Andrew's git / gitweb.git / transport.c
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transport.con commit Merge branch 'ld/p4' (b5a8dc7)
   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
 400        if (flags & TRANSPORT_PUSH_MIRROR)
 401                return error("http transport does not support mirror mode");
 402
 403        argv = xmalloc((refspec_nr + 12) * sizeof(char *));
 404        argv[0] = "http-push";
 405        argc = 1;
 406        if (flags & TRANSPORT_PUSH_ALL)
 407                argv[argc++] = "--all";
 408        if (flags & TRANSPORT_PUSH_FORCE)
 409                argv[argc++] = "--force";
 410        if (flags & TRANSPORT_PUSH_DRY_RUN)
 411                argv[argc++] = "--dry-run";
 412        if (flags & TRANSPORT_PUSH_VERBOSE)
 413                argv[argc++] = "--verbose";
 414        argv[argc++] = transport->url;
 415        while (refspec_nr--)
 416                argv[argc++] = *refspec++;
 417        argv[argc] = NULL;
 418        return !!run_command_v_opt(argv, RUN_GIT_CMD);
 419}
 420
 421static struct ref *get_refs_via_curl(struct transport *transport, int for_push)
 422{
 423        struct strbuf buffer = STRBUF_INIT;
 424        char *data, *start, *mid;
 425        char *ref_name;
 426        char *refs_url;
 427        int i = 0;
 428        int http_ret;
 429
 430        struct ref *refs = NULL;
 431        struct ref *ref = NULL;
 432        struct ref *last_ref = NULL;
 433
 434        struct walker *walker;
 435
 436        if (for_push)
 437                return NULL;
 438
 439        if (!transport->data)
 440                transport->data = get_http_walker(transport->url,
 441                                                transport->remote);
 442
 443        walker = transport->data;
 444
 445        refs_url = xmalloc(strlen(transport->url) + 11);
 446        sprintf(refs_url, "%s/info/refs", transport->url);
 447
 448        http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
 449        switch (http_ret) {
 450        case HTTP_OK:
 451                break;
 452        case HTTP_MISSING_TARGET:
 453                die("%s not found: did you run git update-server-info on the"
 454                    " server?", refs_url);
 455        default:
 456                http_error(refs_url, http_ret);
 457                die("HTTP request failed");
 458        }
 459
 460        data = buffer.buf;
 461        start = NULL;
 462        mid = data;
 463        while (i < buffer.len) {
 464                if (!start)
 465                        start = &data[i];
 466                if (data[i] == '\t')
 467                        mid = &data[i];
 468                if (data[i] == '\n') {
 469                        data[i] = 0;
 470                        ref_name = mid + 1;
 471                        ref = xmalloc(sizeof(struct ref) +
 472                                      strlen(ref_name) + 1);
 473                        memset(ref, 0, sizeof(struct ref));
 474                        strcpy(ref->name, ref_name);
 475                        get_sha1_hex(start, ref->old_sha1);
 476                        if (!refs)
 477                                refs = ref;
 478                        if (last_ref)
 479                                last_ref->next = ref;
 480                        last_ref = ref;
 481                        start = NULL;
 482                }
 483                i++;
 484        }
 485
 486        strbuf_release(&buffer);
 487
 488        ref = alloc_ref("HEAD");
 489        if (!walker->fetch_ref(walker, ref) &&
 490            !resolve_remote_symref(ref, refs)) {
 491                ref->next = refs;
 492                refs = ref;
 493        } else {
 494                free(ref);
 495        }
 496
 497        strbuf_release(&buffer);
 498        free(refs_url);
 499        return refs;
 500}
 501
 502static int fetch_objs_via_curl(struct transport *transport,
 503                                 int nr_objs, const struct ref **to_fetch)
 504{
 505        if (!transport->data)
 506                transport->data = get_http_walker(transport->url,
 507                                                transport->remote);
 508        return fetch_objs_via_walker(transport, nr_objs, to_fetch);
 509}
 510
 511#endif
 512
 513struct bundle_transport_data {
 514        int fd;
 515        struct bundle_header header;
 516};
 517
 518static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 519{
