) {
636 struct object *object = shallows->objects[i].item;
637 if (object->flags & NOT_SHALLOW) {
638 struct commit_list *parents;
639 packet_write_fmt(1, "unshallow %s",
640 oid_to_hex(&object->oid));
641 object->flags &= ~CLIENT_SHALLOW;
643 * We want to _register_ "object" as shallow, but we
644 * also need to traverse object's parents to deepen a
645 * shallow clone. Unregister it for now so we can
646 * parse and add the parents to the want list, then
647 * re-register it.
649 unregister_shallow(&object->oid);
650 object->parsed = 0;
651 parse_commit_or_die((struct commit *)object);
652 parents = ((struct commit *)object)->parents;
653 while (parents) {
654 add_object_array(&parents->item->object,
655 NULL, want_obj);
656 parents = parents->next;
658 add_object_array(object, NULL, &extra_edge_obj);
660 /* make sure commit traversal conforms to client */
661 register_shallow(the_repository, &object->oid);
665 static void deepen(int depth, int deepen_relative,
666 struct object_array *shallows, struct object_array *want_obj)
668 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
669 int i;
671 for (i = 0; i < shallows->nr; i++) {
672 struct object *object = shallows->objects[i].item;
673 object->flags |= NOT_SHALLOW;
675 } else if (deepen_relative) {
676 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
677 struct commit_list *result;
679 get_reachable_list(shallows, &reachable_shallows);
680 result = get_shallow_commits(&reachable_shallows,
681 depth + 1,
682 SHALLOW, NOT_SHALLOW);
683 send_shallow(result);
684 free_commit_list(result);
685 object_array_clear(&reachable_shallows);
686 } else {
687 struct commit_list *result;
689 result = get_shallow_commits(want_obj, depth,
690 SHALLOW, NOT_SHALLOW);
691 send_shallow(result);
692 free_commit_list(result);
695 send_unshallow(shallows, want_obj);
698 static void deepen_by_rev_list(int ac, const char **av,
699 struct object_array *shallows,
700 struct object_array *want_obj)
702 struct commit_list *result;
704 close_commit_graph(the_repository);
705 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
706 send_shallow(result);
707 free_commit_list(result);
708 send_unshallow(shallows, want_obj);
711 /* Returns 1 if a shallow list is sent or 0 otherwise */
712 static int send_shallow_list(int depth, int deepen_rev_list,
713 timestamp_t deepen_since,
714 struct string_list *deepen_not,
715 struct object_array *shallows,
716 struct object_array *want_obj)
718 int ret = 0;
720 if (depth > 0 && deepen_rev_list)
721 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
722 if (depth > 0) {
723 deepen(depth, deepen_relative, shallows, want_obj);
724 ret = 1;
725 } else if (deepen_rev_list) {
726 struct argv_array av = ARGV_ARRAY_INIT;
727 int i;
729 argv_array_push(&av, "rev-list");
730 if (deepen_since)
731 argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
732 if (deepen_not->nr) {
733 argv_array_push(&av, "--not");
734 for (i = 0; i < deepen_not->nr; i++) {
735 struct string_list_item *s = deepen_not->items + i;
736 argv_array_push(&av, s->string);
738 argv_array_push(&av, "--not");
740 for (i = 0; i < want_obj->nr; i++) {
741 struct object *o = want_obj->objects[i].item;
742 argv_array_push(&av, oid_to_hex(&o->oid));
744 deepen_by_rev_list(av.argc, av.argv, shallows, want_obj);
745 argv_array_clear(&av);
746 ret = 1;
747 } else {
748 if (shallows->nr > 0) {
749 int i;
750 for (i = 0; i < shallows->nr; i++)
751 register_shallow(the_repository,
752 &shallows->objects[i].item->oid);
756 shallow_nr += shallows->nr;
757 return ret;
760 static int process_shallow(const char *line, struct object_array *shallows)
762 const char *arg;
763 if (skip_prefix(line, "shallow ", &arg)) {
764 struct object_id oid;
765 struct object *object;
766 if (get_oid_hex(arg, &oid))
767 die("invalid shallow line: %s", line);
768 object = parse_object(the_repository, &oid);
769 if (!object)
770 return 1;
771 if (object->type != OBJ_COMMIT)
772 die("invalid shallow object %s", oid_to_hex(&oid));
773 if (!(object->flags & CLIENT_SHALLOW)) {
