Add stateless RPC options to upload-pack, receive-pack
[git] / upload-pack.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "pkt-line.h"
4 #include "sideband.h"
5 #include "tag.h"
6 #include "object.h"
7 #include "commit.h"
8 #include "exec_cmd.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "list-objects.h"
12 #include "run-command.h"
13
14 static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=nn] <dir>";
15
16 /* bits #0..7 in revision.h, #8..10 in commit.c */
17 #define THEY_HAVE       (1u << 11)
18 #define OUR_REF         (1u << 12)
19 #define WANTED          (1u << 13)
20 #define COMMON_KNOWN    (1u << 14)
21 #define REACHABLE       (1u << 15)
22
23 #define SHALLOW         (1u << 16)
24 #define NOT_SHALLOW     (1u << 17)
25 #define CLIENT_SHALLOW  (1u << 18)
26
27 static unsigned long oldest_have;
28
29 static int multi_ack, nr_our_refs;
30 static int use_thin_pack, use_ofs_delta, use_include_tag;
31 static int no_progress, daemon_mode;
32 static int shallow_nr;
33 static struct object_array have_obj;
34 static struct object_array want_obj;
35 static struct object_array extra_edge_obj;
36 static unsigned int timeout;
37 /* 0 for no sideband,
38  * otherwise maximum packet size (up to 65520 bytes).
39  */
40 static int use_sideband;
41 static int debug_fd;
42 static int advertise_refs;
43 static int stateless_rpc;
44
45 static void reset_timeout(void)
46 {
47         alarm(timeout);
48 }
49
50 static int strip(char *line, int len)
51 {
52         if (len && line[len-1] == '\n')
53                 line[--len] = 0;
54         return len;
55 }
56
57 static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
58 {
59         if (use_sideband)
60                 return send_sideband(1, fd, data, sz, use_sideband);
61         if (fd == 3)
62                 /* emergency quit */
63                 fd = 2;
64         if (fd == 2) {
65                 /* XXX: are we happy to lose stuff here? */
66                 xwrite(fd, data, sz);
67                 return sz;
68         }
69         return safe_write(fd, data, sz);
70 }
71
72 static FILE *pack_pipe = NULL;
73 static void show_commit(struct commit *commit, void *data)
74 {
75         if (commit->object.flags & BOUNDARY)
76                 fputc('-', pack_pipe);
77         if (fputs(sha1_to_hex(commit->object.sha1), pack_pipe) < 0)
78                 die("broken output pipe");
79         fputc('\n', pack_pipe);
80         fflush(pack_pipe);
81         free(commit->buffer);
82         commit->buffer = NULL;
83 }
84
85 static void show_object(struct object *obj, const struct name_path *path, const char *component)
86 {
87         /* An object with name "foo\n0000000..." can be used to
88          * confuse downstream git-pack-objects very badly.
