Andrew's git / gitweb.git / transport.c
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transport.con commit diff: convert flags to be stored in bitfields (02f2f56)
   1#include "cache.h"
   2#include "config.h"
   3#include "transport.h"
   4#include "run-command.h"
   5#include "pkt-line.h"
   6#include "fetch-pack.h"
   7#include "remote.h"
   8#include "connect.h"
   9#include "send-pack.h"
  10#include "walker.h"
  11#include "bundle.h"
  12#include "dir.h"
  13#include "refs.h"
  14#include "branch.h"
  15#include "url.h"
  16#include "submodule.h"
  17#include "string-list.h"
  18#include "sha1-array.h"
  19#include "sigchain.h"
  20
  21static void set_upstreams(struct transport *transport, struct ref *refs,
  22        int pretend)
  23{
  24        struct ref *ref;
  25        for (ref = refs; ref; ref = ref->next) {
  26                const char *localname;
  27                const char *tmp;
  28                const char *remotename;
  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                                         NULL, &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                oidcpy(&ref->old_oid, &e->oid);
  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 oid_array extra_have;
 120        struct oid_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        } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 158                opts->deepen_not = (const struct string_list *)value;
 159                return 0;
 160        } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 161                opts->deepen_relative = !!value;
 162                return 0;
 163        }
 164        return 1;
 165}
 166
 167static int connect_setup(struct transport *transport, int for_push)
 168{
 169        struct git_transport_data *data = transport->data;
 170        int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 171
 172        if (data->conn)
 173                return 0;
 174
 175        switch (transport->family) {
 176        case TRANSPORT_FAMILY_ALL: break;
 177        case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 178        case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 179        }
 180
 181        data->conn = git_connect(data->fd, transport->url,
 182                                 for_push ? data->options.receivepack :
 183                                 data->options.uploadpack,
 184                                 flags);
 185
 186        return 0;
 187}
 188
 189static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 190{
 191        struct git_transport_data *data = transport->data;
 192        struct ref *refs;
 193
 194        connect_setup(transport, for_push);
 195        get_remote_heads(data->fd[0], NULL, 0, &refs,
 196                         for_push ? REF_NORMAL : 0,
 197                         &data->extra_have,
 198                         &data->shallow);
 199        data->got_remote_heads = 1;
 200
 201        return refs;
 202}
 203
 204static int fetch_refs_via_pack(struct transport *transport,
 205                               int nr_heads, struct ref **to_fetch)
 206{
 207        int ret = 0;
 208        struct git_transport_data *data = transport->data;
 209        struct ref *refs;
 210        char *dest = xstrdup(transport->url);
 211        struct fetch_pack_args args;
 212        struct ref *refs_tmp = NULL;
 213
 214        memset(&args, 0, sizeof(args));
 215        args.uploadpack = data->options.uploadpack;
 216        args.keep_pack = data->options.keep;
 217        args.lock_pack = 1;
 218        args.use_thin_pack = data->options.thin;
 219        args.include_tag = data->options.followtags;
 220        args.verbose = (transport->verbose > 1);
 221        args.quiet = (transport->verbose < 0);
 222        args.no_progress = !transport->progress;
 223        args.depth = data->options.depth;
 224        args.deepen_since = data->options.deepen_since;
 225        args.deepen_not = data->options.deepen_not;
 226        args.deepen_relative = data->options.deepen_relative;
 227        args.check_self_contained_and_connected =
 228                data->options.check_self_contained_and_connected;
 229        args.cloning = transport->cloning;
 230        args.update_shallow = data->options.update_shallow;
 231
 232        if (!data->got_remote_heads) {
 233                connect_setup(transport, 0);
 234                get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 235                                 NULL, &data->shallow);
 236                data->got_remote_heads = 1;
 237        }
 238
 239        refs = fetch_pack(&args, data->fd, data->conn,
 240                          refs_tmp ? refs_tmp : transport->remote_refs,
 241                          dest, to_fetch, nr_heads, &data->shallow,
 242                          &transport->pack_lockfile);
 243        close(data->fd[0]);
 244        close(data->fd[1]);
 245        if (finish_connect(data->conn))
 246                ret = -1;
 247        data->conn = NULL;
 248        data->got_remote_heads = 0;
 249        data->options.self_contained_and_connected =
 250                args.self_contained_and_connected;
 251
 252        if (refs == NULL)
 253                ret = -1;
 254        if (report_unmatched_refs(to_fetch, nr_heads))
 255                ret = -1;
 256
 257        free_refs(refs_tmp);
 258        free_refs(refs);
 259        free(dest);
 260        return ret;
 261}
 262
 263static int push_had_errors(struct ref *ref)
 264{
 265        for (; ref; ref = ref->next) {
 266                switch (ref->status) {
 267                case REF_STATUS_NONE:
 268                case REF_STATUS_UPTODATE:
 269                case REF_STATUS_OK:
 270                        break;
 271                default:
 272                        return 1;
 273                }
 274        }
 275        return 0;
 276}
 277
 278int transport_refs_pushed(struct ref *ref)
 279{
 280        for (; ref; ref = ref->next) {
