json.shell.sh

json () {
	usage () {
		echo "Usage: json [property] [file]"
		echo "   property: (optional) The property of the JSON object to retrieve."
		echo "   file: (optional) The file containing the JSON object. Defaults to 'package.json'."
		echo ""
		echo "Special values for property:"
		echo "   *: Retrieve the whole object."
		echo "   --help or -h: Display this help message."
	}
	if ! command -v node &> /dev/null
	then
		echo "Node.js is not installed. Please install NVM and then a version of Node.js."
		echo "To install NVM, run: curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash"
		echo "After installing NVM, you can install Node.js by running: nvm install node"
		return 1
	fi
	case "$1" in
		("") local propertySuffix=".scripts"  ;;
		("*") local propertySuffix=""  ;;
		("--help" | "-h") usage
			return 0 ;;
		(*) local propertySuffix=".$1"  ;;
	esac
	local file=${2:-package.json}
	if [ ! -f $file ]
	then
		echo -e "\x1b[1mError: File '${file}' does not exist. If you intend to use 'package.json', ensure it's present in the current directory, or specify a different file.\x1b[0m"
		usage
		return 1
	fi
	node -e "console.log(JSON.parse(require('fs').readFileSync('${file}'))${propertySuffix})"
}