From ab78e4f64e98fc743f3a1419d243948c033806ac Mon Sep 17 00:00:00 2001
From: Jason Miller <developit@google.com>
Date: Wed, 6 Mar 2019 11:09:29 -0500
Subject: [PATCH] Preserve minification semantics when transforming bare import
 specifiers (fixes #149)

---
 modules/utils/rewriteBareModuleIdentifiers.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/utils/rewriteBareModuleIdentifiers.js b/modules/utils/rewriteBareModuleIdentifiers.js
index 22e1998..d540747 100644
--- a/modules/utils/rewriteBareModuleIdentifiers.js
+++ b/modules/utils/rewriteBareModuleIdentifiers.js
@@ -16,6 +16,10 @@ export default function rewriteBareModuleIdentifiers(code, packageConfig) {
     // because we haven't installed dependencies so
     // we can't load plugins; see #84
     babelrc: false,
+    // Make a reasonable attempt to preserve whitespace
+    // from the original file. This ensures minified
+    // .mjs stays minified; see #149
+    retainLines: true,
     plugins: [unpkgRewrite(origin, dependencies)]
   };