transport.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "transport.h"
   4 #include "run-command.h"
   5 #include "pkt-line.h"
   6 #include "fetch-pack.h"
   7 #include "remote.h"
   8 #include "connect.h"
   9 #include "send-pack.h"
  10 #include "walker.h"
  11 #include "bundle.h"
  12 #include "dir.h"
  13 #include "refs.h"
  14 #include "refspec.h"
  15 #include "branch.h"
  16 #include "url.h"
  17 #include "submodule.h"
  18 #include "string-list.h"
  19 #include "oid-array.h"
  20 #include "sigchain.h"
  21 #include "transport-internal.h"
  22 #include "protocol.h"
  23 #include "object-store.h"
  24 #include "color.h"
  25
  26 static int transport_use_color = -1;
  27 static char transport_colors[][COLOR_MAXLEN] = {
  28         GIT_COLOR_RESET,
  29         GIT_COLOR_RED           /* REJECTED */
  30 };
  31
  32 enum color_transport {
  33         TRANSPORT_COLOR_RESET = 0,
  34         TRANSPORT_COLOR_REJECTED = 1
  35 };
  36
  37 static int transport_color_config(void)
  38 {
  39         const char *keys[] = {
  40                 "color.transport.reset",
  41                 "color.transport.rejected"
  42         }, *key = "color.transport";
  43         char *value;
  44         int i;
  45         static int initialized;
  46
  47         if (initialized)
  48                 return 0;
  49         initialized = 1;
  50
  51         if (!git_config_get_string(key, &value))
  52                 transport_use_color = git_config_colorbool(key, value);
  53
  54         if (!want_color_stderr(transport_use_color))
  55                 return 0;
  56
  57         for (i = 0; i < ARRAY_SIZE(keys); i++)
  58                 if (!git_config_get_string(keys[i], &value)) {
  59                         if (!value)
  60                                 return config_error_nonbool(keys[i]);
  61                         if (color_parse(value, transport_colors[i]) < 0)
  62                                 return -1;
  63                 }
  64
  65         return 0;
  66 }
  67
  68 static const char *transport_get_color(enum color_transport ix)
  69 {
  70         if (want_color_stderr(transport_use_color))
  71                 return transport_colors[ix];
  72         return "";
  73 }
  74
  75 static void set_upstreams(struct transport *transport, struct ref *refs,
  76         int pretend)
  77 {
  78         struct ref *ref;
  79         for (ref = refs; ref; ref = ref->next) {
  80                 const char *localname;
  81                 const char *tmp;
  82                 const char *remotename;
  83                 int flag = 0;
  84                 /*
  85                  * Check suitability for tracking. Must be successful /
  86                  * already up-to-date ref create/modify (not delete).
  87                  */
  88                 if (ref->status != REF_STATUS_OK &&
  89                         ref->status != REF_STATUS_UPTODATE)
  90                         continue;
  91                 if (!ref->peer_ref)
  92                         continue;
  93                 if (is_null_oid(&ref->new_oid))
  94                         continue;
  95
  96                 /* Follow symbolic refs (mainly for HEAD). */
  97                 localname = ref->peer_ref->name;
  98                 remotename = ref->name;
  99                 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
 100                                          NULL, &flag);
 101                 if (tmp && flag & REF_ISSYMREF &&
 102                         starts_with(tmp, "refs/heads/"))
 103                         localname = tmp;
 104
 105                 /* Both source and destination must be local branches. */
 106                 if (!localname || !starts_with(localname, "refs/heads/"))
 107                         continue;
 108                 if (!remotename || !starts_with(remotename, "refs/heads/"))
 109                         continue;
 110
 111                 if (!pretend)
 112                         install_branch_config(BRANCH_CONFIG_VERBOSE,
 113                                 localname + 11, transport->remote->name,
 114                                 remotename);
 115                 else
 116                         printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
 117                                 localname + 11, remotename + 11,
 118                                 transport->remote->name);
 119         }
 120 }
 121
 122 struct bundle_transport_data {
 123         int fd;
 124         struct bundle_header header;
 125         unsigned get_refs_from_bundle_called : 1;
 126 };
 127
 128 static struct ref *get_refs_from_bundle(struct transport *transport,
 129                                         int for_push,
 130                                         const struct strvec *ref_prefixes)
 131 {
 132         struct bundle_transport_data *data = transport->data;
 133         struct ref *result = NULL;
 134         int i;
 135
 136         if (for_push)
 137                 return NULL;
 138
 139         data->get_refs_from_bundle_called = 1;
 140
 141         if (data->fd > 0)
 142                 close(data->fd);
 143         data->fd = read_bundle_header(transport->url, &data->header);
 144         if (data->fd < 0)
 145                 die(_("could not read bundle '%s'"), transport->url);
 146
 147         transport->hash_algo = data->header.hash_algo;
 148
 149         for (i = 0; i < data->header.references.nr; i++) {
 150                 struct ref_list_entry *e = data->header.references.list + i;
 151                 struct ref *ref = alloc_ref(e->name);
 152                 oidcpy(&ref->old_oid, &e->oid);
 153                 ref->next = result;
 154                 result = ref;
 155         }
 156         return result;
 157 }
 158
 159 static int fetch_refs_from_bundle(struct transport *transport,
 160                                int nr_heads, struct ref **to_fetch)
 161 {
 162         struct bundle_transport_data *data = transport->data;
 163         int ret;
 164
 165         if (!data->get_refs_from_bundle_called)
 166                 get_refs_from_bundle(transport, 0, NULL);
 167         ret = unbundle(the_repository, &data->header, data->fd,
 168                            transport->progress ? BUNDLE_VERBOSE : 0);
 169         transport->hash_algo = data->header.hash_algo;
 170         return ret;
 171 }
 172
 173 static int close_bundle(struct transport *transport)
 174 {
 175         struct bundle_transport_data *data = transport->data;
 176         if (data->fd > 0)
 177                 close(data->fd);
 178         free(data);
 179         return 0;
 180 }
 181
 182 struct git_transport_data {
 183         struct git_transport_options options;
 184         struct child_process *conn;
 185         int fd[2];
 186         unsigned got_remote_heads : 1;
 187         enum protocol_version version;
 188         struct oid_array extra_have;
 189         struct oid_array shallow;
 190 };
 191
 192 static int set_git_option(struct git_transport_options *opts,
 193                           const char *name, const char *value)
 194 {
 195         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 196                 opts->uploadpack = value;
 197                 return 0;
 198         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 199                 opts->receivepack = value;
 200                 return 0;
 201         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 202                 opts->thin = !!value;
 203                 return 0;
 204         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 205                 opts->followtags = !!value;
 206                 return 0;
 207         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 208                 opts->keep = !!value;
