[thirdparty/git.git] / repository.c

/*
 * not really _using_ the compat macros, just make sure the_index
 * declaration matches the definition in this file.
 */
#define USE_THE_INDEX_VARIABLE
#include "cache.h"
#include "abspath.h"
#include "repository.h"
#include "object-store.h"
#include "config.h"
#include "object.h"
#include "lockfile.h"
#include "read-cache-ll.h"
#include "remote.h"
#include "setup.h"
#include "submodule-config.h"
#include "sparse-index.h"
#include "trace2.h"
#include "promisor-remote.h"

/* The main repository */
static struct repository the_repo;
struct repository *the_repository;
struct index_state the_index;

void initialize_the_repository(void)
{
	the_repository = &the_repo;

	the_repo.index = &the_index;
	the_repo.objects = raw_object_store_new();
	the_repo.remote_state = remote_state_new();
	the_repo.parsed_objects = parsed_object_pool_new();

	index_state_init(&the_index, the_repository);

	repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
}

static void expand_base_dir(char **out, const char *in,
			    const char *base_dir, const char *def_in)
{
	free(*out);
	if (in)
		*out = xstrdup(in);
	else
		*out = xstrfmt("%s/%s", base_dir, def_in);
}

static void repo_set_commondir(struct repository *repo,
			       const char *commondir)
{
	struct strbuf sb = STRBUF_INIT;

	free(repo->commondir);

	if (commondir) {
		repo->different_commondir = 1;
		repo->commondir = xstrdup(commondir);
		return;
	}

	repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
	repo->commondir = strbuf_detach(&sb, NULL);
}

void repo_set_gitdir(struct repository *repo,
		     const char *root,
		     const struct set_gitdir_args *o)
{
	const char *gitfile = read_gitfile(root);
	/*
	 * repo->gitdir is saved because the caller could pass "root"
	 * that also points to repo->gitdir. We want to keep it alive
	 * until after xstrdup(root). Then we can free it.
	 */
	char *old_gitdir = repo->gitdir;

	repo->gitdir = xstrdup(gitfile ? gitfile : root);
	free(old_gitdir);

	repo_set_commondir(repo, o->commondir);

	if (!repo->objects->odb) {
		CALLOC_ARRAY(repo->objects->odb, 1);
		repo->objects->odb_tail = &repo->objects->odb->next;
	}
	expand_base_dir(&repo->objects->odb->path, o->object_dir,
			repo->commondir, "objects");

	repo->objects->odb->disable_ref_updates = o->disable_ref_updates;

	free(repo->objects->alternate_db);
	repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
	expand_base_dir(&repo->graft_file, o->graft_file,
			repo->commondir, "info/grafts");
	expand_base_dir(&repo->index_file, o->index_file,
			repo->gitdir, "index");
}

void repo_set_hash_algo(struct repository *repo, int hash_algo)
{
	repo->hash_algo = &hash_algos[hash_algo];
}

/*
 * Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
 * Return 0 upon success and a non-zero value upon failure.
 */
static int repo_init_gitdir(struct repository *repo, const char *gitdir)
{
	int ret = 0;
	int error = 0;
	char *abspath = NULL;
	const char *resolved_gitdir;
	struct set_gitdir_args args = { NULL };

	abspath = real_pathdup(gitdir, 0);
	if (!abspath) {
		ret = -1;
		goto out;
	}

	/* 'gitdir' must reference the gitdir directly */
	resolved_gitdir = resolve_gitdir_gently(abspath, &error);
	if (!resolved_gitdir) {
		ret = -1;
		goto out;
	}

	repo_set_gitdir(repo, resolved_gitdir, &args);

out:
	free(abspath);
	return ret;
}

void repo_set_worktree(struct repository *repo, const char *path)
{
	repo->worktree = real_pathdup(path, 1);

	trace2_def_repo(repo);
}

static int read_and_verify_repository_format(struct repository_format *format,
					     const char *commondir)
{
	int ret = 0;
	struct strbuf sb = STRBUF_INIT;

