class Moonshot::ParentStackParameterLoader

Public Class Methods

new(config) click to toggle source
# File lib/moonshot/parent_stack_parameter_loader.rb, line 3
def initialize(config)
  @config = config
end

Public Instance Methods

load!() click to toggle source
# File lib/moonshot/parent_stack_parameter_loader.rb, line 7
def load!
  @config.parent_stacks.each do |stack_name|
    count = 0

    resp = cf_client.describe_stacks(stack_name: stack_name)
    raise "Parent Stack #{stack_name} not found!" unless resp.stacks.size == 1

    # If there is an input parameters matching a stack output, pass it.
    resp.stacks[0].outputs.each do |output|
      next unless @config.parameters.key?(output.output_key)
      # Our Stack has a Parameter matching this output. Set it's
      # value to the Output's value.
      count += 1
      @config.parameters.fetch(output.output_key).set(output.output_value)
    end

    puts "Imported #{count} parameters from parent stack #{stack_name.blue}!" if count > 0
  end
end
load_missing_only!() click to toggle source
# File lib/moonshot/parent_stack_parameter_loader.rb, line 27
def load_missing_only!
  @config.parent_stacks.each do |stack_name|
    resp = cf_client.describe_stacks(stack_name: stack_name)
    raise "Parent Stack #{stack_name} not found!" unless resp.stacks.size == 1

    # If there is an input parameters matching a stack output, pass it.
    resp.stacks[0].outputs.each do |output|
      next unless @config.parameters.key?(output.output_key)
      # Our Stack has a Parameter matching this output. Set it's
      # value to the Output's value, but only if we don't already
      # have a previous value we're using.
      unless @config.parameters.fetch(output.output_key).use_previous?
        @config.parameters.fetch(output.output_key).set(output.output_value)
      end
    end
  end
end

Private Instance Methods

cf_client() click to toggle source
# File lib/moonshot/parent_stack_parameter_loader.rb, line 47
def cf_client
  Aws::CloudFormation::Client.new
end