git.oblomov.eu Git - git/blob - transport.c

   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 "refspec.h"
  15 #include "branch.h"
  16 #include "url.h"
  17 #include "submodule.h"
  18 #include "string-list.h"
  19 #include "oid-array.h"
  20 #include "sigchain.h"
  21 #include "transport-internal.h"
  22 #include "protocol.h"
  23 #include "object-store.h"
  24 #include "color.h"
  25
  26 static int transport_use_color = -1;
  27 static char transport_colors[][COLOR_MAXLEN] = {
  28         GIT_COLOR_RESET,
  29         GIT_COLOR_RED           /* REJECTED */
  30 };
  31
  32 enum color_transport {
  33         TRANSPORT_COLOR_RESET = 0,
  34         TRANSPORT_COLOR_REJECTED = 1
  35 };
  36
  37 static int transport_color_config(void)
  38 {
  39         const char *keys[] = {
  40                 "color.transport.reset",
  41                 "color.transport.rejected"
  42         }, *key = "color.transport";
  43         char *value;
  44         int i;
  45         static int initialized;
  46
  47         if (initialized)
  48                 return 0;
  49         initialized = 1;
  50
  51         if (!git_config_get_string(key, &value))
  52                 transport_use_color = git_config_colorbool(key, value);
  53
  54         if (!want_color_stderr(transport_use_color))
  55                 return 0;
  56
  57         for (i = 0; i < ARRAY_SIZE(keys); i++)
  58                 if (!git_config_get_string(keys[i], &value)) {
  59                         if (!value)
  60                                 return config_error_nonbool(keys[i]);
  61                         if (color_parse(value, transport_colors[i]) < 0)
  62                                 return -1;
  63                 }
  64
  65         return 0;
  66 }
  67
  68 static const char *transport_get_color(enum color_transport ix)
  69 {
  70         if (want_color_stderr(transport_use_color))
  71                 return transport_colors[ix];
  72         return "";
  73 }
  74
  75 static void set_upstreams(struct transport *transport, struct ref *refs,
  76         int pretend)
  77 {
  78         struct ref *ref;
  79         for (ref = refs; ref; ref = ref->next) {
  80                 const char *localname;
  81                 const char *tmp;
  82                 const char *remotename;
  83                 int flag = 0;
  84                 /*
  85                  * Check suitability for tracking. Must be successful /
  86                  * already up-to-date ref create/modify (not delete).
  87                  */
  88                 if (ref->status != REF_STATUS_OK &&
  89                         ref->status != REF_STATUS_UPTODATE)
  90                         continue;
  91                 if (!ref->peer_ref)
  92                         continue;
  93                 if (is_null_oid(&ref->new_oid))
  94                         continue;
  95
  96                 /* Follow symbolic refs (mainly for HEAD). */
  97                 localname = ref->peer_ref->name;
  98                 remotename = ref->name;
  99                 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
 100                                          NULL, &flag);
 101                 if (tmp && flag & REF_ISSYMREF &&
 102                         starts_with(tmp, "refs/heads/"))
 103                         localname = tmp;
 104
 105                 /* Both source and destination must be local branches. */
 106                 if (!localname || !starts_with(localname, "refs/heads/"))
 107                         continue;
 108                 if (!remotename || !starts_with(remotename, "refs/heads/"))
 109                         continue;
 110
 111                 if (!pretend)
 112                         install_branch_config(BRANCH_CONFIG_VERBOSE,
 113                                 localname + 11, transport->remote->name,
 114                                 remotename);
 115                 else
 116                         printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
 117                                 localname + 11, remotename + 11,
 118                                 transport->remote->name);
 119         }
 120 }
 121
 122 struct bundle_transport_data {
 123         int fd;
 124         struct bundle_header header;
 125         unsigned get_refs_from_bundle_called : 1;
 126 };
 127
 128 static struct ref *get_refs_from_bundle(struct transport *transport,
 129                                         int for_push,
 130                                         const struct strvec *ref_prefixes)
 131 {
 132         struct bundle_transport_data *data = transport->data;
 133         struct ref *result = NULL;
 134         int i;
 135
 136         if (for_push)
 137                 return NULL;
 138
 139         data->get_refs_from_bundle_called = 1;
 140
 141         if (data->fd > 0)
 142                 close(data->fd);
 143         data->fd = read_bundle_header(transport->url, &data->header);
 144         if (data->fd < 0)
 145                 die(_("could not read bundle '%s'"), transport->url);
 146
 147         transport->hash_algo = data->header.hash_algo;
 148
 149         for (i = 0; i < data->header.references.nr; i++) {
 150                 struct ref_list_entry *e = data->header.references.list + i;
 151                 struct ref *ref = alloc_ref(e->name);
 152                 oidcpy(&ref->old_oid, &e->oid);
 153                 ref->next = result;
 154                 result = ref;
 155         }
 156         return result;
 157 }
 158
 159 static int fetch_refs_from_bundle(struct transport *transport,
 160                                int nr_heads, struct ref **to_fetch)
 161 {
 162         struct bundle_transport_data *data = transport->data;
 163         int ret;
 164
 165         if (!data->get_refs_from_bundle_called)
 166                 get_refs_from_bundle(transport, 0, NULL);
 167         ret = unbundle(the_repository, &data->header, data->fd,
 168                            transport->progress ? BUNDLE_VERBOSE : 0);
 169         transport->hash_algo = data->header.hash_algo;
 170         return ret;
 171 }
 172
 173 static int close_bundle(struct transport *transport)
 174 {
 175         struct bundle_transport_data *data = transport->data;
 176         if (data->fd > 0)
 177                 close(data->fd);
 178         free(data);
 179         return 0;
 180 }
 181
 182 struct git_transport_data {
 183         struct git_transport_options options;
 184         struct child_process *conn;
 185         int fd[2];
 186         unsigned got_remote_heads : 1;
 187         enum protocol_version version;
 188         struct oid_array extra_have;
 189         struct oid_array shallow;
 190 };
 191
 192 static int set_git_option(struct git_transport_options *opts,
 193                           const char *name, const char *value)
 194 {
 195         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 196                 opts->uploadpack = value;
 197                 return 0;
 198         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 199                 opts->receivepack = value;
 200                 return 0;
 201         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 202                 opts->thin = !!value;
 203                 return 0;
 204         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 205                 opts->followtags = !!value;
 206                 return 0;
