From dc6fcaeae8b938f15ffc7dfeafc583d69ccd2be7 Mon Sep 17 00:00:00 2001
From: Tshepang Mbambo <tshepang@gmail.com>
Date: Fri, 19 Aug 2022 07:19:14 +0200
Subject: [PATCH] address review comment

https://github.com/rust-lang/rustc-dev-guide/pull/1428#discussion_r948143840
---
 ci/date-check/src/main.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ci/date-check/src/main.rs b/ci/date-check/src/main.rs
index ea8b2431..70fce8b1 100644
--- a/ci/date-check/src/main.rs
+++ b/ci/date-check/src/main.rs
@@ -3,6 +3,7 @@ use std::{
     convert::TryInto as _,
     env, fmt, fs,
     path::{Path, PathBuf},
+    process,
     str::FromStr,
 };
 
@@ -124,7 +125,12 @@ fn filter_dates(
 }
 
 fn main() {
-    let root_dir = env::args().nth(1).unwrap_or(".".into());
+    let mut args = env::args();
+    if args.len() == 1 {
+        eprintln!("error: expected root Markdown directory as CLI argument");
+        process::exit(1);
+    }
+    let root_dir = args.nth(1).unwrap();
     let root_dir_path = Path::new(&root_dir);
     let glob_pat = format!("{}/**/*.md", root_dir);
     let today_chrono = Utc::today();