[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");

	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);

	/* 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);

	/*
	 * 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	*/
	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
ecd81dfc NS	85	repo->objects->odb->disable_ref_updates = o->disable_ref_updates;
ecd81dfc NS	86
90c62155 SB	87	free(repo->objects->alternate_db);
90c62155 SB	88	repo->objects->alternate_db = xstrdup_or_null(o->alternate_db);
357a03eb NTND	89	expand_base_dir(&repo->graft_file, o->graft_file,
	90	repo->commondir, "info/grafts");
	91	expand_base_dir(&repo->index_file, o->index_file,
	92	repo->gitdir, "index");
359efeff BW	93	}
359efeff BW	94
78a67668	95	void repo_set_hash_algo(struct repository *repo, int hash_algo)
	96	{
	97	repo->hash_algo = &hash_algos[hash_algo];
	98	}
	99
359efeff BW	100	/*
	101	* Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
	102	* Return 0 upon success and a non-zero value upon failure.
	103	*/
	104	static int repo_init_gitdir(struct repository repo, const char gitdir)
	105	{
	106	int ret = 0;
	107	int error = 0;
	108	char *abspath = NULL;
	109	const char *resolved_gitdir;
357a03eb	110	struct set_gitdir_args args = { NULL };
359efeff BW	111
	112	abspath = real_pathdup(gitdir, 0);
	113	if (!abspath) {
	114	ret = -1;
	115	goto out;
	116	}
	117
	118	/* 'gitdir' must reference the gitdir directly */
	119	resolved_gitdir = resolve_gitdir_gently(abspath, &error);
	120	if (!resolved_gitdir) {
	121	ret = -1;
	122	goto out;
	123	}
	124
357a03eb	125	repo_set_gitdir(repo, resolved_gitdir, &args);
359efeff BW	126
	127	out:
	128	free(abspath);
	129	return ret;
	130	}
	131
	132	void repo_set_worktree(struct repository repo, const char path)
	133	{
	134	repo->worktree = real_pathdup(path, 1);
ee4512ed JH	135
ee4512ed JH	136	trace2_def_repo(repo);
359efeff BW	137	}
	138
	139	static int read_and_verify_repository_format(struct repository_format *format,
	140	const char *commondir)
	141	{
	142	int ret = 0;
	143	struct strbuf sb = STRBUF_INIT;
	144
	145	strbuf_addf(&sb, "%s/config", commondir);
	146	read_repository_format(format, sb.buf);
	147	strbuf_reset(&sb);
	148
	149	if (verify_repository_format(format, &sb) < 0) {
	150	warning("%s", sb.buf);
	151	ret = -1;
	152	}
	153
	154	strbuf_release(&sb);
	155	return ret;
	156	}
	157
	158	/*
	159	* Initialize 'repo' based on the provided 'gitdir'.
	160	* Return 0 upon success and a non-zero value upon failure.
	161	*/
da62f786 SB	162	int repo_init(struct repository *repo,
	163	const char *gitdir,
	164	const char *worktree)
359efeff	165	{
e8805af1	166	struct repository_format format = REPOSITORY_FORMAT_INIT;
359efeff BW	167	memset(repo, 0, sizeof(*repo));
359efeff BW	168
90c62155	169	repo->objects = raw_object_store_new();
99bf115c	170	repo->parsed_objects = parsed_object_pool_new();
fd3cb050	171	repo->remote_state = remote_state_new();
90c62155	172
359efeff BW	173	if (repo_init_gitdir(repo, gitdir))
	174	goto error;
	175
	176	if (read_and_verify_repository_format(&format, repo->commondir))
	177	goto error;
	178
78a67668	179	repo_set_hash_algo(repo, format.hash_algo);
78a67668	180
ebaf3bcf JT	181	/* take ownership of format.partial_clone */
	182	repo->repository_format_partial_clone = format.partial_clone;
	183	format.partial_clone = NULL;
	184
359efeff BW	185	if (worktree)
	186	repo_set_worktree(repo, worktree);
	187
e8805af1	188	clear_repository_format(&format);
359efeff BW	189	return 0;
	190
	191	error:
	192	repo_clear(repo);
	193	return -1;
	194	}
	195
d5498e08	196	int repo_submodule_init(struct repository *subrepo,
96dc883b	197	struct repository *superproject,
8eb8dcf9 JT	198	const char *path,
8eb8dcf9 JT	199	const struct object_id *treeish_name)
96dc883b	200	{
96dc883b BW	201	struct strbuf gitdir = STRBUF_INIT;
	202	struct strbuf worktree = STRBUF_INIT;
