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         if (data->options.acked_commits) {
 396                 if (data->version < protocol_v2) {
 397                         warning(_("--negotiate-only requires protocol v2"));
 398                         ret = -1;
 399                 } else if (!server_supports_feature("fetch", "wait-for-done", 0)) {
 400                         warning(_("server does not support wait-for-done"));
 401                         ret = -1;
 402                 } else {
 403                         negotiate_using_fetch(data->options.negotiation_tips,
 404                                               transport->server_options,
 405                                               transport->stateless_rpc,
 406                                               data->fd,
 407                                               data->options.acked_commits);
 408                         ret = 0;
 409                 }
 410                 goto cleanup;
 411         }
 412
 413         refs = fetch_pack(&args, data->fd,
 414                           refs_tmp ? refs_tmp : transport->remote_refs,
 415                           to_fetch, nr_heads, &data->shallow,
 416                           &transport->pack_lockfiles, data->version);
 417
 418         data->got_remote_heads = 0;
 419         data->options.self_contained_and_connected =
 420                 args.self_contained_and_connected;
 421         data->options.connectivity_checked = args.connectivity_checked;
 422
 423         if (refs == NULL)
 424                 ret = -1;
 425         if (report_unmatched_refs(to_fetch, nr_heads))
 426                 ret = -1;
 427
 428 cleanup:
 429         close(data->fd[0]);
 430         if (data->fd[1] >= 0)
 431                 close(data->fd[1]);
 432         if (finish_connect(data->conn))
 433                 ret = -1;
 434         data->conn = NULL;
 435
 436         free_refs(refs_tmp);
 437         free_refs(refs);
 438         return ret;
 439 }
 440
 441 static int push_had_errors(struct ref *ref)
 442 {
 443         for (; ref; ref = ref->next) {
 444                 switch (ref->status) {
 445                 case REF_STATUS_NONE:
 446                 case REF_STATUS_UPTODATE:
 447                 case REF_STATUS_OK:
 448                         break;
 449                 default:
 450                         return 1;
 451                 }
 452         }
 453         return 0;
 454 }
 455
 456 int transport_refs_pushed(struct ref *ref)
 457 {
 458         for (; ref; ref = ref->next) {
 459                 switch(ref->status) {
 460                 case REF_STATUS_NONE:
 461                 case REF_STATUS_UPTODATE:
 462                         break;
 463                 default:
 464                         return 1;
 465                 }
 466         }
 467         return 0;
 468 }
 469
 470 static void update_one_tracking_ref(struct remote *remote, char *refname,
 471                                     struct object_id *new_oid, int deletion,
 472                                     int verbose)
 473 {
 474         struct refspec_item rs;
 475
 476         memset(&rs, 0, sizeof(rs));
 477         rs.src = refname;
 478         rs.dst = NULL;
 479
 480         if (!remote_find_tracking(remote, &rs)) {
 481                 if (verbose)
 482                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 483                 if (deletion)
 484                         delete_ref(NULL, rs.dst, NULL, 0);
 485                 else
 486                         update_ref("update by push", rs.dst, new_oid,
 487                                    NULL, 0, 0);
 488                 free(rs.dst);
 489         }
 490 }
 491
 492 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 493 {
 494         char *refname;
 495         struct object_id *new_oid;
 496         struct ref_push_report *report;
 497
 498         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 499                 return;
 500
 501         report = ref->report;
 502         if (!report)
 503                 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
 504                                         ref->deletion, verbose);
 505         else
 506                 for (; report; report = report->next) {
 507                         refname = report->ref_name ? (char *)report->ref_name : ref->name;
 508                         new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
 509                         update_one_tracking_ref(remote, refname, new_oid,
 510                                                 is_null_oid(new_oid), verbose);
 511                 }
 512 }
 513
 514 static void print_ref_status(char flag, const char *summary,
 515                              struct ref *to, struct ref *from, const char *msg,
 516                              struct ref_push_report *report,
 517                              int porcelain, int summary_width)
 518 {
 519         const char *to_name;
 520
 521         if (report && report->ref_name)
 522                 to_name = report->ref_name;
 523         else
 524                 to_name = to->name;
 525
 526         if (porcelain) {
 527                 if (from)
 528                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 529                 else
 530                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 531                 if (msg)
 532                         fprintf(stdout, "%s (%s)\n", summary, msg);
 533                 else
 534                         fprintf(stdout, "%s\n", summary);
 535         } else {
 536                 const char *red = "", *reset = "";
 537                 if (push_had_errors(to)) {
 538                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 539                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 540                 }
 541                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 542                         summary, reset);
 543                 if (from)
 544                         fprintf(stderr, "%s -> %s",
 545                                 prettify_refname(from->name),
 546                                 prettify_refname(to_name));
 547                 else
 548                         fputs(prettify_refname(to_name), stderr);
 549                 if (msg) {
 550                         fputs(" (", stderr);
 551                         fputs(msg, stderr);
 552                         fputc(')', stderr);
 553                 }
 554                 fputc('\n', stderr);
 555         }
 556 }
 557
 558 static void print_ok_ref_status(struct ref *ref,
