Andrew's git / gitweb.git / transport.c
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transport.con commit clone: define shallow clone boundary based on time with --shallow-since (994c2aa)
   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        } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 155                opts->deepen_since = value;
 156                return 0;
 157        }
 158        return 1;
 159}
 160
 161static int connect_setup(struct transport *transport, int for_push)
 162{
 163        struct git_transport_data *data = transport->data;
 164        int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 165
 166        if (data->conn)
 167                return 0;
 168
 169        data->conn = git_connect(data->fd, transport->url,
 170                                 for_push ? data->options.receivepack :
 171                                 data->options.uploadpack,
 172                                 flags);
 173
 174        return 0;
 175}
 176
 177static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 178{
 179        struct git_transport_data *data = transport->data;
 180        struct ref *refs;
 181
 182        connect_setup(transport, for_push);
 183        get_remote_heads(data->fd[0], NULL, 0, &refs,
 184                         for_push ? REF_NORMAL : 0,
 185                         &data->extra_have,
 186                         &data->shallow);
 187        data->got_remote_heads = 1;
 188
 189        return refs;
 190}
 191
 192static int fetch_refs_via_pack(struct transport *transport,
 193                               int nr_heads, struct ref **to_fetch)
 194{
 195        struct git_transport_data *data = transport->data;
 196        struct ref *refs;
 197        char *dest = xstrdup(transport->url);
 198        struct fetch_pack_args args;
 199        struct ref *refs_tmp = NULL;
 200
 201        memset(&args, 0, sizeof(args));
 202        args.uploadpack = data->options.uploadpack;
 203        args.keep_pack = data->options.keep;
 204        args.lock_pack = 1;
 205        args.use_thin_pack = data->options.thin;
 206        args.include_tag = data->options.followtags;
 207        args.verbose = (transport->verbose > 1);
 208        args.quiet = (transport->verbose < 0);
 209        args.no_progress = !transport->progress;
 210        args.depth = data->options.depth;
 211        args.deepen_since = data->options.deepen_since;
 212        args.check_self_contained_and_connected =
 213                data->options.check_self_contained_and_connected;
 214        args.cloning = transport->cloning;
 215        args.update_shallow = data->options.update_shallow;
 216
 217        if (!data->got_remote_heads) {
 218                connect_setup(transport, 0);
 219                get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 220                                 NULL, &data->shallow);
 221                data->got_remote_heads = 1;
 222        }
 223
 224        refs = fetch_pack(&args, data->fd, data->conn,
 225                          refs_tmp ? refs_tmp : transport->remote_refs,
 226                          dest, to_fetch, nr_heads, &data->shallow,
 227                          &transport->pack_lockfile);
 228        close(data->fd[0]);
 229        close(data->fd[1]);
 230        if (finish_connect(data->conn)) {
 231                free_refs(refs);
 232                refs = NULL;
 233        }
 234        data->conn = NULL;
 235        data->got_remote_heads = 0;
 236        data->options.self_contained_and_connected =
 237                args.self_contained_and_connected;
 238
 239        free_refs(refs_tmp);
 240        free_refs(refs);
 241        free(dest);
 242        return (refs ? 0 : -1);
 243}
 244
 245static int push_had_errors(struct ref *ref)
 246{
 247        for (; ref; ref = ref->next) {
 248                switch (ref->status) {
 249                case REF_STATUS_NONE:
 250                case REF_STATUS_UPTODATE:
 251                case REF_STATUS_OK:
 252                        break;
 253                default:
 254                        return 1;
 255                }
 256        }
 257        return 0;
 258}
 259
 260int transport_refs_pushed(struct ref *ref)
 261{
 262        for (; ref; ref = ref->next) {
 263                switch(ref->status) {
 264                case REF_STATUS_NONE:
 265                case REF_STATUS_UPTODATE:
 266                        break;
 267                default:
 268                        return 1;
 269                }
 270        }
 271        return 0;
 272}
 273
 274void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 275{
 276        struct refspec rs;
 277
 278        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 279                return;
 280
 281        rs.src = ref->name;
 282        rs.dst = NULL;
 283
 284        if (!remote_find_tracking(remote, &rs)) {
 285                if (verbose)
 286                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 287                if (ref->deletion) {
 288                        delete_ref(rs.dst, NULL, 0);
 289                } else
 290                        update_ref("update by push", rs.dst,
 291                                        ref->new_oid.hash, NULL, 0, 0);
 292                free(rs.dst);
