transport.con commit Merge branch 'jk/pack-objects-no-bitmap-when-splitting' (26a22d8)
   1#include "cache.h"
   2#include "transport.h"
   3#include "run-command.h"
   4#include "pkt-line.h"
   5#include "fetch-pack.h"
   6#include "remote.h"
   7#include "connect.h"
   8#include "send-pack.h"
   9#include "walker.h"
  10#include "bundle.h"
  11#include "dir.h"
  12#include "refs.h"
  13#include "branch.h"
  14#include "url.h"
  15#include "submodule.h"
  16#include "string-list.h"
  17#include "sha1-array.h"
  18
  19/* rsync support */
  20
  21/*
  22 * We copy packed-refs and refs/ into a temporary file, then read the
  23 * loose refs recursively (sorting whenever possible), and then inserting
  24 * those packed refs that are not yet in the list (not validating, but
  25 * assuming that the file is sorted).
  26 *
  27 * Appears refactoring this from refs.c is too cumbersome.
  28 */
  29
  30static int str_cmp(const void *a, const void *b)
  31{
  32        const char *s1 = a;
  33        const char *s2 = b;
  34
  35        return strcmp(s1, s2);
  36}
  37
  38/* path->buf + name_offset is expected to point to "refs/" */
  39
  40static int read_loose_refs(struct strbuf *path, int name_offset,
  41                struct ref **tail)
  42{
  43        DIR *dir = opendir(path->buf);
  44        struct dirent *de;
  45        struct {
  46                char **entries;
  47                int nr, alloc;
  48        } list;
  49        int i, pathlen;
  50
  51        if (!dir)
  52                return -1;
  53
  54        memset (&list, 0, sizeof(list));
  55
  56        while ((de = readdir(dir))) {
  57                if (is_dot_or_dotdot(de->d_name))
  58                        continue;
  59                ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  60                list.entries[list.nr++] = xstrdup(de->d_name);
  61        }
  62        closedir(dir);
  63
  64        /* sort the list */
  65
  66        qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  67
  68        pathlen = path->len;
  69        strbuf_addch(path, '/');
  70
  71        for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  72                strbuf_addstr(path, list.entries[i]);
  73                if (read_loose_refs(path, name_offset, tail)) {
  74                        int fd = open(path->buf, O_RDONLY);
  75                        char buffer[40];
  76                        struct ref *next;
  77
  78                        if (fd < 0)
  79                                continue;
  80                        next = alloc_ref(path->buf + name_offset);
  81                        if (read_in_full(fd, buffer, 40) != 40 ||
  82                                        get_sha1_hex(buffer, next->old_sha1)) {
  83                                close(fd);
  84                                free(next);
  85                                continue;
  86                        }
  87                        close(fd);
  88                        (*tail)->next = next;
  89                        *tail = next;
  90                }
  91        }
  92        strbuf_setlen(path, pathlen);
  93
  94        for (i = 0; i < list.nr; i++)
  95                free(list.entries[i]);
  96        free(list.entries);
  97
  98        return 0;
  99}
 100
 101/* insert the packed refs for which no loose refs were found */
 102
 103static void insert_packed_refs(const char *packed_refs, struct ref **list)
 104{
 105        FILE *f = fopen(packed_refs, "r");
 106        static char buffer[PATH_MAX];
 107
 108        if (!f)
 109                return;
 110
 111        for (;;) {
 112                int cmp = 0; /* assigned before used */
 113                int len;
 114
 115                if (!fgets(buffer, sizeof(buffer), f)) {
 116                        fclose(f);
 117                        return;
 118                }
 119
 120                if (hexval(buffer[0]) > 0xf)
 121                        continue;
 122                len = strlen(buffer);
 123                if (len && buffer[len - 1] == '\n')
 124                        buffer[--len] = '\0';
 125                if (len < 41)
 126                        continue;
 127                while ((*list)->next &&
 128                                (cmp = strcmp(buffer + 41,
 129                                      (*list)->next->name)) > 0)
 130                        list = &(*list)->next;
 131                if (!(*list)->next || cmp < 0) {
 132                        struct ref *next = alloc_ref(buffer + 41);
 133                        buffer[40] = '\0';
 134                        if (get_sha1_hex(buffer, next->old_sha1)) {
 135                                warning ("invalid SHA-1: %s", buffer);
 136                                free(next);
 137                                continue;
 138                        }
 139                        next->next = (*list)->next;
 140                        (*list)->next = next;
 141                        list = &(*list)->next;
 142                }
 143        }
 144}
 145
 146static void set_upstreams(struct transport *transport, struct ref *refs,
 147        int pretend)
 148{
 149        struct ref *ref;
 150        for (ref = refs; ref; ref = ref->next) {
 151                const char *localname;
 152                const char *tmp;
 153                const char *remotename;
 154                unsigned char sha[20];
 155                int flag = 0;
 156                /*
 157                 * Check suitability for tracking. Must be successful /
 158                 * already up-to-date ref create/modify (not delete).
