Andrew's git / gitweb.git / transport.c
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transport.con commit pickaxe: give diff_grep the same signature as has_changes (db99cb7)
   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(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 > 0) ? "-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 > 0) ? "-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 > 0)
 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}
 437
 438static int close_bundle(struct transport *transport)
 439{
 440        struct bundle_transport_data *data = transport->data;
 441        if (data->fd > 0)
 442                close(data->fd);
 443        free(data);
 444        return 0;
 445}
 446
 447struct git_transport_data {
 448        struct git_transport_options options;
 449        struct child_process *conn;
 450        int fd[2];
 451        unsigned got_remote_heads : 1;
 452        struct extra_have_objects extra_have;
 453};
 454
 455static int set_git_option(struct git_transport_options *opts,
 456                          const char *name, const char *value)
 457{
 458        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 459                opts->uploadpack = value;
 460                return 0;
 461        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 462                opts->receivepack = value;
 463                return 0;
 464        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 465                opts->thin = !!value;
 466                return 0;
 467        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 468                opts->followtags = !!value;
 469                return 0;
 470        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 471                opts->keep = !!value;
 472                return 0;
 473        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 474                if (!value)
 475                        opts->depth = 0;
 476                else
 477                        opts->depth = atoi(value);
 478                return 0;
 479        }
 480        return 1;
 481}
 482
 483static int connect_setup(struct transport *transport, int for_push, int verbose)
 484{
 485        struct git_transport_data *data = transport->data;
 486
 487        if (data->conn)
 488                return 0;
 489
 490        data->conn = git_connect(data->fd, transport->url,
 491                                 for_push ? data->options.receivepack :
 492                                 data->options.uploadpack,
 493                                 verbose ? CONNECT_VERBOSE : 0);
 494
 495        return 0;
 496}
 497
 498static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 499{
 500        struct git_transport_data *data = transport->data;
 501        struct ref *refs;
 502
 503        connect_setup(transport, for_push, 0);
 504        get_remote_heads(data->fd[0], &refs, 0, NULL,
 505                         for_push ? REF_NORMAL : 0, &data->extra_have);
 506        data->got_remote_heads = 1;
 507
 508        return refs;
 509}
 510
 511static int fetch_refs_via_pack(struct transport *transport,
 512                               int nr_heads, struct ref **to_fetch)
 513{
 514        struct git_transport_data *data = transport->data;
 515        char **heads = xmalloc(nr_heads * sizeof(*heads));
 516        char **origh = xmalloc(nr_heads * sizeof(*origh));
 517        const struct ref *refs;
 518        char *dest = xstrdup(transport->url);
 519        struct fetch_pack_args args;
 520        int i;
 521        struct ref *refs_tmp = NULL;
 522
 523        memset(&args, 0, sizeof(args));
 524        args.uploadpack = data->options.uploadpack;
 525        args.keep_pack = data->options.keep;
 526        args.lock_pack = 1;
 527        args.use_thin_pack = data->options.thin;
 528        args.include_tag = data->options.followtags;
 529        args.verbose = (transport->verbose > 0);
 530        args.quiet = (transport->verbose < 0);
 531        args.no_progress = !transport->progress;
 532        args.depth = data->options.depth;
 533
 534        for (i = 0; i < nr_heads; i++)
 535                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 536
 537        if (!data->got_remote_heads) {
 538                connect_setup(transport, 0, 0);
