Andrew's git - gitweb.git/blob

b7c1c391c6d2c93fc07e97d9e3ea1415831504a7
   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 ("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 ("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
 443        struct active_request_slot *slot;
 444        struct slot_results results;
 445
 446        struct ref *refs = NULL;
 447        struct ref *ref = NULL;
 448        struct ref *last_ref = NULL;
 449
 450        struct walker *walker;
 451
 452        if (for_push)
 453                return NULL;
 454
 455        if (!transport->data)
 456                transport->data = get_http_walker(transport->url,
 457                                                transport->remote);
 458
 459        walker = transport->data;
 460
 461        refs_url = xmalloc(strlen(transport->url) + 11);
 462        sprintf(refs_url, "%s/info/refs", transport->url);
 463
 464        slot = get_active_slot();
 465        slot->results = &results;
 466        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
 467        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 468        curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
 469        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
 470
 471        if (start_active_slot(slot)) {
 472                run_active_slot(slot);
 473                if (results.curl_result != CURLE_OK) {
 474                        strbuf_release(&buffer);
 475                        if (missing_target(&results))
 476                                die("%s not found: did you run git update-server-info on the server?", refs_url);
 477                        else
 478                                die("%s download error - %s", refs_url, curl_errorstr);
 479                }
 480        } else {
 481                strbuf_release(&buffer);
 482                die("Unable to start HTTP request");
 483        }
 484
 485        data = buffer.buf;
 486        start = NULL;
 487        mid = data;
 488        while (i < buffer.len) {
 489                if (!start)
 490                        start = &data[i];
 491                if (data[i] == '\t')
 492                        mid = &data[i];
 493                if (data[i] == '\n') {
 494                        data[i] = 0;
 495                        ref_name = mid + 1;
 496                        ref = xmalloc(sizeof(struct ref) +
 497                                      strlen(ref_name) + 1);
 498                        memset(ref, 0, sizeof(struct ref));
 499                        strcpy(ref->name, ref_name);
 500                        get_sha1_hex(start, ref->old_sha1);
 501                        if (!refs)
 502                                refs = ref;
 503                        if (last_ref)
 504                                last_ref->next = ref;
 505                        last_ref = ref;
 506                        start = NULL;
 507                }
 508                i++;
 509        }
 510
 511        strbuf_release(&buffer);
 512
 513        ref = alloc_ref("HEAD");
 514        if (!walker->fetch_ref(walker, ref) &&
 515            !resolve_remote_symref(ref, refs)) {
 516                ref->next = refs;
 517                refs = ref;
 518        } else {
 519                free(ref);
 520        }
 521
 522        free(refs_url);
 523        return refs;
 524}
 525
 526static int fetch_objs_via_curl(struct transport *transport,
 527                                 int nr_objs, const struct ref **to_fetch)
 528{
 529        if (!transport->data)
 530                transport->data = get_http_walker(transport->url,
 531                                                transport->remote);
 532        return fetch_objs_via_walker(transport, nr_objs, to_fetch);
 533}
 534
 535#endif
 536
 537struct bundle_transport_data {
 538        int fd;
 539        struct bundle_header header;
 540};
 541
 542static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 543{
 544        struct bundle_transport_data *data = transport->data;
 545        struct ref *result = NULL;
 546        int i;
 547
 548        if (for_push)
 549                return NULL;
 550
 551        if (data->fd > 0)
 552                close(data->fd);
 553        data->fd = read_bundle_header(transport->url, &data->header);
 554        if (data->fd < 0)
 555                die ("Could not read bundle '%s'.", transport->url);
 556        for (i = 0; i < data->header.references.nr; i++) {
 557                struct ref_list_entry *e = data->header.references.list + i;
 558                struct ref *ref = alloc_ref(e->name);
 559                hashcpy(ref->old_sha1, e->sha1);
 560                ref->next = result;
 561                result = ref;
 562        }
 563        return result;
 564}
 565
 566static int fetch_refs_from_bundle(struct transport *transport,
 567                               int nr_heads, const struct ref **to_fetch)
 568{
 569        struct bundle_transport_data *data = transport->data;
 570        return unbundle(&data->header, data->fd);
 571}
 572
 573static int close_bundle(struct transport *transport)
 574{
 575        struct bundle_transport_data *data = transport->data;
 576        if (data->fd > 0)
 577                close(data->fd);
 578        free(data);
 579        return 0;
 580}
 581
 582struct git_transport_data {