 159                 */
 160                if (ref->status != REF_STATUS_OK &&
 161                        ref->status != REF_STATUS_UPTODATE)
 162                        continue;
 163                if (!ref->peer_ref)
 164                        continue;
 165                if (is_null_sha1(ref->new_sha1))
 166                        continue;
 167
 168                /* Follow symbolic refs (mainly for HEAD). */
 169                localname = ref->peer_ref->name;
 170                remotename = ref->name;
 171                tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
 172                                         sha, &flag);
 173                if (tmp && flag & REF_ISSYMREF &&
 174                        starts_with(tmp, "refs/heads/"))
 175                        localname = tmp;
 176
 177                /* Both source and destination must be local branches. */
 178                if (!localname || !starts_with(localname, "refs/heads/"))
 179                        continue;
 180                if (!remotename || !starts_with(remotename, "refs/heads/"))
 181                        continue;
 182
 183                if (!pretend)
 184                        install_branch_config(BRANCH_CONFIG_VERBOSE,
 185                                localname + 11, transport->remote->name,
 186                                remotename);
 187                else
 188                        printf("Would set upstream of '%s' to '%s' of '%s'\n",
 189                                localname + 11, remotename + 11,
 190                                transport->remote->name);
 191        }
 192}
 193
 194static const char *rsync_url(const char *url)
 195{
 196        if (!starts_with(url, "rsync://"))
 197                skip_prefix(url, "rsync:", &url);
 198        return url;
 199}
 200
 201static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 202{
 203        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 204        struct ref dummy = {NULL}, *tail = &dummy;
 205        struct child_process rsync = CHILD_PROCESS_INIT;
 206        const char *args[5];
 207        int temp_dir_len;
 208
 209        if (for_push)
 210                return NULL;
 211
 212        /* copy the refs to the temporary directory */
 213
 214        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 215        if (!mkdtemp(temp_dir.buf))
 216                die_errno ("Could not make temporary directory");
 217        temp_dir_len = temp_dir.len;
 218
 219        strbuf_addstr(&buf, rsync_url(transport->url));
 220        strbuf_addstr(&buf, "/refs");
 221
 222        rsync.argv = args;
 223        rsync.stdout_to_stderr = 1;
 224        args[0] = "rsync";
 225        args[1] = (transport->verbose > 1) ? "-rv" : "-r";
 226        args[2] = buf.buf;
 227        args[3] = temp_dir.buf;
 228        args[4] = NULL;
 229
 230        if (run_command(&rsync))
 231                die ("Could not run rsync to get refs");
 232
 233        strbuf_reset(&buf);
 234        strbuf_addstr(&buf, rsync_url(transport->url));
 235        strbuf_addstr(&buf, "/packed-refs");
 236
 237        args[2] = buf.buf;
 238
 239        if (run_command(&rsync))
 240                die ("Could not run rsync to get refs");
 241
 242        /* read the copied refs */
 243
 244        strbuf_addstr(&temp_dir, "/refs");
 245        read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 246        strbuf_setlen(&temp_dir, temp_dir_len);
 247
 248        tail = &dummy;
 249        strbuf_addstr(&temp_dir, "/packed-refs");
 250        insert_packed_refs(temp_dir.buf, &tail);
 251        strbuf_setlen(&temp_dir, temp_dir_len);
 252
 253        if (remove_dir_recursively(&temp_dir, 0))
 254                warning ("Error removing temporary directory %s.",
 255                                temp_dir.buf);
 256
 257        strbuf_release(&buf);
 258        strbuf_release(&temp_dir);
 259
 260        return dummy.next;
 261}
 262
 263static int fetch_objs_via_rsync(struct transport *transport,
 264                                int nr_objs, struct ref **to_fetch)
 265{
 266        struct child_process rsync = CHILD_PROCESS_INIT;
 267
 268        rsync.stdout_to_stderr = 1;
 269        argv_array_push(&rsync.args, "rsync");
 270        argv_array_push(&rsync.args, (transport->verbose > 1) ? "-rv" : "-r");
 271        argv_array_push(&rsync.args, "--ignore-existing");
 272        argv_array_push(&rsync.args, "--exclude");
 273        argv_array_push(&rsync.args, "info");
 274        argv_array_pushf(&rsync.args, "%s/objects/", rsync_url(transport->url));
 275        argv_array_push(&rsync.args, get_object_directory());
 276
 277        /* NEEDSWORK: handle one level of alternates */
 278        return run_command(&rsync);
 279}
 280
 281static int write_one_ref(const char *name, const unsigned char *sha1,
 282                int flags, void *data)
 283{
 284        struct strbuf *buf = data;
 285        int len = buf->len;
 286        FILE *f;
 287
 288        /* when called via for_each_ref(), flags is non-zero */
 289        if (flags && !starts_with(name, "refs/heads/") &&
 290                        !starts_with(name, "refs/tags/"))
 291                return 0;
 292
 293        strbuf_addstr(buf, name);
 294        if (safe_create_leading_directories(buf->buf) ||
 295                        !(f = fopen(buf->buf, "w")) ||
 296                        fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 297                        fclose(f))
 298                return error("problems writing temporary file %s", buf->buf);
 299        strbuf_setlen(buf, len);
 300        return 0;
 301}
 302
 303static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 304                int refspec_nr, const char **refspec)
 305{
 306        int i;
 307
 308        for (i = 0; i < refspec_nr; i++) {
 309                unsigned char sha1[20];
 310                char *ref;
 311
 312                if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 313                        return error("Could not get ref %s", refspec[i]);
 314
 315                if (write_one_ref(ref, sha1, 0, temp_dir)) {
 316                        free(ref);
 317                        return -1;
 318                }
 319                free(ref);
 320        }
 321        return 0;
 322}
 323
 324static int rsync_transport_push(struct transport *transport,
 325                int refspec_nr, const char **refspec, int flags)
 326{
 327        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 328        int result = 0, i;
 329        struct child_process rsync = CHILD_PROCESS_INIT;
 330        const char *args[10];
 331
 332        if (flags & TRANSPORT_PUSH_MIRROR)
 333                return error("rsync transport does not support mirror mode");
 334
 335        /* first push the objects */
 336
 337        strbuf_addstr(&buf, rsync_url(transport->url));
