Andrew's git / gitweb.git / transport.c
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transport.con commit Merge branch 'rs/compat-strdup' into maint (815a73f)
   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.push_options = transport->push_options;
 514        args.url = transport->url;
 515
 516        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 517                args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 518        else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 519                args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 520        else
 521                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 522
 523        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 524                        &data->extra_have);
 525
 526        close(data->fd[1]);
 527        close(data->fd[0]);
 528        ret |= finish_connect(data->conn);
 529        data->conn = NULL;
 530        data->got_remote_heads = 0;
 531
 532        return ret;
 533}
 534
 535static int connect_git(struct transport *transport, const char *name,
 536                       const char *executable, int fd[2])
 537{
 538        struct git_transport_data *data = transport->data;
 539        data->conn = git_connect(data->fd, transport->url,
 540                                 executable, 0);
 541        fd[0] = data->fd[0];
 542        fd[1] = data->fd[1];
 543        return 0;
 544}
 545
 546static int disconnect_git(struct transport *transport)
 547{
 548        struct git_transport_data *data = transport->data;
 549        if (data->conn) {
 550                if (data->got_remote_heads)
 551                        packet_flush(data->fd[1]);
 552                close(data->fd[0]);
 553                close(data->fd[1]);
 554                finish_connect(data->conn);
 555        }
 556
 557        free(data);
 558        return 0;
 559}
 560
 561void transport_take_over(struct transport *transport,
 562                         struct child_process *child)
 563{
 564        struct git_transport_data *data;
 565
 566        if (!transport->smart_options)
 567                die("BUG: taking over transport requires non-NULL "
 568                    "smart_options field.");
 569
 570        data = xcalloc(1, sizeof(*data));
 571        data->options = *transport->smart_options;
 572        data->conn = child;
 573        data->fd[0] = data->conn->out;
 574        data->fd[1] = data->conn->in;
 575        data->got_remote_heads = 0;
 576        transport->data = data;
 577
 578        transport->set_option = NULL;
 579        transport->get_refs_list = get_refs_via_connect;
 580        transport->fetch = fetch_refs_via_pack;
 581        transport->push = NULL;
 582        transport->push_refs = git_transport_push;
 583        transport->disconnect = disconnect_git;
 584        transport->smart_options = &(data->options);
 585
 586        transport->cannot_reuse = 1;
 587}
 588
 589static int is_file(const char *url)
 590{
 591        struct stat buf;
 592        if (stat(url, &buf))
 593                return 0;
 594        return S_ISREG(buf.st_mode);
 595}
 596
 597static int external_specification_len(const char *url)
 598{
 599        return strchr(url, ':') - url;
 600}
 601
 602static const struct string_list *protocol_whitelist(void)
 603{
 604        static int enabled = -1;
 605        static struct string_list allowed = STRING_LIST_INIT_DUP;
 606
 607        if (enabled < 0) {
 608                const char *v = getenv("GIT_ALLOW_PROTOCOL");
 609                if (v) {
 610                        string_list_split(&allowed, v, ':', -1);
 611                        string_list_sort(&allowed);
 612                        enabled = 1;
 613                } else {
 614                        enabled = 0;
 615                }
 616        }
 617
 618        return enabled ? &allowed : NULL;
 619}
 620
 621int is_transport_allowed(const char *type)
 622{
 623        const struct string_list *allowed = protocol_whitelist();
 624        return !allowed || string_list_has_string(allowed, type);
 625}
 626
 627void transport_check_allowed(const char *type)
 628{
 629        if (!is_transport_allowed(type))
 630                die("transport '%s' not allowed", type);
 631}
 632
 633int transport_restrict_protocols(void)
 634{
 635        return !!protocol_whitelist();
 636}
 637
 638struct transport *transport_get(struct remote *remote, const char *url)
 639{
 640        const char *helper;
 641        struct transport *ret = xcalloc(1, sizeof(*ret));
 642
 643        ret->progress = isatty(2);
 644
 645        if (!remote)
 646                die("No remote provided to transport_get()");