 520        struct bundle_transport_data *data = transport->data;
 521        struct ref *result = NULL;
 522        int i;
 523
 524        if (for_push)
 525                return NULL;
 526
 527        if (data->fd > 0)
 528                close(data->fd);
 529        data->fd = read_bundle_header(transport->url, &data->header);
 530        if (data->fd < 0)
 531                die ("Could not read bundle '%s'.", transport->url);
 532        for (i = 0; i < data->header.references.nr; i++) {
 533                struct ref_list_entry *e = data->header.references.list + i;
 534                struct ref *ref = alloc_ref(e->name);
 535                hashcpy(ref->old_sha1, e->sha1);
 536                ref->next = result;
 537                result = ref;
 538        }
 539        return result;
 540}
 541
 542static int fetch_refs_from_bundle(struct transport *transport,
 543                               int nr_heads, const struct ref **to_fetch)
 544{
 545        struct bundle_transport_data *data = transport->data;
 546        return unbundle(&data->header, data->fd);
 547}
 548
 549static int close_bundle(struct transport *transport)
 550{
 551        struct bundle_transport_data *data = transport->data;
 552        if (data->fd > 0)
 553                close(data->fd);
 554        free(data);
 555        return 0;
 556}
 557
 558struct git_transport_data {
 559        unsigned thin : 1;
 560        unsigned keep : 1;
 561        unsigned followtags : 1;
 562        int depth;
 563        struct child_process *conn;
 564        int fd[2];
 565        const char *uploadpack;
 566        const char *receivepack;
 567        struct extra_have_objects extra_have;
 568};
 569
 570static int set_git_option(struct transport *connection,
 571                          const char *name, const char *value)
 572{
 573        struct git_transport_data *data = connection->data;
 574        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 575                data->uploadpack = value;
 576                return 0;
 577        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 578                data->receivepack = value;
 579                return 0;
 580        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 581                data->thin = !!value;
 582                return 0;
 583        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 584                data->followtags = !!value;
 585                return 0;
 586        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 587                data->keep = !!value;
 588                return 0;
 589        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 590                if (!value)
 591                        data->depth = 0;
 592                else
 593                        data->depth = atoi(value);
 594                return 0;
 595        }
 596        return 1;
 597}
 598
 599static int connect_setup(struct transport *transport, int for_push, int verbose)
 600{
 601        struct git_transport_data *data = transport->data;
 602        data->conn = git_connect(data->fd, transport->url,
 603                                 for_push ? data->receivepack : data->uploadpack,
 604                                 verbose ? CONNECT_VERBOSE : 0);
 605        return 0;
 606}
 607
 608static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 609{
 610        struct git_transport_data *data = transport->data;
 611        struct ref *refs;
 612
 613        connect_setup(transport, for_push, 0);
 614        get_remote_heads(data->fd[0], &refs, 0, NULL,
 615                         for_push ? REF_NORMAL : 0, &data->extra_have);
 616
 617        return refs;
 618}
 619
 620static int fetch_refs_via_pack(struct transport *transport,
 621                               int nr_heads, const struct ref **to_fetch)
 622{
 623        struct git_transport_data *data = transport->data;
 624        char **heads = xmalloc(nr_heads * sizeof(*heads));
 625        char **origh = xmalloc(nr_heads * sizeof(*origh));
 626        const struct ref *refs;
 627        char *dest = xstrdup(transport->url);
 628        struct fetch_pack_args args;
 629        int i;
 630        struct ref *refs_tmp = NULL;
 631
 632        memset(&args, 0, sizeof(args));
 633        args.uploadpack = data->uploadpack;
 634        args.keep_pack = data->keep;
 635        args.lock_pack = 1;
 636        args.use_thin_pack = data->thin;
 637        args.include_tag = data->followtags;
