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 show [-n] <name>",
  16         "git remote prune [-n | --dry-run] <name>",
  17         "git remote [-v | --verbose] update [group]",
  18         NULL
  19 };
  20
  21 static int verbose;
  22
  23 static int show_all(void);
  24
  25 static inline int postfixcmp(const char *string, const char *postfix)
  26 {
  27         int len1 = strlen(string), len2 = strlen(postfix);
  28         if (len1 < len2)
  29                 return 1;
  30         return strcmp(string + len1 - len2, postfix);
  31 }
  32
  33 static int opt_parse_track(const struct option *opt, const char *arg, int not)
  34 {
  35         struct string_list *list = opt->value;
  36         if (not)
  37                 string_list_clear(list, 0);
  38         else
  39                 string_list_append(arg, list);
  40         return 0;
  41 }
  42
  43 static int fetch_remote(const char *name)
  44 {
  45         const char *argv[] = { "fetch", name, NULL, NULL };
  46         if (verbose) {
  47                 argv[1] = "-v";
  48                 argv[2] = name;
  49         }
  50         printf("Updating %s\n", name);
  51         if (run_command_v_opt(argv, RUN_GIT_CMD))
  52                 return error("Could not fetch %s", name);
  53         return 0;
  54 }
  55
  56 static int add(int argc, const char **argv)
  57 {
  58         int fetch = 0, mirror = 0;
  59         struct string_list track = { NULL, 0, 0 };
  60         const char *master = NULL;
  61         struct remote *remote;
  62         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
  63         const char *name, *url;
  64         int i;
  65
  66         struct option options[] = {
  67                 OPT_GROUP("add specific options"),
  68                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  69                 OPT_CALLBACK('t', "track", &track, "branch",
  70                         "branch(es) to track", opt_parse_track),
  71                 OPT_STRING('m', "master", &master, "branch", "master branch"),
  72                 OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  73                 OPT_END()
  74         };
  75
  76         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  77
  78         if (argc < 2)
  79                 usage_with_options(builtin_remote_usage, options);
  80
  81         name = argv[0];
  82         url = argv[1];
  83
  84         remote = remote_get(name);
  85         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  86                         remote->fetch_refspec_nr))
  87                 die("remote %s already exists.", name);
  88
  89         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  90         if (!valid_fetch_refspec(buf2.buf))
  91                 die("'%s' is not a valid remote name", name);
  92
  93         strbuf_addf(&buf, "remote.%s.url", name);
  94         if (git_config_set(buf.buf, url))
  95                 return 1;
  96
  97         strbuf_reset(&buf);
  98         strbuf_addf(&buf, "remote.%s.fetch", name);
  99
 100         if (track.nr == 0)
 101                 string_list_append("*", &track);
 102         for (i = 0; i < track.nr; i++) {
 103                 struct string_list_item *item = track.items + i;
 104
 105                 strbuf_reset(&buf2);
 106                 strbuf_addch(&buf2, '+');
 107                 if (mirror)
 108                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 109                                         item->string, item->string);
 110                 else
 111                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 112                                         item->string, name, item->string);
 113                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 114                         return 1;
 115         }
 116
 117         if (mirror) {
 118                 strbuf_reset(&buf);
 119                 strbuf_addf(&buf, "remote.%s.mirror", name);
 120                 if (git_config_set(buf.buf, "true"))
 121                         return 1;
 122         }
 123
 124         if (fetch && fetch_remote(name))
 125                 return 1;
 126
 127         if (master) {
 128                 strbuf_reset(&buf);
 129                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 130
 131                 strbuf_reset(&buf2);
 132                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 133
 134                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 135                         return error("Could not setup master '%s'", master);
 136         }
 137
 138         strbuf_release(&buf);
 139         strbuf_release(&buf2);
 140         string_list_clear(&track, 0);
 141
 142         return 0;
 143 }
 144
 145 struct branch_info {
 146         char *remote;
 147         struct string_list merge;
 148 };
 149
 150 static struct string_list branch_list;
 151
 152 static const char *abbrev_ref(const char *name, const char *prefix)
 153 {
 154         const char *abbrev = skip_prefix(name, prefix);
 155         if (abbrev)
 156                 return abbrev;
 157         return name;
 158 }
 159 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 160
