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 #include "branch.h"
  12 #include "url.h"
  13 #include "submodule.h"
  14 #include "string-list.h"
  15
  16 /* rsync support */
  17
  18 /*
  19  * We copy packed-refs and refs/ into a temporary file, then read the
  20  * loose refs recursively (sorting whenever possible), and then inserting
  21  * those packed refs that are not yet in the list (not validating, but
  22  * assuming that the file is sorted).
  23  *
  24  * Appears refactoring this from refs.c is too cumbersome.
  25  */
  26
  27 static int str_cmp(const void *a, const void *b)
  28 {
  29         const char *s1 = a;
  30         const char *s2 = b;
  31
  32         return strcmp(s1, s2);
  33 }
  34
  35 /* path->buf + name_offset is expected to point to "refs/" */
  36
  37 static int read_loose_refs(struct strbuf *path, int name_offset,
  38                 struct ref **tail)
  39 {
  40         DIR *dir = opendir(path->buf);
  41         struct dirent *de;
  42         struct {
  43                 char **entries;
  44                 int nr, alloc;
  45         } list;
  46         int i, pathlen;
  47
  48         if (!dir)
  49                 return -1;
  50
  51         memset (&list, 0, sizeof(list));
  52
  53         while ((de = readdir(dir))) {
  54                 if (is_dot_or_dotdot(de->d_name))
  55                         continue;
  56                 ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  57                 list.entries[list.nr++] = xstrdup(de->d_name);
  58         }
  59         closedir(dir);
  60
  61         /* sort the list */
  62
  63         qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  64
  65         pathlen = path->len;
  66         strbuf_addch(path, '/');
  67
  68         for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  69                 strbuf_addstr(path, list.entries[i]);
  70                 if (read_loose_refs(path, name_offset, tail)) {
  71                         int fd = open(path->buf, O_RDONLY);
  72                         char buffer[40];
  73                         struct ref *next;
  74
  75                         if (fd < 0)
  76                                 continue;
  77                         next = alloc_ref(path->buf + name_offset);
  78                         if (read_in_full(fd, buffer, 40) != 40 ||
  79                                         get_sha1_hex(buffer, next->old_sha1)) {
  80                                 close(fd);
  81                                 free(next);
  82                                 continue;
  83                         }
  84                         close(fd);
  85                         (*tail)->next = next;
  86                         *tail = next;
  87                 }
  88         }
  89         strbuf_setlen(path, pathlen);
  90
  91         for (i = 0; i < list.nr; i++)
  92                 free(list.entries[i]);
  93         free(list.entries);
  94
  95         return 0;
  96 }
  97
  98 /* insert the packed refs for which no loose refs were found */
  99
 100 static void insert_packed_refs(const char *packed_refs, struct ref **list)
 101 {
 102         FILE *f = fopen(packed_refs, "r");
 103         static char buffer[PATH_MAX];
 104
 105         if (!f)
 106                 return;
 107
 108         for (;;) {
 109                 int cmp = cmp, len;
 110
 111                 if (!fgets(buffer, sizeof(buffer), f)) {
 112                         fclose(f);
 113                         return;
 114                 }
 115
 116                 if (hexval(buffer[0]) > 0xf)
 117                         continue;
 118                 len = strlen(buffer);
 119                 if (len && buffer[len - 1] == '\n')
 120                         buffer[--len] = '\0';
 121                 if (len < 41)
 122                         continue;
 123                 while ((*list)->next &&
 124                                 (cmp = strcmp(buffer + 41,
 125                                       (*list)->next->name)) > 0)
 126                         list = &(*list)->next;
 127                 if (!(*list)->next || cmp < 0) {
 128                         struct ref *next = alloc_ref(buffer + 41);
 129                         buffer[40] = '\0';
 130                         if (get_sha1_hex(buffer, next->old_sha1)) {
 131                                 warning ("invalid SHA-1: %s", buffer);
 132                                 free(next);
 133                                 continue;
 134                         }
 135                         next->next = (*list)->next;
 136                         (*list)->next = next;
 137                         list = &(*list)->next;
 138                 }
 139         }
 140 }
 141
 142 static void set_upstreams(struct transport *transport, struct ref *refs,
 143         int pretend)
 144 {
 145         struct ref *ref;
 146         for (ref = refs; ref; ref = ref->next) {
 147                 const char *localname;
 148                 const char *tmp;
 149                 const char *remotename;
 150                 unsigned char sha[20];
 151                 int flag = 0;
 152                 /*
 153                  * Check suitability for tracking. Must be successful /
 154                  * already up-to-date ref create/modify (not delete).
