in lib/omnibus/packagers/rpm.rb [266:277]
def compression_level(val = NULL)
if null?(val)
@compression_level || 9
else
unless val.is_a?(Integer) && 1 <= val && 9 >= val
raise InvalidValue.new(:compression_level, "be an Integer (between 1 and 9)")
end
@compression_level = val
end
end