Merge branch 'es/worktree-forced-ops-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-reach.h"
28
29 /* Remember to update object flag allocation in object.h */
30 #define THEY_HAVE       (1u << 11)
31 #define OUR_REF         (1u << 12)
32 #define WANTED          (1u << 13)
33 #define COMMON_KNOWN    (1u << 14)
34
35 #define SHALLOW         (1u << 16)
36 #define NOT_SHALLOW     (1u << 17)
37 #define CLIENT_SHALLOW  (1u << 18)
38 #define HIDDEN_REF      (1u << 19)
39
40 static timestamp_t oldest_have;
41
42 static int deepen_relative;
43 static int multi_ack;
44 static int no_done;
45 static int use_thin_pack, use_ofs_delta, use_include_tag;
46 static int no_progress, daemon_mode;
47 /* Allow specifying sha1 if it is a ref tip. */
48 #define ALLOW_TIP_SHA1  01
49 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
50 #define ALLOW_REACHABLE_SHA1    02
51 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
52 #define ALLOW_ANY_SHA1  07
53 static unsigned int allow_unadvertised_object_request;
54 static int shallow_nr;
55 static struct object_array have_obj;
56 static struct object_array want_obj;
57 static struct object_array extra_edge_obj;
58 static unsigned int timeout;
59 static int keepalive = 5;
60 /* 0 for no sideband,
61  * otherwise maximum packet size (up to 65520 bytes).
62  */
63 static int use_sideband;
64 static int stateless_rpc;
65 static const char *pack_objects_hook;
66
67 static int filter_capability_requested;
68 static int allow_filter;
69 static int allow_ref_in_want;
70 static struct list_objects_filter_options filter_options;
71
72 static void reset_timeout(void)
73 {
74         alarm(timeout);
75 }
76
77 static void send_client_data(int fd, const char *data, ssize_t sz)
78 {
79         if (use_sideband) {
80                 send_sideband(1, fd, data, sz, use_sideband);
81                 return;
82         }
83         if (fd == 3)
84                 /* emergency quit */
85                 fd = 2;
86         if (fd == 2) {
87                 /* XXX: are we happy to lose stuff here? */
88                 xwrite(fd, data, sz);
89                 return;
90         }
91         write_or_die(fd, data, sz);
92 }
93
94 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
95 {
96         FILE *fp = cb_data;
97         if (graft->nr_parent == -1)
98                 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
99         return 0;
100 }
101
102 static void create_pack_file(void)
103 {
104         struct child_process pack_objects = CHILD_PROCESS_INIT;
105         char data[8193], progress[128];
106         char abort_msg[] = "aborting due to possible repository "
107                 "corruption on the remote side.";
108         int buffered = -1;
109         ssize_t sz;
110         int i;
111         FILE *pipe_fd;
112
113         if (!pack_objects_hook)
114                 pack_objects.git_cmd = 1;
115         else {
116                 argv_array_push(&pack_objects.args, pack_objects_hook);
117                 argv_array_push(&pack_objects.args, "git");
118                 pack_objects.use_shell = 1;
119         }
120
121         if (shallow_nr) {
122                 argv_array_push(&pack_objects.args, "--shallow-file");
123                 argv_array_push(&pack_objects.args, "");
124         }
125         argv_array_push(&pack_objects.args, "pack-objects");
126         argv_array_push(&pack_objects.args, "--revs");
127         if (use_thin_pack)
128                 argv_array_push(&pack_objects.args, "--thin");
129
130         argv_array_push(&pack_objects.args, "--stdout");
131         if (shallow_nr)
132                 argv_array_push(&pack_objects.args, "--shallow");
133         if (!no_progress)
134                 argv_array_push(&pack_objects.args, "--progress");
135         if (use_ofs_delta)
136                 argv_array_push(&pack_objects.args, "--delta-base-offset");
137         if (use_include_tag)
138                 argv_array_push(&pack_objects.args, "--include-tag");
139         if (filter_options.filter_spec) {
140                 if (pack_objects.use_shell) {
141                         struct strbuf buf = STRBUF_INIT;
142                         sq_quote_buf(&buf, filter_options.filter_spec);
143                         argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
144                         strbuf_release(&buf);
145                 } else {
146                         argv_array_pushf(&pack_objects.args, "--filter=%s",
147                                          filter_options.filter_spec);
148                 }
149         }
150
151         pack_objects.in = -1;
152         pack_objects.out = -1;
153         pack_objects.err = -1;
154
155         if (start_command(&pack_objects))
156                 die("git upload-pack: unable to fork git-pack-objects");
157
158         pipe_fd = xfdopen(pack_objects.in, "w");
159
160         if (shallow_nr)
161                 for_each_commit_graft(write_one_shallow, pipe_fd);
162
163         for (i = 0; i < want_obj.nr; i++)
164                 fprintf(pipe_fd, "%s\n",
165                         oid_to_hex(&want_obj.objects[i].item->oid));
166         fprintf(pipe_fd, "--not\n");
167         for (i = 0; i < have_obj.nr; i++)
168                 fprintf(pipe_fd, "%s\n",
169                         oid_to_hex(&have_obj.objects[i].item->oid));
170         for (i = 0; i < extra_edge_obj.nr; i++)
171                 fprintf(pipe_fd, "%s\n",
172                         oid_to_hex(&extra_edge_obj.objects[i].item->oid));
173         fprintf(pipe_fd, "\n");
174         fflush(pipe_fd);
175         fclose(pipe_fd);
176
177         /* We read from pack_objects.err to capture stderr output for
178          * progress bar, and pack_objects.out to capture the pack data.
