Andrew's git / gitweb.git / transport.c
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transport.con commit Merge branch 'jc/maint-1.6.4-show-branch-default' into maint (04ce83e)
   1#include "cache.h"
   2#include "transport.h"
   3#include "run-command.h"
   4#ifndef NO_CURL
   5#include "http.h"
   6#endif
   7#include "pkt-line.h"
   8#include "fetch-pack.h"
   9#include "send-pack.h"
  10#include "walker.h"
  11#include "bundle.h"
  12#include "dir.h"
  13#include "refs.h"
  14
  15/* rsync support */
  16
  17/*
  18 * We copy packed-refs and refs/ into a temporary file, then read the
  19 * loose refs recursively (sorting whenever possible), and then inserting
  20 * those packed refs that are not yet in the list (not validating, but
  21 * assuming that the file is sorted).
  22 *
  23 * Appears refactoring this from refs.c is too cumbersome.
  24 */
  25
  26static int str_cmp(const void *a, const void *b)
  27{
  28        const char *s1 = a;
  29        const char *s2 = b;
  30
  31        return strcmp(s1, s2);
  32}
  33
  34/* path->buf + name_offset is expected to point to "refs/" */
  35
  36static int read_loose_refs(struct strbuf *path, int name_offset,
  37                struct ref **tail)
  38{
  39        DIR *dir = opendir(path->buf);
  40        struct dirent *de;
  41        struct {
  42                char **entries;
  43                int nr, alloc;
  44        } list;
  45        int i, pathlen;
  46
  47        if (!dir)
  48                return -1;
  49
  50        memset (&list, 0, sizeof(list));
  51
  52        while ((de = readdir(dir))) {
  53                if (is_dot_or_dotdot(de->d_name))
  54                        continue;
  55                ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  56                list.entries[list.nr++] = xstrdup(de->d_name);
  57        }
  58        closedir(dir);
  59
  60        /* sort the list */
  61
  62        qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  63
  64        pathlen = path->len;
  65        strbuf_addch(path, '/');
  66
  67        for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  68                strbuf_addstr(path, list.entries[i]);
  69                if (read_loose_refs(path, name_offset, tail)) {
  70                        int fd = open(path->buf, O_RDONLY);
  71                        char buffer[40];
  72                        struct ref *next;
  73
  74                        if (fd < 0)
  75                                continue;
  76                        next = alloc_ref(path->buf + name_offset);
  77                        if (read_in_full(fd, buffer, 40) != 40 ||
  78                                        get_sha1_hex(buffer, next->old_sha1)) {
  79                                close(fd);
  80                                free(next);
  81                                continue;
  82                        }
  83                        close(fd);
  84                        (*tail)->next = next;
  85                        *tail = next;
  86                }
  87        }
  88        strbuf_setlen(path, pathlen);
  89
  90        for (i = 0; i < list.nr; i++)
  91                free(list.entries[i]);
  92        free(list.entries);
  93
  94        return 0;
  95}
  96
  97/* insert the packed refs for which no loose refs were found */
  98
  99static void insert_packed_refs(const char *packed_refs, struct ref **list)
 100{
 101        FILE *f = fopen(packed_refs, "r");
 102        static char buffer[PATH_MAX];
 103
 104        if (!f)
 105                return;
 106
 107        for (;;) {
 108                int cmp = cmp, len;
 109
 110                if (!fgets(buffer, sizeof(buffer), f)) {
 111                        fclose(f);
 112                        return;
 113                }
 114
 115                if (hexval(buffer[0]) > 0xf)
 116                        continue;
 117                len = strlen(buffer);
 118                if (len && buffer[len - 1] == '\n')
 119                        buffer[--len] = '\0';
 120                if (len < 41)
 121                        continue;
 122                while ((*list)->next &&
 123                                (cmp = strcmp(buffer + 41,
 124                                      (*list)->next->name)) > 0)
 125                        list = &(*list)->next;
 126                if (!(*list)->next || cmp < 0) {
 127                        struct ref *next = alloc_ref(buffer + 41);
 128                        buffer[40] = '\0';
 129                        if (get_sha1_hex(buffer, next->old_sha1)) {
 130                                warning ("invalid SHA-1: %s", buffer);
 131                                free(next);
 132                                continue;
 133                        }
 134                        next->next = (*list)->next;
 135                        (*list)->next = next;
 136                        list = &(*list)->next;
 137                }
 138        }
 139}
 140
 141static const char *rsync_url(const char *url)
 142{
 143        return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 144}
 145
 146static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 147{
 148        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 149        struct ref dummy, *tail = &dummy;