 209                 return 0;
 210         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 211                 opts->update_shallow = !!value;
 212                 return 0;
 213         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 214                 if (!value)
 215                         opts->depth = 0;
 216                 else {
 217                         char *end;
 218                         opts->depth = strtol(value, &end, 0);
 219                         if (*end)
 220                                 die(_("transport: invalid depth option '%s'"), value);
 221                 }
 222                 return 0;
 223         } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 224                 opts->deepen_since = value;
 225                 return 0;
 226         } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 227                 opts->deepen_not = (const struct string_list *)value;
 228                 return 0;
 229         } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 230                 opts->deepen_relative = !!value;
 231                 return 0;
 232         } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
 233                 opts->from_promisor = !!value;
 234                 return 0;
 235         } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
 236                 list_objects_filter_die_if_populated(&opts->filter_options);
 237                 parse_list_objects_filter(&opts->filter_options, value);
 238                 return 0;
 239         }
 240         return 1;
 241 }
 242
 243 static int connect_setup(struct transport *transport, int for_push)
 244 {
 245         struct git_transport_data *data = transport->data;
 246         int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 247
 248         if (data->conn)
 249                 return 0;
 250
 251         switch (transport->family) {
 252         case TRANSPORT_FAMILY_ALL: break;
 253         case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 254         case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 255         }
 256
 257         data->conn = git_connect(data->fd, transport->url,
 258                                  for_push ? data->options.receivepack :
 259                                  data->options.uploadpack,
 260                                  flags);
 261
 262         return 0;
 263 }
 264
 265 static void die_if_server_options(struct transport *transport)
 266 {
 267         if (!transport->server_options || !transport->server_options->nr)
 268                 return;
 269         advise(_("see protocol.version in 'git help config' for more details"));
 270         die(_("server options require protocol version 2 or later"));
 271 }
 272
 273 /*
 274  * Obtains the protocol version from the transport and writes it to
 275  * transport->data->version, first connecting if not already connected.
 276  *
 277  * If the protocol version is one that allows skipping the listing of remote
 278  * refs, and must_list_refs is 0, the listing of remote refs is skipped and
 279  * this function returns NULL. Otherwise, this function returns the list of
 280  * remote refs.
 281  */
 282 static struct ref *handshake(struct transport *transport, int for_push,
 283                              const struct strvec *ref_prefixes,
 284                              int must_list_refs)
 285 {
 286         struct git_transport_data *data = transport->data;
 287         struct ref *refs = NULL;
 288         struct packet_reader reader;
 289         int sid_len;
 290         const char *server_sid;
 291
 292         connect_setup(transport, for_push);
 293
 294         packet_reader_init(&reader, data->fd[0], NULL, 0,
 295                            PACKET_READ_CHOMP_NEWLINE |
 296                            PACKET_READ_GENTLE_ON_EOF |
 297                            PACKET_READ_DIE_ON_ERR_PACKET);
 298
 299         data->version = discover_version(&reader);
 300         switch (data->version) {
 301         case protocol_v2:
 302                 if (server_feature_v2("session-id", &server_sid))
 303                         trace2_data_string("transfer", NULL, "server-sid", server_sid);
 304                 if (must_list_refs)
 305                         get_remote_refs(data->fd[1], &reader, &refs, for_push,
 306                                         ref_prefixes,
 307                                         transport->server_options,
 308                                         transport->stateless_rpc);
 309                 break;
 310         case protocol_v1:
 311         case protocol_v0:
 312                 die_if_server_options(transport);
 313                 get_remote_heads(&reader, &refs,
 314                                  for_push ? REF_NORMAL : 0,
 315                                  &data->extra_have,
 316                                  &data->shallow);
 317                 server_sid = server_feature_value("session-id", &sid_len);
 318                 if (server_sid) {
 319                         char *sid = xstrndup(server_sid, sid_len);
 320                         trace2_data_string("transfer", NULL, "server-sid", sid);
 321                         free(sid);
 322                 }
 323                 break;
 324         case protocol_unknown_version:
 325                 BUG("unknown protocol version");
 326         }
 327         data->got_remote_heads = 1;
 328         transport->hash_algo = reader.hash_algo;
 329
 330         if (reader.line_peeked)
 331                 BUG("buffer must be empty at the end of handshake()");
 332
 333         return refs;
 334 }
 335
 336 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
 337                                         const struct strvec *ref_prefixes)
 338 {
 339         return handshake(transport, for_push, ref_prefixes, 1);
 340 }
 341
 342 static int fetch_refs_via_pack(struct transport *transport,
 343                                int nr_heads, struct ref **to_fetch)
 344 {
 345         int ret = 0;
 346         struct git_transport_data *data = transport->data;
 347         struct ref *refs = NULL;
 348         struct fetch_pack_args args;
 349         struct ref *refs_tmp = NULL;
 350
 351         memset(&args, 0, sizeof(args));
 352         args.uploadpack = data->options.uploadpack;
 353         args.keep_pack = data->options.keep;
 354         args.lock_pack = 1;
 355         args.use_thin_pack = data->options.thin;
 356         args.include_tag = data->options.followtags;
 357         args.verbose = (transport->verbose > 1);
 358         args.quiet = (transport->verbose < 0);
 359         args.no_progress = !transport->progress;
 360         args.depth = data->options.depth;
 361         args.deepen_since = data->options.deepen_since;
 362         args.deepen_not = data->options.deepen_not;
 363         args.deepen_relative = data->options.deepen_relative;
 364         args.check_self_contained_and_connected =
 365                 data->options.check_self_contained_and_connected;
 366         args.cloning = transport->cloning;
 367         args.update_shallow = data->options.update_shallow;
 368         args.from_promisor = data->options.from_promisor;
 369         args.filter_options = data->options.filter_options;
 370         args.stateless_rpc = transport->stateless_rpc;
 371         args.server_options = transport->server_options;
 372         args.negotiation_tips = data->options.negotiation_tips;
 373
 374         if (!data->got_remote_heads) {
 375                 int i;
 376                 int must_list_refs = 0;
 377                 for (i = 0; i < nr_heads; i++) {
 378                         if (!to_fetch[i]->exact_oid) {
 379                                 must_list_refs = 1;
