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Viewing file:     Runner.js (4.33 KB)      -rw-r--r--

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _os = _interopRequireDefault(require("os"));

var _cacache = _interopRequireDefault(require("cacache"));

var _findCacheDir = _interopRequireDefault(require("find-cache-dir"));

var _workerFarm = _interopRequireDefault(require("worker-farm"));

var _serializeJavascript = _interopRequireDefault(require("serialize-javascript"));

var _minify = _interopRequireDefault(require("./minify"));

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

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var workerFile = require.resolve('./worker');

try {
  // run test
  workerFile = require.resolve('../../dist/uglify/worker');
} catch (e) {} // eslint-disable-line no-empty


var Runner = /*#__PURE__*/function () {
  function Runner() {
    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

    _classCallCheck(this, Runner);

    var cache = options.cache,
        parallel = options.parallel;
    this.cacheDir = cache === true ? (0, _findCacheDir.default)({
      name: 'uglifyjs-webpack-plugin'
    }) : cache; // In some cases cpus() returns undefined
    // https://github.com/nodejs/node/issues/19022

    var cpus = _os.default.cpus() || {
      length: 1
    };
    this.maxConcurrentWorkers = parallel === true ? cpus.length - 1 : Math.min(Number(parallel) || 0, cpus.length - 1);
  }

  _createClass(Runner, [{
    key: "runTasks",
    value: function runTasks(tasks, callback) {
      var _this = this;

      /* istanbul ignore if */
      if (!tasks.length) {
        callback(null, []);
        return;
      }

      if (this.maxConcurrentWorkers > 1) {
        var workerOptions = process.platform === 'win32' ? {
          maxConcurrentWorkers: this.maxConcurrentWorkers,
          maxConcurrentCallsPerWorker: 1
        } : {
          maxConcurrentWorkers: this.maxConcurrentWorkers
        };
        this.workers = (0, _workerFarm.default)(workerOptions, workerFile);

        this.boundWorkers = function (options, cb) {
          return _this.workers((0, _serializeJavascript.default)(options), cb);
        };
      } else {
        this.boundWorkers = function (options, cb) {
          try {
            cb(null, (0, _minify.default)(options));
          } catch (error) {
            cb(error);
          }
        };
      }

      var toRun = tasks.length;
      var results = [];

      var step = function step(index, data) {
        toRun -= 1;
        results[index] = data;

        if (!toRun) {
          callback(null, results);
        }
      };

      tasks.forEach(function (task, index) {
        var enqueue = function enqueue() {
          _this.boundWorkers(task, function (error, data) {
            var result = error ? {
              error
            } : data;

            var done = function done() {
              return step(index, result);
            };

            if (_this.cacheDir && !result.error) {
              _cacache.default.put(_this.cacheDir, (0, _serializeJavascript.default)(task.cacheKeys), JSON.stringify(data)).then(done, done);
            } else {
              done();
            }
          });
        };

        if (_this.cacheDir) {
          _cacache.default.get(_this.cacheDir, (0, _serializeJavascript.default)(task.cacheKeys)).then(function (_ref) {
            var data = _ref.data;
            return step(index, JSON.parse(data));
          }, enqueue);
        } else {
          enqueue();
        }
      });
    }
  }, {
    key: "exit",
    value: function exit() {
      if (this.workers) {
        _workerFarm.default.end(this.workers);
      }
    }
  }]);

  return Runner;
}();

exports.default = Runner;