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