builtin-remote.c

   1 #include "cache.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] <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 show [-n] <name>",
  17         "git remote prune [-n | --dry-run] <name>",
  18         "git remote [-v | --verbose] update [group]",
  19         NULL
  20 };
  21
  22 #define GET_REF_STATES (1<<0)
  23 #define GET_HEAD_NAMES (1<<1)
  24 #define GET_PUSH_REF_STATES (1<<2)
  25
  26 static int verbose;
  27
  28 static int show_all(void);
  29
  30 static inline int postfixcmp(const char *string, const char *postfix)
  31 {
  32         int len1 = strlen(string), len2 = strlen(postfix);
  33         if (len1 < len2)
  34                 return 1;
  35         return strcmp(string + len1 - len2, postfix);
  36 }
  37
  38 static int opt_parse_track(const struct option *opt, const char *arg, int not)
  39 {
  40         struct string_list *list = opt->value;
  41         if (not)
  42                 string_list_clear(list, 0);
  43         else
  44                 string_list_append(arg, list);
  45         return 0;
  46 }
  47
  48 static int fetch_remote(const char *name)
  49 {
  50         const char *argv[] = { "fetch", name, NULL, NULL };
  51         if (verbose) {
  52                 argv[1] = "-v";
  53                 argv[2] = name;
  54         }
  55         printf("Updating %s\n", name);
  56         if (run_command_v_opt(argv, RUN_GIT_CMD))
  57                 return error("Could not fetch %s", name);
  58         return 0;
  59 }
  60
  61 static int add(int argc, const char **argv)
  62 {
  63         int fetch = 0, mirror = 0;
  64         struct string_list track = { NULL, 0, 0 };
  65         const char *master = NULL;
  66         struct remote *remote;
  67         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
  68         const char *name, *url;
  69         int i;
  70
  71         struct option options[] = {
  72                 OPT_GROUP("add specific options"),
  73                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  74                 OPT_CALLBACK('t', "track", &track, "branch",
  75                         "branch(es) to track", opt_parse_track),
  76                 OPT_STRING('m', "master", &master, "branch", "master branch"),
  77                 OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  78                 OPT_END()
  79         };
  80
  81         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  82
  83         if (argc < 2)
  84                 usage_with_options(builtin_remote_usage, options);
  85
  86         name = argv[0];
  87         url = argv[1];
  88
  89         remote = remote_get(name);
  90         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  91                         remote->fetch_refspec_nr))
  92                 die("remote %s already exists.", name);
  93
  94         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  95         if (!valid_fetch_refspec(buf2.buf))
  96                 die("'%s' is not a valid remote name", name);
  97
  98         strbuf_addf(&buf, "remote.%s.url", name);
  99         if (git_config_set(buf.buf, url))
 100                 return 1;
 101
 102         strbuf_reset(&buf);
 103         strbuf_addf(&buf, "remote.%s.fetch", name);
 104
 105         if (track.nr == 0)
 106                 string_list_append("*", &track);
 107         for (i = 0; i < track.nr; i++) {
 108                 struct string_list_item *item = track.items + i;
 109
 110                 strbuf_reset(&buf2);
 111                 strbuf_addch(&buf2, '+');
 112                 if (mirror)
 113                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 114                                         item->string, item->string);
 115                 else
 116                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 117                                         item->string, name, item->string);
 118                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 119                         return 1;
 120         }
 121
 122         if (mirror) {
 123                 strbuf_reset(&buf);
 124                 strbuf_addf(&buf, "remote.%s.mirror", name);
 125                 if (git_config_set(buf.buf, "true"))
 126                         return 1;
 127         }
 128
 129         if (fetch && fetch_remote(name))
 130                 return 1;
 131
 132         if (master) {
 133                 strbuf_reset(&buf);
 134                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 135
 136                 strbuf_reset(&buf2);
 137                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 138
 139                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 140                         return error("Could not setup master '%s'", master);
 141         }
 142
 143         strbuf_release(&buf);
 144         strbuf_release(&buf2);
 145         string_list_clear(&track, 0);
 146
 147         return 0;
 148 }
 149
 150 struct branch_info {
 151         char *remote_name;
 152         struct string_list merge;
 153         int rebase;
 154 };
 155
 156 static struct string_list branch_list;
 157
 158 static const char *abbrev_ref(const char *name, const char *prefix)
 159 {
 160         const char *abbrev = skip_prefix(name, prefix);
 161         if (abbrev)
 162                 return abbrev;
 163         return name;
 164 }
 165 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 166
 167 static int config_read_branches(const char *key, const char *value, void *cb)
 168 {
 169         if (!prefixcmp(key, "branch.")) {
 170                 const char *orig_key = key;
 171                 char *name;
 172                 struct string_list_item *item;
 173                 struct branch_info *info;
 174                 enum { REMOTE, MERGE, REBASE } type;
 175
 176                 key += 7;
 177                 if (!postfixcmp(key, ".remote")) {
 178                         name = xstrndup(key, strlen(key) - 7);
 179                         type = REMOTE;
 180                 } else if (!postfixcmp(key, ".merge")) {
 181                         name = xstrndup(key, strlen(key) - 6);
 182                         type = MERGE;
 183                 } else if (!postfixcmp(key, ".rebase")) {
 184                         name = xstrndup(key, strlen(key) - 7);
 185                         type = REBASE;
 186                 } else
