git.oblomov.eu Git - git/blob - transport.c

   1 #include "cache.h"
   2 #include "transport.h"
   3 #include "run-command.h"
   4 #include "pkt-line.h"
   5 #include "fetch-pack.h"
   6 #include "remote.h"
   7 #include "connect.h"
   8 #include "send-pack.h"
   9 #include "walker.h"
  10 #include "bundle.h"
  11 #include "dir.h"
  12 #include "refs.h"
  13 #include "branch.h"
  14 #include "url.h"
  15 #include "submodule.h"
  16 #include "string-list.h"
  17 #include "sha1-array.h"
  18 #include "sigchain.h"
  19
  20 static void set_upstreams(struct transport *transport, struct ref *refs,
  21         int pretend)
  22 {
  23         struct ref *ref;
  24         for (ref = refs; ref; ref = ref->next) {
  25                 const char *localname;
  26                 const char *tmp;
  27                 const char *remotename;
  28                 unsigned char sha[20];
  29                 int flag = 0;
  30                 /*
  31                  * Check suitability for tracking. Must be successful /
  32                  * already up-to-date ref create/modify (not delete).
  33                  */
  34                 if (ref->status != REF_STATUS_OK &&
  35                         ref->status != REF_STATUS_UPTODATE)
  36                         continue;
  37                 if (!ref->peer_ref)
  38                         continue;
  39                 if (is_null_oid(&ref->new_oid))
  40                         continue;
  41
  42                 /* Follow symbolic refs (mainly for HEAD). */
  43                 localname = ref->peer_ref->name;
  44                 remotename = ref->name;
  45                 tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
  46                                          sha, &flag);
  47                 if (tmp && flag & REF_ISSYMREF &&
  48                         starts_with(tmp, "refs/heads/"))
  49                         localname = tmp;
  50
  51                 /* Both source and destination must be local branches. */
  52                 if (!localname || !starts_with(localname, "refs/heads/"))
  53                         continue;
  54                 if (!remotename || !starts_with(remotename, "refs/heads/"))
  55                         continue;
  56
  57                 if (!pretend)
  58                         install_branch_config(BRANCH_CONFIG_VERBOSE,
  59                                 localname + 11, transport->remote->name,
  60                                 remotename);
  61                 else
  62                         printf(_("Would set upstream of '%s' to '%s' of '%s'\n"),
  63                                 localname + 11, remotename + 11,
  64                                 transport->remote->name);
  65         }
  66 }
  67
  68 struct bundle_transport_data {
  69         int fd;
  70         struct bundle_header header;
  71 };
  72
  73 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
  74 {
  75         struct bundle_transport_data *data = transport->data;
  76         struct ref *result = NULL;
  77         int i;
  78
  79         if (for_push)
  80                 return NULL;
  81
  82         if (data->fd > 0)
  83                 close(data->fd);
  84         data->fd = read_bundle_header(transport->url, &data->header);
  85         if (data->fd < 0)
  86                 die ("Could not read bundle '%s'.", transport->url);
  87         for (i = 0; i < data->header.references.nr; i++) {
  88                 struct ref_list_entry *e = data->header.references.list + i;
  89                 struct ref *ref = alloc_ref(e->name);
  90                 hashcpy(ref->old_oid.hash, e->sha1);
  91                 ref->next = result;
  92                 result = ref;
  93         }
  94         return result;
  95 }
  96
  97 static int fetch_refs_from_bundle(struct transport *transport,
  98                                int nr_heads, struct ref **to_fetch)
  99 {
 100         struct bundle_transport_data *data = transport->data;
 101         return unbundle(&data->header, data->fd,
 102                         transport->progress ? BUNDLE_VERBOSE : 0);
 103 }
 104
 105 static int close_bundle(struct transport *transport)
 106 {
 107         struct bundle_transport_data *data = transport->data;
 108         if (data->fd > 0)
 109                 close(data->fd);
 110         free(data);
 111         return 0;
 112 }
 113
 114 struct git_transport_data {
 115         struct git_transport_options options;
 116         struct child_process *conn;
 117         int fd[2];
 118         unsigned got_remote_heads : 1;
 119         struct sha1_array extra_have;
 120         struct sha1_array shallow;
 121 };
 122
 123 static int set_git_option(struct git_transport_options *opts,
 124                           const char *name, const char *value)
 125 {
 126         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 127                 opts->uploadpack = value;
 128                 return 0;
 129         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 130                 opts->receivepack = value;
 131                 return 0;
 132         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 133                 opts->thin = !!value;
 134                 return 0;
 135         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 136                 opts->followtags = !!value;
 137                 return 0;
 138         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 139                 opts->keep = !!value;
 140                 return 0;
 141         } else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
 142                 opts->update_shallow = !!value;
 143                 return 0;
