Pileus Git - ~andy/git/blob - transport.c

   1 #include "cache.h"
   2 #include "transport.h"
   3 #include "run-command.h"
   4 #ifndef NO_CURL
   5 #include "http.h"
   6 #endif
   7 #include "pkt-line.h"
   8 #include "fetch-pack.h"
   9 #include "send-pack.h"
  10 #include "walker.h"
  11 #include "bundle.h"
  12 #include "dir.h"
  13 #include "refs.h"
  14
  15 /* rsync support */
  16
  17 /*
  18  * We copy packed-refs and refs/ into a temporary file, then read the
  19  * loose refs recursively (sorting whenever possible), and then inserting
  20  * those packed refs that are not yet in the list (not validating, but
  21  * assuming that the file is sorted).
  22  *
  23  * Appears refactoring this from refs.c is too cumbersome.
  24  */
  25
  26 static int str_cmp(const void *a, const void *b)
  27 {
  28         const char *s1 = a;
  29         const char *s2 = b;
  30
  31         return strcmp(s1, s2);
  32 }
  33
  34 /* path->buf + name_offset is expected to point to "refs/" */
  35
  36 static int read_loose_refs(struct strbuf *path, int name_offset,
  37                 struct ref **tail)
  38 {
  39         DIR *dir = opendir(path->buf);
  40         struct dirent *de;
  41         struct {
  42                 char **entries;
  43                 int nr, alloc;
  44         } list;
  45         int i, pathlen;
  46
  47         if (!dir)
  48                 return -1;
  49
  50         memset (&list, 0, sizeof(list));
  51
  52         while ((de = readdir(dir))) {
  53                 if (is_dot_or_dotdot(de->d_name))
  54                         continue;
  55                 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  56                 list.entries[list.nr++] = xstrdup(de->d_name);
  57         }
  58         closedir(dir);
  59
  60         /* sort the list */
  61
  62         qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  63
  64         pathlen = path->len;
  65         strbuf_addch(path, '/');
  66
  67         for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  68                 strbuf_addstr(path, list.entries[i]);
  69                 if (read_loose_refs(path, name_offset, tail)) {
  70                         int fd = open(path->buf, O_RDONLY);
  71                         char buffer[40];
  72                         struct ref *next;
  73
  74                         if (fd < 0)
  75                                 continue;
  76                         next = alloc_ref(path->buf + name_offset);
  77                         if (read_in_full(fd, buffer, 40) != 40 ||
  78                                         get_sha1_hex(buffer, next->old_sha1)) {
  79                                 close(fd);
  80                                 free(next);
  81                                 continue;
  82                         }
  83                         close(fd);
  84                         (*tail)->next = next;
  85                         *tail = next;
  86                 }
  87         }
  88         strbuf_setlen(path, pathlen);
  89
  90         for (i = 0; i < list.nr; i++)
  91                 free(list.entries[i]);
  92         free(list.entries);
  93
  94         return 0;
  95 }
  96
  97 /* insert the packed refs for which no loose refs were found */
  98
  99 static void insert_packed_refs(const char *packed_refs, struct ref **list)
 100 {
 101         FILE *f = fopen(packed_refs, "r");
 102         static char buffer[PATH_MAX];
 103
 104         if (!f)
 105                 return;
 106
 107         for (;;) {
 108                 int cmp = cmp, len;
 109
 110                 if (!fgets(buffer, sizeof(buffer), f)) {
 111                         fclose(f);
 112                         return;
 113                 }
 114
 115                 if (hexval(buffer[0]) > 0xf)
 116                         continue;
 117                 len = strlen(buffer);
 118                 if (len && buffer[len - 1] == '\n')
 119                         buffer[--len] = '\0';
 120                 if (len < 41)
 121                         continue;
 122                 while ((*list)->next &&
 123                                 (cmp = strcmp(buffer + 41,
 124                                       (*list)->next->name)) > 0)
 125                         list = &(*list)->next;
 126                 if (!(*list)->next || cmp < 0) {
 127                         struct ref *next = alloc_ref(buffer + 41);
 128                         buffer[40] = '\0';
 129                         if (get_sha1_hex(buffer, next->old_sha1)) {
 130                                 warning ("invalid SHA-1: %s", buffer);
 131                                 free(next);
 132                                 continue;
 133                         }
 134                         next->next = (*list)->next;
 135                         (*list)->next = next;
 136                         list = &(*list)->next;
 137                 }
 138         }
 139 }
 140
 141 static const char *rsync_url(const char *url)
 142 {
 143         return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 144 }
 145
 146 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 147 {
 148         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 149         struct ref dummy, *tail = &dummy;
 150         struct child_process rsync;
 151         const char *args[5];
