Andrew's git / gitweb.git / transport.c
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transport.con commit git: add --no-replace-objects option to disable replacing (b0fa7ab)
   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, const 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
 352#ifndef NO_CURL
 353static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
 354{
 355        const char **argv;
 356        int argc;
 357
 358        if (flags & TRANSPORT_PUSH_MIRROR)
 359                return error("http transport does not support mirror mode");
 360
 361        argv = xmalloc((refspec_nr + 12) * sizeof(char *));
 362        argv[0] = "http-push";
 363        argc = 1;
 364        if (flags & TRANSPORT_PUSH_ALL)
 365                argv[argc++] = "--all";
 366        if (flags & TRANSPORT_PUSH_FORCE)
 367                argv[argc++] = "--force";
 368        if (flags & TRANSPORT_PUSH_DRY_RUN)
 369                argv[argc++] = "--dry-run";
 370        if (flags & TRANSPORT_PUSH_VERBOSE)
 371                argv[argc++] = "--verbose";
 372        argv[argc++] = transport->url;
 373        while (refspec_nr--)
 374                argv[argc++] = *refspec++;
 375        argv[argc] = NULL;
 376        return !!run_command_v_opt(argv, RUN_GIT_CMD);
 377}
 378
 379#endif
 380
 381struct bundle_transport_data {
 382        int fd;
 383        struct bundle_header header;
 384};
 385
 386static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 387{
 388        struct bundle_transport_data *data = transport->data;
 389        struct ref *result = NULL;
 390        int i;
 391
 392        if (for_push)
 393                return NULL;
 394
 395        if (data->fd > 0)
 396                close(data->fd);
 397        data->fd = read_bundle_header(transport->url, &data->header);
 398        if (data->fd < 0)
 399                die ("Could not read bundle '%s'.", transport->url);
 400        for (i = 0; i < data->header.references.nr; i++) {
 401                struct ref_list_entry *e = data->header.references.list + i;
 402                struct ref *ref = alloc_ref(e->name);
 403                hashcpy(ref->old_sha1, e->sha1);
 404                ref->next = result;
 405                result = ref;
 406        }
 407        return result;
 408}
 409
 410static int fetch_refs_from_bundle(struct transport *transport,
 411                               int nr_heads, const struct ref **to_fetch)
 412{
 413        struct bundle_transport_data *data = transport->data;
 414        return unbundle(&data->header, data->fd);
 415}
 416
 417static int close_bundle(struct transport *transport)
 418{
 419        struct bundle_transport_data *data = transport->data;
 420        if (data->fd > 0)
 421                close(data->fd);
 422        free(data);
 423        return 0;
 424}
 425
 426struct git_transport_data {
 427        unsigned thin : 1;
 428        unsigned keep : 1;
 429        unsigned followtags : 1;
 430        int depth;
 431        struct child_process *conn;
 432        int fd[2];
 433        const char *uploadpack;
 434        const char *receivepack;
 435        struct extra_have_objects extra_have;
 436};
 437
 438static int set_git_option(struct transport *connection,
 439                          const char *name, const char *value)
 440{
 441        struct git_transport_data *data = connection->data;
 442        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 443                data->uploadpack = value;
 444                return 0;
 445        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 446                data->receivepack = value;
 447                return 0;
 448        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 449                data->thin = !!value;
 450                return 0;
 451        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 452                data->followtags = !!value;
 453                return 0;
 454        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 455                data->keep = !!value;
 456                return 0;
 457        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 458                if (!value)
 459                        data->depth = 0;
 460                else
 461                        data->depth = atoi(value);
 462                return 0;
 463        }
 464        return 1;
 465}
 466
 467static int connect_setup(struct transport *transport, int for_push, int verbose)
 468{
 469        struct git_transport_data *data = transport->data;
 470        data->conn = git_connect(data->fd, transport->url,
 471                                 for_push ? data->receivepack : data->uploadpack,
 472                                 verbose ? CONNECT_VERBOSE : 0);
 473        return 0;
 474}
 475
 476static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 477{
 478        struct git_transport_data *data = transport->data;
 479        struct ref *refs;
 480
