archive-zip.c: mark more strings for translation
[git.git] / upload-pack.c
blob87c6722ea58207a9b369e75f7cf7ac16a705330b
1 #include "cache.h"
2 #include "config.h"
3 #include "refs.h"
4 #include "pkt-line.h"
5 #include "sideband.h"
6 #include "tag.h"
7 #include "object.h"
8 #include "commit.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "list-objects.h"
12 #include "list-objects-filter.h"
13 #include "list-objects-filter-options.h"
14 #include "run-command.h"
15 #include "connect.h"
16 #include "sigchain.h"
17 #include "version.h"
18 #include "string-list.h"
19 #include "argv-array.h"
20 #include "prio-queue.h"
21 #include "protocol.h"
22 #include "quote.h"
23 #include "upload-pack.h"
24 #include "serve.h"
26 /* Remember to update object flag allocation in object.h */
27 #define THEY_HAVE (1u << 11)
28 #define OUR_REF (1u << 12)
29 #define WANTED (1u << 13)
30 #define COMMON_KNOWN (1u << 14)
31 #define REACHABLE (1u << 15)
33 #define SHALLOW (1u << 16)
34 #define NOT_SHALLOW (1u << 17)
35 #define CLIENT_SHALLOW (1u << 18)
36 #define HIDDEN_REF (1u << 19)
38 static timestamp_t oldest_have;
40 static int deepen_relative;
41 static int multi_ack;
42 static int no_done;
43 static int use_thin_pack, use_ofs_delta, use_include_tag;
44 static int no_progress, daemon_mode;
45 /* Allow specifying sha1 if it is a ref tip. */
46 #define ALLOW_TIP_SHA1 01
47 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
48 #define ALLOW_REACHABLE_SHA1 02
49 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
50 #define ALLOW_ANY_SHA1 07
51 static unsigned int allow_unadvertised_object_request;
52 static int shallow_nr;
53 static struct object_array have_obj;
54 static struct object_array want_obj;
55 static struct object_array extra_edge_obj;
56 static unsigned int timeout;
57 static int keepalive = 5;
58 /* 0 for no sideband,
59 * otherwise maximum packet size (up to 65520 bytes).
61 static int use_sideband;
62 static int stateless_rpc;
63 static const char *pack_objects_hook;
65 static int filter_capability_requested;
66 static int allow_filter;
67 static struct list_objects_filter_options filter_options;
69 static void reset_timeout(void)
71 alarm(timeout);
74 static void send_client_data(int fd, const char *data, ssize_t sz)
76 if (use_sideband) {
77 send_sideband(1, fd, data, sz, use_sideband);
78 return;
80 if (fd == 3)
81 /* emergency quit */
82 fd = 2;
83 if (fd == 2) {
84 /* XXX: are we happy to lose stuff here? */
85 xwrite(fd, data, sz);
86 return;
88 write_or_die(fd, data, sz);
91 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
93 FILE *fp = cb_data;
94 if (graft->nr_parent == -1)
95 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
96 return 0;
99 static void create_pack_file(void)
101 struct child_process pack_objects = CHILD_PROCESS_INIT;
102 char data[8193], progress[128];
103 char abort_msg[] = "aborting due to possible repository "
104 "corruption on the remote side.";
105 int buffered = -1;
106 ssize_t sz;
107 int i;
108 FILE *pipe_fd;
110 if (!pack_objects_hook)
111 pack_objects.git_cmd = 1;
112 else {
113 argv_array_push(&pack_objects.args, pack_objects_hook);
114 argv_array_push(&pack_objects.args, "git");
115 pack_objects.use_shell = 1;
118 if (shallow_nr) {
119 argv_array_push(&pack_objects.args, "--shallow-file");
120 argv_array_push(&pack_objects.args, "");
122 argv_array_push(&pack_objects.args, "pack-objects");
123 argv_array_push(&pack_objects.args, "--revs");
124 if (use_thin_pack)
125 argv_array_push(&pack_objects.args, "--thin");
127 argv_array_push(&pack_objects.args, "--stdout");
128 if (shallow_nr)
129 argv_array_push(&pack_objects.args, "--shallow");
130 if (!no_progress)
131 argv_array_push(&pack_objects.args, "--progress");
132 if (use_ofs_delta)
133 argv_array_push(&pack_objects.args, "--delta-base-offset");
134 if (use_include_tag)
135 argv_array_push(&pack_objects.args, "--include-tag");
136 if (filter_options.filter_spec) {
137 if (pack_objects.use_shell) {
138 struct strbuf buf = STRBUF_INIT;
139 sq_quote_buf(&buf, filter_options.filter_spec);
140 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
141 strbuf_release(&buf);
142 } else {
143 argv_array_pushf(&pack_objects.args, "--filter=%s",
144 filter_options.filter_spec);
148 pack_objects.in = -1;
149 pack_objects.out = -1;
150 pack_objects.err = -1;
152 if (start_command(&pack_objects))
153 die("git upload-pack: unable to fork git-pack-objects");
155 pipe_fd = xfdopen(pack_objects.in, "w");
157 if (shallow_nr)
158 for_each_commit_graft(write_one_shallow, pipe_fd);
160 for (i = 0; i < want_obj.nr; i++)
161 fprintf(pipe_fd, "%s\n",
162 oid_to_hex(&want_obj.objects[i].item->oid));
163 fprintf(pipe_fd, "--not\n");
164 for (i = 0; i < have_obj.nr; i++)
165 fprintf(pipe_fd, "%s\n",
166 oid_to_hex(&have_obj.objects[i].item->oid));
167 for (i = 0; i < extra_edge_obj.nr; i++)
168 fprintf(pipe_fd, "%s\n",
169 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
170 fprintf(pipe_fd, "\n");
171 fflush(pipe_fd);
172 fclose(pipe_fd);
174 /* We read from pack_objects.err to capture stderr output for
175 * progress bar, and pack_objects.out to capture the pack data.
