snippet.sh

#!/usr/bin/env ruby

require 'pp'

script_dir = File.expand_path(File.dirname(__FILE__))
$network_location_file_path = "#{script_dir}/network-location.txt"

def l s
    puts s
end

def assigned_network_location
  # example output: * 6064213B-532D-43C9-8941-DC72B6487955	(Work)
  output = `scselect 2>&1 | grep ' \\* '`

  # parse out the location
  location = output.scan(/\(.*\)/).first.gsub(/[\(\)]/, "")
  location
end

def active_network_location
  location = 'home'
  `ifconfig | grep -i "inet 54."`
  if $? == 0 then
    location = 'work'
  end
  location
end

def network_location_from_file
  File.open($network_location_file_path, 'r').read.chomp
end

# look at ip address to determine active network
active = active_network_location

# get the system set network location in Network Preferences
assigned = assigned_network_location 

# switch the assigned network location if they don't match
if active != assigned then
  puts "setting network location to \"#{active}\""
  
  # save active location to a file for other scripts to use
  `echo #{active} > #{$network_location_file_path}`
  
  # update network preferences setting
  `scselect \"#{active}\"`
else
    l "no network location changes"
end