 481        connect_setup(transport, for_push, 0);
 482        get_remote_heads(data->fd[0], &refs, 0, NULL,
 483                         for_push ? REF_NORMAL : 0, &data->extra_have);
 484
 485        return refs;
 486}
 487
 488static int fetch_refs_via_pack(struct transport *transport,
 489                               int nr_heads, const struct ref **to_fetch)
 490{
 491        struct git_transport_data *data = transport->data;
 492        char **heads = xmalloc(nr_heads * sizeof(*heads));
 493        char **origh = xmalloc(nr_heads * sizeof(*origh));
 494        const struct ref *refs;
 495        char *dest = xstrdup(transport->url);
 496        struct fetch_pack_args args;
 497        int i;
 498        struct ref *refs_tmp = NULL;
 499
 500        memset(&args, 0, sizeof(args));
 501        args.uploadpack = data->uploadpack;
 502        args.keep_pack = data->keep;
 503        args.lock_pack = 1;
 504        args.use_thin_pack = data->thin;
 505        args.include_tag = data->followtags;
 506        args.verbose = (transport->verbose > 0);
 507        args.quiet = (transport->verbose < 0);
 508        args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 509        args.depth = data->depth;
 510
 511        for (i = 0; i < nr_heads; i++)
 512                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 513
 514        if (!data->conn) {
 515                connect_setup(transport, 0, 0);
 516                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 517        }
 518
 519        refs = fetch_pack(&args, data->fd, data->conn,
 520                          refs_tmp ? refs_tmp : transport->remote_refs,
 521                          dest, nr_heads, heads, &transport->pack_lockfile);
 522        close(data->fd[0]);
 523        close(data->fd[1]);
 524        if (finish_connect(data->conn))
 525                refs = NULL;
 526        data->conn = NULL;
 527
 528        free_refs(refs_tmp);
 529
 530        for (i = 0; i < nr_heads; i++)
 531                free(origh[i]);
 532        free(origh);
 533        free(heads);
 534        free(dest);
 535        return (refs ? 0 : -1);
 536}
 537
 538static int push_had_errors(struct ref *ref)
 539{
 540        for (; ref; ref = ref->next) {
 541                switch (ref->status) {
 542                case REF_STATUS_NONE:
 543                case REF_STATUS_UPTODATE:
 544                case REF_STATUS_OK:
 545                        break;
 546                default:
 547                        return 1;
 548                }
 549        }
 550        return 0;
 551}
 552
 553static int refs_pushed(struct ref *ref)
 554{
 555        for (; ref; ref = ref->next) {
 556                switch(ref->status) {
 557                case REF_STATUS_NONE:
 558                case REF_STATUS_UPTODATE:
 559                        break;
 560                default:
 561                        return 1;
 562                }
 563        }
 564        return 0;
 565}
 566
 567static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 568{
 569        struct refspec rs;
 570
 571        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 572                return;
 573
 574        rs.src = ref->name;
 575        rs.dst = NULL;
 576
 577        if (!remote_find_tracking(remote, &rs)) {
 578                if (verbose)
 579                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 580                if (ref->deletion) {
 581                        delete_ref(rs.dst, NULL, 0);
 582                } else
 583                        update_ref("update by push", rs.dst,
 584                                        ref->new_sha1, NULL, 0, 0);
 585                free(rs.dst);
 586        }
 587}
 588
 589#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 590
 591static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 592{
 593        if (porcelain) {
 594                if (from)
 595                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 596                else
 597                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 598                if (msg)
 599                        fprintf(stdout, "%s (%s)\n", summary, msg);
 600                else
 601                        fprintf(stdout, "%s\n", summary);
 602        } else {
 603                fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 604                if (from)
 605                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 606                else
 607                        fputs(prettify_refname(to->name), stderr);
 608                if (msg) {
 609                        fputs(" (", stderr);
 610                        fputs(msg, stderr);
 611                        fputc(')', stderr);
 612                }
 613                fputc('\n', stderr);
 614        }
 615}
 616
 617static const char *status_abbrev(unsigned char sha1[20])
 618{
 619        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 620}
 621
