builtin-remote.c

   1 #include "cache.h"
   2 #include "parse-options.h"
   3 #include "transport.h"
   4 #include "remote.h"
   5 #include "string-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 int opt_parse_track(const struct option *opt, const char *arg, int not)
  33 {
  34         struct string_list *list = opt->value;
  35         if (not)
  36                 string_list_clear(list, 0);
  37         else
  38                 string_list_append(arg, list);
  39         return 0;
  40 }
  41
  42 static int fetch_remote(const char *name)
  43 {
  44         const char *argv[] = { "fetch", name, NULL };
  45         printf("Updating %s\n", name);
  46         if (run_command_v_opt(argv, RUN_GIT_CMD))
  47                 return error("Could not fetch %s", name);
  48         return 0;
  49 }
  50
  51 static int add(int argc, const char **argv)
  52 {
  53         int fetch = 0, mirror = 0;
  54         struct string_list track = { NULL, 0, 0 };
  55         const char *master = NULL;
  56         struct remote *remote;
  57         struct strbuf buf, buf2;
  58         const char *name, *url;
  59         int i;
  60
  61         struct option options[] = {
  62                 OPT_GROUP("add specific options"),
  63                 OPT_BOOLEAN('f', "fetch", &fetch, "fetch the remote branches"),
  64                 OPT_CALLBACK('t', "track", &track, "branch",
  65                         "branch(es) to track", opt_parse_track),
  66                 OPT_STRING('m', "master", &master, "branch", "master branch"),
  67                 OPT_BOOLEAN(0, "mirror", &mirror, "no separate remotes"),
  68                 OPT_END()
  69         };
  70
  71         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
  72
  73         if (argc < 2)
  74                 usage_with_options(builtin_remote_usage, options);
  75
  76         name = argv[0];
  77         url = argv[1];
  78
  79         remote = remote_get(name);
  80         if (remote && (remote->url_nr > 1 || strcmp(name, remote->url[0]) ||
  81                         remote->fetch_refspec_nr))
  82                 die("remote %s already exists.", name);
  83
  84         strbuf_init(&buf, 0);
  85         strbuf_init(&buf2, 0);
  86
  87         strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
  88         if (!valid_fetch_refspec(buf2.buf))
  89                 die("'%s' is not a valid remote name", name);
  90
  91         strbuf_addf(&buf, "remote.%s.url", name);
  92         if (git_config_set(buf.buf, url))
  93                 return 1;
  94
  95         strbuf_reset(&buf);
  96         strbuf_addf(&buf, "remote.%s.fetch", name);
  97
  98         if (track.nr == 0)
  99                 string_list_append("*", &track);
 100         for (i = 0; i < track.nr; i++) {
 101                 struct string_list_item *item = track.items + i;
 102
 103                 strbuf_reset(&buf2);
 104                 strbuf_addch(&buf2, '+');
 105                 if (mirror)
 106                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 107                                         item->string, item->string);
 108                 else
 109                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 110                                         item->string, name, item->string);
 111                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 112                         return 1;
 113         }
 114
 115         if (mirror) {
 116                 strbuf_reset(&buf);
 117                 strbuf_addf(&buf, "remote.%s.mirror", name);
 118                 if (git_config_set(buf.buf, "yes"))
 119                         return 1;
 120         }
 121
 122         if (fetch && fetch_remote(name))
 123                 return 1;
 124
 125         if (master) {
 126                 strbuf_reset(&buf);
 127                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 128
 129                 strbuf_reset(&buf2);
 130                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 131
 132                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 133                         return error("Could not setup master '%s'", master);
 134         }
 135
 136         strbuf_release(&buf);
 137         strbuf_release(&buf2);
 138         string_list_clear(&track, 0);
 139
 140         return 0;
 141 }
 142
 143 struct branch_info {
 144         char *remote;
 145         struct string_list merge;
 146 };
 147
 148 static struct string_list branch_list;
 149
 150 static const char *abbrev_ref(const char *name, const char *prefix)
 151 {
 152         const char *abbrev = skip_prefix(name, prefix);
 153         if (abbrev)
 154                 return abbrev;
 155         return name;
 156 }
 157 #define abbrev_branch(name) abbrev_ref((name), "refs/heads/")