 144         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 145                 if (!value)
 146                         opts->depth = 0;
 147                 else {
 148                         char *end;
 149                         opts->depth = strtol(value, &end, 0);
 150                         if (*end)
 151                                 die(_("transport: invalid depth option '%s'"), value);
 152                 }
 153                 return 0;
 154         } else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
 155                 opts->deepen_since = value;
 156                 return 0;
 157         } else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
 158                 opts->deepen_not = (const struct string_list *)value;
 159                 return 0;
 160         } else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
 161                 opts->deepen_relative = !!value;
 162                 return 0;
 163         }
 164         return 1;
 165 }
 166
 167 static int connect_setup(struct transport *transport, int for_push)
 168 {
 169         struct git_transport_data *data = transport->data;
 170         int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
 171
 172         if (data->conn)
 173                 return 0;
 174
 175         switch (transport->family) {
 176         case TRANSPORT_FAMILY_ALL: break;
 177         case TRANSPORT_FAMILY_IPV4: flags |= CONNECT_IPV4; break;
 178         case TRANSPORT_FAMILY_IPV6: flags |= CONNECT_IPV6; break;
 179         }
 180
 181         data->conn = git_connect(data->fd, transport->url,
 182                                  for_push ? data->options.receivepack :
 183                                  data->options.uploadpack,
 184                                  flags);
 185
 186         return 0;
 187 }
 188
 189 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 190 {
 191         struct git_transport_data *data = transport->data;
 192         struct ref *refs;
 193
 194         connect_setup(transport, for_push);
 195         get_remote_heads(data->fd[0], NULL, 0, &refs,
 196                          for_push ? REF_NORMAL : 0,
 197                          &data->extra_have,
 198                          &data->shallow);
 199         data->got_remote_heads = 1;
 200
 201         return refs;
 202 }
 203
 204 static int fetch_refs_via_pack(struct transport *transport,
 205                                int nr_heads, struct ref **to_fetch)
 206 {
 207         struct git_transport_data *data = transport->data;
 208         struct ref *refs;
 209         char *dest = xstrdup(transport->url);
 210         struct fetch_pack_args args;
 211         struct ref *refs_tmp = NULL;
 212
 213         memset(&args, 0, sizeof(args));
 214         args.uploadpack = data->options.uploadpack;
 215         args.keep_pack = data->options.keep;
 216         args.lock_pack = 1;
 217         args.use_thin_pack = data->options.thin;
 218         args.include_tag = data->options.followtags;
 219         args.verbose = (transport->verbose > 1);
 220         args.quiet = (transport->verbose < 0);
 221         args.no_progress = !transport->progress;
 222         args.depth = data->options.depth;
 223         args.deepen_since = data->options.deepen_since;
 224         args.deepen_not = data->options.deepen_not;
 225         args.deepen_relative = data->options.deepen_relative;
 226         args.check_self_contained_and_connected =
 227                 data->options.check_self_contained_and_connected;
 228         args.cloning = transport->cloning;
 229         args.update_shallow = data->options.update_shallow;
 230
 231         if (!data->got_remote_heads) {
 232                 connect_setup(transport, 0);
 233                 get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
 234                                  NULL, &data->shallow);
 235                 data->got_remote_heads = 1;
 236         }
 237
 238         refs = fetch_pack(&args, data->fd, data->conn,
 239                           refs_tmp ? refs_tmp : transport->remote_refs,
 240                           dest, to_fetch, nr_heads, &data->shallow,
 241                           &transport->pack_lockfile);
 242         close(data->fd[0]);
 243         close(data->fd[1]);
 244         if (finish_connect(data->conn)) {
 245                 free_refs(refs);
 246                 refs = NULL;
 247         }
 248         data->conn = NULL;
 249         data->got_remote_heads = 0;
 250         data->options.self_contained_and_connected =
 251                 args.self_contained_and_connected;
 252
 253         free_refs(refs_tmp);
 254         free_refs(refs);
 255         free(dest);
 256         return (refs ? 0 : -1);
 257 }
 258
 259 static int push_had_errors(struct ref *ref)
 260 {
 261         for (; ref; ref = ref->next) {
 262                 switch (ref->status) {
 263                 case REF_STATUS_NONE:
 264                 case REF_STATUS_UPTODATE:
 265                 case REF_STATUS_OK:
 266                         break;
 267                 default:
 268                         return 1;
 269                 }
 270         }
 271         return 0;
 272 }
 273
 274 int transport_refs_pushed(struct ref *ref)
 275 {
 276         for (; ref; ref = ref->next) {
 277                 switch(ref->status) {
 278                 case REF_STATUS_NONE:
 279                 case REF_STATUS_UPTODATE:
 280                         break;
 281                 default:
 282                         return 1;
 283                 }
 284         }
 285         return 0;
 286 }
 287
 288 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 289 {
 290         struct refspec rs;
