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                 old_remote_context = STRBUF_INIT;
 636         struct string_list remote_branches = STRING_LIST_INIT_NODUP;
 637         struct rename_info rename;
 638         int i, refspec_updated = 0;
 639
 640         if (argc != 3)
 641                 usage_with_options(builtin_remote_rename_usage, options);
 642
 643         rename.old = argv[1];
 644         rename.new = argv[2];
 645         rename.remote_branches = &remote_branches;
 646
 647         oldremote = remote_get(rename.old);
 648         if (!oldremote)
 649                 die("No such remote: %s", rename.old);
 650
 651         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 652                 return migrate_file(oldremote);
 653
 654         newremote = remote_get(rename.new);
 655         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 656                 die("remote %s already exists.", rename.new);
 657
 658         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 659         if (!valid_fetch_refspec(buf.buf))
 660                 die("'%s' is not a valid remote name", rename.new);
 661
 662         strbuf_reset(&buf);
 663         strbuf_addf(&buf, "remote.%s", rename.old);
 664         strbuf_addf(&buf2, "remote.%s", rename.new);
 665         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 666                 return error("Could not rename config section '%s' to '%s'",
 667                                 buf.buf, buf2.buf);
 668
 669         strbuf_reset(&buf);
 670         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 671         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 672                 return error("Could not remove config section '%s'", buf.buf);
 673         strbuf_addf(&old_remote_context, ":refs/remotes/%s/", rename.old);
 674         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 675                 char *ptr;
 676
 677                 strbuf_reset(&buf2);
 678                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 679                 ptr = strstr(buf2.buf, old_remote_context.buf);
 680                 if (ptr) {
 681                         refspec_updated = 1;
 682                         strbuf_splice(&buf2,
 683                                       ptr-buf2.buf + strlen(":refs/remotes/"),
 684                                       strlen(rename.old), rename.new,
 685                                       strlen(rename.new));
 686                 } else
 687                         warning("Not updating non-default fetch respec\n"
 688                                 "\t%s\n"
 689                                 "\tPlease update the configuration manually if necessary.",
 690                                 buf2.buf);
 691
 692                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 693                         return error("Could not append '%s'", buf.buf);
 694         }
 695
 696         read_branches();
 697         for (i = 0; i < branch_list.nr; i++) {
 698                 struct string_list_item *item = branch_list.items + i;
 699                 struct branch_info *info = item->util;
 700                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 701                         strbuf_reset(&buf);
 702                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 703                         if (git_config_set(buf.buf, rename.new)) {
 704                                 return error("Could not set '%s'", buf.buf);
 705                         }
 706                 }
 707         }
 708
 709         if (!refspec_updated)
 710                 return 0;
 711
 712         /*
 713          * First remove symrefs, then rename the rest, finally create
 714          * the new symrefs.
 715          */
 716         for_each_ref(read_remote_branches, &rename);
 717         for (i = 0; i < remote_branches.nr; i++) {
 718                 struct string_list_item *item = remote_branches.items + i;
 719                 int flag = 0;
 720                 unsigned char sha1[20];
 721
 722                 resolve_ref(item->string, sha1, 1, &flag);
 723                 if (!(flag & REF_ISSYMREF))
 724                         continue;
 725                 if (delete_ref(item->string, NULL, REF_NODEREF))
 726                         die("deleting '%s' failed", item->string);
 727         }
 728         for (i = 0; i < remote_branches.nr; i++) {
 729                 struct string_list_item *item = remote_branches.items + i;
 730
 731                 if (item->util)
 732                         continue;
 733                 strbuf_reset(&buf);
 734                 strbuf_addstr(&buf, item->string);
 735                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 736                                 rename.new, strlen(rename.new));
 737                 strbuf_reset(&buf2);
 738                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 739                                 item->string, buf.buf);
 740                 if (rename_ref(item->string, buf.buf, buf2.buf))
 741                         die("renaming '%s' failed", item->string);
 742         }
 743         for (i = 0; i < remote_branches.nr; i++) {
 744                 struct string_list_item *item = remote_branches.items + i;
 745
 746                 if (!item->util)
 747                         continue;
 748                 strbuf_reset(&buf);
 749                 strbuf_addstr(&buf, item->string);
 750                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 751                                 rename.new, strlen(rename.new));
 752                 strbuf_reset(&buf2);
 753                 strbuf_addstr(&buf2, item->util);
 754                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 755                                 rename.new, strlen(rename.new));
 756                 strbuf_reset(&buf3);
