Puppet class to turn parameters in to puppet resources

externalresources.rb

hostclass :externalresources do
    scope_h = scope.to_hash.reject { |k,v| !( k.is_a?(String) && v.is_a?(String) ) } 
    scope_h.keys.each do |var|

        if scope_h[var][0].chr == '{' 
            begin
                #Convert the variable from a string to a hash
                var_h = eval scope_h[var]
            rescue => e
                notice "Couldn't convert variable #{var} to hash: #{e}"
            end 

            if var_h.has_key? :type
                type = var_h[:type]
                virtual = var_h.has_key? :virtual and var_h[:virtual] == 'true'

                #Split out our :type parameter
                var_h.reject! { |k,v| k == :type or k == :virtual }

                #Create the virtual resource by sending it the type defined
                begin
                    unless virtual
                        #Make our resource
                        send type.to_sym, var, var_h
                    else
                        #Call our resource function and pass it to virtual
                        virtual send type.to_sym, var, var_h
                    end 
                rescue => e
                    fail "Couldn't create resource #{var}: #{e}"
                end 
            end 
        end 
    end 
end