[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->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;

	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_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 (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 *commit_sha1,
				 const char *name, const char *option)
{
	const char *commit_string = "WORKTREE";
	if (commit_sha1)
		commit_string = sha1_to_hex(commit_sha1);
	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 *commit_sha1;
	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->commit_sha1, 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->commit_sha1, 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->commit_sha1, 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, var);
		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->commit_sha1, 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->commit_sha1, submodule->name,
					     "update");
		else if (parse_submodule_update_strategy(value,
			 &submodule->update_strategy) < 0)
				die(_("invalid value for %s"), var);
	}

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

	return ret;
}

static int gitmodule_sha1_from_commit(const unsigned char *commit_sha1,
				      unsigned char *gitmodules_sha1)
{
	struct strbuf rev = STRBUF_INIT;
	int ret = 0;

	if (is_null_sha1(commit_sha1)) {
		hashcpy(gitmodules_sha1, null_sha1);
		return 1;
	}

	strbuf_addf(&rev, "%s:.gitmodules", sha1_to_hex(commit_sha1));
	if (get_sha1(rev.buf, gitmodules_sha1) >= 0)
		ret = 1;

	strbuf_release(&rev);
	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 *commit_sha1, const char *key,
		enum lookup_type lookup_type)
{
	struct strbuf rev = STRBUF_INIT;
	unsigned long config_size;
	char *config;
	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 (!commit_sha1 || !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(commit_sha1, sha1))
		return NULL;

	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)
		return submodule;

	config = read_sha1_file(sha1, &type, &config_size);
	if (!config)
		return NULL;

	if (type != OBJ_BLOB) {
		free(config);
		return NULL;
	}

	/* fill the submodule config into the cache */
	parameter.cache = cache;
	parameter.commit_sha1 = commit_sha1;
	parameter.gitmodules_sha1 = sha1;
	parameter.overwrite = 0;
	git_config_from_mem(parse_config, "submodule-blob", rev.buf,
			config, config_size, &parameter);
	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;
	}
}

static const struct submodule *config_from_path(struct submodule_cache *cache,
		const unsigned char *commit_sha1, const char *path)
{
	return config_from(cache, commit_sha1, path, lookup_path);
}

static const struct submodule *config_from_name(struct submodule_cache *cache,
		const unsigned char *commit_sha1, const char *name)
{
	return config_from(cache, commit_sha1, name, lookup_name);
}

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.commit_sha1 = 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 *commit_sha1,
		const char *name)
{
	ensure_cache_init();
	return config_from_name(&the_submodule_cache, commit_sha1, name);
}

