ENV=$1

RED='\[\033[1;31m\]'
YELLOW='\[\033[1;33m\]'
NC='\[\033[0m\]' # No Color

 if [[ "$OLD_PS1" == "" ]]; then
    OLD_PS1="$PS1"
fi

 # Unset AWS_* variables previously set from aws-vault. Do this via some janky bash to ensure it works.
while read -r line; do unset $line; done < <(env | grep AWS_ | while read old_env_value; do
    # take each AWS var and unset them, ex: 'AWS_REGION=us-east-1' turns into 'unset AWS_REGION'
    env_var="$(echo $old_env_value | awk -F'=' '{print $1}')";
    echo $env_var;
done);
 if [[ "${ENV}" != "clear-env" ]]; then
    # Re-assign AWS_* variables from aws-vault.  Do this via some janky bash to ensure it works.
    while read -r line; do declare -x "$line"; done < <(aws-vault exec ${ENV} -- env | grep AWS_)
    # Export $PS1 so we know what we are doing.
    if [[ "${ENV}" == "production" ]]; then
        export PS1="[${RED}$ENV}${NC}] $OLD_PS1";
    else
        export PS1="[${YELLOW}${ENV}${NC}] $OLD_PS1";
    fi
else
    if [[ "$OLD_PS1" != "" ]]; then
        export PS1="$OLD_PS1";
    fi
Fi