builtin/remote.c

   1 #include "builtin.h"
   2 #include "parse-options.h"
   3 #include "transport.h"
   4 #include "remote.h"
   5 #include "string-list.h"
   6 #include "strbuf.h"
   7 #include "run-command.h"
   8 #include "refs.h"
   9 #include "argv-array.h"
  10
  11 static const char * const builtin_remote_usage[] = {
  12         N_("git remote [-v | --verbose]"),
  13         N_("git remote add [-t <branch>] [-m <master>] [-f] [--tags|--no-tags] [--mirror=<fetch|push>] <name> <url>"),
  14         N_("git remote rename <old> <new>"),
  15         N_("git remote remove <name>"),
  16         N_("git remote set-head <name> (-a | --auto | -d | --delete |<branch>)"),
  17         N_("git remote [-v | --verbose] show [-n] <name>"),
  18         N_("git remote prune [-n | --dry-run] <name>"),
  19         N_("git remote [-v | --verbose] update [-p | --prune] [(<group> | <remote>)...]"),
  20         N_("git remote set-branches [--add] <name> <branch>..."),
  21         N_("git remote set-url [--push] <name> <newurl> [<oldurl>]"),
  22         N_("git remote set-url --add <name> <newurl>"),
  23         N_("git remote set-url --delete <name> <url>"),
  24         NULL
  25 };
  26
  27 static const char * const builtin_remote_add_usage[] = {
  28         N_("git remote add [<options>] <name> <url>"),
  29         NULL
  30 };
  31
  32 static const char * const builtin_remote_rename_usage[] = {
  33         N_("git remote rename <old> <new>"),
  34         NULL
  35 };
  36
  37 static const char * const builtin_remote_rm_usage[] = {
  38         N_("git remote remove <name>"),
  39         NULL
  40 };
  41
  42 static const char * const builtin_remote_sethead_usage[] = {
  43         N_("git remote set-head <name> (-a | --auto | -d | --delete | <branch>)"),
  44         NULL
  45 };
  46
  47 static const char * const builtin_remote_setbranches_usage[] = {
  48         N_("git remote set-branches <name> <branch>..."),
  49         N_("git remote set-branches --add <name> <branch>..."),
  50         NULL
  51 };
  52
  53 static const char * const builtin_remote_show_usage[] = {
  54         N_("git remote show [<options>] <name>"),
  55         NULL
  56 };
  57
  58 static const char * const builtin_remote_prune_usage[] = {
  59         N_("git remote prune [<options>] <name>"),
  60         NULL
  61 };
  62
  63 static const char * const builtin_remote_update_usage[] = {
  64         N_("git remote update [<options>] [<group> | <remote>]..."),
  65         NULL
  66 };
  67
  68 static const char * const builtin_remote_seturl_usage[] = {
  69         N_("git remote set-url [--push] <name> <newurl> [<oldurl>]"),
  70         N_("git remote set-url --add <name> <newurl>"),
  71         N_("git remote set-url --delete <name> <url>"),
  72         NULL
  73 };
  74
  75 #define GET_REF_STATES (1<<0)
  76 #define GET_HEAD_NAMES (1<<1)
  77 #define GET_PUSH_REF_STATES (1<<2)
  78
  79 static int verbose;
  80
  81 static int fetch_remote(const char *name)
  82 {
  83         const char *argv[] = { "fetch", name, NULL, NULL };
  84         if (verbose) {
  85                 argv[1] = "-v";
  86                 argv[2] = name;
  87         }
  88         printf_ln(_("Updating %s"), name);
  89         if (run_command_v_opt(argv, RUN_GIT_CMD))
  90                 return error(_("Could not fetch %s"), name);
  91         return 0;
  92 }
  93
  94 enum {
  95         TAGS_UNSET = 0,
  96         TAGS_DEFAULT = 1,
  97         TAGS_SET = 2
  98 };
  99
 100 #define MIRROR_NONE 0
 101 #define MIRROR_FETCH 1
 102 #define MIRROR_PUSH 2
 103 #define MIRROR_BOTH (MIRROR_FETCH|MIRROR_PUSH)
 104
 105 static int add_branch(const char *key, const char *branchname,
 106                 const char *remotename, int mirror, struct strbuf *tmp)
 107 {
 108         strbuf_reset(tmp);
 109         strbuf_addch(tmp, '+');
 110         if (mirror)
 111                 strbuf_addf(tmp, "refs/%s:refs/%s",
 112                                 branchname, branchname);
 113         else
 114                 strbuf_addf(tmp, "refs/heads/%s:refs/remotes/%s/%s",
 115                                 branchname, remotename, branchname);
 116         return git_config_set_multivar(key, tmp->buf, "^$", 0);
 117 }
 118
 119 static const char mirror_advice[] =
 120 N_("--mirror is dangerous and deprecated; please\n"
 121    "\t use --mirror=fetch or --mirror=push instead");
 122
 123 static int parse_mirror_opt(const struct option *opt, const char *arg, int not)
 124 {
 125         unsigned *mirror = opt->value;
 126         if (not)
 127                 *mirror = MIRROR_NONE;
 128         else if (!arg) {
 129                 warning("%s", _(mirror_advice));
 130                 *mirror = MIRROR_BOTH;
 131         }
 132         else if (!strcmp(arg, "fetch"))
 133                 *mirror = MIRROR_FETCH;
 134         else if (!strcmp(arg, "push"))
 135                 *mirror = MIRROR_PUSH;
 136         else
 137                 return error(_("unknown mirror argument: %s"), arg);
 138         return 0;
 139 }
 140
 141 static int add(int argc, const char **argv)
 142 {
 143         int fetch = 0, fetch_tags = TAGS_DEFAULT;
 144         unsigned mirror = MIRROR_NONE;
 145         struct string_list track = STRING_LIST_INIT_NODUP;
 146         const char *master = NULL;
 147         struct remote *remote;
 148         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
 149         const char *name, *url;
 150         int i;
 151
 152         struct option options[] = {
 153                 OPT_BOOL('f', "fetch", &fetch, N_("fetch the remote branches")),
 154                 OPT_SET_INT(0, "tags", &fetch_tags,
 155                             N_("import all tags and associated objects when fetching"),
 156                             TAGS_SET),
 157                 OPT_SET_INT(0, NULL, &fetch_tags,
 158                             N_("or do not fetch any tag at all (--no-tags)"), TAGS_UNSET),
 159                 OPT_STRING_LIST('t', "track", &track, N_("branch"),
 160                                 N_("branch(es) to track")),
 161                 OPT_STRING('m', "master", &master, N_("branch"), N_("master branch")),
 162                 { OPTION_CALLBACK, 0, "mirror", &mirror, N_("push|fetch"),
 163                         N_("set up remote as a mirror to push to or fetch from"),
 164                         PARSE_OPT_OPTARG, parse_mirror_opt },
 165                 OPT_END()
 166         };
 167
 168         argc = parse_options(argc, argv, NULL, options, builtin_remote_add_usage,
 169                              0);
 170
 171         if (argc != 2)
 172                 usage_with_options(builtin_remote_add_usage, options);
 173
 174         if (mirror && master)
 175                 die(_("specifying a master branch makes no sense with --mirror"));
 176         if (mirror && !(mirror & MIRROR_FETCH) && track.nr)
 177                 die(_("specifying branches to track makes sense only with fetch mirrors"));
 178
 179         name = argv[0];
 180         url = argv[1];
 181
 182         remote = remote_get(name);
 183         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
 184                         remote->fetch_refspec_nr))
 185                 die(_("remote %s already exists."), name);
 186
 187         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
 188         if (!valid_fetch_refspec(buf2.buf))
 189                 die(_("'%s' is not a valid remote name"), name);
 190
 191         strbuf_addf(&buf, "remote.%s.url", name);
 192         if (git_config_set(buf.buf, url))
 193                 return 1;
 194
 195         if (!mirror || mirror & MIRROR_FETCH) {
 196                 strbuf_reset(&buf);
 197                 strbuf_addf(&buf, "remote.%s.fetch", name);
 198                 if (track.nr == 0)
 199                         string_list_append(&track, "*");
 200                 for (i = 0; i < track.nr; i++) {
 201                         if (add_branch(buf.buf, track.items[i].string,
 202                                        name, mirror, &buf2))
 203                                 return 1;
 204                 }
 205         }
 206
 207         if (mirror & MIRROR_PUSH) {
 208                 strbuf_reset(&buf);
 209                 strbuf_addf(&buf, "remote.%s.mirror", name);
 210                 if (git_config_set(buf.buf, "true"))
 211                         return 1;
 212         }
 213
 214         if (fetch_tags != TAGS_DEFAULT) {
 215                 strbuf_reset(&buf);
