submodule-config.c

   1 #include "cache.h"
   2 #include "dir.h"
   3 #include "repository.h"
   4 #include "config.h"
   5 #include "submodule-config.h"
   6 #include "submodule.h"
   7 #include "strbuf.h"
   8 #include "object-store.h"
   9 #include "parse-options.h"
  10
  11 /*
  12  * submodule cache lookup structure
  13  * There is one shared set of 'struct submodule' entries which can be
  14  * looked up by their sha1 blob id of the .gitmodules file and either
  15  * using path or name as key.
  16  * for_path stores submodule entries with path as key
  17  * for_name stores submodule entries with name as key
  18  */
  19 struct submodule_cache {
  20         struct hashmap for_path;
  21         struct hashmap for_name;
  22         unsigned initialized:1;
  23         unsigned gitmodules_read:1;
  24 };
  25
  26 /*
  27  * thin wrapper struct needed to insert 'struct submodule' entries to
  28  * the hashmap
  29  */
  30 struct submodule_entry {
  31         struct hashmap_entry ent;
  32         struct submodule *config;
  33 };
  34
  35 enum lookup_type {
  36         lookup_name,
  37         lookup_path
  38 };
  39
  40 static int config_path_cmp(const void *unused_cmp_data,
  41                            const struct hashmap_entry *eptr,
  42                            const struct hashmap_entry *entry_or_key,
  43                            const void *unused_keydata)
  44 {
  45         const struct submodule_entry *a, *b;
  46
  47         a = container_of(eptr, const struct submodule_entry, ent);
  48         b = container_of(entry_or_key, const struct submodule_entry, ent);
  49
  50         return strcmp(a->config->path, b->config->path) ||
  51                !oideq(&a->config->gitmodules_oid, &b->config->gitmodules_oid);
  52 }
  53
  54 static int config_name_cmp(const void *unused_cmp_data,
  55                            const struct hashmap_entry *eptr,
  56                            const struct hashmap_entry *entry_or_key,
  57                            const void *unused_keydata)
  58 {
  59         const struct submodule_entry *a, *b;
  60
  61         a = container_of(eptr, const struct submodule_entry, ent);
  62         b = container_of(entry_or_key, const struct submodule_entry, ent);
  63
  64         return strcmp(a->config->name, b->config->name) ||
  65                !oideq(&a->config->gitmodules_oid, &b->config->gitmodules_oid);
  66 }
  67
  68 static struct submodule_cache *submodule_cache_alloc(void)
  69 {
  70         return xcalloc(1, sizeof(struct submodule_cache));
  71 }
  72
  73 static void submodule_cache_init(struct submodule_cache *cache)
  74 {
  75         hashmap_init(&cache->for_path, config_path_cmp, NULL, 0);
  76         hashmap_init(&cache->for_name, config_name_cmp, NULL, 0);
  77         cache->initialized = 1;
  78 }
  79
  80 static void free_one_config(struct submodule_entry *entry)
  81 {
  82         free((void *) entry->config->path);
  83         free((void *) entry->config->name);
  84         free((void *) entry->config->branch);
  85         free((void *) entry->config->update_strategy.command);
  86         free(entry->config);
  87 }
  88
  89 static void submodule_cache_clear(struct submodule_cache *cache)
  90 {
  91         struct hashmap_iter iter;
  92         struct submodule_entry *entry;
  93
  94         if (!cache->initialized)
  95                 return;
  96
  97         /*
  98          * We iterate over the name hash here to be symmetric with the
  99          * allocation of struct submodule entries. Each is allocated by
 100          * their .gitmodules blob sha1 and submodule name.
