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 static void update_one_tracking_ref(struct remote *remote, char *refname,
 441                                     struct object_id *new_oid, int deletion,
 442                                     int verbose)
 443 {
 444         struct refspec_item rs;
 445
 446         rs.src = refname;
 447         rs.dst = NULL;
 448
 449         if (!remote_find_tracking(remote, &rs)) {
 450                 if (verbose)
 451                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 452                 if (deletion)
 453                         delete_ref(NULL, rs.dst, NULL, 0);
 454                 else
 455                         update_ref("update by push", rs.dst, new_oid,
 456                                    NULL, 0, 0);
 457                 free(rs.dst);
 458         }
 459 }
 460
 461 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 462 {
 463         char *refname;
 464         struct object_id *new_oid;
 465         struct ref_push_report *report;
 466
 467         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 468                 return;
 469
 470         report = ref->report;
 471         if (!report)
 472                 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
 473                                         ref->deletion, verbose);
 474         else
 475                 for (; report; report = report->next) {
 476                         refname = report->ref_name ? (char *)report->ref_name : ref->name;
 477                         new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
 478                         update_one_tracking_ref(remote, refname, new_oid,
 479                                                 is_null_oid(new_oid), verbose);
 480                 }
 481 }
 482
 483 static void print_ref_status(char flag, const char *summary,
 484                              struct ref *to, struct ref *from, const char *msg,
 485                              struct ref_push_report *report,
 486                              int porcelain, int summary_width)
 487 {
 488         const char *to_name;
 489
 490         if (report && report->ref_name)
 491                 to_name = report->ref_name;
 492         else
 493                 to_name = to->name;
 494
 495         if (porcelain) {
 496                 if (from)
 497                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 498                 else
 499                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 500                 if (msg)
 501                         fprintf(stdout, "%s (%s)\n", summary, msg);
 502                 else
 503                         fprintf(stdout, "%s\n", summary);
 504         } else {
 505                 const char *red = "", *reset = "";
 506                 if (push_had_errors(to)) {
 507                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 508                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 509                 }
 510                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 511                         summary, reset);
 512                 if (from)
 513                         fprintf(stderr, "%s -> %s",
 514                                 prettify_refname(from->name),
 515                                 prettify_refname(to_name));
 516                 else
 517                         fputs(prettify_refname(to_name), stderr);
 518                 if (msg) {
 519                         fputs(" (", stderr);
 520                         fputs(msg, stderr);
 521                         fputc(')', stderr);
 522                 }
 523                 fputc('\n', stderr);
 524         }
 525 }
 526
 527 static void print_ok_ref_status(struct ref *ref,
 528                                 struct ref_push_report *report,
 529                                 int porcelain, int summary_width)
 530 {
 531         struct object_id *old_oid;
 532         struct object_id *new_oid;
 533         const char *ref_name;
 534         int forced_update;
 535
 536         if (report && report->old_oid)
 537                 old_oid = report->old_oid;
 538         else
 539                 old_oid = &ref->old_oid;
 540         if (report && report->new_oid)
 541                 new_oid = report->new_oid;
 542         else
 543                 new_oid = &ref->new_oid;
 544         if (report && report->forced_update)
 545                 forced_update = report->forced_update;
 546         else
 547                 forced_update = ref->forced_update;
 548         if (report && report->ref_name)
 549                 ref_name = report->ref_name;
 550         else
 551                 ref_name = ref->name;
 552
 553         if (ref->deletion)
 554                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 555                                  report, porcelain, summary_width);
 556         else if (is_null_oid(old_oid))
 557                 print_ref_status('*',
 558                                  (starts_with(ref_name, "refs/tags/")
 559                                   ? "[new tag]"
 560                                   : (starts_with(ref_name, "refs/heads/")
 561                                      ? "[new branch]"
 562                                      : "[new reference]")),
 563                                  ref, ref->peer_ref, NULL,
 564                                  report, porcelain, summary_width);
 565         else {