 207         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 208                 opts->keep = !!value;
 209                 return 0;
 210         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 211                 opts->update_shallow = !!value;
 212                 return 0;
 213         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 214                 if (!value)
 215                         opts->depth = 0;
 216                 else {
 217                         char *end;
 218                         opts->depth = strtol(value, &end, 0);
 219                         if (*end)
 220                                 die(_("transport: invalid depth option '%s'"), value);
 221                 }
 222                 return 0;
 223         } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 224                 opts->deepen_since = value;
 225                 return 0;
 226         } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 227                 opts->deepen_not = (const struct string_list *)value;
 228                 return 0;
 229         } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 230                 opts->deepen_relative = !!value;
 231                 return 0;
 232         } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
 233                 opts->from_promisor = !!value;
 234                 return 0;
 235         } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
 236                 list_objects_filter_die_if_populated(&opts->filter_options);
 237                 parse_list_objects_filter(&opts->filter_options, value);
 238                 return 0;
 239         }
 240         return 1;
 241 }
 242
 243 static int connect_setup(struct transport *transport, int for_push)
 244 {
 245         struct git_transport_data *data = transport->data;
 246         int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 247
 248         if (data->conn)
 249                 return 0;
 250
 251         switch (transport->family) {
 252         case TRANSPORT_FAMILY_ALL: break;
 253         case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 254         case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 255         }
 256
 257         data->conn = git_connect(data->fd, transport->url,
 258                                  for_push ? data->options.receivepack :
 259                                  data->options.uploadpack,
 260                                  flags);
 261
 262         return 0;
 263 }
 264
 265 static void die_if_server_options(struct transport *transport)
 266 {
 267         if (!transport->server_options || !transport->server_options->nr)
 268                 return;
 269         advise(_("see protocol.version in 'git help config' for more details"));
 270         die(_("server options require protocol version 2 or later"));
 271 }
 272
 273 /*
 274  * Obtains the protocol version from the transport and writes it to
 275  * transport->data->version, first connecting if not already connected.
 276  *
 277  * If the protocol version is one that allows skipping the listing of remote
 278  * refs, and must_list_refs is 0, the listing of remote refs is skipped and
 279  * this function returns NULL. Otherwise, this function returns the list of
 280  * remote refs.
 281  */
 282 static struct ref *handshake(struct transport *transport, int for_push,
 283                              const struct strvec *ref_prefixes,
 284                              int must_list_refs)
 285 {
 286         struct git_transport_data *data = transport->data;
 287         struct ref *refs = NULL;
 288         struct packet_reader reader;
 289
 290         connect_setup(transport, for_push);
 291
 292         packet_reader_init(&reader, data->fd[0], NULL, 0,
 293                            PACKET_READ_CHOMP_NEWLINE |
 294                            PACKET_READ_GENTLE_ON_EOF |
 295                            PACKET_READ_DIE_ON_ERR_PACKET);
 296
 297         data->version = discover_version(&reader);
 298         switch (data->version) {
 299         case protocol_v2:
 300                 if (must_list_refs)
 301                         get_remote_refs(data->fd[1], &reader, &refs, for_push,
 302                                         ref_prefixes,
 303                                         transport->server_options,
 304                                         transport->stateless_rpc);
 305                 break;
 306         case protocol_v1:
 307         case protocol_v0:
 308                 die_if_server_options(transport);
 309                 get_remote_heads(&reader, &refs,
 310                                  for_push ? REF_NORMAL : 0,
 311                                  &data->extra_have,
 312                                  &data->shallow);
 313                 break;
 314         case protocol_unknown_version:
 315                 BUG("unknown protocol version");
 316         }
 317         data->got_remote_heads = 1;
 318         transport->hash_algo = reader.hash_algo;
 319
 320         if (reader.line_peeked)
 321                 BUG("buffer must be empty at the end of handshake()");
 322
 323         return refs;
 324 }
 325
 326 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
 327                                         const struct strvec *ref_prefixes)
 328 {
 329         return handshake(transport, for_push, ref_prefixes, 1);
 330 }
 331
 332 static int fetch_refs_via_pack(struct transport *transport,
 333                                int nr_heads, struct ref **to_fetch)
 334 {
 335         int ret = 0;
 336         struct git_transport_data *data = transport->data;
 337         struct ref *refs = NULL;
 338         struct fetch_pack_args args;
 339         struct ref *refs_tmp = NULL;
 340
 341         memset(&args, 0, sizeof(args));
 342         args.uploadpack = data->options.uploadpack;
 343         args.keep_pack = data->options.keep;
 344         args.lock_pack = 1;
 345         args.use_thin_pack = data->options.thin;
 346         args.include_tag = data->options.followtags;
 347         args.verbose = (transport->verbose > 1);
 348         args.quiet = (transport->verbose < 0);
 349         args.no_progress = !transport->progress;
 350         args.depth = data->options.depth;
 351         args.deepen_since = data->options.deepen_since;
 352         args.deepen_not = data->options.deepen_not;
 353         args.deepen_relative = data->options.deepen_relative;
 354         args.check_self_contained_and_connected =
 355                 data->options.check_self_contained_and_connected;
 356         args.cloning = transport->cloning;
 357         args.update_shallow = data->options.update_shallow;
 358         args.from_promisor = data->options.from_promisor;
 359         args.filter_options = data->options.filter_options;
 360         args.stateless_rpc = transport->stateless_rpc;
 361         args.server_options = transport->server_options;
 362         args.negotiation_tips = data->options.negotiation_tips;
 363
 364         if (!data->got_remote_heads) {
 365                 int i;
 366                 int must_list_refs = 0;
 367                 for (i = 0; i < nr_heads; i++) {
 368                         if (!to_fetch[i]->exact_oid) {
 369                                 must_list_refs = 1;
 370                                 break;
 371                         }
 372                 }
 373                 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
