Andrew's git / gitweb.git / transport.c
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transport.con commit fetch: pass summary_width down the callchain (901f3d4)
   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,
 299                             struct ref *to, struct ref *from, const char *msg,
 300                             int porcelain, int summary_width)
 301{
 302        if (porcelain) {
 303                if (from)
 304                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 305                else
 306                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 307                if (msg)
 308                        fprintf(stdout, "%s (%s)\n", summary, msg);
 309                else
 310                        fprintf(stdout, "%s\n", summary);
 311        } else {
 312                fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
 313                if (from)
 314                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 315                else
 316                        fputs(prettify_refname(to->name), stderr);
 317                if (msg) {
 318                        fputs(" (", stderr);
 319                        fputs(msg, stderr);
 320                        fputc(')', stderr);
 321                }
 322                fputc('\n', stderr);
 323        }
 324}
 325
 326static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
 327{
 328        if (ref->deletion)
 329                print_ref_status('-', "[deleted]", ref, NULL, NULL,
 330                                 porcelain, summary_width);
 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, summary_width);
 336        else {
 337                struct strbuf quickref = STRBUF_INIT;
 338                char type;
 339                const char *msg;
 340
 341                strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
 342                                         DEFAULT_ABBREV);
 343                if (ref->forced_update) {
 344                        strbuf_addstr(&quickref, "...");
 345                        type = '+';
 346                        msg = "forced update";
 347                } else {
 348                        strbuf_addstr(&quickref, "..");
 349                        type = ' ';
 350                        msg = NULL;
 351                }
 352                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
 353                                         DEFAULT_ABBREV);
 354
 355                print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 356                                 porcelain, summary_width);
 357                strbuf_release(&quickref);
 358        }
 359}
 360
 361static int print_one_push_status(struct ref *ref, const char *dest, int count,
 362                                 int porcelain, int summary_width)
 363{
 364        if (!count) {
 365                char *url = transport_anonymize_url(dest);
 366                fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 367                free(url);
 368        }
 369
 370        switch(ref->status) {
 371        case REF_STATUS_NONE:
 372                print_ref_status('X', "[no match]", ref, NULL, NULL,
 373                                 porcelain, summary_width);
 374                break;
 375        case REF_STATUS_REJECT_NODELETE:
 376                print_ref_status('!', "[rejected]", ref, NULL,
 377                                 "remote does not support deleting refs",
 378                                 porcelain, summary_width);
 379                break;
 380        case REF_STATUS_UPTODATE:
 381                print_ref_status('=', "[up to date]", ref,
 382                                 ref->peer_ref, NULL, porcelain, summary_width);
 383                break;
 384        case REF_STATUS_REJECT_NONFASTFORWARD:
 385                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 386                                 "non-fast-forward", porcelain, summary_width);
 387                break;
 388        case REF_STATUS_REJECT_ALREADY_EXISTS:
 389                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 390                                 "already exists", porcelain, summary_width);
 391                break;
 392        case REF_STATUS_REJECT_FETCH_FIRST:
 393                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 394                                 "fetch first", porcelain, summary_width);
 395                break;
 396        case REF_STATUS_REJECT_NEEDS_FORCE:
 397                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 398                                 "needs force", porcelain, summary_width);
 399                break;
 400        case REF_STATUS_REJECT_STALE:
 401                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 402                                 "stale info", porcelain, summary_width);
 403                break;
 404        case REF_STATUS_REJECT_SHALLOW:
