Check if config file exists

src/shared/config.rs

@@ -1,18 +1,22 @@
 use anyhow::Result;
 use serde::{Deserialize, Serialize};
 
-use std::{fs::File, io::Write};
+use std::{fs::File, io::Write, path::Path};
 
 pub const COMMAND_COUNT: usize = 8;
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, Default)]
 pub struct Config {
     pub commands: [Option<String>; COMMAND_COUNT],
 }
 
 impl Config {
     pub fn open(path: &str) -> Result<Config> {
+        if Path::new(path).exists() {
             Ok(serde_json::from_str(&std::fs::read_to_string(path)?)?)
+        } else {
+            Ok(Config::default())
+        }
     }
 
     pub fn save(&self, path: &str) -> Result<()> {
@@ -24,11 +28,3 @@ impl Config {
         Ok(())
     }
 }
-
-impl Default for Config {
-    fn default() -> Config {
-        Config {
-            commands: Default::default(),
-        }
-    }
-}