 101          */
 102         hashmap_for_each_entry(&cache->for_name, &iter, entry,
 103                                 ent /* member name */)
 104                 free_one_config(entry);
 105
 106         hashmap_free_entries(&cache->for_path, struct submodule_entry, ent);
 107         hashmap_free_entries(&cache->for_name, struct submodule_entry, ent);
 108         cache->initialized = 0;
 109         cache->gitmodules_read = 0;
 110 }
 111
 112 void submodule_cache_free(struct submodule_cache *cache)
 113 {
 114         submodule_cache_clear(cache);
 115         free(cache);
 116 }
 117
 118 static unsigned int hash_oid_string(const struct object_id *oid,
 119                                     const char *string)
 120 {
 121         return memhash(oid->hash, the_hash_algo->rawsz) + strhash(string);
 122 }
 123
 124 static void cache_put_path(struct submodule_cache *cache,
 125                            struct submodule *submodule)
 126 {
 127         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 128                                             submodule->path);
 129         struct submodule_entry *e = xmalloc(sizeof(*e));
 130         hashmap_entry_init(&e->ent, hash);
 131         e->config = submodule;
 132         hashmap_put(&cache->for_path, &e->ent);
 133 }
 134
 135 static void cache_remove_path(struct submodule_cache *cache,
 136                               struct submodule *submodule)
 137 {
 138         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 139                                             submodule->path);
 140         struct submodule_entry e;
 141         struct submodule_entry *removed;
 142         hashmap_entry_init(&e.ent, hash);
 143         e.config = submodule;
 144         removed = hashmap_remove_entry(&cache->for_path, &e, ent, NULL);
 145         free(removed);
 146 }
 147
 148 static void cache_add(struct submodule_cache *cache,
 149                       struct submodule *submodule)
 150 {
 151         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 152                                             submodule->name);
 153         struct submodule_entry *e = xmalloc(sizeof(*e));
 154         hashmap_entry_init(&e->ent, hash);
 155         e->config = submodule;
 156         hashmap_add(&cache->for_name, &e->ent);
 157 }
 158
 159 static const struct submodule *cache_lookup_path(struct submodule_cache *cache,
 160                 const struct object_id *gitmodules_oid, const char *path)
 161 {
 162         struct submodule_entry *entry;
 163         unsigned int hash = hash_oid_string(gitmodules_oid, path);
 164         struct submodule_entry key;
 165         struct submodule key_config;
 166
 167         oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
 168         key_config.path = path;
 169
 170         hashmap_entry_init(&key.ent, hash);
 171         key.config = &key_config;
 172
 173         entry = hashmap_get_entry(&cache->for_path, &key, ent, NULL);
 174         if (entry)
 175                 return entry->config;
 176         return NULL;
 177 }
 178
 179 static struct submodule *cache_lookup_name(struct submodule_cache *cache,
 180                 const struct object_id *gitmodules_oid, const char *name)
 181 {
 182         struct submodule_entry *entry;
 183         unsigned int hash = hash_oid_string(gitmodules_oid, name);
 184         struct submodule_entry key;
 185         struct submodule key_config;
 186
 187         oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
 188         key_config.name = name;
 189
 190         hashmap_entry_init(&key.ent, hash);
 191         key.config = &key_config;
 192
 193         entry = hashmap_get_entry(&cache->for_name, &key, ent, NULL);
 194         if (entry)
 195                 return entry->config;
 196         return NULL;
 197 }
 198
 199 int check_submodule_name(const char *name)
 200 {
 201         /* Disallow empty names */
 202         if (!*name)
 203                 return -1;
 204
 205         /*
 206          * Look for '..' as a path component. Check both '/' and '\\' as
 207          * separators rather than is_dir_sep(), because we want the name rules
 208          * to be consistent across platforms.
