Merge branch 'jk/run-command-notdot'
[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
448         cmd->argv = argv;
449         cmd->git_cmd = 1;
450         cmd->no_stderr = 1;
451         cmd->in = -1;
452         cmd->out = -1;
453
454         /*
455          * If the next rev-list --stdin encounters an unknown commit,
456          * it terminates, which will cause SIGPIPE in the write loop
457          * below.
458          */
459         sigchain_push(SIGPIPE, SIG_IGN);
460
461         if (start_command(cmd))
462                 goto error;
463
464         namebuf[0] = '^';
465         namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
466         for (i = get_max_object_index(); 0 < i; ) {
467                 o = get_indexed_object(--i);
468                 if (!o)
469                         continue;
470                 if (reachable && o->type == OBJ_COMMIT)
471                         o->flags &= ~TMP_MARK;
472                 if (!is_our_ref(o))
473                         continue;
474                 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
475                 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
476                         goto error;
477         }
478         namebuf[GIT_SHA1_HEXSZ] = '\n';
479         for (i = 0; i < src->nr; i++) {
480                 o = src->objects[i].item;
481                 if (is_our_ref(o)) {
482                         if (reachable)
483                                 add_object_array(o, NULL, reachable);
484                         continue;
485                 }
486                 if (reachable && o->type == OBJ_COMMIT)
487                         o->flags |= TMP_MARK;
488                 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
489                 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
490                         goto error;
491         }
492         close(cmd->in);
493         cmd->in = -1;
494         sigchain_pop(SIGPIPE);
495
496         return 0;
497
498 error:
499         sigchain_pop(SIGPIPE);
500
501         if (cmd->in >= 0)
502                 close(cmd->in);
503         if (cmd->out >= 0)
504                 close(cmd->out);
505         return -1;
506 }
507
508 static int get_reachable_list(struct object_array *src,
509                               struct object_array *reachable)
510 {
511         struct child_process cmd = CHILD_PROCESS_INIT;
512         int i;
513         struct object *o;
514         char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
515         const unsigned hexsz = the_hash_algo->hexsz;
516
517         if (do_reachable_revlist(&cmd, src, reachable) < 0)
518                 return -1;
519
520         while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
521                 struct object_id sha1;
522                 const char *p;
523
524                 if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
525                         break;
526
527                 o = lookup_object(the_repository, sha1.hash);
528                 if (o && o->type == OBJ_COMMIT) {
529                         o->flags &= ~TMP_MARK;
530                 }
531         }
532         for (i = get_max_object_index(); 0 < i; i--) {
533                 o = get_indexed_object(i - 1);
534                 if (o && o->type == OBJ_COMMIT &&
535                     (o->flags & TMP_MARK)) {
536                         add_object_array(o, NULL, reachable);
537                                 o->flags &= ~TMP_MARK;
538                 }
539         }
540         close(cmd.out);
541
542         if (finish_command(&cmd))
543                 return -1;
544
545         return 0;
546 }
547
548 static int has_unreachable(struct object_array *src)
549 {
550         struct child_process cmd = CHILD_PROCESS_INIT;
551         char buf[1];
552         int i;
553
554         if (do_reachable_revlist(&cmd, src, NULL) < 0)
555                 return 1;
556
557         /*
558          * The commits out of the rev-list are not ancestors of
559          * our ref.
560          */
561         i = read_in_full(cmd.out, buf, 1);
562         if (i)
563                 goto error;
564         close(cmd.out);
565         cmd.out = -1;
566
567         /*
568          * rev-list may have died by encountering a bad commit
569          * in the history, in which case we do want to bail out
570          * even when it showed no commit.
571          */
572         if (finish_command(&cmd))
573                 goto error;
574
575         /* All the non-tip ones are ancestors of what we advertised */
576         return 0;
577
578 error:
579         sigchain_pop(SIGPIPE);
580         if (cmd.out >= 0)
581                 close(cmd.out);
582         return 1;
583 }
584
585 static void check_non_tip(void)
586 {
587         int i;
588
589         /*
590          * In the normal in-process case without
591          * uploadpack.allowReachableSHA1InWant,
592          * non-tip requests can never happen.