 647
 648        ret->got_remote_refs = 0;
 649        ret->remote = remote;
 650        helper = remote->foreign_vcs;
 651
 652        if (!url && remote->url)
 653                url = remote->url[0];
 654        ret->url = url;
 655
 656        /* maybe it is a foreign URL? */
 657        if (url) {
 658                const char *p = url;
 659
 660                while (is_urlschemechar(p == url, *p))
 661                        p++;
 662                if (starts_with(p, "::"))
 663                        helper = xstrndup(url, p - url);
 664        }
 665
 666        if (helper) {
 667                transport_helper_init(ret, helper);
 668        } else if (starts_with(url, "rsync:")) {
 669                die("git-over-rsync is no longer supported");
 670        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 671                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 672                transport_check_allowed("file");
 673                ret->data = data;
 674                ret->get_refs_list = get_refs_from_bundle;
 675                ret->fetch = fetch_refs_from_bundle;
 676                ret->disconnect = close_bundle;
 677                ret->smart_options = NULL;
 678        } else if (!is_url(url)
 679                || starts_with(url, "file://")
 680                || starts_with(url, "git://")
 681                || starts_with(url, "ssh://")
 682                || starts_with(url, "git+ssh://") /* deprecated - do not use */
 683                || starts_with(url, "ssh+git://") /* deprecated - do not use */
 684                ) {
 685                /*
 686                 * These are builtin smart transports; "allowed" transports
 687                 * will be checked individually in git_connect.
 688                 */
 689                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 690                ret->data = data;
 691                ret->set_option = NULL;
 692                ret->get_refs_list = get_refs_via_connect;
 693                ret->fetch = fetch_refs_via_pack;
 694                ret->push_refs = git_transport_push;
 695                ret->connect = connect_git;
 696                ret->disconnect = disconnect_git;
 697                ret->smart_options = &(data->options);
 698
 699                data->conn = NULL;
 700                data->got_remote_heads = 0;
 701        } else {
 702                /* Unknown protocol in URL. Pass to external handler. */
 703                int len = external_specification_len(url);
 704                char *handler = xmemdupz(url, len);
 705                transport_helper_init(ret, handler);
 706        }
 707
 708        if (ret->smart_options) {
 709                ret->smart_options->thin = 1;
 710                ret->smart_options->uploadpack = "git-upload-pack";
 711                if (remote->uploadpack)
 712                        ret->smart_options->uploadpack = remote->uploadpack;
 713                ret->smart_options->receivepack = "git-receive-pack";
 714                if (remote->receivepack)
 715                        ret->smart_options->receivepack = remote->receivepack;
 716        }
 717
 718        return ret;
 719}
 720
 721int transport_set_option(struct transport *transport,
 722                         const char *name, const char *value)
 723{
 724        int git_reports = 1, protocol_reports = 1;
 725
 726        if (transport->smart_options)
 727                git_reports = set_git_option(transport->smart_options,
 728                                             name, value);
 729
 730        if (transport->set_option)
 731                protocol_reports = transport->set_option(transport, name,
 732                                                        value);
 733
 734        /* If either report is 0, report 0 (success). */
 735        if (!git_reports || !protocol_reports)
 736                return 0;
 737        /* If either reports -1 (invalid value), report -1. */
 738        if ((git_reports == -1) || (protocol_reports == -1))
 739                return -1;
 740        /* Otherwise if both report unknown, report unknown. */
 741        return 1;
 742}
 743
 744void transport_set_verbosity(struct transport *transport, int verbosity,
 745        int force_progress)
 746{
 747        if (verbosity >= 1)
 748                transport->verbose = verbosity <= 3 ? verbosity : 3;
 749        if (verbosity < 0)
 750                transport->verbose = -1;
 751
 752        /**
 753         * Rules used to determine whether to report progress (processing aborts
 754         * when a rule is satisfied):
 755         *
 756         *   . Report progress, if force_progress is 1 (ie. --progress).
