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 "string-list.h"
   9 #include "remote.h"
  10 #include "transport.h"
  11 #include "run-command.h"
  12 #include "parse-options.h"
  13 #include "sigchain.h"
  14
  15 static const char * const builtin_fetch_usage[] = {
  16         "git fetch [options] [<repository> <refspec>...]",
  17         NULL
  18 };
  19
  20 enum {
  21         TAGS_UNSET = 0,
  22         TAGS_DEFAULT = 1,
  23         TAGS_SET = 2
  24 };
  25
  26 static int append, force, keep, update_head_ok, verbosity;
  27 static int tags = TAGS_DEFAULT;
  28 static const char *depth;
  29 static const char *upload_pack;
  30 static struct strbuf default_rla = STRBUF_INIT;
  31 static struct transport *transport;
  32
  33 static struct option builtin_fetch_options[] = {
  34         OPT__VERBOSITY(&verbosity),
  35         OPT_BOOLEAN('a', "append", &append,
  36                     "append to .git/FETCH_HEAD instead of overwriting"),
  37         OPT_STRING(0, "upload-pack", &upload_pack, "PATH",
  38                    "path to upload pack on remote end"),
  39         OPT_BOOLEAN('f', "force", &force,
  40                     "force overwrite of local branch"),
  41         OPT_SET_INT('t', "tags", &tags,
  42                     "fetch all tags and associated objects", TAGS_SET),
  43         OPT_SET_INT('n', NULL, &tags,
  44                     "do not fetch all tags (--no-tags)", TAGS_UNSET),
  45         OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
  46         OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
  47                     "allow updating of HEAD ref"),
  48         OPT_STRING(0, "depth", &depth, "DEPTH",
  49                    "deepen history of shallow clone"),
  50         OPT_END()
  51 };
  52
  53 static void unlock_pack(void)
  54 {
  55         if (transport)
  56                 transport_unlock_pack(transport);
  57 }
  58
  59 static void unlock_pack_on_signal(int signo)
  60 {
  61         unlock_pack();
  62         sigchain_pop(signo);
  63         raise(signo);
  64 }
  65
  66 static void add_merge_config(struct ref **head,
  67                            const struct ref *remote_refs,
  68                            struct branch *branch,
  69                            struct ref ***tail)
  70 {
  71         int i;
  72
  73         for (i = 0; i < branch->merge_nr; i++) {
  74                 struct ref *rm, **old_tail = *tail;
  75                 struct refspec refspec;
  76
  77                 for (rm = *head; rm; rm = rm->next) {
  78                         if (branch_merge_matches(branch, i, rm->name)) {
  79                                 rm->merge = 1;
  80                                 break;
  81                         }
  82                 }
  83                 if (rm)
  84                         continue;
  85
  86                 /*
  87                  * Not fetched to a tracking branch?  We need to fetch
  88                  * it anyway to allow this branch's "branch.$name.merge"
  89                  * to be honored by 'git pull', but we do not have to
  90                  * fail if branch.$name.merge is misconfigured to point
  91                  * at a nonexisting branch.  If we were indeed called by
  92                  * 'git pull', it will notice the misconfiguration because
  93                  * there is no entry in the resulting FETCH_HEAD marked
  94                  * for merging.