 374         }
 375
 376         if (data->version == protocol_unknown_version)
 377                 BUG("unknown protocol version");
 378         else if (data->version <= protocol_v1)
 379                 die_if_server_options(transport);
 380
 381         refs = fetch_pack(&args, data->fd,
 382                           refs_tmp ? refs_tmp : transport->remote_refs,
 383                           to_fetch, nr_heads, &data->shallow,
 384                           &transport->pack_lockfiles, data->version);
 385
 386         close(data->fd[0]);
 387         close(data->fd[1]);
 388         if (finish_connect(data->conn))
 389                 ret = -1;
 390         data->conn = NULL;
 391         data->got_remote_heads = 0;
 392         data->options.self_contained_and_connected =
 393                 args.self_contained_and_connected;
 394         data->options.connectivity_checked = args.connectivity_checked;
 395
 396         if (refs == NULL)
 397                 ret = -1;
 398         if (report_unmatched_refs(to_fetch, nr_heads))
 399                 ret = -1;
 400
 401         free_refs(refs_tmp);
 402         free_refs(refs);
 403         return ret;
 404 }
 405
 406 static int push_had_errors(struct ref *ref)
 407 {
 408         for (; ref; ref = ref->next) {
 409                 switch (ref->status) {
 410                 case REF_STATUS_NONE:
 411                 case REF_STATUS_UPTODATE:
 412                 case REF_STATUS_OK:
 413                         break;
 414                 default:
 415                         return 1;
 416                 }
 417         }
 418         return 0;
 419 }
 420
 421 int transport_refs_pushed(struct ref *ref)
 422 {
 423         for (; ref; ref = ref->next) {
 424                 switch(ref->status) {
 425                 case REF_STATUS_NONE:
 426                 case REF_STATUS_UPTODATE:
 427                         break;
 428                 default:
 429                         return 1;
 430                 }
 431         }
 432         return 0;
 433 }
 434
 435 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 436 {
 437         struct refspec_item rs;
 438
 439         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 440                 return;
 441
 442         memset(&rs, 0, sizeof(rs));
 443         rs.src = ref->name;
 444         rs.dst = NULL;
 445
 446         if (!remote_find_tracking(remote, &rs)) {
 447                 if (verbose)
 448                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 449                 if (ref->deletion) {
 450                         delete_ref(NULL, rs.dst, NULL, 0);
 451                 } else
 452                         update_ref("update by push", rs.dst, &ref->new_oid,
 453                                    NULL, 0, 0);
 454                 free(rs.dst);
 455         }
 456 }
 457
 458 static void print_ref_status(char flag, const char *summary,
 459                              struct ref *to, struct ref *from, const char *msg,
 460                              int porcelain, int summary_width)
 461 {
 462         if (porcelain) {
 463                 if (from)
 464                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 465                 else
 466                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
 467                 if (msg)
 468                         fprintf(stdout, "%s (%s)\n", summary, msg);
 469                 else
 470                         fprintf(stdout, "%s\n", summary);
 471         } else {
 472                 const char *red = "", *reset = "";
 473                 if (push_had_errors(to)) {
 474                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 475                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 476                 }
 477                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 478                         summary, reset);
 479                 if (from)
 480                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 481                 else
 482                         fputs(prettify_refname(to->name), stderr);
 483                 if (msg) {
 484                         fputs(" (", stderr);
 485                         fputs(msg, stderr);
 486                         fputc(')', stderr);
 487                 }
 488                 fputc('\n', stderr);
 489         }
 490 }
 491
 492 static void print_ok_ref_status(struct ref *ref, int porcelain, int summary_width)
 493 {
 494         if (ref->deletion)
 495                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 496                                  porcelain, summary_width);
 497         else if (is_null_oid(&ref->old_oid))
 498                 print_ref_status('*',
 499                         (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 500                         "[new branch]"),
 501                         ref, ref->peer_ref, NULL, porcelain, summary_width);
 502         else {
 503                 struct strbuf quickref = STRBUF_INIT;
 504                 char type;
 505                 const char *msg;
 506
 507                 strbuf_add_unique_abbrev(&quickref, &ref->old_oid,
 508                                          DEFAULT_ABBREV);
 509                 if (ref->forced_update) {
 510                         strbuf_addstr(&quickref, "...");
 511                         type = '+';
 512                         msg = "forced update";
 513                 } else {
 514                         strbuf_addstr(&quickref, "..");
 515                         type = ' ';
 516                         msg = NULL;
 517                 }
 518                 strbuf_add_unique_abbrev(&quickref, &ref->new_oid,
 519                                          DEFAULT_ABBREV);
 520
 521                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 522                                  porcelain, summary_width);
 523                 strbuf_release(&quickref);
 524         }
 525 }
 526
 527 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 528                                  int porcelain, int summary_width)
 529 {
 530         if (!count) {
 531                 char *url = transport_anonymize_url(dest);
 532                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 533                 free(url);
 534         }
 535
 536         switch(ref->status) {
 537         case REF_STATUS_NONE:
 538                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 539                                  porcelain, summary_width);
 540                 break;
 541         case REF_STATUS_REJECT_NODELETE:
 542                 print_ref_status('!', "[rejected]", ref, NULL,
 543                                  "remote does not support deleting refs",
 544                                  porcelain, summary_width);
 545                 break;
 546         case REF_STATUS_UPTODATE:
 547                 print_ref_status('=', "[up to date]", ref,
 548                                  ref->peer_ref, NULL, porcelain, summary_width);
 549                 break;
 550         case REF_STATUS_REJECT_NONFASTFORWARD:
 551                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 552                                  "non-fast-forward", porcelain, summary_width);
 553                 break;
 554         case REF_STATUS_REJECT_ALREADY_EXISTS:
