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 #define GET_REF_STATES (1<<0)
  22 #define GET_HEAD_NAMES (1<<1)
  23
  24 static int verbose;
  25
  26 static int show_all(void);
  27
  28 static inline int postfixcmp(const char *string, const char *postfix)
  29 {
  30         int len1 = strlen(string), len2 = strlen(postfix);
  31         if (len1 < len2)
  32                 return 1;
  33         return strcmp(string + len1 - len2, postfix);
  34 }
  35
  36 static int opt_parse_track(const struct option *opt, const char *arg, int not)
  37 {
  38         struct string_list *list = opt->value;
  39         if (not)
  40                 string_list_clear(list, 0);
  41         else
  42                 string_list_append(arg, list);
  43         return 0;
  44 }
  45
  46 static int fetch_remote(const char *name)
  47 {
  48         const char *argv[] = { "fetch", name, NULL, NULL };
  49         if (verbose) {
  50                 argv[1] = "-v";
  51                 argv[2] = name;
  52         }
  53         printf("Updating %s\n", name);
  54         if (run_command_v_opt(argv, RUN_GIT_CMD))
  55                 return error("Could not fetch %s", name);
  56         return 0;
  57 }
  58
  59 static int add(int argc, const char **argv)
  60 {
  61         int fetch = 0, mirror = 0;
  62         struct string_list track = { NULL, 0, 0 };
  63         const char *master = NULL;
  64         struct remote *remote;
  65         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT;
  66         const char *name, *url;
  67         int i;
  68
  69         struct option options[] = {
  70                 OPT_GROUP("add specific options"),
  71                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  72                 OPT_CALLBACK('t', "track", &track, "branch",
  73                         "branch(es) to track", opt_parse_track),
  74                 OPT_STRING('m', "master", &master, "branch", "master branch"),
  75                 OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  76                 OPT_END()
  77         };
  78
  79         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  80
  81         if (argc < 2)
  82                 usage_with_options(builtin_remote_usage, options);
  83
  84         name = argv[0];
  85         url = argv[1];
  86
  87         remote = remote_get(name);
  88         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  89                         remote->fetch_refspec_nr))
  90                 die("remote %s already exists.", name);
  91
  92         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  93         if (!valid_fetch_refspec(buf2.buf))
  94                 die("'%s' is not a valid remote name", name);
  95
  96         strbuf_addf(&buf, "remote.%s.url", name);
  97         if (git_config_set(buf.buf, url))
  98                 return 1;
  99
 100         strbuf_reset(&buf);
 101         strbuf_addf(&buf, "remote.%s.fetch", name);
 102
 103         if (track.nr == 0)
 104                 string_list_append("*", &track);
 105         for (i = 0; i < track.nr; i++) {
 106                 struct string_list_item *item = track.items + i;
 107
 108                 strbuf_reset(&buf2);
 109                 strbuf_addch(&buf2, '+');
 110                 if (mirror)
 111                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 112                                         item->string, item->string);
 113                 else
 114                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 115                                         item->string, name, item->string);
 116                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 117                         return 1;
 118         }
 119
 120         if (mirror) {
 121                 strbuf_reset(&buf);
 122                 strbuf_addf(&buf, "remote.%s.mirror", name);
 123                 if (git_config_set(buf.buf, "true"))
 124                         return 1;
 125         }
 126
 127         if (fetch && fetch_remote(name))
 128                 return 1;
 129
 130         if (master) {
 131                 strbuf_reset(&buf);
 132                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 133
 134                 strbuf_reset(&buf2);
 135                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 136
 137                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 138                         return error("Could not setup master '%s'", master);
 139         }
 140
 141         strbuf_release(&buf);
 142         strbuf_release(&buf2);
 143         string_list_clear(&track, 0);
 144
 145         return 0;
 146 }
 147
 148 struct branch_info {
 149         char *remote_name;
