Vagrant provision—Node installation snippet

provision.sh

#!/bin/bash

NODE_VERSION=v4.2.3  # amend this line only, to change Node version

# Node.js
if ! command -v npm; then
    INSTALL_NODE=1
elif [ $NODE_VERSION != `node --version` ]; then
    rm -rf /opt/node-`node --version`-linux-x64/
    rm /usr/local/bin/node
    rm /usr/local/bin/npm
    INSTALL_NODE=1
else
    INSTALL_NODE=0
fi
if [ $INSTALL_NODE = 1 ]; then
    wget http://nodejs.org/dist/$NODE_VERSION/node-$NODE_VERSION-linux-x64.tar.gz
    cd /opt && tar -xzf /home/vagrant/node-$NODE_VERSION-linux-x64.tar.gz
    ln -s /opt/node-$NODE_VERSION-linux-x64/bin/node /usr/local/bin/node
    ln -s /opt/node-$NODE_VERSION-linux-x64/bin/npm /usr/local/bin/npm
    cd /home/vagrant
    rm node-$NODE_VERSION-linux-x64.tar.gz
fi