 539                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 540                data->got_remote_heads = 1;
 541        }
 542
 543        refs = fetch_pack(&args, data->fd, data->conn,
 544                          refs_tmp ? refs_tmp : transport->remote_refs,
 545                          dest, nr_heads, heads, &transport->pack_lockfile);
 546        close(data->fd[0]);
 547        close(data->fd[1]);
 548        if (finish_connect(data->conn))
 549                refs = NULL;
 550        data->conn = NULL;
 551        data->got_remote_heads = 0;
 552
 553        free_refs(refs_tmp);
 554
 555        for (i = 0; i < nr_heads; i++)
 556                free(origh[i]);
 557        free(origh);
 558        free(heads);
 559        free(dest);
 560        return (refs ? 0 : -1);
 561}
 562
 563static int push_had_errors(struct ref *ref)
 564{
 565        for (; ref; ref = ref->next) {
 566                switch (ref->status) {
 567                case REF_STATUS_NONE:
 568                case REF_STATUS_UPTODATE:
 569                case REF_STATUS_OK:
 570                        break;
 571                default:
 572                        return 1;
 573                }
 574        }
 575        return 0;
 576}
 577
 578int transport_refs_pushed(struct ref *ref)
 579{
 580        for (; ref; ref = ref->next) {
 581                switch(ref->status) {
 582                case REF_STATUS_NONE:
 583                case REF_STATUS_UPTODATE:
 584                        break;
 585                default:
 586                        return 1;
 587                }
 588        }
 589        return 0;
 590}
 591
 592void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 593{
 594        struct refspec rs;
 595
 596        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 597                return;
 598
 599        rs.src = ref->name;
 600        rs.dst = NULL;
 601
 602        if (!remote_find_tracking(remote, &rs)) {
 603                if (verbose)
 604                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 605                if (ref->deletion) {
 606                        delete_ref(rs.dst, NULL, 0);
 607                } else
 608                        update_ref("update by push", rs.dst,
 609                                        ref->new_sha1, NULL, 0, 0);
 610                free(rs.dst);
 611        }
 612}
 613
 614static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
 615{
 616        if (porcelain) {
 617                if (from)
 618                        fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
 619                else
 620                        fprintf(stdout, "%c\t:%s\t", flag, to->name);
 621                if (msg)
 622                        fprintf(stdout, "%s (%s)\n", summary, msg);
 623                else
 624                        fprintf(stdout, "%s\n", summary);
 625        } else {
 626                fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
 627                if (from)
 628                        fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
 629                else
 630                        fputs(prettify_refname(to->name), stderr);
 631                if (msg) {
 632                        fputs(" (", stderr);
 633                        fputs(msg, stderr);
 634                        fputc(')', stderr);
 635                }
 636                fputc('\n', stderr);
 637        }
 638}
 639
 640static const char *status_abbrev(unsigned char sha1[20])
 641{
 642        return find_unique_abbrev(sha1, DEFAULT_ABBREV);
 643}
 644
 645static void print_ok_ref_status(struct ref *ref, int porcelain)
 646{
 647        if (ref->deletion)
 648                print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
 649        else if (is_null_sha1(ref->old_sha1))
 650                print_ref_status('*',
 651                        (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
 652                        "[new branch]"),
 653                        ref, ref->peer_ref, NULL, porcelain);
 654        else {
 655                char quickref[84];
 656                char type;
 657                const char *msg;
 658
 659                strcpy(quickref, status_abbrev(ref->old_sha1));
 660                if (ref->nonfastforward) {
 661                        strcat(quickref, "...");
