Andrew's git / gitweb.git / transport.c
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transport.con commit git-am: Add am.keepcr and --no-keep-cr to override it (e80d4cb)
   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
  13/* rsync support */
  14
  15/*
  16 * We copy packed-refs and refs/ into a temporary file, then read the
  17 * loose refs recursively (sorting whenever possible), and then inserting
  18 * those packed refs that are not yet in the list (not validating, but
  19 * assuming that the file is sorted).
  20 *
  21 * Appears refactoring this from refs.c is too cumbersome.
  22 */
  23
  24static int str_cmp(const void *a, const void *b)
  25{
  26        const char *s1 = a;
  27        const char *s2 = b;
  28
  29        return strcmp(s1, s2);
  30}
  31
  32/* path->buf + name_offset is expected to point to "refs/" */
  33
  34static int read_loose_refs(struct strbuf *path, int name_offset,
  35                struct ref **tail)
  36{
  37        DIR *dir = opendir(path->buf);
  38        struct dirent *de;
  39        struct {
  40                char **entries;
  41                int nr, alloc;
  42        } list;
  43        int i, pathlen;
  44
  45        if (!dir)
  46                return -1;
  47
  48        memset (&list, 0, sizeof(list));
  49
  50        while ((de = readdir(dir))) {
  51                if (is_dot_or_dotdot(de->d_name))
  52                        continue;
  53                ALLOC_GROW(list.entries, list.nr + 1, list.alloc);
  54                list.entries[list.nr++] = xstrdup(de->d_name);
  55        }
  56        closedir(dir);
  57
  58        /* sort the list */
  59
  60        qsort(list.entries, list.nr, sizeof(char *), str_cmp);
  61
  62        pathlen = path->len;
  63        strbuf_addch(path, '/');
  64
  65        for (i = 0; i < list.nr; i++, strbuf_setlen(path, pathlen + 1)) {
  66                strbuf_addstr(path, list.entries[i]);
  67                if (read_loose_refs(path, name_offset, tail)) {
  68                        int fd = open(path->buf, O_RDONLY);
  69                        char buffer[40];
  70                        struct ref *next;
  71
  72                        if (fd < 0)
  73                                continue;
  74                        next = alloc_ref(path->buf + name_offset);
  75                        if (read_in_full(fd, buffer, 40) != 40 ||
  76                                        get_sha1_hex(buffer, next->old_sha1)) {
  77                                close(fd);
  78                                free(next);
  79                                continue;
  80                        }
  81                        close(fd);
  82                        (*tail)->next = next;
  83                        *tail = next;
  84                }
  85        }
  86        strbuf_setlen(path, pathlen);
  87
  88        for (i = 0; i < list.nr; i++)
  89                free(list.entries[i]);
  90        free(list.entries);
  91
  92        return 0;
  93}
  94
  95/* insert the packed refs for which no loose refs were found */
  96
  97static void insert_packed_refs(const char *packed_refs, struct ref **list)
  98{
  99        FILE *f = fopen(packed_refs, "r");
 100        static char buffer[PATH_MAX];
 101
 102        if (!f)
 103                return;
 104
 105        for (;;) {
 106                int cmp = cmp, len;
 107
 108                if (!fgets(buffer, sizeof(buffer), f)) {
 109                        fclose(f);
 110                        return;
 111                }
 112
 113                if (hexval(buffer[0]) > 0xf)
 114                        continue;
 115                len = strlen(buffer);
 116                if (len && buffer[len - 1] == '\n')
 117                        buffer[--len] = '\0';
 118                if (len < 41)
 119                        continue;
 120                while ((*list)->next &&
 121                                (cmp = strcmp(buffer + 41,
 122                                      (*list)->next->name)) > 0)
 123                        list = &(*list)->next;
 124                if (!(*list)->next || cmp < 0) {
 125                        struct ref *next = alloc_ref(buffer + 41);
 126                        buffer[40] = '\0';
 127                        if (get_sha1_hex(buffer, next->old_sha1)) {
 128                                warning ("invalid SHA-1: %s", buffer);
 129                                free(next);
 130                                continue;
 131                        }
 132                        next->next = (*list)->next;
 133                        (*list)->next = next;
 134                        list = &(*list)->next;
 135                }
 136        }
 137}
 138
 139static void set_upstreams(struct transport *transport, struct ref *refs,
 140        int pretend)
 141{
 142        struct ref *ref;
 143        for (ref = refs; ref; ref = ref->next) {
 144                const char *localname;
 145                const char *tmp;
 146                const char *remotename;
 147                unsigned char sha[20];
 148                int flag = 0;
 149                /*
 150                 * Check suitability for tracking. Must be successful /
 151                 * already up-to-date ref create/modify (not delete).