89          */
90         const char *name = path_name(path, component);
91         const char *ep = strchr(name, '\n');
92         if (ep) {
93                 fprintf(pack_pipe, "%s %.*s\n", sha1_to_hex(obj->sha1),
94                        (int) (ep - name),
95                        name);
96         }
97         else
98                 fprintf(pack_pipe, "%s %s\n",
99                                 sha1_to_hex(obj->sha1), name);
100         free((char *)name);
101 }
102
103 static void show_edge(struct commit *commit)
104 {
105         fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1));
106 }
107
108 static int do_rev_list(int fd, void *create_full_pack)
109 {
110         int i;
111         struct rev_info revs;
112
113         pack_pipe = xfdopen(fd, "w");
114         init_revisions(&revs, NULL);
115         revs.tag_objects = 1;
116         revs.tree_objects = 1;
117         revs.blob_objects = 1;
118         if (use_thin_pack)
119                 revs.edge_hint = 1;
120
121         if (create_full_pack) {
122                 const char *args[] = {"rev-list", "--all", NULL};
123                 setup_revisions(2, args, &revs, NULL);
124         } else {
125                 for (i = 0; i < want_obj.nr; i++) {
126                         struct object *o = want_obj.objects[i].item;
127                         /* why??? */
128                         o->flags &= ~UNINTERESTING;
129                         add_pending_object(&revs, o, NULL);
130                 }
131                 for (i = 0; i < have_obj.nr; i++) {
132                         struct object *o = have_obj.objects[i].item;
133                         o->flags |= UNINTERESTING;
134                         add_pending_object(&revs, o, NULL);
135                 }
136                 setup_revisions(0, NULL, &revs, NULL);
137         }
138         if (prepare_revision_walk(&revs))
139                 die("revision walk setup failed");
140         mark_edges_uninteresting(revs.commits, &revs, show_edge);
141         if (use_thin_pack)
142                 for (i = 0; i < extra_edge_obj.nr; i++)
143                         fprintf(pack_pipe, "-%s\n", sha1_to_hex(
144                                         extra_edge_obj.objects[i].item->sha1));
145         traverse_commit_list(&revs, show_commit, show_object, NULL);
146         fflush(pack_pipe);
147         fclose(pack_pipe);
148         return 0;
149 }
150
151 static int feed_msg_to_hook(int fd, const char *fmt, ...)
152 {
153         int cnt;
154         char buf[1024];
155         va_list params;
156
157         va_start(params, fmt);
158         cnt = vsprintf(buf, fmt, params);
159         va_end(params);
160         return write_in_full(fd, buf, cnt) != cnt;
161 }
162
163 static int feed_obj_to_hook(const char *label, struct object_array *oa, int i, int fd)
164 {
165         return feed_msg_to_hook(fd, "%s %s\n", label,
166                                 sha1_to_hex(oa->objects[i].item->sha1));
167 }
168
169 static int run_post_upload_pack_hook(size_t total, struct timeval *tv)
170 {
171         const char *argv[2];
172         struct child_process proc;
173         int err, i;
174
175         argv[0] = "hooks/post-upload-pack";
176         argv[1] = NULL;
177
178         if (access(argv[0], X_OK) < 0)
179                 return 0;
180
181         memset(&proc, 0, sizeof(proc));
182         proc.argv = argv;
183         proc.in = -1;
184         proc.stdout_to_stderr = 1;
185         err = start_command(&proc);
186         if (err)
187                 return err;
188         for (i = 0; !err && i < want_obj.nr; i++)
189                 err |= feed_obj_to_hook("want", &want_obj, i, proc.in);
190         for (i = 0; !err && i < have_obj.nr; i++)
191                 err |= feed_obj_to_hook("have", &have_obj, i, proc.in);
192         if (!err)
193                 err |= feed_msg_to_hook(proc.in, "time %ld.%06ld\n",
194                                         (long)tv->tv_sec, (long)tv->tv_usec);
195         if (!err)
196                 err |= feed_msg_to_hook(proc.in, "size %ld\n", (long)total);
197         if (!err)
198                 err |= feed_msg_to_hook(proc.in, "kind %s\n",
199                                         (nr_our_refs == want_obj.nr && !have_obj.nr)
200                                         ? "clone" : "fetch");
201         if (close(proc.in))
202                 err = 1;
203         if (finish_command(&proc))
204                 err = 1;
205         return err;
206 }
207
208 static void create_pack_file(void)
209 {
210         struct timeval start_tv, tv;
211         struct async rev_list;