 338        strbuf_addch(&buf, '/');
 339
 340        rsync.argv = args;
 341        rsync.stdout_to_stderr = 1;
 342        i = 0;
 343        args[i++] = "rsync";
 344        args[i++] = "-a";
 345        if (flags & TRANSPORT_PUSH_DRY_RUN)
 346                args[i++] = "--dry-run";
 347        if (transport->verbose > 1)
 348                args[i++] = "-v";
 349        args[i++] = "--ignore-existing";
 350        args[i++] = "--exclude";
 351        args[i++] = "info";
 352        args[i++] = get_object_directory();
 353        args[i++] = buf.buf;
 354        args[i++] = NULL;
 355
 356        if (run_command(&rsync))
 357                return error("Could not push objects to %s",
 358                                rsync_url(transport->url));
 359
 360        /* copy the refs to the temporary directory; they could be packed. */
 361
 362        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 363        if (!mkdtemp(temp_dir.buf))
 364                die_errno ("Could not make temporary directory");
 365        strbuf_addch(&temp_dir, '/');
 366
 367        if (flags & TRANSPORT_PUSH_ALL) {
 368                if (for_each_ref(write_one_ref, &temp_dir))
 369                        return -1;
 370        } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 371                return -1;
 372
 373        i = 2;
 374        if (flags & TRANSPORT_PUSH_DRY_RUN)
 375                args[i++] = "--dry-run";
 376        if (!(flags & TRANSPORT_PUSH_FORCE))
 377                args[i++] = "--ignore-existing";
 378        args[i++] = temp_dir.buf;
 379        args[i++] = rsync_url(transport->url);
 380        args[i++] = NULL;
 381        if (run_command(&rsync))
 382                result = error("Could not push to %s",
 383                                rsync_url(transport->url));
 384
 385        if (remove_dir_recursively(&temp_dir, 0))
 386                warning ("Could not remove temporary directory %s.",
 387                                temp_dir.buf);
 388
 389        strbuf_release(&buf);
 390        strbuf_release(&temp_dir);
 391
 392        return result;
 393}
 394
 395struct bundle_transport_data {
 396        int fd;
 397        struct bundle_header header;
 398};
 399
 400static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 401{
 402        struct bundle_transport_data *data = transport->data;
 403        struct ref *result = NULL;
 404        int i;
 405
 406        if (for_push)
 407                return NULL;
 408
 409        if (data->fd > 0)
 410                close(data->fd);
 411        data->fd = read_bundle_header(transport->url, &data->header);
 412        if (data->fd < 0)
 413                die ("Could not read bundle '%s'.", transport->url);
 414        for (i = 0; i < data->header.references.nr; i++) {
 415                struct ref_list_entry *e = data->header.references.list + i;
 416                struct ref *ref = alloc_ref(e->name);
 417                hashcpy(ref->old_sha1, e->sha1);
 418                ref->next = result;
 419                result = ref;
 420        }
 421        return result;
 422}
 423
 424static int fetch_refs_from_bundle(struct transport *transport,
 425                               int nr_heads, struct ref **to_fetch)
 426{
 427        struct bundle_transport_data *data = transport->data;
 428        return unbundle(&data->header, data->fd,
 429                        transport->progress ? BUNDLE_VERBOSE : 0);
 430}
 431
 432static int close_bundle(struct transport *transport)
 433{
 434        struct bundle_transport_data *data = transport->data;
 435        if (data->fd > 0)
 436                close(data->fd);
 437        free(data);
 438        return 0;
 439}
 440
 441struct git_transport_data {
 442        struct git_transport_options options;
 443        struct child_process *conn;
 444        int fd[2];
 445        unsigned got_remote_heads : 1;
 446        struct sha1_array extra_have;
 447        struct sha1_array shallow;
 448};
 449
 450static int set_git_option(struct git_transport_options *opts,
 451                          const char *name, const char *value)
 452{
 453        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 454                opts->uploadpack = value;
 455                return 0;
 456        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 457                opts->receivepack = value;
 458                return 0;
 459        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 460                opts->thin = !!value;
 461                return 0;
 462        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 463                opts->followtags = !!value;
 464                return 0;
 465        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 466                opts->keep = !!value;
 467                return 0;
 468        } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 469                opts->update_shallow = !!value;
 470                return 0;
 471        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 472                if (!value)
 473                        opts->depth = 0;
 474                else {
 475                        char *end;
 476                        opts->depth = strtol(value, &end, 0);
 477                        if (*end)
 478                                die("transport: invalid depth option '%s'", value);
 479                }
 480                return 0;
 481        } else if (!strcmp(name, TRANS_OPT_PUSH_CERT)) {
 482                opts->push_cert = !!value;
 483                return 0;
 484        }
 485        return 1;
 486}
 487
 488static int connect_setup(struct transport *transport, int for_push, int verbose)
 489{
 490        struct git_transport_data *data = transport->data;
 491
 492        if (data->conn)
 493                return 0;
 494
 495        data->conn = git_connect(data->fd, transport->url,
 496                                 for_push ? data->options.receivepack :
 497                                 data->options.uploadpack,
 498                                 verbose ? CONNECT_VERBOSE : 0);
 499
 500        return 0;
 501}
 502
 503static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 504{
 505        struct git_transport_data *data = transport->data;
 506        struct ref *refs;
 507
 508        connect_setup(transport, for_push, 0);
 509        get_remote_heads(data->fd[0], NULL, 0, &refs,
 510                         for_push ? REF_NORMAL : 0,
 511                         &data->extra_have,
 512                         &data->shallow);
 513        data->got_remote_heads = 1;
 514
 515        return refs;
 516}
 517
 518static int fetch_refs_via_pack(struct transport *transport,
 519                               int nr_heads, struct ref **to_fetch)
 520{
 521        struct git_transport_data *data = transport->data;
