git.oblomov.eu Git - git/blob - builtin-fetch.c

   1 /*
   2  * "git fetch"
   3  */
   4 #include "cache.h"
   5 #include "refs.h"
   6 #include "commit.h"
   7 #include "builtin.h"
   8 #include "path-list.h"
   9 #include "remote.h"
  10 #include "transport.h"
  11 #include "run-command.h"
  12
  13 static const char fetch_usage[] = "git-fetch [-a | --append] [--upload-pack <upload-pack>] [-f | --force] [--no-tags] [-t | --tags] [-k | --keep] [-u | --update-head-ok] [--depth <depth>] [-v | --verbose] [<repository> <refspec>...]";
  14
  15 static int append, force, tags, no_tags, update_head_ok, verbose, quiet;
  16 static const char *depth;
  17 static char *default_rla = NULL;
  18 static struct transport *transport;
  19
  20 static void unlock_pack(void)
  21 {
  22         if (transport)
  23                 transport_unlock_pack(transport);
  24 }
  25
  26 static void unlock_pack_on_signal(int signo)
  27 {
  28         unlock_pack();
  29         signal(SIGINT, SIG_DFL);
  30         raise(signo);
  31 }
  32
  33 static void add_merge_config(struct ref **head,
  34                            struct ref *remote_refs,
  35                            struct branch *branch,
  36                            struct ref ***tail)
  37 {
  38         int i;
  39
  40         for (i = 0; i < branch->merge_nr; i++) {
  41                 struct ref *rm, **old_tail = *tail;
  42                 struct refspec refspec;
  43
  44                 for (rm = *head; rm; rm = rm->next) {
  45                         if (branch_merge_matches(branch, i, rm->name)) {
  46                                 rm->merge = 1;
  47                                 break;
  48                         }
  49                 }
  50                 if (rm)
  51                         continue;
  52
  53                 /*
  54                  * Not fetched to a tracking branch?  We need to fetch
  55                  * it anyway to allow this branch's "branch.$name.merge"
  56                  * to be honored by git-pull, but we do not have to
  57                  * fail if branch.$name.merge is misconfigured to point
  58                  * at a nonexisting branch.  If we were indeed called by
  59                  * git-pull, it will notice the misconfiguration because
  60                  * there is no entry in the resulting FETCH_HEAD marked
  61                  * for merging.
  62                  */
  63                 refspec.src = branch->merge[i]->src;
  64                 refspec.dst = NULL;
  65                 refspec.pattern = 0;
  66                 refspec.force = 0;
  67                 get_fetch_map(remote_refs, &refspec, tail, 1);
  68                 for (rm = *old_tail; rm; rm = rm->next)
  69                         rm->merge = 1;
  70         }
  71 }
  72
  73 static struct ref *get_ref_map(struct transport *transport,
  74                                struct refspec *refs, int ref_count, int tags,
  75                                int *autotags)
  76 {
  77         int i;
  78         struct ref *rm;
  79         struct ref *ref_map = NULL;
  80         struct ref **tail = &ref_map;
  81
  82         struct ref *remote_refs = transport_get_remote_refs(transport);
  83
  84         if (ref_count || tags) {
  85                 for (i = 0; i < ref_count; i++) {
  86                         get_fetch_map(remote_refs, &refs[i], &tail, 0);
  87                         if (refs[i].dst && refs[i].dst[0])
  88                                 *autotags = 1;
  89                 }
  90                 /* Merge everything on the command line, but not --tags */
  91                 for (rm = ref_map; rm; rm = rm->next)
  92                         rm->merge = 1;
  93                 if (tags) {
  94                         struct refspec refspec;
  95                         refspec.src = "refs/tags/";
  96                         refspec.dst = "refs/tags/";
  97                         refspec.pattern = 1;
  98                         refspec.force = 0;
  99                         get_fetch_map(remote_refs, &refspec, &tail, 0);
 100                 }
 101         } else {
 102                 /* Use the defaults */
 103                 struct remote *remote = transport->remote;
 104                 struct branch *branch = branch_get(NULL);
 105                 int has_merge = branch_has_merge_config(branch);
 106                 if (remote && (remote->fetch_refspec_nr || has_merge)) {
 107                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 108                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 109                                 if (remote->fetch[i].dst &&
 110                                     remote->fetch[i].dst[0])
 111                                         *autotags = 1;
 112                                 if (!i && !has_merge && ref_map &&
 113                                     !remote->fetch[0].pattern)
 114                                         ref_map->merge = 1;
 115                         }
 116                         /*
 117                          * if the remote we're fetching from is the same
 118                          * as given in branch.<name>.remote, we add the
 119                          * ref given in branch.<name>.merge, too.
