fix(cli): add hygiene pass to transpile pipeline (#8586)

Co-authored-by: Bartek Iwańczuk <[email protected]>

cli/ast.rs

@@ -42,6 +42,7 @@ use swc_ecmascript::parser::Syntax;
 use swc_ecmascript::parser::TsConfig;
 use swc_ecmascript::transforms::fixer;
 use swc_ecmascript::transforms::helpers;
+use swc_ecmascript::transforms::hygiene;
 use swc_ecmascript::transforms::pass::Optional;
 use swc_ecmascript::transforms::proposals;
 use swc_ecmascript::transforms::react;
@@ -305,6 +306,7 @@ impl ParsedModule {
       helpers::inject_helpers(),
       typescript::strip(),
       fixer(Some(&self.comments)),
+      hygiene(),
     );
 
     let program = swc_common::GLOBALS.set(&Globals::new(), || {

cli/tests/integration_tests.rs

@@ -2927,6 +2927,11 @@ itest!(no_check_decorators {
   output: "no_check_decorators.ts.out",
 });
 
+itest!(runtime_decorators {
+  args: "run --quiet --reload --no-check runtime_decorators.ts",
+  output: "runtime_decorators.ts.out",
+});
+
 itest!(lib_ref {
   args: "run --quiet --unstable --reload lib_ref.ts",
   output: "lib_ref.ts.out",

cli/tests/runtime_decorators.ts

@@ -0,0 +1,42 @@
+// deno-lint-ignore-file
+function A() {
+  console.log("@A evaluated");
+  return function (
+    target: any,
+    propertyKey: string,
+    descriptor: PropertyDescriptor,
+  ) {
+    console.log("@A called");
+    const fn = descriptor.value;
+    descriptor.value = function () {
+      console.log("fn() called from @A");
+      fn();
+    };
+  };
+}
+
+function B() {
+  console.log("@B evaluated");
+  return function (
+    target: any,
+    propertyKey: string,
+    descriptor: PropertyDescriptor,
+  ) {
+    console.log("@B called");
+    const fn = descriptor.value;
+    descriptor.value = function () {
+      console.log("fn() called from @B");
+      fn();
+    };
+  };
+}
+
+class C {
+  @A()
+  @B()
+  static test() {
+    console.log("C.test() called");
+  }
+}
+
+C.test();

cli/tests/runtime_decorators.ts.out

@@ -0,0 +1,7 @@
+@A evaluated
+@B evaluated
+@B called
+@A called
+fn() called from @A
+fn() called from @B
+C.test() called