 152         int temp_dir_len;
 153
 154         if (for_push)
 155                 return NULL;
 156
 157         /* copy the refs to the temporary directory */
 158
 159         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 160         if (!mkdtemp(temp_dir.buf))
 161                 die ("Could not make temporary directory");
 162         temp_dir_len = temp_dir.len;
 163
 164         strbuf_addstr(&buf, rsync_url(transport->url));
 165         strbuf_addstr(&buf, "/refs");
 166
 167         memset(&rsync, 0, sizeof(rsync));
 168         rsync.argv = args;
 169         rsync.stdout_to_stderr = 1;
 170         args[0] = "rsync";
 171         args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 172         args[2] = buf.buf;
 173         args[3] = temp_dir.buf;
 174         args[4] = NULL;
 175
 176         if (run_command(&rsync))
 177                 die ("Could not run rsync to get refs");
 178
 179         strbuf_reset(&buf);
 180         strbuf_addstr(&buf, rsync_url(transport->url));
 181         strbuf_addstr(&buf, "/packed-refs");
 182
 183         args[2] = buf.buf;
 184
 185         if (run_command(&rsync))
 186                 die ("Could not run rsync to get refs");
 187
 188         /* read the copied refs */
 189
 190         strbuf_addstr(&temp_dir, "/refs");
 191         read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 192         strbuf_setlen(&temp_dir, temp_dir_len);
 193
 194         tail = &dummy;
 195         strbuf_addstr(&temp_dir, "/packed-refs");
 196         insert_packed_refs(temp_dir.buf, &tail);
 197         strbuf_setlen(&temp_dir, temp_dir_len);
 198
 199         if (remove_dir_recursively(&temp_dir, 0))
 200                 warning ("Error removing temporary directory %s.",
 201                                 temp_dir.buf);
 202
 203         strbuf_release(&buf);
 204         strbuf_release(&temp_dir);
 205
 206         return dummy.next;
 207 }
 208
 209 static int fetch_objs_via_rsync(struct transport *transport,
 210                                 int nr_objs, const struct ref **to_fetch)
 211 {
 212         struct strbuf buf = STRBUF_INIT;
 213         struct child_process rsync;
 214         const char *args[8];
 215         int result;
 216
 217         strbuf_addstr(&buf, rsync_url(transport->url));
 218         strbuf_addstr(&buf, "/objects/");
 219
 220         memset(&rsync, 0, sizeof(rsync));
 221         rsync.argv = args;
 222         rsync.stdout_to_stderr = 1;
 223         args[0] = "rsync";
 224         args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 225         args[2] = "--ignore-existing";
 226         args[3] = "--exclude";
 227         args[4] = "info";
 228         args[5] = buf.buf;
 229         args[6] = get_object_directory();
 230         args[7] = NULL;
 231
 232         /* NEEDSWORK: handle one level of alternates */
 233         result = run_command(&rsync);
 234
 235         strbuf_release(&buf);
 236
 237         return result;
 238 }
 239
 240 static int write_one_ref(const char *name, const unsigned char *sha1,
 241                 int flags, void *data)
 242 {
 243         struct strbuf *buf = data;
 244         int len = buf->len;
 245         FILE *f;
 246
 247         /* when called via for_each_ref(), flags is non-zero */
 248         if (flags && prefixcmp(name, "refs/heads/") &&
 249                         prefixcmp(name, "refs/tags/"))
 250                 return 0;
 251
 252         strbuf_addstr(buf, name);
 253         if (safe_create_leading_directories(buf->buf) ||
 254                         !(f = fopen(buf->buf, "w")) ||
 255                         fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 256                         fclose(f))
 257                 return error("problems writing temporary file %s", buf->buf);
 258         strbuf_setlen(buf, len);
 259         return 0;
 260 }
 261
 262 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 263                 int refspec_nr, const char **refspec)
 264 {
 265         int i;
 266
 267         for (i = 0; i < refspec_nr; i++) {
 268                 unsigned char sha1[20];
 269                 char *ref;
 270
 271                 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 272                         return error("Could not get ref %s", refspec[i]);
 273
 274                 if (write_one_ref(ref, sha1, 0, temp_dir)) {
 275                         free(ref);
 276                         return -1;
 277                 }
 278                 free(ref);
 279         }
 280         return 0;
 281 }
 282
 283 static int rsync_transport_push(struct transport *transport,
 284                 int refspec_nr, const char **refspec, int flags)
 285 {
 286         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 287         int result = 0, i;
 288         struct child_process rsync;
 289         const char *args[10];
 290
 291         if (flags & TRANSPORT_PUSH_MIRROR)
 292                 return error("rsync transport does not support mirror mode");
 293
 294         /* first push the objects */
 295
 296         strbuf_addstr(&buf, rsync_url(transport->url));
 297         strbuf_addch(&buf, '/');
 298
 299         memset(&rsync, 0, sizeof(rsync));
 300         rsync.argv = args;
 301         rsync.stdout_to_stderr = 1;
 302         i = 0;
 303         args[i++] = "rsync";
