Andrew's git / gitweb.git / transport.c
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transport.con commit Merge branch 'er/doc-fast-import-done' into maint (39e2e02)
   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
  27static 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
  37static 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
 100static 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
 142static 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
 189static const char *rsync_url(const char *url)
 190{
 191        return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 192}
 193
 194static 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
 257static 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
 288static 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
 310static 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
 331static 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
 403struct bundle_transport_data {
 404        int fd;
 405        struct bundle_header header;
 406};
 407
 408static 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
 432static 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
 440static 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
 449struct 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
 457static 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
 489static 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
 504static 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
 517static 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
 569static 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
 584int 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
 598void 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
 620static 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
 646static const char *status_abbrev(unsigned char sha1[20])
 647{
 648        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 649}
 650
 651static 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
 681static 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
 720void 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        unsigned char head_sha1[20];
 726        char *head;
 727
 728        head = resolve_refdup("HEAD", head_sha1, 1, NULL);
 729
 730        if (verbose) {
 731                for (ref = refs; ref; ref = ref->next)
 732                        if (ref->status == REF_STATUS_UPTODATE)
 733                                n += print_one_push_status(ref, dest, n, porcelain);
 734        }
 735
 736        for (ref = refs; ref; ref = ref->next)
 737                if (ref->status == REF_STATUS_OK)
 738                        n += print_one_push_status(ref, dest, n, porcelain);
 739
 740        *nonfastforward = 0;
 741        for (ref = refs; ref; ref = ref->next) {
 742                if (ref->status != REF_STATUS_NONE &&
 743                    ref->status != REF_STATUS_UPTODATE &&
 744                    ref->status != REF_STATUS_OK)
 745                        n += print_one_push_status(ref, dest, n, porcelain);
 746                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD &&
 747                    *nonfastforward != NON_FF_HEAD) {
 748                        if (!strcmp(head, ref->name))
 749                                *nonfastforward = NON_FF_HEAD;
 750                        else
 751                                *nonfastforward = NON_FF_OTHER;
 752                }
 753        }
 754}
 755
 756void transport_verify_remote_names(int nr_heads, const char **heads)
 757{
 758        int i;
 759
 760        for (i = 0; i < nr_heads; i++) {
 761                const char *local = heads[i];
 762                const char *remote = strrchr(heads[i], ':');
 763
 764                if (*local == '+')
 765                        local++;
 766
 767                /* A matching refspec is okay.  */
 768                if (remote == local && remote[1] == '\0')
 769                        continue;
 770
 771                remote = remote ? (remote + 1) : local;
 772                if (check_refname_format(remote,
 773                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 774                        die("remote part of refspec is not a valid name in %s",
 775                                heads[i]);
 776        }
 777}
 778
 779static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 780{
 781        struct git_transport_data *data = transport->data;
 782        struct send_pack_args args;
 783        int ret;
 784
 785        if (!data->got_remote_heads) {
 786                struct ref *tmp_refs;
 787                connect_setup(transport, 1, 0);
 788
 789                get_remote_heads(data->fd[0], &tmp_refs, REF_NORMAL, NULL);
 790                data->got_remote_heads = 1;
 791        }
 792
 793        memset(&args, 0, sizeof(args));
 794        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 795        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 796        args.use_thin_pack = data->options.thin;