 209          */
 210         goto in_component; /* always start inside component */
 211         while (*name) {
 212                 char c = *name++;
 213                 if (c == '/' || c == '\\') {
 214 in_component:
 215                         if (name[0] == '.' && name[1] == '.' &&
 216                             (!name[2] || name[2] == '/' || name[2] == '\\'))
 217                                 return -1;
 218                 }
 219         }
 220
 221         return 0;
 222 }
 223
 224 static int name_and_item_from_var(const char *var, struct strbuf *name,
 225                                   struct strbuf *item)
 226 {
 227         const char *subsection, *key;
 228         int subsection_len, parse;
 229         parse = parse_config_key(var, "submodule", &subsection,
 230                         &subsection_len, &key);
 231         if (parse < 0 || !subsection)
 232                 return 0;
 233
 234         strbuf_add(name, subsection, subsection_len);
 235         if (check_submodule_name(name->buf) < 0) {
 236                 warning(_("ignoring suspicious submodule name: %s"), name->buf);
 237                 strbuf_release(name);
 238                 return 0;
 239         }
 240
 241         strbuf_addstr(item, key);
 242
 243         return 1;
 244 }
 245
 246 static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
 247                 const struct object_id *gitmodules_oid, const char *name)
 248 {
 249         struct submodule *submodule;
 250         struct strbuf name_buf = STRBUF_INIT;
 251
 252         submodule = cache_lookup_name(cache, gitmodules_oid, name);
 253         if (submodule)
 254                 return submodule;
 255
 256         submodule = xmalloc(sizeof(*submodule));
 257
 258         strbuf_addstr(&name_buf, name);
 259         submodule->name = strbuf_detach(&name_buf, NULL);
 260
 261         submodule->path = NULL;
 262         submodule->url = NULL;
 263         submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
 264         submodule->update_strategy.command = NULL;
 265         submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
 266         submodule->ignore = NULL;
 267         submodule->branch = NULL;
 268         submodule->recommend_shallow = -1;
 269
 270         oidcpy(&submodule->gitmodules_oid, gitmodules_oid);
 271
 272         cache_add(cache, submodule);
 273
 274         return submodule;
 275 }
 276
 277 static int parse_fetch_recurse(const char *opt, const char *arg,
 278                                int die_on_error)
 279 {
 280         switch (git_parse_maybe_bool(arg)) {
 281         case 1:
 282                 return RECURSE_SUBMODULES_ON;
 283         case 0:
 284                 return RECURSE_SUBMODULES_OFF;
 285         default:
 286                 if (!strcmp(arg, "on-demand"))
 287                         return RECURSE_SUBMODULES_ON_DEMAND;
 288                 /*
 289                  * Please update $__git_fetch_recurse_submodules in
 290                  * git-completion.bash when you add new options.
 291                  */
 292                 if (die_on_error)
 293                         die("bad %s argument: %s", opt, arg);
 294                 else
 295                         return RECURSE_SUBMODULES_ERROR;
 296         }
 297 }
 298
 299 int parse_submodule_fetchjobs(const char *var, const char *value)
 300 {
 301         int fetchjobs = git_config_int(var, value);
 302         if (fetchjobs < 0)
 303                 die(_("negative values not allowed for submodule.fetchjobs"));
 304         return fetchjobs;
 305 }
 306
 307 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
 308 {
 309         return parse_fetch_recurse(opt, arg, 1);
 310 }
 311
 312 int option_fetch_parse_recurse_submodules(const struct option *opt,
 313                                           const char *arg, int unset)
 314 {
 315         int *v;
 316
 317         if (!opt->value)
 318                 return -1;
 319
 320         v = opt->value;
 321
 322         if (unset) {
 323                 *v = RECURSE_SUBMODULES_OFF;
 324         } else {
 325                 if (arg)
 326                         *v = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
 327                 else
 328                         *v = RECURSE_SUBMODULES_ON;
 329         }
 330         return 0;
 331 }
 332
 333 static int parse_update_recurse(const char *opt, const char *arg,
 334                                 int die_on_error)
 335 {
 336         switch (git_parse_maybe_bool(arg)) {
 337         case 1:
 338                 return RECURSE_SUBMODULES_ON;
 339         case 0:
 340                 return RECURSE_SUBMODULES_OFF;
 341         default:
 342                 if (die_on_error)
 343                         die("bad %s argument: %s", opt, arg);
 344                 return RECURSE_SUBMODULES_ERROR;
 345         }
 346 }
 347
 348 int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
 349 {
 350         return parse_update_recurse(opt, arg, 1);
 351 }
 352
 353 static int parse_push_recurse(const char *opt, const char *arg,
 354                                int die_on_error)
 355 {
 356         switch (git_parse_maybe_bool(arg)) {
 357         case 1:
 358                 /* There's no simple "on" value when pushing */
 359                 if (die_on_error)
 360                         die("bad %s argument: %s", opt, arg);
 361                 else
 362                         return RECURSE_SUBMODULES_ERROR;
 363         case 0:
 364                 return RECURSE_SUBMODULES_OFF;
 365         default:
 366                 if (!strcmp(arg, "on-demand"))
 367                         return RECURSE_SUBMODULES_ON_DEMAND;
 368                 else if (!strcmp(arg, "check"))
 369                         return RECURSE_SUBMODULES_CHECK;
 370                 else if (!strcmp(arg, "only"))
 371                         return RECURSE_SUBMODULES_ONLY;
 372                 /*
 373                  * Please update $__git_push_recurse_submodules in
 374                  * git-completion.bash when you add new modes.