 187                         return 0;
 188
 189                 item = string_list_insert(name, &branch_list);
 190
 191                 if (!item->util)
 192                         item->util = xcalloc(sizeof(struct branch_info), 1);
 193                 info = item->util;
 194                 if (type == REMOTE) {
 195                         if (info->remote_name)
 196                                 warning("more than one %s", orig_key);
 197                         info->remote_name = xstrdup(value);
 198                 } else if (type == MERGE) {
 199                         char *space = strchr(value, ' ');
 200                         value = abbrev_branch(value);
 201                         while (space) {
 202                                 char *merge;
 203                                 merge = xstrndup(value, space - value);
 204                                 string_list_append(merge, &info->merge);
 205                                 value = abbrev_branch(space + 1);
 206                                 space = strchr(value, ' ');
 207                         }
 208                         string_list_append(xstrdup(value), &info->merge);
 209                 } else
 210                         info->rebase = git_config_bool(orig_key, value);
 211         }
 212         return 0;
 213 }
 214
 215 static void read_branches(void)
 216 {
 217         if (branch_list.nr)
 218                 return;
 219         git_config(config_read_branches, NULL);
 220 }
 221
 222 struct ref_states {
 223         struct remote *remote;
 224         struct string_list new, stale, tracked, heads, push;
 225         int queried;
 226 };
 227
 228 static int handle_one_branch(const char *refname,
 229         const unsigned char *sha1, int flags, void *cb_data)
 230 {
 231         struct ref_states *states = cb_data;
 232         struct refspec refspec;
 233
 234         memset(&refspec, 0, sizeof(refspec));
 235         refspec.dst = (char *)refname;
 236         if (!remote_find_tracking(states->remote, &refspec)) {
 237                 struct string_list_item *item;
 238                 const char *name = abbrev_branch(refspec.src);
 239                 /* symbolic refs pointing nowhere were handled already */
 240                 if ((flags & REF_ISSYMREF) ||
 241                     string_list_has_string(&states->tracked, name) ||
 242                     string_list_has_string(&states->new, name))
 243                         return 0;
 244                 item = string_list_append(name, &states->stale);
 245                 item->util = xstrdup(refname);
 246         }
 247         return 0;
 248 }
 249
 250 static int get_ref_states(const struct ref *remote_refs, struct ref_states *states)
 251 {
 252         struct ref *fetch_map = NULL, **tail = &fetch_map;
 253         struct ref *ref;
 254         int i;
 255
 256         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 257                 if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 258                         die("Could not get fetch map for refspec %s",
 259                                 states->remote->fetch_refspec[i]);
 260
 261         states->new.strdup_strings = states->tracked.strdup_strings = 1;
 262         for (ref = fetch_map; ref; ref = ref->next) {
 263                 unsigned char sha1[20];
 264                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 265                         string_list_append(abbrev_branch(ref->name), &states->new);
 266                 else
 267                         string_list_append(abbrev_branch(ref->name), &states->tracked);
 268         }
 269         free_refs(fetch_map);
 270
 271         sort_string_list(&states->new);
 272         sort_string_list(&states->tracked);
 273         for_each_ref(handle_one_branch, states);
 274         sort_string_list(&states->stale);
 275
 276         return 0;
 277 }
 278
 279 struct push_info {
 280         char *dest;
 281         int forced;
 282         enum {
 283                 PUSH_STATUS_CREATE = 0,
 284                 PUSH_STATUS_DELETE,
 285                 PUSH_STATUS_UPTODATE,
 286                 PUSH_STATUS_FASTFORWARD,
 287                 PUSH_STATUS_OUTOFDATE,
 288                 PUSH_STATUS_NOTQUERIED,
 289         } status;
 290 };
 291
 292 static int get_push_ref_states(const struct ref *remote_refs,
 293         struct ref_states *states)
 294 {
 295         struct remote *remote = states->remote;
 296         struct ref *ref, *local_refs, *push_map, **push_tail;
 297         if (remote->mirror)
 298                 return 0;
 299
 300         local_refs = get_local_heads();
 301         ref = push_map = copy_ref_list(remote_refs);
 302         while (ref->next)
 303                 ref = ref->next;
 304         push_tail = &ref->next;
 305
 306         match_refs(local_refs, push_map, &push_tail, remote->push_refspec_nr,
 307                    remote->push_refspec, MATCH_REFS_NONE);
 308
 309         states->push.strdup_strings = 1;
 310         for (ref = push_map; ref; ref = ref->next) {
 311                 struct string_list_item *item;
 312                 struct push_info *info;
 313
 314                 if (!ref->peer_ref)
 315                         continue;
 316                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
 317
 318                 item = string_list_append(abbrev_branch(ref->peer_ref->name),
 319                                           &states->push);
 320                 item->util = xcalloc(sizeof(struct push_info), 1);
 321                 info = item->util;
 322                 info->forced = ref->force;
 323                 info->dest = xstrdup(abbrev_branch(ref->name));
 324
 325                 if (is_null_sha1(ref->new_sha1)) {
 326                         info->status = PUSH_STATUS_DELETE;
 327                 } else if (!hashcmp(ref->old_sha1, ref->new_sha1))
 328                         info->status = PUSH_STATUS_UPTODATE;
 329                 else if (is_null_sha1(ref->old_sha1))
 330                         info->status = PUSH_STATUS_CREATE;
 331                 else if (has_sha1_file(ref->old_sha1) &&
 332                          ref_newer(ref->new_sha1, ref->old_sha1))
 333                         info->status = PUSH_STATUS_FASTFORWARD;
 334                 else
 335                         info->status = PUSH_STATUS_OUTOFDATE;
 336         }
 337         free_refs(local_refs);