 120                          */
 121                         if (has_merge &&
 122                             !strcmp(branch->remote_name, remote->name))
 123                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 124                 } else {
 125                         ref_map = get_remote_ref(remote_refs, "HEAD");
 126                         if (!ref_map)
 127                                 die("Couldn't find remote ref HEAD");
 128                         ref_map->merge = 1;
 129                 }
 130         }
 131         ref_remove_duplicates(ref_map);
 132
 133         return ref_map;
 134 }
 135
 136 static int s_update_ref(const char *action,
 137                         struct ref *ref,
 138                         int check_old)
 139 {
 140         char msg[1024];
 141         char *rla = getenv("GIT_REFLOG_ACTION");
 142         static struct ref_lock *lock;
 143
 144         if (!rla)
 145                 rla = default_rla;
 146         snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 147         lock = lock_any_ref_for_update(ref->name,
 148                                        check_old ? ref->old_sha1 : NULL, 0);
 149         if (!lock)
 150                 return 1;
 151         if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
 152                 return 1;
 153         return 0;
 154 }
 155
 156 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 157 #define REFCOL_WIDTH  10
 158
 159 static int update_local_ref(struct ref *ref,
 160                             const char *remote,
 161                             int verbose,
 162                             char *display)
 163 {
 164         struct commit *current = NULL, *updated;
 165         enum object_type type;
 166         struct branch *current_branch = branch_get(NULL);
 167         const char *pretty_ref = ref->name + (
 168                 !prefixcmp(ref->name, "refs/heads/") ? 11 :
 169                 !prefixcmp(ref->name, "refs/tags/") ? 10 :
 170                 !prefixcmp(ref->name, "refs/remotes/") ? 13 :
 171                 0);
 172
 173         *display = 0;
 174         type = sha1_object_info(ref->new_sha1, NULL);
 175         if (type < 0)
 176                 die("object %s not found", sha1_to_hex(ref->new_sha1));
 177
 178         if (!*ref->name) {
 179                 /* Not storing */
 180                 if (verbose)
 181                         sprintf(display, "* branch %s -> FETCH_HEAD", remote);
 182                 return 0;
 183         }
 184
 185         if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
 186                 if (verbose)
 187                         sprintf(display, "= %-*s %-*s -> %s", SUMMARY_WIDTH,
 188                                 "[up to date]", REFCOL_WIDTH, remote,
 189                                 pretty_ref);
 190                 return 0;
 191         }
 192
 193         if (current_branch &&
 194             !strcmp(ref->name, current_branch->name) &&
 195             !(update_head_ok || is_bare_repository()) &&
 196             !is_null_sha1(ref->old_sha1)) {
 197                 /*
 198                  * If this is the head, and it's not okay to update
 199                  * the head, and the old value of the head isn't empty...
