## .update_network ##
#!/bin/env bash
#
## Connect to network and update hostname

# Connect
connect-to-network
sleep 2s

IP="$(ip a show scope global \
  | grep inet \
  | head -1 \
  | sed -r 's#.*inet ([0-9]+.[0-9]+.[0-9]+.[0-9]+.)/.*#\1#')"
HOSTNAME="$(dig +noall +answer +short -x "$IP" \
  | grep -v ';' \
  | head -1 \
  | sed 's/\.$//')"

# Set hostname
if [[ "${HOSTNAME:+x}" ]]; then
  sudo hostnamectl set-hostname "${HOSTNAME}"
fi