submodule-config.c

   1 #include "cache.h"
   2 #include "dir.h"
   3 #include "repository.h"
   4 #include "config.h"
   5 #include "submodule-config.h"
   6 #include "submodule.h"
   7 #include "strbuf.h"
   8 #include "object-store.h"
   9 #include "parse-options.h"
  10
  11 /*
  12  * submodule cache lookup structure
  13  * There is one shared set of 'struct submodule' entries which can be
  14  * looked up by their sha1 blob id of the .gitmodules file and either
  15  * using path or name as key.
  16  * for_path stores submodule entries with path as key
  17  * for_name stores submodule entries with name as key
  18  */
  19 struct submodule_cache {
  20         struct hashmap for_path;
  21         struct hashmap for_name;
  22         unsigned initialized:1;
  23         unsigned gitmodules_read:1;
  24 };
  25
  26 /*
  27  * thin wrapper struct needed to insert 'struct submodule' entries to
  28  * the hashmap
  29  */
  30 struct submodule_entry {
  31         struct hashmap_entry ent;
  32         struct submodule *config;
  33 };
  34
  35 enum lookup_type {
  36         lookup_name,
  37         lookup_path
  38 };
  39
  40 static int config_path_cmp(const void *unused_cmp_data,
  41                            const struct hashmap_entry *eptr,
  42                            const struct hashmap_entry *entry_or_key,
  43                            const void *unused_keydata)
  44 {
  45         const struct submodule_entry *a, *b;
  46
  47         a = container_of(eptr, const struct submodule_entry, ent);
  48         b = container_of(entry_or_key, const struct submodule_entry, ent);
  49
  50         return strcmp(a->config->path, b->config->path) ||
  51                !oideq(&a->config->gitmodules_oid, &b->config->gitmodules_oid);
  52 }
  53
  54 static int config_name_cmp(const void *unused_cmp_data,
  55                            const struct hashmap_entry *eptr,
  56                            const struct hashmap_entry *entry_or_key,
  57                            const void *unused_keydata)
  58 {
  59         const struct submodule_entry *a, *b;
  60
  61         a = container_of(eptr, const struct submodule_entry, ent);
  62         b = container_of(entry_or_key, const struct submodule_entry, ent);
  63
  64         return strcmp(a->config->name, b->config->name) ||
  65                !oideq(&a->config->gitmodules_oid, &b->config->gitmodules_oid);
  66 }
  67
  68 static struct submodule_cache *submodule_cache_alloc(void)
  69 {
  70         return xcalloc(1, sizeof(struct submodule_cache));
  71 }
  72
  73 static void submodule_cache_init(struct submodule_cache *cache)
  74 {
  75         hashmap_init(&cache->for_path, config_path_cmp, NULL, 0);
  76         hashmap_init(&cache->for_name, config_name_cmp, NULL, 0);
  77         cache->initialized = 1;
  78 }
  79
  80 static void free_one_config(struct submodule_entry *entry)
  81 {
  82         free((void *) entry->config->path);
  83         free((void *) entry->config->name);
  84         free((void *) entry->config->branch);
  85         free((void *) entry->config->update_strategy.command);
  86         free(entry->config);
  87 }
  88
  89 static void submodule_cache_clear(struct submodule_cache *cache)
  90 {
  91         struct hashmap_iter iter;
  92         struct submodule_entry *entry;
  93
  94         if (!cache->initialized)
  95                 return;
  96
  97         /*
  98          * We iterate over the name hash here to be symmetric with the
  99          * allocation of struct submodule entries. Each is allocated by
 100          * their .gitmodules blob sha1 and submodule name.