 152                 */
 153                if (ref->status != REF_STATUS_OK &&
 154                        ref->status != REF_STATUS_UPTODATE)
 155                        continue;
 156                if (!ref->peer_ref)
 157                        continue;
 158                if (!ref->new_sha1 || is_null_sha1(ref->new_sha1))
 159                        continue;
 160
 161                /* Follow symbolic refs (mainly for HEAD). */
 162                localname = ref->peer_ref->name;
 163                remotename = ref->name;
 164                tmp = resolve_ref(localname, sha, 1, &flag);
 165                if (tmp && flag & REF_ISSYMREF &&
 166                        !prefixcmp(tmp, "refs/heads/"))
 167                        localname = tmp;
 168
 169                /* Both source and destination must be local branches. */
 170                if (!localname || prefixcmp(localname, "refs/heads/"))
 171                        continue;
 172                if (!remotename || prefixcmp(remotename, "refs/heads/"))
 173                        continue;
 174
 175                if (!pretend)
 176                        install_branch_config(BRANCH_CONFIG_VERBOSE,
 177                                localname + 11, transport->remote->name,
 178                                remotename);
 179                else
 180                        printf("Would set upstream of '%s' to '%s' of '%s'\n",
 181                                localname + 11, remotename + 11,
 182                                transport->remote->name);
 183        }
 184}
 185
 186static const char *rsync_url(const char *url)
 187{
 188        return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 189}
 190
 191static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 192{
 193        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 194        struct ref dummy = {0}, *tail = &dummy;
 195        struct child_process rsync;
 196        const char *args[5];
 197        int temp_dir_len;
 198
 199        if (for_push)
 200                return NULL;
 201
 202        /* copy the refs to the temporary directory */
 203
 204        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 205        if (!mkdtemp(temp_dir.buf))
 206                die_errno ("Could not make temporary directory");
 207        temp_dir_len = temp_dir.len;
 208
 209        strbuf_addstr(&buf, rsync_url(transport->url));
 210        strbuf_addstr(&buf, "/refs");
 211
 212        memset(&rsync, 0, sizeof(rsync));
 213        rsync.argv = args;
 214        rsync.stdout_to_stderr = 1;
 215        args[0] = "rsync";
 216        args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 217        args[2] = buf.buf;
 218        args[3] = temp_dir.buf;
 219        args[4] = NULL;
 220
 221        if (run_command(&rsync))
 222                die ("Could not run rsync to get refs");
 223
 224        strbuf_reset(&buf);
 225        strbuf_addstr(&buf, rsync_url(transport->url));
 226        strbuf_addstr(&buf, "/packed-refs");
 227
 228        args[2] = buf.buf;
 229
 230        if (run_command(&rsync))
 231                die ("Could not run rsync to get refs");
 232
 233        /* read the copied refs */
 234
 235        strbuf_addstr(&temp_dir, "/refs");
 236        read_loose_refs(&temp_dir, temp_dir_len + 1, &tail);
 237        strbuf_setlen(&temp_dir, temp_dir_len);
 238
 239        tail = &dummy;
 240        strbuf_addstr(&temp_dir, "/packed-refs");
 241        insert_packed_refs(temp_dir.buf, &tail);
 242        strbuf_setlen(&temp_dir, temp_dir_len);
 243
 244        if (remove_dir_recursively(&temp_dir, 0))
 245                warning ("Error removing temporary directory %s.",
 246                                temp_dir.buf);
 247
 248        strbuf_release(&buf);
 249        strbuf_release(&temp_dir);
 250
 251        return dummy.next;
 252}
 253
 254static int fetch_objs_via_rsync(struct transport *transport,
 255                                int nr_objs, struct ref **to_fetch)
 256{
 257        struct strbuf buf = STRBUF_INIT;
 258        struct child_process rsync;
 259        const char *args[8];
 260        int result;
 261
 262        strbuf_addstr(&buf, rsync_url(transport->url));
 263        strbuf_addstr(&buf, "/objects/");
 264
 265        memset(&rsync, 0, sizeof(rsync));
 266        rsync.argv = args;
 267        rsync.stdout_to_stderr = 1;
 268        args[0] = "rsync";
 269        args[1] = (transport->verbose > 0) ? "-rv" : "-r";
 270        args[2] = "--ignore-existing";
 271        args[3] = "--exclude";
 272        args[4] = "info";
 273        args[5] = buf.buf;
 274        args[6] = get_object_directory();
 275        args[7] = NULL;
 276
 277        /* NEEDSWORK: handle one level of alternates */