 304         args[i++] = "-a";
 305         if (flags & TRANSPORT_PUSH_DRY_RUN)
 306                 args[i++] = "--dry-run";
 307         if (transport->verbose > 0)
 308                 args[i++] = "-v";
 309         args[i++] = "--ignore-existing";
 310         args[i++] = "--exclude";
 311         args[i++] = "info";
 312         args[i++] = get_object_directory();
 313         args[i++] = buf.buf;
 314         args[i++] = NULL;
 315
 316         if (run_command(&rsync))
 317                 return error("Could not push objects to %s",
 318                                 rsync_url(transport->url));
 319
 320         /* copy the refs to the temporary directory; they could be packed. */
 321
 322         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 323         if (!mkdtemp(temp_dir.buf))
 324                 die ("Could not make temporary directory");
 325         strbuf_addch(&temp_dir, '/');
 326
 327         if (flags & TRANSPORT_PUSH_ALL) {
 328                 if (for_each_ref(write_one_ref, &temp_dir))
 329                         return -1;
 330         } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 331                 return -1;
 332
 333         i = 2;
 334         if (flags & TRANSPORT_PUSH_DRY_RUN)
 335                 args[i++] = "--dry-run";
 336         if (!(flags & TRANSPORT_PUSH_FORCE))
 337                 args[i++] = "--ignore-existing";
 338         args[i++] = temp_dir.buf;
 339         args[i++] = rsync_url(transport->url);
 340         args[i++] = NULL;
 341         if (run_command(&rsync))
 342                 result = error("Could not push to %s",
 343                                 rsync_url(transport->url));
 344
 345         if (remove_dir_recursively(&temp_dir, 0))
 346                 warning ("Could not remove temporary directory %s.",
 347                                 temp_dir.buf);
 348
 349         strbuf_release(&buf);
 350         strbuf_release(&temp_dir);
 351
 352         return result;
 353 }
 354
 355 /* Generic functions for using commit walkers */
 356
 357 #ifndef NO_CURL /* http fetch is the only user */
 358 static int fetch_objs_via_walker(struct transport *transport,
 359                                  int nr_objs, const struct ref **to_fetch)
 360 {
 361         char *dest = xstrdup(transport->url);
 362         struct walker *walker = transport->data;
 363         char **objs = xmalloc(nr_objs * sizeof(*objs));
 364         int i;
 365
 366         walker->get_all = 1;
 367         walker->get_tree = 1;
 368         walker->get_history = 1;
 369         walker->get_verbosely = transport->verbose >= 0;
 370         walker->get_recover = 0;
 371
 372         for (i = 0; i < nr_objs; i++)
 373                 objs[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
 374
 375         if (walker_fetch(walker, nr_objs, objs, NULL, NULL))
 376                 die("Fetch failed.");
 377
 378         for (i = 0; i < nr_objs; i++)
 379                 free(objs[i]);
 380         free(objs);
 381         free(dest);
 382         return 0;
 383 }
 384 #endif /* NO_CURL */
 385
 386 static int disconnect_walker(struct transport *transport)
 387 {
 388         struct walker *walker = transport->data;
 389         if (walker)
 390                 walker_free(walker);
 391         return 0;
 392 }
 393
 394 #ifndef NO_CURL
 395 static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
 396 {
 397         const char **argv;
 398         int argc;
 399         int err;
 400
 401         if (flags & TRANSPORT_PUSH_MIRROR)
 402                 return error("http transport does not support mirror mode");
 403
 404         argv = xmalloc((refspec_nr + 12) * sizeof(char *));
 405         argv[0] = "http-push";
 406         argc = 1;
 407         if (flags & TRANSPORT_PUSH_ALL)
 408                 argv[argc++] = "--all";
 409         if (flags & TRANSPORT_PUSH_FORCE)
 410                 argv[argc++] = "--force";
 411         if (flags & TRANSPORT_PUSH_DRY_RUN)
 412                 argv[argc++] = "--dry-run";
 413         if (flags & TRANSPORT_PUSH_VERBOSE)
 414                 argv[argc++] = "--verbose";
 415         argv[argc++] = transport->url;
 416         while (refspec_nr--)
 417                 argv[argc++] = *refspec++;
 418         argv[argc] = NULL;
 419         err = run_command_v_opt(argv, RUN_GIT_CMD);
 420         switch (err) {
 421         case -ERR_RUN_COMMAND_FORK:
 422                 error("unable to fork for %s", argv[0]);
 423         case -ERR_RUN_COMMAND_EXEC:
 424                 error("unable to exec %s", argv[0]);
 425                 break;
 426         case -ERR_RUN_COMMAND_WAITPID:
 427         case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 428         case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 429         case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 430                 error("%s died with strange error", argv[0]);
 431         }
 432         return !!err;
 433 }
 434
 435 static struct ref *get_refs_via_curl(struct transport *transport, int for_push)
 436 {
 437         struct strbuf buffer = STRBUF_INIT;
 438         char *data, *start, *mid;
 439         char *ref_name;
 440         char *refs_url;
 441         int i = 0;
 442
 443         struct active_request_slot *slot;
 444         struct slot_results results;
