builtin-receive-pack.c

   1 #include "cache.h"
   2 #include "pack.h"
   3 #include "refs.h"
   4 #include "pkt-line.h"
   5 #include "run-command.h"
   6 #include "exec_cmd.h"
   7 #include "commit.h"
   8 #include "object.h"
   9 #include "remote.h"
  10 #include "transport.h"
  11
  12 static const char receive_pack_usage[] = "git receive-pack <git-dir>";
  13
  14 enum deny_action {
  15         DENY_UNCONFIGURED,
  16         DENY_IGNORE,
  17         DENY_WARN,
  18         DENY_REFUSE,
  19 };
  20
  21 static int deny_deletes;
  22 static int deny_non_fast_forwards;
  23 static enum deny_action deny_current_branch = DENY_UNCONFIGURED;
  24 static enum deny_action deny_delete_current = DENY_UNCONFIGURED;
  25 static int receive_fsck_objects;
  26 static int receive_unpack_limit = -1;
  27 static int transfer_unpack_limit = -1;
  28 static int unpack_limit = 100;
  29 static int report_status;
  30 static int prefer_ofs_delta = 1;
  31 static const char *head_name;
  32 static char *capabilities_to_send;
  33
  34 static enum deny_action parse_deny_action(const char *var, const char *value)
  35 {
  36         if (value) {
  37                 if (!strcasecmp(value, "ignore"))
  38                         return DENY_IGNORE;
  39                 if (!strcasecmp(value, "warn"))
  40                         return DENY_WARN;
  41                 if (!strcasecmp(value, "refuse"))
  42                         return DENY_REFUSE;
  43         }
  44         if (git_config_bool(var, value))
  45                 return DENY_REFUSE;
  46         return DENY_IGNORE;
  47 }
  48
  49 static int receive_pack_config(const char *var, const char *value, void *cb)
  50 {
  51         if (strcmp(var, "receive.denydeletes") == 0) {
  52                 deny_deletes = git_config_bool(var, value);
  53                 return 0;
  54         }
  55
  56         if (strcmp(var, "receive.denynonfastforwards") == 0) {
  57                 deny_non_fast_forwards = git_config_bool(var, value);
  58                 return 0;
  59         }
  60
  61         if (strcmp(var, "receive.unpacklimit") == 0) {
  62                 receive_unpack_limit = git_config_int(var, value);
  63                 return 0;
  64         }
  65
  66         if (strcmp(var, "transfer.unpacklimit") == 0) {
  67                 transfer_unpack_limit = git_config_int(var, value);
  68                 return 0;
  69         }
  70
  71         if (strcmp(var, "receive.fsckobjects") == 0) {
  72                 receive_fsck_objects = git_config_bool(var, value);
  73                 return 0;
  74         }
  75
  76         if (!strcmp(var, "receive.denycurrentbranch")) {
  77                 deny_current_branch = parse_deny_action(var, value);
  78                 return 0;
  79         }
  80
  81         if (strcmp(var, "receive.denydeletecurrent") == 0) {
  82                 deny_delete_current = parse_deny_action(var, value);
  83                 return 0;
  84         }
  85
  86         if (strcmp(var, "repack.usedeltabaseoffset") == 0) {
  87                 prefer_ofs_delta = git_config_bool(var, value);
  88                 return 0;
  89         }
  90
  91         return git_default_config(var, value, cb);
  92 }
  93
  94 static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
  95 {
  96         if (!capabilities_to_send)
  97                 packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
  98         else
  99                 packet_write(1, "%s %s%c%s\n",
 100                              sha1_to_hex(sha1), path, 0, capabilities_to_send);
 101         capabilities_to_send = NULL;
 102         return 0;
 103 }
 104
 105 static void write_head_info(void)
 106 {
 107         for_each_ref(show_ref, NULL);
 108         if (capabilities_to_send)
 109                 show_ref("capabilities^{}", null_sha1, 0, NULL);
 110
 111 }
 112
 113 struct command {
 114         struct command *next;
 115         const char *error_string;
 116         unsigned char old_sha1[20];
 117         unsigned char new_sha1[20];
 118         char ref_name[FLEX_ARRAY]; /* more */
 119 };
 120
 121 static struct command *commands;
 122
 123 static const char pre_receive_hook[] = "hooks/pre-receive";