 757         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 758         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 759         *   . Report progress if isatty(2) is 1.
 760         **/
 761        if (force_progress >= 0)
 762                transport->progress = !!force_progress;
 763        else
 764                transport->progress = verbosity >= 0 && isatty(2);
 765}
 766
 767static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 768{
 769        int i;
 770
 771        fprintf(stderr, _("The following submodule paths contain changes that can\n"
 772                        "not be found on any remote:\n"));
 773        for (i = 0; i < needs_pushing->nr; i++)
 774                printf("  %s\n", needs_pushing->items[i].string);
 775        fprintf(stderr, _("\nPlease try\n\n"
 776                          "     git push --recurse-submodules=on-demand\n\n"
 777                          "or cd to the path and use\n\n"
 778                          "     git push\n\n"
 779                          "to push them to a remote.\n\n"));
 780
 781        string_list_clear(needs_pushing, 0);
 782
 783        die(_("Aborting."));
 784}
 785
 786static int run_pre_push_hook(struct transport *transport,
 787                             struct ref *remote_refs)
 788{
 789        int ret = 0, x;
 790        struct ref *r;
 791        struct child_process proc = CHILD_PROCESS_INIT;
 792        struct strbuf buf;
 793        const char *argv[4];
 794
 795        if (!(argv[0] = find_hook("pre-push")))
 796                return 0;
 797
 798        argv[1] = transport->remote->name;
 799        argv[2] = transport->url;
 800        argv[3] = NULL;
 801
 802        proc.argv = argv;
 803        proc.in = -1;
 804
 805        if (start_command(&proc)) {
 806                finish_command(&proc);
 807                return -1;
 808        }
 809
 810        sigchain_push(SIGPIPE, SIG_IGN);
 811
 812        strbuf_init(&buf, 256);
 813
 814        for (r = remote_refs; r; r = r->next) {
 815                if (!r->peer_ref) continue;
 816                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 817                if (r->status == REF_STATUS_REJECT_STALE) continue;
 818                if (r->status == REF_STATUS_UPTODATE) continue;
 819
 820                strbuf_reset(&buf);
 821                strbuf_addf( &buf, "%s %s %s %s\n",
 822                         r->peer_ref->name, oid_to_hex(&r->new_oid),
 823                         r->name, oid_to_hex(&r->old_oid));
 824
 825                if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 826                        /* We do not mind if a hook does not read all refs. */
 827                        if (errno != EPIPE)
 828                                ret = -1;
 829                        break;
 830                }
 831        }
 832
 833        strbuf_release(&buf);
 834
 835        x = close(proc.in);
 836        if (!ret)
 837                ret = x;
 838
 839        sigchain_pop(SIGPIPE);
 840
 841        x = finish_command(&proc);
 842        if (!ret)
 843                ret = x;
 844
 845        return ret;
 846}
 847
 848int transport_push(struct transport *transport,
 849                   int refspec_nr, const char **refspec, int flags,
 850                   unsigned int *reject_reasons)
 851{
 852        *reject_reasons = 0;
 853        transport_verify_remote_names(refspec_nr, refspec);
 854
 855        if (transport->push) {
 856                /* Maybe FIXME. But no important transport uses this case. */
 857                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 858                        die("This transport does not support using --set-upstream");
 859
 860                return transport->push(transport, refspec_nr, refspec, flags);
 861        } else if (transport->push_refs) {
 862                struct ref *remote_refs;
 863                struct ref *local_refs = get_local_heads();
 864                int match_flags = MATCH_REFS_NONE;
 865                int verbose = (transport->verbose > 0);
 866                int quiet = (transport->verbose < 0);
 867                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 868                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 869                int push_ret, ret, err;
 870
 871                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 872                        return -1;
 873
 874                remote_refs = transport->get_refs_list(transport, 1);
 875
 876                if (flags & TRANSPORT_PUSH_ALL)
 877                        match_flags |= MATCH_REFS_ALL;
 878                if (flags & TRANSPORT_PUSH_MIRROR)
 879                        match_flags |= MATCH_REFS_MIRROR;
 880                if (flags & TRANSPORT_PUSH_PRUNE)
 881                        match_flags |= MATCH_REFS_PRUNE;
 882                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
