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                         int flag = transport->verbose < 0 ? 0 : BRANCH_CONFIG_VERBOSE;
 113                         install_branch_config(flag, localname + 11,
 114                                 transport->remote->name, remotename);
 115                 } else if (transport->verbose >= 0)
 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                                         struct transport_ls_refs_options *transport_options)
 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         } else if (!strcmp(name, TRANS_OPT_REJECT_SHALLOW)) {
 240                 opts->reject_shallow = !!value;
 241                 return 0;
 242         }
 243         return 1;
 244 }
 245
 246 static int connect_setup(struct transport *transport, int for_push)
 247 {
 248         struct git_transport_data *data = transport->data;
 249         int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 250
 251         if (data->conn)
 252                 return 0;
 253
 254         switch (transport->family) {
 255         case TRANSPORT_FAMILY_ALL: break;
 256         case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 257         case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 258         }
 259
 260         data->conn = git_connect(data->fd, transport->url,
 261                                  for_push ? data->options.receivepack :
 262                                  data->options.uploadpack,
 263                                  flags);
 264
 265         return 0;
 266 }
 267
 268 static void die_if_server_options(struct transport *transport)
 269 {
 270         if (!transport->server_options || !transport->server_options->nr)
 271                 return;
 272         advise(_("see protocol.version in 'git help config' for more details"));
 273         die(_("server options require protocol version 2 or later"));
 274 }
 275
 276 /*
 277  * Obtains the protocol version from the transport and writes it to
 278  * transport->data->version, first connecting if not already connected.
 279  *
 280  * If the protocol version is one that allows skipping the listing of remote
 281  * refs, and must_list_refs is 0, the listing of remote refs is skipped and
 282  * this function returns NULL. Otherwise, this function returns the list of
 283  * remote refs.
 284  */
 285 static struct ref *handshake(struct transport *transport, int for_push,
 286                              struct transport_ls_refs_options *options,
 287                              int must_list_refs)
 288 {
 289         struct git_transport_data *data = transport->data;
 290         struct ref *refs = NULL;
 291         struct packet_reader reader;
 292         int sid_len;
 293         const char *server_sid;
 294
 295         connect_setup(transport, for_push);
 296
 297         packet_reader_init(&reader, data->fd[0], NULL, 0,
 298                            PACKET_READ_CHOMP_NEWLINE |
 299                            PACKET_READ_GENTLE_ON_EOF |
 300                            PACKET_READ_DIE_ON_ERR_PACKET);
 301
 302         data->version = discover_version(&reader);
 303         switch (data->version) {
 304         case protocol_v2:
 305                 if (server_feature_v2("session-id", &server_sid))
 306                         trace2_data_string("transfer", NULL, "server-sid", server_sid);
 307                 if (must_list_refs)
 308                         get_remote_refs(data->fd[1], &reader, &refs, for_push,
 309                                         options,
 310                                         transport->server_options,
 311                                         transport->stateless_rpc);
 312                 break;
 313         case protocol_v1:
 314         case protocol_v0:
 315                 die_if_server_options(transport);
 316                 get_remote_heads(&reader, &refs,
 317                                  for_push ? REF_NORMAL : 0,
 318                                  &data->extra_have,
 319                                  &data->shallow);
 320                 server_sid = server_feature_value("session-id", &sid_len);
 321                 if (server_sid) {
 322                         char *sid = xstrndup(server_sid, sid_len);
 323                         trace2_data_string("transfer", NULL, "server-sid", sid);
 324                         free(sid);
 325                 }
 326                 break;
 327         case protocol_unknown_version:
 328                 BUG("unknown protocol version");
 329         }
 330         data->got_remote_heads = 1;
 331         transport->hash_algo = reader.hash_algo;
 332
 333         if (reader.line_peeked)
 334                 BUG("buffer must be empty at the end of handshake()");
 335
 336         return refs;
 337 }
 338
 339 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
 340                                         struct transport_ls_refs_options *options)
 341 {
 342         return handshake(transport, for_push, options, 1);
 343 }
 344
 345 static int fetch_refs_via_pack(struct transport *transport,
 346                                int nr_heads, struct ref **to_fetch)
 347 {
 348         int ret = 0;
 349         struct git_transport_data *data = transport->data;
 350         struct ref *refs = NULL;
 351         struct fetch_pack_args args;
 352         struct ref *refs_tmp = NULL;
 353
 354         memset(&args, 0, sizeof(args));
 355         args.uploadpack = data->options.uploadpack;
 356         args.keep_pack = data->options.keep;
 357         args.lock_pack = 1;
 358         args.use_thin_pack = data->options.thin;
 359         args.include_tag = data->options.followtags;
 360         args.verbose = (transport->verbose > 1);
 361         args.quiet = (transport->verbose < 0);
 362         args.no_progress = !transport->progress;
 363         args.depth = data->options.depth;
 364         args.deepen_since = data->options.deepen_since;
 365         args.deepen_not = data->options.deepen_not;
 366         args.deepen_relative = data->options.deepen_relative;
 367         args.check_self_contained_and_connected =
 368                 data->options.check_self_contained_and_connected;
 369         args.cloning = transport->cloning;
 370         args.update_shallow = data->options.update_shallow;
 371         args.from_promisor = data->options.from_promisor;
 372         args.filter_options = data->options.filter_options;
 373         args.stateless_rpc = transport->stateless_rpc;
 374         args.server_options = transport->server_options;
 375         args.negotiation_tips = data->options.negotiation_tips;
 376         args.reject_shallow_remote = transport->smart_options->reject_shallow;
 377
 378         if (!data->got_remote_heads) {
