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