179          */
180
181         while (1) {
182                 struct pollfd pfd[2];
183                 int pe, pu, pollsize;
184                 int ret;
185
186                 reset_timeout();
187
188                 pollsize = 0;
189                 pe = pu = -1;
190
191                 if (0 <= pack_objects.out) {
192                         pfd[pollsize].fd = pack_objects.out;
193                         pfd[pollsize].events = POLLIN;
194                         pu = pollsize;
195                         pollsize++;
196                 }
197                 if (0 <= pack_objects.err) {
198                         pfd[pollsize].fd = pack_objects.err;
199                         pfd[pollsize].events = POLLIN;
200                         pe = pollsize;
201                         pollsize++;
202                 }
203
204                 if (!pollsize)
205                         break;
206
207                 ret = poll(pfd, pollsize,
208                         keepalive < 0 ? -1 : 1000 * keepalive);
209
210                 if (ret < 0) {
211                         if (errno != EINTR) {
212                                 error_errno("poll failed, resuming");
213                                 sleep(1);
214                         }
215                         continue;
216                 }
217                 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
218                         /* Status ready; we ship that in the side-band
219                          * or dump to the standard error.
220                          */
221                         sz = xread(pack_objects.err, progress,
222                                   sizeof(progress));
223                         if (0 < sz)
224                                 send_client_data(2, progress, sz);
225                         else if (sz == 0) {
226                                 close(pack_objects.err);
227                                 pack_objects.err = -1;
228                         }
229                         else
230                                 goto fail;
231                         /* give priority to status messages */
232                         continue;
233                 }
234                 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
235                         /* Data ready; we keep the last byte to ourselves
236                          * in case we detect broken rev-list, so that we
237                          * can leave the stream corrupted.  This is
238                          * unfortunate -- unpack-objects would happily
239                          * accept a valid packdata with trailing garbage,
240                          * so appending garbage after we pass all the
241                          * pack data is not good enough to signal
242                          * breakage to downstream.
243                          */
244                         char *cp = data;
245                         ssize_t outsz = 0;
246                         if (0 <= buffered) {
247                                 *cp++ = buffered;
248                                 outsz++;
249                         }
250                         sz = xread(pack_objects.out, cp,
251                                   sizeof(data) - outsz);
252                         if (0 < sz)
253                                 ;
254                         else if (sz == 0) {
255                                 close(pack_objects.out);
256                                 pack_objects.out = -1;
257                         }
258                         else
259                                 goto fail;
260                         sz += outsz;
261                         if (1 < sz) {
262                                 buffered = data[sz-1] & 0xFF;
263                                 sz--;
264                         }
265                         else
266                                 buffered = -1;
267                         send_client_data(1, data, sz);
268                 }
269
270                 /*
271                  * We hit the keepalive timeout without saying anything; send
272                  * an empty message on the data sideband just to let the other
273                  * side know we're still working on it, but don't have any data
274                  * yet.
275                  *
276                  * If we don't have a sideband channel, there's no room in the
277                  * protocol to say anything, so those clients are just out of
278                  * luck.
279                  */
280                 if (!ret && use_sideband) {
281                         static const char buf[] = "0005\1";
282                         write_or_die(1, buf, 5);
283                 }
284         }
285
286         if (finish_command(&pack_objects)) {
287                 error("git upload-pack: git-pack-objects died with error.");
288                 goto fail;
289         }
290
291         /* flush the data */
292         if (0 <= buffered) {
293                 data[0] = buffered;
294                 send_client_data(1, data, 1);
295                 fprintf(stderr, "flushed.\n");
296         }
297         if (use_sideband)
298                 packet_flush(1);
299         return;
300
301  fail:
302         send_client_data(3, abort_msg, sizeof(abort_msg));
303         die("git upload-pack: %s", abort_msg);
304 }
305
306 static int got_oid(const char *hex, struct object_id *oid)
307 {
308         struct object *o;
309         int we_knew_they_have = 0;
310
311         if (get_oid_hex(hex, oid))
312                 die("git upload-pack: expected SHA1 object, got '%s'", hex);
313         if (!has_object_file(oid))
314                 return -1;
315
316         o = parse_object(the_repository, oid);
317         if (!o)
318                 die("oops (%s)", oid_to_hex(oid));
319         if (o->type == OBJ_COMMIT) {
320                 struct commit_list *parents;
321                 struct commit *commit = (struct commit *)o;
322                 if (o->flags & THEY_HAVE)
323                         we_knew_they_have = 1;
324                 else
325                         o->flags |= THEY_HAVE;
326                 if (!oldest_have || (commit->date < oldest_have))
327                         oldest_have = commit->date;
328                 for (parents = commit->parents;
329                      parents;
330                      parents = parents->next)
331                         parents->item->object.flags |= THEY_HAVE;
332         }
333         if (!we_knew_they_have) {
334                 add_object_array(o, NULL, &have_obj);
335                 return 1;
336         }
337         return 0;
338 }
339
340 static int ok_to_give_up(void)
341 {
342         uint32_t min_generation = GENERATION_NUMBER_ZERO;
343
344         if (!have_obj.nr)
345                 return 0;
346
347         return can_all_from_reach_with_flag(&want_obj, THEY_HAVE,
348                                             COMMON_KNOWN, oldest_have,
349                                             min_generation);
350 }
351
352 static int get_common_commits(void)
353 {
354         struct object_id oid;
355         char last_hex[GIT_MAX_HEXSZ + 1];
356         int got_common = 0;
357         int got_other = 0;
358         int sent_ready = 0;
359
360         save_commit_buffer = 0;
361
362         for (;;) {
363                 char *line = packet_read_line(0, NULL);
364                 const char *arg;
365
366                 reset_timeout();
367
368                 if (!line) {
369                         if (multi_ack == 2 && got_common
370                             && !got_other && ok_to_give_up()) {
371                                 sent_ready = 1;
372                                 packet_write_fmt(1, "ACK %s ready\n", last_hex);
373                         }