 380                                 break;
 381                         }
 382                 }
 383                 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
 384         }
 385
 386         if (data->version == protocol_unknown_version)
 387                 BUG("unknown protocol version");
 388         else if (data->version <= protocol_v1)
 389                 die_if_server_options(transport);
 390
 391         refs = fetch_pack(&args, data->fd,
 392                           refs_tmp ? refs_tmp : transport->remote_refs,
 393                           to_fetch, nr_heads, &data->shallow,
 394                           &transport->pack_lockfiles, data->version);
 395
 396         close(data->fd[0]);
 397         close(data->fd[1]);
 398         if (finish_connect(data->conn))
 399                 ret = -1;
 400         data->conn = NULL;
 401         data->got_remote_heads = 0;
 402         data->options.self_contained_and_connected =
 403                 args.self_contained_and_connected;
 404         data->options.connectivity_checked = args.connectivity_checked;
 405
 406         if (refs == NULL)
 407                 ret = -1;
 408         if (report_unmatched_refs(to_fetch, nr_heads))
 409                 ret = -1;
 410
 411         free_refs(refs_tmp);
 412         free_refs(refs);
 413         return ret;
 414 }
 415
 416 static int push_had_errors(struct ref *ref)
 417 {
 418         for (; ref; ref = ref->next) {
 419                 switch (ref->status) {
 420                 case REF_STATUS_NONE:
 421                 case REF_STATUS_UPTODATE:
 422                 case REF_STATUS_OK:
 423                         break;
 424                 default:
 425                         return 1;
 426                 }
 427         }
 428         return 0;
 429 }
 430
 431 int transport_refs_pushed(struct ref *ref)
 432 {
 433         for (; ref; ref = ref->next) {
 434                 switch(ref->status) {
 435                 case REF_STATUS_NONE:
 436                 case REF_STATUS_UPTODATE:
 437                         break;
 438                 default:
 439                         return 1;
 440                 }
 441         }
 442         return 0;
 443 }
 444
 445 static void update_one_tracking_ref(struct remote *remote, char *refname,
 446                                     struct object_id *new_oid, int deletion,
 447                                     int verbose)
 448 {
 449         struct refspec_item rs;
 450
 451         memset(&rs, 0, sizeof(rs));
 452         rs.src = refname;
 453         rs.dst = NULL;
 454
 455         if (!remote_find_tracking(remote, &rs)) {
 456                 if (verbose)
 457                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 458                 if (deletion)
 459                         delete_ref(NULL, rs.dst, NULL, 0);
 460                 else
 461                         update_ref("update by push", rs.dst, new_oid,
 462                                    NULL, 0, 0);
 463                 free(rs.dst);
 464         }
 465 }
 466
 467 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 468 {
 469         char *refname;
 470         struct object_id *new_oid;
 471         struct ref_push_report *report;
 472
 473         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 474                 return;
 475
 476         report = ref->report;
 477         if (!report)
 478                 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
 479                                         ref->deletion, verbose);
 480         else
 481                 for (; report; report = report->next) {
 482                         refname = report->ref_name ? (char *)report->ref_name : ref->name;
 483                         new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
 484                         update_one_tracking_ref(remote, refname, new_oid,
 485                                                 is_null_oid(new_oid), verbose);
 486                 }
 487 }
 488
 489 static void print_ref_status(char flag, const char *summary,
 490                              struct ref *to, struct ref *from, const char *msg,
 491                              struct ref_push_report *report,
 492                              int porcelain, int summary_width)
 493 {
 494         const char *to_name;
 495
 496         if (report && report->ref_name)
 497                 to_name = report->ref_name;
 498         else
 499                 to_name = to->name;
 500
 501         if (porcelain) {
 502                 if (from)
 503                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 504                 else
 505                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 506                 if (msg)
 507                         fprintf(stdout, "%s (%s)\n", summary, msg);
 508                 else
 509                         fprintf(stdout, "%s\n", summary);
 510         } else {
 511                 const char *red = "", *reset = "";
 512                 if (push_had_errors(to)) {
 513                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 514                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 515                 }
 516                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 517                         summary, reset);
 518                 if (from)
 519                         fprintf(stderr, "%s -> %s",
 520                                 prettify_refname(from->name),
 521                                 prettify_refname(to_name));
 522                 else
 523                         fputs(prettify_refname(to_name), stderr);
 524                 if (msg) {
 525                         fputs(" (", stderr);
 526                         fputs(msg, stderr);
 527                         fputc(')', stderr);
 528                 }
 529                 fputc('\n', stderr);
 530         }
 531 }
 532
 533 static void print_ok_ref_status(struct ref *ref,
 534                                 struct ref_push_report *report,
 535                                 int porcelain, int summary_width)
 536 {
 537         struct object_id *old_oid;
 538         struct object_id *new_oid;
 539         const char *ref_name;
 540         int forced_update;
 541
 542         if (report && report->old_oid)
 543                 old_oid = report->old_oid;
 544         else
 545                 old_oid = &ref->old_oid;
 546         if (report && report->new_oid)
 547                 new_oid = report->new_oid;
 548         else
 549                 new_oid = &ref->new_oid;
 550         if (report && report->forced_update)
 551                 forced_update = report->forced_update;
 552         else
 553                 forced_update = ref->forced_update;
 554         if (report && report->ref_name)
 555                 ref_name = report->ref_name;
 556         else
 557                 ref_name = ref->name;
 558
 559         if (ref->deletion)
 560                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 561                                  report, porcelain, summary_width);
 562         else if (is_null_oid(old_oid))
 563                 print_ref_status('*',
 564                                  (starts_with(ref_name, "refs/tags/")
 565                                   ? "[new tag]"
 566                                   : (starts_with(ref_name, "refs/heads/")
 567                                      ? "[new branch]"
 568                                      : "[new reference]")),
 569                                  ref, ref->peer_ref, NULL,
 570                                  report, porcelain, summary_width);
 571         else {
 572                 struct strbuf quickref = STRBUF_INIT;
