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                                 struct submodule_entry, ent /* member name */)
 104                 free_one_config(entry);
 105
 106         hashmap_free(&cache->for_path, 1);
 107         hashmap_free(&cache->for_name, 1);
 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, NULL,
 145                                         struct submodule_entry,
 146                                         ent /* member name */);
 147         free(removed);
 148 }
 149
 150 static void cache_add(struct submodule_cache *cache,
 151                       struct submodule *submodule)
 152 {
 153         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 154                                             submodule->name);
 155         struct submodule_entry *e = xmalloc(sizeof(*e));
 156         hashmap_entry_init(&e->ent, hash);
 157         e->config = submodule;
 158         hashmap_add(&cache->for_name, &e->ent);
 159 }
 160
 161 static const struct submodule *cache_lookup_path(struct submodule_cache *cache,
 162                 const struct object_id *gitmodules_oid, const char *path)
 163 {
 164         struct submodule_entry *entry;
 165         unsigned int hash = hash_oid_string(gitmodules_oid, path);
 166         struct submodule_entry key;
 167         struct submodule key_config;
 168
 169         oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
 170         key_config.path = path;
 171
 172         hashmap_entry_init(&key.ent, hash);
 173         key.config = &key_config;
 174
 175         entry = hashmap_get_entry(&cache->for_path, &key, NULL,
 176                                 struct submodule_entry, ent);
 177         if (entry)
 178                 return entry->config;
 179         return NULL;
 180 }
 181
 182 static struct submodule *cache_lookup_name(struct submodule_cache *cache,
 183                 const struct object_id *gitmodules_oid, const char *name)
 184 {
 185         struct submodule_entry *entry;
 186         unsigned int hash = hash_oid_string(gitmodules_oid, name);
 187         struct submodule_entry key;
 188         struct submodule key_config;
 189
 190         oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
 191         key_config.name = name;
 192
 193         hashmap_entry_init(&key.ent, hash);
 194         key.config = &key_config;
 195
 196         entry = hashmap_get_entry(&cache->for_name, &key, NULL,
 197                                 struct submodule_entry, ent);
 198         if (entry)
 199                 return entry->config;
 200         return NULL;
 201 }
 202
 203 int check_submodule_name(const char *name)
 204 {
 205         /* Disallow empty names */
 206         if (!*name)
 207                 return -1;
 208
 209         /*
 210          * Look for '..' as a path component. Check both '/' and '\\' as
 211          * separators rather than is_dir_sep(), because we want the name rules
 212          * to be consistent across platforms.
 213          */
 214         goto in_component; /* always start inside component */
 215         while (*name) {
 216                 char c = *name++;
 217                 if (c == '/' || c == '\\') {
 218 in_component:
 219                         if (name[0] == '.' && name[1] == '.' &&
 220                             (!name[2] || name[2] == '/' || name[2] == '\\'))
 221                                 return -1;
 222                 }
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int name_and_item_from_var(const char *var, struct strbuf *name,
 229                                   struct strbuf *item)
 230 {
 231         const char *subsection, *key;
 232         int subsection_len, parse;
 233         parse = parse_config_key(var, "submodule", &subsection,
 234                         &subsection_len, &key);
 235         if (parse < 0 || !subsection)
 236                 return 0;
 237
 238         strbuf_add(name, subsection, subsection_len);
 239         if (check_submodule_name(name->buf) < 0) {
 240                 warning(_("ignoring suspicious submodule name: %s"), name->buf);
 241                 strbuf_release(name);
 242                 return 0;
 243         }
 244
 245         strbuf_addstr(item, key);
 246
 247         return 1;
 248 }
 249
 250 static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
 251                 const struct object_id *gitmodules_oid, const char *name)
 252 {
 253         struct submodule *submodule;
 254         struct strbuf name_buf = STRBUF_INIT;
 255