 101          */
 102         hashmap_for_each_entry(&cache->for_name, &iter, entry,
 103                                 ent /* member name */)
 104                 free_one_config(entry);
 105
 106         hashmap_clear_and_free(&cache->for_path, struct submodule_entry, ent);
 107         hashmap_clear_and_free(&cache->for_name, struct submodule_entry, ent);
 108         cache->initialized = 0;
 109         cache->gitmodules_read = 0;
 110 }
 111
 112 void submodule_cache_free(struct submodule_cache *cache)
 113 {
 114         submodule_cache_clear(cache);
 115         free(cache);
 116 }
 117
 118 static unsigned int hash_oid_string(const struct object_id *oid,
 119                                     const char *string)
 120 {
 121         return memhash(oid->hash, the_hash_algo->rawsz) + strhash(string);
 122 }
 123
 124 static void cache_put_path(struct submodule_cache *cache,
 125                            struct submodule *submodule)
 126 {
 127         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 128                                             submodule->path);
 129         struct submodule_entry *e = xmalloc(sizeof(*e));
 130         hashmap_entry_init(&e->ent, hash);
 131         e->config = submodule;
 132         hashmap_put(&cache->for_path, &e->ent);
 133 }
 134
 135 static void cache_remove_path(struct submodule_cache *cache,
 136                               struct submodule *submodule)
 137 {
 138         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 139                                             submodule->path);
 140         struct submodule_entry e;
 141         struct submodule_entry *removed;
 142         hashmap_entry_init(&e.ent, hash);
 143         e.config = submodule;
 144         removed = hashmap_remove_entry(&cache->for_path, &e, ent, NULL);
 145         free(removed);
 146 }
 147
 148 static void cache_add(struct submodule_cache *cache,
 149                       struct submodule *submodule)
 150 {
 151         unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
 152                                             submodule->name);
 153         struct submodule_entry *e = xmalloc(sizeof(*e));
 154         hashmap_entry_init(&e->ent, hash);
 155         e->config = submodule;
 156         hashmap_add(&cache->for_name, &e->ent);
 157 }
 158
 159 static const struct submodule *cache_lookup_path(struct submodule_cache *cache,
 160                 const struct object_id *gitmodules_oid, const char *path)
 161 {
 162         struct submodule_entry *entry;
 163         unsigned int hash = hash_oid_string(gitmodules_oid, path);
 164         struct submodule_entry key;
 165         struct submodule key_config;
 166
 167         oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
 168         key_config.path = path;
 169
 170         hashmap_entry_init(&key.ent, hash);
 171         key.config = &key_config;
 172
 173         entry = hashmap_get_entry(&cache->for_path, &key, ent, NULL);
 174         if (entry)
 175                 return entry->config;
 176         return NULL;
 177 }
 178
 179 static struct submodule *cache_lookup_name(struct submodule_cache *cache,
 180                 const struct object_id *gitmodules_oid, const char *name)
 181 {
 182         struct submodule_entry *entry;
 183         unsigned int hash = hash_oid_string(gitmodules_oid, name);
 184         struct submodule_entry key;
 185         struct submodule key_config;
 186
 187         oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
 188         key_config.name = name;
 189
 190         hashmap_entry_init(&key.ent, hash);
 191         key.config = &key_config;
 192
 193         entry = hashmap_get_entry(&cache->for_name, &key, ent, NULL);
 194         if (entry)
 195                 return entry->config;
 196         return NULL;
 197 }
 198
 199 int check_submodule_name(const char *name)
 200 {
 201         /* Disallow empty names */
 202         if (!*name)
 203                 return -1;
 204
 205         /*
 206          * Look for '..' as a path component. Check both '/' and '\\' as
 207          * separators rather than is_dir_sep(), because we want the name rules
 208          * to be consistent across platforms.
