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 (mirror) {
 121                 strbuf_reset(&buf);
 122                 strbuf_addf(&buf, "remote.%s.mirror", name);
 123                 if (git_config_set(buf.buf, "yes"))
 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         path_list_clear(&track, 0);
 144
 145         return 0;
 146 }
 147
 148 struct branch_info {
 149         char *remote;
 150         struct path_list merge;
 151 };
 152
 153 static struct path_list branch_list;
 154
 155 static int config_read_branches(const char *key, const char *value)
 156 {
 157         if (!prefixcmp(key, "branch.")) {
 158                 char *name;
 159                 struct path_list_item *item;
 160                 struct branch_info *info;
 161                 enum { REMOTE, MERGE } type;
 162
 163                 key += 7;
 164                 if (!postfixcmp(key, ".remote")) {
 165                         name = xstrndup(key, strlen(key) - 7);
 166                         type = REMOTE;
 167                 } else if (!postfixcmp(key, ".merge")) {
 168                         name = xstrndup(key, strlen(key) - 6);
 169                         type = MERGE;
 170                 } else
 171                         return 0;
 172
 173                 item = path_list_insert(name, &branch_list);
 174
 175                 if (!item->util)
 176                         item->util = xcalloc(sizeof(struct branch_info), 1);
 177                 info = item->util;
 178                 if (type == REMOTE) {
 179                         if (info->remote)
 180                                 warning("more than one branch.%s", key);
 181                         info->remote = xstrdup(value);
 182                 } else {
 183                         char *space = strchr(value, ' ');
 184                         value = skip_prefix(value, "refs/heads/");
 185                         while (space) {
 186                                 char *merge;
 187                                 merge = xstrndup(value, space - value);
 188                                 path_list_append(merge, &info->merge);
 189                                 value = skip_prefix(space + 1, "refs/heads/");
 190                                 space = strchr(value, ' ');
 191                         }
 192                         path_list_append(xstrdup(value), &info->merge);
 193                 }
 194         }
 195         return 0;
 196 }
 197
 198 static void read_branches(void)
 199 {
 200         if (branch_list.nr)
 201                 return;
 202         git_config(config_read_branches);
 203         sort_path_list(&branch_list);
 204 }
 205
 206 struct ref_states {
 207         struct remote *remote;
 208         struct strbuf remote_prefix;
 209         struct path_list new, stale, tracked;
 210 };
 211
 212 static int handle_one_branch(const char *refname,
 213         const unsigned char *sha1, int flags, void *cb_data)
 214 {
 215         struct ref_states *states = cb_data;
 216         struct refspec refspec;
 217
 218         memset(&refspec, 0, sizeof(refspec));
 219         refspec.dst = (char *)refname;
 220         if (!remote_find_tracking(states->remote, &refspec)) {
 221                 struct path_list_item *item;
 222                 const char *name = skip_prefix(refspec.src, "refs/heads/");
 223                 /* symbolic refs pointing nowhere were handled already */
 224                 if ((flags & REF_ISSYMREF) ||
 225                                 unsorted_path_list_has_path(&states->tracked,
 226                                         name) ||
 227                                 unsorted_path_list_has_path(&states->new,
 228                                         name))
 229                         return 0;
 230                 item = path_list_append(name, &states->stale);
 231                 item->util = xstrdup(refname);
 232         }
 233         return 0;
 234 }
 235
 236 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 237 {
 238         struct ref *fetch_map = NULL, **tail = &fetch_map;
 239         int i;
 240
 241         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 242                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 243                         die("Could not get fetch map for refspec %s",
 244                                 states->remote->fetch_refspec[i]);
 245
 246         states->new.strdup_paths = states->tracked.strdup_paths = 1;
 247         for (ref = fetch_map; ref; ref = ref->next) {
 248                 struct path_list *target = &states->tracked;
 249                 unsigned char sha1[20];
 250                 void *util = NULL;
 251
 252                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 253                         target = &states->new;
 254                 else {
 255                         target = &states->tracked;
 256                         if (hashcmp(sha1, ref->new_sha1))
 257                                 util = &states;
 258                 }
 259                 path_list_append(skip_prefix(ref->name, "refs/heads/"),
 260                                 target)->util = util;
 261         }
 262         free_refs(fetch_map);
 263
 264         strbuf_addf(&states->remote_prefix,
 265                 "refs/remotes/%s/", states->remote->name);
 266         for_each_ref(handle_one_branch, states);
 267         sort_path_list(&states->stale);