 161 static int config_read_branches(const char *key, const char *value, void *cb)
 162 {
 163         if (!prefixcmp(key, "branch.")) {
 164                 char *name;
 165                 struct string_list_item *item;
 166                 struct branch_info *info;
 167                 enum { REMOTE, MERGE } type;
 168
 169                 key += 7;
 170                 if (!postfixcmp(key, ".remote")) {
 171                         name = xstrndup(key, strlen(key) - 7);
 172                         type = REMOTE;
 173                 } else if (!postfixcmp(key, ".merge")) {
 174                         name = xstrndup(key, strlen(key) - 6);
 175                         type = MERGE;
 176                 } else
 177                         return 0;
 178
 179                 item = string_list_insert(name, &branch_list);
 180
 181                 if (!item->util)
 182                         item->util = xcalloc(sizeof(struct branch_info), 1);
 183                 info = item->util;
 184                 if (type == REMOTE) {
 185                         if (info->remote)
 186                                 warning("more than one branch.%s", key);
 187                         info->remote = xstrdup(value);
 188                 } else {
 189                         char *space = strchr(value, ' ');
 190                         value = abbrev_branch(value);
 191                         while (space) {
 192                                 char *merge;
 193                                 merge = xstrndup(value, space - value);
 194                                 string_list_append(merge, &info->merge);
 195                                 value = abbrev_branch(space + 1);
 196                                 space = strchr(value, ' ');
 197                         }
 198                         string_list_append(xstrdup(value), &info->merge);
 199                 }
 200         }
 201         return 0;
 202 }
 203
 204 static void read_branches(void)
 205 {
 206         if (branch_list.nr)
 207                 return;
 208         git_config(config_read_branches, NULL);
 209         sort_string_list(&branch_list);
 210 }
 211
 212 struct ref_states {
 213         struct remote *remote;
 214         struct string_list new, stale, tracked;
 215 };
 216
 217 static int handle_one_branch(const char *refname,
 218         const unsigned char *sha1, int flags, void *cb_data)
 219 {
 220         struct ref_states *states = cb_data;
 221         struct refspec refspec;
 222
 223         memset(&refspec, 0, sizeof(refspec));
 224         refspec.dst = (char *)refname;
 225         if (!remote_find_tracking(states->remote, &refspec)) {
 226                 struct string_list_item *item;
 227                 const char *name = abbrev_branch(refspec.src);
 228                 /* symbolic refs pointing nowhere were handled already */
 229                 if ((flags & REF_ISSYMREF) ||
 230                                 unsorted_string_list_has_string(&states->tracked,
 231                                         name) ||
 232                                 unsorted_string_list_has_string(&states->new,
 233                                         name))
 234                         return 0;
 235                 item = string_list_append(name, &states->stale);
 236                 item->util = xstrdup(refname);
 237         }
 238         return 0;
 239 }
 240
 241 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 242 {
 243         struct ref *fetch_map = NULL, **tail = &fetch_map;
 244         int i;
 245
 246         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 247                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 248                         die("Could not get fetch map for refspec %s",
 249                                 states->remote->fetch_refspec[i]);
 250
 251         states->new.strdup_strings = states->tracked.strdup_strings = 1;
 252         for (ref = fetch_map; ref; ref = ref->next) {
 253                 struct string_list *target = &states->tracked;
 254                 unsigned char sha1[20];
 255                 void *util = NULL;
 256
 257                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 258                         target = &states->new;
 259                 else {
 260                         target = &states->tracked;
 261                         if (hashcmp(sha1, ref->new_sha1))
 262                                 util = &states;
 263                 }
 264                 string_list_append(abbrev_branch(ref->name), target)->util = util;
 265         }
 266         free_refs(fetch_map);
 267
 268         for_each_ref(handle_one_branch, states);
 269         sort_string_list(&states->stale);
 270
 271         return 0;
 272 }
 273
 274 struct known_remote {
 275         struct known_remote *next;
 276         struct remote *remote;
 277 };
 278
 279 struct known_remotes {
 280         struct remote *to_delete;
 281         struct known_remote *list;
 282 };
 283
 284 static int add_known_remote(struct remote *remote, void *cb_data)
 285 {
 286         struct known_remotes *all = cb_data;
 287         struct known_remote *r;
 288
 289         if (!strcmp(all->to_delete->name, remote->name))