 522        const struct ref *refs;
 523        char *dest = xstrdup(transport->url);
 524        struct fetch_pack_args args;
 525        struct ref *refs_tmp = NULL;
 526
 527        memset(&args, 0, sizeof(args));
 528        args.uploadpack = data->options.uploadpack;
 529        args.keep_pack = data->options.keep;
 530        args.lock_pack = 1;
 531        args.use_thin_pack = data->options.thin;
 532        args.include_tag = data->options.followtags;
 533        args.verbose = (transport->verbose > 1);
 534        args.quiet = (transport->verbose < 0);
 535        args.no_progress = !transport->progress;
 536        args.depth = data->options.depth;
 537        args.check_self_contained_and_connected =
 538                data->options.check_self_contained_and_connected;
 539        args.cloning = transport->cloning;
 540        args.update_shallow = data->options.update_shallow;
 541
 542        if (!data->got_remote_heads) {
 543                connect_setup(transport, 0, 0);
 544                get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 545                                 NULL, &data->shallow);
 546                data->got_remote_heads = 1;
 547        }
 548
 549        refs = fetch_pack(&args, data->fd, data->conn,
 550                          refs_tmp ? refs_tmp : transport->remote_refs,
 551                          dest, to_fetch, nr_heads, &data->shallow,
 552                          &transport->pack_lockfile);
 553        close(data->fd[0]);
 554        close(data->fd[1]);
 555        if (finish_connect(data->conn))
 556                refs = NULL;
 557        data->conn = NULL;
 558        data->got_remote_heads = 0;
 559        data->options.self_contained_and_connected =
 560                args.self_contained_and_connected;
 561
 562        free_refs(refs_tmp);
 563
 564        free(dest);
 565        return (refs ? 0 : -1);
 566}
 567
 568static int push_had_errors(struct ref *ref)
 569{
 570        for (; ref; ref = ref->next) {
 571                switch (ref->status) {
 572                case REF_STATUS_NONE:
 573                case REF_STATUS_UPTODATE:
 574                case REF_STATUS_OK:
 575                        break;
 576                default:
 577                        return 1;
 578                }
 579        }
 580        return 0;
 581}
 582
 583int transport_refs_pushed(struct ref *ref)
 584{
 585        for (; ref; ref = ref->next) {
 586                switch(ref->status) {
 587                case REF_STATUS_NONE:
 588                case REF_STATUS_UPTODATE:
 589                        break;
 590                default:
 591                        return 1;
 592                }
 593        }
 594        return 0;
 595}
 596
 597void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 598{
 599        struct refspec rs;
 600
 601        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 602                return;
 603
 604        rs.src = ref->name;
 605        rs.dst = NULL;
 606
 607        if (!remote_find_tracking(remote, &rs)) {
 608                if (verbose)
 609                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 610                if (ref->deletion) {
 611                        delete_ref(rs.dst, NULL, 0);
 612                } else
 613                        update_ref("update by push", rs.dst,
 614                                        ref->new_sha1, NULL, 0, 0);
 615                free(rs.dst);
 616        }
 617}
 618
 619static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 620{
 621        if (porcelain) {
 622                if (from)
 623                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 624                else
 625                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 626                if (msg)
 627                        fprintf(stdout, "%s (%s)\n", summary, msg);
 628                else
 629                        fprintf(stdout, "%s\n", summary);
 630        } else {
 631                fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 632                if (from)
 633                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 634                else
 635                        fputs(prettify_refname(to->name), stderr);
 636                if (msg) {
 637                        fputs(" (", stderr);
 638                        fputs(msg, stderr);
 639                        fputc(')', stderr);
 640                }
 641                fputc('\n', stderr);
 642        }
 643}
 644
 645static const char *status_abbrev(unsigned char sha1[20])
 646{
 647        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 648}
 649
 650static void print_ok_ref_status(struct ref *ref, int porcelain)
 651{
 652        if (ref->deletion)
 653                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 654        else if (is_null_sha1(ref->old_sha1))
 655                print_ref_status('*',
 656                        (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 657                        "[new branch]"),
 658                        ref, ref->peer_ref, NULL, porcelain);
 659        else {
 660                char quickref[84];
 661                char type;
 662                const char *msg;
 663
 664                strcpy(quickref, status_abbrev(ref->old_sha1));
 665                if (ref->forced_update) {
 666                        strcat(quickref, "...");
 667                        type = '+';
 668                        msg = "forced update";
 669                } else {
 670                        strcat(quickref, "..");
 671                        type = ' ';
 672                        msg = NULL;
 673                }
 674                strcat(quickref, status_abbrev(ref->new_sha1));
 675
 676                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 677        }
 678}
 679
 680static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 681{
 682        if (!count)
 683                fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
 684
 685        switch(ref->status) {
 686        case REF_STATUS_NONE:
 687                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 688                break;
 689        case REF_STATUS_REJECT_NODELETE:
 690                print_ref_status('!', "[rejected]", ref, NULL,
 691                                                 "remote does not support deleting refs", porcelain);
 692                break;
 693        case REF_STATUS_UPTODATE:
 694                print_ref_status('=', "[up to date]", ref,
 695                                                 ref->peer_ref, NULL, porcelain);
 696                break;
 697        case REF_STATUS_REJECT_NONFASTFORWARD:
 698                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 699                                                 "non-fast-forward", porcelain);
