fix: 🐛 workaround due mako's interop add default to a empty file

.github/workflows/ci.yml

@@ -16,18 +16,17 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node_version: [12.x, 14.x]
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        node_version: [12, 14]
+        os: [ubuntu-latest, macos-13, windows-latest]
       fail-fast: false
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
       - name: Use Node.js ${{ matrix.node_version }}
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node_version }}
-          registry-url: 'https://registry.yarnpkg.com'
       - name: restore lerna
         id: cache
         uses: actions/cache@v2

packages/runtime/src/Plugin/Plugin.ts

@@ -41,6 +41,11 @@ export default class Plugin {
     assert(!!plugin.apply, `register failed, plugin.apply must supplied`);
     assert(!!plugin.path, `register failed, plugin.path must supplied`);
     Object.keys(plugin.apply).forEach((key) => {
+      // workaround for https://github.com/umijs/mako/issues/1657
+      // root cause: mako bundler will add a default export to an empty module
+      if (key === 'default') {
+        return;
+      }
       assert(
         this.validKeys.indexOf(key) > -1,
         `register failed, invalid key ${key} from plugin ${plugin.path}.`,