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

   1 #include "cache.h"
   2 #include "transport.h"
   3 #include "run-command.h"
   4 #include "pkt-line.h"
   5 #include "fetch-pack.h"
   6 #include "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         int err;
 358
 359         if (flags & TRANSPORT_PUSH_MIRROR)
 360                 return error("http transport does not support mirror mode");
 361
 362         argv = xmalloc((refspec_nr + 12) * sizeof(char *));
 363         argv[0] = "http-push";
 364         argc = 1;
 365         if (flags & TRANSPORT_PUSH_ALL)
 366                 argv[argc++] = "--all";
 367         if (flags & TRANSPORT_PUSH_FORCE)
 368                 argv[argc++] = "--force";
 369         if (flags & TRANSPORT_PUSH_DRY_RUN)
 370                 argv[argc++] = "--dry-run";
 371         if (flags & TRANSPORT_PUSH_VERBOSE)
 372                 argv[argc++] = "--verbose";
 373         argv[argc++] = transport->url;
 374         while (refspec_nr--)
 375                 argv[argc++] = *refspec++;
 376         argv[argc] = NULL;
 377         err = run_command_v_opt(argv, RUN_GIT_CMD);
 378         switch (err) {
 379         case -ERR_RUN_COMMAND_FORK:
 380                 error("unable to fork for %s", argv[0]);
 381         case -ERR_RUN_COMMAND_EXEC:
 382                 error("unable to exec %s", argv[0]);
 383                 break;
 384         case -ERR_RUN_COMMAND_WAITPID:
 385         case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
 386         case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
 387         case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
 388                 error("%s died with strange error", argv[0]);
 389         }
 390         return !!err;
 391 }
 392
 393 #endif
 394
 395 struct bundle_transport_data {
 396         int fd;
 397         struct bundle_header header;
 398 };
 399
 400 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 401 {
 402         struct bundle_transport_data *data = transport->data;
 403         struct ref *result = NULL;
 404         int i;
 405
 406         if (for_push)
 407                 return NULL;
 408
 409         if (data->fd > 0)
 410                 close(data->fd);
 411         data->fd = read_bundle_header(transport->url, &data->header);
 412         if (data->fd < 0)
 413                 die ("Could not read bundle '%s'.", transport->url);
 414         for (i = 0; i < data->header.references.nr; i++) {
 415                 struct ref_list_entry *e = data->header.references.list + i;
 416                 struct ref *ref = alloc_ref(e->name);
 417                 hashcpy(ref->old_sha1, e->sha1);
 418                 ref->next = result;
 419                 result = ref;
 420         }
 421         return result;
 422 }
 423
 424 static int fetch_refs_from_bundle(struct transport *transport,
 425                                int nr_heads, const struct ref **to_fetch)
 426 {
 427         struct bundle_transport_data *data = transport->data;
 428         return unbundle(&data->header, data->fd);
 429 }
 430
 431 static int close_bundle(struct transport *transport)
 432 {
 433         struct bundle_transport_data *data = transport->data;
 434         if (data->fd > 0)
 435                 close(data->fd);
 436         free(data);
 437         return 0;
 438 }
 439
 440 struct git_transport_data {
 441         unsigned thin : 1;
 442         unsigned keep : 1;
 443         unsigned followtags : 1;
 444         int depth;
 445         struct child_process *conn;
 446         int fd[2];
 447         const char *uploadpack;
 448         const char *receivepack;
 449         struct extra_have_objects extra_have;
 450 };
 451
 452 static int set_git_option(struct transport *connection,
 453                           const char *name, const char *value)
 454 {
 455         struct git_transport_data *data = connection->data;
 456         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 457                 data->uploadpack = value;
 458                 return 0;
 459         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 460                 data->receivepack = value;
 461                 return 0;
 462         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 463                 data->thin = !!value;
 464                 return 0;
 465         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 466                 data->followtags = !!value;
 467                 return 0;
 468         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 469                 data->keep = !!value;
 470                 return 0;
 471         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 472                 if (!value)
 473                         data->depth = 0;
 474                 else
 475                         data->depth = atoi(value);
 476                 return 0;
 477         }
 478         return 1;
 479 }
 480
 481 static int connect_setup(struct transport *transport, int for_push, int verbose)
 482 {
