git.oblomov.eu Git - git/blob - 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
  10 static const char * const builtin_remote_usage[] = {
  11         "git remote [-v | --verbose]",
  12         "git remote add [-t <branch>] [-m <master>] [-f] [--mirror=<fetch|push>] <name> <url>",
  13         "git remote rename <old> <new>",
  14         "git remote rm <name>",
  15         "git remote set-head <name> (-a | -d | <branch>)",
  16         "git remote [-v | --verbose] show [-n] <name>",
  17         "git remote prune [-n | --dry-run] <name>",
  18         "git remote [-v | --verbose] update [-p | --prune] [(<group> | <remote>)...]",
  19         "git remote set-branches <name> [--add] <branch>...",
  20         "git remote set-url <name> <newurl> [<oldurl>]",
  21         "git remote set-url --add <name> <newurl>",
  22         "git remote set-url --delete <name> <url>",
  23         NULL
  24 };
  25
  26 static const char * const builtin_remote_add_usage[] = {
  27         "git remote add [<options>] <name> <url>",
  28         NULL
  29 };
  30
  31 static const char * const builtin_remote_rename_usage[] = {
  32         "git remote rename <old> <new>",
  33         NULL
  34 };
  35
  36 static const char * const builtin_remote_rm_usage[] = {
  37         "git remote rm <name>",
  38         NULL
  39 };
  40
  41 static const char * const builtin_remote_sethead_usage[] = {
  42         "git remote set-head <name> (-a | -d | <branch>])",
  43         NULL
  44 };
  45
  46 static const char * const builtin_remote_setbranches_usage[] = {
  47         "git remote set-branches <name> <branch>...",
  48         "git remote set-branches --add <name> <branch>...",
  49         NULL
  50 };
  51
  52 static const char * const builtin_remote_show_usage[] = {
  53         "git remote show [<options>] <name>",
  54         NULL
  55 };
  56
  57 static const char * const builtin_remote_prune_usage[] = {
  58         "git remote prune [<options>] <name>",
  59         NULL
  60 };
  61
  62 static const char * const builtin_remote_update_usage[] = {
  63         "git remote update [<options>] [<group> | <remote>]...",
  64         NULL
  65 };
  66
  67 static const char * const builtin_remote_seturl_usage[] = {
  68         "git remote set-url [--push] <name> <newurl> [<oldurl>]",
  69         "git remote set-url --add <name> <newurl>",
  70         "git remote set-url --delete <name> <url>",
  71         NULL
  72 };
  73
  74 #define GET_REF_STATES (1<<0)
  75 #define GET_HEAD_NAMES (1<<1)
  76 #define GET_PUSH_REF_STATES (1<<2)
  77
  78 static int verbose;
  79
  80 static int show_all(void);
  81 static int prune_remote(const char *remote, int dry_run);
  82
  83 static inline int postfixcmp(const char *string, const char *postfix)
  84 {
  85         int len1 = strlen(string), len2 = strlen(postfix);
  86         if (len1 < len2)
  87                 return 1;
  88         return strcmp(string + len1 - len2, postfix);
  89 }
  90
  91 static int opt_parse_track(const struct option *opt, const char *arg, int not)
  92 {
  93         struct string_list *list = opt->value;
  94         if (not)
  95                 string_list_clear(list, 0);
  96         else
  97                 string_list_append(list, arg);
  98         return 0;
  99 }
 100
 101 static int fetch_remote(const char *name)
 102 {
 103         const char *argv[] = { "fetch", name, NULL, NULL };
 104         if (verbose) {
 105                 argv[1] = "-v";
 106                 argv[2] = name;
 107         }
 108         printf("Updating %s\n", name);
 109         if (run_command_v_opt(argv, RUN_GIT_CMD))
 110                 return error("Could not fetch %s", name);
 111         return 0;
 112 }
 113
 114 enum {
 115         TAGS_UNSET = 0,
 116         TAGS_DEFAULT = 1,
 117         TAGS_SET = 2
 118 };
 119
 120 #define MIRROR_NONE 0
 121 #define MIRROR_FETCH 1
 122 #define MIRROR_PUSH 2
 123 #define MIRROR_BOTH (MIRROR_FETCH|MIRROR_PUSH)
 124
 125 static int add_branch(const char *key, const char *branchname,
 126                 const char *remotename, int mirror, struct strbuf *tmp)
 127 {
 128         strbuf_reset(tmp);
 129         strbuf_addch(tmp, '+');
 130         if (mirror)
 131                 strbuf_addf(tmp, "refs/%s:refs/%s",
 132                                 branchname, branchname);
 133         else
 134                 strbuf_addf(tmp, "refs/heads/%s:refs/remotes/%s/%s",
 135                                 branchname, remotename, branchname);
 136         return git_config_set_multivar(key, tmp->buf, "^$", 0);
 137 }
 138
 139 static const char mirror_advice[] =
 140 "--mirror is dangerous and deprecated; please\n"
 141 "\t use --mirror=fetch or --mirror=push instead";
 142
 143 static int parse_mirror_opt(const struct option *opt, const char *arg, int not)
 144 {
 145         unsigned *mirror = opt->value;
 146         if (not)
 147                 *mirror = MIRROR_NONE;
 148         else if (!arg) {
 149                 warning("%s", mirror_advice);
 150                 *mirror = MIRROR_BOTH;
 151         }
 152         else if (!strcmp(arg, "fetch"))
 153                 *mirror = MIRROR_FETCH;
 154         else if (!strcmp(arg, "push"))
 155                 *mirror = MIRROR_PUSH;
 156         else
 157                 return error("unknown mirror argument: %s", arg);
 158         return 0;
 159 }
 160
 161 static int add(int argc, const char **argv)
 162 {
 163         int fetch = 0, fetch_tags = TAGS_DEFAULT;
 164         unsigned mirror = MIRROR_NONE;
 165         struct string_list track = STRING_LIST_INIT_NODUP;
 166         const char *master = NULL;
 167         struct remote *remote;
 168         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
 169         const char *name, *url;
 170         int i;
 171
 172         struct option options[] = {
 173                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
 174                 OPT_SET_INT(0, "tags", &fetch_tags,
 175                             "import all tags and associated objects when fetching",
 176                             TAGS_SET),
 177                 OPT_SET_INT(0, NULL, &fetch_tags,
 178                             "or do not fetch any tag at all (--no-tags)", TAGS_UNSET),
 179                 OPT_CALLBACK('t', "track", &track, "branch",
 180                         "branch(es) to track", opt_parse_track),
 181                 OPT_STRING('m', "master", &master, "branch", "master branch"),
 182                 { OPTION_CALLBACK, 0, "mirror", &mirror, "push|fetch",
 183                         "set up remote as a mirror to push to or fetch from",
 184                         PARSE_OPT_OPTARG, parse_mirror_opt },
 185                 OPT_END()
 186         };
 187
 188         argc = parse_options(argc, argv, NULL, options, builtin_remote_add_usage,
 189                              0);
 190
 191         if (argc < 2)
 192                 usage_with_options(builtin_remote_add_usage, options);
 193
 194         if (mirror && master)
 195                 die("specifying a master branch makes no sense with --mirror");
 196         if (mirror && !(mirror & MIRROR_FETCH) && track.nr)
 197                 die("specifying branches to track makes sense only with fetch mirrors");
 198
 199         name = argv[0];
 200         url = argv[1];
 201
 202         remote = remote_get(name);
 203         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
 204                         remote->fetch_refspec_nr))
 205                 die("remote %s already exists.", name);
 206
 207         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
 208         if (!valid_fetch_refspec(buf2.buf))
 209                 die("'%s' is not a valid remote name", name);
 210
 211         strbuf_addf(&buf, "remote.%s.url", name);
 212         if (git_config_set(buf.buf, url))
 213                 return 1;
 214
 215         if (!mirror || mirror & MIRROR_FETCH) {
 216                 strbuf_reset(&buf);
 217                 strbuf_addf(&buf, "remote.%s.fetch", name);
 218                 if (track.nr == 0)
 219                         string_list_append(&track, "*");
 220                 for (i = 0; i < track.nr; i++) {
 221                         if (add_branch(buf.buf, track.items[i].string,
