depcheck/dist/special/babel.js

Check dependencies in your node module

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = parseBabel;

var _path = _interopRequireDefault(require("path"));

var _lodash = _interopRequireDefault(require("lodash"));

var _cliTools = require("../utils/cli-tools");

var _file = require("../utils/file");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function parse(content) {
  try {
    return JSON.parse(content);
  } catch (error) {
    return {}; // ignore parse error silently
  }
}

function isPlugin(target, plugin) {
  return _lodash.default.isString(target) ? target === plugin || target === `babel-plugin-${plugin}` : target[0] === plugin || target[0] === `babel-plugin-${plugin}`;
}

function contain(array, dep, prefix, scope) {
  if (!array) {
    return false;
  } // extract name if wrapping with options


  const names = array.map(item => _lodash.default.isString(item) ? item : item[0]);

  if (names.indexOf(dep) !== -1) {
    return true;
  }

  const fullPrefix = scope ? `${scope}/${prefix}` : prefix;

  if (prefix && dep.indexOf(fullPrefix) === 0) {
    const identifier = dep.substring(fullPrefix.length);
    return contain(array, scope ? `${scope}/${identifier}` : identifier, false);
  }

  return false;
}

function getReactTransforms(deps, plugins) {
  const transforms = (0, _lodash.default)(plugins || []).filter(plugin => isPlugin(plugin, 'react-transform')).map(([, plugin]) => plugin.transforms.map(({
    transform
  }) => transform)).first();
  return _lodash.default.intersection(transforms, deps);
}

function filter(deps, options) {
  const presets = deps.filter(dep => contain(options.presets, dep, 'babel-preset-'));
  const presets7 = deps.filter(dep => contain(options.presets, dep, 'preset-', '@babel'));
  const plugins = deps.filter(dep => contain(options.plugins, dep, 'babel-plugin-'));
  const plugins7 = deps.filter(dep => contain(options.plugins, dep, 'plugin-', '@babel'));
  const reactTransforms = getReactTransforms(deps, options.plugins);
  return _lodash.default.uniq(presets.concat(presets7, plugins, plugins7, reactTransforms));
}

function checkOptions(deps, options = {}) {
  const optDeps = filter(deps, options);
  const envDeps = (0, _lodash.default)(options.env).values().map(env => filter(deps, env)).flatten().value();
  return optDeps.concat(envDeps);
}

const regex = /^(\.babelrc|babelrc\.js|babel\.config\.js)?$/;

async function parseBabel(filename, deps, rootDir) {
  const config = await (0, _cliTools.loadConfig)('babel', regex, filename, rootDir);

  if (config) {
    return checkOptions(deps, config);
  }

  if (_path.default.basename(filename) === 'package.json') {
    const content = await (0, _file.getContent)(filename);
    const metadata = parse(content);
    return checkOptions(deps, metadata.babel);
  }

  return [];
}

module.exports = exports.default;