 150        struct child_process rsync;
 151        const char *args[5];
 152        int temp_dir_len;
 153
 154        if (for_push)
 155                return NULL;
 156
 157        /* copy the refs to the temporary directory */
 158
 159        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 160        if (!mkdtemp(temp_dir.buf))
 161                die_errno ("Could not make temporary directory");
 162        temp_dir_len = temp_dir.len;
 163
 164        strbuf_addstr(&buf, rsync_url(transport->url));
 165        strbuf_addstr(&buf, "/refs");
 166
 167        memset(&rsync, 0, sizeof(rsync));
 168        rsync.argv = args;
 169        rsync.stdout_to_stderr = 1;
 170        args[0] = "rsync";
 171        args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 172        args[2] = buf.buf;
 173        args[3] = temp_dir.buf;
 174        args[4] = NULL;
 175
 176        if (run_command(&rsync))
 177                die ("Could not run rsync to get refs");
 178
 179        strbuf_reset(&buf);
 180        strbuf_addstr(&buf, rsync_url(transport->url));
 181        strbuf_addstr(&buf, "/packed-refs");
 182
 183        args[2] = buf.buf;
 184
 185        if (run_command(&rsync))
 186                die ("Could not run rsync to get refs");
 187
 188        /* read the copied refs */
 189
 190        strbuf_addstr(&temp_dir, "/refs");
 191        read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 192        strbuf_setlen(&temp_dir, temp_dir_len);
 193
 194        tail = &dummy;
 195        strbuf_addstr(&temp_dir, "/packed-refs");
 196        insert_packed_refs(temp_dir.buf, &tail);
 197        strbuf_setlen(&temp_dir, temp_dir_len);
 198
 199        if (remove_dir_recursively(&temp_dir, 0))
 200                warning ("Error removing temporary directory %s.",
 201                                temp_dir.buf);
 202
 203        strbuf_release(&buf);
 204        strbuf_release(&temp_dir);
 205
 206        return dummy.next;
 207}
 208
 209static int fetch_objs_via_rsync(struct transport *transport,
 210                                int nr_objs, const struct ref **to_fetch)
 211{
 212        struct strbuf buf = STRBUF_INIT;
 213        struct child_process rsync;
 214        const char *args[8];
 215        int result;
 216
 217        strbuf_addstr(&buf, rsync_url(transport->url));
 218        strbuf_addstr(&buf, "/objects/");
 219
 220        memset(&rsync, 0, sizeof(rsync));
 221        rsync.argv = args;
 222        rsync.stdout_to_stderr = 1;
 223        args[0] = "rsync";
 224        args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 225        args[2] = "--ignore-existing";
 226        args[3] = "--exclude";
 227        args[4] = "info";
 228        args[5] = buf.buf;
 229        args[6] = get_object_directory();
 230        args[7] = NULL;
 231
 232        /* NEEDSWORK: handle one level of alternates */
 233        result = run_command(&rsync);
 234
 235        strbuf_release(&buf);
 236
 237        return result;
 238}
 239
 240static int write_one_ref(const char *name, const unsigned char *sha1,
 241                int flags, void *data)
 242{
 243        struct strbuf *buf = data;
 244        int len = buf->len;
 245        FILE *f;
 246
 247        /* when called via for_each_ref(), flags is non-zero */
 248        if (flags && prefixcmp(name, "refs/heads/") &&
 249                        prefixcmp(name, "refs/tags/"))
 250                return 0;
 251
 252        strbuf_addstr(buf, name);
 253        if (safe_create_leading_directories(buf->buf) ||
 254                        !(f = fopen(buf->buf, "w")) ||
 255                        fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 256                        fclose(f))
 257                return error("problems writing temporary file %s", buf->buf);
 258        strbuf_setlen(buf, len);
 259        return 0;
 260}
 261
 262static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 263                int refspec_nr, const char **refspec)
 264{
 265        int i;
 266
 267        for (i = 0; i < refspec_nr; i++) {
 268                unsigned char sha1[20];
 269                char *ref;
 270
 271                if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 272                        return error("Could not get ref %s", refspec[i]);
 273
 274                if (write_one_ref(ref, sha1, 0, temp_dir)) {
 275                        free(ref);
 276                        return -1;
 277                }
 278                free(ref);
 279        }
 280        return 0;
 281}
 282
 283static int rsync_transport_push(struct transport *transport,
 284                int refspec_nr, const char **refspec, int flags)
 285{
 286        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 287        int result = 0, i;
 288        struct child_process rsync;
 289        const char *args[10];
 290
 291        if (flags & TRANSPORT_PUSH_MIRROR)
 292                return error("rsync transport does not support mirror mode");
 293
 294        /* first push the objects */
 295
 296        strbuf_addstr(&buf, rsync_url(transport->url));
 297        strbuf_addch(&buf, '/');
 298
 299        memset(&rsync, 0, sizeof(rsync));
 300        rsync.argv = args;
 301        rsync.stdout_to_stderr = 1;
 302        i = 0;
 303        args[i++] = "rsync";
 304        args[i++] = "-a";
