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 (mirror) {
 122                 strbuf_reset(&buf);
 123                 strbuf_addf(&buf, "remote.%s.mirror", name);
 124                 if (git_config_set(buf.buf, "yes"))
 125                         return 1;
 126         }
 127
 128         if (fetch && fetch_remote(name))
 129                 return 1;
 130
 131         if (master) {
 132                 strbuf_reset(&buf);
 133                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 134
 135                 strbuf_reset(&buf2);
 136                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 137
 138                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 139                         return error("Could not setup master '%s'", master);
 140         }
 141
 142         strbuf_release(&buf);
 143         strbuf_release(&buf2);
 144         path_list_clear(&track, 0);
 145
 146         return 0;
 147 }
 148
 149 struct branch_info {
 150         char *remote;
 151         struct path_list merge;
 152 };
 153
 154 static struct path_list branch_list;
 155
 156 static int config_read_branches(const char *key, const char *value, void *cb)
 157 {
 158         if (!prefixcmp(key, "branch.")) {
 159                 char *name;
 160                 struct path_list_item *item;
 161                 struct branch_info *info;
 162                 enum { REMOTE, MERGE } type;
 163
 164                 key += 7;
 165                 if (!postfixcmp(key, ".remote")) {
 166                         name = xstrndup(key, strlen(key) - 7);
 167                         type = REMOTE;
 168                 } else if (!postfixcmp(key, ".merge")) {
 169                         name = xstrndup(key, strlen(key) - 6);
 170                         type = MERGE;
 171                 } else
 172                         return 0;
 173
 174                 item = path_list_insert(name, &branch_list);
 175
 176                 if (!item->util)
 177                         item->util = xcalloc(sizeof(struct branch_info), 1);
 178                 info = item->util;
 179                 if (type == REMOTE) {
 180                         if (info->remote)
 181                                 warning("more than one branch.%s", key);
 182                         info->remote = xstrdup(value);
 183                 } else {
 184                         char *space = strchr(value, ' ');
 185                         value = skip_prefix(value, "refs/heads/");
 186                         while (space) {
 187                                 char *merge;
 188                                 merge = xstrndup(value, space - value);
 189                                 path_list_append(merge, &info->merge);
 190                                 value = skip_prefix(space + 1, "refs/heads/");
 191                                 space = strchr(value, ' ');
 192                         }
 193                         path_list_append(xstrdup(value), &info->merge);
 194                 }
 195         }
 196         return 0;
 197 }
 198
 199 static void read_branches(void)
 200 {
 201         if (branch_list.nr)
 202                 return;
 203         git_config(config_read_branches, NULL);
 204         sort_path_list(&branch_list);
 205 }
 206
 207 struct ref_states {
 208         struct remote *remote;
 209         struct strbuf remote_prefix;
 210         struct path_list new, stale, tracked;
 211 };
 212
 213 static int handle_one_branch(const char *refname,
 214         const unsigned char *sha1, int flags, void *cb_data)
 215 {
 216         struct ref_states *states = cb_data;
 217         struct refspec refspec;
 218
 219         memset(&refspec, 0, sizeof(refspec));
 220         refspec.dst = (char *)refname;
 221         if (!remote_find_tracking(states->remote, &refspec)) {
 222                 struct path_list_item *item;
 223                 const char *name = skip_prefix(refspec.src, "refs/heads/");
 224                 /* symbolic refs pointing nowhere were handled already */
 225                 if ((flags & REF_ISSYMREF) ||
 226                                 unsorted_path_list_has_path(&states->tracked,
 227                                         name) ||
 228                                 unsorted_path_list_has_path(&states->new,
 229                                         name))
 230                         return 0;
 231                 item = path_list_append(name, &states->stale);
 232                 item->util = xstrdup(refname);
 233         }
 234         return 0;
 235 }
 236
 237 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 238 {
 239         struct ref *fetch_map = NULL, **tail = &fetch_map;
 240         int i;
 241