 566                 struct strbuf quickref = STRBUF_INIT;
 567                 char type;
 568                 const char *msg;
 569
 570                 strbuf_add_unique_abbrev(&quickref, old_oid,
 571                                          DEFAULT_ABBREV);
 572                 if (forced_update) {
 573                         strbuf_addstr(&quickref, "...");
 574                         type = '+';
 575                         msg = "forced update";
 576                 } else {
 577                         strbuf_addstr(&quickref, "..");
 578                         type = ' ';
 579                         msg = NULL;
 580                 }
 581                 strbuf_add_unique_abbrev(&quickref, new_oid,
 582                                          DEFAULT_ABBREV);
 583
 584                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 585                                  report, porcelain, summary_width);
 586                 strbuf_release(&quickref);
 587         }
 588 }
 589
 590 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 591                                  struct ref_push_report *report,
 592                                  int porcelain, int summary_width)
 593 {
 594         if (!count) {
 595                 char *url = transport_anonymize_url(dest);
 596                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 597                 free(url);
 598         }
 599
 600         switch(ref->status) {
 601         case REF_STATUS_NONE:
 602                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 603                                  report, porcelain, summary_width);
 604                 break;
 605         case REF_STATUS_REJECT_NODELETE:
 606                 print_ref_status('!', "[rejected]", ref, NULL,
 607                                  "remote does not support deleting refs",
 608                                  report, porcelain, summary_width);
 609                 break;
 610         case REF_STATUS_UPTODATE:
 611                 print_ref_status('=', "[up to date]", ref,
 612                                  ref->peer_ref, NULL,
 613                                  report, porcelain, summary_width);
 614                 break;
 615         case REF_STATUS_REJECT_NONFASTFORWARD:
 616                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 617                                  "non-fast-forward",
 618                                  report, porcelain, summary_width);
 619                 break;
 620         case REF_STATUS_REJECT_ALREADY_EXISTS:
 621                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 622                                  "already exists",
 623                                  report, porcelain, summary_width);
 624                 break;
 625         case REF_STATUS_REJECT_FETCH_FIRST:
 626                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 627                                  "fetch first",
 628                                  report, porcelain, summary_width);
 629                 break;
 630         case REF_STATUS_REJECT_NEEDS_FORCE:
 631                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 632                                  "needs force",
 633                                  report, porcelain, summary_width);
 634                 break;
 635         case REF_STATUS_REJECT_STALE:
 636                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 637                                  "stale info",
 638                                  report, porcelain, summary_width);
 639                 break;
 640         case REF_STATUS_REJECT_SHALLOW:
 641                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 642                                  "new shallow roots not allowed",
 643                                  report, porcelain, summary_width);
 644                 break;
 645         case REF_STATUS_REMOTE_REJECT:
 646                 print_ref_status('!', "[remote rejected]", ref,
 647                                  ref->deletion ? NULL : ref->peer_ref,
 648                                  ref->remote_status,
 649                                  report, porcelain, summary_width);
 650                 break;
 651         case REF_STATUS_EXPECTING_REPORT:
 652                 print_ref_status('!', "[remote failure]", ref,
 653                                  ref->deletion ? NULL : ref->peer_ref,
 654                                  "remote failed to report status",
 655                                  report, porcelain, summary_width);
 656                 break;
 657         case REF_STATUS_ATOMIC_PUSH_FAILED:
 658                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 659                                  "atomic push failed",
 660                                  report, porcelain, summary_width);
 661                 break;
 662         case REF_STATUS_OK:
 663                 print_ok_ref_status(ref, report, porcelain, summary_width);
 664                 break;
 665         }
 666
 667         return 1;
 668 }
 669
 670 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 671                                  int porcelain, int summary_width)
 672 {
 673         struct ref_push_report *report;
 674         int n = 0;
 675
 676         if (!ref->report)
 677                 return print_one_push_report(ref, dest, count,
 678                                              NULL, porcelain, summary_width);
 679
 680         for (report = ref->report; report; report = report->next)