774 object->flags |= CLIENT_SHALLOW;
775 add_object_array(object, NULL, shallows);
777 return 1;
780 return 0;
783 static int process_deepen(const char *line, int *depth)
785 const char *arg;
786 if (skip_prefix(line, "deepen ", &arg)) {
787 char *end = NULL;
788 *depth = (int)strtol(arg, &end, 0);
789 if (!end || *end || *depth <= 0)
790 die("Invalid deepen: %s", line);
791 return 1;
794 return 0;
797 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
799 const char *arg;
800 if (skip_prefix(line, "deepen-since ", &arg)) {
801 char *end = NULL;
802 *deepen_since = parse_timestamp(arg, &end, 0);
803 if (!end || *end || !deepen_since ||
804 /* revisions.c's max_age -1 is special */
805 *deepen_since == -1)
806 die("Invalid deepen-since: %s", line);
807 *deepen_rev_list = 1;
808 return 1;
810 return 0;
813 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
815 const char *arg;
816 if (skip_prefix(line, "deepen-not ", &arg)) {
817 char *ref = NULL;
818 struct object_id oid;
819 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
820 die("git upload-pack: ambiguous deepen-not: %s", line);
821 string_list_append(deepen_not, ref);
822 free(ref);
823 *deepen_rev_list = 1;
824 return 1;
826 return 0;
829 static void receive_needs(struct object_array *want_obj)
831 struct object_array shallows = OBJECT_ARRAY_INIT;
832 struct string_list deepen_not = STRING_LIST_INIT_DUP;
833 int depth = 0;
834 int has_non_tip = 0;
835 timestamp_t deepen_since = 0;
836 int deepen_rev_list = 0;
838 shallow_nr = 0;
839 for (;;) {
840 struct object *o;
841 const char *features;
842 struct object_id oid_buf;
843 char *line = packet_read_line(0, NULL);
844 const char *arg;
846 reset_timeout();
847 if (!line)
848 break;
850 if (process_shallow(line, &shallows))
851 continue;
852 if (process_deepen(line, &depth))
853 continue;
854 if (process_deepen_since(line, &deepen_since, &deepen_rev_list))
855 continue;
856 if (process_deepen_not(line, &deepen_not, &deepen_rev_list))
857 continue;
859 if (skip_prefix(line, "filter ", &arg)) {
860 if (!filter_capability_requested)
861 die("git upload-pack: filtering capability not negotiated");
862 parse_list_objects_filter(&filter_options, arg);
863 continue;
866 if (!skip_prefix(line, "want ", &arg) ||
867 parse_oid_hex(arg, &oid_buf, &features))
868 die("git upload-pack: protocol error, "
869 "expected to get object ID, not '%s'", line);
871 if (parse_feature_request(features, "deepen-relative"))
872 deepen_relative = 1;
873 if (parse_feature_request(features, "multi_ack_detailed"))
874 multi_ack = 2;
875 else if (parse_feature_request(features, "multi_ack"))
876 multi_ack = 1;
877 if (parse_feature_request(features, "no-done"))
878 no_done = 1;
879 if (parse_feature_request(features, "thin-pack"))
880 use_thin_pack = 1;
881 if (parse_feature_request(features, "ofs-delta"))
882 use_ofs_delta = 1;
883 if (parse_feature_request(features, "side-band-64k"))
884 use_sideband = LARGE_PACKET_MAX;
885 else if (parse_feature_request(features, "side-band"))
886 use_sideband = DEFAULT_PACKET_MAX;
887 if (parse_feature_request(features, "no-progress"))
888 no_progress = 1;
889 if (parse_feature_request(features, "include-tag"))
890 use_include_tag = 1;
891 if (allow_filter && parse_feature_request(features, "filter"))
892 filter_capability_requested = 1;
894 o = parse_object(the_repository, &oid_buf);
895 if (!o) {
896 packet_write_fmt(1,
897 "ERR upload-pack: not our ref %s",
898 oid_to_hex(&oid_buf));
899 die("git upload-pack: not our ref %s",
900 oid_to_hex(&oid_buf));
902 if (!(o->flags & WANTED)) {
903 o->flags |= WANTED;
904 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
905 || is_our_ref(o)))
906 has_non_tip = 1;
907 add_object_array(o, NULL, want_obj);
912 * We have sent all our refs already, and the other end
913 * should have chosen out of them. When we are operating
914 * in the stateless RPC mode, however, their choice may
915 * have been based on the set of older refs advertised
916 * by another process that handled the initial request.
