/**

  * parameter-lister (Rust implementation)

  * Copyright © 2016 Vojtěch Král <vojtech@kral.hk>

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 3 of the License, or

  * (at your option) any later version.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. If not, see <http://www.gnu.org/licenses/>.

  */

 use std::collections::HashMap;

 use std::env;

 use std::io;

 mod outputmodule;

 mod terminalmodule;

 mod xmlmodule;

 use outputmodule::OutputModule;

 use terminalmodule::TerminalModule;

 use xmlmodule::XMLModule;

 static ENV_OUTPUT_MODULE_NAME: &'static str = "PARAMETER_LISTER_OUTPUT";

 fn main() {

 	let mut modules: HashMap<_, Box<OutputModule>> = HashMap::new();

 	modules.insert(terminalmodule::MOD_NAME, Box::new(TerminalModule::new()));

 	modules.insert(xmlmodule::MOD_NAME, Box::new(XMLModule::new()));

 	let module_name = env::var(ENV_OUTPUT_MODULE_NAME).unwrap_or(String::from("terminal"));

 	let module = modules.get(&*module_name).expect(&*format!("No such module: {}", module_name));

 	match module.process(&mut io::stdout(), env::args().collect()) {

 		Ok(()) => {},

 		Err(msg) => panic!("Error while processing output with module {}: {}", module_name, msg),

 	}

 }