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                              struct ref_push_report *report,
 465                              int porcelain, int summary_width)
 466 {
 467         const char *to_name;
 468
 469         if (report && report->ref_name)
 470                 to_name = report->ref_name;
 471         else
 472                 to_name = to->name;
 473
 474         if (porcelain) {
 475                 if (from)
 476                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 477                 else
 478                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 479                 if (msg)
 480                         fprintf(stdout, "%s (%s)\n", summary, msg);
 481                 else
 482                         fprintf(stdout, "%s\n", summary);
 483         } else {
 484                 const char *red = "", *reset = "";
 485                 if (push_had_errors(to)) {
 486                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 487                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 488                 }
 489                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 490                         summary, reset);
 491                 if (from)
 492                         fprintf(stderr, "%s -> %s",
 493                                 prettify_refname(from->name),
 494                                 prettify_refname(to_name));
 495                 else
 496                         fputs(prettify_refname(to_name), stderr);
 497                 if (msg) {
 498                         fputs(" (", stderr);
 499                         fputs(msg, stderr);
 500                         fputc(')', stderr);
 501                 }
 502                 fputc('\n', stderr);
 503         }
 504 }
 505
 506 static void print_ok_ref_status(struct ref *ref,
 507                                 struct ref_push_report *report,
 508                                 int porcelain, int summary_width)
 509 {
 510         struct object_id *old_oid;
 511         struct object_id *new_oid;
 512         const char *ref_name;
 513         int forced_update;
 514
 515         if (report && report->old_oid)
 516                 old_oid = report->old_oid;
 517         else
 518                 old_oid = &ref->old_oid;
 519         if (report && report->new_oid)
 520                 new_oid = report->new_oid;
 521         else
 522                 new_oid = &ref->new_oid;
 523         if (report && report->forced_update)
 524                 forced_update = report->forced_update;
 525         else
 526                 forced_update = ref->forced_update;
 527         if (report && report->ref_name)
 528                 ref_name = report->ref_name;
 529         else
 530                 ref_name = ref->name;
 531
 532         if (ref->deletion)
 533                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 534                                  report, porcelain, summary_width);
 535         else if (is_null_oid(old_oid))
 536                 print_ref_status('*',
 537                                  (starts_with(ref_name, "refs/tags/")
 538                                   ? "[new tag]"
 539                                   : (starts_with(ref_name, "refs/heads/")
 540                                      ? "[new branch]"
 541                                      : "[new reference]")),
 542                                  ref, ref->peer_ref, NULL,
 543                                  report, porcelain, summary_width);
 544         else {
 545                 struct strbuf quickref = STRBUF_INIT;
 546                 char type;
 547                 const char *msg;
 548
 549                 strbuf_add_unique_abbrev(&quickref, old_oid,
 550                                          DEFAULT_ABBREV);
 551                 if (forced_update) {
 552                         strbuf_addstr(&quickref, "...");
 553                         type = '+';
 554                         msg = "forced update";
 555                 } else {
 556                         strbuf_addstr(&quickref, "..");
 557                         type = ' ';
 558                         msg = NULL;
 559                 }
 560                 strbuf_add_unique_abbrev(&quickref, new_oid,
 561                                          DEFAULT_ABBREV);
 562
 563                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 564                                  report, porcelain, summary_width);
 565                 strbuf_release(&quickref);
 566         }
 567 }
 568
 569 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 570                                  struct ref_push_report *report,
 571                                  int porcelain, int summary_width)
 572 {
 573         if (!count) {
 574                 char *url = transport_anonymize_url(dest);
 575                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 576                 free(url);
 577         }
 578
 579         switch(ref->status) {
 580         case REF_STATUS_NONE:
 581                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 582                                  report, porcelain, summary_width);
 583                 break;