 638        args.verbose = (transport->verbose > 0);
 639        args.quiet = (transport->verbose < 0);
 640        args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 641        args.depth = data->depth;
 642
 643        for (i = 0; i < nr_heads; i++)
 644                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 645
 646        if (!data->conn) {
 647                connect_setup(transport, 0, 0);
 648                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 649        }
 650
 651        refs = fetch_pack(&args, data->fd, data->conn,
 652                          refs_tmp ? refs_tmp : transport->remote_refs,
 653                          dest, nr_heads, heads, &transport->pack_lockfile);
 654        close(data->fd[0]);
 655        close(data->fd[1]);
 656        if (finish_connect(data->conn))
 657                refs = NULL;
 658        data->conn = NULL;
 659
 660        free_refs(refs_tmp);
 661
 662        for (i = 0; i < nr_heads; i++)
 663                free(origh[i]);
 664        free(origh);
 665        free(heads);
 666        free(dest);
 667        return (refs ? 0 : -1);
 668}
 669
 670static int push_had_errors(struct ref *ref)
 671{
 672        for (; ref; ref = ref->next) {
 673                switch (ref->status) {
 674                case REF_STATUS_NONE:
 675                case REF_STATUS_UPTODATE:
 676                case REF_STATUS_OK:
 677                        break;
 678                default:
 679                        return 1;
 680                }
 681        }
 682        return 0;
 683}
 684
 685static int refs_pushed(struct ref *ref)
 686{
 687        for (; ref; ref = ref->next) {
 688                switch(ref->status) {
 689                case REF_STATUS_NONE:
 690                case REF_STATUS_UPTODATE:
 691                        break;
 692                default:
 693                        return 1;
 694                }
 695        }
 696        return 0;
 697}
 698
 699static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 700{
 701        struct refspec rs;
 702
 703        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 704                return;
 705
 706        rs.src = ref->name;
 707        rs.dst = NULL;
 708
 709        if (!remote_find_tracking(remote, &rs)) {
 710                if (verbose)
 711                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 712                if (ref->deletion) {
 713                        delete_ref(rs.dst, NULL, 0);
 714                } else
 715                        update_ref("update by push", rs.dst,
 716                                        ref->new_sha1, NULL, 0, 0);
 717                free(rs.dst);
 718        }
 719}
 720
 721#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 722
 723static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 724{
 725        if (porcelain) {
 726                if (from)
 727                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 728                else
 729                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 730                if (msg)
 731                        fprintf(stdout, "%s (%s)\n", summary, msg);
 732                else
 733                        fprintf(stdout, "%s\n", summary);
 734        } else {
 735                fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 736                if (from)
 737                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 738                else
 739                        fputs(prettify_refname(to->name), stderr);
 740                if (msg) {
 741                        fputs(" (", stderr);
 742                        fputs(msg, stderr);
 743                        fputc(')', stderr);
 744                }
 745                fputc('\n', stderr);
 746        }
 747}
 748
 749static const char *status_abbrev(unsigned char sha1[20])
 750{
 751        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 752}
 753
 754static void print_ok_ref_status(struct ref *ref, int porcelain)
 755{
 756        if (ref->deletion)
 757                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 758        else if (is_null_sha1(ref->old_sha1))
 759                print_ref_status('*',
 760                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 761                        "[new branch]"),
 762                        ref, ref->peer_ref, NULL, porcelain);
 763        else {
 764                char quickref[84];
 765                char type;