 445
 446         struct ref *refs = NULL;
 447         struct ref *ref = NULL;
 448         struct ref *last_ref = NULL;
 449
 450         struct walker *walker;
 451
 452         if (for_push)
 453                 return NULL;
 454
 455         if (!transport->data)
 456                 transport->data = get_http_walker(transport->url,
 457                                                 transport->remote);
 458
 459         walker = transport->data;
 460
 461         refs_url = xmalloc(strlen(transport->url) + 11);
 462         sprintf(refs_url, "%s/info/refs", transport->url);
 463
 464         slot = get_active_slot();
 465         slot->results = &results;
 466         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
 467         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 468         curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
 469         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
 470
 471         if (start_active_slot(slot)) {
 472                 run_active_slot(slot);
 473                 if (results.curl_result != CURLE_OK) {
 474                         strbuf_release(&buffer);
 475                         if (missing_target(&results))
 476                                 die("%s not found: did you run git update-server-info on the server?", refs_url);
 477                         else
 478                                 die("%s download error - %s", refs_url, curl_errorstr);
 479                 }
 480         } else {
 481                 strbuf_release(&buffer);
 482                 die("Unable to start HTTP request");
 483         }
 484
 485         data = buffer.buf;
 486         start = NULL;
 487         mid = data;
 488         while (i < buffer.len) {
 489                 if (!start)
 490                         start = &data[i];
 491                 if (data[i] == '\t')
 492                         mid = &data[i];
 493                 if (data[i] == '\n') {
 494                         data[i] = 0;
 495                         ref_name = mid + 1;
 496                         ref = xmalloc(sizeof(struct ref) +
 497                                       strlen(ref_name) + 1);
 498                         memset(ref, 0, sizeof(struct ref));
 499                         strcpy(ref->name, ref_name);
 500                         get_sha1_hex(start, ref->old_sha1);
 501                         if (!refs)
 502                                 refs = ref;
 503                         if (last_ref)
 504                                 last_ref->next = ref;
 505                         last_ref = ref;
 506                         start = NULL;
 507                 }
 508                 i++;
 509         }
 510
 511         strbuf_release(&buffer);
 512
 513         ref = alloc_ref("HEAD");
 514         if (!walker->fetch_ref(walker, ref) &&
 515             !resolve_remote_symref(ref, refs)) {
 516                 ref->next = refs;
 517                 refs = ref;
 518         } else {
 519                 free(ref);
 520         }
 521
 522         free(refs_url);
 523         return refs;
 524 }
 525
 526 static int fetch_objs_via_curl(struct transport *transport,
 527                                  int nr_objs, const struct ref **to_fetch)
 528 {
 529         if (!transport->data)
 530                 transport->data = get_http_walker(transport->url,
 531                                                 transport->remote);
 532         return fetch_objs_via_walker(transport, nr_objs, to_fetch);
 533 }
 534
 535 #endif
 536
 537 struct bundle_transport_data {
 538         int fd;
 539         struct bundle_header header;
 540 };
 541
 542 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 543 {
 544         struct bundle_transport_data *data = transport->data;
 545         struct ref *result = NULL;
 546         int i;
 547
 548         if (for_push)
 549                 return NULL;
 550
 551         if (data->fd > 0)
 552                 close(data->fd);
 553         data->fd = read_bundle_header(transport->url, &data->header);
 554         if (data->fd < 0)
 555                 die ("Could not read bundle '%s'.", transport->url);
 556         for (i = 0; i < data->header.references.nr; i++) {
 557                 struct ref_list_entry *e = data->header.references.list + i;
 558                 struct ref *ref = alloc_ref(e->name);
 559                 hashcpy(ref->old_sha1, e->sha1);
 560                 ref->next = result;
 561                 result = ref;
 562         }
 563         return result;
 564 }
 565
 566 static int fetch_refs_from_bundle(struct transport *transport,
 567                                int nr_heads, const struct ref **to_fetch)
 568 {
 569         struct bundle_transport_data *data = transport->data;
 570         return unbundle(&data->header, data->fd);
 571 }
 572
 573 static int close_bundle(struct transport *transport)
 574 {
 575         struct bundle_transport_data *data = transport->data;
 576         if (data->fd > 0)
 577                 close(data->fd);
 578         free(data);
 579         return 0;
 580 }
 581
 582 struct git_transport_data {
 583         unsigned thin : 1;
 584         unsigned keep : 1;
 585         unsigned followtags : 1;
 586         int depth;
 587         struct child_process *conn;
 588         int fd[2];
 589         const char *uploadpack;