 584         case REF_STATUS_REJECT_NODELETE:
 585                 print_ref_status('!', "[rejected]", ref, NULL,
 586                                  "remote does not support deleting refs",
 587                                  report, porcelain, summary_width);
 588                 break;
 589         case REF_STATUS_UPTODATE:
 590                 print_ref_status('=', "[up to date]", ref,
 591                                  ref->peer_ref, NULL,
 592                                  report, porcelain, summary_width);
 593                 break;
 594         case REF_STATUS_REJECT_NONFASTFORWARD:
 595                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 596                                  "non-fast-forward",
 597                                  report, porcelain, summary_width);
 598                 break;
 599         case REF_STATUS_REJECT_ALREADY_EXISTS:
 600                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 601                                  "already exists",
 602                                  report, porcelain, summary_width);
 603                 break;
 604         case REF_STATUS_REJECT_FETCH_FIRST:
 605                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 606                                  "fetch first",
 607                                  report, porcelain, summary_width);
 608                 break;
 609         case REF_STATUS_REJECT_NEEDS_FORCE:
 610                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 611                                  "needs force",
 612                                  report, porcelain, summary_width);
 613                 break;
 614         case REF_STATUS_REJECT_STALE:
 615                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 616                                  "stale info",
 617                                  report, porcelain, summary_width);
 618                 break;
 619         case REF_STATUS_REJECT_SHALLOW:
 620                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 621                                  "new shallow roots not allowed",
 622                                  report, porcelain, summary_width);
 623                 break;
 624         case REF_STATUS_REMOTE_REJECT:
 625                 print_ref_status('!', "[remote rejected]", ref,
 626                                  ref->deletion ? NULL : ref->peer_ref,
 627                                  ref->remote_status,
 628                                  report, porcelain, summary_width);
 629                 break;
 630         case REF_STATUS_EXPECTING_REPORT:
 631                 print_ref_status('!', "[remote failure]", ref,
 632                                  ref->deletion ? NULL : ref->peer_ref,
 633                                  "remote failed to report status",
 634                                  report, porcelain, summary_width);
 635                 break;
 636         case REF_STATUS_ATOMIC_PUSH_FAILED:
 637                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 638                                  "atomic push failed",
 639                                  report, porcelain, summary_width);
 640                 break;
 641         case REF_STATUS_OK:
 642                 print_ok_ref_status(ref, report, porcelain, summary_width);
 643                 break;
 644         }
 645
 646         return 1;
 647 }
 648
 649 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 650                                  int porcelain, int summary_width)
 651 {
 652         struct ref_push_report *report;
 653         int n = 0;
 654
 655         if (!ref->report)
 656                 return print_one_push_report(ref, dest, count,
 657                                              NULL, porcelain, summary_width);
 658
 659         for (report = ref->report; report; report = report->next)
 660                 print_one_push_report(ref, dest, count + n++,
 661                                       report, porcelain, summary_width);
 662         return n;
 663 }
 664
 665 static int measure_abbrev(const struct object_id *oid, int sofar)
 666 {
 667         char hex[GIT_MAX_HEXSZ + 1];
 668         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 669
 670         return (w < sofar) ? sofar : w;
 671 }
 672
 673 int transport_summary_width(const struct ref *refs)
 674 {
 675         int maxw = -1;
 676
 677         for (; refs; refs = refs->next) {
 678                 maxw = measure_abbrev(&refs->old_oid, maxw);
 679                 maxw = measure_abbrev(&refs->new_oid, maxw);
 680         }
 681         if (maxw < 0)
 682                 maxw = FALLBACK_DEFAULT_ABBREV;
 683         return (2 * maxw + 3);
 684 }
 685
 686 void transport_print_push_status(const char *dest, struct ref *refs,
 687                                   int verbose, int porcelain, unsigned int *reject_reasons)
 688 {
 689         struct ref *ref;
 690         int n = 0;
 691         char *head;
 692         int summary_width = transport_summary_width(refs);
 693
 694         if (transport_color_config() < 0)
 695                 warning(_("could not parse transport.color.* config"));
 696
 697         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 698
