[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 "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);

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