Andrew's git / gitweb.git / transport.c
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transport.con commit git-p4: add tests demonstrating spec overlay ambiguities (42d8c27)
   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
  15/* rsync support */
  16
  17/*
  18 * We copy packed-refs and refs/ into a temporary file, then read the
  19 * loose refs recursively (sorting whenever possible), and then inserting
  20 * those packed refs that are not yet in the list (not validating, but
  21 * assuming that the file is sorted).
  22 *
  23 * Appears refactoring this from refs.c is too cumbersome.
  24 */
  25
  26static int str_cmp(const void *a, const void *b)
  27{
  28        const char *s1 = a;
  29        const char *s2 = b;
  30
  31        return strcmp(s1, s2);
  32}
  33
  34/* path->buf + name_offset is expected to point to "refs/" */
  35
  36static int read_loose_refs(struct strbuf *path, int name_offset,
  37                struct ref **tail)
  38{
  39        DIR *dir = opendir(path->buf);
  40        struct dirent *de;
  41        struct {
  42                char **entries;
  43                int nr, alloc;
  44        } list;
  45        int i, pathlen;
  46
  47        if (!dir)
  48                return -1;
  49
  50        memset (&list, 0, sizeof(list));
  51
  52        while ((de = readdir(dir))) {
  53                if (is_dot_or_dotdot(de->d_name))
  54                        continue;
  55                ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  56                list.entries[list.nr++] = xstrdup(de->d_name);
  57        }
  58        closedir(dir);
  59
  60        /* sort the list */
  61
  62        qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  63
  64        pathlen = path->len;
  65        strbuf_addch(path, '/');
  66
  67        for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  68                strbuf_addstr(path, list.entries[i]);
  69                if (read_loose_refs(path, name_offset, tail)) {
  70                        int fd = open(path->buf, O_RDONLY);
  71                        char buffer[40];
  72                        struct ref *next;
  73
  74                        if (fd < 0)
  75                                continue;
  76                        next = alloc_ref(path->buf + name_offset);
  77                        if (read_in_full(fd, buffer, 40) != 40 ||
  78                                        get_sha1_hex(buffer, next->old_sha1)) {
  79                                close(fd);
  80                                free(next);
  81                                continue;
  82                        }
  83                        close(fd);
  84                        (*tail)->next = next;
  85                        *tail = next;
  86                }
  87        }
  88        strbuf_setlen(path, pathlen);
  89
  90        for (i = 0; i < list.nr; i++)
  91                free(list.entries[i]);
  92        free(list.entries);
  93
  94        return 0;
  95}
  96
  97/* insert the packed refs for which no loose refs were found */
  98
  99static void insert_packed_refs(const char *packed_refs, struct ref **list)
 100{
 101        FILE *f = fopen(packed_refs, "r");
 102        static char buffer[PATH_MAX];
 103
 104        if (!f)
 105                return;
 106
 107        for (;;) {
 108                int cmp = cmp, len;
 109
 110                if (!fgets(buffer, sizeof(buffer), f)) {
 111                        fclose(f);
 112                        return;
 113                }
 114
 115                if (hexval(buffer[0]) > 0xf)
 116                        continue;
 117                len = strlen(buffer);
 118                if (len && buffer[len - 1] == '\n')
 119                        buffer[--len] = '\0';
 120                if (len < 41)
 121                        continue;
 122                while ((*list)->next &&
 123                                (cmp = strcmp(buffer + 41,
 124                                      (*list)->next->name)) > 0)
 125                        list = &(*list)->next;
 126                if (!(*list)->next || cmp < 0) {
 127                        struct ref *next = alloc_ref(buffer + 41);
 128                        buffer[40] = '\0';
 129                        if (get_sha1_hex(buffer, next->old_sha1)) {
 130                                warning ("invalid SHA-1: %s", buffer);
 131                                free(next);
 132                                continue;
 133                        }
 134                        next->next = (*list)->next;
 135                        (*list)->next = next;
 136                        list = &(*list)->next;
 137                }
 138        }
 139}
 140
 141static void set_upstreams(struct transport *transport, struct ref *refs,
 142        int pretend)
 143{
 144        struct ref *ref;
 145        for (ref = refs; ref; ref = ref->next) {
 146                const char *localname;
 147                const char *tmp;
 148                const char *remotename;
 149                unsigned char sha[20];
 150                int flag = 0;
 151                /*
 152                 * Check suitability for tracking. Must be successful /
 153                 * already up-to-date ref create/modify (not delete).