 699         if (verbose) {
 700                 for (ref = refs; ref; ref = ref->next)
 701                         if (ref->status == REF_STATUS_UPTODATE)
 702                                 n += print_one_push_status(ref, dest, n,
 703                                                            porcelain, summary_width);
 704         }
 705
 706         for (ref = refs; ref; ref = ref->next)
 707                 if (ref->status == REF_STATUS_OK)
 708                         n += print_one_push_status(ref, dest, n,
 709                                                    porcelain, summary_width);
 710
 711         *reject_reasons = 0;
 712         for (ref = refs; ref; ref = ref->next) {
 713                 if (ref->status != REF_STATUS_NONE &&
 714                     ref->status != REF_STATUS_UPTODATE &&
 715                     ref->status != REF_STATUS_OK)
 716                         n += print_one_push_status(ref, dest, n,
 717                                                    porcelain, summary_width);
 718                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 719                         if (head != NULL && !strcmp(head, ref->name))
 720                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 721                         else
 722                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 723                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 724                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 725                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 726                         *reject_reasons |= REJECT_FETCH_FIRST;
 727                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 728                         *reject_reasons |= REJECT_NEEDS_FORCE;
 729                 }
 730         }
 731         free(head);
 732 }
 733
 734 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 735 {
 736         struct git_transport_data *data = transport->data;
 737         struct send_pack_args args;
 738         int ret = 0;
 739
 740         if (transport_color_config() < 0)
 741                 return -1;
 742
 743         if (!data->got_remote_heads)
 744                 get_refs_via_connect(transport, 1, NULL);
 745
 746         memset(&args, 0, sizeof(args));
 747         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 748         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 749         args.use_thin_pack = data->options.thin;
 750         args.verbose = (transport->verbose > 0);
 751         args.quiet = (transport->verbose < 0);
 752         args.progress = transport->progress;
 753         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 754         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 755         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 756         args.push_options = transport->push_options;
 757         args.url = transport->url;
 758
 759         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 760                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 761         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 762                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 763         else
 764                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 765
 766         switch (data->version) {
 767         case protocol_v2:
 768                 die(_("support for protocol v2 not implemented yet"));
 769                 break;
 770         case protocol_v1:
 771         case protocol_v0:
 772                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 773                                 &data->extra_have);
 774                 break;
 775         case protocol_unknown_version:
 776                 BUG("unknown protocol version");
 777         }
 778
 779         close(data->fd[1]);
 780         close(data->fd[0]);
 781         /*
 782          * Atomic push may abort the connection early and close the pipe,
 783          * which may cause an error for `finish_connect()`. Ignore this error
 784          * for atomic git-push.
 785          */
 786         if (ret || args.atomic)
 787                 finish_connect(data->conn);
 788         else
 789                 ret = finish_connect(data->conn);
 790         data->conn = NULL;
 791         data->got_remote_heads = 0;
 792
 793         return ret;
 794 }
 795
 796 static int connect_git(struct transport *transport, const char *name,
 797                        const char *executable, int fd[2])
 798 {
 799         struct git_transport_data *data = transport->data;
 800         data->conn = git_connect(data->fd, transport->url,
 801                                  executable, 0);
 802         fd[0] = data->fd[0];
 803         fd[1] = data->fd[1];
 804         return 0;
 805 }
 806
 807 static int disconnect_git(struct transport *transport)
 808 {
 809         struct git_transport_data *data = transport->data;
 810         if (data->conn) {
 811                 if (data->got_remote_heads && !transport->stateless_rpc)
 812                         packet_flush(data->fd[1]);
 813                 close(data->fd[0]);
 814                 close(data->fd[1]);
 815                 finish_connect(data->conn);
