Prevent executing "npm install <deps>" without `-S`, `-D`, `--save`, `--save-dev`, `-g` flags

npm-wrapper.sh

#!/bin/bash

set -e

if ([ "$1" == "install" ] || [ "$1" == "i" ]) && [ "$#" -ne 1 ]; then
        for var in "$@"
        do
                if [ "$var" == "--save" ] || [ "$var" == "--save-dev" ] || [ "$var" == "-S" ] || [ "$var" == "-D" ] || [ "$var" == "-g" ]; then
                        has_modifier=true
                fi
        done

        if [ "$has_modifier" != true ]; then
                echo "npm install without --save or --save-dev"
                exit 1
        fi
fi

npm $@