 154                 */
 155                if (ref->status != REF_STATUS_OK &&
 156                        ref->status != REF_STATUS_UPTODATE)
 157                        continue;
 158                if (!ref->peer_ref)
 159                        continue;
 160                if (is_null_sha1(ref->new_sha1))
 161                        continue;
 162
 163                /* Follow symbolic refs (mainly for HEAD). */
 164                localname = ref->peer_ref->name;
 165                remotename = ref->name;
 166                tmp = resolve_ref_unsafe(localname, sha, 1, &flag);
 167                if (tmp && flag & REF_ISSYMREF &&
 168                        !prefixcmp(tmp, "refs/heads/"))
 169                        localname = tmp;
 170
 171                /* Both source and destination must be local branches. */
 172                if (!localname || prefixcmp(localname, "refs/heads/"))
 173                        continue;
 174                if (!remotename || prefixcmp(remotename, "refs/heads/"))
 175                        continue;
 176
 177                if (!pretend)
 178                        install_branch_config(BRANCH_CONFIG_VERBOSE,
 179                                localname + 11, transport->remote->name,
 180                                remotename);
 181                else
 182                        printf("Would set upstream of '%s' to '%s' of '%s'\n",
 183                                localname + 11, remotename + 11,
 184                                transport->remote->name);
 185        }
 186}
 187
 188static const char *rsync_url(const char *url)
 189{
 190        return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 191}
 192
 193static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 194{
 195        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 196        struct ref dummy = {NULL}, *tail = &dummy;
 197        struct child_process rsync;
 198        const char *args[5];
 199        int temp_dir_len;
 200
 201        if (for_push)
 202                return NULL;
 203
 204        /* copy the refs to the temporary directory */
 205
 206        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 207        if (!mkdtemp(temp_dir.buf))
 208                die_errno ("Could not make temporary directory");
 209        temp_dir_len = temp_dir.len;
 210
 211        strbuf_addstr(&buf, rsync_url(transport->url));
 212        strbuf_addstr(&buf, "/refs");
 213
 214        memset(&rsync, 0, sizeof(rsync));
 215        rsync.argv = args;
 216        rsync.stdout_to_stderr = 1;
 217        args[0] = "rsync";
 218        args[1] = (transport->verbose > 1) ? "-rv" : "-r";
 219        args[2] = buf.buf;
 220        args[3] = temp_dir.buf;
 221        args[4] = NULL;
 222
 223        if (run_command(&rsync))
 224                die ("Could not run rsync to get refs");
 225
 226        strbuf_reset(&buf);
 227        strbuf_addstr(&buf, rsync_url(transport->url));
 228        strbuf_addstr(&buf, "/packed-refs");
 229
 230        args[2] = buf.buf;
 231
 232        if (run_command(&rsync))
 233                die ("Could not run rsync to get refs");
 234
 235        /* read the copied refs */
 236
 237        strbuf_addstr(&temp_dir, "/refs");
 238        read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 239        strbuf_setlen(&temp_dir, temp_dir_len);
 240
 241        tail = &dummy;
 242        strbuf_addstr(&temp_dir, "/packed-refs");
 243        insert_packed_refs(temp_dir.buf, &tail);
 244        strbuf_setlen(&temp_dir, temp_dir_len);
 245
 246        if (remove_dir_recursively(&temp_dir, 0))
 247                warning ("Error removing temporary directory %s.",
 248                                temp_dir.buf);
 249
 250        strbuf_release(&buf);
 251        strbuf_release(&temp_dir);
 252
 253        return dummy.next;
 254}
 255
 256static int fetch_objs_via_rsync(struct transport *transport,
 257                                int nr_objs, struct ref **to_fetch)
 258{
 259        struct strbuf buf = STRBUF_INIT;
 260        struct child_process rsync;
 261        const char *args[8];
 262        int result;
 263
 264        strbuf_addstr(&buf, rsync_url(transport->url));
 265        strbuf_addstr(&buf, "/objects/");
 266
 267        memset(&rsync, 0, sizeof(rsync));
 268        rsync.argv = args;
 269        rsync.stdout_to_stderr = 1;
 270        args[0] = "rsync";
 271        args[1] = (transport->verbose > 1) ? "-rv" : "-r";
 272        args[2] = "--ignore-existing";
 273        args[3] = "--exclude";
 274        args[4] = "info";
 275        args[5] = buf.buf;
 276        args[6] = get_object_directory();
 277        args[7] = NULL;
 278
 279        /* NEEDSWORK: handle one level of alternates */
 280        result = run_command(&rsync);
 281
 282        strbuf_release(&buf);
 283
 284        return result;
 285}
 286
 287static int write_one_ref(const char *name, const unsigned char *sha1,
 288                int flags, void *data)
 289{
 290        struct strbuf *buf = data;
 291        int len = buf->len;
 292        FILE *f;
 293
 294        /* when called via for_each_ref(), flags is non-zero */
 295        if (flags && prefixcmp(name, "refs/heads/") &&
 296                        prefixcmp(name, "refs/tags/"))
 297                return 0;
 298
 299        strbuf_addstr(buf, name);
 300        if (safe_create_leading_directories(buf->buf) ||
 301                        !(f = fopen(buf->buf, "w")) ||
 302                        fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 303                        fclose(f))
 304                return error("problems writing temporary file %s", buf->buf);
 305        strbuf_setlen(buf, len);
 306        return 0;
 307}
 308
 309static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 310                int refspec_nr, const char **refspec)
 311{
 312        int i;
 313
 314        for (i = 0; i < refspec_nr; i++) {
 315                unsigned char sha1[20];
 316                char *ref;
 317
 318                if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 319                        return error("Could not get ref %s", refspec[i]);