 290                 return 0;
 291
 292         r = xmalloc(sizeof(*r));
 293         r->remote = remote;
 294         r->next = all->list;
 295         all->list = r;
 296         return 0;
 297 }
 298
 299 struct branches_for_remote {
 300         struct remote *remote;
 301         struct string_list *branches;
 302         struct known_remotes *keep;
 303 };
 304
 305 static int add_branch_for_removal(const char *refname,
 306         const unsigned char *sha1, int flags, void *cb_data)
 307 {
 308         struct branches_for_remote *branches = cb_data;
 309         struct refspec refspec;
 310         struct string_list_item *item;
 311         struct known_remote *kr;
 312
 313         memset(&refspec, 0, sizeof(refspec));
 314         refspec.dst = (char *)refname;
 315         if (remote_find_tracking(branches->remote, &refspec))
 316                 return 0;
 317
 318         /* don't delete a branch if another remote also uses it */
 319         for (kr = branches->keep->list; kr; kr = kr->next) {
 320                 memset(&refspec, 0, sizeof(refspec));
 321                 refspec.dst = (char *)refname;
 322                 if (!remote_find_tracking(kr->remote, &refspec))
 323                         return 0;
 324         }
 325
 326         /* make sure that symrefs are deleted */
 327         if (flags & REF_ISSYMREF)
 328                 return unlink(git_path("%s", refname));
 329
 330         item = string_list_append(refname, branches->branches);
 331         item->util = xmalloc(20);
 332         hashcpy(item->util, sha1);
 333
 334         return 0;
 335 }
 336
 337 struct rename_info {
 338         const char *old;
 339         const char *new;
 340         struct string_list *remote_branches;
 341 };
 342
 343 static int read_remote_branches(const char *refname,
 344         const unsigned char *sha1, int flags, void *cb_data)
 345 {
 346         struct rename_info *rename = cb_data;
 347         struct strbuf buf = STRBUF_INIT;
 348         struct string_list_item *item;
 349         int flag;
 350         unsigned char orig_sha1[20];
 351         const char *symref;
 352
 353         strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 354         if(!prefixcmp(refname, buf.buf)) {
 355                 item = string_list_append(xstrdup(refname), rename->remote_branches);
 356                 symref = resolve_ref(refname, orig_sha1, 1, &flag);
 357                 if (flag & REF_ISSYMREF)
 358                         item->util = xstrdup(symref);
 359                 else
 360                         item->util = NULL;
 361         }
 362
 363         return 0;
 364 }
 365
 366 static int migrate_file(struct remote *remote)
 367 {
 368         struct strbuf buf = STRBUF_INIT;
 369         int i;
 370         char *path = NULL;
 371
 372         strbuf_addf(&buf, "remote.%s.url", remote->name);
 373         for (i = 0; i < remote->url_nr; i++)
 374                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 375                         return error("Could not append '%s' to '%s'",
 376                                         remote->url[i], buf.buf);
 377         strbuf_reset(&buf);
 378         strbuf_addf(&buf, "remote.%s.push", remote->name);
 379         for (i = 0; i < remote->push_refspec_nr; i++)
 380                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 381                         return error("Could not append '%s' to '%s'",
 382                                         remote->push_refspec[i], buf.buf);
 383         strbuf_reset(&buf);
 384         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 385         for (i = 0; i < remote->fetch_refspec_nr; i++)
 386                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 387                         return error("Could not append '%s' to '%s'",
 388                                         remote->fetch_refspec[i], buf.buf);
 389         if (remote->origin == REMOTE_REMOTES)
 390                 path = git_path("remotes/%s", remote->name);
 391         else if (remote->origin == REMOTE_BRANCHES)
 392                 path = git_path("branches/%s", remote->name);
 393         if (path && unlink(path))
 394                 warning("failed to remove '%s'", path);
 395         return 0;
 396 }
 397
 398 static int mv(int argc, const char **argv)
 399 {
 400         struct option options[] = {
 401                 OPT_END()
 402         };
 403         struct remote *oldremote, *newremote;
 404         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 405         struct string_list remote_branches = { NULL, 0, 0, 0 };
 406         struct rename_info rename;
 407         int i;
 408
 409         if (argc != 3)
 410                 usage_with_options(builtin_remote_usage, options);
 411
 412         rename.old = argv[1];
 413         rename.new = argv[2];
 414         rename.remote_branches = &remote_branches;
 415
 416         oldremote = remote_get(rename.old);
 417         if (!oldremote)
 418                 die("No such remote: %s", rename.old);
 419
 420         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 421                 return migrate_file(oldremote);
 422
 423         newremote = remote_get(rename.new);
