more libs

src/engine.rs

@@ -1,4 +1,5 @@
 use crate::config::Engine;
+use rusb::UsbContext;
 
 pub trait InputEngine {
    fn get(&mut self) -> Vec<char>;
@@ -17,7 +18,18 @@ struct InputEngineDevice {
 }
 
 pub fn build_input_engine_device(cfg: &Engine) -> Result<Box<dyn InputEngine>, String> {
-   let device_cfg = cfg.device.as_ref().unwrap();
+   let _device_cfg = cfg.device.as_ref().unwrap();
+
+   assert!(rusb::has_capability());
+   let ctx = rusb::Context::new().unwrap();
+   for device in ctx.devices().unwrap().iter() {
+       let device_desc = device.device_descriptor().unwrap();
+       println!("Bus {:03} Device {:03} ID {:04x}:{:04x}",
+           device.bus_number(),
+           device.address(),
+           device_desc.vendor_id(),
+           device_desc.product_id());
+   }
    return Err("do what".to_string());
 }
 
@@ -31,7 +43,7 @@ struct InputEngineKafka {
 }
 
 pub fn build_input_engine_kafka(cfg: &Engine) -> Result<Box<dyn InputEngine>, String> {
-   let kafka_cfg = cfg.kafka.as_ref().unwrap();
+   let _kafka_cfg = cfg.kafka.as_ref().unwrap();
    return Err("do what".to_string());
 }