completion: support "git fetch --multiple"
[git.git] / submodule-config.c
blobe04ba756d954e03f4c94785f260c2ac9af6a6f9b
1 #include "cache.h"
2 #include "repository.h"
3 #include "config.h"
4 #include "submodule-config.h"
5 #include "submodule.h"
6 #include "strbuf.h"
7 #include "object-store.h"
8 #include "parse-options.h"
11 * submodule cache lookup structure
12 * There is one shared set of 'struct submodule' entries which can be
13 * looked up by their sha1 blob id of the .gitmodules file and either
14 * using path or name as key.
15 * for_path stores submodule entries with path as key
16 * for_name stores submodule entries with name as key
18 struct submodule_cache {
19 struct hashmap for_path;
20 struct hashmap for_name;
21 unsigned initialized:1;
22 unsigned gitmodules_read:1;
26 * thin wrapper struct needed to insert 'struct submodule' entries to
27 * the hashmap
29 struct submodule_entry {
30 struct hashmap_entry ent;
31 struct submodule *config;
34 enum lookup_type {
35 lookup_name,
36 lookup_path
39 static int config_path_cmp(const void *unused_cmp_data,
40 const void *entry,
41 const void *entry_or_key,
42 const void *unused_keydata)
44 const struct submodule_entry *a = entry;
45 const struct submodule_entry *b = entry_or_key;
47 return strcmp(a->config->path, b->config->path) ||
48 !oideq(&a->config->gitmodules_oid, &b->config->gitmodules_oid);
51 static int config_name_cmp(const void *unused_cmp_data,
52 const void *entry,
53 const void *entry_or_key,
54 const void *unused_keydata)
56 const struct submodule_entry *a = entry;
57 const struct submodule_entry *b = entry_or_key;
59 return strcmp(a->config->name, b->config->name) ||
60 !oideq(&a->config->gitmodules_oid, &b->config->gitmodules_oid);
63 static struct submodule_cache *submodule_cache_alloc(void)
65 return xcalloc(1, sizeof(struct submodule_cache));
68 static void submodule_cache_init(struct submodule_cache *cache)
70 hashmap_init(&cache->for_path, config_path_cmp, NULL, 0);
71 hashmap_init(&cache->for_name, config_name_cmp, NULL, 0);
72 cache->initialized = 1;
75 static void free_one_config(struct submodule_entry *entry)
77 free((void *) entry->config->path);
78 free((void *) entry->config->name);
79 free((void *) entry->config->branch);
80 free((void *) entry->config->update_strategy.command);
81 free(entry->config);
84 static void submodule_cache_clear(struct submodule_cache *cache)
86 struct hashmap_iter iter;
87 struct submodule_entry *entry;
89 if (!cache->initialized)
90 return;
93 * We iterate over the name hash here to be symmetric with the
94 * allocation of struct submodule entries. Each is allocated by
95 * their .gitmodules blob sha1 and submodule name.
97 hashmap_iter_init(&cache->for_name, &iter);
98 while ((entry = hashmap_iter_next(&iter)))
99 free_one_config(entry);
101 hashmap_free(&cache->for_path, 1);
102 hashmap_free(&cache->for_name, 1);
103 cache->initialized = 0;
104 cache->gitmodules_read = 0;
107 void submodule_cache_free(struct submodule_cache *cache)
109 submodule_cache_clear(cache);
110 free(cache);
113 static unsigned int hash_oid_string(const struct object_id *oid,
114 const char *string)
116 return memhash(oid->hash, the_hash_algo->rawsz) + strhash(string);
119 static void cache_put_path(struct submodule_cache *cache,
120 struct submodule *submodule)
122 unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
123 submodule->path);
124 struct submodule_entry *e = xmalloc(sizeof(*e));
125 hashmap_entry_init(e, hash);
126 e->config = submodule;
127 hashmap_put(&cache->for_path, e);
130 static void cache_remove_path(struct submodule_cache *cache,
131 struct submodule *submodule)
133 unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
134 submodule->path);
135 struct submodule_entry e;
136 struct submodule_entry *removed;
137 hashmap_entry_init(&e, hash);
138 e.config = submodule;
139 removed = hashmap_remove(&cache->for_path, &e, NULL);
140 free(removed);
143 static void cache_add(struct submodule_cache *cache,
144 struct submodule *submodule)
146 unsigned int hash = hash_oid_string(&submodule->gitmodules_oid,
