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