text: /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_git_worktree_h__
  #define INCLUDE_git_worktree_h__
  
  #include "common.h"
  #include "buffer.h"
  #include "types.h"
  #include "strarray.h"
  
  /**
   * @file git2/worktrees.h
   * @brief Git worktree related functions
   * @defgroup git_commit Git worktree related functions
   * @ingroup Git
   * @{
   */
  GIT_BEGIN_DECL
  
  /**
   * List names of linked working trees
   *
   * The returned list should be released with `git_strarray_free`
   * when no longer needed.
   *
   * @param out pointer to the array of working tree names
   * @param repo the repo to use when listing working trees
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_worktree_list(git_strarray *out, git_repository *repo);
  
  /**
   * Lookup a working tree by its name for a given repository
   *
   * @param out Output pointer to looked up worktree or `NULL`
   * @param repo The repository containing worktrees
   * @param name Name of the working tree to look up
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_worktree_lookup(git_worktree **out, git_repository *repo, const char *name);
  
  /**
   * Open a worktree of a given repository
   *
   * If a repository is not the main tree but a worktree, this
   * function will look up the worktree inside the parent
   * repository and create a new `git_worktree` structure.
   *
   * @param out Out-pointer for the newly allocated worktree
   * @param repo Repository to look up worktree for
   */
  GIT_EXTERN(int) git_worktree_open_from_repository(git_worktree **out, git_repository *repo);
  
  /**
   * Free a previously allocated worktree
   *
   * @param wt worktree handle to close. If NULL nothing occurs.
   */
  GIT_EXTERN(void) git_worktree_free(git_worktree *wt);
  
  /**
   * Check if worktree is valid
   *
   * A valid worktree requires both the git data structures inside
   * the linked parent repository and the linked working copy to be
   * present.
   *
   * @param wt Worktree to check
   * @return 0 when worktree is valid, error-code otherwise
   */
  GIT_EXTERN(int) git_worktree_validate(const git_worktree *wt);
  
  /**
   * Worktree add options structure
   *
   * Initialize with `GIT_WORKTREE_ADD_OPTIONS_INIT`. Alternatively, you can
   * use `git_worktree_add_options_init`.
   *
   */
  typedef struct git_worktree_add_options {
  	unsigned int version;
  
  	int lock; /**< lock newly created worktree */
      git_reference *ref; /**< reference to use for the new worktree HEAD */
      int checkout; /**< checkout the files */
  } git_worktree_add_options;
  
  #define GIT_WORKTREE_ADD_OPTIONS_VERSION 1
  #define GIT_WORKTREE_ADD_OPTIONS_INIT {GIT_WORKTREE_ADD_OPTIONS_VERSION,0,NULL,1}
  
  /**
   * Initialize git_worktree_add_options structure
   *
   * Initializes a `git_worktree_add_options` with default values. Equivalent to
   * creating an instance with `GIT_WORKTREE_ADD_OPTIONS_INIT`.
   *
   * @param opts The `git_worktree_add_options` struct to initialize.
   * @param version The struct version; pass `GIT_WORKTREE_ADD_OPTIONS_VERSION`.
   * @return Zero on success; -1 on failure.
   */
  GIT_EXTERN(int) git_worktree_add_options_init(git_worktree_add_options *opts,
  	unsigned int version);
  
  /**
   * Add a new working tree
   *
   * Add a new working tree for the repository, that is create the
   * required data structures inside the repository and check out
   * the current HEAD at `path`
   *
   * @param out Output pointer containing new working tree
   * @param repo Repository to create working tree for
   * @param name Name of the working tree
   * @param path Path to create working tree at
   * @param opts Options to modify default behavior. May be NULL
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_worktree_add(git_worktree **out, git_repository *repo,
  	const char *name, const char *path,
  	const git_worktree_add_options *opts);
  
  /**
   * Lock worktree if not already locked
   *
   * Lock a worktree, optionally specifying a reason why the linked
   * working tree is being locked.
   *
   * @param wt Worktree to lock
   * @param reason Reason why the working tree is being locked
   * @return 0 on success, non-zero otherwise
   */
  GIT_EXTERN(int) git_worktree_lock(git_worktree *wt, const char *reason);
  
