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 push_had_errors(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                 case REF_STATUS_OK:
 545                         break;
 546                 default:
 547                         return 1;
 548                 }
 549         }
 550         return 0;
 551 }
 552
 553 static int refs_pushed(struct ref *ref)
 554 {
 555         for (; ref; ref = ref->next) {
 556                 switch(ref->status) {
 557                 case REF_STATUS_NONE:
 558                 case REF_STATUS_UPTODATE:
 559                         break;
 560                 default:
 561                         return 1;
 562                 }
 563         }
 564         return 0;
 565 }
 566
 567 static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 568 {
 569         struct refspec rs;
 570
 571         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 572                 return;
 573
 574         rs.src = ref->name;
 575         rs.dst = NULL;
 576
 577         if (!remote_find_tracking(remote, &rs)) {
 578                 if (verbose)
 579                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 580                 if (ref->deletion) {
 581                         delete_ref(rs.dst, NULL, 0);
 582                 } else
 583                         update_ref("update by push", rs.dst,
 584                                         ref->new_sha1, NULL, 0, 0);
 585                 free(rs.dst);
 586         }
 587 }
 588
 589 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 590
 591 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 592 {
 593         if (porcelain) {
 594                 if (from)
 595                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 596                 else
 597                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
 598                 if (msg)
 599                         fprintf(stdout, "%s (%s)\n", summary, msg);
 600                 else
 601                         fprintf(stdout, "%s\n", summary);
 602         } else {
 603                 fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
 604                 if (from)
 605                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 606                 else
 607                         fputs(prettify_refname(to->name), stderr);
 608                 if (msg) {
 609                         fputs(" (", stderr);
 610                         fputs(msg, stderr);
 611                         fputc(')', stderr);
 612                 }
 613                 fputc('\n', stderr);
 614         }
 615 }
 616
 617 static const char *status_abbrev(unsigned char sha1[20])
 618 {
 619         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 620 }
 621
 622 static void print_ok_ref_status(struct ref *ref, int porcelain)
 623 {
 624         if (ref->deletion)
 625                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 626         else if (is_null_sha1(ref->old_sha1))
 627                 print_ref_status('*',
 628                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 629                         "[new branch]"),
 630                         ref, ref->peer_ref, NULL, porcelain);
 631         else {
 632                 char quickref[84];
 633                 char type;
 634                 const char *msg;
 635
 636                 strcpy(quickref, status_abbrev(ref->old_sha1));
 637                 if (ref->nonfastforward) {
 638                         strcat(quickref, "...");
 639                         type = '+';
 640                         msg = "forced update";
 641                 } else {
 642                         strcat(quickref, "..");
 643                         type = ' ';
 644                         msg = NULL;
 645                 }
 646                 strcat(quickref, status_abbrev(ref->new_sha1));
 647
 648                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 649         }
 650 }
 651
 652 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 653 {
 654         if (!count)
 655                 fprintf(stderr, "To %s\n", dest);
 656
 657         switch(ref->status) {
 658         case REF_STATUS_NONE:
 659                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 660                 break;
 661         case REF_STATUS_REJECT_NODELETE:
 662                 print_ref_status('!', "[rejected]", ref, NULL,
 663                                                  "remote does not support deleting refs", porcelain);
 664                 break;
 665         case REF_STATUS_UPTODATE:
 666                 print_ref_status('=', "[up to date]", ref,
 667                                                  ref->peer_ref, NULL, porcelain);
 668                 break;
 669         case REF_STATUS_REJECT_NONFASTFORWARD:
 670                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 671                                                  "non-fast forward", porcelain);
 672                 break;
 673         case REF_STATUS_REMOTE_REJECT:
 674                 print_ref_status('!', "[remote rejected]", ref,
 675                                                  ref->deletion ? NULL : ref->peer_ref,
 676                                                  ref->remote_status, porcelain);
 677                 break;