	strbuf_addf(&sb, "%s/config", commondir);
	read_repository_format(format, sb.buf);
	strbuf_reset(&sb);

	if (verify_repository_format(format, &sb) < 0) {
		warning("%s", sb.buf);
		ret = -1;
	}

	strbuf_release(&sb);
	return ret;
}

/*
 * Initialize 'repo' based on the provided 'gitdir'.
 * Return 0 upon success and a non-zero value upon failure.
 */
int repo_init(struct repository *repo,
	      const char *gitdir,
	      const char *worktree)
{
	struct repository_format format = REPOSITORY_FORMAT_INIT;
	memset(repo, 0, sizeof(*repo));

	repo->objects = raw_object_store_new();
	repo->parsed_objects = parsed_object_pool_new();
	repo->remote_state = remote_state_new();

	if (repo_init_gitdir(repo, gitdir))
		goto error;

	if (read_and_verify_repository_format(&format, repo->commondir))
		goto error;

	repo_set_hash_algo(repo, format.hash_algo);
	repo->repository_format_worktree_config = format.worktree_config;

	/* take ownership of format.partial_clone */
	repo->repository_format_partial_clone = format.partial_clone;
	format.partial_clone = NULL;

	if (worktree)
		repo_set_worktree(repo, worktree);

	clear_repository_format(&format);
	return 0;

error:
	repo_clear(repo);
	return -1;
}

int repo_submodule_init(struct repository *subrepo,
			struct repository *superproject,
			const char *path,
			const struct object_id *treeish_name)
{
	struct strbuf gitdir = STRBUF_INIT;
	struct strbuf worktree = STRBUF_INIT;
	int ret = 0;

	strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
	strbuf_repo_worktree_path(&worktree, superproject, "%s", path);

	if (repo_init(subrepo, gitdir.buf, worktree.buf)) {
		/*
		 * If initialization fails then it may be due to the submodule
		 * not being populated in the superproject's worktree.  Instead
		 * we can try to initialize the submodule by finding it's gitdir
		 * in the superproject's 'modules' directory.  In this case the
		 * submodule would not have a worktree.
		 */
		const struct submodule *sub =
			submodule_from_path(superproject, treeish_name, path);
		if (!sub) {
			ret = -1;
			goto out;
		}

		strbuf_reset(&gitdir);
		submodule_name_to_gitdir(&gitdir, superproject, sub->name);

		if (repo_init(subrepo, gitdir.buf, NULL)) {
			ret = -1;
			goto out;
		}
	}

	subrepo->submodule_prefix = xstrfmt("%s%s/",
					    superproject->submodule_prefix ?
					    superproject->submodule_prefix :
					    "", path);

out:
	strbuf_release(&gitdir);
	strbuf_release(&worktree);
	return ret;
}

static void repo_clear_path_cache(struct repo_path_cache *cache)
{
	FREE_AND_NULL(cache->squash_msg);
	FREE_AND_NULL(cache->squash_msg);
	FREE_AND_NULL(cache->merge_msg);
	FREE_AND_NULL(cache->merge_rr);
	FREE_AND_NULL(cache->merge_mode);
	FREE_AND_NULL(cache->merge_head);
	FREE_AND_NULL(cache->merge_autostash);
	FREE_AND_NULL(cache->auto_merge);
	FREE_AND_NULL(cache->fetch_head);
	FREE_AND_NULL(cache->shallow);
}

void repo_clear(struct repository *repo)
{
	FREE_AND_NULL(repo->gitdir);
	FREE_AND_NULL(repo->commondir);
	FREE_AND_NULL(repo->graft_file);
	FREE_AND_NULL(repo->index_file);
	FREE_AND_NULL(repo->worktree);
	FREE_AND_NULL(repo->submodule_prefix);

	raw_object_store_clear(repo->objects);
	FREE_AND_NULL(repo->objects);

	parsed_object_pool_clear(repo->parsed_objects);
	FREE_AND_NULL(repo->parsed_objects);

	if (repo->config) {
		git_configset_clear(repo->config);
		FREE_AND_NULL(repo->config);
	}