  /**
   * Unlock a locked worktree
   *
   * @param wt Worktree to unlock
   * @return 0 on success, 1 if worktree was not locked, error-code
   *  otherwise
   */
  GIT_EXTERN(int) git_worktree_unlock(git_worktree *wt);
  
  /**
   * Check if worktree is locked
   *
   * A worktree may be locked if the linked working tree is stored
   * on a portable device which is not available.
   *
   * @param reason Buffer to store reason in. If NULL no reason is stored.
   * @param wt Worktree to check
   * @return 0 when the working tree not locked, a value greater
   *  than zero if it is locked, less than zero if there was an
   *  error
   */
  GIT_EXTERN(int) git_worktree_is_locked(git_buf *reason, const git_worktree *wt);
  
  /**
   * Retrieve the name of the worktree
   *
   * @param wt Worktree to get the name for
   * @return The worktree's name. The pointer returned is valid for the
   *  lifetime of the git_worktree
   */
  GIT_EXTERN(const char *) git_worktree_name(const git_worktree *wt);
  
  /**
   * Retrieve the filesystem path for the worktree
   *
   * @param wt Worktree to get the path for
   * @return The worktree's filesystem path. The pointer returned
   *  is valid for the lifetime of the git_worktree.
   */
  GIT_EXTERN(const char *) git_worktree_path(const git_worktree *wt);
  
  /**
   * Flags which can be passed to git_worktree_prune to alter its
   * behavior.
   */
  typedef enum {
  	/* Prune working tree even if working tree is valid */
  	GIT_WORKTREE_PRUNE_VALID = 1u << 0,
  	/* Prune working tree even if it is locked */
  	GIT_WORKTREE_PRUNE_LOCKED = 1u << 1,
  	/* Prune checked out working tree */
  	GIT_WORKTREE_PRUNE_WORKING_TREE = 1u << 2,
  } git_worktree_prune_t;
  
  /**
   * Worktree prune options structure
   *
   * Initialize with `GIT_WORKTREE_PRUNE_OPTIONS_INIT`. Alternatively, you can
   * use `git_worktree_prune_options_init`.
   *
   */
  typedef struct git_worktree_prune_options {
  	unsigned int version;
  
  	/** A combination of `git_worktree_prune_t` */
  	uint32_t flags;
  } git_worktree_prune_options;
  
  #define GIT_WORKTREE_PRUNE_OPTIONS_VERSION 1
  #define GIT_WORKTREE_PRUNE_OPTIONS_INIT {GIT_WORKTREE_PRUNE_OPTIONS_VERSION,0}
  
  /**
   * Initialize git_worktree_prune_options structure
   *
   * Initializes a `git_worktree_prune_options` with default values. Equivalent to
   * creating an instance with `GIT_WORKTREE_PRUNE_OPTIONS_INIT`.
   *
   * @param opts The `git_worktree_prune_options` struct to initialize.
   * @param version The struct version; pass `GIT_WORKTREE_PRUNE_OPTIONS_VERSION`.
   * @return Zero on success; -1 on failure.
   */
  GIT_EXTERN(int) git_worktree_prune_options_init(
  	git_worktree_prune_options *opts,
  	unsigned int version);
  
  /**
   * Is the worktree prunable with the given options?
   *
   * A worktree is not prunable in the following scenarios:
   *
   * - the worktree is linking to a valid on-disk worktree. The
   *   `valid` member will cause this check to be ignored.
   * - the worktree is locked. The `locked` flag will cause this
   *   check to be ignored.
   *
   * If the worktree is not valid and not locked or if the above
   * flags have been passed in, this function will return a
   * positive value.
   */
  GIT_EXTERN(int) git_worktree_is_prunable(git_worktree *wt,
  	git_worktree_prune_options *opts);
  
  /**
   * Prune working tree
   *
   * Prune the working tree, that is remove the git data
   * structures on disk. The repository will only be pruned of
   * `git_worktree_is_prunable` succeeds.
   *
   * @param wt Worktree to prune
   * @param opts Specifies which checks to override. See
   *        `git_worktree_is_prunable`. May be NULL
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_worktree_prune(git_worktree *wt,
  	git_worktree_prune_options *opts);
  
  /** @} */
  GIT_END_DECL
  #endif
  