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                 strbuf_addch(&buf2, '+');
 111                 if (mirror)
 112                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 113                                         item->path, item->path);
 114                 else
 115                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 116                                         item->path, name, item->path);
 117                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 118                         return 1;
 119         }
 120
 121         if (fetch && fetch_remote(name))
 122                 return 1;
 123
 124         if (master) {
 125                 strbuf_reset(&buf);
 126                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 127
 128                 strbuf_reset(&buf2);
 129                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 130
 131                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 132                         return error("Could not setup master '%s'", master);
 133         }
 134
 135         strbuf_release(&buf);
 136         strbuf_release(&buf2);
 137         path_list_clear(&track, 0);
 138
 139         return 0;
 140 }
 141
 142 struct branch_info {
 143         char *remote;
 144         struct path_list merge;
 145 };
 146
 147 static struct path_list branch_list;
 148
 149 static int config_read_branches(const char *key, const char *value)
 150 {
 151         if (!prefixcmp(key, "branch.")) {
 152                 char *name;
 153                 struct path_list_item *item;
 154                 struct branch_info *info;
 155                 enum { REMOTE, MERGE } type;
 156
 157                 key += 7;
 158                 if (!postfixcmp(key, ".remote")) {
 159                         name = xstrndup(key, strlen(key) - 7);
 160                         type = REMOTE;
 161                 } else if (!postfixcmp(key, ".merge")) {
 162                         name = xstrndup(key, strlen(key) - 6);
 163                         type = MERGE;
 164                 } else
 165                         return 0;
 166
 167                 item = path_list_insert(name, &branch_list);
 168
 169                 if (!item->util)
 170                         item->util = xcalloc(sizeof(struct branch_info), 1);
 171                 info = item->util;
 172                 if (type == REMOTE) {
 173                         if (info->remote)
 174                                 warning("more than one branch.%s", key);
 175                         info->remote = xstrdup(value);
 176                 } else {
 177                         char *space = strchr(value, ' ');
 178                         value = skip_prefix(value, "refs/heads/");
 179                         while (space) {
 180                                 char *merge;
 181                                 merge = xstrndup(value, space - value);
 182                                 path_list_append(merge, &info->merge);
 183                                 value = skip_prefix(space + 1, "refs/heads/");
 184                                 space = strchr(value, ' ');
 185                         }
 186                         path_list_append(xstrdup(value), &info->merge);
 187                 }
 188         }
 189         return 0;
 190 }
 191
 192 static void read_branches(void)
 193 {
 194         if (branch_list.nr)
 195                 return;
 196         git_config(config_read_branches);
 197         sort_path_list(&branch_list);
 198 }
 199
 200 struct ref_states {
 201         struct remote *remote;
 202         struct strbuf remote_prefix;
 203         struct path_list new, stale, tracked;
 204 };
 205
 206 static int handle_one_branch(const char *refname,
 207         const unsigned char *sha1, int flags, void *cb_data)
 208 {
 209         struct ref_states *states = cb_data;
 210         struct refspec refspec;
 211
 212         memset(&refspec, 0, sizeof(refspec));
 213         refspec.dst = (char *)refname;
 214         if (!remote_find_tracking(states->remote, &refspec)) {
 215                 struct path_list_item *item;
 216                 const char *name = skip_prefix(refspec.src, "refs/heads/");
 217                 /* symbolic refs pointing nowhere were handled already */
 218                 if ((flags & REF_ISSYMREF) ||
 219                                 unsorted_path_list_has_path(&states->tracked,
 220                                         name) ||
 221                                 unsorted_path_list_has_path(&states->new,
 222                                         name))
 223                         return 0;
 224                 item = path_list_append(name, &states->stale);
 225                 item->util = xstrdup(refname);
 226         }
 227         return 0;
 228 }
 229
