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=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 in, int out, void *create_full_pack)
 109 {
 110         int i;
 111         struct rev_info revs;
 112
 113         pack_pipe = xfdopen(out, "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 void create_pack_file(void)
 152 {
 153         struct async rev_list;
 154         struct child_process pack_objects;
 155         int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr);
 156         char data[8193], progress[128];
 157         char abort_msg[] = "aborting due to possible repository "
 158                 "corruption on the remote side.";
 159         int buffered = -1;
 160         ssize_t sz;
 161         const char *argv[10];
 162         int arg = 0;
 163
 164         if (shallow_nr) {
 165                 memset(&rev_list, 0, sizeof(rev_list));
 166                 rev_list.proc = do_rev_list;
 167                 rev_list.out = -1;
 168                 if (start_async(&rev_list))
 169                         die("git upload-pack: unable to fork git-rev-list");
 170                 argv[arg++] = "pack-objects";
 171         } else {
 172                 argv[arg++] = "pack-objects";
 173                 argv[arg++] = "--revs";
 174                 if (create_full_pack)
 175                         argv[arg++] = "--all";
 176                 else if (use_thin_pack)
 177                         argv[arg++] = "--thin";
 178         }
 179
 180         argv[arg++] = "--stdout";
 181         if (!no_progress)
 182                 argv[arg++] = "--progress";
 183         if (use_ofs_delta)
 184                 argv[arg++] = "--delta-base-offset";
 185         if (use_include_tag)
 186                 argv[arg++] = "--include-tag";
 187         argv[arg++] = NULL;
 188
 189         memset(&pack_objects, 0, sizeof(pack_objects));
 190         pack_objects.in = shallow_nr ? rev_list.out : -1;
 191         pack_objects.out = -1;
 192         pack_objects.err = -1;
 193         pack_objects.git_cmd = 1;
 194         pack_objects.argv = argv;
 195
 196         if (start_command(&pack_objects))
 197                 die("git upload-pack: unable to fork git-pack-objects");
 198
 199         /* pass on revisions we (don't) want */
 200         if (!shallow_nr) {
 201                 FILE *pipe_fd = xfdopen(pack_objects.in, "w");
 202                 if (!create_full_pack) {
 203                         int i;
 204                         for (i = 0; i < want_obj.nr; i++)
 205                                 fprintf(pipe_fd, "%s\n", sha1_to_hex(want_obj.objects[i].item->sha1));
 206                         fprintf(pipe_fd, "--not\n");
 207                         for (i = 0; i < have_obj.nr; i++)
 208                                 fprintf(pipe_fd, "%s\n", sha1_to_hex(have_obj.objects[i].item->sha1));
 209                 }
 210
 211                 fprintf(pipe_fd, "\n");
 212                 fflush(pipe_fd);
 213                 fclose(pipe_fd);
 214         }
 215
 216
 217         /* We read from pack_objects.err to capture stderr output for
 218          * progress bar, and pack_objects.out to capture the pack data.
 219          */
 220
 221         while (1) {
 222                 struct pollfd pfd[2];
 223                 int pe, pu, pollsize;
 224
 225                 reset_timeout();
 226
 227                 pollsize = 0;
 228                 pe = pu = -1;
 229
 230                 if (0 <= pack_objects.out) {
 231                         pfd[pollsize].fd = pack_objects.out;
 232                         pfd[pollsize].events = POLLIN;
 233                         pu = pollsize;
 234                         pollsize++;
 235                 }
 236                 if (0 <= pack_objects.err) {
 237                         pfd[pollsize].fd = pack_objects.err;
 238                         pfd[pollsize].events = POLLIN;
 239                         pe = pollsize;
 240                         pollsize++;
 241                 }
 242
 243                 if (!pollsize)
 244                         break;
 245
 246                 if (poll(pfd, pollsize, -1) < 0) {
 247                         if (errno != EINTR) {
 248                                 error("poll failed, resuming: %s",
 249                                       strerror(errno));
 250                                 sleep(1);
 251                         }
 252                         continue;
 253                 }
 254                 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
 255                         /* Status ready; we ship that in the side-band
 256                          * or dump to the standard error.
 257                          */
 258                         sz = xread(pack_objects.err, progress,
 259                                   sizeof(progress));
 260                         if (0 < sz)
 261                                 send_client_data(2, progress, sz);
 262                         else if (sz == 0) {
 263                                 close(pack_objects.err);
 264                                 pack_objects.err = -1;
 265                         }
 266                         else
 267                                 goto fail;
 268                         /* give priority to status messages */
 269                         continue;
 270                 }
 271                 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
 272                         /* Data ready; we keep the last byte to ourselves
 273                          * in case we detect broken rev-list, so that we
 274                          * can leave the stream corrupted.  This is
 275                          * unfortunate -- unpack-objects would happily
 276                          * accept a valid packdata with trailing garbage,
 277                          * so appending garbage after we pass all the
 278                          * pack data is not good enough to signal
 279                          * breakage to downstream.
