From efc0d0d34932fb049befbc65b9bf9e76d43c5b25 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 7 May 2020 04:19:20 -0400
Subject: [PATCH] Skip install script if already installed (#91)

The install script sometimes throws error on subsequent `yarn` installs since `yarn`
seems to invoke install scripts when it is shuffling things around. It also causes
issue for CI where the `node_modules` directory is cached across builds.
---
 npm/esbuild/install.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/npm/esbuild/install.js b/npm/esbuild/install.js
index 5ac9cae3be1..af4513596ef 100644
--- a/npm/esbuild/install.js
+++ b/npm/esbuild/install.js
@@ -17,6 +17,10 @@ function installPackage(package) {
       env[key] = process.env[key];
     }
   }
+  
+  if (fs.existsSync(installDir)) {
+    return;
+  }
 
   // Run "npm install" recursively to install this specific package
   fs.mkdirSync(installDir);