 256         submodule = cache_lookup_name(cache, gitmodules_oid, name);
 257         if (submodule)
 258                 return submodule;
 259
 260         submodule = xmalloc(sizeof(*submodule));
 261
 262         strbuf_addstr(&name_buf, name);
 263         submodule->name = strbuf_detach(&name_buf, NULL);
 264
 265         submodule->path = NULL;
 266         submodule->url = NULL;
 267         submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
 268         submodule->update_strategy.command = NULL;
 269         submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
 270         submodule->ignore = NULL;
 271         submodule->branch = NULL;
 272         submodule->recommend_shallow = -1;
 273
 274         oidcpy(&submodule->gitmodules_oid, gitmodules_oid);
 275
 276         cache_add(cache, submodule);
 277
 278         return submodule;
 279 }
 280
 281 static int parse_fetch_recurse(const char *opt, const char *arg,
 282                                int die_on_error)
 283 {
 284         switch (git_parse_maybe_bool(arg)) {
 285         case 1:
 286                 return RECURSE_SUBMODULES_ON;
 287         case 0:
 288                 return RECURSE_SUBMODULES_OFF;
 289         default:
 290                 if (!strcmp(arg, "on-demand"))
 291                         return RECURSE_SUBMODULES_ON_DEMAND;
 292                 /*
 293                  * Please update $__git_fetch_recurse_submodules in
 294                  * git-completion.bash when you add new options.
 295                  */
 296                 if (die_on_error)
 297                         die("bad %s argument: %s", opt, arg);
 298                 else
 299                         return RECURSE_SUBMODULES_ERROR;
 300         }
 301 }
 302
 303 int parse_submodule_fetchjobs(const char *var, const char *value)
 304 {
 305         int fetchjobs = git_config_int(var, value);
 306         if (fetchjobs < 0)
 307                 die(_("negative values not allowed for submodule.fetchjobs"));
 308         return fetchjobs;
 309 }
 310
 311 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
 312 {
 313         return parse_fetch_recurse(opt, arg, 1);
 314 }
 315
 316 int option_fetch_parse_recurse_submodules(const struct option *opt,
 317                                           const char *arg, int unset)
 318 {
 319         int *v;
 320
 321         if (!opt->value)
 322                 return -1;
 323
 324         v = opt->value;
 325
 326         if (unset) {
 327                 *v = RECURSE_SUBMODULES_OFF;
 328         } else {
 329                 if (arg)
 330                         *v = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
 331                 else
 332                         *v = RECURSE_SUBMODULES_ON;
 333         }
 334         return 0;
 335 }
 336
 337 static int parse_update_recurse(const char *opt, const char *arg,
 338                                 int die_on_error)
 339 {
 340         switch (git_parse_maybe_bool(arg)) {
 341         case 1:
 342                 return RECURSE_SUBMODULES_ON;
 343         case 0:
 344                 return RECURSE_SUBMODULES_OFF;
 345         default:
 346                 if (die_on_error)
 347                         die("bad %s argument: %s", opt, arg);
 348                 return RECURSE_SUBMODULES_ERROR;
 349         }
 350 }
 351
 352 int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
 353 {
 354         return parse_update_recurse(opt, arg, 1);
 355 }
 356
 357 static int parse_push_recurse(const char *opt, const char *arg,
 358                                int die_on_error)
 359 {
 360         switch (git_parse_maybe_bool(arg)) {
 361         case 1:
 362                 /* There's no simple "on" value when pushing */
 363                 if (die_on_error)
 364                         die("bad %s argument: %s", opt, arg);
 365                 else
 366                         return RECURSE_SUBMODULES_ERROR;
 367         case 0:
 368                 return RECURSE_SUBMODULES_OFF;
 369         default:
 370                 if (!strcmp(arg, "on-demand"))
 371                         return RECURSE_SUBMODULES_ON_DEMAND;
 372                 else if (!strcmp(arg, "check"))
 373                         return RECURSE_SUBMODULES_CHECK;
 374                 else if (!strcmp(arg, "only"))
 375                         return RECURSE_SUBMODULES_ONLY;
 376                 /*
 377                  * Please update $__git_push_recurse_submodules in
 378                  * git-completion.bash when you add new modes.
