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