e6eb20ea947eb54ebc3cc78d38f6b3dae1864195
   1#include "cache.h"
   2#include "transport.h"
   3#include "run-command.h"
   4#include "pkt-line.h"
   5#include "fetch-pack.h"
   6#include "send-pack.h"
   7#include "walker.h"
   8#include "bundle.h"
   9#include "dir.h"
  10#include "refs.h"
  11
  12/* rsync support */
  13
  14/*
  15 * We copy packed-refs and refs/ into a temporary file, then read the
  16 * loose refs recursively (sorting whenever possible), and then inserting
  17 * those packed refs that are not yet in the list (not validating, but
  18 * assuming that the file is sorted).
  19 *
  20 * Appears refactoring this from refs.c is too cumbersome.
  21 */
  22
  23static int str_cmp(const void *a, const void *b)
  24{
  25        const char *s1 = a;
  26        const char *s2 = b;
  27
  28        return strcmp(s1, s2);
  29}
  30
  31/* path->buf + name_offset is expected to point to "refs/" */
  32
  33static int read_loose_refs(struct strbuf *path, int name_offset,
  34                struct ref **tail)
  35{
  36        DIR *dir = opendir(path->buf);
  37        struct dirent *de;
  38        struct {
  39                char **entries;
  40                int nr, alloc;
  41        } list;
  42        int i, pathlen;
  43
  44        if (!dir)
  45                return -1;
  46
  47        memset (&list, 0, sizeof(list));
  48
  49        while ((de = readdir(dir))) {
  50                if (is_dot_or_dotdot(de->d_name))
  51                        continue;
  52                ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  53                list.entries[list.nr++] = xstrdup(de->d_name);
  54        }
  55        closedir(dir);
  56
  57        /* sort the list */
  58
  59        qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  60
  61        pathlen = path->len;
  62        strbuf_addch(path, '/');
  63
  64        for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  65                strbuf_addstr(path, list.entries[i]);
  66                if (read_loose_refs(path, name_offset, tail)) {
  67                        int fd = open(path->buf, O_RDONLY);
  68                        char buffer[40];
  69                        struct ref *next;
  70
  71                        if (fd < 0)
  72                                continue;
  73                        next = alloc_ref(path->buf + name_offset);
  74                        if (read_in_full(fd, buffer, 40) != 40 ||
  75                                        get_sha1_hex(buffer, next->old_sha1)) {
  76                                close(fd);
  77                                free(next);
  78                                continue;
  79                        }
  80                        close(fd);
  81                        (*tail)->next = next;
  82                        *tail = next;
  83                }
  84        }
  85        strbuf_setlen(path, pathlen);
  86
  87        for (i = 0; i < list.nr; i++)
  88                free(list.entries[i]);
  89        free(list.entries);
  90
  91        return 0;
  92}
  93
  94/* insert the packed refs for which no loose refs were found */
  95
  96static void insert_packed_refs(const char *packed_refs, struct ref **list)
  97{
  98        FILE *f = fopen(packed_refs, "r");
  99        static char buffer[PATH_MAX];
 100
 101        if (!f)
 102                return;
 103
 104        for (;;) {
 105                int cmp = cmp, len;
 106
 107                if (!fgets(buffer, sizeof(buffer), f)) {
 108                        fclose(f);
 109                        return;
 110                }
 111
 112                if (hexval(buffer[0]) > 0xf)
 113                        continue;
 114                len = strlen(buffer);
 115                if (len && buffer[len - 1] == '\n')
 116                        buffer[--len] = '\0';
 117                if (len < 41)
 118                        continue;
 119                while ((*list)->next &&
 120                                (cmp = strcmp(buffer + 41,
 121                                      (*list)->next->name)) > 0)
 122                        list = &(*list)->next;
 123                if (!(*list)->next || cmp < 0) {
 124                        struct ref *next = alloc_ref(buffer + 41);
 125                        buffer[40] = '\0';
 126                        if (get_sha1_hex(buffer, next->old_sha1)) {
 127                                warning ("invalid SHA-1: %s", buffer);
 128                                free(next);
 129                                continue;
 130                        }
 131                        next->next = (*list)->next;
 132                        (*list)->next = next;
 133                        list = &(*list)->next;
 134                }
 135        }
 136}
 137
 138static const char *rsync_url(const char *url)
 139{
 140        return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 141}
 142
 143static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 144{
 145        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 146        struct ref dummy, *tail = &dummy;
 147        struct child_process rsync;
 148        const char *args[5];
