@dword-design/depcheck/dist/utils/index.js

Check dependencies in your node module

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.evaluate = evaluate;
Object.defineProperty(exports, "getScripts", {
  enumerable: true,
  get: function () {
    return _getScripts.default;
  }
});
exports.loadModuleData = void 0;
exports.readJSON = readJSON;
exports.tryRequire = tryRequire;
exports.wrapToArray = wrapToArray;
exports.wrapToMap = wrapToMap;
var _path = _interopRequireDefault(require("path"));
var _vm = _interopRequireDefault(require("vm"));
var _moduleRoot = _interopRequireDefault(require("./module-root"));
var _getScripts = _interopRequireDefault(require("./get-scripts"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function readJSON(filePath) {
  return require(filePath); // eslint-disable-line global-require
}

function evaluate(code) {
  const exports = {};
  const sandbox = {
    exports,
    module: {
      exports
    }
  };
  _vm.default.runInNewContext(code, sandbox);
  return sandbox.module.exports;
}
function memoize(func, n) {
  const cache = new Map();
  return function (...args) {
    const key = JSON.stringify(args);
    if (cache.has(key)) {
      return cache.get(key);
    }
    const result = func(...args);
    cache.set(key, result);
    if (cache.size > n) {
      const oldestKey = cache.keys().next().value;
      cache.delete(oldestKey);
    }
    return result;
  };
}
function loadModuleDataRaw(moduleName, rootDir) {
  try {
    const file = _path.default.join((0, _moduleRoot.default)(moduleName, {
      cwd: rootDir
    }), 'package.json');
    return {
      path: _path.default.dirname(file),
      metadata: readJSON(file)
    };
  } catch (error) {
    return {
      path: null,
      metadata: null
    };
  }
}
const loadModuleData = exports.loadModuleData = memoize(loadModuleDataRaw, 500);
function tryRequire(module, paths = []) {
  try {
    let moduleName = module;
    if (paths.length > 0) moduleName = require.resolve(moduleName, {
      paths
    });
    return require(moduleName); // eslint-disable-line global-require
  } catch (e) {
    return null;
  }
}
function wrapToArray(obj) {
  if (!obj) {
    return [];
  }
  if (Array.isArray(obj)) {
    return obj;
  }
  return [obj];
}
function wrapToMap(obj) {
  if (!obj) {
    return {};
  }
  return obj;
}