puppet/aws: reading userdata powershell script, wrapping in <powershell> tags and setting environment variables

readuserdatascript.py

 def _read_script(self, script_name, site_name, type):
        
        script = ""
        script += "<powershell>\n\n"
        
        # set environment variable 
        script += "  [Environment]::SetEnvironmentVariable(\"ENVNAME\", \"" + site_name + "\", \"Machine\")\n"
        script += "  [Environment]::SetEnvironmentVariable(\"NTPSERVER\", \"ntp." + site_name + "\", \"Machine\")\n"
        script += "  [Environment]::SetEnvironmentVariable(\"PREPDIR\", \"C:\\AmazonEnvPrep-v2012\", \"Machine\")\n"
        
        script += "  [Environment]::SetEnvironmentVariable(\"FACTER_fqdn\", \"dummy.ammado.com\", \"Machine\")\n"
        script += "  [Environment]::SetEnvironmentVariable(\"FACTER_envtype\", \"" + type + "\", \"Machine\")\n"
        
        try:
            f = open(script_name, 'r')
            data = f.read()
            f.close()
        except IOError, e:
            self.logger.info('Error opening file: %s' % (e))
        
        script += data    
        script += "\n</powershell>"
        
        # f = open("C:\\test.log", 'w')
        # f.write(script)
        # f.close()
        
        return script

configuring two facters for puppet:
FACTER_fqdn,
FACTER_envtype