 149        int temp_dir_len;
 150
 151        if (for_push)
 152                return NULL;
 153
 154        /* copy the refs to the temporary directory */
 155
 156        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 157        if (!mkdtemp(temp_dir.buf))
 158                die_errno ("Could not make temporary directory");
 159        temp_dir_len = temp_dir.len;
 160
 161        strbuf_addstr(&buf, rsync_url(transport->url));
 162        strbuf_addstr(&buf, "/refs");
 163
 164        memset(&rsync, 0, sizeof(rsync));
 165        rsync.argv = args;
 166        rsync.stdout_to_stderr = 1;
 167        args[0] = "rsync";
 168        args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 169        args[2] = buf.buf;
 170        args[3] = temp_dir.buf;
 171        args[4] = NULL;
 172
 173        if (run_command(&rsync))
 174                die ("Could not run rsync to get refs");
 175
 176        strbuf_reset(&buf);
 177        strbuf_addstr(&buf, rsync_url(transport->url));
 178        strbuf_addstr(&buf, "/packed-refs");
 179
 180        args[2] = buf.buf;
 181
 182        if (run_command(&rsync))
 183                die ("Could not run rsync to get refs");
 184
 185        /* read the copied refs */
 186
 187        strbuf_addstr(&temp_dir, "/refs");
 188        read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 189        strbuf_setlen(&temp_dir, temp_dir_len);
 190
 191        tail = &dummy;
 192        strbuf_addstr(&temp_dir, "/packed-refs");
 193        insert_packed_refs(temp_dir.buf, &tail);
 194        strbuf_setlen(&temp_dir, temp_dir_len);
 195
 196        if (remove_dir_recursively(&temp_dir, 0))
 197                warning ("Error removing temporary directory %s.",
 198                                temp_dir.buf);
 199
 200        strbuf_release(&buf);
 201        strbuf_release(&temp_dir);
 202
 203        return dummy.next;
 204}
 205
 206static int fetch_objs_via_rsync(struct transport *transport,
 207                                int nr_objs, struct ref **to_fetch)
 208{
 209        struct strbuf buf = STRBUF_INIT;
 210        struct child_process rsync;
 211        const char *args[8];
 212        int result;
 213
 214        strbuf_addstr(&buf, rsync_url(transport->url));
 215        strbuf_addstr(&buf, "/objects/");
 216
 217        memset(&rsync, 0, sizeof(rsync));
 218        rsync.argv = args;
 219        rsync.stdout_to_stderr = 1;
 220        args[0] = "rsync";
 221        args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 222        args[2] = "--ignore-existing";
 223        args[3] = "--exclude";
 224        args[4] = "info";
 225        args[5] = buf.buf;
 226        args[6] = get_object_directory();
 227        args[7] = NULL;
 228
 229        /* NEEDSWORK: handle one level of alternates */
 230        result = run_command(&rsync);
 231
 232        strbuf_release(&buf);
 233
 234        return result;
 235}
 236
 237static int write_one_ref(const char *name, const unsigned char *sha1,
 238                int flags, void *data)
 239{
 240        struct strbuf *buf = data;
 241        int len = buf->len;
 242        FILE *f;
 243
 244        /* when called via for_each_ref(), flags is non-zero */
 245        if (flags && prefixcmp(name, "refs/heads/") &&
 246                        prefixcmp(name, "refs/tags/"))
 247                return 0;
 248
 249        strbuf_addstr(buf, name);
 250        if (safe_create_leading_directories(buf->buf) ||
 251                        !(f = fopen(buf->buf, "w")) ||
 252                        fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 253                        fclose(f))
 254                return error("problems writing temporary file %s", buf->buf);
 255        strbuf_setlen(buf, len);
 256        return 0;
 257}
 258
 259static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 260                int refspec_nr, const char **refspec)
 261{
 262        int i;
 263
 264        for (i = 0; i < refspec_nr; i++) {
 265                unsigned char sha1[20];
 266                char *ref;
 267
 268                if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 269                        return error("Could not get ref %s", refspec[i]);
 270
 271                if (write_one_ref(ref, sha1, 0, temp_dir)) {
 272                        free(ref);
 273                        return -1;
 274                }
 275                free(ref);
 276        }
 277        return 0;
 278}
 279
 280static int rsync_transport_push(struct transport *transport,
 281                int refspec_nr, const char **refspec, int flags)
 282{
 283        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 284        int result = 0, i;
 285        struct child_process rsync;
 286        const char *args[10];
 287
 288        if (flags & TRANSPORT_PUSH_MIRROR)
 289                return error("rsync transport does not support mirror mode");
 290
 291        /* first push the objects */
 292
 293        strbuf_addstr(&buf, rsync_url(transport->url));
 294        strbuf_addch(&buf, '/');
 295
 296        memset(&rsync, 0, sizeof(rsync));
 297        rsync.argv = args;
 298        rsync.stdout_to_stderr = 1;
