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 ||
 184                         (strcmp(name, remote->url[0]) &&
 185                                 strcmp(url, remote->url[0])) ||
 186                         remote->fetch_refspec_nr))
 187                 die(_("remote %s already exists."), name);
 188
 189         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
 190         if (!valid_fetch_refspec(buf2.buf))
 191                 die(_("'%s' is not a valid remote name"), name);
 192
 193         strbuf_addf(&buf, "remote.%s.url", name);
 194         if (git_config_set(buf.buf, url))
 195                 return 1;
 196
 197         if (!mirror || mirror & MIRROR_FETCH) {
 198                 strbuf_reset(&buf);
 199                 strbuf_addf(&buf, "remote.%s.fetch", name);
 200                 if (track.nr == 0)
 201                         string_list_append(&track, "*");
 202                 for (i = 0; i < track.nr; i++) {
 203                         if (add_branch(buf.buf, track.items[i].string,
 204                                        name, mirror, &buf2))
 205                                 return 1;
 206                 }
 207         }
 208
 209         if (mirror & MIRROR_PUSH) {
 210                 strbuf_reset(&buf);
 211                 strbuf_addf(&buf, "remote.%s.mirror", name);
 212                 if (git_config_set(buf.buf, "true"))
 213                         return 1;
 214         }
 215
 216         if (fetch_tags != TAGS_DEFAULT) {
 217                 strbuf_reset(&buf);
 218                 strbuf_addf(&buf, "remote.%s.tagopt", name);
 219                 if (git_config_set(buf.buf,
 220                         fetch_tags == TAGS_SET ? "--tags" : "--no-tags"))
 221                         return 1;
 222         }
 223
 224         if (fetch && fetch_remote(name))
 225                 return 1;
 226
 227         if (master) {
 228                 strbuf_reset(&buf);
 229                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 230
 231                 strbuf_reset(&buf2);
 232                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 233
 234                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 235                         return error(_("Could not setup master '%s'"), master);
 236         }
 237
 238         strbuf_release(&buf);
 239         strbuf_release(&buf2);
 240         string_list_clear(&track, 0);
 241
 242         return 0;
 243 }
 244
 245 struct branch_info {
 246         char *remote_name;
 247         struct string_list merge;
 248         int rebase;
 249 };
 250
 251 static struct string_list branch_list;
 252
 253 static const char *abbrev_ref(const char *name, const char *prefix)
 254 {
 255         skip_prefix(name, prefix, &name);
 256         return name;
 257 }
 258 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 259
 260 static int config_read_branches(const char *key, const char *value, void *cb)
 261 {
 262         if (starts_with(key, "branch.")) {
 263                 const char *orig_key = key;
 264                 char *name;
 265                 struct string_list_item *item;
 266                 struct branch_info *info;
 267                 enum { REMOTE, MERGE, REBASE } type;
 268                 size_t key_len;
 269
 270                 key += 7;
 271                 if (strip_suffix(key, ".remote", &key_len)) {
 272                         name = xmemdupz(key, key_len);
 273                         type = REMOTE;
 274                 } else if (strip_suffix(key, ".merge", &key_len)) {
 275                         name = xmemdupz(key, key_len);
 276                         type = MERGE;
 277                 } else if (strip_suffix(key, ".rebase", &key_len)) {
 278                         name = xmemdupz(key, key_len);
 279                         type = REBASE;
 280                 } else
 281                         return 0;
 282
 283                 item = string_list_insert(&branch_list, name);
 284
 285                 if (!item->util)
 286                         item->util = xcalloc(1, sizeof(struct branch_info));
 287                 info = item->util;
 288                 if (type == REMOTE) {
 289                         if (info->remote_name)
 290                                 warning(_("more than one %s"), orig_key);
 291                         info->remote_name = xstrdup(value);
 292                 } else if (type == MERGE) {
 293                         char *space = strchr(value, ' ');
 294                         value = abbrev_branch(value);
 295                         while (space) {
 296                                 char *merge;
 297                                 merge = xstrndup(value, space - value);
 298                                 string_list_append(&info->merge, merge);
 299                                 value = abbrev_branch(space + 1);
 300                                 space = strchr(value, ' ');
 301                         }
 302                         string_list_append(&info->merge, xstrdup(value));
 303                 } else {
 304                         int v = git_config_maybe_bool(orig_key, value);
 305                         if (v >= 0)
 306                                 info->rebase = v;
 307                         else if (!strcmp(value, "preserve"))
 308                                 info->rebase = 1;
 309                 }
 310         }
 311         return 0;
 312 }
 313
 314 static void read_branches(void)
 315 {
 316         if (branch_list.nr)
 317                 return;
 318         git_config(config_read_branches, NULL);
 319 }
 320
 321 struct ref_states {
 322         struct remote *remote;
 323         struct string_list new, stale, tracked, heads, push;
 324         int queried;
 325 };
 326
 327 static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
 328 {
 329         struct ref *fetch_map = NULL, **tail = &fetch_map;
 330         struct ref *ref, *stale_refs;
 331         int i;
 332
 333         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 334                 if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 335                         die(_("Could not get fetch map for refspec %s"),
 336                                 states->remote->fetch_refspec[i]);
 337
 338         states->new.strdup_strings = 1;
 339         states->tracked.strdup_strings = 1;
 340         states->stale.strdup_strings = 1;
 341         for (ref = fetch_map; ref; ref = ref->next) {
 342                 if (!ref->peer_ref || !ref_exists(ref->peer_ref->name))
 343                         string_list_append(&states->new, abbrev_branch(ref->name));
 344                 else
 345                         string_list_append(&states->tracked, abbrev_branch(ref->name));
 346         }
 347         stale_refs = get_stale_heads(states->remote->fetch,
 348                                      states->remote->fetch_refspec_nr, fetch_map);
 349         for (ref = stale_refs; ref; ref = ref->next) {
 350                 struct string_list_item *item =
 351                         string_list_append(&states->stale, abbrev_branch(ref->name));
 352                 item->util = xstrdup(ref->name);