 150         struct string_list merge;
 151 };
 152
 153 static struct string_list branch_list;
 154
 155 static const char *abbrev_ref(const char *name, const char *prefix)
 156 {
 157         const char *abbrev = skip_prefix(name, prefix);
 158         if (abbrev)
 159                 return abbrev;
 160         return name;
 161 }
 162 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 163
 164 static int config_read_branches(const char *key, const char *value, void *cb)
 165 {
 166         if (!prefixcmp(key, "branch.")) {
 167                 char *name;
 168                 struct string_list_item *item;
 169                 struct branch_info *info;
 170                 enum { REMOTE, MERGE } type;
 171
 172                 key += 7;
 173                 if (!postfixcmp(key, ".remote")) {
 174                         name = xstrndup(key, strlen(key) - 7);
 175                         type = REMOTE;
 176                 } else if (!postfixcmp(key, ".merge")) {
 177                         name = xstrndup(key, strlen(key) - 6);
 178                         type = MERGE;
 179                 } else
 180                         return 0;
 181
 182                 item = string_list_insert(name, &branch_list);
 183
 184                 if (!item->util)
 185                         item->util = xcalloc(sizeof(struct branch_info), 1);
 186                 info = item->util;
 187                 if (type == REMOTE) {
 188                         if (info->remote_name)
 189                                 warning("more than one branch.%s", key);
 190                         info->remote_name = xstrdup(value);
 191                 } else {
 192                         char *space = strchr(value, ' ');
 193                         value = abbrev_branch(value);
 194                         while (space) {
 195                                 char *merge;
 196                                 merge = xstrndup(value, space - value);
 197                                 string_list_append(merge, &info->merge);
 198                                 value = abbrev_branch(space + 1);
 199                                 space = strchr(value, ' ');
 200                         }
 201                         string_list_append(xstrdup(value), &info->merge);
 202                 }
 203         }
 204         return 0;
 205 }
 206
 207 static void read_branches(void)
 208 {
 209         if (branch_list.nr)
 210                 return;
 211         git_config(config_read_branches, NULL);
 212 }
 213
 214 struct ref_states {
 215         struct remote *remote;
 216         struct string_list new, stale, tracked, heads;
 217 };
 218
 219 static int handle_one_branch(const char *refname,
 220         const unsigned char *sha1, int flags, void *cb_data)
 221 {
 222         struct ref_states *states = cb_data;
 223         struct refspec refspec;
 224
 225         memset(&refspec, 0, sizeof(refspec));
 226         refspec.dst = (char *)refname;
 227         if (!remote_find_tracking(states->remote, &refspec)) {
 228                 struct string_list_item *item;
 229                 const char *name = abbrev_branch(refspec.src);
 230                 /* symbolic refs pointing nowhere were handled already */
 231                 if ((flags & REF_ISSYMREF) ||
 232                     string_list_has_string(&states->tracked, name) ||
 233                     string_list_has_string(&states->new, 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 *remote_refs, struct ref_states *states)
 242 {
 243         struct ref *fetch_map = NULL, **tail = &fetch_map;
 244         struct ref *ref;
 245         int i;
 246
 247         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 248                 if (get_fetch_map(remote_refs, states->remote->fetch + i, &tail, 1))
 249                         die("Could not get fetch map for refspec %s",
 250                                 states->remote->fetch_refspec[i]);
 251
 252         states->new.strdup_strings = states->tracked.strdup_strings = 1;
 253         for (ref = fetch_map; ref; ref = ref->next) {
 254                 unsigned char sha1[20];
 255                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 256                         string_list_append(abbrev_branch(ref->name), &states->new);
 257                 else
 258                         string_list_append(abbrev_branch(ref->name), &states->tracked);
 259         }
 260         free_refs(fetch_map);
 261
 262         sort_string_list(&states->new);
 263         sort_string_list(&states->tracked);
 264         for_each_ref(handle_one_branch, states);
 265         sort_string_list(&states->stale);
 266
 267         return 0;
 268 }
 269
