builtin/send-pack.c

   1 #include "builtin.h"
   2 #include "commit.h"
   3 #include "refs.h"
   4 #include "pkt-line.h"
   5 #include "sideband.h"
   6 #include "run-command.h"
   7 #include "remote.h"
   8 #include "send-pack.h"
   9 #include "quote.h"
  10 #include "transport.h"
  11 #include "version.h"
  12
  13 static const char send_pack_usage[] =
  14 "git send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
  15 "  --all and explicit <ref> specification are mutually exclusive.";
  16
  17 static struct send_pack_args args;
  18
  19 static int feed_object(const unsigned char *sha1, int fd, int negative)
  20 {
  21         char buf[42];
  22
  23         if (negative && !has_sha1_file(sha1))
  24                 return 1;
  25
  26         memcpy(buf + negative, sha1_to_hex(sha1), 40);
  27         if (negative)
  28                 buf[0] = '^';
  29         buf[40 + negative] = '\n';
  30         return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
  31 }
  32
  33 /*
  34  * Make a pack stream and spit it out into file descriptor fd
  35  */
  36 static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
  37 {
  38         /*
  39          * The child becomes pack-objects --revs; we feed
  40          * the revision parameters to it via its stdin and
  41          * let its stdout go back to the other end.
  42          */
  43         const char *argv[] = {
  44                 "pack-objects",
  45                 "--all-progress-implied",
  46                 "--revs",
  47                 "--stdout",
  48                 NULL,
  49                 NULL,
  50                 NULL,
  51                 NULL,
  52                 NULL,
  53         };
  54         struct child_process po;
  55         int i;
  56
  57         i = 4;
  58         if (args->use_thin_pack)
  59                 argv[i++] = "--thin";
  60         if (args->use_ofs_delta)
  61                 argv[i++] = "--delta-base-offset";
  62         if (args->quiet || !args->progress)
  63                 argv[i++] = "-q";
  64         if (args->progress)
  65                 argv[i++] = "--progress";
  66         memset(&po, 0, sizeof(po));
  67         po.argv = argv;
  68         po.in = -1;
  69         po.out = args->stateless_rpc ? -1 : fd;
  70         po.git_cmd = 1;
  71         if (start_command(&po))
  72                 die_errno("git pack-objects failed");
  73
  74         /*
  75          * We feed the pack-objects we just spawned with revision
  76          * parameters by writing to the pipe.
  77          */
  78         for (i = 0; i < extra->nr; i++)
  79                 if (!feed_object(extra->array[i], po.in, 1))
  80                         break;
  81
  82         while (refs) {
  83                 if (!is_null_sha1(refs->old_sha1) &&
  84                     !feed_object(refs->old_sha1, po.in, 1))
  85                         break;
  86                 if (!is_null_sha1(refs->new_sha1) &&
  87                     !feed_object(refs->new_sha1, po.in, 0))
  88                         break;
  89                 refs = refs->next;
  90         }
  91
  92         close(po.in);
  93
  94         if (args->stateless_rpc) {
  95                 char *buf = xmalloc(LARGE_PACKET_MAX);
  96                 while (1) {
  97                         ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
  98                         if (n <= 0)
  99                                 break;
 100                         send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
 101                 }
 102                 free(buf);
 103                 close(po.out);
 104                 po.out = -1;
 105         }
 106
 107         if (finish_command(&po))
 108                 return -1;
 109         return 0;
 110 }
 111
 112 static int receive_status(int in, struct ref *refs)
 113 {
 114         struct ref *hint;
 115         char line[1000];
 116         int ret = 0;
 117         int len = packet_read_line(in, line, sizeof(line));
 118         if (len < 10 || memcmp(line, "unpack ", 7))
 119                 return error("did not receive remote status");
 120         if (memcmp(line, "unpack ok\n", 10)) {
 121                 char *p = line + strlen(line) - 1;
 122                 if (*p == '\n')
 123                         *p = '\0';
 124                 error("unpack failed: %s", line + 7);
 125                 ret = -1;
 126         }
 127         hint = NULL;
 128         while (1) {
 129                 char *refname;
 130                 char *msg;
 131                 len = packet_read_line(in, line, sizeof(line));
 132                 if (!len)
 133                         break;
 134                 if (len < 3 ||
 135                     (memcmp(line, "ok ", 3) && memcmp(line, "ng ", 3))) {
 136                         fprintf(stderr, "protocol error: %s\n", line);
 137                         ret = -1;
 138                         break;
 139                 }
 140
 141                 line[strlen(line)-1] = '\0';
 142                 refname = line + 3;