 320
 321                if (write_one_ref(ref, sha1, 0, temp_dir)) {
 322                        free(ref);
 323                        return -1;
 324                }
 325                free(ref);
 326        }
 327        return 0;
 328}
 329
 330static int rsync_transport_push(struct transport *transport,
 331                int refspec_nr, const char **refspec, int flags)
 332{
 333        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 334        int result = 0, i;
 335        struct child_process rsync;
 336        const char *args[10];
 337
 338        if (flags & TRANSPORT_PUSH_MIRROR)
 339                return error("rsync transport does not support mirror mode");
 340
 341        /* first push the objects */
 342
 343        strbuf_addstr(&buf, rsync_url(transport->url));
 344        strbuf_addch(&buf, '/');
 345
 346        memset(&rsync, 0, sizeof(rsync));
 347        rsync.argv = args;
 348        rsync.stdout_to_stderr = 1;
 349        i = 0;
 350        args[i++] = "rsync";
 351        args[i++] = "-a";
 352        if (flags & TRANSPORT_PUSH_DRY_RUN)
 353                args[i++] = "--dry-run";
 354        if (transport->verbose > 1)
 355                args[i++] = "-v";
 356        args[i++] = "--ignore-existing";
 357        args[i++] = "--exclude";
 358        args[i++] = "info";
 359        args[i++] = get_object_directory();
 360        args[i++] = buf.buf;
 361        args[i++] = NULL;
 362
 363        if (run_command(&rsync))
 364                return error("Could not push objects to %s",
 365                                rsync_url(transport->url));
 366
 367        /* copy the refs to the temporary directory; they could be packed. */
 368
 369        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 370        if (!mkdtemp(temp_dir.buf))
 371                die_errno ("Could not make temporary directory");
 372        strbuf_addch(&temp_dir, '/');
 373
 374        if (flags & TRANSPORT_PUSH_ALL) {
 375                if (for_each_ref(write_one_ref, &temp_dir))
 376                        return -1;
 377        } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 378                return -1;
 379
 380        i = 2;
 381        if (flags & TRANSPORT_PUSH_DRY_RUN)
 382                args[i++] = "--dry-run";
 383        if (!(flags & TRANSPORT_PUSH_FORCE))
 384                args[i++] = "--ignore-existing";
 385        args[i++] = temp_dir.buf;
 386        args[i++] = rsync_url(transport->url);
 387        args[i++] = NULL;
 388        if (run_command(&rsync))
 389                result = error("Could not push to %s",
 390                                rsync_url(transport->url));
 391
 392        if (remove_dir_recursively(&temp_dir, 0))
 393                warning ("Could not remove temporary directory %s.",
 394                                temp_dir.buf);
 395
 396        strbuf_release(&buf);
 397        strbuf_release(&temp_dir);
 398
 399        return result;
 400}
 401
 402struct bundle_transport_data {
 403        int fd;
 404        struct bundle_header header;
 405};
 406
 407static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 408{
 409        struct bundle_transport_data *data = transport->data;
 410        struct ref *result = NULL;
 411        int i;
 412
 413        if (for_push)
 414                return NULL;
 415
 416        if (data->fd > 0)
 417                close(data->fd);
 418        data->fd = read_bundle_header(transport->url, &data->header);
 419        if (data->fd < 0)
 420                die ("Could not read bundle '%s'.", transport->url);
 421        for (i = 0; i < data->header.references.nr; i++) {
 422                struct ref_list_entry *e = data->header.references.list + i;
 423                struct ref *ref = alloc_ref(e->name);
 424                hashcpy(ref->old_sha1, e->sha1);
 425                ref->next = result;
 426                result = ref;
 427        }
 428        return result;
 429}
 430
 431static int fetch_refs_from_bundle(struct transport *transport,
 432                               int nr_heads, struct ref **to_fetch)
 433{
 434        struct bundle_transport_data *data = transport->data;
 435        return unbundle(&data->header, data->fd,
 436                        transport->progress ? BUNDLE_VERBOSE : 0);
 437}
 438
 439static int close_bundle(struct transport *transport)
 440{
 441        struct bundle_transport_data *data = transport->data;
 442        if (data->fd > 0)
 443                close(data->fd);
 444        free(data);
 445        return 0;
 446}
 447
 448struct git_transport_data {
 449        struct git_transport_options options;
 450        struct child_process *conn;
 451        int fd[2];
 452        unsigned got_remote_heads : 1;
 453        struct extra_have_objects extra_have;
 454};
 455
 456static int set_git_option(struct git_transport_options *opts,
 457                          const char *name, const char *value)
 458{
 459        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 460                opts->uploadpack = value;
 461                return 0;
 462        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 463                opts->receivepack = value;
 464                return 0;
 465        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 466                opts->thin = !!value;
 467                return 0;
 468        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 469                opts->followtags = !!value;
 470                return 0;
 471        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 472                opts->keep = !!value;
 473                return 0;
 474        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 475                if (!value)
 476                        opts->depth = 0;
 477                else
 478                        opts->depth = atoi(value);
 479                return 0;
 480        }
 481        return 1;
 482}
 483
 484static int connect_setup(struct transport *transport, int for_push, int verbose)
 485{
 486        struct git_transport_data *data = transport->data;
 487
