dff929ec01fdb8a51e74cd7c2036fd998208b513
   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 "remote.h"
   7#include "connect.h"
   8#include "send-pack.h"
   9#include "walker.h"
  10#include "bundle.h"
  11#include "dir.h"
  12#include "refs.h"
  13#include "branch.h"
  14#include "url.h"
  15#include "submodule.h"
  16#include "string-list.h"
  17#include "sha1-array.h"
  18#include "sigchain.h"
  19
  20static void set_upstreams(struct transport *transport, struct ref *refs,
  21        int pretend)
  22{
  23        struct ref *ref;
  24        for (ref = refs; ref; ref = ref->next) {
  25                const char *localname;
  26                const char *tmp;
  27                const char *remotename;
  28                unsigned char sha[20];
  29                int flag = 0;
  30                /*
  31                 * Check suitability for tracking. Must be successful /
  32                 * already up-to-date ref create/modify (not delete).
  33                 */
  34                if (ref->status != REF_STATUS_OK &&
  35                        ref->status != REF_STATUS_UPTODATE)
  36                        continue;
  37                if (!ref->peer_ref)
  38                        continue;
  39                if (is_null_oid(&ref->new_oid))
  40                        continue;
  41
  42                /* Follow symbolic refs (mainly for HEAD). */
  43                localname = ref->peer_ref->name;
  44                remotename = ref->name;
  45                tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
  46                                         sha, &flag);
  47                if (tmp && flag & REF_ISSYMREF &&
  48                        starts_with(tmp, "refs/heads/"))
  49                        localname = tmp;
  50
  51                /* Both source and destination must be local branches. */
  52                if (!localname || !starts_with(localname, "refs/heads/"))
  53                        continue;
  54                if (!remotename || !starts_with(remotename, "refs/heads/"))
  55                        continue;
  56
  57                if (!pretend)
  58                        install_branch_config(BRANCH_CONFIG_VERBOSE,
  59                                localname + 11, transport->remote->name,
  60                                remotename);
  61                else
  62                        printf("Would set upstream of '%s' to '%s' of '%s'\n",
  63                                localname + 11, remotename + 11,
  64                                transport->remote->name);
  65        }
  66}
  67
  68struct bundle_transport_data {
  69        int fd;
  70        struct bundle_header header;
  71};
  72
  73static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
  74{
  75        struct bundle_transport_data *data = transport->data;
  76        struct ref *result = NULL;
  77        int i;
  78
  79        if (for_push)
  80                return NULL;
  81
  82        if (data->fd > 0)
  83                close(data->fd);
  84        data->fd = read_bundle_header(transport->url, &data->header);
  85        if (data->fd < 0)
  86                die ("Could not read bundle '%s'.", transport->url);
  87        for (i = 0; i < data->header.references.nr; i++) {
  88                struct ref_list_entry *e = data->header.references.list + i;
  89                struct ref *ref = alloc_ref(e->name);
  90                hashcpy(ref->old_oid.hash, e->sha1);
  91                ref->next = result;
  92                result = ref;
  93        }
  94        return result;
  95}
  96
  97static int fetch_refs_from_bundle(struct transport *transport,
  98                               int nr_heads, struct ref **to_fetch)
  99{
 100        struct bundle_transport_data *data = transport->data;
 101        return unbundle(&data->header, data->fd,
 102                        transport->progress ? BUNDLE_VERBOSE : 0);
 103}
 104
 105static int close_bundle(struct transport *transport)
 106{
 107        struct bundle_transport_data *data = transport->data;
 108        if (data->fd > 0)
 109                close(data->fd);
 110        free(data);
 111        return 0;
 112}
 113
 114struct git_transport_data {
 115        struct git_transport_options options;
 116        struct child_process *conn;
 117        int fd[2];
 118        unsigned got_remote_heads : 1;
 119        struct sha1_array extra_have;
 120        struct sha1_array shallow;
 121};
 122
 123static int set_git_option(struct git_transport_options *opts,
 124                          const char *name, const char *value)
 125{
 126        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 127                opts->uploadpack = value;
 128                return 0;
 129        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 130                opts->receivepack = value;
 131                return 0;
 132        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 133                opts->thin = !!value;
 134                return 0;
 135        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 136                opts->followtags = !!value;
 137                return 0;
 138        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 139                opts->keep = !!value;
 140                return 0;
 141        } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 142                opts->update_shallow = !!value;