 278        result = run_command(&rsync);
 279
 280        strbuf_release(&buf);
 281
 282        return result;
 283}
 284
 285static int write_one_ref(const char *name, const unsigned char *sha1,
 286                int flags, void *data)
 287{
 288        struct strbuf *buf = data;
 289        int len = buf->len;
 290        FILE *f;
 291
 292        /* when called via for_each_ref(), flags is non-zero */
 293        if (flags && prefixcmp(name, "refs/heads/") &&
 294                        prefixcmp(name, "refs/tags/"))
 295                return 0;
 296
 297        strbuf_addstr(buf, name);
 298        if (safe_create_leading_directories(buf->buf) ||
 299                        !(f = fopen(buf->buf, "w")) ||
 300                        fprintf(f, "%s\n", sha1_to_hex(sha1)) < 0 ||
 301                        fclose(f))
 302                return error("problems writing temporary file %s", buf->buf);
 303        strbuf_setlen(buf, len);
 304        return 0;
 305}
 306
 307static int write_refs_to_temp_dir(struct strbuf *temp_dir,
 308                int refspec_nr, const char **refspec)
 309{
 310        int i;
 311
 312        for (i = 0; i < refspec_nr; i++) {
 313                unsigned char sha1[20];
 314                char *ref;
 315
 316                if (dwim_ref(refspec[i], strlen(refspec[i]), sha1, &ref) != 1)
 317                        return error("Could not get ref %s", refspec[i]);
 318
 319                if (write_one_ref(ref, sha1, 0, temp_dir)) {
 320                        free(ref);
 321                        return -1;
 322                }
 323                free(ref);
 324        }
 325        return 0;
 326}
 327
 328static int rsync_transport_push(struct transport *transport,
 329                int refspec_nr, const char **refspec, int flags)
 330{
 331        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
 332        int result = 0, i;
 333        struct child_process rsync;
 334        const char *args[10];
 335
 336        if (flags & TRANSPORT_PUSH_MIRROR)
 337                return error("rsync transport does not support mirror mode");
 338
 339        /* first push the objects */
 340
 341        strbuf_addstr(&buf, rsync_url(transport->url));
 342        strbuf_addch(&buf, '/');
 343
 344        memset(&rsync, 0, sizeof(rsync));
 345        rsync.argv = args;
 346        rsync.stdout_to_stderr = 1;
 347        i = 0;
 348        args[i++] = "rsync";
 349        args[i++] = "-a";
 350        if (flags & TRANSPORT_PUSH_DRY_RUN)
 351                args[i++] = "--dry-run";
 352        if (transport->verbose > 0)
 353                args[i++] = "-v";
 354        args[i++] = "--ignore-existing";
 355        args[i++] = "--exclude";
 356        args[i++] = "info";
 357        args[i++] = get_object_directory();
 358        args[i++] = buf.buf;
 359        args[i++] = NULL;
 360
 361        if (run_command(&rsync))
 362                return error("Could not push objects to %s",
 363                                rsync_url(transport->url));
 364
 365        /* copy the refs to the temporary directory; they could be packed. */
 366
 367        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
 368        if (!mkdtemp(temp_dir.buf))
 369                die_errno ("Could not make temporary directory");
 370        strbuf_addch(&temp_dir, '/');
 371
 372        if (flags & TRANSPORT_PUSH_ALL) {
 373                if (for_each_ref(write_one_ref, &temp_dir))
 374                        return -1;
 375        } else if (write_refs_to_temp_dir(&temp_dir, refspec_nr, refspec))
 376                return -1;
 377
 378        i = 2;
 379        if (flags & TRANSPORT_PUSH_DRY_RUN)
 380                args[i++] = "--dry-run";
 381        if (!(flags & TRANSPORT_PUSH_FORCE))
 382                args[i++] = "--ignore-existing";
 383        args[i++] = temp_dir.buf;
 384        args[i++] = rsync_url(transport->url);
 385        args[i++] = NULL;
 386        if (run_command(&rsync))
 387                result = error("Could not push to %s",
 388                                rsync_url(transport->url));
 389
 390        if (remove_dir_recursively(&temp_dir, 0))
 391                warning ("Could not remove temporary directory %s.",
 392                                temp_dir.buf);
 393
 394        strbuf_release(&buf);
 395        strbuf_release(&temp_dir);
 396
 397        return result;
 398}
 399
 400struct bundle_transport_data {
 401        int fd;
 402        struct bundle_header header;
 403};
 404
 405static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 406{
 407        struct bundle_transport_data *data = transport->data;
 408        struct ref *result = NULL;
 409        int i;
 410
