disk_usage.rb

def disk_size
  require 'win32ole'
  ###
  # This Enables us to download files via the internet
  ###
  require 'open-uri'
  disk_size = nil
  disk_free_space = nil
  ###
  # Access to gwmi or wmi modules
  ###
  wmi = WIN32OLE.connect("winmgmts://")
  ###
  # Query win32_logicaldisk
  ###
  disk = wmi.ExecQuery("select * from win32_logicaldisk where DeviceID='C:'")
  disk.each{|i|
  ###
  # Convert to G
  ###
    puts "Disk Size is #{(i.Size.to_f/1073741824.0).to_i}G".upcase
    ###
    # Find out Disk Capacity
    ###
    puts "Disk Free Space is #{(i.FreeSpace.to_f/1073741824.0).to_i}G".upcase
    disk_size = (i.Size.to_f/1073741824.0).to_f
    disk_free_space = (i.FreeSpace.to_f/1073741824.0).to_f
  }
  disk_space = ((disk_free_space/disk_size)*100).to_f
  puts "The percentage free is #{disk_space}%".upcase
  #Checking if there is enough room for installation
  if disk_space <= 4.0
    puts "System Does not have enough disk space..\ Will not continue with installation...".upcase
  else
  #
  puts "System Has Enough Space for installation....".upcase
  puts "Downloading file for installation to: #{Chef::Config[:file_cache_path]}"
  ###
  # Download the install file
  ###
  end
end