 293        }
 294}
 295
 296static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 297{
 298        if (porcelain) {
 299                if (from)
 300                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 301                else
 302                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 303                if (msg)
 304                        fprintf(stdout, "%s (%s)\n", summary, msg);
 305                else
 306                        fprintf(stdout, "%s\n", summary);
 307        } else {
 308                fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 309                if (from)
 310                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 311                else
 312                        fputs(prettify_refname(to->name), stderr);
 313                if (msg) {
 314                        fputs(" (", stderr);
 315                        fputs(msg, stderr);
 316                        fputc(')', stderr);
 317                }
 318                fputc('\n', stderr);
 319        }
 320}
 321
 322static const char *status_abbrev(unsigned char sha1[20])
 323{
 324        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 325}
 326
 327static void print_ok_ref_status(struct ref *ref, int porcelain)
 328{
 329        if (ref->deletion)
 330                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 331        else if (is_null_oid(&ref->old_oid))
 332                print_ref_status('*',
 333                        (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 334                        "[new branch]"),
 335                        ref, ref->peer_ref, NULL, porcelain);
 336        else {
 337                struct strbuf quickref = STRBUF_INIT;
 338                char type;
 339                const char *msg;
 340
 341                strbuf_addstr(&quickref, status_abbrev(ref->old_oid.hash));
 342                if (ref->forced_update) {
 343                        strbuf_addstr(&quickref, "...");
 344                        type = '+';
 345                        msg = "forced update";
 346                } else {
 347                        strbuf_addstr(&quickref, "..");
 348                        type = ' ';
 349                        msg = NULL;
 350                }
 351                strbuf_addstr(&quickref, status_abbrev(ref->new_oid.hash));
 352
 353                print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg, porcelain);
 354                strbuf_release(&quickref);
 355        }
 356}
 357
 358static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 359{
 360        if (!count)
 361                fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
 362
 363        switch(ref->status) {
 364        case REF_STATUS_NONE:
 365                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 366                break;
 367        case REF_STATUS_REJECT_NODELETE:
 368                print_ref_status('!', "[rejected]", ref, NULL,
 369                                                 "remote does not support deleting refs", porcelain);
 370                break;
 371        case REF_STATUS_UPTODATE:
 372                print_ref_status('=', "[up to date]", ref,
 373                                                 ref->peer_ref, NULL, porcelain);
 374                break;
 375        case REF_STATUS_REJECT_NONFASTFORWARD:
 376                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 377                                                 "non-fast-forward", porcelain);
 378                break;
 379        case REF_STATUS_REJECT_ALREADY_EXISTS:
 380                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 381                                                 "already exists", porcelain);
 382                break;
 383        case REF_STATUS_REJECT_FETCH_FIRST:
 384                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 385                                                 "fetch first", porcelain);
 386                break;
 387        case REF_STATUS_REJECT_NEEDS_FORCE:
 388                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 389                                                 "needs force", porcelain);
 390                break;
 391        case REF_STATUS_REJECT_STALE:
 392                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 393                                                 "stale info", porcelain);
 394                break;
 395        case REF_STATUS_REJECT_SHALLOW:
 396                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 397                                                 "new shallow roots not allowed", porcelain);
 398                break;
 399        case REF_STATUS_REMOTE_REJECT:
 400                print_ref_status('!', "[remote rejected]", ref,
 401                                                 ref->deletion ? NULL : ref->peer_ref,
 402                                                 ref->remote_status, porcelain);
 403                break;
 404        case REF_STATUS_EXPECTING_REPORT:
 405                print_ref_status('!', "[remote failure]", ref,
 406                                                 ref->deletion ? NULL : ref->peer_ref,
