feat: add noIncompleteNsImportDetection assumption to plugin-transform-modules-commonjs (#13290)

packages/babel-core/src/config/validation/options.ts

@@ -265,6 +265,7 @@ export const assumptionsNames = new Set<string>([
   "mutableTemplateObject",
   "noClassCalls",
   "noDocumentAll",
+  "noIncompleteNsImportDetection",
   "noNewArrows",
   "objectRestNoSymbols",
   "privateFieldsAsProperties",

packages/babel-helper-create-class-features-plugin/src/index.ts

@@ -46,7 +46,7 @@ export function createClassFeaturePlugin({
   feature,
   loose,
   manipulateOptions,
-  // TODO(Babel 8): Remove the default falue
+  // TODO(Babel 8): Remove the default value
   api = { assumption: () => void 0 },
 }: Options) {
   const setPublicClassFields = api.assumption("setPublicClassFields");

packages/babel-helper-module-transforms/src/index.ts

@@ -45,6 +45,7 @@ export function rewriteModuleStatementsAndPrepareHeader(
 
     constantReexports = loose,
     enumerableModuleMeta = loose,
+    noIncompleteNsImportDetection,
   }: {
     exportName?;
     strict;
@@ -57,6 +58,7 @@ export function rewriteModuleStatementsAndPrepareHeader(
     esNamespaceOnly?;
     constantReexports?;
     enumerableModuleMeta?;
+    noIncompleteNsImportDetection?: boolean;
   },
 ) {
   validateImportInteropOption(importInterop);
@@ -102,7 +104,12 @@ export function rewriteModuleStatementsAndPrepareHeader(
 
   // Create all of the statically known named exports.
   headers.push(
-    ...buildExportInitializationStatements(path, meta, constantReexports),
+    ...buildExportInitializationStatements(
+      path,
+      meta,
+      constantReexports,
+      noIncompleteNsImportDetection,
+    ),
   );
 
   return { meta, headers };
@@ -388,6 +395,7 @@ function buildExportInitializationStatements(
   programPath: NodePath,
   metadata: ModuleMetadata,
   constantReexports: boolean = false,
+  noIncompleteNsImportDetection = false,
 ) {
   const initStatements = [];
 
@@ -413,15 +421,17 @@ function buildExportInitializationStatements(
     }
   }
 
-  initStatements.push(
-    ...chunk(exportNames, 100).map(members => {
-      return buildInitStatement(
-        metadata,
-        members,
-        programPath.scope.buildUndefinedNode(),
-      );
-    }),
-  );
+  if (!noIncompleteNsImportDetection) {
+    initStatements.push(
+      ...chunk(exportNames, 100).map(members => {
+        return buildInitStatement(
+          metadata,
+          members,
+          programPath.scope.buildUndefinedNode(),
+        );
+      }),
+    );
+  }
 
   return initStatements;
 }

packages/babel-plugin-transform-modules-commonjs/src/index.js

@@ -40,6 +40,8 @@ export default declare((api, options) => {
     api.assumption("constantReexports") ?? options.loose;
   const enumerableModuleMeta =
     api.assumption("enumerableModuleMeta") ?? options.loose;
+  const noIncompleteNsImportDetection =
+    api.assumption("noIncompleteNsImportDetection") ?? false;
 
   if (
     typeof lazy !== "boolean" &&
@@ -186,6 +188,7 @@ export default declare((api, options) => {
                 /\.mjs$/.test(state.filename)
                   ? mjsStrictNamespace
                   : strictNamespace,
+              noIncompleteNsImportDetection,
             },
           );
 

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export-default/input.mjs

@@ -0,0 +1 @@
+export default foo;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export-default/output.js

@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+var _default = foo;
+exports.default = _default;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export-from/input.mjs

@@ -0,0 +1 @@
+export { foo } from "foo";

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export-from/options.json

@@ -0,0 +1,7 @@
+{
+  "assumptions": {
+    "noIncompleteNsImportDetection": true,
+    "constantReexports": true
+  },
+  "plugins": ["transform-modules-commonjs"]
+}

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export-from/output.js

@@ -0,0 +1,9 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _foo = require("foo");
+
+exports.foo = _foo.foo;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export/input.mjs

@@ -0,0 +1 @@
+export var foo = 2;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/export/output.js

@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+var foo = 2;
+exports.foo = foo;

packages/babel-plugin-transform-modules-commonjs/test/fixtures/assumptions-noIncompleteNsImportDetection/options.json

@@ -0,0 +1,6 @@
+{
+  "assumptions": {
+    "noIncompleteNsImportDetection": true
+  },
+  "plugins": ["transform-modules-commonjs"]
+}