builtin-remote.c

   1 #include "cache.h"
   2 #include "parse-options.h"
   3 #include "transport.h"
   4 #include "remote.h"
   5 #include "path-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",
  12         "git remote add <name> <url>",
  13         "git remote rm <name>",
  14         "git remote show <name>",
  15         "git remote prune <name>",
  16         "git remote update [group]",
  17         NULL
  18 };
  19
  20 static int verbose;
  21
  22 static int show_all(void);
  23
  24 static inline int postfixcmp(const char *string, const char *postfix)
  25 {
  26         int len1 = strlen(string), len2 = strlen(postfix);
  27         if (len1 < len2)
  28                 return 1;
  29         return strcmp(string + len1 - len2, postfix);
  30 }
  31
  32 static inline const char *skip_prefix(const char *name, const char *prefix)
  33 {
  34         return !name ? "" :
  35                 prefixcmp(name, prefix) ?  name : name + strlen(prefix);
  36 }
  37
  38 static int opt_parse_track(const struct option *opt, const char *arg, int not)
  39 {
  40         struct path_list *list = opt->value;
  41         if (not)
  42                 path_list_clear(list, 0);
  43         else
  44                 path_list_append(arg, list);
  45         return 0;
  46 }
  47
  48 static int fetch_remote(const char *name)
  49 {
  50         const char *argv[] = { "fetch", name, NULL };
  51         printf("Updating %s\n", name);
  52         if (run_command_v_opt(argv, RUN_GIT_CMD))
  53                 return error("Could not fetch %s", name);
  54         return 0;
  55 }
  56
  57 static int add(int argc, const char **argv)
  58 {
  59         int fetch = 0, mirror = 0;
  60         struct path_list track = { NULL, 0, 0 };
  61         const char *master = NULL;
  62         struct remote *remote;
  63         struct strbuf buf, buf2;
  64         const char *name, *url;
  65         int i;
  66
  67         struct option options[] = {
  68                 OPT_GROUP("add specific options"),
  69                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  70                 OPT_CALLBACK('t', "track", &track, "branch",
  71                         "branch(es) to track", opt_parse_track),
  72                 OPT_STRING('m', "master", &master, "branch", "master branch"),
  73                 OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  74                 OPT_END()
  75         };
  76
  77         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  78
  79         if (argc < 2)
  80                 usage_with_options(builtin_remote_usage, options);
  81
  82         name = argv[0];
  83         url = argv[1];
  84
  85         remote = remote_get(name);
  86         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  87                         remote->fetch_refspec_nr))
  88                 die("remote %s already exists.", name);
  89
  90         strbuf_init(&buf, 0);
  91         strbuf_init(&buf2, 0);
  92
  93         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  94         if (!valid_fetch_refspec(buf2.buf))
  95                 die("'%s' is not a valid remote name", name);
  96
  97         strbuf_addf(&buf, "remote.%s.url", name);
  98         if (git_config_set(buf.buf, url))
  99                 return 1;
 100
 101         strbuf_reset(&buf);
 102         strbuf_addf(&buf, "remote.%s.fetch", name);
 103
 104         if (track.nr == 0)
 105                 path_list_append("*", &track);
 106         for (i = 0; i < track.nr; i++) {
 107                 struct path_list_item *item = track.items + i;
 108
 109                 strbuf_reset(&buf2);
 110                 if (mirror)
 111                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 112                                         item->path, item->path);
 113                 else
 114                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 115                                         item->path, name, item->path);
 116                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 117                         return 1;
 118         }
 119
 120         if (fetch && fetch_remote(name))
 121                 return 1;
 122
 123         if (master) {
 124                 strbuf_reset(&buf);
 125                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 126
 127                 strbuf_reset(&buf2);
 128                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 129
 130                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 131                         return error("Could not setup master '%s'", master);
 132         }
 133
 134         strbuf_release(&buf);
 135         strbuf_release(&buf2);
 136         path_list_clear(&track, 0);
 137
 138         return 0;
 139 }
 140
 141 struct branch_info {
 142         char *remote;
 143         struct path_list merge;
 144 };
 145
 146 static struct path_list branch_list;
 147
 148 static int config_read_branches(const char *key, const char *value)
 149 {
 150         if (!prefixcmp(key, "branch.")) {
