transport.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "transport.h"
   4 #include "run-command.h"
   5 #include "pkt-line.h"
   6 #include "fetch-pack.h"
   7 #include "remote.h"
   8 #include "connect.h"
   9 #include "send-pack.h"
  10 #include "walker.h"
  11 #include "bundle.h"
  12 #include "dir.h"
  13 #include "refs.h"
  14 #include "refspec.h"
  15 #include "branch.h"
  16 #include "url.h"
  17 #include "submodule.h"
  18 #include "string-list.h"
  19 #include "oid-array.h"
  20 #include "sigchain.h"
  21 #include "transport-internal.h"
  22 #include "protocol.h"
  23 #include "object-store.h"
  24 #include "color.h"
  25
  26 static int transport_use_color = -1;
  27 static char transport_colors[][COLOR_MAXLEN] = {
  28         GIT_COLOR_RESET,
  29         GIT_COLOR_RED           /* REJECTED */
  30 };
  31
  32 enum color_transport {
  33         TRANSPORT_COLOR_RESET = 0,
  34         TRANSPORT_COLOR_REJECTED = 1
  35 };
  36
  37 static int transport_color_config(void)
  38 {
  39         const char *keys[] = {
  40                 "color.transport.reset",
  41                 "color.transport.rejected"
  42         }, *key = "color.transport";
  43         char *value;
  44         int i;
  45         static int initialized;
  46
  47         if (initialized)
  48                 return 0;
  49         initialized = 1;
  50
  51         if (!git_config_get_string(key, &value))
  52                 transport_use_color = git_config_colorbool(key, value);
  53
  54         if (!want_color_stderr(transport_use_color))
  55                 return 0;
  56
  57         for (i = 0; i < ARRAY_SIZE(keys); i++)
  58                 if (!git_config_get_string(keys[i], &value)) {
  59                         if (!value)
  60                                 return config_error_nonbool(keys[i]);
  61                         if (color_parse(value, transport_colors[i]) < 0)
  62                                 return -1;
  63                 }
  64
  65         return 0;
  66 }
  67
  68 static const char *transport_get_color(enum color_transport ix)
  69 {
  70         if (want_color_stderr(transport_use_color))
  71                 return transport_colors[ix];
  72         return "";
  73 }
  74
  75 static void set_upstreams(struct transport *transport, struct ref *refs,
  76         int pretend)
  77 {
  78         struct ref *ref;
  79         for (ref = refs; ref; ref = ref->next) {
  80                 const char *localname;
  81                 const char *tmp;
  82                 const char *remotename;
  83                 int flag = 0;
  84                 /*
  85                  * Check suitability for tracking. Must be successful /
  86                  * already up-to-date ref create/modify (not delete).
  87                  */
  88                 if (ref->status != REF_STATUS_OK &&
  89                         ref->status != REF_STATUS_UPTODATE)
  90                         continue;
  91                 if (!ref->peer_ref)
  92                         continue;
  93                 if (is_null_oid(&ref->new_oid))
  94                         continue;
  95
  96                 /* Follow symbolic refs (mainly for HEAD). */
  97                 localname = ref->peer_ref->name;
  98                 remotename = ref->name;
  99                 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
 100                                          NULL, &flag);
 101                 if (tmp && flag & REF_ISSYMREF &&
 102                         starts_with(tmp, "refs/heads/"))
 103                         localname = tmp;
 104
 105                 /* Both source and destination must be local branches. */
 106                 if (!localname || !starts_with(localname, "refs/heads/"))
 107                         continue;
 108                 if (!remotename || !starts_with(remotename, "refs/heads/"))
 109                         continue;
 110
 111                 if (!pretend)
 112                         install_branch_config(BRANCH_CONFIG_VERBOSE,
 113                                 localname + 11, transport->remote->name,
 114                                 remotename);
 115                 else
 116                         printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
 117                                 localname + 11, remotename + 11,
 118                                 transport->remote->name);
 119         }
 120 }
 121
 122 struct bundle_transport_data {
 123         int fd;
 124         struct bundle_header header;
 125         unsigned get_refs_from_bundle_called : 1;
 126 };
 127
 128 static struct ref *get_refs_from_bundle(struct transport *transport,
 129                                         int for_push,
 130                                         const struct strvec *ref_prefixes)
 131 {
 132         struct bundle_transport_data *data = transport->data;
 133         struct ref *result = NULL;
 134         int i;
 135
 136         if (for_push)
 137                 return NULL;
 138
 139         data->get_refs_from_bundle_called = 1;
 140
 141         if (data->fd > 0)
 142                 close(data->fd);
 143         data->fd = read_bundle_header(transport->url, &data->header);
 144         if (data->fd < 0)
 145                 die(_("could not read bundle '%s'"), transport->url);
 146
 147         transport->hash_algo = data->header.hash_algo;
 148
 149         for (i = 0; i < data->header.references.nr; i++) {
 150                 struct ref_list_entry *e = data->header.references.list + i;
 151                 struct ref *ref = alloc_ref(e->name);
 152                 oidcpy(&ref->old_oid, &e->oid);
 153                 ref->next = result;
 154                 result = ref;
 155         }
 156         return result;
 157 }
 158
 159 static int fetch_refs_from_bundle(struct transport *transport,
 160                                int nr_heads, struct ref **to_fetch)
 161 {
 162         struct bundle_transport_data *data = transport->data;
 163         int ret;
 164
 165         if (!data->get_refs_from_bundle_called)
 166                 get_refs_from_bundle(transport, 0, NULL);
 167         ret = unbundle(the_repository, &data->header, data->fd,
 168                            transport->progress ? BUNDLE_VERBOSE : 0);
 169         transport->hash_algo = data->header.hash_algo;
 170         return ret;
 171 }
 172
 173 static int close_bundle(struct transport *transport)
 174 {
 175         struct bundle_transport_data *data = transport->data;
 176         if (data->fd > 0)
 177                 close(data->fd);
 178         free(data);
 179         return 0;
 180 }
 181
 182 struct git_transport_data {
 183         struct git_transport_options options;
 184         struct child_process *conn;
 185         int fd[2];
 186         unsigned got_remote_heads : 1;
 187         enum protocol_version version;
 188         struct oid_array extra_have;
 189         struct oid_array shallow;
 190 };
 191
 192 static int set_git_option(struct git_transport_options *opts,
 193                           const char *name, const char *value)
 194 {
 195         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 196                 opts->uploadpack = value;
 197                 return 0;
 198         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 199                 opts->receivepack = value;
 200                 return 0;
 201         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 202                 opts->thin = !!value;
 203                 return 0;
 204         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 205                 opts->followtags = !!value;
 206                 return 0;
