builtin-fetch.con commit Merge branch 'maint' (304d058)
   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
  14static const char * const builtin_fetch_usage[] = {
  15        "git fetch [options] [<repository> <refspec>...]",
  16        NULL
  17};
  18
  19enum {
  20        TAGS_UNSET = 0,
  21        TAGS_DEFAULT = 1,
  22        TAGS_SET = 2
  23};
  24
  25static int append, force, keep, update_head_ok, verbose, quiet;
  26static int tags = TAGS_DEFAULT;
  27static const char *depth;
  28static const char *upload_pack;
  29static struct strbuf default_rla = STRBUF_INIT;
  30static struct transport *transport;
  31
  32static struct option builtin_fetch_options[] = {
  33        OPT__QUIET(&quiet),
  34        OPT__VERBOSE(&verbose),
  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
  53static void unlock_pack(void)
  54{
  55        if (transport)
  56                transport_unlock_pack(transport);
  57}
  58
  59static void unlock_pack_on_signal(int signo)
  60{
  61        unlock_pack();
  62        signal(SIGINT, SIG_DFL);
  63        raise(signo);
  64}
  65
  66static 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
 106static void find_non_local_tags(struct transport *transport,
 107                        struct ref **head,
 108                        struct ref ***tail);
 109
 110static 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
 170static 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
 193static int update_local_ref(struct ref *ref,
 194                            const char *remote,
 195                            int verbose,
 196                            char *display)
 197{
 198        struct commit *current = NULL, *updated;
 199        enum object_type type;
 200        struct branch *current_branch = branch_get(NULL);
 201        const char *pretty_ref = ref->name + (
 202                !prefixcmp(ref->name, "refs/heads/") ? 11 :
 203                !prefixcmp(ref->name, "refs/tags/") ? 10 :
 204                !prefixcmp(ref->name, "refs/remotes/") ? 13 :
 205                0);
 206
 207        *display = 0;
 208        type = sha1_object_info(ref->new_sha1, NULL);
 209        if (type < 0)
 210                die("object %s not found", sha1_to_hex(ref->new_sha1));
 211
 212        if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
 213                if (verbose)
 214                        sprintf(display, "= %-*s %-*s -> %s", SUMMARY_WIDTH,
 215                                "[up to date]", REFCOL_WIDTH, remote,
 216                                pretty_ref);
 217                return 0;
 218        }
 219
 220        if (current_branch &&
 221            !strcmp(ref->name, current_branch->name) &&
 222            !(update_head_ok || is_bare_repository()) &&
 223            !is_null_sha1(ref->old_sha1)) {
 224                /*
 225                 * If this is the head, and it's not okay to update
 226                 * the head, and the old value of the head isn't empty...
 227                 */
 228                sprintf(display, "! %-*s %-*s -> %s  (can't fetch in current branch)",
 229                        SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 230                        pretty_ref);
 231                return 1;
 232        }
 233
 234        if (!is_null_sha1(ref->old_sha1) &&
 235            !prefixcmp(ref->name, "refs/tags/")) {
 236                int r;
 237                r = s_update_ref("updating tag", ref, 0);
 238                sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-',
 239                        SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
 240                        pretty_ref, r ? "  (unable to update local ref)" : "");
 241                return r;
 242        }
 243
 244        current = lookup_commit_reference_gently(ref->old_sha1, 1);
 245        updated = lookup_commit_reference_gently(ref->new_sha1, 1);
 246        if (!current || !updated) {
 247                const char *msg;
 248                const char *what;
 249                int r;
 250                if (!strncmp(ref->name, "refs/tags/", 10)) {
 251                        msg = "storing tag";
 252                        what = "[new tag]";
 253                }
 254                else {
 255                        msg = "storing head";
 256                        what = "[new branch]";
 257                }
 258
 259                r = s_update_ref(msg, ref, 0);
 260                sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*',
 261                        SUMMARY_WIDTH, what, REFCOL_WIDTH, remote, pretty_ref,
 262                        r ? "  (unable to update local ref)" : "");
 263                return r;
 264        }
 265
 266        if (in_merge_bases(current, &updated, 1)) {
 267                char quickref[83];
 268                int r;
 269                strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 270                strcat(quickref, "..");
 271                strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 272                r = s_update_ref("fast forward", ref, 1);
 273                sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ',
 274                        SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
 275                        pretty_ref, r ? "  (unable to update local ref)" : "");
 276                return r;
 277        } else if (force || ref->force) {
 278                char quickref[84];
 279                int r;
 280                strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 281                strcat(quickref, "...");
 282                strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 283                r = s_update_ref("forced-update", ref, 1);
