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 string_list_item *e = data->header.references.items + i;
 151                 const char *name = e->string;
 152                 struct ref *ref = alloc_ref(name);
 153                 struct object_id *oid = e->util;
 154                 oidcpy(&ref->old_oid, oid);
 155                 ref->next = result;
 156                 result = ref;
 157         }
 158         return result;
 159 }
 160
 161 static int fetch_refs_from_bundle(struct transport *transport,
 162                                int nr_heads, struct ref **to_fetch)
 163 {
 164         struct bundle_transport_data *data = transport->data;
 165         int ret;
 166
 167         if (!data->get_refs_from_bundle_called)
 168                 get_refs_from_bundle(transport, 0, NULL);
 169         ret = unbundle(the_repository, &data->header, data->fd,
 170                            transport->progress ? BUNDLE_VERBOSE : 0);
 171         transport->hash_algo = data->header.hash_algo;
 172         return ret;
 173 }
 174
 175 static int close_bundle(struct transport *transport)
 176 {
 177         struct bundle_transport_data *data = transport->data;
 178         if (data->fd > 0)
 179                 close(data->fd);
 180         bundle_header_release(&data->header);
 181         free(data);
 182         return 0;
 183 }
 184
 185 struct git_transport_data {
 186         struct git_transport_options options;
 187         struct child_process *conn;
 188         int fd[2];
 189         unsigned got_remote_heads : 1;
 190         enum protocol_version version;
 191         struct oid_array extra_have;
 192         struct oid_array shallow;
 193 };
 194
 195 static int set_git_option(struct git_transport_options *opts,
 196                           const char *name, const char *value)
 197 {
 198         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 199                 opts->uploadpack = value;
 200                 return 0;
 201         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 202                 opts->receivepack = value;
 203                 return 0;
 204         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 205                 opts->thin = !!value;
 206                 return 0;
 207         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 208                 opts->followtags = !!value;
 209                 return 0;
 210         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 211                 opts->keep = !!value;
 212                 return 0;
 213         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 214                 opts->update_shallow = !!value;
 215                 return 0;
 216         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 217                 if (!value)
 218                         opts->depth = 0;
 219                 else {
 220                         char *end;
 221                         opts->depth = strtol(value, &end, 0);
 222                         if (*end)
 223                                 die(_("transport: invalid depth option '%s'"), value);
 224                 }
 225                 return 0;
 226         } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 227                 opts->deepen_since = value;
 228                 return 0;
 229         } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 230                 opts->deepen_not = (const struct string_list *)value;
 231                 return 0;
 232         } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 233                 opts->deepen_relative = !!value;
 234                 return 0;
 235         } else if (!strcmp(name, TRANS_OPT_FROM_PROMISOR)) {
 236                 opts->from_promisor = !!value;
 237                 return 0;
 238         } else if (!strcmp(name, TRANS_OPT_LIST_OBJECTS_FILTER)) {
 239                 list_objects_filter_die_if_populated(&opts->filter_options);
 240                 parse_list_objects_filter(&opts->filter_options, value);
 241                 return 0;
 242         } else if (!strcmp(name, TRANS_OPT_REJECT_SHALLOW)) {
 243                 opts->reject_shallow = !!value;
 244                 return 0;
 245         }
 246         return 1;
 247 }
 248
 249 static int connect_setup(struct transport *transport, int for_push)
 250 {
 251         struct git_transport_data *data = transport->data;
 252         int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 253
 254         if (data->conn)
 255                 return 0;
 256
 257         switch (transport->family) {
 258         case TRANSPORT_FAMILY_ALL: break;
 259         case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 260         case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 261         }
 262
 263         data->conn = git_connect(data->fd, transport->url,
 264                                  for_push ? data->options.receivepack :
 265                                  data->options.uploadpack,
 266                                  flags);
 267
 268         return 0;
 269 }
 270
 271 static void die_if_server_options(struct transport *transport)
 272 {
 273         if (!transport->server_options || !transport->server_options->nr)
 274                 return;
 275         advise(_("see protocol.version in 'git help config' for more details"));
 276         die(_("server options require protocol version 2 or later"));
 277 }
 278
 279 /*
 280  * Obtains the protocol version from the transport and writes it to
 281  * transport->data->version, first connecting if not already connected.
 282  *
 283  * If the protocol version is one that allows skipping the listing of remote
 284  * refs, and must_list_refs is 0, the listing of remote refs is skipped and
 285  * this function returns NULL. Otherwise, this function returns the list of
 286  * remote refs.
