Andrew's git - gitweb.git/blob

0885801a0674f44e96f509fb867fab467cc3aacb
   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        if (err < 0 && errno == ENOENT)
 421                error("unable to exec %s", argv[0]);
 422        return !!err;
 423}
 424
 425static struct ref *get_refs_via_curl(struct transport *transport, int for_push)
 426{
 427        struct strbuf buffer = STRBUF_INIT;
 428        char *data, *start, *mid;
 429        char *ref_name;
 430        char *refs_url;
 431        int i = 0;
 432        int http_ret;
 433
 434        struct ref *refs = NULL;
 435        struct ref *ref = NULL;
 436        struct ref *last_ref = NULL;
 437
 438        struct walker *walker;
 439
 440        if (for_push)
 441                return NULL;
 442
 443        if (!transport->data)
 444                transport->data = get_http_walker(transport->url,
 445                                                transport->remote);
 446
 447        walker = transport->data;
 448
 449        refs_url = xmalloc(strlen(transport->url) + 11);
 450        sprintf(refs_url, "%s/info/refs", transport->url);
 451
 452        http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
 453        switch (http_ret) {
 454        case HTTP_OK:
 455                break;
 456        case HTTP_MISSING_TARGET:
 457                die("%s not found: did you run git update-server-info on the"
 458                    " server?", refs_url);
 459        default:
 460                http_error(refs_url, http_ret);
 461                die("HTTP request failed");
 462        }
 463
 464        data = buffer.buf;
 465        start = NULL;
 466        mid = data;
 467        while (i < buffer.len) {
 468                if (!start)
 469                        start = &data[i];
 470                if (data[i] == '\t')
 471                        mid = &data[i];
 472                if (data[i] == '\n') {
 473                        data[i] = 0;
 474                        ref_name = mid + 1;
 475                        ref = xmalloc(sizeof(struct ref) +
 476                                      strlen(ref_name) + 1);
 477                        memset(ref, 0, sizeof(struct ref));
 478                        strcpy(ref->name, ref_name);
 479                        get_sha1_hex(start, ref->old_sha1);
 480                        if (!refs)
 481                                refs = ref;
 482                        if (last_ref)
 483                                last_ref->next = ref;
 484                        last_ref = ref;
 485                        start = NULL;
 486                }
 487                i++;
 488        }
 489
 490        strbuf_release(&buffer);
 491
 492        ref = alloc_ref("HEAD");
 493        if (!walker->fetch_ref(walker, ref) &&
 494            !resolve_remote_symref(ref, refs)) {
 495                ref->next = refs;
 496                refs = ref;
 497        } else {
 498                free(ref);
 499        }
 500
 501        strbuf_release(&buffer);
 502        free(refs_url);
 503        return refs;
 504}
 505
 506static int fetch_objs_via_curl(struct transport *transport,
 507                                 int nr_objs, const struct ref **to_fetch)
 508{
 509        if (!transport->data)
 510                transport->data = get_http_walker(transport->url,
 511                                                transport->remote);
 512        return fetch_objs_via_walker(transport, nr_objs, to_fetch);
 513}
 514
 515#endif
 516
 517struct bundle_transport_data {
 518        int fd;
 519        struct bundle_header header;
 520};
 521
 522static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 523{
 524        struct bundle_transport_data *data = transport->data;
 525        struct ref *result = NULL;
 526        int i;
 527
 528        if (for_push)
 529                return NULL;
 530
 531        if (data->fd > 0)
 532                close(data->fd);
 533        data->fd = read_bundle_header(transport->url, &data->header);
 534        if (data->fd < 0)
 535                die ("Could not read bundle '%s'.", transport->url);
 536        for (i = 0; i < data->header.references.nr; i++) {
 537                struct ref_list_entry *e = data->header.references.list + i;
 538                struct ref *ref = alloc_ref(e->name);
 539                hashcpy(ref->old_sha1, e->sha1);
 540                ref->next = result;
 541                result = ref;
 542        }
 543        return result;
 544}
 545
 546static int fetch_refs_from_bundle(struct transport *transport,
 547                               int nr_heads, const struct ref **to_fetch)
 548{
 549        struct bundle_transport_data *data = transport->data;
 550        return unbundle(&data->header, data->fd);
 551}
 552
 553static int close_bundle(struct transport *transport)
 554{
 555        struct bundle_transport_data *data = transport->data;
 556        if (data->fd > 0)
 557                close(data->fd);
 558        free(data);
 559        return 0;
 560}
 561
 562struct git_transport_data {
 563        unsigned thin : 1;
 564        unsigned keep : 1;
 565        unsigned followtags : 1;
 566        int depth;
 567        struct child_process *conn;
 568        int fd[2];