 379                 int i;
 380                 int must_list_refs = 0;
 381                 for (i = 0; i < nr_heads; i++) {
 382                         if (!to_fetch[i]->exact_oid) {
 383                                 must_list_refs = 1;
 384                                 break;
 385                         }
 386                 }
 387                 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
 388         }
 389
 390         if (data->version == protocol_unknown_version)
 391                 BUG("unknown protocol version");
 392         else if (data->version <= protocol_v1)
 393                 die_if_server_options(transport);
 394
 395         if (data->options.acked_commits) {
 396                 if (data->version < protocol_v2) {
 397                         warning(_("--negotiate-only requires protocol v2"));
 398                         ret = -1;
 399                 } else if (!server_supports_feature("fetch", "wait-for-done", 0)) {
 400                         warning(_("server does not support wait-for-done"));
 401                         ret = -1;
 402                 } else {
 403                         negotiate_using_fetch(data->options.negotiation_tips,
 404                                               transport->server_options,
 405                                               transport->stateless_rpc,
 406                                               data->fd,
 407                                               data->options.acked_commits);
 408                         ret = 0;
 409                 }
 410                 goto cleanup;
 411         }
 412
 413         refs = fetch_pack(&args, data->fd,
 414                           refs_tmp ? refs_tmp : transport->remote_refs,
 415                           to_fetch, nr_heads, &data->shallow,
 416                           &transport->pack_lockfiles, data->version);
 417
 418         data->got_remote_heads = 0;
 419         data->options.self_contained_and_connected =
 420                 args.self_contained_and_connected;
 421         data->options.connectivity_checked = args.connectivity_checked;
 422
 423         if (refs == NULL)
 424                 ret = -1;
 425         if (report_unmatched_refs(to_fetch, nr_heads))
 426                 ret = -1;
 427
 428 cleanup:
 429         close(data->fd[0]);
 430         close(data->fd[1]);
 431         if (finish_connect(data->conn))
 432                 ret = -1;
 433         data->conn = NULL;
 434
 435         free_refs(refs_tmp);
 436         free_refs(refs);
 437         return ret;
 438 }
 439
 440 static int push_had_errors(struct ref *ref)
 441 {
 442         for (; ref; ref = ref->next) {
 443                 switch (ref->status) {
 444                 case REF_STATUS_NONE:
 445                 case REF_STATUS_UPTODATE:
 446                 case REF_STATUS_OK:
 447                         break;
 448                 default:
 449                         return 1;
 450                 }
 451         }
 452         return 0;
 453 }
 454
 455 int transport_refs_pushed(struct ref *ref)
 456 {
 457         for (; ref; ref = ref->next) {
 458                 switch(ref->status) {
 459                 case REF_STATUS_NONE:
 460                 case REF_STATUS_UPTODATE:
 461                         break;
 462                 default:
 463                         return 1;
 464                 }
 465         }
 466         return 0;
 467 }
 468
 469 static void update_one_tracking_ref(struct remote *remote, char *refname,
 470                                     struct object_id *new_oid, int deletion,
 471                                     int verbose)
 472 {
 473         struct refspec_item rs;
 474
 475         memset(&rs, 0, sizeof(rs));
 476         rs.src = refname;
 477         rs.dst = NULL;
 478
 479         if (!remote_find_tracking(remote, &rs)) {
 480                 if (verbose)
 481                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 482                 if (deletion)
 483                         delete_ref(NULL, rs.dst, NULL, 0);
 484                 else
 485                         update_ref("update by push", rs.dst, new_oid,
 486                                    NULL, 0, 0);
 487                 free(rs.dst);
 488         }
 489 }
 490
 491 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 492 {
 493         char *refname;
 494         struct object_id *new_oid;
 495         struct ref_push_report *report;
 496
 497         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 498                 return;
 499
 500         report = ref->report;
 501         if (!report)
 502                 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
 503                                         ref->deletion, verbose);
 504         else
 505                 for (; report; report = report->next) {
 506                         refname = report->ref_name ? (char *)report->ref_name : ref->name;
 507                         new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
 508                         update_one_tracking_ref(remote, refname, new_oid,
 509                                                 is_null_oid(new_oid), verbose);
 510                 }
 511 }
 512
 513 static void print_ref_status(char flag, const char *summary,
 514                              struct ref *to, struct ref *from, const char *msg,
 515                              struct ref_push_report *report,
 516                              int porcelain, int summary_width)
 517 {
 518         const char *to_name;
 519
 520         if (report && report->ref_name)
 521                 to_name = report->ref_name;
 522         else
 523                 to_name = to->name;
 524
 525         if (porcelain) {
 526                 if (from)
 527                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 528                 else
 529                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 530                 if (msg)
 531                         fprintf(stdout, "%s (%s)\n", summary, msg);
 532                 else
 533                         fprintf(stdout, "%s\n", summary);
 534         } else {
 535                 const char *red = "", *reset = "";
 536                 if (push_had_errors(to)) {
 537                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 538                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 539                 }
 540                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 541                         summary, reset);
 542                 if (from)
 543                         fprintf(stderr, "%s -> %s",
 544                                 prettify_refname(from->name),
 545                                 prettify_refname(to_name));
 546                 else