 559                                 struct ref_push_report *report,
 560                                 int porcelain, int summary_width)
 561 {
 562         struct object_id *old_oid;
 563         struct object_id *new_oid;
 564         const char *ref_name;
 565         int forced_update;
 566
 567         if (report && report->old_oid)
 568                 old_oid = report->old_oid;
 569         else
 570                 old_oid = &ref->old_oid;
 571         if (report && report->new_oid)
 572                 new_oid = report->new_oid;
 573         else
 574                 new_oid = &ref->new_oid;
 575         if (report && report->forced_update)
 576                 forced_update = report->forced_update;
 577         else
 578                 forced_update = ref->forced_update;
 579         if (report && report->ref_name)
 580                 ref_name = report->ref_name;
 581         else
 582                 ref_name = ref->name;
 583
 584         if (ref->deletion)
 585                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 586                                  report, porcelain, summary_width);
 587         else if (is_null_oid(old_oid))
 588                 print_ref_status('*',
 589                                  (starts_with(ref_name, "refs/tags/")
 590                                   ? "[new tag]"
 591                                   : (starts_with(ref_name, "refs/heads/")
 592                                      ? "[new branch]"
 593                                      : "[new reference]")),
 594                                  ref, ref->peer_ref, NULL,
 595                                  report, porcelain, summary_width);
 596         else {
 597                 struct strbuf quickref = STRBUF_INIT;
 598                 char type;
 599                 const char *msg;
 600
 601                 strbuf_add_unique_abbrev(&quickref, old_oid,
 602                                          DEFAULT_ABBREV);
 603                 if (forced_update) {
 604                         strbuf_addstr(&quickref, "...");
 605                         type = '+';
 606                         msg = "forced update";
 607                 } else {
 608                         strbuf_addstr(&quickref, "..");
 609                         type = ' ';
 610                         msg = NULL;
 611                 }
 612                 strbuf_add_unique_abbrev(&quickref, new_oid,
 613                                          DEFAULT_ABBREV);
 614
 615                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 616                                  report, porcelain, summary_width);
 617                 strbuf_release(&quickref);
 618         }
 619 }
 620
 621 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 622                                  struct ref_push_report *report,
 623                                  int porcelain, int summary_width)
 624 {
 625         if (!count) {
 626                 char *url = transport_anonymize_url(dest);
 627                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 628                 free(url);
 629         }
 630
 631         switch(ref->status) {
 632         case REF_STATUS_NONE:
 633                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 634                                  report, porcelain, summary_width);
 635                 break;
 636         case REF_STATUS_REJECT_NODELETE:
 637                 print_ref_status('!', "[rejected]", ref, NULL,
 638                                  "remote does not support deleting refs",
 639                                  report, porcelain, summary_width);
 640                 break;
 641         case REF_STATUS_UPTODATE:
 642                 print_ref_status('=', "[up to date]", ref,
 643                                  ref->peer_ref, NULL,
 644                                  report, porcelain, summary_width);
 645                 break;
 646         case REF_STATUS_REJECT_NONFASTFORWARD:
 647                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 648                                  "non-fast-forward",
 649                                  report, porcelain, summary_width);
 650                 break;
 651         case REF_STATUS_REJECT_ALREADY_EXISTS:
 652                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 653                                  "already exists",
 654                                  report, porcelain, summary_width);
 655                 break;
 656         case REF_STATUS_REJECT_FETCH_FIRST:
 657                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 658                                  "fetch first",
 659                                  report, porcelain, summary_width);
 660                 break;
 661         case REF_STATUS_REJECT_NEEDS_FORCE:
 662                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 663                                  "needs force",
 664                                  report, porcelain, summary_width);
 665                 break;
 666         case REF_STATUS_REJECT_STALE:
 667                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 668                                  "stale info",
 669                                  report, porcelain, summary_width);
 670                 break;
 671         case REF_STATUS_REJECT_REMOTE_UPDATED:
 672                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 673                                  "remote ref updated since checkout",
 674                                  report, porcelain, summary_width);
 675                 break;
 676         case REF_STATUS_REJECT_SHALLOW:
 677                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 678                                  "new shallow roots not allowed",
 679                                  report, porcelain, summary_width);
 680                 break;
 681         case REF_STATUS_REMOTE_REJECT:
 682                 print_ref_status('!', "[remote rejected]", ref,
 683                                  ref->deletion ? NULL : ref->peer_ref,
 684                                  ref->remote_status,
 685                                  report, porcelain, summary_width);
 686                 break;
 687         case REF_STATUS_EXPECTING_REPORT:
 688                 print_ref_status('!', "[remote failure]", ref,
 689                                  ref->deletion ? NULL : ref->peer_ref,
 690                                  "remote failed to report status",
 691                                  report, porcelain, summary_width);