 353         }
 354         free_refs(stale_refs);
 355         free_refs(fetch_map);
 356
 357         string_list_sort(&states->new);
 358         string_list_sort(&states->tracked);
 359         string_list_sort(&states->stale);
 360
 361         return 0;
 362 }
 363
 364 struct push_info {
 365         char *dest;
 366         int forced;
 367         enum {
 368                 PUSH_STATUS_CREATE = 0,
 369                 PUSH_STATUS_DELETE,
 370                 PUSH_STATUS_UPTODATE,
 371                 PUSH_STATUS_FASTFORWARD,
 372                 PUSH_STATUS_OUTOFDATE,
 373                 PUSH_STATUS_NOTQUERIED
 374         } status;
 375 };
 376
 377 static int get_push_ref_states(const struct ref *remote_refs,
 378         struct ref_states *states)
 379 {
 380         struct remote *remote = states->remote;
 381         struct ref *ref, *local_refs, *push_map;
 382         if (remote->mirror)
 383                 return 0;
 384
 385         local_refs = get_local_heads();
 386         push_map = copy_ref_list(remote_refs);
 387
 388         match_push_refs(local_refs, &push_map, remote->push_refspec_nr,
 389                         remote->push_refspec, MATCH_REFS_NONE);
 390
 391         states->push.strdup_strings = 1;
 392         for (ref = push_map; ref; ref = ref->next) {
 393                 struct string_list_item *item;
 394                 struct push_info *info;
 395
 396                 if (!ref->peer_ref)
 397                         continue;
 398                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 399
 400                 item = string_list_append(&states->push,
 401                                           abbrev_branch(ref->peer_ref->name));
 402                 item->util = xcalloc(1, sizeof(struct push_info));
 403                 info = item->util;
 404                 info->forced = ref->force;
 405                 info->dest = xstrdup(abbrev_branch(ref->name));
 406
 407                 if (is_null_sha1(ref->new_sha1)) {
 408                         info->status = PUSH_STATUS_DELETE;
 409                 } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 410                         info->status = PUSH_STATUS_UPTODATE;
 411                 else if (is_null_sha1(ref->old_sha1))
 412                         info->status = PUSH_STATUS_CREATE;
 413                 else if (has_sha1_file(ref->old_sha1) &&
 414                          ref_newer(ref->new_sha1, ref->old_sha1))
 415                         info->status = PUSH_STATUS_FASTFORWARD;
 416                 else
 417                         info->status = PUSH_STATUS_OUTOFDATE;
 418         }
 419         free_refs(local_refs);
 420         free_refs(push_map);
 421         return 0;
 422 }
 423
 424 static int get_push_ref_states_noquery(struct ref_states *states)
 425 {
 426         int i;
 427         struct remote *remote = states->remote;
 428         struct string_list_item *item;
 429         struct push_info *info;
 430
 431         if (remote->mirror)
 432                 return 0;
 433
 434         states->push.strdup_strings = 1;
 435         if (!remote->push_refspec_nr) {
 436                 item = string_list_append(&states->push, _("(matching)"));
 437                 info = item->util = xcalloc(1, sizeof(struct push_info));
 438                 info->status = PUSH_STATUS_NOTQUERIED;
 439                 info->dest = xstrdup(item->string);
 440         }
 441         for (i = 0; i < remote->push_refspec_nr; i++) {
 442                 struct refspec *spec = remote->push + i;
 443                 if (spec->matching)
 444                         item = string_list_append(&states->push, _("(matching)"));
 445                 else if (strlen(spec->src))
 446                         item = string_list_append(&states->push, spec->src);
 447                 else
 448                         item = string_list_append(&states->push, _("(delete)"));
 449
 450                 info = item->util = xcalloc(1, sizeof(struct push_info));
 451                 info->forced = spec->force;
 452                 info->status = PUSH_STATUS_NOTQUERIED;
 453                 info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 454         }
 455         return 0;
 456 }
 457
 458 static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 459 {
 460         struct ref *ref, *matches;
 461         struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 462         struct refspec refspec;
 463
 464         refspec.force = 0;
 465         refspec.pattern = 1;
 466         refspec.src = refspec.dst = "refs/heads/*";
 467         states->heads.strdup_strings = 1;
 468         get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 469         matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 470                                     fetch_map, 1);
 471         for (ref = matches; ref; ref = ref->next)
 472                 string_list_append(&states->heads, abbrev_branch(ref->name));
 473
 474         free_refs(fetch_map);
 475         free_refs(matches);
 476
 477         return 0;
 478 }
 479
 480 struct known_remote {
 481         struct known_remote *next;
 482         struct remote *remote;
 483 };
 484
 485 struct known_remotes {
 486         struct remote *to_delete;
 487         struct known_remote *list;
 488 };
 489
 490 static int add_known_remote(struct remote *remote, void *cb_data)
 491 {
 492         struct known_remotes *all = cb_data;
 493         struct known_remote *r;
 494
 495         if (!strcmp(all->to_delete->name, remote->name))
 496                 return 0;
 497
 498         r = xmalloc(sizeof(*r));
 499         r->remote = remote;
 500         r->next = all->list;
 501         all->list = r;
 502         return 0;
 503 }
 504
 505 struct branches_for_remote {
 506         struct remote *remote;
 507         struct string_list *branches, *skipped;
 508         struct known_remotes *keep;
 509 };
 510
 511 static int add_branch_for_removal(const char *refname,
 512         const unsigned char *sha1, int flags, void *cb_data)
 513 {
 514         struct branches_for_remote *branches = cb_data;
 515         struct refspec refspec;
 516         struct string_list_item *item;
 517         struct known_remote *kr;
 518
 519         memset(&refspec, 0, sizeof(refspec));
 520         refspec.dst = (char *)refname;
 521         if (remote_find_tracking(branches->remote, &refspec))
 522                 return 0;
 523
 524         /* don't delete a branch if another remote also uses it */
 525         for (kr = branches->keep->list; kr; kr = kr->next) {
 526                 memset(&refspec, 0, sizeof(refspec));
 527                 refspec.dst = (char *)refname;
 528                 if (!remote_find_tracking(kr->remote, &refspec))
 529                         return 0;
 530         }
 531
 532         /* don't delete non-remote-tracking refs */
 533         if (!starts_with(refname, "refs/remotes/")) {
 534                 /* advise user how to delete local branches */
 535                 if (starts_with(refname, "refs/heads/"))
 536                         string_list_append(branches->skipped,
 537                                            abbrev_branch(refname));