 547                         fputs(prettify_refname(to_name), stderr);
 548                 if (msg) {
 549                         fputs(" (", stderr);
 550                         fputs(msg, stderr);
 551                         fputc(')', stderr);
 552                 }
 553                 fputc('\n', stderr);
 554         }
 555 }
 556
 557 static void print_ok_ref_status(struct ref *ref,
 558                                 struct ref_push_report *report,
 559                                 int porcelain, int summary_width)
 560 {
 561         struct object_id *old_oid;
 562         struct object_id *new_oid;
 563         const char *ref_name;
 564         int forced_update;
 565
 566         if (report && report->old_oid)
 567                 old_oid = report->old_oid;
 568         else
 569                 old_oid = &ref->old_oid;
 570         if (report && report->new_oid)
 571                 new_oid = report->new_oid;
 572         else
 573                 new_oid = &ref->new_oid;
 574         if (report && report->forced_update)
 575                 forced_update = report->forced_update;
 576         else
 577                 forced_update = ref->forced_update;
 578         if (report && report->ref_name)
 579                 ref_name = report->ref_name;
 580         else
 581                 ref_name = ref->name;
 582
 583         if (ref->deletion)
 584                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 585                                  report, porcelain, summary_width);
 586         else if (is_null_oid(old_oid))
 587                 print_ref_status('*',
 588                                  (starts_with(ref_name, "refs/tags/")
 589                                   ? "[new tag]"
 590                                   : (starts_with(ref_name, "refs/heads/")
 591                                      ? "[new branch]"
 592                                      : "[new reference]")),
 593                                  ref, ref->peer_ref, NULL,
 594                                  report, porcelain, summary_width);
 595         else {
 596                 struct strbuf quickref = STRBUF_INIT;
 597                 char type;
 598                 const char *msg;
 599
 600                 strbuf_add_unique_abbrev(&quickref, old_oid,
 601                                          DEFAULT_ABBREV);
 602                 if (forced_update) {
 603                         strbuf_addstr(&quickref, "...");
 604                         type = '+';
 605                         msg = "forced update";
 606                 } else {
 607                         strbuf_addstr(&quickref, "..");
 608                         type = ' ';
 609                         msg = NULL;
 610                 }
 611                 strbuf_add_unique_abbrev(&quickref, new_oid,
 612                                          DEFAULT_ABBREV);
 613
 614                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 615                                  report, porcelain, summary_width);
 616                 strbuf_release(&quickref);
 617         }
 618 }
 619
 620 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 621                                  struct ref_push_report *report,
 622                                  int porcelain, int summary_width)
 623 {
 624         if (!count) {
 625                 char *url = transport_anonymize_url(dest);
 626                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 627                 free(url);
 628         }
 629
 630         switch(ref->status) {
 631         case REF_STATUS_NONE:
 632                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 633                                  report, porcelain, summary_width);
 634                 break;
 635         case REF_STATUS_REJECT_NODELETE:
 636                 print_ref_status('!', "[rejected]", ref, NULL,
 637                                  "remote does not support deleting refs",
 638                                  report, porcelain, summary_width);
 639                 break;
 640         case REF_STATUS_UPTODATE:
 641                 print_ref_status('=', "[up to date]", ref,
 642                                  ref->peer_ref, NULL,
 643                                  report, porcelain, summary_width);
 644                 break;
 645         case REF_STATUS_REJECT_NONFASTFORWARD:
 646                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 647                                  "non-fast-forward",
 648                                  report, porcelain, summary_width);
 649                 break;
 650         case REF_STATUS_REJECT_ALREADY_EXISTS:
 651                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 652                                  "already exists",
 653                                  report, porcelain, summary_width);
 654                 break;
 655         case REF_STATUS_REJECT_FETCH_FIRST:
 656                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 657                                  "fetch first",
 658                                  report, porcelain, summary_width);
 659                 break;
 660         case REF_STATUS_REJECT_NEEDS_FORCE:
 661                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 662                                  "needs force",
 663                                  report, porcelain, summary_width);
 664                 break;
 665         case REF_STATUS_REJECT_STALE:
 666                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 667                                  "stale info",
 668                                  report, porcelain, summary_width);
 669                 break;
 670         case REF_STATUS_REJECT_REMOTE_UPDATED:
 671                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 672                                  "remote ref updated since checkout",
 673                                  report, porcelain, summary_width);
 674                 break;
 675         case REF_STATUS_REJECT_SHALLOW:
 676                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 677                                  "new shallow roots not allowed",
 678                                  report, porcelain, summary_width);
 679                 break;
 680         case REF_STATUS_REMOTE_REJECT:
 681                 print_ref_status('!', "[remote rejected]", ref,
 682                                  ref->deletion ? NULL : ref->peer_ref,
 683                                  ref->remote_status,
 684                                  report, porcelain, summary_width);
 685                 break;
 686         case REF_STATUS_EXPECTING_REPORT:
 687                 print_ref_status('!', "[remote failure]", ref,