 407                                                 "remote failed to report status", porcelain);
 408                break;
 409        case REF_STATUS_ATOMIC_PUSH_FAILED:
 410                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 411                                                 "atomic push failed", porcelain);
 412                break;
 413        case REF_STATUS_OK:
 414                print_ok_ref_status(ref, porcelain);
 415                break;
 416        }
 417
 418        return 1;
 419}
 420
 421void transport_print_push_status(const char *dest, struct ref *refs,
 422                                  int verbose, int porcelain, unsigned int *reject_reasons)
 423{
 424        struct ref *ref;
 425        int n = 0;
 426        unsigned char head_sha1[20];
 427        char *head;
 428
 429        head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
 430
 431        if (verbose) {
 432                for (ref = refs; ref; ref = ref->next)
 433                        if (ref->status == REF_STATUS_UPTODATE)
 434                                n += print_one_push_status(ref, dest, n, porcelain);
 435        }
 436
 437        for (ref = refs; ref; ref = ref->next)
 438                if (ref->status == REF_STATUS_OK)
 439                        n += print_one_push_status(ref, dest, n, porcelain);
 440
 441        *reject_reasons = 0;
 442        for (ref = refs; ref; ref = ref->next) {
 443                if (ref->status != REF_STATUS_NONE &&
 444                    ref->status != REF_STATUS_UPTODATE &&
 445                    ref->status != REF_STATUS_OK)
 446                        n += print_one_push_status(ref, dest, n, porcelain);
 447                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 448                        if (head != NULL && !strcmp(head, ref->name))
 449                                *reject_reasons |= REJECT_NON_FF_HEAD;
 450                        else
 451                                *reject_reasons |= REJECT_NON_FF_OTHER;
 452                } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 453                        *reject_reasons |= REJECT_ALREADY_EXISTS;
 454                } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 455                        *reject_reasons |= REJECT_FETCH_FIRST;
 456                } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 457                        *reject_reasons |= REJECT_NEEDS_FORCE;
 458                }
 459        }
 460        free(head);
 461}
 462
 463void transport_verify_remote_names(int nr_heads, const char **heads)
 464{
 465        int i;
 466
 467        for (i = 0; i < nr_heads; i++) {
 468                const char *local = heads[i];
 469                const char *remote = strrchr(heads[i], ':');
 470
 471                if (*local == '+')
 472                        local++;
 473
 474                /* A matching refspec is okay.  */
 475                if (remote == local && remote[1] == '\0')
 476                        continue;
 477
 478                remote = remote ? (remote + 1) : local;
 479                if (check_refname_format(remote,
 480                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 481                        die("remote part of refspec is not a valid name in %s",
 482                                heads[i]);
 483        }
 484}
 485
 486static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 487{
 488        struct git_transport_data *data = transport->data;
 489        struct send_pack_args args;
 490        int ret;
 491
 492        if (!data->got_remote_heads) {
 493                struct ref *tmp_refs;
 494                connect_setup(transport, 1);
 495
 496                get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 497                                 NULL, &data->shallow);
 498                data->got_remote_heads = 1;
 499        }
 500
 501        memset(&args, 0, sizeof(args));
 502        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 503        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 504        args.use_thin_pack = data->options.thin;
 505        args.verbose = (transport->verbose > 0);
 506        args.quiet = (transport->verbose < 0);
 507        args.progress = transport->progress;
 508        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 509        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 510        args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 511        args.url = transport->url;
 512
 513        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 514                args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 515        else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 516                args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 517        else
 518                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 519
 520        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 521                        &data->extra_have);
 522
 523        close(data->fd[1]);
 524        close(data->fd[0]);
 525        ret |= finish_connect(data->conn);
 526        data->conn = NULL;
 527        data->got_remote_heads = 0;
 528
 529        return ret;
 530}
 531
 532static int connect_git(struct transport *transport, const char *name,