 209          */
 210         goto in_component; /* always start inside component */
 211         while (*name) {
 212                 char c = *name++;
 213                 if (c == '/' || c == '\\') {
 214 in_component:
 215                         if (name[0] == '.' && name[1] == '.' &&
 216                             (!name[2] || name[2] == '/' || name[2] == '\\'))
 217                                 return -1;
 218                 }
 219         }
 220
 221         return 0;
 222 }
 223
 224 static int name_and_item_from_var(const char *var, struct strbuf *name,
 225                                   struct strbuf *item)
 226 {
 227         const char *subsection, *key;
 228         size_t subsection_len;
 229         int parse;
 230         parse = parse_config_key(var, "submodule", &subsection,
 231                         &subsection_len, &key);
 232         if (parse < 0 || !subsection)
 233                 return 0;
 234
 235         strbuf_add(name, subsection, subsection_len);
 236         if (check_submodule_name(name->buf) < 0) {
 237                 warning(_("ignoring suspicious submodule name: %s"), name->buf);
 238                 strbuf_release(name);
 239                 return 0;
 240         }
 241
 242         strbuf_addstr(item, key);
 243
 244         return 1;
 245 }
 246
 247 static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
 248                 const struct object_id *gitmodules_oid, const char *name)
 249 {
 250         struct submodule *submodule;
 251         struct strbuf name_buf = STRBUF_INIT;
 252
 253         submodule = cache_lookup_name(cache, gitmodules_oid, name);
 254         if (submodule)
 255                 return submodule;
 256
 257         submodule = xmalloc(sizeof(*submodule));
 258
 259         strbuf_addstr(&name_buf, name);
 260         submodule->name = strbuf_detach(&name_buf, NULL);
 261
 262         submodule->path = NULL;
 263         submodule->url = NULL;
 264         submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
 265         submodule->update_strategy.command = NULL;
 266         submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
 267         submodule->ignore = NULL;
 268         submodule->branch = NULL;
 269         submodule->recommend_shallow = -1;
 270
 271         oidcpy(&submodule->gitmodules_oid, gitmodules_oid);
 272
 273         cache_add(cache, submodule);
 274
 275         return submodule;
 276 }
 277
 278 static int parse_fetch_recurse(const char *opt, const char *arg,
 279                                int die_on_error)
 280 {
 281         switch (git_parse_maybe_bool(arg)) {
 282         case 1:
 283                 return RECURSE_SUBMODULES_ON;
 284         case 0:
 285                 return RECURSE_SUBMODULES_OFF;
 286         default:
 287                 if (!strcmp(arg, "on-demand"))
 288                         return RECURSE_SUBMODULES_ON_DEMAND;
 289                 /*
 290                  * Please update $__git_fetch_recurse_submodules in
 291                  * git-completion.bash when you add new options.
 292                  */
 293                 if (die_on_error)
 294                         die("bad %s argument: %s", opt, arg);
 295                 else
 296                         return RECURSE_SUBMODULES_ERROR;
 297         }
 298 }
 299
 300 int parse_submodule_fetchjobs(const char *var, const char *value)
 301 {
 302         int fetchjobs = git_config_int(var, value);
 303         if (fetchjobs < 0)
 304                 die(_("negative values not allowed for submodule.fetchjobs"));
 305         return fetchjobs;
 306 }
 307
 308 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
 309 {
 310         return parse_fetch_recurse(opt, arg, 1);
 311 }
 312
 313 int option_fetch_parse_recurse_submodules(const struct option *opt,
 314                                           const char *arg, int unset)
 315 {
 316         int *v;
 317
 318         if (!opt->value)
 319                 return -1;
 320
 321         v = opt->value;
 322
 323         if (unset) {
 324                 *v = RECURSE_SUBMODULES_OFF;
 325         } else {
 326                 if (arg)
 327                         *v = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
 328                 else
 329                         *v = RECURSE_SUBMODULES_ON;
 330         }
 331         return 0;
 332 }
 333
 334 static int parse_update_recurse(const char *opt, const char *arg,
 335                                 int die_on_error)
 336 {
 337         switch (git_parse_maybe_bool(arg)) {
 338         case 1:
 339                 return RECURSE_SUBMODULES_ON;
 340         case 0:
 341                 return RECURSE_SUBMODULES_OFF;
 342         default:
 343                 if (die_on_error)
 344                         die("bad %s argument: %s", opt, arg);
 345                 return RECURSE_SUBMODULES_ERROR;
 346         }
 347 }
 348
 349 int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
 350 {
 351         return parse_update_recurse(opt, arg, 1);
 352 }
 353
 354 static int parse_push_recurse(const char *opt, const char *arg,
 355                                int die_on_error)
 356 {
 357         switch (git_parse_maybe_bool(arg)) {
 358         case 1:
 359                 /* There's no simple "on" value when pushing */
 360                 if (die_on_error)
 361                         die("bad %s argument: %s", opt, arg);
 362                 else
 363                         return RECURSE_SUBMODULES_ERROR;
 364         case 0:
 365                 return RECURSE_SUBMODULES_OFF;
 366         default:
 367                 if (!strcmp(arg, "on-demand"))
 368                         return RECURSE_SUBMODULES_ON_DEMAND;
 369                 else if (!strcmp(arg, "check"))
 370                         return RECURSE_SUBMODULES_CHECK;
 371                 else if (!strcmp(arg, "only"))
 372                         return RECURSE_SUBMODULES_ONLY;
 373                 /*
 374                  * Please update $__git_push_recurse_submodules in
 375                  * git-completion.bash when you add new modes.