 405                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 406                                 "new shallow roots not allowed",
 407                                 porcelain, summary_width);
 408                break;
 409        case REF_STATUS_REMOTE_REJECT:
 410                print_ref_status('!', "[remote rejected]", ref,
 411                                 ref->deletion ? NULL : ref->peer_ref,
 412                                 ref->remote_status, porcelain, summary_width);
 413                break;
 414        case REF_STATUS_EXPECTING_REPORT:
 415                print_ref_status('!', "[remote failure]", ref,
 416                                 ref->deletion ? NULL : ref->peer_ref,
 417                                 "remote failed to report status",
 418                                 porcelain, summary_width);
 419                break;
 420        case REF_STATUS_ATOMIC_PUSH_FAILED:
 421                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 422                                 "atomic push failed", porcelain, summary_width);
 423                break;
 424        case REF_STATUS_OK:
 425                print_ok_ref_status(ref, porcelain, summary_width);
 426                break;
 427        }
 428
 429        return 1;
 430}
 431
 432void transport_print_push_status(const char *dest, struct ref *refs,
 433                                  int verbose, int porcelain, unsigned int *reject_reasons)
 434{
 435        struct ref *ref;
 436        int n = 0;
 437        unsigned char head_sha1[20];
 438        char *head;
 439        int summary_width = TRANSPORT_SUMMARY_WIDTH;
 440
 441        head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
 442
 443        if (verbose) {
 444                for (ref = refs; ref; ref = ref->next)
 445                        if (ref->status == REF_STATUS_UPTODATE)
 446                                n += print_one_push_status(ref, dest, n,
 447                                                           porcelain, summary_width);
 448        }
 449
 450        for (ref = refs; ref; ref = ref->next)
 451                if (ref->status == REF_STATUS_OK)
 452                        n += print_one_push_status(ref, dest, n,
 453                                                   porcelain, summary_width);
 454
 455        *reject_reasons = 0;
 456        for (ref = refs; ref; ref = ref->next) {
 457                if (ref->status != REF_STATUS_NONE &&
 458                    ref->status != REF_STATUS_UPTODATE &&
 459                    ref->status != REF_STATUS_OK)
 460                        n += print_one_push_status(ref, dest, n,
 461                                                   porcelain, summary_width);
 462                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 463                        if (head != NULL && !strcmp(head, ref->name))
 464                                *reject_reasons |= REJECT_NON_FF_HEAD;
 465                        else
 466                                *reject_reasons |= REJECT_NON_FF_OTHER;
 467                } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 468                        *reject_reasons |= REJECT_ALREADY_EXISTS;
 469                } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 470                        *reject_reasons |= REJECT_FETCH_FIRST;
 471                } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 472                        *reject_reasons |= REJECT_NEEDS_FORCE;
 473                }
 474        }
 475        free(head);
 476}
 477
 478void transport_verify_remote_names(int nr_heads, const char **heads)
 479{
 480        int i;
 481
 482        for (i = 0; i < nr_heads; i++) {
 483                const char *local = heads[i];
 484                const char *remote = strrchr(heads[i], ':');
 485
 486                if (*local == '+')
 487                        local++;
 488
 489                /* A matching refspec is okay.  */
 490                if (remote == local && remote[1] == '\0')
 491                        continue;
 492
 493                remote = remote ? (remote + 1) : local;
 494                if (check_refname_format(remote,
 495                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 496                        die("remote part of refspec is not a valid name in %s",
 497                                heads[i]);
 498        }
 499}
 500
 501static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 502{
 503        struct git_transport_data *data = transport->data;
 504        struct send_pack_args args;
 505        int ret;
 506
 507        if (!data->got_remote_heads) {
 508                struct ref *tmp_refs;
 509                connect_setup(transport, 1);
 510
 511                get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 512                                 NULL, &data->shallow);
 513                data->got_remote_heads = 1;
 514        }
 515