212         struct child_process pack_objects;
213         int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr);
214         char data[8193], progress[128];
215         char abort_msg[] = "aborting due to possible repository "
216                 "corruption on the remote side.";
217         int buffered = -1;
218         ssize_t sz, total_sz;
219         const char *argv[10];
220         int arg = 0;
221
222         gettimeofday(&start_tv, NULL);
223         total_sz = 0;
224         if (shallow_nr) {
225                 rev_list.proc = do_rev_list;
226                 rev_list.data = 0;
227                 if (start_async(&rev_list))
228                         die("git upload-pack: unable to fork git-rev-list");
229                 argv[arg++] = "pack-objects";
230         } else {
231                 argv[arg++] = "pack-objects";
232                 argv[arg++] = "--revs";
233                 if (create_full_pack)
234                         argv[arg++] = "--all";
235                 else if (use_thin_pack)
236                         argv[arg++] = "--thin";
237         }
238
239         argv[arg++] = "--stdout";
240         if (!no_progress)
241                 argv[arg++] = "--progress";
242         if (use_ofs_delta)
243                 argv[arg++] = "--delta-base-offset";
244         if (use_include_tag)
245                 argv[arg++] = "--include-tag";
246         argv[arg++] = NULL;
247
248         memset(&pack_objects, 0, sizeof(pack_objects));
249         pack_objects.in = shallow_nr ? rev_list.out : -1;
250         pack_objects.out = -1;
251         pack_objects.err = -1;
252         pack_objects.git_cmd = 1;
253         pack_objects.argv = argv;
254
255         if (start_command(&pack_objects))
256                 die("git upload-pack: unable to fork git-pack-objects");
257
258         /* pass on revisions we (don't) want */
259         if (!shallow_nr) {
260                 FILE *pipe_fd = xfdopen(pack_objects.in, "w");
261                 if (!create_full_pack) {
262                         int i;
263                         for (i = 0; i < want_obj.nr; i++)
264                                 fprintf(pipe_fd, "%s\n", sha1_to_hex(want_obj.objects[i].item->sha1));
265                         fprintf(pipe_fd, "--not\n");
266                         for (i = 0; i < have_obj.nr; i++)
267                                 fprintf(pipe_fd, "%s\n", sha1_to_hex(have_obj.objects[i].item->sha1));
268                 }
269
270                 fprintf(pipe_fd, "\n");
271                 fflush(pipe_fd);
272                 fclose(pipe_fd);
273         }
274
275
276         /* We read from pack_objects.err to capture stderr output for
277          * progress bar, and pack_objects.out to capture the pack data.
278          */
279
280         while (1) {
281                 struct pollfd pfd[2];
282                 int pe, pu, pollsize;
283
284                 reset_timeout();
285
286                 pollsize = 0;
287                 pe = pu = -1;
288
289                 if (0 <= pack_objects.out) {
290                         pfd[pollsize].fd = pack_objects.out;
291                         pfd[pollsize].events = POLLIN;
292                         pu = pollsize;
293                         pollsize++;
294                 }
295                 if (0 <= pack_objects.err) {
296                         pfd[pollsize].fd = pack_objects.err;
297                         pfd[pollsize].events = POLLIN;
298                         pe = pollsize;
299                         pollsize++;
300                 }
301
302                 if (!pollsize)
303                         break;
304
305                 if (poll(pfd, pollsize, -1) < 0) {
306                         if (errno != EINTR) {
307                                 error("poll failed, resuming: %s",
308                                       strerror(errno));
309                                 sleep(1);
310                         }
311                         continue;
312                 }
313                 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
314                         /* Data ready; we keep the last byte to ourselves
315                          * in case we detect broken rev-list, so that we
316                          * can leave the stream corrupted.  This is
317                          * unfortunate -- unpack-objects would happily
318                          * accept a valid packdata with trailing garbage,
319                          * so appending garbage after we pass all the
320                          * pack data is not good enough to signal
321                          * breakage to downstream.