 216                 strbuf_addf(&buf, "remote.%s.tagopt", name);
 217                 if (git_config_set(buf.buf,
 218                         fetch_tags == TAGS_SET ? "--tags" : "--no-tags"))
 219                         return 1;
 220         }
 221
 222         if (fetch && fetch_remote(name))
 223                 return 1;
 224
 225         if (master) {
 226                 strbuf_reset(&buf);
 227                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 228
 229                 strbuf_reset(&buf2);
 230                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 231
 232                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 233                         return error(_("Could not setup master '%s'"), master);
 234         }
 235
 236         strbuf_release(&buf);
 237         strbuf_release(&buf2);
 238         string_list_clear(&track, 0);
 239
 240         return 0;
 241 }
 242
 243 struct branch_info {
 244         char *remote_name;
 245         struct string_list merge;
 246         int rebase;
 247 };
 248
 249 static struct string_list branch_list;
 250
 251 static const char *abbrev_ref(const char *name, const char *prefix)
 252 {
 253         skip_prefix(name, prefix, &name);
 254         return name;
 255 }
 256 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 257
 258 static int config_read_branches(const char *key, const char *value, void *cb)
 259 {
 260         if (starts_with(key, "branch.")) {
 261                 const char *orig_key = key;
 262                 char *name;
 263                 struct string_list_item *item;
 264                 struct branch_info *info;
 265                 enum { REMOTE, MERGE, REBASE } type;
 266                 size_t key_len;
 267
 268                 key += 7;
 269                 if (strip_suffix(key, ".remote", &key_len)) {
 270                         name = xmemdupz(key, key_len);
 271                         type = REMOTE;
 272                 } else if (strip_suffix(key, ".merge", &key_len)) {
 273                         name = xmemdupz(key, key_len);
 274                         type = MERGE;
 275                 } else if (strip_suffix(key, ".rebase", &key_len)) {
 276                         name = xmemdupz(key, key_len);
 277                         type = REBASE;
 278                 } else
 279                         return 0;
 280
 281                 item = string_list_insert(&branch_list, name);
 282
 283                 if (!item->util)
 284                         item->util = xcalloc(1, sizeof(struct branch_info));
 285                 info = item->util;
 286                 if (type == REMOTE) {
 287                         if (info->remote_name)
 288                                 warning(_("more than one %s"), orig_key);
 289                         info->remote_name = xstrdup(value);
 290                 } else if (type == MERGE) {
 291                         char *space = strchr(value, ' ');
 292                         value = abbrev_branch(value);
 293                         while (space) {
 294                                 char *merge;
 295                                 merge = xstrndup(value, space - value);
 296                                 string_list_append(&info->merge, merge);
 297                                 value = abbrev_branch(space + 1);
 298                                 space = strchr(value, ' ');
 299                         }
 300                         string_list_append(&info->merge, xstrdup(value));
 301                 } else {
 302                         int v = git_config_maybe_bool(orig_key, value);
 303                         if (v >= 0)
 304                                 info->rebase = v;
 305                         else if (!strcmp(value, "preserve"))
 306                                 info->rebase = 1;
 307                 }
 308         }
 309         return 0;
 310 }
 311
 312 static void read_branches(void)
 313 {
 314         if (branch_list.nr)
 315                 return;
 316         git_config(config_read_branches, NULL);
 317 }
 318
 319 struct ref_states {
 320         struct remote *remote;
 321         struct string_list new, stale, tracked, heads, push;
 322         int queried;
 323 };
 324
 325 static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
 326 {
 327         struct ref *fetch_map = NULL, **tail = &fetch_map;
 328         struct ref *ref, *stale_refs;
 329         int i;
 330
 331         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 332                 if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 333                         die(_("Could not get fetch map for refspec %s"),
 334                                 states->remote->fetch_refspec[i]);
 335
 336         states->new.strdup_strings = 1;
 337         states->tracked.strdup_strings = 1;
 338         states->stale.strdup_strings = 1;
 339         for (ref = fetch_map; ref; ref = ref->next) {
 340                 if (!ref->peer_ref || !ref_exists(ref->peer_ref->name))
 341                         string_list_append(&states->new, abbrev_branch(ref->name));
 342                 else
 343                         string_list_append(&states->tracked, abbrev_branch(ref->name));
 344         }
 345         stale_refs = get_stale_heads(states->remote->fetch,
 346                                      states->remote->fetch_refspec_nr, fetch_map);
 347         for (ref = stale_refs; ref; ref = ref->next) {
 348                 struct string_list_item *item =
 349                         string_list_append(&states->stale, abbrev_branch(ref->name));
 350                 item->util = xstrdup(ref->name);
 351         }
 352         free_refs(stale_refs);
 353         free_refs(fetch_map);
 354
 355         sort_string_list(&states->new);
 356         sort_string_list(&states->tracked);
 357         sort_string_list(&states->stale);
 358
 359         return 0;
 360 }
 361
 362 struct push_info {
 363         char *dest;
 364         int forced;
 365         enum {
 366                 PUSH_STATUS_CREATE = 0,
 367                 PUSH_STATUS_DELETE,
 368                 PUSH_STATUS_UPTODATE,
 369                 PUSH_STATUS_FASTFORWARD,
 370                 PUSH_STATUS_OUTOFDATE,
 371                 PUSH_STATUS_NOTQUERIED
 372         } status;
 373 };
 374
 375 static int get_push_ref_states(const struct ref *remote_refs,
 376         struct ref_states *states)
 377 {
 378         struct remote *remote = states->remote;
 379         struct ref *ref, *local_refs, *push_map;
 380         if (remote->mirror)
 381                 return 0;
 382
 383         local_refs = get_local_heads();
 384         push_map = copy_ref_list(remote_refs);
 385
 386         match_push_refs(local_refs, &push_map, remote->push_refspec_nr,
 387                         remote->push_refspec, MATCH_REFS_NONE);
 388
 389         states->push.strdup_strings = 1;
 390         for (ref = push_map; ref; ref = ref->next) {
 391                 struct string_list_item *item;
 392                 struct push_info *info;
 393
 394                 if (!ref->peer_ref)
 395                         continue;
 396                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 397
 398                 item = string_list_append(&states->push,
 399                                           abbrev_branch(ref->peer_ref->name));
 400                 item->util = xcalloc(1, sizeof(struct push_info));
 401                 info = item->util;
 402                 info->forced = ref->force;
 403                 info->dest = xstrdup(abbrev_branch(ref->name));
 404
 405                 if (is_null_sha1(ref->new_sha1)) {
 406                         info->status = PUSH_STATUS_DELETE;
 407                 } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 408                         info->status = PUSH_STATUS_UPTODATE;
 409                 else if (is_null_sha1(ref->old_sha1))
 410                         info->status = PUSH_STATUS_CREATE;
 411                 else if (has_sha1_file(ref->old_sha1) &&
 412                          ref_newer(ref->new_sha1, ref->old_sha1))
 413                         info->status = PUSH_STATUS_FASTFORWARD;
 414                 else
 415                         info->status = PUSH_STATUS_OUTOFDATE;
 416         }
 417         free_refs(local_refs);
 418         free_refs(push_map);
 419         return 0;
 420 }
 421
 422 static int get_push_ref_states_noquery(struct ref_states *states)
 423 {
 424         int i;
