Swap node_modules folders when they're different between git branches

node-modules-swap.sh

#!/bin/bash

# Assumes you are not committing node_modules to git. You really shouldn't... 
#
# 1. Save bash script in some folder like $HOME/Scripts/
# 2. Add nswap alias to your .bash_profile:
#    alias nswap="bash $HOME/Scripts/node-modules-swap.sh"

e=$(ls | grep node_modules)

if [ $e == "node_modules" ]; then
	echo "Swapping node_modules..."
	mkdir ~/Scripts/nodeswap/old/
	cp -rf node_modules ~/Scripts/nodeswap/old
	rm -rf node_modules
	cp -rf ~/Scripts/nodeswap/new/node_modules ./
	rm -rf ~/Scripts/nodeswap/new
	mv ~/Scripts/nodeswap/old ~/Scripts/nodeswap/new
else
	echo "No node_modules folder found. Are you in the right directory?"
fi