374                         if (have_obj.nr == 0 || multi_ack)
375                                 packet_write_fmt(1, "NAK\n");
376
377                         if (no_done && sent_ready) {
378                                 packet_write_fmt(1, "ACK %s\n", last_hex);
379                                 return 0;
380                         }
381                         if (stateless_rpc)
382                                 exit(0);
383                         got_common = 0;
384                         got_other = 0;
385                         continue;
386                 }
387                 if (skip_prefix(line, "have ", &arg)) {
388                         switch (got_oid(arg, &oid)) {
389                         case -1: /* they have what we do not */
390                                 got_other = 1;
391                                 if (multi_ack && ok_to_give_up()) {
392                                         const char *hex = oid_to_hex(&oid);
393                                         if (multi_ack == 2) {
394                                                 sent_ready = 1;
395                                                 packet_write_fmt(1, "ACK %s ready\n", hex);
396                                         } else
397                                                 packet_write_fmt(1, "ACK %s continue\n", hex);
398                                 }
399                                 break;
400                         default:
401                                 got_common = 1;
402                                 oid_to_hex_r(last_hex, &oid);
403                                 if (multi_ack == 2)
404                                         packet_write_fmt(1, "ACK %s common\n", last_hex);
405                                 else if (multi_ack)
406                                         packet_write_fmt(1, "ACK %s continue\n", last_hex);
407                                 else if (have_obj.nr == 1)
408                                         packet_write_fmt(1, "ACK %s\n", last_hex);
409                                 break;
410                         }
411                         continue;
412                 }
413                 if (!strcmp(line, "done")) {
414                         if (have_obj.nr > 0) {
415                                 if (multi_ack)
416                                         packet_write_fmt(1, "ACK %s\n", last_hex);
417                                 return 0;
418                         }
419                         packet_write_fmt(1, "NAK\n");
420                         return -1;
421                 }
422                 die("git upload-pack: expected SHA1 list, got '%s'", line);
423         }
424 }
425
426 static int is_our_ref(struct object *o)
427 {
428         int allow_hidden_ref = (allow_unadvertised_object_request &
429                         (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
430         return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
431 }
432
433 /*
434  * on successful case, it's up to the caller to close cmd->out
435  */
436 static int do_reachable_revlist(struct child_process *cmd,
437                                 struct object_array *src,
438                                 struct object_array *reachable)
439 {
440         static const char *argv[] = {
441                 "rev-list", "--stdin", NULL,
442         };
443         struct object *o;
444         char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
445         int i;
446
447         cmd->argv = argv;
448         cmd->git_cmd = 1;
449         cmd->no_stderr = 1;
450         cmd->in = -1;
451         cmd->out = -1;
452
453         /*
454          * If the next rev-list --stdin encounters an unknown commit,
455          * it terminates, which will cause SIGPIPE in the write loop
456          * below.
457          */
458         sigchain_push(SIGPIPE, SIG_IGN);
459
460         if (start_command(cmd))
461                 goto error;
462
463         namebuf[0] = '^';
464         namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
465         for (i = get_max_object_index(); 0 < i; ) {
466                 o = get_indexed_object(--i);
467                 if (!o)
468                         continue;
469                 if (reachable && o->type == OBJ_COMMIT)
470                         o->flags &= ~TMP_MARK;
471                 if (!is_our_ref(o))
472                         continue;
473                 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
474                 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
475                         goto error;
476         }
477         namebuf[GIT_SHA1_HEXSZ] = '\n';
478         for (i = 0; i < src->nr; i++) {
479                 o = src->objects[i].item;
480                 if (is_our_ref(o)) {
481                         if (reachable)
482                                 add_object_array(o, NULL, reachable);
483                         continue;
484                 }
485                 if (reachable && o->type == OBJ_COMMIT)
486                         o->flags |= TMP_MARK;
487                 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
488                 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
489                         goto error;
490         }
491         close(cmd->in);
492         cmd->in = -1;
493         sigchain_pop(SIGPIPE);
494
495         return 0;
496
497 error:
498         sigchain_pop(SIGPIPE);
499
500         if (cmd->in >= 0)
501                 close(cmd->in);
502         if (cmd->out >= 0)
503                 close(cmd->out);
504         return -1;
505 }
506
507 static int get_reachable_list(struct object_array *src,
508                               struct object_array *reachable)
509 {
510         struct child_process cmd = CHILD_PROCESS_INIT;
511         int i;
512         struct object *o;
513         char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
514         const unsigned hexsz = the_hash_algo->hexsz;
515
516         if (do_reachable_revlist(&cmd, src, reachable) < 0)
517                 return -1;
518
519         while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
520                 struct object_id sha1;
521                 const char *p;
522
523                 if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n')
524                         break;
525
526                 o = lookup_object(the_repository, sha1.hash);
527                 if (o && o->type == OBJ_COMMIT) {
528                         o->flags &= ~TMP_MARK;
529                 }
530         }
531         for (i = get_max_object_index(); 0 < i; i--) {
532                 o = get_indexed_object(i - 1);
533                 if (o && o->type == OBJ_COMMIT &&
534                     (o->flags & TMP_MARK)) {
535                         add_object_array(o, NULL, reachable);
536                                 o->flags &= ~TMP_MARK;
537                 }
538         }
539         close(cmd.out);
540
541         if (finish_command(&cmd))
542                 return -1;
543
544         return 0;
545 }
546
547 static int has_unreachable(struct object_array *src)
548 {
549         struct child_process cmd = CHILD_PROCESS_INIT;
550         char buf[1];
551         int i;
552
553         if (do_reachable_revlist(&cmd, src, NULL) < 0)
554                 return 1;
555
556         /*
557          * The commits out of the rev-list are not ancestors of
558          * our ref.
559          */
560         i = read_in_full(cmd.out, buf, 1);
561         if (i)
562                 goto error;
563         close(cmd.out);
564         cmd.out = -1;
565
566         /*
567          * rev-list may have died by encountering a bad commit
568          * in the history, in which case we do want to bail out
569          * even when it showed no commit.
