[Minigrep] - passing the errors to the calling function

minigrep/src/main.rs

@@ -1,6 +1,6 @@
 use std::env;
+use std::error::Error;
 use std::fs;
-use std::os::unix::process;
 struct Config {
     query: String,
     file_path: String,
@@ -15,6 +15,12 @@ impl Config {
         Ok(Config { query, file_path })
     }
 }
+fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let contents = fs::read_to_string(config.file_path)?;
+    println!("With text:\n {contents}");
+
+    Ok(())
+}
 fn main() {
     let args: Vec<String> = env::args().collect();
     let config = Config::build(&args).unwrap_or_else(|err| {
@@ -25,8 +31,8 @@ fn main() {
     println!("Searching for {}", config.query);
     println!("In file {}", config.file_path);
 
-    let contents =
-        fs::read_to_string(config.file_path).expect("Should have been able to read the file");
-
-    println!("With text:\n {contents}");
+    if let Err(e) = run(config) {
+        println!("Application error: {e}");
+        std::process::exit(1);
+    }
 }