 583        unsigned thin : 1;
 584        unsigned keep : 1;
 585        unsigned followtags : 1;
 586        int depth;
 587        struct child_process *conn;
 588        int fd[2];
 589        const char *uploadpack;
 590        const char *receivepack;
 591        struct extra_have_objects extra_have;
 592};
 593
 594static int set_git_option(struct transport *connection,
 595                          const char *name, const char *value)
 596{
 597        struct git_transport_data *data = connection->data;
 598        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 599                data->uploadpack = value;
 600                return 0;
 601        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 602                data->receivepack = value;
 603                return 0;
 604        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 605                data->thin = !!value;
 606                return 0;
 607        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 608                data->followtags = !!value;
 609                return 0;
 610        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 611                data->keep = !!value;
 612                return 0;
 613        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 614                if (!value)
 615                        data->depth = 0;
 616                else
 617                        data->depth = atoi(value);
 618                return 0;
 619        }
 620        return 1;
 621}
 622
 623static int connect_setup(struct transport *transport, int for_push, int verbose)
 624{
 625        struct git_transport_data *data = transport->data;
 626        data->conn = git_connect(data->fd, transport->url,
 627                                 for_push ? data->receivepack : data->uploadpack,
 628                                 verbose ? CONNECT_VERBOSE : 0);
 629        return 0;
 630}
 631
 632static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 633{
 634        struct git_transport_data *data = transport->data;
 635        struct ref *refs;
 636
 637        connect_setup(transport, for_push, 0);
 638        get_remote_heads(data->fd[0], &refs, 0, NULL,
 639                         for_push ? REF_NORMAL : 0, &data->extra_have);
 640
 641        return refs;
 642}
 643
 644static int fetch_refs_via_pack(struct transport *transport,
 645                               int nr_heads, const struct ref **to_fetch)
 646{
 647        struct git_transport_data *data = transport->data;
 648        char **heads = xmalloc(nr_heads * sizeof(*heads));
 649        char **origh = xmalloc(nr_heads * sizeof(*origh));
 650        const struct ref *refs;
 651        char *dest = xstrdup(transport->url);
 652        struct fetch_pack_args args;
 653        int i;
 654        struct ref *refs_tmp = NULL;
 655
 656        memset(&args, 0, sizeof(args));
 657        args.uploadpack = data->uploadpack;
 658        args.keep_pack = data->keep;
 659        args.lock_pack = 1;
 660        args.use_thin_pack = data->thin;
 661        args.include_tag = data->followtags;
 662        args.verbose = (transport->verbose > 0);
 663        args.quiet = (transport->verbose < 0);
 664        args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 665        args.depth = data->depth;
 666
 667        for (i = 0; i < nr_heads; i++)
 668                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 669
 670        if (!data->conn) {
 671                connect_setup(transport, 0, 0);
 672                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 673        }
 674
 675        refs = fetch_pack(&args, data->fd, data->conn,
 676                          refs_tmp ? refs_tmp : transport->remote_refs,
 677                          dest, nr_heads, heads, &transport->pack_lockfile);
 678        close(data->fd[0]);
 679        close(data->fd[1]);
 680        if (finish_connect(data->conn))
 681                refs = NULL;
 682        data->conn = NULL;
 683
 684        free_refs(refs_tmp);
 685
 686        for (i = 0; i < nr_heads; i++)
 687                free(origh[i]);
 688        free(origh);
 689        free(heads);
 690        free(dest);
 691        return (refs ? 0 : -1);
 692}
 693
 694static int refs_pushed(struct ref *ref)
 695{
 696        for (; ref; ref = ref->next) {
 697                switch(ref->status) {
 698                case REF_STATUS_NONE:
 699                case REF_STATUS_UPTODATE:
 700                        break;
 701                default:
 702                        return 1;
 703                }
 704        }
 705        return 0;
 706}
 707
 708static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 709{
 710        struct refspec rs;
 711
 712        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 713                return;
 714
 715        rs.src = ref->name;
 716        rs.dst = NULL;
 717
 718        if (!remote_find_tracking(remote, &rs)) {
 719                if (verbose)
 720                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 721                if (ref->deletion) {
 722                        delete_ref(rs.dst, NULL, 0);
 723                } else
 724                        update_ref("update by push", rs.dst,
 725                                        ref->new_sha1, NULL, 0, 0);
