Mount things inside of other things

mount.rb

require 'tmpdir'

class Mount
  def self.mount(path)
    @mntdir = Dir.mktmpdir
    fail 'Mounting boot partition failed!' unless system('sudo',
                                                         'mount',
                                                         path,
                                                         @mntdir)
    puts "Mounted #{path} on #{@mntdir}"
    yield @mntdir
    ensure
      puts "Unmounting #{path}"
      system('sudo',
             'umount',
             @mntdir)
  end
end