		@@ -0,1 +1,2 @@
		var path = require( 'path' );
		var babel = require( 'babel-core' );
		@@ -21,14 +22,7 @@ var createFilter = require( 'rollup-pluginutils' ).createFilter;

		// ensure es6.modules are blacklisted
		if ( options.whitelist ) {
		index = options.whitelist.indexOf( 'es6.modules' );
		if ( ~index ) options.whitelist.splice( index, 1 );
		}
		// preflight check
		var check = babel.transform( 'export default class Foo {}', assign({ filename: path.resolve( 'test.js' ) }, options ) ).code;
		if ( ~check.indexOf( 'function _classCallCheck' ) ) throw new Error( 'External helpers are not enabled. Please add the "external-helpers-2" plugin or use the "es2015-rollup" preset. See https://github.com/rollup/rollup-plugin-babel#TK for more information' );
		if ( !~check.indexOf( 'export default' ) ) throw new Error( 'It looks like your Babel configuration specifies a module transformer. Please disable it. If you\'re using the "es2015" preset, consider using "es2015-rollup" instead. See https://github.com/rollup/rollup-plugin-babel#TK for more information' );

		if ( !options.blacklist ) options.blacklist = [];
		index = options.blacklist.indexOf( 'es6.modules' );
		if ( !~index ) options.blacklist.push( 'es6.modules' );

		options.externalHelpers = true;

		return {
		@@ -35,0 +29,0 @@ transform: function ( code, id ) {

package.json

README.md

		# rollup-plugin-babel

		experimental, depends on unreleased version of Rollup

		Seamless integration between Rollup and Babel.
		@@ -11,3 +9,3 @@

		* run the code through Babel first, being careful to disable the `es6.modules` transformer, or
		* run the code through Babel first, being careful to exclude the module transformer, or
		* run the code through Rollup first, and then pass it to Babel.
		@@ -51,4 +49,36 @@

		## Babel 5

		The latest version of rollup-plugin-babel is designed to work with Babel 6. To use rollup-plugin-babel with Babel 5, install a 1.x version:

		```bash
		npm install --save-dev rollup-plugin-babel@1
		```


		## Babel 6

		With Babel 5, rollup-plugin-babel overrides the configuration to ensure that module syntax is left alone and that external helpers are collected for inclusion at the top of the bundle.

		Babel 6 works differently – there's no `blacklist` or `externalHelpers` options. Instead of using the `es2015` preset, install and use [babel-preset-es2015-rollup](https://github.com/rollup/babel-preset-es2015-rollup):

		```js
		// .babelrc
		{
		"presets": [ "es2015-rollup" ]
		}
		```

		If you're not using the preset, be sure to include the external helpers plugin:

		```js
		// .babelrc
		{
		"plugins": [ "external-helpers-2" ]
		}
		```


		## License

		MIT

test/test.js

		@@ -8,3 +8,6 @@ var assert = require( 'assert' );
		describe( 'rollup-plugin-babel', function () {
		this.timeout( 5000 );

		it( 'runs code through babel', function () {
		var start = Date.now();
		return rollup.rollup({
		@@ -14,6 +17,11 @@ entry: 'samples/basic/main.js',
		}).then( function ( bundle ) {
		console.log( 'bundled in %s ms', Date.now() - start );

		start = Date.now();
		const generated = bundle.generate();
		console.log( 'generated in %s ms', Date.now() - start );

		const code = generated.code;

		assert.ok( code.indexOf( 'const' ) === -1, generated.code );
		assert.ok( code.indexOf( 'const' ) === -1, code );
		});
		@@ -31,2 +39,3 @@ });
		assert.ok( code.indexOf( 'babelHelpers.classCallCheck =' ) !== -1, generated.code );
		assert.ok( code.indexOf( 'var _createClass =' ) === -1, generated.code );
		});
		@@ -33,0 +42,0 @@ });

test/samples/class/.babelrc

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