	if (repo->submodule_cache) {
		submodule_cache_free(repo->submodule_cache);
		repo->submodule_cache = NULL;
	}

	if (repo->index) {
		discard_index(repo->index);
		if (repo->index != &the_index)
			FREE_AND_NULL(repo->index);
	}

	if (repo->promisor_remote_config) {
		promisor_remote_clear(repo->promisor_remote_config);
		FREE_AND_NULL(repo->promisor_remote_config);
	}

	if (repo->remote_state) {
		remote_state_clear(repo->remote_state);
		FREE_AND_NULL(repo->remote_state);
	}

	repo_clear_path_cache(&repo->cached_paths);
}

int repo_read_index(struct repository *repo)
{
	int res;

	/* Complete the double-reference */
	if (!repo->index) {
		ALLOC_ARRAY(repo->index, 1);
		index_state_init(repo->index, repo);
	} else if (repo->index->repo != repo) {
		BUG("repo's index should point back at itself");
	}

	res = read_index_from(repo->index, repo->index_file, repo->gitdir);

	prepare_repo_settings(repo);
	if (repo->settings.command_requires_full_index)
		ensure_full_index(repo->index);

	/*
	 * If sparse checkouts are in use, check whether paths with the
	 * SKIP_WORKTREE attribute are missing from the worktree; if not,
	 * clear that attribute for that path.
	 */
	clear_skip_worktree_from_present_files(repo->index);