 338         free_refs(push_map);
 339         return 0;
 340 }
 341
 342 static int get_push_ref_states_noquery(struct ref_states *states)
 343 {
 344         int i;
 345         struct remote *remote = states->remote;
 346         struct string_list_item *item;
 347         struct push_info *info;
 348
 349         if (remote->mirror)
 350                 return 0;
 351
 352         states->push.strdup_strings = 1;
 353         if (!remote->push_refspec_nr) {
 354                 item = string_list_append("(matching)", &states->push);
 355                 info = item->util = xcalloc(sizeof(struct push_info), 1);
 356                 info->status = PUSH_STATUS_NOTQUERIED;
 357                 info->dest = xstrdup(item->string);
 358         }
 359         for (i = 0; i < remote->push_refspec_nr; i++) {
 360                 struct refspec *spec = remote->push + i;
 361                 char buf[PATH_MAX];
 362                 if (spec->matching)
 363                         item = string_list_append("(matching)", &states->push);
 364                 else if (spec->pattern) {
 365                         snprintf(buf, (sizeof(buf)), "%s*", spec->src);
 366                         item = string_list_append(buf, &states->push);
 367                         snprintf(buf, (sizeof(buf)), "%s*", spec->dst);
 368                 } else if (strlen(spec->src))
 369                         item = string_list_append(spec->src, &states->push);
 370                 else
 371                         item = string_list_append("(delete)", &states->push);
 372
 373                 info = item->util = xcalloc(sizeof(struct push_info), 1);
 374                 info->forced = spec->force;
 375                 info->status = PUSH_STATUS_NOTQUERIED;
 376                 if (spec->pattern)
 377                         info->dest = xstrdup(buf);
 378                 else
 379                         info->dest = xstrdup(spec->dst ? spec->dst : item->string);
 380         }
 381         return 0;
 382 }
 383
 384 static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 385 {
 386         struct ref *ref, *matches;
 387         struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 388         struct refspec refspec;
 389
 390         refspec.force = 0;
 391         refspec.pattern = 1;
 392         refspec.src = refspec.dst = "refs/heads/";
 393         states->heads.strdup_strings = 1;
 394         get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 395         matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 396                                     fetch_map, 1);
 397         for(ref = matches; ref; ref = ref->next)
 398                 string_list_append(abbrev_branch(ref->name), &states->heads);
 399
 400         free_refs(fetch_map);
 401         free_refs(matches);
 402
 403         return 0;
 404 }
 405
 406 struct known_remote {
 407         struct known_remote *next;
 408         struct remote *remote;
 409 };
 410
 411 struct known_remotes {
 412         struct remote *to_delete;
 413         struct known_remote *list;
 414 };
 415
 416 static int add_known_remote(struct remote *remote, void *cb_data)
 417 {
 418         struct known_remotes *all = cb_data;
 419         struct known_remote *r;
 420
 421         if (!strcmp(all->to_delete->name, remote->name))
 422                 return 0;
 423
 424         r = xmalloc(sizeof(*r));
 425         r->remote = remote;
 426         r->next = all->list;
 427         all->list = r;
 428         return 0;
 429 }
 430
 431 struct branches_for_remote {
 432         struct remote *remote;
 433         struct string_list *branches, *skipped;
 434         struct known_remotes *keep;
 435 };
 436
 437 static int add_branch_for_removal(const char *refname,
 438         const unsigned char *sha1, int flags, void *cb_data)
 439 {
 440         struct branches_for_remote *branches = cb_data;
 441         struct refspec refspec;
 442         struct string_list_item *item;
 443         struct known_remote *kr;
 444
 445         memset(&refspec, 0, sizeof(refspec));
 446         refspec.dst = (char *)refname;
 447         if (remote_find_tracking(branches->remote, &refspec))
 448                 return 0;
 449
 450         /* don't delete a branch if another remote also uses it */
 451         for (kr = branches->keep->list; kr; kr = kr->next) {
 452                 memset(&refspec, 0, sizeof(refspec));
 453                 refspec.dst = (char *)refname;
 454                 if (!remote_find_tracking(kr->remote, &refspec))
 455                         return 0;
 456         }
 457
 458         /* don't delete non-remote refs */
 459         if (prefixcmp(refname, "refs/remotes")) {
 460                 /* advise user how to delete local branches */
 461                 if (!prefixcmp(refname, "refs/heads/"))
 462                         string_list_append(abbrev_branch(refname),
 463                                            branches->skipped);
 464                 /* silently skip over other non-remote refs */
 465                 return 0;
 466         }
 467
 468         /* make sure that symrefs are deleted */
 469         if (flags & REF_ISSYMREF)
 470                 return unlink(git_path("%s", refname));
 471
 472         item = string_list_append(refname, branches->branches);
 473         item->util = xmalloc(20);
 474         hashcpy(item->util, sha1);
 475
 476         return 0;
 477 }
 478
 479 struct rename_info {
 480         const char *old;
 481         const char *new;
 482         struct string_list *remote_branches;
 483 };
 484
 485 static int read_remote_branches(const char *refname,
 486         const unsigned char *sha1, int flags, void *cb_data)
 487 {
 488         struct rename_info *rename = cb_data;
 489         struct strbuf buf = STRBUF_INIT;
 490         struct string_list_item *item;
 491         int flag;
 492         unsigned char orig_sha1[20];
 493         const char *symref;
 494
 495         strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 496         if(!prefixcmp(refname, buf.buf)) {
 497                 item = string_list_append(xstrdup(refname), rename->remote_branches);
 498                 symref = resolve_ref(refname, orig_sha1, 1, &flag);
 499                 if (flag & REF_ISSYMREF)
 500                         item->util = xstrdup(symref);
 501                 else
 502                         item->util = NULL;
 503         }
 504