 376                  */
 377                 else if (die_on_error)
 378                         die("bad %s argument: %s", opt, arg);
 379                 else
 380                         return RECURSE_SUBMODULES_ERROR;
 381         }
 382 }
 383
 384 int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
 385 {
 386         return parse_push_recurse(opt, arg, 1);
 387 }
 388
 389 static void warn_multiple_config(const struct object_id *treeish_name,
 390                                  const char *name, const char *option)
 391 {
 392         const char *commit_string = "WORKTREE";
 393         if (treeish_name)
 394                 commit_string = oid_to_hex(treeish_name);
 395         warning("%s:.gitmodules, multiple configurations found for "
 396                         "'submodule.%s.%s'. Skipping second one!",
 397                         commit_string, name, option);
 398 }
 399
 400 static void warn_command_line_option(const char *var, const char *value)
 401 {
 402         warning(_("ignoring '%s' which may be interpreted as"
 403                   " a command-line option: %s"), var, value);
 404 }
 405
 406 struct parse_config_parameter {
 407         struct submodule_cache *cache;
 408         const struct object_id *treeish_name;
 409         const struct object_id *gitmodules_oid;
 410         int overwrite;
 411 };
 412
 413 /*
 414  * Parse a config item from .gitmodules.
 415  *
 416  * This does not handle submodule-related configuration from the main
 417  * config store (.git/config, etc).  Callers are responsible for
 418  * checking for overrides in the main config store when appropriate.
 419  */
 420 static int parse_config(const char *var, const char *value, void *data)
 421 {
 422         struct parse_config_parameter *me = data;
 423         struct submodule *submodule;
 424         struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
 425         int ret = 0;
 426
 427         /* this also ensures that we only parse submodule entries */
 428         if (!name_and_item_from_var(var, &name, &item))
 429                 return 0;
 430
 431         submodule = lookup_or_create_by_name(me->cache,
 432                                              me->gitmodules_oid,
 433                                              name.buf);
 434
 435         if (!strcmp(item.buf, "path")) {
 436                 if (!value)
 437                         ret = config_error_nonbool(var);
 438                 else if (looks_like_command_line_option(value))
 439                         warn_command_line_option(var, value);
 440                 else if (!me->overwrite && submodule->path)
 441                         warn_multiple_config(me->treeish_name, submodule->name,
 442                                         "path");
 443                 else {
 444                         if (submodule->path)
 445                                 cache_remove_path(me->cache, submodule);
 446                         free((void *) submodule->path);
 447                         submodule->path = xstrdup(value);
 448                         cache_put_path(me->cache, submodule);
 449                 }
 450         } else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
 451                 /* when parsing worktree configurations we can die early */
 452                 int die_on_error = is_null_oid(me->gitmodules_oid);
 453                 if (!me->overwrite &&
 454                     submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
 455                         warn_multiple_config(me->treeish_name, submodule->name,
 456                                         "fetchrecursesubmodules");
 457                 else
 458                         submodule->fetch_recurse = parse_fetch_recurse(
 459                                                                 var, value,
 460                                                                 die_on_error);
 461         } else if (!strcmp(item.buf, "ignore")) {
 462                 if (!value)
 463                         ret = config_error_nonbool(var);
 464                 else if (!me->overwrite && submodule->ignore)
 465                         warn_multiple_config(me->treeish_name, submodule->name,
 466                                         "ignore");
 467                 else if (strcmp(value, "untracked") &&
 468                          strcmp(value, "dirty") &&
