Bash: Add to PATH

gistfile1.sh

# addToPATH funciton for adding a directory to PATH.
# Prevents duplicate entries and ensures directory exists.
# $1 = Directory to add to PATH
addToPATH(){
	if [ -d "${1}" ]; then
		case ":${PATH}:" in
			*":${1}:"*);;            #Directory already in PATH
			*) PATH="${PATH}:${1}";; #Append directory to PATH
		esac
	fi
}