 766                const char *msg;
 767
 768                strcpy(quickref, status_abbrev(ref->old_sha1));
 769                if (ref->nonfastforward) {
 770                        strcat(quickref, "...");
 771                        type = '+';
 772                        msg = "forced update";
 773                } else {
 774                        strcat(quickref, "..");
 775                        type = ' ';
 776                        msg = NULL;
 777                }
 778                strcat(quickref, status_abbrev(ref->new_sha1));
 779
 780                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 781        }
 782}
 783
 784static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 785{
 786        if (!count)
 787                fprintf(stderr, "To %s\n", dest);
 788
 789        switch(ref->status) {
 790        case REF_STATUS_NONE:
 791                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 792                break;
 793        case REF_STATUS_REJECT_NODELETE:
 794                print_ref_status('!', "[rejected]", ref, NULL,
 795                                                 "remote does not support deleting refs", porcelain);
 796                break;
 797        case REF_STATUS_UPTODATE:
 798                print_ref_status('=', "[up to date]", ref,
 799                                                 ref->peer_ref, NULL, porcelain);
 800                break;
 801        case REF_STATUS_REJECT_NONFASTFORWARD:
 802                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 803                                                 "non-fast forward", porcelain);
 804                break;
 805        case REF_STATUS_REMOTE_REJECT:
 806                print_ref_status('!', "[remote rejected]", ref,
 807                                                 ref->deletion ? NULL : ref->peer_ref,
 808                                                 ref->remote_status, porcelain);
 809                break;
 810        case REF_STATUS_EXPECTING_REPORT:
 811                print_ref_status('!', "[remote failure]", ref,
 812                                                 ref->deletion ? NULL : ref->peer_ref,
 813                                                 "remote failed to report status", porcelain);
 814                break;
 815        case REF_STATUS_OK:
 816                print_ok_ref_status(ref, porcelain);
 817                break;
 818        }
 819
 820        return 1;
 821}
 822
 823static void print_push_status(const char *dest, struct ref *refs,
 824                              int verbose, int porcelain, int * nonfastforward)
 825{
 826        struct ref *ref;
 827        int n = 0;
 828
 829        if (verbose) {
 830                for (ref = refs; ref; ref = ref->next)
 831                        if (ref->status == REF_STATUS_UPTODATE)
 832                                n += print_one_push_status(ref, dest, n, porcelain);
 833        }
 834
 835        for (ref = refs; ref; ref = ref->next)
 836                if (ref->status == REF_STATUS_OK)
 837                        n += print_one_push_status(ref, dest, n, porcelain);
 838
 839        *nonfastforward = 0;
 840        for (ref = refs; ref; ref = ref->next) {
 841                if (ref->status != REF_STATUS_NONE &&
 842                    ref->status != REF_STATUS_UPTODATE &&
 843                    ref->status != REF_STATUS_OK)
 844                        n += print_one_push_status(ref, dest, n, porcelain);
 845                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 846                        *nonfastforward = 1;
 847        }
 848}
 849
 850static void verify_remote_names(int nr_heads, const char **heads)
 851{
 852        int i;
 853
 854        for (i = 0; i < nr_heads; i++) {
 855                const char *local = heads[i];
 856                const char *remote = strrchr(heads[i], ':');
 857
 858                if (*local == '+')
 859                        local++;
 860
 861                /* A matching refspec is okay.  */
 862                if (remote == local && remote[1] == '\0')
 863                        continue;
 864
 865                remote = remote ? (remote + 1) : local;
 866                switch (check_ref_format(remote)) {
 867                case 0: /* ok */
 868                case CHECK_REF_FORMAT_ONELEVEL:
 869                        /* ok but a single level -- that is fine for
 870                         * a match pattern.