 281                switch(ref->status) {
 282                case REF_STATUS_NONE:
 283                case REF_STATUS_UPTODATE:
 284                        break;
 285                default:
 286                        return 1;
 287                }
 288        }
 289        return 0;
 290}
 291
 292void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 293{
 294        struct refspec rs;
 295
 296        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 297                return;
 298
 299        rs.src = ref->name;
 300        rs.dst = NULL;
 301
 302        if (!remote_find_tracking(remote, &rs)) {
 303                if (verbose)
 304                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 305                if (ref->deletion) {
 306                        delete_ref(NULL, rs.dst, NULL, 0);
 307                } else
 308                        update_ref("update by push", rs.dst,
 309                                        ref->new_oid.hash, NULL, 0, 0);
 310                free(rs.dst);
 311        }
 312}
 313
 314static void print_ref_status(char flag, const char *summary,
 315                             struct ref *to, struct ref *from, const char *msg,
 316                             int porcelain, int summary_width)
 317{
 318        if (porcelain) {
 319                if (from)
 320                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 321                else
 322                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 323                if (msg)
 324                        fprintf(stdout, "%s (%s)\n", summary, msg);
 325                else
 326                        fprintf(stdout, "%s\n", summary);
 327        } else {
 328                fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
 329                if (from)
 330                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 331                else
 332                        fputs(prettify_refname(to->name), stderr);
 333                if (msg) {
 334                        fputs(" (", stderr);
 335                        fputs(msg, stderr);
 336                        fputc(')', stderr);
 337                }
 338                fputc('\n', stderr);
 339        }
 340}
 341
 342static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
 343{
 344        if (ref->deletion)
 345                print_ref_status('-', "[deleted]", ref, NULL, NULL,
 346                                 porcelain, summary_width);
 347        else if (is_null_oid(&ref->old_oid))
 348                print_ref_status('*',
 349                        (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 350                        "[new branch]"),
 351                        ref, ref->peer_ref, NULL, porcelain, summary_width);
 352        else {
 353                struct strbuf quickref = STRBUF_INIT;
 354                char type;
 355                const char *msg;
 356
 357                strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
 358                                         DEFAULT_ABBREV);
 359                if (ref->forced_update) {
 360                        strbuf_addstr(&quickref, "...");
 361                        type = '+';
 362                        msg = "forced update";
 363                } else {
 364                        strbuf_addstr(&quickref, "..");
 365                        type = ' ';
 366                        msg = NULL;
 367                }
 368                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
 369                                         DEFAULT_ABBREV);
 370
 371                print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 372                                 porcelain, summary_width);
 373                strbuf_release(&quickref);
 374        }
 375}
 376
 377static int print_one_push_status(struct ref *ref, const char *dest, int count,
 378                                 int porcelain, int summary_width)
 379{
 380        if (!count) {
 381                char *url = transport_anonymize_url(dest);
 382                fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 383                free(url);
 384        }
 385
 386        switch(ref->status) {
 387        case REF_STATUS_NONE:
 388                print_ref_status('X', "[no match]", ref, NULL, NULL,
 389                                 porcelain, summary_width);
 390                break;
 391        case REF_STATUS_REJECT_NODELETE:
 392                print_ref_status('!', "[rejected]", ref, NULL,
 393                                 "remote does not support deleting refs",
 394                                 porcelain, summary_width);
 395                break;
 396        case REF_STATUS_UPTODATE:
 397                print_ref_status('=', "[up to date]", ref,
 398                                 ref->peer_ref, NULL, porcelain, summary_width);
 399                break;
 400        case REF_STATUS_REJECT_NONFASTFORWARD:
 401                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 402                                 "non-fast-forward", porcelain, summary_width);
 403                break;
 404        case REF_STATUS_REJECT_ALREADY_EXISTS:
 405                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 406                                 "already exists", porcelain, summary_width);
 407                break;
 408        case REF_STATUS_REJECT_FETCH_FIRST:
 409                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 410                                 "fetch first", porcelain, summary_width);
 411                break;
 412        case REF_STATUS_REJECT_NEEDS_FORCE:
 413                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 414                                 "needs force", porcelain, summary_width);
 415                break;
 416        case REF_STATUS_REJECT_STALE:
 417                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 418                                 "stale info", porcelain, summary_width);