 284                sprintf(display, "%c %-*s %-*s -> %s  (%s)", r ? '!' : '+',
 285                        SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
 286                        pretty_ref,
 287                        r ? "unable to update local ref" : "forced update");
 288                return r;
 289        } else {
 290                sprintf(display, "! %-*s %-*s -> %s  (non fast forward)",
 291                        SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 292                        pretty_ref);
 293                return 1;
 294        }
 295}
 296
 297static int store_updated_refs(const char *url, const char *remote_name,
 298                struct ref *ref_map)
 299{
 300        FILE *fp;
 301        struct commit *commit;
 302        int url_len, i, note_len, shown_url = 0, rc = 0;
 303        char note[1024];
 304        const char *what, *kind;
 305        struct ref *rm;
 306        char *filename = git_path("FETCH_HEAD");
 307
 308        fp = fopen(filename, "a");
 309        if (!fp)
 310                return error("cannot open %s: %s\n", filename, strerror(errno));
 311        for (rm = ref_map; rm; rm = rm->next) {
 312                struct ref *ref = NULL;
 313
 314                if (rm->peer_ref) {
 315                        ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
 316                        strcpy(ref->name, rm->peer_ref->name);
 317                        hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
 318                        hashcpy(ref->new_sha1, rm->old_sha1);
 319                        ref->force = rm->peer_ref->force;
 320                }
 321
 322                commit = lookup_commit_reference_gently(rm->old_sha1, 1);
 323                if (!commit)
 324                        rm->merge = 0;
 325
 326                if (!strcmp(rm->name, "HEAD")) {
 327                        kind = "";
 328                        what = "";
 329                }
 330                else if (!prefixcmp(rm->name, "refs/heads/")) {
 331                        kind = "branch";
 332                        what = rm->name + 11;
 333                }
 334                else if (!prefixcmp(rm->name, "refs/tags/")) {
 335                        kind = "tag";
 336                        what = rm->name + 10;
 337                }
 338                else if (!prefixcmp(rm->name, "refs/remotes/")) {
 339                        kind = "remote branch";
 340                        what = rm->name + 13;
 341                }
 342                else {
 343                        kind = "";
 344                        what = rm->name;
 345                }
 346
 347                url_len = strlen(url);
 348                for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 349                        ;
 350                url_len = i + 1;
 351                if (4 < i && !strncmp(".git", url + i - 3, 4))
 352                        url_len = i - 3;
 353
 354                note_len = 0;
 355                if (*what) {
 356                        if (*kind)
 357                                note_len += sprintf(note + note_len, "%s ",
 358                                                    kind);
 359                        note_len += sprintf(note + note_len, "'%s' of ", what);
 360                }
 361                note_len += sprintf(note + note_len, "%.*s", url_len, url);
 362                fprintf(fp, "%s\t%s\t%s\n",
 363                        sha1_to_hex(commit ? commit->object.sha1 :
 364                                    rm->old_sha1),
 365                        rm->merge ? "" : "not-for-merge",
 366                        note);
 367
 368                if (ref)
 369                        rc |= update_local_ref(ref, what, verbose, note);
 370                else
 371                        sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
 372                                SUMMARY_WIDTH, *kind ? kind : "branch",
 373                                 REFCOL_WIDTH, *what ? what : "HEAD");
 374                if (*note) {
 375                        if (!shown_url) {
 376                                fprintf(stderr, "From %.*s\n",
 377                                                url_len, url);
 378                                shown_url = 1;
 379                        }
 380                        fprintf(stderr, " %s\n", note);
 381                }
 382        }
 383        fclose(fp);
 384        if (rc & 2)
 385                error("some local refs could not be updated; try running\n"
 386                      " 'git remote prune %s' to remove any old, conflicting "
 387                      "branches", remote_name);
 388        return rc;
 389}
 390
 391/*
 392 * We would want to bypass the object transfer altogether if
 393 * everything we are going to fetch already exists and connected
 394 * locally.
 395 *
 396 * The refs we are going to fetch are in to_fetch (nr_heads in
 397 * total).  If running
 398 *
 399 *  $ git rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
 400 *
 401 * does not error out, that means everything reachable from the
 402 * refs we are going to fetch exists and is connected to some of
 403 * our existing refs.
 404 */
 405static int quickfetch(struct ref *ref_map)
 406{
 407        struct child_process revlist;
 408        struct ref *ref;
 409        char **argv;
 410        int i, err;
 411
 412        /*
 413         * If we are deepening a shallow clone we already have these
 414         * objects reachable.  Running rev-list here will return with
 415         * a good (0) exit status and we'll bypass the fetch that we
 416         * really need to perform.  Claiming failure now will ensure
 417         * we perform the network exchange to deepen our history.