 483         struct git_transport_data *data = transport->data;
 484         data->conn = git_connect(data->fd, transport->url,
 485                                  for_push ? data->receivepack : data->uploadpack,
 486                                  verbose ? CONNECT_VERBOSE : 0);
 487         return 0;
 488 }
 489
 490 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 491 {
 492         struct git_transport_data *data = transport->data;
 493         struct ref *refs;
 494
 495         connect_setup(transport, for_push, 0);
 496         get_remote_heads(data->fd[0], &refs, 0, NULL,
 497                          for_push ? REF_NORMAL : 0, &data->extra_have);
 498
 499         return refs;
 500 }
 501
 502 static int fetch_refs_via_pack(struct transport *transport,
 503                                int nr_heads, const struct ref **to_fetch)
 504 {
 505         struct git_transport_data *data = transport->data;
 506         char **heads = xmalloc(nr_heads * sizeof(*heads));
 507         char **origh = xmalloc(nr_heads * sizeof(*origh));
 508         const struct ref *refs;
 509         char *dest = xstrdup(transport->url);
 510         struct fetch_pack_args args;
 511         int i;
 512         struct ref *refs_tmp = NULL;
 513
 514         memset(&args, 0, sizeof(args));
 515         args.uploadpack = data->uploadpack;
 516         args.keep_pack = data->keep;
 517         args.lock_pack = 1;
 518         args.use_thin_pack = data->thin;
 519         args.include_tag = data->followtags;
 520         args.verbose = (transport->verbose > 0);
 521         args.quiet = (transport->verbose < 0);
 522         args.no_progress = args.quiet || (!transport->progress && !isatty(1));
 523         args.depth = data->depth;
 524
 525         for (i = 0; i < nr_heads; i++)
 526                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 527
 528         if (!data->conn) {
 529                 connect_setup(transport, 0, 0);
 530                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 531         }
 532
 533         refs = fetch_pack(&args, data->fd, data->conn,
 534                           refs_tmp ? refs_tmp : transport->remote_refs,
 535                           dest, nr_heads, heads, &transport->pack_lockfile);
 536         close(data->fd[0]);
 537         close(data->fd[1]);
 538         if (finish_connect(data->conn))
 539                 refs = NULL;
 540         data->conn = NULL;
 541
 542         free_refs(refs_tmp);
 543
 544         for (i = 0; i < nr_heads; i++)
 545                 free(origh[i]);
 546         free(origh);
 547         free(heads);
 548         free(dest);
 549         return (refs ? 0 : -1);
 550 }
 551
 552 static int refs_pushed(struct ref *ref)
 553 {
 554         for (; ref; ref = ref->next) {
 555                 switch(ref->status) {
 556                 case REF_STATUS_NONE:
 557                 case REF_STATUS_UPTODATE:
 558                         break;
 559                 default:
 560                         return 1;
 561                 }
 562         }
 563         return 0;
 564 }
 565
 566 static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 567 {
 568         struct refspec rs;
 569
 570         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 571                 return;
 572
 573         rs.src = ref->name;
 574         rs.dst = NULL;
 575
 576         if (!remote_find_tracking(remote, &rs)) {
 577                 if (verbose)
 578                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 579                 if (ref->deletion) {
 580                         delete_ref(rs.dst, NULL, 0);
 581                 } else
 582                         update_ref("update by push", rs.dst,
 583                                         ref->new_sha1, NULL, 0, 0);
 584                 free(rs.dst);
 585         }
 586 }
 587
 588 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 589
 590 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 591 {
 592         if (porcelain) {
 593                 if (from)
 594                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 595                 else
 596                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
 597                 if (msg)
 598                         fprintf(stdout, "%s (%s)\n", summary, msg);
 599                 else
 600                         fprintf(stdout, "%s\n", summary);
 601         } else {
 602                 fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 603                 if (from)
 604                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 605                 else
 606                         fputs(prettify_refname(to->name), stderr);
 607                 if (msg) {
 608                         fputs(" (", stderr);
 609                         fputs(msg, stderr);
 610                         fputc(')', stderr);
 611                 }
 612                 fputc('\n', stderr);
 613         }
 614 }
 615
 616 static const char *status_abbrev(unsigned char sha1[20])