 757                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 758                                 item->string, buf.buf);
 759                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 760                         die("creating '%s' failed", buf.buf);
 761         }
 762         return 0;
 763 }
 764
 765 static int remove_branches(struct string_list *branches)
 766 {
 767         int i, result = 0;
 768         for (i = 0; i < branches->nr; i++) {
 769                 struct string_list_item *item = branches->items + i;
 770                 const char *refname = item->string;
 771                 unsigned char *sha1 = item->util;
 772
 773                 if (delete_ref(refname, sha1, 0))
 774                         result |= error("Could not remove branch %s", refname);
 775         }
 776         return result;
 777 }
 778
 779 static int rm(int argc, const char **argv)
 780 {
 781         struct option options[] = {
 782                 OPT_END()
 783         };
 784         struct remote *remote;
 785         struct strbuf buf = STRBUF_INIT;
 786         struct known_remotes known_remotes = { NULL, NULL };
 787         struct string_list branches = STRING_LIST_INIT_DUP;
 788         struct string_list skipped = STRING_LIST_INIT_DUP;
 789         struct branches_for_remote cb_data;
 790         int i, result;
 791
 792         memset(&cb_data, 0, sizeof(cb_data));
 793         cb_data.branches = &branches;
 794         cb_data.skipped = &skipped;
 795         cb_data.keep = &known_remotes;
 796
 797         if (argc != 2)
 798                 usage_with_options(builtin_remote_rm_usage, options);
 799
 800         remote = remote_get(argv[1]);
 801         if (!remote)
 802                 die("No such remote: %s", argv[1]);
 803
 804         known_remotes.to_delete = remote;
 805         for_each_remote(add_known_remote, &known_remotes);
 806
 807         strbuf_addf(&buf, "remote.%s", remote->name);
 808         if (git_config_rename_section(buf.buf, NULL) < 1)
 809                 return error("Could not remove config section '%s'", buf.buf);
 810
 811         read_branches();
 812         for (i = 0; i < branch_list.nr; i++) {
 813                 struct string_list_item *item = branch_list.items + i;
 814                 struct branch_info *info = item->util;
 815                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 816                         const char *keys[] = { "remote", "merge", NULL }, **k;
 817                         for (k = keys; *k; k++) {
 818                                 strbuf_reset(&buf);
 819                                 strbuf_addf(&buf, "branch.%s.%s",
 820                                                 item->string, *k);
 821                                 if (git_config_set(buf.buf, NULL)) {
 822                                         strbuf_release(&buf);
 823                                         return -1;
 824                                 }
 825                         }
 826                 }
 827         }
 828
 829         /*
 830          * We cannot just pass a function to for_each_ref() which deletes
 831          * the branches one by one, since for_each_ref() relies on cached
 832          * refs, which are invalidated when deleting a branch.
 833          */
 834         cb_data.remote = remote;
 835         result = for_each_ref(add_branch_for_removal, &cb_data);
 836         strbuf_release(&buf);
 837
 838         if (!result)
 839                 result = remove_branches(&branches);
 840         string_list_clear(&branches, 1);
 841
 842         if (skipped.nr) {
 843                 fprintf(stderr, skipped.nr == 1 ?
 844                         "Note: A branch outside the refs/remotes/ hierarchy was not removed;\n"
 845                         "to delete it, use:\n" :
 846                         "Note: Some branches outside the refs/remotes/ hierarchy were not removed;\n"
 847                         "to delete them, use:\n");
 848                 for (i = 0; i < skipped.nr; i++)
 849                         fprintf(stderr, "  git branch -d %s\n",
 850                                 skipped.items[i].string);
 851         }
 852         string_list_clear(&skipped, 0);
 853
 854         return result;
 855 }
 856
 857 static void clear_push_info(void *util, const char *string)
 858 {
 859         struct push_info *info = util;
 860         free(info->dest);
 861         free(info);
 862 }
 863
 864 static void free_remote_ref_states(struct ref_states *states)
 865 {
 866         string_list_clear(&states->new, 0);
 867         string_list_clear(&states->stale, 1);
 868         string_list_clear(&states->tracked, 0);
 869         string_list_clear(&states->heads, 0);
 870         string_list_clear_func(&states->push, clear_push_info);
 871 }
 872
 873 static int append_ref_to_tracked_list(const char *refname,
 874         const unsigned char *sha1, int flags, void *cb_data)
 875 {
 876         struct ref_states *states = cb_data;
 877         struct refspec refspec;
 878
 879         if (flags & REF_ISSYMREF)
 880                 return 0;
 881
 882         memset(&refspec, 0, sizeof(refspec));
 883         refspec.dst = (char *)refname;
 884         if (!remote_find_tracking(states->remote, &refspec))
 885                 string_list_append(&states->tracked, abbrev_branch(refspec.src));
 886
 887         return 0;
 888 }
 889
 890 static int get_remote_ref_states(const char *name,
 891                                  struct ref_states *states,
 892                                  int query)
 893 {
 894         struct transport *transport;
 895         const struct ref *remote_refs;
 896
 897         states->remote = remote_get(name);
 898         if (!states->remote)
 899                 return error("No such remote: %s", name);
 900
 901         read_branches();
 902
 903         if (query) {
 904                 transport = transport_get(states->remote, states->remote->url_nr > 0 ?
