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                oidcmp(&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                oidcmp(&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                 if (die_on_error)
 286                         die("bad %s argument: %s", opt, arg);
 287                 else
 288                         return RECURSE_SUBMODULES_ERROR;
 289         }
 290 }
 291
 292 int parse_submodule_fetchjobs(const char *var, const char *value)
 293 {
 294         int fetchjobs = git_config_int(var, value);
 295         if (fetchjobs < 0)
 296                 die(_("negative values not allowed for submodule.fetchjobs"));
 297         return fetchjobs;
 298 }
 299
 300 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
 301 {
 302         return parse_fetch_recurse(opt, arg, 1);
 303 }
 304
 305 int option_fetch_parse_recurse_submodules(const struct option *opt,
 306                                           const char *arg, int unset)
 307 {
 308         int *v;
 309
 310         if (!opt->value)
 311                 return -1;
 312
 313         v = opt->value;
 314
 315         if (unset) {
 316                 *v = RECURSE_SUBMODULES_OFF;
 317         } else {
 318                 if (arg)
 319                         *v = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
 320                 else
 321                         *v = RECURSE_SUBMODULES_ON;
 322         }
 323         return 0;
 324 }
 325
 326 static int parse_update_recurse(const char *opt, const char *arg,
 327                                 int die_on_error)
 328 {
 329         switch (git_parse_maybe_bool(arg)) {
 330         case 1:
 331                 return RECURSE_SUBMODULES_ON;
 332         case 0:
 333                 return RECURSE_SUBMODULES_OFF;
 334         default:
 335                 if (die_on_error)
 336                         die("bad %s argument: %s", opt, arg);
 337                 return RECURSE_SUBMODULES_ERROR;
 338         }
 339 }
 340
 341 int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
 342 {
 343         return parse_update_recurse(opt, arg, 1);
 344 }
 345
 346 static int parse_push_recurse(const char *opt, const char *arg,
 347                                int die_on_error)
 348 {
 349         switch (git_parse_maybe_bool(arg)) {
 350         case 1:
 351                 /* There's no simple "on" value when pushing */
 352                 if (die_on_error)
 353                         die("bad %s argument: %s", opt, arg);
 354                 else
 355                         return RECURSE_SUBMODULES_ERROR;
 356         case 0:
 357                 return RECURSE_SUBMODULES_OFF;
 358         default:
 359                 if (!strcmp(arg, "on-demand"))
 360                         return RECURSE_SUBMODULES_ON_DEMAND;
 361                 else if (!strcmp(arg, "check"))
 362                         return RECURSE_SUBMODULES_CHECK;
 363                 else if (!strcmp(arg, "only"))
 364                         return RECURSE_SUBMODULES_ONLY;
 365                 else if (die_on_error)
 366                         die("bad %s argument: %s", opt, arg);
 367                 else
 368                         return RECURSE_SUBMODULES_ERROR;
 369         }
 370 }
 371
 372 int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
 373 {
 374         return parse_push_recurse(opt, arg, 1);
 375 }
 376
 377 static void warn_multiple_config(const struct object_id *treeish_name,
 378                                  const char *name, const char *option)
 379 {
 380         const char *commit_string = "WORKTREE";
 381         if (treeish_name)
 382                 commit_string = oid_to_hex(treeish_name);
 383         warning("%s:.gitmodules, multiple configurations found for "
 384                         "'submodule.%s.%s'. Skipping second one!",
 385                         commit_string, name, option);
 386 }
 387
 388 struct parse_config_parameter {
 389         struct submodule_cache *cache;
 390         const struct object_id *treeish_name;
 391         const struct object_id *gitmodules_oid;
 392         int overwrite;
 393 };
 394
 395 static int parse_config(const char *var, const char *value, void *data)
 396 {
 397         struct parse_config_parameter *me = data;
 398         struct submodule *submodule;
 399         struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
 400         int ret = 0;
 401
 402         /* this also ensures that we only parse submodule entries */
 403         if (!name_and_item_from_var(var, &name, &item))
 404                 return 0;
 405
 406         submodule = lookup_or_create_by_name(me->cache,
 407                                              me->gitmodules_oid,
 408                                              name.buf);
 409
 410         if (!strcmp(item.buf, "path")) {
 411                 if (!value)
 412                         ret = config_error_nonbool(var);
 413                 else if (!me->overwrite && submodule->path)
 414                         warn_multiple_config(me->treeish_name, submodule->name,
 415                                         "path");
 416                 else {
 417                         if (submodule->path)
 418                                 cache_remove_path(me->cache, submodule);
 419                         free((void *) submodule->path);
 420                         submodule->path = xstrdup(value);
