[thirdparty/git.git] / submodule-config.c

#include "cache.h"
#include "submodule-config.h"
#include "submodule.h"
#include "strbuf.h"

/*
 * submodule cache lookup structure
 * There is one shared set of 'struct submodule' entries which can be
 * looked up by their sha1 blob id of the .gitmodule file and either
 * using path or name as key.
 * for_path stores submodule entries with path as key
 * for_name stores submodule entries with name as key
 */
struct submodule_cache {
	struct hashmap for_path;
	struct hashmap for_name;
};

/*
 * thin wrapper struct needed to insert 'struct submodule' entries to
 * the hashmap
 */
struct submodule_entry {
	struct hashmap_entry ent;
	struct submodule *config;
};

enum lookup_type {
	lookup_name,
	lookup_path
};

static struct submodule_cache the_submodule_cache;
static int is_cache_init;

static int config_path_cmp(const struct submodule_entry *a,
			   const struct submodule_entry *b,
			   const void *unused)
{
	return strcmp(a->config->path, b->config->path) ||
	       hashcmp(a->config->gitmodules_sha1, b->config->gitmodules_sha1);
}

static int config_name_cmp(const struct submodule_entry *a,
			   const struct submodule_entry *b,
			   const void *unused)
{
	return strcmp(a->config->name, b->config->name) ||
	       hashcmp(a->config->gitmodules_sha1, b->config->gitmodules_sha1);
}

static void cache_init(struct submodule_cache *cache)
{
	hashmap_init(&cache->for_path, (hashmap_cmp_fn) config_path_cmp, 0);
	hashmap_init(&cache->for_name, (hashmap_cmp_fn) config_name_cmp, 0);
}

static void free_one_config(struct submodule_entry *entry)
{
	free((void *) entry->config->path);
	free((void *) entry->config->name);
	free((void *) entry->config->branch);
	free((void *) entry->config->update_strategy.command);
	free(entry->config);
}

static void cache_free(struct submodule_cache *cache)
{
	struct hashmap_iter iter;
	struct submodule_entry *entry;

	/*
	 * We iterate over the name hash here to be symmetric with the
	 * allocation of struct submodule entries. Each is allocated by
	 * their .gitmodule blob sha1 and submodule name.
	 */
	hashmap_iter_init(&cache->for_name, &iter);
	while ((entry = hashmap_iter_next(&iter)))
		free_one_config(entry);

	hashmap_free(&cache->for_path, 1);
	hashmap_free(&cache->for_name, 1);
}

static unsigned int hash_sha1_string(const unsigned char *sha1,
				     const char *string)
{
	return memhash(sha1, 20) + strhash(string);
}

static void cache_put_path(struct submodule_cache *cache,
			   struct submodule *submodule)
{
	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
					     submodule->path);
	struct submodule_entry *e = xmalloc(sizeof(*e));
	hashmap_entry_init(e, hash);
	e->config = submodule;
	hashmap_put(&cache->for_path, e);
}

static void cache_remove_path(struct submodule_cache *cache,
			      struct submodule *submodule)
{
	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
					     submodule->path);
	struct submodule_entry e;
	struct submodule_entry *removed;
	hashmap_entry_init(&e, hash);
	e.config = submodule;
	removed = hashmap_remove(&cache->for_path, &e, NULL);
	free(removed);
}

static void cache_add(struct submodule_cache *cache,
		      struct submodule *submodule)
{
	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
					     submodule->name);
	struct submodule_entry *e = xmalloc(sizeof(*e));
	hashmap_entry_init(e, hash);
	e->config = submodule;
	hashmap_add(&cache->for_name, e);
}

static const struct submodule *cache_lookup_path(struct submodule_cache *cache,
		const unsigned char *gitmodules_sha1, const char *path)
{
	struct submodule_entry *entry;
	unsigned int hash = hash_sha1_string(gitmodules_sha1, path);
	struct submodule_entry key;
	struct submodule key_config;

	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
	key_config.path = path;

	hashmap_entry_init(&key, hash);
	key.config = &key_config;

	entry = hashmap_get(&cache->for_path, &key, NULL);
	if (entry)
		return entry->config;
	return NULL;
}

static struct submodule *cache_lookup_name(struct submodule_cache *cache,
		const unsigned char *gitmodules_sha1, const char *name)
{
	struct submodule_entry *entry;
	unsigned int hash = hash_sha1_string(gitmodules_sha1, name);
	struct submodule_entry key;
	struct submodule key_config;