 375                  */
 376                 else if (die_on_error)
 377                         die("bad %s argument: %s", opt, arg);
 378                 else
 379                         return RECURSE_SUBMODULES_ERROR;
 380         }
 381 }
 382
 383 int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
 384 {
 385         return parse_push_recurse(opt, arg, 1);
 386 }
 387
 388 static void warn_multiple_config(const struct object_id *treeish_name,
 389                                  const char *name, const char *option)
 390 {
 391         const char *commit_string = "WORKTREE";
 392         if (treeish_name)
 393                 commit_string = oid_to_hex(treeish_name);
 394         warning("%s:.gitmodules, multiple configurations found for "
 395                         "'submodule.%s.%s'. Skipping second one!",
 396                         commit_string, name, option);
 397 }
 398
 399 static void warn_command_line_option(const char *var, const char *value)
 400 {
 401         warning(_("ignoring '%s' which may be interpreted as"
 402                   " a command-line option: %s"), var, value);
 403 }
 404
 405 struct parse_config_parameter {
 406         struct submodule_cache *cache;
 407         const struct object_id *treeish_name;
 408         const struct object_id *gitmodules_oid;
 409         int overwrite;
 410 };
 411
 412 static int parse_config(const char *var, const char *value, void *data)
 413 {
 414         struct parse_config_parameter *me = data;
 415         struct submodule *submodule;
 416         struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
 417         int ret = 0;
 418
 419         /* this also ensures that we only parse submodule entries */
 420         if (!name_and_item_from_var(var, &name, &item))
 421                 return 0;
 422
 423         submodule = lookup_or_create_by_name(me->cache,
 424                                              me->gitmodules_oid,
 425                                              name.buf);
 426
 427         if (!strcmp(item.buf, "path")) {
 428                 if (!value)
 429                         ret = config_error_nonbool(var);
 430                 else if (looks_like_command_line_option(value))
 431                         warn_command_line_option(var, value);
 432                 else if (!me->overwrite && submodule->path)
 433                         warn_multiple_config(me->treeish_name, submodule->name,
 434                                         "path");
 435                 else {
 436                         if (submodule->path)
 437                                 cache_remove_path(me->cache, submodule);
 438                         free((void *) submodule->path);
 439                         submodule->path = xstrdup(value);
 440                         cache_put_path(me->cache, submodule);
 441                 }
 442         } else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
 443                 /* when parsing worktree configurations we can die early */
 444                 int die_on_error = is_null_oid(me->gitmodules_oid);
 445                 if (!me->overwrite &&
 446                     submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
 447                         warn_multiple_config(me->treeish_name, submodule->name,
 448                                         "fetchrecursesubmodules");
 449                 else
 450                         submodule->fetch_recurse = parse_fetch_recurse(
 451                                                                 var, value,
 452                                                                 die_on_error);
 453         } else if (!strcmp(item.buf, "ignore")) {
 454                 if (!value)
 455                         ret = config_error_nonbool(var);
 456                 else if (!me->overwrite && submodule->ignore)
 457                         warn_multiple_config(me->treeish_name, submodule->name,
 458                                         "ignore");
 459                 else if (strcmp(value, "untracked") &&
 460                          strcmp(value, "dirty") &&
 461                          strcmp(value, "all") &&