178 while (1) {
179 struct pollfd pfd[2];
180 int pe, pu, pollsize;
181 int ret;
183 reset_timeout();
185 pollsize = 0;
186 pe = pu = -1;
188 if (0 <= pack_objects.out) {
189 pfd[pollsize].fd = pack_objects.out;
190 pfd[pollsize].events = POLLIN;
191 pu = pollsize;
192 pollsize++;
194 if (0 <= pack_objects.err) {
195 pfd[pollsize].fd = pack_objects.err;
196 pfd[pollsize].events = POLLIN;
197 pe = pollsize;
198 pollsize++;
201 if (!pollsize)
202 break;
204 ret = poll(pfd, pollsize,
205 keepalive < 0 ? -1 : 1000 * keepalive);
207 if (ret < 0) {
208 if (errno != EINTR) {
209 error_errno("poll failed, resuming");
210 sleep(1);
212 continue;
214 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
215 /* Status ready; we ship that in the side-band
216 * or dump to the standard error.
218 sz = xread(pack_objects.err, progress,
219 sizeof(progress));
220 if (0 < sz)
221 send_client_data(2, progress, sz);
222 else if (sz == 0) {
223 close(pack_objects.err);
224 pack_objects.err = -1;
226 else
227 goto fail;
228 /* give priority to status messages */
229 continue;
231 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
232 /* Data ready; we keep the last byte to ourselves
233 * in case we detect broken rev-list, so that we
234 * can leave the stream corrupted. This is
235 * unfortunate -- unpack-objects would happily
236 * accept a valid packdata with trailing garbage,
237 * so appending garbage after we pass all the
238 * pack data is not good enough to signal
239 * breakage to downstream.
241 char *cp = data;
242 ssize_t outsz = 0;
243 if (0 <= buffered) {
244 *cp++ = buffered;
245 outsz++;
247 sz = xread(pack_objects.out, cp,
248 sizeof(data) - outsz);
249 if (0 < sz)
251 else if (sz == 0) {
252 close(pack_objects.out);
253 pack_objects.out = -1;
255 else
256 goto fail;
257 sz += outsz;
258 if (1 < sz) {
259 buffered = data[sz-1] & 0xFF;
260 sz--;
262 else
263 buffered = -1;
264 send_client_data(1, data, sz);
268 * We hit the keepalive timeout without saying anything; send
269 * an empty message on the data sideband just to let the other
270 * side know we're still working on it, but don't have any data
271 * yet.
273 * If we don't have a sideband channel, there's no room in the
274 * protocol to say anything, so those clients are just out of
275 * luck.
277 if (!ret && use_sideband) {
278 static const char buf[] = "0005\1";
279 write_or_die(1, buf, 5);
283 if (finish_command(&pack_objects)) {
284 error("git upload-pack: git-pack-objects died with error.");
285 goto fail;
288 /* flush the data */
289 if (0 <= buffered) {
290 data[0] = buffered;
291 send_client_data(1, data, 1);
292 fprintf(stderr, "flushed.\n");
294 if (use_sideband)
295 packet_flush(1);
296 return;
298 fail:
299 send_client_data(3, abort_msg, sizeof(abort_msg));
300 die("git upload-pack: %s", abort_msg);
303 static int got_oid(const char *hex, struct object_id *oid)
305 struct object *o;
306 int we_knew_they_have = 0;
308 if (get_oid_hex(hex, oid))
309 die("git upload-pack: expected SHA1 object, got '%s'", hex);
310 if (!has_object_file(oid))
311 return -1;
313 o = parse_object(oid);
314 if (!o)
315 die("oops (%s)", oid_to_hex(oid));
316 if (o->type == OBJ_COMMIT) {
317 struct commit_list *parents;
318 struct commit *commit = (struct commit *)o;
319 if (o->flags & THEY_HAVE)
320 we_knew_they_have = 1;
321 else
322 o->flags |= THEY_HAVE;
323 if (!oldest_have || (commit->date < oldest_have))
324 oldest_have = commit->date;
325 for (parents = commit->parents;
326 parents;
327 parents = parents->next)
328 parents->item->object.flags |= THEY_HAVE;
330 if (!we_knew_they_have) {
331 add_object_array(o, NULL, &have_obj);
332 return 1;
334 return 0;
337 static int reachable(struct commit *want)
339 struct prio_queue work = { compare_commits_by_commit_date };
341 prio_queue_put(&work, want);
342 while (work.nr) {
343 struct commit_list *list;
344 struct commit *commit = prio_queue_get(&work);
346 if (commit->object.flags & THEY_HAVE) {
347 want->object.flags |= COMMON_KNOWN;
348 break;
350 if (!commit->object.parsed)
351 parse_object(&commit->object.oid);
352 if (commit->object.flags & REACHABLE)
353 continue;
354 commit->object.flags |= REACHABLE;
355 if (commit->date < oldest_have)
356 continue;
357 for (list = commit->parents; list; list = list->next) {
358 struct commit *parent = list->item;
359 if (!(parent->object.flags & REACHABLE))
360 prio_queue_put(&work, parent);
363 want->object.flags |= REACHABLE;
364 clear_commit_marks(want, REACHABLE);
365 clear_prio_queue(&work);
366 return (want->object.flags & COMMON_KNOWN);
369 static int ok_to_give_up(void)
371 int i;
373 if (!have_obj.nr)
374 return 0;
376 for (i = 0; i < want_obj.nr; i++) {
377 struct object *want = want_obj.objects[i].item;
379 if (want->flags & COMMON_KNOWN)
380 continue;
381 want = deref_tag(want, "a want line", 0);
382 if (!want || want->type != OBJ_COMMIT) {
383 /* no way to tell if this is reachable by
384 * looking at the ancestry chain alone, so
385 * leave a note to ourselves not to worry about
386 * this object anymore.
