git.oblomov.eu Git - git/blob - 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, *skipped;
 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         /* don't delete non-remote refs */
 327         if (prefixcmp(refname, "refs/remotes")) {
 328                 /* advise user how to delete local branches */
 329                 if (!prefixcmp(refname, "refs/heads/"))
 330                         string_list_append(abbrev_branch(refname),
 331                                            branches->skipped);
 332                 /* silently skip over other non-remote refs */
 333                 return 0;
 334         }
 335
 336         /* make sure that symrefs are deleted */
 337         if (flags & REF_ISSYMREF)
 338                 return unlink(git_path("%s", refname));
 339
 340         item = string_list_append(refname, branches->branches);
 341         item->util = xmalloc(20);
 342         hashcpy(item->util, sha1);
 343
 344         return 0;
 345 }
 346
 347 struct rename_info {
 348         const char *old;
 349         const char *new;
 350         struct string_list *remote_branches;
 351 };
 352
 353 static int read_remote_branches(const char *refname,
 354         const unsigned char *sha1, int flags, void *cb_data)
 355 {
 356         struct rename_info *rename = cb_data;
 357         struct strbuf buf = STRBUF_INIT;
 358         struct string_list_item *item;
 359         int flag;
 360         unsigned char orig_sha1[20];
 361         const char *symref;
 362
 363         strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 364         if(!prefixcmp(refname, buf.buf)) {
 365                 item = string_list_append(xstrdup(refname), rename->remote_branches);
 366                 symref = resolve_ref(refname, orig_sha1, 1, &flag);
 367                 if (flag & REF_ISSYMREF)
 368                         item->util = xstrdup(symref);
 369                 else
 370                         item->util = NULL;
 371         }
 372
 373         return 0;
 374 }
 375
 376 static int migrate_file(struct remote *remote)
 377 {
 378         struct strbuf buf = STRBUF_INIT;
 379         int i;
 380         char *path = NULL;
 381
 382         strbuf_addf(&buf, "remote.%s.url", remote->name);
 383         for (i = 0; i < remote->url_nr; i++)
 384                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 385                         return error("Could not append '%s' to '%s'",
 386                                         remote->url[i], buf.buf);
 387         strbuf_reset(&buf);
 388         strbuf_addf(&buf, "remote.%s.push", remote->name);
 389         for (i = 0; i < remote->push_refspec_nr; i++)
 390                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 391                         return error("Could not append '%s' to '%s'",
 392                                         remote->push_refspec[i], buf.buf);
 393         strbuf_reset(&buf);
 394         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 395         for (i = 0; i < remote->fetch_refspec_nr; i++)
 396                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 397                         return error("Could not append '%s' to '%s'",
 398                                         remote->fetch_refspec[i], buf.buf);
 399         if (remote->origin == REMOTE_REMOTES)
 400                 path = git_path("remotes/%s", remote->name);
 401         else if (remote->origin == REMOTE_BRANCHES)
 402                 path = git_path("branches/%s", remote->name);
 403         if (path && unlink(path))
 404                 warning("failed to remove '%s'", path);
 405         return 0;
 406 }
 407
 408 static int mv(int argc, const char **argv)
 409 {
 410         struct option options[] = {
 411                 OPT_END()
 412         };
 413         struct remote *oldremote, *newremote;
 414         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 415         struct string_list remote_branches = { NULL, 0, 0, 0 };
 416         struct rename_info rename;
 417         int i;
 418
 419         if (argc != 3)
 420                 usage_with_options(builtin_remote_usage, options);
 421
 422         rename.old = argv[1];
 423         rename.new = argv[2];
 424         rename.remote_branches = &remote_branches;
 425
 426         oldremote = remote_get(rename.old);
 427         if (!oldremote)
 428                 die("No such remote: %s", rename.old);
 429
 430         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 431                 return migrate_file(oldremote);
 432
 433         newremote = remote_get(rename.new);
 434         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 435                 die("remote %s already exists.", rename.new);
 436
 437         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 438         if (!valid_fetch_refspec(buf.buf))
 439                 die("'%s' is not a valid remote name", rename.new);
 440
 441         strbuf_reset(&buf);
 442         strbuf_addf(&buf, "remote.%s", rename.old);
 443         strbuf_addf(&buf2, "remote.%s", rename.new);
 444         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 445                 return error("Could not rename config section '%s' to '%s'",
 446                                 buf.buf, buf2.buf);