 207         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 208                 opts->keep = !!value;
 209                 return 0;
 210         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 211                 opts->update_shallow = !!value;
 212                 return 0;
 213         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 214                 if (!value)
 215                         opts->depth = 0;
 216                 else {
 217                         char *end;
 218                         opts->depth = strtol(value, &end, 0);
 219                         if (*end)
 220                                 die(_("transport: invalid depth option '%s'"), value);
 221                 }
 222                 return 0;
 223         } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 224                 opts->deepen_since = value;
 225                 return 0;
 226         } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 227                 opts->deepen_not = (const struct string_list *)value;
 228                 return 0;
 229         } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 230                 opts->deepen_relative = !!value;
 231                 return 0;
 232         } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
 233                 opts->from_promisor = !!value;
 234                 return 0;
 235         } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
 236                 list_objects_filter_die_if_populated(&opts->filter_options);
 237                 parse_list_objects_filter(&opts->filter_options, value);
 238                 return 0;
 239         }
 240         return 1;
 241 }
 242
 243 static int connect_setup(struct transport *transport, int for_push)
 244 {
 245         struct git_transport_data *data = transport->data;
 246         int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 247
 248         if (data->conn)
 249                 return 0;
 250
 251         switch (transport->family) {
 252         case TRANSPORT_FAMILY_ALL: break;
 253         case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 254         case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 255         }
 256
 257         data->conn = git_connect(data->fd, transport->url,
 258                                  for_push ? data->options.receivepack :
 259                                  data->options.uploadpack,
 260                                  flags);
 261
 262         return 0;
 263 }
 264
 265 static void die_if_server_options(struct transport *transport)
 266 {
 267         if (!transport->server_options || !transport->server_options->nr)
 268                 return;
 269         advise(_("see protocol.version in 'git help config' for more details"));
 270         die(_("server options require protocol version 2 or later"));
 271 }
 272
 273 /*
 274  * Obtains the protocol version from the transport and writes it to
 275  * transport->data->version, first connecting if not already connected.
 276  *
 277  * If the protocol version is one that allows skipping the listing of remote
 278  * refs, and must_list_refs is 0, the listing of remote refs is skipped and
 279  * this function returns NULL. Otherwise, this function returns the list of
 280  * remote refs.
 281  */
 282 static struct ref *handshake(struct transport *transport, int for_push,
 283                              const struct strvec *ref_prefixes,
 284                              int must_list_refs)
 285 {
 286         struct git_transport_data *data = transport->data;
 287         struct ref *refs = NULL;
 288         struct packet_reader reader;
 289
 290         connect_setup(transport, for_push);
 291
 292         packet_reader_init(&reader, data->fd[0], NULL, 0,
 293                            PACKET_READ_CHOMP_NEWLINE |
 294                            PACKET_READ_GENTLE_ON_EOF |
 295                            PACKET_READ_DIE_ON_ERR_PACKET);
 296
 297         data->version = discover_version(&reader);
 298         switch (data->version) {
 299         case protocol_v2:
 300                 if (must_list_refs)
 301                         get_remote_refs(data->fd[1], &reader, &refs, for_push,
 302                                         ref_prefixes,
 303                                         transport->server_options,
 304                                         transport->stateless_rpc);
 305                 break;
 306         case protocol_v1:
 307         case protocol_v0:
 308                 die_if_server_options(transport);
 309                 get_remote_heads(&reader, &refs,
 310                                  for_push ? REF_NORMAL : 0,
 311                                  &data->extra_have,
 312                                  &data->shallow);
 313                 break;
 314         case protocol_unknown_version:
 315                 BUG("unknown protocol version");
 316         }
 317         data->got_remote_heads = 1;
 318         transport->hash_algo = reader.hash_algo;
 319
 320         if (reader.line_peeked)
 321                 BUG("buffer must be empty at the end of handshake()");
 322
 323         return refs;
 324 }
 325
 326 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
 327                                         const struct strvec *ref_prefixes)
 328 {
 329         return handshake(transport, for_push, ref_prefixes, 1);
 330 }
 331
 332 static int fetch_refs_via_pack(struct transport *transport,
 333                                int nr_heads, struct ref **to_fetch)
 334 {
 335         int ret = 0;
 336         struct git_transport_data *data = transport->data;
 337         struct ref *refs = NULL;
 338         struct fetch_pack_args args;
 339         struct ref *refs_tmp = NULL;
 340
 341         memset(&args, 0, sizeof(args));
 342         args.uploadpack = data->options.uploadpack;
 343         args.keep_pack = data->options.keep;
 344         args.lock_pack = 1;
 345         args.use_thin_pack = data->options.thin;
 346         args.include_tag = data->options.followtags;
 347         args.verbose = (transport->verbose > 1);
 348         args.quiet = (transport->verbose < 0);
 349         args.no_progress = !transport->progress;
 350         args.depth = data->options.depth;
 351         args.deepen_since = data->options.deepen_since;
 352         args.deepen_not = data->options.deepen_not;
 353         args.deepen_relative = data->options.deepen_relative;
 354         args.check_self_contained_and_connected =
 355                 data->options.check_self_contained_and_connected;
 356         args.cloning = transport->cloning;
 357         args.update_shallow = data->options.update_shallow;
 358         args.from_promisor = data->options.from_promisor;
 359         args.filter_options = data->options.filter_options;
 360         args.stateless_rpc = transport->stateless_rpc;
 361         args.server_options = transport->server_options;
 362         args.negotiation_tips = data->options.negotiation_tips;
 363
 364         if (!data->got_remote_heads) {
 365                 int i;
 366                 int must_list_refs = 0;
 367                 for (i = 0; i < nr_heads; i++) {
 368                         if (!to_fetch[i]->exact_oid) {
 369                                 must_list_refs = 1;
 370                                 break;
 371                         }
 372                 }
 373                 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
 374         }
 375
 376         if (data->version == protocol_unknown_version)
 377                 BUG("unknown protocol version");
 378         else if (data->version <= protocol_v1)