 424         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 425                 die("remote %s already exists.", rename.new);
 426
 427         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 428         if (!valid_fetch_refspec(buf.buf))
 429                 die("'%s' is not a valid remote name", rename.new);
 430
 431         strbuf_reset(&buf);
 432         strbuf_addf(&buf, "remote.%s", rename.old);
 433         strbuf_addf(&buf2, "remote.%s", rename.new);
 434         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 435                 return error("Could not rename config section '%s' to '%s'",
 436                                 buf.buf, buf2.buf);
 437
 438         strbuf_reset(&buf);
 439         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 440         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 441                 return error("Could not remove config section '%s'", buf.buf);
 442         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 443                 char *ptr;
 444
 445                 strbuf_reset(&buf2);
 446                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 447                 ptr = strstr(buf2.buf, rename.old);
 448                 if (ptr)
 449                         strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 450                                         rename.new, strlen(rename.new));
 451                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 452                         return error("Could not append '%s'", buf.buf);
 453         }
 454
 455         read_branches();
 456         for (i = 0; i < branch_list.nr; i++) {
 457                 struct string_list_item *item = branch_list.items + i;
 458                 struct branch_info *info = item->util;
 459                 if (info->remote && !strcmp(info->remote, rename.old)) {
 460                         strbuf_reset(&buf);
 461                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 462                         if (git_config_set(buf.buf, rename.new)) {
 463                                 return error("Could not set '%s'", buf.buf);
 464                         }
 465                 }
 466         }
 467
 468         /*
 469          * First remove symrefs, then rename the rest, finally create
 470          * the new symrefs.
 471          */
 472         for_each_ref(read_remote_branches, &rename);
 473         for (i = 0; i < remote_branches.nr; i++) {
 474                 struct string_list_item *item = remote_branches.items + i;
 475                 int flag = 0;
 476                 unsigned char sha1[20];
 477                 const char *symref;
 478
 479                 symref = resolve_ref(item->string, sha1, 1, &flag);
 480                 if (!(flag & REF_ISSYMREF))
 481                         continue;
 482                 if (delete_ref(item->string, NULL, REF_NODEREF))
 483                         die("deleting '%s' failed", item->string);
 484         }
 485         for (i = 0; i < remote_branches.nr; i++) {
 486                 struct string_list_item *item = remote_branches.items + i;
 487
 488                 if (item->util)
 489                         continue;
 490                 strbuf_reset(&buf);
 491                 strbuf_addstr(&buf, item->string);
 492                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 493                                 rename.new, strlen(rename.new));
 494                 strbuf_reset(&buf2);
 495                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 496                                 item->string, buf.buf);
 497                 if (rename_ref(item->string, buf.buf, buf2.buf))
 498                         die("renaming '%s' failed", item->string);
 499         }
 500         for (i = 0; i < remote_branches.nr; i++) {
 501                 struct string_list_item *item = remote_branches.items + i;
 502
 503                 if (!item->util)
 504                         continue;
 505                 strbuf_reset(&buf);
 506                 strbuf_addstr(&buf, item->string);
 507                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 508                                 rename.new, strlen(rename.new));
 509                 strbuf_reset(&buf2);
 510                 strbuf_addstr(&buf2, item->util);
 511                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 512                                 rename.new, strlen(rename.new));
 513                 strbuf_reset(&buf3);
 514                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 515                                 item->string, buf.buf);
 516                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 517                         die("creating '%s' failed", buf.buf);
 518         }
 519         return 0;
 520 }
 521
 522 static int remove_branches(struct string_list *branches)
 523 {
 524         int i, result = 0;
 525         for (i = 0; i < branches->nr; i++) {
 526                 struct string_list_item *item = branches->items + i;
 527                 const char *refname = item->string;
 528                 unsigned char *sha1 = item->util;
 529
 530                 if (delete_ref(refname, sha1, 0))