918 if (has_non_tip)
919 check_non_tip(want_obj);
921 if (!use_sideband && daemon_mode)
922 no_progress = 1;
924 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
925 return;
927 if (send_shallow_list(depth, deepen_rev_list, deepen_since,
928 &deepen_not, &shallows, want_obj))
929 packet_flush(1);
930 object_array_clear(&shallows);
933 /* return non-zero if the ref is hidden, otherwise 0 */
934 static int mark_our_ref(const char *refname, const char *refname_full,
935 const struct object_id *oid)
937 struct object *o = lookup_unknown_object(oid->hash);
939 if (ref_is_hidden(refname, refname_full)) {
940 o->flags |= HIDDEN_REF;
941 return 1;
943 o->flags |= OUR_REF;
944 return 0;
947 static int check_ref(const char *refname_full, const struct object_id *oid,
948 int flag, void *cb_data)
950 const char *refname = strip_namespace(refname_full);
952 mark_our_ref(refname, refname_full, oid);
953 return 0;
956 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
958 struct string_list_item *item;
960 if (!symref->nr)
961 return;
962 for_each_string_list_item(item, symref)
963 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
966 static int send_ref(const char *refname, const struct object_id *oid,
967 int flag, void *cb_data)
969 static const char *capabilities = "multi_ack thin-pack side-band"
970 " side-band-64k ofs-delta shallow deepen-since deepen-not"
971 " deepen-relative no-progress include-tag multi_ack_detailed";
972 const char *refname_nons = strip_namespace(refname);
973 struct object_id peeled;
975 if (mark_our_ref(refname_nons, refname, oid))
976 return 0;
978 if (capabilities) {
979 struct strbuf symref_info = STRBUF_INIT;
981 format_symref_info(&symref_info, cb_data);
982 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
983 oid_to_hex(oid), refname_nons,
984 0, capabilities,
985 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
986 " allow-tip-sha1-in-want" : "",
987 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
988 " allow-reachable-sha1-in-want" : "",
989 stateless_rpc ? " no-done" : "",
990 symref_info.buf,
991 allow_filter ? " filter" : "",
992 git_user_agent_sanitized());
993 strbuf_release(&symref_info);
994 } else {
995 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
997 capabilities = NULL;
998 if (!peel_ref(refname, &peeled))
999 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1000 return 0;
1003 static int find_symref(const char *refname, const struct object_id *oid,
1004 int flag, void *cb_data)
1006 const char *symref_target;
1007 struct string_list_item *item;
1009 if ((flag & REF_ISSYMREF) == 0)
1010 return 0;
1011 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1012 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1013 die("'%s' is a symref but it is not?", refname);
1014 item = string_list_append(cb_data, refname);
1015 item->util = xstrdup(symref_target);
1016 return 0;
1019 static int upload_pack_config(const char *var, const char *value, void *unused)
1021 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1022 if (git_config_bool(var, value))
1023 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1024 else
1025 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1026 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1027 if (git_config_bool(var, value))
1028 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1029 else
1030 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1031 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1032 if (git_config_bool(var, value))
1033 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1034 else
1035 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1036 } else if (!strcmp("uploadpack.keepalive", var)) {
1037 keepalive = git_config_int(var, value);
1038 if (!keepalive)
1039 keepalive = -1;