 555                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 556                                  "already exists", porcelain, summary_width);
 557                 break;
 558         case REF_STATUS_REJECT_FETCH_FIRST:
 559                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 560                                  "fetch first", porcelain, summary_width);
 561                 break;
 562         case REF_STATUS_REJECT_NEEDS_FORCE:
 563                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 564                                  "needs force", porcelain, summary_width);
 565                 break;
 566         case REF_STATUS_REJECT_STALE:
 567                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 568                                  "stale info", porcelain, summary_width);
 569                 break;
 570         case REF_STATUS_REJECT_SHALLOW:
 571                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 572                                  "new shallow roots not allowed",
 573                                  porcelain, summary_width);
 574                 break;
 575         case REF_STATUS_REMOTE_REJECT:
 576                 print_ref_status('!', "[remote rejected]", ref,
 577                                  ref->deletion ? NULL : ref->peer_ref,
 578                                  ref->remote_status, porcelain, summary_width);
 579                 break;
 580         case REF_STATUS_EXPECTING_REPORT:
 581                 print_ref_status('!', "[remote failure]", ref,
 582                                  ref->deletion ? NULL : ref->peer_ref,
 583                                  "remote failed to report status",
 584                                  porcelain, summary_width);
 585                 break;
 586         case REF_STATUS_ATOMIC_PUSH_FAILED:
 587                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 588                                  "atomic push failed", porcelain, summary_width);
 589                 break;
 590         case REF_STATUS_OK:
 591                 print_ok_ref_status(ref, porcelain, summary_width);
 592                 break;
 593         }
 594
 595         return 1;
 596 }
 597
 598 static int measure_abbrev(const struct object_id *oid, int sofar)
 599 {
 600         char hex[GIT_MAX_HEXSZ + 1];
 601         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 602
 603         return (w < sofar) ? sofar : w;
 604 }
 605
 606 int transport_summary_width(const struct ref *refs)
 607 {
 608         int maxw = -1;
 609
 610         for (; refs; refs = refs->next) {
 611                 maxw = measure_abbrev(&refs->old_oid, maxw);
 612                 maxw = measure_abbrev(&refs->new_oid, maxw);
 613         }
 614         if (maxw < 0)
 615                 maxw = FALLBACK_DEFAULT_ABBREV;
 616         return (2 * maxw + 3);
 617 }
 618
 619 void transport_print_push_status(const char *dest, struct ref *refs,
 620                                   int verbose, int porcelain, unsigned int *reject_reasons)
 621 {
 622         struct ref *ref;
 623         int n = 0;
 624         char *head;
 625         int summary_width = transport_summary_width(refs);
 626
 627         if (transport_color_config() < 0)
 628                 warning(_("could not parse transport.color.* config"));
 629
 630         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 631
 632         if (verbose) {
 633                 for (ref = refs; ref; ref = ref->next)
 634                         if (ref->status == REF_STATUS_UPTODATE)
 635                                 n += print_one_push_status(ref, dest, n,
 636                                                            porcelain, summary_width);
 637         }
 638
 639         for (ref = refs; ref; ref = ref->next)
 640                 if (ref->status == REF_STATUS_OK)
 641                         n += print_one_push_status(ref, dest, n,
 642                                                    porcelain, summary_width);
 643
 644         *reject_reasons = 0;
 645         for (ref = refs; ref; ref = ref->next) {
 646                 if (ref->status != REF_STATUS_NONE &&
 647                     ref->status != REF_STATUS_UPTODATE &&
 648                     ref->status != REF_STATUS_OK)
 649                         n += print_one_push_status(ref, dest, n,
 650                                                    porcelain, summary_width);
 651                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 652                         if (head != NULL && !strcmp(head, ref->name))
 653                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 654                         else
 655                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 656                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 657                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 658                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 659                         *reject_reasons |= REJECT_FETCH_FIRST;
 660                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 661                         *reject_reasons |= REJECT_NEEDS_FORCE;
 662                 }
 663         }
 664         free(head);
 665 }
 666
 667 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 668 {
 669         struct git_transport_data *data = transport->data;
 670         struct send_pack_args args;
 671         int ret = 0;
 672
 673         if (transport_color_config() < 0)
 674                 return -1;
 675
 676         if (!data->got_remote_heads)
 677                 get_refs_via_connect(transport, 1, NULL);
 678
 679         memset(&args, 0, sizeof(args));
 680         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 681         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 682         args.use_thin_pack = data->options.thin;
 683         args.verbose = (transport->verbose > 0);
 684         args.quiet = (transport->verbose < 0);
 685         args.progress = transport->progress;
 686         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 687         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 688         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 689         args.push_options = transport->push_options;
 690         args.url = transport->url;
 691
 692         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 693                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 694         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 695                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 696         else
 697                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 698
 699         switch (data->version) {
 700         case protocol_v2:
 701                 die(_("support for protocol v2 not implemented yet"));
 702                 break;
 703         case protocol_v1:
 704         case protocol_v0:
 705                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 706                                 &data->extra_have);
 707                 break;
 708         case protocol_unknown_version:
 709                 BUG("unknown protocol version");
 710         }
 711
 712         close(data->fd[1]);
 713         close(data->fd[0]);
 714         /*
 715          * Atomic push may abort the connection early and close the pipe,
 716          * which may cause an error for `finish_connect()`. Ignore this error
 717          * for atomic git-push.
