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