 488        if (data->conn)
 489                return 0;
 490
 491        data->conn = git_connect(data->fd, transport->url,
 492                                 for_push ? data->options.receivepack :
 493                                 data->options.uploadpack,
 494                                 verbose ? CONNECT_VERBOSE : 0);
 495
 496        return 0;
 497}
 498
 499static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 500{
 501        struct git_transport_data *data = transport->data;
 502        struct ref *refs;
 503
 504        connect_setup(transport, for_push, 0);
 505        get_remote_heads(data->fd[0], &refs,
 506                         for_push ? REF_NORMAL : 0, &data->extra_have);
 507        data->got_remote_heads = 1;
 508
 509        return refs;
 510}
 511
 512static int fetch_refs_via_pack(struct transport *transport,
 513                               int nr_heads, struct ref **to_fetch)
 514{
 515        struct git_transport_data *data = transport->data;
 516        char **heads = xmalloc(nr_heads * sizeof(*heads));
 517        char **origh = xmalloc(nr_heads * sizeof(*origh));
 518        const struct ref *refs;
 519        char *dest = xstrdup(transport->url);
 520        struct fetch_pack_args args;
 521        int i;
 522        struct ref *refs_tmp = NULL;
 523
 524        memset(&args, 0, sizeof(args));
 525        args.uploadpack = data->options.uploadpack;
 526        args.keep_pack = data->options.keep;
 527        args.lock_pack = 1;
 528        args.use_thin_pack = data->options.thin;
 529        args.include_tag = data->options.followtags;
 530        args.verbose = (transport->verbose > 1);
 531        args.quiet = (transport->verbose < 0);
 532        args.no_progress = !transport->progress;
 533        args.depth = data->options.depth;
 534
 535        for (i = 0; i < nr_heads; i++)
 536                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 537
 538        if (!data->got_remote_heads) {
 539                connect_setup(transport, 0, 0);
 540                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL);
 541                data->got_remote_heads = 1;
 542        }
 543
 544        refs = fetch_pack(&args, data->fd, data->conn,
 545                          refs_tmp ? refs_tmp : transport->remote_refs,
 546                          dest, nr_heads, heads, &transport->pack_lockfile);
 547        close(data->fd[0]);
 548        close(data->fd[1]);
 549        if (finish_connect(data->conn))
 550                refs = NULL;
 551        data->conn = NULL;
 552        data->got_remote_heads = 0;
 553
 554        free_refs(refs_tmp);
 555
 556        for (i = 0; i < nr_heads; i++)
 557                free(origh[i]);
 558        free(origh);
 559        free(heads);
 560        free(dest);
 561        return (refs ? 0 : -1);
 562}
 563
 564static int push_had_errors(struct ref *ref)
 565{
 566        for (; ref; ref = ref->next) {
 567                switch (ref->status) {
 568                case REF_STATUS_NONE:
 569                case REF_STATUS_UPTODATE:
 570                case REF_STATUS_OK:
 571                        break;
 572                default:
 573                        return 1;
 574                }
 575        }
 576        return 0;
 577}
 578
 579int transport_refs_pushed(struct ref *ref)
 580{
 581        for (; ref; ref = ref->next) {
 582                switch(ref->status) {
 583                case REF_STATUS_NONE:
 584                case REF_STATUS_UPTODATE:
 585                        break;
 586                default:
 587                        return 1;
 588                }
 589        }
 590        return 0;
 591}
 592
 593void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 594{
 595        struct refspec rs;
 596
 597        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 598                return;
 599
 600        rs.src = ref->name;
 601        rs.dst = NULL;
 602
 603        if (!remote_find_tracking(remote, &rs)) {
 604                if (verbose)
 605                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 606                if (ref->deletion) {
 607                        delete_ref(rs.dst, NULL, 0);
 608                } else
 609                        update_ref("update by push", rs.dst,
 610                                        ref->new_sha1, NULL, 0, 0);
 611                free(rs.dst);
 612        }
 613}
 614
 615static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 616{
 617        if (porcelain) {
 618                if (from)
 619                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 620                else
 621                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 622                if (msg)
 623                        fprintf(stdout, "%s (%s)\n", summary, msg);
 624                else
 625                        fprintf(stdout, "%s\n", summary);
 626        } else {
 627                fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 628                if (from)
 629                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 630                else
 631                        fputs(prettify_refname(to->name), stderr);
 632                if (msg) {
 633                        fputs(" (", stderr);
 634                        fputs(msg, stderr);
 635                        fputc(')', stderr);
 636                }
 637                fputc('\n', stderr);
 638        }
 639}
 640
 641static const char *status_abbrev(unsigned char sha1[20])
 642{
 643        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 644}
 645
 646static void print_ok_ref_status(struct ref *ref, int porcelain)
 647{
 648        if (ref->deletion)
 649                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 650        else if (is_null_sha1(ref->old_sha1))
 651                print_ref_status('*',
 652                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 653                        "[new branch]"),
 654                        ref, ref->peer_ref, NULL, porcelain);
 655        else {
 656                char quickref[84];
 657                char type;
