Runner.js
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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _createClass = 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); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _os = require('os');
var _os2 = _interopRequireDefault(_os);
var _cacache = require('cacache');
var _cacache2 = _interopRequireDefault(_cacache);
var _findCacheDir = require('find-cache-dir');
var _findCacheDir2 = _interopRequireDefault(_findCacheDir);
var _workerFarm = require('worker-farm');
var _workerFarm2 = _interopRequireDefault(_workerFarm);
var _serializeJavascript = require('serialize-javascript');
var _serializeJavascript2 = _interopRequireDefault(_serializeJavascript);
var _minify = require('./minify');
var _minify2 = _interopRequireDefault(_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"); } }
var workerFile = require.resolve('./worker');
try {
// run test
workerFile = require.resolve('../../dist/uglify/worker');
} catch (e) {} // eslint-disable-line no-empty
var Runner = 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, _findCacheDir2.default)({ name: 'uglifyjs-webpack-plugin' }) : cache;
// In some cases cpus() returns undefined
// https://github.com/nodejs/node/issues/19022
var cpus = _os2.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, _workerFarm2.default)(workerOptions, workerFile);
this.boundWorkers = function (options, cb) {
return _this.workers((0, _serializeJavascript2.default)(options), cb);
};
} else {
this.boundWorkers = function (options, cb) {
try {
cb(null, (0, _minify2.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) {
_cacache2.default.put(_this.cacheDir, (0, _serializeJavascript2.default)(task.cacheKeys), JSON.stringify(data)).then(done, done);
} else {
done();
}
});
};
if (_this.cacheDir) {
_cacache2.default.get(_this.cacheDir, (0, _serializeJavascript2.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) {
_workerFarm2.default.end(this.workers);
}
}
}]);
return Runner;
}();
exports.default = Runner;