 573                 char type;
 574                 const char *msg;
 575
 576                 strbuf_add_unique_abbrev(&quickref, old_oid,
 577                                          DEFAULT_ABBREV);
 578                 if (forced_update) {
 579                         strbuf_addstr(&quickref, "...");
 580                         type = '+';
 581                         msg = "forced update";
 582                 } else {
 583                         strbuf_addstr(&quickref, "..");
 584                         type = ' ';
 585                         msg = NULL;
 586                 }
 587                 strbuf_add_unique_abbrev(&quickref, new_oid,
 588                                          DEFAULT_ABBREV);
 589
 590                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 591                                  report, porcelain, summary_width);
 592                 strbuf_release(&quickref);
 593         }
 594 }
 595
 596 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 597                                  struct ref_push_report *report,
 598                                  int porcelain, int summary_width)
 599 {
 600         if (!count) {
 601                 char *url = transport_anonymize_url(dest);
 602                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 603                 free(url);
 604         }
 605
 606         switch(ref->status) {
 607         case REF_STATUS_NONE:
 608                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 609                                  report, porcelain, summary_width);
 610                 break;
 611         case REF_STATUS_REJECT_NODELETE:
 612                 print_ref_status('!', "[rejected]", ref, NULL,
 613                                  "remote does not support deleting refs",
 614                                  report, porcelain, summary_width);
 615                 break;
 616         case REF_STATUS_UPTODATE:
 617                 print_ref_status('=', "[up to date]", ref,
 618                                  ref->peer_ref, NULL,
 619                                  report, porcelain, summary_width);
 620                 break;
 621         case REF_STATUS_REJECT_NONFASTFORWARD:
 622                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 623                                  "non-fast-forward",
 624                                  report, porcelain, summary_width);
 625                 break;
 626         case REF_STATUS_REJECT_ALREADY_EXISTS:
 627                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 628                                  "already exists",
 629                                  report, porcelain, summary_width);
 630                 break;
 631         case REF_STATUS_REJECT_FETCH_FIRST:
 632                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 633                                  "fetch first",
 634                                  report, porcelain, summary_width);
 635                 break;
 636         case REF_STATUS_REJECT_NEEDS_FORCE:
 637                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 638                                  "needs force",
 639                                  report, porcelain, summary_width);
 640                 break;
 641         case REF_STATUS_REJECT_STALE:
 642                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 643                                  "stale info",
 644                                  report, porcelain, summary_width);
 645                 break;
 646         case REF_STATUS_REJECT_REMOTE_UPDATED:
 647                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 648                                  "remote ref updated since checkout",
 649                                  report, porcelain, summary_width);
 650                 break;
 651         case REF_STATUS_REJECT_SHALLOW:
 652                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 653                                  "new shallow roots not allowed",
 654                                  report, porcelain, summary_width);
 655                 break;
 656         case REF_STATUS_REMOTE_REJECT:
 657                 print_ref_status('!', "[remote rejected]", ref,
 658                                  ref->deletion ? NULL : ref->peer_ref,
 659                                  ref->remote_status,
 660                                  report, porcelain, summary_width);
 661                 break;
 662         case REF_STATUS_EXPECTING_REPORT:
 663                 print_ref_status('!', "[remote failure]", ref,
 664                                  ref->deletion ? NULL : ref->peer_ref,
 665                                  "remote failed to report status",
 666                                  report, porcelain, summary_width);
 667                 break;
 668         case REF_STATUS_ATOMIC_PUSH_FAILED:
 669                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 670                                  "atomic push failed",
 671                                  report, porcelain, summary_width);
 672                 break;
 673         case REF_STATUS_OK:
 674                 print_ok_ref_status(ref, report, porcelain, summary_width);
 675                 break;
 676         }
 677
 678         return 1;
 679 }
 680
 681 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 682                                  int porcelain, int summary_width)
 683 {
 684         struct ref_push_report *report;
 685         int n = 0;
 686
 687         if (!ref->report)
 688                 return print_one_push_report(ref, dest, count,
 689                                              NULL, porcelain, summary_width);
 690
 691         for (report = ref->report; report; report = report->next)
 692                 print_one_push_report(ref, dest, count + n++,
 693                                       report, porcelain, summary_width);
 694         return n;
 695 }
 696
 697 static int measure_abbrev(const struct object_id *oid, int sofar)
 698 {
 699         char hex[GIT_MAX_HEXSZ + 1];
 700         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 701
 702         return (w < sofar) ? sofar : w;
 703 }
 704
 705 int transport_summary_width(const struct ref *refs)
 706 {
 707         int maxw = -1;
 708
 709         for (; refs; refs = refs->next) {
 710                 maxw = measure_abbrev(&refs->old_oid, maxw);
 711                 maxw = measure_abbrev(&refs->new_oid, maxw);
 712         }
 713         if (maxw < 0)
 714                 maxw = FALLBACK_DEFAULT_ABBREV;
 715         return (2 * maxw + 3);
 716 }
 717
 718 void transport_print_push_status(const char *dest, struct ref *refs,
 719                                   int verbose, int porcelain, unsigned int *reject_reasons)
 720 {
 721         struct ref *ref;
 722         int n = 0;
 723         char *head;
 724         int summary_width = transport_summary_width(refs);
 725
 726         if (transport_color_config() < 0)
 727                 warning(_("could not parse transport.color.* config"));
 728
 729         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 730
 731         if (verbose) {
 732                 for (ref = refs; ref; ref = ref->next)
 733                         if (ref->status == REF_STATUS_UPTODATE)
 734                                 n += print_one_push_status(ref, dest, n,
 735                                                            porcelain, summary_width);
 736         }
 737
 738         for (ref = refs; ref; ref = ref->next)
 739                 if (ref->status == REF_STATUS_OK)
 740                         n += print_one_push_status(ref, dest, n,
 741                                                    porcelain, summary_width);