 270 static int get_head_names(const struct ref *remote_refs, struct ref_states *states)
 271 {
 272         struct ref *ref, *matches;
 273         struct ref *fetch_map = NULL, **fetch_map_tail = &fetch_map;
 274         struct refspec refspec;
 275
 276         refspec.force = 0;
 277         refspec.pattern = 1;
 278         refspec.src = refspec.dst = "refs/heads/";
 279         states->heads.strdup_strings = 1;
 280         get_fetch_map(remote_refs, &refspec, &fetch_map_tail, 0);
 281         matches = guess_remote_head(find_ref_by_name(remote_refs, "HEAD"),
 282                                     fetch_map, 1);
 283         for(ref = matches; ref; ref = ref->next)
 284                 string_list_append(abbrev_branch(ref->name), &states->heads);
 285
 286         free_refs(fetch_map);
 287         free_refs(matches);
 288
 289         return 0;
 290 }
 291
 292 struct known_remote {
 293         struct known_remote *next;
 294         struct remote *remote;
 295 };
 296
 297 struct known_remotes {
 298         struct remote *to_delete;
 299         struct known_remote *list;
 300 };
 301
 302 static int add_known_remote(struct remote *remote, void *cb_data)
 303 {
 304         struct known_remotes *all = cb_data;
 305         struct known_remote *r;
 306
 307         if (!strcmp(all->to_delete->name, remote->name))
 308                 return 0;
 309
 310         r = xmalloc(sizeof(*r));
 311         r->remote = remote;
 312         r->next = all->list;
 313         all->list = r;
 314         return 0;
 315 }
 316
 317 struct branches_for_remote {
 318         struct remote *remote;
 319         struct string_list *branches, *skipped;
 320         struct known_remotes *keep;
 321 };
 322
 323 static int add_branch_for_removal(const char *refname,
 324         const unsigned char *sha1, int flags, void *cb_data)
 325 {
 326         struct branches_for_remote *branches = cb_data;
 327         struct refspec refspec;
 328         struct string_list_item *item;
 329         struct known_remote *kr;
 330
 331         memset(&refspec, 0, sizeof(refspec));
 332         refspec.dst = (char *)refname;
 333         if (remote_find_tracking(branches->remote, &refspec))
 334                 return 0;
 335
 336         /* don't delete a branch if another remote also uses it */
 337         for (kr = branches->keep->list; kr; kr = kr->next) {
 338                 memset(&refspec, 0, sizeof(refspec));
 339                 refspec.dst = (char *)refname;
 340                 if (!remote_find_tracking(kr->remote, &refspec))
 341                         return 0;
 342         }
 343
 344         /* don't delete non-remote refs */
 345         if (prefixcmp(refname, "refs/remotes")) {
 346                 /* advise user how to delete local branches */
 347                 if (!prefixcmp(refname, "refs/heads/"))
 348                         string_list_append(abbrev_branch(refname),
 349                                            branches->skipped);
 350                 /* silently skip over other non-remote refs */
 351                 return 0;
 352         }
 353
 354         /* make sure that symrefs are deleted */
 355         if (flags & REF_ISSYMREF)
 356                 return unlink(git_path("%s", refname));
 357
 358         item = string_list_append(refname, branches->branches);
 359         item->util = xmalloc(20);
 360         hashcpy(item->util, sha1);
 361
 362         return 0;
 363 }
 364
 365 struct rename_info {
 366         const char *old;
 367         const char *new;
 368         struct string_list *remote_branches;
 369 };
 370
 371 static int read_remote_branches(const char *refname,
 372         const unsigned char *sha1, int flags, void *cb_data)
 373 {
 374         struct rename_info *rename = cb_data;
 375         struct strbuf buf = STRBUF_INIT;
 376         struct string_list_item *item;
 377         int flag;
 378         unsigned char orig_sha1[20];
 379         const char *symref;
 380
 381         strbuf_addf(&buf, "refs/remotes/%s", rename->old);
 382         if(!prefixcmp(refname, buf.buf)) {
 383                 item = string_list_append(xstrdup(refname), rename->remote_branches);
 384                 symref = resolve_ref(refname, orig_sha1, 1, &flag);
 385                 if (flag & REF_ISSYMREF)
 386                         item->util = xstrdup(symref);
 387                 else
 388                         item->util = NULL;
 389         }
 390
 391         return 0;
 392 }
 393
 394 static int migrate_file(struct remote *remote)
 395 {
 396         struct strbuf buf = STRBUF_INIT;
 397         int i;
 398         char *path = NULL;
 399
 400         strbuf_addf(&buf, "remote.%s.url", remote->name);
 401         for (i = 0; i < remote->url_nr; i++)