 905                         states->remote->url[0] : NULL);
 906                 remote_refs = transport_get_remote_refs(transport);
 907                 transport_disconnect(transport);
 908
 909                 states->queried = 1;
 910                 if (query & GET_REF_STATES)
 911                         get_ref_states(remote_refs, states);
 912                 if (query & GET_HEAD_NAMES)
 913                         get_head_names(remote_refs, states);
 914                 if (query & GET_PUSH_REF_STATES)
 915                         get_push_ref_states(remote_refs, states);
 916         } else {
 917                 for_each_ref(append_ref_to_tracked_list, states);
 918                 sort_string_list(&states->tracked);
 919                 get_push_ref_states_noquery(states);
 920         }
 921
 922         return 0;
 923 }
 924
 925 struct show_info {
 926         struct string_list *list;
 927         struct ref_states *states;
 928         int width, width2;
 929         int any_rebase;
 930 };
 931
 932 static int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 933 {
 934         struct show_info *info = cb_data;
 935         int n = strlen(item->string);
 936         if (n > info->width)
 937                 info->width = n;
 938         string_list_insert(info->list, item->string);
 939         return 0;
 940 }
 941
 942 static int show_remote_info_item(struct string_list_item *item, void *cb_data)
 943 {
 944         struct show_info *info = cb_data;
 945         struct ref_states *states = info->states;
 946         const char *name = item->string;
 947
 948         if (states->queried) {
 949                 const char *fmt = "%s";
 950                 const char *arg = "";
 951                 if (string_list_has_string(&states->new, name)) {
 952                         fmt = " new (next fetch will store in remotes/%s)";
 953                         arg = states->remote->name;
 954                 } else if (string_list_has_string(&states->tracked, name))
 955                         arg = " tracked";
 956                 else if (string_list_has_string(&states->stale, name))
 957                         arg = " stale (use 'git remote prune' to remove)";
 958                 else
 959                         arg = " ???";
 960                 printf("    %-*s", info->width, name);
 961                 printf(fmt, arg);
 962                 printf("\n");
 963         } else
 964                 printf("    %s\n", name);
 965
 966         return 0;
 967 }
 968
 969 static int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 970 {
 971         struct show_info *show_info = cb_data;
 972         struct ref_states *states = show_info->states;
 973         struct branch_info *branch_info = branch_item->util;
 974         struct string_list_item *item;
 975         int n;
 976
 977         if (!branch_info->merge.nr || !branch_info->remote_name ||
 978             strcmp(states->remote->name, branch_info->remote_name))
 979                 return 0;
 980         if ((n = strlen(branch_item->string)) > show_info->width)
 981                 show_info->width = n;
 982         if (branch_info->rebase)
 983                 show_info->any_rebase = 1;
 984
 985         item = string_list_insert(show_info->list, branch_item->string);
 986         item->util = branch_info;
 987
 988         return 0;
 989 }
 990
 991 static int show_local_info_item(struct string_list_item *item, void *cb_data)
 992 {
 993         struct show_info *show_info = cb_data;
 994         struct branch_info *branch_info = item->util;
 995         struct string_list *merge = &branch_info->merge;
 996         const char *also;
 997         int i;
 998
 999         if (branch_info->rebase && branch_info->merge.nr > 1) {
1000                 error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
1001                         item->string);
1002                 return 0;
1003         }
1004
1005         printf("    %-*s ", show_info->width, item->string);
1006         if (branch_info->rebase) {
1007                 printf("rebases onto remote %s\n", merge->items[0].string);
1008                 return 0;
1009         } else if (show_info->any_rebase) {
1010                 printf(" merges with remote %s\n", merge->items[0].string);
