transport.con commit Merge branch 'sb/status-doc-fix' into maint (e092248)
   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#include "transport-internal.h"
  21
  22static void set_upstreams(struct transport *transport, struct ref *refs,
  23        int pretend)
  24{
  25        struct ref *ref;
  26        for (ref = refs; ref; ref = ref->next) {
  27                const char *localname;
  28                const char *tmp;
  29                const char *remotename;
  30                int flag = 0;
  31                /*
  32                 * Check suitability for tracking. Must be successful /
  33                 * already up-to-date ref create/modify (not delete).
  34                 */
  35                if (ref->status != REF_STATUS_OK &&
  36                        ref->status != REF_STATUS_UPTODATE)
  37                        continue;
  38                if (!ref->peer_ref)
  39                        continue;
  40                if (is_null_oid(&ref->new_oid))
  41                        continue;
  42
  43                /* Follow symbolic refs (mainly for HEAD). */
  44                localname = ref->peer_ref->name;
  45                remotename = ref->name;
  46                tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
  47                                         NULL, &flag);
  48                if (tmp && flag & REF_ISSYMREF &&
  49                        starts_with(tmp, "refs/heads/"))
  50                        localname = tmp;
  51
  52                /* Both source and destination must be local branches. */
  53                if (!localname || !starts_with(localname, "refs/heads/"))
  54                        continue;
  55                if (!remotename || !starts_with(remotename, "refs/heads/"))
  56                        continue;
  57
  58                if (!pretend)
  59                        install_branch_config(BRANCH_CONFIG_VERBOSE,
  60                                localname + 11, transport->remote->name,
  61                                remotename);
  62                else
  63                        printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
  64                                localname + 11, remotename + 11,
  65                                transport->remote->name);
  66        }
  67}
  68
  69struct bundle_transport_data {
  70        int fd;
  71        struct bundle_header header;
  72};
  73
  74static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
  75{
  76        struct bundle_transport_data *data = transport->data;
  77        struct ref *result = NULL;
  78        int i;
  79
  80        if (for_push)
  81                return NULL;
  82
  83        if (data->fd > 0)
  84                close(data->fd);
  85        data->fd = read_bundle_header(transport->url, &data->header);
  86        if (data->fd < 0)
  87                die ("Could not read bundle '%s'.", transport->url);
  88        for (i = 0; i < data->header.references.nr; i++) {
  89                struct ref_list_entry *e = data->header.references.list + i;
  90                struct ref *ref = alloc_ref(e->name);
  91                oidcpy(&ref->old_oid, &e->oid);
  92                ref->next = result;
  93                result = ref;
  94        }
  95        return result;
  96}
  97
  98static int fetch_refs_from_bundle(struct transport *transport,
  99                               int nr_heads, struct ref **to_fetch)
 100{
 101        struct bundle_transport_data *data = transport->data;
 102        return unbundle(&data->header, data->fd,
 103                        transport->progress ? BUNDLE_VERBOSE : 0);
 104}
 105
 106static int close_bundle(struct transport *transport)
 107{
 108        struct bundle_transport_data *data = transport->data;
 109        if (data->fd > 0)
 110                close(data->fd);
 111        free(data);
 112        return 0;
 113}
 114
 115struct git_transport_data {
 116        struct git_transport_options options;
 117        struct child_process *conn;
 118        int fd[2];
 119        unsigned got_remote_heads : 1;
 120        struct oid_array extra_have;
 121        struct oid_array shallow;
 122};
 123
 124static int set_git_option(struct git_transport_options *opts,
 125                          const char *name, const char *value)
 126{
 127        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 128                opts->uploadpack = value;
 129                return 0;
 130        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 131                opts->receivepack = value;
 132                return 0;
 133        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 134                opts->thin = !!value;
 135                return 0;
 136        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 137                opts->followtags = !!value;
 138                return 0;
 139        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 140                opts->keep = !!value;
 141                return 0;
 142        } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 143                opts->update_shallow = !!value;
 144                return 0;
 145        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 146                if (!value)
 147                        opts->depth = 0;
 148                else {
 149                        char *end;
 150                        opts->depth = strtol(value, &end, 0);
 151                        if (*end)
 152                                die(_("transport: invalid depth option '%s'"), value);
 153                }
 154                return 0;
 155        } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 156                opts->deepen_since = value;
 157                return 0;
 158        } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 159                opts->deepen_not = (const struct string_list *)value;
 160                return 0;
 161        } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 162                opts->deepen_relative = !!value;
 163                return 0;
 164        }
 165        return 1;
 166}
 167
 168static int connect_setup(struct transport *transport, int for_push)
 169{
 170        struct git_transport_data *data = transport->data;
 171        int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 172
 173        if (data->conn)