388 want_obj.objects[i].item->flags |= COMMON_KNOWN;
389 continue;
391 if (!reachable((struct commit *)want))
392 return 0;
394 return 1;
397 static int get_common_commits(void)
399 struct object_id oid;
400 char last_hex[GIT_MAX_HEXSZ + 1];
401 int got_common = 0;
402 int got_other = 0;
403 int sent_ready = 0;
405 save_commit_buffer = 0;
407 for (;;) {
408 char *line = packet_read_line(0, NULL);
409 const char *arg;
411 reset_timeout();
413 if (!line) {
414 if (multi_ack == 2 && got_common
415 && !got_other && ok_to_give_up()) {
416 sent_ready = 1;
417 packet_write_fmt(1, "ACK %s ready\n", last_hex);
419 if (have_obj.nr == 0 || multi_ack)
420 packet_write_fmt(1, "NAK\n");
422 if (no_done && sent_ready) {
423 packet_write_fmt(1, "ACK %s\n", last_hex);
424 return 0;
426 if (stateless_rpc)
427 exit(0);
428 got_common = 0;
429 got_other = 0;
430 continue;
432 if (skip_prefix(line, "have ", &arg)) {
433 switch (got_oid(arg, &oid)) {
434 case -1: /* they have what we do not */
435 got_other = 1;
436 if (multi_ack && ok_to_give_up()) {
437 const char *hex = oid_to_hex(&oid);
438 if (multi_ack == 2) {
439 sent_ready = 1;
440 packet_write_fmt(1, "ACK %s ready\n", hex);
441 } else
442 packet_write_fmt(1, "ACK %s continue\n", hex);
444 break;
445 default:
446 got_common = 1;
447 oid_to_hex_r(last_hex, &oid);
448 if (multi_ack == 2)
449 packet_write_fmt(1, "ACK %s common\n", last_hex);
450 else if (multi_ack)
451 packet_write_fmt(1, "ACK %s continue\n", last_hex);
452 else if (have_obj.nr == 1)
453 packet_write_fmt(1, "ACK %s\n", last_hex);
454 break;
456 continue;
458 if (!strcmp(line, "done")) {
459 if (have_obj.nr > 0) {
460 if (multi_ack)
461 packet_write_fmt(1, "ACK %s\n", last_hex);
462 return 0;
464 packet_write_fmt(1, "NAK\n");
465 return -1;
467 die("git upload-pack: expected SHA1 list, got '%s'", line);
471 static int is_our_ref(struct object *o)
473 int allow_hidden_ref = (allow_unadvertised_object_request &
474 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
475 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
479 * on successful case, it's up to the caller to close cmd->out
481 static int do_reachable_revlist(struct child_process *cmd,
482 struct object_array *src,
483 struct object_array *reachable)
485 static const char *argv[] = {
486 "rev-list", "--stdin", NULL,
488 struct object *o;
489 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
490 int i;
492 cmd->argv = argv;
493 cmd->git_cmd = 1;
494 cmd->no_stderr = 1;
495 cmd->in = -1;
496 cmd->out = -1;
499 * If the next rev-list --stdin encounters an unknown commit,
500 * it terminates, which will cause SIGPIPE in the write loop
501 * below.
