Add configuration via .env.toml

backend-rs/.env.toml

@@ -0,0 +1,3 @@
+[config.app]
+host = [0, 0, 0, 0]
+port = 8601

backend-rs/Cargo.toml

@@ -5,7 +5,9 @@ edition = "2021"
 
 [dependencies]
 axum = "0.7.4"
+serde = { version = "1.0.196", features = ["derive"] }
 tokio = { version = "1.36.0", features = ["rt-multi-thread"] }
+toml-env = "1.1.1"
 tower-http = { version = "0.5.1", features = ["trace"] }
 tracing = "0.1.40"
 tracing-subscriber = "0.3.18"

backend-rs/src/config.rs

@@ -0,0 +1,22 @@
+use serde::{Deserialize, Serialize};
+use toml_env::Args;
+
+#[derive(Serialize, Deserialize)]
+pub struct Config {
+  pub app: App,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct App {
+  pub host: [u8; 4],
+  pub port: u16,
+}
+
+pub fn load() -> Config {
+  toml_env::initialize(Args {
+    config_variable_name: "config",
+    ..Default::default()
+  })
+  .expect("could not initialize toml_env")
+  .expect("could not load config")
+}

backend-rs/src/main.rs

@@ -1,3 +1,5 @@
+mod config;
+
 use axum::{routing, Router};
 use std::net::SocketAddr;
 use tokio::net::TcpListener;
@@ -6,6 +8,8 @@ use tracing::{info, Level};
 
 #[tokio::main]
 async fn main() {
+  let config = config::load();
+
   tracing_subscriber::fmt()
     .with_target(false)
     .compact()
@@ -19,7 +23,7 @@ async fn main() {
         .on_response(DefaultOnResponse::new().level(Level::INFO)),
     );
 
-  let listener = TcpListener::bind(SocketAddr::from(([0, 0, 0, 0], 8601)))
+  let listener = TcpListener::bind(SocketAddr::from((config.app.host, config.app.port)))
     .await
     .expect("could not bind");