refactor: unify the behavior of the steps that require sudo (#467)

src/steps/os/macos.rs

@@ -1,6 +1,7 @@
 use crate::command::CommandExt;
 use crate::execution_context::ExecutionContext;
 use crate::terminal::{print_separator, prompt_yesno};
+use crate::utils::{require_option, REQUIRE_SUDO};
 use crate::{utils::require, Step};
 use color_eyre::eyre::Result;
 use std::fs;
@@ -9,7 +10,8 @@ use tracing::debug;
 
 pub fn run_macports(ctx: &ExecutionContext) -> Result<()> {
     require("port")?;
-    let sudo = ctx.sudo().as_ref().unwrap();
+    let sudo = require_option(ctx.sudo().as_ref(), REQUIRE_SUDO.to_string())?;
+
     print_separator("MacPorts");
     ctx.run_type()
         .execute(sudo)