refactor: Un-nest code. Use clap-derive. (#122)

src/cli.rs

@@ -1,17 +1,9 @@
+use clap::Parser;
 use std::path::PathBuf;
 
-use clap::{Command, arg, crate_description, crate_name, crate_version, value_parser};
-
-pub fn cli() -> Command {
-    Command::new(crate_name!())
-        .about(crate_description!())
-        .version(crate_version!())
-        .arg(
-            arg!(--config <config>)
-                .short('c')
-                .id("config")
-                .required(false)
-                .help("Config file path")
-                .value_parser(value_parser!(PathBuf)),
-        )
+#[derive(Parser)]
+#[command(version, about)]
+pub struct Args {
+    #[arg(short, long)]
+    pub config_path: Option<PathBuf>,
 }

src/main.rs

@@ -7,23 +7,22 @@ use bluetui::{
     rfkill,
     tui::Tui,
 };
+use clap::Parser;
 use ratatui::{Terminal, backend::CrosstermBackend};
-use std::{io, path::PathBuf, process::exit, sync::Arc};
+use std::{io, process::exit, sync::Arc};
 
 #[tokio::main]
 async fn main() -> AppResult<()> {
-    let args = cli::cli().get_matches();
+    let args = cli::Args::parse();
 
-    let config_file_path = if let Some(config) = args.get_one::<PathBuf>("config") {
-        if config.exists() {
-            Some(config.to_owned())
+    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);
         }
-    } else {
-        None
-    };
+    });
 
     rfkill::check()?;