 678         case REF_STATUS_EXPECTING_REPORT:
 679                 print_ref_status('!', "[remote failure]", ref,
 680                                                  ref->deletion ? NULL : ref->peer_ref,
 681                                                  "remote failed to report status", porcelain);
 682                 break;
 683         case REF_STATUS_OK:
 684                 print_ok_ref_status(ref, porcelain);
 685                 break;
 686         }
 687
 688         return 1;
 689 }
 690
 691 static void print_push_status(const char *dest, struct ref *refs,
 692                               int verbose, int porcelain, int * nonfastforward)
 693 {
 694         struct ref *ref;
 695         int n = 0;
 696
 697         if (verbose) {
 698                 for (ref = refs; ref; ref = ref->next)
 699                         if (ref->status == REF_STATUS_UPTODATE)
 700                                 n += print_one_push_status(ref, dest, n, porcelain);
 701         }
 702
 703         for (ref = refs; ref; ref = ref->next)
 704                 if (ref->status == REF_STATUS_OK)
 705                         n += print_one_push_status(ref, dest, n, porcelain);
 706
 707         *nonfastforward = 0;
 708         for (ref = refs; ref; ref = ref->next) {
 709                 if (ref->status != REF_STATUS_NONE &&
 710                     ref->status != REF_STATUS_UPTODATE &&
 711                     ref->status != REF_STATUS_OK)
 712                         n += print_one_push_status(ref, dest, n, porcelain);
 713                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 714                         *nonfastforward = 1;
 715         }
 716 }
 717
 718 static void verify_remote_names(int nr_heads, const char **heads)
 719 {
 720         int i;
 721
 722         for (i = 0; i < nr_heads; i++) {
 723                 const char *local = heads[i];
 724                 const char *remote = strrchr(heads[i], ':');
 725
 726                 if (*local == '+')
 727                         local++;
 728
 729                 /* A matching refspec is okay.  */
 730                 if (remote == local && remote[1] == '\0')
 731                         continue;
 732
 733                 remote = remote ? (remote + 1) : local;
 734                 switch (check_ref_format(remote)) {
 735                 case 0: /* ok */
 736                 case CHECK_REF_FORMAT_ONELEVEL:
 737                         /* ok but a single level -- that is fine for
 738                          * a match pattern.
 739                          */
 740                 case CHECK_REF_FORMAT_WILDCARD:
 741                         /* ok but ends with a pattern-match character */
 742                         continue;
 743                 }
 744                 die("remote part of refspec is not a valid name in %s",
 745                     heads[i]);
 746         }
 747 }
 748
 749 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 750 {
 751         struct git_transport_data *data = transport->data;
 752         struct send_pack_args args;
 753         int ret;
 754
 755         if (!data->conn) {
 756                 struct ref *tmp_refs;
 757                 connect_setup(transport, 1, 0);
 758
 759                 get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 760                                  NULL);
 761         }
 762
 763         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 764         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 765         args.use_thin_pack = data->thin;
 766         args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
 767         args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
 768         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 769
 770         ret = send_pack(&args, data->fd, data->conn, remote_refs,
 771                         &data->extra_have);
 772
 773         close(data->fd[1]);
 774         close(data->fd[0]);
 775         ret |= finish_connect(data->conn);
 776         data->conn = NULL;
 777
 778         return ret;
 779 }
 780
 781 static int disconnect_git(struct transport *transport)
 782 {
 783         struct git_transport_data *data = transport->data;
 784         if (data->conn) {
 785                 packet_flush(data->fd[1]);
 786                 close(data->fd[0]);
 787                 close(data->fd[1]);
 788                 finish_connect(data->conn);
 789         }
 790
 791         free(data);
 792         return 0;
 793 }
 794
 795 static int is_local(const char *url)
 796 {
 797         const char *colon = strchr(url, ':');
 798         const char *slash = strchr(url, '/');
 799         return !colon || (slash && slash < colon) ||
 800                 has_dos_drive_prefix(url);
 801 }
 802
 803 static int is_file(const char *url)
 804 {
 805         struct stat buf;
 806         if (stat(url, &buf))
 807                 return 0;
 808         return S_ISREG(buf.st_mode);
 809 }
 810
 811 struct transport *transport_get(struct remote *remote, const char *url)
 812 {
 813         struct transport *ret = xcalloc(1, sizeof(*ret));
 814
 815         ret->remote = remote;
 816         ret->url = url;
 817
 818         if (!prefixcmp(url, "rsync:")) {
 819                 ret->get_refs_list = get_refs_via_rsync;
 820                 ret->fetch = fetch_objs_via_rsync;