 658                const char *msg;
 659
 660                strcpy(quickref, status_abbrev(ref->old_sha1));
 661                if (ref->nonfastforward) {
 662                        strcat(quickref, "...");
 663                        type = '+';
 664                        msg = "forced update";
 665                } else {
 666                        strcat(quickref, "..");
 667                        type = ' ';
 668                        msg = NULL;
 669                }
 670                strcat(quickref, status_abbrev(ref->new_sha1));
 671
 672                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 673        }
 674}
 675
 676static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 677{
 678        if (!count)
 679                fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
 680
 681        switch(ref->status) {
 682        case REF_STATUS_NONE:
 683                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 684                break;
 685        case REF_STATUS_REJECT_NODELETE:
 686                print_ref_status('!', "[rejected]", ref, NULL,
 687                                                 "remote does not support deleting refs", porcelain);
 688                break;
 689        case REF_STATUS_UPTODATE:
 690                print_ref_status('=', "[up to date]", ref,
 691                                                 ref->peer_ref, NULL, porcelain);
 692                break;
 693        case REF_STATUS_REJECT_NONFASTFORWARD:
 694                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 695                                                 "non-fast-forward", porcelain);
 696                break;
 697        case REF_STATUS_REMOTE_REJECT:
 698                print_ref_status('!', "[remote rejected]", ref,
 699                                                 ref->deletion ? NULL : ref->peer_ref,
 700                                                 ref->remote_status, porcelain);
 701                break;
 702        case REF_STATUS_EXPECTING_REPORT:
 703                print_ref_status('!', "[remote failure]", ref,
 704                                                 ref->deletion ? NULL : ref->peer_ref,
 705                                                 "remote failed to report status", porcelain);
 706                break;
 707        case REF_STATUS_OK:
 708                print_ok_ref_status(ref, porcelain);
 709                break;
 710        }
 711
 712        return 1;
 713}
 714
 715void transport_print_push_status(const char *dest, struct ref *refs,
 716                                  int verbose, int porcelain, int *nonfastforward)
 717{
 718        struct ref *ref;
 719        int n = 0;
 720
 721        if (verbose) {
 722                for (ref = refs; ref; ref = ref->next)
 723                        if (ref->status == REF_STATUS_UPTODATE)
 724                                n += print_one_push_status(ref, dest, n, porcelain);
 725        }
 726
 727        for (ref = refs; ref; ref = ref->next)
 728                if (ref->status == REF_STATUS_OK)
 729                        n += print_one_push_status(ref, dest, n, porcelain);
 730
 731        *nonfastforward = 0;
 732        for (ref = refs; ref; ref = ref->next) {
 733                if (ref->status != REF_STATUS_NONE &&
 734                    ref->status != REF_STATUS_UPTODATE &&
 735                    ref->status != REF_STATUS_OK)
 736                        n += print_one_push_status(ref, dest, n, porcelain);
 737                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 738                        *nonfastforward = 1;
 739        }
 740}
 741
 742void transport_verify_remote_names(int nr_heads, const char **heads)
 743{
 744        int i;
 745
 746        for (i = 0; i < nr_heads; i++) {
 747                const char *local = heads[i];
 748                const char *remote = strrchr(heads[i], ':');
 749
 750                if (*local == '+')
 751                        local++;
 752
 753                /* A matching refspec is okay.  */
 754                if (remote == local && remote[1] == '\0')
 755                        continue;
 756
 757                remote = remote ? (remote + 1) : local;
 758                if (check_refname_format(remote,
 759                                REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
 760                        die("remote part of refspec is not a valid name in %s",
 761                                heads[i]);
 762        }
 763}
 764
 765static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 766{
 767        struct git_transport_data *data = transport->data;
 768        struct send_pack_args args;
 769        int ret;
 770
 771        if (!data->got_remote_heads) {
 772                struct ref *tmp_refs;
 773                connect_setup(transport, 1, 0);
 774
 775                get_remote_heads(data->fd[0], &tmp_refs, REF_NORMAL, NULL);
 776                data->got_remote_heads = 1;
 777        }
 778
 779        memset(&args, 0, sizeof(args));
 780        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 781        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 782        args.use_thin_pack = data->options.thin;
 783        args.verbose = (transport->verbose > 0);
 784        args.quiet = (transport->verbose < 0);
 785        args.progress = transport->progress;
 786        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 787        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 788
 789        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 790                        &data->extra_have);
 791
 792        close(data->fd[1]);
 793        close(data->fd[0]);
 794        ret |= finish_connect(data->conn);
 795        data->conn = NULL;
 796        data->got_remote_heads = 0;
 797
 798        return ret;
 799}
 800
 801static int connect_git(struct transport *transport, const char *name,
 802                       const char *executable, int fd[2])
 803{
 804        struct git_transport_data *data = transport->data;
 805        data->conn = git_connect(data->fd, transport->url,