 871                         */
 872                case CHECK_REF_FORMAT_WILDCARD:
 873                        /* ok but ends with a pattern-match character */
 874                        continue;
 875                }
 876                die("remote part of refspec is not a valid name in %s",
 877                    heads[i]);
 878        }
 879}
 880
 881static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 882{
 883        struct git_transport_data *data = transport->data;
 884        struct send_pack_args args;
 885        int ret;
 886
 887        if (!data->conn) {
 888                struct ref *tmp_refs;
 889                connect_setup(transport, 1, 0);
 890
 891                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 892                                 NULL);
 893        }
 894
 895        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 896        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 897        args.use_thin_pack = data->thin;
 898        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 899        args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
 900        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 901
 902        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 903                        &data->extra_have);
 904
 905        close(data->fd[1]);
 906        close(data->fd[0]);
 907        ret |= finish_connect(data->conn);
 908        data->conn = NULL;
 909
 910        return ret;
 911}
 912
 913static int disconnect_git(struct transport *transport)
 914{
 915        struct git_transport_data *data = transport->data;
 916        if (data->conn) {
 917                packet_flush(data->fd[1]);
 918                close(data->fd[0]);
 919                close(data->fd[1]);
 920                finish_connect(data->conn);
 921        }
 922
 923        free(data);
 924        return 0;
 925}
 926
 927static int is_local(const char *url)
 928{
 929        const char *colon = strchr(url, ':');
 930        const char *slash = strchr(url, '/');
 931        return !colon || (slash && slash < colon) ||
 932                has_dos_drive_prefix(url);
 933}
 934
 935static int is_file(const char *url)
 936{
 937        struct stat buf;
 938        if (stat(url, &buf))
 939                return 0;
 940        return S_ISREG(buf.st_mode);
 941}
 942
 943struct transport *transport_get(struct remote *remote, const char *url)
 944{
 945        struct transport *ret = xcalloc(1, sizeof(*ret));
 946
 947        ret->remote = remote;
 948        ret->url = url;
 949
 950        if (!prefixcmp(url, "rsync:")) {
 951                ret->get_refs_list = get_refs_via_rsync;
 952                ret->fetch = fetch_objs_via_rsync;
 953                ret->push = rsync_transport_push;
 954
 955        } else if (!prefixcmp(url, "http://")
 956                || !prefixcmp(url, "https://")
 957                || !prefixcmp(url, "ftp://")) {
 958#ifdef NO_CURL
 959                error("git was compiled without libcurl support.");
 960#else
 961                ret->get_refs_list = get_refs_via_curl;
 962                ret->fetch = fetch_objs_via_curl;
 963                ret->push = curl_transport_push;
 964#endif
 965                ret->disconnect = disconnect_walker;
 966
 967        } else if (is_local(url) && is_file(url)) {
 968                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 969                ret->data = data;
 970                ret->get_refs_list = get_refs_from_bundle;
 971                ret->fetch = fetch_refs_from_bundle;
 972                ret->disconnect = close_bundle;
 973
 974        } else {
 975                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 976                ret->data = data;
 977                ret->set_option = set_git_option;
 978                ret->get_refs_list = get_refs_via_connect;
 979                ret->fetch = fetch_refs_via_pack;
 980                ret->push_refs = git_transport_push;
 981                ret->disconnect = disconnect_git;
 982
 983                data->thin = 1;
 984                data->conn = NULL;
 985                data->uploadpack = "git-upload-pack";
 986                if (remote && remote->uploadpack)
 987                        data->uploadpack = remote->uploadpack;
 988                data->receivepack = "git-receive-pack";
 989                if (remote && remote->receivepack)
 990                        data->receivepack = remote->receivepack;
 991        }
 992
 993        return ret;
 994}
 995
 996int transport_set_option(struct transport *transport,
 997                         const char *name, const char *value)
 998{
 999        if (transport->set_option)
1000                return transport->set_option(transport, name, value);
1001        return 1;
1002}
1003
1004int transport_push(struct transport *transport,
1005                   int refspec_nr, const char **refspec, int flags,
1006                   int * nonfastforward)
1007{
1008        verify_remote_names(refspec_nr, refspec);
1009
1010        if (transport->push)
1011                return transport->push(transport, refspec_nr, refspec, flags);
1012        if (transport->push_refs) {