 230 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 231 {
 232         struct ref *fetch_map = NULL, **tail = &fetch_map;
 233         int i;
 234
 235         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 236                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 237                         die("Could not get fetch map for refspec %s",
 238                                 states->remote->fetch_refspec[i]);
 239
 240         states->new.strdup_paths = states->tracked.strdup_paths = 1;
 241         for (ref = fetch_map; ref; ref = ref->next) {
 242                 struct path_list *target = &states->tracked;
 243                 unsigned char sha1[20];
 244                 void *util = NULL;
 245
 246                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 247                         target = &states->new;
 248                 else {
 249                         target = &states->tracked;
 250                         if (hashcmp(sha1, ref->new_sha1))
 251                                 util = &states;
 252                 }
 253                 path_list_append(skip_prefix(ref->name, "refs/heads/"),
 254                                 target)->util = util;
 255         }
 256         free_refs(fetch_map);
 257
 258         strbuf_addf(&states->remote_prefix,
 259                 "refs/remotes/%s/", states->remote->name);
 260         for_each_ref(handle_one_branch, states);
 261         sort_path_list(&states->stale);
 262
 263         return 0;
 264 }
 265
 266 struct branches_for_remote {
 267         const char *prefix;
 268         struct path_list *branches;
 269 };
 270
 271 static int add_branch_for_removal(const char *refname,
 272         const unsigned char *sha1, int flags, void *cb_data)
 273 {
 274         struct branches_for_remote *branches = cb_data;
 275
 276         if (!prefixcmp(refname, branches->prefix)) {
 277                 struct path_list_item *item;
 278
 279                 /* make sure that symrefs are deleted */
 280                 if (flags & REF_ISSYMREF)
 281                         return unlink(git_path(refname));
 282
 283                 item = path_list_append(refname, branches->branches);
 284                 item->util = xmalloc(20);
 285                 hashcpy(item->util, sha1);
 286         }
 287
 288         return 0;
 289 }
 290
 291 static int remove_branches(struct path_list *branches)
 292 {
 293         int i, result = 0;
 294         for (i = 0; i < branches->nr; i++) {
 295                 struct path_list_item *item = branches->items + i;
 296                 const char *refname = item->path;
 297                 unsigned char *sha1 = item->util;
 298
 299                 if (delete_ref(refname, sha1))
 300                         result |= error("Could not remove branch %s", refname);
 301         }
 302         return result;
 303 }
 304
 305 static int rm(int argc, const char **argv)
 306 {
 307         struct option options[] = {
 308                 OPT_END()
 309         };
 310         struct remote *remote;
 311         struct strbuf buf;
 312         struct path_list branches = { NULL, 0, 0, 1 };
 313         struct branches_for_remote cb_data = { NULL, &branches };
 314         int i;
 315
 316         if (argc != 2)
 317                 usage_with_options(builtin_remote_usage, options);
 318
 319         remote = remote_get(argv[1]);
 320         if (!remote)
 321                 die("No such remote: %s", argv[1]);
 322
 323         strbuf_init(&buf, 0);
 324         strbuf_addf(&buf, "remote.%s", remote->name);
 325         if (git_config_rename_section(buf.buf, NULL) < 1)
 326                 return error("Could not remove config section '%s'", buf.buf);
 327
 328         read_branches();
 329         for (i = 0; i < branch_list.nr; i++) {
 330                 struct path_list_item *item = branch_list.items + i;
 331                 struct branch_info *info = item->util;
 332                 if (info->remote && !strcmp(info->remote, remote->name)) {
 333                         const char *keys[] = { "remote", "merge", NULL }, **k;
 334                         for (k = keys; *k; k++) {
 335                                 strbuf_reset(&buf);
 336                                 strbuf_addf(&buf, "branch.%s.%s",
 337                                                 item->path, *k);
 338                                 if (git_config_set(buf.buf, NULL)) {
 339                                         strbuf_release(&buf);
 340                                         return -1;
 341                                 }
 342                         }
 343                 }
 344         }
 345
 346         /*
 347          * We cannot just pass a function to for_each_ref() which deletes
 348          * the branches one by one, since for_each_ref() relies on cached
 349          * refs, which are invalidated when deleting a branch.
