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(&buf, "remote.%s.url", name);
  92         if (git_config_set(buf.buf, url))
  93                 return 1;
  94
  95         if (track.nr == 0)
  96                 path_list_append("*", &track);
  97         for (i = 0; i < track.nr; i++) {
  98                 struct path_list_item *item = track.items + i;
  99
 100                 strbuf_reset(&buf);
 101                 strbuf_addf(&buf, "remote.%s.fetch", name);
 102
 103                 strbuf_reset(&buf2);
 104                 if (mirror)
 105                         strbuf_addf(&buf2, "refs/%s:refs/%s",
 106                                         item->path, item->path);
 107                 else
 108                         strbuf_addf(&buf2, "refs/heads/%s:refs/remotes/%s/%s",
 109                                         item->path, name, item->path);
 110                 if (git_config_set_multivar(buf.buf, buf2.buf, "^$", 0))
 111                         return 1;
 112         }
 113
 114         if (fetch && fetch_remote(name))
 115                 return 1;
 116
 117         if (master) {
 118                 strbuf_reset(&buf);
 119                 strbuf_addf(&buf, "refs/remotes/%s/HEAD", name);
 120
 121                 strbuf_reset(&buf2);
 122                 strbuf_addf(&buf2, "refs/remotes/%s/%s", name, master);
 123
 124                 if (create_symref(buf.buf, buf2.buf, "remote add"))
 125                         return error("Could not setup master '%s'", master);
 126         }
 127
 128         strbuf_release(&buf);
 129         strbuf_release(&buf2);
 130         path_list_clear(&track, 0);
 131
 132         return 0;
 133 }
 134
 135 struct branch_info {
 136         char *remote;
 137         struct path_list merge;
 138 };
 139
 140 static struct path_list branch_list;
 141
 142 static int config_read_branches(const char *key, const char *value)
 143 {
 144         if (!prefixcmp(key, "branch.")) {
 145                 char *name;
 146                 struct path_list_item *item;
 147                 struct branch_info *info;
 148                 enum { REMOTE, MERGE } type;
 149
 150                 key += 7;
 151                 if (!postfixcmp(key, ".remote")) {
 152                         name = xstrndup(key, strlen(key) - 7);
 153                         type = REMOTE;
 154                 } else if (!postfixcmp(key, ".merge")) {
 155                         name = xstrndup(key, strlen(key) - 6);
 156                         type = MERGE;
 157                 } else
 158                         return 0;
 159
 160                 item = path_list_insert(name, &branch_list);
 161
 162                 if (!item->util)
 163                         item->util = xcalloc(sizeof(struct branch_info), 1);
 164                 info = item->util;
 165                 if (type == REMOTE) {
 166                         if (info->remote)
 167                                 warning("more than one branch.%s", key);
 168                         info->remote = xstrdup(value);
 169                 } else {
 170                         char *space = strchr(value, ' ');
 171                         value = skip_prefix(value, "refs/heads/");
 172                         while (space) {
 173                                 char *merge;
 174                                 merge = xstrndup(value, space - value);
 175                                 path_list_append(merge, &info->merge);
 176                                 value = skip_prefix(space + 1, "refs/heads/");
 177                                 space = strchr(value, ' ');
 178                         }
 179                         path_list_append(xstrdup(value), &info->merge);
 180                 }
 181         }
 182         return 0;
 183 }
 184
 185 static void read_branches(void)
 186 {
 187         if (branch_list.nr)
 188                 return;
 189         git_config(config_read_branches);
 190         sort_path_list(&branch_list);
 191 }
 192
 193 struct ref_states {
 194         struct remote *remote;
 195         struct strbuf remote_prefix;
 196         struct path_list new, stale, tracked;
 197 };
 198
 199 static int handle_one_branch(const char *refname,
 200         const unsigned char *sha1, int flags, void *cb_data)
 201 {
 202         struct ref_states *states = cb_data;
 203         struct refspec refspec;
 204
 205         memset(&refspec, 0, sizeof(refspec));
 206         refspec.dst = (char *)refname;
 207         if (!remote_find_tracking(states->remote, &refspec)) {
 208                 struct path_list_item *item;
 209                 const char *name = skip_prefix(refspec.src, "refs/heads/");
 210                 /* symbolic refs pointing nowhere were handled already */
 211                 if ((flags & REF_ISSYMREF) ||
 212                                 unsorted_path_list_has_path(&states->tracked,
 213                                         name) ||
 214                                 unsorted_path_list_has_path(&states->new,
 215                                         name))
 216                         return 0;