 516        memset(&args, 0, sizeof(args));
 517        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 518        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 519        args.use_thin_pack = data->options.thin;
 520        args.verbose = (transport->verbose > 0);
 521        args.quiet = (transport->verbose < 0);
 522        args.progress = transport->progress;
 523        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 524        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 525        args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 526        args.push_options = transport->push_options;
 527        args.url = transport->url;
 528
 529        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 530                args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 531        else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 532                args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 533        else
 534                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 535
 536        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 537                        &data->extra_have);
 538
 539        close(data->fd[1]);
 540        close(data->fd[0]);
 541        ret |= finish_connect(data->conn);
 542        data->conn = NULL;
 543        data->got_remote_heads = 0;
 544
 545        return ret;
 546}
 547
 548static int connect_git(struct transport *transport, const char *name,
 549                       const char *executable, int fd[2])
 550{
 551        struct git_transport_data *data = transport->data;
 552        data->conn = git_connect(data->fd, transport->url,
 553                                 executable, 0);
 554        fd[0] = data->fd[0];
 555        fd[1] = data->fd[1];
 556        return 0;
 557}
 558
 559static int disconnect_git(struct transport *transport)
 560{
 561        struct git_transport_data *data = transport->data;
 562        if (data->conn) {
 563                if (data->got_remote_heads)
 564                        packet_flush(data->fd[1]);
 565                close(data->fd[0]);
 566                close(data->fd[1]);
 567                finish_connect(data->conn);
 568        }
 569
 570        free(data);
 571        return 0;
 572}
 573
 574void transport_take_over(struct transport *transport,
 575                         struct child_process *child)
 576{
 577        struct git_transport_data *data;
 578
 579        if (!transport->smart_options)
 580                die("BUG: taking over transport requires non-NULL "
 581                    "smart_options field.");
 582
 583        data = xcalloc(1, sizeof(*data));
 584        data->options = *transport->smart_options;
 585        data->conn = child;
 586        data->fd[0] = data->conn->out;
 587        data->fd[1] = data->conn->in;
 588        data->got_remote_heads = 0;
 589        transport->data = data;
 590
 591        transport->set_option = NULL;
 592        transport->get_refs_list = get_refs_via_connect;
 593        transport->fetch = fetch_refs_via_pack;
 594        transport->push = NULL;
 595        transport->push_refs = git_transport_push;
 596        transport->disconnect = disconnect_git;
 597        transport->smart_options = &(data->options);
 598
 599        transport->cannot_reuse = 1;
 600}
 601
 602static int is_file(const char *url)
 603{
 604        struct stat buf;
 605        if (stat(url, &buf))
 606                return 0;
 607        return S_ISREG(buf.st_mode);
 608}
 609
 610static int external_specification_len(const char *url)
 611{
 612        return strchr(url, ':') - url;
 613}
 614
 615static const struct string_list *protocol_whitelist(void)
 616{
 617        static int enabled = -1;
 618        static struct string_list allowed = STRING_LIST_INIT_DUP;
 619
 620        if (enabled < 0) {
 621                const char *v = getenv("GIT_ALLOW_PROTOCOL");
 622                if (v) {
 623                        string_list_split(&allowed, v, ':', -1);
 624                        string_list_sort(&allowed);
 625                        enabled = 1;
 626                } else {
 627                        enabled = 0;
 628                }
 629        }
 630
 631        return enabled ? &allowed : NULL;
 632}
 633
 634int is_transport_allowed(const char *type)
 635{
 636        const struct string_list *allowed = protocol_whitelist();
 637        return !allowed || string_list_has_string(allowed, type);
 638}
 639
 640void transport_check_allowed(const char *type)
 641{
 642        if (!is_transport_allowed(type))
 643                die("transport '%s' not allowed", type);
 644}
 645
 646int transport_restrict_protocols(void)
 647{
 648        return !!protocol_whitelist();
 649}
 650
 651struct transport *transport_get(struct remote *remote, const char *url)
 652{
 653        const char *helper;
 654        struct transport *ret = xcalloc(1, sizeof(*ret));
 655
 656        ret->progress = isatty(2);
 657