 419                break;
 420        case REF_STATUS_REJECT_SHALLOW:
 421                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 422                                 "new shallow roots not allowed",
 423                                 porcelain, summary_width);
 424                break;
 425        case REF_STATUS_REMOTE_REJECT:
 426                print_ref_status('!', "[remote rejected]", ref,
 427                                 ref->deletion ? NULL : ref->peer_ref,
 428                                 ref->remote_status, porcelain, summary_width);
 429                break;
 430        case REF_STATUS_EXPECTING_REPORT:
 431                print_ref_status('!', "[remote failure]", ref,
 432                                 ref->deletion ? NULL : ref->peer_ref,
 433                                 "remote failed to report status",
 434                                 porcelain, summary_width);
 435                break;
 436        case REF_STATUS_ATOMIC_PUSH_FAILED:
 437                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 438                                 "atomic push failed", porcelain, summary_width);
 439                break;
 440        case REF_STATUS_OK:
 441                print_ok_ref_status(ref, porcelain, summary_width);
 442                break;
 443        }
 444
 445        return 1;
 446}
 447
 448static int measure_abbrev(const struct object_id *oid, int sofar)
 449{
 450        char hex[GIT_MAX_HEXSZ + 1];
 451        int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
 452
 453        return (w < sofar) ? sofar : w;
 454}
 455
 456int transport_summary_width(const struct ref *refs)
 457{
 458        int maxw = -1;
 459
 460        for (; refs; refs = refs->next) {
 461                maxw = measure_abbrev(&refs->old_oid, maxw);
 462                maxw = measure_abbrev(&refs->new_oid, maxw);
 463        }
 464        if (maxw < 0)
 465                maxw = FALLBACK_DEFAULT_ABBREV;
 466        return (2 * maxw + 3);
 467}
 468
 469void transport_print_push_status(const char *dest, struct ref *refs,
 470                                  int verbose, int porcelain, unsigned int *reject_reasons)
 471{
 472        struct ref *ref;
 473        int n = 0;
 474        char *head;
 475        int summary_width = transport_summary_width(refs);
 476
 477        head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 478
 479        if (verbose) {
 480                for (ref = refs; ref; ref = ref->next)
 481                        if (ref->status == REF_STATUS_UPTODATE)
 482                                n += print_one_push_status(ref, dest, n,
 483                                                           porcelain, summary_width);
 484        }
 485
 486        for (ref = refs; ref; ref = ref->next)
 487                if (ref->status == REF_STATUS_OK)
 488                        n += print_one_push_status(ref, dest, n,
 489                                                   porcelain, summary_width);
 490
 491        *reject_reasons = 0;
 492        for (ref = refs; ref; ref = ref->next) {
 493                if (ref->status != REF_STATUS_NONE &&
 494                    ref->status != REF_STATUS_UPTODATE &&
 495                    ref->status != REF_STATUS_OK)
 496                        n += print_one_push_status(ref, dest, n,
 497                                                   porcelain, summary_width);
 498                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 499                        if (head != NULL && !strcmp(head, ref->name))
 500                                *reject_reasons |= REJECT_NON_FF_HEAD;
 501                        else
 502                                *reject_reasons |= REJECT_NON_FF_OTHER;
 503                } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 504                        *reject_reasons |= REJECT_ALREADY_EXISTS;
 505                } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 506                        *reject_reasons |= REJECT_FETCH_FIRST;
 507                } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 508                        *reject_reasons |= REJECT_NEEDS_FORCE;
 509                }
 510        }
 511        free(head);
 512}
 513
 514void transport_verify_remote_names(int nr_heads, const char **heads)
 515{
 516        int i;
 517
 518        for (i = 0; i < nr_heads; i++) {
 519                const char *local = heads[i];
 520                const char *remote = strrchr(heads[i], ':');
 521
 522                if (*local == '+')
 523                        local++;
 524
 525                /* A matching refspec is okay.  */
 526                if (remote == local && remote[1] == '\0')
 527                        continue;
 528
 529                remote = remote ? (remote + 1) : local;
 530                if (check_refname_format(remote,
 531                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 532                        die("remote part of refspec is not a valid name in %s",
 533                                heads[i]);
 534        }
 535}
 536
 537static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 538{
 539        struct git_transport_data *data = transport->data;
 540        struct send_pack_args args;
 541        int ret;
 542
 543        if (!data->got_remote_heads) {
 544                struct ref *tmp_refs;
 545                connect_setup(transport, 1);
 546
 547                get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 548                                 NULL, &data->shallow);
 549                data->got_remote_heads = 1;
 550        }
 551
 552        memset(&args, 0, sizeof(args));
 553        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 554        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 555        args.use_thin_pack = data->options.thin;
 556        args.verbose = (transport->verbose > 0);
 557        args.quiet = (transport->verbose < 0);
 558        args.progress = transport->progress;