 143                return 0;
 144        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 145                if (!value)
 146                        opts->depth = 0;
 147                else {
 148                        char *end;
 149                        opts->depth = strtol(value, &end, 0);
 150                        if (*end)
 151                                die("transport: invalid depth option '%s'", value);
 152                }
 153                return 0;
 154        }
 155        return 1;
 156}
 157
 158static int connect_setup(struct transport *transport, int for_push)
 159{
 160        struct git_transport_data *data = transport->data;
 161        int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 162
 163        if (data->conn)
 164                return 0;
 165
 166        switch (transport->family) {
 167        case TRANSPORT_FAMILY_ALL: break;
 168        case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 169        case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 170        }
 171
 172        data->conn = git_connect(data->fd, transport->url,
 173                                 for_push ? data->options.receivepack :
 174                                 data->options.uploadpack,
 175                                 flags);
 176
 177        return 0;
 178}
 179
 180static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 181{
 182        struct git_transport_data *data = transport->data;
 183        struct ref *refs;
 184
 185        connect_setup(transport, for_push);
 186        get_remote_heads(data->fd[0], NULL, 0, &refs,
 187                         for_push ? REF_NORMAL : 0,
 188                         &data->extra_have,
 189                         &data->shallow);
 190        data->got_remote_heads = 1;
 191
 192        return refs;
 193}
 194
 195static int fetch_refs_via_pack(struct transport *transport,
 196                               int nr_heads, struct ref **to_fetch)
 197{
 198        struct git_transport_data *data = transport->data;
 199        struct ref *refs;
 200        char *dest = xstrdup(transport->url);
 201        struct fetch_pack_args args;
 202        struct ref *refs_tmp = NULL;
 203
 204        memset(&args, 0, sizeof(args));
 205        args.uploadpack = data->options.uploadpack;
 206        args.keep_pack = data->options.keep;
 207        args.lock_pack = 1;
 208        args.use_thin_pack = data->options.thin;
 209        args.include_tag = data->options.followtags;
 210        args.verbose = (transport->verbose > 1);
 211        args.quiet = (transport->verbose < 0);
 212        args.no_progress = !transport->progress;
 213        args.depth = data->options.depth;
 214        args.check_self_contained_and_connected =
 215                data->options.check_self_contained_and_connected;
 216        args.cloning = transport->cloning;
 217        args.update_shallow = data->options.update_shallow;
 218
 219        if (!data->got_remote_heads) {
 220                connect_setup(transport, 0);
 221                get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 222                                 NULL, &data->shallow);
 223                data->got_remote_heads = 1;
 224        }
 225
 226        refs = fetch_pack(&args, data->fd, data->conn,
 227                          refs_tmp ? refs_tmp : transport->remote_refs,
 228                          dest, to_fetch, nr_heads, &data->shallow,
 229                          &transport->pack_lockfile);
 230        close(data->fd[0]);
 231        close(data->fd[1]);
 232        if (finish_connect(data->conn)) {
 233                free_refs(refs);
 234                refs = NULL;
 235        }
 236        data->conn = NULL;
 237        data->got_remote_heads = 0;
 238        data->options.self_contained_and_connected =
 239                args.self_contained_and_connected;
 240
 241        free_refs(refs_tmp);
 242        free_refs(refs);
 243        free(dest);
 244        return (refs ? 0 : -1);
 245}
 246
 247static int push_had_errors(struct ref *ref)
 248{
 249        for (; ref; ref = ref->next) {
 250                switch (ref->status) {
 251                case REF_STATUS_NONE:
 252                case REF_STATUS_UPTODATE:
 253                case REF_STATUS_OK:
 254                        break;
 255                default:
 256                        return 1;
 257                }
 258        }
 259        return 0;
 260}
 261
 262int transport_refs_pushed(struct ref *ref)
 263{
 264        for (; ref; ref = ref->next) {
 265                switch(ref->status) {
 266                case REF_STATUS_NONE:
 267                case REF_STATUS_UPTODATE:
 268                        break;
 269                default:
 270                        return 1;
 271                }
 272        }
 273        return 0;
 274}
 275
 276void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 277{
 278        struct refspec rs;
 279
 280        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 281                return;
 282
 283        rs.src = ref->name;
 284        rs.dst = NULL;
 285
 286        if (!remote_find_tracking(remote, &rs)) {
 287                if (verbose)
 288                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 289                if (ref->deletion) {