 816         }
 817
 818         free(data);
 819         return 0;
 820 }
 821
 822 static struct transport_vtable taken_over_vtable = {
 823         NULL,
 824         get_refs_via_connect,
 825         fetch_refs_via_pack,
 826         git_transport_push,
 827         NULL,
 828         disconnect_git
 829 };
 830
 831 void transport_take_over(struct transport *transport,
 832                          struct child_process *child)
 833 {
 834         struct git_transport_data *data;
 835
 836         if (!transport->smart_options)
 837                 BUG("taking over transport requires non-NULL "
 838                     "smart_options field.");
 839
 840         data = xcalloc(1, sizeof(*data));
 841         data->options = *transport->smart_options;
 842         data->conn = child;
 843         data->fd[0] = data->conn->out;
 844         data->fd[1] = data->conn->in;
 845         data->got_remote_heads = 0;
 846         transport->data = data;
 847
 848         transport->vtable = &taken_over_vtable;
 849         transport->smart_options = &(data->options);
 850
 851         transport->cannot_reuse = 1;
 852 }
 853
 854 static int is_file(const char *url)
 855 {
 856         struct stat buf;
 857         if (stat(url, &buf))
 858                 return 0;
 859         return S_ISREG(buf.st_mode);
 860 }
 861
 862 static int external_specification_len(const char *url)
 863 {
 864         return strchr(url, ':') - url;
 865 }
 866
 867 static const struct string_list *protocol_whitelist(void)
 868 {
 869         static int enabled = -1;
 870         static struct string_list allowed = STRING_LIST_INIT_DUP;
 871
 872         if (enabled < 0) {
 873                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 874                 if (v) {
 875                         string_list_split(&allowed, v, ':', -1);
 876                         string_list_sort(&allowed);
 877                         enabled = 1;
 878                 } else {
 879                         enabled = 0;
 880                 }
 881         }
 882
 883         return enabled ? &allowed : NULL;
 884 }
 885
 886 enum protocol_allow_config {
 887         PROTOCOL_ALLOW_NEVER = 0,
 888         PROTOCOL_ALLOW_USER_ONLY,
 889         PROTOCOL_ALLOW_ALWAYS
 890 };
 891
 892 static enum protocol_allow_config parse_protocol_config(const char *key,
 893                                                         const char *value)
 894 {
 895         if (!strcasecmp(value, "always"))
 896                 return PROTOCOL_ALLOW_ALWAYS;
 897         else if (!strcasecmp(value, "never"))
 898                 return PROTOCOL_ALLOW_NEVER;
 899         else if (!strcasecmp(value, "user"))
 900                 return PROTOCOL_ALLOW_USER_ONLY;
 901
 902         die(_("unknown value for config '%s': %s"), key, value);
 903 }
 904
 905 static enum protocol_allow_config get_protocol_config(const char *type)
 906 {
 907         char *key = xstrfmt("protocol.%s.allow", type);
 908         char *value;
 909
 910         /* first check the per-protocol config */
 911         if (!git_config_get_string(key, &value)) {
 912                 enum protocol_allow_config ret =
 913                         parse_protocol_config(key, value);
 914                 free(key);
 915                 free(value);
 916                 return ret;
 917         }
 918         free(key);
 919
 920         /* if defined, fallback to user-defined default for unknown protocols */
 921         if (!git_config_get_string("protocol.allow", &value)) {
 922                 enum protocol_allow_config ret =
 923                         parse_protocol_config("protocol.allow", value);
 924                 free(value);
 925                 return ret;
 926         }
 927
 928         /* fallback to built-in defaults */
 929         /* known safe */
 930         if (!strcmp(type, "http") ||
 931             !strcmp(type, "https") ||
 932             !strcmp(type, "git") ||
 933             !strcmp(type, "ssh") ||
 934             !strcmp(type, "file"))
 935                 return PROTOCOL_ALLOW_ALWAYS;
 936
 937         /* known scary; err on the side of caution */
 938         if (!strcmp(type, "ext"))
 939                 return PROTOCOL_ALLOW_NEVER;
 940
 941         /* unknown; by default let them be used only directly by the user */
 942         return PROTOCOL_ALLOW_USER_ONLY;
 943 }
 944
 945 int is_transport_allowed(const char *type, int from_user)
 946 {
 947         const struct string_list *whitelist = protocol_whitelist();
 948         if (whitelist)
 949                 return string_list_has_string(whitelist, type);
 950
 951         switch (get_protocol_config(type)) {
 952         case PROTOCOL_ALLOW_ALWAYS:
 953                 return 1;
 954         case PROTOCOL_ALLOW_NEVER:
 955                 return 0;
 956         case PROTOCOL_ALLOW_USER_ONLY:
 957                 if (from_user < 0)
 958                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 959                 return from_user;
 960         }
 961
 962         BUG("invalid protocol_allow_config type");
 963 }
 964
 965 void transport_check_allowed(const char *type)
 966 {
 967         if (!is_transport_allowed(type, -1))
