Fix checking for commonjs bundling

Author: simolus3

packages/node/rollup.config.mjs

@@ -1,16 +1,33 @@
+const plugin = () => {
+  return {
+    name: 'mark-as-commonjs',
+    resolveImportMeta: (property) => {
+      if (property == 'isBundlingToCommonJs') {
+        return 'true';
+      }
+
+      return null;
+    },
+  };
+};
+
 export default [
   {
     input: 'lib/index.js',
+    plugins: [plugin()],
     output: {
       file: 'dist/bundle.cjs',
-      format: 'cjs'
+      format: 'cjs',
+      sourcemap: true
     }
   },
   {
     input: 'lib/db/SqliteWorker.js',
+    plugins: [plugin()],
     output: {
       file: 'dist/worker.cjs',
-      format: 'cjs'
+      format: 'cjs',
+      sourcemap: true
     }
   }
 ];

packages/node/src/db/BetterSQLite3DBAdapter.ts

@@ -57,8 +57,7 @@ export class BetterSQLite3DBAdapter extends BaseObserver<DBAdapterListener> impl
     }
 
     const openWorker = async (isWriter: boolean) => {
-      // https://nodejs.org/api/esm.html#differences-between-es-modules-and-commonjs
-      const isCommonJsModule = '__filename' in global;
+      const isCommonJsModule = import.meta.isBundlingToCommonJs ?? false;
       let worker: Worker;
       const workerName = isWriter ? `write ${dbFilePath}` : `read ${dbFilePath}`;
 

packages/node/src/db/SqliteWorker.ts

@@ -98,8 +98,7 @@ class BetterSqliteWorker implements AsyncDatabaseOpener {
 }
 
 const loadExtension = (db: Database) => {
-  // https://nodejs.org/api/esm.html#differences-between-es-modules-and-commonjs
-  const isCommonJsModule = '__filename' in global;
+  const isCommonJsModule = import.meta.isBundlingToCommonJs ?? false;
 
   const platform = OS.platform();
   let extensionPath: string;

packages/node/src/node.d.ts

@@ -0,0 +1,3 @@
+interface ImportMeta {
+    isBundlingToCommonJs?: boolean // This property is set by our rollup configuration
+}