Merge branch 'ds/reachable-first-parent-fix'
[git] / upload-pack.c
1 #include "cache.h"
2 #include "config.h"
3 #include "refs.h"
4 #include "pkt-line.h"
5 #include "sideband.h"
6 #include "repository.h"
7 #include "object-store.h"
8 #include "tag.h"
9 #include "object.h"
10 #include "commit.h"
11 #include "diff.h"
12 #include "revision.h"
13 #include "list-objects.h"
14 #include "list-objects-filter.h"
15 #include "list-objects-filter-options.h"
16 #include "run-command.h"
17 #include "connect.h"
18 #include "sigchain.h"
19 #include "version.h"
20 #include "string-list.h"
21 #include "argv-array.h"
22 #include "prio-queue.h"
23 #include "protocol.h"
24 #include "quote.h"
25 #include "upload-pack.h"
26 #include "serve.h"
27 #include "commit-graph.h"
28 #include "commit-reach.h"
29
30 /* Remember to update object flag allocation in object.h */
31 #define THEY_HAVE       (1u << 11)
32 #define OUR_REF         (1u << 12)
33 #define WANTED          (1u << 13)
34 #define COMMON_KNOWN    (1u << 14)
35
36 #define SHALLOW         (1u << 16)
37 #define NOT_SHALLOW     (1u << 17)
38 #define CLIENT_SHALLOW  (1u << 18)
39 #define HIDDEN_REF      (1u << 19)
40
41 static timestamp_t oldest_have;
42
43 static int deepen_relative;
44 static int multi_ack;
45 static int no_done;
46 static int use_thin_pack, use_ofs_delta, use_include_tag;
47 static int no_progress, daemon_mode;
48 /* Allow specifying sha1 if it is a ref tip. */
49 #define ALLOW_TIP_SHA1  01
50 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
51 #define ALLOW_REACHABLE_SHA1    02
52 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
53 #define ALLOW_ANY_SHA1  07
54 static unsigned int allow_unadvertised_object_request;
55 static int shallow_nr;
56 static struct object_array have_obj;
57 static struct object_array want_obj;
58 static struct object_array extra_edge_obj;
59 static unsigned int timeout;
60 static int keepalive = 5;
61 /* 0 for no sideband,
62  * otherwise maximum packet size (up to 65520 bytes).
63  */
64 static int use_sideband;
65 static int stateless_rpc;
66 static const char *pack_objects_hook;
67
68 static int filter_capability_requested;
69 static int allow_filter;
70 static int allow_ref_in_want;
71 static struct list_objects_filter_options filter_options;
72
73 static void reset_timeout(void)
74 {
75         alarm(timeout);
76 }
77
78 static void send_client_data(int fd, const char *data, ssize_t sz)
79 {
80         if (use_sideband) {
81                 send_sideband(1, fd, data, sz, use_sideband);
82                 return;
83         }
84         if (fd == 3)
85                 /* emergency quit */
86                 fd = 2;
87         if (fd == 2) {
88                 /* XXX: are we happy to lose stuff here? */
89                 xwrite(fd, data, sz);
90                 return;
91         }
92         write_or_die(fd, data, sz);
93 }
94
95 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
96 {
97         FILE *fp = cb_data;
98         if (graft->nr_parent == -1)
99                 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
100         return 0;
101 }
102
103 static void create_pack_file(void)
104 {
105         struct child_process pack_objects = CHILD_PROCESS_INIT;
106         char data[8193], progress[128];
107         char abort_msg[] = "aborting due to possible repository "
108                 "corruption on the remote side.";
109         int buffered = -1;
110         ssize_t sz;
111         int i;
112         FILE *pipe_fd;
113
114         if (!pack_objects_hook)
115                 pack_objects.git_cmd = 1;
116         else {
117                 argv_array_push(&pack_objects.args, pack_objects_hook);
118                 argv_array_push(&pack_objects.args, "git");
119                 pack_objects.use_shell = 1;
120         }
121
122         if (shallow_nr) {
123                 argv_array_push(&pack_objects.args, "--shallow-file");
124                 argv_array_push(&pack_objects.args, "");
125         }
126         argv_array_push(&pack_objects.args, "pack-objects");
127         argv_array_push(&pack_objects.args, "--revs");
128         if (use_thin_pack)
129                 argv_array_push(&pack_objects.args, "--thin");
130
131         argv_array_push(&pack_objects.args, "--stdout");
132         if (shallow_nr)
133                 argv_array_push(&pack_objects.args, "--shallow");
134         if (!no_progress)
135                 argv_array_push(&pack_objects.args, "--progress");
136         if (use_ofs_delta)
137                 argv_array_push(&pack_objects.args, "--delta-base-offset");
138         if (use_include_tag)
139                 argv_array_push(&pack_objects.args, "--include-tag");
140         if (filter_options.filter_spec) {
141                 if (pack_objects.use_shell) {
142                         struct strbuf buf = STRBUF_INIT;
143                         sq_quote_buf(&buf, filter_options.filter_spec);
144                         argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
145                         strbuf_release(&buf);
146                 } else {
147                         argv_array_pushf(&pack_objects.args, "--filter=%s",
148                                          filter_options.filter_spec);
149                 }
150         }
151
152         pack_objects.in = -1;
153         pack_objects.out = -1;
154         pack_objects.err = -1;
155
156         if (start_command(&pack_objects))
157                 die("git upload-pack: unable to fork git-pack-objects");
158
159         pipe_fd = xfdopen(pack_objects.in, "w");
160
161         if (shallow_nr)
162                 for_each_commit_graft(write_one_shallow, pipe_fd);
163
164         for (i = 0; i < want_obj.nr; i++)
165                 fprintf(pipe_fd, "%s\n",
166                         oid_to_hex(&want_obj.objects[i].item->oid));
167         fprintf(pipe_fd, "--not\n");
168         for (i = 0; i < have_obj.nr; i++)
169                 fprintf(pipe_fd, "%s\n",
170                         oid_to_hex(&have_obj.objects[i].item->oid));
171         for (i = 0; i < extra_edge_obj.nr; i++)
172                 fprintf(pipe_fd, "%s\n",
173                         oid_to_hex(&extra_edge_obj.objects[i].item->oid));
174         fprintf(pipe_fd, "\n");
175         fflush(pipe_fd);
176         fclose(pipe_fd);
177
178         /* We read from pack_objects.err to capture stderr output for
179          * progress bar, and pack_objects.out to capture the pack data.
