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