 797        args.verbose = (transport->verbose > 0);
 798        args.quiet = (transport->verbose < 0);
 799        args.progress = transport->progress;
 800        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 801        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 802
 803        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 804                        &data->extra_have);
 805
 806        close(data->fd[1]);
 807        close(data->fd[0]);
 808        ret |= finish_connect(data->conn);
 809        data->conn = NULL;
 810        data->got_remote_heads = 0;
 811
 812        return ret;
 813}
 814
 815static int connect_git(struct transport *transport, const char *name,
 816                       const char *executable, int fd[2])
 817{
 818        struct git_transport_data *data = transport->data;
 819        data->conn = git_connect(data->fd, transport->url,
 820                                 executable, 0);
 821        fd[0] = data->fd[0];
 822        fd[1] = data->fd[1];
 823        return 0;
 824}
 825
 826static int disconnect_git(struct transport *transport)
 827{
 828        struct git_transport_data *data = transport->data;
 829        if (data->conn) {
 830                if (data->got_remote_heads)
 831                        packet_flush(data->fd[1]);
 832                close(data->fd[0]);
 833                close(data->fd[1]);
 834                finish_connect(data->conn);
 835        }
 836
 837        free(data);
 838        return 0;
 839}
 840
 841void transport_take_over(struct transport *transport,
 842                         struct child_process *child)
 843{
 844        struct git_transport_data *data;
 845
 846        if (!transport->smart_options)
 847                die("Bug detected: Taking over transport requires non-NULL "
 848                    "smart_options field.");
 849
 850        data = xcalloc(1, sizeof(*data));
 851        data->options = *transport->smart_options;
 852        data->conn = child;
 853        data->fd[0] = data->conn->out;
 854        data->fd[1] = data->conn->in;
 855        data->got_remote_heads = 0;
 856        transport->data = data;
 857
 858        transport->set_option = NULL;
 859        transport->get_refs_list = get_refs_via_connect;
 860        transport->fetch = fetch_refs_via_pack;
 861        transport->push = NULL;
 862        transport->push_refs = git_transport_push;
 863        transport->disconnect = disconnect_git;
 864        transport->smart_options = &(data->options);
 865}
 866
 867static int is_local(const char *url)
 868{
 869        const char *colon = strchr(url, ':');
 870        const char *slash = strchr(url, '/');
 871        return !colon || (slash && slash < colon) ||
 872                has_dos_drive_prefix(url);
 873}
 874
 875static int is_file(const char *url)
 876{
 877        struct stat buf;
 878        if (stat(url, &buf))
 879                return 0;
 880        return S_ISREG(buf.st_mode);
 881}
 882
 883static int external_specification_len(const char *url)
 884{
 885        return strchr(url, ':') - url;
 886}
 887
 888struct transport *transport_get(struct remote *remote, const char *url)
 889{
 890        const char *helper;
 891        struct transport *ret = xcalloc(1, sizeof(*ret));
 892
 893        ret->progress = isatty(2);
 894
 895        if (!remote)
 896                die("No remote provided to transport_get()");
 897
 898        ret->got_remote_refs = 0;
 899        ret->remote = remote;
 900        helper = remote->foreign_vcs;
 901
 902        if (!url && remote->url)
 903                url = remote->url[0];
 904        ret->url = url;
 905
 906        /* maybe it is a foreign URL? */
 907        if (url) {
 908                const char *p = url;
 909
 910                while (is_urlschemechar(p == url, *p))
 911                        p++;
 912                if (!prefixcmp(p, "::"))
 913                        helper = xstrndup(url, p - url);
 914        }
 915
 916        if (helper) {
 917                transport_helper_init(ret, helper);
 918        } else if (!prefixcmp(url, "rsync:")) {
 919                ret->get_refs_list = get_refs_via_rsync;
 920                ret->fetch = fetch_objs_via_rsync;
 921                ret->push = rsync_transport_push;
 922                ret->smart_options = NULL;
 923        } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
 924                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 925                ret->data = data;
 926                ret->get_refs_list = get_refs_from_bundle;
 927                ret->fetch = fetch_refs_from_bundle;
 928                ret->disconnect = close_bundle;
 929                ret->smart_options = NULL;
 930        } else if (!is_url(url)
 931                || !prefixcmp(url, "file://")
 932                || !prefixcmp(url, "git://")
 933                || !prefixcmp(url, "ssh://")
 934                || !prefixcmp(url, "git+ssh://")
 935                || !prefixcmp(url, "ssh+git://")) {
 936                /* These are builtin smart transports. */