570          */
571         if (finish_command(&cmd))
572                 goto error;
573
574         /* All the non-tip ones are ancestors of what we advertised */
575         return 0;
576
577 error:
578         sigchain_pop(SIGPIPE);
579         if (cmd.out >= 0)
580                 close(cmd.out);
581         return 1;
582 }
583
584 static void check_non_tip(void)
585 {
586         int i;
587
588         /*
589          * In the normal in-process case without
590          * uploadpack.allowReachableSHA1InWant,
591          * non-tip requests can never happen.
592          */
593         if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
594                 goto error;
595         if (!has_unreachable(&want_obj))
596                 /* All the non-tip ones are ancestors of what we advertised */
597                 return;
598
599 error:
600         /* Pick one of them (we know there at least is one) */
601         for (i = 0; i < want_obj.nr; i++) {
602                 struct object *o = want_obj.objects[i].item;
603                 if (!is_our_ref(o))
604                         die("git upload-pack: not our ref %s",
605                             oid_to_hex(&o->oid));
606         }
607 }
608
609 static void send_shallow(struct commit_list *result)
610 {
611         while (result) {
612                 struct object *object = &result->item->object;
613                 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
614                         packet_write_fmt(1, "shallow %s",
615                                          oid_to_hex(&object->oid));
616                         register_shallow(the_repository, &object->oid);
617                         shallow_nr++;
618                 }
619                 result = result->next;
620         }
621 }
622
623 static void send_unshallow(const struct object_array *shallows)
624 {
625         int i;
626
627         for (i = 0; i < shallows->nr; i++) {
628                 struct object *object = shallows->objects[i].item;
629                 if (object->flags & NOT_SHALLOW) {
630                         struct commit_list *parents;
631                         packet_write_fmt(1, "unshallow %s",
632                                          oid_to_hex(&object->oid));
633                         object->flags &= ~CLIENT_SHALLOW;
634                         /*
635                          * We want to _register_ "object" as shallow, but we
636                          * also need to traverse object's parents to deepen a
637                          * shallow clone. Unregister it for now so we can
638                          * parse and add the parents to the want list, then
639                          * re-register it.
640                          */
641                         unregister_shallow(&object->oid);
642                         object->parsed = 0;
643                         parse_commit_or_die((struct commit *)object);
644                         parents = ((struct commit *)object)->parents;
645                         while (parents) {
646                                 add_object_array(&parents->item->object,
647                                                  NULL, &want_obj);
648                                 parents = parents->next;
649                         }
650                         add_object_array(object, NULL, &extra_edge_obj);
651                 }
652                 /* make sure commit traversal conforms to client */
653                 register_shallow(the_repository, &object->oid);
654         }
655 }
656
657 static void deepen(int depth, int deepen_relative,
658                    struct object_array *shallows)
659 {
660         if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
661                 int i;
662
663                 for (i = 0; i < shallows->nr; i++) {
664                         struct object *object = shallows->objects[i].item;
665                         object->flags |= NOT_SHALLOW;
666                 }
667         } else if (deepen_relative) {
668                 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
669                 struct commit_list *result;
670
671                 get_reachable_list(shallows, &reachable_shallows);
672                 result = get_shallow_commits(&reachable_shallows,
673                                              depth + 1,
674                                              SHALLOW, NOT_SHALLOW);
675                 send_shallow(result);
676                 free_commit_list(result);
677                 object_array_clear(&reachable_shallows);
678         } else {
679                 struct commit_list *result;
680
681                 result = get_shallow_commits(&want_obj, depth,
682                                              SHALLOW, NOT_SHALLOW);
683                 send_shallow(result);
684                 free_commit_list(result);
685         }
686
687         send_unshallow(shallows);
688 }
689
690 static void deepen_by_rev_list(int ac, const char **av,
691                                struct object_array *shallows)
692 {
693         struct commit_list *result;
694
695         result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
696         send_shallow(result);
697         free_commit_list(result);
698         send_unshallow(shallows);
699 }
700
701 /* Returns 1 if a shallow list is sent or 0 otherwise */
702 static int send_shallow_list(int depth, int deepen_rev_list,
703                              timestamp_t deepen_since,
704                              struct string_list *deepen_not,
705                              struct object_array *shallows)
706 {
707         int ret = 0;
708
709         if (depth > 0 && deepen_rev_list)
710                 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
711         if (depth > 0) {
712                 deepen(depth, deepen_relative, shallows);
713                 ret = 1;
714         } else if (deepen_rev_list) {
715                 struct argv_array av = ARGV_ARRAY_INIT;
716                 int i;
717
718                 argv_array_push(&av, "rev-list");
719                 if (deepen_since)
720                         argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
721                 if (deepen_not->nr) {
722                         argv_array_push(&av, "--not");
723                         for (i = 0; i < deepen_not->nr; i++) {
724                                 struct string_list_item *s = deepen_not->items + i;
725                                 argv_array_push(&av, s->string);
726                         }
727                         argv_array_push(&av, "--not");
728                 }
729                 for (i = 0; i < want_obj.nr; i++) {
730                         struct object *o = want_obj.objects[i].item;
731                         argv_array_push(&av, oid_to_hex(&o->oid));
732                 }
733                 deepen_by_rev_list(av.argc, av.argv, shallows);
734                 argv_array_clear(&av);
735                 ret = 1;
736         } else {
737                 if (shallows->nr > 0) {
738                         int i;
739                         for (i = 0; i < shallows->nr; i++)
