Module: Aws::Cfn::Dsl::Simplify

Included in:
Base
Defined in:
lib/aws/cfn/dsl/mixins/simplify.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(includer) ⇒ Object 



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# File 'lib/aws/cfn/dsl/mixins/simplify.rb', line 52

def self.included(includer)

end

Instance Method Details

#simplify(val, start = false) ⇒ Object 



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# File 'lib/aws/cfn/dsl/mixins/simplify.rb', line 6

def simplify(val,start=false)
  logStep "Simplify a block ..." if start
  if val.is_a?(Hash)
    val = Hash[val.map { |k,v| [k, simplify(v)] }]
    if val.length != 1
      val
    else
      k, v = val.entries[0]
      case @config[:functions]
        when @on_yes_regex then
          case
            # CloudFormation functions
            when k == 'Fn::Base64'
              FnCall.new 'base64', [v], true
            when k == 'Fn::FindInMap'
              FnCall.new 'find_in_map', v
            when k == 'Fn::GetAtt'
              FnCall.new 'get_att', v
            when k == 'Fn::GetAZs'
              FnCall.new 'get_azs', v != '' ? [v] : []
            when k == 'Fn::Join'
              FnCall.new 'join', [v[0]] + v[1], true
            when k == 'Fn::Select'
              FnCall.new 'select', v
            when k == 'Ref' && v == 'AWS::Region'
              FnCall.new 'aws_region', []
            when k == 'Ref' && v == 'AWS::StackName'
              FnCall.new 'aws_stack_name', []
            # CloudFormation internal references
            when k == 'Ref'
              FnCall.new 'ref', [v]
            else
              val
          end
        else
          val
      end
    end
  elsif val.is_a?(Array)
    val.map { |v| simplify(v) }
  else
    val
  end
end