 287  */
 288 static struct ref *handshake(struct transport *transport, int for_push,
 289                              struct transport_ls_refs_options *options,
 290                              int must_list_refs)
 291 {
 292         struct git_transport_data *data = transport->data;
 293         struct ref *refs = NULL;
 294         struct packet_reader reader;
 295         int sid_len;
 296         const char *server_sid;
 297
 298         connect_setup(transport, for_push);
 299
 300         packet_reader_init(&reader, data->fd[0], NULL, 0,
 301                            PACKET_READ_CHOMP_NEWLINE |
 302                            PACKET_READ_GENTLE_ON_EOF |
 303                            PACKET_READ_DIE_ON_ERR_PACKET);
 304
 305         data->version = discover_version(&reader);
 306         switch (data->version) {
 307         case protocol_v2:
 308                 if (server_feature_v2("session-id", &server_sid))
 309                         trace2_data_string("transfer", NULL, "server-sid", server_sid);
 310                 if (must_list_refs)
 311                         get_remote_refs(data->fd[1], &reader, &refs, for_push,
 312                                         options,
 313                                         transport->server_options,
 314                                         transport->stateless_rpc);
 315                 break;
 316         case protocol_v1:
 317         case protocol_v0:
 318                 die_if_server_options(transport);
 319                 get_remote_heads(&reader, &refs,
 320                                  for_push ? REF_NORMAL : 0,
 321                                  &data->extra_have,
 322                                  &data->shallow);
 323                 server_sid = server_feature_value("session-id", &sid_len);
 324                 if (server_sid) {
 325                         char *sid = xstrndup(server_sid, sid_len);
 326                         trace2_data_string("transfer", NULL, "server-sid", sid);
 327                         free(sid);
 328                 }
 329                 break;
 330         case protocol_unknown_version:
 331                 BUG("unknown protocol version");
 332         }
 333         data->got_remote_heads = 1;
 334         transport->hash_algo = reader.hash_algo;
 335
 336         if (reader.line_peeked)
 337                 BUG("buffer must be empty at the end of handshake()");
 338
 339         return refs;
 340 }
 341
 342 static struct ref *get_refs_via_connect(struct transport *transport, int for_push,
 343                                         struct transport_ls_refs_options *options)
 344 {
 345         return handshake(transport, for_push, options, 1);
 346 }
 347
 348 static int fetch_refs_via_pack(struct transport *transport,
 349                                int nr_heads, struct ref **to_fetch)
 350 {
 351         int ret = 0;
 352         struct git_transport_data *data = transport->data;
 353         struct ref *refs = NULL;
 354         struct fetch_pack_args args;
 355         struct ref *refs_tmp = NULL;
 356
 357         memset(&args, 0, sizeof(args));
 358         args.uploadpack = data->options.uploadpack;
 359         args.keep_pack = data->options.keep;
 360         args.lock_pack = 1;
 361         args.use_thin_pack = data->options.thin;
 362         args.include_tag = data->options.followtags;
 363         args.verbose = (transport->verbose > 1);
 364         args.quiet = (transport->verbose < 0);
 365         args.no_progress = !transport->progress;
 366         args.depth = data->options.depth;
 367         args.deepen_since = data->options.deepen_since;
 368         args.deepen_not = data->options.deepen_not;
 369         args.deepen_relative = data->options.deepen_relative;
 370         args.check_self_contained_and_connected =
 371                 data->options.check_self_contained_and_connected;
 372         args.cloning = transport->cloning;
 373         args.update_shallow = data->options.update_shallow;
 374         args.from_promisor = data->options.from_promisor;
 375         args.filter_options = data->options.filter_options;
 376         args.stateless_rpc = transport->stateless_rpc;
 377         args.server_options = transport->server_options;
 378         args.negotiation_tips = data->options.negotiation_tips;
 379         args.reject_shallow_remote = transport->smart_options->reject_shallow;
 380
 381         if (!data->got_remote_heads) {
 382                 int i;
 383                 int must_list_refs = 0;
 384                 for (i = 0; i < nr_heads; i++) {
 385                         if (!to_fetch[i]->exact_oid) {
 386                                 must_list_refs = 1;
 387                                 break;
 388                         }
 389                 }
 390                 refs_tmp = handshake(transport, 0, NULL, must_list_refs);
 391         }
 392
 393         if (data->version == protocol_unknown_version)
 394                 BUG("unknown protocol version");
 395         else if (data->version <= protocol_v1)
 396                 die_if_server_options(transport);
 397
 398         if (data->options.acked_commits) {
 399                 if (data->version < protocol_v2) {
 400                         warning(_("--negotiate-only requires protocol v2"));
 401                         ret = -1;
 402                 } else if (!server_supports_feature("fetch", "wait-for-done", 0)) {
 403                         warning(_("server does not support wait-for-done"));
 404                         ret = -1;
 405                 } else {
 406                         negotiate_using_fetch(data->options.negotiation_tips,
 407                                               transport->server_options,
 408                                               transport->stateless_rpc,
 409                                               data->fd,
 410                                               data->options.acked_commits);
 411                         ret = 0;
 412                 }
 413                 goto cleanup;
 414         }
 415
 416         refs = fetch_pack(&args, data->fd,
 417                           refs_tmp ? refs_tmp : transport->remote_refs,
 418                           to_fetch, nr_heads, &data->shallow,
 419                           &transport->pack_lockfiles, data->version);
 420
 421         data->got_remote_heads = 0;
 422         data->options.self_contained_and_connected =
 423                 args.self_contained_and_connected;
 424         data->options.connectivity_checked = args.connectivity_checked;
 425
 426         if (refs == NULL)
 427                 ret = -1;
 428         if (report_unmatched_refs(to_fetch, nr_heads))
 429                 ret = -1;
 430
 431 cleanup:
 432         close(data->fd[0]);
 433         if (data->fd[1] >= 0)
 434                 close(data->fd[1]);
 435         if (finish_connect(data->conn))
 436                 ret = -1;
 437         data->conn = NULL;
 438
 439         free_refs(refs_tmp);
 440         free_refs(refs);
 441         return ret;
 442 }
 443
 444 static int push_had_errors(struct ref *ref)
 445 {
 446         for (; ref; ref = ref->next) {
 447                 switch (ref->status) {
 448                 case REF_STATUS_NONE:
 449                 case REF_STATUS_UPTODATE:
 450                 case REF_STATUS_OK:
 451                         break;
 452                 default:
 453                         return 1;
 454                 }
 455         }
 456         return 0;
 457 }
 458
 459 int transport_refs_pushed(struct ref *ref)
 460 {
 461         for (; ref; ref = ref->next) {
 462                 switch(ref->status) {
 463                 case REF_STATUS_NONE:
 464                 case REF_STATUS_UPTODATE:
 465                         break;
 466                 default:
 467                         return 1;
 468                 }
 469         }
 470         return 0;
 471 }
 472
 473 static void update_one_tracking_ref(struct remote *remote, char *refname,
 474                                     struct object_id *new_oid, int deletion,
 475                                     int verbose)
 476 {
 477         struct refspec_item rs;
 478
 479         memset(&rs, 0, sizeof(rs));
 480         rs.src = refname;
 481         rs.dst = NULL;
 482