 290                        delete_ref(rs.dst, NULL, 0);
 291                } else
 292                        update_ref("update by push", rs.dst,
 293                                        ref->new_oid.hash, NULL, 0, 0);
 294                free(rs.dst);
 295        }
 296}
 297
 298static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 299{
 300        if (porcelain) {
 301                if (from)
 302                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 303                else
 304                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 305                if (msg)
 306                        fprintf(stdout, "%s (%s)\n", summary, msg);
 307                else
 308                        fprintf(stdout, "%s\n", summary);
 309        } else {
 310                fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 311                if (from)
 312                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 313                else
 314                        fputs(prettify_refname(to->name), stderr);
 315                if (msg) {
 316                        fputs(" (", stderr);
 317                        fputs(msg, stderr);
 318                        fputc(')', stderr);
 319                }
 320                fputc('\n', stderr);
 321        }
 322}
 323
 324static void print_ok_ref_status(struct ref *ref, int porcelain)
 325{
 326        if (ref->deletion)
 327                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 328        else if (is_null_oid(&ref->old_oid))
 329                print_ref_status('*',
 330                        (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 331                        "[new branch]"),
 332                        ref, ref->peer_ref, NULL, porcelain);
 333        else {
 334                struct strbuf quickref = STRBUF_INIT;
 335                char type;
 336                const char *msg;
 337
 338                strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
 339                                         DEFAULT_ABBREV);
 340                if (ref->forced_update) {
 341                        strbuf_addstr(&quickref, "...");
 342                        type = '+';
 343                        msg = "forced update";
 344                } else {
 345                        strbuf_addstr(&quickref, "..");
 346                        type = ' ';
 347                        msg = NULL;
 348                }
 349                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
 350                                         DEFAULT_ABBREV);
 351
 352                print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg, porcelain);
 353                strbuf_release(&quickref);
 354        }
 355}
 356
 357static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 358{
 359        if (!count) {
 360                char *url = transport_anonymize_url(dest);
 361                fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 362                free(url);
 363        }
 364
 365        switch(ref->status) {
 366        case REF_STATUS_NONE:
 367                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 368                break;
 369        case REF_STATUS_REJECT_NODELETE:
 370                print_ref_status('!', "[rejected]", ref, NULL,
 371                                                 "remote does not support deleting refs", porcelain);
 372                break;
 373        case REF_STATUS_UPTODATE:
 374                print_ref_status('=', "[up to date]", ref,
 375                                                 ref->peer_ref, NULL, porcelain);
 376                break;
 377        case REF_STATUS_REJECT_NONFASTFORWARD:
 378                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 379                                                 "non-fast-forward", porcelain);
 380                break;
 381        case REF_STATUS_REJECT_ALREADY_EXISTS:
 382                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 383                                                 "already exists", porcelain);
 384                break;
 385        case REF_STATUS_REJECT_FETCH_FIRST:
 386                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 387                                                 "fetch first", porcelain);
 388                break;
 389        case REF_STATUS_REJECT_NEEDS_FORCE:
 390                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 391                                                 "needs force", porcelain);
 392                break;
 393        case REF_STATUS_REJECT_STALE:
 394                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 395                                                 "stale info", porcelain);
 396                break;
 397        case REF_STATUS_REJECT_SHALLOW:
 398                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 399                                                 "new shallow roots not allowed", porcelain);
 400                break;
 401        case REF_STATUS_REMOTE_REJECT:
 402                print_ref_status('!', "[remote rejected]", ref,
 403                                                 ref->deletion ? NULL : ref->peer_ref,
 404                                                 ref->remote_status, porcelain);
 405                break;
 406        case REF_STATUS_EXPECTING_REPORT:
 407                print_ref_status('!', "[remote failure]", ref,
 408                                                 ref->deletion ? NULL : ref->peer_ref,
 409                                                 "remote failed to report status", porcelain);
 410                break;
 411        case REF_STATUS_ATOMIC_PUSH_FAILED:
 412                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 413                                                 "atomic push failed", porcelain);
 414                break;
 415        case REF_STATUS_OK:
 416                print_ok_ref_status(ref, porcelain);
 417                break;
 418        }
 419
 420        return 1;
 421}
 422
 423void transport_print_push_status(const char *dest, struct ref *refs,
 424                                  int verbose, int porcelain, unsigned int *reject_reasons)
 425{
 426        struct ref *ref;
 427        int n = 0;
 428        unsigned char head_sha1[20];
 429        char *head;
 430
 431        head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
 432
 433        if (verbose) {
 434                for (ref = refs; ref; ref = ref->next)
 435                        if (ref->status == REF_STATUS_UPTODATE)
 436                                n += print_one_push_status(ref, dest, n, porcelain);
 437        }
 438
 439        for (ref = refs; ref; ref = ref->next)
 440                if (ref->status == REF_STATUS_OK)
 441                        n += print_one_push_status(ref, dest, n, porcelain);
 442
 443        *reject_reasons = 0;
 444        for (ref = refs; ref; ref = ref->next) {
 445                if (ref->status != REF_STATUS_NONE &&
 446                    ref->status != REF_STATUS_UPTODATE &&
 447                    ref->status != REF_STATUS_OK)
 448                        n += print_one_push_status(ref, dest, n, porcelain);
 449                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 450                        if (head != NULL && !strcmp(head, ref->name))
 451                                *reject_reasons |= REJECT_NON_FF_HEAD;
 452                        else
 453                                *reject_reasons |= REJECT_NON_FF_OTHER;
 454                } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 455                        *reject_reasons |= REJECT_ALREADY_EXISTS;
 456                } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 457                        *reject_reasons |= REJECT_FETCH_FIRST;
 458                } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 459                        *reject_reasons |= REJECT_NEEDS_FORCE;
 460                }
 461        }
 462        free(head);
 463}
 464
 465void transport_verify_remote_names(int nr_heads, const char **heads)
 466{
 467        int i;
 468
 469        for (i = 0; i < nr_heads; i++) {
 470                const char *local = heads[i];
 471                const char *remote = strrchr(heads[i], ':');
 472
 473                if (*local == '+')
 474                        local++;
 475
 476                /* A matching refspec is okay.  */
 477                if (remote == local && remote[1] == '\0')
 478                        continue;
 479
 480                remote = remote ? (remote + 1) : local;
 481                if (check_refname_format(remote,
 482                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 483                        die("remote part of refspec is not a valid name in %s",
 484                                heads[i]);
 485        }
 486}
 487
 488static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 489{
 490        struct git_transport_data *data = transport->data;
 491        struct send_pack_args args;
 492        int ret;
 493
 494        if (!data->got_remote_heads) {
 495                struct ref *tmp_refs;
 496                connect_setup(transport, 1);
 497
 498                get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 499                                 NULL, &data->shallow);
 500                data->got_remote_heads = 1;
 501        }
 502
 503        memset(&args, 0, sizeof(args));
 504        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 505        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 506        args.use_thin_pack = data->options.thin;
 507        args.verbose = (transport->verbose > 0);
 508        args.quiet = (transport->verbose < 0);
 509        args.progress = transport->progress;
 510        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 511        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 512        args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 513        args.url = transport->url;
 514
 515        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 516                args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 517        else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 518                args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 519        else
 520                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 521
 522        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 523                        &data->extra_have);
 524
 525        close(data->fd[1]);
 526        close(data->fd[0]);
 527        ret |= finish_connect(data->conn);
 528        data->conn = NULL;
 529        data->got_remote_heads = 0;