 806                                 executable, 0);
 807        fd[0] = data->fd[0];
 808        fd[1] = data->fd[1];
 809        return 0;
 810}
 811
 812static int disconnect_git(struct transport *transport)
 813{
 814        struct git_transport_data *data = transport->data;
 815        if (data->conn) {
 816                if (data->got_remote_heads)
 817                        packet_flush(data->fd[1]);
 818                close(data->fd[0]);
 819                close(data->fd[1]);
 820                finish_connect(data->conn);
 821        }
 822
 823        free(data);
 824        return 0;
 825}
 826
 827void transport_take_over(struct transport *transport,
 828                         struct child_process *child)
 829{
 830        struct git_transport_data *data;
 831
 832        if (!transport->smart_options)
 833                die("Bug detected: Taking over transport requires non-NULL "
 834                    "smart_options field.");
 835
 836        data = xcalloc(1, sizeof(*data));
 837        data->options = *transport->smart_options;
 838        data->conn = child;
 839        data->fd[0] = data->conn->out;
 840        data->fd[1] = data->conn->in;
 841        data->got_remote_heads = 0;
 842        transport->data = data;
 843
 844        transport->set_option = NULL;
 845        transport->get_refs_list = get_refs_via_connect;
 846        transport->fetch = fetch_refs_via_pack;
 847        transport->push = NULL;
 848        transport->push_refs = git_transport_push;
 849        transport->disconnect = disconnect_git;
 850        transport->smart_options = &(data->options);
 851}
 852
 853static int is_local(const char *url)
 854{
 855        const char *colon = strchr(url, ':');
 856        const char *slash = strchr(url, '/');
 857        return !colon || (slash && slash < colon) ||
 858                has_dos_drive_prefix(url);
 859}
 860
 861static int is_file(const char *url)
 862{
 863        struct stat buf;
 864        if (stat(url, &buf))
 865                return 0;
 866        return S_ISREG(buf.st_mode);
 867}
 868
 869static int external_specification_len(const char *url)
 870{
 871        return strchr(url, ':') - url;
 872}
 873
 874struct transport *transport_get(struct remote *remote, const char *url)
 875{
 876        const char *helper;
 877        struct transport *ret = xcalloc(1, sizeof(*ret));
 878
 879        ret->progress = isatty(2);
 880
 881        if (!remote)
 882                die("No remote provided to transport_get()");
 883
 884        ret->got_remote_refs = 0;
 885        ret->remote = remote;
 886        helper = remote->foreign_vcs;
 887
 888        if (!url && remote->url)
 889                url = remote->url[0];
 890        ret->url = url;
 891
 892        /* maybe it is a foreign URL? */
 893        if (url) {
 894                const char *p = url;
 895
 896                while (is_urlschemechar(p == url, *p))
 897                        p++;
 898                if (!prefixcmp(p, "::"))
 899                        helper = xstrndup(url, p - url);
 900        }
 901
 902        if (helper) {
 903                transport_helper_init(ret, helper);
 904        } else if (!prefixcmp(url, "rsync:")) {
 905                ret->get_refs_list = get_refs_via_rsync;
 906                ret->fetch = fetch_objs_via_rsync;
 907                ret->push = rsync_transport_push;
 908                ret->smart_options = NULL;
 909        } else if (is_local(url) && is_file(url) && is_bundle(url, 1)) {
 910                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 911                ret->data = data;
 912                ret->get_refs_list = get_refs_from_bundle;
 913                ret->fetch = fetch_refs_from_bundle;
 914                ret->disconnect = close_bundle;
 915                ret->smart_options = NULL;
 916        } else if (!is_url(url)
 917                || !prefixcmp(url, "file://")
 918                || !prefixcmp(url, "git://")
 919                || !prefixcmp(url, "ssh://")
 920                || !prefixcmp(url, "git+ssh://")
 921                || !prefixcmp(url, "ssh+git://")) {
 922                /* These are builtin smart transports. */
 923                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 924                ret->data = data;
 925                ret->set_option = NULL;
 926                ret->get_refs_list = get_refs_via_connect;
 927                ret->fetch = fetch_refs_via_pack;
 928                ret->push_refs = git_transport_push;
 929                ret->connect = connect_git;
 930                ret->disconnect = disconnect_git;
 931                ret->smart_options = &(data->options);
 932
 933                data->conn = NULL;
 934                data->got_remote_heads = 0;
 935        } else {
 936                /* Unknown protocol in URL. Pass to external handler. */
 937                int len = external_specification_len(url);
 938                char *handler = xmalloc(len + 1);
 939                handler[len] = 0;
 940                strncpy(handler, url, len);
 941                transport_helper_init(ret, handler);
 942        }
 943
 944        if (ret->smart_options) {
 945                ret->smart_options->thin = 1;
 946                ret->smart_options->uploadpack = "git-upload-pack";
 947                if (remote->uploadpack)
 948                        ret->smart_options->uploadpack = remote->uploadpack;
 949                ret->smart_options->receivepack = "git-receive-pack";
 950                if (remote->receivepack)
 951                        ret->smart_options->receivepack = remote->receivepack;
 952        }
 953
 954        return ret;
 955}
 956
 957int transport_set_option(struct transport *transport,
 958                         const char *name, const char *value)
 959{
 960        int git_reports = 1, protocol_reports = 1;
 961
 962        if (transport->smart_options)
 963                git_reports = set_git_option(transport->smart_options,
 964                                             name, value);
 965
 966        if (transport->set_option)
