rhg: add a limited `rhg cat -r` subcommand
It only supports revision specification (rev or full hash) and the list of files
to cat.
Differential Revision: https://phab.mercurial-scm.org/D9052
pub mod cat;
pub mod debugdata;
pub mod files;
pub mod root;
use crate::error::CommandError;
use crate::ui::Ui;
/// The common trait for rhg commands
///
/// Normalize the interface of the commands provided by rhg
pub trait Command {
fn run(&self, ui: &Ui) -> Result<(), CommandError>;
}