 726                free(rs.dst);
 727        }
 728}
 729
 730#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 731
 732static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg)
 733{
 734        fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 735        if (from)
 736                fprintf(stderr, "%s -> %s", prettify_ref(from), prettify_ref(to));
 737        else
 738                fputs(prettify_ref(to), stderr);
 739        if (msg) {
 740                fputs(" (", stderr);
 741                fputs(msg, stderr);
 742                fputc(')', stderr);
 743        }
 744        fputc('\n', stderr);
 745}
 746
 747static const char *status_abbrev(unsigned char sha1[20])
 748{
 749        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 750}
 751
 752static void print_ok_ref_status(struct ref *ref)
 753{
 754        if (ref->deletion)
 755                print_ref_status('-', "[deleted]", ref, NULL, NULL);
 756        else if (is_null_sha1(ref->old_sha1))
 757                print_ref_status('*',
 758                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 759                          "[new branch]"),
 760                        ref, ref->peer_ref, NULL);
 761        else {
 762                char quickref[84];
 763                char type;
 764                const char *msg;
 765
 766                strcpy(quickref, status_abbrev(ref->old_sha1));
 767                if (ref->nonfastforward) {
 768                        strcat(quickref, "...");
 769                        type = '+';
 770                        msg = "forced update";
 771                } else {
 772                        strcat(quickref, "..");
 773                        type = ' ';
 774                        msg = NULL;
 775                }
 776                strcat(quickref, status_abbrev(ref->new_sha1));
 777
 778                print_ref_status(type, quickref, ref, ref->peer_ref, msg);
 779        }
 780}
 781
 782static int print_one_push_status(struct ref *ref, const char *dest, int count)
 783{
 784        if (!count)
 785                fprintf(stderr, "To %s\n", dest);
 786
 787        switch(ref->status) {
 788        case REF_STATUS_NONE:
 789                print_ref_status('X', "[no match]", ref, NULL, NULL);
 790                break;
 791        case REF_STATUS_REJECT_NODELETE:
 792                print_ref_status('!', "[rejected]", ref, NULL,
 793                                "remote does not support deleting refs");
 794                break;
 795        case REF_STATUS_UPTODATE:
 796                print_ref_status('=', "[up to date]", ref,
 797                                ref->peer_ref, NULL);
 798                break;
 799        case REF_STATUS_REJECT_NONFASTFORWARD:
 800                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 801                                "non-fast forward");
 802                break;
 803        case REF_STATUS_REMOTE_REJECT:
 804                print_ref_status('!', "[remote rejected]", ref,
 805                                ref->deletion ? NULL : ref->peer_ref,
 806                                ref->remote_status);
 807                break;
 808        case REF_STATUS_EXPECTING_REPORT:
 809                print_ref_status('!', "[remote failure]", ref,
 810                                ref->deletion ? NULL : ref->peer_ref,
 811                                "remote failed to report status");
 812                break;
 813        case REF_STATUS_OK:
 814                print_ok_ref_status(ref);
 815                break;
 816        }
 817
 818        return 1;
 819}
 820
 821static void print_push_status(const char *dest, struct ref *refs, int verbose)
 822{
 823        struct ref *ref;
 824        int n = 0;
 825
 826        if (verbose) {
 827                for (ref = refs; ref; ref = ref->next)
 828                        if (ref->status == REF_STATUS_UPTODATE)
 829                                n += print_one_push_status(ref, dest, n);
 830        }
 831
 832        for (ref = refs; ref; ref = ref->next)
 833                if (ref->status == REF_STATUS_OK)
 834                        n += print_one_push_status(ref, dest, n);
 835
 836        for (ref = refs; ref; ref = ref->next) {
 837                if (ref->status != REF_STATUS_NONE &&
 838                    ref->status != REF_STATUS_UPTODATE &&
 839                    ref->status != REF_STATUS_OK)
 840                        n += print_one_push_status(ref, dest, n);
 841        }
 842}
 843
 844static void verify_remote_names(int nr_heads, const char **heads)
 845{
 846        int i;
 847
 848        for (i = 0; i < nr_heads; i++) {
 849                const char *local = heads[i];
 850                const char *remote = strrchr(heads[i], ':');
 851
 852                if (*local == '+')
 853                        local++;
 854
 855                /* A matching refspec is okay.  */
 856                if (remote == local && remote[1] == '\0')
 857                        continue;
 858
 859                remote = remote ? (remote + 1) : local;
 860                switch (check_ref_format(remote)) {
 861                case 0: /* ok */
 862                case CHECK_REF_FORMAT_ONELEVEL:
 863                        /* ok but a single level -- that is fine for
 864                         * a match pattern.
