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(&buf, "remote.%s.url", name);
  94         if (git_config_set(buf.buf, url))
  95                 return 1;
  96
  97         if (track.nr == 0)
  98                 path_list_append("*", &track);
  99         for (i = 0; i < track.nr; i++) {
 100                 struct path_list_item *item = track.items + i;
 101
 102                 strbuf_reset(&buf);
 103                 strbuf_addf(&buf, "remote.%s.fetch", name);
 104
 105                 strbuf_reset(&buf2);
 106                 if (mirror)
 107                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 108                                         item->path, item->path);
 109                 else
 110                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 111                                         item->path, name, item->path);
 112                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 113                         return 1;
 114         }
 115
 116         if (fetch && fetch_remote(name))
 117                 return 1;
 118
 119         if (master) {
 120                 strbuf_reset(&buf);
 121                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 122
 123                 strbuf_reset(&buf2);
 124                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 125
 126                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 127                         return error("Could not setup master '%s'", master);
 128         }
 129
 130         strbuf_release(&buf);
 131         strbuf_release(&buf2);
 132         path_list_clear(&track, 0);
 133
 134         return 0;
 135 }
 136
 137 struct branch_info {
 138         char *remote;
 139         struct path_list merge;
 140 };
 141
 142 static struct path_list branch_list;
 143
 144 static int config_read_branches(const char *key, const char *value)
 145 {
 146         if (!prefixcmp(key, "branch.")) {
 147                 char *name;
 148                 struct path_list_item *item;
 149                 struct branch_info *info;
 150                 enum { REMOTE, MERGE } type;
 151
 152                 key += 7;
 153                 if (!postfixcmp(key, ".remote")) {
 154                         name = xstrndup(key, strlen(key) - 7);
 155                         type = REMOTE;
 156                 } else if (!postfixcmp(key, ".merge")) {
 157                         name = xstrndup(key, strlen(key) - 6);
 158                         type = MERGE;
 159                 } else
 160                         return 0;
 161
 162                 item = path_list_insert(name, &branch_list);
 163
 164                 if (!item->util)
 165                         item->util = xcalloc(sizeof(struct branch_info), 1);
 166                 info = item->util;
 167                 if (type == REMOTE) {
 168                         if (info->remote)
 169                                 warning("more than one branch.%s", key);
 170                         info->remote = xstrdup(value);
 171                 } else {
 172                         char *space = strchr(value, ' ');
 173                         value = skip_prefix(value, "refs/heads/");
 174                         while (space) {
 175                                 char *merge;
 176                                 merge = xstrndup(value, space - value);
 177                                 path_list_append(merge, &info->merge);
 178                                 value = skip_prefix(space + 1, "refs/heads/");
 179                                 space = strchr(value, ' ');
 180                         }
 181                         path_list_append(xstrdup(value), &info->merge);
 182                 }
 183         }
 184         return 0;
 185 }
 186
 187 static void read_branches(void)
 188 {
 189         if (branch_list.nr)
 190                 return;
 191         git_config(config_read_branches);
 192         sort_path_list(&branch_list);
 193 }
 194
 195 struct ref_states {
 196         struct remote *remote;
 197         struct strbuf remote_prefix;
 198         struct path_list new, stale, tracked;
 199 };
 200
 201 static int handle_one_branch(const char *refname,
 202         const unsigned char *sha1, int flags, void *cb_data)
 203 {
 204         struct ref_states *states = cb_data;
 205         struct refspec refspec;
 206
 207         memset(&refspec, 0, sizeof(refspec));
 208         refspec.dst = (char *)refname;
 209         if (!remote_find_tracking(states->remote, &refspec)) {
 210                 struct path_list_item *item;
 211                 const char *name = skip_prefix(refspec.src, "refs/heads/");
 212                 /* symbolic refs pointing nowhere were handled already */
 213                 if ((flags & REF_ISSYMREF) ||
 214                                 unsorted_path_list_has_path(&states->tracked,
 215                                         name) ||
 216                                 unsorted_path_list_has_path(&states->new,
 217                                         name))
 218                         return 0;
 219                 item = path_list_append(name, &states->stale);
 220                 item->util = xstrdup(refname);
 221         }
 222         return 0;
 223 }
 224
 225 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 226 {
 227         struct ref *fetch_map = NULL, **tail = &fetch_map;
 228         int i;
 229
 230         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 231                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 232                         die("Could not get fetch map for refspec %s",
 233                                 states->remote->fetch_refspec[i]);
 234
 235         states->new.strdup_paths = states->tracked.strdup_paths = 1;
 236         for (ref = fetch_map; ref; ref = ref->next) {