 379                  */
 380                 else if (die_on_error)
 381                         die("bad %s argument: %s", opt, arg);
 382                 else
 383                         return RECURSE_SUBMODULES_ERROR;
 384         }
 385 }
 386
 387 int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
 388 {
 389         return parse_push_recurse(opt, arg, 1);
 390 }
 391
 392 static void warn_multiple_config(const struct object_id *treeish_name,
 393                                  const char *name, const char *option)
 394 {
 395         const char *commit_string = "WORKTREE";
 396         if (treeish_name)
 397                 commit_string = oid_to_hex(treeish_name);
 398         warning("%s:.gitmodules, multiple configurations found for "
 399                         "'submodule.%s.%s'. Skipping second one!",
 400                         commit_string, name, option);
 401 }
 402
 403 static void warn_command_line_option(const char *var, const char *value)
 404 {
 405         warning(_("ignoring '%s' which may be interpreted as"
 406                   " a command-line option: %s"), var, value);
 407 }
 408
 409 struct parse_config_parameter {
 410         struct submodule_cache *cache;
 411         const struct object_id *treeish_name;
 412         const struct object_id *gitmodules_oid;
 413         int overwrite;
 414 };
 415
 416 static int parse_config(const char *var, const char *value, void *data)
 417 {
 418         struct parse_config_parameter *me = data;
 419         struct submodule *submodule;
 420         struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
 421         int ret = 0;
 422
 423         /* this also ensures that we only parse submodule entries */
 424         if (!name_and_item_from_var(var, &name, &item))
 425                 return 0;
 426
 427         submodule = lookup_or_create_by_name(me->cache,
 428                                              me->gitmodules_oid,
 429                                              name.buf);
 430
 431         if (!strcmp(item.buf, "path")) {
 432                 if (!value)
 433                         ret = config_error_nonbool(var);
 434                 else if (looks_like_command_line_option(value))
 435                         warn_command_line_option(var, value);
 436                 else if (!me->overwrite && submodule->path)
 437                         warn_multiple_config(me->treeish_name, submodule->name,
 438                                         "path");
 439                 else {
 440                         if (submodule->path)
 441                                 cache_remove_path(me->cache, submodule);
 442                         free((void *) submodule->path);
 443                         submodule->path = xstrdup(value);
 444                         cache_put_path(me->cache, submodule);
 445                 }
 446         } else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
 447                 /* when parsing worktree configurations we can die early */
 448                 int die_on_error = is_null_oid(me->gitmodules_oid);
 449                 if (!me->overwrite &&
 450                     submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
 451                         warn_multiple_config(me->treeish_name, submodule->name,
 452                                         "fetchrecursesubmodules");
 453                 else
 454                         submodule->fetch_recurse = parse_fetch_recurse(
 455                                                                 var, value,
 456                                                                 die_on_error);
 457         } else if (!strcmp(item.buf, "ignore")) {
 458                 if (!value)
 459                         ret = config_error_nonbool(var);
 460                 else if (!me->overwrite && submodule->ignore)
 461                         warn_multiple_config(me->treeish_name, submodule->name,
 462                                         "ignore");
 463                 else if (strcmp(value, "untracked") &&
 464                          strcmp(value, "dirty") &&
 465                          strcmp(value, "all") &&