 559        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 560        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 561        args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 562        args.push_options = transport->push_options;
 563        args.url = transport->url;
 564
 565        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 566                args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 567        else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 568                args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 569        else
 570                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 571
 572        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 573                        &data->extra_have);
 574
 575        close(data->fd[1]);
 576        close(data->fd[0]);
 577        ret |= finish_connect(data->conn);
 578        data->conn = NULL;
 579        data->got_remote_heads = 0;
 580
 581        return ret;
 582}
 583
 584static int connect_git(struct transport *transport, const char *name,
 585                       const char *executable, int fd[2])
 586{
 587        struct git_transport_data *data = transport->data;
 588        data->conn = git_connect(data->fd, transport->url,
 589                                 executable, 0);
 590        fd[0] = data->fd[0];
 591        fd[1] = data->fd[1];
 592        return 0;
 593}
 594
 595static int disconnect_git(struct transport *transport)
 596{
 597        struct git_transport_data *data = transport->data;
 598        if (data->conn) {
 599                if (data->got_remote_heads)
 600                        packet_flush(data->fd[1]);
 601                close(data->fd[0]);
 602                close(data->fd[1]);
 603                finish_connect(data->conn);
 604        }
 605
 606        free(data);
 607        return 0;
 608}
 609
 610void transport_take_over(struct transport *transport,
 611                         struct child_process *child)
 612{
 613        struct git_transport_data *data;
 614
 615        if (!transport->smart_options)
 616                die("BUG: taking over transport requires non-NULL "
 617                    "smart_options field.");
 618
 619        data = xcalloc(1, sizeof(*data));
 620        data->options = *transport->smart_options;
 621        data->conn = child;
 622        data->fd[0] = data->conn->out;
 623        data->fd[1] = data->conn->in;
 624        data->got_remote_heads = 0;
 625        transport->data = data;
 626
 627        transport->set_option = NULL;
 628        transport->get_refs_list = get_refs_via_connect;
 629        transport->fetch = fetch_refs_via_pack;
 630        transport->push = NULL;
 631        transport->push_refs = git_transport_push;
 632        transport->disconnect = disconnect_git;
 633        transport->smart_options = &(data->options);
 634
 635        transport->cannot_reuse = 1;
 636}
 637
 638static int is_file(const char *url)
 639{
 640        struct stat buf;
 641        if (stat(url, &buf))
 642                return 0;
 643        return S_ISREG(buf.st_mode);
 644}
 645
 646static int external_specification_len(const char *url)
 647{
 648        return strchr(url, ':') - url;
 649}
 650
 651static const struct string_list *protocol_whitelist(void)
 652{
 653        static int enabled = -1;
 654        static struct string_list allowed = STRING_LIST_INIT_DUP;
 655
 656        if (enabled < 0) {
 657                const char *v = getenv("GIT_ALLOW_PROTOCOL");
 658                if (v) {
 659                        string_list_split(&allowed, v, ':', -1);
 660                        string_list_sort(&allowed);
 661                        enabled = 1;
 662                } else {
 663                        enabled = 0;
 664                }
 665        }
 666
 667        return enabled ? &allowed : NULL;
 668}
 669
 670enum protocol_allow_config {
 671        PROTOCOL_ALLOW_NEVER = 0,
 672        PROTOCOL_ALLOW_USER_ONLY,
 673        PROTOCOL_ALLOW_ALWAYS
 674};
 675
 676static enum protocol_allow_config parse_protocol_config(const char *key,
 677                                                        const char *value)
 678{
 679        if (!strcasecmp(value, "always"))
 680                return PROTOCOL_ALLOW_ALWAYS;
 681        else if (!strcasecmp(value, "never"))
 682                return PROTOCOL_ALLOW_NEVER;
 683        else if (!strcasecmp(value, "user"))
 684                return PROTOCOL_ALLOW_USER_ONLY;
 685
 686        die("unknown value for config '%s': %s", key, value);
 687}
 688
 689static enum protocol_allow_config get_protocol_config(const char *type)
 690{
 691        char *key = xstrfmt("protocol.%s.allow", type);
 692        char *value;
 693
 694        /* first check the per-protocol config */
 695        if (!git_config_get_string(key, &value)) {
 696                enum protocol_allow_config ret =
 697                        parse_protocol_config(key, value);
 698                free(key);
 699                free(value);
 700                return ret;
 701        }
 702        free(key);
 703
 704        /* if defined, fallback to user-defined default for unknown protocols */
 705        if (!git_config_get_string("protocol.allow", &value)) {
 706                enum protocol_allow_config ret =
 707                        parse_protocol_config("protocol.allow", value);
 708                free(value);
 709                return ret;
 710        }
 711
 712        /* fallback to built-in defaults */
 713        /* known safe */
 714        if (!strcmp(type, "http") ||
 715            !strcmp(type, "https") ||
 716            !strcmp(type, "git") ||
 717            !strcmp(type, "ssh") ||
 718            !strcmp(type, "file"))
 719                return PROTOCOL_ALLOW_ALWAYS;
 720
 721        /* known scary; err on the side of caution */
 722        if (!strcmp(type, "ext"))
 723                return PROTOCOL_ALLOW_NEVER;
 724
 725        /* unknown; by default let them be used only directly by the user */