 462                          strcmp(value, "none"))
 463                         warning("Invalid parameter '%s' for config option "
 464                                         "'submodule.%s.ignore'", value, name.buf);
 465                 else {
 466                         free((void *) submodule->ignore);
 467                         submodule->ignore = xstrdup(value);
 468                 }
 469         } else if (!strcmp(item.buf, "url")) {
 470                 if (!value) {
 471                         ret = config_error_nonbool(var);
 472                 } else if (looks_like_command_line_option(value)) {
 473                         warn_command_line_option(var, value);
 474                 } else if (!me->overwrite && submodule->url) {
 475                         warn_multiple_config(me->treeish_name, submodule->name,
 476                                         "url");
 477                 } else {
 478                         free((void *) submodule->url);
 479                         submodule->url = xstrdup(value);
 480                 }
 481         } else if (!strcmp(item.buf, "update")) {
 482                 if (!value)
 483                         ret = config_error_nonbool(var);
 484                 else if (!me->overwrite &&
 485                          submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
 486                         warn_multiple_config(me->treeish_name, submodule->name,
 487                                              "update");
 488                 else if (parse_submodule_update_strategy(value,
 489                          &submodule->update_strategy) < 0)
 490                                 die(_("invalid value for %s"), var);
 491         } else if (!strcmp(item.buf, "shallow")) {
 492                 if (!me->overwrite && submodule->recommend_shallow != -1)
 493                         warn_multiple_config(me->treeish_name, submodule->name,
 494                                              "shallow");
 495                 else
 496                         submodule->recommend_shallow =
 497                                 git_config_bool(var, value);
 498         } else if (!strcmp(item.buf, "branch")) {
 499                 if (!me->overwrite && submodule->branch)
 500                         warn_multiple_config(me->treeish_name, submodule->name,
 501                                              "branch");
 502                 else {
 503                         free((void *)submodule->branch);
 504                         submodule->branch = xstrdup(value);
 505                 }
 506         }
 507
 508         strbuf_release(&name);
 509         strbuf_release(&item);
 510
 511         return ret;
 512 }
 513
 514 static int gitmodule_oid_from_commit(const struct object_id *treeish_name,
 515                                      struct object_id *gitmodules_oid,
 516                                      struct strbuf *rev)
 517 {
 518         int ret = 0;
 519
 520         if (is_null_oid(treeish_name)) {
 521                 oidclr(gitmodules_oid);
 522                 return 1;
 523         }
 524
 525         strbuf_addf(rev, "%s:.gitmodules", oid_to_hex(treeish_name));
 526         if (get_oid(rev->buf, gitmodules_oid) >= 0)
 527                 ret = 1;
 528
 529         return ret;
 530 }
 531
 532 /* This does a lookup of a submodule configuration by name or by path
 533  * (key) with on-demand reading of the appropriate .gitmodules from
 534  * revisions.
 535  */
 536 static const struct submodule *config_from(struct submodule_cache *cache,
 537                 const struct object_id *treeish_name, const char *key,
 538                 enum lookup_type lookup_type)
 539 {
 540         struct strbuf rev = STRBUF_INIT;
 541         unsigned long config_size;
 542         char *config = NULL;
 543         struct object_id oid;
 544         enum object_type type;
 545         const struct submodule *submodule = NULL;
 546         struct parse_config_parameter parameter;
 547
 548         /*
 549          * If any parameter except the cache is a NULL pointer just
 550          * return the first submodule. Can be used to check whether
 551          * there are any submodules parsed.