 305        if (flags & TRANSPORT_PUSH_DRY_RUN)
 306                args[i++] = "--dry-run";
 307        if (transport->verbose > 0)
 308                args[i++] = "-v";
 309        args[i++] = "--ignore-existing";
 310        args[i++] = "--exclude";
 311        args[i++] = "info";
 312        args[i++] = get_object_directory();
 313        args[i++] = buf.buf;
 314        args[i++] = NULL;
 315
 316        if (run_command(&rsync))
 317                return error("Could not push objects to %s",
 318                                rsync_url(transport->url));
 319
 320        /* copy the refs to the temporary directory; they could be packed. */
 321
 322        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 323        if (!mkdtemp(temp_dir.buf))
 324                die_errno ("Could not make temporary directory");
 325        strbuf_addch(&temp_dir, '/');
 326
 327        if (flags & TRANSPORT_PUSH_ALL) {
 328                if (for_each_ref(write_one_ref, &temp_dir))
 329                        return -1;
 330        } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 331                return -1;
 332
 333        i = 2;
 334        if (flags & TRANSPORT_PUSH_DRY_RUN)
 335                args[i++] = "--dry-run";
 336        if (!(flags & TRANSPORT_PUSH_FORCE))
 337                args[i++] = "--ignore-existing";
 338        args[i++] = temp_dir.buf;
 339        args[i++] = rsync_url(transport->url);
 340        args[i++] = NULL;
 341        if (run_command(&rsync))
 342                result = error("Could not push to %s",
 343                                rsync_url(transport->url));
 344
 345        if (remove_dir_recursively(&temp_dir, 0))
 346                warning ("Could not remove temporary directory %s.",
 347                                temp_dir.buf);
 348
 349        strbuf_release(&buf);
 350        strbuf_release(&temp_dir);
 351
 352        return result;
 353}
 354
 355/* Generic functions for using commit walkers */
 356
 357#ifndef NO_CURL /* http fetch is the only user */
 358static int fetch_objs_via_walker(struct transport *transport,
 359                                 int nr_objs, const struct ref **to_fetch)
 360{
 361        char *dest = xstrdup(transport->url);
 362        struct walker *walker = transport->data;
 363        char **objs = xmalloc(nr_objs * sizeof(*objs));
 364        int i;
 365
 366        walker->get_all = 1;
 367        walker->get_tree = 1;
 368        walker->get_history = 1;
 369        walker->get_verbosely = transport->verbose >= 0;
 370        walker->get_recover = 0;
 371
 372        for (i = 0; i < nr_objs; i++)
 373                objs[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
 374
 375        if (walker_fetch(walker, nr_objs, objs, NULL, NULL))
 376                die("Fetch failed.");
 377
 378        for (i = 0; i < nr_objs; i++)
 379                free(objs[i]);
 380        free(objs);
 381        free(dest);
 382        return 0;
 383}
 384#endif /* NO_CURL */
 385
 386static int disconnect_walker(struct transport *transport)
 387{
 388        struct walker *walker = transport->data;
 389        if (walker)
 390                walker_free(walker);
 391        return 0;
 392}
 393
 394#ifndef NO_CURL
 395static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
 396{
 397        const char **argv;
 398        int argc;
 399        int err;
 400
 401        if (flags & TRANSPORT_PUSH_MIRROR)
 402                return error("http transport does not support mirror mode");
 403
 404        argv = xmalloc((refspec_nr + 12) * sizeof(char *));
 405        argv[0] = "http-push";
 406        argc = 1;
 407        if (flags & TRANSPORT_PUSH_ALL)
 408                argv[argc++] = "--all";
 409        if (flags & TRANSPORT_PUSH_FORCE)
 410                argv[argc++] = "--force";
 411        if (flags & TRANSPORT_PUSH_DRY_RUN)
 412                argv[argc++] = "--dry-run";
 413        if (flags & TRANSPORT_PUSH_VERBOSE)
 414                argv[argc++] = "--verbose";
 415        argv[argc++] = transport->url;
 416        while (refspec_nr--)
 417                argv[argc++] = *refspec++;
 418        argv[argc] = NULL;
 419        err = run_command_v_opt(argv, RUN_GIT_CMD);
 420        switch (err) {
 421        case -ERR_RUN_COMMAND_FORK:
 422                error("unable to fork for %s", argv[0]);
 423        case -ERR_RUN_COMMAND_EXEC:
 424                error("unable to exec %s", argv[0]);
 425                break;
 426        case -ERR_RUN_COMMAND_WAITPID:
 427        case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 428        case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 429        case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 430                error("%s died with strange error", argv[0]);
 431        }
 432        return !!err;
 433}
 434
 435static struct ref *get_refs_via_curl(struct transport *transport, int for_push)
 436{
 437        struct strbuf buffer = STRBUF_INIT;
 438        char *data, *start, *mid;
 439        char *ref_name;
 440        char *refs_url;
 441        int i = 0;
 442        int http_ret;
 443
 444        struct ref *refs = NULL;
 445        struct ref *ref = NULL;
 446        struct ref *last_ref = NULL;
 447
 448        struct walker *walker;
 449
 450        if (for_push)