 622static void print_ok_ref_status(struct ref *ref, int porcelain)
 623{
 624        if (ref->deletion)
 625                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 626        else if (is_null_sha1(ref->old_sha1))
 627                print_ref_status('*',
 628                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 629                        "[new branch]"),
 630                        ref, ref->peer_ref, NULL, porcelain);
 631        else {
 632                char quickref[84];
 633                char type;
 634                const char *msg;
 635
 636                strcpy(quickref, status_abbrev(ref->old_sha1));
 637                if (ref->nonfastforward) {
 638                        strcat(quickref, "...");
 639                        type = '+';
 640                        msg = "forced update";
 641                } else {
 642                        strcat(quickref, "..");
 643                        type = ' ';
 644                        msg = NULL;
 645                }
 646                strcat(quickref, status_abbrev(ref->new_sha1));
 647
 648                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 649        }
 650}
 651
 652static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 653{
 654        if (!count)
 655                fprintf(stderr, "To %s\n", dest);
 656
 657        switch(ref->status) {
 658        case REF_STATUS_NONE:
 659                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 660                break;
 661        case REF_STATUS_REJECT_NODELETE:
 662                print_ref_status('!', "[rejected]", ref, NULL,
 663                                                 "remote does not support deleting refs", porcelain);
 664                break;
 665        case REF_STATUS_UPTODATE:
 666                print_ref_status('=', "[up to date]", ref,
 667                                                 ref->peer_ref, NULL, porcelain);
 668                break;
 669        case REF_STATUS_REJECT_NONFASTFORWARD:
 670                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 671                                                 "non-fast forward", porcelain);
 672                break;
 673        case REF_STATUS_REMOTE_REJECT:
 674                print_ref_status('!', "[remote rejected]", ref,
 675                                                 ref->deletion ? NULL : ref->peer_ref,
 676                                                 ref->remote_status, porcelain);
 677                break;
 678        case REF_STATUS_EXPECTING_REPORT:
 679                print_ref_status('!', "[remote failure]", ref,
 680                                                 ref->deletion ? NULL : ref->peer_ref,
 681                                                 "remote failed to report status", porcelain);
 682                break;
 683        case REF_STATUS_OK:
 684                print_ok_ref_status(ref, porcelain);
 685                break;
 686        }
 687
 688        return 1;
 689}
 690
 691static void print_push_status(const char *dest, struct ref *refs,
 692                              int verbose, int porcelain, int * nonfastforward)
 693{
 694        struct ref *ref;
 695        int n = 0;
 696
 697        if (verbose) {
 698                for (ref = refs; ref; ref = ref->next)
 699                        if (ref->status == REF_STATUS_UPTODATE)
 700                                n += print_one_push_status(ref, dest, n, porcelain);
 701        }
 702
 703        for (ref = refs; ref; ref = ref->next)
 704                if (ref->status == REF_STATUS_OK)
 705                        n += print_one_push_status(ref, dest, n, porcelain);
 706
 707        *nonfastforward = 0;
 708        for (ref = refs; ref; ref = ref->next) {
 709                if (ref->status != REF_STATUS_NONE &&
 710                    ref->status != REF_STATUS_UPTODATE &&
 711                    ref->status != REF_STATUS_OK)
 712                        n += print_one_push_status(ref, dest, n, porcelain);
 713                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 714                        *nonfastforward = 1;
 715        }
 716}
 717
 718static void verify_remote_names(int nr_heads, const char **heads)
 719{
 720        int i;
 721
 722        for (i = 0; i < nr_heads; i++) {
 723                const char *local = heads[i];
 724                const char *remote = strrchr(heads[i], ':');
 725
 726                if (*local == '+')
 727                        local++;
 728
 729                /* A matching refspec is okay.  */
 730                if (remote == local && remote[1] == '\0')
 731                        continue;
 732
 733                remote = remote ? (remote + 1) : local;
 734                switch (check_ref_format(remote)) {
 735                case 0: /* ok */
 736                case CHECK_REF_FORMAT_ONELEVEL:
 737                        /* ok but a single level -- that is fine for
 738                         * a match pattern.