 217                 item = path_list_append(name, &states->stale);
 218                 item->util = xstrdup(refname);
 219         }
 220         return 0;
 221 }
 222
 223 static int get_ref_states(const struct ref *ref, struct ref_states *states)
 224 {
 225         struct ref *fetch_map = NULL, **tail = &fetch_map;
 226         int i;
 227
 228         for (i = 0; i < states->remote->fetch_refspec_nr; i++)
 229                 if (get_fetch_map(ref, states->remote->fetch + i, &tail, 1))
 230                         die("Could not get fetch map for refspec %s",
 231                                 states->remote->fetch_refspec[i]);
 232
 233         states->new.strdup_paths = states->tracked.strdup_paths = 1;
 234         for (ref = fetch_map; ref; ref = ref->next) {
 235                 struct path_list *target = &states->tracked;
 236                 unsigned char sha1[20];
 237                 void *util = NULL;
 238
 239                 if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
 240                         target = &states->new;
 241                 else {
 242                         target = &states->tracked;
 243                         if (hashcmp(sha1, ref->new_sha1))
 244                                 util = &states;
 245                 }
 246                 path_list_append(skip_prefix(ref->name, "refs/heads/"),
 247                                 target)->util = util;
 248         }
 249         free_refs(fetch_map);
 250
 251         strbuf_addf(&states->remote_prefix,
 252                 "refs/remotes/%s/", states->remote->name);
 253         for_each_ref(handle_one_branch, states);
 254         sort_path_list(&states->stale);
 255
 256         return 0;
 257 }
 258
 259 struct branches_for_remote {
 260         const char *prefix;
 261         struct path_list *branches;
 262 };
 263
 264 static int add_branch_for_removal(const char *refname,
 265         const unsigned char *sha1, int flags, void *cb_data)
 266 {
 267         struct branches_for_remote *branches = cb_data;
 268
 269         if (!prefixcmp(refname, branches->prefix)) {
 270                 struct path_list_item *item;
 271
 272                 /* make sure that symrefs are deleted */
 273                 if (flags & REF_ISSYMREF)
 274                         return unlink(git_path(refname));
 275
 276                 item = path_list_append(refname, branches->branches);
 277                 item->util = xmalloc(20);
 278                 hashcpy(item->util, sha1);
 279         }
 280
 281         return 0;
 282 }
 283
 284 static int remove_branches(struct path_list *branches)
 285 {
 286         int i, result = 0;
 287         for (i = 0; i < branches->nr; i++) {
 288                 struct path_list_item *item = branches->items + i;
 289                 const char *refname = item->path;
 290                 unsigned char *sha1 = item->util;
 291
 292                 if (delete_ref(refname, sha1))
 293                         result |= error("Could not remove branch %s", refname);
 294         }
 295         return result;
 296 }
 297
 298 static int rm(int argc, const char **argv)
 299 {
 300         struct option options[] = {
 301                 OPT_END()
 302         };
 303         struct remote *remote;
 304         struct strbuf buf;
 305         struct path_list branches = { NULL, 0, 0, 1 };
 306         struct branches_for_remote cb_data = { NULL, &branches };
 307         int i;
 308
 309         if (argc != 2)
 310                 usage_with_options(builtin_remote_usage, options);
 311
 312         remote = remote_get(argv[1]);
 313         if (!remote)
 314                 die("No such remote: %s", argv[1]);
 315
 316         strbuf_init(&buf, 0);
 317         strbuf_addf(&buf, "remote.%s", remote->name);
 318         if (git_config_rename_section(buf.buf, NULL) < 1)
 319                 return error("Could not remove config section '%s'", buf.buf);
 320
 321         read_branches();
 322         for (i = 0; i < branch_list.nr; i++) {
 323                 struct path_list_item *item = branch_list.items + i;
 324                 struct branch_info *info = item->util;
 325                 if (info->remote && !strcmp(info->remote, remote->name)) {
 326                         const char *keys[] = { "remote", "merge", NULL }, **k;
 327                         for (k = keys; *k; k++) {
 328                                 strbuf_reset(&buf);
 329                                 strbuf_addf(&buf, "branch.%s.%s",
 330                                                 item->path, *k);
 331                                 if (git_config_set(buf.buf, NULL)) {
 332                                         strbuf_release(&buf);
 333                                         return -1;
 334                                 }
 335                         }
 336                 }
 337         }
 338
 339         /*
 340          * We cannot just pass a function to for_each_ref() which deletes
 341          * the branches one by one, since for_each_ref() relies on cached
 342          * refs, which are invalidated when deleting a branch.
