[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(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->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 != NULL)
			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 != NULL)
			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 != NULL) {
			warn_multiple_config(me->commit_sha1, submodule->name,
					"url");
		} else {
			free((void *) submodule->url);
			submodule->url = xstrdup(value);
		}
	}

	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)
{
	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;

	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, &rev)) {
		strbuf_release(&rev);
		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) {
		strbuf_release(&rev);
		return submodule;
	}

	config = read_sha1_file(sha1, &type, &config_size);
	if (!config) {
		strbuf_release(&rev);
		return NULL;
	}

	if (type != OBJ_BLOB) {
		strbuf_release(&rev);
		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);
	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;
	}
}

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);
	62	free(entry->config);
	63	}
	64
	65	static void cache_free(struct submodule_cache *cache)
	66	{
	67	struct hashmap_iter iter;
	68	struct submodule_entry *entry;
	69
	70	/*
	71	* We iterate over the name hash here to be symmetric with the
	72	* allocation of struct submodule entries. Each is allocated by
	73	* their .gitmodule blob sha1 and submodule name.
	74	*/
	75	hashmap_iter_init(&cache->for_name, &iter);
	76	while ((entry = hashmap_iter_next(&iter)))
	77	free_one_config(entry);
	78
	79	hashmap_free(&cache->for_path, 1);
	80	hashmap_free(&cache->for_name, 1);
	81	}
	82
	83	static unsigned int hash_sha1_string(const unsigned char *sha1,
	84	const char *string)
	85	{
	86	return memhash(sha1, 20) + strhash(string);
	87	}
	88
	89	static void cache_put_path(struct submodule_cache *cache,
	90	struct submodule *submodule)
	91	{
	92	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
	93	submodule->path);
	94	struct submodule_entry e = xmalloc(sizeof(e));
	95	hashmap_entry_init(e, hash);
	96	e->config = submodule;
	97	hashmap_put(&cache->for_path, e);
98	}
99
100	static void cache_remove_path(struct submodule_cache *cache,
101	struct submodule *submodule)
102	{
103	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
104	submodule->path);
105	struct submodule_entry e;
106	struct submodule_entry *removed;
107	hashmap_entry_init(&e, hash);
108	e.config = submodule;
109	removed = hashmap_remove(&cache->for_path, &e, NULL);
110	free(removed);
111	}
112
113	static void cache_add(struct submodule_cache *cache,
114	struct submodule *submodule)
115	{
116	unsigned int hash = hash_sha1_string(submodule->gitmodules_sha1,
117	submodule->name);
118	struct submodule_entry e = xmalloc(sizeof(e));
119	hashmap_entry_init(e, hash);
120	e->config = submodule;
121	hashmap_add(&cache->for_name, e);
122	}
123
124	static const struct submodule cache_lookup_path(struct submodule_cache cache,
125	const unsigned char gitmodules_sha1, const char path)
126	{
127	struct submodule_entry *entry;
128	unsigned int hash = hash_sha1_string(gitmodules_sha1, path);
129	struct submodule_entry key;
130	struct submodule key_config;
131
132	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
133	key_config.path = path;
134
135	hashmap_entry_init(&key, hash);
136	key.config = &key_config;
137
138	entry = hashmap_get(&cache->for_path, &key, NULL);
139	if (entry)
140	return entry->config;
141	return NULL;
142	}
143
144	static struct submodule cache_lookup_name(struct submodule_cache cache,
145	const unsigned char gitmodules_sha1, const char name)
146	{
147	struct submodule_entry *entry;
148	unsigned int hash = hash_sha1_string(gitmodules_sha1, name);
149	struct submodule_entry key;
