Update Node

update_node.sh

#!/bin/bash
set -e

VERSION=$(curl -Ss https://nodejs.org/download/release/index.json | jq -r '.[0].version')

INSTALL_DIR="/usr/local/node"
if [[ ! -d ${INSTALL_DIR} ]]; then
    echo "Install directory '${INSTALL_DIR}' does not exist, sudo required to create it..."
    sudo mkdir -p ${INSTALL_DIR}
fi
OWNED_BY=$(ls -ld ${INSTALL_DIR} | awk 'NR==1 {print $3}')
if [[ ${OWNED_BY} != $(whoami) ]]; then
    echo "Install directory not writable by current user, sudo required to change that..."
    sudo chown $(id -un):$(id -gn) ${INSTALL_DIR}
fi

VERSION_DIR="${INSTALL_DIR}/${VERSION}"
if [[ -d ${VERSION_DIR} ]]; then
    >&2 echo "${VERSION_DIR} already exists, don't know what to do with it."
    exit 1
fi

DL_URL="https://nodejs.org/dist/${VERSION}/node-${VERSION}-linux-x64.tar.xz"

cd /tmp
rm -f node-${VERSION}-linux-x64.tar.xz
curl -Ss ${DL_URL} > node-${VERSION}-linux-x64.tar.xz
tar -xf node-${VERSION}-linux-x64.tar.xz
rm node-${VERSION}-linux-x64.tar.xz

mv node-${VERSION}-linux-x64 ${VERSION_DIR}
rm -f ${INSTALL_DIR}/current
ln -s ${VERSION_DIR} ${INSTALL_DIR}/current

if [[ :$PATH: == *:"${INSTALL_DIR}/current/bin":* ]]; then
    echo "nodejs updated to: $(node --version)"
else
    echo "node ${VERSION} installed but is missing from your \$PATH"
    echo "Add the following line to your \$PATH variable:"
    echo "    ${INSTALL_DIR}/current/bin"
fi