 402                 if (git_config_set_multivar(buf.buf, remote->url[i], "^$", 0))
 403                         return error("Could not append '%s' to '%s'",
 404                                         remote->url[i], buf.buf);
 405         strbuf_reset(&buf);
 406         strbuf_addf(&buf, "remote.%s.push", remote->name);
 407         for (i = 0; i < remote->push_refspec_nr; i++)
 408                 if (git_config_set_multivar(buf.buf, remote->push_refspec[i], "^$", 0))
 409                         return error("Could not append '%s' to '%s'",
 410                                         remote->push_refspec[i], buf.buf);
 411         strbuf_reset(&buf);
 412         strbuf_addf(&buf, "remote.%s.fetch", remote->name);
 413         for (i = 0; i < remote->fetch_refspec_nr; i++)
 414                 if (git_config_set_multivar(buf.buf, remote->fetch_refspec[i], "^$", 0))
 415                         return error("Could not append '%s' to '%s'",
 416                                         remote->fetch_refspec[i], buf.buf);
 417         if (remote->origin == REMOTE_REMOTES)
 418                 path = git_path("remotes/%s", remote->name);
 419         else if (remote->origin == REMOTE_BRANCHES)
 420                 path = git_path("branches/%s", remote->name);
 421         if (path && unlink(path))
 422                 warning("failed to remove '%s'", path);
 423         return 0;
 424 }
 425
 426 static int mv(int argc, const char **argv)
 427 {
 428         struct option options[] = {
 429                 OPT_END()
 430         };
 431         struct remote *oldremote, *newremote;
 432         struct strbuf buf = STRBUF_INIT, buf2 = STRBUF_INIT, buf3 = STRBUF_INIT;
 433         struct string_list remote_branches = { NULL, 0, 0, 0 };
 434         struct rename_info rename;
 435         int i;
 436
 437         if (argc != 3)
 438                 usage_with_options(builtin_remote_usage, options);
 439
 440         rename.old = argv[1];
 441         rename.new = argv[2];
 442         rename.remote_branches = &remote_branches;
 443
 444         oldremote = remote_get(rename.old);
 445         if (!oldremote)
 446                 die("No such remote: %s", rename.old);
 447
 448         if (!strcmp(rename.old, rename.new) && oldremote->origin != REMOTE_CONFIG)
 449                 return migrate_file(oldremote);
 450
 451         newremote = remote_get(rename.new);
 452         if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
 453                 die("remote %s already exists.", rename.new);
 454
 455         strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);
 456         if (!valid_fetch_refspec(buf.buf))
 457                 die("'%s' is not a valid remote name", rename.new);
 458
 459         strbuf_reset(&buf);
 460         strbuf_addf(&buf, "remote.%s", rename.old);
 461         strbuf_addf(&buf2, "remote.%s", rename.new);
 462         if (git_config_rename_section(buf.buf, buf2.buf) < 1)
 463                 return error("Could not rename config section '%s' to '%s'",
 464                                 buf.buf, buf2.buf);
 465
 466         strbuf_reset(&buf);
 467         strbuf_addf(&buf, "remote.%s.fetch", rename.new);
 468         if (git_config_set_multivar(buf.buf, NULL, NULL, 1))
 469                 return error("Could not remove config section '%s'", buf.buf);
 470         for (i = 0; i < oldremote->fetch_refspec_nr; i++) {
 471                 char *ptr;
 472
 473                 strbuf_reset(&buf2);
 474                 strbuf_addstr(&buf2, oldremote->fetch_refspec[i]);
 475                 ptr = strstr(buf2.buf, rename.old);
 476                 if (ptr)
 477                         strbuf_splice(&buf2, ptr-buf2.buf, strlen(rename.old),
 478                                         rename.new, strlen(rename.new));
 479                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 480                         return error("Could not append '%s'", buf.buf);
 481         }
 482
 483         read_branches();
 484         for (i = 0; i < branch_list.nr; i++) {
 485                 struct string_list_item *item = branch_list.items + i;
 486                 struct branch_info *info = item->util;
 487                 if (info->remote_name && !strcmp(info->remote_name, rename.old)) {
 488                         strbuf_reset(&buf);
 489                         strbuf_addf(&buf, "branch.%s.remote", item->string);
 490                         if (git_config_set(buf.buf, rename.new)) {
 491                                 return error("Could not set '%s'", buf.buf);
 492                         }
 493                 }
 494         }
 495
 496         /*
 497          * First remove symrefs, then rename the rest, finally create
 498          * the new symrefs.