 533                       const char *executable, int fd[2])
 534{
 535        struct git_transport_data *data = transport->data;
 536        data->conn = git_connect(data->fd, transport->url,
 537                                 executable, 0);
 538        fd[0] = data->fd[0];
 539        fd[1] = data->fd[1];
 540        return 0;
 541}
 542
 543static int disconnect_git(struct transport *transport)
 544{
 545        struct git_transport_data *data = transport->data;
 546        if (data->conn) {
 547                if (data->got_remote_heads)
 548                        packet_flush(data->fd[1]);
 549                close(data->fd[0]);
 550                close(data->fd[1]);
 551                finish_connect(data->conn);
 552        }
 553
 554        free(data);
 555        return 0;
 556}
 557
 558void transport_take_over(struct transport *transport,
 559                         struct child_process *child)
 560{
 561        struct git_transport_data *data;
 562
 563        if (!transport->smart_options)
 564                die("Bug detected: Taking over transport requires non-NULL "
 565                    "smart_options field.");
 566
 567        data = xcalloc(1, sizeof(*data));
 568        data->options = *transport->smart_options;
 569        data->conn = child;
 570        data->fd[0] = data->conn->out;
 571        data->fd[1] = data->conn->in;
 572        data->got_remote_heads = 0;
 573        transport->data = data;
 574
 575        transport->set_option = NULL;
 576        transport->get_refs_list = get_refs_via_connect;
 577        transport->fetch = fetch_refs_via_pack;
 578        transport->push = NULL;
 579        transport->push_refs = git_transport_push;
 580        transport->disconnect = disconnect_git;
 581        transport->smart_options = &(data->options);
 582
 583        transport->cannot_reuse = 1;
 584}
 585
 586static int is_file(const char *url)
 587{
 588        struct stat buf;
 589        if (stat(url, &buf))
 590                return 0;
 591        return S_ISREG(buf.st_mode);
 592}
 593
 594static int external_specification_len(const char *url)
 595{
 596        return strchr(url, ':') - url;
 597}
 598
 599static const struct string_list *protocol_whitelist(void)
 600{
 601        static int enabled = -1;
 602        static struct string_list allowed = STRING_LIST_INIT_DUP;
 603
 604        if (enabled < 0) {
 605                const char *v = getenv("GIT_ALLOW_PROTOCOL");
 606                if (v) {
 607                        string_list_split(&allowed, v, ':', -1);
 608                        string_list_sort(&allowed);
 609                        enabled = 1;
 610                } else {
 611                        enabled = 0;
 612                }
 613        }
 614
 615        return enabled ? &allowed : NULL;
 616}
 617
 618int is_transport_allowed(const char *type)
 619{
 620        const struct string_list *allowed = protocol_whitelist();
 621        return !allowed || string_list_has_string(allowed, type);
 622}
 623
 624void transport_check_allowed(const char *type)
 625{
 626        if (!is_transport_allowed(type))
 627                die("transport '%s' not allowed", type);
 628}
 629
 630int transport_restrict_protocols(void)
 631{
 632        return !!protocol_whitelist();
 633}
 634
 635struct transport *transport_get(struct remote *remote, const char *url)
 636{
 637        const char *helper;
 638        struct transport *ret = xcalloc(1, sizeof(*ret));
 639
 640        ret->progress = isatty(2);
 641
 642        if (!remote)
 643                die("No remote provided to transport_get()");
 644
 645        ret->got_remote_refs = 0;
 646        ret->remote = remote;
 647        helper = remote->foreign_vcs;
 648
 649        if (!url && remote->url)
 650                url = remote->url[0];
 651        ret->url = url;
 652
 653        /* maybe it is a foreign URL? */
 654        if (url) {
 655                const char *p = url;
 656
 657                while (is_urlschemechar(p == url, *p))
 658                        p++;
 659                if (starts_with(p, "::"))
 660                        helper = xstrndup(url, p - url);
 661        }
 662
 663        if (helper) {
 664                transport_helper_init(ret, helper);
 665        } else if (starts_with(url, "rsync:")) {
 666                die("git-over-rsync is no longer supported");
 667        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 668                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 669                transport_check_allowed("file");
 670                ret->data = data;
 671                ret->get_refs_list = get_refs_from_bundle;
 672                ret->fetch = fetch_refs_from_bundle;
 673                ret->disconnect = close_bundle;
 674                ret->smart_options = NULL;
 675        } else if (!is_url(url)
 676                || starts_with(url, "file://")
 677                || starts_with(url, "git://")
 678                || starts_with(url, "ssh://")
 679                || starts_with(url, "git+ssh://")
 680                || starts_with(url, "ssh+git://")) {
 681                /*
 682                 * These are builtin smart transports; "allowed" transports
 683                 * will be checked individually in git_connect.