 174                return 0;
 175
 176        switch (transport->family) {
 177        case TRANSPORT_FAMILY_ALL: break;
 178        case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 179        case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 180        }
 181
 182        data->conn = git_connect(data->fd, transport->url,
 183                                 for_push ? data->options.receivepack :
 184                                 data->options.uploadpack,
 185                                 flags);
 186
 187        return 0;
 188}
 189
 190static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 191{
 192        struct git_transport_data *data = transport->data;
 193        struct ref *refs;
 194
 195        connect_setup(transport, for_push);
 196        get_remote_heads(data->fd[0], NULL, 0, &refs,
 197                         for_push ? REF_NORMAL : 0,
 198                         &data->extra_have,
 199                         &data->shallow);
 200        data->got_remote_heads = 1;
 201
 202        return refs;
 203}
 204
 205static int fetch_refs_via_pack(struct transport *transport,
 206                               int nr_heads, struct ref **to_fetch)
 207{
 208        int ret = 0;
 209        struct git_transport_data *data = transport->data;
 210        struct ref *refs;
 211        char *dest = xstrdup(transport->url);
 212        struct fetch_pack_args args;
 213        struct ref *refs_tmp = NULL;
 214
 215        memset(&args, 0, sizeof(args));
 216        args.uploadpack = data->options.uploadpack;
 217        args.keep_pack = data->options.keep;
 218        args.lock_pack = 1;
 219        args.use_thin_pack = data->options.thin;
 220        args.include_tag = data->options.followtags;
 221        args.verbose = (transport->verbose > 1);
 222        args.quiet = (transport->verbose < 0);
 223        args.no_progress = !transport->progress;
 224        args.depth = data->options.depth;
 225        args.deepen_since = data->options.deepen_since;
 226        args.deepen_not = data->options.deepen_not;
 227        args.deepen_relative = data->options.deepen_relative;
 228        args.check_self_contained_and_connected =
 229                data->options.check_self_contained_and_connected;
 230        args.cloning = transport->cloning;
 231        args.update_shallow = data->options.update_shallow;
 232
 233        if (!data->got_remote_heads) {
 234                connect_setup(transport, 0);
 235                get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 236                                 NULL, &data->shallow);
 237                data->got_remote_heads = 1;
 238        }
 239
 240        refs = fetch_pack(&args, data->fd, data->conn,
 241                          refs_tmp ? refs_tmp : transport->remote_refs,
 242                          dest, to_fetch, nr_heads, &data->shallow,
 243                          &transport->pack_lockfile);
 244        close(data->fd[0]);
 245        close(data->fd[1]);
 246        if (finish_connect(data->conn))
 247                ret = -1;
 248        data->conn = NULL;
 249        data->got_remote_heads = 0;
 250        data->options.self_contained_and_connected =
 251                args.self_contained_and_connected;
 252
 253        if (refs == NULL)
 254                ret = -1;
 255        if (report_unmatched_refs(to_fetch, nr_heads))
 256                ret = -1;
 257
 258        free_refs(refs_tmp);
 259        free_refs(refs);
 260        free(dest);
 261        return ret;
 262}
 263
 264static int push_had_errors(struct ref *ref)
 265{
 266        for (; ref; ref = ref->next) {
 267                switch (ref->status) {
 268                case REF_STATUS_NONE:
 269                case REF_STATUS_UPTODATE:
 270                case REF_STATUS_OK:
 271                        break;
 272                default:
 273                        return 1;
 274                }
 275        }
 276        return 0;
 277}
 278
 279int transport_refs_pushed(struct ref *ref)
 280{
 281        for (; ref; ref = ref->next) {
 282                switch(ref->status) {
 283                case REF_STATUS_NONE:
 284                case REF_STATUS_UPTODATE:
 285                        break;
 286                default:
 287                        return 1;
 288                }
 289        }
 290        return 0;
 291}
 292
 293void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 294{
 295        struct refspec rs;
 296
 297        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 298                return;
 299
 300        rs.src = ref->name;
 301        rs.dst = NULL;
 302
 303        if (!remote_find_tracking(remote, &rs)) {
 304                if (verbose)
 305                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 306                if (ref->deletion) {
 307                        delete_ref(NULL, rs.dst, NULL, 0);
 308                } else
 309                        update_ref("update by push", rs.dst, &ref->new_oid,
 310                                   NULL, 0, 0);
 311                free(rs.dst);
 312        }
 313}
 314
 315static void print_ref_status(char flag, const char *summary,
 316                             struct ref *to, struct ref *from, const char *msg,
 317                             int porcelain, int summary_width)
 318{
 319        if (porcelain) {
 320                if (from)
 321                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 322                else
 323                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 324                if (msg)
 325                        fprintf(stdout, "%s (%s)\n", summary, msg);
 326                else
 327                        fprintf(stdout, "%s\n", summary);
 328        } else {
 329                fprintf(stderr, " %c %-*s ", flag, summary_width, summary);
 330                if (from)
 331                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 332                else
 333                        fputs(prettify_refname(to->name), stderr);
 334                if (msg) {
 335                        fputs(" (", stderr);
 336                        fputs(msg, stderr);
 337                        fputc(')', stderr);
 338                }
 339                fputc('\n', stderr);
 340        }
 341}
 342
 343static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
 344{