 662                        type = '+';
 663                        msg = "forced update";
 664                } else {
 665                        strcat(quickref, "..");
 666                        type = ' ';
 667                        msg = NULL;
 668                }
 669                strcat(quickref, status_abbrev(ref->new_sha1));
 670
 671                print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
 672        }
 673}
 674
 675static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
 676{
 677        if (!count)
 678                fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
 679
 680        switch(ref->status) {
 681        case REF_STATUS_NONE:
 682                print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
 683                break;
 684        case REF_STATUS_REJECT_NODELETE:
 685                print_ref_status('!', "[rejected]", ref, NULL,
 686                                                 "remote does not support deleting refs", porcelain);
 687                break;
 688        case REF_STATUS_UPTODATE:
 689                print_ref_status('=', "[up to date]", ref,
 690                                                 ref->peer_ref, NULL, porcelain);
 691                break;
 692        case REF_STATUS_REJECT_NONFASTFORWARD:
 693                print_ref_status('!', "[rejected]", ref, ref->peer_ref,
 694                                                 "non-fast-forward", porcelain);
 695                break;
 696        case REF_STATUS_REMOTE_REJECT:
 697                print_ref_status('!', "[remote rejected]", ref,
 698                                                 ref->deletion ? NULL : ref->peer_ref,
 699                                                 ref->remote_status, porcelain);
 700                break;
 701        case REF_STATUS_EXPECTING_REPORT:
 702                print_ref_status('!', "[remote failure]", ref,
 703                                                 ref->deletion ? NULL : ref->peer_ref,
 704                                                 "remote failed to report status", porcelain);
 705                break;
 706        case REF_STATUS_OK:
 707                print_ok_ref_status(ref, porcelain);
 708                break;
 709        }
 710
 711        return 1;
 712}
 713
 714void transport_print_push_status(const char *dest, struct ref *refs,
 715                                  int verbose, int porcelain, int *nonfastforward)
 716{
 717        struct ref *ref;
 718        int n = 0;
 719
 720        if (verbose) {
 721                for (ref = refs; ref; ref = ref->next)
 722                        if (ref->status == REF_STATUS_UPTODATE)
 723                                n += print_one_push_status(ref, dest, n, porcelain);
 724        }
 725
 726        for (ref = refs; ref; ref = ref->next)
 727                if (ref->status == REF_STATUS_OK)
 728                        n += print_one_push_status(ref, dest, n, porcelain);
 729
 730        *nonfastforward = 0;
 731        for (ref = refs; ref; ref = ref->next) {
 732                if (ref->status != REF_STATUS_NONE &&
 733                    ref->status != REF_STATUS_UPTODATE &&
 734                    ref->status != REF_STATUS_OK)
 735                        n += print_one_push_status(ref, dest, n, porcelain);
 736                if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
 737                        *nonfastforward = 1;
 738        }
 739}
 740
 741void transport_verify_remote_names(int nr_heads, const char **heads)
 742{
 743        int i;
 744
 745        for (i = 0; i < nr_heads; i++) {
 746                const char *local = heads[i];
 747                const char *remote = strrchr(heads[i], ':');
 748
 749                if (*local == '+')
 750                        local++;
 751
 752                /* A matching refspec is okay.  */
 753                if (remote == local && remote[1] == '\0')
 754                        continue;
 755
 756                remote = remote ? (remote + 1) : local;
 757                switch (check_ref_format(remote)) {
 758                case 0: /* ok */
 759                case CHECK_REF_FORMAT_ONELEVEL:
 760                        /* ok but a single level -- that is fine for
 761                         * a match pattern.