 280                          */
 281                         char *cp = data;
 282                         ssize_t outsz = 0;
 283                         if (0 <= buffered) {
 284                                 *cp++ = buffered;
 285                                 outsz++;
 286                         }
 287                         sz = xread(pack_objects.out, cp,
 288                                   sizeof(data) - outsz);
 289                         if (0 < sz)
 290                                 ;
 291                         else if (sz == 0) {
 292                                 close(pack_objects.out);
 293                                 pack_objects.out = -1;
 294                         }
 295                         else
 296                                 goto fail;
 297                         sz += outsz;
 298                         if (1 < sz) {
 299                                 buffered = data[sz-1] & 0xFF;
 300                                 sz--;
 301                         }
 302                         else
 303                                 buffered = -1;
 304                         sz = send_client_data(1, data, sz);
 305                         if (sz < 0)
 306                                 goto fail;
 307                 }
 308         }
 309
 310         if (finish_command(&pack_objects)) {
 311                 error("git upload-pack: git-pack-objects died with error.");
 312                 goto fail;
 313         }
 314         if (shallow_nr && finish_async(&rev_list))
 315                 goto fail;      /* error was already reported */
 316
 317         /* flush the data */
 318         if (0 <= buffered) {
 319                 data[0] = buffered;
 320                 sz = send_client_data(1, data, 1);
 321                 if (sz < 0)
 322                         goto fail;
 323                 fprintf(stderr, "flushed.\n");
 324         }
 325         if (use_sideband)
 326                 packet_flush(1);
 327         return;
 328
 329  fail:
 330         send_client_data(3, abort_msg, sizeof(abort_msg));
 331         die("git upload-pack: %s", abort_msg);
 332 }
 333
 334 static int got_sha1(char *hex, unsigned char *sha1)
 335 {
 336         struct object *o;
 337         int we_knew_they_have = 0;
 338
 339         if (get_sha1_hex(hex, sha1))
 340                 die("git upload-pack: expected SHA1 object, got '%s'", hex);
 341         if (!has_sha1_file(sha1))
 342                 return -1;
 343
 344         o = lookup_object(sha1);
 345         if (!(o && o->parsed))
 346                 o = parse_object(sha1);
 347         if (!o)
 348                 die("oops (%s)", sha1_to_hex(sha1));
 349         if (o->type == OBJ_COMMIT) {
 350                 struct commit_list *parents;
 351                 struct commit *commit = (struct commit *)o;
 352                 if (o->flags & THEY_HAVE)
 353                         we_knew_they_have = 1;
 354                 else
 355                         o->flags |= THEY_HAVE;
 356                 if (!oldest_have || (commit->date < oldest_have))
 357                         oldest_have = commit->date;
 358                 for (parents = commit->parents;
 359                      parents;
 360                      parents = parents->next)
 361                         parents->item->object.flags |= THEY_HAVE;
 362         }
 363         if (!we_knew_they_have) {
 364                 add_object_array(o, NULL, &have_obj);
 365                 return 1;
 366         }
 367         return 0;
 368 }
 369
 370 static int reachable(struct commit *want)
 371 {
 372         struct commit_list *work = NULL;
 373
 374         insert_by_date(want, &work);
 375         while (work) {
 376                 struct commit_list *list = work->next;
 377                 struct commit *commit = work->item;
 378                 free(work);
 379                 work = list;
 380
 381                 if (commit->object.flags & THEY_HAVE) {
 382                         want->object.flags |= COMMON_KNOWN;
 383                         break;
 384                 }
 385                 if (!commit->object.parsed)
 386                         parse_object(commit->object.sha1);
 387                 if (commit->object.flags & REACHABLE)
 388                         continue;
 389                 commit->object.flags |= REACHABLE;
 390                 if (commit->date < oldest_have)
 391                         continue;
 392                 for (list = commit->parents; list; list = list->next) {
 393                         struct commit *parent = list->item;
 394                         if (!(parent->object.flags & REACHABLE))
 395                                 insert_by_date(parent, &work);
 396                 }
 397         }
 398         want->object.flags |= REACHABLE;
 399         clear_commit_marks(want, REACHABLE);
 400         free_commit_list(work);
 401         return (want->object.flags & COMMON_KNOWN);
 402 }
 403
 404 static int ok_to_give_up(void)
 405 {
 406         int i;
 407
 408         if (!have_obj.nr)
 409                 return 0;
 410
 411         for (i = 0; i < want_obj.nr; i++) {
 412                 struct object *want = want_obj.objects[i].item;
 413
 414                 if (want->flags & COMMON_KNOWN)
 415                         continue;
 416                 want = deref_tag(want, "a want line", 0);
 417                 if (!want || want->type != OBJ_COMMIT) {
 418                         /* no way to tell if this is reachable by
 419                          * looking at the ancestry chain alone, so
 420                          * leave a note to ourselves not to worry about
 421                          * this object anymore.
