use std::{cell::RefCell, path::PathBuf}; use git_hash::ObjectId; use crate::head; /// The kind of repository.#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]pub enum Kind {    /// A submodule worktree, whose `git` repository lives in `.git/modules/**/<name>` of the parent repository.    Submodule,    /// A bare repository does not have a work tree, that is files on disk beyond the `git` repository itself.    Bare,    /// A `git` repository along with a checked out files in a work tree.    WorkTree {        /// If true, this is the git dir associated with this _linked_ worktree, otherwise it is a repository with _main_ worktree.        is_linked: bool,    },} /// A worktree checkout containing the files of the repository in consumable form.pub struct Worktree<'repo> {    pub(crate) parent: &'repo Repository,    /// The root path of the checkout.    pub(crate) path: &'repo std::path::Path,} /// The head reference, as created from looking at `.git/HEAD`, able to represent all of its possible states.////// Note that like [`Reference`], this type's data is snapshot of persisted state on disk.#[derive(Clone)]pub struct Head<'repo> {    /// One of various possible states for the HEAD reference    pub kind: head::Kind,    pub(crate) repo: &'repo Repository,} /// An [ObjectId] with access to a repository.#[derive(Clone, Copy)]pub struct Id<'r> {    /// The actual object id    pub(crate) inner: ObjectId,    pub(crate) repo: &'r Repository,} /// A decoded object with a reference to its owning repository.pub struct Object<'repo> {    /// The id of the object    pub id: ObjectId,    /// The kind of the object    pub kind: git_object::Kind,    /// The fully decoded object data    pub data: Vec<u8>,    pub(crate) repo: &'repo Repository,} impl<'a> Drop for Object<'a> {    fn drop(&mut self) {        self.repo.reuse_buffer(&mut self.data);    }} /// A decoded tree object with access to its owning repository.pub struct Tree<'repo> {    /// The id of the tree    pub id: ObjectId,    /// The fully decoded tree data    pub data: Vec<u8>,    pub(crate) repo: &'repo Repository,} impl<'a> Drop for Tree<'a> {    fn drop(&mut self) {        self.repo.reuse_buffer(&mut self.data);    }} /// A decoded tag object with access to its owning repository.pub struct Tag<'repo> {    /// The id of the tree    pub id: ObjectId,    /// The fully decoded tag data    pub data: Vec<u8>,    pub(crate) repo: &'repo Repository,} impl<'a> Drop for Tag<'a> {    fn drop(&mut self) {        self.repo.reuse_buffer(&mut self.data);    }} /// A decoded commit object with access to its owning repository.pub struct Commit<'repo> {    /// The id of the commit    pub id: ObjectId,    /// The fully decoded commit data    pub data: Vec<u8>,    pub(crate) repo: &'repo Repository,} impl<'a> Drop for Commit<'a> {    fn drop(&mut self) {        self.repo.reuse_buffer(&mut self.data);    }} /// A detached, self-contained object, without access to its source repository.////// Use it if an `ObjectRef` should be sent over thread boundaries or stored in collections.#[derive(Clone)]pub struct ObjectDetached {    /// The id of the object    pub id: ObjectId,    /// The kind of the object    pub kind: git_object::Kind,    /// The fully decoded object data    pub data: Vec<u8>,} /// A reference that points to an object or reference, with access to its source repository.////// Note that these are snapshots and won't recognize if they are stale.#[derive(Clone)]pub struct Reference<'r> {    /// The actual reference data    pub inner: git_ref::Reference,    pub(crate) repo: &'r Repository,} /// A thread-local handle to interact with a repository from a single thread.////// It is `Send` but **not** `Sync` - for the latter you can convert it `to_sync()`./// Note that it clones itself so that it is empty, requiring the user to configure each clone separately, specifically/// and explicitly. This is to have the fastest-possible default configuration available by default, but allow/// those who experiment with workloads to get speed boosts of 2x or more.pub struct Repository {    /// A ref store with shared ownership (or the equivalent of it).    pub refs: crate::RefStore,    /// A way to access objects.    pub objects: crate::OdbHandle,     pub(crate) work_tree: Option<PathBuf>,    /// The path to the resolved common directory if this is a linked worktree repository or it is otherwise set.    pub(crate) common_dir: Option<PathBuf>,    /// A free-list of re-usable object backing buffers    pub(crate) bufs: RefCell<Vec<Vec<u8>>>,    /// A pre-assembled selection of often-accessed configuration values for quick access.    pub(crate) config: crate::config::Cache,    /// the options obtained when instantiating this repository.    ///    /// Particularly useful when following linked worktrees and instantiating new equally configured worktree repositories.    pub(crate) options: crate::open::Options,    pub(crate) index: crate::worktree::IndexStorage,} /// An instance with access to everything a git repository entails, best imagined as container implementing `Sync + Send` for _most_/// for system resources required to interact with a `git` repository which are loaded in once the instance is created.////// Use this type to reference it in a threaded context for creation the creation of a thread-local [`Repositories`][Repository].////// Note that this type purposefully isn't very useful until it is converted into a thread-local repository with `to_thread_local()`,/// it's merely meant to be able to exist in a `Sync` context.pub struct ThreadSafeRepository {    /// A store for references to point at objects    pub refs: crate::RefStore,    /// A store for objects that contain data    #[cfg(feature = "unstable")]    pub objects: git_features::threading::OwnShared<git_odb::Store>,    #[cfg(not(feature = "unstable"))]    pub(crate) objects: git_features::threading::OwnShared<git_odb::Store>,    /// The path to the worktree at which to find checked out files    pub work_tree: Option<PathBuf>,    /// The path to the common directory if this is a linked worktree repository or it is otherwise set.    pub common_dir: Option<PathBuf>,    pub(crate) config: crate::config::Cache,    /// options obtained when instantiating this repository for use when following linked worktrees.    pub(crate) linked_worktree_options: crate::open::Options,    /// The index of this instances worktree.    pub(crate) index: crate::worktree::IndexStorage,}