180          */
181
182         while (1) {
183                 struct pollfd pfd[2];
184                 int pe, pu, pollsize;
185                 int ret;
186
187                 reset_timeout();
188
189                 pollsize = 0;
190                 pe = pu = -1;
191
192                 if (0 <= pack_objects.out) {
193                         pfd[pollsize].fd = pack_objects.out;
194                         pfd[pollsize].events = POLLIN;
195                         pu = pollsize;
196                         pollsize++;
197                 }
198                 if (0 <= pack_objects.err) {
199                         pfd[pollsize].fd = pack_objects.err;
200                         pfd[pollsize].events = POLLIN;
201                         pe = pollsize;
202                         pollsize++;
203                 }
204
205                 if (!pollsize)
206                         break;
207
208                 ret = poll(pfd, pollsize,
209                         keepalive < 0 ? -1 : 1000 * keepalive);
210
211                 if (ret < 0) {
212                         if (errno != EINTR) {
213                                 error_errno("poll failed, resuming");
214                                 sleep(1);
215                         }
216                         continue;
217                 }
218                 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
219                         /* Status ready; we ship that in the side-band
220                          * or dump to the standard error.
221                          */
222                         sz = xread(pack_objects.err, progress,
223                                   sizeof(progress));
224                         if (0 < sz)
225                                 send_client_data(2, progress, sz);
226                         else if (sz == 0) {
227                                 close(pack_objects.err);
228                                 pack_objects.err = -1;
229                         }
230                         else
231                                 goto fail;
232                         /* give priority to status messages */
233                         continue;
234                 }
235                 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
236                         /* Data ready; we keep the last byte to ourselves
237                          * in case we detect broken rev-list, so that we
238                          * can leave the stream corrupted.  This is
239                          * unfortunate -- unpack-objects would happily
240                          * accept a valid packdata with trailing garbage,
241                          * so appending garbage after we pass all the
242                          * pack data is not good enough to signal
243                          * breakage to downstream.
244                          */
245                         char *cp = data;
246                         ssize_t outsz = 0;
247                         if (0 <= buffered) {
248                                 *cp++ = buffered;
249                                 outsz++;
250                         }
251                         sz = xread(pack_objects.out, cp,
252                                   sizeof(data) - outsz);
253                         if (0 < sz)
254                                 ;
255                         else if (sz == 0) {
256                                 close(pack_objects.out);
257                                 pack_objects.out = -1;
258                         }
259                         else
260                                 goto fail;
261                         sz += outsz;
262                         if (1 < sz) {
263                                 buffered = data[sz-1] & 0xFF;
264                                 sz--;
265                         }
266                         else
267                                 buffered = -1;
268                         send_client_data(1, data, sz);
269                 }
270
271                 /*
272                  * We hit the keepalive timeout without saying anything; send
273                  * an empty message on the data sideband just to let the other
274                  * side know we're still working on it, but don't have any data
275                  * yet.
276                  *
277                  * If we don't have a sideband channel, there's no room in the
278                  * protocol to say anything, so those clients are just out of
279                  * luck.
280                  */
281                 if (!ret && use_sideband) {
282                         static const char buf[] = "0005\1";
283                         write_or_die(1, buf, 5);
284                 }
285         }
286
287         if (finish_command(&pack_objects)) {
288                 error("git upload-pack: git-pack-objects died with error.");
289                 goto fail;
290         }
291
292         /* flush the data */
293         if (0 <= buffered) {
294                 data[0] = buffered;
295                 send_client_data(1, data, 1);
296                 fprintf(stderr, "flushed.\n");
297         }
298         if (use_sideband)
299                 packet_flush(1);
300         return;
301
302  fail:
303         send_client_data(3, abort_msg, sizeof(abort_msg));
304         die("git upload-pack: %s", abort_msg);
305 }
306
307 static int got_oid(const char *hex, struct object_id *oid)
308 {
309         struct object *o;
310         int we_knew_they_have = 0;
311
312         if (get_oid_hex(hex, oid))
313                 die("git upload-pack: expected SHA1 object, got '%s'", hex);
314         if (!has_object_file(oid))
315                 return -1;
316
317         o = parse_object(the_repository, oid);
318         if (!o)
319                 die("oops (%s)", oid_to_hex(oid));
320         if (o->type == OBJ_COMMIT) {
321                 struct commit_list *parents;
322                 struct commit *commit = (struct commit *)o;
323                 if (o->flags & THEY_HAVE)
324                         we_knew_they_have = 1;
325                 else
326                         o->flags |= THEY_HAVE;
327                 if (!oldest_have || (commit->date < oldest_have))
328                         oldest_have = commit->date;
329                 for (parents = commit->parents;
330                      parents;
331                      parents = parents->next)
332                         parents->item->object.flags |= THEY_HAVE;
333         }
334         if (!we_knew_they_have) {
335                 add_object_array(o, NULL, &have_obj);
336                 return 1;
337         }
338         return 0;
339 }
340
341 static int ok_to_give_up(void)
342 {
343         uint32_t min_generation = GENERATION_NUMBER_ZERO;
344
345         if (!have_obj.nr)
346                 return 0;
347
348         return can_all_from_reach_with_flag(&want_obj, THEY_HAVE,
349                                             COMMON_KNOWN, oldest_have,
350                                             min_generation);
351 }
352
353 static int get_common_commits(void)
354 {
355         struct object_id oid;
356         char last_hex[GIT_MAX_HEXSZ + 1];
357         int got_common = 0;
358         int got_other = 0;
359         int sent_ready = 0;
360
361         save_commit_buffer = 0;
362
363         for (;;) {
364                 char *line = packet_read_line(0, NULL);
365                 const char *arg;
366
367                 reset_timeout();
368
369                 if (!line) {
370                         if (multi_ack == 2 && got_common
371                             && !got_other && ok_to_give_up()) {