 350          */
 351         strbuf_reset(&buf);
 352         strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
 353         cb_data.prefix = buf.buf;
 354         i = for_each_ref(add_branch_for_removal, &cb_data);
 355         strbuf_release(&buf);
 356
 357         if (!i)
 358                 i = remove_branches(&branches);
 359         path_list_clear(&branches, 1);
 360
 361         return i;
 362 }
 363
 364 static void show_list(const char *title, struct path_list *list)
 365 {
 366         int i;
 367
 368         if (!list->nr)
 369                 return;
 370
 371         printf(title, list->nr > 1 ? "es" : "");
 372         printf("\n    ");
 373         for (i = 0; i < list->nr; i++)
 374                 printf("%s%s", i ? " " : "", list->items[i].path);
 375         printf("\n");
 376 }
 377
 378 static int show_or_prune(int argc, const char **argv, int prune)
 379 {
 380         int dry_run = 0, result = 0;
 381         struct option options[] = {
 382                 OPT_GROUP("show specific options"),
 383                 OPT__DRY_RUN(&dry_run),
 384                 OPT_END()
 385         };
 386         struct ref_states states;
 387
 388         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 389
 390         if (argc < 1) {
 391                 if (!prune)
 392                         return show_all();
 393                 usage_with_options(builtin_remote_usage, options);
 394         }
 395
 396         memset(&states, 0, sizeof(states));
 397         for (; argc; argc--, argv++) {
 398                 struct transport *transport;
 399                 const struct ref *ref;
 400                 struct strbuf buf;
 401                 int i, got_states;
 402
 403                 states.remote = remote_get(*argv);
 404                 if (!states.remote)
 405                         return error("No such remote: %s", *argv);
 406                 transport = transport_get(NULL, states.remote->url_nr > 0 ?
 407                         states.remote->url[0] : NULL);
 408                 ref = transport_get_remote_refs(transport);
 409                 transport_disconnect(transport);
 410
 411                 read_branches();
 412                 got_states = get_ref_states(ref, &states);
 413                 if (got_states)
 414                         result = error("Error getting local info for '%s'",
 415                                         states.remote->name);
 416
 417                 if (prune) {
 418                         struct strbuf buf;
 419                         int prefix_len;
 420
 421                         strbuf_init(&buf, 0);
 422                         if (states.remote->fetch_refspec_nr == 1 &&
 423                                         states.remote->fetch->pattern &&
 424                                         !strcmp(states.remote->fetch->src,
 425                                                 states.remote->fetch->dst))
 426                                 /* handle --mirror remote */
 427                                 strbuf_addstr(&buf, "refs/heads/");
 428                         else
 429                                 strbuf_addf(&buf, "refs/remotes/%s/", *argv);
 430                         prefix_len = buf.len;
 431
 432                         for (i = 0; i < states.stale.nr; i++) {
 433                                 strbuf_setlen(&buf, prefix_len);
 434                                 strbuf_addstr(&buf, states.stale.items[i].path);
 435                                 result |= delete_ref(buf.buf, NULL);
 436                         }
 437
 438                         strbuf_release(&buf);
 439                         goto cleanup_states;
 440                 }
 441
 442                 printf("* remote %s\n  URL: %s\n", *argv,
 443                         states.remote->url_nr > 0 ?
 444                                 states.remote->url[0] : "(no URL)");
 445
 446                 for (i = 0; i < branch_list.nr; i++) {
 447                         struct path_list_item *branch = branch_list.items + i;
 448                         struct branch_info *info = branch->util;
 449                         int j;
 450
 451                         if (!info->merge.nr || strcmp(*argv, info->remote))
 452                                 continue;
 453                         printf("  Remote branch%s merged with 'git pull' "
 454                                 "while on branch %s\n   ",
 455                                 info->merge.nr > 1 ? "es" : "",
 456                                 branch->path);
 457                         for (j = 0; j < info->merge.nr; j++)
 458                                 printf(" %s", info->merge.items[j].path);
 459                         printf("\n");
 460                 }
 461
 462                 if (got_states)
 463                         continue;
 464                 strbuf_init(&buf, 0);
 465                 strbuf_addf(&buf, "  New remote branch%%s (next fetch will "
 466                         "store in remotes/%s)", states.remote->name);
 467                 show_list(buf.buf, &states.new);
 468                 strbuf_release(&buf);
 469                 show_list("  Stale tracking branch%s (use 'git remote prune')",
 470                                 &states.stale);
 471                 show_list("  Tracked remote branch%s",
 472                                 &states.tracked);
 473
 474                 if (states.remote->push_refspec_nr) {
 475                         printf("  Local branch%s pushed with 'git push'\n   ",
 476                                 states.remote->push_refspec_nr > 1 ?