 483         if (!remote_find_tracking(remote, &rs)) {
 484                 if (verbose)
 485                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 486                 if (deletion)
 487                         delete_ref(NULL, rs.dst, NULL, 0);
 488                 else
 489                         update_ref("update by push", rs.dst, new_oid,
 490                                    NULL, 0, 0);
 491                 free(rs.dst);
 492         }
 493 }
 494
 495 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 496 {
 497         char *refname;
 498         struct object_id *new_oid;
 499         struct ref_push_report *report;
 500
 501         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 502                 return;
 503
 504         report = ref->report;
 505         if (!report)
 506                 update_one_tracking_ref(remote, ref->name, &ref->new_oid,
 507                                         ref->deletion, verbose);
 508         else
 509                 for (; report; report = report->next) {
 510                         refname = report->ref_name ? (char *)report->ref_name : ref->name;
 511                         new_oid = report->new_oid ? report->new_oid : &ref->new_oid;
 512                         update_one_tracking_ref(remote, refname, new_oid,
 513                                                 is_null_oid(new_oid), verbose);
 514                 }
 515 }
 516
 517 static void print_ref_status(char flag, const char *summary,
 518                              struct ref *to, struct ref *from, const char *msg,
 519                              struct ref_push_report *report,
 520                              int porcelain, int summary_width)
 521 {
 522         const char *to_name;
 523
 524         if (report && report->ref_name)
 525                 to_name = report->ref_name;
 526         else
 527                 to_name = to->name;
 528
 529         if (porcelain) {
 530                 if (from)
 531                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to_name);
 532                 else
 533                         fprintf(stdout, "%c\t:%s\t", flag, to_name);
 534                 if (msg)
 535                         fprintf(stdout, "%s (%s)\n", summary, msg);
 536                 else
 537                         fprintf(stdout, "%s\n", summary);
 538         } else {
 539                 const char *red = "", *reset = "";
 540                 if (push_had_errors(to)) {
 541                         red = transport_get_color(TRANSPORT_COLOR_REJECTED);
 542                         reset = transport_get_color(TRANSPORT_COLOR_RESET);
 543                 }
 544                 fprintf(stderr, " %s%c %-*s%s ", red, flag, summary_width,
 545                         summary, reset);
 546                 if (from)
 547                         fprintf(stderr, "%s -> %s",
 548                                 prettify_refname(from->name),
 549                                 prettify_refname(to_name));
 550                 else
 551                         fputs(prettify_refname(to_name), stderr);
 552                 if (msg) {
 553                         fputs(" (", stderr);
 554                         fputs(msg, stderr);
 555                         fputc(')', stderr);
 556                 }
 557                 fputc('\n', stderr);
 558         }
 559 }
 560
 561 static void print_ok_ref_status(struct ref *ref,
 562                                 struct ref_push_report *report,
 563                                 int porcelain, int summary_width)
 564 {
 565         struct object_id *old_oid;
 566         struct object_id *new_oid;
 567         const char *ref_name;
 568         int forced_update;
 569
 570         if (report && report->old_oid)
 571                 old_oid = report->old_oid;
 572         else
 573                 old_oid = &ref->old_oid;
 574         if (report && report->new_oid)
 575                 new_oid = report->new_oid;
 576         else
 577                 new_oid = &ref->new_oid;
 578         if (report && report->forced_update)
 579                 forced_update = report->forced_update;
 580         else
 581                 forced_update = ref->forced_update;
 582         if (report && report->ref_name)
 583                 ref_name = report->ref_name;
 584         else
 585                 ref_name = ref->name;
 586
 587         if (ref->deletion)
 588                 print_ref_status('-', "[deleted]", ref, NULL, NULL,
 589                                  report, porcelain, summary_width);
 590         else if (is_null_oid(old_oid))
 591                 print_ref_status('*',
 592                                  (starts_with(ref_name, "refs/tags/")
 593                                   ? "[new tag]"
 594                                   : (starts_with(ref_name, "refs/heads/")
 595                                      ? "[new branch]"
 596                                      : "[new reference]")),
 597                                  ref, ref->peer_ref, NULL,
 598                                  report, porcelain, summary_width);
 599         else {
 600                 struct strbuf quickref = STRBUF_INIT;
 601                 char type;
 602                 const char *msg;
 603
 604                 strbuf_add_unique_abbrev(&quickref, old_oid,
 605                                          DEFAULT_ABBREV);
 606                 if (forced_update) {
 607                         strbuf_addstr(&quickref, "...");
 608                         type = '+';
 609                         msg = "forced update";
 610                 } else {
 611                         strbuf_addstr(&quickref, "..");
 612                         type = ' ';
 613                         msg = NULL;
 614                 }
 615                 strbuf_add_unique_abbrev(&quickref, new_oid,
 616                                          DEFAULT_ABBREV);
 617
 618                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg,
 619                                  report, porcelain, summary_width);
 620                 strbuf_release(&quickref);
 621         }
 622 }
 623
 624 static int print_one_push_report(struct ref *ref, const char *dest, int count,
 625                                  struct ref_push_report *report,
 626                                  int porcelain, int summary_width)
 627 {
 628         if (!count) {
 629                 char *url = transport_anonymize_url(dest);
 630                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 631                 free(url);
 632         }
 633
 634         switch(ref->status) {
 635         case REF_STATUS_NONE:
 636                 print_ref_status('X', "[no match]", ref, NULL, NULL,
 637                                  report, porcelain, summary_width);
 638                 break;
 639         case REF_STATUS_REJECT_NODELETE:
 640                 print_ref_status('!', "[rejected]", ref, NULL,
 641                                  "remote does not support deleting refs",
 642                                  report, porcelain, summary_width);
 643                 break;
 644         case REF_STATUS_UPTODATE:
 645                 print_ref_status('=', "[up to date]", ref,
 646                                  ref->peer_ref, NULL,
 647                                  report, porcelain, summary_width);
 648                 break;
 649         case REF_STATUS_REJECT_NONFASTFORWARD:
 650                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 651                                  "non-fast-forward",
 652                                  report, porcelain, summary_width);
 653                 break;
 654         case REF_STATUS_REJECT_ALREADY_EXISTS:
 655                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 656                                  "already exists",
 657                                  report, porcelain, summary_width);
 658                 break;
 659         case REF_STATUS_REJECT_FETCH_FIRST:
 660                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 661                                  "fetch first",
 662                                  report, porcelain, summary_width);
 663                 break;
 664         case REF_STATUS_REJECT_NEEDS_FORCE:
 665                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 666                                  "needs force",