 569        const char *uploadpack;
 570        const char *receivepack;
 571        struct extra_have_objects extra_have;
 572};
 573
 574static int set_git_option(struct transport *connection,
 575                          const char *name, const char *value)
 576{
 577        struct git_transport_data *data = connection->data;
 578        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 579                data->uploadpack = value;
 580                return 0;
 581        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 582                data->receivepack = value;
 583                return 0;
 584        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 585                data->thin = !!value;
 586                return 0;
 587        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 588                data->followtags = !!value;
 589                return 0;
 590        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 591                data->keep = !!value;
 592                return 0;
 593        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 594                if (!value)
 595                        data->depth = 0;
 596                else
 597                        data->depth = atoi(value);
 598                return 0;
 599        }
 600        return 1;
 601}
 602
 603static int connect_setup(struct transport *transport, int for_push, int verbose)
 604{
 605        struct git_transport_data *data = transport->data;
 606        data->conn = git_connect(data->fd, transport->url,
 607                                 for_push ? data->receivepack : data->uploadpack,
 608                                 verbose ? CONNECT_VERBOSE : 0);
 609        return 0;
 610}
 611
 612static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 613{
 614        struct git_transport_data *data = transport->data;
 615        struct ref *refs;
 616
 617        connect_setup(transport, for_push, 0);
 618        get_remote_heads(data->fd[0], &refs, 0, NULL,
 619                         for_push ? REF_NORMAL : 0, &data->extra_have);
 620
 621        return refs;
 622}
 623
 624static int fetch_refs_via_pack(struct transport *transport,
 625                               int nr_heads, const struct ref **to_fetch)
 626{
 627        struct git_transport_data *data = transport->data;
 628        char **heads = xmalloc(nr_heads * sizeof(*heads));
 629        char **origh = xmalloc(nr_heads * sizeof(*origh));
 630        const struct ref *refs;
 631        char *dest = xstrdup(transport->url);
 632        struct fetch_pack_args args;
 633        int i;
 634        struct ref *refs_tmp = NULL;
 635
 636        memset(&args, 0, sizeof(args));
 637        args.uploadpack = data->uploadpack;
 638        args.keep_pack = data->keep;
 639        args.lock_pack = 1;
 640        args.use_thin_pack = data->thin;
 641        args.include_tag = data->followtags;
 642        args.verbose = (transport->verbose > 0);
 643        args.quiet = (transport->verbose < 0);
 644        args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 645        args.depth = data->depth;
 646
 647        for (i = 0; i < nr_heads; i++)
 648                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 649
 650        if (!data->conn) {
 651                connect_setup(transport, 0, 0);
 652                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 653        }
 654
 655        refs = fetch_pack(&args, data->fd, data->conn,
 656                          refs_tmp ? refs_tmp : transport->remote_refs,
 657                          dest, nr_heads, heads, &transport->pack_lockfile);
 658        close(data->fd[0]);
 659        close(data->fd[1]);
 660        if (finish_connect(data->conn))
 661                refs = NULL;
 662        data->conn = NULL;
 663
 664        free_refs(refs_tmp);
 665
 666        for (i = 0; i < nr_heads; i++)
 667                free(origh[i]);
 668        free(origh);
 669        free(heads);
 670        free(dest);
 671        return (refs ? 0 : -1);
 672}
 673
 674static int refs_pushed(struct ref *ref)
 675{
 676        for (; ref; ref = ref->next) {
 677                switch(ref->status) {
 678                case REF_STATUS_NONE:
 679                case REF_STATUS_UPTODATE:
 680                        break;
 681                default:
 682                        return 1;
 683                }
 684        }
 685        return 0;
 686}
 687
 688static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 689{
 690        struct refspec rs;
 691
 692        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 693                return;
 694
 695        rs.src = ref->name;
 696        rs.dst = NULL;
 697
 698        if (!remote_find_tracking(remote, &rs)) {
 699                if (verbose)
 700                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 701                if (ref->deletion) {
 702                        delete_ref(rs.dst, NULL, 0);
 703                } else
 704                        update_ref("update by push", rs.dst,
 705                                        ref->new_sha1, NULL, 0, 0);
 706                free(rs.dst);
 707        }
 708}
 709
 710#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 711