 538                 /* silently skip over other non-remote refs */
 539                 return 0;
 540         }
 541
 542         /* make sure that symrefs are deleted */
 543         if (flags & REF_ISSYMREF)
 544                 return unlink(git_path("%s", refname));
 545
 546         item = string_list_append(branches->branches, refname);
 547         item->util = xmalloc(20);
 548         hashcpy(item->util, sha1);
 549
 550         return 0;
 551 }
 552
 553 struct rename_info {
 554         const char *old;
 555         const char *new;
 556         struct string_list *remote_branches;
 557 };
 558
 559 static int read_remote_branches(const char *refname,
 560         const unsigned char *sha1, int flags, void *cb_data)
 561 {
 562         struct rename_info *rename = cb_data;
 563         struct strbuf buf = STRBUF_INIT;
 564         struct string_list_item *item;
 565         int flag;
 566         unsigned char orig_sha1[20];
 567         const char *symref;
 568
 569         strbuf_addf(&buf, "refs/remotes/%s/", rename->old);
 570         if (starts_with(refname, buf.buf)) {
 571                 item = string_list_append(rename->remote_branches, xstrdup(refname));
 572                 symref = resolve_ref_unsafe(refname, RESOLVE_REF_READING,
 573                                             orig_sha1, &flag);
 574                 if (flag & REF_ISSYMREF)
 575                         item->util = xstrdup(symref);
 576                 else
 577                         item->util = NULL;
 578         }
 579
 580         return 0;
 581 }
 582
 583 static int migrate_file(struct remote *remote)
 584 {
 585         struct strbuf buf = STRBUF_INIT;
 586         int i;
 587         char *path = NULL;
 588
 589         strbuf_addf(&buf, "remote.%s.url", remote->name);
 590         for (i = 0; i < remote->url_nr; i++)
 591                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 592                         return error(_("Could not append '%s' to '%s'"),
 593                                         remote->url[i], buf.buf);
 594         strbuf_reset(&buf);
 595         strbuf_addf(&buf, "remote.%s.push", remote->name);
 596         for (i = 0; i < remote->push_refspec_nr; i++)
 597                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 598                         return error(_("Could not append '%s' to '%s'"),
 599                                         remote->push_refspec[i], buf.buf);
 600         strbuf_reset(&buf);
 601         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 602         for (i = 0; i < remote->fetch_refspec_nr; i++)
 603                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 604                         return error(_("Could not append '%s' to '%s'"),
 605                                         remote->fetch_refspec[i], buf.buf);
 606         if (remote->origin == REMOTE_REMOTES)
 607                 path = git_path("remotes/%s", remote->name);
 608         else if (remote->origin == REMOTE_BRANCHES)
 609                 path = git_path("branches/%s", remote->name);
 610         if (path)
 611                 unlink_or_warn(path);
 612         return 0;
 613 }
 614
 615 static int mv(int argc, const char **argv)
 616 {
 617         struct option options[] = {
 618                 OPT_END()
 619         };
 620         struct remote *oldremote, *newremote;
 621         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT,
 622                 old_remote_context = STRBUF_INIT;
 623         struct string_list remote_branches = STRING_LIST_INIT_NODUP;
 624         struct rename_info rename;
 625         int i, refspec_updated = 0;
 626
 627         if (argc != 3)
 628                 usage_with_options(builtin_remote_rename_usage, options);
 629
 630         rename.old = argv[1];
 631         rename.new = argv[2];
 632         rename.remote_branches = &remote_branches;
 633
 634         oldremote = remote_get(rename.old);
 635         if (!oldremote)
 636                 die(_("No such remote: %s"), rename.old);
 637
 638         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 639                 return migrate_file(oldremote);
 640
 641         newremote = remote_get(rename.new);
 642         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 643                 die(_("remote %s already exists."), rename.new);
 644
 645         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 646         if (!valid_fetch_refspec(buf.buf))
 647                 die(_("'%s' is not a valid remote name"), rename.new);
 648
 649         strbuf_reset(&buf);
 650         strbuf_addf(&buf, "remote.%s", rename.old);
 651         strbuf_addf(&buf2, "remote.%s", rename.new);
 652         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 653                 return error(_("Could not rename config section '%s' to '%s'"),
 654                                 buf.buf, buf2.buf);
 655
 656         strbuf_reset(&buf);
 657         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 658         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 659                 return error(_("Could not remove config section '%s'"), buf.buf);
 660         strbuf_addf(&old_remote_context, ":refs/remotes/%s/", rename.old);
 661         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 662                 char *ptr;
 663
 664                 strbuf_reset(&buf2);
 665                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 666                 ptr = strstr(buf2.buf, old_remote_context.buf);
 667                 if (ptr) {
 668                         refspec_updated = 1;
 669                         strbuf_splice(&buf2,
 670                                       ptr-buf2.buf + strlen(":refs/remotes/"),
 671                                       strlen(rename.old), rename.new,
 672                                       strlen(rename.new));
 673                 } else
 674                         warning(_("Not updating non-default fetch refspec\n"
 675                                   "\t%s\n"
 676                                   "\tPlease update the configuration manually if necessary."),
 677                                 buf2.buf);
 678
 679                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 680                         return error(_("Could not append '%s'"), buf.buf);
 681         }
 682
 683         read_branches();
 684         for (i = 0; i < branch_list.nr; i++) {
 685                 struct string_list_item *item = branch_list.items + i;
 686                 struct branch_info *info = item->util;
 687                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 688                         strbuf_reset(&buf);
 689                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 690                         if (git_config_set(buf.buf, rename.new)) {
 691                                 return error(_("Could not set '%s'"), buf.buf);
 692                         }
 693                 }
 694         }
 695
 696         if (!refspec_updated)
 697                 return 0;
 698
 699         /*
 700          * First remove symrefs, then rename the rest, finally create
 701          * the new symrefs.
