//! A crate for handling the references stored in various formats in a git repository.//!//! References are also called _refs_ which are used interchangeably.//!//! Refs are the way to keep track of objects and come in two flavors.//!//! * symbolic refs are pointing to another reference//! * peeled refs point to the an object by its [ObjectId][git_hash::ObjectId]//!//! They can be identified by a relative path and stored in various flavors.//!//! * **files**//!   * **[loose][file::Store]**//!     * one reference maps to a file on disk//!   * **packed**//!     * references are stored in a single human-readable file, along with their targets if they are symbolic.//!//! ## Feature Flags#![cfg_attr(    feature = "document-features",    cfg_attr(doc, doc = ::document_features::document_features!()))]#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]#![deny(missing_docs, rust_2018_idioms, unsafe_code)] use std::borrow::Cow; use git_hash::{oid, ObjectId};pub use git_object::bstr;use git_object::bstr::{BStr, BString}; #[path = "store/mod.rs"]mod store_impl;pub use store_impl::{file, packed}; mod fullname;///pub mod name;///pub mod namespace;///pub mod transaction; mod parse;mod raw; pub use raw::Reference; mod target; ///pub mod log; ///pub mod peel; ///pub mod store {    /// The way a file store handles the reflog    #[derive(Debug, PartialOrd, PartialEq, Ord, Eq, Hash, Clone, Copy)]    pub enum WriteReflog {        /// Always write the reflog for all references for ref edits, unconditionally.        Always,        /// Write a ref log for ref edits according to the standard rules.        Normal,        /// Never write a ref log.        Disable,    }     impl Default for WriteReflog {        fn default() -> Self {            WriteReflog::Normal        }    }     /// A thread-local handle for interacting with a [`Store`][crate::Store] to find and iterate references.    #[derive(Clone)]    #[allow(dead_code)]    pub(crate) struct Handle {        /// A way to access shared state with the requirement that interior mutability doesn't leak or is incorporated into error types        /// if it could. The latter can't happen if references to said internal aren't ever returned.        state: handle::State,    }     #[allow(dead_code)]    pub(crate) enum State {        Loose { store: file::Store },    }     pub(crate) mod general;     ///    #[path = "general/handle/mod.rs"]    mod handle;    pub use handle::find;     use crate::file;} /// The git reference store./// TODO: Figure out if handles are needed at all, which depends on the ref-table implementation.#[allow(dead_code)]pub(crate) struct Store {    inner: store::State,} /// Indicate that the given BString is a validate reference name or path that can be used as path on disk or written as target/// of a symbolic reference#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub struct FullName(pub(crate) BString); /// A validated and potentially partial reference name - it can safely be used for common operations.#[derive(Hash, Debug, PartialEq, Eq, Ord, PartialOrd)]#[repr(transparent)]pub struct FullNameRef(BStr); /// A validated complete and fully qualified reference name, safe to use for all operations.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]pub struct PartialNameCow<'a>(Cow<'a, BStr>); /// A validated complete and fully qualified referenced reference name, safe to use for all operations.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd)]#[repr(transparent)]pub struct PartialNameRef(BStr); /// A validated complete and fully qualified owned reference name, safe to use for all operations.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd)]pub struct PartialName(BString); /// A _validated_ prefix for references to act as a namespace.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]pub struct Namespace(BString); /// Denotes the kind of reference.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum Kind {    /// A ref that points to an object id    Peeled,    /// A ref that points to another reference, adding a level of indirection.    ///    /// It can be resolved to an id using the [`peel_in_place_to_id()`][`crate::file::ReferenceExt::peel_to_id_in_place()`] method.    Symbolic,} /// The various known categories of references.////// This translates into a prefix containing all references of a given category.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]pub enum Category<'a> {    /// A tag in `refs/tags`    Tag,    /// A branch in `refs/heads`    LocalBranch,    /// A branch in `refs/remotes`    RemoteBranch,    /// A tag in `refs/notes`    Note,    /// Something outside of `ref/` in the current worktree, typically `HEAD`.    PseudoRef,    /// A `PseudoRef`, but referenced so that it will always refer to the main worktree by    /// prefixing it with `main-worktree/`.    MainPseudoRef,    /// Any reference that is prefixed with `main-worktree/refs/`    MainRef,    /// A `PseudoRef` in another _linked_ worktree, never in the main one, like `worktrees/<id>/HEAD`.    LinkedPseudoRef {        /// The name of the worktree.        name: &'a BStr,    },    /// Any reference that is prefixed with `worktrees/<id>/refs/`.    LinkedRef {        /// The name of the worktree.        name: &'a BStr,    },    /// A ref that is private to each worktree (_linked_ or _main_), with `refs/bisect/` prefix    Bisect,    /// A ref that is private to each worktree (_linked_ or _main_), with `refs/rewritten/` prefix    Rewritten,    /// A ref that is private to each worktree (_linked_ or _main_), with `refs/worktree/` prefix    WorktreePrivate,    // REF_TYPE_NORMAL,	  /* normal/shared refs inside refs/        */} /// Denotes a ref target, equivalent to [`Kind`], but with mutable data.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum Target {    /// A ref that points to an object id    Peeled(ObjectId),    /// A ref that points to another reference by its validated name, adding a level of indirection.    ///    /// Note that this is an extension of gitoxide which will be helpful in logging all reference changes.    Symbolic(FullName),} /// Denotes a ref target, equivalent to [`Kind`], but with immutable data.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]pub enum TargetRef<'a> {    /// A ref that points to an object id    Peeled(&'a oid),    /// A ref that points to another reference by its validated name, adding a level of indirection.    Symbolic(&'a FullNameRef),}