  95                  */
  96                 refspec.src = branch->merge[i]->src;
  97                 refspec.dst = NULL;
  98                 refspec.pattern = 0;
  99                 refspec.force = 0;
 100                 get_fetch_map(remote_refs, &refspec, tail, 1);
 101                 for (rm = *old_tail; rm; rm = rm->next)
 102                         rm->merge = 1;
 103         }
 104 }
 105
 106 static void find_non_local_tags(struct transport *transport,
 107                         struct ref **head,
 108                         struct ref ***tail);
 109
 110 static struct ref *get_ref_map(struct transport *transport,
 111                                struct refspec *refs, int ref_count, int tags,
 112                                int *autotags)
 113 {
 114         int i;
 115         struct ref *rm;
 116         struct ref *ref_map = NULL;
 117         struct ref **tail = &ref_map;
 118
 119         const struct ref *remote_refs = transport_get_remote_refs(transport);
 120
 121         if (ref_count || tags == TAGS_SET) {
 122                 for (i = 0; i < ref_count; i++) {
 123                         get_fetch_map(remote_refs, &refs[i], &tail, 0);
 124                         if (refs[i].dst && refs[i].dst[0])
 125                                 *autotags = 1;
 126                 }
 127                 /* Merge everything on the command line, but not --tags */
 128                 for (rm = ref_map; rm; rm = rm->next)
 129                         rm->merge = 1;
 130                 if (tags == TAGS_SET)
 131                         get_fetch_map(remote_refs, tag_refspec, &tail, 0);
 132         } else {
 133                 /* Use the defaults */
 134                 struct remote *remote = transport->remote;
 135                 struct branch *branch = branch_get(NULL);
 136                 int has_merge = branch_has_merge_config(branch);
 137                 if (remote && (remote->fetch_refspec_nr || has_merge)) {
 138                         for (i = 0; i < remote->fetch_refspec_nr; i++) {
 139                                 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 140                                 if (remote->fetch[i].dst &&
 141                                     remote->fetch[i].dst[0])
 142                                         *autotags = 1;
 143                                 if (!i && !has_merge && ref_map &&
 144                                     !remote->fetch[0].pattern)
 145                                         ref_map->merge = 1;
 146                         }
 147                         /*
 148                          * if the remote we're fetching from is the same
 149                          * as given in branch.<name>.remote, we add the
 150                          * ref given in branch.<name>.merge, too.
 151                          */
 152                         if (has_merge &&
 153                             !strcmp(branch->remote_name, remote->name))
 154                                 add_merge_config(&ref_map, remote_refs, branch, &tail);
 155                 } else {
 156                         ref_map = get_remote_ref(remote_refs, "HEAD");
 157                         if (!ref_map)
 158                                 die("Couldn't find remote ref HEAD");
 159                         ref_map->merge = 1;
 160                         tail = &ref_map->next;
 161                 }
 162         }
 163         if (tags == TAGS_DEFAULT && *autotags)
 164                 find_non_local_tags(transport, &ref_map, &tail);
 165         ref_remove_duplicates(ref_map);
 166
 167         return ref_map;
 168 }
 169
 170 static int s_update_ref(const char *action,
 171                         struct ref *ref,
 172                         int check_old)
 173 {
 174         char msg[1024];
 175         char *rla = getenv("GIT_REFLOG_ACTION");
 176         static struct ref_lock *lock;
 177
 178         if (!rla)
 179                 rla = default_rla.buf;
 180         snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 181         lock = lock_any_ref_for_update(ref->name,
 182                                        check_old ? ref->old_sha1 : NULL, 0);
 183         if (!lock)
 184                 return 2;
 185         if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
 186                 return 2;
 187         return 0;
 188 }
 189
 190 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 191 #define REFCOL_WIDTH  10
 192
 193 static int update_local_ref(struct ref *ref,
 194                             const char *remote,
 195                             char *display)
 196 {
 197         struct commit *current = NULL, *updated;
 198         enum object_type type;
 199         struct branch *current_branch = branch_get(NULL);
 200         const char *pretty_ref = prettify_ref(ref);
 201
 202         *display = 0;
 203         type = sha1_object_info(ref->new_sha1, NULL);
 204         if (type < 0)
 205                 die("object %s not found", sha1_to_hex(ref->new_sha1));
 206
 207         if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
 208                 if (verbosity > 0)
 209                         sprintf(display, "= %-*s %-*s -> %s", SUMMARY_WIDTH,
 210                                 "[up to date]", REFCOL_WIDTH, remote,
 211                                 pretty_ref);
 212                 return 0;
 213         }
 214
 215         if (current_branch &&
 216             !strcmp(ref->name, current_branch->name) &&
 217             !(update_head_ok || is_bare_repository()) &&
 218             !is_null_sha1(ref->old_sha1)) {
 219                 /*
 220                  * If this is the head, and it's not okay to update
 221                  * the head, and the old value of the head isn't empty...