 345        if (ref->deletion)
 346                print_ref_status('-', "[deleted]", ref, NULL, NULL,
 347                                 porcelain, summary_width);
 348        else if (is_null_oid(&ref->old_oid))
 349                print_ref_status('*',
 350                        (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 351                        "[new branch]"),
 352                        ref, ref->peer_ref, NULL, porcelain, summary_width);
 353        else {
 354                struct strbuf quickref = STRBUF_INIT;
 355                char type;
 356                const char *msg;
 357
 358                strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
 359                                         DEFAULT_ABBREV);
 360                if (ref->forced_update) {
 361                        strbuf_addstr(&quickref, "...");
 362                        type = '+';
 363                        msg = "forced update";
 364                } else {
 365                        strbuf_addstr(&quickref, "..");
 366                        type = ' ';
 367                        msg = NULL;
 368                }
 369                strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
 370                                         DEFAULT_ABBREV);
 371
 372                print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 373                                 porcelain, summary_width);
 374                strbuf_release(&quickref);
 375        }
 376}
 377
 378static int print_one_push_status(struct ref *ref, const char *dest, int count,
 379                                 int porcelain, int summary_width)
 380{
 381        if (!count) {
 382                char *url = transport_anonymize_url(dest);
 383                fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 384                free(url);
 385        }
 386
 387        switch(ref->status) {
 388        case REF_STATUS_NONE:
 389                print_ref_status('X', "[no match]", ref, NULL, NULL,
 390                                 porcelain, summary_width);
 391                break;
 392        case REF_STATUS_REJECT_NODELETE:
 393                print_ref_status('!', "[rejected]", ref, NULL,
 394                                 "remote does not support deleting refs",
 395                                 porcelain, summary_width);
 396                break;
 397        case REF_STATUS_UPTODATE:
 398                print_ref_status('=', "[up to date]", ref,
 399                                 ref->peer_ref, NULL, porcelain, summary_width);
 400                break;
 401        case REF_STATUS_REJECT_NONFASTFORWARD:
 402                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 403                                 "non-fast-forward", porcelain, summary_width);
 404                break;
 405        case REF_STATUS_REJECT_ALREADY_EXISTS:
 406                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 407                                 "already exists", porcelain, summary_width);
 408                break;
 409        case REF_STATUS_REJECT_FETCH_FIRST:
 410                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 411                                 "fetch first", porcelain, summary_width);
 412                break;
 413        case REF_STATUS_REJECT_NEEDS_FORCE:
 414                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 415                                 "needs force", porcelain, summary_width);
 416                break;
 417        case REF_STATUS_REJECT_STALE:
 418                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 419                                 "stale info", porcelain, summary_width);
 420                break;
 421        case REF_STATUS_REJECT_SHALLOW:
 422                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 423                                 "new shallow roots not allowed",
 424                                 porcelain, summary_width);
 425                break;
 426        case REF_STATUS_REMOTE_REJECT:
 427                print_ref_status('!', "[remote rejected]", ref,
 428                                 ref->deletion ? NULL : ref->peer_ref,
 429                                 ref->remote_status, porcelain, summary_width);
 430                break;
 431        case REF_STATUS_EXPECTING_REPORT:
 432                print_ref_status('!', "[remote failure]", ref,
 433                                 ref->deletion ? NULL : ref->peer_ref,
 434                                 "remote failed to report status",
 435                                 porcelain, summary_width);
 436                break;
 437        case REF_STATUS_ATOMIC_PUSH_FAILED:
 438                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 439                                 "atomic push failed", porcelain, summary_width);
 440                break;
 441        case REF_STATUS_OK:
 442                print_ok_ref_status(ref, porcelain, summary_width);
 443                break;
 444        }
 445
 446        return 1;
 447}
 448
 449static int measure_abbrev(const struct object_id *oid, int sofar)
 450{
 451        char hex[GIT_MAX_HEXSZ + 1];
 452        int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
 453
 454        return (w < sofar) ? sofar : w;
 455}
 456
 457int transport_summary_width(const struct ref *refs)
 458{
 459        int maxw = -1;
 460
 461        for (; refs; refs = refs->next) {
 462                maxw = measure_abbrev(&refs->old_oid, maxw);
 463                maxw = measure_abbrev(&refs->new_oid, maxw);
 464        }
 465        if (maxw < 0)
 466                maxw = FALLBACK_DEFAULT_ABBREV;
 467        return (2 * maxw + 3);
 468}
 469
 470void transport_print_push_status(const char *dest, struct ref *refs,
 471                                  int verbose, int porcelain, unsigned int *reject_reasons)
 472{
 473        struct ref *ref;
 474        int n = 0;
 475        char *head;
 476        int summary_width = transport_summary_width(refs);
 477
 478        head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 479
 480        if (verbose) {
 481                for (ref = refs; ref; ref = ref->next)
 482                        if (ref->status == REF_STATUS_UPTODATE)
 483                                n += print_one_push_status(ref, dest, n,