 505         return 0;
 506 }
 507
 508 static int migrate_file(struct remote *remote)
 509 {
 510         struct strbuf buf = STRBUF_INIT;
 511         int i;
 512         char *path = NULL;
 513
 514         strbuf_addf(&buf, "remote.%s.url", remote->name);
 515         for (i = 0; i < remote->url_nr; i++)
 516                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 517                         return error("Could not append '%s' to '%s'",
 518                                         remote->url[i], buf.buf);
 519         strbuf_reset(&buf);
 520         strbuf_addf(&buf, "remote.%s.push", remote->name);
 521         for (i = 0; i < remote->push_refspec_nr; i++)
 522                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 523                         return error("Could not append '%s' to '%s'",
 524                                         remote->push_refspec[i], buf.buf);
 525         strbuf_reset(&buf);
 526         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 527         for (i = 0; i < remote->fetch_refspec_nr; i++)
 528                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 529                         return error("Could not append '%s' to '%s'",
 530                                         remote->fetch_refspec[i], buf.buf);
 531         if (remote->origin == REMOTE_REMOTES)
 532                 path = git_path("remotes/%s", remote->name);
 533         else if (remote->origin == REMOTE_BRANCHES)
 534                 path = git_path("branches/%s", remote->name);
 535         if (path && unlink(path))
 536                 warning("failed to remove '%s'", path);
 537         return 0;
 538 }
 539
 540 static int mv(int argc, const char **argv)
 541 {
 542         struct option options[] = {
 543                 OPT_END()
 544         };
 545         struct remote *oldremote, *newremote;
 546         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 547         struct string_list remote_branches = { NULL, 0, 0, 0 };
 548         struct rename_info rename;
 549         int i;
 550
 551         if (argc != 3)
 552                 usage_with_options(builtin_remote_usage, options);
 553
 554         rename.old = argv[1];
 555         rename.new = argv[2];
 556         rename.remote_branches = &remote_branches;
 557
 558         oldremote = remote_get(rename.old);
 559         if (!oldremote)
 560                 die("No such remote: %s", rename.old);
 561
 562         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 563                 return migrate_file(oldremote);
 564
 565         newremote = remote_get(rename.new);
 566         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 567                 die("remote %s already exists.", rename.new);
 568
 569         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 570         if (!valid_fetch_refspec(buf.buf))
 571                 die("'%s' is not a valid remote name", rename.new);
 572
 573         strbuf_reset(&buf);
 574         strbuf_addf(&buf, "remote.%s", rename.old);
 575         strbuf_addf(&buf2, "remote.%s", rename.new);
 576         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 577                 return error("Could not rename config section '%s' to '%s'",
 578                                 buf.buf, buf2.buf);
 579
 580         strbuf_reset(&buf);
 581         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 582         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 583                 return error("Could not remove config section '%s'", buf.buf);
 584         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 585                 char *ptr;
 586
 587                 strbuf_reset(&buf2);
 588                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 589                 ptr = strstr(buf2.buf, rename.old);
 590                 if (ptr)
 591                         strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 592                                         rename.new, strlen(rename.new));
 593                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 594                         return error("Could not append '%s'", buf.buf);
 595         }
 596
 597         read_branches();
 598         for (i = 0; i < branch_list.nr; i++) {
 599                 struct string_list_item *item = branch_list.items + i;
 600                 struct branch_info *info = item->util;
 601                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 602                         strbuf_reset(&buf);
 603                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 604                         if (git_config_set(buf.buf, rename.new)) {
 605                                 return error("Could not set '%s'", buf.buf);
 606                         }
 607                 }
 608         }
 609
 610         /*
 611          * First remove symrefs, then rename the rest, finally create
 612          * the new symrefs.
 613          */
 614         for_each_ref(read_remote_branches, &rename);
 615         for (i = 0; i < remote_branches.nr; i++) {
 616                 struct string_list_item *item = remote_branches.items + i;
 617                 int flag = 0;
 618                 unsigned char sha1[20];
 619
 620                 resolve_ref(item->string, sha1, 1, &flag);
 621                 if (!(flag & REF_ISSYMREF))
 622                         continue;
 623                 if (delete_ref(item->string, NULL, REF_NODEREF))
 624                         die("deleting '%s' failed", item->string);
 625         }
 626         for (i = 0; i < remote_branches.nr; i++) {
 627                 struct string_list_item *item = remote_branches.items + i;
 628
 629                 if (item->util)
 630                         continue;
 631                 strbuf_reset(&buf);
 632                 strbuf_addstr(&buf, item->string);
 633                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 634                                 rename.new, strlen(rename.new));
 635                 strbuf_reset(&buf2);
 636                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 637                                 item->string, buf.buf);
 638                 if (rename_ref(item->string, buf.buf, buf2.buf))
 639                         die("renaming '%s' failed", item->string);
 640         }
 641         for (i = 0; i < remote_branches.nr; i++) {
 642                 struct string_list_item *item = remote_branches.items + i;