 425         struct remote *remote = states->remote;
 426         struct string_list_item *item;
 427         struct push_info *info;
 428
 429         if (remote->mirror)
 430                 return 0;
 431
 432         states->push.strdup_strings = 1;
 433         if (!remote->push_refspec_nr) {
 434                 item = string_list_append(&states->push, _("(matching)"));
 435                 info = item->util = xcalloc(1, sizeof(struct push_info));
 436                 info->status = PUSH_STATUS_NOTQUERIED;
 437                 info->dest = xstrdup(item->string);
 438         }
 439         for (i = 0; i < remote->push_refspec_nr; i++) {
 440                 struct refspec *spec = remote->push + i;
 441                 if (spec->matching)
 442                         item = string_list_append(&states->push, _("(matching)"));
 443                 else if (strlen(spec->src))
 444                         item = string_list_append(&states->push, spec->src);
 445                 else
 446                         item = string_list_append(&states->push, _("(delete)"));
 447
 448                 info = item->util = xcalloc(1, sizeof(struct push_info));
 449                 info->forced = spec->force;
 450                 info->status = PUSH_STATUS_NOTQUERIED;
 451                 info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 452         }
 453         return 0;
 454 }
 455
 456 static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 457 {
 458         struct ref *ref, *matches;
 459         struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 460         struct refspec refspec;
 461
 462         refspec.force = 0;
 463         refspec.pattern = 1;
 464         refspec.src = refspec.dst = "refs/heads/*";
 465         states->heads.strdup_strings = 1;
 466         get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 467         matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 468                                     fetch_map, 1);
 469         for (ref = matches; ref; ref = ref->next)
 470                 string_list_append(&states->heads, abbrev_branch(ref->name));
 471
 472         free_refs(fetch_map);
 473         free_refs(matches);
 474
 475         return 0;
 476 }
 477
 478 struct known_remote {
 479         struct known_remote *next;
 480         struct remote *remote;
 481 };
 482
 483 struct known_remotes {
 484         struct remote *to_delete;
 485         struct known_remote *list;
 486 };
 487
 488 static int add_known_remote(struct remote *remote, void *cb_data)
 489 {
 490         struct known_remotes *all = cb_data;
 491         struct known_remote *r;
 492
 493         if (!strcmp(all->to_delete->name, remote->name))
 494                 return 0;
 495
 496         r = xmalloc(sizeof(*r));
 497         r->remote = remote;
 498         r->next = all->list;
 499         all->list = r;
 500         return 0;
 501 }
 502
 503 struct branches_for_remote {
 504         struct remote *remote;
 505         struct string_list *branches, *skipped;
 506         struct known_remotes *keep;
 507 };
 508
 509 static int add_branch_for_removal(const char *refname,
 510         const unsigned char *sha1, int flags, void *cb_data)
 511 {
 512         struct branches_for_remote *branches = cb_data;
 513         struct refspec refspec;
 514         struct string_list_item *item;
 515         struct known_remote *kr;
 516
 517         memset(&refspec, 0, sizeof(refspec));
 518         refspec.dst = (char *)refname;
 519         if (remote_find_tracking(branches->remote, &refspec))
 520                 return 0;
 521
 522         /* don't delete a branch if another remote also uses it */
 523         for (kr = branches->keep->list; kr; kr = kr->next) {
 524                 memset(&refspec, 0, sizeof(refspec));
 525                 refspec.dst = (char *)refname;
 526                 if (!remote_find_tracking(kr->remote, &refspec))
 527                         return 0;
 528         }
 529
 530         /* don't delete non-remote-tracking refs */
 531         if (!starts_with(refname, "refs/remotes/")) {
 532                 /* advise user how to delete local branches */
 533                 if (starts_with(refname, "refs/heads/"))
 534                         string_list_append(branches->skipped,
 535                                            abbrev_branch(refname));
 536                 /* silently skip over other non-remote refs */
 537                 return 0;
 538         }
 539
 540         /* make sure that symrefs are deleted */
 541         if (flags & REF_ISSYMREF)
 542                 return unlink(git_path("%s", refname));
 543
 544         item = string_list_append(branches->branches, refname);
 545         item->util = xmalloc(20);
 546         hashcpy(item->util, sha1);
 547
 548         return 0;
 549 }
 550
 551 struct rename_info {
 552         const char *old;
 553         const char *new;
 554         struct string_list *remote_branches;
 555 };
 556
 557 static int read_remote_branches(const char *refname,
 558         const unsigned char *sha1, int flags, void *cb_data)
 559 {
 560         struct rename_info *rename = cb_data;
 561         struct strbuf buf = STRBUF_INIT;
 562         struct string_list_item *item;
 563         int flag;
 564         unsigned char orig_sha1[20];
 565         const char *symref;
 566
 567         strbuf_addf(&buf, "refs/remotes/%s/", rename->old);
 568         if (starts_with(refname, buf.buf)) {
 569                 item = string_list_append(rename->remote_branches, xstrdup(refname));
 570                 symref = resolve_ref_unsafe(refname, orig_sha1, 1, &flag);
 571                 if (flag & REF_ISSYMREF)
 572                         item->util = xstrdup(symref);
 573                 else
 574                         item->util = NULL;
 575         }
 576
 577         return 0;
 578 }
 579
 580 static int migrate_file(struct remote *remote)
 581 {
 582         struct strbuf buf = STRBUF_INIT;
 583         int i;
 584         char *path = NULL;
 585
 586         strbuf_addf(&buf, "remote.%s.url", remote->name);
 587         for (i = 0; i < remote->url_nr; i++)
 588                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 589                         return error(_("Could not append '%s' to '%s'"),
 590                                         remote->url[i], buf.buf);
 591         strbuf_reset(&buf);
 592         strbuf_addf(&buf, "remote.%s.push", remote->name);
 593         for (i = 0; i < remote->push_refspec_nr; i++)
 594                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 595                         return error(_("Could not append '%s' to '%s'"),
 596                                         remote->push_refspec[i], buf.buf);
 597         strbuf_reset(&buf);
 598         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 599         for (i = 0; i < remote->fetch_refspec_nr; i++)
 600                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 601                         return error(_("Could not append '%s' to '%s'"),
 602                                         remote->fetch_refspec[i], buf.buf);
 603         if (remote->origin == REMOTE_REMOTES)
 604                 path = git_path("remotes/%s", remote->name);
 605         else if (remote->origin == REMOTE_BRANCHES)
 606                 path = git_path("branches/%s", remote->name);
 607         if (path)
 608                 unlink_or_warn(path);
 609         return 0;
 610 }
 611
 612 static int mv(int argc, const char **argv)
 613 {
 614         struct option options[] = {
 615                 OPT_END()
 616         };
 617         struct remote *oldremote, *newremote;
 618         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT,
 619                 old_remote_context = STRBUF_INIT;
 620         struct string_list remote_branches = STRING_LIST_INIT_NODUP;
 621         struct rename_info rename;
 622         int i, refspec_updated = 0;
 623
 624         if (argc != 3)
 625                 usage_with_options(builtin_remote_rename_usage, options);
 626
 627         rename.old = argv[1];
 628         rename.new = argv[2];
 629         rename.remote_branches = &remote_branches;
 630
 631         oldremote = remote_get(rename.old);
 632         if (!oldremote)
 633                 die(_("No such remote: %s"), rename.old);
 634
 635         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 636                 return migrate_file(oldremote);
 637
 638         newremote = remote_get(rename.new);
