parcel-bundler/lib/transforms/babel/babel6.js

Blazing fast, zero configuration web application bundler

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));

const localRequire = require('../../utils/localRequire');

const _require = require('./astConverter'),
      babel6toBabel7 = _require.babel6toBabel7;

function babel6(_x, _x2) {
  return _babel.apply(this, arguments);
}

function _babel() {
  _babel = (0, _asyncToGenerator2.default)(function* (asset, options) {
    let babel = yield localRequire('babel-core', asset.name);
    let config = options.config;
    config.code = false;
    config.ast = true;
    config.filename = asset.name;
    config.babelrc = false;
    config.parserOpts = Object.assign({}, config.parserOpts, {
      allowReturnOutsideFunction: true,
      allowHashBang: true,
      ecmaVersion: Infinity,
      strictMode: false,
      sourceType: 'module',
      locations: true
    }); // Passing a list of plugins as part of parserOpts seems to override any custom
    // syntax plugins a user might have added (e.g. decorators). We add dynamicImport
    // using a plugin instead.

    config.plugins = (config.plugins || []).concat(dynamicImport);
    let res = babel.transform(asset.contents, config);

    if (res.ast) {
      asset.ast = babel6toBabel7(res.ast);
      asset.isAstDirty = true;
    }
  });
  return _babel.apply(this, arguments);
}

function dynamicImport() {
  return {
    manipulateOptions(opts, parserOpts) {
      parserOpts.plugins.push('dynamicImport');
    }

  };
}

module.exports = babel6;