 552          */
 553         if (!treeish_name || !key) {
 554                 struct hashmap_iter iter;
 555                 struct submodule_entry *entry;
 556
 557                 entry = hashmap_iter_first_entry(&cache->for_name, &iter,
 558                                                 struct submodule_entry,
 559                                                 ent /* member name */);
 560                 if (!entry)
 561                         return NULL;
 562                 return entry->config;
 563         }
 564
 565         if (!gitmodule_oid_from_commit(treeish_name, &oid, &rev))
 566                 goto out;
 567
 568         switch (lookup_type) {
 569         case lookup_name:
 570                 submodule = cache_lookup_name(cache, &oid, key);
 571                 break;
 572         case lookup_path:
 573                 submodule = cache_lookup_path(cache, &oid, key);
 574                 break;
 575         }
 576         if (submodule)
 577                 goto out;
 578
 579         config = read_object_file(&oid, &type, &config_size);
 580         if (!config || type != OBJ_BLOB)
 581                 goto out;
 582
 583         /* fill the submodule config into the cache */
 584         parameter.cache = cache;
 585         parameter.treeish_name = treeish_name;
 586         parameter.gitmodules_oid = &oid;
 587         parameter.overwrite = 0;
 588         git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
 589                         config, config_size, &parameter, NULL);
 590         strbuf_release(&rev);
 591         free(config);
 592
 593         switch (lookup_type) {
 594         case lookup_name:
 595                 return cache_lookup_name(cache, &oid, key);
 596         case lookup_path:
 597                 return cache_lookup_path(cache, &oid, key);
 598         default:
 599                 return NULL;
 600         }
 601
 602 out:
 603         strbuf_release(&rev);
 604         free(config);
 605         return submodule;
 606 }
 607
 608 static void submodule_cache_check_init(struct repository *repo)
 609 {
 610         if (repo->submodule_cache && repo->submodule_cache->initialized)
 611                 return;
 612
 613         if (!repo->submodule_cache)
 614                 repo->submodule_cache = submodule_cache_alloc();
 615
 616         submodule_cache_init(repo->submodule_cache);
 617 }
 618
 619 /*
 620  * Note: This function is private for a reason, the '.gitmodules' file should
 621  * not be used as as a mechanism to retrieve arbitrary configuration stored in
 622  * the repository.
 623  *
 624  * Runs the provided config function on the '.gitmodules' file found in the
 625  * working directory.
 626  */
 627 static void config_from_gitmodules(config_fn_t fn, struct repository *repo, void *data)
 628 {
 629         if (repo->worktree) {
 630                 struct git_config_source config_source = { 0 };
 631                 const struct config_options opts = { 0 };
 632                 struct object_id oid;
 633                 char *file;
 634                 char *oidstr = NULL;
 635
 636                 file = repo_worktree_path(repo, GITMODULES_FILE);
 637                 if (file_exists(file)) {
 638                         config_source.file = file;
 639                 } else if (repo_get_oid(repo, GITMODULES_INDEX, &oid) >= 0 ||
 640                            repo_get_oid(repo, GITMODULES_HEAD, &oid) >= 0) {
 641                         config_source.blob = oidstr = xstrdup(oid_to_hex(&oid));
 642                         if (repo != the_repository)
 643                                 add_to_alternates_memory(repo->objects->odb->path);
 644                 } else {
 645                         goto out;
 646                 }
 647
 648                 config_with_options(fn, data, &config_source, &opts);
 649
 650 out:
 651                 free(oidstr);
 652                 free(file);
 653         }
 654 }
 655
 656 static int gitmodules_cb(const char *var, const char *value, void *data)
 657 {
 658         struct repository *repo = data;
 659         struct parse_config_parameter parameter;
 660
 661         parameter.cache = repo->submodule_cache;
 662         parameter.treeish_name = NULL;
 663         parameter.gitmodules_oid = &null_oid;
 664         parameter.overwrite = 1;
 665
 666         return parse_config(var, value, &parameter);
 667 }
 668
 669 void repo_read_gitmodules(struct repository *repo)
 670 {
 671         submodule_cache_check_init(repo);
 672
 673         if (repo_read_index(repo) < 0)
 674                 return;