 379                 die_if_server_options(transport);
 380
 381         refs = fetch_pack(&args, data->fd,
 382                           refs_tmp ? refs_tmp : transport->remote_refs,
 383                           to_fetch, nr_heads, &data->shallow,
 384                           &transport->pack_lockfiles, data->version);
 385
 386         close(data->fd[0]);
 387         close(data->fd[1]);
 388         if (finish_connect(data->conn))
 389                 ret = -1;
 390         data->conn = NULL;
 391         data->got_remote_heads = 0;
 392         data->options.self_contained_and_connected =
 393                 args.self_contained_and_connected;
 394         data->options.connectivity_checked = args.connectivity_checked;
 395
 396         if (refs == NULL)
 397                 ret = -1;
 398         if (report_unmatched_refs(to_fetch, nr_heads))
 399                 ret = -1;
 400
 401         free_refs(refs_tmp);
 402         free_refs(refs);
 403         return ret;
 404 }
 405
 406 static int push_had_errors(struct ref *ref)
 407 {
 408         for (; ref; ref = ref->next) {
 409                 switch (ref->status) {
 410                 case REF_STATUS_NONE:
 411                 case REF_STATUS_UPTODATE:
 412                 case REF_STATUS_OK:
 413                         break;
 414                 default:
 415                         return 1;
 416                 }
 417         }
 418         return 0;
 419 }
 420
 421 int transport_refs_pushed(struct ref *ref)
 422 {
 423         for (; ref; ref = ref->next) {
 424                 switch(ref->status) {
 425                 case REF_STATUS_NONE:
 426                 case REF_STATUS_UPTODATE:
 427                         break;
 428                 default:
 429                         return 1;
 430                 }
 431         }
 432         return 0;
 433 }
 434
 435 static void update_one_tracking_ref(struct remote *remote, char *refname,
 436                                     struct object_id *new_oid, int deletion,
 437                                     int verbose)
 438 {
 439         struct refspec_item rs;
 440
 441         memset(&rs, 0, sizeof(rs));
 442         rs.src = refname;
 443         rs.dst = NULL;
 444
 445         if (!remote_find_tracking(remote, &rs)) {
 446                 if (verbose)
 447                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 448                 if (deletion)
 449                         delete_ref(NULL, rs.dst, NULL, 0);
 450                 else
 451                         update_ref("update by push", rs.dst, new_oid,
 452                                    NULL, 0, 0);
 453                 free(rs.dst);
 454         }
 455 }
 456
 457 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 458 {
 459         char *refname;
 460         struct object_id *new_oid;
 461         struct ref_push_report *report;
 462
 463         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 464                 return;
 465
 466         report = ref->report;
 467         if (!report)
 468                 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
 469                                         ref->deletion, verbose);
 470         else
 471                 for (; report; report = report->next) {
 472                         refname = report->ref_name ? (char *)report->ref_name : ref->name;
 473                         new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
 474                         update_one_tracking_ref(remote, refname, new_oid,
 475                                                 is_null_oid(new_oid), verbose);
 476                 }
 477 }
 478
 479 static void print_ref_status(char flag, const char *summary,
 480                              struct ref *to, struct ref *from, const char *msg,
 481                              struct ref_push_report *report,
 482                              int porcelain, int summary_width)
 483 {
 484         const char *to_name;
 485
 486         if (report && report->ref_name)
 487                 to_name = report->ref_name;
 488         else
 489                 to_name = to->name;
 490
 491         if (porcelain) {
 492                 if (from)
 493                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 494                 else
 495                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 496                 if (msg)
 497                         fprintf(stdout, "%s (%s)\n", summary, msg);
 498                 else
 499                         fprintf(stdout, "%s\n", summary);
 500         } else {
 501                 const char *red = "", *reset = "";
 502                 if (push_had_errors(to)) {
 503                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 504                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 505                 }
 506                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 507                         summary, reset);
 508                 if (from)
 509                         fprintf(stderr, "%s -> %s",
 510                                 prettify_refname(from->name),
 511                                 prettify_refname(to_name));
 512                 else
 513                         fputs(prettify_refname(to_name), stderr);
 514                 if (msg) {
 515                         fputs(" (", stderr);
 516                         fputs(msg, stderr);
 517                         fputc(')', stderr);
 518                 }
 519                 fputc('\n', stderr);
 520         }
 521 }
 522
 523 static void print_ok_ref_status(struct ref *ref,
 524                                 struct ref_push_report *report,
 525                                 int porcelain, int summary_width)
 526 {
 527         struct object_id *old_oid;
 528         struct object_id *new_oid;
 529         const char *ref_name;
 530         int forced_update;
 531
 532         if (report && report->old_oid)
 533                 old_oid = report->old_oid;
 534         else
 535                 old_oid = &ref->old_oid;
 536         if (report && report->new_oid)
 537                 new_oid = report->new_oid;
 538         else
 539                 new_oid = &ref->new_oid;
 540         if (report && report->forced_update)
 541                 forced_update = report->forced_update;
 542         else
 543                 forced_update = ref->forced_update;
 544         if (report && report->ref_name)
 545                 ref_name = report->ref_name;
 546         else
 547                 ref_name = ref->name;
 548
 549         if (ref->deletion)
 550                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 551                                  report, porcelain, summary_width);
 552         else if (is_null_oid(old_oid))
 553                 print_ref_status('*',
 554                                  (starts_with(ref_name, "refs/tags/")
 555                                   ? "[new tag]"
 556                                   : (starts_with(ref_name, "refs/heads/")
 557                                      ? "[new branch]"
 558                                      : "[new reference]")),
 559                                  ref, ref->peer_ref, NULL,
 560                                  report, porcelain, summary_width);
 561         else {
 562                 struct strbuf quickref = STRBUF_INIT;
 563                 char type;
 564                 const char *msg;
 565
 566                 strbuf_add_unique_abbrev(&quickref, old_oid,
 567                                          DEFAULT_ABBREV);
 568                 if (forced_update) {
 569                         strbuf_addstr(&quickref, "...");
