use std::error::Error;
use std::fmt::Display;
use resources::Resource;

pub trait Symbol: Display {
  fn target_reached(&self) -> Result<bool, Box<Error>>;
  fn execute(&self) -> Result<(), Box<Error>>;
  fn get_prerequisites(&self) -> Vec<Resource> {
    vec![]
  }
  fn provides(&self) -> Option<Vec<Resource>> {
    None
  }
}

pub mod acme;
pub mod dir;
pub mod file;
pub mod git;
pub mod hook;
pub mod if_already_present;
pub mod list;
pub mod mariadb;
pub mod nginx;
pub mod not_a_symlink;
pub mod npm;
pub mod owner;
pub mod systemd;
pub mod tls;
pub mod user;