 530
 531        return ret;
 532}
 533
 534static int connect_git(struct transport *transport, const char *name,
 535                       const char *executable, int fd[2])
 536{
 537        struct git_transport_data *data = transport->data;
 538        data->conn = git_connect(data->fd, transport->url,
 539                                 executable, 0);
 540        fd[0] = data->fd[0];
 541        fd[1] = data->fd[1];
 542        return 0;
 543}
 544
 545static int disconnect_git(struct transport *transport)
 546{
 547        struct git_transport_data *data = transport->data;
 548        if (data->conn) {
 549                if (data->got_remote_heads)
 550                        packet_flush(data->fd[1]);
 551                close(data->fd[0]);
 552                close(data->fd[1]);
 553                finish_connect(data->conn);
 554        }
 555
 556        free(data);
 557        return 0;
 558}
 559
 560void transport_take_over(struct transport *transport,
 561                         struct child_process *child)
 562{
 563        struct git_transport_data *data;
 564
 565        if (!transport->smart_options)
 566                die("Bug detected: Taking over transport requires non-NULL "
 567                    "smart_options field.");
 568
 569        data = xcalloc(1, sizeof(*data));
 570        data->options = *transport->smart_options;
 571        data->conn = child;
 572        data->fd[0] = data->conn->out;
 573        data->fd[1] = data->conn->in;
 574        data->got_remote_heads = 0;
 575        transport->data = data;
 576
 577        transport->set_option = NULL;
 578        transport->get_refs_list = get_refs_via_connect;
 579        transport->fetch = fetch_refs_via_pack;
 580        transport->push = NULL;
 581        transport->push_refs = git_transport_push;
 582        transport->disconnect = disconnect_git;
 583        transport->smart_options = &(data->options);
 584
 585        transport->cannot_reuse = 1;
 586}
 587
 588static int is_file(const char *url)
 589{
 590        struct stat buf;
 591        if (stat(url, &buf))
 592                return 0;
 593        return S_ISREG(buf.st_mode);
 594}
 595
 596static int external_specification_len(const char *url)
 597{
 598        return strchr(url, ':') - url;
 599}
 600
 601static const struct string_list *protocol_whitelist(void)
 602{
 603        static int enabled = -1;
 604        static struct string_list allowed = STRING_LIST_INIT_DUP;
 605
 606        if (enabled < 0) {
 607                const char *v = getenv("GIT_ALLOW_PROTOCOL");
 608                if (v) {
 609                        string_list_split(&allowed, v, ':', -1);
 610                        string_list_sort(&allowed);
 611                        enabled = 1;
 612                } else {
 613                        enabled = 0;
 614                }
 615        }
 616
 617        return enabled ? &allowed : NULL;
 618}
 619
 620int is_transport_allowed(const char *type)
 621{
 622        const struct string_list *allowed = protocol_whitelist();
 623        return !allowed || string_list_has_string(allowed, type);
 624}
 625
 626void transport_check_allowed(const char *type)
 627{
 628        if (!is_transport_allowed(type))
 629                die("transport '%s' not allowed", type);
 630}
 631
 632struct transport *transport_get(struct remote *remote, const char *url)
 633{
 634        const char *helper;
 635        struct transport *ret = xcalloc(1, sizeof(*ret));
 636
 637        ret->progress = isatty(2);
 638
 639        if (!remote)
 640                die("No remote provided to transport_get()");
 641
 642        ret->got_remote_refs = 0;
 643        ret->remote = remote;
 644        helper = remote->foreign_vcs;
 645
 646        if (!url && remote->url)
 647                url = remote->url[0];
 648        ret->url = url;
 649
 650        /* maybe it is a foreign URL? */
 651        if (url) {
 652                const char *p = url;
 653
 654                while (is_urlschemechar(p == url, *p))
 655                        p++;
 656                if (starts_with(p, "::"))
 657                        helper = xstrndup(url, p - url);
 658        }
 659
 660        if (helper) {
 661                transport_helper_init(ret, helper);
 662        } else if (starts_with(url, "rsync:")) {
 663                die("git-over-rsync is no longer supported");
 664        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 665                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 666                transport_check_allowed("file");
 667                ret->data = data;
 668                ret->get_refs_list = get_refs_from_bundle;
 669                ret->fetch = fetch_refs_from_bundle;
 670                ret->disconnect = close_bundle;
 671                ret->smart_options = NULL;
 672        } else if (!is_url(url)
 673                || starts_with(url, "file://")
 674                || starts_with(url, "git://")
 675                || starts_with(url, "ssh://")
 676                || starts_with(url, "git+ssh://") /* deprecated - do not use */
 677                || starts_with(url, "ssh+git://") /* deprecated - do not use */
 678                ) {
 679                /*
 680                 * These are builtin smart transports; "allowed" transports
 681                 * will be checked individually in git_connect.
