builtin-fetch.con commit change quoting in test t1006-cat-file.sh (6c41e21)
   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#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                        struct refspec refspec;
 132                        refspec.src = "refs/tags/";
 133                        refspec.dst = "refs/tags/";
 134                        refspec.pattern = 1;
 135                        refspec.force = 0;
 136                        get_fetch_map(remote_refs, &refspec, &tail, 0);
 137                }
 138        } else {
 139                /* Use the defaults */
 140                struct remote *remote = transport->remote;
 141                struct branch *branch = branch_get(NULL);
 142                int has_merge = branch_has_merge_config(branch);
 143                if (remote && (remote->fetch_refspec_nr || has_merge)) {
 144                        for (i = 0; i < remote->fetch_refspec_nr; i++) {
 145                                get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
 146                                if (remote->fetch[i].dst &&
 147                                    remote->fetch[i].dst[0])
 148                                        *autotags = 1;
 149                                if (!i && !has_merge && ref_map &&
 150                                    !remote->fetch[0].pattern)
 151                                        ref_map->merge = 1;
 152                        }
 153                        /*
 154                         * if the remote we're fetching from is the same
 155                         * as given in branch.<name>.remote, we add the
 156                         * ref given in branch.<name>.merge, too.
 157                         */
 158                        if (has_merge &&
 159                            !strcmp(branch->remote_name, remote->name))
 160                                add_merge_config(&ref_map, remote_refs, branch, &tail);
 161                } else {
 162                        ref_map = get_remote_ref(remote_refs, "HEAD");
 163                        if (!ref_map)
 164                                die("Couldn't find remote ref HEAD");
 165                        ref_map->merge = 1;
 166                        tail = &ref_map->next;
 167                }
 168        }
 169        if (tags == TAGS_DEFAULT && *autotags)
 170                find_non_local_tags(transport, &ref_map, &tail);
 171        ref_remove_duplicates(ref_map);
 172
 173        return ref_map;
 174}
 175
 176static int s_update_ref(const char *action,
 177                        struct ref *ref,
 178                        int check_old)
 179{
 180        char msg[1024];
 181        char *rla = getenv("GIT_REFLOG_ACTION");
 182        static struct ref_lock *lock;
 183
 184        if (!rla)
 185                rla = default_rla.buf;
 186        snprintf(msg, sizeof(msg), "%s: %s", rla, action);
 187        lock = lock_any_ref_for_update(ref->name,
 188                                       check_old ? ref->old_sha1 : NULL, 0);
 189        if (!lock)
 190                return 1;
 191        if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
 192                return 1;
 193        return 0;
 194}
 195
 196#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 197#define REFCOL_WIDTH  10
 198
 199static int update_local_ref(struct ref *ref,
 200                            const char *remote,
 201                            int verbose,
 202                            char *display)
 203{
 204        struct commit *current = NULL, *updated;
 205        enum object_type type;
 206        struct branch *current_branch = branch_get(NULL);
 207        const char *pretty_ref = ref->name + (
 208                !prefixcmp(ref->name, "refs/heads/") ? 11 :
 209                !prefixcmp(ref->name, "refs/tags/") ? 10 :
 210                !prefixcmp(ref->name, "refs/remotes/") ? 13 :
 211                0);
 212
 213        *display = 0;
 214        type = sha1_object_info(ref->new_sha1, NULL);
 215        if (type < 0)
 216                die("object %s not found", sha1_to_hex(ref->new_sha1));
 217
 218        if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
 219                if (verbose)
 220                        sprintf(display, "= %-*s %-*s -> %s", SUMMARY_WIDTH,
 221                                "[up to date]", REFCOL_WIDTH, remote,
 222                                pretty_ref);
 223                return 0;
 224        }
 225
 226        if (current_branch &&
 227            !strcmp(ref->name, current_branch->name) &&
 228            !(update_head_ok || is_bare_repository()) &&
 229            !is_null_sha1(ref->old_sha1)) {
 230                /*
 231                 * If this is the head, and it's not okay to update
 232                 * the head, and the old value of the head isn't empty...