 681                 print_one_push_report(ref, dest, count + n++,
 682                                       report, porcelain, summary_width);
 683         return n;
 684 }
 685
 686 static int measure_abbrev(const struct object_id *oid, int sofar)
 687 {
 688         char hex[GIT_MAX_HEXSZ + 1];
 689         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 690
 691         return (w < sofar) ? sofar : w;
 692 }
 693
 694 int transport_summary_width(const struct ref *refs)
 695 {
 696         int maxw = -1;
 697
 698         for (; refs; refs = refs->next) {
 699                 maxw = measure_abbrev(&refs->old_oid, maxw);
 700                 maxw = measure_abbrev(&refs->new_oid, maxw);
 701         }
 702         if (maxw < 0)
 703                 maxw = FALLBACK_DEFAULT_ABBREV;
 704         return (2 * maxw + 3);
 705 }
 706
 707 void transport_print_push_status(const char *dest, struct ref *refs,
 708                                   int verbose, int porcelain, unsigned int *reject_reasons)
 709 {
 710         struct ref *ref;
 711         int n = 0;
 712         char *head;
 713         int summary_width = transport_summary_width(refs);
 714
 715         if (transport_color_config() < 0)
 716                 warning(_("could not parse transport.color.* config"));
 717
 718         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 719
 720         if (verbose) {
 721                 for (ref = refs; ref; ref = ref->next)
 722                         if (ref->status == REF_STATUS_UPTODATE)
 723                                 n += print_one_push_status(ref, dest, n,
 724                                                            porcelain, summary_width);
 725         }
 726
 727         for (ref = refs; ref; ref = ref->next)
 728                 if (ref->status == REF_STATUS_OK)
 729                         n += print_one_push_status(ref, dest, n,
 730                                                    porcelain, summary_width);
 731
 732         *reject_reasons = 0;
 733         for (ref = refs; ref; ref = ref->next) {
 734                 if (ref->status != REF_STATUS_NONE &&
 735                     ref->status != REF_STATUS_UPTODATE &&
 736                     ref->status != REF_STATUS_OK)
 737                         n += print_one_push_status(ref, dest, n,
 738                                                    porcelain, summary_width);
 739                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 740                         if (head != NULL && !strcmp(head, ref->name))
 741                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 742                         else
 743                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 744                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 745                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 746                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 747                         *reject_reasons |= REJECT_FETCH_FIRST;
 748                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 749                         *reject_reasons |= REJECT_NEEDS_FORCE;
 750                 }
 751         }
 752         free(head);
 753 }
 754
 755 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 756 {
 757         struct git_transport_data *data = transport->data;
 758         struct send_pack_args args;
 759         int ret = 0;
 760
 761         if (transport_color_config() < 0)
 762                 return -1;
 763
 764         if (!data->got_remote_heads)
 765                 get_refs_via_connect(transport, 1, NULL);
 766
 767         memset(&args, 0, sizeof(args));
 768         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 769         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 770         args.use_thin_pack = data->options.thin;
 771         args.verbose = (transport->verbose > 0);
 772         args.quiet = (transport->verbose < 0);
 773         args.progress = transport->progress;
 774         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 775         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 776         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 777         args.push_options = transport->push_options;
 778         args.url = transport->url;
 779
 780         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 781                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 782         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 783                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 784         else
 785                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 786
 787         switch (data->version) {
 788         case protocol_v2:
 789                 die(_("support for protocol v2 not implemented yet"));
 790                 break;
 791         case protocol_v1:
 792         case protocol_v0:
 793                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 794                                 &data->extra_have);
 795                 break;
 796         case protocol_unknown_version:
 797                 BUG("unknown protocol version");
 798         }
 799
 800         close(data->fd[1]);
 801         close(data->fd[0]);
 802         /*
 803          * Atomic push may abort the connection early and close the pipe,
 804          * which may cause an error for `finish_connect()`. Ignore this error
 805          * for atomic git-push.