 700                break;
 701        case REF_STATUS_REJECT_ALREADY_EXISTS:
 702                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 703                                                 "already exists", porcelain);
 704                break;
 705        case REF_STATUS_REJECT_FETCH_FIRST:
 706                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 707                                                 "fetch first", porcelain);
 708                break;
 709        case REF_STATUS_REJECT_NEEDS_FORCE:
 710                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 711                                                 "needs force", porcelain);
 712                break;
 713        case REF_STATUS_REJECT_STALE:
 714                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 715                                                 "stale info", porcelain);
 716                break;
 717        case REF_STATUS_REJECT_SHALLOW:
 718                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 719                                                 "new shallow roots not allowed", porcelain);
 720                break;
 721        case REF_STATUS_REMOTE_REJECT:
 722                print_ref_status('!', "[remote rejected]", ref,
 723                                                 ref->deletion ? NULL : ref->peer_ref,
 724                                                 ref->remote_status, porcelain);
 725                break;
 726        case REF_STATUS_EXPECTING_REPORT:
 727                print_ref_status('!', "[remote failure]", ref,
 728                                                 ref->deletion ? NULL : ref->peer_ref,
 729                                                 "remote failed to report status", porcelain);
 730                break;
 731        case REF_STATUS_OK:
 732                print_ok_ref_status(ref, porcelain);
 733                break;
 734        }
 735
 736        return 1;
 737}
 738
 739void transport_print_push_status(const char *dest, struct ref *refs,
 740                                  int verbose, int porcelain, unsigned int *reject_reasons)
 741{
 742        struct ref *ref;
 743        int n = 0;
 744        unsigned char head_sha1[20];
 745        char *head;
 746
 747        head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
 748
 749        if (verbose) {
 750                for (ref = refs; ref; ref = ref->next)
 751                        if (ref->status == REF_STATUS_UPTODATE)
 752                                n += print_one_push_status(ref, dest, n, porcelain);
 753        }
 754
 755        for (ref = refs; ref; ref = ref->next)
 756                if (ref->status == REF_STATUS_OK)
 757                        n += print_one_push_status(ref, dest, n, porcelain);
 758
 759        *reject_reasons = 0;
 760        for (ref = refs; ref; ref = ref->next) {
 761                if (ref->status != REF_STATUS_NONE &&
 762                    ref->status != REF_STATUS_UPTODATE &&
 763                    ref->status != REF_STATUS_OK)
 764                        n += print_one_push_status(ref, dest, n, porcelain);
 765                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 766                        if (head != NULL && !strcmp(head, ref->name))
 767                                *reject_reasons |= REJECT_NON_FF_HEAD;
 768                        else
 769                                *reject_reasons |= REJECT_NON_FF_OTHER;
 770                } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 771                        *reject_reasons |= REJECT_ALREADY_EXISTS;
 772                } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 773                        *reject_reasons |= REJECT_FETCH_FIRST;
 774                } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 775                        *reject_reasons |= REJECT_NEEDS_FORCE;
 776                }
 777        }
 778}
 779
 780void transport_verify_remote_names(int nr_heads, const char **heads)
 781{
 782        int i;
 783
 784        for (i = 0; i < nr_heads; i++) {
 785                const char *local = heads[i];
 786                const char *remote = strrchr(heads[i], ':');
 787
 788                if (*local == '+')
 789                        local++;
 790
 791                /* A matching refspec is okay.  */
 792                if (remote == local && remote[1] == '\0')
 793                        continue;
 794
 795                remote = remote ? (remote + 1) : local;
 796                if (check_refname_format(remote,
 797                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 798                        die("remote part of refspec is not a valid name in %s",
 799                                heads[i]);
 800        }
 801}
 802
 803static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 804{
 805        struct git_transport_data *data = transport->data;
 806        struct send_pack_args args;
 807        int ret;
 808
 809        if (!data->got_remote_heads) {
 810                struct ref *tmp_refs;
 811                connect_setup(transport, 1, 0);
 812
 813                get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 814                                 NULL, &data->shallow);
 815                data->got_remote_heads = 1;
 816        }
 817
 818        memset(&args, 0, sizeof(args));
 819        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 820        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 821        args.use_thin_pack = data->options.thin;
 822        args.verbose = (transport->verbose > 0);
 823        args.quiet = (transport->verbose < 0);
 824        args.progress = transport->progress;
 825        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 826        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 827        args.push_cert = !!(flags & TRANSPORT_PUSH_CERT);
 828        args.url = transport->url;
 829
 830        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 831                        &data->extra_have);
 832
 833        close(data->fd[1]);
 834        close(data->fd[0]);
 835        ret |= finish_connect(data->conn);
 836        data->conn = NULL;
 837        data->got_remote_heads = 0;
 838
 839        return ret;
 840}
 841
 842static int connect_git(struct transport *transport, const char *name,
 843                       const char *executable, int fd[2])
 844{
 845        struct git_transport_data *data = transport->data;
 846        data->conn = git_connect(data->fd, transport->url,
 847                                 executable, 0);
 848        fd[0] = data->fd[0];
 849        fd[1] = data->fd[1];
 850        return 0;
 851}
 852
 853static int disconnect_git(struct transport *transport)
 854{
 855        struct git_transport_data *data = transport->data;
