git.oblomov.eu Git - 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_errno ("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_errno ("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
 400         if (flags & TRANSPORT_PUSH_MIRROR)
 401                 return error("http transport does not support mirror mode");
 402
 403         argv = xmalloc((refspec_nr + 12) * sizeof(char *));
 404         argv[0] = "http-push";
 405         argc = 1;
 406         if (flags & TRANSPORT_PUSH_ALL)
 407                 argv[argc++] = "--all";
 408         if (flags & TRANSPORT_PUSH_FORCE)
 409                 argv[argc++] = "--force";
 410         if (flags & TRANSPORT_PUSH_DRY_RUN)
 411                 argv[argc++] = "--dry-run";
 412         if (flags & TRANSPORT_PUSH_VERBOSE)
 413                 argv[argc++] = "--verbose";
 414         argv[argc++] = transport->url;
 415         while (refspec_nr--)
 416                 argv[argc++] = *refspec++;
 417         argv[argc] = NULL;
 418         return !!run_command_v_opt(argv, RUN_GIT_CMD);
 419 }
 420
 421 static struct ref *get_refs_via_curl(struct transport *transport, int for_push)
 422 {
 423         struct strbuf buffer = STRBUF_INIT;
 424         char *data, *start, *mid;
 425         char *ref_name;
 426         char *refs_url;
 427         int i = 0;
 428         int http_ret;
 429
 430         struct ref *refs = NULL;
 431         struct ref *ref = NULL;
 432         struct ref *last_ref = NULL;
 433
 434         struct walker *walker;
 435
 436         if (for_push)
 437                 return NULL;
 438
 439         if (!transport->data)
 440                 transport->data = get_http_walker(transport->url,
 441                                                 transport->remote);
 442
 443         walker = transport->data;
 444
 445         refs_url = xmalloc(strlen(transport->url) + 11);
 446         sprintf(refs_url, "%s/info/refs", transport->url);
 447
 448         http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
 449         switch (http_ret) {
 450         case HTTP_OK:
 451                 break;
 452         case HTTP_MISSING_TARGET:
 453                 die("%s not found: did you run git update-server-info on the"
 454                     " server?", refs_url);
 455         default:
 456                 http_error(refs_url, http_ret);
 457                 die("HTTP request failed");
 458         }
 459
 460         data = buffer.buf;
 461         start = NULL;
 462         mid = data;
 463         while (i < buffer.len) {
 464                 if (!start)
 465                         start = &data[i];
 466                 if (data[i] == '\t')
 467                         mid = &data[i];
 468                 if (data[i] == '\n') {
 469                         data[i] = 0;
 470                         ref_name = mid + 1;
 471                         ref = xmalloc(sizeof(struct ref) +
 472                                       strlen(ref_name) + 1);
 473                         memset(ref, 0, sizeof(struct ref));
 474                         strcpy(ref->name, ref_name);
 475                         get_sha1_hex(start, ref->old_sha1);
 476                         if (!refs)
 477                                 refs = ref;
 478                         if (last_ref)
 479                                 last_ref->next = ref;
 480                         last_ref = ref;
 481                         start = NULL;
 482                 }
 483                 i++;
 484         }
 485
 486         strbuf_release(&buffer);
 487
 488         ref = alloc_ref("HEAD");
 489         if (!walker->fetch_ref(walker, ref) &&
 490             !resolve_remote_symref(ref, refs)) {
 491                 ref->next = refs;
 492                 refs = ref;
 493         } else {
 494                 free(ref);
 495         }
 496
 497         strbuf_release(&buffer);
 498         free(refs_url);
 499         return refs;
 500 }
 501
 502 static int fetch_objs_via_curl(struct transport *transport,
 503                                  int nr_objs, const struct ref **to_fetch)
 504 {
 505         if (!transport->data)
 506                 transport->data = get_http_walker(transport->url,
 507                                                 transport->remote);
 508         return fetch_objs_via_walker(transport, nr_objs, to_fetch);
 509 }
 510
 511 #endif
 512
 513 struct bundle_transport_data {
 514         int fd;
 515         struct bundle_header header;
 516 };
 517
 518 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 519 {