1040 } else if (!strcmp("uploadpack.allowfilter", var)) {
1041 allow_filter = git_config_bool(var, value);
1042 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1043 allow_ref_in_want = git_config_bool(var, value);
1046 if (current_config_scope() != CONFIG_SCOPE_REPO) {
1047 if (!strcmp("uploadpack.packobjectshook", var))
1048 return git_config_string(&pack_objects_hook, var, value);
1051 return parse_hide_refs_config(var, value, "uploadpack");
1054 void upload_pack(struct upload_pack_options *options)
1056 struct string_list symref = STRING_LIST_INIT_DUP;
1057 struct object_array want_obj = OBJECT_ARRAY_INIT;
1059 stateless_rpc = options->stateless_rpc;
1060 timeout = options->timeout;
1061 daemon_mode = options->daemon_mode;
1063 git_config(upload_pack_config, NULL);
1065 head_ref_namespaced(find_symref, &symref);
1067 if (options->advertise_refs || !stateless_rpc) {
1068 reset_timeout();
1069 head_ref_namespaced(send_ref, &symref);
1070 for_each_namespaced_ref(send_ref, &symref);
1071 advertise_shallow_grafts(1);
1072 packet_flush(1);
1073 } else {
1074 head_ref_namespaced(check_ref, NULL);
1075 for_each_namespaced_ref(check_ref, NULL);
1077 string_list_clear(&symref, 1);
1078 if (options->advertise_refs)
1079 return;
1081 receive_needs(&want_obj);
1082 if (want_obj.nr) {
1083 struct object_array have_obj = OBJECT_ARRAY_INIT;
1084 get_common_commits(&have_obj, &want_obj);
1085 create_pack_file(&have_obj, &want_obj);
1089 struct upload_pack_data {
1090 struct object_array wants;
1091 struct string_list wanted_refs;
1092 struct oid_array haves;
1094 struct object_array shallows;
1095 struct string_list deepen_not;
1096 int depth;
1097 timestamp_t deepen_since;
1098 int deepen_rev_list;
1099 int deepen_relative;
1101 unsigned stateless_rpc : 1;
1103 unsigned use_thin_pack : 1;
1104 unsigned use_ofs_delta : 1;
1105 unsigned no_progress : 1;
1106 unsigned use_include_tag : 1;
1107 unsigned done : 1;
1110 static void upload_pack_data_init(struct upload_pack_data *data)
1112 struct object_array wants = OBJECT_ARRAY_INIT;
1113 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
1114 struct oid_array haves = OID_ARRAY_INIT;
1115 struct object_array shallows = OBJECT_ARRAY_INIT;
1116 struct string_list deepen_not = STRING_LIST_INIT_DUP;
1118 memset(data, 0, sizeof(*data));
1119 data->wants = wants;
1120 data->wanted_refs = wanted_refs;
1121 data->haves = haves;
1122 data->shallows = shallows;
1123 data->deepen_not = deepen_not;
1126 static void upload_pack_data_clear(struct upload_pack_data *data)
1128 object_array_clear(&data->wants);
1129 string_list_clear(&data->wanted_refs, 1);
1130 oid_array_clear(&data->haves);
1131 object_array_clear(&data->shallows);
1132 string_list_clear(&data->deepen_not, 0);
1135 static int parse_want(const char *line, struct object_array *want_obj)
1137 const char *arg;
1138 if (skip_prefix(line, "want ", &arg)) {
1139 struct object_id oid;
1140 struct object *o;
1142 if (get_oid_hex(arg, &oid))
1143 die("git upload-pack: protocol error, "
1144 "expected to get oid, not '%s'", line);
1146 o = parse_object(the_repository, &oid);
1147 if (!o) {
1148 packet_write_fmt(1,
1149 "ERR upload-pack: not our ref %s",
1150 oid_to_hex(&oid));
1151 die("git upload-pack: not our ref %s",
1152 oid_to_hex(&oid));
1155 if (!(o->flags & WANTED)) {
1156 o->flags |= WANTED;
1157 add_object_array(o, NULL, want_obj);
1160 return 1;
1163 return 0;
1166 static int parse_want_ref(const char *line, struct string_list *wanted_refs,
1167 struct object_array *want_obj)
1169 const char *arg;
1170 if (skip_prefix(line, "want-ref ", &arg)) {
1171 struct object_id oid;
1172 struct string_list_item *item;
1173 struct object *o;
1175 if (read_ref(arg, &oid)) {
1176 packet_write_fmt(1, "ERR unknown ref %s", arg);
1177 die("unknown ref %s", arg);
