58b038cea3c9794b7e2dd0fcba78dcf63893fb060bcef98edefebcb8dc7e179e8538e2f8cd554b7e8b73c0193565b1c9135012880dc32b66a3f867af9abbfc 3.3 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.default = void 0;
  6. var _os = _interopRequireDefault(require("os"));
  7. var _cacache = _interopRequireDefault(require("cacache"));
  8. var _findCacheDir = _interopRequireDefault(require("find-cache-dir"));
  9. var _workerFarm = _interopRequireDefault(require("worker-farm"));
  10. var _serializeJavascript = _interopRequireDefault(require("serialize-javascript"));
  11. var _isWsl = _interopRequireDefault(require("is-wsl"));
  12. var _minify = _interopRequireDefault(require("./minify"));
  13. function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
  14. const worker = require.resolve('./worker');
  15. class TaskRunner {
  16. constructor(options = {}) {
  17. const {
  18. cache,
  19. parallel
  20. } = options;
  21. this.cacheDir = cache === true ? (0, _findCacheDir.default)({
  22. name: 'terser-webpack-plugin'
  23. }) || _os.default.tmpdir() : cache;
  24. // In some cases cpus() returns undefined
  25. // https://github.com/nodejs/node/issues/19022
  26. const cpus = _os.default.cpus() || {
  27. length: 1
  28. };
  29. // WSL sometimes freezes, error seems to be on the WSL side
  30. // https://github.com/webpack-contrib/terser-webpack-plugin/issues/21
  31. this.maxConcurrentWorkers = _isWsl.default ? 1 : parallel === true ? cpus.length - 1 : Math.min(Number(parallel) || 0, cpus.length - 1);
  32. }
  33. run(tasks, callback) {
  34. /* istanbul ignore if */
  35. if (!tasks.length) {
  36. callback(null, []);
  37. return;
  38. }
  39. if (this.maxConcurrentWorkers > 1) {
  40. const workerOptions = process.platform === 'win32' ? {
  41. maxConcurrentWorkers: this.maxConcurrentWorkers,
  42. maxConcurrentCallsPerWorker: 1
  43. } : {
  44. maxConcurrentWorkers: this.maxConcurrentWorkers
  45. };
  46. this.workers = (0, _workerFarm.default)(workerOptions, worker);
  47. this.boundWorkers = (options, cb) => {
  48. try {
  49. this.workers((0, _serializeJavascript.default)(options), cb);
  50. } catch (error) {
  51. // worker-farm can fail with ENOMEM or something else
  52. cb(error);
  53. }
  54. };
  55. } else {
  56. this.boundWorkers = (options, cb) => {
  57. try {
  58. cb(null, (0, _minify.default)(options));
  59. } catch (error) {
  60. cb(error);
  61. }
  62. };
  63. }
  64. let toRun = tasks.length;
  65. const results = [];
  66. const step = (index, data) => {
  67. toRun -= 1;
  68. results[index] = data;
  69. if (!toRun) {
  70. callback(null, results);
  71. }
  72. };
  73. tasks.forEach((task, index) => {
  74. const enqueue = () => {
  75. this.boundWorkers(task, (error, data) => {
  76. const result = error ? {
  77. error
  78. } : data;
  79. const done = () => step(index, result);
  80. if (this.cacheDir && !result.error) {
  81. _cacache.default.put(this.cacheDir, (0, _serializeJavascript.default)(task.cacheKeys), JSON.stringify(data)).then(done, done);
  82. } else {
  83. done();
  84. }
  85. });
  86. };
  87. if (this.cacheDir) {
  88. _cacache.default.get(this.cacheDir, (0, _serializeJavascript.default)(task.cacheKeys)).then(({
  89. data
  90. }) => step(index, JSON.parse(data)), enqueue);
  91. } else {
  92. enqueue();
  93. }
  94. });
  95. }
  96. exit() {
  97. if (this.workers) {
  98. _workerFarm.default.end(this.workers);
  99. }
  100. }
  101. }
  102. exports.default = TaskRunner;