 718          */
 719         if (ret || args.atomic)
 720                 finish_connect(data->conn);
 721         else
 722                 ret = finish_connect(data->conn);
 723         data->conn = NULL;
 724         data->got_remote_heads = 0;
 725
 726         return ret;
 727 }
 728
 729 static int connect_git(struct transport *transport, const char *name,
 730                        const char *executable, int fd[2])
 731 {
 732         struct git_transport_data *data = transport->data;
 733         data->conn = git_connect(data->fd, transport->url,
 734                                  executable, 0);
 735         fd[0] = data->fd[0];
 736         fd[1] = data->fd[1];
 737         return 0;
 738 }
 739
 740 static int disconnect_git(struct transport *transport)
 741 {
 742         struct git_transport_data *data = transport->data;
 743         if (data->conn) {
 744                 if (data->got_remote_heads && !transport->stateless_rpc)
 745                         packet_flush(data->fd[1]);
 746                 close(data->fd[0]);
 747                 close(data->fd[1]);
 748                 finish_connect(data->conn);
 749         }
 750
 751         free(data);
 752         return 0;
 753 }
 754
 755 static struct transport_vtable taken_over_vtable = {
 756         NULL,
 757         get_refs_via_connect,
 758         fetch_refs_via_pack,
 759         git_transport_push,
 760         NULL,
 761         disconnect_git
 762 };
 763
 764 void transport_take_over(struct transport *transport,
 765                          struct child_process *child)
 766 {
 767         struct git_transport_data *data;
 768
 769         if (!transport->smart_options)
 770                 BUG("taking over transport requires non-NULL "
 771                     "smart_options field.");
 772
 773         data = xcalloc(1, sizeof(*data));
 774         data->options = *transport->smart_options;
 775         data->conn = child;
 776         data->fd[0] = data->conn->out;
 777         data->fd[1] = data->conn->in;
 778         data->got_remote_heads = 0;
 779         transport->data = data;
 780
 781         transport->vtable = &taken_over_vtable;
 782         transport->smart_options = &(data->options);
 783
 784         transport->cannot_reuse = 1;
 785 }
 786
 787 static int is_file(const char *url)
 788 {
 789         struct stat buf;
 790         if (stat(url, &buf))
 791                 return 0;
 792         return S_ISREG(buf.st_mode);
 793 }
 794
 795 static int external_specification_len(const char *url)
 796 {
 797         return strchr(url, ':') - url;
 798 }
 799
 800 static const struct string_list *protocol_whitelist(void)
 801 {
 802         static int enabled = -1;
 803         static struct string_list allowed = STRING_LIST_INIT_DUP;
 804
 805         if (enabled < 0) {
 806                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 807                 if (v) {
 808                         string_list_split(&allowed, v, ':', -1);
 809                         string_list_sort(&allowed);
 810                         enabled = 1;
 811                 } else {
 812                         enabled = 0;
 813                 }
 814         }
 815
 816         return enabled ? &allowed : NULL;
 817 }
 818
 819 enum protocol_allow_config {
 820         PROTOCOL_ALLOW_NEVER = 0,
 821         PROTOCOL_ALLOW_USER_ONLY,
 822         PROTOCOL_ALLOW_ALWAYS
 823 };
 824
 825 static enum protocol_allow_config parse_protocol_config(const char *key,
 826                                                         const char *value)
 827 {
 828         if (!strcasecmp(value, "always"))
 829                 return PROTOCOL_ALLOW_ALWAYS;
 830         else if (!strcasecmp(value, "never"))
 831                 return PROTOCOL_ALLOW_NEVER;
 832         else if (!strcasecmp(value, "user"))
 833                 return PROTOCOL_ALLOW_USER_ONLY;
 834
 835         die(_("unknown value for config '%s': %s"), key, value);
 836 }
 837
 838 static enum protocol_allow_config get_protocol_config(const char *type)
 839 {
 840         char *key = xstrfmt("protocol.%s.allow", type);
 841         char *value;
 842
 843         /* first check the per-protocol config */
 844         if (!git_config_get_string(key, &value)) {
 845                 enum protocol_allow_config ret =
 846                         parse_protocol_config(key, value);
 847                 free(key);
 848                 free(value);
 849                 return ret;
 850         }
 851         free(key);
 852
 853         /* if defined, fallback to user-defined default for unknown protocols */
 854         if (!git_config_get_string("protocol.allow", &value)) {
 855                 enum protocol_allow_config ret =
 856                         parse_protocol_config("protocol.allow", value);
 857                 free(value);
 858                 return ret;
 859         }
 860
 861         /* fallback to built-in defaults */
 862         /* known safe */
 863         if (!strcmp(type, "http") ||
 864             !strcmp(type, "https") ||
 865             !strcmp(type, "git") ||
 866             !strcmp(type, "ssh") ||
 867             !strcmp(type, "file"))
 868                 return PROTOCOL_ALLOW_ALWAYS;
 869
 870         /* known scary; err on the side of caution */
 871         if (!strcmp(type, "ext"))
 872                 return PROTOCOL_ALLOW_NEVER;
 873
 874         /* unknown; by default let them be used only directly by the user */
 875         return PROTOCOL_ALLOW_USER_ONLY;
 876 }
 877
 878 int is_transport_allowed(const char *type, int from_user)
 879 {
 880         const struct string_list *whitelist = protocol_whitelist();
 881         if (whitelist)
 882                 return string_list_has_string(whitelist, type);
 883
 884         switch (get_protocol_config(type)) {
 885         case PROTOCOL_ALLOW_ALWAYS:
 886                 return 1;
 887         case PROTOCOL_ALLOW_NEVER:
 888                 return 0;
 889         case PROTOCOL_ALLOW_USER_ONLY:
 890                 if (from_user < 0)