 856        if (data->conn) {
 857                if (data->got_remote_heads)
 858                        packet_flush(data->fd[1]);
 859                close(data->fd[0]);
 860                close(data->fd[1]);
 861                finish_connect(data->conn);
 862        }
 863
 864        free(data);
 865        return 0;
 866}
 867
 868void transport_take_over(struct transport *transport,
 869                         struct child_process *child)
 870{
 871        struct git_transport_data *data;
 872
 873        if (!transport->smart_options)
 874                die("Bug detected: Taking over transport requires non-NULL "
 875                    "smart_options field.");
 876
 877        data = xcalloc(1, sizeof(*data));
 878        data->options = *transport->smart_options;
 879        data->conn = child;
 880        data->fd[0] = data->conn->out;
 881        data->fd[1] = data->conn->in;
 882        data->got_remote_heads = 0;
 883        transport->data = data;
 884
 885        transport->set_option = NULL;
 886        transport->get_refs_list = get_refs_via_connect;
 887        transport->fetch = fetch_refs_via_pack;
 888        transport->push = NULL;
 889        transport->push_refs = git_transport_push;
 890        transport->disconnect = disconnect_git;
 891        transport->smart_options = &(data->options);
 892
 893        transport->cannot_reuse = 1;
 894}
 895
 896static int is_file(const char *url)
 897{
 898        struct stat buf;
 899        if (stat(url, &buf))
 900                return 0;
 901        return S_ISREG(buf.st_mode);
 902}
 903
 904static int external_specification_len(const char *url)
 905{
 906        return strchr(url, ':') - url;
 907}
 908
 909struct transport *transport_get(struct remote *remote, const char *url)
 910{
 911        const char *helper;
 912        struct transport *ret = xcalloc(1, sizeof(*ret));
 913
 914        ret->progress = isatty(2);
 915
 916        if (!remote)
 917                die("No remote provided to transport_get()");
 918
 919        ret->got_remote_refs = 0;
 920        ret->remote = remote;
 921        helper = remote->foreign_vcs;
 922
 923        if (!url && remote->url)
 924                url = remote->url[0];
 925        ret->url = url;
 926
 927        /* maybe it is a foreign URL? */
 928        if (url) {
 929                const char *p = url;
 930
 931                while (is_urlschemechar(p == url, *p))
 932                        p++;
 933                if (starts_with(p, "::"))
 934                        helper = xstrndup(url, p - url);
 935        }
 936
 937        if (helper) {
 938                transport_helper_init(ret, helper);
 939        } else if (starts_with(url, "rsync:")) {
 940                ret->get_refs_list = get_refs_via_rsync;
 941                ret->fetch = fetch_objs_via_rsync;
 942                ret->push = rsync_transport_push;
 943                ret->smart_options = NULL;
 944        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 945                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 946                ret->data = data;
 947                ret->get_refs_list = get_refs_from_bundle;
 948                ret->fetch = fetch_refs_from_bundle;
 949                ret->disconnect = close_bundle;
 950                ret->smart_options = NULL;
 951        } else if (!is_url(url)
 952                || starts_with(url, "file://")
 953                || starts_with(url, "git://")
 954                || starts_with(url, "ssh://")
 955                || starts_with(url, "git+ssh://")
 956                || starts_with(url, "ssh+git://")) {
 957                /* These are builtin smart transports. */
 958                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 959                ret->data = data;
 960                ret->set_option = NULL;
 961                ret->get_refs_list = get_refs_via_connect;
 962                ret->fetch = fetch_refs_via_pack;
 963                ret->push_refs = git_transport_push;
 964                ret->connect = connect_git;
 965                ret->disconnect = disconnect_git;
 966                ret->smart_options = &(data->options);
 967
 968                data->conn = NULL;
 969                data->got_remote_heads = 0;
 970        } else {
 971                /* Unknown protocol in URL. Pass to external handler. */
 972                int len = external_specification_len(url);
 973                char *handler = xmalloc(len + 1);
 974                handler[len] = 0;
 975                strncpy(handler, url, len);
 976                transport_helper_init(ret, handler);
 977        }
 978
 979        if (ret->smart_options) {
 980                ret->smart_options->thin = 1;
 981                ret->smart_options->uploadpack = "git-upload-pack";
 982                if (remote->uploadpack)
 983                        ret->smart_options->uploadpack = remote->uploadpack;
 984                ret->smart_options->receivepack = "git-receive-pack";
 985                if (remote->receivepack)
 986                        ret->smart_options->receivepack = remote->receivepack;
 987        }
 988
 989        return ret;
 990}
 991
 992int transport_set_option(struct transport *transport,
 993                         const char *name, const char *value)
 994{
 995        int git_reports = 1, protocol_reports = 1;
 996
 997        if (transport->smart_options)
 998                git_reports = set_git_option(transport->smart_options,
 999                                             name, value);
1000
1001        if (transport->set_option)
1002                protocol_reports = transport->set_option(transport, name,
1003                                                        value);
1004
1005        /* If either report is 0, report 0 (success). */
1006        if (!git_reports || !protocol_reports)
1007                return 0;
1008        /* If either reports -1 (invalid value), report -1. */
1009        if ((git_reports == -1) || (protocol_reports == -1))
1010                return -1;
1011        /* Otherwise if both report unknown, report unknown. */
1012        return 1;
1013}
1014
1015void transport_set_verbosity(struct transport *transport, int verbosity,
1016        int force_progress)
1017{
1018        if (verbosity >= 1)
1019                transport->verbose = verbosity <= 3 ? verbosity : 3;
1020        if (verbosity < 0)
1021                transport->verbose = -1;
1022
1023        /**
1024         * Rules used to determine whether to report progress (processing aborts
1025         * when a rule is satisfied):
1026         *
1027         *   . Report progress, if force_progress is 1 (ie. --progress).
1028         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1029         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1030         *   . Report progress if isatty(2) is 1.