 418         */
 419        if (depth)
 420                return -1;
 421
 422        for (i = 0, ref = ref_map; ref; ref = ref->next)
 423                i++;
 424        if (!i)
 425                return 0;
 426
 427        argv = xmalloc(sizeof(*argv) * (i + 6));
 428        i = 0;
 429        argv[i++] = xstrdup("rev-list");
 430        argv[i++] = xstrdup("--quiet");
 431        argv[i++] = xstrdup("--objects");
 432        for (ref = ref_map; ref; ref = ref->next)
 433                argv[i++] = xstrdup(sha1_to_hex(ref->old_sha1));
 434        argv[i++] = xstrdup("--not");
 435        argv[i++] = xstrdup("--all");
 436        argv[i++] = NULL;
 437
 438        memset(&revlist, 0, sizeof(revlist));
 439        revlist.argv = (const char**)argv;
 440        revlist.git_cmd = 1;
 441        revlist.no_stdin = 1;
 442        revlist.no_stdout = 1;
 443        revlist.no_stderr = 1;
 444        err = run_command(&revlist);
 445
 446        for (i = 0; argv[i]; i++)
 447                free(argv[i]);
 448        free(argv);
 449        return err;
 450}
 451
 452static int fetch_refs(struct transport *transport, struct ref *ref_map)
 453{
 454        int ret = quickfetch(ref_map);
 455        if (ret)
 456                ret = transport_fetch_refs(transport, ref_map);
 457        if (!ret)
 458                ret |= store_updated_refs(transport->url,
 459                                transport->remote->name,
 460                                ref_map);
 461        transport_unlock_pack(transport);
 462        return ret;
 463}
 464
 465static int add_existing(const char *refname, const unsigned char *sha1,
 466                        int flag, void *cbdata)
 467{
 468        struct string_list *list = (struct string_list *)cbdata;
 469        string_list_insert(refname, list);
 470        return 0;
 471}
 472
 473static int will_fetch(struct ref **head, const unsigned char *sha1)
 474{
 475        struct ref *rm = *head;
 476        while (rm) {
 477                if (!hashcmp(rm->old_sha1, sha1))
 478                        return 1;
 479                rm = rm->next;
 480        }
 481        return 0;
 482}
 483
 484static void find_non_local_tags(struct transport *transport,
 485                        struct ref **head,
 486                        struct ref ***tail)
 487{
 488        struct string_list existing_refs = { NULL, 0, 0, 0 };
 489        struct string_list new_refs = { NULL, 0, 0, 1 };
 490        char *ref_name;
 491        int ref_name_len;
 492        const unsigned char *ref_sha1;
 493        const struct ref *tag_ref;
 494        struct ref *rm = NULL;
 495        const struct ref *ref;
 496
 497        for_each_ref(add_existing, &existing_refs);
 498        for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 499                if (prefixcmp(ref->name, "refs/tags"))
 500                        continue;
 501
 502                ref_name = xstrdup(ref->name);
 503                ref_name_len = strlen(ref_name);
 504                ref_sha1 = ref->old_sha1;
 505
 506                if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
 507                        ref_name[ref_name_len - 3] = 0;
 508                        tag_ref = transport_get_remote_refs(transport);
 509                        while (tag_ref) {
 510                                if (!strcmp(tag_ref->name, ref_name)) {
 511                                        ref_sha1 = tag_ref->old_sha1;
 512                                        break;
 513                                }
 514                                tag_ref = tag_ref->next;
 515                        }
 516                }
 517
 518                if (!string_list_has_string(&existing_refs, ref_name) &&
 519                    !string_list_has_string(&new_refs, ref_name) &&
 520                    (has_sha1_file(ref->old_sha1) ||
 521                     will_fetch(head, ref->old_sha1))) {
 522                        string_list_insert(ref_name, &new_refs);
 523
 524                        rm = alloc_ref(ref_name);
 525                        rm->peer_ref = alloc_ref(ref_name);
 526                        hashcpy(rm->old_sha1, ref_sha1);
 527
 528                        **tail = rm;
 529                        *tail = &rm->next;
 530                }
 531                free(ref_name);
 532        }
 533        string_list_clear(&existing_refs, 0);
 534        string_list_clear(&new_refs, 0);
 535}
 536
 537static void check_not_current_branch(struct ref *ref_map)
 538{
 539        struct branch *current_branch = branch_get(NULL);
 540
 541        if (is_bare_repository() || !current_branch)
 542                return;
 543
 544        for (; ref_map; ref_map = ref_map->next)
 545                if (ref_map->peer_ref && !strcmp(current_branch->refname,
 546                                        ref_map->peer_ref->name))
 547                        die("Refusing to fetch into current branch");
 548}
 549
 550static int do_fetch(struct transport *transport,
 551                    struct refspec *refs, int ref_count)
 552{
 553        struct ref *ref_map;
 554        struct ref *rm;
 555        int autotags = (transport->remote->fetch_tags == 1);
