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