 762                         */
 763                case CHECK_REF_FORMAT_WILDCARD:
 764                        /* ok but ends with a pattern-match character */
 765                        continue;
 766                }
 767                die("remote part of refspec is not a valid name in %s",
 768                    heads[i]);
 769        }
 770}
 771
 772static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 773{
 774        struct git_transport_data *data = transport->data;
 775        struct send_pack_args args;
 776        int ret;
 777
 778        if (!data->got_remote_heads) {
 779                struct ref *tmp_refs;
 780                connect_setup(transport, 1, 0);
 781
 782                get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
 783                                 NULL);
 784                data->got_remote_heads = 1;
 785        }
 786
 787        memset(&args, 0, sizeof(args));
 788        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
 789        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
 790        args.use_thin_pack = data->options.thin;
 791        args.verbose = (transport->verbose > 0);
 792        args.quiet = (transport->verbose < 0);
 793        args.progress = transport->progress;
 794        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 795        args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
 796
 797        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 798                        &data->extra_have);
 799
 800        close(data->fd[1]);
 801        close(data->fd[0]);
 802        ret |= finish_connect(data->conn);
 803        data->conn = NULL;
 804        data->got_remote_heads = 0;
 805
 806        return ret;
 807}
 808
 809static int connect_git(struct transport *transport, const char *name,
 810                       const char *executable, int fd[2])
 811{
 812        struct git_transport_data *data = transport->data;
 813        data->conn = git_connect(data->fd, transport->url,
 814                                 executable, 0);
 815        fd[0] = data->fd[0];
 816        fd[1] = data->fd[1];
 817        return 0;
 818}
 819
 820static int disconnect_git(struct transport *transport)
 821{
 822        struct git_transport_data *data = transport->data;
 823        if (data->conn) {
 824                if (data->got_remote_heads)
 825                        packet_flush(data->fd[1]);
 826                close(data->fd[0]);
 827                close(data->fd[1]);
 828                finish_connect(data->conn);
 829        }
 830
 831        free(data);
 832        return 0;
 833}
 834
 835void transport_take_over(struct transport *transport,
 836                         struct child_process *child)
 837{
 838        struct git_transport_data *data;
 839
 840        if (!transport->smart_options)
 841                die("Bug detected: Taking over transport requires non-NULL "
 842                    "smart_options field.");
 843
 844        data = xcalloc(1, sizeof(*data));
 845        data->options = *transport->smart_options;
 846        data->conn = child;
 847        data->fd[0] = data->conn->out;
 848        data->fd[1] = data->conn->in;
 849        data->got_remote_heads = 0;
 850        transport->data = data;
 851
 852        transport->set_option = NULL;
 853        transport->get_refs_list = get_refs_via_connect;
 854        transport->fetch = fetch_refs_via_pack;
 855        transport->push = NULL;
 856        transport->push_refs = git_transport_push;
 857        transport->disconnect = disconnect_git;
 858        transport->smart_options = &(data->options);
 859}
 860
 861static int is_local(const char *url)
 862{
 863        const char *colon = strchr(url, ':');
 864        const char *slash = strchr(url, '/');
 865        return !colon || (slash && slash < colon) ||
 866                has_dos_drive_prefix(url);
 867}
 868
 869static int is_file(const char *url)
 870{
 871        struct stat buf;
 872        if (stat(url, &buf))
 873                return 0;
 874        return S_ISREG(buf.st_mode);
 875}
 876
 877static int external_specification_len(const char *url)
 878{
 879        return strchr(url, ':') - url;
 880}
 881
 882struct transport *transport_get(struct remote *remote, const char *url)
 883{
 884        const char *helper;
 885        struct transport *ret = xcalloc(1, sizeof(*ret));
 886
 887        ret->progress = isatty(2);
 888
 889        if (!remote)
 890                die("No remote provided to transport_get()");
 891
 892        ret->got_remote_refs = 0;
 893        ret->remote = remote;
 894        helper = remote->foreign_vcs;
 895