1011                 also = "    and with remote";
1012         } else {
1013                 printf("merges with remote %s\n", merge->items[0].string);
1014                 also = "   and with remote";
1015         }
1016         for (i = 1; i < merge->nr; i++)
1017                 printf("    %-*s %s %s\n", show_info->width, "", also,
1018                        merge->items[i].string);
1019
1020         return 0;
1021 }
1022
1023 static int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
1024 {
1025         struct show_info *show_info = cb_data;
1026         struct push_info *push_info = push_item->util;
1027         struct string_list_item *item;
1028         int n;
1029         if ((n = strlen(push_item->string)) > show_info->width)
1030                 show_info->width = n;
1031         if ((n = strlen(push_info->dest)) > show_info->width2)
1032                 show_info->width2 = n;
1033         item = string_list_append(show_info->list, push_item->string);
1034         item->util = push_item->util;
1035         return 0;
1036 }
1037
1038 /*
1039  * Sorting comparison for a string list that has push_info
1040  * structs in its util field
1041  */
1042 static int cmp_string_with_push(const void *va, const void *vb)
1043 {
1044         const struct string_list_item *a = va;
1045         const struct string_list_item *b = vb;
1046         const struct push_info *a_push = a->util;
1047         const struct push_info *b_push = b->util;
1048         int cmp = strcmp(a->string, b->string);
1049         return cmp ? cmp : strcmp(a_push->dest, b_push->dest);
1050 }
1051
1052 static int show_push_info_item(struct string_list_item *item, void *cb_data)
1053 {
1054         struct show_info *show_info = cb_data;
1055         struct push_info *push_info = item->util;
1056         char *src = item->string, *status = NULL;
1057
1058         switch (push_info->status) {
1059         case PUSH_STATUS_CREATE:
1060                 status = "create";
1061                 break;
1062         case PUSH_STATUS_DELETE:
1063                 status = "delete";
1064                 src = "(none)";
1065                 break;
1066         case PUSH_STATUS_UPTODATE:
1067                 status = "up to date";
1068                 break;
1069         case PUSH_STATUS_FASTFORWARD:
1070                 status = "fast-forwardable";
1071                 break;
1072         case PUSH_STATUS_OUTOFDATE:
1073                 status = "local out of date";
1074                 break;
1075         case PUSH_STATUS_NOTQUERIED:
1076                 break;
1077         }
1078         if (status)
1079                 printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
1080                         push_info->forced ? "forces" : "pushes",
1081                         show_info->width2, push_info->dest, status);
1082         else
1083                 printf("    %-*s %s to %s\n", show_info->width, src,
1084                         push_info->forced ? "forces" : "pushes",
1085                         push_info->dest);
1086         return 0;
1087 }
1088
1089 static int show(int argc, const char **argv)
1090 {
1091         int no_query = 0, result = 0, query_flag = 0;
1092         struct option options[] = {
1093                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
1094                 OPT_END()
1095         };
1096         struct ref_states states;
1097         struct string_list info_list = STRING_LIST_INIT_NODUP;
1098         struct show_info info;
1099
1100         argc = parse_options(argc, argv, NULL, options, builtin_remote_show_usage,
1101                              0);
1102
1103         if (argc < 1)
1104                 return show_all();
1105
1106         if (!no_query)
1107                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
1108
1109         memset(&states, 0, sizeof(states));
1110         memset(&info, 0, sizeof(info));
1111         info.states = &states;
1112         info.list = &info_list;
1113         for (; argc; argc--, argv++) {
1114                 int i;
1115                 const char **url;
1116                 int url_nr;
1117
1118                 get_remote_ref_states(*argv, &states, query_flag);
1119
1120                 printf("* remote %s\n", *argv);
1121                 printf("  Fetch URL: %s\n", states.remote->url_nr > 0 ?