 124 static const char post_receive_hook[] = "hooks/post-receive";
 125
 126 static int run_status(int code, const char *cmd_name)
 127 {
 128         switch (code) {
 129         case 0:
 130                 return 0;
 131         case -ERR_RUN_COMMAND_FORK:
 132                 return error("fork of %s failed", cmd_name);
 133         case -ERR_RUN_COMMAND_EXEC:
 134                 return error("execute of %s failed", cmd_name);
 135         case -ERR_RUN_COMMAND_PIPE:
 136                 return error("pipe failed");
 137         case -ERR_RUN_COMMAND_WAITPID:
 138                 return error("waitpid failed");
 139         case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 140                 return error("waitpid is confused");
 141         case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 142                 return error("%s died of signal", cmd_name);
 143         case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 144                 return error("%s died strangely", cmd_name);
 145         default:
 146                 error("%s exited with error code %d", cmd_name, -code);
 147                 return -code;
 148         }
 149 }
 150
 151 static int run_receive_hook(const char *hook_name)
 152 {
 153         static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
 154         struct command *cmd;
 155         struct child_process proc;
 156         const char *argv[2];
 157         int have_input = 0, code;
 158
 159         for (cmd = commands; !have_input && cmd; cmd = cmd->next) {
 160                 if (!cmd->error_string)
 161                         have_input = 1;
 162         }
 163
 164         if (!have_input || access(hook_name, X_OK) < 0)
 165                 return 0;
 166
 167         argv[0] = hook_name;
 168         argv[1] = NULL;
 169
 170         memset(&proc, 0, sizeof(proc));
 171         proc.argv = argv;
 172         proc.in = -1;
 173         proc.stdout_to_stderr = 1;
 174
 175         code = start_command(&proc);
 176         if (code)
 177                 return run_status(code, hook_name);
 178         for (cmd = commands; cmd; cmd = cmd->next) {
 179                 if (!cmd->error_string) {
 180                         size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n",
 181                                 sha1_to_hex(cmd->old_sha1),
 182                                 sha1_to_hex(cmd->new_sha1),
 183                                 cmd->ref_name);
 184                         if (write_in_full(proc.in, buf, n) != n)
 185                                 break;
 186                 }
 187         }
 188         close(proc.in);
 189         return run_status(finish_command(&proc), hook_name);
 190 }
 191
 192 static int run_update_hook(struct command *cmd)
 193 {
 194         static const char update_hook[] = "hooks/update";
 195         const char *argv[5];
 196
 197         if (access(update_hook, X_OK) < 0)
 198                 return 0;
 199
 200         argv[0] = update_hook;
 201         argv[1] = cmd->ref_name;
 202         argv[2] = sha1_to_hex(cmd->old_sha1);
 203         argv[3] = sha1_to_hex(cmd->new_sha1);
 204         argv[4] = NULL;
 205
 206         return run_status(run_command_v_opt(argv, RUN_COMMAND_NO_STDIN |
 207                                         RUN_COMMAND_STDOUT_TO_STDERR),
 208                         update_hook);
 209 }
 210
 211 static int is_ref_checked_out(const char *ref)
 212 {
 213         if (is_bare_repository())
 214                 return 0;
 215
 216         if (!head_name)
 217                 return 0;
 218         return !strcmp(head_name, ref);
 219 }
 220
 221 static char *warn_unconfigured_deny_msg[] = {
 222         "Updating the currently checked out branch may cause confusion,",
 223         "as the index and work tree do not reflect changes that are in HEAD.",
 224         "As a result, you may see the changes you just pushed into it",
 225         "reverted when you run 'git diff' over there, and you may want",
 226         "to run 'git reset --hard' before starting to work to recover.",
 227         "",
 228         "You can set 'receive.denyCurrentBranch' configuration variable to",
 229         "'refuse' in the remote repository to forbid pushing into its",
 230         "current branch."
