Module: KnifeCloudformation::Knife::Stack::InstanceMethods

Defined in:
lib/knife-cloudformation/knife/stack.rb

Constant Summary collapse

MAX_PARAMETER_ATTEMPTS =

maximum number of attempts to get valid parameter value

5

Instance Method Summary collapse

Instance Method Details

#populate_parameters!(stack) ⇒ Hash

Prompt for parameter values and store result

Parameters:

  • stack (Hash) —

    stack template

Returns:

  • (Hash) 


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# File 'lib/knife-cloudformation/knife/stack.rb', line 18

def populate_parameters!(stack)
  if(Chef::Config[:knife][:cloudformation][:interactive_parameters])
    if(stack['Parameters'] || stack['parameters'])
      Chef::Config[:knife][:cloudformation][:options][:parameters] ||= Mash.new
      stack.fetch('Parameters', stack.fetch('parameters', {})).each do |k,v|
        next if Chef::Config[:knife][:cloudformation][:options][:parameters][k]
        attempt = 0
        valid = false
        until(valid)
          attempt += 1
          default = Chef::Config[:knife][:cloudformation][:options][:parameters][k] || v['Default'] || v['default']
          answer = ui.ask_question("#{k.split(/([A-Z]+[^A-Z]*)/).find_all{|s|!s.empty?}.join(' ')}: ", :default => default)
          validation = KnifeCloudformation::Utils::StackParameterValidator.validate(answer, v)
          if(validation == true)
            Chef::Config[:knife][:cloudformation][:options][:parameters][k] = answer
            valid = true
          else
            validation.each do |validation_error|
              ui.error validation_error.last
            end
          end
          if(attempt > MAX_PARAMETER_ATTEMPTS)
            ui.fatal 'Failed to receive allowed parameter!'
            exit 1
          end
        end
      end
    end
  end
  stack
end