 726        return PROTOCOL_ALLOW_USER_ONLY;
 727}
 728
 729int is_transport_allowed(const char *type, int from_user)
 730{
 731        const struct string_list *whitelist = protocol_whitelist();
 732        if (whitelist)
 733                return string_list_has_string(whitelist, type);
 734
 735        switch (get_protocol_config(type)) {
 736        case PROTOCOL_ALLOW_ALWAYS:
 737                return 1;
 738        case PROTOCOL_ALLOW_NEVER:
 739                return 0;
 740        case PROTOCOL_ALLOW_USER_ONLY:
 741                if (from_user < 0)
 742                        from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 743                return from_user;
 744        }
 745
 746        die("BUG: invalid protocol_allow_config type");
 747}
 748
 749void transport_check_allowed(const char *type)
 750{
 751        if (!is_transport_allowed(type, -1))
 752                die("transport '%s' not allowed", type);
 753}
 754
 755struct transport *transport_get(struct remote *remote, const char *url)
 756{
 757        const char *helper;
 758        struct transport *ret = xcalloc(1, sizeof(*ret));
 759
 760        ret->progress = isatty(2);
 761
 762        if (!remote)
 763                die("No remote provided to transport_get()");
 764
 765        ret->got_remote_refs = 0;
 766        ret->remote = remote;
 767        helper = remote->foreign_vcs;
 768
 769        if (!url && remote->url)
 770                url = remote->url[0];
 771        ret->url = url;
 772
 773        /* maybe it is a foreign URL? */
 774        if (url) {
 775                const char *p = url;
 776
 777                while (is_urlschemechar(p == url, *p))
 778                        p++;
 779                if (starts_with(p, "::"))
 780                        helper = xstrndup(url, p - url);
 781        }
 782
 783        if (helper) {
 784                transport_helper_init(ret, helper);
 785        } else if (starts_with(url, "rsync:")) {
 786                die("git-over-rsync is no longer supported");
 787        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 788                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 789                transport_check_allowed("file");
 790                ret->data = data;
 791                ret->get_refs_list = get_refs_from_bundle;
 792                ret->fetch = fetch_refs_from_bundle;
 793                ret->disconnect = close_bundle;
 794                ret->smart_options = NULL;
 795        } else if (!is_url(url)
 796                || starts_with(url, "file://")
 797                || starts_with(url, "git://")
 798                || starts_with(url, "ssh://")
 799                || starts_with(url, "git+ssh://") /* deprecated - do not use */
 800                || starts_with(url, "ssh+git://") /* deprecated - do not use */
 801                ) {
 802                /*
 803                 * These are builtin smart transports; "allowed" transports
 804                 * will be checked individually in git_connect.
 805                 */
 806                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 807                ret->data = data;
 808                ret->set_option = NULL;
 809                ret->get_refs_list = get_refs_via_connect;
 810                ret->fetch = fetch_refs_via_pack;
 811                ret->push_refs = git_transport_push;
 812                ret->connect = connect_git;
 813                ret->disconnect = disconnect_git;
 814                ret->smart_options = &(data->options);
 815
 816                data->conn = NULL;
 817                data->got_remote_heads = 0;
 818        } else {
 819                /* Unknown protocol in URL. Pass to external handler. */
 820                int len = external_specification_len(url);
 821                char *handler = xmemdupz(url, len);
 822                transport_helper_init(ret, handler);
 823        }
 824
 825        if (ret->smart_options) {
 826                ret->smart_options->thin = 1;
 827                ret->smart_options->uploadpack = "git-upload-pack";
 828                if (remote->uploadpack)
 829                        ret->smart_options->uploadpack = remote->uploadpack;
 830                ret->smart_options->receivepack = "git-receive-pack";
 831                if (remote->receivepack)
 832                        ret->smart_options->receivepack = remote->receivepack;
 833        }
 834
 835        return ret;
 836}
 837
 838int transport_set_option(struct transport *transport,
 839                         const char *name, const char *value)
 840{
 841        int git_reports = 1, protocol_reports = 1;
 842
 843        if (transport->smart_options)
 844                git_reports = set_git_option(transport->smart_options,
 845                                             name, value);
 846
 847        if (transport->set_option)
 848                protocol_reports = transport->set_option(transport, name,
 849                                                        value);
 850
 851        /* If either report is 0, report 0 (success). */
 852        if (!git_reports || !protocol_reports)
 853                return 0;
 854        /* If either reports -1 (invalid value), report -1. */
 855        if ((git_reports == -1) || (protocol_reports == -1))
 856                return -1;
 857        /* Otherwise if both report unknown, report unknown. */
 858        return 1;
 859}
 860
 861void transport_set_verbosity(struct transport *transport, int verbosity,
 862        int force_progress)
 863{
 864        if (verbosity >= 1)
 865                transport->verbose = verbosity <= 3 ? verbosity : 3;
 866        if (verbosity < 0)
 867                transport->verbose = -1;
 868
 869        /**
 870         * Rules used to determine whether to report progress (processing aborts
 871         * when a rule is satisfied):
 872         *
 873         *   . Report progress, if force_progress is 1 (ie. --progress).
