Reboot - Should detect Configuration Manager CCM_ClientUtilities status as pending reboot condition

If the SCCM client has set a RebootPending status, then this should be considered a valid pending reboot condition for Puppet. Practically speaking, it seems unlikely to have an SCCM client and Puppet running on the same node, but stranger things have happened.

The check, done through WMI - is nearly identical to the one performed as part of MODULES-2658:

require 'win32ole'

root = 'winmgmts:\\\\.\\root\\ccm\\ClientSDK'

dsc = WIN32OLE.connect(root)

lcm = dsc.Get('CCM_ClientUtilities')

ccm = lcm.ExecMethod_('DetermineIfRebootPending')

reboot = ccm.ReturnValue == 0 && (ccm.IsHardRebootPending || ccm.RebootPending)

puts reboot

Obviously more error-handling is required to ensure appropriate tooling is installed.

More details are available at:
http://blogs.technet.com/b/configmgrdogs/archive/2014/09/05/wmi-powershell-and-the-configuration-manager-client.aspx