740                                 register_shallow(the_repository,
741                                                  &shallows->objects[i].item->oid);
742                 }
743         }
744
745         shallow_nr += shallows->nr;
746         return ret;
747 }
748
749 static int process_shallow(const char *line, struct object_array *shallows)
750 {
751         const char *arg;
752         if (skip_prefix(line, "shallow ", &arg)) {
753                 struct object_id oid;
754                 struct object *object;
755                 if (get_oid_hex(arg, &oid))
756                         die("invalid shallow line: %s", line);
757                 object = parse_object(the_repository, &oid);
758                 if (!object)
759                         return 1;
760                 if (object->type != OBJ_COMMIT)
761                         die("invalid shallow object %s", oid_to_hex(&oid));
762                 if (!(object->flags & CLIENT_SHALLOW)) {
763                         object->flags |= CLIENT_SHALLOW;
764                         add_object_array(object, NULL, shallows);
765                 }
766                 return 1;
767         }
768
769         return 0;
770 }
771
772 static int process_deepen(const char *line, int *depth)
773 {
774         const char *arg;
775         if (skip_prefix(line, "deepen ", &arg)) {
776                 char *end = NULL;
777                 *depth = (int)strtol(arg, &end, 0);
778                 if (!end || *end || *depth <= 0)
779                         die("Invalid deepen: %s", line);
780                 return 1;
781         }
782
783         return 0;
784 }
785
786 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
787 {
788         const char *arg;
789         if (skip_prefix(line, "deepen-since ", &arg)) {
790                 char *end = NULL;
791                 *deepen_since = parse_timestamp(arg, &end, 0);
792                 if (!end || *end || !deepen_since ||
793                     /* revisions.c's max_age -1 is special */
794                     *deepen_since == -1)
795                         die("Invalid deepen-since: %s", line);
796                 *deepen_rev_list = 1;
797                 return 1;
798         }
799         return 0;
800 }
801
802 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
803 {
804         const char *arg;
805         if (skip_prefix(line, "deepen-not ", &arg)) {
806                 char *ref = NULL;
807                 struct object_id oid;
808                 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
809                         die("git upload-pack: ambiguous deepen-not: %s", line);
810                 string_list_append(deepen_not, ref);
811                 free(ref);
812                 *deepen_rev_list = 1;
813                 return 1;
814         }
815         return 0;
816 }
817
818 static void receive_needs(void)
819 {
820         struct object_array shallows = OBJECT_ARRAY_INIT;
821         struct string_list deepen_not = STRING_LIST_INIT_DUP;
822         int depth = 0;
823         int has_non_tip = 0;
824         timestamp_t deepen_since = 0;
825         int deepen_rev_list = 0;
826
827         shallow_nr = 0;
828         for (;;) {
829                 struct object *o;
830                 const char *features;
831                 struct object_id oid_buf;
832                 char *line = packet_read_line(0, NULL);
833                 const char *arg;
834
835                 reset_timeout();
836                 if (!line)
837                         break;
838
839                 if (process_shallow(line, &shallows))
840                         continue;
841                 if (process_deepen(line, &depth))
842                         continue;
843                 if (process_deepen_since(line, &deepen_since, &deepen_rev_list))
844                         continue;
845                 if (process_deepen_not(line, &deepen_not, &deepen_rev_list))
846                         continue;
847
848                 if (skip_prefix(line, "filter ", &arg)) {
849                         if (!filter_capability_requested)
850                                 die("git upload-pack: filtering capability not negotiated");
851                         parse_list_objects_filter(&filter_options, arg);
852                         continue;
853                 }
854
855                 if (!skip_prefix(line, "want ", &arg) ||
856                     parse_oid_hex(arg, &oid_buf, &features))
857                         die("git upload-pack: protocol error, "
858                             "expected to get object ID, not '%s'", line);
859
860                 if (parse_feature_request(features, "deepen-relative"))
861                         deepen_relative = 1;
862                 if (parse_feature_request(features, "multi_ack_detailed"))
863                         multi_ack = 2;
864                 else if (parse_feature_request(features, "multi_ack"))
865                         multi_ack = 1;
866                 if (parse_feature_request(features, "no-done"))
867                         no_done = 1;
868                 if (parse_feature_request(features, "thin-pack"))
869                         use_thin_pack = 1;
870                 if (parse_feature_request(features, "ofs-delta"))
871                         use_ofs_delta = 1;
872                 if (parse_feature_request(features, "side-band-64k"))
873                         use_sideband = LARGE_PACKET_MAX;
874                 else if (parse_feature_request(features, "side-band"))
875                         use_sideband = DEFAULT_PACKET_MAX;
876                 if (parse_feature_request(features, "no-progress"))
877                         no_progress = 1;
878                 if (parse_feature_request(features, "include-tag"))
879                         use_include_tag = 1;
880                 if (allow_filter && parse_feature_request(features, "filter"))
881                         filter_capability_requested = 1;
882
883                 o = parse_object(the_repository, &oid_buf);
884                 if (!o) {
885                         packet_write_fmt(1,
886                                          "ERR upload-pack: not our ref %s",
887                                          oid_to_hex(&oid_buf));
888                         die("git upload-pack: not our ref %s",
889                             oid_to_hex(&oid_buf));
890                 }
891                 if (!(o->flags & WANTED)) {
892                         o->flags |= WANTED;
893                         if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
894                               || is_our_ref(o)))
895                                 has_non_tip = 1;
896                         add_object_array(o, NULL, &want_obj);
897                 }
898         }
899
900         /*
901          * We have sent all our refs already, and the other end
902          * should have chosen out of them. When we are operating
903          * in the stateless RPC mode, however, their choice may
904          * have been based on the set of older refs advertised
905          * by another process that handled the initial request.