 451                return NULL;
 452
 453        if (!transport->data)
 454                transport->data = get_http_walker(transport->url,
 455                                                transport->remote);
 456
 457        walker = transport->data;
 458
 459        refs_url = xmalloc(strlen(transport->url) + 11);
 460        sprintf(refs_url, "%s/info/refs", transport->url);
 461
 462        http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
 463        switch (http_ret) {
 464        case HTTP_OK:
 465                break;
 466        case HTTP_MISSING_TARGET:
 467                die("%s not found: did you run git update-server-info on the"
 468                    " server?", refs_url);
 469        default:
 470                http_error(refs_url, http_ret);
 471                die("HTTP request failed");
 472        }
 473
 474        data = buffer.buf;
 475        start = NULL;
 476        mid = data;
 477        while (i < buffer.len) {
 478                if (!start)
 479                        start = &data[i];
 480                if (data[i] == '\t')
 481                        mid = &data[i];
 482                if (data[i] == '\n') {
 483                        data[i] = 0;
 484                        ref_name = mid + 1;
 485                        ref = xmalloc(sizeof(struct ref) +
 486                                      strlen(ref_name) + 1);
 487                        memset(ref, 0, sizeof(struct ref));
 488                        strcpy(ref->name, ref_name);
 489                        get_sha1_hex(start, ref->old_sha1);
 490                        if (!refs)
 491                                refs = ref;
 492                        if (last_ref)
 493                                last_ref->next = ref;
 494                        last_ref = ref;
 495                        start = NULL;
 496                }
 497                i++;
 498        }
 499
 500        strbuf_release(&buffer);
 501
 502        ref = alloc_ref("HEAD");
 503        if (!walker->fetch_ref(walker, ref) &&
 504            !resolve_remote_symref(ref, refs)) {
 505                ref->next = refs;
 506                refs = ref;
 507        } else {
 508                free(ref);
 509        }
 510
 511        strbuf_release(&buffer);
 512        free(refs_url);
 513        return refs;
 514}
 515
 516static int fetch_objs_via_curl(struct transport *transport,
 517                                 int nr_objs, const struct ref **to_fetch)
 518{
 519        if (!transport->data)
 520                transport->data = get_http_walker(transport->url,
 521                                                transport->remote);
 522        return fetch_objs_via_walker(transport, nr_objs, to_fetch);
 523}
 524
 525#endif
 526
 527struct bundle_transport_data {
 528        int fd;
 529        struct bundle_header header;
 530};
 531
 532static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 533{
 534        struct bundle_transport_data *data = transport->data;
 535        struct ref *result = NULL;
 536        int i;
 537
 538        if (for_push)
 539                return NULL;
 540
 541        if (data->fd > 0)
 542                close(data->fd);
 543        data->fd = read_bundle_header(transport->url, &data->header);
 544        if (data->fd < 0)
 545                die ("Could not read bundle '%s'.", transport->url);
 546        for (i = 0; i < data->header.references.nr; i++) {
 547                struct ref_list_entry *e = data->header.references.list + i;
 548                struct ref *ref = alloc_ref(e->name);
 549                hashcpy(ref->old_sha1, e->sha1);
 550                ref->next = result;
 551                result = ref;
 552        }
 553        return result;
 554}
 555
 556static int fetch_refs_from_bundle(struct transport *transport,
 557                               int nr_heads, const struct ref **to_fetch)
 558{
 559        struct bundle_transport_data *data = transport->data;
 560        return unbundle(&data->header, data->fd);
 561}
 562
 563static int close_bundle(struct transport *transport)
 564{
 565        struct bundle_transport_data *data = transport->data;
 566        if (data->fd > 0)
 567                close(data->fd);
 568        free(data);
 569        return 0;
 570}
 571
 572struct git_transport_data {
 573        unsigned thin : 1;
 574        unsigned keep : 1;
 575        unsigned followtags : 1;
 576        int depth;
 577        struct child_process *conn;
 578        int fd[2];
 579        const char *uploadpack;
 580        const char *receivepack;
 581        struct extra_have_objects extra_have;
 582};
 583
 584static int set_git_option(struct transport *connection,
 585                          const char *name, const char *value)
 586{
 587        struct git_transport_data *data = connection->data;
 588        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 589                data->uploadpack = value;
 590                return 0;
 591        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 592                data->receivepack = value;
 593                return 0;
 594        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 595                data->thin = !!value;
 596                return 0;
 597        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 598                data->followtags = !!value;
