Add noInterop option to babel-plugin-transform-es2015-modules-commonjs.

The intent of this option is to toggle module interop behavior. When `true`
no `interopRequireXXX` helper invocations will be emitted.

(cherry picked from commit 0d1edb9811694d25df2ef75a1e8de773624ec6b8)

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-export-from/actual.js

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

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-export-from/expected.js

@@ -0,0 +1,13 @@
+define(['exports', 'foo'], function (exports, _foo) {
+  'use strict';
+
+  Object.defineProperty(exports, "__esModule", {
+    value: true
+  });
+  Object.defineProperty(exports, 'default', {
+    enumerable: true,
+    get: function () {
+      return _foo.default;
+    }
+  });
+});

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-export-from/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-es2015-modules-amd", { "noInterop": true }]]
+}

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-import-default-only/actual.js

@@ -0,0 +1,3 @@
+import foo from "foo";
+
+foo;

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-import-default-only/expected.js

@@ -0,0 +1,5 @@
+define(["foo"], function (_foo) {
+  "use strict";
+
+  _foo.default;
+});

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-import-default-only/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-es2015-modules-amd", { "noInterop": true }]]
+}

packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js

@@ -150,6 +150,7 @@ export default function () {
           this.ranCommonJS = true;
 
           const strict = !!this.opts.strict;
+          const noInterop = !!this.opts.noInterop;
 
           const { scope } = path;
 
@@ -326,7 +327,7 @@ export default function () {
                   } else if (specifier.isExportDefaultSpecifier()) {
                     // todo
                   } else if (specifier.isExportSpecifier()) {
-                    if (specifier.node.local.name === "default") {
+                    if (!noInterop && specifier.node.local.name === "default") {
                       topNodes.push(buildExportsFrom(t.stringLiteral(specifier.node.exported.name),
                         t.memberExpression(
                           t.callExpression(this.addHelper("interopRequireDefault"), [ref]),
@@ -370,7 +371,7 @@ export default function () {
               for (let i = 0; i < specifiers.length; i++) {
                 const specifier = specifiers[i];
                 if (t.isImportNamespaceSpecifier(specifier)) {
-                  if (strict) {
+                  if (strict || noInterop) {
                     remaps[specifier.local.name] = uid;
                   } else {
                     const varDecl = t.variableDeclaration("var", [
@@ -401,7 +402,7 @@ export default function () {
                   if (specifier.imported.name === "default") {
                     if (wildcard) {
                       target = wildcard;
-                    } else {
+                    } else if (!noInterop) {
                       target = wildcard = path.scope.generateUidIdentifier(uid.name);
                       const varDecl = t.variableDeclaration("var", [
                         t.variableDeclarator(

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/export-from/actual.js

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

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/export-from/expected.js

@@ -0,0 +1,14 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _foo = require('foo');
+
+Object.defineProperty(exports, 'default', {
+  enumerable: true,
+  get: function () {
+    return _foo.default;
+  }
+});

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/import-default-only/actual.js

@@ -0,0 +1,3 @@
+import foo from "foo";
+
+foo();

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/import-default-only/expected.js

@@ -0,0 +1,5 @@
+"use strict";
+
+var _foo = require("foo");
+
+(0, _foo.default)();

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/import-wildcard/actual.js

@@ -0,0 +1,4 @@
+import * as foo from 'foo';
+
+foo.bar();
+foo.baz();

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/import-wildcard/expected.js

@@ -0,0 +1,6 @@
+'use strict';
+
+var _foo = require('foo');
+
+_foo.bar();
+_foo.baz();

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/noInterop/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-es2015-modules-commonjs", { "noInterop": true }]]
+}

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/import-wildcard/actual.js

@@ -0,0 +1,4 @@
+import * as foo from 'foo';
+
+foo.bar();
+foo.baz();

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/strict/import-wildcard/expected.js

@@ -0,0 +1,6 @@
+'use strict';
+
+var _foo = require('foo');
+
+_foo.bar();
+_foo.baz();