 639         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 640                 die(_("remote %s already exists."), rename.new);
 641
 642         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 643         if (!valid_fetch_refspec(buf.buf))
 644                 die(_("'%s' is not a valid remote name"), rename.new);
 645
 646         strbuf_reset(&buf);
 647         strbuf_addf(&buf, "remote.%s", rename.old);
 648         strbuf_addf(&buf2, "remote.%s", rename.new);
 649         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 650                 return error(_("Could not rename config section '%s' to '%s'"),
 651                                 buf.buf, buf2.buf);
 652
 653         strbuf_reset(&buf);
 654         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 655         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 656                 return error(_("Could not remove config section '%s'"), buf.buf);
 657         strbuf_addf(&old_remote_context, ":refs/remotes/%s/", rename.old);
 658         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 659                 char *ptr;
 660
 661                 strbuf_reset(&buf2);
 662                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 663                 ptr = strstr(buf2.buf, old_remote_context.buf);
 664                 if (ptr) {
 665                         refspec_updated = 1;
 666                         strbuf_splice(&buf2,
 667                                       ptr-buf2.buf + strlen(":refs/remotes/"),
 668                                       strlen(rename.old), rename.new,
 669                                       strlen(rename.new));
 670                 } else
 671                         warning(_("Not updating non-default fetch refspec\n"
 672                                   "\t%s\n"
 673                                   "\tPlease update the configuration manually if necessary."),
 674                                 buf2.buf);
 675
 676                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 677                         return error(_("Could not append '%s'"), buf.buf);
 678         }
 679
 680         read_branches();
 681         for (i = 0; i < branch_list.nr; i++) {
 682                 struct string_list_item *item = branch_list.items + i;
 683                 struct branch_info *info = item->util;
 684                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 685                         strbuf_reset(&buf);
 686                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 687                         if (git_config_set(buf.buf, rename.new)) {
 688                                 return error(_("Could not set '%s'"), buf.buf);
 689                         }
 690                 }
 691         }
 692
 693         if (!refspec_updated)
 694                 return 0;
 695
 696         /*
 697          * First remove symrefs, then rename the rest, finally create
 698          * the new symrefs.
 699          */
 700         for_each_ref(read_remote_branches, &rename);
 701         for (i = 0; i < remote_branches.nr; i++) {
 702                 struct string_list_item *item = remote_branches.items + i;
 703                 int flag = 0;
 704                 unsigned char sha1[20];
 705
 706                 read_ref_full(item->string, sha1, 1, &flag);
 707                 if (!(flag & REF_ISSYMREF))
 708                         continue;
 709                 if (delete_ref(item->string, NULL, REF_NODEREF))
 710                         die(_("deleting '%s' failed"), item->string);
 711         }
 712         for (i = 0; i < remote_branches.nr; i++) {
 713                 struct string_list_item *item = remote_branches.items + i;
 714
 715                 if (item->util)
 716                         continue;
 717                 strbuf_reset(&buf);
 718                 strbuf_addstr(&buf, item->string);
 719                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 720                                 rename.new, strlen(rename.new));
 721                 strbuf_reset(&buf2);
 722                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 723                                 item->string, buf.buf);
 724                 if (rename_ref(item->string, buf.buf, buf2.buf))
 725                         die(_("renaming '%s' failed"), item->string);
 726         }
 727         for (i = 0; i < remote_branches.nr; i++) {
 728                 struct string_list_item *item = remote_branches.items + i;
 729
 730                 if (!item->util)
 731                         continue;
 732                 strbuf_reset(&buf);
 733                 strbuf_addstr(&buf, item->string);
 734                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 735                                 rename.new, strlen(rename.new));
 736                 strbuf_reset(&buf2);
 737                 strbuf_addstr(&buf2, item->util);
 738                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 739                                 rename.new, strlen(rename.new));
 740                 strbuf_reset(&buf3);
 741                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 742                                 item->string, buf.buf);
 743                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 744                         die(_("creating '%s' failed"), buf.buf);
 745         }
 746         return 0;
 747 }
 748
 749 static int remove_branches(struct string_list *branches)
 750 {
 751         const char **branch_names;
 752         int i, result = 0;
 753
 754         branch_names = xmalloc(branches->nr * sizeof(*branch_names));
 755         for (i = 0; i < branches->nr; i++)
 756                 branch_names[i] = branches->items[i].string;
 757         result |= repack_without_refs(branch_names, branches->nr, NULL);
 758         free(branch_names);
 759
 760         for (i = 0; i < branches->nr; i++) {
 761                 struct string_list_item *item = branches->items + i;
 762                 const char *refname = item->string;
 763
 764                 if (delete_ref(refname, NULL, 0))
 765                         result |= error(_("Could not remove branch %s"), refname);
 766         }
 767
 768         return result;
 769 }
 770
 771 static int rm(int argc, const char **argv)
 772 {
 773         struct option options[] = {
 774                 OPT_END()
 775         };
 776         struct remote *remote;
 777         struct strbuf buf = STRBUF_INIT;
 778         struct known_remotes known_remotes = { NULL, NULL };
 779         struct string_list branches = STRING_LIST_INIT_DUP;
 780         struct string_list skipped = STRING_LIST_INIT_DUP;
 781         struct branches_for_remote cb_data;
 782         int i, result;
 783
 784         memset(&cb_data, 0, sizeof(cb_data));
 785         cb_data.branches = &branches;
 786         cb_data.skipped = &skipped;
 787         cb_data.keep = &known_remotes;
 788
 789         if (argc != 2)
 790                 usage_with_options(builtin_remote_rm_usage, options);
 791
 792         remote = remote_get(argv[1]);
 793         if (!remote)
 794                 die(_("No such remote: %s"), argv[1]);
 795
 796         known_remotes.to_delete = remote;
 797         for_each_remote(add_known_remote, &known_remotes);
 798
 799         read_branches();
 800         for (i = 0; i < branch_list.nr; i++) {
 801                 struct string_list_item *item = branch_list.items + i;
 802                 struct branch_info *info = item->util;
 803                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 804                         const char *keys[] = { "remote", "merge", NULL }, **k;
 805                         for (k = keys; *k; k++) {
 806                                 strbuf_reset(&buf);
 807                                 strbuf_addf(&buf, "branch.%s.%s",
 808                                                 item->string, *k);
 809                                 if (git_config_set(buf.buf, NULL)) {
 810                                         strbuf_release(&buf);
 811                                         return -1;
 812                                 }
 813                         }
 814                 }
 815         }
 816
 817         /*
 818          * We cannot just pass a function to for_each_ref() which deletes
 819          * the branches one by one, since for_each_ref() relies on cached
 820          * refs, which are invalidated when deleting a branch.