 222                  */
 223                 sprintf(display, "! %-*s %-*s -> %s  (can't fetch in current branch)",
 224                         SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 225                         pretty_ref);
 226                 return 1;
 227         }
 228
 229         if (!is_null_sha1(ref->old_sha1) &&
 230             !prefixcmp(ref->name, "refs/tags/")) {
 231                 int r;
 232                 r = s_update_ref("updating tag", ref, 0);
 233                 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-',
 234                         SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
 235                         pretty_ref, r ? "  (unable to update local ref)" : "");
 236                 return r;
 237         }
 238
 239         current = lookup_commit_reference_gently(ref->old_sha1, 1);
 240         updated = lookup_commit_reference_gently(ref->new_sha1, 1);
 241         if (!current || !updated) {
 242                 const char *msg;
 243                 const char *what;
 244                 int r;
 245                 if (!strncmp(ref->name, "refs/tags/", 10)) {
 246                         msg = "storing tag";
 247                         what = "[new tag]";
 248                 }
 249                 else {
 250                         msg = "storing head";
 251                         what = "[new branch]";
 252                 }
 253
 254                 r = s_update_ref(msg, ref, 0);
 255                 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*',
 256                         SUMMARY_WIDTH, what, REFCOL_WIDTH, remote, pretty_ref,
 257                         r ? "  (unable to update local ref)" : "");
 258                 return r;
 259         }
 260
 261         if (in_merge_bases(current, &updated, 1)) {
 262                 char quickref[83];
 263                 int r;
 264                 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 265                 strcat(quickref, "..");
 266                 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 267                 r = s_update_ref("fast forward", ref, 1);
 268                 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ',
 269                         SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
 270                         pretty_ref, r ? "  (unable to update local ref)" : "");
 271                 return r;
 272         } else if (force || ref->force) {
 273                 char quickref[84];
 274                 int r;
 275                 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 276                 strcat(quickref, "...");
 277                 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 278                 r = s_update_ref("forced-update", ref, 1);
 279                 sprintf(display, "%c %-*s %-*s -> %s  (%s)", r ? '!' : '+',
 280                         SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
 281                         pretty_ref,
 282                         r ? "unable to update local ref" : "forced update");
 283                 return r;
 284         } else {
 285                 sprintf(display, "! %-*s %-*s -> %s  (non fast forward)",
 286                         SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 287                         pretty_ref);
 288                 return 1;
 289         }
 290 }
 291
 292 static int store_updated_refs(const char *raw_url, const char *remote_name,
 293                 struct ref *ref_map)
 294 {
 295         FILE *fp;
 296         struct commit *commit;
 297         int url_len, i, note_len, shown_url = 0, rc = 0;
 298         char note[1024];
 299         const char *what, *kind;
 300         struct ref *rm;
 301         char *url, *filename = git_path("FETCH_HEAD");
 302
 303         fp = fopen(filename, "a");
 304         if (!fp)
 305                 return error("cannot open %s: %s\n", filename, strerror(errno));
 306
 307         url = transport_anonymize_url(raw_url);
 308         for (rm = ref_map; rm; rm = rm->next) {
 309                 struct ref *ref = NULL;
 310
 311                 if (rm->peer_ref) {
 312                         ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
 313                         strcpy(ref->name, rm->peer_ref->name);
 314                         hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
 315                         hashcpy(ref->new_sha1, rm->old_sha1);
 316                         ref->force = rm->peer_ref->force;
 317                 }
 318
 319                 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
 320                 if (!commit)
 321                         rm->merge = 0;
 322
 323                 if (!strcmp(rm->name, "HEAD")) {
 324                         kind = "";
 325                         what = "";
 326                 }
 327                 else if (!prefixcmp(rm->name, "refs/heads/")) {
