Andrew's git - gitweb.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
  12static 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
  16static struct send_pack_args args;
  17
  18static 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 */
  35static 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 -1;
 105        return 0;
 106}
 107
 108static 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
 173static 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
 226static int sideband_demux(int in, int out, void *data)
 227{
 228        int *fd = data;
 229        int ret = recv_sideband("send-pack", fd[0], out);
 230        close(out);
 231        return ret;
 232}
 233
 234int send_pack(struct send_pack_args *args,
 235              int fd[], struct child_process *conn,
 236              struct ref *remote_refs,
 237              struct extra_have_objects *extra_have)
 238{
 239        int in = fd[0];
 240        int out = fd[1];
 241        struct strbuf req_buf = STRBUF_INIT;
 242        struct ref *ref;
 243        int new_refs;
 244        int allow_deleting_refs = 0;
 245        int status_report = 0;
 246        int use_sideband = 0;
 247        unsigned cmds_sent = 0;
 248        int ret;
 249        struct async demux;
 250
 251        /* Does the other end support the reporting? */
 252        if (server_supports("report-status"))
 253                status_report = 1;
 254        if (server_supports("delete-refs"))
 255                allow_deleting_refs = 1;
 256        if (server_supports("ofs-delta"))
 257                args->use_ofs_delta = 1;
 258        if (server_supports("side-band-64k"))
 259                use_sideband = 1;
 260
 261        if (!remote_refs) {
 262                fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
 263                        "Perhaps you should specify a branch such as 'master'.\n");
 264                return 0;
 265        }
 266
 267        /*
 268         * Finally, tell the other end!
 269         */
 270        new_refs = 0;
 271        for (ref = remote_refs; ref; ref = ref->next) {
 272                if (!ref->peer_ref && !args->send_mirror)
 273                        continue;
 274
 275                /* Check for statuses set by set_ref_status_for_push() */
 276                switch (ref->status) {
 277                case REF_STATUS_REJECT_NONFASTFORWARD:
 278                case REF_STATUS_UPTODATE:
 279                        continue;
 280                default:
 281                        ; /* do nothing */
 282                }
 283
 284                if (ref->deletion && !allow_deleting_refs) {
 285                        ref->status = REF_STATUS_REJECT_NODELETE;
 286                        continue;
 287                }
 288
 289                if (!ref->deletion)
 290                        new_refs++;
 291
 292                if (args->dry_run) {
 293                        ref->status = REF_STATUS_OK;
 294                } else {
 295                        char *old_hex = sha1_to_hex(ref->old_sha1);
 296                        char *new_hex = sha1_to_hex(ref->new_sha1);
 297
 298                        if (!cmds_sent && (status_report || use_sideband)) {
 299                                packet_buf_write(&req_buf, "%s %s %s%c%s%s",
 300                                        old_hex, new_hex, ref->name, 0,
 301                                        status_report ? " report-status" : "",
 302                                        use_sideband ? " side-band-64k" : "");
 303                        }
 304                        else
 305                                packet_buf_write(&req_buf, "%s %s %s",
 306                                        old_hex, new_hex, ref->name);
 307                        ref->status = status_report ?
 308                                REF_STATUS_EXPECTING_REPORT :
 309                                REF_STATUS_OK;
 310                        cmds_sent++;
 311                }
 312        }
 313
 314        if (args->stateless_rpc) {
 315                if (!args->dry_run && cmds_sent) {
 316                        packet_buf_flush(&req_buf);
 317                        send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
 318                }
 319        } else {
 320                safe_write(out, req_buf.buf, req_buf.len);
 321                packet_flush(out);
 322        }
 323        strbuf_release(&req_buf);
 324
 325        if (use_sideband && cmds_sent) {
 326                memset(&demux, 0, sizeof(demux));
 327                demux.proc = sideband_demux;
 328                demux.data = fd;
 329                demux.out = -1;
 330                if (start_async(&demux))
 331                        die("receive-pack: unable to fork off sideband demultiplexer");
 332                in = demux.out;
 333        }
 334
 335        if (new_refs && cmds_sent) {
 336                if (pack_objects(out, remote_refs, extra_have, args) < 0) {
 337                        for (ref = remote_refs; ref; ref = ref->next)
 338                                ref->status = REF_STATUS_NONE;
 339                        if (use_sideband)
 340                                finish_async(&demux);
 341                        return -1;
 342                }
 343        }
 344        if (args->stateless_rpc && cmds_sent)
 345                packet_flush(out);
 346
 347        if (status_report && cmds_sent)
 348                ret = receive_status(in, remote_refs);
 349        else
 350                ret = 0;
 351        if (args->stateless_rpc)
 352                packet_flush(out);
 353
 354        if (use_sideband && cmds_sent) {
 355                if (finish_async(&demux)) {
 356                        error("error in sideband demultiplexer");
 357                        ret = -1;
 358                }
 359                close(demux.out);
 360        }
 361
 362        if (ret < 0)
 363                return ret;
 364
 365        if (args->porcelain)
 366                return 0;
 367
 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
 381int 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}