 688                                  ref->deletion ? NULL : ref->peer_ref,
 689                                  "remote failed to report status",
 690                                  report, porcelain, summary_width);
 691                 break;
 692         case REF_STATUS_ATOMIC_PUSH_FAILED:
 693                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 694                                  "atomic push failed",
 695                                  report, porcelain, summary_width);
 696                 break;
 697         case REF_STATUS_OK:
 698                 print_ok_ref_status(ref, report, porcelain, summary_width);
 699                 break;
 700         }
 701
 702         return 1;
 703 }
 704
 705 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 706                                  int porcelain, int summary_width)
 707 {
 708         struct ref_push_report *report;
 709         int n = 0;
 710
 711         if (!ref->report)
 712                 return print_one_push_report(ref, dest, count,
 713                                              NULL, porcelain, summary_width);
 714
 715         for (report = ref->report; report; report = report->next)
 716                 print_one_push_report(ref, dest, count + n++,
 717                                       report, porcelain, summary_width);
 718         return n;
 719 }
 720
 721 static int measure_abbrev(const struct object_id *oid, int sofar)
 722 {
 723         char hex[GIT_MAX_HEXSZ + 1];
 724         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 725
 726         return (w < sofar) ? sofar : w;
 727 }
 728
 729 int transport_summary_width(const struct ref *refs)
 730 {
 731         int maxw = -1;
 732
 733         for (; refs; refs = refs->next) {
 734                 maxw = measure_abbrev(&refs->old_oid, maxw);
 735                 maxw = measure_abbrev(&refs->new_oid, maxw);
 736         }
 737         if (maxw < 0)
 738                 maxw = FALLBACK_DEFAULT_ABBREV;
 739         return (2 * maxw + 3);
 740 }
 741
 742 void transport_print_push_status(const char *dest, struct ref *refs,
 743                                   int verbose, int porcelain, unsigned int *reject_reasons)
 744 {
 745         struct ref *ref;
 746         int n = 0;
 747         char *head;
 748         int summary_width = transport_summary_width(refs);
 749
 750         if (transport_color_config() < 0)
 751                 warning(_("could not parse transport.color.* config"));
 752
 753         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 754
 755         if (verbose) {
 756                 for (ref = refs; ref; ref = ref->next)
 757                         if (ref->status == REF_STATUS_UPTODATE)
 758                                 n += print_one_push_status(ref, dest, n,
 759                                                            porcelain, summary_width);
 760         }
 761
 762         for (ref = refs; ref; ref = ref->next)
 763                 if (ref->status == REF_STATUS_OK)
 764                         n += print_one_push_status(ref, dest, n,
 765                                                    porcelain, summary_width);
 766
 767         *reject_reasons = 0;
 768         for (ref = refs; ref; ref = ref->next) {
 769                 if (ref->status != REF_STATUS_NONE &&
 770                     ref->status != REF_STATUS_UPTODATE &&
 771                     ref->status != REF_STATUS_OK)
 772                         n += print_one_push_status(ref, dest, n,
 773                                                    porcelain, summary_width);
 774                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 775                         if (head != NULL && !strcmp(head, ref->name))
 776                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 777                         else
 778                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 779                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 780                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 781                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 782                         *reject_reasons |= REJECT_FETCH_FIRST;
 783                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 784                         *reject_reasons |= REJECT_NEEDS_FORCE;
 785                 } else if (ref->status == REF_STATUS_REJECT_REMOTE_UPDATED) {
 786                         *reject_reasons |= REJECT_REF_NEEDS_UPDATE;
 787                 }
 788         }
 789         free(head);
 790 }
 791
 792 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 793 {
 794         struct git_transport_data *data = transport->data;
 795         struct send_pack_args args;
 796         int ret = 0;
 797
 798         if (transport_color_config() < 0)
 799                 return -1;
 800
 801         if (!data->got_remote_heads)
 802                 get_refs_via_connect(transport, 1, NULL);
 803
 804         memset(&args, 0, sizeof(args));
 805         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 806         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 807         args.use_thin_pack = data->options.thin;
 808         args.verbose = (transport->verbose > 0);
 809         args.quiet = (transport->verbose < 0);
 810         args.progress = transport->progress;
 811         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 812         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 813         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 814         args.push_options = transport->push_options;
 815         args.url = transport->url;
 816
 817         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 818                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 819         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 820                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 821         else
 822                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 823
 824         switch (data->version) {
 825         case protocol_v2:
 826                 die(_("support for protocol v2 not implemented yet"));
 827                 break;
 828         case protocol_v1:
 829         case protocol_v0:
 830                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 831                                 &data->extra_have);
 832                 break;
 833         case protocol_unknown_version:
 834                 BUG("unknown protocol version");
 835         }
 836
 837         close(data->fd[1]);
 838         close(data->fd[0]);
 839         /*
 840          * Atomic push may abort the connection early and close the pipe,
 841          * which may cause an error for `finish_connect()`. Ignore this error
 842          * for atomic git-push.