 421                         cache_put_path(me->cache, submodule);
 422                 }
 423         } else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
 424                 /* when parsing worktree configurations we can die early */
 425                 int die_on_error = is_null_oid(me->gitmodules_oid);
 426                 if (!me->overwrite &&
 427                     submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
 428                         warn_multiple_config(me->treeish_name, submodule->name,
 429                                         "fetchrecursesubmodules");
 430                 else
 431                         submodule->fetch_recurse = parse_fetch_recurse(
 432                                                                 var, value,
 433                                                                 die_on_error);
 434         } else if (!strcmp(item.buf, "ignore")) {
 435                 if (!value)
 436                         ret = config_error_nonbool(var);
 437                 else if (!me->overwrite && submodule->ignore)
 438                         warn_multiple_config(me->treeish_name, submodule->name,
 439                                         "ignore");
 440                 else if (strcmp(value, "untracked") &&
 441                          strcmp(value, "dirty") &&
 442                          strcmp(value, "all") &&
 443                          strcmp(value, "none"))
 444                         warning("Invalid parameter '%s' for config option "
 445                                         "'submodule.%s.ignore'", value, name.buf);
 446                 else {
 447                         free((void *) submodule->ignore);
 448                         submodule->ignore = xstrdup(value);
 449                 }
 450         } else if (!strcmp(item.buf, "url")) {
 451                 if (!value) {
 452                         ret = config_error_nonbool(var);
 453                 } else if (!me->overwrite && submodule->url) {
 454                         warn_multiple_config(me->treeish_name, submodule->name,
 455                                         "url");
 456                 } else {
 457                         free((void *) submodule->url);
 458                         submodule->url = xstrdup(value);
 459                 }
 460         } else if (!strcmp(item.buf, "update")) {
 461                 if (!value)
 462                         ret = config_error_nonbool(var);
 463                 else if (!me->overwrite &&
 464                          submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
 465                         warn_multiple_config(me->treeish_name, submodule->name,
 466                                              "update");
 467                 else if (parse_submodule_update_strategy(value,
 468                          &submodule->update_strategy) < 0)
 469                                 die(_("invalid value for %s"), var);
 470         } else if (!strcmp(item.buf, "shallow")) {
 471                 if (!me->overwrite && submodule->recommend_shallow != -1)
 472                         warn_multiple_config(me->treeish_name, submodule->name,
 473                                              "shallow");
 474                 else
 475                         submodule->recommend_shallow =
 476                                 git_config_bool(var, value);
 477         } else if (!strcmp(item.buf, "branch")) {
 478                 if (!me->overwrite && submodule->branch)
 479                         warn_multiple_config(me->treeish_name, submodule->name,
 480                                              "branch");
 481                 else {
 482                         free((void *)submodule->branch);
 483                         submodule->branch = xstrdup(value);
 484                 }
 485         }
 486
 487         strbuf_release(&name);
 488         strbuf_release(&item);
 489
 490         return ret;
 491 }
 492
 493 static int gitmodule_oid_from_commit(const struct object_id *treeish_name,
 494                                      struct object_id *gitmodules_oid,
 495                                      struct strbuf *rev)
 496 {
 497         int ret = 0;
 498
 499         if (is_null_oid(treeish_name)) {
 500                 oidclr(gitmodules_oid);
 501                 return 1;
 502         }
 503
 504         strbuf_addf(rev, "%s:.gitmodules", oid_to_hex(treeish_name));
 505         if (get_oid(rev->buf, gitmodules_oid) >= 0)
 506                 ret = 1;
 507
 508         return ret;
 509 }
 510
 511 /* This does a lookup of a submodule configuration by name or by path
 512  * (key) with on-demand reading of the appropriate .gitmodules from
 513  * revisions.
 514  */
 515 static const struct submodule *config_from(struct submodule_cache *cache,
 516                 const struct object_id *treeish_name, const char *key,
 517                 enum lookup_type lookup_type)
 518 {
 519         struct strbuf rev = STRBUF_INIT;
 520         unsigned long config_size;
 521         char *config = NULL;
 522         struct object_id oid;
 523         enum object_type type;
 524         const struct submodule *submodule = NULL;
 525         struct parse_config_parameter parameter;
 526
 527         /*
 528          * If any parameter except the cache is a NULL pointer just
 529          * return the first submodule. Can be used to check whether
 530          * there are any submodules parsed.
