require 'to_lvm_xfs/exts'

class Image
	attr_reader :base, :dir, :image, :root
	def initialize base, dir, image: nil, root: nil
		@base = base
		@dir =
			case dir
			when Pathname then dir
			when String then Pathname.new dir
			else raise ArgumentError, "Pathname for dir expected"
			end
		@image =
			case image
			when Pathname then image
			when String then Pathname.new image
			when nil then @dir+'image'
			else raise ArgumentError, "Pathname for image expected"
			end
		@image = @image.readlink.expand_path @image.expand_path.dirname  while @image.symlink?
		@root =
			case root
			when Pathname then root
			when String then Pathname.new root
			when nil then @dir+'root'
			else raise ArgumentError, "Path for root must be Pathname, String or MP, if given"
			end
	end
	def to_s() @dir.to_s end

	def kpartx() @base.kpartx @image end
	def departx() @base.departx @image end
	def lpartx() @base.lpartx @image end
	def kpartxed?() @base.kpartxed? @image end
end

class MP
	attr_reader :base, :dev, :mp, :opts
	def initialize base, dev, mp, *opts
		@base, @dev, @mp, opts = base, dev, mp, opts
	end

	def mount() @base.mount dev, mp, *opts end
	def umount() @base.umount mp end
	def uuid() @uuid ||= @base.sh.fs_uuid @dev end
	def fstype() @fstype ||= @base.sh.fs_type @dev end
	def clear_cache() @uuid = @fstype = nil end
end