 658        if (!remote)
 659                die("No remote provided to transport_get()");
 660
 661        ret->got_remote_refs = 0;
 662        ret->remote = remote;
 663        helper = remote->foreign_vcs;
 664
 665        if (!url && remote->url)
 666                url = remote->url[0];
 667        ret->url = url;
 668
 669        /* maybe it is a foreign URL? */
 670        if (url) {
 671                const char *p = url;
 672
 673                while (is_urlschemechar(p == url, *p))
 674                        p++;
 675                if (starts_with(p, "::"))
 676                        helper = xstrndup(url, p - url);
 677        }
 678
 679        if (helper) {
 680                transport_helper_init(ret, helper);
 681        } else if (starts_with(url, "rsync:")) {
 682                die("git-over-rsync is no longer supported");
 683        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 684                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 685                transport_check_allowed("file");
 686                ret->data = data;
 687                ret->get_refs_list = get_refs_from_bundle;
 688                ret->fetch = fetch_refs_from_bundle;
 689                ret->disconnect = close_bundle;
 690                ret->smart_options = NULL;
 691        } else if (!is_url(url)
 692                || starts_with(url, "file://")
 693                || starts_with(url, "git://")
 694                || starts_with(url, "ssh://")
 695                || starts_with(url, "git+ssh://") /* deprecated - do not use */
 696                || starts_with(url, "ssh+git://") /* deprecated - do not use */
 697                ) {
 698                /*
 699                 * These are builtin smart transports; "allowed" transports
 700                 * will be checked individually in git_connect.
 701                 */
 702                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 703                ret->data = data;
 704                ret->set_option = NULL;
 705                ret->get_refs_list = get_refs_via_connect;
 706                ret->fetch = fetch_refs_via_pack;
 707                ret->push_refs = git_transport_push;
 708                ret->connect = connect_git;
 709                ret->disconnect = disconnect_git;
 710                ret->smart_options = &(data->options);
 711
 712                data->conn = NULL;
 713                data->got_remote_heads = 0;
 714        } else {
 715                /* Unknown protocol in URL. Pass to external handler. */
 716                int len = external_specification_len(url);
 717                char *handler = xmemdupz(url, len);
 718                transport_helper_init(ret, handler);
 719        }
 720
 721        if (ret->smart_options) {
 722                ret->smart_options->thin = 1;
 723                ret->smart_options->uploadpack = "git-upload-pack";
 724                if (remote->uploadpack)
 725                        ret->smart_options->uploadpack = remote->uploadpack;
 726                ret->smart_options->receivepack = "git-receive-pack";
 727                if (remote->receivepack)
 728                        ret->smart_options->receivepack = remote->receivepack;
 729        }
 730
 731        return ret;
 732}
 733
 734int transport_set_option(struct transport *transport,
 735                         const char *name, const char *value)
 736{
 737        int git_reports = 1, protocol_reports = 1;
 738
 739        if (transport->smart_options)
 740                git_reports = set_git_option(transport->smart_options,
 741                                             name, value);
 742
 743        if (transport->set_option)
 744                protocol_reports = transport->set_option(transport, name,
 745                                                        value);
 746
 747        /* If either report is 0, report 0 (success). */
 748        if (!git_reports || !protocol_reports)
 749                return 0;
 750        /* If either reports -1 (invalid value), report -1. */
 751        if ((git_reports == -1) || (protocol_reports == -1))
 752                return -1;
 753        /* Otherwise if both report unknown, report unknown. */
 754        return 1;
 755}
 756
 757void transport_set_verbosity(struct transport *transport, int verbosity,
 758        int force_progress)
 759{
 760        if (verbosity >= 1)
 761                transport->verbose = verbosity <= 3 ? verbosity : 3;
 762        if (verbosity < 0)
 763                transport->verbose = -1;
 764
 765        /**
 766         * Rules used to determine whether to report progress (processing aborts
 767         * when a rule is satisfied):
 768         *
 769         *   . Report progress, if force_progress is 1 (ie. --progress).
 770         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 771         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 772         *   . Report progress if isatty(2) is 1.
