From 39765bf9c919519688b7af524890d2be5b7282e0 Mon Sep 17 00:00:00 2001
From: Samuel Tardieu <sam@rfc1149.net>
Date: Tue, 3 Sep 2024 15:45:31 +0200
Subject: [PATCH] Do not rebuild the build script unless necessary

Without this guard, the build script is rebuilt as soon as any file
within the package is changed. This includes files created by external
tools such as IDE.
---
 build.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/build.rs b/build.rs
index 428d4b9fa..91e9d0427 100644
--- a/build.rs
+++ b/build.rs
@@ -15,6 +15,10 @@ pub fn main() {
     const FEATURE_PREFIX: &str = "feat_";
     const OVERRIDE_PREFIX: &str = "uu_";
 
+    // Do not rebuild build script unless the script itself or the enabled features are modified
+    // See <https://doc.rust-lang.org/cargo/reference/build-scripts.html#change-detection>
+    println!("cargo:rerun-if-changed=build.rs");
+
     if let Ok(profile) = env::var("PROFILE") {
         println!("cargo:rustc-cfg=build={profile:?}");
     }