 466                          strcmp(value, "none"))
 467                         warning("Invalid parameter '%s' for config option "
 468                                         "'submodule.%s.ignore'", value, name.buf);
 469                 else {
 470                         free((void *) submodule->ignore);
 471                         submodule->ignore = xstrdup(value);
 472                 }
 473         } else if (!strcmp(item.buf, "url")) {
 474                 if (!value) {
 475                         ret = config_error_nonbool(var);
 476                 } else if (looks_like_command_line_option(value)) {
 477                         warn_command_line_option(var, value);
 478                 } else if (!me->overwrite && submodule->url) {
 479                         warn_multiple_config(me->treeish_name, submodule->name,
 480                                         "url");
 481                 } else {
 482                         free((void *) submodule->url);
 483                         submodule->url = xstrdup(value);
 484                 }
 485         } else if (!strcmp(item.buf, "update")) {
 486                 if (!value)
 487                         ret = config_error_nonbool(var);
 488                 else if (!me->overwrite &&
 489                          submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
 490                         warn_multiple_config(me->treeish_name, submodule->name,
 491                                              "update");
 492                 else if (parse_submodule_update_strategy(value,
 493                          &submodule->update_strategy) < 0)
 494                                 die(_("invalid value for %s"), var);
 495         } else if (!strcmp(item.buf, "shallow")) {
 496                 if (!me->overwrite && submodule->recommend_shallow != -1)
 497                         warn_multiple_config(me->treeish_name, submodule->name,
 498                                              "shallow");
 499                 else
 500                         submodule->recommend_shallow =
 501                                 git_config_bool(var, value);
 502         } else if (!strcmp(item.buf, "branch")) {
 503                 if (!me->overwrite && submodule->branch)
 504                         warn_multiple_config(me->treeish_name, submodule->name,
 505                                              "branch");
 506                 else {
 507                         free((void *)submodule->branch);
 508                         submodule->branch = xstrdup(value);
 509                 }
 510         }
 511
 512         strbuf_release(&name);
 513         strbuf_release(&item);
 514
 515         return ret;
 516 }
 517
 518 static int gitmodule_oid_from_commit(const struct object_id *treeish_name,
 519                                      struct object_id *gitmodules_oid,
 520                                      struct strbuf *rev)
 521 {
 522         int ret = 0;
 523
 524         if (is_null_oid(treeish_name)) {
 525                 oidclr(gitmodules_oid);
 526                 return 1;
 527         }
 528
 529         strbuf_addf(rev, "%s:.gitmodules", oid_to_hex(treeish_name));
 530         if (get_oid(rev->buf, gitmodules_oid) >= 0)
 531                 ret = 1;
 532
 533         return ret;
 534 }
 535
 536 /* This does a lookup of a submodule configuration by name or by path
 537  * (key) with on-demand reading of the appropriate .gitmodules from
 538  * revisions.
 539  */
 540 static const struct submodule *config_from(struct submodule_cache *cache,
 541                 const struct object_id *treeish_name, const char *key,
 542                 enum lookup_type lookup_type)
 543 {
 544         struct strbuf rev = STRBUF_INIT;
 545         unsigned long config_size;
 546         char *config = NULL;
 547         struct object_id oid;
 548         enum object_type type;
 549         const struct submodule *submodule = NULL;
 550         struct parse_config_parameter parameter;
 551
 552         /*
 553          * If any parameter except the cache is a NULL pointer just
 554          * return the first submodule. Can be used to check whether
 555          * there are any submodules parsed.