 712static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg)
 713{
 714        fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 715        if (from)
 716                fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 717        else
 718                fputs(prettify_refname(to->name), stderr);
 719        if (msg) {
 720                fputs(" (", stderr);
 721                fputs(msg, stderr);
 722                fputc(')', stderr);
 723        }
 724        fputc('\n', stderr);
 725}
 726
 727static const char *status_abbrev(unsigned char sha1[20])
 728{
 729        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 730}
 731
 732static void print_ok_ref_status(struct ref *ref)
 733{
 734        if (ref->deletion)
 735                print_ref_status('-', "[deleted]", ref, NULL, NULL);
 736        else if (is_null_sha1(ref->old_sha1))
 737                print_ref_status('*',
 738                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 739                          "[new branch]"),
 740                        ref, ref->peer_ref, NULL);
 741        else {
 742                char quickref[84];
 743                char type;
 744                const char *msg;
 745
 746                strcpy(quickref, status_abbrev(ref->old_sha1));
 747                if (ref->nonfastforward) {
 748                        strcat(quickref, "...");
 749                        type = '+';
 750                        msg = "forced update";
 751                } else {
 752                        strcat(quickref, "..");
 753                        type = ' ';
 754                        msg = NULL;
 755                }
 756                strcat(quickref, status_abbrev(ref->new_sha1));
 757
 758                print_ref_status(type, quickref, ref, ref->peer_ref, msg);
 759        }
 760}
 761
 762static int print_one_push_status(struct ref *ref, const char *dest, int count)
 763{
 764        if (!count)
 765                fprintf(stderr, "To %s\n", dest);
 766
 767        switch(ref->status) {
 768        case REF_STATUS_NONE:
 769                print_ref_status('X', "[no match]", ref, NULL, NULL);
 770                break;
 771        case REF_STATUS_REJECT_NODELETE:
 772                print_ref_status('!', "[rejected]", ref, NULL,
 773                                "remote does not support deleting refs");
 774                break;
 775        case REF_STATUS_UPTODATE:
 776                print_ref_status('=', "[up to date]", ref,
 777                                ref->peer_ref, NULL);
 778                break;
 779        case REF_STATUS_REJECT_NONFASTFORWARD:
 780                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 781                                "non-fast forward");
 782                break;
 783        case REF_STATUS_REMOTE_REJECT:
 784                print_ref_status('!', "[remote rejected]", ref,
 785                                ref->deletion ? NULL : ref->peer_ref,
 786                                ref->remote_status);
 787                break;
 788        case REF_STATUS_EXPECTING_REPORT:
 789                print_ref_status('!', "[remote failure]", ref,
 790                                ref->deletion ? NULL : ref->peer_ref,
 791                                "remote failed to report status");
 792                break;
 793        case REF_STATUS_OK:
 794                print_ok_ref_status(ref);
 795                break;
 796        }
 797
 798        return 1;
 799}
 800
 801static void print_push_status(const char *dest, struct ref *refs, int verbose)
 802{
 803        struct ref *ref;
 804        int n = 0;
 805
 806        if (verbose) {
 807                for (ref = refs; ref; ref = ref->next)
 808                        if (ref->status == REF_STATUS_UPTODATE)
 809                                n += print_one_push_status(ref, dest, n);
 810        }
 811
 812        for (ref = refs; ref; ref = ref->next)
 813                if (ref->status == REF_STATUS_OK)
 814                        n += print_one_push_status(ref, dest, n);
 815
 816        for (ref = refs; ref; ref = ref->next) {
 817                if (ref->status != REF_STATUS_NONE &&
 818                    ref->status != REF_STATUS_UPTODATE &&
 819                    ref->status != REF_STATUS_OK)
 820                        n += print_one_push_status(ref, dest, n);
 821        }
 822}
 823
 824static void verify_remote_names(int nr_heads, const char **heads)
 825{
 826        int i;
 827
 828        for (i = 0; i < nr_heads; i++) {
 829                const char *local = heads[i];
 830                const char *remote = strrchr(heads[i], ':');
 831
 832                if (*local == '+')
 833                        local++;
 834
 835                /* A matching refspec is okay.  */
 836                if (remote == local && remote[1] == '\0')
 837                        continue;
 838
 839                remote = remote ? (remote + 1) : local;
 840                switch (check_ref_format(remote)) {
 841                case 0: /* ok */
 842                case CHECK_REF_FORMAT_ONELEVEL:
 843                        /* ok but a single level -- that is fine for
 844                         * a match pattern.
