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