use std::path::Path;

/// The Mercurial transaction system is based on the append-only nature

/// of its core files. This exposes the necessary methods to safely write to

/// the different core datastructures.

pub trait Transaction {

    /// Record the state of an append-only file before update

    fn add(&mut self, file: impl AsRef<Path>, offset: usize);

    // TODO the rest of the methods once we do more in Rust.

}