	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
	key_config.name = name;

	hashmap_entry_init(&key, hash);
	key.config = &key_config;

	entry = hashmap_get(&cache->for_name, &key, NULL);
	if (entry)
		return entry->config;
	return NULL;
}

static int name_and_item_from_var(const char *var, struct strbuf *name,
				  struct strbuf *item)
{
	const char *subsection, *key;
	int subsection_len, parse;
	parse = parse_config_key(var, "submodule", &subsection,
			&subsection_len, &key);
	if (parse < 0 || !subsection)
		return 0;

	strbuf_add(name, subsection, subsection_len);
	strbuf_addstr(item, key);

	return 1;
}

static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
		const unsigned char *gitmodules_sha1, const char *name)
{
	struct submodule *submodule;
	struct strbuf name_buf = STRBUF_INIT;

	submodule = cache_lookup_name(cache, gitmodules_sha1, name);
	if (submodule)
		return submodule;

	submodule = xmalloc(sizeof(*submodule));

	strbuf_addstr(&name_buf, name);
	submodule->name = strbuf_detach(&name_buf, NULL);

	submodule->path = NULL;
	submodule->url = NULL;
	submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
	submodule->update_strategy.command = NULL;
	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
	submodule->ignore = NULL;
	submodule->branch = NULL;
	submodule->recommend_shallow = -1;

	hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);

	cache_add(cache, submodule);

	return submodule;
}

static int parse_fetch_recurse(const char *opt, const char *arg,
			       int die_on_error)
{
	switch (git_config_maybe_bool(opt, arg)) {
	case 1:
		return RECURSE_SUBMODULES_ON;
	case 0:
		return RECURSE_SUBMODULES_OFF;
	default:
		if (!strcmp(arg, "on-demand"))
			return RECURSE_SUBMODULES_ON_DEMAND;

		if (die_on_error)
			die("bad %s argument: %s", opt, arg);
		else
			return RECURSE_SUBMODULES_ERROR;
	}
}

int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
{
	return parse_fetch_recurse(opt, arg, 1);
}

static int parse_update_recurse(const char *opt, const char *arg,
				int die_on_error)
{
	switch (git_config_maybe_bool(opt, arg)) {
	case 1:
		return RECURSE_SUBMODULES_ON;
	case 0:
		return RECURSE_SUBMODULES_OFF;
	default:
		if (die_on_error)
			die("bad %s argument: %s", opt, arg);
		return RECURSE_SUBMODULES_ERROR;
	}
}

int parse_update_recurse_submodules_arg(const char *opt, const char *arg)
{
	return parse_update_recurse(opt, arg, 1);
}

static int parse_push_recurse(const char *opt, const char *arg,
			       int die_on_error)
{
	switch (git_config_maybe_bool(opt, arg)) {
	case 1:
		/* There's no simple "on" value when pushing */
		if (die_on_error)
			die("bad %s argument: %s", opt, arg);
		else
			return RECURSE_SUBMODULES_ERROR;
	case 0:
		return RECURSE_SUBMODULES_OFF;
	default:
		if (!strcmp(arg, "on-demand"))
			return RECURSE_SUBMODULES_ON_DEMAND;
		else if (!strcmp(arg, "check"))
			return RECURSE_SUBMODULES_CHECK;
		else if (!strcmp(arg, "only"))
			return RECURSE_SUBMODULES_ONLY;
		else if (die_on_error)
			die("bad %s argument: %s", opt, arg);
		else
			return RECURSE_SUBMODULES_ERROR;
	}
}

int parse_push_recurse_submodules_arg(const char *opt, const char *arg)
{
	return parse_push_recurse(opt, arg, 1);
}

static void warn_multiple_config(const unsigned char *treeish_name,
				 const char *name, const char *option)
{
	const char *commit_string = "WORKTREE";
	if (treeish_name)
		commit_string = sha1_to_hex(treeish_name);
	warning("%s:.gitmodules, multiple configurations found for "
			"'submodule.%s.%s'. Skipping second one!",
			commit_string, name, option);
}

struct parse_config_parameter {
	struct submodule_cache *cache;
	const unsigned char *treeish_name;
	const unsigned char *gitmodules_sha1;
	int overwrite;
};

static int parse_config(const char *var, const char *value, void *data)
{
	struct parse_config_parameter *me = data;
	struct submodule *submodule;
	struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
	int ret = 0;