 143                 msg = strchr(refname, ' ');
 144                 if (msg)
 145                         *msg++ = '\0';
 146
 147                 /* first try searching at our hint, falling back to all refs */
 148                 if (hint)
 149                         hint = find_ref_by_name(hint, refname);
 150                 if (!hint)
 151                         hint = find_ref_by_name(refs, refname);
 152                 if (!hint) {
 153                         warning("remote reported status on unknown ref: %s",
 154                                         refname);
 155                         continue;
 156                 }
 157                 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
 158                         warning("remote reported status on unexpected ref: %s",
 159                                         refname);
 160                         continue;
 161                 }
 162
 163                 if (line[0] == 'o' && line[1] == 'k')
 164                         hint->status = REF_STATUS_OK;
 165                 else {
 166                         hint->status = REF_STATUS_REMOTE_REJECT;
 167                         ret = -1;
 168                 }
 169                 if (msg)
 170                         hint->remote_status = xstrdup(msg);
 171                 /* start our next search from the next ref */
 172                 hint = hint->next;
 173         }
 174         return ret;
 175 }
 176
 177 static void print_helper_status(struct ref *ref)
 178 {
 179         struct strbuf buf = STRBUF_INIT;
 180
 181         for (; ref; ref = ref->next) {
 182                 const char *msg = NULL;
 183                 const char *res;
 184
 185                 switch(ref->status) {
 186                 case REF_STATUS_NONE:
 187                         res = "error";
 188                         msg = "no match";
 189                         break;
 190
 191                 case REF_STATUS_OK:
 192                         res = "ok";
 193                         break;
 194
 195                 case REF_STATUS_UPTODATE:
 196                         res = "ok";
 197                         msg = "up to date";
 198                         break;
 199
 200                 case REF_STATUS_REJECT_NONFASTFORWARD:
 201                         res = "error";
 202                         msg = "non-fast forward";
 203                         break;
 204
 205                 case REF_STATUS_REJECT_NODELETE:
 206                 case REF_STATUS_REMOTE_REJECT:
 207                         res = "error";
 208                         break;
 209
 210                 case REF_STATUS_EXPECTING_REPORT:
 211                 default:
 212                         continue;
 213                 }
 214
 215                 strbuf_reset(&buf);
 216                 strbuf_addf(&buf, "%s %s", res, ref->name);
 217                 if (ref->remote_status)
 218                         msg = ref->remote_status;
 219                 if (msg) {
 220                         strbuf_addch(&buf, ' ');
 221                         quote_two_c_style(&buf, "", msg, 0);
 222                 }
 223                 strbuf_addch(&buf, '\n');
 224
 225                 safe_write(1, buf.buf, buf.len);
 226         }
 227         strbuf_release(&buf);
 228 }
 229
 230 static int sideband_demux(int in, int out, void *data)
 231 {
 232         int *fd = data, ret;
 233 #ifdef NO_PTHREADS
 234         close(fd[1]);
 235 #endif
 236         ret = recv_sideband("send-pack", fd[0], out);
 237         close(out);
 238         return ret;
 239 }
 240
 241 int send_pack(struct send_pack_args *args,
 242               int fd[], struct child_process *conn,
 243               struct ref *remote_refs,
 244               struct extra_have_objects *extra_have)
 245 {
 246         int in = fd[0];
 247         int out = fd[1];
 248         struct strbuf req_buf = STRBUF_INIT;
 249         struct ref *ref;
 250         int new_refs;
 251         int allow_deleting_refs = 0;
 252         int status_report = 0;
 253         int use_sideband = 0;
 254         int quiet_supported = 0;
 255         unsigned cmds_sent = 0;
 256         int ret;
 257         struct async demux;
 258
 259         /* Does the other end support the reporting? */
 260         if (server_supports("report-status"))
 261                 status_report = 1;
 262         if (server_supports("delete-refs"))
 263                 allow_deleting_refs = 1;
 264         if (server_supports("ofs-delta"))
 265                 args->use_ofs_delta = 1;
 266         if (server_supports("side-band-64k"))
 267                 use_sideband = 1;
 268         if (server_supports("quiet"))
 269                 quiet_supported = 1;
 270
 271         if (!remote_refs) {
 272                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
 273                         "Perhaps you should specify a branch such as 'master'.\n");
 274                 return 0;
 275         }
 276
 277         /*
 278          * Finally, tell the other end!
