From 61096d61c3f8730ee585001f0e2a31e09d4ac3f3 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Mon, 20 Mar 2023 13:29:27 -0400
Subject: [PATCH] fixup-features: Use write-and-rename pattern.

---
 maint/fixup-features/src/main.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/maint/fixup-features/src/main.rs b/maint/fixup-features/src/main.rs
index 1947148c7..127ab4aeb 100644
--- a/maint/fixup-features/src/main.rs
+++ b/maint/fixup-features/src/main.rs
@@ -269,7 +269,9 @@ impl Crate {
         let new_text = self.toml_doc.to_string();
         if new_text != old_text {
             println!("{} changed. Replacing.", self.name);
-            std::fs::write(&self.toml_file, new_text.as_str())?;
+            let tmpname = self.toml_file.with_extension("toml.tmp");
+            std::fs::write(&tmpname, new_text.as_str())?;
+            std::fs::rename(&tmpname, &self.toml_file)?;
         }
         Ok(())
     }