Checking node/npm versions based on package.json

check_node_npm.sh

#!/bin/sh

set -e

# Needs node, npm, semver (npm -g i semver) and jq utility to be installed.

# First check if we have needed utils.
which node
which npm
which jq
which semver
# Check if required engine versions are met on this system.
echo "Node version check:" && semver -r `jq -r ".engines.node" package.json` `node -v`
echo "Npm version check:" && semver -r `jq -r ".engines.npm" package.json` `npm -v`