 158
 159 static int config_read_branches(const char *key, const char *value, void *cb)
 160 {
 161         if (!prefixcmp(key, "branch.")) {
 162                 char *name;
 163                 struct string_list_item *item;
 164                 struct branch_info *info;
 165                 enum { REMOTE, MERGE } type;
 166
 167                 key += 7;
 168                 if (!postfixcmp(key, ".remote")) {
 169                         name = xstrndup(key, strlen(key) - 7);
 170                         type = REMOTE;
 171                 } else if (!postfixcmp(key, ".merge")) {
 172                         name = xstrndup(key, strlen(key) - 6);
 173                         type = MERGE;
 174                 } else
 175                         return 0;
 176
 177                 item = string_list_insert(name, &branch_list);
 178
 179                 if (!item->util)
 180                         item->util = xcalloc(sizeof(struct branch_info), 1);
 181                 info = item->util;
 182                 if (type == REMOTE) {
 183                         if (info->remote)
 184                                 warning("more than one branch.%s", key);
 185                         info->remote = xstrdup(value);
 186                 } else {
 187                         char *space = strchr(value, ' ');
 188                         value = abbrev_branch(value);
 189                         while (space) {
 190                                 char *merge;
 191                                 merge = xstrndup(value, space - value);
 192                                 string_list_append(merge, &info->merge);
 193                                 value = abbrev_branch(space + 1);
 194                                 space = strchr(value, ' ');
 195                         }
 196                         string_list_append(xstrdup(value), &info->merge);
 197                 }
 198         }
 199         return 0;
 200 }
 201
 202 static void read_branches(void)
 203 {
 204         if (branch_list.nr)
 205                 return;
 206         git_config(config_read_branches, NULL);
 207         sort_string_list(&branch_list);
 208 }
 209
 210 struct ref_states {
 211         struct remote *remote;
 212         struct string_list new, stale, tracked;
 213 };
 214
 215 static int handle_one_branch(const char *refname,
 216         const unsigned char *sha1, int flags, void *cb_data)
 217 {
 218         struct ref_states *states = cb_data;
 219         struct refspec refspec;
 220
 221         memset(&refspec, 0, sizeof(refspec));
 222         refspec.dst = (char *)refname;
 223         if (!remote_find_tracking(states->remote, &refspec)) {
 224                 struct string_list_item *item;
 225                 const char *name = abbrev_branch(refspec.src);
 226                 /* symbolic refs pointing nowhere were handled already */
 227                 if ((flags & REF_ISSYMREF) ||
 228                                 unsorted_string_list_has_string(&states->tracked,
 229                                         name) ||
 230                                 unsorted_string_list_has_string(&states->new,
 231                                         name))
 232                         return 0;
 233                 item = string_list_append(name, &states->stale);
 234                 item->util = xstrdup(refname);
 235         }
 236         return 0;
 237 }
 238
 239 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 240 {
 241         struct ref *fetch_map = NULL, **tail = &fetch_map;
 242         int i;
 243
 244         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 245                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 246                         die("Could not get fetch map for refspec %s",
 247                                 states->remote->fetch_refspec[i]);
 248
 249         states->new.strdup_strings = states->tracked.strdup_strings = 1;
 250         for (ref = fetch_map; ref; ref = ref->next) {
 251                 struct string_list *target = &states->tracked;
 252                 unsigned char sha1[20];
 253                 void *util = NULL;
 254
 255                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 256                         target = &states->new;
 257                 else {
 258                         target = &states->tracked;
 259                         if (hashcmp(sha1, ref->new_sha1))
 260                                 util = &states;
 261                 }
 262                 string_list_append(abbrev_branch(ref->name), target)->util = util;
 263         }
 264         free_refs(fetch_map);
 265
 266         for_each_ref(handle_one_branch, states);
 267         sort_string_list(&states->stale);
 268
 269         return 0;
 270 }
 271
 272 struct known_remote {