	return res;
}

int repo_hold_locked_index(struct repository *repo,
			   struct lock_file *lf,
			   int flags)
{
	if (!repo->index_file)
		BUG("the repo hasn't been setup");
	return hold_lock_file_for_update(lf, repo->index_file, flags);
}
Commit	Line	Data
f8adbec9 NTND	1	/*
	2	* not really _using_ the compat macros, just make sure the_index
	3	* declaration matches the definition in this file.
	4	*/
666f53eb	5	#define USE_THE_INDEX_VARIABLE
359efeff	6	#include "cache.h"
0b027f6c	7	#include "abspath.h"
359efeff	8	#include "repository.h"
90c62155	9	#include "object-store.h"
3b256228	10	#include "config.h"
99bf115c	11	#include "object.h"
3a95f31d	12	#include "lockfile.h"
08c46a49	13	#include "read-cache-ll.h"
fd3cb050	14	#include "remote.h"
e38da487	15	#include "setup.h"
bf12fcdf	16	#include "submodule-config.h"
3964fc2a	17	#include "sparse-index.h"
74ea5c95	18	#include "trace2.h"
ef7dc2e9	19	#include "promisor-remote.h"
359efeff BW	20
359efeff BW	21	/* The main repository */
b2f0ecee NTND	22	static struct repository the_repo;
b2f0ecee NTND	23	struct repository *the_repository;
f8adbec9	24	struct index_state the_index;
b2f0ecee NTND	25
	26	void initialize_the_repository(void)
	27	{
	28	the_repository = &the_repo;
	29
	30	the_repo.index = &the_index;
90c62155	31	the_repo.objects = raw_object_store_new();
fd3cb050	32	the_repo.remote_state = remote_state_new();
99bf115c SB	33	the_repo.parsed_objects = parsed_object_pool_new();
99bf115c SB	34
6269f8ea ÆAB	35	index_state_init(&the_index, the_repository);
6269f8ea ÆAB	36
b2f0ecee NTND	37	repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
b2f0ecee NTND	38	}
359efeff	39
357a03eb NTND	40	static void expand_base_dir(char *out, const char in,
	41	const char base_dir, const char def_in)
	42	{
	43	free(*out);
	44	if (in)
	45	*out = xstrdup(in);
	46	else
	47	*out = xstrfmt("%s/%s", base_dir, def_in);
	48	}
	49
	50	static void repo_set_commondir(struct repository *repo,
	51	const char *commondir)
359efeff BW	52	{
	53	struct strbuf sb = STRBUF_INIT;
	54
f9b7573f	55	free(repo->commondir);
357a03eb NTND	56
	57	if (commondir) {
	58	repo->different_commondir = 1;
	59	repo->commondir = xstrdup(commondir);
	60	return;
	61	}
	62
	63	repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
359efeff	64	repo->commondir = strbuf_detach(&sb, NULL);
359efeff BW	65	}
359efeff BW	66
357a03eb NTND	67	void repo_set_gitdir(struct repository *repo,
	68	const char *root,
	69	const struct set_gitdir_args *o)
359efeff	70	{
357a03eb NTND	71	const char *gitfile = read_gitfile(root);
	72	/*
	73	* repo->gitdir is saved because the caller could pass "root"
	74	* that also points to repo->gitdir. We want to keep it alive
	75	* until after xstrdup(root). Then we can free it.
	76	*/
1fb2b636	77	char *old_gitdir = repo->gitdir;
359efeff	78
357a03eb	79	repo->gitdir = xstrdup(gitfile ? gitfile : root);
1fb2b636	80	free(old_gitdir);
357a03eb NTND	81
357a03eb NTND	82	repo_set_commondir(repo, o->commondir);
f0eaf638 JK	83
f0eaf638 JK	84	if (!repo->objects->odb) {
ca56dadb	85	CALLOC_ARRAY(repo->objects->odb, 1);
f0eaf638 JK	86	repo->objects->odb_tail = &repo->objects->odb->next;
	87	}
	88	expand_base_dir(&repo->objects->odb->path, o->object_dir,
357a03eb	89	repo->commondir, "objects");
f0eaf638	90
ecd81dfc NS	91	repo->objects->odb->disable_ref_updates = o->disable_ref_updates;
ecd81dfc NS	92
90c62155 SB	93	free(repo->objects->alternate_db);
90c62155 SB	94	repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
357a03eb NTND	95	expand_base_dir(&repo->graft_file, o->graft_file,
	96	repo->commondir, "info/grafts");
	97	expand_base_dir(&repo->index_file, o->index_file,
	98	repo->gitdir, "index");
359efeff BW	99	}
359efeff BW	100
78a67668	101	void repo_set_hash_algo(struct repository *repo, int hash_algo)
	102	{
