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