 692                 break;
 693         case REF_STATUS_ATOMIC_PUSH_FAILED:
 694                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 695                                  "atomic push failed",
 696                                  report, porcelain, summary_width);
 697                 break;
 698         case REF_STATUS_OK:
 699                 print_ok_ref_status(ref, report, porcelain, summary_width);
 700                 break;
 701         }
 702
 703         return 1;
 704 }
 705
 706 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 707                                  int porcelain, int summary_width)
 708 {
 709         struct ref_push_report *report;
 710         int n = 0;
 711
 712         if (!ref->report)
 713                 return print_one_push_report(ref, dest, count,
 714                                              NULL, porcelain, summary_width);
 715
 716         for (report = ref->report; report; report = report->next)
 717                 print_one_push_report(ref, dest, count + n++,
 718                                       report, porcelain, summary_width);
 719         return n;
 720 }
 721
 722 static int measure_abbrev(const struct object_id *oid, int sofar)
 723 {
 724         char hex[GIT_MAX_HEXSZ + 1];
 725         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 726
 727         return (w < sofar) ? sofar : w;
 728 }
 729
 730 int transport_summary_width(const struct ref *refs)
 731 {
 732         int maxw = -1;
 733
 734         for (; refs; refs = refs->next) {
 735                 maxw = measure_abbrev(&refs->old_oid, maxw);
 736                 maxw = measure_abbrev(&refs->new_oid, maxw);
 737         }
 738         if (maxw < 0)
 739                 maxw = FALLBACK_DEFAULT_ABBREV;
 740         return (2 * maxw + 3);
 741 }
 742
 743 void transport_print_push_status(const char *dest, struct ref *refs,
 744                                   int verbose, int porcelain, unsigned int *reject_reasons)
 745 {
 746         struct ref *ref;
 747         int n = 0;
 748         char *head;
 749         int summary_width = transport_summary_width(refs);
 750
 751         if (transport_color_config() < 0)
 752                 warning(_("could not parse transport.color.* config"));
 753
 754         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 755
 756         if (verbose) {
 757                 for (ref = refs; ref; ref = ref->next)
 758                         if (ref->status == REF_STATUS_UPTODATE)
 759                                 n += print_one_push_status(ref, dest, n,
 760                                                            porcelain, summary_width);
 761         }
 762
 763         for (ref = refs; ref; ref = ref->next)
 764                 if (ref->status == REF_STATUS_OK)
 765                         n += print_one_push_status(ref, dest, n,
 766                                                    porcelain, summary_width);
 767
 768         *reject_reasons = 0;
 769         for (ref = refs; ref; ref = ref->next) {
 770                 if (ref->status != REF_STATUS_NONE &&
 771                     ref->status != REF_STATUS_UPTODATE &&
 772                     ref->status != REF_STATUS_OK)
 773                         n += print_one_push_status(ref, dest, n,
 774                                                    porcelain, summary_width);
 775                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 776                         if (head != NULL && !strcmp(head, ref->name))
 777                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 778                         else
 779                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 780                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 781                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 782                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 783                         *reject_reasons |= REJECT_FETCH_FIRST;
 784                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 785                         *reject_reasons |= REJECT_NEEDS_FORCE;
 786                 } else if (ref->status == REF_STATUS_REJECT_REMOTE_UPDATED) {
 787                         *reject_reasons |= REJECT_REF_NEEDS_UPDATE;
 788                 }
 789         }
 790         free(head);
 791 }
 792
 793 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 794 {
 795         struct git_transport_data *data = transport->data;
 796         struct send_pack_args args;
 797         int ret = 0;
 798
 799         if (transport_color_config() < 0)
 800                 return -1;
 801
 802         if (!data->got_remote_heads)
 803                 get_refs_via_connect(transport, 1, NULL);
 804
 805         memset(&args, 0, sizeof(args));
 806         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 807         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 808         args.use_thin_pack = data->options.thin;
 809         args.verbose = (transport->verbose > 0);
 810         args.quiet = (transport->verbose < 0);
 811         args.progress = transport->progress;
 812         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 813         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 814         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 815         args.push_options = transport->push_options;
 816         args.url = transport->url;
 817
 818         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 819                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 820         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 821                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 822         else
 823                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 824
 825         switch (data->version) {
 826         case protocol_v2:
 827                 die(_("support for protocol v2 not implemented yet"));
 828                 break;
 829         case protocol_v1:
 830         case protocol_v0:
 831                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 832                                 &data->extra_have);
 833                 break;
 834         case protocol_unknown_version:
 835                 BUG("unknown protocol version");
 836         }
 837
 838         close(data->fd[1]);
 839         close(data->fd[0]);
 840         /*
 841          * Atomic push may abort the connection early and close the pipe,
 842          * which may cause an error for `finish_connect()`. Ignore this error
 843          * for atomic git-push.
