From c5d2e4d863db3d506b855ac8d781a2ad143a7122 Mon Sep 17 00:00:00 2001
From: baoyachi <liaoymxsdl@gmail.com>
Date: Sun, 22 Aug 2021 16:35:12 +0800
Subject: [PATCH] fix env changed rerun

---
 src/lib.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 637ad81..40d9ce8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -335,6 +335,9 @@ impl Shadow {
     fn write_all(&mut self) -> SdResult<()> {
         self.gen_header()?;
 
+        //std env rerun
+        self.cargo_rerun_if_env_changed();
+
         self.gen_const()?;
 
         //write version function
@@ -345,6 +348,12 @@ impl Shadow {
         Ok(())
     }
 
+    fn cargo_rerun_if_env_changed(&self) {
+        for k in self.std_env.keys() {
+            println!("cargo:rerun-if-env-changed={}", k);
+        }
+    }
+
     fn gen_const(&mut self) -> SdResult<()> {
         for (k, v) in self.map.clone() {
             println!("cargo:rerun-if-env-changed={}", k);