 739                         */
 740                case CHECK_REF_FORMAT_WILDCARD:
 741                        /* ok but ends with a pattern-match character */
 742                        continue;
 743                }
 744                die("remote part of refspec is not a valid name in %s",
 745                    heads[i]);
 746        }
 747}
 748
 749static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 750{
 751        struct git_transport_data *data = transport->data;
 752        struct send_pack_args args;
 753        int ret;
 754
 755        if (!data->conn) {
 756                struct ref *tmp_refs;
 757                connect_setup(transport, 1, 0);
 758
 759                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 760                                 NULL);
 761        }
 762
 763        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 764        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 765        args.use_thin_pack = data->thin;
 766        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 767        args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
 768        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 769
 770        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 771                        &data->extra_have);
 772
 773        close(data->fd[1]);
 774        close(data->fd[0]);
 775        ret |= finish_connect(data->conn);
 776        data->conn = NULL;
 777
 778        return ret;
 779}
 780
 781static int disconnect_git(struct transport *transport)
 782{
 783        struct git_transport_data *data = transport->data;
 784        if (data->conn) {
 785                packet_flush(data->fd[1]);
 786                close(data->fd[0]);
 787                close(data->fd[1]);
 788                finish_connect(data->conn);
 789        }
 790
 791        free(data);
 792        return 0;
 793}
 794
 795static int is_local(const char *url)
 796{
 797        const char *colon = strchr(url, ':');
 798        const char *slash = strchr(url, '/');
 799        return !colon || (slash && slash < colon) ||
 800                has_dos_drive_prefix(url);
 801}
 802
 803static int is_file(const char *url)
 804{
 805        struct stat buf;
 806        if (stat(url, &buf))
 807                return 0;
 808        return S_ISREG(buf.st_mode);
 809}
 810
 811struct transport *transport_get(struct remote *remote, const char *url)
 812{
 813        struct transport *ret = xcalloc(1, sizeof(*ret));
 814
 815        ret->remote = remote;
 816        ret->url = url;
 817
 818        if (!prefixcmp(url, "rsync:")) {
 819                ret->get_refs_list = get_refs_via_rsync;
 820                ret->fetch = fetch_objs_via_rsync;
 821                ret->push = rsync_transport_push;
 822
 823        } else if (!prefixcmp(url, "http://")
 824                || !prefixcmp(url, "https://")
 825                || !prefixcmp(url, "ftp://")) {
 826                transport_helper_init(ret, "curl");
 827#ifdef NO_CURL
 828                error("git was compiled without libcurl support.");
 829#else
 830                ret->push = curl_transport_push;
 831#endif
 832
 833        } else if (is_local(url) && is_file(url)) {
 834                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 835                ret->data = data;
 836                ret->get_refs_list = get_refs_from_bundle;
 837                ret->fetch = fetch_refs_from_bundle;
 838                ret->disconnect = close_bundle;
 839
 840        } else {
 841                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 842                ret->data = data;
 843                ret->set_option = set_git_option;
 844                ret->get_refs_list = get_refs_via_connect;
 845                ret->fetch = fetch_refs_via_pack;
 846                ret->push_refs = git_transport_push;
 847                ret->disconnect = disconnect_git;
 848
 849                data->thin = 1;
 850                data->conn = NULL;
 851                data->uploadpack = "git-upload-pack";
 852                if (remote && remote->uploadpack)
 853                        data->uploadpack = remote->uploadpack;
 854                data->receivepack = "git-receive-pack";
 855                if (remote && remote->receivepack)
 856                        data->receivepack = remote->receivepack;
 857        }
 858
 859        return ret;
 860}
 861
 862int transport_set_option(struct transport *transport,
 863                         const char *name, const char *value)
 864{
 865        if (transport->set_option)
 866                return transport->set_option(transport, name, value);
 867        return 1;
 868}
 869
 870int transport_push(struct transport *transport,
 871                   int refspec_nr, const char **refspec, int flags,
 872                   int *nonfastforward)
 873{
 874        *nonfastforward = 0;
 875        verify_remote_names(refspec_nr, refspec);
 876
 877        if (transport->push)
 878                return transport->push(transport, refspec_nr, refspec, flags);
 879        if (transport->push_refs) {
 880                struct ref *remote_refs =
 881                        transport->get_refs_list(transport, 1);
 882                struct ref *local_refs = get_local_heads();
 883                int match_flags = MATCH_REFS_NONE;
 884                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
 885                int quiet = flags & TRANSPORT_PUSH_QUIET;