 617 {
 618         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 619 }
 620
 621 static void print_ok_ref_status(struct ref *ref, int porcelain)
 622 {
 623         if (ref->deletion)
 624                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 625         else if (is_null_sha1(ref->old_sha1))
 626                 print_ref_status('*',
 627                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 628                         "[new branch]"),
 629                         ref, ref->peer_ref, NULL, porcelain);
 630         else {
 631                 char quickref[84];
 632                 char type;
 633                 const char *msg;
 634
 635                 strcpy(quickref, status_abbrev(ref->old_sha1));
 636                 if (ref->nonfastforward) {
 637                         strcat(quickref, "...");
 638                         type = '+';
 639                         msg = "forced update";
 640                 } else {
 641                         strcat(quickref, "..");
 642                         type = ' ';
 643                         msg = NULL;
 644                 }
 645                 strcat(quickref, status_abbrev(ref->new_sha1));
 646
 647                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 648         }
 649 }
 650
 651 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 652 {
 653         if (!count)
 654                 fprintf(stderr, "To %s\n", dest);
 655
 656         switch(ref->status) {
 657         case REF_STATUS_NONE:
 658                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 659                 break;
 660         case REF_STATUS_REJECT_NODELETE:
 661                 print_ref_status('!', "[rejected]", ref, NULL,
 662                                                  "remote does not support deleting refs", porcelain);
 663                 break;
 664         case REF_STATUS_UPTODATE:
 665                 print_ref_status('=', "[up to date]", ref,
 666                                                  ref->peer_ref, NULL, porcelain);
 667                 break;
 668         case REF_STATUS_REJECT_NONFASTFORWARD:
 669                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 670                                                  "non-fast forward", porcelain);
 671                 break;
 672         case REF_STATUS_REMOTE_REJECT:
 673                 print_ref_status('!', "[remote rejected]", ref,
 674                                                  ref->deletion ? NULL : ref->peer_ref,
 675                                                  ref->remote_status, porcelain);
 676                 break;
 677         case REF_STATUS_EXPECTING_REPORT:
 678                 print_ref_status('!', "[remote failure]", ref,
 679                                                  ref->deletion ? NULL : ref->peer_ref,
 680                                                  "remote failed to report status", porcelain);
 681                 break;
 682         case REF_STATUS_OK:
 683                 print_ok_ref_status(ref, porcelain);
 684                 break;
 685         }
 686
 687         return 1;
 688 }
 689
 690 static void print_push_status(const char *dest, struct ref *refs,
 691                                                           int verbose, int porcelain)
 692 {
 693         struct ref *ref;
 694         int n = 0;
 695
 696         if (verbose) {
 697                 for (ref = refs; ref; ref = ref->next)
 698                         if (ref->status == REF_STATUS_UPTODATE)
 699                                 n += print_one_push_status(ref, dest, n, porcelain);
 700         }
 701
 702         for (ref = refs; ref; ref = ref->next)
 703                 if (ref->status == REF_STATUS_OK)
 704                         n += print_one_push_status(ref, dest, n, porcelain);
 705
 706         for (ref = refs; ref; ref = ref->next) {
 707                 if (ref->status != REF_STATUS_NONE &&
 708                     ref->status != REF_STATUS_UPTODATE &&
 709                     ref->status != REF_STATUS_OK)
 710                         n += print_one_push_status(ref, dest, n, porcelain);
 711         }
 712 }
 713
 714 static void verify_remote_names(int nr_heads, const char **heads)
 715 {
 716         int i;
 717
 718         for (i = 0; i < nr_heads; i++) {
 719                 const char *local = heads[i];
 720                 const char *remote = strrchr(heads[i], ':');
 721
 722                 if (*local == '+')
 723                         local++;
 724
 725                 /* A matching refspec is okay.  */
 726                 if (remote == local && remote[1] == '\0')
 727                         continue;
 728
 729                 remote = remote ? (remote + 1) : local;
 730                 switch (check_ref_format(remote)) {
 731                 case 0: /* ok */
 732                 case CHECK_REF_FORMAT_ONELEVEL:
 733                         /* ok but a single level -- that is fine for
 734                          * a match pattern.