 682                 */
 683                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 684                ret->data = data;
 685                ret->set_option = NULL;
 686                ret->get_refs_list = get_refs_via_connect;
 687                ret->fetch = fetch_refs_via_pack;
 688                ret->push_refs = git_transport_push;
 689                ret->connect = connect_git;
 690                ret->disconnect = disconnect_git;
 691                ret->smart_options = &(data->options);
 692
 693                data->conn = NULL;
 694                data->got_remote_heads = 0;
 695        } else {
 696                /* Unknown protocol in URL. Pass to external handler. */
 697                int len = external_specification_len(url);
 698                char *handler = xmemdupz(url, len);
 699                transport_helper_init(ret, handler);
 700        }
 701
 702        if (ret->smart_options) {
 703                ret->smart_options->thin = 1;
 704                ret->smart_options->uploadpack = "git-upload-pack";
 705                if (remote->uploadpack)
 706                        ret->smart_options->uploadpack = remote->uploadpack;
 707                ret->smart_options->receivepack = "git-receive-pack";
 708                if (remote->receivepack)
 709                        ret->smart_options->receivepack = remote->receivepack;
 710        }
 711
 712        return ret;
 713}
 714
 715int transport_set_option(struct transport *transport,
 716                         const char *name, const char *value)
 717{
 718        int git_reports = 1, protocol_reports = 1;
 719
 720        if (transport->smart_options)
 721                git_reports = set_git_option(transport->smart_options,
 722                                             name, value);
 723
 724        if (transport->set_option)
 725                protocol_reports = transport->set_option(transport, name,
 726                                                        value);
 727
 728        /* If either report is 0, report 0 (success). */
 729        if (!git_reports || !protocol_reports)
 730                return 0;
 731        /* If either reports -1 (invalid value), report -1. */
 732        if ((git_reports == -1) || (protocol_reports == -1))
 733                return -1;
 734        /* Otherwise if both report unknown, report unknown. */
 735        return 1;
 736}
 737
 738void transport_set_verbosity(struct transport *transport, int verbosity,
 739        int force_progress)
 740{
 741        if (verbosity >= 1)
 742                transport->verbose = verbosity <= 3 ? verbosity : 3;
 743        if (verbosity < 0)
 744                transport->verbose = -1;
 745
 746        /**
 747         * Rules used to determine whether to report progress (processing aborts
 748         * when a rule is satisfied):
 749         *
 750         *   . Report progress, if force_progress is 1 (ie. --progress).
 751         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 752         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 753         *   . Report progress if isatty(2) is 1.
 754         **/
 755        if (force_progress >= 0)
 756                transport->progress = !!force_progress;
 757        else
 758                transport->progress = verbosity >= 0 && isatty(2);
 759}
 760
 761static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 762{
 763        int i;
 764
 765        fprintf(stderr, "The following submodule paths contain changes that can\n"
 766                        "not be found on any remote:\n");
 767        for (i = 0; i < needs_pushing->nr; i++)
 768                printf("  %s\n", needs_pushing->items[i].string);
 769        fprintf(stderr, "\nPlease try\n\n"
 770                        "       git push --recurse-submodules=on-demand\n\n"
 771                        "or cd to the path and use\n\n"
 772                        "       git push\n\n"
 773                        "to push them to a remote.\n\n");
 774
 775        string_list_clear(needs_pushing, 0);
 776
 777        die("Aborting.");
 778}
 779
 780static int run_pre_push_hook(struct transport *transport,
 781                             struct ref *remote_refs)
 782{
 783        int ret = 0, x;
 784        struct ref *r;
 785        struct child_process proc = CHILD_PROCESS_INIT;
 786        struct strbuf buf;
 787        const char *argv[4];
 788
 789        if (!(argv[0] = find_hook("pre-push")))
 790                return 0;
 791
 792        argv[1] = transport->remote->name;
 793        argv[2] = transport->url;
 794        argv[3] = NULL;
 795
 796        proc.argv = argv;
 797        proc.in = -1;
 798
 799        if (start_command(&proc)) {
 800                finish_command(&proc);
 801                return -1;
 802        }
 803
 804        sigchain_push(SIGPIPE, SIG_IGN);
 805
 806        strbuf_init(&buf, 256);
 807
 808        for (r = remote_refs; r; r = r->next) {
 809                if (!r->peer_ref) continue;
 810                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 811                if (r->status == REF_STATUS_REJECT_STALE) continue;
 812                if (r->status == REF_STATUS_UPTODATE) continue;
 813
 814                strbuf_reset(&buf);
 815                strbuf_addf( &buf, "%s %s %s %s\n",
 816                         r->peer_ref->name, oid_to_hex(&r->new_oid),
 817                         r->name, oid_to_hex(&r->old_oid));
 818
 819                if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 820                        /* We do not mind if a hook does not read all refs. */
 821                        if (errno != EPIPE)
 822                                ret = -1;
 823                        break;
 824                }
 825        }
 826
 827        strbuf_release(&buf);
 828
 829        x = close(proc.in);
 830        if (!ret)
 831                ret = x;
 832
 833        sigchain_pop(SIGPIPE);
 834
 835        x = finish_command(&proc);
 836        if (!ret)
 837                ret = x;
 838
 839        return ret;
 840}
 841
 842int transport_push(struct transport *transport,
 843                   int refspec_nr, const char **refspec, int flags,
 844                   unsigned int *reject_reasons)
 845{
 846        *reject_reasons = 0;