	/* this also ensures that we only parse submodule entries */
	if (!name_and_item_from_var(var, &name, &item))
		return 0;

	submodule = lookup_or_create_by_name(me->cache,
					     me->gitmodules_sha1,
					     name.buf);

	if (!strcmp(item.buf, "path")) {
		if (!value)
			ret = config_error_nonbool(var);
		else if (!me->overwrite && submodule->path)
			warn_multiple_config(me->treeish_name, submodule->name,
					"path");
		else {
			if (submodule->path)
				cache_remove_path(me->cache, submodule);
			free((void *) submodule->path);
			submodule->path = xstrdup(value);
			cache_put_path(me->cache, submodule);
		}
	} else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
		/* when parsing worktree configurations we can die early */
		int die_on_error = is_null_sha1(me->gitmodules_sha1);
		if (!me->overwrite &&
		    submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
			warn_multiple_config(me->treeish_name, submodule->name,
					"fetchrecursesubmodules");
		else
			submodule->fetch_recurse = parse_fetch_recurse(
								var, value,
								die_on_error);
	} else if (!strcmp(item.buf, "ignore")) {
		if (!value)
			ret = config_error_nonbool(var);
		else if (!me->overwrite && submodule->ignore)
			warn_multiple_config(me->treeish_name, submodule->name,
					"ignore");
		else if (strcmp(value, "untracked") &&
			 strcmp(value, "dirty") &&
			 strcmp(value, "all") &&
			 strcmp(value, "none"))
			warning("Invalid parameter '%s' for config option "
					"'submodule.%s.ignore'", value, name.buf);
		else {
			free((void *) submodule->ignore);
			submodule->ignore = xstrdup(value);
		}
	} else if (!strcmp(item.buf, "url")) {
		if (!value) {
			ret = config_error_nonbool(var);
		} else if (!me->overwrite && submodule->url) {
			warn_multiple_config(me->treeish_name, submodule->name,
					"url");
		} else {
			free((void *) submodule->url);
			submodule->url = xstrdup(value);
		}
	} else if (!strcmp(item.buf, "update")) {
		if (!value)
			ret = config_error_nonbool(var);
		else if (!me->overwrite &&
			 submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
			warn_multiple_config(me->treeish_name, submodule->name,
					     "update");
		else if (parse_submodule_update_strategy(value,
			 &submodule->update_strategy) < 0)
				die(_("invalid value for %s"), var);
	} else if (!strcmp(item.buf, "shallow")) {
		if (!me->overwrite && submodule->recommend_shallow != -1)
			warn_multiple_config(me->treeish_name, submodule->name,
					     "shallow");
		else
			submodule->recommend_shallow =
				git_config_bool(var, value);
	} else if (!strcmp(item.buf, "branch")) {
		if (!me->overwrite && submodule->branch)
			warn_multiple_config(me->treeish_name, submodule->name,
					     "branch");
		else {
			free((void *)submodule->branch);
			submodule->branch = xstrdup(value);
		}
	}

	strbuf_release(&name);
	strbuf_release(&item);

	return ret;
}

int gitmodule_sha1_from_commit(const unsigned char *treeish_name,
				      unsigned char *gitmodules_sha1,
				      struct strbuf *rev)
{
	int ret = 0;

	if (is_null_sha1(treeish_name)) {
		hashclr(gitmodules_sha1);
		return 1;
	}

	strbuf_addf(rev, "%s:.gitmodules", sha1_to_hex(treeish_name));
	if (get_sha1(rev->buf, gitmodules_sha1) >= 0)
		ret = 1;

	return ret;
}

/* This does a lookup of a submodule configuration by name or by path
 * (key) with on-demand reading of the appropriate .gitmodules from
 * revisions.
 */
static const struct submodule *config_from(struct submodule_cache *cache,
		const unsigned char *treeish_name, const char *key,
		enum lookup_type lookup_type)
{
	struct strbuf rev = STRBUF_INIT;
	unsigned long config_size;
	char *config = NULL;
	unsigned char sha1[20];
	enum object_type type;
	const struct submodule *submodule = NULL;
	struct parse_config_parameter parameter;

	/*
	 * If any parameter except the cache is a NULL pointer just
	 * return the first submodule. Can be used to check whether
	 * there are any submodules parsed.
	 */
	if (!treeish_name || !key) {
		struct hashmap_iter iter;
		struct submodule_entry *entry;

		entry = hashmap_iter_first(&cache->for_name, &iter);
		if (!entry)
			return NULL;
		return entry->config;
	}

	if (!gitmodule_sha1_from_commit(treeish_name, sha1, &rev))
		goto out;

	switch (lookup_type) {
	case lookup_name:
		submodule = cache_lookup_name(cache, sha1, key);
		break;
	case lookup_path:
		submodule = cache_lookup_path(cache, sha1, key);
		break;
	}
	if (submodule)
		goto out;

	config = read_sha1_file(sha1, &type, &config_size);
	if (!config || type != OBJ_BLOB)
		goto out;