 742
 743         *reject_reasons = 0;
 744         for (ref = refs; ref; ref = ref->next) {
 745                 if (ref->status != REF_STATUS_NONE &&
 746                     ref->status != REF_STATUS_UPTODATE &&
 747                     ref->status != REF_STATUS_OK)
 748                         n += print_one_push_status(ref, dest, n,
 749                                                    porcelain, summary_width);
 750                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 751                         if (head != NULL && !strcmp(head, ref->name))
 752                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 753                         else
 754                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 755                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 756                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 757                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 758                         *reject_reasons |= REJECT_FETCH_FIRST;
 759                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 760                         *reject_reasons |= REJECT_NEEDS_FORCE;
 761                 } else if (ref->status == REF_STATUS_REJECT_REMOTE_UPDATED) {
 762                         *reject_reasons |= REJECT_REF_NEEDS_UPDATE;
 763                 }
 764         }
 765         free(head);
 766 }
 767
 768 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 769 {
 770         struct git_transport_data *data = transport->data;
 771         struct send_pack_args args;
 772         int ret = 0;
 773
 774         if (transport_color_config() < 0)
 775                 return -1;
 776
 777         if (!data->got_remote_heads)
 778                 get_refs_via_connect(transport, 1, NULL);
 779
 780         memset(&args, 0, sizeof(args));
 781         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 782         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 783         args.use_thin_pack = data->options.thin;
 784         args.verbose = (transport->verbose > 0);
 785         args.quiet = (transport->verbose < 0);
 786         args.progress = transport->progress;
 787         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 788         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 789         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 790         args.push_options = transport->push_options;
 791         args.url = transport->url;
 792
 793         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 794                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 795         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 796                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 797         else
 798                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 799
 800         switch (data->version) {
 801         case protocol_v2:
 802                 die(_("support for protocol v2 not implemented yet"));
 803                 break;
 804         case protocol_v1:
 805         case protocol_v0:
 806                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 807                                 &data->extra_have);
 808                 break;
 809         case protocol_unknown_version:
 810                 BUG("unknown protocol version");
 811         }
 812
 813         close(data->fd[1]);
 814         close(data->fd[0]);
 815         /*
 816          * Atomic push may abort the connection early and close the pipe,
 817          * which may cause an error for `finish_connect()`. Ignore this error
 818          * for atomic git-push.
 819          */
 820         if (ret || args.atomic)
 821                 finish_connect(data->conn);
 822         else
 823                 ret = finish_connect(data->conn);
 824         data->conn = NULL;
 825         data->got_remote_heads = 0;
 826
 827         return ret;
 828 }
 829
 830 static int connect_git(struct transport *transport, const char *name,
 831                        const char *executable, int fd[2])
 832 {
 833         struct git_transport_data *data = transport->data;
 834         data->conn = git_connect(data->fd, transport->url,
 835                                  executable, 0);
 836         fd[0] = data->fd[0];
 837         fd[1] = data->fd[1];
 838         return 0;
 839 }
 840
 841 static int disconnect_git(struct transport *transport)
 842 {
 843         struct git_transport_data *data = transport->data;
 844         if (data->conn) {
 845                 if (data->got_remote_heads && !transport->stateless_rpc)
 846                         packet_flush(data->fd[1]);
 847                 close(data->fd[0]);
 848                 close(data->fd[1]);
 849                 finish_connect(data->conn);
 850         }
 851
 852         free(data);
 853         return 0;
 854 }
 855
 856 static struct transport_vtable taken_over_vtable = {
 857         NULL,
 858         get_refs_via_connect,
 859         fetch_refs_via_pack,
 860         git_transport_push,
 861         NULL,
 862         disconnect_git
 863 };
 864
 865 void transport_take_over(struct transport *transport,
 866                          struct child_process *child)
 867 {
 868         struct git_transport_data *data;
 869
 870         if (!transport->smart_options)
 871                 BUG("taking over transport requires non-NULL "
 872                     "smart_options field.");
 873
 874         data = xcalloc(1, sizeof(*data));
 875         data->options = *transport->smart_options;
 876         data->conn = child;
 877         data->fd[0] = data->conn->out;
 878         data->fd[1] = data->conn->in;
 879         data->got_remote_heads = 0;
 880         transport->data = data;
 881
 882         transport->vtable = &taken_over_vtable;
 883         transport->smart_options = &(data->options);
 884
 885         transport->cannot_reuse = 1;
 886 }
 887
 888 static int is_file(const char *url)
 889 {
 890         struct stat buf;
 891         if (stat(url, &buf))
 892                 return 0;
 893         return S_ISREG(buf.st_mode);
 894 }
 895
 896 static int external_specification_len(const char *url)
 897 {
 898         return strchr(url, ':') - url;
 899 }
 900
 901 static const struct string_list *protocol_whitelist(void)
 902 {
 903         static int enabled = -1;
 904         static struct string_list allowed = STRING_LIST_INIT_DUP;
 905
 906         if (enabled < 0) {
 907                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 908                 if (v) {
 909                         string_list_split(&allowed, v, ':', -1);
 910                         string_list_sort(&allowed);
 911                         enabled = 1;
 912                 } else {
 913                         enabled = 0;
 914                 }
 915         }
 916
 917         return enabled ? &allowed : NULL;
 918 }
 919
 920 enum protocol_allow_config {
 921         PROTOCOL_ALLOW_NEVER = 0,
 922         PROTOCOL_ALLOW_USER_ONLY,
 923         PROTOCOL_ALLOW_ALWAYS
 924 };
 925
 926 static enum protocol_allow_config parse_protocol_config(const char *key,
 927                                                         const char *value)
 928 {
 929         if (!strcasecmp(value, "always"))
 930                 return PROTOCOL_ALLOW_ALWAYS;
 931         else if (!strcasecmp(value, "never"))
 932                 return PROTOCOL_ALLOW_NEVER;
 933         else if (!strcasecmp(value, "user"))
 934                 return PROTOCOL_ALLOW_USER_ONLY;
 935
 936         die(_("unknown value for config '%s': %s"), key, value);
 937 }
 938
 939 static enum protocol_allow_config get_protocol_config(const char *type)
 940 {
 941         char *key = xstrfmt("protocol.%s.allow", type);
