impl crate::Repository {    /// The path to the `.git` directory itself, or equivalent if this is a bare repository.    pub fn path(&self) -> &std::path::Path {        self.git_dir()    }     /// Return the work tree containing all checked out files, if there is one.    pub fn work_dir(&self) -> Option<&std::path::Path> {        self.work_tree.as_deref()    }     // TODO: tests    /// The directory of the binary path of the current process.    pub fn install_dir(&self) -> std::io::Result<std::path::PathBuf> {        std::env::current_exe().and_then(|exe| {            exe.parent()                .map(ToOwned::to_owned)                .ok_or_else(|| std::io::Error::new(std::io::ErrorKind::Other, "no parent for current executable"))        })    }     /// Return the kind of repository, either bare or one with a work tree.    pub fn kind(&self) -> crate::Kind {        match self.work_tree {            Some(_) => crate::Kind::WorkTree,            None => crate::Kind::Bare,        }    }     /// Return the path to the repository itself, containing objects, references, configuration, and more.    ///    /// Synonymous to [`path()`][crate::Repository::path()].    pub fn git_dir(&self) -> &std::path::Path {        self.refs.base()    }}