 299        i = 0;
 300        args[i++] = "rsync";
 301        args[i++] = "-a";
 302        if (flags & TRANSPORT_PUSH_DRY_RUN)
 303                args[i++] = "--dry-run";
 304        if (transport->verbose > 0)
 305                args[i++] = "-v";
 306        args[i++] = "--ignore-existing";
 307        args[i++] = "--exclude";
 308        args[i++] = "info";
 309        args[i++] = get_object_directory();
 310        args[i++] = buf.buf;
 311        args[i++] = NULL;
 312
 313        if (run_command(&rsync))
 314                return error("Could not push objects to %s",
 315                                rsync_url(transport->url));
 316
 317        /* copy the refs to the temporary directory; they could be packed. */
 318
 319        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 320        if (!mkdtemp(temp_dir.buf))
 321                die_errno ("Could not make temporary directory");
 322        strbuf_addch(&temp_dir, '/');
 323
 324        if (flags & TRANSPORT_PUSH_ALL) {
 325                if (for_each_ref(write_one_ref, &temp_dir))
 326                        return -1;
 327        } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 328                return -1;
 329
 330        i = 2;
 331        if (flags & TRANSPORT_PUSH_DRY_RUN)
 332                args[i++] = "--dry-run";
 333        if (!(flags & TRANSPORT_PUSH_FORCE))
 334                args[i++] = "--ignore-existing";
 335        args[i++] = temp_dir.buf;
 336        args[i++] = rsync_url(transport->url);
 337        args[i++] = NULL;
 338        if (run_command(&rsync))
 339                result = error("Could not push to %s",
 340                                rsync_url(transport->url));
 341
 342        if (remove_dir_recursively(&temp_dir, 0))
 343                warning ("Could not remove temporary directory %s.",
 344                                temp_dir.buf);
 345
 346        strbuf_release(&buf);
 347        strbuf_release(&temp_dir);
 348
 349        return result;
 350}
 351
 352struct bundle_transport_data {
 353        int fd;
 354        struct bundle_header header;
 355};
 356
 357static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 358{
 359        struct bundle_transport_data *data = transport->data;
 360        struct ref *result = NULL;
 361        int i;
 362
 363        if (for_push)
 364                return NULL;
 365
 366        if (data->fd > 0)
 367                close(data->fd);
 368        data->fd = read_bundle_header(transport->url, &data->header);
 369        if (data->fd < 0)
 370                die ("Could not read bundle '%s'.", transport->url);
 371        for (i = 0; i < data->header.references.nr; i++) {
 372                struct ref_list_entry *e = data->header.references.list + i;
 373                struct ref *ref = alloc_ref(e->name);
 374                hashcpy(ref->old_sha1, e->sha1);
 375                ref->next = result;
 376                result = ref;
 377        }
 378        return result;
 379}
 380
 381static int fetch_refs_from_bundle(struct transport *transport,
 382                               int nr_heads, struct ref **to_fetch)
 383{
 384        struct bundle_transport_data *data = transport->data;
 385        return unbundle(&data->header, data->fd);
 386}
 387
 388static int close_bundle(struct transport *transport)
 389{
 390        struct bundle_transport_data *data = transport->data;
 391        if (data->fd > 0)
 392                close(data->fd);
 393        free(data);
 394        return 0;
 395}
 396
 397struct git_transport_data {
 398        struct git_transport_options options;
 399        struct child_process *conn;
 400        int fd[2];
 401        struct extra_have_objects extra_have;
 402};
 403
 404static int set_git_option(struct git_transport_options *opts,
 405                          const char *name, const char *value)
 406{
 407        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 408                opts->uploadpack = value;
 409                return 0;
 410        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 411                opts->receivepack = value;
 412                return 0;
 413        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 414                opts->thin = !!value;
 415                return 0;
 416        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 417                opts->followtags = !!value;
 418                return 0;
 419        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 420                opts->keep = !!value;
 421                return 0;
 422        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 423                if (!value)
 424                        opts->depth = 0;
 425                else
 426                        opts->depth = atoi(value);
 427                return 0;
 428        }
 429        return 1;
 430}
 431
 432static int connect_setup(struct transport *transport, int for_push, int verbose)
 433{
 434        struct git_transport_data *data = transport->data;
 435        data->conn = git_connect(data->fd, transport->url,
 436                                 for_push ? data->options.receivepack :
