sh script to create a nodejs application executable using pkg https://www.npmjs.com/package/pkg and automatically including .node files and zip with all application files

package.sh

#!/bin/bash

ask() {
	# http://djm.me/ask
	while true; do

		if [ "${2:-}" = "Y" ]; then
			prompt="Y/n"
			default=Y
		elif [ "${2:-}" = "N" ]; then
			prompt="y/N"
			default=N
		else
			prompt="y/n"
			default=
		fi

		# Ask the question
		read -p "$1 [$prompt] " REPLY

		# Default?
		if [ -z "$REPLY" ]; then
			REPLY=$default
		fi

		# Check if the reply is valid
		case "$REPLY" in
			Y*|y*) return 0 ;;
			N*|n*) return 1 ;;
		esac

	done
}

read -p "Application name: " APP
read -p "Version: " VERSION
read -p "Folder: " PKG_FOLDER

# Check pkg folder exist
if [ ! -d "$PKG_FOLDER" ]; then
  echo "## $PKG_FOLDER must exist, create the folder before run this script"
  exit 1
fi

echo "## Clear $PKG_FOLDER folder"
rm -rf $PKG_FOLDER/*

if ask "Build application ?"; then
  echo "## Building application"
  npm run build
fi

echo "## Creating application package in $PKG_FOLDER folder"
sudo pkg package.json -t node8-linux-x64 --out-path $PKG_FOLDER

echo "## Check for .node files to include in executable folder"
declare TO_INCLUDE=($(find ./node_modules/ -type f -name "*.node"))

TOTAL_INCLUDE=${#TO_INCLUDE[@]}

echo "## Found $TOTAL_INCLUDE files to include"

i=0

while [ "$i" -lt "$TOTAL_INCLUDE" ]
do
  IFS='/' path=(${TO_INCLUDE[$i]})
  file=${path[-1]}
  echo "## Copying $file to $PKG_FOLDER folder"
  cp "${TO_INCLUDE[$i]}" "./$PKG_FOLDER"
  let "i = $i + 1"
done


cd $PKG_FOLDER
echo "## Create zip file $APP-v$VERSION"
zip $APP-v$VERSION *