 590         const char *receivepack;
 591         struct extra_have_objects extra_have;
 592 };
 593
 594 static int set_git_option(struct transport *connection,
 595                           const char *name, const char *value)
 596 {
 597         struct git_transport_data *data = connection->data;
 598         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 599                 data->uploadpack = value;
 600                 return 0;
 601         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 602                 data->receivepack = value;
 603                 return 0;
 604         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 605                 data->thin = !!value;
 606                 return 0;
 607         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 608                 data->followtags = !!value;
 609                 return 0;
 610         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 611                 data->keep = !!value;
 612                 return 0;
 613         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 614                 if (!value)
 615                         data->depth = 0;
 616                 else
 617                         data->depth = atoi(value);
 618                 return 0;
 619         }
 620         return 1;
 621 }
 622
 623 static int connect_setup(struct transport *transport, int for_push, int verbose)
 624 {
 625         struct git_transport_data *data = transport->data;
 626         data->conn = git_connect(data->fd, transport->url,
 627                                  for_push ? data->receivepack : data->uploadpack,
 628                                  verbose ? CONNECT_VERBOSE : 0);
 629         return 0;
 630 }
 631
 632 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 633 {
 634         struct git_transport_data *data = transport->data;
 635         struct ref *refs;
 636
 637         connect_setup(transport, for_push, 0);
 638         get_remote_heads(data->fd[0], &refs, 0, NULL,
 639                          for_push ? REF_NORMAL : 0, &data->extra_have);
 640
 641         return refs;
 642 }
 643
 644 static int fetch_refs_via_pack(struct transport *transport,
 645                                int nr_heads, const struct ref **to_fetch)
 646 {
 647         struct git_transport_data *data = transport->data;
 648         char **heads = xmalloc(nr_heads * sizeof(*heads));
 649         char **origh = xmalloc(nr_heads * sizeof(*origh));
 650         const struct ref *refs;
 651         char *dest = xstrdup(transport->url);
 652         struct fetch_pack_args args;
 653         int i;
 654         struct ref *refs_tmp = NULL;
 655
 656         memset(&args, 0, sizeof(args));
 657         args.uploadpack = data->uploadpack;
 658         args.keep_pack = data->keep;
 659         args.lock_pack = 1;
 660         args.use_thin_pack = data->thin;
 661         args.include_tag = data->followtags;
 662         args.verbose = (transport->verbose > 0);
 663         args.quiet = (transport->verbose < 0);
 664         args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 665         args.depth = data->depth;
 666
 667         for (i = 0; i < nr_heads; i++)
 668                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 669
 670         if (!data->conn) {
 671                 connect_setup(transport, 0, 0);
 672                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 673         }
 674
 675         refs = fetch_pack(&args, data->fd, data->conn,
 676                           refs_tmp ? refs_tmp : transport->remote_refs,
 677                           dest, nr_heads, heads, &transport->pack_lockfile);
 678         close(data->fd[0]);
 679         close(data->fd[1]);
 680         if (finish_connect(data->conn))
 681                 refs = NULL;
 682         data->conn = NULL;
 683
 684         free_refs(refs_tmp);
 685
 686         for (i = 0; i < nr_heads; i++)
 687                 free(origh[i]);
 688         free(origh);
 689         free(heads);
 690         free(dest);
 691         return (refs ? 0 : -1);
 692 }
 693
 694 static int refs_pushed(struct ref *ref)
 695 {
 696         for (; ref; ref = ref->next) {
 697                 switch(ref->status) {
 698                 case REF_STATUS_NONE:
 699                 case REF_STATUS_UPTODATE:
 700                         break;
 701                 default:
 702                         return 1;
 703                 }
 704         }
 705         return 0;
 706 }
 707
 708 static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 709 {
 710         struct refspec rs;
 711
 712         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 713                 return;
 714
 715         rs.src = ref->name;
 716         rs.dst = NULL;
 717
 718         if (!remote_find_tracking(remote, &rs)) {
 719                 if (verbose)
 720                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 721                 if (ref->deletion) {
 722                         delete_ref(rs.dst, NULL, 0);
 723                 } else
 724                         update_ref("update by push", rs.dst,
 725                                         ref->new_sha1, NULL, 0, 0);
 726                 free(rs.dst);
 727         }
 728 }
 729
 730 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 731