593          */
594         if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
595                 goto error;
596         if (!has_unreachable(&want_obj))
597                 /* All the non-tip ones are ancestors of what we advertised */
598                 return;
599
600 error:
601         /* Pick one of them (we know there at least is one) */
602         for (i = 0; i < want_obj.nr; i++) {
603                 struct object *o = want_obj.objects[i].item;
604                 if (!is_our_ref(o))
605                         die("git upload-pack: not our ref %s",
606                             oid_to_hex(&o->oid));
607         }
608 }
609
610 static void send_shallow(struct commit_list *result)
611 {
612         while (result) {
613                 struct object *object = &result->item->object;
614                 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
615                         packet_write_fmt(1, "shallow %s",
616                                          oid_to_hex(&object->oid));
617                         register_shallow(the_repository, &object->oid);
618                         shallow_nr++;
619                 }
620                 result = result->next;
621         }
622 }
623
624 static void send_unshallow(const struct object_array *shallows)
625 {
626         int i;
627
628         for (i = 0; i < shallows->nr; i++) {
629                 struct object *object = shallows->objects[i].item;
630                 if (object->flags & NOT_SHALLOW) {
631                         struct commit_list *parents;
632                         packet_write_fmt(1, "unshallow %s",
633                                          oid_to_hex(&object->oid));
634                         object->flags &= ~CLIENT_SHALLOW;
635                         /*
636                          * We want to _register_ "object" as shallow, but we
637                          * also need to traverse object's parents to deepen a
638                          * shallow clone. Unregister it for now so we can
639                          * parse and add the parents to the want list, then
640                          * re-register it.
641                          */
642                         unregister_shallow(&object->oid);
643                         object->parsed = 0;
644                         parse_commit_or_die((struct commit *)object);
645                         parents = ((struct commit *)object)->parents;
646                         while (parents) {
647                                 add_object_array(&parents->item->object,
648                                                  NULL, &want_obj);
649                                 parents = parents->next;
650                         }
651                         add_object_array(object, NULL, &extra_edge_obj);
652                 }
653                 /* make sure commit traversal conforms to client */
654                 register_shallow(the_repository, &object->oid);
655         }
656 }
657
658 static void deepen(int depth, int deepen_relative,
659                    struct object_array *shallows)
660 {
661         if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
662                 int i;
663
664                 for (i = 0; i < shallows->nr; i++) {
665                         struct object *object = shallows->objects[i].item;
666                         object->flags |= NOT_SHALLOW;
667                 }
668         } else if (deepen_relative) {
669                 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
670                 struct commit_list *result;
671
672                 get_reachable_list(shallows, &reachable_shallows);
673                 result = get_shallow_commits(&reachable_shallows,
674                                              depth + 1,
675                                              SHALLOW, NOT_SHALLOW);
676                 send_shallow(result);
677                 free_commit_list(result);
678                 object_array_clear(&reachable_shallows);
679         } else {
680                 struct commit_list *result;
681
682                 result = get_shallow_commits(&want_obj, depth,
683                                              SHALLOW, NOT_SHALLOW);
684                 send_shallow(result);
685                 free_commit_list(result);
686         }
687
688         send_unshallow(shallows);
689 }
690
691 static void deepen_by_rev_list(int ac, const char **av,
692                                struct object_array *shallows)
693 {
694         struct commit_list *result;
695
696         close_commit_graph(the_repository);
697         result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
698         send_shallow(result);
699         free_commit_list(result);
700         send_unshallow(shallows);
701 }
702
703 /* Returns 1 if a shallow list is sent or 0 otherwise */
704 static int send_shallow_list(int depth, int deepen_rev_list,
705                              timestamp_t deepen_since,
706                              struct string_list *deepen_not,
707                              struct object_array *shallows)
708 {
709         int ret = 0;