 806          */
 807         if (ret || args.atomic)
 808                 finish_connect(data->conn);
 809         else
 810                 ret = finish_connect(data->conn);
 811         data->conn = NULL;
 812         data->got_remote_heads = 0;
 813
 814         return ret;
 815 }
 816
 817 static int connect_git(struct transport *transport, const char *name,
 818                        const char *executable, int fd[2])
 819 {
 820         struct git_transport_data *data = transport->data;
 821         data->conn = git_connect(data->fd, transport->url,
 822                                  executable, 0);
 823         fd[0] = data->fd[0];
 824         fd[1] = data->fd[1];
 825         return 0;
 826 }
 827
 828 static int disconnect_git(struct transport *transport)
 829 {
 830         struct git_transport_data *data = transport->data;
 831         if (data->conn) {
 832                 if (data->got_remote_heads && !transport->stateless_rpc)
 833                         packet_flush(data->fd[1]);
 834                 close(data->fd[0]);
 835                 close(data->fd[1]);
 836                 finish_connect(data->conn);
 837         }
 838
 839         free(data);
 840         return 0;
 841 }
 842
 843 static struct transport_vtable taken_over_vtable = {
 844         NULL,
 845         get_refs_via_connect,
 846         fetch_refs_via_pack,
 847         git_transport_push,
 848         NULL,
 849         disconnect_git
 850 };
 851
 852 void transport_take_over(struct transport *transport,
 853                          struct child_process *child)
 854 {
 855         struct git_transport_data *data;
 856
 857         if (!transport->smart_options)
 858                 BUG("taking over transport requires non-NULL "
 859                     "smart_options field.");
 860
 861         data = xcalloc(1, sizeof(*data));
 862         data->options = *transport->smart_options;
 863         data->conn = child;
 864         data->fd[0] = data->conn->out;
 865         data->fd[1] = data->conn->in;
 866         data->got_remote_heads = 0;
 867         transport->data = data;
 868
 869         transport->vtable = &taken_over_vtable;
 870         transport->smart_options = &(data->options);
 871
 872         transport->cannot_reuse = 1;
 873 }
 874
 875 static int is_file(const char *url)
 876 {
 877         struct stat buf;
 878         if (stat(url, &buf))
 879                 return 0;
 880         return S_ISREG(buf.st_mode);
 881 }
 882
 883 static int external_specification_len(const char *url)
 884 {
 885         return strchr(url, ':') - url;
 886 }
 887
 888 static const struct string_list *protocol_whitelist(void)
 889 {
 890         static int enabled = -1;
 891         static struct string_list allowed = STRING_LIST_INIT_DUP;
 892
 893         if (enabled < 0) {
 894                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 895                 if (v) {
 896                         string_list_split(&allowed, v, ':', -1);
 897                         string_list_sort(&allowed);
 898                         enabled = 1;
 899                 } else {
 900                         enabled = 0;
 901                 }
 902         }
 903
 904         return enabled ? &allowed : NULL;
 905 }
 906
 907 enum protocol_allow_config {
 908         PROTOCOL_ALLOW_NEVER = 0,
 909         PROTOCOL_ALLOW_USER_ONLY,
 910         PROTOCOL_ALLOW_ALWAYS
 911 };
 912
 913 static enum protocol_allow_config parse_protocol_config(const char *key,
 914                                                         const char *value)
 915 {
 916         if (!strcasecmp(value, "always"))
 917                 return PROTOCOL_ALLOW_ALWAYS;
 918         else if (!strcasecmp(value, "never"))
 919                 return PROTOCOL_ALLOW_NEVER;
 920         else if (!strcasecmp(value, "user"))
 921                 return PROTOCOL_ALLOW_USER_ONLY;
 922
 923         die(_("unknown value for config '%s': %s"), key, value);
 924 }
 925
 926 static enum protocol_allow_config get_protocol_config(const char *type)
 927 {
 928         char *key = xstrfmt("protocol.%s.allow", type);
 929         char *value;
 930
 931         /* first check the per-protocol config */
 932         if (!git_config_get_string(key, &value)) {
 933                 enum protocol_allow_config ret =
 934                         parse_protocol_config(key, value);
 935                 free(key);
 936                 free(value);
 937                 return ret;
 938         }
 939         free(key);
 940
 941         /* if defined, fallback to user-defined default for unknown protocols */
 942         if (!git_config_get_string("protocol.allow", &value)) {
 943                 enum protocol_allow_config ret =
 944                         parse_protocol_config("protocol.allow", value);
 945                 free(value);
 946                 return ret;
 947         }
 948
 949         /* fallback to built-in defaults */
 950         /* known safe */
 951         if (!strcmp(type, "http") ||
 952             !strcmp(type, "https") ||
 953             !strcmp(type, "git") ||
 954             !strcmp(type, "ssh") ||
 955             !strcmp(type, "file"))
 956                 return PROTOCOL_ALLOW_ALWAYS;
 957
 958         /* known scary; err on the side of caution */
 959         if (!strcmp(type, "ext"))
 960                 return PROTOCOL_ALLOW_NEVER;
 961
 962         /* unknown; by default let them be used only directly by the user */
 963         return PROTOCOL_ALLOW_USER_ONLY;
 964 }
 965
 966 int is_transport_allowed(const char *type, int from_user)
 967 {
 968         const struct string_list *whitelist = protocol_whitelist();
 969         if (whitelist)
 970                 return string_list_has_string(whitelist, type);
 971
 972         switch (get_protocol_config(type)) {
