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//! Git stores all of its data as _Objects_, which are data along with a hash over all data. Storing objects efficiently
//! is what git packs are concerned about.
//!
//! Packs consist of [data files][data::File] and [index files][index::File]. The latter can be generated from a data file
//! and make accessing objects within a pack feasible.
//!
//! A [Bundle] conveniently combines a data pack alongside its index to allow [finding][Find] objects or verifying the pack.
//! Objects returned by `.find(…)` are [objects][gix_object::Data] which know their pack location in order to speed up
//! various common operations like creating new packs from existing ones.
//!
//! When traversing all objects in a pack, a _delta tree acceleration structure_ can be built from pack data or an index
//! in order to decompress packs in parallel and without any waste.
//! ## 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)]
///
pub mod bundle;
/// A bundle of pack data and the corresponding pack index
pub struct Bundle {
/// The pack file corresponding to `index`
pub pack: data::File,
/// The index file corresponding to `pack`
pub index: index::File,
}
///
pub mod find;
///
pub mod cache;
///
pub mod data;
mod find_traits;
pub use find_traits::{Find, FindExt};
///
pub mod index;
///
pub mod multi_index;
///
pub mod verify;
mod mmap {
use std::path::Path;
pub fn read_only(path: &Path) -> std::io::Result<memmap2::Mmap> {
let file = std::fs::File::open(path)?;
// SAFETY: we have to take the risk of somebody changing the file underneath. Git never writes into the same file.
#[allow(unsafe_code)]
unsafe {
memmap2::Mmap::map(&file)
}
}
}
use std::convert::TryInto;
#[inline]
fn read_u32(b: &[u8]) -> u32 {
u32::from_be_bytes(b.try_into().unwrap())
}
#[inline]
fn read_u64(b: &[u8]) -> u64 {
u64::from_be_bytes(b.try_into().unwrap())
}
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