 531                         result |= error("Could not remove branch %s", refname);
 532         }
 533         return result;
 534 }
 535
 536 static int rm(int argc, const char **argv)
 537 {
 538         struct option options[] = {
 539                 OPT_END()
 540         };
 541         struct remote *remote;
 542         struct strbuf buf = STRBUF_INIT;
 543         struct known_remotes known_remotes = { NULL, NULL };
 544         struct string_list branches = { NULL, 0, 0, 1 };
 545         struct branches_for_remote cb_data = { NULL, &branches, &known_remotes };
 546         int i;
 547
 548         if (argc != 2)
 549                 usage_with_options(builtin_remote_usage, options);
 550
 551         remote = remote_get(argv[1]);
 552         if (!remote)
 553                 die("No such remote: %s", argv[1]);
 554
 555         known_remotes.to_delete = remote;
 556         for_each_remote(add_known_remote, &known_remotes);
 557
 558         strbuf_addf(&buf, "remote.%s", remote->name);
 559         if (git_config_rename_section(buf.buf, NULL) < 1)
 560                 return error("Could not remove config section '%s'", buf.buf);
 561
 562         read_branches();
 563         for (i = 0; i < branch_list.nr; i++) {
 564                 struct string_list_item *item = branch_list.items + i;
 565                 struct branch_info *info = item->util;
 566                 if (info->remote && !strcmp(info->remote, remote->name)) {
 567                         const char *keys[] = { "remote", "merge", NULL }, **k;
 568                         for (k = keys; *k; k++) {
 569                                 strbuf_reset(&buf);
 570                                 strbuf_addf(&buf, "branch.%s.%s",
 571                                                 item->string, *k);
 572                                 if (git_config_set(buf.buf, NULL)) {
 573                                         strbuf_release(&buf);
 574                                         return -1;
 575                                 }
 576                         }
 577                 }
 578         }
 579
 580         /*
 581          * We cannot just pass a function to for_each_ref() which deletes
 582          * the branches one by one, since for_each_ref() relies on cached
 583          * refs, which are invalidated when deleting a branch.
 584          */
 585         cb_data.remote = remote;
 586         i = for_each_ref(add_branch_for_removal, &cb_data);
 587         strbuf_release(&buf);
 588
 589         if (!i)
 590                 i = remove_branches(&branches);
 591         string_list_clear(&branches, 1);
 592
 593         return i;
 594 }
 595
 596 static void show_list(const char *title, struct string_list *list,
 597                       const char *extra_arg)
 598 {
 599         int i;
 600
 601         if (!list->nr)
 602                 return;
 603
 604         printf(title, list->nr > 1 ? "es" : "", extra_arg);
 605         printf("\n");
 606         for (i = 0; i < list->nr; i++)
 607                 printf("    %s\n", list->items[i].string);
 608 }
 609
 610 static int get_remote_ref_states(const char *name,
 611                                  struct ref_states *states,
 612                                  int query)
 613 {
 614         struct transport *transport;
 615         const struct ref *ref;
 616
 617         states->remote = remote_get(name);
 618         if (!states->remote)
 619                 return error("No such remote: %s", name);
 620
 621         read_branches();
 622
 623         if (query) {
 624                 transport = transport_get(NULL, states->remote->url_nr > 0 ?
 625                         states->remote->url[0] : NULL);
 626                 ref = transport_get_remote_refs(transport);
 627                 transport_disconnect(transport);
 628
 629                 get_ref_states(ref, states);
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int append_ref_to_tracked_list(const char *refname,
 636         const unsigned char *sha1, int flags, void *cb_data)
 637 {
 638         struct ref_states *states = cb_data;
 639         struct refspec refspec;
 640
 641         memset(&refspec, 0, sizeof(refspec));
 642         refspec.dst = (char *)refname;
 643         if (!remote_find_tracking(states->remote, &refspec))
 644                 string_list_append(abbrev_branch(refspec.src), &states->tracked);
 645
 646         return 0;
 647 }
 648
 649 static int show(int argc, const char **argv)
 650 {
 651         int no_query = 0, result = 0;
 652         struct option options[] = {
 653                 OPT_GROUP("show specific options"),
 654                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 655                 OPT_END()
 656         };
 657         struct ref_states states;
 658
 659         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 660
 661         if (argc < 1)
 662                 return show_all();
 663
 664         memset(&states, 0, sizeof(states));
 665         for (; argc; argc--, argv++) {
 666                 int i;
 667
 668                 get_remote_ref_states(*argv, &states, !no_query);
 669
 670                 printf("* remote %s\n  URL: %s\n", *argv,
 671                         states.remote->url_nr > 0 ?