 484                                                           porcelain, summary_width);
 485        }
 486
 487        for (ref = refs; ref; ref = ref->next)
 488                if (ref->status == REF_STATUS_OK)
 489                        n += print_one_push_status(ref, dest, n,
 490                                                   porcelain, summary_width);
 491
 492        *reject_reasons = 0;
 493        for (ref = refs; ref; ref = ref->next) {
 494                if (ref->status != REF_STATUS_NONE &&
 495                    ref->status != REF_STATUS_UPTODATE &&
 496                    ref->status != REF_STATUS_OK)
 497                        n += print_one_push_status(ref, dest, n,
 498                                                   porcelain, summary_width);
 499                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 500                        if (head != NULL && !strcmp(head, ref->name))
 501                                *reject_reasons |= REJECT_NON_FF_HEAD;
 502                        else
 503                                *reject_reasons |= REJECT_NON_FF_OTHER;
 504                } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 505                        *reject_reasons |= REJECT_ALREADY_EXISTS;
 506                } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 507                        *reject_reasons |= REJECT_FETCH_FIRST;
 508                } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 509                        *reject_reasons |= REJECT_NEEDS_FORCE;
 510                }
 511        }
 512        free(head);
 513}
 514
 515void transport_verify_remote_names(int nr_heads, const char **heads)
 516{
 517        int i;
 518
 519        for (i = 0; i < nr_heads; i++) {
 520                const char *local = heads[i];
 521                const char *remote = strrchr(heads[i], ':');
 522
 523                if (*local == '+')
 524                        local++;
 525
 526                /* A matching refspec is okay.  */
 527                if (remote == local && remote[1] == '\0')
 528                        continue;
 529
 530                remote = remote ? (remote + 1) : local;
 531                if (check_refname_format(remote,
 532                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 533                        die("remote part of refspec is not a valid name in %s",
 534                                heads[i]);
 535        }
 536}
 537
 538static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 539{
 540        struct git_transport_data *data = transport->data;
 541        struct send_pack_args args;
 542        int ret;
 543
 544        if (!data->got_remote_heads) {
 545                struct ref *tmp_refs;
 546                connect_setup(transport, 1);
 547
 548                get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 549                                 NULL, &data->shallow);
 550                data->got_remote_heads = 1;
 551        }
 552
 553        memset(&args, 0, sizeof(args));
 554        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 555        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 556        args.use_thin_pack = data->options.thin;
 557        args.verbose = (transport->verbose > 0);
 558        args.quiet = (transport->verbose < 0);
 559        args.progress = transport->progress;
 560        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 561        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 562        args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 563        args.push_options = transport->push_options;
 564        args.url = transport->url;
 565
 566        if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 567                args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 568        else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 569                args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 570        else
 571                args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 572
 573        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 574                        &data->extra_have);
 575
 576        close(data->fd[1]);
 577        close(data->fd[0]);
 578        ret |= finish_connect(data->conn);
 579        data->conn = NULL;
 580        data->got_remote_heads = 0;
 581
 582        return ret;
 583}
 584
 585static int connect_git(struct transport *transport, const char *name,
 586                       const char *executable, int fd[2])
 587{
 588        struct git_transport_data *data = transport->data;
 589        data->conn = git_connect(data->fd, transport->url,
 590                                 executable, 0);
 591        fd[0] = data->fd[0];
 592        fd[1] = data->fd[1];
 593        return 0;
 594}
 595
 596static int disconnect_git(struct transport *transport)
 597{
 598        struct git_transport_data *data = transport->data;
 599        if (data->conn) {
 600                if (data->got_remote_heads)
 601                        packet_flush(data->fd[1]);
 602                close(data->fd[0]);
 603                close(data->fd[1]);
 604                finish_connect(data->conn);
 605        }
 606
 607        free(data);
 608        return 0;
 609}
 610
 611static struct transport_vtable taken_over_vtable = {
 612        NULL,
 613        get_refs_via_connect,
 614        fetch_refs_via_pack,
 615        git_transport_push,
 616        NULL,
 617        disconnect_git
 618};
 619
 620void transport_take_over(struct transport *transport,
 621                         struct child_process *child)
 622{
 623        struct git_transport_data *data;
 624
 625        if (!transport->smart_options)
 626                die("BUG: taking over transport requires non-NULL "
 627                    "smart_options field.");
 628
 629        data = xcalloc(1, sizeof(*data));
 630        data->options = *transport->smart_options;
 631        data->conn = child;
 632        data->fd[0] = data->conn->out;
 633        data->fd[1] = data->conn->in;
 634        data->got_remote_heads = 0;
 635        transport->data = data;
 636
 637        transport->vtable = &taken_over_vtable;
 638        transport->smart_options = &(data->options);
 639
 640        transport->cannot_reuse = 1;
 641}
 642
 643static int is_file(const char *url)
 644{
 645        struct stat buf;