 702          */
 703         for_each_ref(read_remote_branches, &rename);
 704         for (i = 0; i < remote_branches.nr; i++) {
 705                 struct string_list_item *item = remote_branches.items + i;
 706                 int flag = 0;
 707                 unsigned char sha1[20];
 708
 709                 read_ref_full(item->string, RESOLVE_REF_READING, sha1, &flag);
 710                 if (!(flag & REF_ISSYMREF))
 711                         continue;
 712                 if (delete_ref(item->string, NULL, REF_NODEREF))
 713                         die(_("deleting '%s' failed"), item->string);
 714         }
 715         for (i = 0; i < remote_branches.nr; i++) {
 716                 struct string_list_item *item = remote_branches.items + i;
 717
 718                 if (item->util)
 719                         continue;
 720                 strbuf_reset(&buf);
 721                 strbuf_addstr(&buf, item->string);
 722                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 723                                 rename.new, strlen(rename.new));
 724                 strbuf_reset(&buf2);
 725                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 726                                 item->string, buf.buf);
 727                 if (rename_ref(item->string, buf.buf, buf2.buf))
 728                         die(_("renaming '%s' failed"), item->string);
 729         }
 730         for (i = 0; i < remote_branches.nr; i++) {
 731                 struct string_list_item *item = remote_branches.items + i;
 732
 733                 if (!item->util)
 734                         continue;
 735                 strbuf_reset(&buf);
 736                 strbuf_addstr(&buf, item->string);
 737                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 738                                 rename.new, strlen(rename.new));
 739                 strbuf_reset(&buf2);
 740                 strbuf_addstr(&buf2, item->util);
 741                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 742                                 rename.new, strlen(rename.new));
 743                 strbuf_reset(&buf3);
 744                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 745                                 item->string, buf.buf);
 746                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 747                         die(_("creating '%s' failed"), buf.buf);
 748         }
 749         return 0;
 750 }
 751
 752 static int remove_branches(struct string_list *branches)
 753 {
 754         struct strbuf err = STRBUF_INIT;
 755         int i, result = 0;
 756
 757         if (repack_without_refs(branches, &err))
 758                 result |= error("%s", err.buf);
 759         strbuf_release(&err);
 760
 761         for (i = 0; i < branches->nr; i++) {
 762                 struct string_list_item *item = branches->items + i;
 763                 const char *refname = item->string;
 764
 765                 if (delete_ref(refname, NULL, 0))
 766                         result |= error(_("Could not remove branch %s"), refname);
 767         }
 768
 769         return result;
 770 }
 771
 772 static int rm(int argc, const char **argv)
 773 {
 774         struct option options[] = {
 775                 OPT_END()
 776         };
 777         struct remote *remote;
 778         struct strbuf buf = STRBUF_INIT;
 779         struct known_remotes known_remotes = { NULL, NULL };
 780         struct string_list branches = STRING_LIST_INIT_DUP;
 781         struct string_list skipped = STRING_LIST_INIT_DUP;
 782         struct branches_for_remote cb_data;
 783         int i, result;
 784
 785         memset(&cb_data, 0, sizeof(cb_data));
 786         cb_data.branches = &branches;
 787         cb_data.skipped = &skipped;
 788         cb_data.keep = &known_remotes;
 789
 790         if (argc != 2)
 791                 usage_with_options(builtin_remote_rm_usage, options);
 792
 793         remote = remote_get(argv[1]);
 794         if (!remote)
 795                 die(_("No such remote: %s"), argv[1]);
 796
 797         known_remotes.to_delete = remote;
 798         for_each_remote(add_known_remote, &known_remotes);
 799
 800         read_branches();
 801         for (i = 0; i < branch_list.nr; i++) {
 802                 struct string_list_item *item = branch_list.items + i;
 803                 struct branch_info *info = item->util;
 804                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 805                         const char *keys[] = { "remote", "merge", NULL }, **k;
 806                         for (k = keys; *k; k++) {
 807                                 strbuf_reset(&buf);
 808                                 strbuf_addf(&buf, "branch.%s.%s",
 809                                                 item->string, *k);
 810                                 if (git_config_set(buf.buf, NULL)) {
 811                                         strbuf_release(&buf);
 812                                         return -1;
 813                                 }
 814                         }
 815                 }
 816         }
 817
 818         /*
 819          * We cannot just pass a function to for_each_ref() which deletes
 820          * the branches one by one, since for_each_ref() relies on cached
 821          * refs, which are invalidated when deleting a branch.
 822          */
 823         cb_data.remote = remote;
 824         result = for_each_ref(add_branch_for_removal, &cb_data);
 825         strbuf_release(&buf);
 826
 827         if (!result)
 828                 result = remove_branches(&branches);
 829         string_list_clear(&branches, 1);
 830
 831         if (skipped.nr) {
 832                 fprintf_ln(stderr,
 833                            Q_("Note: A branch outside the refs/remotes/ hierarchy was not removed;\n"
 834                               "to delete it, use:",
 835                               "Note: Some branches outside the refs/remotes/ hierarchy were not removed;\n"
 836                               "to delete them, use:",
 837                               skipped.nr));
 838                 for (i = 0; i < skipped.nr; i++)
 839                         fprintf(stderr, "  git branch -d %s\n",
 840                                 skipped.items[i].string);
 841         }
 842         string_list_clear(&skipped, 0);
 843
 844         if (!result) {
 845                 strbuf_addf(&buf, "remote.%s", remote->name);
 846                 if (git_config_rename_section(buf.buf, NULL) < 1)
 847                         return error(_("Could not remove config section '%s'"), buf.buf);
 848         }
 849
 850         return result;
 851 }
 852
 853 static void clear_push_info(void *util, const char *string)
 854 {
 855         struct push_info *info = util;
 856         free(info->dest);
 857         free(info);
 858 }
 859
 860 static void free_remote_ref_states(struct ref_states *states)
 861 {
 862         string_list_clear(&states->new, 0);
 863         string_list_clear(&states->stale, 1);
 864         string_list_clear(&states->tracked, 0);
 865         string_list_clear(&states->heads, 0);
 866         string_list_clear_func(&states->push, clear_push_info);
 867 }
 868
 869 static int append_ref_to_tracked_list(const char *refname,
 870         const unsigned char *sha1, int flags, void *cb_data)
 871 {
 872         struct ref_states *states = cb_data;
 873         struct refspec refspec;
 874
 875         if (flags & REF_ISSYMREF)
 876                 return 0;
 877
 878         memset(&refspec, 0, sizeof(refspec));
 879         refspec.dst = (char *)refname;
 880         if (!remote_find_tracking(states->remote, &refspec))
 881                 string_list_append(&states->tracked, abbrev_branch(refspec.src));
 882
 883         return 0;
 884 }
 885
 886 static int get_remote_ref_states(const char *name,
 887                                  struct ref_states *states,
 888                                  int query)
 889 {
 890         struct transport *transport;
 891         const struct ref *remote_refs;
 892
 893         states->remote = remote_get(name);
 894         if (!states->remote)
 895                 return error(_("No such remote: %s"), name);
 896
 897         read_branches();
 898
 899         if (query) {
 900                 transport = transport_get(states->remote, states->remote->url_nr > 0 ?