 437                                 data->options.uploadpack,
 438                                 verbose ? CONNECT_VERBOSE : 0);
 439        return 0;
 440}
 441
 442static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 443{
 444        struct git_transport_data *data = transport->data;
 445        struct ref *refs;
 446
 447        connect_setup(transport, for_push, 0);
 448        get_remote_heads(data->fd[0], &refs, 0, NULL,
 449                         for_push ? REF_NORMAL : 0, &data->extra_have);
 450
 451        return refs;
 452}
 453
 454static int fetch_refs_via_pack(struct transport *transport,
 455                               int nr_heads, struct ref **to_fetch)
 456{
 457        struct git_transport_data *data = transport->data;
 458        char **heads = xmalloc(nr_heads * sizeof(*heads));
 459        char **origh = xmalloc(nr_heads * sizeof(*origh));
 460        const struct ref *refs;
 461        char *dest = xstrdup(transport->url);
 462        struct fetch_pack_args args;
 463        int i;
 464        struct ref *refs_tmp = NULL;
 465
 466        memset(&args, 0, sizeof(args));
 467        args.uploadpack = data->options.uploadpack;
 468        args.keep_pack = data->options.keep;
 469        args.lock_pack = 1;
 470        args.use_thin_pack = data->options.thin;
 471        args.include_tag = data->options.followtags;
 472        args.verbose = (transport->verbose > 0);
 473        args.quiet = (transport->verbose < 0);
 474        args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 475        args.depth = data->options.depth;
 476
 477        for (i = 0; i < nr_heads; i++)
 478                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 479
 480        if (!data->conn) {
 481                connect_setup(transport, 0, 0);
 482                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 483        }
 484
 485        refs = fetch_pack(&args, data->fd, data->conn,
 486                          refs_tmp ? refs_tmp : transport->remote_refs,
 487                          dest, nr_heads, heads, &transport->pack_lockfile);
 488        close(data->fd[0]);
 489        close(data->fd[1]);
 490        if (finish_connect(data->conn))
 491                refs = NULL;
 492        data->conn = NULL;
 493
 494        free_refs(refs_tmp);
 495
 496        for (i = 0; i < nr_heads; i++)
 497                free(origh[i]);
 498        free(origh);
 499        free(heads);
 500        free(dest);
 501        return (refs ? 0 : -1);
 502}
 503
 504static int push_had_errors(struct ref *ref)
 505{
 506        for (; ref; ref = ref->next) {
 507                switch (ref->status) {
 508                case REF_STATUS_NONE:
 509                case REF_STATUS_UPTODATE:
 510                case REF_STATUS_OK:
 511                        break;
 512                default:
 513                        return 1;
 514                }
 515        }
 516        return 0;
 517}
 518
 519static int refs_pushed(struct ref *ref)
 520{
 521        for (; ref; ref = ref->next) {
 522                switch(ref->status) {
 523                case REF_STATUS_NONE:
 524                case REF_STATUS_UPTODATE:
 525                        break;
 526                default:
 527                        return 1;
 528                }
 529        }
 530        return 0;
 531}
 532
 533static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 534{
 535        struct refspec rs;
 536
 537        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 538                return;
 539
 540        rs.src = ref->name;
 541        rs.dst = NULL;
 542
 543        if (!remote_find_tracking(remote, &rs)) {
 544                if (verbose)
 545                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 546                if (ref->deletion) {
 547                        delete_ref(rs.dst, NULL, 0);
 548                } else
 549                        update_ref("update by push", rs.dst,
 550                                        ref->new_sha1, NULL, 0, 0);
 551                free(rs.dst);
 552        }
 553}
 554
 555#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 556
 557static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 558{
 559        if (porcelain) {
 560                if (from)
 561                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 562                else
 563                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 564                if (msg)
 565                        fprintf(stdout, "%s (%s)\n", summary, msg);
 566                else
 567                        fprintf(stdout, "%s\n", summary);
 568        } else {
 569                fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 570                if (from)
 571                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 572                else
 573                        fputs(prettify_refname(to->name), stderr);
 574                if (msg) {
 575                        fputs(" (", stderr);
 576                        fputs(msg, stderr);
 577                        fputc(')', stderr);
 578                }
 579                fputc('\n', stderr);
