"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _os = _interopRequireDefault(require("os"));
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var _cacache = _interopRequireDefault(require("cacache"));
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var _findCacheDir = _interopRequireDefault(require("find-cache-dir"));
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var _workerFarm = _interopRequireDefault(require("worker-farm"));
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var _serializeJavascript = _interopRequireDefault(require("serialize-javascript"));
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var _isWsl = _interopRequireDefault(require("is-wsl"));
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var _minify = _interopRequireDefault(require("./minify"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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const worker = require.resolve('./worker');
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class TaskRunner {
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constructor(options = {}) {
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const {
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cache,
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parallel
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} = options;
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this.cacheDir = cache === true ? (0, _findCacheDir.default)({
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name: 'terser-webpack-plugin'
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}) || _os.default.tmpdir() : cache; // In some cases cpus() returns undefined
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// https://github.com/nodejs/node/issues/19022
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const cpus = _os.default.cpus() || {
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length: 1
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}; // WSL sometimes freezes, error seems to be on the WSL side
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// https://github.com/webpack-contrib/terser-webpack-plugin/issues/21
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this.maxConcurrentWorkers = _isWsl.default ? 1 : parallel === true ? cpus.length - 1 : Math.min(Number(parallel) || 0, cpus.length - 1);
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}
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run(tasks, callback) {
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/* istanbul ignore if */
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if (!tasks.length) {
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callback(null, []);
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return;
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}
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if (this.maxConcurrentWorkers > 1) {
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const workerOptions = process.platform === 'win32' ? {
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maxConcurrentWorkers: this.maxConcurrentWorkers,
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maxConcurrentCallsPerWorker: 1
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} : {
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maxConcurrentWorkers: this.maxConcurrentWorkers
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};
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this.workers = (0, _workerFarm.default)(workerOptions, worker);
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this.boundWorkers = (options, cb) => {
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try {
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this.workers((0, _serializeJavascript.default)(options), cb);
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} catch (error) {
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// worker-farm can fail with ENOMEM or something else
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cb(error);
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}
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};
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} else {
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this.boundWorkers = (options, cb) => {
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try {
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cb(null, (0, _minify.default)(options));
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} catch (error) {
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cb(error);
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}
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};
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}
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let toRun = tasks.length;
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const results = [];
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const step = (index, data) => {
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toRun -= 1;
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results[index] = data;
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if (!toRun) {
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callback(null, results);
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}
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};
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tasks.forEach((task, index) => {
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const enqueue = () => {
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this.boundWorkers(task, (error, data) => {
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const result = error ? {
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error
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} : data;
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const done = () => step(index, result);
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if (this.cacheDir && !result.error) {
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_cacache.default.put(this.cacheDir, (0, _serializeJavascript.default)(task.cacheKeys), JSON.stringify(data)).then(done, done);
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} else {
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done();
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}
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});
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};
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if (this.cacheDir) {
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_cacache.default.get(this.cacheDir, (0, _serializeJavascript.default)(task.cacheKeys)).then(({
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data
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}) => step(index, JSON.parse(data)), enqueue);
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} else {
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enqueue();
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}
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});
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}
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exit() {
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if (this.workers) {
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_workerFarm.default.end(this.workers);
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}
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}
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}
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exports.default = TaskRunner;
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