372                                 sent_ready = 1;
373                                 packet_write_fmt(1, "ACK %s ready\n", last_hex);
374                         }
375                         if (have_obj.nr == 0 || multi_ack)
376                                 packet_write_fmt(1, "NAK\n");
377
378                         if (no_done && sent_ready) {
379                                 packet_write_fmt(1, "ACK %s\n", last_hex);
380                                 return 0;
381                         }
382                         if (stateless_rpc)
383                                 exit(0);
384                         got_common = 0;
385                         got_other = 0;
386                         continue;
387                 }
388                 if (skip_prefix(line, "have ", &arg)) {
389                         switch (got_oid(arg, &oid)) {
390                         case -1: /* they have what we do not */
391                                 got_other = 1;
392                                 if (multi_ack && ok_to_give_up()) {
393                                         const char *hex = oid_to_hex(&oid);
394                                         if (multi_ack == 2) {
395                                                 sent_ready = 1;
396                                                 packet_write_fmt(1, "ACK %s ready\n", hex);
397                                         } else
398                                                 packet_write_fmt(1, "ACK %s continue\n", hex);
399                                 }
400                                 break;
401                         default:
402                                 got_common = 1;
403                                 oid_to_hex_r(last_hex, &oid);
404                                 if (multi_ack == 2)
405                                         packet_write_fmt(1, "ACK %s common\n", last_hex);
406                                 else if (multi_ack)
407                                         packet_write_fmt(1, "ACK %s continue\n", last_hex);
408                                 else if (have_obj.nr == 1)
409                                         packet_write_fmt(1, "ACK %s\n", last_hex);
410                                 break;
411                         }
412                         continue;
413                 }
414                 if (!strcmp(line, "done")) {
415                         if (have_obj.nr > 0) {
416                                 if (multi_ack)
417                                         packet_write_fmt(1, "ACK %s\n", last_hex);
418                                 return 0;
419                         }
420                         packet_write_fmt(1, "NAK\n");
421                         return -1;
422                 }
423                 die("git upload-pack: expected SHA1 list, got '%s'", line);
424         }
425 }
426
427 static int is_our_ref(struct object *o)
428 {
429         int allow_hidden_ref = (allow_unadvertised_object_request &
430                         (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
431         return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
432 }
433
434 /*
435  * on successful case, it's up to the caller to close cmd->out
436  */
437 static int do_reachable_revlist(struct child_process *cmd,
438                                 struct object_array *src,
439                                 struct object_array *reachable)
440 {
441         static const char *argv[] = {
442                 "rev-list", "--stdin", NULL,
443         };
444         struct object *o;
445         char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
446         int i;
447         const unsigned hexsz = the_hash_algo->hexsz;
448
449         cmd->argv = argv;
450         cmd->git_cmd = 1;
451         cmd->no_stderr = 1;
452         cmd->in = -1;
453         cmd->out = -1;
454
455         /*
456          * If the next rev-list --stdin encounters an unknown commit,
457          * it terminates, which will cause SIGPIPE in the write loop
458          * below.
459          */
460         sigchain_push(SIGPIPE, SIG_IGN);
461
462         if (start_command(cmd))
463                 goto error;
464
465         namebuf[0] = '^';
466         namebuf[hexsz + 1] = '\n';
467         for (i = get_max_object_index(); 0 < i; ) {
468                 o = get_indexed_object(--i);
469                 if (!o)
470                         continue;
471                 if (reachable && o->type == OBJ_COMMIT)
472                         o->flags &= ~TMP_MARK;
473                 if (!is_our_ref(o))
474                         continue;
475                 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
476                 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
477                         goto error;
478         }
479         namebuf[hexsz] = '\n';
480         for (i = 0; i < src->nr; i++) {
481                 o = src->objects[i].item;
482                 if (is_our_ref(o)) {
483                         if (reachable)
484                                 add_object_array(o, NULL, reachable);
485                         continue;
486                 }
487                 if (reachable && o->type == OBJ_COMMIT)
488                         o->flags |= TMP_MARK;
489                 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
490                 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
491                         goto error;
492         }
493         close(cmd->in);
494         cmd->in = -1;
495         sigchain_pop(SIGPIPE);
496
497         return 0;
498
499 error:
500         sigchain_pop(SIGPIPE);
501
502         if (cmd->in >= 0)
503                 close(cmd->in);
504         if (cmd->out >= 0)
505                 close(cmd->out);
506         return -1;
507 }
508
509 static int get_reachable_list(struct object_array *src,
510                               struct object_array *reachable)
511 {
512         struct child_process cmd = CHILD_PROCESS_INIT;
513         int i;
514         struct object *o;
515         char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
516         const unsigned hexsz = the_hash_algo->hexsz;
517
518         if (do_reachable_revlist(&cmd, src, reachable) < 0)
519                 return -1;
520
521         while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
522                 struct object_id sha1;
523                 const char *p;
524
525                 if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
526                         break;
527
528                 o = lookup_object(the_repository, sha1.hash);
529                 if (o && o->type == OBJ_COMMIT) {
530                         o->flags &= ~TMP_MARK;
531                 }
532         }
533         for (i = get_max_object_index(); 0 < i; i--) {
534                 o = get_indexed_object(i - 1);
535                 if (o && o->type == OBJ_COMMIT &&
536                     (o->flags & TMP_MARK)) {
537                         add_object_array(o, NULL, reachable);
538                                 o->flags &= ~TMP_MARK;
539                 }
540         }
541         close(cmd.out);
542
543         if (finish_command(&cmd))
544                 return -1;
545
546         return 0;
547 }
548
549 static int has_unreachable(struct object_array *src)
550 {
551         struct child_process cmd = CHILD_PROCESS_INIT;
552         char buf[1];
553         int i;
554
555         if (do_reachable_revlist(&cmd, src, NULL) < 0)
556                 return 1;
557
558         /*
559          * The commits out of the rev-list are not ancestors of
560          * our ref.