 273         struct known_remote *next;
 274         struct remote *remote;
 275 };
 276
 277 struct known_remotes {
 278         struct remote *to_delete;
 279         struct known_remote *list;
 280 };
 281
 282 static int add_known_remote(struct remote *remote, void *cb_data)
 283 {
 284         struct known_remotes *all = cb_data;
 285         struct known_remote *r;
 286
 287         if (!strcmp(all->to_delete->name, remote->name))
 288                 return 0;
 289
 290         r = xmalloc(sizeof(*r));
 291         r->remote = remote;
 292         r->next = all->list;
 293         all->list = r;
 294         return 0;
 295 }
 296
 297 struct branches_for_remote {
 298         struct remote *remote;
 299         struct string_list *branches;
 300         struct known_remotes *keep;
 301 };
 302
 303 static int add_branch_for_removal(const char *refname,
 304         const unsigned char *sha1, int flags, void *cb_data)
 305 {
 306         struct branches_for_remote *branches = cb_data;
 307         struct refspec refspec;
 308         struct string_list_item *item;
 309         struct known_remote *kr;
 310
 311         memset(&refspec, 0, sizeof(refspec));
 312         refspec.dst = (char *)refname;
 313         if (remote_find_tracking(branches->remote, &refspec))
 314                 return 0;
 315
 316         /* don't delete a branch if another remote also uses it */
 317         for (kr = branches->keep->list; kr; kr = kr->next) {
 318                 memset(&refspec, 0, sizeof(refspec));
 319                 refspec.dst = (char *)refname;
 320                 if (!remote_find_tracking(kr->remote, &refspec))
 321                         return 0;
 322         }
 323
 324         /* make sure that symrefs are deleted */
 325         if (flags & REF_ISSYMREF)
 326                 return unlink(git_path(refname));
 327
 328         item = string_list_append(refname, branches->branches);
 329         item->util = xmalloc(20);
 330         hashcpy(item->util, sha1);
 331
 332         return 0;
 333 }
 334
 335 static int remove_branches(struct string_list *branches)
 336 {
 337         int i, result = 0;
 338         for (i = 0; i < branches->nr; i++) {
 339                 struct string_list_item *item = branches->items + i;
 340                 const char *refname = item->string;
 341                 unsigned char *sha1 = item->util;
 342
 343                 if (delete_ref(refname, sha1))
 344                         result |= error("Could not remove branch %s", refname);
 345         }
 346         return result;
 347 }
 348
 349 static int rm(int argc, const char **argv)
 350 {
 351         struct option options[] = {
 352                 OPT_END()
 353         };
 354         struct remote *remote;
 355         struct strbuf buf;
 356         struct known_remotes known_remotes = { NULL, NULL };
 357         struct string_list branches = { NULL, 0, 0, 1 };
 358         struct branches_for_remote cb_data = { NULL, &branches, &known_remotes };
 359         int i;
 360
 361         if (argc != 2)
 362                 usage_with_options(builtin_remote_usage, options);
 363
 364         remote = remote_get(argv[1]);
 365         if (!remote)
 366                 die("No such remote: %s", argv[1]);
 367
 368         known_remotes.to_delete = remote;
 369         for_each_remote(add_known_remote, &known_remotes);
 370
 371         strbuf_init(&buf, 0);
 372         strbuf_addf(&buf, "remote.%s", remote->name);
 373         if (git_config_rename_section(buf.buf, NULL) < 1)
 374                 return error("Could not remove config section '%s'", buf.buf);
 375
 376         read_branches();
 377         for (i = 0; i < branch_list.nr; i++) {
 378                 struct string_list_item *item = branch_list.items + i;
 379                 struct branch_info *info = item->util;
 380                 if (info->remote && !strcmp(info->remote, remote->name)) {
 381                         const char *keys[] = { "remote", "merge", NULL }, **k;
 382                         for (k = keys; *k; k++) {
 383                                 strbuf_reset(&buf);
 384                                 strbuf_addf(&buf, "branch.%s.%s",
 385                                                 item->string, *k);
 386                                 if (git_config_set(buf.buf, NULL)) {
 387                                         strbuf_release(&buf);
 388                                         return -1;
 389                                 }
 390                         }
 391                 }
 392         }
 393
 394         /*
 395          * We cannot just pass a function to for_each_ref() which deletes
 396          * the branches one by one, since for_each_ref() relies on cached
 397          * refs, which are invalidated when deleting a branch.