 968                 die(_("transport '%s' not allowed"), type);
 969 }
 970
 971 static struct transport_vtable bundle_vtable = {
 972         NULL,
 973         get_refs_from_bundle,
 974         fetch_refs_from_bundle,
 975         NULL,
 976         NULL,
 977         close_bundle
 978 };
 979
 980 static struct transport_vtable builtin_smart_vtable = {
 981         NULL,
 982         get_refs_via_connect,
 983         fetch_refs_via_pack,
 984         git_transport_push,
 985         connect_git,
 986         disconnect_git
 987 };
 988
 989 struct transport *transport_get(struct remote *remote, const char *url)
 990 {
 991         const char *helper;
 992         struct transport *ret = xcalloc(1, sizeof(*ret));
 993
 994         ret->progress = isatty(2);
 995
 996         if (!remote)
 997                 BUG("No remote provided to transport_get()");
 998
 999         ret->got_remote_refs = 0;
1000         ret->remote = remote;
1001         helper = remote->foreign_vcs;
1002
1003         if (!url && remote->url)
1004                 url = remote->url[0];
1005         ret->url = url;
1006
1007         /* maybe it is a foreign URL? */
1008         if (url) {
1009                 const char *p = url;
1010
1011                 while (is_urlschemechar(p == url, *p))
1012                         p++;
1013                 if (starts_with(p, "::"))
1014                         helper = xstrndup(url, p - url);
1015         }
1016
1017         if (helper) {
1018                 transport_helper_init(ret, helper);
1019         } else if (starts_with(url, "rsync:")) {
1020                 die(_("git-over-rsync is no longer supported"));
1021         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1022                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1023                 transport_check_allowed("file");
1024                 ret->data = data;
1025                 ret->vtable = &bundle_vtable;
1026                 ret->smart_options = NULL;
1027         } else if (!is_url(url)
1028                 || starts_with(url, "file://")
1029                 || starts_with(url, "git://")
1030                 || starts_with(url, "ssh://")
1031                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1032                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1033                 ) {
1034                 /*
1035                  * These are builtin smart transports; "allowed" transports
1036                  * will be checked individually in git_connect.
1037                  */
1038                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1039                 ret->data = data;
1040                 ret->vtable = &builtin_smart_vtable;
1041                 ret->smart_options = &(data->options);
1042
1043                 data->conn = NULL;
1044                 data->got_remote_heads = 0;
1045         } else {
1046                 /* Unknown protocol in URL. Pass to external handler. */
1047                 int len = external_specification_len(url);
1048                 char *handler = xmemdupz(url, len);
1049                 transport_helper_init(ret, handler);
1050         }
1051
1052         if (ret->smart_options) {
1053                 ret->smart_options->thin = 1;
1054                 ret->smart_options->uploadpack = "git-upload-pack";
1055                 if (remote->uploadpack)
1056                         ret->smart_options->uploadpack = remote->uploadpack;
1057                 ret->smart_options->receivepack = "git-receive-pack";
1058                 if (remote->receivepack)
1059                         ret->smart_options->receivepack = remote->receivepack;
1060         }
1061
1062         return ret;
1063 }
1064
1065 int transport_set_option(struct transport *transport,
1066                          const char *name, const char *value)
1067 {
1068         int git_reports = 1, protocol_reports = 1;
1069
1070         if (transport->smart_options)
1071                 git_reports = set_git_option(transport->smart_options,
1072                                              name, value);
1073
1074         if (transport->vtable->set_option)
1075                 protocol_reports = transport->vtable->set_option(transport,
1076                                                                  name, value);
1077
1078         /* If either report is 0, report 0 (success). */
1079         if (!git_reports || !protocol_reports)
1080                 return 0;
1081         /* If either reports -1 (invalid value), report -1. */
1082         if ((git_reports == -1) || (protocol_reports == -1))
1083                 return -1;
1084         /* Otherwise if both report unknown, report unknown. */
1085         return 1;
1086 }
1087
1088 void transport_set_verbosity(struct transport *transport, int verbosity,
1089         int force_progress)
1090 {
1091         if (verbosity >= 1)
1092                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1093         if (verbosity < 0)
1094                 transport->verbose = -1;
1095
1096         /**
1097          * Rules used to determine whether to report progress (processing aborts
1098          * when a rule is satisfied):
1099          *
1100          *   . Report progress, if force_progress is 1 (ie. --progress).