561          */
562         i = read_in_full(cmd.out, buf, 1);
563         if (i)
564                 goto error;
565         close(cmd.out);
566         cmd.out = -1;
567
568         /*
569          * rev-list may have died by encountering a bad commit
570          * in the history, in which case we do want to bail out
571          * even when it showed no commit.
572          */
573         if (finish_command(&cmd))
574                 goto error;
575
576         /* All the non-tip ones are ancestors of what we advertised */
577         return 0;
578
579 error:
580         sigchain_pop(SIGPIPE);
581         if (cmd.out >= 0)
582                 close(cmd.out);
583         return 1;
584 }
585
586 static void check_non_tip(void)
587 {
588         int i;
589
590         /*
591          * In the normal in-process case without
592          * uploadpack.allowReachableSHA1InWant,
593          * non-tip requests can never happen.
594          */
595         if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
596                 goto error;
597         if (!has_unreachable(&want_obj))
598                 /* All the non-tip ones are ancestors of what we advertised */
599                 return;
600
601 error:
602         /* Pick one of them (we know there at least is one) */
603         for (i = 0; i < want_obj.nr; i++) {
604                 struct object *o = want_obj.objects[i].item;
605                 if (!is_our_ref(o))
606                         die("git upload-pack: not our ref %s",
607                             oid_to_hex(&o->oid));
608         }
609 }
610
611 static void send_shallow(struct commit_list *result)
612 {
613         while (result) {
614                 struct object *object = &result->item->object;
615                 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
616                         packet_write_fmt(1, "shallow %s",
617                                          oid_to_hex(&object->oid));
618                         register_shallow(the_repository, &object->oid);
619                         shallow_nr++;
620                 }
621                 result = result->next;
622         }
623 }
624
625 static void send_unshallow(const struct object_array *shallows)
626 {
627         int i;
628
629         for (i = 0; i < shallows->nr; i++) {
630                 struct object *object = shallows->objects[i].item;
631                 if (object->flags & NOT_SHALLOW) {
632                         struct commit_list *parents;
633                         packet_write_fmt(1, "unshallow %s",
634                                          oid_to_hex(&object->oid));
635                         object->flags &= ~CLIENT_SHALLOW;
636                         /*
637                          * We want to _register_ "object" as shallow, but we
638                          * also need to traverse object's parents to deepen a
639                          * shallow clone. Unregister it for now so we can
640                          * parse and add the parents to the want list, then
641                          * re-register it.
642                          */
643                         unregister_shallow(&object->oid);
644                         object->parsed = 0;
645                         parse_commit_or_die((struct commit *)object);
646                         parents = ((struct commit *)object)->parents;
647                         while (parents) {
648                                 add_object_array(&parents->item->object,
649                                                  NULL, &want_obj);
650                                 parents = parents->next;
651                         }
652                         add_object_array(object, NULL, &extra_edge_obj);
653                 }
654                 /* make sure commit traversal conforms to client */
655                 register_shallow(the_repository, &object->oid);
656         }
657 }
658
659 static void deepen(int depth, int deepen_relative,
660                    struct object_array *shallows)
661 {
662         if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
663                 int i;
664
665                 for (i = 0; i < shallows->nr; i++) {
666                         struct object *object = shallows->objects[i].item;
667                         object->flags |= NOT_SHALLOW;
668                 }
669         } else if (deepen_relative) {
670                 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
671                 struct commit_list *result;
672
673                 get_reachable_list(shallows, &reachable_shallows);
674                 result = get_shallow_commits(&reachable_shallows,
675                                              depth + 1,
676                                              SHALLOW, NOT_SHALLOW);
677                 send_shallow(result);
678                 free_commit_list(result);
679                 object_array_clear(&reachable_shallows);
680         } else {
681                 struct commit_list *result;
682
683                 result = get_shallow_commits(&want_obj, depth,
684                                              SHALLOW, NOT_SHALLOW);
685                 send_shallow(result);
686                 free_commit_list(result);
687         }
688
689         send_unshallow(shallows);
690 }
691
692 static void deepen_by_rev_list(int ac, const char **av,
693                                struct object_array *shallows)
694 {
695         struct commit_list *result;
696
697         close_commit_graph(the_repository);
698         result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
699         send_shallow(result);
700         free_commit_list(result);
701         send_unshallow(shallows);
702 }
703
704 /* Returns 1 if a shallow list is sent or 0 otherwise */
705 static int send_shallow_list(int depth, int deepen_rev_list,
706                              timestamp_t deepen_since,
707                              struct string_list *deepen_not,
708                              struct object_array *shallows)
709 {
710         int ret = 0;
711
712         if (depth > 0 && deepen_rev_list)
713                 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
714         if (depth > 0) {
715                 deepen(depth, deepen_relative, shallows);
716                 ret = 1;
717         } else if (deepen_rev_list) {
718                 struct argv_array av = ARGV_ARRAY_INIT;
719                 int i;
720
721                 argv_array_push(&av, "rev-list");
722                 if (deepen_since)
723                         argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
724                 if (deepen_not->nr) {
725                         argv_array_push(&av, "--not");
726                         for (i = 0; i < deepen_not->nr; i++) {
727                                 struct string_list_item *s = deepen_not->items + i;
728                                 argv_array_push(&av, s->string);
729                         }
730                         argv_array_push(&av, "--not");
731                 }
732                 for (i = 0; i < want_obj.nr; i++) {
733                         struct object *o = want_obj.objects[i].item;
734                         argv_array_push(&av, oid_to_hex(&o->oid));
735                 }
736                 deepen_by_rev_list(av.argc, av.argv, shallows);