 843          */
 844         if (ret || args.atomic)
 845                 finish_connect(data->conn);
 846         else
 847                 ret = finish_connect(data->conn);
 848         data->conn = NULL;
 849         data->got_remote_heads = 0;
 850
 851         return ret;
 852 }
 853
 854 static int connect_git(struct transport *transport, const char *name,
 855                        const char *executable, int fd[2])
 856 {
 857         struct git_transport_data *data = transport->data;
 858         data->conn = git_connect(data->fd, transport->url,
 859                                  executable, 0);
 860         fd[0] = data->fd[0];
 861         fd[1] = data->fd[1];
 862         return 0;
 863 }
 864
 865 static int disconnect_git(struct transport *transport)
 866 {
 867         struct git_transport_data *data = transport->data;
 868         if (data->conn) {
 869                 if (data->got_remote_heads && !transport->stateless_rpc)
 870                         packet_flush(data->fd[1]);
 871                 close(data->fd[0]);
 872                 close(data->fd[1]);
 873                 finish_connect(data->conn);
 874         }
 875
 876         free(data);
 877         return 0;
 878 }
 879
 880 static struct transport_vtable taken_over_vtable = {
 881         NULL,
 882         get_refs_via_connect,
 883         fetch_refs_via_pack,
 884         git_transport_push,
 885         NULL,
 886         disconnect_git
 887 };
 888
 889 void transport_take_over(struct transport *transport,
 890                          struct child_process *child)
 891 {
 892         struct git_transport_data *data;
 893
 894         if (!transport->smart_options)
 895                 BUG("taking over transport requires non-NULL "
 896                     "smart_options field.");
 897
 898         CALLOC_ARRAY(data, 1);
 899         data->options = *transport->smart_options;
 900         data->conn = child;
 901         data->fd[0] = data->conn->out;
 902         data->fd[1] = data->conn->in;
 903         data->got_remote_heads = 0;
 904         transport->data = data;
 905
 906         transport->vtable = &taken_over_vtable;
 907         transport->smart_options = &(data->options);
 908
 909         transport->cannot_reuse = 1;
 910 }
 911
 912 static int is_file(const char *url)
 913 {
 914         struct stat buf;
 915         if (stat(url, &buf))
 916                 return 0;
 917         return S_ISREG(buf.st_mode);
 918 }
 919
 920 static int external_specification_len(const char *url)
 921 {
 922         return strchr(url, ':') - url;
 923 }
 924
 925 static const struct string_list *protocol_whitelist(void)
 926 {
 927         static int enabled = -1;
 928         static struct string_list allowed = STRING_LIST_INIT_DUP;
 929
 930         if (enabled < 0) {
 931                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 932                 if (v) {
 933                         string_list_split(&allowed, v, ':', -1);
 934                         string_list_sort(&allowed);
 935                         enabled = 1;
 936                 } else {
 937                         enabled = 0;
 938                 }
 939         }
 940
 941         return enabled ? &allowed : NULL;
 942 }
 943
 944 enum protocol_allow_config {
 945         PROTOCOL_ALLOW_NEVER = 0,
 946         PROTOCOL_ALLOW_USER_ONLY,
 947         PROTOCOL_ALLOW_ALWAYS
 948 };
 949
 950 static enum protocol_allow_config parse_protocol_config(const char *key,
 951                                                         const char *value)
 952 {
 953         if (!strcasecmp(value, "always"))
 954                 return PROTOCOL_ALLOW_ALWAYS;
 955         else if (!strcasecmp(value, "never"))
 956                 return PROTOCOL_ALLOW_NEVER;
 957         else if (!strcasecmp(value, "user"))
 958                 return PROTOCOL_ALLOW_USER_ONLY;
 959
 960         die(_("unknown value for config '%s': %s"), key, value);
 961 }
 962
 963 static enum protocol_allow_config get_protocol_config(const char *type)
 964 {
 965         char *key = xstrfmt("protocol.%s.allow", type);
 966         char *value;
 967
 968         /* first check the per-protocol config */
 969         if (!git_config_get_string(key, &value)) {
 970                 enum protocol_allow_config ret =
 971                         parse_protocol_config(key, value);
 972                 free(key);
 973                 free(value);
 974                 return ret;
 975         }
 976         free(key);
 977
 978         /* if defined, fallback to user-defined default for unknown protocols */
 979         if (!git_config_get_string("protocol.allow", &value)) {
 980                 enum protocol_allow_config ret =
 981                         parse_protocol_config("protocol.allow", value);
 982                 free(value);
 983                 return ret;
 984         }
 985
 986         /* fallback to built-in defaults */
 987         /* known safe */
 988         if (!strcmp(type, "http") ||
 989             !strcmp(type, "https") ||
 990             !strcmp(type, "git") ||
 991             !strcmp(type, "ssh"))
 992                 return PROTOCOL_ALLOW_ALWAYS;
 993
 994         /* known scary; err on the side of caution */
 995         if (!strcmp(type, "ext"))
 996                 return PROTOCOL_ALLOW_NEVER;
 997
 998         /* unknown; by default let them be used only directly by the user */
 999         return PROTOCOL_ALLOW_USER_ONLY;
1000 }
1001
1002 int is_transport_allowed(const char *type, int from_user)
1003 {
1004         const struct string_list *whitelist = protocol_whitelist();
1005         if (whitelist)
1006                 return string_list_has_string(whitelist, type);
1007
1008         switch (get_protocol_config(type)) {
1009         case PROTOCOL_ALLOW_ALWAYS:
1010                 return 1;
1011         case PROTOCOL_ALLOW_NEVER:
1012                 return 0;
1013         case PROTOCOL_ALLOW_USER_ONLY:
1014                 if (from_user < 0)