1101          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1102          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1103          *   . Report progress if isatty(2) is 1.
1104          **/
1105         if (force_progress >= 0)
1106                 transport->progress = !!force_progress;
1107         else
1108                 transport->progress = verbosity >= 0 && isatty(2);
1109 }
1110
1111 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1112 {
1113         int i;
1114
1115         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1116                         "not be found on any remote:\n"));
1117         for (i = 0; i < needs_pushing->nr; i++)
1118                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1119         fprintf(stderr, _("\nPlease try\n\n"
1120                           "     git push --recurse-submodules=on-demand\n\n"
1121                           "or cd to the path and use\n\n"
1122                           "     git push\n\n"
1123                           "to push them to a remote.\n\n"));
1124
1125         string_list_clear(needs_pushing, 0);
1126
1127         die(_("Aborting."));
1128 }
1129
1130 static int run_pre_push_hook(struct transport *transport,
1131                              struct ref *remote_refs)
1132 {
1133         int ret = 0, x;
1134         struct ref *r;
1135         struct child_process proc = CHILD_PROCESS_INIT;
1136         struct strbuf buf;
1137         const char *argv[4];
1138
1139         if (!(argv[0] = find_hook("pre-push")))
1140                 return 0;
1141
1142         argv[1] = transport->remote->name;
1143         argv[2] = transport->url;
1144         argv[3] = NULL;
1145
1146         proc.argv = argv;
1147         proc.in = -1;
1148         proc.trace2_hook_name = "pre-push";
1149
1150         if (start_command(&proc)) {
1151                 finish_command(&proc);
1152                 return -1;
1153         }
1154
1155         sigchain_push(SIGPIPE, SIG_IGN);
1156
1157         strbuf_init(&buf, 256);
1158
1159         for (r = remote_refs; r; r = r->next) {
1160                 if (!r->peer_ref) continue;
1161                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1162                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1163                 if (r->status == REF_STATUS_UPTODATE) continue;
1164
1165                 strbuf_reset(&buf);
1166                 strbuf_addf( &buf, "%s %s %s %s\n",
1167                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1168                          r->name, oid_to_hex(&r->old_oid));
1169
1170                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1171                         /* We do not mind if a hook does not read all refs. */
1172                         if (errno != EPIPE)
1173                                 ret = -1;
1174                         break;
1175                 }
1176         }
1177
1178         strbuf_release(&buf);
1179
1180         x = close(proc.in);
1181         if (!ret)
1182                 ret = x;
1183
1184         sigchain_pop(SIGPIPE);
1185
1186         x = finish_command(&proc);
1187         if (!ret)
1188                 ret = x;
1189
1190         return ret;
1191 }
1192
1193 int transport_push(struct repository *r,
1194                    struct transport *transport,
1195                    struct refspec *rs, int flags,
1196                    unsigned int *reject_reasons)
1197 {
1198         *reject_reasons = 0;
1199
1200         if (transport_color_config() < 0)
1201                 return -1;
1202
1203         if (transport->vtable->push_refs) {
1204                 struct ref *remote_refs;
1205                 struct ref *local_refs = get_local_heads();
1206                 int match_flags = MATCH_REFS_NONE;
1207                 int verbose = (transport->verbose > 0);
1208                 int quiet = (transport->verbose < 0);
1209                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1210                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1211                 int push_ret, ret, err;
1212                 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1213
1214                 if (check_push_refs(local_refs, rs) < 0)
1215                         return -1;
1216
1217                 refspec_ref_prefixes(rs, &ref_prefixes);
1218
1219                 trace2_region_enter("transport_push", "get_refs_list", r);
1220                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1221                                                                &ref_prefixes);
1222                 trace2_region_leave("transport_push", "get_refs_list", r);
1223
1224                 argv_array_clear(&ref_prefixes);
1225
1226                 if (flags & TRANSPORT_PUSH_ALL)
1227                         match_flags |= MATCH_REFS_ALL;
1228                 if (flags & TRANSPORT_PUSH_MIRROR)
1229                         match_flags |= MATCH_REFS_MIRROR;
1230                 if (flags & TRANSPORT_PUSH_PRUNE)
1231                         match_flags |= MATCH_REFS_PRUNE;
1232                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1233                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1234
1235                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1236                         return -1;
1237
1238                 if (transport->smart_options &&
1239                     transport->smart_options->cas &&
1240                     !is_empty_cas(transport->smart_options->cas))
1241                         apply_push_cas(transport->smart_options->cas,
1242                                        transport->remote, remote_refs);
1243
1244                 set_ref_status_for_push(remote_refs,
1245                         flags & TRANSPORT_PUSH_MIRROR,
1246                         flags & TRANSPORT_PUSH_FORCE);
1247
1248                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1249                         if (run_pre_push_hook(transport, remote_refs))
1250                                 return -1;
1251
1252                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1253                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1254                     !is_bare_repository()) {