 242         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 243                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 244                         die("Could not get fetch map for refspec %s",
 245                                 states->remote->fetch_refspec[i]);
 246
 247         states->new.strdup_paths = states->tracked.strdup_paths = 1;
 248         for (ref = fetch_map; ref; ref = ref->next) {
 249                 struct path_list *target = &states->tracked;
 250                 unsigned char sha1[20];
 251                 void *util = NULL;
 252
 253                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 254                         target = &states->new;
 255                 else {
 256                         target = &states->tracked;
 257                         if (hashcmp(sha1, ref->new_sha1))
 258                                 util = &states;
 259                 }
 260                 path_list_append(skip_prefix(ref->name, "refs/heads/"),
 261                                 target)->util = util;
 262         }
 263         free_refs(fetch_map);
 264
 265         strbuf_addf(&states->remote_prefix,
 266                 "refs/remotes/%s/", states->remote->name);
 267         for_each_ref(handle_one_branch, states);
 268         sort_path_list(&states->stale);
 269
 270         return 0;
 271 }
 272
 273 struct branches_for_remote {
 274         const char *prefix;
 275         struct path_list *branches;
 276 };
 277
 278 static int add_branch_for_removal(const char *refname,
 279         const unsigned char *sha1, int flags, void *cb_data)
 280 {
 281         struct branches_for_remote *branches = cb_data;
 282
 283         if (!prefixcmp(refname, branches->prefix)) {
 284                 struct path_list_item *item;
 285
 286                 /* make sure that symrefs are deleted */
 287                 if (flags & REF_ISSYMREF)
 288                         return unlink(git_path(refname));
 289
 290                 item = path_list_append(refname, branches->branches);
 291                 item->util = xmalloc(20);
 292                 hashcpy(item->util, sha1);
 293         }
 294
 295         return 0;
 296 }
 297
 298 static int remove_branches(struct path_list *branches)
 299 {
 300         int i, result = 0;
 301         for (i = 0; i < branches->nr; i++) {
 302                 struct path_list_item *item = branches->items + i;
 303                 const char *refname = item->path;
 304                 unsigned char *sha1 = item->util;
 305
 306                 if (delete_ref(refname, sha1))
 307                         result |= error("Could not remove branch %s", refname);
 308         }
 309         return result;
 310 }
 311
 312 static int rm(int argc, const char **argv)
 313 {
 314         struct option options[] = {
 315                 OPT_END()
 316         };
 317         struct remote *remote;
 318         struct strbuf buf;
 319         struct path_list branches = { NULL, 0, 0, 1 };
 320         struct branches_for_remote cb_data = { NULL, &branches };
 321         int i;
 322
 323         if (argc != 2)
 324                 usage_with_options(builtin_remote_usage, options);
 325
 326         remote = remote_get(argv[1]);
 327         if (!remote)
 328                 die("No such remote: %s", argv[1]);
 329
 330         strbuf_init(&buf, 0);
 331         strbuf_addf(&buf, "remote.%s", remote->name);
 332         if (git_config_rename_section(buf.buf, NULL) < 1)
 333                 return error("Could not remove config section '%s'", buf.buf);
 334
 335         read_branches();
 336         for (i = 0; i < branch_list.nr; i++) {
 337                 struct path_list_item *item = branch_list.items + i;
 338                 struct branch_info *info = item->util;
 339                 if (info->remote && !strcmp(info->remote, remote->name)) {
 340                         const char *keys[] = { "remote", "merge", NULL }, **k;
 341                         for (k = keys; *k; k++) {
 342                                 strbuf_reset(&buf);
 343                                 strbuf_addf(&buf, "branch.%s.%s",
 344                                                 item->path, *k);
 345                                 if (git_config_set(buf.buf, NULL)) {
 346                                         strbuf_release(&buf);
 347                                         return -1;
 348                                 }
 349                         }
 350                 }
 351         }
 352
 353         /*
 354          * We cannot just pass a function to for_each_ref() which deletes
 355          * the branches one by one, since for_each_ref() relies on cached
 356          * refs, which are invalidated when deleting a branch.