 520         struct bundle_transport_data *data = transport->data;
 521         struct ref *result = NULL;
 522         int i;
 523
 524         if (for_push)
 525                 return NULL;
 526
 527         if (data->fd > 0)
 528                 close(data->fd);
 529         data->fd = read_bundle_header(transport->url, &data->header);
 530         if (data->fd < 0)
 531                 die ("Could not read bundle '%s'.", transport->url);
 532         for (i = 0; i < data->header.references.nr; i++) {
 533                 struct ref_list_entry *e = data->header.references.list + i;
 534                 struct ref *ref = alloc_ref(e->name);
 535                 hashcpy(ref->old_sha1, e->sha1);
 536                 ref->next = result;
 537                 result = ref;
 538         }
 539         return result;
 540 }
 541
 542 static int fetch_refs_from_bundle(struct transport *transport,
 543                                int nr_heads, const struct ref **to_fetch)
 544 {
 545         struct bundle_transport_data *data = transport->data;
 546         return unbundle(&data->header, data->fd);
 547 }
 548
 549 static int close_bundle(struct transport *transport)
 550 {
 551         struct bundle_transport_data *data = transport->data;
 552         if (data->fd > 0)
 553                 close(data->fd);
 554         free(data);
 555         return 0;
 556 }
 557
 558 struct git_transport_data {
 559         unsigned thin : 1;
 560         unsigned keep : 1;
 561         unsigned followtags : 1;
 562         int depth;
 563         struct child_process *conn;
 564         int fd[2];
 565         const char *uploadpack;
 566         const char *receivepack;
 567         struct extra_have_objects extra_have;
 568 };
 569
 570 static int set_git_option(struct transport *connection,
 571                           const char *name, const char *value)
 572 {
 573         struct git_transport_data *data = connection->data;
 574         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 575                 data->uploadpack = value;
 576                 return 0;
 577         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 578                 data->receivepack = value;
 579                 return 0;
 580         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 581                 data->thin = !!value;
 582                 return 0;
 583         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 584                 data->followtags = !!value;
 585                 return 0;
 586         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 587                 data->keep = !!value;
 588                 return 0;
 589         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 590                 if (!value)
 591                         data->depth = 0;
 592                 else
 593                         data->depth = atoi(value);
 594                 return 0;
 595         }
 596         return 1;
 597 }
 598
 599 static int connect_setup(struct transport *transport, int for_push, int verbose)
 600 {
 601         struct git_transport_data *data = transport->data;
 602         data->conn = git_connect(data->fd, transport->url,
 603                                  for_push ? data->receivepack : data->uploadpack,
 604                                  verbose ? CONNECT_VERBOSE : 0);
 605         return 0;
 606 }
 607
 608 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 609 {
 610         struct git_transport_data *data = transport->data;
 611         struct ref *refs;
 612
 613         connect_setup(transport, for_push, 0);
 614         get_remote_heads(data->fd[0], &refs, 0, NULL,
 615                          for_push ? REF_NORMAL : 0, &data->extra_have);
 616
 617         return refs;
 618 }
 619
 620 static int fetch_refs_via_pack(struct transport *transport,
 621                                int nr_heads, const struct ref **to_fetch)
 622 {
 623         struct git_transport_data *data = transport->data;
 624         char **heads = xmalloc(nr_heads * sizeof(*heads));
 625         char **origh = xmalloc(nr_heads * sizeof(*origh));
 626         const struct ref *refs;
 627         char *dest = xstrdup(transport->url);
 628         struct fetch_pack_args args;
 629         int i;
 630         struct ref *refs_tmp = NULL;
 631
 632         memset(&args, 0, sizeof(args));
 633         args.uploadpack = data->uploadpack;
 634         args.keep_pack = data->keep;
 635         args.lock_pack = 1;
 636         args.use_thin_pack = data->thin;
 637         args.include_tag = data->followtags;
