Move config into its own file

src/config.rs

@@ -0,0 +1,19 @@
+use figment::{
+    providers::{Env, Format, Toml},
+    Figment,
+};
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    pub meaning_of_life: String,
+}
+
+impl Config {
+    pub fn load() -> Result<Self, figment::Error> {
+        Figment::new()
+            .merge(Toml::file("config.toml"))
+            .merge(Env::raw())
+            .extract()
+    }
+}

src/main.rs

@@ -1,29 +1,16 @@
+mod config;
 mod tracing;
 
 use ::tracing::info;
 use eyre::Context;
-use figment::{
-    providers::{Env, Format, Toml},
-    Figment,
-};
-use serde::Deserialize;
 
-use crate::tracing::set_up_tracing;
+use crate::{config::Config, tracing::set_up_tracing};
-
-#[derive(Deserialize)]
-struct Config {
-    meaning_of_life: String,
-}
 
 #[tokio::main]
 async fn main() -> eyre::Result<()> {
     set_up_tracing("rust_tokio_service_template").context("Failed to set up tracing")?;
 
-    let Config { meaning_of_life } = Figment::new()
+    let Config { meaning_of_life } = Config::load().context("Failed to load config")?;
-        .merge(Toml::file("config.toml"))
-        .merge(Env::raw())
-        .extract()
-        .context("Failed to extract config")?;
 
     info!("The meaning of life is {meaning_of_life}");