 556          */
 557         if (!treeish_name || !key) {
 558                 struct hashmap_iter iter;
 559                 struct submodule_entry *entry;
 560
 561                 entry = hashmap_iter_first_entry(&cache->for_name, &iter,
 562                                                 struct submodule_entry,
 563                                                 ent /* member name */);
 564                 if (!entry)
 565                         return NULL;
 566                 return entry->config;
 567         }
 568
 569         if (!gitmodule_oid_from_commit(treeish_name, &oid, &rev))
 570                 goto out;
 571
 572         switch (lookup_type) {
 573         case lookup_name:
 574                 submodule = cache_lookup_name(cache, &oid, key);
 575                 break;
 576         case lookup_path:
 577                 submodule = cache_lookup_path(cache, &oid, key);
 578                 break;
 579         }
 580         if (submodule)
 581                 goto out;
 582
 583         config = read_object_file(&oid, &type, &config_size);
 584         if (!config || type != OBJ_BLOB)
 585                 goto out;
 586
 587         /* fill the submodule config into the cache */
 588         parameter.cache = cache;
 589         parameter.treeish_name = treeish_name;
 590         parameter.gitmodules_oid = &oid;
 591         parameter.overwrite = 0;
 592         git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
 593                         config, config_size, &parameter, NULL);
 594         strbuf_release(&rev);
 595         free(config);
 596
 597         switch (lookup_type) {
 598         case lookup_name:
 599                 return cache_lookup_name(cache, &oid, key);
 600         case lookup_path:
 601                 return cache_lookup_path(cache, &oid, key);
 602         default:
 603                 return NULL;
 604         }
 605
 606 out:
 607         strbuf_release(&rev);
 608         free(config);
 609         return submodule;
 610 }
 611
 612 static void submodule_cache_check_init(struct repository *repo)
 613 {
 614         if (repo->submodule_cache && repo->submodule_cache->initialized)
 615                 return;
 616
 617         if (!repo->submodule_cache)
 618                 repo->submodule_cache = submodule_cache_alloc();
 619
 620         submodule_cache_init(repo->submodule_cache);
 621 }
 622
 623 /*
 624  * Note: This function is private for a reason, the '.gitmodules' file should
 625  * not be used as as a mechanism to retrieve arbitrary configuration stored in
 626  * the repository.
 627  *
 628  * Runs the provided config function on the '.gitmodules' file found in the
 629  * working directory.
 630  */
 631 static void config_from_gitmodules(config_fn_t fn, struct repository *repo, void *data)
 632 {
 633         if (repo->worktree) {
 634                 struct git_config_source config_source = { 0 };
 635                 const struct config_options opts = { 0 };
 636                 struct object_id oid;
 637                 char *file;
 638                 char *oidstr = NULL;
 639
 640                 file = repo_worktree_path(repo, GITMODULES_FILE);
 641                 if (file_exists(file)) {
 642                         config_source.file = file;
 643                 } else if (repo_get_oid(repo, GITMODULES_INDEX, &oid) >= 0 ||
 644                            repo_get_oid(repo, GITMODULES_HEAD, &oid) >= 0) {
 645                         config_source.blob = oidstr = xstrdup(oid_to_hex(&oid));
 646                         if (repo != the_repository)
 647                                 add_to_alternates_memory(repo->objects->odb->path);
 648                 } else {
 649                         goto out;
 650                 }
 651
 652                 config_with_options(fn, data, &config_source, &opts);
 653
 654 out:
 655                 free(oidstr);
 656                 free(file);
 657         }
 658 }
 659
 660 static int gitmodules_cb(const char *var, const char *value, void *data)
 661 {
 662         struct repository *repo = data;
 663         struct parse_config_parameter parameter;
 664
 665         parameter.cache = repo->submodule_cache;
 666         parameter.treeish_name = NULL;
 667         parameter.gitmodules_oid = &null_oid;
 668         parameter.overwrite = 1;
 669
 670         return parse_config(var, value, &parameter);
 671 }
 672
 673 void repo_read_gitmodules(struct repository *repo)
 674 {
 675         submodule_cache_check_init(repo);
 676
 677         if (repo_read_index(repo) < 0)
 678                 return;