503 sigchain_push(SIGPIPE, SIG_IGN);
505 if (start_command(cmd))
506 goto error;
508 namebuf[0] = '^';
509 namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
510 for (i = get_max_object_index(); 0 < i; ) {
511 o = get_indexed_object(--i);
512 if (!o)
513 continue;
514 if (reachable && o->type == OBJ_COMMIT)
515 o->flags &= ~TMP_MARK;
516 if (!is_our_ref(o))
517 continue;
518 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
519 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
520 goto error;
522 namebuf[GIT_SHA1_HEXSZ] = '\n';
523 for (i = 0; i < src->nr; i++) {
524 o = src->objects[i].item;
525 if (is_our_ref(o)) {
526 if (reachable)
527 add_object_array(o, NULL, reachable);
528 continue;
530 if (reachable && o->type == OBJ_COMMIT)
531 o->flags |= TMP_MARK;
532 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
533 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
534 goto error;
536 close(cmd->in);
537 cmd->in = -1;
538 sigchain_pop(SIGPIPE);
540 return 0;
542 error:
543 sigchain_pop(SIGPIPE);
545 if (cmd->in >= 0)
546 close(cmd->in);
547 if (cmd->out >= 0)
548 close(cmd->out);
549 return -1;
552 static int get_reachable_list(struct object_array *src,
553 struct object_array *reachable)
555 struct child_process cmd = CHILD_PROCESS_INIT;
556 int i;
557 struct object *o;
558 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
559 const unsigned hexsz = the_hash_algo->hexsz;
561 if (do_reachable_revlist(&cmd, src, reachable) < 0)
562 return -1;
564 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
565 struct object_id sha1;
566 const char *p;
568 if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
569 break;
571 o = lookup_object(sha1.hash);
572 if (o && o->type == OBJ_COMMIT) {
573 o->flags &= ~TMP_MARK;
576 for (i = get_max_object_index(); 0 < i; i--) {
577 o = get_indexed_object(i - 1);
578 if (o && o->type == OBJ_COMMIT &&
579 (o->flags & TMP_MARK)) {
580 add_object_array(o, NULL, reachable);
581 o->flags &= ~TMP_MARK;
584 close(cmd.out);
586 if (finish_command(&cmd))
587 return -1;
589 return 0;
592 static int has_unreachable(struct object_array *src)
594 struct child_process cmd = CHILD_PROCESS_INIT;
595 char buf[1];
596 int i;
598 if (do_reachable_revlist(&cmd, src, NULL) < 0)
599 return 1;
602 * The commits out of the rev-list are not ancestors of
603 * our ref.
605 i = read_in_full(cmd.out, buf, 1);
606 if (i)
607 goto error;
608 close(cmd.out);
609 cmd.out = -1;
612 * rev-list may have died by encountering a bad commit
613 * in the history, in which case we do want to bail out
614 * even when it showed no commit.
616 if (finish_command(&cmd))
617 goto error;
619 /* All the non-tip ones are ancestors of what we advertised */
620 return 0;
622 error:
623 sigchain_pop(SIGPIPE);
624 if (cmd.out >= 0)
625 close(cmd.out);
626 return 1;
629 static void check_non_tip(void)
631 int i;
634 * In the normal in-process case without
635 * uploadpack.allowReachableSHA1InWant,
636 * non-tip requests can never happen.
638 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
639 goto error;
640 if (!has_unreachable(&want_obj))
641 /* All the non-tip ones are ancestors of what we advertised */
642 return;
644 error:
645 /* Pick one of them (we know there at least is one) */
646 for (i = 0; i < want_obj.nr; i++) {
647 struct object *o = want_obj.objects[i].item;
648 if (!is_our_ref(o))
649 die("git upload-pack: not our ref %s",
650 oid_to_hex(&o->oid));
654 static void send_shallow(struct commit_list *result)
656 while (result) {
657 struct object *object = &result->item->object;
658 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
659 packet_write_fmt(1, "shallow %s",
660 oid_to_hex(&object->oid));
661 register_shallow(&object->oid);
662 shallow_nr++;
664 result = result->next;
668 static void send_unshallow(const struct object_array *shallows)
670 int i;
672 for (i = 0; i < shallows->nr; i++) {
673 struct object *object = shallows->objects[i].item;
674 if (object->flags & NOT_SHALLOW) {
675 struct commit_list *parents;
676 packet_write_fmt(1, "unshallow %s",
677 oid_to_hex(&object->oid));
678 object->flags &= ~CLIENT_SHALLOW;
680 * We want to _register_ "object" as shallow, but we
681 * also need to traverse object's parents to deepen a
682 * shallow clone. Unregister it for now so we can
683 * parse and add the parents to the want list, then
684 * re-register it.