 821          */
 822         cb_data.remote = remote;
 823         result = for_each_ref(add_branch_for_removal, &cb_data);
 824         strbuf_release(&buf);
 825
 826         if (!result)
 827                 result = remove_branches(&branches);
 828         string_list_clear(&branches, 1);
 829
 830         if (skipped.nr) {
 831                 fprintf_ln(stderr,
 832                            Q_("Note: A branch outside the refs/remotes/ hierarchy was not removed;\n"
 833                               "to delete it, use:",
 834                               "Note: Some branches outside the refs/remotes/ hierarchy were not removed;\n"
 835                               "to delete them, use:",
 836                               skipped.nr));
 837                 for (i = 0; i < skipped.nr; i++)
 838                         fprintf(stderr, "  git branch -d %s\n",
 839                                 skipped.items[i].string);
 840         }
 841         string_list_clear(&skipped, 0);
 842
 843         if (!result) {
 844                 strbuf_addf(&buf, "remote.%s", remote->name);
 845                 if (git_config_rename_section(buf.buf, NULL) < 1)
 846                         return error(_("Could not remove config section '%s'"), buf.buf);
 847         }
 848
 849         return result;
 850 }
 851
 852 static void clear_push_info(void *util, const char *string)
 853 {
 854         struct push_info *info = util;
 855         free(info->dest);
 856         free(info);
 857 }
 858
 859 static void free_remote_ref_states(struct ref_states *states)
 860 {
 861         string_list_clear(&states->new, 0);
 862         string_list_clear(&states->stale, 1);
 863         string_list_clear(&states->tracked, 0);
 864         string_list_clear(&states->heads, 0);
 865         string_list_clear_func(&states->push, clear_push_info);
 866 }
 867
 868 static int append_ref_to_tracked_list(const char *refname,
 869         const unsigned char *sha1, int flags, void *cb_data)
 870 {
 871         struct ref_states *states = cb_data;
 872         struct refspec refspec;
 873
 874         if (flags & REF_ISSYMREF)
 875                 return 0;
 876
 877         memset(&refspec, 0, sizeof(refspec));
 878         refspec.dst = (char *)refname;
 879         if (!remote_find_tracking(states->remote, &refspec))
 880                 string_list_append(&states->tracked, abbrev_branch(refspec.src));
 881
 882         return 0;
 883 }
 884
 885 static int get_remote_ref_states(const char *name,
 886                                  struct ref_states *states,
 887                                  int query)
 888 {
 889         struct transport *transport;
 890         const struct ref *remote_refs;
 891
 892         states->remote = remote_get(name);
 893         if (!states->remote)
 894                 return error(_("No such remote: %s"), name);
 895
 896         read_branches();
 897
 898         if (query) {
 899                 transport = transport_get(states->remote, states->remote->url_nr > 0 ?
 900                         states->remote->url[0] : NULL);
 901                 remote_refs = transport_get_remote_refs(transport);
 902                 transport_disconnect(transport);
 903
 904                 states->queried = 1;
 905                 if (query & GET_REF_STATES)
 906                         get_ref_states(remote_refs, states);
 907                 if (query & GET_HEAD_NAMES)
 908                         get_head_names(remote_refs, states);
 909                 if (query & GET_PUSH_REF_STATES)
 910                         get_push_ref_states(remote_refs, states);
 911         } else {
 912                 for_each_ref(append_ref_to_tracked_list, states);
 913                 sort_string_list(&states->tracked);
 914                 get_push_ref_states_noquery(states);
 915         }
 916
 917         return 0;
 918 }
 919
 920 struct show_info {
 921         struct string_list *list;
 922         struct ref_states *states;
 923         int width, width2;
 924         int any_rebase;
 925 };
 926
 927 static int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 928 {
 929         struct show_info *info = cb_data;
 930         int n = strlen(item->string);
 931         if (n > info->width)
 932                 info->width = n;
 933         string_list_insert(info->list, item->string);
 934         return 0;
 935 }
 936
 937 static int show_remote_info_item(struct string_list_item *item, void *cb_data)
 938 {
 939         struct show_info *info = cb_data;
 940         struct ref_states *states = info->states;
 941         const char *name = item->string;
 942
 943         if (states->queried) {
 944                 const char *fmt = "%s";
 945                 const char *arg = "";
 946                 if (string_list_has_string(&states->new, name)) {
 947                         fmt = _(" new (next fetch will store in remotes/%s)");
 948                         arg = states->remote->name;
 949                 } else if (string_list_has_string(&states->tracked, name))
 950                         arg = _(" tracked");
 951                 else if (string_list_has_string(&states->stale, name))
 952                         arg = _(" stale (use 'git remote prune' to remove)");
 953                 else
 954                         arg = _(" ???");
 955                 printf("    %-*s", info->width, name);
 956                 printf(fmt, arg);
 957                 printf("\n");
 958         } else
 959                 printf("    %s\n", name);
 960
 961         return 0;
 962 }
 963
 964 static int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 965 {
 966         struct show_info *show_info = cb_data;
 967         struct ref_states *states = show_info->states;
 968         struct branch_info *branch_info = branch_item->util;
 969         struct string_list_item *item;
 970         int n;
 971
 972         if (!branch_info->merge.nr || !branch_info->remote_name ||
 973             strcmp(states->remote->name, branch_info->remote_name))
 974                 return 0;
 975         if ((n = strlen(branch_item->string)) > show_info->width)
 976                 show_info->width = n;
 977         if (branch_info->rebase)
 978                 show_info->any_rebase = 1;
 979
 980         item = string_list_insert(show_info->list, branch_item->string);
 981         item->util = branch_info;
 982
 983         return 0;
 984 }
 985
 986 static int show_local_info_item(struct string_list_item *item, void *cb_data)
 987 {
 988         struct show_info *show_info = cb_data;
 989         struct branch_info *branch_info = item->util;
 990         struct string_list *merge = &branch_info->merge;
 991         const char *also;
 992         int i;
 993
 994         if (branch_info->rebase && branch_info->merge.nr > 1) {
 995                 error(_("invalid branch.%s.merge; cannot rebase onto > 1 branch"),
 996                         item->string);
 997                 return 0;
 998         }
 999
1000         printf("    %-*s ", show_info->width, item->string);
1001         if (branch_info->rebase) {
1002                 printf_ln(_("rebases onto remote %s"), merge->items[0].string);
1003                 return 0;
1004         } else if (show_info->any_rebase) {
1005                 printf_ln(_(" merges with remote %s"), merge->items[0].string);
1006                 also = _("    and with remote");
1007         } else {
1008                 printf_ln(_("merges with remote %s"), merge->items[0].string);
1009                 also = _("   and with remote");
1010         }
1011         for (i = 1; i < merge->nr; i++)
1012                 printf("    %-*s %s %s\n", show_info->width, "", also,
1013                        merge->items[i].string);
1014
1015         return 0;
1016 }
1017
1018 static int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
1019 {
1020         struct show_info *show_info = cb_data;
1021         struct push_info *push_info = push_item->util;
1022         struct string_list_item *item;
1023         int n;
1024         if ((n = strlen(push_item->string)) > show_info->width)
1025                 show_info->width = n;
1026         if ((n = strlen(push_info->dest)) > show_info->width2)
1027                 show_info->width2 = n;
1028         item = string_list_append(show_info->list, push_item->string);