 580        }
 581}
 582
 583static const char *status_abbrev(unsigned char sha1[20])
 584{
 585        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 586}
 587
 588static void print_ok_ref_status(struct ref *ref, int porcelain)
 589{
 590        if (ref->deletion)
 591                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 592        else if (is_null_sha1(ref->old_sha1))
 593                print_ref_status('*',
 594                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 595                        "[new branch]"),
 596                        ref, ref->peer_ref, NULL, porcelain);
 597        else {
 598                char quickref[84];
 599                char type;
 600                const char *msg;
 601
 602                strcpy(quickref, status_abbrev(ref->old_sha1));
 603                if (ref->nonfastforward) {
 604                        strcat(quickref, "...");
 605                        type = '+';
 606                        msg = "forced update";
 607                } else {
 608                        strcat(quickref, "..");
 609                        type = ' ';
 610                        msg = NULL;
 611                }
 612                strcat(quickref, status_abbrev(ref->new_sha1));
 613
 614                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 615        }
 616}
 617
 618static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 619{
 620        if (!count)
 621                fprintf(stderr, "To %s\n", dest);
 622
 623        switch(ref->status) {
 624        case REF_STATUS_NONE:
 625                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 626                break;
 627        case REF_STATUS_REJECT_NODELETE:
 628                print_ref_status('!', "[rejected]", ref, NULL,
 629                                                 "remote does not support deleting refs", porcelain);
 630                break;
 631        case REF_STATUS_UPTODATE:
 632                print_ref_status('=', "[up to date]", ref,
 633                                                 ref->peer_ref, NULL, porcelain);
 634                break;
 635        case REF_STATUS_REJECT_NONFASTFORWARD:
 636                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 637                                                 "non-fast-forward", porcelain);
 638                break;
 639        case REF_STATUS_REMOTE_REJECT:
 640                print_ref_status('!', "[remote rejected]", ref,
 641                                                 ref->deletion ? NULL : ref->peer_ref,
 642                                                 ref->remote_status, porcelain);
 643                break;
 644        case REF_STATUS_EXPECTING_REPORT:
 645                print_ref_status('!', "[remote failure]", ref,
 646                                                 ref->deletion ? NULL : ref->peer_ref,
 647                                                 "remote failed to report status", porcelain);
 648                break;
 649        case REF_STATUS_OK:
 650                print_ok_ref_status(ref, porcelain);
 651                break;
 652        }
 653
 654        return 1;
 655}
 656
 657static void print_push_status(const char *dest, struct ref *refs,
 658                              int verbose, int porcelain, int * nonfastforward)
 659{
 660        struct ref *ref;
 661        int n = 0;
 662
 663        if (verbose) {
 664                for (ref = refs; ref; ref = ref->next)
 665                        if (ref->status == REF_STATUS_UPTODATE)
 666                                n += print_one_push_status(ref, dest, n, porcelain);
 667        }
 668
 669        for (ref = refs; ref; ref = ref->next)
 670                if (ref->status == REF_STATUS_OK)
 671                        n += print_one_push_status(ref, dest, n, porcelain);
 672
 673        *nonfastforward = 0;
 674        for (ref = refs; ref; ref = ref->next) {
 675                if (ref->status != REF_STATUS_NONE &&
 676                    ref->status != REF_STATUS_UPTODATE &&
 677                    ref->status != REF_STATUS_OK)
 678                        n += print_one_push_status(ref, dest, n, porcelain);
 679                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 680                        *nonfastforward = 1;
 681        }
 682}
 683
 684static void verify_remote_names(int nr_heads, const char **heads)
 685{
 686        int i;
 687
 688        for (i = 0; i < nr_heads; i++) {
 689                const char *local = heads[i];
 690                const char *remote = strrchr(heads[i], ':');
 691
 692                if (*local == '+')
 693                        local++;
 694
 695                /* A matching refspec is okay.  */
 696                if (remote == local && remote[1] == '\0')
 697                        continue;
 698
 699                remote = remote ? (remote + 1) : local;
 700                switch (check_ref_format(remote)) {
 701                case 0: /* ok */
 702                case CHECK_REF_FORMAT_ONELEVEL:
 703                        /* ok but a single level -- that is fine for
 704                         * a match pattern.