 901                         states->remote->url[0] : NULL);
 902                 remote_refs = transport_get_remote_refs(transport);
 903                 transport_disconnect(transport);
 904
 905                 states->queried = 1;
 906                 if (query & GET_REF_STATES)
 907                         get_ref_states(remote_refs, states);
 908                 if (query & GET_HEAD_NAMES)
 909                         get_head_names(remote_refs, states);
 910                 if (query & GET_PUSH_REF_STATES)
 911                         get_push_ref_states(remote_refs, states);
 912         } else {
 913                 for_each_ref(append_ref_to_tracked_list, states);
 914                 string_list_sort(&states->tracked);
 915                 get_push_ref_states_noquery(states);
 916         }
 917
 918         return 0;
 919 }
 920
 921 struct show_info {
 922         struct string_list *list;
 923         struct ref_states *states;
 924         int width, width2;
 925         int any_rebase;
 926 };
 927
 928 static int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 929 {
 930         struct show_info *info = cb_data;
 931         int n = strlen(item->string);
 932         if (n > info->width)
 933                 info->width = n;
 934         string_list_insert(info->list, item->string);
 935         return 0;
 936 }
 937
 938 static int show_remote_info_item(struct string_list_item *item, void *cb_data)
 939 {
 940         struct show_info *info = cb_data;
 941         struct ref_states *states = info->states;
 942         const char *name = item->string;
 943
 944         if (states->queried) {
 945                 const char *fmt = "%s";
 946                 const char *arg = "";
 947                 if (string_list_has_string(&states->new, name)) {
 948                         fmt = _(" new (next fetch will store in remotes/%s)");
 949                         arg = states->remote->name;
 950                 } else if (string_list_has_string(&states->tracked, name))
 951                         arg = _(" tracked");
 952                 else if (string_list_has_string(&states->stale, name))
 953                         arg = _(" stale (use 'git remote prune' to remove)");
 954                 else
 955                         arg = _(" ???");
 956                 printf("    %-*s", info->width, name);
 957                 printf(fmt, arg);
 958                 printf("\n");
 959         } else
 960                 printf("    %s\n", name);
 961
 962         return 0;
 963 }
 964
 965 static int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 966 {
 967         struct show_info *show_info = cb_data;
 968         struct ref_states *states = show_info->states;
 969         struct branch_info *branch_info = branch_item->util;
 970         struct string_list_item *item;
 971         int n;
 972
 973         if (!branch_info->merge.nr || !branch_info->remote_name ||
 974             strcmp(states->remote->name, branch_info->remote_name))
 975                 return 0;
 976         if ((n = strlen(branch_item->string)) > show_info->width)
 977                 show_info->width = n;
 978         if (branch_info->rebase)
 979                 show_info->any_rebase = 1;
 980
 981         item = string_list_insert(show_info->list, branch_item->string);
 982         item->util = branch_info;
 983
 984         return 0;
 985 }
 986
 987 static int show_local_info_item(struct string_list_item *item, void *cb_data)
 988 {
 989         struct show_info *show_info = cb_data;
 990         struct branch_info *branch_info = item->util;
 991         struct string_list *merge = &branch_info->merge;
 992         const char *also;
 993         int i;
 994
 995         if (branch_info->rebase && branch_info->merge.nr > 1) {
 996                 error(_("invalid branch.%s.merge; cannot rebase onto > 1 branch"),
 997                         item->string);
 998                 return 0;
 999         }
1000
1001         printf("    %-*s ", show_info->width, item->string);
1002         if (branch_info->rebase) {
1003                 printf_ln(_("rebases onto remote %s"), merge->items[0].string);
1004                 return 0;
1005         } else if (show_info->any_rebase) {
1006                 printf_ln(_(" merges with remote %s"), merge->items[0].string);
1007                 also = _("    and with remote");
1008         } else {
1009                 printf_ln(_("merges with remote %s"), merge->items[0].string);
1010                 also = _("   and with remote");
1011         }
1012         for (i = 1; i < merge->nr; i++)
1013                 printf("    %-*s %s %s\n", show_info->width, "", also,
1014                        merge->items[i].string);
1015
1016         return 0;
1017 }
1018
1019 static int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
1020 {
1021         struct show_info *show_info = cb_data;
1022         struct push_info *push_info = push_item->util;
1023         struct string_list_item *item;
1024         int n;
1025         if ((n = strlen(push_item->string)) > show_info->width)
1026                 show_info->width = n;
1027         if ((n = strlen(push_info->dest)) > show_info->width2)
1028                 show_info->width2 = n;
1029         item = string_list_append(show_info->list, push_item->string);
1030         item->util = push_item->util;
1031         return 0;
1032 }
1033
1034 /*
1035  * Sorting comparison for a string list that has push_info
1036  * structs in its util field
1037  */
1038 static int cmp_string_with_push(const void *va, const void *vb)
1039 {
1040         const struct string_list_item *a = va;
1041         const struct string_list_item *b = vb;
1042         const struct push_info *a_push = a->util;
1043         const struct push_info *b_push = b->util;
1044         int cmp = strcmp(a->string, b->string);
1045         return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
1046 }
1047
1048 static int show_push_info_item(struct string_list_item *item, void *cb_data)
1049 {
1050         struct show_info *show_info = cb_data;
1051         struct push_info *push_info = item->util;
1052         const char *src = item->string, *status = NULL;
1053
1054         switch (push_info->status) {
1055         case PUSH_STATUS_CREATE:
1056                 status = _("create");
1057                 break;
1058         case PUSH_STATUS_DELETE:
1059                 status = _("delete");
1060                 src = _("(none)");
1061                 break;
1062         case PUSH_STATUS_UPTODATE:
1063                 status = _("up to date");
1064                 break;
1065         case PUSH_STATUS_FASTFORWARD:
1066                 status = _("fast-forwardable");
1067                 break;
1068         case PUSH_STATUS_OUTOFDATE:
1069                 status = _("local out of date");
1070                 break;
1071         case PUSH_STATUS_NOTQUERIED:
1072                 break;
1073         }
1074         if (status) {
1075                 if (push_info->forced)
1076                         printf_ln(_("    %-*s forces to %-*s (%s)"), show_info->width, src,
1077                                show_info->width2, push_info->dest, status);
1078                 else
1079                         printf_ln(_("    %-*s pushes to %-*s (%s)"), show_info->width, src,
1080                                show_info->width2, push_info->dest, status);
1081         } else {
1082                 if (push_info->forced)
1083                         printf_ln(_("    %-*s forces to %s"), show_info->width, src,
1084                                push_info->dest);
1085                 else
1086                         printf_ln(_("    %-*s pushes to %s"), show_info->width, src,
1087                                push_info->dest);
1088         }
1089         return 0;
1090 }
1091
1092 static int get_one_entry(struct remote *remote, void *priv)
1093 {
1094         struct string_list *list = priv;
1095         struct strbuf url_buf = STRBUF_INIT;
1096         const char **url;
1097         int i, url_nr;
1098
1099         if (remote->url_nr > 0) {
1100                 strbuf_addf(&url_buf, "%s (fetch)", remote->url[0]);
1101                 string_list_append(list, remote->name)->util =
1102                                 strbuf_detach(&url_buf, NULL);
1103         } else
1104                 string_list_append(list, remote->name)->util = NULL;
1105         if (remote->pushurl_nr) {
1106                 url = remote->pushurl;
1107                 url_nr = remote->pushurl_nr;
1108         } else {
1109                 url = remote->url;
1110                 url_nr = remote->url_nr;
1111         }
1112         for (i = 0; i < url_nr; i++)
1113         {
1114                 strbuf_addf(&url_buf, "%s (push)", url[i]);
1115                 string_list_append(list, remote->name)->util =
1116                                 strbuf_detach(&url_buf, NULL);
1117         }
1118
1119         return 0;
1120 }
1121
1122 static int show_all(void)
1123 {
1124         struct string_list list = STRING_LIST_INIT_NODUP;
1125         int result;
1126
1127         list.strdup_strings = 1;
1128         result = for_each_remote(get_one_entry, &list);
1129
1130         if (!result) {