 891                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 892                 return from_user;
 893         }
 894
 895         BUG("invalid protocol_allow_config type");
 896 }
 897
 898 void transport_check_allowed(const char *type)
 899 {
 900         if (!is_transport_allowed(type, -1))
 901                 die(_("transport '%s' not allowed"), type);
 902 }
 903
 904 static struct transport_vtable bundle_vtable = {
 905         NULL,
 906         get_refs_from_bundle,
 907         fetch_refs_from_bundle,
 908         NULL,
 909         NULL,
 910         close_bundle
 911 };
 912
 913 static struct transport_vtable builtin_smart_vtable = {
 914         NULL,
 915         get_refs_via_connect,
 916         fetch_refs_via_pack,
 917         git_transport_push,
 918         connect_git,
 919         disconnect_git
 920 };
 921
 922 struct transport *transport_get(struct remote *remote, const char *url)
 923 {
 924         const char *helper;
 925         struct transport *ret = xcalloc(1, sizeof(*ret));
 926
 927         ret->progress = isatty(2);
 928         string_list_init(&ret->pack_lockfiles, 1);
 929
 930         if (!remote)
 931                 BUG("No remote provided to transport_get()");
 932
 933         ret->got_remote_refs = 0;
 934         ret->remote = remote;
 935         helper = remote->foreign_vcs;
 936
 937         if (!url && remote->url)
 938                 url = remote->url[0];
 939         ret->url = url;
 940
 941         /* maybe it is a foreign URL? */
 942         if (url) {
 943                 const char *p = url;
 944
 945                 while (is_urlschemechar(p == url, *p))
 946                         p++;
 947                 if (starts_with(p, "::"))
 948                         helper = xstrndup(url, p - url);
 949         }
 950
 951         if (helper) {
 952                 transport_helper_init(ret, helper);
 953         } else if (starts_with(url, "rsync:")) {
 954                 die(_("git-over-rsync is no longer supported"));
 955         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 956                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 957                 transport_check_allowed("file");
 958                 ret->data = data;
 959                 ret->vtable = &bundle_vtable;
 960                 ret->smart_options = NULL;
 961         } else if (!is_url(url)
 962                 || starts_with(url, "file://")
 963                 || starts_with(url, "git://")
 964                 || starts_with(url, "ssh://")
 965                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
 966                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
 967                 ) {
 968                 /*
 969                  * These are builtin smart transports; "allowed" transports
 970                  * will be checked individually in git_connect.
 971                  */
 972                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 973                 ret->data = data;
 974                 ret->vtable = &builtin_smart_vtable;
 975                 ret->smart_options = &(data->options);
 976
 977                 data->conn = NULL;
 978                 data->got_remote_heads = 0;
 979         } else {
 980                 /* Unknown protocol in URL. Pass to external handler. */
 981                 int len = external_specification_len(url);
 982                 char *handler = xmemdupz(url, len);
 983                 transport_helper_init(ret, handler);
 984         }
 985
 986         if (ret->smart_options) {
 987                 ret->smart_options->thin = 1;
 988                 ret->smart_options->uploadpack = "git-upload-pack";
 989                 if (remote->uploadpack)
 990                         ret->smart_options->uploadpack = remote->uploadpack;
 991                 ret->smart_options->receivepack = "git-receive-pack";
 992                 if (remote->receivepack)
 993                         ret->smart_options->receivepack = remote->receivepack;
 994         }
 995
 996         ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
 997
 998         return ret;
 999 }
1000
1001 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1002 {
1003         return transport->hash_algo;
1004 }
1005
1006 int transport_set_option(struct transport *transport,
1007                          const char *name, const char *value)
1008 {
1009         int git_reports = 1, protocol_reports = 1;
1010
1011         if (transport->smart_options)
1012                 git_reports = set_git_option(transport->smart_options,
1013                                              name, value);
1014
1015         if (transport->vtable->set_option)
1016                 protocol_reports = transport->vtable->set_option(transport,
1017                                                                  name, value);
1018
1019         /* If either report is 0, report 0 (success). */
1020         if (!git_reports || !protocol_reports)
1021                 return 0;
1022         /* If either reports -1 (invalid value), report -1. */
1023         if ((git_reports == -1) || (protocol_reports == -1))
1024                 return -1;
1025         /* Otherwise if both report unknown, report unknown. */
1026         return 1;
1027 }
1028
1029 void transport_set_verbosity(struct transport *transport, int verbosity,
1030         int force_progress)
1031 {
1032         if (verbosity >= 1)
1033                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1034         if (verbosity < 0)
1035                 transport->verbose = -1;
1036
1037         /**
1038          * Rules used to determine whether to report progress (processing aborts
1039          * when a rule is satisfied):
1040          *
1041          *   . Report progress, if force_progress is 1 (ie. --progress).
1042          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1043          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1044          *   . Report progress if isatty(2) is 1.