 291
 292         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 293                 return;
 294
 295         rs.src = ref->name;
 296         rs.dst = NULL;
 297
 298         if (!remote_find_tracking(remote, &rs)) {
 299                 if (verbose)
 300                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 301                 if (ref->deletion) {
 302                         delete_ref(rs.dst, NULL, 0);
 303                 } else
 304                         update_ref("update by push", rs.dst,
 305                                         ref->new_oid.hash, NULL, 0, 0);
 306                 free(rs.dst);
 307         }
 308 }
 309
 310 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 311 {
 312         if (porcelain) {
 313                 if (from)
 314                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 315                 else
 316                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
 317                 if (msg)
 318                         fprintf(stdout, "%s (%s)\n", summary, msg);
 319                 else
 320                         fprintf(stdout, "%s\n", summary);
 321         } else {
 322                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 323                 if (from)
 324                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 325                 else
 326                         fputs(prettify_refname(to->name), stderr);
 327                 if (msg) {
 328                         fputs(" (", stderr);
 329                         fputs(msg, stderr);
 330                         fputc(')', stderr);
 331                 }
 332                 fputc('\n', stderr);
 333         }
 334 }
 335
 336 static void print_ok_ref_status(struct ref *ref, int porcelain)
 337 {
 338         if (ref->deletion)
 339                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 340         else if (is_null_oid(&ref->old_oid))
 341                 print_ref_status('*',
 342                         (starts_with(ref->name, "refs/tags/") ? "[new tag]" :
 343                         "[new branch]"),
 344                         ref, ref->peer_ref, NULL, porcelain);
 345         else {
 346                 struct strbuf quickref = STRBUF_INIT;
 347                 char type;
 348                 const char *msg;
 349
 350                 strbuf_add_unique_abbrev(&quickref, ref->old_oid.hash,
 351                                          DEFAULT_ABBREV);
 352                 if (ref->forced_update) {
 353                         strbuf_addstr(&quickref, "...");
 354                         type = '+';
 355                         msg = "forced update";
 356                 } else {
 357                         strbuf_addstr(&quickref, "..");
 358                         type = ' ';
 359                         msg = NULL;
 360                 }
 361                 strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash,
 362                                          DEFAULT_ABBREV);
 363
 364                 print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg, porcelain);
 365                 strbuf_release(&quickref);
 366         }
 367 }
 368
 369 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 370 {
 371         if (!count) {
 372                 char *url = transport_anonymize_url(dest);
 373                 fprintf(porcelain ? stdout : stderr, "To %s\n", url);
 374                 free(url);
 375         }
 376
 377         switch(ref->status) {
 378         case REF_STATUS_NONE:
 379                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 380                 break;
 381         case REF_STATUS_REJECT_NODELETE:
 382                 print_ref_status('!', "[rejected]", ref, NULL,
 383                                                  "remote does not support deleting refs", porcelain);
 384                 break;
 385         case REF_STATUS_UPTODATE:
 386                 print_ref_status('=', "[up to date]", ref,
 387                                                  ref->peer_ref, NULL, porcelain);
 388                 break;
 389         case REF_STATUS_REJECT_NONFASTFORWARD:
 390                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 391                                                  "non-fast-forward", porcelain);
 392                 break;
 393         case REF_STATUS_REJECT_ALREADY_EXISTS:
 394                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 395                                                  "already exists", porcelain);
 396                 break;
 397         case REF_STATUS_REJECT_FETCH_FIRST:
 398                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 399                                                  "fetch first", porcelain);
 400                 break;
 401         case REF_STATUS_REJECT_NEEDS_FORCE:
 402                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 403                                                  "needs force", porcelain);
 404                 break;
 405         case REF_STATUS_REJECT_STALE:
 406                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 407                                                  "stale info", porcelain);
 408                 break;
 409         case REF_STATUS_REJECT_SHALLOW:
 410                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 411                                                  "new shallow roots not allowed", porcelain);
 412                 break;
 413         case REF_STATUS_REMOTE_REJECT:
 414                 print_ref_status('!', "[remote rejected]", ref,
 415                                                  ref->deletion ? NULL : ref->peer_ref,