 844          */
 845         if (ret || args.atomic)
 846                 finish_connect(data->conn);
 847         else
 848                 ret = finish_connect(data->conn);
 849         data->conn = NULL;
 850         data->got_remote_heads = 0;
 851
 852         return ret;
 853 }
 854
 855 static int connect_git(struct transport *transport, const char *name,
 856                        const char *executable, int fd[2])
 857 {
 858         struct git_transport_data *data = transport->data;
 859         data->conn = git_connect(data->fd, transport->url,
 860                                  executable, 0);
 861         fd[0] = data->fd[0];
 862         fd[1] = data->fd[1];
 863         return 0;
 864 }
 865
 866 static int disconnect_git(struct transport *transport)
 867 {
 868         struct git_transport_data *data = transport->data;
 869         if (data->conn) {
 870                 if (data->got_remote_heads && !transport->stateless_rpc)
 871                         packet_flush(data->fd[1]);
 872                 close(data->fd[0]);
 873                 if (data->fd[1] >= 0)
 874                         close(data->fd[1]);
 875                 finish_connect(data->conn);
 876         }
 877
 878         free(data);
 879         return 0;
 880 }
 881
 882 static struct transport_vtable taken_over_vtable = {
 883         NULL,
 884         get_refs_via_connect,
 885         fetch_refs_via_pack,
 886         git_transport_push,
 887         NULL,
 888         disconnect_git
 889 };
 890
 891 void transport_take_over(struct transport *transport,
 892                          struct child_process *child)
 893 {
 894         struct git_transport_data *data;
 895
 896         if (!transport->smart_options)
 897                 BUG("taking over transport requires non-NULL "
 898                     "smart_options field.");
 899
 900         CALLOC_ARRAY(data, 1);
 901         data->options = *transport->smart_options;
 902         data->conn = child;
 903         data->fd[0] = data->conn->out;
 904         data->fd[1] = data->conn->in;
 905         data->got_remote_heads = 0;
 906         transport->data = data;
 907
 908         transport->vtable = &taken_over_vtable;
 909         transport->smart_options = &(data->options);
 910
 911         transport->cannot_reuse = 1;
 912 }
 913
 914 static int is_file(const char *url)
 915 {
 916         struct stat buf;
 917         if (stat(url, &buf))
 918                 return 0;
 919         return S_ISREG(buf.st_mode);
 920 }
 921
 922 static int external_specification_len(const char *url)
 923 {
 924         return strchr(url, ':') - url;
 925 }
 926
 927 static const struct string_list *protocol_whitelist(void)
 928 {
 929         static int enabled = -1;
 930         static struct string_list allowed = STRING_LIST_INIT_DUP;
 931
 932         if (enabled < 0) {
 933                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 934                 if (v) {
 935                         string_list_split(&allowed, v, ':', -1);
 936                         string_list_sort(&allowed);
 937                         enabled = 1;
 938                 } else {
 939                         enabled = 0;
 940                 }
 941         }
 942
 943         return enabled ? &allowed : NULL;
 944 }
 945
 946 enum protocol_allow_config {
 947         PROTOCOL_ALLOW_NEVER = 0,
 948         PROTOCOL_ALLOW_USER_ONLY,
 949         PROTOCOL_ALLOW_ALWAYS
 950 };
 951
 952 static enum protocol_allow_config parse_protocol_config(const char *key,
 953                                                         const char *value)
 954 {
 955         if (!strcasecmp(value, "always"))
 956                 return PROTOCOL_ALLOW_ALWAYS;
 957         else if (!strcasecmp(value, "never"))
 958                 return PROTOCOL_ALLOW_NEVER;
 959         else if (!strcasecmp(value, "user"))
 960                 return PROTOCOL_ALLOW_USER_ONLY;
 961
 962         die(_("unknown value for config '%s': %s"), key, value);
 963 }
 964
 965 static enum protocol_allow_config get_protocol_config(const char *type)
 966 {
 967         char *key = xstrfmt("protocol.%s.allow", type);
 968         char *value;
 969
 970         /* first check the per-protocol config */
 971         if (!git_config_get_string(key, &value)) {
 972                 enum protocol_allow_config ret =
 973                         parse_protocol_config(key, value);
 974                 free(key);
 975                 free(value);