 499          */
 500         for_each_ref(read_remote_branches, &rename);
 501         for (i = 0; i < remote_branches.nr; i++) {
 502                 struct string_list_item *item = remote_branches.items + i;
 503                 int flag = 0;
 504                 unsigned char sha1[20];
 505                 const char *symref;
 506
 507                 symref = resolve_ref(item->string, sha1, 1, &flag);
 508                 if (!(flag & REF_ISSYMREF))
 509                         continue;
 510                 if (delete_ref(item->string, NULL, REF_NODEREF))
 511                         die("deleting '%s' failed", item->string);
 512         }
 513         for (i = 0; i < remote_branches.nr; i++) {
 514                 struct string_list_item *item = remote_branches.items + i;
 515
 516                 if (item->util)
 517                         continue;
 518                 strbuf_reset(&buf);
 519                 strbuf_addstr(&buf, item->string);
 520                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 521                                 rename.new, strlen(rename.new));
 522                 strbuf_reset(&buf2);
 523                 strbuf_addf(&buf2, "remote: renamed %s to %s",
 524                                 item->string, buf.buf);
 525                 if (rename_ref(item->string, buf.buf, buf2.buf))
 526                         die("renaming '%s' failed", item->string);
 527         }
 528         for (i = 0; i < remote_branches.nr; i++) {
 529                 struct string_list_item *item = remote_branches.items + i;
 530
 531                 if (!item->util)
 532                         continue;
 533                 strbuf_reset(&buf);
 534                 strbuf_addstr(&buf, item->string);
 535                 strbuf_splice(&buf, strlen("refs/remotes/"), strlen(rename.old),
 536                                 rename.new, strlen(rename.new));
 537                 strbuf_reset(&buf2);
 538                 strbuf_addstr(&buf2, item->util);
 539                 strbuf_splice(&buf2, strlen("refs/remotes/"), strlen(rename.old),
 540                                 rename.new, strlen(rename.new));
 541                 strbuf_reset(&buf3);
 542                 strbuf_addf(&buf3, "remote: renamed %s to %s",
 543                                 item->string, buf.buf);
 544                 if (create_symref(buf.buf, buf2.buf, buf3.buf))
 545                         die("creating '%s' failed", buf.buf);
 546         }
 547         return 0;
 548 }
 549
 550 static int remove_branches(struct string_list *branches)
 551 {
 552         int i, result = 0;
 553         for (i = 0; i < branches->nr; i++) {
 554                 struct string_list_item *item = branches->items + i;
 555                 const char *refname = item->string;
 556                 unsigned char *sha1 = item->util;
 557
 558                 if (delete_ref(refname, sha1, 0))
 559                         result |= error("Could not remove branch %s", refname);
 560         }
 561         return result;
 562 }
 563
 564 static int rm(int argc, const char **argv)
 565 {
 566         struct option options[] = {
 567                 OPT_END()
 568         };
 569         struct remote *remote;
 570         struct strbuf buf = STRBUF_INIT;
 571         struct known_remotes known_remotes = { NULL, NULL };
 572         struct string_list branches = { NULL, 0, 0, 1 };
 573         struct string_list skipped = { NULL, 0, 0, 1 };
 574         struct branches_for_remote cb_data = {
 575                 NULL, &branches, &skipped, &known_remotes
 576         };
 577         int i, result;
 578
 579         if (argc != 2)
 580                 usage_with_options(builtin_remote_usage, options);
 581
 582         remote = remote_get(argv[1]);
 583         if (!remote)
 584                 die("No such remote: %s", argv[1]);
 585
 586         known_remotes.to_delete = remote;
 587         for_each_remote(add_known_remote, &known_remotes);
 588
 589         strbuf_addf(&buf, "remote.%s", remote->name);
 590         if (git_config_rename_section(buf.buf, NULL) < 1)
 591                 return error("Could not remove config section '%s'", buf.buf);
 592
 593         read_branches();
 594         for (i = 0; i < branch_list.nr; i++) {
 595                 struct string_list_item *item = branch_list.items + i;
 596                 struct branch_info *info = item->util;
 597                 if (info->remote_name && !strcmp(info->remote_name, remote->name)) {
 598                         const char *keys[] = { "remote", "merge", NULL }, **k;
 599                         for (k = keys; *k; k++) {
 600                                 strbuf_reset(&buf);
 601                                 strbuf_addf(&buf, "branch.%s.%s",
 602                                                 item->string, *k);
 603                                 if (git_config_set(buf.buf, NULL)) {
 604                                         strbuf_release(&buf);
 605                                         return -1;
 606                                 }
 607                         }
 608                 }
 609         }
 610
 611         /*
 612          * We cannot just pass a function to for_each_ref() which deletes
 613          * the branches one by one, since for_each_ref() relies on cached
 614          * refs, which are invalidated when deleting a branch.