 416                                                  ref->remote_status, porcelain);
 417                 break;
 418         case REF_STATUS_EXPECTING_REPORT:
 419                 print_ref_status('!', "[remote failure]", ref,
 420                                                  ref->deletion ? NULL : ref->peer_ref,
 421                                                  "remote failed to report status", porcelain);
 422                 break;
 423         case REF_STATUS_ATOMIC_PUSH_FAILED:
 424                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 425                                                  "atomic push failed", porcelain);
 426                 break;
 427         case REF_STATUS_OK:
 428                 print_ok_ref_status(ref, porcelain);
 429                 break;
 430         }
 431
 432         return 1;
 433 }
 434
 435 void transport_print_push_status(const char *dest, struct ref *refs,
 436                                   int verbose, int porcelain, unsigned int *reject_reasons)
 437 {
 438         struct ref *ref;
 439         int n = 0;
 440         unsigned char head_sha1[20];
 441         char *head;
 442
 443         head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
 444
 445         if (verbose) {
 446                 for (ref = refs; ref; ref = ref->next)
 447                         if (ref->status == REF_STATUS_UPTODATE)
 448                                 n += print_one_push_status(ref, dest, n, porcelain);
 449         }
 450
 451         for (ref = refs; ref; ref = ref->next)
 452                 if (ref->status == REF_STATUS_OK)
 453                         n += print_one_push_status(ref, dest, n, porcelain);
 454
 455         *reject_reasons = 0;
 456         for (ref = refs; ref; ref = ref->next) {
 457                 if (ref->status != REF_STATUS_NONE &&
 458                     ref->status != REF_STATUS_UPTODATE &&
 459                     ref->status != REF_STATUS_OK)
 460                         n += print_one_push_status(ref, dest, n, porcelain);
 461                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
 462                         if (head != NULL && !strcmp(head, ref->name))
 463                                 *reject_reasons |= REJECT_NON_FF_HEAD;
 464                         else
 465                                 *reject_reasons |= REJECT_NON_FF_OTHER;
 466                 } else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
 467                         *reject_reasons |= REJECT_ALREADY_EXISTS;
 468                 } else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
 469                         *reject_reasons |= REJECT_FETCH_FIRST;
 470                 } else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
 471                         *reject_reasons |= REJECT_NEEDS_FORCE;
 472                 }
 473         }
 474         free(head);
 475 }
 476
 477 void transport_verify_remote_names(int nr_heads, const char **heads)
 478 {
 479         int i;
 480
 481         for (i = 0; i < nr_heads; i++) {
 482                 const char *local = heads[i];
 483                 const char *remote = strrchr(heads[i], ':');
 484
 485                 if (*local == '+')
 486                         local++;
 487
 488                 /* A matching refspec is okay.  */
 489                 if (remote == local && remote[1] == '\0')
 490                         continue;
 491
 492                 remote = remote ? (remote + 1) : local;
 493                 if (check_refname_format(remote,
 494                                 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 495                         die("remote part of refspec is not a valid name in %s",
 496                                 heads[i]);
 497         }
 498 }
 499
 500 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 501 {
 502         struct git_transport_data *data = transport->data;
 503         struct send_pack_args args;
 504         int ret;
 505
 506         if (!data->got_remote_heads) {
 507                 struct ref *tmp_refs;
 508                 connect_setup(transport, 1);
 509
 510                 get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
 511                                  NULL, &data->shallow);
 512                 data->got_remote_heads = 1;
 513         }
 514
 515         memset(&args, 0, sizeof(args));
 516         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 517         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 518         args.use_thin_pack = data->options.thin;
 519         args.verbose = (transport->verbose > 0);
 520         args.quiet = (transport->verbose < 0);
 521         args.progress = transport->progress;
 522         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 523         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 524         args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
 525         args.push_options = transport->push_options;
 526         args.url = transport->url;
 527
 528         if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
 529                 args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
 530         else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
 531                 args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
 532         else
 533                 args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
 534
 535         ret = send_pack(&args, data->fd, data->conn, remote_refs,
 536                         &data->extra_have);
 537
 538         close(data->fd[1]);
 539         close(data->fd[0]);
 540         ret |= finish_connect(data->conn);