 874         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 875         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 876         *   . Report progress if isatty(2) is 1.
 877         **/
 878        if (force_progress >= 0)
 879                transport->progress = !!force_progress;
 880        else
 881                transport->progress = verbosity >= 0 && isatty(2);
 882}
 883
 884static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 885{
 886        int i;
 887
 888        fprintf(stderr, _("The following submodule paths contain changes that can\n"
 889                        "not be found on any remote:\n"));
 890        for (i = 0; i < needs_pushing->nr; i++)
 891                fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
 892        fprintf(stderr, _("\nPlease try\n\n"
 893                          "     git push --recurse-submodules=on-demand\n\n"
 894                          "or cd to the path and use\n\n"
 895                          "     git push\n\n"
 896                          "to push them to a remote.\n\n"));
 897
 898        string_list_clear(needs_pushing, 0);
 899
 900        die(_("Aborting."));
 901}
 902
 903static int run_pre_push_hook(struct transport *transport,
 904                             struct ref *remote_refs)
 905{
 906        int ret = 0, x;
 907        struct ref *r;
 908        struct child_process proc = CHILD_PROCESS_INIT;
 909        struct strbuf buf;
 910        const char *argv[4];
 911
 912        if (!(argv[0] = find_hook("pre-push")))
 913                return 0;
 914
 915        argv[1] = transport->remote->name;
 916        argv[2] = transport->url;
 917        argv[3] = NULL;
 918
 919        proc.argv = argv;
 920        proc.in = -1;
 921
 922        if (start_command(&proc)) {
 923                finish_command(&proc);
 924                return -1;
 925        }
 926
 927        sigchain_push(SIGPIPE, SIG_IGN);
 928
 929        strbuf_init(&buf, 256);
 930
 931        for (r = remote_refs; r; r = r->next) {
 932                if (!r->peer_ref) continue;
 933                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 934                if (r->status == REF_STATUS_REJECT_STALE) continue;
 935                if (r->status == REF_STATUS_UPTODATE) continue;
 936
 937                strbuf_reset(&buf);
 938                strbuf_addf( &buf, "%s %s %s %s\n",
 939                         r->peer_ref->name, oid_to_hex(&r->new_oid),
 940                         r->name, oid_to_hex(&r->old_oid));
 941
 942                if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 943                        /* We do not mind if a hook does not read all refs. */
 944                        if (errno != EPIPE)
 945                                ret = -1;
 946                        break;
 947                }
 948        }
 949
 950        strbuf_release(&buf);
 951
 952        x = close(proc.in);
 953        if (!ret)
 954                ret = x;
 955
 956        sigchain_pop(SIGPIPE);
 957
 958        x = finish_command(&proc);
 959        if (!ret)
 960                ret = x;
 961
 962        return ret;
 963}
 964
 965int transport_push(struct transport *transport,
 966                   int refspec_nr, const char **refspec, int flags,
 967                   unsigned int *reject_reasons)
 968{
 969        *reject_reasons = 0;
 970        transport_verify_remote_names(refspec_nr, refspec);
 971
 972        if (transport->push) {
 973                /* Maybe FIXME. But no important transport uses this case. */
 974                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 975                        die("This transport does not support using --set-upstream");
 976
 977                return transport->push(transport, refspec_nr, refspec, flags);
 978        } else if (transport->push_refs) {
 979                struct ref *remote_refs;
 980                struct ref *local_refs = get_local_heads();
 981                int match_flags = MATCH_REFS_NONE;
 982                int verbose = (transport->verbose > 0);
 983                int quiet = (transport->verbose < 0);
 984                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 985                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 986                int push_ret, ret, err;
 987
 988                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 989                        return -1;
 990
 991                remote_refs = transport->get_refs_list(transport, 1);
 992
 993                if (flags & TRANSPORT_PUSH_ALL)
 994                        match_flags |= MATCH_REFS_ALL;
 995                if (flags & TRANSPORT_PUSH_MIRROR)
 996                        match_flags |= MATCH_REFS_MIRROR;
 997                if (flags & TRANSPORT_PUSH_PRUNE)
 998                        match_flags |= MATCH_REFS_PRUNE;
 999                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1000                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
1001
1002                if (match_push_refs(local_refs, &remote_refs,
1003                                    refspec_nr, refspec, match_flags)) {
1004                        return -1;
1005                }
1006
1007                if (transport->smart_options &&
1008                    transport->smart_options->cas &&
1009                    !is_empty_cas(transport->smart_options->cas))
1010                        apply_push_cas(transport->smart_options->cas,
1011                                       transport->remote, remote_refs);
1012
1013                set_ref_status_for_push(remote_refs,
1014                        flags & TRANSPORT_PUSH_MIRROR,
