Prints the current SSID name and the local and public IP addresses

ip.sh

#!/usr/bin/env bash
#
# ip
#
# Shows the local and public IP addresses

set -Eeuo pipefail

# Print out error messages to STDERR.
function err() {
  echo -e "\033[0;31mERROR: $@\033[0m" >&2;
}

function check_connection() {
    if ! nc -z www.google.com 80 -G1 1> /dev/null 2>&1; then
        err "No internet connection"; exit 2;
    fi;
}

#-- Main
function main() {
    check_connection
    
    ssid=$(networksetup -getairportnetwork en0)
    local=$(ipconfig getifaddr en0)
    public=$(dig -4 TXT +short o-o.myaddr.l.google.com @ns1.google.com)

    echo "${ssid}"
    echo "----------------------"
    # The IP addresses are wrapped in quotes. This removes them.
    echo "Local:  ${local//\"/}"
    echo "Public: ${public//\"/}"
}

main "$@"