#!/bin/bash -e

ENV=$1

if [ -z "$ENV" ]; then
        echo usage: $0 /etc/environment
        exit 1
fi

touch $ENV
if [ $? -ne 0 ]; then
        echo exiting, unable to modify: $ENV
        exit 1
fi

sed -i -e '/^COREOS_PUBLIC_IPV4=/d;/^COREOS_PRIVATE_IPV4=/d' $ENV

COREOS_PUBLIC_IPV4=$(ip -4 -o addr show dev eth0 | awk '{ print $4; }' | cut -d / -f1)
COREOS_PRIVATE_IPV4=$(ip -4 -o addr show dev ens4v1 | awk '{ print $4; }' | cut -d / -f1)
echo COREOS_PUBLIC_IPV4=$COREOS_PUBLIC_IPV4 >> $ENV
echo COREOS_PRIVATE_IPV4=$COREOS_PRIVATE_IPV4 >> $ENV