 570                         type = '+';
 571                         msg = "forced update";
 572                 } else {
 573                         strbuf_addstr(&quickref, "..");
 574                         type = ' ';
 575                         msg = NULL;
 576                 }
 577                 strbuf_add_unique_abbrev(&quickref, new_oid,
 578                                          DEFAULT_ABBREV);
 579
 580                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 581                                  report, porcelain, summary_width);
 582                 strbuf_release(&quickref);
 583         }
 584 }
 585
 586 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 587                                  struct ref_push_report *report,
 588                                  int porcelain, int summary_width)
 589 {
 590         if (!count) {
 591                 char *url = transport_anonymize_url(dest);
 592                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 593                 free(url);
 594         }
 595
 596         switch(ref->status) {
 597         case REF_STATUS_NONE:
 598                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 599                                  report, porcelain, summary_width);
 600                 break;
 601         case REF_STATUS_REJECT_NODELETE:
 602                 print_ref_status('!', "[rejected]", ref, NULL,
 603                                  "remote does not support deleting refs",
 604                                  report, porcelain, summary_width);
 605                 break;
 606         case REF_STATUS_UPTODATE:
 607                 print_ref_status('=', "[up to date]", ref,
 608                                  ref->peer_ref, NULL,
 609                                  report, porcelain, summary_width);
 610                 break;
 611         case REF_STATUS_REJECT_NONFASTFORWARD:
 612                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 613                                  "non-fast-forward",
 614                                  report, porcelain, summary_width);
 615                 break;
 616         case REF_STATUS_REJECT_ALREADY_EXISTS:
 617                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 618                                  "already exists",
 619                                  report, porcelain, summary_width);
 620                 break;
 621         case REF_STATUS_REJECT_FETCH_FIRST:
 622                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 623                                  "fetch first",
 624                                  report, porcelain, summary_width);
 625                 break;
 626         case REF_STATUS_REJECT_NEEDS_FORCE:
 627                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 628                                  "needs force",
 629                                  report, porcelain, summary_width);
 630                 break;
 631         case REF_STATUS_REJECT_STALE:
 632                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 633                                  "stale info",
 634                                  report, porcelain, summary_width);
 635                 break;
 636         case REF_STATUS_REJECT_REMOTE_UPDATED:
 637                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 638                                  "remote ref updated since checkout",
 639                                  report, porcelain, summary_width);
 640                 break;
 641         case REF_STATUS_REJECT_SHALLOW:
 642                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 643                                  "new shallow roots not allowed",
 644                                  report, porcelain, summary_width);
 645                 break;
 646         case REF_STATUS_REMOTE_REJECT:
 647                 print_ref_status('!', "[remote rejected]", ref,
 648                                  ref->deletion ? NULL : ref->peer_ref,
 649                                  ref->remote_status,
 650                                  report, porcelain, summary_width);
 651                 break;
 652         case REF_STATUS_EXPECTING_REPORT:
 653                 print_ref_status('!', "[remote failure]", ref,
 654                                  ref->deletion ? NULL : ref->peer_ref,
 655                                  "remote failed to report status",
 656                                  report, porcelain, summary_width);
 657                 break;
 658         case REF_STATUS_ATOMIC_PUSH_FAILED:
 659                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 660                                  "atomic push failed",
 661                                  report, porcelain, summary_width);
 662                 break;
 663         case REF_STATUS_OK:
 664                 print_ok_ref_status(ref, report, porcelain, summary_width);
 665                 break;
 666         }
 667
 668         return 1;
 669 }
 670
 671 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 672                                  int porcelain, int summary_width)
 673 {
 674         struct ref_push_report *report;
 675         int n = 0;
 676
 677         if (!ref->report)
 678                 return print_one_push_report(ref, dest, count,
 679                                              NULL, porcelain, summary_width);
 680
 681         for (report = ref->report; report; report = report->next)
 682                 print_one_push_report(ref, dest, count + n++,
 683                                       report, porcelain, summary_width);
 684         return n;
 685 }
 686
 687 static int measure_abbrev(const struct object_id *oid, int sofar)
 688 {
 689         char hex[GIT_MAX_HEXSZ + 1];
 690         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 691
 692         return (w < sofar) ? sofar : w;
 693 }
 694
 695 int transport_summary_width(const struct ref *refs)
 696 {
 697         int maxw = -1;
 698
 699         for (; refs; refs = refs->next) {
 700                 maxw = measure_abbrev(&refs->old_oid, maxw);
 701                 maxw = measure_abbrev(&refs->new_oid, maxw);
 702         }
 703         if (maxw < 0)
 704                 maxw = FALLBACK_DEFAULT_ABBREV;
 705         return (2 * maxw + 3);
 706 }
 707
 708 void transport_print_push_status(const char *dest, struct ref *refs,
 709                                   int verbose, int porcelain, unsigned int *reject_reasons)
 710 {
 711         struct ref *ref;
 712         int n = 0;
 713         char *head;
 714         int summary_width = transport_summary_width(refs);
 715
 716         if (transport_color_config() < 0)
 717                 warning(_("could not parse transport.color.* config"));
 718
 719         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 720
 721         if (verbose) {
 722                 for (ref = refs; ref; ref = ref->next)
 723                         if (ref->status == REF_STATUS_UPTODATE)
 724                                 n += print_one_push_status(ref, dest, n,
 725                                                            porcelain, summary_width);
 726         }
 727
 728         for (ref = refs; ref; ref = ref->next)
 729                 if (ref->status == REF_STATUS_OK)
 730                         n += print_one_push_status(ref, dest, n,
 731                                                    porcelain, summary_width);
 732
 733         *reject_reasons = 0;
 734         for (ref = refs; ref; ref = ref->next) {
 735                 if (ref->status != REF_STATUS_NONE &&
 736                     ref->status != REF_STATUS_UPTODATE &&