1015                        flags & TRANSPORT_PUSH_FORCE);
1016
1017                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1018                        if (run_pre_push_hook(transport, remote_refs))
1019                                return -1;
1020
1021                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1022                              TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1023                    !is_bare_repository()) {
1024                        struct ref *ref = remote_refs;
1025                        struct oid_array commits = OID_ARRAY_INIT;
1026
1027                        for (; ref; ref = ref->next)
1028                                if (!is_null_oid(&ref->new_oid))
1029                                        oid_array_append(&commits,
1030                                                          &ref->new_oid);
1031
1032                        if (!push_unpushed_submodules(&commits,
1033                                                      transport->remote,
1034                                                      refspec, refspec_nr,
1035                                                      transport->push_options,
1036                                                      pretend)) {
1037                                oid_array_clear(&commits);
1038                                die("Failed to push all needed submodules!");
1039                        }
1040                        oid_array_clear(&commits);
1041                }
1042
1043                if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1044                     ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1045                                TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1046                      !pretend)) && !is_bare_repository()) {
1047                        struct ref *ref = remote_refs;
1048                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1049                        struct oid_array commits = OID_ARRAY_INIT;
1050
1051                        for (; ref; ref = ref->next)
1052                                if (!is_null_oid(&ref->new_oid))
1053                                        oid_array_append(&commits,
1054                                                          &ref->new_oid);
1055
1056                        if (find_unpushed_submodules(&commits, transport->remote->name,
1057                                                &needs_pushing)) {
1058                                oid_array_clear(&commits);
1059                                die_with_unpushed_submodules(&needs_pushing);
1060                        }
1061                        string_list_clear(&needs_pushing, 0);
1062                        oid_array_clear(&commits);
1063                }
1064
1065                if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1066                        push_ret = transport->push_refs(transport, remote_refs, flags);
1067                else
1068                        push_ret = 0;
1069                err = push_had_errors(remote_refs);
1070                ret = push_ret | err;
1071
1072                if (!quiet || err)
1073                        transport_print_push_status(transport->url, remote_refs,
1074                                        verbose | porcelain, porcelain,
1075                                        reject_reasons);
1076
1077                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1078                        set_upstreams(transport, remote_refs, pretend);
1079
1080                if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1081                               TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1082                        struct ref *ref;
1083                        for (ref = remote_refs; ref; ref = ref->next)
1084                                transport_update_tracking_ref(transport->remote, ref, verbose);
1085                }
1086
1087                if (porcelain && !push_ret)
1088                        puts("Done");
1089                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1090                        fprintf(stderr, "Everything up-to-date\n");
1091
1092                return ret;
1093        }
1094        return 1;
1095}
1096
1097const struct ref *transport_get_remote_refs(struct transport *transport)
1098{
1099        if (!transport->got_remote_refs) {
1100                transport->remote_refs = transport->get_refs_list(transport, 0);
1101                transport->got_remote_refs = 1;
1102        }
1103
1104        return transport->remote_refs;
1105}
1106
1107int transport_fetch_refs(struct transport *transport, struct ref *refs)
1108{
1109        int rc;
1110        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1111        struct ref **heads = NULL;
1112        struct ref *rm;
1113
1114        for (rm = refs; rm; rm = rm->next) {
1115                nr_refs++;
1116                if (rm->peer_ref &&
1117                    !is_null_oid(&rm->old_oid) &&
1118                    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1119                        continue;
1120                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1121                heads[nr_heads++] = rm;
1122        }
1123
1124        if (!nr_heads) {
1125                /*
1126                 * When deepening of a shallow repository is requested,
1127                 * then local and remote refs are likely to still be equal.
1128                 * Just feed them all to the fetch method in that case.
1129                 * This condition shouldn't be met in a non-deepening fetch
1130                 * (see builtin/fetch.c:quickfetch()).