1013                struct ref *remote_refs =
1014                        transport->get_refs_list(transport, 1);
1015                struct ref *local_refs = get_local_heads();
1016                int match_flags = MATCH_REFS_NONE;
1017                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1018                int quiet = flags & TRANSPORT_PUSH_QUIET;
1019                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1020                int ret;
1021
1022                if (flags & TRANSPORT_PUSH_ALL)
1023                        match_flags |= MATCH_REFS_ALL;
1024                if (flags & TRANSPORT_PUSH_MIRROR)
1025                        match_flags |= MATCH_REFS_MIRROR;
1026
1027                if (match_refs(local_refs, &remote_refs,
1028                               refspec_nr, refspec, match_flags)) {
1029                        return -1;
1030                }
1031
1032                ret = transport->push_refs(transport, remote_refs, flags);
1033
1034                if (!quiet || push_had_errors(remote_refs))
1035                        print_push_status(transport->url, remote_refs,
1036                                        verbose | porcelain, porcelain,
1037                                        nonfastforward);
1038
1039                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1040                        struct ref *ref;
1041                        for (ref = remote_refs; ref; ref = ref->next)
1042                                update_tracking_ref(transport->remote, ref, verbose);
1043                }
1044
1045                if (!ret && !refs_pushed(remote_refs))
1046                        fprintf(stderr, "Everything up-to-date\n");
1047                return ret;
1048        }
1049        return 1;
1050}
1051
1052const struct ref *transport_get_remote_refs(struct transport *transport)
1053{
1054        if (!transport->remote_refs)
1055                transport->remote_refs = transport->get_refs_list(transport, 0);
1056        return transport->remote_refs;
1057}
1058
1059int transport_fetch_refs(struct transport *transport, const struct ref *refs)
1060{
1061        int rc;
1062        int nr_heads = 0, nr_alloc = 0;
1063        const struct ref **heads = NULL;
1064        const struct ref *rm;
1065
1066        for (rm = refs; rm; rm = rm->next) {
1067                if (rm->peer_ref &&
1068                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1069                        continue;
1070                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1071                heads[nr_heads++] = rm;
1072        }
1073
1074        rc = transport->fetch(transport, nr_heads, heads);
1075        free(heads);
1076        return rc;
1077}
1078
1079void transport_unlock_pack(struct transport *transport)
1080{
1081        if (transport->pack_lockfile) {
1082                unlink_or_warn(transport->pack_lockfile);
1083                free(transport->pack_lockfile);
1084                transport->pack_lockfile = NULL;
1085        }
1086}
1087
1088int transport_disconnect(struct transport *transport)
1089{
1090        int ret = 0;
1091        if (transport->disconnect)
1092                ret = transport->disconnect(transport);
1093        free(transport);
1094        return ret;
1095}
1096
1097/*
1098 * Strip username (and password) from an url and return
1099 * it in a newly allocated string.
1100 */
1101char *transport_anonymize_url(const char *url)
1102{
1103        char *anon_url, *scheme_prefix, *anon_part;
1104        size_t anon_len, prefix_len = 0;
1105
1106        anon_part = strchr(url, '@');
1107        if (is_local(url) || !anon_part)
1108                goto literal_copy;
1109
1110        anon_len = strlen(++anon_part);
1111        scheme_prefix = strstr(url, "://");
1112        if (!scheme_prefix) {
1113                if (!strchr(anon_part, ':'))
1114                        /* cannot be "me@there:/path/name" */
1115                        goto literal_copy;
1116        } else {
1117                const char *cp;
1118                /* make sure scheme is reasonable */
1119                for (cp = url; cp < scheme_prefix; cp++) {
1120                        switch (*cp) {
1121                                /* RFC 1738 2.1 */
1122                        case '+': case '.': case '-':
1123                                break; /* ok */
1124                        default:
1125                                if (isalnum(*cp))
1126                                        break;
1127                                /* it isn't */
1128                                goto literal_copy;
1129                        }
1130                }
1131                /* @ past the first slash does not count */
1132                cp = strchr(scheme_prefix + 3, '/');
1133                if (cp && cp < anon_part)
1134                        goto literal_copy;
1135                prefix_len = scheme_prefix - url + 3;
1136        }
1137        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1138        memcpy(anon_url, url, prefix_len);
1139        memcpy(anon_url + prefix_len, anon_part, anon_len);
1140        return anon_url;
1141literal_copy:
1142        return xstrdup(url);
1143}