 268
 269         return 0;
 270 }
 271
 272 struct branches_for_remote {
 273         const char *prefix;
 274         struct path_list *branches;
 275 };
 276
 277 static int add_branch_for_removal(const char *refname,
 278         const unsigned char *sha1, int flags, void *cb_data)
 279 {
 280         struct branches_for_remote *branches = cb_data;
 281
 282         if (!prefixcmp(refname, branches->prefix)) {
 283                 struct path_list_item *item;
 284
 285                 /* make sure that symrefs are deleted */
 286                 if (flags & REF_ISSYMREF)
 287                         return unlink(git_path(refname));
 288
 289                 item = path_list_append(refname, branches->branches);
 290                 item->util = xmalloc(20);
 291                 hashcpy(item->util, sha1);
 292         }
 293
 294         return 0;
 295 }
 296
 297 static int remove_branches(struct path_list *branches)
 298 {
 299         int i, result = 0;
 300         for (i = 0; i < branches->nr; i++) {
 301                 struct path_list_item *item = branches->items + i;
 302                 const char *refname = item->path;
 303                 unsigned char *sha1 = item->util;
 304
 305                 if (delete_ref(refname, sha1))
 306                         result |= error("Could not remove branch %s", refname);
 307         }
 308         return result;
 309 }
 310
 311 static int rm(int argc, const char **argv)
 312 {
 313         struct option options[] = {
 314                 OPT_END()
 315         };
 316         struct remote *remote;
 317         struct strbuf buf;
 318         struct path_list branches = { NULL, 0, 0, 1 };
 319         struct branches_for_remote cb_data = { NULL, &branches };
 320         int i;
 321
 322         if (argc != 2)
 323                 usage_with_options(builtin_remote_usage, options);
 324
 325         remote = remote_get(argv[1]);
 326         if (!remote)
 327                 die("No such remote: %s", argv[1]);
 328
 329         strbuf_init(&buf, 0);
 330         strbuf_addf(&buf, "remote.%s", remote->name);
 331         if (git_config_rename_section(buf.buf, NULL) < 1)
 332                 return error("Could not remove config section '%s'", buf.buf);
 333
 334         read_branches();
 335         for (i = 0; i < branch_list.nr; i++) {
 336                 struct path_list_item *item = branch_list.items + i;
 337                 struct branch_info *info = item->util;
 338                 if (info->remote && !strcmp(info->remote, remote->name)) {
 339                         const char *keys[] = { "remote", "merge", NULL }, **k;
 340                         for (k = keys; *k; k++) {
 341                                 strbuf_reset(&buf);
 342                                 strbuf_addf(&buf, "branch.%s.%s",
 343                                                 item->path, *k);
 344                                 if (git_config_set(buf.buf, NULL)) {
 345                                         strbuf_release(&buf);
 346                                         return -1;
 347                                 }
 348                         }
 349                 }
 350         }
 351
 352         /*
 353          * We cannot just pass a function to for_each_ref() which deletes
 354          * the branches one by one, since for_each_ref() relies on cached
 355          * refs, which are invalidated when deleting a branch.
 356          */
 357         strbuf_reset(&buf);
 358         strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
 359         cb_data.prefix = buf.buf;
 360         i = for_each_ref(add_branch_for_removal, &cb_data);
 361         strbuf_release(&buf);
 362
 363         if (!i)
 364                 i = remove_branches(&branches);
 365         path_list_clear(&branches, 1);
 366
 367         return i;
 368 }
 369
 370 static void show_list(const char *title, struct path_list *list)
 371 {
 372         int i;
 373
 374         if (!list->nr)
 375                 return;
 376
 377         printf(title, list->nr > 1 ? "es" : "");
 378         printf("\n    ");
 379         for (i = 0; i < list->nr; i++)
 380                 printf("%s%s", i ? " " : "", list->items[i].path);
 381         printf("\n");
 382 }
 383
 384 static int show_or_prune(int argc, const char **argv, int prune)
 385 {
 386         int dry_run = 0, result = 0;
 387         struct option options[] = {
 388                 OPT_GROUP("show specific options"),
 389                 OPT__DRY_RUN(&dry_run),
 390                 OPT_END()
 391         };
 392         struct ref_states states;
 393
 394         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 395
 396         if (argc < 1) {
 397                 if (!prune)
 398                         return show_all();
 399                 usage_with_options(builtin_remote_usage, options);
 400         }
 401
 402         memset(&states, 0, sizeof(states));
 403         for (; argc; argc--, argv++) {
 404                 struct transport *transport;
 405                 const struct ref *ref;
 406                 struct strbuf buf;
 407                 int i, got_states;
 408
 409                 states.remote = remote_get(*argv);
 410                 if (!states.remote)
 411                         return error("No such remote: %s", *argv);
 412                 transport = transport_get(NULL, states.remote->url_nr > 0 ?
