lib/convection/model/template.rb in convection-2.1.2 vs lib/convection/model/template.rb in convection-2.2.0

@@ -249,11 +249,11 @@
           group.run_definition
           group.execute
         end
       end
 
-      def render(stack_ = nil)
+      def render(stack_ = nil, retain: false)
         ## Instantiate a new template with the definition block and an other stack
         return clone(stack_).render unless stack_.nil?
 
         execute ## Process the template document
 
@@ -261,11 +261,16 @@
           'AWSTemplateFormatVersion' => version,
           'Description' => description,
           'Parameters' => parameters.map(&:render),
           'Mappings' => mappings.map(&:render),
           'Conditions' => conditions.map(&:render),
-          'Resources' => all_resources.map(&:render),
+          'Resources' => all_resources.map do |resource|
+            if retain && resource.deletion_policy.nil?
+              resource.deletion_policy('Retain')
+            end
+            resource.render
+          end,
           'Outputs' => outputs.map(&:render),
           'Metadata' => metadata.map(&:render)
         }
       end
 
@@ -273,15 +278,15 @@
         resource_collections.reduce(resources) do |result, (_name, resource_collection)|
           result.merge(resource_collection.resources)
         end
       end
 
-      def diff(other, stack_ = nil)
-        render(stack_).diff(other).map { |diff| Diff.new(diff[0], *diff[1]) }
+      def diff(other, stack_ = nil, retain: false)
+        render(stack_, retain: retain).diff(other).map { |diff| Diff.new(diff[0], *diff[1]) }
       end
 
-      def to_json(stack_ = nil, pretty = false)
-        rendered_stack = render(stack_)
+      def to_json(stack_ = nil, pretty = false, retain: false)
+        rendered_stack = render(stack_, retain: retain)
         validate(rendered_stack)
         return JSON.generate(rendered_stack) unless pretty
         JSON.pretty_generate(rendered_stack)
       end