From 99bca6e8c9e147c884200230ea7eaea5d55dfdae Mon Sep 17 00:00:00 2001
From: Kevin Yap <me@kevinyap.ca>
Date: Fri, 12 May 2017 00:16:52 -0700
Subject: [PATCH] Add tidy check to detect empty files

Addresses #18439.
---
 src/tools/tidy/src/style.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/tools/tidy/src/style.rs b/src/tools/tidy/src/style.rs
index 28a55a8763c..8bf683de870 100644
--- a/src/tools/tidy/src/style.rs
+++ b/src/tools/tidy/src/style.rs
@@ -107,6 +107,11 @@ pub fn check(path: &Path, bad: &mut bool) {
 
         contents.truncate(0);
         t!(t!(File::open(file), file).read_to_string(&mut contents));
+
+        if contents.is_empty() {
+            tidy_error!(bad, "{}: empty file", file.display());
+        }
+
         let skip_cr = contents.contains("ignore-tidy-cr");
         let skip_tab = contents.contains("ignore-tidy-tab");
         let skip_length = contents.contains("ignore-tidy-linelength");