From 457d820bb3658994fe7c42bcf0908d9f6f7eb27c Mon Sep 17 00:00:00 2001
From: undefined <i@undefined.moe>
Date: Tue, 11 Jun 2024 15:12:41 +0800
Subject: [PATCH] register: allow load sourcemap from file

---
 packages/register/index.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/register/index.js b/packages/register/index.js
index 6d70e161e..d7ee5f518 100644
--- a/packages/register/index.js
+++ b/packages/register/index.js
@@ -50,6 +50,12 @@ require.extensions['.js'] = function loader(module, filename) {
     }
     try {
         const content = fs.readFileSync(filename, 'utf-8');
+        const lastLine = content.trim().split('\n').pop();
+        if (lastLine.startsWith('//# sourceMappingURL=data:application/json;base64,')) {
+            const info = lastLine.split('//# sourceMappingURL=data:application/json;base64,')[1];
+            const payload = JSON.parse(Buffer.from(info, 'base64').toString());
+            map[filename] = payload;
+        }
         return module._compile(content, filename);
     } catch (e) { // ESM
         return module._compile(transform(filename), filename);