1131                 int i;
1132
1133                 string_list_sort(&list);
1134                 for (i = 0; i < list.nr; i++) {
1135                         struct string_list_item *item = list.items + i;
1136                         if (verbose)
1137                                 printf("%s\t%s\n", item->string,
1138                                         item->util ? (const char *)item->util : "");
1139                         else {
1140                                 if (i && !strcmp((item - 1)->string, item->string))
1141                                         continue;
1142                                 printf("%s\n", item->string);
1143                         }
1144                 }
1145         }
1146         string_list_clear(&list, 1);
1147         return result;
1148 }
1149
1150 static int show(int argc, const char **argv)
1151 {
1152         int no_query = 0, result = 0, query_flag = 0;
1153         struct option options[] = {
1154                 OPT_BOOL('n', NULL, &no_query, N_("do not query remotes")),
1155                 OPT_END()
1156         };
1157         struct ref_states states;
1158         struct string_list info_list = STRING_LIST_INIT_NODUP;
1159         struct show_info info;
1160
1161         argc = parse_options(argc, argv, NULL, options, builtin_remote_show_usage,
1162                              0);
1163
1164         if (argc < 1)
1165                 return show_all();
1166
1167         if (!no_query)
1168                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
1169
1170         memset(&states, 0, sizeof(states));
1171         memset(&info, 0, sizeof(info));
1172         info.states = &states;
1173         info.list = &info_list;
1174         for (; argc; argc--, argv++) {
1175                 int i;
1176                 const char **url;
1177                 int url_nr;
1178
1179                 get_remote_ref_states(*argv, &states, query_flag);
1180
1181                 printf_ln(_("* remote %s"), *argv);
1182                 printf_ln(_("  Fetch URL: %s"), states.remote->url_nr > 0 ?
1183                        states.remote->url[0] : _("(no URL)"));
1184                 if (states.remote->pushurl_nr) {
1185                         url = states.remote->pushurl;
1186                         url_nr = states.remote->pushurl_nr;
1187                 } else {
1188                         url = states.remote->url;
1189                         url_nr = states.remote->url_nr;
1190                 }
1191                 for (i = 0; i < url_nr; i++)
1192                         printf_ln(_("  Push  URL: %s"), url[i]);
1193                 if (!i)
1194                         printf_ln(_("  Push  URL: %s"), "(no URL)");
1195                 if (no_query)
1196                         printf_ln(_("  HEAD branch: %s"), "(not queried)");
1197                 else if (!states.heads.nr)
1198                         printf_ln(_("  HEAD branch: %s"), "(unknown)");
1199                 else if (states.heads.nr == 1)
1200                         printf_ln(_("  HEAD branch: %s"), states.heads.items[0].string);
1201                 else {
1202                         printf(_("  HEAD branch (remote HEAD is ambiguous,"
1203                                  " may be one of the following):\n"));
1204                         for (i = 0; i < states.heads.nr; i++)
1205                                 printf("    %s\n", states.heads.items[i].string);
1206                 }
1207
1208                 /* remote branch info */
1209                 info.width = 0;
1210                 for_each_string_list(&states.new, add_remote_to_show_info, &info);
1211                 for_each_string_list(&states.tracked, add_remote_to_show_info, &info);
1212                 for_each_string_list(&states.stale, add_remote_to_show_info, &info);
1213                 if (info.list->nr)
1214                         printf_ln(Q_("  Remote branch:%s",
1215                                      "  Remote branches:%s",
1216                                      info.list->nr),
1217                                   no_query ? _(" (status not queried)") : "");
1218                 for_each_string_list(info.list, show_remote_info_item, &info);
1219                 string_list_clear(info.list, 0);
1220
1221                 /* git pull info */
1222                 info.width = 0;
1223                 info.any_rebase = 0;
1224                 for_each_string_list(&branch_list, add_local_to_show_info, &info);
1225                 if (info.list->nr)
1226                         printf_ln(Q_("  Local branch configured for 'git pull':",
1227                                      "  Local branches configured for 'git pull':",
1228                                      info.list->nr));
1229                 for_each_string_list(info.list, show_local_info_item, &info);
1230                 string_list_clear(info.list, 0);
1231
1232                 /* git push info */
1233                 if (states.remote->mirror)
1234                         printf_ln(_("  Local refs will be mirrored by 'git push'"));
1235
1236                 info.width = info.width2 = 0;
1237                 for_each_string_list(&states.push, add_push_to_show_info, &info);
1238                 qsort(info.list->items, info.list->nr,
1239                         sizeof(*info.list->items), cmp_string_with_push);
1240                 if (info.list->nr)
1241                         printf_ln(Q_("  Local ref configured for 'git push'%s:",
1242                                      "  Local refs configured for 'git push'%s:",
1243                                      info.list->nr),
1244                                   no_query ? _(" (status not queried)") : "");
1245                 for_each_string_list(info.list, show_push_info_item, &info);
1246                 string_list_clear(info.list, 0);
1247
1248                 free_remote_ref_states(&states);
1249         }
1250
1251         return result;
1252 }
1253
1254 static int set_head(int argc, const char **argv)
1255 {
1256         int i, opt_a = 0, opt_d = 0, result = 0;
1257         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1258         char *head_name = NULL;
1259
1260         struct option options[] = {
1261                 OPT_BOOL('a', "auto", &opt_a,
1262                          N_("set refs/remotes/<name>/HEAD according to remote")),
1263                 OPT_BOOL('d', "delete", &opt_d,
1264                          N_("delete refs/remotes/<name>/HEAD")),
1265                 OPT_END()
1266         };
1267         argc = parse_options(argc, argv, NULL, options, builtin_remote_sethead_usage,
1268                              0);
1269         if (argc)
1270                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1271
1272         if (!opt_a && !opt_d && argc == 2) {
1273                 head_name = xstrdup(argv[1]);
1274         } else if (opt_a && !opt_d && argc == 1) {
1275                 struct ref_states states;
1276                 memset(&states, 0, sizeof(states));
1277                 get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1278                 if (!states.heads.nr)
1279                         result |= error(_("Cannot determine remote HEAD"));
1280                 else if (states.heads.nr > 1) {
1281                         result |= error(_("Multiple remote HEAD branches. "
1282                                           "Please choose one explicitly with:"));
1283                         for (i = 0; i < states.heads.nr; i++)
1284                                 fprintf(stderr, "  git remote set-head %s %s\n",
1285                                         argv[0], states.heads.items[i].string);
1286                 } else
1287                         head_name = xstrdup(states.heads.items[0].string);
1288                 free_remote_ref_states(&states);
1289         } else if (opt_d && !opt_a && argc == 1) {
1290                 if (delete_ref(buf.buf, NULL, REF_NODEREF))
1291                         result |= error(_("Could not delete %s"), buf.buf);
1292         } else
1293                 usage_with_options(builtin_remote_sethead_usage, options);
1294
1295         if (head_name) {
1296                 strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1297                 /* make sure it's valid */
1298                 if (!ref_exists(buf2.buf))
1299                         result |= error(_("Not a valid ref: %s"), buf2.buf);
1300                 else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1301                         result |= error(_("Could not setup %s"), buf.buf);
1302                 if (opt_a)
1303                         printf("%s/HEAD set to %s\n", argv[0], head_name);
1304                 free(head_name);
1305         }
1306
1307         strbuf_release(&buf);
1308         strbuf_release(&buf2);
1309         return result;
1310 }
1311
1312 static int prune_remote(const char *remote, int dry_run)
1313 {
1314         int result = 0;
1315         struct ref_states states;
1316         struct string_list refs_to_prune = STRING_LIST_INIT_NODUP;
1317         struct string_list_item *item;
1318         const char *dangling_msg = dry_run
1319                 ? _(" %s will become dangling!")
