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