feat: add option to activate continuous monitoring on config file

rpxy-bin/src/config/parse.rs

@@ -3,25 +3,44 @@ use crate::{
   cert_file_reader::CryptoFileSource,
   error::{anyhow, ensure},
 };
-use clap::Arg;
+use clap::{Arg, ArgAction};
 use rpxy_lib::{AppConfig, AppConfigList, ProxyConfig};
 
-pub fn parse_opts() -> Result<String, anyhow::Error> {
+/// Parsed options
+pub struct Opts {
+  pub config_file_path: String,
+  pub watch: bool,
+}
+
+/// Parse arg values passed from cli
+pub fn parse_opts() -> Result<Opts, anyhow::Error> {
   let _ = include_str!("../../Cargo.toml");
-  let options = clap::command!().arg(
-    Arg::new("config_file")
-      .long("config")
-      .short('c')
-      .value_name("FILE")
-      .required(true)
-      .help("Configuration file path like ./config.toml"),
-  );
+  let options = clap::command!()
+    .arg(
+      Arg::new("config_file")
+        .long("config")
+        .short('c')
+        .value_name("FILE")
+        .required(true)
+        .help("Configuration file path like ./config.toml"),
+    )
+    .arg(
+      Arg::new("watch")
+        .long("watch")
+        .short('w')
+        .action(ArgAction::SetTrue)
+        .help("Activate dynamic reloading of the config file via continuous monitoring"),
+    );
   let matches = options.get_matches();
 
   ///////////////////////////////////
-  let config_file_path = matches.get_one::<String>("config_file").unwrap();
+  let config_file_path = matches.get_one::<String>("config_file").unwrap().to_owned();
+  let watch = matches.get_one::<bool>("watch").unwrap().to_owned();
 
-  Ok(config_file_path.to_string())
+  Ok(Opts {
+    config_file_path,
+    watch,
+  })
 }
 
 pub fn build_settings(