906          */
907         if (has_non_tip)
908                 check_non_tip();
909
910         if (!use_sideband && daemon_mode)
911                 no_progress = 1;
912
913         if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
914                 return;
915
916         if (send_shallow_list(depth, deepen_rev_list, deepen_since,
917                               &deepen_not, &shallows))
918                 packet_flush(1);
919         object_array_clear(&shallows);
920 }
921
922 /* return non-zero if the ref is hidden, otherwise 0 */
923 static int mark_our_ref(const char *refname, const char *refname_full,
924                         const struct object_id *oid)
925 {
926         struct object *o = lookup_unknown_object(oid->hash);
927
928         if (ref_is_hidden(refname, refname_full)) {
929                 o->flags |= HIDDEN_REF;
930                 return 1;
931         }
932         o->flags |= OUR_REF;
933         return 0;
934 }
935
936 static int check_ref(const char *refname_full, const struct object_id *oid,
937                      int flag, void *cb_data)
938 {
939         const char *refname = strip_namespace(refname_full);
940
941         mark_our_ref(refname, refname_full, oid);
942         return 0;
943 }
944
945 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
946 {
947         struct string_list_item *item;
948
949         if (!symref->nr)
950                 return;
951         for_each_string_list_item(item, symref)
952                 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
953 }
954
955 static int send_ref(const char *refname, const struct object_id *oid,
956                     int flag, void *cb_data)
957 {
958         static const char *capabilities = "multi_ack thin-pack side-band"
959                 " side-band-64k ofs-delta shallow deepen-since deepen-not"
960                 " deepen-relative no-progress include-tag multi_ack_detailed";
961         const char *refname_nons = strip_namespace(refname);
962         struct object_id peeled;
963
964         if (mark_our_ref(refname_nons, refname, oid))
965                 return 0;
966
967         if (capabilities) {
968                 struct strbuf symref_info = STRBUF_INIT;
969
970                 format_symref_info(&symref_info, cb_data);
971                 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
972                              oid_to_hex(oid), refname_nons,
973                              0, capabilities,
974                              (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
975                                      " allow-tip-sha1-in-want" : "",
976                              (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
977                                      " allow-reachable-sha1-in-want" : "",
978                              stateless_rpc ? " no-done" : "",
979                              symref_info.buf,
980                              allow_filter ? " filter" : "",
981                              git_user_agent_sanitized());
982                 strbuf_release(&symref_info);
983         } else {
984                 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
985         }
986         capabilities = NULL;
987         if (!peel_ref(refname, &peeled))
988                 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
989         return 0;
990 }
991
992 static int find_symref(const char *refname, const struct object_id *oid,
993                        int flag, void *cb_data)
994 {
995         const char *symref_target;
996         struct string_list_item *item;
997
998         if ((flag & REF_ISSYMREF) == 0)
999                 return 0;
1000         symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1001         if (!symref_target || (flag & REF_ISSYMREF) == 0)
1002                 die("'%s' is a symref but it is not?", refname);
1003         item = string_list_append(cb_data, refname);
1004         item->util = xstrdup(symref_target);
1005         return 0;
1006 }
1007
1008 static int upload_pack_config(const char *var, const char *value, void *unused)
1009 {
1010         if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1011                 if (git_config_bool(var, value))
1012                         allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1013                 else
1014                         allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
1015         } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1016                 if (git_config_bool(var, value))
1017                         allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1018                 else
1019                         allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
1020         } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1021                 if (git_config_bool(var, value))
1022                         allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1023                 else
1024                         allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
1025         } else if (!strcmp("uploadpack.keepalive", var)) {
1026                 keepalive = git_config_int(var, value);
1027                 if (!keepalive)
1028                         keepalive = -1;
1029         } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1030                 if (!strcmp("uploadpack.packobjectshook", var))
1031                         return git_config_string(&pack_objects_hook, var, value);
1032         } else if (!strcmp("uploadpack.allowfilter", var)) {
1033                 allow_filter = git_config_bool(var, value);
1034         } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1035                 allow_ref_in_want = git_config_bool(var, value);
1036         }
1037         return parse_hide_refs_config(var, value, "uploadpack");
1038 }
1039
1040 void upload_pack(struct upload_pack_options *options)
1041 {
1042         struct string_list symref = STRING_LIST_INIT_DUP;
1043
1044         stateless_rpc = options->stateless_rpc;
1045         timeout = options->timeout;
1046         daemon_mode = options->daemon_mode;
1047
1048         git_config(upload_pack_config, NULL);
1049
1050         head_ref_namespaced(find_symref, &symref);
1051
1052         if (options->advertise_refs || !stateless_rpc) {
1053                 reset_timeout();
1054                 head_ref_namespaced(send_ref, &symref);
1055                 for_each_namespaced_ref(send_ref, &symref);
1056                 advertise_shallow_grafts(1);
1057                 packet_flush(1);
1058         } else {
1059                 head_ref_namespaced(check_ref, NULL);
1060                 for_each_namespaced_ref(check_ref, NULL);
1061         }
1062         string_list_clear(&symref, 1);
1063         if (options->advertise_refs)
1064                 return;
1065
1066         receive_needs();
1067         if (want_obj.nr) {
1068                 get_common_commits();
1069                 create_pack_file();
1070         }
1071 }
1072
1073 struct upload_pack_data {
1074         struct object_array wants;
1075         struct string_list wanted_refs;
1076         struct oid_array haves;
1077
1078         struct object_array shallows;
1079         struct string_list deepen_not;
1080         int depth;
1081         timestamp_t deepen_since;