1320                 : _(" %s has become dangling!");
1321
1322         memset(&states, 0, sizeof(states));
1323         get_remote_ref_states(remote, &states, GET_REF_STATES);
1324
1325         if (!states.stale.nr) {
1326                 free_remote_ref_states(&states);
1327                 return 0;
1328         }
1329
1330         printf_ln(_("Pruning %s"), remote);
1331         printf_ln(_("URL: %s"),
1332                   states.remote->url_nr
1333                   ? states.remote->url[0]
1334                   : _("(no URL)"));
1335
1336         for_each_string_list_item(item, &states.stale)
1337                 string_list_append(&refs_to_prune, item->util);
1338         string_list_sort(&refs_to_prune);
1339
1340         if (!dry_run) {
1341                 struct strbuf err = STRBUF_INIT;
1342                 if (repack_without_refs(&refs_to_prune, &err))
1343                         result |= error("%s", err.buf);
1344                 strbuf_release(&err);
1345         }
1346
1347         for_each_string_list_item(item, &states.stale) {
1348                 const char *refname = item->util;
1349
1350                 if (!dry_run)
1351                         result |= delete_ref(refname, NULL, 0);
1352
1353                 if (dry_run)
1354                         printf_ln(_(" * [would prune] %s"),
1355                                abbrev_ref(refname, "refs/remotes/"));
1356                 else
1357                         printf_ln(_(" * [pruned] %s"),
1358                                abbrev_ref(refname, "refs/remotes/"));
1359         }
1360
1361         warn_dangling_symrefs(stdout, dangling_msg, &refs_to_prune);
1362
1363         string_list_clear(&refs_to_prune, 0);
1364         free_remote_ref_states(&states);
1365         return result;
1366 }
1367
1368 static int prune(int argc, const char **argv)
1369 {
1370         int dry_run = 0, result = 0;
1371         struct option options[] = {
1372                 OPT__DRY_RUN(&dry_run, N_("dry run")),
1373                 OPT_END()
1374         };
1375
1376         argc = parse_options(argc, argv, NULL, options, builtin_remote_prune_usage,
1377                              0);
1378
1379         if (argc < 1)
1380                 usage_with_options(builtin_remote_prune_usage, options);
1381
1382         for (; argc; argc--, argv++)
1383                 result |= prune_remote(*argv, dry_run);
1384
1385         return result;
1386 }
1387
1388 static int get_remote_default(const char *key, const char *value, void *priv)
1389 {
1390         if (strcmp(key, "remotes.default") == 0) {
1391                 int *found = priv;
1392                 *found = 1;
1393         }
1394         return 0;
1395 }
1396
1397 static int update(int argc, const char **argv)
1398 {
1399         int i, prune = -1;
1400         struct option options[] = {
1401                 OPT_BOOL('p', "prune", &prune,
1402                          N_("prune remotes after fetching")),
1403                 OPT_END()
1404         };
1405         struct argv_array fetch_argv = ARGV_ARRAY_INIT;
1406         int default_defined = 0;
1407         int retval;
1408
1409         argc = parse_options(argc, argv, NULL, options, builtin_remote_update_usage,
1410                              PARSE_OPT_KEEP_ARGV0);
1411
1412         argv_array_push(&fetch_argv, "fetch");
1413
1414         if (prune != -1)
1415                 argv_array_push(&fetch_argv, prune ? "--prune" : "--no-prune");
1416         if (verbose)
1417                 argv_array_push(&fetch_argv, "-v");
1418         argv_array_push(&fetch_argv, "--multiple");
1419         if (argc < 2)
1420                 argv_array_push(&fetch_argv, "default");
1421         for (i = 1; i < argc; i++)
1422                 argv_array_push(&fetch_argv, argv[i]);
1423
1424         if (strcmp(fetch_argv.argv[fetch_argv.argc-1], "default") == 0) {
1425                 git_config(get_remote_default, &default_defined);
1426                 if (!default_defined) {
1427                         argv_array_pop(&fetch_argv);
1428                         argv_array_push(&fetch_argv, "--all");
1429                 }
1430         }
1431
1432         retval = run_command_v_opt(fetch_argv.argv, RUN_GIT_CMD);
1433         argv_array_clear(&fetch_argv);
1434         return retval;
1435 }
1436
1437 static int remove_all_fetch_refspecs(const char *remote, const char *key)
1438 {
1439         return git_config_set_multivar(key, NULL, NULL, 1);
1440 }
1441
1442 static int add_branches(struct remote *remote, const char **branches,
1443                         const char *key)
1444 {
1445         const char *remotename = remote->name;
1446         int mirror = remote->mirror;
1447         struct strbuf refspec = STRBUF_INIT;
1448
1449         for (; *branches; branches++)
1450                 if (add_branch(key, *branches, remotename, mirror, &refspec)) {
1451                         strbuf_release(&refspec);
1452                         return 1;
1453                 }
1454
1455         strbuf_release(&refspec);
1456         return 0;
1457 }
1458
1459 static int set_remote_branches(const char *remotename, const char **branches,
1460                                 int add_mode)
1461 {
1462         struct strbuf key = STRBUF_INIT;
1463         struct remote *remote;
1464
1465         strbuf_addf(&key, "remote.%s.fetch", remotename);
1466
1467         if (!remote_is_configured(remotename))
1468                 die(_("No such remote '%s'"), remotename);
1469         remote = remote_get(remotename);
1470
1471         if (!add_mode && remove_all_fetch_refspecs(remotename, key.buf)) {
1472                 strbuf_release(&key);
1473                 return 1;
1474         }
1475         if (add_branches(remote, branches, key.buf)) {
1476                 strbuf_release(&key);
1477                 return 1;
1478         }
1479
1480         strbuf_release(&key);
