update all outdated npm packages to latest version

npm-update-to-latest.sh

#!/bin/bash

# get output
output=`npm outdated --long`

# get name and type (regular or dev dependency) of all packages
counter=0
for token in $output
do
	if [ $((counter > 6)) == 1 ] # skip first 7 tokens
	then
		# add package name to packages array
		if [ $(((counter - 1) % 6)) == 0 ]
		then
			packages+=($token)
		fi

		# add dependency type to types array
		if [ $((counter % 6)) == 0 ]
		then
			types+=($token)
		fi
	fi

	# increment counter
	((counter++))
done

# make sure that both arrays have the same length
if [ ${#packages[@]} != ${#types[@]} ]
then
	echo "error: package and types array length differs"
	exit 1
fi

# run `npm install <package>@latest --save(-dev)` for each package
for i in "${!packages[@]}"
do
	if [[ ${types[$i]} == dev* ]]
	then
		npm install ${packages[$i]}@latest --save-dev
	else
		npm install ${packages[$i]}@latest --save
	fi
done