From fd580eab977e4c528427a1bbd54b2fd3d3a1ad77 Mon Sep 17 00:00:00 2001
From: Stuart Young <syoung@edx.org>
Date: Mon, 17 Sep 2018 14:15:02 -0400
Subject: [PATCH] load cached npm cache on jenkins workers

---
 scripts/jenkins-common.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/scripts/jenkins-common.sh b/scripts/jenkins-common.sh
index 4b4c23b3f5..cf91207221 100644
--- a/scripts/jenkins-common.sh
+++ b/scripts/jenkins-common.sh
@@ -26,6 +26,16 @@ if [ -e $HOME/edx-venv_clean.tar.gz ]; then
     tar -C $HOME -xf $HOME/edx-venv_clean.tar.gz
 fi
 
+# Load the npm packages from the time the worker was built
+# into the npm cache. This is an attempt to reduce the number
+# of times that npm gets stuck during an installation, by
+# reducing the number of packages that npm needs to fetch.
+if [ -e $HOME/edx-npm-cache_clean.tar.gz ]; then
+    echo "Loading archived npm packages into the local npm cache"
+    rm -rf $HOME/.npm
+    tar -C $HOME -xf $HOME/edx-npm-cache_clean.tar.gz
+fi
+
 # Activate the Python virtualenv
 source $HOME/edx-venv/bin/activate