fix: incremental build for deno declaration files (#9138)

1 files changed, 9 insertions, 1 deletions

diff --git a/cli/build.rs b/cli/build.rs
index 5b19ab71e..4d6295024 100644
--- a/cli/build.rs
+++ b/cli/build.rs
@@ -117,6 +117,15 @@ fn create_compiler_snapshot(
     "esnext.weakref",
   ];
 
+  let path_dts = cwd.join("dts");
+  // ensure we invalidate the build properly.
+  for name in libs.iter() {
+    println!(
+      "cargo:rerun-if-changed={}",
+      path_dts.join(format!("lib.{}.d.ts", name)).display()
+    );
+  }
+
   // create a copy of the vector that includes any op crate libs to be passed
   // to the JavaScript compiler to build into the snapshot
   let mut build_libs = libs.clone();
@@ -125,7 +134,6 @@ fn create_compiler_snapshot(
   }
 
   let re_asset = Regex::new(r"asset:/{3}lib\.(\S+)\.d\.ts").expect("bad regex");
-  let path_dts = cwd.join("dts");
   let build_specifier = "asset:///bootstrap.ts";
 
   let mut js_runtime = JsRuntime::new(RuntimeOptions {