 357          */
 358         strbuf_reset(&buf);
 359         strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
 360         cb_data.prefix = buf.buf;
 361         i = for_each_ref(add_branch_for_removal, &cb_data);
 362         strbuf_release(&buf);
 363
 364         if (!i)
 365                 i = remove_branches(&branches);
 366         path_list_clear(&branches, 1);
 367
 368         return i;
 369 }
 370
 371 static void show_list(const char *title, struct path_list *list)
 372 {
 373         int i;
 374
 375         if (!list->nr)
 376                 return;
 377
 378         printf(title, list->nr > 1 ? "es" : "");
 379         printf("\n    ");
 380         for (i = 0; i < list->nr; i++)
 381                 printf("%s%s", i ? " " : "", list->items[i].path);
 382         printf("\n");
 383 }
 384
 385 static int show_or_prune(int argc, const char **argv, int prune)
 386 {
 387         int dry_run = 0, result = 0;
 388         struct option options[] = {
 389                 OPT_GROUP("show specific options"),
 390                 OPT__DRY_RUN(&dry_run),
 391                 OPT_END()
 392         };
 393         struct ref_states states;
 394
 395         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 396
 397         if (argc < 1) {
 398                 if (!prune)
 399                         return show_all();
 400                 usage_with_options(builtin_remote_usage, options);
 401         }
 402
 403         memset(&states, 0, sizeof(states));
 404         for (; argc; argc--, argv++) {
 405                 struct transport *transport;
 406                 const struct ref *ref;
 407                 struct strbuf buf;
 408                 int i, got_states;
 409
 410                 states.remote = remote_get(*argv);
 411                 if (!states.remote)
 412                         return error("No such remote: %s", *argv);
 413                 transport = transport_get(NULL, states.remote->url_nr > 0 ?
 414                         states.remote->url[0] : NULL);
 415                 ref = transport_get_remote_refs(transport);
 416                 transport_disconnect(transport);
 417
 418                 read_branches();
 419                 got_states = get_ref_states(ref, &states);
 420                 if (got_states)
 421                         result = error("Error getting local info for '%s'",
 422                                         states.remote->name);
 423
 424                 if (prune) {
 425                         struct strbuf buf;
 426                         int prefix_len;
 427
 428                         strbuf_init(&buf, 0);
 429                         if (states.remote->fetch_refspec_nr == 1 &&
 430                                         states.remote->fetch->pattern &&
 431                                         !strcmp(states.remote->fetch->src,
 432                                                 states.remote->fetch->dst))
 433                                 /* handle --mirror remote */
 434                                 strbuf_addstr(&buf, "refs/heads/");
 435                         else
 436                                 strbuf_addf(&buf, "refs/remotes/%s/", *argv);
 437                         prefix_len = buf.len;
 438
 439                         for (i = 0; i < states.stale.nr; i++) {
 440                                 strbuf_setlen(&buf, prefix_len);
 441                                 strbuf_addstr(&buf, states.stale.items[i].path);
 442                                 result |= delete_ref(buf.buf, NULL);
 443                         }
 444
 445                         strbuf_release(&buf);
 446                         goto cleanup_states;
 447                 }
 448
 449                 printf("* remote %s\n  URL: %s\n", *argv,
 450                         states.remote->url_nr > 0 ?
 451                                 states.remote->url[0] : "(no URL)");
 452
 453                 for (i = 0; i < branch_list.nr; i++) {
 454                         struct path_list_item *branch = branch_list.items + i;
 455                         struct branch_info *info = branch->util;
 456                         int j;
 457
 458                         if (!info->merge.nr || strcmp(*argv, info->remote))
 459                                 continue;
 460                         printf("  Remote branch%s merged with 'git pull' "
 461                                 "while on branch %s\n   ",
 462                                 info->merge.nr > 1 ? "es" : "",
 463                                 branch->path);
 464                         for (j = 0; j < info->merge.nr; j++)
 465                                 printf(" %s", info->merge.items[j].path);
 466                         printf("\n");
 467                 }
 468
 469                 if (got_states)
 470                         continue;
 471                 strbuf_init(&buf, 0);
 472                 strbuf_addf(&buf, "  New remote branch%%s (next fetch will "
 473                         "store in remotes/%s)", states.remote->name);
 474                 show_list(buf.buf, &states.new);
 475                 strbuf_release(&buf);
 476                 show_list("  Stale tracking branch%s (use 'git remote prune')",
 477                                 &states.stale);
 478                 show_list("  Tracked remote branch%s",
 479                                 &states.tracked);
 480
 481                 if (states.remote->push_refspec_nr) {
 482                         printf("  Local branch%s pushed with 'git push'\n   ",
 483                                 states.remote->push_refspec_nr > 1 ?