1082         int deepen_rev_list;
1083         int deepen_relative;
1084
1085         unsigned stateless_rpc : 1;
1086
1087         unsigned use_thin_pack : 1;
1088         unsigned use_ofs_delta : 1;
1089         unsigned no_progress : 1;
1090         unsigned use_include_tag : 1;
1091         unsigned done : 1;
1092 };
1093
1094 static void upload_pack_data_init(struct upload_pack_data *data)
1095 {
1096         struct object_array wants = OBJECT_ARRAY_INIT;
1097         struct string_list wanted_refs = STRING_LIST_INIT_DUP;
1098         struct oid_array haves = OID_ARRAY_INIT;
1099         struct object_array shallows = OBJECT_ARRAY_INIT;
1100         struct string_list deepen_not = STRING_LIST_INIT_DUP;
1101
1102         memset(data, 0, sizeof(*data));
1103         data->wants = wants;
1104         data->wanted_refs = wanted_refs;
1105         data->haves = haves;
1106         data->shallows = shallows;
1107         data->deepen_not = deepen_not;
1108 }
1109
1110 static void upload_pack_data_clear(struct upload_pack_data *data)
1111 {
1112         object_array_clear(&data->wants);
1113         string_list_clear(&data->wanted_refs, 1);
1114         oid_array_clear(&data->haves);
1115         object_array_clear(&data->shallows);
1116         string_list_clear(&data->deepen_not, 0);
1117 }
1118
1119 static int parse_want(const char *line)
1120 {
1121         const char *arg;
1122         if (skip_prefix(line, "want ", &arg)) {
1123                 struct object_id oid;
1124                 struct object *o;
1125
1126                 if (get_oid_hex(arg, &oid))
1127                         die("git upload-pack: protocol error, "
1128                             "expected to get oid, not '%s'", line);
1129
1130                 o = parse_object(the_repository, &oid);
1131                 if (!o) {
1132                         packet_write_fmt(1,
1133                                          "ERR upload-pack: not our ref %s",
1134                                          oid_to_hex(&oid));
1135                         die("git upload-pack: not our ref %s",
1136                             oid_to_hex(&oid));
1137                 }
1138
1139                 if (!(o->flags & WANTED)) {
1140                         o->flags |= WANTED;
1141                         add_object_array(o, NULL, &want_obj);
1142                 }
1143
1144                 return 1;
1145         }
1146
1147         return 0;
1148 }
1149
1150 static int parse_want_ref(const char *line, struct string_list *wanted_refs)
1151 {
1152         const char *arg;
1153         if (skip_prefix(line, "want-ref ", &arg)) {
1154                 struct object_id oid;
1155                 struct string_list_item *item;
1156                 struct object *o;
1157
1158                 if (read_ref(arg, &oid)) {
1159                         packet_write_fmt(1, "ERR unknown ref %s", arg);
1160                         die("unknown ref %s", arg);
1161                 }
1162
1163                 item = string_list_append(wanted_refs, arg);
1164                 item->util = oiddup(&oid);
1165
1166                 o = parse_object_or_die(&oid, arg);
1167                 if (!(o->flags & WANTED)) {
1168                         o->flags |= WANTED;
1169                         add_object_array(o, NULL, &want_obj);
1170                 }
1171
1172                 return 1;
1173         }
1174
1175         return 0;
1176 }
1177
1178 static int parse_have(const char *line, struct oid_array *haves)
1179 {
1180         const char *arg;
1181         if (skip_prefix(line, "have ", &arg)) {
1182                 struct object_id oid;
1183
1184                 if (get_oid_hex(arg, &oid))
1185                         die("git upload-pack: expected SHA1 object, got '%s'", arg);
1186                 oid_array_append(haves, &oid);
1187                 return 1;
1188         }
1189
1190         return 0;
1191 }
1192
1193 static void process_args(struct packet_reader *request,
1194                          struct upload_pack_data *data)
1195 {
1196         while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1197                 const char *arg = request->line;
1198                 const char *p;
1199
1200                 /* process want */
1201                 if (parse_want(arg))
1202                         continue;
1203                 if (allow_ref_in_want && parse_want_ref(arg, &data->wanted_refs))
1204                         continue;
1205                 /* process have line */
1206                 if (parse_have(arg, &data->haves))
1207                         continue;
1208
1209                 /* process args like thin-pack */
1210                 if (!strcmp(arg, "thin-pack")) {
1211                         use_thin_pack = 1;
1212                         continue;
1213                 }
1214                 if (!strcmp(arg, "ofs-delta")) {
1215                         use_ofs_delta = 1;
1216                         continue;
1217                 }
1218                 if (!strcmp(arg, "no-progress")) {
1219                         no_progress = 1;
1220                         continue;
1221                 }
1222                 if (!strcmp(arg, "include-tag")) {
1223                         use_include_tag = 1;
1224                         continue;
1225                 }
1226                 if (!strcmp(arg, "done")) {
1227                         data->done = 1;
1228                         continue;
1229                 }
1230
1231                 /* Shallow related arguments */
1232                 if (process_shallow(arg, &data->shallows))
1233                         continue;
1234                 if (process_deepen(arg, &data->depth))
1235                         continue;
1236                 if (process_deepen_since(arg, &data->deepen_since,
1237                                          &data->deepen_rev_list))
1238                         continue;
1239                 if (process_deepen_not(arg, &data->deepen_not,
1240                                        &data->deepen_rev_list))
1241                         continue;
1242                 if (!strcmp(arg, "deepen-relative")) {
1243                         data->deepen_relative = 1;
1244                         continue;
1245                 }
1246
1247                 if (allow_filter && skip_prefix(arg, "filter ", &p)) {
1248                         parse_list_objects_filter(&filter_options, p);
1249                         continue;
1250                 }
1251
1252                 /* ignore unknown lines maybe? */
1253                 die("unexpected line: '%s'", arg);
1254         }
1255 }
1256
1257 static int process_haves(struct oid_array *haves, struct oid_array *common)
1258 {
1259         int i;
1260
1261         /* Process haves */
1262         for (i = 0; i < haves->nr; i++) {
1263                 const struct object_id *oid = &haves->oid[i];
1264                 struct object *o;
1265                 int we_knew_they_have = 0;
1266
1267                 if (!has_object_file(oid))
1268                         continue;
1269
1270                 oid_array_append(common, oid);
1271
1272                 o = parse_object(the_repository, oid);
1273                 if (!o)
1274                         die("oops (%s)", oid_to_hex(oid));
1275                 if (o->type == OBJ_COMMIT) {
1276                         struct commit_list *parents;