686 unregister_shallow(&object->oid);
687 object->parsed = 0;
688 parse_commit_or_die((struct commit *)object);
689 parents = ((struct commit *)object)->parents;
690 while (parents) {
691 add_object_array(&parents->item->object,
692 NULL, &want_obj);
693 parents = parents->next;
695 add_object_array(object, NULL, &extra_edge_obj);
697 /* make sure commit traversal conforms to client */
698 register_shallow(&object->oid);
702 static void deepen(int depth, int deepen_relative,
703 struct object_array *shallows)
705 if (depth == INFINITE_DEPTH && !is_repository_shallow()) {
706 int i;
708 for (i = 0; i < shallows->nr; i++) {
709 struct object *object = shallows->objects[i].item;
710 object->flags |= NOT_SHALLOW;
712 } else if (deepen_relative) {
713 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
714 struct commit_list *result;
716 get_reachable_list(shallows, &reachable_shallows);
717 result = get_shallow_commits(&reachable_shallows,
718 depth + 1,
719 SHALLOW, NOT_SHALLOW);
720 send_shallow(result);
721 free_commit_list(result);
722 object_array_clear(&reachable_shallows);
723 } else {
724 struct commit_list *result;
726 result = get_shallow_commits(&want_obj, depth,
727 SHALLOW, NOT_SHALLOW);
728 send_shallow(result);
729 free_commit_list(result);
732 send_unshallow(shallows);
735 static void deepen_by_rev_list(int ac, const char **av,
736 struct object_array *shallows)
738 struct commit_list *result;
740 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
741 send_shallow(result);
742 free_commit_list(result);
743 send_unshallow(shallows);
746 /* Returns 1 if a shallow list is sent or 0 otherwise */
747 static int send_shallow_list(int depth, int deepen_rev_list,
748 timestamp_t deepen_since,
749 struct string_list *deepen_not,
750 struct object_array *shallows)
752 int ret = 0;
754 if (depth > 0 && deepen_rev_list)
755 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
756 if (depth > 0) {
757 deepen(depth, deepen_relative, shallows);
758 ret = 1;
759 } else if (deepen_rev_list) {
760 struct argv_array av = ARGV_ARRAY_INIT;
761 int i;
763 argv_array_push(&av, "rev-list");
764 if (deepen_since)
765 argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
766 if (deepen_not->nr) {
767 argv_array_push(&av, "--not");
768 for (i = 0; i < deepen_not->nr; i++) {
769 struct string_list_item *s = deepen_not->items + i;
770 argv_array_push(&av, s->string);
772 argv_array_push(&av, "--not");
774 for (i = 0; i < want_obj.nr; i++) {
775 struct object *o = want_obj.objects[i].item;
776 argv_array_push(&av, oid_to_hex(&o->oid));
778 deepen_by_rev_list(av.argc, av.argv, shallows);
779 argv_array_clear(&av);
780 ret = 1;
781 } else {
782 if (shallows->nr > 0) {
783 int i;
784 for (i = 0; i < shallows->nr; i++)
785 register_shallow(&shallows->objects[i].item->oid);
789 shallow_nr += shallows->nr;
790 return ret;
793 static int process_shallow(const char *line, struct object_array *shallows)
795 const char *arg;
796 if (skip_prefix(line, "shallow ", &arg)) {
797 struct object_id oid;
798 struct object *object;
799 if (get_oid_hex(arg, &oid))
800 die("invalid shallow line: %s", line);
801 object = parse_object(&oid);
802 if (!object)
803 return 1;
804 if (object->type != OBJ_COMMIT)
805 die("invalid shallow object %s", oid_to_hex(&oid));
806 if (!(object->flags & CLIENT_SHALLOW)) {
807 object->flags |= CLIENT_SHALLOW;
808 add_object_array(object, NULL, shallows);
810 return 1;
813 return 0;
816 static int process_deepen(const char *line, int *depth)
818 const char *arg;
819 if (skip_prefix(line, "deepen ", &arg)) {
820 char *end = NULL;
821 *depth = (int)strtol(arg, &end, 0);
822 if (!end || *end || *depth <= 0)
823 die("Invalid deepen: %s", line);
824 return 1;
827 return 0;
830 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
832 const char *arg;
833 if (skip_prefix(line, "deepen-since ", &arg)) {
834 char *end = NULL;
835 *deepen_since = parse_timestamp(arg, &end, 0);
836 if (!end || *end || !deepen_since ||
837 /* revisions.c's max_age -1 is special */
838 *deepen_since == -1)
839 die("Invalid deepen-since: %s", line);
840 *deepen_rev_list = 1;
841 return 1;
843 return 0;
846 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
848 const char *arg;
849 if (skip_prefix(line, "deepen-not ", &arg)) {
850 char *ref = NULL;
851 struct object_id oid;
852 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
853 die("git upload-pack: ambiguous deepen-not: %s", line);
854 string_list_append(deepen_not, ref);
855 free(ref);
856 *deepen_rev_list = 1;
857 return 1;
859 return 0;
862 static void receive_needs(void)
864 struct object_array shallows = OBJECT_ARRAY_INIT;
865 struct string_list deepen_not = STRING_LIST_INIT_DUP;
866 int depth = 0;
867 int has_non_tip = 0;
868 timestamp_t deepen_since = 0;
869 int deepen_rev_list = 0;
871 shallow_nr = 0;
872 for (;;) {
873 struct object *o;
874 const char *features;
875 struct object_id oid_buf;
876 char *line = packet_read_line(0, NULL);
877 const char *arg;
879 reset_timeout();