 646        if (stat(url, &buf))
 647                return 0;
 648        return S_ISREG(buf.st_mode);
 649}
 650
 651static int external_specification_len(const char *url)
 652{
 653        return strchr(url, ':') - url;
 654}
 655
 656static const struct string_list *protocol_whitelist(void)
 657{
 658        static int enabled = -1;
 659        static struct string_list allowed = STRING_LIST_INIT_DUP;
 660
 661        if (enabled < 0) {
 662                const char *v = getenv("GIT_ALLOW_PROTOCOL");
 663                if (v) {
 664                        string_list_split(&allowed, v, ':', -1);
 665                        string_list_sort(&allowed);
 666                        enabled = 1;
 667                } else {
 668                        enabled = 0;
 669                }
 670        }
 671
 672        return enabled ? &allowed : NULL;
 673}
 674
 675enum protocol_allow_config {
 676        PROTOCOL_ALLOW_NEVER = 0,
 677        PROTOCOL_ALLOW_USER_ONLY,
 678        PROTOCOL_ALLOW_ALWAYS
 679};
 680
 681static enum protocol_allow_config parse_protocol_config(const char *key,
 682                                                        const char *value)
 683{
 684        if (!strcasecmp(value, "always"))
 685                return PROTOCOL_ALLOW_ALWAYS;
 686        else if (!strcasecmp(value, "never"))
 687                return PROTOCOL_ALLOW_NEVER;
 688        else if (!strcasecmp(value, "user"))
 689                return PROTOCOL_ALLOW_USER_ONLY;
 690
 691        die("unknown value for config '%s': %s", key, value);
 692}
 693
 694static enum protocol_allow_config get_protocol_config(const char *type)
 695{
 696        char *key = xstrfmt("protocol.%s.allow", type);
 697        char *value;
 698
 699        /* first check the per-protocol config */
 700        if (!git_config_get_string(key, &value)) {
 701                enum protocol_allow_config ret =
 702                        parse_protocol_config(key, value);
 703                free(key);
 704                free(value);
 705                return ret;
 706        }
 707        free(key);
 708
 709        /* if defined, fallback to user-defined default for unknown protocols */
 710        if (!git_config_get_string("protocol.allow", &value)) {
 711                enum protocol_allow_config ret =
 712                        parse_protocol_config("protocol.allow", value);
 713                free(value);
 714                return ret;
 715        }
 716
 717        /* fallback to built-in defaults */
 718        /* known safe */
 719        if (!strcmp(type, "http") ||
 720            !strcmp(type, "https") ||
 721            !strcmp(type, "git") ||
 722            !strcmp(type, "ssh") ||
 723            !strcmp(type, "file"))
 724                return PROTOCOL_ALLOW_ALWAYS;
 725
 726        /* known scary; err on the side of caution */
 727        if (!strcmp(type, "ext"))
 728                return PROTOCOL_ALLOW_NEVER;
 729
 730        /* unknown; by default let them be used only directly by the user */
 731        return PROTOCOL_ALLOW_USER_ONLY;
 732}
 733
 734int is_transport_allowed(const char *type, int from_user)
 735{
 736        const struct string_list *whitelist = protocol_whitelist();
 737        if (whitelist)
 738                return string_list_has_string(whitelist, type);
 739
 740        switch (get_protocol_config(type)) {
 741        case PROTOCOL_ALLOW_ALWAYS:
 742                return 1;
 743        case PROTOCOL_ALLOW_NEVER:
 744                return 0;
 745        case PROTOCOL_ALLOW_USER_ONLY:
 746                if (from_user < 0)
 747                        from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 748                return from_user;
 749        }
 750
 751        die("BUG: invalid protocol_allow_config type");
 752}
 753
 754void transport_check_allowed(const char *type)
 755{
 756        if (!is_transport_allowed(type, -1))
 757                die("transport '%s' not allowed", type);
 758}
 759
 760static struct transport_vtable bundle_vtable = {
 761        NULL,
 762        get_refs_from_bundle,
 763        fetch_refs_from_bundle,
 764        NULL,
 765        NULL,
 766        close_bundle
 767};
 768
 769static struct transport_vtable builtin_smart_vtable = {
 770        NULL,
 771        get_refs_via_connect,
 772        fetch_refs_via_pack,
 773        git_transport_push,
 774        connect_git,
 775        disconnect_git
 776};
 777
 778struct transport *transport_get(struct remote *remote, const char *url)
 779{
 780        const char *helper;
 781        struct transport *ret = xcalloc(1, sizeof(*ret));
 782
 783        ret->progress = isatty(2);
 784
 785        if (!remote)
 786                die("No remote provided to transport_get()");
 787
 788        ret->got_remote_refs = 0;
 789        ret->remote = remote;
 790        helper = remote->foreign_vcs;
 791
 792        if (!url && remote->url)
 793                url = remote->url[0];
 794        ret->url = url;
 795
 796        /* maybe it is a foreign URL? */
 797        if (url) {
 798                const char *p = url;
 799
 800                while (is_urlschemechar(p == url, *p))
 801                        p++;
 802                if (starts_with(p, "::"))
 803                        helper = xstrndup(url, p - url);
 804        }
 805
 806        if (helper) {
 807                transport_helper_init(ret, helper);
 808        } else if (starts_with(url, "rsync:")) {
 809                die("git-over-rsync is no longer supported");
 810        } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 811                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 812                transport_check_allowed("file");
 813                ret->data = data;
 814                ret->vtable = &bundle_vtable;
 815                ret->smart_options = NULL;
 816        } else if (!is_url(url)
 817                || starts_with(url, "file://")
 818                || starts_with(url, "git://")
 819                || starts_with(url, "ssh://")
 820                || starts_with(url, "git+ssh://") /* deprecated - do not use */
 821                || starts_with(url, "ssh+git://") /* deprecated - do not use */
 822                ) {
 823                /*
 824                 * These are builtin smart transports; "allowed" transports
 825                 * will be checked individually in git_connect.