 541         data->conn = NULL;
 542         data->got_remote_heads = 0;
 543
 544         return ret;
 545 }
 546
 547 static int connect_git(struct transport *transport, const char *name,
 548                        const char *executable, int fd[2])
 549 {
 550         struct git_transport_data *data = transport->data;
 551         data->conn = git_connect(data->fd, transport->url,
 552                                  executable, 0);
 553         fd[0] = data->fd[0];
 554         fd[1] = data->fd[1];
 555         return 0;
 556 }
 557
 558 static int disconnect_git(struct transport *transport)
 559 {
 560         struct git_transport_data *data = transport->data;
 561         if (data->conn) {
 562                 if (data->got_remote_heads)
 563                         packet_flush(data->fd[1]);
 564                 close(data->fd[0]);
 565                 close(data->fd[1]);
 566                 finish_connect(data->conn);
 567         }
 568
 569         free(data);
 570         return 0;
 571 }
 572
 573 void transport_take_over(struct transport *transport,
 574                          struct child_process *child)
 575 {
 576         struct git_transport_data *data;
 577
 578         if (!transport->smart_options)
 579                 die("BUG: taking over transport requires non-NULL "
 580                     "smart_options field.");
 581
 582         data = xcalloc(1, sizeof(*data));
 583         data->options = *transport->smart_options;
 584         data->conn = child;
 585         data->fd[0] = data->conn->out;
 586         data->fd[1] = data->conn->in;
 587         data->got_remote_heads = 0;
 588         transport->data = data;
 589
 590         transport->set_option = NULL;
 591         transport->get_refs_list = get_refs_via_connect;
 592         transport->fetch = fetch_refs_via_pack;
 593         transport->push = NULL;
 594         transport->push_refs = git_transport_push;
 595         transport->disconnect = disconnect_git;
 596         transport->smart_options = &(data->options);
 597
 598         transport->cannot_reuse = 1;
 599 }
 600
 601 static int is_file(const char *url)
 602 {
 603         struct stat buf;
 604         if (stat(url, &buf))
 605                 return 0;
 606         return S_ISREG(buf.st_mode);
 607 }
 608
 609 static int external_specification_len(const char *url)
 610 {
 611         return strchr(url, ':') - url;
 612 }
 613
 614 static const struct string_list *protocol_whitelist(void)
 615 {
 616         static int enabled = -1;
 617         static struct string_list allowed = STRING_LIST_INIT_DUP;
 618
 619         if (enabled < 0) {
 620                 const char *v = getenv("GIT_ALLOW_PROTOCOL");
 621                 if (v) {
 622                         string_list_split(&allowed, v, ':', -1);
 623                         string_list_sort(&allowed);
 624                         enabled = 1;
 625                 } else {
 626                         enabled = 0;
 627                 }
 628         }
 629
 630         return enabled ? &allowed : NULL;
 631 }
 632
 633 int is_transport_allowed(const char *type)
 634 {
 635         const struct string_list *allowed = protocol_whitelist();
 636         return !allowed || string_list_has_string(allowed, type);
 637 }
 638
 639 void transport_check_allowed(const char *type)
 640 {
 641         if (!is_transport_allowed(type))
 642                 die("transport '%s' not allowed", type);
 643 }
 644
 645 int transport_restrict_protocols(void)
 646 {
 647         return !!protocol_whitelist();
 648 }
 649
 650 struct transport *transport_get(struct remote *remote, const char *url)
 651 {
 652         const char *helper;
 653         struct transport *ret = xcalloc(1, sizeof(*ret));
 654
 655         ret->progress = isatty(2);
 656
 657         if (!remote)
 658                 die("No remote provided to transport_get()");
 659
 660         ret->got_remote_refs = 0;
 661         ret->remote = remote;
 662         helper = remote->foreign_vcs;
 663
 664         if (!url && remote->url)
 665                 url = remote->url[0];
 666         ret->url = url;
 667
 668         /* maybe it is a foreign URL? */
 669         if (url) {
 670                 const char *p = url;
 671
 672                 while (is_urlschemechar(p == url, *p))
 673                         p++;
 674                 if (starts_with(p, "::"))
 675                         helper = xstrndup(url, p - url);
 676         }
 677
 678         if (helper) {
 679                 transport_helper_init(ret, helper);
 680         } else if (starts_with(url, "rsync:")) {
 681                 die("git-over-rsync is no longer supported");
 682         } else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
 683                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 684                 transport_check_allowed("file");
 685                 ret->data = data;
 686                 ret->get_refs_list = get_refs_from_bundle;
 687                 ret->fetch = fetch_refs_from_bundle;
 688                 ret->disconnect = close_bundle;
 689                 ret->smart_options = NULL;
 690         } else if (!is_url(url)
 691                 || starts_with(url, "file://")
 692                 || starts_with(url, "git://")
 693                 || starts_with(url, "ssh://")
 694                 || starts_with(url, "git+ssh://") /* deprecated - do not use */
 695                 || starts_with(url, "ssh+git://") /* deprecated - do not use */
 696                 ) {
 697                 /*
 698                  * These are builtin smart transports; "allowed" transports
 699                  * will be checked individually in git_connect.