 531          */
 532         if (!treeish_name || !key) {
 533                 struct hashmap_iter iter;
 534                 struct submodule_entry *entry;
 535
 536                 entry = hashmap_iter_first(&cache->for_name, &iter);
 537                 if (!entry)
 538                         return NULL;
 539                 return entry->config;
 540         }
 541
 542         if (!gitmodule_oid_from_commit(treeish_name, &oid, &rev))
 543                 goto out;
 544
 545         switch (lookup_type) {
 546         case lookup_name:
 547                 submodule = cache_lookup_name(cache, &oid, key);
 548                 break;
 549         case lookup_path:
 550                 submodule = cache_lookup_path(cache, &oid, key);
 551                 break;
 552         }
 553         if (submodule)
 554                 goto out;
 555
 556         config = read_object_file(&oid, &type, &config_size);
 557         if (!config || type != OBJ_BLOB)
 558                 goto out;
 559
 560         /* fill the submodule config into the cache */
 561         parameter.cache = cache;
 562         parameter.treeish_name = treeish_name;
 563         parameter.gitmodules_oid = &oid;
 564         parameter.overwrite = 0;
 565         git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
 566                         config, config_size, &parameter, NULL);
 567         strbuf_release(&rev);
 568         free(config);
 569
 570         switch (lookup_type) {
 571         case lookup_name:
 572                 return cache_lookup_name(cache, &oid, key);
 573         case lookup_path:
 574                 return cache_lookup_path(cache, &oid, key);
 575         default:
 576                 return NULL;
 577         }
 578
 579 out:
 580         strbuf_release(&rev);
 581         free(config);
 582         return submodule;
 583 }
 584
 585 static void submodule_cache_check_init(struct repository *repo)
 586 {
 587         if (repo->submodule_cache && repo->submodule_cache->initialized)
 588                 return;
 589
 590         if (!repo->submodule_cache)
 591                 repo->submodule_cache = submodule_cache_alloc();
 592
 593         submodule_cache_init(repo->submodule_cache);
 594 }
 595
 596 /*
 597  * Note: This function is private for a reason, the '.gitmodules' file should
 598  * not be used as as a mechanism to retrieve arbitrary configuration stored in
 599  * the repository.
 600  *
 601  * Runs the provided config function on the '.gitmodules' file found in the
 602  * working directory.
 603  */
 604 static void config_from_gitmodules(config_fn_t fn, struct repository *repo, void *data)
 605 {
 606         if (repo->worktree) {
 607                 struct git_config_source config_source = { 0 };
 608                 const struct config_options opts = { 0 };
 609                 struct object_id oid;
 610                 char *file;
 611
 612                 file = repo_worktree_path(repo, GITMODULES_FILE);
 613                 if (file_exists(file)) {
 614                         config_source.file = file;
 615                 } else if (repo->submodule_prefix) {
 616                         /*
 617                          * When get_oid and config_with_options, used below,
 618                          * become able to work on a specific repository, this
 619                          * warning branch can be removed.