 638         args.verbose = (transport->verbose > 0);
 639         args.quiet = (transport->verbose < 0);
 640         args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 641         args.depth = data->depth;
 642
 643         for (i = 0; i < nr_heads; i++)
 644                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 645
 646         if (!data->conn) {
 647                 connect_setup(transport, 0, 0);
 648                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 649         }
 650
 651         refs = fetch_pack(&args, data->fd, data->conn,
 652                           refs_tmp ? refs_tmp : transport->remote_refs,
 653                           dest, nr_heads, heads, &transport->pack_lockfile);
 654         close(data->fd[0]);
 655         close(data->fd[1]);
 656         if (finish_connect(data->conn))
 657                 refs = NULL;
 658         data->conn = NULL;
 659
 660         free_refs(refs_tmp);
 661
 662         for (i = 0; i < nr_heads; i++)
 663                 free(origh[i]);
 664         free(origh);
 665         free(heads);
 666         free(dest);
 667         return (refs ? 0 : -1);
 668 }
 669
 670 static int push_had_errors(struct ref *ref)
 671 {
 672         for (; ref; ref = ref->next) {
 673                 switch (ref->status) {
 674                 case REF_STATUS_NONE:
 675                 case REF_STATUS_UPTODATE:
 676                 case REF_STATUS_OK:
 677                         break;
 678                 default:
 679                         return 1;
 680                 }
 681         }
 682         return 0;
 683 }
 684
 685 static int refs_pushed(struct ref *ref)
 686 {
 687         for (; ref; ref = ref->next) {
 688                 switch(ref->status) {
 689                 case REF_STATUS_NONE:
 690                 case REF_STATUS_UPTODATE:
 691                         break;
 692                 default:
 693                         return 1;
 694                 }
 695         }
 696         return 0;
 697 }
 698
 699 static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 700 {
 701         struct refspec rs;
 702
 703         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 704                 return;
 705
 706         rs.src = ref->name;
 707         rs.dst = NULL;
 708
 709         if (!remote_find_tracking(remote, &rs)) {
 710                 if (verbose)
 711                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 712                 if (ref->deletion) {
 713                         delete_ref(rs.dst, NULL, 0);
 714                 } else
 715                         update_ref("update by push", rs.dst,
 716                                         ref->new_sha1, NULL, 0, 0);
 717                 free(rs.dst);
 718         }
 719 }
 720
 721 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 722
 723 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 724 {
 725         if (porcelain) {
 726                 if (from)
 727                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 728                 else
 729                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
 730                 if (msg)
 731                         fprintf(stdout, "%s (%s)\n", summary, msg);
 732                 else
 733                         fprintf(stdout, "%s\n", summary);
 734         } else {
 735                 fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 736                 if (from)
 737                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 738                 else
 739                         fputs(prettify_refname(to->name), stderr);
 740                 if (msg) {
 741                         fputs(" (", stderr);
 742                         fputs(msg, stderr);
 743                         fputc(')', stderr);
 744                 }
 745                 fputc('\n', stderr);
 746         }
 747 }
 748
 749 static const char *status_abbrev(unsigned char sha1[20])
 750 {
 751         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 752 }
 753
 754 static void print_ok_ref_status(struct ref *ref, int porcelain)
 755 {
 756         if (ref->deletion)
 757                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 758         else if (is_null_sha1(ref->old_sha1))
 759                 print_ref_status('*',
 760                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 761                         "[new branch]"),
 762                         ref, ref->peer_ref, NULL, porcelain);
 763         else {
 764                 char quickref[84];