1031         **/
1032        if (force_progress >= 0)
1033                transport->progress = !!force_progress;
1034        else
1035                transport->progress = verbosity >= 0 && isatty(2);
1036}
1037
1038static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1039{
1040        int i;
1041
1042        fprintf(stderr, "The following submodule paths contain changes that can\n"
1043                        "not be found on any remote:\n");
1044        for (i = 0; i < needs_pushing->nr; i++)
1045                printf("  %s\n", needs_pushing->items[i].string);
1046        fprintf(stderr, "\nPlease try\n\n"
1047                        "       git push --recurse-submodules=on-demand\n\n"
1048                        "or cd to the path and use\n\n"
1049                        "       git push\n\n"
1050                        "to push them to a remote.\n\n");
1051
1052        string_list_clear(needs_pushing, 0);
1053
1054        die("Aborting.");
1055}
1056
1057static int run_pre_push_hook(struct transport *transport,
1058                             struct ref *remote_refs)
1059{
1060        int ret = 0, x;
1061        struct ref *r;
1062        struct child_process proc = CHILD_PROCESS_INIT;
1063        struct strbuf buf;
1064        const char *argv[4];
1065
1066        if (!(argv[0] = find_hook("pre-push")))
1067                return 0;
1068
1069        argv[1] = transport->remote->name;
1070        argv[2] = transport->url;
1071        argv[3] = NULL;
1072
1073        proc.argv = argv;
1074        proc.in = -1;
1075
1076        if (start_command(&proc)) {
1077                finish_command(&proc);
1078                return -1;
1079        }
1080
1081        strbuf_init(&buf, 256);
1082
1083        for (r = remote_refs; r; r = r->next) {
1084                if (!r->peer_ref) continue;
1085                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1086                if (r->status == REF_STATUS_REJECT_STALE) continue;
1087                if (r->status == REF_STATUS_UPTODATE) continue;
1088
1089                strbuf_reset(&buf);
1090                strbuf_addf( &buf, "%s %s %s %s\n",
1091                         r->peer_ref->name, sha1_to_hex(r->new_sha1),
1092                         r->name, sha1_to_hex(r->old_sha1));
1093
1094                if (write_in_full(proc.in, buf.buf, buf.len) != buf.len) {
1095                        ret = -1;
1096                        break;
1097                }
1098        }
1099
1100        strbuf_release(&buf);
1101
1102        x = close(proc.in);
1103        if (!ret)
1104                ret = x;
1105
1106        x = finish_command(&proc);
1107        if (!ret)
1108                ret = x;
1109
1110        return ret;
1111}
1112
1113int transport_push(struct transport *transport,
1114                   int refspec_nr, const char **refspec, int flags,
1115                   unsigned int *reject_reasons)
1116{
1117        *reject_reasons = 0;
1118        transport_verify_remote_names(refspec_nr, refspec);
1119
1120        if (transport->push) {
1121                /* Maybe FIXME. But no important transport uses this case. */
1122                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1123                        die("This transport does not support using --set-upstream");
1124
1125                return transport->push(transport, refspec_nr, refspec, flags);
1126        } else if (transport->push_refs) {
1127                struct ref *remote_refs;
1128                struct ref *local_refs = get_local_heads();
1129                int match_flags = MATCH_REFS_NONE;
1130                int verbose = (transport->verbose > 0);
1131                int quiet = (transport->verbose < 0);
1132                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1133                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1134                int push_ret, ret, err;
1135
1136                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
1137                        return -1;
1138
1139                remote_refs = transport->get_refs_list(transport, 1);
1140
1141                if (flags & TRANSPORT_PUSH_ALL)
1142                        match_flags |= MATCH_REFS_ALL;
1143                if (flags & TRANSPORT_PUSH_MIRROR)
1144                        match_flags |= MATCH_REFS_MIRROR;
1145                if (flags & TRANSPORT_PUSH_PRUNE)
1146                        match_flags |= MATCH_REFS_PRUNE;
1147                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1148                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
1149
1150                if (match_push_refs(local_refs, &remote_refs,
1151                                    refspec_nr, refspec, match_flags)) {
1152                        return -1;
1153                }
1154
1155                if (transport->smart_options &&
1156                    transport->smart_options->cas &&
1157                    !is_empty_cas(transport->smart_options->cas))
1158                        apply_push_cas(transport->smart_options->cas,
1159                                       transport->remote, remote_refs);
1160
1161                set_ref_status_for_push(remote_refs,
1162                        flags & TRANSPORT_PUSH_MIRROR,
1163                        flags & TRANSPORT_PUSH_FORCE);
1164
1165                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1166                        if (run_pre_push_hook(transport, remote_refs))
1167                                return -1;
1168
1169                if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1170                        struct ref *ref = remote_refs;
1171                        for (; ref; ref = ref->next)
1172                                if (!is_null_sha1(ref->new_sha1) &&
1173                                    !push_unpushed_submodules(ref->new_sha1,
1174                                            transport->remote->name))
1175                                    die ("Failed to push all needed submodules!");
1176                }
1177
1178                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1179                              TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1180                        struct ref *ref = remote_refs;
1181                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1182
1183                        for (; ref; ref = ref->next)
1184                                if (!is_null_sha1(ref->new_sha1) &&
1185                                    find_unpushed_submodules(ref->new_sha1,
1186                                            transport->remote->name, &needs_pushing))
1187                                        die_with_unpushed_submodules(&needs_pushing);
1188                }
1189
1190                push_ret = transport->push_refs(transport, remote_refs, flags);
1191                err = push_had_errors(remote_refs);
1192                ret = push_ret | err;
1193
1194                if (!quiet || err)
1195                        transport_print_push_status(transport->url, remote_refs,
1196                                        verbose | porcelain, porcelain,
1197                                        reject_reasons);
1198
1199                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1200                        set_upstreams(transport, remote_refs, pretend);
1201
1202                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1203                        struct ref *ref;
1204                        for (ref = remote_refs; ref; ref = ref->next)
1205                                transport_update_tracking_ref(transport->remote, ref, verbose);
1206                }
1207
1208                if (porcelain && !push_ret)
1209                        puts("Done");
1210                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1211                        fprintf(stderr, "Everything up-to-date\n");
1212
1213                return ret;
1214        }
1215        return 1;
1216}
1217
1218const struct ref *transport_get_remote_refs(struct transport *transport)
1219{
1220        if (!transport->got_remote_refs) {
1221                transport->remote_refs = transport->get_refs_list(transport, 0);
1222                transport->got_remote_refs = 1;
1223        }
1224
1225        return transport->remote_refs;
1226}
1227
1228int transport_fetch_refs(struct transport *transport, struct ref *refs)
1229{
1230        int rc;
1231        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1232        struct ref **heads = NULL;
1233        struct ref *rm;
1234
1235        for (rm = refs; rm; rm = rm->next) {
1236                nr_refs++;
1237                if (rm->peer_ref &&
1238                    !is_null_sha1(rm->old_sha1) &&
1239                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1240                        continue;
1241                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1242                heads[nr_heads++] = rm;
1243        }
1244
1245        if (!nr_heads) {
1246                /*
1247                 * When deepening of a shallow repository is requested,
1248                 * then local and remote refs are likely to still be equal.