 667                                  report, porcelain, summary_width);
 668                 break;
 669         case REF_STATUS_REJECT_STALE:
 670                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 671                                  "stale info",
 672                                  report, porcelain, summary_width);
 673                 break;
 674         case REF_STATUS_REJECT_REMOTE_UPDATED:
 675                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 676                                  "remote ref updated since checkout",
 677                                  report, porcelain, summary_width);
 678                 break;
 679         case REF_STATUS_REJECT_SHALLOW:
 680                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 681                                  "new shallow roots not allowed",
 682                                  report, porcelain, summary_width);
 683                 break;
 684         case REF_STATUS_REMOTE_REJECT:
 685                 print_ref_status('!', "[remote rejected]", ref,
 686                                  ref->deletion ? NULL : ref->peer_ref,
 687                                  ref->remote_status,
 688                                  report, porcelain, summary_width);
 689                 break;
 690         case REF_STATUS_EXPECTING_REPORT:
 691                 print_ref_status('!', "[remote failure]", ref,
 692                                  ref->deletion ? NULL : ref->peer_ref,
 693                                  "remote failed to report status",
 694                                  report, porcelain, summary_width);
 695                 break;
 696         case REF_STATUS_ATOMIC_PUSH_FAILED:
 697                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 698                                  "atomic push failed",
 699                                  report, porcelain, summary_width);
 700                 break;
 701         case REF_STATUS_OK:
 702                 print_ok_ref_status(ref, report, porcelain, summary_width);
 703                 break;
 704         }
 705
 706         return 1;
 707 }
 708
 709 static int print_one_push_status(struct ref *ref, const char *dest, int count,
 710                                  int porcelain, int summary_width)
 711 {
 712         struct ref_push_report *report;
 713         int n = 0;
 714
 715         if (!ref->report)
 716                 return print_one_push_report(ref, dest, count,
 717                                              NULL, porcelain, summary_width);
 718
 719         for (report = ref->report; report; report = report->next)
 720                 print_one_push_report(ref, dest, count + n++,
 721                                       report, porcelain, summary_width);
 722         return n;
 723 }
 724
 725 static int measure_abbrev(const struct object_id *oid, int sofar)
 726 {
 727         char hex[GIT_MAX_HEXSZ + 1];
 728         int w = find_unique_abbrev_r(hex, oid, DEFAULT_ABBREV);
 729
 730         return (w < sofar) ? sofar : w;
 731 }
 732
 733 int transport_summary_width(const struct ref *refs)
 734 {
 735         int maxw = -1;
 736
 737         for (; refs; refs = refs->next) {
 738                 maxw = measure_abbrev(&refs->old_oid, maxw);
 739                 maxw = measure_abbrev(&refs->new_oid, maxw);
 740         }
 741         if (maxw < 0)
 742                 maxw = FALLBACK_DEFAULT_ABBREV;
 743         return (2 * maxw + 3);
 744 }
 745
 746 void transport_print_push_status(const char *dest, struct ref *refs,
 747                                   int verbose, int porcelain, unsigned int *reject_reasons)
 748 {
 749         struct ref *ref;
 750         int n = 0;
 751         char *head;
 752         int summary_width = transport_summary_width(refs);
 753
 754         if (transport_color_config() < 0)
 755                 warning(_("could not parse transport.color.* config"));
 756
 757         head = resolve_refdup("HEAD", RESOLVE_REF_READING, NULL, NULL);
 758
 759         if (verbose) {
 760                 for (ref = refs; ref; ref = ref->next)
 761                         if (ref->status == REF_STATUS_UPTODATE)
 762                                 n += print_one_push_status(ref, dest, n,
 763                                                            porcelain, summary_width);
 764         }
 765
 766         for (ref = refs; ref; ref = ref->next)
 767                 if (ref->status == REF_STATUS_OK)
 768                         n += print_one_push_status(ref, dest, n,
 769                                                    porcelain, summary_width);
 770
 771         *reject_reasons = 0;
 772         for (ref = refs; ref; ref = ref->next) {
 773                 if (ref->status != REF_STATUS_NONE &&
 774                     ref->status != REF_STATUS_UPTODATE &&
 775                     ref->status != REF_STATUS_OK)
 776                         n += print_one_push_status(ref, dest, n,
 777                                                    porcelain, summary_width);
 778                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 779                         if (head != NULL && !strcmp(head, ref->name))
 780                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 781                         else
 782                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 783                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 784                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 785                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 786                         *reject_reasons |= REJECT_FETCH_FIRST;
 787                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 788                         *reject_reasons |= REJECT_NEEDS_FORCE;
 789                 } else if (ref->status == REF_STATUS_REJECT_REMOTE_UPDATED) {
 790                         *reject_reasons |= REJECT_REF_NEEDS_UPDATE;
 791                 }
 792         }
 793         free(head);
 794 }
 795
 796 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 797 {
 798         struct git_transport_data *data = transport->data;
 799         struct send_pack_args args;
 800         int ret = 0;
 801
 802         if (transport_color_config() < 0)
 803                 return -1;
 804
 805         if (!data->got_remote_heads)
 806                 get_refs_via_connect(transport, 1, NULL);
 807
 808         memset(&args, 0, sizeof(args));
 809         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 810         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 811         args.use_thin_pack = data->options.thin;
 812         args.verbose = (transport->verbose > 0);
 813         args.quiet = (transport->verbose < 0);
 814         args.progress = transport->progress;
 815         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 816         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 817         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 818         args.push_options = transport->push_options;
 819         args.url = transport->url;
 820
 821         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 822                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 823         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 824                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 825         else
 826                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 827
 828         switch (data->version) {
 829         case protocol_v2:
 830                 die(_("support for protocol v2 not implemented yet"));
 831                 break;
 832         case protocol_v1:
 833         case protocol_v0:
 834                 ret = send_pack(&args, data->fd, data->conn, remote_refs,
 835                                 &data->extra_have);
 836                 break;
 837         case protocol_unknown_version:
 838                 BUG("unknown protocol version");
 839         }
 840
 841         close(data->fd[1]);
 842         close(data->fd[0]);
 843         /*
 844          * Atomic push may abort the connection early and close the pipe,
 845          * which may cause an error for `finish_connect()`. Ignore this error
 846          * for atomic git-push.