880 if (!line)
881 break;
883 if (process_shallow(line, &shallows))
884 continue;
885 if (process_deepen(line, &depth))
886 continue;
887 if (process_deepen_since(line, &deepen_since, &deepen_rev_list))
888 continue;
889 if (process_deepen_not(line, &deepen_not, &deepen_rev_list))
890 continue;
892 if (skip_prefix(line, "filter ", &arg)) {
893 if (!filter_capability_requested)
894 die("git upload-pack: filtering capability not negotiated");
895 parse_list_objects_filter(&filter_options, arg);
896 continue;
899 if (!skip_prefix(line, "want ", &arg) ||
900 parse_oid_hex(arg, &oid_buf, &features))
901 die("git upload-pack: protocol error, "
902 "expected to get object ID, not '%s'", line);
904 if (parse_feature_request(features, "deepen-relative"))
905 deepen_relative = 1;
906 if (parse_feature_request(features, "multi_ack_detailed"))
907 multi_ack = 2;
908 else if (parse_feature_request(features, "multi_ack"))
909 multi_ack = 1;
910 if (parse_feature_request(features, "no-done"))
911 no_done = 1;
912 if (parse_feature_request(features, "thin-pack"))
913 use_thin_pack = 1;
914 if (parse_feature_request(features, "ofs-delta"))
915 use_ofs_delta = 1;
916 if (parse_feature_request(features, "side-band-64k"))
917 use_sideband = LARGE_PACKET_MAX;
918 else if (parse_feature_request(features, "side-band"))
919 use_sideband = DEFAULT_PACKET_MAX;
920 if (parse_feature_request(features, "no-progress"))
921 no_progress = 1;
922 if (parse_feature_request(features, "include-tag"))
923 use_include_tag = 1;
924 if (allow_filter && parse_feature_request(features, "filter"))
925 filter_capability_requested = 1;
927 o = parse_object(&oid_buf);
928 if (!o) {
929 packet_write_fmt(1,
930 "ERR upload-pack: not our ref %s",
931 oid_to_hex(&oid_buf));
932 die("git upload-pack: not our ref %s",
933 oid_to_hex(&oid_buf));
935 if (!(o->flags & WANTED)) {
936 o->flags |= WANTED;
937 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
938 || is_our_ref(o)))
939 has_non_tip = 1;
940 add_object_array(o, NULL, &want_obj);
945 * We have sent all our refs already, and the other end
946 * should have chosen out of them. When we are operating
947 * in the stateless RPC mode, however, their choice may
948 * have been based on the set of older refs advertised
949 * by another process that handled the initial request.
951 if (has_non_tip)
952 check_non_tip();
954 if (!use_sideband && daemon_mode)
955 no_progress = 1;
957 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
958 return;
960 if (send_shallow_list(depth, deepen_rev_list, deepen_since,
961 &deepen_not, &shallows))
962 packet_flush(1);
963 object_array_clear(&shallows);
966 /* return non-zero if the ref is hidden, otherwise 0 */
967 static int mark_our_ref(const char *refname, const char *refname_full,
968 const struct object_id *oid)
970 struct object *o = lookup_unknown_object(oid->hash);
972 if (ref_is_hidden(refname, refname_full)) {
973 o->flags |= HIDDEN_REF;
974 return 1;
976 o->flags |= OUR_REF;
977 return 0;
980 static int check_ref(const char *refname_full, const struct object_id *oid,
981 int flag, void *cb_data)
983 const char *refname = strip_namespace(refname_full);
985 mark_our_ref(refname, refname_full, oid);
986 return 0;
989 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
991 struct string_list_item *item;
993 if (!symref->nr)
994 return;
995 for_each_string_list_item(item, symref)
996 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
999 static int send_ref(const char *refname, const struct object_id *oid,
1000 int flag, void *cb_data)
1002 static const char *capabilities = "multi_ack thin-pack side-band"
1003 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1004 " deepen-relative no-progress include-tag multi_ack_detailed";
1005 const char *refname_nons = strip_namespace(refname);
1006 struct object_id peeled;
1008 if (mark_our_ref(refname_nons, refname, oid))
1009 return 0;
1011 if (capabilities) {
1012 struct strbuf symref_info = STRBUF_INIT;
1014 format_symref_info(&symref_info, cb_data);
1015 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
1016 oid_to_hex(oid), refname_nons,
1017 0, capabilities,
1018 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
1019 " allow-tip-sha1-in-want" : "",
1020 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
1021 " allow-reachable-sha1-in-want" : "",
1022 stateless_rpc ? " no-done" : "",
1023 symref_info.buf,
1024 allow_filter ? " filter" : "",
1025 git_user_agent_sanitized());
1026 strbuf_release(&symref_info);
1027 } else {
1028 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1030 capabilities = NULL;
1031 if (!peel_ref(refname, &peeled))
1032 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1033 return 0;
1036 static int find_symref(const char *refname, const struct object_id *oid,
1037 int flag, void *cb_data)
1039 const char *symref_target;
1040 struct string_list_item *item;
1042 if ((flag & REF_ISSYMREF) == 0)
1043 return 0;