1122                         states.remote->url[0] : "(no URL)");
1123                 if (states.remote->pushurl_nr) {
1124                         url = states.remote->pushurl;
1125                         url_nr = states.remote->pushurl_nr;
1126                 } else {
1127                         url = states.remote->url;
1128                         url_nr = states.remote->url_nr;
1129                 }
1130                 for (i = 0; i < url_nr; i++)
1131                         printf("  Push  URL: %s\n", url[i]);
1132                 if (!i)
1133                         printf("  Push  URL: %s\n", "(no URL)");
1134                 if (no_query)
1135                         printf("  HEAD branch: (not queried)\n");
1136                 else if (!states.heads.nr)
1137                         printf("  HEAD branch: (unknown)\n");
1138                 else if (states.heads.nr == 1)
1139                         printf("  HEAD branch: %s\n", states.heads.items[0].string);
1140                 else {
1141                         printf("  HEAD branch (remote HEAD is ambiguous,"
1142                                " may be one of the following):\n");
1143                         for (i = 0; i < states.heads.nr; i++)
1144                                 printf("    %s\n", states.heads.items[i].string);
1145                 }
1146
1147                 /* remote branch info */
1148                 info.width = 0;
1149                 for_each_string_list(&states.new, add_remote_to_show_info, &info);
1150                 for_each_string_list(&states.tracked, add_remote_to_show_info, &info);
1151                 for_each_string_list(&states.stale, add_remote_to_show_info, &info);
1152                 if (info.list->nr)
1153                         printf("  Remote branch%s:%s\n",
1154                                info.list->nr > 1 ? "es" : "",
1155                                 no_query ? " (status not queried)" : "");
1156                 for_each_string_list(info.list, show_remote_info_item, &info);
1157                 string_list_clear(info.list, 0);
1158
1159                 /* git pull info */
1160                 info.width = 0;
1161                 info.any_rebase = 0;
1162                 for_each_string_list(&branch_list, add_local_to_show_info, &info);
1163                 if (info.list->nr)
1164                         printf("  Local branch%s configured for 'git pull':\n",
1165                                info.list->nr > 1 ? "es" : "");
1166                 for_each_string_list(info.list, show_local_info_item, &info);
1167                 string_list_clear(info.list, 0);
1168
1169                 /* git push info */
1170                 if (states.remote->mirror)
1171                         printf("  Local refs will be mirrored by 'git push'\n");
1172
1173                 info.width = info.width2 = 0;
1174                 for_each_string_list(&states.push, add_push_to_show_info, &info);
1175                 qsort(info.list->items, info.list->nr,
1176                         sizeof(*info.list->items), cmp_string_with_push);
1177                 if (info.list->nr)
1178                         printf("  Local ref%s configured for 'git push'%s:\n",
1179                                 info.list->nr > 1 ? "s" : "",
1180                                 no_query ? " (status not queried)" : "");
1181                 for_each_string_list(info.list, show_push_info_item, &info);
1182                 string_list_clear(info.list, 0);
1183
1184                 free_remote_ref_states(&states);
1185         }
1186
1187         return result;
1188 }
1189
1190 static int set_head(int argc, const char **argv)
1191 {
1192         int i, opt_a = 0, opt_d = 0, result = 0;
1193         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1194         char *head_name = NULL;
1195
1196         struct option options[] = {
1197                 OPT_BOOLEAN('a', "auto", &opt_a,
1198                             "set refs/remotes/<name>/HEAD according to remote"),
1199                 OPT_BOOLEAN('d', "delete", &opt_d,
1200                             "delete refs/remotes/<name>/HEAD"),
1201                 OPT_END()
1202         };
1203         argc = parse_options(argc, argv, NULL, options, builtin_remote_sethead_usage,
1204                              0);
1205         if (argc)
1206                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1207
1208         if (!opt_a && !opt_d && argc == 2) {
1209                 head_name = xstrdup(argv[1]);
1210         } else if (opt_a && !opt_d && argc == 1) {
1211                 struct ref_states states;
1212                 memset(&states, 0, sizeof(states));
1213                 get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1214                 if (!states.heads.nr)
1215                         result |= error("Cannot determine remote HEAD");
1216                 else if (states.heads.nr > 1) {
1217                         result |= error("Multiple remote HEAD branches. "