 222                                        name, mirror, &buf2))
 223                                 return 1;
 224                 }
 225         }
 226
 227         if (mirror & MIRROR_PUSH) {
 228                 strbuf_reset(&buf);
 229                 strbuf_addf(&buf, "remote.%s.mirror", name);
 230                 if (git_config_set(buf.buf, "true"))
 231                         return 1;
 232         }
 233
 234         if (fetch_tags != TAGS_DEFAULT) {
 235                 strbuf_reset(&buf);
 236                 strbuf_addf(&buf, "remote.%s.tagopt", name);
 237                 if (git_config_set(buf.buf,
 238                         fetch_tags == TAGS_SET ? "--tags" : "--no-tags"))
 239                         return 1;
 240         }
 241
 242         if (fetch && fetch_remote(name))
 243                 return 1;
 244
 245         if (master) {
 246                 strbuf_reset(&buf);
 247                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 248
 249                 strbuf_reset(&buf2);
 250                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 251
 252                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 253                         return error("Could not setup master '%s'", master);
 254         }
 255
 256         strbuf_release(&buf);
 257         strbuf_release(&buf2);
 258         string_list_clear(&track, 0);
 259
 260         return 0;
 261 }
 262
 263 struct branch_info {
 264         char *remote_name;
 265         struct string_list merge;
 266         int rebase;
 267 };
 268
 269 static struct string_list branch_list;
 270
 271 static const char *abbrev_ref(const char *name, const char *prefix)
 272 {
 273         const char *abbrev = skip_prefix(name, prefix);
 274         if (abbrev)
 275                 return abbrev;
 276         return name;
 277 }
 278 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 279
 280 static int config_read_branches(const char *key, const char *value, void *cb)
 281 {
 282         if (!prefixcmp(key, "branch.")) {
 283                 const char *orig_key = key;
 284                 char *name;
 285                 struct string_list_item *item;
 286                 struct branch_info *info;
 287                 enum { REMOTE, MERGE, REBASE } type;
 288
 289                 key += 7;
 290                 if (!postfixcmp(key, ".remote")) {
 291                         name = xstrndup(key, strlen(key) - 7);
 292                         type = REMOTE;
 293                 } else if (!postfixcmp(key, ".merge")) {
 294                         name = xstrndup(key, strlen(key) - 6);
 295                         type = MERGE;
 296                 } else if (!postfixcmp(key, ".rebase")) {
 297                         name = xstrndup(key, strlen(key) - 7);
 298                         type = REBASE;
 299                 } else
 300                         return 0;
 301
 302                 item = string_list_insert(&branch_list, name);
 303
 304                 if (!item->util)
 305                         item->util = xcalloc(sizeof(struct branch_info), 1);
 306                 info = item->util;
 307                 if (type == REMOTE) {
 308                         if (info->remote_name)
 309                                 warning("more than one %s", orig_key);
 310                         info->remote_name = xstrdup(value);
 311                 } else if (type == MERGE) {
 312                         char *space = strchr(value, ' ');
 313                         value = abbrev_branch(value);
 314                         while (space) {
 315                                 char *merge;
 316                                 merge = xstrndup(value, space - value);
 317                                 string_list_append(&info->merge, merge);
 318                                 value = abbrev_branch(space + 1);
 319                                 space = strchr(value, ' ');
 320                         }
 321                         string_list_append(&info->merge, xstrdup(value));
 322                 } else
 323                         info->rebase = git_config_bool(orig_key, value);
 324         }
 325         return 0;
 326 }
 327
 328 static void read_branches(void)
 329 {
 330         if (branch_list.nr)
 331                 return;
 332         git_config(config_read_branches, NULL);
 333 }
 334
 335 struct ref_states {
 336         struct remote *remote;
 337         struct string_list new, stale, tracked, heads, push;
 338         int queried;
 339 };
 340
 341 static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
 342 {
 343         struct ref *fetch_map = NULL, **tail = &fetch_map;
 344         struct ref *ref, *stale_refs;
 345         int i;
 346
 347         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 348                 if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 349                         die("Could not get fetch map for refspec %s",
 350                                 states->remote->fetch_refspec[i]);
 351
 352         states->new.strdup_strings = 1;
 353         states->tracked.strdup_strings = 1;
 354         states->stale.strdup_strings = 1;
 355         for (ref = fetch_map; ref; ref = ref->next) {
 356                 unsigned char sha1[20];
 357                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 358                         string_list_append(&states->new, abbrev_branch(ref->name));
 359                 else
 360                         string_list_append(&states->tracked, abbrev_branch(ref->name));
 361         }
 362         stale_refs = get_stale_heads(states->remote, fetch_map);
 363         for (ref = stale_refs; ref; ref = ref->next) {
 364                 struct string_list_item *item =
 365                         string_list_append(&states->stale, abbrev_branch(ref->name));
 366                 item->util = xstrdup(ref->name);
 367         }
 368         free_refs(stale_refs);
 369         free_refs(fetch_map);
 370
 371         sort_string_list(&states->new);
 372         sort_string_list(&states->tracked);
 373         sort_string_list(&states->stale);
 374
 375         return 0;
 376 }
 377
 378 struct push_info {
 379         char *dest;
 380         int forced;
 381         enum {
 382                 PUSH_STATUS_CREATE = 0,
 383                 PUSH_STATUS_DELETE,
 384                 PUSH_STATUS_UPTODATE,
 385                 PUSH_STATUS_FASTFORWARD,
 386                 PUSH_STATUS_OUTOFDATE,
 387                 PUSH_STATUS_NOTQUERIED
 388         } status;
 389 };
 390
 391 static int get_push_ref_states(const struct ref *remote_refs,
 392         struct ref_states *states)
 393 {
 394         struct remote *remote = states->remote;
 395         struct ref *ref, *local_refs, *push_map;
 396         if (remote->mirror)
 397                 return 0;
 398
 399         local_refs = get_local_heads();
 400         push_map = copy_ref_list(remote_refs);
 401
 402         match_refs(local_refs, &push_map, remote->push_refspec_nr,
 403                    remote->push_refspec, MATCH_REFS_NONE);
 404
 405         states->push.strdup_strings = 1;
 406         for (ref = push_map; ref; ref = ref->next) {
 407                 struct string_list_item *item;
 408                 struct push_info *info;
 409
 410                 if (!ref->peer_ref)
 411                         continue;
 412                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 413
 414                 item = string_list_append(&states->push,
 415                                           abbrev_branch(ref->peer_ref->name));
 416                 item->util = xcalloc(sizeof(struct push_info), 1);
 417                 info = item->util;
 418                 info->forced = ref->force;
 419                 info->dest = xstrdup(abbrev_branch(ref->name));
 420
 421                 if (is_null_sha1(ref->new_sha1)) {
 422                         info->status = PUSH_STATUS_DELETE;
 423                 } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 424                         info->status = PUSH_STATUS_UPTODATE;
 425                 else if (is_null_sha1(ref->old_sha1))
 426                         info->status = PUSH_STATUS_CREATE;
 427                 else if (has_sha1_file(ref->old_sha1) &&
