//! Algorithms for diffing various git object types and for generating patches, highly optimized for performance.//! ## Feature Flags#![cfg_attr(    all(doc, feature = "document-features"),    doc = ::document_features::document_features!())]#![cfg_attr(all(doc, feature = "document-features"), feature(doc_cfg))]#![deny(missing_docs, rust_2018_idioms)]#![forbid(unsafe_code)] /// Re-export for use in public API.#[cfg(feature = "blob")]pub use gix_command as command;/// Re-export for use in public API.#[cfg(feature = "blob")]pub use gix_object as object; /// A structure to capture how to perform rename and copy tracking, used by the [rewrites::Tracker].#[derive(Debug, Copy, Clone, PartialEq)]#[cfg(feature = "blob")]pub struct Rewrites {    /// If `Some(…)`, also find copies. `None` is the default which does not try to detect copies at all.    ///    /// Note that this is an even more expensive operation than detecting renames stemming from additions and deletions    /// as the resulting set to search through is usually larger.    pub copies: Option<rewrites::Copies>,    /// The percentage of similarity needed for files to be considered renamed, defaulting to `Some(0.5)`.    /// This field is similar to `git diff -M50%`.    ///    /// If `None`, files are only considered equal if their content matches 100%.    /// Note that values greater than 1.0 have no different effect than 1.0.    pub percentage: Option<f32>,    /// The amount of files to consider for fuzzy rename or copy tracking. Defaults to 1000, meaning that only 1000*1000    /// combinations can be tested for fuzzy matches, i.e. the ones that try to find matches by comparing similarity.    /// If 0, there is no limit.    ///    /// If the limit would not be enough to test the entire set of combinations, the algorithm will trade in precision and not    /// run the fuzzy version of identity tests at all. That way results are never partial.    pub limit: usize,     /// If `true`, empty blobs will be tracked. If `false`, they do not participate in rename tracking.    ///    /// Leaving this off usually leads to better results as empty files don't have a unique-enough identity.    pub track_empty: bool,} /// Contains a [Tracker](rewrites::Tracker) to detect rewrites.#[cfg(feature = "blob")]pub mod rewrites; ///pub mod tree;pub use tree::function::diff as tree; ///#[cfg(feature = "blob")]pub mod tree_with_rewrites;#[cfg(feature = "blob")]pub use tree_with_rewrites::function::diff as tree_with_rewrites; ///#[cfg(feature = "index")]pub mod index;#[cfg(feature = "index")]pub use index::function::diff as index; ///#[cfg(feature = "blob")]pub mod blob;