 643
 644                 if (!item->util)
 645                         continue;
 646                 strbuf_reset(&buf);
 647                 strbuf_addstr(&buf, item->string);
 648                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 649                                 rename.new, strlen(rename.new));
 650                 strbuf_reset(&buf2);
 651                 strbuf_addstr(&buf2, item->util);
 652                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 653                                 rename.new, strlen(rename.new));
 654                 strbuf_reset(&buf3);
 655                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 656                                 item->string, buf.buf);
 657                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 658                         die("creating '%s' failed", buf.buf);
 659         }
 660         return 0;
 661 }
 662
 663 static int remove_branches(struct string_list *branches)
 664 {
 665         int i, result = 0;
 666         for (i = 0; i < branches->nr; i++) {
 667                 struct string_list_item *item = branches->items + i;
 668                 const char *refname = item->string;
 669                 unsigned char *sha1 = item->util;
 670
 671                 if (delete_ref(refname, sha1, 0))
 672                         result |= error("Could not remove branch %s", refname);
 673         }
 674         return result;
 675 }
 676
 677 static int rm(int argc, const char **argv)
 678 {
 679         struct option options[] = {
 680                 OPT_END()
 681         };
 682         struct remote *remote;
 683         struct strbuf buf = STRBUF_INIT;
 684         struct known_remotes known_remotes = { NULL, NULL };
 685         struct string_list branches = { NULL, 0, 0, 1 };
 686         struct string_list skipped = { NULL, 0, 0, 1 };
 687         struct branches_for_remote cb_data = {
 688                 NULL, &branches, &skipped, &known_remotes
 689         };
 690         int i, result;
 691
 692         if (argc != 2)
 693                 usage_with_options(builtin_remote_usage, options);
 694
 695         remote = remote_get(argv[1]);
 696         if (!remote)
 697                 die("No such remote: %s", argv[1]);
 698
 699         known_remotes.to_delete = remote;
 700         for_each_remote(add_known_remote, &known_remotes);
 701
 702         strbuf_addf(&buf, "remote.%s", remote->name);
 703         if (git_config_rename_section(buf.buf, NULL) < 1)
 704                 return error("Could not remove config section '%s'", buf.buf);
 705
 706         read_branches();
 707         for (i = 0; i < branch_list.nr; i++) {
 708                 struct string_list_item *item = branch_list.items + i;
 709                 struct branch_info *info = item->util;
 710                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 711                         const char *keys[] = { "remote", "merge", NULL }, **k;
 712                         for (k = keys; *k; k++) {
 713                                 strbuf_reset(&buf);
 714                                 strbuf_addf(&buf, "branch.%s.%s",
 715                                                 item->string, *k);
 716                                 if (git_config_set(buf.buf, NULL)) {
 717                                         strbuf_release(&buf);
 718                                         return -1;
 719                                 }
 720                         }
 721                 }
 722         }
 723
 724         /*
 725          * We cannot just pass a function to for_each_ref() which deletes
 726          * the branches one by one, since for_each_ref() relies on cached
 727          * refs, which are invalidated when deleting a branch.
 728          */
 729         cb_data.remote = remote;
 730         result = for_each_ref(add_branch_for_removal, &cb_data);
 731         strbuf_release(&buf);
 732
 733         if (!result)
 734                 result = remove_branches(&branches);
 735         string_list_clear(&branches, 1);
 736
 737         if (skipped.nr) {
 738                 fprintf(stderr, skipped.nr == 1 ?
 739                         "Note: A non-remote branch was not removed; "
 740                         "to delete it, use:\n" :
 741                         "Note: Non-remote branches were not removed; "
 742                         "to delete them, use:\n");
 743                 for (i = 0; i < skipped.nr; i++)
 744                         fprintf(stderr, "  git branch -d %s\n",
 745                                 skipped.items[i].string);
 746         }
 747         string_list_clear(&skipped, 0);
 748
 749         return result;
 750 }
 751
 752 void clear_push_info(void *util, const char *string)
 753 {
 754         struct push_info *info = util;
 755         free(info->dest);
 756         free(info);
 757 }
 758
 759 static void free_remote_ref_states(struct ref_states *states)
 760 {
 761         string_list_clear(&states->new, 0);
 762         string_list_clear(&states->stale, 0);
 763         string_list_clear(&states->tracked, 0);
 764         string_list_clear(&states->heads, 0);
 765         string_list_clear_func(&states->push, clear_push_info);
 766 }
 767
 768 static int append_ref_to_tracked_list(const char *refname,
 769         const unsigned char *sha1, int flags, void *cb_data)
 770 {
 771         struct ref_states *states = cb_data;
 772         struct refspec refspec;
 773
 774         if (flags & REF_ISSYMREF)
 775                 return 0;
 776
 777         memset(&refspec, 0, sizeof(refspec));
 778         refspec.dst = (char *)refname;
 779         if (!remote_find_tracking(states->remote, &refspec))
 780                 string_list_append(abbrev_branch(refspec.src), &states->tracked);
 781
 782         return 0;
 783 }
 784
 785 static int get_remote_ref_states(const char *name,
 786                                  struct ref_states *states,
 787                                  int query)
 788 {
 789         struct transport *transport;
 790         const struct ref *remote_refs;
 791
 792         states->remote = remote_get(name);
 793         if (!states->remote)
 794                 return error("No such remote: %s", name);
 795
 796         read_branches();
 797
 798         if (query) {
 799                 transport = transport_get(NULL, states->remote->url_nr > 0 ?