147 submodule->name);
148 struct submodule_entry *e = xmalloc(sizeof(*e));
149 hashmap_entry_init(e, hash);
150 e->config = submodule;
151 hashmap_add(&cache->for_name, e);
154 static const struct submodule *cache_lookup_path(struct submodule_cache *cache,
155 const struct object_id *gitmodules_oid, const char *path)
157 struct submodule_entry *entry;
158 unsigned int hash = hash_oid_string(gitmodules_oid, path);
159 struct submodule_entry key;
160 struct submodule key_config;
162 oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
163 key_config.path = path;
165 hashmap_entry_init(&key, hash);
166 key.config = &key_config;
168 entry = hashmap_get(&cache->for_path, &key, NULL);
169 if (entry)
170 return entry->config;
171 return NULL;
174 static struct submodule *cache_lookup_name(struct submodule_cache *cache,
175 const struct object_id *gitmodules_oid, const char *name)
177 struct submodule_entry *entry;
178 unsigned int hash = hash_oid_string(gitmodules_oid, name);
179 struct submodule_entry key;
180 struct submodule key_config;
182 oidcpy(&key_config.gitmodules_oid, gitmodules_oid);
183 key_config.name = name;
185 hashmap_entry_init(&key, hash);
186 key.config = &key_config;
188 entry = hashmap_get(&cache->for_name, &key, NULL);
189 if (entry)
190 return entry->config;
191 return NULL;
194 int check_submodule_name(const char *name)
196 /* Disallow empty names */
197 if (!*name)
198 return -1;
201 * Look for '..' as a path component. Check both '/' and '\\' as
202 * separators rather than is_dir_sep(), because we want the name rules
203 * to be consistent across platforms.
205 goto in_component; /* always start inside component */
206 while (*name) {
207 char c = *name++;
208 if (c == '/' || c == '\\') {
209 in_component:
210 if (name[0] == '.' && name[1] == '.' &&
211 (!name[2] || name[2] == '/' || name[2] == '\\'))
212 return -1;
216 return 0;
219 static int name_and_item_from_var(const char *var, struct strbuf *name,
220 struct strbuf *item)
222 const char *subsection, *key;
223 int subsection_len, parse;
224 parse = parse_config_key(var, "submodule", &subsection,
225 &subsection_len, &key);
226 if (parse < 0 || !subsection)
227 return 0;
229 strbuf_add(name, subsection, subsection_len);
230 if (check_submodule_name(name->buf) < 0) {
231 warning(_("ignoring suspicious submodule name: %s"), name->buf);
232 strbuf_release(name);
233 return 0;
236 strbuf_addstr(item, key);
238 return 1;
241 static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
242 const struct object_id *gitmodules_oid, const char *name)
244 struct submodule *submodule;
245 struct strbuf name_buf = STRBUF_INIT;
247 submodule = cache_lookup_name(cache, gitmodules_oid, name);
248 if (submodule)
249 return submodule;
251 submodule = xmalloc(sizeof(*submodule));
253 strbuf_addstr(&name_buf, name);
254 submodule->name = strbuf_detach(&name_buf, NULL);
256 submodule->path = NULL;
257 submodule->url = NULL;
258 submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
259 submodule->update_strategy.command = NULL;
260 submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
261 submodule->ignore = NULL;
262 submodule->branch = NULL;
263 submodule->recommend_shallow = -1;
265 oidcpy(&submodule->gitmodules_oid, gitmodules_oid);
267 cache_add(cache, submodule);
269 return submodule;
272 static int parse_fetch_recurse(const char *opt, const char *arg,
273 int die_on_error)
275 switch (git_parse_maybe_bool(arg)) {
276 case 1:
277 return RECURSE_SUBMODULES_ON;
278 case 0:
279 return RECURSE_SUBMODULES_OFF;
280 default:
281 if (!strcmp(arg, "on-demand"))
282 return RECURSE_SUBMODULES_ON_DEMAND;
284 if (die_on_error)
285 die("bad %s argument: %s", opt, arg);
286 else
287 return RECURSE_SUBMODULES_ERROR;
291 int parse_submodule_fetchjobs(const char *var, const char *value)
293 int fetchjobs = git_config_int(var, value);
294 if (fetchjobs < 0)
295 die(_("negative values not allowed for submodule.fetchjobs"));
296 return fetchjobs;
299 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
301 return parse_fetch_recurse(opt, arg, 1);