710
711         if (depth > 0 && deepen_rev_list)
712                 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
713         if (depth > 0) {
714                 deepen(depth, deepen_relative, shallows);
715                 ret = 1;
716         } else if (deepen_rev_list) {
717                 struct argv_array av = ARGV_ARRAY_INIT;
718                 int i;
719
720                 argv_array_push(&av, "rev-list");
721                 if (deepen_since)
722                         argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
723                 if (deepen_not->nr) {
724                         argv_array_push(&av, "--not");
725                         for (i = 0; i < deepen_not->nr; i++) {
726                                 struct string_list_item *s = deepen_not->items + i;
727                                 argv_array_push(&av, s->string);
728                         }
729                         argv_array_push(&av, "--not");
730                 }
731                 for (i = 0; i < want_obj.nr; i++) {
732                         struct object *o = want_obj.objects[i].item;
733                         argv_array_push(&av, oid_to_hex(&o->oid));
734                 }
735                 deepen_by_rev_list(av.argc, av.argv, shallows);
736                 argv_array_clear(&av);
737                 ret = 1;
738         } else {
739                 if (shallows->nr > 0) {
740                         int i;
741                         for (i = 0; i < shallows->nr; i++)
742                                 register_shallow(the_repository,
743                                                  &shallows->objects[i].item->oid);
744                 }
745         }
746
747         shallow_nr += shallows->nr;
748         return ret;
749 }
750
751 static int process_shallow(const char *line, struct object_array *shallows)
752 {
753         const char *arg;
754         if (skip_prefix(line, "shallow ", &arg)) {
755                 struct object_id oid;
756                 struct object *object;
757                 if (get_oid_hex(arg, &oid))
758                         die("invalid shallow line: %s", line);
759                 object = parse_object(the_repository, &oid);
760                 if (!object)
761                         return 1;
762                 if (object->type != OBJ_COMMIT)
763                         die("invalid shallow object %s", oid_to_hex(&oid));
764                 if (!(object->flags & CLIENT_SHALLOW)) {
765                         object->flags |= CLIENT_SHALLOW;
766                         add_object_array(object, NULL, shallows);
767                 }
768                 return 1;
769         }
770
771         return 0;
772 }
773
774 static int process_deepen(const char *line, int *depth)
775 {
776         const char *arg;
777         if (skip_prefix(line, "deepen ", &arg)) {
778                 char *end = NULL;
779                 *depth = (int)strtol(arg, &end, 0);
780                 if (!end || *end || *depth <= 0)
781                         die("Invalid deepen: %s", line);
782                 return 1;
783         }
784
785         return 0;
786 }
787
788 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
789 {
790         const char *arg;
791         if (skip_prefix(line, "deepen-since ", &arg)) {
792                 char *end = NULL;
793                 *deepen_since = parse_timestamp(arg, &end, 0);
794                 if (!end || *end || !deepen_since ||
795                     /* revisions.c's max_age -1 is special */
796                     *deepen_since == -1)
797                         die("Invalid deepen-since: %s", line);
798                 *deepen_rev_list = 1;
799                 return 1;
800         }
801         return 0;
802 }
803
804 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
805 {
806         const char *arg;
807         if (skip_prefix(line, "deepen-not ", &arg)) {
808                 char *ref = NULL;
809                 struct object_id oid;
810                 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
811                         die("git upload-pack: ambiguous deepen-not: %s", line);
812                 string_list_append(deepen_not, ref);
813                 free(ref);
814                 *deepen_rev_list = 1;
815                 return 1;
816         }
817         return 0;
818 }
819
820 static void receive_needs(void)
821 {
822         struct object_array shallows = OBJECT_ARRAY_INIT;
823         struct string_list deepen_not = STRING_LIST_INIT_DUP;
824         int depth = 0;
825         int has_non_tip = 0;
826         timestamp_t deepen_since = 0;
827         int deepen_rev_list = 0;
828
829         shallow_nr = 0;
830         for (;;) {
831                 struct object *o;
832                 const char *features;
833                 struct object_id oid_buf;
834                 char *line = packet_read_line(0, NULL);
835                 const char *arg;
836
837                 reset_timeout();
838                 if (!line)
839                         break;
840
841                 if (process_shallow(line, &shallows))