 233                 */
 234                sprintf(display, "! %-*s %-*s -> %s  (can't fetch in current branch)",
 235                        SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 236                        pretty_ref);
 237                return 1;
 238        }
 239
 240        if (!is_null_sha1(ref->old_sha1) &&
 241            !prefixcmp(ref->name, "refs/tags/")) {
 242                sprintf(display, "- %-*s %-*s -> %s",
 243                        SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
 244                        pretty_ref);
 245                return s_update_ref("updating tag", ref, 0);
 246        }
 247
 248        current = lookup_commit_reference_gently(ref->old_sha1, 1);
 249        updated = lookup_commit_reference_gently(ref->new_sha1, 1);
 250        if (!current || !updated) {
 251                const char *msg;
 252                const char *what;
 253                if (!strncmp(ref->name, "refs/tags/", 10)) {
 254                        msg = "storing tag";
 255                        what = "[new tag]";
 256                }
 257                else {
 258                        msg = "storing head";
 259                        what = "[new branch]";
 260                }
 261
 262                sprintf(display, "* %-*s %-*s -> %s", SUMMARY_WIDTH, what,
 263                        REFCOL_WIDTH, remote, pretty_ref);
 264                return s_update_ref(msg, ref, 0);
 265        }
 266
 267        if (in_merge_bases(current, &updated, 1)) {
 268                char quickref[83];
 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                sprintf(display, "  %-*s %-*s -> %s", SUMMARY_WIDTH, quickref,
 273                        REFCOL_WIDTH, remote, pretty_ref);
 274                return s_update_ref("fast forward", ref, 1);
 275        } else if (force || ref->force) {
 276                char quickref[84];
 277                strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
 278                strcat(quickref, "...");
 279                strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
 280                sprintf(display, "+ %-*s %-*s -> %s  (forced update)",
 281                        SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote, pretty_ref);
 282                return s_update_ref("forced-update", ref, 1);
 283        } else {
 284                sprintf(display, "! %-*s %-*s -> %s  (non fast forward)",
 285                        SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
 286                        pretty_ref);
 287                return 1;
 288        }
 289}
 290
 291static int store_updated_refs(const char *url, struct ref *ref_map)
 292{
 293        FILE *fp;
 294        struct commit *commit;
 295        int url_len, i, note_len, shown_url = 0;
 296        char note[1024];
 297        const char *what, *kind;
 298        struct ref *rm;
 299        char *filename = git_path("FETCH_HEAD");
 300
 301        fp = fopen(filename, "a");
 302        if (!fp)
 303                return error("cannot open %s: %s\n", filename, strerror(errno));
 304        for (rm = ref_map; rm; rm = rm->next) {
 305                struct ref *ref = NULL;
 306
 307                if (rm->peer_ref) {
 308                        ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
 309                        strcpy(ref->name, rm->peer_ref->name);
 310                        hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
 311                        hashcpy(ref->new_sha1, rm->old_sha1);
 312                        ref->force = rm->peer_ref->force;
 313                }
 314
 315                commit = lookup_commit_reference_gently(rm->old_sha1, 1);
 316                if (!commit)
 317                        rm->merge = 0;
 318
 319                if (!strcmp(rm->name, "HEAD")) {
 320                        kind = "";
 321                        what = "";
 322                }
 323                else if (!prefixcmp(rm->name, "refs/heads/")) {
 324                        kind = "branch";
 325                        what = rm->name + 11;
 326                }
 327                else if (!prefixcmp(rm->name, "refs/tags/")) {
 328                        kind = "tag";
 329                        what = rm->name + 10;
 330                }