 343          */
 344         strbuf_reset(&buf);
 345         strbuf_addf(&buf, "refs/remotes/%s/", remote->name);
 346         cb_data.prefix = buf.buf;
 347         i = for_each_ref(add_branch_for_removal, &cb_data);
 348         strbuf_release(&buf);
 349
 350         if (!i)
 351                 i = remove_branches(&branches);
 352         path_list_clear(&branches, 1);
 353
 354         return i;
 355 }
 356
 357 static void show_list(const char *title, struct path_list *list)
 358 {
 359         int i;
 360
 361         if (!list->nr)
 362                 return;
 363
 364         printf(title, list->nr > 1 ? "es" : "");
 365         printf("\n    ");
 366         for (i = 0; i < list->nr; i++)
 367                 printf("%s%s", i ? " " : "", list->items[i].path);
 368         printf("\n");
 369 }
 370
 371 static int show_or_prune(int argc, const char **argv, int prune)
 372 {
 373         int dry_run = 0, result = 0;
 374         struct option options[] = {
 375                 OPT_GROUP("show specific options"),
 376                 OPT__DRY_RUN(&dry_run),
 377                 OPT_END()
 378         };
 379         struct ref_states states;
 380
 381         argc = parse_options(argc, argv, options, builtin_remote_usage, 0);
 382
 383         if (argc < 1)
 384                 usage_with_options(builtin_remote_usage, options);
 385
 386         memset(&states, 0, sizeof(states));
 387         for (; argc; argc--, argv++) {
 388                 struct transport *transport;
 389                 const struct ref *ref;
 390                 struct strbuf buf;
 391                 int i, got_states;
 392
 393                 states.remote = remote_get(*argv);
 394                 if (!states.remote)
 395                         return error("No such remote: %s", *argv);
 396                 transport = transport_get(NULL, states.remote->url_nr > 0 ?
 397                         states.remote->url[0] : NULL);
 398                 ref = transport_get_remote_refs(transport);
 399                 transport_disconnect(transport);
 400
 401                 read_branches();
 402                 got_states = get_ref_states(ref, &states);
 403                 if (got_states)
 404                         result = error("Error getting local info for '%s'",
 405                                         states.remote->name);
 406
 407                 if (prune) {
 408                         struct strbuf buf;
 409                         int prefix_len;
 410
 411                         strbuf_init(&buf, 0);
 412                         if (states.remote->fetch_refspec_nr == 1 &&
 413                                         states.remote->fetch->pattern &&
 414                                         !strcmp(states.remote->fetch->src,
 415                                                 states.remote->fetch->dst))
 416                                 /* handle --mirror remote */
 417                                 strbuf_addstr(&buf, "refs/heads/");
 418                         else
 419                                 strbuf_addf(&buf, "refs/remotes/%s/", *argv);
 420                         prefix_len = buf.len;
 421
 422                         for (i = 0; i < states.stale.nr; i++) {
 423                                 strbuf_setlen(&buf, prefix_len);
 424                                 strbuf_addstr(&buf, states.stale.items[i].path);
 425                                 result |= delete_ref(buf.buf, NULL);
 426                         }
 427
 428                         strbuf_release(&buf);
 429                         goto cleanup_states;
 430                 }
 431
 432                 printf("* remote %s\n  URL: %s\n", *argv,
 433                         states.remote->url_nr > 0 ?
 434                                 states.remote->url[0] : "(no URL)");
 435
 436                 for (i = 0; i < branch_list.nr; i++) {
 437                         struct path_list_item *branch = branch_list.items + i;
 438                         struct branch_info *info = branch->util;
 439                         int j;
 440
 441                         if (!info->merge.nr || strcmp(*argv, info->remote))
 442                                 continue;
 443                         printf("  Remote branch%s merged with 'git pull' "
 444                                 "while on branch %s\n   ",
 445                                 info->merge.nr > 1 ? "es" : "",
 446                                 branch->path);
 447                         for (j = 0; j < info->merge.nr; j++)
 448                                 printf(" %s", info->merge.items[j].path);
 449                         printf("\n");
 450                 }
 451
 452                 if (got_states)
 453                         continue;
 454                 strbuf_init(&buf, 0);
 455                 strbuf_addf(&buf, "  New remote branch%%s (next fetch will "
 456                         "store in remotes/%s)", states.remote->name);
 457                 show_list(buf.buf, &states.new);
 458                 strbuf_release(&buf);
 459                 show_list("  Stale tracking branch%s (use 'git remote prune')",
 460                                 &states.stale);
 461                 show_list("  Tracked remote branch%s",
 462                                 &states.tracked);
 463
 464                 if (states.remote->push_refspec_nr) {
 465                         printf("  Local branch%s pushed with 'git push'\n   ",
 466                                 states.remote->push_refspec_nr > 1 ?
