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