 896        if (!url && remote->url)
 897                url = remote->url[0];
 898        ret->url = url;
 899
 900        /* maybe it is a foreign URL? */
 901        if (url) {
 902                const char *p = url;
 903
 904                while (is_urlschemechar(p == url, *p))
 905                        p++;
 906                if (!prefixcmp(p, "::"))
 907                        helper = xstrndup(url, p - url);
 908        }
 909
 910        if (helper) {
 911                transport_helper_init(ret, helper);
 912        } else if (!prefixcmp(url, "rsync:")) {
 913                ret->get_refs_list = get_refs_via_rsync;
 914                ret->fetch = fetch_objs_via_rsync;
 915                ret->push = rsync_transport_push;
 916                ret->smart_options = NULL;
 917        } else if (is_local(url) && is_file(url)) {
 918                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 919                ret->data = data;
 920                ret->get_refs_list = get_refs_from_bundle;
 921                ret->fetch = fetch_refs_from_bundle;
 922                ret->disconnect = close_bundle;
 923                ret->smart_options = NULL;
 924        } else if (!is_url(url)
 925                || !prefixcmp(url, "file://")
 926                || !prefixcmp(url, "git://")
 927                || !prefixcmp(url, "ssh://")
 928                || !prefixcmp(url, "git+ssh://")
 929                || !prefixcmp(url, "ssh+git://")) {
 930                /* These are builtin smart transports. */
 931                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 932                ret->data = data;
 933                ret->set_option = NULL;
 934                ret->get_refs_list = get_refs_via_connect;
 935                ret->fetch = fetch_refs_via_pack;
 936                ret->push_refs = git_transport_push;
 937                ret->connect = connect_git;
 938                ret->disconnect = disconnect_git;
 939                ret->smart_options = &(data->options);
 940
 941                data->conn = NULL;
 942                data->got_remote_heads = 0;
 943        } else {
 944                /* Unknown protocol in URL. Pass to external handler. */
 945                int len = external_specification_len(url);
 946                char *handler = xmalloc(len + 1);
 947                handler[len] = 0;
 948                strncpy(handler, url, len);
 949                transport_helper_init(ret, handler);
 950        }
 951
 952        if (ret->smart_options) {
 953                ret->smart_options->thin = 1;
 954                ret->smart_options->uploadpack = "git-upload-pack";
 955                if (remote->uploadpack)
 956                        ret->smart_options->uploadpack = remote->uploadpack;
 957                ret->smart_options->receivepack = "git-receive-pack";
 958                if (remote->receivepack)
 959                        ret->smart_options->receivepack = remote->receivepack;
 960        }
 961
 962        return ret;
 963}
 964
 965int transport_set_option(struct transport *transport,
 966                         const char *name, const char *value)
 967{
 968        int git_reports = 1, protocol_reports = 1;
 969
 970        if (transport->smart_options)
 971                git_reports = set_git_option(transport->smart_options,
 972                                             name, value);
 973
 974        if (transport->set_option)
 975                protocol_reports = transport->set_option(transport, name,
 976                                                        value);
 977
 978        /* If either report is 0, report 0 (success). */
 979        if (!git_reports || !protocol_reports)
 980                return 0;
 981        /* If either reports -1 (invalid value), report -1. */
 982        if ((git_reports == -1) || (protocol_reports == -1))
 983                return -1;
 984        /* Otherwise if both report unknown, report unknown. */
 985        return 1;
 986}
 987
 988void transport_set_verbosity(struct transport *transport, int verbosity,
 989        int force_progress)
 990{
 991        if (verbosity >= 2)
 992                transport->verbose = verbosity <= 3 ? verbosity : 3;
 993        if (verbosity < 0)
 994                transport->verbose = -1;
 995
 996        /**
 997         * Rules used to determine whether to report progress (processing aborts
 998         * when a rule is satisfied):
 999         *
1000         *   1. Report progress, if force_progress is 1 (ie. --progress).
1001         *   2. Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
1002         *   3. Report progress if isatty(2) is 1.