 200                  */
 201                 sprintf(display, "! %-*s %-*s -> %s  (can't fetch in current branch)",
 202                         SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 203                         pretty_ref);
 204                 return 1;
 205         }
 206
 207         if (!is_null_sha1(ref->old_sha1) &&
 208             !prefixcmp(ref->name, "refs/tags/")) {
 209                 sprintf(display, "- %-*s %-*s -> %s",
 210                         SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
 211                         pretty_ref);
 212                 return s_update_ref("updating tag", ref, 0);
 213         }
 214
 215         current = lookup_commit_reference_gently(ref->old_sha1, 1);
 216         updated = lookup_commit_reference_gently(ref->new_sha1, 1);
 217         if (!current || !updated) {
 218                 const char *msg;
 219                 const char *what;
 220                 if (!strncmp(ref->name, "refs/tags/", 10)) {
 221                         msg = "storing tag";
 222                         what = "[new tag]";
 223                 }
 224                 else {
 225                         msg = "storing head";
 226                         what = "[new branch]";
 227                 }
 228
 229                 sprintf(display, "* %-*s %-*s -> %s", SUMMARY_WIDTH, what,
 230                         REFCOL_WIDTH, remote, pretty_ref);
 231                 return s_update_ref(msg, ref, 0);
 232         }
 233
 234         if (in_merge_bases(current, &updated, 1)) {
 235                 char quickref[83];
 236                 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 237                 strcat(quickref, "..");
 238                 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 239                 sprintf(display, "  %-*s %-*s -> %s", SUMMARY_WIDTH, quickref,
 240                         REFCOL_WIDTH, remote, pretty_ref);
 241                 return s_update_ref("fast forward", ref, 1);
 242         } else if (force || ref->force) {
 243                 char quickref[84];
 244                 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 245                 strcat(quickref, "...");
 246                 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 247                 sprintf(display, "+ %-*s %-*s -> %s  (forced update)",
 248                         SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote, pretty_ref);
 249                 return s_update_ref("forced-update", ref, 1);
 250         } else {
 251                 sprintf(display, "! %-*s %-*s -> %s  (non fast forward)",
 252                         SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 253                         pretty_ref);
 254                 return 1;
 255         }
 256 }
 257
 258 static void store_updated_refs(const char *url, struct ref *ref_map)
 259 {
 260         FILE *fp;
 261         struct commit *commit;
 262         int url_len, i, note_len, shown_url = 0;
 263         char note[1024];
 264         const char *what, *kind;
 265         struct ref *rm;
 266
 267         fp = fopen(git_path("FETCH_HEAD"), "a");
 268         for (rm = ref_map; rm; rm = rm->next) {
 269                 struct ref *ref = NULL;
 270
 271                 if (rm->peer_ref) {
 272                         ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
 273                         strcpy(ref->name, rm->peer_ref->name);
 274                         hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
 275                         hashcpy(ref->new_sha1, rm->old_sha1);
 276                         ref->force = rm->peer_ref->force;
 277                 }
 278
 279                 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
 280                 if (!commit)
 281                         rm->merge = 0;
 282
 283                 if (!strcmp(rm->name, "HEAD")) {
 284                         kind = "";
 285                         what = "";
 286                 }
 287                 else if (!prefixcmp(rm->name, "refs/heads/")) {
 288                         kind = "branch";
 289                         what = rm->name + 11;
 290                 }
 291                 else if (!prefixcmp(rm->name, "refs/tags/")) {
 292                         kind = "tag";
 293                         what = rm->name + 10;
 294                 }
 295                 else if (!prefixcmp(rm->name, "refs/remotes/")) {
 296                         kind = "remote branch";
 297                         what = rm->name + 13;
 298                 }
 299                 else {
 300                         kind = "";
 301                         what = rm->name;
 302                 }
 303
 304                 url_len = strlen(url);
 305                 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 306                         ;
 307                 url_len = i + 1;
 308                 if (4 < i && !strncmp(".git", url + i - 3, 4))
 309                         url_len = i - 3;
 310
 311                 note_len = 0;
 312                 if (*what) {
 313                         if (*kind)
 314                                 note_len += sprintf(note + note_len, "%s ",
 315                                                     kind);
 316                         note_len += sprintf(note + note_len, "'%s' of ", what);
 317                 }
 318                 note_len += sprintf(note + note_len, "%.*s", url_len, url);
 319                 fprintf(fp, "%s\t%s\t%s\n",
 320                         sha1_to_hex(commit ? commit->object.sha1 :
 321                                     rm->old_sha1),
 322                         rm->merge ? "" : "not-for-merge",
 323                         note);
 324
 325                 if (ref) {
 326                         update_local_ref(ref, what, verbose, note);
 327                         if (*note) {
 328                                 if (!shown_url) {
 329                                         fprintf(stderr, "From %.*s\n",
 330                                                         url_len, url);
 331                                         shown_url = 1;
 332                                 }
 333                                 fprintf(stderr, " %s\n", note);
 334                         }
 335                 }
 336         }
 337         fclose(fp);
 338 }
 339
 340 /*
 341  * We would want to bypass the object transfer altogether if
 342  * everything we are going to fetch already exists and connected
 343  * locally.
