first commit

src/config.rs

@@ -0,0 +1,35 @@
+use std::{env, net::IpAddr};
+
+#[derive(Debug, Clone)]
+pub struct Config {
+    pub host: IpAddr,
+    pub port: u16,
+    pub database_url: String,
+    pub database_max_connections: u32,
+    pub static_dir: String,
+    pub asset_version: String,
+}
+
+impl Config {
+    pub fn from_env() -> Result<Self, Box<dyn std::error::Error>> {
+        let host = env_var("APP_HOST", "127.0.0.1").parse()?;
+        let port = env_var("APP_PORT", "3000").parse()?;
+        let database_max_connections = env_var("DATABASE_MAX_CONNECTIONS", "8").parse()?;
+
+        Ok(Self {
+            host,
+            port,
+            database_url: env_var("DATABASE_URL", "sqlite://rustpad.db?mode=rwc"),
+            database_max_connections,
+            static_dir: env_var("STATIC_DIR", "static"),
+            asset_version: env::var("ASSET_VERSION")
+                .ok()
+                .filter(|value| !value.trim().is_empty())
+                .unwrap_or_else(|| env!("CARGO_PKG_VERSION").to_owned()),
+        })
+    }
+}
+
+fn env_var(name: &str, default: &str) -> String {
+    env::var(name).unwrap_or_else(|_| default.to_owned())
+}