logging framework

Cargo.toml

@@ -9,3 +9,5 @@ edition = "2018"
 [dependencies]
 docopt = "1.1.0"
 serde = "1.0.91"
+log = "0.4.6"
+pretty_env_logger = "0.3.0"

src/main.rs

@@ -1,5 +1,6 @@
 use docopt::Docopt;
 use serde::Deserialize;
+use log::{debug};
 
 static USAGE: &'static str = "
 foil
@@ -28,10 +29,10 @@ struct Args {
 }
 
 fn main() {
-    println!("Hello, world!");
+    pretty_env_logger::init();
     let args: Args = Docopt::new(USAGE)
         .and_then(|dopt| dopt.deserialize())
         .unwrap_or_else(|e| e.exit());
-    println!("{:?}", args);
+    debug!("{:?}", args);
 
 }