fix: wrap generated require() calls in a promise

Author: njoyard

babel-plugin-import-meta-glob/index.js

@@ -53,17 +53,35 @@ function ImportMetaGlobPlugin ({ types: t }) {
     path.replaceWith(t.objectExpression(newObjectProperties));
   }
 
+  const generateImportCall = (file, useImport) => {
+    if (useImport) {
+      return t.callExpression(
+        t.identifier('import'),
+        [t.stringLiteral(file)]
+      );
+    } else {
+      return t.callExpression(
+        t.memberExpression(
+          t.identifier('Promise'),
+          t.identifier('resolve')
+        ),
+        [
+          t.callExpression(
+            t.identifier('require'),
+            [t.stringLiteral(file)]
+          )
+        ]
+      );
+    }
+  }
+
   const transformLazyImportMetaGlob = (path, files, useImport) => {
-    const functionIdentifier = useImport ? 'import' : 'require';
     const newObjectProperties = files.map((file) => {
       return t.objectProperty(
         t.stringLiteral(file),
         t.arrowFunctionExpression(
           [],
-          t.callExpression(
-            t.identifier(functionIdentifier),
-            [t.stringLiteral(file)]
-          )
+          generateImportCall(file, useImport)
         )
       );
     });

babel-plugin-import-meta-glob/tests/lazy-import.test.js

@@ -10,8 +10,8 @@ test('it transforms import.meta.glob to lazy import', () => {
   });
   expect(output.code).toMatchInlineSnapshot(`
     "const modules = {
-      "tests/fixtures/_fixture-b": () => require("tests/fixtures/_fixture-b"),
-      "tests/fixtures/_fixture-a": () => require("tests/fixtures/_fixture-a")
+      "tests/fixtures/_fixture-b": () => Promise.resolve(require("tests/fixtures/_fixture-b")),
+      "tests/fixtures/_fixture-a": () => Promise.resolve(require("tests/fixtures/_fixture-a"))
     };"
   `);
 })