842                         continue;
843                 if (process_deepen(line, &depth))
844                         continue;
845                 if (process_deepen_since(line, &deepen_since, &deepen_rev_list))
846                         continue;
847                 if (process_deepen_not(line, &deepen_not, &deepen_rev_list))
848                         continue;
849
850                 if (skip_prefix(line, "filter ", &arg)) {
851                         if (!filter_capability_requested)
852                                 die("git upload-pack: filtering capability not negotiated");
853                         parse_list_objects_filter(&filter_options, arg);
854                         continue;
855                 }
856
857                 if (!skip_prefix(line, "want ", &arg) ||
858                     parse_oid_hex(arg, &oid_buf, &features))
859                         die("git upload-pack: protocol error, "
860                             "expected to get object ID, not '%s'", line);
861
862                 if (parse_feature_request(features, "deepen-relative"))
863                         deepen_relative = 1;
864                 if (parse_feature_request(features, "multi_ack_detailed"))
865                         multi_ack = 2;
866                 else if (parse_feature_request(features, "multi_ack"))
867                         multi_ack = 1;
868                 if (parse_feature_request(features, "no-done"))
869                         no_done = 1;
870                 if (parse_feature_request(features, "thin-pack"))
871                         use_thin_pack = 1;
872                 if (parse_feature_request(features, "ofs-delta"))
873                         use_ofs_delta = 1;
874                 if (parse_feature_request(features, "side-band-64k"))
875                         use_sideband = LARGE_PACKET_MAX;
876                 else if (parse_feature_request(features, "side-band"))
877                         use_sideband = DEFAULT_PACKET_MAX;
878                 if (parse_feature_request(features, "no-progress"))
879                         no_progress = 1;
880                 if (parse_feature_request(features, "include-tag"))
881                         use_include_tag = 1;
882                 if (allow_filter && parse_feature_request(features, "filter"))
883                         filter_capability_requested = 1;
884
885                 o = parse_object(the_repository, &oid_buf);
886                 if (!o) {
887                         packet_write_fmt(1,
888                                          "ERR upload-pack: not our ref %s",
889                                          oid_to_hex(&oid_buf));
890                         die("git upload-pack: not our ref %s",
891                             oid_to_hex(&oid_buf));
892                 }
893                 if (!(o->flags & WANTED)) {
894                         o->flags |= WANTED;
895                         if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
896                               || is_our_ref(o)))
897                                 has_non_tip = 1;
898                         add_object_array(o, NULL, &want_obj);
899                 }
900         }
901
902         /*
903          * We have sent all our refs already, and the other end
904          * should have chosen out of them. When we are operating
905          * in the stateless RPC mode, however, their choice may
906          * have been based on the set of older refs advertised
907          * by another process that handled the initial request.
908          */
909         if (has_non_tip)
910                 check_non_tip();
911
912         if (!use_sideband && daemon_mode)
913                 no_progress = 1;
914
915         if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
916                 return;
917
918         if (send_shallow_list(depth, deepen_rev_list, deepen_since,
919                               &deepen_not, &shallows))
920                 packet_flush(1);
921         object_array_clear(&shallows);
922 }
923
924 /* return non-zero if the ref is hidden, otherwise 0 */
925 static int mark_our_ref(const char *refname, const char *refname_full,
926                         const struct object_id *oid)
927 {
928         struct object *o = lookup_unknown_object(oid->hash);
929
930         if (ref_is_hidden(refname, refname_full)) {
931                 o->flags |= HIDDEN_REF;
932                 return 1;
933         }
934         o->flags |= OUR_REF;
935         return 0;
936 }
937
938 static int check_ref(const char *refname_full, const struct object_id *oid,
939                      int flag, void *cb_data)
940 {
941         const char *refname = strip_namespace(refname_full);
942
943         mark_our_ref(refname, refname_full, oid);
944         return 0;
945 }
946
947 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
948 {
949         struct string_list_item *item;
950
951         if (!symref->nr)
952                 return;
953         for_each_string_list_item(item, symref)
954                 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
955 }