const struct submodule *submodule_from_path(const unsigned char *commit_sha1,
		const char *path)
{
	ensure_cache_init();
	return config_from_path(&the_submodule_cache, commit_sha1, 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);
ea2fa5a3	62	free((void *) entry->config->update_strategy.command);
959b5455 HV	63	free(entry->config);
	64	}
	65
	66	static void cache_free(struct submodule_cache *cache)
	67	{
	68	struct hashmap_iter iter;
	69	struct submodule_entry *entry;
	70
	71	/*
	72	* We iterate over the name hash here to be symmetric with the
	73	* allocation of struct submodule entries. Each is allocated by
	74	* their .gitmodule blob sha1 and submodule name.
	75	*/
	76	hashmap_iter_init(&cache->for_name, &iter);
	77	while ((entry = hashmap_iter_next(&iter)))
	78	free_one_config(entry);
	79
	80	hashmap_free(&cache->for_path, 1);
	81	hashmap_free(&cache->for_name, 1);
	82	}
	83
	84	static unsigned int hash_sha1_string(const unsigned char *sha1,
	85	const char *string)
	86	{
	87	return memhash(sha1, 20) + strhash(string);
	88	}
	89
	90	static void cache_put_path(struct submodule_cache *cache,
	91	struct submodule *submodule)
	92	{
	93	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	94	submodule->path);
	95	struct submodule_entry e = xmalloc(sizeof(e));
	96	hashmap_entry_init(e, hash);
	97	e->config = submodule;
	98	hashmap_put(&cache->for_path, e);
	99	}
	100
	101	static void cache_remove_path(struct submodule_cache *cache,
	102	struct submodule *submodule)
	103	{
	104	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	105	submodule->path);
	106	struct submodule_entry e;
	107	struct submodule_entry *removed;
	108	hashmap_entry_init(&e, hash);
	109	e.config = submodule;
	110	removed = hashmap_remove(&cache->for_path, &e, NULL);
	111	free(removed);
	112	}
	113
	114	static void cache_add(struct submodule_cache *cache,
	115	struct submodule *submodule)
	116	{
	117	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	118	submodule->name);
	119	struct submodule_entry e = xmalloc(sizeof(e));
	120	hashmap_entry_init(e, hash);
	121	e->config = submodule;
	122	hashmap_add(&cache->for_name, e);
	123	}
	124
	125	static const struct submodule cache_lookup_path(struct submodule_cache cache,
	126	const unsigned char gitmodules_sha1, const char path)
127	{
128	struct submodule_entry *entry;
129	unsigned int hash = hash_sha1_string(gitmodules_sha1, path);
130	struct submodule_entry key;
131	struct submodule key_config;
132
133	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
134	key_config.path = path;
135
136	hashmap_entry_init(&key, hash);
137	key.config = &key_config;
138
139	entry = hashmap_get(&cache->for_path, &key, NULL);
140	if (entry)
141	return entry->config;
142	return NULL;
143	}
144
145	static struct submodule cache_lookup_name(struct submodule_cache cache,
146	const unsigned char gitmodules_sha1, const char name)
147	{
148	struct submodule_entry *entry;
149	unsigned int hash = hash_sha1_string(gitmodules_sha1, name);
150	struct submodule_entry key;
151	struct submodule key_config;
152
153	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
154	key_config.name = name;
155
156	hashmap_entry_init(&key, hash);
157	key.config = &key_config;
158
159	entry = hashmap_get(&cache->for_name, &key, NULL);
160	if (entry)
161	return entry->config;
162	return NULL;
163	}
164
165	static int name_and_item_from_var(const char var, struct strbuf name,
166	struct strbuf *item)
167	{
168	const char subsection, key;
169	int subsection_len, parse;
170	parse = parse_config_key(var, "submodule", &subsection,
171	&subsection_len, &key);
172	if (parse < 0 \|\| !subsection)
173	return 0;
174
175	strbuf_add(name, subsection, subsection_len);
176	strbuf_addstr(item, key);
177
178	return 1;
179	}
180
181	static struct submodule lookup_or_create_by_name(struct submodule_cache cache,
182	const unsigned char gitmodules_sha1, const char name)
183	{
184	struct submodule *submodule;
185	struct strbuf name_buf = STRBUF_INIT;
186
187	submodule = cache_lookup_name(cache, gitmodules_sha1, name);
188	if (submodule)
189	return submodule;
190
191	submodule = xmalloc(sizeof(*submodule));
192
193	strbuf_addstr(&name_buf, name);
194	submodule->name = strbuf_detach(&name_buf, NULL);
195
196	submodule->path = NULL;
197	submodule->url = NULL;
ea2fa5a3 SB	198	submodule->update_strategy.type = SM_UPDATE_UNSPECIFIED;
ea2fa5a3 SB	199	submodule->update_strategy.command = NULL;
959b5455 HV	200	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
	201	submodule->ignore = NULL;
	202
	203	hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);
	204
	205	cache_add(cache, submodule);
	206
	207	return submodule;
	208	}
	209