 155                  */
 156                 if (ref->status != REF_STATUS_OK &&
 157                         ref->status != REF_STATUS_UPTODATE)
 158                         continue;
 159                 if (!ref->peer_ref)
 160                         continue;
 161                 if (is_null_sha1(ref->new_sha1))
 162                         continue;
 163
 164                 /* Follow symbolic refs (mainly for HEAD). */
 165                 localname = ref->peer_ref->name;
 166                 remotename = ref->name;
 167                 tmp = resolve_ref_unsafe(localname, sha, 1, &flag);
 168                 if (tmp && flag & REF_ISSYMREF &&
 169                         !prefixcmp(tmp, "refs/heads/"))
 170                         localname = tmp;
 171
 172                 /* Both source and destination must be local branches. */
 173                 if (!localname || prefixcmp(localname, "refs/heads/"))
 174                         continue;
 175                 if (!remotename || prefixcmp(remotename, "refs/heads/"))
 176                         continue;
 177
 178                 if (!pretend)
 179                         install_branch_config(BRANCH_CONFIG_VERBOSE,
 180                                 localname + 11, transport->remote->name,
 181                                 remotename);
 182                 else
 183                         printf("Would set upstream of '%s' to '%s' of '%s'\n",
 184                                 localname + 11, remotename + 11,
 185                                 transport->remote->name);
 186         }
 187 }
 188
 189 static const char *rsync_url(const char *url)
 190 {
 191         return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 192 }
 193
 194 static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 195 {
 196         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 197         struct ref dummy = {NULL}, *tail = &dummy;
 198         struct child_process rsync;
 199         const char *args[5];
 200         int temp_dir_len;
 201
 202         if (for_push)
 203                 return NULL;
 204
 205         /* copy the refs to the temporary directory */
 206
 207         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 208         if (!mkdtemp(temp_dir.buf))
 209                 die_errno ("Could not make temporary directory");
 210         temp_dir_len = temp_dir.len;
 211
 212         strbuf_addstr(&buf, rsync_url(transport->url));
 213         strbuf_addstr(&buf, "/refs");
 214
 215         memset(&rsync, 0, sizeof(rsync));
 216         rsync.argv = args;
 217         rsync.stdout_to_stderr = 1;
 218         args[0] = "rsync";
 219         args[1] = (transport->verbose > 1) ? "-rv" : "-r";
 220         args[2] = buf.buf;
 221         args[3] = temp_dir.buf;
 222         args[4] = NULL;
 223
 224         if (run_command(&rsync))
 225                 die ("Could not run rsync to get refs");
 226
 227         strbuf_reset(&buf);
 228         strbuf_addstr(&buf, rsync_url(transport->url));
 229         strbuf_addstr(&buf, "/packed-refs");
 230
 231         args[2] = buf.buf;
 232
 233         if (run_command(&rsync))
 234                 die ("Could not run rsync to get refs");
 235
 236         /* read the copied refs */
 237
 238         strbuf_addstr(&temp_dir, "/refs");
 239         read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 240         strbuf_setlen(&temp_dir, temp_dir_len);
 241
 242         tail = &dummy;
 243         strbuf_addstr(&temp_dir, "/packed-refs");
 244         insert_packed_refs(temp_dir.buf, &tail);
 245         strbuf_setlen(&temp_dir, temp_dir_len);
 246
 247         if (remove_dir_recursively(&temp_dir, 0))
 248                 warning ("Error removing temporary directory %s.",
 249                                 temp_dir.buf);
 250
 251         strbuf_release(&buf);
 252         strbuf_release(&temp_dir);
 253
 254         return dummy.next;
 255 }
 256
 257 static int fetch_objs_via_rsync(struct transport *transport,
 258                                 int nr_objs, struct ref **to_fetch)
 259 {
 260         struct strbuf buf = STRBUF_INIT;
 261         struct child_process rsync;
 262         const char *args[8];
 263         int result;
 264
 265         strbuf_addstr(&buf, rsync_url(transport->url));
 266         strbuf_addstr(&buf, "/objects/");
 267
 268         memset(&rsync, 0, sizeof(rsync));
 269         rsync.argv = args;
 270         rsync.stdout_to_stderr = 1;
 271         args[0] = "rsync";
 272         args[1] = (transport->verbose > 1) ? "-rv" : "-r";
 273         args[2] = "--ignore-existing";
 274         args[3] = "--exclude";
 275         args[4] = "info";
 276         args[5] = buf.buf;
 277         args[6] = get_object_directory();
 278         args[7] = NULL;
 279
 280         /* NEEDSWORK: handle one level of alternates */
 281         result = run_command(&rsync);
 282
 283         strbuf_release(&buf);
 284
 285         return result;
 286 }
 287
 288 static int write_one_ref(const char *name, const unsigned char *sha1,
 289                 int flags, void *data)
 290 {
 291         struct strbuf *buf = data;
 292         int len = buf->len;
 293         FILE *f;
 294
 295         /* when called via for_each_ref(), flags is non-zero */
 296         if (flags && prefixcmp(name, "refs/heads/") &&
 297                         prefixcmp(name, "refs/tags/"))
 298                 return 0;
 299
 300         strbuf_addstr(buf, name);
 301         if (safe_create_leading_directories(buf->buf) ||
 302                         !(f = fopen(buf->buf, "w")) ||
 303                         fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 304                         fclose(f))
 305                 return error("problems writing temporary file %s", buf->buf);
 306         strbuf_setlen(buf, len);
 307         return 0;
 308 }
 309
 310 static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 311                 int refspec_nr, const char **refspec)
 312 {
 313         int i;
 314
 315         for (i = 0; i < refspec_nr; i++) {
 316                 unsigned char sha1[20];
 317                 char *ref;
 318
 319                 if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 320                         return error("Could not get ref %s", refspec[i]);
 321
 322                 if (write_one_ref(ref, sha1, 0, temp_dir)) {
 323                         free(ref);
 324                         return -1;
 325                 }
 326                 free(ref);
 327         }
 328         return 0;
 329 }
