Revert "refactor: make Config::new fallible"

This reverts commit 0a4f5e3.

Author: sermuns

src/config.rs

@@ -1,7 +1,6 @@
 use core::fmt;
-use std::path::PathBuf;
+use std::{path::PathBuf, process::exit};
 
-use anyhow::Context;
 use ratatui::layout::Flex;
 use toml;
 
@@ -11,8 +10,6 @@ use serde::{
     de::{self, Unexpected, Visitor},
 };
 
-use crate::app::AppResult;
-
 #[derive(Deserialize, Debug)]
 pub struct Config {
     #[serde(default = "default_layout", deserialize_with = "deserialize_layout")]
@@ -205,17 +202,23 @@ fn default_toggle_device_favorite() -> char {
 }
 
 impl Config {
-    pub fn new(config_file_path: Option<PathBuf>) -> AppResult<Self> {
+    pub fn new(config_file_path: Option<PathBuf>) -> Self {
         let conf_path = config_file_path.unwrap_or(
             dirs::config_dir()
                 .unwrap()
                 .join("bluetui")
                 .join("config.toml"),
         );
 
-        let config_file_contents =
-            std::fs::read_to_string(conf_path).context("failed reading contents of config file")?;
+        let config = std::fs::read_to_string(conf_path).unwrap_or_default();
+        let app_config: Config = match toml::from_str(&config) {
+            Ok(c) => c,
+            Err(e) => {
+                eprintln!("{}", e);
+                exit(1);
+            }
+        };
 
-        toml::from_str(&config_file_contents).context("failed deserializing config file")
+        app_config
     }
 }

src/help.rs

@@ -223,7 +223,7 @@ mod tests {
                     frame.area(),
                     focused_block,
                     frame.area(),
-                    Config::new(None).unwrap().into(),
+                    Config::new(None).into(),
                 );
             })
             .unwrap();

src/main.rs

@@ -9,15 +9,24 @@ use bluetui::{
 };
 use clap::Parser;
 use ratatui::{Terminal, backend::CrosstermBackend};
-use std::{io, sync::Arc};
+use std::{io, process::exit, sync::Arc};
 
 #[tokio::main]
 async fn main() -> AppResult<()> {
     let args = cli::Args::parse();
 
+    let config_file_path = args.config_path.map(|config_path| {
+        if config_path.exists() {
+            config_path.to_owned()
+        } else {
+            eprintln!("Config file not found");
+            exit(1);
+        }
+    });
+
     rfkill::check()?;
 
-    let config = Arc::new(Config::new(args.config_path)?);
+    let config = Arc::new(Config::new(config_file_path));
 
     let backend = CrosstermBackend::new(io::stdout());
     let terminal = Terminal::new(backend)?;