 398          */
 399         cb_data.remote = remote;
 400         i = for_each_ref(add_branch_for_removal, &cb_data);
 401         strbuf_release(&buf);
 402
 403         if (!i)
 404                 i = remove_branches(&branches);
 405         string_list_clear(&branches, 1);
 406
 407         return i;
 408 }
 409
 410 static void show_list(const char *title, struct string_list *list)
 411 {
 412         int i;
 413
 414         if (!list->nr)
 415                 return;
 416
 417         printf(title, list->nr > 1 ? "es" : "");
 418         printf("\n    ");
 419         for (i = 0; i < list->nr; i++)
 420                 printf("%s%s", i ? " " : "", list->items[i].string);
 421         printf("\n");
 422 }
 423
 424 static int get_remote_ref_states(const char *name,
 425                                  struct ref_states *states,
 426                                  int query)
 427 {
 428         struct transport *transport;
 429         const struct ref *ref;
 430
 431         states->remote = remote_get(name);
 432         if (!states->remote)
 433                 return error("No such remote: %s", name);
 434
 435         read_branches();
 436
 437         if (query) {
 438                 transport = transport_get(NULL, states->remote->url_nr > 0 ?
 439                         states->remote->url[0] : NULL);
 440                 ref = transport_get_remote_refs(transport);
 441                 transport_disconnect(transport);
 442
 443                 get_ref_states(ref, states);
 444         }
 445
 446         return 0;
 447 }
 448
 449 static int append_ref_to_tracked_list(const char *refname,
 450         const unsigned char *sha1, int flags, void *cb_data)
 451 {
 452         struct ref_states *states = cb_data;
 453         struct refspec refspec;
 454
 455         memset(&refspec, 0, sizeof(refspec));
 456         refspec.dst = (char *)refname;
 457         if (!remote_find_tracking(states->remote, &refspec))
 458                 string_list_append(abbrev_branch(refspec.src), &states->tracked);
 459
 460         return 0;
 461 }
 462
 463 static int show(int argc, const char **argv)
 464 {
 465         int no_query = 0, result = 0;
 466         struct option options[] = {
 467                 OPT_GROUP("show specific options"),
 468                 OPT_BOOLEAN('n', NULL, &no_query, "do not query remotes"),
 469                 OPT_END()
 470         };
 471         struct ref_states states;
 472
 473         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 474
 475         if (argc < 1)
 476                 return show_all();
 477
 478         memset(&states, 0, sizeof(states));
 479         for (; argc; argc--, argv++) {
 480                 struct strbuf buf;
 481                 int i;
 482
 483                 get_remote_ref_states(*argv, &states, !no_query);
 484
 485                 printf("* remote %s\n  URL: %s\n", *argv,
 486                         states.remote->url_nr > 0 ?