 845                         */
 846                case CHECK_REF_FORMAT_WILDCARD:
 847                        /* ok but ends with a pattern-match character */
 848                        continue;
 849                }
 850                die("remote part of refspec is not a valid name in %s",
 851                    heads[i]);
 852        }
 853}
 854
 855static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 856{
 857        struct git_transport_data *data = transport->data;
 858        struct send_pack_args args;
 859        int ret;
 860
 861        if (!data->conn) {
 862                struct ref *tmp_refs;
 863                connect_setup(transport, 1, 0);
 864
 865                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 866                                 NULL);
 867        }
 868
 869        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 870        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 871        args.use_thin_pack = data->thin;
 872        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 873        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 874
 875        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 876                        &data->extra_have);
 877
 878        close(data->fd[1]);
 879        close(data->fd[0]);
 880        ret |= finish_connect(data->conn);
 881        data->conn = NULL;
 882
 883        return ret;
 884}
 885
 886static int disconnect_git(struct transport *transport)
 887{
 888        struct git_transport_data *data = transport->data;
 889        if (data->conn) {
 890                packet_flush(data->fd[1]);
 891                close(data->fd[0]);
 892                close(data->fd[1]);
 893                finish_connect(data->conn);
 894        }
 895
 896        free(data);
 897        return 0;
 898}
 899
 900static int is_local(const char *url)
 901{
 902        const char *colon = strchr(url, ':');
 903        const char *slash = strchr(url, '/');
 904        return !colon || (slash && slash < colon) ||
 905                has_dos_drive_prefix(url);
 906}
 907
 908static int is_file(const char *url)
 909{
 910        struct stat buf;
 911        if (stat(url, &buf))
 912                return 0;
 913        return S_ISREG(buf.st_mode);
 914}
 915
 916struct transport *transport_get(struct remote *remote, const char *url)
 917{
 918        struct transport *ret = xcalloc(1, sizeof(*ret));
 919
 920        ret->remote = remote;
 921        ret->url = url;
 922
 923        if (!prefixcmp(url, "rsync:")) {
 924                ret->get_refs_list = get_refs_via_rsync;
 925                ret->fetch = fetch_objs_via_rsync;
 926                ret->push = rsync_transport_push;
 927
 928        } else if (!prefixcmp(url, "http://")
 929                || !prefixcmp(url, "https://")
 930                || !prefixcmp(url, "ftp://")) {
 931#ifdef NO_CURL
 932                error("git was compiled without libcurl support.");
 933#else
 934                ret->get_refs_list = get_refs_via_curl;
 935                ret->fetch = fetch_objs_via_curl;
 936                ret->push = curl_transport_push;
 937#endif
 938                ret->disconnect = disconnect_walker;
 939
 940        } else if (is_local(url) && is_file(url)) {
 941                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 942                ret->data = data;
 943                ret->get_refs_list = get_refs_from_bundle;
 944                ret->fetch = fetch_refs_from_bundle;
 945                ret->disconnect = close_bundle;
 946
 947        } else {
 948                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 949                ret->data = data;
 950                ret->set_option = set_git_option;
 951                ret->get_refs_list = get_refs_via_connect;
 952                ret->fetch = fetch_refs_via_pack;
 953                ret->push_refs = git_transport_push;
 954                ret->disconnect = disconnect_git;
 955
 956                data->thin = 1;
 957                data->conn = NULL;
 958                data->uploadpack = "git-upload-pack";
 959                if (remote && remote->uploadpack)
 960                        data->uploadpack = remote->uploadpack;
 961                data->receivepack = "git-receive-pack";
 962                if (remote && remote->receivepack)
 963                        data->receivepack = remote->receivepack;
 964        }
 965
 966        return ret;
 967}
 968
 969int transport_set_option(struct transport *transport,
 970                         const char *name, const char *value)
 971{
 972        if (transport->set_option)
 973                return transport->set_option(transport, name, value);
 974        return 1;
 975}
 976
 977int transport_push(struct transport *transport,
 978                   int refspec_nr, const char **refspec, int flags)
 979{
 980        verify_remote_names(refspec_nr, refspec);
 981
 982        if (transport->push)