1045          **/
1046         if (force_progress >= 0)
1047                 transport->progress = !!force_progress;
1048         else
1049                 transport->progress = verbosity >= 0 && isatty(2);
1050 }
1051
1052 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1053 {
1054         int i;
1055
1056         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1057                         "not be found on any remote:\n"));
1058         for (i = 0; i < needs_pushing->nr; i++)
1059                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1060         fprintf(stderr, _("\nPlease try\n\n"
1061                           "     git push --recurse-submodules=on-demand\n\n"
1062                           "or cd to the path and use\n\n"
1063                           "     git push\n\n"
1064                           "to push them to a remote.\n\n"));
1065
1066         string_list_clear(needs_pushing, 0);
1067
1068         die(_("Aborting."));
1069 }
1070
1071 static int run_pre_push_hook(struct transport *transport,
1072                              struct ref *remote_refs)
1073 {
1074         int ret = 0, x;
1075         struct ref *r;
1076         struct child_process proc = CHILD_PROCESS_INIT;
1077         struct strbuf buf;
1078         const char *argv[4];
1079
1080         if (!(argv[0] = find_hook("pre-push")))
1081                 return 0;
1082
1083         argv[1] = transport->remote->name;
1084         argv[2] = transport->url;
1085         argv[3] = NULL;
1086
1087         proc.argv = argv;
1088         proc.in = -1;
1089         proc.trace2_hook_name = "pre-push";
1090
1091         if (start_command(&proc)) {
1092                 finish_command(&proc);
1093                 return -1;
1094         }
1095
1096         sigchain_push(SIGPIPE, SIG_IGN);
1097
1098         strbuf_init(&buf, 256);
1099
1100         for (r = remote_refs; r; r = r->next) {
1101                 if (!r->peer_ref) continue;
1102                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1103                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1104                 if (r->status == REF_STATUS_UPTODATE) continue;
1105
1106                 strbuf_reset(&buf);
1107                 strbuf_addf( &buf, "%s %s %s %s\n",
1108                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1109                          r->name, oid_to_hex(&r->old_oid));
1110
1111                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1112                         /* We do not mind if a hook does not read all refs. */
1113                         if (errno != EPIPE)
1114                                 ret = -1;
1115                         break;
1116                 }
1117         }
1118
1119         strbuf_release(&buf);
1120
1121         x = close(proc.in);
1122         if (!ret)
1123                 ret = x;
1124
1125         sigchain_pop(SIGPIPE);
1126
1127         x = finish_command(&proc);
1128         if (!ret)
1129                 ret = x;
1130
1131         return ret;
1132 }
1133
1134 int transport_push(struct repository *r,
1135                    struct transport *transport,
1136                    struct refspec *rs, int flags,
1137                    unsigned int *reject_reasons)
1138 {
1139         *reject_reasons = 0;
1140
1141         if (transport_color_config() < 0)
1142                 return -1;
1143
1144         if (transport->vtable->push_refs) {
1145                 struct ref *remote_refs;
1146                 struct ref *local_refs = get_local_heads();
1147                 int match_flags = MATCH_REFS_NONE;
1148                 int verbose = (transport->verbose > 0);
1149                 int quiet = (transport->verbose < 0);
1150                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1151                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1152                 int push_ret, ret, err;
1153                 struct strvec ref_prefixes = STRVEC_INIT;
1154
1155                 if (check_push_refs(local_refs, rs) < 0)
1156                         return -1;
1157
1158                 refspec_ref_prefixes(rs, &ref_prefixes);
1159
1160                 trace2_region_enter("transport_push", "get_refs_list", r);
1161                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1162                                                                &ref_prefixes);
1163                 trace2_region_leave("transport_push", "get_refs_list", r);
1164
1165                 strvec_clear(&ref_prefixes);
1166
1167                 if (flags & TRANSPORT_PUSH_ALL)
1168                         match_flags |= MATCH_REFS_ALL;
1169                 if (flags & TRANSPORT_PUSH_MIRROR)
1170                         match_flags |= MATCH_REFS_MIRROR;
1171                 if (flags & TRANSPORT_PUSH_PRUNE)
1172                         match_flags |= MATCH_REFS_PRUNE;
1173                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1174                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1175
1176                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1177                         return -1;
1178
1179                 if (transport->smart_options &&
1180                     transport->smart_options->cas &&
1181                     !is_empty_cas(transport->smart_options->cas))
1182                         apply_push_cas(transport->smart_options->cas,
1183                                        transport->remote, remote_refs);
1184
1185                 set_ref_status_for_push(remote_refs,
1186                         flags & TRANSPORT_PUSH_MIRROR,
1187                         flags & TRANSPORT_PUSH_FORCE);
1188
1189                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1190                         if (run_pre_push_hook(transport, remote_refs))
1191                                 return -1;
1192
1193                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1194                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1195                     !is_bare_repository()) {
1196                         struct ref *ref = remote_refs;
1197                         struct oid_array commits = OID_ARRAY_INIT;
1198
1199                         trace2_region_enter("transport_push", "push_submodules", r);
1200                         for (; ref; ref = ref->next)
1201                                 if (!is_null_oid(&ref->new_oid))
1202                                         oid_array_append(&commits,
1203                                                           &ref->new_oid);
1204
1205                         if (!push_unpushed_submodules(r,
1206                                                       &commits,
1207                                                       transport->remote,
1208                                                       rs,
1209                                                       transport->push_options,
1210                                                       pretend)) {
1211                                 oid_array_clear(&commits);
1212                                 trace2_region_leave("transport_push", "push_submodules", r);
1213                                 die(_("failed to push all needed submodules"));
1214                         }
1215                         oid_array_clear(&commits);
1216                         trace2_region_leave("transport_push", "push_submodules", r);
1217                 }
1218
1219                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1220                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1221                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1222                       !pretend)) && !is_bare_repository()) {