737                 argv_array_clear(&av);
738                 ret = 1;
739         } else {
740                 if (shallows->nr > 0) {
741                         int i;
742                         for (i = 0; i < shallows->nr; i++)
743                                 register_shallow(the_repository,
744                                                  &shallows->objects[i].item->oid);
745                 }
746         }
747
748         shallow_nr += shallows->nr;
749         return ret;
750 }
751
752 static int process_shallow(const char *line, struct object_array *shallows)
753 {
754         const char *arg;
755         if (skip_prefix(line, "shallow ", &arg)) {
756                 struct object_id oid;
757                 struct object *object;
758                 if (get_oid_hex(arg, &oid))
759                         die("invalid shallow line: %s", line);
760                 object = parse_object(the_repository, &oid);
761                 if (!object)
762                         return 1;
763                 if (object->type != OBJ_COMMIT)
764                         die("invalid shallow object %s", oid_to_hex(&oid));
765                 if (!(object->flags & CLIENT_SHALLOW)) {
766                         object->flags |= CLIENT_SHALLOW;
767                         add_object_array(object, NULL, shallows);
768                 }
769                 return 1;
770         }
771
772         return 0;
773 }
774
775 static int process_deepen(const char *line, int *depth)
776 {
777         const char *arg;
778         if (skip_prefix(line, "deepen ", &arg)) {
779                 char *end = NULL;
780                 *depth = (int)strtol(arg, &end, 0);
781                 if (!end || *end || *depth <= 0)
782                         die("Invalid deepen: %s", line);
783                 return 1;
784         }
785
786         return 0;
787 }
788
789 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
790 {
791         const char *arg;
792         if (skip_prefix(line, "deepen-since ", &arg)) {
793                 char *end = NULL;
794                 *deepen_since = parse_timestamp(arg, &end, 0);
795                 if (!end || *end || !deepen_since ||
796                     /* revisions.c's max_age -1 is special */
797                     *deepen_since == -1)
798                         die("Invalid deepen-since: %s", line);
799                 *deepen_rev_list = 1;
800                 return 1;
801         }
802         return 0;
803 }
804
805 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
806 {
807         const char *arg;
808         if (skip_prefix(line, "deepen-not ", &arg)) {
809                 char *ref = NULL;
810                 struct object_id oid;
811                 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
812                         die("git upload-pack: ambiguous deepen-not: %s", line);
813                 string_list_append(deepen_not, ref);
814                 free(ref);
815                 *deepen_rev_list = 1;
816                 return 1;
817         }
818         return 0;
819 }
820
821 static void receive_needs(void)
822 {
823         struct object_array shallows = OBJECT_ARRAY_INIT;
824         struct string_list deepen_not = STRING_LIST_INIT_DUP;
825         int depth = 0;
826         int has_non_tip = 0;
827         timestamp_t deepen_since = 0;
828         int deepen_rev_list = 0;
829
830         shallow_nr = 0;
831         for (;;) {
832                 struct object *o;
833                 const char *features;
834                 struct object_id oid_buf;
835                 char *line = packet_read_line(0, NULL);
836                 const char *arg;
837
838                 reset_timeout();
839                 if (!line)
840                         break;
841
842                 if (process_shallow(line, &shallows))
843                         continue;
844                 if (process_deepen(line, &depth))
845                         continue;
846                 if (process_deepen_since(line, &deepen_since, &deepen_rev_list))
847                         continue;
848                 if (process_deepen_not(line, &deepen_not, &deepen_rev_list))
849                         continue;
850
851                 if (skip_prefix(line, "filter ", &arg)) {
852                         if (!filter_capability_requested)
853                                 die("git upload-pack: filtering capability not negotiated");
854                         parse_list_objects_filter(&filter_options, arg);
855                         continue;
856                 }
857
858                 if (!skip_prefix(line, "want ", &arg) ||
859                     parse_oid_hex(arg, &oid_buf, &features))
860                         die("git upload-pack: protocol error, "
861                             "expected to get object ID, not '%s'", line);
862
863                 if (parse_feature_request(features, "deepen-relative"))
864                         deepen_relative = 1;
865                 if (parse_feature_request(features, "multi_ack_detailed"))
866                         multi_ack = 2;
867                 else if (parse_feature_request(features, "multi_ack"))
868                         multi_ack = 1;
869                 if (parse_feature_request(features, "no-done"))
870                         no_done = 1;
871                 if (parse_feature_request(features, "thin-pack"))
872                         use_thin_pack = 1;
873                 if (parse_feature_request(features, "ofs-delta"))
874                         use_ofs_delta = 1;
875                 if (parse_feature_request(features, "side-band-64k"))
876                         use_sideband = LARGE_PACKET_MAX;
877                 else if (parse_feature_request(features, "side-band"))
878                         use_sideband = DEFAULT_PACKET_MAX;
879                 if (parse_feature_request(features, "no-progress"))
880                         no_progress = 1;
881                 if (parse_feature_request(features, "include-tag"))
882                         use_include_tag = 1;
883                 if (allow_filter && parse_feature_request(features, "filter"))
884                         filter_capability_requested = 1;
885
886                 o = parse_object(the_repository, &oid_buf);
887                 if (!o) {
888                         packet_write_fmt(1,
889                                          "ERR upload-pack: not our ref %s",
890                                          oid_to_hex(&oid_buf));
891                         die("git upload-pack: not our ref %s",
892                             oid_to_hex(&oid_buf));
893                 }
894                 if (!(o->flags & WANTED)) {
895                         o->flags |= WANTED;
896                         if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
897                               || is_our_ref(o)))
898                                 has_non_tip = 1;
899                         add_object_array(o, NULL, &want_obj);
900                 }
901         }
902
903         /*
904          * We have sent all our refs already, and the other end
905          * should have chosen out of them. When we are operating
906          * in the stateless RPC mode, however, their choice may
907          * have been based on the set of older refs advertised
908          * by another process that handled the initial request.