	103	repo->hash_algo = &hash_algos[hash_algo];
	104	}
	105
359efeff BW	106	/*
	107	* Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
	108	* Return 0 upon success and a non-zero value upon failure.
	109	*/
	110	static int repo_init_gitdir(struct repository repo, const char gitdir)
	111	{
	112	int ret = 0;
	113	int error = 0;
	114	char *abspath = NULL;
	115	const char *resolved_gitdir;
357a03eb	116	struct set_gitdir_args args = { NULL };
359efeff BW	117
	118	abspath = real_pathdup(gitdir, 0);
	119	if (!abspath) {
	120	ret = -1;
	121	goto out;
	122	}
	123
	124	/* 'gitdir' must reference the gitdir directly */
	125	resolved_gitdir = resolve_gitdir_gently(abspath, &error);
	126	if (!resolved_gitdir) {
	127	ret = -1;
	128	goto out;
	129	}
	130
357a03eb	131	repo_set_gitdir(repo, resolved_gitdir, &args);
359efeff BW	132
	133	out:
	134	free(abspath);
	135	return ret;
	136	}
	137
	138	void repo_set_worktree(struct repository repo, const char path)
	139	{
	140	repo->worktree = real_pathdup(path, 1);
ee4512ed JH	141
ee4512ed JH	142	trace2_def_repo(repo);
359efeff BW	143	}
	144
	145	static int read_and_verify_repository_format(struct repository_format *format,
	146	const char *commondir)
	147	{
	148	int ret = 0;
	149	struct strbuf sb = STRBUF_INIT;
	150
	151	strbuf_addf(&sb, "%s/config", commondir);
	152	read_repository_format(format, sb.buf);
	153	strbuf_reset(&sb);
	154
	155	if (verify_repository_format(format, &sb) < 0) {
	156	warning("%s", sb.buf);
	157	ret = -1;
	158	}
	159
	160	strbuf_release(&sb);
	161	return ret;
	162	}
	163
	164	/*
	165	* Initialize 'repo' based on the provided 'gitdir'.
	166	* Return 0 upon success and a non-zero value upon failure.
	167	*/
da62f786 SB	168	int repo_init(struct repository *repo,
	169	const char *gitdir,
	170	const char *worktree)
359efeff	171	{
e8805af1	172	struct repository_format format = REPOSITORY_FORMAT_INIT;
359efeff BW	173	memset(repo, 0, sizeof(*repo));
359efeff BW	174
90c62155	175	repo->objects = raw_object_store_new();
99bf115c	176	repo->parsed_objects = parsed_object_pool_new();
fd3cb050	177	repo->remote_state = remote_state_new();
90c62155	178
359efeff BW	179	if (repo_init_gitdir(repo, gitdir))
	180	goto error;
	181
	182	if (read_and_verify_repository_format(&format, repo->commondir))
	183	goto error;
	184
78a67668	185	repo_set_hash_algo(repo, format.hash_algo);
3867f6d6	186	repo->repository_format_worktree_config = format.worktree_config;
78a67668	187
ebaf3bcf JT	188	/* take ownership of format.partial_clone */
	189	repo->repository_format_partial_clone = format.partial_clone;
	190	format.partial_clone = NULL;
	191
359efeff BW	192	if (worktree)
	193	repo_set_worktree(repo, worktree);
	194
e8805af1	195	clear_repository_format(&format);
359efeff BW	196	return 0;
	197
	198	error:
	199	repo_clear(repo);
	200	return -1;
	201	}
	202
d5498e08	203	int repo_submodule_init(struct repository *subrepo,
96dc883b	204	struct repository *superproject,
8eb8dcf9 JT	205	const char *path,
8eb8dcf9 JT	206	const struct object_id *treeish_name)
96dc883b	207	{
96dc883b BW	208	struct strbuf gitdir = STRBUF_INIT;
	209	struct strbuf worktree = STRBUF_INIT;
	210	int ret = 0;
	211
8eb8dcf9 JT	212	strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
8eb8dcf9 JT	213	strbuf_repo_worktree_path(&worktree, superproject, "%s", path);
96dc883b	214
d5498e08	215	if (repo_init(subrepo, gitdir.buf, worktree.buf)) {
96dc883b	216	/*
15beaaa3	217	* If initialization fails then it may be due to the submodule
96dc883b	218	* not being populated in the superproject's worktree. Instead
15beaaa3	219	* we can try to initialize the submodule by finding it's gitdir
96dc883b BW	220	* in the superproject's 'modules' directory. In this case the
	221	* submodule would not have a worktree.
	222	*/
8eb8dcf9 JT	223	const struct submodule *sub =
