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