 469                          strcmp(value, "all") &&
 470                          strcmp(value, "none"))
 471                         warning("Invalid parameter '%s' for config option "
 472                                         "'submodule.%s.ignore'", value, name.buf);
 473                 else {
 474                         free((void *) submodule->ignore);
 475                         submodule->ignore = xstrdup(value);
 476                 }
 477         } else if (!strcmp(item.buf, "url")) {
 478                 if (!value) {
 479                         ret = config_error_nonbool(var);
 480                 } else if (looks_like_command_line_option(value)) {
 481                         warn_command_line_option(var, value);
 482                 } else if (!me->overwrite && submodule->url) {
 483                         warn_multiple_config(me->treeish_name, submodule->name,
 484                                         "url");
 485                 } else {
 486                         free((void *) submodule->url);
 487                         submodule->url = xstrdup(value);
 488                 }
 489         } else if (!strcmp(item.buf, "update")) {
 490                 if (!value)
 491                         ret = config_error_nonbool(var);
 492                 else if (!me->overwrite &&
 493                          submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
 494                         warn_multiple_config(me->treeish_name, submodule->name,
 495                                              "update");
 496                 else if (parse_submodule_update_strategy(value,
 497                          &submodule->update_strategy) < 0 ||
 498                          submodule->update_strategy.type == SM_UPDATE_COMMAND)
 499                         die(_("invalid value for %s"), var);
 500         } else if (!strcmp(item.buf, "shallow")) {
 501                 if (!me->overwrite && submodule->recommend_shallow != -1)
 502                         warn_multiple_config(me->treeish_name, submodule->name,
 503                                              "shallow");
 504                 else
 505                         submodule->recommend_shallow =
 506                                 git_config_bool(var, value);
 507         } else if (!strcmp(item.buf, "branch")) {
 508                 if (!me->overwrite && submodule->branch)
 509                         warn_multiple_config(me->treeish_name, submodule->name,
 510                                              "branch");
 511                 else {
 512                         free((void *)submodule->branch);
 513                         submodule->branch = xstrdup(value);
 514                 }
 515         }
 516
 517         strbuf_release(&name);
 518         strbuf_release(&item);
 519
 520         return ret;
 521 }
 522
 523 static int gitmodule_oid_from_commit(const struct object_id *treeish_name,
 524                                      struct object_id *gitmodules_oid,
 525                                      struct strbuf *rev)
 526 {
 527         int ret = 0;
 528
 529         if (is_null_oid(treeish_name)) {
 530                 oidclr(gitmodules_oid);
 531                 return 1;
 532         }
 533
 534         strbuf_addf(rev, "%s:.gitmodules", oid_to_hex(treeish_name));
 535         if (get_oid(rev->buf, gitmodules_oid) >= 0)
 536                 ret = 1;
 537
 538         return ret;
 539 }
 540
 541 /* This does a lookup of a submodule configuration by name or by path
 542  * (key) with on-demand reading of the appropriate .gitmodules from
 543  * revisions.
 544  */
 545 static const struct submodule *config_from(struct submodule_cache *cache,
 546                 const struct object_id *treeish_name, const char *key,
 547                 enum lookup_type lookup_type)
 548 {
 549         struct strbuf rev = STRBUF_INIT;
 550         unsigned long config_size;
 551         char *config = NULL;
 552         struct object_id oid;
 553         enum object_type type;
 554         const struct submodule *submodule = NULL;
 555         struct parse_config_parameter parameter;
 556
 557         /*
 558          * If any parameter except the cache is a NULL pointer just
 559          * return the first submodule. Can be used to check whether
 560          * there are any submodules parsed.
