add: use BufReader for line by line reading

src/main.rs

@@ -1,22 +1,25 @@
 #![allow(unused_imports)]
 
 use std::env;
-use std::fs;
+use std::fs::File;
+use std::io::{BufRead, BufReader};
 use log::{debug, error, info, trace, warn};
 use plume_log::{PlumeBuilder, success};
 
-fn main(){
+fn main() -> std::io::Result<()>{
     PlumeBuilder::new()
 	.with_level(log::LevelFilter::Trace)
 	.init()
 	.expect("Failed to init the logger");
     
     let args: Vec<String> = env::args().collect();
-    let file_path = &args[1];
-    info!("{}", file_path);
+    info!("File: {}", &args[1]);
+    let file = File::open(&args[1])?;
+    let reader = BufReader::new(file);
 
-    let contents = fs::read_to_string(file_path)
-	.expect("File can't be read");
+    for line in reader.lines() {
+	println!("+ {}", line?);
+    }
 
-    println!("{}", contents);
+    Ok(())
 }