027771fc HV	210	static int parse_fetch_recurse(const char opt, const char arg,
	211	int die_on_error)
	212	{
	213	switch (git_config_maybe_bool(opt, arg)) {
	214	case 1:
	215	return RECURSE_SUBMODULES_ON;
	216	case 0:
	217	return RECURSE_SUBMODULES_OFF;
	218	default:
	219	if (!strcmp(arg, "on-demand"))
	220	return RECURSE_SUBMODULES_ON_DEMAND;
	221
	222	if (die_on_error)
	223	die("bad %s argument: %s", opt, arg);
	224	else
	225	return RECURSE_SUBMODULES_ERROR;
	226	}
	227	}
	228
	229	int parse_fetch_recurse_submodules_arg(const char opt, const char arg)
	230	{
	231	return parse_fetch_recurse(opt, arg, 1);
	232	}
	233
b33a15b0 MC	234	static int parse_push_recurse(const char opt, const char arg,
	235	int die_on_error)
	236	{
	237	switch (git_config_maybe_bool(opt, arg)) {
	238	case 1:
	239	/* There's no simple "on" value when pushing */
	240	if (die_on_error)
	241	die("bad %s argument: %s", opt, arg);
	242	else
	243	return RECURSE_SUBMODULES_ERROR;
	244	case 0:
	245	return RECURSE_SUBMODULES_OFF;
	246	default:
	247	if (!strcmp(arg, "on-demand"))
	248	return RECURSE_SUBMODULES_ON_DEMAND;
	249	else if (!strcmp(arg, "check"))
	250	return RECURSE_SUBMODULES_CHECK;
	251	else if (die_on_error)
	252	die("bad %s argument: %s", opt, arg);
	253	else
	254	return RECURSE_SUBMODULES_ERROR;
	255	}
	256	}
	257
	258	int parse_push_recurse_submodules_arg(const char opt, const char arg)
	259	{
	260	return parse_push_recurse(opt, arg, 1);
	261	}
	262
959b5455 HV	263	static void warn_multiple_config(const unsigned char *commit_sha1,
	264	const char name, const char option)
	265	{
	266	const char *commit_string = "WORKTREE";
	267	if (commit_sha1)
	268	commit_string = sha1_to_hex(commit_sha1);
	269	warning("%s:.gitmodules, multiple configurations found for "
	270	"'submodule.%s.%s'. Skipping second one!",
	271	commit_string, name, option);
	272	}
	273
	274	struct parse_config_parameter {
	275	struct submodule_cache *cache;
	276	const unsigned char *commit_sha1;
	277	const unsigned char *gitmodules_sha1;
	278	int overwrite;
	279	};
	280
	281	static int parse_config(const char var, const char value, void *data)
	282	{
	283	struct parse_config_parameter *me = data;
	284	struct submodule *submodule;
	285	struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
	286	int ret = 0;
	287
	288	/* this also ensures that we only parse submodule entries */
	289	if (!name_and_item_from_var(var, &name, &item))
	290	return 0;
	291
147875fd SB	292	submodule = lookup_or_create_by_name(me->cache,
	293	me->gitmodules_sha1,
	294	name.buf);
959b5455 HV	295
959b5455 HV	296	if (!strcmp(item.buf, "path")) {
147875fd	297	if (!value)
959b5455	298	ret = config_error_nonbool(var);
f73da110	299	else if (!me->overwrite && submodule->path)
959b5455 HV	300	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	301	"path");
147875fd SB	302	else {
	303	if (submodule->path)
	304	cache_remove_path(me->cache, submodule);
	305	free((void *) submodule->path);
	306	submodule->path = xstrdup(value);
	307	cache_put_path(me->cache, submodule);
959b5455	308	}
959b5455	309	} else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
027771fc HV	310	/* when parsing worktree configurations we can die early */
027771fc HV	311	int die_on_error = is_null_sha1(me->gitmodules_sha1);
959b5455	312	if (!me->overwrite &&
147875fd	313	submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
959b5455 HV	314	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	315	"fetchrecursesubmodules");
147875fd SB	316	else
	317	submodule->fetch_recurse = parse_fetch_recurse(
	318	var, value,
027771fc	319	die_on_error);
959b5455	320	} else if (!strcmp(item.buf, "ignore")) {
147875fd SB	321	if (!value)
147875fd SB	322	ret = config_error_nonbool(var);
f73da110	323	else if (!me->overwrite && submodule->ignore)
959b5455 HV	324	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	325	"ignore");
147875fd SB	326	else if (strcmp(value, "untracked") &&
	327	strcmp(value, "dirty") &&
	328	strcmp(value, "all") &&
	329	strcmp(value, "none"))
959b5455 HV	330	warning("Invalid parameter '%s' for config option "
959b5455 HV	331	"'submodule.%s.ignore'", value, var);
147875fd SB	332	else {
	333	free((void *) submodule->ignore);
	334	submodule->ignore = xstrdup(value);
959b5455	335	}
959b5455	336	} else if (!strcmp(item.buf, "url")) {
959b5455 HV	337	if (!value) {
959b5455 HV	338	ret = config_error_nonbool(var);
f73da110	339	} else if (!me->overwrite && submodule->url) {
959b5455 HV	340	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	341	"url");
147875fd SB	342	} else {
	343	free((void *) submodule->url);
	344	submodule->url = xstrdup(value);
959b5455	345	}
ea2fa5a3 SB	346	} else if (!strcmp(item.buf, "update")) {
	347	if (!value)
	348	ret = config_error_nonbool(var);