 773         **/
 774        if (force_progress >= 0)
 775                transport->progress = !!force_progress;
 776        else
 777                transport->progress = verbosity >= 0 && isatty(2);
 778}
 779
 780static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 781{
 782        int i;
 783
 784        fprintf(stderr, _("The following submodule paths contain changes that can\n"
 785                        "not be found on any remote:\n"));
 786        for (i = 0; i < needs_pushing->nr; i++)
 787                fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
 788        fprintf(stderr, _("\nPlease try\n\n"
 789                          "     git push --recurse-submodules=on-demand\n\n"
 790                          "or cd to the path and use\n\n"
 791                          "     git push\n\n"
 792                          "to push them to a remote.\n\n"));
 793
 794        string_list_clear(needs_pushing, 0);
 795
 796        die(_("Aborting."));
 797}
 798
 799static int run_pre_push_hook(struct transport *transport,
 800                             struct ref *remote_refs)
 801{
 802        int ret = 0, x;
 803        struct ref *r;
 804        struct child_process proc = CHILD_PROCESS_INIT;
 805        struct strbuf buf;
 806        const char *argv[4];
 807
 808        if (!(argv[0] = find_hook("pre-push")))
 809                return 0;
 810
 811        argv[1] = transport->remote->name;
 812        argv[2] = transport->url;
 813        argv[3] = NULL;
 814
 815        proc.argv = argv;
 816        proc.in = -1;
 817
 818        if (start_command(&proc)) {
 819                finish_command(&proc);
 820                return -1;
 821        }
 822
 823        sigchain_push(SIGPIPE, SIG_IGN);
 824
 825        strbuf_init(&buf, 256);
 826
 827        for (r = remote_refs; r; r = r->next) {
 828                if (!r->peer_ref) continue;
 829                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 830                if (r->status == REF_STATUS_REJECT_STALE) continue;
 831                if (r->status == REF_STATUS_UPTODATE) continue;
 832
 833                strbuf_reset(&buf);
 834                strbuf_addf( &buf, "%s %s %s %s\n",
 835                         r->peer_ref->name, oid_to_hex(&r->new_oid),
 836                         r->name, oid_to_hex(&r->old_oid));
 837
 838                if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 839                        /* We do not mind if a hook does not read all refs. */
 840                        if (errno != EPIPE)
 841                                ret = -1;
 842                        break;
 843                }
 844        }
 845
 846        strbuf_release(&buf);
 847
 848        x = close(proc.in);
 849        if (!ret)
 850                ret = x;
 851
 852        sigchain_pop(SIGPIPE);
 853
 854        x = finish_command(&proc);
 855        if (!ret)
 856                ret = x;
 857
 858        return ret;
 859}
 860
 861int transport_push(struct transport *transport,
 862                   int refspec_nr, const char **refspec, int flags,
 863                   unsigned int *reject_reasons)
 864{
 865        *reject_reasons = 0;
 866        transport_verify_remote_names(refspec_nr, refspec);
 867
 868        if (transport->push) {
 869                /* Maybe FIXME. But no important transport uses this case. */
 870                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 871                        die("This transport does not support using --set-upstream");
 872
 873                return transport->push(transport, refspec_nr, refspec, flags);
 874        } else if (transport->push_refs) {
 875                struct ref *remote_refs;
 876                struct ref *local_refs = get_local_heads();
 877                int match_flags = MATCH_REFS_NONE;
 878                int verbose = (transport->verbose > 0);
 879                int quiet = (transport->verbose < 0);
 880                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 881                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 882                int push_ret, ret, err;
 883
 884                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 885                        return -1;
 886
 887                remote_refs = transport->get_refs_list(transport, 1);
 888
 889                if (flags & TRANSPORT_PUSH_ALL)
 890                        match_flags |= MATCH_REFS_ALL;
 891                if (flags & TRANSPORT_PUSH_MIRROR)
 892                        match_flags |= MATCH_REFS_MIRROR;
 893                if (flags & TRANSPORT_PUSH_PRUNE)
 894                        match_flags |= MATCH_REFS_PRUNE;
 895                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
 896                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
 897
