Split export extensions into 2 different plugins, update stage presets (#6080)

packages/babel-plugin-transform-export-default/README.md

@@ -1,18 +1,17 @@
-# babel-plugin-transform-export-extensions
+# babel-plugin-transform-export-default
 
-> Compile additional export-from statements to ES2015
+> Compile export-default-from statements to ES2015
 
 ## Example
 
 ```js
-export * as ns from 'mod';
 export v from 'mod';
 ```
 
 ## Installation
 
 ```sh
-npm install --save-dev babel-plugin-transform-export-extensions
+npm install --save-dev babel-plugin-transform-export-default
 ```
 
 ## Usage
@@ -23,25 +22,24 @@ npm install --save-dev babel-plugin-transform-export-extensions
 
 ```json
 {
-  "plugins": ["transform-export-extensions"]
+  "plugins": ["transform-export-default"]
 }
 ```
 
 ### Via CLI
 
 ```sh
-babel --plugins transform-export-extensions script.js
+babel --plugins transform-export-default script.js
 ```
 
 ### Via Node API
 
 ```javascript
 require("babel-core").transform("code", {
-  plugins: ["transform-export-extensions"]
+  plugins: ["transform-export-default"]
 });
 ```
 ## References
 
 * ~~[Proposal: Additional export-from statements in ES7](https://github.com/leebyron/ecmascript-more-export-from)~~ (Withdrawn)
-* [ECMAScript Proposal: export ns from](https://github.com/leebyron/ecmascript-export-ns-from)
 * [ECMAScript Proposal: export default from](https://github.com/leebyron/ecmascript-export-default-from)

packages/babel-plugin-transform-export-default/package.json

@@ -1,8 +1,8 @@
 {
-  "name": "babel-plugin-transform-export-extensions",
+  "name": "babel-plugin-transform-export-default",
   "version": "7.0.0-alpha.19",
-  "description": "Compile export extensions to ES2015",
+  "description": "Compile export default to ES2015",
-  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-export-extensions",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-export-default",
   "license": "MIT",
   "main": "lib/index.js",
   "keywords": [

packages/babel-plugin-transform-export-default/src/index.js

@@ -2,13 +2,10 @@ import syntaxExportExtensions from "babel-plugin-syntax-export-extensions";
 
 export default function({ types: t }) {
   function build(node, nodes, scope) {
-    const first = node.specifiers[0];
+    const hasNoExportDefault = node.specifiers.every(
-    if (
+      specifier => !t.isExportDefaultSpecifier(specifier),
-      !t.isExportNamespaceSpecifier(first) &&
+    );
-      !t.isExportDefaultSpecifier(first)
+    if (hasNoExportDefault) return;
-    ) {
-      return;
-    }
 
     const specifier = node.specifiers.shift();
     const uid = scope.generateUidIdentifier(specifier.exported.name);
@@ -19,7 +16,6 @@ export default function({ types: t }) {
     } else {
       newSpecifier = t.importDefaultSpecifier(uid);
     }
-
     nodes.push(t.importDeclaration([newSpecifier], node.source));
     nodes.push(
       t.exportNamedDeclaration(null, [

packages/babel-plugin-transform-export-default/test/fixtures/export-default/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", "transform-export-default"]
+}

packages/babel-plugin-transform-export-extensions/test/fixtures/export-extensions/namespace-default/options.json

@@ -1,3 +0,0 @@
-{
-  "plugins": ["external-helpers", "transform-export-extensions"]
-}

packages/babel-plugin-transform-export-extensions/test/fixtures/export-extensions/options.json

@@ -1,3 +0,0 @@
-{
-  "plugins": ["external-helpers", "transform-export-extensions"]
-}

packages/babel-plugin-transform-export-namespace/.npmignore

@@ -0,0 +1,3 @@
+src
+test
+*.log

packages/babel-plugin-transform-export-namespace/README.md

@@ -0,0 +1,45 @@
+# babel-plugin-transform-export-namespace
+
+> Compile export-ns-from statements to ES2015
+
+## Example
+
+```js
+export * as ns from 'mod';
+```
+
+## Installation
+
+```sh
+npm install --save-dev babel-plugin-transform-export-namespace
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["transform-export-namespace"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins transform-export-namespace script.js
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  plugins: ["transform-export-namespace"]
+});
+```
+## References
+
+* ~~[Proposal: Additional export-from statements in ES7](https://github.com/leebyron/ecmascript-more-export-from)~~ (Withdrawn)
+* [ECMAScript Proposal: export ns from](https://github.com/leebyron/ecmascript-export-ns-from)

packages/babel-plugin-transform-export-namespace/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "babel-plugin-transform-export-namespace",
+  "version": "7.0.0-alpha.19",
+  "description": "Compile export namespace to ES2015",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-export-namespace",
+  "license": "MIT",
+  "main": "lib/index.js",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "dependencies": {
+    "babel-plugin-syntax-export-extensions": "7.0.0-alpha.19"
+  },
+  "devDependencies": {
+    "babel-helper-plugin-test-runner": "7.0.0-alpha.19"
+  }
+}

