#![allow(missing_docs)]use std::path::{Path, PathBuf}; use bstr::{BStr, ByteSlice};use gix_hash::oid; use super::Cache;use crate::PathIdMapping; /// Various aggregate numbers collected from when the corresponding [`Cache`] was instantiated.#[derive(Default, Clone, Copy, Debug)]#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]pub struct Statistics {    /// The amount of platforms created to do further matching.    pub platforms: usize,    /// Information about the stack delegate.    pub delegate: delegate::Statistics,    /// Information about attributes    pub attributes: state::attributes::Statistics,    /// Information about the ignore stack    pub ignore: state::ignore::Statistics,} #[derive(Clone)]pub enum State {    /// Useful for checkout where directories need creation, but we need to access attributes as well.    CreateDirectoryAndAttributesStack {        /// If there is a symlink or a file in our path, try to unlink it before creating the directory.        unlink_on_collision: bool,        /// State to handle attribute information        attributes: state::Attributes,    },    /// Used when adding files, requiring access to both attributes and ignore information, for example during add operations.    AttributesAndIgnoreStack {        /// State to handle attribute information        attributes: state::Attributes,        /// State to handle exclusion information        ignore: state::Ignore,    },    /// Used when providing worktree status information.    IgnoreStack(state::Ignore),} #[must_use]pub struct Platform<'a> {    parent: &'a Cache,    is_dir: Option<bool>,} /// Initializationimpl Cache {    /// Create a new instance with `worktree_root` being the base for all future paths we match.    /// `state` defines the capabilities of the cache.    /// The `case` configures attribute and exclusion case sensitivity at *query time*, which should match the case that    /// `state` might be configured with.    /// `buf` is used when reading files, and `id_mappings` should have been created with [`State::id_mappings_from_index()`].    pub fn new(        worktree_root: impl Into<PathBuf>,        state: State,        case: gix_glob::pattern::Case,        buf: Vec<u8>,        id_mappings: Vec<PathIdMapping>,    ) -> Self {        let root = worktree_root.into();        Cache {            stack: gix_fs::Stack::new(root),            state,            case,            buf,            id_mappings,            statistics: Statistics::default(),        }    }} /// Entry points for attribute queryimpl Cache {    /// Append the `relative` path to the root directory of the cache and efficiently create leading directories, while assuring that no    /// symlinks are in that path.    /// Unless `is_dir` is known with `Some(…)`, then `relative` points to a directory itself in which case the entire resulting    /// path is created as directory. If it's not known it is assumed to be a file.    /// `find` maybe used to lookup objects from an [id mapping][crate::cache::State::id_mappings_from_index()], with mappnigs    ///    /// Provide access to cached information for that `relative` path via the returned platform.    pub fn at_path<Find, E>(        &mut self,        relative: impl AsRef<Path>,        is_dir: Option<bool>,        find: Find,    ) -> std::io::Result<Platform<'_>>    where        Find: for<'a> FnMut(&oid, &'a mut Vec<u8>) -> Result<gix_object::BlobRef<'a>, E>,        E: std::error::Error + Send + Sync + 'static,    {        self.statistics.platforms += 1;        let mut delegate = StackDelegate {            state: &mut self.state,            buf: &mut self.buf,            is_dir: is_dir.unwrap_or(false),            id_mappings: &self.id_mappings,            find,            case: self.case,            statistics: &mut self.statistics,        };        self.stack.make_relative_path_current(relative, &mut delegate)?;        Ok(Platform { parent: self, is_dir })    }     /// Obtain a platform for lookups from a repo-`relative` path, typically obtained from an index entry. `is_dir` should reflect    /// whether it's a directory or not, or left at `None` if unknown.    /// `find` maybe used to lookup objects from an [id mapping][crate::cache::State::id_mappings_from_index()].    /// All effects are similar to [`at_path()`][Self::at_path()].    ///    /// If `relative` ends with `/` and `is_dir` is `None`, it is automatically assumed to be a directory.    ///    /// ### Panics    ///    /// on illformed UTF8 in `relative`    pub fn at_entry<'r, Find, E>(        &mut self,        relative: impl Into<&'r BStr>,        is_dir: Option<bool>,        find: Find,    ) -> std::io::Result<Platform<'_>>    where        Find: for<'a> FnMut(&oid, &'a mut Vec<u8>) -> Result<gix_object::BlobRef<'a>, E>,        E: std::error::Error + Send + Sync + 'static,    {        let relative = relative.into();        let relative_path = gix_path::from_bstr(relative);         self.at_path(            relative_path,            is_dir.or_else(|| relative.ends_with_str("/").then_some(true)),            find,        )    }} /// Mutationimpl Cache {    /// Reset the statistics after returning them.    pub fn take_statistics(&mut self) -> Statistics {        std::mem::take(&mut self.statistics)    }     /// Return our state for applying changes.    pub fn state_mut(&mut self) -> &mut State {        &mut self.state    }} /// Accessimpl Cache {    /// Return the statistics we gathered thus far.    pub fn statistics(&self) -> &Statistics {        &self.statistics    }    /// Return the state for introspection.    pub fn state(&self) -> &State {        &self.state    }     /// Return the base path against which all entries or paths should be relative to when querying.    ///    /// Note that this path _may_ not be canonicalized.    pub fn base(&self) -> &Path {        self.stack.root()    }} ///pub mod delegate;use delegate::StackDelegate; mod platform;///pub mod state;