 331                else if (!prefixcmp(rm->name, "refs/remotes/")) {
 332                        kind = "remote branch";
 333                        what = rm->name + 13;
 334                }
 335                else {
 336                        kind = "";
 337                        what = rm->name;
 338                }
 339
 340                url_len = strlen(url);
 341                for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
 342                        ;
 343                url_len = i + 1;
 344                if (4 < i && !strncmp(".git", url + i - 3, 4))
 345                        url_len = i - 3;
 346
 347                note_len = 0;
 348                if (*what) {
 349                        if (*kind)
 350                                note_len += sprintf(note + note_len, "%s ",
 351                                                    kind);
 352                        note_len += sprintf(note + note_len, "'%s' of ", what);
 353                }
 354                note_len += sprintf(note + note_len, "%.*s", url_len, url);
 355                fprintf(fp, "%s\t%s\t%s\n",
 356                        sha1_to_hex(commit ? commit->object.sha1 :
 357                                    rm->old_sha1),
 358                        rm->merge ? "" : "not-for-merge",
 359                        note);
 360
 361                if (ref)
 362                        update_local_ref(ref, what, verbose, note);
 363                else if (verbose)
 364                        sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
 365                                SUMMARY_WIDTH, *kind ? kind : "branch",
 366                                 REFCOL_WIDTH, *what ? what : "HEAD");
 367                else
 368                        *note = '\0';
 369                if (*note) {
 370                        if (!shown_url) {
 371                                fprintf(stderr, "From %.*s\n",
 372                                                url_len, url);
 373                                shown_url = 1;
 374                        }
 375                        fprintf(stderr, " %s\n", note);
 376                }
 377        }
 378        fclose(fp);
 379        return 0;
 380}
 381
 382/*
 383 * We would want to bypass the object transfer altogether if
 384 * everything we are going to fetch already exists and connected
 385 * locally.
 386 *
 387 * The refs we are going to fetch are in to_fetch (nr_heads in
 388 * total).  If running
 389 *
 390 *  $ git-rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
 391 *
 392 * does not error out, that means everything reachable from the
 393 * refs we are going to fetch exists and is connected to some of
 394 * our existing refs.
 395 */
 396static int quickfetch(struct ref *ref_map)
 397{
 398        struct child_process revlist;
 399        struct ref *ref;
 400        char **argv;
 401        int i, err;
 402
 403        /*
 404         * If we are deepening a shallow clone we already have these
 405         * objects reachable.  Running rev-list here will return with
 406         * a good (0) exit status and we'll bypass the fetch that we
 407         * really need to perform.  Claiming failure now will ensure
 408         * we perform the network exchange to deepen our history.
 409         */
 410        if (depth)
 411                return -1;
 412
 413        for (i = 0, ref = ref_map; ref; ref = ref->next)
 414                i++;
 415        if (!i)
 416                return 0;
 417
 418        argv = xmalloc(sizeof(*argv) * (i + 6));
 419        i = 0;
 420        argv[i++] = xstrdup("rev-list");
 421        argv[i++] = xstrdup("--quiet");
 422        argv[i++] = xstrdup("--objects");
 423        for (ref = ref_map; ref; ref = ref->next)
 424                argv[i++] = xstrdup(sha1_to_hex(ref->old_sha1));
 425        argv[i++] = xstrdup("--not");
 426        argv[i++] = xstrdup("--all");
 427        argv[i++] = NULL;
 428
 429        memset(&revlist, 0, sizeof(revlist));
 430        revlist.argv = (const char**)argv;
 431        revlist.git_cmd = 1;
 432        revlist.no_stdin = 1;
 433        revlist.no_stdout = 1;
 434        revlist.no_stderr = 1;
 435        err = run_command(&revlist);
 436
 437        for (i = 0; argv[i]; i++)
 438                free(argv[i]);
 439        free(argv);
 440        return err;
 441}
 442