 151                 char *name;
 152                 struct path_list_item *item;
 153                 struct branch_info *info;
 154                 enum { REMOTE, MERGE } type;
 155
 156                 key += 7;
 157                 if (!postfixcmp(key, ".remote")) {
 158                         name = xstrndup(key, strlen(key) - 7);
 159                         type = REMOTE;
 160                 } else if (!postfixcmp(key, ".merge")) {
 161                         name = xstrndup(key, strlen(key) - 6);
 162                         type = MERGE;
 163                 } else
 164                         return 0;
 165
 166                 item = path_list_insert(name, &branch_list);
 167
 168                 if (!item->util)
 169                         item->util = xcalloc(sizeof(struct branch_info), 1);
 170                 info = item->util;
 171                 if (type == REMOTE) {
 172                         if (info->remote)
 173                                 warning("more than one branch.%s", key);
 174                         info->remote = xstrdup(value);
 175                 } else {
 176                         char *space = strchr(value, ' ');
 177                         value = skip_prefix(value, "refs/heads/");
 178                         while (space) {
 179                                 char *merge;
 180                                 merge = xstrndup(value, space - value);
 181                                 path_list_append(merge, &info->merge);
 182                                 value = skip_prefix(space + 1, "refs/heads/");
 183                                 space = strchr(value, ' ');
 184                         }
 185                         path_list_append(xstrdup(value), &info->merge);
 186                 }
 187         }
 188         return 0;
 189 }
 190
 191 static void read_branches(void)
 192 {
 193         if (branch_list.nr)
 194                 return;
 195         git_config(config_read_branches);
 196         sort_path_list(&branch_list);
 197 }
 198
 199 struct ref_states {
 200         struct remote *remote;
 201         struct strbuf remote_prefix;
 202         struct path_list new, stale, tracked;
 203 };
 204
 205 static int handle_one_branch(const char *refname,
 206         const unsigned char *sha1, int flags, void *cb_data)
 207 {
 208         struct ref_states *states = cb_data;
 209         struct refspec refspec;
 210
 211         memset(&refspec, 0, sizeof(refspec));
 212         refspec.dst = (char *)refname;
 213         if (!remote_find_tracking(states->remote, &refspec)) {
 214                 struct path_list_item *item;
 215                 const char *name = skip_prefix(refspec.src, "refs/heads/");
 216                 /* symbolic refs pointing nowhere were handled already */
 217                 if ((flags & REF_ISSYMREF) ||
 218                                 unsorted_path_list_has_path(&states->tracked,
 219                                         name) ||
 220                                 unsorted_path_list_has_path(&states->new,
 221                                         name))
 222                         return 0;
 223                 item = path_list_append(name, &states->stale);
 224                 item->util = xstrdup(refname);
 225         }
 226         return 0;
 227 }
 228
 229 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 230 {
 231         struct ref *fetch_map = NULL, **tail = &fetch_map;
 232         int i;
 233
 234         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 235                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 236                         die("Could not get fetch map for refspec %s",
 237                                 states->remote->fetch_refspec[i]);
 238
 239         states->new.strdup_paths = states->tracked.strdup_paths = 1;
 240         for (ref = fetch_map; ref; ref = ref->next) {
 241                 struct path_list *target = &states->tracked;
 242                 unsigned char sha1[20];
 243                 void *util = NULL;
 244
 245                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 246                         target = &states->new;
 247                 else {
 248                         target = &states->tracked;
 249                         if (hashcmp(sha1, ref->new_sha1))
 250                                 util = &states;
 251                 }
 252                 path_list_append(skip_prefix(ref->name, "refs/heads/"),
 253                                 target)->util = util;
 254         }
 255         free_refs(fetch_map);
 256
 257         strbuf_addf(&states->remote_prefix,
 258                 "refs/remotes/%s/", states->remote->name);
 259         for_each_ref(handle_one_branch, states);
 260         sort_path_list(&states->stale);
 261
 262         return 0;
 263 }
 264
 265 struct branches_for_remote {
 266         const char *prefix;
 267         struct path_list *branches;
 268 };
 269
 270 static int add_branch_for_removal(const char *refname,
 271         const unsigned char *sha1, int flags, void *cb_data)
 272 {