1003         **/
1004        transport->progress = force_progress || (verbosity >= 0 && isatty(2));
1005}
1006
1007int transport_push(struct transport *transport,
1008                   int refspec_nr, const char **refspec, int flags,
1009                   int *nonfastforward)
1010{
1011        *nonfastforward = 0;
1012        transport_verify_remote_names(refspec_nr, refspec);
1013
1014        if (transport->push) {
1015                /* Maybe FIXME. But no important transport uses this case. */
1016                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1017                        die("This transport does not support using --set-upstream");
1018
1019                return transport->push(transport, refspec_nr, refspec, flags);
1020        } else if (transport->push_refs) {
1021                struct ref *remote_refs =
1022                        transport->get_refs_list(transport, 1);
1023                struct ref *local_refs = get_local_heads();
1024                int match_flags = MATCH_REFS_NONE;
1025                int verbose = (transport->verbose > 0);
1026                int quiet = (transport->verbose < 0);
1027                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1028                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1029                int push_ret, ret, err;
1030
1031                if (flags & TRANSPORT_PUSH_ALL)
1032                        match_flags |= MATCH_REFS_ALL;
1033                if (flags & TRANSPORT_PUSH_MIRROR)
1034                        match_flags |= MATCH_REFS_MIRROR;
1035
1036                if (match_refs(local_refs, &remote_refs,
1037                               refspec_nr, refspec, match_flags)) {
1038                        return -1;
1039                }
1040
1041                set_ref_status_for_push(remote_refs,
1042                        flags & TRANSPORT_PUSH_MIRROR,
1043                        flags & TRANSPORT_PUSH_FORCE);
1044
1045                if ((flags & TRANSPORT_RECURSE_SUBMODULES_CHECK) && !is_bare_repository()) {
1046                        struct ref *ref = remote_refs;
1047                        for (; ref; ref = ref->next)
1048                                if (!is_null_sha1(ref->new_sha1) &&
1049                                    check_submodule_needs_pushing(ref->new_sha1,transport->remote->name))
1050                                        die("There are unpushed submodules, aborting.");
1051                }
1052
1053                push_ret = transport->push_refs(transport, remote_refs, flags);
1054                err = push_had_errors(remote_refs);
1055                ret = push_ret | err;
1056
1057                if (!quiet || err)
1058                        transport_print_push_status(transport->url, remote_refs,
1059                                        verbose | porcelain, porcelain,
1060                                        nonfastforward);
1061
1062                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1063                        set_upstreams(transport, remote_refs, pretend);
1064
1065                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1066                        struct ref *ref;
1067                        for (ref = remote_refs; ref; ref = ref->next)
1068                                transport_update_tracking_ref(transport->remote, ref, verbose);
1069                }
1070
1071                if (porcelain && !push_ret)
1072                        puts("Done");
1073                else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
1074                        fprintf(stderr, "Everything up-to-date\n");
1075
1076                return ret;
1077        }
1078        return 1;
1079}
1080
1081const struct ref *transport_get_remote_refs(struct transport *transport)
1082{
1083        if (!transport->got_remote_refs) {
1084                transport->remote_refs = transport->get_refs_list(transport, 0);
1085                transport->got_remote_refs = 1;
1086        }
1087
1088        return transport->remote_refs;
1089}
1090
1091int transport_fetch_refs(struct transport *transport, struct ref *refs)
1092{
1093        int rc;
1094        int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
1095        struct ref **heads = NULL;
1096        struct ref *rm;
1097
1098        for (rm = refs; rm; rm = rm->next) {
1099                nr_refs++;
1100                if (rm->peer_ref &&
1101                    !is_null_sha1(rm->old_sha1) &&
1102                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
1103                        continue;
1104                ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
1105                heads[nr_heads++] = rm;
1106        }
1107
1108        if (!nr_heads) {
1109                /*
1110                 * When deepening of a shallow repository is requested,
1111                 * then local and remote refs are likely to still be equal.
1112                 * Just feed them all to the fetch method in that case.
1113                 * This condition shouldn't be met in a non-deepening fetch
1114                 * (see builtin-fetch.c:quickfetch()).