 737                     ref->status != REF_STATUS_OK)
 738                         n += print_one_push_status(ref, dest, n,
 739                                                    porcelain, summary_width);
 740                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 741                         if (head != NULL && !strcmp(head, ref->name))
 742                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 743                         else
 744                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 745                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 746                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 747                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 748                         *reject_reasons |= REJECT_FETCH_FIRST;
 749                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 750                         *reject_reasons |= REJECT_NEEDS_FORCE;
 751                 } else if (ref->status == REF_STATUS_REJECT_REMOTE_UPDATED) {
 752                         *reject_reasons |= REJECT_REF_NEEDS_UPDATE;
 753                 }
 754         }
 755         free(head);
 756 }
 757
 758 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 759 {
 760         struct git_transport_data *data = transport->data;
 761         struct send_pack_args args;
 762         int ret = 0;
 763
 764         if (transport_color_config() < 0)
 765                 return -1;
 766
 767         if (!data->got_remote_heads)
 768                 get_refs_via_connect(transport, 1, NULL);
 769
 770         memset(&args, 0, sizeof(args));
 771         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 772         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 773         args.use_thin_pack = data->options.thin;
 774         args.verbose = (transport->verbose > 0);
 775         args.quiet = (transport->verbose < 0);
 776         args.progress = transport->progress;
 777         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 778         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 779         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 780         args.push_options = transport->push_options;
 781         args.url = transport->url;
 782
 783         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 784                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 785         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 786                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 787         else
 788                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 789
 790         switch (data->version) {
 791         case protocol_v2:
 792                 die(_("support for protocol v2 not implemented yet"));
 793                 break;
 794         case protocol_v1:
 795         case protocol_v0:
 796                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 797                                 &data->extra_have);
 798                 break;
 799         case protocol_unknown_version:
 800                 BUG("unknown protocol version");
 801         }
 802
 803         close(data->fd[1]);
 804         close(data->fd[0]);
 805         /*
 806          * Atomic push may abort the connection early and close the pipe,
 807          * which may cause an error for `finish_connect()`. Ignore this error
 808          * for atomic git-push.
 809          */
 810         if (ret || args.atomic)
 811                 finish_connect(data->conn);
 812         else
 813                 ret = finish_connect(data->conn);
 814         data->conn = NULL;
 815         data->got_remote_heads = 0;
 816
 817         return ret;
 818 }
 819
 820 static int connect_git(struct transport *transport, const char *name,
 821                        const char *executable, int fd[2])
 822 {
 823         struct git_transport_data *data = transport->data;
 824         data->conn = git_connect(data->fd, transport->url,
 825                                  executable, 0);
 826         fd[0] = data->fd[0];
 827         fd[1] = data->fd[1];
 828         return 0;
 829 }
 830
 831 static int disconnect_git(struct transport *transport)
 832 {
 833         struct git_transport_data *data = transport->data;
 834         if (data->conn) {
 835                 if (data->got_remote_heads && !transport->stateless_rpc)
 836                         packet_flush(data->fd[1]);
 837                 close(data->fd[0]);
 838                 close(data->fd[1]);
 839                 finish_connect(data->conn);
 840         }
 841
 842         free(data);
 843         return 0;
 844 }
 845
 846 static struct transport_vtable taken_over_vtable = {
 847         NULL,
 848         get_refs_via_connect,
 849         fetch_refs_via_pack,
 850         git_transport_push,
 851         NULL,
 852         disconnect_git
 853 };
 854
 855 void transport_take_over(struct transport *transport,
 856                          struct child_process *child)
 857 {
 858         struct git_transport_data *data;
 859
 860         if (!transport->smart_options)
 861                 BUG("taking over transport requires non-NULL "
 862                     "smart_options field.");
 863
 864         data = xcalloc(1, sizeof(*data));
 865         data->options = *transport->smart_options;
 866         data->conn = child;
 867         data->fd[0] = data->conn->out;
 868         data->fd[1] = data->conn->in;
 869         data->got_remote_heads = 0;
 870         transport->data = data;
 871
 872         transport->vtable = &taken_over_vtable;
 873         transport->smart_options = &(data->options);
 874
 875         transport->cannot_reuse = 1;
 876 }
 877
 878 static int is_file(const char *url)
 879 {
 880         struct stat buf;
 881         if (stat(url, &buf))
 882                 return 0;
 883         return S_ISREG(buf.st_mode);
 884 }
 885
 886 static int external_specification_len(const char *url)
 887 {
 888         return strchr(url, ':') - url;
 889 }
 890
 891 static const struct string_list *protocol_whitelist(void)
 892 {
 893         static int enabled = -1;
 894         static struct string_list allowed = STRING_LIST_INIT_DUP;
 895
 896         if (enabled < 0) {
 897                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 898                 if (v) {
 899                         string_list_split(&allowed, v, ':', -1);
 900                         string_list_sort(&allowed);
 901                         enabled = 1;
 902                 } else {
 903                         enabled = 0;
 904                 }
 905         }
 906
 907         return enabled ? &allowed : NULL;
 908 }
 909
 910 enum protocol_allow_config {
 911         PROTOCOL_ALLOW_NEVER = 0,
 912         PROTOCOL_ALLOW_USER_ONLY,
 913         PROTOCOL_ALLOW_ALWAYS
 914 };
 915
 916 static enum protocol_allow_config parse_protocol_config(const char *key,
 917                                                         const char *value)
 918 {
 919         if (!strcasecmp(value, "always"))
 920                 return PROTOCOL_ALLOW_ALWAYS;
 921         else if (!strcasecmp(value, "never"))
 922                 return PROTOCOL_ALLOW_NEVER;
 923         else if (!strcasecmp(value, "user"))
 924                 return PROTOCOL_ALLOW_USER_ONLY;
 925
 926         die(_("unknown value for config '%s': %s"), key, value);
 927 }
 928
 929 static enum protocol_allow_config get_protocol_config(const char *type)
 930 {
 931         char *key = xstrfmt("protocol.%s.allow", type);
 932         char *value;
 933
 934         /* first check the per-protocol config */
