rustify db url building

src/main.rs

@@ -130,31 +130,26 @@ async fn download(
 }
 
 fn get_db_url() -> String {
-    return env::var("DATABASE_URL").unwrap_or_else(|_| {
-        let mut url = "postgresql://".to_string();
-
-        let user = env::var("DATABASE_USER").unwrap_or_default();
-        if !user.is_empty() {
-            url += user.as_str();
-
-            let pass = env::var("DATABASE_PASS").unwrap_or_default();
-            if !pass.is_empty() {
-                url += ":";
-                url += pass.as_str();
+    if let Ok(database_url) = env::var("DATABASE_URL") {
+        return database_url;
     }
 
-            url += "@";
+    let auth = if let Ok(user) = env::var("DATABASE_USER") {
+        if let Ok(pass) = env::var("DATABASE_PASS") {
+            format!("{}:{}@", user, pass)
+        } else {
+            format!("{}@", user)
         }
-        url += env::var("DATABASE_HOST")
-            .unwrap_or_else(|_| "localhost".to_string())
-            .as_str();
-        url += "/";
-        url += env::var("DATABASE_NAME")
-            .unwrap_or_else(|_| "datatrash".to_string())
-            .as_str();
+    } else {
+        String::new()
+    };
 
-        url.to_string()
-    });
+    format!(
+        "postgresql://{}{}/{}",
+        auth,
+        env::var("DATABASE_HOST").unwrap_or_else(|_| "localhost".to_string()),
+        env::var("DATABASE_NAME").unwrap_or_else(|_| "datatrash".to_string())
+    )
 }
 
 async fn setup_db() -> PgPool {
@@ -183,6 +178,7 @@ struct Config {
 
 #[actix_rt::main]
 async fn main() -> std::io::Result<()> {
+    dbg!(env::var("ASDF"));
     if env::var("RUST_LOG").is_err() {
         env::set_var("RUST_LOG", "info");
     }