 967                protocol_reports = transport->set_option(transport, name,
 968                                                        value);
 969
 970        /* If either report is 0, report 0 (success). */
 971        if (!git_reports || !protocol_reports)
 972                return 0;
 973        /* If either reports -1 (invalid value), report -1. */
 974        if ((git_reports == -1) || (protocol_reports == -1))
 975                return -1;
 976        /* Otherwise if both report unknown, report unknown. */
 977        return 1;
 978}
 979
 980void transport_set_verbosity(struct transport *transport, int verbosity,
 981        int force_progress)
 982{
 983        if (verbosity >= 1)
 984                transport->verbose = verbosity <= 3 ? verbosity : 3;
 985        if (verbosity < 0)
 986                transport->verbose = -1;
 987
 988        /**
 989         * Rules used to determine whether to report progress (processing aborts
 990         * when a rule is satisfied):
 991         *
 992         *   1. Report progress, if force_progress is 1 (ie. --progress).
 993         *   2. Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
 994         *   3. Report progress if isatty(2) is 1.
 995         **/
 996        transport->progress = force_progress || (verbosity >= 0 && isatty(2));
 997}
 998
 999int transport_push(struct transport *transport,
1000                   int refspec_nr, const char **refspec, int flags,
1001                   int *nonfastforward)
1002{
1003        *nonfastforward = 0;
1004        transport_verify_remote_names(refspec_nr, refspec);
1005
1006        if (transport->push) {
1007                /* Maybe FIXME. But no important transport uses this case. */
1008                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1009                        die("This transport does not support using --set-upstream");
1010
1011                return transport->push(transport, refspec_nr, refspec, flags);
1012        } else if (transport->push_refs) {
1013                struct ref *remote_refs =
1014                        transport->get_refs_list(transport, 1);
1015                struct ref *local_refs = get_local_heads();
1016                int match_flags = MATCH_REFS_NONE;
1017                int verbose = (transport->verbose > 0);
1018                int quiet = (transport->verbose < 0);
1019                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1020                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1021                int push_ret, ret, err;
1022
1023                if (flags & TRANSPORT_PUSH_ALL)
1024                        match_flags |= MATCH_REFS_ALL;
1025                if (flags & TRANSPORT_PUSH_MIRROR)
1026                        match_flags |= MATCH_REFS_MIRROR;
1027
1028                if (match_push_refs(local_refs, &remote_refs,
1029                                    refspec_nr, refspec, match_flags)) {
1030                        return -1;
1031                }
1032
1033                set_ref_status_for_push(remote_refs,
1034                        flags & TRANSPORT_PUSH_MIRROR,
1035                        flags & TRANSPORT_PUSH_FORCE);
1036
1037                if ((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) && !is_bare_repository()) {
1038                        struct ref *ref = remote_refs;
1039                        for (; ref; ref = ref->next)
1040                                if (!is_null_sha1(ref->new_sha1) &&
1041                                    check_submodule_needs_pushing(ref->new_sha1,transport->remote->name))
1042                                        die("There are unpushed submodules, aborting.");
1043                }
1044
1045                push_ret = transport->push_refs(transport, remote_refs, flags);
1046                err = push_had_errors(remote_refs);
1047                ret = push_ret | err;
1048
1049                if (!quiet || err)
1050                        transport_print_push_status(transport->url, remote_refs,
1051                                        verbose | porcelain, porcelain,
1052                                        nonfastforward);
1053
1054                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1055                        set_upstreams(transport, remote_refs, pretend);
1056
1057                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1058                        struct ref *ref;
1059                        for (ref = remote_refs; ref; ref = ref->next)
1060                                transport_update_tracking_ref(transport->remote, ref, verbose);
1061                }
1062
1063                if (porcelain && !push_ret)
1064                        puts("Done");
1065                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1066                        fprintf(stderr, "Everything up-to-date\n");
1067
1068                return ret;
1069        }
1070        return 1;
1071}
1072
1073const struct ref *transport_get_remote_refs(struct transport *transport)
1074{
1075        if (!transport->got_remote_refs) {
1076                transport->remote_refs = transport->get_refs_list(transport, 0);
1077                transport->got_remote_refs = 1;
1078        }
1079
1080        return transport->remote_refs;
1081}
1082
1083int transport_fetch_refs(struct transport *transport, struct ref *refs)
1084{
1085        int rc;
1086        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1087        struct ref **heads = NULL;
1088        struct ref *rm;
1089
1090        for (rm = refs; rm; rm = rm->next) {
1091                nr_refs++;
1092                if (rm->peer_ref &&
1093                    !is_null_sha1(rm->old_sha1) &&
1094                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1095                        continue;
1096                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1097                heads[nr_heads++] = rm;
1098        }
1099
1100        if (!nr_heads) {
1101                /*
1102                 * When deepening of a shallow repository is requested,
1103                 * then local and remote refs are likely to still be equal.