 467                                         "es" : "");
 468                         for (i = 0; i < states.remote->push_refspec_nr; i++) {
 469                                 struct refspec *spec = states.remote->push + i;
 470                                 printf(" %s%s%s%s", spec->force ? "+" : "",
 471                                         skip_prefix(spec->src, "refs/heads/"),
 472                                         spec->dst ? ":" : "",
 473                                         skip_prefix(spec->dst, "refs/heads/"));
 474                         }
 475                 }
 476 cleanup_states:
 477                 /* NEEDSWORK: free remote */
 478                 path_list_clear(&states.new, 0);
 479                 path_list_clear(&states.stale, 0);
 480                 path_list_clear(&states.tracked, 0);
 481         }
 482
 483         return result;
 484 }
 485
 486 static int get_one_remote_for_update(struct remote *remote, void *priv)
 487 {
 488         struct path_list *list = priv;
 489         if (!remote->skip_default_update)
 490                 path_list_append(xstrdup(remote->name), list);
 491         return 0;
 492 }
 493
 494 struct remote_group {
 495         const char *name;
 496         struct path_list *list;
 497 } remote_group;
 498
 499 static int get_remote_group(const char *key, const char *value)
 500 {
 501         if (!prefixcmp(key, "remotes.") &&
 502                         !strcmp(key + 8, remote_group.name)) {
 503                 /* split list by white space */
 504                 int space = strcspn(value, " \t\n");
 505                 while (*value) {
 506                         if (space > 1)
 507                                 path_list_append(xstrndup(value, space),
 508                                                 remote_group.list);
 509                         value += space + (value[space] != '\0');
 510                         space = strcspn(value, " \t\n");
 511                 }
 512         }
 513
 514         return 0;
 515 }
 516
 517 static int update(int argc, const char **argv)
 518 {
 519         int i, result = 0;
 520         struct path_list list = { NULL, 0, 0, 0 };
 521         static const char *default_argv[] = { NULL, "default", NULL };
 522
 523         if (argc < 2) {
 524                 argc = 2;
 525                 argv = default_argv;
 526         }
 527
 528         remote_group.list = &list;
 529         for (i = 1; i < argc; i++) {
 530                 remote_group.name = argv[i];
 531                 result = git_config(get_remote_group);
 532         }
 533
 534         if (!result && !list.nr  && argc == 2 && !strcmp(argv[1], "default"))
 535                 result = for_each_remote(get_one_remote_for_update, &list);
 536
 537         for (i = 0; i < list.nr; i++)
 538                 result |= fetch_remote(list.items[i].path);
 539
 540         /* all names were strdup()ed or strndup()ed */
 541         list.strdup_paths = 1;
 542         path_list_clear(&list, 0);
 543
 544         return result;
 545 }
 546
 547 static int get_one_entry(struct remote *remote, void *priv)
 548 {
 549         struct path_list *list = priv;
 550
 551         path_list_append(remote->name, list)->util = remote->url_nr ?
 552                 (void *)remote->url[0] : NULL;
 553         if (remote->url_nr > 1)
 554                 warning("Remote %s has more than one URL", remote->name);
 555
 556         return 0;
 557 }
 558
 559 static int show_all(void)
 560 {
 561         struct path_list list = { NULL, 0, 0 };
 562         int result = for_each_remote(get_one_entry, &list);
 563
 564         if (!result) {
 565                 int i;
 566
 567                 sort_path_list(&list);
 568                 for (i = 0; i < list.nr; i++) {
 569                         struct path_list_item *item = list.items + i;
 570                         printf("%s%s%s\n", item->path,
 571                                 verbose ? "\t" : "",
 572                                 verbose && item->util ?
 573                                         (const char *)item->util : "");
 574                 }
 575         }
 576         return result;
 577 }
 578
 579 int cmd_remote(int argc, const char **argv, const char *prefix)
 580 {
 581         struct option options[] = {
 582                 OPT__VERBOSE(&verbose),
 583                 OPT_END()
 584         };
 585         int result;
 586
 587         argc = parse_options(argc, argv, options, builtin_remote_usage,
 588                 PARSE_OPT_STOP_AT_NON_OPTION);
 589
 590         if (argc < 1)
 591                 result = show_all();
 592         else if (!strcmp(argv[0], "add"))
 593                 result = add(argc, argv);
 594         else if (!strcmp(argv[0], "rm"))
 595                 result = rm(argc, argv);
 596         else if (!strcmp(argv[0], "show"))
 597                 result = show_or_prune(argc, argv, 0);
 598         else if (!strcmp(argv[0], "prune"))
 599                 result = show_or_prune(argc, argv, 1);
 600         else if (!strcmp(argv[0], "update"))
 601                 result = update(argc, argv);
 602         else {
 603                 error("Unknown subcommand: %s", argv[0]);
 604                 usage_with_options(builtin_remote_usage, options);
 605         }
 606
 607         return result ? 1 : 0;
 608 }