 443static int fetch_refs(struct transport *transport, struct ref *ref_map)
 444{
 445        int ret = quickfetch(ref_map);
 446        if (ret)
 447                ret = transport_fetch_refs(transport, ref_map);
 448        if (!ret)
 449                ret |= store_updated_refs(transport->url, ref_map);
 450        transport_unlock_pack(transport);
 451        return ret;
 452}
 453
 454static int add_existing(const char *refname, const unsigned char *sha1,
 455                        int flag, void *cbdata)
 456{
 457        struct path_list *list = (struct path_list *)cbdata;
 458        path_list_insert(refname, list);
 459        return 0;
 460}
 461
 462static int will_fetch(struct ref **head, const unsigned char *sha1)
 463{
 464        struct ref *rm = *head;
 465        while (rm) {
 466                if (!hashcmp(rm->old_sha1, sha1))
 467                        return 1;
 468                rm = rm->next;
 469        }
 470        return 0;
 471}
 472
 473static void find_non_local_tags(struct transport *transport,
 474                        struct ref **head,
 475                        struct ref ***tail)
 476{
 477        struct path_list existing_refs = { NULL, 0, 0, 0 };
 478        struct path_list new_refs = { NULL, 0, 0, 1 };
 479        char *ref_name;
 480        int ref_name_len;
 481        const unsigned char *ref_sha1;
 482        const struct ref *tag_ref;
 483        struct ref *rm = NULL;
 484        const struct ref *ref;
 485
 486        for_each_ref(add_existing, &existing_refs);
 487        for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
 488                if (prefixcmp(ref->name, "refs/tags"))
 489                        continue;
 490
 491                ref_name = xstrdup(ref->name);
 492                ref_name_len = strlen(ref_name);
 493                ref_sha1 = ref->old_sha1;
 494
 495                if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
 496                        ref_name[ref_name_len - 3] = 0;
 497                        tag_ref = transport_get_remote_refs(transport);
 498                        while (tag_ref) {
 499                                if (!strcmp(tag_ref->name, ref_name)) {
 500                                        ref_sha1 = tag_ref->old_sha1;
 501                                        break;
 502                                }
 503                                tag_ref = tag_ref->next;
 504                        }
 505                }
 506
 507                if (!path_list_has_path(&existing_refs, ref_name) &&
 508                    !path_list_has_path(&new_refs, ref_name) &&
 509                    (has_sha1_file(ref->old_sha1) ||
 510                     will_fetch(head, ref->old_sha1))) {
 511                        path_list_insert(ref_name, &new_refs);
 512
 513                        rm = alloc_ref(strlen(ref_name) + 1);
 514                        strcpy(rm->name, ref_name);
 515                        rm->peer_ref = alloc_ref(strlen(ref_name) + 1);
 516                        strcpy(rm->peer_ref->name, ref_name);
 517                        hashcpy(rm->old_sha1, ref_sha1);
 518
 519                        **tail = rm;
 520                        *tail = &rm->next;
 521                }
 522                free(ref_name);
 523        }
 524        path_list_clear(&existing_refs, 0);
 525        path_list_clear(&new_refs, 0);
 526}
 527
 528static int do_fetch(struct transport *transport,
 529                    struct refspec *refs, int ref_count)
 530{
 531        struct ref *ref_map;
 532        struct ref *rm;
 533        int autotags = (transport->remote->fetch_tags == 1);
 534        if (transport->remote->fetch_tags == 2 && tags != TAGS_UNSET)
 535                tags = TAGS_SET;
 536        if (transport->remote->fetch_tags == -1)
 537                tags = TAGS_UNSET;
 538
 539        if (!transport->get_refs_list || !transport->fetch)
 540                die("Don't know how to fetch from %s", transport->url);
 541
 542        /* if not appending, truncate FETCH_HEAD */
 543        if (!append) {
 544                char *filename = git_path("FETCH_HEAD");
 545                FILE *fp = fopen(filename, "w");
 546                if (!fp)
 547                        return error("cannot open %s: %s\n", filename, strerror(errno));
 548                fclose(fp);