 976                 return ret;
 977         }
 978         free(key);
 979
 980         /* if defined, fallback to user-defined default for unknown protocols */
 981         if (!git_config_get_string("protocol.allow", &value)) {
 982                 enum protocol_allow_config ret =
 983                         parse_protocol_config("protocol.allow", value);
 984                 free(value);
 985                 return ret;
 986         }
 987
 988         /* fallback to built-in defaults */
 989         /* known safe */
 990         if (!strcmp(type, "http") ||
 991             !strcmp(type, "https") ||
 992             !strcmp(type, "git") ||
 993             !strcmp(type, "ssh") ||
 994             !strcmp(type, "file"))
 995                 return PROTOCOL_ALLOW_ALWAYS;
 996
 997         /* known scary; err on the side of caution */
 998         if (!strcmp(type, "ext"))
 999                 return PROTOCOL_ALLOW_NEVER;
1000
1001         /* unknown; by default let them be used only directly by the user */
1002         return PROTOCOL_ALLOW_USER_ONLY;
1003 }
1004
1005 int is_transport_allowed(const char *type, int from_user)
1006 {
1007         const struct string_list *whitelist = protocol_whitelist();
1008         if (whitelist)
1009                 return string_list_has_string(whitelist, type);
1010
1011         switch (get_protocol_config(type)) {
1012         case PROTOCOL_ALLOW_ALWAYS:
1013                 return 1;
1014         case PROTOCOL_ALLOW_NEVER:
1015                 return 0;
1016         case PROTOCOL_ALLOW_USER_ONLY:
1017                 if (from_user < 0)
1018                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
1019                 return from_user;
1020         }
1021
1022         BUG("invalid protocol_allow_config type");
1023 }
1024
1025 void transport_check_allowed(const char *type)
1026 {
1027         if (!is_transport_allowed(type, -1))
1028                 die(_("transport '%s' not allowed"), type);
1029 }
1030
1031 static struct transport_vtable bundle_vtable = {
1032         NULL,
1033         get_refs_from_bundle,
1034         fetch_refs_from_bundle,
1035         NULL,
1036         NULL,
1037         close_bundle
1038 };
1039
1040 static struct transport_vtable builtin_smart_vtable = {
1041         NULL,
1042         get_refs_via_connect,
1043         fetch_refs_via_pack,
1044         git_transport_push,
1045         connect_git,
1046         disconnect_git
1047 };
1048
1049 struct transport *transport_get(struct remote *remote, const char *url)
1050 {
1051         const char *helper;
1052         struct transport *ret = xcalloc(1, sizeof(*ret));
1053
1054         ret->progress = isatty(2);
1055         string_list_init(&ret->pack_lockfiles, 1);
1056
1057         if (!remote)
1058                 BUG("No remote provided to transport_get()");
1059
1060         ret->got_remote_refs = 0;
1061         ret->remote = remote;
1062         helper = remote->foreign_vcs;
1063
1064         if (!url && remote->url)
1065                 url = remote->url[0];
1066         ret->url = url;
1067
1068         /* maybe it is a foreign URL? */
1069         if (url) {
1070                 const char *p = url;
1071
1072                 while (is_urlschemechar(p == url, *p))
1073                         p++;
1074                 if (starts_with(p, "::"))
1075                         helper = xstrndup(url, p - url);
1076         }
1077
1078         if (helper) {
1079                 transport_helper_init(ret, helper);
1080         } else if (starts_with(url, "rsync:")) {
1081                 die(_("git-over-rsync is no longer supported"));
1082         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1083                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1084                 transport_check_allowed("file");
1085                 ret->data = data;
1086                 ret->vtable = &bundle_vtable;
1087                 ret->smart_options = NULL;
1088         } else if (!is_url(url)
1089                 || starts_with(url, "file://")
1090                 || starts_with(url, "git://")
1091                 || starts_with(url, "ssh://")
1092                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1093                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1094                 ) {
1095                 /*
1096                  * These are builtin smart transports; "allowed" transports
1097                  * will be checked individually in git_connect.