 898                if (match_push_refs(local_refs, &remote_refs,
 899                                    refspec_nr, refspec, match_flags)) {
 900                        return -1;
 901                }
 902
 903                if (transport->smart_options &&
 904                    transport->smart_options->cas &&
 905                    !is_empty_cas(transport->smart_options->cas))
 906                        apply_push_cas(transport->smart_options->cas,
 907                                       transport->remote, remote_refs);
 908
 909                set_ref_status_for_push(remote_refs,
 910                        flags & TRANSPORT_PUSH_MIRROR,
 911                        flags & TRANSPORT_PUSH_FORCE);
 912
 913                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
 914                        if (run_pre_push_hook(transport, remote_refs))
 915                                return -1;
 916
 917                if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
 918                        struct ref *ref = remote_refs;
 919                        for (; ref; ref = ref->next)
 920                                if (!is_null_oid(&ref->new_oid) &&
 921                                    !push_unpushed_submodules(ref->new_oid.hash,
 922                                            transport->remote->name))
 923                                    die ("Failed to push all needed submodules!");
 924                }
 925
 926                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
 927                              TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
 928                        struct ref *ref = remote_refs;
 929                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 930
 931                        for (; ref; ref = ref->next)
 932                                if (!is_null_oid(&ref->new_oid) &&
 933                                    find_unpushed_submodules(ref->new_oid.hash,
 934                                            transport->remote->name, &needs_pushing))
 935                                        die_with_unpushed_submodules(&needs_pushing);
 936                }
 937
 938                push_ret = transport->push_refs(transport, remote_refs, flags);
 939                err = push_had_errors(remote_refs);
 940                ret = push_ret | err;
 941
 942                if (!quiet || err)
 943                        transport_print_push_status(transport->url, remote_refs,
 944                                        verbose | porcelain, porcelain,
 945                                        reject_reasons);
 946
 947                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 948                        set_upstreams(transport, remote_refs, pretend);
 949
 950                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 951                        struct ref *ref;
 952                        for (ref = remote_refs; ref; ref = ref->next)
 953                                transport_update_tracking_ref(transport->remote, ref, verbose);
 954                }
 955
 956                if (porcelain && !push_ret)
 957                        puts("Done");
 958                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
 959                        fprintf(stderr, "Everything up-to-date\n");
 960
 961                return ret;
 962        }
 963        return 1;
 964}
 965
 966const struct ref *transport_get_remote_refs(struct transport *transport)
 967{
 968        if (!transport->got_remote_refs) {
 969                transport->remote_refs = transport->get_refs_list(transport, 0);
 970                transport->got_remote_refs = 1;
 971        }
 972
 973        return transport->remote_refs;
 974}
 975
 976int transport_fetch_refs(struct transport *transport, struct ref *refs)
 977{
 978        int rc;
 979        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 980        struct ref **heads = NULL;
 981        struct ref *rm;
 982
 983        for (rm = refs; rm; rm = rm->next) {
 984                nr_refs++;
 985                if (rm->peer_ref &&
 986                    !is_null_oid(&rm->old_oid) &&
 987                    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
 988                        continue;
 989                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 990                heads[nr_heads++] = rm;
 991        }
 992
 993        if (!nr_heads) {
 994                /*
 995                 * When deepening of a shallow repository is requested,
 996                 * then local and remote refs are likely to still be equal.
 997                 * Just feed them all to the fetch method in that case.
 998                 * This condition shouldn't be met in a non-deepening fetch
 999                 * (see builtin/fetch.c:quickfetch()).