 422                          */
 423                         want_obj.objects[i].item->flags |= COMMON_KNOWN;
 424                         continue;
 425                 }
 426                 if (!reachable((struct commit *)want))
 427                         return 0;
 428         }
 429         return 1;
 430 }
 431
 432 static int get_common_commits(void)
 433 {
 434         static char line[1000];
 435         unsigned char sha1[20];
 436         char last_hex[41];
 437
 438         save_commit_buffer = 0;
 439
 440         for (;;) {
 441                 int len = packet_read_line(0, line, sizeof(line));
 442                 reset_timeout();
 443
 444                 if (!len) {
 445                         if (have_obj.nr == 0 || multi_ack)
 446                                 packet_write(1, "NAK\n");
 447                         if (stateless_rpc)
 448                                 exit(0);
 449                         continue;
 450                 }
 451                 strip(line, len);
 452                 if (!prefixcmp(line, "have ")) {
 453                         switch (got_sha1(line+5, sha1)) {
 454                         case -1: /* they have what we do not */
 455                                 if (multi_ack && ok_to_give_up()) {
 456                                         const char *hex = sha1_to_hex(sha1);
 457                                         if (multi_ack == 2)
 458                                                 packet_write(1, "ACK %s ready\n", hex);
 459                                         else
 460                                                 packet_write(1, "ACK %s continue\n", hex);
 461                                 }
 462                                 break;
 463                         default:
 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 = {0, 0, NULL};
 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, "thin-pack"))
 535                         use_thin_pack = 1;
 536                 if (strstr(line+45, "ofs-delta"))
 537                         use_ofs_delta = 1;
 538                 if (strstr(line+45, "side-band-64k"))
 539                         use_sideband = LARGE_PACKET_MAX;
 540                 else if (strstr(line+45, "side-band"))
 541                         use_sideband = DEFAULT_PACKET_MAX;
 542                 if (strstr(line+45, "no-progress"))
 543                         no_progress = 1;
 544                 if (strstr(line+45, "include-tag"))
 545                         use_include_tag = 1;
 546
 547                 /* We have sent all our refs already, and the other end
 548                  * should have chosen out of them; otherwise they are
 549                  * asking for nonsense.
 550                  *
 551                  * Hmph.  We may later want to allow "want" line that
 552                  * asks for something like "master~10" (symbolic)...
 553                  * would it make sense?  I don't know.
 554                  */
 555                 o = lookup_object(sha1_buf);
 556                 if (!o || !(o->flags & OUR_REF))
 557                         die("git upload-pack: not our ref %s", line+5);
 558                 if (!(o->flags & WANTED)) {
 559                         o->flags |= WANTED;
 560                         add_object_array(o, NULL, &want_obj);
 561                 }
 562         }
 563         if (debug_fd)
 564                 write_str_in_full(debug_fd, "#E\n");
 565
 566         if (!use_sideband && daemon_mode)
 567                 no_progress = 1;
 568
 569         if (depth == 0 && shallows.nr == 0)
 570                 return;
 571         if (depth > 0) {
 572                 struct commit_list *result, *backup;
 573                 int i;
 574                 backup = result = get_shallow_commits(&want_obj, depth,
 575                         SHALLOW, NOT_SHALLOW);
 576                 while (result) {
 577                         struct object *object = &result->item->object;
 578                         if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
 579                                 packet_write(1, "shallow %s",
 580                                                 sha1_to_hex(object->sha1));
 581                                 register_shallow(object->sha1);
 582                                 shallow_nr++;
 583                         }
 584                         result = result->next;
 585                 }
 586                 free_commit_list(backup);
 587                 for (i = 0; i < shallows.nr; i++) {
 588                         struct object *object = shallows.objects[i].item;
 589                         if (object->flags & NOT_SHALLOW) {
 590                                 struct commit_list *parents;
 591                                 packet_write(1, "unshallow %s",
 592                                         sha1_to_hex(object->sha1));
 593                                 object->flags &= ~CLIENT_SHALLOW;
 594                                 /* make sure the real parents are parsed */
 595                                 unregister_shallow(object->sha1);
 596                                 object->parsed = 0;