 765                 char type;
 766                 const char *msg;
 767
 768                 strcpy(quickref, status_abbrev(ref->old_sha1));
 769                 if (ref->nonfastforward) {
 770                         strcat(quickref, "...");
 771                         type = '+';
 772                         msg = "forced update";
 773                 } else {
 774                         strcat(quickref, "..");
 775                         type = ' ';
 776                         msg = NULL;
 777                 }
 778                 strcat(quickref, status_abbrev(ref->new_sha1));
 779
 780                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 781         }
 782 }
 783
 784 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 785 {
 786         if (!count)
 787                 fprintf(stderr, "To %s\n", dest);
 788
 789         switch(ref->status) {
 790         case REF_STATUS_NONE:
 791                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 792                 break;
 793         case REF_STATUS_REJECT_NODELETE:
 794                 print_ref_status('!', "[rejected]", ref, NULL,
 795                                                  "remote does not support deleting refs", porcelain);
 796                 break;
 797         case REF_STATUS_UPTODATE:
 798                 print_ref_status('=', "[up to date]", ref,
 799                                                  ref->peer_ref, NULL, porcelain);
 800                 break;
 801         case REF_STATUS_REJECT_NONFASTFORWARD:
 802                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 803                                                  "non-fast forward", porcelain);
 804                 break;
 805         case REF_STATUS_REMOTE_REJECT:
 806                 print_ref_status('!', "[remote rejected]", ref,
 807                                                  ref->deletion ? NULL : ref->peer_ref,
 808                                                  ref->remote_status, porcelain);
 809                 break;
 810         case REF_STATUS_EXPECTING_REPORT:
 811                 print_ref_status('!', "[remote failure]", ref,
 812                                                  ref->deletion ? NULL : ref->peer_ref,
 813                                                  "remote failed to report status", porcelain);
 814                 break;
 815         case REF_STATUS_OK:
 816                 print_ok_ref_status(ref, porcelain);
 817                 break;
 818         }
 819
 820         return 1;
 821 }
 822
 823 static void print_push_status(const char *dest, struct ref *refs,
 824                               int verbose, int porcelain, int * nonfastforward)
 825 {
 826         struct ref *ref;
 827         int n = 0;
 828
 829         if (verbose) {
 830                 for (ref = refs; ref; ref = ref->next)
 831                         if (ref->status == REF_STATUS_UPTODATE)
 832                                 n += print_one_push_status(ref, dest, n, porcelain);
 833         }
 834
 835         for (ref = refs; ref; ref = ref->next)
 836                 if (ref->status == REF_STATUS_OK)
 837                         n += print_one_push_status(ref, dest, n, porcelain);
 838
 839         *nonfastforward = 0;
 840         for (ref = refs; ref; ref = ref->next) {
 841                 if (ref->status != REF_STATUS_NONE &&
 842                     ref->status != REF_STATUS_UPTODATE &&
 843                     ref->status != REF_STATUS_OK)
 844                         n += print_one_push_status(ref, dest, n, porcelain);
 845                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 846                         *nonfastforward = 1;
 847         }
 848 }
 849
 850 static void verify_remote_names(int nr_heads, const char **heads)
 851 {
 852         int i;
 853
 854         for (i = 0; i < nr_heads; i++) {
 855                 const char *local = heads[i];
 856                 const char *remote = strrchr(heads[i], ':');
 857
 858                 if (*local == '+')
 859                         local++;
 860
 861                 /* A matching refspec is okay.  */
 862                 if (remote == local && remote[1] == '\0')
 863                         continue;
 864
 865                 remote = remote ? (remote + 1) : local;
 866                 switch (check_ref_format(remote)) {
 867                 case 0: /* ok */
 868                 case CHECK_REF_FORMAT_ONELEVEL:
 869                         /* ok but a single level -- that is fine for
 870                          * a match pattern.