 935         if (!git_config_get_string(key, &value)) {
 936                 enum protocol_allow_config ret =
 937                         parse_protocol_config(key, value);
 938                 free(key);
 939                 free(value);
 940                 return ret;
 941         }
 942         free(key);
 943
 944         /* if defined, fallback to user-defined default for unknown protocols */
 945         if (!git_config_get_string("protocol.allow", &value)) {
 946                 enum protocol_allow_config ret =
 947                         parse_protocol_config("protocol.allow", value);
 948                 free(value);
 949                 return ret;
 950         }
 951
 952         /* fallback to built-in defaults */
 953         /* known safe */
 954         if (!strcmp(type, "http") ||
 955             !strcmp(type, "https") ||
 956             !strcmp(type, "git") ||
 957             !strcmp(type, "ssh") ||
 958             !strcmp(type, "file"))
 959                 return PROTOCOL_ALLOW_ALWAYS;
 960
 961         /* known scary; err on the side of caution */
 962         if (!strcmp(type, "ext"))
 963                 return PROTOCOL_ALLOW_NEVER;
 964
 965         /* unknown; by default let them be used only directly by the user */
 966         return PROTOCOL_ALLOW_USER_ONLY;
 967 }
 968
 969 int is_transport_allowed(const char *type, int from_user)
 970 {
 971         const struct string_list *whitelist = protocol_whitelist();
 972         if (whitelist)
 973                 return string_list_has_string(whitelist, type);
 974
 975         switch (get_protocol_config(type)) {
 976         case PROTOCOL_ALLOW_ALWAYS:
 977                 return 1;
 978         case PROTOCOL_ALLOW_NEVER:
 979                 return 0;
 980         case PROTOCOL_ALLOW_USER_ONLY:
 981                 if (from_user < 0)
 982                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 983                 return from_user;
 984         }
 985
 986         BUG("invalid protocol_allow_config type");
 987 }
 988
 989 void transport_check_allowed(const char *type)
 990 {
 991         if (!is_transport_allowed(type, -1))
 992                 die(_("transport '%s' not allowed"), type);
 993 }
 994
 995 static struct transport_vtable bundle_vtable = {
 996         NULL,
 997         get_refs_from_bundle,
 998         fetch_refs_from_bundle,
 999         NULL,
1000         NULL,
1001         close_bundle
1002 };
1003
1004 static struct transport_vtable builtin_smart_vtable = {
1005         NULL,
1006         get_refs_via_connect,
1007         fetch_refs_via_pack,
1008         git_transport_push,
1009         connect_git,
1010         disconnect_git
1011 };
1012
1013 struct transport *transport_get(struct remote *remote, const char *url)
1014 {
1015         const char *helper;
1016         struct transport *ret = xcalloc(1, sizeof(*ret));
1017
1018         ret->progress = isatty(2);
1019         string_list_init(&ret->pack_lockfiles, 1);
1020
1021         if (!remote)
1022                 BUG("No remote provided to transport_get()");
1023
1024         ret->got_remote_refs = 0;
1025         ret->remote = remote;
1026         helper = remote->foreign_vcs;
1027
1028         if (!url && remote->url)
1029                 url = remote->url[0];
1030         ret->url = url;
1031
1032         /* maybe it is a foreign URL? */
1033         if (url) {
1034                 const char *p = url;
1035
1036                 while (is_urlschemechar(p == url, *p))
1037                         p++;
1038                 if (starts_with(p, "::"))
1039                         helper = xstrndup(url, p - url);
1040         }
1041
1042         if (helper) {
1043                 transport_helper_init(ret, helper);
1044         } else if (starts_with(url, "rsync:")) {
1045                 die(_("git-over-rsync is no longer supported"));
1046         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1047                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1048                 transport_check_allowed("file");
1049                 ret->data = data;
1050                 ret->vtable = &bundle_vtable;
1051                 ret->smart_options = NULL;
1052         } else if (!is_url(url)
1053                 || starts_with(url, "file://")
1054                 || starts_with(url, "git://")
1055                 || starts_with(url, "ssh://")
1056                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1057                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1058                 ) {
1059                 /*
1060                  * These are builtin smart transports; "allowed" transports
1061                  * will be checked individually in git_connect.
1062                  */
1063                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1064                 ret->data = data;
1065                 ret->vtable = &builtin_smart_vtable;
1066                 ret->smart_options = &(data->options);
1067
1068                 data->conn = NULL;
1069                 data->got_remote_heads = 0;
1070         } else {
1071                 /* Unknown protocol in URL. Pass to external handler. */
1072                 int len = external_specification_len(url);
1073                 char *handler = xmemdupz(url, len);
1074                 transport_helper_init(ret, handler);
1075         }
1076
1077         if (ret->smart_options) {
1078                 ret->smart_options->thin = 1;
1079                 ret->smart_options->uploadpack = "git-upload-pack";
1080                 if (remote->uploadpack)
1081                         ret->smart_options->uploadpack = remote->uploadpack;
1082                 ret->smart_options->receivepack = "git-receive-pack";
1083                 if (remote->receivepack)
1084                         ret->smart_options->receivepack = remote->receivepack;
1085         }
1086
1087         ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1088
1089         return ret;
1090 }
1091
1092 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1093 {
1094         return transport->hash_algo;
1095 }
1096
1097 int transport_set_option(struct transport *transport,
1098                          const char *name, const char *value)
1099 {
1100         int git_reports = 1, protocol_reports = 1;
1101
1102         if (transport->smart_options)
1103                 git_reports = set_git_option(transport->smart_options,
1104                                              name, value);
1105
1106         if (transport->vtable->set_option)
1107                 protocol_reports = transport->vtable->set_option(transport,
1108                                                                  name, value);
1109
1110         /* If either report is 0, report 0 (success). */
1111         if (!git_reports || !protocol_reports)
1112                 return 0;
1113         /* If either reports -1 (invalid value), report -1. */
1114         if ((git_reports == -1) || (protocol_reports == -1))
1115                 return -1;
1116         /* Otherwise if both report unknown, report unknown. */
1117         return 1;
1118 }
1119
1120 void transport_set_verbosity(struct transport *transport, int verbosity,
1121         int force_progress)
1122 {
1123         if (verbosity >= 1)
1124                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1125         if (verbosity < 0)
1126                 transport->verbose = -1;
1127
1128         /**
1129          * Rules used to determine whether to report progress (processing aborts
1130          * when a rule is satisfied):
1131          *
1132          *   . Report progress, if force_progress is 1 (ie. --progress).