 973         case PROTOCOL_ALLOW_ALWAYS:
 974                 return 1;
 975         case PROTOCOL_ALLOW_NEVER:
 976                 return 0;
 977         case PROTOCOL_ALLOW_USER_ONLY:
 978                 if (from_user < 0)
 979                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 980                 return from_user;
 981         }
 982
 983         BUG("invalid protocol_allow_config type");
 984 }
 985
 986 void transport_check_allowed(const char *type)
 987 {
 988         if (!is_transport_allowed(type, -1))
 989                 die(_("transport '%s' not allowed"), type);
 990 }
 991
 992 static struct transport_vtable bundle_vtable = {
 993         NULL,
 994         get_refs_from_bundle,
 995         fetch_refs_from_bundle,
 996         NULL,
 997         NULL,
 998         close_bundle
 999 };
1000
1001 static struct transport_vtable builtin_smart_vtable = {
1002         NULL,
1003         get_refs_via_connect,
1004         fetch_refs_via_pack,
1005         git_transport_push,
1006         connect_git,
1007         disconnect_git
1008 };
1009
1010 struct transport *transport_get(struct remote *remote, const char *url)
1011 {
1012         const char *helper;
1013         struct transport *ret = xcalloc(1, sizeof(*ret));
1014
1015         ret->progress = isatty(2);
1016
1017         if (!remote)
1018                 BUG("No remote provided to transport_get()");
1019
1020         ret->got_remote_refs = 0;
1021         ret->remote = remote;
1022         helper = remote->foreign_vcs;
1023
1024         if (!url && remote->url)
1025                 url = remote->url[0];
1026         ret->url = url;
1027
1028         /* maybe it is a foreign URL? */
1029         if (url) {
1030                 const char *p = url;
1031
1032                 while (is_urlschemechar(p == url, *p))
1033                         p++;
1034                 if (starts_with(p, "::"))
1035                         helper = xstrndup(url, p - url);
1036         }
1037
1038         if (helper) {
1039                 transport_helper_init(ret, helper);
1040         } else if (starts_with(url, "rsync:")) {
1041                 die(_("git-over-rsync is no longer supported"));
1042         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1043                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1044                 transport_check_allowed("file");
1045                 ret->data = data;
1046                 ret->vtable = &bundle_vtable;
1047                 ret->smart_options = NULL;
1048         } else if (!is_url(url)
1049                 || starts_with(url, "file://")
1050                 || starts_with(url, "git://")
1051                 || starts_with(url, "ssh://")
1052                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1053                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1054                 ) {
1055                 /*
1056                  * These are builtin smart transports; "allowed" transports
1057                  * will be checked individually in git_connect.
1058                  */
1059                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1060                 ret->data = data;
1061                 ret->vtable = &builtin_smart_vtable;
1062                 ret->smart_options = &(data->options);
1063
1064                 data->conn = NULL;
1065                 data->got_remote_heads = 0;
1066         } else {
1067                 /* Unknown protocol in URL. Pass to external handler. */
1068                 int len = external_specification_len(url);
1069                 char *handler = xmemdupz(url, len);
1070                 transport_helper_init(ret, handler);
1071         }
1072
1073         if (ret->smart_options) {
1074                 ret->smart_options->thin = 1;
1075                 ret->smart_options->uploadpack = "git-upload-pack";
1076                 if (remote->uploadpack)
1077                         ret->smart_options->uploadpack = remote->uploadpack;
1078                 ret->smart_options->receivepack = "git-receive-pack";
1079                 if (remote->receivepack)
1080                         ret->smart_options->receivepack = remote->receivepack;
1081         }
1082
1083         return ret;
1084 }
1085
1086 int transport_set_option(struct transport *transport,
1087                          const char *name, const char *value)
1088 {
1089         int git_reports = 1, protocol_reports = 1;
1090
1091         if (transport->smart_options)
1092                 git_reports = set_git_option(transport->smart_options,
1093                                              name, value);
1094
1095         if (transport->vtable->set_option)
1096                 protocol_reports = transport->vtable->set_option(transport,
1097                                                                  name, value);
1098
1099         /* If either report is 0, report 0 (success). */
1100         if (!git_reports || !protocol_reports)
1101                 return 0;
1102         /* If either reports -1 (invalid value), report -1. */
1103         if ((git_reports == -1) || (protocol_reports == -1))
1104                 return -1;
1105         /* Otherwise if both report unknown, report unknown. */
1106         return 1;
1107 }
1108
1109 void transport_set_verbosity(struct transport *transport, int verbosity,
1110         int force_progress)
1111 {
1112         if (verbosity >= 1)
1113                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1114         if (verbosity < 0)
1115                 transport->verbose = -1;
1116
1117         /**
1118          * Rules used to determine whether to report progress (processing aborts
1119          * when a rule is satisfied):
1120          *
1121          *   . Report progress, if force_progress is 1 (ie. --progress).
