babel-minify/lib/options-parser.js

✂️ An ES6+ aware minifier based on the Babel toolchain (beta)

"use strict";

function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }

const DELIMITTER = ".";

module.exports = function parseOpts(argv) {
  return dotsToObject(argv);
};
/**
 * Converts and Object of the form - {key<dot-notation>: value} to deep object
 * following rules of minify preset options
 *
 * A preset option can be `true` | `object` which enables the particular plugin
 * `false` disables the plugin
 *
 * @param input - An Object with dot-notation keys
 */


function dotsToObject(input) {
  const dots = Object.keys(input).map(key => [...key.split(DELIMITTER), input[key]]); // sort to ensure dot notation occurs after parent key

  dots.sort((a, b) => {
    if (a.length === b.length) {
      return a[0] > b[0];
    }

    return a.length > b.length;
  });
  const obj = {};

  var _iterator = _createForOfIteratorHelper(dots),
      _step;

  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      const parts = _step.value;
      add(obj, ...parts);
    } // make object

  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }

  function add(o, first, ...rest) {
    if (rest.length < 1) {
      // something went wrong
      throw new Error("Option Parse Error");
    } else if (rest.length === 1) {
      // there is only a key and a value
      // for example: mangle: true
      o[first] = rest[0];
    } else {
      // create the current path and recurse if the plugin is enabled
      if (!hop(o, first) || o[first] === true) {
        // if the plugin is enabled
        o[first] = {};
      }

      if (o[first] !== false) {
        // if the plugin is NOT disabled then recurse
        add(o[first], ...rest);
      }
    }
  }

  return obj;
}

function hop(o, key) {
  return Object.prototype.hasOwnProperty.call(o, key);
}