1133          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1134          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1135          *   . Report progress if isatty(2) is 1.
1136          **/
1137         if (force_progress >= 0)
1138                 transport->progress = !!force_progress;
1139         else
1140                 transport->progress = verbosity >= 0 && isatty(2);
1141 }
1142
1143 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1144 {
1145         int i;
1146
1147         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1148                         "not be found on any remote:\n"));
1149         for (i = 0; i < needs_pushing->nr; i++)
1150                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1151         fprintf(stderr, _("\nPlease try\n\n"
1152                           "     git push --recurse-submodules=on-demand\n\n"
1153                           "or cd to the path and use\n\n"
1154                           "     git push\n\n"
1155                           "to push them to a remote.\n\n"));
1156
1157         string_list_clear(needs_pushing, 0);
1158
1159         die(_("Aborting."));
1160 }
1161
1162 static int run_pre_push_hook(struct transport *transport,
1163                              struct ref *remote_refs)
1164 {
1165         int ret = 0, x;
1166         struct ref *r;
1167         struct child_process proc = CHILD_PROCESS_INIT;
1168         struct strbuf buf;
1169         const char *argv[4];
1170
1171         if (!(argv[0] = find_hook("pre-push")))
1172                 return 0;
1173
1174         argv[1] = transport->remote->name;
1175         argv[2] = transport->url;
1176         argv[3] = NULL;
1177
1178         proc.argv = argv;
1179         proc.in = -1;
1180         proc.trace2_hook_name = "pre-push";
1181
1182         if (start_command(&proc)) {
1183                 finish_command(&proc);
1184                 return -1;
1185         }
1186
1187         sigchain_push(SIGPIPE, SIG_IGN);
1188
1189         strbuf_init(&buf, 256);
1190
1191         for (r = remote_refs; r; r = r->next) {
1192                 if (!r->peer_ref) continue;
1193                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1194                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1195                 if (r->status == REF_STATUS_REJECT_REMOTE_UPDATED) continue;
1196                 if (r->status == REF_STATUS_UPTODATE) continue;
1197
1198                 strbuf_reset(&buf);
1199                 strbuf_addf( &buf, "%s %s %s %s\n",
1200                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1201                          r->name, oid_to_hex(&r->old_oid));
1202
1203                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1204                         /* We do not mind if a hook does not read all refs. */
1205                         if (errno != EPIPE)
1206                                 ret = -1;
1207                         break;
1208                 }
1209         }
1210
1211         strbuf_release(&buf);
1212
1213         x = close(proc.in);
1214         if (!ret)
1215                 ret = x;
1216
1217         sigchain_pop(SIGPIPE);
1218
1219         x = finish_command(&proc);
1220         if (!ret)
1221                 ret = x;
1222
1223         return ret;
1224 }
1225
1226 int transport_push(struct repository *r,
1227                    struct transport *transport,
1228                    struct refspec *rs, int flags,
1229                    unsigned int *reject_reasons)
1230 {
1231         *reject_reasons = 0;
1232
1233         if (transport_color_config() < 0)
1234                 return -1;
1235
1236         if (transport->vtable->push_refs) {
1237                 struct ref *remote_refs;
1238                 struct ref *local_refs = get_local_heads();
1239                 int match_flags = MATCH_REFS_NONE;
1240                 int verbose = (transport->verbose > 0);
1241                 int quiet = (transport->verbose < 0);
1242                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1243                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1244                 int push_ret, ret, err;
1245                 struct strvec ref_prefixes = STRVEC_INIT;
1246
1247                 if (check_push_refs(local_refs, rs) < 0)
1248                         return -1;
1249
1250                 refspec_ref_prefixes(rs, &ref_prefixes);
1251
1252                 trace2_region_enter("transport_push", "get_refs_list", r);
1253                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1254                                                                &ref_prefixes);
1255                 trace2_region_leave("transport_push", "get_refs_list", r);
1256
1257                 strvec_clear(&ref_prefixes);
1258
1259                 if (flags & TRANSPORT_PUSH_ALL)
1260                         match_flags |= MATCH_REFS_ALL;
1261                 if (flags & TRANSPORT_PUSH_MIRROR)
1262                         match_flags |= MATCH_REFS_MIRROR;
1263                 if (flags & TRANSPORT_PUSH_PRUNE)
1264                         match_flags |= MATCH_REFS_PRUNE;
1265                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1266                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1267
1268                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1269                         return -1;
1270
1271                 if (transport->smart_options &&
1272                     transport->smart_options->cas &&
1273                     !is_empty_cas(transport->smart_options->cas))
1274                         apply_push_cas(transport->smart_options->cas,
1275                                        transport->remote, remote_refs);
1276
1277                 set_ref_status_for_push(remote_refs,
1278                         flags & TRANSPORT_PUSH_MIRROR,
1279                         flags & TRANSPORT_PUSH_FORCE);
1280
1281                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1282                         if (run_pre_push_hook(transport, remote_refs))
1283                                 return -1;
1284
1285                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1286                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1287                     !is_bare_repository()) {
1288                         struct ref *ref = remote_refs;
1289                         struct oid_array commits = OID_ARRAY_INIT;
1290
1291                         trace2_region_enter("transport_push", "push_submodules", r);
1292                         for (; ref; ref = ref->next)
1293                                 if (!is_null_oid(&ref->new_oid))
1294                                         oid_array_append(&commits,
1295                                                           &ref->new_oid);
1296
1297                         if (!push_unpushed_submodules(r,
1298                                                       &commits,
1299                                                       transport->remote,
1300                                                       rs,
1301                                                       transport->push_options,
1302                                                       pretend)) {
1303                                 oid_array_clear(&commits);
1304                                 trace2_region_leave("transport_push", "push_submodules", r);
1305                                 die(_("failed to push all needed submodules"));
1306                         }
1307                         oid_array_clear(&commits);
1308                         trace2_region_leave("transport_push", "push_submodules", r);
1309                 }
1310
1311                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1312                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1313                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1314                       !pretend)) && !is_bare_repository()) {