1098                  */
1099                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1100                 ret->data = data;
1101                 ret->vtable = &builtin_smart_vtable;
1102                 ret->smart_options = &(data->options);
1103
1104                 data->conn = NULL;
1105                 data->got_remote_heads = 0;
1106         } else {
1107                 /* Unknown protocol in URL. Pass to external handler. */
1108                 int len = external_specification_len(url);
1109                 char *handler = xmemdupz(url, len);
1110                 transport_helper_init(ret, handler);
1111         }
1112
1113         if (ret->smart_options) {
1114                 ret->smart_options->thin = 1;
1115                 ret->smart_options->uploadpack = "git-upload-pack";
1116                 if (remote->uploadpack)
1117                         ret->smart_options->uploadpack = remote->uploadpack;
1118                 ret->smart_options->receivepack = "git-receive-pack";
1119                 if (remote->receivepack)
1120                         ret->smart_options->receivepack = remote->receivepack;
1121         }
1122
1123         ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1124
1125         return ret;
1126 }
1127
1128 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1129 {
1130         return transport->hash_algo;
1131 }
1132
1133 int transport_set_option(struct transport *transport,
1134                          const char *name, const char *value)
1135 {
1136         int git_reports = 1, protocol_reports = 1;
1137
1138         if (transport->smart_options)
1139                 git_reports = set_git_option(transport->smart_options,
1140                                              name, value);
1141
1142         if (transport->vtable->set_option)
1143                 protocol_reports = transport->vtable->set_option(transport,
1144                                                                  name, value);
1145
1146         /* If either report is 0, report 0 (success). */
1147         if (!git_reports || !protocol_reports)
1148                 return 0;
1149         /* If either reports -1 (invalid value), report -1. */
1150         if ((git_reports == -1) || (protocol_reports == -1))
1151                 return -1;
1152         /* Otherwise if both report unknown, report unknown. */
1153         return 1;
1154 }
1155
1156 void transport_set_verbosity(struct transport *transport, int verbosity,
1157         int force_progress)
1158 {
1159         if (verbosity >= 1)
1160                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1161         if (verbosity < 0)
1162                 transport->verbose = -1;
1163
1164         /**
1165          * Rules used to determine whether to report progress (processing aborts
1166          * when a rule is satisfied):
1167          *
1168          *   . Report progress, if force_progress is 1 (ie. --progress).
1169          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1170          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1171          *   . Report progress if isatty(2) is 1.
1172          **/
1173         if (force_progress >= 0)
1174                 transport->progress = !!force_progress;
1175         else
1176                 transport->progress = verbosity >= 0 && isatty(2);
1177 }
1178
1179 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1180 {
1181         int i;
1182
1183         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1184                         "not be found on any remote:\n"));
1185         for (i = 0; i < needs_pushing->nr; i++)
1186                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1187         fprintf(stderr, _("\nPlease try\n\n"
1188                           "     git push --recurse-submodules=on-demand\n\n"
1189                           "or cd to the path and use\n\n"
1190                           "     git push\n\n"
1191                           "to push them to a remote.\n\n"));
1192
1193         string_list_clear(needs_pushing, 0);
1194
1195         die(_("Aborting."));
1196 }
1197
1198 static int run_pre_push_hook(struct transport *transport,
1199                              struct ref *remote_refs)
1200 {
1201         int ret = 0, x;
1202         struct ref *r;
1203         struct child_process proc = CHILD_PROCESS_INIT;
1204         struct strbuf buf;
1205         const char *argv[4];
1206
1207         if (!(argv[0] = find_hook("pre-push")))
1208                 return 0;
1209
1210         argv[1] = transport->remote->name;
1211         argv[2] = transport->url;
1212         argv[3] = NULL;
1213
1214         proc.argv = argv;
1215         proc.in = -1;
1216         proc.trace2_hook_name = "pre-push";
1217
1218         if (start_command(&proc)) {
1219                 finish_command(&proc);
1220                 return -1;
1221         }
1222
1223         sigchain_push(SIGPIPE, SIG_IGN);
1224
1225         strbuf_init(&buf, 256);
1226
1227         for (r = remote_refs; r; r = r->next) {
1228                 if (!r->peer_ref) continue;
1229                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1230                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1231                 if (r->status == REF_STATUS_REJECT_REMOTE_UPDATED) continue;
1232                 if (r->status == REF_STATUS_UPTODATE) continue;
1233
1234                 strbuf_reset(&buf);
1235                 strbuf_addf( &buf, "%s %s %s %s\n",
1236                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1237                          r->name, oid_to_hex(&r->old_oid));
1238
1239                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1240                         /* We do not mind if a hook does not read all refs. */
1241                         if (errno != EPIPE)
1242                                 ret = -1;
1243                         break;
1244                 }
1245         }
1246
1247         strbuf_release(&buf);
1248
1249         x = close(proc.in);
1250         if (!ret)
1251                 ret = x;
1252
1253         sigchain_pop(SIGPIPE);
1254
1255         x = finish_command(&proc);
1256         if (!ret)
1257                 ret = x;
1258
1259         return ret;
1260 }
1261
1262 int transport_push(struct repository *r,