 413                         states.remote->url[0] : NULL);
 414                 ref = transport_get_remote_refs(transport);
 415                 transport_disconnect(transport);
 416
 417                 read_branches();
 418                 got_states = get_ref_states(ref, &states);
 419                 if (got_states)
 420                         result = error("Error getting local info for '%s'",
 421                                         states.remote->name);
 422
 423                 if (prune) {
 424                         struct strbuf buf;
 425                         int prefix_len;
 426
 427                         strbuf_init(&buf, 0);
 428                         if (states.remote->fetch_refspec_nr == 1 &&
 429                                         states.remote->fetch->pattern &&
 430                                         !strcmp(states.remote->fetch->src,
 431                                                 states.remote->fetch->dst))
 432                                 /* handle --mirror remote */
 433                                 strbuf_addstr(&buf, "refs/heads/");
 434                         else
 435                                 strbuf_addf(&buf, "refs/remotes/%s/", *argv);
 436                         prefix_len = buf.len;
 437
 438                         for (i = 0; i < states.stale.nr; i++) {
 439                                 strbuf_setlen(&buf, prefix_len);
 440                                 strbuf_addstr(&buf, states.stale.items[i].path);
 441                                 result |= delete_ref(buf.buf, NULL);
 442                         }
 443
 444                         strbuf_release(&buf);
 445                         goto cleanup_states;
 446                 }
 447
 448                 printf("* remote %s\n  URL: %s\n", *argv,
 449                         states.remote->url_nr > 0 ?
 450                                 states.remote->url[0] : "(no URL)");
 451
 452                 for (i = 0; i < branch_list.nr; i++) {
 453                         struct path_list_item *branch = branch_list.items + i;
 454                         struct branch_info *info = branch->util;
 455                         int j;
 456
 457                         if (!info->merge.nr || strcmp(*argv, info->remote))
 458                                 continue;
 459                         printf("  Remote branch%s merged with 'git pull' "
 460                                 "while on branch %s\n   ",
 461                                 info->merge.nr > 1 ? "es" : "",
 462                                 branch->path);
 463                         for (j = 0; j < info->merge.nr; j++)
 464                                 printf(" %s", info->merge.items[j].path);
 465                         printf("\n");
 466                 }
 467
 468                 if (got_states)
 469                         continue;
 470                 strbuf_init(&buf, 0);
 471                 strbuf_addf(&buf, "  New remote branch%%s (next fetch will "
 472                         "store in remotes/%s)", states.remote->name);
 473                 show_list(buf.buf, &states.new);
 474                 strbuf_release(&buf);
 475                 show_list("  Stale tracking branch%s (use 'git remote prune')",
 476                                 &states.stale);
 477                 show_list("  Tracked remote branch%s",
 478                                 &states.tracked);
 479
 480                 if (states.remote->push_refspec_nr) {
 481                         printf("  Local branch%s pushed with 'git push'\n   ",
 482                                 states.remote->push_refspec_nr > 1 ?