1131                 */
1132                ALLOC_ARRAY(heads, nr_refs);
1133                for (rm = refs; rm; rm = rm->next)
1134                        heads[nr_heads++] = rm;
1135        }
1136
1137        rc = transport->fetch(transport, nr_heads, heads);
1138
1139        free(heads);
1140        return rc;
1141}
1142
1143void transport_unlock_pack(struct transport *transport)
1144{
1145        if (transport->pack_lockfile) {
1146                unlink_or_warn(transport->pack_lockfile);
1147                FREE_AND_NULL(transport->pack_lockfile);
1148        }
1149}
1150
1151int transport_connect(struct transport *transport, const char *name,
1152                      const char *exec, int fd[2])
1153{
1154        if (transport->connect)
1155                return transport->connect(transport, name, exec, fd);
1156        else
1157                die("Operation not supported by protocol");
1158}
1159
1160int transport_disconnect(struct transport *transport)
1161{
1162        int ret = 0;
1163        if (transport->disconnect)
1164                ret = transport->disconnect(transport);
1165        free(transport);
1166        return ret;
1167}
1168
1169/*
1170 * Strip username (and password) from a URL and return
1171 * it in a newly allocated string.
1172 */
1173char *transport_anonymize_url(const char *url)
1174{
1175        char *scheme_prefix, *anon_part;
1176        size_t anon_len, prefix_len = 0;
1177
1178        anon_part = strchr(url, '@');
1179        if (url_is_local_not_ssh(url) || !anon_part)
1180                goto literal_copy;
1181
1182        anon_len = strlen(++anon_part);
1183        scheme_prefix = strstr(url, "://");
1184        if (!scheme_prefix) {
1185                if (!strchr(anon_part, ':'))
1186                        /* cannot be "me@there:/path/name" */
1187                        goto literal_copy;
1188        } else {
1189                const char *cp;
1190                /* make sure scheme is reasonable */
1191                for (cp = url; cp < scheme_prefix; cp++) {
1192                        switch (*cp) {
1193                                /* RFC 1738 2.1 */
1194                        case '+': case '.': case '-':
1195                                break; /* ok */
1196                        default:
1197                                if (isalnum(*cp))
1198                                        break;
1199                                /* it isn't */
1200                                goto literal_copy;
1201                        }
1202                }
1203                /* @ past the first slash does not count */
1204                cp = strchr(scheme_prefix + 3, '/');
1205                if (cp && cp < anon_part)
1206                        goto literal_copy;
1207                prefix_len = scheme_prefix - url + 3;
1208        }
1209        return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1210                       (int)anon_len, anon_part);
1211literal_copy:
1212        return xstrdup(url);
1213}
1214
1215static void read_alternate_refs(const char *path,
1216                                alternate_ref_fn *cb,
1217                                void *data)
1218{
1219        struct child_process cmd = CHILD_PROCESS_INIT;
1220        struct strbuf line = STRBUF_INIT;
1221        FILE *fh;
1222
1223        cmd.git_cmd = 1;
1224        argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1225        argv_array_push(&cmd.args, "for-each-ref");
1226        argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1227        cmd.env = local_repo_env;
1228        cmd.out = -1;
1229
1230        if (start_command(&cmd))
1231                return;
1232
1233        fh = xfdopen(cmd.out, "r");
1234        while (strbuf_getline_lf(&line, fh) != EOF) {
1235                struct object_id oid;
1236
1237                if (get_oid_hex(line.buf, &oid) ||
1238                    line.buf[GIT_SHA1_HEXSZ] != ' ') {
1239                        warning("invalid line while parsing alternate refs: %s",
1240                                line.buf);
1241                        break;
1242                }
1243
1244                cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1245        }
1246
1247        fclose(fh);
1248        finish_command(&cmd);
1249}
1250
1251struct alternate_refs_data {
1252        alternate_ref_fn *fn;
1253        void *data;
1254};
1255
1256static int refs_from_alternate_cb(struct alternate_object_database *e,
1257                                  void *data)
1258{
1259        struct strbuf path = STRBUF_INIT;
1260        size_t base_len;
1261        struct alternate_refs_data *cb = data;
1262
1263        if (!strbuf_realpath(&path, e->path, 0))
1264                goto out;
1265        if (!strbuf_strip_suffix(&path, "/objects"))
1266                goto out;
1267        base_len = path.len;
1268
1269        /* Is this a git repository with refs? */
1270        strbuf_addstr(&path, "/refs");
1271        if (!is_directory(path.buf))
1272                goto out;
1273        strbuf_setlen(&path, base_len);
1274
1275        read_alternate_refs(path.buf, cb->fn, cb->data);
1276
1277out:
1278        strbuf_release(&path);
1279        return 0;
1280}
1281
1282void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1283{
1284        struct alternate_refs_data cb;
1285        cb.fn = fn;
1286        cb.data = data;
1287        foreach_alt_odb(refs_from_alternate_cb, &cb);
1288}