1115                 */
1116                heads = xmalloc(nr_refs * sizeof(*heads));
1117                for (rm = refs; rm; rm = rm->next)
1118                        heads[nr_heads++] = rm;
1119        }
1120
1121        rc = transport->fetch(transport, nr_heads, heads);
1122
1123        free(heads);
1124        return rc;
1125}
1126
1127void transport_unlock_pack(struct transport *transport)
1128{
1129        if (transport->pack_lockfile) {
1130                unlink_or_warn(transport->pack_lockfile);
1131                free(transport->pack_lockfile);
1132                transport->pack_lockfile = NULL;
1133        }
1134}
1135
1136int transport_connect(struct transport *transport, const char *name,
1137                      const char *exec, int fd[2])
1138{
1139        if (transport->connect)
1140                return transport->connect(transport, name, exec, fd);
1141        else
1142                die("Operation not supported by protocol");
1143}
1144
1145int transport_disconnect(struct transport *transport)
1146{
1147        int ret = 0;
1148        if (transport->disconnect)
1149                ret = transport->disconnect(transport);
1150        free(transport);
1151        return ret;
1152}
1153
1154/*
1155 * Strip username (and password) from an url and return
1156 * it in a newly allocated string.
1157 */
1158char *transport_anonymize_url(const char *url)
1159{
1160        char *anon_url, *scheme_prefix, *anon_part;
1161        size_t anon_len, prefix_len = 0;
1162
1163        anon_part = strchr(url, '@');
1164        if (is_local(url) || !anon_part)
1165                goto literal_copy;
1166
1167        anon_len = strlen(++anon_part);
1168        scheme_prefix = strstr(url, "://");
1169        if (!scheme_prefix) {
1170                if (!strchr(anon_part, ':'))
1171                        /* cannot be "me@there:/path/name" */
1172                        goto literal_copy;
1173        } else {
1174                const char *cp;
1175                /* make sure scheme is reasonable */
1176                for (cp = url; cp < scheme_prefix; cp++) {
1177                        switch (*cp) {
1178                                /* RFC 1738 2.1 */
1179                        case '+': case '.': case '-':
1180                                break; /* ok */
1181                        default:
1182                                if (isalnum(*cp))
1183                                        break;
1184                                /* it isn't */
1185                                goto literal_copy;
1186                        }
1187                }
1188                /* @ past the first slash does not count */
1189                cp = strchr(scheme_prefix + 3, '/');
1190                if (cp && cp < anon_part)
1191                        goto literal_copy;
1192                prefix_len = scheme_prefix - url + 3;
1193        }
1194        anon_url = xcalloc(1, 1 + prefix_len + anon_len);
1195        memcpy(anon_url, url, prefix_len);
1196        memcpy(anon_url + prefix_len, anon_part, anon_len);
1197        return anon_url;
1198literal_copy:
1199        return xstrdup(url);
1200}
1201
1202struct alternate_refs_data {
1203        alternate_ref_fn *fn;
1204        void *data;
1205};
1206
1207static int refs_from_alternate_cb(struct alternate_object_database *e,
1208                                  void *data)
1209{
1210        char *other;
1211        size_t len;
1212        struct remote *remote;
1213        struct transport *transport;
1214        const struct ref *extra;
1215        struct alternate_refs_data *cb = data;
1216
1217        e->name[-1] = '\0';
1218        other = xstrdup(real_path(e->base));
1219        e->name[-1] = '/';
1220        len = strlen(other);
1221
1222        while (other[len-1] == '/')
1223                other[--len] = '\0';
1224        if (len < 8 || memcmp(other + len - 8, "/objects", 8))
1225                return 0;
1226        /* Is this a git repository with refs? */
1227        memcpy(other + len - 8, "/refs", 6);
1228        if (!is_directory(other))
1229                return 0;
1230        other[len - 8] = '\0';
1231        remote = remote_get(other);
1232        transport = transport_get(remote, other);
1233        for (extra = transport_get_remote_refs(transport);
1234             extra;
1235             extra = extra->next)
1236                cb->fn(extra, cb->data);
1237        transport_disconnect(transport);
1238        free(other);
1239        return 0;
1240}
1241
1242void for_each_alternate_ref(alternate_ref_fn fn, void *data)
1243{
1244        struct alternate_refs_data cb;
1245        cb.fn = fn;
1246        cb.data = data;
1247        foreach_alt_odb(refs_from_alternate_cb, &cb);
1248}