1104                 * Just feed them all to the fetch method in that case.
1105                 * This condition shouldn't be met in a non-deepening fetch
1106                 * (see builtin-fetch.c:quickfetch()).
1107                 */
1108                heads = xmalloc(nr_refs * sizeof(*heads));
1109                for (rm = refs; rm; rm = rm->next)
1110                        heads[nr_heads++] = rm;
1111        }
1112
1113        rc = transport->fetch(transport, nr_heads, heads);
1114
1115        free(heads);
1116        return rc;
1117}
1118
1119void transport_unlock_pack(struct transport *transport)
1120{
1121        if (transport->pack_lockfile) {
1122                unlink_or_warn(transport->pack_lockfile);
1123                free(transport->pack_lockfile);
1124                transport->pack_lockfile = NULL;
1125        }
1126}
1127
1128int transport_connect(struct transport *transport, const char *name,
1129                      const char *exec, int fd[2])
1130{
1131        if (transport->connect)
1132                return transport->connect(transport, name, exec, fd);
1133        else
1134                die("Operation not supported by protocol");
1135}
1136
1137int transport_disconnect(struct transport *transport)
1138{
1139        int ret = 0;
1140        if (transport->disconnect)
1141                ret = transport->disconnect(transport);
1142        free(transport);
1143        return ret;
1144}
1145
1146/*
1147 * Strip username (and password) from an url and return
1148 * it in a newly allocated string.
1149 */
1150char *transport_anonymize_url(const char *url)
1151{
1152        char *anon_url, *scheme_prefix, *anon_part;
1153        size_t anon_len, prefix_len = 0;
1154
1155        anon_part = strchr(url, '@');
1156        if (is_local(url) || !anon_part)
1157                goto literal_copy;
1158
1159        anon_len = strlen(++anon_part);
1160        scheme_prefix = strstr(url, "://");
1161        if (!scheme_prefix) {
1162                if (!strchr(anon_part, ':'))
1163                        /* cannot be "me@there:/path/name" */
1164                        goto literal_copy;
1165        } else {
1166                const char *cp;
1167                /* make sure scheme is reasonable */
1168                for (cp = url; cp < scheme_prefix; cp++) {
1169                        switch (*cp) {
1170                                /* RFC 1738 2.1 */
1171                        case '+': case '.': case '-':
1172                                break; /* ok */
1173                        default:
1174                                if (isalnum(*cp))
1175                                        break;
1176                                /* it isn't */
1177                                goto literal_copy;
1178                        }
1179                }
1180                /* @ past the first slash does not count */
1181                cp = strchr(scheme_prefix + 3, '/');
1182                if (cp && cp < anon_part)
1183                        goto literal_copy;
1184                prefix_len = scheme_prefix - url + 3;
1185        }
1186        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1187        memcpy(anon_url, url, prefix_len);
1188        memcpy(anon_url + prefix_len, anon_part, anon_len);
1189        return anon_url;
1190literal_copy:
1191        return xstrdup(url);
1192}
1193
1194struct alternate_refs_data {
1195        alternate_ref_fn *fn;
1196        void *data;
1197};
1198
1199static int refs_from_alternate_cb(struct alternate_object_database *e,
1200                                  void *data)
1201{
1202        char *other;
1203        size_t len;
1204        struct remote *remote;
1205        struct transport *transport;
1206        const struct ref *extra;
1207        struct alternate_refs_data *cb = data;
1208
1209        e->name[-1] = '\0';
1210        other = xstrdup(real_path(e->base));
1211        e->name[-1] = '/';
1212        len = strlen(other);
1213
1214        while (other[len-1] == '/')
1215                other[--len] = '\0';
1216        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1217                return 0;
1218        /* Is this a git repository with refs? */
1219        memcpy(other + len - 8, "/refs", 6);
1220        if (!is_directory(other))
1221                return 0;
1222        other[len - 8] = '\0';
1223        remote = remote_get(other);
1224        transport = transport_get(remote, other);
1225        for (extra = transport_get_remote_refs(transport);
1226             extra;
1227             extra = extra->next)
1228                cb->fn(extra, cb->data);
1229        transport_disconnect(transport);
1230        free(other);
1231        return 0;
1232}
1233
1234void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1235{
1236        struct alternate_refs_data cb;
1237        cb.fn = fn;
1238        cb.data = data;
1239        foreach_alt_odb(refs_from_alternate_cb, &cb);
1240}