 561          */
 562         if (!treeish_name || !key) {
 563                 struct hashmap_iter iter;
 564                 struct submodule_entry *entry;
 565
 566                 entry = hashmap_iter_first_entry(&cache->for_name, &iter,
 567                                                 struct submodule_entry,
 568                                                 ent /* member name */);
 569                 if (!entry)
 570                         return NULL;
 571                 return entry->config;
 572         }
 573
 574         if (!gitmodule_oid_from_commit(treeish_name, &oid, &rev))
 575                 goto out;
 576
 577         switch (lookup_type) {
 578         case lookup_name:
 579                 submodule = cache_lookup_name(cache, &oid, key);
 580                 break;
 581         case lookup_path:
 582                 submodule = cache_lookup_path(cache, &oid, key);
 583                 break;
 584         }
 585         if (submodule)
 586                 goto out;
 587
 588         config = read_object_file(&oid, &type, &config_size);
 589         if (!config || type != OBJ_BLOB)
 590                 goto out;
 591
 592         /* fill the submodule config into the cache */
 593         parameter.cache = cache;
 594         parameter.treeish_name = treeish_name;
 595         parameter.gitmodules_oid = &oid;
 596         parameter.overwrite = 0;
 597         git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
 598                         config, config_size, &parameter, NULL);
 599         strbuf_release(&rev);
 600         free(config);
 601
 602         switch (lookup_type) {
 603         case lookup_name:
 604                 return cache_lookup_name(cache, &oid, key);
 605         case lookup_path:
 606                 return cache_lookup_path(cache, &oid, key);
 607         default:
 608                 return NULL;
 609         }
 610
 611 out:
 612         strbuf_release(&rev);
 613         free(config);
 614         return submodule;
 615 }
 616
 617 static void submodule_cache_check_init(struct repository *repo)
 618 {
 619         if (repo->submodule_cache && repo->submodule_cache->initialized)
 620                 return;
 621
 622         if (!repo->submodule_cache)
 623                 repo->submodule_cache = submodule_cache_alloc();
 624
 625         submodule_cache_init(repo->submodule_cache);
 626 }
 627
 628 /*
 629  * Note: This function is private for a reason, the '.gitmodules' file should
 630  * not be used as a mechanism to retrieve arbitrary configuration stored in
 631  * the repository.
 632  *
 633  * Runs the provided config function on the '.gitmodules' file found in the
 634  * working directory.
 635  */
 636 static void config_from_gitmodules(config_fn_t fn, struct repository *repo, void *data)
 637 {
 638         if (repo->worktree) {
 639                 struct git_config_source config_source = {
 640                         0, .scope = CONFIG_SCOPE_SUBMODULE
 641                 };
 642                 const struct config_options opts = { 0 };
 643                 struct object_id oid;
 644                 char *file;
 645                 char *oidstr = NULL;
 646
 647                 file = repo_worktree_path(repo, GITMODULES_FILE);
 648                 if (file_exists(file)) {
 649                         config_source.file = file;
 650                 } else if (repo_get_oid(repo, GITMODULES_INDEX, &oid) >= 0 ||
 651                            repo_get_oid(repo, GITMODULES_HEAD, &oid) >= 0) {
 652                         config_source.blob = oidstr = xstrdup(oid_to_hex(&oid));
 653                         if (repo != the_repository)
 654                                 add_to_alternates_memory(repo->objects->odb->path);
 655                 } else {
 656                         goto out;
 657                 }
 658
 659                 config_with_options(fn, data, &config_source, &opts);
 660
 661 out:
 662                 free(oidstr);
 663                 free(file);
 664         }
 665 }
 666
 667 static int gitmodules_cb(const char *var, const char *value, void *data)
 668 {
 669         struct repository *repo = data;
 670         struct parse_config_parameter parameter;
 671
 672         parameter.cache = repo->submodule_cache;
 673         parameter.treeish_name = NULL;
 674         parameter.gitmodules_oid = &null_oid;
 675         parameter.overwrite = 1;
 676
 677         return parse_config(var, value, &parameter);
 678 }
 679
 680 void repo_read_gitmodules(struct repository *repo, int skip_if_read)
 681 {
 682         submodule_cache_check_init(repo);
 683