 735                          */
 736                 case CHECK_REF_FORMAT_WILDCARD:
 737                         /* ok but ends with a pattern-match character */
 738                         continue;
 739                 }
 740                 die("remote part of refspec is not a valid name in %s",
 741                     heads[i]);
 742         }
 743 }
 744
 745 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 746 {
 747         struct git_transport_data *data = transport->data;
 748         struct send_pack_args args;
 749         int ret;
 750
 751         if (!data->conn) {
 752                 struct ref *tmp_refs;
 753                 connect_setup(transport, 1, 0);
 754
 755                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 756                                  NULL);
 757         }
 758
 759         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 760         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 761         args.use_thin_pack = data->thin;
 762         args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 763         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 764
 765         ret = send_pack(&args, data->fd, data->conn, remote_refs,
 766                         &data->extra_have);
 767
 768         close(data->fd[1]);
 769         close(data->fd[0]);
 770         ret |= finish_connect(data->conn);
 771         data->conn = NULL;
 772
 773         return ret;
 774 }
 775
 776 static int disconnect_git(struct transport *transport)
 777 {
 778         struct git_transport_data *data = transport->data;
 779         if (data->conn) {
 780                 packet_flush(data->fd[1]);
 781                 close(data->fd[0]);
 782                 close(data->fd[1]);
 783                 finish_connect(data->conn);
 784         }
 785
 786         free(data);
 787         return 0;
 788 }
 789
 790 static int is_local(const char *url)
 791 {
 792         const char *colon = strchr(url, ':');
 793         const char *slash = strchr(url, '/');
 794         return !colon || (slash && slash < colon) ||
 795                 has_dos_drive_prefix(url);
 796 }
 797
 798 static int is_file(const char *url)
 799 {
 800         struct stat buf;
 801         if (stat(url, &buf))
 802                 return 0;
 803         return S_ISREG(buf.st_mode);
 804 }
 805
 806 struct transport *transport_get(struct remote *remote, const char *url)
 807 {
 808         struct transport *ret = xcalloc(1, sizeof(*ret));
 809
 810         ret->remote = remote;
 811         ret->url = url;
 812
 813         if (!prefixcmp(url, "rsync:")) {
 814                 ret->get_refs_list = get_refs_via_rsync;
 815                 ret->fetch = fetch_objs_via_rsync;
 816                 ret->push = rsync_transport_push;
 817
 818         } else if (!prefixcmp(url, "http://")
 819                 || !prefixcmp(url, "https://")
 820                 || !prefixcmp(url, "ftp://")) {
 821                 transport_helper_init(ret, "curl");
 822 #ifdef NO_CURL
 823                 error("git was compiled without libcurl support.");
 824 #else
 825                 ret->push = curl_transport_push;
 826 #endif
 827
 828         } else if (is_local(url) && is_file(url)) {
 829                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 830                 ret->data = data;
 831                 ret->get_refs_list = get_refs_from_bundle;
 832                 ret->fetch = fetch_refs_from_bundle;
 833                 ret->disconnect = close_bundle;
 834
 835         } else {
 836                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 837                 ret->data = data;
 838                 ret->set_option = set_git_option;
 839                 ret->get_refs_list = get_refs_via_connect;
 840                 ret->fetch = fetch_refs_via_pack;
 841                 ret->push_refs = git_transport_push;
 842                 ret->disconnect = disconnect_git;
 843
 844                 data->thin = 1;
 845                 data->conn = NULL;
 846                 data->uploadpack = "git-upload-pack";
 847                 if (remote && remote->uploadpack)
 848                         data->uploadpack = remote->uploadpack;
 849                 data->receivepack = "git-receive-pack";
 850                 if (remote && remote->receivepack)
 851                         data->receivepack = remote->receivepack;
 852         }
 853
 854         return ret;
 855 }
 856
 857 int transport_set_option(struct transport *transport,
 858                          const char *name, const char *value)
 859 {
 860         if (transport->set_option)
 861                 return transport->set_option(transport, name, value);
 862         return 1;
 863 }
 864
 865 int transport_push(struct transport *transport,
 866                    int refspec_nr, const char **refspec, int flags)
 867 {
 868         verify_remote_names(refspec_nr, refspec);
 869
 870         if (transport->push)
 871                 return transport->push(transport, refspec_nr, refspec, flags);
 872         if (transport->push_refs) {