1315                         struct ref *ref = remote_refs;
1316                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1317                         struct oid_array commits = OID_ARRAY_INIT;
1318
1319                         trace2_region_enter("transport_push", "check_submodules", r);
1320                         for (; ref; ref = ref->next)
1321                                 if (!is_null_oid(&ref->new_oid))
1322                                         oid_array_append(&commits,
1323                                                           &ref->new_oid);
1324
1325                         if (find_unpushed_submodules(r,
1326                                                      &commits,
1327                                                      transport->remote->name,
1328                                                      &needs_pushing)) {
1329                                 oid_array_clear(&commits);
1330                                 trace2_region_leave("transport_push", "check_submodules", r);
1331                                 die_with_unpushed_submodules(&needs_pushing);
1332                         }
1333                         string_list_clear(&needs_pushing, 0);
1334                         oid_array_clear(&commits);
1335                         trace2_region_leave("transport_push", "check_submodules", r);
1336                 }
1337
1338                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1339                         trace2_region_enter("transport_push", "push_refs", r);
1340                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1341                         trace2_region_leave("transport_push", "push_refs", r);
1342                 } else
1343                         push_ret = 0;
1344                 err = push_had_errors(remote_refs);
1345                 ret = push_ret | err;
1346
1347                 if (!quiet || err)
1348                         transport_print_push_status(transport->url, remote_refs,
1349                                         verbose | porcelain, porcelain,
1350                                         reject_reasons);
1351
1352                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1353                         set_upstreams(transport, remote_refs, pretend);
1354
1355                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1356                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1357                         struct ref *ref;
1358                         for (ref = remote_refs; ref; ref = ref->next)
1359                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1360                 }
1361
1362                 if (porcelain && !push_ret)
1363                         puts("Done");
1364                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1365                         fprintf(stderr, "Everything up-to-date\n");
1366
1367                 return ret;
1368         }
1369         return 1;
1370 }
1371
1372 const struct ref *transport_get_remote_refs(struct transport *transport,
1373                                             const struct strvec *ref_prefixes)
1374 {
1375         if (!transport->got_remote_refs) {
1376                 transport->remote_refs =
1377                         transport->vtable->get_refs_list(transport, 0,
1378                                                          ref_prefixes);
1379                 transport->got_remote_refs = 1;
1380         }
1381
1382         return transport->remote_refs;
1383 }
1384
1385 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1386 {
1387         int rc;
1388         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1389         struct ref **heads = NULL;
1390         struct ref *rm;
1391
1392         for (rm = refs; rm; rm = rm->next) {
1393                 nr_refs++;
1394                 if (rm->peer_ref &&
1395                     !is_null_oid(&rm->old_oid) &&
1396                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1397                         continue;
1398                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1399                 heads[nr_heads++] = rm;
1400         }
1401
1402         if (!nr_heads) {
1403                 /*
1404                  * When deepening of a shallow repository is requested,
1405                  * then local and remote refs are likely to still be equal.
1406                  * Just feed them all to the fetch method in that case.
1407                  * This condition shouldn't be met in a non-deepening fetch
1408                  * (see builtin/fetch.c:quickfetch()).
1409                  */
1410                 ALLOC_ARRAY(heads, nr_refs);
1411                 for (rm = refs; rm; rm = rm->next)
1412                         heads[nr_heads++] = rm;
1413         }
1414
1415         rc = transport->vtable->fetch(transport, nr_heads, heads);
1416
1417         free(heads);
1418         return rc;
1419 }
1420
1421 void transport_unlock_pack(struct transport *transport)
1422 {
1423         int i;
1424
1425         for (i = 0; i < transport->pack_lockfiles.nr; i++)
1426                 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1427         string_list_clear(&transport->pack_lockfiles, 0);
1428 }
1429
1430 int transport_connect(struct transport *transport, const char *name,
1431                       const char *exec, int fd[2])
1432 {
1433         if (transport->vtable->connect)
1434                 return transport->vtable->connect(transport, name, exec, fd);
1435         else
1436                 die(_("operation not supported by protocol"));
1437 }
1438
1439 int transport_disconnect(struct transport *transport)
1440 {
1441         int ret = 0;
1442         if (transport->vtable->disconnect)
1443                 ret = transport->vtable->disconnect(transport);
1444         free(transport);
1445         return ret;
1446 }
1447
1448 /*
1449  * Strip username (and password) from a URL and return
1450  * it in a newly allocated string.
1451  */
1452 char *transport_anonymize_url(const char *url)
1453 {
1454         char *scheme_prefix, *anon_part;
1455         size_t anon_len, prefix_len = 0;
1456
1457         anon_part = strchr(url, '@');
1458         if (url_is_local_not_ssh(url) || !anon_part)
1459                 goto literal_copy;
1460
1461         anon_len = strlen(++anon_part);
1462         scheme_prefix = strstr(url, "://");
1463         if (!scheme_prefix) {
1464                 if (!strchr(anon_part, ':'))
1465                         /* cannot be "me@there:/path/name" */
1466                         goto literal_copy;
1467         } else {
1468                 const char *cp;
1469                 /* make sure scheme is reasonable */
1470                 for (cp = url; cp < scheme_prefix; cp++) {
1471                         switch (*cp) {
1472                                 /* RFC 1738 2.1 */
1473                         case '+': case '.': case '-':
1474                                 break; /* ok */
1475                         default:
1476                                 if (isalnum(*cp))
1477                                         break;
1478                                 /* it isn't */
1479                                 goto literal_copy;
1480                         }
1481                 }
1482                 /* @ past the first slash does not count */
1483                 cp = strchr(scheme_prefix + 3, '/');
1484                 if (cp && cp < anon_part)
1485                         goto literal_copy;
1486                 prefix_len = scheme_prefix - url + 3;
1487         }
1488         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1489                        (int)anon_len, anon_part);
1490 literal_copy:
1491         return xstrdup(url);
1492 }