1029         item->util = push_item->util;
1030         return 0;
1031 }
1032
1033 /*
1034  * Sorting comparison for a string list that has push_info
1035  * structs in its util field
1036  */
1037 static int cmp_string_with_push(const void *va, const void *vb)
1038 {
1039         const struct string_list_item *a = va;
1040         const struct string_list_item *b = vb;
1041         const struct push_info *a_push = a->util;
1042         const struct push_info *b_push = b->util;
1043         int cmp = strcmp(a->string, b->string);
1044         return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
1045 }
1046
1047 static int show_push_info_item(struct string_list_item *item, void *cb_data)
1048 {
1049         struct show_info *show_info = cb_data;
1050         struct push_info *push_info = item->util;
1051         const char *src = item->string, *status = NULL;
1052
1053         switch (push_info->status) {
1054         case PUSH_STATUS_CREATE:
1055                 status = _("create");
1056                 break;
1057         case PUSH_STATUS_DELETE:
1058                 status = _("delete");
1059                 src = _("(none)");
1060                 break;
1061         case PUSH_STATUS_UPTODATE:
1062                 status = _("up to date");
1063                 break;
1064         case PUSH_STATUS_FASTFORWARD:
1065                 status = _("fast-forwardable");
1066                 break;
1067         case PUSH_STATUS_OUTOFDATE:
1068                 status = _("local out of date");
1069                 break;
1070         case PUSH_STATUS_NOTQUERIED:
1071                 break;
1072         }
1073         if (status) {
1074                 if (push_info->forced)
1075                         printf_ln(_("    %-*s forces to %-*s (%s)"), show_info->width, src,
1076                                show_info->width2, push_info->dest, status);
1077                 else
1078                         printf_ln(_("    %-*s pushes to %-*s (%s)"), show_info->width, src,
1079                                show_info->width2, push_info->dest, status);
1080         } else {
1081                 if (push_info->forced)
1082                         printf_ln(_("    %-*s forces to %s"), show_info->width, src,
1083                                push_info->dest);
1084                 else
1085                         printf_ln(_("    %-*s pushes to %s"), show_info->width, src,
1086                                push_info->dest);
1087         }
1088         return 0;
1089 }
1090
1091 static int get_one_entry(struct remote *remote, void *priv)
1092 {
1093         struct string_list *list = priv;
1094         struct strbuf url_buf = STRBUF_INIT;
1095         const char **url;
1096         int i, url_nr;
1097
1098         if (remote->url_nr > 0) {
1099                 strbuf_addf(&url_buf, "%s (fetch)", remote->url[0]);
1100                 string_list_append(list, remote->name)->util =
1101                                 strbuf_detach(&url_buf, NULL);
1102         } else
1103                 string_list_append(list, remote->name)->util = NULL;
1104         if (remote->pushurl_nr) {
1105                 url = remote->pushurl;
1106                 url_nr = remote->pushurl_nr;
1107         } else {
1108                 url = remote->url;
1109                 url_nr = remote->url_nr;
1110         }
1111         for (i = 0; i < url_nr; i++)
1112         {
1113                 strbuf_addf(&url_buf, "%s (push)", url[i]);
1114                 string_list_append(list, remote->name)->util =
1115                                 strbuf_detach(&url_buf, NULL);
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int show_all(void)
1122 {
1123         struct string_list list = STRING_LIST_INIT_NODUP;
1124         int result;
1125
1126         list.strdup_strings = 1;
1127         result = for_each_remote(get_one_entry, &list);
1128
1129         if (!result) {
1130                 int i;
1131
1132                 sort_string_list(&list);
1133                 for (i = 0; i < list.nr; i++) {
1134                         struct string_list_item *item = list.items + i;
1135                         if (verbose)
1136                                 printf("%s\t%s\n", item->string,
1137                                         item->util ? (const char *)item->util : "");
1138                         else {
1139                                 if (i && !strcmp((item - 1)->string, item->string))
1140                                         continue;
1141                                 printf("%s\n", item->string);
1142                         }
1143                 }
1144         }
1145         string_list_clear(&list, 1);
1146         return result;
1147 }
1148
1149 static int show(int argc, const char **argv)
1150 {
1151         int no_query = 0, result = 0, query_flag = 0;
1152         struct option options[] = {
1153                 OPT_BOOL('n', NULL, &no_query, N_("do not query remotes")),
1154                 OPT_END()
1155         };
1156         struct ref_states states;
1157         struct string_list info_list = STRING_LIST_INIT_NODUP;
1158         struct show_info info;
1159
1160         argc = parse_options(argc, argv, NULL, options, builtin_remote_show_usage,
1161                              0);
1162
1163         if (argc < 1)
1164                 return show_all();
1165
1166         if (!no_query)
1167                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
1168
1169         memset(&states, 0, sizeof(states));
1170         memset(&info, 0, sizeof(info));
1171         info.states = &states;
1172         info.list = &info_list;
1173         for (; argc; argc--, argv++) {
1174                 int i;
1175                 const char **url;
1176                 int url_nr;
1177
1178                 get_remote_ref_states(*argv, &states, query_flag);
1179
1180                 printf_ln(_("* remote %s"), *argv);
1181                 printf_ln(_("  Fetch URL: %s"), states.remote->url_nr > 0 ?
1182                        states.remote->url[0] : _("(no URL)"));
1183                 if (states.remote->pushurl_nr) {
1184                         url = states.remote->pushurl;
1185                         url_nr = states.remote->pushurl_nr;
1186                 } else {
1187                         url = states.remote->url;
1188                         url_nr = states.remote->url_nr;
1189                 }
1190                 for (i = 0; i < url_nr; i++)
1191                         printf_ln(_("  Push  URL: %s"), url[i]);
1192                 if (!i)
1193                         printf_ln(_("  Push  URL: %s"), "(no URL)");
1194                 if (no_query)
1195                         printf_ln(_("  HEAD branch: %s"), "(not queried)");
1196                 else if (!states.heads.nr)
1197                         printf_ln(_("  HEAD branch: %s"), "(unknown)");
1198                 else if (states.heads.nr == 1)
1199                         printf_ln(_("  HEAD branch: %s"), states.heads.items[0].string);
1200                 else {
1201                         printf(_("  HEAD branch (remote HEAD is ambiguous,"
1202                                  " may be one of the following):\n"));
1203                         for (i = 0; i < states.heads.nr; i++)
1204                                 printf("    %s\n", states.heads.items[i].string);
1205                 }
1206
1207                 /* remote branch info */
1208                 info.width = 0;
1209                 for_each_string_list(&states.new, add_remote_to_show_info, &info);
1210                 for_each_string_list(&states.tracked, add_remote_to_show_info, &info);
1211                 for_each_string_list(&states.stale, add_remote_to_show_info, &info);
1212                 if (info.list->nr)
1213                         printf_ln(Q_("  Remote branch:%s",
1214                                      "  Remote branches:%s",
1215                                      info.list->nr),
1216                                   no_query ? _(" (status not queried)") : "");
1217                 for_each_string_list(info.list, show_remote_info_item, &info);
1218                 string_list_clear(info.list, 0);
1219
1220                 /* git pull info */
1221                 info.width = 0;
1222                 info.any_rebase = 0;