 330
 331 static int rsync_transport_push(struct transport *transport,
 332                 int refspec_nr, const char **refspec, int flags)
 333 {
 334         struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 335         int result = 0, i;
 336         struct child_process rsync;
 337         const char *args[10];
 338
 339         if (flags & TRANSPORT_PUSH_MIRROR)
 340                 return error("rsync transport does not support mirror mode");
 341
 342         /* first push the objects */
 343
 344         strbuf_addstr(&buf, rsync_url(transport->url));
 345         strbuf_addch(&buf, '/');
 346
 347         memset(&rsync, 0, sizeof(rsync));
 348         rsync.argv = args;
 349         rsync.stdout_to_stderr = 1;
 350         i = 0;
 351         args[i++] = "rsync";
 352         args[i++] = "-a";
 353         if (flags & TRANSPORT_PUSH_DRY_RUN)
 354                 args[i++] = "--dry-run";
 355         if (transport->verbose > 1)
 356                 args[i++] = "-v";
 357         args[i++] = "--ignore-existing";
 358         args[i++] = "--exclude";
 359         args[i++] = "info";
 360         args[i++] = get_object_directory();
 361         args[i++] = buf.buf;
 362         args[i++] = NULL;
 363
 364         if (run_command(&rsync))
 365                 return error("Could not push objects to %s",
 366                                 rsync_url(transport->url));
 367
 368         /* copy the refs to the temporary directory; they could be packed. */
 369
 370         strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 371         if (!mkdtemp(temp_dir.buf))
 372                 die_errno ("Could not make temporary directory");
 373         strbuf_addch(&temp_dir, '/');
 374
 375         if (flags & TRANSPORT_PUSH_ALL) {
 376                 if (for_each_ref(write_one_ref, &temp_dir))
 377                         return -1;
 378         } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 379                 return -1;
 380
 381         i = 2;
 382         if (flags & TRANSPORT_PUSH_DRY_RUN)
 383                 args[i++] = "--dry-run";
 384         if (!(flags & TRANSPORT_PUSH_FORCE))
 385                 args[i++] = "--ignore-existing";
 386         args[i++] = temp_dir.buf;
 387         args[i++] = rsync_url(transport->url);
 388         args[i++] = NULL;
 389         if (run_command(&rsync))
 390                 result = error("Could not push to %s",
 391                                 rsync_url(transport->url));
 392
 393         if (remove_dir_recursively(&temp_dir, 0))
 394                 warning ("Could not remove temporary directory %s.",
 395                                 temp_dir.buf);
 396
 397         strbuf_release(&buf);
 398         strbuf_release(&temp_dir);
 399
 400         return result;
 401 }
 402
 403 struct bundle_transport_data {
 404         int fd;
 405         struct bundle_header header;
 406 };
 407
 408 static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 409 {
 410         struct bundle_transport_data *data = transport->data;
 411         struct ref *result = NULL;
 412         int i;
 413
 414         if (for_push)
 415                 return NULL;
 416
 417         if (data->fd > 0)
 418                 close(data->fd);
 419         data->fd = read_bundle_header(transport->url, &data->header);
 420         if (data->fd < 0)
 421                 die ("Could not read bundle '%s'.", transport->url);
 422         for (i = 0; i < data->header.references.nr; i++) {
 423                 struct ref_list_entry *e = data->header.references.list + i;
 424                 struct ref *ref = alloc_ref(e->name);
 425                 hashcpy(ref->old_sha1, e->sha1);
 426                 ref->next = result;
 427                 result = ref;
 428         }
 429         return result;
 430 }
 431
 432 static int fetch_refs_from_bundle(struct transport *transport,
 433                                int nr_heads, struct ref **to_fetch)
 434 {
 435         struct bundle_transport_data *data = transport->data;
 436         return unbundle(&data->header, data->fd,
 437                         transport->progress ? BUNDLE_VERBOSE : 0);
 438 }
 439
 440 static int close_bundle(struct transport *transport)
 441 {
 442         struct bundle_transport_data *data = transport->data;
 443         if (data->fd > 0)
 444                 close(data->fd);
 445         free(data);
 446         return 0;
 447 }
 448
 449 struct git_transport_data {
 450         struct git_transport_options options;
 451         struct child_process *conn;
 452         int fd[2];
 453         unsigned got_remote_heads : 1;
 454         struct extra_have_objects extra_have;
 455 };
 456
 457 static int set_git_option(struct git_transport_options *opts,
 458                           const char *name, const char *value)
 459 {
 460         if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 461                 opts->uploadpack = value;
 462                 return 0;
 463         } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 464                 opts->receivepack = value;
 465                 return 0;
 466         } else if (!strcmp(name, TRANS_OPT_THIN)) {
 467                 opts->thin = !!value;
 468                 return 0;
 469         } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 470                 opts->followtags = !!value;
 471                 return 0;
 472         } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 473                 opts->keep = !!value;
 474                 return 0;
 475         } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 476                 if (!value)
 477                         opts->depth = 0;
 478                 else {
 479                         char *end;
 480                         opts->depth = strtol(value, &end, 0);
 481                         if (*end)
 482                                 die("transport: invalid depth option '%s'", value);
 483                 }
 484                 return 0;
 485         }
 486         return 1;
 487 }
 488
 489 static int connect_setup(struct transport *transport, int for_push, int verbose)
 490 {
 491         struct git_transport_data *data = transport->data;
 492
 493         if (data->conn)
 494                 return 0;
 495
 496         data->conn = git_connect(data->fd, transport->url,
 497                                  for_push ? data->options.receivepack :
 498                                  data->options.uploadpack,
 499                                  verbose ? CONNECT_VERBOSE : 0);
 500