1122          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1123          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1124          *   . Report progress if isatty(2) is 1.
1125          **/
1126         if (force_progress >= 0)
1127                 transport->progress = !!force_progress;
1128         else
1129                 transport->progress = verbosity >= 0 && isatty(2);
1130 }
1131
1132 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1133 {
1134         int i;
1135
1136         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1137                         "not be found on any remote:\n"));
1138         for (i = 0; i < needs_pushing->nr; i++)
1139                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1140         fprintf(stderr, _("\nPlease try\n\n"
1141                           "     git push --recurse-submodules=on-demand\n\n"
1142                           "or cd to the path and use\n\n"
1143                           "     git push\n\n"
1144                           "to push them to a remote.\n\n"));
1145
1146         string_list_clear(needs_pushing, 0);
1147
1148         die(_("Aborting."));
1149 }
1150
1151 static int run_pre_push_hook(struct transport *transport,
1152                              struct ref *remote_refs)
1153 {
1154         int ret = 0, x;
1155         struct ref *r;
1156         struct child_process proc = CHILD_PROCESS_INIT;
1157         struct strbuf buf;
1158         const char *argv[4];
1159
1160         if (!(argv[0] = find_hook("pre-push")))
1161                 return 0;
1162
1163         argv[1] = transport->remote->name;
1164         argv[2] = transport->url;
1165         argv[3] = NULL;
1166
1167         proc.argv = argv;
1168         proc.in = -1;
1169         proc.trace2_hook_name = "pre-push";
1170
1171         if (start_command(&proc)) {
1172                 finish_command(&proc);
1173                 return -1;
1174         }
1175
1176         sigchain_push(SIGPIPE, SIG_IGN);
1177
1178         strbuf_init(&buf, 256);
1179
1180         for (r = remote_refs; r; r = r->next) {
1181                 if (!r->peer_ref) continue;
1182                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1183                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1184                 if (r->status == REF_STATUS_UPTODATE) continue;
1185
1186                 strbuf_reset(&buf);
1187                 strbuf_addf( &buf, "%s %s %s %s\n",
1188                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1189                          r->name, oid_to_hex(&r->old_oid));
1190
1191                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1192                         /* We do not mind if a hook does not read all refs. */
1193                         if (errno != EPIPE)
1194                                 ret = -1;
1195                         break;
1196                 }
1197         }
1198
1199         strbuf_release(&buf);
1200
1201         x = close(proc.in);
1202         if (!ret)
1203                 ret = x;
1204
1205         sigchain_pop(SIGPIPE);
1206
1207         x = finish_command(&proc);
1208         if (!ret)
1209                 ret = x;
1210
1211         return ret;
1212 }
1213
1214 int transport_push(struct repository *r,
1215                    struct transport *transport,
1216                    struct refspec *rs, int flags,
1217                    unsigned int *reject_reasons)
1218 {
1219         *reject_reasons = 0;
1220
1221         if (transport_color_config() < 0)
1222                 return -1;
1223
1224         if (transport->vtable->push_refs) {
1225                 struct ref *remote_refs;
1226                 struct ref *local_refs = get_local_heads();
1227                 int match_flags = MATCH_REFS_NONE;
1228                 int verbose = (transport->verbose > 0);
1229                 int quiet = (transport->verbose < 0);
1230                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1231                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1232                 int push_ret, ret, err;
1233                 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1234
1235                 if (check_push_refs(local_refs, rs) < 0)
1236                         return -1;
1237
1238                 refspec_ref_prefixes(rs, &ref_prefixes);
1239
1240                 trace2_region_enter("transport_push", "get_refs_list", r);
1241                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1242                                                                &ref_prefixes);
1243                 trace2_region_leave("transport_push", "get_refs_list", r);
1244
1245                 argv_array_clear(&ref_prefixes);
1246
1247                 if (flags & TRANSPORT_PUSH_ALL)
1248                         match_flags |= MATCH_REFS_ALL;
1249                 if (flags & TRANSPORT_PUSH_MIRROR)
1250                         match_flags |= MATCH_REFS_MIRROR;
1251                 if (flags & TRANSPORT_PUSH_PRUNE)
1252                         match_flags |= MATCH_REFS_PRUNE;
1253                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1254                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1255
1256                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1257                         return -1;
1258
1259                 if (transport->smart_options &&
1260                     transport->smart_options->cas &&
1261                     !is_empty_cas(transport->smart_options->cas))
1262                         apply_push_cas(transport->smart_options->cas,
1263                                        transport->remote, remote_refs);
1264
1265                 set_ref_status_for_push(remote_refs,
1266                         flags & TRANSPORT_PUSH_MIRROR,
1267                         flags & TRANSPORT_PUSH_FORCE);
1268
1269                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1270                         if (run_pre_push_hook(transport, remote_refs))
1271                                 return -1;
1272
1273                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1274                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1275                     !is_bare_repository()) {