1000                 */
1001                ALLOC_ARRAY(heads, nr_refs);
1002                for (rm = refs; rm; rm = rm->next)
1003                        heads[nr_heads++] = rm;
1004        }
1005
1006        rc = transport->fetch(transport, nr_heads, heads);
1007
1008        free(heads);
1009        return rc;
1010}
1011
1012void transport_unlock_pack(struct transport *transport)
1013{
1014        if (transport->pack_lockfile) {
1015                unlink_or_warn(transport->pack_lockfile);
1016                free(transport->pack_lockfile);
1017                transport->pack_lockfile = NULL;
1018        }
1019}
1020
1021int transport_connect(struct transport *transport, const char *name,
1022                      const char *exec, int fd[2])
1023{
1024        if (transport->connect)
1025                return transport->connect(transport, name, exec, fd);
1026        else
1027                die("Operation not supported by protocol");
1028}
1029
1030int transport_disconnect(struct transport *transport)
1031{
1032        int ret = 0;
1033        if (transport->disconnect)
1034                ret = transport->disconnect(transport);
1035        free(transport);
1036        return ret;
1037}
1038
1039/*
1040 * Strip username (and password) from a URL and return
1041 * it in a newly allocated string.
1042 */
1043char *transport_anonymize_url(const char *url)
1044{
1045        char *scheme_prefix, *anon_part;
1046        size_t anon_len, prefix_len = 0;
1047
1048        anon_part = strchr(url, '@');
1049        if (url_is_local_not_ssh(url) || !anon_part)
1050                goto literal_copy;
1051
1052        anon_len = strlen(++anon_part);
1053        scheme_prefix = strstr(url, "://");
1054        if (!scheme_prefix) {
1055                if (!strchr(anon_part, ':'))
1056                        /* cannot be "me@there:/path/name" */
1057                        goto literal_copy;
1058        } else {
1059                const char *cp;
1060                /* make sure scheme is reasonable */
1061                for (cp = url; cp < scheme_prefix; cp++) {
1062                        switch (*cp) {
1063                                /* RFC 1738 2.1 */
1064                        case '+': case '.': case '-':
1065                                break; /* ok */
1066                        default:
1067                                if (isalnum(*cp))
1068                                        break;
1069                                /* it isn't */
1070                                goto literal_copy;
1071                        }
1072                }
1073                /* @ past the first slash does not count */
1074                cp = strchr(scheme_prefix + 3, '/');
1075                if (cp && cp < anon_part)
1076                        goto literal_copy;
1077                prefix_len = scheme_prefix - url + 3;
1078        }
1079        return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1080                       (int)anon_len, anon_part);
1081literal_copy:
1082        return xstrdup(url);
1083}
1084
1085struct alternate_refs_data {
1086        alternate_ref_fn *fn;
1087        void *data;
1088};
1089
1090static int refs_from_alternate_cb(struct alternate_object_database *e,
1091                                  void *data)
1092{
1093        char *other;
1094        size_t len;
1095        struct remote *remote;
1096        struct transport *transport;
1097        const struct ref *extra;
1098        struct alternate_refs_data *cb = data;
1099
1100        e->name[-1] = '\0';
1101        other = xstrdup(real_path(e->base));
1102        e->name[-1] = '/';
1103        len = strlen(other);
1104
1105        while (other[len-1] == '/')
1106                other[--len] = '\0';
1107        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1108                goto out;
1109        /* Is this a git repository with refs? */
1110        memcpy(other + len - 8, "/refs", 6);
1111        if (!is_directory(other))
1112                goto out;
1113        other[len - 8] = '\0';
1114        remote = remote_get(other);
1115        transport = transport_get(remote, other);
1116        for (extra = transport_get_remote_refs(transport);
1117             extra;
1118             extra = extra->next)
1119                cb->fn(extra, cb->data);
1120        transport_disconnect(transport);
1121out:
1122        free(other);
1123        return 0;
1124}
1125
1126void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1127{
1128        struct alternate_refs_data cb;
1129        cb.fn = fn;
1130        cb.data = data;
1131        foreach_alt_odb(refs_from_alternate_cb, &cb);
1132}