 231         "",
 232         "To allow pushing into the current branch, you can set it to 'ignore';",
 233         "but this is not recommended unless you arranged to update its work",
 234         "tree to match what you pushed in some other way.",
 235         "",
 236         "To squelch this message, you can set it to 'warn'.",
 237         "",
 238         "Note that the default will change in a future version of git",
 239         "to refuse updating the current branch unless you have the",
 240         "configuration variable set to either 'ignore' or 'warn'."
 241 };
 242
 243 static void warn_unconfigured_deny(void)
 244 {
 245         int i;
 246         for (i = 0; i < ARRAY_SIZE(warn_unconfigured_deny_msg); i++)
 247                 warning("%s", warn_unconfigured_deny_msg[i]);
 248 }
 249
 250 static char *warn_unconfigured_deny_delete_current_msg[] = {
 251         "Deleting the current branch can cause confusion by making the next",
 252         "'git clone' not check out any file.",
 253         "",
 254         "You can set 'receive.denyDeleteCurrent' configuration variable to",
 255         "'refuse' in the remote repository to disallow deleting the current",
 256         "branch.",
 257         "",
 258         "You can set it to 'ignore' to allow such a delete without a warning.",
 259         "",
 260         "To make this warning message less loud, you can set it to 'warn'.",
 261         "",
 262         "Note that the default will change in a future version of git",
 263         "to refuse deleting the current branch unless you have the",
 264         "configuration variable set to either 'ignore' or 'warn'."
 265 };
 266
 267 static void warn_unconfigured_deny_delete_current(void)
 268 {
 269         int i;
 270         for (i = 0;
 271              i < ARRAY_SIZE(warn_unconfigured_deny_delete_current_msg);
 272              i++)
 273                 warning("%s", warn_unconfigured_deny_delete_current_msg[i]);
 274 }
 275
 276 static const char *update(struct command *cmd)
 277 {
 278         const char *name = cmd->ref_name;
 279         unsigned char *old_sha1 = cmd->old_sha1;
 280         unsigned char *new_sha1 = cmd->new_sha1;
 281         struct ref_lock *lock;
 282
 283         /* only refs/... are allowed */
 284         if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) {
 285                 error("refusing to create funny ref '%s' remotely", name);
 286                 return "funny refname";
 287         }
 288
 289         if (is_ref_checked_out(name)) {
 290                 switch (deny_current_branch) {
 291                 case DENY_IGNORE:
 292                         break;
 293                 case DENY_UNCONFIGURED:
 294                 case DENY_WARN:
 295                         warning("updating the current branch");
 296                         if (deny_current_branch == DENY_UNCONFIGURED)
 297                                 warn_unconfigured_deny();
 298                         break;
 299                 case DENY_REFUSE:
 300                         error("refusing to update checked out branch: %s", name);
 301                         return "branch is currently checked out";
 302                 }
 303         }
 304
 305         if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
 306                 error("unpack should have generated %s, "
 307                       "but I can't find it!", sha1_to_hex(new_sha1));
 308                 return "bad pack";
 309         }
 310
 311         if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) {
 312                 if (deny_deletes && !prefixcmp(name, "refs/heads/")) {
 313                         error("denying ref deletion for %s", name);
 314                         return "deletion prohibited";
 315                 }
 316
 317                 if (!strcmp(name, head_name)) {
 318                         switch (deny_delete_current) {
 319                         case DENY_IGNORE:
 320                                 break;
 321                         case DENY_WARN:
 322                         case DENY_UNCONFIGURED:
 323                                 if (deny_delete_current == DENY_UNCONFIGURED)
 324                                         warn_unconfigured_deny_delete_current();
 325                                 warning("deleting the current branch");
 326                                 break;
 327                         case DENY_REFUSE:
 328                                 error("refusing to delete the current branch: %s", name);
 329                                 return "deletion of the current branch prohibited";
 330                         }
 331                 }
 332         }
 333
 334         if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