 847          */
 848         if (ret || args.atomic)
 849                 finish_connect(data->conn);
 850         else
 851                 ret = finish_connect(data->conn);
 852         data->conn = NULL;
 853         data->got_remote_heads = 0;
 854
 855         return ret;
 856 }
 857
 858 static int connect_git(struct transport *transport, const char *name,
 859                        const char *executable, int fd[2])
 860 {
 861         struct git_transport_data *data = transport->data;
 862         data->conn = git_connect(data->fd, transport->url,
 863                                  executable, 0);
 864         fd[0] = data->fd[0];
 865         fd[1] = data->fd[1];
 866         return 0;
 867 }
 868
 869 static int disconnect_git(struct transport *transport)
 870 {
 871         struct git_transport_data *data = transport->data;
 872         if (data->conn) {
 873                 if (data->got_remote_heads && !transport->stateless_rpc)
 874                         packet_flush(data->fd[1]);
 875                 close(data->fd[0]);
 876                 if (data->fd[1] >= 0)
 877                         close(data->fd[1]);
 878                 finish_connect(data->conn);
 879         }
 880
 881         free(data);
 882         return 0;
 883 }
 884
 885 static struct transport_vtable taken_over_vtable = {
 886         NULL,
 887         get_refs_via_connect,
 888         fetch_refs_via_pack,
 889         git_transport_push,
 890         NULL,
 891         disconnect_git
 892 };
 893
 894 void transport_take_over(struct transport *transport,
 895                          struct child_process *child)
 896 {
 897         struct git_transport_data *data;
 898
 899         if (!transport->smart_options)
 900                 BUG("taking over transport requires non-NULL "
 901                     "smart_options field.");
 902
 903         CALLOC_ARRAY(data, 1);
 904         data->options = *transport->smart_options;
 905         data->conn = child;
 906         data->fd[0] = data->conn->out;
 907         data->fd[1] = data->conn->in;
 908         data->got_remote_heads = 0;
 909         transport->data = data;
 910
 911         transport->vtable = &taken_over_vtable;
 912         transport->smart_options = &(data->options);
 913
 914         transport->cannot_reuse = 1;
 915 }
 916
 917 static int is_file(const char *url)
 918 {
 919         struct stat buf;
 920         if (stat(url, &buf))
 921                 return 0;
 922         return S_ISREG(buf.st_mode);
 923 }
 924
 925 static int external_specification_len(const char *url)
 926 {
 927         return strchr(url, ':') - url;
 928 }
 929
 930 static const struct string_list *protocol_whitelist(void)
 931 {
 932         static int enabled = -1;
 933         static struct string_list allowed = STRING_LIST_INIT_DUP;
 934
 935         if (enabled < 0) {
 936                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 937                 if (v) {
 938                         string_list_split(&allowed, v, ':', -1);
 939                         string_list_sort(&allowed);
 940                         enabled = 1;
 941                 } else {
 942                         enabled = 0;
 943                 }
 944         }
 945
 946         return enabled ? &allowed : NULL;
 947 }
 948
 949 enum protocol_allow_config {
 950         PROTOCOL_ALLOW_NEVER = 0,
 951         PROTOCOL_ALLOW_USER_ONLY,
 952         PROTOCOL_ALLOW_ALWAYS
 953 };
 954
 955 static enum protocol_allow_config parse_protocol_config(const char *key,
 956                                                         const char *value)
 957 {
 958         if (!strcasecmp(value, "always"))
 959                 return PROTOCOL_ALLOW_ALWAYS;
 960         else if (!strcasecmp(value, "never"))
 961                 return PROTOCOL_ALLOW_NEVER;
 962         else if (!strcasecmp(value, "user"))
 963                 return PROTOCOL_ALLOW_USER_ONLY;
 964
 965         die(_("unknown value for config '%s': %s"), key, value);
 966 }
 967
 968 static enum protocol_allow_config get_protocol_config(const char *type)
 969 {
 970         char *key = xstrfmt("protocol.%s.allow", type);
 971         char *value;
 972
 973         /* first check the per-protocol config */
 974         if (!git_config_get_string(key, &value)) {
 975                 enum protocol_allow_config ret =
 976                         parse_protocol_config(key, value);
 977                 free(key);
 978                 free(value);
 979                 return ret;
 980         }
 981         free(key);
 982
 983         /* if defined, fallback to user-defined default for unknown protocols */
 984         if (!git_config_get_string("protocol.allow", &value)) {
 985                 enum protocol_allow_config ret =
 986                         parse_protocol_config("protocol.allow", value);
 987                 free(value);
 988                 return ret;
 989         }
 990
 991         /* fallback to built-in defaults */
 992         /* known safe */
 993         if (!strcmp(type, "http") ||
 994             !strcmp(type, "https") ||
 995             !strcmp(type, "git") ||
 996             !strcmp(type, "ssh") ||
 997             !strcmp(type, "file"))
 998                 return PROTOCOL_ALLOW_ALWAYS;
 999
1000         /* known scary; err on the side of caution */
1001         if (!strcmp(type, "ext"))
1002                 return PROTOCOL_ALLOW_NEVER;
1003
1004         /* unknown; by default let them be used only directly by the user */
1005         return PROTOCOL_ALLOW_USER_ONLY;
1006 }
1007
1008 int is_transport_allowed(const char *type, int from_user)
1009 {
1010         const struct string_list *whitelist = protocol_whitelist();
1011         if (whitelist)
1012                 return string_list_has_string(whitelist, type);
1013
1014         switch (get_protocol_config(type)) {
1015         case PROTOCOL_ALLOW_ALWAYS:
1016                 return 1;
1017         case PROTOCOL_ALLOW_NEVER:
1018                 return 0;
1019         case PROTOCOL_ALLOW_USER_ONLY:
1020                 if (from_user < 0)