 344  *
 345  * The refs we are going to fetch are in to_fetch (nr_heads in
 346  * total).  If running
 347  *
 348  *  $ git-rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
 349  *
 350  * does not error out, that means everything reachable from the
 351  * refs we are going to fetch exists and is connected to some of
 352  * our existing refs.
 353  */
 354 static int quickfetch(struct ref *ref_map)
 355 {
 356         struct child_process revlist;
 357         struct ref *ref;
 358         char **argv;
 359         int i, err;
 360
 361         /*
 362          * If we are deepening a shallow clone we already have these
 363          * objects reachable.  Running rev-list here will return with
 364          * a good (0) exit status and we'll bypass the fetch that we
 365          * really need to perform.  Claiming failure now will ensure
 366          * we perform the network exchange to deepen our history.
 367          */
 368         if (depth)
 369                 return -1;
 370
 371         for (i = 0, ref = ref_map; ref; ref = ref->next)
 372                 i++;
 373         if (!i)
 374                 return 0;
 375
 376         argv = xmalloc(sizeof(*argv) * (i + 6));
 377         i = 0;
 378         argv[i++] = xstrdup("rev-list");
 379         argv[i++] = xstrdup("--quiet");
 380         argv[i++] = xstrdup("--objects");
 381         for (ref = ref_map; ref; ref = ref->next)
 382                 argv[i++] = xstrdup(sha1_to_hex(ref->old_sha1));
 383         argv[i++] = xstrdup("--not");
 384         argv[i++] = xstrdup("--all");
 385         argv[i++] = NULL;
 386
 387         memset(&revlist, 0, sizeof(revlist));
 388         revlist.argv = (const char**)argv;
 389         revlist.git_cmd = 1;
 390         revlist.no_stdin = 1;
 391         revlist.no_stdout = 1;
 392         revlist.no_stderr = 1;
 393         err = run_command(&revlist);
 394
 395         for (i = 0; argv[i]; i++)
 396                 free(argv[i]);
 397         free(argv);
 398         return err;
 399 }
 400
 401 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 402 {
 403         int ret = quickfetch(ref_map);
 404         if (ret)
 405                 ret = transport_fetch_refs(transport, ref_map);
 406         if (!ret)
 407                 store_updated_refs(transport->url, ref_map);
 408         transport_unlock_pack(transport);
 409         return ret;
 410 }
 411
 412 static int add_existing(const char *refname, const unsigned char *sha1,
 413                         int flag, void *cbdata)
 414 {
 415         struct path_list *list = (struct path_list *)cbdata;
 416         path_list_insert(refname, list);
 417         return 0;
 418 }
 419
 420 static struct ref *find_non_local_tags(struct transport *transport,
 421                                        struct ref *fetch_map)
 422 {
 423         static struct path_list existing_refs = { NULL, 0, 0, 0 };
 424         struct path_list new_refs = { NULL, 0, 0, 1 };
 425         char *ref_name;
 426         int ref_name_len;
 427         unsigned char *ref_sha1;
 428         struct ref *tag_ref;
 429         struct ref *rm = NULL;
 430         struct ref *ref_map = NULL;
 431         struct ref **tail = &ref_map;
 432         struct ref *ref;
 433
 434         for_each_ref(add_existing, &existing_refs);
 435         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 436                 if (prefixcmp(ref->name, "refs/tags"))
 437                         continue;
 438
 439                 ref_name = xstrdup(ref->name);
 440                 ref_name_len = strlen(ref_name);
 441                 ref_sha1 = ref->old_sha1;
 442
 443                 if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
 444                         ref_name[ref_name_len - 3] = 0;
 445                         tag_ref = transport_get_remote_refs(transport);
 446                         while (tag_ref) {
 447                                 if (!strcmp(tag_ref->name, ref_name)) {
 448                                         ref_sha1 = tag_ref->old_sha1;
 449                                         break;
 450                                 }
 451                                 tag_ref = tag_ref->next;