322                          */
323                         char *cp = data;
324                         ssize_t outsz = 0;
325                         if (0 <= buffered) {
326                                 *cp++ = buffered;
327                                 outsz++;
328                         }
329                         sz = xread(pack_objects.out, cp,
330                                   sizeof(data) - outsz);
331                         if (0 < sz)
332                                 total_sz += sz;
333                         else if (sz == 0) {
334                                 close(pack_objects.out);
335                                 pack_objects.out = -1;
336                         }
337                         else
338                                 goto fail;
339                         sz += outsz;
340                         if (1 < sz) {
341                                 buffered = data[sz-1] & 0xFF;
342                                 sz--;
343                         }
344                         else
345                                 buffered = -1;
346                         sz = send_client_data(1, data, sz);
347                         if (sz < 0)
348                                 goto fail;
349                 }
350                 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
351                         /* Status ready; we ship that in the side-band
352                          * or dump to the standard error.
353                          */
354                         sz = xread(pack_objects.err, progress,
355                                   sizeof(progress));
356                         if (0 < sz)
357                                 send_client_data(2, progress, sz);
358                         else if (sz == 0) {
359                                 close(pack_objects.err);
360                                 pack_objects.err = -1;
361                         }
362                         else
363                                 goto fail;
364                 }
365         }
366
367         if (finish_command(&pack_objects)) {
368                 error("git upload-pack: git-pack-objects died with error.");
369                 goto fail;
370         }
371         if (shallow_nr && finish_async(&rev_list))
372                 goto fail;      /* error was already reported */
373
374         /* flush the data */
375         if (0 <= buffered) {
376                 data[0] = buffered;
377                 sz = send_client_data(1, data, 1);
378                 if (sz < 0)
379                         goto fail;
380                 fprintf(stderr, "flushed.\n");
381         }
382         if (use_sideband)
383                 packet_flush(1);
384
385         gettimeofday(&tv, NULL);
386         tv.tv_sec -= start_tv.tv_sec;
387         if (tv.tv_usec < start_tv.tv_usec) {
388                 tv.tv_sec--;
389                 tv.tv_usec += 1000000;
390         }
391         tv.tv_usec -= start_tv.tv_usec;
392         if (run_post_upload_pack_hook(total_sz, &tv))
393                 warning("post-upload-hook failed");
394         return;
395
396  fail:
397         send_client_data(3, abort_msg, sizeof(abort_msg));
398         die("git upload-pack: %s", abort_msg);
399 }
400
401 static int got_sha1(char *hex, unsigned char *sha1)
402 {
403         struct object *o;
404         int we_knew_they_have = 0;
405
406         if (get_sha1_hex(hex, sha1))
407                 die("git upload-pack: expected SHA1 object, got '%s'", hex);
408         if (!has_sha1_file(sha1))
409                 return -1;
410
411         o = lookup_object(sha1);
412         if (!(o && o->parsed))
413                 o = parse_object(sha1);
414         if (!o)
415                 die("oops (%s)", sha1_to_hex(sha1));
416         if (o->type == OBJ_COMMIT) {
417                 struct commit_list *parents;
418                 struct commit *commit = (struct commit *)o;
419                 if (o->flags & THEY_HAVE)
420                         we_knew_they_have = 1;
421                 else
422                         o->flags |= THEY_HAVE;
423                 if (!oldest_have || (commit->date < oldest_have))
424                         oldest_have = commit->date;
425                 for (parents = commit->parents;
426                      parents;
427                      parents = parents->next)
428                         parents->item->object.flags |= THEY_HAVE;
429         }
430         if (!we_knew_they_have) {
431                 add_object_array(o, NULL, &have_obj);
432                 return 1;
433         }
434         return 0;
435 }
436
437 static int reachable(struct commit *want)
438 {
439         struct commit_list *work = NULL;
440
441         insert_by_date(want, &work);
442         while (work) {
443                 struct commit_list *list = work->next;
444                 struct commit *commit = work->item;
445                 free(work);
446                 work = list;
447
448                 if (commit->object.flags & THEY_HAVE) {