 700                  */
 701                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 702                 ret->data = data;
 703                 ret->set_option = NULL;
 704                 ret->get_refs_list = get_refs_via_connect;
 705                 ret->fetch = fetch_refs_via_pack;
 706                 ret->push_refs = git_transport_push;
 707                 ret->connect = connect_git;
 708                 ret->disconnect = disconnect_git;
 709                 ret->smart_options = &(data->options);
 710
 711                 data->conn = NULL;
 712                 data->got_remote_heads = 0;
 713         } else {
 714                 /* Unknown protocol in URL. Pass to external handler. */
 715                 int len = external_specification_len(url);
 716                 char *handler = xmemdupz(url, len);
 717                 transport_helper_init(ret, handler);
 718         }
 719
 720         if (ret->smart_options) {
 721                 ret->smart_options->thin = 1;
 722                 ret->smart_options->uploadpack = "git-upload-pack";
 723                 if (remote->uploadpack)
 724                         ret->smart_options->uploadpack = remote->uploadpack;
 725                 ret->smart_options->receivepack = "git-receive-pack";
 726                 if (remote->receivepack)
 727                         ret->smart_options->receivepack = remote->receivepack;
 728         }
 729
 730         return ret;
 731 }
 732
 733 int transport_set_option(struct transport *transport,
 734                          const char *name, const char *value)
 735 {
 736         int git_reports = 1, protocol_reports = 1;
 737
 738         if (transport->smart_options)
 739                 git_reports = set_git_option(transport->smart_options,
 740                                              name, value);
 741
 742         if (transport->set_option)
 743                 protocol_reports = transport->set_option(transport, name,
 744                                                         value);
 745
 746         /* If either report is 0, report 0 (success). */
 747         if (!git_reports || !protocol_reports)
 748                 return 0;
 749         /* If either reports -1 (invalid value), report -1. */
 750         if ((git_reports == -1) || (protocol_reports == -1))
 751                 return -1;
 752         /* Otherwise if both report unknown, report unknown. */
 753         return 1;
 754 }
 755
 756 void transport_set_verbosity(struct transport *transport, int verbosity,
 757         int force_progress)
 758 {
 759         if (verbosity >= 1)
 760                 transport->verbose = verbosity <= 3 ? verbosity : 3;
 761         if (verbosity < 0)
 762                 transport->verbose = -1;
 763
 764         /**
 765          * Rules used to determine whether to report progress (processing aborts
 766          * when a rule is satisfied):
 767          *
 768          *   . Report progress, if force_progress is 1 (ie. --progress).
 769          *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
 770          *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 771          *   . Report progress if isatty(2) is 1.
 772          **/
 773         if (force_progress >= 0)
 774                 transport->progress = !!force_progress;
 775         else
 776                 transport->progress = verbosity >= 0 && isatty(2);
 777 }
 778
 779 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
 780 {
 781         int i;
 782
 783         fprintf(stderr, _("The following submodule paths contain changes that can\n"
 784                         "not be found on any remote:\n"));
 785         for (i = 0; i < needs_pushing->nr; i++)
 786                 fprintf(stderr, "  %s\n", needs_pushing->items[i].string);
 787         fprintf(stderr, _("\nPlease try\n\n"
 788                           "     git push --recurse-submodules=on-demand\n\n"
 789                           "or cd to the path and use\n\n"
 790                           "     git push\n\n"
 791                           "to push them to a remote.\n\n"));
 792
 793         string_list_clear(needs_pushing, 0);
 794
 795         die(_("Aborting."));
 796 }
 797
 798 static int run_pre_push_hook(struct transport *transport,
 799                              struct ref *remote_refs)
 800 {
 801         int ret = 0, x;
 802         struct ref *r;
 803         struct child_process proc = CHILD_PROCESS_INIT;
 804         struct strbuf buf;
 805         const char *argv[4];
 806
 807         if (!(argv[0] = find_hook("pre-push")))
 808                 return 0;
 809
 810         argv[1] = transport->remote->name;
 811         argv[2] = transport->url;
 812         argv[3] = NULL;
 813
 814         proc.argv = argv;
 815         proc.in = -1;
 816
 817         if (start_command(&proc)) {
 818                 finish_command(&proc);
 819                 return -1;
 820         }
 821
 822         sigchain_push(SIGPIPE, SIG_IGN);
 823
 824         strbuf_init(&buf, 256);
 825
 826         for (r = remote_refs; r; r = r->next) {
 827                 if (!r->peer_ref) continue;
 828                 if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
 829                 if (r->status == REF_STATUS_REJECT_STALE) continue;
 830                 if (r->status == REF_STATUS_UPTODATE) continue;
 831
 832                 strbuf_reset(&buf);
 833                 strbuf_addf( &buf, "%s %s %s %s\n",
 834                          r->peer_ref->name, oid_to_hex(&r->new_oid),
 835                          r->name, oid_to_hex(&r->old_oid));
 836
 837                 if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
 838                         /* We do not mind if a hook does not read all refs. */
 839                         if (errno != EPIPE)
 840                                 ret = -1;
 841                         break;
 842                 }
 843         }
 844
 845         strbuf_release(&buf);
 846
 847         x = close(proc.in);
 848         if (!ret)
 849                 ret = x;
 850
 851         sigchain_pop(SIGPIPE);
 852
 853         x = finish_command(&proc);
 854         if (!ret)
 855                 ret = x;
 856
 857         return ret;
 858 }
 859
 860 int transport_push(struct transport *transport,
 861                    int refspec_nr, const char **refspec, int flags,
 862                    unsigned int *reject_reasons)
 863 {
 864         *reject_reasons = 0;
 865         transport_verify_remote_names(refspec_nr, refspec);
 866
 867         if (transport->push) {
 868                 /* Maybe FIXME. But no important transport uses this case. */
 869                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 870                         die("This transport does not support using --set-upstream");
