Module: References

Defined in:
lib/cfn-model/model/references.rb

Overview

this is a placeholder for anything related to resolving references

not sure if we are going to be able to have a useful generic set of code for references yet… in the meantime pile things up here and hope a pattern becomes clear

Class Method Summary collapse

Class Method Details

.is_security_group_id_external(group_id) ⇒ Object 



48
49
50
 
# File 'lib/cfn-model/model/references.rb', line 48

def self.is_security_group_id_external(group_id)
  resolve_security_group_id(group_id).nil?
end

.resolve_resource_id(reference, attr = nil) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/cfn-model/model/references.rb', line 32

def self.resolve_resource_id(reference, attr = nil)
  return nil if reference.is_a? String

  # an imported value can only yield a literal to an external resource vs. referencing something local
  if !reference['Ref'].nil?
    reference['Ref']
  elsif !reference['Fn::GetAtt'].nil?
    logical_resource_id_from_get_att reference['Fn::GetAtt'], attr
  else
    # anything else will be string manipulation functions
    # which again leads us back to a string which must be an external resource known out of band
    # so don't/can't link it up
    return nil
  end
end

.resolve_security_group_id(group_id) ⇒ Object 



52
53
54
 
# File 'lib/cfn-model/model/references.rb', line 52

def self.resolve_security_group_id(group_id)
  resolve_resource_id group_id, 'GroupId'
end

.resolve_value(cfn_model, value) ⇒ Object 



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/cfn-model/model/references.rb', line 10

def self.resolve_value(cfn_model, value)
  if value.is_a? Hash
    if value.has_key?('Ref')
      ref_id = value['Ref']
      if ref_id.is_a? String
        if cfn_model.parameters.has_key?(ref_id)
          return value if cfn_model.parameters[ref_id].synthesized_value.nil?
          return cfn_model.parameters[ref_id].synthesized_value
        else
          return value
        end
      else
        return value
      end
    else
      return value
    end
  else
    return value
  end
end