 447
 448         strbuf_reset(&buf);
 449         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 450         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 451                 return error("Could not remove config section '%s'", buf.buf);
 452         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 453                 char *ptr;
 454
 455                 strbuf_reset(&buf2);
 456                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 457                 ptr = strstr(buf2.buf, rename.old);
 458                 if (ptr)
 459                         strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 460                                         rename.new, strlen(rename.new));
 461                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 462                         return error("Could not append '%s'", buf.buf);
 463         }
 464
 465         read_branches();
 466         for (i = 0; i < branch_list.nr; i++) {
 467                 struct string_list_item *item = branch_list.items + i;
 468                 struct branch_info *info = item->util;
 469                 if (info->remote && !strcmp(info->remote, rename.old)) {
 470                         strbuf_reset(&buf);
 471                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 472                         if (git_config_set(buf.buf, rename.new)) {
 473                                 return error("Could not set '%s'", buf.buf);
 474                         }
 475                 }
 476         }
 477
 478         /*
 479          * First remove symrefs, then rename the rest, finally create
 480          * the new symrefs.
 481          */
 482         for_each_ref(read_remote_branches, &rename);
 483         for (i = 0; i < remote_branches.nr; i++) {
 484                 struct string_list_item *item = remote_branches.items + i;
 485                 int flag = 0;
 486                 unsigned char sha1[20];
 487                 const char *symref;
 488
 489                 symref = resolve_ref(item->string, sha1, 1, &flag);
 490                 if (!(flag & REF_ISSYMREF))
 491                         continue;
 492                 if (delete_ref(item->string, NULL, REF_NODEREF))
 493                         die("deleting '%s' failed", item->string);
 494         }
 495         for (i = 0; i < remote_branches.nr; i++) {
 496                 struct string_list_item *item = remote_branches.items + i;
 497
 498                 if (item->util)
 499                         continue;
 500                 strbuf_reset(&buf);
 501                 strbuf_addstr(&buf, item->string);
 502                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 503                                 rename.new, strlen(rename.new));
 504                 strbuf_reset(&buf2);
 505                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 506                                 item->string, buf.buf);
 507                 if (rename_ref(item->string, buf.buf, buf2.buf))
 508                         die("renaming '%s' failed", item->string);
 509         }
 510         for (i = 0; i < remote_branches.nr; i++) {
 511                 struct string_list_item *item = remote_branches.items + i;
 512
 513                 if (!item->util)
 514                         continue;
 515                 strbuf_reset(&buf);
 516                 strbuf_addstr(&buf, item->string);
 517                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 518                                 rename.new, strlen(rename.new));
 519                 strbuf_reset(&buf2);
 520                 strbuf_addstr(&buf2, item->util);
 521                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 522                                 rename.new, strlen(rename.new));
 523                 strbuf_reset(&buf3);
 524                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 525                                 item->string, buf.buf);
 526                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 527                         die("creating '%s' failed", buf.buf);
 528         }
 529         return 0;
 530 }
 531
 532 static int remove_branches(struct string_list *branches)
 533 {
 534         int i, result = 0;
 535         for (i = 0; i < branches->nr; i++) {
 536                 struct string_list_item *item = branches->items + i;
 537                 const char *refname = item->string;
 538                 unsigned char *sha1 = item->util;
 539
 540                 if (delete_ref(refname, sha1, 0))
 541                         result |= error("Could not remove branch %s", refname);
 542         }
 543         return result;
 544 }
 545
 546 static int rm(int argc, const char **argv)
 547 {
 548         struct option options[] = {
 549                 OPT_END()
 550         };
 551         struct remote *remote;
 552         struct strbuf buf = STRBUF_INIT;
 553         struct known_remotes known_remotes = { NULL, NULL };
 554         struct string_list branches = { NULL, 0, 0, 1 };
 555         struct string_list skipped = { NULL, 0, 0, 1 };
 556         struct branches_for_remote cb_data = {
 557                 NULL, &branches, &skipped, &known_remotes
 558         };
 559         int i, result;
 560