1218                                         "Please choose one explicitly with:");
1219                         for (i = 0; i < states.heads.nr; i++)
1220                                 fprintf(stderr, "  git remote set-head %s %s\n",
1221                                         argv[0], states.heads.items[i].string);
1222                 } else
1223                         head_name = xstrdup(states.heads.items[0].string);
1224                 free_remote_ref_states(&states);
1225         } else if (opt_d && !opt_a && argc == 1) {
1226                 if (delete_ref(buf.buf, NULL, REF_NODEREF))
1227                         result |= error("Could not delete %s", buf.buf);
1228         } else
1229                 usage_with_options(builtin_remote_sethead_usage, options);
1230
1231         if (head_name) {
1232                 unsigned char sha1[20];
1233                 strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1234                 /* make sure it's valid */
1235                 if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1236                         result |= error("Not a valid ref: %s", buf2.buf);
1237                 else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1238                         result |= error("Could not setup %s", buf.buf);
1239                 if (opt_a)
1240                         printf("%s/HEAD set to %s\n", argv[0], head_name);
1241                 free(head_name);
1242         }
1243
1244         strbuf_release(&buf);
1245         strbuf_release(&buf2);
1246         return result;
1247 }
1248
1249 static int prune(int argc, const char **argv)
1250 {
1251         int dry_run = 0, result = 0;
1252         struct option options[] = {
1253                 OPT__DRY_RUN(&dry_run, "dry run"),
1254                 OPT_END()
1255         };
1256
1257         argc = parse_options(argc, argv, NULL, options, builtin_remote_prune_usage,
1258                              0);
1259
1260         if (argc < 1)
1261                 usage_with_options(builtin_remote_prune_usage, options);
1262
1263         for (; argc; argc--, argv++)
1264                 result |= prune_remote(*argv, dry_run);
1265
1266         return result;
1267 }
1268
1269 static int prune_remote(const char *remote, int dry_run)
1270 {
1271         int result = 0, i;
1272         struct ref_states states;
1273         const char *dangling_msg = dry_run
1274                 ? " %s will become dangling!\n"
1275                 : " %s has become dangling!\n";
1276
1277         memset(&states, 0, sizeof(states));
1278         get_remote_ref_states(remote, &states, GET_REF_STATES);
1279
1280         if (states.stale.nr) {
1281                 printf("Pruning %s\n", remote);
1282                 printf("URL: %s\n",
1283                        states.remote->url_nr
1284                        ? states.remote->url[0]
1285                        : "(no URL)");
1286         }
1287
1288         for (i = 0; i < states.stale.nr; i++) {
1289                 const char *refname = states.stale.items[i].util;
1290
1291                 if (!dry_run)
1292                         result |= delete_ref(refname, NULL, 0);
1293
1294                 printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1295                        abbrev_ref(refname, "refs/remotes/"));
1296                 warn_dangling_symref(stdout, dangling_msg, refname);
1297         }
1298
1299         free_remote_ref_states(&states);
1300         return result;
1301 }
1302
1303 static int get_remote_default(const char *key, const char *value, void *priv)
1304 {
1305         if (strcmp(key, "remotes.default") == 0) {
1306                 int *found = priv;
1307                 *found = 1;
1308         }
1309         return 0;
1310 }
1311
1312 static int update(int argc, const char **argv)
1313 {
1314         int i, prune = 0;
1315         struct option options[] = {
1316                 OPT_BOOLEAN('p', "prune", &prune,
1317                             "prune remotes after fetching"),
1318                 OPT_END()
1319         };
1320         const char **fetch_argv;
1321         int fetch_argc = 0;
1322         int default_defined = 0;
1323
1324         fetch_argv = xmalloc(sizeof(char *) * (argc+5));
1325
1326         argc = parse_options(argc, argv, NULL, options, builtin_remote_update_usage,
1327                              PARSE_OPT_KEEP_ARGV0);
1328
1329         fetch_argv[fetch_argc++] = "fetch";
1330
1331         if (prune)
1332                 fetch_argv[fetch_argc++] = "--prune";
1333         if (verbose)
1334                 fetch_argv[fetch_argc++] = "-v";
1335         fetch_argv[fetch_argc++] = "--multiple";
1336         if (argc < 2)
1337                 fetch_argv[fetch_argc++] = "default";
1338         for (i = 1; i < argc; i++)
1339                 fetch_argv[fetch_argc++] = argv[i];
1340
1341         if (strcmp(fetch_argv[fetch_argc-1], "default") == 0) {