 487                                 states.remote->url[0] : "(no URL)");
 488
 489                 for (i = 0; i < branch_list.nr; i++) {
 490                         struct string_list_item *branch = branch_list.items + i;
 491                         struct branch_info *info = branch->util;
 492                         int j;
 493
 494                         if (!info->merge.nr || strcmp(*argv, info->remote))
 495                                 continue;
 496                         printf("  Remote branch%s merged with 'git pull' "
 497                                 "while on branch %s\n   ",
 498                                 info->merge.nr > 1 ? "es" : "",
 499                                 branch->string);
 500                         for (j = 0; j < info->merge.nr; j++)
 501                                 printf(" %s", info->merge.items[j].string);
 502                         printf("\n");
 503                 }
 504
 505                 if (!no_query) {
 506                         strbuf_init(&buf, 0);
 507                         strbuf_addf(&buf, "  New remote branch%%s (next fetch "
 508                                 "will store in remotes/%s)", states.remote->name);
 509                         show_list(buf.buf, &states.new);
 510                         strbuf_release(&buf);
 511                         show_list("  Stale tracking branch%s (use 'git remote "
 512                                 "prune')", &states.stale);
 513                 }
 514
 515                 if (no_query)
 516                         for_each_ref(append_ref_to_tracked_list, &states);
 517                 show_list("  Tracked remote branch%s", &states.tracked);
 518
 519                 if (states.remote->push_refspec_nr) {
 520                         printf("  Local branch%s pushed with 'git push'\n   ",
 521                                 states.remote->push_refspec_nr > 1 ?
 522                                         "es" : "");
 523                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 524                                 struct refspec *spec = states.remote->push + i;
 525                                 printf(" %s%s%s%s", spec->force ? "+" : "",
 526                                        abbrev_branch(spec->src),
 527                                        spec->dst ? ":" : "",
 528                                        spec->dst ? abbrev_branch(spec->dst) : "");
 529                         }
 530                         printf("\n");
 531                 }
 532
 533                 /* NEEDSWORK: free remote */
 534                 string_list_clear(&states.new, 0);
 535                 string_list_clear(&states.stale, 0);
 536                 string_list_clear(&states.tracked, 0);
 537         }
 538
 539         return result;
 540 }
 541
 542 static int prune(int argc, const char **argv)
 543 {
 544         int dry_run = 0, result = 0;
 545         struct option options[] = {
 546                 OPT_GROUP("prune specific options"),
 547                 OPT__DRY_RUN(&dry_run),
 548                 OPT_END()
 549         };
 550         struct ref_states states;
 551
 552         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 553
 554         if (argc < 1)
 555                 usage_with_options(builtin_remote_usage, options);
 556
 557         memset(&states, 0, sizeof(states));
 558         for (; argc; argc--, argv++) {
 559                 int i;
 560
 561                 get_remote_ref_states(*argv, &states, 1);
 562
 563                 if (states.stale.nr) {
 564                         printf("Pruning %s\n", *argv);
 565                         printf("URL: %s\n",
 566                                states.remote->url_nr
 567                                ? states.remote->url[0]
 568                                : "(no URL)");
 569                 }
 570
 571                 for (i = 0; i < states.stale.nr; i++) {
 572                         const char *refname = states.stale.items[i].util;
 573
 574                         if (!dry_run)
 575                                 result |= delete_ref(refname, NULL);
 576
 577                         printf(" * [%s] %s\n", dry_run ? "would prune" : "pruned",
 578                                abbrev_ref(refname, "refs/remotes/"));
 579                 }
 580
 581                 /* NEEDSWORK: free remote */
 582                 string_list_clear(&states.new, 0);
 583                 string_list_clear(&states.stale, 0);
 584                 string_list_clear(&states.tracked, 0);