304 int option_fetch_parse_recurse_submodules(const struct option *opt,
305 const char *arg, int unset)
307 int *v;
309 if (!opt->value)
310 return -1;
312 v = opt->value;
314 if (unset) {
315 *v = RECURSE_SUBMODULES_OFF;
316 } else {
317 if (arg)
318 *v = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
319 else
320 *v = RECURSE_SUBMODULES_ON;
322 return 0;
325 static int parse_update_recurse(const char *opt, const char *arg,
326 int die_on_error)
328 switch (git_parse_maybe_bool(arg)) {
329 case 1:
330 return RECURSE_SUBMODULES_ON;
331 case 0:
332 return RECURSE_SUBMODULES_OFF;
333 default:
334 if (die_on_error)
335 die("bad %s argument: %s", opt, arg);
336 return RECURSE_SUBMODULES_ERROR;
340 int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
342 return parse_update_recurse(opt, arg, 1);
345 static int parse_push_recurse(const char *opt, const char *arg,
346 int die_on_error)
348 switch (git_parse_maybe_bool(arg)) {
349 case 1:
350 /* There's no simple "on" value when pushing */
351 if (die_on_error)
352 die("bad %s argument: %s", opt, arg);
353 else
354 return RECURSE_SUBMODULES_ERROR;
355 case 0:
356 return RECURSE_SUBMODULES_OFF;
357 default:
358 if (!strcmp(arg, "on-demand"))
359 return RECURSE_SUBMODULES_ON_DEMAND;
360 else if (!strcmp(arg, "check"))
361 return RECURSE_SUBMODULES_CHECK;
362 else if (!strcmp(arg, "only"))
363 return RECURSE_SUBMODULES_ONLY;
364 else if (die_on_error)
365 die("bad %s argument: %s", opt, arg);
366 else
367 return RECURSE_SUBMODULES_ERROR;
371 int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
373 return parse_push_recurse(opt, arg, 1);
376 static void warn_multiple_config(const struct object_id *treeish_name,
377 const char *name, const char *option)
379 const char *commit_string = "WORKTREE";
380 if (treeish_name)
381 commit_string = oid_to_hex(treeish_name);
382 warning("%s:.gitmodules, multiple configurations found for "
383 "'submodule.%s.%s'. Skipping second one!",
384 commit_string, name, option);
387 struct parse_config_parameter {
388 struct submodule_cache *cache;
389 const struct object_id *treeish_name;
390 const struct object_id *gitmodules_oid;
391 int overwrite;
394 static int parse_config(const char *var, const char *value, void *data)
396 struct parse_config_parameter *me = data;
397 struct submodule *submodule;
398 struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
399 int ret = 0;
401 /* this also ensures that we only parse submodule entries */
402 if (!name_and_item_from_var(var, &name, &item))
403 return 0;
405 submodule = lookup_or_create_by_name(me->cache,
406 me->gitmodules_oid,
407 name.buf);
409 if (!strcmp(item.buf, "path")) {
410 if (!value)
411 ret = config_error_nonbool(var);
412 else if (!me->overwrite && submodule->path)
413 warn_multiple_config(me->treeish_name, submodule->name,
414 "path");
415 else {
416 if (submodule->path)
417 cache_remove_path(me->cache, submodule);
418 free((void *) submodule->path);
419 submodule->path = xstrdup(value);
420 cache_put_path(me->cache, submodule);
422 } else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
423 /* when parsing worktree configurations we can die early */
424 int die_on_error = is_null_oid(me->gitmodules_oid);
425 if (!me->overwrite &&
426 submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
427 warn_multiple_config(me->treeish_name, submodule->name,
428 "fetchrecursesubmodules");
429 else
430 submodule->fetch_recurse = parse_fetch_recurse(
431 var, value,
432 die_on_error);
433 } else if (!strcmp(item.buf, "ignore")) {
434 if (!value)
435 ret = config_error_nonbool(var);
436 else if (!me->overwrite && submodule->ignore)
437 warn_multiple_config(me->treeish_name, submodule->name,
438 "ignore");
439 else if (strcmp(value, "untracked") &&
440 strcmp(value, "dirty") &&
441 strcmp(value, "all") &&
442 strcmp(value, "none"))
443 warning("Invalid parameter '%s' for config option "
444 "'submodule.%s.ignore'", value, name.buf);
445 else {
446 free((void *) submodule->ignore);
447 submodule->ignore = xstrdup(value);
449 } else if (!strcmp(item.buf, "url")) {
