lib/functions.in: first attempt to handle the different ways for ruby packages

lib/functions.in

@@ -932,6 +932,16 @@ build_this_package() {
 				pyconfopt="${pyconfopt:=--prefix $root/$prefix}"
 				hook_eval premake
 				eval ${pyscript:-python} setup.py build install $pyconfopt
+				hook_eval postmake
+			elif [ -f install.rb ] ; then
+				hook_eval premake
+				${rubyscript:-ruby} install.rb
+
+				hook_eval postmake
+			elif [ -f Rakefile ] ; then
+				hook_eval premake
+				eval rake package
+
 				hook_eval postmake
 			else # styles that include a make run
 				if [ ! -f Makefile -a ! -f makefile -a \