 942         char *value;
 943
 944         /* first check the per-protocol config */
 945         if (!git_config_get_string(key, &value)) {
 946                 enum protocol_allow_config ret =
 947                         parse_protocol_config(key, value);
 948                 free(key);
 949                 free(value);
 950                 return ret;
 951         }
 952         free(key);
 953
 954         /* if defined, fallback to user-defined default for unknown protocols */
 955         if (!git_config_get_string("protocol.allow", &value)) {
 956                 enum protocol_allow_config ret =
 957                         parse_protocol_config("protocol.allow", value);
 958                 free(value);
 959                 return ret;
 960         }
 961
 962         /* fallback to built-in defaults */
 963         /* known safe */
 964         if (!strcmp(type, "http") ||
 965             !strcmp(type, "https") ||
 966             !strcmp(type, "git") ||
 967             !strcmp(type, "ssh") ||
 968             !strcmp(type, "file"))
 969                 return PROTOCOL_ALLOW_ALWAYS;
 970
 971         /* known scary; err on the side of caution */
 972         if (!strcmp(type, "ext"))
 973                 return PROTOCOL_ALLOW_NEVER;
 974
 975         /* unknown; by default let them be used only directly by the user */
 976         return PROTOCOL_ALLOW_USER_ONLY;
 977 }
 978
 979 int is_transport_allowed(const char *type, int from_user)
 980 {
 981         const struct string_list *whitelist = protocol_whitelist();
 982         if (whitelist)
 983                 return string_list_has_string(whitelist, type);
 984
 985         switch (get_protocol_config(type)) {
 986         case PROTOCOL_ALLOW_ALWAYS:
 987                 return 1;
 988         case PROTOCOL_ALLOW_NEVER:
 989                 return 0;
 990         case PROTOCOL_ALLOW_USER_ONLY:
 991                 if (from_user < 0)
 992                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
 993                 return from_user;
 994         }
 995
 996         BUG("invalid protocol_allow_config type");
 997 }
 998
 999 void transport_check_allowed(const char *type)
1000 {
1001         if (!is_transport_allowed(type, -1))
1002                 die(_("transport '%s' not allowed"), type);
1003 }
1004
1005 static struct transport_vtable bundle_vtable = {
1006         NULL,
1007         get_refs_from_bundle,
1008         fetch_refs_from_bundle,
1009         NULL,
1010         NULL,
1011         close_bundle
1012 };
1013
1014 static struct transport_vtable builtin_smart_vtable = {
1015         NULL,
1016         get_refs_via_connect,
1017         fetch_refs_via_pack,
1018         git_transport_push,
1019         connect_git,
1020         disconnect_git
1021 };
1022
1023 struct transport *transport_get(struct remote *remote, const char *url)
1024 {
1025         const char *helper;
1026         struct transport *ret = xcalloc(1, sizeof(*ret));
1027
1028         ret->progress = isatty(2);
1029         string_list_init(&ret->pack_lockfiles, 1);
1030
1031         if (!remote)
1032                 BUG("No remote provided to transport_get()");
1033
1034         ret->got_remote_refs = 0;
1035         ret->remote = remote;
1036         helper = remote->foreign_vcs;
1037
1038         if (!url && remote->url)
1039                 url = remote->url[0];
1040         ret->url = url;
1041
1042         /* maybe it is a foreign URL? */
1043         if (url) {
1044                 const char *p = url;
1045
1046                 while (is_urlschemechar(p == url, *p))
1047                         p++;
1048                 if (starts_with(p, "::"))
1049                         helper = xstrndup(url, p - url);
1050         }
1051
1052         if (helper) {
1053                 transport_helper_init(ret, helper);
1054         } else if (starts_with(url, "rsync:")) {
1055                 die(_("git-over-rsync is no longer supported"));
1056         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1057                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1058                 transport_check_allowed("file");
1059                 ret->data = data;
1060                 ret->vtable = &bundle_vtable;
1061                 ret->smart_options = NULL;
1062         } else if (!is_url(url)
1063                 || starts_with(url, "file://")
1064                 || starts_with(url, "git://")
1065                 || starts_with(url, "ssh://")
1066                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1067                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1068                 ) {
1069                 /*
1070                  * These are builtin smart transports; "allowed" transports
1071                  * will be checked individually in git_connect.
1072                  */
1073                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1074                 ret->data = data;
1075                 ret->vtable = &builtin_smart_vtable;
1076                 ret->smart_options = &(data->options);
1077
1078                 data->conn = NULL;
1079                 data->got_remote_heads = 0;
1080         } else {
1081                 /* Unknown protocol in URL. Pass to external handler. */
1082                 int len = external_specification_len(url);
1083                 char *handler = xmemdupz(url, len);
1084                 transport_helper_init(ret, handler);
1085         }
1086
1087         if (ret->smart_options) {
1088                 ret->smart_options->thin = 1;
1089                 ret->smart_options->uploadpack = "git-upload-pack";
1090                 if (remote->uploadpack)
1091                         ret->smart_options->uploadpack = remote->uploadpack;
1092                 ret->smart_options->receivepack = "git-receive-pack";
1093                 if (remote->receivepack)
1094                         ret->smart_options->receivepack = remote->receivepack;
1095         }
1096
1097         ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1098
1099         return ret;
1100 }
1101
1102 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1103 {
1104         return transport->hash_algo;
1105 }
1106
1107 int transport_set_option(struct transport *transport,
1108                          const char *name, const char *value)
1109 {
1110         int git_reports = 1, protocol_reports = 1;
1111
1112         if (transport->smart_options)
1113                 git_reports = set_git_option(transport->smart_options,
1114                                              name, value);
1115
1116         if (transport->vtable->set_option)
1117                 protocol_reports = transport->vtable->set_option(transport,
1118                                                                  name, value);
1119
1120         /* If either report is 0, report 0 (success). */
1121         if (!git_reports || !protocol_reports)
1122                 return 0;
1123         /* If either reports -1 (invalid value), report -1. */
1124         if ((git_reports == -1) || (protocol_reports == -1))
1125                 return -1;
1126         /* Otherwise if both report unknown, report unknown. */
1127         return 1;
1128 }
1129
1130 void transport_set_verbosity(struct transport *transport, int verbosity,
1131         int force_progress)
1132 {
1133         if (verbosity >= 1)
1134                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1135         if (verbosity < 0)
1136                 transport->verbose = -1;
1137
1138         /**
1139          * Rules used to determine whether to report progress (processing aborts
1140          * when a rule is satisfied):
1141          *
1142          *   . Report progress, if force_progress is 1 (ie. --progress).