 477                                         "es" : "");
 478                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 479                                 struct refspec *spec = states.remote->push + i;
 480                                 printf(" %s%s%s%s", spec->force ? "+" : "",
 481                                         skip_prefix(spec->src, "refs/heads/"),
 482                                         spec->dst ? ":" : "",
 483                                         skip_prefix(spec->dst, "refs/heads/"));
 484                         }
 485                         printf("\n");
 486                 }
 487 cleanup_states:
 488                 /* NEEDSWORK: free remote */
 489                 path_list_clear(&states.new, 0);
 490                 path_list_clear(&states.stale, 0);
 491                 path_list_clear(&states.tracked, 0);
 492         }
 493
 494         return result;
 495 }
 496
 497 static int get_one_remote_for_update(struct remote *remote, void *priv)
 498 {
 499         struct path_list *list = priv;
 500         if (!remote->skip_default_update)
 501                 path_list_append(xstrdup(remote->name), list);
 502         return 0;
 503 }
 504
 505 struct remote_group {
 506         const char *name;
 507         struct path_list *list;
 508 } remote_group;
 509
 510 static int get_remote_group(const char *key, const char *value)
 511 {
 512         if (!prefixcmp(key, "remotes.") &&
 513                         !strcmp(key + 8, remote_group.name)) {
 514                 /* split list by white space */
 515                 int space = strcspn(value, " \t\n");
 516                 while (*value) {
 517                         if (space > 1)
 518                                 path_list_append(xstrndup(value, space),
 519                                                 remote_group.list);
 520                         value += space + (value[space] != '\0');
 521                         space = strcspn(value, " \t\n");
 522                 }
 523         }
 524
 525         return 0;
 526 }
 527
 528 static int update(int argc, const char **argv)
 529 {
 530         int i, result = 0;
 531         struct path_list list = { NULL, 0, 0, 0 };
 532         static const char *default_argv[] = { NULL, "default", NULL };
 533
 534         if (argc < 2) {
 535                 argc = 2;
 536                 argv = default_argv;
 537         }
 538
 539         remote_group.list = &list;
 540         for (i = 1; i < argc; i++) {
 541                 remote_group.name = argv[i];
 542                 result = git_config(get_remote_group);
 543         }
 544
 545         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 546                 result = for_each_remote(get_one_remote_for_update, &list);
 547
 548         for (i = 0; i < list.nr; i++)
 549                 result |= fetch_remote(list.items[i].path);
 550
 551         /* all names were strdup()ed or strndup()ed */
 552         list.strdup_paths = 1;
 553         path_list_clear(&list, 0);
 554
 555         return result;
 556 }
 557
 558 static int get_one_entry(struct remote *remote, void *priv)
 559 {
 560         struct path_list *list = priv;
 561
 562         path_list_append(remote->name, list)->util = remote->url_nr ?
 563                 (void *)remote->url[0] : NULL;
 564         if (remote->url_nr > 1)
 565                 warning("Remote %s has more than one URL", remote->name);
 566
 567         return 0;
 568 }
 569
 570 static int show_all(void)
 571 {
 572         struct path_list list = { NULL, 0, 0 };
 573         int result = for_each_remote(get_one_entry, &list);
 574
 575         if (!result) {
 576                 int i;
 577
 578                 sort_path_list(&list);
 579                 for (i = 0; i < list.nr; i++) {
 580                         struct path_list_item *item = list.items + i;
 581                         printf("%s%s%s\n", item->path,
 582                                 verbose ? "\t" : "",
 583                                 verbose && item->util ?
 584                                         (const char *)item->util : "");
 585                 }
 586         }
 587         return result;
 588 }
 589
 590 int cmd_remote(int argc, const char **argv, const char *prefix)
 591 {
 592         struct option options[] = {
 593                 OPT__VERBOSE(&verbose),
 594                 OPT_END()
 595         };
 596         int result;
 597
 598         argc = parse_options(argc, argv, options, builtin_remote_usage,
 599                 PARSE_OPT_STOP_AT_NON_OPTION);
 600
 601         if (argc < 1)
 602                 result = show_all();
 603         else if (!strcmp(argv[0], "add"))
 604                 result = add(argc, argv);
 605         else if (!strcmp(argv[0], "rm"))
 606                 result = rm(argc, argv);
 607         else if (!strcmp(argv[0], "show"))
 608                 result = show_or_prune(argc, argv, 0);
 609         else if (!strcmp(argv[0], "prune"))
 610                 result = show_or_prune(argc, argv, 1);
 611         else if (!strcmp(argv[0], "update"))
 612                 result = update(argc, argv);
 613         else {
 614                 error("Unknown subcommand: %s", argv[0]);
 615                 usage_with_options(builtin_remote_usage, options);
 616         }
 617
 618         return result ? 1 : 0;
 619 }