	/* fill the submodule config into the cache */
	parameter.cache = cache;
	parameter.treeish_name = treeish_name;
	parameter.gitmodules_sha1 = sha1;
	parameter.overwrite = 0;
	git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
			config, config_size, &parameter);
	strbuf_release(&rev);
	free(config);

	switch (lookup_type) {
	case lookup_name:
		return cache_lookup_name(cache, sha1, key);
	case lookup_path:
		return cache_lookup_path(cache, sha1, key);
	default:
		return NULL;
	}

out:
	strbuf_release(&rev);
	free(config);
	return submodule;
}

static void ensure_cache_init(void)
{
	if (is_cache_init)
		return;

	cache_init(&the_submodule_cache);
	is_cache_init = 1;
}

int parse_submodule_config_option(const char *var, const char *value)
{
	struct parse_config_parameter parameter;
	parameter.cache = &the_submodule_cache;
	parameter.treeish_name = NULL;
	parameter.gitmodules_sha1 = null_sha1;
	parameter.overwrite = 1;

	ensure_cache_init();
	return parse_config(var, value, &parameter);
}

const struct submodule *submodule_from_name(const unsigned char *treeish_name,
		const char *name)
{
	ensure_cache_init();
	return config_from(&the_submodule_cache, treeish_name, name, lookup_name);
}

const struct submodule *submodule_from_path(const unsigned char *treeish_name,
		const char *path)
{
	ensure_cache_init();
	return config_from(&the_submodule_cache, treeish_name, path, lookup_path);
}