 826                 */
 827                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 828                ret->data = data;
 829                ret->vtable = &builtin_smart_vtable;
 830                ret->smart_options = &(data->options);
 831
 832                data->conn = NULL;
 833                data->got_remote_heads = 0;
 834        } else {
 835                /* Unknown protocol in URL. Pass to external handler. */
 836                int len = external_specification_len(url);
 837                char *handler = xmemdupz(url, len);
 838                transport_helper_init(ret, handler);
 839        }
 840
 841        if (ret->smart_options) {
 842                ret->smart_options->thin = 1;
 843                ret->smart_options->uploadpack = "git-upload-pack";
 844                if (remote->uploadpack)
 845                        ret->smart_options->uploadpack = remote->uploadpack;
 846                ret->smart_options->receivepack = "git-receive-pack";
 847                if (remote->receivepack)
 848                        ret->smart_options->receivepack = remote->receivepack;
 849        }
 850
 851        return ret;
 852}
 853
 854int transport_set_option(struct transport *transport,
 855                         const char *name, const char *value)
 856{
 857        int git_reports = 1, protocol_reports = 1;
 858
 859        if (transport->smart_options)
 860                git_reports = set_git_option(transport->smart_options,
 861                                             name, value);
 862
 863        if (transport->vtable->set_option)
 864                protocol_reports = transport->vtable->set_option(transport,
 865                                                                 name, value);
 866
 867        /* If either report is 0, report 0 (success). */
 868        if (!git_reports || !protocol_reports)
 869                return 0;
 870        /* If either reports -1 (invalid value), report -1. */
 871        if ((git_reports == -1) || (protocol_reports == -1))
 872                return -1;
 873        /* Otherwise if both report unknown, report unknown. */
 874        return 1;
 875}
 876
 877void transport_set_verbosity(struct transport *transport, int verbosity,
 878        int force_progress)
 879{
 880        if (verbosity >= 1)
 881                transport->verbose = verbosity <= 3 ? verbosity : 3;
 882        if (verbosity < 0)
 883                transport->verbose = -1;
 884
 885        /**
 886         * Rules used to determine whether to report progress (processing aborts
 887         * when a rule is satisfied):
 888         *
 889         *   . Report progress, if force_progress is 1 (ie. --progress).
 890         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 891         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 892         *   . Report progress if isatty(2) is 1.
 893         **/
 894        if (force_progress >= 0)
 895                transport->progress = !!force_progress;
 896        else
 897                transport->progress = verbosity >= 0 && isatty(2);
 898}
 899
 900static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 901{
 902        int i;
 903
 904        fprintf(stderr, _("The following submodule paths contain changes that can\n"
 905                        "not be found on any remote:\n"));
 906        for (i = 0; i < needs_pushing->nr; i++)
 907                fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
 908        fprintf(stderr, _("\nPlease try\n\n"
 909                          "     git push --recurse-submodules=on-demand\n\n"
 910                          "or cd to the path and use\n\n"
 911                          "     git push\n\n"
 912                          "to push them to a remote.\n\n"));
 913
 914        string_list_clear(needs_pushing, 0);
 915
 916        die(_("Aborting."));
 917}
 918
 919static int run_pre_push_hook(struct transport *transport,
 920                             struct ref *remote_refs)
 921{
 922        int ret = 0, x;
 923        struct ref *r;
 924        struct child_process proc = CHILD_PROCESS_INIT;
 925        struct strbuf buf;
 926        const char *argv[4];
 927
 928        if (!(argv[0] = find_hook("pre-push")))
 929                return 0;
 930
 931        argv[1] = transport->remote->name;
 932        argv[2] = transport->url;
 933        argv[3] = NULL;
 934
 935        proc.argv = argv;
 936        proc.in = -1;
 937
 938        if (start_command(&proc)) {
 939                finish_command(&proc);
 940                return -1;
 941        }
 942
 943        sigchain_push(SIGPIPE, SIG_IGN);
 944
 945        strbuf_init(&buf, 256);
 946
 947        for (r = remote_refs; r; r = r->next) {
 948                if (!r->peer_ref) continue;
 949                if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 950                if (r->status == REF_STATUS_REJECT_STALE) continue;
 951                if (r->status == REF_STATUS_UPTODATE) continue;
 952
 953                strbuf_reset(&buf);
 954                strbuf_addf( &buf, "%s %s %s %s\n",
 955                         r->peer_ref->name, oid_to_hex(&r->new_oid),
 956                         r->name, oid_to_hex(&r->old_oid));
 957
 958                if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 959                        /* We do not mind if a hook does not read all refs. */
 960                        if (errno != EPIPE)
 961                                ret = -1;
 962                        break;
 963                }
 964        }
 965
 966        strbuf_release(&buf);
 967
 968        x = close(proc.in);
 969        if (!ret)
 970                ret = x;
 971
 972        sigchain_pop(SIGPIPE);
 973
 974        x = finish_command(&proc);
 975        if (!ret)
 976                ret = x;
 977
 978        return ret;
 979}
 980
 981int transport_push(struct transport *transport,
 982                   int refspec_nr, const char **refspec, int flags,
 983                   unsigned int *reject_reasons)
 984{
 985        *reject_reasons = 0;
 986        transport_verify_remote_names(refspec_nr, refspec);
 987
 988        if (transport->vtable->push_refs) {
 989                struct ref *remote_refs;
 990                struct ref *local_refs = get_local_heads();
 991                int match_flags = MATCH_REFS_NONE;
 992                int verbose = (transport->verbose > 0);
 993                int quiet = (transport->verbose < 0);
 994                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 995                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 996                int push_ret, ret, err;
 997
 998                if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 999                        return -1;
1000
1001                remote_refs = transport->vtable->get_refs_list(transport, 1);