1143          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1144          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1145          *   . Report progress if isatty(2) is 1.
1146          **/
1147         if (force_progress >= 0)
1148                 transport->progress = !!force_progress;
1149         else
1150                 transport->progress = verbosity >= 0 && isatty(2);
1151 }
1152
1153 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1154 {
1155         int i;
1156
1157         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1158                         "not be found on any remote:\n"));
1159         for (i = 0; i < needs_pushing->nr; i++)
1160                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1161         fprintf(stderr, _("\nPlease try\n\n"
1162                           "     git push --recurse-submodules=on-demand\n\n"
1163                           "or cd to the path and use\n\n"
1164                           "     git push\n\n"
1165                           "to push them to a remote.\n\n"));
1166
1167         string_list_clear(needs_pushing, 0);
1168
1169         die(_("Aborting."));
1170 }
1171
1172 static int run_pre_push_hook(struct transport *transport,
1173                              struct ref *remote_refs)
1174 {
1175         int ret = 0, x;
1176         struct ref *r;
1177         struct child_process proc = CHILD_PROCESS_INIT;
1178         struct strbuf buf;
1179         const char *argv[4];
1180
1181         if (!(argv[0] = find_hook("pre-push")))
1182                 return 0;
1183
1184         argv[1] = transport->remote->name;
1185         argv[2] = transport->url;
1186         argv[3] = NULL;
1187
1188         proc.argv = argv;
1189         proc.in = -1;
1190         proc.trace2_hook_name = "pre-push";
1191
1192         if (start_command(&proc)) {
1193                 finish_command(&proc);
1194                 return -1;
1195         }
1196
1197         sigchain_push(SIGPIPE, SIG_IGN);
1198
1199         strbuf_init(&buf, 256);
1200
1201         for (r = remote_refs; r; r = r->next) {
1202                 if (!r->peer_ref) continue;
1203                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1204                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1205                 if (r->status == REF_STATUS_REJECT_REMOTE_UPDATED) continue;
1206                 if (r->status == REF_STATUS_UPTODATE) continue;
1207
1208                 strbuf_reset(&buf);
1209                 strbuf_addf( &buf, "%s %s %s %s\n",
1210                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1211                          r->name, oid_to_hex(&r->old_oid));
1212
1213                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1214                         /* We do not mind if a hook does not read all refs. */
1215                         if (errno != EPIPE)
1216                                 ret = -1;
1217                         break;
1218                 }
1219         }
1220
1221         strbuf_release(&buf);
1222
1223         x = close(proc.in);
1224         if (!ret)
1225                 ret = x;
1226
1227         sigchain_pop(SIGPIPE);
1228
1229         x = finish_command(&proc);
1230         if (!ret)
1231                 ret = x;
1232
1233         return ret;
1234 }
1235
1236 int transport_push(struct repository *r,
1237                    struct transport *transport,
1238                    struct refspec *rs, int flags,
1239                    unsigned int *reject_reasons)
1240 {
1241         *reject_reasons = 0;
1242
1243         if (transport_color_config() < 0)
1244                 return -1;
1245
1246         if (transport->vtable->push_refs) {
1247                 struct ref *remote_refs;
1248                 struct ref *local_refs = get_local_heads();
1249                 int match_flags = MATCH_REFS_NONE;
1250                 int verbose = (transport->verbose > 0);
1251                 int quiet = (transport->verbose < 0);
1252                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1253                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1254                 int push_ret, ret, err;
1255                 struct strvec ref_prefixes = STRVEC_INIT;
1256
1257                 if (check_push_refs(local_refs, rs) < 0)
1258                         return -1;
1259
1260                 refspec_ref_prefixes(rs, &ref_prefixes);
1261
1262                 trace2_region_enter("transport_push", "get_refs_list", r);
1263                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1264                                                                &ref_prefixes);
1265                 trace2_region_leave("transport_push", "get_refs_list", r);
1266
1267                 strvec_clear(&ref_prefixes);
1268
1269                 if (flags & TRANSPORT_PUSH_ALL)
1270                         match_flags |= MATCH_REFS_ALL;
1271                 if (flags & TRANSPORT_PUSH_MIRROR)
1272                         match_flags |= MATCH_REFS_MIRROR;
1273                 if (flags & TRANSPORT_PUSH_PRUNE)
1274                         match_flags |= MATCH_REFS_PRUNE;
1275                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1276                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1277
1278                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1279                         return -1;
1280
1281                 if (transport->smart_options &&
1282                     transport->smart_options->cas &&
1283                     !is_empty_cas(transport->smart_options->cas))
1284                         apply_push_cas(transport->smart_options->cas,
1285                                        transport->remote, remote_refs);
1286
1287                 set_ref_status_for_push(remote_refs,
1288                         flags & TRANSPORT_PUSH_MIRROR,
1289                         flags & TRANSPORT_PUSH_FORCE);
1290
1291                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1292                         if (run_pre_push_hook(transport, remote_refs))
1293                                 return -1;
1294
1295                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1296                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1297                     !is_bare_repository()) {
1298                         struct ref *ref = remote_refs;
1299                         struct oid_array commits = OID_ARRAY_INIT;
1300
1301                         trace2_region_enter("transport_push", "push_submodules", r);
1302                         for (; ref; ref = ref->next)
1303                                 if (!is_null_oid(&ref->new_oid))
1304                                         oid_array_append(&commits,
1305                                                           &ref->new_oid);
1306
1307                         if (!push_unpushed_submodules(r,
1308                                                       &commits,
1309                                                       transport->remote,
1310                                                       rs,
1311                                                       transport->push_options,
1312                                                       pretend)) {
1313                                 oid_array_clear(&commits);
1314                                 trace2_region_leave("transport_push", "push_submodules", r);
1315                                 die(_("failed to push all needed submodules"));
1316                         }
1317                         oid_array_clear(&commits);
1318                         trace2_region_leave("transport_push", "push_submodules", r);
1319                 }
1320
1321                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1322                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1323                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1324                       !pretend)) && !is_bare_repository()) {