1276                         struct ref *ref = remote_refs;
1277                         struct oid_array commits = OID_ARRAY_INIT;
1278
1279                         trace2_region_enter("transport_push", "push_submodules", r);
1280                         for (; ref; ref = ref->next)
1281                                 if (!is_null_oid(&ref->new_oid))
1282                                         oid_array_append(&commits,
1283                                                           &ref->new_oid);
1284
1285                         if (!push_unpushed_submodules(r,
1286                                                       &commits,
1287                                                       transport->remote,
1288                                                       rs,
1289                                                       transport->push_options,
1290                                                       pretend)) {
1291                                 oid_array_clear(&commits);
1292                                 trace2_region_leave("transport_push", "push_submodules", r);
1293                                 die(_("failed to push all needed submodules"));
1294                         }
1295                         oid_array_clear(&commits);
1296                         trace2_region_leave("transport_push", "push_submodules", r);
1297                 }
1298
1299                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1300                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1301                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1302                       !pretend)) && !is_bare_repository()) {
1303                         struct ref *ref = remote_refs;
1304                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1305                         struct oid_array commits = OID_ARRAY_INIT;
1306
1307                         trace2_region_enter("transport_push", "check_submodules", r);
1308                         for (; ref; ref = ref->next)
1309                                 if (!is_null_oid(&ref->new_oid))
1310                                         oid_array_append(&commits,
1311                                                           &ref->new_oid);
1312
1313                         if (find_unpushed_submodules(r,
1314                                                      &commits,
1315                                                      transport->remote->name,
1316                                                      &needs_pushing)) {
1317                                 oid_array_clear(&commits);
1318                                 trace2_region_leave("transport_push", "check_submodules", r);
1319                                 die_with_unpushed_submodules(&needs_pushing);
1320                         }
1321                         string_list_clear(&needs_pushing, 0);
1322                         oid_array_clear(&commits);
1323                         trace2_region_leave("transport_push", "check_submodules", r);
1324                 }
1325
1326                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1327                         trace2_region_enter("transport_push", "push_refs", r);
1328                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1329                         trace2_region_leave("transport_push", "push_refs", r);
1330                 } else
1331                         push_ret = 0;
1332                 err = push_had_errors(remote_refs);
1333                 ret = push_ret | err;
1334
1335                 if (!quiet || err)
1336                         transport_print_push_status(transport->url, remote_refs,
1337                                         verbose | porcelain, porcelain,
1338                                         reject_reasons);
1339
1340                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1341                         set_upstreams(transport, remote_refs, pretend);
1342
1343                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1344                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1345                         struct ref *ref;
1346                         for (ref = remote_refs; ref; ref = ref->next)
1347                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1348                 }
1349
1350                 if (porcelain && !push_ret)
1351                         puts("Done");
1352                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1353                         fprintf(stderr, "Everything up-to-date\n");
1354
1355                 return ret;
1356         }
1357         return 1;
1358 }
1359
1360 const struct ref *transport_get_remote_refs(struct transport *transport,
1361                                             const struct argv_array *ref_prefixes)
1362 {
1363         if (!transport->got_remote_refs) {
1364                 transport->remote_refs =
1365                         transport->vtable->get_refs_list(transport, 0,
1366                                                          ref_prefixes);
1367                 transport->got_remote_refs = 1;
1368         }
1369
1370         return transport->remote_refs;
1371 }
1372
1373 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1374 {
1375         int rc;
1376         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1377         struct ref **heads = NULL;
1378         struct ref *rm;
1379
1380         for (rm = refs; rm; rm = rm->next) {
1381                 nr_refs++;
1382                 if (rm->peer_ref &&
1383                     !is_null_oid(&rm->old_oid) &&
1384                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1385                         continue;
1386                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1387                 heads[nr_heads++] = rm;
1388         }
1389
1390         if (!nr_heads) {
1391                 /*
1392                  * When deepening of a shallow repository is requested,
1393                  * then local and remote refs are likely to still be equal.