909          */
910         if (has_non_tip)
911                 check_non_tip();
912
913         if (!use_sideband && daemon_mode)
914                 no_progress = 1;
915
916         if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
917                 return;
918
919         if (send_shallow_list(depth, deepen_rev_list, deepen_since,
920                               &deepen_not, &shallows))
921                 packet_flush(1);
922         object_array_clear(&shallows);
923 }
924
925 /* return non-zero if the ref is hidden, otherwise 0 */
926 static int mark_our_ref(const char *refname, const char *refname_full,
927                         const struct object_id *oid)
928 {
929         struct object *o = lookup_unknown_object(oid->hash);
930
931         if (ref_is_hidden(refname, refname_full)) {
932                 o->flags |= HIDDEN_REF;
933                 return 1;
934         }
935         o->flags |= OUR_REF;
936         return 0;
937 }
938
939 static int check_ref(const char *refname_full, const struct object_id *oid,
940                      int flag, void *cb_data)
941 {
942         const char *refname = strip_namespace(refname_full);
943
944         mark_our_ref(refname, refname_full, oid);
945         return 0;
946 }
947
948 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
949 {
950         struct string_list_item *item;
951
952         if (!symref->nr)
953                 return;
954         for_each_string_list_item(item, symref)
955                 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
956 }
957
958 static int send_ref(const char *refname, const struct object_id *oid,
959                     int flag, void *cb_data)
960 {
961         static const char *capabilities = "multi_ack thin-pack side-band"
962                 " side-band-64k ofs-delta shallow deepen-since deepen-not"
963                 " deepen-relative no-progress include-tag multi_ack_detailed";
964         const char *refname_nons = strip_namespace(refname);
965         struct object_id peeled;
966
967         if (mark_our_ref(refname_nons, refname, oid))
968                 return 0;
969
970         if (capabilities) {
971                 struct strbuf symref_info = STRBUF_INIT;
972
973                 format_symref_info(&symref_info, cb_data);
974                 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
975                              oid_to_hex(oid), refname_nons,
976                              0, capabilities,
977                              (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
978                                      " allow-tip-sha1-in-want" : "",
979                              (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
980                                      " allow-reachable-sha1-in-want" : "",
981                              stateless_rpc ? " no-done" : "",
982                              symref_info.buf,
983                              allow_filter ? " filter" : "",
984                              git_user_agent_sanitized());
985                 strbuf_release(&symref_info);
986         } else {
987                 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
988         }
989         capabilities = NULL;
990         if (!peel_ref(refname, &peeled))
991                 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
992         return 0;
993 }
994
995 static int find_symref(const char *refname, const struct object_id *oid,
996                        int flag, void *cb_data)
997 {
998         const char *symref_target;
999         struct string_list_item *item;
1000
1001         if ((flag & REF_ISSYMREF) == 0)
1002                 return 0;
1003         symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1004         if (!symref_target || (flag & REF_ISSYMREF) == 0)
1005                 die("'%s' is a symref but it is not?", refname);
1006         item = string_list_append(cb_data, refname);
1007         item->util = xstrdup(symref_target);
1008         return 0;
1009 }
1010
1011 static int upload_pack_config(const char *var, const char *value, void *unused)
1012 {
1013         if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1014                 if (git_config_bool(var, value))
1015                         allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1016                 else
1017                         allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1018         } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1019                 if (git_config_bool(var, value))
1020                         allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1021                 else
1022                         allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1023         } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1024                 if (git_config_bool(var, value))
1025                         allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1026                 else
1027                         allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1028         } else if (!strcmp("uploadpack.keepalive", var)) {
1029                 keepalive = git_config_int(var, value);
1030                 if (!keepalive)
1031                         keepalive = -1;
1032         } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1033                 if (!strcmp("uploadpack.packobjectshook", var))
1034                         return git_config_string(&pack_objects_hook, var, value);
1035         } else if (!strcmp("uploadpack.allowfilter", var)) {
1036                 allow_filter = git_config_bool(var, value);
1037         } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1038                 allow_ref_in_want = git_config_bool(var, value);
1039         }
1040         return parse_hide_refs_config(var, value, "uploadpack");
1041 }
1042
1043 void upload_pack(struct upload_pack_options *options)
1044 {
1045         struct string_list symref = STRING_LIST_INIT_DUP;
1046
1047         stateless_rpc = options->stateless_rpc;
1048         timeout = options->timeout;
1049         daemon_mode = options->daemon_mode;
1050
1051         git_config(upload_pack_config, NULL);
1052
1053         head_ref_namespaced(find_symref, &symref);
1054
1055         if (options->advertise_refs || !stateless_rpc) {
1056                 reset_timeout();
1057                 head_ref_namespaced(send_ref, &symref);
1058                 for_each_namespaced_ref(send_ref, &symref);
1059                 advertise_shallow_grafts(1);
1060                 packet_flush(1);
1061         } else {
1062                 head_ref_namespaced(check_ref, NULL);
1063                 for_each_namespaced_ref(check_ref, NULL);
1064         }
1065         string_list_clear(&symref, 1);
1066         if (options->advertise_refs)
1067                 return;
1068
1069         receive_needs();
1070         if (want_obj.nr) {
1071                 get_common_commits();
1072                 create_pack_file();
1073         }
1074 }
1075
1076 struct upload_pack_data {
1077         struct object_array wants;
1078         struct string_list wanted_refs;
1079         struct oid_array haves;
1080
1081         struct object_array shallows;
1082         struct string_list deepen_not;
1083         int depth;
1084         timestamp_t deepen_since;
