Restart fastkit with Hammerspoon when DNS changes

init.lua

local network = hs.network.configuration.open()
local fastkitPath = '~/.rbenv/shims/fastkit'
local home = '/Users/andrew'

function fastkitCompleted(exitCode, stdOut, stdErr)
    if exitCode ~= 0 then
        hs.alert.show("Fastkit failed to reload")
        log.d(stdOut)
    end
end

function fastkitCallback(store, keys)
    job = hs.task.new(fastkitPath, fastkitCompleted, {'restart', 'proxy'})
    job:setEnvironment({PATH='$PATH:/bin:/usr/bin:/usr/local/bin:/sbin', HOME=home})
    job:setWorkingDirectory('~/src/fastkit')
    job:start()
end

network:monitorKeys('State:/Network/Global/DNS')
network:setCallback(fastkitCallback)
network:start()