1394                  * Just feed them all to the fetch method in that case.
1395                  * This condition shouldn't be met in a non-deepening fetch
1396                  * (see builtin/fetch.c:quickfetch()).
1397                  */
1398                 ALLOC_ARRAY(heads, nr_refs);
1399                 for (rm = refs; rm; rm = rm->next)
1400                         heads[nr_heads++] = rm;
1401         }
1402
1403         rc = transport->vtable->fetch(transport, nr_heads, heads);
1404
1405         free(heads);
1406         return rc;
1407 }
1408
1409 void transport_unlock_pack(struct transport *transport)
1410 {
1411         if (transport->pack_lockfile) {
1412                 unlink_or_warn(transport->pack_lockfile);
1413                 FREE_AND_NULL(transport->pack_lockfile);
1414         }
1415 }
1416
1417 int transport_connect(struct transport *transport, const char *name,
1418                       const char *exec, int fd[2])
1419 {
1420         if (transport->vtable->connect)
1421                 return transport->vtable->connect(transport, name, exec, fd);
1422         else
1423                 die(_("operation not supported by protocol"));
1424 }
1425
1426 int transport_disconnect(struct transport *transport)
1427 {
1428         int ret = 0;
1429         if (transport->vtable->disconnect)
1430                 ret = transport->vtable->disconnect(transport);
1431         free(transport);
1432         return ret;
1433 }
1434
1435 /*
1436  * Strip username (and password) from a URL and return
1437  * it in a newly allocated string.
1438  */
1439 char *transport_anonymize_url(const char *url)
1440 {
1441         char *scheme_prefix, *anon_part;
1442         size_t anon_len, prefix_len = 0;
1443
1444         anon_part = strchr(url, '@');
1445         if (url_is_local_not_ssh(url) || !anon_part)
1446                 goto literal_copy;
1447
1448         anon_len = strlen(++anon_part);
1449         scheme_prefix = strstr(url, "://");
1450         if (!scheme_prefix) {
1451                 if (!strchr(anon_part, ':'))
1452                         /* cannot be "me@there:/path/name" */
1453                         goto literal_copy;
1454         } else {
1455                 const char *cp;
1456                 /* make sure scheme is reasonable */
1457                 for (cp = url; cp < scheme_prefix; cp++) {
1458                         switch (*cp) {
1459                                 /* RFC 1738 2.1 */
1460                         case '+': case '.': case '-':
1461                                 break; /* ok */
1462                         default:
1463                                 if (isalnum(*cp))
1464                                         break;
1465                                 /* it isn't */
1466                                 goto literal_copy;
1467                         }
1468                 }
1469                 /* @ past the first slash does not count */
1470                 cp = strchr(scheme_prefix + 3, '/');
1471                 if (cp && cp < anon_part)
1472                         goto literal_copy;
1473                 prefix_len = scheme_prefix - url + 3;
1474         }
1475         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1476                        (int)anon_len, anon_part);
1477 literal_copy:
1478         return xstrdup(url);
1479 }