zsh function to show local ip address (~/.zshrc)

gistfile1.txt

ip() {
  local ifc addr
  ifc=$(route -n get default 2>/dev/null | awk '/interface:/{print $2}')
  if [[ -n "$ifc" ]]; then
    addr=$(ipconfig getifaddr "$ifc" 2>/dev/null)
    if [[ "$addr" =~ ^(10\.|192\.168\.|172\.(1[6-9]|2[0-9]|3[01])\.) ]]; then
      echo "$addr"
      return
    fi
  fi
  for ifc in en0 en1 en2 en3; do
    addr=$(ipconfig getifaddr "$ifc" 2>/dev/null)
    if [[ "$addr" =~ ^(10\.|192\.168\.|172\.(1[6-9]|2[0-9]|3[01])\.) ]]; then
      echo "$addr"
      return
    fi
  done
  echo "no LAN IPv4" >&2
  return 1
}