1044 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1045 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1046 die("'%s' is a symref but it is not?", refname);
1047 item = string_list_append(cb_data, refname);
1048 item->util = xstrdup(symref_target);
1049 return 0;
1052 static int upload_pack_config(const char *var, const char *value, void *unused)
1054 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1055 if (git_config_bool(var, value))
1056 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1057 else
1058 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1059 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1060 if (git_config_bool(var, value))
1061 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1062 else
1063 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1064 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1065 if (git_config_bool(var, value))
1066 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1067 else
1068 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1069 } else if (!strcmp("uploadpack.keepalive", var)) {
1070 keepalive = git_config_int(var, value);
1071 if (!keepalive)
1072 keepalive = -1;
1073 } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1074 if (!strcmp("uploadpack.packobjectshook", var))
1075 return git_config_string(&pack_objects_hook, var, value);
1076 } else if (!strcmp("uploadpack.allowfilter", var)) {
1077 allow_filter = git_config_bool(var, value);
1079 return parse_hide_refs_config(var, value, "uploadpack");
1082 void upload_pack(struct upload_pack_options *options)
1084 struct string_list symref = STRING_LIST_INIT_DUP;
1086 stateless_rpc = options->stateless_rpc;
1087 timeout = options->timeout;
1088 daemon_mode = options->daemon_mode;
1090 git_config(upload_pack_config, NULL);
1092 head_ref_namespaced(find_symref, &symref);
1094 if (options->advertise_refs || !stateless_rpc) {
1095 reset_timeout();
1096 head_ref_namespaced(send_ref, &symref);
1097 for_each_namespaced_ref(send_ref, &symref);
1098 advertise_shallow_grafts(1);
1099 packet_flush(1);
1100 } else {
1101 head_ref_namespaced(check_ref, NULL);
1102 for_each_namespaced_ref(check_ref, NULL);
1104 string_list_clear(&symref, 1);
1105 if (options->advertise_refs)
1106 return;
1108 receive_needs();
1109 if (want_obj.nr) {
1110 get_common_commits();
1111 create_pack_file();
1115 struct upload_pack_data {
1116 struct object_array wants;
1117 struct oid_array haves;
1119 struct object_array shallows;
1120 struct string_list deepen_not;
1121 int depth;
1122 timestamp_t deepen_since;
1123 int deepen_rev_list;
1124 int deepen_relative;
1126 unsigned stateless_rpc : 1;
1128 unsigned use_thin_pack : 1;
1129 unsigned use_ofs_delta : 1;
1130 unsigned no_progress : 1;
1131 unsigned use_include_tag : 1;
1132 unsigned done : 1;
1135 static void upload_pack_data_init(struct upload_pack_data *data)
1137 struct object_array wants = OBJECT_ARRAY_INIT;
1138 struct oid_array haves = OID_ARRAY_INIT;
1139 struct object_array shallows = OBJECT_ARRAY_INIT;
1140 struct string_list deepen_not = STRING_LIST_INIT_DUP;
1142 memset(data, 0, sizeof(*data));
1143 data->wants = wants;
1144 data->haves = haves;
1145 data->shallows = shallows;
1146 data->deepen_not = deepen_not;
1149 static void upload_pack_data_clear(struct upload_pack_data *data)
1151 object_array_clear(&data->wants);
1152 oid_array_clear(&data->haves);
1153 object_array_clear(&data->shallows);
1154 string_list_clear(&data->deepen_not, 0);
1157 static int parse_want(const char *line)
1159 const char *arg;
1160 if (skip_prefix(line, "want ", &arg)) {
1161 struct object_id oid;
1162 struct object *o;
1164 if (get_oid_hex(arg, &oid))
1165 die("git upload-pack: protocol error, "
1166 "expected to get oid, not '%s'", line);
1168 o = parse_object(&oid);
1169 if (!o) {
1170 packet_write_fmt(1,
1171 "ERR upload-pack: not our ref %s",
1172 oid_to_hex(&oid));
1173 die("git upload-pack: not our ref %s",
1174 oid_to_hex(&oid));
1177 if (!(o->flags & WANTED)) {
1178 o->flags |= WANTED;
1179 add_object_array(o, NULL, &want_obj);
1182 return 1;
1185 return 0;
1188 static int parse_have(const char *line, struct oid_array *haves)
1190 const char *arg;
1191 if (skip_prefix(line, "have ", &arg)) {
1192 struct object_id oid;
1194 if (get_oid_hex(arg, &oid))
1195 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1196 oid_array_append(haves, &oid);
1197 return 1;
1200 return 0;
1203 static void process_args(struct packet_reader *request,
1204 struct upload_pack_data *data)
1206 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1207 const char *arg = request->line;
1208 const char *p;
1210 /* process want */
1211 if (parse_want(arg))
1212 continue;
1213 /* process have line */
1214 if (parse_have(arg, &data->haves))
1215 continue;
1217 /* process args like thin-pack */
1218 if (!strcmp(arg, "thin-pack")) {
1219 use_thin_pack = 1;
1220 continue;
1222 if (!strcmp(arg, "ofs-delta")) {
1223 use_ofs_delta = 1;
1224 continue;
1226 if (!strcmp(arg, "no-progress")) {
1227 no_progress = 1;
1228 continue;
1230 if (!strcmp(arg, "include-tag")) {