 883                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
 884
 885                if (match_push_refs(local_refs, &remote_refs,
 886                                    refspec_nr, refspec, match_flags)) {
 887                        return -1;
 888                }
 889
 890                if (transport->smart_options &&
 891                    transport->smart_options->cas &&
 892                    !is_empty_cas(transport->smart_options->cas))
 893                        apply_push_cas(transport->smart_options->cas,
 894                                       transport->remote, remote_refs);
 895
 896                set_ref_status_for_push(remote_refs,
 897                        flags & TRANSPORT_PUSH_MIRROR,
 898                        flags & TRANSPORT_PUSH_FORCE);
 899
 900                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
 901                        if (run_pre_push_hook(transport, remote_refs))
 902                                return -1;
 903
 904                if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
 905                        struct ref *ref = remote_refs;
 906                        for (; ref; ref = ref->next)
 907                                if (!is_null_oid(&ref->new_oid) &&
 908                                    !push_unpushed_submodules(ref->new_oid.hash,
 909                                            transport->remote->name))
 910                                    die ("Failed to push all needed submodules!");
 911                }
 912
 913                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
 914                              TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
 915                        struct ref *ref = remote_refs;
 916                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 917
 918                        for (; ref; ref = ref->next)
 919                                if (!is_null_oid(&ref->new_oid) &&
 920                                    find_unpushed_submodules(ref->new_oid.hash,
 921                                            transport->remote->name, &needs_pushing))
 922                                        die_with_unpushed_submodules(&needs_pushing);
 923                }
 924
 925                push_ret = transport->push_refs(transport, remote_refs, flags);
 926                err = push_had_errors(remote_refs);
 927                ret = push_ret | err;
 928
 929                if (!quiet || err)
 930                        transport_print_push_status(transport->url, remote_refs,
 931                                        verbose | porcelain, porcelain,
 932                                        reject_reasons);
 933
 934                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 935                        set_upstreams(transport, remote_refs, pretend);
 936
 937                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 938                        struct ref *ref;
 939                        for (ref = remote_refs; ref; ref = ref->next)
 940                                transport_update_tracking_ref(transport->remote, ref, verbose);
 941                }
 942
 943                if (porcelain && !push_ret)
 944                        puts("Done");
 945                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
 946                        fprintf(stderr, "Everything up-to-date\n");
 947
 948                return ret;
 949        }
 950        return 1;
 951}
 952
 953const struct ref *transport_get_remote_refs(struct transport *transport)
 954{
 955        if (!transport->got_remote_refs) {
 956                transport->remote_refs = transport->get_refs_list(transport, 0);
 957                transport->got_remote_refs = 1;
 958        }
 959
 960        return transport->remote_refs;
 961}
 962
 963int transport_fetch_refs(struct transport *transport, struct ref *refs)
 964{
 965        int rc;
 966        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 967        struct ref **heads = NULL;
 968        struct ref *rm;
 969
 970        for (rm = refs; rm; rm = rm->next) {
 971                nr_refs++;
 972                if (rm->peer_ref &&
 973                    !is_null_oid(&rm->old_oid) &&
 974                    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
 975                        continue;
 976                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 977                heads[nr_heads++] = rm;
 978        }
 979
 980        if (!nr_heads) {
 981                /*
 982                 * When deepening of a shallow repository is requested,
 983                 * then local and remote refs are likely to still be equal.
 984                 * Just feed them all to the fetch method in that case.
 985                 * This condition shouldn't be met in a non-deepening fetch
 986                 * (see builtin/fetch.c:quickfetch()).