 561         if (argc != 2)
 562                 usage_with_options(builtin_remote_usage, options);
 563
 564         remote = remote_get(argv[1]);
 565         if (!remote)
 566                 die("No such remote: %s", argv[1]);
 567
 568         known_remotes.to_delete = remote;
 569         for_each_remote(add_known_remote, &known_remotes);
 570
 571         strbuf_addf(&buf, "remote.%s", remote->name);
 572         if (git_config_rename_section(buf.buf, NULL) < 1)
 573                 return error("Could not remove config section '%s'", buf.buf);
 574
 575         read_branches();
 576         for (i = 0; i < branch_list.nr; i++) {
 577                 struct string_list_item *item = branch_list.items + i;
 578                 struct branch_info *info = item->util;
 579                 if (info->remote && !strcmp(info->remote, remote->name)) {
 580                         const char *keys[] = { "remote", "merge", NULL }, **k;
 581                         for (k = keys; *k; k++) {
 582                                 strbuf_reset(&buf);
 583                                 strbuf_addf(&buf, "branch.%s.%s",
 584                                                 item->string, *k);
 585                                 if (git_config_set(buf.buf, NULL)) {
 586                                         strbuf_release(&buf);
 587                                         return -1;
 588                                 }
 589                         }
 590                 }
 591         }
 592
 593         /*
 594          * We cannot just pass a function to for_each_ref() which deletes
 595          * the branches one by one, since for_each_ref() relies on cached
 596          * refs, which are invalidated when deleting a branch.
 597          */
 598         cb_data.remote = remote;
 599         result = for_each_ref(add_branch_for_removal, &cb_data);
 600         strbuf_release(&buf);
 601
 602         if (!result)
 603                 result = remove_branches(&branches);
 604         string_list_clear(&branches, 1);
 605
 606         if (skipped.nr) {
 607                 fprintf(stderr, skipped.nr == 1 ?
 608                         "Note: A non-remote branch was not removed; "
 609                         "to delete it, use:\n" :
 610                         "Note: Non-remote branches were not removed; "
 611                         "to delete them, use:\n");
 612                 for (i = 0; i < skipped.nr; i++)
 613                         fprintf(stderr, "  git branch -d %s\n",
 614                                 skipped.items[i].string);
 615         }
 616         string_list_clear(&skipped, 0);
 617
 618         return result;
 619 }
 620
 621 static void show_list(const char *title, struct string_list *list,
 622                       const char *extra_arg)
 623 {
 624         int i;
 625
 626         if (!list->nr)
 627                 return;
 628
 629         printf(title, list->nr > 1 ? "es" : "", extra_arg);
 630         printf("\n");
 631         for (i = 0; i < list->nr; i++)
 632                 printf("    %s\n", list->items[i].string);
 633 }
 634
 635 static int get_remote_ref_states(const char *name,
 636                                  struct ref_states *states,
 637                                  int query)
 638 {
 639         struct transport *transport;
 640         const struct ref *ref;
 641
 642         states->remote = remote_get(name);
 643         if (!states->remote)
 644                 return error("No such remote: %s", name);
 645
 646         read_branches();
 647
 648         if (query) {
 649                 transport = transport_get(NULL, states->remote->url_nr > 0 ?
 650                         states->remote->url[0] : NULL);
 651                 ref = transport_get_remote_refs(transport);
 652                 transport_disconnect(transport);
 653
 654                 get_ref_states(ref, states);
 655         }
 656
 657         return 0;
 658 }
 659
 660 static int append_ref_to_tracked_list(const char *refname,
 661         const unsigned char *sha1, int flags, void *cb_data)
 662 {
 663         struct ref_states *states = cb_data;
 664         struct refspec refspec;
 665
 666         memset(&refspec, 0, sizeof(refspec));
 667         refspec.dst = (char *)refname;
 668         if (!remote_find_tracking(states->remote, &refspec))
 669                 string_list_append(abbrev_branch(refspec.src), &states->tracked);
 670
 671         return 0;
 672 }
 673
 674 static int show(int argc, const char **argv)
 675 {
 676         int no_query = 0, result = 0;
 677         struct option options[] = {
 678                 OPT_GROUP("show specific options"),
 679                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 680                 OPT_END()
 681         };
 682         struct ref_states states;
 683
 684         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 685
 686         if (argc < 1)
 687                 return show_all();
 688
 689         memset(&states, 0, sizeof(states));
 690         for (; argc; argc--, argv++) {
 691                 int i;
 692
 693                 get_remote_ref_states(*argv, &states, !no_query);
 694
 695                 printf("* remote %s\n  URL: %s\n", *argv,
 696                         states.remote->url_nr > 0 ?