956
957 static int send_ref(const char *refname, const struct object_id *oid,
958                     int flag, void *cb_data)
959 {
960         static const char *capabilities = "multi_ack thin-pack side-band"
961                 " side-band-64k ofs-delta shallow deepen-since deepen-not"
962                 " deepen-relative no-progress include-tag multi_ack_detailed";
963         const char *refname_nons = strip_namespace(refname);
964         struct object_id peeled;
965
966         if (mark_our_ref(refname_nons, refname, oid))
967                 return 0;
968
969         if (capabilities) {
970                 struct strbuf symref_info = STRBUF_INIT;
971
972                 format_symref_info(&symref_info, cb_data);
973                 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
974                              oid_to_hex(oid), refname_nons,
975                              0, capabilities,
976                              (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
977                                      " allow-tip-sha1-in-want" : "",
978                              (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
979                                      " allow-reachable-sha1-in-want" : "",
980                              stateless_rpc ? " no-done" : "",
981                              symref_info.buf,
982                              allow_filter ? " filter" : "",
983                              git_user_agent_sanitized());
984                 strbuf_release(&symref_info);
985         } else {
986                 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
987         }
988         capabilities = NULL;
989         if (!peel_ref(refname, &peeled))
990                 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
991         return 0;
992 }
993
994 static int find_symref(const char *refname, const struct object_id *oid,
995                        int flag, void *cb_data)
996 {
997         const char *symref_target;
998         struct string_list_item *item;
999
1000         if ((flag & REF_ISSYMREF) == 0)
1001                 return 0;
1002         symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1003         if (!symref_target || (flag & REF_ISSYMREF) == 0)
1004                 die("'%s' is a symref but it is not?", refname);
1005         item = string_list_append(cb_data, refname);
1006         item->util = xstrdup(symref_target);
1007         return 0;
1008 }
1009
1010 static int upload_pack_config(const char *var, const char *value, void *unused)
1011 {
1012         if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1013                 if (git_config_bool(var, value))
1014                         allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1015                 else
1016                         allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1017         } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1018                 if (git_config_bool(var, value))
1019                         allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1020                 else
1021                         allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1022         } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1023                 if (git_config_bool(var, value))
1024                         allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1025                 else
1026                         allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1027         } else if (!strcmp("uploadpack.keepalive", var)) {
1028                 keepalive = git_config_int(var, value);
1029                 if (!keepalive)
1030                         keepalive = -1;
1031         } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1032                 if (!strcmp("uploadpack.packobjectshook", var))
1033                         return git_config_string(&pack_objects_hook, var, value);
1034         } else if (!strcmp("uploadpack.allowfilter", var)) {
1035                 allow_filter = git_config_bool(var, value);
1036         } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1037                 allow_ref_in_want = git_config_bool(var, value);
1038         }
1039         return parse_hide_refs_config(var, value, "uploadpack");
1040 }
1041
1042 void upload_pack(struct upload_pack_options *options)
1043 {
1044         struct string_list symref = STRING_LIST_INIT_DUP;
1045
1046         stateless_rpc = options->stateless_rpc;
1047         timeout = options->timeout;
1048         daemon_mode = options->daemon_mode;
1049
1050         git_config(upload_pack_config, NULL);
1051
1052         head_ref_namespaced(find_symref, &symref);
1053
1054         if (options->advertise_refs || !stateless_rpc) {
1055                 reset_timeout();
1056                 head_ref_namespaced(send_ref, &symref);
1057                 for_each_namespaced_ref(send_ref, &symref);
1058                 advertise_shallow_grafts(1);
1059                 packet_flush(1);
1060         } else {
1061                 head_ref_namespaced(check_ref, NULL);