 452                         }
 453                 }
 454
 455                 if (!path_list_has_path(&existing_refs, ref_name) &&
 456                     !path_list_has_path(&new_refs, ref_name) &&
 457                     has_sha1_file(ref->old_sha1)) {
 458                         path_list_insert(ref_name, &new_refs);
 459
 460                         rm = alloc_ref(strlen(ref_name) + 1);
 461                         strcpy(rm->name, ref_name);
 462                         rm->peer_ref = alloc_ref(strlen(ref_name) + 1);
 463                         strcpy(rm->peer_ref->name, ref_name);
 464                         hashcpy(rm->old_sha1, ref_sha1);
 465
 466                         *tail = rm;
 467                         tail = &rm->next;
 468                 }
 469                 free(ref_name);
 470         }
 471
 472         return ref_map;
 473 }
 474
 475 static int do_fetch(struct transport *transport,
 476                     struct refspec *refs, int ref_count)
 477 {
 478         struct ref *ref_map, *fetch_map;
 479         struct ref *rm;
 480         int autotags = (transport->remote->fetch_tags == 1);
 481         if (transport->remote->fetch_tags == 2 && !no_tags)
 482                 tags = 1;
 483         if (transport->remote->fetch_tags == -1)
 484                 no_tags = 1;
 485
 486         if (!transport->get_refs_list || !transport->fetch)
 487                 die("Don't know how to fetch from %s", transport->url);
 488
 489         /* if not appending, truncate FETCH_HEAD */
 490         if (!append)
 491                 fclose(fopen(git_path("FETCH_HEAD"), "w"));
 492
 493         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
 494
 495         for (rm = ref_map; rm; rm = rm->next) {
 496                 if (rm->peer_ref)
 497                         read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
 498         }
 499
 500         if (fetch_refs(transport, ref_map)) {
 501                 free_refs(ref_map);
 502                 return 1;
 503         }
 504
 505         fetch_map = ref_map;
 506
 507         /* if neither --no-tags nor --tags was specified, do automated tag
 508          * following ... */
 509         if (!(tags || no_tags) && autotags) {
 510                 ref_map = find_non_local_tags(transport, fetch_map);
 511                 if (ref_map) {
 512                         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
 513                         fetch_refs(transport, ref_map);
 514                 }
 515                 free_refs(ref_map);
 516         }
 517
 518         free_refs(fetch_map);
 519
 520         return 0;
 521 }
 522
 523 static void set_option(const char *name, const char *value)
 524 {
 525         int r = transport_set_option(transport, name, value);
 526         if (r < 0)
 527                 die("Option \"%s\" value \"%s\" is not valid for %s\n",
 528                         name, value, transport->url);
 529         if (r > 0)
 530                 warning("Option \"%s\" is ignored for %s\n",
 531                         name, transport->url);
 532 }
 533
 534 int cmd_fetch(int argc, const char **argv, const char *prefix)
 535 {
 536         struct remote *remote;
 537         int i, j, rla_offset;
 538         static const char **refs = NULL;
 539         int ref_nr = 0;
 540         int cmd_len = 0;
 541         const char *upload_pack = NULL;
 542         int keep = 0;
 543
 544         for (i = 1; i < argc; i++) {
 545                 const char *arg = argv[i];
 546                 cmd_len += strlen(arg);
 547
 548                 if (arg[0] != '-')
 549                         break;
 550                 if (!strcmp(arg, "--append") || !strcmp(arg, "-a")) {
 551                         append = 1;
 552                         continue;
 553                 }
 554                 if (!prefixcmp(arg, "--upload-pack=")) {
 555                         upload_pack = arg + 14;
 556                         continue;
 557                 }
 558                 if (!strcmp(arg, "--upload-pack")) {
 559                         i++;
 560                         if (i == argc)