 684                 */
 685                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 686                ret->data = data;
 687                ret->set_option = NULL;
 688                ret->get_refs_list = get_refs_via_connect;
 689                ret->fetch = fetch_refs_via_pack;
 690                ret->push_refs = git_transport_push;
 691                ret->connect = connect_git;
 692                ret->disconnect = disconnect_git;
 693                ret->smart_options = &(data->options);
 694
 695                data->conn = NULL;
 696                data->got_remote_heads = 0;
 697        } else {
 698                /* Unknown protocol in URL. Pass to external handler. */
 699                int len = external_specification_len(url);
 700                char *handler = xmemdupz(url, len);
 701                transport_helper_init(ret, handler);
 702        }
 703
 704        if (ret->smart_options) {
 705                ret->smart_options->thin = 1;
 706                ret->smart_options->uploadpack = "git-upload-pack";
 707                if (remote->uploadpack)
 708                        ret->smart_options->uploadpack = remote->uploadpack;
 709                ret->smart_options->receivepack = "git-receive-pack";
 710                if (remote->receivepack)
 711                        ret->smart_options->receivepack = remote->receivepack;
 712        }
 713
 714        return ret;
 715}
 716
 717int transport_set_option(struct transport *transport,
 718                         const char *name, const char *value)
 719{
 720        int git_reports = 1, protocol_reports = 1;
 721
 722        if (transport->smart_options)
 723                git_reports = set_git_option(transport->smart_options,
 724                                             name, value);
 725
 726        if (transport->set_option)
 727                protocol_reports = transport->set_option(transport, name,
 728                                                        value);
 729
 730        /* If either report is 0, report 0 (success). */
 731        if (!git_reports || !protocol_reports)
 732                return 0;
 733        /* If either reports -1 (invalid value), report -1. */
 734        if ((git_reports == -1) || (protocol_reports == -1))
 735                return -1;
 736        /* Otherwise if both report unknown, report unknown. */
 737        return 1;
 738}
 739
 740void transport_set_verbosity(struct transport *transport, int verbosity,
 741        int force_progress)
 742{
 743        if (verbosity >= 1)
 744                transport->verbose = verbosity <= 3 ? verbosity : 3;
 745        if (verbosity < 0)
 746                transport->verbose = -1;
 747
 748        /**
 749         * Rules used to determine whether to report progress (processing aborts
 750         * when a rule is satisfied):
 751         *
 752         *   . Report progress, if force_progress is 1 (ie. --progress).
 753         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 754         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 755         *   . Report progress if isatty(2) is 1.
