muffinresearch

hdiutil attach /Applications/Install\ OS\ X\ Mavericks.app/Contents/SharedSupport/InstallESD.dmg
cd /tmp
hdiutil convert /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg -format UDRW -o /tmp/RWBase
hdiutil convert -format UDSP -o /tmp/sparseRWBase RWBase.dmg
rm /tmp/RWBase.dmg
hdiutil resize -size 6g /tmp/sparseRWBase.sparseimage
hdiutil attach -owners on /tmp/sparseRWBase.sparseimage -shadow
sudo rm /Volumes/OS\ X\ Base\ System/System/Installation/Packages
sudo ditto /Volumes/OS\ X\ Install\ ESD/Packages /Volumes/OS\ X\ Base\ System/System/Installation/Packages
hdiutil eject /Volumes/OS\ X\ Install\ ESD/

tansengming

# How Clearance / Hoptoad does it
module Clearance
  class << self
    attr_accessor :configuration
  end

  def self.configure
    self.configuration ||= Configuration.new
    yield(configuration)
  end