 732 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg)
 733 {
 734         fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 735         if (from)
 736                 fprintf(stderr, "%s -> %s", prettify_ref(from), prettify_ref(to));
 737         else
 738                 fputs(prettify_ref(to), stderr);
 739         if (msg) {
 740                 fputs(" (", stderr);
 741                 fputs(msg, stderr);
 742                 fputc(')', stderr);
 743         }
 744         fputc('\n', stderr);
 745 }
 746
 747 static const char *status_abbrev(unsigned char sha1[20])
 748 {
 749         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 750 }
 751
 752 static void print_ok_ref_status(struct ref *ref)
 753 {
 754         if (ref->deletion)
 755                 print_ref_status('-', "[deleted]", ref, NULL, NULL);
 756         else if (is_null_sha1(ref->old_sha1))
 757                 print_ref_status('*',
 758                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 759                           "[new branch]"),
 760                         ref, ref->peer_ref, NULL);
 761         else {
 762                 char quickref[84];
 763                 char type;
 764                 const char *msg;
 765
 766                 strcpy(quickref, status_abbrev(ref->old_sha1));
 767                 if (ref->nonfastforward) {
 768                         strcat(quickref, "...");
 769                         type = '+';
 770                         msg = "forced update";
 771                 } else {
 772                         strcat(quickref, "..");
 773                         type = ' ';
 774                         msg = NULL;
 775                 }
 776                 strcat(quickref, status_abbrev(ref->new_sha1));
 777
 778                 print_ref_status(type, quickref, ref, ref->peer_ref, msg);
 779         }
 780 }
 781
 782 static int print_one_push_status(struct ref *ref, const char *dest, int count)
 783 {
 784         if (!count)
 785                 fprintf(stderr, "To %s\n", dest);
 786
 787         switch(ref->status) {
 788         case REF_STATUS_NONE:
 789                 print_ref_status('X', "[no match]", ref, NULL, NULL);
 790                 break;
 791         case REF_STATUS_REJECT_NODELETE:
 792                 print_ref_status('!', "[rejected]", ref, NULL,
 793                                 "remote does not support deleting refs");
 794                 break;
 795         case REF_STATUS_UPTODATE:
 796                 print_ref_status('=', "[up to date]", ref,
 797                                 ref->peer_ref, NULL);
 798                 break;
 799         case REF_STATUS_REJECT_NONFASTFORWARD:
 800                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 801                                 "non-fast forward");
 802                 break;
 803         case REF_STATUS_REMOTE_REJECT:
 804                 print_ref_status('!', "[remote rejected]", ref,
 805                                 ref->deletion ? NULL : ref->peer_ref,
 806                                 ref->remote_status);
 807                 break;
 808         case REF_STATUS_EXPECTING_REPORT:
 809                 print_ref_status('!', "[remote failure]", ref,
 810                                 ref->deletion ? NULL : ref->peer_ref,
 811                                 "remote failed to report status");
 812                 break;
 813         case REF_STATUS_OK:
 814                 print_ok_ref_status(ref);
 815                 break;
 816         }
 817
 818         return 1;
 819 }
 820
 821 static void print_push_status(const char *dest, struct ref *refs, int verbose)
 822 {
 823         struct ref *ref;
 824         int n = 0;
 825
 826         if (verbose) {
 827                 for (ref = refs; ref; ref = ref->next)
 828                         if (ref->status == REF_STATUS_UPTODATE)
 829                                 n += print_one_push_status(ref, dest, n);
 830         }
 831
 832         for (ref = refs; ref; ref = ref->next)
 833                 if (ref->status == REF_STATUS_OK)
 834                         n += print_one_push_status(ref, dest, n);
 835
 836         for (ref = refs; ref; ref = ref->next) {
 837                 if (ref->status != REF_STATUS_NONE &&
 838                     ref->status != REF_STATUS_UPTODATE &&
 839                     ref->status != REF_STATUS_OK)
 840                         n += print_one_push_status(ref, dest, n);
 841         }
 842 }
 843
 844 static void verify_remote_names(int nr_heads, const char **heads)
 845 {
 846         int i;
 847
 848         for (i = 0; i < nr_heads; i++) {
 849                 const char *local = heads[i];
 850                 const char *remote = strrchr(heads[i], ':');
 851
 852                 if (*local == '+')
 853                         local++;
 854
 855                 /* A matching refspec is okay.  */
 856                 if (remote == local && remote[1] == '\0')
 857                         continue;
 858
 859                 remote = remote ? (remote + 1) : local;
 860                 switch (check_ref_format(remote)) {
 861                 case 0: /* ok */
 862                 case CHECK_REF_FORMAT_ONELEVEL:
 863                         /* ok but a single level -- that is fine for
 864                          * a match pattern.