 411        if (for_push)
 412                return NULL;
 413
 414        if (data->fd > 0)
 415                close(data->fd);
 416        data->fd = read_bundle_header(transport->url, &data->header);
 417        if (data->fd < 0)
 418                die ("Could not read bundle '%s'.", transport->url);
 419        for (i = 0; i < data->header.references.nr; i++) {
 420                struct ref_list_entry *e = data->header.references.list + i;
 421                struct ref *ref = alloc_ref(e->name);
 422                hashcpy(ref->old_sha1, e->sha1);
 423                ref->next = result;
 424                result = ref;
 425        }
 426        return result;
 427}
 428
 429static int fetch_refs_from_bundle(struct transport *transport,
 430                               int nr_heads, struct ref **to_fetch)
 431{
 432        struct bundle_transport_data *data = transport->data;
 433        return unbundle(&data->header, data->fd);
 434}
 435
 436static int close_bundle(struct transport *transport)
 437{
 438        struct bundle_transport_data *data = transport->data;
 439        if (data->fd > 0)
 440                close(data->fd);
 441        free(data);
 442        return 0;
 443}
 444
 445struct git_transport_data {
 446        struct git_transport_options options;
 447        struct child_process *conn;
 448        int fd[2];
 449        unsigned got_remote_heads : 1;
 450        struct extra_have_objects extra_have;
 451};
 452
 453static int set_git_option(struct git_transport_options *opts,
 454                          const char *name, const char *value)
 455{
 456        if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
 457                opts->uploadpack = value;
 458                return 0;
 459        } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
 460                opts->receivepack = value;
 461                return 0;
 462        } else if (!strcmp(name, TRANS_OPT_THIN)) {
 463                opts->thin = !!value;
 464                return 0;
 465        } else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
 466                opts->followtags = !!value;
 467                return 0;
 468        } else if (!strcmp(name, TRANS_OPT_KEEP)) {
 469                opts->keep = !!value;
 470                return 0;
 471        } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
 472                if (!value)
 473                        opts->depth = 0;
 474                else
 475                        opts->depth = atoi(value);
 476                return 0;
 477        }
 478        return 1;
 479}
 480
 481static int connect_setup(struct transport *transport, int for_push, int verbose)
 482{
 483        struct git_transport_data *data = transport->data;
 484
 485        if (data->conn)
 486                return 0;
 487
 488        data->conn = git_connect(data->fd, transport->url,
 489                                 for_push ? data->options.receivepack :
 490                                 data->options.uploadpack,
 491                                 verbose ? CONNECT_VERBOSE : 0);
 492
 493        return 0;
 494}
 495
 496static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 497{
 498        struct git_transport_data *data = transport->data;
 499        struct ref *refs;
 500
 501        connect_setup(transport, for_push, 0);
 502        get_remote_heads(data->fd[0], &refs, 0, NULL,
 503                         for_push ? REF_NORMAL : 0, &data->extra_have);
 504        data->got_remote_heads = 1;
 505
 506        return refs;
 507}
 508
 509static int fetch_refs_via_pack(struct transport *transport,
 510                               int nr_heads, struct ref **to_fetch)
 511{
 512        struct git_transport_data *data = transport->data;
 513        char **heads = xmalloc(nr_heads * sizeof(*heads));
 514        char **origh = xmalloc(nr_heads * sizeof(*origh));
 515        const struct ref *refs;
 516        char *dest = xstrdup(transport->url);
 517        struct fetch_pack_args args;
 518        int i;
 519        struct ref *refs_tmp = NULL;
 520
 521        memset(&args, 0, sizeof(args));
 522        args.uploadpack = data->options.uploadpack;
 523        args.keep_pack = data->options.keep;
 524        args.lock_pack = 1;
 525        args.use_thin_pack = data->options.thin;
 526        args.include_tag = data->options.followtags;
 527        args.verbose = (transport->verbose > 0);
 528        args.quiet = (transport->verbose < 0);
 529        args.no_progress = args.quiet || (!transport->progress && !isatty(2));
 530        args.depth = data->options.depth;
 531
 532        for (i = 0; i < nr_heads; i++)
 533                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 534