 279          */
 280         new_refs = 0;
 281         for (ref = remote_refs; ref; ref = ref->next) {
 282                 if (!ref->peer_ref && !args->send_mirror)
 283                         continue;
 284
 285                 /* Check for statuses set by set_ref_status_for_push() */
 286                 switch (ref->status) {
 287                 case REF_STATUS_REJECT_NONFASTFORWARD:
 288                 case REF_STATUS_UPTODATE:
 289                         continue;
 290                 default:
 291                         ; /* do nothing */
 292                 }
 293
 294                 if (ref->deletion && !allow_deleting_refs) {
 295                         ref->status = REF_STATUS_REJECT_NODELETE;
 296                         continue;
 297                 }
 298
 299                 if (!ref->deletion)
 300                         new_refs++;
 301
 302                 if (args->dry_run) {
 303                         ref->status = REF_STATUS_OK;
 304                 } else {
 305                         char *old_hex = sha1_to_hex(ref->old_sha1);
 306                         char *new_hex = sha1_to_hex(ref->new_sha1);
 307                         int quiet = quiet_supported && (args->quiet || !args->progress);
 308
 309                         if (!cmds_sent && (status_report || use_sideband || quiet)) {
 310                                 packet_buf_write(&req_buf,
 311                                                  "%s %s %s%c%s%s%s agent=%s",
 312                                                  old_hex, new_hex, ref->name, 0,
 313                                                  status_report ? " report-status" : "",
 314                                                  use_sideband ? " side-band-64k" : "",
 315                                                  quiet ? " quiet" : "",
 316                                                  git_user_agent_sanitized());
 317                         }
 318                         else
 319                                 packet_buf_write(&req_buf, "%s %s %s",
 320                                                  old_hex, new_hex, ref->name);
 321                         ref->status = status_report ?
 322                                 REF_STATUS_EXPECTING_REPORT :
 323                                 REF_STATUS_OK;
 324                         cmds_sent++;
 325                 }
 326         }
 327
 328         if (args->stateless_rpc) {
 329                 if (!args->dry_run && cmds_sent) {
 330                         packet_buf_flush(&req_buf);
 331                         send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
 332                 }
 333         } else {
 334                 safe_write(out, req_buf.buf, req_buf.len);
 335                 packet_flush(out);
 336         }
 337         strbuf_release(&req_buf);
 338
 339         if (use_sideband && cmds_sent) {
 340                 memset(&demux, 0, sizeof(demux));
 341                 demux.proc = sideband_demux;
 342                 demux.data = fd;
 343                 demux.out = -1;
 344                 if (start_async(&demux))
 345                         die("send-pack: unable to fork off sideband demultiplexer");
 346                 in = demux.out;
 347         }
 348
 349         if (new_refs && cmds_sent) {
 350                 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
 351                         for (ref = remote_refs; ref; ref = ref->next)
 352                                 ref->status = REF_STATUS_NONE;
 353                         if (args->stateless_rpc)
 354                                 close(out);
 355                         if (git_connection_is_socket(conn))
 356                                 shutdown(fd[0], SHUT_WR);
 357                         if (use_sideband)
 358                                 finish_async(&demux);
 359                         return -1;
 360                 }
 361         }
 362         if (args->stateless_rpc && cmds_sent)
 363                 packet_flush(out);
 364
 365         if (status_report && cmds_sent)
 366                 ret = receive_status(in, remote_refs);
 367         else
 368                 ret = 0;
 369         if (args->stateless_rpc)
 370                 packet_flush(out);
 371
 372         if (use_sideband && cmds_sent) {
 373                 if (finish_async(&demux)) {
 374                         error("error in sideband demultiplexer");
 375                         ret = -1;
 376                 }
 377                 close(demux.out);
 378         }
 379
 380         if (ret < 0)
 381                 return ret;
 382
 383         if (args->porcelain)
 384                 return 0;
 385
 386         for (ref = remote_refs; ref; ref = ref->next) {
 387                 switch (ref->status) {
 388                 case REF_STATUS_NONE:
 389                 case REF_STATUS_UPTODATE:
 390                 case REF_STATUS_OK:
 391                         break;
 392                 default:
 393                         return -1;
 394                 }
 395         }
 396         return 0;
 397 }
 398
 399 int cmd_send_pack(int argc, const char **argv, const char *prefix)
 400 {
 401         int i, nr_refspecs = 0;
 402         const char **refspecs = NULL;
 403         const char *remote_name = NULL;
 404         struct remote *remote = NULL;
 405         const char *dest = NULL;
 406         int fd[2];
 407         struct child_process *conn;
 408         struct extra_have_objects extra_have;
 409         struct ref *remote_refs, *local_refs;
 410         int ret;
 411         int helper_status = 0;
 412         int send_all = 0;
 413         const char *receivepack = "git-receive-pack";
 414         int flags;
 415         int nonfastforward = 0;
 416         int progress = -1;
 417
 418         argv++;
 419         for (i = 1; i < argc; i++, argv++) {