1002
1003                if (flags & TRANSPORT_PUSH_ALL)
1004                        match_flags |= MATCH_REFS_ALL;
1005                if (flags & TRANSPORT_PUSH_MIRROR)
1006                        match_flags |= MATCH_REFS_MIRROR;
1007                if (flags & TRANSPORT_PUSH_PRUNE)
1008                        match_flags |= MATCH_REFS_PRUNE;
1009                if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1010                        match_flags |= MATCH_REFS_FOLLOW_TAGS;
1011
1012                if (match_push_refs(local_refs, &remote_refs,
1013                                    refspec_nr, refspec, match_flags)) {
1014                        return -1;
1015                }
1016
1017                if (transport->smart_options &&
1018                    transport->smart_options->cas &&
1019                    !is_empty_cas(transport->smart_options->cas))
1020                        apply_push_cas(transport->smart_options->cas,
1021                                       transport->remote, remote_refs);
1022
1023                set_ref_status_for_push(remote_refs,
1024                        flags & TRANSPORT_PUSH_MIRROR,
1025                        flags & TRANSPORT_PUSH_FORCE);
1026
1027                if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1028                        if (run_pre_push_hook(transport, remote_refs))
1029                                return -1;
1030
1031                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1032                              TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1033                    !is_bare_repository()) {
1034                        struct ref *ref = remote_refs;
1035                        struct oid_array commits = OID_ARRAY_INIT;
1036
1037                        for (; ref; ref = ref->next)
1038                                if (!is_null_oid(&ref->new_oid))
1039                                        oid_array_append(&commits,
1040                                                          &ref->new_oid);
1041
1042                        if (!push_unpushed_submodules(&commits,
1043                                                      transport->remote,
1044                                                      refspec, refspec_nr,
1045                                                      transport->push_options,
1046                                                      pretend)) {
1047                                oid_array_clear(&commits);
1048                                die("Failed to push all needed submodules!");
1049                        }
1050                        oid_array_clear(&commits);
1051                }
1052
1053                if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1054                     ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1055                                TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1056                      !pretend)) && !is_bare_repository()) {
1057                        struct ref *ref = remote_refs;
1058                        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1059                        struct oid_array commits = OID_ARRAY_INIT;
1060
1061                        for (; ref; ref = ref->next)
1062                                if (!is_null_oid(&ref->new_oid))
1063                                        oid_array_append(&commits,
1064                                                          &ref->new_oid);
1065
1066                        if (find_unpushed_submodules(&commits, transport->remote->name,
1067                                                &needs_pushing)) {
1068                                oid_array_clear(&commits);
1069                                die_with_unpushed_submodules(&needs_pushing);
1070                        }
1071                        string_list_clear(&needs_pushing, 0);
1072                        oid_array_clear(&commits);
1073                }
1074
1075                if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
1076                        push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1077                else
1078                        push_ret = 0;
1079                err = push_had_errors(remote_refs);
1080                ret = push_ret | err;
1081
1082                if (!quiet || err)
1083                        transport_print_push_status(transport->url, remote_refs,
1084                                        verbose | porcelain, porcelain,
1085                                        reject_reasons);
1086
1087                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1088                        set_upstreams(transport, remote_refs, pretend);
1089
1090                if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1091                               TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1092                        struct ref *ref;
1093                        for (ref = remote_refs; ref; ref = ref->next)
1094                                transport_update_tracking_ref(transport->remote, ref, verbose);
1095                }
1096
1097                if (porcelain && !push_ret)
1098                        puts("Done");
1099                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1100                        fprintf(stderr, "Everything up-to-date\n");
1101
1102                return ret;
1103        }
1104        return 1;
1105}
1106
1107const struct ref *transport_get_remote_refs(struct transport *transport)
1108{
1109        if (!transport->got_remote_refs) {
1110                transport->remote_refs = transport->vtable->get_refs_list(transport, 0);
1111                transport->got_remote_refs = 1;
1112        }
1113
1114        return transport->remote_refs;
1115}
1116
1117int transport_fetch_refs(struct transport *transport, struct ref *refs)
1118{
1119        int rc;
1120        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1121        struct ref **heads = NULL;
1122        struct ref *rm;
1123
1124        for (rm = refs; rm; rm = rm->next) {
1125                nr_refs++;
1126                if (rm->peer_ref &&
1127                    !is_null_oid(&rm->old_oid) &&
1128                    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1129                        continue;
1130                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1131                heads[nr_heads++] = rm;
1132        }
1133
1134        if (!nr_heads) {
1135                /*
1136                 * When deepening of a shallow repository is requested,
1137                 * then local and remote refs are likely to still be equal.
1138                 * Just feed them all to the fetch method in that case.
1139                 * This condition shouldn't be met in a non-deepening fetch
1140                 * (see builtin/fetch.c:quickfetch()).