 501         return 0;
 502 }
 503
 504 static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 505 {
 506         struct git_transport_data *data = transport->data;
 507         struct ref *refs;
 508
 509         connect_setup(transport, for_push, 0);
 510         get_remote_heads(data->fd[0], &refs,
 511                          for_push ? REF_NORMAL : 0, &data->extra_have);
 512         data->got_remote_heads = 1;
 513
 514         return refs;
 515 }
 516
 517 static int fetch_refs_via_pack(struct transport *transport,
 518                                int nr_heads, struct ref **to_fetch)
 519 {
 520         struct git_transport_data *data = transport->data;
 521         char **heads = xmalloc(nr_heads * sizeof(*heads));
 522         char **origh = xmalloc(nr_heads * sizeof(*origh));
 523         const struct ref *refs;
 524         char *dest = xstrdup(transport->url);
 525         struct fetch_pack_args args;
 526         int i;
 527         struct ref *refs_tmp = NULL;
 528
 529         memset(&args, 0, sizeof(args));
 530         args.uploadpack = data->options.uploadpack;
 531         args.keep_pack = data->options.keep;
 532         args.lock_pack = 1;
 533         args.use_thin_pack = data->options.thin;
 534         args.include_tag = data->options.followtags;
 535         args.verbose = (transport->verbose > 1);
 536         args.quiet = (transport->verbose < 0);
 537         args.no_progress = !transport->progress;
 538         args.depth = data->options.depth;
 539
 540         for (i = 0; i < nr_heads; i++)
 541                 origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 542
 543         if (!data->got_remote_heads) {
 544                 connect_setup(transport, 0, 0);
 545                 get_remote_heads(data->fd[0], &refs_tmp, 0, NULL);
 546                 data->got_remote_heads = 1;
 547         }
 548
 549         refs = fetch_pack(&args, data->fd, data->conn,
 550                           refs_tmp ? refs_tmp : transport->remote_refs,
 551                           dest, nr_heads, heads, &transport->pack_lockfile);
 552         close(data->fd[0]);
 553         close(data->fd[1]);
 554         if (finish_connect(data->conn))
 555                 refs = NULL;
 556         data->conn = NULL;
 557         data->got_remote_heads = 0;
 558
 559         free_refs(refs_tmp);
 560
 561         for (i = 0; i < nr_heads; i++)
 562                 free(origh[i]);
 563         free(origh);
 564         free(heads);
 565         free(dest);
 566         return (refs ? 0 : -1);
 567 }
 568
 569 static int push_had_errors(struct ref *ref)
 570 {
 571         for (; ref; ref = ref->next) {
 572                 switch (ref->status) {
 573                 case REF_STATUS_NONE:
 574                 case REF_STATUS_UPTODATE:
 575                 case REF_STATUS_OK:
 576                         break;
 577                 default:
 578                         return 1;
 579                 }
 580         }
 581         return 0;
 582 }
 583
 584 int transport_refs_pushed(struct ref *ref)
 585 {
 586         for (; ref; ref = ref->next) {
 587                 switch(ref->status) {
 588                 case REF_STATUS_NONE:
 589                 case REF_STATUS_UPTODATE:
 590                         break;
 591                 default:
 592                         return 1;
 593                 }
 594         }
 595         return 0;
 596 }
 597
 598 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 599 {
 600         struct refspec rs;
 601
 602         if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 603                 return;
 604
 605         rs.src = ref->name;
 606         rs.dst = NULL;
 607
 608         if (!remote_find_tracking(remote, &rs)) {
 609                 if (verbose)
 610                         fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 611                 if (ref->deletion) {
 612                         delete_ref(rs.dst, NULL, 0);
 613                 } else
 614                         update_ref("update by push", rs.dst,
 615                                         ref->new_sha1, NULL, 0, 0);
 616                 free(rs.dst);
 617         }
 618 }
 619
 620 static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 621 {
 622         if (porcelain) {
 623                 if (from)
 624                         fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 625                 else
 626                         fprintf(stdout, "%c\t:%s\t", flag, to->name);
 627                 if (msg)
 628                         fprintf(stdout, "%s (%s)\n", summary, msg);
 629                 else
 630                         fprintf(stdout, "%s\n", summary);
 631         } else {
 632                 fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 633                 if (from)
 634                         fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 635                 else
 636                         fputs(prettify_refname(to->name), stderr);
 637                 if (msg) {
 638                         fputs(" (", stderr);
 639                         fputs(msg, stderr);
 640                         fputc(')', stderr);
 641                 }
 642                 fputc('\n', stderr);
 643         }
 644 }
 645
 646 static const char *status_abbrev(unsigned char sha1[20])
 647 {
 648         return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 649 }
 650
 651 static void print_ok_ref_status(struct ref *ref, int porcelain)
 652 {
 653         if (ref->deletion)
 654                 print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 655         else if (is_null_sha1(ref->old_sha1))
 656                 print_ref_status('*',
 657                         (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 658                         "[new branch]"),
 659                         ref, ref->peer_ref, NULL, porcelain);
 660         else {
 661                 char quickref[84];
 662                 char type;
 663                 const char *msg;
 664
 665                 strcpy(quickref, status_abbrev(ref->old_sha1));
 666                 if (ref->nonfastforward) {
 667                         strcat(quickref, "...");
 668                         type = '+';
 669                         msg = "forced update";
 670                 } else {
 671                         strcat(quickref, "..");
 672                         type = ' ';
 673                         msg = NULL;
 674                 }
 675                 strcat(quickref, status_abbrev(ref->new_sha1));