	349	else if (!me->overwrite &&
	350	submodule->update_strategy.type != SM_UPDATE_UNSPECIFIED)
	351	warn_multiple_config(me->commit_sha1, submodule->name,
	352	"update");
	353	else if (parse_submodule_update_strategy(value,
	354	&submodule->update_strategy) < 0)
	355	die(_("invalid value for %s"), var);
959b5455 HV	356	}
959b5455 HV	357
959b5455 HV	358	strbuf_release(&name);
	359	strbuf_release(&item);
	360
	361	return ret;
	362	}
	363
	364	static int gitmodule_sha1_from_commit(const unsigned char *commit_sha1,
	365	unsigned char *gitmodules_sha1)
	366	{
	367	struct strbuf rev = STRBUF_INIT;
	368	int ret = 0;
	369
	370	if (is_null_sha1(commit_sha1)) {
	371	hashcpy(gitmodules_sha1, null_sha1);
	372	return 1;
	373	}
	374
	375	strbuf_addf(&rev, "%s:.gitmodules", sha1_to_hex(commit_sha1));
	376	if (get_sha1(rev.buf, gitmodules_sha1) >= 0)
	377	ret = 1;
	378
	379	strbuf_release(&rev);
	380	return ret;
	381	}
	382
	383	/* This does a lookup of a submodule configuration by name or by path
	384	* (key) with on-demand reading of the appropriate .gitmodules from
	385	* revisions.
	386	*/
	387	static const struct submodule config_from(struct submodule_cache cache,
	388	const unsigned char commit_sha1, const char key,
	389	enum lookup_type lookup_type)
	390	{
	391	struct strbuf rev = STRBUF_INIT;
	392	unsigned long config_size;
	393	char *config;
	394	unsigned char sha1[20];
	395	enum object_type type;
	396	const struct submodule *submodule = NULL;
	397	struct parse_config_parameter parameter;
	398
	399	/*
	400	* If any parameter except the cache is a NULL pointer just
	401	* return the first submodule. Can be used to check whether
	402	* there are any submodules parsed.
	403	*/
	404	if (!commit_sha1 \|\| !key) {
	405	struct hashmap_iter iter;
	406	struct submodule_entry *entry;
	407
01d98e8a	408	entry = hashmap_iter_first(&cache->for_name, &iter);
959b5455 HV	409	if (!entry)
	410	return NULL;
	411	return entry->config;
	412	}
	413
	414	if (!gitmodule_sha1_from_commit(commit_sha1, sha1))
	415	return NULL;
	416
	417	switch (lookup_type) {
	418	case lookup_name:
	419	submodule = cache_lookup_name(cache, sha1, key);
	420	break;
	421	case lookup_path:
	422	submodule = cache_lookup_path(cache, sha1, key);
	423	break;
	424	}
	425	if (submodule)
	426	return submodule;
	427
	428	config = read_sha1_file(sha1, &type, &config_size);
	429	if (!config)
	430	return NULL;
	431
	432	if (type != OBJ_BLOB) {
	433	free(config);
	434	return NULL;
	435	}
	436
	437	/* fill the submodule config into the cache */
	438	parameter.cache = cache;
	439	parameter.commit_sha1 = commit_sha1;
	440	parameter.gitmodules_sha1 = sha1;
	441	parameter.overwrite = 0;
473166b9 LS	442	git_config_from_mem(parse_config, "submodule-blob", rev.buf,
473166b9 LS	443	config, config_size, &parameter);
959b5455 HV	444	free(config);
	445
	446	switch (lookup_type) {
	447	case lookup_name:
	448	return cache_lookup_name(cache, sha1, key);
	449	case lookup_path:
	450	return cache_lookup_path(cache, sha1, key);
	451	default:
	452	return NULL;
	453	}
	454	}
	455
	456	static const struct submodule config_from_path(struct submodule_cache cache,
	457	const unsigned char commit_sha1, const char path)
	458	{
	459	return config_from(cache, commit_sha1, path, lookup_path);
	460	}
	461
	462	static const struct submodule config_from_name(struct submodule_cache cache,
	463	const unsigned char commit_sha1, const char name)
	464	{
	465	return config_from(cache, commit_sha1, name, lookup_name);
	466	}
	467
	468	static void ensure_cache_init(void)
	469	{
	470	if (is_cache_init)
	471	return;
	472
99dab168	473	cache_init(&the_submodule_cache);
959b5455 HV	474	is_cache_init = 1;
	475	}
	476
851e18c3 HV	477	int parse_submodule_config_option(const char var, const char value)
	478	{
	479	struct parse_config_parameter parameter;
99dab168	480	parameter.cache = &the_submodule_cache;
851e18c3 HV	481	parameter.commit_sha1 = NULL;
	482	parameter.gitmodules_sha1 = null_sha1;
	483	parameter.overwrite = 1;
	484
	485	ensure_cache_init();
	486	return parse_config(var, value, &parameter);
	487	}
	488
959b5455 HV	489	const struct submodule submodule_from_name(const unsigned char commit_sha1,
	490	const char *name)
	491	{
	492	ensure_cache_init();
99dab168	493	return config_from_name(&the_submodule_cache, commit_sha1, name);
959b5455 HV	494	}
	495
	496	const struct submodule submodule_from_path(const unsigned char commit_sha1,
	497	const char *path)
	498	{
	499	ensure_cache_init();
99dab168	500	return config_from_path(&the_submodule_cache, commit_sha1, path);
959b5455 HV	501	}
	502
	503	void submodule_free(void)
	504	{
99dab168	505	cache_free(&the_submodule_cache);
959b5455 HV	506	is_cache_init = 0;
959b5455 HV	507	}