450 if (!value) {
451 ret = config_error_nonbool(var);
452 } else if (!me->overwrite && submodule->url) {
453 warn_multiple_config(me->treeish_name, submodule->name,
454 "url");
455 } else {
456 free((void *) submodule->url);
457 submodule->url = xstrdup(value);
459 } else if (!strcmp(item.buf, "update")) {
460 if (!value)
461 ret = config_error_nonbool(var);
462 else if (!me->overwrite &&
463 submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
464 warn_multiple_config(me->treeish_name, submodule->name,
465 "update");
466 else if (parse_submodule_update_strategy(value,
467 &submodule->update_strategy) < 0)
468 die(_("invalid value for %s"), var);
469 } else if (!strcmp(item.buf, "shallow")) {
470 if (!me->overwrite && submodule->recommend_shallow != -1)
471 warn_multiple_config(me->treeish_name, submodule->name,
472 "shallow");
473 else
474 submodule->recommend_shallow =
475 git_config_bool(var, value);
476 } else if (!strcmp(item.buf, "branch")) {
477 if (!me->overwrite && submodule->branch)
478 warn_multiple_config(me->treeish_name, submodule->name,
479 "branch");
480 else {
481 free((void *)submodule->branch);
482 submodule->branch = xstrdup(value);
486 strbuf_release(&name);
487 strbuf_release(&item);
489 return ret;
492 static int gitmodule_oid_from_commit(const struct object_id *treeish_name,
493 struct object_id *gitmodules_oid,
494 struct strbuf *rev)
496 int ret = 0;
498 if (is_null_oid(treeish_name)) {
499 oidclr(gitmodules_oid);
500 return 1;
503 strbuf_addf(rev, "%s:.gitmodules", oid_to_hex(treeish_name));
504 if (get_oid(rev->buf, gitmodules_oid) >= 0)
505 ret = 1;
507 return ret;
510 /* This does a lookup of a submodule configuration by name or by path
511 * (key) with on-demand reading of the appropriate .gitmodules from
512 * revisions.
514 static const struct submodule *config_from(struct submodule_cache *cache,
515 const struct object_id *treeish_name, const char *key,
516 enum lookup_type lookup_type)
518 struct strbuf rev = STRBUF_INIT;
519 unsigned long config_size;
520 char *config = NULL;
521 struct object_id oid;
522 enum object_type type;
523 const struct submodule *submodule = NULL;
524 struct parse_config_parameter parameter;
527 * If any parameter except the cache is a NULL pointer just
528 * return the first submodule. Can be used to check whether
529 * there are any submodules parsed.
531 if (!treeish_name || !key) {
532 struct hashmap_iter iter;
533 struct submodule_entry *entry;
535 entry = hashmap_iter_first(&cache->for_name, &iter);
536 if (!entry)
537 return NULL;
538 return entry->config;
541 if (!gitmodule_oid_from_commit(treeish_name, &oid, &rev))
542 goto out;
544 switch (lookup_type) {
545 case lookup_name:
546 submodule = cache_lookup_name(cache, &oid, key);
547 break;
548 case lookup_path:
549 submodule = cache_lookup_path(cache, &oid, key);
550 break;
552 if (submodule)
553 goto out;
555 config = read_object_file(&oid, &type, &config_size);
556 if (!config || type != OBJ_BLOB)
557 goto out;
559 /* fill the submodule config into the cache */
560 parameter.cache = cache;
561 parameter.treeish_name = treeish_name;
562 parameter.gitmodules_oid = &oid;
563 parameter.overwrite = 0;
564 git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
565 config, config_size, &parameter, NULL);
566 strbuf_release(&rev);
567 free(config);
569 switch (lookup_type) {
570 case lookup_name:
571 return cache_lookup_name(cache, &oid, key);
572 case lookup_path:
573 return cache_lookup_path(cache, &oid, key);
574 default:
575 return NULL;
578 out:
579 strbuf_release(&rev);
580 free(config);
581 return submodule;
584 static void submodule_cache_check_init(struct repository *repo)
586 if (repo->submodule_cache && repo->submodule_cache->initialized)
587 return;
589 if (!repo->submodule_cache)
590 repo->submodule_cache = submodule_cache_alloc();
592 submodule_cache_init(repo->submodule_cache);
596 * Note: This function is private for a reason, the '.gitmodules' file should
597 * not be used as as a mechanism to retrieve arbitrary configuration stored in
598 * the repository.