 676
 677                 print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 678         }
 679 }
 680
 681 static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 682 {
 683         if (!count)
 684                 fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
 685
 686         switch(ref->status) {
 687         case REF_STATUS_NONE:
 688                 print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 689                 break;
 690         case REF_STATUS_REJECT_NODELETE:
 691                 print_ref_status('!', "[rejected]", ref, NULL,
 692                                                  "remote does not support deleting refs", porcelain);
 693                 break;
 694         case REF_STATUS_UPTODATE:
 695                 print_ref_status('=', "[up to date]", ref,
 696                                                  ref->peer_ref, NULL, porcelain);
 697                 break;
 698         case REF_STATUS_REJECT_NONFASTFORWARD:
 699                 print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 700                                                  "non-fast-forward", porcelain);
 701                 break;
 702         case REF_STATUS_REMOTE_REJECT:
 703                 print_ref_status('!', "[remote rejected]", ref,
 704                                                  ref->deletion ? NULL : ref->peer_ref,
 705                                                  ref->remote_status, porcelain);
 706                 break;
 707         case REF_STATUS_EXPECTING_REPORT:
 708                 print_ref_status('!', "[remote failure]", ref,
 709                                                  ref->deletion ? NULL : ref->peer_ref,
 710                                                  "remote failed to report status", porcelain);
 711                 break;
 712         case REF_STATUS_OK:
 713                 print_ok_ref_status(ref, porcelain);
 714                 break;
 715         }
 716
 717         return 1;
 718 }
 719
 720 void transport_print_push_status(const char *dest, struct ref *refs,
 721                                   int verbose, int porcelain, int *nonfastforward)
 722 {
 723         struct ref *ref;
 724         int n = 0;
 725
 726         if (verbose) {
 727                 for (ref = refs; ref; ref = ref->next)
 728                         if (ref->status == REF_STATUS_UPTODATE)
 729                                 n += print_one_push_status(ref, dest, n, porcelain);
 730         }
 731
 732         for (ref = refs; ref; ref = ref->next)
 733                 if (ref->status == REF_STATUS_OK)
 734                         n += print_one_push_status(ref, dest, n, porcelain);
 735
 736         *nonfastforward = 0;
 737         for (ref = refs; ref; ref = ref->next) {
 738                 if (ref->status != REF_STATUS_NONE &&
 739                     ref->status != REF_STATUS_UPTODATE &&
 740                     ref->status != REF_STATUS_OK)
 741                         n += print_one_push_status(ref, dest, n, porcelain);
 742                 if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 743                         *nonfastforward = 1;
 744         }
 745 }
 746
 747 void transport_verify_remote_names(int nr_heads, const char **heads)
 748 {
 749         int i;
 750
 751         for (i = 0; i < nr_heads; i++) {
 752                 const char *local = heads[i];
 753                 const char *remote = strrchr(heads[i], ':');
 754
 755                 if (*local == '+')
 756                         local++;
 757
 758                 /* A matching refspec is okay.  */
 759                 if (remote == local && remote[1] == '\0')
 760                         continue;
 761
 762                 remote = remote ? (remote + 1) : local;
 763                 if (check_refname_format(remote,
 764                                 REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 765                         die("remote part of refspec is not a valid name in %s",
 766                                 heads[i]);
 767         }
 768 }
 769
 770 static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 771 {
 772         struct git_transport_data *data = transport->data;
 773         struct send_pack_args args;
 774         int ret;
 775
 776         if (!data->got_remote_heads) {
 777                 struct ref *tmp_refs;
 778                 connect_setup(transport, 1, 0);
 779
 780                 get_remote_heads(data->fd[0], &tmp_refs, REF_NORMAL, NULL);
 781                 data->got_remote_heads = 1;
 782         }
 783
 784         memset(&args, 0, sizeof(args));
 785         args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 786         args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 787         args.use_thin_pack = data->options.thin;
 788         args.verbose = (transport->verbose > 0);
 789         args.quiet = (transport->verbose < 0);
 790         args.progress = transport->progress;
 791         args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 792         args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 793
 794         ret = send_pack(&args, data->fd, data->conn, remote_refs,
 795                         &data->extra_have);
 796
 797         close(data->fd[1]);
 798         close(data->fd[0]);
 799         ret |= finish_connect(data->conn);
 800         data->conn = NULL;
 801         data->got_remote_heads = 0;
 802
 803         return ret;
 804 }
 805
 806 static int connect_git(struct transport *transport, const char *name,
 807                        const char *executable, int fd[2])
 808 {
 809         struct git_transport_data *data = transport->data;
 810         data->conn = git_connect(data->fd, transport->url,
 811                                  executable, 0);
 812         fd[0] = data->fd[0];
 813         fd[1] = data->fd[1];
 814         return 0;
 815 }
 816
 817 static int disconnect_git(struct transport *transport)
 818 {
 819         struct git_transport_data *data = transport->data;
 820         if (data->conn) {
 821                 if (data->got_remote_heads)
 822                         packet_flush(data->fd[1]);
 823                 close(data->fd[0]);
 824                 close(data->fd[1]);
 825                 finish_connect(data->conn);
 826         }
 827
 828         free(data);
 829         return 0;
 830 }
 831
 832 void transport_take_over(struct transport *transport,
 833                          struct child_process *child)
 834 {
 835         struct git_transport_data *data;