void submodule_free(void)
{
	cache_free(&the_submodule_cache);
	is_cache_init = 0;
}
Commit	Line	Data
959b5455 HV	1	#include "cache.h"
	2	#include "submodule-config.h"
	3	#include "submodule.h"
	4	#include "strbuf.h"
	5
	6	/*
	7	* submodule cache lookup structure
	8	* There is one shared set of 'struct submodule' entries which can be
	9	* looked up by their sha1 blob id of the .gitmodule file and either
	10	* using path or name as key.
	11	* for_path stores submodule entries with path as key
	12	* for_name stores submodule entries with name as key
	13	*/
	14	struct submodule_cache {
	15	struct hashmap for_path;
	16	struct hashmap for_name;
	17	};
	18
	19	/*
	20	* thin wrapper struct needed to insert 'struct submodule' entries to
	21	* the hashmap
	22	*/
	23	struct submodule_entry {
	24	struct hashmap_entry ent;
	25	struct submodule *config;
	26	};
	27
	28	enum lookup_type {
	29	lookup_name,
	30	lookup_path
	31	};
	32
99dab168	33	static struct submodule_cache the_submodule_cache;
959b5455 HV	34	static int is_cache_init;
	35
	36	static int config_path_cmp(const struct submodule_entry *a,
	37	const struct submodule_entry *b,
	38	const void *unused)
	39	{
	40	return strcmp(a->config->path, b->config->path) \|\|
	41	hashcmp(a->config->gitmodules_sha1, b->config->gitmodules_sha1);
	42	}
	43
	44	static int config_name_cmp(const struct submodule_entry *a,
	45	const struct submodule_entry *b,
	46	const void *unused)
	47	{
	48	return strcmp(a->config->name, b->config->name) \|\|
	49	hashcmp(a->config->gitmodules_sha1, b->config->gitmodules_sha1);
	50	}
	51
	52	static void cache_init(struct submodule_cache *cache)
	53	{
	54	hashmap_init(&cache->for_path, (hashmap_cmp_fn) config_path_cmp, 0);
	55	hashmap_init(&cache->for_name, (hashmap_cmp_fn) config_name_cmp, 0);
	56	}
	57
	58	static void free_one_config(struct submodule_entry *entry)
	59	{
	60	free((void *) entry->config->path);
	61	free((void *) entry->config->name);
b5944f34	62	free((void *) entry->config->branch);
ea2fa5a3	63	free((void *) entry->config->update_strategy.command);
959b5455 HV	64	free(entry->config);
	65	}
	66
	67	static void cache_free(struct submodule_cache *cache)
	68	{
	69	struct hashmap_iter iter;
	70	struct submodule_entry *entry;
	71
	72	/*
	73	* We iterate over the name hash here to be symmetric with the
	74	* allocation of struct submodule entries. Each is allocated by
	75	* their .gitmodule blob sha1 and submodule name.
	76	*/
	77	hashmap_iter_init(&cache->for_name, &iter);
	78	while ((entry = hashmap_iter_next(&iter)))
	79	free_one_config(entry);
	80
	81	hashmap_free(&cache->for_path, 1);
	82	hashmap_free(&cache->for_name, 1);
	83	}
	84
	85	static unsigned int hash_sha1_string(const unsigned char *sha1,
	86	const char *string)
	87	{
	88	return memhash(sha1, 20) + strhash(string);
	89	}
	90
	91	static void cache_put_path(struct submodule_cache *cache,
	92	struct submodule *submodule)
	93	{
	94	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	95	submodule->path);
	96	struct submodule_entry e = xmalloc(sizeof(e));
	97	hashmap_entry_init(e, hash);
	98	e->config = submodule;
	99	hashmap_put(&cache->for_path, e);
	100	}
	101
	102	static void cache_remove_path(struct submodule_cache *cache,
	103	struct submodule *submodule)
	104	{
	105	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	106	submodule->path);
	107	struct submodule_entry e;
	108	struct submodule_entry *removed;
	109	hashmap_entry_init(&e, hash);
	110	e.config = submodule;
	111	removed = hashmap_remove(&cache->for_path, &e, NULL);
	112	free(removed);
	113	}
	114
	115	static void cache_add(struct submodule_cache *cache,
	116	struct submodule *submodule)
	117	{
	118	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	119	submodule->name);
	120	struct submodule_entry e = xmalloc(sizeof(e));
	121	hashmap_entry_init(e, hash);
	122	e->config = submodule;
	123	hashmap_add(&cache->for_name, e);
	124	}
	125
	126	static const struct submodule cache_lookup_path(struct submodule_cache cache,
	127	const unsigned char gitmodules_sha1, const char path)
128	{
129	struct submodule_entry *entry;
130	unsigned int hash = hash_sha1_string(gitmodules_sha1, path);
131	struct submodule_entry key;
132	struct submodule key_config;
133
134	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
135	key_config.path = path;
136
137	hashmap_entry_init(&key, hash);