 328                         kind = "branch";
 329                         what = rm->name + 11;
 330                 }
 331                 else if (!prefixcmp(rm->name, "refs/tags/")) {
 332                         kind = "tag";
 333                         what = rm->name + 10;
 334                 }
 335                 else if (!prefixcmp(rm->name, "refs/remotes/")) {
 336                         kind = "remote branch";
 337                         what = rm->name + 13;
 338                 }
 339                 else {
 340                         kind = "";
 341                         what = rm->name;
 342                 }
 343
 344                 url_len = strlen(url);
 345                 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 346                         ;
 347                 url_len = i + 1;
 348                 if (4 < i && !strncmp(".git", url + i - 3, 4))
 349                         url_len = i - 3;
 350
 351                 note_len = 0;
 352                 if (*what) {
 353                         if (*kind)
 354                                 note_len += sprintf(note + note_len, "%s ",
 355                                                     kind);
 356                         note_len += sprintf(note + note_len, "'%s' of ", what);
 357                 }
 358                 note[note_len] = '\0';
 359                 fprintf(fp, "%s\t%s\t%s",
 360                         sha1_to_hex(commit ? commit->object.sha1 :
 361                                     rm->old_sha1),
 362                         rm->merge ? "" : "not-for-merge",
 363                         note);
 364                 for (i = 0; i < url_len; ++i)
 365                         if ('\n' == url[i])
 366                                 fputs("\\n", fp);
 367                         else
 368                                 fputc(url[i], fp);
 369                 fputc('\n', fp);
 370
 371                 if (ref)
 372                         rc |= update_local_ref(ref, what, note);
 373                 else
 374                         sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
 375                                 SUMMARY_WIDTH, *kind ? kind : "branch",
 376                                  REFCOL_WIDTH, *what ? what : "HEAD");
 377                 if (*note) {
 378                         if (verbosity >= 0 && !shown_url) {
 379                                 fprintf(stderr, "From %.*s\n",
 380                                                 url_len, url);
 381                                 shown_url = 1;
 382                         }
 383                         if (verbosity >= 0)
 384                                 fprintf(stderr, " %s\n", note);
 385                 }
 386         }
 387         free(url);
 388         fclose(fp);
 389         if (rc & 2)
 390                 error("some local refs could not be updated; try running\n"
 391                       " 'git remote prune %s' to remove any old, conflicting "
 392                       "branches", remote_name);
 393         return rc;
 394 }
 395
 396 /*
 397  * We would want to bypass the object transfer altogether if
 398  * everything we are going to fetch already exists and connected
 399  * locally.
 400  *
 401  * The refs we are going to fetch are in to_fetch (nr_heads in
 402  * total).  If running
 403  *
 404  *  $ git rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
 405  *
 406  * does not error out, that means everything reachable from the
 407  * refs we are going to fetch exists and is connected to some of
 408  * our existing refs.
 409  */
 410 static int quickfetch(struct ref *ref_map)
 411 {
 412         struct child_process revlist;
 413         struct ref *ref;
 414         char **argv;
 415         int i, err;
 416
 417         /*
 418          * If we are deepening a shallow clone we already have these
 419          * objects reachable.  Running rev-list here will return with
 420          * a good (0) exit status and we'll bypass the fetch that we
 421          * really need to perform.  Claiming failure now will ensure
 422          * we perform the network exchange to deepen our history.
 423          */
 424         if (depth)
 425                 return -1;
 426
 427         for (i = 0, ref = ref_map; ref; ref = ref->next)
 428                 i++;
 429         if (!i)
 430                 return 0;
 431
 432         argv = xmalloc(sizeof(*argv) * (i + 6));
 433         i = 0;
 434         argv[i++] = xstrdup("rev-list");
 435         argv[i++] = xstrdup("--quiet");
 436         argv[i++] = xstrdup("--objects");
 437         for (ref = ref_map; ref; ref = ref->next)
 438                 argv[i++] = xstrdup(sha1_to_hex(ref->old_sha1));
 439         argv[i++] = xstrdup("--not");
 440         argv[i++] = xstrdup("--all");
 441         argv[i++] = NULL;
 442
 443         memset(&revlist, 0, sizeof(revlist));
 444         revlist.argv = (const char**)argv;