 549        }
 550
 551        ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
 552
 553        for (rm = ref_map; rm; rm = rm->next) {
 554                if (rm->peer_ref)
 555                        read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
 556        }
 557
 558        if (tags == TAGS_DEFAULT && autotags)
 559                transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
 560        if (fetch_refs(transport, ref_map)) {
 561                free_refs(ref_map);
 562                return 1;
 563        }
 564        free_refs(ref_map);
 565
 566        /* if neither --no-tags nor --tags was specified, do automated tag
 567         * following ... */
 568        if (tags == TAGS_DEFAULT && autotags) {
 569                struct ref **tail = &ref_map;
 570                ref_map = NULL;
 571                find_non_local_tags(transport, &ref_map, &tail);
 572                if (ref_map) {
 573                        transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
 574                        transport_set_option(transport, TRANS_OPT_DEPTH, "0");
 575                        fetch_refs(transport, ref_map);
 576                }
 577                free_refs(ref_map);
 578        }
 579
 580        return 0;
 581}
 582
 583static void set_option(const char *name, const char *value)
 584{
 585        int r = transport_set_option(transport, name, value);
 586        if (r < 0)
 587                die("Option \"%s\" value \"%s\" is not valid for %s\n",
 588                        name, value, transport->url);
 589        if (r > 0)
 590                warning("Option \"%s\" is ignored for %s\n",
 591                        name, transport->url);
 592}
 593
 594int cmd_fetch(int argc, const char **argv, const char *prefix)
 595{
 596        struct remote *remote;
 597        int i;
 598        static const char **refs = NULL;
 599        int ref_nr = 0;
 600        int exit_code;
 601
 602        /* Record the command line for the reflog */
 603        strbuf_addstr(&default_rla, "fetch");
 604        for (i = 1; i < argc; i++)
 605                strbuf_addf(&default_rla, " %s", argv[i]);
 606
 607        argc = parse_options(argc, argv,
 608                             builtin_fetch_options, builtin_fetch_usage, 0);
 609
 610        if (argc == 0)
 611                remote = remote_get(NULL);
 612        else
 613                remote = remote_get(argv[0]);
 614
 615        transport = transport_get(remote, remote->url[0]);
 616        if (verbose >= 2)
 617                transport->verbose = 1;
 618        if (quiet)
 619                transport->verbose = -1;
 620        if (upload_pack)
 621                set_option(TRANS_OPT_UPLOADPACK, upload_pack);
 622        if (keep)
 623                set_option(TRANS_OPT_KEEP, "yes");
 624        if (depth)
 625                set_option(TRANS_OPT_DEPTH, depth);
 626
 627        if (!transport->url)
 628                die("Where do you want to fetch from today?");
 629
 630        if (argc > 1) {
 631                int j = 0;
 632                refs = xcalloc(argc + 1, sizeof(const char *));
 633                for (i = 1; i < argc; i++) {
 634                        if (!strcmp(argv[i], "tag")) {
 635                                char *ref;
 636                                i++;
 637                                if (i >= argc)
 638                                        die("You need to specify a tag name.");
 639                                ref = xmalloc(strlen(argv[i]) * 2 + 22);
 640                                strcpy(ref, "refs/tags/");
 641                                strcat(ref, argv[i]);
 642                                strcat(ref, ":refs/tags/");
 643                                strcat(ref, argv[i]);
 644                                refs[j++] = ref;
 645                        } else
 646                                refs[j++] = argv[i];
 647                }
 648                refs[j] = NULL;
 649                ref_nr = j;
 650        }
 651
 652        signal(SIGINT, unlock_pack_on_signal);
 653        atexit(unlock_pack);
 654        exit_code = do_fetch(transport,
 655                        parse_fetch_refspec(ref_nr, refs), ref_nr);
 656        transport_disconnect(transport);
 657        transport = NULL;
 658        return exit_code;
 659}