 599                return 0;
 600        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 601                data->keep = !!value;
 602                return 0;
 603        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 604                if (!value)
 605                        data->depth = 0;
 606                else
 607                        data->depth = atoi(value);
 608                return 0;
 609        }
 610        return 1;
 611}
 612
 613static int connect_setup(struct transport *transport, int for_push, int verbose)
 614{
 615        struct git_transport_data *data = transport->data;
 616        data->conn = git_connect(data->fd, transport->url,
 617                                 for_push ? data->receivepack : data->uploadpack,
 618                                 verbose ? CONNECT_VERBOSE : 0);
 619        return 0;
 620}
 621
 622static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 623{
 624        struct git_transport_data *data = transport->data;
 625        struct ref *refs;
 626
 627        connect_setup(transport, for_push, 0);
 628        get_remote_heads(data->fd[0], &refs, 0, NULL,
 629                         for_push ? REF_NORMAL : 0, &data->extra_have);
 630
 631        return refs;
 632}
 633
 634static int fetch_refs_via_pack(struct transport *transport,
 635                               int nr_heads, const struct ref **to_fetch)
 636{
 637        struct git_transport_data *data = transport->data;
 638        char **heads = xmalloc(nr_heads * sizeof(*heads));
 639        char **origh = xmalloc(nr_heads * sizeof(*origh));
 640        const struct ref *refs;
 641        char *dest = xstrdup(transport->url);
 642        struct fetch_pack_args args;
 643        int i;
 644        struct ref *refs_tmp = NULL;
 645
 646        memset(&args, 0, sizeof(args));
 647        args.uploadpack = data->uploadpack;
 648        args.keep_pack = data->keep;
 649        args.lock_pack = 1;
 650        args.use_thin_pack = data->thin;
 651        args.include_tag = data->followtags;
 652        args.verbose = (transport->verbose > 0);
 653        args.quiet = (transport->verbose < 0);
 654        args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 655        args.depth = data->depth;
 656
 657        for (i = 0; i < nr_heads; i++)
 658                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 659
 660        if (!data->conn) {
 661                connect_setup(transport, 0, 0);
 662                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 663        }
 664
 665        refs = fetch_pack(&args, data->fd, data->conn,
 666                          refs_tmp ? refs_tmp : transport->remote_refs,
 667                          dest, nr_heads, heads, &transport->pack_lockfile);
 668        close(data->fd[0]);
 669        close(data->fd[1]);
 670        if (finish_connect(data->conn))
 671                refs = NULL;
 672        data->conn = NULL;
 673
 674        free_refs(refs_tmp);
 675
 676        for (i = 0; i < nr_heads; i++)
 677                free(origh[i]);
 678        free(origh);
 679        free(heads);
 680        free(dest);
 681        return (refs ? 0 : -1);
 682}
 683
 684static int refs_pushed(struct ref *ref)
 685{
 686        for (; ref; ref = ref->next) {
 687                switch(ref->status) {
 688                case REF_STATUS_NONE:
 689                case REF_STATUS_UPTODATE:
 690                        break;
 691                default:
 692                        return 1;
 693                }
 694        }
 695        return 0;
 696}
 697
 698static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 699{
 700        struct refspec rs;
 701
 702        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 703                return;
 704
 705        rs.src = ref->name;
 706        rs.dst = NULL;
 707
 708        if (!remote_find_tracking(remote, &rs)) {
 709                if (verbose)
 710                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 711                if (ref->deletion) {
 712                        delete_ref(rs.dst, NULL, 0);
 713                } else
 714                        update_ref("update by push", rs.dst,
 715                                        ref->new_sha1, NULL, 0, 0);
 716                free(rs.dst);
 717        }
 718}
 719
 720#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 721
 722static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 723{
 724        if (porcelain) {
 725                if (from)
 726                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 727                else
 728                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 729                if (msg)
 730                        fprintf(stdout, "%s (%s)\n", summary, msg);
 731                else
 732                        fprintf(stdout, "%s\n", summary);
 733        } else {
 734                fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 735                if (from)
 736                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 737                else
 738                        fputs(prettify_refname(to->name), stderr);
 739                if (msg) {
 740                        fputs(" (", stderr);