 445         revlist.git_cmd = 1;
 446         revlist.no_stdin = 1;
 447         revlist.no_stdout = 1;
 448         revlist.no_stderr = 1;
 449         err = run_command(&revlist);
 450
 451         for (i = 0; argv[i]; i++)
 452                 free(argv[i]);
 453         free(argv);
 454         return err;
 455 }
 456
 457 static int fetch_refs(struct transport *transport, struct ref *ref_map)
 458 {
 459         int ret = quickfetch(ref_map);
 460         if (ret)
 461                 ret = transport_fetch_refs(transport, ref_map);
 462         if (!ret)
 463                 ret |= store_updated_refs(transport->url,
 464                                 transport->remote->name,
 465                                 ref_map);
 466         transport_unlock_pack(transport);
 467         return ret;
 468 }
 469
 470 static int add_existing(const char *refname, const unsigned char *sha1,
 471                         int flag, void *cbdata)
 472 {
 473         struct string_list *list = (struct string_list *)cbdata;
 474         string_list_insert(refname, list);
 475         return 0;
 476 }
 477
 478 static int will_fetch(struct ref **head, const unsigned char *sha1)
 479 {
 480         struct ref *rm = *head;
 481         while (rm) {
 482                 if (!hashcmp(rm->old_sha1, sha1))
 483                         return 1;
 484                 rm = rm->next;
 485         }
 486         return 0;
 487 }
 488
 489 static void find_non_local_tags(struct transport *transport,
 490                         struct ref **head,
 491                         struct ref ***tail)
 492 {
 493         struct string_list existing_refs = { NULL, 0, 0, 0 };
 494         struct string_list new_refs = { NULL, 0, 0, 1 };
 495         char *ref_name;
 496         int ref_name_len;
 497         const unsigned char *ref_sha1;
 498         const struct ref *tag_ref;
 499         struct ref *rm = NULL;
 500         const struct ref *ref;
 501
 502         for_each_ref(add_existing, &existing_refs);
 503         for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 504                 if (prefixcmp(ref->name, "refs/tags"))
 505                         continue;
 506
 507                 ref_name = xstrdup(ref->name);
 508                 ref_name_len = strlen(ref_name);
 509                 ref_sha1 = ref->old_sha1;
 510
 511                 if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
 512                         ref_name[ref_name_len - 3] = 0;
 513                         tag_ref = transport_get_remote_refs(transport);
 514                         while (tag_ref) {
 515                                 if (!strcmp(tag_ref->name, ref_name)) {
 516                                         ref_sha1 = tag_ref->old_sha1;
 517                                         break;
 518                                 }
 519                                 tag_ref = tag_ref->next;
 520                         }
 521                 }
 522
 523                 if (!string_list_has_string(&existing_refs, ref_name) &&
 524                     !string_list_has_string(&new_refs, ref_name) &&
 525                     (has_sha1_file(ref->old_sha1) ||
 526                      will_fetch(head, ref->old_sha1))) {
 527                         string_list_insert(ref_name, &new_refs);
 528
 529                         rm = alloc_ref(ref_name);
 530                         rm->peer_ref = alloc_ref(ref_name);
 531                         hashcpy(rm->old_sha1, ref_sha1);
 532
 533                         **tail = rm;
 534                         *tail = &rm->next;
 535                 }
 536                 free(ref_name);
 537         }
 538         string_list_clear(&existing_refs, 0);
 539         string_list_clear(&new_refs, 0);
 540 }
 541
 542 static void check_not_current_branch(struct ref *ref_map)
 543 {
 544         struct branch *current_branch = branch_get(NULL);
 545
 546         if (is_bare_repository() || !current_branch)
 547                 return;
 548
 549         for (; ref_map; ref_map = ref_map->next)
 550                 if (ref_map->peer_ref && !strcmp(current_branch->refname,
 551                                         ref_map->peer_ref->name))
 552                         die("Refusing to fetch into current branch %s "
 553                             "of non-bare repository", current_branch->refname);
 554 }
 555
 556 static int do_fetch(struct transport *transport,
 557                     struct refspec *refs, int ref_count)
 558 {
 559         struct ref *ref_map;
 560         struct ref *rm;
 561         int autotags = (transport->remote->fetch_tags == 1);
 562         if (transport->remote->fetch_tags == 2 && tags != TAGS_UNSET)
 563                 tags = TAGS_SET;
 564         if (transport->remote->fetch_tags == -1)
 565                 tags = TAGS_UNSET;
 566
 567         if (!transport->get_refs_list || !transport->fetch)
 568                 die("Don't know how to fetch from %s", transport->url);