 597                                 if (parse_commit((struct commit *)object))
 598                                         die("invalid commit");
 599                                 parents = ((struct commit *)object)->parents;
 600                                 while (parents) {
 601                                         add_object_array(&parents->item->object,
 602                                                         NULL, &want_obj);
 603                                         parents = parents->next;
 604                                 }
 605                                 add_object_array(object, NULL, &extra_edge_obj);
 606                         }
 607                         /* make sure commit traversal conforms to client */
 608                         register_shallow(object->sha1);
 609                 }
 610                 packet_flush(1);
 611         } else
 612                 if (shallows.nr > 0) {
 613                         int i;
 614                         for (i = 0; i < shallows.nr; i++)
 615                                 register_shallow(shallows.objects[i].item->sha1);
 616                 }
 617
 618         shallow_nr += shallows.nr;
 619         free(shallows.objects);
 620 }
 621
 622 static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 623 {
 624         static const char *capabilities = "multi_ack thin-pack side-band"
 625                 " side-band-64k ofs-delta shallow no-progress"
 626                 " include-tag multi_ack_detailed";
 627         struct object *o = parse_object(sha1);
 628
 629         if (!o)
 630                 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
 631
 632         if (capabilities)
 633                 packet_write(1, "%s %s%c%s\n", sha1_to_hex(sha1), refname,
 634                         0, capabilities);
 635         else
 636                 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
 637         capabilities = NULL;
 638         if (!(o->flags & OUR_REF)) {
 639                 o->flags |= OUR_REF;
 640                 nr_our_refs++;
 641         }
 642         if (o->type == OBJ_TAG) {
 643                 o = deref_tag(o, refname, 0);
 644                 if (o)
 645                         packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
 646         }
 647         return 0;
 648 }
 649
 650 static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
 651 {
 652         struct object *o = parse_object(sha1);
 653         if (!o)
 654                 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
 655         if (!(o->flags & OUR_REF)) {
 656                 o->flags |= OUR_REF;
 657                 nr_our_refs++;
 658         }
 659         return 0;
 660 }
 661
 662 static void upload_pack(void)
 663 {
 664         if (advertise_refs || !stateless_rpc) {
 665                 reset_timeout();
 666                 head_ref(send_ref, NULL);
 667                 for_each_ref(send_ref, NULL);
 668                 packet_flush(1);
 669         } else {
 670                 head_ref(mark_our_ref, NULL);
 671                 for_each_ref(mark_our_ref, NULL);
 672         }
 673         if (advertise_refs)
 674                 return;
 675
 676         receive_needs();
 677         if (want_obj.nr) {
 678                 get_common_commits();
 679                 create_pack_file();
 680         }
 681 }
 682
 683 int main(int argc, char **argv)
 684 {
 685         char *dir;
 686         int i;
 687         int strict = 0;
 688
 689         git_extract_argv0_path(argv[0]);
 690         read_replace_refs = 0;
 691
 692         for (i = 1; i < argc; i++) {
 693                 char *arg = argv[i];
 694
 695                 if (arg[0] != '-')
 696                         break;
 697                 if (!strcmp(arg, "--advertise-refs")) {
 698                         advertise_refs = 1;
 699                         continue;
 700                 }
 701                 if (!strcmp(arg, "--stateless-rpc")) {
 702                         stateless_rpc = 1;
 703                         continue;
 704                 }
 705                 if (!strcmp(arg, "--strict")) {
 706                         strict = 1;
 707                         continue;
 708                 }
 709                 if (!prefixcmp(arg, "--timeout=")) {
 710                         timeout = atoi(arg+10);
 711                         daemon_mode = 1;
 712                         continue;
 713                 }
 714                 if (!strcmp(arg, "--")) {
 715                         i++;
 716                         break;
 717                 }
 718         }
 719
 720         if (i != argc-1)
 721                 usage(upload_pack_usage);
 722
 723         setup_path();
 724
 725         dir = argv[i];
 726
 727         if (!enter_repo(dir, strict))
 728                 die("'%s' does not appear to be a git repository", dir);
 729         if (is_repository_shallow())
 730                 die("attempt to fetch/clone from a shallow repository");
 731         if (getenv("GIT_DEBUG_SEND_PACK"))
 732                 debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK"));
 733         upload_pack();
 734         return 0;
 735 }