generate a random data bag secret when generating bootstrap config

lib/formatron/generators/bootstrap/formatronfile.rb

@@ -19,6 +19,10 @@ def initialize(params)
           def guid
             Util.guid
           end
+
+          def databag_secret
+            Util.databag_secret
+          end
         end
 
         def self.write(directory, params)

lib/formatron/generators/bootstrap/formatronfile/Formatronfile.erb

@@ -4,6 +4,7 @@ formatron.bucket '<%= params[:s3_bucket] %>'
 formatron.global do |global|
   global.protect config['protected']
   global.kms_key '<%= params[:kms_key] %>'
+  global.databag_secret '<%= databag_secret %>'
   global.hosted_zone_id '<%= params[:hosted_zone_id] %>'
 
   global.ec2 do |ec2|

lib/formatron/generators/util.rb

@@ -5,6 +5,10 @@ module Util
       def self.guid
         Random.rand(36**8).to_s(36).upcase
       end
+
+      def self.databag_secret
+        Random.rand(36**40).to_s(36).upcase
+      end
     end
   end
 end

spec/formatron/generators/bootstrap_spec.rb

@@ -35,6 +35,7 @@
       }
     }
   }
+  databag_secret = 'databag_secret'
   vpc_guid = 'vpc_guid'
   management_subnet_guid = 'management_subnet_guid'
   bastion_guid = 'bastion_guid'
@@ -67,6 +68,7 @@
       allow(util_class).to receive(:guid) do
         guids.shift
       end
+      allow(util_class).to receive(:databag_secret) { databag_secret }
       Formatron::Generators::Bootstrap.generate directory, params
     end
 
@@ -106,6 +108,7 @@
         formatron.global do |global|
           global.protect config['protected']
           global.kms_key '#{params[:kms_key]}'
+          global.databag_secret '#{databag_secret}'
           global.hosted_zone_id '#{params[:hosted_zone_id]}'
 
           global.ec2 do |ec2|

spec/formatron/generators/util_spec.rb

@@ -21,6 +21,26 @@ module Generators
           expect(Util.guid).to eql guid
         end
       end
+
+      describe '#databag_secret' do
+        databag_secret = 'RJDY7W3TW99BMMBIVKGTRBUGW51MCYZC5121JA87'
+        # rubocop:disable Metrics/LineLength
+        random = 136_690_544_786_843_736_891_389_940_419_100_424_921_600_504_110_568_485_585_351_559
+        # rubocop:enable Metrics/LineLength
+
+        before :each do
+          random_class = class_double(
+            'Random'
+          ).as_stubbed_const
+          allow(random_class).to receive(:rand).with(
+            36**40
+          ) { random }
+        end
+
+        it 'should generate a random 40 character string' do
+          expect(Util.databag_secret).to eql databag_secret
+        end
+      end
     end
   end
 end