atom-nuclide/pkg/nuclide-format-js/lib/settings.js

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

/*
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the license found in the LICENSE file in
 * the root directory of this source tree.
 */

var _slicedToArray = (function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i['return']) _i['return'](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError('Invalid attempt to destructure non-iterable instance'); } }; })();

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

exports.observeSettings = observeSettings;
exports.calculateOptions = calculateOptions;

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

var _commonsAtomFeatureConfig2;

function _commonsAtomFeatureConfig() {
  return _commonsAtomFeatureConfig2 = _interopRequireDefault(require('../../commons-atom/featureConfig'));
}

var _nuclideFormatJsCommon2;

function _nuclideFormatJsCommon() {
  return _nuclideFormatJsCommon2 = _interopRequireDefault(require('../../nuclide-format-js-common'));
}

// Nuclide package settings used to calculate the module map,
// the blacklist, and control the plugin behavior.

var createModuleMap = (_nuclideFormatJsCommon2 || _nuclideFormatJsCommon()).default.createModuleMap;

// We need this in array formats.
var defaultAliases = Array.from((_nuclideFormatJsCommon2 || _nuclideFormatJsCommon()).default.defaultAliases);
var defaultBuiltIns = Array.from((_nuclideFormatJsCommon2 || _nuclideFormatJsCommon()).default.defaultBuiltIns);
var defaultBuiltInTypes = Array.from((_nuclideFormatJsCommon2 || _nuclideFormatJsCommon()).default.defaultBuiltInTypes);

/**
 * Observes the relevant Nuclide package settings.
 */

function observeSettings(callback) {
  return (_commonsAtomFeatureConfig2 || _commonsAtomFeatureConfig()).default.observe('nuclide-format-js', function (settings) {
    return callback(_extends({}, settings, {
      aliases: fixAliases(settings.aliases)
    }));
  });
}

/**
 * Calculates the current options according to the Nuclide configuration object.
 * This may get expensive in the future as the module map becomes smarter.
 */

function calculateOptions(settings) {
  return {
    blacklist: calculateBlacklist(settings),
    moduleMap: calculateModuleMap(settings)
  };
}

/**
 * Calculates a module map from the settings.
 */
function calculateModuleMap(settings) {
  // Construct the aliases.
  var aliases = new Map(settings.aliases);
  for (var entry of defaultAliases) {
    var _entry = _slicedToArray(entry, 2);

    var key = _entry[0];
    var _value = _entry[1];

    if (!aliases.has(key)) {
      aliases.set(key, _value);
    }
  }

  // Construct the built ins.
  var builtIns = new Set(defaultBuiltIns);
  for (var builtIn of settings.builtIns) {
    builtIns.add(builtIn);
  }

  // Construct built in types.
  var builtInTypes = new Set(defaultBuiltInTypes);
  for (var builtInType of settings.builtInTypes) {
    builtInTypes.add(builtInType);
  }

  // And then calculate the module map.
  return createModuleMap({
    paths: [],
    pathsToRelativize: [],
    aliases: aliases,
    aliasesToRelativize: new Map(),
    builtIns: builtIns,
    builtInTypes: builtInTypes
  });
}

/**
 * Calculates the blacklist from the settings.
 */
function calculateBlacklist(settings) {
  var blacklist = new Set();
  if (!settings.nuclideFixHeader) {
    blacklist.add('nuclide.fixHeader');
  }
  if (!settings.requiresTransferComments) {
    blacklist.add('requires.transferComments');
  }
  if (!settings.requiresRemoveUnusedRequires) {
    blacklist.add('requires.removeUnusedRequires');
  }
  if (!settings.requiresAddMissingRequires) {
    blacklist.add('requires.addMissingRequires');
  }
  if (!settings.requiresRemoveUnusedTypes) {
    blacklist.add('requires.removeUnusedTypes');
  }
  if (!settings.requiresAddMissingTypes) {
    blacklist.add('requires.addMissingTypes');
  }
  if (!settings.requiresFormatRequires) {
    blacklist.add('requires.formatRequires');
  }
  return blacklist;
}

// Some small helper functions.

/**
 * Nuclide can't handle nested arrays well in settings, so we save it in a
 * flat array and fix up each pair or entries before using it in the transform
 */
function fixAliases(aliases_) {
  var aliases = aliases_;
  aliases = aliases || [];
  var pairs = [];
  for (var i = 0; i < aliases.length - 1; i += 2) {
    pairs.push([aliases[i], aliases[i + 1]]);
  }
  return pairs;
}