1085         int deepen_rev_list;
1086         int deepen_relative;
1087
1088         unsigned stateless_rpc : 1;
1089
1090         unsigned use_thin_pack : 1;
1091         unsigned use_ofs_delta : 1;
1092         unsigned no_progress : 1;
1093         unsigned use_include_tag : 1;
1094         unsigned done : 1;
1095 };
1096
1097 static void upload_pack_data_init(struct upload_pack_data *data)
1098 {
1099         struct object_array wants = OBJECT_ARRAY_INIT;
1100         struct string_list wanted_refs = STRING_LIST_INIT_DUP;
1101         struct oid_array haves = OID_ARRAY_INIT;
1102         struct object_array shallows = OBJECT_ARRAY_INIT;
1103         struct string_list deepen_not = STRING_LIST_INIT_DUP;
1104
1105         memset(data, 0, sizeof(*data));
1106         data->wants = wants;
1107         data->wanted_refs = wanted_refs;
1108         data->haves = haves;
1109         data->shallows = shallows;
1110         data->deepen_not = deepen_not;
1111 }
1112
1113 static void upload_pack_data_clear(struct upload_pack_data *data)
1114 {
1115         object_array_clear(&data->wants);
1116         string_list_clear(&data->wanted_refs, 1);
1117         oid_array_clear(&data->haves);
1118         object_array_clear(&data->shallows);
1119         string_list_clear(&data->deepen_not, 0);
1120 }
1121
1122 static int parse_want(const char *line)
1123 {
1124         const char *arg;
1125         if (skip_prefix(line, "want ", &arg)) {
1126                 struct object_id oid;
1127                 struct object *o;
1128
1129                 if (get_oid_hex(arg, &oid))
1130                         die("git upload-pack: protocol error, "
1131                             "expected to get oid, not '%s'", line);
1132
1133                 o = parse_object(the_repository, &oid);
1134                 if (!o) {
1135                         packet_write_fmt(1,
1136                                          "ERR upload-pack: not our ref %s",
1137                                          oid_to_hex(&oid));
1138                         die("git upload-pack: not our ref %s",
1139                             oid_to_hex(&oid));
1140                 }
1141
1142                 if (!(o->flags & WANTED)) {
1143                         o->flags |= WANTED;
1144                         add_object_array(o, NULL, &want_obj);
1145                 }
1146
1147                 return 1;
1148         }
1149
1150         return 0;
1151 }
1152
1153 static int parse_want_ref(const char *line, struct string_list *wanted_refs)
1154 {
1155         const char *arg;
1156         if (skip_prefix(line, "want-ref ", &arg)) {
1157                 struct object_id oid;
1158                 struct string_list_item *item;
1159                 struct object *o;
1160
1161                 if (read_ref(arg, &oid)) {
1162                         packet_write_fmt(1, "ERR unknown ref %s", arg);
1163                         die("unknown ref %s", arg);
1164                 }
1165
1166                 item = string_list_append(wanted_refs, arg);
1167                 item->util = oiddup(&oid);
1168
1169                 o = parse_object_or_die(&oid, arg);
1170                 if (!(o->flags & WANTED)) {
1171                         o->flags |= WANTED;
1172                         add_object_array(o, NULL, &want_obj);
1173                 }
1174
1175                 return 1;
1176         }
1177
1178         return 0;
1179 }
1180
1181 static int parse_have(const char *line, struct oid_array *haves)
1182 {
1183         const char *arg;
1184         if (skip_prefix(line, "have ", &arg)) {
1185                 struct object_id oid;
1186
1187                 if (get_oid_hex(arg, &oid))
1188                         die("git upload-pack: expected SHA1 object, got '%s'", arg);
1189                 oid_array_append(haves, &oid);
1190                 return 1;
1191         }
1192
1193         return 0;
1194 }
1195
1196 static void process_args(struct packet_reader *request,
1197                          struct upload_pack_data *data)
1198 {
1199         while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1200                 const char *arg = request->line;
1201                 const char *p;
1202
1203                 /* process want */
1204                 if (parse_want(arg))
1205                         continue;
1206                 if (allow_ref_in_want && parse_want_ref(arg, &data->wanted_refs))
1207                         continue;
1208                 /* process have line */
1209                 if (parse_have(arg, &data->haves))
1210                         continue;
1211
1212                 /* process args like thin-pack */
1213                 if (!strcmp(arg, "thin-pack")) {
1214                         use_thin_pack = 1;
1215                         continue;
1216                 }
1217                 if (!strcmp(arg, "ofs-delta")) {
1218                         use_ofs_delta = 1;
1219                         continue;
1220                 }
1221                 if (!strcmp(arg, "no-progress")) {
1222                         no_progress = 1;
1223                         continue;
1224                 }
1225                 if (!strcmp(arg, "include-tag")) {
1226                         use_include_tag = 1;
1227                         continue;
1228                 }
1229                 if (!strcmp(arg, "done")) {
1230                         data->done = 1;
1231                         continue;
1232                 }
1233
1234                 /* Shallow related arguments */
1235                 if (process_shallow(arg, &data->shallows))
1236                         continue;
1237                 if (process_deepen(arg, &data->depth))
1238                         continue;
1239                 if (process_deepen_since(arg, &data->deepen_since,
1240                                          &data->deepen_rev_list))
1241                         continue;
1242                 if (process_deepen_not(arg, &data->deepen_not,
1243                                        &data->deepen_rev_list))
1244                         continue;
1245                 if (!strcmp(arg, "deepen-relative")) {
1246                         data->deepen_relative = 1;
1247                         continue;
1248                 }
1249
1250                 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1251                         parse_list_objects_filter(&filter_options, p);
1252                         continue;
1253                 }
1254
1255                 /* ignore unknown lines maybe? */
1256                 die("unexpected line: '%s'", arg);
1257         }
1258 }
1259
1260 static int process_haves(struct oid_array *haves, struct oid_array *common)
1261 {
1262         int i;
1263
1264         /* Process haves */
1265         for (i = 0; i < haves->nr; i++) {
1266                 const struct object_id *oid = &haves->oid[i];
1267                 struct object *o;
1268                 int we_knew_they_have = 0;
1269
1270                 if (!has_object_file(oid))
1271                         continue;
1272
1273                 oid_array_append(common, oid);
1274
1275                 o = parse_object(the_repository, oid);
1276                 if (!o)
1277                         die("oops (%s)", oid_to_hex(oid));
1278                 if (o->type == OBJ_COMMIT) {
1279                         struct commit_list *parents;