 428                          ref_newer(ref->new_sha1, ref->old_sha1))
 429                         info->status = PUSH_STATUS_FASTFORWARD;
 430                 else
 431                         info->status = PUSH_STATUS_OUTOFDATE;
 432         }
 433         free_refs(local_refs);
 434         free_refs(push_map);
 435         return 0;
 436 }
 437
 438 static int get_push_ref_states_noquery(struct ref_states *states)
 439 {
 440         int i;
 441         struct remote *remote = states->remote;
 442         struct string_list_item *item;
 443         struct push_info *info;
 444
 445         if (remote->mirror)
 446                 return 0;
 447
 448         states->push.strdup_strings = 1;
 449         if (!remote->push_refspec_nr) {
 450                 item = string_list_append(&states->push, "(matching)");
 451                 info = item->util = xcalloc(sizeof(struct push_info), 1);
 452                 info->status = PUSH_STATUS_NOTQUERIED;
 453                 info->dest = xstrdup(item->string);
 454         }
 455         for (i = 0; i < remote->push_refspec_nr; i++) {
 456                 struct refspec *spec = remote->push + i;
 457                 if (spec->matching)
 458                         item = string_list_append(&states->push, "(matching)");
 459                 else if (strlen(spec->src))
 460                         item = string_list_append(&states->push, spec->src);
 461                 else
 462                         item = string_list_append(&states->push, "(delete)");
 463
 464                 info = item->util = xcalloc(sizeof(struct push_info), 1);
 465                 info->forced = spec->force;
 466                 info->status = PUSH_STATUS_NOTQUERIED;
 467                 info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 468         }
 469         return 0;
 470 }
 471
 472 static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 473 {
 474         struct ref *ref, *matches;
 475         struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 476         struct refspec refspec;
 477
 478         refspec.force = 0;
 479         refspec.pattern = 1;
 480         refspec.src = refspec.dst = "refs/heads/*";
 481         states->heads.strdup_strings = 1;
 482         get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 483         matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 484                                     fetch_map, 1);
 485         for (ref = matches; ref; ref = ref->next)
 486                 string_list_append(&states->heads, abbrev_branch(ref->name));
 487
 488         free_refs(fetch_map);
 489         free_refs(matches);
 490
 491         return 0;
 492 }
 493
 494 struct known_remote {
 495         struct known_remote *next;
 496         struct remote *remote;
 497 };
 498
 499 struct known_remotes {
 500         struct remote *to_delete;
 501         struct known_remote *list;
 502 };
 503
 504 static int add_known_remote(struct remote *remote, void *cb_data)
 505 {
 506         struct known_remotes *all = cb_data;
 507         struct known_remote *r;
 508
 509         if (!strcmp(all->to_delete->name, remote->name))
 510                 return 0;
 511
 512         r = xmalloc(sizeof(*r));
 513         r->remote = remote;
 514         r->next = all->list;
 515         all->list = r;
 516         return 0;
 517 }
 518
 519 struct branches_for_remote {
 520         struct remote *remote;
 521         struct string_list *branches, *skipped;
 522         struct known_remotes *keep;
 523 };
 524
 525 static int add_branch_for_removal(const char *refname,
 526         const unsigned char *sha1, int flags, void *cb_data)
 527 {
 528         struct branches_for_remote *branches = cb_data;
 529         struct refspec refspec;
 530         struct string_list_item *item;
 531         struct known_remote *kr;
 532
 533         memset(&refspec, 0, sizeof(refspec));
 534         refspec.dst = (char *)refname;
 535         if (remote_find_tracking(branches->remote, &refspec))
 536                 return 0;
 537
 538         /* don't delete a branch if another remote also uses it */
 539         for (kr = branches->keep->list; kr; kr = kr->next) {
 540                 memset(&refspec, 0, sizeof(refspec));
 541                 refspec.dst = (char *)refname;
 542                 if (!remote_find_tracking(kr->remote, &refspec))
 543                         return 0;
 544         }
 545
 546         /* don't delete non-remote-tracking refs */
 547         if (prefixcmp(refname, "refs/remotes")) {
 548                 /* advise user how to delete local branches */
 549                 if (!prefixcmp(refname, "refs/heads/"))
 550                         string_list_append(branches->skipped,
 551                                            abbrev_branch(refname));
 552                 /* silently skip over other non-remote refs */
 553                 return 0;
 554         }
 555
 556         /* make sure that symrefs are deleted */
 557         if (flags & REF_ISSYMREF)
 558                 return unlink(git_path("%s", refname));
 559
 560         item = string_list_append(branches->branches, refname);
 561         item->util = xmalloc(20);
 562         hashcpy(item->util, sha1);
 563
 564         return 0;
 565 }
 566
 567 struct rename_info {
 568         const char *old;
 569         const char *new;
 570         struct string_list *remote_branches;
 571 };
 572
 573 static int read_remote_branches(const char *refname,
 574         const unsigned char *sha1, int flags, void *cb_data)
 575 {
 576         struct rename_info *rename = cb_data;
 577         struct strbuf buf = STRBUF_INIT;
 578         struct string_list_item *item;
 579         int flag;
 580         unsigned char orig_sha1[20];
 581         const char *symref;
 582
 583         strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 584         if (!prefixcmp(refname, buf.buf)) {
 585                 item = string_list_append(rename->remote_branches, xstrdup(refname));
 586                 symref = resolve_ref(refname, orig_sha1, 1, &flag);
 587                 if (flag & REF_ISSYMREF)
 588                         item->util = xstrdup(symref);
 589                 else
 590                         item->util = NULL;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static int migrate_file(struct remote *remote)
 597 {
 598         struct strbuf buf = STRBUF_INIT;
 599         int i;
 600         char *path = NULL;
 601
 602         strbuf_addf(&buf, "remote.%s.url", remote->name);
 603         for (i = 0; i < remote->url_nr; i++)
 604                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 605                         return error("Could not append '%s' to '%s'",
 606                                         remote->url[i], buf.buf);
 607         strbuf_reset(&buf);
 608         strbuf_addf(&buf, "remote.%s.push", remote->name);
 609         for (i = 0; i < remote->push_refspec_nr; i++)
 610                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 611                         return error("Could not append '%s' to '%s'",
 612                                         remote->push_refspec[i], buf.buf);
 613         strbuf_reset(&buf);
 614         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 615         for (i = 0; i < remote->fetch_refspec_nr; i++)
 616                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 617                         return error("Could not append '%s' to '%s'",
 618                                         remote->fetch_refspec[i], buf.buf);
 619         if (remote->origin == REMOTE_REMOTES)
 620                 path = git_path("remotes/%s", remote->name);
 621         else if (remote->origin == REMOTE_BRANCHES)
 622                 path = git_path("branches/%s", remote->name);
 623         if (path)
 624                 unlink_or_warn(path);
 625         return 0;
 626 }
 627
 628 static int mv(int argc, const char **argv)
 629 {
 630         struct option options[] = {
 631                 OPT_END()
 632         };
 633         struct remote *oldremote, *newremote;
 634         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 635         struct string_list remote_branches = STRING_LIST_INIT_NODUP;
 636         struct rename_info rename;
 637         int i;
 638
 639         if (argc != 3)