 335             !is_null_sha1(old_sha1) &&
 336             !prefixcmp(name, "refs/heads/")) {
 337                 struct object *old_object, *new_object;
 338                 struct commit *old_commit, *new_commit;
 339                 struct commit_list *bases, *ent;
 340
 341                 old_object = parse_object(old_sha1);
 342                 new_object = parse_object(new_sha1);
 343
 344                 if (!old_object || !new_object ||
 345                     old_object->type != OBJ_COMMIT ||
 346                     new_object->type != OBJ_COMMIT) {
 347                         error("bad sha1 objects for %s", name);
 348                         return "bad ref";
 349                 }
 350                 old_commit = (struct commit *)old_object;
 351                 new_commit = (struct commit *)new_object;
 352                 bases = get_merge_bases(old_commit, new_commit, 1);
 353                 for (ent = bases; ent; ent = ent->next)
 354                         if (!hashcmp(old_sha1, ent->item->object.sha1))
 355                                 break;
 356                 free_commit_list(bases);
 357                 if (!ent) {
 358                         error("denying non-fast forward %s"
 359                               " (you should pull first)", name);
 360                         return "non-fast forward";
 361                 }
 362         }
 363         if (run_update_hook(cmd)) {
 364                 error("hook declined to update %s", name);
 365                 return "hook declined";
 366         }
 367
 368         if (is_null_sha1(new_sha1)) {
 369                 if (!parse_object(old_sha1)) {
 370                         warning ("Allowing deletion of corrupt ref.");
 371                         old_sha1 = NULL;
 372                 }
 373                 if (delete_ref(name, old_sha1, 0)) {
 374                         error("failed to delete %s", name);
 375                         return "failed to delete";
 376                 }
 377                 return NULL; /* good */
 378         }
 379         else {
 380                 lock = lock_any_ref_for_update(name, old_sha1, 0);
 381                 if (!lock) {
 382                         error("failed to lock %s", name);
 383                         return "failed to lock";
 384                 }
 385                 if (write_ref_sha1(lock, new_sha1, "push")) {
 386                         return "failed to write"; /* error() already called */
 387                 }
 388                 return NULL; /* good */
 389         }
 390 }
 391
 392 static char update_post_hook[] = "hooks/post-update";
 393
 394 static void run_update_post_hook(struct command *cmd)
 395 {
 396         struct command *cmd_p;
 397         int argc, status;
 398         const char **argv;
 399
 400         for (argc = 0, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
 401                 if (cmd_p->error_string)
 402                         continue;
 403                 argc++;
 404         }
 405         if (!argc || access(update_post_hook, X_OK) < 0)
 406                 return;
 407         argv = xmalloc(sizeof(*argv) * (2 + argc));
 408         argv[0] = update_post_hook;
 409
 410         for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
 411                 char *p;
 412                 if (cmd_p->error_string)
 413                         continue;
 414                 p = xmalloc(strlen(cmd_p->ref_name) + 1);
 415                 strcpy(p, cmd_p->ref_name);
 416                 argv[argc] = p;
 417                 argc++;
 418         }
 419         argv[argc] = NULL;
 420         status = run_command_v_opt(argv, RUN_COMMAND_NO_STDIN
 421                         | RUN_COMMAND_STDOUT_TO_STDERR);
 422         run_status(status, update_post_hook);
 423 }
 424
 425 static void execute_commands(const char *unpacker_error)
 426 {
 427         struct command *cmd = commands;
 428         unsigned char sha1[20];
 429
 430         if (unpacker_error) {
 431                 while (cmd) {
 432                         cmd->error_string = "n/a (unpacker error)";
 433                         cmd = cmd->next;
 434                 }
 435                 return;
 436         }
 437
 438         if (run_receive_hook(pre_receive_hook)) {
 439                 while (cmd) {
 440                         cmd->error_string = "pre-receive hook declined";
 441                         cmd = cmd->next;
 442                 }
 443                 return;
 444         }
 445
 446         head_name = resolve_ref("HEAD", sha1, 0, NULL);
 447
 448         while (cmd) {
 449                 cmd->error_string = update(cmd);
 450                 cmd = cmd->next;
 451         }
 452 }
 453