600 * Runs the provided config function on the '.gitmodules' file found in the
601 * working directory.
603 static void config_from_gitmodules(config_fn_t fn, struct repository *repo, void *data)
605 if (repo->worktree) {
606 char *file = repo_worktree_path(repo, GITMODULES_FILE);
607 git_config_from_file(fn, file, data);
608 free(file);
612 static int gitmodules_cb(const char *var, const char *value, void *data)
614 struct repository *repo = data;
615 struct parse_config_parameter parameter;
617 parameter.cache = repo->submodule_cache;
618 parameter.treeish_name = NULL;
619 parameter.gitmodules_oid = &null_oid;
620 parameter.overwrite = 1;
622 return parse_config(var, value, &parameter);
625 void repo_read_gitmodules(struct repository *repo)
627 submodule_cache_check_init(repo);
629 if (repo_read_index(repo) < 0)
630 return;
632 if (!is_gitmodules_unmerged(repo->index))
633 config_from_gitmodules(gitmodules_cb, repo, repo);
635 repo->submodule_cache->gitmodules_read = 1;
638 void gitmodules_config_oid(const struct object_id *commit_oid)
640 struct strbuf rev = STRBUF_INIT;
641 struct object_id oid;
643 submodule_cache_check_init(the_repository);
645 if (gitmodule_oid_from_commit(commit_oid, &oid, &rev)) {
646 git_config_from_blob_oid(gitmodules_cb, rev.buf,
647 &oid, the_repository);
649 strbuf_release(&rev);
651 the_repository->submodule_cache->gitmodules_read = 1;
654 static void gitmodules_read_check(struct repository *repo)
656 submodule_cache_check_init(repo);
658 /* read the repo's .gitmodules file if it hasn't been already */
659 if (!repo->submodule_cache->gitmodules_read)
660 repo_read_gitmodules(repo);
663 const struct submodule *submodule_from_name(struct repository *r,
664 const struct object_id *treeish_name,
665 const char *name)
667 gitmodules_read_check(r);
668 return config_from(r->submodule_cache, treeish_name, name, lookup_name);
671 const struct submodule *submodule_from_path(struct repository *r,
672 const struct object_id *treeish_name,
673 const char *path)
675 gitmodules_read_check(r);
676 return config_from(r->submodule_cache, treeish_name, path, lookup_path);
679 void submodule_free(struct repository *r)
681 if (r->submodule_cache)
682 submodule_cache_clear(r->submodule_cache);
685 struct fetch_config {
686 int *max_children;
687 int *recurse_submodules;
690 static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
692 struct fetch_config *config = cb;
693 if (!strcmp(var, "submodule.fetchjobs")) {
694 *(config->max_children) = parse_submodule_fetchjobs(var, value);
695 return 0;
696 } else if (!strcmp(var, "fetch.recursesubmodules")) {
697 *(config->recurse_submodules) = parse_fetch_recurse_submodules_arg(var, value);
698 return 0;
701 return 0;
704 void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules)
706 struct fetch_config config = {
707 .max_children = max_children,
708 .recurse_submodules = recurse_submodules
710 config_from_gitmodules(gitmodules_fetch_config, the_repository, &config);
713 static int gitmodules_update_clone_config(const char *var, const char *value,
714 void *cb)
716 int *max_jobs = cb;
717 if (!strcmp(var, "submodule.fetchjobs"))
718 *max_jobs = parse_submodule_fetchjobs(var, value);
719 return 0;
722 void update_clone_config_from_gitmodules(int *max_jobs)
724 config_from_gitmodules(gitmodules_update_clone_config, the_repository, &max_jobs);