refacto error handling

copyme.Settings.toml

@@ -1,4 +1,4 @@
-laser_id = 1 
+laser_id = 0
 debug = "true"
 redis_url = "127.0.0.1"
 dac_family = "Helios"

src/conf.rs

@@ -10,7 +10,7 @@ pub enum DacFamily {
     }
 
 #[derive(Deserialize,Debug)]
-pub struct Conf{
+pub struct Conf {
     laser_id : u8,
     debug : bool,
     redis_url : String,
@@ -21,27 +21,12 @@ pub struct Conf{
 
 
 pub fn load_config( path : &str )-> Result<Conf, Box<dyn std::error::Error>> { 
-    
-    let conf_builder = Config::builder()
-        .add_source(config::File::with_name(path));
-        
-        
-    let settings = match conf_builder.build() {
-	   Ok(conf) => conf,
-	   Err(err) => {
-	       println!("Invalid configuration file / missing file: {:?}", err);
-	       return Err(Box::new(err))
-	   }
-	};
+    let settings = Config::builder()
+        .add_source(config::File::with_name(path))
+	.build()?;
             
     let conf = settings
             .try_deserialize::<Conf>()?;
-            // .try_deserialize::<HashMap<String, String>>()?;
-            
-    println!(
-        "{:?}",
-        conf
-    );
                 
     Ok(conf)
 }

src/main.rs

@@ -16,15 +16,39 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 
 use redis_ctrl::{RedisCtrl,Order};
-use conf::{load_config};
+use conf::{load_config,Conf};
 
 
 const CENTER : (u16,u16) = (2000, 2000);
 
-pub fn main() -> Result<(), Box<dyn std::error::Error>> {
+pub fn main() {
 
-    let config = load_config("Settings")?;
+    let config = match load_config("Settings") {
+	Ok(c) => c,
+	Err(err) => {
+	    panic!("Unable to load config file: {:?}", err)
+	}
+    };
            
+    let rs = match RedisCtrl::new() {
+	Ok(rs) => rs,
+	Err(err) => {
+	    panic!("Unable to connect to redis: {:?}", err);
+	}
+    };
+
+    match run_dac(config, rs) {
+	Ok(()) => {},
+	Err(err) => {
+	    panic!("Error: {:?}", err)
+	}
+    }
+}
+
+fn run_dac(
+    config: Conf,
+    mut rs: RedisCtrl
+) -> Result<(), Box<dyn std::error::Error>> {
     let running = Arc::new(AtomicBool::new(true));
     let r = running.clone();
 
@@ -32,15 +56,6 @@ pub fn main() -> Result<(), Box<dyn std::error::Error>> {
         r.store(false, Ordering::SeqCst);
     }).expect("Error setting Ctrl-C handler");
 
-    let mut rs = match RedisCtrl::new() {
-	Ok(rs) => rs,
-	Err(err) => {
-	    println!("Unable to connect to redis: {:?}", err);
-	    return Ok(())
-	}
-    };
-
-    
     let controller = NativeHeliosDacController::new()?;
     let devices = controller.list_devices()?;