 937                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 938                ret->data = data;
 939                ret->set_option = NULL;
 940                ret->get_refs_list = get_refs_via_connect;
 941                ret->fetch = fetch_refs_via_pack;
 942                ret->push_refs = git_transport_push;
 943                ret->connect = connect_git;
 944                ret->disconnect = disconnect_git;
 945                ret->smart_options = &(data->options);
 946
 947                data->conn = NULL;
 948                data->got_remote_heads = 0;
 949        } else {
 950                /* Unknown protocol in URL. Pass to external handler. */
 951                int len = external_specification_len(url);
 952                char *handler = xmalloc(len + 1);
 953                handler[len] = 0;
 954                strncpy(handler, url, len);
 955                transport_helper_init(ret, handler);
 956        }
 957
 958        if (ret->smart_options) {
 959                ret->smart_options->thin = 1;
 960                ret->smart_options->uploadpack = "git-upload-pack";
 961                if (remote->uploadpack)
 962                        ret->smart_options->uploadpack = remote->uploadpack;
 963                ret->smart_options->receivepack = "git-receive-pack";
 964                if (remote->receivepack)
 965                        ret->smart_options->receivepack = remote->receivepack;
 966        }
 967
 968        return ret;
 969}
 970
 971int transport_set_option(struct transport *transport,
 972                         const char *name, const char *value)
 973{
 974        int git_reports = 1, protocol_reports = 1;
 975
 976        if (transport->smart_options)
 977                git_reports = set_git_option(transport->smart_options,
 978                                             name, value);
 979
 980        if (transport->set_option)
 981                protocol_reports = transport->set_option(transport, name,
 982                                                        value);
 983
 984        /* If either report is 0, report 0 (success). */
 985        if (!git_reports || !protocol_reports)
 986                return 0;
 987        /* If either reports -1 (invalid value), report -1. */
 988        if ((git_reports == -1) || (protocol_reports == -1))
 989                return -1;
 990        /* Otherwise if both report unknown, report unknown. */
 991        return 1;
 992}
 993
 994void transport_set_verbosity(struct transport *transport, int verbosity,
 995        int force_progress)
 996{
 997        if (verbosity >= 1)
 998                transport->verbose = verbosity <= 3 ? verbosity : 3;
 999        if (verbosity < 0)
1000                transport->verbose = -1;
1001
1002        /**
1003         * Rules used to determine whether to report progress (processing aborts
1004         * when a rule is satisfied):
1005         *
1006         *   . Report progress, if force_progress is 1 (ie. --progress).
1007         *   . Don't report progress, if force_progress is 0 (ie. --no-progress).
1008         *   . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1009         *   . Report progress if isatty(2) is 1.
1010         **/
1011        if (force_progress >= 0)
1012                transport->progress = !!force_progress;
1013        else
1014                transport->progress = verbosity >= 0 && isatty(2);
1015}
1016
1017static void die_with_unpushed_submodules(struct string_list *needs_pushing)
1018{
1019        int i;
1020
1021        fprintf(stderr, "The following submodule paths contain changes that can\n"
1022                        "not be found on any remote:\n");
1023        for (i = 0; i < needs_pushing->nr; i++)
1024                printf("  %s\n", needs_pushing->items[i].string);
1025        fprintf(stderr, "\nPlease try\n\n"
1026                        "       git push --recurse-submodules=on-demand\n\n"
1027                        "or cd to the path and use\n\n"
1028                        "       git push\n\n"
1029                        "to push them to a remote.\n\n");
1030
1031        string_list_clear(needs_pushing, 0);
1032
1033        die("Aborting.");
1034}
1035
1036int transport_push(struct transport *transport,
1037                   int refspec_nr, const char **refspec, int flags,
1038                   int *nonfastforward)
1039{
1040        *nonfastforward = 0;
1041        transport_verify_remote_names(refspec_nr, refspec);
1042
1043        if (transport->push) {
1044                /* Maybe FIXME. But no important transport uses this case. */
1045                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1046                        die("This transport does not support using --set-upstream");
1047
1048                return transport->push(transport, refspec_nr, refspec, flags);
1049        } else if (transport->push_refs) {
1050                struct ref *remote_refs =
1051                        transport->get_refs_list(transport, 1);
1052                struct ref *local_refs = get_local_heads();
1053                int match_flags = MATCH_REFS_NONE;