 865                          */
 866                 case CHECK_REF_FORMAT_WILDCARD:
 867                         /* ok but ends with a pattern-match character */
 868                         continue;
 869                 }
 870                 die("remote part of refspec is not a valid name in %s",
 871                     heads[i]);
 872         }
 873 }
 874
 875 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 876 {
 877         struct git_transport_data *data = transport->data;
 878         struct send_pack_args args;
 879         int ret;
 880
 881         if (!data->conn) {
 882                 struct ref *tmp_refs;
 883                 connect_setup(transport, 1, 0);
 884
 885                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 886                                  NULL);
 887         }
 888
 889         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 890         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 891         args.use_thin_pack = data->thin;
 892         args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 893         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 894
 895         ret = send_pack(&args, data->fd, data->conn, remote_refs,
 896                         &data->extra_have);
 897
 898         close(data->fd[1]);
 899         close(data->fd[0]);
 900         ret |= finish_connect(data->conn);
 901         data->conn = NULL;
 902
 903         return ret;
 904 }
 905
 906 static int disconnect_git(struct transport *transport)
 907 {
 908         struct git_transport_data *data = transport->data;
 909         if (data->conn) {
 910                 packet_flush(data->fd[1]);
 911                 close(data->fd[0]);
 912                 close(data->fd[1]);
 913                 finish_connect(data->conn);
 914         }
 915
 916         free(data);
 917         return 0;
 918 }
 919
 920 static int is_local(const char *url)
 921 {
 922         const char *colon = strchr(url, ':');
 923         const char *slash = strchr(url, '/');
 924         return !colon || (slash && slash < colon) ||
 925                 has_dos_drive_prefix(url);
 926 }
 927
 928 static int is_file(const char *url)
 929 {
 930         struct stat buf;
 931         if (stat(url, &buf))
 932                 return 0;
 933         return S_ISREG(buf.st_mode);
 934 }
 935
 936 struct transport *transport_get(struct remote *remote, const char *url)
 937 {
 938         struct transport *ret = xcalloc(1, sizeof(*ret));
 939
 940         ret->remote = remote;
 941         ret->url = url;
 942
 943         if (!prefixcmp(url, "rsync:")) {
 944                 ret->get_refs_list = get_refs_via_rsync;
 945                 ret->fetch = fetch_objs_via_rsync;
 946                 ret->push = rsync_transport_push;
 947
 948         } else if (!prefixcmp(url, "http://")
 949                 || !prefixcmp(url, "https://")
 950                 || !prefixcmp(url, "ftp://")) {
 951 #ifdef NO_CURL
 952                 error("git was compiled without libcurl support.");
 953 #else
 954                 ret->get_refs_list = get_refs_via_curl;
 955                 ret->fetch = fetch_objs_via_curl;
 956                 ret->push = curl_transport_push;
 957 #endif
 958                 ret->disconnect = disconnect_walker;
 959
 960         } else if (is_local(url) && is_file(url)) {
 961                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 962                 ret->data = data;
 963                 ret->get_refs_list = get_refs_from_bundle;
 964                 ret->fetch = fetch_refs_from_bundle;
 965                 ret->disconnect = close_bundle;
 966
 967         } else {
 968                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 969                 ret->data = data;
 970                 ret->set_option = set_git_option;
 971                 ret->get_refs_list = get_refs_via_connect;
 972                 ret->fetch = fetch_refs_via_pack;
 973                 ret->push_refs = git_transport_push;
 974                 ret->disconnect = disconnect_git;
 975
 976                 data->thin = 1;
 977                 data->conn = NULL;
 978                 data->uploadpack = "git-upload-pack";
 979                 if (remote && remote->uploadpack)
 980                         data->uploadpack = remote->uploadpack;
 981                 data->receivepack = "git-receive-pack";
 982                 if (remote && remote->receivepack)
 983                         data->receivepack = remote->receivepack;
 984         }
 985
 986         return ret;
 987 }
 988
 989 int transport_set_option(struct transport *transport,
 990                          const char *name, const char *value)
 991 {
 992         if (transport->set_option)
 993                 return transport->set_option(transport, name, value);
 994         return 1;
 995 }
 996
 997 int transport_push(struct transport *transport,
 998                    int refspec_nr, const char **refspec, int flags)
 999 {
1000         verify_remote_names(refspec_nr, refspec);
1001
1002         if (transport->push)
1003                 return transport->push(transport, refspec_nr, refspec, flags);
1004         if (transport->push_refs) {