1015                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
1016                 return from_user;
1017         }
1018
1019         BUG("invalid protocol_allow_config type");
1020 }
1021
1022 void transport_check_allowed(const char *type)
1023 {
1024         if (!is_transport_allowed(type, -1))
1025                 die(_("transport '%s' not allowed"), type);
1026 }
1027
1028 static struct transport_vtable bundle_vtable = {
1029         NULL,
1030         get_refs_from_bundle,
1031         fetch_refs_from_bundle,
1032         NULL,
1033         NULL,
1034         close_bundle
1035 };
1036
1037 static struct transport_vtable builtin_smart_vtable = {
1038         NULL,
1039         get_refs_via_connect,
1040         fetch_refs_via_pack,
1041         git_transport_push,
1042         connect_git,
1043         disconnect_git
1044 };
1045
1046 struct transport *transport_get(struct remote *remote, const char *url)
1047 {
1048         const char *helper;
1049         struct transport *ret = xcalloc(1, sizeof(*ret));
1050
1051         ret->progress = isatty(2);
1052         string_list_init(&ret->pack_lockfiles, 1);
1053
1054         if (!remote)
1055                 BUG("No remote provided to transport_get()");
1056
1057         ret->got_remote_refs = 0;
1058         ret->remote = remote;
1059         helper = remote->foreign_vcs;
1060
1061         if (!url && remote->url)
1062                 url = remote->url[0];
1063         ret->url = url;
1064
1065         /* maybe it is a foreign URL? */
1066         if (url) {
1067                 const char *p = url;
1068
1069                 while (is_urlschemechar(p == url, *p))
1070                         p++;
1071                 if (starts_with(p, "::"))
1072                         helper = xstrndup(url, p - url);
1073         }
1074
1075         if (helper) {
1076                 transport_helper_init(ret, helper);
1077         } else if (starts_with(url, "rsync:")) {
1078                 die(_("git-over-rsync is no longer supported"));
1079         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1080                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1081                 transport_check_allowed("file");
1082                 ret->data = data;
1083                 ret->vtable = &bundle_vtable;
1084                 ret->smart_options = NULL;
1085         } else if (!is_url(url)
1086                 || starts_with(url, "file://")
1087                 || starts_with(url, "git://")
1088                 || starts_with(url, "ssh://")
1089                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1090                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1091                 ) {
1092                 /*
1093                  * These are builtin smart transports; "allowed" transports
1094                  * will be checked individually in git_connect.
1095                  */
1096                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1097                 ret->data = data;
1098                 ret->vtable = &builtin_smart_vtable;
1099                 ret->smart_options = &(data->options);
1100
1101                 data->conn = NULL;
1102                 data->got_remote_heads = 0;
1103         } else {
1104                 /* Unknown protocol in URL. Pass to external handler. */
1105                 int len = external_specification_len(url);
1106                 char *handler = xmemdupz(url, len);
1107                 transport_helper_init(ret, handler);
1108         }
1109
1110         if (ret->smart_options) {
1111                 ret->smart_options->thin = 1;
1112                 ret->smart_options->uploadpack = "git-upload-pack";
1113                 if (remote->uploadpack)
1114                         ret->smart_options->uploadpack = remote->uploadpack;
1115                 ret->smart_options->receivepack = "git-receive-pack";
1116                 if (remote->receivepack)
1117                         ret->smart_options->receivepack = remote->receivepack;
1118         }
1119
1120         ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1121
1122         return ret;
1123 }
1124
1125 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1126 {
1127         return transport->hash_algo;
1128 }
1129
1130 int transport_set_option(struct transport *transport,
1131                          const char *name, const char *value)
1132 {
1133         int git_reports = 1, protocol_reports = 1;
1134
1135         if (transport->smart_options)
1136                 git_reports = set_git_option(transport->smart_options,
1137                                              name, value);
1138
1139         if (transport->vtable->set_option)
1140                 protocol_reports = transport->vtable->set_option(transport,
1141                                                                  name, value);
1142
1143         /* If either report is 0, report 0 (success). */
1144         if (!git_reports || !protocol_reports)
1145                 return 0;
1146         /* If either reports -1 (invalid value), report -1. */
1147         if ((git_reports == -1) || (protocol_reports == -1))
1148                 return -1;
1149         /* Otherwise if both report unknown, report unknown. */
1150         return 1;
1151 }
1152
1153 void transport_set_verbosity(struct transport *transport, int verbosity,
1154         int force_progress)
1155 {
1156         if (verbosity >= 1)
1157                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1158         if (verbosity < 0)
1159                 transport->verbose = -1;
1160
1161         /**
1162          * Rules used to determine whether to report progress (processing aborts
1163          * when a rule is satisfied):
1164          *
1165          *   . Report progress, if force_progress is 1 (ie. --progress).
1166          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1167          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1168          *   . Report progress if isatty(2) is 1.