138	key.config = &key_config;
139
140	entry = hashmap_get(&cache->for_path, &key, NULL);
141	if (entry)
142	return entry->config;
143	return NULL;
144	}
145
146	static struct submodule cache_lookup_name(struct submodule_cache cache,
147	const unsigned char gitmodules_sha1, const char name)
148	{
149	struct submodule_entry *entry;
150	unsigned int hash = hash_sha1_string(gitmodules_sha1, name);
151	struct submodule_entry key;
152	struct submodule key_config;
153
154	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
155	key_config.name = name;
156
157	hashmap_entry_init(&key, hash);
158	key.config = &key_config;
159
160	entry = hashmap_get(&cache->for_name, &key, NULL);
161	if (entry)
162	return entry->config;
163	return NULL;
164	}
165
166	static int name_and_item_from_var(const char var, struct strbuf name,
167	struct strbuf *item)
168	{
169	const char subsection, key;
170	int subsection_len, parse;
171	parse = parse_config_key(var, "submodule", &subsection,
172	&subsection_len, &key);
173	if (parse < 0 \|\| !subsection)
174	return 0;
175
176	strbuf_add(name, subsection, subsection_len);
177	strbuf_addstr(item, key);
178
179	return 1;
180	}
181
182	static struct submodule lookup_or_create_by_name(struct submodule_cache cache,
183	const unsigned char gitmodules_sha1, const char name)
184	{
185	struct submodule *submodule;
186	struct strbuf name_buf = STRBUF_INIT;
187
188	submodule = cache_lookup_name(cache, gitmodules_sha1, name);
189	if (submodule)
190	return submodule;
191
192	submodule = xmalloc(sizeof(*submodule));
193
194	strbuf_addstr(&name_buf, name);
195	submodule->name = strbuf_detach(&name_buf, NULL);
196
197	submodule->path = NULL;
198	submodule->url = NULL;
ea2fa5a3 SB	199	submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
ea2fa5a3 SB	200	submodule->update_strategy.command = NULL;
959b5455 HV	201	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
959b5455 HV	202	submodule->ignore = NULL;
b5944f34	203	submodule->branch = NULL;
37f52e93	204	submodule->recommend_shallow = -1;
959b5455 HV	205
	206	hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);
	207
	208	cache_add(cache, submodule);
	209
	210	return submodule;
	211	}
	212
027771fc HV	213	static int parse_fetch_recurse(const char opt, const char arg,
	214	int die_on_error)
	215	{
	216	switch (git_config_maybe_bool(opt, arg)) {
	217	case 1:
	218	return RECURSE_SUBMODULES_ON;
	219	case 0:
	220	return RECURSE_SUBMODULES_OFF;
	221	default:
	222	if (!strcmp(arg, "on-demand"))
	223	return RECURSE_SUBMODULES_ON_DEMAND;
	224
	225	if (die_on_error)
	226	die("bad %s argument: %s", opt, arg);
	227	else
	228	return RECURSE_SUBMODULES_ERROR;
	229	}
	230	}
	231
	232	int parse_fetch_recurse_submodules_arg(const char opt, const char arg)
	233	{
	234	return parse_fetch_recurse(opt, arg, 1);
	235	}
	236
d601fd09 SB	237	static int parse_update_recurse(const char opt, const char arg,
	238	int die_on_error)
	239	{
	240	switch (git_config_maybe_bool(opt, arg)) {
	241	case 1:
	242	return RECURSE_SUBMODULES_ON;
	243	case 0:
	244	return RECURSE_SUBMODULES_OFF;
	245	default:
	246	if (die_on_error)
	247	die("bad %s argument: %s", opt, arg);
	248	return RECURSE_SUBMODULES_ERROR;
	249	}
	250	}
	251
	252	int parse_update_recurse_submodules_arg(const char opt, const char arg)
	253	{
	254	return parse_update_recurse(opt, arg, 1);
	255	}
	256
b33a15b0 MC	257	static int parse_push_recurse(const char opt, const char arg,
	258	int die_on_error)
	259	{
	260	switch (git_config_maybe_bool(opt, arg)) {
	261	case 1:
	262	/* There's no simple "on" value when pushing */
	263	if (die_on_error)
	264	die("bad %s argument: %s", opt, arg);
	265	else
	266	return RECURSE_SUBMODULES_ERROR;
	267	case 0:
	268	return RECURSE_SUBMODULES_OFF;
	269	default:
	270	if (!strcmp(arg, "on-demand"))
	271	return RECURSE_SUBMODULES_ON_DEMAND;
	272	else if (!strcmp(arg, "check"))
	273	return RECURSE_SUBMODULES_CHECK;
6c656c3f BW	274	else if (!strcmp(arg, "only"))
6c656c3f BW	275	return RECURSE_SUBMODULES_ONLY;
b33a15b0 MC	276	else if (die_on_error)
	277	die("bad %s argument: %s", opt, arg);
	278	else
	279	return RECURSE_SUBMODULES_ERROR;
	280	}
	281	}
	282
	283	int parse_push_recurse_submodules_arg(const char opt, const char arg)
	284	{
	285	return parse_push_recurse(opt, arg, 1);
	286	}
	287
73c293bb	288	static void warn_multiple_config(const unsigned char *treeish_name,