1062                 for_each_namespaced_ref(check_ref, NULL);
1063         }
1064         string_list_clear(&symref, 1);
1065         if (options->advertise_refs)
1066                 return;
1067
1068         receive_needs();
1069         if (want_obj.nr) {
1070                 get_common_commits();
1071                 create_pack_file();
1072         }
1073 }
1074
1075 struct upload_pack_data {
1076         struct object_array wants;
1077         struct string_list wanted_refs;
1078         struct oid_array haves;
1079
1080         struct object_array shallows;
1081         struct string_list deepen_not;
1082         int depth;
1083         timestamp_t deepen_since;
1084         int deepen_rev_list;
1085         int deepen_relative;
1086
1087         unsigned stateless_rpc : 1;
1088
1089         unsigned use_thin_pack : 1;
1090         unsigned use_ofs_delta : 1;
1091         unsigned no_progress : 1;
1092         unsigned use_include_tag : 1;
1093         unsigned done : 1;
1094 };
1095
1096 static void upload_pack_data_init(struct upload_pack_data *data)
1097 {
1098         struct object_array wants = OBJECT_ARRAY_INIT;
1099         struct string_list wanted_refs = STRING_LIST_INIT_DUP;
1100         struct oid_array haves = OID_ARRAY_INIT;
1101         struct object_array shallows = OBJECT_ARRAY_INIT;
1102         struct string_list deepen_not = STRING_LIST_INIT_DUP;
1103
1104         memset(data, 0, sizeof(*data));
1105         data->wants = wants;
1106         data->wanted_refs = wanted_refs;
1107         data->haves = haves;
1108         data->shallows = shallows;
1109         data->deepen_not = deepen_not;
1110 }
1111
1112 static void upload_pack_data_clear(struct upload_pack_data *data)
1113 {
1114         object_array_clear(&data->wants);
1115         string_list_clear(&data->wanted_refs, 1);
1116         oid_array_clear(&data->haves);
1117         object_array_clear(&data->shallows);
1118         string_list_clear(&data->deepen_not, 0);
1119 }
1120
1121 static int parse_want(const char *line)
1122 {
1123         const char *arg;
1124         if (skip_prefix(line, "want ", &arg)) {
1125                 struct object_id oid;
1126                 struct object *o;
1127
1128                 if (get_oid_hex(arg, &oid))
1129                         die("git upload-pack: protocol error, "
1130                             "expected to get oid, not '%s'", line);
1131
1132                 o = parse_object(the_repository, &oid);
1133                 if (!o) {
1134                         packet_write_fmt(1,
1135                                          "ERR upload-pack: not our ref %s",
1136                                          oid_to_hex(&oid));
1137                         die("git upload-pack: not our ref %s",
1138                             oid_to_hex(&oid));
1139                 }
1140
1141                 if (!(o->flags & WANTED)) {
1142                         o->flags |= WANTED;
1143                         add_object_array(o, NULL, &want_obj);
1144                 }
1145
1146                 return 1;
1147         }
1148
1149         return 0;
1150 }
1151
1152 static int parse_want_ref(const char *line, struct string_list *wanted_refs)
1153 {
1154         const char *arg;
1155         if (skip_prefix(line, "want-ref ", &arg)) {
1156                 struct object_id oid;
1157                 struct string_list_item *item;
1158                 struct object *o;
1159
1160                 if (read_ref(arg, &oid)) {
1161                         packet_write_fmt(1, "ERR unknown ref %s", arg);
1162                         die("unknown ref %s", arg);
1163                 }
1164
1165                 item = string_list_append(wanted_refs, arg);
1166                 item->util = oiddup(&oid);
1167
1168                 o = parse_object_or_die(&oid, arg);
1169                 if (!(o->flags & WANTED)) {
1170                         o->flags |= WANTED;
1171                         add_object_array(o, NULL, &want_obj);
1172                 }
1173
1174                 return 1;
1175         }
1176
1177         return 0;
1178 }
1179
1180 static int parse_have(const char *line, struct oid_array *haves)
1181 {
1182         const char *arg;
1183         if (skip_prefix(line, "have ", &arg)) {
1184                 struct object_id oid;
1185
1186                 if (get_oid_hex(arg, &oid))
1187                         die("git upload-pack: expected SHA1 object, got '%s'", arg);
1188                 oid_array_append(haves, &oid);
1189                 return 1;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static void process_args(struct packet_reader *request,
1196                          struct upload_pack_data *data)
1197 {
1198         while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1199                 const char *arg = request->line;
1200                 const char *p;
1201
1202                 /* process want */
1203                 if (parse_want(arg))
1204                         continue;
1205                 if (allow_ref_in_want && parse_want_ref(arg, &data->wanted_refs))
1206                         continue;