1054                int verbose = (transport->verbose > 0);
1055                int quiet = (transport->verbose < 0);
1056                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1057                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1058                int push_ret, ret, err;
1059
1060                if (flags & TRANSPORT_PUSH_ALL)
1061                        match_flags |= MATCH_REFS_ALL;
1062                if (flags & TRANSPORT_PUSH_MIRROR)
1063                        match_flags |= MATCH_REFS_MIRROR;
1064                if (flags & TRANSPORT_PUSH_PRUNE)
1065                        match_flags |= MATCH_REFS_PRUNE;
1066
1067                if (match_push_refs(local_refs, &remote_refs,
1068                                    refspec_nr, refspec, match_flags)) {
1069                        return -1;
1070                }
1071
1072                set_ref_status_for_push(remote_refs,
1073                        flags & TRANSPORT_PUSH_MIRROR,
1074                        flags & TRANSPORT_PUSH_FORCE);
1075
1076                if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
1077                        struct ref *ref = remote_refs;
1078                        for (; ref; ref = ref->next)
1079                                if (!is_null_sha1(ref->new_sha1) &&
1080                                    !push_unpushed_submodules(ref->new_sha1,
1081                                            transport->remote->name))
1082                                    die ("Failed to push all needed submodules!");
1083                }
1084
1085                if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
1086                              TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
1087                        struct ref *ref = remote_refs;
1088                        struct string_list needs_pushing;
1089
1090                        memset(&needs_pushing, 0, sizeof(struct string_list));
1091                        needs_pushing.strdup_strings = 1;
1092                        for (; ref; ref = ref->next)
1093                                if (!is_null_sha1(ref->new_sha1) &&
1094                                    find_unpushed_submodules(ref->new_sha1,
1095                                            transport->remote->name, &needs_pushing))
1096                                        die_with_unpushed_submodules(&needs_pushing);
1097                }
1098
1099                push_ret = transport->push_refs(transport, remote_refs, flags);
1100                err = push_had_errors(remote_refs);
1101                ret = push_ret | err;
1102
1103                if (!quiet || err)
1104                        transport_print_push_status(transport->url, remote_refs,
1105                                        verbose | porcelain, porcelain,
1106                                        nonfastforward);
1107
1108                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1109                        set_upstreams(transport, remote_refs, pretend);
1110
1111                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1112                        struct ref *ref;
1113                        for (ref = remote_refs; ref; ref = ref->next)
1114                                transport_update_tracking_ref(transport->remote, ref, verbose);
1115                }
1116
1117                if (porcelain && !push_ret)
1118                        puts("Done");
1119                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1120                        fprintf(stderr, "Everything up-to-date\n");
1121
1122                return ret;
1123        }
1124        return 1;
1125}
1126
1127const struct ref *transport_get_remote_refs(struct transport *transport)
1128{
1129        if (!transport->got_remote_refs) {
1130                transport->remote_refs = transport->get_refs_list(transport, 0);
1131                transport->got_remote_refs = 1;
1132        }
1133
1134        return transport->remote_refs;
1135}
1136
1137int transport_fetch_refs(struct transport *transport, struct ref *refs)
1138{
1139        int rc;
1140        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1141        struct ref **heads = NULL;
1142        struct ref *rm;
1143
1144        for (rm = refs; rm; rm = rm->next) {
1145                nr_refs++;
1146                if (rm->peer_ref &&
1147                    !is_null_sha1(rm->old_sha1) &&
1148                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1149                        continue;
1150                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1151                heads[nr_heads++] = rm;
1152        }
1153
1154        if (!nr_heads) {
1155                /*
1156                 * When deepening of a shallow repository is requested,
1157                 * then local and remote refs are likely to still be equal.
1158                 * Just feed them all to the fetch method in that case.
1159                 * This condition shouldn't be met in a non-deepening fetch
1160                 * (see builtin-fetch.c:quickfetch()).