 871                          */
 872                 case CHECK_REF_FORMAT_WILDCARD:
 873                         /* ok but ends with a pattern-match character */
 874                         continue;
 875                 }
 876                 die("remote part of refspec is not a valid name in %s",
 877                     heads[i]);
 878         }
 879 }
 880
 881 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 882 {
 883         struct git_transport_data *data = transport->data;
 884         struct send_pack_args args;
 885         int ret;
 886
 887         if (!data->conn) {
 888                 struct ref *tmp_refs;
 889                 connect_setup(transport, 1, 0);
 890
 891                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 892                                  NULL);
 893         }
 894
 895         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 896         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 897         args.use_thin_pack = data->thin;
 898         args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 899         args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
 900         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 901
 902         ret = send_pack(&args, data->fd, data->conn, remote_refs,
 903                         &data->extra_have);
 904
 905         close(data->fd[1]);
 906         close(data->fd[0]);
 907         ret |= finish_connect(data->conn);
 908         data->conn = NULL;
 909
 910         return ret;
 911 }
 912
 913 static int disconnect_git(struct transport *transport)
 914 {
 915         struct git_transport_data *data = transport->data;
 916         if (data->conn) {
 917                 packet_flush(data->fd[1]);
 918                 close(data->fd[0]);
 919                 close(data->fd[1]);
 920                 finish_connect(data->conn);
 921         }
 922
 923         free(data);
 924         return 0;
 925 }
 926
 927 static int is_local(const char *url)
 928 {
 929         const char *colon = strchr(url, ':');
 930         const char *slash = strchr(url, '/');
 931         return !colon || (slash && slash < colon) ||
 932                 has_dos_drive_prefix(url);
 933 }
 934
 935 static int is_file(const char *url)
 936 {
 937         struct stat buf;
 938         if (stat(url, &buf))
 939                 return 0;
 940         return S_ISREG(buf.st_mode);
 941 }
 942
 943 struct transport *transport_get(struct remote *remote, const char *url)
 944 {
 945         struct transport *ret = xcalloc(1, sizeof(*ret));
 946
 947         ret->remote = remote;
 948         ret->url = url;
 949
 950         if (!prefixcmp(url, "rsync:")) {
 951                 ret->get_refs_list = get_refs_via_rsync;
 952                 ret->fetch = fetch_objs_via_rsync;
 953                 ret->push = rsync_transport_push;
 954
 955         } else if (!prefixcmp(url, "http://")
 956                 || !prefixcmp(url, "https://")
 957                 || !prefixcmp(url, "ftp://")) {
 958 #ifdef NO_CURL
 959                 error("git was compiled without libcurl support.");
 960 #else
 961                 ret->get_refs_list = get_refs_via_curl;
 962                 ret->fetch = fetch_objs_via_curl;
 963                 ret->push = curl_transport_push;
 964 #endif
 965                 ret->disconnect = disconnect_walker;
 966
 967         } else if (is_local(url) && is_file(url)) {
 968                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 969                 ret->data = data;
 970                 ret->get_refs_list = get_refs_from_bundle;
 971                 ret->fetch = fetch_refs_from_bundle;
 972                 ret->disconnect = close_bundle;
 973
 974         } else {
 975                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 976                 ret->data = data;
 977                 ret->set_option = set_git_option;
 978                 ret->get_refs_list = get_refs_via_connect;
 979                 ret->fetch = fetch_refs_via_pack;
 980                 ret->push_refs = git_transport_push;
 981                 ret->disconnect = disconnect_git;
 982
 983                 data->thin = 1;
 984                 data->conn = NULL;
 985                 data->uploadpack = "git-upload-pack";
 986                 if (remote && remote->uploadpack)
 987                         data->uploadpack = remote->uploadpack;
 988                 data->receivepack = "git-receive-pack";
 989                 if (remote && remote->receivepack)
 990                         data->receivepack = remote->receivepack;
 991         }
 992
 993         return ret;
 994 }
 995
 996 int transport_set_option(struct transport *transport,
 997                          const char *name, const char *value)
 998 {
 999         if (transport->set_option)
1000                 return transport->set_option(transport, name, value);
1001         return 1;
1002 }
1003
1004 int transport_push(struct transport *transport,
1005                    int refspec_nr, const char **refspec, int flags,
1006                    int * nonfastforward)
1007 {
1008         verify_remote_names(refspec_nr, refspec);
1009
1010         if (transport->push)
1011                 return transport->push(transport, refspec_nr, refspec, flags);
1012         if (transport->push_refs) {