150	struct submodule key_config;
151
152	hashcpy(key_config.gitmodules_sha1, gitmodules_sha1);
153	key_config.name = name;
154
155	hashmap_entry_init(&key, hash);
156	key.config = &key_config;
157
158	entry = hashmap_get(&cache->for_name, &key, NULL);
159	if (entry)
160	return entry->config;
161	return NULL;
162	}
163
164	static int name_and_item_from_var(const char var, struct strbuf name,
165	struct strbuf *item)
166	{
167	const char subsection, key;
168	int subsection_len, parse;
169	parse = parse_config_key(var, "submodule", &subsection,
170	&subsection_len, &key);
171	if (parse < 0 \|\| !subsection)
172	return 0;
173
174	strbuf_add(name, subsection, subsection_len);
175	strbuf_addstr(item, key);
176
177	return 1;
178	}
179
180	static struct submodule lookup_or_create_by_name(struct submodule_cache cache,
181	const unsigned char gitmodules_sha1, const char name)
182	{
183	struct submodule *submodule;
184	struct strbuf name_buf = STRBUF_INIT;
185
186	submodule = cache_lookup_name(cache, gitmodules_sha1, name);
187	if (submodule)
188	return submodule;
189
190	submodule = xmalloc(sizeof(*submodule));
191
192	strbuf_addstr(&name_buf, name);
193	submodule->name = strbuf_detach(&name_buf, NULL);
194
195	submodule->path = NULL;
196	submodule->url = NULL;
197	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
198	submodule->ignore = NULL;
199
200	hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);
201
202	cache_add(cache, submodule);
203
204	return submodule;
205	}
206
027771fc HV	207	static int parse_fetch_recurse(const char opt, const char arg,
	208	int die_on_error)
	209	{
	210	switch (git_config_maybe_bool(opt, arg)) {
	211	case 1:
	212	return RECURSE_SUBMODULES_ON;
	213	case 0:
	214	return RECURSE_SUBMODULES_OFF;
	215	default:
	216	if (!strcmp(arg, "on-demand"))
	217	return RECURSE_SUBMODULES_ON_DEMAND;
	218
	219	if (die_on_error)
	220	die("bad %s argument: %s", opt, arg);
	221	else
	222	return RECURSE_SUBMODULES_ERROR;
	223	}
	224	}
	225
	226	int parse_fetch_recurse_submodules_arg(const char opt, const char arg)
	227	{
	228	return parse_fetch_recurse(opt, arg, 1);
	229	}
	230
b33a15b0 MC	231	static int parse_push_recurse(const char opt, const char arg,
	232	int die_on_error)
	233	{
	234	switch (git_config_maybe_bool(opt, arg)) {
	235	case 1:
	236	/* There's no simple "on" value when pushing */
	237	if (die_on_error)
	238	die("bad %s argument: %s", opt, arg);
	239	else
	240	return RECURSE_SUBMODULES_ERROR;
	241	case 0:
	242	return RECURSE_SUBMODULES_OFF;
	243	default:
	244	if (!strcmp(arg, "on-demand"))
	245	return RECURSE_SUBMODULES_ON_DEMAND;
	246	else if (!strcmp(arg, "check"))
	247	return RECURSE_SUBMODULES_CHECK;
	248	else if (die_on_error)
	249	die("bad %s argument: %s", opt, arg);
	250	else
	251	return RECURSE_SUBMODULES_ERROR;
	252	}
	253	}
	254
	255	int parse_push_recurse_submodules_arg(const char opt, const char arg)
	256	{
	257	return parse_push_recurse(opt, arg, 1);
	258	}
	259
959b5455 HV	260	static void warn_multiple_config(const unsigned char *commit_sha1,
	261	const char name, const char option)
	262	{
	263	const char *commit_string = "WORKTREE";
	264	if (commit_sha1)
	265	commit_string = sha1_to_hex(commit_sha1);
	266	warning("%s:.gitmodules, multiple configurations found for "
	267	"'submodule.%s.%s'. Skipping second one!",
	268	commit_string, name, option);
	269	}
	270
	271	struct parse_config_parameter {
	272	struct submodule_cache *cache;
	273	const unsigned char *commit_sha1;
	274	const unsigned char *gitmodules_sha1;
	275	int overwrite;
	276	};
	277
	278	static int parse_config(const char var, const char value, void *data)
	279	{
	280	struct parse_config_parameter *me = data;
	281	struct submodule *submodule;
	282	struct strbuf name = STRBUF_INIT, item = STRBUF_INIT;
	283	int ret = 0;
	284