 615          */
 616         cb_data.remote = remote;
 617         result = for_each_ref(add_branch_for_removal, &cb_data);
 618         strbuf_release(&buf);
 619
 620         if (!result)
 621                 result = remove_branches(&branches);
 622         string_list_clear(&branches, 1);
 623
 624         if (skipped.nr) {
 625                 fprintf(stderr, skipped.nr == 1 ?
 626                         "Note: A non-remote branch was not removed; "
 627                         "to delete it, use:\n" :
 628                         "Note: Non-remote branches were not removed; "
 629                         "to delete them, use:\n");
 630                 for (i = 0; i < skipped.nr; i++)
 631                         fprintf(stderr, "  git branch -d %s\n",
 632                                 skipped.items[i].string);
 633         }
 634         string_list_clear(&skipped, 0);
 635
 636         return result;
 637 }
 638
 639 static void show_list(const char *title, struct string_list *list,
 640                       const char *extra_arg)
 641 {
 642         int i;
 643
 644         if (!list->nr)
 645                 return;
 646
 647         printf(title, list->nr > 1 ? "es" : "", extra_arg);
 648         printf("\n");
 649         for (i = 0; i < list->nr; i++)
 650                 printf("    %s\n", list->items[i].string);
 651 }
 652
 653 static void free_remote_ref_states(struct ref_states *states)
 654 {
 655         string_list_clear(&states->new, 0);
 656         string_list_clear(&states->stale, 0);
 657         string_list_clear(&states->tracked, 0);
 658         string_list_clear(&states->heads, 0);
 659 }
 660
 661 static int append_ref_to_tracked_list(const char *refname,
 662         const unsigned char *sha1, int flags, void *cb_data)
 663 {
 664         struct ref_states *states = cb_data;
 665         struct refspec refspec;
 666
 667         if (flags & REF_ISSYMREF)
 668                 return 0;
 669
 670         memset(&refspec, 0, sizeof(refspec));
 671         refspec.dst = (char *)refname;
 672         if (!remote_find_tracking(states->remote, &refspec))
 673                 string_list_append(abbrev_branch(refspec.src), &states->tracked);
 674
 675         return 0;
 676 }
 677
 678 static int get_remote_ref_states(const char *name,
 679                                  struct ref_states *states,
 680                                  int query)
 681 {
 682         struct transport *transport;
 683         const struct ref *remote_refs;
 684
 685         states->remote = remote_get(name);
 686         if (!states->remote)
 687                 return error("No such remote: %s", name);
 688
 689         read_branches();
 690
 691         if (query) {
 692                 transport = transport_get(NULL, states->remote->url_nr > 0 ?
 693                         states->remote->url[0] : NULL);
 694                 remote_refs = transport_get_remote_refs(transport);
 695                 transport_disconnect(transport);
 696
 697                 if (query & GET_REF_STATES)
 698                         get_ref_states(remote_refs, states);
 699                 if (query & GET_HEAD_NAMES)
 700                         get_head_names(remote_refs, states);
 701         } else {
 702                 for_each_ref(append_ref_to_tracked_list, states);
 703                 sort_string_list(&states->tracked);
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int show(int argc, const char **argv)
 710 {
 711         int no_query = 0, result = 0, query_flag = 0;
 712         struct option options[] = {
 713                 OPT_GROUP("show specific options"),
 714                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 715                 OPT_END()
 716         };
 717         struct ref_states states;
 718
 719         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 720
 721         if (argc < 1)
 722                 return show_all();
 723
 724         if (!no_query)
 725                 query_flag = (GET_REF_STATES | GET_HEAD_NAMES);
 726
 727         memset(&states, 0, sizeof(states));
 728         for (; argc; argc--, argv++) {
 729                 int i;
 730
 731                 get_remote_ref_states(*argv, &states, query_flag);
 732
 733                 printf("* remote %s\n  URL: %s\n", *argv,
 734                         states.remote->url_nr > 0 ?