959b5455 HV	289	const char name, const char option)
	290	{
	291	const char *commit_string = "WORKTREE";
73c293bb SB	292	if (treeish_name)
73c293bb SB	293	commit_string = sha1_to_hex(treeish_name);
959b5455 HV	294	warning("%s:.gitmodules, multiple configurations found for "
	295	"'submodule.%s.%s'. Skipping second one!",
	296	commit_string, name, option);
	297	}
	298
	299	struct parse_config_parameter {
	300	struct submodule_cache *cache;
73c293bb	301	const unsigned char *treeish_name;
959b5455 HV	302	const unsigned char *gitmodules_sha1;
	303	int overwrite;
	304	};
	305
	306	static int parse_config(const char var, const char value, void *data)
	307	{
	308	struct parse_config_parameter *me = data;
	309	struct submodule *submodule;
	310	struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
	311	int ret = 0;
	312
	313	/* this also ensures that we only parse submodule entries */
	314	if (!name_and_item_from_var(var, &name, &item))
	315	return 0;
	316
147875fd SB	317	submodule = lookup_or_create_by_name(me->cache,
	318	me->gitmodules_sha1,
	319	name.buf);
959b5455 HV	320
959b5455 HV	321	if (!strcmp(item.buf, "path")) {
147875fd	322	if (!value)
959b5455	323	ret = config_error_nonbool(var);
f73da110	324	else if (!me->overwrite && submodule->path)
73c293bb	325	warn_multiple_config(me->treeish_name, submodule->name,
959b5455	326	"path");
147875fd SB	327	else {
	328	if (submodule->path)
	329	cache_remove_path(me->cache, submodule);
	330	free((void *) submodule->path);
	331	submodule->path = xstrdup(value);
	332	cache_put_path(me->cache, submodule);
959b5455	333	}
959b5455	334	} else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
027771fc HV	335	/* when parsing worktree configurations we can die early */
027771fc HV	336	int die_on_error = is_null_sha1(me->gitmodules_sha1);
959b5455	337	if (!me->overwrite &&
147875fd	338	submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
73c293bb	339	warn_multiple_config(me->treeish_name, submodule->name,
959b5455	340	"fetchrecursesubmodules");
147875fd SB	341	else
	342	submodule->fetch_recurse = parse_fetch_recurse(
	343	var, value,
027771fc	344	die_on_error);
959b5455	345	} else if (!strcmp(item.buf, "ignore")) {
147875fd SB	346	if (!value)
147875fd SB	347	ret = config_error_nonbool(var);
f73da110	348	else if (!me->overwrite && submodule->ignore)
73c293bb	349	warn_multiple_config(me->treeish_name, submodule->name,
959b5455	350	"ignore");
147875fd SB	351	else if (strcmp(value, "untracked") &&
	352	strcmp(value, "dirty") &&
	353	strcmp(value, "all") &&
	354	strcmp(value, "none"))
959b5455	355	warning("Invalid parameter '%s' for config option "
5ea30489	356	"'submodule.%s.ignore'", value, name.buf);
147875fd SB	357	else {
	358	free((void *) submodule->ignore);
	359	submodule->ignore = xstrdup(value);
959b5455	360	}
959b5455	361	} else if (!strcmp(item.buf, "url")) {
959b5455 HV	362	if (!value) {
959b5455 HV	363	ret = config_error_nonbool(var);
f73da110	364	} else if (!me->overwrite && submodule->url) {
73c293bb	365	warn_multiple_config(me->treeish_name, submodule->name,
959b5455	366	"url");
147875fd SB	367	} else {
	368	free((void *) submodule->url);
	369	submodule->url = xstrdup(value);
959b5455	370	}
ea2fa5a3 SB	371	} else if (!strcmp(item.buf, "update")) {
	372	if (!value)
	373	ret = config_error_nonbool(var);
	374	else if (!me->overwrite &&
	375	submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
73c293bb	376	warn_multiple_config(me->treeish_name, submodule->name,
ea2fa5a3 SB	377	"update");
	378	else if (parse_submodule_update_strategy(value,
	379	&submodule->update_strategy) < 0)
	380	die(_("invalid value for %s"), var);
37f52e93 SB	381	} else if (!strcmp(item.buf, "shallow")) {
37f52e93 SB	382	if (!me->overwrite && submodule->recommend_shallow != -1)
73c293bb	383	warn_multiple_config(me->treeish_name, submodule->name,
37f52e93	384	"shallow");
b5944f34	385	else
37f52e93 SB	386	submodule->recommend_shallow =
37f52e93 SB	387	git_config_bool(var, value);
b5944f34 SB	388	} else if (!strcmp(item.buf, "branch")) {
b5944f34 SB	389	if (!me->overwrite && submodule->branch)
73c293bb	390	warn_multiple_config(me->treeish_name, submodule->name,
b5944f34 SB	391	"branch");
	392	else {
	393	free((void *)submodule->branch);
	394	submodule->branch = xstrdup(value);
37f52e93	395	}
959b5455 HV	396	}
959b5455 HV	397