 865                         */
 866                case CHECK_REF_FORMAT_WILDCARD:
 867                        /* ok but ends with a pattern-match character */
 868                        continue;
 869                }
 870                die("remote part of refspec is not a valid name in %s",
 871                    heads[i]);
 872        }
 873}
 874
 875static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 876{
 877        struct git_transport_data *data = transport->data;
 878        struct send_pack_args args;
 879        int ret;
 880
 881        if (!data->conn) {
 882                struct ref *tmp_refs;
 883                connect_setup(transport, 1, 0);
 884
 885                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 886                                 NULL);
 887        }
 888
 889        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 890        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 891        args.use_thin_pack = data->thin;
 892        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 893        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 894
 895        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 896                        &data->extra_have);
 897
 898        close(data->fd[1]);
 899        close(data->fd[0]);
 900        ret |= finish_connect(data->conn);
 901        data->conn = NULL;
 902
 903        return ret;
 904}
 905
 906static int disconnect_git(struct transport *transport)
 907{
 908        struct git_transport_data *data = transport->data;
 909        if (data->conn) {
 910                packet_flush(data->fd[1]);
 911                close(data->fd[0]);
 912                close(data->fd[1]);
 913                finish_connect(data->conn);
 914        }
 915
 916        free(data);
 917        return 0;
 918}
 919
 920static int is_local(const char *url)
 921{
 922        const char *colon = strchr(url, ':');
 923        const char *slash = strchr(url, '/');
 924        return !colon || (slash && slash < colon) ||
 925                has_dos_drive_prefix(url);
 926}
 927
 928static int is_file(const char *url)
 929{
 930        struct stat buf;
 931        if (stat(url, &buf))
 932                return 0;
 933        return S_ISREG(buf.st_mode);
 934}
 935
 936struct transport *transport_get(struct remote *remote, const char *url)
 937{
 938        struct transport *ret = xcalloc(1, sizeof(*ret));
 939
 940        ret->remote = remote;
 941        ret->url = url;
 942
 943        if (!prefixcmp(url, "rsync:")) {
 944                ret->get_refs_list = get_refs_via_rsync;
 945                ret->fetch = fetch_objs_via_rsync;
 946                ret->push = rsync_transport_push;
 947
 948        } else if (!prefixcmp(url, "http://")
 949                || !prefixcmp(url, "https://")
 950                || !prefixcmp(url, "ftp://")) {
 951#ifdef NO_CURL
 952                error("git was compiled without libcurl support.");
 953#else
 954                ret->get_refs_list = get_refs_via_curl;
 955                ret->fetch = fetch_objs_via_curl;
 956                ret->push = curl_transport_push;
 957#endif
 958                ret->disconnect = disconnect_walker;
 959
 960        } else if (is_local(url) && is_file(url)) {
 961                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 962                ret->data = data;
 963                ret->get_refs_list = get_refs_from_bundle;
 964                ret->fetch = fetch_refs_from_bundle;
 965                ret->disconnect = close_bundle;
 966
 967        } else {
 968                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 969                ret->data = data;
 970                ret->set_option = set_git_option;
 971                ret->get_refs_list = get_refs_via_connect;
 972                ret->fetch = fetch_refs_via_pack;
 973                ret->push_refs = git_transport_push;
 974                ret->disconnect = disconnect_git;
 975
 976                data->thin = 1;
 977                data->conn = NULL;
 978                data->uploadpack = "git-upload-pack";
 979                if (remote && remote->uploadpack)
 980                        data->uploadpack = remote->uploadpack;
 981                data->receivepack = "git-receive-pack";
 982                if (remote && remote->receivepack)
 983                        data->receivepack = remote->receivepack;
 984        }
 985
 986        return ret;
 987}
 988
 989int transport_set_option(struct transport *transport,
 990                         const char *name, const char *value)
 991{
 992        if (transport->set_option)
 993                return transport->set_option(transport, name, value);
 994        return 1;
 995}
 996
 997int transport_push(struct transport *transport,
 998                   int refspec_nr, const char **refspec, int flags)
 999{
1000        verify_remote_names(refspec_nr, refspec);
1001
1002        if (transport->push)
1003                return transport->push(transport, refspec_nr, refspec, flags);
1004        if (transport->push_refs) {