1223                         struct ref *ref = remote_refs;
1224                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1225                         struct oid_array commits = OID_ARRAY_INIT;
1226
1227                         trace2_region_enter("transport_push", "check_submodules", r);
1228                         for (; ref; ref = ref->next)
1229                                 if (!is_null_oid(&ref->new_oid))
1230                                         oid_array_append(&commits,
1231                                                           &ref->new_oid);
1232
1233                         if (find_unpushed_submodules(r,
1234                                                      &commits,
1235                                                      transport->remote->name,
1236                                                      &needs_pushing)) {
1237                                 oid_array_clear(&commits);
1238                                 trace2_region_leave("transport_push", "check_submodules", r);
1239                                 die_with_unpushed_submodules(&needs_pushing);
1240                         }
1241                         string_list_clear(&needs_pushing, 0);
1242                         oid_array_clear(&commits);
1243                         trace2_region_leave("transport_push", "check_submodules", r);
1244                 }
1245
1246                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1247                         trace2_region_enter("transport_push", "push_refs", r);
1248                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1249                         trace2_region_leave("transport_push", "push_refs", r);
1250                 } else
1251                         push_ret = 0;
1252                 err = push_had_errors(remote_refs);
1253                 ret = push_ret | err;
1254
1255                 if (!quiet || err)
1256                         transport_print_push_status(transport->url, remote_refs,
1257                                         verbose | porcelain, porcelain,
1258                                         reject_reasons);
1259
1260                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1261                         set_upstreams(transport, remote_refs, pretend);
1262
1263                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1264                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1265                         struct ref *ref;
1266                         for (ref = remote_refs; ref; ref = ref->next)
1267                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1268                 }
1269
1270                 if (porcelain && !push_ret)
1271                         puts("Done");
1272                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1273                         fprintf(stderr, "Everything up-to-date\n");
1274
1275                 return ret;
1276         }
1277         return 1;
1278 }
1279
1280 const struct ref *transport_get_remote_refs(struct transport *transport,
1281                                             const struct strvec *ref_prefixes)
1282 {
1283         if (!transport->got_remote_refs) {
1284                 transport->remote_refs =
1285                         transport->vtable->get_refs_list(transport, 0,
1286                                                          ref_prefixes);
1287                 transport->got_remote_refs = 1;
1288         }
1289
1290         return transport->remote_refs;
1291 }
1292
1293 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1294 {
1295         int rc;
1296         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1297         struct ref **heads = NULL;
1298         struct ref *rm;
1299
1300         for (rm = refs; rm; rm = rm->next) {
1301                 nr_refs++;
1302                 if (rm->peer_ref &&
1303                     !is_null_oid(&rm->old_oid) &&
1304                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1305                         continue;
1306                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1307                 heads[nr_heads++] = rm;
1308         }
1309
1310         if (!nr_heads) {
1311                 /*
1312                  * When deepening of a shallow repository is requested,
1313                  * then local and remote refs are likely to still be equal.
1314                  * Just feed them all to the fetch method in that case.
1315                  * This condition shouldn't be met in a non-deepening fetch
1316                  * (see builtin/fetch.c:quickfetch()).
1317                  */
1318                 ALLOC_ARRAY(heads, nr_refs);
1319                 for (rm = refs; rm; rm = rm->next)
1320                         heads[nr_heads++] = rm;
1321         }
1322
1323         rc = transport->vtable->fetch(transport, nr_heads, heads);
1324
1325         free(heads);
1326         return rc;
1327 }
1328
1329 void transport_unlock_pack(struct transport *transport)
1330 {
1331         int i;
1332
1333         for (i = 0; i < transport->pack_lockfiles.nr; i++)
1334                 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1335         string_list_clear(&transport->pack_lockfiles, 0);
1336 }
1337
1338 int transport_connect(struct transport *transport, const char *name,
1339                       const char *exec, int fd[2])
1340 {
1341         if (transport->vtable->connect)
1342                 return transport->vtable->connect(transport, name, exec, fd);
1343         else
1344                 die(_("operation not supported by protocol"));
1345 }
1346
1347 int transport_disconnect(struct transport *transport)
1348 {
1349         int ret = 0;
1350         if (transport->vtable->disconnect)
1351                 ret = transport->vtable->disconnect(transport);
1352         free(transport);
1353         return ret;
1354 }
1355
1356 /*
1357  * Strip username (and password) from a URL and return
1358  * it in a newly allocated string.
1359  */
1360 char *transport_anonymize_url(const char *url)
1361 {
1362         char *scheme_prefix, *anon_part;
1363         size_t anon_len, prefix_len = 0;
1364
1365         anon_part = strchr(url, '@');
1366         if (url_is_local_not_ssh(url) || !anon_part)
1367                 goto literal_copy;
1368
1369         anon_len = strlen(++anon_part);
1370         scheme_prefix = strstr(url, "://");
1371         if (!scheme_prefix) {
1372                 if (!strchr(anon_part, ':'))
1373                         /* cannot be "me@there:/path/name" */
1374                         goto literal_copy;
1375         } else {
1376                 const char *cp;
1377                 /* make sure scheme is reasonable */
1378                 for (cp = url; cp < scheme_prefix; cp++) {
1379                         switch (*cp) {
1380                                 /* RFC 1738 2.1 */
1381                         case '+': case '.': case '-':
1382                                 break; /* ok */
1383                         default:
1384                                 if (isalnum(*cp))
1385                                         break;
1386                                 /* it isn't */
1387                                 goto literal_copy;
1388                         }
1389                 }
1390                 /* @ past the first slash does not count */
1391                 cp = strchr(scheme_prefix + 3, '/');
1392                 if (cp && cp < anon_part)
1393                         goto literal_copy;
1394                 prefix_len = scheme_prefix - url + 3;
1395         }
1396         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1397                        (int)anon_len, anon_part);
1398 literal_copy:
1399         return xstrdup(url);
1400 }