def cleanup
dest_files = Set.new
Dir.glob(File.join(self.dest, "**", "*"), File::FNM_DOTMATCH) do |file|
dest_files << file unless file =~ /\/\.{1,2}$/
end
files = Set.new
self.posts.each do |post|
files << post.destination(self.dest)
end
self.pages.each do |page|
files << page.destination(self.dest)
end
self.static_files.each do |sf|
files << sf.destination(self.dest)
end
dirs = Set.new
files.each { |file| dirs << File.dirname(file) }
files.merge(dirs)
obsolete_files = dest_files - files
FileUtils.rm_rf(obsolete_files.to_a)
end