1005                struct ref *remote_refs =
1006                        transport->get_refs_list(transport, 1);
1007                struct ref **remote_tail;
1008                struct ref *local_refs = get_local_heads();
1009                int match_flags = MATCH_REFS_NONE;
1010                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1011                int ret;
1012
1013                if (flags & TRANSPORT_PUSH_ALL)
1014                        match_flags |= MATCH_REFS_ALL;
1015                if (flags & TRANSPORT_PUSH_MIRROR)
1016                        match_flags |= MATCH_REFS_MIRROR;
1017
1018                remote_tail = &remote_refs;
1019                while (*remote_tail)
1020                        remote_tail = &((*remote_tail)->next);
1021                if (match_refs(local_refs, remote_refs, &remote_tail,
1022                               refspec_nr, refspec, match_flags)) {
1023                        return -1;
1024                }
1025
1026                ret = transport->push_refs(transport, remote_refs, flags);
1027
1028                print_push_status(transport->url, remote_refs, verbose);
1029
1030                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1031                        struct ref *ref;
1032                        for (ref = remote_refs; ref; ref = ref->next)
1033                                update_tracking_ref(transport->remote, ref, verbose);
1034                }
1035
1036                if (!ret && !refs_pushed(remote_refs))
1037                        fprintf(stderr, "Everything up-to-date\n");
1038                return ret;
1039        }
1040        return 1;
1041}
1042
1043const struct ref *transport_get_remote_refs(struct transport *transport)
1044{
1045        if (!transport->remote_refs)
1046                transport->remote_refs = transport->get_refs_list(transport, 0);
1047        return transport->remote_refs;
1048}
1049
1050int transport_fetch_refs(struct transport *transport, const struct ref *refs)
1051{
1052        int rc;
1053        int nr_heads = 0, nr_alloc = 0;
1054        const struct ref **heads = NULL;
1055        const struct ref *rm;
1056
1057        for (rm = refs; rm; rm = rm->next) {
1058                if (rm->peer_ref &&
1059                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1060                        continue;
1061                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1062                heads[nr_heads++] = rm;
1063        }
1064
1065        rc = transport->fetch(transport, nr_heads, heads);
1066        free(heads);
1067        return rc;
1068}
1069
1070void transport_unlock_pack(struct transport *transport)
1071{
1072        if (transport->pack_lockfile) {
1073                unlink_or_warn(transport->pack_lockfile);
1074                free(transport->pack_lockfile);
1075                transport->pack_lockfile = NULL;
1076        }
1077}
1078
1079int transport_disconnect(struct transport *transport)
1080{
1081        int ret = 0;
1082        if (transport->disconnect)
1083                ret = transport->disconnect(transport);
1084        free(transport);
1085        return ret;
1086}
1087
1088/*
1089 * Strip username (and password) from an url and return
1090 * it in a newly allocated string.
1091 */
1092char *transport_anonymize_url(const char *url)
1093{
1094        char *anon_url, *scheme_prefix, *anon_part;
1095        size_t anon_len, prefix_len = 0;
1096
1097        anon_part = strchr(url, '@');
1098        if (is_local(url) || !anon_part)
1099                goto literal_copy;
1100
1101        anon_len = strlen(++anon_part);
1102        scheme_prefix = strstr(url, "://");
1103        if (!scheme_prefix) {
1104                if (!strchr(anon_part, ':'))
1105                        /* cannot be "me@there:/path/name" */
1106                        goto literal_copy;
1107        } else {
1108                const char *cp;
1109                /* make sure scheme is reasonable */
1110                for (cp = url; cp < scheme_prefix; cp++) {
1111                        switch (*cp) {
1112                                /* RFC 1738 2.1 */
1113                        case '+': case '.': case '-':
1114                                break; /* ok */
1115                        default:
1116                                if (isalnum(*cp))
1117                                        break;
1118                                /* it isn't */
1119                                goto literal_copy;
1120                        }
1121                }
1122                /* @ past the first slash does not count */
1123                cp = strchr(scheme_prefix + 3, '/');
1124                if (cp && cp < anon_part)
1125                        goto literal_copy;
1126                prefix_len = scheme_prefix - url + 3;
1127        }
1128        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1129        memcpy(anon_url, url, prefix_len);
1130        memcpy(anon_url + prefix_len, anon_part, anon_len);
1131        return anon_url;
1132literal_copy:
1133        return xstrdup(url);
1134}