1021                         from_user = git_env_bool("GIT_PROTOCOL_FROM_USER", 1);
1022                 return from_user;
1023         }
1024
1025         BUG("invalid protocol_allow_config type");
1026 }
1027
1028 void transport_check_allowed(const char *type)
1029 {
1030         if (!is_transport_allowed(type, -1))
1031                 die(_("transport '%s' not allowed"), type);
1032 }
1033
1034 static struct transport_vtable bundle_vtable = {
1035         NULL,
1036         get_refs_from_bundle,
1037         fetch_refs_from_bundle,
1038         NULL,
1039         NULL,
1040         close_bundle
1041 };
1042
1043 static struct transport_vtable builtin_smart_vtable = {
1044         NULL,
1045         get_refs_via_connect,
1046         fetch_refs_via_pack,
1047         git_transport_push,
1048         connect_git,
1049         disconnect_git
1050 };
1051
1052 struct transport *transport_get(struct remote *remote, const char *url)
1053 {
1054         const char *helper;
1055         struct transport *ret = xcalloc(1, sizeof(*ret));
1056
1057         ret->progress = isatty(2);
1058         string_list_init_dup(&ret->pack_lockfiles);
1059
1060         if (!remote)
1061                 BUG("No remote provided to transport_get()");
1062
1063         ret->got_remote_refs = 0;
1064         ret->remote = remote;
1065         helper = remote->foreign_vcs;
1066
1067         if (!url && remote->url)
1068                 url = remote->url[0];
1069         ret->url = url;
1070
1071         /* maybe it is a foreign URL? */
1072         if (url) {
1073                 const char *p = url;
1074
1075                 while (is_urlschemechar(p == url, *p))
1076                         p++;
1077                 if (starts_with(p, "::"))
1078                         helper = xstrndup(url, p - url);
1079         }
1080
1081         if (helper) {
1082                 transport_helper_init(ret, helper);
1083         } else if (starts_with(url, "rsync:")) {
1084                 die(_("git-over-rsync is no longer supported"));
1085         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
1086                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
1087                 bundle_header_init(&data->header);
1088                 transport_check_allowed("file");
1089                 ret->data = data;
1090                 ret->vtable = &bundle_vtable;
1091                 ret->smart_options = NULL;
1092         } else if (!is_url(url)
1093                 || starts_with(url, "file://")
1094                 || starts_with(url, "git://")
1095                 || starts_with(url, "ssh://")
1096                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
1097                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
1098                 ) {
1099                 /*
1100                  * These are builtin smart transports; "allowed" transports
1101                  * will be checked individually in git_connect.
1102                  */
1103                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
1104                 ret->data = data;
1105                 ret->vtable = &builtin_smart_vtable;
1106                 ret->smart_options = &(data->options);
1107
1108                 data->conn = NULL;
1109                 data->got_remote_heads = 0;
1110         } else {
1111                 /* Unknown protocol in URL. Pass to external handler. */
1112                 int len = external_specification_len(url);
1113                 char *handler = xmemdupz(url, len);
1114                 transport_helper_init(ret, handler);
1115         }
1116
1117         if (ret->smart_options) {
1118                 ret->smart_options->thin = 1;
1119                 ret->smart_options->uploadpack = "git-upload-pack";
1120                 if (remote->uploadpack)
1121                         ret->smart_options->uploadpack = remote->uploadpack;
1122                 ret->smart_options->receivepack = "git-receive-pack";
1123                 if (remote->receivepack)
1124                         ret->smart_options->receivepack = remote->receivepack;
1125         }
1126
1127         ret->hash_algo = &hash_algos[GIT_HASH_SHA1];
1128
1129         return ret;
1130 }
1131
1132 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport)
1133 {
1134         return transport->hash_algo;
1135 }
1136
1137 int transport_set_option(struct transport *transport,
1138                          const char *name, const char *value)
1139 {
1140         int git_reports = 1, protocol_reports = 1;
1141
1142         if (transport->smart_options)
1143                 git_reports = set_git_option(transport->smart_options,
1144                                              name, value);
1145
1146         if (transport->vtable->set_option)
1147                 protocol_reports = transport->vtable->set_option(transport,
1148                                                                  name, value);
1149
1150         /* If either report is 0, report 0 (success). */
1151         if (!git_reports || !protocol_reports)
1152                 return 0;
1153         /* If either reports -1 (invalid value), report -1. */
1154         if ((git_reports == -1) || (protocol_reports == -1))
1155                 return -1;
1156         /* Otherwise if both report unknown, report unknown. */
1157         return 1;
1158 }
1159
1160 void transport_set_verbosity(struct transport *transport, int verbosity,
1161         int force_progress)
1162 {
1163         if (verbosity >= 1)
1164                 transport->verbose = verbosity <= 3 ? verbosity : 3;
1165         if (verbosity < 0)
1166                 transport->verbose = -1;
1167
1168         /**
1169          * Rules used to determine whether to report progress (processing aborts
1170          * when a rule is satisfied):
1171          *
1172          *   . Report progress, if force_progress is 1 (ie. --progress).
1173          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1174          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1175          *   . Report progress if isatty(2) is 1.