	285	/* this also ensures that we only parse submodule entries */
	286	if (!name_and_item_from_var(var, &name, &item))
	287	return 0;
	288
147875fd SB	289	submodule = lookup_or_create_by_name(me->cache,
	290	me->gitmodules_sha1,
	291	name.buf);
959b5455 HV	292
959b5455 HV	293	if (!strcmp(item.buf, "path")) {
147875fd	294	if (!value)
959b5455	295	ret = config_error_nonbool(var);
147875fd	296	else if (!me->overwrite && submodule->path != NULL)
959b5455 HV	297	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	298	"path");
147875fd SB	299	else {
	300	if (submodule->path)
	301	cache_remove_path(me->cache, submodule);
	302	free((void *) submodule->path);
	303	submodule->path = xstrdup(value);
	304	cache_put_path(me->cache, submodule);
959b5455	305	}
959b5455	306	} else if (!strcmp(item.buf, "fetchrecursesubmodules")) {
027771fc HV	307	/* when parsing worktree configurations we can die early */
027771fc HV	308	int die_on_error = is_null_sha1(me->gitmodules_sha1);
959b5455	309	if (!me->overwrite &&
147875fd	310	submodule->fetch_recurse != RECURSE_SUBMODULES_NONE)
959b5455 HV	311	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	312	"fetchrecursesubmodules");
147875fd SB	313	else
	314	submodule->fetch_recurse = parse_fetch_recurse(
	315	var, value,
027771fc	316	die_on_error);
959b5455	317	} else if (!strcmp(item.buf, "ignore")) {
147875fd SB	318	if (!value)
	319	ret = config_error_nonbool(var);
	320	else if (!me->overwrite && submodule->ignore != NULL)
959b5455 HV	321	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	322	"ignore");
147875fd SB	323	else if (strcmp(value, "untracked") &&
	324	strcmp(value, "dirty") &&
	325	strcmp(value, "all") &&
	326	strcmp(value, "none"))
959b5455 HV	327	warning("Invalid parameter '%s' for config option "
959b5455 HV	328	"'submodule.%s.ignore'", value, var);
147875fd SB	329	else {
	330	free((void *) submodule->ignore);
	331	submodule->ignore = xstrdup(value);
959b5455	332	}
959b5455	333	} else if (!strcmp(item.buf, "url")) {
959b5455 HV	334	if (!value) {
959b5455 HV	335	ret = config_error_nonbool(var);
147875fd	336	} else if (!me->overwrite && submodule->url != NULL) {
959b5455 HV	337	warn_multiple_config(me->commit_sha1, submodule->name,
959b5455 HV	338	"url");
147875fd SB	339	} else {
	340	free((void *) submodule->url);
	341	submodule->url = xstrdup(value);
959b5455	342	}
959b5455 HV	343	}
959b5455 HV	344
959b5455 HV	345	strbuf_release(&name);
	346	strbuf_release(&item);
	347
	348	return ret;
	349	}
	350
	351	static int gitmodule_sha1_from_commit(const unsigned char *commit_sha1,
514dea90 HV	352	unsigned char *gitmodules_sha1,
514dea90 HV	353	struct strbuf *rev)
959b5455	354	{
959b5455 HV	355	int ret = 0;
	356
	357	if (is_null_sha1(commit_sha1)) {
	358	hashcpy(gitmodules_sha1, null_sha1);
	359	return 1;
	360	}
	361
514dea90 HV	362	strbuf_addf(rev, "%s:.gitmodules", sha1_to_hex(commit_sha1));
514dea90 HV	363	if (get_sha1(rev->buf, gitmodules_sha1) >= 0)
959b5455 HV	364	ret = 1;
959b5455 HV	365
959b5455 HV	366	return ret;
	367	}
	368
	369	/* This does a lookup of a submodule configuration by name or by path
	370	* (key) with on-demand reading of the appropriate .gitmodules from
	371	* revisions.
	372	*/
	373	static const struct submodule config_from(struct submodule_cache cache,
	374	const unsigned char commit_sha1, const char key,
	375	enum lookup_type lookup_type)
	376	{
514dea90	377	struct strbuf rev = STRBUF_INIT;
959b5455 HV	378	unsigned long config_size;
	379	char *config;
	380	unsigned char sha1[20];
	381	enum object_type type;
	382	const struct submodule *submodule = NULL;
	383	struct parse_config_parameter parameter;
	384
	385	/*
	386	* If any parameter except the cache is a NULL pointer just
	387	* return the first submodule. Can be used to check whether
	388	* there are any submodules parsed.