1263                    struct transport *transport,
1264                    struct refspec *rs, int flags,
1265                    unsigned int *reject_reasons)
1266 {
1267         *reject_reasons = 0;
1268
1269         if (transport_color_config() < 0)
1270                 return -1;
1271
1272         if (transport->vtable->push_refs) {
1273                 struct ref *remote_refs;
1274                 struct ref *local_refs = get_local_heads();
1275                 int match_flags = MATCH_REFS_NONE;
1276                 int verbose = (transport->verbose > 0);
1277                 int quiet = (transport->verbose < 0);
1278                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1279                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1280                 int push_ret, ret, err;
1281                 struct transport_ls_refs_options transport_options =
1282                         TRANSPORT_LS_REFS_OPTIONS_INIT;
1283
1284                 if (check_push_refs(local_refs, rs) < 0)
1285                         return -1;
1286
1287                 refspec_ref_prefixes(rs, &transport_options.ref_prefixes);
1288
1289                 trace2_region_enter("transport_push", "get_refs_list", r);
1290                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1291                                                                &transport_options);
1292                 trace2_region_leave("transport_push", "get_refs_list", r);
1293
1294                 strvec_clear(&transport_options.ref_prefixes);
1295
1296                 if (flags & TRANSPORT_PUSH_ALL)
1297                         match_flags |= MATCH_REFS_ALL;
1298                 if (flags & TRANSPORT_PUSH_MIRROR)
1299                         match_flags |= MATCH_REFS_MIRROR;
1300                 if (flags & TRANSPORT_PUSH_PRUNE)
1301                         match_flags |= MATCH_REFS_PRUNE;
1302                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1303                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1304
1305                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1306                         return -1;
1307
1308                 if (transport->smart_options &&
1309                     transport->smart_options->cas &&
1310                     !is_empty_cas(transport->smart_options->cas))
1311                         apply_push_cas(transport->smart_options->cas,
1312                                        transport->remote, remote_refs);
1313
1314                 set_ref_status_for_push(remote_refs,
1315                         flags & TRANSPORT_PUSH_MIRROR,
1316                         flags & TRANSPORT_PUSH_FORCE);
1317
1318                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1319                         if (run_pre_push_hook(transport, remote_refs))
1320                                 return -1;
1321
1322                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1323                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1324                     !is_bare_repository()) {
1325                         struct ref *ref = remote_refs;
1326                         struct oid_array commits = OID_ARRAY_INIT;
1327
1328                         trace2_region_enter("transport_push", "push_submodules", r);
1329                         for (; ref; ref = ref->next)
1330                                 if (!is_null_oid(&ref->new_oid))
1331                                         oid_array_append(&commits,
1332                                                           &ref->new_oid);
1333
1334                         if (!push_unpushed_submodules(r,
1335                                                       &commits,
1336                                                       transport->remote,
1337                                                       rs,
1338                                                       transport->push_options,
1339                                                       pretend)) {
1340                                 oid_array_clear(&commits);
1341                                 trace2_region_leave("transport_push", "push_submodules", r);
1342                                 die(_("failed to push all needed submodules"));
1343                         }
1344                         oid_array_clear(&commits);
1345                         trace2_region_leave("transport_push", "push_submodules", r);
1346                 }
1347
1348                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1349                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1350                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1351                       !pretend)) && !is_bare_repository()) {
1352                         struct ref *ref = remote_refs;
1353                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1354                         struct oid_array commits = OID_ARRAY_INIT;
1355
1356                         trace2_region_enter("transport_push", "check_submodules", r);
1357                         for (; ref; ref = ref->next)
1358                                 if (!is_null_oid(&ref->new_oid))
1359                                         oid_array_append(&commits,
1360                                                           &ref->new_oid);
1361
1362                         if (find_unpushed_submodules(r,
1363                                                      &commits,
1364                                                      transport->remote->name,
1365                                                      &needs_pushing)) {
1366                                 oid_array_clear(&commits);
1367                                 trace2_region_leave("transport_push", "check_submodules", r);
1368                                 die_with_unpushed_submodules(&needs_pushing);
1369                         }
1370                         string_list_clear(&needs_pushing, 0);
1371                         oid_array_clear(&commits);
1372                         trace2_region_leave("transport_push", "check_submodules", r);
1373                 }
1374
1375                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1376                         trace2_region_enter("transport_push", "push_refs", r);
