builtin-send-pack.c

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