 454 static void read_head_info(void)
 455 {
 456         struct command **p = &commands;
 457         for (;;) {
 458                 static char line[1000];
 459                 unsigned char old_sha1[20], new_sha1[20];
 460                 struct command *cmd;
 461                 char *refname;
 462                 int len, reflen;
 463
 464                 len = packet_read_line(0, line, sizeof(line));
 465                 if (!len)
 466                         break;
 467                 if (line[len-1] == '\n')
 468                         line[--len] = 0;
 469                 if (len < 83 ||
 470                     line[40] != ' ' ||
 471                     line[81] != ' ' ||
 472                     get_sha1_hex(line, old_sha1) ||
 473                     get_sha1_hex(line + 41, new_sha1))
 474                         die("protocol error: expected old/new/ref, got '%s'",
 475                             line);
 476
 477                 refname = line + 82;
 478                 reflen = strlen(refname);
 479                 if (reflen + 82 < len) {
 480                         if (strstr(refname + reflen + 1, "report-status"))
 481                                 report_status = 1;
 482                 }
 483                 cmd = xmalloc(sizeof(struct command) + len - 80);
 484                 hashcpy(cmd->old_sha1, old_sha1);
 485                 hashcpy(cmd->new_sha1, new_sha1);
 486                 memcpy(cmd->ref_name, line + 82, len - 81);
 487                 cmd->error_string = NULL;
 488                 cmd->next = NULL;
 489                 *p = cmd;
 490                 p = &cmd->next;
 491         }
 492 }
 493
 494 static const char *parse_pack_header(struct pack_header *hdr)
 495 {
 496         switch (read_pack_header(0, hdr)) {
 497         case PH_ERROR_EOF:
 498                 return "eof before pack header was fully read";
 499
 500         case PH_ERROR_PACK_SIGNATURE:
 501                 return "protocol error (pack signature mismatch detected)";
 502
 503         case PH_ERROR_PROTOCOL:
 504                 return "protocol error (pack version unsupported)";
 505
 506         default:
 507                 return "unknown error in parse_pack_header";
 508
 509         case 0:
 510                 return NULL;
 511         }
 512 }
 513
 514 static const char *pack_lockfile;
 515
 516 static const char *unpack(void)
 517 {
 518         struct pack_header hdr;
 519         const char *hdr_err;
 520         char hdr_arg[38];
 521
 522         hdr_err = parse_pack_header(&hdr);
 523         if (hdr_err)
 524                 return hdr_err;
 525         snprintf(hdr_arg, sizeof(hdr_arg),
 526                         "--pack_header=%"PRIu32",%"PRIu32,
 527                         ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
 528
 529         if (ntohl(hdr.hdr_entries) < unpack_limit) {
 530                 int code, i = 0;
 531                 const char *unpacker[4];
 532                 unpacker[i++] = "unpack-objects";
 533                 if (receive_fsck_objects)
 534                         unpacker[i++] = "--strict";
 535                 unpacker[i++] = hdr_arg;
 536                 unpacker[i++] = NULL;
 537                 code = run_command_v_opt(unpacker, RUN_GIT_CMD);
 538                 if (!code)
 539                         return NULL;
 540                 run_status(code, unpacker[0]);
 541                 return "unpack-objects abnormal exit";
 542         } else {
 543                 const char *keeper[7];
 544                 int s, status, i = 0;
 545                 char keep_arg[256];
 546                 struct child_process ip;
 547
 548                 s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid());
 549                 if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
 550                         strcpy(keep_arg + s, "localhost");
 551
 552                 keeper[i++] = "index-pack";
 553                 keeper[i++] = "--stdin";
 554                 if (receive_fsck_objects)
 555                         keeper[i++] = "--strict";
 556                 keeper[i++] = "--fix-thin";
 557                 keeper[i++] = hdr_arg;
 558                 keeper[i++] = keep_arg;
 559                 keeper[i++] = NULL;
 560                 memset(&ip, 0, sizeof(ip));
 561                 ip.argv = keeper;
 562                 ip.out = -1;
 563                 ip.git_cmd = 1;
 564                 status = start_command(&ip);
 565                 if (status) {
 566                         run_status(status, keeper[0]);
 567                         return "index-pack fork failed";
 568                 }
 569                 pack_lockfile = index_pack_lockfile(ip.out);
 570                 close(ip.out);