 535        if (!data->got_remote_heads) {
 536                connect_setup(transport, 0, 0);
 537                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
 538                data->got_remote_heads = 1;
 539        }
 540
 541        refs = fetch_pack(&args, data->fd, data->conn,
 542                          refs_tmp ? refs_tmp : transport->remote_refs,
 543                          dest, nr_heads, heads, &transport->pack_lockfile);
 544        close(data->fd[0]);
 545        close(data->fd[1]);
 546        if (finish_connect(data->conn))
 547                refs = NULL;
 548        data->conn = NULL;
 549        data->got_remote_heads = 0;
 550
 551        free_refs(refs_tmp);
 552
 553        for (i = 0; i < nr_heads; i++)
 554                free(origh[i]);
 555        free(origh);
 556        free(heads);
 557        free(dest);
 558        return (refs ? 0 : -1);
 559}
 560
 561static int push_had_errors(struct ref *ref)
 562{
 563        for (; ref; ref = ref->next) {
 564                switch (ref->status) {
 565                case REF_STATUS_NONE:
 566                case REF_STATUS_UPTODATE:
 567                case REF_STATUS_OK:
 568                        break;
 569                default:
 570                        return 1;
 571                }
 572        }
 573        return 0;
 574}
 575
 576static int refs_pushed(struct ref *ref)
 577{
 578        for (; ref; ref = ref->next) {
 579                switch(ref->status) {
 580                case REF_STATUS_NONE:
 581                case REF_STATUS_UPTODATE:
 582                        break;
 583                default:
 584                        return 1;
 585                }
 586        }
 587        return 0;
 588}
 589
 590static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
 591{
 592        struct refspec rs;
 593
 594        if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
 595                return;
 596
 597        rs.src = ref->name;
 598        rs.dst = NULL;
 599
 600        if (!remote_find_tracking(remote, &rs)) {
 601                if (verbose)
 602                        fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
 603                if (ref->deletion) {
 604                        delete_ref(rs.dst, NULL, 0);
 605                } else
 606                        update_ref("update by push", rs.dst,
 607                                        ref->new_sha1, NULL, 0, 0);
 608                free(rs.dst);
 609        }
 610}
 611
 612#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 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, 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(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
 714static void 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
 741static void 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 = !!(flags & TRANSPORT_PUSH_VERBOSE);
 792        args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
 793        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 794
 795        ret = send_pack(&args, data->fd, data->conn, remote_refs,
 796                        &data->extra_have);
 797
 798        close(data->fd[1]);
 799        close(data->fd[0]);
 800        ret |= finish_connect(data->conn);
 801        data->conn = NULL;
 802        data->got_remote_heads = 0;
 803
 804        return ret;
 805}
 806
 807static int connect_git(struct transport *transport, const char *name,
 808                       const char *executable, int fd[2])
 809{
 810        struct git_transport_data *data = transport->data;
 811        data->conn = git_connect(data->fd, transport->url,
 812                                 executable, 0);
 813        fd[0] = data->fd[0];
 814        fd[1] = data->fd[1];
 815        return 0;
 816}
 817
 818static int disconnect_git(struct transport *transport)
 819{
 820        struct git_transport_data *data = transport->data;
 821        if (data->conn) {
 822                if (data->got_remote_heads)
 823                        packet_flush(data->fd[1]);
 824                close(data->fd[0]);
 825                close(data->fd[1]);
 826                finish_connect(data->conn);
 827        }
 828
 829        free(data);
 830        return 0;
 831}
 832
 833void transport_take_over(struct transport *transport,
 834                         struct child_process *child)
 835{
 836        struct git_transport_data *data;
 837
 838        if (!transport->smart_options)
 839                die("Bug detected: Taking over transport requires non-NULL "
 840                    "smart_options field.");
 841
 842        data = xcalloc(1, sizeof(*data));
 843        data->options = *transport->smart_options;
 844        data->conn = child;