1223                 for_each_string_list(&branch_list, add_local_to_show_info, &info);
1224                 if (info.list->nr)
1225                         printf_ln(Q_("  Local branch configured for 'git pull':",
1226                                      "  Local branches configured for 'git pull':",
1227                                      info.list->nr));
1228                 for_each_string_list(info.list, show_local_info_item, &info);
1229                 string_list_clear(info.list, 0);
1230
1231                 /* git push info */
1232                 if (states.remote->mirror)
1233                         printf_ln(_("  Local refs will be mirrored by 'git push'"));
1234
1235                 info.width = info.width2 = 0;
1236                 for_each_string_list(&states.push, add_push_to_show_info, &info);
1237                 qsort(info.list->items, info.list->nr,
1238                         sizeof(*info.list->items), cmp_string_with_push);
1239                 if (info.list->nr)
1240                         printf_ln(Q_("  Local ref configured for 'git push'%s:",
1241                                      "  Local refs configured for 'git push'%s:",
1242                                      info.list->nr),
1243                                   no_query ? _(" (status not queried)") : "");
1244                 for_each_string_list(info.list, show_push_info_item, &info);
1245                 string_list_clear(info.list, 0);
1246
1247                 free_remote_ref_states(&states);
1248         }
1249
1250         return result;
1251 }
1252
1253 static int set_head(int argc, const char **argv)
1254 {
1255         int i, opt_a = 0, opt_d = 0, result = 0;
1256         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1257         char *head_name = NULL;
1258
1259         struct option options[] = {
1260                 OPT_BOOL('a', "auto", &opt_a,
1261                          N_("set refs/remotes/<name>/HEAD according to remote")),
1262                 OPT_BOOL('d', "delete", &opt_d,
1263                          N_("delete refs/remotes/<name>/HEAD")),
1264                 OPT_END()
1265         };
1266         argc = parse_options(argc, argv, NULL, options, builtin_remote_sethead_usage,
1267                              0);
1268         if (argc)
1269                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1270
1271         if (!opt_a && !opt_d && argc == 2) {
1272                 head_name = xstrdup(argv[1]);
1273         } else if (opt_a && !opt_d && argc == 1) {
1274                 struct ref_states states;
1275                 memset(&states, 0, sizeof(states));
1276                 get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1277                 if (!states.heads.nr)
1278                         result |= error(_("Cannot determine remote HEAD"));
1279                 else if (states.heads.nr > 1) {
1280                         result |= error(_("Multiple remote HEAD branches. "
1281                                           "Please choose one explicitly with:"));
1282                         for (i = 0; i < states.heads.nr; i++)
1283                                 fprintf(stderr, "  git remote set-head %s %s\n",
1284                                         argv[0], states.heads.items[i].string);
1285                 } else
1286                         head_name = xstrdup(states.heads.items[0].string);
1287                 free_remote_ref_states(&states);
1288         } else if (opt_d && !opt_a && argc == 1) {
1289                 if (delete_ref(buf.buf, NULL, REF_NODEREF))
1290                         result |= error(_("Could not delete %s"), buf.buf);
1291         } else
1292                 usage_with_options(builtin_remote_sethead_usage, options);
1293
1294         if (head_name) {
1295                 strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1296                 /* make sure it's valid */
1297                 if (!ref_exists(buf2.buf))
1298                         result |= error(_("Not a valid ref: %s"), buf2.buf);
1299                 else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1300                         result |= error(_("Could not setup %s"), buf.buf);
1301                 if (opt_a)
1302                         printf("%s/HEAD set to %s\n", argv[0], head_name);
1303                 free(head_name);
1304         }
1305
1306         strbuf_release(&buf);
1307         strbuf_release(&buf2);
1308         return result;
1309 }
1310
1311 static int prune_remote(const char *remote, int dry_run)
1312 {
1313         int result = 0, i;
1314         struct ref_states states;
1315         struct string_list delete_refs_list = STRING_LIST_INIT_NODUP;
1316         const char **delete_refs;
1317         const char *dangling_msg = dry_run
1318                 ? _(" %s will become dangling!")
1319                 : _(" %s has become dangling!");
1320
1321         memset(&states, 0, sizeof(states));
1322         get_remote_ref_states(remote, &states, GET_REF_STATES);
1323
1324         if (states.stale.nr) {
1325                 printf_ln(_("Pruning %s"), remote);
1326                 printf_ln(_("URL: %s"),
1327                        states.remote->url_nr
1328                        ? states.remote->url[0]
1329                        : _("(no URL)"));
1330
1331                 delete_refs = xmalloc(states.stale.nr * sizeof(*delete_refs));
1332                 for (i = 0; i < states.stale.nr; i++)
1333                         delete_refs[i] = states.stale.items[i].util;
1334                 if (!dry_run)
1335                         result |= repack_without_refs(delete_refs,
1336                                                       states.stale.nr, NULL);
1337                 free(delete_refs);
1338         }
1339
1340         for (i = 0; i < states.stale.nr; i++) {
1341                 const char *refname = states.stale.items[i].util;
1342
1343                 string_list_insert(&delete_refs_list, refname);
1344
1345                 if (!dry_run)
1346                         result |= delete_ref(refname, NULL, 0);
1347
1348                 if (dry_run)
1349                         printf_ln(_(" * [would prune] %s"),
1350                                abbrev_ref(refname, "refs/remotes/"));
1351                 else
1352                         printf_ln(_(" * [pruned] %s"),
1353                                abbrev_ref(refname, "refs/remotes/"));
1354         }
1355
1356         warn_dangling_symrefs(stdout, dangling_msg, &delete_refs_list);
1357         string_list_clear(&delete_refs_list, 0);
1358
1359         free_remote_ref_states(&states);
1360         return result;
1361 }
1362
1363 static int prune(int argc, const char **argv)
1364 {
1365         int dry_run = 0, result = 0;
1366         struct option options[] = {
1367                 OPT__DRY_RUN(&dry_run, N_("dry run")),
1368                 OPT_END()
1369         };
1370
1371         argc = parse_options(argc, argv, NULL, options, builtin_remote_prune_usage,
1372                              0);
1373
1374         if (argc < 1)
1375                 usage_with_options(builtin_remote_prune_usage, options);
1376
1377         for (; argc; argc--, argv++)
1378                 result |= prune_remote(*argv, dry_run);
1379
1380         return result;
1381 }
1382
1383 static int get_remote_default(const char *key, const char *value, void *priv)
1384 {
1385         if (strcmp(key, "remotes.default") == 0) {
1386                 int *found = priv;
1387                 *found = 1;
1388         }
1389         return 0;
1390 }
1391
1392 static int update(int argc, const char **argv)
1393 {
1394         int i, prune = -1;
1395         struct option options[] = {
1396                 OPT_BOOL('p', "prune", &prune,
1397                          N_("prune remotes after fetching")),
1398                 OPT_END()
1399         };
1400         struct argv_array fetch_argv = ARGV_ARRAY_INIT;
1401         int default_defined = 0;
1402         int retval;
1403
1404         argc = parse_options(argc, argv, NULL, options, builtin_remote_update_usage,
1405                              PARSE_OPT_KEEP_ARGV0);
1406
1407         argv_array_push(&fetch_argv, "fetch");
1408
1409         if (prune != -1)
1410                 argv_array_push(&fetch_argv, prune ? "--prune" : "--no-prune");