1255                         struct ref *ref = remote_refs;
1256                         struct oid_array commits = OID_ARRAY_INIT;
1257
1258                         trace2_region_enter("transport_push", "push_submodules", r);
1259                         for (; ref; ref = ref->next)
1260                                 if (!is_null_oid(&ref->new_oid))
1261                                         oid_array_append(&commits,
1262                                                           &ref->new_oid);
1263
1264                         if (!push_unpushed_submodules(r,
1265                                                       &commits,
1266                                                       transport->remote,
1267                                                       rs,
1268                                                       transport->push_options,
1269                                                       pretend)) {
1270                                 oid_array_clear(&commits);
1271                                 trace2_region_leave("transport_push", "push_submodules", r);
1272                                 die(_("failed to push all needed submodules"));
1273                         }
1274                         oid_array_clear(&commits);
1275                         trace2_region_leave("transport_push", "push_submodules", r);
1276                 }
1277
1278                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1279                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1280                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1281                       !pretend)) && !is_bare_repository()) {
1282                         struct ref *ref = remote_refs;
1283                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1284                         struct oid_array commits = OID_ARRAY_INIT;
1285
1286                         trace2_region_enter("transport_push", "check_submodules", r);
1287                         for (; ref; ref = ref->next)
1288                                 if (!is_null_oid(&ref->new_oid))
1289                                         oid_array_append(&commits,
1290                                                           &ref->new_oid);
1291
1292                         if (find_unpushed_submodules(r,
1293                                                      &commits,
1294                                                      transport->remote->name,
1295                                                      &needs_pushing)) {
1296                                 oid_array_clear(&commits);
1297                                 trace2_region_leave("transport_push", "check_submodules", r);
1298                                 die_with_unpushed_submodules(&needs_pushing);
1299                         }
1300                         string_list_clear(&needs_pushing, 0);
1301                         oid_array_clear(&commits);
1302                         trace2_region_leave("transport_push", "check_submodules", r);
1303                 }
1304
1305                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1306                         trace2_region_enter("transport_push", "push_refs", r);
1307                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1308                         trace2_region_leave("transport_push", "push_refs", r);
1309                 } else
1310                         push_ret = 0;
1311                 err = push_had_errors(remote_refs);
1312                 ret = push_ret | err;
1313
1314                 if (!quiet || err)
1315                         transport_print_push_status(transport->url, remote_refs,
1316                                         verbose | porcelain, porcelain,
1317                                         reject_reasons);
1318
1319                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1320                         set_upstreams(transport, remote_refs, pretend);
1321
1322                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1323                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1324                         struct ref *ref;
1325                         for (ref = remote_refs; ref; ref = ref->next)
1326                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1327                 }
1328
1329                 if (porcelain && !push_ret)
1330                         puts("Done");
1331                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1332                         fprintf(stderr, "Everything up-to-date\n");
1333
1334                 return ret;
1335         }
1336         return 1;
1337 }
1338
1339 const struct ref *transport_get_remote_refs(struct transport *transport,
1340                                             const struct argv_array *ref_prefixes)
1341 {
1342         if (!transport->got_remote_refs) {
1343                 transport->remote_refs =
1344                         transport->vtable->get_refs_list(transport, 0,
1345                                                          ref_prefixes);
1346                 transport->got_remote_refs = 1;
1347         }
1348
1349         return transport->remote_refs;
1350 }
1351
1352 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1353 {
1354         int rc;
1355         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1356         struct ref **heads = NULL;
1357         struct ref *rm;
1358
1359         for (rm = refs; rm; rm = rm->next) {
1360                 nr_refs++;
1361                 if (rm->peer_ref &&
1362                     !is_null_oid(&rm->old_oid) &&
1363                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1364                         continue;
1365                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1366                 heads[nr_heads++] = rm;
1367         }
1368
1369         if (!nr_heads) {
1370                 /*
1371                  * When deepening of a shallow repository is requested,
1372                  * then local and remote refs are likely to still be equal.