 484                                         "es" : "");
 485                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 486                                 struct refspec *spec = states.remote->push + i;
 487                                 printf(" %s%s%s%s", spec->force ? "+" : "",
 488                                         skip_prefix(spec->src, "refs/heads/"),
 489                                         spec->dst ? ":" : "",
 490                                         skip_prefix(spec->dst, "refs/heads/"));
 491                         }
 492                         printf("\n");
 493                 }
 494 cleanup_states:
 495                 /* NEEDSWORK: free remote */
 496                 path_list_clear(&states.new, 0);
 497                 path_list_clear(&states.stale, 0);
 498                 path_list_clear(&states.tracked, 0);
 499         }
 500
 501         return result;
 502 }
 503
 504 static int get_one_remote_for_update(struct remote *remote, void *priv)
 505 {
 506         struct path_list *list = priv;
 507         if (!remote->skip_default_update)
 508                 path_list_append(xstrdup(remote->name), list);
 509         return 0;
 510 }
 511
 512 struct remote_group {
 513         const char *name;
 514         struct path_list *list;
 515 } remote_group;
 516
 517 static int get_remote_group(const char *key, const char *value, void *cb)
 518 {
 519         if (!prefixcmp(key, "remotes.") &&
 520                         !strcmp(key + 8, remote_group.name)) {
 521                 /* split list by white space */
 522                 int space = strcspn(value, " \t\n");
 523                 while (*value) {
 524                         if (space > 1)
 525                                 path_list_append(xstrndup(value, space),
 526                                                 remote_group.list);
 527                         value += space + (value[space] != '\0');
 528                         space = strcspn(value, " \t\n");
 529                 }
 530         }
 531
 532         return 0;
 533 }
 534
 535 static int update(int argc, const char **argv)
 536 {
 537         int i, result = 0;
 538         struct path_list list = { NULL, 0, 0, 0 };
 539         static const char *default_argv[] = { NULL, "default", NULL };
 540
 541         if (argc < 2) {
 542                 argc = 2;
 543                 argv = default_argv;
 544         }
 545
 546         remote_group.list = &list;
 547         for (i = 1; i < argc; i++) {
 548                 remote_group.name = argv[i];
 549                 result = git_config(get_remote_group, NULL);
 550         }
 551
 552         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 553                 result = for_each_remote(get_one_remote_for_update, &list);
 554
 555         for (i = 0; i < list.nr; i++)
 556                 result |= fetch_remote(list.items[i].path);
 557
 558         /* all names were strdup()ed or strndup()ed */
 559         list.strdup_paths = 1;
 560         path_list_clear(&list, 0);
 561
 562         return result;
 563 }
 564
 565 static int get_one_entry(struct remote *remote, void *priv)
 566 {
 567         struct path_list *list = priv;
 568
 569         path_list_append(remote->name, list)->util = remote->url_nr ?
 570                 (void *)remote->url[0] : NULL;
 571         if (remote->url_nr > 1)
 572                 warning("Remote %s has more than one URL", remote->name);
 573
 574         return 0;
 575 }
 576
 577 static int show_all(void)
 578 {
 579         struct path_list list = { NULL, 0, 0 };
 580         int result = for_each_remote(get_one_entry, &list);
 581
 582         if (!result) {
 583                 int i;
 584
 585                 sort_path_list(&list);
 586                 for (i = 0; i < list.nr; i++) {
 587                         struct path_list_item *item = list.items + i;
 588                         printf("%s%s%s\n", item->path,
 589                                 verbose ? "\t" : "",
 590                                 verbose && item->util ?
 591                                         (const char *)item->util : "");
 592                 }
 593         }
 594         return result;
 595 }
 596
 597 int cmd_remote(int argc, const char **argv, const char *prefix)
 598 {
 599         struct option options[] = {
 600                 OPT__VERBOSE(&verbose),
 601                 OPT_END()
 602         };
 603         int result;
 604
 605         argc = parse_options(argc, argv, options, builtin_remote_usage,
 606                 PARSE_OPT_STOP_AT_NON_OPTION);
 607
 608         if (argc < 1)
 609                 result = show_all();
 610         else if (!strcmp(argv[0], "add"))
 611                 result = add(argc, argv);
 612         else if (!strcmp(argv[0], "rm"))
 613                 result = rm(argc, argv);
 614         else if (!strcmp(argv[0], "show"))
 615                 result = show_or_prune(argc, argv, 0);
 616         else if (!strcmp(argv[0], "prune"))
 617                 result = show_or_prune(argc, argv, 1);
 618         else if (!strcmp(argv[0], "update"))
 619                 result = update(argc, argv);
 620         else {
 621                 error("Unknown subcommand: %s", argv[0]);
 622                 usage_with_options(builtin_remote_usage, options);
 623         }
 624
 625         return result ? 1 : 0;
 626 }