 705                         */
 706                case CHECK_REF_FORMAT_WILDCARD:
 707                        /* ok but ends with a pattern-match character */
 708                        continue;
 709                }
 710                die("remote part of refspec is not a valid name in %s",
 711                    heads[i]);
 712        }
 713}
 714
 715static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 716{
 717        struct git_transport_data *data = transport->data;
 718        struct send_pack_args args;
 719        int ret;
 720
 721        if (!data->conn) {
 722                struct ref *tmp_refs;
 723                connect_setup(transport, 1, 0);
 724
 725                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 726                                 NULL);
 727        }
 728
 729        memset(&args, 0, sizeof(args));
 730        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 731        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 732        args.use_thin_pack = data->options.thin;
 733        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 734        args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
 735        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 736
 737        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 738                        &data->extra_have);
 739
 740        close(data->fd[1]);
 741        close(data->fd[0]);
 742        ret |= finish_connect(data->conn);
 743        data->conn = NULL;
 744
 745        return ret;
 746}
 747
 748static int disconnect_git(struct transport *transport)
 749{
 750        struct git_transport_data *data = transport->data;
 751        if (data->conn) {
 752                packet_flush(data->fd[1]);
 753                close(data->fd[0]);
 754                close(data->fd[1]);
 755                finish_connect(data->conn);
 756        }
 757
 758        free(data);
 759        return 0;
 760}
 761
 762static int is_local(const char *url)
 763{
 764        const char *colon = strchr(url, ':');
 765        const char *slash = strchr(url, '/');
 766        return !colon || (slash && slash < colon) ||
 767                has_dos_drive_prefix(url);
 768}
 769
 770static int is_file(const char *url)
 771{
 772        struct stat buf;
 773        if (stat(url, &buf))
 774                return 0;
 775        return S_ISREG(buf.st_mode);
 776}
 777
 778static int is_url(const char *url)
 779{
 780        const char *url2, *first_slash;
 781
 782        if (!url)
 783                return 0;
 784        url2 = url;
 785        first_slash = strchr(url, '/');
 786
 787        /* Input with no slash at all or slash first can't be URL. */
 788        if (!first_slash || first_slash == url)
 789                return 0;
 790        /* Character before must be : and next must be /. */
 791        if (first_slash[-1] != ':' || first_slash[1] != '/')
 792                return 0;
 793        /* There must be something before the :// */
 794        if (first_slash == url + 1)
 795                return 0;
 796        /*
 797         * Check all characters up to first slash - 1. Only alphanum
 798         * is allowed.