 873                 struct ref *remote_refs =
 874                         transport->get_refs_list(transport, 1);
 875                 struct ref *local_refs = get_local_heads();
 876                 int match_flags = MATCH_REFS_NONE;
 877                 int verbose = flags & TRANSPORT_PUSH_VERBOSE;
 878                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 879                 int ret;
 880
 881                 if (flags & TRANSPORT_PUSH_ALL)
 882                         match_flags |= MATCH_REFS_ALL;
 883                 if (flags & TRANSPORT_PUSH_MIRROR)
 884                         match_flags |= MATCH_REFS_MIRROR;
 885
 886                 if (match_refs(local_refs, &remote_refs,
 887                                refspec_nr, refspec, match_flags)) {
 888                         return -1;
 889                 }
 890
 891                 ret = transport->push_refs(transport, remote_refs, flags);
 892
 893                 print_push_status(transport->url, remote_refs, verbose | porcelain, porcelain);
 894
 895                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 896                         struct ref *ref;
 897                         for (ref = remote_refs; ref; ref = ref->next)
 898                                 update_tracking_ref(transport->remote, ref, verbose);
 899                 }
 900
 901                 if (!ret && !refs_pushed(remote_refs))
 902                         fprintf(stderr, "Everything up-to-date\n");
 903                 return ret;
 904         }
 905         return 1;
 906 }
 907
 908 const struct ref *transport_get_remote_refs(struct transport *transport)
 909 {
 910         if (!transport->remote_refs)
 911                 transport->remote_refs = transport->get_refs_list(transport, 0);
 912         return transport->remote_refs;
 913 }
 914
 915 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 916 {
 917         int rc;
 918         int nr_heads = 0, nr_alloc = 0;
 919         const struct ref **heads = NULL;
 920         const struct ref *rm;
 921
 922         for (rm = refs; rm; rm = rm->next) {
 923                 if (rm->peer_ref &&
 924                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
 925                         continue;
 926                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 927                 heads[nr_heads++] = rm;
 928         }
 929
 930         rc = transport->fetch(transport, nr_heads, heads);
 931         free(heads);
 932         return rc;
 933 }
 934
 935 void transport_unlock_pack(struct transport *transport)
 936 {
 937         if (transport->pack_lockfile) {
 938                 unlink_or_warn(transport->pack_lockfile);
 939                 free(transport->pack_lockfile);
 940                 transport->pack_lockfile = NULL;
 941         }
 942 }
 943
 944 int transport_disconnect(struct transport *transport)
 945 {
 946         int ret = 0;
 947         if (transport->disconnect)
 948                 ret = transport->disconnect(transport);
 949         free(transport);
 950         return ret;
 951 }
 952
 953 /*
 954  * Strip username (and password) from an url and return
 955  * it in a newly allocated string.
 956  */
 957 char *transport_anonymize_url(const char *url)
 958 {
 959         char *anon_url, *scheme_prefix, *anon_part;
 960         size_t anon_len, prefix_len = 0;
 961
 962         anon_part = strchr(url, '@');
 963         if (is_local(url) || !anon_part)
 964                 goto literal_copy;
 965
 966         anon_len = strlen(++anon_part);
 967         scheme_prefix = strstr(url, "://");
 968         if (!scheme_prefix) {
 969                 if (!strchr(anon_part, ':'))
 970                         /* cannot be "me@there:/path/name" */
 971                         goto literal_copy;
 972         } else {
 973                 const char *cp;
 974                 /* make sure scheme is reasonable */
 975                 for (cp = url; cp < scheme_prefix; cp++) {
 976                         switch (*cp) {
 977                                 /* RFC 1738 2.1 */
 978                         case '+': case '.': case '-':
 979                                 break; /* ok */
 980                         default:
 981                                 if (isalnum(*cp))
 982                                         break;
 983                                 /* it isn't */
 984                                 goto literal_copy;
 985                         }
 986                 }
 987                 /* @ past the first slash does not count */
 988                 cp = strchr(scheme_prefix + 3, '/');
 989                 if (cp && cp < anon_part)
 990                         goto literal_copy;
 991                 prefix_len = scheme_prefix - url + 3;
 992         }
 993         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
 994         memcpy(anon_url, url, prefix_len);
 995         memcpy(anon_url + prefix_len, anon_part, anon_len);
 996         return anon_url;
 997 literal_copy:
 998         return xstrdup(url);
 999 }