1176          **/
1177         if (force_progress >= 0)
1178                 transport->progress = !!force_progress;
1179         else
1180                 transport->progress = verbosity >= 0 && isatty(2);
1181 }
1182
1183 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1184 {
1185         int i;
1186
1187         fprintf(stderr, _("The following submodule paths contain changes that can\n"
1188                         "not be found on any remote:\n"));
1189         for (i = 0; i < needs_pushing->nr; i++)
1190                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
1191         fprintf(stderr, _("\nPlease try\n\n"
1192                           "     git push --recurse-submodules=on-demand\n\n"
1193                           "or cd to the path and use\n\n"
1194                           "     git push\n\n"
1195                           "to push them to a remote.\n\n"));
1196
1197         string_list_clear(needs_pushing, 0);
1198
1199         die(_("Aborting."));
1200 }
1201
1202 static int run_pre_push_hook(struct transport *transport,
1203                              struct ref *remote_refs)
1204 {
1205         int ret = 0, x;
1206         struct ref *r;
1207         struct child_process proc = CHILD_PROCESS_INIT;
1208         struct strbuf buf;
1209         const char *argv[4];
1210
1211         if (!(argv[0] = find_hook("pre-push")))
1212                 return 0;
1213
1214         argv[1] = transport->remote->name;
1215         argv[2] = transport->url;
1216         argv[3] = NULL;
1217
1218         proc.argv = argv;
1219         proc.in = -1;
1220         proc.trace2_hook_name = "pre-push";
1221
1222         if (start_command(&proc)) {
1223                 finish_command(&proc);
1224                 return -1;
1225         }
1226
1227         sigchain_push(SIGPIPE, SIG_IGN);
1228
1229         strbuf_init(&buf, 256);
1230
1231         for (r = remote_refs; r; r = r->next) {
1232                 if (!r->peer_ref) continue;
1233                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
1234                 if (r->status == REF_STATUS_REJECT_STALE) continue;
1235                 if (r->status == REF_STATUS_REJECT_REMOTE_UPDATED) continue;
1236                 if (r->status == REF_STATUS_UPTODATE) continue;
1237
1238                 strbuf_reset(&buf);
1239                 strbuf_addf( &buf, "%s %s %s %s\n",
1240                          r->peer_ref->name, oid_to_hex(&r->new_oid),
1241                          r->name, oid_to_hex(&r->old_oid));
1242
1243                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
1244                         /* We do not mind if a hook does not read all refs. */
1245                         if (errno != EPIPE)
1246                                 ret = -1;
1247                         break;
1248                 }
1249         }
1250
1251         strbuf_release(&buf);
1252
1253         x = close(proc.in);
1254         if (!ret)
1255                 ret = x;
1256
1257         sigchain_pop(SIGPIPE);
1258
1259         x = finish_command(&proc);
1260         if (!ret)
1261                 ret = x;
1262
1263         return ret;
1264 }
1265
1266 int transport_push(struct repository *r,
1267                    struct transport *transport,
1268                    struct refspec *rs, int flags,
1269                    unsigned int *reject_reasons)
1270 {
1271         *reject_reasons = 0;
1272
1273         if (transport_color_config() < 0)
1274                 return -1;
1275
1276         if (transport->vtable->push_refs) {
1277                 struct ref *remote_refs;
1278                 struct ref *local_refs = get_local_heads();
1279                 int match_flags = MATCH_REFS_NONE;
1280                 int verbose = (transport->verbose > 0);
1281                 int quiet = (transport->verbose < 0);
1282                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1283                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1284                 int push_ret, ret, err;
1285                 struct transport_ls_refs_options transport_options =
1286                         TRANSPORT_LS_REFS_OPTIONS_INIT;
1287
1288                 if (check_push_refs(local_refs, rs) < 0)
1289                         return -1;
1290
1291                 refspec_ref_prefixes(rs, &transport_options.ref_prefixes);
1292
1293                 trace2_region_enter("transport_push", "get_refs_list", r);
1294                 remote_refs = transport->vtable->get_refs_list(transport, 1,
1295                                                                &transport_options);
1296                 trace2_region_leave("transport_push", "get_refs_list", r);
1297
1298                 strvec_clear(&transport_options.ref_prefixes);
1299
1300                 if (flags & TRANSPORT_PUSH_ALL)
1301                         match_flags |= MATCH_REFS_ALL;
1302                 if (flags & TRANSPORT_PUSH_MIRROR)
1303                         match_flags |= MATCH_REFS_MIRROR;
1304                 if (flags & TRANSPORT_PUSH_PRUNE)
1305                         match_flags |= MATCH_REFS_PRUNE;
1306                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
1307                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
1308
1309                 if (match_push_refs(local_refs, &remote_refs, rs, match_flags))
1310                         return -1;
1311
1312                 if (transport->smart_options &&
1313                     transport->smart_options->cas &&
1314                     !is_empty_cas(transport->smart_options->cas))
1315                         apply_push_cas(transport->smart_options->cas,
1316                                        transport->remote, remote_refs);
1317
1318                 set_ref_status_for_push(remote_refs,
1319                         flags & TRANSPORT_PUSH_MIRROR,
1320                         flags & TRANSPORT_PUSH_FORCE);
1321
1322                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
1323                         if (run_pre_push_hook(transport, remote_refs))
1324                                 return -1;
1325
1326                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1327                               TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1328                     !is_bare_repository()) {
1329                         struct ref *ref = remote_refs;
1330                         struct oid_array commits = OID_ARRAY_INIT;
1331
1332                         trace2_region_enter("transport_push", "push_submodules", r);
1333                         for (; ref; ref = ref->next)
1334                                 if (!is_null_oid(&ref->new_oid))
1335                                         oid_array_append(&commits,
1336                                                           &ref->new_oid);
1337
1338                         if (!push_unpushed_submodules(r,
1339                                                       &commits,
1340                                                       transport->remote,
1341                                                       rs,
1342                                                       transport->push_options,
1343                                                       pretend)) {
1344                                 oid_array_clear(&commits);
1345                                 trace2_region_leave("transport_push", "push_submodules", r);
1346                                 die(_("failed to push all needed submodules"));
1347                         }
1348                         oid_array_clear(&commits);
1349                         trace2_region_leave("transport_push", "push_submodules", r);
1350                 }
1351
1352                 if (((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) ||
1353                      ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1354                                 TRANSPORT_RECURSE_SUBMODULES_ONLY)) &&