 483                                         "es" : "");
 484                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 485                                 struct refspec *spec = states.remote->push + i;
 486                                 printf(" %s%s%s%s", spec->force ? "+" : "",
 487                                         skip_prefix(spec->src, "refs/heads/"),
 488                                         spec->dst ? ":" : "",
 489                                         skip_prefix(spec->dst, "refs/heads/"));
 490                         }
 491                         printf("\n");
 492                 }
 493 cleanup_states:
 494                 /* NEEDSWORK: free remote */
 495                 path_list_clear(&states.new, 0);
 496                 path_list_clear(&states.stale, 0);
 497                 path_list_clear(&states.tracked, 0);
 498         }
 499
 500         return result;
 501 }
 502
 503 static int get_one_remote_for_update(struct remote *remote, void *priv)
 504 {
 505         struct path_list *list = priv;
 506         if (!remote->skip_default_update)
 507                 path_list_append(xstrdup(remote->name), list);
 508         return 0;
 509 }
 510
 511 struct remote_group {
 512         const char *name;
 513         struct path_list *list;
 514 } remote_group;
 515
 516 static int get_remote_group(const char *key, const char *value)
 517 {
 518         if (!prefixcmp(key, "remotes.") &&
 519                         !strcmp(key + 8, remote_group.name)) {
 520                 /* split list by white space */
 521                 int space = strcspn(value, " \t\n");
 522                 while (*value) {
 523                         if (space > 1)
 524                                 path_list_append(xstrndup(value, space),
 525                                                 remote_group.list);
 526                         value += space + (value[space] != '\0');
 527                         space = strcspn(value, " \t\n");
 528                 }
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int update(int argc, const char **argv)
 535 {
 536         int i, result = 0;
 537         struct path_list list = { NULL, 0, 0, 0 };
 538         static const char *default_argv[] = { NULL, "default", NULL };
 539
 540         if (argc < 2) {
 541                 argc = 2;
 542                 argv = default_argv;
 543         }
 544
 545         remote_group.list = &list;
 546         for (i = 1; i < argc; i++) {
 547                 remote_group.name = argv[i];
 548                 result = git_config(get_remote_group);
 549         }
 550
 551         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 552                 result = for_each_remote(get_one_remote_for_update, &list);
 553
 554         for (i = 0; i < list.nr; i++)
 555                 result |= fetch_remote(list.items[i].path);
 556
 557         /* all names were strdup()ed or strndup()ed */
 558         list.strdup_paths = 1;
 559         path_list_clear(&list, 0);
 560
 561         return result;
 562 }
 563
 564 static int get_one_entry(struct remote *remote, void *priv)
 565 {
 566         struct path_list *list = priv;
 567
 568         path_list_append(remote->name, list)->util = remote->url_nr ?
 569                 (void *)remote->url[0] : NULL;
 570         if (remote->url_nr > 1)
 571                 warning("Remote %s has more than one URL", remote->name);
 572
 573         return 0;
 574 }
 575
 576 static int show_all(void)
 577 {
 578         struct path_list list = { NULL, 0, 0 };
 579         int result = for_each_remote(get_one_entry, &list);
 580
 581         if (!result) {
 582                 int i;
 583
 584                 sort_path_list(&list);
 585                 for (i = 0; i < list.nr; i++) {
 586                         struct path_list_item *item = list.items + i;
 587                         printf("%s%s%s\n", item->path,
 588                                 verbose ? "\t" : "",
 589                                 verbose && item->util ?
 590                                         (const char *)item->util : "");
 591                 }
 592         }
 593         return result;
 594 }
 595
 596 int cmd_remote(int argc, const char **argv, const char *prefix)
 597 {
 598         struct option options[] = {
 599                 OPT__VERBOSE(&verbose),
 600                 OPT_END()
 601         };
 602         int result;
 603
 604         argc = parse_options(argc, argv, options, builtin_remote_usage,
 605                 PARSE_OPT_STOP_AT_NON_OPTION);
 606
 607         if (argc < 1)
 608                 result = show_all();
 609         else if (!strcmp(argv[0], "add"))
 610                 result = add(argc, argv);
 611         else if (!strcmp(argv[0], "rm"))
 612                 result = rm(argc, argv);
 613         else if (!strcmp(argv[0], "show"))
 614                 result = show_or_prune(argc, argv, 0);
 615         else if (!strcmp(argv[0], "prune"))
 616                 result = show_or_prune(argc, argv, 1);
 617         else if (!strcmp(argv[0], "update"))
 618                 result = update(argc, argv);
 619         else {
 620                 error("Unknown subcommand: %s", argv[0]);
 621                 usage_with_options(builtin_remote_usage, options);
 622         }
 623
 624         return result ? 1 : 0;
 625 }