Vagrant triggers for updating host hosts

Vagrantfile

Vagrant.configure('2') do |config|
  ENV['HOST'] ||= '_ sys._'

  config.vm.box      = 'debian/contrib-buster64'
  config.vm.hostname = File.basename(Dir.pwd) + '.test'
  config.vm.network 'private_network', type: 'dhcp'

  config.trigger.after :reload, :resume, :up do |trig|
    trig.info = 'Updating sytstem hosts...'
    trig.ruby do |env, vm|
      hostname   = `vagrant ssh #{vm.name} -c 'hostname -f' -- -q`.chomp
      ip_address = `vagrant ssh #{vm.name} -c 'hostname -I | cut -d " " -f 2' -- -q`.chomp

      system("echo '#{ip_address} #{ENV['HOST'].gsub('_', hostname)} # vagrant-#{vm.id}' | sudo tee -a /etc/hosts >/dev/null") unless Vagrant::Util::Platform.windows?
      if Vagrant::Util::Platform.windows?
        require 'win32ole'
        hFile = File.expand_path('system32/drivers/etc/hosts', ENV['windir'])
        shell = WIN32OLE.new('Shell.Application')
        shell.ShellExecute("echo #{ip_address} #{ENV['HOST'].gsub('_', hostname)} # vagrant-#{vm.id}>> #{hFile}", nil, nil, 'runas')
      end
    end
  end

  config.trigger.before :destroy, :reload do |trig|
    delete_hosts(trig)
  end

  config.trigger.after :halt, :suspend do |trig|
    delete_hosts(trig)
  end
end

def delete_hosts(trig)
  trig.info = 'Updating system hosts...'
  trig.ruby do |env, vm|
    system("sudo sed -i '' '/ # vagrant-#{vm.id}$/d' /etc/hosts") unless Vagrant::Util::Platform.windows?
    if Vagrant::Util::Platform.windows?
      require 'win32ole'
      hFile = File.expand_path('system32/drivers/etc/hosts', ENV['windir'])
      shell = WIN32OLE.new('Shell.Application')
      shell.ShellExecute("findstr /v /c:\" # vagrant-#{vm.id}$\" #{hFile} >> #{hFile}", nil, nil, 'runas')
    end
  end
end