1180 item = string_list_append(wanted_refs, arg);
1181 item->util = oiddup(&oid);
1183 o = parse_object_or_die(&oid, arg);
1184 if (!(o->flags & WANTED)) {
1185 o->flags |= WANTED;
1186 add_object_array(o, NULL, want_obj);
1189 return 1;
1192 return 0;
1195 static int parse_have(const char *line, struct oid_array *haves)
1197 const char *arg;
1198 if (skip_prefix(line, "have ", &arg)) {
1199 struct object_id oid;
1201 if (get_oid_hex(arg, &oid))
1202 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1203 oid_array_append(haves, &oid);
1204 return 1;
1207 return 0;
1210 static void process_args(struct packet_reader *request,
1211 struct upload_pack_data *data,
1212 struct object_array *want_obj)
1214 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1215 const char *arg = request->line;
1216 const char *p;
1218 /* process want */
1219 if (parse_want(arg, want_obj))
1220 continue;
1221 if (allow_ref_in_want &&
1222 parse_want_ref(arg, &data->wanted_refs, want_obj))
1223 continue;
1224 /* process have line */
1225 if (parse_have(arg, &data->haves))
1226 continue;
1228 /* process args like thin-pack */
1229 if (!strcmp(arg, "thin-pack")) {
1230 use_thin_pack = 1;
1231 continue;
1233 if (!strcmp(arg, "ofs-delta")) {
1234 use_ofs_delta = 1;
1235 continue;
1237 if (!strcmp(arg, "no-progress")) {
1238 no_progress = 1;
1239 continue;
1241 if (!strcmp(arg, "include-tag")) {
1242 use_include_tag = 1;
1243 continue;
1245 if (!strcmp(arg, "done")) {
1246 data->done = 1;
1247 continue;
1250 /* Shallow related arguments */
1251 if (process_shallow(arg, &data->shallows))
1252 continue;
1253 if (process_deepen(arg, &data->depth))
1254 continue;
1255 if (process_deepen_since(arg, &data->deepen_since,
1256 &data->deepen_rev_list))
1257 continue;
1258 if (process_deepen_not(arg, &data->deepen_not,
1259 &data->deepen_rev_list))
1260 continue;
1261 if (!strcmp(arg, "deepen-relative")) {
1262 data->deepen_relative = 1;
1263 continue;
1266 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1267 parse_list_objects_filter(&filter_options, p);
1268 continue;
1271 /* ignore unknown lines maybe? */
1272 die("unexpected line: '%s'", arg);
1276 static int process_haves(struct oid_array *haves, struct oid_array *common,
1277 struct object_array *have_obj)
1279 int i;
1281 /* Process haves */
1282 for (i = 0; i < haves->nr; i++) {
1283 const struct object_id *oid = &haves->oid[i];
1284 struct object *o;
1285 int we_knew_they_have = 0;
1287 if (!has_object_file(oid))
1288 continue;
1290 oid_array_append(common, oid);
1292 o = parse_object(the_repository, oid);
1293 if (!o)
1294 die("oops (%s)", oid_to_hex(oid));
1295 if (o->type == OBJ_COMMIT) {
1296 struct commit_list *parents;
1297 struct commit *commit = (struct commit *)o;
1298 if (o->flags & THEY_HAVE)
1299 we_knew_they_have = 1;
1300 else
1301 o->flags |= THEY_HAVE;
1302 if (!oldest_have || (commit->date < oldest_have))
1303 oldest_have = commit->date;
1304 for (parents = commit->parents;
1305 parents;
1306 parents = parents->next)
1307 parents->item->object.flags |= THEY_HAVE;
1309 if (!we_knew_they_have)
1310 add_object_array(o, NULL, have_obj);
1313 return 0;
1316 static int send_acks(struct oid_array *acks, struct strbuf *response,
1317 const struct object_array *have_obj,
1318 struct object_array *want_obj)
1320 int i;
1322 packet_buf_write(response, "acknowledgments\n");
1324 /* Send Acks */
1325 if (!acks->nr)
1326 packet_buf_write(response, "NAK\n");
1328 for (i = 0; i < acks->nr; i++) {
1329 packet_buf_write(response, "ACK %s\n",
1330 oid_to_hex(&acks->oid[i]));
1333 if (ok_to_give_up(have_obj, want_obj)) {
1334 /* Send Ready */
1335 packet_buf_write(response, "ready\n");
1336 return 1;
1339 return 0;
1342 static int process_haves_and_send_acks(struct upload_pack_data *data,
1343 struct object_array *have_obj,
