script to create an overlayfs without a node_modules directory

node-overlay.sh

#!/bin/bash

set -e
set -x

sourcedir=`readlink -f $1`
parentdir="$sourcedir/.."
base="$(basename $sourcedir)"

cd "$parentdir"

for dir in ./$base-{overlay,upper,work}; do
	if [ ! -d "$dir" ]; then
		mkdir -p "$dir"
	fi
done

if [ ! -d "$HOME/node_modules_whiteout" ]; then
	mkdir -p "$HOME/node_modules_whiteout"
	pushd $_
	sudo mknod node_modules c 0 0
	sudo setfattr -n 'trusted.overlay.opaque' -v 'y' node_modules
	popd
	sync
fi

sudo mount -t overlay overlay -o "lowerdir=$HOME/node_modules_whiteout:./$base,upperdir=./$base-upper,workdir=./$base-work" ./$base-overlay