1280                         struct commit *commit = (struct commit *)o;
1281                         if (o->flags & THEY_HAVE)
1282                                 we_knew_they_have = 1;
1283                         else
1284                                 o->flags |= THEY_HAVE;
1285                         if (!oldest_have || (commit->date < oldest_have))
1286                                 oldest_have = commit->date;
1287                         for (parents = commit->parents;
1288                              parents;
1289                              parents = parents->next)
1290                                 parents->item->object.flags |= THEY_HAVE;
1291                 }
1292                 if (!we_knew_they_have)
1293                         add_object_array(o, NULL, &have_obj);
1294         }
1295
1296         return 0;
1297 }
1298
1299 static int send_acks(struct oid_array *acks, struct strbuf *response)
1300 {
1301         int i;
1302
1303         packet_buf_write(response, "acknowledgments\n");
1304
1305         /* Send Acks */
1306         if (!acks->nr)
1307                 packet_buf_write(response, "NAK\n");
1308
1309         for (i = 0; i < acks->nr; i++) {
1310                 packet_buf_write(response, "ACK %s\n",
1311                                  oid_to_hex(&acks->oid[i]));
1312         }
1313
1314         if (ok_to_give_up()) {
1315                 /* Send Ready */
1316                 packet_buf_write(response, "ready\n");
1317                 return 1;
1318         }
1319
1320         return 0;
1321 }
1322
1323 static int process_haves_and_send_acks(struct upload_pack_data *data)
1324 {
1325         struct oid_array common = OID_ARRAY_INIT;
1326         struct strbuf response = STRBUF_INIT;
1327         int ret = 0;
1328
1329         process_haves(&data->haves, &common);
1330         if (data->done) {
1331                 ret = 1;
1332         } else if (send_acks(&common, &response)) {
1333                 packet_buf_delim(&response);
1334                 ret = 1;
1335         } else {
1336                 /* Add Flush */
1337                 packet_buf_flush(&response);
1338                 ret = 0;
1339         }
1340
1341         /* Send response */
1342         write_or_die(1, response.buf, response.len);
1343         strbuf_release(&response);
1344
1345         oid_array_clear(&data->haves);
1346         oid_array_clear(&common);
1347         return ret;
1348 }
1349
1350 static void send_wanted_ref_info(struct upload_pack_data *data)
1351 {
1352         const struct string_list_item *item;
1353
1354         if (!data->wanted_refs.nr)
1355                 return;
1356
1357         packet_write_fmt(1, "wanted-refs\n");
1358
1359         for_each_string_list_item(item, &data->wanted_refs) {
1360                 packet_write_fmt(1, "%s %s\n",
1361                                  oid_to_hex(item->util),
1362                                  item->string);
1363         }
1364
1365         packet_delim(1);
1366 }
1367
1368 static void send_shallow_info(struct upload_pack_data *data)
1369 {
1370         /* No shallow info needs to be sent */
1371         if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1372             !is_repository_shallow(the_repository))
1373                 return;
1374
1375         packet_write_fmt(1, "shallow-info\n");
1376
1377         if (!send_shallow_list(data->depth, data->deepen_rev_list,
1378                                data->deepen_since, &data->deepen_not,
1379                                &data->shallows) &&
1380             is_repository_shallow(the_repository))
1381                 deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows);
1382
1383         packet_delim(1);
1384 }
1385
1386 enum fetch_state {
1387         FETCH_PROCESS_ARGS = 0,
1388         FETCH_SEND_ACKS,
1389         FETCH_SEND_PACK,
1390         FETCH_DONE,
1391 };
1392
1393 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1394                    struct packet_reader *request)
1395 {
1396         enum fetch_state state = FETCH_PROCESS_ARGS;
1397         struct upload_pack_data data;
1398
1399         git_config(upload_pack_config, NULL);
1400
1401         upload_pack_data_init(&data);
1402         use_sideband = LARGE_PACKET_MAX;
1403
1404         while (state != FETCH_DONE) {
1405                 switch (state) {
1406                 case FETCH_PROCESS_ARGS:
1407                         process_args(request, &data);
1408
1409                         if (!want_obj.nr) {
1410                                 /*
1411                                  * Request didn't contain any 'want' lines,
1412                                  * guess they didn't want anything.
1413                                  */
1414                                 state = FETCH_DONE;
1415                         } else if (data.haves.nr) {
1416                                 /*
1417                                  * Request had 'have' lines, so lets ACK them.
1418                                  */
1419                                 state = FETCH_SEND_ACKS;
1420                         } else {
1421                                 /*
1422                                  * Request had 'want's but no 'have's so we can
1423                                  * immedietly go to construct and send a pack.
1424                                  */
1425                                 state = FETCH_SEND_PACK;
1426                         }
1427                         break;
1428                 case FETCH_SEND_ACKS:
1429                         if (process_haves_and_send_acks(&data))
1430                                 state = FETCH_SEND_PACK;
1431                         else
1432                                 state = FETCH_DONE;
1433                         break;
1434                 case FETCH_SEND_PACK:
1435                         send_wanted_ref_info(&data);
1436                         send_shallow_info(&data);
1437
1438                         packet_write_fmt(1, "packfile\n");
1439                         create_pack_file();
1440                         state = FETCH_DONE;
1441                         break;
1442                 case FETCH_DONE:
1443                         continue;
1444                 }
1445         }
1446
1447         upload_pack_data_clear(&data);
1448         return 0;
1449 }
1450
1451 int upload_pack_advertise(struct repository *r,
1452                           struct strbuf *value)
1453 {
1454         if (value) {
1455                 int allow_filter_value;
1456                 int allow_ref_in_want;
1457
1458                 strbuf_addstr(value, "shallow");
1459
1460                 if (!repo_config_get_bool(the_repository,
1461                                          "uploadpack.allowfilter",
1462                                          &allow_filter_value) &&
1463                     allow_filter_value)
1464                         strbuf_addstr(value, " filter");
1465
1466                 if (!repo_config_get_bool(the_repository,
1467                                          "uploadpack.allowrefinwant",
1468                                          &allow_ref_in_want) &&
1469                     allow_ref_in_want)
1470                         strbuf_addstr(value, " ref-in-want");
1471         }
1472
1473         return 1;
1474 }