 800                         states->remote->url[0] : NULL);
 801                 remote_refs = transport_get_remote_refs(transport);
 802                 transport_disconnect(transport);
 803
 804                 states->queried = 1;
 805                 if (query & GET_REF_STATES)
 806                         get_ref_states(remote_refs, states);
 807                 if (query & GET_HEAD_NAMES)
 808                         get_head_names(remote_refs, states);
 809                 if (query & GET_PUSH_REF_STATES)
 810                         get_push_ref_states(remote_refs, states);
 811         } else {
 812                 for_each_ref(append_ref_to_tracked_list, states);
 813                 sort_string_list(&states->tracked);
 814                 get_push_ref_states_noquery(states);
 815         }
 816
 817         return 0;
 818 }
 819
 820 struct show_info {
 821         struct string_list *list;
 822         struct ref_states *states;
 823         int width, width2;
 824         int any_rebase;
 825 };
 826
 827 int add_remote_to_show_info(struct string_list_item *item, void *cb_data)
 828 {
 829         struct show_info *info = cb_data;
 830         int n = strlen(item->string);
 831         if (n > info->width)
 832                 info->width = n;
 833         string_list_insert(item->string, info->list);
 834         return 0;
 835 }
 836
 837 int show_remote_info_item(struct string_list_item *item, void *cb_data)
 838 {
 839         struct show_info *info = cb_data;
 840         struct ref_states *states = info->states;
 841         const char *name = item->string;
 842
 843         if (states->queried) {
 844                 const char *fmt = "%s";
 845                 const char *arg = "";
 846                 if (string_list_has_string(&states->new, name)) {
 847                         fmt = " new (next fetch will store in remotes/%s)";
 848                         arg = states->remote->name;
 849                 } else if (string_list_has_string(&states->tracked, name))
 850                         arg = " tracked";
 851                 else if (string_list_has_string(&states->stale, name))
 852                         arg = " stale (use 'git remote prune' to remove)";
 853                 else
 854                         arg = " ???";
 855                 printf("    %-*s", info->width, name);
 856                 printf(fmt, arg);
 857                 printf("\n");
 858         } else
 859                 printf("    %s\n", name);
 860
 861         return 0;
 862 }
 863
 864 int add_local_to_show_info(struct string_list_item *branch_item, void *cb_data)
 865 {
 866         struct show_info *show_info = cb_data;
 867         struct ref_states *states = show_info->states;
 868         struct branch_info *branch_info = branch_item->util;
 869         struct string_list_item *item;
 870         int n;
 871
 872         if (!branch_info->merge.nr || !branch_info->remote_name ||
 873             strcmp(states->remote->name, branch_info->remote_name))
 874                 return 0;
 875         if ((n = strlen(branch_item->string)) > show_info->width)
 876                 show_info->width = n;
 877         if (branch_info->rebase)
 878                 show_info->any_rebase = 1;
 879
 880         item = string_list_insert(branch_item->string, show_info->list);
 881         item->util = branch_info;
 882
 883         return 0;
 884 }
 885
 886 int show_local_info_item(struct string_list_item *item, void *cb_data)
 887 {
 888         struct show_info *show_info = cb_data;
 889         struct branch_info *branch_info = item->util;
 890         struct string_list *merge = &branch_info->merge;
 891         const char *also;
 892         int i;
 893
 894         if (branch_info->rebase && branch_info->merge.nr > 1) {
 895                 error("invalid branch.%s.merge; cannot rebase onto > 1 branch",
 896                         item->string);
 897                 return 0;
 898         }
 899
 900         printf("    %-*s ", show_info->width, item->string);
 901         if (branch_info->rebase) {
 902                 printf("rebases onto remote %s\n", merge->items[0].string);
 903                 return 0;
 904         } else if (show_info->any_rebase) {
 905                 printf(" merges with remote %s\n", merge->items[0].string);
 906                 also = "    and with remote";
 907         } else {
 908                 printf("merges with remote %s\n", merge->items[0].string);
 909                 also = "   and with remote";
 910         }
 911         for (i = 1; i < merge->nr; i++)
 912                 printf("    %-*s %s %s\n", show_info->width, "", also,
 913                        merge->items[i].string);
 914
 915         return 0;
 916 }
 917
 918 int add_push_to_show_info(struct string_list_item *push_item, void *cb_data)
 919 {
 920         struct show_info *show_info = cb_data;
 921         struct push_info *push_info = push_item->util;
 922         struct string_list_item *item;
 923         int n;
 924         if ((n = strlen(push_item->string)) > show_info->width)
 925                 show_info->width = n;
 926         if ((n = strlen(push_info->dest)) > show_info->width2)
 927                 show_info->width2 = n;
 928         item = string_list_append(push_item->string, show_info->list);
 929         item->util = push_item->util;
 930         return 0;
 931 }
 932
 933 int show_push_info_item(struct string_list_item *item, void *cb_data)
 934 {
 935         struct show_info *show_info = cb_data;
 936         struct push_info *push_info = item->util;
 937         char *src = item->string, *status = NULL;
 938
 939         switch (push_info->status) {
 940         case PUSH_STATUS_CREATE:
 941                 status = "create";
 942                 break;
 943         case PUSH_STATUS_DELETE:
 944                 status = "delete";
 945                 src = "(none)";
 946                 break;
 947         case PUSH_STATUS_UPTODATE:
 948                 status = "up to date";
 949                 break;
 950         case PUSH_STATUS_FASTFORWARD:
 951                 status = "fast forwardable";
 952                 break;
 953         case PUSH_STATUS_OUTOFDATE:
 954                 status = "local out of date";
 955                 break;
 956         case PUSH_STATUS_NOTQUERIED:
 957                 break;
 958         }
 959         if (status)
 960                 printf("    %-*s %s to %-*s (%s)\n", show_info->width, src,
 961                         push_info->forced ? "forces" : "pushes",
 962                         show_info->width2, push_info->dest, status);
 963         else
 964                 printf("    %-*s %s to %s\n", show_info->width, src,
 965                         push_info->forced ? "forces" : "pushes",
 966                         push_info->dest);
 967         return 0;
 968 }
 969
 970 static int show(int argc, const char **argv)
 971 {
 972         int no_query = 0, result = 0, query_flag = 0;
 973         struct option options[] = {
 974                 OPT_GROUP("show specific options"),
 975                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 976                 OPT_END()
 977         };
 978         struct ref_states states;
 979         struct string_list info_list = { NULL, 0, 0, 0 };
 980         struct show_info info;
 981
 982         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 983
 984         if (argc < 1)
 985                 return show_all();
 986
 987         if (!no_query)
 988                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES | GET_PUSH_REF_STATES);
 989
 990         memset(&states, 0, sizeof(states));
 991         memset(&info, 0, sizeof(info));
 992         info.states = &states;
 993         info.list = &info_list;
 994         for (; argc; argc--, argv++) {
 995                 int i;
 996
 997                 get_remote_ref_states(*argv, &states, query_flag);
 998
 999                 printf("* remote %s\n  URL: %s\n", *argv,
1000                         states.remote->url_nr > 0 ?