1005                 struct ref *remote_refs =
1006                         transport->get_refs_list(transport, 1);
1007                 struct ref **remote_tail;
1008                 struct ref *local_refs = get_local_heads();
1009                 int match_flags = MATCH_REFS_NONE;
1010                 int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1011                 int ret;
1012
1013                 if (flags & TRANSPORT_PUSH_ALL)
1014                         match_flags |= MATCH_REFS_ALL;
1015                 if (flags & TRANSPORT_PUSH_MIRROR)
1016                         match_flags |= MATCH_REFS_MIRROR;
1017
1018                 remote_tail = &remote_refs;
1019                 while (*remote_tail)
1020                         remote_tail = &((*remote_tail)->next);
1021                 if (match_refs(local_refs, remote_refs, &remote_tail,
1022                                refspec_nr, refspec, match_flags)) {
1023                         return -1;
1024                 }
1025
1026                 ret = transport->push_refs(transport, remote_refs, flags);
1027
1028                 print_push_status(transport->url, remote_refs, verbose);
1029
1030                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1031                         struct ref *ref;
1032                         for (ref = remote_refs; ref; ref = ref->next)
1033                                 update_tracking_ref(transport->remote, ref, verbose);
1034                 }
1035
1036                 if (!ret && !refs_pushed(remote_refs))
1037                         fprintf(stderr, "Everything up-to-date\n");
1038                 return ret;
1039         }
1040         return 1;
1041 }
1042
1043 const struct ref *transport_get_remote_refs(struct transport *transport)
1044 {
1045         if (!transport->remote_refs)
1046                 transport->remote_refs = transport->get_refs_list(transport, 0);
1047         return transport->remote_refs;
1048 }
1049
1050 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
1051 {
1052         int rc;
1053         int nr_heads = 0, nr_alloc = 0;
1054         const struct ref **heads = NULL;
1055         const struct ref *rm;
1056
1057         for (rm = refs; rm; rm = rm->next) {
1058                 if (rm->peer_ref &&
1059                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1060                         continue;
1061                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1062                 heads[nr_heads++] = rm;
1063         }
1064
1065         rc = transport->fetch(transport, nr_heads, heads);
1066         free(heads);
1067         return rc;
1068 }
1069
1070 void transport_unlock_pack(struct transport *transport)
1071 {
1072         if (transport->pack_lockfile) {
1073                 unlink_or_warn(transport->pack_lockfile);
1074                 free(transport->pack_lockfile);
1075                 transport->pack_lockfile = NULL;
1076         }
1077 }
1078
1079 int transport_disconnect(struct transport *transport)
1080 {
1081         int ret = 0;
1082         if (transport->disconnect)
1083                 ret = transport->disconnect(transport);
1084         free(transport);
1085         return ret;
1086 }
1087
1088 /*
1089  * Strip username (and password) from an url and return
1090  * it in a newly allocated string.
1091  */
1092 char *transport_anonymize_url(const char *url)
1093 {
1094         char *anon_url, *scheme_prefix, *anon_part;
1095         size_t anon_len, prefix_len = 0;
1096
1097         anon_part = strchr(url, '@');
1098         if (is_local(url) || !anon_part)
1099                 goto literal_copy;
1100
1101         anon_len = strlen(++anon_part);
1102         scheme_prefix = strstr(url, "://");
1103         if (!scheme_prefix) {
1104                 if (!strchr(anon_part, ':'))
1105                         /* cannot be "me@there:/path/name" */
1106                         goto literal_copy;
1107         } else {
1108                 const char *cp;
1109                 /* make sure scheme is reasonable */
1110                 for (cp = url; cp < scheme_prefix; cp++) {
1111                         switch (*cp) {
1112                                 /* RFC 1738 2.1 */
1113                         case '+': case '.': case '-':
1114                                 break; /* ok */
1115                         default:
1116                                 if (isalnum(*cp))
1117                                         break;
1118                                 /* it isn't */
1119                                 goto literal_copy;
1120                         }
1121                 }
1122                 /* @ past the first slash does not count */
1123                 cp = strchr(scheme_prefix + 3, '/');
1124                 if (cp && cp < anon_part)
1125                         goto literal_copy;
1126                 prefix_len = scheme_prefix - url + 3;
1127         }
1128         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1129         memcpy(anon_url, url, prefix_len);
1130         memcpy(anon_url + prefix_len, anon_part, anon_len);
1131         return anon_url;
1132 literal_copy:
1133         return xstrdup(url);
1134 }