 697                                 states.remote->url[0] : "(no URL)");
 698
 699                 for (i = 0; i < branch_list.nr; i++) {
 700                         struct string_list_item *branch = branch_list.items + i;
 701                         struct branch_info *info = branch->util;
 702                         int j;
 703
 704                         if (!info->merge.nr || strcmp(*argv, info->remote))
 705                                 continue;
 706                         printf("  Remote branch%s merged with 'git pull' "
 707                                 "while on branch %s\n   ",
 708                                 info->merge.nr > 1 ? "es" : "",
 709                                 branch->string);
 710                         for (j = 0; j < info->merge.nr; j++)
 711                                 printf(" %s", info->merge.items[j].string);
 712                         printf("\n");
 713                 }
 714
 715                 if (!no_query) {
 716                         show_list("  New remote branch%s (next fetch "
 717                                 "will store in remotes/%s)",
 718                                 &states.new, states.remote->name);
 719                         show_list("  Stale tracking branch%s (use 'git remote "
 720                                 "prune')", &states.stale, "");
 721                 }
 722
 723                 if (no_query)
 724                         for_each_ref(append_ref_to_tracked_list, &states);
 725                 show_list("  Tracked remote branch%s", &states.tracked, "");
 726
 727                 if (states.remote->push_refspec_nr) {
 728                         printf("  Local branch%s pushed with 'git push'\n",
 729                                 states.remote->push_refspec_nr > 1 ?
 730                                         "es" : "");
 731                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 732                                 struct refspec *spec = states.remote->push + i;
 733                                 printf("    %s%s%s%s\n",
 734                                        spec->force ? "+" : "",
 735                                        abbrev_branch(spec->src),
 736                                        spec->dst ? ":" : "",
 737                                        spec->dst ? abbrev_branch(spec->dst) : "");
 738                         }
 739                 }
 740
 741                 /* NEEDSWORK: free remote */
 742                 string_list_clear(&states.new, 0);
 743                 string_list_clear(&states.stale, 0);
 744                 string_list_clear(&states.tracked, 0);
 745         }
 746
 747         return result;
 748 }
 749
 750 static int prune(int argc, const char **argv)
 751 {
 752         int dry_run = 0, result = 0;
 753         struct option options[] = {
 754                 OPT_GROUP("prune specific options"),
 755                 OPT__DRY_RUN(&dry_run),
 756                 OPT_END()
 757         };
 758         struct ref_states states;
 759
 760         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 761
 762         if (argc < 1)
 763                 usage_with_options(builtin_remote_usage, options);
 764
 765         memset(&states, 0, sizeof(states));
 766         for (; argc; argc--, argv++) {
 767                 int i;
 768
 769                 get_remote_ref_states(*argv, &states, 1);
 770
 771                 if (states.stale.nr) {
 772                         printf("Pruning %s\n", *argv);
 773                         printf("URL: %s\n",
 774                                states.remote->url_nr
 775                                ? states.remote->url[0]
 776                                : "(no URL)");
 777                 }
 778
 779                 for (i = 0; i < states.stale.nr; i++) {
 780                         const char *refname = states.stale.items[i].util;
 781
 782                         if (!dry_run)
 783                                 result |= delete_ref(refname, NULL, 0);
 784
 785                         printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
 786                                abbrev_ref(refname, "refs/remotes/"));
 787                 }
 788
 789                 /* NEEDSWORK: free remote */
 790                 string_list_clear(&states.new, 0);
 791                 string_list_clear(&states.stale, 0);
 792                 string_list_clear(&states.tracked, 0);
 793         }
 794
 795         return result;
 796 }
 797
 798 static int get_one_remote_for_update(struct remote *remote, void *priv)
 799 {
 800         struct string_list *list = priv;
 801         if (!remote->skip_default_update)