 735                                 states.remote->url[0] : "(no URL)");
 736                 if (no_query)
 737                         printf("  HEAD branch: (not queried)\n");
 738                 else if (!states.heads.nr)
 739                         printf("  HEAD branch: (unknown)\n");
 740                 else if (states.heads.nr == 1)
 741                         printf("  HEAD branch: %s\n", states.heads.items[0].string);
 742                 else {
 743                         printf("  HEAD branch (remote HEAD is ambiguous,"
 744                                " may be one of the following):\n");
 745                         for (i = 0; i < states.heads.nr; i++)
 746                                 printf("    %s\n", states.heads.items[i].string);
 747                 }
 748
 749                 for (i = 0; i < branch_list.nr; i++) {
 750                         struct string_list_item *branch = branch_list.items + i;
 751                         struct branch_info *info = branch->util;
 752                         int j;
 753
 754                         if (!info->merge.nr || strcmp(*argv, info->remote_name))
 755                                 continue;
 756                         printf("  Remote branch%s merged with 'git pull' "
 757                                 "while on branch %s\n   ",
 758                                 info->merge.nr > 1 ? "es" : "",
 759                                 branch->string);
 760                         for (j = 0; j < info->merge.nr; j++)
 761                                 printf(" %s", info->merge.items[j].string);
 762                         printf("\n");
 763                 }
 764
 765                 if (!no_query) {
 766                         show_list("  New remote branch%s (next fetch "
 767                                 "will store in remotes/%s)",
 768                                 &states.new, states.remote->name);
 769                         show_list("  Stale tracking branch%s (use 'git remote "
 770                                 "prune')", &states.stale, "");
 771                 }
 772
 773                 show_list("  Tracked remote branch%s", &states.tracked, "");
 774
 775                 if (states.remote->push_refspec_nr) {
 776                         printf("  Local branch%s pushed with 'git push'\n",
 777                                 states.remote->push_refspec_nr > 1 ?
 778                                         "es" : "");
 779                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 780                                 struct refspec *spec = states.remote->push + i;
 781                                 printf("    %s%s%s%s\n",
 782                                        spec->force ? "+" : "",
 783                                        abbrev_branch(spec->src),
 784                                        spec->dst ? ":" : "",
 785                                        spec->dst ? abbrev_branch(spec->dst) : "");
 786                         }
 787                 }
 788
 789                 free_remote_ref_states(&states);
 790         }
 791
 792         return result;
 793 }
 794
 795 static int prune(int argc, const char **argv)
 796 {
 797         int dry_run = 0, result = 0;
 798         struct option options[] = {
 799                 OPT_GROUP("prune specific options"),
 800                 OPT__DRY_RUN(&dry_run),
 801                 OPT_END()
 802         };
 803         struct ref_states states;
 804         const char *dangling_msg;
 805
 806         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 807
 808         if (argc < 1)
 809                 usage_with_options(builtin_remote_usage, options);
 810
 811         dangling_msg = (dry_run
 812                         ? " %s will become dangling!\n"
 813                         : " %s has become dangling!\n");
 814
 815         memset(&states, 0, sizeof(states));
 816         for (; argc; argc--, argv++) {
 817                 int i;
 818
 819                 get_remote_ref_states(*argv, &states, GET_REF_STATES);
 820
 821                 if (states.stale.nr) {
 822                         printf("Pruning %s\n", *argv);
 823                         printf("URL: %s\n",
 824                                states.remote->url_nr
 825                                ? states.remote->url[0]
 826                                : "(no URL)");
 827                 }
 828
 829                 for (i = 0; i < states.stale.nr; i++) {
 830                         const char *refname = states.stale.items[i].util;
 831
 832                         if (!dry_run)
 833                                 result |= delete_ref(refname, NULL, 0);
 834
 835                         printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
 836                                abbrev_ref(refname, "refs/remotes/"));
 837                         warn_dangling_symref(dangling_msg, refname);
 838                 }
 839