	389	*/
	390	if (!commit_sha1 \|\| !key) {
	391	struct hashmap_iter iter;
	392	struct submodule_entry *entry;
	393
01d98e8a	394	entry = hashmap_iter_first(&cache->for_name, &iter);
959b5455 HV	395	if (!entry)
	396	return NULL;
	397	return entry->config;
	398	}
	399
514dea90 HV	400	if (!gitmodule_sha1_from_commit(commit_sha1, sha1, &rev)) {
514dea90 HV	401	strbuf_release(&rev);
959b5455	402	return NULL;
514dea90	403	}
959b5455 HV	404
	405	switch (lookup_type) {
	406	case lookup_name:
	407	submodule = cache_lookup_name(cache, sha1, key);
	408	break;
	409	case lookup_path:
	410	submodule = cache_lookup_path(cache, sha1, key);
	411	break;
	412	}
514dea90 HV	413	if (submodule) {
514dea90 HV	414	strbuf_release(&rev);
959b5455	415	return submodule;
514dea90	416	}
959b5455 HV	417
959b5455 HV	418	config = read_sha1_file(sha1, &type, &config_size);
514dea90 HV	419	if (!config) {
514dea90 HV	420	strbuf_release(&rev);
959b5455	421	return NULL;
514dea90	422	}
959b5455 HV	423
959b5455 HV	424	if (type != OBJ_BLOB) {
514dea90	425	strbuf_release(&rev);
959b5455 HV	426	free(config);
	427	return NULL;
	428	}
	429
	430	/* fill the submodule config into the cache */
	431	parameter.cache = cache;
	432	parameter.commit_sha1 = commit_sha1;
	433	parameter.gitmodules_sha1 = sha1;
	434	parameter.overwrite = 0;
514dea90	435	git_config_from_mem(parse_config, "submodule-blob", rev.buf,
473166b9	436	config, config_size, &parameter);
514dea90	437	strbuf_release(&rev);
959b5455 HV	438	free(config);
	439
	440	switch (lookup_type) {
	441	case lookup_name:
	442	return cache_lookup_name(cache, sha1, key);
	443	case lookup_path:
	444	return cache_lookup_path(cache, sha1, key);
	445	default:
	446	return NULL;
	447	}
	448	}
	449
	450	static const struct submodule config_from_path(struct submodule_cache cache,
	451	const unsigned char commit_sha1, const char path)
	452	{
	453	return config_from(cache, commit_sha1, path, lookup_path);
	454	}
	455
	456	static const struct submodule config_from_name(struct submodule_cache cache,
	457	const unsigned char commit_sha1, const char name)
	458	{
	459	return config_from(cache, commit_sha1, name, lookup_name);
	460	}
	461
	462	static void ensure_cache_init(void)
	463	{
	464	if (is_cache_init)
	465	return;
	466
99dab168	467	cache_init(&the_submodule_cache);
959b5455 HV	468	is_cache_init = 1;
	469	}
	470
851e18c3 HV	471	int parse_submodule_config_option(const char var, const char value)
	472	{
	473	struct parse_config_parameter parameter;
99dab168	474	parameter.cache = &the_submodule_cache;
851e18c3 HV	475	parameter.commit_sha1 = NULL;
	476	parameter.gitmodules_sha1 = null_sha1;
	477	parameter.overwrite = 1;
	478
	479	ensure_cache_init();
	480	return parse_config(var, value, &parameter);
	481	}
	482
959b5455 HV	483	const struct submodule submodule_from_name(const unsigned char commit_sha1,
	484	const char *name)
	485	{
	486	ensure_cache_init();
99dab168	487	return config_from_name(&the_submodule_cache, commit_sha1, name);
959b5455 HV	488	}
	489
	490	const struct submodule submodule_from_path(const unsigned char commit_sha1,
	491	const char *path)
	492	{
	493	ensure_cache_init();
99dab168	494	return config_from_path(&the_submodule_cache, commit_sha1, path);
959b5455 HV	495	}
	496
	497	void submodule_free(void)
	498	{
99dab168	499	cache_free(&the_submodule_cache);
959b5455 HV	500	is_cache_init = 0;
959b5455 HV	501	}