 741                        fputs(msg, stderr);
 742                        fputc(')', stderr);
 743                }
 744                fputc('\n', stderr);
 745        }
 746}
 747
 748static const char *status_abbrev(unsigned char sha1[20])
 749{
 750        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 751}
 752
 753static void print_ok_ref_status(struct ref *ref, int porcelain)
 754{
 755        if (ref->deletion)
 756                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 757        else if (is_null_sha1(ref->old_sha1))
 758                print_ref_status('*',
 759                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 760                        "[new branch]"),
 761                        ref, ref->peer_ref, NULL, porcelain);
 762        else {
 763                char quickref[84];
 764                char type;
 765                const char *msg;
 766
 767                strcpy(quickref, status_abbrev(ref->old_sha1));
 768                if (ref->nonfastforward) {
 769                        strcat(quickref, "...");
 770                        type = '+';
 771                        msg = "forced update";
 772                } else {
 773                        strcat(quickref, "..");
 774                        type = ' ';
 775                        msg = NULL;
 776                }
 777                strcat(quickref, status_abbrev(ref->new_sha1));
 778
 779                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 780        }
 781}
 782
 783static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 784{
 785        if (!count)
 786                fprintf(stderr, "To %s\n", dest);
 787
 788        switch(ref->status) {
 789        case REF_STATUS_NONE:
 790                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 791                break;
 792        case REF_STATUS_REJECT_NODELETE:
 793                print_ref_status('!', "[rejected]", ref, NULL,
 794                                                 "remote does not support deleting refs", porcelain);
 795                break;
 796        case REF_STATUS_UPTODATE:
 797                print_ref_status('=', "[up to date]", ref,
 798                                                 ref->peer_ref, NULL, porcelain);
 799                break;
 800        case REF_STATUS_REJECT_NONFASTFORWARD:
 801                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 802                                                 "non-fast forward", porcelain);
 803                break;
 804        case REF_STATUS_REMOTE_REJECT:
 805                print_ref_status('!', "[remote rejected]", ref,
 806                                                 ref->deletion ? NULL : ref->peer_ref,
 807                                                 ref->remote_status, porcelain);
 808                break;
 809        case REF_STATUS_EXPECTING_REPORT:
 810                print_ref_status('!', "[remote failure]", ref,
 811                                                 ref->deletion ? NULL : ref->peer_ref,
 812                                                 "remote failed to report status", porcelain);
 813                break;
 814        case REF_STATUS_OK:
 815                print_ok_ref_status(ref, porcelain);
 816                break;
 817        }
 818
 819        return 1;
 820}
 821
 822static void print_push_status(const char *dest, struct ref *refs,
 823                              int verbose, int porcelain, int * nonfastforward)
 824{
 825        struct ref *ref;
 826        int n = 0;
 827
 828        if (verbose) {
 829                for (ref = refs; ref; ref = ref->next)
 830                        if (ref->status == REF_STATUS_UPTODATE)
 831                                n += print_one_push_status(ref, dest, n, porcelain);
 832        }
 833
 834        for (ref = refs; ref; ref = ref->next)
 835                if (ref->status == REF_STATUS_OK)
 836                        n += print_one_push_status(ref, dest, n, porcelain);
 837
 838        *nonfastforward = 0;
 839        for (ref = refs; ref; ref = ref->next) {
 840                if (ref->status != REF_STATUS_NONE &&
 841                    ref->status != REF_STATUS_UPTODATE &&
 842                    ref->status != REF_STATUS_OK)
 843                        n += print_one_push_status(ref, dest, n, porcelain);
 844                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 845                        *nonfastforward = 1;
 846        }
 847}
 848
 849static void verify_remote_names(int nr_heads, const char **heads)
 850{
 851        int i;
 852
 853        for (i = 0; i < nr_heads; i++) {
 854                const char *local = heads[i];
 855                const char *remote = strrchr(heads[i], ':');
 856
 857                if (*local == '+')
 858                        local++;
 859
 860                /* A matching refspec is okay.  */
 861                if (remote == local && remote[1] == '\0')
 862                        continue;
 863
 864                remote = remote ? (remote + 1) : local;
 865                switch (check_ref_format(remote)) {
 866                case 0: /* ok */
 867                case CHECK_REF_FORMAT_ONELEVEL:
 868                        /* ok but a single level -- that is fine for
 869                         * a match pattern.