1013                 struct ref *remote_refs =
1014                         transport->get_refs_list(transport, 1);
1015                 struct ref *local_refs = get_local_heads();
1016                 int match_flags = MATCH_REFS_NONE;
1017                 int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1018                 int quiet = flags & TRANSPORT_PUSH_QUIET;
1019                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1020                 int ret;
1021
1022                 if (flags & TRANSPORT_PUSH_ALL)
1023                         match_flags |= MATCH_REFS_ALL;
1024                 if (flags & TRANSPORT_PUSH_MIRROR)
1025                         match_flags |= MATCH_REFS_MIRROR;
1026
1027                 if (match_refs(local_refs, &remote_refs,
1028                                refspec_nr, refspec, match_flags)) {
1029                         return -1;
1030                 }
1031
1032                 ret = transport->push_refs(transport, remote_refs, flags);
1033
1034                 if (!quiet || push_had_errors(remote_refs))
1035                         print_push_status(transport->url, remote_refs,
1036                                         verbose | porcelain, porcelain,
1037                                         nonfastforward);
1038
1039                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1040                         struct ref *ref;
1041                         for (ref = remote_refs; ref; ref = ref->next)
1042                                 update_tracking_ref(transport->remote, ref, verbose);
1043                 }
1044
1045                 if (!ret && !refs_pushed(remote_refs))
1046                         fprintf(stderr, "Everything up-to-date\n");
1047                 return ret;
1048         }
1049         return 1;
1050 }
1051
1052 const struct ref *transport_get_remote_refs(struct transport *transport)
1053 {
1054         if (!transport->remote_refs)
1055                 transport->remote_refs = transport->get_refs_list(transport, 0);
1056         return transport->remote_refs;
1057 }
1058
1059 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
1060 {
1061         int rc;
1062         int nr_heads = 0, nr_alloc = 0;
1063         const struct ref **heads = NULL;
1064         const struct ref *rm;
1065
1066         for (rm = refs; rm; rm = rm->next) {
1067                 if (rm->peer_ref &&
1068                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1069                         continue;
1070                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1071                 heads[nr_heads++] = rm;
1072         }
1073
1074         rc = transport->fetch(transport, nr_heads, heads);
1075         free(heads);
1076         return rc;
1077 }
1078
1079 void transport_unlock_pack(struct transport *transport)
1080 {
1081         if (transport->pack_lockfile) {
1082                 unlink_or_warn(transport->pack_lockfile);
1083                 free(transport->pack_lockfile);
1084                 transport->pack_lockfile = NULL;
1085         }
1086 }
1087
1088 int transport_disconnect(struct transport *transport)
1089 {
1090         int ret = 0;
1091         if (transport->disconnect)
1092                 ret = transport->disconnect(transport);
1093         free(transport);
1094         return ret;
1095 }
1096
1097 /*
1098  * Strip username (and password) from an url and return
1099  * it in a newly allocated string.
1100  */
1101 char *transport_anonymize_url(const char *url)
1102 {
1103         char *anon_url, *scheme_prefix, *anon_part;
1104         size_t anon_len, prefix_len = 0;
1105
1106         anon_part = strchr(url, '@');
1107         if (is_local(url) || !anon_part)
1108                 goto literal_copy;
1109
1110         anon_len = strlen(++anon_part);
1111         scheme_prefix = strstr(url, "://");
1112         if (!scheme_prefix) {
1113                 if (!strchr(anon_part, ':'))
1114                         /* cannot be "me@there:/path/name" */
1115                         goto literal_copy;
1116         } else {
1117                 const char *cp;
1118                 /* make sure scheme is reasonable */
1119                 for (cp = url; cp < scheme_prefix; cp++) {
1120                         switch (*cp) {
1121                                 /* RFC 1738 2.1 */
1122                         case '+': case '.': case '-':
1123                                 break; /* ok */
1124                         default:
1125                                 if (isalnum(*cp))
1126                                         break;
1127                                 /* it isn't */
1128                                 goto literal_copy;
1129                         }
1130                 }
1131                 /* @ past the first slash does not count */
1132                 cp = strchr(scheme_prefix + 3, '/');
1133                 if (cp && cp < anon_part)
1134                         goto literal_copy;
1135                 prefix_len = scheme_prefix - url + 3;
1136         }
1137         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1138         memcpy(anon_url, url, prefix_len);
1139         memcpy(anon_url + prefix_len, anon_part, anon_len);
1140         return anon_url;
1141 literal_copy:
1142         return xstrdup(url);
1143 }