packages/babel-plugin-transform-export-namespace/src/index.js

@@ -0,0 +1,46 @@
+import syntaxExportExtensions from "babel-plugin-syntax-export-extensions";
+
+export default function({ types: t }) {
+  function build(node, nodes, scope) {
+    const hasNoExportNs = node.specifiers.every(
+      specifier => !t.isExportNamespaceSpecifier(specifier),
+    );
+    if (hasNoExportNs) return;
+
+    const specifier = node.specifiers.shift();
+    const uid = scope.generateUidIdentifier(specifier.exported.name);
+
+    let newSpecifier;
+    if (t.isExportNamespaceSpecifier(specifier)) {
+      newSpecifier = t.importNamespaceSpecifier(uid);
+    } else {
+      newSpecifier = t.importDefaultSpecifier(uid);
+    }
+    nodes.push(t.importDeclaration([newSpecifier], node.source));
+    nodes.push(
+      t.exportNamedDeclaration(null, [
+        t.exportSpecifier(uid, specifier.exported),
+      ]),
+    );
+
+    build(node, nodes, scope);
+  }
+
+  return {
+    inherits: syntaxExportExtensions,
+
+    visitor: {
+      ExportNamedDeclaration(path) {
+        const { node, scope } = path;
+        const nodes = [];
+        build(node, nodes, scope);
+        if (!nodes.length) return;
+
+        if (node.specifiers.length >= 1) {
+          nodes.push(node);
+        }
+        path.replaceWithMultiple(nodes);
+      },
+    },
+  };
+}

packages/babel-plugin-transform-export-namespace/test/fixtures/export-namespace/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", "transform-export-namespace"]
+}

packages/babel-plugin-transform-export-namespace/test/index.js

@@ -0,0 +1,3 @@
+import runner from "babel-helper-plugin-test-runner";
+
+runner(__dirname);

packages/babel-preset-stage-1/package.json

@@ -9,7 +9,7 @@
   "main": "lib/index.js",
   "dependencies": {
     "babel-plugin-transform-decorators": "7.0.0-alpha.19",
-    "babel-plugin-transform-export-extensions": "7.0.0-alpha.19",
+    "babel-plugin-transform-export-default": "7.0.0-alpha.19",
     "babel-plugin-transform-optional-chaining": "7.0.0-alpha.19",
     "babel-preset-stage-2": "7.0.0-alpha.19"
   }

packages/babel-preset-stage-1/src/index.js

@@ -1,7 +1,7 @@
 import presetStage2 from "babel-preset-stage-2";
 
 import transformDecorators from "babel-plugin-transform-decorators";
-import transformExportExtensions from "babel-plugin-transform-export-extensions";
+import transformExportDefault from "babel-plugin-transform-export-default";
 import transformOptionalChaining from "babel-plugin-transform-optional-chaining";
 
 export default function() {
@@ -9,7 +9,7 @@ export default function() {
     presets: [presetStage2],
     plugins: [
       transformDecorators,
-      transformExportExtensions,
+      transformExportDefault,
       transformOptionalChaining,
     ],
   };

packages/babel-preset-stage-2/package.json

@@ -9,6 +9,7 @@
   "main": "lib/index.js",
   "dependencies": {
     "babel-plugin-transform-function-sent": "7.0.0-alpha.19",
+    "babel-plugin-transform-export-namespace": "7.0.0-alpha.19",
     "babel-plugin-transform-numeric-separator": "7.0.0-alpha.19",
     "babel-preset-stage-3": "7.0.0-alpha.19"
   }

packages/babel-preset-stage-2/src/index.js

@@ -1,11 +1,16 @@
 import presetStage3 from "babel-preset-stage-3";
 
 import transformFunctionSent from "babel-plugin-transform-function-sent";
+import transformExportNamespace from "babel-plugin-transform-export-namespace";
 import transformNumericSeparator from "babel-plugin-transform-numeric-separator";
 
 export default function() {
   return {
     presets: [presetStage3],
-    plugins: [transformFunctionSent, transformNumericSeparator],
+    plugins: [
+      transformFunctionSent,
+      transformExportNamespace,
+      transformNumericSeparator,
+    ],
   };
 }

yarn.lock

@@ -853,6 +853,12 @@ babel-plugin-transform-export-extensions@7.0.0-alpha.18:
   dependencies:
     babel-plugin-syntax-export-extensions "7.0.0-alpha.18"
 
+babel-plugin-transform-export-extensions@7.0.0-alpha.19:
+  version "7.0.0-alpha.19"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-export-extensions/-/babel-plugin-transform-export-extensions-7.0.0-alpha.19.tgz#664ed4cd942838bee1287ff81588905614b644aa"
+  dependencies:
+    babel-plugin-syntax-export-extensions "7.0.0-alpha.19"
+
 babel-plugin-transform-flow-strip-types@7.0.0-alpha.18:
   version "7.0.0-alpha.18"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-flow-strip-types/-/babel-plugin-transform-flow-strip-types-7.0.0-alpha.18.tgz#1a15c0b0496ea4c7991b43d50b8009412a5f7364"