 870                         */
 871                case CHECK_REF_FORMAT_WILDCARD:
 872                        /* ok but ends with a pattern-match character */
 873                        continue;
 874                }
 875                die("remote part of refspec is not a valid name in %s",
 876                    heads[i]);
 877        }
 878}
 879
 880static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 881{
 882        struct git_transport_data *data = transport->data;
 883        struct send_pack_args args;
 884        int ret;
 885
 886        if (!data->conn) {
 887                struct ref *tmp_refs;
 888                connect_setup(transport, 1, 0);
 889
 890                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 891                                 NULL);
 892        }
 893
 894        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 895        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 896        args.use_thin_pack = data->thin;
 897        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 898        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 899
 900        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 901                        &data->extra_have);
 902
 903        close(data->fd[1]);
 904        close(data->fd[0]);
 905        ret |= finish_connect(data->conn);
 906        data->conn = NULL;
 907
 908        return ret;
 909}
 910
 911static int disconnect_git(struct transport *transport)
 912{
 913        struct git_transport_data *data = transport->data;
 914        if (data->conn) {
 915                packet_flush(data->fd[1]);
 916                close(data->fd[0]);
 917                close(data->fd[1]);
 918                finish_connect(data->conn);
 919        }
 920
 921        free(data);
 922        return 0;
 923}
 924
 925static int is_local(const char *url)
 926{
 927        const char *colon = strchr(url, ':');
 928        const char *slash = strchr(url, '/');
 929        return !colon || (slash && slash < colon) ||
 930                has_dos_drive_prefix(url);
 931}
 932
 933static int is_file(const char *url)
 934{
 935        struct stat buf;
 936        if (stat(url, &buf))
 937                return 0;
 938        return S_ISREG(buf.st_mode);
 939}
 940
 941struct transport *transport_get(struct remote *remote, const char *url)
 942{
 943        struct transport *ret = xcalloc(1, sizeof(*ret));
 944
 945        ret->remote = remote;
 946        ret->url = url;
 947
 948        if (!prefixcmp(url, "rsync:")) {
 949                ret->get_refs_list = get_refs_via_rsync;
 950                ret->fetch = fetch_objs_via_rsync;
 951                ret->push = rsync_transport_push;
 952
 953        } else if (!prefixcmp(url, "http://")
 954                || !prefixcmp(url, "https://")
 955                || !prefixcmp(url, "ftp://")) {
 956#ifdef NO_CURL
 957                error("git was compiled without libcurl support.");
 958#else
 959                ret->get_refs_list = get_refs_via_curl;
 960                ret->fetch = fetch_objs_via_curl;
 961                ret->push = curl_transport_push;
 962#endif
 963                ret->disconnect = disconnect_walker;
 964
 965        } else if (is_local(url) && is_file(url)) {
 966                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 967                ret->data = data;
 968                ret->get_refs_list = get_refs_from_bundle;
 969                ret->fetch = fetch_refs_from_bundle;
 970                ret->disconnect = close_bundle;
 971
 972        } else {
 973                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 974                ret->data = data;
 975                ret->set_option = set_git_option;
 976                ret->get_refs_list = get_refs_via_connect;
 977                ret->fetch = fetch_refs_via_pack;
 978                ret->push_refs = git_transport_push;
 979                ret->disconnect = disconnect_git;
 980
 981                data->thin = 1;
 982                data->conn = NULL;
 983                data->uploadpack = "git-upload-pack";
 984                if (remote && remote->uploadpack)
 985                        data->uploadpack = remote->uploadpack;
 986                data->receivepack = "git-receive-pack";
 987                if (remote && remote->receivepack)
 988                        data->receivepack = remote->receivepack;
 989        }
 990
 991        return ret;
 992}
 993
 994int transport_set_option(struct transport *transport,
 995                         const char *name, const char *value)
 996{
 997        if (transport->set_option)
 998                return transport->set_option(transport, name, value);
 999        return 1;
1000}
1001
1002int transport_push(struct transport *transport,
1003                   int refspec_nr, const char **refspec, int flags,
1004                   int *nonfastforward)
1005{
1006        *nonfastforward = 0;
1007        verify_remote_names(refspec_nr, refspec);
1008
1009        if (transport->push)