 756         **/
 757        if (force_progress >= 0)
 758                transport->progress = !!force_progress;
 759        else
 760                transport->progress = verbosity >= 0 && isatty(2);
 761}
 762
 763static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 764{
 765        int i;
 766
 767        fprintf(stderr, "The following submodule paths contain changes that can\n"
 768                        "not be found on any remote:\n");
 769        for (i = 0; i < needs_pushing->nr; i++)
 770                printf("  %s\n", needs_pushing->items[i].string);
 771        fprintf(stderr, "\nPlease try\n\n"
 772                        "       git push --recurse-submodules=on-demand\n\n"
 773                        "or cd to the path and use\n\n"
 774                        "       git push\n\n"
 775                        "to push them to a remote.\n\n");
 776
 777        string_list_clear(needs_pushing, 0);
 778
 779        die("Aborting.");
 780}
 781
 782static int run_pre_push_hook(struct transport *transport,
 783                             struct ref *remote_refs)
 784{
 785        int ret = 0, x;
 786        struct ref *r;
 787        struct child_process proc = CHILD_PROCESS_INIT;
 788        struct strbuf buf;
 789        const char *argv[4];
 790
 791        if (!(argv[0] = find_hook("pre-push")))
 792                return 0;
 793
 794        argv[1] = transport->remote->name;
 795        argv[2] = transport->url;
 796        argv[3] = NULL;
 797
 798        proc.argv = argv;
 799        proc.in = -1;
 800
 801        if (start_command(&proc)) {
 802                finish_command(&proc);
 803                return -1;
 804        }
 805
 806        sigchain_push(SIGPIPE, SIG_IGN);
 807
 808        strbuf_init(&buf, 256);
 809
 810        for (r = remote_refs; r; r = r->next) {
 811                if (!r->peer_ref) continue;
 812                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 813                if (r->status == REF_STATUS_REJECT_STALE) continue;
 814                if (r->status == REF_STATUS_UPTODATE) continue;
 815
 816                strbuf_reset(&buf);
 817                strbuf_addf( &buf, "%s %s %s %s\n",
 818                         r->peer_ref->name, oid_to_hex(&r->new_oid),
 819                         r->name, oid_to_hex(&r->old_oid));
 820
 821                if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 822                        /* We do not mind if a hook does not read all refs. */
 823                        if (errno != EPIPE)
 824                                ret = -1;
 825                        break;
 826                }
 827        }
 828
 829        strbuf_release(&buf);
 830
 831        x = close(proc.in);
 832        if (!ret)
 833                ret = x;
 834
 835        sigchain_pop(SIGPIPE);
 836
 837        x = finish_command(&proc);
 838        if (!ret)
 839                ret = x;
 840
 841        return ret;
 842}
 843
 844int transport_push(struct transport *transport,
 845                   int refspec_nr, const char **refspec, int flags,
 846                   unsigned int *reject_reasons)
 847{
 848        *reject_reasons = 0;
 849        transport_verify_remote_names(refspec_nr, refspec);
 850
 851        if (transport->push) {
 852                /* Maybe FIXME. But no important transport uses this case. */
 853                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 854                        die("This transport does not support using --set-upstream");
 855
 856                return transport->push(transport, refspec_nr, refspec, flags);
 857        } else if (transport->push_refs) {
 858                struct ref *remote_refs;
 859                struct ref *local_refs = get_local_heads();
 860                int match_flags = MATCH_REFS_NONE;
 861                int verbose = (transport->verbose > 0);
 862                int quiet = (transport->verbose < 0);
 863                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 864                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 865                int push_ret, ret, err;
 866
 867                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 868                        return -1;
 869
 870                remote_refs = transport->get_refs_list(transport, 1);
 871
 872                if (flags & TRANSPORT_PUSH_ALL)
 873                        match_flags |= MATCH_REFS_ALL;
 874                if (flags & TRANSPORT_PUSH_MIRROR)
 875                        match_flags |= MATCH_REFS_MIRROR;
 876                if (flags & TRANSPORT_PUSH_PRUNE)
 877                        match_flags |= MATCH_REFS_PRUNE;
 878                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
 879                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
 880