 679
 680         if (!is_gitmodules_unmerged(repo->index))
 681                 config_from_gitmodules(gitmodules_cb, repo, repo);
 682
 683         repo->submodule_cache->gitmodules_read = 1;
 684 }
 685
 686 void gitmodules_config_oid(const struct object_id *commit_oid)
 687 {
 688         struct strbuf rev = STRBUF_INIT;
 689         struct object_id oid;
 690
 691         submodule_cache_check_init(the_repository);
 692
 693         if (gitmodule_oid_from_commit(commit_oid, &oid, &rev)) {
 694                 git_config_from_blob_oid(gitmodules_cb, rev.buf,
 695                                          &oid, the_repository);
 696         }
 697         strbuf_release(&rev);
 698
 699         the_repository->submodule_cache->gitmodules_read = 1;
 700 }
 701
 702 static void gitmodules_read_check(struct repository *repo)
 703 {
 704         submodule_cache_check_init(repo);
 705
 706         /* read the repo's .gitmodules file if it hasn't been already */
 707         if (!repo->submodule_cache->gitmodules_read)
 708                 repo_read_gitmodules(repo);
 709 }
 710
 711 const struct submodule *submodule_from_name(struct repository *r,
 712                                             const struct object_id *treeish_name,
 713                 const char *name)
 714 {
 715         gitmodules_read_check(r);
 716         return config_from(r->submodule_cache, treeish_name, name, lookup_name);
 717 }
 718
 719 const struct submodule *submodule_from_path(struct repository *r,
 720                                             const struct object_id *treeish_name,
 721                 const char *path)
 722 {
 723         gitmodules_read_check(r);
 724         return config_from(r->submodule_cache, treeish_name, path, lookup_path);
 725 }
 726
 727 void submodule_free(struct repository *r)
 728 {
 729         if (r->submodule_cache)
 730                 submodule_cache_clear(r->submodule_cache);
 731 }
 732
 733 static int config_print_callback(const char *var, const char *value, void *cb_data)
 734 {
 735         char *wanted_key = cb_data;
 736
 737         if (!strcmp(wanted_key, var))
 738                 printf("%s\n", value);
 739
 740         return 0;
 741 }
 742
 743 int print_config_from_gitmodules(struct repository *repo, const char *key)
 744 {
 745         int ret;
 746         char *store_key;
 747
 748         ret = git_config_parse_key(key, &store_key, NULL);
 749         if (ret < 0)
 750                 return CONFIG_INVALID_KEY;
 751
 752         config_from_gitmodules(config_print_callback, repo, store_key);
 753
 754         free(store_key);
 755         return 0;
 756 }
 757
 758 int config_set_in_gitmodules_file_gently(const char *key, const char *value)
 759 {
 760         int ret;
 761
 762         ret = git_config_set_in_file_gently(GITMODULES_FILE, key, value);
 763         if (ret < 0)
 764                 /* Maybe the user already did that, don't error out here */
 765                 warning(_("Could not update .gitmodules entry %s"), key);
 766
 767         return ret;
 768 }
 769
 770 struct fetch_config {
 771         int *max_children;
 772         int *recurse_submodules;
 773 };
 774
 775 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
 776 {
 777         struct fetch_config *config = cb;
 778         if (!strcmp(var, "submodule.fetchjobs")) {
 779                 *(config->max_children) = parse_submodule_fetchjobs(var, value);
 780                 return 0;
 781         } else if (!strcmp(var, "fetch.recursesubmodules")) {
 782                 *(config->recurse_submodules) = parse_fetch_recurse_submodules_arg(var, value);
 783                 return 0;
 784         }
 785
 786         return 0;
 787 }
 788
 789 void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules)
 790 {
 791         struct fetch_config config = {
 792                 .max_children = max_children,
 793                 .recurse_submodules = recurse_submodules
 794         };
 795         config_from_gitmodules(gitmodules_fetch_config, the_repository, &config);
 796 }
 797
 798 static int gitmodules_update_clone_config(const char *var, const char *value,
 799                                           void *cb)
 800 {
 801         int *max_jobs = cb;
 802         if (!strcmp(var, "submodule.fetchjobs"))
 803                 *max_jobs = parse_submodule_fetchjobs(var, value);
 804         return 0;
 805 }
 806
 807 void update_clone_config_from_gitmodules(int *max_jobs)
 808 {
 809         config_from_gitmodules(gitmodules_update_clone_config, the_repository, &max_jobs);
 810 }