1377                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1378                         trace2_region_leave("transport_push", "push_refs", r);
1379                 } else
1380                         push_ret = 0;
1381                 err = push_had_errors(remote_refs);
1382                 ret = push_ret | err;
1383
1384                 if (!quiet || err)
1385                         transport_print_push_status(transport->url, remote_refs,
1386                                         verbose | porcelain, porcelain,
1387                                         reject_reasons);
1388
1389                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1390                         set_upstreams(transport, remote_refs, pretend);
1391
1392                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1393                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1394                         struct ref *ref;
1395                         for (ref = remote_refs; ref; ref = ref->next)
1396                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1397                 }
1398
1399                 if (porcelain && !push_ret)
1400                         puts("Done");
1401                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1402                         fprintf(stderr, "Everything up-to-date\n");
1403
1404                 return ret;
1405         }
1406         return 1;
1407 }
1408
1409 const struct ref *transport_get_remote_refs(struct transport *transport,
1410                                             struct transport_ls_refs_options *transport_options)
1411 {
1412         if (!transport->got_remote_refs) {
1413                 transport->remote_refs =
1414                         transport->vtable->get_refs_list(transport, 0,
1415                                                          transport_options);
1416                 transport->got_remote_refs = 1;
1417         }
1418
1419         return transport->remote_refs;
1420 }
1421
1422 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1423 {
1424         int rc;
1425         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1426         struct ref **heads = NULL;
1427         struct ref *rm;
1428
1429         for (rm = refs; rm; rm = rm->next) {
1430                 nr_refs++;
1431                 if (rm->peer_ref &&
1432                     !is_null_oid(&rm->old_oid) &&
1433                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1434                         continue;
1435                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1436                 heads[nr_heads++] = rm;
1437         }
1438
1439         if (!nr_heads) {
1440                 /*
1441                  * When deepening of a shallow repository is requested,
1442                  * then local and remote refs are likely to still be equal.
1443                  * Just feed them all to the fetch method in that case.
1444                  * This condition shouldn't be met in a non-deepening fetch
1445                  * (see builtin/fetch.c:quickfetch()).
1446                  */
1447                 ALLOC_ARRAY(heads, nr_refs);
1448                 for (rm = refs; rm; rm = rm->next)
1449                         heads[nr_heads++] = rm;
1450         }
1451
1452         rc = transport->vtable->fetch(transport, nr_heads, heads);
1453
1454         free(heads);
1455         return rc;
1456 }
1457
1458 void transport_unlock_pack(struct transport *transport)
1459 {
1460         int i;
1461
1462         for (i = 0; i < transport->pack_lockfiles.nr; i++)
1463                 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1464         string_list_clear(&transport->pack_lockfiles, 0);
1465 }
1466
1467 int transport_connect(struct transport *transport, const char *name,
1468                       const char *exec, int fd[2])
1469 {
1470         if (transport->vtable->connect)
1471                 return transport->vtable->connect(transport, name, exec, fd);
1472         else
1473                 die(_("operation not supported by protocol"));
1474 }
1475
1476 int transport_disconnect(struct transport *transport)
1477 {
1478         int ret = 0;
1479         if (transport->vtable->disconnect)
1480                 ret = transport->vtable->disconnect(transport);
1481         if (transport->got_remote_refs)
1482                 free_refs((void *)transport->remote_refs);
1483         free(transport);
1484         return ret;
1485 }
1486
1487 /*
1488  * Strip username (and password) from a URL and return
1489  * it in a newly allocated string.
1490  */
1491 char *transport_anonymize_url(const char *url)
1492 {
1493         char *scheme_prefix, *anon_part;
1494         size_t anon_len, prefix_len = 0;
1495
1496         anon_part = strchr(url, '@');
1497         if (url_is_local_not_ssh(url) || !anon_part)
1498                 goto literal_copy;
1499
1500         anon_len = strlen(++anon_part);
1501         scheme_prefix = strstr(url, "://");
1502         if (!scheme_prefix) {
1503                 if (!strchr(anon_part, ':'))
1504                         /* cannot be "me@there:/path/name" */
1505                         goto literal_copy;
1506         } else {
1507                 const char *cp;
1508                 /* make sure scheme is reasonable */
1509                 for (cp = url; cp < scheme_prefix; cp++) {
1510                         switch (*cp) {
1511                                 /* RFC 1738 2.1 */
1512                         case '+': case '.': case '-':
1513                                 break; /* ok */
1514                         default:
1515                                 if (isalnum(*cp))
1516                                         break;
1517                                 /* it isn't */
1518                                 goto literal_copy;
1519                         }
1520                 }
1521                 /* @ past the first slash does not count */
1522                 cp = strchr(scheme_prefix + 3, '/');
1523                 if (cp && cp < anon_part)
1524                         goto literal_copy;
1525                 prefix_len = scheme_prefix - url + 3;
1526         }
1527         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1528                        (int)anon_len, anon_part);
1529 literal_copy:
1530         return xstrdup(url);
1531 }