 585         }
 586
 587         return result;
 588 }
 589
 590 static int get_one_remote_for_update(struct remote *remote, void *priv)
 591 {
 592         struct string_list *list = priv;
 593         if (!remote->skip_default_update)
 594                 string_list_append(xstrdup(remote->name), list);
 595         return 0;
 596 }
 597
 598 struct remote_group {
 599         const char *name;
 600         struct string_list *list;
 601 } remote_group;
 602
 603 static int get_remote_group(const char *key, const char *value, void *cb)
 604 {
 605         if (!prefixcmp(key, "remotes.") &&
 606                         !strcmp(key + 8, remote_group.name)) {
 607                 /* split list by white space */
 608                 int space = strcspn(value, " \t\n");
 609                 while (*value) {
 610                         if (space > 1)
 611                                 string_list_append(xstrndup(value, space),
 612                                                 remote_group.list);
 613                         value += space + (value[space] != '\0');
 614                         space = strcspn(value, " \t\n");
 615                 }
 616         }
 617
 618         return 0;
 619 }
 620
 621 static int update(int argc, const char **argv)
 622 {
 623         int i, result = 0;
 624         struct string_list list = { NULL, 0, 0, 0 };
 625         static const char *default_argv[] = { NULL, "default", NULL };
 626
 627         if (argc < 2) {
 628                 argc = 2;
 629                 argv = default_argv;
 630         }
 631
 632         remote_group.list = &list;
 633         for (i = 1; i < argc; i++) {
 634                 remote_group.name = argv[i];
 635                 result = git_config(get_remote_group, NULL);
 636         }
 637
 638         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 639                 result = for_each_remote(get_one_remote_for_update, &list);
 640
 641         for (i = 0; i < list.nr; i++)
 642                 result |= fetch_remote(list.items[i].string);
 643
 644         /* all names were strdup()ed or strndup()ed */
 645         list.strdup_strings = 1;
 646         string_list_clear(&list, 0);
 647
 648         return result;
 649 }
 650
 651 static int get_one_entry(struct remote *remote, void *priv)
 652 {
 653         struct string_list *list = priv;
 654
 655         string_list_append(remote->name, list)->util = remote->url_nr ?
 656                 (void *)remote->url[0] : NULL;
 657         if (remote->url_nr > 1)
 658                 warning("Remote %s has more than one URL", remote->name);
 659
 660         return 0;
 661 }
 662
 663 static int show_all(void)
 664 {
 665         struct string_list list = { NULL, 0, 0 };
 666         int result = for_each_remote(get_one_entry, &list);
 667
 668         if (!result) {
 669                 int i;
 670
 671                 sort_string_list(&list);
 672                 for (i = 0; i < list.nr; i++) {
 673                         struct string_list_item *item = list.items + i;
 674                         printf("%s%s%s\n", item->string,
 675                                 verbose ? "\t" : "",
 676                                 verbose && item->util ?
 677                                         (const char *)item->util : "");
 678                 }
 679         }
 680         return result;
 681 }
 682
 683 int cmd_remote(int argc, const char **argv, const char *prefix)
 684 {
 685         struct option options[] = {
 686                 OPT__VERBOSE(&verbose),
 687                 OPT_END()
 688         };
 689         int result;
 690
 691         argc = parse_options(argc, argv, options, builtin_remote_usage,
 692                 PARSE_OPT_STOP_AT_NON_OPTION);
 693
 694         if (argc < 1)
 695                 result = show_all();
 696         else if (!strcmp(argv[0], "add"))
 697                 result = add(argc, argv);
 698         else if (!strcmp(argv[0], "rm"))
 699                 result = rm(argc, argv);
 700         else if (!strcmp(argv[0], "show"))
 701                 result = show(argc, argv);
 702         else if (!strcmp(argv[0], "prune"))
 703                 result = prune(argc, argv);
 704         else if (!strcmp(argv[0], "update"))
 705                 result = update(argc, argv);
 706         else {
 707                 error("Unknown subcommand: %s", argv[0]);
 708                 usage_with_options(builtin_remote_usage, options);
 709         }
 710
 711         return result ? 1 : 0;
 712 }