1010                return transport->push(transport, refspec_nr, refspec, flags);
1011        if (transport->push_refs) {
1012                struct ref *remote_refs =
1013                        transport->get_refs_list(transport, 1);
1014                struct ref *local_refs = get_local_heads();
1015                int match_flags = MATCH_REFS_NONE;
1016                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1017                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1018                int ret;
1019
1020                if (flags & TRANSPORT_PUSH_ALL)
1021                        match_flags |= MATCH_REFS_ALL;
1022                if (flags & TRANSPORT_PUSH_MIRROR)
1023                        match_flags |= MATCH_REFS_MIRROR;
1024
1025                if (match_refs(local_refs, &remote_refs,
1026                               refspec_nr, refspec, match_flags)) {
1027                        return -1;
1028                }
1029
1030                ret = transport->push_refs(transport, remote_refs, flags);
1031
1032                print_push_status(transport->url, remote_refs, verbose | porcelain, porcelain, nonfastforward);
1033
1034                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1035                        struct ref *ref;
1036                        for (ref = remote_refs; ref; ref = ref->next)
1037                                update_tracking_ref(transport->remote, ref, verbose);
1038                }
1039
1040                if (!ret && !refs_pushed(remote_refs))
1041                        fprintf(stderr, "Everything up-to-date\n");
1042                return ret;
1043        }
1044        return 1;
1045}
1046
1047const struct ref *transport_get_remote_refs(struct transport *transport)
1048{
1049        if (!transport->remote_refs)
1050                transport->remote_refs = transport->get_refs_list(transport, 0);
1051        return transport->remote_refs;
1052}
1053
1054int transport_fetch_refs(struct transport *transport, const struct ref *refs)
1055{
1056        int rc;
1057        int nr_heads = 0, nr_alloc = 0;
1058        const struct ref **heads = NULL;
1059        const struct ref *rm;
1060
1061        for (rm = refs; rm; rm = rm->next) {
1062                if (rm->peer_ref &&
1063                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1064                        continue;
1065                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1066                heads[nr_heads++] = rm;
1067        }
1068
1069        rc = transport->fetch(transport, nr_heads, heads);
1070        free(heads);
1071        return rc;
1072}
1073
1074void transport_unlock_pack(struct transport *transport)
1075{
1076        if (transport->pack_lockfile) {
1077                unlink_or_warn(transport->pack_lockfile);
1078                free(transport->pack_lockfile);
1079                transport->pack_lockfile = NULL;
1080        }
1081}
1082
1083int transport_disconnect(struct transport *transport)
1084{
1085        int ret = 0;
1086        if (transport->disconnect)
1087                ret = transport->disconnect(transport);
1088        free(transport);
1089        return ret;
1090}
1091
1092/*
1093 * Strip username (and password) from an url and return
1094 * it in a newly allocated string.
1095 */
1096char *transport_anonymize_url(const char *url)
1097{
1098        char *anon_url, *scheme_prefix, *anon_part;
1099        size_t anon_len, prefix_len = 0;
1100
1101        anon_part = strchr(url, '@');
1102        if (is_local(url) || !anon_part)
1103                goto literal_copy;
1104
1105        anon_len = strlen(++anon_part);
1106        scheme_prefix = strstr(url, "://");
1107        if (!scheme_prefix) {
1108                if (!strchr(anon_part, ':'))
1109                        /* cannot be "me@there:/path/name" */
1110                        goto literal_copy;
1111        } else {
1112                const char *cp;
1113                /* make sure scheme is reasonable */
1114                for (cp = url; cp < scheme_prefix; cp++) {
1115                        switch (*cp) {
1116                                /* RFC 1738 2.1 */
1117                        case '+': case '.': case '-':
1118                                break; /* ok */
1119                        default:
1120                                if (isalnum(*cp))
1121                                        break;
1122                                /* it isn't */
1123                                goto literal_copy;
1124                        }
1125                }
1126                /* @ past the first slash does not count */
1127                cp = strchr(scheme_prefix + 3, '/');
1128                if (cp && cp < anon_part)
1129                        goto literal_copy;
1130                prefix_len = scheme_prefix - url + 3;
1131        }
1132        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1133        memcpy(anon_url, url, prefix_len);
1134        memcpy(anon_url + prefix_len, anon_part, anon_len);
1135        return anon_url;
1136literal_copy:
1137        return xstrdup(url);
1138}