 640                 usage_with_options(builtin_remote_rename_usage, options);
 641
 642         rename.old = argv[1];
 643         rename.new = argv[2];
 644         rename.remote_branches = &remote_branches;
 645
 646         oldremote = remote_get(rename.old);
 647         if (!oldremote)
 648                 die("No such remote: %s", rename.old);
 649
 650         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 651                 return migrate_file(oldremote);
 652
 653         newremote = remote_get(rename.new);
 654         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 655                 die("remote %s already exists.", rename.new);
 656
 657         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 658         if (!valid_fetch_refspec(buf.buf))
 659                 die("'%s' is not a valid remote name", rename.new);
 660
 661         strbuf_reset(&buf);
 662         strbuf_addf(&buf, "remote.%s", rename.old);
 663         strbuf_addf(&buf2, "remote.%s", rename.new);
 664         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 665                 return error("Could not rename config section '%s' to '%s'",
 666                                 buf.buf, buf2.buf);
 667
 668         strbuf_reset(&buf);
 669         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 670         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 671                 return error("Could not remove config section '%s'", buf.buf);
 672         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 673                 char *ptr;
 674
 675                 strbuf_reset(&buf2);
 676                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 677                 ptr = strstr(buf2.buf, rename.old);
 678                 if (ptr)
 679                         strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 680                                         rename.new, strlen(rename.new));
 681                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 682                         return error("Could not append '%s'", buf.buf);
 683         }
 684
 685         read_branches();
 686         for (i = 0; i < branch_list.nr; i++) {
 687                 struct string_list_item *item = branch_list.items + i;
 688                 struct branch_info *info = item->util;
 689                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 690                         strbuf_reset(&buf);
 691                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 692                         if (git_config_set(buf.buf, rename.new)) {
 693                                 return error("Could not set '%s'", buf.buf);
 694                         }
 695                 }
 696         }
 697
 698         /*
 699          * First remove symrefs, then rename the rest, finally create
 700          * the new symrefs.
 701          */
 702         for_each_ref(read_remote_branches, &rename);
 703         for (i = 0; i < remote_branches.nr; i++) {
 704                 struct string_list_item *item = remote_branches.items + i;
 705                 int flag = 0;
 706                 unsigned char sha1[20];
 707
 708                 resolve_ref(item->string, sha1, 1, &flag);
 709                 if (!(flag & REF_ISSYMREF))
 710                         continue;
 711                 if (delete_ref(item->string, NULL, REF_NODEREF))
 712                         die("deleting '%s' failed", item->string);
 713         }
 714         for (i = 0; i < remote_branches.nr; i++) {
 715                 struct string_list_item *item = remote_branches.items + i;
 716
 717                 if (item->util)
 718                         continue;
 719                 strbuf_reset(&buf);
 720                 strbuf_addstr(&buf, item->string);
 721                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 722                                 rename.new, strlen(rename.new));
 723                 strbuf_reset(&buf2);
 724                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 725                                 item->string, buf.buf);
 726                 if (rename_ref(item->string, buf.buf, buf2.buf))
 727                         die("renaming '%s' failed", item->string);
 728         }
 729         for (i = 0; i < remote_branches.nr; i++) {
 730                 struct string_list_item *item = remote_branches.items + i;
 731
 732                 if (!item->util)
 733                         continue;
 734                 strbuf_reset(&buf);
 735                 strbuf_addstr(&buf, item->string);
 736                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 737                                 rename.new, strlen(rename.new));
 738                 strbuf_reset(&buf2);
 739                 strbuf_addstr(&buf2, item->util);
 740                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 741                                 rename.new, strlen(rename.new));
 742                 strbuf_reset(&buf3);
 743                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 744                                 item->string, buf.buf);
 745                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 746                         die("creating '%s' failed", buf.buf);
 747         }
 748         return 0;
 749 }
 750
 751 static int remove_branches(struct string_list *branches)
 752 {
 753         int i, result = 0;
 754         for (i = 0; i < branches->nr; i++) {
 755                 struct string_list_item *item = branches->items + i;
 756                 const char *refname = item->string;
 757                 unsigned char *sha1 = item->util;
 758
 759                 if (delete_ref(refname, sha1, 0))
 760                         result |= error("Could not remove branch %s", refname);
 761         }
 762         return result;
 763 }
 764
 765 static int rm(int argc, const char **argv)
 766 {
 767         struct option options[] = {
 768                 OPT_END()
 769         };
 770         struct remote *remote;
 771         struct strbuf buf = STRBUF_INIT;
 772         struct known_remotes known_remotes = { NULL, NULL };
 773         struct string_list branches = STRING_LIST_INIT_DUP;
 774         struct string_list skipped = STRING_LIST_INIT_DUP;
 775         struct branches_for_remote cb_data;
 776         int i, result;
 777
 778         memset(&cb_data, 0, sizeof(cb_data));
 779         cb_data.branches = &branches;
 780         cb_data.skipped = &skipped;
 781         cb_data.keep = &known_remotes;
 782
 783         if (argc != 2)
 784                 usage_with_options(builtin_remote_rm_usage, options);
 785
 786         remote = remote_get(argv[1]);
 787         if (!remote)
 788                 die("No such remote: %s", argv[1]);
 789
 790         known_remotes.to_delete = remote;
 791         for_each_remote(add_known_remote, &known_remotes);
 792
 793         strbuf_addf(&buf, "remote.%s", remote->name);
 794         if (git_config_rename_section(buf.buf, NULL) < 1)
 795                 return error("Could not remove config section '%s'", buf.buf);
 796
 797         read_branches();
 798         for (i = 0; i < branch_list.nr; i++) {
 799                 struct string_list_item *item = branch_list.items + i;
 800                 struct branch_info *info = item->util;
 801                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 802                         const char *keys[] = { "remote", "merge", NULL }, **k;
 803                         for (k = keys; *k; k++) {
 804                                 strbuf_reset(&buf);
 805                                 strbuf_addf(&buf, "branch.%s.%s",
 806                                                 item->string, *k);
 807                                 if (git_config_set(buf.buf, NULL)) {
 808                                         strbuf_release(&buf);
 809                                         return -1;
 810                                 }
 811                         }
 812                 }
 813         }
 814
 815         /*
 816          * We cannot just pass a function to for_each_ref() which deletes
 817          * the branches one by one, since for_each_ref() relies on cached
 818          * refs, which are invalidated when deleting a branch.