	224	submodule_from_path(superproject, treeish_name, path);
	225	if (!sub) {
	226	ret = -1;
	227	goto out;
	228	}
	229
96dc883b	230	strbuf_reset(&gitdir);
ce125d43	231	submodule_name_to_gitdir(&gitdir, superproject, sub->name);
96dc883b	232
d5498e08	233	if (repo_init(subrepo, gitdir.buf, NULL)) {
96dc883b BW	234	ret = -1;
	235	goto out;
	236	}
	237	}
	238
d5498e08 SB	239	subrepo->submodule_prefix = xstrfmt("%s%s/",
	240	superproject->submodule_prefix ?
	241	superproject->submodule_prefix :
8eb8dcf9	242	"", path);
96dc883b BW	243
	244	out:
	245	strbuf_release(&gitdir);
	246	strbuf_release(&worktree);
	247	return ret;
	248	}
	249
759f3407 ÆAB	250	static void repo_clear_path_cache(struct repo_path_cache *cache)
	251	{
	252	FREE_AND_NULL(cache->squash_msg);
	253	FREE_AND_NULL(cache->squash_msg);
	254	FREE_AND_NULL(cache->merge_msg);
	255	FREE_AND_NULL(cache->merge_rr);
	256	FREE_AND_NULL(cache->merge_mode);
	257	FREE_AND_NULL(cache->merge_head);
	258	FREE_AND_NULL(cache->merge_autostash);
	259	FREE_AND_NULL(cache->auto_merge);
	260	FREE_AND_NULL(cache->fetch_head);
	261	FREE_AND_NULL(cache->shallow);
	262	}
	263
359efeff BW	264	void repo_clear(struct repository *repo)
359efeff BW	265	{
90dd04aa RS	266	FREE_AND_NULL(repo->gitdir);
90dd04aa RS	267	FREE_AND_NULL(repo->commondir);
90dd04aa RS	268	FREE_AND_NULL(repo->graft_file);
	269	FREE_AND_NULL(repo->index_file);
	270	FREE_AND_NULL(repo->worktree);
	271	FREE_AND_NULL(repo->submodule_prefix);
3b256228	272
90c62155 SB	273	raw_object_store_clear(repo->objects);
	274	FREE_AND_NULL(repo->objects);
	275
99bf115c SB	276	parsed_object_pool_clear(repo->parsed_objects);
	277	FREE_AND_NULL(repo->parsed_objects);
	278
3b256228 BW	279	if (repo->config) {
3b256228 BW	280	git_configset_clear(repo->config);
90dd04aa	281	FREE_AND_NULL(repo->config);
3b256228	282	}
639e30b5	283
bf12fcdf BW	284	if (repo->submodule_cache) {
	285	submodule_cache_free(repo->submodule_cache);
	286	repo->submodule_cache = NULL;
	287	}
	288
639e30b5 BW	289	if (repo->index) {
639e30b5 BW	290	discard_index(repo->index);
74373b5f NTND	291	if (repo->index != &the_index)
74373b5f NTND	292	FREE_AND_NULL(repo->index);
639e30b5	293	}
ef7dc2e9 JT	294
	295	if (repo->promisor_remote_config) {
	296	promisor_remote_clear(repo->promisor_remote_config);
	297	FREE_AND_NULL(repo->promisor_remote_config);
	298	}
fd3cb050 GC	299
	300	if (repo->remote_state) {
	301	remote_state_clear(repo->remote_state);
	302	FREE_AND_NULL(repo->remote_state);
	303	}
759f3407 ÆAB	304
759f3407 ÆAB	305	repo_clear_path_cache(&repo->cached_paths);
639e30b5 BW	306	}
	307
	308	int repo_read_index(struct repository *repo)
	309	{
3964fc2a DS	310	int res;
3964fc2a DS	311
6269f8ea	312	/* Complete the double-reference */
2f6b1eb7 ÆAB	313	if (!repo->index) {
2f6b1eb7 ÆAB	314	ALLOC_ARRAY(repo->index, 1);
6269f8ea ÆAB	315	index_state_init(repo->index, repo);
6269f8ea ÆAB	316	} else if (repo->index->repo != repo) {
1fd9ae51	317	BUG("repo's index should point back at itself");
6269f8ea	318	}
1fd9ae51	319
3964fc2a DS	320	res = read_index_from(repo->index, repo->index_file, repo->gitdir);
	321
	322	prepare_repo_settings(repo);
	323	if (repo->settings.command_requires_full_index)
	324	ensure_full_index(repo->index);
	325
af6a5187 EN	326	/*
	327	* If sparse checkouts are in use, check whether paths with the
	328	* SKIP_WORKTREE attribute are missing from the worktree; if not,
	329	* clear that attribute for that path.
	330	*/
	331	clear_skip_worktree_from_present_files(repo->index);
	332
3964fc2a	333	return res;
359efeff	334	}
3a95f31d NTND	335
	336	int repo_hold_locked_index(struct repository *repo,
	337	struct lock_file *lf,
	338	int flags)
	339	{
	340	if (!repo->index_file)
	341	BUG("the repo hasn't been setup");
	342	return hold_lock_file_for_update(lf, repo->index_file, flags);
	343	}