 821                 ret->push = rsync_transport_push;
 822
 823         } else if (!prefixcmp(url, "http://")
 824                 || !prefixcmp(url, "https://")
 825                 || !prefixcmp(url, "ftp://")) {
 826                 transport_helper_init(ret, "curl");
 827 #ifdef NO_CURL
 828                 error("git was compiled without libcurl support.");
 829 #else
 830                 ret->push = curl_transport_push;
 831 #endif
 832
 833         } else if (is_local(url) && is_file(url)) {
 834                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 835                 ret->data = data;
 836                 ret->get_refs_list = get_refs_from_bundle;
 837                 ret->fetch = fetch_refs_from_bundle;
 838                 ret->disconnect = close_bundle;
 839
 840         } else {
 841                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 842                 ret->data = data;
 843                 ret->set_option = set_git_option;
 844                 ret->get_refs_list = get_refs_via_connect;
 845                 ret->fetch = fetch_refs_via_pack;
 846                 ret->push_refs = git_transport_push;
 847                 ret->disconnect = disconnect_git;
 848
 849                 data->thin = 1;
 850                 data->conn = NULL;
 851                 data->uploadpack = "git-upload-pack";
 852                 if (remote && remote->uploadpack)
 853                         data->uploadpack = remote->uploadpack;
 854                 data->receivepack = "git-receive-pack";
 855                 if (remote && remote->receivepack)
 856                         data->receivepack = remote->receivepack;
 857         }
 858
 859         return ret;
 860 }
 861
 862 int transport_set_option(struct transport *transport,
 863                          const char *name, const char *value)
 864 {
 865         if (transport->set_option)
 866                 return transport->set_option(transport, name, value);
 867         return 1;
 868 }
 869
 870 int transport_push(struct transport *transport,
 871                    int refspec_nr, const char **refspec, int flags,
 872                    int *nonfastforward)
 873 {
 874         *nonfastforward = 0;
 875         verify_remote_names(refspec_nr, refspec);
 876
 877         if (transport->push)
 878                 return transport->push(transport, refspec_nr, refspec, flags);
 879         if (transport->push_refs) {
 880                 struct ref *remote_refs =
 881                         transport->get_refs_list(transport, 1);
 882                 struct ref *local_refs = get_local_heads();
 883                 int match_flags = MATCH_REFS_NONE;
 884                 int verbose = flags & TRANSPORT_PUSH_VERBOSE;
 885                 int quiet = flags & TRANSPORT_PUSH_QUIET;
 886                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
 887                 int ret;
 888
 889                 if (flags & TRANSPORT_PUSH_ALL)
 890                         match_flags |= MATCH_REFS_ALL;
 891                 if (flags & TRANSPORT_PUSH_MIRROR)
 892                         match_flags |= MATCH_REFS_MIRROR;
 893
 894                 if (match_refs(local_refs, &remote_refs,
 895                                refspec_nr, refspec, match_flags)) {
 896                         return -1;
 897                 }
 898
 899                 ret = transport->push_refs(transport, remote_refs, flags);
 900
 901                 if (!quiet || push_had_errors(remote_refs))
 902                         print_push_status(transport->url, remote_refs,
 903                                         verbose | porcelain, porcelain,
 904                                         nonfastforward);
 905
 906                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
 907                         struct ref *ref;
 908                         for (ref = remote_refs; ref; ref = ref->next)
 909                                 update_tracking_ref(transport->remote, ref, verbose);
 910                 }
 911
 912                 if (!quiet && !ret && !refs_pushed(remote_refs))
 913                         fprintf(stderr, "Everything up-to-date\n");
 914                 return ret;
 915         }
 916         return 1;
 917 }
 918
 919 const struct ref *transport_get_remote_refs(struct transport *transport)
 920 {
 921         if (!transport->remote_refs)
 922                 transport->remote_refs = transport->get_refs_list(transport, 0);
 923         return transport->remote_refs;
 924 }
 925
 926 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 927 {
 928         int rc;
 929         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 930         const struct ref **heads = NULL;
 931         const struct ref *rm;
 932
 933         for (rm = refs; rm; rm = rm->next) {
 934                 nr_refs++;
 935                 if (rm->peer_ref &&
 936                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
 937                         continue;
 938                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 939                 heads[nr_heads++] = rm;
 940         }
 941
 942         if (!nr_heads) {
 943                 /*
 944                  * When deepening of a shallow repository is requested,
 945                  * then local and remote refs are likely to still be equal.