 569
 570         /* if not appending, truncate FETCH_HEAD */
 571         if (!append) {
 572                 char *filename = git_path("FETCH_HEAD");
 573                 FILE *fp = fopen(filename, "w");
 574                 if (!fp)
 575                         return error("cannot open %s: %s\n", filename, strerror(errno));
 576                 fclose(fp);
 577         }
 578
 579         ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
 580         if (!update_head_ok)
 581                 check_not_current_branch(ref_map);
 582
 583         for (rm = ref_map; rm; rm = rm->next) {
 584                 if (rm->peer_ref)
 585                         read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
 586         }
 587
 588         if (tags == TAGS_DEFAULT && autotags)
 589                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
 590         if (fetch_refs(transport, ref_map)) {
 591                 free_refs(ref_map);
 592                 return 1;
 593         }
 594         free_refs(ref_map);
 595
 596         /* if neither --no-tags nor --tags was specified, do automated tag
 597          * following ... */
 598         if (tags == TAGS_DEFAULT && autotags) {
 599                 struct ref **tail = &ref_map;
 600                 ref_map = NULL;
 601                 find_non_local_tags(transport, &ref_map, &tail);
 602                 if (ref_map) {
 603                         transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
 604                         transport_set_option(transport, TRANS_OPT_DEPTH, "0");
 605                         fetch_refs(transport, ref_map);
 606                 }
 607                 free_refs(ref_map);
 608         }
 609
 610         return 0;
 611 }
 612
 613 static void set_option(const char *name, const char *value)
 614 {
 615         int r = transport_set_option(transport, name, value);
 616         if (r < 0)
 617                 die("Option \"%s\" value \"%s\" is not valid for %s",
 618                         name, value, transport->url);
 619         if (r > 0)
 620                 warning("Option \"%s\" is ignored for %s\n",
 621                         name, transport->url);
 622 }
 623
 624 int cmd_fetch(int argc, const char **argv, const char *prefix)
 625 {
 626         struct remote *remote;
 627         int i;
 628         static const char **refs = NULL;
 629         int ref_nr = 0;
 630         int exit_code;
 631
 632         /* Record the command line for the reflog */
 633         strbuf_addstr(&default_rla, "fetch");
 634         for (i = 1; i < argc; i++)
 635                 strbuf_addf(&default_rla, " %s", argv[i]);
 636
 637         argc = parse_options(argc, argv,
 638                              builtin_fetch_options, builtin_fetch_usage, 0);
 639
 640         if (argc == 0)
 641                 remote = remote_get(NULL);
 642         else
 643                 remote = remote_get(argv[0]);
 644
 645         if (!remote)
 646                 die("Where do you want to fetch from today?");
 647
 648         transport = transport_get(remote, remote->url[0]);
 649         if (verbosity >= 2)
 650                 transport->verbose = 1;
 651         if (verbosity < 0)
 652                 transport->verbose = -1;
 653         if (upload_pack)
 654                 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
 655         if (keep)
 656                 set_option(TRANS_OPT_KEEP, "yes");
 657         if (depth)
 658                 set_option(TRANS_OPT_DEPTH, depth);
 659
 660         if (argc > 1) {
 661                 int j = 0;
 662                 refs = xcalloc(argc + 1, sizeof(const char *));
 663                 for (i = 1; i < argc; i++) {
 664                         if (!strcmp(argv[i], "tag")) {
 665                                 char *ref;
 666                                 i++;
 667                                 if (i >= argc)
 668                                         die("You need to specify a tag name.");
 669                                 ref = xmalloc(strlen(argv[i]) * 2 + 22);
 670                                 strcpy(ref, "refs/tags/");
 671                                 strcat(ref, argv[i]);
 672                                 strcat(ref, ":refs/tags/");
 673                                 strcat(ref, argv[i]);
 674                                 refs[j++] = ref;
 675                         } else
 676                                 refs[j++] = argv[i];
 677                 }
 678                 refs[j] = NULL;
 679                 ref_nr = j;
 680         }
 681
 682         sigchain_push_common(unlock_pack_on_signal);
 683         atexit(unlock_pack);
 684         exit_code = do_fetch(transport,
 685                         parse_fetch_refspec(ref_nr, refs), ref_nr);
 686         transport_disconnect(transport);
 687         transport = NULL;
 688         return exit_code;
 689 }