 987                 */
 988                ALLOC_ARRAY(heads, nr_refs);
 989                for (rm = refs; rm; rm = rm->next)
 990                        heads[nr_heads++] = rm;
 991        }
 992
 993        rc = transport->fetch(transport, nr_heads, heads);
 994
 995        free(heads);
 996        return rc;
 997}
 998
 999void transport_unlock_pack(struct transport *transport)
1000{
1001        if (transport->pack_lockfile) {
1002                unlink_or_warn(transport->pack_lockfile);
1003                free(transport->pack_lockfile);
1004                transport->pack_lockfile = NULL;
1005        }
1006}
1007
1008int transport_connect(struct transport *transport, const char *name,
1009                      const char *exec, int fd[2])
1010{
1011        if (transport->connect)
1012                return transport->connect(transport, name, exec, fd);
1013        else
1014                die("Operation not supported by protocol");
1015}
1016
1017int transport_disconnect(struct transport *transport)
1018{
1019        int ret = 0;
1020        if (transport->disconnect)
1021                ret = transport->disconnect(transport);
1022        free(transport);
1023        return ret;
1024}
1025
1026/*
1027 * Strip username (and password) from a URL and return
1028 * it in a newly allocated string.
1029 */
1030char *transport_anonymize_url(const char *url)
1031{
1032        char *scheme_prefix, *anon_part;
1033        size_t anon_len, prefix_len = 0;
1034
1035        anon_part = strchr(url, '@');
1036        if (url_is_local_not_ssh(url) || !anon_part)
1037                goto literal_copy;
1038
1039        anon_len = strlen(++anon_part);
1040        scheme_prefix = strstr(url, "://");
1041        if (!scheme_prefix) {
1042                if (!strchr(anon_part, ':'))
1043                        /* cannot be "me@there:/path/name" */
1044                        goto literal_copy;
1045        } else {
1046                const char *cp;
1047                /* make sure scheme is reasonable */
1048                for (cp = url; cp < scheme_prefix; cp++) {
1049                        switch (*cp) {
1050                                /* RFC 1738 2.1 */
1051                        case '+': case '.': case '-':
1052                                break; /* ok */
1053                        default:
1054                                if (isalnum(*cp))
1055                                        break;
1056                                /* it isn't */
1057                                goto literal_copy;
1058                        }
1059                }
1060                /* @ past the first slash does not count */
1061                cp = strchr(scheme_prefix + 3, '/');
1062                if (cp && cp < anon_part)
1063                        goto literal_copy;
1064                prefix_len = scheme_prefix - url + 3;
1065        }
1066        return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1067                       (int)anon_len, anon_part);
1068literal_copy:
1069        return xstrdup(url);
1070}
1071
1072struct alternate_refs_data {
1073        alternate_ref_fn *fn;
1074        void *data;
1075};
1076
1077static int refs_from_alternate_cb(struct alternate_object_database *e,
1078                                  void *data)
1079{
1080        char *other;
1081        size_t len;
1082        struct remote *remote;
1083        struct transport *transport;
1084        const struct ref *extra;
1085        struct alternate_refs_data *cb = data;
1086
1087        e->name[-1] = '\0';
1088        other = xstrdup(real_path(e->base));
1089        e->name[-1] = '/';
1090        len = strlen(other);
1091
1092        while (other[len-1] == '/')
1093                other[--len] = '\0';
1094        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1095                goto out;
1096        /* Is this a git repository with refs? */
1097        memcpy(other + len - 8, "/refs", 6);
1098        if (!is_directory(other))
1099                goto out;
1100        other[len - 8] = '\0';
1101        remote = remote_get(other);
1102        transport = transport_get(remote, other);
1103        for (extra = transport_get_remote_refs(transport);
1104             extra;
1105             extra = extra->next)
1106                cb->fn(extra, cb->data);
1107        transport_disconnect(transport);
1108out:
1109        free(other);
1110        return 0;
1111}
1112
1113void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1114{
1115        struct alternate_refs_data cb;
1116        cb.fn = fn;
1117        cb.data = data;
1118        foreach_alt_odb(refs_from_alternate_cb, &cb);
1119}