1207                 /* process have line */
1208                 if (parse_have(arg, &data->haves))
1209                         continue;
1210
1211                 /* process args like thin-pack */
1212                 if (!strcmp(arg, "thin-pack")) {
1213                         use_thin_pack = 1;
1214                         continue;
1215                 }
1216                 if (!strcmp(arg, "ofs-delta")) {
1217                         use_ofs_delta = 1;
1218                         continue;
1219                 }
1220                 if (!strcmp(arg, "no-progress")) {
1221                         no_progress = 1;
1222                         continue;
1223                 }
1224                 if (!strcmp(arg, "include-tag")) {
1225                         use_include_tag = 1;
1226                         continue;
1227                 }
1228                 if (!strcmp(arg, "done")) {
1229                         data->done = 1;
1230                         continue;
1231                 }
1232
1233                 /* Shallow related arguments */
1234                 if (process_shallow(arg, &data->shallows))
1235                         continue;
1236                 if (process_deepen(arg, &data->depth))
1237                         continue;
1238                 if (process_deepen_since(arg, &data->deepen_since,
1239                                          &data->deepen_rev_list))
1240                         continue;
1241                 if (process_deepen_not(arg, &data->deepen_not,
1242                                        &data->deepen_rev_list))
1243                         continue;
1244                 if (!strcmp(arg, "deepen-relative")) {
1245                         data->deepen_relative = 1;
1246                         continue;
1247                 }
1248
1249                 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1250                         parse_list_objects_filter(&filter_options, p);
1251                         continue;
1252                 }
1253
1254                 /* ignore unknown lines maybe? */
1255                 die("unexpected line: '%s'", arg);
1256         }
1257 }
1258
1259 static int process_haves(struct oid_array *haves, struct oid_array *common)
1260 {
1261         int i;
1262
1263         /* Process haves */
1264         for (i = 0; i < haves->nr; i++) {
1265                 const struct object_id *oid = &haves->oid[i];
1266                 struct object *o;
1267                 int we_knew_they_have = 0;
1268
1269                 if (!has_object_file(oid))
1270                         continue;
1271
1272                 oid_array_append(common, oid);
1273
1274                 o = parse_object(the_repository, oid);
1275                 if (!o)
1276                         die("oops (%s)", oid_to_hex(oid));
1277                 if (o->type == OBJ_COMMIT) {
1278                         struct commit_list *parents;
1279                         struct commit *commit = (struct commit *)o;
1280                         if (o->flags & THEY_HAVE)
1281                                 we_knew_they_have = 1;
1282                         else
1283                                 o->flags |= THEY_HAVE;
1284                         if (!oldest_have || (commit->date < oldest_have))
1285                                 oldest_have = commit->date;
1286                         for (parents = commit->parents;
1287                              parents;
1288                              parents = parents->next)
1289                                 parents->item->object.flags |= THEY_HAVE;
1290                 }
1291                 if (!we_knew_they_have)
1292                         add_object_array(o, NULL, &have_obj);
1293         }
1294
1295         return 0;
1296 }
1297
1298 static int send_acks(struct oid_array *acks, struct strbuf *response)
1299 {
1300         int i;
1301
1302         packet_buf_write(response, "acknowledgments\n");
1303
1304         /* Send Acks */
1305         if (!acks->nr)
1306                 packet_buf_write(response, "NAK\n");
1307
1308         for (i = 0; i < acks->nr; i++) {
1309                 packet_buf_write(response, "ACK %s\n",
1310                                  oid_to_hex(&acks->oid[i]));
1311         }
1312
1313         if (ok_to_give_up()) {
1314                 /* Send Ready */
1315                 packet_buf_write(response, "ready\n");
1316                 return 1;
1317         }
1318
1319         return 0;
1320 }
1321
1322 static int process_haves_and_send_acks(struct upload_pack_data *data)
1323 {
1324         struct oid_array common = OID_ARRAY_INIT;
1325         struct strbuf response = STRBUF_INIT;
1326         int ret = 0;
1327
1328         process_haves(&data->haves, &common);
1329         if (data->done) {
1330                 ret = 1;
1331         } else if (send_acks(&common, &response)) {
1332                 packet_buf_delim(&response);
1333                 ret = 1;
1334         } else {
1335                 /* Add Flush */
1336                 packet_buf_flush(&response);
1337                 ret = 0;
1338         }
1339
1340         /* Send response */
