canonical/node_modules/eslint-plugin-import/lib/core/parse.js

Canonical code style linter and formatter for JavaScript, SCSS and CSS.

'use strict';

var _Object$assign = require('babel-runtime/core-js/object/assign')['default'];

var _interopRequireDefault = require('babel-runtime/helpers/interop-require-default')['default'];

Object.defineProperty(exports, '__esModule', {
  value: true
});

var _fs = require('fs');

var _fs2 = _interopRequireDefault(_fs);

var defaultParseOptions = {
  ecmaVersion: 6, // for espree, esprima. not needed for babylon
  sourceType: 'module'
};

exports['default'] = function (path) {
  var _ref = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];

  var settings = _ref.settings;
  var ecmaFeatures = _ref.ecmaFeatures;

  var parser = settings && settings['import/parser'] || 'babylon';

  var _require = require(parser);

  var parse = _require.parse;
  var options = getOptions(parser, settings, ecmaFeatures);

  var ast = parse(_fs2['default'].readFileSync(path, { encoding: 'utf8' }), options);

  // bablyon returns top-level "File" node.
  return ast.type === 'File' ? ast.program : ast;
};

function getOptions(parser, settings, ecmaFeatures) {

  var options = _Object$assign({}, defaultParseOptions, settings && settings['import/parse-options']);

  function inferFeature(feat) {
    if (ecmaFeatures[feat] && options.plugins.indexOf(feat) < 0) {
      options.plugins.push(feat);
    }
  }

  // detect and handle "jsx" ecmaFeature
  if (parser === 'babylon') {
    if (ecmaFeatures) {
      options.plugins = options.plugins ? options.plugins.slice() : [];
      inferFeature('jsx');
      inferFeature('flow');
    }
  }

  return options;
}
module.exports = exports['default'];
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