1141                 */
1142                ALLOC_ARRAY(heads, nr_refs);
1143                for (rm = refs; rm; rm = rm->next)
1144                        heads[nr_heads++] = rm;
1145        }
1146
1147        rc = transport->vtable->fetch(transport, nr_heads, heads);
1148
1149        free(heads);
1150        return rc;
1151}
1152
1153void transport_unlock_pack(struct transport *transport)
1154{
1155        if (transport->pack_lockfile) {
1156                unlink_or_warn(transport->pack_lockfile);
1157                FREE_AND_NULL(transport->pack_lockfile);
1158        }
1159}
1160
1161int transport_connect(struct transport *transport, const char *name,
1162                      const char *exec, int fd[2])
1163{
1164        if (transport->vtable->connect)
1165                return transport->vtable->connect(transport, name, exec, fd);
1166        else
1167                die("Operation not supported by protocol");
1168}
1169
1170int transport_disconnect(struct transport *transport)
1171{
1172        int ret = 0;
1173        if (transport->vtable->disconnect)
1174                ret = transport->vtable->disconnect(transport);
1175        free(transport);
1176        return ret;
1177}
1178
1179/*
1180 * Strip username (and password) from a URL and return
1181 * it in a newly allocated string.
1182 */
1183char *transport_anonymize_url(const char *url)
1184{
1185        char *scheme_prefix, *anon_part;
1186        size_t anon_len, prefix_len = 0;
1187
1188        anon_part = strchr(url, '@');
1189        if (url_is_local_not_ssh(url) || !anon_part)
1190                goto literal_copy;
1191
1192        anon_len = strlen(++anon_part);
1193        scheme_prefix = strstr(url, "://");
1194        if (!scheme_prefix) {
1195                if (!strchr(anon_part, ':'))
1196                        /* cannot be "me@there:/path/name" */
1197                        goto literal_copy;
1198        } else {
1199                const char *cp;
1200                /* make sure scheme is reasonable */
1201                for (cp = url; cp < scheme_prefix; cp++) {
1202                        switch (*cp) {
1203                                /* RFC 1738 2.1 */
1204                        case '+': case '.': case '-':
1205                                break; /* ok */
1206                        default:
1207                                if (isalnum(*cp))
1208                                        break;
1209                                /* it isn't */
1210                                goto literal_copy;
1211                        }
1212                }
1213                /* @ past the first slash does not count */
1214                cp = strchr(scheme_prefix + 3, '/');
1215                if (cp && cp < anon_part)
1216                        goto literal_copy;
1217                prefix_len = scheme_prefix - url + 3;
1218        }
1219        return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1220                       (int)anon_len, anon_part);
1221literal_copy:
1222        return xstrdup(url);
1223}
1224
1225static void read_alternate_refs(const char *path,
1226                                alternate_ref_fn *cb,
1227                                void *data)
1228{
1229        struct child_process cmd = CHILD_PROCESS_INIT;
1230        struct strbuf line = STRBUF_INIT;
1231        FILE *fh;
1232
1233        cmd.git_cmd = 1;
1234        argv_array_pushf(&cmd.args, "--git-dir=%s", path);
1235        argv_array_push(&cmd.args, "for-each-ref");
1236        argv_array_push(&cmd.args, "--format=%(objectname) %(refname)");
1237        cmd.env = local_repo_env;
1238        cmd.out = -1;
1239
1240        if (start_command(&cmd))
1241                return;
1242
1243        fh = xfdopen(cmd.out, "r");
1244        while (strbuf_getline_lf(&line, fh) != EOF) {
1245                struct object_id oid;
1246
1247                if (get_oid_hex(line.buf, &oid) ||
1248                    line.buf[GIT_SHA1_HEXSZ] != ' ') {
1249                        warning("invalid line while parsing alternate refs: %s",
1250                                line.buf);
1251                        break;
1252                }
1253
1254                cb(line.buf + GIT_SHA1_HEXSZ + 1, &oid, data);
1255        }
1256
1257        fclose(fh);
1258        finish_command(&cmd);
1259}
1260
1261struct alternate_refs_data {
1262        alternate_ref_fn *fn;
1263        void *data;
1264};
1265
1266static int refs_from_alternate_cb(struct alternate_object_database *e,
1267                                  void *data)
1268{
1269        struct strbuf path = STRBUF_INIT;
1270        size_t base_len;
1271        struct alternate_refs_data *cb = data;
1272
1273        if (!strbuf_realpath(&path, e->path, 0))
1274                goto out;
1275        if (!strbuf_strip_suffix(&path, "/objects"))
1276                goto out;
1277        base_len = path.len;
1278
1279        /* Is this a git repository with refs? */
1280        strbuf_addstr(&path, "/refs");
1281        if (!is_directory(path.buf))
1282                goto out;
1283        strbuf_setlen(&path, base_len);
1284
1285        read_alternate_refs(path.buf, cb->fn, cb->data);
1286
1287out:
1288        strbuf_release(&path);
1289        return 0;
1290}
1291
1292void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1293{
1294        struct alternate_refs_data cb;
1295        cb.fn = fn;
1296        cb.data = data;
1297        foreach_alt_odb(refs_from_alternate_cb, &cb);
1298}