 420                 const char *arg = *argv;
 421
 422                 if (*arg == '-') {
 423                         if (!prefixcmp(arg, "--receive-pack=")) {
 424                                 receivepack = arg + 15;
 425                                 continue;
 426                         }
 427                         if (!prefixcmp(arg, "--exec=")) {
 428                                 receivepack = arg + 7;
 429                                 continue;
 430                         }
 431                         if (!prefixcmp(arg, "--remote=")) {
 432                                 remote_name = arg + 9;
 433                                 continue;
 434                         }
 435                         if (!strcmp(arg, "--all")) {
 436                                 send_all = 1;
 437                                 continue;
 438                         }
 439                         if (!strcmp(arg, "--dry-run")) {
 440                                 args.dry_run = 1;
 441                                 continue;
 442                         }
 443                         if (!strcmp(arg, "--mirror")) {
 444                                 args.send_mirror = 1;
 445                                 continue;
 446                         }
 447                         if (!strcmp(arg, "--force")) {
 448                                 args.force_update = 1;
 449                                 continue;
 450                         }
 451                         if (!strcmp(arg, "--quiet")) {
 452                                 args.quiet = 1;
 453                                 continue;
 454                         }
 455                         if (!strcmp(arg, "--verbose")) {
 456                                 args.verbose = 1;
 457                                 continue;
 458                         }
 459                         if (!strcmp(arg, "--progress")) {
 460                                 progress = 1;
 461                                 continue;
 462                         }
 463                         if (!strcmp(arg, "--no-progress")) {
 464                                 progress = 0;
 465                                 continue;
 466                         }
 467                         if (!strcmp(arg, "--thin")) {
 468                                 args.use_thin_pack = 1;
 469                                 continue;
 470                         }
 471                         if (!strcmp(arg, "--stateless-rpc")) {
 472                                 args.stateless_rpc = 1;
 473                                 continue;
 474                         }
 475                         if (!strcmp(arg, "--helper-status")) {
 476                                 helper_status = 1;
 477                                 continue;
 478                         }
 479                         usage(send_pack_usage);
 480                 }
 481                 if (!dest) {
 482                         dest = arg;
 483                         continue;
 484                 }
 485                 refspecs = (const char **) argv;
 486                 nr_refspecs = argc - i;
 487                 break;
 488         }
 489         if (!dest)
 490                 usage(send_pack_usage);
 491         /*
 492          * --all and --mirror are incompatible; neither makes sense
 493          * with any refspecs.
 494          */
 495         if ((refspecs && (send_all || args.send_mirror)) ||
 496             (send_all && args.send_mirror))
 497                 usage(send_pack_usage);
 498
 499         if (remote_name) {
 500                 remote = remote_get(remote_name);
 501                 if (!remote_has_url(remote, dest)) {
 502                         die("Destination %s is not a uri for %s",
 503                             dest, remote_name);
 504                 }
 505         }
 506
 507         if (progress == -1)
 508                 progress = !args.quiet && isatty(2);
 509         args.progress = progress;
 510
 511         if (args.stateless_rpc) {
 512                 conn = NULL;
 513                 fd[0] = 0;
 514                 fd[1] = 1;
 515         } else {
 516                 conn = git_connect(fd, dest, receivepack,
 517                         args.verbose ? CONNECT_VERBOSE : 0);
 518         }
 519
 520         memset(&extra_have, 0, sizeof(extra_have));
 521
 522         get_remote_heads(fd[0], &remote_refs, REF_NORMAL, &extra_have);
 523
 524         transport_verify_remote_names(nr_refspecs, refspecs);
 525
 526         local_refs = get_local_heads();
 527
 528         flags = MATCH_REFS_NONE;
 529
 530         if (send_all)
 531                 flags |= MATCH_REFS_ALL;
 532         if (args.send_mirror)
 533                 flags |= MATCH_REFS_MIRROR;
 534
 535         /* match them up */
 536         if (match_push_refs(local_refs, &remote_refs, nr_refspecs, refspecs, flags))
 537                 return -1;
 538
 539         set_ref_status_for_push(remote_refs, args.send_mirror,
 540                 args.force_update);
 541
 542         ret = send_pack(&args, fd, conn, remote_refs, &extra_have);
 543
 544         if (helper_status)
 545                 print_helper_status(remote_refs);
 546
 547         close(fd[1]);
 548         close(fd[0]);
 549
 550         ret |= finish_connect(conn);
 551
 552         if (!helper_status)
 553                 transport_print_push_status(dest, remote_refs, args.verbose, 0, &nonfastforward);
 554
 555         if (!args.dry_run && remote) {
 556                 struct ref *ref;
 557                 for (ref = remote_refs; ref; ref = ref->next)
 558                         transport_update_tracking_ref(remote, ref, args.verbose);
 559         }
 560
 561         if (!ret && !transport_refs_pushed(remote_refs))
 562                 fprintf(stderr, "Everything up-to-date\n");
 563
 564         return ret;
 565 }