1342                 git_config(get_remote_default, &default_defined);
1343                 if (!default_defined)
1344                         fetch_argv[fetch_argc-1] = "--all";
1345         }
1346
1347         fetch_argv[fetch_argc] = NULL;
1348
1349         return run_command_v_opt(fetch_argv, RUN_GIT_CMD);
1350 }
1351
1352 static int remove_all_fetch_refspecs(const char *remote, const char *key)
1353 {
1354         return git_config_set_multivar(key, NULL, NULL, 1);
1355 }
1356
1357 static int add_branches(struct remote *remote, const char **branches,
1358                         const char *key)
1359 {
1360         const char *remotename = remote->name;
1361         int mirror = remote->mirror;
1362         struct strbuf refspec = STRBUF_INIT;
1363
1364         for (; *branches; branches++)
1365                 if (add_branch(key, *branches, remotename, mirror, &refspec)) {
1366                         strbuf_release(&refspec);
1367                         return 1;
1368                 }
1369
1370         strbuf_release(&refspec);
1371         return 0;
1372 }
1373
1374 static int set_remote_branches(const char *remotename, const char **branches,
1375                                 int add_mode)
1376 {
1377         struct strbuf key = STRBUF_INIT;
1378         struct remote *remote;
1379
1380         strbuf_addf(&key, "remote.%s.fetch", remotename);
1381
1382         if (!remote_is_configured(remotename))
1383                 die("No such remote '%s'", remotename);
1384         remote = remote_get(remotename);
1385
1386         if (!add_mode && remove_all_fetch_refspecs(remotename, key.buf)) {
1387                 strbuf_release(&key);
1388                 return 1;
1389         }
1390         if (add_branches(remote, branches, key.buf)) {
1391                 strbuf_release(&key);
1392                 return 1;
1393         }
1394
1395         strbuf_release(&key);
1396         return 0;
1397 }
1398
1399 static int set_branches(int argc, const char **argv)
1400 {
1401         int add_mode = 0;
1402         struct option options[] = {
1403                 OPT_BOOLEAN('\0', "add", &add_mode, "add branch"),
1404                 OPT_END()
1405         };
1406
1407         argc = parse_options(argc, argv, NULL, options,
1408                              builtin_remote_setbranches_usage, 0);
1409         if (argc == 0) {
1410                 error("no remote specified");
1411                 usage_with_options(builtin_remote_seturl_usage, options);
1412         }
1413         argv[argc] = NULL;
1414
1415         return set_remote_branches(argv[0], argv + 1, add_mode);
1416 }
1417
1418 static int set_url(int argc, const char **argv)
1419 {
1420         int i, push_mode = 0, add_mode = 0, delete_mode = 0;
1421         int matches = 0, negative_matches = 0;
1422         const char *remotename = NULL;
1423         const char *newurl = NULL;
1424         const char *oldurl = NULL;
1425         struct remote *remote;
1426         regex_t old_regex;
1427         const char **urlset;
1428         int urlset_nr;
1429         struct strbuf name_buf = STRBUF_INIT;
1430         struct option options[] = {
1431                 OPT_BOOLEAN('\0', "push", &push_mode,
1432                             "manipulate push URLs"),
1433                 OPT_BOOLEAN('\0', "add", &add_mode,
1434                             "add URL"),
1435                 OPT_BOOLEAN('\0', "delete", &delete_mode,
1436                             "delete URLs"),
1437                 OPT_END()
1438         };
1439         argc = parse_options(argc, argv, NULL, options, builtin_remote_update_usage,
1440                              PARSE_OPT_KEEP_ARGV0);
1441
1442         if (add_mode && delete_mode)
1443                 die("--add --delete doesn't make sense");
1444
1445         if (argc < 3 || argc > 4 || ((add_mode || delete_mode) && argc != 3))
1446                 usage_with_options(builtin_remote_seturl_usage, options);
1447
1448         remotename = argv[1];
1449         newurl = argv[2];
1450         if (argc > 3)
1451                 oldurl = argv[3];
1452
1453         if (delete_mode)
1454                 oldurl = newurl;
1455
1456         if (!remote_is_configured(remotename))
1457                 die("No such remote '%s'", remotename);
1458         remote = remote_get(remotename);
1459
1460         if (push_mode) {
1461                 strbuf_addf(&name_buf, "remote.%s.pushurl", remotename);
1462                 urlset = remote->pushurl;
1463                 urlset_nr = remote->pushurl_nr;
1464         } else {
1465                 strbuf_addf(&name_buf, "remote.%s.url", remotename);
1466                 urlset = remote->url;
1467                 urlset_nr = remote->url_nr;
1468         }
1469
1470         /* Special cases that add new entry. */
1471         if ((!oldurl && !delete_mode) || add_mode) {
1472                 if (add_mode)
1473                         git_config_set_multivar(name_buf.buf, newurl,