1277                         struct commit *commit = (struct commit *)o;
1278                         if (o->flags & THEY_HAVE)
1279                                 we_knew_they_have = 1;
1280                         else
1281                                 o->flags |= THEY_HAVE;
1282                         if (!oldest_have || (commit->date < oldest_have))
1283                                 oldest_have = commit->date;
1284                         for (parents = commit->parents;
1285                              parents;
1286                              parents = parents->next)
1287                                 parents->item->object.flags |= THEY_HAVE;
1288                 }
1289                 if (!we_knew_they_have)
1290                         add_object_array(o, NULL, &have_obj);
1291         }
1292
1293         return 0;
1294 }
1295
1296 static int send_acks(struct oid_array *acks, struct strbuf *response)
1297 {
1298         int i;
1299
1300         packet_buf_write(response, "acknowledgments\n");
1301
1302         /* Send Acks */
1303         if (!acks->nr)
1304                 packet_buf_write(response, "NAK\n");
1305
1306         for (i = 0; i < acks->nr; i++) {
1307                 packet_buf_write(response, "ACK %s\n",
1308                                  oid_to_hex(&acks->oid[i]));
1309         }
1310
1311         if (ok_to_give_up()) {
1312                 /* Send Ready */
1313                 packet_buf_write(response, "ready\n");
1314                 return 1;
1315         }
1316
1317         return 0;
1318 }
1319
1320 static int process_haves_and_send_acks(struct upload_pack_data *data)
1321 {
1322         struct oid_array common = OID_ARRAY_INIT;
1323         struct strbuf response = STRBUF_INIT;
1324         int ret = 0;
1325
1326         process_haves(&data->haves, &common);
1327         if (data->done) {
1328                 ret = 1;
1329         } else if (send_acks(&common, &response)) {
1330                 packet_buf_delim(&response);
1331                 ret = 1;
1332         } else {
1333                 /* Add Flush */
1334                 packet_buf_flush(&response);
1335                 ret = 0;
1336         }
1337
1338         /* Send response */
1339         write_or_die(1, response.buf, response.len);
1340         strbuf_release(&response);
1341
1342         oid_array_clear(&data->haves);
1343         oid_array_clear(&common);
1344         return ret;
1345 }
1346
1347 static void send_wanted_ref_info(struct upload_pack_data *data)
1348 {
1349         const struct string_list_item *item;
1350
1351         if (!data->wanted_refs.nr)
1352                 return;
1353
1354         packet_write_fmt(1, "wanted-refs\n");
1355
1356         for_each_string_list_item(item, &data->wanted_refs) {
1357                 packet_write_fmt(1, "%s %s\n",
1358                                  oid_to_hex(item->util),
1359                                  item->string);
1360         }
1361
1362         packet_delim(1);
1363 }
1364
1365 static void send_shallow_info(struct upload_pack_data *data)
1366 {
1367         /* No shallow info needs to be sent */
1368         if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1369             !is_repository_shallow(the_repository))
1370                 return;
1371
1372         packet_write_fmt(1, "shallow-info\n");
1373
1374         if (!send_shallow_list(data->depth, data->deepen_rev_list,
1375                                data->deepen_since, &data->deepen_not,
1376                                &data->shallows) &&
1377             is_repository_shallow(the_repository))
1378                 deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows);
1379
1380         packet_delim(1);
1381 }
1382
1383 enum fetch_state {
1384         FETCH_PROCESS_ARGS = 0,
1385         FETCH_SEND_ACKS,
1386         FETCH_SEND_PACK,
1387         FETCH_DONE,
1388 };
1389
1390 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1391                    struct packet_reader *request)
1392 {
1393         enum fetch_state state = FETCH_PROCESS_ARGS;
1394         struct upload_pack_data data;
1395
1396         git_config(upload_pack_config, NULL);
1397
1398         upload_pack_data_init(&data);
1399         use_sideband = LARGE_PACKET_MAX;
1400
1401         while (state != FETCH_DONE) {
1402                 switch (state) {
1403                 case FETCH_PROCESS_ARGS:
1404                         process_args(request, &data);
1405
1406                         if (!want_obj.nr) {
1407                                 /*
1408                                  * Request didn't contain any 'want' lines,
1409                                  * guess they didn't want anything.
1410                                  */
1411                                 state = FETCH_DONE;
1412                         } else if (data.haves.nr) {
1413                                 /*
1414                                  * Request had 'have' lines, so lets ACK them.
1415                                  */
1416                                 state = FETCH_SEND_ACKS;
1417                         } else {
1418                                 /*
1419                                  * Request had 'want's but no 'have's so we can
1420                                  * immedietly go to construct and send a pack.
1421                                  */
1422                                 state = FETCH_SEND_PACK;
1423                         }
1424                         break;
1425                 case FETCH_SEND_ACKS:
1426                         if (process_haves_and_send_acks(&data))
1427                                 state = FETCH_SEND_PACK;
1428                         else
1429                                 state = FETCH_DONE;
1430                         break;
1431                 case FETCH_SEND_PACK:
1432                         send_wanted_ref_info(&data);
1433                         send_shallow_info(&data);
1434
1435                         packet_write_fmt(1, "packfile\n");
1436                         create_pack_file();
1437                         state = FETCH_DONE;
1438                         break;
1439                 case FETCH_DONE:
1440                         continue;
1441                 }
1442         }
1443
1444         upload_pack_data_clear(&data);
1445         return 0;
1446 }
1447
1448 int upload_pack_advertise(struct repository *r,
1449                           struct strbuf *value)
1450 {
1451         if (value) {
1452                 int allow_filter_value;
1453                 int allow_ref_in_want;
1454
1455                 strbuf_addstr(value, "shallow");
1456
1457                 if (!repo_config_get_bool(the_repository,
1458                                          "uploadpack.allowfilter",
1459                                          &allow_filter_value) &&
1460                     allow_filter_value)
1461                         strbuf_addstr(value, " filter");
1462
1463                 if (!repo_config_get_bool(the_repository,
1464                                          "uploadpack.allowrefinwant",
1465                                          &allow_ref_in_want) &&
1466                     allow_ref_in_want)
1467                         strbuf_addstr(value, " ref-in-want");
1468         }
1469
1470         return 1;
1471 }