From 7619736cb3b319ee5a4ac6c510e4722961faa25a Mon Sep 17 00:00:00 2001
From: Evilebot Tnawi <evilebottnawi@users.noreply.github.com>
Date: Tue, 14 May 2019 22:50:57 +0300
Subject: [PATCH] fix: disable parallel on WSL (#403)

---
 package.json      |  1 +
 src/TaskRunner.js | 10 ++++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/package.json b/package.json
index b8832d40..82c9dae3 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
   "dependencies": {
     "cacache": "^11.3.2",
     "find-cache-dir": "^2.1.0",
+    "is-wsl": "^1.1.0",
     "schema-utils": "^1.0.0",
     "serialize-javascript": "^1.7.0",
     "source-map": "^0.6.1",
diff --git a/src/TaskRunner.js b/src/TaskRunner.js
index 4e60a13a..861f0645 100644
--- a/src/TaskRunner.js
+++ b/src/TaskRunner.js
@@ -4,6 +4,7 @@ import cacache from 'cacache';
 import findCacheDir from 'find-cache-dir';
 import workerFarm from 'worker-farm';
 import serialize from 'serialize-javascript';
+import isWsl from 'is-wsl';
 
 import minify from './minify';
 
@@ -19,10 +20,11 @@ export default class TaskRunner {
     // In some cases cpus() returns undefined
     // https://github.com/nodejs/node/issues/19022
     const cpus = os.cpus() || { length: 1 };
-    this.maxConcurrentWorkers =
-      parallel === true
-        ? cpus.length - 1
-        : Math.min(Number(parallel) || 0, cpus.length - 1);
+    this.maxConcurrentWorkers = isWsl
+      ? 1
+      : parallel === true
+      ? cpus.length - 1
+      : Math.min(Number(parallel) || 0, cpus.length - 1);
   }
 
   run(tasks, callback) {