 799         */
 800        url2 = url;
 801        while (url2 < first_slash - 1) {
 802                if (!isalnum((unsigned char)*url2))
 803                        return 0;
 804                url2++;
 805        }
 806
 807        /* Valid enough. */
 808        return 1;
 809}
 810
 811static int external_specification_len(const char *url)
 812{
 813        return strchr(url, ':') - url;
 814}
 815
 816struct transport *transport_get(struct remote *remote, const char *url)
 817{
 818        struct transport *ret = xcalloc(1, sizeof(*ret));
 819
 820        if (!remote)
 821                die("No remote provided to transport_get()");
 822
 823        ret->remote = remote;
 824
 825        if (!url && remote && remote->url)
 826                url = remote->url[0];
 827        ret->url = url;
 828
 829        /* maybe it is a foreign URL? */
 830        if (url) {
 831                const char *p = url;
 832
 833                while (isalnum(*p))
 834                        p++;
 835                if (!prefixcmp(p, "::"))
 836                        remote->foreign_vcs = xstrndup(url, p - url);
 837        }
 838
 839        if (remote && remote->foreign_vcs) {
 840                transport_helper_init(ret, remote->foreign_vcs);
 841        } else if (!prefixcmp(url, "rsync:")) {
 842                ret->get_refs_list = get_refs_via_rsync;
 843                ret->fetch = fetch_objs_via_rsync;
 844                ret->push = rsync_transport_push;
 845                ret->smart_options = NULL;
 846        } else if (is_local(url) && is_file(url)) {
 847                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 848                ret->data = data;
 849                ret->get_refs_list = get_refs_from_bundle;
 850                ret->fetch = fetch_refs_from_bundle;
 851                ret->disconnect = close_bundle;
 852                ret->smart_options = NULL;
 853        } else if (!is_url(url)
 854                || !prefixcmp(url, "file://")
 855                || !prefixcmp(url, "git://")
 856                || !prefixcmp(url, "ssh://")
 857                || !prefixcmp(url, "git+ssh://")
 858                || !prefixcmp(url, "ssh+git://")) {
 859                /* These are builtin smart transports. */
 860                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 861                ret->data = data;
 862                ret->set_option = NULL;
 863                ret->get_refs_list = get_refs_via_connect;
 864                ret->fetch = fetch_refs_via_pack;
 865                ret->push_refs = git_transport_push;
 866                ret->disconnect = disconnect_git;
 867                ret->smart_options = &(data->options);
 868
 869                data->conn = NULL;
 870        } else if (!prefixcmp(url, "http://")
 871                || !prefixcmp(url, "https://")
 872                || !prefixcmp(url, "ftp://")) {
 873                /* These three are just plain special. */
 874                transport_helper_init(ret, "curl");
 875#ifdef NO_CURL
 876                error("git was compiled without libcurl support.");
 877#endif
 878        } else {
 879                /* Unknown protocol in URL. Pass to external handler. */
 880                int len = external_specification_len(url);
 881                char *handler = xmalloc(len + 1);
 882                handler[len] = 0;
 883                strncpy(handler, url, len);
 884                transport_helper_init(ret, handler);
 885        }
 886
 887        if (ret->smart_options) {
 888                ret->smart_options->thin = 1;
 889                ret->smart_options->uploadpack = "git-upload-pack";
 890                if (remote->uploadpack)
 891                        ret->smart_options->uploadpack = remote->uploadpack;
 892                ret->smart_options->receivepack = "git-receive-pack";
 893                if (remote->receivepack)
 894                        ret->smart_options->receivepack = remote->receivepack;
 895        }
 896
 897        return ret;
 898}
 899
 900int transport_set_option(struct transport *transport,
 901                         const char *name, const char *value)
 902{
 903        int git_reports = 1, protocol_reports = 1;
 904
 905        if (transport->smart_options)
 906                git_reports = set_git_option(transport->smart_options,
 907                                             name, value);
 908
 909        if (transport->set_option)
 910                protocol_reports = transport->set_option(transport, name,
 911                                                        value);
 912
 913        /* If either report is 0, report 0 (success). */
 914        if (!git_reports || !protocol_reports)
 915                return 0;
 916        /* If either reports -1 (invalid value), report -1. */
 917        if ((git_reports == -1) || (protocol_reports == -1))
 918                return -1;
 919        /* Otherwise if both report unknown, report unknown. */
 920        return 1;
 921}
 922
 923int transport_push(struct transport *transport,
 924                   int refspec_nr, const char **refspec, int flags,
 925                   int *nonfastforward)
 926{
 927        *nonfastforward = 0;
 928        verify_remote_names(refspec_nr, refspec);
 929
 930        if (transport->push)
 931                return transport->push(transport, refspec_nr, refspec, flags);
 932        if (transport->push_refs) {
 933                struct ref *remote_refs =
 934                        transport->get_refs_list(transport, 1);
 935                struct ref *local_refs = get_local_heads();
 936                int match_flags = MATCH_REFS_NONE;