1325                         struct ref *ref = remote_refs;
1326                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1327                         struct oid_array commits = OID_ARRAY_INIT;
1328
1329                         trace2_region_enter("transport_push", "check_submodules", r);
1330                         for (; ref; ref = ref->next)
1331                                 if (!is_null_oid(&ref->new_oid))
1332                                         oid_array_append(&commits,
1333                                                           &ref->new_oid);
1334
1335                         if (find_unpushed_submodules(r,
1336                                                      &commits,
1337                                                      transport->remote->name,
1338                                                      &needs_pushing)) {
1339                                 oid_array_clear(&commits);
1340                                 trace2_region_leave("transport_push", "check_submodules", r);
1341                                 die_with_unpushed_submodules(&needs_pushing);
1342                         }
1343                         string_list_clear(&needs_pushing, 0);
1344                         oid_array_clear(&commits);
1345                         trace2_region_leave("transport_push", "check_submodules", r);
1346                 }
1347
1348                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1349                         trace2_region_enter("transport_push", "push_refs", r);
1350                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1351                         trace2_region_leave("transport_push", "push_refs", r);
1352                 } else
1353                         push_ret = 0;
1354                 err = push_had_errors(remote_refs);
1355                 ret = push_ret | err;
1356
1357                 if (!quiet || err)
1358                         transport_print_push_status(transport->url, remote_refs,
1359                                         verbose | porcelain, porcelain,
1360                                         reject_reasons);
1361
1362                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1363                         set_upstreams(transport, remote_refs, pretend);
1364
1365                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1366                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1367                         struct ref *ref;
1368                         for (ref = remote_refs; ref; ref = ref->next)
1369                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1370                 }
1371
1372                 if (porcelain && !push_ret)
1373                         puts("Done");
1374                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1375                         fprintf(stderr, "Everything up-to-date\n");
1376
1377                 return ret;
1378         }
1379         return 1;
1380 }
1381
1382 const struct ref *transport_get_remote_refs(struct transport *transport,
1383                                             const struct strvec *ref_prefixes)
1384 {
1385         if (!transport->got_remote_refs) {
1386                 transport->remote_refs =
1387                         transport->vtable->get_refs_list(transport, 0,
1388                                                          ref_prefixes);
1389                 transport->got_remote_refs = 1;
1390         }
1391
1392         return transport->remote_refs;
1393 }
1394
1395 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1396 {
1397         int rc;
1398         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1399         struct ref **heads = NULL;
1400         struct ref *rm;
1401
1402         for (rm = refs; rm; rm = rm->next) {
1403                 nr_refs++;
1404                 if (rm->peer_ref &&
1405                     !is_null_oid(&rm->old_oid) &&
1406                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1407                         continue;
1408                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1409                 heads[nr_heads++] = rm;
1410         }
1411
1412         if (!nr_heads) {
1413                 /*
1414                  * When deepening of a shallow repository is requested,
1415                  * then local and remote refs are likely to still be equal.
1416                  * Just feed them all to the fetch method in that case.
1417                  * This condition shouldn't be met in a non-deepening fetch
1418                  * (see builtin/fetch.c:quickfetch()).
1419                  */
1420                 ALLOC_ARRAY(heads, nr_refs);
1421                 for (rm = refs; rm; rm = rm->next)
1422                         heads[nr_heads++] = rm;
1423         }
1424
1425         rc = transport->vtable->fetch(transport, nr_heads, heads);
1426
1427         free(heads);
1428         return rc;
1429 }
1430
1431 void transport_unlock_pack(struct transport *transport)
1432 {
1433         int i;
1434
1435         for (i = 0; i < transport->pack_lockfiles.nr; i++)
1436                 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1437         string_list_clear(&transport->pack_lockfiles, 0);
1438 }
1439
1440 int transport_connect(struct transport *transport, const char *name,
1441                       const char *exec, int fd[2])
1442 {
1443         if (transport->vtable->connect)
1444                 return transport->vtable->connect(transport, name, exec, fd);
1445         else
1446                 die(_("operation not supported by protocol"));
1447 }
1448
1449 int transport_disconnect(struct transport *transport)
1450 {
1451         int ret = 0;
1452         if (transport->vtable->disconnect)
1453                 ret = transport->vtable->disconnect(transport);
1454         free(transport);
1455         return ret;
1456 }
1457
1458 /*
1459  * Strip username (and password) from a URL and return
1460  * it in a newly allocated string.
1461  */
1462 char *transport_anonymize_url(const char *url)
1463 {
1464         char *scheme_prefix, *anon_part;
1465         size_t anon_len, prefix_len = 0;
1466
1467         anon_part = strchr(url, '@');
1468         if (url_is_local_not_ssh(url) || !anon_part)
1469                 goto literal_copy;
1470
1471         anon_len = strlen(++anon_part);
1472         scheme_prefix = strstr(url, "://");
1473         if (!scheme_prefix) {
1474                 if (!strchr(anon_part, ':'))
1475                         /* cannot be "me@there:/path/name" */
1476                         goto literal_copy;
1477         } else {
1478                 const char *cp;
1479                 /* make sure scheme is reasonable */
1480                 for (cp = url; cp < scheme_prefix; cp++) {
1481                         switch (*cp) {
1482                                 /* RFC 1738 2.1 */
1483                         case '+': case '.': case '-':
1484                                 break; /* ok */
1485                         default:
1486                                 if (isalnum(*cp))
1487                                         break;
1488                                 /* it isn't */
1489                                 goto literal_copy;
1490                         }
1491                 }
1492                 /* @ past the first slash does not count */
1493                 cp = strchr(scheme_prefix + 3, '/');
1494                 if (cp && cp < anon_part)
1495                         goto literal_copy;
1496                 prefix_len = scheme_prefix - url + 3;
1497         }
1498         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1499                        (int)anon_len, anon_part);
1500 literal_copy:
1501         return xstrdup(url);
1502 }