1231 use_include_tag = 1;
1232 continue;
1234 if (!strcmp(arg, "done")) {
1235 data->done = 1;
1236 continue;
1239 /* Shallow related arguments */
1240 if (process_shallow(arg, &data->shallows))
1241 continue;
1242 if (process_deepen(arg, &data->depth))
1243 continue;
1244 if (process_deepen_since(arg, &data->deepen_since,
1245 &data->deepen_rev_list))
1246 continue;
1247 if (process_deepen_not(arg, &data->deepen_not,
1248 &data->deepen_rev_list))
1249 continue;
1250 if (!strcmp(arg, "deepen-relative")) {
1251 data->deepen_relative = 1;
1252 continue;
1255 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1256 parse_list_objects_filter(&filter_options, p);
1257 continue;
1260 /* ignore unknown lines maybe? */
1261 die("unexpected line: '%s'", arg);
1265 static int process_haves(struct oid_array *haves, struct oid_array *common)
1267 int i;
1269 /* Process haves */
1270 for (i = 0; i < haves->nr; i++) {
1271 const struct object_id *oid = &haves->oid[i];
1272 struct object *o;
1273 int we_knew_they_have = 0;
1275 if (!has_object_file(oid))
1276 continue;
1278 oid_array_append(common, oid);
1280 o = parse_object(oid);
1281 if (!o)
1282 die("oops (%s)", oid_to_hex(oid));
1283 if (o->type == OBJ_COMMIT) {
1284 struct commit_list *parents;
1285 struct commit *commit = (struct commit *)o;
1286 if (o->flags & THEY_HAVE)
1287 we_knew_they_have = 1;
1288 else
1289 o->flags |= THEY_HAVE;
1290 if (!oldest_have || (commit->date < oldest_have))
1291 oldest_have = commit->date;
1292 for (parents = commit->parents;
1293 parents;
1294 parents = parents->next)
1295 parents->item->object.flags |= THEY_HAVE;
1297 if (!we_knew_they_have)
1298 add_object_array(o, NULL, &have_obj);
1301 return 0;
1304 static int send_acks(struct oid_array *acks, struct strbuf *response)
1306 int i;
1308 packet_buf_write(response, "acknowledgments\n");
1310 /* Send Acks */
1311 if (!acks->nr)
1312 packet_buf_write(response, "NAK\n");
1314 for (i = 0; i < acks->nr; i++) {
1315 packet_buf_write(response, "ACK %s\n",
1316 oid_to_hex(&acks->oid[i]));
1319 if (ok_to_give_up()) {
1320 /* Send Ready */
1321 packet_buf_write(response, "ready\n");
1322 return 1;
1325 return 0;
1328 static int process_haves_and_send_acks(struct upload_pack_data *data)
1330 struct oid_array common = OID_ARRAY_INIT;
1331 struct strbuf response = STRBUF_INIT;
1332 int ret = 0;
1334 process_haves(&data->haves, &common);
1335 if (data->done) {
1336 ret = 1;
1337 } else if (send_acks(&common, &response)) {
1338 packet_buf_delim(&response);
1339 ret = 1;
1340 } else {
1341 /* Add Flush */
1342 packet_buf_flush(&response);
1343 ret = 0;
1346 /* Send response */
1347 write_or_die(1, response.buf, response.len);
1348 strbuf_release(&response);
1350 oid_array_clear(&data->haves);
1351 oid_array_clear(&common);
1352 return ret;
1355 static void send_shallow_info(struct upload_pack_data *data)
1357 /* No shallow info needs to be sent */
1358 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1359 !is_repository_shallow())
1360 return;
1362 packet_write_fmt(1, "shallow-info\n");
1364 if (!send_shallow_list(data->depth, data->deepen_rev_list,
1365 data->deepen_since, &data->deepen_not,
1366 &data->shallows) && is_repository_shallow())
1367 deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows);
1369 packet_delim(1);
1372 enum fetch_state {
1373 FETCH_PROCESS_ARGS = 0,
1374 FETCH_SEND_ACKS,
1375 FETCH_SEND_PACK,
1376 FETCH_DONE,
1379 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1380 struct packet_reader *request)
1382 enum fetch_state state = FETCH_PROCESS_ARGS;
1383 struct upload_pack_data data;
1385 git_config(upload_pack_config, NULL);
1387 upload_pack_data_init(&data);
1388 use_sideband = LARGE_PACKET_MAX;
1390 while (state != FETCH_DONE) {
1391 switch (state) {
1392 case FETCH_PROCESS_ARGS:
1393 process_args(request, &data);
1395 if (!want_obj.nr) {
1397 * Request didn't contain any 'want' lines,
1398 * guess they didn't want anything.
1400 state = FETCH_DONE;
1401 } else if (data.haves.nr) {
1403 * Request had 'have' lines, so lets ACK them.
1405 state = FETCH_SEND_ACKS;
1406 } else {
1408 * Request had 'want's but no 'have's so we can
1409 * immedietly go to construct and send a pack.
1411 state = FETCH_SEND_PACK;
1413 break;
1414 case FETCH_SEND_ACKS:
1415 if (process_haves_and_send_acks(&data))
1416 state = FETCH_SEND_PACK;
1417 else
1418 state = FETCH_DONE;
1419 break;
1420 case FETCH_SEND_PACK:
1421 send_shallow_info(&data);
1423 packet_write_fmt(1, "packfile\n");
1424 create_pack_file();
1425 state = FETCH_DONE;
1426 break;
1427 case FETCH_DONE:
1428 continue;
1432 upload_pack_data_clear(&data);
1433 return 0;
1436 int upload_pack_advertise(struct repository *r,
1437 struct strbuf *value)
1439 if (value) {
1440 int allow_filter_value;
1441 strbuf_addstr(value, "shallow");
1442 if (!repo_config_get_bool(the_repository,
1443 "uploadpack.allowfilter",
1444 &allow_filter_value) &&
1445 allow_filter_value)
1446 strbuf_addstr(value, " filter");
1448 return 1;