[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_COMPATIBILITY_MACROS
#include "cache.h"
#include "repository.h"
#include "object-store.h"
#include "config.h"
#include "object.h"
#include "lockfile.h"
#include "remote.h"
#include "submodule-config.h"
#include "sparse-index.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();

	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");

	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);

	/* 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;
}

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);
	}
}

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

	if (!repo->index)
		CALLOC_ARRAY(repo->index, 1);

	/* Complete the double-reference */
	if (!repo->index->repo)
		repo->index->repo = 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);

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