use git_object::{borrowed, HashKind};use std::path::PathBuf; pub struct Db {    pub path: PathBuf,} /// Initializationimpl Db {    pub fn at(path: impl Into<PathBuf>) -> Db {        Db { path: path.into() }    }} pub(crate) fn sha1_path(id: borrowed::Id, mut root: PathBuf) -> PathBuf {    match id.kind() {        HashKind::Sha1 => {            let hex = id.to_sha1_hex();            let buf = std::str::from_utf8(&hex).expect("ascii only in hex");            root.push(&buf[..2]);            root.push(&buf[2..]);            root        }    }} pub mod iter;pub mod locate;pub mod write;