 237                 struct path_list *target = &states->tracked;
 238                 unsigned char sha1[20];
 239                 void *util = NULL;
 240
 241                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 242                         target = &states->new;
 243                 else {
 244                         target = &states->tracked;
 245                         if (hashcmp(sha1, ref->new_sha1))
 246                                 util = &states;
 247                 }
 248                 path_list_append(skip_prefix(ref->name, "refs/heads/"),
 249                                 target)->util = util;
 250         }
 251         free_refs(fetch_map);
 252
 253         strbuf_addf(&states->remote_prefix,
 254                 "refs/remotes/%s/", states->remote->name);
 255         for_each_ref(handle_one_branch, states);
 256         sort_path_list(&states->stale);
 257
 258         return 0;
 259 }
 260
 261 struct branches_for_remote {
 262         const char *prefix;
 263         struct path_list *branches;
 264 };
 265
 266 static int add_branch_for_removal(const char *refname,
 267         const unsigned char *sha1, int flags, void *cb_data)
 268 {
 269         struct branches_for_remote *branches = cb_data;
 270
 271         if (!prefixcmp(refname, branches->prefix)) {
 272                 struct path_list_item *item;
 273
 274                 /* make sure that symrefs are deleted */
 275                 if (flags & REF_ISSYMREF)
 276                         return unlink(git_path(refname));
 277
 278                 item = path_list_append(refname, branches->branches);
 279                 item->util = xmalloc(20);
 280                 hashcpy(item->util, sha1);
 281         }
 282
 283         return 0;
 284 }
 285
 286 static int remove_branches(struct path_list *branches)
 287 {
 288         int i, result = 0;
 289         for (i = 0; i < branches->nr; i++) {
 290                 struct path_list_item *item = branches->items + i;
 291                 const char *refname = item->path;
 292                 unsigned char *sha1 = item->util;
 293
 294                 if (delete_ref(refname, sha1))
 295                         result |= error("Could not remove branch %s", refname);
 296         }
 297         return result;
 298 }
 299
 300 static int rm(int argc, const char **argv)
 301 {
 302         struct option options[] = {
 303                 OPT_END()
 304         };
 305         struct remote *remote;
 306         struct strbuf buf;
 307         struct path_list branches = { NULL, 0, 0, 1 };
 308         struct branches_for_remote cb_data = { NULL, &branches };
 309         int i;
 310
 311         if (argc != 2)
 312                 usage_with_options(builtin_remote_usage, options);
 313
 314         remote = remote_get(argv[1]);
 315         if (!remote)
 316                 die("No such remote: %s", argv[1]);
 317
 318         strbuf_init(&buf, 0);
 319         strbuf_addf(&buf, "remote.%s", remote->name);
 320         if (git_config_rename_section(buf.buf, NULL) < 1)
 321                 return error("Could not remove config section '%s'", buf.buf);
 322
 323         read_branches();
 324         for (i = 0; i < branch_list.nr; i++) {
 325                 struct path_list_item *item = branch_list.items + i;
 326                 struct branch_info *info = item->util;
 327                 if (info->remote && !strcmp(info->remote, remote->name)) {
 328                         const char *keys[] = { "remote", "merge", NULL }, **k;
 329                         for (k = keys; *k; k++) {
 330                                 strbuf_reset(&buf);
 331                                 strbuf_addf(&buf, "branch.%s.%s",
 332                                                 item->path, *k);
 333                                 if (git_config_set(buf.buf, NULL)) {
 334                                         strbuf_release(&buf);
 335                                         return -1;
 336                                 }
 337                         }
 338                 }
 339         }
 340
 341         /*
 342          * We cannot just pass a function to for_each_ref() which deletes
 343          * the branches one by one, since for_each_ref() relies on cached
 344          * refs, which are invalidated when deleting a branch.
 345          */
 346         strbuf_reset(&buf);
 347         strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
 348         cb_data.prefix = buf.buf;
 349         i = for_each_ref(add_branch_for_removal, &cb_data);
 350         strbuf_release(&buf);
 351
 352         if (!i)
 353                 i = remove_branches(&branches);
 354         path_list_clear(&branches, 1);
 355
 356         return i;
 357 }
 358
 359 static void show_list(const char *title, struct path_list *list)
 360 {
 361         int i;
 362
 363         if (!list->nr)
 364                 return;
 365
 366         printf(title, list->nr > 1 ? "es" : "");
 367         printf("\n    ");
 368         for (i = 0; i < list->nr; i++)
 369                 printf("%s%s", i ? " " : "", list->items[i].path);
 370         printf("\n");
 371 }
 372
 373 static int show_or_prune(int argc, const char **argv, int prune)
 374 {
 375         int dry_run = 0, result = 0;
 376         struct option options[] = {
 377                 OPT_GROUP("show specific options"),
 378                 OPT__DRY_RUN(&dry_run),
 379                 OPT_END()
 380         };
 381         struct ref_states states;
 382
 383         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 384
 385         if (argc < 1) {
 386                 if (!prune)
 387                         return show_all();
 388                 usage_with_options(builtin_remote_usage, options);
 389         }
 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 }