 819          */
 820         cb_data.remote = remote;
 821         result = for_each_ref(add_branch_for_removal, &cb_data);
 822         strbuf_release(&buf);
 823
 824         if (!result)
 825                 result = remove_branches(&branches);
 826         string_list_clear(&branches, 1);
 827
 828         if (skipped.nr) {
 829                 fprintf(stderr, skipped.nr == 1 ?
 830                         "Note: A branch outside the refs/remotes/ hierarchy was not removed;\n"
 831                         "to delete it, use:\n" :
 832                         "Note: Some branches outside the refs/remotes/ hierarchy were not removed;\n"
 833                         "to delete them, use:\n");
 834                 for (i = 0; i < skipped.nr; i++)
 835                         fprintf(stderr, "  git branch -d %s\n",
 836                                 skipped.items[i].string);
 837         }
 838         string_list_clear(&skipped, 0);
 839
 840         return result;
 841 }
 842
 843 static void clear_push_info(void *util, const char *string)
 844 {
 845         struct push_info *info = util;
 846         free(info->dest);
 847         free(info);
 848 }
 849
 850 static void free_remote_ref_states(struct ref_states *states)
 851 {
 852         string_list_clear(&states->new, 0);
 853         string_list_clear(&states->stale, 1);
 854         string_list_clear(&states->tracked, 0);
 855         string_list_clear(&states->heads, 0);
 856         string_list_clear_func(&states->push, clear_push_info);
 857 }
 858
 859 static int append_ref_to_tracked_list(const char *refname,
 860         const unsigned char *sha1, int flags, void *cb_data)
 861 {
 862         struct ref_states *states = cb_data;
 863         struct refspec refspec;
 864
 865         if (flags & REF_ISSYMREF)
 866                 return 0;
 867
 868         memset(&refspec, 0, sizeof(refspec));
 869         refspec.dst = (char *)refname;
 870         if (!remote_find_tracking(states->remote, &refspec))
 871                 string_list_append(&states->tracked, abbrev_branch(refspec.src));
 872
 873         return 0;
 874 }
 875
 876 static int get_remote_ref_states(const char *name,
 877                                  struct ref_states *states,
 878                                  int query)
 879 {
 880         struct transport *transport;
 881         const struct ref *remote_refs;
 882
 883         states->remote = remote_get(name);
 884         if (!states->remote)
 885                 return error("No such remote: %s", name);
 886
 887         read_branches();
 888
 889         if (query) {
 890                 transport = transport_get(states->remote, states->remote->url_nr > 0 ?
 891                         states->remote->url[0] : NULL);
 892                 remote_refs = transport_get_remote_refs(transport);
 893                 transport_disconnect(transport);
 894
 895                 states->queried = 1;
 896                 if (query & GET_REF_STATES)
 897                         get_ref_states(remote_refs, states);
 898                 if (query & GET_HEAD_NAMES)
 899                         get_head_names(remote_refs, states);
 900                 if (query & GET_PUSH_REF_STATES)
 901                         get_push_ref_states(remote_refs, states);
 902         } else {
 903                 for_each_ref(append_ref_to_tracked_list, states);
 904                 sort_string_list(&states->tracked);
 905                 get_push_ref_states_noquery(states);
 906         }
 907
 908         return 0;
 909 }
 910
 911 struct show_info {
 912         struct string_list *list;
 913         struct ref_states *states;
 914         int width, width2;
 915         int any_rebase;
 916 };
 917
 918 static int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 919 {
 920         struct show_info *info = cb_data;
 921         int n = strlen(item->string);
 922         if (n > info->width)
 923                 info->width = n;
 924         string_list_insert(info->list, item->string);
 925         return 0;
 926 }
 927
 928 static int show_remote_info_item(struct string_list_item *item, void *cb_data)
 929 {
 930         struct show_info *info = cb_data;
 931         struct ref_states *states = info->states;
 932         const char *name = item->string;
 933
 934         if (states->queried) {
 935                 const char *fmt = "%s";
 936                 const char *arg = "";
 937                 if (string_list_has_string(&states->new, name)) {
 938                         fmt = " new (next fetch will store in remotes/%s)";
 939                         arg = states->remote->name;
 940                 } else if (string_list_has_string(&states->tracked, name))
 941                         arg = " tracked";
 942                 else if (string_list_has_string(&states->stale, name))
 943                         arg = " stale (use 'git remote prune' to remove)";
 944                 else
 945                         arg = " ???";
 946                 printf("    %-*s", info->width, name);
 947                 printf(fmt, arg);
 948                 printf("\n");
 949         } else
 950                 printf("    %s\n", name);
 951
 952         return 0;
 953 }
 954
 955 static int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 956 {
 957         struct show_info *show_info = cb_data;
 958         struct ref_states *states = show_info->states;
 959         struct branch_info *branch_info = branch_item->util;
 960         struct string_list_item *item;
 961         int n;
 962
 963         if (!branch_info->merge.nr || !branch_info->remote_name ||
 964             strcmp(states->remote->name, branch_info->remote_name))
 965                 return 0;
 966         if ((n = strlen(branch_item->string)) > show_info->width)
 967                 show_info->width = n;
 968         if (branch_info->rebase)
 969                 show_info->any_rebase = 1;
 970
 971         item = string_list_insert(show_info->list, branch_item->string);
 972         item->util = branch_info;
 973
 974         return 0;
 975 }
 976
 977 static int show_local_info_item(struct string_list_item *item, void *cb_data)
 978 {
 979         struct show_info *show_info = cb_data;
 980         struct branch_info *branch_info = item->util;
 981         struct string_list *merge = &branch_info->merge;
 982         const char *also;
 983         int i;
 984
 985         if (branch_info->rebase && branch_info->merge.nr > 1) {
 986                 error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
 987                         item->string);
 988                 return 0;
 989         }
 990
 991         printf("    %-*s ", show_info->width, item->string);
 992         if (branch_info->rebase) {
 993                 printf("rebases onto remote %s\n", merge->items[0].string);
 994                 return 0;
 995         } else if (show_info->any_rebase) {
 996                 printf(" merges with remote %s\n", merge->items[0].string);
 997                 also = "    and with remote";
 998         } else {
 999                 printf("merges with remote %s\n", merge->items[0].string);
1000                 also = "   and with remote";
1001         }
1002         for (i = 1; i < merge->nr; i++)
1003                 printf("    %-*s %s %s\n", show_info->width, "", also,
1004                        merge->items[i].string);
1005
1006         return 0;
1007 }
1008
1009 static int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
1010 {
1011         struct show_info *show_info = cb_data;
1012         struct push_info *push_info = push_item->util;
1013         struct string_list_item *item;
1014         int n;
1015         if ((n = strlen(push_item->string)) > show_info->width)
1016                 show_info->width = n;