449                         want->object.flags |= COMMON_KNOWN;
450                         break;
451                 }
452                 if (!commit->object.parsed)
453                         parse_object(commit->object.sha1);
454                 if (commit->object.flags & REACHABLE)
455                         continue;
456                 commit->object.flags |= REACHABLE;
457                 if (commit->date < oldest_have)
458                         continue;
459                 for (list = commit->parents; list; list = list->next) {
460                         struct commit *parent = list->item;
461                         if (!(parent->object.flags & REACHABLE))
462                                 insert_by_date(parent, &work);
463                 }
464         }
465         want->object.flags |= REACHABLE;
466         clear_commit_marks(want, REACHABLE);
467         free_commit_list(work);
468         return (want->object.flags & COMMON_KNOWN);
469 }
470
471 static int ok_to_give_up(void)
472 {
473         int i;
474
475         if (!have_obj.nr)
476                 return 0;
477
478         for (i = 0; i < want_obj.nr; i++) {
479                 struct object *want = want_obj.objects[i].item;
480
481                 if (want->flags & COMMON_KNOWN)
482                         continue;
483                 want = deref_tag(want, "a want line", 0);
484                 if (!want || want->type != OBJ_COMMIT) {
485                         /* no way to tell if this is reachable by
486                          * looking at the ancestry chain alone, so
487                          * leave a note to ourselves not to worry about
488                          * this object anymore.
489                          */
490                         want_obj.objects[i].item->flags |= COMMON_KNOWN;
491                         continue;
492                 }
493                 if (!reachable((struct commit *)want))
494                         return 0;
495         }
496         return 1;
497 }
498
499 static int get_common_commits(void)
500 {
501         static char line[1000];
502         unsigned char sha1[20];
503         char last_hex[41];
504
505         save_commit_buffer = 0;
506
507         for (;;) {
508                 int len = packet_read_line(0, line, sizeof(line));
509                 reset_timeout();
510
511                 if (!len) {
512                         if (have_obj.nr == 0 || multi_ack)
513                                 packet_write(1, "NAK\n");
514                         if (stateless_rpc)
515                                 exit(0);
516                         continue;
517                 }
518                 strip(line, len);
519                 if (!prefixcmp(line, "have ")) {
520                         switch (got_sha1(line+5, sha1)) {
521                         case -1: /* they have what we do not */
522                                 if (multi_ack && ok_to_give_up()) {
523                                         const char *hex = sha1_to_hex(sha1);
524                                         if (multi_ack == 2)
525                                                 packet_write(1, "ACK %s ready\n", hex);
526                                         else
527                                                 packet_write(1, "ACK %s continue\n", hex);
528                                 }
529                                 break;
530                         default:
531                                 memcpy(last_hex, sha1_to_hex(sha1), 41);
532                                 if (multi_ack == 2)
533                                         packet_write(1, "ACK %s common\n", last_hex);
534                                 else if (multi_ack)
535                                         packet_write(1, "ACK %s continue\n", last_hex);
536                                 else if (have_obj.nr == 1)
537                                         packet_write(1, "ACK %s\n", last_hex);
538                                 break;
539                         }
540                         continue;
541                 }
542                 if (!strcmp(line, "done")) {
543                         if (have_obj.nr > 0) {
544                                 if (multi_ack)
545                                         packet_write(1, "ACK %s\n", last_hex);
546                                 return 0;
547                         }
548                         packet_write(1, "NAK\n");
549                         return -1;
550                 }
551                 die("git upload-pack: expected SHA1 list, got '%s'", line);
552         }
553 }
554
555 static void receive_needs(void)
556 {
557         struct object_array shallows = {0, 0, NULL};
558         static char line[1000];
559         int len, depth = 0;
560
561         shallow_nr = 0;
562         if (debug_fd)
563                 write_str_in_full(debug_fd, "#S\n");
564         for (;;) {
565                 struct object *o;
566                 unsigned char sha1_buf[20];