 845        data->fd[0] = data->conn->out;
 846        data->fd[1] = data->conn->in;
 847        data->got_remote_heads = 0;
 848        transport->data = data;
 849
 850        transport->set_option = NULL;
 851        transport->get_refs_list = get_refs_via_connect;
 852        transport->fetch = fetch_refs_via_pack;
 853        transport->push = NULL;
 854        transport->push_refs = git_transport_push;
 855        transport->disconnect = disconnect_git;
 856        transport->smart_options = &(data->options);
 857}
 858
 859static int is_local(const char *url)
 860{
 861        const char *colon = strchr(url, ':');
 862        const char *slash = strchr(url, '/');
 863        return !colon || (slash && slash < colon) ||
 864                has_dos_drive_prefix(url);
 865}
 866
 867static int is_file(const char *url)
 868{
 869        struct stat buf;
 870        if (stat(url, &buf))
 871                return 0;
 872        return S_ISREG(buf.st_mode);
 873}
 874
 875static int is_url(const char *url)
 876{
 877        const char *url2, *first_slash;
 878
 879        if (!url)
 880                return 0;
 881        url2 = url;
 882        first_slash = strchr(url, '/');
 883
 884        /* Input with no slash at all or slash first can't be URL. */
 885        if (!first_slash || first_slash == url)
 886                return 0;
 887        /* Character before must be : and next must be /. */
 888        if (first_slash[-1] != ':' || first_slash[1] != '/')
 889                return 0;
 890        /* There must be something before the :// */
 891        if (first_slash == url + 1)
 892                return 0;
 893        /*
 894         * Check all characters up to first slash - 1. Only alphanum
 895         * is allowed.
 896         */
 897        url2 = url;
 898        while (url2 < first_slash - 1) {
 899                if (!isalnum((unsigned char)*url2))
 900                        return 0;
 901                url2++;
 902        }
 903
 904        /* Valid enough. */
 905        return 1;
 906}
 907
 908static int external_specification_len(const char *url)
 909{
 910        return strchr(url, ':') - url;
 911}
 912
 913struct transport *transport_get(struct remote *remote, const char *url)
 914{
 915        const char *helper;
 916        struct transport *ret = xcalloc(1, sizeof(*ret));
 917
 918        if (!remote)
 919                die("No remote provided to transport_get()");
 920
 921        ret->got_remote_refs = 0;
 922        ret->remote = remote;
 923        helper = remote->foreign_vcs;
 924
 925        if (!url && remote->url)
 926                url = remote->url[0];
 927        ret->url = url;
 928
 929        /* maybe it is a foreign URL? */
 930        if (url) {
 931                const char *p = url;
 932
 933                while (isalnum(*p))
 934                        p++;
 935                if (!prefixcmp(p, "::"))
 936                        helper = xstrndup(url, p - url);
 937        }
 938
 939        if (helper) {
 940                transport_helper_init(ret, helper);
 941        } else if (!prefixcmp(url, "rsync:")) {
 942                ret->get_refs_list = get_refs_via_rsync;
 943                ret->fetch = fetch_objs_via_rsync;
 944                ret->push = rsync_transport_push;
 945                ret->smart_options = NULL;
 946        } else if (is_local(url) && is_file(url)) {
 947                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
 948                ret->data = data;
 949                ret->get_refs_list = get_refs_from_bundle;
 950                ret->fetch = fetch_refs_from_bundle;
 951                ret->disconnect = close_bundle;
 952                ret->smart_options = NULL;
 953        } else if (!is_url(url)
 954                || !prefixcmp(url, "file://")
 955                || !prefixcmp(url, "git://")
 956                || !prefixcmp(url, "ssh://")
 957                || !prefixcmp(url, "git+ssh://")
 958                || !prefixcmp(url, "ssh+git://")) {
 959                /* These are builtin smart transports. */
 960                struct git_transport_data *data = xcalloc(1, sizeof(*data));
 961                ret->data = data;
 962                ret->set_option = NULL;
 963                ret->get_refs_list = get_refs_via_connect;
 964                ret->fetch = fetch_refs_via_pack;
 965                ret->push_refs = git_transport_push;
 966                ret->connect = connect_git;
 967                ret->disconnect = disconnect_git;
 968                ret->smart_options = &(data->options);
 969
 970                data->conn = NULL;
 971                data->got_remote_heads = 0;
 972        } else {
 973                /* Unknown protocol in URL. Pass to external handler. */