1474                                 "^$", 0);
1475                 else
1476                         git_config_set(name_buf.buf, newurl);
1477                 strbuf_release(&name_buf);
1478                 return 0;
1479         }
1480
1481         /* Old URL specified. Demand that one matches. */
1482         if (regcomp(&old_regex, oldurl, REG_EXTENDED))
1483                 die("Invalid old URL pattern: %s", oldurl);
1484
1485         for (i = 0; i < urlset_nr; i++)
1486                 if (!regexec(&old_regex, urlset[i], 0, NULL, 0))
1487                         matches++;
1488                 else
1489                         negative_matches++;
1490         if (!delete_mode && !matches)
1491                 die("No such URL found: %s", oldurl);
1492         if (delete_mode && !negative_matches && !push_mode)
1493                 die("Will not delete all non-push URLs");
1494
1495         regfree(&old_regex);
1496
1497         if (!delete_mode)
1498                 git_config_set_multivar(name_buf.buf, newurl, oldurl, 0);
1499         else
1500                 git_config_set_multivar(name_buf.buf, NULL, oldurl, 1);
1501         return 0;
1502 }
1503
1504 static int get_one_entry(struct remote *remote, void *priv)
1505 {
1506         struct string_list *list = priv;
1507         struct strbuf url_buf = STRBUF_INIT;
1508         const char **url;
1509         int i, url_nr;
1510
1511         if (remote->url_nr > 0) {
1512                 strbuf_addf(&url_buf, "%s (fetch)", remote->url[0]);
1513                 string_list_append(list, remote->name)->util =
1514                                 strbuf_detach(&url_buf, NULL);
1515         } else
1516                 string_list_append(list, remote->name)->util = NULL;
1517         if (remote->pushurl_nr) {
1518                 url = remote->pushurl;
1519                 url_nr = remote->pushurl_nr;
1520         } else {
1521                 url = remote->url;
1522                 url_nr = remote->url_nr;
1523         }
1524         for (i = 0; i < url_nr; i++)
1525         {
1526                 strbuf_addf(&url_buf, "%s (push)", url[i]);
1527                 string_list_append(list, remote->name)->util =
1528                                 strbuf_detach(&url_buf, NULL);
1529         }
1530
1531         return 0;
1532 }
1533
1534 static int show_all(void)
1535 {
1536         struct string_list list = STRING_LIST_INIT_NODUP;
1537         int result;
1538
1539         list.strdup_strings = 1;
1540         result = for_each_remote(get_one_entry, &list);
1541
1542         if (!result) {
1543                 int i;
1544
1545                 sort_string_list(&list);
1546                 for (i = 0; i < list.nr; i++) {
1547                         struct string_list_item *item = list.items + i;
1548                         if (verbose)
1549                                 printf("%s\t%s\n", item->string,
1550                                         item->util ? (const char *)item->util : "");
1551                         else {
1552                                 if (i && !strcmp((item - 1)->string, item->string))
1553                                         continue;
1554                                 printf("%s\n", item->string);
1555                         }
1556                 }
1557         }
1558         string_list_clear(&list, 1);
1559         return result;
1560 }
1561
1562 int cmd_remote(int argc, const char **argv, const char *prefix)
1563 {
1564         struct option options[] = {
1565                 OPT__VERBOSE(&verbose, "be verbose; must be placed before a subcommand"),
1566                 OPT_END()
1567         };
1568         int result;
1569
1570         argc = parse_options(argc, argv, prefix, options, builtin_remote_usage,
1571                 PARSE_OPT_STOP_AT_NON_OPTION);
1572
1573         if (argc < 1)
1574                 result = show_all();
1575         else if (!strcmp(argv[0], "add"))
1576                 result = add(argc, argv);
1577         else if (!strcmp(argv[0], "rename"))
1578                 result = mv(argc, argv);
1579         else if (!strcmp(argv[0], "rm"))
1580                 result = rm(argc, argv);
1581         else if (!strcmp(argv[0], "set-head"))
1582                 result = set_head(argc, argv);
1583         else if (!strcmp(argv[0], "set-branches"))
1584                 result = set_branches(argc, argv);
1585         else if (!strcmp(argv[0], "set-url"))
1586                 result = set_url(argc, argv);
1587         else if (!strcmp(argv[0], "show"))
1588                 result = show(argc, argv);
1589         else if (!strcmp(argv[0], "prune"))
1590                 result = prune(argc, argv);
1591         else if (!strcmp(argv[0], "update"))
1592                 result = update(argc, argv);
1593         else {
1594                 error("Unknown subcommand: %s", argv[0]);
1595                 usage_with_options(builtin_remote_usage, options);
1596         }
1597
1598         return result ? 1 : 0;
1599 }