1411         if (verbose)
1412                 argv_array_push(&fetch_argv, "-v");
1413         argv_array_push(&fetch_argv, "--multiple");
1414         if (argc < 2)
1415                 argv_array_push(&fetch_argv, "default");
1416         for (i = 1; i < argc; i++)
1417                 argv_array_push(&fetch_argv, argv[i]);
1418
1419         if (strcmp(fetch_argv.argv[fetch_argv.argc-1], "default") == 0) {
1420                 git_config(get_remote_default, &default_defined);
1421                 if (!default_defined) {
1422                         argv_array_pop(&fetch_argv);
1423                         argv_array_push(&fetch_argv, "--all");
1424                 }
1425         }
1426
1427         retval = run_command_v_opt(fetch_argv.argv, RUN_GIT_CMD);
1428         argv_array_clear(&fetch_argv);
1429         return retval;
1430 }
1431
1432 static int remove_all_fetch_refspecs(const char *remote, const char *key)
1433 {
1434         return git_config_set_multivar(key, NULL, NULL, 1);
1435 }
1436
1437 static int add_branches(struct remote *remote, const char **branches,
1438                         const char *key)
1439 {
1440         const char *remotename = remote->name;
1441         int mirror = remote->mirror;
1442         struct strbuf refspec = STRBUF_INIT;
1443
1444         for (; *branches; branches++)
1445                 if (add_branch(key, *branches, remotename, mirror, &refspec)) {
1446                         strbuf_release(&refspec);
1447                         return 1;
1448                 }
1449
1450         strbuf_release(&refspec);
1451         return 0;
1452 }
1453
1454 static int set_remote_branches(const char *remotename, const char **branches,
1455                                 int add_mode)
1456 {
1457         struct strbuf key = STRBUF_INIT;
1458         struct remote *remote;
1459
1460         strbuf_addf(&key, "remote.%s.fetch", remotename);
1461
1462         if (!remote_is_configured(remotename))
1463                 die(_("No such remote '%s'"), remotename);
1464         remote = remote_get(remotename);
1465
1466         if (!add_mode && remove_all_fetch_refspecs(remotename, key.buf)) {
1467                 strbuf_release(&key);
1468                 return 1;
1469         }
1470         if (add_branches(remote, branches, key.buf)) {
1471                 strbuf_release(&key);
1472                 return 1;
1473         }
1474
1475         strbuf_release(&key);
1476         return 0;
1477 }
1478
1479 static int set_branches(int argc, const char **argv)
1480 {
1481         int add_mode = 0;
1482         struct option options[] = {
1483                 OPT_BOOL('\0', "add", &add_mode, N_("add branch")),
1484                 OPT_END()
1485         };
1486
1487         argc = parse_options(argc, argv, NULL, options,
1488                              builtin_remote_setbranches_usage, 0);
1489         if (argc == 0) {
1490                 error(_("no remote specified"));
1491                 usage_with_options(builtin_remote_setbranches_usage, options);
1492         }
1493         argv[argc] = NULL;
1494
1495         return set_remote_branches(argv[0], argv + 1, add_mode);
1496 }
1497
1498 static int set_url(int argc, const char **argv)
1499 {
1500         int i, push_mode = 0, add_mode = 0, delete_mode = 0;
1501         int matches = 0, negative_matches = 0;
1502         const char *remotename = NULL;
1503         const char *newurl = NULL;
1504         const char *oldurl = NULL;
1505         struct remote *remote;
1506         regex_t old_regex;
1507         const char **urlset;
1508         int urlset_nr;
1509         struct strbuf name_buf = STRBUF_INIT;
1510         struct option options[] = {
1511                 OPT_BOOL('\0', "push", &push_mode,
1512                          N_("manipulate push URLs")),
1513                 OPT_BOOL('\0', "add", &add_mode,
1514                          N_("add URL")),
1515                 OPT_BOOL('\0', "delete", &delete_mode,
1516                             N_("delete URLs")),
1517                 OPT_END()
1518         };
1519         argc = parse_options(argc, argv, NULL, options, builtin_remote_seturl_usage,
1520                              PARSE_OPT_KEEP_ARGV0);
1521
1522         if (add_mode && delete_mode)
1523                 die(_("--add --delete doesn't make sense"));
1524
1525         if (argc < 3 || argc > 4 || ((add_mode || delete_mode) && argc != 3))
1526                 usage_with_options(builtin_remote_seturl_usage, options);
1527
1528         remotename = argv[1];
1529         newurl = argv[2];
1530         if (argc > 3)
1531                 oldurl = argv[3];
1532
1533         if (delete_mode)
1534                 oldurl = newurl;
1535
1536         if (!remote_is_configured(remotename))
1537                 die(_("No such remote '%s'"), remotename);
1538         remote = remote_get(remotename);
1539
1540         if (push_mode) {
1541                 strbuf_addf(&name_buf, "remote.%s.pushurl", remotename);
1542                 urlset = remote->pushurl;
1543                 urlset_nr = remote->pushurl_nr;
1544         } else {
1545                 strbuf_addf(&name_buf, "remote.%s.url", remotename);
1546                 urlset = remote->url;
1547                 urlset_nr = remote->url_nr;
1548         }
1549
1550         /* Special cases that add new entry. */
1551         if ((!oldurl && !delete_mode) || add_mode) {
1552                 if (add_mode)
1553                         git_config_set_multivar(name_buf.buf, newurl,
1554                                 "^$", 0);
1555                 else
1556                         git_config_set(name_buf.buf, newurl);
1557                 strbuf_release(&name_buf);
1558                 return 0;
1559         }
1560
1561         /* Old URL specified. Demand that one matches. */
1562         if (regcomp(&old_regex, oldurl, REG_EXTENDED))
1563                 die(_("Invalid old URL pattern: %s"), oldurl);
1564
1565         for (i = 0; i < urlset_nr; i++)
1566                 if (!regexec(&old_regex, urlset[i], 0, NULL, 0))
1567                         matches++;
1568                 else
1569                         negative_matches++;
1570         if (!delete_mode && !matches)
1571                 die(_("No such URL found: %s"), oldurl);
1572         if (delete_mode && !negative_matches && !push_mode)
1573                 die(_("Will not delete all non-push URLs"));
1574
1575         regfree(&old_regex);
1576
1577         if (!delete_mode)
1578                 git_config_set_multivar(name_buf.buf, newurl, oldurl, 0);
1579         else
1580                 git_config_set_multivar(name_buf.buf, NULL, oldurl, 1);
1581         return 0;
1582 }
1583
1584 int cmd_remote(int argc, const char **argv, const char *prefix)
1585 {
1586         struct option options[] = {
1587                 OPT__VERBOSE(&verbose, N_("be verbose; must be placed before a subcommand")),
1588                 OPT_END()
1589         };
1590         int result;
1591
1592         argc = parse_options(argc, argv, prefix, options, builtin_remote_usage,
1593                 PARSE_OPT_STOP_AT_NON_OPTION);
1594
1595         if (argc < 1)
1596                 result = show_all();
1597         else if (!strcmp(argv[0], "add"))
1598                 result = add(argc, argv);
1599         else if (!strcmp(argv[0], "rename"))
1600                 result = mv(argc, argv);
1601         else if (!strcmp(argv[0], "rm") || !strcmp(argv[0], "remove"))
1602                 result = rm(argc, argv);
1603         else if (!strcmp(argv[0], "set-head"))
1604                 result = set_head(argc, argv);
1605         else if (!strcmp(argv[0], "set-branches"))
1606                 result = set_branches(argc, argv);
1607         else if (!strcmp(argv[0], "set-url"))
1608                 result = set_url(argc, argv);
1609         else if (!strcmp(argv[0], "show"))
1610                 result = show(argc, argv);
1611         else if (!strcmp(argv[0], "prune"))
1612                 result = prune(argc, argv);
1613         else if (!strcmp(argv[0], "update"))
1614                 result = update(argc, argv);
1615         else {
1616                 error(_("Unknown subcommand: %s"), argv[0]);
1617                 usage_with_options(builtin_remote_usage, options);
1618         }
1619
1620         return result ? 1 : 0;
1621 }