1017         if ((n = strlen(push_info->dest)) > show_info->width2)
1018                 show_info->width2 = n;
1019         item = string_list_append(show_info->list, push_item->string);
1020         item->util = push_item->util;
1021         return 0;
1022 }
1023
1024 /*
1025  * Sorting comparison for a string list that has push_info
1026  * structs in its util field
1027  */
1028 static int cmp_string_with_push(const void *va, const void *vb)
1029 {
1030         const struct string_list_item *a = va;
1031         const struct string_list_item *b = vb;
1032         const struct push_info *a_push = a->util;
1033         const struct push_info *b_push = b->util;
1034         int cmp = strcmp(a->string, b->string);
1035         return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
1036 }
1037
1038 static int show_push_info_item(struct string_list_item *item, void *cb_data)
1039 {
1040         struct show_info *show_info = cb_data;
1041         struct push_info *push_info = item->util;
1042         char *src = item->string, *status = NULL;
1043
1044         switch (push_info->status) {
1045         case PUSH_STATUS_CREATE:
1046                 status = "create";
1047                 break;
1048         case PUSH_STATUS_DELETE:
1049                 status = "delete";
1050                 src = "(none)";
1051                 break;
1052         case PUSH_STATUS_UPTODATE:
1053                 status = "up to date";
1054                 break;
1055         case PUSH_STATUS_FASTFORWARD:
1056                 status = "fast-forwardable";
1057                 break;
1058         case PUSH_STATUS_OUTOFDATE:
1059                 status = "local out of date";
1060                 break;
1061         case PUSH_STATUS_NOTQUERIED:
1062                 break;
1063         }
1064         if (status)
1065                 printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
1066                         push_info->forced ? "forces" : "pushes",
1067                         show_info->width2, push_info->dest, status);
1068         else
1069                 printf("    %-*s %s to %s\n", show_info->width, src,
1070                         push_info->forced ? "forces" : "pushes",
1071                         push_info->dest);
1072         return 0;
1073 }
1074
1075 static int show(int argc, const char **argv)
1076 {
1077         int no_query = 0, result = 0, query_flag = 0;
1078         struct option options[] = {
1079                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
1080                 OPT_END()
1081         };
1082         struct ref_states states;
1083         struct string_list info_list = STRING_LIST_INIT_NODUP;
1084         struct show_info info;
1085
1086         argc = parse_options(argc, argv, NULL, options, builtin_remote_show_usage,
1087                              0);
1088
1089         if (argc < 1)
1090                 return show_all();
1091
1092         if (!no_query)
1093                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
1094
1095         memset(&states, 0, sizeof(states));
1096         memset(&info, 0, sizeof(info));
1097         info.states = &states;
1098         info.list = &info_list;
1099         for (; argc; argc--, argv++) {
1100                 int i;
1101                 const char **url;
1102                 int url_nr;
1103
1104                 get_remote_ref_states(*argv, &states, query_flag);
1105
1106                 printf("* remote %s\n", *argv);
1107                 printf("  Fetch URL: %s\n", states.remote->url_nr > 0 ?
1108                         states.remote->url[0] : "(no URL)");
1109                 if (states.remote->pushurl_nr) {
1110                         url = states.remote->pushurl;
1111                         url_nr = states.remote->pushurl_nr;
1112                 } else {
1113                         url = states.remote->url;
1114                         url_nr = states.remote->url_nr;
1115                 }
1116                 for (i=0; i < url_nr; i++)
1117                         printf("  Push  URL: %s\n", url[i]);
1118                 if (!i)
1119                         printf("  Push  URL: %s\n", "(no URL)");
1120                 if (no_query)
1121                         printf("  HEAD branch: (not queried)\n");
1122                 else if (!states.heads.nr)
1123                         printf("  HEAD branch: (unknown)\n");
1124                 else if (states.heads.nr == 1)
1125                         printf("  HEAD branch: %s\n", states.heads.items[0].string);
1126                 else {
1127                         printf("  HEAD branch (remote HEAD is ambiguous,"
1128                                " may be one of the following):\n");
1129                         for (i = 0; i < states.heads.nr; i++)
1130                                 printf("    %s\n", states.heads.items[i].string);
1131                 }
1132
1133                 /* remote branch info */
1134                 info.width = 0;
1135                 for_each_string_list(&states.new, add_remote_to_show_info, &info);
1136                 for_each_string_list(&states.tracked, add_remote_to_show_info, &info);
1137                 for_each_string_list(&states.stale, add_remote_to_show_info, &info);
1138                 if (info.list->nr)
1139                         printf("  Remote branch%s:%s\n",
1140                                info.list->nr > 1 ? "es" : "",
1141                                 no_query ? " (status not queried)" : "");
1142                 for_each_string_list(info.list, show_remote_info_item, &info);
1143                 string_list_clear(info.list, 0);
1144
1145                 /* git pull info */
1146                 info.width = 0;
1147                 info.any_rebase = 0;
1148                 for_each_string_list(&branch_list, add_local_to_show_info, &info);
1149                 if (info.list->nr)
1150                         printf("  Local branch%s configured for 'git pull':\n",
1151                                info.list->nr > 1 ? "es" : "");
1152                 for_each_string_list(info.list, show_local_info_item, &info);
1153                 string_list_clear(info.list, 0);
1154
1155                 /* git push info */
1156                 if (states.remote->mirror)
1157                         printf("  Local refs will be mirrored by 'git push'\n");
1158
1159                 info.width = info.width2 = 0;
1160                 for_each_string_list(&states.push, add_push_to_show_info, &info);
1161                 qsort(info.list->items, info.list->nr,
1162                         sizeof(*info.list->items), cmp_string_with_push);
1163                 if (info.list->nr)
1164                         printf("  Local ref%s configured for 'git push'%s:\n",
1165                                 info.list->nr > 1 ? "s" : "",
1166                                 no_query ? " (status not queried)" : "");
1167                 for_each_string_list(info.list, show_push_info_item, &info);
1168                 string_list_clear(info.list, 0);
1169
1170                 free_remote_ref_states(&states);
1171         }
1172
1173         return result;
1174 }
1175
1176 static int set_head(int argc, const char **argv)
1177 {
1178         int i, opt_a = 0, opt_d = 0, result = 0;
1179         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1180         char *head_name = NULL;
1181
1182         struct option options[] = {
1183                 OPT_BOOLEAN('a', "auto", &opt_a,
1184                             "set refs/remotes/<name>/HEAD according to remote"),
1185                 OPT_BOOLEAN('d', "delete", &opt_d,
1186                             "delete refs/remotes/<name>/HEAD"),
1187                 OPT_END()
1188         };
1189         argc = parse_options(argc, argv, NULL, options, builtin_remote_sethead_usage,