 273         struct branches_for_remote *branches = cb_data;
 274
 275         if (!prefixcmp(refname, branches->prefix)) {
 276                 struct path_list_item *item;
 277
 278                 /* make sure that symrefs are deleted */
 279                 if (flags & REF_ISSYMREF)
 280                         return unlink(git_path(refname));
 281
 282                 item = path_list_append(refname, branches->branches);
 283                 item->util = xmalloc(20);
 284                 hashcpy(item->util, sha1);
 285         }
 286
 287         return 0;
 288 }
 289
 290 static int remove_branches(struct path_list *branches)
 291 {
 292         int i, result = 0;
 293         for (i = 0; i < branches->nr; i++) {
 294                 struct path_list_item *item = branches->items + i;
 295                 const char *refname = item->path;
 296                 unsigned char *sha1 = item->util;
 297
 298                 if (delete_ref(refname, sha1))
 299                         result |= error("Could not remove branch %s", refname);
 300         }
 301         return result;
 302 }
 303
 304 static int rm(int argc, const char **argv)
 305 {
 306         struct option options[] = {
 307                 OPT_END()
 308         };
 309         struct remote *remote;
 310         struct strbuf buf;
 311         struct path_list branches = { NULL, 0, 0, 1 };
 312         struct branches_for_remote cb_data = { NULL, &branches };
 313         int i;
 314
 315         if (argc != 2)
 316                 usage_with_options(builtin_remote_usage, options);
 317
 318         remote = remote_get(argv[1]);
 319         if (!remote)
 320                 die("No such remote: %s", argv[1]);
 321
 322         strbuf_init(&buf, 0);
 323         strbuf_addf(&buf, "remote.%s", remote->name);
 324         if (git_config_rename_section(buf.buf, NULL) < 1)
 325                 return error("Could not remove config section '%s'", buf.buf);
 326
 327         read_branches();
 328         for (i = 0; i < branch_list.nr; i++) {
 329                 struct path_list_item *item = branch_list.items + i;
 330                 struct branch_info *info = item->util;
 331                 if (info->remote && !strcmp(info->remote, remote->name)) {
 332                         const char *keys[] = { "remote", "merge", NULL }, **k;
 333                         for (k = keys; *k; k++) {
 334                                 strbuf_reset(&buf);
 335                                 strbuf_addf(&buf, "branch.%s.%s",
 336                                                 item->path, *k);
 337                                 if (git_config_set(buf.buf, NULL)) {
 338                                         strbuf_release(&buf);
 339                                         return -1;
 340                                 }
 341                         }
 342                 }
 343         }
 344
 345         /*
 346          * We cannot just pass a function to for_each_ref() which deletes
 347          * the branches one by one, since for_each_ref() relies on cached
 348          * refs, which are invalidated when deleting a branch.
 349          */
 350         strbuf_reset(&buf);
 351         strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
 352         cb_data.prefix = buf.buf;
 353         i = for_each_ref(add_branch_for_removal, &cb_data);
 354         strbuf_release(&buf);
 355
 356         if (!i)
 357                 i = remove_branches(&branches);
 358         path_list_clear(&branches, 1);
 359
 360         return i;
 361 }
 362
 363 static void show_list(const char *title, struct path_list *list)
 364 {
 365         int i;
 366
 367         if (!list->nr)
 368                 return;
 369
 370         printf(title, list->nr > 1 ? "es" : "");
 371         printf("\n    ");
 372         for (i = 0; i < list->nr; i++)
 373                 printf("%s%s", i ? " " : "", list->items[i].path);
 374         printf("\n");
 375 }
 376
 377 static int show_or_prune(int argc, const char **argv, int prune)
 378 {
 379         int dry_run = 0, result = 0;
 380         struct option options[] = {
 381                 OPT_GROUP("show specific options"),
 382                 OPT__DRY_RUN(&dry_run),
 383                 OPT_END()
 384         };
 385         struct ref_states states;
 386
 387         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 388
 389         if (argc < 1) {
 390                 if (!prune)
 391                         return show_all();
 392                 usage_with_options(builtin_remote_usage, options);
 393         }
 394
 395         memset(&states, 0, sizeof(states));
 396         for (; argc; argc--, argv++) {
 397                 struct transport *transport;
 398                 const struct ref *ref;
 399                 struct strbuf buf;
 400                 int i, got_states;
 401
 402                 states.remote = remote_get(*argv);
 403                 if (!states.remote)
 404                         return error("No such remote: %s", *argv);
 405                 transport = transport_get(NULL, states.remote->url_nr > 0 ?