 836
 837         if (!transport->smart_options)
 838                 die("Bug detected: Taking over transport requires non-NULL "
 839                     "smart_options field.");
 840
 841         data = xcalloc(1, sizeof(*data));
 842         data->options = *transport->smart_options;
 843         data->conn = child;
 844         data->fd[0] = data->conn->out;
 845         data->fd[1] = data->conn->in;
 846         data->got_remote_heads = 0;
 847         transport->data = data;
 848
 849         transport->set_option = NULL;
 850         transport->get_refs_list = get_refs_via_connect;
 851         transport->fetch = fetch_refs_via_pack;
 852         transport->push = NULL;
 853         transport->push_refs = git_transport_push;
 854         transport->disconnect = disconnect_git;
 855         transport->smart_options = &(data->options);
 856 }
 857
 858 static int is_local(const char *url)
 859 {
 860         const char *colon = strchr(url, ':');
 861         const char *slash = strchr(url, '/');
 862         return !colon || (slash && slash < colon) ||
 863                 has_dos_drive_prefix(url);
 864 }
 865
 866 static int is_file(const char *url)
 867 {
 868         struct stat buf;
 869         if (stat(url, &buf))
 870                 return 0;
 871         return S_ISREG(buf.st_mode);
 872 }
 873
 874 static int external_specification_len(const char *url)
 875 {
 876         return strchr(url, ':') - url;
 877 }
 878
 879 struct transport *transport_get(struct remote *remote, const char *url)
 880 {
 881         const char *helper;
 882         struct transport *ret = xcalloc(1, sizeof(*ret));
 883
 884         ret->progress = isatty(2);
 885
 886         if (!remote)
 887                 die("No remote provided to transport_get()");
 888
 889         ret->got_remote_refs = 0;
 890         ret->remote = remote;
 891         helper = remote->foreign_vcs;
 892
 893         if (!url && remote->url)
 894                 url = remote->url[0];
 895         ret->url = url;
 896
 897         /* maybe it is a foreign URL? */
 898         if (url) {
 899                 const char *p = url;
 900
 901                 while (is_urlschemechar(p == url, *p))
 902                         p++;
 903                 if (!prefixcmp(p, "::"))
 904                         helper = xstrndup(url, p - url);
 905         }
 906
 907         if (helper) {
 908                 transport_helper_init(ret, helper);
 909         } else if (!prefixcmp(url, "rsync:")) {
 910                 ret->get_refs_list = get_refs_via_rsync;
 911                 ret->fetch = fetch_objs_via_rsync;
 912                 ret->push = rsync_transport_push;
 913                 ret->smart_options = NULL;
 914         } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
 915                 struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 916                 ret->data = data;
 917                 ret->get_refs_list = get_refs_from_bundle;
 918                 ret->fetch = fetch_refs_from_bundle;
 919                 ret->disconnect = close_bundle;
 920                 ret->smart_options = NULL;
 921         } else if (!is_url(url)
 922                 || !prefixcmp(url, "file://")
 923                 || !prefixcmp(url, "git://")
 924                 || !prefixcmp(url, "ssh://")
 925                 || !prefixcmp(url, "git+ssh://")
 926                 || !prefixcmp(url, "ssh+git://")) {
 927                 /* These are builtin smart transports. */
 928                 struct git_transport_data *data = xcalloc(1, sizeof(*data));
 929                 ret->data = data;
 930                 ret->set_option = NULL;
 931                 ret->get_refs_list = get_refs_via_connect;
 932                 ret->fetch = fetch_refs_via_pack;
 933                 ret->push_refs = git_transport_push;
 934                 ret->connect = connect_git;
 935                 ret->disconnect = disconnect_git;
 936                 ret->smart_options = &(data->options);
 937
 938                 data->conn = NULL;
 939                 data->got_remote_heads = 0;
 940         } else {
 941                 /* Unknown protocol in URL. Pass to external handler. */
 942                 int len = external_specification_len(url);
 943                 char *handler = xmalloc(len + 1);
 944                 handler[len] = 0;
 945                 strncpy(handler, url, len);
 946                 transport_helper_init(ret, handler);
 947         }
 948
 949         if (ret->smart_options) {
 950                 ret->smart_options->thin = 1;
 951                 ret->smart_options->uploadpack = "git-upload-pack";
 952                 if (remote->uploadpack)
 953                         ret->smart_options->uploadpack = remote->uploadpack;
 954                 ret->smart_options->receivepack = "git-receive-pack";
 955                 if (remote->receivepack)
 956                         ret->smart_options->receivepack = remote->receivepack;
 957         }
 958
 959         return ret;
 960 }
 961
 962 int transport_set_option(struct transport *transport,
 963                          const char *name, const char *value)
 964 {
 965         int git_reports = 1, protocol_reports = 1;
 966
 967         if (transport->smart_options)
 968                 git_reports = set_git_option(transport->smart_options,
 969                                              name, value);
 970
 971         if (transport->set_option)
 972                 protocol_reports = transport->set_option(transport, name,
 973                                                         value);
 974
 975         /* If either report is 0, report 0 (success). */
 976         if (!git_reports || !protocol_reports)
 977                 return 0;
 978         /* If either reports -1 (invalid value), report -1. */
 979         if ((git_reports == -1) || (protocol_reports == -1))
 980                 return -1;
 981         /* Otherwise if both report unknown, report unknown. */
 982         return 1;
 983 }
 984
 985 void transport_set_verbosity(struct transport *transport, int verbosity,
 986         int force_progress)
 987 {
 988         if (verbosity >= 1)
 989                 transport->verbose = verbosity <= 3 ? verbosity : 3;
 990         if (verbosity < 0)
 991                 transport->verbose = -1;
 992
 993         /**
 994          * Rules used to determine whether to report progress (processing aborts
 995          * when a rule is satisfied):
 996          *
 997          *   1. Report progress, if force_progress is 1 (ie. --progress).
