[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 "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();

	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);

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