1373                  * Just feed them all to the fetch method in that case.
1374                  * This condition shouldn't be met in a non-deepening fetch
1375                  * (see builtin/fetch.c:quickfetch()).
1376                  */
1377                 ALLOC_ARRAY(heads, nr_refs);
1378                 for (rm = refs; rm; rm = rm->next)
1379                         heads[nr_heads++] = rm;
1380         }
1381
1382         rc = transport->vtable->fetch(transport, nr_heads, heads);
1383
1384         free(heads);
1385         return rc;
1386 }
1387
1388 void transport_unlock_pack(struct transport *transport)
1389 {
1390         if (transport->pack_lockfile) {
1391                 unlink_or_warn(transport->pack_lockfile);
1392                 FREE_AND_NULL(transport->pack_lockfile);
1393         }
1394 }
1395
1396 int transport_connect(struct transport *transport, const char *name,
1397                       const char *exec, int fd[2])
1398 {
1399         if (transport->vtable->connect)
1400                 return transport->vtable->connect(transport, name, exec, fd);
1401         else
1402                 die(_("operation not supported by protocol"));
1403 }
1404
1405 int transport_disconnect(struct transport *transport)
1406 {
1407         int ret = 0;
1408         if (transport->vtable->disconnect)
1409                 ret = transport->vtable->disconnect(transport);
1410         free(transport);
1411         return ret;
1412 }
1413
1414 /*
1415  * Strip username (and password) from a URL and return
1416  * it in a newly allocated string.
1417  */
1418 char *transport_anonymize_url(const char *url)
1419 {
1420         char *scheme_prefix, *anon_part;
1421         size_t anon_len, prefix_len = 0;
1422
1423         anon_part = strchr(url, '@');
1424         if (url_is_local_not_ssh(url) || !anon_part)
1425                 goto literal_copy;
1426
1427         anon_len = strlen(++anon_part);
1428         scheme_prefix = strstr(url, "://");
1429         if (!scheme_prefix) {
1430                 if (!strchr(anon_part, ':'))
1431                         /* cannot be "me@there:/path/name" */
1432                         goto literal_copy;
1433         } else {
1434                 const char *cp;
1435                 /* make sure scheme is reasonable */
1436                 for (cp = url; cp < scheme_prefix; cp++) {
1437                         switch (*cp) {
1438                                 /* RFC 1738 2.1 */
1439                         case '+': case '.': case '-':
1440                                 break; /* ok */
1441                         default:
1442                                 if (isalnum(*cp))
1443                                         break;
1444                                 /* it isn't */
1445                                 goto literal_copy;
1446                         }
1447                 }
1448                 /* @ past the first slash does not count */
1449                 cp = strchr(scheme_prefix + 3, '/');
1450                 if (cp && cp < anon_part)
1451                         goto literal_copy;
1452                 prefix_len = scheme_prefix - url + 3;
1453         }
1454         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1455                        (int)anon_len, anon_part);
1456 literal_copy:
1457         return xstrdup(url);
1458 }