 881                if (match_push_refs(local_refs, &remote_refs,
 882                                    refspec_nr, refspec, match_flags)) {
 883                        return -1;
 884                }
 885
 886                if (transport->smart_options &&
 887                    transport->smart_options->cas &&
 888                    !is_empty_cas(transport->smart_options->cas))
 889                        apply_push_cas(transport->smart_options->cas,
 890                                       transport->remote, remote_refs);
 891
 892                set_ref_status_for_push(remote_refs,
 893                        flags & TRANSPORT_PUSH_MIRROR,
 894                        flags & TRANSPORT_PUSH_FORCE);
 895
 896                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
 897                        if (run_pre_push_hook(transport, remote_refs))
 898                                return -1;
 899
 900                if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
 901                        struct ref *ref = remote_refs;
 902                        for (; ref; ref = ref->next)
 903                                if (!is_null_oid(&ref->new_oid) &&
 904                                    !push_unpushed_submodules(ref->new_oid.hash,
 905                                            transport->remote->name))
 906                                    die ("Failed to push all needed submodules!");
 907                }
 908
 909                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
 910                              TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
 911                        struct ref *ref = remote_refs;
 912                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 913
 914                        for (; ref; ref = ref->next)
 915                                if (!is_null_oid(&ref->new_oid) &&
 916                                    find_unpushed_submodules(ref->new_oid.hash,
 917                                            transport->remote->name, &needs_pushing))
 918                                        die_with_unpushed_submodules(&needs_pushing);
 919                }
 920
 921                push_ret = transport->push_refs(transport, remote_refs, flags);
 922                err = push_had_errors(remote_refs);
 923                ret = push_ret | err;
 924
 925                if (!quiet || err)
 926                        transport_print_push_status(transport->url, remote_refs,
 927                                        verbose | porcelain, porcelain,
 928                                        reject_reasons);
 929
 930                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 931                        set_upstreams(transport, remote_refs, pretend);
 932
 933                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 934                        struct ref *ref;
 935                        for (ref = remote_refs; ref; ref = ref->next)
 936                                transport_update_tracking_ref(transport->remote, ref, verbose);
 937                }
 938
 939                if (porcelain && !push_ret)
 940                        puts("Done");
 941                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
 942                        fprintf(stderr, "Everything up-to-date\n");
 943
 944                return ret;
 945        }
 946        return 1;
 947}
 948
 949const struct ref *transport_get_remote_refs(struct transport *transport)
 950{
 951        if (!transport->got_remote_refs) {
 952                transport->remote_refs = transport->get_refs_list(transport, 0);
 953                transport->got_remote_refs = 1;
 954        }
 955
 956        return transport->remote_refs;
 957}
 958
 959int transport_fetch_refs(struct transport *transport, struct ref *refs)
 960{
 961        int rc;
 962        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 963        struct ref **heads = NULL;
 964        struct ref *rm;
 965
 966        for (rm = refs; rm; rm = rm->next) {
 967                nr_refs++;
 968                if (rm->peer_ref &&
 969                    !is_null_oid(&rm->old_oid) &&
 970                    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
 971                        continue;
 972                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 973                heads[nr_heads++] = rm;
 974        }
 975
 976        if (!nr_heads) {
 977                /*
 978                 * When deepening of a shallow repository is requested,
 979                 * then local and remote refs are likely to still be equal.
 980                 * Just feed them all to the fetch method in that case.
 981                 * This condition shouldn't be met in a non-deepening fetch
 982                 * (see builtin/fetch.c:quickfetch()).