	203	int ret = 0;
	204
8eb8dcf9 JT	205	strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
8eb8dcf9 JT	206	strbuf_repo_worktree_path(&worktree, superproject, "%s", path);
96dc883b	207
d5498e08	208	if (repo_init(subrepo, gitdir.buf, worktree.buf)) {
96dc883b	209	/*
15beaaa3	210	* If initialization fails then it may be due to the submodule
96dc883b	211	* not being populated in the superproject's worktree. Instead
15beaaa3	212	* we can try to initialize the submodule by finding it's gitdir
96dc883b BW	213	* in the superproject's 'modules' directory. In this case the
	214	* submodule would not have a worktree.
	215	*/
8eb8dcf9 JT	216	const struct submodule *sub =
	217	submodule_from_path(superproject, treeish_name, path);
	218	if (!sub) {
	219	ret = -1;
	220	goto out;
	221	}
	222
96dc883b	223	strbuf_reset(&gitdir);
ce125d43	224	submodule_name_to_gitdir(&gitdir, superproject, sub->name);
96dc883b	225
d5498e08	226	if (repo_init(subrepo, gitdir.buf, NULL)) {
96dc883b BW	227	ret = -1;
	228	goto out;
	229	}
	230	}
	231
d5498e08 SB	232	subrepo->submodule_prefix = xstrfmt("%s%s/",
	233	superproject->submodule_prefix ?
	234	superproject->submodule_prefix :
8eb8dcf9	235	"", path);
96dc883b BW	236
	237	out:
	238	strbuf_release(&gitdir);
	239	strbuf_release(&worktree);
	240	return ret;
	241	}
	242
359efeff BW	243	void repo_clear(struct repository *repo)
359efeff BW	244	{
90dd04aa RS	245	FREE_AND_NULL(repo->gitdir);
90dd04aa RS	246	FREE_AND_NULL(repo->commondir);
90dd04aa RS	247	FREE_AND_NULL(repo->graft_file);
	248	FREE_AND_NULL(repo->index_file);
	249	FREE_AND_NULL(repo->worktree);
	250	FREE_AND_NULL(repo->submodule_prefix);
3b256228	251
90c62155 SB	252	raw_object_store_clear(repo->objects);
	253	FREE_AND_NULL(repo->objects);
	254
99bf115c SB	255	parsed_object_pool_clear(repo->parsed_objects);
	256	FREE_AND_NULL(repo->parsed_objects);
	257
3b256228 BW	258	if (repo->config) {
3b256228 BW	259	git_configset_clear(repo->config);
90dd04aa	260	FREE_AND_NULL(repo->config);
3b256228	261	}
639e30b5	262
bf12fcdf BW	263	if (repo->submodule_cache) {
	264	submodule_cache_free(repo->submodule_cache);
	265	repo->submodule_cache = NULL;
	266	}
	267
639e30b5 BW	268	if (repo->index) {
639e30b5 BW	269	discard_index(repo->index);
74373b5f NTND	270	if (repo->index != &the_index)
74373b5f NTND	271	FREE_AND_NULL(repo->index);
639e30b5	272	}
ef7dc2e9 JT	273
	274	if (repo->promisor_remote_config) {
	275	promisor_remote_clear(repo->promisor_remote_config);
	276	FREE_AND_NULL(repo->promisor_remote_config);
	277	}
fd3cb050 GC	278
	279	if (repo->remote_state) {
	280	remote_state_clear(repo->remote_state);
	281	FREE_AND_NULL(repo->remote_state);
	282	}
639e30b5 BW	283	}
	284
	285	int repo_read_index(struct repository *repo)
	286	{
3964fc2a DS	287	int res;
3964fc2a DS	288
639e30b5	289	if (!repo->index)
ca56dadb	290	CALLOC_ARRAY(repo->index, 1);
639e30b5	291
1fd9ae51 DS	292	/* Complete the double-reference */
	293	if (!repo->index->repo)
	294	repo->index->repo = repo;
	295	else if (repo->index->repo != repo)
	296	BUG("repo's index should point back at itself");
	297
3964fc2a DS	298	res = read_index_from(repo->index, repo->index_file, repo->gitdir);
	299
	300	prepare_repo_settings(repo);
	301	if (repo->settings.command_requires_full_index)
	302	ensure_full_index(repo->index);
	303
af6a5187 EN	304	/*
	305	* If sparse checkouts are in use, check whether paths with the
	306	* SKIP_WORKTREE attribute are missing from the worktree; if not,
	307	* clear that attribute for that path.
	308	*/
	309	clear_skip_worktree_from_present_files(repo->index);
	310
3964fc2a	311	return res;
359efeff	312	}
3a95f31d NTND	313
	314	int repo_hold_locked_index(struct repository *repo,
	315	struct lock_file *lf,
	316	int flags)
	317	{
	318	if (!repo->index_file)
	319	BUG("the repo hasn't been setup");
	320	return hold_lock_file_for_update(lf, repo->index_file, flags);
	321	}