 847        transport_verify_remote_names(refspec_nr, refspec);
 848
 849        if (transport->push) {
 850                /* Maybe FIXME. But no important transport uses this case. */
 851                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 852                        die("This transport does not support using --set-upstream");
 853
 854                return transport->push(transport, refspec_nr, refspec, flags);
 855        } else if (transport->push_refs) {
 856                struct ref *remote_refs;
 857                struct ref *local_refs = get_local_heads();
 858                int match_flags = MATCH_REFS_NONE;
 859                int verbose = (transport->verbose > 0);
 860                int quiet = (transport->verbose < 0);
 861                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 862                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 863                int push_ret, ret, err;
 864
 865                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 866                        return -1;
 867
 868                remote_refs = transport->get_refs_list(transport, 1);
 869
 870                if (flags & TRANSPORT_PUSH_ALL)
 871                        match_flags |= MATCH_REFS_ALL;
 872                if (flags & TRANSPORT_PUSH_MIRROR)
 873                        match_flags |= MATCH_REFS_MIRROR;
 874                if (flags & TRANSPORT_PUSH_PRUNE)
 875                        match_flags |= MATCH_REFS_PRUNE;
 876                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
 877                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
 878
 879                if (match_push_refs(local_refs, &remote_refs,
 880                                    refspec_nr, refspec, match_flags)) {
 881                        return -1;
 882                }
 883
 884                if (transport->smart_options &&
 885                    transport->smart_options->cas &&
 886                    !is_empty_cas(transport->smart_options->cas))
 887                        apply_push_cas(transport->smart_options->cas,
 888                                       transport->remote, remote_refs);
 889
 890                set_ref_status_for_push(remote_refs,
 891                        flags & TRANSPORT_PUSH_MIRROR,
 892                        flags & TRANSPORT_PUSH_FORCE);
 893
 894                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
 895                        if (run_pre_push_hook(transport, remote_refs))
 896                                return -1;
 897
 898                if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
 899                        struct ref *ref = remote_refs;
 900                        for (; ref; ref = ref->next)
 901                                if (!is_null_oid(&ref->new_oid) &&
 902                                    !push_unpushed_submodules(ref->new_oid.hash,
 903                                            transport->remote->name))
 904                                    die ("Failed to push all needed submodules!");
 905                }
 906
 907                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
 908                              TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
 909                        struct ref *ref = remote_refs;
 910                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 911
 912                        for (; ref; ref = ref->next)
 913                                if (!is_null_oid(&ref->new_oid) &&
 914                                    find_unpushed_submodules(ref->new_oid.hash,
 915                                            transport->remote->name, &needs_pushing))
 916                                        die_with_unpushed_submodules(&needs_pushing);
 917                }
 918
 919                push_ret = transport->push_refs(transport, remote_refs, flags);
 920                err = push_had_errors(remote_refs);
 921                ret = push_ret | err;
 922
 923                if (!quiet || err)
 924                        transport_print_push_status(transport->url, remote_refs,
 925                                        verbose | porcelain, porcelain,
 926                                        reject_reasons);
 927
 928                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 929                        set_upstreams(transport, remote_refs, pretend);
 930
 931                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 932                        struct ref *ref;
 933                        for (ref = remote_refs; ref; ref = ref->next)
 934                                transport_update_tracking_ref(transport->remote, ref, verbose);
 935                }
 936
 937                if (porcelain && !push_ret)
 938                        puts("Done");
 939                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
 940                        fprintf(stderr, "Everything up-to-date\n");
 941
 942                return ret;
 943        }
 944        return 1;
 945}
 946
 947const struct ref *transport_get_remote_refs(struct transport *transport)
 948{
 949        if (!transport->got_remote_refs) {
 950                transport->remote_refs = transport->get_refs_list(transport, 0);
 951                transport->got_remote_refs = 1;
 952        }
 953
 954        return transport->remote_refs;
 955}
 956
 957int transport_fetch_refs(struct transport *transport, struct ref *refs)
 958{
 959        int rc;
 960        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 961        struct ref **heads = NULL;
 962        struct ref *rm;
 963
 964        for (rm = refs; rm; rm = rm->next) {
 965                nr_refs++;
 966                if (rm->peer_ref &&
 967                    !is_null_oid(&rm->old_oid) &&
 968                    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
 969                        continue;
 970                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 971                heads[nr_heads++] = rm;
 972        }
 973
 974        if (!nr_heads) {
 975                /*
 976                 * When deepening of a shallow repository is requested,
 977                 * then local and remote refs are likely to still be equal.