 556        if (transport->remote->fetch_tags == 2 && tags != TAGS_UNSET)
 557                tags = TAGS_SET;
 558        if (transport->remote->fetch_tags == -1)
 559                tags = TAGS_UNSET;
 560
 561        if (!transport->get_refs_list || !transport->fetch)
 562                die("Don't know how to fetch from %s", transport->url);
 563
 564        /* if not appending, truncate FETCH_HEAD */
 565        if (!append) {
 566                char *filename = git_path("FETCH_HEAD");
 567                FILE *fp = fopen(filename, "w");
 568                if (!fp)
 569                        return error("cannot open %s: %s\n", filename, strerror(errno));
 570                fclose(fp);
 571        }
 572
 573        ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
 574        if (!update_head_ok)
 575                check_not_current_branch(ref_map);
 576
 577        for (rm = ref_map; rm; rm = rm->next) {
 578                if (rm->peer_ref)
 579                        read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
 580        }
 581
 582        if (tags == TAGS_DEFAULT && autotags)
 583                transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
 584        if (fetch_refs(transport, ref_map)) {
 585                free_refs(ref_map);
 586                return 1;
 587        }
 588        free_refs(ref_map);
 589
 590        /* if neither --no-tags nor --tags was specified, do automated tag
 591         * following ... */
 592        if (tags == TAGS_DEFAULT && autotags) {
 593                struct ref **tail = &ref_map;
 594                ref_map = NULL;
 595                find_non_local_tags(transport, &ref_map, &tail);
 596                if (ref_map) {
 597                        transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
 598                        transport_set_option(transport, TRANS_OPT_DEPTH, "0");
 599                        fetch_refs(transport, ref_map);
 600                }
 601                free_refs(ref_map);
 602        }
 603
 604        return 0;
 605}
 606
 607static void set_option(const char *name, const char *value)
 608{
 609        int r = transport_set_option(transport, name, value);
 610        if (r < 0)
 611                die("Option \"%s\" value \"%s\" is not valid for %s\n",
 612                        name, value, transport->url);
 613        if (r > 0)
 614                warning("Option \"%s\" is ignored for %s\n",
 615                        name, transport->url);
 616}
 617
 618int cmd_fetch(int argc, const char **argv, const char *prefix)
 619{
 620        struct remote *remote;
 621        int i;
 622        static const char **refs = NULL;
 623        int ref_nr = 0;
 624        int exit_code;
 625
 626        /* Record the command line for the reflog */
 627        strbuf_addstr(&default_rla, "fetch");
 628        for (i = 1; i < argc; i++)
 629                strbuf_addf(&default_rla, " %s", argv[i]);
 630
 631        argc = parse_options(argc, argv,
 632                             builtin_fetch_options, builtin_fetch_usage, 0);
 633
 634        if (argc == 0)
 635                remote = remote_get(NULL);
 636        else
 637                remote = remote_get(argv[0]);
 638
 639        transport = transport_get(remote, remote->url[0]);
 640        if (verbose >= 2)
 641                transport->verbose = 1;
 642        if (quiet)
 643                transport->verbose = -1;
 644        if (upload_pack)
 645                set_option(TRANS_OPT_UPLOADPACK, upload_pack);
 646        if (keep)
 647                set_option(TRANS_OPT_KEEP, "yes");
 648        if (depth)
 649                set_option(TRANS_OPT_DEPTH, depth);
 650
 651        if (!transport->url)
 652                die("Where do you want to fetch from today?");
 653
 654        if (argc > 1) {
 655                int j = 0;
 656                refs = xcalloc(argc + 1, sizeof(const char *));
 657                for (i = 1; i < argc; i++) {
 658                        if (!strcmp(argv[i], "tag")) {
 659                                char *ref;
 660                                i++;
 661                                if (i >= argc)
 662                                        die("You need to specify a tag name.");
 663                                ref = xmalloc(strlen(argv[i]) * 2 + 22);
 664                                strcpy(ref, "refs/tags/");
 665                                strcat(ref, argv[i]);
 666                                strcat(ref, ":refs/tags/");
 667                                strcat(ref, argv[i]);
 668                                refs[j++] = ref;
 669                        } else
 670                                refs[j++] = argv[i];
 671                }
 672                refs[j] = NULL;
 673                ref_nr = j;
 674        }
 675
 676        signal(SIGINT, unlock_pack_on_signal);
 677        atexit(unlock_pack);
 678        exit_code = do_fetch(transport,
 679                        parse_fetch_refspec(ref_nr, refs), ref_nr);
 680        transport_disconnect(transport);
 681        transport = NULL;
 682        return exit_code;
 683}