1344 struct object_array *want_obj)
1346 struct oid_array common = OID_ARRAY_INIT;
1347 struct strbuf response = STRBUF_INIT;
1348 int ret = 0;
1350 process_haves(&data->haves, &common, have_obj);
1351 if (data->done) {
1352 ret = 1;
1353 } else if (send_acks(&common, &response, have_obj, want_obj)) {
1354 packet_buf_delim(&response);
1355 ret = 1;
1356 } else {
1357 /* Add Flush */
1358 packet_buf_flush(&response);
1359 ret = 0;
1362 /* Send response */
1363 write_or_die(1, response.buf, response.len);
1364 strbuf_release(&response);
1366 oid_array_clear(&data->haves);
1367 oid_array_clear(&common);
1368 return ret;
1371 static void send_wanted_ref_info(struct upload_pack_data *data)
1373 const struct string_list_item *item;
1375 if (!data->wanted_refs.nr)
1376 return;
1378 packet_write_fmt(1, "wanted-refs\n");
1380 for_each_string_list_item(item, &data->wanted_refs) {
1381 packet_write_fmt(1, "%s %s\n",
1382 oid_to_hex(item->util),
1383 item->string);
1386 packet_delim(1);
1389 static void send_shallow_info(struct upload_pack_data *data,
1390 struct object_array *want_obj)
1392 /* No shallow info needs to be sent */
1393 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1394 !is_repository_shallow(the_repository))
1395 return;
1397 packet_write_fmt(1, "shallow-info\n");
1399 if (!send_shallow_list(data->depth, data->deepen_rev_list,
1400 data->deepen_since, &data->deepen_not,
1401 &data->shallows, want_obj) &&
1402 is_repository_shallow(the_repository))
1403 deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows,
1404 want_obj);
1406 packet_delim(1);
1409 enum fetch_state {
1410 FETCH_PROCESS_ARGS = 0,
1411 FETCH_SEND_ACKS,
1412 FETCH_SEND_PACK,
1413 FETCH_DONE,
1416 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1417 struct packet_reader *request)
1419 enum fetch_state state = FETCH_PROCESS_ARGS;
1420 struct upload_pack_data data;
1421 struct object_array have_obj = OBJECT_ARRAY_INIT;
1422 struct object_array want_obj = OBJECT_ARRAY_INIT;
1424 clear_object_flags(ALL_FLAGS);
1426 git_config(upload_pack_config, NULL);
1428 upload_pack_data_init(&data);
1429 use_sideband = LARGE_PACKET_MAX;
1431 while (state != FETCH_DONE) {
1432 switch (state) {
1433 case FETCH_PROCESS_ARGS:
1434 process_args(request, &data, &want_obj);
1436 if (!want_obj.nr) {
1438 * Request didn't contain any 'want' lines,
1439 * guess they didn't want anything.
1441 state = FETCH_DONE;
1442 } else if (data.haves.nr) {
1444 * Request had 'have' lines, so lets ACK them.
1446 state = FETCH_SEND_ACKS;
1447 } else {
1449 * Request had 'want's but no 'have's so we can
1450 * immedietly go to construct and send a pack.
1452 state = FETCH_SEND_PACK;
1454 break;
1455 case FETCH_SEND_ACKS:
1456 if (process_haves_and_send_acks(&data, &have_obj,
1457 &want_obj))
1458 state = FETCH_SEND_PACK;
1459 else
1460 state = FETCH_DONE;
1461 break;
1462 case FETCH_SEND_PACK:
1463 send_wanted_ref_info(&data);
1464 send_shallow_info(&data, &want_obj);
1466 packet_write_fmt(1, "packfile\n");
1467 create_pack_file(&have_obj, &want_obj);
1468 state = FETCH_DONE;
1469 break;
1470 case FETCH_DONE:
1471 continue;
1475 upload_pack_data_clear(&data);
1476 object_array_clear(&have_obj);
1477 object_array_clear(&want_obj);
1478 return 0;
1481 int upload_pack_advertise(struct repository *r,
1482 struct strbuf *value)
1484 if (value) {
1485 int allow_filter_value;
1486 int allow_ref_in_want;
1488 strbuf_addstr(value, "shallow");
1490 if (!repo_config_get_bool(the_repository,
1491 "uploadpack.allowfilter",
1492 &allow_filter_value) &&
1493 allow_filter_value)
1494 strbuf_addstr(value, " filter");
1496 if (!repo_config_get_bool(the_repository,
1497 "uploadpack.allowrefinwant",
1498 &allow_ref_in_want) &&
1499 allow_ref_in_want)
1500 strbuf_addstr(value, " ref-in-want");
1503 return 1;