 684         if (repo->submodule_cache->gitmodules_read && skip_if_read)
 685                 return;
 686
 687         if (repo_read_index(repo) < 0)
 688                 return;
 689
 690         if (!is_gitmodules_unmerged(repo->index))
 691                 config_from_gitmodules(gitmodules_cb, repo, repo);
 692
 693         repo->submodule_cache->gitmodules_read = 1;
 694 }
 695
 696 void gitmodules_config_oid(const struct object_id *commit_oid)
 697 {
 698         struct strbuf rev = STRBUF_INIT;
 699         struct object_id oid;
 700
 701         submodule_cache_check_init(the_repository);
 702
 703         if (gitmodule_oid_from_commit(commit_oid, &oid, &rev)) {
 704                 git_config_from_blob_oid(gitmodules_cb, rev.buf,
 705                                          &oid, the_repository);
 706         }
 707         strbuf_release(&rev);
 708
 709         the_repository->submodule_cache->gitmodules_read = 1;
 710 }
 711
 712 const struct submodule *submodule_from_name(struct repository *r,
 713                                             const struct object_id *treeish_name,
 714                 const char *name)
 715 {
 716         repo_read_gitmodules(r, 1);
 717         return config_from(r->submodule_cache, treeish_name, name, lookup_name);
 718 }
 719
 720 const struct submodule *submodule_from_path(struct repository *r,
 721                                             const struct object_id *treeish_name,
 722                 const char *path)
 723 {
 724         repo_read_gitmodules(r, 1);
 725         return config_from(r->submodule_cache, treeish_name, path, lookup_path);
 726 }
 727
 728 void submodule_free(struct repository *r)
 729 {
 730         if (r->submodule_cache)
 731                 submodule_cache_clear(r->submodule_cache);
 732 }
 733
 734 static int config_print_callback(const char *var, const char *value, void *cb_data)
 735 {
 736         char *wanted_key = cb_data;
 737
 738         if (!strcmp(wanted_key, var))
 739                 printf("%s\n", value);
 740
 741         return 0;
 742 }
 743
 744 int print_config_from_gitmodules(struct repository *repo, const char *key)
 745 {
 746         int ret;
 747         char *store_key;
 748
 749         ret = git_config_parse_key(key, &store_key, NULL);
 750         if (ret < 0)
 751                 return CONFIG_INVALID_KEY;
 752
 753         config_from_gitmodules(config_print_callback, repo, store_key);
 754
 755         free(store_key);
 756         return 0;
 757 }
 758
 759 int config_set_in_gitmodules_file_gently(const char *key, const char *value)
 760 {
 761         int ret;
 762
 763         ret = git_config_set_in_file_gently(GITMODULES_FILE, key, value);
 764         if (ret < 0)
 765                 /* Maybe the user already did that, don't error out here */
 766                 warning(_("Could not update .gitmodules entry %s"), key);
 767
 768         return ret;
 769 }
 770
 771 struct fetch_config {
 772         int *max_children;
 773         int *recurse_submodules;
 774 };
 775
 776 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
 777 {
 778         struct fetch_config *config = cb;
 779         if (!strcmp(var, "submodule.fetchjobs")) {
 780                 if (config->max_children)
 781                         *(config->max_children) =
 782                                 parse_submodule_fetchjobs(var, value);
 783                 return 0;
 784         } else if (!strcmp(var, "fetch.recursesubmodules")) {
 785                 if (config->recurse_submodules)
 786                         *(config->recurse_submodules) =
 787                                 parse_fetch_recurse_submodules_arg(var, value);
 788                 return 0;
 789         }
 790
 791         return 0;
 792 }
 793
 794 void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules)
 795 {
 796         struct fetch_config config = {
 797                 .max_children = max_children,
 798                 .recurse_submodules = recurse_submodules
 799         };
 800         config_from_gitmodules(gitmodules_fetch_config, the_repository, &config);
 801 }
 802
 803 static int gitmodules_update_clone_config(const char *var, const char *value,
 804                                           void *cb)
 805 {
 806         int *max_jobs = cb;
 807         if (!strcmp(var, "submodule.fetchjobs"))
 808                 *max_jobs = parse_submodule_fetchjobs(var, value);
 809         return 0;
 810 }
 811
 812 void update_clone_config_from_gitmodules(int *max_jobs)
 813 {
 814         config_from_gitmodules(gitmodules_update_clone_config, the_repository, &max_jobs);
 815 }