transport.c

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