 406                         states.remote->url[0] : NULL);
 407                 ref = transport_get_remote_refs(transport);
 408                 transport_disconnect(transport);
 409
 410                 read_branches();
 411                 got_states = get_ref_states(ref, &states);
 412                 if (got_states)
 413                         result = error("Error getting local info for '%s'",
 414                                         states.remote->name);
 415
 416                 if (prune) {
 417                         struct strbuf buf;
 418                         int prefix_len;
 419
 420                         strbuf_init(&buf, 0);
 421                         if (states.remote->fetch_refspec_nr == 1 &&
 422                                         states.remote->fetch->pattern &&
 423                                         !strcmp(states.remote->fetch->src,
 424                                                 states.remote->fetch->dst))
 425                                 /* handle --mirror remote */
 426                                 strbuf_addstr(&buf, "refs/heads/");
 427                         else
 428                                 strbuf_addf(&buf, "refs/remotes/%s/", *argv);
 429                         prefix_len = buf.len;
 430
 431                         for (i = 0; i < states.stale.nr; i++) {
 432                                 strbuf_setlen(&buf, prefix_len);
 433                                 strbuf_addstr(&buf, states.stale.items[i].path);
 434                                 result |= delete_ref(buf.buf, NULL);
 435                         }
 436
 437                         strbuf_release(&buf);
 438                         goto cleanup_states;
 439                 }
 440
 441                 printf("* remote %s\n  URL: %s\n", *argv,
 442                         states.remote->url_nr > 0 ?
 443                                 states.remote->url[0] : "(no URL)");
 444
 445                 for (i = 0; i < branch_list.nr; i++) {
 446                         struct path_list_item *branch = branch_list.items + i;
 447                         struct branch_info *info = branch->util;
 448                         int j;
 449
 450                         if (!info->merge.nr || strcmp(*argv, info->remote))
 451                                 continue;
 452                         printf("  Remote branch%s merged with 'git pull' "
 453                                 "while on branch %s\n   ",
 454                                 info->merge.nr > 1 ? "es" : "",
 455                                 branch->path);
 456                         for (j = 0; j < info->merge.nr; j++)
 457                                 printf(" %s", info->merge.items[j].path);
 458                         printf("\n");
 459                 }
 460
 461                 if (got_states)
 462                         continue;
 463                 strbuf_init(&buf, 0);
 464                 strbuf_addf(&buf, "  New remote branch%%s (next fetch will "
 465                         "store in remotes/%s)", states.remote->name);
 466                 show_list(buf.buf, &states.new);
 467                 strbuf_release(&buf);
 468                 show_list("  Stale tracking branch%s (use 'git remote prune')",
 469                                 &states.stale);
 470                 show_list("  Tracked remote branch%s",
 471                                 &states.tracked);
 472
 473                 if (states.remote->push_refspec_nr) {
 474                         printf("  Local branch%s pushed with 'git push'\n   ",
 475                                 states.remote->push_refspec_nr > 1 ?