 672                                 states.remote->url[0] : "(no URL)");
 673
 674                 for (i = 0; i < branch_list.nr; i++) {
 675                         struct string_list_item *branch = branch_list.items + i;
 676                         struct branch_info *info = branch->util;
 677                         int j;
 678
 679                         if (!info->merge.nr || strcmp(*argv, info->remote))
 680                                 continue;
 681                         printf("  Remote branch%s merged with 'git pull' "
 682                                 "while on branch %s\n   ",
 683                                 info->merge.nr > 1 ? "es" : "",
 684                                 branch->string);
 685                         for (j = 0; j < info->merge.nr; j++)
 686                                 printf(" %s", info->merge.items[j].string);
 687                         printf("\n");
 688                 }
 689
 690                 if (!no_query) {
 691                         show_list("  New remote branch%s (next fetch "
 692                                 "will store in remotes/%s)",
 693                                 &states.new, states.remote->name);
 694                         show_list("  Stale tracking branch%s (use 'git remote "
 695                                 "prune')", &states.stale, "");
 696                 }
 697
 698                 if (no_query)
 699                         for_each_ref(append_ref_to_tracked_list, &states);
 700                 show_list("  Tracked remote branch%s", &states.tracked, "");
 701
 702                 if (states.remote->push_refspec_nr) {
 703                         printf("  Local branch%s pushed with 'git push'\n",
 704                                 states.remote->push_refspec_nr > 1 ?
 705                                         "es" : "");
 706                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 707                                 struct refspec *spec = states.remote->push + i;
 708                                 printf("    %s%s%s%s\n",
 709                                        spec->force ? "+" : "",
 710                                        abbrev_branch(spec->src),
 711                                        spec->dst ? ":" : "",
 712                                        spec->dst ? abbrev_branch(spec->dst) : "");
 713                         }
 714                 }
 715
 716                 /* NEEDSWORK: free remote */
 717                 string_list_clear(&states.new, 0);
 718                 string_list_clear(&states.stale, 0);
 719                 string_list_clear(&states.tracked, 0);
 720         }
 721
 722         return result;
 723 }
 724
 725 static int prune(int argc, const char **argv)
 726 {
 727         int dry_run = 0, result = 0;
 728         struct option options[] = {
 729                 OPT_GROUP("prune specific options"),
 730                 OPT__DRY_RUN(&dry_run),
 731                 OPT_END()
 732         };
 733         struct ref_states states;
 734
 735         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 736
 737         if (argc < 1)
 738                 usage_with_options(builtin_remote_usage, options);
 739
 740         memset(&states, 0, sizeof(states));
 741         for (; argc; argc--, argv++) {
 742                 int i;
 743
 744                 get_remote_ref_states(*argv, &states, 1);
 745
 746                 if (states.stale.nr) {
 747                         printf("Pruning %s\n", *argv);
 748                         printf("URL: %s\n",
 749                                states.remote->url_nr
 750                                ? states.remote->url[0]
 751                                : "(no URL)");
 752                 }
 753
 754                 for (i = 0; i < states.stale.nr; i++) {
 755                         const char *refname = states.stale.items[i].util;
 756
 757                         if (!dry_run)
 758                                 result |= delete_ref(refname, NULL, 0);
 759
 760                         printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
 761                                abbrev_ref(refname, "refs/remotes/"));
 762                 }
 763
 764                 /* NEEDSWORK: free remote */
 765                 string_list_clear(&states.new, 0);
 766                 string_list_clear(&states.stale, 0);
 767                 string_list_clear(&states.tracked, 0);
 768         }
 769
 770         return result;
 771 }
 772
 773 static int get_one_remote_for_update(struct remote *remote, void *priv)
 774 {
 775         struct string_list *list = priv;
 776         if (!remote->skip_default_update)