 871
 872                 return transport->push(transport, refspec_nr, refspec, flags);
 873         } else if (transport->push_refs) {
 874                 struct ref *remote_refs;
 875                 struct ref *local_refs = get_local_heads();
 876                 int match_flags = MATCH_REFS_NONE;
 877                 int verbose = (transport->verbose > 0);
 878                 int quiet = (transport->verbose < 0);
 879                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 880                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
 881                 int push_ret, ret, err;
 882
 883                 if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
 884                         return -1;
 885
 886                 remote_refs = transport->get_refs_list(transport, 1);
 887
 888                 if (flags & TRANSPORT_PUSH_ALL)
 889                         match_flags |= MATCH_REFS_ALL;
 890                 if (flags & TRANSPORT_PUSH_MIRROR)
 891                         match_flags |= MATCH_REFS_MIRROR;
 892                 if (flags & TRANSPORT_PUSH_PRUNE)
 893                         match_flags |= MATCH_REFS_PRUNE;
 894                 if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
 895                         match_flags |= MATCH_REFS_FOLLOW_TAGS;
 896
 897                 if (match_push_refs(local_refs, &remote_refs,
 898                                     refspec_nr, refspec, match_flags)) {
 899                         return -1;
 900                 }
 901
 902                 if (transport->smart_options &&
 903                     transport->smart_options->cas &&
 904                     !is_empty_cas(transport->smart_options->cas))
 905                         apply_push_cas(transport->smart_options->cas,
 906                                        transport->remote, remote_refs);
 907
 908                 set_ref_status_for_push(remote_refs,
 909                         flags & TRANSPORT_PUSH_MIRROR,
 910                         flags & TRANSPORT_PUSH_FORCE);
 911
 912                 if (!(flags & TRANSPORT_PUSH_NO_HOOK))
 913                         if (run_pre_push_hook(transport, remote_refs))
 914                                 return -1;
 915
 916                 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
 917                         struct ref *ref = remote_refs;
 918                         struct sha1_array commits = SHA1_ARRAY_INIT;
 919
 920                         for (; ref; ref = ref->next)
 921                                 if (!is_null_oid(&ref->new_oid))
 922                                         sha1_array_append(&commits, ref->new_oid.hash);
 923
 924                         if (!push_unpushed_submodules(&commits, transport->remote->name)) {
 925                                 sha1_array_clear(&commits);
 926                                 die("Failed to push all needed submodules!");
 927                         }
 928                         sha1_array_clear(&commits);
 929                 }
 930
 931                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
 932                               TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
 933                         struct ref *ref = remote_refs;
 934                         struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 935                         struct sha1_array commits = SHA1_ARRAY_INIT;
 936
 937                         for (; ref; ref = ref->next)
 938                                 if (!is_null_oid(&ref->new_oid))
 939                                         sha1_array_append(&commits, ref->new_oid.hash);
 940
 941                         if (find_unpushed_submodules(&commits, transport->remote->name,
 942                                                 &needs_pushing)) {
 943                                 sha1_array_clear(&commits);
 944                                 die_with_unpushed_submodules(&needs_pushing);
 945                         }
 946                         string_list_clear(&needs_pushing, 0);
 947                         sha1_array_clear(&commits);
 948                 }
 949
 950                 push_ret = transport->push_refs(transport, remote_refs, flags);
 951                 err = push_had_errors(remote_refs);
 952                 ret = push_ret | err;
 953
 954                 if (!quiet || err)
 955                         transport_print_push_status(transport->url, remote_refs,
 956                                         verbose | porcelain, porcelain,
 957                                         reject_reasons);
 958
 959                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
 960                         set_upstreams(transport, remote_refs, pretend);
 961
 962                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 963                         struct ref *ref;
 964                         for (ref = remote_refs; ref; ref = ref->next)
 965                                 transport_update_tracking_ref(transport->remote, ref, verbose);
 966                 }
 967
 968                 if (porcelain && !push_ret)
 969                         puts("Done");
 970                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
 971                         fprintf(stderr, "Everything up-to-date\n");
 972
 973                 return ret;
 974         }
 975         return 1;
 976 }
 977
 978 const struct ref *transport_get_remote_refs(struct transport *transport)
 979 {
 980         if (!transport->got_remote_refs) {
 981                 transport->remote_refs = transport->get_refs_list(transport, 0);
 982                 transport->got_remote_refs = 1;
 983         }
 984
 985         return transport->remote_refs;
 986 }
 987
 988 int transport_fetch_refs(struct transport *transport, struct ref *refs)
 989 {
 990         int rc;
 991         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 992         struct ref **heads = NULL;
 993         struct ref *rm;
 994
 995         for (rm = refs; rm; rm = rm->next) {
 996                 nr_refs++;
 997                 if (rm->peer_ref &&
 998                     !is_null_oid(&rm->old_oid) &&
 999                     !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
1000                         continue;
1001                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1002                 heads[nr_heads++] = rm;
1003         }
1004
1005         if (!nr_heads) {
1006                 /*
1007                  * When deepening of a shallow repository is requested,
1008                  * then local and remote refs are likely to still be equal.
