add support for debugging external node internals

Author: mmomtchev

src/targets/node/nodeSourcePathResolver.ts

@@ -38,6 +38,13 @@ export class NodeSourcePathResolver extends SourcePathResolverBase<IOptions> {
     // replace any query string, which can be generated by webpack bundles
     url = url.replace(/\?.+/, '');
 
+    // Allow debugging of externally loaded Node internals
+    // [ by building Node with ./configure --node-builtin-modules-path $(pwd) ]
+    if (url.startsWith('node:')) {
+      url = url.replace('node:', this.options.basePath + '/lib/');
+      if (!url.endsWith('.js')) url += '.js';
+    }
+
     if (map) {
       return this.sourceMapSourceToAbsolute(url, map);
     }