 777                 string_list_append(remote->name, list);
 778         return 0;
 779 }
 780
 781 struct remote_group {
 782         const char *name;
 783         struct string_list *list;
 784 } remote_group;
 785
 786 static int get_remote_group(const char *key, const char *value, void *cb)
 787 {
 788         if (!prefixcmp(key, "remotes.") &&
 789                         !strcmp(key + 8, remote_group.name)) {
 790                 /* split list by white space */
 791                 int space = strcspn(value, " \t\n");
 792                 while (*value) {
 793                         if (space > 1)
 794                                 string_list_append(xstrndup(value, space),
 795                                                 remote_group.list);
 796                         value += space + (value[space] != '\0');
 797                         space = strcspn(value, " \t\n");
 798                 }
 799         }
 800
 801         return 0;
 802 }
 803
 804 static int update(int argc, const char **argv)
 805 {
 806         int i, result = 0;
 807         struct string_list list = { NULL, 0, 0, 0 };
 808         static const char *default_argv[] = { NULL, "default", NULL };
 809
 810         if (argc < 2) {
 811                 argc = 2;
 812                 argv = default_argv;
 813         }
 814
 815         remote_group.list = &list;
 816         for (i = 1; i < argc; i++) {
 817                 remote_group.name = argv[i];
 818                 result = git_config(get_remote_group, NULL);
 819         }
 820
 821         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 822                 result = for_each_remote(get_one_remote_for_update, &list);
 823
 824         for (i = 0; i < list.nr; i++)
 825                 result |= fetch_remote(list.items[i].string);
 826
 827         /* all names were strdup()ed or strndup()ed */
 828         list.strdup_strings = 1;
 829         string_list_clear(&list, 0);
 830
 831         return result;
 832 }
 833
 834 static int get_one_entry(struct remote *remote, void *priv)
 835 {
 836         struct string_list *list = priv;
 837
 838         if (remote->url_nr > 0) {
 839                 int i;
 840
 841                 for (i = 0; i < remote->url_nr; i++)
 842                         string_list_append(remote->name, list)->util = (void *)remote->url[i];
 843         } else
 844                 string_list_append(remote->name, list)->util = NULL;
 845
 846         return 0;
 847 }
 848
 849 static int show_all(void)
 850 {
 851         struct string_list list = { NULL, 0, 0 };
 852         int result = for_each_remote(get_one_entry, &list);
 853
 854         if (!result) {
 855                 int i;
 856
 857                 sort_string_list(&list);
 858                 for (i = 0; i < list.nr; i++) {
 859                         struct string_list_item *item = list.items + i;
 860                         if (verbose)
 861                                 printf("%s\t%s\n", item->string,
 862                                         item->util ? (const char *)item->util : "");
 863                         else {
 864                                 if (i && !strcmp((item - 1)->string, item->string))
 865                                         continue;
 866                                 printf("%s\n", item->string);
 867                         }
 868                 }
 869         }
 870         return result;
 871 }
 872
 873 int cmd_remote(int argc, const char **argv, const char *prefix)
 874 {
 875         struct option options[] = {
 876                 OPT__VERBOSE(&verbose),
 877                 OPT_END()
 878         };
 879         int result;
 880
 881         argc = parse_options(argc, argv, options, builtin_remote_usage,
 882                 PARSE_OPT_STOP_AT_NON_OPTION);
 883
 884         if (argc < 1)
 885                 result = show_all();
 886         else if (!strcmp(argv[0], "add"))
 887                 result = add(argc, argv);
 888         else if (!strcmp(argv[0], "rename"))
 889                 result = mv(argc, argv);
 890         else if (!strcmp(argv[0], "rm"))
 891                 result = rm(argc, argv);
 892         else if (!strcmp(argv[0], "show"))
 893                 result = show(argc, argv);
 894         else if (!strcmp(argv[0], "prune"))
 895                 result = prune(argc, argv);
 896         else if (!strcmp(argv[0], "update"))
 897                 result = update(argc, argv);
 898         else {
 899                 error("Unknown subcommand: %s", argv[0]);
 900                 usage_with_options(builtin_remote_usage, options);
 901         }
 902
 903         return result ? 1 : 0;
 904 }