1355                       !pretend)) && !is_bare_repository()) {
1356                         struct ref *ref = remote_refs;
1357                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
1358                         struct oid_array commits = OID_ARRAY_INIT;
1359
1360                         trace2_region_enter("transport_push", "check_submodules", r);
1361                         for (; ref; ref = ref->next)
1362                                 if (!is_null_oid(&ref->new_oid))
1363                                         oid_array_append(&commits,
1364                                                           &ref->new_oid);
1365
1366                         if (find_unpushed_submodules(r,
1367                                                      &commits,
1368                                                      transport->remote->name,
1369                                                      &needs_pushing)) {
1370                                 oid_array_clear(&commits);
1371                                 trace2_region_leave("transport_push", "check_submodules", r);
1372                                 die_with_unpushed_submodules(&needs_pushing);
1373                         }
1374                         string_list_clear(&needs_pushing, 0);
1375                         oid_array_clear(&commits);
1376                         trace2_region_leave("transport_push", "check_submodules", r);
1377                 }
1378
1379                 if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY)) {
1380                         trace2_region_enter("transport_push", "push_refs", r);
1381                         push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
1382                         trace2_region_leave("transport_push", "push_refs", r);
1383                 } else
1384                         push_ret = 0;
1385                 err = push_had_errors(remote_refs);
1386                 ret = push_ret | err;
1387
1388                 if (!quiet || err)
1389                         transport_print_push_status(transport->url, remote_refs,
1390                                         verbose | porcelain, porcelain,
1391                                         reject_reasons);
1392
1393                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1394                         set_upstreams(transport, remote_refs, pretend);
1395
1396                 if (!(flags & (TRANSPORT_PUSH_DRY_RUN |
1397                                TRANSPORT_RECURSE_SUBMODULES_ONLY))) {
1398                         struct ref *ref;
1399                         for (ref = remote_refs; ref; ref = ref->next)
1400                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1401                 }
1402
1403                 if (porcelain && !push_ret)
1404                         puts("Done");
1405                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1406                         fprintf(stderr, "Everything up-to-date\n");
1407
1408                 return ret;
1409         }
1410         return 1;
1411 }
1412
1413 const struct ref *transport_get_remote_refs(struct transport *transport,
1414                                             struct transport_ls_refs_options *transport_options)
1415 {
1416         if (!transport->got_remote_refs) {
1417                 transport->remote_refs =
1418                         transport->vtable->get_refs_list(transport, 0,
1419                                                          transport_options);
1420                 transport->got_remote_refs = 1;
1421         }
1422
1423         return transport->remote_refs;
1424 }
1425
1426 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1427 {
1428         int rc;
1429         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1430         struct ref **heads = NULL;
1431         struct ref *rm;
1432
1433         for (rm = refs; rm; rm = rm->next) {
1434                 nr_refs++;
1435                 if (rm->peer_ref &&
1436                     !is_null_oid(&rm->old_oid) &&
1437                     oideq(&rm->peer_ref->old_oid, &rm->old_oid))
1438                         continue;
1439                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1440                 heads[nr_heads++] = rm;
1441         }
1442
1443         if (!nr_heads) {
1444                 /*
1445                  * When deepening of a shallow repository is requested,
1446                  * then local and remote refs are likely to still be equal.
1447                  * Just feed them all to the fetch method in that case.
1448                  * This condition shouldn't be met in a non-deepening fetch
1449                  * (see builtin/fetch.c:quickfetch()).
1450                  */
1451                 ALLOC_ARRAY(heads, nr_refs);
1452                 for (rm = refs; rm; rm = rm->next)
1453                         heads[nr_heads++] = rm;
1454         }
1455
1456         rc = transport->vtable->fetch(transport, nr_heads, heads);
1457
1458         free(heads);
1459         return rc;
1460 }
1461
1462 void transport_unlock_pack(struct transport *transport)
1463 {
1464         int i;
1465
1466         for (i = 0; i < transport->pack_lockfiles.nr; i++)
1467                 unlink_or_warn(transport->pack_lockfiles.items[i].string);
1468         string_list_clear(&transport->pack_lockfiles, 0);
1469 }
1470
1471 int transport_connect(struct transport *transport, const char *name,
1472                       const char *exec, int fd[2])
1473 {
1474         if (transport->vtable->connect)
1475                 return transport->vtable->connect(transport, name, exec, fd);
1476         else
1477                 die(_("operation not supported by protocol"));
1478 }
1479
1480 int transport_disconnect(struct transport *transport)
1481 {
1482         int ret = 0;
1483         if (transport->vtable->disconnect)
1484                 ret = transport->vtable->disconnect(transport);
1485         if (transport->got_remote_refs)
1486                 free_refs((void *)transport->remote_refs);
1487         free(transport);
1488         return ret;
1489 }
1490
1491 /*
1492  * Strip username (and password) from a URL and return
1493  * it in a newly allocated string.
1494  */
1495 char *transport_anonymize_url(const char *url)
1496 {
1497         char *scheme_prefix, *anon_part;
1498         size_t anon_len, prefix_len = 0;
1499
1500         anon_part = strchr(url, '@');
1501         if (url_is_local_not_ssh(url) || !anon_part)
1502                 goto literal_copy;
1503
1504         anon_len = strlen(++anon_part);
1505         scheme_prefix = strstr(url, "://");
1506         if (!scheme_prefix) {
1507                 if (!strchr(anon_part, ':'))
1508                         /* cannot be "me@there:/path/name" */
1509                         goto literal_copy;
1510         } else {
1511                 const char *cp;
1512                 /* make sure scheme is reasonable */
1513                 for (cp = url; cp < scheme_prefix; cp++) {
1514                         switch (*cp) {
1515                                 /* RFC 1738 2.1 */
1516                         case '+': case '.': case '-':
1517                                 break; /* ok */
1518                         default:
1519                                 if (isalnum(*cp))
1520                                         break;
1521                                 /* it isn't */
1522                                 goto literal_copy;
1523                         }
1524                 }
1525                 /* @ past the first slash does not count */
1526                 cp = strchr(scheme_prefix + 3, '/');
1527                 if (cp && cp < anon_part)
1528                         goto literal_copy;
1529                 prefix_len = scheme_prefix - url + 3;
1530         }
1531         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1532                        (int)anon_len, anon_part);
1533 literal_copy:
1534         return xstrdup(url);
1535 }