 983                return transport->push(transport, refspec_nr, refspec, flags);
 984        if (transport->push_refs) {
 985                struct ref *remote_refs =
 986                        transport->get_refs_list(transport, 1);
 987                struct ref *local_refs = get_local_heads();
 988                int match_flags = MATCH_REFS_NONE;
 989                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
 990                int ret;
 991
 992                if (flags & TRANSPORT_PUSH_ALL)
 993                        match_flags |= MATCH_REFS_ALL;
 994                if (flags & TRANSPORT_PUSH_MIRROR)
 995                        match_flags |= MATCH_REFS_MIRROR;
 996
 997                if (match_refs(local_refs, &remote_refs,
 998                               refspec_nr, refspec, match_flags)) {
 999                        return -1;
1000                }
1001
1002                ret = transport->push_refs(transport, remote_refs, flags);
1003
1004                print_push_status(transport->url, remote_refs, verbose);
1005
1006                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1007                        struct ref *ref;
1008                        for (ref = remote_refs; ref; ref = ref->next)
1009                                update_tracking_ref(transport->remote, ref, verbose);
1010                }
1011
1012                if (!ret && !refs_pushed(remote_refs))
1013                        fprintf(stderr, "Everything up-to-date\n");
1014                return ret;
1015        }
1016        return 1;
1017}
1018
1019const struct ref *transport_get_remote_refs(struct transport *transport)
1020{
1021        if (!transport->remote_refs)
1022                transport->remote_refs = transport->get_refs_list(transport, 0);
1023        return transport->remote_refs;
1024}
1025
1026int transport_fetch_refs(struct transport *transport, const struct ref *refs)
1027{
1028        int rc;
1029        int nr_heads = 0, nr_alloc = 0;
1030        const struct ref **heads = NULL;
1031        const struct ref *rm;
1032
1033        for (rm = refs; rm; rm = rm->next) {
1034                if (rm->peer_ref &&
1035                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1036                        continue;
1037                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1038                heads[nr_heads++] = rm;
1039        }
1040
1041        rc = transport->fetch(transport, nr_heads, heads);
1042        free(heads);
1043        return rc;
1044}
1045
1046void transport_unlock_pack(struct transport *transport)
1047{
1048        if (transport->pack_lockfile) {
1049                unlink_or_warn(transport->pack_lockfile);
1050                free(transport->pack_lockfile);
1051                transport->pack_lockfile = NULL;
1052        }
1053}
1054
1055int transport_disconnect(struct transport *transport)
1056{
1057        int ret = 0;
1058        if (transport->disconnect)
1059                ret = transport->disconnect(transport);
1060        free(transport);
1061        return ret;
1062}
1063
1064/*
1065 * Strip username (and password) from an url and return
1066 * it in a newly allocated string.
1067 */
1068char *transport_anonymize_url(const char *url)
1069{
1070        char *anon_url, *scheme_prefix, *anon_part;
1071        size_t anon_len, prefix_len = 0;
1072
1073        anon_part = strchr(url, '@');
1074        if (is_local(url) || !anon_part)
1075                goto literal_copy;
1076
1077        anon_len = strlen(++anon_part);
1078        scheme_prefix = strstr(url, "://");
1079        if (!scheme_prefix) {
1080                if (!strchr(anon_part, ':'))
1081                        /* cannot be "me@there:/path/name" */
1082                        goto literal_copy;
1083        } else {
1084                const char *cp;
1085                /* make sure scheme is reasonable */
1086                for (cp = url; cp < scheme_prefix; cp++) {
1087                        switch (*cp) {
1088                                /* RFC 1738 2.1 */
1089                        case '+': case '.': case '-':
1090                                break; /* ok */
1091                        default:
1092                                if (isalnum(*cp))
1093                                        break;
1094                                /* it isn't */
1095                                goto literal_copy;
1096                        }
1097                }
1098                /* @ past the first slash does not count */
1099                cp = strchr(scheme_prefix + 3, '/');
1100                if (cp && cp < anon_part)
1101                        goto literal_copy;
1102                prefix_len = scheme_prefix - url + 3;
1103        }
1104        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1105        memcpy(anon_url, url, prefix_len);
1106        memcpy(anon_url + prefix_len, anon_part, anon_len);
1107        return anon_url;
1108literal_copy:
1109        return xstrdup(url);
1110}