 937                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
 938                int quiet = flags & TRANSPORT_PUSH_QUIET;
 939                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 940                int ret;
 941
 942                if (flags & TRANSPORT_PUSH_ALL)
 943                        match_flags |= MATCH_REFS_ALL;
 944                if (flags & TRANSPORT_PUSH_MIRROR)
 945                        match_flags |= MATCH_REFS_MIRROR;
 946
 947                if (match_refs(local_refs, &remote_refs,
 948                               refspec_nr, refspec, match_flags)) {
 949                        return -1;
 950                }
 951
 952                ret = transport->push_refs(transport, remote_refs, flags);
 953
 954                if (!quiet || push_had_errors(remote_refs))
 955                        print_push_status(transport->url, remote_refs,
 956                                        verbose | porcelain, porcelain,
 957                                        nonfastforward);
 958
 959                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 960                        struct ref *ref;
 961                        for (ref = remote_refs; ref; ref = ref->next)
 962                                update_tracking_ref(transport->remote, ref, verbose);
 963                }
 964
 965                if (!quiet && !ret && !refs_pushed(remote_refs))
 966                        fprintf(stderr, "Everything up-to-date\n");
 967                return ret;
 968        }
 969        return 1;
 970}
 971
 972const struct ref *transport_get_remote_refs(struct transport *transport)
 973{
 974        if (!transport->remote_refs)
 975                transport->remote_refs = transport->get_refs_list(transport, 0);
 976        return transport->remote_refs;
 977}
 978
 979int transport_fetch_refs(struct transport *transport, struct ref *refs)
 980{
 981        int rc;
 982        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 983        struct ref **heads = NULL;
 984        struct ref *rm;
 985
 986        for (rm = refs; rm; rm = rm->next) {
 987                nr_refs++;
 988                if (rm->peer_ref &&
 989                    !is_null_sha1(rm->old_sha1) &&
 990                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
 991                        continue;
 992                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 993                heads[nr_heads++] = rm;
 994        }
 995
 996        if (!nr_heads) {
 997                /*
 998                 * When deepening of a shallow repository is requested,
 999                 * then local and remote refs are likely to still be equal.
1000                 * Just feed them all to the fetch method in that case.
1001                 * This condition shouldn't be met in a non-deepening fetch
1002                 * (see builtin-fetch.c:quickfetch()).
1003                 */
1004                heads = xmalloc(nr_refs * sizeof(*heads));
1005                for (rm = refs; rm; rm = rm->next)
1006                        heads[nr_heads++] = rm;
1007        }
1008
1009        rc = transport->fetch(transport, nr_heads, heads);
1010        free(heads);
1011        return rc;
1012}
1013
1014void transport_unlock_pack(struct transport *transport)
1015{
1016        if (transport->pack_lockfile) {
1017                unlink_or_warn(transport->pack_lockfile);
1018                free(transport->pack_lockfile);
1019                transport->pack_lockfile = NULL;
1020        }
1021}
1022
1023int transport_disconnect(struct transport *transport)
1024{
1025        int ret = 0;
1026        if (transport->disconnect)
1027                ret = transport->disconnect(transport);
1028        free(transport);
1029        return ret;
1030}
1031
1032/*
1033 * Strip username (and password) from an url and return
1034 * it in a newly allocated string.
1035 */
1036char *transport_anonymize_url(const char *url)
1037{
1038        char *anon_url, *scheme_prefix, *anon_part;
1039        size_t anon_len, prefix_len = 0;
1040
1041        anon_part = strchr(url, '@');
1042        if (is_local(url) || !anon_part)
1043                goto literal_copy;
1044
1045        anon_len = strlen(++anon_part);
1046        scheme_prefix = strstr(url, "://");
1047        if (!scheme_prefix) {
1048                if (!strchr(anon_part, ':'))
1049                        /* cannot be "me@there:/path/name" */
1050                        goto literal_copy;
1051        } else {
1052                const char *cp;
1053                /* make sure scheme is reasonable */
1054                for (cp = url; cp < scheme_prefix; cp++) {
1055                        switch (*cp) {
1056                                /* RFC 1738 2.1 */
1057                        case '+': case '.': case '-':
1058                                break; /* ok */
1059                        default:
1060                                if (isalnum(*cp))
1061                                        break;
1062                                /* it isn't */
1063                                goto literal_copy;
1064                        }
1065                }
1066                /* @ past the first slash does not count */
1067                cp = strchr(scheme_prefix + 3, '/');
1068                if (cp && cp < anon_part)
1069                        goto literal_copy;
1070                prefix_len = scheme_prefix - url + 3;
1071        }
1072        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1073        memcpy(anon_url, url, prefix_len);
1074        memcpy(anon_url + prefix_len, anon_part, anon_len);
1075        return anon_url;
1076literal_copy:
1077        return xstrdup(url);
1078}