1169          **/
1170         if (force_progress >= 0)
1171                 transport->progress = !!force_progress;
1172         else
1173                 transport->progress = verbosity >= 0 && isatty(2);
1174 }
1175
1176 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1177 {
1178         int i;
1179
1180         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1181                         "not be found on any remote:\n"));
1182         for (i = 0; i < needs_pushing->nr; i++)
1183                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1184         fprintf(stderr, _("\nPlease try\n\n"
1185                           "     git push --recurse-submodules=on-demand\n\n"
1186                           "or cd to the path and use\n\n"
1187                           "     git push\n\n"
1188                           "to push them to a remote.\n\n"));
1189
1190         string_list_clear(needs_pushing, 0);
1191
1192         die(_("Aborting."));
1193 }
1194
1195 static int run_pre_push_hook(struct transport *transport,
1196                              struct ref *remote_refs)
1197 {
1198         int ret = 0, x;
1199         struct ref *r;
1200         struct child_process proc = CHILD_PROCESS_INIT;
1201         struct strbuf buf;
1202         const char *argv[4];
1203
1204         if (!(argv[0] = find_hook("pre-push")))
1205                 return 0;
1206
1207         argv[1] = transport->remote->name;
1208         argv[2] = transport->url;
1209         argv[3] = NULL;
1210
1211         proc.argv = argv;
1212         proc.in = -1;
1213         proc.trace2_hook_name = "pre-push";
1214
1215         if (start_command(&proc)) {
1216                 finish_command(&proc);
1217                 return -1;
1218         }
1219
1220         sigchain_push(SIGPIPE, SIG_IGN);
1221
1222         strbuf_init(&buf, 256);
1223
1224         for (r = remote_refs; r; r = r->next) {
1225                 if (!r->peer_ref) continue;
1226                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1227                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1228                 if (r->status == REF_STATUS_REJECT_REMOTE_UPDATED) continue;
1229                 if (r->status == REF_STATUS_UPTODATE) continue;
1230
1231                 strbuf_reset(&buf);
1232                 strbuf_addf( &buf, "%s %s %s %s\n",
1233                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1234                          r->name, oid_to_hex(&r->old_oid));
1235
1236                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1237                         /* We do not mind if a hook does not read all refs. */
1238                         if (errno != EPIPE)
1239                                 ret = -1;
1240                         break;
1241                 }
1242         }
1243
1244         strbuf_release(&buf);
1245
1246         x = close(proc.in);
1247         if (!ret)
1248                 ret = x;
1249
1250         sigchain_pop(SIGPIPE);
1251
1252         x = finish_command(&proc);
1253         if (!ret)
1254                 ret = x;
1255
1256         return ret;
1257 }
1258
1259 int transport_push(struct repository *r,
1260                    struct transport *transport,
1261                    struct refspec *rs, int flags,
1262                    unsigned int *reject_reasons)
1263 {
1264         *reject_reasons = 0;
1265
1266         if (transport_color_config() < 0)
1267                 return -1;
1268
1269         if (transport->vtable->push_refs) {
1270                 struct ref *remote_refs;
1271                 struct ref *local_refs = get_local_heads();
1272                 int match_flags = MATCH_REFS_NONE;
1273                 int verbose = (transport->verbose > 0);
1274                 int quiet = (transport->verbose < 0);
1275                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1276                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1277                 int push_ret, ret, err;
1278                 struct transport_ls_refs_options transport_options =
1279                         TRANSPORT_LS_REFS_OPTIONS_INIT;
1280
1281                 if (check_push_refs(local_refs, rs) < 0)
1282                         return -1;
1283
1284                 refspec_ref_prefixes(rs, &transport_options.ref_prefixes);
1285
1286                 trace2_region_enter("transport_push", "get_refs_list", r);
1287                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1288                                                                &transport_options);
1289                 trace2_region_leave("transport_push", "get_refs_list", r);
1290
1291                 strvec_clear(&transport_options.ref_prefixes);
1292
1293                 if (flags & TRANSPORT_PUSH_ALL)
1294                         match_flags |= MATCH_REFS_ALL;
1295                 if (flags & TRANSPORT_PUSH_MIRROR)
1296                         match_flags |= MATCH_REFS_MIRROR;
1297                 if (flags & TRANSPORT_PUSH_PRUNE)
1298                         match_flags |= MATCH_REFS_PRUNE;
1299                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1300                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1301
1302                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1303                         return -1;
1304
1305                 if (transport->smart_options &&
1306                     transport->smart_options->cas &&
1307                     !is_empty_cas(transport->smart_options->cas))
1308                         apply_push_cas(transport->smart_options->cas,
1309                                        transport->remote, remote_refs);
1310
1311                 set_ref_status_for_push(remote_refs,
1312                         flags & TRANSPORT_PUSH_MIRROR,
1313                         flags & TRANSPORT_PUSH_FORCE);
1314
1315                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1316                         if (run_pre_push_hook(transport, remote_refs))
1317                                 return -1;
1318
1319                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1320                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1321                     !is_bare_repository()) {
1322                         struct ref *ref = remote_refs;
1323                         struct oid_array commits = OID_ARRAY_INIT;
1324
1325                         trace2_region_enter("transport_push", "push_submodules", r);
1326                         for (; ref; ref = ref->next)
1327                                 if (!is_null_oid(&ref->new_oid))
1328                                         oid_array_append(&commits,
1329                                                           &ref->new_oid);
1330
1331                         if (!push_unpushed_submodules(r,
1332                                                       &commits,
1333                                                       transport->remote,
1334                                                       rs,
1335                                                       transport->push_options,
1336                                                       pretend)) {
1337                                 oid_array_clear(&commits);
1338                                 trace2_region_leave("transport_push", "push_submodules", r);
1339                                 die(_("failed to push all needed submodules"));
1340                         }
1341                         oid_array_clear(&commits);
1342                         trace2_region_leave("transport_push", "push_submodules", r);
1343                 }
1344
1345                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1346                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1347                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1348                       !pretend)) && !is_bare_repository()) {