1161                 */
1162                heads = xmalloc(nr_refs * sizeof(*heads));
1163                for (rm = refs; rm; rm = rm->next)
1164                        heads[nr_heads++] = rm;
1165        }
1166
1167        rc = transport->fetch(transport, nr_heads, heads);
1168
1169        free(heads);
1170        return rc;
1171}
1172
1173void transport_unlock_pack(struct transport *transport)
1174{
1175        if (transport->pack_lockfile) {
1176                unlink_or_warn(transport->pack_lockfile);
1177                free(transport->pack_lockfile);
1178                transport->pack_lockfile = NULL;
1179        }
1180}
1181
1182int transport_connect(struct transport *transport, const char *name,
1183                      const char *exec, int fd[2])
1184{
1185        if (transport->connect)
1186                return transport->connect(transport, name, exec, fd);
1187        else
1188                die("Operation not supported by protocol");
1189}
1190
1191int transport_disconnect(struct transport *transport)
1192{
1193        int ret = 0;
1194        if (transport->disconnect)
1195                ret = transport->disconnect(transport);
1196        free(transport);
1197        return ret;
1198}
1199
1200/*
1201 * Strip username (and password) from a URL and return
1202 * it in a newly allocated string.
1203 */
1204char *transport_anonymize_url(const char *url)
1205{
1206        char *anon_url, *scheme_prefix, *anon_part;
1207        size_t anon_len, prefix_len = 0;
1208
1209        anon_part = strchr(url, '@');
1210        if (is_local(url) || !anon_part)
1211                goto literal_copy;
1212
1213        anon_len = strlen(++anon_part);
1214        scheme_prefix = strstr(url, "://");
1215        if (!scheme_prefix) {
1216                if (!strchr(anon_part, ':'))
1217                        /* cannot be "me@there:/path/name" */
1218                        goto literal_copy;
1219        } else {
1220                const char *cp;
1221                /* make sure scheme is reasonable */
1222                for (cp = url; cp < scheme_prefix; cp++) {
1223                        switch (*cp) {
1224                                /* RFC 1738 2.1 */
1225                        case '+': case '.': case '-':
1226                                break; /* ok */
1227                        default:
1228                                if (isalnum(*cp))
1229                                        break;
1230                                /* it isn't */
1231                                goto literal_copy;
1232                        }
1233                }
1234                /* @ past the first slash does not count */
1235                cp = strchr(scheme_prefix + 3, '/');
1236                if (cp && cp < anon_part)
1237                        goto literal_copy;
1238                prefix_len = scheme_prefix - url + 3;
1239        }
1240        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1241        memcpy(anon_url, url, prefix_len);
1242        memcpy(anon_url + prefix_len, anon_part, anon_len);
1243        return anon_url;
1244literal_copy:
1245        return xstrdup(url);
1246}
1247
1248struct alternate_refs_data {
1249        alternate_ref_fn *fn;
1250        void *data;
1251};
1252
1253static int refs_from_alternate_cb(struct alternate_object_database *e,
1254                                  void *data)
1255{
1256        char *other;
1257        size_t len;
1258        struct remote *remote;
1259        struct transport *transport;
1260        const struct ref *extra;
1261        struct alternate_refs_data *cb = data;
1262
1263        e->name[-1] = '\0';
1264        other = xstrdup(real_path(e->base));
1265        e->name[-1] = '/';
1266        len = strlen(other);
1267
1268        while (other[len-1] == '/')
1269                other[--len] = '\0';
1270        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1271                return 0;
1272        /* Is this a git repository with refs? */
1273        memcpy(other + len - 8, "/refs", 6);
1274        if (!is_directory(other))
1275                return 0;
1276        other[len - 8] = '\0';
1277        remote = remote_get(other);
1278        transport = transport_get(remote, other);
1279        for (extra = transport_get_remote_refs(transport);
1280             extra;
1281             extra = extra->next)
1282                cb->fn(extra, cb->data);
1283        transport_disconnect(transport);
1284        free(other);
1285        return 0;
1286}
1287
1288void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1289{
1290        struct alternate_refs_data cb;
1291        cb.fn = fn;
1292        cb.data = data;
1293        foreach_alt_odb(refs_from_alternate_cb, &cb);
1294}