 998          *   2. Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 999          *   3. Report progress if isatty(2) is 1.
1000          **/
1001         transport->progress = force_progress || (verbosity >= 0 && isatty(2));
1002 }
1003
1004 static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1005 {
1006         int i;
1007
1008         fprintf(stderr, "The following submodule paths contain changes that can\n"
1009                         "not be found on any remote:\n");
1010         for (i = 0; i < needs_pushing->nr; i++)
1011                 printf("  %s\n", needs_pushing->items[i].string);
1012         fprintf(stderr, "\nPlease try\n\n"
1013                         "       git push --recurse-submodules=on-demand\n\n"
1014                         "or cd to the path and use\n\n"
1015                         "       git push\n\n"
1016                         "to push them to a remote.\n\n");
1017
1018         string_list_clear(needs_pushing, 0);
1019
1020         die("Aborting.");
1021 }
1022
1023 int transport_push(struct transport *transport,
1024                    int refspec_nr, const char **refspec, int flags,
1025                    int *nonfastforward)
1026 {
1027         *nonfastforward = 0;
1028         transport_verify_remote_names(refspec_nr, refspec);
1029
1030         if (transport->push) {
1031                 /* Maybe FIXME. But no important transport uses this case. */
1032                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1033                         die("This transport does not support using --set-upstream");
1034
1035                 return transport->push(transport, refspec_nr, refspec, flags);
1036         } else if (transport->push_refs) {
1037                 struct ref *remote_refs =
1038                         transport->get_refs_list(transport, 1);
1039                 struct ref *local_refs = get_local_heads();
1040                 int match_flags = MATCH_REFS_NONE;
1041                 int verbose = (transport->verbose > 0);
1042                 int quiet = (transport->verbose < 0);
1043                 int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1044                 int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1045                 int push_ret, ret, err;
1046
1047                 if (flags & TRANSPORT_PUSH_ALL)
1048                         match_flags |= MATCH_REFS_ALL;
1049                 if (flags & TRANSPORT_PUSH_MIRROR)
1050                         match_flags |= MATCH_REFS_MIRROR;
1051
1052                 if (match_push_refs(local_refs, &remote_refs,
1053                                     refspec_nr, refspec, match_flags)) {
1054                         return -1;
1055                 }
1056
1057                 set_ref_status_for_push(remote_refs,
1058                         flags & TRANSPORT_PUSH_MIRROR,
1059                         flags & TRANSPORT_PUSH_FORCE);
1060
1061                 if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1062                         struct ref *ref = remote_refs;
1063                         for (; ref; ref = ref->next)
1064                                 if (!is_null_sha1(ref->new_sha1) &&
1065                                     !push_unpushed_submodules(ref->new_sha1,
1066                                             transport->remote->name))
1067                                     die ("Failed to push all needed submodules!");
1068                 }
1069
1070                 if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1071                               TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1072                         struct ref *ref = remote_refs;
1073                         struct string_list needs_pushing;
1074
1075                         memset(&needs_pushing, 0, sizeof(struct string_list));
1076                         needs_pushing.strdup_strings = 1;
1077                         for (; ref; ref = ref->next)
1078                                 if (!is_null_sha1(ref->new_sha1) &&
1079                                     find_unpushed_submodules(ref->new_sha1,
1080                                             transport->remote->name, &needs_pushing))
1081                                         die_with_unpushed_submodules(&needs_pushing);
1082                 }
1083
1084                 push_ret = transport->push_refs(transport, remote_refs, flags);
1085                 err = push_had_errors(remote_refs);
1086                 ret = push_ret | err;
1087
1088                 if (!quiet || err)
1089                         transport_print_push_status(transport->url, remote_refs,
1090                                         verbose | porcelain, porcelain,
1091                                         nonfastforward);
1092
1093                 if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1094                         set_upstreams(transport, remote_refs, pretend);
1095
1096                 if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1097                         struct ref *ref;
1098                         for (ref = remote_refs; ref; ref = ref->next)
1099                                 transport_update_tracking_ref(transport->remote, ref, verbose);
1100                 }
1101
1102                 if (porcelain && !push_ret)
1103                         puts("Done");
1104                 else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1105                         fprintf(stderr, "Everything up-to-date\n");
1106
1107                 return ret;
1108         }
1109         return 1;
1110 }
1111
1112 const struct ref *transport_get_remote_refs(struct transport *transport)
1113 {
1114         if (!transport->got_remote_refs) {
1115                 transport->remote_refs = transport->get_refs_list(transport, 0);
1116                 transport->got_remote_refs = 1;
1117         }
1118
1119         return transport->remote_refs;
1120 }
1121
1122 int transport_fetch_refs(struct transport *transport, struct ref *refs)
1123 {
1124         int rc;
1125         int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1126         struct ref **heads = NULL;
1127         struct ref *rm;
1128
1129         for (rm = refs; rm; rm = rm->next) {
1130                 nr_refs++;
1131                 if (rm->peer_ref &&
1132                     !is_null_sha1(rm->old_sha1) &&
1133                     !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1134                         continue;
1135                 ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1136                 heads[nr_heads++] = rm;
1137         }
1138
1139         if (!nr_heads) {
1140                 /*
1141                  * When deepening of a shallow repository is requested,
1142                  * then local and remote refs are likely to still be equal.