1190                              0);
1191         if (argc)
1192                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1193
1194         if (!opt_a && !opt_d && argc == 2) {
1195                 head_name = xstrdup(argv[1]);
1196         } else if (opt_a && !opt_d && argc == 1) {
1197                 struct ref_states states;
1198                 memset(&states, 0, sizeof(states));
1199                 get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1200                 if (!states.heads.nr)
1201                         result |= error("Cannot determine remote HEAD");
1202                 else if (states.heads.nr > 1) {
1203                         result |= error("Multiple remote HEAD branches. "
1204                                         "Please choose one explicitly with:");
1205                         for (i = 0; i < states.heads.nr; i++)
1206                                 fprintf(stderr, "  git remote set-head %s %s\n",
1207                                         argv[0], states.heads.items[i].string);
1208                 } else
1209                         head_name = xstrdup(states.heads.items[0].string);
1210                 free_remote_ref_states(&states);
1211         } else if (opt_d && !opt_a && argc == 1) {
1212                 if (delete_ref(buf.buf, NULL, REF_NODEREF))
1213                         result |= error("Could not delete %s", buf.buf);
1214         } else
1215                 usage_with_options(builtin_remote_sethead_usage, options);
1216
1217         if (head_name) {
1218                 unsigned char sha1[20];
1219                 strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1220                 /* make sure it's valid */
1221                 if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1222                         result |= error("Not a valid ref: %s", buf2.buf);
1223                 else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1224                         result |= error("Could not setup %s", buf.buf);
1225                 if (opt_a)
1226                         printf("%s/HEAD set to %s\n", argv[0], head_name);
1227                 free(head_name);
1228         }
1229
1230         strbuf_release(&buf);
1231         strbuf_release(&buf2);
1232         return result;
1233 }
1234
1235 static int prune(int argc, const char **argv)
1236 {
1237         int dry_run = 0, result = 0;
1238         struct option options[] = {
1239                 OPT__DRY_RUN(&dry_run, "dry run"),
1240                 OPT_END()
1241         };
1242
1243         argc = parse_options(argc, argv, NULL, options, builtin_remote_prune_usage,
1244                              0);
1245
1246         if (argc < 1)
1247                 usage_with_options(builtin_remote_prune_usage, options);
1248
1249         for (; argc; argc--, argv++)
1250                 result |= prune_remote(*argv, dry_run);
1251
1252         return result;
1253 }
1254
1255 static int prune_remote(const char *remote, int dry_run)
1256 {
1257         int result = 0, i;
1258         struct ref_states states;
1259         const char *dangling_msg = dry_run
1260                 ? " %s will become dangling!\n"
1261                 : " %s has become dangling!\n";
1262
1263         memset(&states, 0, sizeof(states));
1264         get_remote_ref_states(remote, &states, GET_REF_STATES);
1265
1266         if (states.stale.nr) {
1267                 printf("Pruning %s\n", remote);
1268                 printf("URL: %s\n",
1269                        states.remote->url_nr
1270                        ? states.remote->url[0]
1271                        : "(no URL)");
1272         }
1273
1274         for (i = 0; i < states.stale.nr; i++) {
1275                 const char *refname = states.stale.items[i].util;
1276
1277                 if (!dry_run)
1278                         result |= delete_ref(refname, NULL, 0);
1279
1280                 printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1281                        abbrev_ref(refname, "refs/remotes/"));
1282                 warn_dangling_symref(stdout, dangling_msg, refname);
1283         }
1284
1285         free_remote_ref_states(&states);
1286         return result;
1287 }
1288
1289 static int get_remote_default(const char *key, const char *value, void *priv)
1290 {
1291         if (strcmp(key, "remotes.default") == 0) {
1292                 int *found = priv;
1293                 *found = 1;
1294         }
1295         return 0;
1296 }
1297
1298 static int update(int argc, const char **argv)
1299 {
1300         int i, prune = 0;
1301         struct option options[] = {
1302                 OPT_BOOLEAN('p', "prune", &prune,
1303                             "prune remotes after fetching"),
1304                 OPT_END()
1305         };
1306         const char **fetch_argv;
1307         int fetch_argc = 0;
1308         int default_defined = 0;
1309
1310         fetch_argv = xmalloc(sizeof(char *) * (argc+5));
1311
1312         argc = parse_options(argc, argv, NULL, options, builtin_remote_update_usage,
1313                              PARSE_OPT_KEEP_ARGV0);
1314
1315         fetch_argv[fetch_argc++] = "fetch";
1316
1317         if (prune)
1318                 fetch_argv[fetch_argc++] = "--prune";
1319         if (verbose)
1320                 fetch_argv[fetch_argc++] = "-v";
1321         fetch_argv[fetch_argc++] = "--multiple";
1322         if (argc < 2)
1323                 fetch_argv[fetch_argc++] = "default";
1324         for (i = 1; i < argc; i++)
1325                 fetch_argv[fetch_argc++] = argv[i];
1326
1327         if (strcmp(fetch_argv[fetch_argc-1], "default") == 0) {
1328                 git_config(get_remote_default, &default_defined);
1329                 if (!default_defined)
1330                         fetch_argv[fetch_argc-1] = "--all";
1331         }
1332
1333         fetch_argv[fetch_argc] = NULL;
1334
1335         return run_command_v_opt(fetch_argv, RUN_GIT_CMD);
1336 }
1337
1338 static int remove_all_fetch_refspecs(const char *remote, const char *key)
1339 {
1340         return git_config_set_multivar(key, NULL, NULL, 1);
1341 }
1342
1343 static int add_branches(struct remote *remote, const char **branches,
1344                         const char *key)
1345 {
1346         const char *remotename = remote->name;
1347         int mirror = remote->mirror;
1348         struct strbuf refspec = STRBUF_INIT;
1349
1350         for (; *branches; branches++)
1351                 if (add_branch(key, *branches, remotename, mirror, &refspec)) {
1352                         strbuf_release(&refspec);
1353                         return 1;
1354                 }
1355
1356         strbuf_release(&refspec);
1357         return 0;
1358 }
1359
1360 static int set_remote_branches(const char *remotename, const char **branches,
1361                                 int add_mode)
1362 {
1363         struct strbuf key = STRBUF_INIT;
1364         struct remote *remote;
1365
1366         strbuf_addf(&key, "remote.%s.fetch", remotename);
1367
1368         if (!remote_is_configured(remotename))
1369                 die("No such remote '%s'", remotename);
1370         remote = remote_get(remotename);
1371
1372         if (!add_mode && remove_all_fetch_refspecs(remotename, key.buf)) {
1373                 strbuf_release(&key);
1374                 return 1;
1375         }
1376         if (add_branches(remote, branches, key.buf)) {
1377                 strbuf_release(&key);
1378                 return 1;
1379         }
1380
1381         strbuf_release(&key);
1382         return 0;
1383 }
1384
1385 static int set_branches(int argc, const char **argv)
1386 {
1387         int add_mode = 0;
1388         struct option options[] = {
1389                 OPT_BOOLEAN('\0', "add", &add_mode, "add branch"),