1001                                 states.remote->url[0] : "(no URL)");
1002                 if (no_query)
1003                         printf("  HEAD branch: (not queried)\n");
1004                 else if (!states.heads.nr)
1005                         printf("  HEAD branch: (unknown)\n");
1006                 else if (states.heads.nr == 1)
1007                         printf("  HEAD branch: %s\n", states.heads.items[0].string);
1008                 else {
1009                         printf("  HEAD branch (remote HEAD is ambiguous,"
1010                                " may be one of the following):\n");
1011                         for (i = 0; i < states.heads.nr; i++)
1012                                 printf("    %s\n", states.heads.items[i].string);
1013                 }
1014
1015                 /* remote branch info */
1016                 info.width = 0;
1017                 for_each_string_list(add_remote_to_show_info, &states.new, &info);
1018                 for_each_string_list(add_remote_to_show_info, &states.tracked, &info);
1019                 for_each_string_list(add_remote_to_show_info, &states.stale, &info);
1020                 if (info.list->nr)
1021                         printf("  Remote branch%s:%s\n",
1022                                info.list->nr > 1 ? "es" : "",
1023                                 no_query ? " (status not queried)" : "");
1024                 for_each_string_list(show_remote_info_item, info.list, &info);
1025                 string_list_clear(info.list, 0);
1026
1027                 /* git pull info */
1028                 info.width = 0;
1029                 info.any_rebase = 0;
1030                 for_each_string_list(add_local_to_show_info, &branch_list, &info);
1031                 if (info.list->nr)
1032                         printf("  Local branch%s configured for 'git pull':\n",
1033                                info.list->nr > 1 ? "es" : "");
1034                 for_each_string_list(show_local_info_item, info.list, &info);
1035                 string_list_clear(info.list, 0);
1036
1037                 /* git push info */
1038                 if (states.remote->mirror)
1039                         printf("  Local refs will be mirrored by 'git push'\n");
1040
1041                 info.width = info.width2 = 0;
1042                 for_each_string_list(add_push_to_show_info, &states.push, &info);
1043                 sort_string_list(info.list);
1044                 if (info.list->nr)
1045                         printf("  Local ref%s configured for 'git push'%s:\n",
1046                                 info.list->nr > 1 ? "s" : "",
1047                                 no_query ? " (status not queried)" : "");
1048                 for_each_string_list(show_push_info_item, info.list, &info);
1049                 string_list_clear(info.list, 0);
1050
1051                 free_remote_ref_states(&states);
1052         }
1053
1054         return result;
1055 }
1056
1057 static int set_head(int argc, const char **argv)
1058 {
1059         int i, opt_a = 0, opt_d = 0, result = 0;
1060         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
1061         char *head_name = NULL;
1062
1063         struct option options[] = {
1064                 OPT_GROUP("set-head specific options"),
1065                 OPT_BOOLEAN('a', "auto", &opt_a,
1066                             "set refs/remotes/<name>/HEAD according to remote"),
1067                 OPT_BOOLEAN('d', "delete", &opt_d,
1068                             "delete refs/remotes/<name>/HEAD"),
1069                 OPT_END()
1070         };
1071         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1072         if (argc)
1073                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", argv[0]);
1074
1075         if (!opt_a && !opt_d && argc == 2) {
1076                 head_name = xstrdup(argv[1]);
1077         } else if (opt_a && !opt_d && argc == 1) {
1078                 struct ref_states states;
1079                 memset(&states, 0, sizeof(states));
1080                 get_remote_ref_states(argv[0], &states, GET_HEAD_NAMES);
1081                 if (!states.heads.nr)
1082                         result |= error("Cannot determine remote HEAD");
1083                 else if (states.heads.nr > 1) {
1084                         result |= error("Multiple remote HEAD branches. "
1085                                         "Please choose one explicitly with:");
1086                         for (i = 0; i < states.heads.nr; i++)
1087                                 fprintf(stderr, "  git remote set-head %s %s\n",
1088                                         argv[0], states.heads.items[i].string);
1089                 } else
1090                         head_name = xstrdup(states.heads.items[0].string);
1091                 free_remote_ref_states(&states);
1092         } else if (opt_d && !opt_a && argc == 1) {
1093                 if (delete_ref(buf.buf, NULL, REF_NODEREF))
1094                         result |= error("Could not delete %s", buf.buf);
1095         } else
1096                 usage_with_options(builtin_remote_usage, options);
1097
1098         if (head_name) {
1099                 unsigned char sha1[20];
1100                 strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
1101                 /* make sure it's valid */
1102                 if (!resolve_ref(buf2.buf, sha1, 1, NULL))
1103                         result |= error("Not a valid ref: %s", buf2.buf);
1104                 else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
1105                         result |= error("Could not setup %s", buf.buf);
1106                 if (opt_a)
1107                         printf("%s/HEAD set to %s\n", argv[0], head_name);
1108                 free(head_name);
1109         }
1110
1111         strbuf_release(&buf);
1112         strbuf_release(&buf2);
1113         return result;
1114 }
1115
1116 static int prune(int argc, const char **argv)
1117 {
1118         int dry_run = 0, result = 0;
1119         struct option options[] = {
1120                 OPT_GROUP("prune specific options"),
1121                 OPT__DRY_RUN(&dry_run),
1122                 OPT_END()
1123         };
1124         struct ref_states states;
1125         const char *dangling_msg;
1126
1127         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
1128
1129         if (argc < 1)