1481         return 0;
1482 }
1483
1484 static int set_branches(int argc, const char **argv)
1485 {
1486         int add_mode = 0;
1487         struct option options[] = {
1488                 OPT_BOOL('\0', "add", &add_mode, N_("add branch")),
1489                 OPT_END()
1490         };
1491
1492         argc = parse_options(argc, argv, NULL, options,
1493                              builtin_remote_setbranches_usage, 0);
1494         if (argc == 0) {
1495                 error(_("no remote specified"));
1496                 usage_with_options(builtin_remote_setbranches_usage, options);
1497         }
1498         argv[argc] = NULL;
1499
1500         return set_remote_branches(argv[0], argv + 1, add_mode);
1501 }
1502
1503 static int set_url(int argc, const char **argv)
1504 {
1505         int i, push_mode = 0, add_mode = 0, delete_mode = 0;
1506         int matches = 0, negative_matches = 0;
1507         const char *remotename = NULL;
1508         const char *newurl = NULL;
1509         const char *oldurl = NULL;
1510         struct remote *remote;
1511         regex_t old_regex;
1512         const char **urlset;
1513         int urlset_nr;
1514         struct strbuf name_buf = STRBUF_INIT;
1515         struct option options[] = {
1516                 OPT_BOOL('\0', "push", &push_mode,
1517                          N_("manipulate push URLs")),
1518                 OPT_BOOL('\0', "add", &add_mode,
1519                          N_("add URL")),
1520                 OPT_BOOL('\0', "delete", &delete_mode,
1521                             N_("delete URLs")),
1522                 OPT_END()
1523         };
1524         argc = parse_options(argc, argv, NULL, options, builtin_remote_seturl_usage,
1525                              PARSE_OPT_KEEP_ARGV0);
1526
1527         if (add_mode && delete_mode)
1528                 die(_("--add --delete doesn't make sense"));
1529
1530         if (argc < 3 || argc > 4 || ((add_mode || delete_mode) && argc != 3))
1531                 usage_with_options(builtin_remote_seturl_usage, options);
1532
1533         remotename = argv[1];
1534         newurl = argv[2];
1535         if (argc > 3)
1536                 oldurl = argv[3];
1537
1538         if (delete_mode)
1539                 oldurl = newurl;
1540
1541         if (!remote_is_configured(remotename))
1542                 die(_("No such remote '%s'"), remotename);
1543         remote = remote_get(remotename);
1544
1545         if (push_mode) {
1546                 strbuf_addf(&name_buf, "remote.%s.pushurl", remotename);
1547                 urlset = remote->pushurl;
1548                 urlset_nr = remote->pushurl_nr;
1549         } else {
1550                 strbuf_addf(&name_buf, "remote.%s.url", remotename);
1551                 urlset = remote->url;
1552                 urlset_nr = remote->url_nr;
1553         }
1554
1555         /* Special cases that add new entry. */
1556         if ((!oldurl && !delete_mode) || add_mode) {
1557                 if (add_mode)
1558                         git_config_set_multivar(name_buf.buf, newurl,
1559                                 "^$", 0);
1560                 else
1561                         git_config_set(name_buf.buf, newurl);
1562                 strbuf_release(&name_buf);
1563                 return 0;
1564         }
1565
1566         /* Old URL specified. Demand that one matches. */
1567         if (regcomp(&old_regex, oldurl, REG_EXTENDED))
1568                 die(_("Invalid old URL pattern: %s"), oldurl);
1569
1570         for (i = 0; i < urlset_nr; i++)
1571                 if (!regexec(&old_regex, urlset[i], 0, NULL, 0))
1572                         matches++;
1573                 else
1574                         negative_matches++;
1575         if (!delete_mode && !matches)
1576                 die(_("No such URL found: %s"), oldurl);
1577         if (delete_mode && !negative_matches && !push_mode)
1578                 die(_("Will not delete all non-push URLs"));
1579
1580         regfree(&old_regex);
1581
1582         if (!delete_mode)
1583                 git_config_set_multivar(name_buf.buf, newurl, oldurl, 0);
1584         else
1585                 git_config_set_multivar(name_buf.buf, NULL, oldurl, 1);
1586         return 0;
1587 }
1588
1589 int cmd_remote(int argc, const char **argv, const char *prefix)
1590 {
1591         struct option options[] = {
1592                 OPT__VERBOSE(&verbose, N_("be verbose; must be placed before a subcommand")),
1593                 OPT_END()
1594         };
1595         int result;
1596
1597         argc = parse_options(argc, argv, prefix, options, builtin_remote_usage,
1598                 PARSE_OPT_STOP_AT_NON_OPTION);
1599
1600         if (argc < 1)
1601                 result = show_all();
1602         else if (!strcmp(argv[0], "add"))
1603                 result = add(argc, argv);
1604         else if (!strcmp(argv[0], "rename"))
1605                 result = mv(argc, argv);
1606         else if (!strcmp(argv[0], "rm") || !strcmp(argv[0], "remove"))
1607                 result = rm(argc, argv);
1608         else if (!strcmp(argv[0], "set-head"))
1609                 result = set_head(argc, argv);
1610         else if (!strcmp(argv[0], "set-branches"))
1611                 result = set_branches(argc, argv);
1612         else if (!strcmp(argv[0], "set-url"))
1613                 result = set_url(argc, argv);
1614         else if (!strcmp(argv[0], "show"))
1615                 result = show(argc, argv);
1616         else if (!strcmp(argv[0], "prune"))
1617                 result = prune(argc, argv);
1618         else if (!strcmp(argv[0], "update"))
1619                 result = update(argc, argv);
1620         else {
1621                 error(_("Unknown subcommand: %s"), argv[0]);
1622                 usage_with_options(builtin_remote_usage, options);
1623         }
1624
1625         return result ? 1 : 0;
1626 }