 974                int len = external_specification_len(url);
 975                char *handler = xmalloc(len + 1);
 976                handler[len] = 0;
 977                strncpy(handler, url, len);
 978                transport_helper_init(ret, handler);
 979        }
 980
 981        if (ret->smart_options) {
 982                ret->smart_options->thin = 1;
 983                ret->smart_options->uploadpack = "git-upload-pack";
 984                if (remote->uploadpack)
 985                        ret->smart_options->uploadpack = remote->uploadpack;
 986                ret->smart_options->receivepack = "git-receive-pack";
 987                if (remote->receivepack)
 988                        ret->smart_options->receivepack = remote->receivepack;
 989        }
 990
 991        return ret;
 992}
 993
 994int transport_set_option(struct transport *transport,
 995                         const char *name, const char *value)
 996{
 997        int git_reports = 1, protocol_reports = 1;
 998
 999        if (transport->smart_options)
1000                git_reports = set_git_option(transport->smart_options,
1001                                             name, value);
1002
1003        if (transport->set_option)
1004                protocol_reports = transport->set_option(transport, name,
1005                                                        value);
1006
1007        /* If either report is 0, report 0 (success). */
1008        if (!git_reports || !protocol_reports)
1009                return 0;
1010        /* If either reports -1 (invalid value), report -1. */
1011        if ((git_reports == -1) || (protocol_reports == -1))
1012                return -1;
1013        /* Otherwise if both report unknown, report unknown. */
1014        return 1;
1015}
1016
1017int transport_push(struct transport *transport,
1018                   int refspec_nr, const char **refspec, int flags,
1019                   int *nonfastforward)
1020{
1021        *nonfastforward = 0;
1022        verify_remote_names(refspec_nr, refspec);
1023
1024        if (transport->push) {
1025                /* Maybe FIXME. But no important transport uses this case. */
1026                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1027                        die("This transport does not support using --set-upstream");
1028
1029                return transport->push(transport, refspec_nr, refspec, flags);
1030        } else if (transport->push_refs) {
1031                struct ref *remote_refs =
1032                        transport->get_refs_list(transport, 1);
1033                struct ref *local_refs = get_local_heads();
1034                int match_flags = MATCH_REFS_NONE;
1035                int verbose = flags & TRANSPORT_PUSH_VERBOSE;
1036                int quiet = flags & TRANSPORT_PUSH_QUIET;
1037                int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
1038                int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
1039                int ret, err;
1040
1041                if (flags & TRANSPORT_PUSH_ALL)
1042                        match_flags |= MATCH_REFS_ALL;
1043                if (flags & TRANSPORT_PUSH_MIRROR)
1044                        match_flags |= MATCH_REFS_MIRROR;
1045
1046                if (match_refs(local_refs, &remote_refs,
1047                               refspec_nr, refspec, match_flags)) {
1048                        return -1;
1049                }
1050
1051                set_ref_status_for_push(remote_refs,
1052                        flags & TRANSPORT_PUSH_MIRROR,
1053                        flags & TRANSPORT_PUSH_FORCE);
1054
1055                ret = transport->push_refs(transport, remote_refs, flags);
1056                err = push_had_errors(remote_refs);
1057
1058                ret |= err;
1059
1060                if (!quiet || err)
1061                        print_push_status(transport->url, remote_refs,
1062                                        verbose | porcelain, porcelain,
1063                                        nonfastforward);
1064
1065                if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
1066                        set_upstreams(transport, remote_refs, pretend);
1067
1068                if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
1069                        struct ref *ref;
1070                        for (ref = remote_refs; ref; ref = ref->next)
1071                                update_tracking_ref(transport->remote, ref, verbose);
1072                }
1073
1074                if (!quiet && !ret && !refs_pushed(remote_refs))
1075                        fprintf(stderr, "Everything up-to-date\n");
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}