1341         write_or_die(1, response.buf, response.len);
1342         strbuf_release(&response);
1343
1344         oid_array_clear(&data->haves);
1345         oid_array_clear(&common);
1346         return ret;
1347 }
1348
1349 static void send_wanted_ref_info(struct upload_pack_data *data)
1350 {
1351         const struct string_list_item *item;
1352
1353         if (!data->wanted_refs.nr)
1354                 return;
1355
1356         packet_write_fmt(1, "wanted-refs\n");
1357
1358         for_each_string_list_item(item, &data->wanted_refs) {
1359                 packet_write_fmt(1, "%s %s\n",
1360                                  oid_to_hex(item->util),
1361                                  item->string);
1362         }
1363
1364         packet_delim(1);
1365 }
1366
1367 static void send_shallow_info(struct upload_pack_data *data)
1368 {
1369         /* No shallow info needs to be sent */
1370         if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1371             !is_repository_shallow(the_repository))
1372                 return;
1373
1374         packet_write_fmt(1, "shallow-info\n");
1375
1376         if (!send_shallow_list(data->depth, data->deepen_rev_list,
1377                                data->deepen_since, &data->deepen_not,
1378                                &data->shallows) &&
1379             is_repository_shallow(the_repository))
1380                 deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows);
1381
1382         packet_delim(1);
1383 }
1384
1385 enum fetch_state {
1386         FETCH_PROCESS_ARGS = 0,
1387         FETCH_SEND_ACKS,
1388         FETCH_SEND_PACK,
1389         FETCH_DONE,
1390 };
1391
1392 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1393                    struct packet_reader *request)
1394 {
1395         enum fetch_state state = FETCH_PROCESS_ARGS;
1396         struct upload_pack_data data;
1397
1398         git_config(upload_pack_config, NULL);
1399
1400         upload_pack_data_init(&data);
1401         use_sideband = LARGE_PACKET_MAX;
1402
1403         while (state != FETCH_DONE) {
1404                 switch (state) {
1405                 case FETCH_PROCESS_ARGS:
1406                         process_args(request, &data);
1407
1408                         if (!want_obj.nr) {
1409                                 /*
1410                                  * Request didn't contain any 'want' lines,
1411                                  * guess they didn't want anything.
1412                                  */
1413                                 state = FETCH_DONE;
1414                         } else if (data.haves.nr) {
1415                                 /*
1416                                  * Request had 'have' lines, so lets ACK them.
1417                                  */
1418                                 state = FETCH_SEND_ACKS;
1419                         } else {
1420                                 /*
1421                                  * Request had 'want's but no 'have's so we can
1422                                  * immedietly go to construct and send a pack.
1423                                  */
1424                                 state = FETCH_SEND_PACK;
1425                         }
1426                         break;
1427                 case FETCH_SEND_ACKS:
1428                         if (process_haves_and_send_acks(&data))
1429                                 state = FETCH_SEND_PACK;
1430                         else
1431                                 state = FETCH_DONE;
1432                         break;
1433                 case FETCH_SEND_PACK:
1434                         send_wanted_ref_info(&data);
1435                         send_shallow_info(&data);
1436
1437                         packet_write_fmt(1, "packfile\n");
1438                         create_pack_file();
1439                         state = FETCH_DONE;
1440                         break;
1441                 case FETCH_DONE:
1442                         continue;
1443                 }
1444         }
1445
1446         upload_pack_data_clear(&data);
1447         return 0;
1448 }
1449
1450 int upload_pack_advertise(struct repository *r,
1451                           struct strbuf *value)
1452 {
1453         if (value) {
1454                 int allow_filter_value;
1455                 int allow_ref_in_want;
1456
1457                 strbuf_addstr(value, "shallow");
1458
1459                 if (!repo_config_get_bool(the_repository,
1460                                          "uploadpack.allowfilter",
1461                                          &allow_filter_value) &&
1462                     allow_filter_value)
1463                         strbuf_addstr(value, " filter");
1464
1465                 if (!repo_config_get_bool(the_repository,
1466                                          "uploadpack.allowrefinwant",
1467                                          &allow_ref_in_want) &&
1468                     allow_ref_in_want)
1469                         strbuf_addstr(value, " ref-in-want");
1470         }
1471
1472         return 1;
1473 }