 840                 free_remote_ref_states(&states);
 841         }
 842
 843         return result;
 844 }
 845
 846 static int get_one_remote_for_update(struct remote *remote, void *priv)
 847 {
 848         struct string_list *list = priv;
 849         if (!remote->skip_default_update)
 850                 string_list_append(remote->name, list);
 851         return 0;
 852 }
 853
 854 struct remote_group {
 855         const char *name;
 856         struct string_list *list;
 857 } remote_group;
 858
 859 static int get_remote_group(const char *key, const char *value, void *cb)
 860 {
 861         if (!prefixcmp(key, "remotes.") &&
 862                         !strcmp(key + 8, remote_group.name)) {
 863                 /* split list by white space */
 864                 int space = strcspn(value, " \t\n");
 865                 while (*value) {
 866                         if (space > 1)
 867                                 string_list_append(xstrndup(value, space),
 868                                                 remote_group.list);
 869                         value += space + (value[space] != '\0');
 870                         space = strcspn(value, " \t\n");
 871                 }
 872         }
 873
 874         return 0;
 875 }
 876
 877 static int update(int argc, const char **argv)
 878 {
 879         int i, result = 0;
 880         struct string_list list = { NULL, 0, 0, 0 };
 881         static const char *default_argv[] = { NULL, "default", NULL };
 882
 883         if (argc < 2) {
 884                 argc = 2;
 885                 argv = default_argv;
 886         }
 887
 888         remote_group.list = &list;
 889         for (i = 1; i < argc; i++) {
 890                 remote_group.name = argv[i];
 891                 result = git_config(get_remote_group, NULL);
 892         }
 893
 894         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 895                 result = for_each_remote(get_one_remote_for_update, &list);
 896
 897         for (i = 0; i < list.nr; i++)
 898                 result |= fetch_remote(list.items[i].string);
 899
 900         /* all names were strdup()ed or strndup()ed */
 901         list.strdup_strings = 1;
 902         string_list_clear(&list, 0);
 903
 904         return result;
 905 }
 906
 907 static int get_one_entry(struct remote *remote, void *priv)
 908 {
 909         struct string_list *list = priv;
 910
 911         if (remote->url_nr > 0) {
 912                 int i;
 913
 914                 for (i = 0; i < remote->url_nr; i++)
 915                         string_list_append(remote->name, list)->util = (void *)remote->url[i];
 916         } else
 917                 string_list_append(remote->name, list)->util = NULL;
 918
 919         return 0;
 920 }
 921
 922 static int show_all(void)
 923 {
 924         struct string_list list = { NULL, 0, 0 };
 925         int result = for_each_remote(get_one_entry, &list);
 926
 927         if (!result) {
 928                 int i;
 929
 930                 sort_string_list(&list);
 931                 for (i = 0; i < list.nr; i++) {
 932                         struct string_list_item *item = list.items + i;
 933                         if (verbose)
 934                                 printf("%s\t%s\n", item->string,
 935                                         item->util ? (const char *)item->util : "");
 936                         else {
 937                                 if (i && !strcmp((item - 1)->string, item->string))
 938                                         continue;
 939                                 printf("%s\n", item->string);
 940                         }
 941                 }
 942         }
 943         return result;
 944 }
 945
 946 int cmd_remote(int argc, const char **argv, const char *prefix)
 947 {
 948         struct option options[] = {
 949                 OPT__VERBOSE(&verbose),
 950                 OPT_END()
 951         };
 952         int result;
 953
 954         argc = parse_options(argc, argv, options, builtin_remote_usage,
 955                 PARSE_OPT_STOP_AT_NON_OPTION);
 956
 957         if (argc < 1)
 958                 result = show_all();
 959         else if (!strcmp(argv[0], "add"))
 960                 result = add(argc, argv);
 961         else if (!strcmp(argv[0], "rename"))
 962                 result = mv(argc, argv);
 963         else if (!strcmp(argv[0], "rm"))
 964                 result = rm(argc, argv);
 965         else if (!strcmp(argv[0], "show"))
 966                 result = show(argc, argv);
 967         else if (!strcmp(argv[0], "prune"))
 968                 result = prune(argc, argv);
 969         else if (!strcmp(argv[0], "update"))
 970                 result = update(argc, argv);
 971         else {
 972                 error("Unknown subcommand: %s", argv[0]);
 973                 usage_with_options(builtin_remote_usage, options);
 974         }
 975
 976         return result ? 1 : 0;
 977 }