1143                  * Just feed them all to the fetch method in that case.
1144                  * This condition shouldn't be met in a non-deepening fetch
1145                  * (see builtin-fetch.c:quickfetch()).
1146                  */
1147                 heads = xmalloc(nr_refs * sizeof(*heads));
1148                 for (rm = refs; rm; rm = rm->next)
1149                         heads[nr_heads++] = rm;
1150         }
1151
1152         rc = transport->fetch(transport, nr_heads, heads);
1153
1154         free(heads);
1155         return rc;
1156 }
1157
1158 void transport_unlock_pack(struct transport *transport)
1159 {
1160         if (transport->pack_lockfile) {
1161                 unlink_or_warn(transport->pack_lockfile);
1162                 free(transport->pack_lockfile);
1163                 transport->pack_lockfile = NULL;
1164         }
1165 }
1166
1167 int transport_connect(struct transport *transport, const char *name,
1168                       const char *exec, int fd[2])
1169 {
1170         if (transport->connect)
1171                 return transport->connect(transport, name, exec, fd);
1172         else
1173                 die("Operation not supported by protocol");
1174 }
1175
1176 int transport_disconnect(struct transport *transport)
1177 {
1178         int ret = 0;
1179         if (transport->disconnect)
1180                 ret = transport->disconnect(transport);
1181         free(transport);
1182         return ret;
1183 }
1184
1185 /*
1186  * Strip username (and password) from an url and return
1187  * it in a newly allocated string.
1188  */
1189 char *transport_anonymize_url(const char *url)
1190 {
1191         char *anon_url, *scheme_prefix, *anon_part;
1192         size_t anon_len, prefix_len = 0;
1193
1194         anon_part = strchr(url, '@');
1195         if (is_local(url) || !anon_part)
1196                 goto literal_copy;
1197
1198         anon_len = strlen(++anon_part);
1199         scheme_prefix = strstr(url, "://");
1200         if (!scheme_prefix) {
1201                 if (!strchr(anon_part, ':'))
1202                         /* cannot be "me@there:/path/name" */
1203                         goto literal_copy;
1204         } else {
1205                 const char *cp;
1206                 /* make sure scheme is reasonable */
1207                 for (cp = url; cp < scheme_prefix; cp++) {
1208                         switch (*cp) {
1209                                 /* RFC 1738 2.1 */
1210                         case '+': case '.': case '-':
1211                                 break; /* ok */
1212                         default:
1213                                 if (isalnum(*cp))
1214                                         break;
1215                                 /* it isn't */
1216                                 goto literal_copy;
1217                         }
1218                 }
1219                 /* @ past the first slash does not count */
1220                 cp = strchr(scheme_prefix + 3, '/');
1221                 if (cp && cp < anon_part)
1222                         goto literal_copy;
1223                 prefix_len = scheme_prefix - url + 3;
1224         }
1225         anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1226         memcpy(anon_url, url, prefix_len);
1227         memcpy(anon_url + prefix_len, anon_part, anon_len);
1228         return anon_url;
1229 literal_copy:
1230         return xstrdup(url);
1231 }
1232
1233 struct alternate_refs_data {
1234         alternate_ref_fn *fn;
1235         void *data;
1236 };
1237
1238 static int refs_from_alternate_cb(struct alternate_object_database *e,
1239                                   void *data)
1240 {
1241         char *other;
1242         size_t len;
1243         struct remote *remote;
1244         struct transport *transport;
1245         const struct ref *extra;
1246         struct alternate_refs_data *cb = data;
1247
1248         e->name[-1] = '\0';
1249         other = xstrdup(real_path(e->base));
1250         e->name[-1] = '/';
1251         len = strlen(other);
1252
1253         while (other[len-1] == '/')
1254                 other[--len] = '\0';
1255         if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1256                 return 0;
1257         /* Is this a git repository with refs? */
1258         memcpy(other + len - 8, "/refs", 6);
1259         if (!is_directory(other))
1260                 return 0;
1261         other[len - 8] = '\0';
1262         remote = remote_get(other);
1263         transport = transport_get(remote, other);
1264         for (extra = transport_get_remote_refs(transport);
1265              extra;
1266              extra = extra->next)
1267                 cb->fn(extra, cb->data);
1268         transport_disconnect(transport);
1269         free(other);
1270         return 0;
1271 }
1272
1273 void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1274 {
1275         struct alternate_refs_data cb;
1276         cb.fn = fn;
1277         cb.data = data;
1278         foreach_alt_odb(refs_from_alternate_cb, &cb);
1279 }