1130                 usage_with_options(builtin_remote_usage, options);
1131
1132         dangling_msg = (dry_run
1133                         ? " %s will become dangling!\n"
1134                         : " %s has become dangling!\n");
1135
1136         memset(&states, 0, sizeof(states));
1137         for (; argc; argc--, argv++) {
1138                 int i;
1139
1140                 get_remote_ref_states(*argv, &states, GET_REF_STATES);
1141
1142                 if (states.stale.nr) {
1143                         printf("Pruning %s\n", *argv);
1144                         printf("URL: %s\n",
1145                                states.remote->url_nr
1146                                ? states.remote->url[0]
1147                                : "(no URL)");
1148                 }
1149
1150                 for (i = 0; i < states.stale.nr; i++) {
1151                         const char *refname = states.stale.items[i].util;
1152
1153                         if (!dry_run)
1154                                 result |= delete_ref(refname, NULL, 0);
1155
1156                         printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
1157                                abbrev_ref(refname, "refs/remotes/"));
1158                         warn_dangling_symref(dangling_msg, refname);
1159                 }
1160
1161                 free_remote_ref_states(&states);
1162         }
1163
1164         return result;
1165 }
1166
1167 static int get_one_remote_for_update(struct remote *remote, void *priv)
1168 {
1169         struct string_list *list = priv;
1170         if (!remote->skip_default_update)
1171                 string_list_append(remote->name, list);
1172         return 0;
1173 }
1174
1175 struct remote_group {
1176         const char *name;
1177         struct string_list *list;
1178 } remote_group;
1179
1180 static int get_remote_group(const char *key, const char *value, void *cb)
1181 {
1182         if (!prefixcmp(key, "remotes.") &&
1183                         !strcmp(key + 8, remote_group.name)) {
1184                 /* split list by white space */
1185                 int space = strcspn(value, " \t\n");
1186                 while (*value) {
1187                         if (space > 1)
1188                                 string_list_append(xstrndup(value, space),
1189                                                 remote_group.list);
1190                         value += space + (value[space] != '\0');
1191                         space = strcspn(value, " \t\n");
1192                 }
1193         }
1194
1195         return 0;
1196 }
1197
1198 static int update(int argc, const char **argv)
1199 {
1200         int i, result = 0;
1201         struct string_list list = { NULL, 0, 0, 0 };
1202         static const char *default_argv[] = { NULL, "default", NULL };
1203
1204         if (argc < 2) {
1205                 argc = 2;
1206                 argv = default_argv;
1207         }
1208
1209         remote_group.list = &list;
1210         for (i = 1; i < argc; i++) {
1211                 remote_group.name = argv[i];
1212                 result = git_config(get_remote_group, NULL);
1213         }
1214
1215         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
1216                 result = for_each_remote(get_one_remote_for_update, &list);
1217
1218         for (i = 0; i < list.nr; i++)
1219                 result |= fetch_remote(list.items[i].string);
1220
1221         /* all names were strdup()ed or strndup()ed */
1222         list.strdup_strings = 1;
1223         string_list_clear(&list, 0);
1224
1225         return result;
1226 }
1227
1228 static int get_one_entry(struct remote *remote, void *priv)
1229 {
1230         struct string_list *list = priv;
1231
1232         if (remote->url_nr > 0) {
1233                 int i;
1234
1235                 for (i = 0; i < remote->url_nr; i++)
1236                         string_list_append(remote->name, list)->util = (void *)remote->url[i];
1237         } else
1238                 string_list_append(remote->name, list)->util = NULL;
1239
1240         return 0;
1241 }
1242
1243 static int show_all(void)
1244 {
1245         struct string_list list = { NULL, 0, 0 };
1246         int result = for_each_remote(get_one_entry, &list);
1247
1248         if (!result) {
1249                 int i;
1250
1251                 sort_string_list(&list);
1252                 for (i = 0; i < list.nr; i++) {
1253                         struct string_list_item *item = list.items + i;
1254                         if (verbose)
1255                                 printf("%s\t%s\n", item->string,
1256                                         item->util ? (const char *)item->util : "");
1257                         else {
1258                                 if (i && !strcmp((item - 1)->string, item->string))
1259                                         continue;
1260                                 printf("%s\n", item->string);
1261                         }
1262                 }
1263         }
1264         return result;
1265 }
1266
1267 int cmd_remote(int argc, const char **argv, const char *prefix)
1268 {
1269         struct option options[] = {
1270                 OPT__VERBOSE(&verbose),
1271                 OPT_END()
1272         };
1273         int result;
1274
1275         argc = parse_options(argc, argv, options, builtin_remote_usage,
1276                 PARSE_OPT_STOP_AT_NON_OPTION);
1277
1278         if (argc < 1)
1279                 result = show_all();
1280         else if (!strcmp(argv[0], "add"))
1281                 result = add(argc, argv);
1282         else if (!strcmp(argv[0], "rename"))
1283                 result = mv(argc, argv);
1284         else if (!strcmp(argv[0], "rm"))
1285                 result = rm(argc, argv);
1286         else if (!strcmp(argv[0], "set-head"))
1287                 result = set_head(argc, argv);
1288         else if (!strcmp(argv[0], "show"))
1289                 result = show(argc, argv);
1290         else if (!strcmp(argv[0], "prune"))
1291                 result = prune(argc, argv);
1292         else if (!strcmp(argv[0], "update"))
1293                 result = update(argc, argv);
1294         else {
1295                 error("Unknown subcommand: %s", argv[0]);
1296                 usage_with_options(builtin_remote_usage, options);
1297         }
1298
1299         return result ? 1 : 0;
1300 }