 561                                 usage(fetch_usage);
 562                         upload_pack = argv[i];
 563                         continue;
 564                 }
 565                 if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
 566                         force = 1;
 567                         continue;
 568                 }
 569                 if (!strcmp(arg, "--no-tags")) {
 570                         no_tags = 1;
 571                         continue;
 572                 }
 573                 if (!strcmp(arg, "--tags") || !strcmp(arg, "-t")) {
 574                         tags = 1;
 575                         continue;
 576                 }
 577                 if (!strcmp(arg, "--keep") || !strcmp(arg, "-k")) {
 578                         keep = 1;
 579                         continue;
 580                 }
 581                 if (!strcmp(arg, "--update-head-ok") || !strcmp(arg, "-u")) {
 582                         update_head_ok = 1;
 583                         continue;
 584                 }
 585                 if (!prefixcmp(arg, "--depth=")) {
 586                         depth = arg + 8;
 587                         continue;
 588                 }
 589                 if (!strcmp(arg, "--depth")) {
 590                         i++;
 591                         if (i == argc)
 592                                 usage(fetch_usage);
 593                         depth = argv[i];
 594                         continue;
 595                 }
 596                 if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
 597                         quiet = 1;
 598                         continue;
 599                 }
 600                 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
 601                         verbose++;
 602                         continue;
 603                 }
 604                 usage(fetch_usage);
 605         }
 606
 607         for (j = i; j < argc; j++)
 608                 cmd_len += strlen(argv[j]);
 609
 610         default_rla = xmalloc(cmd_len + 5 + argc + 1);
 611         sprintf(default_rla, "fetch");
 612         rla_offset = strlen(default_rla);
 613         for (j = 1; j < argc; j++) {
 614                 sprintf(default_rla + rla_offset, " %s", argv[j]);
 615                 rla_offset += strlen(argv[j]) + 1;
 616         }
 617
 618         if (i == argc)
 619                 remote = remote_get(NULL);
 620         else
 621                 remote = remote_get(argv[i++]);
 622
 623         transport = transport_get(remote, remote->url[0]);
 624         if (verbose >= 2)
 625                 transport->verbose = 1;
 626         if (quiet)
 627                 transport->verbose = -1;
 628         if (upload_pack)
 629                 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
 630         if (keep)
 631                 set_option(TRANS_OPT_KEEP, "yes");
 632         if (depth)
 633                 set_option(TRANS_OPT_DEPTH, depth);
 634
 635         if (!transport->url)
 636                 die("Where do you want to fetch from today?");
 637
 638         if (i < argc) {
 639                 int j = 0;
 640                 refs = xcalloc(argc - i + 1, sizeof(const char *));
 641                 while (i < argc) {
 642                         if (!strcmp(argv[i], "tag")) {
 643                                 char *ref;
 644                                 i++;
 645                                 ref = xmalloc(strlen(argv[i]) * 2 + 22);
 646                                 strcpy(ref, "refs/tags/");
 647                                 strcat(ref, argv[i]);
 648                                 strcat(ref, ":refs/tags/");
 649                                 strcat(ref, argv[i]);
 650                                 refs[j++] = ref;
 651                         } else
 652                                 refs[j++] = argv[i];
 653                         i++;
 654                 }
 655                 refs[j] = NULL;
 656                 ref_nr = j;
 657         }
 658
 659         signal(SIGINT, unlock_pack_on_signal);
 660         atexit(unlock_pack);
 661         return do_fetch(transport, parse_ref_spec(ref_nr, refs), ref_nr);
 662 }