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