 886                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 887                int ret;
 888
 889                if (flags & TRANSPORT_PUSH_ALL)
 890                        match_flags |= MATCH_REFS_ALL;
 891                if (flags & TRANSPORT_PUSH_MIRROR)
 892                        match_flags |= MATCH_REFS_MIRROR;
 893
 894                if (match_refs(local_refs, &remote_refs,
 895                               refspec_nr, refspec, match_flags)) {
 896                        return -1;
 897                }
 898
 899                ret = transport->push_refs(transport, remote_refs, flags);
 900
 901                if (!quiet || push_had_errors(remote_refs))
 902                        print_push_status(transport->url, remote_refs,
 903                                        verbose | porcelain, porcelain,
 904                                        nonfastforward);
 905
 906                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 907                        struct ref *ref;
 908                        for (ref = remote_refs; ref; ref = ref->next)
 909                                update_tracking_ref(transport->remote, ref, verbose);
 910                }
 911
 912                if (!quiet && !ret && !refs_pushed(remote_refs))
 913                        fprintf(stderr, "Everything up-to-date\n");
 914                return ret;
 915        }
 916        return 1;
 917}
 918
 919const struct ref *transport_get_remote_refs(struct transport *transport)
 920{
 921        if (!transport->remote_refs)
 922                transport->remote_refs = transport->get_refs_list(transport, 0);
 923        return transport->remote_refs;
 924}
 925
 926int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 927{
 928        int rc;
 929        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 930        const struct ref **heads = NULL;
 931        const struct ref *rm;
 932
 933        for (rm = refs; rm; rm = rm->next) {
 934                nr_refs++;
 935                if (rm->peer_ref &&
 936                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
 937                        continue;
 938                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 939                heads[nr_heads++] = rm;
 940        }
 941
 942        if (!nr_heads) {
 943                /*
 944                 * When deepening of a shallow repository is requested,
 945                 * then local and remote refs are likely to still be equal.
 946                 * Just feed them all to the fetch method in that case.
 947                 * This condition shouldn't be met in a non-deepening fetch
 948                 * (see builtin-fetch.c:quickfetch()).
 949                 */
 950                heads = xmalloc(nr_refs * sizeof(*heads));
 951                for (rm = refs; rm; rm = rm->next)
 952                        heads[nr_heads++] = rm;
 953        }
 954
 955        rc = transport->fetch(transport, nr_heads, heads);
 956        free(heads);
 957        return rc;
 958}
 959
 960void transport_unlock_pack(struct transport *transport)
 961{
 962        if (transport->pack_lockfile) {
 963                unlink_or_warn(transport->pack_lockfile);
 964                free(transport->pack_lockfile);
 965                transport->pack_lockfile = NULL;
 966        }
 967}
 968
 969int transport_disconnect(struct transport *transport)
 970{
 971        int ret = 0;
 972        if (transport->disconnect)
 973                ret = transport->disconnect(transport);
 974        free(transport);
 975        return ret;
 976}
 977
 978/*
 979 * Strip username (and password) from an url and return
 980 * it in a newly allocated string.
 981 */
 982char *transport_anonymize_url(const char *url)
 983{
 984        char *anon_url, *scheme_prefix, *anon_part;
 985        size_t anon_len, prefix_len = 0;
 986
 987        anon_part = strchr(url, '@');
 988        if (is_local(url) || !anon_part)
 989                goto literal_copy;
 990
 991        anon_len = strlen(++anon_part);
 992        scheme_prefix = strstr(url, "://");
 993        if (!scheme_prefix) {
 994                if (!strchr(anon_part, ':'))
 995                        /* cannot be "me@there:/path/name" */
 996                        goto literal_copy;
 997        } else {
 998                const char *cp;
 999                /* make sure scheme is reasonable */
1000                for (cp = url; cp < scheme_prefix; cp++) {
1001                        switch (*cp) {
1002                                /* RFC 1738 2.1 */
1003                        case '+': case '.': case '-':
1004                                break; /* ok */
1005                        default:
1006                                if (isalnum(*cp))
1007                                        break;
1008                                /* it isn't */
1009                                goto literal_copy;
1010                        }
1011                }
1012                /* @ past the first slash does not count */
1013                cp = strchr(scheme_prefix + 3, '/');
1014                if (cp && cp < anon_part)
1015                        goto literal_copy;
1016                prefix_len = scheme_prefix - url + 3;
1017        }
1018        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1019        memcpy(anon_url, url, prefix_len);
1020        memcpy(anon_url + prefix_len, anon_part, anon_len);
1021        return anon_url;
1022literal_copy:
1023        return xstrdup(url);
1024}