 983                 */
 984                heads = xmalloc(nr_refs * sizeof(*heads));
 985                for (rm = refs; rm; rm = rm->next)
 986                        heads[nr_heads++] = rm;
 987        }
 988
 989        rc = transport->fetch(transport, nr_heads, heads);
 990
 991        free(heads);
 992        return rc;
 993}
 994
 995void transport_unlock_pack(struct transport *transport)
 996{
 997        if (transport->pack_lockfile) {
 998                unlink_or_warn(transport->pack_lockfile);
 999                free(transport->pack_lockfile);
1000                transport->pack_lockfile = NULL;
1001        }
1002}
1003
1004int transport_connect(struct transport *transport, const char *name,
1005                      const char *exec, int fd[2])
1006{
1007        if (transport->connect)
1008                return transport->connect(transport, name, exec, fd);
1009        else
1010                die("Operation not supported by protocol");
1011}
1012
1013int transport_disconnect(struct transport *transport)
1014{
1015        int ret = 0;
1016        if (transport->disconnect)
1017                ret = transport->disconnect(transport);
1018        free(transport);
1019        return ret;
1020}
1021
1022/*
1023 * Strip username (and password) from a URL and return
1024 * it in a newly allocated string.
1025 */
1026char *transport_anonymize_url(const char *url)
1027{
1028        char *anon_url, *scheme_prefix, *anon_part;
1029        size_t anon_len, prefix_len = 0;
1030
1031        anon_part = strchr(url, '@');
1032        if (url_is_local_not_ssh(url) || !anon_part)
1033                goto literal_copy;
1034
1035        anon_len = strlen(++anon_part);
1036        scheme_prefix = strstr(url, "://");
1037        if (!scheme_prefix) {
1038                if (!strchr(anon_part, ':'))
1039                        /* cannot be "me@there:/path/name" */
1040                        goto literal_copy;
1041        } else {
1042                const char *cp;
1043                /* make sure scheme is reasonable */
1044                for (cp = url; cp < scheme_prefix; cp++) {
1045                        switch (*cp) {
1046                                /* RFC 1738 2.1 */
1047                        case '+': case '.': case '-':
1048                                break; /* ok */
1049                        default:
1050                                if (isalnum(*cp))
1051                                        break;
1052                                /* it isn't */
1053                                goto literal_copy;
1054                        }
1055                }
1056                /* @ past the first slash does not count */
1057                cp = strchr(scheme_prefix + 3, '/');
1058                if (cp && cp < anon_part)
1059                        goto literal_copy;
1060                prefix_len = scheme_prefix - url + 3;
1061        }
1062        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1063        memcpy(anon_url, url, prefix_len);
1064        memcpy(anon_url + prefix_len, anon_part, anon_len);
1065        return anon_url;
1066literal_copy:
1067        return xstrdup(url);
1068}
1069
1070struct alternate_refs_data {
1071        alternate_ref_fn *fn;
1072        void *data;
1073};
1074
1075static int refs_from_alternate_cb(struct alternate_object_database *e,
1076                                  void *data)
1077{
1078        char *other;
1079        size_t len;
1080        struct remote *remote;
1081        struct transport *transport;
1082        const struct ref *extra;
1083        struct alternate_refs_data *cb = data;
1084
1085        e->name[-1] = '\0';
1086        other = xstrdup(real_path(e->base));
1087        e->name[-1] = '/';
1088        len = strlen(other);
1089
1090        while (other[len-1] == '/')
1091                other[--len] = '\0';
1092        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1093                goto out;
1094        /* Is this a git repository with refs? */
1095        memcpy(other + len - 8, "/refs", 6);
1096        if (!is_directory(other))
1097                goto out;
1098        other[len - 8] = '\0';
1099        remote = remote_get(other);
1100        transport = transport_get(remote, other);
1101        for (extra = transport_get_remote_refs(transport);
1102             extra;
1103             extra = extra->next)
1104                cb->fn(extra, cb->data);
1105        transport_disconnect(transport);
1106out:
1107        free(other);
1108        return 0;
1109}
1110
1111void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1112{
1113        struct alternate_refs_data cb;
1114        cb.fn = fn;
1115        cb.data = data;
1116        foreach_alt_odb(refs_from_alternate_cb, &cb);
1117}