 946                  * Just feed them all to the fetch method in that case.
 947                  * This condition shouldn't be met in a non-deepening fetch
 948                  * (see builtin-fetch.c:quickfetch()).
 949                  */
 950                 heads = xmalloc(nr_refs * sizeof(*heads));
 951                 for (rm = refs; rm; rm = rm->next)
 952                         heads[nr_heads++] = rm;
 953         }
 954
 955         rc = transport->fetch(transport, nr_heads, heads);
 956         free(heads);
 957         return rc;
 958 }
 959
 960 void transport_unlock_pack(struct transport *transport)
 961 {
 962         if (transport->pack_lockfile) {
 963                 unlink_or_warn(transport->pack_lockfile);
 964                 free(transport->pack_lockfile);
 965                 transport->pack_lockfile = NULL;
 966         }
 967 }
 968
 969 int transport_disconnect(struct transport *transport)
 970 {
 971         int ret = 0;
 972         if (transport->disconnect)
 973                 ret = transport->disconnect(transport);
 974         free(transport);
 975         return ret;
 976 }
 977
 978 /*
 979  * Strip username (and password) from an url and return
 980  * it in a newly allocated string.
 981  */
 982 char *transport_anonymize_url(const char *url)
 983 {
 984         char *anon_url, *scheme_prefix, *anon_part;
 985         size_t anon_len, prefix_len = 0;
 986
 987         anon_part = strchr(url, '@');
 988         if (is_local(url) || !anon_part)
 989                 goto literal_copy;
 990
 991         anon_len = strlen(++anon_part);
 992         scheme_prefix = strstr(url, "://");
 993         if (!scheme_prefix) {
 994                 if (!strchr(anon_part, ':'))
 995                         /* cannot be "me@there:/path/name" */
 996                         goto literal_copy;
 997         } else {
 998                 const char *cp;
 999                 /* make sure scheme is reasonable */
1000                 for (cp = url; cp < scheme_prefix; cp++) {
1001                         switch (*cp) {
1002                                 /* RFC 1738 2.1 */
1003                         case '+': case '.': case '-':
1004                                 break; /* ok */
1005                         default:
1006                                 if (isalnum(*cp))
1007                                         break;
1008                                 /* it isn't */
1009                                 goto literal_copy;
1010                         }
1011                 }
1012                 /* @ past the first slash does not count */
1013                 cp = strchr(scheme_prefix + 3, '/');
1014                 if (cp && cp < anon_part)
1015                         goto literal_copy;
1016                 prefix_len = scheme_prefix - url + 3;
1017         }
1018         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1019         memcpy(anon_url, url, prefix_len);
1020         memcpy(anon_url + prefix_len, anon_part, anon_len);
1021         return anon_url;
1022 literal_copy:
1023         return xstrdup(url);
1024 }