 476                                         "es" : "");
 477                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 478                                 struct refspec *spec = states.remote->push + i;
 479                                 printf(" %s%s%s%s", spec->force ? "+" : "",
 480                                         skip_prefix(spec->src, "refs/heads/"),
 481                                         spec->dst ? ":" : "",
 482                                         skip_prefix(spec->dst, "refs/heads/"));
 483                         }
 484                         printf("\n");
 485                 }
 486 cleanup_states:
 487                 /* NEEDSWORK: free remote */
 488                 path_list_clear(&states.new, 0);
 489                 path_list_clear(&states.stale, 0);
 490                 path_list_clear(&states.tracked, 0);
 491         }
 492
 493         return result;
 494 }
 495
 496 static int get_one_remote_for_update(struct remote *remote, void *priv)
 497 {
 498         struct path_list *list = priv;
 499         if (!remote->skip_default_update)
 500                 path_list_append(xstrdup(remote->name), list);
 501         return 0;
 502 }
 503
 504 struct remote_group {
 505         const char *name;
 506         struct path_list *list;
 507 } remote_group;
 508
 509 static int get_remote_group(const char *key, const char *value)
 510 {
 511         if (!prefixcmp(key, "remotes.") &&
 512                         !strcmp(key + 8, remote_group.name)) {
 513                 /* split list by white space */
 514                 int space = strcspn(value, " \t\n");
 515                 while (*value) {
 516                         if (space > 1)
 517                                 path_list_append(xstrndup(value, space),
 518                                                 remote_group.list);
 519                         value += space + (value[space] != '\0');
 520                         space = strcspn(value, " \t\n");
 521                 }
 522         }
 523
 524         return 0;
 525 }
 526
 527 static int update(int argc, const char **argv)
 528 {
 529         int i, result = 0;
 530         struct path_list list = { NULL, 0, 0, 0 };
 531         static const char *default_argv[] = { NULL, "default", NULL };
 532
 533         if (argc < 2) {
 534                 argc = 2;
 535                 argv = default_argv;
 536         }
 537
 538         remote_group.list = &list;
 539         for (i = 1; i < argc; i++) {
 540                 remote_group.name = argv[i];
 541                 result = git_config(get_remote_group);
 542         }
 543
 544         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 545                 result = for_each_remote(get_one_remote_for_update, &list);
 546
 547         for (i = 0; i < list.nr; i++)
 548                 result |= fetch_remote(list.items[i].path);
 549
 550         /* all names were strdup()ed or strndup()ed */
 551         list.strdup_paths = 1;
 552         path_list_clear(&list, 0);
 553
 554         return result;
 555 }
 556
 557 static int get_one_entry(struct remote *remote, void *priv)
 558 {
 559         struct path_list *list = priv;
 560
 561         path_list_append(remote->name, list)->util = remote->url_nr ?
 562                 (void *)remote->url[0] : NULL;
 563         if (remote->url_nr > 1)
 564                 warning("Remote %s has more than one URL", remote->name);
 565
 566         return 0;
 567 }
 568
 569 static int show_all(void)
 570 {
 571         struct path_list list = { NULL, 0, 0 };
 572         int result = for_each_remote(get_one_entry, &list);
 573
 574         if (!result) {
 575                 int i;
 576
 577                 sort_path_list(&list);
 578                 for (i = 0; i < list.nr; i++) {
 579                         struct path_list_item *item = list.items + i;
 580                         printf("%s%s%s\n", item->path,
 581                                 verbose ? "\t" : "",
 582                                 verbose && item->util ?
 583                                         (const char *)item->util : "");
 584                 }
 585         }
 586         return result;
 587 }
 588
 589 int cmd_remote(int argc, const char **argv, const char *prefix)
 590 {
 591         struct option options[] = {
 592                 OPT__VERBOSE(&verbose),
 593                 OPT_END()
 594         };
 595         int result;
 596
 597         argc = parse_options(argc, argv, options, builtin_remote_usage,
 598                 PARSE_OPT_STOP_AT_NON_OPTION);
 599
 600         if (argc < 1)
 601                 result = show_all();
 602         else if (!strcmp(argv[0], "add"))
 603                 result = add(argc, argv);
 604         else if (!strcmp(argv[0], "rm"))
 605                 result = rm(argc, argv);
 606         else if (!strcmp(argv[0], "show"))
 607                 result = show_or_prune(argc, argv, 0);
 608         else if (!strcmp(argv[0], "prune"))
 609                 result = show_or_prune(argc, argv, 1);
 610         else if (!strcmp(argv[0], "update"))
 611                 result = update(argc, argv);
 612         else {
 613                 error("Unknown subcommand: %s", argv[0]);
 614                 usage_with_options(builtin_remote_usage, options);
 615         }
 616
 617         return result ? 1 : 0;
 618 }