1349                         struct ref *ref = remote_refs;
1350                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1351                         struct oid_array commits = OID_ARRAY_INIT;
1352
1353                         trace2_region_enter("transport_push", "check_submodules", r);
1354                         for (; ref; ref = ref->next)
1355                                 if (!is_null_oid(&ref->new_oid))
1356                                         oid_array_append(&commits,
1357                                                           &ref->new_oid);
1358
1359                         if (find_unpushed_submodules(r,
1360                                                      &commits,
1361                                                      transport->remote->name,
1362                                                      &needs_pushing)) {
1363                                 oid_array_clear(&commits);
1364                                 trace2_region_leave("transport_push", "check_submodules", r);
1365                                 die_with_unpushed_submodules(&needs_pushing);
1366                         }
1367                         string_list_clear(&needs_pushing, 0);
1368                         oid_array_clear(&commits);
1369                         trace2_region_leave("transport_push", "check_submodules", r);
1370                 }
1371
1372                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1373                         trace2_region_enter("transport_push", "push_refs", r);
1374                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1375                         trace2_region_leave("transport_push", "push_refs", r);
1376                 } else
1377                         push_ret = 0;
1378                 err = push_had_errors(remote_refs);
1379                 ret = push_ret | err;
1380
1381                 if (!quiet || err)
1382                         transport_print_push_status(transport->url, remote_refs,
1383                                         verbose | porcelain, porcelain,
1384                                         reject_reasons);
1385
1386                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1387                         set_upstreams(transport, remote_refs, pretend);
1388
1389                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1390                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1391                         struct ref *ref;
1392                         for (ref = remote_refs; ref; ref = ref->next)
1393                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1394                 }
1395
1396                 if (porcelain && !push_ret)
1397                         puts("Done");
1398                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1399                         fprintf(stderr, "Everything up-to-date\n");
1400
1401                 return ret;
1402         }
1403         return 1;
1404 }
1405
1406 const struct ref *transport_get_remote_refs(struct transport *transport,
1407                                             struct transport_ls_refs_options *transport_options)
1408 {
1409         if (!transport->got_remote_refs) {
1410                 transport->remote_refs =
1411                         transport->vtable->get_refs_list(transport, 0,
1412                                                          transport_options);
1413                 transport->got_remote_refs = 1;
1414         }
1415
1416         return transport->remote_refs;
1417 }
1418
1419 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1420 {
1421         int rc;
1422         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1423         struct ref **heads = NULL;
1424         struct ref *rm;
1425
1426         for (rm = refs; rm; rm = rm->next) {
1427                 nr_refs++;
1428                 if (rm->peer_ref &&
1429                     !is_null_oid(&rm->old_oid) &&
1430                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1431                         continue;
1432                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1433                 heads[nr_heads++] = rm;
1434         }
1435
1436         if (!nr_heads) {
1437                 /*
1438                  * When deepening of a shallow repository is requested,
1439                  * then local and remote refs are likely to still be equal.
1440                  * Just feed them all to the fetch method in that case.
1441                  * This condition shouldn't be met in a non-deepening fetch
1442                  * (see builtin/fetch.c:quickfetch()).
1443                  */
1444                 ALLOC_ARRAY(heads, nr_refs);
1445                 for (rm = refs; rm; rm = rm->next)
1446                         heads[nr_heads++] = rm;
1447         }
1448
1449         rc = transport->vtable->fetch(transport, nr_heads, heads);
1450
1451         free(heads);
1452         return rc;
1453 }
1454
1455 void transport_unlock_pack(struct transport *transport)
1456 {
1457         int i;
1458
1459         for (i = 0; i < transport->pack_lockfiles.nr; i++)
1460                 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1461         string_list_clear(&transport->pack_lockfiles, 0);
1462 }
1463
1464 int transport_connect(struct transport *transport, const char *name,
1465                       const char *exec, int fd[2])
1466 {
1467         if (transport->vtable->connect)
1468                 return transport->vtable->connect(transport, name, exec, fd);
1469         else
1470                 die(_("operation not supported by protocol"));
1471 }
1472
1473 int transport_disconnect(struct transport *transport)
1474 {
1475         int ret = 0;
1476         if (transport->vtable->disconnect)
1477                 ret = transport->vtable->disconnect(transport);
1478         if (transport->got_remote_refs)
1479                 free_refs((void *)transport->remote_refs);
1480         free(transport);
1481         return ret;
1482 }
1483
1484 /*
1485  * Strip username (and password) from a URL and return
1486  * it in a newly allocated string.
1487  */
1488 char *transport_anonymize_url(const char *url)
1489 {
1490         char *scheme_prefix, *anon_part;
1491         size_t anon_len, prefix_len = 0;
1492
1493         anon_part = strchr(url, '@');
1494         if (url_is_local_not_ssh(url) || !anon_part)
1495                 goto literal_copy;
1496
1497         anon_len = strlen(++anon_part);
1498         scheme_prefix = strstr(url, "://");
1499         if (!scheme_prefix) {
1500                 if (!strchr(anon_part, ':'))
1501                         /* cannot be "me@there:/path/name" */
1502                         goto literal_copy;
1503         } else {
1504                 const char *cp;
1505                 /* make sure scheme is reasonable */
1506                 for (cp = url; cp < scheme_prefix; cp++) {
1507                         switch (*cp) {
1508                                 /* RFC 1738 2.1 */
1509                         case '+': case '.': case '-':
1510                                 break; /* ok */
1511                         default:
1512                                 if (isalnum(*cp))
1513                                         break;
1514                                 /* it isn't */
1515                                 goto literal_copy;
1516                         }
1517                 }
1518                 /* @ past the first slash does not count */
1519                 cp = strchr(scheme_prefix + 3, '/');
1520                 if (cp && cp < anon_part)
1521                         goto literal_copy;
1522                 prefix_len = scheme_prefix - url + 3;
1523         }
1524         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1525                        (int)anon_len, anon_part);
1526 literal_copy:
1527         return xstrdup(url);
1528 }