 571                 status = finish_command(&ip);
 572                 if (!status) {
 573                         reprepare_packed_git();
 574                         return NULL;
 575                 }
 576                 run_status(status, keeper[0]);
 577                 return "index-pack abnormal exit";
 578         }
 579 }
 580
 581 static void report(const char *unpack_status)
 582 {
 583         struct command *cmd;
 584         packet_write(1, "unpack %s\n",
 585                      unpack_status ? unpack_status : "ok");
 586         for (cmd = commands; cmd; cmd = cmd->next) {
 587                 if (!cmd->error_string)
 588                         packet_write(1, "ok %s\n",
 589                                      cmd->ref_name);
 590                 else
 591                         packet_write(1, "ng %s %s\n",
 592                                      cmd->ref_name, cmd->error_string);
 593         }
 594         packet_flush(1);
 595 }
 596
 597 static int delete_only(struct command *cmd)
 598 {
 599         while (cmd) {
 600                 if (!is_null_sha1(cmd->new_sha1))
 601                         return 0;
 602                 cmd = cmd->next;
 603         }
 604         return 1;
 605 }
 606
 607 static int add_refs_from_alternate(struct alternate_object_database *e, void *unused)
 608 {
 609         char *other;
 610         size_t len;
 611         struct remote *remote;
 612         struct transport *transport;
 613         const struct ref *extra;
 614
 615         e->name[-1] = '\0';
 616         other = xstrdup(make_absolute_path(e->base));
 617         e->name[-1] = '/';
 618         len = strlen(other);
 619
 620         while (other[len-1] == '/')
 621                 other[--len] = '\0';
 622         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
 623                 return 0;
 624         /* Is this a git repository with refs? */
 625         memcpy(other + len - 8, "/refs", 6);
 626         if (!is_directory(other))
 627                 return 0;
 628         other[len - 8] = '\0';
 629         remote = remote_get(other);
 630         transport = transport_get(remote, other);
 631         for (extra = transport_get_remote_refs(transport);
 632              extra;
 633              extra = extra->next) {
 634                 add_extra_ref(".have", extra->old_sha1, 0);
 635         }
 636         transport_disconnect(transport);
 637         free(other);
 638         return 0;
 639 }
 640
 641 static void add_alternate_refs(void)
 642 {
 643         foreach_alt_odb(add_refs_from_alternate, NULL);
 644 }
 645
 646 int cmd_receive_pack(int argc, const char **argv, const char *prefix)
 647 {
 648         int i;
 649         char *dir = NULL;
 650
 651         argv++;
 652         for (i = 1; i < argc; i++) {
 653                 const char *arg = *argv++;
 654
 655                 if (*arg == '-') {
 656                         /* Do flag handling here */
 657                         usage(receive_pack_usage);
 658                 }
 659                 if (dir)
 660                         usage(receive_pack_usage);
 661                 dir = xstrdup(arg);
 662         }
 663         if (!dir)
 664                 usage(receive_pack_usage);
 665
 666         setup_path();
 667
 668         if (!enter_repo(dir, 0))
 669                 die("'%s' does not appear to be a git repository", dir);
 670
 671         if (is_repository_shallow())
 672                 die("attempt to push into a shallow repository");
 673
 674         git_config(receive_pack_config, NULL);
 675
 676         if (0 <= transfer_unpack_limit)
 677                 unpack_limit = transfer_unpack_limit;
 678         else if (0 <= receive_unpack_limit)
 679                 unpack_limit = receive_unpack_limit;
 680
 681         capabilities_to_send = (prefer_ofs_delta) ?
 682                 " report-status delete-refs ofs-delta " :
 683                 " report-status delete-refs ";
 684
 685         add_alternate_refs();
 686         write_head_info();
 687         clear_extra_refs();
 688
 689         /* EOF */
 690         packet_flush(1);
 691
 692         read_head_info();
 693         if (commands) {
 694                 const char *unpack_status = NULL;
 695
 696                 if (!delete_only(commands))
 697                         unpack_status = unpack();
 698                 execute_commands(unpack_status);
 699                 if (pack_lockfile)
 700                         unlink_or_warn(pack_lockfile);
 701                 if (report_status)
 702                         report(unpack_status);
 703                 run_receive_hook(post_receive_hook);
 704                 run_update_post_hook(commands);
 705         }
 706         return 0;
 707 }