959b5455 HV	398	strbuf_release(&name);
	399	strbuf_release(&item);
	400
	401	return ret;
	402	}
	403
55d128ae	404	int gitmodule_sha1_from_commit(const unsigned char *treeish_name,
514dea90 HV	405	unsigned char *gitmodules_sha1,
514dea90 HV	406	struct strbuf *rev)
959b5455	407	{
959b5455 HV	408	int ret = 0;
959b5455 HV	409
73c293bb	410	if (is_null_sha1(treeish_name)) {
f449198e	411	hashclr(gitmodules_sha1);
959b5455 HV	412	return 1;
	413	}
	414
73c293bb	415	strbuf_addf(rev, "%s:.gitmodules", sha1_to_hex(treeish_name));
514dea90	416	if (get_sha1(rev->buf, gitmodules_sha1) >= 0)
959b5455 HV	417	ret = 1;
959b5455 HV	418
959b5455 HV	419	return ret;
	420	}
	421
	422	/* This does a lookup of a submodule configuration by name or by path
	423	* (key) with on-demand reading of the appropriate .gitmodules from
	424	* revisions.
	425	*/
	426	static const struct submodule config_from(struct submodule_cache cache,
73c293bb	427	const unsigned char treeish_name, const char key,
959b5455 HV	428	enum lookup_type lookup_type)
	429	{
	430	struct strbuf rev = STRBUF_INIT;
	431	unsigned long config_size;
0918e250	432	char *config = NULL;
959b5455 HV	433	unsigned char sha1[20];
	434	enum object_type type;
	435	const struct submodule *submodule = NULL;
	436	struct parse_config_parameter parameter;
	437
	438	/*
	439	* If any parameter except the cache is a NULL pointer just
	440	* return the first submodule. Can be used to check whether
	441	* there are any submodules parsed.
	442	*/
73c293bb	443	if (!treeish_name \|\| !key) {
959b5455 HV	444	struct hashmap_iter iter;
	445	struct submodule_entry *entry;
	446
01d98e8a	447	entry = hashmap_iter_first(&cache->for_name, &iter);
959b5455 HV	448	if (!entry)
	449	return NULL;
	450	return entry->config;
	451	}
	452
73c293bb	453	if (!gitmodule_sha1_from_commit(treeish_name, sha1, &rev))
0918e250	454	goto out;
959b5455 HV	455
	456	switch (lookup_type) {
	457	case lookup_name:
	458	submodule = cache_lookup_name(cache, sha1, key);
	459	break;
	460	case lookup_path:
	461	submodule = cache_lookup_path(cache, sha1, key);
	462	break;
	463	}
	464	if (submodule)
0918e250	465	goto out;
959b5455 HV	466
959b5455 HV	467	config = read_sha1_file(sha1, &type, &config_size);
0918e250 HV	468	if (!config \|\| type != OBJ_BLOB)
0918e250 HV	469	goto out;
959b5455 HV	470
	471	/* fill the submodule config into the cache */
	472	parameter.cache = cache;
73c293bb	473	parameter.treeish_name = treeish_name;
959b5455 HV	474	parameter.gitmodules_sha1 = sha1;
959b5455 HV	475	parameter.overwrite = 0;
1b8132d9	476	git_config_from_mem(parse_config, CONFIG_ORIGIN_SUBMODULE_BLOB, rev.buf,
473166b9	477	config, config_size, &parameter);
514dea90	478	strbuf_release(&rev);
959b5455 HV	479	free(config);
	480
	481	switch (lookup_type) {
	482	case lookup_name:
	483	return cache_lookup_name(cache, sha1, key);
	484	case lookup_path:
	485	return cache_lookup_path(cache, sha1, key);
	486	default:
	487	return NULL;
	488	}
0918e250 HV	489
	490	out:
	491	strbuf_release(&rev);
	492	free(config);
	493	return submodule;
959b5455 HV	494	}
959b5455 HV	495
959b5455 HV	496	static void ensure_cache_init(void)
	497	{
	498	if (is_cache_init)
	499	return;
	500
99dab168	501	cache_init(&the_submodule_cache);
959b5455 HV	502	is_cache_init = 1;
	503	}
	504
851e18c3 HV	505	int parse_submodule_config_option(const char var, const char value)
	506	{
	507	struct parse_config_parameter parameter;
99dab168	508	parameter.cache = &the_submodule_cache;
73c293bb	509	parameter.treeish_name = NULL;
851e18c3 HV	510	parameter.gitmodules_sha1 = null_sha1;
	511	parameter.overwrite = 1;
	512
	513	ensure_cache_init();
	514	return parse_config(var, value, &parameter);
	515	}
	516
73c293bb	517	const struct submodule submodule_from_name(const unsigned char treeish_name,
959b5455 HV	518	const char *name)
	519	{
	520	ensure_cache_init();
73c293bb	521	return config_from(&the_submodule_cache, treeish_name, name, lookup_name);
959b5455 HV	522	}
959b5455 HV	523
73c293bb	524	const struct submodule submodule_from_path(const unsigned char treeish_name,
959b5455 HV	525	const char *path)
	526	{
	527	ensure_cache_init();
73c293bb	528	return config_from(&the_submodule_cache, treeish_name, path, lookup_path);
959b5455 HV	529	}
	530
	531	void submodule_free(void)
	532	{
99dab168	533	cache_free(&the_submodule_cache);
959b5455 HV	534	is_cache_init = 0;
959b5455 HV	535	}