 978                 * Just feed them all to the fetch method in that case.
 979                 * This condition shouldn't be met in a non-deepening fetch
 980                 * (see builtin/fetch.c:quickfetch()).
 981                 */
 982                ALLOC_ARRAY(heads, nr_refs);
 983                for (rm = refs; rm; rm = rm->next)
 984                        heads[nr_heads++] = rm;
 985        }
 986
 987        rc = transport->fetch(transport, nr_heads, heads);
 988
 989        free(heads);
 990        return rc;
 991}
 992
 993void transport_unlock_pack(struct transport *transport)
 994{
 995        if (transport->pack_lockfile) {
 996                unlink_or_warn(transport->pack_lockfile);
 997                free(transport->pack_lockfile);
 998                transport->pack_lockfile = NULL;
 999        }
1000}
1001
1002int transport_connect(struct transport *transport, const char *name,
1003                      const char *exec, int fd[2])
1004{
1005        if (transport->connect)
1006                return transport->connect(transport, name, exec, fd);
1007        else
1008                die("Operation not supported by protocol");
1009}
1010
1011int transport_disconnect(struct transport *transport)
1012{
1013        int ret = 0;
1014        if (transport->disconnect)
1015                ret = transport->disconnect(transport);
1016        free(transport);
1017        return ret;
1018}
1019
1020/*
1021 * Strip username (and password) from a URL and return
1022 * it in a newly allocated string.
1023 */
1024char *transport_anonymize_url(const char *url)
1025{
1026        char *scheme_prefix, *anon_part;
1027        size_t anon_len, prefix_len = 0;
1028
1029        anon_part = strchr(url, '@');
1030        if (url_is_local_not_ssh(url) || !anon_part)
1031                goto literal_copy;
1032
1033        anon_len = strlen(++anon_part);
1034        scheme_prefix = strstr(url, "://");
1035        if (!scheme_prefix) {
1036                if (!strchr(anon_part, ':'))
1037                        /* cannot be "me@there:/path/name" */
1038                        goto literal_copy;
1039        } else {
1040                const char *cp;
1041                /* make sure scheme is reasonable */
1042                for (cp = url; cp < scheme_prefix; cp++) {
1043                        switch (*cp) {
1044                                /* RFC 1738 2.1 */
1045                        case '+': case '.': case '-':
1046                                break; /* ok */
1047                        default:
1048                                if (isalnum(*cp))
1049                                        break;
1050                                /* it isn't */
1051                                goto literal_copy;
1052                        }
1053                }
1054                /* @ past the first slash does not count */
1055                cp = strchr(scheme_prefix + 3, '/');
1056                if (cp && cp < anon_part)
1057                        goto literal_copy;
1058                prefix_len = scheme_prefix - url + 3;
1059        }
1060        return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1061                       (int)anon_len, anon_part);
1062literal_copy:
1063        return xstrdup(url);
1064}
1065
1066struct alternate_refs_data {
1067        alternate_ref_fn *fn;
1068        void *data;
1069};
1070
1071static int refs_from_alternate_cb(struct alternate_object_database *e,
1072                                  void *data)
1073{
1074        char *other;
1075        size_t len;
1076        struct remote *remote;
1077        struct transport *transport;
1078        const struct ref *extra;
1079        struct alternate_refs_data *cb = data;
1080
1081        e->name[-1] = '\0';
1082        other = xstrdup(real_path(e->base));
1083        e->name[-1] = '/';
1084        len = strlen(other);
1085
1086        while (other[len-1] == '/')
1087                other[--len] = '\0';
1088        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1089                goto out;
1090        /* Is this a git repository with refs? */
1091        memcpy(other + len - 8, "/refs", 6);
1092        if (!is_directory(other))
1093                goto out;
1094        other[len - 8] = '\0';
1095        remote = remote_get(other);
1096        transport = transport_get(remote, other);
1097        for (extra = transport_get_remote_refs(transport);
1098             extra;
1099             extra = extra->next)
1100                cb->fn(extra, cb->data);
1101        transport_disconnect(transport);
1102out:
1103        free(other);
1104        return 0;
1105}
1106
1107void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1108{
1109        struct alternate_refs_data cb;
1110        cb.fn = fn;
1111        cb.data = data;
1112        foreach_alt_odb(refs_from_alternate_cb, &cb);
1113}