 802                 string_list_append(remote->name, list);
 803         return 0;
 804 }
 805
 806 struct remote_group {
 807         const char *name;
 808         struct string_list *list;
 809 } remote_group;
 810
 811 static int get_remote_group(const char *key, const char *value, void *cb)
 812 {
 813         if (!prefixcmp(key, "remotes.") &&
 814                         !strcmp(key + 8, remote_group.name)) {
 815                 /* split list by white space */
 816                 int space = strcspn(value, " \t\n");
 817                 while (*value) {
 818                         if (space > 1)
 819                                 string_list_append(xstrndup(value, space),
 820                                                 remote_group.list);
 821                         value += space + (value[space] != '\0');
 822                         space = strcspn(value, " \t\n");
 823                 }
 824         }
 825
 826         return 0;
 827 }
 828
 829 static int update(int argc, const char **argv)
 830 {
 831         int i, result = 0;
 832         struct string_list list = { NULL, 0, 0, 0 };
 833         static const char *default_argv[] = { NULL, "default", NULL };
 834
 835         if (argc < 2) {
 836                 argc = 2;
 837                 argv = default_argv;
 838         }
 839
 840         remote_group.list = &list;
 841         for (i = 1; i < argc; i++) {
 842                 remote_group.name = argv[i];
 843                 result = git_config(get_remote_group, NULL);
 844         }
 845
 846         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 847                 result = for_each_remote(get_one_remote_for_update, &list);
 848
 849         for (i = 0; i < list.nr; i++)
 850                 result |= fetch_remote(list.items[i].string);
 851
 852         /* all names were strdup()ed or strndup()ed */
 853         list.strdup_strings = 1;
 854         string_list_clear(&list, 0);
 855
 856         return result;
 857 }
 858
 859 static int get_one_entry(struct remote *remote, void *priv)
 860 {
 861         struct string_list *list = priv;
 862
 863         if (remote->url_nr > 0) {
 864                 int i;
 865
 866                 for (i = 0; i < remote->url_nr; i++)
 867                         string_list_append(remote->name, list)->util = (void *)remote->url[i];
 868         } else
 869                 string_list_append(remote->name, list)->util = NULL;
 870
 871         return 0;
 872 }
 873
 874 static int show_all(void)
 875 {
 876         struct string_list list = { NULL, 0, 0 };
 877         int result = for_each_remote(get_one_entry, &list);
 878
 879         if (!result) {
 880                 int i;
 881
 882                 sort_string_list(&list);
 883                 for (i = 0; i < list.nr; i++) {
 884                         struct string_list_item *item = list.items + i;
 885                         if (verbose)
 886                                 printf("%s\t%s\n", item->string,
 887                                         item->util ? (const char *)item->util : "");
 888                         else {
 889                                 if (i && !strcmp((item - 1)->string, item->string))
 890                                         continue;
 891                                 printf("%s\n", item->string);
 892                         }
 893                 }
 894         }
 895         return result;
 896 }
 897
 898 int cmd_remote(int argc, const char **argv, const char *prefix)
 899 {
 900         struct option options[] = {
 901                 OPT__VERBOSE(&verbose),
 902                 OPT_END()
 903         };
 904         int result;
 905
 906         argc = parse_options(argc, argv, options, builtin_remote_usage,
 907                 PARSE_OPT_STOP_AT_NON_OPTION);
 908
 909         if (argc < 1)
 910                 result = show_all();
 911         else if (!strcmp(argv[0], "add"))
 912                 result = add(argc, argv);
 913         else if (!strcmp(argv[0], "rename"))
 914                 result = mv(argc, argv);
 915         else if (!strcmp(argv[0], "rm"))
 916                 result = rm(argc, argv);
 917         else if (!strcmp(argv[0], "show"))
 918                 result = show(argc, argv);
 919         else if (!strcmp(argv[0], "prune"))
 920                 result = prune(argc, argv);
 921         else if (!strcmp(argv[0], "update"))
 922                 result = update(argc, argv);
 923         else {
 924                 error("Unknown subcommand: %s", argv[0]);
 925                 usage_with_options(builtin_remote_usage, options);
 926         }
 927
 928         return result ? 1 : 0;
 929 }