# Monkeypatch the create() method, to add sparse volumes support
class ZFS

	# Create filesystem
	def create(opts={})
		return nil if exist?

		cmd = [ZFS.zfs_path].flatten + ['create']
		cmd << '-p' if opts[:parents]
		cmd << '-s' if opts[:volume] and opts[:sparse]
		cmd += opts[:zfsopts].map{|el| ['-o', el]}.flatten if opts[:zfsopts]
		cmd += ['-V', opts[:volume]] if opts[:volume]
		cmd << name

		out, status = Open3.capture2e(*cmd)
		if status.success? and out.empty?
			return self
		elsif out.match(/dataset already exists\n$/)
			nil
		else
			raise Exception, "something went wrong: #{out}, #{status}"
		end
	end

end