add config file stub

src/main.rs

@@ -12,6 +12,7 @@ mod quic;
 
 use bunt::println;
 use clap::{Parser, Subcommand};
+use config::{Config, Source};
 use log::info;
 use pman::{init_process_manager, ProcessCommand, ProcessManager};
 use shadow_rs::shadow;
@@ -26,9 +27,9 @@ static PMAN_SENDER: OnceLock<Sender<ProcessCommand>> = OnceLock::new();
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 struct Args {
-    /// Name of the person to greet
-    //#[arg(short, long)]
-    //name: String,
+    /// Config File to load
+    #[arg(short, long)]
+    config: Option<String>,
 
     /// Number of times to greet
     //#[arg(short, long, default_value_t = 1)]
@@ -41,9 +42,7 @@ struct Args {
 #[derive(Debug, Subcommand)]
 enum Commands {
     #[command(arg_required_else_help = true, about = "Start client without GUI")]
-    CliClient {
-        config_file: Option<String>
-    },
+    CliClient,
     #[command(about = "List compile time backed info to audit binary")]
     Shadow,
     #[command(about = "Start client as GUI")]
@@ -51,16 +50,38 @@ enum Commands {
     Devtest,
 }
 
+fn config() -> &'static Config {
+    static CONFIG: OnceLock<Config> = OnceLock::new();
+    CONFIG.get_or_init(|| {
+        Config::builder()
+            .add_source(config::Environment::with_prefix("HAI").separator("_"))
+            .add_source(get_config_file_source())
+            .build()
+            .unwrap()
+    })
+}
+
+static CONFIG_FILE: OnceLock<Option<String>> = OnceLock::new();
+
+fn get_config_file_source() -> impl Source {
+    let file = CONFIG_FILE.get();
+    let default_dir = dirs::config_dir().unwrap();
+    config::File::from_str(s, format)
+}
+
 #[tokio::main]
 async fn main() {
 
     env_logger::init();
     let args = Args::parse();
+    CONFIG_FILE.get_or_init(|| {
+        args.config
+    });
 
     let _ = init_process_manager();
 
     match args.command {
-        Commands::CliClient { config_file } => {}
+        Commands::CliClient => {}
 
         Commands::Shadow => {
             bininfo::print_info();