 620                          */
 621                         warning("nested submodules without %s in the working tree are not supported yet",
 622                                 GITMODULES_FILE);
 623                         goto out;
 624                 } else if (get_oid(GITMODULES_INDEX, &oid) >= 0) {
 625                         config_source.blob = GITMODULES_INDEX;
 626                 } else if (get_oid(GITMODULES_HEAD, &oid) >= 0) {
 627                         config_source.blob = GITMODULES_HEAD;
 628                 } else {
 629                         goto out;
 630                 }
 631
 632                 config_with_options(fn, data, &config_source, &opts);
 633
 634 out:
 635                 free(file);
 636         }
 637 }
 638
 639 static int gitmodules_cb(const char *var, const char *value, void *data)
 640 {
 641         struct repository *repo = data;
 642         struct parse_config_parameter parameter;
 643
 644         parameter.cache = repo->submodule_cache;
 645         parameter.treeish_name = NULL;
 646         parameter.gitmodules_oid = &null_oid;
 647         parameter.overwrite = 1;
 648
 649         return parse_config(var, value, &parameter);
 650 }
 651
 652 void repo_read_gitmodules(struct repository *repo)
 653 {
 654         submodule_cache_check_init(repo);
 655
 656         if (repo_read_index(repo) < 0)
 657                 return;
 658
 659         if (!is_gitmodules_unmerged(repo->index))
 660                 config_from_gitmodules(gitmodules_cb, repo, repo);
 661
 662         repo->submodule_cache->gitmodules_read = 1;
 663 }
 664
 665 void gitmodules_config_oid(const struct object_id *commit_oid)
 666 {
 667         struct strbuf rev = STRBUF_INIT;
 668         struct object_id oid;
 669
 670         submodule_cache_check_init(the_repository);
 671
 672         if (gitmodule_oid_from_commit(commit_oid, &oid, &rev)) {
 673                 git_config_from_blob_oid(gitmodules_cb, rev.buf,
 674                                          &oid, the_repository);
 675         }
 676         strbuf_release(&rev);
 677
 678         the_repository->submodule_cache->gitmodules_read = 1;
 679 }
 680
 681 static void gitmodules_read_check(struct repository *repo)
 682 {
 683         submodule_cache_check_init(repo);
 684
 685         /* read the repo's .gitmodules file if it hasn't been already */
 686         if (!repo->submodule_cache->gitmodules_read)
 687                 repo_read_gitmodules(repo);
 688 }
 689
 690 const struct submodule *submodule_from_name(struct repository *r,
 691                                             const struct object_id *treeish_name,
 692                 const char *name)
 693 {
 694         gitmodules_read_check(r);
 695         return config_from(r->submodule_cache, treeish_name, name, lookup_name);
 696 }
 697
 698 const struct submodule *submodule_from_path(struct repository *r,
 699                                             const struct object_id *treeish_name,
 700                 const char *path)
 701 {
 702         gitmodules_read_check(r);
 703         return config_from(r->submodule_cache, treeish_name, path, lookup_path);
 704 }
 705
 706 void submodule_free(struct repository *r)
 707 {
 708         if (r->submodule_cache)
 709                 submodule_cache_clear(r->submodule_cache);
 710 }
 711
 712 static int config_print_callback(const char *var, const char *value, void *cb_data)
 713 {
 714         char *wanted_key = cb_data;
 715
 716         if (!strcmp(wanted_key, var))
 717                 printf("%s\n", value);
 718
 719         return 0;
 720 }
 721
 722 int print_config_from_gitmodules(struct repository *repo, const char *key)
 723 {
 724         int ret;
 725         char *store_key;
 726
 727         ret = git_config_parse_key(key, &store_key, NULL);
 728         if (ret < 0)
 729                 return CONFIG_INVALID_KEY;
 730
 731         config_from_gitmodules(config_print_callback, repo, store_key);
 732
 733         free(store_key);
 734         return 0;
 735 }
 736
 737 int config_set_in_gitmodules_file_gently(const char *key, const char *value)
 738 {
 739         int ret;
 740
 741         ret = git_config_set_in_file_gently(GITMODULES_FILE, key, value);
 742         if (ret < 0)
 743                 /* Maybe the user already did that, don't error out here */
 744                 warning(_("Could not update .gitmodules entry %s"), key);
 745
 746         return ret;
 747 }
 748
 749 struct fetch_config {
 750         int *max_children;
 751         int *recurse_submodules;
 752 };
 753
 754 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
 755 {
 756         struct fetch_config *config = cb;
 757         if (!strcmp(var, "submodule.fetchjobs")) {
 758                 *(config->max_children) = parse_submodule_fetchjobs(var, value);
 759                 return 0;
 760         } else if (!strcmp(var, "fetch.recursesubmodules")) {
 761                 *(config->recurse_submodules) = parse_fetch_recurse_submodules_arg(var, value);
 762                 return 0;
 763         }
 764
 765         return 0;
 766 }
 767
 768 void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules)
 769 {
 770         struct fetch_config config = {
 771                 .max_children = max_children,
 772                 .recurse_submodules = recurse_submodules
 773         };
 774         config_from_gitmodules(gitmodules_fetch_config, the_repository, &config);
 775 }
 776
 777 static int gitmodules_update_clone_config(const char *var, const char *value,
 778                                           void *cb)
 779 {
 780         int *max_jobs = cb;
 781         if (!strcmp(var, "submodule.fetchjobs"))
 782                 *max_jobs = parse_submodule_fetchjobs(var, value);
 783         return 0;
 784 }
 785
 786 void update_clone_config_from_gitmodules(int *max_jobs)
 787 {
 788         config_from_gitmodules(gitmodules_update_clone_config, the_repository, &max_jobs);
 789 }