567                 len = packet_read_line(0, line, sizeof(line));
568                 reset_timeout();
569                 if (!len)
570                         break;
571                 if (debug_fd)
572                         write_in_full(debug_fd, line, len);
573
574                 if (!prefixcmp(line, "shallow ")) {
575                         unsigned char sha1[20];
576                         struct object *object;
577                         if (get_sha1(line + 8, sha1))
578                                 die("invalid shallow line: %s", line);
579                         object = parse_object(sha1);
580                         if (!object)
581                                 die("did not find object for %s", line);
582                         object->flags |= CLIENT_SHALLOW;
583                         add_object_array(object, NULL, &shallows);
584                         continue;
585                 }
586                 if (!prefixcmp(line, "deepen ")) {
587                         char *end;
588                         depth = strtol(line + 7, &end, 0);
589                         if (end == line + 7 || depth <= 0)
590                                 die("Invalid deepen: %s", line);
591                         continue;
592                 }
593                 if (prefixcmp(line, "want ") ||
594                     get_sha1_hex(line+5, sha1_buf))
595                         die("git upload-pack: protocol error, "
596                             "expected to get sha, not '%s'", line);
597                 if (strstr(line+45, "multi_ack_detailed"))
598                         multi_ack = 2;
599                 else if (strstr(line+45, "multi_ack"))
600                         multi_ack = 1;
601                 if (strstr(line+45, "thin-pack"))
602                         use_thin_pack = 1;
603                 if (strstr(line+45, "ofs-delta"))
604                         use_ofs_delta = 1;
605                 if (strstr(line+45, "side-band-64k"))
606                         use_sideband = LARGE_PACKET_MAX;
607                 else if (strstr(line+45, "side-band"))
608                         use_sideband = DEFAULT_PACKET_MAX;
609                 if (strstr(line+45, "no-progress"))
610                         no_progress = 1;
611                 if (strstr(line+45, "include-tag"))
612                         use_include_tag = 1;
613
614                 /* We have sent all our refs already, and the other end
615                  * should have chosen out of them; otherwise they are
616                  * asking for nonsense.
617                  *
618                  * Hmph.  We may later want to allow "want" line that
619                  * asks for something like "master~10" (symbolic)...
620                  * would it make sense?  I don't know.
621                  */
622                 o = lookup_object(sha1_buf);
623                 if (!o || !(o->flags & OUR_REF))
624                         die("git upload-pack: not our ref %s", line+5);
625                 if (!(o->flags & WANTED)) {
626                         o->flags |= WANTED;
627                         add_object_array(o, NULL, &want_obj);
628                 }
629         }
630         if (debug_fd)
631                 write_str_in_full(debug_fd, "#E\n");
632
633         if (!use_sideband && daemon_mode)
634                 no_progress = 1;
635
636         if (depth == 0 && shallows.nr == 0)
637                 return;
638         if (depth > 0) {
639                 struct commit_list *result, *backup;
640                 int i;
641                 backup = result = get_shallow_commits(&want_obj, depth,
642                         SHALLOW, NOT_SHALLOW);
643                 while (result) {
644                         struct object *object = &result->item->object;
645                         if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
646                                 packet_write(1, "shallow %s",
647                                                 sha1_to_hex(object->sha1));
648                                 register_shallow(object->sha1);
649                                 shallow_nr++;
650                         }
651                         result = result->next;
652                 }
653                 free_commit_list(backup);
654                 for (i = 0; i < shallows.nr; i++) {
655                         struct object *object = shallows.objects[i].item;
656                         if (object->flags & NOT_SHALLOW) {
657                                 struct commit_list *parents;
658                                 packet_write(1, "unshallow %s",
659                                         sha1_to_hex(object->sha1));
660                                 object->flags &= ~CLIENT_SHALLOW;
661                                 /* make sure the real parents are parsed */
662                                 unregister_shallow(object->sha1);
663                                 object->parsed = 0;
664                                 if (parse_commit((struct commit *)object))
