use default values instead of Option

src/app.rs

@@ -16,7 +16,8 @@ pub struct App {
 	pub command: String,
 
 	/// arguments
-	pub args: Option<Vec<String>>,
+	#[serde(default = "Vec::new")]
+	pub args: Vec<String>,
 
 	/// should the app be restarted if it exits successfully
 	#[serde(default = "ret_false")]
@@ -31,10 +32,12 @@ pub struct App {
 	pub restart_on_terminate: bool,
 
 	/// on sup startup, should we wait for this app to run before continuting
-	pub wait: Option<bool>,
+	#[serde(default = "ret_false")]
+	pub wait: bool,
 
 	/// should this app keep sup from exiting, if it's running
-	pub hold: Option<bool>,
+	#[serde(default = "ret_false")]
+	pub hold: bool,
 }
 
 fn ret_false() -> bool {
@@ -47,8 +50,7 @@ impl App {
 		info!("[{}] starting", &self.name.yellow());
 
 		let mut command = Command::new(&self.command);
-		let args = self.args.as_ref();
-		command.args(args.unwrap_or(&Vec::new()));
+		command.args(&self.args);
 
 		match command.output() {
 			Ok(output) => {

src/apps.rs

@@ -67,7 +67,7 @@ impl Apps {
 
 		for app in self.apps() {
 			// app needs to be waited on before starting the next one
-			if app.wait.unwrap_or(false) {
+			if app.wait {
 				if let Err(e) = app.wait_start() {
 					error!("[{}] failed to start: {:?}", &app.name.yellow(), e);
 				}
@@ -79,7 +79,7 @@ impl Apps {
 				match Proc::start(app) {
 					Ok(proc) => {
 						// see if we need to hold on this app
-						if proc.app.hold.unwrap_or(false) {
+						if proc.app.hold {
 							holds = Some(holds.unwrap_or(0) + 1);
 						}
 

src/proc.rs

@@ -24,8 +24,7 @@ impl Proc {
 		command.stdout(Stdio::piped());
 		command.stderr(Stdio::piped());
 
-		let args = app.args.as_ref();
-		command.args(args.unwrap_or(&Vec::new()));
+		command.args(&app.args);
 
 		let process = command.spawn_async()?;
 		let token = Token(process.id().try_into()?);

src/run.rs

@@ -38,7 +38,7 @@ pub fn run(procs: Vec<Proc>, holds: Option<i8>, poll: Poll) -> Result<Vec<Proc>>
 }
 
 /// restart an App, return the new Proc or report error
-fn restart_app(proc: Proc) -> Result<Proc> {
+fn restart_app(proc: &Proc) -> Result<Proc> {
 	let app = proc.app.clone();
 	let name = proc.app.name.clone();
 
@@ -123,16 +123,30 @@ fn run_loop(procs: Vec<Proc>, holds: Option<i8>, poll: Poll, signals: Signals) -
 					}
 					// process exited
 					Ok(ProcessEvent::Exit(status)) => {
+						let hold = proc.app.hold;
+
 						if let Some(code) = status.code() {
-							info!("[{}] exited with code {}", &proc.app.name.yellow(), code);
+							if code == 0 {
+								info!("[{}] exited successfully", &proc.app.name.yellow());
+
+								if proc.app.restart_on_failure {
+									if let Ok(p) = restart_app(&proc) {
+										poll.register(&p.process, p.token, Ready::all(), PollOpt::edge())
+										.unwrap();
+									procs.push(p);
+									} else if hold {
+										holds = Some(holds.unwrap_or(0) - 1);
+									}
+								}
+							} else {
+								info!("[{}] exited unsuccessfully with code {}", &proc.app.name.yellow(), code);
+							}
 						} else {
-							info!("[{}] exited with unknown code", &proc.app.name.yellow());
+							info!("[{}] was terminated", &proc.app.name.yellow());
 						}
 
-						let hold = proc.app.hold.unwrap_or(false);
-
 						if proc.app.check_restart(status) {
-							if let Ok(p) = restart_app(proc) {
+							if let Ok(p) = restart_app(&proc) {
 								poll.register(&p.process, p.token, Ready::all(), PollOpt::edge())
 									.unwrap();
 								procs.push(p);