1009                  * Just feed them all to the fetch method in that case.
1010                  * This condition shouldn't be met in a non-deepening fetch
1011                  * (see builtin/fetch.c:quickfetch()).
1012                  */
1013                 ALLOC_ARRAY(heads, nr_refs);
1014                 for (rm = refs; rm; rm = rm->next)
1015                         heads[nr_heads++] = rm;
1016         }
1017
1018         rc = transport->fetch(transport, nr_heads, heads);
1019
1020         free(heads);
1021         return rc;
1022 }
1023
1024 void transport_unlock_pack(struct transport *transport)
1025 {
1026         if (transport->pack_lockfile) {
1027                 unlink_or_warn(transport->pack_lockfile);
1028                 free(transport->pack_lockfile);
1029                 transport->pack_lockfile = NULL;
1030         }
1031 }
1032
1033 int transport_connect(struct transport *transport, const char *name,
1034                       const char *exec, int fd[2])
1035 {
1036         if (transport->connect)
1037                 return transport->connect(transport, name, exec, fd);
1038         else
1039                 die("Operation not supported by protocol");
1040 }
1041
1042 int transport_disconnect(struct transport *transport)
1043 {
1044         int ret = 0;
1045         if (transport->disconnect)
1046                 ret = transport->disconnect(transport);
1047         free(transport);
1048         return ret;
1049 }
1050
1051 /*
1052  * Strip username (and password) from a URL and return
1053  * it in a newly allocated string.
1054  */
1055 char *transport_anonymize_url(const char *url)
1056 {
1057         char *scheme_prefix, *anon_part;
1058         size_t anon_len, prefix_len = 0;
1059
1060         anon_part = strchr(url, '@');
1061         if (url_is_local_not_ssh(url) || !anon_part)
1062                 goto literal_copy;
1063
1064         anon_len = strlen(++anon_part);
1065         scheme_prefix = strstr(url, "://");
1066         if (!scheme_prefix) {
1067                 if (!strchr(anon_part, ':'))
1068                         /* cannot be "me@there:/path/name" */
1069                         goto literal_copy;
1070         } else {
1071                 const char *cp;
1072                 /* make sure scheme is reasonable */
1073                 for (cp = url; cp < scheme_prefix; cp++) {
1074                         switch (*cp) {
1075                                 /* RFC 1738 2.1 */
1076                         case '+': case '.': case '-':
1077                                 break; /* ok */
1078                         default:
1079                                 if (isalnum(*cp))
1080                                         break;
1081                                 /* it isn't */
1082                                 goto literal_copy;
1083                         }
1084                 }
1085                 /* @ past the first slash does not count */
1086                 cp = strchr(scheme_prefix + 3, '/');
1087                 if (cp && cp < anon_part)
1088                         goto literal_copy;
1089                 prefix_len = scheme_prefix - url + 3;
1090         }
1091         return xstrfmt("%.*s%.*s", (int)prefix_len, url,
1092                        (int)anon_len, anon_part);
1093 literal_copy:
1094         return xstrdup(url);
1095 }
1096
1097 struct alternate_refs_data {
1098         alternate_ref_fn *fn;
1099         void *data;
1100 };
1101
1102 static int refs_from_alternate_cb(struct alternate_object_database *e,
1103                                   void *data)
1104 {
1105         char *other;
1106         size_t len;
1107         struct remote *remote;
1108         struct transport *transport;
1109         const struct ref *extra;
1110         struct alternate_refs_data *cb = data;
1111
1112         e->name[-1] = '\0';
1113         other = xstrdup(real_path(e->base));
1114         e->name[-1] = '/';
1115         len = strlen(other);
1116
1117         while (other[len-1] == '/')
1118                 other[--len] = '\0';
1119         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1120                 goto out;
1121         /* Is this a git repository with refs? */
1122         memcpy(other + len - 8, "/refs", 6);
1123         if (!is_directory(other))
1124                 goto out;
1125         other[len - 8] = '\0';
1126         remote = remote_get(other);
1127         transport = transport_get(remote, other);
1128         for (extra = transport_get_remote_refs(transport);
1129              extra;
1130              extra = extra->next)
1131                 cb->fn(extra, cb->data);
1132         transport_disconnect(transport);
1133 out:
1134         free(other);
1135         return 0;
1136 }
1137
1138 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1139 {
1140         struct alternate_refs_data cb;
1141         cb.fn = fn;
1142         cb.data = data;
1143         foreach_alt_odb(refs_from_alternate_cb, &cb);
1144 }