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