repository.h 4.43 KB
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#ifndef REPOSITORY_H
#define REPOSITORY_H

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#include "path.h"

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struct config_set;
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struct git_hash_algo;
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struct index_state;
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struct lock_file;
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struct pathspec;
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struct raw_object_store;
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struct submodule_cache;
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struct repository {
	/* Environment */
	/*
	 * Path to the git directory.
	 * Cannot be NULL after initialization.
	 */
	char *gitdir;

	/*
	 * Path to the common git directory.
	 * Cannot be NULL after initialization.
	 */
	char *commondir;

	/*
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	 * Holds any information related to accessing the raw object content.
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	 */
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	struct raw_object_store *objects;
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	/*
	 * All objects in this repository that have been parsed. This structure
	 * owns all objects it references, so users of "struct object *"
	 * generally do not need to free them; instead, when a repository is no
	 * longer used, call parsed_object_pool_clear() on this structure, which
	 * is called by the repositories repo_clear on its desconstruction.
	 */
	struct parsed_object_pool *parsed_objects;

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	/* The store in which the refs are held. */
	struct ref_store *refs;

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	/*
	 * Contains path to often used file names.
	 */
	struct path_cache cached_paths;

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	/*
	 * Path to the repository's graft file.
	 * Cannot be NULL after initialization.
	 */
	char *graft_file;

	/*
	 * Path to the current worktree's index file.
	 * Cannot be NULL after initialization.
	 */
	char *index_file;

	/*
	 * Path to the working directory.
	 * A NULL value indicates that there is no working directory.
	 */
	char *worktree;

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	/*
	 * Path from the root of the top-level superproject down to this
	 * repository.  This is only non-NULL if the repository is initialized
	 * as a submodule of another repository.
	 */
	char *submodule_prefix;

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	/* Subsystems */
	/*
	 * Repository's config which contains key-value pairs from the usual
	 * set of config files (i.e. repo specific .git/config, user wide
	 * ~/.gitconfig, XDG config file and the global /etc/gitconfig)
	 */
	struct config_set *config;

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	/* Repository's submodule config as defined by '.gitmodules' */
	struct submodule_cache *submodule_cache;

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	/*
	 * Repository's in-memory index.
	 * 'repo_read_index()' can be used to populate 'index'.
	 */
	struct index_state *index;

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	/* Repository's current hash algorithm, as serialized on disk. */
	const struct git_hash_algo *hash_algo;

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	/* A unique-id for tracing purposes. */
	int trace2_repo_id;

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	/* Configurations */

	/* Indicate if a repository has a different 'commondir' from 'gitdir' */
	unsigned different_commondir:1;
};

extern struct repository *the_repository;

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/*
 * Define a custom repository layout. Any field can be NULL, which
 * will default back to the path according to the default layout.
 */
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struct set_gitdir_args {
	const char *commondir;
	const char *object_dir;
	const char *graft_file;
	const char *index_file;
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	const char *alternate_db;
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};

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void repo_set_gitdir(struct repository *repo, const char *root,
		     const struct set_gitdir_args *extra_args);
void repo_set_worktree(struct repository *repo, const char *path);
void repo_set_hash_algo(struct repository *repo, int algo);
void initialize_the_repository(void);
int repo_init(struct repository *r, const char *gitdir, const char *worktree);
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/*
 * Initialize the repository 'subrepo' as the submodule given by the
 * struct submodule 'sub' in parent repository 'superproject'.
 * Return 0 upon success and a non-zero value upon failure, which may happen
 * if the submodule is not found, or 'sub' is NULL.
 */
struct submodule;
int repo_submodule_init(struct repository *subrepo,
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			struct repository *superproject,
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			const struct submodule *sub);
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void repo_clear(struct repository *repo);
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/*
 * Populates the repository's index from its index_file, an index struct will
 * be allocated if needed.
 *
 * Return the number of index entries in the populated index or a value less
 * than zero if an error occured.  If the repository's index has already been
 * populated then the number of entries will simply be returned.
 */
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int repo_read_index(struct repository *repo);
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int repo_hold_locked_index(struct repository *repo,
			   struct lock_file *lf,
			   int flags);
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int repo_read_index_preload(struct repository *,
			    const struct pathspec *pathspec,
			    unsigned refresh_flags);
int repo_read_index_unmerged(struct repository *);
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/*
 * Opportunistically update the index but do not complain if we can't.
 * The lockfile is always committed or rolled back.
 */
void repo_update_index_if_able(struct repository *, struct lock_file *);

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#endif /* REPOSITORY_H */