1390                 OPT_END()
1391         };
1392
1393         argc = parse_options(argc, argv, NULL, options,
1394                              builtin_remote_setbranches_usage, 0);
1395         if (argc == 0) {
1396                 error("no remote specified");
1397                 usage_with_options(builtin_remote_seturl_usage, options);
1398         }
1399         argv[argc] = NULL;
1400
1401         return set_remote_branches(argv[0], argv + 1, add_mode);
1402 }
1403
1404 static int set_url(int argc, const char **argv)
1405 {
1406         int i, push_mode = 0, add_mode = 0, delete_mode = 0;
1407         int matches = 0, negative_matches = 0;
1408         const char *remotename = NULL;
1409         const char *newurl = NULL;
1410         const char *oldurl = NULL;
1411         struct remote *remote;
1412         regex_t old_regex;
1413         const char **urlset;
1414         int urlset_nr;
1415         struct strbuf name_buf = STRBUF_INIT;
1416         struct option options[] = {
1417                 OPT_BOOLEAN('\0', "push", &push_mode,
1418                             "manipulate push URLs"),
1419                 OPT_BOOLEAN('\0', "add", &add_mode,
1420                             "add URL"),
1421                 OPT_BOOLEAN('\0', "delete", &delete_mode,
1422                             "delete URLs"),
1423                 OPT_END()
1424         };
1425         argc = parse_options(argc, argv, NULL, options, builtin_remote_update_usage,
1426                              PARSE_OPT_KEEP_ARGV0);
1427
1428         if (add_mode && delete_mode)
1429                 die("--add --delete doesn't make sense");
1430
1431         if (argc < 3 || argc > 4 || ((add_mode || delete_mode) && argc != 3))
1432                 usage_with_options(builtin_remote_seturl_usage, options);
1433
1434         remotename = argv[1];
1435         newurl = argv[2];
1436         if (argc > 3)
1437                 oldurl = argv[3];
1438
1439         if (delete_mode)
1440                 oldurl = newurl;
1441
1442         if (!remote_is_configured(remotename))
1443                 die("No such remote '%s'", remotename);
1444         remote = remote_get(remotename);
1445
1446         if (push_mode) {
1447                 strbuf_addf(&name_buf, "remote.%s.pushurl", remotename);
1448                 urlset = remote->pushurl;
1449                 urlset_nr = remote->pushurl_nr;
1450         } else {
1451                 strbuf_addf(&name_buf, "remote.%s.url", remotename);
1452                 urlset = remote->url;
1453                 urlset_nr = remote->url_nr;
1454         }
1455
1456         /* Special cases that add new entry. */
1457         if ((!oldurl && !delete_mode) || add_mode) {
1458                 if (add_mode)
1459                         git_config_set_multivar(name_buf.buf, newurl,
1460                                 "^$", 0);
1461                 else
1462                         git_config_set(name_buf.buf, newurl);
1463                 strbuf_release(&name_buf);
1464                 return 0;
1465         }
1466
1467         /* Old URL specified. Demand that one matches. */
1468         if (regcomp(&old_regex, oldurl, REG_EXTENDED))
1469                 die("Invalid old URL pattern: %s", oldurl);
1470
1471         for (i = 0; i < urlset_nr; i++)
1472                 if (!regexec(&old_regex, urlset[i], 0, NULL, 0))
1473                         matches++;
1474                 else
1475                         negative_matches++;
1476         if (!delete_mode && !matches)
1477                 die("No such URL found: %s", oldurl);
1478         if (delete_mode && !negative_matches && !push_mode)
1479                 die("Will not delete all non-push URLs");
1480
1481         regfree(&old_regex);
1482
1483         if (!delete_mode)
1484                 git_config_set_multivar(name_buf.buf, newurl, oldurl, 0);
1485         else
1486                 git_config_set_multivar(name_buf.buf, NULL, oldurl, 1);
1487         return 0;
1488 }
1489
1490 static int get_one_entry(struct remote *remote, void *priv)
1491 {
1492         struct string_list *list = priv;
1493         struct strbuf url_buf = STRBUF_INIT;
1494         const char **url;
1495         int i, url_nr;
1496
1497         if (remote->url_nr > 0) {
1498                 strbuf_addf(&url_buf, "%s (fetch)", remote->url[0]);
1499                 string_list_append(list, remote->name)->util =
1500                                 strbuf_detach(&url_buf, NULL);
1501         } else
1502                 string_list_append(list, remote->name)->util = NULL;
1503         if (remote->pushurl_nr) {
1504                 url = remote->pushurl;
1505                 url_nr = remote->pushurl_nr;
1506         } else {
1507                 url = remote->url;
1508                 url_nr = remote->url_nr;
1509         }
1510         for (i = 0; i < url_nr; i++)
1511         {
1512                 strbuf_addf(&url_buf, "%s (push)", url[i]);
1513                 string_list_append(list, remote->name)->util =
1514                                 strbuf_detach(&url_buf, NULL);
1515         }
1516
1517         return 0;
1518 }
1519
1520 static int show_all(void)
1521 {
1522         struct string_list list = STRING_LIST_INIT_NODUP;
1523         int result;
1524
1525         list.strdup_strings = 1;
1526         result = for_each_remote(get_one_entry, &list);
1527
1528         if (!result) {
1529                 int i;
1530
1531                 sort_string_list(&list);
1532                 for (i = 0; i < list.nr; i++) {
1533                         struct string_list_item *item = list.items + i;
1534                         if (verbose)
1535                                 printf("%s\t%s\n", item->string,
1536                                         item->util ? (const char *)item->util : "");
1537                         else {
1538                                 if (i && !strcmp((item - 1)->string, item->string))
1539                                         continue;
1540                                 printf("%s\n", item->string);
1541                         }
1542                 }
1543         }
1544         string_list_clear(&list, 1);
1545         return result;
1546 }
1547
1548 int cmd_remote(int argc, const char **argv, const char *prefix)
1549 {
1550         struct option options[] = {
1551                 OPT__VERBOSE(&verbose, "be verbose; must be placed before a subcommand"),
1552                 OPT_END()
1553         };
1554         int result;
1555
1556         argc = parse_options(argc, argv, prefix, options, builtin_remote_usage,
1557                 PARSE_OPT_STOP_AT_NON_OPTION);
1558
1559         if (argc < 1)
1560                 result = show_all();
1561         else if (!strcmp(argv[0], "add"))
1562                 result = add(argc, argv);
1563         else if (!strcmp(argv[0], "rename"))
1564                 result = mv(argc, argv);
1565         else if (!strcmp(argv[0], "rm"))
1566                 result = rm(argc, argv);
1567         else if (!strcmp(argv[0], "set-head"))
1568                 result = set_head(argc, argv);
1569         else if (!strcmp(argv[0], "set-branches"))
1570                 result = set_branches(argc, argv);
1571         else if (!strcmp(argv[0], "set-url"))
1572                 result = set_url(argc, argv);
1573         else if (!strcmp(argv[0], "show"))
1574                 result = show(argc, argv);
1575         else if (!strcmp(argv[0], "prune"))
1576                 result = prune(argc, argv);
1577         else if (!strcmp(argv[0], "update"))
1578                 result = update(argc, argv);
1579         else {
1580                 error("Unknown subcommand: %s", argv[0]);
1581                 usage_with_options(builtin_remote_usage, options);
1582         }
1583
1584         return result ? 1 : 0;
1585 }