1249                 * Just feed them all to the fetch method in that case.
1250                 * This condition shouldn't be met in a non-deepening fetch
1251                 * (see builtin/fetch.c:quickfetch()).
1252                 */
1253                heads = xmalloc(nr_refs * sizeof(*heads));
1254                for (rm = refs; rm; rm = rm->next)
1255                        heads[nr_heads++] = rm;
1256        }
1257
1258        rc = transport->fetch(transport, nr_heads, heads);
1259
1260        free(heads);
1261        return rc;
1262}
1263
1264void transport_unlock_pack(struct transport *transport)
1265{
1266        if (transport->pack_lockfile) {
1267                unlink_or_warn(transport->pack_lockfile);
1268                free(transport->pack_lockfile);
1269                transport->pack_lockfile = NULL;
1270        }
1271}
1272
1273int transport_connect(struct transport *transport, const char *name,
1274                      const char *exec, int fd[2])
1275{
1276        if (transport->connect)
1277                return transport->connect(transport, name, exec, fd);
1278        else
1279                die("Operation not supported by protocol");
1280}
1281
1282int transport_disconnect(struct transport *transport)
1283{
1284        int ret = 0;
1285        if (transport->disconnect)
1286                ret = transport->disconnect(transport);
1287        free(transport);
1288        return ret;
1289}
1290
1291/*
1292 * Strip username (and password) from a URL and return
1293 * it in a newly allocated string.
1294 */
1295char *transport_anonymize_url(const char *url)
1296{
1297        char *anon_url, *scheme_prefix, *anon_part;
1298        size_t anon_len, prefix_len = 0;
1299
1300        anon_part = strchr(url, '@');
1301        if (url_is_local_not_ssh(url) || !anon_part)
1302                goto literal_copy;
1303
1304        anon_len = strlen(++anon_part);
1305        scheme_prefix = strstr(url, "://");
1306        if (!scheme_prefix) {
1307                if (!strchr(anon_part, ':'))
1308                        /* cannot be "me@there:/path/name" */
1309                        goto literal_copy;
1310        } else {
1311                const char *cp;
1312                /* make sure scheme is reasonable */
1313                for (cp = url; cp < scheme_prefix; cp++) {
1314                        switch (*cp) {
1315                                /* RFC 1738 2.1 */
1316                        case '+': case '.': case '-':
1317                                break; /* ok */
1318                        default:
1319                                if (isalnum(*cp))
1320                                        break;
1321                                /* it isn't */
1322                                goto literal_copy;
1323                        }
1324                }
1325                /* @ past the first slash does not count */
1326                cp = strchr(scheme_prefix + 3, '/');
1327                if (cp && cp < anon_part)
1328                        goto literal_copy;
1329                prefix_len = scheme_prefix - url + 3;
1330        }
1331        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1332        memcpy(anon_url, url, prefix_len);
1333        memcpy(anon_url + prefix_len, anon_part, anon_len);
1334        return anon_url;
1335literal_copy:
1336        return xstrdup(url);
1337}
1338
1339struct alternate_refs_data {
1340        alternate_ref_fn *fn;
1341        void *data;
1342};
1343
1344static int refs_from_alternate_cb(struct alternate_object_database *e,
1345                                  void *data)
1346{
1347        char *other;
1348        size_t len;
1349        struct remote *remote;
1350        struct transport *transport;
1351        const struct ref *extra;
1352        struct alternate_refs_data *cb = data;
1353
1354        e->name[-1] = '\0';
1355        other = xstrdup(real_path(e->base));
1356        e->name[-1] = '/';
1357        len = strlen(other);
1358
1359        while (other[len-1] == '/')
1360                other[--len] = '\0';
1361        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1362                goto out;
1363        /* Is this a git repository with refs? */
1364        memcpy(other + len - 8, "/refs", 6);
1365        if (!is_directory(other))
1366                goto out;
1367        other[len - 8] = '\0';
1368        remote = remote_get(other);
1369        transport = transport_get(remote, other);
1370        for (extra = transport_get_remote_refs(transport);
1371             extra;
1372             extra = extra->next)
1373                cb->fn(extra, cb->data);
1374        transport_disconnect(transport);
1375out:
1376        free(other);
1377        return 0;
1378}
1379
1380void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1381{
1382        struct alternate_refs_data cb;
1383        cb.fn = fn;
1384        cb.data = data;
1385        foreach_alt_odb(refs_from_alternate_cb, &cb);
1386}