665                                         die("invalid commit");
666                                 parents = ((struct commit *)object)->parents;
667                                 while (parents) {
668                                         add_object_array(&parents->item->object,
669                                                         NULL, &want_obj);
670                                         parents = parents->next;
671                                 }
672                                 add_object_array(object, NULL, &extra_edge_obj);
673                         }
674                         /* make sure commit traversal conforms to client */
675                         register_shallow(object->sha1);
676                 }
677                 packet_flush(1);
678         } else
679                 if (shallows.nr > 0) {
680                         int i;
681                         for (i = 0; i < shallows.nr; i++)
682                                 register_shallow(shallows.objects[i].item->sha1);
683                 }
684
685         shallow_nr += shallows.nr;
686         free(shallows.objects);
687 }
688
689 static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
690 {
691         static const char *capabilities = "multi_ack thin-pack side-band"
692                 " side-band-64k ofs-delta shallow no-progress"
693                 " include-tag multi_ack_detailed";
694         struct object *o = parse_object(sha1);
695
696         if (!o)
697                 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
698
699         if (capabilities)
700                 packet_write(1, "%s %s%c%s\n", sha1_to_hex(sha1), refname,
701                         0, capabilities);
702         else
703                 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
704         capabilities = NULL;
705         if (!(o->flags & OUR_REF)) {
706                 o->flags |= OUR_REF;
707                 nr_our_refs++;
708         }
709         if (o->type == OBJ_TAG) {
710                 o = deref_tag(o, refname, 0);
711                 if (o)
712                         packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
713         }
714         return 0;
715 }
716
717 static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
718 {
719         struct object *o = parse_object(sha1);
720         if (!o)
721                 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
722         if (!(o->flags & OUR_REF)) {
723                 o->flags |= OUR_REF;
724                 nr_our_refs++;
725         }
726         return 0;
727 }
728
729 static void upload_pack(void)
730 {
731         if (advertise_refs || !stateless_rpc) {
732                 reset_timeout();
733                 head_ref(send_ref, NULL);
734                 for_each_ref(send_ref, NULL);
735                 packet_flush(1);
736         } else {
737                 head_ref(mark_our_ref, NULL);
738                 for_each_ref(mark_our_ref, NULL);
739         }
740         if (advertise_refs)
741                 return;
742
743         receive_needs();
744         if (want_obj.nr) {
745                 get_common_commits();
746                 create_pack_file();
747         }
748 }
749
750 int main(int argc, char **argv)
751 {
752         char *dir;
753         int i;
754         int strict = 0;
755
756         git_extract_argv0_path(argv[0]);
757         read_replace_refs = 0;
758
759         for (i = 1; i < argc; i++) {
760                 char *arg = argv[i];
761
762                 if (arg[0] != '-')
763                         break;
764                 if (!strcmp(arg, "--advertise-refs")) {
765                         advertise_refs = 1;
766                         continue;
767                 }
768                 if (!strcmp(arg, "--stateless-rpc")) {
769                         stateless_rpc = 1;
770                         continue;
771                 }
772                 if (!strcmp(arg, "--strict")) {
773                         strict = 1;
774                         continue;
775                 }
776                 if (!prefixcmp(arg, "--timeout=")) {
777                         timeout = atoi(arg+10);
778                         daemon_mode = 1;
779                         continue;
780                 }
781                 if (!strcmp(arg, "--")) {
782                         i++;
783                         break;
784                 }
785         }
786
787         if (i != argc-1)
788                 usage(upload_pack_usage);
789
790         setup_path();
791
792         dir = argv[i];
793
794         if (!enter_repo(dir, strict))
795                 die("'%s' does not appear to be a git repository", dir);
796         if (is_repository_shallow())
797                 die("attempt to fetch/clone from a shallow repository");
798         if (getenv("GIT_DEBUG_SEND_PACK"))
799                 debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK"));
800         upload_pack();
801         return 0;
802 }