 675
 676         if (!is_gitmodules_unmerged(repo->index))
 677                 config_from_gitmodules(gitmodules_cb, repo, repo);
 678
 679         repo->submodule_cache->gitmodules_read = 1;
 680 }
 681
 682 void gitmodules_config_oid(const struct object_id *commit_oid)
 683 {
 684         struct strbuf rev = STRBUF_INIT;
 685         struct object_id oid;
 686
 687         submodule_cache_check_init(the_repository);
 688
 689         if (gitmodule_oid_from_commit(commit_oid, &oid, &rev)) {
 690                 git_config_from_blob_oid(gitmodules_cb, rev.buf,
 691                                          &oid, the_repository);
 692         }
 693         strbuf_release(&rev);
 694
 695         the_repository->submodule_cache->gitmodules_read = 1;
 696 }
 697
 698 static void gitmodules_read_check(struct repository *repo)
 699 {
 700         submodule_cache_check_init(repo);
 701
 702         /* read the repo's .gitmodules file if it hasn't been already */
 703         if (!repo->submodule_cache->gitmodules_read)
 704                 repo_read_gitmodules(repo);
 705 }
 706
 707 const struct submodule *submodule_from_name(struct repository *r,
 708                                             const struct object_id *treeish_name,
 709                 const char *name)
 710 {
 711         gitmodules_read_check(r);
 712         return config_from(r->submodule_cache, treeish_name, name, lookup_name);
 713 }
 714
 715 const struct submodule *submodule_from_path(struct repository *r,
 716                                             const struct object_id *treeish_name,
 717                 const char *path)
 718 {
 719         gitmodules_read_check(r);
 720         return config_from(r->submodule_cache, treeish_name, path, lookup_path);
 721 }
 722
 723 void submodule_free(struct repository *r)
 724 {
 725         if (r->submodule_cache)
 726                 submodule_cache_clear(r->submodule_cache);
 727 }
 728
 729 static int config_print_callback(const char *var, const char *value, void *cb_data)
 730 {
 731         char *wanted_key = cb_data;
 732
 733         if (!strcmp(wanted_key, var))
 734                 printf("%s\n", value);
 735
 736         return 0;
 737 }
 738
 739 int print_config_from_gitmodules(struct repository *repo, const char *key)
 740 {
 741         int ret;
 742         char *store_key;
 743
 744         ret = git_config_parse_key(key, &store_key, NULL);
 745         if (ret < 0)
 746                 return CONFIG_INVALID_KEY;
 747
 748         config_from_gitmodules(config_print_callback, repo, store_key);
 749
 750         free(store_key);
 751         return 0;
 752 }
 753
 754 int config_set_in_gitmodules_file_gently(const char *key, const char *value)
 755 {
 756         int ret;
 757
 758         ret = git_config_set_in_file_gently(GITMODULES_FILE, key, value);
 759         if (ret < 0)
 760                 /* Maybe the user already did that, don't error out here */
 761                 warning(_("Could not update .gitmodules entry %s"), key);
 762
 763         return ret;
 764 }
 765
 766 struct fetch_config {
 767         int *max_children;
 768         int *recurse_submodules;
 769 };
 770
 771 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
 772 {
 773         struct fetch_config *config = cb;
 774         if (!strcmp(var, "submodule.fetchjobs")) {
 775                 *(config->max_children) = parse_submodule_fetchjobs(var, value);
 776                 return 0;
 777         } else if (!strcmp(var, "fetch.recursesubmodules")) {
 778                 *(config->recurse_submodules) = parse_fetch_recurse_submodules_arg(var, value);
 779                 return 0;
 780         }
 781
 782         return 0;
 783 }
 784
 785 void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules)
 786 {
 787         struct fetch_config config = {
 788                 .max_children = max_children,
 789                 .recurse_submodules = recurse_submodules
 790         };
 791         config_from_gitmodules(gitmodules_fetch_config, the_repository, &config);
 792 }
 793
 794 static int gitmodules_update_clone_config(const char *var, const char *value,
 795                                           void *cb)
 796 {
 797         int *max_jobs = cb;
 798         if (!strcmp(var, "submodule.fetchjobs"))
 799                 *max_jobs = parse_submodule_fetchjobs(var, value);
 800         return 0;
 801 }
 802
 803 void update_clone_config_from_gitmodules(int *max_jobs)
 804 {
 805         config_from_gitmodules(gitmodules_update_clone_config, the_repository, &max_jobs);
 806 }